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Google-dht-common.c
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Google-dht-common.c
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/*
Copyright (c) 2008-2012 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.
*/
/* TODO: add NS locking */
#include "dht-common.h"
#include "byte-order.h"
#include "defaults.h"
#include "dht-lock.h"
#include "glusterfs.h"
#include "libxlator.h"
#include "quota-common-utils.h"
#include "upcall-utils.h"
#include "xlator.h"
#include <libgen.h>
#include <signal.h>
#include <sys/time.h>
int run_defrag = 0;
int dht_link2(xlator_t *this, xlator_t *dst_node, call_frame_t *frame, int ret);
int dht_removexattr2(xlator_t *this, xlator_t *subvol, call_frame_t *frame,
int ret);
int dht_setxattr2(xlator_t *this, xlator_t *subvol, call_frame_t *frame,
int ret);
int dht_rmdir_readdirp_do(call_frame_t *readdirp_frame, xlator_t *this);
int dht_common_xattrop_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
int32_t op_ret, int32_t op_errno, dict_t *dict,
dict_t *xdata);
/* Sets the blocks and size values to fixed values. This is to be called
* only for dirs. The caller is responsible for checking the type
*/
int32_t dht_set_fixed_dir_stat(struct iatt *stat) {
if (stat) {
stat->ia_blocks = DHT_DIR_STAT_BLOCKS;
stat->ia_size = DHT_DIR_STAT_SIZE;
return 0;
}
return -1;
}
/* Set both DHT_IATT_IN_XDATA_KEY and DHT_MODE_IN_XDATA_KEY
* Use DHT_MODE_IN_XDATA_KEY if available. Else fall back to
* DHT_IATT_IN_XDATA_KEY
*/
int dht_request_iatt_in_xdata(xlator_t *this, dict_t *xattr_req) {
int ret = -1;
ret = dict_set_int8(xattr_req, DHT_MODE_IN_XDATA_KEY, 1);
ret = dict_set_int8(xattr_req, DHT_IATT_IN_XDATA_KEY, 1);
/* At least one call succeeded */
return ret;
}
/* Get both DHT_IATT_IN_XDATA_KEY and DHT_MODE_IN_XDATA_KEY
* Use DHT_MODE_IN_XDATA_KEY if available, else fall back to
* DHT_IATT_IN_XDATA_KEY
* This will return a dummy iatt with only the mode and type set
*/
int dht_read_iatt_from_xdata(xlator_t *this, dict_t *xdata,
struct iatt *stbuf) {
int ret = -1;
int32_t mode = 0;
ret = dict_get_int32(xdata, DHT_MODE_IN_XDATA_KEY, &mode);
if (ret) {
ret = dict_get_bin(xdata, DHT_IATT_IN_XDATA_KEY, (void **)&stbuf);
} else {
stbuf->ia_prot = ia_prot_from_st_mode(mode);
stbuf->ia_type = ia_type_from_st_mode(mode);
}
return ret;
}
int dht_rmdir_unlock(call_frame_t *frame, xlator_t *this);
char *xattrs_to_heal[] = {"user.",
POSIX_ACL_ACCESS_XATTR,
POSIX_ACL_DEFAULT_XATTR,
QUOTA_LIMIT_KEY,
QUOTA_LIMIT_OBJECTS_KEY,
GF_SELINUX_XATTR_KEY,
NULL};
/* Return true if key exists in array
*/
static gf_boolean_t dht_match_xattr(const char *key) {
return gf_get_index_by_elem(xattrs_to_heal, (char *)key) >= 0;
}
