From: Long Li <longli@linuxonhyperv.com>
To: Steve French <sfrench@samba.org>,
linux-cifs@vger.kernel.org, samba-technical@lists.samba.org,
linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org
Cc: Long Li <longli@microsoft.com>
Subject: [Patch v3 08/16] CIFS: SMBD: Support page offset in RDMA send
Date: Sat, 8 Sep 2018 02:13:40 +0000 [thread overview]
Message-ID: <20180908021348.19956-9-longli@linuxonhyperv.com> (raw)
In-Reply-To: <20180908021348.19956-1-longli@linuxonhyperv.com>
From: Long Li <longli@microsoft.com>
The RDMA send function needs to look at offset in the request pages, and
send data starting from there.
Signed-off-by: Long Li <longli@microsoft.com>
---
fs/cifs/smbdirect.c | 27 +++++++++++++++++++--------
1 file changed, 19 insertions(+), 8 deletions(-)
diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index c62f7c9..6141e3c 100644
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -17,6 +17,7 @@
#include <linux/highmem.h>
#include "smbdirect.h"
#include "cifs_debug.h"
+#include "cifsproto.h"
static struct smbd_response *get_empty_queue_buffer(
struct smbd_connection *info);
@@ -2082,7 +2083,7 @@ int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst)
struct kvec vec;
int nvecs;
int size;
- int buflen = 0, remaining_data_length;
+ unsigned int buflen = 0, remaining_data_length;
int start, i, j;
int max_iov_size =
info->max_send_size - sizeof(struct smbd_data_transfer);
@@ -2113,10 +2114,17 @@ int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst)
buflen += iov[i].iov_len;
}
- /* add in the page array if there is one */
+ /*
+ * Add in the page array if there is one. The caller needs to set
+ * rq_tailsz to PAGE_SIZE when the buffer has multiple pages and
+ * ends at page boundary
+ */
if (rqst->rq_npages) {
- buflen += rqst->rq_pagesz * (rqst->rq_npages - 1);
- buflen += rqst->rq_tailsz;
+ if (rqst->rq_npages == 1)
+ buflen += rqst->rq_tailsz;
+ else
+ buflen += rqst->rq_pagesz * (rqst->rq_npages - 1) -
+ rqst->rq_offset + rqst->rq_tailsz;
}
if (buflen + sizeof(struct smbd_data_transfer) >
@@ -2213,8 +2221,9 @@ int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst)
/* now sending pages if there are any */
for (i = 0; i < rqst->rq_npages; i++) {
- buflen = (i == rqst->rq_npages-1) ?
- rqst->rq_tailsz : rqst->rq_pagesz;
+ unsigned int offset;
+
+ rqst_page_get_length(rqst, i, &buflen, &offset);
nvecs = (buflen + max_iov_size - 1) / max_iov_size;
log_write(INFO, "sending pages buflen=%d nvecs=%d\n",
buflen, nvecs);
@@ -2225,9 +2234,11 @@ int smbd_send(struct smbd_connection *info, struct smb_rqst *rqst)
remaining_data_length -= size;
log_write(INFO, "sending pages i=%d offset=%d size=%d"
" remaining_data_length=%d\n",
- i, j*max_iov_size, size, remaining_data_length);
+ i, j*max_iov_size+offset, size,
+ remaining_data_length);
rc = smbd_post_send_page(
- info, rqst->rq_pages[i], j*max_iov_size,
+ info, rqst->rq_pages[i],
+ j*max_iov_size + offset,
size, remaining_data_length);
if (rc)
goto done;
--
2.7.4
next prev parent reply other threads:[~2018-09-08 2:13 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-08 2:13 [Patch v3 00/16] CIFS: add support for direct I/O Long Li
2018-09-08 2:13 ` [Patch v3 01/16] CIFS: Add support for direct pages in rdata Long Li
2018-09-08 2:13 ` [Patch v3 02/16] CIFS: Use offset when reading pages Long Li
2018-09-08 2:13 ` [Patch v3 03/16] CIFS: Add support for direct pages in wdata Long Li
2018-09-08 2:13 ` [Patch v3 04/16] CIFS: pass page offset when issuing SMB write Long Li
2018-09-08 2:13 ` [Patch v3 05/16] CIFS: Calculate the correct request length based on page offset and tail size Long Li
2018-09-08 2:13 ` [Patch v3 06/16] CIFS: Introduce helper function to get page offset and length in smb_rqst Long Li
2018-09-08 2:13 ` [Patch v3 07/16] CIFS: When sending data on socket, pass the correct page offset Long Li
2018-09-08 2:13 ` Long Li [this message]
2018-09-08 2:13 ` [Patch v3 09/16] CIFS: SMBD: Support page offset in RDMA recv Long Li
2018-09-08 2:13 ` [Patch v3 10/16] CIFS: SMBD: Do not call ib_dereg_mr on invalidated memory registration Long Li
2018-09-08 2:13 ` [Patch v3 11/16] CIFS: SMBD: Support page offset in " Long Li
2018-09-08 2:13 ` [Patch v3 12/16] CIFS: Pass page offset for calculating signature Long Li
2018-09-08 2:13 ` [Patch v3 13/16] CIFS: Pass page offset for encrypting Long Li
2018-09-08 2:13 ` [Patch v3 14/16] CIFS: Add support for direct I/O read Long Li
2018-09-08 2:13 ` [Patch v3 15/16] CIFS: Add support for direct I/O write Long Li
2018-09-08 2:13 ` [Patch v3 16/16] CIFS: Add direct I/O functions to file_operations Long Li
2018-09-15 9:28 ` [Patch v3 00/16] CIFS: add support for direct I/O Steve French
2018-09-15 20:57 ` Long Li
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