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samba-mirror/source3/include/locking.h

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r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
/*
Unix SMB/CIFS implementation.
SMB parameters and setup, plus a whole lot more.
Copyright (C) Jeremy Allison 2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
r23779: Change from v2 or later to v3 or later. Jeremy. (This used to be commit 407e6e695b8366369b7c76af1ff76869b45347b3)
2007-07-09 23:25:36 +04:00
the Free Software Foundation; either version 3 of the License, or
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
r23784: use the GPLv3 boilerplate as recommended by the FSF and the license text (This used to be commit b0132e94fc5fef936aa766fb99a306b3628e9f07)
2007-07-10 04:52:41 +04:00
along with this program. If not, see <http://www.gnu.org/licenses/>.
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
*/
#ifndef _LOCKING_H
#define _LOCKING_H
/* passed to br lock code - the UNLOCK_LOCK should never be stored into the tdb
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)
2006-07-29 23:14:24 +04:00
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. */
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
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)
2006-07-29 23:14:24 +04:00
enum brl_type {READ_LOCK, WRITE_LOCK, PENDING_READ_LOCK, PENDING_WRITE_LOCK, UNLOCK_LOCK};
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
enum brl_flavour {WINDOWS_LOCK = 0, POSIX_LOCK = 1};
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)
2006-07-29 23:14:24 +04:00
#define IS_PENDING_LOCK(type) ((type) == PENDING_READ_LOCK || (type) == PENDING_WRITE_LOCK)
s3-messages: only include messages.h where needed. Guenther
2011-03-24 17:31:06 +03:00
#include "librpc/gen_ndr/server_id.h"
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
/* This contains elements that differentiate locks. The smbpid is a
client supplied pid, and is essentially the locking context for
this client */
struct lock_context {
This patch looks bigger than it is. It does 2 things. 1). Renames smbpid -> smblctx in our locking code. 2). Widens smblctx to 64-bits internally. Preparing to use the SMB2 handle as the locking context. Jeremy.
2010-05-07 17:20:50 +04:00
uint64_t smblctx;
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
uint16 tid;
r22736: Start to merge the low-hanging fruit from the now 7000-line cluster patch. This changes "struct process_id" to "struct server_id", keeping both is just too much hassle. No functional change (I hope ;-)) Volker (This used to be commit 0ad4b1226c9d91b72136310d3bbb640d2c5d67b8)
2007-05-07 13:35:35 +04:00
struct server_id pid;
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
};
r23183: Check in a change made by Tridge: This replaces the internal explicit dev/ino file id representation by a "struct file_id". This is necessary as cluster file systems and NFS don't necessarily assign the same device number to the shared file system. With this structure in place we can now easily add different schemes to map a file to a unique 64-bit device node. Jeremy, you might note that I did not change the external interface of smb_share_modes.c. Volker (This used to be commit 9b10dbbd5de8813fc15ebbb6be9b18010ffe8139)
2007-05-29 13:30:34 +04:00
struct files_struct;
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
s3-build: move file_id.c into samba3-util and create a private header
2012-04-16 09:34:40 +04:00
#include "lib/file_id.h"
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
struct byte_range_lock {
r17098: Samba3 now cleanly passes Samba4 RAW-LOCK torture test. Phew - that was painful :-). But what it means is that we now implement lock cancels and I can add lock cancels into POSIX lock handling which will fix the fast/slow system call issue with cifsfs ! Jeremy. (This used to be commit f1a9cf075b87c76c032d19da0168424c90f6cb3c)
2006-07-18 01:09:02 +04:00
struct files_struct *fsp;
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
unsigned int num_locks;
RIP BOOL. Convert BOOL -> bool. I found a few interesting bugs in various places whilst doing this (places that assumed BOOL == int). I also need to fix the Samba4 pidl generation (next checkin). Jeremy. (This used to be commit f35a266b3cbb3e5fa6a86be60f34fe340a3ca71f)
2007-10-19 04:40:25 +04:00
bool modified;
bool read_only;
r23183: Check in a change made by Tridge: This replaces the internal explicit dev/ino file id representation by a "struct file_id". This is necessary as cluster file systems and NFS don't necessarily assign the same device number to the shared file system. With this structure in place we can now easily add different schemes to map a file to a unique 64-bit device node. Jeremy, you might note that I did not change the external interface of smb_share_modes.c. Volker (This used to be commit 9b10dbbd5de8813fc15ebbb6be9b18010ffe8139)
2007-05-29 13:30:34 +04:00
struct file_id key;
r22688: Change lock_data in struct byte_range_lock from void * to struct lock_struct * (This used to be commit 8e0e278961ebf2fa4301874d522636699ace1b9b)
2007-05-06 00:43:06 +04:00
struct lock_struct *lock_data;
r23165: Convert brlock.tdb to dbwrap (This used to be commit 84f9885cf8cc57dcf3c2738d6b245de314890a41)
2007-05-27 14:35:14 +04:00
struct db_record *record;
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
};
/* Internal structure in brlock.tdb.
