diff options
| author | Eric Blake <eblake@redhat.com> | 2021-11-17 11:02:30 -0600 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2021-11-22 07:37:15 -0600 |
| commit | e35574226a63f29e32eda8da5cc14832f19850e2 (patch) | |
| tree | 04bc0cfd2313140087bb8d7780c9a012fe77efe5 /nbd | |
| parent | 1644cccea5c71b02b9cf8f78b780e7069a29b189 (diff) | |
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.c | 23 |
1 files changed, 3 insertions, 20 deletions
diff --git a/nbd/server.c b/nbd/server.c index 74ba487094..4630dd7322 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); } |