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-rw-r--r--fs/gfs2/glock.c23
-rw-r--r--fs/gfs2/glops.c77
-rw-r--r--fs/gfs2/incore.h9
-rw-r--r--fs/gfs2/lock_dlm.c34
-rw-r--r--fs/gfs2/meta_io.c3
-rw-r--r--fs/gfs2/ops_fstype.c11
-rw-r--r--fs/gfs2/quota.c3
-rw-r--r--fs/gfs2/super.c75
-rw-r--r--fs/gfs2/super.h1
-rw-r--r--fs/gfs2/sys.c2
-rw-r--r--fs/gfs2/util.c183
11 files changed, 390 insertions, 31 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 454d94dd8933..7602d0e2492c 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -271,7 +271,7 @@ static void __gfs2_glock_put(struct gfs2_glock *gl)
gfs2_glock_remove_from_lru(gl);
spin_unlock(&gl->gl_lockref.lock);
GLOCK_BUG_ON(gl, !list_empty(&gl->gl_holders));
- GLOCK_BUG_ON(gl, mapping && mapping->nrpages);
+ GLOCK_BUG_ON(gl, mapping && mapping->nrpages && !gfs2_withdrawn(sdp));
trace_gfs2_glock_put(gl);
sdp->sd_lockstruct.ls_ops->lm_put_lock(gl);
}
@@ -576,7 +576,8 @@ __acquires(&gl->gl_lockref.lock)
unsigned int lck_flags = (unsigned int)(gh ? gh->gh_flags : 0);
int ret;
- if (target != LM_ST_UNLOCKED && glock_blocked_by_withdraw(gl))
+ if (target != LM_ST_UNLOCKED && glock_blocked_by_withdraw(gl) &&
+ gh && !(gh->gh_flags & LM_FLAG_NOEXP))
return;
lck_flags &= (LM_FLAG_TRY | LM_FLAG_TRY_1CB | LM_FLAG_NOEXP |
LM_FLAG_PRIORITY);
@@ -1222,7 +1223,7 @@ int gfs2_glock_nq(struct gfs2_holder *gh)
struct gfs2_glock *gl = gh->gh_gl;
int error = 0;
- if (glock_blocked_by_withdraw(gl))
+ if (glock_blocked_by_withdraw(gl) && !(gh->gh_flags & LM_FLAG_NOEXP))
return -EIO;
if (test_bit(GLF_LRU, &gl->gl_flags))
@@ -1266,10 +1267,26 @@ int gfs2_glock_poll(struct gfs2_holder *gh)
void gfs2_glock_dq(struct gfs2_holder *gh)
{
struct gfs2_glock *gl = gh->gh_gl;
+ struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
unsigned delay = 0;
int fast_path = 0;
spin_lock(&gl->gl_lockref.lock);
+ /*
+ * If we're in the process of file system withdraw, we cannot just
+ * dequeue any glocks until our journal is recovered, lest we
+ * introduce file system corruption. We need two exceptions to this
+ * rule: We need to allow unlocking of nondisk glocks and the glock
+ * for our own journal that needs recovery.
