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authorXavier Hernandez <xhernandez@datalab.es>2014-05-05 12:57:34 +0200
committerVijay Bellur <vbellur@redhat.com>2014-07-11 10:33:40 -0700
commitad112305a1c7452b13c92238b40ded80361838f3 (patch)
tree82dbf9aa0b77eb76d43c8b1ccb3ba58e61bc4e2a /xlators/cluster/ec/src/ec-data.c
parent6b4702897bd56e29db4db06f8cf896f89df1133c (diff)
cluster/ec: Added erasure code translator
Change-Id: I293917501d5c2ca4cdc6303df30cf0b568cea361 BUG: 1118629 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/7749 Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com> Reviewed-by: Jeff Darcy <jdarcy@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'xlators/cluster/ec/src/ec-data.c')
-rw-r--r--xlators/cluster/ec/src/ec-data.c261
1 files changed, 261 insertions, 0 deletions
diff --git a/xlators/cluster/ec/src/ec-data.c b/xlators/cluster/ec/src/ec-data.c
new file mode 100644
index 00000000000..0e72fbbd3b6
--- /dev/null
+++ b/xlators/cluster/ec/src/ec-data.c
@@ -0,0 +1,261 @@
+/*
+ Copyright (c) 2012 DataLab, s.l. <http://www.datalab.es>
+
+ This file is part of the cluster/ec translator for GlusterFS.
+
+ The cluster/ec translator for GlusterFS is free software: you can
+ redistribute it and/or modify it under the terms of the GNU General
+ Public License as published by the Free Software Foundation, either
+ version 3 of the License, or (at your option) any later version.
+
+ The cluster/ec translator for GlusterFS is distributed in the hope
+ that it will be useful, but WITHOUT ANY WARRANTY; without even the
+ implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with the cluster/ec translator for GlusterFS. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#include "ec-mem-types.h"
+#include "ec-helpers.h"
+#include "ec-common.h"
+#include "ec-data.h"
+
+ec_cbk_data_t * ec_cbk_data_allocate(call_frame_t * frame, xlator_t * this,
+ ec_fop_data_t * fop, int32_t id,
+ int32_t idx, int32_t op_ret,
+ int32_t op_errno)
+{
+ ec_cbk_data_t * cbk;
+ ec_t * ec = this->private;
+
+ if (fop->xl != this)
+ {
+ gf_log(this->name, GF_LOG_ERROR, "Mismatching xlators between request "
+ "and answer (req=%s, ans=%s).",
+ fop->xl->name, this->name);
+
+ return NULL;
+ }
+ if (fop->frame != frame)
+ {
+ gf_log(this->name, GF_LOG_ERROR, "Mismatching frames between request "
+ "and answer (req=%p, ans=%p).",
+ fop->frame, frame);
+
+ return NULL;
+ }
+ if (fop->id != id)
+ {
+ gf_log(this->name, GF_LOG_ERROR, "Mismatching fops between request "
+ "and answer (req=%d, ans=%d).",
+ fop->id, id);
+
+ return NULL;
+ }
+
+ cbk = mem_get0(ec->cbk_pool);
+ if (cbk == NULL)
+ {
+ gf_log(this->name, GF_LOG_ERROR, "Failed to allocate memory for an "
+ "answer.");
+ }
+
+ cbk->fop = fop;
+ cbk->idx = idx;
+ cbk->mask = 1ULL << idx;
+ cbk->count = 1;
+ cbk->op_ret = op_ret;
+ cbk->op_errno = op_errno;
+
+ LOCK(&fop->lock);
+
+ list_add_tail(&cbk->answer_list, &fop->answer_list);
+
+ UNLOCK(&fop->lock);
+
+ return cbk;
+}
+
+void ec_cbk_data_destroy(ec_cbk_data_t * cbk)
+{
+ if (cbk->xdata != NULL)
+ {
+ dict_unref(cbk->xdata);
+ }
+ if (cbk->dict != NULL)
+ {
+ dict_unref(cbk->dict);
+ }
+ if (cbk->inode != NULL)
+ {
+ inode_unref(cbk->inode);
+ }
+ if (cbk->fd != NULL)
+ {
+ fd_unref(cbk->fd);
+ }
+ if (cbk->buffers != NULL)
+ {
+ iobref_unref(cbk->buffers);
+ }
+ GF_FREE(cbk->vector);
+
+ mem_put(cbk);
+}
+
+ec_fop_data_t * ec_fop_data_allocate(call_frame_t * frame, xlator_t * this,
+ int32_t id, uint32_t flags,
+ uintptr_t target, int32_t minimum,
+ ec_wind_f wind, ec_handler_f handler,
+ ec_cbk_t cbks, void * data)
+{
+ ec_fop_data_t * fop, * parent;
+ ec_t * ec = this->private;
+
+ fop = mem_get0(ec->fop_pool);
+ if (fop == NULL)
+ {
+ gf_log(this->name, GF_LOG_ERROR, "Failed to allocate memory for a "
+ "request.");
+
+ return NULL;
+ }
+
+ fop->xl = this;
+ fop->req_frame = frame;
+
+ /* fops need a private frame to be able to execute some postop operations
+ * even if the original fop has completed and reported back to the upper
+ * xlator and it has destroyed the base frame.
