[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PATCH v3 3/3] block: get max_transfer limit for char (scsi

From: Eric Farman
Subject: [Qemu-devel] [PATCH v3 3/3] block: get max_transfer limit for char (scsi-generic) devices
Date: Fri, 20 Jan 2017 17:25:27 +0100

We can get the maximum number of bytes for a single I/O transfer
from the BLKSECTGET ioctl, but we only perform this for block
devices.  scsi-generic devices are represented as character devices,
and so do not issue this today.  Update this, so that virtio-scsi
devices using the scsi-generic interface can return the same data.

Signed-off-by: Eric Farman <address@hidden>
 block/file-posix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/file-posix.c b/block/file-posix.c
index 9f83725..2134e0e 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -674,7 +674,7 @@ static void raw_refresh_limits(BlockDriverState *bs, Error 
     struct stat st;
     if (!fstat(s->fd, &st)) {
-        if (S_ISBLK(st.st_mode)) {
+        if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode)) {
             int ret = hdev_get_max_transfer_length(bs, s->fd);
             if (ret > 0 && ret <= BDRV_REQUEST_MAX_BYTES) {
                 bs->bl.max_transfer = pow2floor(ret);

reply via email to

[Prev in Thread] Current Thread [Next in Thread]