[Linux-cachefs] [PATCH 05/14] NFS: Split fs/nfs/inode.c into inode, superblock and namespace bits [try #8]
David Howells
dhowells at redhat.com
Wed May 10 16:01:30 UTC 2006
This patch splits superblock and namespace related stuff out of fs/nfs/inode.c
into super.c, namespace.c and nfs4namespace.c in that directory.
fs/nfs/internal.h is also created to hold the common definitions and all the
extern references in fs/nfs/*.c have been moved into it.
Signed-Off-By: David Howells <dhowells at redhat.com>
---
fs/nfs/Makefile | 5
fs/nfs/callback.c | 5
fs/nfs/direct.c | 6
fs/nfs/idmap.c | 3
fs/nfs/inode.c | 1837 +-----------------------------------------------
fs/nfs/internal.h | 184 +++++
fs/nfs/namespace.c | 112 +++
fs/nfs/nfs2xdr.c | 3
fs/nfs/nfs3proc.c | 5
fs/nfs/nfs3xdr.c | 3
fs/nfs/nfs4namespace.c | 201 +++++
fs/nfs/nfs4proc.c | 2
fs/nfs/pagelist.c | 4
fs/nfs/proc.c | 5
fs/nfs/read.c | 4
fs/nfs/super.c | 1510 +++++++++++++++++++++++++++++++++++++++
fs/nfs/write.c | 4
include/linux/nfs_fs.h | 2
18 files changed, 2046 insertions(+), 1849 deletions(-)
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index d9d494c..0b572a0 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -4,7 +4,7 @@ #
obj-$(CONFIG_NFS_FS) += nfs.o
-nfs-y := dir.o file.o inode.o nfs2xdr.o pagelist.o \
+nfs-y := dir.o file.o inode.o super.o nfs2xdr.o pagelist.o \
proc.o read.o symlink.o unlink.o write.o \
namespace.o
nfs-$(CONFIG_ROOT_NFS) += nfsroot.o mount_clnt.o
@@ -12,7 +12,8 @@ nfs-$(CONFIG_NFS_V3) += nfs3proc.o nfs3x
nfs-$(CONFIG_NFS_V3_ACL) += nfs3acl.o
nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \
delegation.o idmap.o \
- callback.o callback_xdr.o callback_proc.o
+ callback.o callback_xdr.o callback_proc.o \
+ nfs4namespace.o
nfs-$(CONFIG_NFS_DIRECTIO) += direct.o
nfs-$(CONFIG_SYSCTL) += sysctl.o
nfs-objs := $(nfs-y)
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 90c95ad..9817065 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -35,9 +35,6 @@ static struct nfs_callback_data nfs_call
static DEFINE_MUTEX(nfs_callback_mutex);
static struct svc_program nfs4_callback_program;
-unsigned int nfs_callback_set_tcpport;
-unsigned short nfs_callback_tcpport;
-
/*
* This is the callback kernel thread.
*/
@@ -182,8 +179,6 @@ static int nfs_callback_authenticate(str
/*
* Define NFS4 callback program
*/
-extern struct svc_version nfs4_callback_version1;
-
static struct svc_version *nfs4_callback_version[] = {
[1] = &nfs4_callback_version1,
};
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 3c72b0c..402005c 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -892,7 +892,7 @@ out:
* nfs_init_directcache - create a slab cache for nfs_direct_req structures
*
*/
-int nfs_init_directcache(void)
+int __init nfs_init_directcache(void)
{
nfs_direct_cachep = kmem_cache_create("nfs_direct_cache",
sizeof(struct nfs_direct_req),
@@ -906,10 +906,10 @@ int nfs_init_directcache(void)
}
/**
- * nfs_init_directcache - destroy the slab cache for nfs_direct_req structures
+ * nfs_destroy_directcache - destroy the slab cache for nfs_direct_req structures
*
*/
-void nfs_destroy_directcache(void)
+void __exit nfs_destroy_directcache(void)
{
if (kmem_cache_destroy(nfs_direct_cachep))
printk(KERN_INFO "nfs_direct_cache: not all structures were freed\n");
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index b81e7ed..dd461e6 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -54,9 +54,6 @@ #include "nfs4_fs.h"
#define IDMAP_HASH_SZ 128
-/* Default cache timeout is 10 minutes */
-unsigned int nfs_idmap_cache_timeout = 600 * HZ;
-
struct idmap_hashent {
unsigned long ih_expires;
__u32 ih_id;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 5fe41e0..6dd6ed7 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -46,89 +46,17 @@ #include "nfs4_fs.h"
#include "callback.h"
#include "delegation.h"
#include "iostat.h"
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_VFS
#define NFS_PARANOIA 1
-/* 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)
-
static void nfs_invalidate_inode(struct inode *);
static int nfs_update_inode(struct inode *, struct nfs_fattr *);
-static struct inode *nfs_alloc_inode(struct super_block *sb);
-static void nfs_destroy_inode(struct inode *);
-static int nfs_write_inode(struct inode *,int);
-static void nfs_delete_inode(struct inode *);
-static void nfs_clear_inode(struct inode *);
-static void nfs_umount_begin(struct vfsmount *, int);
-static int nfs_statfs(struct vfsmount *, struct kstatfs *);
-static int nfs_show_options(struct seq_file *, struct vfsmount *);
-static int nfs_show_stats(struct seq_file *, struct vfsmount *);
static void nfs_zap_acl_cache(struct inode *);
-static struct rpc_program nfs_program;
-
-static struct super_operations nfs_sops = {
- .alloc_inode = nfs_alloc_inode,
- .destroy_inode = nfs_destroy_inode,
- .write_inode = nfs_write_inode,
- .delete_inode = nfs_delete_inode,
- .statfs = nfs_statfs,
- .clear_inode = nfs_clear_inode,
- .umount_begin = nfs_umount_begin,
- .show_options = nfs_show_options,
- .show_stats = nfs_show_stats,
-};
-
-/*
- * RPC cruft for NFS
- */
-static struct rpc_stat nfs_rpcstat = {
- .program = &nfs_program
-};
-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",
-};
-
-#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 kmem_cache_t * nfs_inode_cachep;
static inline unsigned long
nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
@@ -136,8 +64,7 @@ nfs_fattr_to_ino_t(struct nfs_fattr *fat
return nfs_fileid_to_ino_t(fattr->fileid);
}
-static int
-nfs_write_inode(struct inode *inode, int sync)
+int nfs_write_inode(struct inode *inode, int sync)
{
int flags = sync ? FLUSH_SYNC : 0;
int ret;
@@ -148,8 +75,7 @@ nfs_write_inode(struct inode *inode, int
return 0;
}
-static void
-nfs_delete_inode(struct inode * inode)
+void nfs_delete_inode(struct inode * inode)
{
dprintk("NFS: delete_inode(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino);
@@ -166,8 +92,7 @@ nfs_delete_inode(struct inode * inode)
clear_inode(inode);
}
-static void
-nfs_clear_inode(struct inode *inode)
+void nfs_clear_inode(struct inode *inode)
{
struct nfs_inode *nfsi = NFS_I(inode);
struct rpc_cred *cred;
@@ -181,567 +106,6 @@ nfs_clear_inode(struct inode *inode)
BUG_ON(atomic_read(&nfsi->data_updates) != 0);
}
-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);
-}
-
-
-static inline unsigned long
-nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
-{
- /* make sure blocksize is a power of two */
- if ((bsize & (bsize - 1)) || nrbitsp) {
- unsigned char nrbits;
-
- for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
- ;
- bsize = 1 << nrbits;
- if (nrbitsp)
- *nrbitsp = nrbits;
- }
-
- return bsize;
-}
-
-/*
- * Calculate the number of 512byte blocks used.
- */
-static inline unsigned long
-nfs_calc_block_size(u64 tsize)
-{
- loff_t used = (tsize + 511) >> 9;
- return (used > ULONG_MAX) ? ULONG_MAX : used;
-}
-
-/*
- * Compute and set NFS server blocksize
- */
-static inline unsigned long
-nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
-{
- if (bsize < NFS_MIN_FILE_IO_SIZE)
- bsize = NFS_DEF_FILE_IO_SIZE;
- else if (bsize >= NFS_MAX_FILE_IO_SIZE)
- bsize = NFS_MAX_FILE_IO_SIZE;
-
- return nfs_block_bits(bsize, nrbitsp);
-}
-
-static inline void
-nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
-{
- sb->s_maxbytes = (loff_t)maxfilesize;
- if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
- sb->s_maxbytes = MAX_LFS_FILESIZE;
-}
-
-/*
- * Obtain the root inode of the file system.
