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|
/*
Copyright (c) 2010-2011 Gluster, Inc. <http://www.gluster.com>
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
<http://www.gnu.org/licenses/>.
*/
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "afr.h"
#include "syncop.h"
#include "afr-self-heald.h"
#include "afr-self-heal-common.h"
#include "protocol-common.h"
#include "event-history.h"
#define AFR_POLL_TIMEOUT 600
typedef enum {
STOP_CRAWL_ON_SINGLE_SUBVOL = 1
} afr_crawl_flags_t;
typedef enum {
HEAL = 1,
INFO
} shd_crawl_op;
typedef struct shd_dump {
dict_t *dict;
time_t sh_time;
xlator_t *this;
int child;
} shd_dump_t;
typedef struct shd_event_ {
int child;
char *path;
} shd_event_t;
typedef struct shd_pos_ {
int child;
xlator_t *this;
afr_child_pos_t pos;
} shd_pos_t;
typedef int
(*afr_crawl_done_cbk_t) (int ret, call_frame_t *sync_frame, void *crawl_data);
void
afr_start_crawl (xlator_t *this, int idx, afr_crawl_type_t crawl,
process_entry_cbk_t process_entry, void *op_data,
gf_boolean_t exclusive, int crawl_flags,
afr_crawl_done_cbk_t crawl_done);
static int
_crawl_directory (fd_t *fd, loc_t *loc, afr_crawl_data_t *crawl_data);
int
afr_syncop_find_child_position (void *data);
void
shd_cleanup_event (void *event)
{
shd_event_t *shd_event = event;
if (!shd_event)
goto out;
if (shd_event->path)
GF_FREE (shd_event->path);
GF_FREE (shd_event);
out:
return;
}
int
afr_get_local_child (afr_self_heald_t *shd, unsigned int child_count)
{
int i = 0;
int ret = -1;
for (i = 0; i < child_count; i++) {
if (shd->pos[i] == AFR_POS_LOCAL) {
ret = i;
break;
}
}
return ret;
}
static int
_build_index_loc (xlator_t *this, loc_t *loc, char *name, loc_t *parent)
{
int ret = 0;
uuid_copy (loc->pargfid, parent->inode->gfid);
loc->path = "";
loc->name = name;
loc->parent = inode_ref (parent->inode);
if (!loc->parent) {
loc->path = NULL;
loc_wipe (loc);
ret = -1;
}
return ret;
}
int
_add_str_to_dict (xlator_t *this, dict_t *output, int child, char *str,
gf_boolean_t dyn)
{
//subkey not used for now
int ret = -1;
uint64_t count = 0;
char key[256] = {0};
int xl_id = 0;
ret = dict_get_int32 (output, this->name, &xl_id);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "xl does not have id");
goto out;
}
snprintf (key, sizeof (key), "%d-%d-count", xl_id, child);
ret = dict_get_uint64 (output, key, &count);
snprintf (key, sizeof (key), "%d-%d-%"PRIu64, xl_id, child, count);
if (dyn)
ret = dict_set_dynstr (output, key, str);
else
ret = dict_set_str (output, key, str);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "%s: Could not add to output",
str);
goto out;
}
snprintf (key, sizeof (key), "%d-%d-count", xl_id, child);
ret = dict_set_uint64 (output, key, count + 1);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "Could not increment count");
goto out;
}
ret = 0;
out:
return ret;
}
int
_get_path_from_gfid_loc (xlator_t *this, xlator_t *readdir_xl, loc_t *child,
char **fpath)
{
dict_t *xattr = NULL;
char *path = NULL;
int ret = -1;