int dht_aggregate_quota_xattr(dict_t *dst, char *key, data_t *value) {
int ret = -1;
quota_meta_t *meta_dst = NULL;
quota_meta_t *meta_src = NULL;
int64_t *size = NULL;
int64_t dst_dir_count = 0;
int64_t src_dir_count = 0;
if (value == NULL) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_DATA_NULL,
"data value is NULL");
ret = -1;
goto out;
}
ret = dict_get_bin(dst, key, (void **)&meta_dst);
if (ret < 0) {
meta_dst = GF_CALLOC(1, sizeof(quota_meta_t), gf_common_quota_meta_t);
if (meta_dst == NULL) {
gf_msg("dht", GF_LOG_WARNING, ENOMEM, DHT_MSG_NO_MEMORY,
"Memory allocation failed");
ret = -1;
goto out;
}
ret = dict_set_bin(dst, key, meta_dst, sizeof(quota_meta_t));
if (ret < 0) {
gf_msg("dht", GF_LOG_WARNING, EINVAL, DHT_MSG_DICT_SET_FAILED,
"dht aggregate dict set failed");
GF_FREE(meta_dst);
ret = -1;
goto out;
}
}
if (value->len > sizeof(int64_t)) {
meta_src = data_to_bin(value);
meta_dst->size =
hton64(ntoh64(meta_dst->size) + ntoh64(meta_src->size));
meta_dst->file_count =
hton64(ntoh64(meta_dst->file_count) + ntoh64(meta_src->file_count));
if (value->len > (2 * sizeof(int64_t))) {
dst_dir_count = ntoh64(meta_dst->dir_count);
src_dir_count = ntoh64(meta_src->dir_count);
if (src_dir_count > dst_dir_count)
meta_dst->dir_count = meta_src->dir_count;
} else {
meta_dst->dir_count = 0;
}
} else {
size = data_to_bin(value);
meta_dst->size = hton64(ntoh64(meta_dst->size) + ntoh64(*size));
}
ret = 0;
out:
return ret;
}
int add_opt(char **optsp, const char *opt) {
char *newopts = NULL;
unsigned oldsize = 0;
unsigned newsize = 0;
if (*optsp == NULL)
newopts = gf_strdup(opt);
else {
oldsize = strlen(*optsp);
newsize = oldsize + 1 + strlen(opt) + 1;
newopts = GF_REALLOC(*optsp, newsize);
if (newopts) sprintf(newopts + oldsize, ",%s", opt);
}
if (newopts == NULL) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY,
"Error to add choices in buffer in add_opt");
return -1;
}
*optsp = newopts;
return 0;
}
/* Return Choice list from Split brain status */
static char *getChoices(const char *value) {
int i = 0;
char *ptr = NULL;
char *tok = NULL;
char *result = NULL;
char *newval = NULL;
ptr = strstr(value, "Choices:");
if (!ptr) {
result = ptr;
goto out;
}
newval = gf_strdup(ptr);
if (!newval) {
result = newval;
goto out;
}
tok = strtok(newval, ":");
if (!tok) {
result = tok;
goto out;
}
while (tok) {
i++;
if (i == 2) break;
tok = strtok(NULL, ":");
}
result = gf_strdup(tok);
out:
if (newval) GF_FREE(newval);
return result;
}
/* This function prepare a list of choices for key
(replica.split-brain-status) in case of metadata split brain
only on the basis of key-value passed to this function.
After prepare the list of choices it update the same key in dict
with this value to reflect the same in
replica.split-brain-status attr for file.
