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authorVikas Gorur <vikas@gluster.com>2009-11-24 08:45:07 +0000
committerAnand V. Avati <avati@dev.gluster.com>2009-11-24 06:40:00 -0800
commit9e3fddb13769288ddc13db3125b8bedf26058cdf (patch)
tree2da64c5ca49ed14b22c253d67eed800533bf1e94 /xlators/cluster/afr
parent21cffbc219efc36229002e71a02b9270cfee9186 (diff)
cluster/afr: Refactored the data self-heal algorithm.
Refactored the operation of the data self-heal algorithm as: * open all fd's (if fd not supplied by caller) * lock 0-0 (if lock not supplied by caller) * fxattrop, fstat (instead of lookup) ... self heal ... * unlock (if lock not supplied by caller) * close (if fd not supplied by caller). Signed-off-by: Vikas Gorur <vikas@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 170 (Auto-heal fails on files that are open()-ed/mmap()-ed) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=170
Diffstat (limited to 'xlators/cluster/afr')
-rw-r--r--xlators/cluster/afr/src/afr-self-heal-data.c385
-rw-r--r--xlators/cluster/afr/src/afr.h6
2 files changed, 248 insertions, 143 deletions
diff --git a/xlators/cluster/afr/src/afr-self-heal-data.c b/xlators/cluster/afr/src/afr-self-heal-data.c
index bafb92fd218..46d0748318c 100644
--- a/xlators/cluster/afr/src/afr-self-heal-data.c
+++ b/xlators/cluster/afr/src/afr-self-heal-data.c
@@ -66,7 +66,9 @@ afr_sh_data_done (call_frame_t *frame, xlator_t *this)
TODO: cleanup sh->*
*/
- if (sh->healing_fd) {
+ if (sh->healing_fd && !sh->healing_fd_opened) {
+ /* unref only if we created the fd ourselves */
+
fd_unref (sh->healing_fd);
sh->healing_fd = NULL;
}
@@ -158,6 +160,13 @@ afr_sh_data_close (call_frame_t *frame, xlator_t *this)
stbuf.st_mtime = sh->buf[source].st_mtime;
#endif
+ if (sh->healing_fd_opened) {
+ /* not our job to close the fd */
+
+ afr_sh_data_done (frame, this);
+ return 0;
+ }
+
if (!sh->healing_fd) {
afr_sh_data_done (frame, this);
return 0;
@@ -268,6 +277,13 @@ afr_sh_data_unlock (call_frame_t *frame, xlator_t *this)
sh = &local->self_heal;
priv = this->private;
+ if (sh->data_lock_held) {
+ /* not our job to unlock, proceed to close */
+
+ afr_sh_data_close (frame, this);
+ return 0;
+ }
+
for (i = 0; i < priv->child_count; i++) {
if (sh->locked_nodes[i])
call_count++;
@@ -393,8 +409,8 @@ afr_sh_data_erase_pending (call_frame_t *frame, xlator_t *this)
STACK_WIND_COOKIE (frame, afr_sh_data_erase_pending_cbk,
(void *) (long) i,
priv->children[i],
- priv->children[i]->fops->xattrop,
- &local->loc,
+ priv->children[i]->fops->fxattrop,
+ sh->healing_fd,
GF_XATTROP_ADD_ARRAY, erase_xattr[i]);
if (!--call_count)
break;
@@ -571,131 +587,6 @@ afr_sh_data_pick_algo (call_frame_t *frame, xlator_t *this)
int
-afr_sh_data_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
- int32_t op_ret, int32_t op_errno, fd_t *fd)
-{
- afr_local_t *local = NULL;
- afr_self_heal_t *sh = NULL;
- afr_private_t *priv = NULL;
- int call_count = 0;
- int child_index = 0;
-
- struct afr_sh_algorithm *sh_algo = NULL;
-
- local = frame->local;
- sh = &local->self_heal;
- priv = this->private;
-
- child_index = (long) cookie;
-
- /* TODO: some of the open's might fail.