+ */
+ if (test_bit(SDF_WITHDRAW_RECOVERY, &sdp->sd_flags) &&
+ glock_blocked_by_withdraw(gl) &&
+ gh->gh_gl != sdp->sd_jinode_gl) {
+ sdp->sd_glock_dqs_held++;
+ might_sleep();
+ wait_on_bit(&sdp->sd_flags, SDF_WITHDRAW_RECOVERY,
+ TASK_UNINTERRUPTIBLE);
+ }
if (gh->gh_flags & GL_NOCACHE)
handle_callback(gl, LM_ST_UNLOCKED, 0, false);
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 3553ca939337..7cfacbe35e59 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -29,6 +29,8 @@
struct workqueue_struct *gfs2_freeze_wq;
+extern struct workqueue_struct *gfs2_control_wq;
+
static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
{
fs_err(gl->gl_name.ln_sbd,
@@ -496,13 +498,17 @@ static void freeze_go_sync(struct gfs2_glock *gl)
int error = 0;
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
- if (gl->gl_state == LM_ST_SHARED &&
+ if (gl->gl_state == LM_ST_SHARED && !gfs2_withdrawn(sdp) &&
test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
error = freeze_super(sdp->sd_vfs);
if (error) {
fs_info(sdp, "GFS2: couldn't freeze filesystem: %d\n",
error);
+ if (gfs2_withdrawn(sdp)) {
+ atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
+ return;
+ }
gfs2_assert_withdraw(sdp, 0);
}
queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work);
@@ -577,6 +583,73 @@ static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
}
}
+/**
+ * inode_go_free - wake up anyone waiting for dlm's unlock ast to free it
+ * @gl: glock being freed
+ *
+ * For now, this is only used for the journal inode glock. In withdraw
+ * situations, we need to wait for the glock to be freed so that we know
+ * other nodes may proceed with recovery / journal replay.
+ */
+static void inode_go_free(struct gfs2_glock *gl)
+{
+ /* Note that we cannot reference gl_object because it's already set
+ * to NULL by this point in its lifecycle. */
+ if (!test_bit(GLF_FREEING, &gl->gl_flags))
+ return;
+ clear_bit_unlock(GLF_FREEING, &gl->gl_flags);
+ wake_up_bit(&gl->gl_flags, GLF_FREEING);
+}
+
+/**
+ * nondisk_go_callback - used to signal when a node did a withdraw
+ * @gl: the nondisk glock
+ * @remote: true if this came from a different cluster node
+ *
+ */
+static void nondisk_go_callback(struct gfs2_glock *gl, bool remote)
+{
+ struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
+
+ /* Ignore the callback unless it's from another node, and it's the
+ live lock. */
+ if (!remote || gl->gl_name.ln_number != GFS2_LIVE_LOCK)
+ return;
+
+ /* First order of business is to cancel the demote request. We don't
+ * really want to demote a nondisk glock. At best it's just to inform
+ * us of another node's withdraw. We'll keep it in SH mode. */
+ clear_bit(GLF_DEMOTE, &gl->gl_flags);
+ clear_bit(GLF_PENDING_DEMOTE, &gl->gl_flags);
+
+ /* Ignore the unlock if we're withdrawn, unmounting, or in recovery. */
+ if (test_bit(SDF_NORECOVERY, &sdp->sd_flags) ||
+ test_bit(SDF_WITHDRAWN, &sdp->sd_flags) ||
+ test_bit(SDF_REMOTE_WITHDRAW, &sdp->sd_flags))
+ return;
+
+ /* We only care when a node wants us to unlock, because that means
+ * they want a journal recovered. */
+ if (gl->gl_demote_state != LM_ST_UNLOCKED)
+ return;
+
+ if (sdp->sd_args.ar_spectator) {
+ fs_warn(sdp, "Spectator node cannot recover journals.\n");
+ return;
+ }
+
+ fs_warn(sdp, "Some node has withdrawn; checking for recovery.\n");
+ set_bit(SDF_REMOTE_WITHDRAW, &sdp->sd_flags);
+ /*
+ * We can't call remote_withdraw directly here or gfs2_recover_journal
+ * because this is called from the glock unlock function and the
+ * remote_withdraw needs to enqueue and dequeue the same "live" glock
+ * we were called from. So we queue it to the control work queue in
+ * lock_dlm.
