diff options
| author | Jeremy Allison <jra@samba.org> | 2006-07-29 19:14:24 +0000 |
|---|---|---|
| committer | Gerald (Jerry) Carter <jerry@samba.org> | 2007-10-10 11:38:25 -0500 |
| commit | 2c6030415e0b1f421ea6e85fe6ffe7389ee7a941 (patch) | |
| tree | 3cd4c3c78862d48be0653db5e7c34314bf607e45 /source3/include/locking.h | |
| parent | 4e9df2fba37e4b1422bfda9781c7c486cfec7ed1 (diff) | |
| download | samba-2c6030415e0b1f421ea6e85fe6ffe7389ee7a941.tar.gz samba-2c6030415e0b1f421ea6e85fe6ffe7389ee7a941.tar.xz samba-2c6030415e0b1f421ea6e85fe6ffe7389ee7a941.zip | |
r17314: Optimisation for POSIX locking. If we're downgrading
a POSIX lock (applying a read-lock) and we overlap
pending read locks then send them an unlock message,
we may have allowed them to proceed.
Jeremy.
(This used to be commit a7a0b6ba50f4cf7c5a0a29809fdff9e1266a29e7)
Diffstat (limited to 'source3/include/locking.h')
| -rw-r--r-- | source3/include/locking.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/source3/include/locking.h b/source3/include/locking.h index 9e70411fa6..a09e7d1aff 100644 --- a/source3/include/locking.h +++ b/source3/include/locking.h @@ -23,11 +23,15 @@ #define _LOCKING_H /* passed to br lock code - the UNLOCK_LOCK should never be stored into the tdb - and is used in calculating POSIX unlock ranges only. */ + and is used in calculating POSIX unlock ranges only. We differentiate between + PENDING read and write locks to allow posix lock downgrades to trigger a lock + re-evaluation. */ -enum brl_type {READ_LOCK, WRITE_LOCK, PENDING_LOCK, UNLOCK_LOCK}; +enum brl_type {READ_LOCK, WRITE_LOCK, PENDING_READ_LOCK, PENDING_WRITE_LOCK, UNLOCK_LOCK}; enum brl_flavour {WINDOWS_LOCK = 0, POSIX_LOCK = 1}; +#define IS_PENDING_LOCK(type) ((type) == PENDING_READ_LOCK || (type) == PENDING_WRITE_LOCK) + /* This contains elements that differentiate locks. The smbpid is a client supplied pid, and is essentially the locking context for this client */ |