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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

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* '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()
This commit is contained in:
Linus Torvalds
2008-03-25 08:57:47 -07:00
parent a4083c9271 a02f76c34d
commit 7ed7fe5e82
10 changed files with 303 additions and 367 deletions
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63
fs/namei.c
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@@ -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;