#include <linux/in6.h>
#include <net/ipv6.h>
#include <linux/nfs_xdr.h>
+#include <linux/sunrpc/bc_xprt.h>
#include <asm/system.h>
size_t addrlen;
const struct nfs_rpc_ops *rpc_ops;
int proto;
+ u32 minorversion;
};
/*
{
struct nfs_client *clp;
struct rpc_cred *cred;
+ int err = -ENOMEM;
if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
goto error_0;
clp->rpc_ops = cl_init->rpc_ops;
- if (cl_init->rpc_ops->version == 4) {
- if (nfs_callback_up() < 0)
- goto error_2;
- __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
- }
-
atomic_set(&clp->cl_count, 1);
clp->cl_cons_state = NFS_CS_INITING;
clp->cl_addrlen = cl_init->addrlen;
if (cl_init->hostname) {
+ err = -ENOMEM;
clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
if (!clp->cl_hostname)
- goto error_3;
+ goto error_cleanup;
}
INIT_LIST_HEAD(&clp->cl_superblocks);
rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
clp->cl_boot_time = CURRENT_TIME;
clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
+ clp->cl_minorversion = cl_init->minorversion;
#endif
cred = rpc_lookup_machine_cred();
if (!IS_ERR(cred))
return clp;
-error_3:
- if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
- nfs_callback_down();
-error_2:
+error_cleanup:
kfree(clp);
error_0:
- return NULL;
+ return ERR_PTR(err);
}
static void nfs4_shutdown_client(struct nfs_client *clp)
}
/*
+ * Destroy the NFS4 callback service
+ */
+static void nfs4_destroy_callback(struct nfs_client *clp)
+{
+#ifdef CONFIG_NFS_V4
+ if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
+ nfs_callback_down(clp->cl_minorversion);
+#endif /* CONFIG_NFS_V4 */
+}
+
+/*
+ * Clears/puts all minor version specific parts from an nfs_client struct
+ * reverting it to minorversion 0.
+ */
+static void nfs4_clear_client_minor_version(struct nfs_client *clp)
+{
+#ifdef CONFIG_NFS_V4_1
+ if (nfs4_has_session(clp)) {
+ nfs4_destroy_session(clp->cl_session);
+ clp->cl_session = NULL;
+ }
+
+ clp->cl_call_sync = _nfs4_call_sync;
+#endif /* CONFIG_NFS_V4_1 */
+
+ nfs4_destroy_callback(clp);
+}
+
+/*
* Destroy a shared client record
*/
static void nfs_free_client(struct nfs_client *clp)
{
dprintk("--> nfs_free_client(%u)\n", clp->rpc_ops->version);
+ nfs4_clear_client_minor_version(clp);
nfs4_shutdown_client(clp);
nfs_fscache_release_client_cookie(clp);
if (!IS_ERR(clp->cl_rpcclient))
rpc_shutdown_client(clp->cl_rpcclient);
- if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state))
- nfs_callback_down();
-
if (clp->cl_machine_cred != NULL)
put_rpccred(clp->cl_machine_cred);
struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
/* Don't match clients that failed to initialise properly */
- if (clp->cl_cons_state != NFS_CS_READY)
+ if (!(clp->cl_cons_state == NFS_CS_READY ||
+ clp->cl_cons_state == NFS_CS_SESSION_INITING))
continue;
/* Different NFS versions cannot share the same nfs_client */
if (clp->cl_proto != data->proto)
continue;
-
+ /* Match nfsv4 minorversion */
+ if (clp->cl_minorversion != data->minorversion)
+ continue;
/* Match the full socket address */
if (!nfs_sockaddr_cmp(sap, clap))
continue;
spin_unlock(&nfs_client_lock);
new = nfs_alloc_client(cl_init);
- } while (new);
+ } while (!IS_ERR(new));
- return ERR_PTR(-ENOMEM);
+ dprintk("--> nfs_get_client() = %ld [failed]\n", PTR_ERR(new));
+ return new;
/* install a new client and return with it unready */
install_client:
nfs_free_client(new);
error = wait_event_killable(nfs_client_active_wq,
- clp->cl_cons_state != NFS_CS_INITING);
+ clp->cl_cons_state < NFS_CS_INITING);
if (error < 0) {
nfs_put_client(clp);
return ERR_PTR(-ERESTARTSYS);
/*
* Mark a server as ready or failed
*/
-static void nfs_mark_client_ready(struct nfs_client *clp, int state)
+void nfs_mark_client_ready(struct nfs_client *clp, int state)
{
clp->cl_cons_state = state;
wake_up_all(&nfs_client_active_wq);
}
/*
+ * With sessions, the client is not marked ready until after a
+ * successful EXCHANGE_ID and CREATE_SESSION.
