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authorEric Blake <eblake@redhat.com>2021-11-17 11:02:30 -0600
committerEric Blake <eblake@redhat.com>2021-11-22 07:37:15 -0600
commite35574226a63f29e32eda8da5cc14832f19850e2 (patch)
tree04bc0cfd2313140087bb8d7780c9a012fe77efe5 /nbd
parent1644cccea5c71b02b9cf8f78b780e7069a29b189 (diff)
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nbd/server: Simplify zero and trim
Now that the block layer supports 64-bit operations (see commit 2800637a and friends, new to v6.2), we no longer have to self-fragment requests larger than 2G, reverting the workaround added in 890cbccb08 ("nbd: Fix large trim/zero requests", v5.1.0). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20211117170230.1128262-3-eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Diffstat (limited to 'nbd')
-rw-r--r--nbd/server.c23
1 files changed, 3 insertions, 20 deletions
diff --git a/nbd/server.c b/nbd/server.c
index 74ba487..4630dd7 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -2509,16 +2509,8 @@ static coroutine_fn int nbd_handle_request(NBDClient *client,
if (request->flags & NBD_CMD_FLAG_FAST_ZERO) {
flags |= BDRV_REQ_NO_FALLBACK;
}
- ret = 0;
- /* FIXME simplify this when blk_pwrite_zeroes switches to 64-bit */
- while (ret >= 0 && request->len) {
- int align = client->check_align ?: 1;
- int len = MIN(request->len, QEMU_ALIGN_DOWN(BDRV_REQUEST_MAX_BYTES,
- align));
- ret = blk_pwrite_zeroes(exp->common.blk, request->from, len, flags);
- request->len -= len;
- request->from += len;
- }
+ ret = blk_pwrite_zeroes(exp->common.blk, request->from, request->len,
+ flags);
return nbd_send_generic_reply(client, request->handle, ret,
"writing to file failed", errp);
@@ -2532,16 +2524,7 @@ static coroutine_fn int nbd_handle_request(NBDClient *client,
"flush failed", errp);
case NBD_CMD_TRIM:
- ret = 0;
- /* FIXME simplify this when blk_co_pdiscard switches to 64-bit */
- while (ret >= 0 && request->len) {
- int align = client->check_align ?: 1;
- int len = MIN(request->len, QEMU_ALIGN_DOWN(BDRV_REQUEST_MAX_BYTES,
- align));
- ret = blk_co_pdiscard(exp->common.blk, request->from, len);
- request->len -= len;
- request->from += len;
- }
+ ret = blk_co_pdiscard(exp->common.blk, request->from, request->len);
if (ret >= 0 && request->flags & NBD_CMD_FLAG_FUA) {
ret = blk_co_flush(exp->common.blk);
}