+ */
+ queue_delayed_work(gfs2_control_wq, &sdp->sd_control_work, 0);
+}
+
const struct gfs2_glock_operations gfs2_meta_glops = {
.go_type = LM_TYPE_META,
.go_flags = GLOF_NONDISK,
@@ -590,6 +663,7 @@ const struct gfs2_glock_operations gfs2_inode_glops = {
.go_dump = inode_go_dump,
.go_type = LM_TYPE_INODE,
.go_flags = GLOF_ASPACE | GLOF_LRU,
+ .go_free = inode_go_free,
};
const struct gfs2_glock_operations gfs2_rgrp_glops = {
@@ -623,6 +697,7 @@ const struct gfs2_glock_operations gfs2_flock_glops = {
const struct gfs2_glock_operations gfs2_nondisk_glops = {
.go_type = LM_TYPE_NONDISK,
.go_flags = GLOF_NONDISK,
+ .go_callback = nondisk_go_callback,
};
const struct gfs2_glock_operations gfs2_quota_glops = {
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 3072707aff7a..8cd564bcf5e6 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -242,6 +242,7 @@ struct gfs2_glock_operations {
void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl,
const char *fs_id_buf);
void (*go_callback)(struct gfs2_glock *gl, bool remote);
+ void (*go_free)(struct gfs2_glock *gl);
const int go_type;
const unsigned long go_flags;
#define GLOF_ASPACE 1 /* address space attached */
@@ -343,6 +344,7 @@ enum {
GLF_OBJECT = 14, /* Used only for tracing */
GLF_BLOCKING = 15,
GLF_INODE_CREATING = 16, /* Inode creation occurring */
+ GLF_FREEING = 18, /* Wait for glock to be freed */
};
struct gfs2_glock {
@@ -619,6 +621,10 @@ enum {
SDF_FORCE_AIL_FLUSH = 9,
SDF_FS_FROZEN = 10,
SDF_WITHDRAWING = 11, /* Will withdraw eventually */
+ SDF_WITHDRAW_IN_PROG = 12, /* Withdraw is in progress */
+ SDF_REMOTE_WITHDRAW = 13, /* Performing remote recovery */
+ SDF_WITHDRAW_RECOVERY = 14, /* Wait for journal recovery when we are
+ withdrawing */
};
enum gfs2_freeze_state {
@@ -769,6 +775,7 @@ struct gfs2_sbd {
struct gfs2_jdesc *sd_jdesc;
struct gfs2_holder sd_journal_gh;
struct gfs2_holder sd_jinode_gh;
+ struct gfs2_glock *sd_jinode_gl;
struct gfs2_holder sd_sc_gh;
struct gfs2_holder sd_qc_gh;
@@ -830,6 +837,7 @@ struct gfs2_sbd {
struct bio *sd_log_bio;
wait_queue_head_t sd_log_flush_wait;
int sd_log_error; /* First log error */
+ wait_queue_head_t sd_withdraw_wait;
atomic_t sd_reserving_log;
wait_queue_head_t sd_reserving_log_wait;
@@ -853,6 +861,7 @@ struct gfs2_sbd {
unsigned long sd_last_warning;
struct dentry *debugfs_dir; /* debugfs directory */
+ unsigned long sd_glock_dqs_held;
};
static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c
index 57fdf53d2246..9f2b5609f225 100644
--- a/fs/gfs2/lock_dlm.c
+++ b/fs/gfs2/lock_dlm.c
@@ -16,6 +16,8 @@
#include "incore.h"
#include "glock.h"
+#include "glops.h"
+#include "recovery.h"
#include "util.h"
#include "sys.h"
#include "trace_gfs2.h"
@@ -124,6 +126,8 @@ static void gdlm_ast(void *arg)
switch (gl->gl_lksb.sb_status) {
case -DLM_EUNLOCK: /* Unlocked, so glock can be freed */
+ if (gl->gl_ops->go_free)
+ gl->gl_ops->go_free(gl);
gfs2_glock_free(gl);
return;
case -DLM_ECANCEL: /* Cancel while getting lock */
@@ -323,6 +327,7 @@ static void gdlm_cancel(struct gfs2_glock *gl)
/*
* dlm/gfs2 recovery coordination using dlm_recover callbacks
*
+ * 0. gfs2 checks for another cluster node withdraw, needing journal replay
* 1. dlm_controld sees lockspace members change
* 2. dlm_controld blocks dlm-kernel locking activity
