simpler calling conventions for filename_mountpoint()
a) make it accept ERR_PTR() as filename (and return its PTR_ERR() in that case)
b) make it putname() the sucker in the end otherwise
simplifies life for callers...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namei.c b/fs/namei.c
index 0bc7742..5ec3515 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2373,13 +2373,17 @@
filename_mountpoint(int dfd, struct filename *s, struct path *path,
unsigned int flags)
{
- int error = path_mountpoint(dfd, s->name, path, flags | LOOKUP_RCU);
+ int error;
+ if (IS_ERR(s))
+ return PTR_ERR(s);
+ error = path_mountpoint(dfd, s->name, path, flags | LOOKUP_RCU);
if (unlikely(error == -ECHILD))
error = path_mountpoint(dfd, s->name, path, flags);
if (unlikely(error == -ESTALE))
error = path_mountpoint(dfd, s->name, path, flags | LOOKUP_REVAL);
if (likely(!error))
audit_inode(s, path->dentry, 0);
+ putname(s);
return error;
}
@@ -2401,27 +2405,14 @@
user_path_mountpoint_at(int dfd, const char __user *name, unsigned int flags,
struct path *path)
{
- struct filename *s = getname(name);
- int error;
- if (IS_ERR(s))
- return PTR_ERR(s);
- error = filename_mountpoint(dfd, s, path, flags);
- putname(s);
- return error;
+ return filename_mountpoint(dfd, getname(name), path, flags);
}
int
kern_path_mountpoint(int dfd, const char *name, struct path *path,
unsigned int flags)
{
- struct filename *s = getname_kernel(name);
- int retval = PTR_ERR(s);
-
- if (!IS_ERR(s)) {
- retval = filename_mountpoint(dfd, s, path, flags);
- putname(s);
- }
- return retval;
+ return filename_mountpoint(dfd, getname_kernel(name), path, flags);
}
EXPORT_SYMBOL(kern_path_mountpoint);