[Linux-cachefs] [PATCH 06/14] NFS: Share NFS superblocks per-protocol per-server per-FSID [try #10]
David Howells
dhowells at redhat.com
Fri May 19 15:46:57 UTC 2006
The attached patch makes NFS share superblocks between mounts from the same
server and FSID over the same protocol.
It does this by creating each superblock with a false root and returning the
real root dentry through the new argument added to get_sb() in patch 1/5. The
root dentry returned starts off as an anonymous dentry if we don't already have
the dentry for its inode, otherwise it simply returns the dentry we already
have.
We may thus end up with several trees of dentries in the superblock, and if at
some later point one of anonymous tree roots is discovered by normal filesystem
activity to be located in another tree within the superblock, the anonymous
root is named and materialises attached to the second tree at the appropriate
point.
Why modify get_sb() in this way? Why not pass an extra argument to the mount()
syscall to indicate the subpath and then pathwalk from the server root to the
desired directory? You can't guarantee this will work for two reasons:
(1) The root and intervening nodes may not be accessible to the client.
With NFS2 and NFS3, for instance, mountd is called on the server to get
the filehandle for the tip of a path. mountd won't give us handles for
anything we don't have permission to access, and so we can't set up NFS
inodes for such nodes, and so can't easily set up dentries (we'd have to
have ghost inodes or something).
With this patch we don't actually create dentries until we get handles
from the server that we can use to set up their inodes, and we don't
actually bind them into the tree until we know for sure where they go.
(2) Inaccessible symbolic links.
If we're asked to mount two exports from the server, eg:
mount warthog:/warthog/aaa/xxx /mmm
mount warthog:/warthog/bbb/yyy /nnn
We may not be able to access anything nearer the root than xxx and yyy,
but we may find out later that /mmm/www/yyy, say, is actually the same
directory as the one mounted on /nnn. What we might then find out, for
example, is that /warthog/bbb was actually a symbolic link to
/warthog/aaa/xxx/www, but we can't actually determine that by talking to
the server until /warthog is made available by NFS.
This would lead to having constructed an errneous dentry tree which we
can't easily fix. We can end up with a dentry marked as a directory when
it should actually be a symlink, or we could end up with an apparently
hardlinked directory.
With this patch we need not make assumptions about the type of a dentry
for which we can't retrieve information, nor need we assume we know its
place in the grand scheme of things until we actually see that place.
This patch reduces the possibility of aliasing in the inode and page caches for
inodes that may be accessed by more than one NFS export. It also reduces the
number of superblocks required for NFS where there are many NFS exports being
used from a server (home directory server + autofs for example).
This in turn makes it simpler to do local caching of network filesystems, as it
can then be guaranteed that there won't be links from multiple inodes in
separate superblocks to the same cache file.
Obviously, cache aliasing between different levels of NFS protocol is still a
problem, but at least that gives us another key to use when indexing the cache.
This patch also cleans up the error handling to make sure the NFS iostats are
released correctly upon error. The server construction and destruction have
been abstracted into functions as the first is done twice and the second four
times.
And finally, the patch exports some functions required from the core kernel.
The following changes were made in [try #2]:
(*) Whilst invoking link_path_walk(), the nfs4_get_root() routine now
temporarily overrides the FS settings of the process to prevent absolute
symbolic links from walking into the wrong namespace.
(*) nfs*_get_sb() instantiate the supplied vfsmount directly by assigning to
its mnt_root and mnt_sb members.
(*) nfs_readdir_lookup() creates dentries for each of the entries readdir()
returns; this function now attaches disconnected trees from alternate
roots that happen to be discovered attached to a directory being read (in
the same way nfs_lookup() is made to do for lookup ops).
Further changes [try #3] that have been made:
(*) The patches are now against Trond's NFS git tree, so won't apply to
Linus's tree.
(*) The server record construction/destruction has been abstracted out into
its own pair of functions to make things easier to get right.
Further changes [try #7] that have been made:
(*) The new d_materialise_unique() function is now used in place of the
combination of d_find_alias(), d_materialise_dentry() and
d_add_unique() in nfs_lookup() and nfs_readdir_lookup().
This permits the combination to be done under one set of locks, thus
avoiding any race between mount and lookup operations on the same
directory.
Further changes [try #8] that have been made:
(*) The NFS server specific information has been taken from struct nfs_server
and placed in struct nfs_client. nfs_client structs are then shared
between nfs_server structs where possible.
(*) struct nfs4_client has been merged into nfs_client.
(*) The client management code has been moved to fs/nfs/client.c.
(*) The client management code uses a new debug facility: NFSDBG_CLIENT which
is set by echoing 1024 to /proc/net/sunrpc/nfs_debug.
(*) More of the NFS2/3 and NFS4 code is now shared.
(*) The initial NFS superblock construction (get_sb) is now performed in the
following order:
(a) A volume representation (struct nfs_server) is allocated.
(b) A client representation (struct nfs_client) is acquired. This may be
allocated or shared, keyed on server address, port and NFS version.
(c) If allocated, the client representation is initialised. The state
member variable of nfs_client is used to prevent a race during
initialisation from two mounts.
(d) For NFS4 a simple pathwalk is performed, walking from FH to FH to find
the root filehandle for the mount (fs/nfs/getroot.c).
(e) The volume FSID is probed for on the root filehandle.
(f) The volume representation is initialised.
(g) sget() is called to acquire a superblock. This may be allocated or
shared, keyed on client pointer and FSID.
(h) If allocated, the superblock is initialised.
(i) If the superblock is shared, then the new nfs_server record is
discarded.
(*) Two new proc files have been made available:
/proc/fs/nfsfs/clients
/proc/fs/nfsfs/volumes
The first lists the servers for which we have clients allocated (struct
nfs_client), and the second lists the volumes we have on those servers
(struct nfs_server).
(*) Clone mounts are now called xdev mounts.
Further changes [try #9] that have been made:
(*) The exports from fs/namespace.c and fs/namei.c are no longer required.
Further changes [try #10] that have been made:
(*) nfs4_pathname_string() needed an extra const.
Signed-Off-By: David Howells <dhowells at redhat.com>
---
fs/nfs/Makefile | 6
fs/nfs/callback.c | 17 -
fs/nfs/callback.h | 7
fs/nfs/callback_proc.c | 13
fs/nfs/client.c | 1392 +++++++++++++++++++++++++++++++++++++++++++++
fs/nfs/delegation.c | 35 +
fs/nfs/delegation.h | 10
fs/nfs/dir.c | 28 +
fs/nfs/direct.c | 8
fs/nfs/file.c | 10
fs/nfs/getroot.c | 306 ++++++++++
fs/nfs/idmap.c | 25 -
fs/nfs/inode.c | 15
fs/nfs/internal.h | 101 ++-
fs/nfs/namespace.c | 33 +
fs/nfs/nfs3acl.c | 8
fs/nfs/nfs3proc.c | 16 -
fs/nfs/nfs4_fs.h | 27 -
fs/nfs/nfs4namespace.c | 120 +++-
fs/nfs/nfs4proc.c | 212 +++----
fs/nfs/nfs4renewd.c | 21 -
fs/nfs/nfs4state.c | 176 +-----
fs/nfs/nfs4xdr.c | 42 +
fs/nfs/pagelist.c | 2
fs/nfs/proc.c | 10
fs/nfs/read.c | 12
fs/nfs/super.c | 1393 +++++++++++++++------------------------------
fs/nfs/write.c | 16 -
include/linux/nfs_fs.h | 14
include/linux/nfs_fs_sb.h | 80 ++-
include/linux/nfs_idmap.h | 14
include/linux/nfs_xdr.h | 3
32 files changed, 2736 insertions(+), 1436 deletions(-)
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index 0b572a0..f4580b4 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -4,9 +4,9 @@ #
obj-$(CONFIG_NFS_FS) += nfs.o
-nfs-y := dir.o file.o inode.o super.o nfs2xdr.o pagelist.o \
- proc.o read.o symlink.o unlink.o write.o \
- namespace.o
+nfs-y := client.o dir.o file.o getroot.o inode.o super.o nfs2xdr.o \
+ pagelist.o proc.o read.o symlink.o unlink.o \
+ write.o namespace.o
nfs-$(CONFIG_ROOT_NFS) += nfsroot.o mount_clnt.o
nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3xdr.o
nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 9817065..bd3f57c 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -20,6 +20,7 @@ #include <net/inet_sock.h>
#include "nfs4_fs.h"
#include "callback.h"
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_CALLBACK
@@ -132,10 +133,8 @@ out_err:
/*
* Kill the server process if it is not already up.
*/
-int nfs_callback_down(void)
+void nfs_callback_down(void)
{
- int ret = 0;
-
lock_kernel();
mutex_lock(&nfs_callback_mutex);
nfs_callback_info.users--;
@@ -147,20 +146,20 @@ int nfs_callback_down(void)
} while (wait_for_completion_timeout(&nfs_callback_info.stopped, 5*HZ) == 0);
mutex_unlock(&nfs_callback_mutex);
unlock_kernel();
- return ret;
}
static int nfs_callback_authenticate(struct svc_rqst *rqstp)
{
- struct in_addr *addr = &rqstp->rq_addr.sin_addr;
- struct nfs4_client *clp;
+ struct sockaddr_in *addr = &rqstp->rq_addr;
+ struct nfs_client *clp;
/* Don't talk to strangers */
- clp = nfs4_find_client(addr);
+ clp = nfs_find_client(addr, 4);
if (clp == NULL)
return SVC_DROP;
- dprintk("%s: %u.%u.%u.%u NFSv4 callback!\n", __FUNCTION__, NIPQUAD(addr));
- nfs4_put_client(clp);
+ dprintk("%s: %u.%u.%u.%u NFSv4 callback!\n",
+ __FUNCTION__, NIPQUAD(addr->sin_addr));
+ nfs_put_client(clp);
switch (rqstp->rq_authop->flavour) {
case RPC_AUTH_NULL:
if (rqstp->rq_proc != CB_NULL)
diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
index b252e7f..5676163 100644
--- a/fs/nfs/callback.h
+++ b/fs/nfs/callback.h
@@ -62,8 +62,13 @@ struct cb_recallargs {
extern unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res);
extern unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy);
+#ifdef CONFIG_NFS_V4
extern int nfs_callback_up(void);
-extern int nfs_callback_down(void);
+extern void nfs_callback_down(void);
+#else
+#define nfs_callback_up() (0)
+#define nfs_callback_down() do {} while(0)
+#endif
extern unsigned int nfs_callback_set_tcpport;
extern unsigned short nfs_callback_tcpport;
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index 462cfce..21f18ee 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -11,19 +11,20 @@ #include <linux/nfs_fs.h>
#include "nfs4_fs.h"
#include "callback.h"
#include "delegation.h"
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_CALLBACK
unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res)
{
- struct nfs4_client *clp;
+ struct nfs_client *clp;
struct nfs_delegation *delegation;
struct nfs_inode *nfsi;
struct inode *inode;
res->bitmap[0] = res->bitmap[1] = 0;
res->status = htonl(NFS4ERR_BADHANDLE);
- clp = nfs4_find_client(&args->addr->sin_addr);
+ clp = nfs_find_client(args->addr, 4);
if (clp == NULL)
goto out;
inode = nfs_delegation_find_inode(clp, &args->fh);
@@ -49,7 +50,7 @@ out_iput:
up_read(&nfsi->rwsem);
iput(inode);
out_putclient:
- nfs4_put_client(clp);
+ nfs_put_client(clp);
out:
dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status));
return res->status;
@@ -57,12 +58,12 @@ out:
unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy)
{
- struct nfs4_client *clp;
+ struct nfs_client *clp;
struct inode *inode;
unsigned res;
res = htonl(NFS4ERR_BADHANDLE);
- clp = nfs4_find_client(&args->addr->sin_addr);
+ clp = nfs_find_client(args->addr, 4);
if (clp == NULL)
goto out;
inode = nfs_delegation_find_inode(clp, &args->fh);
@@ -81,7 +82,7 @@ unsigned nfs4_callback_recall(struct cb_
}
iput(inode);
out_putclient:
- nfs4_put_client(clp);
+ nfs_put_client(clp);
out:
dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res));
return res;
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
new file mode 100644
index 0000000..d2bf7f5
--- /dev/null
+++ b/fs/nfs/client.c
@@ -0,0 +1,1392 @@
+/* client.c: NFS client sharing and management code
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells at redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/stats.h>
+#include <linux/sunrpc/metrics.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_mount.h>
+#include <linux/nfs4_mount.h>
+#include <linux/lockd/bind.h>
+#include <linux/smp_lock.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
+#include <linux/nfs_idmap.h>
+#include <linux/vfs.h>
+#include <linux/inet.h>
+#include <linux/nfs_xdr.h>
+
+#include <asm/system.h>
+
+#include "nfs4_fs.h"
+#include "callback.h"
+#include "delegation.h"
+#include "iostat.h"
+#include "internal.h"
+
+#define NFSDBG_FACILITY NFSDBG_CLIENT
+
+
+static DEFINE_SPINLOCK(nfs_client_lock);
+static LIST_HEAD(nfs_client_list);
+static LIST_HEAD(nfs_volume_list);
+static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
+
+static const char *nfs_auth_flavours[RPC_AUTH_MAXFLAVOR] = {
+ [RPC_AUTH_NULL] = "null",
+ [RPC_AUTH_UNIX] = "unix",
+ [RPC_AUTH_SHORT] = "shrt",
+ [RPC_AUTH_DES] = "des ",
+ [RPC_AUTH_KRB] = "krb ",
+ [RPC_AUTH_GSS] = "gss ",
+};
+
+/*
+ * RPC cruft for NFS
+ */
+static struct rpc_version *nfs_version[5] = {
+ [2] = &nfs_version2,
+#ifdef CONFIG_NFS_V3
+ [3] = &nfs_version3,
+#endif
+#ifdef CONFIG_NFS_V4
+ [4] = &nfs_version4,
+#endif
+};
+
+struct rpc_program nfs_program = {
+ .name = "nfs",
+ .number = NFS_PROGRAM,
+ .nrvers = ARRAY_SIZE(nfs_version),
+ .version = nfs_version,
+ .stats = &nfs_rpcstat,
+ .pipe_dir_name = "/nfs",
+};
+
+struct rpc_stat nfs_rpcstat = {
+ .program = &nfs_program
+};
+
+
+#ifdef CONFIG_NFS_V3_ACL
+static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
+static struct rpc_version * nfsacl_version[] = {
+ [3] = &nfsacl_version3,
+};
+
+struct rpc_program nfsacl_program = {
+ .name = "nfsacl",
+ .number = NFS_ACL_PROGRAM,
+ .nrvers = ARRAY_SIZE(nfsacl_version),
+ .version = nfsacl_version,
+ .stats = &nfsacl_rpcstat,
+};
+#endif /* CONFIG_NFS_V3_ACL */
+
+/*
+ * Allocate a shared client record
+ *
+ * Since these are allocated/deallocated very rarely, we don't
+ * bother putting them in a slab cache...
+ */
+static struct nfs_client *nfs_alloc_client(const char *hostname,
+ struct sockaddr_in *addr,
+ int nfsversion)
+{
+ struct nfs_client *clp;
+ int error;
+
+ if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
+ goto error_0;
+
+ error = rpciod_up();
+ if (error < 0) {
+ dprintk("%s: couldn't start rpciod! Error = %d\n",
+ __FUNCTION__, error);
+ goto error_1;
+ }
+
+ if (nfs_callback_up() < 0)
+ goto error_2;
+
+ atomic_set(&clp->usage, 1);
+ clp->state = NFS_CS_INITING;
+
+ clp->nfsversion = nfsversion;
+ memcpy(&clp->addr, addr, sizeof(clp->addr));
+
+ if (hostname) {
+ clp->hostname = kstrdup(hostname, GFP_KERNEL);
+ if (!clp->hostname)
+ goto error_3;
+ }
+
+ clp->authflavour = RPC_AUTH_NULL;
+ INIT_LIST_HEAD(&clp->superblocks);
+ clp->client = clp->client_sys = clp->client_acl = ERR_PTR(-EINVAL);
+
+#ifdef CONFIG_NFS_V4
+ init_rwsem(&clp->cl_sem);
+ INIT_LIST_HEAD(&clp->cl_delegations);
+ INIT_LIST_HEAD(&clp->cl_state_owners);
+ INIT_LIST_HEAD(&clp->cl_unused);
+ spin_lock_init(&clp->cl_lock);
+ INIT_WORK(&clp->cl_renewd, nfs4_renew_state, clp);
+ rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
+ clp->cl_rpcclient = ERR_PTR(-EINVAL);
+ clp->cl_boot_time = CURRENT_TIME;
+ clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
+#endif
+
+ return clp;
+
+error_3:
+ nfs_callback_down();
+error_2:
+ rpciod_down();
+error_1:
+ kfree(clp);
+error_0:
+ return NULL;
+}
+
+/*
+ * Destroy a shared client record
+ */
+static void nfs_free_client(struct nfs_client *clp)
+{
+#ifdef CONFIG_NFS_V4
+ struct nfs4_state_owner *sp;
+#endif
+ struct rpc_clnt *rpc;
+
+ dprintk("--> nfs_free_client()\n");
+
+ /* -EIO all pending I/O */
+ rpc = clp->client;
+ if (!IS_ERR(rpc))
+ rpc_killall_tasks(rpc);
+ rpc = clp->client_acl;
+ if (!IS_ERR(rpc))
+ rpc_killall_tasks(rpc);
+
+#ifdef CONFIG_NFS_V4
+ while (!list_empty(&clp->cl_unused)) {
+ sp = list_entry(clp->cl_unused.next,
+ struct nfs4_state_owner,
+ so_list);
+ list_del(&sp->so_list);
+ kfree(sp);
+ }
+ BUG_ON(!list_empty(&clp->cl_state_owners));
+ nfs_idmap_delete(clp);
+ if (!IS_ERR(clp->cl_rpcclient))
+ rpc_shutdown_client(clp->cl_rpcclient);
+#endif
+ nfs_callback_down();
+
+ if (!IS_ERR(clp->client))
+ rpc_shutdown_client(clp->client);
+ if (!IS_ERR(clp->client_sys))
+ rpc_shutdown_client(clp->client_sys);
+ if (!IS_ERR(clp->client_acl))
+ rpc_shutdown_client(clp->client_acl);
+
+ if (!(clp->flags & NFS_MOUNT_NONLM))
+ lockd_down(); /* release rpc.lockd */
+
+ rpciod_down();
+
+ kfree(clp->hostname);
+ kfree(clp);
+
+ dprintk("<-- nfs_free_client()\n");
+}
+
+/*
+ * Release a reference to a shared client record
+ */
+void nfs_put_client(struct nfs_client *clp)
+{
+ dprintk("--> nfs_put_client({%d})\n", atomic_read(&clp->usage));
+
+ if (atomic_dec_and_lock(&clp->usage, &nfs_client_lock)) {
+ list_del(&clp->share_link);
+ spin_unlock(&nfs_client_lock);
+
+ BUG_ON(!list_empty(&clp->superblocks));
+
+#ifdef CONFIG_NFS_V4
+ rpc_wake_up(&clp->cl_rpcwaitq);
+ nfs4_kill_renewd(clp);
+#endif
+ nfs_free_client(clp);
+ }
+}
+
+/*
+ * Find a client by address
+ * - caller must hold nfs_client_lock
+ */
+static struct nfs_client *__nfs_find_client(const char *hostname,
+ struct sockaddr_in *addr,
+ int nfsversion)
+{
+ struct nfs_client *clp;
+
+ list_for_each_entry(clp, &nfs_client_list, share_link) {
+ if (clp->nfsversion != nfsversion)
+ continue;
+
+ if (hostname && clp->hostname &&
+ strcmp(hostname, clp->hostname) != 0)
+ continue;
+
+ if (!hostname &&
+ memcmp(&clp->addr.sin_addr, &addr->sin_addr,
+ sizeof(clp->addr.sin_addr)) != 0)
+ continue;
+
+ if (clp->addr.sin_port == addr->sin_port) {
+ atomic_inc(&clp->usage);
+ return clp;
+ }
+ }
+
+ return NULL;
+}
+
+/*
+ * Find a client by IP address and protocol version
+ * - returns NULL if no such client
+ */
+struct nfs_client *nfs_find_client(struct sockaddr_in *addr, int nfsversion)
+{
+ struct nfs_client *clp;
+
+ spin_lock(&nfs_client_lock);
+ clp = __nfs_find_client(NULL, addr, nfsversion);
+ spin_unlock(&nfs_client_lock);
+
+ return clp;
+}
+
+/*
+ * Look up a client by IP address and protocol version
+ * - creates a new record if one doesn't yet exist
+ */
+static struct nfs_client *nfs_get_client(const char *hostname,
+ struct sockaddr_in *addr,
+ int nfsversion)
+{
+ struct nfs_client *clp, *new = NULL;
+ int error;
+
+ dprintk("--> nfs_get_client(%s,"NIPQUAD_FMT":%d,%d)\n",
+ hostname ?: "", NIPQUAD(addr->sin_addr),
+ addr->sin_port, nfsversion);
+
+ /* see if the client already exists */
+ do {
+ spin_lock(&nfs_client_lock);
+
+ clp = __nfs_find_client(hostname, addr, nfsversion);
+ if (clp)
+ goto found_client;
+ if (new)
+ goto install_client;
+
+ spin_unlock(&nfs_client_lock);
+
+ new = nfs_alloc_client(hostname, addr, nfsversion);
+ } while (new);
+
+ return ERR_PTR(-ENOMEM);
+
+ /* install a new client and return with it unready */
+install_client:
+ clp = new;
+ list_add(&clp->share_link, &nfs_client_list);
+ spin_unlock(&nfs_client_lock);
+ dprintk("--> nfs_get_client() = %p [new]\n", clp);
+ return clp;
+
+ /* found an existing client
+ * - make sure it's ready before returning
+ */
+found_client:
+ spin_unlock(&nfs_client_lock);
+
+ if (new)
+ nfs_free_client(new);
+
+ if (clp->state == NFS_CS_INITING) {
+ DECLARE_WAITQUEUE(myself, current);
+
+ add_wait_queue(&nfs_client_active_wq, &myself);
+
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (signal_pending(current) ||
+ clp->state > NFS_CS_READY)
+ break;
+ schedule();
+ }
+
+ remove_wait_queue(&nfs_client_active_wq, &myself);
+
+ if (signal_pending(current)) {
+ nfs_put_client(clp);
+ return ERR_PTR(-ERESTARTSYS);
+ }
+ }
+
+ if (clp->state < NFS_CS_READY) {
+ error = clp->state;
+ nfs_put_client(clp);
+ return ERR_PTR(error);
+ }
+
+ dprintk("--> nfs_get_client() = %p [share]\n", clp);
+ return clp;
+}
+
+/*
+ * Mark a server as ready or failed
+ */
+static void nfs_mark_client_ready(struct nfs_client *clp, int state)
+{
+ clp->state = state;
+ wake_up_all(&nfs_client_active_wq);
+}
+
+/*
+ * Initialise the timeout values for a connection
+ */
+static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
+ unsigned int timeo, unsigned int retrans)
+{
+ to->to_initval = timeo * HZ / 10;
+ to->to_retries = retrans;
+ if (!to->to_retries)
+ to->to_retries = 2;
+
+ switch (proto) {
+ case IPPROTO_TCP:
+ if (!to->to_initval)
+ to->to_initval = 60 * HZ;
+ if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
+ to->to_initval = NFS_MAX_TCP_TIMEOUT;
+ to->to_increment = to->to_initval;
+ to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
+ to->to_exponential = 0;
+ break;
+ case IPPROTO_UDP:
+ default:
+ if (!to->to_initval)
+ to->to_initval = 11 * HZ / 10;
+ if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
+ to->to_initval = NFS_MAX_UDP_TIMEOUT;
+ to->to_maxval = NFS_MAX_UDP_TIMEOUT;
+ to->to_exponential = 1;
+ break;
+ }
+}
+
+/*
+ * Create an RPC client handle
+ */
+static struct rpc_clnt *nfs_create_rpc_client(struct nfs_client *clp,
+ const struct nfs_mount_data *data)
+{
+ struct rpc_timeout timeparms;
+ struct rpc_xprt *xprt = NULL;
+ struct rpc_clnt *clnt = NULL;
+ int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
+
+ nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
+
+ clp->retrans_timeo = timeparms.to_initval;
+ clp->retrans_count = timeparms.to_retries;
+
+ /* create transport and client */
+ xprt = xprt_create_proto(proto, &clp->addr, &timeparms);
+ if (IS_ERR(xprt)) {
+ dprintk("%s: cannot create RPC transport. Error = %ld\n",
+ __FUNCTION__, PTR_ERR(xprt));
+ return (struct rpc_clnt *)xprt;
+ }
+
+ clnt = rpc_create_client(xprt, clp->hostname, &nfs_program,
+ clp->rpc_ops->version, data->pseudoflavor);
+ if (IS_ERR(clnt)) {
+ dprintk("%s: cannot create RPC client. Error = %ld\n",
+ __FUNCTION__, PTR_ERR(xprt));
+ goto out_fail;
+ }
+
+ clnt->cl_intr = 1;
+ clnt->cl_softrtry = 1;
+
+ return clnt;
+
+out_fail:
+ return clnt;
+}
+
+/*
+ * Create a version 2 or 3 client
+ */
+static int nfs_create_client(struct nfs_mount_data *data, struct nfs_server *server)
+{
+ struct nfs_client *clp;
+ int error, nfsvers = 2;
+
+ dprintk("--> nfs_create_client()\n");
+
+#ifdef CONFIG_NFS_V3
+ if (data->flags & NFS_MOUNT_VER3)
+ nfsvers = 3;
+#endif
+
+ /* Allocate or find a client reference we can use */
+ clp = nfs_get_client(NULL, &data->addr, nfsvers);
+ if (IS_ERR(clp)) {
+ dprintk("<-- nfs_create_client() = error %ld\n", PTR_ERR(clp));
+ return PTR_ERR(clp);
+ }
+
+ server->nfs_client = clp;
+
+ if (clp->state == NFS_CS_READY) {
+ /* the client is already initialised */
+ dprintk("<-- nfs_create_client() = 0 [already %p]\n", clp);
+ return 0;
+ }
+
+ /* Initialise the client representation from the mount data */
+ clp->flags = data->flags & NFS_MOUNT_FLAGMASK;
+
+ if (data->rsize)
+ clp->rsize = nfs_block_size(data->rsize, NULL);
+ if (data->wsize)
+ clp->wsize = nfs_block_size(data->wsize, NULL);
+
+ clp->acregmin = data->acregmin * HZ;
+ clp->acregmax = data->acregmax * HZ;
+ clp->acdirmin = data->acdirmin * HZ;
+ clp->acdirmax = data->acdirmax * HZ;
+
+ /* Start lockd here, before we might error out */
+ if (!(clp->flags & NFS_MOUNT_NONLM)) {
+ error = lockd_up();
+ if (error < 0) {
+ clp->flags |= NFS_MOUNT_NONLM;
+ goto error;
+ }
+ }
+
+ error = -ENOMEM;
+ clp->namelen = data->namlen;
+ clp->hostname = kstrdup(data->hostname, GFP_KERNEL);
+ if (!clp->hostname)
+ goto error;
+
+ /* Check NFS protocol revision and initialize RPC op vector */
+ clp->rpc_ops = &nfs_v2_clientops;
+
+#ifdef CONFIG_NFS_V3
+ if (clp->flags & NFS_MOUNT_VER3) {
+ clp->rpc_ops = &nfs_v3_clientops;
+ clp->caps |= NFS_CAP_READDIRPLUS;
+ }
+#endif
+
+ /* Create the normal RPC client handle */
+ clp->client = nfs_create_rpc_client(clp, data);
+ if (IS_ERR(clp->client)) {