* 3. dlm_controld within dlm-kernel notifies gfs2 (recover_prep)
@@ -571,6 +576,28 @@ static int control_lock(struct gfs2_sbd *sdp, int mode, uint32_t flags)
&ls->ls_control_lksb, "control_lock");
}
+/**
+ * remote_withdraw - react to a node withdrawing from the file system
+ * @sdp: The superblock
+ */
+static void remote_withdraw(struct gfs2_sbd *sdp)
+{
+ struct gfs2_jdesc *jd;
+ int ret = 0, count = 0;
+
+ list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
+ if (jd->jd_jid == sdp->sd_lockstruct.ls_jid)
+ continue;
+ ret = gfs2_recover_journal(jd, true);
+ if (ret)
+ break;
+ count++;
+ }
+
+ /* Now drop the additional reference we acquired */
+ fs_err(sdp, "Journals checked: %d, ret = %d.\n", count, ret);
+}
+
static void gfs2_control_func(struct work_struct *work)
{
struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_control_work.work);
@@ -581,6 +608,13 @@ static void gfs2_control_func(struct work_struct *work)
int recover_size;
int i, error;
+ /* First check for other nodes that may have done a withdraw. */
+ if (test_bit(SDF_REMOTE_WITHDRAW, &sdp->sd_flags)) {
+ remote_withdraw(sdp);
+ clear_bit(SDF_REMOTE_WITHDRAW, &sdp->sd_flags);
+ return;
+ }
+
spin_lock(&ls->ls_recover_spin);
/*
* No MOUNT_DONE means we're still mounting; control_mount()
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 0c3772974030..4b72abcf83b2 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -251,7 +251,8 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
struct buffer_head *bh, *bhs[2];
int num = 0;
- if (unlikely(gfs2_withdrawn(sdp))) {
+ if (unlikely(gfs2_withdrawn(sdp)) &&
+ (!sdp->sd_jdesc || (blkno != sdp->sd_jdesc->jd_no_addr))) {
*bhp = NULL;
return -EIO;
}
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 74389d856dd3..70d2abd000d8 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -656,7 +656,8 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
&gfs2_journal_glops,
- LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
+ LM_ST_EXCLUSIVE,
+ LM_FLAG_NOEXP | GL_NOCACHE,
&sdp->sd_journal_gh);
if (error) {
fs_err(sdp, "can't acquire journal glock: %d\n", error);
@@ -664,6 +665,7 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
}
ip = GFS2_I(sdp->sd_jdesc->jd_inode);
+ sdp->sd_jinode_gl = ip->i_gl;
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
&sdp->sd_jinode_gh);
@@ -724,10 +726,13 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
return 0;
fail_jinode_gh:
- if (!sdp->sd_args.ar_spectator)
+ /* A withdraw may have done dq/uninit so now we need to check it */
+ if (!sdp->sd_args.ar_spectator &&
+ gfs2_holder_initialized(&sdp->sd_jinode_gh))
gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
fail_journal_gh:
- if (!sdp->sd_args.ar_spectator)
+ if (!sdp->sd_args.ar_spectator &&
+ gfs2_holder_initialized(&sdp->sd_journal_gh))
gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
fail_jindex:
gfs2_jindex_free(sdp);
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index dbe87b2b55af..43ffe5997098 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -1541,6 +1541,8 @@ int gfs2_quotad(void *data)
while (!kthread_should_stop()) {
+ if (gfs2_withdrawn(sdp))
+ goto bypass;
/* Update the master statfs file */
if (sdp->sd_statfs_force_sync) {
int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
