/* Copyright (c) 2011 Gluster, Inc. This file is part of GlusterFS. GlusterFS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. GlusterFS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #ifndef _CONFIG_H #define _CONFIG_H #include "config.h" #endif #include "common-utils.h" #include "cli1-xdr.h" #include "xdr-generic.h" #include "glusterd.h" #include "glusterd-op-sm.h" #include "glusterd-store.h" #include "glusterd-utils.h" #include "glusterd-volgen.h" #include "run.h" /* misc */ /* In this function, we decide, based on the 'count' of the brick, where to add it in the current volume. 'count' tells us already how many of the given bricks are added. other argument are self- descriptive. */ int add_brick_at_right_order (glusterd_brickinfo_t *brickinfo, glusterd_volinfo_t *volinfo, int count, int32_t stripe_cnt, int32_t replica_cnt) { int idx = 0; int i = 0; int sub_cnt = 0; glusterd_brickinfo_t *brick = NULL; /* The complexity of the function is in deciding at which index to add new brick. Even though it can be defined with a complex single formula for all volume, it is seperated out to make it more readable */ if (stripe_cnt) { /* common formula when 'stripe_count' is set */ /* idx = ((count / ((stripe_cnt * volinfo->replica_count) - volinfo->dist_leaf_count)) * volinfo->dist_leaf_count) + (count + volinfo->dist_leaf_count); */ sub_cnt = volinfo->dist_leaf_count; idx = ((count / ((stripe_cnt * volinfo->replica_count) - sub_cnt)) * sub_cnt) + (count + sub_cnt); goto insert_brick; } /* replica count is set */ /* common formula when 'replica_count' is set */ /* idx = ((count / (replica_cnt - existing_replica_count)) * existing_replica_count) + (count + existing_replica_count); */ sub_cnt = volinfo->replica_count; idx = (count / (replica_cnt - sub_cnt) * sub_cnt) + (count + sub_cnt); insert_brick: i = 0; list_for_each_entry (brick, &volinfo->bricks, brick_list) { i++; if (i < idx) continue; gf_log (THIS->name, GF_LOG_DEBUG, "brick:%s index=%d, count=%d", brick->path, idx, count); list_add (&brickinfo->brick_list, &brick->brick_list); break; } return 0; } static int gd_addbr_validate_stripe_count (glusterd_volinfo_t *volinfo, int stripe_count, int total_bricks, int *type, char *err_str, size_t err_len) { int ret = -1; switch (volinfo->type) { case GF_CLUSTER_TYPE_NONE: if ((volinfo->brick_count * stripe_count) == total_bricks) { /* Change the volume type */ gf_log (THIS->name, GF_LOG_INFO, "Changing the type of volume %s from " "None to 'stripe'", volinfo->volname); *type = GF_CLUSTER_TYPE_STRIPE; ret = 0; goto out; } break; case GF_CLUSTER_TYPE_REPLICATE: if (!(total_bricks % (volinfo->replica_count * stripe_count))) { /* Change the volume type */ *type = GF_CLUSTER_TYPE_STRIPE_REPLICATE; gf_log (THIS->name, GF_LOG_INFO, "Changing the type of volume %s from " "'replicate' to 'replicate-stripe'", volinfo->volname); ret = 0; goto out; } break; case GF_CLUSTER_TYPE_STRIPE: case GF_CLUSTER_TYPE_STRIPE_REPLICATE: if (stripe_count < volinfo->stripe_count) { snprintf (err_str, sizeof (err_str), "wrong stripe count (%d) given. " "already have %d", stripe_count, volinfo->stripe_count); gf_log ("glusterd", GF_LOG_ERROR, "%s", err_str); goto out; } if (stripe_count == volinfo->stripe_count) { if (!(total_bricks % volinfo->dist_leaf_count)) { /* its same as the one which exists */ ret = 1; goto out; } } if (stripe_count > volinfo->stripe_count) { /* We have to make sure before and after 'add-brick', the number or subvolumes for distribute will remain same, when stripe count is given */ if ((volinfo->brick_count * (stripe_count * volinfo->replica_count)) == (total_bricks * volinfo->dist_leaf_count)) { /* Change the dist_leaf_count */ gf_log (THIS->name, GF_LOG_INFO, "Changing the stripe count of " "volume %s from %d to %d", volinfo->volname, volinfo->stripe_count, stripe_count); ret = 0; goto out; } } break; } out: return ret; } static int gd_addbr_validate_replica_count (glusterd_volinfo_t *volinfo, int replica_count, int total_bricks, int *type, char *err_str, int err_len) { int ret = -1; /* replica count is set */ switch (volinfo->type) { case GF_CLUSTER_TYPE_NONE: if ((volinfo->brick_count * replica_count) == total_bricks) { /* Change the volume type */ gf_log (THIS->name, GF_LOG_INFO, "Changing the type of volume %s from " "None to 'replica'", volinfo->volname); *type = GF_CLUSTER_TYPE_REPLICATE; ret = 0; goto out; } break; case GF_CLUSTER_TYPE_STRIPE: if (!