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vfs: do_last(): clean up retry 

Move the lookup retry logic to the bottom of the function to make the normal
case simpler to read.

Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Miklos Szeredi 2012-06-05 15:10:31 +02:00 committed by Al Viro
parent 77d660a8a8
commit f60dc3db6e
1 changed files with 21 additions and 15 deletions
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36
fs/namei.c
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@ -2614,22 +2614,11 @@ finish_open_created:
goto exit;
od->mnt = nd->path.mnt;
filp = finish_open(od, nd->path.dentry, NULL);
if (filp == ERR_PTR(-EOPENSTALE) && save_parent.dentry && !retried) {
BUG_ON(save_parent.dentry != dir);
path_put(&nd->path);
nd->path = save_parent;
nd->inode = dir->d_inode;
save_parent.mnt = NULL;
save_parent.dentry = NULL;
if (want_write) {
mnt_drop_write(nd->path.mnt);
want_write = false;
}
retried = true;
goto retry_lookup;
}
if (IS_ERR(filp))
if (IS_ERR(filp)) {
if (filp == ERR_PTR(-EOPENSTALE))
goto stale_open;
goto out;
}
error = open_check_o_direct(filp);
if (error)
goto exit_fput;
@ -2659,6 +2648,23 @@ exit_fput:
fput(filp);
goto exit;
stale_open:
/* If no saved parent or already retried then can't retry */
if (!save_parent.dentry || retried)
goto out;
BUG_ON(save_parent.dentry != dir);
path_put(&nd->path);
nd->path = save_parent;
nd->inode = dir->d_inode;
save_parent.mnt = NULL;
save_parent.dentry = NULL;
if (want_write) {
mnt_drop_write(nd->path.mnt);
want_write = false;
}
retried = true;
goto retry_lookup;
}
static struct file *path_openat(int dfd, const char *pathname,