diff options
| author | Al Viro | 2020-01-14 13:07:57 -0500 |
|---|---|---|
| committer | Al Viro | 2020-03-13 21:08:18 -0400 |
| commit | 40fcf5a931af901198fcfb23a50354e54e1fa7a6 (patch) | |
| tree | a063857b5ab2c4d4c4e3ba38a7c8eb328f663196 /fs/namei.c | |
| parent | 1ccac622f9da58a113f9c5b8c9d07d76b60bc555 (diff) | |
merging pick_link() with get_link(), part 3
After a pure jump ("/" or procfs-style symlink) we don't need to
hold the link anymore. link_path_walk() dropped it if such case
had been detected, lookup_last/do_last() (i.e. old trailing_symlink())
left it on the stack - it ended up calling terminate_walk() shortly
anyway, which would've purged the entire stack.
Do it in get_link() itself instead. Simpler logics that way...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/fs/namei.c b/fs/namei.c index 9678bb2179e6..f844378ce908 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1154,7 +1154,9 @@ const char *get_link(struct nameidata *nd) } else { res = get(dentry, inode, &last->done); } - if (IS_ERR_OR_NULL(res)) + if (!res) + goto all_done; + if (IS_ERR(res)) return res; } if (*res == '/') { @@ -1164,9 +1166,11 @@ const char *get_link(struct nameidata *nd) while (unlikely(*++res == '/')) ; } - if (!*res) - res = NULL; - return res; + if (*res) + return res; +all_done: // pure jump + put_link(nd); + return NULL; } /* @@ -2211,11 +2215,7 @@ OK: if (IS_ERR(s)) return PTR_ERR(s); - err = 0; - if (unlikely(!s)) { - /* jumped */ - put_link(nd); - } else { + if (likely(s)) { nd->stack[nd->depth - 1].name = name; name = s; continue; |