*/
int dht_aggregate_split_brain_xattr(dict_t *dst, char *key, data_t *value) {
int ret = 0;
char *oldvalue = NULL;
char *old_choice = NULL;
char *new_choice = NULL;
char *full_choice = NULL;
char *status = NULL;
if (value == NULL) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_DATA_NULL,
"GF_AFR_SBRAIN_STATUS value is NULL");
ret = -1;
goto out;
}
ret = dict_get_str(dst, key, &oldvalue);
if (ret) goto out;
if (oldvalue && (strstr(oldvalue, "not"))) {
gf_msg_debug("dht", 0, "Need to update split-brain status in dict");
ret = -1;
goto out;
}
if (oldvalue && (strstr(oldvalue, "metadata-split-brain:yes")) &&
(strstr(oldvalue, "data-split-brain:no"))) {
if (strstr(value->data, "not")) {
gf_msg_debug("dht", 0, "No need to update split-brain status");
ret = 0;
goto out;
}
if (strstr(value->data, "yes") &&
(strncmp(oldvalue, value->data, strlen(oldvalue)))) {
old_choice = getChoices(oldvalue);
if (!old_choice) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY,
"Error to get choices");
ret = -1;
goto out;
}
ret = add_opt(&full_choice, old_choice);
if (ret) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY,
"Error to add choices");
ret = -1;
goto out;
}
new_choice = getChoices(value->data);
if (!new_choice) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY,
"Error to get choices");
ret = -1;
goto out;
}
ret = add_opt(&full_choice, new_choice);
if (ret) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY,
"Error to add choices ");
ret = -1;
goto out;
}
ret = gf_asprintf(&status,
"data-split-brain:%s "
"metadata-split-brain:%s Choices:%s",
"no", "yes", full_choice);
if (-1 == ret) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_NO_MEMORY,
"Error to prepare status ");
goto out;
}
ret = dict_set_dynstr(dst, key, status);
if (ret) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED,
"Failed to set full choice");
}
}
}
out:
if (old_choice) GF_FREE(old_choice);
if (new_choice) GF_FREE(new_choice);
if (full_choice) GF_FREE(full_choice);
return ret;
}
int dht_aggregate(dict_t *this, char *key, data_t *value, void *data) {
dict_t *dst = NULL;
int32_t ret = -1;
data_t *dict_data = NULL;
dst = data;
/* compare split brain xattr only */
if (strcmp(key, GF_AFR_SBRAIN_STATUS) == 0) {
ret = dht_aggregate_split_brain_xattr(dst, key, value);
if (!ret) goto out;
} else if (strcmp(key, QUOTA_SIZE_KEY) == 0) {
ret = dht_aggregate_quota_xattr(dst, key, value);
if (ret) {
gf_msg("dht", GF_LOG_WARNING, 0,
DHT_MSG_AGGREGATE_QUOTA_XATTR_FAILED,
"Failed to aggregate quota xattr");
}
goto out;
} else if (fnmatch(GF_XATTR_STIME_PATTERN, key, FNM_NOESCAPE) == 0) {
ret = gf_get_min_stime(THIS, dst, key, value);
goto out;
} else {
/* compare user xattrs only */
if (!strncmp(key, "user.", strlen("user."))) {
ret = dict_lookup(dst, key, &dict_data);
if (!ret && dict_data && value) {
ret = is_data_equal(dict_data, value);
if (!ret) gf_msg_debug("dht", 0, "xattr mismatch for %s", key);
}
}
}
ret = dict_set(dst, key, value);
if (ret) {
gf_msg("dht", GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED,
"Failed to set dictionary value: key = %s", key);
}
out:
return ret;
}
void dht_aggregate_xattr(dict_t *dst, dict_t *src) {
if ((dst == NULL) || (src == NULL)) {
goto out;
}
dict_foreach(src, dht_aggregate, dst);
out:
return;
}
/* Code to save hashed subvol on inode ctx as a mds subvol
*/
int dht_inode_ctx_mdsvol_set(inode_t *inode, xlator_t *this,
xlator_t *mds_subvol) {
dht_inode_ctx_t *ctx = NULL;
int ret = -1;
uint64_t ctx_int = 0;
gf_boolean_t ctx_free = _gf_false;
LOCK(&inode->lock);
{
ret = __inode_ctx_get(inode, this, &ctx_int);
if (ctx_int) {
ctx = (dht_inode_ctx_t *)ctx_int;
ctx->mds_subvol = mds_subvol;
} else {
ctx = GF_CALLOC(1, sizeof(*ctx), gf_dht_mt_inode_ctx_t);
if (!ctx) goto unlock;
ctx->mds_subvol = mds_subvol;
ctx_free = _gf_true;
ctx_int = (long)ctx;
