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authorSteven Whitehouse <swhiteho@redhat.com>2009-01-12 05:43:39 -0500
committerSteven Whitehouse <steve@dolmen.chygwyn.com>2009-03-24 07:21:14 -0400
commitf057f6cdf64175db1151b1f5d110e29904f119a1 (patch)
tree582dbf358e351f64977620c29ebf772d693b1948
parent22077f57dec8fcbeb1112b35313961c0902ff038 (diff)
GFS2: Merge lock_dlm module into GFS2
This is the big patch that I've been working on for some time now. There are many reasons for wanting to make this change such as: o Reducing overhead by eliminating duplicated fields between structures o Simplifcation of the code (reduces the code size by a fair bit) o The locking interface is now the DLM interface itself as proposed some time ago. o Fewer lookups of glocks when processing replies from the DLM o Fewer memory allocations/deallocations for each glock o Scope to do further optimisations in the future (but this patch is more than big enough for now!) Please note that (a) this patch relates to the lock_dlm module and not the DLM itself, that is still a separate module; and (b) that we retain the ability to build GFS2 as a standalone single node filesystem with out requiring the DLM. This patch needs a lot of testing, hence my keeping it I restarted my -git tree after the last merge window. That way, this has the maximum exposure before its merged. This is (modulo a few minor bug fixes) the same patch that I've been posting on and off the the last three months and its passed a number of different tests so far. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat
-rw-r--r--fs/gfs2/Kconfig17
-rw-r--r--fs/gfs2/Makefile4
-rw-r--r--fs/gfs2/acl.c1
-rw-r--r--fs/gfs2/bmap.c1
-rw-r--r--fs/gfs2/dir.c1
-rw-r--r--fs/gfs2/eaops.c1
-rw-r--r--fs/gfs2/eattr.c1
-rw-r--r--fs/gfs2/glock.c249
-rw-r--r--fs/gfs2/glock.h127
-rw-r--r--fs/gfs2/glops.c14
-rw-r--r--fs/gfs2/incore.h59
-rw-r--r--fs/gfs2/inode.c13
-rw-r--r--fs/gfs2/inode.h22
-rw-r--r--fs/gfs2/lock_dlm.c240
-rw-r--r--fs/gfs2/locking.c314
-rw-r--r--fs/gfs2/locking/dlm/Makefile3
-rw-r--r--fs/gfs2/locking/dlm/lock.c708
-rw-r--r--fs/gfs2/locking/dlm/lock_dlm.h166
-rw-r--r--fs/gfs2/locking/dlm/main.c48
-rw-r--r--fs/gfs2/locking/dlm/mount.c276
-rw-r--r--fs/gfs2/locking/dlm/sysfs.c226
-rw-r--r--fs/gfs2/locking/dlm/thread.c68
-rw-r--r--fs/gfs2/log.c1
-rw-r--r--fs/gfs2/lops.c1
-rw-r--r--fs/gfs2/main.c3
-rw-r--r--fs/gfs2/meta_io.c1
-rw-r--r--fs/gfs2/mount.c1
-rw-r--r--fs/gfs2/ops_address.c1
-rw-r--r--fs/gfs2/ops_dentry.c1
-rw-r--r--fs/gfs2/ops_export.c1
-rw-r--r--fs/gfs2/ops_file.c74
-rw-r--r--fs/gfs2/ops_fstype.c134
-rw-r--r--fs/gfs2/ops_inode.c1
-rw-r--r--fs/gfs2/ops_super.c1
-rw-r--r--fs/gfs2/quota.c12
-rw-r--r--fs/gfs2/recovery.c28
-rw-r--r--fs/gfs2/rgrp.c1
-rw-r--r--fs/gfs2/super.c1
-rw-r--r--fs/gfs2/sys.c154
-rw-r--r--fs/gfs2/trans.c3
-rw-r--r--fs/gfs2/util.c11
-rw-r--r--include/linux/lm_interface.h277
42 files changed, 819 insertions, 2447 deletions
diff --git a/fs/gfs2/Kconfig b/fs/gfs2/Kconfig
index e563a6449811..3a981b7f64ca 100644
--- a/fs/gfs2/Kconfig
+++ b/fs/gfs2/Kconfig
@@ -1,6 +1,10 @@
1config GFS2_FS 1config GFS2_FS
2 tristate "GFS2 file system support" 2 tristate "GFS2 file system support"
3 depends on EXPERIMENTAL && (64BIT || LBD) 3 depends on EXPERIMENTAL && (64BIT || LBD)
4 select DLM if GFS2_FS_LOCKING_DLM
5 select CONFIGFS_FS if GFS2_FS_LOCKING_DLM
6 select SYSFS if GFS2_FS_LOCKING_DLM
7 select IP_SCTP if DLM_SCTP
4 select FS_POSIX_ACL 8 select FS_POSIX_ACL
5 select CRC32 9 select CRC32
6 help 10 help
@@ -18,17 +22,16 @@ config GFS2_FS
18 the locking module below. Documentation and utilities for GFS2 can 22 the locking module below. Documentation and utilities for GFS2 can
19 be found here: http://sources.redhat.com/cluster 23 be found here: http://sources.redhat.com/cluster
20 24
21 The "nolock" lock module is now built in to GFS2 by default. 25 The "nolock" lock module is now built in to GFS2 by default. If
26 you want to use the DLM, be sure to enable HOTPLUG and IPv4/6
27 networking.
22 28
23config GFS2_FS_LOCKING_DLM 29config GFS2_FS_LOCKING_DLM
24 tristate "GFS2 DLM locking module" 30 bool "GFS2 DLM locking"
25 depends on GFS2_FS && SYSFS && NET && INET && (IPV6 || IPV6=n) 31 depends on (GFS2_FS!=n) && NET && INET && (IPV6 || IPV6=n) && HOTPLUG
26 select IP_SCTP if DLM_SCTP
27 select CONFIGFS_FS
28 select DLM
29 help 32 help
30 Multiple node locking module for GFS2 33 Multiple node locking module for GFS2
31 34
32 Most users of GFS2 will require this module. It provides the locking 35 Most users of GFS2 will require this. It provides the locking
33 interface between GFS2 and the DLM, which is required to use GFS2 36 interface between GFS2 and the DLM, which is required to use GFS2
34 in a cluster environment. 37 in a cluster environment.
diff --git a/fs/gfs2/Makefile b/fs/gfs2/Makefile
index c1b4ec6a9650..a851ea4bdf70 100644
--- a/fs/gfs2/Makefile
+++ b/fs/gfs2/Makefile
@@ -1,9 +1,9 @@
1obj-$(CONFIG_GFS2_FS) += gfs2.o 1obj-$(CONFIG_GFS2_FS) += gfs2.o
2gfs2-y := acl.o bmap.o dir.o eaops.o eattr.o glock.o \ 2gfs2-y := acl.o bmap.o dir.o eaops.o eattr.o glock.o \
3 glops.o inode.o log.o lops.o locking.o main.o meta_io.o \ 3 glops.o inode.o log.o lops.o main.o meta_io.o \
4 mount.o ops_address.o ops_dentry.o ops_export.o ops_file.o \ 4 mount.o ops_address.o ops_dentry.o ops_export.o ops_file.o \
5 ops_fstype.o ops_inode.o ops_super.o quota.o \ 5 ops_fstype.o ops_inode.o ops_super.o quota.o \
6 recovery.o rgrp.o super.o sys.o trans.o util.o 6 recovery.o rgrp.o super.o sys.o trans.o util.o
7 7
8obj-$(CONFIG_GFS2_FS_LOCKING_DLM) += locking/dlm/ 8gfs2-$(CONFIG_GFS2_FS_LOCKING_DLM) += lock_dlm.o
9 9
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index e335dceb6a4f..43764f4fa763 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -15,7 +15,6 @@
15#include <linux/posix_acl.h> 15#include <linux/posix_acl.h>
16#include <linux/posix_acl_xattr.h> 16#include <linux/posix_acl_xattr.h>
17#include <linux/gfs2_ondisk.h> 17#include <linux/gfs2_ondisk.h>
18#include <linux/lm_interface.h>
19 18
20#include "gfs2.h" 19#include "gfs2.h"
21#include "incore.h" 20#include "incore.h"
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 11ffc56f1f81..3a5d3f883e10 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -13,7 +13,6 @@
13#include <linux/buffer_head.h> 13#include <linux/buffer_head.h>
14#include <linux/gfs2_ondisk.h> 14#include <linux/gfs2_ondisk.h>
15#include <linux/crc32.h> 15#include <linux/crc32.h>
16#include <linux/lm_interface.h>
17 16
18#include "gfs2.h" 17#include "gfs2.h"
19#include "incore.h" 18#include "incore.h"
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index b7c8e5c70791..aef4d0c06748 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -60,7 +60,6 @@
60#include <linux/gfs2_ondisk.h> 60#include <linux/gfs2_ondisk.h>
61#include <linux/crc32.h> 61#include <linux/crc32.h>
62#include <linux/vmalloc.h> 62#include <linux/vmalloc.h>
63#include <linux/lm_interface.h>
64 63
65#include "gfs2.h" 64#include "gfs2.h"
66#include "incore.h" 65#include "incore.h"
diff --git a/fs/gfs2/eaops.c b/fs/gfs2/eaops.c
index f114ba2b3557..dee9b03e5b37 100644
--- a/fs/gfs2/eaops.c
+++ b/fs/gfs2/eaops.c
@@ -14,7 +14,6 @@
14#include <linux/capability.h> 14#include <linux/capability.h>
15#include <linux/xattr.h> 15#include <linux/xattr.h>
16#include <linux/gfs2_ondisk.h> 16#include <linux/gfs2_ondisk.h>
17#include <linux/lm_interface.h>
18#include <asm/uaccess.h> 17#include <asm/uaccess.h>
19 18
20#include "gfs2.h" 19#include "gfs2.h"
diff --git a/fs/gfs2/eattr.c b/fs/gfs2/eattr.c
index 0d1c76d906ae..899763aed217 100644
--- a/fs/gfs2/eattr.c
+++ b/fs/gfs2/eattr.c
@@ -13,7 +13,6 @@
13#include <linux/buffer_head.h> 13#include <linux/buffer_head.h>
14#include <linux/xattr.h> 14#include <linux/xattr.h>
15#include <linux/gfs2_ondisk.h> 15#include <linux/gfs2_ondisk.h>
16#include <linux/lm_interface.h>
17#include <asm/uaccess.h> 16#include <asm/uaccess.h>
18 17
19#include "gfs2.h" 18#include "gfs2.h"
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 6b983aef785d..cd200a564c79 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -10,7 +10,6 @@
10#include <linux/sched.h> 10#include <linux/sched.h>
11#include <linux/slab.h> 11#include <linux/slab.h>
12#include <linux/spinlock.h> 12#include <linux/spinlock.h>
13#include <linux/completion.h>
14#include <linux/buffer_head.h> 13#include <linux/buffer_head.h>
15#include <linux/delay.h> 14#include <linux/delay.h>
16#include <linux/sort.h> 15#include <linux/sort.h>
@@ -18,7 +17,6 @@
18#include <linux/kallsyms.h> 17#include <linux/kallsyms.h>
19#include <linux/gfs2_ondisk.h> 18#include <linux/gfs2_ondisk.h>
20#include <linux/list.h> 19#include <linux/list.h>
21#include <linux/lm_interface.h>
22#include <linux/wait.h> 20#include <linux/wait.h>
23#include <linux/module.h> 21#include <linux/module.h>
24#include <linux/rwsem.h> 22#include <linux/rwsem.h>
@@ -155,13 +153,10 @@ static void glock_free(struct gfs2_glock *gl)
155 struct gfs2_sbd *sdp = gl->gl_sbd; 153 struct gfs2_sbd *sdp = gl->gl_sbd;
156 struct inode *aspace = gl->gl_aspace; 154 struct inode *aspace = gl->gl_aspace;
157 155
158 if (sdp->sd_lockstruct.ls_ops->lm_put_lock)
159 sdp->sd_lockstruct.ls_ops->lm_put_lock(gl->gl_lock);
160
161 if (aspace) 156 if (aspace)
162 gfs2_aspace_put(aspace); 157 gfs2_aspace_put(aspace);
163 158
164 kmem_cache_free(gfs2_glock_cachep, gl); 159 sdp->sd_lockstruct.ls_ops->lm_put_lock(gfs2_glock_cachep, gl);
165} 160}
166 161
167/** 162/**
@@ -211,7 +206,6 @@ int gfs2_glock_put(struct gfs2_glock *gl)
211 atomic_dec(&lru_count); 206 atomic_dec(&lru_count);
212 } 207 }
213 spin_unlock(&lru_lock); 208 spin_unlock(&lru_lock);
214 GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_UNLOCKED);
215 GLOCK_BUG_ON(gl, !list_empty(&gl->gl_lru)); 209 GLOCK_BUG_ON(gl, !list_empty(&gl->gl_lru));
216 GLOCK_BUG_ON(gl, !list_empty(&gl->gl_holders)); 210 GLOCK_BUG_ON(gl, !list_empty(&gl->gl_holders));
217 glock_free(gl); 211 glock_free(gl);
@@ -256,27 +250,6 @@ static struct gfs2_glock *search_bucket(unsigned int hash,
256} 250}
257 251
258/** 252/**
259 * gfs2_glock_find() - Find glock by lock number
260 * @sdp: The GFS2 superblock
261 * @name: The lock name
262 *
263 * Returns: NULL, or the struct gfs2_glock with the requested number
264 */
265
266static struct gfs2_glock *gfs2_glock_find(const struct gfs2_sbd *sdp,
267 const struct lm_lockname *name)
268{
269 unsigned int hash = gl_hash(sdp, name);
270 struct gfs2_glock *gl;
271
272 read_lock(gl_lock_addr(hash));
273 gl = search_bucket(hash, sdp, name);
274 read_unlock(gl_lock_addr(hash));
275
276 return gl;
277}
278
279/**
280 * may_grant - check if its ok to grant a new lock 253 * may_grant - check if its ok to grant a new lock
281 * @gl: The glock 254 * @gl: The glock
282 * @gh: The lock request which we wish to grant 255 * @gh: The lock request which we wish to grant
@@ -523,7 +496,7 @@ out_locked:
523} 496}
524 497
525static unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, void *lock, 498static unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, void *lock,
526 unsigned int cur_state, unsigned int req_state, 499 unsigned int req_state,
527 unsigned int flags) 500 unsigned int flags)
528{ 501{
529 int ret = LM_OUT_ERROR; 502 int ret = LM_OUT_ERROR;
@@ -532,7 +505,7 @@ static unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, void *lock,
532 return req_state == LM_ST_UNLOCKED ? 0 : req_state; 505 return req_state == LM_ST_UNLOCKED ? 0 : req_state;
533 506
534 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) 507 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
535 ret = sdp->sd_lockstruct.ls_ops->lm_lock(lock, cur_state, 508 ret = sdp->sd_lockstruct.ls_ops->lm_lock(lock,
536 req_state, flags); 509 req_state, flags);
537 return ret; 510 return ret;
538} 511}
@@ -575,7 +548,7 @@ __acquires(&gl->gl_spin)
575 gl->gl_state == LM_ST_DEFERRED) && 548 gl->gl_state == LM_ST_DEFERRED) &&
576 !(lck_flags & (LM_FLAG_TRY | LM_FLAG_TRY_1CB))) 549 !(lck_flags & (LM_FLAG_TRY | LM_FLAG_TRY_1CB)))
577 lck_flags |= LM_FLAG_TRY_1CB; 550 lck_flags |= LM_FLAG_TRY_1CB;
578 ret = gfs2_lm_lock(sdp, gl->gl_lock, gl->gl_state, target, lck_flags); 551 ret = gfs2_lm_lock(sdp, gl, target, lck_flags);
579 552
580 if (!(ret & LM_OUT_ASYNC)) { 553 if (!(ret & LM_OUT_ASYNC)) {
581 finish_xmote(gl, ret); 554 finish_xmote(gl, ret);
@@ -681,18 +654,6 @@ static void glock_work_func(struct work_struct *work)
681 gfs2_glock_put(gl); 654 gfs2_glock_put(gl);
682} 655}
683 656
684static int gfs2_lm_get_lock(struct gfs2_sbd *sdp, struct lm_lockname *name,
685 void **lockp)
686{
687 int error = -EIO;
688 if (!sdp->sd_lockstruct.ls_ops->lm_get_lock)
689 return 0;
690 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
691 error = sdp->sd_lockstruct.ls_ops->lm_get_lock(
692 sdp->sd_lockstruct.ls_lockspace, name, lockp);
693 return error;
694}
695
696/** 657/**
697 * gfs2_glock_get() - Get a glock, or create one if one doesn't exist 658 * gfs2_glock_get() - Get a glock, or create one if one doesn't exist
698 * @sdp: The GFS2 superblock 659 * @sdp: The GFS2 superblock
@@ -736,6 +697,9 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
736 gl->gl_demote_state = LM_ST_EXCLUSIVE; 697 gl->gl_demote_state = LM_ST_EXCLUSIVE;
737 gl->gl_hash = hash; 698 gl->gl_hash = hash;
738 gl->gl_ops = glops; 699 gl->gl_ops = glops;
700 snprintf(gl->gl_strname, GDLM_STRNAME_BYTES, "%8x%16llx", name.ln_type, (unsigned long long)number);
701 memset(&gl->gl_lksb, 0, sizeof(struct dlm_lksb));
702 gl->gl_lksb.sb_lvbptr = gl->gl_lvb;
739 gl->gl_stamp = jiffies; 703 gl->gl_stamp = jiffies;
740 gl->gl_tchange = jiffies; 704 gl->gl_tchange = jiffies;
741 gl->gl_object = NULL; 705 gl->gl_object = NULL;
@@ -753,10 +717,6 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
753 } 717 }
754 } 718 }
755 719
756 error = gfs2_lm_get_lock(sdp, &name, &gl->gl_lock);
757 if (error)
758 goto fail_aspace;
759
760 write_lock(gl_lock_addr(hash)); 720 write_lock(gl_lock_addr(hash));
761 tmp = search_bucket(hash, sdp, &name); 721 tmp = search_bucket(hash, sdp, &name);
762 if (tmp) { 722 if (tmp) {
@@ -772,9 +732,6 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
772 732
773 return 0; 733 return 0;
774 734
775fail_aspace:
776 if (gl->gl_aspace)
777 gfs2_aspace_put(gl->gl_aspace);
778fail: 735fail:
779 kmem_cache_free(gfs2_glock_cachep, gl); 736 kmem_cache_free(gfs2_glock_cachep, gl);
780 return error; 737 return error;
@@ -966,7 +923,7 @@ do_cancel:
966 if (!(gh->gh_flags & LM_FLAG_PRIORITY)) { 923 if (!(gh->gh_flags & LM_FLAG_PRIORITY)) {
967 spin_unlock(&gl->gl_spin); 924 spin_unlock(&gl->gl_spin);
968 if (sdp->sd_lockstruct.ls_ops->lm_cancel) 925 if (sdp->sd_lockstruct.ls_ops->lm_cancel)
969 sdp->sd_lockstruct.ls_ops->lm_cancel(gl->gl_lock); 926 sdp->sd_lockstruct.ls_ops->lm_cancel(gl);
970 spin_lock(&gl->gl_spin); 927 spin_lock(&gl->gl_spin);
971 } 928 }
972 return; 929 return;
@@ -1240,70 +1197,13 @@ void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs)
1240 gfs2_glock_dq_uninit(&ghs[x]); 1197 gfs2_glock_dq_uninit(&ghs[x]);
1241} 1198}
1242 1199
1243static int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, void *lock, char **lvbp) 1200void gfs2_glock_cb(struct gfs2_glock *gl, unsigned int state)
1244{ 1201{
1245 int error = -EIO;
1246 if (!sdp->sd_lockstruct.ls_ops->lm_hold_lvb)
1247 return 0;
1248 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
1249 error = sdp->sd_lockstruct.ls_ops->lm_hold_lvb(lock, lvbp);
1250 return error;
1251}
1252
1253/**
1254 * gfs2_lvb_hold - attach a LVB from a glock
1255 * @gl: The glock in question
1256 *
1257 */
1258
1259int gfs2_lvb_hold(struct gfs2_glock *gl)
1260{
1261 int error;
1262
1263 if (!atomic_read(&gl->gl_lvb_count)) {
1264 error = gfs2_lm_hold_lvb(gl->gl_sbd, gl->gl_lock, &gl->gl_lvb);
1265 if (error)
1266 return error;
1267 gfs2_glock_hold(gl);
1268 }
1269 atomic_inc(&gl->gl_lvb_count);
1270
1271 return 0;
1272}
1273
1274/**
1275 * gfs2_lvb_unhold - detach a LVB from a glock
1276 * @gl: The glock in question
1277 *
1278 */
1279
1280void gfs2_lvb_unhold(struct gfs2_glock *gl)
1281{
1282 struct gfs2_sbd *sdp = gl->gl_sbd;
1283
1284 gfs2_glock_hold(gl);
1285 gfs2_assert(gl->gl_sbd, atomic_read(&gl->gl_lvb_count) > 0);
1286 if (atomic_dec_and_test(&gl->gl_lvb_count)) {
1287 if (sdp->sd_lockstruct.ls_ops->lm_unhold_lvb)
1288 sdp->sd_lockstruct.ls_ops->lm_unhold_lvb(gl->gl_lock, gl->gl_lvb);
1289 gl->gl_lvb = NULL;
1290 gfs2_glock_put(gl);
1291 }
1292 gfs2_glock_put(gl);
1293}
1294
1295static void blocking_cb(struct gfs2_sbd *sdp, struct lm_lockname *name,
1296 unsigned int state)
1297{
1298 struct gfs2_glock *gl;
1299 unsigned long delay = 0; 1202 unsigned long delay = 0;
1300 unsigned long holdtime; 1203 unsigned long holdtime;
1301 unsigned long now = jiffies; 1204 unsigned long now = jiffies;
1302 1205
1303 gl = gfs2_glock_find(sdp, name); 1206 gfs2_glock_hold(gl);
1304 if (!gl)
1305 return;
1306
1307 holdtime = gl->gl_tchange + gl->gl_ops->go_min_hold_time; 1207 holdtime = gl->gl_tchange + gl->gl_ops->go_min_hold_time;
1308 if (time_before(now, holdtime)) 1208 if (time_before(now, holdtime))
1309 delay = holdtime - now; 1209 delay = holdtime - now;
@@ -1317,74 +1217,37 @@ static void blocking_cb(struct gfs2_sbd *sdp, struct lm_lockname *name,
1317 gfs2_glock_put(gl); 1217 gfs2_glock_put(gl);
1318} 1218}
1319 1219
1320static void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid)
1321{
1322 struct gfs2_jdesc *jd;
1323
1324 spin_lock(&sdp->sd_jindex_spin);
1325 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
1326 if (jd->jd_jid != jid)
1327 continue;
1328 jd->jd_dirty = 1;
1329 break;
1330 }
1331 spin_unlock(&sdp->sd_jindex_spin);
1332}
1333
1334/** 1220/**
1335 * gfs2_glock_cb - Callback used by locking module 1221 * gfs2_glock_complete - Callback used by locking
1336 * @sdp: Pointer to the superblock 1222 * @gl: Pointer to the glock
1337 * @type: Type of callback 1223 * @ret: The return value from the dlm
1338 * @data: Type dependent data pointer
1339 * 1224 *
1340 * Called by the locking module when it wants to tell us something.