- In that case, modify cleanup fn to send flush on those
- fd's which are already open */
-
- LOCK (&frame->lock);
- {
- if (op_ret == -1) {
- gf_log (this->name, GF_LOG_TRACE,
- "open of %s failed on child %s (%s)",
- local->loc.path,
- priv->children[child_index]->name,
- strerror (op_errno));
- sh->op_failed = 1;
- }
-
- }
- UNLOCK (&frame->lock);
-
- call_count = afr_frame_return (frame);
-
- if (call_count == 0) {
- if (sh->op_failed) {
- afr_sh_data_finish (frame, this);
- return 0;
- }
- gf_log (this->name, GF_LOG_TRACE,
- "fd for %s opened, commencing sync",
- local->loc.path);
-
- gf_log (this->name, GF_LOG_TRACE,
- "sourcing file %s from %s to other sinks",
- local->loc.path, priv->children[sh->source]->name);
-
- sh->algo_completion_cbk = afr_sh_data_trim_sinks;
- sh->algo_abort_cbk = afr_sh_data_finish;
-
- sh_algo = afr_sh_data_pick_algo (frame, this);
-
- sh_algo->fn (frame, this);
- }
-
- return 0;
-}
-
-
-int
-afr_sh_data_open (call_frame_t *frame, xlator_t *this)
-{
- int i = 0;
- int call_count = 0;
-
- int source = -1;
- int *sources = NULL;
-
- fd_t *fd = NULL;
-
- afr_local_t * local = NULL;
- afr_private_t * priv = NULL;
- afr_self_heal_t *sh = NULL;
-
- local = frame->local;
- sh = &local->self_heal;
- priv = this->private;
-
- call_count = sh->active_sinks + 1;
- local->call_count = call_count;
-
- fd = fd_create (local->loc.inode, frame->root->pid);
- sh->healing_fd = fd;
-
- source = local->self_heal.source;
- sources = local->self_heal.sources;
-
- sh->block_size = 65536;
- sh->file_size = sh->buf[source].st_size;
-
- if (FILE_HAS_HOLES (&sh->buf[source]))
- sh->file_has_holes = 1;
-
- /* open source */
- STACK_WIND_COOKIE (frame, afr_sh_data_open_cbk,
- (void *) (long) source,
- priv->children[source],
- priv->children[source]->fops->open,
- &local->loc, O_RDWR|O_LARGEFILE, fd, 0);
- call_count--;
-
- /* open sinks */
- for (i = 0; i < priv->child_count; i++) {
- if(sources[i] || !local->child_up[i])
- continue;
-
- STACK_WIND_COOKIE (frame, afr_sh_data_open_cbk,
- (void *) (long) i,
- priv->children[i],
- priv->children[i]->fops->open,
- &local->loc,
- O_RDWR|O_LARGEFILE, fd, 0);
-
- if (!--call_count)
- break;
- }
-
- return 0;
-}
-
-
-int
afr_sh_data_sync_prepare (call_frame_t *frame, xlator_t *this)
{
afr_local_t *local = NULL;
@@ -705,6 +596,8 @@ afr_sh_data_sync_prepare (call_frame_t *frame, xlator_t *this)
int source = 0;
int i = 0;
+ struct afr_sh_algorithm *sh_algo = NULL;
+
local = frame->local;
sh = &local->self_heal;
priv = this->private;
@@ -732,7 +625,12 @@ afr_sh_data_sync_prepare (call_frame_t *frame, xlator_t *this)
"self-healing file %s from subvolume %s to %d other",
local->loc.path, priv->children[source]->name, active_sinks);
- afr_sh_data_open (frame, this);
+ sh->algo_completion_cbk = afr_sh_data_trim_sinks;
+ sh->algo_abort_cbk = afr_sh_data_finish;
+
+ sh_algo = afr_sh_data_pick_algo (frame, this);
+
+ sh_algo->fn (frame, this);
return 0;
}
@@ -809,7 +707,13 @@ afr_sh_data_fix (call_frame_t *frame, xlator_t *this)
return 0;
}
- sh->source = source;
+ sh->source = source;
+ sh->block_size = 65536;
+ sh->file_size = sh->buf[source].st_size;
+
+ if (FILE_HAS_HOLES (&sh->buf[source]))
+ sh->file_has_holes = 1;
+
local->cont.lookup.buf.st_size = sh->buf[source].st_size;
/* detect changes not visible through pending flags -- JIC */
@@ -834,10 +738,9 @@ afr_sh_data_fix (call_frame_t *frame, xlator_t *this)
int
-afr_sh_data_lookup_cbk (call_frame_t *frame, void *cookie,
- xlator_t *this, int32_t op_ret, int32_t op_errno,
- inode_t *inode, struct stat *buf, dict_t *xattr,
- struct stat *postparent)
+afr_sh_data_fstat_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno,
+ struct stat *buf)
