[Libguestfs] [PATCH 36/67] daemon: Move all RESOLVE macros to daemon/stubs.c.
Richard W.M. Jones
rjones at redhat.com
Sat Aug 24 11:04:36 UTC 2013
From: "Richard W.M. Jones" <rjones at redhat.com>
These macros are pretty horrible to use, with unexpected side-effects.
Move them exclusively into the generated code and rewrite the one
place in the general C code which used them.
There's no functional change in this code.
(cherry picked from commit 89cf1c1163f5c01f2335b7c030bb884be3310394)
---
daemon/daemon.h | 93 -------------------------------------
daemon/ext2.c | 13 +++++-
generator/daemon.ml | 130 +++++++++++++++++++++++++++++++++++++++++++++-------
3 files changed, 125 insertions(+), 111 deletions(-)
diff --git a/daemon/daemon.h b/daemon/daemon.h
index 4887d21..d3a0d01 100644
--- a/daemon/daemon.h
+++ b/daemon/daemon.h
@@ -338,99 +338,6 @@ is_zero (const char *buffer, size_t size)
} \
} while (0)
-/* All functions that need an argument that is a device or partition name
- * must call this macro. It checks that the device exists and does
- * device name translation (described in the guestfs(3) manpage).
- * Note that the "path" argument may be modified.
- *
- * NB. Cannot be used for FileIn functions.
- */
-#define RESOLVE_DEVICE(path,cancel_stmt,fail_stmt) \
- do { \
- if (STRNEQLEN ((path), "/dev/", 5)) { \
- cancel_stmt; \
- reply_with_error ("%s: %s: expecting a device name", __func__, (path)); \
- fail_stmt; \
- } \
- if (is_root_device (path)) { \
- cancel_stmt; \
- reply_with_error ("%s: %s: device not found", __func__, path); \
- fail_stmt; \
- } \
- if (device_name_translation ((path)) == -1) { \
- int err = errno; \
- cancel_stmt; \
- errno = err; \
- reply_with_perror ("%s: %s", __func__, path); \
- fail_stmt; \
- } \
- } while (0)
-
-/* All functions that take a mountable argument must call this macro.
- * It parses the mountable into a mountable_t, ensures any
- * underlying device exists, and does device name translation
- * (described in the guestfs(3) manpage).
- *
- * Note that the "string" argument may be modified.
- */
-#define RESOLVE_MOUNTABLE(string,mountable,cancel_stmt,fail_stmt) \
- do { \
- if (STRPREFIX ((string), "btrfsvol:")) { \
- if (parse_btrfsvol ((string) + strlen ("btrfsvol:"), &(mountable)) == -1)\
- { \
- cancel_stmt; \
- reply_with_error ("%s: %s: expecting a btrfs volume", \
- __func__, (string)); \
- fail_stmt; \
- } \
- } \
- \
- else { \
- (mountable).type = MOUNTABLE_DEVICE; \
- (mountable).device = (string); \
- (mountable).volume = NULL; \
- RESOLVE_DEVICE((string), cancel_stmt, fail_stmt); \
- } \
- } while (0)
-
-/* Helper for functions which need either an absolute path in the
- * mounted filesystem, OR a /dev/ device which exists.
- *
- * NB. Cannot be used for FileIn functions.
- *
- * NB #2: Functions which mix filenames and device paths should be
- * avoided, and existing functions should be deprecated. This is
- * because we intend in future to make device parameters a distinct
- * type from filenames.
- */
-#define REQUIRE_ROOT_OR_RESOLVE_DEVICE(path,cancel_stmt,fail_stmt) \
- do { \
- if (STREQLEN ((path), "/dev/", 5)) \
- RESOLVE_DEVICE ((path), cancel_stmt, fail_stmt); \
- else { \
- NEED_ROOT (cancel_stmt, fail_stmt); \
- ABS_PATH ((path), cancel_stmt, fail_stmt); \
- } \
- } while (0)
-
-/* Helper for functions which need either an absolute path in the
- * mounted filesystem, OR a valid mountable description.
- */
-#define REQUIRE_ROOT_OR_RESOLVE_MOUNTABLE(string, mountable, \
- cancel_stmt, fail_stmt) \
- do { \
- if (STREQLEN ((string), "/dev/", strlen ("/dev/")) || (string)[0] != '/') {\
- RESOLVE_MOUNTABLE (string, mountable, cancel_stmt, fail_stmt); \
- } \
- \
- else { \
- NEED_ROOT (cancel_stmt, fail_stmt); \
- (mountable).type = MOUNTABLE_PATH; \
- (mountable).device = (string); \
- } \
- } while (0) \
-
-
/* NB:
* (1) You must match CHROOT_IN and CHROOT_OUT even along error paths.
* (2) You must not change directory! cwd must always be "/", otherwise
diff --git a/daemon/ext2.c b/daemon/ext2.c
index ff785b7..d1ce020 100644
--- a/daemon/ext2.c
+++ b/daemon/ext2.c
@@ -946,6 +946,17 @@ do_mke2fs (const char *device, /* 0 */
* have to do it manually here, but note that LABEL=.. and
* UUID=.. are valid strings which do not require translation.
