diff options
| -rw-r--r-- | fs/cifs/cifsglob.h | 23 | ||||
| -rw-r--r-- | fs/cifs/cifsproto.h | 5 | ||||
| -rw-r--r-- | fs/cifs/cifssmb.c | 5 | ||||
| -rw-r--r-- | fs/cifs/connect.c | 6 | ||||
| -rw-r--r-- | fs/cifs/transport.c | 5 |
5 files changed, 34 insertions, 10 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index a73dd1d5e7ef..d153d0b89d39 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -656,8 +656,24 @@ static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon, struct mid_q_entry; /* - * This is the prototype for the mid callback function. When creating one, - * take special care to avoid deadlocks. Things to bear in mind: + * This is the prototype for the mid receive function. This function is for + * receiving the rest of the SMB frame, starting with the WordCount (which is + * just after the MID in struct smb_hdr). Note: + * + * - This will be called by cifsd, with no locks held. + * - The mid will still be on the pending_mid_q. + * - mid->resp_buf will point to the current buffer. + * + * Returns zero on a successful receive, or an error. The receive state in + * the TCP_Server_Info will also be updated. + */ +typedef int (mid_receive_t)(struct TCP_Server_Info *server, + struct mid_q_entry *mid); + +/* + * This is the prototype for the mid callback function. This is called once the + * mid has been received off of the socket. When creating one, take special + * care to avoid deadlocks. Things to bear in mind: * * - it will be called by cifsd, with no locks held * - the mid will be removed from any lists @@ -675,9 +691,10 @@ struct mid_q_entry { unsigned long when_sent; /* time when smb send finished */ unsigned long when_received; /* when demux complete (taken off wire) */ #endif + mid_receive_t *receive; /* call receive callback */ mid_callback_t *callback; /* call completion callback */ void *callback_data; /* general purpose pointer for callback */ - struct smb_hdr *resp_buf; /* response buffer */ + struct smb_hdr *resp_buf; /* pointer to received SMB header */ int midState; /* wish this were enum but can not pass to wait_event */ __u8 command; /* smb command code */ bool largeBuf:1; /* if valid response, is pointer to large buf */ diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index a1fa9cec05d6..8a7adb31ffed 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -69,8 +69,9 @@ extern struct mid_q_entry *AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server); extern void DeleteMidQEntry(struct mid_q_entry *midEntry); extern int cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov, - unsigned int nvec, mid_callback_t *callback, - void *cbdata, bool ignore_pend); + unsigned int nvec, mid_receive_t *receive, + mid_callback_t *callback, void *cbdata, + bool ignore_pend); extern int SendReceive(const unsigned int /* xid */ , struct cifs_ses *, struct smb_hdr * /* input */ , struct smb_hdr * /* out */ , diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index c824c106b2b7..0613df4d8e74 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -737,7 +737,8 @@ CIFSSMBEcho(struct TCP_Server_Info *server) iov.iov_base = smb; iov.iov_len = be32_to_cpu(smb->hdr.smb_buf_length) + 4; - rc = cifs_call_async(server, &iov, 1, cifs_echo_callback, server, true); + rc = cifs_call_async(server, &iov, 1, NULL, cifs_echo_callback, + server, true); if (rc) cFYI(1, "Echo request failed: %d", rc); @@ -1834,7 +1835,7 @@ cifs_async_writev(struct cifs_writedata *wdata) kref_get(&wdata->refcount); rc = cifs_call_async(tcon->ses->server, iov, wdata->nr_pages + 1, - cifs_writev_callback, wdata, false); + NULL, cifs_writev_callback, wdata, false); if (rc == 0) cifs_stats_inc(&tcon->num_writes); diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index f05dedda37c6..eeee2f5d13ce 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -824,7 +824,11 @@ cifs_demultiplex_thread(void *p) mid_entry = find_mid(server, smb_buffer); - length = standard_receive3(server, mid_entry); + if (!mid_entry || !mid_entry->receive) + length = standard_receive3(server, mid_entry); + else + length = mid_entry->receive(server, mid_entry); + if (length < 0) continue; diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 33a3fbf3a3a5..e7398d0cd054 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -339,8 +339,8 @@ wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *midQ) */ int cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov, - unsigned int nvec, mid_callback_t *callback, void *cbdata, - bool ignore_pend) + unsigned int nvec, mid_receive_t *receive, + mid_callback_t *callback, void *cbdata, bool ignore_pend) { int rc; struct mid_q_entry *mid; @@ -374,6 +374,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct kvec *iov, goto out_err; } + mid->receive = receive; mid->callback = callback; mid->callback_data = cbdata; mid->midState = MID_REQUEST_SUBMITTED; |