@@ -1561,6 +1563,7 @@ int gfs2_quotad(void *data)
try_to_freeze();
+bypass:
t = min(quotad_timeo, statfs_timeo);
prepare_to_wait(&sdp->sd_quota_wait, &wait, TASK_INTERRUPTIBLE);
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 68cc7c291a81..693c6d13473c 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -61,11 +61,13 @@ void gfs2_jindex_free(struct gfs2_sbd *sdp)
sdp->sd_journals = 0;
spin_unlock(&sdp->sd_jindex_spin);
+ sdp->sd_jdesc = NULL;
while (!list_empty(&list)) {
jd = list_entry(list.next, struct gfs2_jdesc, jd_list);
gfs2_free_journal_extents(jd);
list_del(&jd->jd_list);
iput(jd->jd_inode);
+ jd->jd_inode = NULL;
kfree(jd);
}
}
@@ -171,9 +173,13 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
goto fail_threads;
j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
+ if (gfs2_withdrawn(sdp)) {
+ error = -EIO;
+ goto fail;
+ }
error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
- if (error)
+ if (error || gfs2_withdrawn(sdp))
goto fail;
if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
@@ -187,7 +193,7 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
gfs2_log_pointers_init(sdp, head.lh_blkno);
error = gfs2_quota_init(sdp);
- if (error)
+ if (error || gfs2_withdrawn(sdp))
goto fail;
set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
@@ -599,34 +605,63 @@ out:
int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
{
struct gfs2_holder freeze_gh;
- int error;
-
- error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE,
- &freeze_gh);
- if (error && !gfs2_withdrawn(sdp))
- return error;
+ int error = 0;
+ int log_write_allowed = test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
+
+ gfs2_holder_mark_uninitialized(&freeze_gh);
+ if (sdp->sd_freeze_gl &&
+ !gfs2_glock_is_locked_by_me(sdp->sd_freeze_gl)) {
+ if (!log_write_allowed) {
+ error = gfs2_glock_nq_init(sdp->sd_freeze_gl,
+ LM_ST_SHARED, GL_NOCACHE |
+ LM_FLAG_TRY, &freeze_gh);
+ if (error == GLR_TRYFAILED)
+ error = 0;
+ } else {
+ error = gfs2_glock_nq_init(sdp->sd_freeze_gl,
+ LM_ST_SHARED, GL_NOCACHE,
+ &freeze_gh);
+ if (error && !gfs2_withdrawn(sdp))
+ return error;
+ }
+ }
flush_workqueue(gfs2_delete_workqueue);
- if (sdp->sd_quotad_process)
+ if (!log_write_allowed && current == sdp->sd_quotad_process)
+ fs_warn(sdp, "The quotad daemon is withdrawing.\n");
+ else if (sdp->sd_quotad_process)
kthread_stop(sdp->sd_quotad_process);
sdp->sd_quotad_process = NULL;
- if (sdp->sd_logd_process)
+
+ if (!log_write_allowed && current == sdp->sd_logd_process)
+ fs_warn(sdp, "The logd daemon is withdrawing.\n");
+ else if (sdp->sd_logd_process)
kthread_stop(sdp->sd_logd_process);
sdp->sd_logd_process = NULL;
- gfs2_quota_sync(sdp->sd_vfs, 0);
- gfs2_statfs_sync(sdp->sd_vfs, 0);
-
- gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN |
- GFS2_LFC_MAKE_FS_RO);
- wait_event(sdp->sd_reserving_log_wait, atomic_read(&sdp->sd_reserving_log) == 0);
- gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks);
+ if (log_write_allowed) {
+ gfs2_quota_sync(sdp->sd_vfs, 0);
+ gfs2_statfs_sync(sdp->sd_vfs, 0);
+ gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN |
+ GFS2_LFC_MAKE_FS_RO);
+ wait_event(sdp->sd_reserving_log_wait,
+ atomic_read(&sdp->sd_reserving_log) == 0);
+ gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) ==
+ sdp->sd_jdesc->jd_blocks);
