diff options
| author | Avra Sengupta <asengupt@redhat.com> | 2014-02-19 16:30:11 +0530 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2014-04-11 16:29:17 -0700 |
| commit | 29bccc2ed18eedc40e83d2f0d35327037a322384 (patch) | |
| tree | 207829c5a0535af28cbad6de90497d2f48093d1a /xlators/mgmt/glusterd/src/glusterd-snapshot.c | |
| parent | 2045c9ea1c7c3aac9d377070df6f0ee99619f421 (diff) | |
gluster: GlusterFS Volume Snapshot Feature
This is the initial patch for the Snapshot feature. Current patch
includes following features:
* Snapshot create
* Snapshot delete
* Snapshot restore
* Snapshot list
* Snapshot info
* Snapshot status
* Snapshot config
Change-Id: I2f46920c0d61c515f6a60e0f8b46fff886d9f6a9
BUG: 1061685
Signed-off-by: shishir gowda <sgowda@redhat.com>
Signed-off-by: Sachin Pandit <spandit@redhat.com>
Signed-off-by: Vijaikumar M <vmallika@redhat.com>
Signed-off-by: Raghavendra Bhat <raghavendra@redhat.com>
Signed-off-by: Rajesh Joseph <rjoseph@redhat.com>
Signed-off-by: Joseph Fernandes <josferna@redhat.com>
Signed-off-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-on: http://review.gluster.org/7128
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'xlators/mgmt/glusterd/src/glusterd-snapshot.c')
| -rw-r--r-- | xlators/mgmt/glusterd/src/glusterd-snapshot.c | 5595 |
1 files changed, 5595 insertions, 0 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-snapshot.c b/xlators/mgmt/glusterd/src/glusterd-snapshot.c new file mode 100644 index 00000000000..e19ee78ec0f --- /dev/null +++ b/xlators/mgmt/glusterd/src/glusterd-snapshot.c @@ -0,0 +1,5595 @@ +/* + Copyright (c) 2013-2014 Red Hat, Inc. <http://www.redhat.com> + This file is part of GlusterFS. + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include <inttypes.h> +#include <sys/types.h> +#include <unistd.h> +#include <sys/resource.h> +#include <sys/statvfs.h> +#include <sys/mount.h> + +#include "globals.h" +#include "compat.h" +#include "protocol-common.h" +#include "xlator.h" +#include "logging.h" +#include "timer.h" +#include "glusterd-mem-types.h" +#include "glusterd.h" +#include "glusterd-sm.h" +#include "glusterd-op-sm.h" +#include "glusterd-utils.h" +#include "glusterd-store.h" +#include "run.h" +#include "glusterd-volgen.h" +#include "glusterd-mgmt.h" +#include "glusterd-syncop.h" + +#include "syscall.h" +#include "cli1-xdr.h" +#include "xdr-generic.h" + +#ifdef GF_LINUX_HOST_OS +#include <mntent.h> +#endif + +char snap_mount_folder[PATH_MAX]; + +static int32_t +glusterd_find_missed_snap (dict_t *rsp_dict, glusterd_volinfo_t *vol, + char *snap_uuid, struct list_head *peers, + int32_t op); + +/* This function will restore a snapshot volumes + * + * @param dict dictionary containing snapshot restore request + * @param op_errstr In case of any failure error message will be returned + * in this variable + * @return Negative value on Failure and 0 in success + */ +int +glusterd_snapshot_restore (dict_t *dict, char **op_errstr, dict_t *rsp_dict) +{ + int ret = -1; + char *volname = NULL; + char *snapname = NULL; + xlator_t *this = NULL; + glusterd_volinfo_t *snap_volinfo = NULL; + glusterd_volinfo_t *volinfo = NULL; + glusterd_snap_t *snap = NULL; + glusterd_conf_t *priv = NULL; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (op_errstr); + GF_ASSERT (rsp_dict); + + priv = this->private; + GF_ASSERT (priv); + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get " + "snap name"); + goto out; + } + + snap = glusterd_find_snap_by_name (snapname); + if (NULL == snap) { + ret = gf_asprintf (op_errstr, "Snap (%s) not found", + snapname); + if (ret < 0) { + goto out; + } + gf_log (this->name, GF_LOG_ERROR, "%s", *op_errstr); + ret = -1; + goto out; + } + + /* TODO : As of now there is only volume in snapshot. + * Change this when multiple volume snapshot is introduced + */ + snap_volinfo = list_entry (snap->volumes.next, glusterd_volinfo_t, + vol_list); + + ret = glusterd_volinfo_find (snap_volinfo->parent_volname, &volinfo); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not get volinfo of " + "%s", snap_volinfo->parent_volname); + goto out; + } + + if (is_origin_glusterd (dict) == _gf_true) { + /* From origin glusterd check if * + * any peers with snap bricks is down */ + ret = glusterd_find_missed_snap (rsp_dict, snap_volinfo, + snap_volinfo->volname, + &priv->peers, + GF_SNAP_OPTION_TYPE_RESTORE); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to find missed snap restores"); + goto out; + } + } + + ret = gd_restore_snap_volume (rsp_dict, volinfo, snap_volinfo); + if (ret) { + /* No need to update op_errstr because it is assumed + * that the called function will do that in case of + * failure. + */ + gf_log (this->name, GF_LOG_ERROR, "Failed to restore " + "snap for %s volume", volname); + goto out; + } + + ret = 0; + + /* TODO: Need to check if we need to delete the snap after the + * operation is successful or not. Also need to persist the state + * of restore operation in the store. + */ +out: + return ret; +} + +/* This function is called before actual restore is taken place. This function + * will validate whether the snapshot volumes are ready to be restored or not. + * + * @param dict dictionary containing snapshot restore request + * @param op_errstr In case of any failure error message will be returned + * in this variable + * @param rsp_dict response dictionary + * @return Negative value on Failure and 0 in success + */ +int +glusterd_snapshot_restore_prevalidate (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + int ret = -1; + int32_t i = 0; + int32_t volcount = 0; + gf_boolean_t snap_restored = _gf_false; + char key[PATH_MAX] = {0, }; + char *volname = NULL; + char *snapname = NULL; + glusterd_volinfo_t *volinfo = NULL; + glusterd_snap_t *snap = NULL; + xlator_t *this = NULL; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (op_errstr); + GF_ASSERT (rsp_dict); + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get " + "snap name"); + goto out; + } + + snap = glusterd_find_snap_by_name (snapname); + if (NULL == snap) { + ret = gf_asprintf (op_errstr, "Snap (%s) not found", + snapname); + if (ret < 0) { + goto out; + } + gf_log (this->name, GF_LOG_ERROR, "%s", *op_errstr); + ret = -1; + goto out; + } + + snap_restored = snap->snap_restored; + + if (snap_restored) { + ret = gf_asprintf (op_errstr, "Snap (%s) is already " + "restored", snapname); + if (ret < 0) { + goto out; + } + gf_log (this->name, GF_LOG_ERROR, "%s", *op_errstr); + ret = -1; + goto out; + } + + ret = dict_set_str (rsp_dict, "snapname", snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set " + "snap name(%s)", snapname); + goto out; + } + + ret = dict_get_int32 (dict, "volcount", &volcount); + + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get volume count"); + goto out; + } + + /* Snapshot restore will only work if all the volumes, + that are part of the snapshot, are stopped. */ + for (i = 1; i <= volcount; ++i) { + snprintf (key, sizeof (key), "volname%d", i); + ret = dict_get_str (dict, key, &volname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "get volume name"); + goto out; + } + + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + ret = gf_asprintf (op_errstr, "Volume (%s) not found", + volname); + if (ret < 0) { + goto out; + } + gf_log (this->name, GF_LOG_ERROR, "%s", *op_errstr); + ret = -1; + goto out; + } + + if (glusterd_is_volume_started (volinfo)) { + ret = gf_asprintf (op_errstr, "Volume (%s) has been " + "started. Volume needs to be stopped before restoring " + "a snapshot.", volname); + if (ret < 0) { + goto out; + } + gf_log (this->name, GF_LOG_ERROR, "%s", *op_errstr); + ret = -1; + goto out; + } + } + + ret = 0; +out: + return ret; +} + +int +snap_max_hard_limits_validate (dict_t *dict, char *volname, + uint64_t value, char **op_errstr) +{ + char err_str[PATH_MAX] = ""; + glusterd_conf_t *conf = NULL; + glusterd_volinfo_t *volinfo = NULL; + int ret = -1; + uint64_t max_limit = GLUSTERD_SNAPS_MAX_HARD_LIMIT; + xlator_t *this = NULL; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (op_errstr); + + conf = this->private; + + GF_ASSERT (conf); + + if (volname) { + ret = glusterd_volinfo_find (volname, &volinfo); + if (!ret) { + if (volinfo->is_snap_volume) { + ret = -1; + snprintf (err_str, PATH_MAX, + "%s is a snap volume. Configuring " + "snap-max-hard-limit for a snap " + "volume is prohibited.", volname); + goto out; + } + } + } + + if (value) { + /* Max limit for the system is GLUSTERD_SNAPS_MAX_HARD_LIMIT + * but max limit for a volume is conf->snap_max_hard_limit. + */ + if (volname) { + max_limit = conf->snap_max_hard_limit; + } else { + max_limit = GLUSTERD_SNAPS_MAX_HARD_LIMIT; + } + } + + if ((value < 0) || (value > max_limit)) { + ret = -1; + snprintf (err_str, PATH_MAX, "Invalid snap-max-hard-limit" + "%"PRIu64 ". Expected range 0 - %"PRIu64, + value, max_limit); + goto out; + } + + ret = 0; +out: + if (ret) { + *op_errstr = gf_strdup (err_str); + gf_log (this->name, GF_LOG_ERROR, "%s", err_str); + } + return ret; +} + +int +glusterd_snapshot_config_prevalidate (dict_t *dict, char **op_errstr) +{ + char *volname = NULL; + glusterd_volinfo_t *volinfo = NULL; + xlator_t *this = NULL; + int ret = -1; + int config_command = 0; + char err_str[PATH_MAX] = {0,}; + glusterd_conf_t *conf = NULL; + uint64_t value = 0; + uint64_t hard_limit = 0; + uint64_t soft_limit = 0; + gf_loglevel_t loglevel = GF_LOG_ERROR; + uint64_t max_limit = GLUSTERD_SNAPS_MAX_HARD_LIMIT; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (op_errstr); + + conf = this->private; + + GF_ASSERT (conf); + + ret = dict_get_int32 (dict, "config-command", &config_command); + if (ret) { + snprintf (err_str, sizeof (err_str), + "failed to get config-command type"); + goto out; + } + + ret = dict_get_uint64 (dict, "snap-max-hard-limit", &hard_limit); + + ret = dict_get_uint64 (dict, "snap-max-soft-limit", &soft_limit); + + ret = dict_get_str (dict, "volname", &volname); + + if (volname) { + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + snprintf (err_str, sizeof (err_str), + "Volume %s does not exist.", volname); + goto out; + } + } + + switch (config_command) { + case GF_SNAP_CONFIG_TYPE_SET: + if (hard_limit) { + /* Validations for snap-max-hard-limits */ + ret = snap_max_hard_limits_validate (dict, volname, + hard_limit, op_errstr); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "snap-max-hard-limit validation " + "failed."); + goto out; + } + } + + if (soft_limit) { + max_limit = GLUSTERD_SNAPS_MAX_SOFT_LIMIT_PERCENT; + if ((soft_limit < 0) || (soft_limit > max_limit)) { + ret = -1; + snprintf (err_str, PATH_MAX, "Invalid " + "snap-max-soft-limit ""%" + PRIu64 ". Expected range 0 - %"PRIu64, + value, max_limit); + goto out; + } + break; + } + default: + break; + } + + ret = 0; +out: + + if (ret && err_str[0] != '\0') { + gf_log (this->name, loglevel, "%s", err_str); + *op_errstr = gf_strdup (err_str); + } + + return ret; +} + +int +glusterd_snap_create_pre_val_use_rsp_dict (dict_t *dst, dict_t *src) +{ + char *snap_brick_dir = NULL; + char *snap_device = NULL; + char *tmpstr = NULL; + char key[PATH_MAX] = ""; + char snapbrckcnt[PATH_MAX] = ""; + char snapbrckord[PATH_MAX] = ""; + int ret = -1; + int64_t i = -1; + int64_t j = -1; + int64_t volume_count = 0; + int64_t brick_count = 0; + int64_t brick_order = 0; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (dst); + GF_ASSERT (src); + + ret = dict_get_int64 (src, "volcount", &volume_count); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "failed to " + "get the volume count"); + goto out; + } + + for (i = 0; i < volume_count; i++) { + memset (snapbrckcnt, '\0', sizeof(snapbrckcnt)); + ret = snprintf (snapbrckcnt, sizeof(snapbrckcnt) - 1, + "vol%ld_brickcount", i+1); + ret = dict_get_int64 (src, snapbrckcnt, &brick_count); + if (ret) { + gf_log (this->name, GF_LOG_TRACE, + "No bricks for this volume in this dict"); + continue; + } + + for (j = 0; j < brick_count; j++) { + /* Fetching data from source dict */ + snprintf (key, sizeof(key) - 1, + "vol%ld.brickdir%ld", i+1, j); + + ret = dict_get_ptr (src, key, + (void **)&snap_brick_dir); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, + "Unable to fetch %s", key); + continue; + } + + snprintf (key, sizeof(key) - 1, + "vol%ld.brick_snapdevice%ld", i+1, j); + + ret = dict_get_ptr (src, key, + (void **)&snap_device); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Unable to fetch snap_device"); + goto out; + } + + snprintf (snapbrckord, sizeof(snapbrckord) - 1, + "vol%ld.brick%ld.order", i+1, j); + + ret = dict_get_int64 (src, snapbrckord, &brick_order); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get brick order"); + goto out; + } + + /* Adding the data in the dst dict */ + snprintf (key, sizeof(key) - 1, + "vol%ld.brickdir%ld", i+1, brick_order); + + tmpstr = gf_strdup (snap_brick_dir); + if (!tmpstr) { + gf_log (this->name, GF_LOG_ERROR, + "Out Of Memory"); + ret = -1; + goto out; + } + ret = dict_set_dynstr (dst, key, tmpstr); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set %s", key); + GF_FREE (tmpstr); + goto out; + } + + snprintf (key, sizeof(key) - 1, + "vol%ld.brick_snapdevice%ld", + i+1, brick_order); + + tmpstr = gf_strdup (snap_device); + if (!tmpstr) { + ret = -1; + goto out; + } + ret = dict_set_dynstr (dst, key, tmpstr); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set %s", key); + GF_FREE (tmpstr); + goto out; + } + } + } + + ret = 0; +out: + + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +int +glusterd_snap_pre_validate_use_rsp_dict (dict_t *dst, dict_t *src) +{ + int ret = -1; + int32_t snap_command = 0; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + + if (!dst || !src) { + gf_log (this->name, GF_LOG_ERROR, "Source or Destination " + "dict is empty."); + goto out; + } + + ret = dict_get_int32 (dst, "type", &snap_command); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "unable to get the type of " + "the snapshot command"); + goto out; + } + + switch (snap_command) { + case GF_SNAP_OPTION_TYPE_CREATE: + ret = glusterd_snap_create_pre_val_use_rsp_dict (dst, src); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to use " + "rsp dict"); + goto out; + } + break; + default: + break; + } + + ret = 0; +out: + gf_log (this->name, GF_LOG_DEBUG, "Returning %d", ret); + return ret; +} + +int +glusterd_snapshot_create_prevalidate (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + char *volname = NULL; + char *snapname = NULL; + char *device = NULL; + char *tmpstr = NULL; + char *brick_dir = NULL; + char snap_brick_dir[PATH_MAX] = ""; + char *mnt_pt = NULL; + char key[PATH_MAX] = ""; + char snap_mount[PATH_MAX] = ""; + char snap_volname[64] = ""; + char err_str[PATH_MAX] = ""; + int ret = -1; + int64_t i = 0; + int64_t volcount = 0; + int64_t brick_count = 0; + int64_t brick_order = 0; + glusterd_brickinfo_t *brickinfo = NULL; + glusterd_volinfo_t *volinfo = NULL; + xlator_t *this = NULL; + uuid_t *snap_volid = NULL; + gf_loglevel_t loglevel = GF_LOG_ERROR; + glusterd_conf_t *conf = NULL; + int64_t effective_max_limit = 0; + + this = THIS; + GF_ASSERT (op_errstr); + conf = this->private; + GF_ASSERT (conf); + + ret = dict_get_int64 (dict, "volcount", &volcount); + if (ret) { + snprintf (err_str, sizeof (err_str), "Failed to " + "get the volume count"); + goto out; + } + if (volcount <= 0) { + snprintf (err_str, sizeof (err_str), "Invalid volume count %ld " + "supplied", volcount); + ret = -1; + goto out; + } + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + snprintf (err_str, sizeof (err_str), "Failed to get snapname"); + goto out; + } + + if (glusterd_find_snap_by_name (snapname)) { + ret = -1; + snprintf (err_str, sizeof (err_str), "Snap %s already exists", + snapname); + goto out; + } + + for (i = 1; i <= volcount; i++) { + snprintf (key, sizeof (key), "volname%ld", i); + ret = dict_get_str (dict, key, &volname); + if (ret) { + snprintf (err_str, sizeof (err_str), + "failed to get volume name"); + goto out; + } + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + snprintf (err_str, sizeof (err_str), + "Volume (%s) does not exist ", volname); + goto out; + } + + ret = -1; + if (!glusterd_is_volume_started (volinfo)) { + snprintf (err_str, sizeof (err_str), "volume %s is " + "not started", volinfo->volname); + loglevel = GF_LOG_WARNING; + goto out; + } + if (glusterd_is_defrag_on (volinfo)) { + snprintf (err_str, sizeof (err_str), + "rebalance process is running for the " + "volume %s", volname); + loglevel = GF_LOG_WARNING; + goto out; + } + /* TODO: Also check whether geo replication is running */ + + if (volinfo->is_snap_volume == _gf_true) { + snprintf (err_str, sizeof (err_str), + "Volume %s is a snap volume", volname); + loglevel = GF_LOG_WARNING; + goto out; + } + + if (volinfo->snap_max_hard_limit < conf->snap_max_hard_limit) + effective_max_limit = volinfo->snap_max_hard_limit; + else + effective_max_limit = conf->snap_max_hard_limit; + + if (volinfo->snap_count >= effective_max_limit) { + snprintf (err_str, sizeof (err_str), + "The number of existing snaps has reached " + "the effective maximum limit of %"PRIu64" ," + "for the volume %s", effective_max_limit, + volname); + loglevel = GF_LOG_WARNING; + goto out; + } + + snprintf (key, sizeof(key) - 1, "vol%ld_volid", i); + ret = dict_get_bin (dict, key, (void **)&snap_volid); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Unable to fetch snap_volid"); + goto out; + } + + /* snap volume uuid is used as lvm snapshot name. + This will avoid restrictions on snapshot names + provided by user */ + GLUSTERD_GET_UUID_NOHYPHEN (snap_volname, *snap_volid); + + brick_count = 0; + brick_order = 0; + /* Adding snap bricks mount paths to the dict */ + list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) { + if (uuid_compare (brickinfo->uuid, MY_UUID)) { + brick_order++; + continue; + } + + if (!glusterd_is_brick_started (brickinfo)) { + gf_log (this->name, GF_LOG_WARNING, + "brick %s:%s is not started", + brickinfo->hostname, + brickinfo->path); + brick_order++; + brick_count++; + continue; + } + + device = glusterd_get_brick_mount_details (brickinfo); + if (!device) { + snprintf (err_str, sizeof (err_str), + "getting device name for the brick " + "%s:%s failed", brickinfo->hostname, + brickinfo->path); + ret = -1; + goto out; + } + + device = glusterd_build_snap_device_path (device, + snap_volname); + if (!device) { + snprintf (err_str, sizeof (err_str), + "cannot copy the snapshot device " + "name (volname: %s, snapname: %s)", + volinfo->volname, snapname); + loglevel = GF_LOG_WARNING; + ret = -1; + goto out; + } + + snprintf (key, sizeof(key), + "vol%ld.brick_snapdevice%ld", i, + brick_count); + ret = dict_set_dynstr (rsp_dict, key, device); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set %s", key); + GF_FREE (device); + goto out; + } + + ret = glusterd_get_brick_root (brickinfo->path, + &mnt_pt); + if (ret) { + snprintf (err_str, sizeof (err_str), + "could not get the root of the brick path %s", + brickinfo->path); + loglevel = GF_LOG_WARNING; + goto out; + } + if (strncmp (brickinfo->path, mnt_pt, strlen(mnt_pt))) { + snprintf (err_str, sizeof (err_str), + "brick: %s brick mount: %s", + brickinfo->path, mnt_pt); + loglevel = GF_LOG_WARNING; + goto out; + } + + brick_dir = &brickinfo->path[strlen (mnt_pt)]; + brick_dir++; + + snprintf (snap_brick_dir, sizeof (snap_brick_dir), + "/%s", brick_dir); + + tmpstr = gf_strdup (snap_brick_dir); + if (!tmpstr) { + ret = -1; + goto out; + } + snprintf (key, sizeof(key), "vol%ld.brickdir%ld", i, + brick_count); + ret = dict_set_dynstr (rsp_dict, key, tmpstr); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set %s", snap_mount); + goto out; + } + tmpstr = NULL; + + snprintf (key, sizeof(key) - 1, "vol%ld.brick%ld.order", + i, brick_count); + ret = dict_set_int64 (rsp_dict, key, brick_order); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set %s", key); + goto out; + } + + brick_count++; + brick_order++; + } + snprintf (key, sizeof(key) - 1, "vol%ld_brickcount", i); + ret = dict_set_int64 (rsp_dict, key, brick_count); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set %s", + key); + goto out; + } + } + + ret = dict_set_int64 (rsp_dict, "volcount", volcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set volcount"); + goto out; + } + + ret = 0; +out: + if (ret) + GF_FREE (tmpstr); + + if (ret && err_str[0] != '\0') { + gf_log (this->name, loglevel, "%s", err_str); + *op_errstr = gf_strdup (err_str); + } + + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +glusterd_snap_t* +glusterd_new_snap_object() +{ + glusterd_snap_t *snap = NULL; + + snap = GF_CALLOC (1, sizeof (*snap), gf_gld_mt_snap_t); + + if (snap) { + if (LOCK_INIT (&snap->lock)) { + gf_log (THIS->name, GF_LOG_ERROR, "Failed initiating" + " snap lock"); + GF_FREE (snap); + return NULL; + } + + INIT_LIST_HEAD (&snap->snap_list); + INIT_LIST_HEAD (&snap->volumes); + snap->snapname[0] = 0; + snap->snap_status = GD_SNAP_STATUS_INIT; + } + + return snap; + +}; + +/* Function glusterd_list_add_snapvol adds the volinfo object (snapshot volume) + to the snapshot object list and to the parent volume list */ +int32_t +glusterd_list_add_snapvol (glusterd_volinfo_t *origin_vol, + glusterd_volinfo_t *snap_vol) +{ + int ret = -1; + glusterd_snap_t *snap = NULL; + + GF_VALIDATE_OR_GOTO ("glusterd", origin_vol, out); + GF_VALIDATE_OR_GOTO ("glusterd", snap_vol, out); + + snap = snap_vol->snapshot; + GF_ASSERT (snap); + + list_add_tail (&snap_vol->vol_list, &snap->volumes); + LOCK (&origin_vol->lock); + { + list_add_order (&snap_vol->snapvol_list, + &origin_vol->snap_volumes, + glusterd_compare_snap_vol_time); + origin_vol->snap_count++; + } + UNLOCK (&origin_vol->lock); + + gf_log (THIS->name, GF_LOG_DEBUG, "Snap %s added to the list", + snap->snapname); + ret = 0; + out: + return ret; +} + +glusterd_snap_t* +glusterd_find_snap_by_name (char *snapname) +{ + glusterd_snap_t *snap = NULL; + glusterd_conf_t *priv = NULL; + + priv = THIS->private; + GF_ASSERT (priv); + GF_ASSERT (snapname); + + list_for_each_entry (snap, &priv->snapshots, snap_list) { + if (!strcmp (snap->snapname, snapname)) { + gf_log (THIS->name, GF_LOG_DEBUG, "Found " + "snap %s (%s)", snap->snapname, + uuid_utoa (snap->snap_id)); + goto out; + } + } + snap = NULL; +out: + return snap; +} + +glusterd_snap_t* +glusterd_find_snap_by_id (uuid_t snap_id) +{ + glusterd_snap_t *snap = NULL; + glusterd_conf_t *priv = NULL; + + priv = THIS->private; + GF_ASSERT (priv); + + if (uuid_is_null(snap_id)) + goto out; + + list_for_each_entry (snap, &priv->snapshots, snap_list) { + if (!uuid_compare (snap->snap_id, snap_id)) { + gf_log (THIS->name, GF_LOG_DEBUG, "Found " + "snap %s (%s)", snap->snapname, + uuid_utoa (snap->snap_id)); + goto out; + } + } + snap = NULL; +out: + return snap; +} + +int +glusterd_do_lvm_snapshot_remove (glusterd_volinfo_t *snap_vol, + glusterd_brickinfo_t *brickinfo, + const char *mount_pt, const char *snap_device) +{ + int ret = -1; + xlator_t *this = NULL; + glusterd_conf_t *priv = NULL; + runner_t runner = {0,}; + char msg[1024] = {0, }; + char pidfile[PATH_MAX] = {0, }; + pid_t pid = -1; + + this = THIS; + GF_ASSERT (this); + priv = this->private; + GF_ASSERT (priv); + + if (!brickinfo) { + gf_log (this->name, GF_LOG_ERROR, "brickinfo NULL"); + goto out; + } + GF_ASSERT (snap_vol); + GF_ASSERT (mount_pt); + GF_ASSERT (snap_device); + + GLUSTERD_GET_BRICK_PIDFILE (pidfile, snap_vol, brickinfo, priv); + if (gf_is_service_running (pidfile, &pid)) { + ret = kill (pid, SIGKILL); + if (ret && errno != ESRCH) { + gf_log (this->name, GF_LOG_ERROR, "Unable to kill pid " + "%d reason : %s", pid, strerror(errno)); + goto out; + } + } + + runinit (&runner); + snprintf (msg, sizeof (msg), "umount the snapshot mounted path %s", + mount_pt); + runner_add_args (&runner, "umount", mount_pt, NULL); + runner_log (&runner, "", GF_LOG_DEBUG, msg); + + /* We need not do synclock_unlock => runner_run => synclock_lock here. + Because it is needed if we are running a glusterfs process in + runner_run, so that when the glusterfs process started wants to + communicate to glusterd, glusterd wont be able to respond if it + has held the big lock. So we do unlock, run glusterfs process + (thus communicate to glusterd), lock. But since this is not a + glusterfs command that is being run, unlocking and then relocking + is not needed. + */ + ret = runner_run (&runner); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "unmounting the " + "path %s (brick: %s) failed (%s)", mount_pt, + brickinfo->path, strerror (errno)); + goto out; + } + + runinit (&runner); + snprintf (msg, sizeof(msg), "remove snapshot of the brick %s:%s, " + "device: %s", brickinfo->hostname, brickinfo->path, + snap_device); + runner_add_args (&runner, "/sbin/lvremove", "-f", snap_device, NULL); + runner_log (&runner, "", GF_LOG_DEBUG, msg); + + ret = runner_run (&runner); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "removing snapshot of the " + "brick (%s:%s) of device %s failed", + brickinfo->hostname, brickinfo->path, snap_device); + goto out; + } + +out: + return ret; +} + +int32_t +glusterd_lvm_snapshot_remove (dict_t *rsp_dict, glusterd_volinfo_t *snap_vol) +{ + char *mnt_pt = NULL; + struct mntent *entry = NULL; + int32_t brick_count = -1; + int32_t ret = -1; + glusterd_brickinfo_t *brickinfo = NULL; + xlator_t *this = NULL; + FILE *mtab = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (rsp_dict); + GF_ASSERT (snap_vol); + + if (!snap_vol) { + gf_log (this->name, GF_LOG_ERROR, "snap volinfo is NULL"); + goto out; + } + + brick_count = -1; + list_for_each_entry (brickinfo, &snap_vol->bricks, brick_list) { + brick_count++; + if (uuid_compare (brickinfo->uuid, MY_UUID)) + continue; + + if (brickinfo->snap_status == -1) { + gf_log (this->name, GF_LOG_INFO, + "snapshot was pending. lvm not present " + "for brick %s:%s of the snap %s.", + brickinfo->hostname, brickinfo->path, + snap_vol->snapshot->snapname); + + /* Adding missed delete to the dict */ + ret = glusterd_add_missed_snaps_to_dict + (rsp_dict, + snap_vol->volname, + brickinfo, + brick_count + 1, + GF_SNAP_OPTION_TYPE_DELETE); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to add missed snapshot info " + "for %s:%s in the rsp_dict", + brickinfo->hostname, + brickinfo->path); + goto out; + } + + continue; + } + + ret = glusterd_get_brick_root (brickinfo->path, &mnt_pt); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "getting the root " + "of the brick for volume %s (snap %s) failed ", + snap_vol->volname, snap_vol->snapshot->snapname); + goto out; + } + + entry = glusterd_get_mnt_entry_info (mnt_pt, mtab); + if (!entry) { + gf_log (this->name, GF_LOG_WARNING, "getting the mount" + " entry for the brick %s:%s of the snap %s " + "(volume: %s) failed", brickinfo->hostname, + brickinfo->path, snap_vol->snapshot->snapname, + snap_vol->volname); + ret = -1; + goto out; + } + ret = glusterd_do_lvm_snapshot_remove (snap_vol, brickinfo, + mnt_pt, + entry->mnt_fsname); + if (mtab) + endmntent (mtab); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "failed to " + "remove the snapshot %s (%s)", + brickinfo->path, entry->mnt_fsname); + goto out; + } + + } + + ret = 0; +out: + return ret; +} + + +int32_t +glusterd_snap_volume_remove (dict_t *rsp_dict, + glusterd_volinfo_t *snap_vol, + gf_boolean_t remove_lvm, + gf_boolean_t force) +{ + int ret = -1; + int save_ret = 0; + glusterd_brickinfo_t *brickinfo = NULL; + glusterd_volinfo_t *origin_vol = NULL; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (rsp_dict); + GF_ASSERT (snap_vol); + + if (!snap_vol) { + gf_log(this->name, GF_LOG_WARNING, "snap_vol in NULL"); + ret = -1; + goto out; + } + + list_for_each_entry (brickinfo, &snap_vol->bricks, brick_list) { + if (uuid_compare (brickinfo->uuid, MY_UUID)) + continue; + + ret = glusterd_brick_stop (snap_vol, brickinfo, _gf_false); + if (ret) { + gf_log(this->name, GF_LOG_WARNING, "Failed to stop " + "brick for volume %s", snap_vol->volname); + save_ret = ret; + + /* Continue to cleaning up the snap in case of error + if force flag is enabled */ + if (!force) + goto out; + } + } + + /* Only remove the backend lvm when required */ + if (remove_lvm) { + ret = glusterd_lvm_snapshot_remove (rsp_dict, snap_vol); + if (ret) { + gf_log(this->name, GF_LOG_WARNING, "Failed to remove " + "lvm snapshot volume %s", snap_vol->volname); + save_ret = ret; + if (!force) + goto out; + } + } + + ret = glusterd_store_delete_volume (snap_vol); + if (ret) { + gf_log(this->name, GF_LOG_WARNING, "Failed to remove volume %s " + "from store", snap_vol->volname); + save_ret = ret; + if (!force) + goto out; + } + + if (!list_empty(&snap_vol->snapvol_list)) { + ret = glusterd_volinfo_find (snap_vol->parent_volname, + &origin_vol); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get " + "parent volinfo %s for volume %s", + snap_vol->parent_volname, snap_vol->volname); + save_ret = ret; + if (!force) + goto out; + } + origin_vol->snap_count--; + } + + ret = glusterd_volinfo_delete (snap_vol); + if (ret) { + gf_log(this->name, GF_LOG_WARNING, "Failed to remove volinfo " + "%s ", snap_vol->volname); + save_ret = ret; + if (!force) + goto out; + } + + if (save_ret) + ret = save_ret; +out: + gf_log (this->name, GF_LOG_TRACE, "returning %d", ret); + return ret; +} + +int32_t +glusterd_snapobject_delete (glusterd_snap_t *snap) +{ + if (snap == NULL) { + gf_log(THIS->name, GF_LOG_WARNING, "snap is NULL"); + return -1; + } + + list_del_init (&snap->snap_list); + list_del_init (&snap->volumes); + if (LOCK_DESTROY(&snap->lock)) + gf_log (THIS->name, GF_LOG_WARNING, "Failed destroying lock" + "of snap %s", snap->snapname); + + GF_FREE (snap->description); + GF_FREE (snap); + + return 0; +} + +int32_t +glusterd_snap_remove (dict_t *rsp_dict, + glusterd_snap_t *snap, + gf_boolean_t remove_lvm, + gf_boolean_t force) +{ + int ret = -1; + int save_ret = 0; + glusterd_volinfo_t *snap_vol = NULL; + glusterd_volinfo_t *tmp = NULL; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (rsp_dict); + GF_ASSERT (snap); + + if (!snap) { + gf_log(this->name, GF_LOG_WARNING, "snap is NULL"); + ret = -1; + goto out; + } + + list_for_each_entry_safe (snap_vol, tmp, &snap->volumes, vol_list) { + ret = glusterd_snap_volume_remove (rsp_dict, snap_vol, + remove_lvm, force); + if (ret) { + gf_log(this->name, GF_LOG_WARNING, "Failed to remove " + "volinfo %s for snap %s", snap_vol->volname, + snap->snapname); + save_ret = ret; + + /* Continue to cleaning up the snap in case of error + if force flag is enabled */ + if (!force) + goto out; + } + } + + ret = glusterd_store_delete_snap (snap); + if (ret) { + gf_log(this->name, GF_LOG_WARNING, "Failed to remove snap %s " + "from store", snap->snapname); + save_ret = ret; + if (!force) + goto out; + } + + ret = glusterd_snapobject_delete (snap); + if (ret) + gf_log (this->name, GF_LOG_WARNING, "Failed to delete " + "snap object %s", snap->snapname); + + if (save_ret) + ret = save_ret; +out: + gf_log (THIS->name, GF_LOG_TRACE, "returning %d", ret); + return ret; +} + +static int +glusterd_snapshot_get_snapvol_detail (dict_t *dict, + glusterd_volinfo_t *snap_vol, + char *keyprefix, int detail) +{ + int ret = -1; + int snap_limit = 0; + char key[PATH_MAX] = {0,}; + char *value = NULL; + glusterd_volinfo_t *origin_vol = NULL; + glusterd_conf_t *conf = NULL; + xlator_t *this = NULL; + + this = THIS; + conf = this->private; + GF_ASSERT (conf); + + GF_ASSERT (dict); + GF_ASSERT (snap_vol); + GF_ASSERT (keyprefix); + + /* Volume Name */ + value = gf_strdup (snap_vol->volname); + if (!value) + goto out; + + snprintf (key, sizeof (key), "%s.volname", keyprefix); + ret = dict_set_dynstr (dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set " + "volume name in dictionary: %s", key); + goto out; + } + + /* Volume ID */ + value = gf_strdup (uuid_utoa (snap_vol->volume_id)); + if (NULL == value) { + ret = -1; + goto out; + } + + snprintf (key, sizeof (key), "%s.vol-id", keyprefix); + ret = dict_set_dynstr (dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set " + "volume id in dictionary: %s", key); + goto out; + } + value = NULL; + + /* volume status */ + snprintf (key, sizeof (key), "%s.vol-status", keyprefix); + switch (snap_vol->status) { + case GLUSTERD_STATUS_STARTED: + ret = dict_set_str (dict, key, "Started"); + break; + case GLUSTERD_STATUS_STOPPED: + ret = dict_set_str (dict, key, "Stopped"); + break; + case GD_SNAP_STATUS_NONE: + ret = dict_set_str (dict, key, "None"); + break; + default: + gf_log (this->name, GF_LOG_ERROR, "Invalid volume status"); + ret = -1; + goto out; + } + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set volume status" + " in