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-rw-r--r--fs/Kconfig2
-rw-r--r--fs/configfs/dir.c2
-rw-r--r--fs/ocfs2/cluster/heartbeat.c40
-rw-r--r--fs/ocfs2/dlm/userdlm.c74
-rw-r--r--fs/ocfs2/file.c19
5 files changed, 101 insertions, 36 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index e207be68d4c..97f31741312 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -861,7 +861,7 @@ config RAMFS
config CONFIGFS_FS
tristate "Userspace-driven configuration filesystem (EXPERIMENTAL)"
- depends on EXPERIMENTAL
+ depends on SYSFS && EXPERIMENTAL
help
configfs is a ram-based filesystem that provides the converse
of sysfs's functionality. Where sysfs is a filesystem-based
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 8ed9b06a982..5638c8f9362 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -504,7 +504,7 @@ static int populate_groups(struct config_group *group)
int ret = 0;
int i;
- if (group && group->default_groups) {
+ if (group->default_groups) {
/* FYI, we're faking mkdir here
* I'm not sure we need this semaphore, as we're called
* from our parent's mkdir. That holds our parent's
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index bff0f0d0686..21f38accd03 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -153,6 +153,7 @@ struct o2hb_region {
struct o2hb_bio_wait_ctxt {
atomic_t wc_num_reqs;
struct completion wc_io_complete;
+ int wc_error;
};
static void o2hb_write_timeout(void *arg)
@@ -186,6 +187,7 @@ static inline void o2hb_bio_wait_init(struct o2hb_bio_wait_ctxt *wc,
{
atomic_set(&wc->wc_num_reqs, num_ios);
init_completion(&wc->wc_io_complete);
+ wc->wc_error = 0;
}
/* Used in error paths too */
@@ -218,8 +220,10 @@ static int o2hb_bio_end_io(struct bio *bio,
{
struct o2hb_bio_wait_ctxt *wc = bio->bi_private;
- if (error)
+ if (error) {
mlog(ML_ERROR, "IO Error %d\n", error);
+ wc->wc_error = error;
+ }
if (bio->bi_size)
return 1;
@@ -390,6 +394,8 @@ static int o2hb_read_slots(struct o2hb_region *reg,
bail_and_wait:
o2hb_wait_on_io(reg, &wc);
+ if (wc.wc_error && !status)
+ status = wc.wc_error;
if (bios) {
for(i = 0; i < num_bios; i++)
@@ -790,20 +796,24 @@ static int o2hb_highest_node(unsigned long *nodes,
return highest;
}
-static void o2hb_do_disk_heartbeat(struct o2hb_region *reg)
+static int o2hb_do_disk_heartbeat(struct o2hb_region *reg)
{
int i, ret, highest_node, change = 0;
unsigned long configured_nodes[BITS_TO_LONGS(O2NM_MAX_NODES)];
struct bio *write_bio;
struct o2hb_bio_wait_ctxt write_wc;
- if (o2nm_configured_node_map(configured_nodes, sizeof(configured_nodes)))
- return;
+ ret = o2nm_configured_node_map(configured_nodes,
+ sizeof(configured_nodes));
+ if (ret) {
+ mlog_errno(ret);
+ return ret;
+ }
highest_node = o2hb_highest_node(configured_nodes, O2NM_MAX_NODES);
if (highest_node >= O2NM_MAX_NODES) {
mlog(ML_NOTICE, "ocfs2_heartbeat: no configured nodes found!\n");
- return;
+ return -EINVAL;
}
/* No sense in reading the slots of nodes that don't exist
@@ -813,7 +823,7 @@ static void o2hb_do_disk_heartbeat(struct o2hb_region *reg)
ret = o2hb_read_slots(reg, highest_node + 1);
if (ret < 0) {
mlog_errno(ret);
- return;
+ return ret;
}
/* With an up to date view of the slots, we can check that no
@@ -831,7 +841,7 @@ static void o2hb_do_disk_heartbeat(struct o2hb_region *reg)
ret = o2hb_issue_node_write(reg, &write_bio, &write_wc);
if (ret < 0) {
mlog_errno(ret);
- return;
+ return ret;
}
i = -1;
@@ -847,6 +857,15 @@ static void o2hb_do_disk_heartbeat(struct o2hb_region *reg)
*/
o2hb_wait_on_io(reg, &write_wc);
bio_put(write_bio);