ret = __inode_ctx_set(inode, this, &ctx_int);
}
}
unlock:
UNLOCK(&inode->lock);
if (ret && ctx_free) GF_FREE(ctx);
return ret;
}
/*Code to get mds subvol from inode ctx */
int dht_inode_ctx_mdsvol_get(inode_t *inode, xlator_t *this,
xlator_t **mdsvol) {
dht_inode_ctx_t *ctx = NULL;
int ret = -1;
if (!mdsvol) return ret;
if (__is_root_gfid(inode->gfid)) {
(*mdsvol) = FIRST_CHILD(this);
return 0;
}
ret = dht_inode_ctx_get(inode, this, &ctx);
if (!ret && ctx) {
if (ctx->mds_subvol) {
*mdsvol = ctx->mds_subvol;
ret = 0;
} else {
ret = -1;
}
}
return ret;
}
/* TODO:
- use volumename in xattr instead of "dht"
- use NS locks
- handle all cases in self heal layout reconstruction
- complete linkfile selfheal
*/
int dht_lookup_selfheal_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
int op_ret, int op_errno, dict_t *xdata) {
dht_local_t *local = NULL;
dht_layout_t *layout = NULL;
dht_conf_t *conf = NULL;
int ret = -1;
GF_VALIDATE_OR_GOTO("dht", frame, out);
GF_VALIDATE_OR_GOTO("dht", this, out);
GF_VALIDATE_OR_GOTO("dht", frame->local, out);
local = frame->local;
conf = this->private;
ret = op_ret;
FRAME_SU_UNDO(frame, dht_local_t);
if (ret == 0) {
layout = local->selfheal.layout;
ret = dht_layout_set(this, local->inode, layout);
}
dht_inode_ctx_time_update(local->inode, this, &local->stbuf, 1);
if (local->loc.parent) {
dht_inode_ctx_time_update(local->loc.parent, this, &local->postparent,
1);
}
DHT_STRIP_PHASE1_FLAGS(&local->stbuf);
dht_set_fixed_dir_stat(&local->postparent);
/* Delete mds xattr at the time of STACK UNWIND */
GF_REMOVE_INTERNAL_XATTR(conf->mds_xattr_key, local->xattr);
DHT_STACK_UNWIND(lookup, frame, ret, local->op_errno, local->inode,
&local->stbuf, local->xattr, &local->postparent);
out:
return ret;
}
int dht_discover_complete(xlator_t *this, call_frame_t *discover_frame) {
dht_local_t *local = NULL;
dht_local_t *heal_local = NULL;
call_frame_t *main_frame = NULL;
call_frame_t *heal_frame = NULL;
int op_errno = 0;
int ret = -1;
dht_layout_t *layout = NULL;
dht_conf_t *conf = NULL;
uint32_t vol_commit_hash = 0;
xlator_t *source = NULL;
int heal_path = 0;
int error_while_marking_mds = 0;
int i = 0;
loc_t loc = {0};
int8_t is_read_only = 0, layout_anomalies = 0;
char gfid_local[GF_UUID_BUF_SIZE] = {0};
local = discover_frame->local;
layout = local->layout;
conf = this->private;
gf_uuid_unparse(local->gfid, gfid_local);
LOCK(&discover_frame->lock);
{
main_frame = local->main_frame;
local->main_frame = NULL;
}
UNLOCK(&discover_frame->lock);
if (!main_frame) return 0;
/* Code to update all extended attributed from
subvol to local->xattr on that internal xattr has found
*/
if (conf->subvolume_cnt == 1) local->need_xattr_heal = 0;
if (local->need_xattr_heal && (local->mds_xattr)) {
dht_dir_set_heal_xattr(this, local, local->xattr, local->mds_xattr,
NULL, NULL);
dict_unref(local->mds_xattr);
local->mds_xattr = NULL;
}
ret = dict_get_int8(local->xattr_req, QUOTA_READ_ONLY_KEY, &is_read_only);
if (ret < 0)
gf_msg_debug(this->name, 0, "key = %s not present in dict",
QUOTA_READ_ONLY_KEY);
if (local->file_count && local->dir_count) {
gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_FILE_TYPE_MISMATCH,
"path %s exists as a file on one subvolume "
"and directory on another. "
"Please fix it manually",
local->loc.path);
op_errno = EIO;
goto out;
}
if (local->cached_subvol) {
ret = dht_layout_preset(this, local->cached_subvol, local->inode);
if (ret < 0) {
gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_LAYOUT_SET_FAILED,
"failed to set layout for subvolume %s",
local->cached_subvol ? local->cached_subvol->name : "<nil>");
op_errno = EINVAL;
goto out;
}
} else {
ret = dht_layout_normalize(this, &local->loc, layout);
if ((ret < 0) || ((ret > 0) && (local->op_ret != 0))) {
/* either the layout is incorrect or the directory is
* not found even in one subvolume.
