diff options
| author |   Al Viro <viro@zeniv.linux.org.uk> | 2016-11-14 01:39:36 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-12-05 19:11:57 -0500 |
| commit | 1c4ff1a87e46a06fc00a83da2fbbc3ac0298f221 (patch) | |
| tree | 66a914e6069ea2cf99906e85879e6c178d3eef74 /fs/namei.c | |
| parent | namei: shift interpretation of LOOKUP_FOLLOW inside should_follow_link() (diff) | |
| download | wireguard-linux-1c4ff1a87e46a06fc00a83da2fbbc3ac0298f221.tar.xz wireguard-linux-1c4ff1a87e46a06fc00a83da2fbbc3ac0298f221.zip | |
namei: invert WALK_PUT logics
... turning the condition for put_link() in walk_component() into
"WALK_MORE not passed and depth is non-zero". Again, makes for
simpler arguments.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/namei.c b/fs/namei.c index 379168db782b..57d60922396e 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1747,7 +1747,7 @@ static inline int should_follow_link(struct nameidata *nd, struct path *link, return pick_link(nd, link, inode, seq); } -enum {WALK_GET = 1, WALK_PUT = 2}; +enum {WALK_GET = 1, WALK_MORE = 2}; static int walk_component(struct nameidata *nd, int flags) { @@ -1762,7 +1762,7 @@ static int walk_component(struct nameidata *nd, int flags) */ if (unlikely(nd->last_type != LAST_NORM)) { err = handle_dots(nd, nd->last_type); - if (flags & WALK_PUT) + if (!(flags & WALK_MORE) && nd->depth) put_link(nd); return err; } @@ -1789,7 +1789,7 @@ static int walk_component(struct nameidata *nd, int flags) inode = d_backing_inode(path.dentry); } - if (flags & WALK_PUT) + if (!(flags & WALK_MORE) && nd->depth) put_link(nd); err = should_follow_link(nd, &path, flags & WALK_GET, inode, seq); if (unlikely(err)) @@ -2104,9 +2104,10 @@ OK: if (!name) return 0; /* last component of nested symlink */ - err = walk_component(nd, WALK_GET | WALK_PUT); - } else { err = walk_component(nd, WALK_GET); + } else { + /* not the last component */ + err = walk_component(nd, WALK_GET | WALK_MORE); } if (err < 0) return err; @@ -2248,7 +2249,7 @@ static inline int lookup_last(struct nameidata *nd) nd->flags |= LOOKUP_FOLLOW | LOOKUP_DIRECTORY; nd->flags &= ~LOOKUP_PARENT; - return walk_component(nd, nd->depth ? WALK_PUT : 0); + return walk_component(nd, 0); } /* Returns 0 and nd will be valid on success; Retuns error, otherwise. */ |