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| author | dd <dd@FreeBSD.org> | 2001-08-07 19:23:16 +0000 |
|---|---|---|
| committer | dd <dd@FreeBSD.org> | 2001-08-07 19:23:16 +0000 |
| commit | 045a8bbdf3d204f9af49aeba72bc5c7d309b57ec (patch) | |
| tree | a89d9c90f75b5523685db7844d5fb94cba02cc76 /sys/sys/mdioctl.h | |
| parent | b80b9bc08636427818bc7ee7ac20841643ad1025 (diff) | |
| download | FreeBSD-src-045a8bbdf3d204f9af49aeba72bc5c7d309b57ec.zip FreeBSD-src-045a8bbdf3d204f9af49aeba72bc5c7d309b57ec.tar.gz | |
Introduce a force option, MD_FORCE, that instructs the driver to
bypass some extra anti-foot-shooting measures. Currently, its only
effect is to allow detaching a device while it's still open (e.g.,
mounted). This is useful for testing how the system reacts to a disk
suddenly going away, which can happen with some removeable media.
At this point, the force option is only checked on detach, so it
would've been possible to allow the option to be passed with the
MDIOCDETACH operation. This was not done to allow the possibility of
having the force flag influence other tests in the future, which may
not necessarily deal with detaching the device.
Reviewed by: sobomax
Approved by: phk
Diffstat (limited to 'sys/sys/mdioctl.h')
| -rw-r--r-- | sys/sys/mdioctl.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/sys/mdioctl.h b/sys/sys/mdioctl.h index 6ebda6b..6b16fde 100644 --- a/sys/sys/mdioctl.h +++ b/sys/sys/mdioctl.h @@ -84,5 +84,6 @@ struct md_ioctl { #define MD_AUTOUNIT 0x04 /* Assign next free unit */ #define MD_READONLY 0x08 /* Readonly mode */ #define MD_COMPRESS 0x10 /* Compression mode */ +#define MD_FORCE 0x20 /* Don't try to prevent foot-shooting */ #endif /* _SYS_MDIOCTL_H_*/ |