+ if (write_wc.wc_error) {
+ /* Do not re-arm the write timeout on I/O error - we
+ * can't be sure that the new block ever made it to
+ * disk */
+ mlog(ML_ERROR, "Write error %d on device \"%s\"\n",
+ write_wc.wc_error, reg->hr_dev_name);
+ return write_wc.wc_error;
+ }
+
o2hb_arm_write_timeout(reg);
/* let the person who launched us know when things are steady */
@@ -854,6 +873,8 @@ static void o2hb_do_disk_heartbeat(struct o2hb_region *reg)
if (atomic_dec_and_test(&reg->hr_steady_iterations))
wake_up(&o2hb_steady_queue);
}
+
+ return 0;
}
/* Subtract b from a, storing the result in a. a *must* have a larger
@@ -913,7 +934,10 @@ static int o2hb_thread(void *data)
* likely to time itself out. */
do_gettimeofday(&before_hb);
- o2hb_do_disk_heartbeat(reg);
+ i = 0;
+ do {
+ ret = o2hb_do_disk_heartbeat(reg);
+ } while (ret && ++i < 2);
do_gettimeofday(&after_hb);
elapsed_msec = o2hb_elapsed_msecs(&before_hb, &after_hb);
diff --git a/fs/ocfs2/dlm/userdlm.c b/fs/ocfs2/dlm/userdlm.c
index c3764f4744e..74ca4e5f976 100644
--- a/fs/ocfs2/dlm/userdlm.c
+++ b/fs/ocfs2/dlm/userdlm.c
@@ -139,6 +139,10 @@ static void user_ast(void *opaque)
return;
}
+ mlog_bug_on_msg(lockres->l_requested == LKM_IVMODE,
+ "Lockres %s, requested ivmode. flags 0x%x\n",
+ lockres->l_name, lockres->l_flags);
+
/* we're downconverting. */
if (lockres->l_requested < lockres->l_level) {
if (lockres->l_requested <=
@@ -229,23 +233,42 @@ static void user_unlock_ast(void *opaque, enum dlm_status status)
mlog(0, "UNLOCK AST called on lock %s\n", lockres->l_name);
- if (status != DLM_NORMAL)
+ if (status != DLM_NORMAL && status != DLM_CANCELGRANT)
mlog(ML_ERROR, "Dlm returns status %d\n", status);
spin_lock(&lockres->l_lock);
- if (lockres->l_flags & USER_LOCK_IN_TEARDOWN)
+ /* The teardown flag gets set early during the unlock process,
+ * so test the cancel flag to make sure that this ast isn't
+ * for a concurrent cancel. */
+ if (lockres->l_flags & USER_LOCK_IN_TEARDOWN
+ && !(lockres->l_flags & USER_LOCK_IN_CANCEL)) {
lockres->l_level = LKM_IVMODE;
- else {
+ } else if (status == DLM_CANCELGRANT) {
+ mlog(0, "Lock %s, cancel fails, flags 0x%x\n",
+ lockres->l_name, lockres->l_flags);
+ /* We tried to cancel a convert request, but it was
+ * already granted. Don't clear the busy flag - the
+ * ast should've done this already. */
+ BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
+ lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
+ goto out_noclear;
+ } else {
+ BUG_ON(!(lockres->l_flags & USER_LOCK_IN_CANCEL));
+ /* Cancel succeeded, we want to re-queue */
+ mlog(0, "Lock %s, cancel succeeds, flags 0x%x\n",
+ lockres->l_name, lockres->l_flags);
lockres->l_requested = LKM_IVMODE; /* cancel an
* upconvert
* request. */
lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
/* we want the unblock thread to look at it again
* now. */
- __user_dlm_queue_lockres(lockres);
+ if (lockres->l_flags & USER_LOCK_BLOCKED)
+ __user_dlm_queue_lockres(lockres);
}
lockres->l_flags &= ~USER_LOCK_BUSY;
+out_noclear:
spin_unlock(&lockres->l_lock);
wake_up(&lockres->l_event);
@@ -268,13 +291,26 @@ static void user_dlm_unblock_lock(void *opaque)
spin_lock(&lockres->l_lock);
- BUG_ON(!(lockres->l_flags & USER_LOCK_BLOCKED));
- BUG_ON(!(lockres->l_flags & USER_LOCK_QUEUED));
+ mlog_bug_on_msg(!(lockres->l_flags & USER_LOCK_QUEUED),
+ "Lockres %s, flags 0x%x\n",
+ lockres->l_name, lockres->l_flags);
- /* notice that we don't clear USER_LOCK_BLOCKED here. That's
- * for user_ast to do. */
+ /* notice that we don't clear USER_LOCK_BLOCKED here. If it's