+ *
+ * TODO: minimize usage of private frames. Reuse req_frame as much as
+ * possible.
+ */
+ if (frame != NULL)
+ {
+ fop->frame = copy_frame(frame);
+ }
+ else
+ {
+ fop->frame = create_frame(this, this->ctx->pool);
+ }
+ if (fop->frame == NULL)
+ {
+ gf_log(this->name, GF_LOG_ERROR, "Failed to create a private frame "
+ "for a request");
+
+ mem_put(fop);
+
+ return NULL;
+ }
+ fop->id = id;
+ fop->refs = 1;
+
+ fop->flags = flags;
+ fop->minimum = minimum;
+ fop->mask = target;
+
+ INIT_LIST_HEAD(&fop->lock_list);
+ INIT_LIST_HEAD(&fop->cbk_list);
+ INIT_LIST_HEAD(&fop->answer_list);
+
+ fop->wind = wind;
+ fop->handler = handler;
+ fop->cbks = cbks;
+ fop->data = data;
+
+ LOCK_INIT(&fop->lock);
+
+ fop->frame->local = fop;
+
+ if (frame != NULL)
+ {
+ parent = frame->local;
+ if (parent != NULL)
+ {
+ LOCK(&parent->lock);
+
+ parent->jobs++;
+ parent->refs++;
+
+ UNLOCK(&parent->lock);
+ }
+
+ fop->parent = parent;
+ }
+
+ return fop;
+}
+
+void ec_fop_data_acquire(ec_fop_data_t * fop)
+{
+ LOCK(&fop->lock);
+
+ ec_trace("ACQUIRE", fop, "");
+
+ fop->refs++;
+
+ UNLOCK(&fop->lock);
+}
+
+void ec_fop_data_release(ec_fop_data_t * fop)
+{
+ ec_cbk_data_t * cbk, * tmp;
+ int32_t refs;
+
+ LOCK(&fop->lock);
+
+ ec_trace("RELEASE", fop, "");
+
+ refs = --fop->refs;
+
+ UNLOCK(&fop->lock);
+
+ if (refs == 0)
+ {
+ fop->frame->local = NULL;
+ STACK_DESTROY(fop->frame->root);
+
+ LOCK_DESTROY(&fop->lock);
+
+ if (fop->xdata != NULL)
+ {
+ dict_unref(fop->xdata);
+ }
+ if (fop->dict != NULL)
+ {
+ dict_unref(fop->dict);
+ }
+ if (fop->inode != NULL)
+ {
+ inode_unref(fop->inode);
+ }
+ if (fop->fd != NULL)
+ {
+ fd_unref(fop->fd);
+ }
+ if (fop->buffers != NULL)
+ {
+ iobref_unref(fop->buffers);
+ }
+ GF_FREE(fop->vector);
+ GF_FREE(fop->str[0]);
+ GF_FREE(fop->str[1]);
+ loc_wipe(&fop->loc[0]);
+ loc_wipe(&fop->loc[1]);
+
+ ec_resume_parent(fop, fop->error);
+
+ list_for_each_entry_safe(cbk, tmp, &fop->answer_list, answer_list)
+ {
+ list_del_init(&cbk->answer_list);
+
+ ec_cbk_data_destroy(cbk);
+ }
+
+ mem_put(fop);
+ }
+}