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| author | Al Viro <viro@zeniv.linux.org.uk> | 2020-01-09 15:17:57 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-03-13 21:06:13 -0400 |
| commit | aca2903eefd0f8a3ba672f985182f899b425ca24 (patch) | |
| tree | 424f480d65d35500e118b7030be7a67ffff82583 /fs/namei.c | |
| parent | 56676ec390194930f7504cd84d494c221861bd7f (diff) | |
| download | lwn-aca2903eefd0f8a3ba672f985182f899b425ca24.tar.gz lwn-aca2903eefd0f8a3ba672f985182f899b425ca24.zip | |
new step_into() flag: WALK_NOFOLLOW
Tells step_into() not to follow symlinks, regardless of LOOKUP_FOLLOW.
Allows to switch handle_lookup_down() to of step_into(), getting
all follow_managed() and step_into() calls paired.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/fs/namei.c b/fs/namei.c index 3097edcb4a1a..79f06be7f5d4 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1827,7 +1827,7 @@ static int pick_link(struct nameidata *nd, struct path *link, return 1; } -enum {WALK_FOLLOW = 1, WALK_MORE = 2}; +enum {WALK_FOLLOW = 1, WALK_MORE = 2, WALK_NOFOLLOW = 4}; /* * Do we need to follow links? We _really_ want to be able @@ -1839,7 +1839,8 @@ static inline int step_into(struct nameidata *nd, struct path *path, int flags, struct inode *inode, unsigned seq) { if (likely(!d_is_symlink(path->dentry)) || - !(flags & WALK_FOLLOW || nd->flags & LOOKUP_FOLLOW)) { + !((flags & WALK_FOLLOW) || (nd->flags & LOOKUP_FOLLOW)) || + (flags & WALK_NOFOLLOW)) { /* not a symlink or should not follow */ path_to_nameidata(path, nd); nd->inode = inode; @@ -2363,10 +2364,7 @@ static int handle_lookup_down(struct nameidata *nd) err = handle_mounts(nd, nd->path.dentry, &path, &inode, &seq); if (unlikely(err < 0)) return err; - path_to_nameidata(&path, nd); - nd->inode = inode; - nd->seq = seq; - return 0; + return step_into(nd, &path, WALK_NOFOLLOW, inode, seq); } /* Returns 0 and nd will be valid on success; Retuns error, otherwise. */ |