{
afr_private_t *priv = NULL;
afr_local_t *local = NULL;
@@ -853,7 +756,11 @@ afr_sh_data_lookup_cbk (call_frame_t *frame, void *cookie,
LOCK (&frame->lock);
{
if (op_ret != -1) {
- sh->xattr[child_index] = dict_ref (xattr);
+ gf_log (this->name, GF_LOG_TRACE,
+ "fstat of %s on %s succeeded",
+ local->loc.path,
+ priv->children[child_index]->name);
+
sh->buf[child_index] = *buf;
}
}
@@ -870,13 +777,89 @@ afr_sh_data_lookup_cbk (call_frame_t *frame, void *cookie,
int
-afr_sh_data_lookup (call_frame_t *frame, xlator_t *this)
+afr_sh_data_fstat (call_frame_t *frame, xlator_t *this)
+{
+ afr_self_heal_t *sh = NULL;
+ afr_local_t *local = NULL;
+ afr_private_t *priv = NULL;
+
+ int call_count = 0;
+ int i = 0;
+
+ priv = this->private;
+ local = frame->local;
+ sh = &local->self_heal;
+
+ call_count = local->child_count;
+
+ local->call_count = call_count;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND_COOKIE (frame, afr_sh_data_fstat_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->fstat,
+ sh->healing_fd);
+
+ if (!--call_count)
+ break;
+ }
+ }
+
+ return 0;
+}
+
+
+int
+afr_sh_data_fxattrop_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno,
+ dict_t *xattr)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+
+ int call_count = -1;
+ int child_index = (long) cookie;
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret != -1) {
+ gf_log (this->name, GF_LOG_TRACE,
+ "fxattrop of %s on %s succeeded",
+ local->loc.path,
+ priv->children[child_index]->name);
+
+ sh->xattr[child_index] = dict_ref (xattr);
+ }
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0) {
+ afr_sh_data_fstat (frame, this);
+ }
+
+ return 0;
+}
+
+
+int
+afr_sh_data_fxattrop (call_frame_t *frame, xlator_t *this)
{
afr_self_heal_t *sh = NULL;
afr_local_t *local = NULL;
afr_private_t *priv = NULL;
dict_t *xattr_req = NULL;
+ int32_t zero_pending[3] = {0, 0, 0};
+
int call_count = 0;
int i = 0;
int ret = 0;
@@ -892,18 +875,20 @@ afr_sh_data_lookup (call_frame_t *frame, xlator_t *this)
xattr_req = dict_new();
if (xattr_req) {
for (i = 0; i < priv->child_count; i++) {
- ret = dict_set_uint64 (xattr_req, priv->pending_key[i],
- 3 * sizeof(int32_t));
+ ret = dict_set_static_bin (xattr_req, priv->pending_key[i],
+ zero_pending, 3 * sizeof(int32_t));
}
}
for (i = 0; i < priv->child_count; i++) {
if (local->child_up[i]) {
- STACK_WIND_COOKIE (frame, afr_sh_data_lookup_cbk,
+ STACK_WIND_COOKIE (frame, afr_sh_data_fxattrop_cbk,
(void *) (long) i,
priv->children[i],
- priv->children[i]->fops->lookup,
- &local->loc, xattr_req);
+ priv->children[i]->fops->fxattrop,
+ sh->healing_fd, GF_XATTROP_ADD_ARRAY,
+ xattr_req);
+
if (!--call_count)
break;
}
@@ -993,7 +978,7 @@ afr_sh_data_lock_rec (call_frame_t *frame, xlator_t *this, int child_index)
if ((child_index == priv->child_count)
|| (sh->lock_count == afr_lock_server_count (priv, AFR_DATA_TRANSACTION))) {
- afr_sh_data_lookup (frame, this);
+ afr_sh_data_fxattrop (frame, this);
return 0;
}
@@ -1025,6 +1010,14 @@ afr_sh_data_lock (call_frame_t *frame, xlator_t *this)
sh = &local->self_heal;
priv = this->private;
+ if (sh->data_lock_held) {
+ /* caller has held the lock already,
+ so skip locking */
+
+ afr_sh_data_fxattrop (frame, this);
+ return 0;
+ }
+
for (i = 0; i < priv->child_count; i++)
sh->locked_nodes[i] = 0;
@@ -1033,6 +1026,112 @@ afr_sh_data_lock (call_frame_t *frame, xlator_t *this)
int
+afr_sh_data_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, fd_t *fd)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int call_count = 0;
+ int child_index = 0;
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ child_index = (long) cookie;
+
+ /* TODO: some of the open's might fail.
