From 9b7c18a2d4b798963ea80f6769701dcc4c24b55e Mon Sep 17 00:00:00 2001 From: Pavel Shilovsky Date: Wed, 16 Nov 2016 14:06:17 -0800 Subject: [PATCH] CIFS: Add mid handle callback We need to process read responses differently because the data should go directly into preallocated pages. This can be done by specifying a mid handle callback. Signed-off-by: Pavel Shilovsky --- fs/cifs/cifsglob.h | 8 ++++++++ fs/cifs/cifsproto.h | 2 +- fs/cifs/cifssmb.c | 6 +++--- fs/cifs/smb2pdu.c | 10 +++++----- fs/cifs/transport.c | 5 +++-- 5 files changed, 20 insertions(+), 11 deletions(-) diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 35cf62b..8a04a01 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -1312,6 +1312,13 @@ typedef int (mid_receive_t)(struct TCP_Server_Info *server, */ typedef void (mid_callback_t)(struct mid_q_entry *mid); +/* + * This is the protopyte for mid handle function. This is called once the mid + * has been recognized after decryption of the message. + */ +typedef int (mid_handle_t)(struct TCP_Server_Info *server, + struct mid_q_entry *mid); + /* one of these for every pending CIFS request to the server */ struct mid_q_entry { struct list_head qhead; /* mids waiting on reply from this server */ @@ -1326,6 +1333,7 @@ struct mid_q_entry { #endif mid_receive_t *receive; /* call receive callback */ mid_callback_t *callback; /* call completion callback */ + mid_handle_t *handle; /* call handle mid callback */ void *callback_data; /* general purpose pointer for callback */ void *resp_buf; /* pointer to received SMB header */ int mid_state; /* wish this were enum but can not pass to wait_event */ diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 26872f5..057dcdd 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -78,7 +78,7 @@ extern void cifs_wake_up_task(struct mid_q_entry *mid); extern int cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst, mid_receive_t *receive, mid_callback_t *callback, - void *cbdata, const int flags); + mid_handle_t *handle, void *cbdata, const int flags); extern int cifs_send_recv(const unsigned int xid, struct cifs_ses *ses, struct smb_rqst *rqst, int *resp_buf_type, const int flags, struct kvec *resp_iov); diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index be9fa7f..d4b92e3 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -731,7 +731,7 @@ CIFSSMBEcho(struct TCP_Server_Info *server) iov[1].iov_len = get_rfc1002_length(smb); iov[1].iov_base = (char *)smb + 4; - rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback, + rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback, NULL, server, CIFS_ASYNC_OP | CIFS_ECHO_OP); if (rc) cifs_dbg(FYI, "Echo request failed: %d\n", rc); @@ -1654,7 +1654,7 @@ cifs_async_readv(struct cifs_readdata *rdata) kref_get(&rdata->refcount); rc = cifs_call_async(tcon->ses->server, &rqst, cifs_readv_receive, - cifs_readv_callback, rdata, 0); + cifs_readv_callback, NULL, rdata, 0); if (rc == 0) cifs_stats_inc(&tcon->stats.cifs_stats.num_reads); @@ -2168,7 +2168,7 @@ cifs_async_writev(struct cifs_writedata *wdata, kref_get(&wdata->refcount); rc = cifs_call_async(tcon->ses->server, &rqst, NULL, - cifs_writev_callback, wdata, 0); + cifs_writev_callback, NULL, wdata, 0); if (rc == 0) cifs_stats_inc(&tcon->stats.cifs_stats.num_writes); diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index b088c50..12dee85 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -2144,8 +2144,8 @@ SMB2_echo(struct TCP_Server_Info *server) iov[1].iov_len = get_rfc1002_length(req); iov[1].iov_base = (char *)req + 4; - rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, - CIFS_ECHO_OP); + rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL, + server, CIFS_ECHO_OP); if (rc) cifs_dbg(FYI, "Echo request failed: %d\n", rc); @@ -2384,7 +2384,7 @@ smb2_async_readv(struct cifs_readdata *rdata) kref_get(&rdata->refcount); rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, cifs_readv_receive, smb2_readv_callback, - rdata, flags); + NULL, rdata, flags); if (rc) { kref_put(&rdata->refcount, cifs_readdata_release); cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); @@ -2595,8 +2595,8 @@ smb2_async_writev(struct cifs_writedata *wdata, } kref_get(&wdata->refcount); - rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, wdata, - flags); + rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL, + wdata, flags); if (rc) { kref_put(&wdata->refcount, release); diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 3e5791a..526f053 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -504,8 +504,8 @@ cifs_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst) */ int cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst, - mid_receive_t *receive, mid_callback_t *callback, void *cbdata, - const int flags) + mid_receive_t *receive, mid_callback_t *callback, + mid_handle_t *handle, void *cbdata, const int flags) { int rc, timeout, optype; struct mid_q_entry *mid; @@ -532,6 +532,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst, mid->receive = receive; mid->callback = callback; mid->callback_data = cbdata; + mid->handle = handle; mid->mid_state = MID_REQUEST_SUBMITTED; /* put it on the pending_mid_q */ -- 2.7.4