NFSv4: Don't free the nfs4_lock_state until after the release_lockowner
Otherwise we can end up with sequence id problems if the client reuses
the owner_id before the server has processed the release_lockowner
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 16373df..026878c 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -213,7 +213,7 @@
extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
struct nfs4_fs_locations *fs_locations, struct page *page);
-extern void nfs4_release_lockowner(const struct nfs4_lock_state *);
+extern int nfs4_release_lockowner(struct nfs4_lock_state *);
extern const struct xattr_handler *nfs4_xattr_handlers[];
#if defined(CONFIG_NFS_V4_1)
@@ -338,6 +338,8 @@
extern void nfs_release_seqid(struct nfs_seqid *seqid);
extern void nfs_free_seqid(struct nfs_seqid *seqid);
+extern void nfs4_free_lock_state(struct nfs4_lock_state *lsp);
+
extern const nfs4_stateid zero_stateid;
/* nfs4xdr.c */
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1ec0522..32e0d08 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4745,8 +4745,15 @@
return err;
}
+struct nfs_release_lockowner_data {
+ struct nfs4_lock_state *lsp;
+ struct nfs_release_lockowner_args args;
+};
+
static void nfs4_release_lockowner_release(void *calldata)
{
+ struct nfs_release_lockowner_data *data = calldata;
+ nfs4_free_lock_state(data->lsp);
kfree(calldata);
}
@@ -4754,24 +4761,26 @@
.rpc_release = nfs4_release_lockowner_release,
};
-void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
+int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
{
struct nfs_server *server = lsp->ls_state->owner->so_server;
- struct nfs_release_lockowner_args *args;
+ struct nfs_release_lockowner_data *data;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
};
if (server->nfs_client->cl_mvops->minor_version != 0)
- return;
- args = kmalloc(sizeof(*args), GFP_NOFS);
- if (!args)
- return;
- args->lock_owner.clientid = server->nfs_client->cl_clientid;
- args->lock_owner.id = lsp->ls_seqid.owner_id;
- args->lock_owner.s_dev = server->s_dev;
- msg.rpc_argp = args;
- rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
+ return -EINVAL;
+ data = kmalloc(sizeof(*data), GFP_NOFS);
+ if (!data)
+ return -ENOMEM;
+ data->lsp = lsp;
+ data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
+ data->args.lock_owner.id = lsp->ls_seqid.owner_id;
+ data->args.lock_owner.s_dev = server->s_dev;
+ msg.rpc_argp = &data->args;
+ rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
+ return 0;
}
#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index a58d02a..7adc46b 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -784,7 +784,7 @@
return NULL;
}
-static void nfs4_free_lock_state(struct nfs4_lock_state *lsp)
+void nfs4_free_lock_state(struct nfs4_lock_state *lsp)
{
struct nfs_server *server = lsp->ls_state->owner->so_server;
@@ -842,8 +842,10 @@
if (list_empty(&state->lock_states))
clear_bit(LK_STATE_IN_USE, &state->flags);
spin_unlock(&state->state_lock);
- if (lsp->ls_flags & NFS_LOCK_INITIALIZED)
- nfs4_release_lockowner(lsp);
+ if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
+ if (nfs4_release_lockowner(lsp) == 0)
+ return;
+ }
nfs4_free_lock_state(lsp);
}