*/
+ if (STRPREFIX (journaldevice, "/dev/")) {
+ if (is_root_device (journaldevice)) {
+ reply_with_error ("%s: device not found", journaldevice);
+ return -1;
+ }
+ if (device_name_translation ((char *) journaldevice) == -1) {
+ reply_with_perror ("%s", journaldevice);
+ return -1;
+ }
+ }
+
journaldevice_s = malloc (strlen (journaldevice) + 8);
if (!journaldevice_s) {
reply_with_perror ("malloc");
@@ -953,8 +964,6 @@ do_mke2fs (const char *device, /* 0 */
}
sprintf (journaldevice_s, "device=%s", journaldevice);
- if (STRPREFIX (&journaldevice_s[7], "/dev/"))
- RESOLVE_DEVICE (&journaldevice_s[7], , return -1);
ADD_ARG (argv, i, "-J");
ADD_ARG (argv, i, journaldevice_s);
diff --git a/generator/daemon.ml b/generator/daemon.ml
index e68622b..b08a9c2 100644
--- a/generator/daemon.ml
+++ b/generator/daemon.ml
@@ -74,22 +74,120 @@ let generate_daemon_actions_h () =
and generate_daemon_actions () =
generate_header CStyle GPLv2plus;
- pr "#include <config.h>\n";
- pr "\n";
- pr "#include <stdio.h>\n";
- pr "#include <stdlib.h>\n";
- pr "#include <string.h>\n";
- pr "#include <inttypes.h>\n";
- pr "#include <errno.h>\n";
- pr "#include <rpc/types.h>\n";
- pr "#include <rpc/xdr.h>\n";
- pr "\n";
- pr "#include \"daemon.h\"\n";
- pr "#include \"c-ctype.h\"\n";
- pr "#include \"guestfs_protocol.h\"\n";
- pr "#include \"actions.h\"\n";
- pr "#include \"optgroups.h\"\n";
- pr "\n";
+ pr "\
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <rpc/types.h>
+#include <rpc/xdr.h>
+
+#include \"daemon.h\"
+#include \"c-ctype.h\"
+#include \"guestfs_protocol.h\"
+#include \"actions.h\"
+#include \"optgroups.h\"
+
+/* Some macros to make resolving devices easier. These used to
+ * be available in daemon.h but now they are only used by stubs.
+ */
+
+/* All functions that need an argument that is a device or partition name
+ * must call this macro. It checks that the device exists and does
+ * device name translation (described in the guestfs(3) manpage).
+ * Note that the \"path\" argument may be modified.
+ *
+ * NB. Cannot be used for FileIn functions.
+ */
+#define RESOLVE_DEVICE(path,cancel_stmt,fail_stmt) \\
+ do { \\
+ if (STRNEQLEN ((path), \"/dev/\", 5)) { \\
+ cancel_stmt; \\
+ reply_with_error (\"%%s: %%s: expecting a device name\", __func__, (path)); \\
+ fail_stmt; \\
+ } \\
+ if (is_root_device (path)) { \\
+ cancel_stmt; \\
+ reply_with_error (\"%%s: %%s: device not found\", __func__, path); \\
+ fail_stmt; \\
+ } \\
+ if (device_name_translation ((path)) == -1) { \\
+ int err = errno; \\
+ cancel_stmt; \\
+ errno = err; \\
+ reply_with_perror (\"%%s: %%s\", __func__, path); \\
+ fail_stmt; \\
+ } \\
+ } while (0)
+
+/* All functions that take a mountable argument must call this macro.
+ * It parses the mountable into a mountable_t, ensures any
+ * underlying device exists, and does device name translation
+ * (described in the guestfs(3) manpage).
+ *
+ * Note that the \"string\" argument may be modified.
+ */
+#define RESOLVE_MOUNTABLE(string,mountable,cancel_stmt,fail_stmt) \\
+ do { \\
+ if (STRPREFIX ((string), \"btrfsvol:\")) { \\
+ if (parse_btrfsvol ((string) + strlen (\"btrfsvol:\"), &(mountable)) == -1)\\
+ { \\
+ cancel_stmt; \\
+ reply_with_error (\"%%s: %%s: expecting a btrfs volume\", \\
+ __func__, (string)); \\
+ fail_stmt; \\
+ } \\
+ } \\
+ \\
+ else { \\
+ (mountable).type = MOUNTABLE_DEVICE; \\
+ (mountable).device = (string); \\
+ (mountable).volume = NULL; \\
+ RESOLVE_DEVICE((string), cancel_stmt, fail_stmt); \\
+ } \\
+ } while (0)
+
+/* Helper for functions which need either an absolute path in the
+ * mounted filesystem, OR a /dev/ device which exists.
+ *
+ * NB. Cannot be used for FileIn functions.
+ *
+ * NB #2: Functions which mix filenames and device paths should be
+ * avoided, and existing functions should be deprecated. This is
+ * because we intend in future to make device parameters a distinct
+ * type from filenames.
+ */
+#define REQUIRE_ROOT_OR_RESOLVE_DEVICE(path,cancel_stmt,fail_stmt) \\
+ do { \\
+ if (STREQLEN ((path), \"/dev/\", 5)) \\
+ RESOLVE_DEVICE ((path), cancel_stmt, fail_stmt); \\
+ else { \\
+ NEED_ROOT (cancel_stmt, fail_stmt); \\
+ ABS_PATH ((path), cancel_stmt, fail_stmt); \\
+ } \\
+ } while (0)
+
+/* Helper for functions which need either an absolute path in the
+ * mounted filesystem, OR a valid mountable description.
+ */
+#define REQUIRE_ROOT_OR_RESOLVE_MOUNTABLE(string, mountable, \\
+ cancel_stmt, fail_stmt) \\
+ do { \\
+ if (STREQLEN ((string), \"/dev/\", strlen (\"/dev/\")) || (string)[0] != '/') {\\
+ RESOLVE_MOUNTABLE (string, mountable, cancel_stmt, fail_stmt); \\
+ } \\
+ \\
+ else { \\
+ NEED_ROOT (cancel_stmt, fail_stmt); \\
+ (mountable).type = MOUNTABLE_PATH; \\
+ (mountable).device = (string); \\
+ } \\
+ } while (0) \\
+
+";
List.iter (
fun { name = name; style = ret, args, optargs; optional = optional } ->
--
1.8.3.1
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