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-rw-r--r--fs/cifs/cifsfs.h5
-rw-r--r--fs/cifs/cifssmb.c9
-rw-r--r--fs/cifs/connect.c13
-rw-r--r--fs/cifs/link.c1
-rw-r--r--fs/cifs/smb2ops.c2
-rw-r--r--fs/cifs/smb2pdu.c15
-rw-r--r--fs/cifs/smbdirect.c119
-rw-r--r--fs/cifs/smbdirect.h5
8 files changed, 130 insertions, 39 deletions
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index f047e8787..c1d5daa4b 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -121,7 +121,10 @@ extern const struct dentry_operations cifs_ci_dentry_ops;
#ifdef CONFIG_CIFS_DFS_UPCALL
extern struct vfsmount *cifs_dfs_d_automount(struct path *path);
#else
-#define cifs_dfs_d_automount NULL
+static inline struct vfsmount *cifs_dfs_d_automount(struct path *path)
+{
+ return ERR_PTR(-EREMOTE);
+}
#endif
/* Functions related to symlinks */
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index cb70f0c6a..d16fd8d1f 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -4895,8 +4895,13 @@ CIFSGetDFSRefer(const unsigned int xid, struct cifs_ses *ses,
return -ENODEV;
getDFSRetry:
- rc = smb_init(SMB_COM_TRANSACTION2, 15, ses->tcon_ipc, (void **) &pSMB,
- (void **) &pSMBr);
+ /*
+ * Use smb_init_no_reconnect() instead of smb_init() as
+ * CIFSGetDFSRefer() may be called from cifs_reconnect_tcon() and thus
+ * causing an infinite recursion.
+ */
+ rc = smb_init_no_reconnect(SMB_COM_TRANSACTION2, 15, ses->tcon_ipc,
+ (void **)&pSMB, (void **)&pSMBr);
if (rc)
return rc;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index b5aba1c89..37e91f27f 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -429,7 +429,8 @@ cifs_reconnect(struct TCP_Server_Info *server)
server->ssocket->state, server->ssocket->flags);
sock_release(server->ssocket);
server->ssocket = NULL;
- }
+ } else if (cifs_rdma_enabled(server))
+ smbd_destroy(server);
server->sequence_number = 0;
server->session_estab = false;
kfree(server->session_key.response);
@@ -799,10 +800,8 @@ static void clean_demultiplex_info(struct TCP_Server_Info *server)
wake_up_all(&server->request_q);
/* give those requests time to exit */
msleep(125);
- if (cifs_rdma_enabled(server) && server->smbd_conn) {
- smbd_destroy(server->smbd_conn);
- server->smbd_conn = NULL;
- }
+ if (cifs_rdma_enabled(server))
+ smbd_destroy(server);
if (server->ssocket) {
sock_release(server->ssocket);
server->ssocket = NULL;
@@ -2940,7 +2939,7 @@ cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
static struct cifs_ses *
cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
{
- int rc = -ENOMEM;
+ int rc = 0;
unsigned int xid;
struct cifs_ses *ses;
struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
@@ -2982,6 +2981,8 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
return ses;
}
+ rc = -ENOMEM;
+
cifs_dbg(FYI, "Existing smb sess not found\n");
ses = sesInfoAlloc();
if (ses == NULL)
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 5b1c33d92..f590149e2 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -481,6 +481,7 @@ smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
oparms.disposition = FILE_CREATE;
oparms.fid = &fid;
oparms.reconnect = false;
+ oparms.mode = 0644;
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
NULL);
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index f906984eb..118bcb351 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -475,7 +475,7 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
if (rc == -EOPNOTSUPP) {
cifs_dbg(FYI,
"server does not support query network interfaces\n");
- goto out;
+ ret_data_len = 0;
} else if (rc != 0) {
cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
goto out;
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 3485b9bf9..50c6405be 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3152,12 +3152,15 @@ smb2_readv_callback(struct mid_q_entry *mid)
(struct smb2_sync_hdr *)rdata->iov[0].iov_base;