+ } else {
+ wait_event_timeout(sdp->sd_reserving_log_wait,
+ atomic_read(&sdp->sd_reserving_log) == 0,
+ HZ * 5);
+ }
if (gfs2_holder_initialized(&freeze_gh))
gfs2_glock_dq_uninit(&freeze_gh);
gfs2_quota_cleanup(sdp);
+ if (!log_write_allowed)
+ sdp->sd_vfs->s_flags |= SB_RDONLY;
+
return error;
}
@@ -677,8 +712,10 @@ restart:
gfs2_glock_put(sdp->sd_freeze_gl);
if (!sdp->sd_args.ar_spectator) {
- gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
- gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
+ if (gfs2_holder_initialized(&sdp->sd_journal_gh))
+ gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
+ if (gfs2_holder_initialized(&sdp->sd_jinode_gh))
+ gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
iput(sdp->sd_sc_inode);
diff --git a/fs/gfs2/super.h b/fs/gfs2/super.h
index b8bf811a1305..51900554ed81 100644
--- a/fs/gfs2/super.h
+++ b/fs/gfs2/super.h
@@ -26,7 +26,6 @@ extern void gfs2_jindex_free(struct gfs2_sbd *sdp);
extern struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid);
extern int gfs2_jdesc_check(struct gfs2_jdesc *jd);
-
extern int gfs2_lookup_in_master_dir(struct gfs2_sbd *sdp, char *filename,
struct gfs2_inode **ipp);
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index a2eae5c578d6..d28c41bd69b0 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -435,6 +435,8 @@ int gfs2_recover_set(struct gfs2_sbd *sdp, unsigned jid)
* never clear the DFL_BLOCK_LOCKS flag, so all our locks would
* permanently stop working.
*/
+ if (!sdp->sd_jdesc)
+ goto out;
if (sdp->sd_jdesc->jd_jid == jid && !sdp->sd_args.ar_spectator)
goto out;
rv = -ENOENT;
diff --git a/fs/gfs2/util.c b/fs/gfs2/util.c
index 86965e6089c6..155a2249a32b 100644
--- a/fs/gfs2/util.c
+++ b/fs/gfs2/util.c
@@ -11,11 +11,14 @@
#include <linux/buffer_head.h>
#include <linux/crc32.h>
#include <linux/gfs2_ondisk.h>
+#include <linux/delay.h>
#include <linux/uaccess.h>
#include "gfs2.h"
#include "incore.h"
#include "glock.h"
+#include "glops.h"
+#include "log.h"
#include "lops.h"
#include "recovery.h"
#include "rgrp.h"
@@ -78,6 +81,167 @@ out_unlock:
return error;
}
+static void signal_our_withdraw(struct gfs2_sbd *sdp)
+{
+ struct gfs2_glock *gl = sdp->sd_live_gh.gh_gl;
+ struct inode *inode = sdp->sd_jdesc->jd_inode;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ u64 no_formal_ino = ip->i_no_formal_ino;
+ int ret = 0;
+ int tries;
+
+ if (test_bit(SDF_NORECOVERY, &sdp->sd_flags))
+ return;
+
+ /* Prevent any glock dq until withdraw recovery is complete */
+ set_bit(SDF_WITHDRAW_RECOVERY, &sdp->sd_flags);
+ /*
+ * Don't tell dlm we're bailing until we have no more buffers in the
+ * wind. If journal had an IO error, the log code should just purge
+ * the outstanding buffers rather than submitting new IO. Making the
+ * file system read-only will flush the journal, etc.
+ *
+ * During a normal unmount, gfs2_make_fs_ro calls gfs2_log_shutdown
+ * which clears SDF_JOURNAL_LIVE. In a withdraw, we must not write
+ * any UNMOUNT log header, so we can't call gfs2_log_shutdown, and
+ * therefore we need to clear SDF_JOURNAL_LIVE manually.
+ */
+ clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
+ if (!sb_rdonly(sdp->sd_vfs))
+ ret = gfs2_make_fs_ro(sdp);
+
+ /*
+ * Drop the glock for our journal so another node can recover it.
