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-rw-r--r--xlators/cluster/afr/src/afr-transaction.c147
1 files changed, 146 insertions, 1 deletions
diff --git a/xlators/cluster/afr/src/afr-transaction.c b/xlators/cluster/afr/src/afr-transaction.c
index 0e9956d7b..c4378d445 100644
--- a/xlators/cluster/afr/src/afr-transaction.c
+++ b/xlators/cluster/afr/src/afr-transaction.c
@@ -11,6 +11,7 @@
#include "dict.h"
#include "byte-order.h"
#include "common-utils.h"
+#include "timer.h"
#include "afr.h"
#include "afr-transaction.h"
@@ -523,7 +524,7 @@ afr_set_postop_dict (afr_local_t *local, xlator_t *this, dict_t *xattr,
}
int
-afr_changelog_post_op (call_frame_t *frame, xlator_t *this)
+afr_changelog_post_op_now (call_frame_t *frame, xlator_t *this)
{
afr_private_t * priv = this->private;
afr_internal_lock_t *int_lock = NULL;
@@ -877,6 +878,8 @@ afr_changelog_pre_op (call_frame_t *frame, xlator_t *this)
}
UNLOCK (&local->fd->lock);
+ afr_set_delayed_post_op (frame, this);
+
if (piggyback)
afr_changelog_pre_op_cbk (frame, (void *)(long)i,
this, 1, 0, xattr[i],
@@ -1243,16 +1246,158 @@ afr_internal_lock_finish (call_frame_t *frame, xlator_t *this)
}
+void
+afr_set_delayed_post_op (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_private_t *priv = NULL;
+
+ /* call this function from any of the related optimizations
+ which benefit from delaying post op are enabled, namely:
+
+ - changelog piggybacking
+ - eager locking
+ */
+
+ priv = this->private;
+ if (!priv)
+ return;
+
+ if (!priv->post_op_delay_secs)
+ return;
+
+ local = frame->local;
+ if (!local)
+ return;
+
+ if (!local->fd)
+ return;
+
+ if (local->op == GF_FOP_WRITE)
+ local->delayed_post_op = _gf_true;
+}
+
+
+gf_boolean_t
+is_afr_delayed_changelog_post_op_needed (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ gf_boolean_t res = _gf_false;
+
+ local = frame->local;
+ if (!local)
+ goto out;
+
+ if (!local->delayed_post_op)
+ goto out;
+
+ res = _gf_true;
+out:
+ return res;
+}
+
+
+void
+afr_delayed_changelog_post_op (xlator_t *this, call_frame_t *frame, fd_t *fd);
+
+void
+afr_delayed_changelog_wake_up (xlator_t *this, fd_t *fd);
+
+void
+afr_delayed_changelog_wake_up_cbk (void *data)
+{
+ fd_t *fd = NULL;
+
+ fd = data;
+
+ afr_delayed_changelog_wake_up (THIS, fd);
+}
+
+
+void
+afr_delayed_changelog_post_op (xlator_t *this, call_frame_t *frame, fd_t *fd)
+{
+ afr_fd_ctx_t *fd_ctx = NULL;
+ call_frame_t *prev_frame = NULL;
+ struct timeval delta = {0, };
+ afr_private_t *priv = NULL;
+
+ priv = this->private;
+
+ fd_ctx = afr_fd_ctx_get (fd, this);
+ if (!fd_ctx)
+ return;
+
+ delta.tv_sec = priv->post_op_delay_secs;
+ delta.tv_usec = 0;
+
+ pthread_mutex_lock (&fd_ctx->delay_lock);
+ {
+ prev_frame = fd_ctx->delay_frame;
+ fd_ctx->delay_frame = NULL;
+ if (fd_ctx->delay_timer)
+ gf_timer_call_cancel (this->ctx, fd_ctx->delay_timer);
+ fd_ctx->delay_timer = NULL;
+ if (!frame)
+ goto unlock;
+ fd_ctx->delay_timer = gf_timer_call_after (this->ctx, delta,
+ afr_delayed_changelog_wake_up_cbk,
+ fd);
+ fd_ctx->delay_frame = frame;
+ }
+unlock:
+ pthread_mutex_unlock (&fd_ctx->delay_lock);
+
+ if (prev_frame) {
+ afr_changelog_post_op_now (prev_frame, this);
+ }
+}
+
+
+void
+afr_changelog_post_op (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+
+ local = frame->local;
+
+ if (is_afr_delayed_changelog_post_op_needed (frame, this))
+ afr_delayed_changelog_post_op (this, frame, local->fd);
+ else
+ afr_changelog_post_op_now (frame, this);
+}
+
+
+void
+afr_delayed_changelog_wake_up (xlator_t *this, fd_t *fd)
+{
+ afr_delayed_changelog_post_op (this, NULL, fd);
+}
+
+
int
afr_transaction_resume (call_frame_t *frame, xlator_t *this)
{
afr_internal_lock_t *int_lock = NULL;
afr_local_t *local = NULL;
afr_private_t *priv = NULL;
+ fd_t *fd = NULL;
local = frame->local;
int_lock = &local->internal_lock;
priv = this->private;
+ fd = local->fd;
+
+ if (fd)
+ /* The wake up needs to happen independent of
+ what type of fop arrives here. If it was
+ a write, then it has already inherited the
+ lock and changelog. If it was not a write,
+ then the presumption of the optimization (of
+ optimizing for successive write operations)
+ fails.
+ */
+ afr_delayed_changelog_wake_up (this, fd);
afr_restore_lk_owner (frame);