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MFC r200934:

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Add two disk ioctls, giving user-level tools information about disk/array
stripe (optimal access block) size and offset.
This commit is contained in:
Alexander Motin 2010-01-05 13:51:23 +00:00
parent ae07f94f6f
commit 2aa244f295
2 changed files with 18 additions and 1 deletions
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7
sys/geom/geom_dev.c
View file

@ -323,7 +323,12 @@ g_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread
return (ENOENT);
strlcpy(data, pp->name, i);
break;
case DIOCGSTRIPESIZE:
*(off_t *)data = cp->provider->stripesize;
break;
case DIOCGSTRIPEOFFSET:
*(off_t *)data = cp->provider->stripeoffset;
break;
default:
if (cp->provider->geom->ioctl != NULL) {
error = cp->provider->geom->ioctl(cp->provider, cmd, data, fflag, td);

12
sys/sys/disk.h
View file

@ -104,4 +104,16 @@ void disk_err(struct bio *bp, const char *what, int blkdone, int nl);
* must be at least MAXPATHLEN bytes long.
*/
#define DIOCGSTRIPESIZE _IOR('d', 139, off_t) /* Get stripe size in bytes */
/*-
* Get the size of the device's optimal access block in bytes.
* This should be a multiple of the sectorsize.
*/
#define DIOCGSTRIPEOFFSET _IOR('d', 140, off_t) /* Get stripe offset in bytes */
/*-
* Get the offset of the first device's optimal access block in bytes.
* This should be a multiple of the sectorsize.
*/
#endif /* _SYS_DISK_H_ */