+ error = PTR_ERR(clp->client);
+ goto error;
+ }
+
+ /* Create a client RPC handle for doing FSSTAT with UNIX auth only
+ * - RFC 2623, sec 2.3.2
+ */
+ if (data->pseudoflavor != RPC_AUTH_UNIX) {
+ struct rpc_auth *auth;
+
+ clp->client_sys = rpc_clone_client(clp->client);
+ if (IS_ERR(clp->client_sys)) {
+ error = PTR_ERR(clp->client_sys);
+ goto error;
+ }
+
+ auth = rpcauth_create(RPC_AUTH_UNIX, clp->client_sys);
+ if (IS_ERR(auth)) {
+ error = PTR_ERR(auth);
+ goto error;
+ }
+
+ } else {
+ atomic_inc(&clp->client->cl_count);
+ clp->client_sys = clp->client;
+ }
+
+ clp->authflavour = data->pseudoflavor;
+
+ /* Create a client RPC handle for the NFSv3 ACL management interface */
+ if (clp->nfsversion == 3) {
+#ifdef CONFIG_NFS_V3_ACL
+ if (!(clp->flags & NFS_MOUNT_NOACL)) {
+ clp->client_acl = rpc_bind_new_program(clp->client, &nfsacl_program, 3);
+ /* No errors! Assume that Sun nfsacls are supported */
+ if (!IS_ERR(clp->client_acl))
+ clp->caps |= NFS_CAP_ACLS;
+ }
+#else
+ clp->flags &= ~NFS_MOUNT_NOACL;
+#endif /* CONFIG_NFS_V3_ACL */
+
+ if (clp->namelen == 0 || clp->namelen > NFS3_MAXNAMLEN)
+ clp->namelen = NFS3_MAXNAMLEN;
+ } else {
+ if (clp->namelen == 0 || clp->namelen > NFS2_MAXNAMLEN)
+ clp->namelen = NFS2_MAXNAMLEN;
+ }
+
+ nfs_mark_client_ready(clp, NFS_CS_READY);
+ dprintk("<-- nfs_create_client() = 0 [new %p]\n", clp);
+ return 0;
+
+error:
+ server->nfs_client = NULL;
+ nfs_mark_client_ready(clp, error);
+ nfs_put_client(clp);
+ dprintk("<-- nfs_create_client() = xerror %d\n", error);
+ return error;
+}
+
+/*
+ * probe filesystem information, including the FSID on v2/v3
+ */
+static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh)
+{
+ struct nfs_pathconf pathinfo;
+ struct nfs_fsinfo fsinfo;
+ struct nfs_fattr fattr;
+ struct nfs_client *clp = server->nfs_client;
+ unsigned long max_rpc_payload;
+ int error;
+
+ dprintk("--> nfs_probe_fsinfo()\n");
+
+ fsinfo.fattr = &fattr;
+ fattr.valid = 0;
+
+ error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
+ if (error < 0) {
+ dprintk("nfs_probe_fsinfo: fsinfo error = %d\n", -error);
+ return error;
+ }
+
+ server->maxfilesize = fsinfo.maxfilesize;
+
+ if (!(fattr.valid & NFS_ATTR_FATTR)) {
+ error = clp->rpc_ops->getattr(server, mntfh, &fattr);
+ if (error < 0) {
+ dprintk("nfs_probe_fsinfo: getattr error = %d\n", -error);
+ return error;
+ }
+ }
+
+ error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
+ if (error < 0) {
+ dprintk("nfs_probe_fsinfo: getattr error = %d\n", -error);
+ return error;
+ }
+
+
+ if (clp->nfsversion < 4) {
+ memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid));
+ dprintk("Probed FSID: %llx:%llx\n",
+ server->fsid.major, server->fsid.minor);
+ }
+
+ /* Get some general file system info */
+ if (clp->namelen == 0) {
+ pathinfo.fattr = &fattr;
+
+ if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
+ clp->namelen = pathinfo.max_namelen;
+ }
+
+ /* Work out a lot of parameters */
+ if (clp->rsize == 0)
+ clp->rsize = nfs_block_size(fsinfo.rtpref, NULL);
+ if (clp->wsize == 0)
+ clp->wsize = nfs_block_size(fsinfo.wtpref, NULL);
+
+ if (fsinfo.rtmax >= 512 && clp->rsize > fsinfo.rtmax)
+ clp->rsize = nfs_block_size(fsinfo.rtmax, NULL);
+ if (fsinfo.wtmax >= 512 && clp->wsize > fsinfo.wtmax)
+ clp->wsize = nfs_block_size(fsinfo.wtmax, NULL);
+
+ max_rpc_payload = nfs_block_size(rpc_max_payload(clp->client), NULL);
+ if (clp->rsize > max_rpc_payload)
+ clp->rsize = max_rpc_payload;
+ if (clp->rsize > NFS_MAX_FILE_IO_SIZE)
+ clp->rsize = NFS_MAX_FILE_IO_SIZE;
+ clp->rpages = (clp->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ clp->backing_dev_info.ra_pages = clp->rpages * NFS_MAX_READAHEAD;
+
+ if (clp->wsize > max_rpc_payload)
+ clp->wsize = max_rpc_payload;
+ if (clp->wsize > NFS_MAX_FILE_IO_SIZE)
+ clp->wsize = NFS_MAX_FILE_IO_SIZE;
+ clp->wpages = (clp->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ clp->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
+
+ clp->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
+ if (clp->dtsize > PAGE_CACHE_SIZE)
+ clp->dtsize = PAGE_CACHE_SIZE;
+ if (clp->dtsize > clp->rsize)
+ clp->dtsize = clp->rsize;
+
+ if (clp->flags & NFS_MOUNT_NOAC) {
+ clp->acregmin = clp->acregmax = 0;
+ clp->acdirmin = clp->acdirmax = 0;
+ }
+
+ clp->client->cl_intr = (clp->flags & NFS_MOUNT_INTR) ? 1 : 0;
+ clp->client->cl_softrtry = (clp->flags & NFS_MOUNT_SOFT) ? 1 : 0;
+
+ /* We're airborne Set socket buffersize */
+ rpc_setbufsize(clp->client, clp->wsize + 100, clp->rsize + 100);
+
+ dprintk("<-- nfs_probe_fsinfo() = 0\n");
+ return 0;
+}
+
+/*
+ * Allocate and initialise a server record
+ */
+static struct nfs_server *nfs_alloc_server(void)
+{
+ struct nfs_server *server;
+
+ server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
+ if (!server)
+ return NULL;
+
+ /* Zero out the NFS state stuff */
+ INIT_LIST_HEAD(&server->client_link);
+ INIT_LIST_HEAD(&server->master_link);
+
+ server->io_stats = nfs_alloc_iostats();
+ if (!server->io_stats) {
+ kfree(server);
+ return NULL;
+ }
+
+ return server;
+}
+
+/*
+ * Free up a server record
+ */
+void nfs_free_server(struct nfs_server *server)
+{
+ dprintk("--> nfs_free_server()\n");
+
+ spin_lock(&nfs_client_lock);
+ list_del(&server->client_link);
+ list_del(&server->master_link);
+ spin_unlock(&nfs_client_lock);
+
+ nfs_free_iostats(server->io_stats);
+ nfs_put_client(server->nfs_client);
+ kfree(server);
+ nfs_release_automount_timer();
+ dprintk("<-- nfs_free_server()\n");
+}
+
+/*
+ * Create a version 2 or 3 volume record
+ * - keyed on server and FSID
+ */
+struct nfs_server *nfs_create_server(struct nfs_mount_data *data,
+ struct nfs_fh *mntfh)
+{
+ struct nfs_server *server;
+ int error;
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ /* Get a client representation */
+ error = nfs_create_client(data, server);
+ if (error < 0)
+ goto error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ server->caps = server->nfs_client->caps;
+
+ /* Probe the root fh to retrieve its FSID */
+ error = nfs_probe_fsinfo(server, mntfh);
+ if (error < 0)
+ goto error;
+
+ dprintk("Server FSID: %llx:%llx\n", server->fsid.major, server->fsid.minor);
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ spin_lock(&nfs_client_lock);
+ list_add_tail(&server->client_link, &server->nfs_client->superblocks);
+ list_add_tail(&server->master_link, &nfs_volume_list);
+ spin_unlock(&nfs_client_lock);
+
+ server->mount_time = jiffies;
+ return server;
+
+error:
+ nfs_free_server(server);
+ return ERR_PTR(error);
+}
+
+#ifdef CONFIG_NFS_V4
+/*
+ * Create a version 4 client
+ */
+static int nfs4_create_client(struct nfs4_mount_data *data,
+ const char *hostname,
+ struct sockaddr_in *addr,
+ rpc_authflavor_t authflavour,
+ struct nfs_server *server)
+{
+ struct rpc_timeout timeparms;
+ struct nfs_client *clp;
+ struct rpc_xprt *xprt;
+ struct rpc_clnt *clnt;
+ int error;
+
+ dprintk("--> nfs4_create_client()\n");
+
+ /* Allocate or find a client reference we can use */
+ clp = nfs_get_client(hostname, addr, 4);
+ if (IS_ERR(clp)) {
+ dprintk("<-- nfs4_create_client() = error %ld\n", PTR_ERR(clp));
+ return PTR_ERR(clp);
+ }
+
+ server->nfs_client = clp;
+
+ if (clp->state == NFS_CS_READY) {
+ /* the client is initialised already */
+ dprintk("<-- nfs4_create_client() = 0 [already %p]\n", clp);
+ return 0;
+ }
+
+ /* Initialise the client representation from the mount data */
+ clp->authflavour = authflavour;
+ clp->flags = data->flags & NFS_MOUNT_FLAGMASK;
+ clp->caps |= NFS_CAP_ATOMIC_OPEN;
+
+ if (data->rsize)
+ clp->rsize = nfs_block_size(data->rsize, NULL);
+ if (data->wsize)
+ clp->wsize = nfs_block_size(data->wsize, NULL);
+
+ clp->acregmin = data->acregmin * HZ;
+ clp->acregmax = data->acregmax * HZ;
+ clp->acdirmin = data->acdirmin * HZ;
+ clp->acdirmax = data->acdirmax * HZ;
+
+ nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
+ clp->retrans_timeo = timeparms.to_initval;
+ clp->retrans_count = timeparms.to_retries;
+
+ /* Start lockd here, before we might error out */
+ if (!(clp->flags & NFS_MOUNT_NONLM)) {
+ error = lockd_up();
+ if (error < 0) {
+ clp->flags |= NFS_MOUNT_NONLM;
+ goto error;
+ }
+ }
+
+ /* Check NFS protocol revision and initialize RPC op vector */
+ clp->rpc_ops = &nfs_v4_clientops;
+
+ /* Now create transport and client */
+ BUG_ON(!IS_ERR(clp->cl_rpcclient));
+
+ xprt = xprt_create_proto(data->proto, &clp->addr, &timeparms);
+ if (IS_ERR(xprt))
+ goto error_transport;
+
+ /* Bind to a reserved port! */
+ xprt->resvport = 1;
+ clnt = rpc_create_client(xprt, clp->hostname, &nfs_program,
+ clp->rpc_ops->version, authflavour);
+ if (IS_ERR(clnt))
+ goto error_client;
+
+ clnt->cl_intr = 1;
+ clnt->cl_softrtry = 1;
+ clp->cl_rpcclient = clnt;
+
+ clnt = rpc_clone_client(clp->cl_rpcclient);
+ if (IS_ERR(clnt))
+ goto error_client;
+ clp->client = clnt;
+
+ error = nfs_idmap_new(clp);
+ if (error < 0)
+ goto error_idmap;
+
+ if (clnt->cl_auth->au_flavor != authflavour) {
+ struct rpc_auth *auth;
+
+ auth = rpcauth_create(authflavour, clp->client);
+ if (IS_ERR(auth)) {
+ dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
+ error = PTR_ERR(auth);
+ goto error;
+ }
+ }
+
+ /* Done */
+ nfs_mark_client_ready(clp, NFS_CS_READY);
+ dprintk("<-- nfs4_create_client() = 0 [new %p]\n", clp);
+ return 0;
+
+error:
+ server->nfs_client = NULL;
+ nfs_mark_client_ready(clp, error);
+ nfs_put_client(clp);
+ dprintk("<-- nfs4_create_client() = xerror %d\n", error);
+ return error;
+
+error_transport:
+ error = PTR_ERR(xprt);
+ dprintk("%s: cannot create RPC transport. Error = %d\n",
+ __FUNCTION__, error);
+ goto error;
+
+error_client:
+ error = PTR_ERR(clnt);
+ dprintk("%s: cannot create RPC client. Error = %d\n",
+ __FUNCTION__, error);
+ goto error;
+
+error_idmap:
+ dprintk("%s: failed to create idmapper. Error = %d\n",
+ __FUNCTION__, error);
+ goto error;
+}
+
+/*
+ * Create a version 4 volume record
+ * - keyed on server and FSID
+ */
+struct nfs_server *nfs4_create_server(struct nfs4_mount_data *data,
+ char *hostname,
+ struct sockaddr_in *addr,
+ char *mntpath,
+ char *ip_addr,
+ rpc_authflavor_t authflavour,
+ struct nfs_fh *mntfh)
+{
+ struct nfs_server *server;
+ int error;
+
+ dprintk("--> nfs4_create_server()\n");
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ /* Get a client representation */
+ error = nfs4_create_client(data, hostname, addr, authflavour, server);
+ if (error < 0)
+ goto error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ server->caps = server->nfs_client->caps;
+
+ /* Probe the root fh to retrieve its FSID */
+ error = nfs4_path_walk(server, mntfh, mntpath);
+ if (error < 0)
+ goto error;
+
+ dprintk("Server FSID: %llx:%llx\n", server->fsid.major, server->fsid.minor);
+ dprintk("Mount FH: %d\n", mntfh->size);
+
+ error = nfs_probe_fsinfo(server, mntfh);
+ if (error < 0)
+ goto error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ spin_lock(&nfs_client_lock);
+ list_add_tail(&server->client_link, &server->nfs_client->superblocks);
+ list_add_tail(&server->master_link, &nfs_volume_list);
+ spin_unlock(&nfs_client_lock);
+
+ server->mount_time = jiffies;
+ dprintk("<-- nfs4_create_server() = %p\n", server);
+ return server;
+
+error:
+ nfs_free_server(server);
+ dprintk("<-- nfs4_create_server() = error %d\n", error);
+ return ERR_PTR(error);
+}
+
+/*
+ * Create an NFS4 referral server record
+ */
+struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
+ struct nfs_fh *fh)
+{
+ struct nfs4_mount_data mdata;
+ struct nfs_client *xclp;
+ struct nfs_server *server;
+ struct nfs_fsinfo fsinfo;
+ struct nfs_fattr fattr;
+ int error;
+
+ dprintk("--> nfs4_create_referral_server()\n");
+
+ server = nfs_alloc_server();
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ /* Get a client representation */
+ memset(&mdata, 0, sizeof(mdata));
+ xclp = NFS_SB(data->sb)->nfs_client;
+ mdata.version = 1;
+ mdata.flags = xclp->flags;
+ mdata.timeo = 2;
+ mdata.retrans = 1;
+ mdata.acregmin = xclp->acregmin;
+ mdata.acregmax = xclp->acregmax;
+ mdata.acdirmin = xclp->acdirmin;
+ mdata.acdirmax = xclp->acdirmax;
+ mdata.proto = IPPROTO_TCP;
+
+ error = nfs4_create_client(&mdata, data->hostname, data->addr,
+ data->authflavor, server);
+ if (error < 0)
+ goto error;
+
+ BUG_ON(!server->nfs_client);
+ BUG_ON(!server->nfs_client->rpc_ops);
+ BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+
+ server->caps = server->nfs_client->caps;
+
+ /* probe the filesystem info for this server filesystem */
+ fsinfo.fattr = &fattr;
+ error = server->nfs_client->rpc_ops->fsinfo(server, fh, &fsinfo);
+ if (error < 0) {
+ nfs_free_server(server);
+ dprintk("<-- nfs_create_referral_server() = error %d\n", error);
+ return ERR_PTR(error);
+ }
+
+ dprintk("Referral FSID: %llx:%llx\n",
+ server->fsid.major, server->fsid.minor);
+
+ spin_lock(&nfs_client_lock);
+ list_add_tail(&server->client_link, &server->nfs_client->superblocks);
+ list_add_tail(&server->master_link, &nfs_volume_list);
+ spin_unlock(&nfs_client_lock);
+
+ server->maxfilesize = fsinfo.maxfilesize;
+ server->mount_time = jiffies;
+
+ dprintk("<-- nfs_create_referral_server() = %p\n", server);
+ return server;
+
+error:
+ nfs_free_server(server);
+ dprintk("<-- nfs4_create_referral_server() = error %d\n", error);
+ return ERR_PTR(error);
+}
+
+#endif /* CONFIG_NFS_V4 */
+
+/*
+ * Clone an NFS2, NFS3 or NFS4 server record
+ */
+struct nfs_server *nfs_clone_server(struct nfs_server *source,
+ struct nfs_fh *fh,
+ struct nfs_fattr *fattr)
+{
+ struct nfs_server *server;
+ struct nfs_fsinfo fsinfo;
+ int error;
+
+ dprintk("--> nfs_clone_server(,%llx:%llx,)\n",
+ fattr->fsid.major, fattr->fsid.minor);
+
+ server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
+ if (!server)
+ return ERR_PTR(-ENOMEM);
+
+ memcpy(server, source, sizeof(*server));
+
+ server->io_stats = nfs_alloc_iostats();
+ if (!server->io_stats) {
+ kfree(server);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ INIT_LIST_HEAD(&server->client_link);
+ INIT_LIST_HEAD(&server->master_link);
+ atomic_inc(&server->nfs_client->usage);
+ server->fsid = fattr->fsid;
+
+ /* probe the filesystem info for this server filesystem */
+ fsinfo.fattr = fattr;
+ error = server->nfs_client->rpc_ops->fsinfo(server, fh, &fsinfo);
+ if (error < 0) {
+ nfs_free_server(server);
+ dprintk("<-- nfs_clone_server() = error %d\n", error);
+ return ERR_PTR(error);
+ }
+
+ dprintk("Cloned FSID: %llx:%llx\n",
+ server->fsid.major, server->fsid.minor);
+
+ spin_lock(&nfs_client_lock);
+ list_add_tail(&server->client_link, &server->nfs_client->superblocks);
+ list_add_tail(&server->master_link, &nfs_volume_list);
+ spin_unlock(&nfs_client_lock);
+
+ server->maxfilesize = fsinfo.maxfilesize;
+ server->mount_time = jiffies;
+
+ dprintk("<-- nfs_clone_server() = %p\n", server);
+ return server;
+}
+
+#ifdef CONFIG_PROC_FS
+static struct proc_dir_entry *proc_fs_nfs;
+
+static int nfs_client_list_open(struct inode *inode, struct file *file);
+static void *nfs_client_list_start(struct seq_file *p, loff_t *pos);
+static void *nfs_client_list_next(struct seq_file *p, void *v, loff_t *pos);
+static void nfs_client_list_stop(struct seq_file *p, void *v);
+static int nfs_client_list_show(struct seq_file *m, void *v);
+
+static struct seq_operations nfs_client_list_ops = {
+ .start = nfs_client_list_start,
+ .next = nfs_client_list_next,
+ .stop = nfs_client_list_stop,
+ .show = nfs_client_list_show,
+};
+
+static struct file_operations nfs_client_list_fops = {
+ .open = nfs_client_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int nfs_volume_list_open(struct inode *inode, struct file *file);
+static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
+static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
+static void nfs_volume_list_stop(struct seq_file *p, void *v);
+static int nfs_volume_list_show(struct seq_file *m, void *v);
+
+static struct seq_operations nfs_volume_list_ops = {
+ .start = nfs_volume_list_start,
+ .next = nfs_volume_list_next,
+ .stop = nfs_volume_list_stop,
+ .show = nfs_volume_list_show,
+};
+
+static struct file_operations nfs_volume_list_fops = {
+ .open = nfs_volume_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * open "/proc/fs/nfsfs/clients" which provides a summary of extant clients
+ */
+static int nfs_client_list_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *m;
+ int ret;
+
+ ret = seq_open(file, &nfs_client_list_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+ m->private = PDE(inode)->data;
+
+ return 0;
+}
+
+/*
+ * set up the iterator to start reading from the client list and return the first item
+ */
+static void *nfs_client_list_start(struct seq_file *m, loff_t *_pos)
+{
+ struct list_head *_p;
+ loff_t pos = *_pos;
+
+ /* lock the list against modification */
+ spin_lock(&nfs_client_lock);
+
+ /* allow for the header line */
+ if (!pos)
+ return SEQ_START_TOKEN;
+ pos--;
+
+ /* find the n'th element in the list */
+ list_for_each(_p, &nfs_client_list)
+ if (!pos--)
+ break;
+
+ return _p != &nfs_client_list ? _p : NULL;
+}
+
+/*
+ * move to next client
+ */
+static void *nfs_client_list_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct list_head *_p;
+
+ (*pos)++;
+
+ _p = v;
+ _p = (v == SEQ_START_TOKEN) ? nfs_client_list.next : _p->next;
+
+ return _p != &nfs_client_list ? _p : NULL;
+}
+
+/*
+ * clean up after reading from the transports list
+ */
+static void nfs_client_list_stop(struct seq_file *p, void *v)
+{
+ spin_unlock(&nfs_client_lock);
+}
+
+/*
+ * display a header line followed by a load of call lines
+ */
+static int nfs_client_list_show(struct seq_file *m, void *v)
+{
+ struct nfs_client *clp;
+ const char *auth;
+
+ /* display header on line 1 */
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(m, "NV SERVER PORT USE AUTH HOSTNAME\n");
+ return 0;
+ }
+
+ /* display one transport per line on subsequent lines */
+ clp = list_entry(v, struct nfs_client, share_link);
+
+ auth = "?";
+ if (clp->authflavour < RPC_AUTH_MAXFLAVOR &&
+ nfs_auth_flavours[clp->authflavour])
+ auth = nfs_auth_flavours[clp->authflavour];
+
+ seq_printf(m, "v%d %02x%02x%02x%02x %4hx %3d %s %s\n",
+ clp->nfsversion,
+ NIPQUAD(clp->addr.sin_addr),
+ ntohs(clp->addr.sin_port),
+ atomic_read(&clp->usage),
+ auth,
+ clp->hostname);
+
+ return 0;
+}
+
+/*
+ * open "/proc/fs/nfsfs/volumes" which provides a summary of extant volumes
+ */
+static int nfs_volume_list_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *m;
+ int ret;
+
+ ret = seq_open(file, &nfs_volume_list_ops);
+ if (ret < 0)
+ return ret;
+
+ m = file->private_data;
+ m->private = PDE(inode)->data;
+
+ return 0;
+}
+
+/*
+ * set up the iterator to start reading from the volume list and return the first item
+ */
+static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
+{
+ struct list_head *_p;
+ loff_t pos = *_pos;
+
+ /* lock the list against modification */
+ spin_lock(&nfs_client_lock);
+
+ /* allow for the header line */
+ if (!pos)
+ return SEQ_START_TOKEN;
+ pos--;
+
+ /* find the n'th element in the list */
+ list_for_each(_p, &nfs_volume_list)
+ if (!pos--)
+ break;
+
+ return _p != &nfs_volume_list ? _p : NULL;
+}
+
+/*
+ * move to next volume
+ */
+static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct list_head *_p;
+
+ (*pos)++;
+
+ _p = v;
+ _p = (v == SEQ_START_TOKEN) ? nfs_volume_list.next : _p->next;
+
+ return _p != &nfs_volume_list ? _p : NULL;
+}
+
+/*
+ * clean up after reading from the transports list
+ */
+static void nfs_volume_list_stop(struct seq_file *p, void *v)
+{
+ spin_unlock(&nfs_client_lock);
+}
+
+/*
+ * display a header line followed by a load of call lines
+ */
+static int nfs_volume_list_show(struct seq_file *m, void *v)
+{
+ struct nfs_server *server;
+ struct nfs_client *clp;
+ char dev[8], fsid[17];
+
+ /* display header on line 1 */
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(m, "NV SERVER PORT DEV FSID\n");
+ return 0;
+ }
+ /* display one transport per line on subsequent lines */
+ server = list_entry(v, struct nfs_server, master_link);
+ clp = server->nfs_client;
+
+ snprintf(dev, 8, "%u:%u",
+ MAJOR(server->s_dev), MINOR(server->s_dev));
+
+ snprintf(fsid, 17, "%llx:%llx",
+ server->fsid.major, server->fsid.minor);
+
+ seq_printf(m, "v%d %02x%02x%02x%02x %4hx %-7s %-17s\n",
+ clp->nfsversion,
+ NIPQUAD(clp->addr.sin_addr),
+ ntohs(clp->addr.sin_port),
+ dev,
+ fsid);
+
+ return 0;
+}
+
+/*
+ * initialise the /proc/fs/nfsfs/ directory
+ */
+int __init nfs_fs_proc_init(void)
+{
+ struct proc_dir_entry *p;
+
+ proc_fs_nfs = proc_mkdir("nfsfs", proc_root_fs);
+ if (!proc_fs_nfs)
+ goto error_0;
+
+ proc_fs_nfs->owner = THIS_MODULE;
+
+ p = create_proc_entry("clients", S_IFREG|S_IRUGO, proc_fs_nfs);
+ if (!p)
+ goto error_1;
+
+ p->proc_fops = &nfs_client_list_fops;
+ p->owner = THIS_MODULE;
+
+ p = create_proc_entry("volumes", S_IFREG|S_IRUGO, proc_fs_nfs);
+ if (!p)
+ goto error_2;
+
+ p->proc_fops = &nfs_volume_list_fops;
+ p->owner = THIS_MODULE;
+ return 0;
+
+error_2:
+ remove_proc_entry("clients", proc_fs_nfs);
+error_1:
+ remove_proc_entry("nfsfs", proc_root_fs);
+error_0:
+ return -ENOMEM;
+}
+
+/*
+ * clean up the /proc/fs/nfsfs/ directory
+ */
+void __exit nfs_fs_proc_exit(void)
+{
+ remove_proc_entry("volumes", proc_fs_nfs);
+ remove_proc_entry("clients", proc_fs_nfs);
+ remove_proc_entry("nfsfs", proc_root_fs);
+}
+
+#endif /* CONFIG_PROC_FS */
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index d3be923..6d2cf78 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -19,6 +19,7 @@ #include <linux/nfs_xdr.h>
#include "nfs4_fs.h"
#include "delegation.h"
+#include "internal.h"
static struct nfs_delegation *nfs_alloc_delegation(void)
{
@@ -53,7 +54,7 @@ static int nfs_delegation_claim_locks(st
case -NFS4ERR_EXPIRED:
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
case -NFS4ERR_STALE_CLIENTID:
- nfs4_schedule_state_recovery(NFS_SERVER(inode)->nfs4_state);
+ nfs4_schedule_state_recovery(NFS_SCLIENT(inode));
goto out_err;
}
}
@@ -115,7 +116,7 @@ void nfs_inode_reclaim_delegation(struct
*/
int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res)
{
- struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
+ struct nfs_client *clp = NFS_SCLIENT(inode);
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_delegation *delegation;
int status = 0;
@@ -146,7 +147,7 @@ int nfs_inode_set_delegation(struct inod
sizeof(delegation->stateid)) != 0 ||
delegation->type != nfsi->delegation->type) {
printk("%s: server %u.%u.%u.%u, handed out a duplicate delegation!\n",
- __FUNCTION__, NIPQUAD(clp->cl_addr));
+ __FUNCTION__, NIPQUAD(clp->addr.sin_addr));
status = -EIO;
}
}
@@ -177,7 +178,7 @@ static void nfs_msync_inode(struct inode
*/
int __nfs_inode_return_delegation(struct inode *inode)
{
- struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
+ struct nfs_client *clp = NFS_SCLIENT(inode);
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_delegation *delegation;
int res = 0;
@@ -209,7 +210,7 @@ int __nfs_inode_return_delegation(struct
*/
void nfs_return_all_delegations(struct super_block *sb)
{
- struct nfs4_client *clp = NFS_SB(sb)->nfs4_state;
+ struct nfs_client *clp = NFS_SB(sb)->nfs_client;
struct nfs_delegation *delegation;
struct inode *inode;
@@ -233,7 +234,7 @@ restart:
int nfs_do_expire_all_delegations(void *ptr)
{
- struct nfs4_client *clp = ptr;
+ struct nfs_client *clp = ptr;
struct nfs_delegation *delegation;
struct inode *inode;
@@ -255,11 +256,11 @@ restart:
}
out:
spin_unlock(&clp->cl_lock);
- nfs4_put_client(clp);
+ nfs_put_client(clp);
module_put_and_exit(0);
}
-void nfs_expire_all_delegations(struct nfs4_client *clp)
+void nfs_expire_all_delegations(struct nfs_client *clp)
{
struct task_struct *task;
@@ -267,17 +268,17 @@ void nfs_expire_all_delegations(struct n
atomic_inc(&clp->cl_count);
task = kthread_run(nfs_do_expire_all_delegations, clp,
"%u.%u.%u.%u-delegreturn",
- NIPQUAD(clp->cl_addr));
+ NIPQUAD(clp->addr.sin_addr));
if (!IS_ERR(task))
return;
- nfs4_put_client(clp);
+ nfs_put_client(clp);
module_put(THIS_MODULE);
}
/*
* Return all delegations following an NFS4ERR_CB_PATH_DOWN error.