+ In that case, modify cleanup fn to send flush on those
+ fd's which are already open */
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ gf_log (this->name, GF_LOG_TRACE,
+ "open of %s failed on child %s (%s)",
+ local->loc.path,
+ priv->children[child_index]->name,
+ strerror (op_errno));
+ sh->op_failed = 1;
+ }
+
+ gf_log (this->name, GF_LOG_TRACE,
+ "open of %s succeeded on child %s",
+ local->loc.path,
+ priv->children[child_index]->name);
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0) {
+ if (sh->op_failed) {
+ afr_sh_data_finish (frame, this);
+ return 0;
+ }
+
+ gf_log (this->name, GF_LOG_TRACE,
+ "fd for %s opened, commencing sync",
+ local->loc.path);
+
+ afr_sh_data_lock (frame, this);
+ }
+
+ return 0;
+}
+
+
+int
+afr_sh_data_open (call_frame_t *frame, xlator_t *this)
+{
+ int i = 0;
+ int call_count = 0;
+
+ fd_t *fd = NULL;
+
+ afr_local_t * local = NULL;
+ afr_private_t * priv = NULL;
+ afr_self_heal_t *sh = NULL;
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ if (sh->healing_fd_opened) {
+ /* caller has opened the fd for us already, so skip open */
+
+ afr_sh_data_lock (frame, this);
+ return 0;
+ }
+
+ call_count = afr_up_children_count (priv->child_count, local->child_up);
+ local->call_count = call_count;
+
+ fd = fd_create (local->loc.inode, frame->root->pid);
+ sh->healing_fd = fd;
+
+ /* open sinks */
+ for (i = 0; i < priv->child_count; i++) {
+ if(!local->child_up[i])
+ continue;
+
+ STACK_WIND_COOKIE (frame, afr_sh_data_open_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->open,
+ &local->loc,
+ O_RDWR|O_LARGEFILE, fd, 0);
+
+ if (!--call_count)
+ break;
+ }
+
+ return 0;
+}
+
+
+int
afr_self_heal_data (call_frame_t *frame, xlator_t *this)
{
afr_local_t *local = NULL;
@@ -1044,7 +1143,7 @@ afr_self_heal_data (call_frame_t *frame, xlator_t *this)
sh = &local->self_heal;
if (local->need_data_self_heal && priv->data_self_heal) {
- afr_sh_data_lock (frame, this);
+ afr_sh_data_open (frame, this);
} else {
gf_log (this->name, GF_LOG_TRACE,
"not doing data self heal on %s",
diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h
index 2f57426621d..412f38afc79 100644
--- a/xlators/cluster/afr/src/afr.h
+++ b/xlators/cluster/afr/src/afr.h
@@ -118,6 +118,12 @@ typedef struct {
/* private data for the particular self-heal algorithm */
void *private;
+ gf_boolean_t healing_fd_opened; /* set by caller: true if caller
+ has already opened fd */
+
+ gf_boolean_t data_lock_held; /* set by caller: true if caller
+ has already acquired 0-0 lock */
+
int (*completion_cbk) (call_frame_t *frame, xlator_t *this);
int (*algo_completion_cbk) (call_frame_t *frame, xlator_t *this);
int (*algo_abort_cbk) (call_frame_t *frame, xlator_t *this);