diff options
Diffstat (limited to 'block/file-posix.c')
| -rw-r--r-- | block/file-posix.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/block/file-posix.c b/block/file-posix.c index 28b47d977b..9f83725fc4 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -651,12 +651,15 @@ static void raw_reopen_abort(BDRVReopenState *state) state->opaque = NULL; } -static int hdev_get_max_transfer_length(int fd) +static int hdev_get_max_transfer_length(BlockDriverState *bs, int fd) { #ifdef BLKSECTGET - int max_sectors = 0; - if (ioctl(fd, BLKSECTGET, &max_sectors) == 0) { - return max_sectors; + int max_bytes = 0; + short max_sectors = 0; + if (bs->sg && ioctl(fd, BLKSECTGET, &max_bytes) == 0) { + return max_bytes; + } else if (!bs->sg && ioctl(fd, BLKSECTGET, &max_sectors) == 0) { + return max_sectors << BDRV_SECTOR_BITS; } else { return -errno; } @@ -672,9 +675,9 @@ static void raw_refresh_limits(BlockDriverState *bs, Error **errp) if (!fstat(s->fd, &st)) { if (S_ISBLK(st.st_mode)) { - int ret = hdev_get_max_transfer_length(s->fd); - if (ret > 0 && ret <= BDRV_REQUEST_MAX_SECTORS) { - bs->bl.max_transfer = pow2floor(ret << BDRV_SECTOR_BITS); + int ret = hdev_get_max_transfer_length(bs, s->fd); + if (ret > 0 && ret <= BDRV_REQUEST_MAX_BYTES) { + bs->bl.max_transfer = pow2floor(ret); } } } |