*/
-void nfs_handle_cb_pathdown(struct nfs4_client *clp)
+void nfs_handle_cb_pathdown(struct nfs_client *clp)
{
struct nfs_delegation *delegation;
struct inode *inode;
@@ -300,7 +301,7 @@ restart:
struct recall_threadargs {
struct inode *inode;
- struct nfs4_client *clp;
+ struct nfs_client *clp;
const nfs4_stateid *stateid;
struct completion started;
@@ -311,7 +312,7 @@ static int recall_thread(void *data)
{
struct recall_threadargs *args = (struct recall_threadargs *)data;
struct inode *inode = igrab(args->inode);
- struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
+ struct nfs_client *clp = NFS_SCLIENT(inode);
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_delegation *delegation;
@@ -372,7 +373,7 @@ out_module_put:
/*
* Retrieve the inode associated with a delegation
*/
-struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nfs_fh *fhandle)
+struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle)
{
struct nfs_delegation *delegation;
struct inode *res = NULL;
@@ -390,7 +391,7 @@ struct inode *nfs_delegation_find_inode(
/*
* Mark all delegations as needing to be reclaimed
*/
-void nfs_delegation_mark_reclaim(struct nfs4_client *clp)
+void nfs_delegation_mark_reclaim(struct nfs_client *clp)
{
struct nfs_delegation *delegation;
spin_lock(&clp->cl_lock);
@@ -402,7 +403,7 @@ void nfs_delegation_mark_reclaim(struct
/*
* Reap all unclaimed delegations after reboot recovery is done
*/
-void nfs_delegation_reap_unclaimed(struct nfs4_client *clp)
+void nfs_delegation_reap_unclaimed(struct nfs_client *clp)
{
struct nfs_delegation *delegation, *n;
LIST_HEAD(head);
@@ -424,7 +425,7 @@ void nfs_delegation_reap_unclaimed(struc
int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode)
{
- struct nfs4_client *clp = NFS_SERVER(inode)->nfs4_state;
+ struct nfs_client *clp = NFS_SCLIENT(inode);
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_delegation *delegation;
int res = 0;
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index 3858694..2cfd4b2 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -29,13 +29,13 @@ void nfs_inode_reclaim_delegation(struct
int __nfs_inode_return_delegation(struct inode *inode);
int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
-struct inode *nfs_delegation_find_inode(struct nfs4_client *clp, const struct nfs_fh *fhandle);
+struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle);
void nfs_return_all_delegations(struct super_block *sb);
-void nfs_expire_all_delegations(struct nfs4_client *clp);
-void nfs_handle_cb_pathdown(struct nfs4_client *clp);
+void nfs_expire_all_delegations(struct nfs_client *clp);
+void nfs_handle_cb_pathdown(struct nfs_client *clp);
-void nfs_delegation_mark_reclaim(struct nfs4_client *clp);
-void nfs_delegation_reap_unclaimed(struct nfs4_client *clp);
+void nfs_delegation_mark_reclaim(struct nfs_client *clp);
+void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
/* NFSv4 delegation-related procedures */
int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid);
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 2ab69cf..4353928 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -31,6 +31,7 @@ #include <linux/nfs_mount.h>
#include <linux/pagemap.h>
#include <linux/smp_lock.h>
#include <linux/namei.h>
+#include <linux/mount.h>
#include "nfs4_fs.h"
#include "delegation.h"
@@ -182,7 +183,7 @@ int nfs_readdir_filler(nfs_readdir_descr
again:
timestamp = jiffies;
error = NFS_PROTO(inode)->readdir(file->f_dentry, cred, desc->entry->cookie, page,
- NFS_SERVER(inode)->dtsize, desc->plus);
+ NFS_SCLIENT(inode)->dtsize, desc->plus);
if (error < 0) {
/* We requested READDIRPLUS, but the server doesn't grok it */
if (error == -ENOTSUPP && desc->plus) {
@@ -475,7 +476,7 @@ int uncached_readdir(nfs_readdir_descrip
}
desc->error = NFS_PROTO(inode)->readdir(file->f_dentry, cred, *desc->dir_cookie,
page,
- NFS_SERVER(inode)->dtsize,
+ NFS_SCLIENT(inode)->dtsize,
desc->plus);
spin_lock(&inode->i_lock);
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
@@ -690,7 +691,7 @@ int nfs_lookup_verify_inode(struct inode
goto out_force;
/* This is an open(2) */
if (nfs_lookup_check_intent(nd, LOOKUP_OPEN) != 0 &&
- !(server->flags & NFS_MOUNT_NOCTO))
+ !(server->nfs_client->flags & NFS_MOUNT_NOCTO))
goto out_force;
}
return nfs_revalidate_inode(server, inode);
@@ -868,14 +869,14 @@ int nfs_is_exclusive_create(struct inode
return (nd->intent.open.flags & O_EXCL) != 0;
}
-static inline int nfs_reval_fsid(struct inode *dir,
- struct nfs_fh *fh, struct nfs_fattr *fattr)
+static inline int nfs_reval_fsid(struct vfsmount *mnt, struct inode *dir,
+ struct nfs_fh *fh, struct nfs_fattr *fattr)
{
struct nfs_server *server = NFS_SERVER(dir);
if (!nfs_fsid_equal(&server->fsid, &fattr->fsid))
/* Revalidate fsid on root dir */
- return __nfs_revalidate_inode(server, dir->i_sb->s_root->d_inode);
+ return __nfs_revalidate_inode(server, mnt->mnt_root->d_inode);
return 0;
}
@@ -892,7 +893,7 @@ static struct dentry *nfs_lookup(struct
nfs_inc_stats(dir, NFSIOS_VFSLOOKUP);
res = ERR_PTR(-ENAMETOOLONG);
- if (dentry->d_name.len > NFS_SERVER(dir)->namelen)
+ if (dentry->d_name.len > NFS_SCLIENT(dir)->namelen)
goto out;
res = ERR_PTR(-ENOMEM);
@@ -911,7 +912,7 @@ static struct dentry *nfs_lookup(struct
res = ERR_PTR(error);
goto out_unlock;
}
- error = nfs_reval_fsid(dir, &fhandle, &fattr);
+ error = nfs_reval_fsid(nd->mnt, dir, &fhandle, &fattr);
if (error < 0) {
res = ERR_PTR(error);
goto out_unlock;
@@ -920,8 +921,9 @@ static struct dentry *nfs_lookup(struct
res = (struct dentry *)inode;
if (IS_ERR(res))
goto out_unlock;
+
no_entry:
- res = d_add_unique(dentry, inode);
+ res = d_materialise_unique(dentry, inode);
if (res != NULL)
dentry = res;
nfs_renew_times(dentry);
@@ -970,7 +972,7 @@ static struct dentry *nfs_atomic_lookup(
if (!is_atomic_open(dir, nd))
goto no_open;
- if (dentry->d_name.len > NFS_SERVER(dir)->namelen) {
+ if (dentry->d_name.len > NFS_SCLIENT(dir)->namelen) {
res = ERR_PTR(-ENAMETOOLONG);
goto out;
}
@@ -1115,11 +1117,13 @@ static struct dentry *nfs_readdir_lookup
dput(dentry);
return NULL;
}
- alias = d_add_unique(dentry, inode);
+
+ alias = d_materialise_unique(dentry, inode);
if (alias != NULL) {
dput(dentry);
dentry = alias;
}
+
nfs_renew_times(dentry);
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
return dentry;
@@ -1145,7 +1149,7 @@ int nfs_instantiate(struct dentry *dentr
}
if (!(fattr->valid & NFS_ATTR_FATTR)) {
struct nfs_server *server = NFS_SB(dentry->d_sb);
- error = server->rpc_ops->getattr(server, fhandle, fattr);
+ error = server->nfs_client->rpc_ops->getattr(server, fhandle, fattr);
if (error < 0)
goto out_err;
}
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 402005c..01e8f10 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -328,7 +328,7 @@ static void nfs_direct_read_schedule(str
struct page **pages = dreq->pages;
size_t count = dreq->user_count;
loff_t pos = dreq->pos;
- size_t rsize = NFS_SERVER(inode)->rsize;
+ size_t rsize = NFS_SCLIENT(inode)->rsize;
unsigned int curpage, pgbase;
curpage = 0;
@@ -392,7 +392,7 @@ static ssize_t nfs_direct_read(struct ki
struct rpc_clnt *clnt = NFS_CLIENT(inode);
struct nfs_direct_req *dreq;
- dreq = nfs_direct_read_alloc(count, NFS_SERVER(inode)->rsize);
+ dreq = nfs_direct_read_alloc(count, NFS_SCLIENT(inode)->rsize);
if (!dreq)
return -ENOMEM;
@@ -647,7 +647,7 @@ static void nfs_direct_write_schedule(st
struct page **pages = dreq->pages;
size_t count = dreq->user_count;
loff_t pos = dreq->pos;
- size_t wsize = NFS_SERVER(inode)->wsize;
+ size_t wsize = NFS_SCLIENT(inode)->wsize;
unsigned int curpage, pgbase;
curpage = 0;
@@ -711,7 +711,7 @@ static ssize_t nfs_direct_write(struct k
struct inode *inode = iocb->ki_filp->f_mapping->host;
struct rpc_clnt *clnt = NFS_CLIENT(inode);
struct nfs_direct_req *dreq;
- size_t wsize = NFS_SERVER(inode)->wsize;
+ size_t wsize = NFS_SCLIENT(inode)->wsize;
int sync = 0;
dreq = nfs_direct_write_alloc(count, wsize);
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index fade02c..8a89a70 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -111,7 +111,7 @@ nfs_file_open(struct inode *inode, struc
nfs_inc_stats(inode, NFSIOS_VFSOPEN);
lock_kernel();
- res = NFS_SERVER(inode)->rpc_ops->file_open(inode, filp);
+ res = NFS_SCLIENT(inode)->rpc_ops->file_open(inode, filp);
unlock_kernel();
return res;
}
@@ -159,7 +159,7 @@ static int nfs_revalidate_file_size(stru
struct nfs_server *server = NFS_SERVER(inode);
struct nfs_inode *nfsi = NFS_I(inode);
- if (server->flags & NFS_MOUNT_NOAC)
+ if (server->nfs_client->flags & NFS_MOUNT_NOAC)
goto force_reval;
if (filp->f_flags & O_DIRECT)
goto force_reval;
@@ -408,7 +408,7 @@ static int do_getlk(struct file *filp, i
if (nfs_have_delegation(inode, FMODE_READ))
goto out_noconflict;
- if (NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM)
+ if (NFS_SCLIENT(inode)->flags & NFS_MOUNT_NONLM)
goto out_noconflict;
status = NFS_PROTO(inode)->lock(filp, cmd, fl);
@@ -456,7 +456,7 @@ static int do_unlk(struct file *filp, in
*/
lock_kernel();
/* Use local locking if mounted with "-onolock" */
- if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM))
+ if (!(NFS_SCLIENT(inode)->flags & NFS_MOUNT_NONLM))
status = NFS_PROTO(inode)->lock(filp, cmd, fl);
else
status = do_vfs_lock(filp, fl);
@@ -479,7 +479,7 @@ static int do_setlk(struct file *filp, i
lock_kernel();
/* Use local locking if mounted with "-onolock" */
- if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM)) {
+ if (!(NFS_SCLIENT(inode)->flags & NFS_MOUNT_NONLM)) {
status = NFS_PROTO(inode)->lock(filp, cmd, fl);
/* If we were signalled we still need to ensure that
* we clean up any state on the server. We therefore
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
new file mode 100644
index 0000000..977e590
--- /dev/null
+++ b/fs/nfs/getroot.c
@@ -0,0 +1,306 @@
+/* getroot.c: get the root dentry for an NFS mount
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells at redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/stats.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_mount.h>
+#include <linux/nfs4_mount.h>
+#include <linux/lockd/bind.h>
+#include <linux/smp_lock.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
+#include <linux/nfs_idmap.h>
+#include <linux/vfs.h>
+#include <linux/namei.h>
+#include <linux/namespace.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include "nfs4_fs.h"
+#include "delegation.h"
+#include "internal.h"
+
+#define NFSDBG_FACILITY NFSDBG_CLIENT
+#define NFS_PARANOIA 1
+
+/*
+ * get an NFS2/NFS3 root dentry from the root filehandle
+ */
+struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh)
+{
+ struct nfs_server *server = NFS_SB(sb);
+ struct nfs_fsinfo fsinfo;
+ struct nfs_fattr fattr;
+ struct dentry *mntroot;
+ struct inode *inode;
+ int error;
+
+ /* create a dummy root dentry with dummy inode for this superblock */
+ if (!sb->s_root) {
+ struct nfs_fh dummyfh;
+ struct dentry *root;
+ struct inode *iroot;
+
+ memset(&dummyfh, 0, sizeof(dummyfh));
+ memset(&fattr, 0, sizeof(fattr));
+ nfs_fattr_init(&fattr);
+ fattr.valid = NFS_ATTR_FATTR;
+ fattr.type = NFDIR;
+ fattr.mode = S_IFDIR | S_IRUSR | S_IWUSR;
+ fattr.nlink = 2;
+
+ iroot = nfs_fhget(sb, &dummyfh, &fattr);
+ if (IS_ERR(iroot))
+ return ERR_PTR(PTR_ERR(iroot));
+
+ root = d_alloc_root(iroot);
+ if (!root) {
+ iput(iroot);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ sb->s_root = root;
+ }
+
+ /* get the actual root for this mount */
+ fsinfo.fattr = &fattr;
+
+ error = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo);
+ if (error < 0) {
+ dprintk("nfs_get_root: getattr error = %d\n", -error);
+ return ERR_PTR(error);
+ }
+
+ inode = nfs_fhget(sb, mntfh, fsinfo.fattr);
+ if (IS_ERR(inode)) {
+ dprintk("nfs_get_root: get root inode failed\n");
+ return ERR_PTR(PTR_ERR(inode));
+ }
+
+ /* root dentries normally start off anonymous and get spliced in later
+ * if the dentry tree reaches them; however if the dentry already
+ * exists, we'll pick it up at this point and use it as the root
+ */
+ mntroot = d_alloc_anon(inode);
+ if (!mntroot) {
+ iput(inode);
+ dprintk("nfs_get_root: get root dentry failed\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ if (!mntroot->d_op)
+ mntroot->d_op = server->nfs_client->rpc_ops->dentry_ops;
+
+ return mntroot;
+}
+
+#ifdef CONFIG_NFS_V4
+
+/*
+ * Do a simple pathwalk from the root FH of the server to the nominated target
+ * of the mountpoint
+ * - give error on symlinks
+ * - give error on ".." occurring in the path
+ * - follow traversals
+ */
+int nfs4_path_walk(struct nfs_server *server,
+ struct nfs_fh *mntfh,
+ const char *path)
+{
+ struct nfs_fsinfo fsinfo;
+ struct nfs_fattr fattr;
+ struct nfs_fh lastfh;
+ struct qstr name;
+ int ret;
+ //int referral_count = 0;
+
+ dprintk("--> nfs4_path_walk(,,%s)\n", path);
+
+ fsinfo.fattr = &fattr;
+ nfs_fattr_init(&fattr);
+
+ if (*path++ != '/') {
+ dprintk("nfs4_get_root: Path does not begin with a slash\n");
+ return -EINVAL;
+ }
+
+ /* Start by getting the root filehandle from the server */
+ ret = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo);
+ if (ret < 0) {
+ dprintk("nfs4_get_root: getroot error = %d\n", -ret);
+ return ret;
+ }
+
+ if (fattr.type != NFDIR) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " getroot encountered non-directory\n");
+ return -ENOTDIR;
+ }
+
+ if (fattr.valid & NFS_ATTR_FATTR_V4_REFERRAL) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " getroot obtained referral\n");
+ return -EREMOTE;
+ }
+
+next_component:
+ dprintk("Next: %s\n", path);
+
+ /* extract the next bit of the path */
+ if (!*path)
+ goto path_walk_complete;
+
+ name.name = path;
+ while (*path && *path != '/')
+ path++;
+ name.len = path - (const char *) name.name;
+
+eat_dot_dir:
+ while (*path == '/')
+ path++;
+
+ if (path[0] == '.' && (path[1] == '/' || !path[1])) {
+ path += 2;
+ goto eat_dot_dir;
+ }
+
+ if (path[0] == '.' && path[1] == '.' && (path[2] == '/' || !path[2])
+ ) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " Mount path contains reference to \"..\"\n");
+ return -EINVAL;
+ }
+
+ /* lookup the next FH in the sequence */
+ memcpy(&lastfh, mntfh, sizeof(lastfh));
+
+ dprintk("LookupFH: %*.*s [%s]\n", name.len, name.len, name.name, path);
+
+ ret = server->nfs_client->rpc_ops->lookupfh(server, &lastfh, &name,
+ mntfh, &fattr);
+ if (ret < 0) {
+ dprintk("nfs4_get_root: getroot error = %d\n", -ret);
+ return ret;
+ }
+
+ if (fattr.type != NFDIR) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " lookupfh encountered non-directory\n");
+ return -ENOTDIR;
+ }
+
+ if (fattr.valid & NFS_ATTR_FATTR_V4_REFERRAL) {
+ printk(KERN_ERR "nfs4_get_root:"
+ " lookupfh obtained referral\n");
+ return -EREMOTE;
+ }
+
+ goto next_component;
+
+path_walk_complete:
+ memcpy(&server->fsid, &fattr.fsid, sizeof(server->fsid));
+ dprintk("<-- nfs4_path_walk() = 0\n");
+ return 0;
+}
+
+/*
+ * get an NFS4 root dentry from the root filehandle
+ */
+struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh)
+{
+ struct nfs_server *server = NFS_SB(sb);
+ struct nfs_fattr fattr;
+ struct dentry *mntroot;
+ struct inode *inode;
+ int error;
+
+ dprintk("--> nfs4_get_root()\n");
+
+ /* create a dummy root dentry with dummy inode for this superblock */
+ if (!sb->s_root) {
+ struct nfs_fh dummyfh;
+ struct dentry *root;
+ struct inode *iroot;
+
+ memset(&dummyfh, 0, sizeof(dummyfh));
+ memset(&fattr, 0, sizeof(fattr));
+ nfs_fattr_init(&fattr);
+ fattr.valid = NFS_ATTR_FATTR;
+ fattr.type = NFDIR;
+ fattr.mode = S_IFDIR | S_IRUSR | S_IWUSR;
+ fattr.nlink = 2;
+
+ iroot = nfs_fhget(sb, &dummyfh, &fattr);
+ if (IS_ERR(iroot))
+ return ERR_PTR(PTR_ERR(iroot));
+
+ root = d_alloc_root(iroot);
+ if (!root) {
+ iput(iroot);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ sb->s_root = root;
+ }
+
+ /* get the info about the server and filesystem */
+ error = nfs4_server_capabilities(server, mntfh);
+ if (error < 0) {
+ dprintk("nfs_get_root: getcaps error = %d\n",
+ -error);
+ return ERR_PTR(error);
+ }
+
+ /* get the actual root for this mount */
+ error = server->nfs_client->rpc_ops->getattr(server, mntfh, &fattr);
+ if (error < 0) {
+ dprintk("nfs_get_root: getattr error = %d\n", -error);
+ return ERR_PTR(error);
+ }
+
+ inode = nfs_fhget(sb, mntfh, &fattr);
+ if (IS_ERR(inode)) {
+ dprintk("nfs_get_root: get root inode failed\n");
+ return ERR_PTR(PTR_ERR(inode));
+ }
+
+ /* root dentries normally start off anonymous and get spliced in later
+ * if the dentry tree reaches them; however if the dentry already
+ * exists, we'll pick it up at this point and use it as the root
+ */
+ mntroot = d_alloc_anon(inode);
+ if (!mntroot) {
+ iput(inode);
+ dprintk("nfs_get_root: get root dentry failed\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ if (!mntroot->d_op)
+ mntroot->d_op = server->nfs_client->rpc_ops->dentry_ops;
+
+ dprintk("<-- nfs4_get_root()\n");
+ return mntroot;
+}
+
+#endif /* CONFIG_NFS_V4 */
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index dd461e6..77c4ce8 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -91,15 +91,16 @@ static struct rpc_pipe_ops idmap_upcall_
.destroy_msg = idmap_pipe_destroy_msg,
};
-void
-nfs_idmap_new(struct nfs4_client *clp)
+int
+nfs_idmap_new(struct nfs_client *clp)
{
struct idmap *idmap;
+ int error;
+
+ BUG_ON(clp->cl_idmap != NULL);
- if (clp->cl_idmap != NULL)
- return;
if ((idmap = kzalloc(sizeof(*idmap), GFP_KERNEL)) == NULL)
- return;
+ return -ENOMEM;
snprintf(idmap->idmap_path, sizeof(idmap->idmap_path),
"%s/idmap", clp->cl_rpcclient->cl_pathname);
@@ -107,8 +108,9 @@ nfs_idmap_new(struct nfs4_client *clp)
idmap->idmap_dentry = rpc_mkpipe(idmap->idmap_path,
idmap, &idmap_upcall_ops, 0);
if (IS_ERR(idmap->idmap_dentry)) {
+ error = PTR_ERR(idmap->idmap_dentry);
kfree(idmap);
- return;
+ return error;
}
mutex_init(&idmap->idmap_lock);
@@ -118,10 +120,11 @@ nfs_idmap_new(struct nfs4_client *clp)
idmap->idmap_group_hash.h_type = IDMAP_TYPE_GROUP;
clp->cl_idmap = idmap;
+ return 0;
}
void
-nfs_idmap_delete(struct nfs4_client *clp)
+nfs_idmap_delete(struct nfs_client *clp)
{
struct idmap *idmap = clp->cl_idmap;
@@ -476,27 +479,27 @@ static unsigned int fnvhash32(const void
return (hash);
}
-int nfs_map_name_to_uid(struct nfs4_client *clp, const char *name, size_t namelen, __u32 *uid)
+int nfs_map_name_to_uid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_id(idmap, &idmap->idmap_user_hash, name, namelen, uid);
}
-int nfs_map_group_to_gid(struct nfs4_client *clp, const char *name, size_t namelen, __u32 *uid)
+int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_id(idmap, &idmap->idmap_group_hash, name, namelen, uid);
}
-int nfs_map_uid_to_name(struct nfs4_client *clp, __u32 uid, char *buf)
+int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf);
}
-int nfs_map_gid_to_group(struct nfs4_client *clp, __u32 uid, char *buf)
+int nfs_map_gid_to_group(struct nfs_client *clp, __u32 uid, char *buf)
{
struct idmap *idmap = clp->cl_idmap;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 6dd6ed7..16d6ae6 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -257,13 +257,13 @@ nfs_fhget(struct super_block *sb, struct
/* Why so? Because we want revalidate for devices/FIFOs, and
* that's precisely what we have in nfs_file_inode_operations.
