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-rw-r--r--xlators/cluster/afr/src/afr-common.c244
-rw-r--r--xlators/cluster/afr/src/afr.h2
2 files changed, 186 insertions, 60 deletions
diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
index 2cbd0ce4c90..f39db802588 100644
--- a/xlators/cluster/afr/src/afr-common.c
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -1039,6 +1039,10 @@ afr_local_cleanup (afr_local_t *local, xlator_t *this)
dict_unref (local->cont.readdir.dict);
}
+ { /* inodelk */
+ GF_FREE (local->cont.inodelk.volume);
+ }
+
if (local->xdata_req)
dict_unref (local->xdata_req);
@@ -2766,8 +2770,9 @@ out:
/* }}} */
int32_t
-afr_unlock_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
- int32_t op_ret, int32_t op_errno, dict_t *xdata)
+afr_unlock_partial_inodelk_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret,
+ int32_t op_errno, dict_t *xdata)
{
afr_local_t *local = NULL;
@@ -2817,7 +2822,7 @@ afr_unlock_inodelks_and_unwind (call_frame_t *frame, xlator_t *this,
if (local->replies[i].op_ret == -1)
continue;
- STACK_WIND_COOKIE (frame, afr_unlock_inodelk_cbk,
+ STACK_WIND_COOKIE (frame, afr_unlock_partial_inodelk_cbk,
(void*) (long) i,
priv->children[i],
priv->children[i]->fops->inodelk,
@@ -2833,20 +2838,61 @@ afr_unlock_inodelks_and_unwind (call_frame_t *frame, xlator_t *this,
}
int32_t
-afr_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
- int32_t op_ret, int32_t op_errno, dict_t *xdata)
-
+afr_inodelk_done (call_frame_t *frame, xlator_t *this)
{
- afr_local_t *local = NULL;
- afr_private_t *priv = NULL;
- int call_count = -1;
- int child_index = (long)cookie;
int i = 0;
int lock_count = 0;
+ afr_local_t *local = NULL;
+ afr_private_t *priv = NULL;
+
local = frame->local;
priv = this->private;
+ for (i = 0; i < priv->child_count; i++) {
+ if (!local->replies[i].valid)
+ continue;
+
+ if (local->replies[i].op_ret == 0)
+ lock_count++;
+
+ if (local->op_ret == -1 && local->op_errno == EAGAIN)
+ continue;
+
+ if ((local->replies[i].op_ret == -1) &&
+ (local->replies[i].op_errno == EAGAIN)) {
+ local->op_ret = -1;
+ local->op_errno = EAGAIN;
+ continue;
+ }
+
+ if (local->replies[i].op_ret == 0)
+ local->op_ret = 0;
+
+ local->op_errno = local->replies[i].op_errno;
+ }
+
+ if (lock_count && local->cont.inodelk.flock.l_type != F_UNLCK &&
+ (local->op_ret == -1 && local->op_errno == EAGAIN)) {
+ afr_unlock_inodelks_and_unwind (frame, this,
+ lock_count);
+ } else {
+ AFR_STACK_UNWIND (inodelk, frame, local->op_ret,
+ local->op_errno, local->xdata_rsp);
+ }
+
+ return 0;
+}
+
+int
+afr_common_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, dict_t *xdata)
+{
+ afr_local_t *local = NULL;
+ int child_index = (long)cookie;
+
+ local = frame->local;
+
local->replies[child_index].valid = 1;
local->replies[child_index].op_ret = op_ret;
local->replies[child_index].op_errno = op_errno;
@@ -2859,86 +2905,166 @@ afr_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
}
UNLOCK (&frame->lock);
}
+ return 0;
+}
+
+static int32_t
+afr_parallel_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, dict_t *xdata)
+
+{
+ int call_count = 0;
+
+ afr_common_inodelk_cbk (frame, cookie, this, op_ret, op_errno, xdata);
call_count = afr_frame_return (frame);
+ if (call_count == 0)
+ afr_inodelk_done (frame, this);
- if (call_count == 0) {
- for (i = 0; i < priv->child_count; i++) {
- if (!local->replies[i].valid)
- continue;
+ return 0;
+}
- if (local->replies[i].op_ret == 0)
- lock_count++;
+static inline gf_boolean_t
+afr_is_conflicting_lock_present (int32_t op_ret, int32_t op_errno)
+{
+ if (op_ret == -1 && op_errno == EAGAIN)
+ return _gf_true;
+ return _gf_false;
+}
- if (local->op_ret == -1 && local->op_errno == EAGAIN)
- continue;
+static int32_t
+afr_serialized_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, dict_t *xdata)
- if ((local->replies[i].op_ret == -1) &&
- (local->replies[i].op_errno == EAGAIN)) {
- local->op_ret = -1;
- local->op_errno = EAGAIN;
- continue;
- }
+{
+ afr_local_t *local = NULL;
+ afr_private_t *priv = NULL;
+ int child_index = (long)cookie;
+ int next_child = 0;
- if (local->replies[i].op_ret == 0)
- local->op_ret = 0;
+ local = frame->local;
+ priv = this->private;
- local->op_errno = local->replies[i].op_errno;
- }