ret = syncop_getxattr (readdir_xl, child, &xattr,
GFID_TO_PATH_KEY);
if (ret)
goto out;
ret = dict_get_str (xattr, GFID_TO_PATH_KEY, &path);
if (ret) {
gf_log (this->name, GF_LOG_DEBUG, "Failed to get path for "
"gfid %s", uuid_utoa (child->gfid));
goto out;
}
path = gf_strdup (path);
if (!path) {
ret = -1;
goto out;
}
ret = 0;
out:
if (!ret)
*fpath = path;
if (xattr)
dict_unref (xattr);
return ret;
}
int
_add_event_to_dict (circular_buffer_t *cb, void *data)
{
int ret = 0;
shd_dump_t *dump_data = NULL;
shd_event_t *shd_event = NULL;
dump_data = data;
shd_event = cb->data;
if (shd_event->child != dump_data->child)
goto out;
if (cb->tv.tv_sec >= dump_data->sh_time)
ret = _add_str_to_dict (dump_data->this, dump_data->dict,
dump_data->child, shd_event->path,
_gf_false);
out:
return ret;
}
int
_add_eh_to_dict (xlator_t *this, eh_t *eh, dict_t *dict, time_t sh_time,
int child)
{
shd_dump_t dump_data = {0};
dump_data.this = this;
dump_data.dict = dict;
dump_data.sh_time = sh_time;
dump_data.child = child;
eh_dump (eh, &dump_data, _add_event_to_dict);
return 0;
}
int
_add_summary_to_dict (xlator_t *this, afr_crawl_data_t *crawl_data,
gf_dirent_t *entry,
loc_t *childloc, loc_t *parentloc, struct iatt *iattr)
{
dict_t *output = NULL;
xlator_t *readdir_xl = NULL;
int ret = -1;
char *path = NULL;
if (uuid_is_null (childloc->gfid))
goto out;
output = crawl_data->op_data;
readdir_xl = crawl_data->readdir_xl;
ret = _get_path_from_gfid_loc (this, readdir_xl, childloc, &path);
if (ret)
goto out;
ret = _add_str_to_dict (this, output, crawl_data->child, path,
_gf_true);
out:
if (ret && path)
GF_FREE (path);
return ret;
}
void
_remove_stale_index (xlator_t *this, xlator_t *readdir_xl,
loc_t *parent, char *fname)
{
int ret = 0;
loc_t index_loc = {0};
ret = _build_index_loc (this, &index_loc, fname, parent);
if (ret)
goto out;
gf_log (this->name, GF_LOG_INFO, "Removing stale index "
"for %s on %s", index_loc.name, readdir_xl->name);
ret = syncop_unlink (readdir_xl, &index_loc);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "%s: Failed to remove"
" index on %s - %s", index_loc.name,
readdir_xl->name, strerror (errno));
}
index_loc.path = NULL;
loc_wipe (&index_loc);
out:
return;
}
void
_crawl_post_sh_action (xlator_t *this, loc_t *parent, loc_t *child,
int32_t op_ret, int32_t op_errno, dict_t *xattr_rsp,
afr_crawl_data_t *crawl_data)
{
int ret = 0;
afr_private_t *priv = NULL;
afr_self_heald_t *shd = NULL;
eh_t *eh = NULL;
char *path = NULL;
shd_event_t *event = NULL;
int32_t sh_failed = 0;
gf_boolean_t split_brain = 0;
priv = this->private;
shd = &priv->shd;
if (crawl_data->crawl == INDEX) {
if ((op_ret < 0) && (op_errno == ENOENT)) {
_remove_stale_index (this, crawl_data->readdir_xl,
parent, uuid_utoa (child->gfid));
goto out;
}
ret = _get_path_from_gfid_loc (this, crawl_data->readdir_xl,
child, &path);
if (ret)
goto out;
} else {
path = gf_strdup (child->path);
if (!path) {
ret = -1;
goto out;
}
}
if (xattr_rsp)
ret = dict_get_int32 (xattr_rsp, "sh-failed", &sh_failed);
