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authorPranith Kumar K <pkarampu@redhat.com>2019-04-04 15:31:56 +0530
committerPranith Kumar Karampuri <pkarampu@redhat.com>2019-04-15 06:02:22 +0000
commit8239efc76b56f1f4ce16bab263f7b355d8205820 (patch)
tree4e73e82e017bcdcb6a1bec02ad85a721aebca7dd /xlators/cluster/afr
parent798aadbe51a9a02dd98a0f861cc239ecf7c8ed57 (diff)
cluster/afr: Remove local from owners_list on failure of lock-acquisition
When eager-lock lock acquisition fails because of say network failures, the local is not being removed from owners_list, this leads to accumulation of waiting frames and the application will hang because the waiting frames are under the assumption that another transaction is in the process of acquiring lock because owner-list is not empty. Handled this case as well in this patch. Added asserts to make it easier to find these problems in future. fixes bz#1696599 Change-Id: I3101393265e9827755725b1f2d94a93d8709e923 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Diffstat (limited to 'xlators/cluster/afr')
-rw-r--r--xlators/cluster/afr/src/afr-common.c8
-rw-r--r--xlators/cluster/afr/src/afr-lk-common.c1
-rw-r--r--xlators/cluster/afr/src/afr-transaction.c19
-rw-r--r--xlators/cluster/afr/src/afr.h4
4 files changed, 14 insertions, 18 deletions
diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
index 9adab10..d671b56 100644
--- a/xlators/cluster/afr/src/afr-common.c
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -5770,6 +5770,10 @@ afr_transaction_local_init(afr_local_t *local, xlator_t *this)
afr_private_t *priv = NULL;
priv = this->private;
+ INIT_LIST_HEAD(&local->transaction.wait_list);
+ INIT_LIST_HEAD(&local->transaction.owner_list);
+ INIT_LIST_HEAD(&local->ta_waitq);
+ INIT_LIST_HEAD(&local->ta_onwireq);
ret = afr_internal_lock_init(&local->internal_lock, priv->child_count);
if (ret < 0)
goto out;
@@ -5807,10 +5811,6 @@ afr_transaction_local_init(afr_local_t *local, xlator_t *this)
goto out;
ret = 0;
- INIT_LIST_HEAD(&local->transaction.wait_list);
- INIT_LIST_HEAD(&local->transaction.owner_list);
- INIT_LIST_HEAD(&local->ta_waitq);
- INIT_LIST_HEAD(&local->ta_onwireq);
out:
return ret;
}
diff --git a/xlators/cluster/afr/src/afr-lk-common.c b/xlators/cluster/afr/src/afr-lk-common.c
index 4091671..bc8eabe 100644
--- a/xlators/cluster/afr/src/afr-lk-common.c
+++ b/xlators/cluster/afr/src/afr-lk-common.c
@@ -397,7 +397,6 @@ afr_unlock_now(call_frame_t *frame, xlator_t *this)
int_lock->lk_call_count = call_count;
if (!call_count) {
- GF_ASSERT(!local->transaction.do_eager_unlock);
gf_msg_trace(this->name, 0, "No internal locks unlocked");
int_lock->lock_cbk(frame, this);
goto out;
diff --git a/xlators/cluster/afr/src/afr-transaction.c b/xlators/cluster/afr/src/afr-transaction.c
index defea0e..8c59fd2 100644
--- a/xlators/cluster/afr/src/afr-transaction.c
+++ b/xlators/cluster/afr/src/afr-transaction.c
@@ -372,6 +372,8 @@ afr_transaction_done(call_frame_t *frame, xlator_t *this)
}
local->transaction.unwind(frame, this);
+ GF_ASSERT(list_empty(&local->transaction.owner_list));
+ GF_ASSERT(list_empty(&local->transaction.wait_list));
AFR_STACK_DESTROY(frame);
return 0;
@@ -393,7 +395,7 @@ afr_lock_fail_shared(afr_local_t *local, struct list_head *list)
}
static void
-afr_handle_lock_acquire_failure(afr_local_t *local, gf_boolean_t locked)
+afr_handle_lock_acquire_failure(afr_local_t *local)
{
struct list_head shared;
afr_lock_t *lock = NULL;
@@ -414,13 +416,8 @@ afr_handle_lock_acquire_failure(afr_local_t *local, gf_boolean_t locked)
afr_lock_fail_shared(local, &shared);
local->transaction.do_eager_unlock = _gf_true;
out:
- if (locked) {
- local->internal_lock.lock_cbk = afr_transaction_done;
- afr_unlock(local->transaction.frame, local->transaction.frame->this);
- } else {
- afr_transaction_done(local->transaction.frame,
- local->transaction.frame->this);
- }
+ local->internal_lock.lock_cbk = afr_transaction_done;
+ afr_unlock(local->transaction.frame, local->transaction.frame->this);
}
call_frame_t *
@@ -619,7 +616,7 @@ afr_transaction_perform_fop(call_frame_t *frame, xlator_t *this)
failure_count = AFR_COUNT(local->transaction.failed_subvols,
priv->child_count);
if (failure_count == priv->child_count) {
- afr_handle_lock_acquire_failure(local, _gf_true);
+ afr_handle_lock_acquire_failure(local);
return 0;
} else {
lock = &local->inode_ctx->lock[local->transaction.type];
@@ -2092,7 +2089,7 @@ err:
local->op_ret = -1;
local->op_errno = op_errno;
- afr_handle_lock_acquire_failure(local, _gf_true);
+ afr_handle_lock_acquire_failure(local);
if (xdata_req)
dict_unref(xdata_req);
@@ -2361,7 +2358,7 @@ afr_internal_lock_finish(call_frame_t *frame, xlator_t *this)
} else {
lock = &local->inode_ctx->lock[local->transaction.type];
if (local->internal_lock.lock_op_ret < 0) {
- afr_handle_lock_acquire_failure(local, _gf_false);
+ afr_handle_lock_acquire_failure(local);
} else {
lock->event_generation = local->event_generation;
afr_changelog_pre_op(frame, this);
diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h
index a044b2f..33e78c1 100644
--- a/xlators/cluster/afr/src/afr.h
+++ b/xlators/cluster/afr/src/afr.h
@@ -1089,8 +1089,8 @@ afr_cleanup_fd_ctx(xlator_t *this, fd_t *fd);
#define AFR_FRAME_INIT(frame, op_errno) \
({ \
frame->local = mem_get0(THIS->local_pool); \
- if (afr_local_init(frame->local, THIS->private, &op_errno)) { \
- afr_local_cleanup(frame->local, THIS); \
+ if (afr_local_init(frame->local, frame->this->private, &op_errno)) { \
+ afr_local_cleanup(frame->local, frame->this); \
mem_put(frame->local); \
frame->local = NULL; \
}; \