*/
gf_msg_debug(this->name, 0,
"normalizing failed on %s "
"(overlaps/holes present: %s, "
"ENOENT errors: %d)",
local->loc.path, (ret < 0) ? "yes" : "no",
(ret > 0) ? ret : 0);
layout_anomalies = 1;
} else if (local->inode) {
dht_layout_set(this, local->inode, layout);
}
}
if (!conf->vch_forced) {
ret = dict_get_uint32(local->xattr, conf->commithash_xattr_name,
&vol_commit_hash);
if (ret == 0) {
conf->vol_commit_hash = vol_commit_hash;
}
}
if (IA_ISDIR(local->stbuf.ia_type) && !is_read_only) {
for (i = 0; i < layout->cnt; i++) {
if (!source && !layout->list[i].err)
source = layout->list[i].xlator;
if (layout->list[i].err == ENOENT ||
layout->list[i].err == ESTALE) {
heal_path = 1;
}
if (source && heal_path) break;
}
}
if (IA_ISDIR(local->stbuf.ia_type)) {
/* Call function to save hashed subvol on inode ctx if
internal mds xattr is not present and all subvols are up
*/
if (!local->op_ret && !__is_root_gfid(local->stbuf.ia_gfid))
(void)dht_common_mark_mdsxattr(discover_frame,
&error_while_marking_mds, 1);
if (local->need_xattr_heal && !heal_path) {
local->need_xattr_heal = 0;
ret = dht_dir_xattr_heal(this, local);
if (ret)
gf_msg(this->name, GF_LOG_ERROR, ret,
DHT_MSG_DIR_XATTR_HEAL_FAILED,
"xattr heal failed for "
"directory gfid is %s ",
gfid_local);
}
}
if (source && (heal_path || layout_anomalies || error_while_marking_mds)) {
gf_uuid_copy(loc.gfid, local->gfid);
if (gf_uuid_is_null(loc.gfid)) {
goto done;
}
if (local->inode)
loc.inode = inode_ref(local->inode);
else
goto done;
heal_frame = create_frame(this, this->ctx->pool);
if (heal_frame) {
heal_local = dht_local_init(heal_frame, &loc, NULL, 0);
if (!heal_local) goto cleanup;
gf_uuid_copy(heal_local->gfid, local->gfid);
heal_frame->cookie = source;
heal_local->xattr = dict_ref(local->xattr);
heal_local->stbuf = local->stbuf;
heal_local->postparent = local->postparent;
heal_local->inode = inode_ref(loc.inode);
heal_local->main_frame = main_frame;
FRAME_SU_DO(heal_frame, dht_local_t);
ret = synctask_new(this->ctx->env, dht_heal_full_path,
dht_heal_full_path_done, heal_frame, heal_frame);
if (!ret) {
loc_wipe(&loc);
return 0;
}
/*
* Failed to spawn the synctask. Returning
* with out doing heal.