unsigned int credits_received = 0;
struct smb_rqst rqst = { .rq_iov = &rdata->iov[1],
- .rq_nvec = 1,
- .rq_pages = rdata->pages,
- .rq_offset = rdata->page_offset,
- .rq_npages = rdata->nr_pages,
- .rq_pagesz = rdata->pagesz,
- .rq_tailsz = rdata->tailsz };
+ .rq_nvec = 1, };
+
+ if (rdata->got_bytes) {
+ rqst.rq_pages = rdata->pages;
+ rqst.rq_offset = rdata->page_offset;
+ rqst.rq_npages = rdata->nr_pages;
+ rqst.rq_pagesz = rdata->pagesz;
+ rqst.rq_tailsz = rdata->tailsz;
+ }
cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
__func__, mid->mid, mid->mid_state, rdata->result,
diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index 784628ec4..ea1d8cfab 100644
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -320,6 +320,9 @@ static int smbd_conn_upcall(
info->transport_status = SMBD_DISCONNECTED;
smbd_process_disconnected(info);
+ wake_up(&info->disconn_wait);
+ wake_up_interruptible(&info->wait_reassembly_queue);
+ wake_up_interruptible_all(&info->wait_send_queue);
break;
default:
@@ -1478,21 +1481,102 @@ static void idle_connection_timer(struct work_struct *work)
info->keep_alive_interval*HZ);
}
-/* Destroy this SMBD connection, called from upper layer */
-void smbd_destroy(struct smbd_connection *info)
+/*
+ * Destroy the transport and related RDMA and memory resources
+ * Need to go through all the pending counters and make sure on one is using
+ * the transport while it is destroyed
+ */
+void smbd_destroy(struct TCP_Server_Info *server)
{
+ struct smbd_connection *info = server->smbd_conn;
+ struct smbd_response *response;
+ unsigned long flags;
+
+ if (!info) {
+ log_rdma_event(INFO, "rdma session already destroyed\n");
+ return;
+ }
+
log_rdma_event(INFO, "destroying rdma session\n");
+ if (info->transport_status != SMBD_DISCONNECTED) {
+ rdma_disconnect(server->smbd_conn->id);
+ log_rdma_event(INFO, "wait for transport being disconnected\n");
+ wait_event(
+ info->disconn_wait,
+ info->transport_status == SMBD_DISCONNECTED);
+ }
- /* Kick off the disconnection process */
- smbd_disconnect_rdma_connection(info);
+ log_rdma_event(INFO, "destroying qp\n");
+ ib_drain_qp(info->id->qp);
+ rdma_destroy_qp(info->id);
+
+ log_rdma_event(INFO, "cancelling idle timer\n");
+ cancel_delayed_work_sync(&info->idle_timer_work);
+ log_rdma_event(INFO, "cancelling send immediate work\n");
+ cancel_delayed_work_sync(&info->send_immediate_work);
+
+ log_rdma_event(INFO, "wait for all send posted to IB to finish\n");
+ wait_event(info->wait_send_pending,
+ atomic_read(&info->send_pending) == 0);
+ wait_event(info->wait_send_payload_pending,
+ atomic_read(&info->send_payload_pending) == 0);
+
+ /* It's not posssible for upper layer to get to reassembly */
+ log_rdma_event(INFO, "drain the reassembly queue\n");
+ do {
+ spin_lock_irqsave(&info->reassembly_queue_lock, flags);
+ response = _get_first_reassembly(info);
+ if (response) {
+ list_del(&response->list);
+ spin_unlock_irqrestore(
+ &info->reassembly_queue_lock, flags);
+ put_receive_buffer(info, response);
+ } else
+ spin_unlock_irqrestore(
+ &info->reassembly_queue_lock, flags);
+ } while (response);
+ info->reassembly_data_length = 0;
+
+ log_rdma_event(INFO, "free receive buffers\n");
+ wait_event(info->wait_receive_queues,
+ info->count_receive_queue + info->count_empty_packet_queue
+ == info->receive_credit_max);
+ destroy_receive_buffers(info);
- log_rdma_event(INFO, "wait for transport being destroyed\n");
- wait_event(info->wait_destroy,
- info->transport_status == SMBD_DESTROYED);
+ /*
+ * For performance reasons, memory registration and deregistration
+ * are not locked by srv_mutex. It is possible some processes are
+ * blocked on transport srv_mutex while holding memory registration.
+ * Release the transport srv_mutex to allow them to hit the failure
+ * path when sending data, and then release memory registartions.
