summaryrefslogtreecommitdiffstats
path: root/xlators/mgmt/glusterd/src/glusterd-store.c
diff options
context:
space:
mode:
Diffstat (limited to 'xlators/mgmt/glusterd/src/glusterd-store.c')
-rw-r--r--xlators/mgmt/glusterd/src/glusterd-store.c417
1 files changed, 367 insertions, 50 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-store.c b/xlators/mgmt/glusterd/src/glusterd-store.c
index 1e39fb2..d9d2a3e 100644
--- a/xlators/mgmt/glusterd/src/glusterd-store.c
+++ b/xlators/mgmt/glusterd/src/glusterd-store.c
@@ -44,6 +44,7 @@
#include <sys/resource.h>
#include <inttypes.h>
#include <dirent.h>
+#include <mntent.h>
void
glusterd_replace_slash_with_hyphen (char *str)
@@ -2424,7 +2425,7 @@ glusterd_store_update_volinfo (glusterd_volinfo_t *volinfo)
strlen (GLUSTERD_STORE_KEY_VOL_RESTORED_SNAP))) {
ret = uuid_parse (value, volinfo->restored_from_snap);
if (ret)
- gf_log ("", GF_LOG_WARNING,
+ gf_log (this->name, GF_LOG_WARNING,
"failed to parse restored snap's uuid");
} else if (!strncmp (key, GLUSTERD_STORE_KEY_PARENT_VOLNAME,
strlen (GLUSTERD_STORE_KEY_PARENT_VOLNAME))) {
@@ -2792,6 +2793,209 @@ out:
return ret;
}
+/* Figure out the brick mount path, from the brick path */
+int32_t
+glusterd_find_brick_mount_path (char *brick_path, int32_t brick_count,
+ char **brick_mount_path)
+{
+ char brick_num[PATH_MAX] = "";
+ char *ptr = NULL;
+ int32_t ret = -1;
+ xlator_t *this = NULL;
+
+ this = THIS;
+ GF_ASSERT (this);
+ GF_ASSERT (brick_path);
+ GF_ASSERT (brick_mount_path);
+
+ *brick_mount_path = gf_strdup (brick_path);
+ if (!*brick_mount_path) {
+ ret = -1;
+ goto out;
+ }
+
+ snprintf (brick_num, sizeof(brick_num), "brick%d", brick_count);
+
+ /* Finding the pointer to the end of
+ * /var/run/gluster/snaps/<snap-uuid>
+ */
+ ptr = strstr (*brick_mount_path, brick_num);
+ if (!ptr) {
+ /* Snapshot bricks must have brick num as part
+ * of the brickpath
+ */
+ gf_log (this->name, GF_LOG_ERROR,
+ "Invalid brick path(%s)", brick_path);
+ ret = -1;
+ goto out;
+ }
+
+ /* Moving the pointer to the end of
+ * /var/run/gluster/snaps/<snap-uuid>/<brick_num>
+ * and assigning '\0' to it.