+ */
+ if (gfs2_holder_initialized(&sdp->sd_journal_gh)) {
+ gfs2_glock_dq_wait(&sdp->sd_journal_gh);
+ gfs2_holder_uninit(&sdp->sd_journal_gh);
+ }
+ sdp->sd_jinode_gh.gh_flags |= GL_NOCACHE;
+ gfs2_glock_dq(&sdp->sd_jinode_gh);
+ if (test_bit(SDF_FS_FROZEN, &sdp->sd_flags)) {
+ /* Make sure gfs2_unfreeze works if partially-frozen */
+ flush_workqueue(gfs2_freeze_wq);
+ atomic_set(&sdp->sd_freeze_state, SFS_FROZEN);
+ thaw_super(sdp->sd_vfs);
+ } else {
+ wait_on_bit(&gl->gl_flags, GLF_DEMOTE, TASK_UNINTERRUPTIBLE);
+ }
+
+ /*
+ * holder_uninit to force glock_put, to force dlm to let go
+ */
+ gfs2_holder_uninit(&sdp->sd_jinode_gh);
+
+ /*
+ * Note: We need to be careful here:
+ * Our iput of jd_inode will evict it. The evict will dequeue its
+ * glock, but the glock dq will wait for the withdraw unless we have
+ * exception code in glock_dq.
+ */
+ iput(inode);
+ /*
+ * Wait until the journal inode's glock is freed. This allows try locks
+ * on other nodes to be successful, otherwise we remain the owner of
+ * the glock as far as dlm is concerned.
+ */
+ if (gl->gl_ops->go_free) {
+ set_bit(GLF_FREEING, &gl->gl_flags);
+ wait_on_bit(&gl->gl_flags, GLF_FREEING, TASK_UNINTERRUPTIBLE);
+ }
+
+ if (sdp->sd_lockstruct.ls_ops->lm_lock == NULL) { /* lock_nolock */
+ clear_bit(SDF_WITHDRAW_RECOVERY, &sdp->sd_flags);
+ goto skip_recovery;
+ }
+ /*
+ * Dequeue the "live" glock, but keep a reference so it's never freed.
+ */
+ gfs2_glock_hold(gl);
+ gfs2_glock_dq_wait(&sdp->sd_live_gh);
+ /*
+ * We enqueue the "live" glock in EX so that all other nodes
+ * get a demote request and act on it. We don't really want the
+ * lock in EX, so we send a "try" lock with 1CB to produce a callback.
+ */
+ fs_warn(sdp, "Requesting recovery of jid %d.\n",
+ sdp->sd_lockstruct.ls_jid);
+ gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | LM_FLAG_NOEXP,
+ &sdp->sd_live_gh);
+ msleep(GL_GLOCK_MAX_HOLD);
+ /*
+ * This will likely fail in a cluster, but succeed standalone:
+ */
+ ret = gfs2_glock_nq(&sdp->sd_live_gh);
+
+ /*
+ * If we actually got the "live" lock in EX mode, there are no other
+ * nodes available to replay our journal. So we try to replay it
+ * ourselves. We hold the "live" glock to prevent other mounters
+ * during recovery, then just dequeue it and reacquire it in our
+ * normal SH mode. Just in case the problem that caused us to
+ * withdraw prevents us from recovering our journal (e.g. io errors
+ * and such) we still check if the journal is clean before proceeding
+ * but we may wait forever until another mounter does the recovery.
+ */
+ if (ret == 0) {
+ fs_warn(sdp, "No other mounters found. Trying to recover our "
+ "own journal jid %d.\n", sdp->sd_lockstruct.ls_jid);
+ if (gfs2_recover_journal(sdp->sd_jdesc, 1))
+ fs_warn(sdp, "Unable to recover our journal jid %d.\n",
+ sdp->sd_lockstruct.ls_jid);
+ gfs2_glock_dq_wait(&sdp->sd_live_gh);
+ gfs2_holder_reinit(LM_ST_SHARED, LM_FLAG_NOEXP | GL_EXACT,
+ &sdp->sd_live_gh);
+ gfs2_glock_nq(&sdp->sd_live_gh);
+ }
+
+ gfs2_glock_queue_put(gl); /* drop the extra reference we acquired */
+ clear_bit(SDF_WITHDRAW_RECOVERY, &sdp->sd_flags);
+
+ /*
+ * At this point our journal is evicted, so we need to get a new inode
+ * for it. Once done, we need to call gfs2_find_jhead which
+ * calls gfs2_map_journal_extents to map it for us again.