*/
- inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops;
+ inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
if (S_ISREG(inode->i_mode)) {
inode->i_fop = &nfs_file_operations;
inode->i_data.a_ops = &nfs_file_aops;
- inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
+ inode->i_data.backing_dev_info = &NFS_SB(sb)->nfs_client->backing_dev_info;
} else if (S_ISDIR(inode->i_mode)) {
- inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops;
+ inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
inode->i_fop = &nfs_dir_operations;
if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
&& fattr->size <= NFS_LIMIT_READDIRPLUS)
@@ -1041,7 +1041,7 @@ #endif
out_fileid:
printk(KERN_ERR "NFS: server %s error: fileid changed\n"
"fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
- NFS_SERVER(inode)->hostname, inode->i_sb->s_id,
+ NFS_SCLIENT(inode)->hostname, inode->i_sb->s_id,
(long long)nfsi->fileid, (long long)fattr->fileid);
goto out_err;
}
@@ -1162,6 +1162,10 @@ static int __init init_nfs_fs(void)
{
int err;
+ err = nfs_fs_proc_init();
+ if (err)
+ goto out5;
+
err = nfs_init_nfspagecache();
if (err)
goto out4;
@@ -1202,6 +1206,8 @@ out2:
out3:
nfs_destroy_nfspagecache();
out4:
+ nfs_fs_proc_exit();
+out5:
return err;
}
@@ -1216,6 +1222,7 @@ #ifdef CONFIG_PROC_FS
rpc_proc_unregister("nfs");
#endif
unregister_nfs_fs();
+ nfs_fs_proc_exit();
}
/* Not quite true; I just maintain it */
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index f588ea3..d52a273 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -4,6 +4,18 @@
#include <linux/mount.h>
+struct nfs_string;
+struct nfs_mount_data;
+struct nfs4_mount_data;
+
+/* Maximum number of readahead requests
+ * FIXME: this should really be a sysctl so that users may tune it to suit
+ * their needs. People that do NFS over a slow network, might for
+ * instance want to reduce it to something closer to 1 for improved
+ * interactive response.
+ */
+#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
+
struct nfs_clone_mount {
const struct super_block *sb;
const struct dentry *dentry;
@@ -15,6 +27,36 @@ struct nfs_clone_mount {
rpc_authflavor_t authflavor;
};
+/* client.c */
+extern struct rpc_program nfs_program;
+
+extern void nfs_put_client(struct nfs_client *);
+extern struct nfs_client *nfs_find_client(struct sockaddr_in *, int);
+extern struct nfs_server *nfs_create_server(struct nfs_mount_data *,
+ struct nfs_fh *);
+extern struct nfs_server *nfs4_create_server(struct nfs4_mount_data *, char *,
+ struct sockaddr_in *, char *,
+ char *, rpc_authflavor_t,
+ struct nfs_fh *);
+extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
+ struct nfs_fh *);
+extern void nfs_free_server(struct nfs_server *server);
+extern struct nfs_server *nfs_clone_server(struct nfs_server *,
+ struct nfs_fh *,
+ struct nfs_fattr *);
+#ifdef CONFIG_PROC_FS
+extern int __init nfs_fs_proc_init(void);
+extern void __exit nfs_fs_proc_exit(void);
+#else
+static inline int __init nfs_fs_proc_init(void)
+{
+ return 0;
+}
+static inline void __exit nfs_fs_proc_exit(void)
+{
+}
+#endif
+
/* nfs4namespace.c */
#ifdef CONFIG_NFS_V4
extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
@@ -48,19 +90,21 @@ #endif
/* nfs2xdr.c */
extern struct rpc_procinfo nfs_procedures[];
extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
+extern int nfs_stat_to_errno(int);
/* nfs3xdr.c */
extern struct rpc_procinfo nfs3_procedures[];
extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
/* nfs4xdr.c */
-extern int nfs_stat_to_errno(int);
+#ifdef CONFIG_NFS_V4
extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
+#endif
/* nfs4proc.c */
+#ifdef CONFIG_NFS_V4
extern struct rpc_procinfo nfs4_procedures[];
-#ifdef CONFIG_NFS_V4
extern int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
struct nfs4_fs_locations *fs_locations,
struct page *page);
@@ -77,10 +121,10 @@ extern void nfs4_clear_inode(struct inod
#endif
/* super.c */
-extern struct file_system_type nfs_referral_nfs4_fs_type;
-extern struct file_system_type clone_nfs_fs_type;
+extern struct file_system_type nfs_xdev_fs_type;
#ifdef CONFIG_NFS_V4
-extern struct file_system_type clone_nfs4_fs_type;
+extern struct file_system_type nfs4_xdev_fs_type;
+extern struct file_system_type nfs4_referral_fs_type;
#endif
#ifdef CONFIG_PROC_FS
extern struct rpc_stat nfs_rpcstat;
@@ -89,27 +133,35 @@ extern int __init register_nfs_fs(void);
extern void __exit unregister_nfs_fs(void);
/* namespace.c */
-extern char *nfs_path(const char *base, const struct dentry *dentry,
+extern char *nfs_path(const char *base,
+ const struct dentry *droot,
+ const struct dentry *dentry,
char *buffer, ssize_t buflen);
-/*
- * Determine the mount path as a string
- */
+/* getroot.c */
+typedef void (*nfs_set_params_func)(struct super_block *sb,
+ struct nfs_fsinfo *fsinfo);
+
+extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *);
+extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *);
+
+extern int nfs4_path_walk(struct nfs_server *server,
+ struct nfs_fh *mntfh,
+ const char *path);
+
#ifdef CONFIG_NFS_V4
-static inline char *nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen)
-{
- return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen);
-}
+extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *);
#endif
/*
* Determine the device name as a string
*/
static inline char *nfs_devname(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
- char *buffer, ssize_t buflen)
+ const struct dentry *dentry,
+ char *buffer, ssize_t buflen)
{
- return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen);
+ return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root,
+ dentry, buffer, buflen);
}
/*
@@ -165,20 +217,3 @@ void nfs_super_set_maxbytes(struct super
if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
sb->s_maxbytes = MAX_LFS_FILESIZE;
}
-
-/*
- * Check if the string represents a "valid" IPv4 address
- */
-static inline int valid_ipaddr4(const char *buf)
-{
- int rc, count, in[4];
-
- rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
- if (rc != 4)
- return -EINVAL;
- for (count = 0; count < 4; count++) {
- if (in[count] > 255)
- return -EINVAL;
- }
- return 0;
-}
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 19b98ca..271a95d 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -2,6 +2,7 @@
* linux/fs/nfs/namespace.c
*
* Copyright (C) 2005 Trond Myklebust <Trond.Myklebust at netapp.com>
+ * - Modified by David Howells <dhowells at redhat.com>
*
* NFS namespace
*/
@@ -28,6 +29,7 @@ int nfs_mountpoint_expiry_timeout = 500
/*
* nfs_path - reconstruct the path given an arbitrary dentry
* @base - arbitrary string to prepend to the path
+ * @droot - pointer to root dentry for mountpoint
* @dentry - pointer to dentry
* @buffer - result buffer
* @buflen - length of buffer
@@ -38,7 +40,9 @@ int nfs_mountpoint_expiry_timeout = 500
* This is mainly for use in figuring out the path on the
* server side when automounting on top of an existing partition.
*/
-char *nfs_path(const char *base, const struct dentry *dentry,
+char *nfs_path(const char *base,
+ const struct dentry *droot,
+ const struct dentry *dentry,
char *buffer, ssize_t buflen)
{
char *end = buffer+buflen;
@@ -47,7 +51,7 @@ char *nfs_path(const char *base, const s
*--end = '\0';
buflen--;
spin_lock(&dcache_lock);
- while (!IS_ROOT(dentry)) {
+ while (!IS_ROOT(dentry) && dentry != droot) {
namelen = dentry->d_name.len;
buflen -= namelen + 1;
if (buflen < 0)
@@ -94,15 +98,17 @@ static void * nfs_follow_mountpoint(stru
struct nfs_fattr fattr;
int err;
+ dprintk("--> nfs_follow_mountpoint()\n");
+
BUG_ON(IS_ROOT(dentry));
dprintk("%s: enter\n", __FUNCTION__);
dput(nd->dentry);
nd->dentry = dget(dentry);
- if (d_mountpoint(nd->dentry))
- goto out_follow;
+
/* Look it up again */
parent = dget_parent(nd->dentry);
- err = server->rpc_ops->lookup(parent->d_inode, &nd->dentry->d_name, &fh, &fattr);
+ err = server->nfs_client->rpc_ops->lookup(parent->d_inode, &nd->dentry->d_name,
+ &fh, &fattr);
dput(parent);
if (err != 0)
goto out_err;
@@ -130,6 +136,8 @@ static void * nfs_follow_mountpoint(stru
schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout);
out:
dprintk("%s: done, returned %d\n", __FUNCTION__, err);
+
+ dprintk("<-- nfs_follow_mountpoint() = %d\n", err);
return ERR_PTR(err);
out_err:
path_release(nd);
@@ -170,22 +178,23 @@ void nfs_release_automount_timer(void)
/*
* Clone a mountpoint of the appropriate type
*/
-static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname,
+static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server,
+ const char *devname,
struct nfs_clone_mount *mountdata)
{
#ifdef CONFIG_NFS_V4
struct vfsmount *mnt = NULL;
- switch (server->rpc_ops->version) {
+ switch (server->nfs_client->rpc_ops->version) {
case 2:
case 3:
- mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
+ mnt = vfs_kern_mount(&nfs_xdev_fs_type, 0, devname, mountdata);
break;
case 4:
- mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, mountdata);
+ mnt = vfs_kern_mount(&nfs4_xdev_fs_type, 0, devname, mountdata);
}
return mnt;
#else
- return vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
+ return vfs_kern_mount(&nfs_xdev_fs_type, 0, devname, mountdata);
#endif
}
@@ -211,6 +220,8 @@ struct vfsmount *nfs_do_submount(const s
char *page = (char *) __get_free_page(GFP_USER);
char *devname;
+ dprintk("--> nfs_do_submount()\n");
+
dprintk("%s: submounting on %s/%s\n", __FUNCTION__,
dentry->d_parent->d_name.name,
dentry->d_name.name);
@@ -225,5 +236,7 @@ free_page:
free_page((unsigned long)page);
out:
dprintk("%s: done\n", __FUNCTION__);
+
+ dprintk("<-- nfs_do_submount() = %p\n", mnt);
return mnt;
}
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 3328787..7580191 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -222,8 +222,8 @@ struct posix_acl *nfs3_proc_getacl(struc
return NULL;
dprintk("NFS call getacl\n");
- msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_GETACL];
- status = rpc_call_sync(server->client_acl, &msg, 0);
+ msg.rpc_proc = &server->nfs_client->client_acl->cl_procinfo[ACLPROC3_GETACL];
+ status = rpc_call_sync(server->nfs_client->client_acl, &msg, 0);
dprintk("NFS reply getacl: %d\n", status);
/* pages may have been allocated at the xdr layer. */
@@ -314,8 +314,8 @@ static int nfs3_proc_setacls(struct inod
dprintk("NFS call setacl\n");
nfs_begin_data_update(inode);
- msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_SETACL];
- status = rpc_call_sync(server->client_acl, &msg, 0);
+ msg.rpc_proc = &server->nfs_client->client_acl->cl_procinfo[ACLPROC3_SETACL];
+ status = rpc_call_sync(server->nfs_client->client_acl, &msg, 0);
spin_lock(&inode->i_lock);
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS;
spin_unlock(&inode->i_lock);
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 7143b1f..e8d6d7f 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -81,7 +81,7 @@ do_proc_get_root(struct rpc_clnt *client
}
/*
- * Bare-bones access to getattr: this is for nfs_read_super.
+ * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
*/
static int
nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
@@ -89,9 +89,9 @@ nfs3_proc_get_root(struct nfs_server *se
{
int status;
- status = do_proc_get_root(server->client, fhandle, info);
- if (status && server->client_sys != server->client)
- status = do_proc_get_root(server->client_sys, fhandle, info);
+ status = do_proc_get_root(server->nfs_client->client, fhandle, info);
+ if (status && server->nfs_client->client_sys != server->nfs_client->client)
+ status = do_proc_get_root(server->nfs_client->client_sys, fhandle, info);
return status;
}
@@ -111,7 +111,7 @@ nfs3_proc_getattr(struct nfs_server *ser
dprintk("NFS call getattr\n");
nfs_fattr_init(fattr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
dprintk("NFS reply getattr: %d\n", status);
return status;
}
@@ -767,7 +767,7 @@ nfs3_proc_statfs(struct nfs_server *serv
dprintk("NFS call fsstat\n");
nfs_fattr_init(stat->fattr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
dprintk("NFS reply statfs: %d\n", status);
return status;
}
@@ -785,7 +785,7 @@ nfs3_proc_fsinfo(struct nfs_server *serv
dprintk("NFS call fsinfo\n");
nfs_fattr_init(info->fattr);
- status = rpc_call_sync(server->client_sys, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client_sys, &msg, 0);
dprintk("NFS reply fsinfo: %d\n", status);
return status;
}
@@ -803,7 +803,7 @@ nfs3_proc_pathconf(struct nfs_server *se
dprintk("NFS call pathconf\n");
nfs_fattr_init(info->fattr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
dprintk("NFS reply pathconf: %d\n", status);
return status;
}
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 9a10286..72a132c 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -42,6 +42,7 @@ enum nfs4_client_state {
NFS4CLNT_LEASE_EXPIRED,
};
+#if 0
/*
* The nfs4_client identifies our client state to the server.
*/
@@ -90,6 +91,7 @@ struct nfs4_client {
char cl_ipaddr[16];
unsigned char cl_id_uniquifier;
};
+#endif
/*
* struct rpc_sequence ensures that RPC calls are sent in the exact
@@ -127,7 +129,7 @@ static inline void nfs_confirm_seqid(str
struct nfs4_state_owner {
spinlock_t so_lock;
struct list_head so_list; /* per-clientid list of state_owners */
- struct nfs4_client *so_client;
+ struct nfs_client *so_client;
u32 so_id; /* 32-bit identifier, unique */
atomic_t so_count;
@@ -210,10 +212,10 @@ extern ssize_t nfs4_listxattr(struct den
/* nfs4proc.c */
extern int nfs4_map_errors(int err);
-extern int nfs4_proc_setclientid(struct nfs4_client *, u32, unsigned short, struct rpc_cred *);
-extern int nfs4_proc_setclientid_confirm(struct nfs4_client *, struct rpc_cred *);
-extern int nfs4_proc_async_renew(struct nfs4_client *, struct rpc_cred *);
-extern int nfs4_proc_renew(struct nfs4_client *, struct rpc_cred *);
+extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *);
+extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct rpc_cred *);
+extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
+extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
extern int nfs4_do_close(struct inode *inode, struct nfs4_state *state);
extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
@@ -231,19 +233,14 @@ extern const u32 nfs4_fsinfo_bitmap[2];
extern const u32 nfs4_fs_locations_bitmap[2];
/* nfs4renewd.c */
-extern void nfs4_schedule_state_renewal(struct nfs4_client *);
+extern void nfs4_schedule_state_renewal(struct nfs_client *);
extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
-extern void nfs4_kill_renewd(struct nfs4_client *);
+extern void nfs4_kill_renewd(struct nfs_client *);
extern void nfs4_renew_state(void *);
/* nfs4state.c */
-extern void init_nfsv4_state(struct nfs_server *);
-extern void destroy_nfsv4_state(struct nfs_server *);
-extern struct nfs4_client *nfs4_get_client(struct in_addr *);
-extern void nfs4_put_client(struct nfs4_client *clp);
-extern struct nfs4_client *nfs4_find_client(struct in_addr *);
-struct rpc_cred *nfs4_get_renew_cred(struct nfs4_client *clp);
-extern u32 nfs4_alloc_lockowner_id(struct nfs4_client *);
+struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp);
+extern u32 nfs4_alloc_lockowner_id(struct nfs_client *);
extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
extern void nfs4_put_state_owner(struct nfs4_state_owner *);
@@ -252,7 +249,7 @@ extern struct nfs4_state * nfs4_get_open
extern void nfs4_put_open_state(struct nfs4_state *);
extern void nfs4_close_state(struct nfs4_state *, mode_t);
extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
-extern void nfs4_schedule_state_recovery(struct nfs4_client *);
+extern void nfs4_schedule_state_recovery(struct nfs_client *);
extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index ea38d27..fad851b 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -2,6 +2,7 @@
* linux/fs/nfs/nfs4namespace.c
*
* Copyright (C) 2005 Trond Myklebust <Trond.Myklebust at netapp.com>
+ * - Modified by David Howells <dhowells at redhat.com>
*
* NFSv4 namespace
*/
@@ -23,7 +24,7 @@ #define NFSDBG_FACILITY NFSDBG_VFS
/*
* Check if fs_root is valid
*/
-static inline char *nfs4_pathname_string(struct nfs4_pathname *pathname,
+static inline char *nfs4_pathname_string(const struct nfs4_pathname *pathname,
char *buffer, ssize_t buflen)
{
char *end = buffer + buflen;
@@ -34,7 +35,7 @@ static inline char *nfs4_pathname_string
n = pathname->ncomponents;
while (--n >= 0) {
- struct nfs4_string *component = &pathname->components[n];
+ const struct nfs4_string *component = &pathname->components[n];
buflen -= component->len + 1;
if (buflen < 0)
goto Elong;
@@ -47,6 +48,68 @@ Elong:
return ERR_PTR(-ENAMETOOLONG);
}
+/*
+ * Determine the mount path as a string
+ */
+static char *nfs4_path(const struct vfsmount *mnt_parent,
+ const struct dentry *dentry,
+ char *buffer, ssize_t buflen)
+{
+ const char *srvpath;
+
+ srvpath = strchr(mnt_parent->mnt_devname, ':');
+ if (srvpath)
+ srvpath++;
+ else
+ srvpath = mnt_parent->mnt_devname;
+
+ return nfs_path(srvpath, mnt_parent->mnt_root, dentry, buffer, buflen);
+}
+
+/*
+ * Check that fs_locations::fs_root [RFC3530 6.3] is a prefix for what we
+ * believe to be the server path to this dentry
+ */
+static int nfs4_validate_fspath(const struct vfsmount *mnt_parent,
+ const struct dentry *dentry,
+ const struct nfs4_fs_locations *locations,
+ char *page, char *page2)
+{
+ const char *path, *fs_path;
+
+ path = nfs4_path(mnt_parent, dentry, page, PAGE_SIZE);
+ if (IS_ERR(path))
+ return PTR_ERR(path);
+
+ fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE);
+ if (IS_ERR(fs_path))
+ return PTR_ERR(fs_path);
+
+ if (strncmp(path, fs_path, strlen(fs_path)) != 0) {
+ dprintk("%s: path %s does not begin with fsroot %s\n",
+ __FUNCTION__, path, fs_path);
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
+/*
+ * Check if the string represents a "valid" IPv4 address
+ */
+static inline int valid_ipaddr4(const char *buf)
+{
+ int rc, count, in[4];
+
+ rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
+ if (rc != 4)
+ return -EINVAL;
+ for (count = 0; count < 4; count++) {
+ if (in[count] > 255)
+ return -EINVAL;
+ }
+ return 0;
+}
/**
* nfs_follow_referral - set up mountpoint when hitting a referral on moved error
@@ -60,18 +123,17 @@ Elong:
*/
static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
const struct dentry *dentry,
- struct nfs4_fs_locations *locations)
+ const struct nfs4_fs_locations *locations)
{
struct vfsmount *mnt = ERR_PTR(-ENOENT);
struct nfs_clone_mount mountdata = {
.sb = mnt_parent->mnt_sb,
.dentry = dentry,
- .authflavor = NFS_SB(mnt_parent->mnt_sb)->client->cl_auth->au_flavor,
+ .authflavor = NFS_SB(mnt_parent->mnt_sb)->nfs_client->client->cl_auth->au_flavor,
};
- char *page, *page2;
- char *path, *fs_path;
+ char *page = NULL, *page2 = NULL;
char *devname;
- int loc, s;
+ int loc, s, error;
if (locations == NULL || locations->nlocations <= 0)
goto out;
@@ -79,36 +141,30 @@ static struct vfsmount *nfs_follow_refer
dprintk("%s: referral at %s/%s\n", __FUNCTION__,
dentry->d_parent->d_name.name, dentry->d_name.name);
- /* Ensure fs path is a prefix of current dentry path */
page = (char *) __get_free_page(GFP_USER);
- if (page == NULL)
+ if (!page)
goto out;
+
page2 = (char *) __get_free_page(GFP_USER);
- if (page2 == NULL)
+ if (!page2)
goto out;
- path = nfs4_path(dentry, page, PAGE_SIZE);
- if (IS_ERR(path))
- goto out_free;
-
- fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE);
- if (IS_ERR(fs_path))
- goto out_free;
-
- if (strncmp(path, fs_path, strlen(fs_path)) != 0) {
- dprintk("%s: path %s does not begin with fsroot %s\n", __FUNCTION__, path, fs_path);
- goto out_free;
+ /* Ensure fs path is a prefix of current dentry path */
+ error = nfs4_validate_fspath(mnt_parent, dentry, locations, page, page2);
+ if (error < 0) {
+ mnt = ERR_PTR(error);
+ goto out;
}
devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
if (IS_ERR(devname)) {
mnt = (struct vfsmount *)devname;
- goto out_free;
+ goto out;
}
loc = 0;
while (loc < locations->nlocations && IS_ERR(mnt)) {
- struct nfs4_fs_location *location = &locations->locations[loc];
+ const struct nfs4_fs_location *location = &locations->locations[loc];
char *mnt_path;
if (location == NULL || location->nservers <= 0 ||
@@ -140,7 +196,7 @@ static struct vfsmount *nfs_follow_refer
addr.sin_port = htons(NFS_PORT);
mountdata.addr = &addr;
- mnt = vfs_kern_mount(&nfs_referral_nfs4_fs_type, 0, devname, &mountdata);
+ mnt = vfs_kern_mount(&nfs4_referral_fs_type, 0, devname, &mountdata);
if (!IS_ERR(mnt)) {
break;
}
@@ -149,10 +205,9 @@ static struct vfsmount *nfs_follow_refer
loc++;
}
-out_free:
- free_page((unsigned long)page);
- free_page((unsigned long)page2);
out:
+ free_page((unsigned long) page);
+ free_page((unsigned long) page2);
dprintk("%s: done\n", __FUNCTION__);
return mnt;
}
@@ -165,7 +220,7 @@ out:
*/
struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
{
- struct vfsmount *mnt = ERR_PTR(-ENOENT);
+ struct vfsmount *mnt = ERR_PTR(-ENOMEM);
struct dentry *parent;
struct nfs4_fs_locations *fs_locations = NULL;
struct page *page;
@@ -183,11 +238,16 @@ struct vfsmount *nfs_do_refmount(const s
goto out_free;
/* Get locations */
+ mnt = ERR_PTR(-ENOENT);
+
parent = dget_parent(dentry);
- dprintk("%s: getting locations for %s/%s\n", __FUNCTION__, parent->d_name.name, dentry->d_name.name);
+ dprintk("%s: getting locations for %s/%s\n",
+ __FUNCTION__, parent->d_name.name, dentry->d_name.name);
+
err = nfs4_proc_fs_locations(parent->d_inode, dentry, fs_locations, page);
dput(parent);
- if (err != 0 || fs_locations->nlocations <= 0 ||
+ if (err != 0 ||
+ fs_locations->nlocations <= 0 ||
fs_locations->fs_path.ncomponents <= 0)
goto out_free;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1ed6d17..3637b0a 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -64,7 +64,7 @@ static int nfs4_do_fsinfo(struct nfs_ser
static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
-static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp);
+static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
/* Prevent leaks of NFSv4 errors into userland */
int nfs4_map_errors(int err)
@@ -195,7 +195,7 @@ static void nfs4_setup_readdir(u64 cooki
static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
spin_lock(&clp->cl_lock);
if (time_before(clp->cl_last_renewal,timestamp))
clp->cl_last_renewal = timestamp;
@@ -252,7 +252,7 @@ static struct nfs4_opendata *nfs4_openda
atomic_inc(&sp->so_count);
p->o_arg.fh = NFS_FH(dir);
p->o_arg.open_flags = flags,
- p->o_arg.clientid = server->nfs4_state->cl_clientid;
+ p->o_arg.clientid = server->nfs_client->cl_clientid;
p->o_arg.id = sp->so_id;
p->o_arg.name = &dentry->d_name;
p->o_arg.server = server;
@@ -550,7 +550,7 @@ int nfs4_open_delegation_recall(struct d
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
/* Don't recall a delegation if it was lost */
- nfs4_schedule_state_recovery(server->nfs4_state);
+ nfs4_schedule_state_recovery(server->nfs_client);
return err;
}
err = nfs4_handle_exception(server, err, &exception);
@@ -627,7 +627,8 @@ static int _nfs4_proc_open_confirm(struc
* want to ensure that it takes the 'error' code path.