dictionary: %s", key); + goto out; + } + + + ret = glusterd_volinfo_find (snap_vol->parent_volname, &origin_vol); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "failed to get the parent " + "volinfo for the volume %s", snap_vol->volname); + goto out; + } + + /* Snaps available */ + if (conf->snap_max_hard_limit < origin_vol->snap_max_hard_limit) { + snap_limit = conf->snap_max_hard_limit; + gf_log(this->name, GF_LOG_DEBUG, "system snap-max-hard-limit is" + " lesser than volume snap-max-hard-limit, " + "snap-max-hard-limit value is set to %d", snap_limit); + } else { + snap_limit = origin_vol->snap_max_hard_limit; + gf_log(this->name, GF_LOG_DEBUG, "volume snap-max-hard-limit is" + " lesser than system snap-max-hard-limit, " + "snap-max-hard-limit value is set to %d", snap_limit); + } + + snprintf (key, sizeof (key), "%s.snaps-available", keyprefix); + if (snap_limit > origin_vol->snap_count) + ret = dict_set_int32 (dict, key, + snap_limit - origin_vol->snap_count); + else + ret = dict_set_int32 (dict, key, 0); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set available snaps"); + goto out; + } + + snprintf (key, sizeof (key), "%s.snapcount", keyprefix); + ret = dict_set_int32 (dict, key, origin_vol->snap_count); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not save snapcount"); + goto out; + } + + if (!detail) + goto out; + + /* Parent volume name */ + value = gf_strdup (snap_vol->parent_volname); + if (!value) + goto out; + + snprintf (key, sizeof (key), "%s.origin-volname", keyprefix); + ret = dict_set_dynstr (dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set parent " + "volume name in dictionary: %s", key); + goto out; + } + value = NULL; + + ret = 0; +out: + if (value) + GF_FREE (value); + + return ret; +} + +static int +glusterd_snapshot_get_snap_detail (dict_t *dict, glusterd_snap_t *snap, + char *keyprefix, glusterd_volinfo_t *volinfo) +{ + int ret = -1; + int volcount = 0; + char key[PATH_MAX] = {0,}; + char *value = NULL; + char *timestr = NULL; + struct tm *tmptr = NULL; + glusterd_volinfo_t *snap_vol = NULL; + glusterd_volinfo_t *tmp_vol = NULL; + xlator_t *this = NULL; + + this = THIS; + + GF_ASSERT (dict); + GF_ASSERT (snap); + GF_ASSERT (keyprefix); + + /* Snap Name */ + value = gf_strdup (snap->snapname); + if (!value) + goto out; + + snprintf (key, sizeof (key), "%s.snapname", keyprefix); + ret = dict_set_dynstr (dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set " + "snap name in dictionary"); + goto out; + } + + /* Snap ID */ + value = gf_strdup (uuid_utoa (snap->snap_id)); + if (NULL == value) { + ret = -1; + goto out; + } + + snprintf (key, sizeof (key), "%s.snap-id", keyprefix); + ret = dict_set_dynstr (dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set " + "snap id in dictionary"); + goto out; + } + value = NULL; + + tmptr = localtime (&(snap->time_stamp)); + if (NULL == tmptr) { + gf_log (this->name, GF_LOG_ERROR, "Failed to convert " + "time_t to *tm"); + ret = -1; + goto out; + } + + timestr = GF_CALLOC (1, PATH_MAX, gf_gld_mt_char); + if (NULL == timestr) { + ret = -1; + goto out; + } + + ret = strftime (timestr, PATH_MAX, "%Y-%m-%d %H:%M:%S", tmptr); + if (0 == ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to convert time_t " + "to string"); + ret = -1; + goto out; + } + + snprintf (key, sizeof (key), "%s.snap-time", keyprefix); + ret = dict_set_dynstr (dict, key, timestr); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set " + "snap time stamp in dictionary"); + goto out; + } + timestr = NULL; + + /* If snap description is provided then add that into dictionary */ + if (NULL != snap->description) { + value = gf_strdup (snap->description); + if (NULL == value) { + ret = -1; + goto out; + } + + snprintf (key, sizeof (key), "%s.snap-desc", keyprefix); + ret = dict_set_dynstr (dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set " + "snap description in dictionary"); + goto out; + } + value = NULL; + } + + snprintf (key, sizeof (key), "%s.snap-status", keyprefix); + switch (snap->snap_status) { + case GD_SNAP_STATUS_INIT: + ret = dict_set_str (dict, key, "Init"); + break; + case GD_SNAP_STATUS_IN_USE: + ret = dict_set_str (dict, key, "In-use"); + break; + case GD_SNAP_STATUS_DECOMMISSION: + ret = dict_set_str (dict, key, "Decommisioned"); + break; + case GD_SNAP_STATUS_RESTORED: + ret = dict_set_str (dict, key, "Restored"); + break; + case GD_SNAP_STATUS_NONE: + ret = dict_set_str (dict, key, "None"); + break; + default: + gf_log (this->name, GF_LOG_ERROR, "Invalid snap status"); + ret = -1; + goto out; + } + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set snap status " + "in dictionary"); + goto out; + } + + if (volinfo) { + volcount = 1; + snprintf (key, sizeof (key), "%s.vol%d", keyprefix, volcount); + ret = glusterd_snapshot_get_snapvol_detail (dict, + volinfo, key, 0); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "get volume detail %s for snap %s", + snap_vol->volname, snap->snapname); + goto out; + } + goto done; + } + + list_for_each_entry_safe (snap_vol, tmp_vol, &snap->volumes, vol_list) { + volcount++; + snprintf (key, sizeof (key), "%s.vol%d", keyprefix, volcount); + ret = glusterd_snapshot_get_snapvol_detail (dict, + snap_vol, key, 1); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "get volume detail %s for snap %s", + snap_vol->volname, snap->snapname); + goto out; + } + } + +done: + snprintf (key, sizeof (key), "%s.vol-count", keyprefix); + ret = dict_set_int32 (dict, key, volcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set %s", + key); + goto out; + } + + ret = 0; +out: + if (value) + GF_FREE (value); + + if (timestr) + GF_FREE(timestr); + + return ret; +} + +static int +glusterd_snapshot_get_all_snap_info (dict_t *dict) +{ + int ret = -1; + int snapcount = 0; + char key[PATH_MAX] = {0,}; + glusterd_snap_t *snap = NULL; + glusterd_snap_t *tmp_snap = NULL; + glusterd_conf_t *priv = NULL; + xlator_t *this = NULL; + + this = THIS; + priv = this->private; + GF_ASSERT (priv); + + /* General parameter validation */ + GF_ASSERT (dict); + + list_for_each_entry_safe (snap, tmp_snap, &priv->snapshots, snap_list) { + snapcount++; + snprintf (key, sizeof (key), "snap%d", snapcount); + ret = glusterd_snapshot_get_snap_detail (dict, snap, key, NULL); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get " + "snapdetail for snap %s", snap->snapname); + goto out; + } + } + + ret = dict_set_int32 (dict, "snap-count", snapcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set snapcount"); + goto out; + } + + ret = 0; +out: + return ret; +} + +int +glusterd_snapshot_get_info_by_volume (dict_t *dict, char *volname, + char *err_str, size_t len) +{ + int ret = -1; + int snapcount = 0; + int snap_limit = 0; + char *value = NULL; + char key[PATH_MAX] = ""; + glusterd_volinfo_t *volinfo = NULL; + glusterd_volinfo_t *snap_vol = NULL; + glusterd_volinfo_t *tmp_vol = NULL; + glusterd_conf_t *conf = NULL; + xlator_t *this = NULL; + + this = THIS; + conf = this->private; + GF_ASSERT (conf); + + GF_ASSERT (dict); + GF_ASSERT (volname); + + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + snprintf (err_str, len, "Volume (%s) does not exist", volname); + gf_log (this->name, GF_LOG_ERROR, "%s", err_str); + goto out; + } + + /* Snaps available */ + if (conf->snap_max_hard_limit < volinfo->snap_max_hard_limit) { + snap_limit = conf->snap_max_hard_limit; + gf_log(this->name, GF_LOG_DEBUG, "system snap-max-hard-limit is" + " lesser than volume snap-max-hard-limit, " + "snap-max-hard-limit value is set to %d", snap_limit); + } else { + snap_limit = volinfo->snap_max_hard_limit; + gf_log(this->name, GF_LOG_DEBUG, "volume snap-max-hard-limit is" + " lesser than system snap-max-hard-limit, " + "snap-max-hard-limit value is set to %d", snap_limit); + } + + if (snap_limit > volinfo->snap_count) + ret = dict_set_int32 (dict, "snaps-available", + snap_limit - volinfo->snap_count); + else + ret = dict_set_int32 (dict, "snaps-available", 0); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set available snaps"); + goto out; + } + + /* Origin volume name */ + value = gf_strdup (volinfo->volname); + if (!value) + goto out; + + ret = dict_set_dynstr (dict, "origin-volname", value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set parent " + "volume name in dictionary: %s", key); + goto out; + } + value = NULL; + + list_for_each_entry_safe (snap_vol, tmp_vol, &volinfo->snap_volumes, + snapvol_list) { + snapcount++; + snprintf (key, sizeof (key), "snap%d", snapcount); + ret = glusterd_snapshot_get_snap_detail (dict, + snap_vol->snapshot, + key, snap_vol); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get " + "snapdetail for snap %s", + snap_vol->snapshot->snapname); + goto out; + } + } + ret = dict_set_int32 (dict, "snap-count", snapcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set snapcount"); + goto out; + } + + ret = 0; +out: + if (value) + GF_FREE (value); + + return ret; +} + +/* This function will be called from RPC handler routine. + * This function is responsible for getting the requested + * snapshot info into the dictionary. + * + * @param req RPC request object. Required for sending a response back. + * @param op glusterd operation. Required for sending a response back. + * @param dict pointer to dictionary which will contain both + * request and response key-pair values. + * @return -1 on error and 0 on success + */ +int +glusterd_handle_snapshot_info (rpcsvc_request_t *req, glusterd_op_t op, + dict_t *dict, char *err_str, size_t len) +{ + int ret = -1; + int8_t snap_driven = 1; + char *volname = NULL; + char *snapname = NULL; + glusterd_snap_t *snap = NULL; + xlator_t *this = NULL; + int32_t cmd = GF_SNAP_INFO_TYPE_ALL; + + this = THIS; + GF_ASSERT (this); + + GF_VALIDATE_OR_GOTO (this->name, req, out); + GF_VALIDATE_OR_GOTO (this->name, dict, out); + + + ret = dict_get_int32 (dict, "cmd", &cmd); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get type " + "of snapshot info"); + goto out; + } + + switch (cmd) { + case GF_SNAP_INFO_TYPE_ALL: + { + ret = glusterd_snapshot_get_all_snap_info (dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get info of all snaps"); + goto out; + } + break; + } + + case GF_SNAP_INFO_TYPE_SNAP: + { + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get snap name"); + goto out; + } + + ret = dict_set_int32 (dict, "snap-count", 1); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set snapcount"); + goto out; + } + + snap = glusterd_find_snap_by_name (snapname); + if (!snap) { + snprintf (err_str, len, + "Snap (%s) does not exist", snapname); + gf_log (this->name, GF_LOG_ERROR, + "%s", err_str); + ret = -1; + goto out; + } + ret = glusterd_snapshot_get_snap_detail (dict, snap, + "snap1", NULL); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get snap detail of snap " + "%s", snap->snapname); + goto out; + } + break; + } + + case GF_SNAP_INFO_TYPE_VOL: + { + ret = dict_get_str (dict, "volname", &volname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get volname"); + goto out; + } + ret = glusterd_snapshot_get_info_by_volume (dict, + volname, err_str, len); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get volume info of volume " + "%s", volname); + goto out; + } + snap_driven = 0; + break; + } + } + + ret = dict_set_int8 (dict, "snap-driven", snap_driven); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set snap-driven"); + goto out; + } + + /* If everything is successful then send the response back to cli. + * In case of failure the caller of this function will take care + of the response */ + ret = glusterd_op_send_cli_response (op, 0, 0, req, dict, err_str); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to send cli " + "response"); + goto out; + } + + ret = 0; + +out: + return ret; +} + +/* This function sets all the snapshot names in the dictionary */ +int +glusterd_snapshot_get_all_snapnames (dict_t *dict) +{ + int ret = -1; + int snapcount = 0; + char *snapname = NULL; + char key[PATH_MAX] = {0,}; + glusterd_snap_t *snap = NULL; + glusterd_snap_t *tmp_snap = NULL; + glusterd_conf_t *priv = NULL; + xlator_t *this = NULL; + + this = THIS; + priv = this->private; + GF_ASSERT (priv); + GF_ASSERT (dict); + + list_for_each_entry_safe (snap, tmp_snap, &priv->snapshots, snap_list) { + snapcount++; + snapname = gf_strdup (snap->snapname); + if (!snapname) { + gf_log (this->name, GF_LOG_ERROR, "strdup failed"); + ret = -1; + goto out; + } + snprintf (key, sizeof (key), "snapname%d", snapcount); + ret = dict_set_dynstr (dict, key, snapname); + if (ret) { + GF_FREE (snapname); + gf_log (this->name, GF_LOG_ERROR, "Failed to set %s", + key); + goto out; + } + } + + ret = dict_set_int32 (dict, "snap-count", snapcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set snapcount"); + goto out; + } + + ret = 0; +out: + + return ret; +} + +/* This function sets all the snapshot names + under a given volume in the dictionary */ +int +glusterd_snapshot_get_vol_snapnames (dict_t *dict, glusterd_volinfo_t *volinfo) +{ + int ret = -1; + int snapcount = 0; + char *snapname = NULL; + char key[PATH_MAX] = {0,}; + glusterd_volinfo_t *snap_vol = NULL; + glusterd_volinfo_t *tmp_vol = NULL; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (dict); + GF_ASSERT (volinfo); + + list_for_each_entry_safe (snap_vol, tmp_vol, + &volinfo->snap_volumes, snapvol_list) { + snapcount++; + snapname = gf_strdup (snap_vol->snapshot->snapname); + if (!snapname) { + gf_log (this->name, GF_LOG_ERROR, + "strdup failed"); + ret = -1; + goto out; + } + snprintf (key, sizeof (key), "snapname%d", snapcount); + ret = dict_set_dynstr (dict, key, snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "set %s", key); + GF_FREE (snapname); + goto out; + } + } + + ret = dict_set_int32 (dict, "snap-count", snapcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set snapcount"); + goto out; + } + + ret = 0; +out: + + return ret; +} + +int +glusterd_handle_snapshot_list (rpcsvc_request_t *req, glusterd_op_t op, + dict_t *dict, char *err_str, size_t len) +{ + int ret = -1; + char *volname = NULL; + glusterd_volinfo_t *volinfo = NULL; + xlator_t *this = NULL; + + this = THIS; + + GF_VALIDATE_OR_GOTO (this->name, req, out); + GF_VALIDATE_OR_GOTO (this->name, dict, out); + + /* Ignore error for getting volname as it is optional */ + ret = dict_get_str (dict, "volname", &volname); + + if (NULL == volname) { + ret = glusterd_snapshot_get_all_snapnames (dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get snapshot list"); + goto out; + } + } else { + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + snprintf (err_str, len, + "Volume (%s) does not exist", volname); + gf_log (this->name, GF_LOG_ERROR, + "%s", err_str); + goto out; + } + + ret = glusterd_snapshot_get_vol_snapnames (dict, volinfo); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get snapshot list for volume %s", + volname); + goto out; + } + } + + /* If everything is successful then send the response back to cli. + In case of failure the caller of this function will take of response.