*/
cleanup:
loc_wipe(&loc);
DHT_STACK_DESTROY(heal_frame);
}
}
done:
dht_set_fixed_dir_stat(&local->postparent);
/* Delete mds xattr at the time of STACK UNWIND */
GF_REMOVE_INTERNAL_XATTR(conf->mds_xattr_key, local->xattr);
DHT_STACK_UNWIND(lookup, main_frame, local->op_ret, local->op_errno,
local->inode, &local->stbuf, local->xattr,
&local->postparent);
return 0;
out:
DHT_STACK_UNWIND(lookup, main_frame, -1, op_errno, NULL, NULL, NULL, NULL);
return ret;
}
int dht_common_mark_mdsxattr_cbk(call_frame_t *frame, void *cookie,
xlator_t *this, int op_ret, int op_errno,
dict_t *xdata) {
dht_local_t *local = NULL;
xlator_t *prev = cookie;
int ret = -1;
dht_conf_t *conf = 0;
dht_layout_t *layout = NULL;
GF_VALIDATE_OR_GOTO(this->name, frame, out);
GF_VALIDATE_OR_GOTO(this->name, frame->local, out);
local = frame->local;
conf = this->private;
layout = local->selfheal.layout;
if (op_ret) {
gf_msg_debug(this->name, op_ret,
"Failed to set %s on the MDS %s for path %s. ",
conf->mds_xattr_key, prev->name, local->loc.path);
} else {
/* Save mds subvol on inode ctx */
ret = dht_inode_ctx_mdsvol_set(local->inode, this, prev);
if (ret) {
gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_SET_INODE_CTX_FAILED,
"Failed to set mds subvol on inode ctx"
" %s for %s ",
prev->name, local->loc.path);
}
}
if (!local->mds_heal_fresh_lookup && layout) {
dht_selfheal_dir_setattr(frame, &local->loc, &local->stbuf, 0xffffffff,
layout);
}
out:
if (local && local->mds_heal_fresh_lookup) DHT_STACK_DESTROY(frame);
return 0;
}
/* Common function call by revalidate/selfheal code path to populate
internal xattr if it is not present, mark_during_fresh_lookup value
determines either function is call by revalidate_cbk(discover_complete)
or call by selfheal code path while fresh lookup.
Here we do wind a call serially in case of fresh lookup and
for other lookup code path we do wind a call parallel.The reason
to wind a call serially is at the time of fresh lookup directory is not
discovered and at the time of revalidate_lookup directory is
already discovered. So, revalidate codepath can race with setxattr
codepath and can get into spurious heals because of an ongoing setxattr.
This can slow down revalidates, if healing happens in foreground.
However, if healing happens in background, there is no direct performance
penalty.
*/
int dht_common_mark_mdsxattr(call_frame_t *frame, int *errst,
int mark_during_fresh_lookup) {
dht_local_t *local = NULL;
xlator_t *this = NULL;
xlator_t *hashed_subvol = NULL;
int ret = 0;
int i = 0;
dict_t *xattrs = NULL;
char gfid_local[GF_UUID_BUF_SIZE] = {
0,
};
int32_t zero[1] = {0};
dht_conf_t *conf = 0;
dht_layout_t *layout = NULL;
dht_local_t *copy_local = NULL;
call_frame_t *xattr_frame = NULL;
gf_boolean_t vol_down = _gf_false;
this = frame->this;
GF_VALIDATE_OR_GOTO("dht", frame, out);
GF_VALIDATE_OR_GOTO("dht", this, out);
GF_VALIDATE_OR_GOTO(this->name, frame->local, out);
GF_VALIDATE_OR_GOTO(this->name, this->private, out);
local = frame->local;
conf = this->private;
layout = local->selfheal.layout;
local->mds_heal_fresh_lookup = mark_during_fresh_lookup;
gf_uuid_unparse(local->gfid, gfid_local);
/* Code to update hashed subvol consider as a mds subvol
and wind a setxattr call on hashed subvol to update
internal xattr