*/
data->rpc_status = -ENOMEM;
- task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
+ task = rpc_run_task(server->nfs_client->client, RPC_TASK_ASYNC,
+ &nfs4_open_confirm_ops, data);
if (IS_ERR(task))
return PTR_ERR(task);
status = nfs4_wait_for_completion_rpc_task(task);
@@ -733,7 +734,8 @@ static int _nfs4_proc_open(struct nfs4_o
* want to ensure that it takes the 'error' code path.
*/
data->rpc_status = -ENOMEM;
- task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
+ task = rpc_run_task(server->nfs_client->client, RPC_TASK_ASYNC,
+ &nfs4_open_ops, data);
if (IS_ERR(task))
return PTR_ERR(task);
status = nfs4_wait_for_completion_rpc_task(task);
@@ -758,7 +760,7 @@ static int _nfs4_proc_open(struct nfs4_o
}
nfs_confirm_seqid(&data->owner->so_seqid, 0);
if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
- return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
+ return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
return 0;
}
@@ -792,11 +794,11 @@ out:
int nfs4_recover_expired_lease(struct nfs_server *server)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
nfs4_schedule_state_recovery(clp);
- return nfs4_wait_clnt_recover(server->client, clp);
+ return nfs4_wait_clnt_recover(server->nfs_client->client, clp);
}
/*
@@ -867,7 +869,7 @@ static int _nfs4_open_delegated(struct i
{
struct nfs_delegation *delegation;
struct nfs_server *server = NFS_SERVER(inode);
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs4_state_owner *sp = NULL;
struct nfs4_state *state = NULL;
@@ -953,7 +955,7 @@ static int _nfs4_do_open(struct inode *d
struct nfs4_state_owner *sp;
struct nfs4_state *state = NULL;
struct nfs_server *server = NFS_SERVER(dir);
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
struct nfs4_opendata *opendata;
int status;
@@ -1073,7 +1075,7 @@ static int _nfs4_do_setattr(struct inode
} else
memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
if (status == 0 && state != NULL)
renew_lease(server, timestamp);
return status;
@@ -1133,7 +1135,7 @@ static void nfs4_close_done(struct rpc_t
break;
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
- nfs4_schedule_state_recovery(server->nfs4_state);
+ nfs4_schedule_state_recovery(server->nfs_client);
break;
default:
if (nfs4_async_handle_error(task, server) == -EAGAIN) {
@@ -1224,7 +1226,8 @@ int nfs4_do_close(struct inode *inode, s
calldata->res.fattr = &calldata->fattr;
calldata->res.server = server;
- status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
+ status = nfs4_call_async(server->nfs_client->client, &nfs4_close_ops,
+ calldata);
if (status == 0)
goto out;
@@ -1268,7 +1271,7 @@ nfs4_atomic_open(struct inode *dir, stru
BUG_ON(nd->intent.open.flags & O_CREAT);
}
- cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
+ cred = rpcauth_lookupcred(NFS_SCLIENT(dir)->client->cl_auth, 0);
if (IS_ERR(cred))
return (struct dentry *)cred;
state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
@@ -1291,7 +1294,7 @@ nfs4_open_revalidate(struct inode *dir,
struct rpc_cred *cred;
struct nfs4_state *state;
- cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
+ cred = rpcauth_lookupcred(NFS_SCLIENT(dir)->client->cl_auth, 0);
if (IS_ERR(cred))
return PTR_ERR(cred);
state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
@@ -1334,7 +1337,7 @@ static int _nfs4_server_capabilities(str
};
int status;
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
if (status == 0) {
memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
@@ -1377,7 +1380,7 @@ static int _nfs4_lookup_root(struct nfs_
.rpc_resp = &res,
};
nfs_fattr_init(info->fattr);
- return rpc_call_sync(server->client, &msg, 0);
+ return rpc_call_sync(server->nfs_client->client, &msg, 0);
}
static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
@@ -1393,70 +1396,19 @@ static int nfs4_lookup_root(struct nfs_s
return err;
}
+/*
+ * get the file handle for the "/" directory on the server
+ */
static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
- struct nfs_fsinfo *info)
+ struct nfs_fsinfo *info)
{
- struct nfs_fattr * fattr = info->fattr;
- unsigned char * p;
- struct qstr q;
- struct nfs4_lookup_arg args = {
- .dir_fh = fhandle,
- .name = &q,
- .bitmask = nfs4_fattr_bitmap,
- };
- struct nfs4_lookup_res res = {
- .server = server,
- .fattr = fattr,
- .fh = fhandle,
- };
- struct rpc_message msg = {
- .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
- .rpc_argp = &args,
- .rpc_resp = &res,
- };
int status;
- /*
- * Now we do a separate LOOKUP for each component of the mount path.
- * The LOOKUPs are done separately so that we can conveniently
- * catch an ERR_WRONGSEC if it occurs along the way...
- */
status = nfs4_lookup_root(server, fhandle, info);
- if (status)
- goto out;
-
- p = server->mnt_path;
- for (;;) {
- struct nfs4_exception exception = { };
-
- while (*p == '/')
- p++;
- if (!*p)
- break;
- q.name = p;
- while (*p && (*p != '/'))
- p++;
- q.len = p - q.name;
-
- do {
- nfs_fattr_init(fattr);
- status = nfs4_handle_exception(server,
- rpc_call_sync(server->client, &msg, 0),
- &exception);
- } while (exception.retry);
- if (status == 0)
- continue;
- if (status == -ENOENT) {
- printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
- printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
- }
- break;
- }
if (status == 0)
status = nfs4_server_capabilities(server, fhandle);
if (status == 0)
status = nfs4_do_fsinfo(server, fhandle, info);
-out:
return nfs4_map_errors(status);
}
@@ -1521,7 +1473,7 @@ static int _nfs4_proc_getattr(struct nfs
};
nfs_fattr_init(fattr);
- return rpc_call_sync(server->client, &msg, 0);
+ return rpc_call_sync(server->nfs_client->client, &msg, 0);
}
static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
@@ -1565,7 +1517,7 @@ nfs4_proc_setattr(struct dentry *dentry,
nfs_fattr_init(fattr);
- cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
+ cred = rpcauth_lookupcred(NFS_SCLIENT(inode)->client->cl_auth, 0);
if (IS_ERR(cred))
return PTR_ERR(cred);
@@ -1583,6 +1535,52 @@ nfs4_proc_setattr(struct dentry *dentry,
return status;
}
+static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
+ struct qstr *name, struct nfs_fh *fhandle,
+ struct nfs_fattr *fattr)
+{
+ int status;
+ struct nfs4_lookup_arg args = {
+ .bitmask = server->attr_bitmask,
+ .dir_fh = dirfh,
+ .name = name,
+ };
+ struct nfs4_lookup_res res = {
+ .server = server,
+ .fattr = fattr,
+ .fh = fhandle,
+ };
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
+ .rpc_argp = &args,
+ .rpc_resp = &res,
+ };
+
+ nfs_fattr_init(fattr);
+
+ dprintk("NFS call lookupfh %s\n", name->name);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
+ dprintk("NFS reply lookupfh: %d\n", status);
+ if (status == -NFS4ERR_MOVED)
+ status = -EREMOTE;
+ return status;
+}
+
+static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
+ struct qstr *name, struct nfs_fh *fhandle,
+ struct nfs_fattr *fattr)
+{
+ struct nfs4_exception exception = { };
+ int err;
+ do {
+ err = nfs4_handle_exception(server,
+ _nfs4_proc_lookupfh(server, dirfh, name,
+ fhandle, fattr),
+ &exception);
+ } while (exception.retry);
+ return err;
+}
+
static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
{
@@ -1756,7 +1754,7 @@ static int _nfs4_proc_read(struct nfs_re
(long long) rdata->args.offset);
nfs_fattr_init(fattr);
- status = rpc_call_sync(server->client, &msg, flags);
+ status = rpc_call_sync(server->nfs_client->client, &msg, flags);
if (!status)
renew_lease(server, timestamp);
dprintk("NFS reply read: %d\n", status);
@@ -1796,7 +1794,7 @@ static int _nfs4_proc_write(struct nfs_w
wdata->res.server = server;
wdata->timestamp = jiffies;
nfs_fattr_init(fattr);
- status = rpc_call_sync(server->client, &msg, rpcflags);
+ status = rpc_call_sync(server->nfs_client->client, &msg, rpcflags);
dprintk("NFS reply write: %d\n", status);
if (status < 0)
return status;
@@ -1837,7 +1835,7 @@ static int _nfs4_proc_commit(struct nfs_
cdata->res.server = server;
cdata->timestamp = jiffies;
nfs_fattr_init(fattr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
if (status >= 0)
renew_lease(server, cdata->timestamp);
dprintk("NFS reply commit: %d\n", status);
@@ -1881,7 +1879,7 @@ nfs4_proc_create(struct inode *dir, stru
struct rpc_cred *cred;
int status = 0;
- cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
+ cred = rpcauth_lookupcred(NFS_SCLIENT(dir)->client->cl_auth, 0);
if (IS_ERR(cred)) {
status = PTR_ERR(cred);
goto out;
@@ -1928,7 +1926,7 @@ static int _nfs4_proc_remove(struct inod
int status;
nfs_fattr_init(res.dir_attr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
if (status == 0) {
update_changeattr(dir, &res.cinfo);
nfs_post_op_update_inode(dir, res.dir_attr);
@@ -2018,7 +2016,7 @@ static int _nfs4_proc_rename(struct inod
nfs_fattr_init(res.old_fattr);
nfs_fattr_init(res.new_fattr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
if (!status) {
update_changeattr(old_dir, &res.old_cinfo);
@@ -2067,7 +2065,7 @@ static int _nfs4_proc_link(struct inode
nfs_fattr_init(res.fattr);
nfs_fattr_init(res.dir_attr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
if (!status) {
update_changeattr(dir, &res.cinfo);
nfs_post_op_update_inode(dir, res.dir_attr);
@@ -2328,7 +2326,7 @@ static int _nfs4_proc_statfs(struct nfs_
};
nfs_fattr_init(fsstat->fattr);
- return rpc_call_sync(server->client, &msg, 0);
+ return rpc_call_sync(server->nfs_client->client, &msg, 0);
}
static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
@@ -2356,7 +2354,7 @@ static int _nfs4_do_fsinfo(struct nfs_se
.rpc_resp = fsinfo,
};
- return rpc_call_sync(server->client, &msg, 0);
+ return rpc_call_sync(server->nfs_client->client, &msg, 0);
}
static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
@@ -2398,7 +2396,7 @@ static int _nfs4_proc_pathconf(struct nf
}
nfs_fattr_init(pathconf->fattr);
- return rpc_call_sync(server->client, &msg, 0);
+ return rpc_call_sync(server->nfs_client->client, &msg, 0);
}
static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
@@ -2521,7 +2519,7 @@ static void nfs4_proc_commit_setup(struc
*/
static void nfs4_renew_done(struct rpc_task *task, void *data)
{
- struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
+ struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
unsigned long timestamp = (unsigned long)data;
if (task->tk_status < 0) {
@@ -2543,7 +2541,7 @@ static const struct rpc_call_ops nfs4_re
.rpc_call_done = nfs4_renew_done,
};
-int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred)
+int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
@@ -2555,7 +2553,7 @@ int nfs4_proc_async_renew(struct nfs4_cl
&nfs4_renew_ops, (void *)jiffies);
}
-int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred)
+int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
@@ -2757,7 +2755,7 @@ static int nfs4_proc_set_acl(struct inod
return -EOPNOTSUPP;
nfs_inode_return_delegation(inode);
buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
- ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
+ ret = rpc_call_sync(NFS_SCLIENT(inode)->client, &msg, 0);
if (ret == 0)
nfs4_write_cached_acl(inode, buf, buflen);
return ret;
@@ -2766,7 +2764,7 @@ static int nfs4_proc_set_acl(struct inod
static int
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
if (!clp || task->tk_status >= 0)
return 0;
@@ -2803,7 +2801,7 @@ static int nfs4_wait_bit_interruptible(v
return 0;
}
-static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
+static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
{
sigset_t oldset;
int res;
@@ -2846,7 +2844,7 @@ static int nfs4_delay(struct rpc_clnt *c
*/
int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
int ret = errorcode;
exception->retry = 0;
@@ -2857,13 +2855,14 @@ int nfs4_handle_exception(const struct n
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
nfs4_schedule_state_recovery(clp);
- ret = nfs4_wait_clnt_recover(server->client, clp);
+ ret = nfs4_wait_clnt_recover(server->nfs_client->client, clp);
if (ret == 0)
exception->retry = 1;
break;
case -NFS4ERR_GRACE:
case -NFS4ERR_DELAY:
- ret = nfs4_delay(server->client, &exception->timeout);
+ ret = nfs4_delay(server->nfs_client->client,
+ &exception->timeout);
if (ret != 0)
break;
case -NFS4ERR_OLD_STATEID:
@@ -2873,7 +2872,7 @@ int nfs4_handle_exception(const struct n
return nfs4_map_errors(ret);
}
-int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
+int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
{
nfs4_verifier sc_verifier;
struct nfs4_setclientid setclientid = {
@@ -2897,14 +2896,14 @@ int nfs4_proc_setclientid(struct nfs4_cl
for(;;) {
setclientid.sc_name_len = scnprintf(setclientid.sc_name,
sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
- clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
+ clp->ip_addr, NIPQUAD(clp->addr.sin_addr),
cred->cr_ops->cr_name,
clp->cl_id_uniquifier);
setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
sizeof(setclientid.sc_netid), "tcp");
setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
sizeof(setclientid.sc_uaddr), "%s.%d.%d",
- clp->cl_ipaddr, port >> 8, port & 255);
+ clp->ip_addr, port >> 8, port & 255);
status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
if (status != -NFS4ERR_CLID_INUSE)
@@ -2920,7 +2919,7 @@ int nfs4_proc_setclientid(struct nfs4_cl
return status;
}
-static int _nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
+static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
{
struct nfs_fsinfo fsinfo;
struct rpc_message msg = {
@@ -2944,7 +2943,7 @@ static int _nfs4_proc_setclientid_confir
return status;
}
-int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
+int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
{
long timeout;
int err;
@@ -3052,7 +3051,7 @@ int nfs4_proc_delegreturn(struct inode *
switch (err) {
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
- nfs4_schedule_state_recovery(server->nfs4_state);
+ nfs4_schedule_state_recovery(server->nfs_client);
case 0:
return 0;
}
@@ -3081,7 +3080,7 @@ static int _nfs4_proc_getlk(struct nfs4_
{
struct inode *inode = state->inode;
struct nfs_server *server = NFS_SERVER(inode);
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
struct nfs_lockt_args arg = {
.fh = NFS_FH(inode),
.fl = request,
@@ -3105,7 +3104,7 @@ static int _nfs4_proc_getlk(struct nfs4_
goto out;
lsp = request->fl_u.nfs4_fl.owner;
arg.lock_owner.id = lsp->ls_id;
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
switch (status) {
case 0:
request->fl_type = F_UNLCK;
@@ -3209,7 +3208,7 @@ static void nfs4_locku_done(struct rpc_t
break;
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_EXPIRED:
- nfs4_schedule_state_recovery(calldata->server->nfs4_state);
+ nfs4_schedule_state_recovery(calldata->server->nfs_client);
break;
default:
if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
@@ -3325,7 +3324,7 @@ static struct nfs4_lockdata *nfs4_alloc_
if (p->arg.lock_seqid == NULL)
goto out_free;
p->arg.lock_stateid = &lsp->ls_stateid;
- p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
+ p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
p->arg.lock_owner.id = lsp->ls_id;
p->lsp = lsp;
atomic_inc(&lsp->ls_count);
@@ -3493,7 +3492,7 @@ static int nfs4_lock_expired(struct nfs4
static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
- struct nfs4_client *clp = state->owner->so_client;
+ struct nfs_client *clp = state->owner->so_client;
int status;
/* Is this a delegated open? */
@@ -3658,7 +3657,7 @@ int nfs4_proc_fs_locations(struct inode
fs_locations->fattr.valid = 0;
fs_locations->server = server;
fs_locations->nlocations = 0;
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
dprintk("%s: returned status = %d\n", __FUNCTION__, status);
return status;
}
@@ -3690,6 +3689,7 @@ struct nfs_rpc_ops nfs_v4_clientops = {
.getroot = nfs4_proc_get_root,
.getattr = nfs4_proc_getattr,
.setattr = nfs4_proc_setattr,
+ .lookupfh = nfs4_proc_lookupfh,
.lookup = nfs4_proc_lookup,
.access = nfs4_proc_access,
.readlink = nfs4_proc_readlink,
diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c
index 5d764d8..c047abc 100644
--- a/fs/nfs/nfs4renewd.c
+++ b/fs/nfs/nfs4renewd.c
@@ -61,7 +61,7 @@ #define NFSDBG_FACILITY NFSDBG_PROC
void
nfs4_renew_state(void *data)
{
- struct nfs4_client *clp = (struct nfs4_client *)data;
+ struct nfs_client *clp = (struct nfs_client *)data;
struct rpc_cred *cred;
long lease, timeout;
unsigned long last, now;
@@ -69,7 +69,7 @@ nfs4_renew_state(void *data)
down_read(&clp->cl_sem);
dprintk("%s: start\n", __FUNCTION__);
/* Are there any active superblocks? */
- if (list_empty(&clp->cl_superblocks))
+ if (list_empty(&clp->superblocks))
goto out;
spin_lock(&clp->cl_lock);
lease = clp->cl_lease_time;
@@ -108,7 +108,7 @@ out:
/* Must be called with clp->cl_sem locked for writes */
void
-nfs4_schedule_state_renewal(struct nfs4_client *clp)
+nfs4_schedule_state_renewal(struct nfs_client *clp)
{
long timeout;
@@ -127,26 +127,13 @@ nfs4_schedule_state_renewal(struct nfs4_
void
nfs4_renewd_prepare_shutdown(struct nfs_server *server)
{
- struct nfs4_client *clp = server->nfs4_state;
-
- if (!clp)
- return;
flush_scheduled_work();
- down_write(&clp->cl_sem);
- if (!list_empty(&server->nfs4_siblings))
- list_del_init(&server->nfs4_siblings);
- up_write(&clp->cl_sem);
}
-/* Must be called with clp->cl_sem locked for writes */
void
-nfs4_kill_renewd(struct nfs4_client *clp)
+nfs4_kill_renewd(struct nfs_client *clp)
{
down_read(&clp->cl_sem);
- if (!list_empty(&clp->cl_superblocks)) {
- up_read(&clp->cl_sem);
- return;
- }
cancel_delayed_work(&clp->cl_renewd);
up_read(&clp->cl_sem);
flush_scheduled_work();
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 96e5b82..aedc948 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -51,149 +51,15 @@ #include <linux/bitops.h>
#include "nfs4_fs.h"
#include "callback.h"
#include "delegation.h"
+#include "internal.h"
#define OPENOWNER_POOL_SIZE 8
const nfs4_stateid zero_stateid;
-static DEFINE_SPINLOCK(state_spinlock);
static LIST_HEAD(nfs4_clientid_list);
-void
-init_nfsv4_state(struct nfs_server *server)
-{
- server->nfs4_state = NULL;
- INIT_LIST_HEAD(&server->nfs4_siblings);
-}
-
-void
-destroy_nfsv4_state(struct nfs_server *server)
-{
- kfree(server->mnt_path);
- server->mnt_path = NULL;
- if (server->nfs4_state) {
- nfs4_put_client(server->nfs4_state);
- server->nfs4_state = NULL;
- }
-}
-
-/*
- * nfs4_get_client(): returns an empty client structure
- * nfs4_put_client(): drops reference to client structure
- *
- * Since these are allocated/deallocated very rarely, we don't
- * bother putting them in a slab cache...