1341 * Either we need to drop a lock, one of our ASYNC requests completed, or
1342 * a journal from another client needs to be recovered.
1343 */ 1225 */
1344 1226
1345void gfs2_glock_cb(void *cb_data, unsigned int type, void *data) 1227void gfs2_glock_complete(struct gfs2_glock *gl, int ret)
1346{ 1228{
1347 struct gfs2_sbd *sdp = cb_data; 1229 struct lm_lockstruct *ls = &gl->gl_sbd->sd_lockstruct;
1348 1230 down_read(&gfs2_umount_flush_sem);
1349 switch (type) { 1231 gl->gl_reply = ret;
1350 case LM_CB_NEED_E: 1232 if (unlikely(test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))) {
1351 blocking_cb(sdp, data, LM_ST_UNLOCKED); 1233 struct gfs2_holder *gh;
1352 return; 1234 spin_lock(&gl->gl_spin);
1353 1235 gh = find_first_waiter(gl);
1354 case LM_CB_NEED_D: 1236 if ((!(gh && (gh->gh_flags & LM_FLAG_NOEXP)) &&
1355 blocking_cb(sdp, data, LM_ST_DEFERRED); 1237 (gl->gl_target != LM_ST_UNLOCKED)) ||
1356 return; 1238 ((ret & ~LM_OUT_ST_MASK) != 0))
1357 1239 set_bit(GLF_FROZEN, &gl->gl_flags);
1358 case LM_CB_NEED_S: 1240 spin_unlock(&gl->gl_spin);
1359 blocking_cb(sdp, data, LM_ST_SHARED); 1241 if (test_bit(GLF_FROZEN, &gl->gl_flags)) {
1360 return; 1242 up_read(&gfs2_umount_flush_sem);
1361
1362 case LM_CB_ASYNC: {
1363 struct lm_async_cb *async = data;
1364 struct gfs2_glock *gl;
1365
1366 down_read(&gfs2_umount_flush_sem);
1367 gl = gfs2_glock_find(sdp, &async->lc_name);
1368 if (gfs2_assert_warn(sdp, gl))
1369 return; 1243 return;
1370 gl->gl_reply = async->lc_ret; 1244 }
1371 set_bit(GLF_REPLY_PENDING, &gl->gl_flags);
1372 if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
1373 gfs2_glock_put(gl);
1374 up_read(&gfs2_umount_flush_sem);
1375 return;
1376 }
1377
1378 case LM_CB_NEED_RECOVERY:
1379 gfs2_jdesc_make_dirty(sdp, *(unsigned int *)data);
1380 if (sdp->sd_recoverd_process)
1381 wake_up_process(sdp->sd_recoverd_process);
1382 return;
1383
1384 default:
1385 gfs2_assert_warn(sdp, 0);
1386 return;
1387 } 1245 }
1246 set_bit(GLF_REPLY_PENDING, &gl->gl_flags);
1247 gfs2_glock_hold(gl);
1248 if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
1249 gfs2_glock_put(gl);
1250 up_read(&gfs2_umount_flush_sem);
1388} 1251}
1389 1252
1390/** 1253/**
@@ -1515,6 +1378,27 @@ out:
1515 return has_entries; 1378 return has_entries;
1516} 1379}
1517 1380
1381
1382/**
1383 * thaw_glock - thaw out a glock which has an unprocessed reply waiting
1384 * @gl: The glock to thaw
1385 *
1386 * N.B. When we freeze a glock, we leave a ref to the glock outstanding,
1387 * so this has to result in the ref count being dropped by one.
1388 */
1389
1390static void thaw_glock(struct gfs2_glock *gl)
1391{
1392 if (!test_and_clear_bit(GLF_FROZEN, &gl->gl_flags))
1393 return;
1394 down_read(&gfs2_umount_flush_sem);
1395 set_bit(GLF_REPLY_PENDING, &gl->gl_flags);
1396 gfs2_glock_hold(gl);
1397 if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
1398 gfs2_glock_put(gl);
1399 up_read(&gfs2_umount_flush_sem);
1400}
1401
1518/** 1402/**
1519 * clear_glock - look at a glock and see if we can free it from glock cache 1403 * clear_glock - look at a glock and see if we can free it from glock cache
1520 * @gl: the glock to look at 1404 * @gl: the glock to look at
@@ -1540,6 +1424,20 @@ static void clear_glock(struct gfs2_glock *gl)
1540} 1424}
1541 1425
1542/** 1426/**
1427 * gfs2_glock_thaw - Thaw any frozen glocks
1428 * @sdp: The super block
1429 *
1430 */
1431
1432void gfs2_glock_thaw(struct gfs2_sbd *sdp)
1433{
1434 unsigned x;
1435
1436 for (x = 0; x < GFS2_GL_HASH_SIZE; x++)
1437 examine_bucket(thaw_glock, sdp, x);
1438}
1439
1440/**
1543 * gfs2_gl_hash_clear - Empty out the glock hash table 1441 * gfs2_gl_hash_clear - Empty out the glock hash table
1544 * @sdp: the filesystem 1442 * @sdp: the filesystem
1545 * @wait: wait until it's all gone 1443 * @wait: wait until it's all gone
@@ -1619,7 +1517,7 @@ static const char *hflags2str(char *buf, unsigned flags, unsigned long iflags)
1619 if (flags & LM_FLAG_NOEXP) 1517 if (flags & LM_FLAG_NOEXP)
1620 *p++ = 'e'; 1518 *p++ = 'e';
1621 if (flags & LM_FLAG_ANY) 1519 if (flags & LM_FLAG_ANY)
1622 *p++ = 'a'; 1520 *p++ = 'A';
1623 if (flags & LM_FLAG_PRIORITY) 1521 if (flags & LM_FLAG_PRIORITY)
1624 *p++ = 'p'; 1522 *p++ = 'p';
1625 if (flags & GL_ASYNC) 1523 if (flags & GL_ASYNC)
@@ -1683,6 +1581,10 @@ static const char *gflags2str(char *buf, const unsigned long *gflags)
1683 *p++ = 'i'; 1581 *p++ = 'i';
1684 if (test_bit(GLF_REPLY_PENDING, gflags)) 1582 if (test_bit(GLF_REPLY_PENDING, gflags))
1685 *p++ = 'r'; 1583 *p++ = 'r';
1584 if (test_bit(GLF_INITIAL, gflags))
1585 *p++ = 'i';
1586 if (test_bit(GLF_FROZEN, gflags))
1587 *p++ = 'F';
1686 *p = 0; 1588 *p = 0;
1687 return buf; 1589 return buf;
1688} 1590}
@@ -1717,14 +1619,13 @@ static int __dump_glock(struct seq_file *seq, const struct gfs2_glock *gl)
1717 dtime *= 1000000/HZ; /* demote time in uSec */ 1619 dtime *= 1000000/HZ; /* demote time in uSec */
1718 if (!test_bit(GLF_DEMOTE, &gl->gl_flags)) 1620 if (!test_bit(GLF_DEMOTE, &gl->gl_flags))
1719 dtime = 0; 1621 dtime = 0;
1720 gfs2_print_dbg(seq, "G: s:%s n:%u/%llu f:%s t:%s d:%s/%llu l:%d a:%d r:%d\n", 1622 gfs2_print_dbg(seq, "G: s:%s n:%u/%llu f:%s t:%s d:%s/%llu a:%d r:%d\n",
1721 state2str(gl->gl_state), 1623 state2str(gl->gl_state),
1722 gl->gl_name.ln_type, 1624 gl->gl_name.ln_type,
1723 (unsigned long long)gl->gl_name.ln_number, 1625 (unsigned long long)gl->gl_name.ln_number,
1724 gflags2str(gflags_buf, &gl->gl_flags), 1626 gflags2str(gflags_buf, &gl->gl_flags),
1725 state2str(gl->gl_target), 1627 state2str(gl->gl_target),
1726 state2str(gl->gl_demote_state), dtime, 1628 state2str(gl->gl_demote_state), dtime,
1727 atomic_read(&gl->gl_lvb_count),
1728 atomic_read(&gl->gl_ail_count), 1629 atomic_read(&gl->gl_ail_count),
1729 atomic_read(&gl->gl_ref)); 1630 atomic_read(&gl->gl_ref));
1730 1631
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 543ec7ecfbda..a602a28f6f08 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -11,15 +11,130 @@
11#define __GLOCK_DOT_H__ 11#define __GLOCK_DOT_H__
12 12
13#include <linux/sched.h> 13#include <linux/sched.h>
14#include <linux/parser.h>
14#include "incore.h" 15#include "incore.h"
15 16
16/* Flags for lock requests; used in gfs2_holder gh_flag field. 17/* Options for hostdata parser */
17 From lm_interface.h: 18
19enum {
20 Opt_jid,
21 Opt_id,
22 Opt_first,
23 Opt_nodir,
24 Opt_err,
25};
26
27/*
28 * lm_lockname types
29 */
30
31#define LM_TYPE_RESERVED 0x00
32#define LM_TYPE_NONDISK 0x01
33#define LM_TYPE_INODE 0x02
34#define LM_TYPE_RGRP 0x03
35#define LM_TYPE_META 0x04
36#define LM_TYPE_IOPEN 0x05
37#define LM_TYPE_FLOCK 0x06
38#define LM_TYPE_PLOCK 0x07
39#define LM_TYPE_QUOTA 0x08
40#define LM_TYPE_JOURNAL 0x09
41
42/*
43 * lm_lock() states
44 *
45 * SHARED is compatible with SHARED, not with DEFERRED or EX.
46 * DEFERRED is compatible with DEFERRED, not with SHARED or EX.
47 */
48
49#define LM_ST_UNLOCKED 0
50#define LM_ST_EXCLUSIVE 1
51#define LM_ST_DEFERRED 2
52#define LM_ST_SHARED 3
53
54/*
55 * lm_lock() flags
56 *
57 * LM_FLAG_TRY
58 * Don't wait to acquire the lock if it can't be granted immediately.
59 *
60 * LM_FLAG_TRY_1CB
61 * Send one blocking callback if TRY is set and the lock is not granted.
62 *
63 * LM_FLAG_NOEXP
64 * GFS sets this flag on lock requests it makes while doing journal recovery.
65 * These special requests should not be blocked due to the recovery like
66 * ordinary locks would be.
67 *
68 * LM_FLAG_ANY
69 * A SHARED request may also be granted in DEFERRED, or a DEFERRED request may
70 * also be granted in SHARED. The preferred state is whichever is compatible
71 * with other granted locks, or the specified state if no other locks exist.
72 *
73 * LM_FLAG_PRIORITY
74 * Override fairness considerations. Suppose a lock is held in a shared state
75 * and there is a pending request for the deferred state. A shared lock
76 * request with the priority flag would be allowed to bypass the deferred
77 * request and directly join the other shared lock. A shared lock request
78 * without the priority flag might be forced to wait until the deferred
79 * requested had acquired and released the lock.
80 */
81
18#define LM_FLAG_TRY 0x00000001 82#define LM_FLAG_TRY 0x00000001
19#define LM_FLAG_TRY_1CB 0x00000002 83#define LM_FLAG_TRY_1CB 0x00000002
20#define LM_FLAG_NOEXP 0x00000004 84#define LM_FLAG_NOEXP 0x00000004
21#define LM_FLAG_ANY 0x00000008 85#define LM_FLAG_ANY 0x00000008
22#define LM_FLAG_PRIORITY 0x00000010 */ 86#define LM_FLAG_PRIORITY 0x00000010
87#define GL_ASYNC 0x00000040
88#define GL_EXACT 0x00000080
89#define GL_SKIP 0x00000100
90#define GL_ATIME 0x00000200
91#define GL_NOCACHE 0x00000400
92
93/*
94 * lm_lock() and lm_async_cb return flags
95 *
96 * LM_OUT_ST_MASK
97 * Masks the lower two bits of lock state in the returned value.
98 *
99 * LM_OUT_CANCELED
100 * The lock request was canceled.
101 *
102 * LM_OUT_ASYNC
103 * The result of the request will be returned in an LM_CB_ASYNC callback.
104 *
105 */
106
107#define LM_OUT_ST_MASK 0x00000003
108#define LM_OUT_CANCELED 0x00000008
109#define LM_OUT_ASYNC 0x00000080
110#define LM_OUT_ERROR 0x00000100
111
112/*
113 * lm_recovery_done() messages
114 */
115
116#define LM_RD_GAVEUP 308
117#define LM_RD_SUCCESS 309
118
119#define GLR_TRYFAILED 13
120
121struct lm_lockops {
122 const char *lm_proto_name;
123 int (*lm_mount) (struct gfs2_sbd *sdp, const char *fsname);
124 void (*lm_unmount) (struct gfs2_sbd *sdp);
125 void (*lm_withdraw) (struct gfs2_sbd *sdp);
126 void (*lm_put_lock) (struct kmem_cache *cachep, void *gl);
127 unsigned int (*lm_lock) (struct gfs2_glock *gl,
128 unsigned int req_state, unsigned int flags);
129 void (*lm_cancel) (struct gfs2_glock *gl);
130 const match_table_t *lm_tokens;
131};
132
133#define LM_FLAG_TRY 0x00000001
134#define LM_FLAG_TRY_1CB 0x00000002
135#define LM_FLAG_NOEXP 0x00000004
136#define LM_FLAG_ANY 0x00000008
137#define LM_FLAG_PRIORITY 0x00000010
23 138
24#define GL_ASYNC 0x00000040 139#define GL_ASYNC 0x00000040
25#define GL_EXACT 0x00000080 140#define GL_EXACT 0x00000080
@@ -128,10 +243,12 @@ static inline int gfs2_glock_nq_init(struct gfs2_glock *gl,
128int gfs2_lvb_hold(struct gfs2_glock *gl); 243int gfs2_lvb_hold(struct gfs2_glock *gl);
129void gfs2_lvb_unhold(struct gfs2_glock *gl); 244void gfs2_lvb_unhold(struct gfs2_glock *gl);
130 245
131void gfs2_glock_cb(void *cb_data, unsigned int type, void *data); 246void gfs2_glock_cb(struct gfs2_glock *gl, unsigned int state);
247void gfs2_glock_complete(struct gfs2_glock *gl, int ret);
132void gfs2_reclaim_glock(struct gfs2_sbd *sdp); 248void gfs2_reclaim_glock(struct gfs2_sbd *sdp);
133void gfs2_gl_hash_clear(struct gfs2_sbd *sdp); 249void gfs2_gl_hash_clear(struct gfs2_sbd *sdp);
134void gfs2_glock_finish_truncate(struct gfs2_inode *ip); 250void gfs2_glock_finish_truncate(struct gfs2_inode *ip);
251void gfs2_glock_thaw(struct gfs2_sbd *sdp);
135 252
136int __init gfs2_glock_init(void); 253int __init gfs2_glock_init(void);
137void gfs2_glock_exit(void); 254void gfs2_glock_exit(void);
@@ -141,4 +258,6 @@ void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
141int gfs2_register_debugfs(void); 258int gfs2_register_debugfs(void);
142void gfs2_unregister_debugfs(void); 259void gfs2_unregister_debugfs(void);
143 260
261extern const struct lm_lockops gfs2_dlm_ops;
262
144#endif /* __GLOCK_DOT_H__ */ 263#endif /* __GLOCK_DOT_H__ */
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 8522d3aa64fc..f07ede8cb9ba 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -12,7 +12,6 @@
12#include <linux/completion.h> 12#include <linux/completion.h>
13#include <linux/buffer_head.h> 13#include <linux/buffer_head.h>
14#include <linux/gfs2_ondisk.h> 14#include <linux/gfs2_ondisk.h>
15#include <linux/lm_interface.h>
16#include <linux/bio.h> 15#include <linux/bio.h>
17 16
18#include "gfs2.h" 17#include "gfs2.h"
@@ -390,18 +389,6 @@ static int trans_go_demote_ok(const struct gfs2_glock *gl)
390 return 0; 389 return 0;
391} 390}
392 391
393/**
394 * quota_go_demote_ok - Check to see if it's ok to unlock a quota glock
395 * @gl: the glock
396 *
397 * Returns: 1 if it's ok
398 */
399
400static int quota_go_demote_ok(const struct gfs2_glock *gl)
401{
402 return !atomic_read(&gl->gl_lvb_count);
403}
404
405const struct gfs2_glock_operations gfs2_meta_glops = { 392const struct gfs2_glock_operations gfs2_meta_glops = {
406 .go_xmote_th = meta_go_sync, 393 .go_xmote_th = meta_go_sync,
407 .go_type = LM_TYPE_META, 394 .go_type = LM_TYPE_META,
@@ -448,7 +435,6 @@ const struct gfs2_glock_operations gfs2_nondisk_glops = {
448}; 435};
449 436
450const struct gfs2_glock_operations gfs2_quota_glops = { 437const struct gfs2_glock_operations gfs2_quota_glops = {
451 .go_demote_ok = quota_go_demote_ok,
452 .go_type = LM_TYPE_QUOTA, 438 .go_type = LM_TYPE_QUOTA,
453}; 439};
454 440
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index a0117d6eb145..0af7c24de6a1 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -12,6 +12,8 @@
12 12
13#include <linux/fs.h> 13#include <linux/fs.h>
14#include <linux/workqueue.h> 14#include <linux/workqueue.h>
15#include <linux/dlm.h>
16#include <linux/buffer_head.h>
15 17
16#define DIO_WAIT 0x00000010 18#define DIO_WAIT 0x00000010
17#define DIO_METADATA 0x00000020 19#define DIO_METADATA 0x00000020
@@ -26,6 +28,7 @@ struct gfs2_trans;
26struct gfs2_ail; 28struct gfs2_ail;
27struct gfs2_jdesc; 29struct gfs2_jdesc;
28struct gfs2_sbd; 30struct gfs2_sbd;
31struct lm_lockops;
29 32
30typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret); 33typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);
31 34
@@ -121,6 +124,28 @@ struct gfs2_bufdata {
121 struct list_head bd_ail_gl_list; 124 struct list_head bd_ail_gl_list;
122}; 125};
123 126
127/*
128 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
129 * prefix of lock_dlm_ gets awkward.