+ */
+ log_rdma_event(INFO, "freeing mr list\n");
+ wake_up_interruptible_all(&info->wait_mr);
+ while (atomic_read(&info->mr_used_count)) {
+ mutex_unlock(&server->srv_mutex);
+ msleep(1000);
+ mutex_lock(&server->srv_mutex);
+ }
+ destroy_mr_list(info);
+
+ ib_free_cq(info->send_cq);
+ ib_free_cq(info->recv_cq);
+ ib_dealloc_pd(info->pd);
+ rdma_destroy_id(info->id);
+
+ /* free mempools */
+ mempool_destroy(info->request_mempool);
+ kmem_cache_destroy(info->request_cache);
+
+ mempool_destroy(info->response_mempool);
+ kmem_cache_destroy(info->response_cache);
+
+ info->transport_status = SMBD_DESTROYED;
destroy_workqueue(info->workqueue);
log_rdma_event(INFO, "rdma session destroyed\n");
kfree(info);
+ server->smbd_conn = NULL;
}
/*
@@ -1514,17 +1598,9 @@ int smbd_reconnect(struct TCP_Server_Info *server)
*/
if (server->smbd_conn->transport_status == SMBD_CONNECTED) {
log_rdma_event(INFO, "disconnecting transport\n");
- smbd_disconnect_rdma_connection(server->smbd_conn);
+ smbd_destroy(server);
}
- /* wait until the transport is destroyed */
- if (!wait_event_timeout(server->smbd_conn->wait_destroy,
- server->smbd_conn->transport_status == SMBD_DESTROYED, 5*HZ))
- return -EAGAIN;
-
- destroy_workqueue(server->smbd_conn->workqueue);
- kfree(server->smbd_conn);
-
create_conn:
log_rdma_event(INFO, "creating rdma session\n");
server->smbd_conn = smbd_get_connection(
@@ -1741,12 +1817,13 @@ static struct smbd_connection *_smbd_get_connection(
conn_param.retry_count = SMBD_CM_RETRY;
conn_param.rnr_retry_count = SMBD_CM_RNR_RETRY;
conn_param.flow_control = 0;
- init_waitqueue_head(&info->wait_destroy);
log_rdma_event(INFO, "connecting to IP %pI4 port %d\n",
&addr_in->sin_addr, port);
init_waitqueue_head(&info->conn_wait);
+ init_waitqueue_head(&info->disconn_wait);
+ init_waitqueue_head(&info->wait_reassembly_queue);
rc = rdma_connect(info->id, &conn_param);
if (rc) {
log_rdma_event(ERR, "rdma_connect() failed with %i\n", rc);
@@ -1770,8 +1847,6 @@ static struct smbd_connection *_smbd_get_connection(
}
init_waitqueue_head(&info->wait_send_queue);
- init_waitqueue_head(&info->wait_reassembly_queue);
-
INIT_DELAYED_WORK(&info->idle_timer_work, idle_connection_timer);
INIT_DELAYED_WORK(&info->send_immediate_work, send_immediate_work);
queue_delayed_work(info->workqueue, &info->idle_timer_work,
@@ -1812,7 +1887,8 @@ static struct smbd_connection *_smbd_get_connection(
allocate_mr_failed:
/* At this point, need to a full transport shutdown */
- smbd_destroy(info);
+ server->smbd_conn = info;
+ smbd_destroy(server);
return NULL;
negotiation_failed:
@@ -2378,6 +2454,7 @@ static int allocate_mr_list(struct smbd_connection *info)
atomic_set(&info->mr_ready_count, 0);
atomic_set(&info->mr_used_count, 0);
init_waitqueue_head(&info->wait_for_mr_cleanup);
+ INIT_WORK(&info->mr_recovery_work, smbd_mr_recovery_work);
/* Allocate more MRs (2x) than hardware responder_resources */
for (i = 0; i < info->responder_resources * 2; i++) {
smbdirect_mr = kzalloc(sizeof(*smbdirect_mr), GFP_KERNEL);
@@ -2406,13 +2483,13 @@ static int allocate_mr_list(struct smbd_connection *info)
list_add_tail(&smbdirect_mr->list, &info->mr_list);
atomic_inc(&info->mr_ready_count);
}
- INIT_WORK(&info->mr_recovery_work, smbd_mr_recovery_work);
return 0;
out:
kfree(smbdirect_mr);
list_for_each_entry_safe(smbdirect_mr, tmp, &info->mr_list, list) {
+ list_del(&smbdirect_mr->list);
ib_dereg_mr(smbdirect_mr->mr);
kfree(smbdirect_mr->sgl);
kfree(smbdirect_mr);
diff --git a/fs/cifs/smbdirect.h b/fs/cifs/smbdirect.h
index b5c240ff2..b0ca7df41 100644
--- a/fs/cifs/smbdirect.h
+++ b/fs/cifs/smbdirect.h
@@ -71,6 +71,7 @@ struct smbd_connection {
struct completion ri_done;
wait_queue_head_t conn_wait;
wait_queue_head_t wait_destroy;
+ wait_queue_head_t disconn_wait;
struct completion negotiate_completion;
bool negotiate_done;
@@ -288,7 +289,7 @@ struct smbd_connection *smbd_get_connection(
/* Reconnect SMBDirect session */
int smbd_reconnect(struct TCP_Server_Info *server);
/* Destroy SMBDirect session */
-void smbd_destroy(struct smbd_connection *info);
+void smbd_destroy(struct TCP_Server_Info *server);
/* Interface for carrying upper layer I/O through send/recv */
int smbd_recv(struct smbd_connection *info, struct msghdr *msg);
@@ -331,7 +332,7 @@ struct smbd_connection {};
static inline void *smbd_get_connection(
struct TCP_Server_Info *server, struct sockaddr *dstaddr) {return NULL;}
static inline int smbd_reconnect(struct TCP_Server_Info *server) {return -1; }
-static inline void smbd_destroy(struct smbd_connection *info) {}
+static inline void smbd_destroy(struct TCP_Server_Info *server) {}
static inline int smbd_recv(struct smbd_connection *info, struct msghdr *msg) {return -1; }
static inline int smbd_send(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *rqst) {return -1; }
#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 05:18:36 +0000