- */
-static struct nfs4_client *
-nfs4_alloc_client(struct in_addr *addr)
-{
- struct nfs4_client *clp;
-
- if (nfs_callback_up() < 0)
- return NULL;
- if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL) {
- nfs_callback_down();
- return NULL;
- }
- memcpy(&clp->cl_addr, addr, sizeof(clp->cl_addr));
- init_rwsem(&clp->cl_sem);
- INIT_LIST_HEAD(&clp->cl_delegations);
- INIT_LIST_HEAD(&clp->cl_state_owners);
- INIT_LIST_HEAD(&clp->cl_unused);
- spin_lock_init(&clp->cl_lock);
- atomic_set(&clp->cl_count, 1);
- INIT_WORK(&clp->cl_renewd, nfs4_renew_state, clp);
- INIT_LIST_HEAD(&clp->cl_superblocks);
- rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS4 client");
- clp->cl_rpcclient = ERR_PTR(-EINVAL);
- clp->cl_boot_time = CURRENT_TIME;
- clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
- return clp;
-}
-
-static void
-nfs4_free_client(struct nfs4_client *clp)
-{
- struct nfs4_state_owner *sp;
-
- while (!list_empty(&clp->cl_unused)) {
- sp = list_entry(clp->cl_unused.next,
- struct nfs4_state_owner,
- so_list);
- list_del(&sp->so_list);
- kfree(sp);
- }
- BUG_ON(!list_empty(&clp->cl_state_owners));
- nfs_idmap_delete(clp);
- if (!IS_ERR(clp->cl_rpcclient))
- rpc_shutdown_client(clp->cl_rpcclient);
- kfree(clp);
- nfs_callback_down();
-}
-
-static struct nfs4_client *__nfs4_find_client(struct in_addr *addr)
-{
- struct nfs4_client *clp;
- list_for_each_entry(clp, &nfs4_clientid_list, cl_servers) {
- if (memcmp(&clp->cl_addr, addr, sizeof(clp->cl_addr)) == 0) {
- atomic_inc(&clp->cl_count);
- return clp;
- }
- }
- return NULL;
-}
-
-struct nfs4_client *nfs4_find_client(struct in_addr *addr)
-{
- struct nfs4_client *clp;
- spin_lock(&state_spinlock);
- clp = __nfs4_find_client(addr);
- spin_unlock(&state_spinlock);
- return clp;
-}
-
-struct nfs4_client *
-nfs4_get_client(struct in_addr *addr)
-{
- struct nfs4_client *clp, *new = NULL;
-
- spin_lock(&state_spinlock);
- for (;;) {
- clp = __nfs4_find_client(addr);
- if (clp != NULL)
- break;
- clp = new;
- if (clp != NULL) {
- list_add(&clp->cl_servers, &nfs4_clientid_list);
- new = NULL;
- break;
- }
- spin_unlock(&state_spinlock);
- new = nfs4_alloc_client(addr);
- spin_lock(&state_spinlock);
- if (new == NULL)
- break;
- }
- spin_unlock(&state_spinlock);
- if (new)
- nfs4_free_client(new);
- return clp;
-}
-
-void
-nfs4_put_client(struct nfs4_client *clp)
-{
- if (!atomic_dec_and_lock(&clp->cl_count, &state_spinlock))
- return;
- list_del(&clp->cl_servers);
- spin_unlock(&state_spinlock);
- BUG_ON(!list_empty(&clp->cl_superblocks));
- rpc_wake_up(&clp->cl_rpcwaitq);
- nfs4_kill_renewd(clp);
- nfs4_free_client(clp);
-}
-
-static int nfs4_init_client(struct nfs4_client *clp, struct rpc_cred *cred)
+static int nfs4_init_client(struct nfs_client *clp, struct rpc_cred *cred)
{
int status = nfs4_proc_setclientid(clp, NFS4_CALLBACK,
nfs_callback_tcpport, cred);
@@ -205,13 +71,13 @@ static int nfs4_init_client(struct nfs4_
}
u32
-nfs4_alloc_lockowner_id(struct nfs4_client *clp)
+nfs4_alloc_lockowner_id(struct nfs_client *clp)
{
return clp->cl_lockowner_id ++;
}
static struct nfs4_state_owner *
-nfs4_client_grab_unused(struct nfs4_client *clp, struct rpc_cred *cred)
+nfs4_client_grab_unused(struct nfs_client *clp, struct rpc_cred *cred)
{
struct nfs4_state_owner *sp = NULL;
@@ -225,7 +91,7 @@ nfs4_client_grab_unused(struct nfs4_clie
return sp;
}
-struct rpc_cred *nfs4_get_renew_cred(struct nfs4_client *clp)
+struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
struct rpc_cred *cred = NULL;
@@ -239,7 +105,7 @@ struct rpc_cred *nfs4_get_renew_cred(str
return cred;
}
-struct rpc_cred *nfs4_get_setclientid_cred(struct nfs4_client *clp)
+struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
@@ -252,7 +118,7 @@ struct rpc_cred *nfs4_get_setclientid_cr
}
static struct nfs4_state_owner *
-nfs4_find_state_owner(struct nfs4_client *clp, struct rpc_cred *cred)
+nfs4_find_state_owner(struct nfs_client *clp, struct rpc_cred *cred)
{
struct nfs4_state_owner *sp, *res = NULL;
@@ -295,7 +161,7 @@ nfs4_alloc_state_owner(void)
void
nfs4_drop_state_owner(struct nfs4_state_owner *sp)
{
- struct nfs4_client *clp = sp->so_client;
+ struct nfs_client *clp = sp->so_client;
spin_lock(&clp->cl_lock);
list_del_init(&sp->so_list);
spin_unlock(&clp->cl_lock);
@@ -307,7 +173,7 @@ nfs4_drop_state_owner(struct nfs4_state_
*/
struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred)
{
- struct nfs4_client *clp = server->nfs4_state;
+ struct nfs_client *clp = server->nfs_client;
struct nfs4_state_owner *sp, *new;
get_rpccred(cred);
@@ -338,7 +204,7 @@ struct nfs4_state_owner *nfs4_get_state_
*/
void nfs4_put_state_owner(struct nfs4_state_owner *sp)
{
- struct nfs4_client *clp = sp->so_client;
+ struct nfs_client *clp = sp->so_client;
struct rpc_cred *cred = sp->so_cred;
if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock))
@@ -541,7 +407,7 @@ __nfs4_find_lock_state(struct nfs4_state
static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner)
{
struct nfs4_lock_state *lsp;
- struct nfs4_client *clp = state->owner->so_client;
+ struct nfs_client *clp = state->owner->so_client;
lsp = kzalloc(sizeof(*lsp), GFP_KERNEL);
if (lsp == NULL)
@@ -753,7 +619,7 @@ out:
static int reclaimer(void *);
-static inline void nfs4_clear_recover_bit(struct nfs4_client *clp)
+static inline void nfs4_clear_recover_bit(struct nfs_client *clp)
{
smp_mb__before_clear_bit();
clear_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state);
@@ -765,25 +631,25 @@ static inline void nfs4_clear_recover_bi
/*
* State recovery routine
*/
-static void nfs4_recover_state(struct nfs4_client *clp)
+static void nfs4_recover_state(struct nfs_client *clp)
{
struct task_struct *task;
__module_get(THIS_MODULE);
atomic_inc(&clp->cl_count);
task = kthread_run(reclaimer, clp, "%u.%u.%u.%u-reclaim",
- NIPQUAD(clp->cl_addr));
+ NIPQUAD(clp->addr.sin_addr));
if (!IS_ERR(task))
return;
nfs4_clear_recover_bit(clp);
- nfs4_put_client(clp);
+ nfs_put_client(clp);
module_put(THIS_MODULE);
}
/*
* Schedule a state recovery attempt
*/
-void nfs4_schedule_state_recovery(struct nfs4_client *clp)
+void nfs4_schedule_state_recovery(struct nfs_client *clp)
{
if (!clp)
return;
@@ -880,7 +746,7 @@ out_err:
return status;
}
-static void nfs4_state_mark_reclaim(struct nfs4_client *clp)
+static void nfs4_state_mark_reclaim(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
struct nfs4_state *state;
@@ -904,7 +770,7 @@ static void nfs4_state_mark_reclaim(stru
static int reclaimer(void *ptr)
{
- struct nfs4_client *clp = ptr;
+ struct nfs_client *clp = ptr;
struct nfs4_state_owner *sp;
struct nfs4_state_recovery_ops *ops;
struct rpc_cred *cred;
@@ -916,7 +782,7 @@ static int reclaimer(void *ptr)
lock_kernel();
down_write(&clp->cl_sem);
/* Are there any NFS mounts out there? */
- if (list_empty(&clp->cl_superblocks))
+ if (list_empty(&clp->superblocks))
goto out;
restart_loop:
ops = &nfs4_network_partition_recovery_ops;
@@ -971,12 +837,12 @@ out:
if (status == -NFS4ERR_CB_PATH_DOWN)
nfs_handle_cb_pathdown(clp);
nfs4_clear_recover_bit(clp);
- nfs4_put_client(clp);
+ nfs_put_client(clp);
module_put_and_exit(0);
return 0;
out_error:
printk(KERN_WARNING "Error: state recovery failed on NFSv4 server %u.%u.%u.%u with error %d\n",
- NIPQUAD(clp->cl_addr.s_addr), -status);
+ NIPQUAD(clp->addr.sin_addr), -status);
set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
goto out;
}
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index dd837bc..217647b 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -58,7 +58,7 @@ #define NFSDBG_FACILITY NFSDBG_XDR
/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO EIO
-static int nfs_stat_to_errno(int);
+static int nfs4_stat_to_errno(int);
/* NFSv4 COMPOUND tags are only wanted for debugging purposes */
#ifdef DEBUG
@@ -529,7 +529,7 @@ static int encode_attrs(struct xdr_strea
if (iap->ia_valid & ATTR_MODE)
len += 4;
if (iap->ia_valid & ATTR_UID) {
- owner_namelen = nfs_map_uid_to_name(server->nfs4_state, iap->ia_uid, owner_name);
+ owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
if (owner_namelen < 0) {
printk(KERN_WARNING "nfs: couldn't resolve uid %d to string\n",
iap->ia_uid);
@@ -541,7 +541,7 @@ static int encode_attrs(struct xdr_strea
len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
}
if (iap->ia_valid & ATTR_GID) {
- owner_grouplen = nfs_map_gid_to_group(server->nfs4_state, iap->ia_gid, owner_group);
+ owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
if (owner_grouplen < 0) {
printk(KERN_WARNING "nfs4: couldn't resolve gid %d to string\n",
iap->ia_gid);
@@ -1160,7 +1160,7 @@ static int encode_rename(struct xdr_stre
return 0;
}
-static int encode_renew(struct xdr_stream *xdr, const struct nfs4_client *client_stateid)
+static int encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid)
{
uint32_t *p;
@@ -1246,7 +1246,7 @@ static int encode_setclientid(struct xdr
return 0;
}
-static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs4_client *client_state)
+static int encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state)
{
uint32_t *p;
@@ -1945,7 +1945,7 @@ static int nfs4_xdr_enc_server_caps(stru
/*
* a RENEW request
*/
-static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
+static int nfs4_xdr_enc_renew(struct rpc_rqst *req, uint32_t *p, struct nfs_client *clp)
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
@@ -1975,7 +1975,7 @@ static int nfs4_xdr_enc_setclientid(stru
/*
* a SETCLIENTID_CONFIRM request
*/
-static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs4_client *clp)
+static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, struct nfs_client *clp)
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
@@ -2127,12 +2127,12 @@ static int decode_op_hdr(struct xdr_stre
}
READ32(nfserr);
if (nfserr != NFS_OK)
- return -nfs_stat_to_errno(nfserr);
+ return -nfs4_stat_to_errno(nfserr);
return 0;
}
/* Dummy routine */
-static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs4_client *clp)
+static int decode_ace(struct xdr_stream *xdr, void *ace, struct nfs_client *clp)
{
uint32_t *p;
unsigned int strlen;
@@ -2636,7 +2636,7 @@ static int decode_attr_nlink(struct xdr_
return 0;
}
-static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *uid)
+static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *uid)
{
uint32_t len, *p;
@@ -2660,7 +2660,7 @@ static int decode_attr_owner(struct xdr_
return 0;
}
-static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_client *clp, int32_t *gid)
+static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_client *clp, int32_t *gid)
{
uint32_t len, *p;
@@ -3051,9 +3051,9 @@ static int decode_getfattr(struct xdr_st
fattr->mode |= fmode;
if ((status = decode_attr_nlink(xdr, bitmap, &fattr->nlink)) != 0)
goto xdr_error;
- if ((status = decode_attr_owner(xdr, bitmap, server->nfs4_state, &fattr->uid)) != 0)
+ if ((status = decode_attr_owner(xdr, bitmap, server->nfs_client, &fattr->uid)) != 0)
goto xdr_error;
- if ((status = decode_attr_group(xdr, bitmap, server->nfs4_state, &fattr->gid)) != 0)
+ if ((status = decode_attr_group(xdr, bitmap, server->nfs_client, &fattr->gid)) != 0)
goto xdr_error;
if ((status = decode_attr_rdev(xdr, bitmap, &fattr->rdev)) != 0)
goto xdr_error;
@@ -3254,7 +3254,7 @@ static int decode_delegation(struct xdr_
if (decode_space_limit(xdr, &res->maxsize) < 0)
return -EIO;
}
- return decode_ace(xdr, NULL, res->server->nfs4_state);
+ return decode_ace(xdr, NULL, res->server->nfs_client);
}
static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
@@ -3565,7 +3565,7 @@ static int decode_setattr(struct xdr_str
return 0;
}
-static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_client *clp)
+static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
{
uint32_t *p;
uint32_t opnum;
@@ -3598,7 +3598,7 @@ static int decode_setclientid(struct xdr
READ_BUF(len);
return -NFSERR_CLID_INUSE;
} else
- return -nfs_stat_to_errno(nfserr);
+ return -nfs4_stat_to_errno(nfserr);
return 0;
}
@@ -4256,7 +4256,7 @@ static int nfs4_xdr_dec_fsinfo(struct rp
if (!status)
status = decode_fsinfo(&xdr, fsinfo);
if (!status)
- status = -nfs_stat_to_errno(hdr.status);
+ status = -nfs4_stat_to_errno(hdr.status);
return status;
}
@@ -4335,7 +4335,7 @@ static int nfs4_xdr_dec_renew(struct rpc
* a SETCLIENTID request
*/
static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, uint32_t *p,
- struct nfs4_client *clp)
+ struct nfs_client *clp)
{
struct xdr_stream xdr;
struct compound_hdr hdr;
@@ -4346,7 +4346,7 @@ static int nfs4_xdr_dec_setclientid(stru
if (!status)
status = decode_setclientid(&xdr, clp);
if (!status)
- status = -nfs_stat_to_errno(hdr.status);
+ status = -nfs4_stat_to_errno(hdr.status);
return status;
}
@@ -4368,7 +4368,7 @@ static int nfs4_xdr_dec_setclientid_conf
if (!status)
status = decode_fsinfo(&xdr, fsinfo);
if (!status)
- status = -nfs_stat_to_errno(hdr.status);
+ status = -nfs4_stat_to_errno(hdr.status);
return status;
}
@@ -4521,7 +4521,7 @@ static struct {
* This one is used jointly by NFSv2 and NFSv3.
*/
static int
-nfs_stat_to_errno(int stat)
+nfs4_stat_to_errno(int stat)
{
int i;
for (i = 0; nfs_errtbl[i].stat != -1; i++) {
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index f08886c..4077e42 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -73,7 +73,7 @@ nfs_create_request(struct nfs_open_conte
/* Try to free up at least one request in order to stay
* below the hard limit
*/
- if (signalled() && (server->flags & NFS_MOUNT_INTR))
+ if (signalled() && (server->nfs_client->flags & NFS_MOUNT_INTR))
return ERR_PTR(-ERESTARTSYS);
yield();
}
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index b3899ea..e564e45 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -66,14 +66,14 @@ nfs_proc_get_root(struct nfs_server *ser
dprintk("%s: call getattr\n", __FUNCTION__);
nfs_fattr_init(fattr);
- status = rpc_call_sync(server->client_sys, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client_sys, &msg, 0);
dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
if (status)
return status;
dprintk("%s: call statfs\n", __FUNCTION__);
msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
msg.rpc_resp = &fsinfo;
- status = rpc_call_sync(server->client_sys, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client_sys, &msg, 0);
dprintk("%s: reply statfs: %d\n", __FUNCTION__, status);
if (status)
return status;
@@ -105,7 +105,7 @@ nfs_proc_getattr(struct nfs_server *serv
dprintk("NFS call getattr\n");
nfs_fattr_init(fattr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
dprintk("NFS reply getattr: %d\n", status);
return status;
}
@@ -556,7 +556,7 @@ nfs_proc_statfs(struct nfs_server *serve
dprintk("NFS call statfs\n");
nfs_fattr_init(stat->fattr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
dprintk("NFS reply statfs: %d\n", status);
if (status)
goto out;
@@ -584,7 +584,7 @@ nfs_proc_fsinfo(struct nfs_server *serve
dprintk("NFS call fsinfo\n");
nfs_fattr_init(info->fattr);
- status = rpc_call_sync(server->client, &msg, 0);
+ status = rpc_call_sync(server->nfs_client->client, &msg, 0);
dprintk("NFS reply fsinfo: %d\n", status);
if (status)
goto out;
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 5458ffb..58f3444 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -107,7 +107,7 @@ int nfs_return_empty_page(struct page *p
static int nfs_readpage_sync(struct nfs_open_context *ctx, struct inode *inode,
struct page *page)
{
- unsigned int rsize = NFS_SERVER(inode)->rsize;
+ unsigned int rsize = NFS_SCLIENT(inode)->rsize;
unsigned int count = PAGE_CACHE_SIZE;
int result;
struct nfs_read_data *rdata;
@@ -141,7 +141,7 @@ static int nfs_readpage_sync(struct nfs_
rdata->args.offset = page_offset(page) + rdata->args.pgbase;
dprintk("NFS: nfs_proc_read(%s, (%s/%Ld), %Lu, %u)\n",
- NFS_SERVER(inode)->hostname,
+ NFS_SCLIENT(inode)->hostname,
inode->i_sb->s_id,
(long long)NFS_FILEID(inode),
(unsigned long long)rdata->args.pgbase,
@@ -310,7 +310,7 @@ static int nfs_pagein_multi(struct list_
struct nfs_page *req = nfs_list_entry(head->next);
struct page *page = req->wb_page;
struct nfs_read_data *data;
- unsigned int rsize = NFS_SERVER(inode)->rsize;
+ unsigned int rsize = NFS_SCLIENT(inode)->rsize;
unsigned int nbytes, offset;
int requests = 0;
LIST_HEAD(list);
@@ -373,10 +373,10 @@ static int nfs_pagein_one(struct list_he
struct nfs_read_data *data;
unsigned int count;
- if (NFS_SERVER(inode)->rsize < PAGE_CACHE_SIZE)
+ if (NFS_SCLIENT(inode)->rsize < PAGE_CACHE_SIZE)
return nfs_pagein_multi(head, inode);
- data = nfs_readdata_alloc(NFS_SERVER(inode)->rpages);
+ data = nfs_readdata_alloc(NFS_SCLIENT(inode)->rpages);
if (!data)
goto out_bad;
@@ -642,7 +642,7 @@ int nfs_readpages(struct file *filp, str
filp->private_data);
ret = read_cache_pages(mapping, pages, readpage_async_filler, &desc);
if (!list_empty(&head)) {
- int err = nfs_pagein_list(&head, server->rpages);
+ int err = nfs_pagein_list(&head, server->nfs_client->rpages);
if (!ret)
nfs_add_stats(inode, NFSIOS_READPAGES, err);
ret = err;
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 5eacb7d..06b5a2a 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -13,6 +13,11 @@
*
* Split from inode.c by David Howells <dhowells at redhat.com>
*
+ * - superblocks are indexed on server only - all inodes, dentries, etc. associated with a
+ * particular server are held in the same superblock
+ * - NFS superblocks can have several effective roots to the dentry tree
+ * - directory type roots are spliced into the tree when a path from one root reaches the root
+ * of another (see nfs_lookup())
*/
#include <linux/config.h>
@@ -52,68 +57,14 @@ #include "internal.h"
#define NFSDBG_FACILITY NFSDBG_VFS
-/* Maximum number of readahead requests
- * FIXME: this should really be a sysctl so that users may tune it to suit
- * their needs. People that do NFS over a slow network, might for
- * instance want to reduce it to something closer to 1 for improved
- * interactive response.
- */
-#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
-
-/*
- * RPC cruft for NFS
- */
-static struct rpc_version * nfs_version[] = {
- NULL,
- NULL,
- &nfs_version2,
-#if defined(CONFIG_NFS_V3)
- &nfs_version3,
-#elif defined(CONFIG_NFS_V4)
- NULL,
-#endif
-#if defined(CONFIG_NFS_V4)
- &nfs_version4,
-#endif
-};
-
-static struct rpc_program nfs_program = {
- .name = "nfs",
- .number = NFS_PROGRAM,
- .nrvers = ARRAY_SIZE(nfs_version),
- .version = nfs_version,
- .stats = &nfs_rpcstat,
- .pipe_dir_name = "/nfs",
-};
-
-struct rpc_stat nfs_rpcstat = {
- .program = &nfs_program
-};
-
-
-#ifdef CONFIG_NFS_V3_ACL
-static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
-static struct rpc_version * nfsacl_version[] = {
- [3] = &nfsacl_version3,
-};
-
-struct rpc_program nfsacl_program = {
- .name = "nfsacl",
- .number = NFS_ACL_PROGRAM,
- .nrvers = ARRAY_SIZE(nfsacl_version),
- .version = nfsacl_version,
- .stats = &nfsacl_rpcstat,
-};
-#endif /* CONFIG_NFS_V3_ACL */
-
static void nfs_umount_begin(struct vfsmount *, int);
static int nfs_statfs(struct dentry *, struct kstatfs *);
static int nfs_show_options(struct seq_file *, struct vfsmount *);
static int nfs_show_stats(struct seq_file *, struct vfsmount *);
-static int nfs_get_sb(struct file_system_type *, int, const char *, void *,
- struct vfsmount *);
-static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *);
+static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *);
+static int nfs_xdev_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data,
+ struct vfsmount *mnt);
static void nfs_kill_super(struct super_block *);
static struct file_system_type nfs_fs_type = {
@@ -124,10 +75,10 @@ static struct file_system_type nfs_fs_ty
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-struct file_system_type clone_nfs_fs_type = {
+struct file_system_type nfs_xdev_fs_type = {
.owner = THIS_MODULE,
.name = "nfs",
- .get_sb = nfs_clone_nfs_sb,
+ .get_sb = nfs_xdev_get_sb,
.kill_sb = nfs_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
@@ -147,10 +98,10 @@ static struct super_operations nfs_sops
#ifdef CONFIG_NFS_V4
static int nfs4_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
-static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
-static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs4_xdev_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
+static int nfs4_referral_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt);
static void nfs4_kill_super(struct super_block *sb);
static struct file_system_type nfs4_fs_type = {
@@ -161,18 +112,18 @@ static struct file_system_type nfs4_fs_t
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-struct file_system_type clone_nfs4_fs_type = {
+struct file_system_type nfs4_xdev_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
- .get_sb = nfs_clone_nfs4_sb,
+ .get_sb = nfs4_xdev_get_sb,
.kill_sb = nfs4_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
-struct file_system_type nfs_referral_nfs4_fs_type = {
+struct file_system_type nfs4_referral_fs_type = {
.owner = THIS_MODULE,
.name = "nfs4",
- .get_sb = nfs_referral_nfs4_sb,
+ .get_sb = nfs4_referral_get_sb,
.kill_sb = nfs4_kill_super,
.fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
};
@@ -287,7 +238,7 @@ static int nfs_statfs(struct dentry *den
lock_kernel();
- error = server->rpc_ops->statfs(server, rootfh, &res);
+ error = server->nfs_client->rpc_ops->statfs(server, rootfh, &res);
buf->f_type = NFS_SUPER_MAGIC;
if (error < 0)
goto out_err;
@@ -316,7 +267,7 @@ static int nfs_statfs(struct dentry *den
buf->f_files = res.tfiles;
buf->f_ffree = res.afiles;
- buf->f_namelen = server->namelen;
+ buf->f_namelen = server->nfs_client->namelen;
out:
unlock_kernel();
return 0;
@@ -333,7 +284,7 @@ static int nfs_statfs(struct dentry *den
*/
static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
{
- static struct proc_nfs_info {
+ static const struct proc_nfs_info {
int flag;
char *str;
char *nostr;
@@ -346,28 +297,29 @@ static void nfs_show_mount_options(struc
{ NFS_MOUNT_NOACL, ",noacl", "" },
{ 0, NULL, NULL }
};
- struct proc_nfs_info *nfs_infop;
+ const struct proc_nfs_info *nfs_infop;
+ struct nfs_client *clp = nfss->nfs_client;
char buf[12];
char *proto;
- seq_printf(m, ",vers=%d", nfss->rpc_ops->version);
- seq_printf(m, ",rsize=%d", nfss->rsize);
- seq_printf(m, ",wsize=%d", nfss->wsize);
- if (nfss->acregmin != 3*HZ || showdefaults)
- seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
- if (nfss->acregmax != 60*HZ || showdefaults)
- seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
- if (nfss->acdirmin != 30*HZ || showdefaults)
- seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
- if (nfss->acdirmax != 60*HZ || showdefaults)
- seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
+ seq_printf(m, ",vers=%d", clp->rpc_ops->version);
+ seq_printf(m, ",rsize=%d", clp->rsize);
+ seq_printf(m, ",wsize=%d", clp->wsize);
+ if (clp->acregmin != 3*HZ || showdefaults)
+ seq_printf(m, ",acregmin=%d", clp->acregmin/HZ);
+ if (clp->acregmax != 60*HZ || showdefaults)
+ seq_printf(m, ",acregmax=%d", clp->acregmax/HZ);
+ if (clp->acdirmin != 30*HZ || showdefaults)
+ seq_printf(m, ",acdirmin=%d", clp->acdirmin/HZ);
+ if (clp->acdirmax != 60*HZ || showdefaults)
+ seq_printf(m, ",acdirmax=%d", clp->acdirmax/HZ);
for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
- if (nfss->flags & nfs_infop->flag)
+ if (clp->flags & nfs_infop->flag)
seq_puts(m, nfs_infop->str);
else
seq_puts(m, nfs_infop->nostr);
}
- switch (nfss->client->cl_xprt->prot) {
+ switch (clp->client->cl_xprt->prot) {
case IPPROTO_TCP:
proto = "tcp";
break;
@@ -375,12 +327,12 @@ static void nfs_show_mount_options(struc
proto = "udp";
break;
default:
- snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
+ snprintf(buf, sizeof(buf), "%u", clp->client->cl_xprt->prot);
proto = buf;
}
seq_printf(m, ",proto=%s", proto);
- seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ);
- seq_printf(m, ",retrans=%u", nfss->retrans_count);
+ seq_printf(m, ",timeo=%lu", 10U * clp->retrans_timeo / HZ);
+ seq_printf(m, ",retrans=%u", clp->retrans_count);
}
/*
@@ -393,7 +345,7 @@ static int nfs_show_options(struct seq_f
nfs_show_mount_options(m, nfss, 0);
seq_puts(m, ",addr=");
- seq_escape(m, nfss->hostname, " \t\n\\");
+ seq_escape(m, nfss->nfs_client->hostname, " \t\n\\");
return 0;
}
@@ -405,7 +357,8 @@ static int nfs_show_stats(struct seq_fil
{
int i, cpu;
struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
- struct rpc_auth *auth = nfss->client->cl_auth;
+ struct nfs_client *clp = nfss->nfs_client;
+ struct rpc_auth *auth = clp->client->cl_auth;
struct nfs_iostats totals = { };
seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
@@ -424,13 +377,13 @@ static int nfs_show_stats(struct seq_fil
seq_printf(m, "\n\tcaps:\t");
seq_printf(m, "caps=0x%x", nfss->caps);
- seq_printf(m, ",wtmult=%d", nfss->wtmult);
- seq_printf(m, ",dtsize=%d", nfss->dtsize);
- seq_printf(m, ",bsize=%d", nfss->bsize);
- seq_printf(m, ",namelen=%d", nfss->namelen);
+ seq_printf(m, ",wtmult=%d", clp->wtmult);
+ seq_printf(m, ",dtsize=%d", clp->dtsize);
+ seq_printf(m, ",bsize=%d", clp->bsize);
+ seq_printf(m, ",namelen=%d", clp->namelen);
#ifdef CONFIG_NFS_V4
- if (nfss->rpc_ops->version == 4) {
+ if (clp->rpc_ops->version == 4) {
seq_printf(m, "\n\tnfsv4:\t");
seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]);
seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]);
@@ -470,787 +423,358 @@ #endif
seq_printf(m, "%Lu ", totals.bytes[i]);
seq_printf(m, "\n");
- rpc_print_iostats(m, nfss->client);
+ rpc_print_iostats(m, clp->client);
return 0;
}
/*
* Begin unmount by attempting to remove all automounted mountpoints we added
- * in response to traversals
+ * in response to xdev traversals and referrals
*/
static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags)
{
- struct nfs_server *server;
- struct rpc_clnt *rpc;
-
shrink_submounts(vfsmnt, &nfs_automount_list);
- if (!(flags & MNT_FORCE))
- return;
- /* -EIO all pending I/O */
- server = NFS_SB(vfsmnt->mnt_sb);
- rpc = server->client;
- if (!IS_ERR(rpc))
- rpc_killall_tasks(rpc);
- rpc = server->client_acl;
- if (!IS_ERR(rpc))
- rpc_killall_tasks(rpc);
}
/*
- * Obtain the root inode of the file system.