- */
-static struct inode *
-nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
-{
- 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);
- }
-
- 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;
-
- 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;
- }
- sb->s_root = d_alloc_root(root_inode);
- if (!sb->s_root) {
- no_root_error = -ENOMEM;
- goto out_no_root;
- }
- 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;
-
- 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;
- }
- server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
-
- nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
-
- server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
- server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
-
- /* 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;
-}
-
-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_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;
- }
-
- clnt->cl_intr = 1;
- clnt->cl_softrtry = 1;
-
- return clnt;
-
-out_fail:
- return clnt;
-}
-
-/*
- * 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.
- */
-static int
-nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
-{
- struct nfs_server *server;
- rpc_authflavor_t authflavor;
-
- 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
-
- /* 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.
- */
- 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);
-}
-
-static int
-nfs_statfs(struct vfsmount *mnt, struct kstatfs *buf)
-{
- struct super_block *sb = mnt->mnt_sb;
- struct nfs_server *server = NFS_SB(sb);
- unsigned char blockbits;
- unsigned long blockres;
- struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
- struct nfs_fattr fattr;
- struct nfs_fsstat res = {
- .fattr = &fattr,
- };
- int error;
-
- lock_kernel();
-
- error = server->rpc_ops->statfs(server, rootfh, &res);
- buf->f_type = NFS_SUPER_MAGIC;
- if (error < 0)
- goto out_err;
-
- /*
- * Current versions of glibc do not correctly handle the
- * case where f_frsize != f_bsize. Eventually we want to
- * report the value of wtmult in this field.
- */
- buf->f_frsize = sb->s_blocksize;
-
- /*
- * On most *nix systems, f_blocks, f_bfree, and f_bavail
- * are reported in units of f_frsize. Linux hasn't had
- * an f_frsize field in its statfs struct until recently,
- * thus historically Linux's sys_statfs reports these
- * fields in units of f_bsize.
- */
- buf->f_bsize = sb->s_blocksize;
- blockbits = sb->s_blocksize_bits;
- blockres = (1 << blockbits) - 1;
- buf->f_blocks = (res.tbytes + blockres) >> blockbits;
- buf->f_bfree = (res.fbytes + blockres) >> blockbits;
- buf->f_bavail = (res.abytes + blockres) >> blockbits;
-
- buf->f_files = res.tfiles;
- buf->f_ffree = res.afiles;
-
- buf->f_namelen = server->namelen;
- out:
- unlock_kernel();
- return 0;
-
- out_err:
- dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
- buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
- goto out;
-
-}
-
-static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
-{
- static struct proc_nfs_info {
- int flag;
- char *str;
- char *nostr;
- } nfs_info[] = {
- { NFS_MOUNT_SOFT, ",soft", ",hard" },
- { NFS_MOUNT_INTR, ",intr", "" },
- { NFS_MOUNT_NOCTO, ",nocto", "" },
- { NFS_MOUNT_NOAC, ",noac", "" },
- { NFS_MOUNT_NONLM, ",nolock", "" },
- { NFS_MOUNT_NOACL, ",noacl", "" },
- { 0, NULL, NULL }
- };
- struct proc_nfs_info *nfs_infop;
- 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);
- for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
- if (nfss->flags & nfs_infop->flag)
- seq_puts(m, nfs_infop->str);
- else
- seq_puts(m, nfs_infop->nostr);
- }
- switch (nfss->client->cl_xprt->prot) {
- case IPPROTO_TCP:
- proto = "tcp";
- break;
- case IPPROTO_UDP:
- proto = "udp";
- break;
- default:
- snprintf(buf, sizeof(buf), "%u", nfss->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);
-}
-
-static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
-{
- struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
-
- nfs_show_mount_options(m, nfss, 0);
-
- seq_puts(m, ",addr=");
- seq_escape(m, nfss->hostname, " \t\n\\");
-
- return 0;
-}
-
-static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
-{
- int i, cpu;
- struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
- struct rpc_auth *auth = nfss->client->cl_auth;
- struct nfs_iostats totals = { };
-
- seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
-
- /*
- * Display all mount option settings
- */
- seq_printf(m, "\n\topts:\t");
- seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
- seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
- seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
- seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
- nfs_show_mount_options(m, nfss, 1);
-
- seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
-
- 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);
-
-#ifdef CONFIG_NFS_V4
- if (nfss->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]);
- seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
- }
-#endif
-
- /*
- * Display security flavor in effect for this mount
- */
- seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
- if (auth->au_flavor)
- seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
-
- /*
- * Display superblock I/O counters
- */
- for_each_possible_cpu(cpu) {
- struct nfs_iostats *stats;
-
- preempt_disable();
- stats = per_cpu_ptr(nfss->io_stats, cpu);
-
- for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
- totals.events[i] += stats->events[i];
- for (i = 0; i < __NFSIOS_BYTESMAX; i++)
- totals.bytes[i] += stats->bytes[i];
-
- preempt_enable();
- }
-
- seq_printf(m, "\n\tevents:\t");
- for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
- seq_printf(m, "%lu ", totals.events[i]);
- seq_printf(m, "\n\tbytes:\t");
- for (i = 0; i < __NFSIOS_BYTESMAX; i++)
- seq_printf(m, "%Lu ", totals.bytes[i]);
- seq_printf(m, "\n");
-
- rpc_print_iostats(m, nfss->client);
-
- return 0;
-}
-
/**
* nfs_sync_mapping - helper to flush all mmapped dirty data to disk
*/
@@ -1682,396 +1046,15 @@ #endif
goto out_err;
}
-/*
- * File system information
- */
-
-/*
- * nfs_path - reconstruct the path given an arbitrary dentry
- * @base - arbitrary string to prepend to the path
- * @dentry - pointer to dentry
- * @buffer - result buffer
- * @buflen - length of buffer
- *
- * Helper function for constructing the path from the
- * root dentry to an arbitrary hashed dentry.
- *
- * This is mainly for use in figuring out the path on the
- * server side when automounting on top of an existing partition.
- */
-static char *nfs_path(const char *base, const struct dentry *dentry,
- char *buffer, ssize_t buflen)
-{
- char *end = buffer+buflen;
- int namelen;
-
- *--end = '\0';
- buflen--;
- spin_lock(&dcache_lock);
- while (!IS_ROOT(dentry)) {
- namelen = dentry->d_name.len;
- buflen -= namelen + 1;
- if (buflen < 0)
- goto Elong;
- end -= namelen;
- memcpy(end, dentry->d_name.name, namelen);
- *--end = '/';
- dentry = dentry->d_parent;
- }
- spin_unlock(&dcache_lock);
- namelen = strlen(base);
- /* Strip off excess slashes in base string */
- while (namelen > 0 && base[namelen - 1] == '/')
- namelen--;
- buflen -= namelen;
- if (buflen < 0)
- goto Elong;
- end -= namelen;
- memcpy(end, base, namelen);
- return end;
-Elong:
- return ERR_PTR(-ENAMETOOLONG);
-}
-
-struct nfs_clone_mount {
- const struct super_block *sb;
- const struct dentry *dentry;
- struct nfs_fh *fh;
- struct nfs_fattr *fattr;
- char *hostname;
- char *mnt_path;
- struct sockaddr_in *addr;
- rpc_authflavor_t authflavor;
-};
-
-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;
- }
-
- if (sb->s_root) {
- rpciod_down();
- kfree(server->hostname);
- kfree(server);
- return simple_set_mnt(mnt, sb);
- }
-
- 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;
-}
-
-static int nfs_set_super(struct super_block *s, void *data)
-{
- s->s_fs_info = data;
- return set_anon_super(s, data);
-}
-
-static int nfs_compare_super(struct super_block *sb, void *data)
-{
- struct nfs_server *server = data;
- struct nfs_server *old = NFS_SB(sb);
-
- if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
- return 0;
- if (old->addr.sin_port != server->addr.sin_port)
- return 0;
- return !nfs_compare_fh(&old->fh, &server->fh);
-}
-
-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_mount_data *data = raw_data;
-
- 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 */
-
- error = -ENOMEM;
- server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
- if (!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;
- }
-
- s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
- if (IS_ERR(s)) {
- error = PTR_ERR(s);
- goto out_err_rpciod;
- }
-
- if (s->s_root)
- goto out_rpciod_down;
-
- s->s_flags = flags;
-
- error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
- if (error) {
- up_write(&s->s_umount);
- deactivate_super(s);
- return error;
- }
- s->s_flags |= MS_ACTIVE;
- return simple_set_mnt(mnt, s);
-
-out_rpciod_down:
- rpciod_down();
- kfree(server);
- return simple_set_mnt(mnt, s);
-
-out_err_rpciod:
- rpciod_down();
-out_err:
- kfree(server);
-out_err_noserver:
- return error;
-}
-
-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 file_system_type nfs_fs_type = {
- .owner = THIS_MODULE,
- .name = "nfs",
- .get_sb = nfs_get_sb,
- .kill_sb = nfs_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
-};
-
-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;
-}
-
-static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *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;
-}
-
-static int nfs_clone_nfs_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);
-}
-
-static struct file_system_type clone_nfs_fs_type = {
- .owner = THIS_MODULE,
- .name = "nfs",
- .get_sb = nfs_clone_nfs_sb,
- .kill_sb = nfs_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
-};
#ifdef CONFIG_NFS_V4
-static void nfs4_clear_inode(struct inode *);
-
-
-static struct super_operations nfs4_sops = {
- .alloc_inode = nfs_alloc_inode,
- .destroy_inode = nfs_destroy_inode,
- .write_inode = nfs_write_inode,
- .delete_inode = nfs_delete_inode,
- .statfs = nfs_statfs,
- .clear_inode = nfs4_clear_inode,
- .umount_begin = nfs_umount_begin,
- .show_options = nfs_show_options,
- .show_stats = nfs_show_stats,
-};
-
/*
* Clean out any remaining NFSv4 state that might be left over due
* to open() calls that passed nfs_atomic_lookup, but failed to call
* nfs_open().