(total_bricks % (volinfo->dist_leaf_count * replica_count))) { /* Change the volume type */ *type = GF_CLUSTER_TYPE_STRIPE_REPLICATE; gf_log (THIS->name, GF_LOG_INFO, "Changing the type of volume %s from " "'stripe' to 'replicate-stripe'", volinfo->volname); ret = 0; goto out; } break; case GF_CLUSTER_TYPE_REPLICATE: case GF_CLUSTER_TYPE_STRIPE_REPLICATE: if (replica_count < volinfo->replica_count) { snprintf (err_str, sizeof (err_str), "wrong replica count (%d) given. " "already have %d", replica_count, volinfo->replica_count); gf_log ("glusterd", GF_LOG_ERROR, "%s", err_str); goto out; } if (replica_count == volinfo->replica_count) { if (!(total_bricks % volinfo->dist_leaf_count)) { ret = 1; goto out; } } if (replica_count > volinfo->replica_count) { /* We have to make sure before and after 'add-brick', the number or subvolumes for distribute will remain same, when replica count is given */ if ((total_bricks * volinfo->dist_leaf_count) == (volinfo->brick_count * (replica_count * volinfo->stripe_count))) { /* Change the dist_leaf_count */ gf_log (THIS->name, GF_LOG_INFO, "Changing the replica count of " "volume %s from %d to %d", volinfo->volname, volinfo->replica_count, replica_count); ret = 0; goto out; } } break; } out: return ret; } static int gd_rmbr_validate_replica_count (glusterd_volinfo_t *volinfo, int32_t replica_count, int32_t brick_count, char *err_str) { int ret = -1; int replica_nodes = 0; switch (volinfo->type) { case GF_CLUSTER_TYPE_NONE: case GF_CLUSTER_TYPE_STRIPE: snprintf (err_str, 2048, "replica count (%d) option given for non replicate " "volume %s", replica_count, volinfo->volname); gf_log (THIS->name, GF_LOG_WARNING, "%s", err_str); goto out; case GF_CLUSTER_TYPE_REPLICATE: case GF_CLUSTER_TYPE_STRIPE_REPLICATE: /* in remove brick, you can only reduce the replica count */ if (replica_count > volinfo->replica_count) { snprintf (err_str, 2048, "given replica count (%d) option is more " "than volume %s's replica count (%d)", replica_count, volinfo->volname, volinfo->replica_count); gf_log (THIS->name, GF_LOG_WARNING, "%s", err_str); goto out; } if (replica_count == volinfo->replica_count) { ret = 1; goto out; } replica_nodes = ((volinfo->brick_count / volinfo->replica_count) * (volinfo->replica_count - replica_count)); if (brick_count % replica_nodes) { snprintf (err_str, 2048, "need %d(xN) bricks for reducing replica " "count of the volume from %d to %d", replica_nodes, volinfo->replica_count, replica_count); goto out; } break; } ret = 0; out: return ret; } /* Handler functions */ int glusterd_handle_add_brick (rpcsvc_request_t *req) { int32_t ret = -1; gf_cli_req cli_req = {{0,}}; dict_t *dict = NULL; char *bricks = NULL; char *volname = NULL; int brick_count = 0; char *brick_list = NULL; void *cli_rsp = NULL; char err_str[2048] = {0,}; gf_cli_rsp rsp = {0,}; glusterd_volinfo_t *volinfo = NULL; xlator_t *this = NULL; int total_bricks = 0; int32_t replica_count = 0; int32_t stripe_count = 0; int type = 0; this = THIS; GF_ASSERT(this); GF_ASSERT (req); if (!xdr_to_generic (req->msg[0], &cli_req, (xdrproc_t)xdr_gf_cli_req)) { //failed to decode msg; req->rpc_err = GARBAGE_ARGS; snprintf (err_str, sizeof (err_str), "Garbage args received"); goto out; } gf_log ("glusterd", GF_LOG_INFO, "Received add brick req"); if (cli_req.dict.dict_len) { /* Unserialize the dictionary */ dict = dict_new (); ret = dict_unserialize (cli_req.dict.dict_val, cli_req.dict.dict_len, &dict); if (ret < 0) { gf_log ("glusterd", GF_LOG_ERROR, "failed to " "unserialize req-buffer to dictionary"); snprintf (err_str, sizeof (err_str), "Unable to decode " "the buffer"); goto out; } } ret = dict_get_str (dict, "volname", &volname); gf_cmd_log ("Volume add-brick", "on volname: %s attempted", volname); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get volume name"); snprintf (err_str, sizeof (err_str), "Unable to get volume " "name"); goto out; } if (!