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| author | Al Viro <viro@zeniv.linux.org.uk> | 2011-02-21 21:34:47 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-03-14 09:15:23 -0400 |
| commit | 52094c8a0610cf57920ad4c6c57470ae2ccbbd25 (patch) | |
| tree | 1601d55c395248a429eb1c0fddc1c23094694024 /fs/namei.c | |
| parent | c9c6cac0c2bdbda42e7b804838648d0bc60ddb13 (diff) | |
| download | lwn-52094c8a0610cf57920ad4c6c57470ae2ccbbd25.tar.gz lwn-52094c8a0610cf57920ad4c6c57470ae2ccbbd25.zip | |
take RCU-dependent stuff around exec_permission() into a new helper
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/fs/namei.c b/fs/namei.c index 1d6bc8151553..8c704465f6ce 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1322,6 +1322,18 @@ fail: return PTR_ERR(dentry); } +static inline int may_lookup(struct nameidata *nd) +{ + if (nd->flags & LOOKUP_RCU) { + int err = exec_permission(nd->inode, IPERM_FLAG_RCU); + if (err != -ECHILD) + return err; + if (nameidata_drop_rcu(nd)) + return -ECHILD; + } + return exec_permission(nd->inode, 0); +} + /* * Name resolution. * This is the basic name resolution function, turning a pathname into @@ -1352,17 +1364,8 @@ static int link_path_walk(const char *name, struct nameidata *nd) unsigned int c; nd->flags |= LOOKUP_CONTINUE; - if (nd->flags & LOOKUP_RCU) { - err = exec_permission(nd->inode, IPERM_FLAG_RCU); - if (err == -ECHILD) { - if (nameidata_drop_rcu(nd)) - return -ECHILD; - goto exec_again; - } - } else { -exec_again: - err = exec_permission(nd->inode, 0); - } + + err = may_lookup(nd); if (err) break; |