130 */
131
132#define GDLM_STRNAME_BYTES 25
133#define GDLM_LVB_SIZE 32
134
135enum {
136 DFL_BLOCK_LOCKS = 0,
137};
138
139struct lm_lockname {
140 u64 ln_number;
141 unsigned int ln_type;
142};
143
144#define lm_name_equal(name1, name2) \
145 (((name1)->ln_number == (name2)->ln_number) && \
146 ((name1)->ln_type == (name2)->ln_type))
147
148
124struct gfs2_glock_operations { 149struct gfs2_glock_operations {
125 void (*go_xmote_th) (struct gfs2_glock *gl); 150 void (*go_xmote_th) (struct gfs2_glock *gl);
126 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh); 151 int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
@@ -162,6 +187,8 @@ enum {
162 GLF_LFLUSH = 7, 187 GLF_LFLUSH = 7,
163 GLF_INVALIDATE_IN_PROGRESS = 8, 188 GLF_INVALIDATE_IN_PROGRESS = 8,
164 GLF_REPLY_PENDING = 9, 189 GLF_REPLY_PENDING = 9,
190 GLF_INITIAL = 10,
191 GLF_FROZEN = 11,
165}; 192};
166 193
167struct gfs2_glock { 194struct gfs2_glock {
@@ -181,10 +208,9 @@ struct gfs2_glock {
181 struct list_head gl_holders; 208 struct list_head gl_holders;
182 209
183 const struct gfs2_glock_operations *gl_ops; 210 const struct gfs2_glock_operations *gl_ops;
184 void *gl_lock; 211 char gl_strname[GDLM_STRNAME_BYTES];
185 char *gl_lvb; 212 struct dlm_lksb gl_lksb;
186 atomic_t gl_lvb_count; 213 char gl_lvb[32];
187
188 unsigned long gl_stamp; 214 unsigned long gl_stamp;
189 unsigned long gl_tchange; 215 unsigned long gl_tchange;
190 void *gl_object; 216 void *gl_object;
@@ -447,6 +473,30 @@ struct gfs2_sb_host {
447 char sb_locktable[GFS2_LOCKNAME_LEN]; 473 char sb_locktable[GFS2_LOCKNAME_LEN];
448}; 474};
449 475
476/*
477 * lm_mount() return values
478 *
479 * ls_jid - the journal ID this node should use
480 * ls_first - this node is the first to mount the file system
481 * ls_lockspace - lock module's context for this file system
482 * ls_ops - lock module's functions
483 */
484
485struct lm_lockstruct {
486 u32 ls_id;
487 unsigned int ls_jid;
488 unsigned int ls_first;
489 unsigned int ls_first_done;
490 unsigned int ls_nodir;
491 const struct lm_lockops *ls_ops;
492 unsigned long ls_flags;
493 dlm_lockspace_t *ls_dlm;
494
495 int ls_recover_jid;
496 int ls_recover_jid_done;
497 int ls_recover_jid_status;
498};
499
450struct gfs2_sbd { 500struct gfs2_sbd {
451 struct super_block *sd_vfs; 501 struct super_block *sd_vfs;
452 struct kobject sd_kobj; 502 struct kobject sd_kobj;
@@ -520,7 +570,6 @@ struct gfs2_sbd {
520 spinlock_t sd_jindex_spin; 570 spinlock_t sd_jindex_spin;
521 struct mutex sd_jindex_mutex; 571 struct mutex sd_jindex_mutex;
522 unsigned int sd_journals; 572 unsigned int sd_journals;
523 unsigned long sd_jindex_refresh_time;
524 573
525 struct gfs2_jdesc *sd_jdesc; 574 struct gfs2_jdesc *sd_jdesc;
526 struct gfs2_holder sd_journal_gh; 575 struct gfs2_holder sd_journal_gh;
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 3b87c188da41..7b277d449155 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -16,7 +16,6 @@
16#include <linux/sort.h> 16#include <linux/sort.h>
17#include <linux/gfs2_ondisk.h> 17#include <linux/gfs2_ondisk.h>
18#include <linux/crc32.h> 18#include <linux/crc32.h>
19#include <linux/lm_interface.h>
20#include <linux/security.h> 19#include <linux/security.h>
21#include <linux/time.h> 20#include <linux/time.h>
22 21
@@ -137,16 +136,16 @@ void gfs2_set_iop(struct inode *inode)
137 136
138 if (S_ISREG(mode)) { 137 if (S_ISREG(mode)) {
139 inode->i_op = &gfs2_file_iops; 138 inode->i_op = &gfs2_file_iops;
140 if (sdp->sd_args.ar_localflocks) 139 if (gfs2_localflocks(sdp))
141 inode->i_fop = &gfs2_file_fops_nolock; 140 inode->i_fop = gfs2_file_fops_nolock;
142 else 141 else
143 inode->i_fop = &gfs2_file_fops; 142 inode->i_fop = gfs2_file_fops;
144 } else if (S_ISDIR(mode)) { 143 } else if (S_ISDIR(mode)) {
145 inode->i_op = &gfs2_dir_iops; 144 inode->i_op = &gfs2_dir_iops;
146 if (sdp->sd_args.ar_localflocks) 145 if (gfs2_localflocks(sdp))
147 inode->i_fop = &gfs2_dir_fops_nolock; 146 inode->i_fop = gfs2_dir_fops_nolock;
148 else 147 else
149 inode->i_fop = &gfs2_dir_fops; 148 inode->i_fop = gfs2_dir_fops;
150 } else if (S_ISLNK(mode)) { 149 } else if (S_ISLNK(mode)) {
151 inode->i_op = &gfs2_symlink_iops; 150 inode->i_op = &gfs2_symlink_iops;
152 } else { 151 } else {
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index d5329364cdff..dca4fee3078b 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -101,12 +101,26 @@ void gfs2_dinode_print(const struct gfs2_inode *ip);
101extern const struct inode_operations gfs2_file_iops; 101extern const struct inode_operations gfs2_file_iops;
102extern const struct inode_operations gfs2_dir_iops; 102extern const struct inode_operations gfs2_dir_iops;
103extern const struct inode_operations gfs2_symlink_iops; 103extern const struct inode_operations gfs2_symlink_iops;
104extern const struct file_operations gfs2_file_fops; 104extern const struct file_operations *gfs2_file_fops_nolock;
105extern const struct file_operations gfs2_dir_fops; 105extern const struct file_operations *gfs2_dir_fops_nolock;
106extern const struct file_operations gfs2_file_fops_nolock;
107extern const struct file_operations gfs2_dir_fops_nolock;
108 106
109extern void gfs2_set_inode_flags(struct inode *inode); 107extern void gfs2_set_inode_flags(struct inode *inode);
108
109#ifdef CONFIG_GFS2_FS_LOCKING_DLM
110extern const struct file_operations *gfs2_file_fops;
111extern const struct file_operations *gfs2_dir_fops;
112static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
113{
114 return sdp->sd_args.ar_localflocks;
115}
116#else /* Single node only */
117#define gfs2_file_fops NULL
118#define gfs2_dir_fops NULL
119static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
120{
121 return 1;
122}
123#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
110 124
111#endif /* __INODE_DOT_H__ */ 125#endif /* __INODE_DOT_H__ */
112 126
diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c
new file mode 100644
index 000000000000..a0bb7d2251a0
--- /dev/null
+++ b/fs/gfs2/lock_dlm.c
@@ -0,0 +1,240 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include <linux/fs.h>
11#include <linux/dlm.h>
12#include <linux/types.h>
13#include <linux/gfs2_ondisk.h>
14
15#include "incore.h"
16#include "glock.h"
17#include "util.h"
18
19
20static void gdlm_ast(void *arg)
21{
22 struct gfs2_glock *gl = arg;
23 unsigned ret = gl->gl_state;
24
25 BUG_ON(gl->gl_lksb.sb_flags & DLM_SBF_DEMOTED);
26
27 if (gl->gl_lksb.sb_flags & DLM_SBF_VALNOTVALID)
28 memset(gl->gl_lvb, 0, GDLM_LVB_SIZE);
29
30 switch (gl->gl_lksb.sb_status) {
31 case -DLM_EUNLOCK: /* Unlocked, so glock can be freed */
32 kmem_cache_free(gfs2_glock_cachep, gl);
33 return;
34 case -DLM_ECANCEL: /* Cancel while getting lock */
35 ret |= LM_OUT_CANCELED;
36 goto out;
37 case -EAGAIN: /* Try lock fails */
38 goto out;
39 case -EINVAL: /* Invalid */
40 case -ENOMEM: /* Out of memory */
41 ret |= LM_OUT_ERROR;
42 goto out;
43 case 0: /* Success */
44 break;
45 default: /* Something unexpected */
46 BUG();
47 }
48
49 ret = gl->gl_target;
50 if (gl->gl_lksb.sb_flags & DLM_SBF_ALTMODE) {
51 if (gl->gl_target == LM_ST_SHARED)
52 ret = LM_ST_DEFERRED;
53 else if (gl->gl_target == LM_ST_DEFERRED)
54 ret = LM_ST_SHARED;
55 else
56 BUG();
57 }
58
59 set_bit(GLF_INITIAL, &gl->gl_flags);
60 gfs2_glock_complete(gl, ret);
61 return;
62out:
63 if (!test_bit(GLF_INITIAL, &gl->gl_flags))
64 gl->gl_lksb.sb_lkid = 0;
65 gfs2_glock_complete(gl, ret);
66}
67
68static void gdlm_bast(void *arg, int mode)
69{
70 struct gfs2_glock *gl = arg;
71
72 switch (mode) {
73 case DLM_LOCK_EX:
74 gfs2_glock_cb(gl, LM_ST_UNLOCKED);
75 break;
76 case DLM_LOCK_CW:
77 gfs2_glock_cb(gl, LM_ST_DEFERRED);
78 break;
79 case DLM_LOCK_PR:
80 gfs2_glock_cb(gl, LM_ST_SHARED);
81 break;
82 default:
83 printk(KERN_ERR "unknown bast mode %d", mode);
84 BUG();
85 }
86}
87
88/* convert gfs lock-state to dlm lock-mode */
89
90static int make_mode(const unsigned int lmstate)
91{
92 switch (lmstate) {
93 case LM_ST_UNLOCKED:
94 return DLM_LOCK_NL;
95 case LM_ST_EXCLUSIVE:
96 return DLM_LOCK_EX;
97 case LM_ST_DEFERRED:
98 return DLM_LOCK_CW;
99 case LM_ST_SHARED:
100 return DLM_LOCK_PR;
101 }
102 printk(KERN_ERR "unknown LM state %d", lmstate);
103 BUG();
104 return -1;
105}
106
107static u32 make_flags(const u32 lkid, const unsigned int gfs_flags,
108 const int req)
109{
110 u32 lkf = 0;
111
112 if (gfs_flags & LM_FLAG_TRY)
113 lkf |= DLM_LKF_NOQUEUE;
114
115 if (gfs_flags & LM_FLAG_TRY_1CB) {
116 lkf |= DLM_LKF_NOQUEUE;
117 lkf |= DLM_LKF_NOQUEUEBAST;
118 }
119
120 if (gfs_flags & LM_FLAG_PRIORITY) {
121 lkf |= DLM_LKF_NOORDER;
122 lkf |= DLM_LKF_HEADQUE;
123 }
124
125 if (gfs_flags & LM_FLAG_ANY) {
126 if (req == DLM_LOCK_PR)
127 lkf |= DLM_LKF_ALTCW;
128 else if (req == DLM_LOCK_CW)
129 lkf |= DLM_LKF_ALTPR;
130 else
131 BUG();
132 }
133
134 if (lkid != 0)
135 lkf |= DLM_LKF_CONVERT;
136
137 lkf |= DLM_LKF_VALBLK;
138
139 return lkf;
140}
141
142static unsigned int gdlm_lock(struct gfs2_glock *gl,
143 unsigned int req_state, unsigned int flags)
144{
145 struct lm_lockstruct *ls = &gl->gl_sbd->sd_lockstruct;
146 int error;
147 int req;
148 u32 lkf;
149
150 req = make_mode(req_state);
151 lkf = make_flags(gl->gl_lksb.sb_lkid, flags, req);
152
153 /*
154 * Submit the actual lock request.
155 */
156
157 error = dlm_lock(ls->ls_dlm, req, &gl->gl_lksb, lkf, gl->gl_strname,
158 GDLM_STRNAME_BYTES - 1, 0, gdlm_ast, gl, gdlm_bast);
159 if (error == -EAGAIN)
160 return 0;
161 if (error)
162 return LM_OUT_ERROR;
163 return LM_OUT_ASYNC;
164}
165
166static void gdlm_put_lock(struct kmem_cache *cachep, void *ptr)
167{
168 struct gfs2_glock *gl = ptr;
169 struct lm_lockstruct *ls = &gl->gl_sbd->sd_lockstruct;
170 int error;
171
172 if (gl->gl_lksb.sb_lkid == 0) {
173 kmem_cache_free(cachep, gl);
174 return;
175 }
176
177 error = dlm_unlock(ls->ls_dlm, gl->gl_lksb.sb_lkid, DLM_LKF_VALBLK,
178 NULL, gl);
179 if (error) {
180 printk(KERN_ERR "gdlm_unlock %x,%llx err=%d\n",
181 gl->gl_name.ln_type,
182 (unsigned long long)gl->gl_name.ln_number, error);
183 return;
184 }
185}
186
187static void gdlm_cancel(struct gfs2_glock *gl)
188{
189 struct lm_lockstruct *ls = &gl->gl_sbd->sd_lockstruct;
190 dlm_unlock(ls->ls_dlm, gl->gl_lksb.sb_lkid, DLM_LKF_CANCEL, NULL, gl);
191}
192
193static int gdlm_mount(struct gfs2_sbd *sdp, const char *fsname)
194{
195 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
196 int error;
197
198 if (fsname == NULL) {
199 fs_info(sdp, "no fsname found\n");
200 return -EINVAL;
201 }
202
203 error = dlm_new_lockspace(fsname, strlen(fsname), &ls->ls_dlm,
204 DLM_LSFL_FS | DLM_LSFL_NEWEXCL |
205 (ls->ls_nodir ? DLM_LSFL_NODIR : 0),
206 GDLM_LVB_SIZE);
207 if (error)
208 printk(KERN_ERR "dlm_new_lockspace error %d", error);
209
210 return error;
211}
212
213static void gdlm_unmount(struct gfs2_sbd *sdp)
214{
215 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
216
217 if (ls->ls_dlm) {
218 dlm_release_lockspace(ls->ls_dlm, 2);
219 ls->ls_dlm = NULL;
220 }
221}
222
223static const match_table_t dlm_tokens = {
224 { Opt_jid, "jid=%d"},
225 { Opt_id, "id=%d"},
226 { Opt_first, "first=%d"},
227 { Opt_nodir, "nodir=%d"},
228 { Opt_err, NULL },
229};
230
231const struct lm_lockops gfs2_dlm_ops = {
232 .lm_proto_name = "lock_dlm",
233 .lm_mount = gdlm_mount,
234 .lm_unmount = gdlm_unmount,
235 .lm_put_lock = gdlm_put_lock,
236 .lm_lock = gdlm_lock,
237 .lm_cancel = gdlm_cancel,
238 .lm_tokens = &dlm_tokens,
239};
240
diff --git a/fs/gfs2/locking.c b/fs/gfs2/locking.c
deleted file mode 100644
index d3657bc7938a..000000000000
--- a/fs/gfs2/locking.c
+++ /dev/null
@@ -1,314 +0,0 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/string.h>
13#include <linux/slab.h>
14#include <linux/wait.h>
15#include <linux/sched.h>
16#include <linux/kmod.h>
17#include <linux/fs.h>
18#include <linux/delay.h>
19#include <linux/lm_interface.h>
20
21struct lmh_wrapper {
22 struct list_head lw_list;
23 const struct lm_lockops *lw_ops;
24};
25
26struct nolock_lockspace {
27 unsigned int nl_lvb_size;
28};
29
30/**
31 * nolock_get_lock - get a lm_lock_t given a descripton of the lock
32 * @lockspace: the lockspace the lock lives in
33 * @name: the name of the lock
34 * @lockp: return the lm_lock_t here
35 *
36 * Returns: 0 on success, -EXXX on failure
37 */
38
39static int nolock_get_lock(void *lockspace, struct lm_lockname *name,
40 void **lockp)
41{
42 *lockp = lockspace;
43 return 0;
44}
45
46/**
47 * nolock_put_lock - get rid of a lock structure
48 * @lock: the lock to throw away
49 *
50 */
51
52static void nolock_put_lock(void *lock)
53{
54}
55
56/**
57 * nolock_hold_lvb - hold on to a lock value block
58 * @lock: the lock the LVB is associated with
59 * @lvbp: return the lm_lvb_t here
60 *
61 * Returns: 0 on success, -EXXX on failure
62 */
63
64static int nolock_hold_lvb(void *lock, char **lvbp)
65{
66 struct nolock_lockspace *nl = lock;
67 int error = 0;
68
69 *lvbp = kzalloc(nl->nl_lvb_size, GFP_KERNEL);
70 if (!*lvbp)
71 error = -ENOMEM;
72
73 return error;
74}
75
76/**
77 * nolock_unhold_lvb - release a LVB
78 * @lock: the lock the LVB is associated with
79 * @lvb: the lock value block
80 *
81 */
82
83static void nolock_unhold_lvb(void *lock, char *lvb)
84{
85 kfree(lvb);
86}
87
88static int nolock_mount(char *table_name, char *host_data,
89 lm_callback_t cb, void *cb_data,
90 unsigned int min_lvb_size, int flags,
91 struct lm_lockstruct *lockstruct,
92 struct kobject *fskobj);
93static void nolock_unmount(void *lockspace);
94
95/* List of registered low-level locking protocols. A file system selects one
96 of them by name at mount time, e.g. lock_nolock, lock_dlm. */
97
98static const struct lm_lockops nolock_ops = {
99 .lm_proto_name = "lock_nolock",
100 .lm_mount = nolock_mount,
101 .lm_unmount = nolock_unmount,
102 .lm_get_lock = nolock_get_lock,
103 .lm_put_lock = nolock_put_lock,
104 .lm_hold_lvb = nolock_hold_lvb,
105 .lm_unhold_lvb = nolock_unhold_lvb,
106};
107
108static struct lmh_wrapper nolock_proto = {
109 .lw_list = LIST_HEAD_INIT(nolock_proto.lw_list),
110 .lw_ops = &nolock_ops,
111};
112
113static LIST_HEAD(lmh_list);
114static DEFINE_MUTEX(lmh_lock);
115
116static int nolock_mount(char *table_name, char *host_data,
117 lm_callback_t cb, void *cb_data,
118 unsigned int min_lvb_size, int flags,
119 struct lm_lockstruct *lockstruct,
120 struct kobject *fskobj)
121{
122 char *c;
123 unsigned int jid;
124 struct nolock_lockspace *nl;
125
126 c = strstr(host_data, "jid=");
127 if (!c)
128 jid = 0;
129 else {
130 c += 4;
131 sscanf(c, "%u", &jid);
132 }
133
134 nl = kzalloc(sizeof(struct nolock_lockspace), GFP_KERNEL);
135 if (!nl)
136 return -ENOMEM;
137
138 nl->nl_lvb_size = min_lvb_size;
139
140 lockstruct->ls_jid = jid;
141 lockstruct->ls_first = 1;
142 lockstruct->ls_lvb_size = min_lvb_size;
143 lockstruct->ls_lockspace = nl;
144 lockstruct->ls_ops = &nolock_ops;
145 lockstruct->ls_flags = LM_LSFLAG_LOCAL;
146
147 return 0;
148}
149
150static void nolock_unmount(void *lockspace)
151{
152 struct nolock_lockspace *nl = lockspace;