+ * Validate the NFS2/NFS3 mount data
+ * - fills in the mount root filehandle
*/
-static struct inode *
-nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
+static int nfs_validate_mount_data(struct nfs_mount_data *data,
+ struct nfs_fh *mntfh)
{
- struct nfs_server *server = NFS_SB(sb);
- int error;
-
- error = server->rpc_ops->getroot(server, rootfh, fsinfo);
- if (error < 0) {
- dprintk("nfs_get_root: getattr error = %d\n", -error);
- return ERR_PTR(error);
+ if (data == NULL) {
+ dprintk("%s: missing data argument\n", __FUNCTION__);
+ return -EINVAL;
}
- server->fsid = fsinfo->fattr->fsid;
- return nfs_fhget(sb, rootfh, fsinfo->fattr);
-}
-
-/*
- * Do NFS version-independent mount processing, and sanity checking
- */
-static int
-nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
-{
- struct nfs_server *server;
- struct inode *root_inode;
- struct nfs_fattr fattr;
- struct nfs_fsinfo fsinfo = {
- .fattr = &fattr,
- };
- struct nfs_pathconf pathinfo = {
- .fattr = &fattr,
- };
- int no_root_error = 0;
- unsigned long max_rpc_payload;
-
- /* We probably want something more informative here */
- snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
-
- server = NFS_SB(sb);
-
- sb->s_magic = NFS_SUPER_MAGIC;
-
- server->io_stats = nfs_alloc_iostats();
- if (server->io_stats == NULL)
- return -ENOMEM;
+ if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
+ dprintk("%s: bad mount version\n", __FUNCTION__);
+ return -EINVAL;
+ }
- root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
- /* Did getting the root inode fail? */
- if (IS_ERR(root_inode)) {
- no_root_error = PTR_ERR(root_inode);
- goto out_no_root;
+ switch (data->version) {
+ case 1:
+ data->namlen = 0;
+ case 2:
+ data->bsize = 0;
+ case 3:
+ if (data->flags & NFS_MOUNT_VER3) {
+ dprintk("%s: mount structure version %d does not support NFSv3\n",
+ __FUNCTION__,
+ data->version);
+ return -EINVAL;
+ }
+ data->root.size = NFS2_FHSIZE;
+ memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
+ case 4:
+ if (data->flags & NFS_MOUNT_SECFLAVOUR) {
+ dprintk("%s: mount structure version %d does not support strong security\n",
+ __FUNCTION__,
+ data->version);
+ return -EINVAL;
+ }
+ /* Fill in pseudoflavor for mount version < 5 */
+ data->pseudoflavor = RPC_AUTH_UNIX;
+ case 5:
+ memset(data->context, 0, sizeof(data->context));
}
- sb->s_root = d_alloc_root(root_inode);
- if (!sb->s_root) {
- no_root_error = -ENOMEM;
- goto out_no_root;
+
+#ifndef CONFIG_NFS_V3
+ /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
+ if (data->flags & NFS_MOUNT_VER3) {
+ dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
+ return -EPROTONOSUPPORT;
}
- sb->s_root->d_op = server->rpc_ops->dentry_ops;
-
- /* mount time stamp, in seconds */
- server->mount_time = jiffies;
-
- /* Get some general file system info */
- if (server->namelen == 0 &&
- server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
- server->namelen = pathinfo.max_namelen;
- /* Work out a lot of parameters */
- if (server->rsize == 0)
- server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
- if (server->wsize == 0)
- server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
-
- if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
- server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
- if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
- server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
-
- max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
- if (server->rsize > max_rpc_payload)
- server->rsize = max_rpc_payload;
- if (server->rsize > NFS_MAX_FILE_IO_SIZE)
- server->rsize = NFS_MAX_FILE_IO_SIZE;
- server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-
- if (server->wsize > max_rpc_payload)
- server->wsize = max_rpc_payload;
- if (server->wsize > NFS_MAX_FILE_IO_SIZE)
- server->wsize = NFS_MAX_FILE_IO_SIZE;
- server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+#endif /* CONFIG_NFS_V3 */
- if (sb->s_blocksize == 0)
- sb->s_blocksize = nfs_block_bits(server->wsize,
- &sb->s_blocksize_bits);
- server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
-
- server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
- if (server->dtsize > PAGE_CACHE_SIZE)
- server->dtsize = PAGE_CACHE_SIZE;
- if (server->dtsize > server->rsize)
- server->dtsize = server->rsize;
-
- if (server->flags & NFS_MOUNT_NOAC) {
- server->acregmin = server->acregmax = 0;
- server->acdirmin = server->acdirmax = 0;
- sb->s_flags |= MS_SYNCHRONOUS;
+ /* We now require that the mount process passes the remote address */
+ if (data->addr.sin_addr.s_addr == INADDR_ANY) {
+ dprintk("%s: mount program didn't pass remote address!\n",
+ __FUNCTION__);
+ return -EINVAL;
}
- server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
- nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
+ /* Prepare the root filehandle */
+ if (data->flags & NFS_MOUNT_VER3)
+ mntfh->size = data->root.size;
+ else
+ mntfh->size = NFS2_FHSIZE;
+
+ if (mntfh->size > sizeof(mntfh->data)) {
+ dprintk("%s: invalid root filehandle\n", __FUNCTION__);
+ return -EINVAL;
+ }
- server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
- server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
+ memcpy(mntfh->data, data->root.data, mntfh->size);
+ if (mntfh->size < sizeof(mntfh->data))
+ memset(mntfh->data + mntfh->size, 0,
+ sizeof(mntfh->data) - mntfh->size);
- /* We're airborne Set socket buffersize */
- rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
return 0;
- /* Yargs. It didn't work out. */
-out_no_root:
- dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
- if (!IS_ERR(root_inode))
- iput(root_inode);
- return no_root_error;
}
/*
- * Initialise the timeout values for a connection
+ * Initialise the common bits of the superblock
*/
-static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
+static inline void nfs_initialise_sb(struct super_block *sb)
{
- to->to_initval = timeo * HZ / 10;
- to->to_retries = retrans;
- if (!to->to_retries)
- to->to_retries = 2;
-
- switch (proto) {
- case IPPROTO_TCP:
- if (!to->to_initval)
- to->to_initval = 60 * HZ;
- if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
- to->to_initval = NFS_MAX_TCP_TIMEOUT;
- to->to_increment = to->to_initval;
- to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
- to->to_exponential = 0;
- break;
- case IPPROTO_UDP:
- default:
- if (!to->to_initval)
- to->to_initval = 11 * HZ / 10;
- if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
- to->to_initval = NFS_MAX_UDP_TIMEOUT;
- to->to_maxval = NFS_MAX_UDP_TIMEOUT;
- to->to_exponential = 1;
- break;
- }
-}
+ struct nfs_server *server = NFS_SB(sb);
-/*
- * Create an RPC client handle.
- */
-static struct rpc_clnt *
-nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
-{
- struct rpc_timeout timeparms;
- struct rpc_xprt *xprt = NULL;
- struct rpc_clnt *clnt = NULL;
- int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
-
- nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
-
- server->retrans_timeo = timeparms.to_initval;
- server->retrans_count = timeparms.to_retries;
-
- /* create transport and client */
- xprt = xprt_create_proto(proto, &server->addr, &timeparms);
- if (IS_ERR(xprt)) {
- dprintk("%s: cannot create RPC transport. Error = %ld\n",
- __FUNCTION__, PTR_ERR(xprt));
- return (struct rpc_clnt *)xprt;
- }
- clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
- server->rpc_ops->version, data->pseudoflavor);
- if (IS_ERR(clnt)) {
- dprintk("%s: cannot create RPC client. Error = %ld\n",
- __FUNCTION__, PTR_ERR(xprt));
- goto out_fail;
- }
+ sb->s_magic = NFS_SUPER_MAGIC;
- clnt->cl_intr = 1;
- clnt->cl_softrtry = 1;
+ /* We probably want something more informative here */
+ snprintf(sb->s_id, sizeof(sb->s_id),
+ "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
+
+ if (sb->s_blocksize == 0)
+ sb->s_blocksize = nfs_block_bits(server->nfs_client->wsize,
+ &sb->s_blocksize_bits);
- return clnt;
+ if (server->nfs_client->flags & NFS_MOUNT_NOAC)
+ sb->s_flags |= MS_SYNCHRONOUS;
-out_fail:
- return clnt;
+ nfs_super_set_maxbytes(sb, server->maxfilesize);
}
/*
- * Clone a server record
+ * Finish setting up an NFS2/3 superblock
*/
-static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data)
+static void nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data)
{
struct nfs_server *server = NFS_SB(sb);
- struct nfs_server *parent = NFS_SB(data->sb);
- struct inode *root_inode;
- struct nfs_fsinfo fsinfo;
- void *err = ERR_PTR(-ENOMEM);
-
- sb->s_op = data->sb->s_op;
- sb->s_blocksize = data->sb->s_blocksize;
- sb->s_blocksize_bits = data->sb->s_blocksize_bits;
- sb->s_maxbytes = data->sb->s_maxbytes;
-
- server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
- server->io_stats = nfs_alloc_iostats();
- if (server->io_stats == NULL)
- goto out;
-
- server->client = rpc_clone_client(parent->client);
- if (IS_ERR((err = server->client)))
- goto out;
-
- if (!IS_ERR(parent->client_sys)) {
- server->client_sys = rpc_clone_client(parent->client_sys);
- if (IS_ERR((err = server->client_sys)))
- goto out;
- }
- if (!IS_ERR(parent->client_acl)) {
- server->client_acl = rpc_clone_client(parent->client_acl);
- if (IS_ERR((err = server->client_acl)))
- goto out;
- }
- root_inode = nfs_fhget(sb, data->fh, data->fattr);
- if (!root_inode)
- goto out;
- sb->s_root = d_alloc_root(root_inode);
- if (!sb->s_root)
- goto out_put_root;
- fsinfo.fattr = data->fattr;
- if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0)
- nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
- sb->s_root->d_op = server->rpc_ops->dentry_ops;
- sb->s_flags |= MS_ACTIVE;
- return server;
-out_put_root:
- iput(root_inode);
-out:
- return err;
-}
-/*
- * Copy an existing superblock and attach revised data
- */
-static int nfs_clone_generic_sb(struct nfs_clone_mount *data,
- struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *),
- struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *),
- struct vfsmount *mnt)
-{
- struct nfs_server *server;
- struct nfs_server *parent = NFS_SB(data->sb);
- struct super_block *sb = ERR_PTR(-EINVAL);
- int err = -ENOMEM;
- char *hostname;
- int len;
-
- server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (server == NULL)
- goto out_err;
- memcpy(server, parent, sizeof(*server));
- hostname = (data->hostname != NULL) ? data->hostname : parent->hostname;
- len = strlen(hostname) + 1;
- server->hostname = kmalloc(len, GFP_KERNEL);
- if (server->hostname == NULL)
- goto free_server;
- memcpy(server->hostname, hostname, len);
- if (rpciod_up() != 0)
- goto free_hostname;
-
- sb = fill_sb(server, data);
- if (IS_ERR(sb) < 0) {
- err = PTR_ERR(sb);
- goto kill_rpciod;
- }
+ sb->s_blocksize_bits = 0;
+ sb->s_blocksize = 0;
+ if (data->bsize)
+ sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
- if (sb->s_root) {
- rpciod_down();
- kfree(server->hostname);
- kfree(server);
- return simple_set_mnt(mnt, sb);
+ if (server->nfs_client->flags & NFS_MOUNT_VER3) {
+ /* The VFS shouldn't apply the umask to mode bits. We will do
+ * so ourselves when necessary.
+ */
+ sb->s_flags |= MS_POSIXACL;
+ sb->s_time_gran = 1;
}
- server = fill_server(mnt->mnt_sb, data);
- if (IS_ERR(server)) {
- err = PTR_ERR(server);
- goto out_deactivate;
- }
- return simple_set_mnt(mnt, sb);
-out_deactivate:
- up_write(&sb->s_umount);
- deactivate_super(sb);
- return err;
-kill_rpciod:
- rpciod_down();
-free_hostname:
- kfree(server->hostname);
-free_server:
- kfree(server);
-out_err:
- return err;
+ sb->s_op = &nfs_sops;
+ nfs_initialise_sb(sb);
}
/*
- * Set up an NFS2/3 superblock
- *
- * The way this works is that the mount process passes a structure
- * in the data argument which contains the server's IP address
- * and the root file handle obtained from the server's mount
- * daemon. We stash these away in the private superblock fields.
+ * Finish setting up a cloned NFS2/3 superblock
*/
-static int
-nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
+static void nfs_clone_super(struct super_block *sb,
+ const struct super_block *old_sb)
{
- struct nfs_server *server;
- rpc_authflavor_t authflavor;
+ struct nfs_server *server = NFS_SB(sb);
- server = NFS_SB(sb);
- sb->s_blocksize_bits = 0;
- sb->s_blocksize = 0;
- if (data->bsize)
- sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
- if (data->rsize)
- server->rsize = nfs_block_size(data->rsize, NULL);
- if (data->wsize)
- server->wsize = nfs_block_size(data->wsize, NULL);
- server->flags = data->flags & NFS_MOUNT_FLAGMASK;
-
- server->acregmin = data->acregmin*HZ;
- server->acregmax = data->acregmax*HZ;
- server->acdirmin = data->acdirmin*HZ;
- server->acdirmax = data->acdirmax*HZ;
-
- /* Start lockd here, before we might error out */
- if (!(server->flags & NFS_MOUNT_NONLM))
- lockd_up();
-
- server->namelen = data->namlen;
- server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
- if (!server->hostname)
- return -ENOMEM;
- strcpy(server->hostname, data->hostname);
-
- /* Check NFS protocol revision and initialize RPC op vector
- * and file handle pool. */
-#ifdef CONFIG_NFS_V3
- if (server->flags & NFS_MOUNT_VER3) {
- server->rpc_ops = &nfs_v3_clientops;
- server->caps |= NFS_CAP_READDIRPLUS;
- } else {
- server->rpc_ops = &nfs_v2_clientops;
- }
-#else
- server->rpc_ops = &nfs_v2_clientops;
-#endif
+ sb->s_blocksize_bits = old_sb->s_blocksize_bits;
+ sb->s_blocksize = old_sb->s_blocksize;
+ sb->s_maxbytes = old_sb->s_maxbytes;
- /* Fill in pseudoflavor for mount version < 5 */
- if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
- data->pseudoflavor = RPC_AUTH_UNIX;
- authflavor = data->pseudoflavor; /* save for sb_init() */
- /* XXX maybe we want to add a server->pseudoflavor field */
-
- /* Create RPC client handles */
- server->client = nfs_create_client(server, data);
- if (IS_ERR(server->client))
- return PTR_ERR(server->client);
- /* RFC 2623, sec 2.3.2 */
- if (authflavor != RPC_AUTH_UNIX) {
- struct rpc_auth *auth;
-
- server->client_sys = rpc_clone_client(server->client);
- if (IS_ERR(server->client_sys))
- return PTR_ERR(server->client_sys);
- auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
- if (IS_ERR(auth))
- return PTR_ERR(auth);
- } else {
- atomic_inc(&server->client->cl_count);
- server->client_sys = server->client;
- }
- if (server->flags & NFS_MOUNT_VER3) {
-#ifdef CONFIG_NFS_V3_ACL
- if (!(server->flags & NFS_MOUNT_NOACL)) {
- server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
- /* No errors! Assume that Sun nfsacls are supported */
- if (!IS_ERR(server->client_acl))
- server->caps |= NFS_CAP_ACLS;
- }
-#else
- server->flags &= ~NFS_MOUNT_NOACL;
-#endif /* CONFIG_NFS_V3_ACL */
- /*
- * The VFS shouldn't apply the umask to mode bits. We will
- * do so ourselves when necessary.
+ if (server->nfs_client->flags & NFS_MOUNT_VER3) {
+ /* The VFS shouldn't apply the umask to mode bits. We will do
+ * so ourselves when necessary.
*/
sb->s_flags |= MS_POSIXACL;
- if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
- server->namelen = NFS3_MAXNAMLEN;
sb->s_time_gran = 1;
- } else {
- if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
- server->namelen = NFS2_MAXNAMLEN;
}
- sb->s_op = &nfs_sops;
- return nfs_sb_init(sb, authflavor);
+ sb->s_op = old_sb->s_op;
+ nfs_initialise_sb(sb);
}
-static int nfs_set_super(struct super_block *s, void *data)
+static int nfs_set_super(struct super_block *s, void *_server)
{
- s->s_fs_info = data;
- return set_anon_super(s, data);
+ struct nfs_server *server = _server;
+ int ret;
+
+ s->s_fs_info = server;
+ ret = set_anon_super(s, server);
+ if (ret == 0)
+ server->s_dev = s->s_dev;
+ return ret;
}
static int nfs_compare_super(struct super_block *sb, void *data)
{
- struct nfs_server *server = data;
- struct nfs_server *old = NFS_SB(sb);
+ struct nfs_server *server = data, *old = NFS_SB(sb);
- if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
+ if (old->nfs_client != server->nfs_client)
return 0;
- if (old->addr.sin_port != server->addr.sin_port)
+ if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0)
return 0;
- return !nfs_compare_fh(&old->fh, &server->fh);
+ return 1;
}
static int nfs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
- int error;
struct nfs_server *server = NULL;
struct super_block *s;
- struct nfs_fh *root;
+ struct nfs_fh mntfh;
struct nfs_mount_data *data = raw_data;
+ struct dentry *mntroot;
+ int error;
- error = -EINVAL;
- if (data == NULL) {
- dprintk("%s: missing data argument\n", __FUNCTION__);
- goto out_err_noserver;
- }
- if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
- dprintk("%s: bad mount version\n", __FUNCTION__);
- goto out_err_noserver;
- }
- switch (data->version) {
- case 1:
- data->namlen = 0;
- case 2:
- data->bsize = 0;
- case 3:
- if (data->flags & NFS_MOUNT_VER3) {
- dprintk("%s: mount structure version %d does not support NFSv3\n",
- __FUNCTION__,
- data->version);
- goto out_err_noserver;
- }
- data->root.size = NFS2_FHSIZE;
- memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
- case 4:
- if (data->flags & NFS_MOUNT_SECFLAVOUR) {
- dprintk("%s: mount structure version %d does not support strong security\n",
- __FUNCTION__,
- data->version);
- goto out_err_noserver;
- }
- case 5:
- memset(data->context, 0, sizeof(data->context));
- }
-#ifndef CONFIG_NFS_V3
- /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
- error = -EPROTONOSUPPORT;
- if (data->flags & NFS_MOUNT_VER3) {
- dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
- goto out_err_noserver;
- }
-#endif /* CONFIG_NFS_V3 */
+ /* Validate the mount data */
+ error = nfs_validate_mount_data(data, &mntfh);
+ if (error < 0)
+ return error;
- error = -ENOMEM;
- server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (!server)
+ /* Get a volume representation */
+ server = nfs_create_server(data, &mntfh);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
goto out_err_noserver;
- /* Zero out the NFS state stuff */
- init_nfsv4_state(server);
- server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
-
- root = &server->fh;
- if (data->flags & NFS_MOUNT_VER3)
- root->size = data->root.size;
- else
- root->size = NFS2_FHSIZE;
- error = -EINVAL;
- if (root->size > sizeof(root->data)) {
- dprintk("%s: invalid root filehandle\n", __FUNCTION__);
- goto out_err;
- }
- memcpy(root->data, data->root.data, root->size);
-
- /* We now require that the mount process passes the remote address */
- memcpy(&server->addr, &data->addr, sizeof(server->addr));
- if (server->addr.sin_addr.s_addr == INADDR_ANY) {
- dprintk("%s: mount program didn't pass remote address!\n",
- __FUNCTION__);
- goto out_err;
- }
-
- /* Fire up rpciod if not yet running */
- error = rpciod_up();
- if (error < 0) {
- dprintk("%s: couldn't start rpciod! Error = %d\n",
- __FUNCTION__, error);
- goto out_err;
}
+ /* Get a superblock - note that we may end up sharing one that already exists */
s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
if (IS_ERR(s)) {
error = PTR_ERR(s);
- goto out_err_rpciod;
+ goto out_err_nosb;
}
- if (s->s_root)
- goto out_rpciod_down;
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
+ }
- s->s_flags = flags;
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
+ nfs_fill_super(s, data);
+ }
- error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
- if (error) {
- up_write(&s->s_umount);
- deactivate_super(s);
- return error;
+ mntroot = nfs_get_root(s, &mntfh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
}
- s->s_flags |= MS_ACTIVE;
- return simple_set_mnt(mnt, s);
-out_rpciod_down:
- rpciod_down();
- kfree(server);
- return simple_set_mnt(mnt, s);
+ s->s_flags |= MS_ACTIVE;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
+ return 0;
-out_err_rpciod:
- rpciod_down();
-out_err:
- kfree(server);
+out_err_nosb:
+ nfs_free_server(server);
out_err_noserver:
return error;
+
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ return error;
}
+/*
+ * Destroy an NFS2/3 superblock
+ */
static void nfs_kill_super(struct super_block *s)
{
struct nfs_server *server = NFS_SB(s);
kill_anon_super(s);
-
- if (!IS_ERR(server->client))
- rpc_shutdown_client(server->client);
- if (!IS_ERR(server->client_sys))
- rpc_shutdown_client(server->client_sys);
- if (!IS_ERR(server->client_acl))
- rpc_shutdown_client(server->client_acl);
-
- if (!(server->flags & NFS_MOUNT_NONLM))
- lockd_down(); /* release rpc.lockd */
-
- rpciod_down(); /* release rpciod */
-
- nfs_free_iostats(server->io_stats);
- kfree(server->hostname);
- kfree(server);
- nfs_release_automount_timer();
-}
-
-static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
-{
- struct super_block *sb;
-
- server->fsid = data->fattr->fsid;
- nfs_copy_fh(&server->fh, data->fh);
- sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
- if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM))
- lockd_up();
- return sb;
+ nfs_free_server(server);
}
-static int nfs_clone_nfs_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
+/*
+ * Clone an NFS2/3 server record on xdev traversal (FSID-change)
+ */
+static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
{
struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server, mnt);
-}
+ struct super_block *s;
+ struct nfs_server *server;
+ struct dentry *mntroot;
+ int error;
-#ifdef CONFIG_NFS_V4
-static struct rpc_clnt *nfs4_create_client(struct nfs_server *server,
- struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor)
-{
- struct nfs4_client *clp;
- struct rpc_xprt *xprt = NULL;
- struct rpc_clnt *clnt = NULL;
- int err = -EIO;
-
- clp = nfs4_get_client(&server->addr.sin_addr);
- if (!clp) {
- dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
- return ERR_PTR(err);
- }
+ dprintk("--> nfs_xdev_get_sb()\n");
- /* Now create transport and client */
- down_write(&clp->cl_sem);
- if (IS_ERR(clp->cl_rpcclient)) {
- xprt = xprt_create_proto(proto, &server->addr, timeparms);
- if (IS_ERR(xprt)) {
- up_write(&clp->cl_sem);
- err = PTR_ERR(xprt);
- dprintk("%s: cannot create RPC transport. Error = %d\n",
- __FUNCTION__, err);
- goto out_fail;
- }
- /* Bind to a reserved port! */
- xprt->resvport = 1;
- clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
- server->rpc_ops->version, flavor);
- if (IS_ERR(clnt)) {
- up_write(&clp->cl_sem);
- err = PTR_ERR(clnt);
- dprintk("%s: cannot create RPC client. Error = %d\n",
- __FUNCTION__, err);
- goto out_fail;
- }
- clnt->cl_intr = 1;
- clnt->cl_softrtry = 1;
- clp->cl_rpcclient = clnt;
- memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
- nfs_idmap_new(clp);
- }
- list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
- clnt = rpc_clone_client(clp->cl_rpcclient);
- if (!IS_ERR(clnt))
- server->nfs4_state = clp;
- up_write(&clp->cl_sem);
- clp = NULL;
-
- if (IS_ERR(clnt)) {
- dprintk("%s: cannot create RPC client. Error = %d\n",
- __FUNCTION__, err);
- return clnt;
+ /* create a new volume representation */
+ server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
}
- if (server->nfs4_state->cl_idmap == NULL) {
- dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
- return ERR_PTR(-ENOMEM);
+ /* Get a superblock - note that we may end up sharing one that already exists */