The data in brlock records is an unsorted linear array of these
records. It is unnecessary to store the count as tdb provides the
size of the record */
struct lock_struct {
struct lock_context context;
br_off start;
br_off size;
uint16 fnum;
enum brl_type lock_type;
enum brl_flavour lock_flav;
};
Add VFS ops for Windows BRL: Lock, Unlock and Cancel: This patch adds 3 new VFS OPs for Windows byte range locking: BRL_LOCK_WINDOWS, BRL_UNLOCK_WINDOWS and BRL_CANCEL_WINDOWS. Specifically: * I renamed brl_lock_windows, brl_unlock_windows and brl_lock_cancel to *_default as the default implementations of the VFS ops. * The blocking_lock_record (BLR) is now passed into the brl_lock_windows and brl_cancel_windows paths. The Onefs implementation uses it - future implementations may find it useful too. * Created brl_lock_cancel to do what brl_lock/brl_unlock do: set up a lock_struct and call either the Posix or Windows lock function. These happen to be the same for the default implementation. * Added helper functions: increment_current_lock_count() and decrement_current_lock_count(). * Minor spelling correction in brl_timeout_fn: brl -> blr. * Changed blocking_lock_cancel() to return the BLR that it has cancelled. This allows us to assert its the lock that we wanted to cancel. If this assert ever fires, this path will need to take in the BLR to cancel, rather than choosing on its own. * Adds a small helper function: find_blocking_lock_record_by_id(). Used by the OneFS implementation, but could be useful for others.
2009-02-10 08:51:29 +03:00
/****************************************************************************
This is the structure to queue to implement blocking locks.
*****************************************************************************/
struct blocking_lock_record {
struct blocking_lock_record *next;
struct blocking_lock_record *prev;
struct files_struct *fsp;
struct timeval expire_time;
int lock_num;
uint64_t offset;
uint64_t count;
This patch looks bigger than it is. It does 2 things. 1). Renames smbpid -> smblctx in our locking code. 2). Widens smblctx to 64-bits internally. Preparing to use the SMB2 handle as the locking context. Jeremy.
2010-05-07 17:20:50 +04:00
uint64_t smblctx;
uint64_t blocking_smblctx; /* Context that blocks us. */
Add VFS ops for Windows BRL: Lock, Unlock and Cancel: This patch adds 3 new VFS OPs for Windows byte range locking: BRL_LOCK_WINDOWS, BRL_UNLOCK_WINDOWS and BRL_CANCEL_WINDOWS. Specifically: * I renamed brl_lock_windows, brl_unlock_windows and brl_lock_cancel to *_default as the default implementations of the VFS ops. * The blocking_lock_record (BLR) is now passed into the brl_lock_windows and brl_cancel_windows paths. The Onefs implementation uses it - future implementations may find it useful too. * Created brl_lock_cancel to do what brl_lock/brl_unlock do: set up a lock_struct and call either the Posix or Windows lock function. These happen to be the same for the default implementation. * Added helper functions: increment_current_lock_count() and decrement_current_lock_count(). * Minor spelling correction in brl_timeout_fn: brl -> blr. * Changed blocking_lock_cancel() to return the BLR that it has cancelled. This allows us to assert its the lock that we wanted to cancel. If this assert ever fires, this path will need to take in the BLR to cancel, rather than choosing on its own. * Adds a small helper function: find_blocking_lock_record_by_id(). Used by the OneFS implementation, but could be useful for others.
2009-02-10 08:51:29 +03:00
enum brl_flavour lock_flav;
enum brl_type lock_type;
struct smb_request *req;
void *blr_private; /* Implementation specific. */
};
Plumb the SMB2 front end into the blocking lock backend. Metze, you'll probably be happier with this work as it doesn't abuse tevent in the way you dislike. This is a first cut at the code, which will need lots of testing but I'm hoping this will give people an idea of where I'm going with this. Jeremy.
2010-05-01 08:03:20 +04:00
struct smbd_lock_element {
This patch looks bigger than it is. It does 2 things. 1). Renames smbpid -> smblctx in our locking code. 2). Widens smblctx to 64-bits internally. Preparing to use the SMB2 handle as the locking context. Jeremy.
2010-05-07 17:20:50 +04:00
uint64_t smblctx;
Plumb the SMB2 front end into the blocking lock backend. Metze, you'll probably be happier with this work as it doesn't abuse tevent in the way you dislike. This is a first cut at the code, which will need lots of testing but I'm hoping this will give people an idea of where I'm going with this. Jeremy.
2010-05-01 08:03:20 +04:00
enum brl_type brltype;
uint64_t offset;
uint64_t count;
};
r16945: Sync trunk -> 3.0 for 3.0.24 code. Still need to do the upper layer directories but this is what everyone is waiting for.... Jeremy. (This used to be commit 9dafb7f48ca3e7af956b0a7d1720c2546fc4cfb8)
2006-07-11 22:01:26 +04:00
#endif /* _LOCKING_H_ */
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