+ afr_common_inodelk_cbk (frame, cookie, this, op_ret, op_errno, xdata);
- if (lock_count && local->cont.inodelk.flock.l_type != F_UNLCK &&
- (local->op_ret == -1 && local->op_errno == EAGAIN)) {
- afr_unlock_inodelks_and_unwind (frame, this,
- lock_count);
- } else {
- AFR_STACK_UNWIND (inodelk, frame, local->op_ret,
- local->op_errno, local->xdata_rsp);
- }
+ for (next_child = child_index + 1; next_child < priv->child_count;
+ next_child++) {
+ if (local->child_up[next_child])
+ break;
}
+ if (afr_is_conflicting_lock_present (op_ret, op_errno) ||
+ (next_child == priv->child_count)) {
+ afr_inodelk_done (frame, this);
+ } else {
+ STACK_WIND_COOKIE (frame, afr_serialized_inodelk_cbk,
+ (void *) (long) next_child,
+ priv->children[next_child],
+ priv->children[next_child]->fops->inodelk,
+ (const char *)local->cont.inodelk.volume,
+ &local->loc, local->cont.inodelk.cmd,
+ &local->cont.inodelk.flock,
+ local->xdata_req);
+ }
+
+ return 0;
+}
+
+static int
+afr_parallel_inodelk_wind (call_frame_t *frame, xlator_t *this)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+ int call_count = 0;
+ int i = 0;
+
+ priv = this->private;
+ local = frame->local;
+ call_count = local->call_count;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (!local->child_up[i])
+ continue;
+ STACK_WIND_COOKIE (frame, afr_parallel_inodelk_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->inodelk,
+ (const char *)local->cont.inodelk.volume,
+ &local->loc, local->cont.inodelk.cmd,
+ &local->cont.inodelk.flock,
+ local->xdata_req);
+ if (!--call_count)
+ break;
+ }
return 0;
}
+static int
+afr_serialized_inodelk_wind (call_frame_t *frame, xlator_t *this)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+ int i = 0;
+
+ priv = this->private;
+ local = frame->local;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND_COOKIE (frame, afr_serialized_inodelk_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->inodelk,
+ (const char *)local->cont.inodelk.volume,
+ &local->loc, local->cont.inodelk.cmd,
+ &local->cont.inodelk.flock,
+ local->xdata_req);
+ break;
+ }
+ }
+ return 0;
+}
int32_t
afr_inodelk (call_frame_t *frame, xlator_t *this,
const char *volume, loc_t *loc, int32_t cmd,
struct gf_flock *flock, dict_t *xdata)
{
- afr_private_t *priv = NULL;
afr_local_t *local = NULL;
- int i = 0;
- int32_t call_count = 0;
int32_t op_errno = ENOMEM;
- priv = this->private;
-
local = AFR_FRAME_INIT (frame, op_errno);
if (!local)
goto out;
loc_copy (&local->loc, loc);
- local->cont.inodelk.volume = volume;
+ local->cont.inodelk.volume = gf_strdup (volume);
+ if (!local->cont.inodelk.volume) {
+ op_errno = ENOMEM;
+ goto out;
+ }
+
local->cont.inodelk.cmd = cmd;
local->cont.inodelk.flock = *flock;
+ if (xdata)
+ local->xdata_req = dict_ref (xdata);
- call_count = local->call_count;
- if (!call_count) {
- op_errno = ENOMEM;
- goto out;
- }
-
- for (i = 0; i < priv->child_count; i++) {
- if (local->child_up[i]) {
- STACK_WIND_COOKIE (frame, afr_inodelk_cbk,
- (void*) (long) i,
- priv->children[i],
- priv->children[i]->fops->inodelk,
- volume, loc, cmd, flock, xdata);
-
- if (!--call_count)
- break;
- }
+ /* At least one child is up */
+ /*
+ * Non-blocking locks also need to be serialized. Otherwise there is
+ * a chance that both the mounts which issued same non-blocking inodelk
+ * may endup not acquiring the lock on any-brick.
+ * Ex: Mount1 and Mount2
+ * request for full length lock on file f1. Mount1 afr may acquire the
+ * partial lock on brick-1 and may not acquire the lock on brick-2
+ * because Mount2 already got the lock on brick-2, vice versa. Since
+ * both the mounts only got partial locks, afr treats them as failure in
+ * gaining the locks and unwinds with EAGAIN errno.
+ */
+ if (flock->l_type == F_UNLCK) {
+ afr_parallel_inodelk_wind (frame, this);
+ } else {
+ afr_serialized_inodelk_wind (frame, this);
}
return 0;
diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h
index 4044fd59d4e..4fdc5f774cc 100644
--- a/xlators/cluster/afr/src/afr.h
+++ b/xlators/cluster/afr/src/afr.h
@@ -623,7 +623,7 @@ typedef struct _afr_local {
} zerofill;
struct {
- const char *volume;
+ char *volume;
int32_t cmd;
struct gf_flock flock;
} inodelk;
generated by cgit (git 2.34.1) at 2024-11-11 20:49:38 +0000