+ *
+ * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
+ * other versions of NFS can be tried.
+ */
+int nfs4_check_client_ready(struct nfs_client *clp)
+{
+ if (!nfs4_has_session(clp))
+ return 0;
+ if (clp->cl_cons_state < NFS_CS_READY)
+ return -EPROTONOSUPPORT;
+ return 0;
+}
+
+/*
* Initialise the timeout values for a connection
*/
static void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
.hostname = clp->cl_hostname,
.address = (struct sockaddr *)&clp->cl_addr,
.addrlen = clp->cl_addrlen,
- .protocol = server->flags & NFS_MOUNT_TCP ?
- IPPROTO_TCP : IPPROTO_UDP,
.nfs_version = clp->rpc_ops->version,
.noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
1 : 0,
if (server->flags & NFS_MOUNT_NONLM)
return 0;
+ switch (clp->cl_proto) {
+ default:
+ nlm_init.protocol = IPPROTO_TCP;
+ break;
+ case XPRT_TRANSPORT_UDP:
+ nlm_init.protocol = IPPROTO_UDP;
+ }
+
host = nlmclnt_init(&nlm_init);
if (IS_ERR(host))
return PTR_ERR(host);
dprintk("--> nfs_init_server()\n");
#ifdef CONFIG_NFS_V3
- if (data->flags & NFS_MOUNT_VER3)
+ if (data->version == 3)
cl_init.rpc_ops = &nfs_v3_clientops;
#endif
/* Initialise the client representation from the mount data */
server->flags = data->flags;
server->options = data->options;
+ server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
+ NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
+ NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
if (data->rsize)
server->rsize = nfs_block_size(data->rsize, NULL);
server->rsize = NFS_MAX_FILE_IO_SIZE;
server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ server->backing_dev_info.name = "nfs";
server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
if (server->wsize > max_rpc_payload)
goto out_error;
nfs_server_set_fsinfo(server, &fsinfo);
- error = bdi_init(&server->backing_dev_info);
- if (error)
- goto out_error;
-
/* Get some general file system info */
if (server->namelen == 0) {
target->acdirmin = source->acdirmin;
target->acdirmax = source->acdirmax;
target->caps = source->caps;
+ target->options = source->options;
}
/*
return NULL;
}
+ if (bdi_init(&server->backing_dev_info)) {
+ nfs_free_iostats(server->io_stats);
+ kfree(server);
+ return NULL;
+ }
+
return server;
}
(unsigned long long) server->fsid.major,
(unsigned long long) server->fsid.minor);
- BUG_ON(!server->nfs_client);
- BUG_ON(!server->nfs_client->rpc_ops);
- BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
-
spin_lock(&nfs_client_lock);
list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
list_add_tail(&server->master_link, &nfs_volume_list);
#ifdef CONFIG_NFS_V4
/*
+ * Initialize the NFS4 callback service
+ */
+static int nfs4_init_callback(struct nfs_client *clp)
+{
+ int error;
+
+ if (clp->rpc_ops->version == 4) {
+ if (nfs4_has_session(clp)) {
+ error = xprt_setup_backchannel(
+ clp->cl_rpcclient->cl_xprt,
+ NFS41_BC_MIN_CALLBACKS);
+ if (error < 0)
+ return error;
+ }
+
+ error = nfs_callback_up(clp->cl_minorversion,
+ clp->cl_rpcclient->cl_xprt);
+ if (error < 0) {
+ dprintk("%s: failed to start callback. Error = %d\n",
+ __func__, error);
+ return error;
+ }
+ __set_bit(NFS_CS_CALLBACK, &clp->cl_res_state);
+ }
+ return 0;
+}
+
+/*
+ * Initialize the minor version specific parts of an NFS4 client record
+ */
+static int nfs4_init_client_minor_version(struct nfs_client *clp)
+{
+ clp->cl_call_sync = _nfs4_call_sync;
+
+#if defined(CONFIG_NFS_V4_1)
+ if (clp->cl_minorversion) {
+ struct nfs4_session *session = NULL;
+ /*
+ * Create the session and mark it expired.