(ret = glusterd_check_volume_exists (volname))) { ret = -1; snprintf(err_str, 2048, "Volume %s does not exist", volname); gf_log ("glusterd", GF_LOG_ERROR, "%s", err_str); goto out; } ret = dict_get_int32 (dict, "count", &brick_count); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get count"); snprintf (err_str, sizeof (err_str), "Unable to get volume " "brick count"); goto out; } ret = dict_get_int32 (dict, "replica-count", &replica_count); if (!ret) { gf_log (THIS->name, GF_LOG_INFO, "replica-count is %d", replica_count); } ret = dict_get_int32 (dict, "stripe-count", &stripe_count); if (!ret) { gf_log (THIS->name, GF_LOG_INFO, "stripe-count is %d", stripe_count); } ret = glusterd_volinfo_find (volname, &volinfo); if (ret) { snprintf (err_str, sizeof (err_str), "Unable to get volinfo " "for volume name %s", volname); gf_log ("glusterd", GF_LOG_ERROR, "%s", err_str); goto out; } total_bricks = volinfo->brick_count + brick_count; if (!stripe_count && !replica_count) { if (volinfo->type == GF_CLUSTER_TYPE_NONE) goto brick_val; if ((volinfo->brick_count < volinfo->dist_leaf_count) && (total_bricks <= volinfo->dist_leaf_count)) goto brick_val; if ((brick_count % volinfo->dist_leaf_count) != 0) { snprintf(err_str, 2048, "Incorrect number of bricks" " supplied %d with count %d", brick_count, volinfo->dist_leaf_count); gf_log("glusterd", GF_LOG_ERROR, "%s", err_str); ret = -1; goto out; } goto brick_val; /* done with validation.. below section is if stripe|replica count is given */ } /* These bricks needs to be added one per a replica or stripe volume */ if (stripe_count) { ret = gd_addbr_validate_stripe_count (volinfo, stripe_count, total_bricks, &type, err_str, sizeof (err_str)); if (ret == -1) { gf_log ("glusterd", GF_LOG_ERROR, "%s", err_str); goto out; } /* if stripe count is same as earlier, set it back to 0 */ if (ret == 1) stripe_count = 0; goto brick_val; } ret = gd_addbr_validate_replica_count (volinfo, replica_count, total_bricks, &type, err_str, sizeof (err_str)); if (ret == -1) { gf_log ("glusterd", GF_LOG_ERROR, "%s", err_str); goto out; } /* if replica count is same as earlier, set it back to 0 */ if (ret == 1) replica_count = 0; brick_val: ret = dict_get_str (dict, "bricks", &bricks); if (ret) { snprintf (err_str, sizeof (err_str), "Unable to get volume " "bricks"); gf_log ("glusterd", GF_LOG_ERROR, "%s", err_str); goto out; } gf_cmd_log ("Volume add-brick", "volname: %s type %d count:%d bricks:%s" ,volname, volinfo->type, brick_count, brick_list); if (type != volinfo->type) { ret = dict_set_int32 (dict, "type", type); if (ret) gf_log (THIS->name, GF_LOG_ERROR, "failed to set the new type in dict"); } ret = glusterd_op_begin (req, GD_OP_ADD_BRICK, dict); out: gf_cmd_log ("Volume add-brick","on volname: %s %s", volname, (ret != 0)? "FAILED" : "SUCCESS"); if (ret) { if (dict) dict_unref (dict); rsp.op_ret = -1; rsp.op_errno = 0; if (err_str[0] == '\0') snprintf (err_str, sizeof (err_str), "Operation failed"); rsp.op_errstr = err_str; cli_rsp = &rsp; glusterd_submit_reply(req, cli_rsp, NULL, 0, NULL, (xdrproc_t)xdr_gf_cli_rsp); ret = 0; //sent error to cli, prevent second reply } glusterd_friend_sm (); glusterd_op_sm (); if (cli_req.dict.dict_val) free (cli_req.dict.dict_val); //its malloced by xdr return ret; } int glusterd_handle_remove_brick (rpcsvc_request_t *req) { int32_t ret = -1; gf_cli_req cli_req = {{0,}}; dict_t *dict = NULL; int32_t count = 0; char *brick = NULL; char key[256] = {0,}; char *brick_list = NULL; int i = 1; glusterd_volinfo_t *volinfo = NULL; glusterd_brickinfo_t *brickinfo = NULL; int32_t pos = 0; int32_t sub_volume = 0; int32_t sub_volume_start = 0; int32_t sub_volume_end = 0; glusterd_brickinfo_t *tmp = NULL; char err_str[2048] = {0}; gf_cli_rsp rsp = {0,}; void *cli_rsp = NULL; char vol_type[256] = {0,}; int32_t replica_count = 0; int32_t brick_index = 0; int32_t tmp_brick_idx = 0; int found = 0; int diff_count = 0; char *volname = 0; GF_ASSERT (req); if (!xdr_to_generic (req->msg[0], &cli_req, (xdrproc_t)xdr_gf_cli_req)) { //failed to decode msg; req->rpc_err = GARBAGE_ARGS; goto out; } gf_log ("glusterd", GF_LOG_INFO, "Received rem brick req"); if (cli_req.dict.dict_len) { /* Unserialize the dictionary */ dict = dict_new (); ret = dict_unserialize (cli_req.dict.dict_val, cli_req.dict.dict_len, &dict); if (ret < 0) { gf_log ("glusterd", GF_LOG_ERROR, "failed to " "unserialize req-buffer to dictionary"); goto out; } } ret = dict_get_str (dict, "volname", &volname); if (ret) { gf_log (THIS->name, GF_LOG_ERROR, "Unable to get volname"); goto out; } gf_cmd_log ("Volume remove-brick","on volname: %s attempted", volname); ret = dict_get_int32 (dict, "count", &count); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get count"); goto out; } ret = glusterd_volinfo_find (volname, &volinfo); if (ret) { snprintf (err_str, 2048, "Volume %s does not exist", volname); gf_log ("", GF_LOG_ERROR, "%s", err_str); goto out; } ret = dict_get_int32 (dict, "replica-count", &replica_count); if (!ret) { gf_log (THIS->name, GF_LOG_INFO, "request to change replica-count to %d", replica_count); ret = gd_rmbr_validate_replica_count (volinfo, replica_count, count, err_str); if (ret < 0) { /* logging and error msg are done in above function itself */ goto out; } dict_del (dict, "replica-count"); if (ret) { replica_count = 0; } else { ret = dict_set_int32 (dict, "replica-count", replica_count); if (ret) { gf_log (THIS->name, GF_LOG_WARNING, "failed to set the replica_count in dict"); goto out; } } } /* 'vol_type' is used for giving the meaning full error msg for user */ if (volinfo->type == GF_CLUSTER_TYPE_REPLICATE) { strcpy (vol_type, "replica"); } else if (volinfo->type == GF_CLUSTER_TYPE_STRIPE) { strcpy (vol_type, "stripe"); } else if (volinfo->type == GF_CLUSTER_TYPE_STRIPE_REPLICATE) { strcpy (vol_type, "stripe-replicate"); } else { strcpy (vol_type, "distribute"); } /* Do not allow remove-brick if the volume is plain stripe */ if ((volinfo->type == GF_CLUSTER_TYPE_STRIPE) && (volinfo->brick_count == volinfo->stripe_count)) { snprintf (err_str, 2048, "Removing brick from a plain stripe is not allowed"); gf_log ("glusterd", GF_LOG_ERROR, "%s", err_str); ret = -1; goto out; } /* Do not allow remove-brick if the bricks given is less than the replica count or stripe count */ if (!replica_count && (volinfo->type != GF_CLUSTER_TYPE_NONE) && !(volinfo->brick_count <= volinfo->dist_leaf_count)) { if (volinfo->dist_leaf_count && (count % volinfo->dist_leaf_count)) { snprintf (err_str, 2048, "Remove brick incorrect" " brick count of %d for %s %d", count, vol_type, volinfo->dist_leaf_count); gf_log ("", GF_LOG_ERROR, "%s", err_str); ret = -1; goto out; } } brick_list = GF_MALLOC (120000 * sizeof(*brick_list),gf_common_mt_char); if (!brick_list) { ret = -1; goto out; } strcpy (brick_list, " "); while ( i <= count) { snprintf (key, 256, "brick%d", i); ret = dict_get_str (dict, key, &brick); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get %s", key); goto out; } gf_log ("", GF_LOG_DEBUG, "Remove brick count %d brick: %s", i, brick); ret = glusterd_volume_brickinfo_get_by_brick(brick, volinfo, &brickinfo, GF_PATH_COMPLETE); if (ret) { snprintf(err_str, 2048,"Incorrect brick %s for volume" " %s", brick, volname); gf_log ("", GF_LOG_ERROR, "%s", err_str); goto out; } strcat(brick_list, brick); strcat(brick_list, " "); i++; if ((volinfo->type == GF_CLUSTER_TYPE_NONE) || (volinfo->brick_count <= volinfo->dist_leaf_count)) continue; if (replica_count) { /* do the validation of bricks here */ /* -2 because i++ is already done, and i starts with 1, instead of 0 */ diff_count = (volinfo->replica_count - replica_count); brick_index = (((i -2) / diff_count) * volinfo->replica_count); tmp_brick_idx = 0; found = 0; list_for_each_entry (tmp, &volinfo->bricks, brick_list) { tmp_brick_idx++; gf_log (THIS->name, GF_LOG_TRACE, "validate brick %s:%s (%d %d %d)", tmp->hostname, tmp->path, tmp_brick_idx, brick_index, volinfo->replica_count); if (tmp_brick_idx <= brick_index) continue; if (tmp_brick_idx > (brick_index + volinfo->replica_count)) break; if ((!strcmp (tmp->hostname,brickinfo->hostname)) && !strcmp (tmp->path, brickinfo->path)) { found = 1; break; } } if (found) continue; snprintf(err_str, 2048,"Bricks are from same subvol"); gf_log (THIS->name, GF_LOG_INFO, "failed to validate brick %s:%s (%d %d %d)", tmp->hostname, tmp->path, tmp_brick_idx, brick_index, volinfo->replica_count); ret = -1; /* brick order is not valid */ goto out; } pos = 0; list_for_each_entry (tmp, &volinfo->bricks, brick_list) { if (strcmp (tmp->hostname,brickinfo->hostname) || strcmp (tmp->path, brickinfo->path)) { pos++; continue; } gf_log ("", GF_LOG_INFO, "Found brick"); if (!sub_volume && (volinfo->dist_leaf_count > 1)) { sub_volume = (pos / volinfo->dist_leaf_count) + 1; sub_volume_start = (volinfo->dist_leaf_count * (sub_volume - 1)); sub_volume_end = (volinfo->dist_leaf_count * sub_volume) - 1; } else { if (pos < sub_volume_start || pos >sub_volume_end) { ret = -1; snprintf(err_str, 