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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-08-28 11:08:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-08 11:07:44 -0700 |
| commit | cb9179ead0aa0e3b7b4087cdba59baf16bbeef6d (patch) | |
| tree | 04d91abc90dc3f48d70bc95bc9bed6f561369008 /fs/namei.c | |
| parent | f1ac9f6bfea6f21e8ab6dbbe46879d62a6fba8c0 (diff) | |
| download | lwn-cb9179ead0aa0e3b7b4087cdba59baf16bbeef6d.tar.gz lwn-cb9179ead0aa0e3b7b4087cdba59baf16bbeef6d.zip | |
Simplify exec_permission_lite(), part 3
Don't call down to the generic inode_permission() function just to
call the inode-specific permission function - just do it directly.
The generic inode_permission() code does things like checking MAY_WRITE
and devcgroup_inode_permission(), neither of which are relevant for the
light pathname walk permission checks (we always do just MAY_EXEC, and
the inode is never a special device).
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/namei.c b/fs/namei.c index 929f535fb225..e645e3070360 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -434,8 +434,12 @@ static int exec_permission_lite(struct inode *inode) { umode_t mode = inode->i_mode; - if (inode->i_op->permission) - return inode_permission(inode, MAY_EXEC); + if (inode->i_op->permission) { + int ret = inode->i_op->permission(inode, MAY_EXEC); + if (!ret) + goto ok; + return ret; + } if (current_fsuid() == inode->i_uid) mode >>= 6; |