*/
if (!dict_get(local->xattr, conf->mds_xattr_key)) {
/* It means no internal MDS xattr has been set yet
*/
/* Check the status of all subvol are up while call
this function call by lookup code path
*/
if (mark_during_fresh_lookup) {
for (i = 0; i < conf->subvolume_cnt; i++) {
if (!conf->subvolume_status[i]) {
vol_down = _gf_true;
break;
}
}
if (vol_down) {
gf_msg_debug(this->name, 0,
"subvol %s is down. Unable to "
" save mds subvol on inode for "
" path %s gfid is %s ",
conf->subvolumes[i]->name, local->loc.path,
gfid_local);
goto out;
}
}
/* Calculate hashed subvol based on inode and parent node
*/
hashed_subvol =
dht_inode_get_hashed_subvol(local->inode, this, &local->loc);
if (!hashed_subvol) {
gf_msg(this->name, GF_LOG_DEBUG, 0,
DHT_MSG_HASHED_SUBVOL_GET_FAILED,
"Failed to get hashed subvol for path %s"
"gfid is %s ",
local->loc.path, gfid_local);
(*errst) = 1;
ret = -1;
goto out;
}
xattrs = dict_new();
if (!xattrs) {
gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY,
"dict_new failed");
ret = -1;
goto out;
}
/* Add internal MDS xattr on disk for hashed subvol
*/
ret = dht_dict_set_array(xattrs, conf->mds_xattr_key, zero, 1);
if (ret) {
gf_msg(this->name, GF_LOG_WARNING, ENOMEM, DHT_MSG_DICT_SET_FAILED,
"Failed to set dictionary"
" value:key = %s for "
"path %s",
conf->mds_xattr_key, local->loc.path);
ret = -1;
goto out;
}
/* Create a new frame to wind a call only while
this function call by revalidate_cbk code path
To wind a call parallel need to create a new frame
*/
if (mark_during_fresh_lookup) {
xattr_frame = create_frame(this, this->ctx->pool);
if (!xattr_frame) {
ret = -1;
goto out;
}
copy_local = dht_local_init(xattr_frame, &(local->loc), NULL, 0);
if (!copy_local) {
ret = -1;
DHT_STACK_DESTROY(xattr_frame);
goto out;
}
copy_local->stbuf = local->stbuf;
copy_local->mds_heal_fresh_lookup = mark_during_fresh_lookup;
if (!copy_local->inode) copy_local->inode = inode_ref(local->inode);
gf_uuid_copy(copy_local->loc.gfid, local->gfid);
FRAME_SU_DO(xattr_frame, dht_local_t);
STACK_WIND_COOKIE(xattr_frame, dht_common_mark_mdsxattr_cbk,
hashed_subvol, hashed_subvol,
hashed_subvol->fops->setxattr, &local->loc,
xattrs, 0, NULL);
} else {
STACK_WIND_COOKIE(frame, dht_common_mark_mdsxattr_cbk,
(void *)hashed_subvol, hashed_subvol,
hashed_subvol->fops->setxattr, &local->loc,
xattrs, 0, NULL);
}
} else {
gf_msg_debug(this->name, 0,
"internal xattr %s is present on subvol"
"on path %s gfid is %s ",
conf->mds_xattr_key, local->loc.path, gfid_local);
if (!mark_during_fresh_lookup)
dht_selfheal_dir_setattr(frame, &local->loc, &local->stbuf,
0xffffffff, layout);
}
out:
if (xattrs) dict_unref(xattrs);
return ret;
}
int dht_discover_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
int op_ret, int op_errno, inode_t *inode,
struct iatt *stbuf, dict_t *xattr,
struct iatt *postparent) {
dht_local_t *local = NULL;
int this_call_cnt = 0;
xlator_t *prev = NULL;
dht_layout_t *layout = NULL;
int ret = -1;
int is_dir = 0;
int32_t check_mds = 0;
int is_linkfile = 0;
int attempt_unwind = 0;
dht_conf_t *conf = 0;
char gfid_local[GF_UUID_BUF_SIZE] = {0};
char gfid_node[GF_UUID_BUF_SIZE] = {0};
int32_t mds_xattr_val[1] = {0};
int errst = 0;
GF_VALIDATE_OR_GOTO("dht", frame, out);
GF_VALIDATE_OR_GOTO("dht", this, out);