+ *
+ * Note that we don't really want it to look up a FREE block. The
+ * GFS2_BLKST_FREE simply overrides a block check in gfs2_inode_lookup
+ * which would otherwise fail because it requires grabbing an rgrp
+ * glock, which would fail with -EIO because we're withdrawing.
+ */
+ inode = gfs2_inode_lookup(sdp->sd_vfs, DT_UNKNOWN,
+ sdp->sd_jdesc->jd_no_addr, no_formal_ino,
+ GFS2_BLKST_FREE);
+ if (IS_ERR(inode)) {
+ fs_warn(sdp, "Reprocessing of jid %d failed with %ld.\n",
+ sdp->sd_lockstruct.ls_jid, PTR_ERR(inode));
+ goto skip_recovery;
+ }
+ sdp->sd_jdesc->jd_inode = inode;
+
+ /*
+ * Now wait until recovery is complete.
+ */
+ for (tries = 0; tries < 10; tries++) {
+ ret = check_journal_clean(sdp, sdp->sd_jdesc);
+ if (!ret)
+ break;
+ msleep(HZ);
+ fs_warn(sdp, "Waiting for journal recovery jid %d.\n",
+ sdp->sd_lockstruct.ls_jid);
+ }
+skip_recovery:
+ if (!ret)
+ fs_warn(sdp, "Journal recovery complete for jid %d.\n",
+ sdp->sd_lockstruct.ls_jid);
+ else
+ fs_warn(sdp, "Journal recovery skipped for %d until next "
+ "mount.\n", sdp->sd_lockstruct.ls_jid);
+ fs_warn(sdp, "Glock dequeues delayed: %lu\n", sdp->sd_glock_dqs_held);
+ sdp->sd_glock_dqs_held = 0;
+ wake_up_bit(&sdp->sd_flags, SDF_WITHDRAW_RECOVERY);
+}
+
void gfs2_lm(struct gfs2_sbd *sdp, const char *fmt, ...)
{
struct va_format vaf;
@@ -100,13 +264,23 @@ int gfs2_withdraw(struct gfs2_sbd *sdp)
const struct lm_lockops *lm = ls->ls_ops;
if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
- test_and_set_bit(SDF_WITHDRAWN, &sdp->sd_flags))
- return 0;
+ test_and_set_bit(SDF_WITHDRAWN, &sdp->sd_flags)) {
+ if (!test_bit(SDF_WITHDRAW_IN_PROG, &sdp->sd_flags))
+ return -1;
+
+ wait_on_bit(&sdp->sd_flags, SDF_WITHDRAW_IN_PROG,
+ TASK_UNINTERRUPTIBLE);
+ return -1;
+ }
+
+ set_bit(SDF_WITHDRAW_IN_PROG, &sdp->sd_flags);
if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
fs_err(sdp, "about to withdraw this file system\n");
BUG_ON(sdp->sd_args.ar_debug);
+ signal_our_withdraw(sdp);
+
kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
if (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
@@ -117,8 +291,11 @@ int gfs2_withdraw(struct gfs2_sbd *sdp)
lm->lm_unmount(sdp);
}
set_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags);
- fs_err(sdp, "withdrawn\n");
+ fs_err(sdp, "File system withdrawn\n");
dump_stack();
+ clear_bit(SDF_WITHDRAW_IN_PROG, &sdp->sd_flags);
+ smp_mb__after_atomic();
+ wake_up_bit(&sdp->sd_flags, SDF_WITHDRAW_IN_PROG);
}
if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
generated by cgit (git 2.34.1) at 2024-06-19 18:58:54 +0000