d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

bhyveload: correctly query size of disks

Browse Source 
On FreeBSD fstat(2) works fine for querying sizes of plain files,
but not so much for character devices.
So, use DIOCGMEDIASIZE to try to get the correct size for disks
and disk-like devices (e.g. zvols).

PR:		220186
Reviewed by:	tsoome, grehan
MFC after:	1 week
This commit is contained in:
avg 2017-06-21 18:19:27 +00:00
parent 4fffa01fff
commit 231ceb5da5
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
usr.sbin/bhyveload/bhyveload.c
View File

@ -311,10 +311,12 @@ cb_diskioctl(void *arg, int unit, u_long cmd, void *data)
*(u_int *)data = 512;
break;
case DIOCGMEDIASIZE:
if (fstat(disk_fd[unit], &sb) == 0)
*(off_t *)data = sb.st_size;
else
if (fstat(disk_fd[unit], &sb) != 0)
return (ENOTTY);
if (S_ISCHR(sb.st_mode) &&
ioctl(disk_fd[unit], DIOCGMEDIASIZE, &sb.st_size) != 0)
return (ENOTTY);
*(off_t *)data = sb.st_size;
break;
default:
return (ENOTTY);