xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cifs: convert async read code to use pages array without kmapping

Browse Source 
Replace the "marshal_iov" function with a "read_into_pages" function.
That function will copy the read data off the socket and into the
pages array, kmapping and reading pages one at a time.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
This commit is contained in:
Jeff Layton
2012-09-19 06:22:32 -07:00
committed by Steve French
parent c5fab6f4f0
commit 8321fec436
4 changed files with 80 additions and 81 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
fs/cifs/cifssmb.c
View File

@@ -1496,6 +1496,7 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
/* set up first iov for signature check */
rdata->iov[0].iov_base = buf;
rdata->iov[0].iov_len = server->total_read;
rdata->nr_iov = 1;
cFYI(1, "0: iov_base=%p iov_len=%zu",
rdata->iov[0].iov_base, rdata->iov[0].iov_len);
@@ -1507,23 +1508,11 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
return cifs_readv_discard(server, mid);
}
/* marshal up the page array */
cifs_kmap_lock();
len = rdata->marshal_iov(rdata, data_len);
cifs_kmap_unlock();
data_len -= len;
/* issue the read if we have any iovecs left to fill */
if (rdata->nr_iov > 1) {
length = cifs_readv_from_socket(server, &rdata->iov[1],
rdata->nr_iov - 1, len);
if (length < 0)
return length;
server->total_read += length;
} else {
length = 0;
}
length = rdata->read_into_pages(server, rdata, data_len);
if (length < 0)
return length;
server->total_read += length;
rdata->bytes = length;
cFYI(1, "total_read=%u buflen=%u remaining=%u", server->total_read,
@@ -1544,7 +1533,11 @@ cifs_readv_callback(struct mid_q_entry *mid)
struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
struct TCP_Server_Info *server = tcon->ses->server;
struct smb_rqst rqst = { .rq_iov = rdata->iov,
.rq_nvec = rdata->nr_iov };
.rq_nvec = rdata->nr_iov,
.rq_pages = rdata->pages,
.rq_npages = rdata->nr_pages,
.rq_pagesz = rdata->pagesz,
.rq_tailsz = rdata->tailsz };
cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__,
mid->mid, mid->mid_state, rdata->result, rdata->bytes);