On Tue, Aug 12, 2008 at 04:24:09PM +1000, Stephen Rothwell wrote:
> For now, I have reverted the ubifs commit. Christoph, maybe you could
> provide a better solution.
Artem, could you _please_ send ubifs patches to fsdevel for review
before putting them into -next? Even more so for nfs exporting stuff
as it needs quite a bit of review.
> @@ -149,7 +150,7 @@ struct inode *ubifs_iget(struct super_block *sb, unsigned long inum)
> if (err)
> goto out_invalid;
>
> - /* Disable readahead */
> + /* Disable read-ahead */
> inode->i_mapping->backing_dev_info = &c->bdi;
>
> switch (inode->i_mode & S_IFMT) {
> @@ -345,7 +346,7 @@ static void ubifs_delete_inode(struct inode *inode)
> if (err)
> /*
> * Worst case we have a lost orphan inode wasting space, so a
> - * simple error message is ok here.
> + * simple error message is OK here.
> */
What are these comment changes doing in a patch adding export ops?
> + switch (fh_type) {
> + case FILEID_INO32_GEN:
> + case FILEID_INO32_GEN_PARENT:
> + inum = fid->i32.ino;
> + break;
> + default:
> + dbg_err("unsupported file handle type %d", fh_type);
> + return ERR_PTR(-EINVAL);
> + }
> +
> + inode = ubifs_iget(sb, inum);
> + if (IS_ERR(inode)) {
> + if (PTR_ERR(inode) == -ENOENT)
> + return ERR_PTR(-ESTALE);
> + return ERR_CAST(inode);
> + }
> +
> + dent = d_alloc_anon(inode);
> + if (!dent) {
> + iput(inode);
> + return ERR_PTR(-ENOMEM);
> + }
> + return dent;
I think you'd be better off using generic_fh_to_dentry/parent and
igoring the generation argument of the get_inode callback. That way
the code is much smaller, and you're isolated from changes like the
d_alloc_anon to d_obtain_alias one.
> +/*
> + * Probably NFS support could be faster if other export operations were
> + * implemented, but '->fh_to_dentry()' is enough.
> + */
> +static struct export_operations ubifs_export_ops = {
> + .fh_to_dentry = ubifs_fh_to_dentry,
> +};
No, it's not. It seems to work with default options and when you don't
reboot the server. You need a fh_to_parent and get_parent method, too.
> + .fs_flags = FS_REQUIRES_DEV,
This one is wrong.
Do you have a patch in the tree somewhere to fix readdir for nfs?
Without that adding the export ops is a very bad idea.
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