From aac34df11791d25417f7d756dc277b6f95996b47 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 9 Sep 2013 07:16:41 -0700 Subject: [PATCH] fs: remove vfs_follow_link For a long time no filesystem has been using vfs_follow_link, and as seen by recent filesystem submissions any new use is accidental as well. Remove vfs_follow_link, document the replacement in Documentation/filesystems/porting and also rename __vfs_follow_link to match its only caller better. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro --- Documentation/filesystems/porting | 4 ++++ fs/namei.c | 10 ++-------- include/linux/fs.h | 1 - 3 files changed, 6 insertions(+), 9 deletions(-) diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting index 206a1bdc7321..f0890581f7f6 100644 --- a/Documentation/filesystems/porting +++ b/Documentation/filesystems/porting @@ -451,3 +451,7 @@ in your dentry operations instead. -- [mandatory] ->readdir() is gone now; switch to ->iterate() +[mandatory] + vfs_follow_link has been removed. Filesystems must use nd_set_link + from ->follow_link for normal symlinks, or nd_jump_link for magic + /proc/ style links. diff --git a/fs/namei.c b/fs/namei.c index 409a441ba2ae..b0b2cf25075b 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -660,7 +660,7 @@ static __always_inline void set_root_rcu(struct nameidata *nd) } } -static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *link) +static __always_inline int __follow_link(struct nameidata *nd, const char *link) { int ret; @@ -874,7 +874,7 @@ follow_link(struct path *link, struct nameidata *nd, void **p) error = 0; s = nd_get_link(nd); if (s) { - error = __vfs_follow_link(nd, s); + error = __follow_link(nd, s); if (unlikely(error)) put_link(nd, link, *p); } @@ -4236,11 +4236,6 @@ int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen) return res; } -int vfs_follow_link(struct nameidata *nd, const char *link) -{ - return __vfs_follow_link(nd, link); -} - /* get the link contents into pagecache */ static char *page_getlink(struct dentry * dentry, struct page **ppage) { @@ -4352,7 +4347,6 @@ EXPORT_SYMBOL(vfs_path_lookup); EXPORT_SYMBOL(inode_permission); EXPORT_SYMBOL(unlock_rename); EXPORT_SYMBOL(vfs_create); -EXPORT_SYMBOL(vfs_follow_link); EXPORT_SYMBOL(vfs_link); EXPORT_SYMBOL(vfs_mkdir); EXPORT_SYMBOL(vfs_mknod); diff --git a/include/linux/fs.h b/include/linux/fs.h index 529d8711baba..49e71b0f0e9f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2494,7 +2494,6 @@ extern const struct file_operations generic_ro_fops; #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m)) extern int vfs_readlink(struct dentry *, char __user *, int, const char *); -extern int vfs_follow_link(struct nameidata *, const char *); extern int page_readlink(struct dentry *, char __user *, int); extern void *page_follow_link_light(struct dentry *, struct nameidata *); extern void page_put_link(struct dentry *, struct nameidata *, void *); -- 2.34.1