+ * set, we want user_ast clear it. */
lockres->l_flags &= ~USER_LOCK_QUEUED;
+ /* It's valid to get here and no longer be blocked - if we get
+ * several basts in a row, we might be queued by the first
+ * one, the unblock thread might run and clear the queued
+ * flag, and finally we might get another bast which re-queues
+ * us before our ast for the downconvert is called. */
+ if (!(lockres->l_flags & USER_LOCK_BLOCKED)) {
+ mlog(0, "Lockres %s, flags 0x%x: queued but not blocking\n",
+ lockres->l_name, lockres->l_flags);
+ spin_unlock(&lockres->l_lock);
+ goto drop_ref;
+ }
+
if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
mlog(0, "lock is in teardown so we do nothing\n");
spin_unlock(&lockres->l_lock);
@@ -282,7 +318,9 @@ static void user_dlm_unblock_lock(void *opaque)
}
if (lockres->l_flags & USER_LOCK_BUSY) {
- mlog(0, "BUSY flag detected...\n");
+ mlog(0, "Cancel lock %s, flags 0x%x\n",
+ lockres->l_name, lockres->l_flags);
+
if (lockres->l_flags & USER_LOCK_IN_CANCEL) {
spin_unlock(&lockres->l_lock);
goto drop_ref;
@@ -296,14 +334,7 @@ static void user_dlm_unblock_lock(void *opaque)
LKM_CANCEL,
user_unlock_ast,
lockres);
- if (status == DLM_CANCELGRANT) {
- /* If we got this, then the ast was fired
- * before we could cancel. We cleanup our
- * state, and restart the function. */
- spin_lock(&lockres->l_lock);
- lockres->l_flags &= ~USER_LOCK_IN_CANCEL;
- spin_unlock(&lockres->l_lock);
- } else if (status != DLM_NORMAL)
+ if (status != DLM_NORMAL)
user_log_dlm_error("dlmunlock", status, lockres);
goto drop_ref;
}
@@ -581,6 +612,14 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
mlog(0, "asked to destroy %s\n", lockres->l_name);
spin_lock(&lockres->l_lock);
+ if (lockres->l_flags & USER_LOCK_IN_TEARDOWN) {
+ mlog(0, "Lock is already torn down\n");
+ spin_unlock(&lockres->l_lock);
+ return 0;
+ }
+
+ lockres->l_flags |= USER_LOCK_IN_TEARDOWN;
+
while (lockres->l_flags & USER_LOCK_BUSY) {
spin_unlock(&lockres->l_lock);
@@ -606,7 +645,6 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
lockres->l_flags &= ~USER_LOCK_ATTACHED;
lockres->l_flags |= USER_LOCK_BUSY;
- lockres->l_flags |= USER_LOCK_IN_TEARDOWN;
spin_unlock(&lockres->l_lock);
mlog(0, "unlocking lockres %s\n", lockres->l_name);
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 34e903a6a46..581eb451a41 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -260,6 +260,17 @@ static int ocfs2_truncate_file(struct inode *inode,
if (new_i_size == le64_to_cpu(fe->i_size))
goto bail;
+ /* This forces other nodes to sync and drop their pages. Do
+ * this even if we have a truncate without allocation change -
+ * ocfs2 cluster sizes can be much greater than page size, so
+ * we have to truncate them anyway. */
+ status = ocfs2_data_lock(inode, 1);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ ocfs2_data_unlock(inode, 1);
+
if (le32_to_cpu(fe->i_clusters) ==
ocfs2_clusters_for_bytes(osb->sb, new_i_size)) {
mlog(0, "fe->i_clusters = %u, so we do a simple truncate\n",
@@ -272,14 +283,6 @@ static int ocfs2_truncate_file(struct inode *inode,
goto bail;
}
- /* This forces other nodes to sync and drop their pages */
- status = ocfs2_data_lock(inode, 1);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- ocfs2_data_unlock(inode, 1);
-
/* alright, we're going to need to do a full blown alloc size
* change. Orphan the inode so that recovery can complete the
* truncate if necessary. This does the task of marking
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 10:00:22 +0000