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- Fix the lockmgr flags so that external flags and internal flags are

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grouped together with room for each set to expand.  This makes the
   external lock mask sane.

Sponsored by:	Isilon Systems, Inc.
This commit is contained in:
Jeff Roberson 2005-03-28 11:31:20 +00:00
parent 9dcc5da318
commit b0685bb184
1 changed files with 33 additions and 35 deletions
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68
sys/sys/lockmgr.h
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@ -101,54 +101,52 @@ struct lock {
*
* These are flags that are passed to the lockmgr routine.
*/
#define LK_TYPE_MASK 0x0000000f /* type of lock sought */
#define LK_SHARED 0x00000001 /* shared lock */
#define LK_EXCLUSIVE 0x00000002 /* exclusive lock */
#define LK_UPGRADE 0x00000003 /* shared-to-exclusive upgrade */
#define LK_EXCLUPGRADE 0x00000004 /* first shared-to-exclusive upgrade */
#define LK_DOWNGRADE 0x00000005 /* exclusive-to-shared downgrade */
#define LK_RELEASE 0x00000006 /* release any type of lock */
#define LK_DRAIN 0x00000007 /* wait for all lock activity to end */
#define LK_EXCLOTHER 0x00000008 /* other process holds lock */
#define LK_TYPE_MASK 0x0000000f /* type of lock sought */
#define LK_SHARED 0x00000001 /* shared lock */
#define LK_EXCLUSIVE 0x00000002 /* exclusive lock */
#define LK_UPGRADE 0x00000003 /* shared-to-exclusive upgrade */
#define LK_EXCLUPGRADE 0x00000004 /* first shared-to-exclusive upgrade */
#define LK_DOWNGRADE 0x00000005 /* exclusive-to-shared downgrade */
#define LK_RELEASE 0x00000006 /* release any type of lock */
#define LK_DRAIN 0x00000007 /* wait for all lock activity to end */
#define LK_EXCLOTHER 0x00000008 /* other process holds lock */
/*
* External lock flags.
*
* The first three flags may be set in lock_init to set their mode permanently,
* These may be set in lock_init to set their mode permanently,
* or passed in as arguments to the lock manager.
*/
#define LK_EXTFLG_MASK 0x03010070 /* mask of external flags */
#define LK_NOWAIT 0x00000010 /* do not sleep to await lock */
#define LK_SLEEPFAIL 0x00000020 /* sleep, then return failure */
#define LK_CANRECURSE 0x00000040 /* allow recursive exclusive lock */
#define LK_NOPAUSE 0x01000000 /* no spinloop */
#define LK_TIMELOCK 0x02000000 /* use lk_timo, else no timeout */
#define LK_EXTFLG_MASK 0x00000ff0 /* mask of external flags */
#define LK_NOWAIT 0x00000010 /* do not sleep to await lock */
#define LK_SLEEPFAIL 0x00000020 /* sleep, then return failure */
#define LK_CANRECURSE 0x00000040 /* allow recursive exclusive lock */
#define LK_NOPAUSE 0x00000080 /* no spinloop */
#define LK_TIMELOCK 0x00000100 /* use lk_timo, else no timeout */
/*
* Nonpersistent external flags.
*/
#define LK_RETRY 0x00001000 /* vn_lock: retry until locked */
#define LK_INTERLOCK 0x00002000 /*
* unlock passed mutex after getting
* lk_interlock
*/
/*
* Internal lock flags.
*
* These flags are used internally to the lock manager.
*/
#define LK_WANT_UPGRADE 0x00000100 /* waiting for share-to-excl upgrade */
#define LK_WANT_EXCL 0x00000200 /* exclusive lock sought */
#define LK_HAVE_EXCL 0x00000400 /* exclusive lock obtained */
#define LK_WAITDRAIN 0x00000800 /* process waiting for lock to drain */
#define LK_DRAINING 0x00004000 /* lock is being drained */
/*
* Control flags
*
* Non-persistent external flags.
*/
#define LK_INTERLOCK 0x00010000 /*
* unlock passed mutex after getting
* lk_interlock
*/
#define LK_RETRY 0x00020000 /* vn_lock: retry until locked */
#define LK_INTERNAL 0x00080000/* The internal lock is already held */
#define LK_WANT_UPGRADE 0x00010000 /* waiting for share-to-excl upgrade */
#define LK_WANT_EXCL 0x00020000 /* exclusive lock sought */
#define LK_HAVE_EXCL 0x00040000 /* exclusive lock obtained */
#define LK_WAITDRAIN 0x00080000 /* process waiting for lock to drain */
#define LK_DRAINING 0x00100000 /* lock is being drained */
#define LK_INTERNAL 0x00200000/* The internal lock is already held */
/*
* Internal state flags corresponding to lk_sharecount, and lk_waitcount
*/
#define LK_SHARE_NONZERO 0x00100000
#define LK_WAIT_NONZERO 0x00200000
#define LK_SHARE_NONZERO 0x01000000
#define LK_WAIT_NONZERO 0x02000000
/*
* Lock return status.