diff options
| author | Long Li <longli@microsoft.com> | 2018-05-30 12:48:00 -0700 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2018-06-05 17:42:03 -0500 |
| commit | b6903bcf0acc9961fc0eedf0b3c1eadb9020758f (patch) | |
| tree | 4134762334489fbe477c8885a5779ada966bff45 | |
| parent | e8157b2729c9a3d1d331eb5714d0651e3bd271ea (diff) | |
| download | linux-b6903bcf0acc9961fc0eedf0b3c1eadb9020758f.tar.bz2 | |
CIFS: SMBD: Support page offset in RDMA send
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>
Signed-off-by: Steve French <stfrench@microsoft.com>
| -rw-r--r-- | fs/cifs/smbdirect.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c index c62f7c95683c..6141e3ce3442 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; |