GF_VALIDATE_OR_GOTO("dht", frame->local, out);
GF_VALIDATE_OR_GOTO("dht", this->private, out);
GF_VALIDATE_OR_GOTO("dht", cookie, out);
local = frame->local;
prev = cookie;
conf = this->private;
layout = local->layout;
/* Check if the gfid is different for file from other node */
if (!op_ret && gf_uuid_compare(local->gfid, stbuf->ia_gfid)) {
gf_uuid_unparse(stbuf->ia_gfid, gfid_node);
gf_uuid_unparse(local->gfid, gfid_local);
gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_GFID_MISMATCH,
"%s: gfid different on %s, gfid local = %s"
"gfid other = %s",
local->loc.path, prev->name, gfid_local, gfid_node);
}
LOCK(&frame->lock);
{
/* TODO: assert equal mode on stbuf->st_mode and
local->stbuf->st_mode
else mkdir/chmod/chown and fix
*/
ret = dht_layout_merge(this, layout, prev, op_ret, op_errno, xattr);
if (ret)
gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_LAYOUT_MERGE_FAILED,
"%s: failed to merge layouts for subvol %s", local->loc.path,
prev->name);
if (op_ret == -1) {
local->op_errno = op_errno;
gf_msg_debug(this->name, op_errno,
"lookup of %s on %s returned error", local->loc.path,
prev->name);
goto unlock;
}
is_linkfile =
check_is_linkfile(inode, stbuf, xattr, conf->link_xattr_name);
is_dir = check_is_dir(inode, stbuf, xattr);
if (is_dir) {
local->dir_count++;
} else {
local->file_count++;
if (!is_linkfile && !local->cached_subvol) {
/* real file */
/* Ok, we somehow managed to find a file on
* more than one subvol. ignore this or we
* will end up overwriting information while a
* a thread is potentially unwinding from
* dht_discover_complete
*/
local->cached_subvol = prev;
attempt_unwind = 1;
} else {
goto unlock;
}
}
local->op_ret = 0;
if (local->xattr == NULL) {
local->xattr = dict_ref(xattr);
} else {
/* Don't aggregate for files. See BZ#1484113 */
if (is_dir) dht_aggregate_xattr(local->xattr, xattr);
}
if (local->inode == NULL) local->inode = inode_ref(inode);
dht_iatt_merge(this, &local->stbuf, stbuf, prev);
dht_iatt_merge(this, &local->postparent, postparent, prev);
if (!dict_get(xattr, conf->mds_xattr_key)) {
goto unlock;
} else {
gf_msg_debug(this->name, 0,
"internal xattr %s is present on subvol"
"on path %s gfid is %s ",
conf->mds_xattr_key, local->loc.path, gfid_local);
}
check_mds = dht_dict_get_array(xattr, conf->mds_xattr_key,
mds_xattr_val, 1, &errst);
/* save mds subvol on inode ctx */
ret = dht_inode_ctx_mdsvol_set(local->inode, this, prev);
if (ret) {
gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_SET_INODE_CTX_FAILED,
"Failed to set hashed subvol for %s vol is %s",
local->loc.path, prev->name);
}
if ((check_mds < 0) && !errst) {
local->mds_xattr = dict_ref(xattr);
gf_msg_debug(this->name, 0,
"Value of %s is not zero on mds subvol"
"so xattr needs to be healed on non mds"
" path is %s and vol name is %s "
" gfid is %s",
conf->mds_xattr_key, local->loc.path, prev->name,
gfid_local);
local->need_xattr_heal = 1;
local->mds_subvol = prev;
}
}
unlock:
UNLOCK(&frame->lock);
out:
/* Make sure, the thread executing dht_discover_complete is the one
* which calls STACK_DESTROY (frame). In the case of "attempt_unwind",
* this makes sure that the thread don't call dht_frame_return, till
* call to dht_discover_complete is done.
*/
if (attempt_unwind) {
dht_discover_complete(this, frame);