*/
-static void nfs4_clear_inode(struct inode *inode)
+void nfs4_clear_inode(struct inode *inode)
{
struct nfs_inode *nfsi = NFS_I(inode);
@@ -2095,783 +1078,9 @@ static void nfs4_clear_inode(struct inod
nfs4_close_state(state, state->state);
}
}
-
-
-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);
- }
-
- /* 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;
- }
-
- if (server->nfs4_state->cl_idmap == NULL) {
- dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
- return ERR_PTR(-ENOMEM);
- }
-
- 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;
- }
- }
- return clnt;
-
- out_fail:
- if (clp)
- nfs4_put_client(clp);
- return ERR_PTR(err);
-}
-
-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;
-
- server->acregmin = data->acregmin*HZ;
- server->acregmax = data->acregmax*HZ;
- server->acdirmin = data->acdirmin*HZ;
- server->acdirmax = data->acdirmax*HZ;
-
- server->rpc_ops = &nfs_v4_clientops;
-
- nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
-
- server->retrans_timeo = timeparms.to_initval;
- server->retrans_count = timeparms.to_retries;
-
- /* 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;
- }
- }
-
- 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;
- }
-
- sb->s_time_gran = 1;
-
- sb->s_op = &nfs4_sops;
- err = nfs_sb_init(sb, authflavour);
-
- out_fail:
- return err;
-}
-
-static int nfs4_compare_super(struct super_block *sb, void *data)
-{
- 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;
-}
-
-static void *
-nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
-{
- void *p = NULL;
-
- if (!src->len)
- return ERR_PTR(-EINVAL);
- if (src->len < maxlen)
- maxlen = src->len;
- if (dst == NULL) {
- p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
- if (p == NULL)
- return ERR_PTR(-ENOMEM);
- }
- if (copy_from_user(dst, src->data, maxlen)) {
- kfree(p);
- return ERR_PTR(-EFAULT);
- }
- dst[maxlen] = '\0';
- return dst;
-}
-
-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;
- void *p;
-
- if (data == NULL) {
- dprintk("%s: missing data argument\n", __FUNCTION__);
- return -EINVAL;
- }
- if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
- dprintk("%s: bad mount version\n", __FUNCTION__);
- 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);
-
- p = nfs_copy_user_string(NULL, &data->hostname, 256);
- if (IS_ERR(p))
- goto out_err;
- server->hostname = p;
-
- p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
- if (IS_ERR(p))
- goto out_err;
- server->mnt_path = p;
-
- p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
- sizeof(server->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;
- }
-
- s = sget(fs_type, nfs4_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);
- }
-
- s->s_flags = flags;
-
- error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
- if (error) {
- up_write(&s->s_umount);
- deactivate_super(s);
- return error;
- }
- s->s_flags |= MS_ACTIVE;
- return simple_set_mnt(mnt, s);
-out_err:
- error = PTR_ERR(p);
-out_free:
- kfree(server->mnt_path);
- kfree(server->hostname);
- kfree(server);
- return error;
-}
-
-static void nfs4_kill_super(struct super_block *sb)
-{
- struct nfs_server *server = NFS_SB(sb);
-
- nfs_return_all_delegations(sb);
- kill_anon_super(sb);
-
- nfs4_renewd_prepare_shutdown(server);
-
- if (server->client != NULL && !IS_ERR(server->client))
- rpc_shutdown_client(server->client);
-
- destroy_nfsv4_state(server);
-
- rpciod_down();
-
- nfs_free_iostats(server->io_stats);
- kfree(server->hostname);
- kfree(server);
- nfs_release_automount_timer();
-}
-
-static struct file_system_type nfs4_fs_type = {
- .owner = THIS_MODULE,
- .name = "nfs4",
- .get_sb = nfs4_get_sb,
- .kill_sb = nfs4_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
-};
-
-static const int nfs_set_port_min = 0;
-static const int nfs_set_port_max = 65535;
-static int param_set_port(const char *val, struct kernel_param *kp)
-{
- char *endp;
- int num = simple_strtol(val, &endp, 0);
- if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
- return -EINVAL;
- *((int *)kp->arg) = num;
- return 0;
-}
-
-module_param_call(callback_tcpport, param_set_port, param_get_int,
- &nfs_callback_set_tcpport, 0644);
-
-static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
-{
- char *endp;
- int num = simple_strtol(val, &endp, 0);
- int jif = num * HZ;
- if (endp == val || *endp || num < 0 || jif < num)
- return -EINVAL;
- *((int *)kp->arg) = jif;
- return 0;
-}
-
-module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
- &nfs_idmap_cache_timeout, 0644);
-
-/* Constructs the SERVER-side path */
-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);
-}
-
-static inline char *nfs4_dup_path(const struct dentry *dentry)
-{
- char *page = (char *) __get_free_page(GFP_USER);
- char *path;
-
- path = nfs4_path(dentry, page, PAGE_SIZE);
- if (!IS_ERR(path)) {
- int len = PAGE_SIZE + page - path;
- char *tmp = path;
-
- path = kmalloc(len, GFP_KERNEL);
- if (path)
- memcpy(path, tmp, len);
- else
- path = ERR_PTR(-ENOMEM);
- }
- 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;
- }
- 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);
-}
-
-static struct file_system_type clone_nfs4_fs_type = {
- .owner = THIS_MODULE,
- .name = "nfs4",
- .get_sb = nfs_clone_nfs4_sb,
- .kill_sb = nfs4_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
-};
-
-static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname, struct nfs_clone_mount *mountdata)
-{
- struct vfsmount *mnt = NULL;
- switch (server->rpc_ops->version) {
- case 2:
- case 3:
- mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
- break;
- case 4:
- mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, mountdata);
- }
- return mnt;
-}
-
-#define nfs4_init_once(nfsi) \
- do { \
- INIT_LIST_HEAD(&(nfsi)->open_states); \
- nfsi->delegation = NULL; \
- nfsi->delegation_state = 0; \
- init_rwsem(&nfsi->rwsem); \
- } while(0)
-
-static inline int register_nfs4fs(void)
-{
- int ret;
-
- ret = nfs_register_sysctl();
- if (ret != 0)
- return ret;
- ret = register_filesystem(&nfs4_fs_type);
- if (ret != 0)
- nfs_unregister_sysctl();
- return ret;
-}
-
-static inline void unregister_nfs4fs(void)
-{
- unregister_filesystem(&nfs4_fs_type);
- nfs_unregister_sysctl();
-}
-#else
-#define nfs4_fill_sb(a,b) ERR_PTR(-EINVAL)
-#define nfs4_fill_super(a,b) ERR_PTR(-EINVAL)
-#define nfs4_init_once(nfsi) \
- do { } while (0)
-#define register_nfs4fs() (0)
-#define unregister_nfs4fs()
-static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname, struct nfs_clone_mount *mountdata)
-{
- return vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
-}
-#endif
-
-static inline char *nfs_devname(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
- char *buffer, ssize_t buflen)
-{
- return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen);
-}
-
-/**
- * nfs_do_submount - set up mountpoint when crossing a filesystem boundary
- * @mnt_parent - mountpoint of parent directory
- * @dentry - parent directory
- * @fh - filehandle for new root dentry
- * @fattr - attributes for new root inode
- *
- */
-struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
- const struct dentry *dentry, struct nfs_fh *fh,
- struct nfs_fattr *fattr)
-{
- struct nfs_clone_mount mountdata = {
- .sb = mnt_parent->mnt_sb,
- .dentry = dentry,
- .fh = fh,
- .fattr = fattr,
- };
- struct vfsmount *mnt = ERR_PTR(-ENOMEM);
- char *page = (char *) __get_free_page(GFP_USER);
- char *devname;
-
- dprintk("%s: submounting on %s/%s\n", __FUNCTION__,
- dentry->d_parent->d_name.name,
- dentry->d_name.name);
- if (page == NULL)
- goto out;
- devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