+ */
+ ptr += strlen(brick_num);
+ *ptr = '\0';
+
+ ret = 0;
+out:
+ if (ret && *brick_mount_path) {
+ GF_FREE (*brick_mount_path);
+ *brick_mount_path = NULL;
+ }
+ gf_log (this->name, GF_LOG_TRACE, "Returning with %d", ret);
+ return ret;
+}
+
+/* Check if brick_mount_path is already mounted. If not, mount the device_path
+ * at the brick_mount_path
+ */
+int32_t
+glusterd_mount_brick_paths (char *brick_mount_path, char *device_path)
+{
+ FILE *mtab = NULL;
+ int32_t ret = -1;
+ runner_t runner = {0, };
+ struct mntent *entry = NULL;
+ xlator_t *this = NULL;
+ glusterd_conf_t *priv = NULL;
+
+ this = THIS;
+ GF_ASSERT (this);
+ GF_ASSERT (brick_mount_path);
+ GF_ASSERT (device_path);
+
+ priv = this->private;
+ GF_ASSERT (priv);
+
+ /* Check if the brick_mount_path is already mounted */
+ entry = glusterd_get_mnt_entry_info (brick_mount_path, mtab);
+ if (entry) {
+ gf_log (this->name, GF_LOG_INFO,
+ "brick_mount_path (%s) already mounted.",
+ brick_mount_path);
+ ret = 0;
+ goto out;
+ }
+
+ /* TODO RHEL 6.5 has the logical volumes inactive by default
+ * on reboot. Hence activating the logical vol. Check behaviour
+ * on other systems
+ */
+ /* Activate the snapshot */
+ runinit (&runner);
+ runner_add_args (&runner, "lvchange", "-ay", device_path,
+ NULL);
+ ret = runner_run (&runner);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to activate %s. Error: %s",
+ device_path, strerror(errno));
+ goto out;
+ } else
+ gf_log (this->name, GF_LOG_DEBUG,
+ "Activating %s successful", device_path);
+
+ /* Mount the snapshot */
+ ret = glusterd_mount_lvm_snapshot (device_path, brick_mount_path);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to mount lvm snapshot.");
+ goto out;
+ }
+
+out:
+ if (mtab)
+ endmntent (mtab);
+ gf_log (this->name, GF_LOG_TRACE, "Returning with %d", ret);
+ return ret;
+}
+
+static int32_t
+glusterd_store_recreate_brick_mounts (glusterd_volinfo_t *volinfo)
+{
+ char *brick_mount_path = NULL;
+ glusterd_brickinfo_t *brickinfo = NULL;
+ int32_t ret = -1;
+ int32_t brick_count = -1;
+ struct stat st_buf = {0, };
+ xlator_t *this = NULL;
+
+ this = THIS;
+ GF_ASSERT (this);
+ GF_ASSERT (volinfo);
+
+ brick_count = 0;
+ list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
+ brick_count++;
+ /* If the brick is not of this node, or its
+ * snapshot is pending, or the brick is not
+ * a snapshotted brick, we continue
+ */
+ if ((uuid_compare (brickinfo->uuid, MY_UUID)) ||
+ (brickinfo->snap_status == -1) ||
+ (strlen(brickinfo->device_path) == 0))
+ continue;
+
+ /* Fetch the brick mount path from the brickinfo->path */
+ ret = glusterd_find_brick_mount_path (brickinfo->path,
+ brick_count,
+ &brick_mount_path);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to find brick_mount_path for %s",
+ brickinfo->path);
+ goto out;
+ }
+
+ /* Check if the brickinfo path is present.
+ * If not create the brick_mount_path */
+ ret = lstat (brickinfo->path, &st_buf);
+ if (ret) {
+ if (errno == ENOENT) {
+ ret = mkdir_p (brick_mount_path, 0777,
+ _gf_true);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to create %s. "
+ "Error: %s", brick_mount_path,
+ strerror (errno));
+ goto out;
+ }
+ } else {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Brick Path(%s) not valid. "
+ "Error: %s", brickinfo->path,
+ strerror(errno));
+ goto out;
+ }
+ }
+
+ /* Check if brick_mount_path is already mounted.
+ * If not, mount the device_path at the brick_mount_path */
+ ret = glusterd_mount_brick_paths (brick_mount_path,
+ brickinfo->device_path);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to mount brick_mount_path");
+ goto out;
+ }
+
+ if (brick_mount_path) {
+ GF_FREE (brick_mount_path);
+ brick_mount_path = NULL;
+ }
+ }
+
+ ret = 0;
+out:
+ if (ret && brick_mount_path)
+ GF_FREE (brick_mount_path);
+
+ gf_log (this->name, GF_LOG_TRACE, "Returning with %d", ret);
+ return ret;
+}
+
int32_t
glusterd_resolve_snap_bricks (xlator_t *this, glusterd_snap_t *snap)
{
@@ -2911,25 +3115,16 @@ out:
int32_t
glusterd_store_retrieve_snap (char *snapname)
{
- int32_t ret = -1;
- dict_t *dict = NULL;
- glusterd_snap_t *snap = NULL;
- glusterd_conf_t *priv = NULL;
- xlator_t *this = NULL;
+ int32_t ret = -1;
+ glusterd_snap_t *snap = NULL;
+ glusterd_conf_t *priv = NULL;
+ xlator_t *this = NULL;
this = THIS;
priv = this->private;
GF_ASSERT (priv);
GF_ASSERT (snapname);
- dict = dict_new();
- if (!dict) {
- gf_log (this->name, GF_LOG_ERROR,
- "Failed to create dict");
- ret = -1;
- goto out;
- }
-
snap = glusterd_new_snap_object ();
if (!snap) {
gf_log (this->name, GF_LOG_ERROR, "Failed to create "
@@ -2952,34 +3147,6 @@ glusterd_store_retrieve_snap (char *snapname)
goto out;
}
- /* Unlike bricks of normal volumes which are resolved at the end of
- the glusterd restore, the bricks belonging to the snap volumes of
- each snap should be resolved as part of snapshot restore itself.