+ * When a SEQUENCE operation encounters the expired session
+ * it will do session recovery to initialize it.
+ */
+ session = nfs4_alloc_session(clp);
+ if (!session)
+ return -ENOMEM;
+
+ clp->cl_session = session;
+ clp->cl_call_sync = _nfs4_call_sync_session;
+ }
+#endif /* CONFIG_NFS_V4_1 */
+
+ return nfs4_init_callback(clp);
+}
+
+/*
* Initialise an NFS4 client record
*/
static int nfs4_init_client(struct nfs_client *clp,
1, flags & NFS_MOUNT_NORESVPORT);
if (error < 0)
goto error;
- memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
+ strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
error = nfs_idmap_new(clp);
if (error < 0) {
}
__set_bit(NFS_CS_IDMAP, &clp->cl_res_state);
- nfs_mark_client_ready(clp, NFS_CS_READY);
+ error = nfs4_init_client_minor_version(clp);
+ if (error < 0)
+ goto error;
+
+ if (!nfs4_has_session(clp))
+ nfs_mark_client_ready(clp, NFS_CS_READY);
return 0;
error:
.addrlen = addrlen,
.rpc_ops = &nfs_v4_clientops,
.proto = proto,
+ .minorversion = minorversion,
};
struct nfs_client *clp;
int error;
return error;
}
+
+/*
+ * Session has been established, and the client marked ready.
+ * Set the mount rsize and wsize with negotiated fore channel
+ * attributes which will be bound checked in nfs_server_set_fsinfo.
+ */
+static void nfs4_session_set_rwsize(struct nfs_server *server)
+{
+#ifdef CONFIG_NFS_V4_1
+ struct nfs4_session *sess;
+ u32 server_resp_sz;
+ u32 server_rqst_sz;
+
+ if (!nfs4_has_session(server->nfs_client))
+ return;
+ sess = server->nfs_client->cl_session;
+ server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead;
+ server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead;
+
+ if (server->rsize > server_resp_sz)
+ server->rsize = server_resp_sz;
+ if (server->wsize > server_rqst_sz)
+ server->wsize = server_rqst_sz;
+#endif /* CONFIG_NFS_V4_1 */
+}
+
/*
* Create a version 4 volume record
*/
/* Initialise the client representation from the mount data */
server->flags = data->flags;
- server->caps |= NFS_CAP_ATOMIC_OPEN;
+ server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
server->options = data->options;
/* Get a client record */
BUG_ON(!server->nfs_client->rpc_ops);
BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
+ error = nfs4_init_session(server);
+ if (error < 0)
+ goto error;
+
/* Probe the root fh to retrieve its FSID */
error = nfs4_path_walk(server, mntfh, data->nfs_server.export_path);
if (error < 0)
(unsigned long long) server->fsid.minor);
dprintk("Mount FH: %d\n", mntfh->size);
+ nfs4_session_set_rwsize(server);
+
error = nfs_probe_fsinfo(server, mntfh, &fattr);
if (error < 0)
goto error;
if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
server->namelen = NFS4_MAXNAMLEN;
- BUG_ON(!server->nfs_client);
- BUG_ON(!server->nfs_client->rpc_ops);
- BUG_ON(!server->nfs_client->rpc_ops->file_inode_ops);
-
spin_lock(&nfs_client_lock);
list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks);
list_add_tail(&server->master_link, &nfs_volume_list);
/* Initialise the client representation from the parent server */
nfs_server_copy_userdata(server, parent_server);
- server->caps |= NFS_CAP_ATOMIC_OPEN;
+ server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR;
/* Get a client representation.
* Note: NFSv4 always uses TCP, */
static void nfs_server_list_stop(struct seq_file *p, void *v);
static int nfs_server_list_show(struct seq_file *m, void *v);
-static struct seq_operations nfs_server_list_ops = {
+static const struct seq_operations nfs_server_list_ops = {
.start = nfs_server_list_start,
.next = nfs_server_list_next,
.stop = nfs_server_list_stop,
static void nfs_volume_list_stop(struct seq_file *p, void *v);
static int nfs_volume_list_show(struct seq_file *m, void *v);
-static struct seq_operations nfs_volume_list_ops = {
+static const struct seq_operations nfs_volume_list_ops = {
.start = nfs_volume_list_start,
.next = nfs_volume_list_next,
.stop = nfs_volume_list_stop,
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