- mnt = (struct vfsmount *)devname;
- if (IS_ERR(devname))
- goto free_page;
- mnt = nfs_do_clone_mount(NFS_SB(mnt_parent->mnt_sb), devname, &mountdata);
-free_page:
- free_page((unsigned long)page);
-out:
- dprintk("%s: done\n", __FUNCTION__);
- return mnt;
-}
-
-#ifdef CONFIG_NFS_V4
-/* Check if fs_root is valid */
-static inline char *nfs4_pathname_string(struct nfs4_pathname *pathname, char *buffer, ssize_t buflen)
-{
- char *end = buffer + buflen;
- int n;
-
- *--end = '\0';
- buflen--;
-
- n = pathname->ncomponents;
- while (--n >= 0) {
- struct nfs4_string *component = &pathname->components[n];
- buflen -= component->len + 1;
- if (buflen < 0)
- goto Elong;
- end -= component->len;
- memcpy(end, component->data, component->len);
- *--end = '/';
- }
- return end;
-Elong:
- return ERR_PTR(-ENAMETOOLONG);
-}
-
-/* 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;
-}
-
-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;
-}
-
-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;
-
- 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;
-}
-
-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);
-}
-
-static struct file_system_type nfs_referral_nfs4_fs_type = {
- .owner = THIS_MODULE,
- .name = "nfs4",
- .get_sb = nfs_referral_nfs4_sb,
- .kill_sb = nfs4_kill_super,
- .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
-};
-
-/**
- * nfs_follow_referral - set up mountpoint when hitting a referral on moved error
- * @mnt_parent - mountpoint of parent directory
- * @dentry - parent directory
- * @fspath - fs path returned in fs_locations
- * @mntpath - mount path to new server
- * @hostname - hostname of new server
- * @addr - host addr of new server
- *
- */
-static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
- const struct dentry *dentry,
- 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,
- };
- char *page, *page2;
- char *path, *fs_path;
- char *devname;
- int loc, s;
-
- if (locations == NULL || locations->nlocations <= 0)
- goto out;
-
- 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)
- goto out;
- page2 = (char *) __get_free_page(GFP_USER);
- if (page2 == NULL)
- 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;
- }
-
- devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
- if (IS_ERR(devname)) {
- mnt = (struct vfsmount *)devname;
- goto out_free;
- }
-
- loc = 0;
- while (loc < locations->nlocations && IS_ERR(mnt)) {
- struct nfs4_fs_location *location = &locations->locations[loc];
- char *mnt_path;
-
- if (location == NULL || location->nservers <= 0 ||
- location->rootpath.ncomponents == 0) {
- loc++;
- continue;
- }
-
- mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE);
- if (IS_ERR(mnt_path)) {
- loc++;
- continue;
- }
- mountdata.mnt_path = mnt_path;
-
- s = 0;
- while (s < location->nservers) {
- struct sockaddr_in addr = {};
-
- if (location->servers[s].len <= 0 ||
- valid_ipaddr4(location->servers[s].data) < 0) {
- s++;
- continue;
- }
-
- mountdata.hostname = location->servers[s].data;
- addr.sin_addr.s_addr = in_aton(mountdata.hostname);
- addr.sin_family = AF_INET;
- addr.sin_port = htons(NFS_PORT);
- mountdata.addr = &addr;
-
- mnt = vfs_kern_mount(&nfs_referral_nfs4_fs_type, 0, devname, &mountdata);
- if (!IS_ERR(mnt)) {
- break;
- }
- s++;
- }
- loc++;
- }
-
-out_free:
- free_page((unsigned long)page);
- free_page((unsigned long)page2);
-out:
- dprintk("%s: done\n", __FUNCTION__);
- return mnt;
-}
-
-/*
- * nfs_do_refmount - handle crossing a referral on server
- * @dentry - dentry of referral
- * @nd - nameidata info
- *
- */
-struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
-{
- struct vfsmount *mnt = ERR_PTR(-ENOENT);
- struct dentry *parent;
- struct nfs4_fs_locations *fs_locations = NULL;
- struct page *page;
- int err;
-
- /* BUG_ON(IS_ROOT(dentry)); */
- dprintk("%s: enter\n", __FUNCTION__);
-
- page = alloc_page(GFP_KERNEL);
- if (page == NULL)
- goto out;
-
- fs_locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
- if (fs_locations == NULL)
- goto out_free;
-
- /* Get locations */
- parent = dget_parent(dentry);
- 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 ||
- fs_locations->fs_path.ncomponents <= 0)
- goto out_free;
-
- mnt = nfs_follow_referral(mnt_parent, dentry, fs_locations);
-out_free:
- __free_page(page);
- kfree(fs_locations);
-out:
- dprintk("%s: done\n", __FUNCTION__);
- return mnt;
-}
-#else
-struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
-{
- return ERR_PTR(-ENOENT);
-}
-#endif
-
-extern int nfs_init_nfspagecache(void);
-extern void nfs_destroy_nfspagecache(void);
-extern int nfs_init_readpagecache(void);
-extern void nfs_destroy_readpagecache(void);
-extern int nfs_init_writepagecache(void);
-extern void nfs_destroy_writepagecache(void);
-#ifdef CONFIG_NFS_DIRECTIO
-extern int nfs_init_directcache(void);
-extern void nfs_destroy_directcache(void);
#endif
-static kmem_cache_t * nfs_inode_cachep;
-
-static struct inode *nfs_alloc_inode(struct super_block *sb)
+struct inode *nfs_alloc_inode(struct super_block *sb)
{
struct nfs_inode *nfsi;
nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL);
@@ -2890,11 +1099,23 @@ #endif /* CONFIG_NFS_V4 */
return &nfsi->vfs_inode;
}
-static void nfs_destroy_inode(struct inode *inode)
+void nfs_destroy_inode(struct inode *inode)
{
kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
}
+#ifdef CONFIG_NFS_V4
+#define nfs4_init_once(nfsi) \
+ do { \
+ INIT_LIST_HEAD(&(nfsi)->open_states); \
+ nfsi->delegation = NULL; \
+ nfsi->delegation_state = 0; \
+ init_rwsem(&nfsi->rwsem); \
+ } while(0)
+#else
+#define nfs4_init_once(nfsi) do {} while(0)
+#endif
+
static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
{
struct nfs_inode *nfsi = (struct nfs_inode *) foo;
@@ -2915,7 +1136,7 @@ static void init_once(void * foo, kmem_c
}
}
-static int nfs_init_inodecache(void)
+static int __init nfs_init_inodecache(void)
{
nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
sizeof(struct nfs_inode),
@@ -2928,7 +1149,7 @@ static int nfs_init_inodecache(void)
return 0;
}
-static void nfs_destroy_inodecache(void)
+static void __exit nfs_destroy_inodecache(void)
{
if (kmem_cache_destroy(nfs_inode_cachep))
printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n");
@@ -2957,29 +1178,22 @@ static int __init init_nfs_fs(void)
if (err)
goto out1;
-#ifdef CONFIG_NFS_DIRECTIO
err = nfs_init_directcache();
if (err)
goto out0;
-#endif
#ifdef CONFIG_PROC_FS
rpc_proc_register(&nfs_rpcstat);
#endif
- err = register_filesystem(&nfs_fs_type);
- if (err)
- goto out;
- if ((err = register_nfs4fs()) != 0)
+ if ((err = register_nfs_fs()) != 0)
goto out;
return 0;
out:
#ifdef CONFIG_PROC_FS
rpc_proc_unregister("nfs");
#endif
-#ifdef CONFIG_NFS_DIRECTIO
nfs_destroy_directcache();
out0:
-#endif
nfs_destroy_writepagecache();
out1:
nfs_destroy_readpagecache();
@@ -2993,9 +1207,7 @@ out4:
static void __exit exit_nfs_fs(void)
{
-#ifdef CONFIG_NFS_DIRECTIO
nfs_destroy_directcache();
-#endif
nfs_destroy_writepagecache();
nfs_destroy_readpagecache();
nfs_destroy_inodecache();
@@ -3003,8 +1215,7 @@ #endif
#ifdef CONFIG_PROC_FS
rpc_proc_unregister("nfs");
#endif
- unregister_filesystem(&nfs_fs_type);
- unregister_nfs4fs();
+ unregister_nfs_fs();
}
/* Not quite true; I just maintain it */
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
new file mode 100644
index 0000000..f588ea3
--- /dev/null
+++ b/fs/nfs/internal.h
@@ -0,0 +1,184 @@
+/*
+ * NFS internal definitions
+ */
+
+#include <linux/mount.h>
+
+struct nfs_clone_mount {
+ const struct super_block *sb;
+ const struct dentry *dentry;
+ struct nfs_fh *fh;
+ struct nfs_fattr *fattr;
+ char *hostname;