153 kfree(nl);
154}
155
156/**
157 * gfs2_register_lockproto - Register a low-level locking protocol
158 * @proto: the protocol definition
159 *
160 * Returns: 0 on success, -EXXX on failure
161 */
162
163int gfs2_register_lockproto(const struct lm_lockops *proto)
164{
165 struct lmh_wrapper *lw;
166
167 mutex_lock(&lmh_lock);
168
169 list_for_each_entry(lw, &lmh_list, lw_list) {
170 if (!strcmp(lw->lw_ops->lm_proto_name, proto->lm_proto_name)) {
171 mutex_unlock(&lmh_lock);
172 printk(KERN_INFO "GFS2: protocol %s already exists\n",
173 proto->lm_proto_name);
174 return -EEXIST;
175 }
176 }
177
178 lw = kzalloc(sizeof(struct lmh_wrapper), GFP_KERNEL);
179 if (!lw) {
180 mutex_unlock(&lmh_lock);
181 return -ENOMEM;
182 }
183
184 lw->lw_ops = proto;
185 list_add(&lw->lw_list, &lmh_list);
186
187 mutex_unlock(&lmh_lock);
188
189 return 0;
190}
191
192/**
193 * gfs2_unregister_lockproto - Unregister a low-level locking protocol
194 * @proto: the protocol definition
195 *
196 */
197
198void gfs2_unregister_lockproto(const struct lm_lockops *proto)
199{
200 struct lmh_wrapper *lw;
201
202 mutex_lock(&lmh_lock);
203
204 list_for_each_entry(lw, &lmh_list, lw_list) {
205 if (!strcmp(lw->lw_ops->lm_proto_name, proto->lm_proto_name)) {
206 list_del(&lw->lw_list);
207 mutex_unlock(&lmh_lock);
208 kfree(lw);
209 return;
210 }
211 }
212
213 mutex_unlock(&lmh_lock);
214
215 printk(KERN_WARNING "GFS2: can't unregister lock protocol %s\n",
216 proto->lm_proto_name);
217}
218
219/**
220 * gfs2_mount_lockproto - Mount a lock protocol
221 * @proto_name - the name of the protocol
222 * @table_name - the name of the lock space
223 * @host_data - data specific to this host
224 * @cb - the callback to the code using the lock module
225 * @sdp - The GFS2 superblock
226 * @min_lvb_size - the mininum LVB size that the caller can deal with
227 * @flags - LM_MFLAG_*
228 * @lockstruct - a structure returned describing the mount
229 *
230 * Returns: 0 on success, -EXXX on failure
231 */
232
233int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
234 lm_callback_t cb, void *cb_data,
235 unsigned int min_lvb_size, int flags,
236 struct lm_lockstruct *lockstruct,
237 struct kobject *fskobj)
238{
239 struct lmh_wrapper *lw = NULL;
240 int try = 0;
241 int error, found;
242
243
244retry:
245 mutex_lock(&lmh_lock);
246
247 if (list_empty(&nolock_proto.lw_list))
248 list_add(&nolock_proto.lw_list, &lmh_list);
249
250 found = 0;
251 list_for_each_entry(lw, &lmh_list, lw_list) {
252 if (!strcmp(lw->lw_ops->lm_proto_name, proto_name)) {
253 found = 1;
254 break;
255 }
256 }
257
258 if (!found) {
259 if (!try && capable(CAP_SYS_MODULE)) {
260 try = 1;
261 mutex_unlock(&lmh_lock);
262 request_module(proto_name);
263 goto retry;
264 }
265 printk(KERN_INFO "GFS2: can't find protocol %s\n", proto_name);
266 error = -ENOENT;
267 goto out;
268 }
269
270 if (lw->lw_ops->lm_owner &&
271 !try_module_get(lw->lw_ops->lm_owner)) {
272 try = 0;
273 mutex_unlock(&lmh_lock);
274 msleep(1000);
275 goto retry;
276 }
277
278 error = lw->lw_ops->lm_mount(table_name, host_data, cb, cb_data,
279 min_lvb_size, flags, lockstruct, fskobj);
280 if (error)
281 module_put(lw->lw_ops->lm_owner);
282out:
283 mutex_unlock(&lmh_lock);
284 return error;
285}
286
287void gfs2_unmount_lockproto(struct lm_lockstruct *lockstruct)
288{
289 mutex_lock(&lmh_lock);
290 if (lockstruct->ls_ops->lm_unmount)
291 lockstruct->ls_ops->lm_unmount(lockstruct->ls_lockspace);
292 if (lockstruct->ls_ops->lm_owner)
293 module_put(lockstruct->ls_ops->lm_owner);
294 mutex_unlock(&lmh_lock);
295}
296
297/**
298 * gfs2_withdraw_lockproto - abnormally unmount a lock module
299 * @lockstruct: the lockstruct passed into mount
300 *
301 */
302
303void gfs2_withdraw_lockproto(struct lm_lockstruct *lockstruct)
304{
305 mutex_lock(&lmh_lock);
306 lockstruct->ls_ops->lm_withdraw(lockstruct->ls_lockspace);
307 if (lockstruct->ls_ops->lm_owner)
308 module_put(lockstruct->ls_ops->lm_owner);
309 mutex_unlock(&lmh_lock);
310}
311
312EXPORT_SYMBOL_GPL(gfs2_register_lockproto);
313EXPORT_SYMBOL_GPL(gfs2_unregister_lockproto);
314
diff --git a/fs/gfs2/locking/dlm/Makefile b/fs/gfs2/locking/dlm/Makefile
deleted file mode 100644
index 2609bb6cd013..000000000000
--- a/fs/gfs2/locking/dlm/Makefile
+++ /dev/null
@@ -1,3 +0,0 @@
1obj-$(CONFIG_GFS2_FS_LOCKING_DLM) += lock_dlm.o
2lock_dlm-y := lock.o main.o mount.o sysfs.o thread.o
3
diff --git a/fs/gfs2/locking/dlm/lock.c b/fs/gfs2/locking/dlm/lock.c
deleted file mode 100644
index 2482c9047505..000000000000
--- a/fs/gfs2/locking/dlm/lock.c
+++ /dev/null
@@ -1,708 +0,0 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include "lock_dlm.h"
11
12static char junk_lvb[GDLM_LVB_SIZE];
13
14
15/* convert dlm lock-mode to gfs lock-state */
16
17static s16 gdlm_make_lmstate(s16 dlmmode)
18{
19 switch (dlmmode) {
20 case DLM_LOCK_IV:
21 case DLM_LOCK_NL:
22 return LM_ST_UNLOCKED;
23 case DLM_LOCK_EX:
24 return LM_ST_EXCLUSIVE;
25 case DLM_LOCK_CW:
26 return LM_ST_DEFERRED;
27 case DLM_LOCK_PR:
28 return LM_ST_SHARED;
29 }
30 gdlm_assert(0, "unknown DLM mode %d", dlmmode);
31 return -1;
32}
33
34/* A lock placed on this queue is re-submitted to DLM as soon as the lock_dlm
35 thread gets to it. */
36
37static void queue_submit(struct gdlm_lock *lp)
38{
39 struct gdlm_ls *ls = lp->ls;
40
41 spin_lock(&ls->async_lock);
42 list_add_tail(&lp->delay_list, &ls->submit);
43 spin_unlock(&ls->async_lock);
44 wake_up(&ls->thread_wait);
45}
46
47static void wake_up_ast(struct gdlm_lock *lp)
48{
49 clear_bit(LFL_AST_WAIT, &lp->flags);
50 smp_mb__after_clear_bit();
51 wake_up_bit(&lp->flags, LFL_AST_WAIT);
52}
53
54static void gdlm_delete_lp(struct gdlm_lock *lp)
55{
56 struct gdlm_ls *ls = lp->ls;
57
58 spin_lock(&ls->async_lock);
59 if (!list_empty(&lp->delay_list))
60 list_del_init(&lp->delay_list);
61 ls->all_locks_count--;
62 spin_unlock(&ls->async_lock);
63
64 kfree(lp);
65}
66
67static void gdlm_queue_delayed(struct gdlm_lock *lp)
68{
69 struct gdlm_ls *ls = lp->ls;
70
71 spin_lock(&ls->async_lock);
72 list_add_tail(&lp->delay_list, &ls->delayed);
73 spin_unlock(&ls->async_lock);
74}
75
76static void process_complete(struct gdlm_lock *lp)
77{
78 struct gdlm_ls *ls = lp->ls;
79 struct lm_async_cb acb;
80
81 memset(&acb, 0, sizeof(acb));
82
83 if (lp->lksb.sb_status == -DLM_ECANCEL) {
84 log_info("complete dlm cancel %x,%llx flags %lx",
85 lp->lockname.ln_type,
86 (unsigned long long)lp->lockname.ln_number,
87 lp->flags);
88
89 lp->req = lp->cur;
90 acb.lc_ret |= LM_OUT_CANCELED;
91 if (lp->cur == DLM_LOCK_IV)
92 lp->lksb.sb_lkid = 0;
93 goto out;
94 }
95
96 if (test_and_clear_bit(LFL_DLM_UNLOCK, &lp->flags)) {
97 if (lp->lksb.sb_status != -DLM_EUNLOCK) {
98 log_info("unlock sb_status %d %x,%llx flags %lx",
99 lp->lksb.sb_status, lp->lockname.ln_type,
100 (unsigned long long)lp->lockname.ln_number,
101 lp->flags);
102 return;
103 }
104
105 lp->cur = DLM_LOCK_IV;
106 lp->req = DLM_LOCK_IV;
107 lp->lksb.sb_lkid = 0;
108
109 if (test_and_clear_bit(LFL_UNLOCK_DELETE, &lp->flags)) {
110 gdlm_delete_lp(lp);
111 return;
112 }
113 goto out;
114 }
115
116 if (lp->lksb.sb_flags & DLM_SBF_VALNOTVALID)
117 memset(lp->lksb.sb_lvbptr, 0, GDLM_LVB_SIZE);
118
119 if (lp->lksb.sb_flags & DLM_SBF_ALTMODE) {
120 if (lp->req == DLM_LOCK_PR)
121 lp->req = DLM_LOCK_CW;
122 else if (lp->req == DLM_LOCK_CW)
123 lp->req = DLM_LOCK_PR;
124 }
125
126 /*
127 * A canceled lock request. The lock was just taken off the delayed
128 * list and was never even submitted to dlm.
129 */
130
131 if (test_and_clear_bit(LFL_CANCEL, &lp->flags)) {
132 log_info("complete internal cancel %x,%llx",
133 lp->lockname.ln_type,
134 (unsigned long long)lp->lockname.ln_number);
135 lp->req = lp->cur;
136 acb.lc_ret |= LM_OUT_CANCELED;
137 goto out;
138 }
139
140 /*
141 * An error occured.
142 */
143
144 if (lp->lksb.sb_status) {
145 /* a "normal" error */
146 if ((lp->lksb.sb_status == -EAGAIN) &&
147 (lp->lkf & DLM_LKF_NOQUEUE)) {
148 lp->req = lp->cur;
149 if (lp->cur == DLM_LOCK_IV)
150 lp->lksb.sb_lkid = 0;
151 goto out;
152 }
153
154 /* this could only happen with cancels I think */
155 log_info("ast sb_status %d %x,%llx flags %lx",
156 lp->lksb.sb_status, lp->lockname.ln_type,
157 (unsigned long long)lp->lockname.ln_number,
158 lp->flags);
159 return;
160 }
161
162 /*
163 * This is an AST for an EX->EX conversion for sync_lvb from GFS.
164 */
165
166 if (test_and_clear_bit(LFL_SYNC_LVB, &lp->flags)) {
167 wake_up_ast(lp);
168 return;
169 }
170
171 /*
172 * A lock has been demoted to NL because it initially completed during
173 * BLOCK_LOCKS. Now it must be requested in the originally requested
174 * mode.
175 */
176
177 if (test_and_clear_bit(LFL_REREQUEST, &lp->flags)) {
178 gdlm_assert(lp->req == DLM_LOCK_NL, "%x,%llx",
179 lp->lockname.ln_type,
180 (unsigned long long)lp->lockname.ln_number);
181 gdlm_assert(lp->prev_req > DLM_LOCK_NL, "%x,%llx",
182 lp->lockname.ln_type,
183 (unsigned long long)lp->lockname.ln_number);
184
185 lp->cur = DLM_LOCK_NL;
186 lp->req = lp->prev_req;
187 lp->prev_req = DLM_LOCK_IV;
188 lp->lkf &= ~DLM_LKF_CONVDEADLK;
189
190 set_bit(LFL_NOCACHE, &lp->flags);
191
192 if (test_bit(DFL_BLOCK_LOCKS, &ls->flags) &&
193 !test_bit(LFL_NOBLOCK, &lp->flags))
194 gdlm_queue_delayed(lp);
195 else
196 queue_submit(lp);
197 return;
198 }
199
200 /*
201 * A request is granted during dlm recovery. It may be granted
202 * because the locks of a failed node were cleared. In that case,
203 * there may be inconsistent data beneath this lock and we must wait
204 * for recovery to complete to use it. When gfs recovery is done this
205 * granted lock will be converted to NL and then reacquired in this
206 * granted state.
207 */
208
209 if (test_bit(DFL_BLOCK_LOCKS, &ls->flags) &&
210 !test_bit(LFL_NOBLOCK, &lp->flags) &&
211 lp->req != DLM_LOCK_NL) {
212
213 lp->cur = lp->req;
214 lp->prev_req = lp->req;
215 lp->req = DLM_LOCK_NL;
216 lp->lkf |= DLM_LKF_CONVERT;
217 lp->lkf &= ~DLM_LKF_CONVDEADLK;
218
219 log_debug("rereq %x,%llx id %x %d,%d",
220 lp->lockname.ln_type,
221 (unsigned long long)lp->lockname.ln_number,
222 lp->lksb.sb_lkid, lp->cur, lp->req);
223
224 set_bit(LFL_REREQUEST, &lp->flags);
225 queue_submit(lp);
226 return;
227 }
228
229 /*
230 * DLM demoted the lock to NL before it was granted so GFS must be
231 * told it cannot cache data for this lock.
232 */
233
234 if (lp->lksb.sb_flags & DLM_SBF_DEMOTED)
235 set_bit(LFL_NOCACHE, &lp->flags);
236
237out:
238 /*
239 * This is an internal lock_dlm lock
240 */
241
242 if (test_bit(LFL_INLOCK, &lp->flags)) {
243 clear_bit(LFL_NOBLOCK, &lp->flags);
244 lp->cur = lp->req;
245 wake_up_ast(lp);
246 return;
247 }
248
249 /*
250 * Normal completion of a lock request. Tell GFS it now has the lock.
251 */
252
253 clear_bit(LFL_NOBLOCK, &lp->flags);
254 lp->cur = lp->req;
255
256 acb.lc_name = lp->lockname;
257 acb.lc_ret |= gdlm_make_lmstate(lp->cur);
258
259 ls->fscb(ls->sdp, LM_CB_ASYNC, &acb);
260}
261
262static void gdlm_ast(void *astarg)
263{
264 struct gdlm_lock *lp = astarg;
265 clear_bit(LFL_ACTIVE, &lp->flags);
266 process_complete(lp);
267}
268
269static void process_blocking(struct gdlm_lock *lp, int bast_mode)
270{
271 struct gdlm_ls *ls = lp->ls;
272 unsigned int cb = 0;
273
274 switch (gdlm_make_lmstate(bast_mode)) {
275 case LM_ST_EXCLUSIVE:
276 cb = LM_CB_NEED_E;
277 break;
278 case LM_ST_DEFERRED:
279 cb = LM_CB_NEED_D;
280 break;
281 case LM_ST_SHARED:
282 cb = LM_CB_NEED_S;
283 break;
284 default:
285 gdlm_assert(0, "unknown bast mode %u", bast_mode);
286 }
287
288 ls->fscb(ls->sdp, cb, &lp->lockname);
289}
290
291
292static void gdlm_bast(void *astarg, int mode)
293{
294 struct gdlm_lock *lp = astarg;
295
296 if (!mode) {
297 printk(KERN_INFO "lock_dlm: bast mode zero %x,%llx\n",
298 lp->lockname.ln_type,
299 (unsigned long long)lp->lockname.ln_number);
300 return;
301 }
302
303 process_blocking(lp, mode);
304}
305
306/* convert gfs lock-state to dlm lock-mode */
307
308static s16 make_mode(s16 lmstate)
309{
310 switch (lmstate) {
311 case LM_ST_UNLOCKED:
312 return DLM_LOCK_NL;
313 case LM_ST_EXCLUSIVE:
314 return DLM_LOCK_EX;
315 case LM_ST_DEFERRED:
316 return DLM_LOCK_CW;
317 case LM_ST_SHARED:
318 return DLM_LOCK_PR;
319 }
320 gdlm_assert(0, "unknown LM state %d", lmstate);
321 return -1;
322}
323
324
325/* verify agreement with GFS on the current lock state, NB: DLM_LOCK_NL and
326 DLM_LOCK_IV are both considered LM_ST_UNLOCKED by GFS. */
327
328static void check_cur_state(struct gdlm_lock *lp, unsigned int cur_state)
329{
330 s16 cur = make_mode(cur_state);
331 if (lp->cur != DLM_LOCK_IV)
332 gdlm_assert(lp->cur == cur, "%d, %d", lp->cur, cur);
333}
334
335static inline unsigned int make_flags(struct gdlm_lock *lp,
336 unsigned int gfs_flags,
337 s16 cur, s16 req)
338{
339 unsigned int lkf = 0;
340
341 if (gfs_flags & LM_FLAG_TRY)
342 lkf |= DLM_LKF_NOQUEUE;
343
344 if (gfs_flags & LM_FLAG_TRY_1CB) {
345 lkf |= DLM_LKF_NOQUEUE;
346 lkf |= DLM_LKF_NOQUEUEBAST;
347 }
348
349 if (gfs_flags & LM_FLAG_PRIORITY) {
350 lkf |= DLM_LKF_NOORDER;
351 lkf |= DLM_LKF_HEADQUE;
352 }
353
354 if (gfs_flags & LM_FLAG_ANY) {
355 if (req == DLM_LOCK_PR)
356 lkf |= DLM_LKF_ALTCW;
357 else if (req == DLM_LOCK_CW)
358 lkf |= DLM_LKF_ALTPR;
359 }
360
361 if (lp->lksb.sb_lkid != 0) {
362 lkf |= DLM_LKF_CONVERT;
363 }
364
365 if (lp->lvb)
366 lkf |= DLM_LKF_VALBLK;
367
368 return lkf;
369}
370
371/* make_strname - convert GFS lock numbers to a string */
372
373static inline void make_strname(const struct lm_lockname *lockname,
374 struct gdlm_strname *str)
375{
376 sprintf(str->name, "%8x%16llx", lockname->ln_type,
377 (unsigned long long)lockname->ln_number);
378 str->namelen = GDLM_STRNAME_BYTES;
379}
380
381static int gdlm_create_lp(struct gdlm_ls *ls, struct lm_lockname *name,
382 struct gdlm_lock **lpp)
383{
384 struct gdlm_lock *lp;
385
386 lp = kzalloc(sizeof(struct gdlm_lock), GFP_NOFS);
387 if (!lp)
388 return -ENOMEM;
389
390 lp->lockname = *name;
391 make_strname(name, &lp->strname);
392 lp->ls = ls;
393 lp->cur = DLM_LOCK_IV;
394 INIT_LIST_HEAD(&lp->delay_list);
395
396 spin_lock(&ls->async_lock);
397 ls->all_locks_count++;
398 spin_unlock(&ls->async_lock);
399
400 *lpp = lp;
401 return 0;
402}
403
404int gdlm_get_lock(void *lockspace, struct lm_lockname *name,
405 void **lockp)
406{
407 struct gdlm_lock *lp;
408 int error;
409
410 error = gdlm_create_lp(lockspace, name, &lp);
411
412 *lockp = lp;
413 return error;
414}
415
416void gdlm_put_lock(void *lock)
417{
418 gdlm_delete_lp(lock);
419}
420
421unsigned int gdlm_do_lock(struct gdlm_lock *lp)
422{
423 struct gdlm_ls *ls = lp->ls;
424 int error, bast = 1;
425
426 /*
427 * When recovery is in progress, delay lock requests for submission
428 * once recovery is done. Requests for recovery (NOEXP) and unlocks
429 * can pass.
430 */
431
432 if (test_bit(DFL_BLOCK_LOCKS, &ls->flags) &&
433 !test_bit(LFL_NOBLOCK, &lp->flags) && lp->req != DLM_LOCK_NL) {
434 gdlm_queue_delayed(lp);
435 return LM_OUT_ASYNC;
436 }
437
438 /*
439 * Submit the actual lock request.
