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authorLinus Torvalds <torvalds@linux-foundation.org>2008-03-25 08:57:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-03-25 08:57:47 -0700
commit7ed7fe5e82c9fc8473974fbd7389d169b8f17c77 (patch)
treeff6ff57c88c887133f1585473e7d74981d0dc88c /fs/namei.c
parenta4083c9271e0a697278e089f2c0b9a95363ada0a (diff)
parenta02f76c34d7d6d30b63ac64a8b34dea68593e8da (diff)
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: [PATCH] get stack footprint of pathname resolution back to relative sanity [PATCH] double iput() on failure exit in hugetlb [PATCH] double dput() on failure exit in tiny-shmem [PATCH] fix up new filp allocators [PATCH] check for null vfsmount in dentry_open() [PATCH] reiserfs: eliminate private use of struct file in xattr [PATCH] sanitize hppfs hppfs pass vfsmount to dentry_open() [PATCH] restore export of do_kern_mount()
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c63
1 files changed, 32 insertions, 31 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 6b7a0ee..8cf9bb9c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -106,7 +106,7 @@
* any extra contention...
*/
-static int link_path_walk(const char *name, struct nameidata *nd);
+static int __link_path_walk(const char *name, struct nameidata *nd);
/* In order to reduce some races, while at the same time doing additional
* checking and hopefully speeding things up, we copy filenames to the
@@ -563,6 +563,37 @@ walk_init_root(const char *name, struct nameidata *nd)
return 1;
}
+/*
+ * Wrapper to retry pathname resolution whenever the underlying
+ * file system returns an ESTALE.
+ *
+ * Retry the whole path once, forcing real lookup requests
+ * instead of relying on the dcache.
+ */
+static __always_inline int link_path_walk(const char *name, struct nameidata *nd)
+{
+ struct path save = nd->path;
+ int result;
+
+ /* make sure the stuff we saved doesn't go away */
+ dget(save.dentry);
+ mntget(save.mnt);
+
+ result = __link_path_walk(name, nd);
+ if (result == -ESTALE) {
+ /* nd->path had been dropped */
+ nd->path = save;
+ dget(nd->path.dentry);
+ mntget(nd->path.mnt);
+ nd->flags |= LOOKUP_REVAL;
+ result = __link_path_walk(name, nd);
+ }
+
+ path_put(&save);
+
+ return result;
+}
+
static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *link)
{
int res = 0;
@@ -1020,36 +1051,6 @@ return_err:
return err;
}
-/*
- * Wrapper to retry pathname resolution whenever the underlying
- * file system returns an ESTALE.
- *
- * Retry the whole path once, forcing real lookup requests
- * instead of relying on the dcache.
- */
-static int link_path_walk(const char *name, struct nameidata *nd)
-{
- struct nameidata save = *nd;
- int result;
-
- /* make sure the stuff we saved doesn't go away */
- dget(save.path.dentry);
- mntget(save.path.mnt);
-
- result = __link_path_walk(name, nd);
- if (result == -ESTALE) {
- *nd = save;
- dget(nd->path.dentry);
- mntget(nd->path.mnt);
- nd->flags |= LOOKUP_REVAL;
- result = __link_path_walk(name, nd);
- }
-
- path_put(&save.path);
-
- return result;
-}
-
static int path_walk(const char *name, struct nameidata *nd)
{
current->total_link_count = 0;