- Because if the snapshot has to be removed, then resolving bricks
- helps glusterd in understanding what all bricks have its own uuid
- and killing those bricks.
- */
- ret = glusterd_resolve_snap_bricks (this, snap);
- if (ret)
- gf_log (this->name, GF_LOG_WARNING, "resolving the snap bricks"
- " failed (snap: %s)", snap?snap->snapname:"");
-
- /* When the snapshot command from cli is received, the on disk and
- in memory structures for the snapshot are created (with the status)
- being marked as GD_SNAP_STATUS_INIT. Once the backend snapshot is
- taken, the status is changed to GD_SNAP_STATUS_IN_USE. If glusterd
- dies after taking the backend snapshot, but before updating the
- status, then when glusterd comes up, it should treat that snapshot
- as a failed snapshot and clean it up.
- */
- if (snap->snap_status != GD_SNAP_STATUS_IN_USE) {
- ret = glusterd_snap_remove (dict, snap, _gf_true, _gf_true);
- if (ret)
- gf_log (this->name, GF_LOG_WARNING, "failed to remove"
- " the snapshot %s", snap->snapname);
- goto out;
- }
-
/* TODO: list_add_order can do 'N-square' comparisions and
is not efficient. Find a better solution to store the snap
in order */
@@ -2987,9 +3154,6 @@ glusterd_store_retrieve_snap (char *snapname)
glusterd_compare_snap_time);
out:
- if (dict)
- dict_unref (dict);
-
gf_log (this->name, GF_LOG_TRACE, "Returning with %d", ret);
return ret;
}
@@ -3616,19 +3780,147 @@ out:
return ret;
}
+static int32_t
+glusterd_recreate_vol_brick_mounts (xlator_t *this,
+ glusterd_volinfo_t *volinfo)
+{
+ int32_t ret = 0;
+ glusterd_conf_t *priv = NULL;
+ glusterd_brickinfo_t *brickinfo = NULL;
+
+ GF_ASSERT (this);
+ priv = this->private;
+ GF_ASSERT (priv);
+
+ list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
+ ret = glusterd_store_recreate_brick_mounts (volinfo);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to recreate brick mounts "
+ "for %s", volinfo->volname);
+ goto out;
+ }
+ }
+
+out:
+ gf_log (this->name, GF_LOG_TRACE, "Returning with %d", ret);
+ return ret;
+}
+
+/* Bricks for snap volumes are hosted at /var/run/gluster/snaps
+ * When a volume is restored, it points to the bricks of the snap
+ * volume it was restored from. Hence on a node restart these
+ * paths need to be recreated and re-mounted
+ */
+int32_t
+glusterd_recreate_all_snap_brick_mounts (xlator_t *this)
+{
+ int32_t ret = 0;
+ glusterd_conf_t *priv = NULL;
+ glusterd_volinfo_t *volinfo = NULL;
+ glusterd_snap_t *snap = NULL;
+
+ GF_ASSERT (this);
+ priv = this->private;
+ GF_ASSERT (priv);
+
+ /* Recreate bricks of volumes restored from snaps */
+ list_for_each_entry (volinfo, &priv->volumes, vol_list) {
+ /* If the volume is not a restored volume then continue */
+ if (uuid_is_null (volinfo->restored_from_snap))
+ continue;
+
+ ret = glusterd_recreate_vol_brick_mounts (this, volinfo);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to recreate brick mounts "
+ "for %s", volinfo->volname);
+ goto out;
+ }
+ }
+
+ /* Recreate bricks of snapshot volumes */
+ list_for_each_entry (snap, &priv->snapshots, snap_list) {
+ list_for_each_entry (volinfo, &snap->volumes, vol_list) {
+ ret = glusterd_recreate_vol_brick_mounts (this,
+ volinfo);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to recreate brick mounts "
+ "for %s", snap->snapname);
+ goto out;
+ }
+ }
+ }
+
+out:
+ gf_log (this->name, GF_LOG_TRACE, "Returning with %d", ret);
+ return ret;
+}
+
+/* When the snapshot command from cli is received, the on disk and
+ * in memory structures for the snapshot are created (with the status)
+ * being marked as GD_SNAP_STATUS_INIT. Once the backend snapshot is
+ * taken, the status is changed to GD_SNAP_STATUS_IN_USE. If glusterd
+ * dies after taking the backend snapshot, but before updating the
+ * status, then when glusterd comes up, it should treat that snapshot
+ * as a failed snapshot and clean it up.