440 */
441
442 if (test_bit(LFL_NOBAST, &lp->flags))
443 bast = 0;
444
445 set_bit(LFL_ACTIVE, &lp->flags);
446
447 log_debug("lk %x,%llx id %x %d,%d %x", lp->lockname.ln_type,
448 (unsigned long long)lp->lockname.ln_number, lp->lksb.sb_lkid,
449 lp->cur, lp->req, lp->lkf);
450
451 error = dlm_lock(ls->dlm_lockspace, lp->req, &lp->lksb, lp->lkf,
452 lp->strname.name, lp->strname.namelen, 0, gdlm_ast,
453 lp, bast ? gdlm_bast : NULL);
454
455 if ((error == -EAGAIN) && (lp->lkf & DLM_LKF_NOQUEUE)) {
456 lp->lksb.sb_status = -EAGAIN;
457 gdlm_ast(lp);
458 error = 0;
459 }
460
461 if (error) {
462 log_error("%s: gdlm_lock %x,%llx err=%d cur=%d req=%d lkf=%x "
463 "flags=%lx", ls->fsname, lp->lockname.ln_type,
464 (unsigned long long)lp->lockname.ln_number, error,
465 lp->cur, lp->req, lp->lkf, lp->flags);
466 return LM_OUT_ERROR;
467 }
468 return LM_OUT_ASYNC;
469}
470
471static unsigned int gdlm_do_unlock(struct gdlm_lock *lp)
472{
473 struct gdlm_ls *ls = lp->ls;
474 unsigned int lkf = 0;
475 int error;
476
477 set_bit(LFL_DLM_UNLOCK, &lp->flags);
478 set_bit(LFL_ACTIVE, &lp->flags);
479
480 if (lp->lvb)
481 lkf = DLM_LKF_VALBLK;
482
483 log_debug("un %x,%llx %x %d %x", lp->lockname.ln_type,
484 (unsigned long long)lp->lockname.ln_number,
485 lp->lksb.sb_lkid, lp->cur, lkf);
486
487 error = dlm_unlock(ls->dlm_lockspace, lp->lksb.sb_lkid, lkf, NULL, lp);
488
489 if (error) {
490 log_error("%s: gdlm_unlock %x,%llx err=%d cur=%d req=%d lkf=%x "
491 "flags=%lx", ls->fsname, lp->lockname.ln_type,
492 (unsigned long long)lp->lockname.ln_number, error,
493 lp->cur, lp->req, lp->lkf, lp->flags);
494 return LM_OUT_ERROR;
495 }
496 return LM_OUT_ASYNC;
497}
498
499unsigned int gdlm_lock(void *lock, unsigned int cur_state,
500 unsigned int req_state, unsigned int flags)
501{
502 struct gdlm_lock *lp = lock;
503
504 if (req_state == LM_ST_UNLOCKED)
505 return gdlm_unlock(lock, cur_state);
506
507 if (req_state == LM_ST_UNLOCKED)
508 return gdlm_unlock(lock, cur_state);
509
510 clear_bit(LFL_DLM_CANCEL, &lp->flags);
511 if (flags & LM_FLAG_NOEXP)
512 set_bit(LFL_NOBLOCK, &lp->flags);
513
514 check_cur_state(lp, cur_state);
515 lp->req = make_mode(req_state);
516 lp->lkf = make_flags(lp, flags, lp->cur, lp->req);
517
518 return gdlm_do_lock(lp);
519}
520
521unsigned int gdlm_unlock(void *lock, unsigned int cur_state)
522{
523 struct gdlm_lock *lp = lock;
524
525 clear_bit(LFL_DLM_CANCEL, &lp->flags);
526 if (lp->cur == DLM_LOCK_IV)
527 return 0;
528 return gdlm_do_unlock(lp);
529}
530
531void gdlm_cancel(void *lock)
532{
533 struct gdlm_lock *lp = lock;
534 struct gdlm_ls *ls = lp->ls;
535 int error, delay_list = 0;
536
537 if (test_bit(LFL_DLM_CANCEL, &lp->flags))
538 return;
539
540 log_info("gdlm_cancel %x,%llx flags %lx", lp->lockname.ln_type,
541 (unsigned long long)lp->lockname.ln_number, lp->flags);
542
543 spin_lock(&ls->async_lock);
544 if (!list_empty(&lp->delay_list)) {
545 list_del_init(&lp->delay_list);
546 delay_list = 1;
547 }
548 spin_unlock(&ls->async_lock);
549
550 if (delay_list) {
551 set_bit(LFL_CANCEL, &lp->flags);
552 set_bit(LFL_ACTIVE, &lp->flags);
553 gdlm_ast(lp);
554 return;
555 }
556
557 if (!test_bit(LFL_ACTIVE, &lp->flags) ||
558 test_bit(LFL_DLM_UNLOCK, &lp->flags)) {
559 log_info("gdlm_cancel skip %x,%llx flags %lx",
560 lp->lockname.ln_type,
561 (unsigned long long)lp->lockname.ln_number, lp->flags);
562 return;
563 }
564
565 /* the lock is blocked in the dlm */
566
567 set_bit(LFL_DLM_CANCEL, &lp->flags);
568 set_bit(LFL_ACTIVE, &lp->flags);
569
570 error = dlm_unlock(ls->dlm_lockspace, lp->lksb.sb_lkid, DLM_LKF_CANCEL,
571 NULL, lp);
572
573 log_info("gdlm_cancel rv %d %x,%llx flags %lx", error,
574 lp->lockname.ln_type,
575 (unsigned long long)lp->lockname.ln_number, lp->flags);
576
577 if (error == -EBUSY)
578 clear_bit(LFL_DLM_CANCEL, &lp->flags);
579}
580
581static int gdlm_add_lvb(struct gdlm_lock *lp)
582{
583 char *lvb;
584
585 lvb = kzalloc(GDLM_LVB_SIZE, GFP_NOFS);
586 if (!lvb)
587 return -ENOMEM;
588
589 lp->lksb.sb_lvbptr = lvb;
590 lp->lvb = lvb;
591 return 0;
592}
593
594static void gdlm_del_lvb(struct gdlm_lock *lp)
595{
596 kfree(lp->lvb);
597 lp->lvb = NULL;
598 lp->lksb.sb_lvbptr = NULL;
599}
600
601static int gdlm_ast_wait(void *word)
602{
603 schedule();
604 return 0;
605}
606
607/* This can do a synchronous dlm request (requiring a lock_dlm thread to get
608 the completion) because gfs won't call hold_lvb() during a callback (from
609 the context of a lock_dlm thread). */
610
611static int hold_null_lock(struct gdlm_lock *lp)
612{
613 struct gdlm_lock *lpn = NULL;
614 int error;
615
616 if (lp->hold_null) {
617 printk(KERN_INFO "lock_dlm: lvb already held\n");
618 return 0;
619 }
620
621 error = gdlm_create_lp(lp->ls, &lp->lockname, &lpn);
622 if (error)
623 goto out;
624
625 lpn->lksb.sb_lvbptr = junk_lvb;
626 lpn->lvb = junk_lvb;
627
628 lpn->req = DLM_LOCK_NL;
629 lpn->lkf = DLM_LKF_VALBLK | DLM_LKF_EXPEDITE;
630 set_bit(LFL_NOBAST, &lpn->flags);
631 set_bit(LFL_INLOCK, &lpn->flags);
632 set_bit(LFL_AST_WAIT, &lpn->flags);
633
634 gdlm_do_lock(lpn);
635 wait_on_bit(&lpn->flags, LFL_AST_WAIT, gdlm_ast_wait, TASK_UNINTERRUPTIBLE);
636 error = lpn->lksb.sb_status;
637 if (error) {
638 printk(KERN_INFO "lock_dlm: hold_null_lock dlm error %d\n",
639 error);
640 gdlm_delete_lp(lpn);
641 lpn = NULL;
642 }
643out:
644 lp->hold_null = lpn;
645 return error;
646}
647
648/* This cannot do a synchronous dlm request (requiring a lock_dlm thread to get
649 the completion) because gfs may call unhold_lvb() during a callback (from
650 the context of a lock_dlm thread) which could cause a deadlock since the
651 other lock_dlm thread could be engaged in recovery. */
652
653static void unhold_null_lock(struct gdlm_lock *lp)
654{
655 struct gdlm_lock *lpn = lp->hold_null;
656
657 gdlm_assert(lpn, "%x,%llx", lp->lockname.ln_type,
658 (unsigned long long)lp->lockname.ln_number);
659 lpn->lksb.sb_lvbptr = NULL;
660 lpn->lvb = NULL;
661 set_bit(LFL_UNLOCK_DELETE, &lpn->flags);
662 gdlm_do_unlock(lpn);
663 lp->hold_null = NULL;
664}
665
666/* Acquire a NL lock because gfs requires the value block to remain
667 intact on the resource while the lvb is "held" even if it's holding no locks
668 on the resource. */
669
670int gdlm_hold_lvb(void *lock, char **lvbp)
671{
672 struct gdlm_lock *lp = lock;
673 int error;
674
675 error = gdlm_add_lvb(lp);
676 if (error)
677 return error;
678
679 *lvbp = lp->lvb;
680
681 error = hold_null_lock(lp);
682 if (error)
683 gdlm_del_lvb(lp);
684
685 return error;
686}
687
688void gdlm_unhold_lvb(void *lock, char *lvb)
689{
690 struct gdlm_lock *lp = lock;
691
692 unhold_null_lock(lp);
693 gdlm_del_lvb(lp);
694}
695
696void gdlm_submit_delayed(struct gdlm_ls *ls)
697{
698 struct gdlm_lock *lp, *safe;
699
700 spin_lock(&ls->async_lock);
701 list_for_each_entry_safe(lp, safe, &ls->delayed, delay_list) {
702 list_del_init(&lp->delay_list);
703 list_add_tail(&lp->delay_list, &ls->submit);
704 }
705 spin_unlock(&ls->async_lock);
706 wake_up(&ls->thread_wait);
707}
708
diff --git a/fs/gfs2/locking/dlm/lock_dlm.h b/fs/gfs2/locking/dlm/lock_dlm.h
deleted file mode 100644
index 3c98e7c6f93b..000000000000
--- a/fs/gfs2/locking/dlm/lock_dlm.h
+++ /dev/null
@@ -1,166 +0,0 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#ifndef LOCK_DLM_DOT_H
11#define LOCK_DLM_DOT_H
12
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/spinlock.h>
16#include <linux/types.h>
17#include <linux/string.h>
18#include <linux/list.h>
19#include <linux/socket.h>
20#include <linux/delay.h>
21#include <linux/kthread.h>
22#include <linux/kobject.h>
23#include <linux/fcntl.h>
24#include <linux/wait.h>
25#include <net/sock.h>
26
27#include <linux/dlm.h>
28#include <linux/dlm_plock.h>
29#include <linux/lm_interface.h>
30
31/*
32 * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
33 * prefix of lock_dlm_ gets awkward. Externally, GFS refers to this module
34 * as "lock_dlm".
35 */
36
37#define GDLM_STRNAME_BYTES 24
38#define GDLM_LVB_SIZE 32
39#define GDLM_DROP_COUNT 0
40#define GDLM_DROP_PERIOD 60
41#define GDLM_NAME_LEN 128
42
43/* GFS uses 12 bytes to identify a resource (32 bit type + 64 bit number).
44 We sprintf these numbers into a 24 byte string of hex values to make them
45 human-readable (to make debugging simpler.) */
46
47struct gdlm_strname {
48 unsigned char name[GDLM_STRNAME_BYTES];
49 unsigned short namelen;
50};
51
52enum {
53 DFL_BLOCK_LOCKS = 0,
54 DFL_SPECTATOR = 1,
55 DFL_WITHDRAW = 2,
56};
57
58struct gdlm_ls {
59 u32 id;
60 int jid;
61 int first;
62 int first_done;
63 unsigned long flags;
64 struct kobject kobj;
65 char clustername[GDLM_NAME_LEN];
66 char fsname[GDLM_NAME_LEN];
67 int fsflags;
68 dlm_lockspace_t *dlm_lockspace;
69 lm_callback_t fscb;
70 struct gfs2_sbd *sdp;
71 int recover_jid;
72 int recover_jid_done;
73 int recover_jid_status;
74 spinlock_t async_lock;
75 struct list_head delayed;
76 struct list_head submit;
77 u32 all_locks_count;
78 wait_queue_head_t wait_control;
79 struct task_struct *thread;
80 wait_queue_head_t thread_wait;
81};
82
83enum {
84 LFL_NOBLOCK = 0,
85 LFL_NOCACHE = 1,
86 LFL_DLM_UNLOCK = 2,
87 LFL_DLM_CANCEL = 3,
88 LFL_SYNC_LVB = 4,
89 LFL_FORCE_PROMOTE = 5,
90 LFL_REREQUEST = 6,
91 LFL_ACTIVE = 7,
92 LFL_INLOCK = 8,
93 LFL_CANCEL = 9,
94 LFL_NOBAST = 10,
95 LFL_HEADQUE = 11,
96 LFL_UNLOCK_DELETE = 12,
97 LFL_AST_WAIT = 13,
98};
99
100struct gdlm_lock {
101 struct gdlm_ls *ls;
102 struct lm_lockname lockname;
103 struct gdlm_strname strname;
104 char *lvb;
105 struct dlm_lksb lksb;
106
107 s16 cur;
108 s16 req;
109 s16 prev_req;
110 u32 lkf; /* dlm flags DLM_LKF_ */
111 unsigned long flags; /* lock_dlm flags LFL_ */
112
113 struct list_head delay_list; /* delayed */
114 struct gdlm_lock *hold_null; /* NL lock for hold_lvb */
115};
116
117#define gdlm_assert(assertion, fmt, args...) \
118do { \
119 if (unlikely(!(assertion))) { \
120 printk(KERN_EMERG "lock_dlm: fatal assertion failed \"%s\"\n" \
121 "lock_dlm: " fmt "\n", \
122 #assertion, ##args); \
123 BUG(); \
124 } \
125} while (0)
126
127#define log_print(lev, fmt, arg...) printk(lev "lock_dlm: " fmt "\n" , ## arg)
128#define log_info(fmt, arg...) log_print(KERN_INFO , fmt , ## arg)
129#define log_error(fmt, arg...) log_print(KERN_ERR , fmt , ## arg)
130#ifdef LOCK_DLM_LOG_DEBUG
131#define log_debug(fmt, arg...) log_print(KERN_DEBUG , fmt , ## arg)
132#else
133#define log_debug(fmt, arg...)
134#endif
135
136/* sysfs.c */
137
138int gdlm_sysfs_init(void);
139void gdlm_sysfs_exit(void);
140int gdlm_kobject_setup(struct gdlm_ls *, struct kobject *);
141void gdlm_kobject_release(struct gdlm_ls *);
142
143/* thread.c */
144
145int gdlm_init_threads(struct gdlm_ls *);
146void gdlm_release_threads(struct gdlm_ls *);
147
148/* lock.c */
149
150void gdlm_submit_delayed(struct gdlm_ls *);
151unsigned int gdlm_do_lock(struct gdlm_lock *);
152
153int gdlm_get_lock(void *, struct lm_lockname *, void **);
154void gdlm_put_lock(void *);
155unsigned int gdlm_lock(void *, unsigned int, unsigned int, unsigned int);
156unsigned int gdlm_unlock(void *, unsigned int);
157void gdlm_cancel(void *);
158int gdlm_hold_lvb(void *, char **);
159void gdlm_unhold_lvb(void *, char *);
160
161/* mount.c */
162
163extern const struct lm_lockops gdlm_ops;
164
165#endif
166
diff --git a/fs/gfs2/locking/dlm/main.c b/fs/gfs2/locking/dlm/main.c
deleted file mode 100644
index b9a03a7ff801..000000000000
--- a/fs/gfs2/locking/dlm/main.c
+++ /dev/null
@@ -1,48 +0,0 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include <linux/init.h>
11
12#include "lock_dlm.h"
13
14static int __init init_lock_dlm(void)
15{
16 int error;
17
18 error = gfs2_register_lockproto(&gdlm_ops);
19 if (error) {
20 printk(KERN_WARNING "lock_dlm: can't register protocol: %d\n",
21 error);
22 return error;
23 }
24
25 error = gdlm_sysfs_init();
26 if (error) {
27 gfs2_unregister_lockproto(&gdlm_ops);
28 return error;
29 }
30
31 printk(KERN_INFO
32 "Lock_DLM (built %s %s) installed\n", __DATE__, __TIME__);
33 return 0;
34}
35
36static void __exit exit_lock_dlm(void)
37{
38 gdlm_sysfs_exit();
39 gfs2_unregister_lockproto(&gdlm_ops);
40}
41
42module_init(init_lock_dlm);
43module_exit(exit_lock_dlm);
44
45MODULE_DESCRIPTION("GFS DLM Locking Module");
46MODULE_AUTHOR("Red Hat, Inc.");
47MODULE_LICENSE("GPL");
48
diff --git a/fs/gfs2/locking/dlm/mount.c b/fs/gfs2/locking/dlm/mount.c
deleted file mode 100644
index 1aa7eb6a0226..000000000000
--- a/fs/gfs2/locking/dlm/mount.c
+++ /dev/null
@@ -1,276 +0,0 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include "lock_dlm.h"
11
12const struct lm_lockops gdlm_ops;
13
14
15static struct gdlm_ls *init_gdlm(lm_callback_t cb, struct gfs2_sbd *sdp,
16 int flags, char *table_name)
17{
18 struct gdlm_ls *ls;
19 char buf[256], *p;
20
21 ls = kzalloc(sizeof(struct gdlm_ls), GFP_KERNEL);
22 if (!ls)
23 return NULL;
24
25 ls->fscb = cb;
26 ls->sdp = sdp;
27 ls->fsflags = flags;
28 spin_lock_init(&ls->async_lock);
29 INIT_LIST_HEAD(&ls->delayed);
30 INIT_LIST_HEAD(&ls->submit);
31 init_waitqueue_head(&ls->thread_wait);
32 init_waitqueue_head(&ls->wait_control);
33 ls->jid = -1;
34
35 strncpy(buf, table_name, 256);
36 buf[255] = '\0';
37
38 p = strchr(buf, ':');
39 if (!p) {
40 log_info("invalid table_name \"%s\"", table_name);
41 kfree(ls);
42 return NULL;
43 }
44 *p = '\0';
45 p++;
46
47 strncpy(ls->clustername, buf, GDLM_NAME_LEN);
48 strncpy(ls->fsname, p, GDLM_NAME_LEN);
49
50 return ls;
51}
52
53static int make_args(struct gdlm_ls *ls, char *data_arg, int *nodir)
54{
55 char data[256];
56 char *options, *x, *y;
57 int error = 0;
58
59 memset(data, 0, 256);
60 strncpy(data, data_arg, 255);
61
62 if (!strlen(data)) {
63 log_error("no mount options, (u)mount helpers not installed");
64 return -EINVAL;
65 }
66
67 for (options = data; (x = strsep(&options, ":")); ) {
68 if (!*x)
69 continue;
70
71 y = strchr(x, '=');
72 if (y)
73 *y++ = 0;
74
75 if (!strcmp(x, "jid")) {
76 if (!y) {
77 log_error("need argument to jid");
78 error = -EINVAL;
79 break;
80 }
81 sscanf(y, "%u", &ls->jid);
82
83 } else if (!strcmp(x, "first")) {
84 if (!y) {
85 log_error("need argument to first");
86 error = -EINVAL;
87 break;
88 }
89 sscanf(y, "%u", &ls->first);
90
91 } else if (!strcmp(x, "id")) {
92 if (!y) {
93 log_error("need argument to id");
94 error = -EINVAL;
95 break;
96 }
97 sscanf(y, "%u", &ls->id);
98
99 } else if (!strcmp(x, "nodir")) {
100 if (!y) {
101 log_error("need argument to nodir");
102 error = -EINVAL;
103 break;
104 }
105 sscanf(y, "%u", nodir);
106
107 } else {
108 log_error("unkonwn option: %s", x);
109 error = -EINVAL;
110 break;
111 }
112 }
113
114 return error;
115}
116
117static int gdlm_mount(char *table_name, char *host_data,
118 lm_callback_t cb, void *cb_data,
119 unsigned int min_lvb_size, int flags,
120 struct lm_lockstruct *lockstruct,
121 struct kobject *fskobj)
122{
123 struct gdlm_ls *ls;
124 int error = -ENOMEM, nodir = 0;
125
126 if (min_lvb_size > GDLM_LVB_SIZE)
127 goto out;
128
129 ls = init_gdlm(cb, cb_data, flags, table_name);
130 if (!ls)
131 goto out;
132
133 error = make_args(ls, host_data, &nodir);
134 if (error)
135 goto out;
136
137 error = gdlm_init_threads(ls);
138 if (error)
139 goto out_free;
140
141 error = gdlm_kobject_setup(ls, fskobj);
142 if (error)
143 goto out_thread;
144
145 error = dlm_new_lockspace(ls->fsname, strlen(ls->fsname),
146 &ls->dlm_lockspace,
147 DLM_LSFL_FS | DLM_LSFL_NEWEXCL |
148 (nodir ? DLM_LSFL_NODIR : 0),
149 GDLM_LVB_SIZE);
150 if (error) {
151 log_error("dlm_new_lockspace error %d", error);
152 goto out_kobj;
153 }
154
155 lockstruct->ls_jid = ls->jid;
156 lockstruct->ls_first = ls->first;
157 lockstruct->ls_lockspace = ls;
158 lockstruct->ls_ops = &gdlm_ops;
159 lockstruct->ls_flags = 0;
160 lockstruct->ls_lvb_size = GDLM_LVB_SIZE;
161 return 0;
162
163out_kobj:
164 gdlm_kobject_release(ls);
165out_thread:
166 gdlm_release_threads(ls);
167out_free:
168 kfree(ls);
169out:
170 return error;
171}
172
173static void gdlm_unmount(void *lockspace)
174{