split_brain = afr_is_split_brain (this, child->inode);
if ((op_ret < 0 && op_errno == EIO) || split_brain)
eh = shd->split_brain;
else if ((op_ret < 0) || sh_failed)
eh = shd->heal_failed;
else
eh = shd->healed;
ret = -1;
event = GF_CALLOC (1, sizeof (*event), gf_afr_mt_shd_event_t);
if (!event)
goto out;
event->child = crawl_data->child;
event->path = path;
ret = eh_save_history (eh, event);
if (ret < 0) {
gf_log (this->name, GF_LOG_ERROR, "%s:Failed to save to "
"eh, (%d, %s)", path, op_ret, strerror (op_errno));
goto out;
}
ret = 0;
out:
if (ret && path)
GF_FREE (path);
return;
}
int
_self_heal_entry (xlator_t *this, afr_crawl_data_t *crawl_data, gf_dirent_t *entry,
loc_t *child, loc_t *parent, struct iatt *iattr)
{
struct iatt parentbuf = {0};
int ret = 0;
dict_t *xattr_rsp = NULL;
if (uuid_is_null (child->gfid))
gf_log (this->name, GF_LOG_DEBUG, "lookup %s", child->path);
else
gf_log (this->name, GF_LOG_DEBUG, "lookup %s",
uuid_utoa (child->gfid));
ret = syncop_lookup (this, child, NULL,
iattr, &xattr_rsp, &parentbuf);
_crawl_post_sh_action (this, parent, child, ret, errno, xattr_rsp,
crawl_data);
if (xattr_rsp)
dict_unref (xattr_rsp);
return ret;
}
static int
afr_crawl_done (int ret, call_frame_t *sync_frame, void *data)
{
GF_FREE (data);
STACK_DESTROY (sync_frame->root);
return 0;
}
void
_do_self_heal_on_subvol (xlator_t *this, int child, afr_crawl_type_t crawl)
{
afr_private_t *priv = NULL;
afr_self_heald_t *shd = NULL;
priv = this->private;
shd = &priv->shd;
time (&shd->sh_times[child]);
afr_start_crawl (this, child, crawl, _self_heal_entry,
NULL, _gf_true, STOP_CRAWL_ON_SINGLE_SUBVOL,
afr_crawl_done);
}
gf_boolean_t
_crawl_proceed (xlator_t *this, int child, int crawl_flags, char **reason)
{
afr_private_t *priv = NULL;
afr_self_heald_t *shd = NULL;
gf_boolean_t proceed = _gf_false;
char *msg = NULL;
priv = this->private;
shd = &priv->shd;
if (!shd->enabled) {
msg = "Self-heal daemon is not enabled";
gf_log (this->name, GF_LOG_ERROR, msg);
goto out;
}
if (!priv->child_up[child]) {
gf_log (this->name, GF_LOG_ERROR, "Stopping crawl for %s , "
"subvol went down", priv->children[child]->name);
msg = "Brick is Not connected";
goto out;
}
if (crawl_flags & STOP_CRAWL_ON_SINGLE_SUBVOL) {
if (afr_up_children_count (priv->child_up,
priv->child_count) < 2) {
gf_log (this->name, GF_LOG_ERROR, "Stopping crawl as "
"< 2 children are up");
msg = "< 2 bricks in replica are running";
goto out;
}
}
proceed = _gf_true;
out:
if (reason)
*reason = msg;
return proceed;
}
int
_do_crawl_op_on_local_subvols (xlator_t *this, afr_crawl_type_t crawl,
shd_crawl_op op, dict_t *output)
{
afr_private_t *priv = NULL;
char *status = NULL;
char *subkey = NULL;
char key[256] = {0};
shd_pos_t pos_data = {0};
int op_ret = -1;
int xl_id = -1;
int i = 0;
int ret = 0;
int crawl_flags = 0;
priv = this->private;
if (op == HEAL)
crawl_flags |= STOP_CRAWL_ON_SINGLE_SUBVOL;
ret = dict_get_int32 (output, this->name, &xl_id);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "Invalid input, "