+ */
+int32_t
+glusterd_snap_cleanup (xlator_t *this)
+{
+ dict_t *dict = NULL;
+ int32_t ret = 0;
+ glusterd_conf_t *priv = NULL;
+ glusterd_snap_t *snap = NULL;
+
+ GF_ASSERT (this);
+ priv = this->private;
+ GF_ASSERT (priv);
+
+ dict = dict_new();
+ if (!dict) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to create dict");
+ ret = -1;
+ goto out;
+ }
+
+ list_for_each_entry (snap, &priv->snapshots, snap_list) {
+ if (snap->snap_status != GD_SNAP_STATUS_IN_USE) {
+ ret = glusterd_snap_remove (dict, snap,
+ _gf_true, _gf_true);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Failed to remove the snapshot %s",
+ snap->snapname);
+ goto out;
+ }
+ }
+ }
+out:
+ if (dict)
+ dict_unref (dict);
+
+ gf_log (this->name, GF_LOG_TRACE, "Returning with %d", ret);
+ return ret;
+}
+
int32_t
glusterd_resolve_all_bricks (xlator_t *this)
{
- int32_t ret = 0;
- glusterd_conf_t *priv = NULL;
- glusterd_volinfo_t *volinfo = NULL;
+ int32_t ret = 0;
+ glusterd_conf_t *priv = NULL;
+ glusterd_volinfo_t *volinfo = NULL;
glusterd_brickinfo_t *brickinfo = NULL;
+ glusterd_snap_t *snap = NULL;
GF_ASSERT (this);
priv = this->private;
GF_ASSERT (priv);
+ /* Resolve bricks of volumes */
list_for_each_entry (volinfo, &priv->volumes, vol_list) {
list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
ret = glusterd_resolve_brick (brickinfo);
@@ -3640,9 +3932,20 @@ glusterd_resolve_all_bricks (xlator_t *this)
}
}
-out:
- gf_log ("", GF_LOG_DEBUG, "Returning with %d", ret);
+ /* Resolve bricks of snapshot volumes */
+ list_for_each_entry (snap, &priv->snapshots, snap_list) {
+ ret = glusterd_resolve_snap_bricks (this, snap);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "resolving the snap bricks"
+ " failed for snap: %s",
+ snap->snapname);
+ goto out;
+ }
+ }
+out:
+ gf_log (this->name, GF_LOG_TRACE, "Returning with %d", ret);
return ret;
}
@@ -3677,6 +3980,20 @@ glusterd_restore ()
if (ret)
goto out;
+ ret = glusterd_snap_cleanup (this);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR, "Failed to perform "
+ "a cleanup of the snapshots");
+ goto out;
+ }
+
+ ret = glusterd_recreate_all_snap_brick_mounts (this);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR, "Failed to recreate "
+ "all snap brick mounts");
+ goto out;
+ }
+
out:
gf_log ("", GF_LOG_DEBUG, "Returning %d", ret);
return ret;