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namei: simpler treatment of symlinks with nothing other that / in the body 

Instead of saving name and branching to OK:, where we'll immediately restore
it, and call walk_component() with WALK_PUT|WALK_GET and nd->last_type being
LAST_BIND, which is equivalent to put_link(nd), err = 0, we can just treat
that the same way we'd treat procfs-style "jump" symlinks - do put_link(nd)
and move on.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-05-10 10:50:41 -04:00
parent 6920a4405e
commit 4f697a5e17
1 changed files with 7 additions and 5 deletions
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12
fs/namei.c
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@ -1865,11 +1865,13 @@ static int link_path_walk(const char *name, struct nameidata *nd)
;
}
nd->inode = nd->path.dentry->d_inode;
nd->stack[nd->depth - 1].name = name;
if (!*s)
goto OK;
name = s;
continue;
if (unlikely(!*s)) {
put_link(nd);
} else {
nd->stack[nd->depth - 1].name = name;
name = s;
continue;
}
}
}
if (!d_can_lookup(nd->path.dentry)) {