*/ + ret = glusterd_op_send_cli_response (op, 0, 0, req, dict, err_str); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to send cli " + "response"); + goto out; + } + + ret = 0; + +out: + return ret; +} + +/* This is a snapshot create handler function. This function will be + * executed in the originator node. This function is responsible for + * calling mgmt_v3 framework to do the actual snap creation on all the bricks + * + * @param req RPC request object + * @param op gluster operation + * @param dict dictionary containing snapshot restore request + * @param err_str In case of an err this string should be populated + * @param len length of err_str buffer + * + * @return Negative value on Failure and 0 in success + */ +int +glusterd_handle_snapshot_create (rpcsvc_request_t *req, glusterd_op_t op, + dict_t *dict, char *err_str, size_t len) +{ + int ret = -1; + char *volname = NULL; + char *snapname = NULL; + int64_t volcount = 0; + xlator_t *this = NULL; + char key[PATH_MAX] = ""; + char *username = NULL; + char *password = NULL; + uuid_t *uuid_ptr = NULL; + uuid_t tmp_uuid = {0}; + int i = 0; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (req); + GF_ASSERT (dict); + GF_ASSERT (err_str); + + ret = dict_get_int64 (dict, "volcount", &volcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "failed to " + "get the volume count"); + goto out; + } + if (volcount <= 0) { + gf_log (this->name, GF_LOG_ERROR, "Invalid volume count %ld " + "supplied", volcount); + ret = -1; + goto out; + } + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "failed to get the snapname"); + goto out; + } + + if (strlen(snapname) >= GLUSTERD_MAX_SNAP_NAME) { + snprintf (err_str, len, "snapname cannot exceed 255 " + "characters"); + gf_log (this->name, GF_LOG_ERROR, "%s", err_str); + ret = -1; + goto out; + } + + uuid_ptr = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t); + if (!uuid_ptr) { + gf_log (this->name, GF_LOG_ERROR, "Out Of Memory"); + ret = -1; + goto out; + } + + uuid_generate (*uuid_ptr); + ret = dict_set_bin (dict, "snap-id", uuid_ptr, sizeof(uuid_t)); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to set snap-id"); + GF_FREE (uuid_ptr); + goto out; + } + uuid_ptr = NULL; + + ret = dict_set_int64 (dict, "snap-time", (int64_t)time(NULL)); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to set snap-time"); + goto out; + } + + for (i = 1; i <= volcount; i++) { + snprintf (key, sizeof (key), "volname%d", i); + ret = dict_get_str (dict, key, &volname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get volume name"); + goto out; + } + + /* generate internal username and password for the snap*/ + uuid_generate (tmp_uuid); + username = gf_strdup (uuid_utoa (tmp_uuid)); + snprintf (key, sizeof(key), "volume%d_username", i); + ret = dict_set_dynstr (dict, key, username); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set snap " + "username for volume %s", volname); + GF_FREE (username); + goto out; + } + + uuid_generate (tmp_uuid); + password = gf_strdup (uuid_utoa (tmp_uuid)); + snprintf (key, sizeof(key), "volume%d_password", i); + ret = dict_set_dynstr (dict, key, password); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set snap " + "password for volume %s", volname); + GF_FREE (password); + goto out; + } + + uuid_ptr = GF_CALLOC (1, sizeof(uuid_t), gf_common_mt_uuid_t); + if (!uuid_ptr) { + gf_log (this->name, GF_LOG_ERROR, "Out Of Memory"); + ret = -1; + goto out; + } + + snprintf (key, sizeof(key) - 1, "vol%d_volid", i); + uuid_generate (*uuid_ptr); + ret = dict_set_bin (dict, key, uuid_ptr, sizeof(uuid_t)); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Unable to set snap_volid"); + GF_FREE (uuid_ptr); + goto out; + } + } + + ret = glusterd_mgmt_v3_initiate_snap_phases (req, op, dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to initiate snap " + "phases"); + } + +out: + return ret; +} + +/* This is a snapshot status handler function. This function will be + * executed in a originator node. This function is responsible for + * calling mgmt v3 framework to get the actual snapshot status from + * all the bricks + * + * @param req RPC request object + * @param op gluster operation + * @param dict dictionary containing snapshot status request + * @param err_str In case of an err this string should be populated + * @param len length of err_str buffer + * + * return : 0 in case of success. + * -1 in case of failure. + * + */ +int +glusterd_handle_snapshot_status (rpcsvc_request_t *req, glusterd_op_t op, + dict_t *dict, char *err_str, size_t len) +{ + int ret = -1; + char *volname = NULL; + char *snapname = NULL; + char *buf = NULL; + glusterd_conf_t *conf = NULL; + xlator_t *this = NULL; + int32_t cmd = -1; + int i = 0; + dict_t *voldict = NULL; + char key[PATH_MAX] = ""; + glusterd_volinfo_t *volinfo = NULL; + glusterd_snap_t *snap = NULL; + glusterd_volinfo_t *snap_volinfo = NULL; + + this = THIS; + GF_ASSERT (this); + conf = this->private; + + GF_ASSERT (conf); + GF_ASSERT (req); + GF_ASSERT (dict); + GF_ASSERT (err_str); + + ret = dict_get_int32 (dict, "cmd", &cmd); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not get status type"); + goto out; + } + switch (cmd) { + case GF_SNAP_STATUS_TYPE_ALL: + { + /* IF we give "gluster snapshot status" + * then lock is held on all snaps. + * This is the place where necessary information + * (snapname and snapcount)is populated in dictionary + * for locking. + */ + ++i; + list_for_each_entry (snap, &conf->snapshots, snap_list) + { + snprintf (key, sizeof (key), "snapname%d", i); + buf = gf_strdup (snap->snapname); + if (!buf) { + ret = -1; + goto out; + } + ret = dict_set_dynstr (dict, key, buf); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save snapname (%s) " + "in the dictionary", + snap->snapname); + GF_FREE (buf); + goto out; + } + + buf = NULL; + i++; + } + + ret = dict_set_int32 (dict, "snapcount", i - 1); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not " + "save snapcount in the dictionary"); + goto out; + } + break; + } + + case GF_SNAP_STATUS_TYPE_SNAP: + { + /* IF we give "gluster snapshot status <snapname>" + * then lock is held on single snap. + * This is the place where necessary information + * (snapname)is populated in dictionary + * for locking. + */ + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to fetch snap name"); + goto out; + } + + snap = glusterd_find_snap_by_name (snapname); + if (!snap) { + snprintf (err_str, len, "Snap (%s)" + "does not exist", snapname); + gf_log(this->name, GF_LOG_ERROR, + "%s", err_str); + ret = -1; + goto out; + } + break; + } + case GF_SNAP_STATUS_TYPE_VOL: + ret = dict_get_str (dict, "volname", &volname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to fetch volname"); + goto out; + } + + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + snprintf (err_str, len, "Volume (%s) " + "does not exist", volname); + gf_log (this->name, GF_LOG_ERROR, + "%s", err_str); + goto out; + } + + i = 1; + list_for_each_entry (snap_volinfo, + &volinfo->snap_volumes, snapvol_list) { + snprintf (key, sizeof (key), "snapname%d", i); + + buf = gf_strdup + (snap_volinfo->snapshot->snapname); + if (!buf) { + ret = -1; + goto out; + } + + ret = dict_set_dynstr (dict, key, buf); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save snapname"); + GF_FREE (buf); + goto out; + } + + buf = NULL; + i++; + } + + ret = dict_set_int32 (dict, "snapcount", i-1); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save snapcount"); + goto out; + } + break; + default: + { + gf_log (this->name, GF_LOG_ERROR, "Unknown type"); + ret = -1; + goto out; + } + } + + /* Volume lock is not necessary for snapshot status, hence + * turning it off + */ + ret = dict_set_int8 (dict, "hold_vol_locks", 0); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Setting volume lock " + "flag failed"); + goto out; + } + + ret = glusterd_mgmt_v3_initiate_snap_phases (req, op, dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to initiate " + "snap phases"); + goto out; + } + + ret = 0; + +out: + if (voldict) { + dict_unref (voldict); + } + return ret; +} + + +/* This is a snapshot restore handler function. This function will be + * executed in the originator node. This function is responsible for + * calling mgmt_v3 framework to do the actual restore on all the bricks + * + * @param req RPC request object + * @param op gluster operation + * @param dict dictionary containing snapshot restore request + * @param err_str In case of an err this string should be populated + * @param len length of err_str buffer + * + * @return Negative value on Failure and 0 in success + */ +int +glusterd_handle_snapshot_restore (rpcsvc_request_t *req, glusterd_op_t op, + dict_t *dict, char *err_str, size_t len) +{ + int ret = -1; + char *snapname = NULL; + char *buf = NULL; + glusterd_conf_t *conf = NULL; + xlator_t *this = NULL; + glusterd_snap_t *snap = NULL; + glusterd_volinfo_t *snap_volinfo = NULL; + int32_t i = 0; + char key[PATH_MAX] = ""; + + this = THIS; + GF_ASSERT (this); + conf = this->private; + + GF_ASSERT (conf); + GF_ASSERT (req); + GF_ASSERT (dict); + GF_ASSERT (err_str); + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "get snapname"); + goto out; + } + + snap = glusterd_find_snap_by_name (snapname); + if (!snap) { + snprintf (err_str, len, "Snap (%s) does not exist", snapname); + gf_log (this->name, GF_LOG_ERROR, "%s", err_str); + ret = -1; + goto out; + } + + list_for_each_entry (snap_volinfo, &snap->volumes, vol_list) { + i++; + snprintf (key, sizeof (key), "volname%d", i); + buf = gf_strdup (snap_volinfo->parent_volname); + if (!buf) { + ret = -1; + goto out; + } + ret = dict_set_dynstr (dict, key, buf); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not set " + "parent volume name %s in the dict", + snap_volinfo->parent_volname); + GF_FREE (buf); + goto out; + } + buf = NULL; + } + + ret = dict_set_int32 (dict, "volcount", i); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save volume count"); + goto out; + } + + ret = glusterd_mgmt_v3_initiate_snap_phases (req, op, dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to initiate snap " + "phases"); + goto out; + } + + ret = 0; + +out: + return ret; +} + +glusterd_snap_t* +glusterd_create_snap_object (dict_t *dict, dict_t *rsp_dict) +{ + char *snapname = NULL; + uuid_t *snap_id = NULL; + char *description = NULL; + glusterd_snap_t *snap = NULL; + xlator_t *this = NULL; + glusterd_conf_t *priv = NULL; + int ret = -1; + int64_t time_stamp = 0; + + this = THIS; + priv = this->private; + + GF_ASSERT (dict); + GF_ASSERT (rsp_dict); + + /* Fetch snapname, description, id and time from dict */ + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to fetch snapname"); + goto out; + } + + /* Ignore ret value for description*/ + ret = dict_get_str (dict, "description", &description); + + ret = dict_get_bin (dict, "snap-id", (void **)&snap_id); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to fetch snap_id"); + goto out; + } + + ret = dict_get_int64 (dict, "snap-time", &time_stamp); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to fetch snap-time"); + goto out; + } + if (time_stamp <= 0) { + ret = -1; + gf_log (this->name, GF_LOG_ERROR, "Invalid time-stamp: %ld", + time_stamp); + goto out; + } + + list_for_each_entry (snap, &priv->snapshots, snap_list) { + if (!strcmp (snap->snapname, snapname) || + !uuid_compare (snap->snap_id, *snap_id)) { + gf_log (THIS->name, GF_LOG_ERROR, + "Found duplicate snap %s (%s)", + snap->snapname, uuid_utoa (snap->snap_id)); + ret = -1; + break; + } + } + if (ret) { + snap = NULL; + goto out; + } + + snap = glusterd_new_snap_object (); + if (!snap) { + gf_log (this->name, GF_LOG_ERROR, "Could not create " + "the snap object for snap %s", snapname); + goto out; + } + + strcpy (snap->snapname, snapname); + uuid_copy (snap->snap_id, *snap_id); + snap->time_stamp = (time_t)time_stamp; + /* Set the status as GD_SNAP_STATUS_INIT and once the backend snapshot + is taken and snap is really ready to use, set the status to + GD_SNAP_STATUS_IN_USE. This helps in identifying the incomplete + snapshots and cleaning them up. + */ + snap->snap_status = GD_SNAP_STATUS_INIT; + if (description) { + snap->description = gf_strdup (description); + if (snap->description == NULL) { + gf_log (this->name, GF_LOG_ERROR, + "Saving the Snap Description Failed"); + ret = -1; + goto out; + } + } + + ret = glusterd_store_snap (snap); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Could not store snap" + "object %s", snap->snapname); + goto out; + } + + list_add_order (&snap->snap_list, &priv->snapshots, + glusterd_compare_snap_time); + + gf_log (this->name, GF_LOG_TRACE, "Snap %s added to the list", + snap->snapname); + + ret = 0; + +out: + if (ret) { + if (snap) + glusterd_snap_remove (rsp_dict, snap, + _gf_true, _gf_true); + snap = NULL; + } + + return snap; +} + +/* Added missed_snap_entry to rsp_dict */ +int32_t +glusterd_add_missed_snaps_to_dict (dict_t *rsp_dict, char *snap_uuid, + glusterd_brickinfo_t *brickinfo, + int32_t brick_number, int32_t op) +{ + char *buf = NULL; + char missed_snap_entry[PATH_MAX] = ""; + char name_buf[PATH_MAX] = ""; + int32_t missed_snap_count = -1; + int32_t ret = -1; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (rsp_dict); + GF_ASSERT (snap_uuid); + GF_ASSERT (brickinfo); + + snprintf (missed_snap_entry, sizeof(missed_snap_entry), + "%s:%s=%d:%s:%d:%d", uuid_utoa(brickinfo->uuid), + snap_uuid, brick_number, brickinfo->path, op, + GD_MISSED_SNAP_PENDING); + + buf = gf_strdup (missed_snap_entry); + if (!buf) { + ret = -1; + goto out; + } + + /* Fetch the missed_snap_count from the dict */ + ret = dict_get_int32 (rsp_dict, "missed_snap_count", + &missed_snap_count); + if (ret) { + /* Initialize the missed_snap_count for the first time */ + missed_snap_count = 0; + } + + /* Setting the missed_snap_entry in the rsp_dict */ + snprintf (name_buf, sizeof(name_buf), "missed_snaps_%d", + missed_snap_count); + ret = dict_set_dynstr (rsp_dict, name_buf, buf); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set missed_snap_entry (%s) " + "in the rsp_dict.", buf); + GF_FREE (buf); + goto out; + } + missed_snap_count++; + + /* Setting the new missed_snap_count in the dict */ + ret = dict_set_int32 (rsp_dict, "missed_snap_count", + missed_snap_count); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to set missed_snap_count for %s " + "in the rsp_dict.", missed_snap_entry); + goto out; + } + +out: + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +/* This function is called to get the device path of the snap lvm. Usually + if /dev/mapper/<group-name>-<lvm-name> is the device for the lvm, + then the snap device will be /dev/<group-name>/<snapname>. + This function takes care of building the path for the snap device. +*/ +char * +glusterd_build_snap_device_path (char *device, char *snapname) +{ + char snap[PATH_MAX] = ""; + char msg[1024] = ""; + char volgroup[PATH_MAX] = ""; + char *snap_device = NULL; + xlator_t *this = NULL; + runner_t runner = {0,}; + char *ptr = NULL; + int ret = -1; + + this = THIS; + GF_ASSERT (this); + if (!device) { + gf_log (this->name, GF_LOG_ERROR, "device is NULL"); + goto out; + } + if (!snapname) { + gf_log (this->name, GF_LOG_ERROR, "snapname is NULL"); + goto out; + } + + runinit (&runner); + runner_add_args (&runner, "/sbin/lvs", "--noheadings", "-o", "vg_name", + device, NULL); + runner_redir (&runner, STDOUT_FILENO, RUN_PIPE); + snprintf (msg, sizeof (msg), "Get volume group for device %s", device); + runner_log (&runner, this->name, GF_LOG_DEBUG, msg); + ret = runner_start (&runner); + if (ret == -1) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get volume group " + "for device %s", device); + runner_end (&runner); + goto out; + } + ptr = fgets(volgroup, sizeof(volgroup), + runner_chio (&runner, STDOUT_FILENO)); + if (!ptr || !strlen(volgroup)) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get volume group " + "for snap %s", snapname); + runner_end (&runner); + ret = -1; + goto out; + } + runner_end (&runner); + + snprintf (snap, sizeof(snap), "/dev/%s/%s", gf_trim(volgroup), + snapname); + snap_device = gf_strdup (snap); + if (!snap_device) { + gf_log (this->name, GF_LOG_WARNING, "Cannot copy the " + "snapshot device name for snapname: %s)", snapname); + } + +out: + return snap_device; +} + +/* This function actually calls the command (or the API) for taking the + snapshot of the backend brick filesystem. If this is successful, + then call the glusterd_snap_create function to create the snap object + for glusterd +*/ +char * +glusterd_take_lvm_snapshot (glusterd_volinfo_t *snap_vol, + glusterd_brickinfo_t *brickinfo) +{ + char msg[NAME_MAX] = ""; + char buf[PATH_MAX] = ""; + char *snap_device = NULL; + char *ptr = NULL; + char *device = NULL; + int ret = -1; + gf_boolean_t match = _gf_false; + runner_t runner = {0,}; + xlator_t *this = NULL; + + this = THIS; + + if (!brickinfo) { + gf_log (this->name, GF_LOG_ERROR, "brickinfo NULL"); + goto out; + } + + device = glusterd_get_brick_mount_details (brickinfo); + if (!device) { + gf_log (this->name, GF_LOG_ERROR, "getting device name for " + "the brick %s:%s failed", brickinfo->hostname, + brickinfo->path); + goto out; + } + + /* Figuring out if setactivationskip flag is supported or not */ + runinit (&runner); + snprintf (msg, sizeof (msg), "running lvcreate help"); + runner_add_args (&runner, "/sbin/lvcreate", "--help", NULL); + runner_log (&runner, "", GF_LOG_DEBUG, msg); + runner_redir (&runner, STDOUT_FILENO, RUN_PIPE); + ret = runner_start (&runner); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to