+ s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_err_nosb;
}
- if (clnt->cl_auth->au_flavor != flavor) {
- struct rpc_auth *auth;
-
- auth = rpcauth_create(flavor, clnt);
- if (IS_ERR(auth)) {
- dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
- return (struct rpc_clnt *)auth;
- }
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
}
- return clnt;
-
- out_fail:
- if (clp)
- nfs4_put_client(clp);
- return ERR_PTR(err);
-}
-
-/*
- * Set up an NFS4 superblock
- */
-static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
-{
- struct nfs_server *server;
- struct rpc_timeout timeparms;
- rpc_authflavor_t authflavour;
- int err = -EIO;
- sb->s_blocksize_bits = 0;
- sb->s_blocksize = 0;
- server = NFS_SB(sb);
- if (data->rsize != 0)
- server->rsize = nfs_block_size(data->rsize, NULL);
- if (data->wsize != 0)
- server->wsize = nfs_block_size(data->wsize, NULL);
- server->flags = data->flags & NFS_MOUNT_FLAGMASK;
- server->caps = NFS_CAP_ATOMIC_OPEN;
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
+ nfs_clone_super(s, data->sb);
+ }
- server->acregmin = data->acregmin*HZ;
- server->acregmax = data->acregmax*HZ;
- server->acdirmin = data->acdirmin*HZ;
- server->acdirmax = data->acdirmax*HZ;
+ mntroot = nfs_get_root(s, data->fh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
+ }
- server->rpc_ops = &nfs_v4_clientops;
+ s->s_flags |= MS_ACTIVE;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
- nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
+ dprintk("<-- nfs_xdev_get_sb() = 0\n");
+ return 0;
- server->retrans_timeo = timeparms.to_initval;
- server->retrans_count = timeparms.to_retries;
+out_err_nosb:
+ nfs_free_server(server);
+out_err_noserver:
+ dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error);
+ return error;
- /* Now create transport and client */
- authflavour = RPC_AUTH_UNIX;
- if (data->auth_flavourlen != 0) {
- if (data->auth_flavourlen != 1) {
- dprintk("%s: Invalid number of RPC auth flavours %d.\n",
- __FUNCTION__, data->auth_flavourlen);
- err = -EINVAL;
- goto out_fail;
- }
- if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
- err = -EFAULT;
- goto out_fail;
- }
- }
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error);
+ return error;
+}
- server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour);
- if (IS_ERR(server->client)) {
- err = PTR_ERR(server->client);
- dprintk("%s: cannot create RPC client. Error = %d\n",
- __FUNCTION__, err);
- goto out_fail;
- }
+#ifdef CONFIG_NFS_V4
+/*
+ * Finish setting up a cloned NFS4 superblock
+ */
+static void nfs4_clone_super(struct super_block *sb,
+ const struct super_block *old_sb)
+{
+ sb->s_blocksize_bits = old_sb->s_blocksize_bits;
+ sb->s_blocksize = old_sb->s_blocksize;
+ sb->s_maxbytes = old_sb->s_maxbytes;
sb->s_time_gran = 1;
-
- sb->s_op = &nfs4_sops;
- err = nfs_sb_init(sb, authflavour);
-
- out_fail:
- return err;
+ sb->s_op = old_sb->s_op;
+ nfs_initialise_sb(sb);
}
-static int nfs4_compare_super(struct super_block *sb, void *data)
+/*
+ * Set up an NFS4 superblock
+ */
+static void nfs4_fill_super(struct super_block *sb)
{
- struct nfs_server *server = data;
- struct nfs_server *old = NFS_SB(sb);
-
- if (strcmp(server->hostname, old->hostname) != 0)
- return 0;
- if (strcmp(server->mnt_path, old->mnt_path) != 0)
- return 0;
- return 1;
+ sb->s_time_gran = 1;
+ sb->s_op = &nfs4_sops;
+ nfs_initialise_sb(sb);
}
-static void *
-nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
+static void *nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
{
void *p = NULL;
@@ -1271,14 +795,22 @@ nfs_copy_user_string(char *dst, struct n
return dst;
}
+/*
+ * Get the superblock for an NFS4 mountpoint
+ */
static int nfs4_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
{
- int error;
- struct nfs_server *server;
- struct super_block *s;
struct nfs4_mount_data *data = raw_data;
+ struct super_block *s;
+ struct nfs_server *server;
+ struct sockaddr_in addr;
+ rpc_authflavor_t authflavour;
+ struct nfs_fh mntfh;
+ struct dentry *mntroot;
+ char *mntpath = NULL, *hostname = NULL, ip_addr[16];
void *p;
+ int error;
if (data == NULL) {
dprintk("%s: missing data argument\n", __FUNCTION__);
@@ -1289,83 +821,107 @@ static int nfs4_get_sb(struct file_syste
return -EINVAL;
}
- server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (!server)
- return -ENOMEM;
- /* Zero out the NFS state stuff */
- init_nfsv4_state(server);
- server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
+ /* We now require that the mount process passes the remote address */
+ if (data->host_addrlen != sizeof(addr))
+ return -EINVAL;
+
+ if (copy_from_user(&addr, data->host_addr, sizeof(addr)))
+ return -EFAULT;
+
+ if (addr.sin_family != AF_INET ||
+ addr.sin_addr.s_addr == INADDR_ANY
+ ) {
+ dprintk("%s: mount program didn't pass remote IP address!\n",
+ __FUNCTION__);
+ return -EINVAL;
+ }
+
+ /* Grab the authentication type */
+ authflavour = RPC_AUTH_UNIX;
+ if (data->auth_flavourlen != 0) {
+ if (data->auth_flavourlen != 1) {
+ dprintk("%s: Invalid number of RPC auth flavours %d.\n",
+ __FUNCTION__, data->auth_flavourlen);
+ error = -EINVAL;
+ goto out_err_noserver;
+ }
+
+ if (copy_from_user(&authflavour, data->auth_flavours,
+ sizeof(authflavour))) {
+ error = -EFAULT;
+ goto out_err_noserver;
+ }
+ }
p = nfs_copy_user_string(NULL, &data->hostname, 256);
if (IS_ERR(p))
goto out_err;
- server->hostname = p;
+ hostname = p;
p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
if (IS_ERR(p))
goto out_err;
- server->mnt_path = p;
+ mntpath = p;
+
+ dprintk("MNTPATH: %s\n", mntpath);
- p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
- sizeof(server->ip_addr) - 1);
+ p = nfs_copy_user_string(ip_addr, &data->client_addr,
+ sizeof(ip_addr) - 1);
if (IS_ERR(p))
goto out_err;
- /* We now require that the mount process passes the remote address */
- if (data->host_addrlen != sizeof(server->addr)) {
- error = -EINVAL;
- goto out_free;
- }
- if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
- error = -EFAULT;
- goto out_free;
- }
- if (server->addr.sin_family != AF_INET ||
- server->addr.sin_addr.s_addr == INADDR_ANY) {
- dprintk("%s: mount program didn't pass remote IP address!\n",
- __FUNCTION__);
- error = -EINVAL;
- goto out_free;
- }
-
- /* Fire up rpciod if not yet running */
- error = rpciod_up();
- if (error < 0) {
- dprintk("%s: couldn't start rpciod! Error = %d\n",
- __FUNCTION__, error);
- goto out_free;
+ /* Get a volume representation */
+ server = nfs4_create_server(data, hostname, &addr, mntpath, ip_addr,
+ authflavour, &mntfh);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
}
- s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
+ /* Get a superblock - note that we may end up sharing one that already exists */
+ s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_free;
}
- if (s->s_root) {
- kfree(server->mnt_path);
- kfree(server->hostname);
- kfree(server);
- return simple_set_mnt(mnt, s);
- }
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
- s->s_flags = flags;
+ nfs4_fill_super(s);
+ } else {
+ nfs_free_server(server);
+ }
- error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
- if (error) {
- up_write(&s->s_umount);
- deactivate_super(s);
- return error;
+ mntroot = nfs4_get_root(s, &mntfh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
}
+
s->s_flags |= MS_ACTIVE;
- return simple_set_mnt(mnt, s);
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
+ kfree(mntpath);
+ kfree(hostname);
+ return 0;
+
out_err:
error = PTR_ERR(p);
+ goto out_err_noserver;
+
out_free:
- kfree(server->mnt_path);
- kfree(server->hostname);
- kfree(server);
+ nfs_free_server(server);
+out_err_noserver:
+ kfree(mntpath);
+ kfree(hostname);
return error;
+
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ goto out_err_noserver;
}
static void nfs4_kill_super(struct super_block *sb)
@@ -1376,135 +932,140 @@ static void nfs4_kill_super(struct super
kill_anon_super(sb);
nfs4_renewd_prepare_shutdown(server);
+ nfs_free_server(server);
+}
+
+/*
+ * Clone an NFS4 server record on xdev traversal (FSID-change)
+ */
+static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
+{
+ struct nfs_clone_mount *data = raw_data;
+ struct super_block *s;
+ struct nfs_server *server;
+ struct dentry *mntroot;
+ int error;
+
+ dprintk("--> nfs4_xdev_get_sb()\n");
+
+ /* create a new volume representation */
+ server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
+ }
- if (server->client != NULL && !IS_ERR(server->client))
- rpc_shutdown_client(server->client);
+ /* Get a superblock - note that we may end up sharing one that already exists */
+ s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_err_nosb;
+ }
- destroy_nfsv4_state(server);
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
+ }
- rpciod_down();
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
+ nfs4_clone_super(s, data->sb);
+ }
- nfs_free_iostats(server->io_stats);
- kfree(server->hostname);
- kfree(server);
- nfs_release_automount_timer();
+ mntroot = nfs4_get_root(s, data->fh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
+ }
+
+ s->s_flags |= MS_ACTIVE;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
+
+ dprintk("<-- nfs4_xdev_get_sb() = 0\n");
+ return 0;
+
+out_err_nosb:
+ nfs_free_server(server);
+out_err_noserver:
+ dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error);
+ return error;
+
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error);
+ return error;
}
/*
- * Constructs the SERVER-side path
+ * Create an NFS4 server record on referral traversal
*/
-static inline char *nfs4_dup_path(const struct dentry *dentry)
+static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *raw_data,
+ struct vfsmount *mnt)
{
- char *page = (char *) __get_free_page(GFP_USER);
- char *path;
+ struct nfs_clone_mount *data = raw_data;
+ struct super_block *s;
+ struct nfs_server *server;
+ struct dentry *mntroot;
+ struct nfs_fh mntfh;
+ int error;
- path = nfs4_path(dentry, page, PAGE_SIZE);
- if (!IS_ERR(path)) {
- int len = PAGE_SIZE + page - path;
- char *tmp = path;
+ dprintk("--> nfs4_referral_get_sb()\n");
- path = kmalloc(len, GFP_KERNEL);
- if (path)
- memcpy(path, tmp, len);
- else
- path = ERR_PTR(-ENOMEM);
+ /* create a new volume representation */
+ server = nfs4_create_referral_server(data, &mntfh);
+ if (IS_ERR(server)) {
+ error = PTR_ERR(server);
+ goto out_err_noserver;
}
- free_page((unsigned long)page);
- return path;
-}
-static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data)
-{
- const struct dentry *dentry = data->dentry;
- struct nfs4_client *clp = server->nfs4_state;
- struct super_block *sb;
-
- server->fsid = data->fattr->fsid;
- nfs_copy_fh(&server->fh, data->fh);
- server->mnt_path = nfs4_dup_path(dentry);
- if (IS_ERR(server->mnt_path)) {
- sb = (struct super_block *)server->mnt_path;
- goto err;
+ /* Get a superblock - note that we may end up sharing one that already exists */
+ s = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server);
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_err_nosb;
}
- sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
- if (IS_ERR(sb) || sb->s_root)
- goto free_path;
- nfs4_server_capabilities(server, &server->fh);
-
- down_write(&clp->cl_sem);
- atomic_inc(&clp->cl_count);
- list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
- up_write(&clp->cl_sem);
- return sb;
-free_path:
- kfree(server->mnt_path);
-err:
- server->mnt_path = NULL;
- return sb;
-}
-static int nfs_clone_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
-{
- struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server, mnt);
-}
+ if (s->s_fs_info != server) {
+ nfs_free_server(server);
+ server = NULL;
+ }
-static struct super_block *nfs4_referral_sb(struct nfs_server *server, struct nfs_clone_mount *data)
-{
- struct super_block *sb = ERR_PTR(-ENOMEM);
- int len;
-
- len = strlen(data->mnt_path) + 1;
- server->mnt_path = kmalloc(len, GFP_KERNEL);
- if (server->mnt_path == NULL)
- goto err;
- memcpy(server->mnt_path, data->mnt_path, len);
- memcpy(&server->addr, data->addr, sizeof(struct sockaddr_in));
-
- sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server);
- if (IS_ERR(sb) || sb->s_root)
- goto free_path;
- return sb;
-free_path:
- kfree(server->mnt_path);
-err:
- server->mnt_path = NULL;
- return sb;
-}
+ if (!s->s_root) {
+ /* initial superblock/root creation */
+ s->s_flags = flags;
+ nfs4_fill_super(s);
+ }
-static struct nfs_server *nfs4_referral_server(struct super_block *sb, struct nfs_clone_mount *data)
-{
- struct nfs_server *server = NFS_SB(sb);
- struct rpc_timeout timeparms;
- int proto, timeo, retrans;
- void *err;
-
- proto = IPPROTO_TCP;
- /* Since we are following a referral and there may be alternatives,
- set the timeouts and retries to low values */
- timeo = 2;
- retrans = 1;
- nfs_init_timeout_values(&timeparms, proto, timeo, retrans);
-
- server->client = nfs4_create_client(server, &timeparms, proto, data->authflavor);
- if (IS_ERR((err = server->client)))
- goto out_err;
+ mntroot = nfs4_get_root(s, data->fh);
+ if (IS_ERR(mntroot)) {
+ error = PTR_ERR(mntroot);
+ goto error_splat_super;
+ }
- sb->s_time_gran = 1;
- sb->s_op = &nfs4_sops;
- err = ERR_PTR(nfs_sb_init(sb, data->authflavor));
- if (!IS_ERR(err))
- return server;
-out_err:
- return (struct nfs_server *)err;
-}
+ s->s_flags |= MS_ACTIVE;
+ mnt->mnt_sb = s;
+ mnt->mnt_root = mntroot;
-static int nfs_referral_nfs4_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
-{
- struct nfs_clone_mount *data = raw_data;
- return nfs_clone_generic_sb(data, nfs4_referral_sb, nfs4_referral_server, mnt);
+ dprintk("<-- nfs4_referral_get_sb() = 0\n");
+ return 0;
+
+out_err_nosb:
+ nfs_free_server(server);
+out_err_noserver:
+ dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
+ return error;
+
+error_splat_super:
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
+ return error;
}
-#endif
+#endif /* CONFIG_NFS_V4 */
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 1bb2641..6a90ccc 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -205,7 +205,7 @@ static int nfs_writepage_sync(struct nfs
struct page *page, unsigned int offset, unsigned int count,
int how)
{
- unsigned int wsize = NFS_SERVER(inode)->wsize;
+ unsigned int wsize = NFS_SCLIENT(inode)->wsize;
int result, written = 0;
struct nfs_write_data *wdata;
@@ -691,7 +691,7 @@ static struct nfs_page * nfs_update_requ
end = offset + bytes;
- if (nfs_wait_on_write_congestion(page->mapping, server->flags & NFS_MOUNT_INTR))
+ if (nfs_wait_on_write_congestion(page->mapping, server->nfs_client->flags & NFS_MOUNT_INTR))
return ERR_PTR(-ERESTARTSYS);
for (;;) {
/* Loop over all inode entries and see if we find
@@ -977,7 +977,7 @@ static int nfs_flush_multi(struct inode
struct nfs_page *req = nfs_list_entry(head->next);
struct page *page = req->wb_page;
struct nfs_write_data *data;
- unsigned int wsize = NFS_SERVER(inode)->wsize;
+ unsigned int wsize = NFS_SCLIENT(inode)->wsize;
unsigned int nbytes, offset;
int requests = 0;
LIST_HEAD(list);
@@ -1048,7 +1048,7 @@ static int nfs_flush_one(struct inode *i
struct nfs_write_data *data;
unsigned int count;
- data = nfs_writedata_alloc(NFS_SERVER(inode)->wpages);
+ data = nfs_writedata_alloc(NFS_SCLIENT(inode)->wpages);
if (!data)
goto out_bad;
@@ -1085,8 +1085,8 @@ static int nfs_flush_list(struct inode *
LIST_HEAD(one_request);
int (*flush_one)(struct inode *, struct list_head *, int);
struct nfs_page *req;
- int wpages = NFS_SERVER(inode)->wpages;
- int wsize = NFS_SERVER(inode)->wsize;
+ int wpages = NFS_SCLIENT(inode)->wpages;
+ int wsize = NFS_SCLIENT(inode)->wsize;
int error;
flush_one = nfs_flush_one;
@@ -1258,7 +1258,7 @@ #if defined(CONFIG_NFS_V3) || defined(CO
if (time_before(complain, jiffies)) {
dprintk("NFS: faulty NFS server %s:"
" (committed = %d) != (stable = %d)\n",
- NFS_SERVER(data->inode)->hostname,
+ NFS_SCLIENT(data->inode)->hostname,
resp->verf->committed, argp->stable);
complain = jiffies + 300 * HZ;
}
@@ -1356,7 +1356,7 @@ nfs_commit_list(struct inode *inode, str
struct nfs_write_data *data;
struct nfs_page *req;
- data = nfs_commit_alloc(NFS_SERVER(inode)->wpages);
+ data = nfs_commit_alloc(NFS_SCLIENT(inode)->wpages);
if (!data)
goto out_bad;
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 8f5c098..c39538e 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -208,19 +208,20 @@ #define NFS_SB(s) ((struct nfs_server *
#define NFS_FH(inode) (&NFS_I(inode)->fh)
#define NFS_SERVER(inode) (NFS_SB(inode->i_sb))
-#define NFS_CLIENT(inode) (NFS_SERVER(inode)->client)
-#define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops)
+#define NFS_SCLIENT(inode) (NFS_SERVER(inode)->nfs_client)
+#define NFS_CLIENT(inode) (NFS_SCLIENT(inode)->client)
+#define NFS_PROTO(inode) (NFS_SCLIENT(inode)->rpc_ops)
#define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode)))
#define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf)
#define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies)
#define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr)
#define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo)
#define NFS_MINATTRTIMEO(inode) \
- (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \
- : NFS_SERVER(inode)->acregmin)
+ (S_ISDIR(inode->i_mode)? NFS_SCLIENT(inode)->acdirmin \
+ : NFS_SCLIENT(inode)->acregmin)
#define NFS_MAXATTRTIMEO(inode) \
- (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \
- : NFS_SERVER(inode)->acregmax)
+ (S_ISDIR(inode->i_mode)? NFS_SCLIENT(inode)->acdirmax \
+ : NFS_SCLIENT(inode)->acregmax)
#define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp)
#define NFS_FLAGS(inode) (NFS_I(inode)->flags)
@@ -577,6 +578,7 @@ #define NFSDBG_XDR 0x0020
#define NFSDBG_FILE 0x0040
#define NFSDBG_ROOT 0x0080
#define NFSDBG_CALLBACK 0x0100
+#define NFSDBG_CLIENT 0x0200
#define NFSDBG_ALL 0xFFFF
#ifdef __KERNEL__
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 6b4a13c..f99dd66 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -7,15 +7,22 @@ #include <linux/backing-dev.h>
struct nfs_iostats;
/*
- * NFS client parameters stored in the superblock.
+ * NFS client parameters shared between superblocks
*/
-struct nfs_server {
+struct nfs_client {
+ atomic_t usage;
+ struct list_head share_link; /* list of shared clients */
+ struct list_head superblocks; /* list of nfs_server structs */
+ int state; /* current client state (-ve: init error) */
+#define NFS_CS_READY 0 /* ready to be used */
+#define NFS_CS_INITING 1 /* busy initialising */
+
struct rpc_clnt * client; /* RPC client handle */
struct rpc_clnt * client_sys; /* 2nd handle for FSINFO */
struct rpc_clnt * client_acl; /* ACL RPC client handle */
struct nfs_rpc_ops * rpc_ops; /* NFS protocol vector */
- struct nfs_iostats * io_stats; /* I/O statistics */
struct backing_dev_info backing_dev_info;
+ rpc_authflavor_t authflavour;
int flags; /* various flags */
unsigned int caps; /* server capabilities */
unsigned int rsize; /* read size */
@@ -31,22 +38,73 @@ struct nfs_server {
unsigned int acdirmax;
unsigned long retrans_timeo; /* retransmit timeout */
unsigned int retrans_count; /* number of retransmit tries */
+ int nfsversion; /* NFS protocol version */
unsigned int namelen;
char * hostname; /* remote hostname */
- struct nfs_fh fh;
- struct sockaddr_in addr;
- struct nfs_fsid fsid;
- unsigned long mount_time; /* when this fs was mounted */
+ struct sockaddr_in addr; /* Server identifier */
+
#ifdef CONFIG_NFS_V4
+ struct list_head cl_servers; /* Global list of servers */
+ u64 cl_clientid; /* constant */
+ nfs4_verifier cl_confirm;
+ unsigned long cl_state;
+
+ u32 cl_lockowner_id;
+
+ /*
+ * The following rwsem ensures exclusive access to the server
+ * while we recover the state following a lease expiration.
+ */
+ struct rw_semaphore cl_sem;
+
+ struct list_head cl_delegations;
+ struct list_head cl_state_owners;
+ struct list_head cl_unused;
+ int cl_nunused;
+ spinlock_t cl_lock;
+ atomic_t cl_count;
+
+ struct rpc_clnt * cl_rpcclient;
+
+ unsigned long cl_lease_time;
+ unsigned long cl_last_renewal;
+ struct work_struct cl_renewd;
+ struct work_struct cl_recoverd;
+
+ struct rpc_wait_queue cl_rpcwaitq;
+
+ /* used for the setclientid verifier */
+ struct timespec cl_boot_time;
+
+ /* idmapper */
+ struct idmap * cl_idmap;
+
+ unsigned char cl_id_uniquifier;
+
/* Our own IP address, as a null-terminated string.
* This is used to generate the clientid, and the callback address.
*/
char ip_addr[16];
- char * mnt_path;
- struct nfs4_client * nfs4_state; /* all NFSv4 state starts here */
- struct list_head nfs4_siblings; /* List of other nfs_server structs
- * that share the same clientid
+#endif
+};
+
+/*
+ * NFS client parameters stored in the superblock.
+ */
+struct nfs_server {
+ struct nfs_client * nfs_client; /* shared client and NFS4 state */
+ struct list_head client_link; /* List of other nfs_server structs
+ * that share the same client
*/
+ struct list_head master_link; /* link in master servers list */
+ struct nfs_iostats * io_stats; /* I/O statistics */
+ struct nfs_fsid fsid;
+ __u64 maxfilesize; /* maximum file size */
+ unsigned long mount_time; /* when this fs was mounted */
+ unsigned int caps; /* server capabilities */
+ dev_t s_dev; /* superblock dev numbers */
+
+#ifdef CONFIG_NFS_V4
u32 attr_bitmask[2];/* V4 bitmask representing the set
of attributes supported on this
filesystem */
diff --git a/include/linux/nfs_idmap.h b/include/linux/nfs_idmap.h
index 102e560..15a9f3b 100644
--- a/include/linux/nfs_idmap.h
+++ b/include/linux/nfs_idmap.h
@@ -62,15 +62,15 @@ struct idmap_msg {
#ifdef __KERNEL__
/* Forward declaration to make this header independent of others */
-struct nfs4_client;
+struct nfs_client;
-void nfs_idmap_new(struct nfs4_client *);
-void nfs_idmap_delete(struct nfs4_client *);
+int nfs_idmap_new(struct nfs_client *);
+void nfs_idmap_delete(struct nfs_client *);
-int nfs_map_name_to_uid(struct nfs4_client *, const char *, size_t, __u32 *);
-int nfs_map_group_to_gid(struct nfs4_client *, const char *, size_t, __u32 *);
-int nfs_map_uid_to_name(struct nfs4_client *, __u32, char *);
-int nfs_map_gid_to_group(struct nfs4_client *, __u32, char *);
+int nfs_map_name_to_uid(struct nfs_client *, const char *, size_t, __u32 *);
+int nfs_map_group_to_gid(struct nfs_client *, const char *, size_t, __u32 *);
+int nfs_map_uid_to_name(struct nfs_client *, __u32, char *);
+int nfs_map_gid_to_group(struct nfs_client *, __u32, char *);
extern unsigned int nfs_idmap_cache_timeout;
#endif /* __KERNEL__ */
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 7c7320f..181d07c 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -768,6 +768,9 @@ struct nfs_rpc_ops {
int (*getroot) (struct nfs_server *, struct nfs_fh *,
struct nfs_fsinfo *);
+ int (*lookupfh)(struct nfs_server *, struct nfs_fh *,
+ struct qstr *, struct nfs_fh *,
+ struct nfs_fattr *);
int (*getattr) (struct nfs_server *, struct nfs_fh *,
struct nfs_fattr *);
int (*setattr) (struct dentry *, struct nfs_fattr *,
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