diff options
author | Steven Whitehouse <swhiteho@redhat.com> | 2009-01-12 10:43:39 +0000 |
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committer | Steven Whitehouse <steve@dolmen.chygwyn.com> | 2009-03-24 11:21:14 +0000 |
commit | f057f6cdf64175db1151b1f5d110e29904f119a1 (patch) | |
tree | 582dbf358e351f64977620c29ebf772d693b1948 /fs/gfs2/ops_fstype.c | |
parent | 22077f57dec8fcbeb1112b35313961c0902ff038 (diff) | |
download | op-kernel-dev-f057f6cdf64175db1151b1f5d110e29904f119a1.zip op-kernel-dev-f057f6cdf64175db1151b1f5d110e29904f119a1.tar.gz |
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 (limited to 'fs/gfs2/ops_fstype.c')
-rw-r--r-- | fs/gfs2/ops_fstype.c | 134 |
1 files changed, 94 insertions, 40 deletions
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index 402b6a2..95bb33e 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -17,7 +17,6 @@ #include <linux/namei.h> #include <linux/mount.h> #include <linux/gfs2_ondisk.h> -#include <linux/lm_interface.h> #include "gfs2.h" #include "incore.h" @@ -627,13 +626,13 @@ static int map_journal_extents(struct gfs2_sbd *sdp) return rc; } -static void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp) +static void gfs2_others_may_mount(struct gfs2_sbd *sdp) { - if (!sdp->sd_lockstruct.ls_ops->lm_others_may_mount) - return; - if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) - sdp->sd_lockstruct.ls_ops->lm_others_may_mount( - sdp->sd_lockstruct.ls_lockspace); + char *message = "FIRSTMOUNT=Done"; + char *envp[] = { message, NULL }; + struct lm_lockstruct *ls = &sdp->sd_lockstruct; + ls->ls_first_done = 1; + kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp); } /** @@ -793,7 +792,7 @@ static int init_journal(struct gfs2_sbd *sdp, int undo) } } - gfs2_lm_others_may_mount(sdp); + gfs2_others_may_mount(sdp); } else if (!sdp->sd_args.ar_spectator) { error = gfs2_recover_journal(sdp->sd_jdesc); if (error) { @@ -1002,7 +1001,6 @@ static int init_threads(struct gfs2_sbd *sdp, int undo) goto fail_quotad; sdp->sd_log_flush_time = jiffies; - sdp->sd_jindex_refresh_time = jiffies; p = kthread_run(gfs2_logd, sdp, "gfs2_logd"); error = IS_ERR(p); @@ -1030,6 +1028,17 @@ fail: return error; } +static const match_table_t nolock_tokens = { + { Opt_jid, "jid=%d\n", }, + { Opt_err, NULL }, +}; + +static const struct lm_lockops nolock_ops = { + .lm_proto_name = "lock_nolock", + .lm_put_lock = kmem_cache_free, + .lm_tokens = &nolock_tokens, +}; + /** * gfs2_lm_mount - mount a locking protocol * @sdp: the filesystem @@ -1041,31 +1050,73 @@ fail: static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) { - char *proto = sdp->sd_proto_name; - char *table = sdp->sd_table_name; - int flags = LM_MFLAG_CONV_NODROP; - int error; + const struct lm_lockops *lm; + struct lm_lockstruct *ls = &sdp->sd_lockstruct; + struct gfs2_args *args = &sdp->sd_args; + const char *proto = sdp->sd_proto_name; + const char *table = sdp->sd_table_name; + const char *fsname; + char *o, *options; + int ret; - if (sdp->sd_args.ar_spectator) - flags |= LM_MFLAG_SPECTATOR; + if (!strcmp("lock_nolock", proto)) { + lm = &nolock_ops; + sdp->sd_args.ar_localflocks = 1; + sdp->sd_args.ar_localcaching = 1; +#ifdef CONFIG_GFS2_FS_LOCKING_DLM + } else if (!strcmp("lock_dlm", proto)) { + lm = &gfs2_dlm_ops; +#endif + } else { + printk(KERN_INFO "GFS2: can't find protocol %s\n", proto); + return -ENOENT; + } fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); - error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata, - gfs2_glock_cb, sdp, - GFS2_MIN_LVB_SIZE, flags, - &sdp->sd_lockstruct, &sdp->sd_kobj); - if (error) { - fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n", - proto, table, sdp->sd_args.ar_hostdata); - goto out; - } + ls->ls_ops = lm; + ls->ls_first = 1; + ls->ls_id = 0; - if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) || - gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >= - GFS2_MIN_LVB_SIZE)) { - gfs2_unmount_lockproto(&sdp->sd_lockstruct); - goto out; + for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) { + substring_t tmp[MAX_OPT_ARGS]; + int token, option; + + if (!o || !*o) + continue; + + token = match_token(o, *lm->lm_tokens, tmp); + switch (token) { + case Opt_jid: + ret = match_int(&tmp[0], &option); + if (ret || option < 0) + goto hostdata_error; + ls->ls_jid = option; + break; + case Opt_id: + ret = match_int(&tmp[0], &option); + if (ret) + goto hostdata_error; + ls->ls_id = option; + break; + case Opt_first: + ret = match_int(&tmp[0], &option); + if (ret || (option != 0 && option != 1)) + goto hostdata_error; + ls->ls_first = option; + break; + case Opt_nodir: + ret = match_int(&tmp[0], &option); + if (ret || (option != 0 && option != 1)) + goto hostdata_error; + ls->ls_nodir = option; + break; + case Opt_err: + default: +hostdata_error: + fs_info(sdp, "unknown hostdata (%s)\n", o); + return -EINVAL; + } } if (sdp->sd_args.ar_spectator) @@ -1074,22 +1125,25 @@ static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table, sdp->sd_lockstruct.ls_jid); - fs_info(sdp, "Joined cluster. Now mounting FS...\n"); - - if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) && - !sdp->sd_args.ar_ignore_local_fs) { - sdp->sd_args.ar_localflocks = 1; - sdp->sd_args.ar_localcaching = 1; + fsname = strchr(table, ':'); + if (fsname) + fsname++; + if (lm->lm_mount == NULL) { + fs_info(sdp, "Now mounting FS...\n"); + return 0; } - -out: - return error; + ret = lm->lm_mount(sdp, fsname); + if (ret == 0) + fs_info(sdp, "Joined cluster. Now mounting FS...\n"); + return ret; } void gfs2_lm_unmount(struct gfs2_sbd *sdp) { - if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) - gfs2_unmount_lockproto(&sdp->sd_lockstruct); + const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops; + if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) && + lm->lm_unmount) + lm->lm_unmount(sdp); } /** |