175 struct gdlm_ls *ls = lockspace;
176
177 log_debug("unmount flags %lx", ls->flags);
178
179 /* FIXME: serialize unmount and withdraw in case they
180 happen at once. Also, if unmount follows withdraw,
181 wait for withdraw to finish. */
182
183 if (test_bit(DFL_WITHDRAW, &ls->flags))
184 goto out;
185
186 gdlm_kobject_release(ls);
187 dlm_release_lockspace(ls->dlm_lockspace, 2);
188 gdlm_release_threads(ls);
189 BUG_ON(ls->all_locks_count);
190out:
191 kfree(ls);
192}
193
194static void gdlm_recovery_done(void *lockspace, unsigned int jid,
195 unsigned int message)
196{
197 char env_jid[20];
198 char env_status[20];
199 char *envp[] = { env_jid, env_status, NULL };
200 struct gdlm_ls *ls = lockspace;
201 ls->recover_jid_done = jid;
202 ls->recover_jid_status = message;
203 sprintf(env_jid, "JID=%d", jid);
204 sprintf(env_status, "RECOVERY=%s",
205 message == LM_RD_SUCCESS ? "Done" : "Failed");
206 kobject_uevent_env(&ls->kobj, KOBJ_CHANGE, envp);
207}
208
209static void gdlm_others_may_mount(void *lockspace)
210{
211 char *message = "FIRSTMOUNT=Done";
212 char *envp[] = { message, NULL };
213 struct gdlm_ls *ls = lockspace;
214 ls->first_done = 1;
215 kobject_uevent_env(&ls->kobj, KOBJ_CHANGE, envp);
216}
217
218/* Userspace gets the offline uevent, blocks new gfs locks on
219 other mounters, and lets us know (sets WITHDRAW flag). Then,
220 userspace leaves the mount group while we leave the lockspace. */
221
222static void gdlm_withdraw(void *lockspace)
223{
224 struct gdlm_ls *ls = lockspace;
225
226 kobject_uevent(&ls->kobj, KOBJ_OFFLINE);
227
228 wait_event_interruptible(ls->wait_control,
229 test_bit(DFL_WITHDRAW, &ls->flags));
230
231 dlm_release_lockspace(ls->dlm_lockspace, 2);
232 gdlm_release_threads(ls);
233 gdlm_kobject_release(ls);
234}
235
236static int gdlm_plock(void *lockspace, struct lm_lockname *name,
237 struct file *file, int cmd, struct file_lock *fl)
238{
239 struct gdlm_ls *ls = lockspace;
240 return dlm_posix_lock(ls->dlm_lockspace, name->ln_number, file, cmd, fl);
241}
242
243static int gdlm_punlock(void *lockspace, struct lm_lockname *name,
244 struct file *file, struct file_lock *fl)
245{
246 struct gdlm_ls *ls = lockspace;
247 return dlm_posix_unlock(ls->dlm_lockspace, name->ln_number, file, fl);
248}
249
250static int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
251 struct file *file, struct file_lock *fl)
252{
253 struct gdlm_ls *ls = lockspace;
254 return dlm_posix_get(ls->dlm_lockspace, name->ln_number, file, fl);
255}
256
257const struct lm_lockops gdlm_ops = {
258 .lm_proto_name = "lock_dlm",
259 .lm_mount = gdlm_mount,
260 .lm_others_may_mount = gdlm_others_may_mount,
261 .lm_unmount = gdlm_unmount,
262 .lm_withdraw = gdlm_withdraw,
263 .lm_get_lock = gdlm_get_lock,
264 .lm_put_lock = gdlm_put_lock,
265 .lm_lock = gdlm_lock,
266 .lm_unlock = gdlm_unlock,
267 .lm_plock = gdlm_plock,
268 .lm_punlock = gdlm_punlock,
269 .lm_plock_get = gdlm_plock_get,
270 .lm_cancel = gdlm_cancel,
271 .lm_hold_lvb = gdlm_hold_lvb,
272 .lm_unhold_lvb = gdlm_unhold_lvb,
273 .lm_recovery_done = gdlm_recovery_done,
274 .lm_owner = THIS_MODULE,
275};
276
diff --git a/fs/gfs2/locking/dlm/sysfs.c b/fs/gfs2/locking/dlm/sysfs.c
deleted file mode 100644
index 9b7edcf7bd49..000000000000
--- a/fs/gfs2/locking/dlm/sysfs.c
+++ /dev/null
@@ -1,226 +0,0 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include <linux/ctype.h>
11#include <linux/stat.h>
12
13#include "lock_dlm.h"
14
15static ssize_t proto_name_show(struct gdlm_ls *ls, char *buf)
16{
17 return sprintf(buf, "%s\n", gdlm_ops.lm_proto_name);
18}
19
20static ssize_t block_show(struct gdlm_ls *ls, char *buf)
21{
22 ssize_t ret;
23 int val = 0;
24
25 if (test_bit(DFL_BLOCK_LOCKS, &ls->flags))
26 val = 1;
27 ret = sprintf(buf, "%d\n", val);
28 return ret;
29}
30
31static ssize_t block_store(struct gdlm_ls *ls, const char *buf, size_t len)
32{
33 ssize_t ret = len;
34 int val;
35
36 val = simple_strtol(buf, NULL, 0);
37
38 if (val == 1)
39 set_bit(DFL_BLOCK_LOCKS, &ls->flags);
40 else if (val == 0) {
41 clear_bit(DFL_BLOCK_LOCKS, &ls->flags);
42 gdlm_submit_delayed(ls);
43 } else {
44 ret = -EINVAL;
45 }
46 return ret;
47}
48
49static ssize_t withdraw_show(struct gdlm_ls *ls, char *buf)
50{
51 ssize_t ret;
52 int val = 0;
53
54 if (test_bit(DFL_WITHDRAW, &ls->flags))
55 val = 1;
56 ret = sprintf(buf, "%d\n", val);
57 return ret;
58}
59
60static ssize_t withdraw_store(struct gdlm_ls *ls, const char *buf, size_t len)
61{
62 ssize_t ret = len;
63 int val;
64
65 val = simple_strtol(buf, NULL, 0);
66
67 if (val == 1)
68 set_bit(DFL_WITHDRAW, &ls->flags);
69 else
70 ret = -EINVAL;
71 wake_up(&ls->wait_control);
72 return ret;
73}
74
75static ssize_t id_show(struct gdlm_ls *ls, char *buf)
76{
77 return sprintf(buf, "%u\n", ls->id);
78}
79
80static ssize_t jid_show(struct gdlm_ls *ls, char *buf)
81{
82 return sprintf(buf, "%d\n", ls->jid);
83}
84
85static ssize_t first_show(struct gdlm_ls *ls, char *buf)
86{
87 return sprintf(buf, "%d\n", ls->first);
88}
89
90static ssize_t first_done_show(struct gdlm_ls *ls, char *buf)
91{
92 return sprintf(buf, "%d\n", ls->first_done);
93}
94
95static ssize_t recover_show(struct gdlm_ls *ls, char *buf)
96{
97 return sprintf(buf, "%d\n", ls->recover_jid);
98}
99
100static ssize_t recover_store(struct gdlm_ls *ls, const char *buf, size_t len)
101{
102 ls->recover_jid = simple_strtol(buf, NULL, 0);
103 ls->fscb(ls->sdp, LM_CB_NEED_RECOVERY, &ls->recover_jid);
104 return len;
105}
106
107static ssize_t recover_done_show(struct gdlm_ls *ls, char *buf)
108{
109 return sprintf(buf, "%d\n", ls->recover_jid_done);
110}
111
112static ssize_t recover_status_show(struct gdlm_ls *ls, char *buf)
113{
114 return sprintf(buf, "%d\n", ls->recover_jid_status);
115}
116
117struct gdlm_attr {
118 struct attribute attr;
119 ssize_t (*show)(struct gdlm_ls *, char *);
120 ssize_t (*store)(struct gdlm_ls *, const char *, size_t);
121};
122
123#define GDLM_ATTR(_name,_mode,_show,_store) \
124static struct gdlm_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
125
126GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
127GDLM_ATTR(block, 0644, block_show, block_store);
128GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
129GDLM_ATTR(id, 0444, id_show, NULL);
130GDLM_ATTR(jid, 0444, jid_show, NULL);
131GDLM_ATTR(first, 0444, first_show, NULL);
132GDLM_ATTR(first_done, 0444, first_done_show, NULL);
133GDLM_ATTR(recover, 0644, recover_show, recover_store);
134GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
135GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
136
137static struct attribute *gdlm_attrs[] = {
138 &gdlm_attr_proto_name.attr,
139 &gdlm_attr_block.attr,
140 &gdlm_attr_withdraw.attr,
141 &gdlm_attr_id.attr,
142 &gdlm_attr_jid.attr,
143 &gdlm_attr_first.attr,
144 &gdlm_attr_first_done.attr,
145 &gdlm_attr_recover.attr,
146 &gdlm_attr_recover_done.attr,
147 &gdlm_attr_recover_status.attr,
148 NULL,
149};
150
151static ssize_t gdlm_attr_show(struct kobject *kobj, struct attribute *attr,
152 char *buf)
153{
154 struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
155 struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
156 return a->show ? a->show(ls, buf) : 0;
157}
158
159static ssize_t gdlm_attr_store(struct kobject *kobj, struct attribute *attr,
160 const char *buf, size_t len)
161{
162 struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
163 struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
164 return a->store ? a->store(ls, buf, len) : len;
165}
166
167static struct sysfs_ops gdlm_attr_ops = {
168 .show = gdlm_attr_show,
169 .store = gdlm_attr_store,
170};
171
172static struct kobj_type gdlm_ktype = {
173 .default_attrs = gdlm_attrs,
174 .sysfs_ops = &gdlm_attr_ops,
175};
176
177static struct kset *gdlm_kset;
178
179int gdlm_kobject_setup(struct gdlm_ls *ls, struct kobject *fskobj)
180{
181 int error;
182
183 ls->kobj.kset = gdlm_kset;
184 error = kobject_init_and_add(&ls->kobj, &gdlm_ktype, fskobj,
185 "lock_module");
186 if (error)
187 log_error("can't register kobj %d", error);
188 kobject_uevent(&ls->kobj, KOBJ_ADD);
189
190 return error;
191}
192
193void gdlm_kobject_release(struct gdlm_ls *ls)
194{
195 kobject_put(&ls->kobj);
196}
197
198static int gdlm_uevent(struct kset *kset, struct kobject *kobj,
199 struct kobj_uevent_env *env)
200{
201 struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
202 add_uevent_var(env, "LOCKTABLE=%s:%s", ls->clustername, ls->fsname);
203 add_uevent_var(env, "LOCKPROTO=lock_dlm");
204 return 0;
205}
206
207static struct kset_uevent_ops gdlm_uevent_ops = {
208 .uevent = gdlm_uevent,
209};
210
211
212int gdlm_sysfs_init(void)
213{
214 gdlm_kset = kset_create_and_add("lock_dlm", &gdlm_uevent_ops, kernel_kobj);
215 if (!gdlm_kset) {
216 printk(KERN_WARNING "%s: can not create kset\n", __func__);
217 return -ENOMEM;
218 }
219 return 0;
220}
221
222void gdlm_sysfs_exit(void)
223{
224 kset_unregister(gdlm_kset);
225}
226
diff --git a/fs/gfs2/locking/dlm/thread.c b/fs/gfs2/locking/dlm/thread.c
deleted file mode 100644
index 38823efd698c..000000000000
--- a/fs/gfs2/locking/dlm/thread.c
+++ /dev/null
@@ -1,68 +0,0 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include "lock_dlm.h"
11
12static inline int no_work(struct gdlm_ls *ls)
13{
14 int ret;
15
16 spin_lock(&ls->async_lock);
17 ret = list_empty(&ls->submit);
18 spin_unlock(&ls->async_lock);
19
20 return ret;
21}
22
23static int gdlm_thread(void *data)
24{
25 struct gdlm_ls *ls = (struct gdlm_ls *) data;
26 struct gdlm_lock *lp = NULL;
27
28 while (!kthread_should_stop()) {
29 wait_event_interruptible(ls->thread_wait,
30 !no_work(ls) || kthread_should_stop());
31
32 spin_lock(&ls->async_lock);
33
34 if (!list_empty(&ls->submit)) {
35 lp = list_entry(ls->submit.next, struct gdlm_lock,
36 delay_list);
37 list_del_init(&lp->delay_list);
38 spin_unlock(&ls->async_lock);
39 gdlm_do_lock(lp);
40 spin_lock(&ls->async_lock);
41 }
42 spin_unlock(&ls->async_lock);
43 }
44
45 return 0;
46}
47
48int gdlm_init_threads(struct gdlm_ls *ls)
49{
50 struct task_struct *p;
51 int error;
52
53 p = kthread_run(gdlm_thread, ls, "lock_dlm");
54 error = IS_ERR(p);
55 if (error) {
56 log_error("can't start lock_dlm thread %d", error);
57 return error;
58 }
59 ls->thread = p;
60
61 return 0;
62}
63
64void gdlm_release_threads(struct gdlm_ls *ls)
65{
66 kthread_stop(ls->thread);
67}
68
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index ad305854bdc6..98918a756410 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -14,7 +14,6 @@
14#include <linux/buffer_head.h> 14#include <linux/buffer_head.h>
15#include <linux/gfs2_ondisk.h> 15#include <linux/gfs2_ondisk.h>
16#include <linux/crc32.h> 16#include <linux/crc32.h>
17#include <linux/lm_interface.h>
18#include <linux/delay.h> 17#include <linux/delay.h>
19#include <linux/kthread.h> 18#include <linux/kthread.h>
20#include <linux/freezer.h> 19#include <linux/freezer.h>
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 4390f6f4047d..80e4f5f898bb 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -13,7 +13,6 @@
13#include <linux/completion.h> 13#include <linux/completion.h>
14#include <linux/buffer_head.h> 14#include <linux/buffer_head.h>
15#include <linux/gfs2_ondisk.h> 15#include <linux/gfs2_ondisk.h>
16#include <linux/lm_interface.h>
17 16
18#include "gfs2.h" 17#include "gfs2.h"
19#include "incore.h" 18#include "incore.h"
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index 86fe06798711..a6892ed0840a 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -14,7 +14,6 @@
14#include <linux/module.h> 14#include <linux/module.h>
15#include <linux/init.h> 15#include <linux/init.h>
16#include <linux/gfs2_ondisk.h> 16#include <linux/gfs2_ondisk.h>
17#include <linux/lm_interface.h>
18#include <asm/atomic.h> 17#include <asm/atomic.h>
19 18
20#include "gfs2.h" 19#include "gfs2.h"
@@ -47,8 +46,6 @@ static void gfs2_init_glock_once(void *foo)
47 INIT_HLIST_NODE(&gl->gl_list); 46 INIT_HLIST_NODE(&gl->gl_list);
48 spin_lock_init(&gl->gl_spin); 47 spin_lock_init(&gl->gl_spin);
49 INIT_LIST_HEAD(&gl->gl_holders); 48 INIT_LIST_HEAD(&gl->gl_holders);
50 gl->gl_lvb = NULL;
51 atomic_set(&gl->gl_lvb_count, 0);
52 INIT_LIST_HEAD(&gl->gl_lru); 49 INIT_LIST_HEAD(&gl->gl_lru);
53 INIT_LIST_HEAD(&gl->gl_ail_list); 50 INIT_LIST_HEAD(&gl->gl_ail_list);
54 atomic_set(&gl->gl_ail_count, 0); 51 atomic_set(&gl->gl_ail_count, 0);
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 09853620c951..870d65ae7ae2 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -19,7 +19,6 @@
19#include <linux/delay.h> 19#include <linux/delay.h>
20#include <linux/bio.h> 20#include <linux/bio.h>
21#include <linux/gfs2_ondisk.h> 21#include <linux/gfs2_ondisk.h>
22#include <linux/lm_interface.h>
23 22
24#include "gfs2.h" 23#include "gfs2.h"
25#include "incore.h" 24#include "incore.h"
diff --git a/fs/gfs2/mount.c b/fs/gfs2/mount.c
index 3524ae81189b..fba502aa8b2d 100644
--- a/fs/gfs2/mount.c
+++ b/fs/gfs2/mount.c
@@ -12,7 +12,6 @@
12#include <linux/completion.h> 12#include <linux/completion.h>
13#include <linux/buffer_head.h> 13#include <linux/buffer_head.h>
14#include <linux/gfs2_ondisk.h> 14#include <linux/gfs2_ondisk.h>
15#include <linux/lm_interface.h>
16#include <linux/parser.h> 15#include <linux/parser.h>
17 16
18#include "gfs2.h" 17#include "gfs2.h"
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index dde4ead2c3be..a6d00e8ffe10 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -19,7 +19,6 @@
19#include <linux/writeback.h> 19#include <linux/writeback.h>
20#include <linux/swap.h> 20#include <linux/swap.h>
21#include <linux/gfs2_ondisk.h> 21#include <linux/gfs2_ondisk.h>
22#include <linux/lm_interface.h>
23#include <linux/backing-dev.h> 22#include <linux/backing-dev.h>
24 23
25#include "gfs2.h" 24#include "gfs2.h"
diff --git a/fs/gfs2/ops_dentry.c b/fs/gfs2/ops_dentry.c
index c2ad36330ca3..5eb57b044382 100644
--- a/fs/gfs2/ops_dentry.c
+++ b/fs/gfs2/ops_dentry.c
@@ -13,7 +13,6 @@
13#include <linux/buffer_head.h> 13#include <linux/buffer_head.h>
14#include <linux/gfs2_ondisk.h> 14#include <linux/gfs2_ondisk.h>
15#include <linux/crc32.h> 15#include <linux/crc32.h>
16#include <linux/lm_interface.h>
17 16
18#include "gfs2.h" 17#include "gfs2.h"
19#include "incore.h" 18#include "incore.h"
diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index 7fdeb14ddd1a..9200ef221716 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -14,7 +14,6 @@
14#include <linux/exportfs.h> 14#include <linux/exportfs.h>
15#include <linux/gfs2_ondisk.h> 15#include <linux/gfs2_ondisk.h>
16#include <linux/crc32.h> 16#include <linux/crc32.h>
17#include <linux/lm_interface.h>
18 17
19#include "gfs2.h" 18#include "gfs2.h"
20#include "incore.h" 19#include "incore.h"
diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index 93fe41b67f97..99d726f1c7a6 100644
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -20,9 +20,10 @@
20#include <linux/gfs2_ondisk.h> 20#include <linux/gfs2_ondisk.h>
21#include <linux/ext2_fs.h> 21#include <linux/ext2_fs.h>
22#include <linux/crc32.h> 22#include <linux/crc32.h>
23#include <linux/lm_interface.h>
24#include <linux/writeback.h> 23#include <linux/writeback.h>
25#include <asm/uaccess.h> 24#include <asm/uaccess.h>
25#include <linux/dlm.h>
26#include <linux/dlm_plock.h>
26 27
27#include "gfs2.h" 28#include "gfs2.h"
28#include "incore.h" 29#include "incore.h"
@@ -560,57 +561,24 @@ static int gfs2_fsync(struct file *file, struct dentry *dentry, int datasync)
560 return ret; 561 return ret;
561} 562}
562 563
564#ifdef CONFIG_GFS2_FS_LOCKING_DLM
565
563/** 566/**
564 * gfs2_setlease - acquire/release a file lease 567 * gfs2_setlease - acquire/release a file lease
565 * @file: the file pointer 568 * @file: the file pointer
566 * @arg: lease type 569 * @arg: lease type
567 * @fl: file lock 570 * @fl: file lock
568 * 571 *
572 * We don't currently have a way to enforce a lease across the whole
573 * cluster; until we do, disable leases (by just returning -EINVAL),
574 * unless the administrator has requested purely local locking.
