On Tue, Jun 14, 2011 at 1:59 AM, Aneesh Kumar K.V
<aneesh.kumar@xxxxxxxxxxxxxxxxxx> wrote:
> On Mon, 13 Jun 2011 16:12:52 -0500, Eric Van Hensbergen <ericvh@xxxxxxxxx> wrote:
>> Could be wrong, but a quick regression check of your patches fails
>> against a legacy server. Are you making sure the new operations are
>> properly protected by a .L flag?
>
> How about below diff
>
> [3.0-pending@v9fs]$ git diff
> diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
> index f40fdc3..436699e 100644
> --- a/fs/9p/vfs_inode.c
> +++ b/fs/9p/vfs_inode.c
> @@ -499,13 +499,15 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
>
> static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
> {
> - int retval;
> struct inode *inode;
> + int retval = -EOPNOTSUPP;
> struct p9_fid *v9fid, *dfid;
> + struct v9fs_session_info *v9ses;
>
> P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n",
> dir, dentry, flags);
>
> + v9ses = v9fs_inode2v9ses(dir);
> inode = dentry->d_inode;
> dfid = v9fs_fid_lookup(dentry->d_parent);
> if (IS_ERR(dfid)) {
> @@ -513,7 +515,8 @@ static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
> P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
> return retval;
> }
> - retval = p9_client_unlinkat(dfid, dentry->d_name.name, flags);
> + if (v9fs_proto_dotl(v9ses))
> + retval = p9_client_unlinkat(dfid, dentry->d_name.name, flags);
> if (retval == -EOPNOTSUPP) {
> /* Try the one based on path */
> v9fid = v9fs_fid_clone(dentry);
>
Looks right.
>
> related to renameat i have updated to check for -EOPNOTSUPP instead of
> -ENOSYS. I am not sure any other dotl server out there is returning
> -ENOSYS. We haven't documented what the server should return in case it
> doesn't support any specific operation.
>
Yeah, the real tricky thing is I'm not sure what the other 9p servers
will send back since there are so many of them. I guess for dotl all
we need to do is look at diod and see what they are returning
(however, I'm sure they'll change if we want to make EOPNOTSUPP
standard).
-eric
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