diff options
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/fs/namei.c b/fs/namei.c index defaa47c11d..a83160acd74 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -107,6 +107,8 @@ * any extra contention... */ +static int fastcall 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 * kernel data space before using them.. @@ -998,7 +1000,7 @@ return_err: * Retry the whole path once, forcing real lookup requests * instead of relying on the dcache. */ -int fastcall link_path_walk(const char *name, struct nameidata *nd) +static int fastcall link_path_walk(const char *name, struct nameidata *nd) { struct nameidata save = *nd; int result; @@ -1022,7 +1024,7 @@ int fastcall link_path_walk(const char *name, struct nameidata *nd) return result; } -int fastcall path_walk(const char * name, struct nameidata *nd) +static int fastcall path_walk(const char * name, struct nameidata *nd) { current->total_link_count = 0; return link_path_walk(name, nd); @@ -1172,6 +1174,37 @@ int fastcall path_lookup(const char *name, unsigned int flags, return do_path_lookup(AT_FDCWD, name, flags, nd); } +/** + * vfs_path_lookup - lookup a file path relative to a dentry-vfsmount pair + * @dentry: pointer to dentry of the base directory + * @mnt: pointer to vfs mount of the base directory + * @name: pointer to file name + * @flags: lookup flags + * @nd: pointer to nameidata + */ +int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt, + const char *name, unsigned int flags, + struct nameidata *nd) +{ + int retval; + + /* same as do_path_lookup */ + nd->last_type = LAST_ROOT; + nd->flags = flags; + nd->depth = 0; + + nd->mnt = mntget(mnt); + nd->dentry = dget(dentry); + + retval = path_walk(name, nd); + if (unlikely(!retval && !audit_dummy_context() && nd->dentry && + nd->dentry->d_inode)) + audit_inode(name, nd->dentry->d_inode); + + return retval; + +} + static int __path_lookup_intent_open(int dfd, const char *name, unsigned int lookup_flags, struct nameidata *nd, int open_flags, int create_mode) @@ -2774,8 +2807,8 @@ EXPORT_SYMBOL(__page_symlink); EXPORT_SYMBOL(page_symlink); EXPORT_SYMBOL(page_symlink_inode_operations); EXPORT_SYMBOL(path_lookup); +EXPORT_SYMBOL(vfs_path_lookup); EXPORT_SYMBOL(path_release); -EXPORT_SYMBOL(path_walk); EXPORT_SYMBOL(permission); EXPORT_SYMBOL(vfs_permission); EXPORT_SYMBOL(file_permission); |