2048,"Bricks not from" " same subvol for %s", vol_type); gf_log ("", GF_LOG_ERROR, "%s", err_str); goto out; } } break; } } gf_cmd_log ("Volume remove-brick","volname: %s count:%d bricks:%s", volname, count, brick_list); ret = glusterd_op_begin (req, GD_OP_REMOVE_BRICK, dict); gf_cmd_log ("Volume remove-brick","on volname: %s %s", volname, (ret) ? "FAILED" : "SUCCESS"); out: if (ret) { if (dict) dict_unref (dict); rsp.op_ret = -1; rsp.op_errno = 0; if (err_str[0] == '\0') snprintf (err_str, sizeof (err_str), "Operation failed"); gf_log ("", GF_LOG_ERROR, "%s", err_str); rsp.op_errstr = err_str; cli_rsp = &rsp; glusterd_submit_reply(req, cli_rsp, NULL, 0, NULL, (xdrproc_t)xdr_gf_cli_rsp); ret = 0; //sent error to cli, prevent second reply } if (brick_list) GF_FREE (brick_list); if (cli_req.dict.dict_val) free (cli_req.dict.dict_val); //its malloced by xdr glusterd_friend_sm (); glusterd_op_sm (); return ret; } /* op-sm */ int glusterd_op_perform_add_bricks (glusterd_volinfo_t *volinfo, int32_t count, char *bricks, dict_t *dict) { glusterd_brickinfo_t *brickinfo = NULL; char *brick = NULL; int32_t i = 1; char *brick_list = NULL; char *free_ptr1 = NULL; char *free_ptr2 = NULL; char *saveptr = NULL; int32_t ret = -1; int32_t stripe_count = 0; int32_t replica_count = 0; int32_t type = 0; GF_ASSERT (volinfo); if (bricks) { brick_list = gf_strdup (bricks); free_ptr1 = brick_list; } if (count) brick = strtok_r (brick_list+1, " \n", &saveptr); if (dict) { ret = dict_get_int32 (dict, "stripe-count", &stripe_count); if (!ret) gf_log (THIS->name, GF_LOG_INFO, "stripe-count is set %d", stripe_count); ret = dict_get_int32 (dict, "replica-count", &replica_count); if (!ret) gf_log (THIS->name, GF_LOG_INFO, "replica-count is set %d", replica_count); ret = dict_get_int32 (dict, "type", &type); if (!ret) gf_log (THIS->name, GF_LOG_INFO, "type is set %d, need to change it", type); } while ( i <= count) { ret = glusterd_brickinfo_from_brick (brick, &brickinfo); if (ret) goto out; ret = glusterd_resolve_brick (brickinfo); if (ret) goto out; if (stripe_count || replica_count) { add_brick_at_right_order (brickinfo, volinfo, (i - 1), stripe_count, replica_count); } else { list_add_tail (&brickinfo->brick_list, &volinfo->bricks); } brick = strtok_r (NULL, " \n", &saveptr); i++; volinfo->brick_count++; } /* Gets changed only if the options are given in add-brick cli */ if (type) volinfo->type = type; if (replica_count) { volinfo->replica_count = replica_count; } if (stripe_count) { volinfo->stripe_count = stripe_count; } volinfo->dist_leaf_count = (volinfo->stripe_count * volinfo->replica_count); /* backward compatibility */ volinfo->sub_count = ((volinfo->dist_leaf_count == 1) ? 0: volinfo->dist_leaf_count); brick_list = gf_strdup (bricks); free_ptr2 = brick_list; i = 1; if (count) brick = strtok_r (brick_list+1, " \n", &saveptr); ret = glusterd_create_volfiles_and_notify_services (volinfo); if (ret) goto out; while (i <= count) { ret = glusterd_volume_brickinfo_get_by_brick (brick, volinfo, &brickinfo, GF_PATH_PARTIAL); if (ret) goto out; if (GLUSTERD_STATUS_STARTED == volinfo->status) { ret = glusterd_brick_start (volinfo, brickinfo); if (ret) goto out; } i++; brick = strtok_r (NULL, " \n", &saveptr); } out: if (free_ptr1) GF_FREE (free_ptr1); if (free_ptr2) GF_FREE (free_ptr2); gf_log ("", GF_LOG_DEBUG, "Returning %d", ret); return ret; } int glusterd_op_perform_remove_brick (glusterd_volinfo_t *volinfo, char *brick, int force, int *need_migrate) { glusterd_brickinfo_t *brickinfo = NULL; char *dup_brick = NULL; int32_t ret = -1; glusterd_conf_t *priv = NULL; GF_ASSERT (volinfo); GF_ASSERT (brick); priv = THIS->private; GF_ASSERT (priv); dup_brick = gf_strdup (brick); if (!dup_brick) goto out; ret = glusterd_volume_brickinfo_get_by_brick (dup_brick, volinfo, &brickinfo, GF_PATH_COMPLETE); if (ret) goto out; ret = glusterd_resolve_brick (brickinfo); if (ret) goto out; if (!uuid_compare (brickinfo->uuid, priv->uuid)) { /* Only if the brick is in this glusterd, do the rebalance */ if (need_migrate) *need_migrate = 1; } if (force) { if (GLUSTERD_STATUS_STARTED == volinfo->status) { ret = glusterd_brick_stop (volinfo, brickinfo); if (ret) { gf_log (THIS->name, GF_LOG_ERROR, "Unable to stop " "glusterfs, ret: %d", ret); goto out; } } glusterd_delete_brick (volinfo, brickinfo); goto out; } brickinfo->decommissioned = 1; out: if (dup_brick) GF_FREE (dup_brick); gf_log ("", GF_LOG_DEBUG, "Returning %d", ret); return ret; } int glusterd_op_stage_add_brick (dict_t *dict, char **op_errstr) { int ret = 0; char *volname = NULL; int count = 0; int i = 0; char *bricks = NULL; char *brick_list = NULL; char *saveptr = NULL; char *free_ptr = NULL; char *brick = NULL; glusterd_brickinfo_t *brickinfo = NULL; glusterd_volinfo_t *volinfo = NULL; char cmd_str[1024]; glusterd_conf_t *priv = NULL; char msg[2048] = {0,}; gf_boolean_t brick_alloc = _gf_false; char *all_bricks = NULL; char *str_ret = NULL; priv = THIS->private; if (!priv) goto out; ret = dict_get_str (dict, "volname", &volname); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get volume name"); goto out; } ret = glusterd_volinfo_find (volname, &volinfo); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to find volume: %s", volname); goto out; } if (glusterd_is_defrag_on(volinfo)) { snprintf (msg, sizeof(msg), "Volume name %s rebalance is in " "progress. Please retry after completion", volname); gf_log ("glusterd", GF_LOG_ERROR, "%s", msg); *op_errstr = gf_strdup (msg); ret = -1; goto out; } ret = dict_get_int32 (dict, "count", &count); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get count"); goto out; } ret = dict_get_str (dict, "bricks", &bricks); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get bricks"); goto out; } if (bricks) { brick_list = gf_strdup (bricks); all_bricks = gf_strdup (bricks); free_ptr = brick_list; } /* Check whether any of the bricks given is the destination brick of the replace brick running */ str_ret = glusterd_check_brick_rb_part (all_bricks, count, volinfo); if (str_ret) { gf_log ("glusterd", GF_LOG_ERROR, "%s", str_ret); *op_errstr = gf_strdup (str_ret); ret = -1; goto out; } if (count) brick = strtok_r (brick_list+1, " \n", &saveptr); while ( i < count) { if (!glusterd_store_is_valid_brickpath (volname, brick) || !glusterd_is_valid_volfpath (volname, brick)) { snprintf (msg, sizeof (msg), "brick path %s is too " "long.", brick); gf_log ("", GF_LOG_ERROR, "%s", msg); *op_errstr = gf_strdup (msg); ret = -1; goto out; } ret = glusterd_volume_brickinfo_get_by_brick (brick, volinfo, &brickinfo, GF_PATH_PARTIAL); if (!ret) { gf_log ("", GF_LOG_ERROR, "Adding duplicate brick: %s", brick); ret = -1; goto out; } else { ret = glusterd_brickinfo_from_brick (brick, &brickinfo); if (ret) { gf_log ("", GF_LOG_ERROR, "Add-brick: Unable" " to get brickinfo"); goto out; } brick_alloc = _gf_true; } snprintf (cmd_str, 1024, "%s", brickinfo->path); ret = glusterd_resolve_brick (brickinfo); if (ret) { gf_log ("glusterd", GF_LOG_ERROR, "resolve brick failed"); goto out; } if (!uuid_compare (brickinfo->uuid, priv->uuid)) { ret = glusterd_brick_create_path (brickinfo->hostname, brickinfo->path, volinfo->volume_id, 0777, op_errstr); if (ret) goto out; } glusterd_brickinfo_delete (brickinfo); brick_alloc = _gf_false; brickinfo = NULL; brick = strtok_r (NULL, " \n", &saveptr); i++; } out: if (free_ptr) GF_FREE (free_ptr); if (brick_alloc && brickinfo) glusterd_brickinfo_delete (brickinfo); if (str_ret) GF_FREE (str_ret); if (all_bricks) GF_FREE (all_bricks); gf_log ("", GF_LOG_DEBUG, "Returning %d", ret); return ret; } int glusterd_op_stage_remove_brick (dict_t *dict, char **op_errstr) { int ret = -1; char *volname = NULL; glusterd_volinfo_t *volinfo = NULL; char *errstr = NULL; int32_t brick_count = 0; char msg[2048] = {0,}; int32_t flag = 0; gf1_op_commands cmd = GF_OP_CMD_NONE; ret = dict_get_str (dict, "volname", &volname); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get volume name"); goto out; } ret = glusterd_volinfo_find (volname, &volinfo); if (ret) { gf_log ("", GF_LOG_ERROR, "Volume %s does not exist", volname); goto out; } ret = dict_get_int32 (dict, "command", &flag); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get brick count"); goto out; } cmd = flag; ret = -1; switch (cmd) { case GF_OP_CMD_NONE: errstr = gf_strdup ("no remove-brick command issued"); goto out; case GF_OP_CMD_STATUS: ret = 0; goto out; case GF_OP_CMD_START: { if (GLUSTERD_STATUS_STARTED != volinfo->status) { snprintf (msg, sizeof (msg), "Volume %s needs to be started " "before remove-brick (you can use 'force' or " "'commit' to override this behavior)", volinfo->volname); errstr = gf_strdup (msg); gf_log (THIS->name, GF_LOG_ERROR, "%s", errstr); goto out; } if (glusterd_is_defrag_on(volinfo)) { errstr = gf_strdup("Rebalance is in progress. Please retry" " after completion"); gf_log ("glusterd", GF_LOG_ERROR, "%s", errstr); goto out; } break; } case GF_OP_CMD_PAUSE: case GF_OP_CMD_ABORT: { if (!volinfo->decommission_in_progress) { errstr = gf_strdup("remove-brick is not in progress"); gf_log ("glusterd", GF_LOG_ERROR, "%s", errstr); goto out; } break; } case GF_OP_CMD_COMMIT: if (volinfo->decommission_in_progress) { errstr = gf_strdup ("use 'force' option as migration " "is in progress"); goto out; } break; case GF_OP_CMD_COMMIT_FORCE: break; } ret = dict_get_int32 (dict, "count", &brick_count); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get brick count"); goto out; } ret = 0; if (volinfo->brick_count == brick_count) { errstr = gf_strdup ("Deleting all the bricks of the " "volume is not allowed"); ret = -1; goto out; } out: gf_log ("", GF_LOG_DEBUG, "Returning %d", ret); if (ret && errstr) { if (op_errstr) *op_errstr = errstr; } return ret; } int glusterd_remove_brick_migrate_cbk (glusterd_volinfo_t *volinfo, gf_defrag_status_t status) { int ret = 0; #if 0 /* TODO: enable this behavior once cluster-wide awareness comes for defrag cbk function */ glusterd_brickinfo_t *brickinfo = NULL; glusterd_brickinfo_t *tmp = NULL; switch (status) { case GF_DEFRAG_STATUS_PAUSED: case GF_DEFRAG_STATUS_FAILED: /* No changes required in the volume file. everything should remain as is */ break; case GF_DEFRAG_STATUS_STOPPED: /* Fall back to the old volume file */ list_for_each_entry_safe (brickinfo, tmp, &volinfo->bricks, brick_list) { if (!brickinfo->decommissioned) continue; brickinfo->decommissioned = 0; } break; case GF_DEFRAG_STATUS_COMPLETE: /* Done with the task, you can remove the brick from the volume file */ list_for_each_entry_safe (brickinfo, tmp, &volinfo->bricks, brick_list) { if (!brickinfo->decommissioned) continue; gf_log (THIS->name, GF_LOG_INFO, "removing the brick %s", brickinfo->path); brickinfo->decommissioned = 0; if (GLUSTERD_STATUS_STARTED == volinfo->status) { ret = glusterd_brick_stop (volinfo, brickinfo); if (ret) { gf_log (THIS->name, GF_LOG_ERROR, "Unable to stop glusterfs (%d)", ret); } } glusterd_delete_brick (volinfo, brickinfo); } break; default: GF_ASSERT (!"cbk function called with wrong status"); break; } ret = glusterd_create_volfiles_and_notify_services (volinfo); if (ret) gf_log (THIS->name, GF_LOG_ERROR, "Unable to write volume files (%d)", ret); ret = glusterd_store_volinfo (volinfo, GLUSTERD_VOLINFO_VER_AC_INCREMENT); if (ret) gf_log (THIS->name, GF_LOG_ERROR, "Unable to store volume info (%d)", ret); if (GLUSTERD_STATUS_STARTED == volinfo->status) { ret = glusterd_check_generate_start_nfs (); if (ret) gf_log (THIS->name, GF_LOG_ERROR, "Unable to start nfs process (%d)", ret); } #endif volinfo->decommission_in_progress = 0; return ret; } int glusterd_op_add_brick (dict_t *dict, char **op_errstr) { int ret = 0; char *volname = NULL; glusterd_conf_t *priv = NULL; glusterd_volinfo_t *volinfo = NULL; xlator_t *this = NULL; char *bricks = NULL; int32_t count = 0; this = THIS; GF_ASSERT (this); priv = this->private; GF_ASSERT (priv); ret = dict_get_str (dict, "volname", &volname); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get volume name"); goto out; } ret = glusterd_volinfo_find (volname, &volinfo); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to allocate memory"); goto out; } ret = dict_get_int32 (dict, "count", &count); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get count"); goto out; } ret = dict_get_str (dict, "bricks", &bricks); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get bricks"); goto out; } ret = glusterd_op_perform_add_bricks (volinfo, count, bricks, dict); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to add bricks"); goto out; } /* Need to reset the defrag/rebalance status accordingly */ switch (volinfo->defrag_status) { case GF_DEFRAG_STATUS_FAILED: case GF_DEFRAG_STATUS_COMPLETE: case GF_DEFRAG_STATUS_LAYOUT_FIX_COMPLETE: case GF_DEFRAG_STATUS_MIGRATE_DATA_COMPLETE: volinfo->defrag_status = 0; default: break; } ret = glusterd_store_volinfo (volinfo, GLUSTERD_VOLINFO_VER_AC_INCREMENT); if (ret) goto out; if (GLUSTERD_STATUS_STARTED == volinfo->status) ret = glusterd_nodesvcs_handle_graph_change (volinfo); out: return ret; } int glusterd_op_remove_brick (dict_t *dict, char **op_errstr) { int ret = -1; char *volname = NULL; glusterd_volinfo_t *volinfo = NULL; char *brick = NULL; int32_t count = 0; int32_t i = 1; char key[256] = {0,}; int32_t flag = 0; char err_str[4096] = {0,}; int need_rebalance = 0; int force = 0; gf1_op_commands cmd = 0; int32_t replica_count = 0; glusterd_brickinfo_t *brickinfo = NULL; glusterd_brickinfo_t *tmp = NULL; ret = dict_get_str (dict, "volname", &volname); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get volume name"); goto out; } ret = glusterd_volinfo_find (volname, &volinfo); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to allocate memory"); goto out; } ret = dict_get_int32 (dict, "command", &flag); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get brick count"); goto out; } cmd = flag; ret = -1; switch (cmd) { case GF_OP_CMD_NONE: goto out; case GF_OP_CMD_STATUS: ret = 0; goto out; case GF_OP_CMD_PAUSE: { if (volinfo->decommission_in_progress) { if (volinfo->defrag) { LOCK (&volinfo->defrag->lock); volinfo->defrag_status = GF_DEFRAG_STATUS_PAUSED; UNLOCK (&volinfo->defrag->lock); } } /* no need to update anything */ ret = 0; goto out; } case GF_OP_CMD_ABORT: { if (volinfo->decommission_in_progress) { if (volinfo->defrag) { LOCK (&volinfo->defrag->lock); volinfo->defrag_status = GF_DEFRAG_STATUS_STOPPED; UNLOCK (&volinfo->defrag->lock); } } /* Fall back to the old volume file */ list_for_each_entry_safe (brickinfo, tmp, &volinfo->bricks, brick_list) { if (!brickinfo->decommissioned) continue; brickinfo->decommissioned = 0; } ret = 0; break; } case GF_OP_CMD_START: force = 0; break; case GF_OP_CMD_COMMIT: force = 1; break; case GF_OP_CMD_COMMIT_FORCE: if (volinfo->decommission_in_progress) { if (volinfo->defrag) { LOCK (&volinfo->defrag->lock); /* Fake 'rebalance-complete' so the graph change happens right away */ volinfo->defrag_status = GF_DEFRAG_STATUS_COMPLETE; UNLOCK (&volinfo->defrag->lock); } /* Graph change happens in rebalance _cbk function, no need to do anything here */ /* TODO: '_cbk' function is not doing anything for now */ } ret = 0; force = 1; break; } ret = dict_get_int32 (dict, "count", &count); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get count"); goto out; } while ( i <= count) { snprintf (key, 256, "brick%d", i); ret = dict_get_str (dict, key, &brick); if (ret) { gf_log ("", GF_LOG_ERROR, "Unable to get %s", key); goto out; } ret = glusterd_op_perform_remove_brick (volinfo, brick, force, (i == 1) ? &need_rebalance : NULL); if (ret) goto out; i++; } ret = dict_get_int32 (dict, "replica-count", &replica_count); if (!ret) { gf_log (THIS->name, GF_LOG_INFO, "changing replica count %d to %d on volume %s", volinfo->replica_count, replica_count, volinfo->volname); volinfo->replica_count = replica_count; volinfo->dist_leaf_count = (volinfo->stripe_count * replica_count); if (replica_count == 1) { if (volinfo->type == GF_CLUSTER_TYPE_REPLICATE) { volinfo->type = GF_CLUSTER_TYPE_NONE; /* backward compatibility */ volinfo->sub_count = 0; } else { volinfo->type = GF_CLUSTER_TYPE_STRIPE; /* backward compatibility */ volinfo->sub_count = volinfo->dist_leaf_count; } } } ret = glusterd_create_volfiles_and_notify_services (volinfo); if (ret) { gf_log (THIS->name, GF_LOG_WARNING, "failed to create volfiles"); goto out; } ret = glusterd_store_volinfo (volinfo, GLUSTERD_VOLINFO_VER_AC_INCREMENT); if (ret) { gf_log (THIS->name, GF_LOG_WARNING, "failed to store volinfo"); goto out; } /* Need to reset the defrag/rebalance status accordingly */ switch (volinfo->defrag_status) { case GF_DEFRAG_STATUS_FAILED: case GF_DEFRAG_STATUS_COMPLETE: case GF_DEFRAG_STATUS_LAYOUT_FIX_COMPLETE: case GF_DEFRAG_STATUS_MIGRATE_DATA_COMPLETE: volinfo->defrag_status = 0; default: break; } if (!force && need_rebalance) { /* perform the rebalance operations */ ret = glusterd_handle_defrag_start (volinfo, err_str, 4096, GF_DEFRAG_CMD_START_FORCE, glusterd_remove_brick_migrate_cbk); if (!ret) volinfo->decommission_in_progress = 1; if (ret) { gf_log (THIS->name, GF_LOG_ERROR, "failed to start the rebalance"); } } else { if (GLUSTERD_STATUS_STARTED == volinfo->status) ret = glusterd_nodesvcs_handle_graph_change (volinfo); } out: if (ret && err_str[0] && op_errstr) *op_errstr = gf_strdup (err_str); return ret; }