575 *
569 * Returns: errno 576 * Returns: errno
570 */ 577 */
571 578
572static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl) 579static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl)
573{ 580{
574 struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); 581 return -EINVAL;
575
576 /*
577 * We don't currently have a way to enforce a lease across the whole
578 * cluster; until we do, disable leases (by just returning -EINVAL),
579 * unless the administrator has requested purely local locking.
580 */
581 if (!sdp->sd_args.ar_localflocks)
582 return -EINVAL;
583 return generic_setlease(file, arg, fl);
584}
585
586static int gfs2_lm_plock_get(struct gfs2_sbd *sdp, struct lm_lockname *name,
587 struct file *file, struct file_lock *fl)
588{
589 int error = -EIO;
590 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
591 error = sdp->sd_lockstruct.ls_ops->lm_plock_get(
592 sdp->sd_lockstruct.ls_lockspace, name, file, fl);
593 return error;
594}
595
596static int gfs2_lm_plock(struct gfs2_sbd *sdp, struct lm_lockname *name,
597 struct file *file, int cmd, struct file_lock *fl)
598{
599 int error = -EIO;
600 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
601 error = sdp->sd_lockstruct.ls_ops->lm_plock(
602 sdp->sd_lockstruct.ls_lockspace, name, file, cmd, fl);
603 return error;
604}
605
606static int gfs2_lm_punlock(struct gfs2_sbd *sdp, struct lm_lockname *name,
607 struct file *file, struct file_lock *fl)
608{
609 int error = -EIO;
610 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
611 error = sdp->sd_lockstruct.ls_ops->lm_punlock(
612 sdp->sd_lockstruct.ls_lockspace, name, file, fl);
613 return error;
614} 582}
615 583
616/** 584/**
@@ -626,9 +594,7 @@ static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
626{ 594{
627 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host); 595 struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
628 struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host); 596 struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
629 struct lm_lockname name = 597 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
630 { .ln_number = ip->i_no_addr,
631 .ln_type = LM_TYPE_PLOCK };
632 598
633 if (!(fl->fl_flags & FL_POSIX)) 599 if (!(fl->fl_flags & FL_POSIX))
634 return -ENOLCK; 600 return -ENOLCK;
@@ -640,12 +606,14 @@ static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
640 cmd = F_SETLK; 606 cmd = F_SETLK;
641 fl->fl_type = F_UNLCK; 607 fl->fl_type = F_UNLCK;
642 } 608 }
609 if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
610 return -EIO;
643 if (IS_GETLK(cmd)) 611 if (IS_GETLK(cmd))
644 return gfs2_lm_plock_get(sdp, &name, file, fl); 612 return dlm_posix_get(ls->ls_dlm, ip->i_no_addr, file, fl);
645 else if (fl->fl_type == F_UNLCK) 613 else if (fl->fl_type == F_UNLCK)
646 return gfs2_lm_punlock(sdp, &name, file, fl); 614 return dlm_posix_unlock(ls->ls_dlm, ip->i_no_addr, file, fl);
647 else 615 else
648 return gfs2_lm_plock(sdp, &name, file, cmd, fl); 616 return dlm_posix_lock(ls->ls_dlm, ip->i_no_addr, file, cmd, fl);
649} 617}
650 618
651static int do_flock(struct file *file, int cmd, struct file_lock *fl) 619static int do_flock(struct file *file, int cmd, struct file_lock *fl)
@@ -732,7 +700,7 @@ static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
732 } 700 }
733} 701}
734 702
735const struct file_operations gfs2_file_fops = { 703const struct file_operations *gfs2_file_fops = &(const struct file_operations){
736 .llseek = gfs2_llseek, 704 .llseek = gfs2_llseek,
737 .read = do_sync_read, 705 .read = do_sync_read,
738 .aio_read = generic_file_aio_read, 706 .aio_read = generic_file_aio_read,
@@ -750,7 +718,7 @@ const struct file_operations gfs2_file_fops = {
750 .setlease = gfs2_setlease, 718 .setlease = gfs2_setlease,
751}; 719};
752 720
753const struct file_operations gfs2_dir_fops = { 721const struct file_operations *gfs2_dir_fops = &(const struct file_operations){
754 .readdir = gfs2_readdir, 722 .readdir = gfs2_readdir,
755 .unlocked_ioctl = gfs2_ioctl, 723 .unlocked_ioctl = gfs2_ioctl,
756 .open = gfs2_open, 724 .open = gfs2_open,
@@ -760,7 +728,9 @@ const struct file_operations gfs2_dir_fops = {
760 .flock = gfs2_flock, 728 .flock = gfs2_flock,
761}; 729};
762 730
763const struct file_operations gfs2_file_fops_nolock = { 731#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
732
733const struct file_operations *gfs2_file_fops_nolock = &(const struct file_operations){
764 .llseek = gfs2_llseek, 734 .llseek = gfs2_llseek,
765 .read = do_sync_read, 735 .read = do_sync_read,
766 .aio_read = generic_file_aio_read, 736 .aio_read = generic_file_aio_read,
@@ -773,10 +743,10 @@ const struct file_operations gfs2_file_fops_nolock = {
773 .fsync = gfs2_fsync, 743 .fsync = gfs2_fsync,
774 .splice_read = generic_file_splice_read, 744 .splice_read = generic_file_splice_read,
775 .splice_write = generic_file_splice_write, 745 .splice_write = generic_file_splice_write,
776 .setlease = gfs2_setlease, 746 .setlease = generic_setlease,
777}; 747};
778 748
779const struct file_operations gfs2_dir_fops_nolock = { 749const struct file_operations *gfs2_dir_fops_nolock = &(const struct file_operations){
780 .readdir = gfs2_readdir, 750 .readdir = gfs2_readdir,
781 .unlocked_ioctl = gfs2_ioctl, 751 .unlocked_ioctl = gfs2_ioctl,
782 .open = gfs2_open, 752 .open = gfs2_open,
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 402b6a2cd2c9..95bb33e41a76 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -17,7 +17,6 @@
17#include <linux/namei.h> 17#include <linux/namei.h>
18#include <linux/mount.h> 18#include <linux/mount.h>
19#include <linux/gfs2_ondisk.h> 19#include <linux/gfs2_ondisk.h>
20#include <linux/lm_interface.h>
21 20
22#include "gfs2.h" 21#include "gfs2.h"
23#include "incore.h" 22#include "incore.h"
@@ -627,13 +626,13 @@ static int map_journal_extents(struct gfs2_sbd *sdp)
627 return rc; 626 return rc;
628} 627}
629 628
630static void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp) 629static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
631{ 630{
632 if (!sdp->sd_lockstruct.ls_ops->lm_others_may_mount) 631 char *message = "FIRSTMOUNT=Done";
633 return; 632 char *envp[] = { message, NULL };
634 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) 633 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
635 sdp->sd_lockstruct.ls_ops->lm_others_may_mount( 634 ls->ls_first_done = 1;
636 sdp->sd_lockstruct.ls_lockspace); 635 kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
637} 636}
638 637
639/** 638/**
@@ -793,7 +792,7 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
793 } 792 }
794 } 793 }
795 794
796 gfs2_lm_others_may_mount(sdp); 795 gfs2_others_may_mount(sdp);
797 } else if (!sdp->sd_args.ar_spectator) { 796 } else if (!sdp->sd_args.ar_spectator) {
798 error = gfs2_recover_journal(sdp->sd_jdesc); 797 error = gfs2_recover_journal(sdp->sd_jdesc);
799 if (error) { 798 if (error) {
@@ -1002,7 +1001,6 @@ static int init_threads(struct gfs2_sbd *sdp, int undo)
1002 goto fail_quotad; 1001 goto fail_quotad;
1003 1002
1004 sdp->sd_log_flush_time = jiffies; 1003 sdp->sd_log_flush_time = jiffies;
1005 sdp->sd_jindex_refresh_time = jiffies;
1006 1004
1007 p = kthread_run(gfs2_logd, sdp, "gfs2_logd"); 1005 p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
1008 error = IS_ERR(p); 1006 error = IS_ERR(p);
@@ -1030,6 +1028,17 @@ fail:
1030 return error; 1028 return error;
1031} 1029}
1032 1030
1031static const match_table_t nolock_tokens = {
1032 { Opt_jid, "jid=%d\n", },
1033 { Opt_err, NULL },
1034};
1035
1036static const struct lm_lockops nolock_ops = {
1037 .lm_proto_name = "lock_nolock",
1038 .lm_put_lock = kmem_cache_free,
1039 .lm_tokens = &nolock_tokens,
1040};
1041
1033/** 1042/**
1034 * gfs2_lm_mount - mount a locking protocol 1043 * gfs2_lm_mount - mount a locking protocol
1035 * @sdp: the filesystem 1044 * @sdp: the filesystem
@@ -1041,31 +1050,73 @@ fail:
1041 1050
1042static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) 1051static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
1043{ 1052{
1044 char *proto = sdp->sd_proto_name; 1053 const struct lm_lockops *lm;
1045 char *table = sdp->sd_table_name; 1054 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
1046 int flags = LM_MFLAG_CONV_NODROP; 1055 struct gfs2_args *args = &sdp->sd_args;
1047 int error; 1056 const char *proto = sdp->sd_proto_name;
1057 const char *table = sdp->sd_table_name;
1058 const char *fsname;
1059 char *o, *options;
1060 int ret;
1048 1061
1049 if (sdp->sd_args.ar_spectator) 1062 if (!strcmp("lock_nolock", proto)) {
1050 flags |= LM_MFLAG_SPECTATOR; 1063 lm = &nolock_ops;
1064 sdp->sd_args.ar_localflocks = 1;
1065 sdp->sd_args.ar_localcaching = 1;
1066#ifdef CONFIG_GFS2_FS_LOCKING_DLM
1067 } else if (!strcmp("lock_dlm", proto)) {
1068 lm = &gfs2_dlm_ops;
1069#endif
1070 } else {
1071 printk(KERN_INFO "GFS2: can't find protocol %s\n", proto);
1072 return -ENOENT;
1073 }
1051 1074
1052 fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); 1075 fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
1053 1076
1054 error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata, 1077 ls->ls_ops = lm;
1055 gfs2_glock_cb, sdp, 1078 ls->ls_first = 1;
1056 GFS2_MIN_LVB_SIZE, flags, 1079 ls->ls_id = 0;
1057 &sdp->sd_lockstruct, &sdp->sd_kobj);
1058 if (error) {
1059 fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n",
1060 proto, table, sdp->sd_args.ar_hostdata);
1061 goto out;
1062 }
1063 1080
1064 if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) || 1081 for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
1065 gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >= 1082 substring_t tmp[MAX_OPT_ARGS];
1066 GFS2_MIN_LVB_SIZE)) { 1083 int token, option;
1067 gfs2_unmount_lockproto(&sdp->sd_lockstruct); 1084
1068 goto out; 1085 if (!o || !*o)
1086 continue;
1087
1088 token = match_token(o, *lm->lm_tokens, tmp);
1089 switch (token) {
1090 case Opt_jid:
1091 ret = match_int(&tmp[0], &option);
1092 if (ret || option < 0)
1093 goto hostdata_error;
1094 ls->ls_jid = option;
1095 break;
1096 case Opt_id:
1097 ret = match_int(&tmp[0], &option);
1098 if (ret)
1099 goto hostdata_error;
1100 ls->ls_id = option;
1101 break;
1102 case Opt_first:
1103 ret = match_int(&tmp[0], &option);
1104 if (ret || (option != 0 && option != 1))
1105 goto hostdata_error;
1106 ls->ls_first = option;
1107 break;
1108 case Opt_nodir:
1109 ret = match_int(&tmp[0], &option);
1110 if (ret || (option != 0 && option != 1))
1111 goto hostdata_error;
1112 ls->ls_nodir = option;
1113 break;
1114 case Opt_err:
1115 default:
1116hostdata_error:
1117 fs_info(sdp, "unknown hostdata (%s)\n", o);
1118 return -EINVAL;
1119 }
1069 } 1120 }
1070 1121
1071 if (sdp->sd_args.ar_spectator) 1122 if (sdp->sd_args.ar_spectator)
@@ -1074,22 +1125,25 @@ static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
1074 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table, 1125 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table,
1075 sdp->sd_lockstruct.ls_jid); 1126 sdp->sd_lockstruct.ls_jid);
1076 1127
1077 fs_info(sdp, "Joined cluster. Now mounting FS...\n"); 1128 fsname = strchr(table, ':');
1078 1129 if (fsname)
1079 if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) && 1130 fsname++;
1080 !sdp->sd_args.ar_ignore_local_fs) { 1131 if (lm->lm_mount == NULL) {
1081 sdp->sd_args.ar_localflocks = 1; 1132 fs_info(sdp, "Now mounting FS...\n");
1082 sdp->sd_args.ar_localcaching = 1; 1133 return 0;
1083 } 1134 }
1084 1135 ret = lm->lm_mount(sdp, fsname);
1085out: 1136 if (ret == 0)
1086 return error; 1137 fs_info(sdp, "Joined cluster. Now mounting FS...\n");
1138 return ret;
1087} 1139}
1088 1140
1089void gfs2_lm_unmount(struct gfs2_sbd *sdp) 1141void gfs2_lm_unmount(struct gfs2_sbd *sdp)
1090{ 1142{
1091 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) 1143 const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
1092 gfs2_unmount_lockproto(&sdp->sd_lockstruct); 1144 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) &&
1145 lm->lm_unmount)
1146 lm->lm_unmount(sdp);
1093} 1147}
1094 1148
1095/** 1149/**
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 49877546beb9..abd5429ae285 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -18,7 +18,6 @@
18#include <linux/posix_acl.h> 18#include <linux/posix_acl.h>
19#include <linux/gfs2_ondisk.h> 19#include <linux/gfs2_ondisk.h>
20#include <linux/crc32.h> 20#include <linux/crc32.h>
21#include <linux/lm_interface.h>
22#include <linux/fiemap.h> 21#include <linux/fiemap.h>
23#include <asm/uaccess.h> 22#include <asm/uaccess.h>
24 23
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index f0699ac453f7..4ecdad026eaf 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -19,7 +19,6 @@
19#include <linux/delay.h> 19#include <linux/delay.h>
20#include <linux/gfs2_ondisk.h> 20#include <linux/gfs2_ondisk.h>
21#include <linux/crc32.h> 21#include <linux/crc32.h>
22#include <linux/lm_interface.h>
23#include <linux/time.h> 22#include <linux/time.h>
24 23
25#include "gfs2.h" 24#include "gfs2.h"
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index e8ef0f80fb11..8d53f66b5bcc 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -45,7 +45,6 @@
45#include <linux/fs.h> 45#include <linux/fs.h>
46#include <linux/bio.h> 46#include <linux/bio.h>
47#include <linux/gfs2_ondisk.h> 47#include <linux/gfs2_ondisk.h>
48#include <linux/lm_interface.h>
49#include <linux/kthread.h> 48#include <linux/kthread.h>
50#include <linux/freezer.h> 49#include <linux/freezer.h>
51 50
@@ -108,7 +107,7 @@ int gfs2_shrink_qd_memory(int nr, gfp_t gfp_mask)
108 gfs2_assert_warn(sdp, !qd->qd_slot_count); 107 gfs2_assert_warn(sdp, !qd->qd_slot_count);
109 gfs2_assert_warn(sdp, !qd->qd_bh_count); 108 gfs2_assert_warn(sdp, !qd->qd_bh_count);
110 109
111 gfs2_lvb_unhold(qd->qd_gl); 110 gfs2_glock_put(qd->qd_gl);
112 atomic_dec(&sdp->sd_quota_count); 111 atomic_dec(&sdp->sd_quota_count);
113 112
114 /* Delete it from the common reclaim list */ 113 /* Delete it from the common reclaim list */
@@ -157,11 +156,6 @@ static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id,
157 if (error) 156 if (error)
158 goto fail; 157 goto fail;
159 158
160 error = gfs2_lvb_hold(qd->qd_gl);
161 gfs2_glock_put(qd->qd_gl);
162 if (error)
163 goto fail;
164
165 *qdp = qd; 159 *qdp = qd;
166 160
167 return 0; 161 return 0;
@@ -211,7 +205,7 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
211 205
212 if (qd || !create) { 206 if (qd || !create) {
213 if (new_qd) { 207 if (new_qd) {
214 gfs2_lvb_unhold(new_qd->qd_gl); 208 gfs2_glock_put(new_qd->qd_gl);
215 kmem_cache_free(gfs2_quotad_cachep, new_qd); 209 kmem_cache_free(gfs2_quotad_cachep, new_qd);
216 } 210 }
217 *qdp = qd; 211 *qdp = qd;
@@ -1280,7 +1274,7 @@ void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1280 gfs2_assert_warn(sdp, qd->qd_slot_count == 1); 1274 gfs2_assert_warn(sdp, qd->qd_slot_count == 1);
1281 gfs2_assert_warn(sdp, !qd->qd_bh_count); 1275 gfs2_assert_warn(sdp, !qd->qd_bh_count);
1282 1276
1283 gfs2_lvb_unhold(qd->qd_gl); 1277 gfs2_glock_put(qd->qd_gl);
1284 kmem_cache_free(gfs2_quotad_cachep, qd); 1278 kmem_cache_free(gfs2_quotad_cachep, qd);
1285 1279
1286 spin_lock(&qd_lru_lock); 1280 spin_lock(&qd_lru_lock);
diff --git a/fs/gfs2/recovery.c b/fs/gfs2/recovery.c
index efd09c3d2b26..247e8f7d6b3d 100644
--- a/fs/gfs2/recovery.c
+++ b/fs/gfs2/recovery.c
@@ -13,7 +13,6 @@
13#include <linux/buffer_head.h> 13#include <linux/buffer_head.h>
14#include <linux/gfs2_ondisk.h> 14#include <linux/gfs2_ondisk.h>
15#include <linux/crc32.h> 15#include <linux/crc32.h>
16#include <linux/lm_interface.h>
17#include <linux/kthread.h> 16#include <linux/kthread.h>
18#include <linux/freezer.h> 17#include <linux/freezer.h>
19 18
@@ -427,20 +426,23 @@ static int clean_journal(struct gfs2_jdesc *jd, struct gfs2_log_header_host *hea
427} 426}
428 427
429 428
430static void gfs2_lm_recovery_done(struct gfs2_sbd *sdp, unsigned int jid, 429static void gfs2_recovery_done(struct gfs2_sbd *sdp, unsigned int jid,
431 unsigned int message) 430 unsigned int message)
432{ 431{
433 if (!sdp->sd_lockstruct.ls_ops->lm_recovery_done) 432 char env_jid[20];
434 return; 433 char env_status[20];
435 434 char *envp[] = { env_jid, env_status, NULL };
436 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) 435 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
437 sdp->sd_lockstruct.ls_ops->lm_recovery_done( 436 ls->ls_recover_jid_done = jid;
438 sdp->sd_lockstruct.ls_lockspace, jid, message); 437 ls->ls_recover_jid_status = message;
438 sprintf(env_jid, "JID=%d", jid);
439 sprintf(env_status, "RECOVERY=%s",
440 message == LM_RD_SUCCESS ? "Done" : "Failed");
441 kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
439} 442}
440 443
441
442/** 444/**
443 * gfs2_recover_journal - recovery a given journal 445 * gfs2_recover_journal - recover a given journal
444 * @jd: the struct gfs2_jdesc describing the journal 446 * @jd: the struct gfs2_jdesc describing the journal
445 * 447 *
446 * Acquire the journal's lock, check to see if the journal is clean, and 448 * Acquire the journal's lock, check to see if the journal is clean, and
@@ -561,7 +563,7 @@ int gfs2_recover_journal(struct gfs2_jdesc *jd)
561 if (jd->jd_jid != sdp->sd_lockstruct.ls_jid) 563 if (jd->jd_jid != sdp->sd_lockstruct.ls_jid)
562 gfs2_glock_dq_uninit(&ji_gh); 564 gfs2_glock_dq_uninit(&ji_gh);
563 565
564 gfs2_lm_recovery_done(sdp, jd->jd_jid, LM_RD_SUCCESS); 566 gfs2_recovery_done(sdp, jd->jd_jid, LM_RD_SUCCESS);
565 567
566 if (jd->jd_jid != sdp->sd_lockstruct.ls_jid) 568 if (jd->jd_jid != sdp->sd_lockstruct.ls_jid)
567 gfs2_glock_dq_uninit(&j_gh); 569 gfs2_glock_dq_uninit(&j_gh);
@@ -581,7 +583,7 @@ fail_gunlock_j:
581 fs_info(sdp, "jid=%u: %s\n", jd->jd_jid, (error) ? "Failed" : "Done"); 583 fs_info(sdp, "jid=%u: %s\n", jd->jd_jid, (error) ? "Failed" : "Done");
582 584
583fail: 585fail:
584 gfs2_lm_recovery_done(sdp, jd->jd_jid, LM_RD_GAVEUP); 586 gfs2_recovery_done(sdp, jd->jd_jid, LM_RD_GAVEUP);
585 return error; 587 return error;
586} 588}
587 589
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 8b01c635d925..ba5a021b1c57 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -13,7 +13,6 @@
13#include <linux/buffer_head.h> 13#include <linux/buffer_head.h>
14#include <linux/fs.h> 14#include <linux/fs.h>
15#include <linux/gfs2_ondisk.h> 15#include <linux/gfs2_ondisk.h>
16#include <linux/lm_interface.h>
17#include <linux/prefetch.h> 16#include <linux/prefetch.h>
18 17
19#include "gfs2.h" 18#include "gfs2.h"
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 141b781f2fcc..7cf302b135ce 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -15,7 +15,6 @@
15#include <linux/crc32.h> 15#include <linux/crc32.h>
16#include <linux/gfs2_ondisk.h> 16#include <linux/gfs2_ondisk.h>
17#include <linux/bio.h> 17#include <linux/bio.h>
18#include <linux/lm_interface.h>
19 18
20#include "gfs2.h" 19#include "gfs2.h"
21#include "incore.h" 20#include "incore.h"
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index a58a120dac92..a78997ea5037 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -14,9 +14,8 @@
14#include <linux/buffer_head.h> 14#include <linux/buffer_head.h>
15#include <linux/module.h> 15#include <linux/module.h>
16#include <linux/kobject.h> 16#include <linux/kobject.h>
17#include <linux/gfs2_ondisk.h>
18#include <linux/lm_interface.h>
19#include <asm/uaccess.h> 17#include <asm/uaccess.h>
18#include <linux/gfs2_ondisk.h>
20 19
21#include "gfs2.h" 20#include "gfs2.h"
22#include "incore.h" 21#include "incore.h"
@@ -224,14 +223,145 @@ static struct lockstruct_attr lockstruct_attr_##name = __ATTR_RO(name)
224 223
225LOCKSTRUCT_ATTR(jid, "%u\n"); 224LOCKSTRUCT_ATTR(jid, "%u\n");
226LOCKSTRUCT_ATTR(first, "%u\n"); 225LOCKSTRUCT_ATTR(first, "%u\n");
227LOCKSTRUCT_ATTR(lvb_size, "%u\n");
228LOCKSTRUCT_ATTR(flags, "%d\n");
229 226
230static struct attribute *lockstruct_attrs[] = { 227static struct attribute *lockstruct_attrs[] = {
231 &lockstruct_attr_jid.attr, 228 &lockstruct_attr_jid.attr,
232 &lockstruct_attr_first.attr, 229 &lockstruct_attr_first.attr,
233 &lockstruct_attr_lvb_size.attr, 230 NULL,
234 &lockstruct_attr_flags.attr, 231};
232
233/*
234 * lock_module. Originally from lock_dlm
235 */
236
237static ssize_t proto_name_show(struct gfs2_sbd *sdp, char *buf)
238{
239 const struct lm_lockops *ops = sdp->sd_lockstruct.ls_ops;
240 return sprintf(buf, "%s\n", ops->lm_proto_name);
241}
242
243static ssize_t block_show(struct gfs2_sbd *sdp, char *buf)
244{
245 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
246 ssize_t ret;
247 int val = 0;
248
249 if (test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))
250 val = 1;
251 ret = sprintf(buf, "%d\n", val);
252 return ret;
253}
254
255static ssize_t block_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
256{
257 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
258 ssize_t ret = len;
259 int val;
260
261 val = simple_strtol(buf, NULL, 0);
262
263 if (val == 1)
264 set_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
265 else if (val == 0) {
266 clear_bit(DFL_BLOCK_LOCKS, &ls->ls_flags);
267 smp_mb__after_clear_bit();
268 gfs2_glock_thaw(sdp);
269 } else {
270 ret = -EINVAL;
271 }
272 return ret;
273}
274
275static ssize_t lkid_show(struct gfs2_sbd *sdp, char *buf)
276{
277 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
278 return sprintf(buf, "%u\n", ls->ls_id);
279}
280
281static ssize_t lkfirst_show(struct gfs2_sbd *sdp, char *buf)
282{
283 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
284 return sprintf(buf, "%d\n", ls->ls_first);
285}
286
287static ssize_t first_done_show(struct gfs2_sbd *sdp, char *buf)
288{
289 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
290 return sprintf(buf, "%d\n", ls->ls_first_done);
291}
292
293static ssize_t recover_show(struct gfs2_sbd *sdp, char *buf)
294{
295 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
296 return sprintf(buf, "%d\n", ls->ls_recover_jid);
297}
298
299static void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid)
300{
301 struct gfs2_jdesc *jd;
302
303 spin_lock(&sdp->sd_jindex_spin);
304 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
305 if (jd->jd_jid != jid)
306 continue;
307 jd->jd_dirty = 1;
308 break;
309 }
310 spin_unlock(&sdp->sd_jindex_spin);
311}
312
313static ssize_t recover_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
314{
315 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
316 ls->ls_recover_jid = simple_strtol(buf, NULL, 0);
317 gfs2_jdesc_make_dirty(sdp, ls->ls_recover_jid);
318 if (sdp->sd_recoverd_process)
319 wake_up_process(sdp->sd_recoverd_process);
320 return len;
321}
322
323static ssize_t recover_done_show(struct gfs2_sbd *sdp, char *buf)
324{
325 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
326 return sprintf(buf, "%d\n", ls->ls_recover_jid_done);
327}
328
329static ssize_t recover_status_show(struct gfs2_sbd *sdp, char *buf)
330{
331 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
332 return sprintf(buf, "%d\n", ls->ls_recover_jid_status);
333}
334
335struct gdlm_attr {
336 struct attribute attr;
337 ssize_t (*show)(struct gfs2_sbd *sdp, char *);
338 ssize_t (*store)(struct gfs2_sbd *sdp, const char *, size_t);
339};
340
341#define GDLM_ATTR(_name,_mode,_show,_store) \
342static struct gdlm_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
343
344GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
345GDLM_ATTR(block, 0644, block_show, block_store);
346GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
347GDLM_ATTR(id, 0444, lkid_show, NULL);
348GDLM_ATTR(first, 0444, lkfirst_show, NULL);
349GDLM_ATTR(first_done, 0444, first_done_show, NULL);
350GDLM_ATTR(recover, 0644, recover_show, recover_store);
351GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
352GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
353
354static struct attribute *lock_module_attrs[] = {
355 &gdlm_attr_proto_name.attr,
356 &gdlm_attr_block.attr,
357 &gdlm_attr_withdraw.attr,
358 &gdlm_attr_id.attr,
359 &lockstruct_attr_jid.attr,
360 &gdlm_attr_first.attr,
361 &gdlm_attr_first_done.attr,
362 &gdlm_attr_recover.attr,
363 &gdlm_attr_recover_done.attr,
364 &gdlm_attr_recover_status.attr,
235 NULL, 365 NULL,
236}; 366};
237 367
@@ -412,6 +542,11 @@ static struct attribute_group tune_group = {
412 .attrs = tune_attrs, 542 .attrs = tune_attrs,
413}; 543};
414 544
545static struct attribute_group lock_module_group = {
546 .name = "lock_module",
547 .attrs = lock_module_attrs,
548};
549
415int gfs2_sys_fs_add(struct gfs2_sbd *sdp) 550int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
416{ 551{
417 int error; 552 int error;
@@ -434,9 +569,15 @@ int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
434 if (error) 569 if (error)
435 goto fail_args; 570 goto fail_args;
436 571
572 error = sysfs_create_group(&sdp->sd_kobj, &lock_module_group);
573 if (error)
574 goto fail_tune;
575
437 kobject_uevent(&sdp->sd_kobj, KOBJ_ADD); 576 kobject_uevent(&sdp->sd_kobj, KOBJ_ADD);
438 return 0; 577 return 0;
439 578
579fail_tune:
580 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
440fail_args: 581fail_args:
441 sysfs_remove_group(&sdp->sd_kobj, &args_group); 582 sysfs_remove_group(&sdp->sd_kobj, &args_group);
442fail_lockstruct: 583fail_lockstruct:
@@ -453,6 +594,7 @@ void gfs2_sys_fs_del(struct gfs2_sbd *sdp)
453 sysfs_remove_group(&sdp->sd_kobj, &tune_group); 594 sysfs_remove_group(&sdp->sd_kobj, &tune_group);
454 sysfs_remove_group(&sdp->sd_kobj, &args_group); 595 sysfs_remove_group(&sdp->sd_kobj, &args_group);
455 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group); 596 sysfs_remove_group(&sdp->sd_kobj, &lockstruct_group);
597 sysfs_remove_group(&sdp->sd_kobj, &lock_module_group);
456 kobject_put(&sdp->sd_kobj); 598 kobject_put(&sdp->sd_kobj);
457} 599}
458 600
diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index f677b8a83f0c..33cd523ec97e 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -12,9 +12,8 @@
12#include <linux/spinlock.h> 12#include <linux/spinlock.h>
13#include <linux/completion.h> 13#include <linux/completion.h>
14#include <linux/buffer_head.h> 14#include <linux/buffer_head.h>
15#include <linux/gfs2_ondisk.h>
16#include <linux/kallsyms.h> 15#include <linux/kallsyms.h>
17#include <linux/lm_interface.h> 16#include <linux/gfs2_ondisk.h>
18 17
19#include "gfs2.h" 18#include "gfs2.h"
20#include "incore.h" 19#include "incore.h"
diff --git a/fs/gfs2/util.c b/fs/gfs2/util.c
index 374f50e95496..9d12b1118ba0 100644
--- a/fs/gfs2/util.c
+++ b/fs/gfs2/util.c
@@ -13,7 +13,6 @@
13#include <linux/buffer_head.h> 13#include <linux/buffer_head.h>
14#include <linux/crc32.h> 14#include <linux/crc32.h>
15#include <linux/gfs2_ondisk.h> 15#include <linux/gfs2_ondisk.h>
16#include <linux/lm_interface.h>
17#include <asm/uaccess.h> 16#include <asm/uaccess.h>
18 17
19#include "gfs2.h" 18#include "gfs2.h"
@@ -35,6 +34,8 @@ void gfs2_assert_i(struct gfs2_sbd *sdp)
35 34
36int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...) 35int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
37{ 36{
37 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
38 const struct lm_lockops *lm = ls->ls_ops;
38 va_list args; 39 va_list args;
39 40
40 if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 41 if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
@@ -47,8 +48,12 @@ int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
47 fs_err(sdp, "about to withdraw this file system\n"); 48 fs_err(sdp, "about to withdraw this file system\n");
48 BUG_ON(sdp->sd_args.ar_debug); 49 BUG_ON(sdp->sd_args.ar_debug);
49 50
50 fs_err(sdp, "telling LM to withdraw\n"); 51 kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
51 gfs2_withdraw_lockproto(&sdp->sd_lockstruct); 52
53 if (lm->lm_unmount) {
54 fs_err(sdp, "telling LM to unmount\n");
55 lm->lm_unmount(sdp);
56 }
52 fs_err(sdp, "withdrawn\n"); 57 fs_err(sdp, "withdrawn\n");
53 dump_stack(); 58 dump_stack();
54 59
diff --git a/include/linux/lm_interface.h b/include/linux/lm_interface.h
deleted file mode 100644
index 2ed8fa1b762b..000000000000
--- a/include/linux/lm_interface.h
+++ /dev/null
@@ -1,277 +0,0 @@
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#ifndef __LM_INTERFACE_DOT_H__
11#define __LM_INTERFACE_DOT_H__
12
13
14typedef void (*lm_callback_t) (void *ptr, unsigned int type, void *data);
15
16/*
17 * lm_mount() flags
18 *
19 * LM_MFLAG_SPECTATOR
20 * GFS is asking to join the filesystem's lockspace, but it doesn't want to
21 * modify the filesystem. The lock module shouldn't assign a journal to the FS
22 * mount. It shouldn't send recovery callbacks to the FS mount. If the node
23 * dies or withdraws, all locks can be wiped immediately.
24 *
25 * LM_MFLAG_CONV_NODROP
26 * Do not allow the dlm to internally resolve conversion deadlocks by demoting
27 * the lock to unlocked and then reacquiring it in the requested mode. Instead,
28 * it should cancel the request and return LM_OUT_CONV_DEADLK.
29 */
30
31#define LM_MFLAG_SPECTATOR 0x00000001
32#define LM_MFLAG_CONV_NODROP 0x00000002
33
34/*
35 * lm_lockstruct flags
36 *
37 * LM_LSFLAG_LOCAL
38 * The lock_nolock module returns LM_LSFLAG_LOCAL to GFS, indicating that GFS
39 * can make single-node optimizations.
40 */
41
42#define LM_LSFLAG_LOCAL 0x00000001
43
44/*
45 * lm_lockname types
46 */
47
48#define LM_TYPE_RESERVED 0x00
49#define LM_TYPE_NONDISK 0x01
50#define LM_TYPE_INODE 0x02
51#define LM_TYPE_RGRP 0x03
52#define LM_TYPE_META 0x04
53#define LM_TYPE_IOPEN 0x05
54#define LM_TYPE_FLOCK 0x06
55#define LM_TYPE_PLOCK 0x07
56#define LM_TYPE_QUOTA 0x08
57#define LM_TYPE_JOURNAL 0x09
58
59/*
60 * lm_lock() states
61 *
62 * SHARED is compatible with SHARED, not with DEFERRED or EX.
63 * DEFERRED is compatible with DEFERRED, not with SHARED or EX.
64 */
65
66#define LM_ST_UNLOCKED 0
67#define LM_ST_EXCLUSIVE 1
68#define LM_ST_DEFERRED 2
69#define LM_ST_SHARED 3
70
71/*
72 * lm_lock() flags
73 *
74 * LM_FLAG_TRY
75 * Don't wait to acquire the lock if it can't be granted immediately.
76 *
77 * LM_FLAG_TRY_1CB
78 * Send one blocking callback if TRY is set and the lock is not granted.
79 *
80 * LM_FLAG_NOEXP
81 * GFS sets this flag on lock requests it makes while doing journal recovery.
82 * These special requests should not be blocked due to the recovery like
83 * ordinary locks would be.
84 *
85 * LM_FLAG_ANY
86 * A SHARED request may also be granted in DEFERRED, or a DEFERRED request may
87 * also be granted in SHARED. The preferred state is whichever is compatible
88 * with other granted locks, or the specified state if no other locks exist.
89 *
90 * LM_FLAG_PRIORITY
91 * Override fairness considerations. Suppose a lock is held in a shared state
92 * and there is a pending request for the deferred state. A shared lock
93 * request with the priority flag would be allowed to bypass the deferred
94 * request and directly join the other shared lock. A shared lock request
95 * without the priority flag might be forced to wait until the deferred
96 * requested had acquired and released the lock.
97 */
98
99#define LM_FLAG_TRY 0x00000001
100#define LM_FLAG_TRY_1CB 0x00000002
101#define LM_FLAG_NOEXP 0x00000004
102#define LM_FLAG_ANY 0x00000008
103#define LM_FLAG_PRIORITY 0x00000010
104
105/*
106 * lm_lock() and lm_async_cb return flags
107 *
108 * LM_OUT_ST_MASK
109 * Masks the lower two bits of lock state in the returned value.
110 *
111 * LM_OUT_CACHEABLE
112 * The lock hasn't been released so GFS can continue to cache data for it.
113 *
114 * LM_OUT_CANCELED
115 * The lock request was canceled.
116 *
117 * LM_OUT_ASYNC
118 * The result of the request will be returned in an LM_CB_ASYNC callback.
119 *
120 * LM_OUT_CONV_DEADLK
121 * The lock request was canceled do to a conversion deadlock.
122 */
123
124#define LM_OUT_ST_MASK 0x00000003
125#define LM_OUT_CANCELED 0x00000008
126#define LM_OUT_ASYNC 0x00000080
127#define LM_OUT_ERROR 0x00000100
128
129/*
130 * lm_callback_t types
131 *
132 * LM_CB_NEED_E LM_CB_NEED_D LM_CB_NEED_S
133 * Blocking callback, a remote node is requesting the given lock in
134 * EXCLUSIVE, DEFERRED, or SHARED.
135 *
136 * LM_CB_NEED_RECOVERY
137 * The given journal needs to be recovered.
138 *
139 * LM_CB_ASYNC
140 * The given lock has been granted.
141 */
142
143#define LM_CB_NEED_E 257
144#define LM_CB_NEED_D 258
145#define LM_CB_NEED_S 259
146#define LM_CB_NEED_RECOVERY 260
147#define LM_CB_ASYNC 262
148
149/*
150 * lm_recovery_done() messages
151 */
152
153#define LM_RD_GAVEUP 308
154#define LM_RD_SUCCESS 309
155
156
157struct lm_lockname {
158 u64 ln_number;
159 unsigned int ln_type;
160};
161
162#define lm_name_equal(name1, name2) \
163 (((name1)->ln_number == (name2)->ln_number) && \
164 ((name1)->ln_type == (name2)->ln_type)) \
165
166struct lm_async_cb {
167 struct lm_lockname lc_name;
168 int lc_ret;
169};
170
171struct lm_lockstruct;
172
173struct lm_lockops {
174 const char *lm_proto_name;
175
176 /*
177 * Mount/Unmount
178 */
179
180 int (*lm_mount) (char *table_name, char *host_data,
181 lm_callback_t cb, void *cb_data,
182 unsigned int min_lvb_size, int flags,
183 struct lm_lockstruct *lockstruct,
184 struct kobject *fskobj);
185
186 void (*lm_others_may_mount) (void *lockspace);
187
188 void (*lm_unmount) (void *lockspace);
189
190 void (*lm_withdraw) (void *lockspace);
191
192 /*
193 * Lock oriented operations
194 */
195
196 int (*lm_get_lock) (void *lockspace, struct lm_lockname *name, void **lockp);
197
198 void (*lm_put_lock) (void *lock);
199
200 unsigned int (*lm_lock) (void *lock, unsigned int cur_state,
201 unsigned int req_state, unsigned int flags);
202
203 unsigned int (*lm_unlock) (void *lock, unsigned int cur_state);
204
205 void (*lm_cancel) (void *lock);
206
207 int (*lm_hold_lvb) (void *lock, char **lvbp);
208 void (*lm_unhold_lvb) (void *lock, char *lvb);
209
210 /*
211 * Posix Lock oriented operations
212 */
213
214 int (*lm_plock_get) (void *lockspace, struct lm_lockname *name,
215 struct file *file, struct file_lock *fl);
216
217 int (*lm_plock) (void *lockspace, struct lm_lockname *name,
218 struct file *file, int cmd, struct file_lock *fl);
219
220 int (*lm_punlock) (void *lockspace, struct lm_lockname *name,
221 struct file *file, struct file_lock *fl);
222
223 /*
224 * Client oriented operations
225 */
226
227 void (*lm_recovery_done) (void *lockspace, unsigned int jid,
228 unsigned int message);
229
230 struct module *lm_owner;
231};
232
233/*
234 * lm_mount() return values
235 *
236 * ls_jid - the journal ID this node should use
237 * ls_first - this node is the first to mount the file system
238 * ls_lvb_size - size in bytes of lock value blocks
239 * ls_lockspace - lock module's context for this file system
240 * ls_ops - lock module's functions
241 * ls_flags - lock module features
242 */
243
244struct lm_lockstruct {
245 unsigned int ls_jid;
246 unsigned int ls_first;
247 unsigned int ls_lvb_size;
248 void *ls_lockspace;
249 const struct lm_lockops *ls_ops;
250 int ls_flags;
251};
252
253/*
254 * Lock module bottom interface. A lock module makes itself available to GFS
255 * with these functions.
256 */
257
258int gfs2_register_lockproto(const struct lm_lockops *proto);
259void gfs2_unregister_lockproto(const struct lm_lockops *proto);
260
261/*
262 * Lock module top interface. GFS calls these functions when mounting or
263 * unmounting a file system.
264 */
265
266int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
267 lm_callback_t cb, void *cb_data,
268 unsigned int min_lvb_size, int flags,
269 struct lm_lockstruct *lockstruct,
270 struct kobject *fskobj);
271
272void gfs2_unmount_lockproto(struct lm_lockstruct *lockstruct);
273
274void gfs2_withdraw_lockproto(struct lm_lockstruct *lockstruct);
275
276#endif /* __LM_INTERFACE_DOT_H__ */
277
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 20:36:03 -0500