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NFS: Use nfs_fs_mount_common() for remote referral mounts

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Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker 2012-05-10 15:07:37 -04:00 committed by Trond Myklebust
parent 3d176e3fe4
commit 21e4b82e13
1 changed files with 14 additions and 77 deletions
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91
fs/nfs/super.c
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@ -2920,95 +2920,32 @@ static struct dentry *
nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *raw_data)
{
struct nfs_clone_mount *data = raw_data;
struct super_block *s;
struct nfs_server *server;
struct dentry *mntroot;
struct nfs_fh *mntfh;
int (*compare_super)(struct super_block *, void *) = nfs_compare_super;
struct nfs_sb_mountdata sb_mntdata = {
.mntflags = flags,
struct nfs_mount_info mount_info = {
.fill_super = nfs4_fill_super,
.set_security = nfs_clone_sb_security,
.cloned = raw_data,
};
int error = -ENOMEM;
struct nfs_server *server;
struct dentry *mntroot = ERR_PTR(-ENOMEM);
struct nfs_fh *mntfh;
dprintk("--> nfs4_referral_get_sb()\n");
mntfh = nfs_alloc_fhandle();
if (mntfh == NULL)
goto out_err_nofh;
if (mount_info.cloned == NULL || mntfh == NULL)
goto out;
/* create a new volume representation */
server = nfs4_create_referral_server(data, mntfh);
server = nfs4_create_referral_server(mount_info.cloned, mntfh);
if (IS_ERR(server)) {
error = PTR_ERR(server);
goto out_err_noserver;
}
sb_mntdata.server = server;
if (server->flags & NFS_MOUNT_UNSHARED)
compare_super = NULL;
/* -o noac implies -o sync */
if (server->flags & NFS_MOUNT_NOAC)
sb_mntdata.mntflags |= MS_SYNCHRONOUS;
/* Get a superblock - note that we may end up sharing one that already exists */
s = sget(&nfs4_fs_type, compare_super, nfs_set_super, &sb_mntdata);
if (IS_ERR(s)) {
error = PTR_ERR(s);
goto out_err_nosb;
mntroot = ERR_CAST(server);
goto out;
}
if (s->s_fs_info != server) {
nfs_free_server(server);
server = NULL;
} else {
error = nfs_bdi_register(server);
if (error)
goto error_splat_bdi;
}
if (!s->s_root) {
/* initial superblock/root creation */
nfs4_fill_super(s, NULL);
nfs_get_cache_cookie(s, NULL, data);
}
mntroot = nfs_get_root(s, mntfh, dev_name);
if (IS_ERR(mntroot)) {
error = PTR_ERR(mntroot);
goto error_splat_super;
}
if (mntroot->d_inode->i_op != NFS_SB(s)->nfs_client->rpc_ops->dir_inode_ops) {
dput(mntroot);
error = -ESTALE;
goto error_splat_super;
}
s->s_flags |= MS_ACTIVE;
security_sb_clone_mnt_opts(data->sb, s);
mntroot = nfs_fs_mount_common(&nfs4_fs_type, server, flags, dev_name, mntfh, &mount_info);
out:
nfs_free_fhandle(mntfh);
dprintk("<-- nfs4_referral_get_sb() = 0\n");
return mntroot;
out_err_nosb:
nfs_free_server(server);
out_err_noserver:
nfs_free_fhandle(mntfh);
out_err_nofh:
dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error);
return ERR_PTR(error);
error_splat_super:
if (server && !s->s_root)
bdi_unregister(&server->backing_dev_info);
error_splat_bdi:
deactivate_locked_super(s);
nfs_free_fhandle(mntfh);
dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error);
return ERR_PTR(error);
}
/*