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| author | Al Viro <viro@zeniv.linux.org.uk> | 2020-03-05 23:48:44 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-03-14 04:09:12 +0300 |
| commit | c108837e06b659fd1dd144c415a25b7ac339926b (patch) | |
| tree | c91e2cf49708d415ece30236bdb7d7c6dba06b97 /fs/namei.c | |
| parent | d8d4611a4f2dd6be8fe3ddb5cf8eea7f1dfe0787 (diff) | |
| download | linux-c108837e06b659fd1dd144c415a25b7ac339926b.tar.xz | |
namei: have link_path_walk() maintain LOOKUP_PARENT
set on entry, clear when we get to the last component.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/fs/namei.c b/fs/namei.c index 04c1d798013f..b45ec86dc7b3 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2124,6 +2124,7 @@ static int link_path_walk(const char *name, struct nameidata *nd) int err; nd->last_type = LAST_ROOT; + nd->flags |= LOOKUP_PARENT; if (IS_ERR(name)) return PTR_ERR(name); while (*name=='/') @@ -2184,8 +2185,10 @@ static int link_path_walk(const char *name, struct nameidata *nd) if (unlikely(!*name)) { OK: /* pathname or trailing symlink, done */ - if (!depth) + if (!depth) { + nd->flags &= ~LOOKUP_PARENT; return 0; + } /* last component of nested symlink */ name = nd->stack[--depth].name; link = walk_component(nd, 0); @@ -2222,7 +2225,7 @@ static const char *path_init(struct nameidata *nd, unsigned flags) if (flags & LOOKUP_RCU) rcu_read_lock(); - nd->flags = flags | LOOKUP_JUMPED | LOOKUP_PARENT; + nd->flags = flags | LOOKUP_JUMPED; nd->depth = 0; nd->m_seq = __read_seqcount_begin(&mount_lock.seqcount); @@ -2314,16 +2317,10 @@ static const char *path_init(struct nameidata *nd, unsigned flags) static inline const char *lookup_last(struct nameidata *nd) { - const char *link; if (nd->last_type == LAST_NORM && nd->last.name[nd->last.len]) nd->flags |= LOOKUP_FOLLOW | LOOKUP_DIRECTORY; - nd->flags &= ~LOOKUP_PARENT; - link = walk_component(nd, WALK_TRAILING); - if (link) { - nd->flags |= LOOKUP_PARENT; - } - return link; + return walk_component(nd, WALK_TRAILING); } static int handle_lookup_down(struct nameidata *nd) @@ -3174,7 +3171,6 @@ static const char *do_last(struct nameidata *nd, const char *res; int error; - nd->flags &= ~LOOKUP_PARENT; nd->flags |= op->intent; if (nd->last_type != LAST_NORM) { @@ -3275,7 +3271,6 @@ finish_lookup: put_link(nd); res = step_into(nd, WALK_TRAILING, dentry, inode, seq); if (unlikely(res)) { - nd->flags |= LOOKUP_PARENT; nd->flags &= ~(LOOKUP_OPEN|LOOKUP_CREATE|LOOKUP_EXCL); return res; } |