+ char *mnt_path;
+ struct sockaddr_in *addr;
+ rpc_authflavor_t authflavor;
+};
+
+/* nfs4namespace.c */
+#ifdef CONFIG_NFS_V4
+extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
+#else
+static inline
+struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
+{
+ return ERR_PTR(-ENOENT);
+}
+#endif
+
+/* callback_xdr.c */
+extern struct svc_version nfs4_callback_version1;
+
+/* pagelist.c */
+extern int __init nfs_init_nfspagecache(void);
+extern void __exit nfs_destroy_nfspagecache(void);
+extern int __init nfs_init_readpagecache(void);
+extern void __exit nfs_destroy_readpagecache(void);
+extern int __init nfs_init_writepagecache(void);
+extern void __exit nfs_destroy_writepagecache(void);
+
+#ifdef CONFIG_NFS_DIRECTIO
+extern int __init nfs_init_directcache(void);
+extern void __exit nfs_destroy_directcache(void);
+#else
+#define nfs_init_directcache() (0)
+#define nfs_destroy_directcache() do {} while(0)
+#endif
+
+/* nfs2xdr.c */
+extern struct rpc_procinfo nfs_procedures[];
+extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, 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);
+extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
+
+/* nfs4proc.c */
+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);
+#endif
+
+/* inode.c */
+extern struct inode *nfs_alloc_inode(struct super_block *sb);
+extern void nfs_destroy_inode(struct inode *);
+extern int nfs_write_inode(struct inode *,int);
+extern void nfs_delete_inode(struct inode *);
+extern void nfs_clear_inode(struct inode *);
+#ifdef CONFIG_NFS_V4
+extern void nfs4_clear_inode(struct inode *);
+#endif
+
+/* super.c */
+extern struct file_system_type nfs_referral_nfs4_fs_type;
+extern struct file_system_type clone_nfs_fs_type;
+#ifdef CONFIG_NFS_V4
+extern struct file_system_type clone_nfs4_fs_type;
+#endif
+#ifdef CONFIG_PROC_FS
+extern struct rpc_stat nfs_rpcstat;
+#endif
+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,
+ char *buffer, ssize_t buflen);
+
+/*
+ * Determine the mount path as a string
+ */
+#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);
+}
+#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)
+{
+ return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen);
+}
+
+/*
+ * Determine the actual block size (and log2 thereof)
+ */
+static inline
+unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
+{
+ /* make sure blocksize is a power of two */
+ if ((bsize & (bsize - 1)) || nrbitsp) {
+ unsigned char nrbits;
+
+ for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
+ ;
+ bsize = 1 << nrbits;
+ if (nrbitsp)
+ *nrbitsp = nrbits;
+ }
+
+ return bsize;
+}
+
+/*
+ * Calculate the number of 512byte blocks used.
+ */
+static inline unsigned long nfs_calc_block_size(u64 tsize)
+{
+ loff_t used = (tsize + 511) >> 9;
+ return (used > ULONG_MAX) ? ULONG_MAX : used;
+}
+
+/*
+ * Compute and set NFS server blocksize
+ */
+static inline
+unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
+{
+ if (bsize < NFS_MIN_FILE_IO_SIZE)
+ bsize = NFS_DEF_FILE_IO_SIZE;
+ else if (bsize >= NFS_MAX_FILE_IO_SIZE)
+ bsize = NFS_MAX_FILE_IO_SIZE;
+
+ return nfs_block_bits(bsize, nrbitsp);
+}
+
+/*
+ * Determine the maximum file size for a superblock
+ */
+static inline
+void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
+{
+ sb->s_maxbytes = (loff_t)maxfilesize;
+ 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 8ca44b7..19b98ca 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -15,15 +15,64 @@ #include <linux/nfs_fs.h>
#include <linux/string.h>
#include <linux/sunrpc/clnt.h>
#include <linux/vfs.h>
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_VFS
-LIST_HEAD(nfs_automount_list);
static void nfs_expire_automounts(void *list);
+
+LIST_HEAD(nfs_automount_list);
static DECLARE_WORK(nfs_automount_task, nfs_expire_automounts, &nfs_automount_list);
int nfs_mountpoint_expiry_timeout = 500 * HZ;
/*
+ * nfs_path - reconstruct the path given an arbitrary dentry
+ * @base - arbitrary string to prepend to the path
+ * @dentry - pointer to dentry
+ * @buffer - result buffer
+ * @buflen - length of buffer
+ *
+ * Helper function for constructing the path from the
+ * root dentry to an arbitrary hashed dentry.
+ *
+ * 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 *buffer, ssize_t buflen)
+{
+ char *end = buffer+buflen;
+ int namelen;
+
+ *--end = '\0';
+ buflen--;
+ spin_lock(&dcache_lock);
+ while (!IS_ROOT(dentry)) {
+ namelen = dentry->d_name.len;
+ buflen -= namelen + 1;
+ if (buflen < 0)
+ goto Elong;
+ end -= namelen;
+ memcpy(end, dentry->d_name.name, namelen);
+ *--end = '/';
+ dentry = dentry->d_parent;
+ }
+ spin_unlock(&dcache_lock);
+ namelen = strlen(base);
+ /* Strip off excess slashes in base string */
+ while (namelen > 0 && base[namelen - 1] == '/')
+ namelen--;
+ buflen -= namelen;
+ if (buflen < 0)
+ goto Elong;
+ end -= namelen;
+ memcpy(end, base, namelen);
+ return end;
+Elong:
+ return ERR_PTR(-ENAMETOOLONG);
+}
+
+/*
* nfs_follow_mountpoint - handle crossing a mountpoint on the server
* @dentry - dentry of mountpoint
* @nd - nameidata info
@@ -117,3 +166,64 @@ void nfs_release_automount_timer(void)
flush_scheduled_work();
}
}
+
+/*
+ * Clone a mountpoint of the appropriate type
+ */
+static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server, char *devname,
+ struct nfs_clone_mount *mountdata)
+{
+#ifdef CONFIG_NFS_V4
+ struct vfsmount *mnt = NULL;
+ switch (server->rpc_ops->version) {
+ case 2:
+ case 3:
+ mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
+ break;
+ case 4:
+ mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, mountdata);
+ }
+ return mnt;
+#else
+ return vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
+#endif
+}
+
+/**
+ * nfs_do_submount - set up mountpoint when crossing a filesystem boundary
+ * @mnt_parent - mountpoint of parent directory
+ * @dentry - parent directory
+ * @fh - filehandle for new root dentry
+ * @fattr - attributes for new root inode
+ *
+ */
+struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
+ const struct dentry *dentry, struct nfs_fh *fh,
+ struct nfs_fattr *fattr)
+{
+ struct nfs_clone_mount mountdata = {
+ .sb = mnt_parent->mnt_sb,
+ .dentry = dentry,
+ .fh = fh,
+ .fattr = fattr,
+ };
+ struct vfsmount *mnt = ERR_PTR(-ENOMEM);
+ char *page = (char *) __get_free_page(GFP_USER);
+ char *devname;
+
+ dprintk("%s: submounting on %s/%s\n", __FUNCTION__,
+ dentry->d_parent->d_name.name,
+ dentry->d_name.name);
+ if (page == NULL)
+ goto out;
+ devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
+ mnt = (struct vfsmount *)devname;
+ if (IS_ERR(devname))
+ goto free_page;
+ mnt = nfs_do_clone_mount(NFS_SB(mnt_parent->mnt_sb), devname, &mountdata);
+free_page:
+ free_page((unsigned long)page);
+out:
+ dprintk("%s: done\n", __FUNCTION__);
+ return mnt;
+}
diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index a7ed88f..67391ee 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -23,12 +23,11 @@ #include <linux/sunrpc/clnt.h>
#include <linux/nfs.h>
#include <linux/nfs2.h>
#include <linux/nfs_fs.h>
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_XDR
/* #define NFS_PARANOIA 1 */
-extern int nfs_stat_to_errno(int stat);
-
/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO EIO
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index cf186f0..7143b1f 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -20,11 +20,10 @@ #include <linux/smp_lock.h>
#include <linux/nfs_mount.h>
#include "iostat.h"
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_PROC
-extern struct rpc_procinfo nfs3_procedures[];
-
/* A wrapper to handle the EJUKEBOX error message */
static int
nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
@@ -809,8 +808,6 @@ nfs3_proc_pathconf(struct nfs_server *se
return status;
}
-extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
-
static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
if (nfs3_async_handle_jukebox(task, data->inode))
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index f70eee2..0250269 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -22,14 +22,13 @@ #include <linux/nfs.h>
#include <linux/nfs3.h>
#include <linux/nfs_fs.h>
#include <linux/nfsacl.h>
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_XDR
/* Mapping from NFS error code to "errno" error code. */
#define errno_NFSERR_IO EIO
-extern int nfs_stat_to_errno(int);
-
/*
* Declare the space requirements for NFS arguments and replies as
* number of 32bit-words
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
new file mode 100644
index 0000000..ea38d27
--- /dev/null
+++ b/fs/nfs/nfs4namespace.c
@@ -0,0 +1,201 @@
+/*
+ * linux/fs/nfs/nfs4namespace.c
+ *
+ * Copyright (C) 2005 Trond Myklebust <Trond.Myklebust at netapp.com>
+ *
+ * NFSv4 namespace
+ */
+
+#include <linux/config.h>
+
+#include <linux/dcache.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
+#include <linux/nfs_fs.h>
+#include <linux/string.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/vfs.h>
+#include <linux/inet.h>
+#include "internal.h"
+
+#define NFSDBG_FACILITY NFSDBG_VFS
+
+/*
+ * Check if fs_root is valid
+ */
+static inline char *nfs4_pathname_string(struct nfs4_pathname *pathname,
+ char *buffer, ssize_t buflen)
+{
+ char *end = buffer + buflen;
+ int n;
+
+ *--end = '\0';
+ buflen--;
+
+ n = pathname->ncomponents;
+ while (--n >= 0) {
+ struct nfs4_string *component = &pathname->components[n];
+ buflen -= component->len + 1;
+ if (buflen < 0)
+ goto Elong;
+ end -= component->len;
+ memcpy(end, component->data, component->len);
+ *--end = '/';
+ }
+ return end;
+Elong:
+ return ERR_PTR(-ENAMETOOLONG);
+}
+
+
+/**
+ * nfs_follow_referral - set up mountpoint when hitting a referral on moved error
+ * @mnt_parent - mountpoint of parent directory
+ * @dentry - parent directory
+ * @fspath - fs path returned in fs_locations
+ * @mntpath - mount path to new server
+ * @hostname - hostname of new server
+ * @addr - host addr of new server
+ *
+ */
+static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
+ const struct dentry *dentry,
+ 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,
+ };
+ char *page, *page2;
+ char *path, *fs_path;
+ char *devname;
+ int loc, s;
+
+ if (locations == NULL || locations->nlocations <= 0)
+ goto out;
+
+ 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)
+ goto out;
+ page2 = (char *) __get_free_page(GFP_USER);
+ if (page2 == NULL)
+ 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;
+ }
+
+ devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE);
+ if (IS_ERR(devname)) {
+ mnt = (struct vfsmount *)devname;
+ goto out_free;
+ }
+
+ loc = 0;
+ while (loc < locations->nlocations && IS_ERR(mnt)) {
+ struct nfs4_fs_location *location = &locations->locations[loc];
+ char *mnt_path;
+
+ if (location == NULL || location->nservers <= 0 ||
+ location->rootpath.ncomponents == 0) {
+ loc++;
+ continue;
+ }
+
+ mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE);
+ if (IS_ERR(mnt_path)) {
+ loc++;
+ continue;
+ }
+ mountdata.mnt_path = mnt_path;
+
+ s = 0;
+ while (s < location->nservers) {
+ struct sockaddr_in addr = {};
+
+ if (location->servers[s].len <= 0 ||
+ valid_ipaddr4(location->servers[s].data) < 0) {
+ s++;
+ continue;
+ }
+
+ mountdata.hostname = location->servers[s].data;
+ addr.sin_addr.s_addr = in_aton(mountdata.hostname);
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(NFS_PORT);
+ mountdata.addr = &addr;
+
+ mnt = vfs_kern_mount(&nfs_referral_nfs4_fs_type, 0, devname, &mountdata);
+ if (!IS_ERR(mnt)) {
+ break;
+ }
+ s++;
+ }
+ loc++;
+ }
+
+out_free:
+ free_page((unsigned long)page);
+ free_page((unsigned long)page2);
+out:
+ dprintk("%s: done\n", __FUNCTION__);
+ return mnt;
+}
+
+/*
+ * nfs_do_refmount - handle crossing a referral on server
+ * @dentry - dentry of referral
+ * @nd - nameidata info
+ *
+ */
+struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
+{
+ struct vfsmount *mnt = ERR_PTR(-ENOENT);
+ struct dentry *parent;
+ struct nfs4_fs_locations *fs_locations = NULL;
+ struct page *page;
+ int err;
+
+ /* BUG_ON(IS_ROOT(dentry)); */
+ dprintk("%s: enter\n", __FUNCTION__);
+
+ page = alloc_page(GFP_KERNEL);
+ if (page == NULL)
+ goto out;
+
+ fs_locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
+ if (fs_locations == NULL)
+ goto out_free;
+
+ /* Get locations */
+ parent = dget_parent(dentry);
+ 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 ||
+ fs_locations->fs_path.ncomponents <= 0)
+ goto out_free;
+
+ mnt = nfs_follow_referral(mnt_parent, dentry, fs_locations);
+out_free:
+ __free_page(page);
+ kfree(fs_locations);
+out:
+ dprintk("%s: done\n", __FUNCTION__);
+ return mnt;
+}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 5d4fe0b..1ed6d17 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -65,8 +65,6 @@ static int nfs4_async_handle_error(struc
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);
-extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
-extern struct rpc_procinfo nfs4_procedures[];
/* Prevent leaks of NFSv4 errors into userland */
int nfs4_map_errors(int err)
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 106aca3..f08886c 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -369,7 +369,7 @@ nfs_scan_list(struct list_head *head, st
return res;
}
-int nfs_init_nfspagecache(void)
+int __init nfs_init_nfspagecache(void)
{
nfs_page_cachep = kmem_cache_create("nfs_page",
sizeof(struct nfs_page),
@@ -381,7 +381,7 @@ int nfs_init_nfspagecache(void)
return 0;
}
-void nfs_destroy_nfspagecache(void)
+void __exit nfs_destroy_nfspagecache(void)
{
if (kmem_cache_destroy(nfs_page_cachep))
printk(KERN_INFO "nfs_page: not all structures were freed\n");
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 9dd85ca..b3899ea 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -44,11 +44,10 @@ #include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/lockd/bind.h>
#include <linux/smp_lock.h>
+#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_PROC
-extern struct rpc_procinfo nfs_procedures[];
-
/*
* Bare-bones access to getattr: this is for nfs_read_super.
*/
@@ -611,8 +610,6 @@ nfs_proc_pathconf(struct nfs_server *ser
return 0;
}
-extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
-
static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
if (task->tk_status >= 0) {
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index c188433..5458ffb 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -651,7 +651,7 @@ int nfs_readpages(struct file *filp, str
return ret;
}
-int nfs_init_readpagecache(void)
+int __init nfs_init_readpagecache(void)
{
nfs_rdata_cachep = kmem_cache_create("nfs_read_data",
sizeof(struct nfs_read_data),
@@ -668,7 +668,7 @@ int nfs_init_readpagecache(void)
return 0;
}
-void nfs_destroy_readpagecache(void)
+void __exit nfs_destroy_readpagecache(void)
{
mempool_destroy(nfs_rdata_mempool);
if (kmem_cache_destroy(nfs_rdata_cachep))
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
new file mode 100644
index 0000000..c50de88
--- /dev/null
+++ b/fs/nfs/super.c
@@ -0,0 +1,1510 @@
+/*
+ * linux/fs/nfs/super.c
+ *
+ * Copyright (C) 1992 Rick Sladkey
+ *
+ * nfs superblock handling functions
+ *
+ * Modularised by Alan Cox <Alan.Cox at linux.org>, while hacking some
+ * experimental NFS changes. Modularisation taken straight from SYS5 fs.
