diff options
| author |   Long Li <longli@microsoft.com> | 2018-05-30 12:48:01 -0700 |
|---|---|---|
| committer |   Steve French <stfrench@microsoft.com> | 2018-06-05 17:43:27 -0500 |
| commit | 6509f50cd1167d9540df24578401a2032f0782f8 (patch) | |
| tree | 076977459781290b4bf0c2ad09f4e12319a9330e /fs/cifs/smbdirect.c | |
| parent | CIFS: SMBD: Support page offset in RDMA send (diff) | |
| download | linux-dev-6509f50cd1167d9540df24578401a2032f0782f8.tar.xz linux-dev-6509f50cd1167d9540df24578401a2032f0782f8.zip | |
CIFS: SMBD: Support page offset in RDMA recv
RDMA recv function needs to place data to the correct place starting at
page offset.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/smbdirect.c')
| -rw-r--r-- | fs/cifs/smbdirect.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c index 6141e3ce3442..ba53c5257bbc 100644 --- a/fs/cifs/smbdirect.c +++ b/fs/cifs/smbdirect.c @@ -2004,10 +2004,12 @@ read_rfc1002_done: * return value: actual data read */ static int smbd_recv_page(struct smbd_connection *info, - struct page *page, unsigned int to_read) + struct page *page, unsigned int page_offset, + unsigned int to_read) { int ret; char *to_address; + void *page_address; /* make sure we have the page ready for read */ ret = wait_event_interruptible( @@ -2015,16 +2017,17 @@ static int smbd_recv_page(struct smbd_connection *info, info->reassembly_data_length >= to_read || info->transport_status != SMBD_CONNECTED); if (ret) - return 0; + return ret; /* now we can read from reassembly queue and not sleep */ - to_address = kmap_atomic(page); + page_address = kmap_atomic(page); + to_address = (char *) page_address + page_offset; log_read(INFO, "reading from page=%p address=%p to_read=%d\n", page, to_address, to_read); ret = smbd_recv_buf(info, to_address, to_read); - kunmap_atomic(to_address); + kunmap_atomic(page_address); return ret; } @@ -2038,7 +2041,7 @@ int smbd_recv(struct smbd_connection *info, struct msghdr *msg) { char *buf; struct page *page; - unsigned int to_read; + unsigned int to_read, page_offset; int rc; info->smbd_recv_pending++; @@ -2052,15 +2055,16 @@ int smbd_recv(struct smbd_connection *info, struct msghdr *msg) case READ | ITER_BVEC: page = msg->msg_iter.bvec->bv_page; + page_offset = msg->msg_iter.bvec->bv_offset; to_read = msg->msg_iter.bvec->bv_len; - rc = smbd_recv_page(info, page, to_read); + rc = smbd_recv_page(info, page, page_offset, to_read); break; default: /* It's a bug in upper layer to get there */ cifs_dbg(VFS, "CIFS: invalid msg type %d\n", msg->msg_iter.type); - rc = -EIO; + rc = -EINVAL; } info->smbd_recv_pending--; |