run lvcreate help"); + runner_end (&runner); + goto out; + } + + /* Looking for setactivationskip in lvcreate --help */ + do { + ptr = fgets(buf, sizeof(buf), + runner_chio (&runner, STDOUT_FILENO)); + if (ptr) { + if (strstr(buf, "setactivationskip")) { + match = _gf_true; + break; + } + } + } while (ptr != NULL); + runner_end (&runner); + + /* Takng the actual snapshot */ + runinit (&runner); + snprintf (msg, sizeof (msg), "taking snapshot of the brick %s:%s", + brickinfo->hostname, brickinfo->path); + if (match == _gf_true) + runner_add_args (&runner, "/sbin/lvcreate", "-s", device, + "--setactivationskip", "n", "--name", + snap_vol->volname, NULL); + else + runner_add_args (&runner, "/sbin/lvcreate", "-s", device, + "--name", snap_vol->volname, NULL); + runner_log (&runner, "", GF_LOG_DEBUG, msg); + ret = runner_start (&runner); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "taking snapshot of the " + "brick (%s:%s) of device %s failed", + brickinfo->hostname, brickinfo->path, device); + runner_end (&runner); + goto out; + } + runner_end (&runner); + + snap_device = glusterd_build_snap_device_path (device, + snap_vol->volname); + if (!snap_device) { + gf_log (this->name, GF_LOG_WARNING, "Cannot copy the snapshot " + "device name for snap %s (volume id: %s)", + snap_vol->snapshot->snapname, snap_vol->volname); + ret = -1; + goto out; + } + +out: + return snap_device; +} + +int32_t +glusterd_snap_brick_create (char *device, glusterd_volinfo_t *snap_volinfo, + glusterd_brickinfo_t *original_brickinfo, + int32_t brick_count, char *snap_brick_dir) +{ + int32_t ret = -1; + xlator_t *this = NULL; + glusterd_conf_t *priv = NULL; + char snap_brick_mount_path[PATH_MAX] = ""; + char snap_brick_path[PATH_MAX] = ""; + char msg[1024] = ""; + struct stat statbuf = {0, }; + runner_t runner = {0, }; + + this = THIS; + priv = this->private; + + GF_ASSERT (device); + GF_ASSERT (snap_volinfo); + GF_ASSERT (original_brickinfo); + GF_ASSERT (snap_brick_dir); + + snprintf (snap_brick_mount_path, sizeof (snap_brick_mount_path), + "%s/%s/brick%d", snap_mount_folder, snap_volinfo->volname, + brick_count+1); + + snprintf (snap_brick_path, sizeof (snap_brick_path), "%s%s", + snap_brick_mount_path, snap_brick_dir); + + ret = mkdir_p (snap_brick_mount_path, 0777, _gf_true); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "creating the brick directory" + " %s for the snapshot %s(device: %s) failed", + snap_brick_mount_path, snap_volinfo->volname, device); + goto out; + } + /* mount the snap logical device on the directory inside + /run/gluster/snaps/<snapname>/@snap_brick_mount_path + Way to mount the snap brick via mount api is this. + ret = mount (device, snap_brick_mount_path, entry->mnt_type, + MS_MGC_VAL, "nouuid"); + But for now, mounting using runner apis. + */ + runinit (&runner); + snprintf (msg, sizeof (msg), "mounting snapshot of the brick %s:%s", + original_brickinfo->hostname, original_brickinfo->path); + runner_add_args (&runner, "mount", "-o", "nouuid", device, + snap_brick_mount_path, NULL); + runner_log (&runner, "", GF_LOG_DEBUG, msg); + + /* let glusterd get blocked till snapshot is over */ + synclock_unlock (&priv->big_lock); + ret = runner_run (&runner); + synclock_lock (&priv->big_lock); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "mounting the snapshot " + "logical device %s failed (error: %s)", device, + strerror (errno)); + goto out; + } else + gf_log (this->name, GF_LOG_DEBUG, "mounting the snapshot " + "logical device %s successful", device); + + ret = stat (snap_brick_path, &statbuf); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "stat of the brick %s" + "(brick mount: %s) failed (%s)", snap_brick_path, + snap_brick_mount_path, strerror (errno)); + goto out; + } + ret = sys_lsetxattr (snap_brick_path, + GF_XATTR_VOL_ID_KEY, + snap_volinfo->volume_id, 16, + XATTR_REPLACE); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set " + "extended attribute %s on %s. Reason: " + "%s, snap: %s", GF_XATTR_VOL_ID_KEY, + snap_brick_path, strerror (errno), + snap_volinfo->volname); + goto out; + } + +out: + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "unmounting the snap brick" + " mount %s", snap_brick_mount_path); + umount (snap_brick_mount_path); + } + + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +static int32_t +glusterd_add_bricks_to_snap_volume (dict_t *dict, dict_t *rsp_dict, + glusterd_volinfo_t *snap_vol, + glusterd_brickinfo_t *original_brickinfo, + glusterd_brickinfo_t *snap_brickinfo, + char **snap_brick_dir, int64_t volcount, + int32_t brick_count) +{ + char key[PATH_MAX] = ""; + char snap_brick_path[PATH_MAX] = ""; + char *snap_device = NULL; + gf_boolean_t add_missed_snap = _gf_false; + int32_t ret = -1; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (rsp_dict); + GF_ASSERT (snap_vol); + GF_ASSERT (original_brickinfo); + GF_ASSERT (snap_brickinfo); + GF_ASSERT (snap_brick_dir); + + snprintf (key, sizeof(key) - 1, "vol%ld.brickdir%d", volcount, + brick_count); + ret = dict_get_ptr (dict, key, (void **)snap_brick_dir); + if (ret) { + /* Using original brickinfo here because it will be a + * pending snapshot and storing the original brickinfo + * will help in mapping while recreating the missed snapshot + */ + gf_log (this->name, GF_LOG_WARNING, "Unable to fetch " + "snap mount path (%s). Using original brickinfo", key); + snap_brickinfo->snap_status = -1; + strcpy (snap_brick_path, original_brickinfo->path); + + /* In origiator node add snaps missed + * from different nodes to the dict + */ + if (is_origin_glusterd (dict) == _gf_true) + add_missed_snap = _gf_true; + } else { + /* Create brick-path in the format /var/run/gluster/snaps/ * + * <snap-uuid>/<original-brick#>/snap-brick-dir * + */ + snprintf (snap_brick_path, sizeof(snap_brick_path), + "%s/%s/brick%d%s", snap_mount_folder, + snap_vol->volname, brick_count+1, + *snap_brick_dir); + } + + if ((snap_brickinfo->snap_status != -1) && + (!uuid_compare (original_brickinfo->uuid, MY_UUID)) && + (!glusterd_is_brick_started (original_brickinfo))) { + /* In case if the brick goes down after prevalidate. */ + gf_log (this->name, GF_LOG_WARNING, "brick %s:%s is not" + " started (snap: %s)", + original_brickinfo->hostname, + original_brickinfo->path, + snap_vol->snapshot->snapname); + + snap_brickinfo->snap_status = -1; + strcpy (snap_brick_path, original_brickinfo->path); + add_missed_snap = _gf_true; + } + + if (add_missed_snap) { + ret = glusterd_add_missed_snaps_to_dict (rsp_dict, + snap_vol->volname, + original_brickinfo, + brick_count + 1, + GF_SNAP_OPTION_TYPE_CREATE); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to add missed" + " snapshot info for %s:%s in the rsp_dict", + original_brickinfo->hostname, + original_brickinfo->path); + goto out; + } + } + + snprintf (key, sizeof(key), "vol%ld.brick_snapdevice%d", + volcount, brick_count); + ret = dict_get_ptr (dict, key, (void **)&snap_device); + if (ret) { + /* If the device name is empty, so will be the brick path + * Hence the missed snap has already been added above + */ + gf_log (this->name, GF_LOG_ERROR, "Unable to fetch " + "snap device (%s). Leaving empty", key); + } else + strcpy (snap_brickinfo->device_path, snap_device); + + ret = gf_canonicalize_path (snap_brick_path); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to canonicalize path"); + goto out; + } + + strcpy (snap_brickinfo->hostname, original_brickinfo->hostname); + strcpy (snap_brickinfo->path, snap_brick_path); + uuid_copy (snap_brickinfo->uuid, original_brickinfo->uuid); + list_add_tail (&snap_brickinfo->brick_list, &snap_vol->bricks); + +out: + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +static int32_t +glusterd_take_brick_snapshot (glusterd_volinfo_t *origin_vol, + glusterd_volinfo_t *snap_vol, dict_t *rsp_dict, + glusterd_brickinfo_t *original_brickinfo, + glusterd_brickinfo_t *snap_brickinfo, + char *snap_brick_dir, int32_t brick_count) +{ + char *device = NULL; + int32_t ret = -1; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (origin_vol); + GF_ASSERT (snap_vol); + GF_ASSERT (rsp_dict); + GF_ASSERT (original_brickinfo); + GF_ASSERT (snap_brickinfo); + GF_ASSERT (snap_brick_dir); + + device = glusterd_take_lvm_snapshot (snap_vol, original_brickinfo); + /* Fail the snapshot even though snapshot on one of + the bricks fails. At the end when we check whether + the snapshot volume meets quorum or not, then the + the snapshot can either be treated as success, or + in case of failure we can undo the changes and return + failure to cli. */ + if (!device) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to take snapshot of %s:%s", + original_brickinfo->hostname, + original_brickinfo->path); + goto out; + } + + /* create the complete brick here */ + ret = glusterd_snap_brick_create (device, snap_vol, + original_brickinfo, + brick_count, snap_brick_dir); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "not able to" + " create the brickinfo for the snap %s" + ", volume %s", snap_vol->snapshot->snapname, + origin_vol->volname); + goto out; + } + +out: + if (device) + GF_FREE (device); + + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +/* Look for disconnected peers, for missed snap creates or deletes */ +static int32_t +glusterd_find_missed_snap (dict_t *rsp_dict, glusterd_volinfo_t *vol, + char *snap_uuid, struct list_head *peers, + int32_t op) +{ + int32_t brick_count = -1; + int32_t ret = -1; + xlator_t *this = NULL; + glusterd_peerinfo_t *peerinfo = NULL; + glusterd_brickinfo_t *brickinfo = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (rsp_dict); + GF_ASSERT (peers); + GF_ASSERT (vol); + GF_ASSERT (snap_uuid); + + brick_count = 0; + list_for_each_entry (brickinfo, &vol->bricks, brick_list) { + if (!uuid_compare (brickinfo->uuid, MY_UUID)) { + /* If the brick belongs to the same node */ + brick_count++; + continue; + } + + list_for_each_entry (peerinfo, peers, uuid_list) { + if (uuid_compare (peerinfo->uuid, brickinfo->uuid)) { + /* If the brick doesnt belong to this peer */ + continue; + } + + /* Found peer who owns the brick, * + * if peer is not connected or not * + * friend add it to missed snap list */ + if (!(peerinfo->connected) || + (peerinfo->state.state != + GD_FRIEND_STATE_BEFRIENDED)) { + ret = glusterd_add_missed_snaps_to_dict + (rsp_dict, + snap_uuid, + brickinfo, + brick_count + 1, + op); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to add missed snapshot " + "info for %s:%s in the " + "rsp_dict", brickinfo->hostname, + brickinfo->path); + goto out; + } + } + } + brick_count++; + } + + ret = 0; +out: + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +glusterd_volinfo_t * +glusterd_do_snap_vol (glusterd_volinfo_t *origin_vol, glusterd_snap_t *snap, + dict_t *dict, dict_t *rsp_dict, int64_t volcount) +{ + char key[PATH_MAX] = ""; + char *snap_brick_dir = NULL; + char *username = NULL; + char *password = NULL; + glusterd_brickinfo_t *brickinfo = NULL; + glusterd_conf_t *priv = NULL; + glusterd_volinfo_t *snap_vol = NULL; + uuid_t *snap_volid = NULL; + int32_t ret = -1; + int32_t brick_count = 0; + glusterd_brickinfo_t *snap_brickinfo = NULL; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + + priv = this->private; + GF_ASSERT (priv); + GF_ASSERT (dict); + GF_ASSERT (origin_vol); + GF_ASSERT (rsp_dict); + + /* fetch username, password and vol_id from dict*/ + snprintf (key, sizeof(key), "volume%ld_username", volcount); + ret = dict_get_str (dict, key, &username); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get %s for " + "snap %s", key, snap->snapname); + goto out; + } + + snprintf (key, sizeof(key), "volume%ld_password", volcount); + ret = dict_get_str (dict, key, &password); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get %s for " + "snap %s", key, snap->snapname); + goto out; + } + + snprintf (key, sizeof(key) - 1, "vol%ld_volid", volcount); + ret = dict_get_bin (dict, key, (void **)&snap_volid); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Unable to fetch snap_volid"); + goto out; + } + + /* We are not setting the username and password here as + * we need to set the user name and password passed in + * the dictionary + */ + ret = glusterd_volinfo_dup (origin_vol, &snap_vol, _gf_false); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to duplicate volinfo " + "for the snapshot %s", snap->snapname); + goto out; + } + + /* uuid is used as lvm snapshot name. + This will avoid restrictions on snapshot names provided by user */ + GLUSTERD_GET_UUID_NOHYPHEN (snap_vol->volname, *snap_volid); + uuid_copy (snap_vol->volume_id, *snap_volid); + snap_vol->is_snap_volume = _gf_true; + strcpy (snap_vol->parent_volname, origin_vol->volname); + snap_vol->snapshot = snap; + + glusterd_auth_set_username (snap_vol, username); + glusterd_auth_set_password (snap_vol, password); + + /* Adding snap brickinfos to the snap volinfo */ + brick_count = 0; + list_for_each_entry (brickinfo, &origin_vol->bricks, brick_list) { + snap_brickinfo = NULL; + + ret = glusterd_brickinfo_new (&snap_brickinfo); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "initializing the brick for the snap " + "volume failed (snapname: %s)", snap->snapname); + goto out; + } + + ret = glusterd_add_bricks_to_snap_volume (dict, rsp_dict, + snap_vol, + brickinfo, + snap_brickinfo, + &snap_brick_dir, + volcount, + brick_count); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to add the snap brick for " + "%s:%s to the snap volume", + brickinfo->hostname, brickinfo->path); + GF_FREE (snap_brickinfo); + goto out; + } + + /*Update the brickid for the new brick in new volume*/ + GLUSTERD_ASSIGN_BRICKID_TO_BRICKINFO (snap_brickinfo, snap_vol, + brick_count); + + /* Take snapshot of the brick */ + if ((uuid_compare (brickinfo->uuid, MY_UUID)) || + (snap_brickinfo->snap_status == -1)) { + brick_count++; + continue; + } + + ret = glusterd_take_brick_snapshot (origin_vol, snap_vol, + rsp_dict, brickinfo, + snap_brickinfo, + snap_brick_dir, + brick_count); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to take snapshot for %s:%s", + brickinfo->hostname, brickinfo->path); + goto out; + } + brick_count++; + } + + /*TODO: the quorum check of the snap volume here */ + + ret = glusterd_store_volinfo (snap_vol, + GLUSTERD_VOLINFO_VER_AC_INCREMENT); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to store snapshot " + "volinfo (%s) for snap %s", snap_vol->volname, + snap->snapname); + goto out; + } + + ret = generate_brick_volfiles (snap_vol); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "generating the brick " + "volfiles for the snap %s (volume: %s) failed", + snap->snapname, origin_vol->volname); + goto out; + } + + ret = generate_client_volfiles (snap_vol, GF_CLIENT_TRUSTED); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "generating the trusted " + "client volfiles for the snap %s (volume: %s) failed", + snap->snapname, origin_vol->volname); + goto out; + } + + ret = generate_client_volfiles (snap_vol, GF_CLIENT_OTHER); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "generating the client " + "volfiles for the snap %s (volume: %s) failed", + snap->snapname, origin_vol->volname); + goto out; + } + + ret = glusterd_list_add_snapvol (origin_vol, snap_vol); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "could not add the snap " + "volume %s to the list", snap_vol->volname); + goto out; + } + + list_for_each_entry (brickinfo, &snap_vol->bricks, brick_list) { + if (uuid_compare (brickinfo->uuid, MY_UUID)) + continue; + + if (brickinfo->snap_status == -1) { + gf_log (this->name, GF_LOG_INFO, + "not starting snap brick %s:%s for " + "for the snap %s (volume: %s)", + brickinfo->hostname, brickinfo->path, + snap->snapname, origin_vol->volname); + continue; + } + + ret = glusterd_brick_start (snap_vol, brickinfo, _gf_true); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "starting the " + "brick %s:%s for the snap %s (volume: %s) " + "failed", brickinfo->hostname, brickinfo->path, + snap->snapname, origin_vol->volname); + goto out; + } + } + + snap_vol->status = GLUSTERD_STATUS_STARTED; + ret = glusterd_store_volinfo (snap_vol, + GLUSTERD_VOLINFO_VER_AC_INCREMENT); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to store snap volinfo"); + goto out; + } + +out: + if (ret) { + if (snap_vol) + glusterd_snap_volume_remove (rsp_dict, snap_vol, + _gf_true, _gf_true); + snap_vol = NULL; + } + + return snap_vol; +} + +/* This is a snapshot remove handler function. This function will be + * executed in the originator node. This function is responsible for + * calling mgmt v3 framework to do the actual remove on all the bricks + * + * @param req RPC request object + * @param op gluster operation + * @param dict dictionary containing snapshot remove request + * @param err_str In case of an err this string should be populated + * @param len length of err_str buffer + * + * @return Negative value on Failure and 0 in success + */ +int +glusterd_handle_snapshot_remove (rpcsvc_request_t *req, glusterd_op_t op, + dict_t *dict, char *err_str, size_t len) +{ + int ret = -1; + int64_t volcount = 0; + char *snapname = NULL; + char *volname = NULL; + char key[PATH_MAX] = ""; + glusterd_snap_t *snap = NULL; + glusterd_volinfo_t *snap_vol = NULL; + glusterd_volinfo_t *tmp = NULL; + xlator_t *this = NULL; + + this = THIS; + + GF_ASSERT (req); + GF_ASSERT (dict); + GF_ASSERT (err_str); + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get snapname"); + goto out; + } + + snap = glusterd_find_snap_by_name (snapname); + if (!snap) { + snprintf (err_str, len, "Snap (%s) does not exist", snapname); + gf_log (this->name, GF_LOG_ERROR, + "%s", err_str); + ret = -1; + goto out; + } + + /* Set volnames in the dict to get mgmt_v3 lock */ + list_for_each_entry_safe (snap_vol, tmp, &snap->volumes, vol_list) { + volcount++; + volname = gf_strdup (snap_vol->parent_volname); + if (!volname) { + ret = -1; + gf_log (this->name, GF_LOG_ERROR, "strdup failed"); + goto out; + } + + snprintf (key, sizeof (key), "volname%ld", volcount); + ret = dict_set_dynstr (dict, key, volname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set " + "volume name in dictionary"); + GF_FREE (volname); + goto out; + } + volname = NULL; + } + ret = dict_set_int64 (dict, "volcount", volcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set volcount"); + goto out; + } + + ret = glusterd_mgmt_v3_initiate_snap_phases (req, op, dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to initiate snap " + "phases"); + goto out; + } + + ret = 0; +out: + return ret; +} + +int +glusterd_snapshot_remove_prevalidate (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + int32_t ret = -1; + char *snapname = NULL; + xlator_t *this = NULL; + glusterd_snap_t *snap = NULL; + + this = THIS; + + if (!dict || !op_errstr) { + gf_log (this->name, GF_LOG_ERROR, "input parameters NULL"); + goto out; + } + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Getting the snap name " + "failed"); + goto out; + } + + snap = glusterd_find_snap_by_name (snapname); + if (!snap) { + gf_log (this->name, GF_LOG_ERROR, "Snap %s does not exist", + snapname); + ret = -1; + goto out; + } + + ret = 0; +out: + return ret; +} + +int +glusterd_snapshot_status_prevalidate (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + int ret = -1; + char *snapname = NULL; + glusterd_conf_t *conf = NULL; + xlator_t *this = NULL; + int32_t cmd = -1; + glusterd_volinfo_t *volinfo = NULL; + char *volname = NULL; + + this = THIS; + GF_ASSERT (this); + conf = this->private; + + GF_ASSERT (conf); + GF_ASSERT (op_errstr); + if (!dict) { + gf_log (this->name, GF_LOG_ERROR, "Input dict is NULL"); + goto out; + } + + ret = dict_get_int32 (dict, "cmd", &cmd); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not fetch status cmd"); + goto out; + } + + switch (cmd) { + case GF_SNAP_STATUS_TYPE_ALL: + { + break; + } + case GF_SNAP_STATUS_TYPE_SNAP: + { + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not fetch snapname"); + goto out; + } + + if (!glusterd_find_snap_by_name (snapname)) { + ret = gf_asprintf (op_errstr, "Snap (%s) " + "not found", snapname); + if (ret < 0) { + goto out; + } + ret = -1; + gf_log (this->name, GF_LOG_ERROR, "Snap (%s) " + "not found", snapname); + goto out; + } + break; + } + case GF_SNAP_STATUS_TYPE_VOL: + { + ret = dict_get_str (dict, "volname", &volname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not fetch volname"); + goto out; + } + + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + ret = gf_asprintf (op_errstr, "Volume (%s)" + "not found", volname); + if (ret < 0) { + goto out; + } + ret = -1; + gf_log (this->name, GF_LOG_ERROR, "Volume " + "%s not present", volname); + goto out; + } + break; + + } + default: + { + gf_log (this->name, GF_LOG_ERROR, "Invalid command"); + break; + } + } + ret = 0; + +out: + return ret; +} + +int32_t +glusterd_snapshot_remove_commit (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + int32_t ret = -1; + char *snapname = NULL; + char *dup_snapname = NULL; + glusterd_snap_t *snap = NULL; + glusterd_conf_t *priv = NULL; + glusterd_volinfo_t *snap_volinfo = NULL; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (rsp_dict); + GF_ASSERT (op_errstr); + + priv = this->private; + GF_ASSERT (priv); + + if (!dict || !op_errstr) { + gf_log (this->name, GF_LOG_ERROR, "input parameters NULL"); + goto out; + } + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Getting the snap name " + "failed"); + goto out; + } + + snap = glusterd_find_snap_by_name (snapname); + if (!snap) { + gf_log (this->name, GF_LOG_ERROR, "Snap %s does not exist", + snapname); + ret = -1; + goto out; + } + + if (is_origin_glusterd (dict) == _gf_true) { + /* TODO : As of now there is only volume in snapshot. + * Change this when multiple volume snapshot is introduced + */ + snap_volinfo = list_entry (snap->volumes.next, + glusterd_volinfo_t, + vol_list); + if (!snap_volinfo) { + gf_log (this->name, GF_LOG_ERROR, + "Unable to fetch snap_volinfo"); + ret = -1; + goto out; + } + + /* From origin glusterd check if * + * any peers with snap bricks is down */ + ret = glusterd_find_missed_snap (rsp_dict, snap_volinfo, + snap_volinfo->volname, + &priv->peers, + GF_SNAP_OPTION_TYPE_DELETE); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to find missed snap deletes"); + goto out; + } + } + + ret = glusterd_snap_remove (rsp_dict, snap, _gf_true, _gf_false); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to remove snap %s", + snapname); + goto out; + } + + dup_snapname = gf_strdup (snapname); + if (!dup_snapname) { + gf_log (this->name, GF_LOG_ERROR, "Strdup failed"); + ret = -1; + goto out; + } + + ret = dict_set_dynstr (rsp_dict, "snapname", dup_snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to set the snapname"); + GF_FREE (dup_snapname); + goto out; + } + + ret = 0; +out: + return ret; +} + +int32_t +glusterd_do_snap_cleanup (dict_t *dict, char **op_errstr, dict_t *rsp_dict) +{ + int32_t ret = -1; + char *name = NULL; + xlator_t *this = NULL; + glusterd_conf_t *conf = NULL; + glusterd_volinfo_t *volinfo = NULL; + glusterd_snap_t *snap = NULL; + + this = THIS; + GF_ASSERT (this); + conf = this->private; + GF_ASSERT (conf); + + if (!dict || !op_errstr) { + gf_log (this->name, GF_LOG_ERROR, "input parameters NULL"); + goto out; + } + + ret = dict_get_str (dict, "snapname", &name); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "getting the snap " + "name failed (volume: %s)", volinfo->volname); + goto out; + } + + /* + If the snapname is not found that means the failure happened at + staging, or in commit, before the snap object is created, in which + case there is nothing to cleanup. So set ret to 0. + */ + snap = glusterd_find_snap_by_name (name); + if (!snap) { + gf_log (this->name, GF_LOG_INFO, "snap %s is not found", name); + ret = 0; + goto out; + } + + ret = glusterd_snap_remove (rsp_dict, snap, _gf_true, _gf_true); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "removing the snap %s failed", + name); + goto out; + } + + name = NULL; + + ret = 0; + +out: + + return ret; +} + +/* In case of a successful, delete or create operation, during post_validate * + * look for missed snap operations and update the missed snap lists */ +int32_t +glusterd_snapshot_update_snaps_post_validate (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + int32_t ret = -1; + int32_t missed_snap_count = -1; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (rsp_dict); + GF_ASSERT (op_errstr); + + ret = dict_get_int32 (dict, "missed_snap_count", + &missed_snap_count); + if (ret) { + gf_log (this->name, GF_LOG_DEBUG, "No missed snaps"); + ret = 0; + goto out; + } + + ret = glusterd_store_update_missed_snaps (dict, missed_snap_count); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to update missed_snaps_list"); + goto out; + } + +out: + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +int32_t +glusterd_snapshot_create_commit (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + int ret = -1; + int64_t i = 0; + int64_t volcount = 0; + char *snapname = NULL; + char *volname = NULL; + char *tmp_name = NULL; + char key[PATH_MAX] = ""; + xlator_t *this = NULL; + glusterd_snap_t *snap = NULL; + glusterd_volinfo_t *origin_vol = NULL; + glusterd_volinfo_t *snap_vol = NULL; + glusterd_conf_t *priv = NULL; + + this = THIS; + GF_ASSERT(this); + GF_ASSERT(dict); + GF_ASSERT(op_errstr); + GF_ASSERT(rsp_dict); + priv = this->private; + GF_ASSERT(priv); + + ret = dict_get_int64 (dict, "volcount", &volcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "failed to " + "get the volume count"); + goto out; + } + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to fetch snapname"); + goto out; + } + tmp_name = gf_strdup (snapname); + if (!tmp_name) { + gf_log (this->name, GF_LOG_ERROR, "Out of memory"); + ret = -1; + goto out; + } + + ret = dict_set_dynstr (rsp_dict, "snapname", tmp_name); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Unable to set snapname in rsp_dict"); + GF_FREE (tmp_name); + goto out; + } + tmp_name = NULL; + + snap = glusterd_create_snap_object (dict, rsp_dict); + if (!snap) { + gf_log (this->name, GF_LOG_ERROR, "creating the" + "snap object %s failed", snapname); + ret = -1; + goto out; + } + + for (i = 1; i <= volcount; i++) { + snprintf (key, sizeof (key), "volname%ld", i); + ret = dict_get_str (dict, key, &volname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "failed to get volume name"); + goto out; + } + + ret = glusterd_volinfo_find (volname, &origin_vol); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "failed to get the volinfo for " + "the volume %s", volname); + goto out; + } + + /* TODO: Create a stub where the bricks are + added parallely by worker threads so that + the snap creating happens parallely. */ + snap_vol = glusterd_do_snap_vol (origin_vol, snap, dict, + rsp_dict, i); + if (!snap_vol) { + ret = -1; + gf_log (this->name, GF_LOG_WARNING, "taking the " + "snapshot of the volume %s failed", volname); + goto out; + } + } + + snap->snap_status = GD_SNAP_STATUS_IN_USE; + ret = glusterd_store_snap (snap); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Could not store snap" + "object %s", snap->snapname); + goto out; + } + + ret = 0; + +out: + if (ret) { + if (snap) + glusterd_snap_remove (rsp_dict, snap, + _gf_true, _gf_true); + snap = NULL; + } + + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +int +snap_max_hard_limit_set_commit (dict_t *dict, uint64_t value, + char *volname, char **op_errstr) +{ + char err_str[PATH_MAX] = ""; + glusterd_conf_t *conf = NULL; + glusterd_volinfo_t *volinfo = NULL; + int ret = -1; + xlator_t *this = NULL; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (volname); + GF_ASSERT (op_errstr); + + conf = this->private; + + GF_ASSERT (conf); + + /* TODO: Initiate auto deletion when there is a limit change */ + if (!volname) { + /* For system limit */ + conf->snap_max_hard_limit = value; + + ret = glusterd_store_global_info (this); + if (ret) { + snprintf (err_str, PATH_MAX, "Failed to store " + "snap-max-hard-limit for system"); + goto out; + } + } else { + /* For one volume */ + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + snprintf (err_str, PATH_MAX, "Failed to get the" + " volinfo for volume %s", volname); + goto out; + } + + volinfo->snap_max_hard_limit = value; + + ret = glusterd_store_volinfo (volinfo, + GLUSTERD_VOLINFO_VER_AC_INCREMENT); + if (ret) { + snprintf (err_str, PATH_MAX, "Failed to store " + "snap-max-hard-limit for volume %s", volname); + goto out; + } + } + + ret = 0; +out: + if (ret) { + *op_errstr = gf_strdup (err_str); + gf_log (this->name, GF_LOG_ERROR, "%s", err_str); + } + return ret; +} + +int +snap_max_limits_display_commit (dict_t *rsp_dict, char *volname, + char **op_errstr) +{ + char err_str[PATH_MAX] = ""; + char buf[PATH_MAX] = ""; + glusterd_conf_t *conf = NULL; + glusterd_volinfo_t *volinfo = NULL; + int ret = -1; + uint64_t active_hard_limit = 0; + uint64_t snap_max_limit = 0; + uint64_t soft_limit_value = -1; + uint64_t count = 0; + xlator_t *this = NULL; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (rsp_dict); + GF_ASSERT (volname); + GF_ASSERT (op_errstr); + + conf = this->private; + + GF_ASSERT (conf); + + if (!volname) { + /* For system limit */ + list_for_each_entry (volinfo, &conf->volumes, vol_list) { + if (volinfo->is_snap_volume == _gf_true) + continue; + snap_max_limit = volinfo->snap_max_hard_limit; + if (snap_max_limit > conf->snap_max_hard_limit) + active_hard_limit = conf->snap_max_hard_limit; + else + active_hard_limit = snap_max_limit; + soft_limit_value = (active_hard_limit * + conf->snap_max_soft_limit) / 100; + + snprintf (buf, sizeof(buf), "volume%ld-volname", count); + ret = dict_set_str (rsp_dict, buf, volinfo->volname); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set %s", buf); + goto out; + } + + snprintf (buf, sizeof(buf), + "volume%ld-snap-max-hard-limit", count); + ret = dict_set_uint64 (rsp_dict, buf, snap_max_limit); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set %s", buf); + goto out; + } + + snprintf (buf, sizeof(buf), + "volume%ld-active-hard-limit", count); + ret = dict_set_uint64 (rsp_dict, buf, + active_hard_limit); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set %s", buf); + goto out; + } + + snprintf (buf, sizeof(buf), + "volume%ld-snap-max-soft-limit", count); + ret = dict_set_uint64 (rsp_dict, buf, soft_limit_value); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set %s", buf); + goto out; + } + count++; + } + + ret = dict_set_uint64 (rsp_dict, "voldisplaycount", count); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set voldisplaycount"); + goto out; + } + } else { + /* For one volume */ + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + snprintf (err_str, PATH_MAX, "Failed to get the" + " volinfo for volume %s", volname); + goto out; + } + + snap_max_limit = volinfo->snap_max_hard_limit; + if (snap_max_limit > conf->snap_max_hard_limit) + active_hard_limit = conf->snap_max_hard_limit; + else + active_hard_limit = snap_max_limit; + + soft_limit_value = (active_hard_limit * + conf->snap_max_soft_limit) / 100; + + snprintf (buf, sizeof(buf), "volume%ld-volname", count); + ret = dict_set_str (rsp_dict, buf, volinfo->volname); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set %s", buf); + goto out; + } + + snprintf (buf, sizeof(buf), + "volume%ld-snap-max-hard-limit", count); + ret = dict_set_uint64 (rsp_dict, buf, snap_max_limit); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set %s", buf); + goto out; + } + + snprintf (buf, sizeof(buf), + "volume%ld-active-hard-limit", count); + ret = dict_set_uint64 (rsp_dict, buf, active_hard_limit); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set %s", buf); + goto out; + } + + snprintf (buf, sizeof(buf), + "volume%ld-snap-max-soft-limit", count); + ret = dict_set_uint64 (rsp_dict, buf, soft_limit_value); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set %s", buf); + goto out; + } + + count++; + + ret = dict_set_uint64 (rsp_dict, "voldisplaycount", count); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set voldisplaycount"); + goto out; + } + + } + + ret = dict_set_uint64 (rsp_dict, "snap-max-hard-limit", + conf->snap_max_hard_limit); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set sys-snap-max-hard-limit "); + goto out; + } + + ret = dict_set_uint64 (rsp_dict, "snap-max-soft-limit", + conf->snap_max_soft_limit); + if (ret) { + snprintf (err_str, PATH_MAX, + "Failed to set sys-snap-max-hard-limit "); + goto out; + } + + ret = 0; +out: + if (ret) { + *op_errstr = gf_strdup (err_str); + gf_log (this->name, GF_LOG_ERROR, "%s", err_str); + } + return ret; +} + +int +glusterd_snapshot_config_commit (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + char *volname = NULL; + xlator_t *this = NULL; + int ret = -1; + char err_str[PATH_MAX] = {0,}; + glusterd_conf_t *conf = NULL; + int config_command = 0; + uint64_t hard_limit = 0; + uint64_t soft_limit = 0; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (op_errstr); + + conf = this->private; + + GF_ASSERT (conf); + + ret = dict_get_int32 (dict, "config-command", &config_command); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "failed to get config-command type"); + goto out; + } + + /* Ignore the return value of the following dict_get, + * as they are optional + */ + ret = dict_get_str (dict, "volname", &volname); + + ret = dict_get_uint64 (dict, "snap-max-hard-limit", &hard_limit); + + ret = dict_get_uint64 (dict, "snap-max-soft-limit", &soft_limit); + + switch (config_command) { + case GF_SNAP_CONFIG_TYPE_SET: + if (hard_limit) { + /* Commit ops for snap-max-hard-limit */ + ret = snap_max_hard_limit_set_commit (dict, hard_limit, + volname, + op_errstr); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "snap-max-hard-limit set " + "commit failed."); + goto out; + } + } + + if (soft_limit) { + /* For system limit */ + conf->snap_max_soft_limit = soft_limit; + + ret = glusterd_store_global_info (this); + if (ret) { + snprintf (err_str, PATH_MAX, "Failed to store " + "snap-max-soft-limit for system"); + *op_errstr = gf_strdup (err_str); + gf_log (this->name, GF_LOG_ERROR, "%s", + err_str); + goto out; + } + } + break; + + case GF_SNAP_CONFIG_DISPLAY: + /* Reading data from local node only */ + if (!is_origin_glusterd (dict)) { + ret = 0; + break; + } + + ret = snap_max_limits_display_commit (rsp_dict, volname, + op_errstr); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "snap-max-limit " + "display commit failed."); + goto out; + } + break; + default: + break; + } + +out: + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +int +glusterd_get_brick_lvm_details (dict_t *rsp_dict, + glusterd_brickinfo_t *brickinfo, char *volname, + char *device, char *key_prefix) +{ + + int ret = -1; + glusterd_conf_t *priv = NULL; + runner_t runner = {0,}; + xlator_t *this = NULL; + char msg[PATH_MAX] = ""; + char buf[PATH_MAX] = ""; + char *ptr = NULL; + char *token = NULL; + char key[PATH_MAX] = ""; + char *value = NULL; + + GF_ASSERT (rsp_dict); + GF_ASSERT (brickinfo); + GF_ASSERT (volname); + this = THIS; + GF_ASSERT (this); + priv = this->private; + GF_ASSERT (priv); + + device = glusterd_get_brick_mount_details (brickinfo); + if (!device) { + gf_log (this->name, GF_LOG_ERROR, "Getting device name for " + "the brick %s:%s failed", brickinfo->hostname, + brickinfo->path); + goto out; + } + runinit (&runner); + snprintf (msg, sizeof (msg), "running lvs command, " + "for getting snap status"); + /* Using lvs command fetch the Volume Group name, + * Percentage of data filled and Logical Volume size + * + * "-o" argument is used to get the desired information, + * example : "lvs /dev/VolGroup/thin_vol -o vgname,lv_size", + * will get us Volume Group name and Logical Volume size. + * + * Here separator used is ":", + * for the above given command with separator ":", + * The output will be "vgname:lvsize" + */ + runner_add_args (&runner, "lvs", device, "--noheading", "-o", + "vg_name,data_percent,lv_size", + "--separator", ":", NULL); + runner_redir (&runner, STDOUT_FILENO, RUN_PIPE); + runner_log (&runner, "", GF_LOG_DEBUG, msg); + ret = runner_start (&runner); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not perform lvs action"); + goto end; + } + do { + ptr = fgets (buf, sizeof (buf), + runner_chio (&runner, STDOUT_FILENO)); + + if (ptr == NULL) + break; + token = strtok (buf, ":"); + if (token != NULL) { + while (token && token[0] == ' ') + token++; + if (!token) { + ret = -1; + gf_log (this->name, GF_LOG_ERROR, + "Invalid vg entry"); + goto end; + } + value = gf_strdup (token); + if (!value) { + ret = -1; + goto end; + } + ret = snprintf (key, sizeof (key), "%s.vgname", + key_prefix); + if (ret < 0) { + goto end; + } + + ret = dict_set_dynstr (rsp_dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save vgname "); + goto end; + } + } + + token = strtok (NULL, ":"); + if (token != NULL) { + value = gf_strdup (token); + if (!value) { + ret = -1; + goto end; + } + ret = snprintf (key, sizeof (key), "%s.data", + key_prefix); + if (ret < 0) { + goto end; + } + + ret = dict_set_dynstr (rsp_dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save data percent "); + goto end; + } + } + token = strtok (NULL, ":"); + if (token != NULL) { + value = gf_strdup (token); + if (!value) { + ret = -1; + goto end; + } + ret = snprintf (key, sizeof (key), "%s.lvsize", + key_prefix); + if (ret < 0) { + goto end; + } + + ret = dict_set_dynstr (rsp_dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save meta data percent "); + goto end; + } + } + + } while (ptr != NULL); + + ret = 0; + +end: + runner_end (&runner); + +out: + if (ret && value) { + GF_FREE (value); + } + + return ret; +} + +int +glusterd_get_single_brick_status (char **op_errstr, dict_t *rsp_dict, + char *keyprefix, int index, + glusterd_volinfo_t *snap_volinfo, + glusterd_brickinfo_t *brickinfo) +{ + int ret = -1; + xlator_t *this = NULL; + glusterd_conf_t *priv = NULL; + char key[PATH_MAX] = ""; + char *device = NULL; + char *value = NULL; + char brick_path[PATH_MAX] = ""; + char pidfile[PATH_MAX] = ""; + pid_t pid = -1; + + this = THIS; + GF_ASSERT (this); + priv = this->private; + GF_ASSERT (priv); + + GF_ASSERT (op_errstr); + GF_ASSERT (rsp_dict); + GF_ASSERT (keyprefix); + GF_ASSERT (snap_volinfo); + GF_ASSERT (brickinfo); + + ret = snprintf (key, sizeof (key), "%s.brick%d.path", keyprefix, + index); + if (ret < 0) { + goto out; + } + + ret = snprintf (brick_path, sizeof (brick_path), + "%s:%s", brickinfo->hostname, brickinfo->path); + if (ret < 0) { + goto out; + } + + value = gf_strdup (brick_path); + if (!value) { + ret = -1; + goto out; + } + + ret = dict_set_dynstr (rsp_dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to store " + "brick_path %s", brickinfo->path); + goto out; + } + + if (brickinfo->snap_status == -1) { + /* Setting vgname as "Pending Snapshot" */ + value = gf_strdup ("Pending Snapshot"); + if (!value) { + ret = -1; + goto out; + } + + snprintf (key, sizeof (key), "%s.brick%d.vgname", + keyprefix, index); + ret = dict_set_dynstr (rsp_dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save vgname "); + goto out; + } + + ret = 0; + goto out; + } + value = NULL; + + ret = snprintf (key, sizeof (key), "%s.brick%d.status", + keyprefix, index); + if (ret < 0) { + goto out; + } + + if (brickinfo->status == GF_BRICK_STOPPED) { + value = gf_strdup ("No"); + if (!value) { + ret = -1; + goto out; + } + ret = dict_set_str (rsp_dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save brick status"); + goto out; + } + value = NULL; + } else { + value = gf_strdup ("Yes"); + if (!value) { + ret = -1; + goto out; + } + ret = dict_set_str (rsp_dict, key, value); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save brick status"); + goto out; + } + value = NULL; + + GLUSTERD_GET_BRICK_PIDFILE (pidfile, snap_volinfo, + brickinfo, priv); + ret = gf_is_service_running (pidfile, &pid); + + ret = snprintf (key, sizeof (key), "%s.brick%d.pid", + keyprefix, index); + if (ret < 0) { + goto out; + } + + ret = dict_set_int32 (rsp_dict, key, pid); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save pid %d", pid); + goto out; + } + } + + ret = snprintf (key, sizeof (key), "%s.brick%d", + keyprefix, index); + if (ret < 0) { + goto out; + } + + ret = glusterd_get_brick_lvm_details (rsp_dict, brickinfo, + snap_volinfo->volname, + device, key); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get " + "brick LVM details"); + goto out; + } +out: + if (ret && value) { + GF_FREE (value); + } + + return ret; +} + +int +glusterd_get_single_snap_status (char **op_errstr, dict_t *rsp_dict, + char *keyprefix, glusterd_snap_t *snap) +{ + int ret = -1; + xlator_t *this = NULL; + char key[PATH_MAX] = ""; + char brickkey[PATH_MAX] = ""; + glusterd_volinfo_t *snap_volinfo = NULL; + glusterd_volinfo_t *tmp_volinfo = NULL; + glusterd_brickinfo_t *brickinfo = NULL; + int volcount = 0; + int brickcount = 0; + + this = THIS; + GF_ASSERT (this); + + GF_ASSERT (op_errstr); + GF_ASSERT (rsp_dict); + GF_ASSERT (keyprefix); + GF_ASSERT (snap); + + list_for_each_entry_safe (snap_volinfo, tmp_volinfo, &snap->volumes, + vol_list) { + ret = snprintf (key, sizeof (key), "%s.vol%d", keyprefix, + volcount); + if (ret < 0) { + goto out; + } + list_for_each_entry (brickinfo, &snap_volinfo->bricks, + brick_list) { + if (!glusterd_is_local_brick (this, snap_volinfo, + brickinfo)) { + brickcount++; + continue; + } + + ret = glusterd_get_single_brick_status (op_errstr, + rsp_dict, key, brickcount, + snap_volinfo, brickinfo); + + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Getting " + "single snap status failed"); + goto out; + } + brickcount++; + } + ret = snprintf (brickkey, sizeof (brickkey), "%s.brickcount", + key); + if (ret < 0) { + goto out; + } + + ret = dict_set_int32 (rsp_dict, brickkey, brickcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save brick count"); + goto out; + } + volcount++; + } + + ret = snprintf (key, sizeof (key), "%s.volcount", keyprefix); + if (ret < 0) { + goto out; + } + + ret = dict_set_int32 (rsp_dict, key, volcount); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save volcount"); + goto out; + } + +out: + + return ret; +} + +int +glusterd_get_each_snap_object_status (char **op_errstr, dict_t *rsp_dict, + glusterd_snap_t *snap, char *keyprefix) +{ + int ret = -1; + char key[PATH_MAX] = ""; + char *temp = NULL; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + GF_ASSERT (op_errstr); + GF_ASSERT (rsp_dict); + GF_ASSERT (snap); + GF_ASSERT (keyprefix); + + /* TODO : Get all the snap volume info present in snap object, + * as of now, There will be only one snapvolinfo per snap object + */ + ret = snprintf (key, sizeof (key), "%s.snapname", keyprefix); + if (ret < 0) { + goto out; + } + + temp = gf_strdup (snap->snapname); + if (temp == NULL) { + ret = -1; + goto out; + } + ret = dict_set_dynstr (rsp_dict, key, temp); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not save " + "snap name"); + goto out; + } + + temp = NULL; + + ret = snprintf (key, sizeof (key), "%s.uuid", keyprefix); + if (ret < 0) { + goto out; + } + + temp = gf_strdup (uuid_utoa (snap->snap_id)); + if (temp == NULL) { + ret = -1; + goto out; + } + + ret = dict_set_dynstr (rsp_dict, key, temp); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not save " + "snap UUID"); + goto out; + } + + temp = NULL; + + ret = glusterd_get_single_snap_status (op_errstr, rsp_dict, keyprefix, + snap); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not get single snap status"); + goto out; + } + + ret = snprintf (key, sizeof (key), "%s.volcount", keyprefix); + if (ret < 0) { + goto out; + } + + ret = dict_set_int32 (rsp_dict, key, 1); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not save volcount"); + goto out; + } +out: + if (ret && temp) + GF_FREE (temp); + + return ret; +} + +int +glusterd_get_snap_status_of_volume (char **op_errstr, dict_t *rsp_dict, + char *volname, char *keyprefix) { + int ret = -1; + glusterd_volinfo_t *snap_volinfo = NULL; + glusterd_volinfo_t *temp_volinfo = NULL; + glusterd_volinfo_t *volinfo = NULL; + char key[PATH_MAX] = ""; + xlator_t *this = NULL; + glusterd_conf_t *priv = NULL; + int i = 0; + + this = THIS; + GF_ASSERT (this); + priv = this->private; + GF_ASSERT (priv); + + GF_ASSERT (op_errstr); + GF_ASSERT (rsp_dict); + GF_ASSERT (volname); + GF_ASSERT (keyprefix); + + ret = glusterd_volinfo_find (volname, &volinfo); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to get volinfo of " + "volume %s", volname); + goto out; + } + + list_for_each_entry_safe (snap_volinfo, temp_volinfo, + &volinfo->snap_volumes, snapvol_list) { + ret = snprintf (key, sizeof (key), "status.snap%d", i); + if (ret < 0) { + goto out; + } + + ret = glusterd_get_each_snap_object_status (op_errstr, + rsp_dict, snap_volinfo->snapshot, key); + + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Function : " + "glusterd_get_single_snap_status failed"); + goto out; + } + i++; + } + + ret = dict_set_int32 (rsp_dict, "status.snapcount", i); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to save snapcount"); + ret = -1; + goto out; + } +out: + return ret; +} + +int +glusterd_get_all_snapshot_status (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + int32_t i = 0; + int ret = -1; + char key[PATH_MAX] = ""; + glusterd_conf_t *priv = NULL; + glusterd_snap_t *snap = NULL; + glusterd_snap_t *tmp_snap = NULL; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT (this); + priv = this->private; + GF_ASSERT (priv); + + GF_ASSERT (dict); + GF_ASSERT (op_errstr); + + list_for_each_entry_safe (snap, tmp_snap, + &priv->snapshots, snap_list) { + ret = snprintf (key, sizeof (key), "status.snap%d", i); + if (ret < 0) { + goto out; + } + + ret = glusterd_get_each_snap_object_status (op_errstr, + rsp_dict, snap, key); + + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not get " + "the details of a snap object: %s", + snap->snapname); + goto out; + } + i++; + } + + ret = dict_set_int32 (rsp_dict, "status.snapcount", i); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Could not save snapcount"); + goto out; + } + + ret = 0; +out: + return ret; +} + + +int +glusterd_snapshot_status_commit (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + xlator_t *this = NULL; + int ret = -1; + glusterd_conf_t *conf = NULL; + char *get_buffer = NULL; + int32_t cmd = -1; + char *snapname = NULL; + glusterd_snap_t *snap = NULL; + char *volname = NULL; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (op_errstr); + + conf = this->private; + + GF_ASSERT (conf); + ret = dict_get_int32 (dict, "cmd", &cmd); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to get status cmd type"); + goto out; + } + + ret = dict_set_int32 (rsp_dict, "cmd", cmd); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Could not save status cmd in rsp dictionary"); + goto out; + } + switch (cmd) { + case GF_SNAP_STATUS_TYPE_ALL: + { + ret = glusterd_get_all_snapshot_status (dict, op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to " + "get snapshot status"); + goto out; + } + break; + } + case GF_SNAP_STATUS_TYPE_SNAP: + { + + ret = dict_get_str (dict, "snapname", &snapname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to " + "get snap name"); + goto out; + } + + snap = glusterd_find_snap_by_name (snapname); + if (!snap) { + ret = gf_asprintf (op_errstr, "Snap (%s) " + "not found", snapname); + if (ret < 0) { + goto out; + } + ret = -1; + gf_log (this->name, GF_LOG_ERROR, "Unable to " + "get snap volinfo"); + goto out; + } + ret = glusterd_get_each_snap_object_status (op_errstr, + rsp_dict, snap, "status.snap0"); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to " + "get status of snap %s", get_buffer); + goto out; + } + break; + } + case GF_SNAP_STATUS_TYPE_VOL: + { + ret = dict_get_str (dict, "volname", &volname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Unable to" + " get volume name"); + goto out; + } + + ret = glusterd_get_snap_status_of_volume (op_errstr, + rsp_dict, volname, "status.vol0"); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Function :" + " glusterd_get_snap_status_of_volume " + "failed"); + goto out; + } + } + } + ret = 0; +out: + return ret; +} + +int32_t +glusterd_snapshot_create_postvalidate (dict_t *dict, int32_t op_ret, + char **op_errstr, dict_t *rsp_dict) +{ + xlator_t *this = NULL; + glusterd_conf_t *priv = NULL; + int ret = -1; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (rsp_dict); + + priv = this->private; + GF_ASSERT (priv); + + if (op_ret) { + ret = glusterd_do_snap_cleanup (dict, op_errstr, rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "cleanup operation " + "failed"); + goto out; + } + } else { + ret = glusterd_snapshot_update_snaps_post_validate (dict, + op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "create snapshot"); + goto out; + } + } + + ret = 0; +out: + return ret; +} + +int32_t +glusterd_snapshot (dict_t *dict, char **op_errstr, dict_t *rsp_dict) +{ + + xlator_t *this = NULL; + glusterd_conf_t *priv = NULL; + int32_t snap_command = 0; + int ret = -1; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (rsp_dict); + + priv = this->private; + GF_ASSERT (priv); + + ret = dict_get_int32 (dict, "type", &snap_command); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "unable to get the type of " + "the snapshot command"); + goto out; + } + + switch (snap_command) { + case (GF_SNAP_OPTION_TYPE_CREATE): + ret = glusterd_snapshot_create_commit (dict, op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "create snapshot"); + goto out; + } + break; + + case GF_SNAP_OPTION_TYPE_CONFIG: + ret = glusterd_snapshot_config_commit (dict, op_errstr, + rsp_dict); + break; + + case GF_SNAP_OPTION_TYPE_DELETE: + ret = glusterd_snapshot_remove_commit (dict, op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "delete snapshot"); + goto out; + } + break; + + case GF_SNAP_OPTION_TYPE_RESTORE: + ret = glusterd_snapshot_restore (dict, op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Failed to " + "restore snapshot"); + goto out; + } + + break; + + case GF_SNAP_OPTION_TYPE_STATUS: + ret = glusterd_snapshot_status_commit (dict, op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "show snapshot status"); + goto out; + } + break; + + + default: + gf_log (this->name, GF_LOG_WARNING, "invalid snap command"); + goto out; + break; + } + + ret = 0; + +out: + return ret; +} + +int +glusterd_snapshot_brickop (dict_t *dict, char **op_errstr, dict_t *rsp_dict) +{ + int ret = -1; + int64_t vol_count = 0; + int64_t count = 1; + char key[1024] = {0,}; + char *volname = NULL; + int32_t snap_command = 0; + xlator_t *this = NULL; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (rsp_dict); + + ret = dict_get_int32 (dict, "type", &snap_command); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "unable to get the type of " + "the snapshot command"); + goto out; + } + + switch (snap_command) { + case GF_SNAP_OPTION_TYPE_CREATE: + ret = dict_get_int64 (dict, "volcount", &vol_count); + if (ret) + goto out; + while (count <= vol_count) { + snprintf (key, 1024, "volname%"PRId64, count); + ret = dict_get_str (dict, key, &volname); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Unable to get volname"); + goto out; + } + ret = dict_set_str (dict, "volname", volname); + if (ret) + goto out; + + ret = gd_brick_op_phase (GD_OP_SNAP, NULL, dict, + op_errstr); + if (ret) + goto out; + volname = NULL; + count++; + } + + dict_del (dict, "volname"); + ret = 0; + break; + case GF_SNAP_OPTION_TYPE_DELETE: + break; + default: + break; + } + +out: + return ret; +} + +int +glusterd_snapshot_prevalidate (dict_t *dict, char **op_errstr, + dict_t *rsp_dict) +{ + int snap_command = 0; + xlator_t *this = NULL; + int ret = -1; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (rsp_dict); + + ret = dict_get_int32 (dict, "type", &snap_command); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "unable to get the type of " + "the snapshot command"); + goto out; + } + + switch (snap_command) { + case (GF_SNAP_OPTION_TYPE_CREATE): + ret = glusterd_snapshot_create_prevalidate (dict, op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot create " + "pre-validation failed"); + goto out; + } + break; + + case (GF_SNAP_OPTION_TYPE_CONFIG): + ret = glusterd_snapshot_config_prevalidate (dict, op_errstr); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot config " + "pre-validation failed"); + goto out; + } + break; + + case GF_SNAP_OPTION_TYPE_RESTORE: + ret = glusterd_snapshot_restore_prevalidate (dict, op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot restore " + "validation failed"); + goto out; + } + break; + case GF_SNAP_OPTION_TYPE_DELETE: + ret = glusterd_snapshot_remove_prevalidate (dict, op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot remove " + "validation failed"); + goto out; + } + break; + + case GF_SNAP_OPTION_TYPE_STATUS: + ret = glusterd_snapshot_status_prevalidate (dict, op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot status " + "validation failed"); + goto out; + } + break; + + default: + gf_log (this->name, GF_LOG_WARNING, "invalid snap command"); + goto out; + } + + ret = 0; +out: + return ret; +} + +int +glusterd_snapshot_postvalidate (dict_t *dict, int32_t op_ret, char **op_errstr, + dict_t *rsp_dict) +{ + int snap_command = 0; + xlator_t *this = NULL; + int ret = -1; + + this = THIS; + + GF_ASSERT (this); + GF_ASSERT (dict); + GF_ASSERT (rsp_dict); + + ret = dict_get_int32 (dict, "type", &snap_command); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "unable to get the type of " + "the snapshot command"); + goto out; + } + + switch (snap_command) { + case GF_SNAP_OPTION_TYPE_CREATE: + ret = glusterd_snapshot_create_postvalidate (dict, op_ret, + op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot create " + "post-validation failed"); + goto out; + } + break; + + case GF_SNAP_OPTION_TYPE_DELETE: + case GF_SNAP_OPTION_TYPE_RESTORE: + ret = glusterd_snapshot_update_snaps_post_validate (dict, + op_errstr, + rsp_dict); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Failed to " + "update missed snaps list"); + goto out; + } + break; + + default: + gf_log (this->name, GF_LOG_WARNING, "invalid snap command"); + goto out; + } + + ret = 0; +out: + return ret; +} + +int +glusterd_handle_snapshot_fn (rpcsvc_request_t *req) +{ + int32_t ret = 0; + dict_t *dict = NULL; + gf_cli_req cli_req = {{0},}; + glusterd_op_t cli_op = GD_OP_SNAP; + int type = 0; + glusterd_conf_t *conf = NULL; + char *host_uuid = NULL; + char err_str[2048] = {0,}; + xlator_t *this = NULL; + char *volname = NULL; + + GF_ASSERT (req); + + this = THIS; + GF_ASSERT (this); + conf = this->private; + GF_ASSERT (conf); + + ret = xdr_to_generic (req->msg[0], &cli_req, + (xdrproc_t)xdr_gf_cli_req); + if (ret < 0) { + req->rpc_err = GARBAGE_ARGS; + goto out; + } + + if (cli_req.dict.dict_len > 0) { + dict = dict_new (); + if (!dict) + goto out; + + ret = dict_unserialize (cli_req.dict.dict_val, + cli_req.dict.dict_len, + &dict); + if (ret < 0) { + gf_log (this->name, GF_LOG_ERROR, "failed to " + "unserialize req-buffer to dictionary"); + snprintf (err_str, sizeof (err_str), "Unable to decode " + "the command"); + goto out; + } + + dict->extra_stdfree = cli_req.dict.dict_val; + + host_uuid = gf_strdup (uuid_utoa(MY_UUID)); + if (host_uuid == NULL) { + snprintf (err_str, sizeof (err_str), "Failed to get " + "the uuid of local glusterd"); + ret = -1; + goto out; + } + ret = dict_set_dynstr (dict, "host-uuid", host_uuid); + if (ret) { + GF_FREE (host_uuid); + goto out; + } + + + } else { + gf_log (this->name, GF_LOG_ERROR, "request dict length is %d", + cli_req.dict.dict_len); + goto out; + } + + ret = dict_get_int32 (dict, "type", &type); + if (ret < 0) { + snprintf (err_str, sizeof (err_str), "Command type not found"); + gf_log (this->name, GF_LOG_ERROR, "%s", err_str); + goto out; + } + + switch (type) { + case GF_SNAP_OPTION_TYPE_CREATE: + ret = glusterd_handle_snapshot_create (req, cli_op, dict, + err_str, sizeof (err_str)); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot create " + "failed: %s", err_str); + } + break; + case GF_SNAP_OPTION_TYPE_RESTORE: + ret = glusterd_handle_snapshot_restore (req, cli_op, dict, + err_str, sizeof (err_str)); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot restore " + "failed: %s", err_str); + } + + break; + case GF_SNAP_OPTION_TYPE_INFO: + ret = glusterd_handle_snapshot_info (req, cli_op, dict, + err_str, sizeof (err_str)); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot info " + "failed"); + } + break; + case GF_SNAP_OPTION_TYPE_LIST: + ret = glusterd_handle_snapshot_list (req, cli_op, dict, + err_str, sizeof (err_str)); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot list " + "failed"); + } + break; + case GF_SNAP_OPTION_TYPE_CONFIG: + /* TODO : Type of lock to be taken when we are setting + * limits system wide + */ + ret = dict_get_str (dict, "volname", &volname); + if (!volname) { + ret = dict_set_int32 (dict, "hold_vol_locks", + _gf_false); + if (ret) { + gf_log ("cli", GF_LOG_ERROR, + "Unable to set hold_vol_locks value " + "as _gf_false"); + goto out; + } + + } + ret = glusterd_mgmt_v3_initiate_all_phases (req, cli_op, dict); + break; + case GF_SNAP_OPTION_TYPE_DELETE: + ret = glusterd_handle_snapshot_remove (req, cli_op, dict, + err_str, + sizeof (err_str)); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot delete " + "failed: %s", err_str); + } + break; + case GF_SNAP_OPTION_TYPE_START: + case GF_SNAP_OPTION_TYPE_STOP: + case GF_SNAP_OPTION_TYPE_STATUS: + ret = glusterd_handle_snapshot_status (req, cli_op, dict, + err_str, + sizeof (err_str)); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, "Snapshot status " + "failed: %s", err_str); + } + break; + default: + gf_log (this->name, GF_LOG_ERROR, "Unkown snapshot request " + "type (%d)", type); + ret = -1; /* Failure */ + } + +out: + if (ret) { + if (err_str[0] == '\0') + snprintf (err_str, sizeof (err_str), + "Operation failed"); + ret = glusterd_op_send_cli_response (cli_op, ret, 0, req, + dict, err_str); + } + + return ret; +} + +int +glusterd_handle_snapshot (rpcsvc_request_t *req) +{ + return glusterd_big_locked_handler (req, glusterd_handle_snapshot_fn); +} + +static inline void +glusterd_free_snap_op (glusterd_snap_op_t *snap_op) +{ + if (snap_op) { + if (snap_op->brick_path) + GF_FREE (snap_op->brick_path); + + GF_FREE (snap_op); + } +} + +/* Look for duplicates and accordingly update the list */ +int32_t +glusterd_update_missed_snap_entry (glusterd_missed_snap_info *missed_snapinfo, + glusterd_snap_op_t *missed_snap_op) +{ + int32_t ret = -1; + glusterd_snap_op_t *snap_opinfo = NULL; + gf_boolean_t match = _gf_false; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT(this); + GF_ASSERT(missed_snapinfo); + GF_ASSERT(missed_snap_op); + + list_for_each_entry (snap_opinfo, &missed_snapinfo->snap_ops, + snap_ops_list) { + if ((!strcmp (snap_opinfo->brick_path, + missed_snap_op->brick_path)) && + (snap_opinfo->op == missed_snap_op->op)) { + /* If two entries have conflicting status + * GD_MISSED_SNAP_DONE takes precedence + */ + if ((snap_opinfo->status == GD_MISSED_SNAP_PENDING) && + (missed_snap_op->status == GD_MISSED_SNAP_DONE)) { + snap_opinfo->status = GD_MISSED_SNAP_DONE; + gf_log (this->name, GF_LOG_INFO, + "Updating missed snap status " + "for %s:%d:%s:%d as DONE", + missed_snapinfo->node_snap_info, + snap_opinfo->brick_num, + snap_opinfo->brick_path, + snap_opinfo->op); + ret = 0; + glusterd_free_snap_op (missed_snap_op); + goto out; + } + match = _gf_true; + break; + } else if ((snap_opinfo->brick_num == + missed_snap_op->brick_num) && + (snap_opinfo->op == GF_SNAP_OPTION_TYPE_CREATE) && + (missed_snap_op->op == + GF_SNAP_OPTION_TYPE_DELETE)) { + /* Optimizing create and delete entries for the same + * brick and same node + */ + gf_log (this->name, GF_LOG_INFO, + "Updating missed snap status " + "for %s:%d:%s:%d as DONE", + missed_snapinfo->node_snap_info, + snap_opinfo->brick_num, + snap_opinfo->brick_path, + snap_opinfo->op); + snap_opinfo->status = GD_MISSED_SNAP_DONE; + ret = 0; + glusterd_free_snap_op (missed_snap_op); + goto out; + } + } + + if (match == _gf_true) { + gf_log (this->name, GF_LOG_INFO, + "Duplicate entry. Not updating"); + glusterd_free_snap_op (missed_snap_op); + } else { + list_add_tail (&missed_snap_op->snap_ops_list, + &missed_snapinfo->snap_ops); + } + + ret = 0; +out: + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +/* Add new missed snap entry to the missed_snaps list. */ +int32_t +glusterd_store_missed_snaps_list (char *missed_info, int32_t brick_num, + char *brick_path, int32_t snap_op, + int32_t snap_status) +{ + int32_t ret = -1; + glusterd_missed_snap_info *missed_snapinfo = NULL; + glusterd_snap_op_t *missed_snap_op = NULL; + glusterd_conf_t *priv = NULL; + gf_boolean_t match = _gf_false; + gf_boolean_t free_missed_snap_info = _gf_false; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT(this); + GF_ASSERT(missed_info); + GF_ASSERT(brick_path); + + priv = this->private; + GF_ASSERT (priv); + + /* Create the snap_op object consisting of the * + * snap id and the op */ + ret = glusterd_missed_snap_op_new (&missed_snap_op); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to create new missed snap object."); + ret = -1; + goto out; + } + + missed_snap_op->brick_path = gf_strdup(brick_path); + if (!missed_snap_op->brick_path) { + ret = -1; + goto out; + } + missed_snap_op->brick_num = brick_num; + missed_snap_op->op = snap_op; + missed_snap_op->status = snap_status; + + /* Look for other entries for the same node and same snap */ + list_for_each_entry (missed_snapinfo, &priv->missed_snaps_list, + missed_snaps) { + if (!strcmp (missed_snapinfo->node_snap_info, + missed_info)) { + /* Found missed snapshot info for * + * the same node and same snap */ + match = _gf_true; + break; + } + } + + if (match == _gf_false) { + /* First snap op missed for the brick */ + ret = glusterd_missed_snapinfo_new (&missed_snapinfo); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to create missed snapinfo"); + goto out; + } + free_missed_snap_info = _gf_true; + missed_snapinfo->node_snap_info = gf_strdup(missed_info); + if (!missed_snapinfo->node_snap_info) { + ret = -1; + goto out; + } + + list_add_tail (&missed_snap_op->snap_ops_list, + &missed_snapinfo->snap_ops); + list_add_tail (&missed_snapinfo->missed_snaps, + &priv->missed_snaps_list); + + ret = 0; + goto out; + } else { + ret = glusterd_update_missed_snap_entry (missed_snapinfo, + missed_snap_op); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to update existing missed snap entry."); + goto out; + } + } + +out: + if (ret) { + glusterd_free_snap_op (missed_snap_op); + + if (missed_snapinfo && + (free_missed_snap_info == _gf_true)) { + if (missed_snapinfo->node_snap_info) + GF_FREE (missed_snapinfo->node_snap_info); + + GF_FREE (missed_snapinfo); + } + } + + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} + +/* Add missing snap entries to the in-memory conf->missed_snap_list */ +int32_t +glusterd_add_missed_snaps_to_list (dict_t *dict, int32_t missed_snap_count) +{ + char *buf = NULL; + char *tmp = NULL; + char *save_ptr = NULL; + char *nodeid = NULL; + char *snap_uuid = NULL; + char *brick_path = NULL; + char missed_info[PATH_MAX] = ""; + char name_buf[PATH_MAX] = ""; + int32_t i = -1; + int32_t ret = -1; + int32_t brick_num = -1; + int32_t snap_op = -1; + int32_t snap_status = -1; + glusterd_conf_t *priv = NULL; + xlator_t *this = NULL; + + this = THIS; + GF_ASSERT(this); + GF_ASSERT(dict); + + priv = this->private; + GF_ASSERT (priv); + + /* We can update the missed_snaps_list without acquiring * + * any additional locks as big lock will be held. */ + for (i = 0; i < missed_snap_count; i++) { + snprintf (name_buf, sizeof(name_buf), "missed_snaps_%d", + i); + ret = dict_get_str (dict, name_buf, &buf); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Unable to fetch %s", name_buf); + goto out; + } + + gf_log (this->name, GF_LOG_DEBUG, "missed_snap_entry = %s", + buf); + + /* Need to make a duplicate string coz the same dictionary * + * is resent to the non-originator nodes */ + tmp = gf_strdup (buf); + if (!tmp) { + ret = -1; + goto out; + } + + /* Fetch the node-id, snap-id, brick_num, + * brick_path, snap_op and snap status + */ + nodeid = strtok_r (tmp, ":", &save_ptr); + snap_uuid = strtok_r (NULL, "=", &save_ptr); + brick_num = atoi(strtok_r (NULL, ":", &save_ptr)); + brick_path = strtok_r (NULL, ":", &save_ptr); + snap_op = atoi(strtok_r (NULL, ":", &save_ptr)); + snap_status = atoi(strtok_r (NULL, ":", &save_ptr)); + + if (!nodeid || !snap_uuid || !brick_path || + brick_num < 1 || snap_op < 1 || + snap_status < 1) { + gf_log (this->name, GF_LOG_ERROR, + "Invalid missed_snap_entry"); + ret = -1; + goto out; + } + + snprintf (missed_info, sizeof(missed_info), "%s:%s", + nodeid, snap_uuid); + + ret = glusterd_store_missed_snaps_list (missed_info, + brick_num, + brick_path, + snap_op, + snap_status); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "Failed to store missed snaps_list"); + goto out; + } + + GF_FREE (tmp); + tmp = NULL; + } + +out: + if (tmp) + GF_FREE (tmp); + + gf_log (this->name, GF_LOG_TRACE, "Returning %d", ret); + return ret; +} |