+ *
+ * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
+ * J.S.Peatfield at damtp.cam.ac.uk
+ *
+ * Split from inode.c by David Howells <dhowells at redhat.com>
+ *
+ */
+
+#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 <asm/uaccess.h>
+
+#include "nfs4_fs.h"
+#include "callback.h"
+#include "delegation.h"
+#include "iostat.h"
+#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 vfsmount *, 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 void nfs_kill_super(struct super_block *);
+
+static struct file_system_type nfs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "nfs",
+ .get_sb = nfs_get_sb,
+ .kill_sb = nfs_kill_super,
+ .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+
+struct file_system_type clone_nfs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "nfs",
+ .get_sb = nfs_clone_nfs_sb,
+ .kill_sb = nfs_kill_super,
+ .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+
+static struct super_operations nfs_sops = {
+ .alloc_inode = nfs_alloc_inode,
+ .destroy_inode = nfs_destroy_inode,
+ .write_inode = nfs_write_inode,
+ .delete_inode = nfs_delete_inode,
+ .statfs = nfs_statfs,
+ .clear_inode = nfs_clear_inode,
+ .umount_begin = nfs_umount_begin,
+ .show_options = nfs_show_options,
+ .show_stats = nfs_show_stats,
+};
+
+#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 void nfs4_kill_super(struct super_block *sb);
+
+static struct file_system_type nfs4_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "nfs4",
+ .get_sb = nfs4_get_sb,
+ .kill_sb = nfs4_kill_super,
+ .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+
+struct file_system_type clone_nfs4_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "nfs4",
+ .get_sb = nfs_clone_nfs4_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 = {
+ .owner = THIS_MODULE,
+ .name = "nfs4",
+ .get_sb = nfs_referral_nfs4_sb,
+ .kill_sb = nfs4_kill_super,
+ .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
+};
+
+static struct super_operations nfs4_sops = {
+ .alloc_inode = nfs_alloc_inode,
+ .destroy_inode = nfs_destroy_inode,
+ .write_inode = nfs_write_inode,
+ .delete_inode = nfs_delete_inode,
+ .statfs = nfs_statfs,
+ .clear_inode = nfs4_clear_inode,
+ .umount_begin = nfs_umount_begin,
+ .show_options = nfs_show_options,
+ .show_stats = nfs_show_stats,
+};
+#endif
+
+static const int nfs_set_port_min = 0;
+static const int nfs_set_port_max = 65535;
+
+unsigned int nfs_callback_set_tcpport;
+unsigned short nfs_callback_tcpport;
+
+/* Default cache timeout is 10 minutes */
+unsigned int nfs_idmap_cache_timeout = 600 * HZ;
+
+static int param_set_port(const char *val, struct kernel_param *kp)
+{
+ char *endp;
+ int num = simple_strtol(val, &endp, 0);
+ if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max)
+ return -EINVAL;
+ *((int *)kp->arg) = num;
+ return 0;
+}
+
+module_param_call(callback_tcpport, param_set_port, param_get_int,
+ &nfs_callback_set_tcpport, 0644);
+
+static int param_set_idmap_timeout(const char *val, struct kernel_param *kp)
+{
+ char *endp;
+ int num = simple_strtol(val, &endp, 0);
+ int jif = num * HZ;
+ if (endp == val || *endp || num < 0 || jif < num)
+ return -EINVAL;
+ *((int *)kp->arg) = jif;
+ return 0;
+}
+
+module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int,
+ &nfs_idmap_cache_timeout, 0644);
+
+/*
+ * Register the NFS filesystems
+ */
+int __init register_nfs_fs(void)
+{
+ int ret;
+
+ ret = register_filesystem(&nfs_fs_type);
+ if (ret < 0)
+ goto error_0;
+
+#ifdef CONFIG_NFS_V4
+ ret = nfs_register_sysctl();
+ if (ret < 0)
+ goto error_1;
+ ret = register_filesystem(&nfs4_fs_type);
+ if (ret < 0)
+ goto error_2;
+#endif
+ return 0;
+
+#ifdef CONFIG_NFS_V4
+error_2:
+ nfs_unregister_sysctl();
+error_1:
+ unregister_filesystem(&nfs_fs_type);
+#endif
+error_0:
+ return ret;
+}
+
+/*
+ * Unregister the NFS filesystems
+ */
+void __exit unregister_nfs_fs(void)
+{
+#ifdef CONFIG_NFS_V4
+ unregister_filesystem(&nfs4_fs_type);
+ nfs_unregister_sysctl();
+#endif
+ unregister_filesystem(&nfs_fs_type);
+}
+
+/*
+ * Deliver file system statistics to userspace
+ */
+static int nfs_statfs(struct vfsmount *mnt, struct kstatfs *buf)
+{
+ struct super_block *sb = mnt->mnt_sb;
+ struct nfs_server *server = NFS_SB(sb);
+ unsigned char blockbits;
+ unsigned long blockres;
+ struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
+ struct nfs_fattr fattr;
+ struct nfs_fsstat res = {
+ .fattr = &fattr,
+ };
+ int error;
+
+ lock_kernel();
+
+ error = server->rpc_ops->statfs(server, rootfh, &res);
+ buf->f_type = NFS_SUPER_MAGIC;
+ if (error < 0)
+ goto out_err;
+
+ /*
+ * Current versions of glibc do not correctly handle the
+ * case where f_frsize != f_bsize. Eventually we want to
+ * report the value of wtmult in this field.
+ */
+ buf->f_frsize = sb->s_blocksize;
+
+ /*
+ * On most *nix systems, f_blocks, f_bfree, and f_bavail
+ * are reported in units of f_frsize. Linux hasn't had
+ * an f_frsize field in its statfs struct until recently,
+ * thus historically Linux's sys_statfs reports these
+ * fields in units of f_bsize.
+ */
+ buf->f_bsize = sb->s_blocksize;
+ blockbits = sb->s_blocksize_bits;
+ blockres = (1 << blockbits) - 1;
+ buf->f_blocks = (res.tbytes + blockres) >> blockbits;
+ buf->f_bfree = (res.fbytes + blockres) >> blockbits;
+ buf->f_bavail = (res.abytes + blockres) >> blockbits;
+
+ buf->f_files = res.tfiles;
+ buf->f_ffree = res.afiles;
+
+ buf->f_namelen = server->namelen;
+ out:
+ unlock_kernel();
+ return 0;
+
+ out_err:
+ dprintk("%s: statfs error = %d\n", __FUNCTION__, -error);
+ buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
+ goto out;
+
+}
+
+/*
+ * Describe the mount options in force on this server representation
+ */
+static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults)
+{
+ static struct proc_nfs_info {
+ int flag;
+ char *str;
+ char *nostr;
+ } nfs_info[] = {
+ { NFS_MOUNT_SOFT, ",soft", ",hard" },
+ { NFS_MOUNT_INTR, ",intr", "" },
+ { NFS_MOUNT_NOCTO, ",nocto", "" },
+ { NFS_MOUNT_NOAC, ",noac", "" },
+ { NFS_MOUNT_NONLM, ",nolock", "" },
+ { NFS_MOUNT_NOACL, ",noacl", "" },
+ { 0, NULL, NULL }
+ };
+ struct proc_nfs_info *nfs_infop;
+ 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);
+ for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
+ if (nfss->flags & nfs_infop->flag)
+ seq_puts(m, nfs_infop->str);
+ else
+ seq_puts(m, nfs_infop->nostr);
+ }
+ switch (nfss->client->cl_xprt->prot) {
+ case IPPROTO_TCP:
+ proto = "tcp";
+ break;
+ case IPPROTO_UDP:
+ proto = "udp";
+ break;
+ default:
+ snprintf(buf, sizeof(buf), "%u", nfss->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);
+}
+
+/*
+ * Describe the mount options on this VFS mountpoint
+ */
+static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
+{
+ struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
+
+ nfs_show_mount_options(m, nfss, 0);
+
+ seq_puts(m, ",addr=");
+ seq_escape(m, nfss->hostname, " \t\n\\");
+
+ return 0;
+}
+
+/*
+ * Present statistical information for this VFS mountpoint
+ */
+static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt)
+{
+ int i, cpu;
+ struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
+ struct rpc_auth *auth = nfss->client->cl_auth;
+ struct nfs_iostats totals = { };
+
+ seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS);
+
+ /*
+ * Display all mount option settings
+ */
+ seq_printf(m, "\n\topts:\t");
+ seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw");
+ seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : "");
+ seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : "");
+ seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : "");
+ nfs_show_mount_options(m, nfss, 1);
+
+ seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
+
+ 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);
+
+#ifdef CONFIG_NFS_V4
+ if (nfss->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]);
+ seq_printf(m, ",acl=0x%x", nfss->acl_bitmask);
+ }
+#endif
+
+ /*
+ * Display security flavor in effect for this mount
+ */
+ seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor);
+ if (auth->au_flavor)
+ seq_printf(m, ",pseudoflavor=%d", auth->au_flavor);
+
+ /*
+ * Display superblock I/O counters
+ */
+ for_each_possible_cpu(cpu) {
+ struct nfs_iostats *stats;
+
+ preempt_disable();
+ stats = per_cpu_ptr(nfss->io_stats, cpu);
+
+ for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
+ totals.events[i] += stats->events[i];
+ for (i = 0; i < __NFSIOS_BYTESMAX; i++)
+ totals.bytes[i] += stats->bytes[i];
+
+ preempt_enable();
+ }
+
+ seq_printf(m, "\n\tevents:\t");
+ for (i = 0; i < __NFSIOS_COUNTSMAX; i++)
+ seq_printf(m, "%lu ", totals.events[i]);
+ seq_printf(m, "\n\tbytes:\t");
+ for (i = 0; i < __NFSIOS_BYTESMAX; i++)
+ seq_printf(m, "%Lu ", totals.bytes[i]);
+ seq_printf(m, "\n");
+
+ rpc_print_iostats(m, nfss->client);
+
+ return 0;
+}
+
+/*
+ * Begin unmount by attempting to remove all automounted mountpoints we added
+ * in response to traversals
+ */
+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.
+ */
+static struct inode *
+nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
+{
+ 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);
+ }
+
+ 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;
+
+ 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;
+ }
+ sb->s_root = d_alloc_root(root_inode);
+ if (!sb->s_root) {
+ no_root_error = -ENOMEM;
+ goto out_no_root;
+ }
+ 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;
+
+ 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;
+ }
+ server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
+
+ nfs_super_set_maxbytes(sb, fsinfo.maxfilesize);
+
+ server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
+ server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
+
+ /* 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
+ */
+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_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;
+ }
+
+ clnt->cl_intr = 1;
+ clnt->cl_softrtry = 1;
+
+ return clnt;
+
+out_fail:
+ return clnt;
+}
+
+/*
+ * Clone a server record
+ */
+static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *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;
+ }
+
+ if (sb->s_root) {
+ rpciod_down();
+ kfree(server->hostname);
+ kfree(server);
+ return simple_set_mnt(mnt, sb);
+ }
+
+ 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;
+}
+
+/*
+ * 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.
+ */
+static int
+nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
+{
+ struct nfs_server *server;
+ rpc_authflavor_t authflavor;
+
+ 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
+
+ /* 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.
+ */
+ 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);
+}
+
+static int nfs_set_super(struct super_block *s, void *data)
+{
+ s->s_fs_info = data;
+ return set_anon_super(s, data);
+}
+
+static int nfs_compare_super(struct super_block *sb, void *data)
+{
+ struct nfs_server *server = data;
+ struct nfs_server *old = NFS_SB(sb);
+
+ if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
+ return 0;
+ if (old->addr.sin_port != server->addr.sin_port)
+ return 0;
+ return !nfs_compare_fh(&old->fh, &server->fh);
+}
+
+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_mount_data *data = raw_data;
+
+ 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 */
+
+ error = -ENOMEM;
+ server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
+ if (!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;
+ }
+
+ s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
+ if (IS_ERR(s)) {
+ error = PTR_ERR(s);
+ goto out_err_rpciod;
+ }
+
+ if (s->s_root)
+ goto out_rpciod_down;
+
+ s->s_flags = flags;
+
+ error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
+ if (error) {
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ return error;
+ }
+ s->s_flags |= MS_ACTIVE;
+ return simple_set_mnt(mnt, s);
+
+out_rpciod_down:
+ rpciod_down();
+ kfree(server);
+ return simple_set_mnt(mnt, s);
+
+out_err_rpciod:
+ rpciod_down();
+out_err:
+ kfree(server);
+out_err_noserver:
+ return error;
+}
+
+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;
+}
+
+static int nfs_clone_nfs_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);
+}
+
+#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);
+ }
+
+ /* 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;
+ }
+
+ if (server->nfs4_state->cl_idmap == NULL) {
+ dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ 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;
+ }
+ }
+ 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;
+
+ server->acregmin = data->acregmin*HZ;
+ server->acregmax = data->acregmax*HZ;
+ server->acdirmin = data->acdirmin*HZ;
+ server->acdirmax = data->acdirmax*HZ;
+
+ server->rpc_ops = &nfs_v4_clientops;
+
+ nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
+
+ server->retrans_timeo = timeparms.to_initval;
+ server->retrans_count = timeparms.to_retries;
+
+ /* 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;
+ }
+ }
+
+ 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;
+ }
+
+ sb->s_time_gran = 1;
+
+ sb->s_op = &nfs4_sops;
+ err = nfs_sb_init(sb, authflavour);
+
+ out_fail:
+ return err;
+}
+
+static int nfs4_compare_super(struct super_block *sb, void *data)
+{
+ 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;
+}
+
+static void *
+nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
+{
+ void *p = NULL;
+
+ if (!src->len)
+ return ERR_PTR(-EINVAL);
+ if (src->len < maxlen)
+ maxlen = src->len;
+ if (dst == NULL) {
+ p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
+ if (p == NULL)
+ return ERR_PTR(-ENOMEM);
+ }
+ if (copy_from_user(dst, src->data, maxlen)) {
+ kfree(p);
+ return ERR_PTR(-EFAULT);
+ }
+ dst[maxlen] = '\0';
+ return dst;
+}
+
+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;
+ void *p;
+
+ if (data == NULL) {
+ dprintk("%s: missing data argument\n", __FUNCTION__);
+ return -EINVAL;
+ }
+ if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
+ dprintk("%s: bad mount version\n", __FUNCTION__);
+ 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);
+
+ p = nfs_copy_user_string(NULL, &data->hostname, 256);
+ if (IS_ERR(p))
+ goto out_err;
+ server->hostname = p;
+
+ p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
+ if (IS_ERR(p))
+ goto out_err;
+ server->mnt_path = p;
+
+ p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
+ sizeof(server->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;
+ }
+
+ s = sget(fs_type, nfs4_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);
+ }
+
+ s->s_flags = flags;
+
+ error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
+ if (error) {
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ return error;
+ }
+ s->s_flags |= MS_ACTIVE;
+ return simple_set_mnt(mnt, s);
+out_err:
+ error = PTR_ERR(p);
+out_free:
+ kfree(server->mnt_path);
+ kfree(server->hostname);
+ kfree(server);
+ return error;
+}
+
+static void nfs4_kill_super(struct super_block *sb)
+{
+ struct nfs_server *server = NFS_SB(sb);
+
+ nfs_return_all_delegations(sb);
+ kill_anon_super(sb);
+
+ nfs4_renewd_prepare_shutdown(server);
+
+ if (server->client != NULL && !IS_ERR(server->client))
+ rpc_shutdown_client(server->client);
+
+ destroy_nfsv4_state(server);
+
+ rpciod_down();
+
+ nfs_free_iostats(server->io_stats);
+ kfree(server->hostname);
+ kfree(server);
+ nfs_release_automount_timer();
+}
+
+/*
+ * Constructs the SERVER-side path
+ */
+static inline char *nfs4_dup_path(const struct dentry *dentry)
+{
+ char *page = (char *) __get_free_page(GFP_USER);
+ char *path;
+
+ path = nfs4_path(dentry, page, PAGE_SIZE);
+ if (!IS_ERR(path)) {
+ int len = PAGE_SIZE + page - path;
+ char *tmp = path;
+
+ path = kmalloc(len, GFP_KERNEL);
+ if (path)
+ memcpy(path, tmp, len);
+ else
+ path = ERR_PTR(-ENOMEM);
+ }
+ 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;
+ }
+ 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);
+}
+
+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;
+}
+
+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;
+
+ 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;
+}
+
+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);
+}
+
+#endif
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index a515ec7..1bb2641 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1508,7 +1508,7 @@ int nfs_sync_inode_wait(struct inode *in
return ret;
}
-int nfs_init_writepagecache(void)
+int __init nfs_init_writepagecache(void)
{
nfs_wdata_cachep = kmem_cache_create("nfs_write_data",
sizeof(struct nfs_write_data),
@@ -1530,7 +1530,7 @@ int nfs_init_writepagecache(void)
return 0;
}
-void nfs_destroy_writepagecache(void)
+void __exit nfs_destroy_writepagecache(void)
{
mempool_destroy(nfs_commit_mempool);
mempool_destroy(nfs_wdata_mempool);
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 363eced..8f5c098 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -312,8 +312,6 @@ extern struct vfsmount *nfs_do_submount(
const struct dentry *dentry,
struct nfs_fh *fh,
struct nfs_fattr *fattr);
-extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent,
- struct dentry *dentry);
/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
extern u32 root_nfs_parse_addr(char *name); /*__init*/
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