"translator-id is not available");
goto out;
}
pos_data.this = this;
subkey = "status";
for (i = 0; i < priv->child_count; i++) {
if (_crawl_proceed (this, i, crawl_flags, &status)) {
pos_data.child = i;
ret = synctask_new (this->ctx->env,
afr_syncop_find_child_position,
NULL, NULL, &pos_data);
if (ret) {
status = "Not able to find brick location";
} else if (pos_data.pos == AFR_POS_REMOTE) {
status = "brick is remote";
} else {
op_ret = 0;
if (op == HEAL) {
status = "Started self-heal";
_do_self_heal_on_subvol (this, i,
crawl);
} else {
status = "";
afr_start_crawl (this, i, INDEX,
_add_summary_to_dict,
output, _gf_false, 0,
NULL);
}
}
snprintf (key, sizeof (key), "%d-%d-%s", xl_id,
i, subkey);
ret = dict_set_str (output, key, status);
if (!op_ret && (crawl == FULL))
break;
}
snprintf (key, sizeof (key), "%d-%d-%s", xl_id, i, subkey);
ret = dict_set_str (output, key, status);
}
out:
return op_ret;
}
int
_do_self_heal_on_local_subvols (xlator_t *this, afr_crawl_type_t crawl,
dict_t *output)
{
return _do_crawl_op_on_local_subvols (this, crawl, HEAL, output);
}
int
_get_index_summary_on_local_subvols (xlator_t *this, dict_t *output)
{
return _do_crawl_op_on_local_subvols (this, INDEX, INFO, output);
}
int
_add_all_subvols_eh_to_dict (xlator_t *this, eh_t *eh, dict_t *dict)
{
afr_private_t *priv = NULL;
afr_self_heald_t *shd = NULL;
int i = 0;
priv = this->private;
shd = &priv->shd;
for (i = 0; i < priv->child_count; i++) {
if (shd->pos[i] != AFR_POS_LOCAL)
continue;
_add_eh_to_dict (this, eh, dict, shd->sh_times[i], i);
}
return 0;
}
int
afr_xl_op (xlator_t *this, dict_t *input, dict_t *output)
{
gf_xl_afr_op_t op = GF_AFR_OP_INVALID;
int ret = 0;
afr_private_t *priv = NULL;
afr_self_heald_t *shd = NULL;
int xl_id = 0;
priv = this->private;
shd = &priv->shd;
ret = dict_get_int32 (input, "xl-op", (int32_t*)&op);
if (ret)
goto out;
ret = dict_get_int32 (input, this->name, &xl_id);
if (ret)
goto out;
ret = dict_set_int32 (output, this->name, xl_id);
if (ret)
goto out;
switch (op) {
case GF_AFR_OP_HEAL_INDEX:
ret = _do_self_heal_on_local_subvols (this, INDEX, output);
break;
case GF_AFR_OP_HEAL_FULL:
ret = _do_self_heal_on_local_subvols (this, FULL, output);
break;
case GF_AFR_OP_INDEX_SUMMARY:
ret = _get_index_summary_on_local_subvols (this, output);
break;
case GF_AFR_OP_HEALED_FILES:
ret = _add_all_subvols_eh_to_dict (this, shd->healed, output);
break;
case GF_AFR_OP_HEAL_FAILED_FILES:
ret = _add_all_subvols_eh_to_dict (this, shd->heal_failed,
output);
break;
case GF_AFR_OP_SPLIT_BRAIN_FILES:
ret = _add_all_subvols_eh_to_dict (this, shd->split_brain,
output);
break;
default:
gf_log (this->name, GF_LOG_ERROR, "Unknown set op %d", op);
break;
}
out:
dict_del (output, this->name);
return ret;
}
void
afr_poll_self_heal (void *data)
{
afr_private_t *priv = NULL;
afr_self_heald_t *shd = NULL;
struct timeval timeout = {0};
xlator_t *this = NULL;
long child = (long)data;
gf_timer_t *old_timer = NULL;
gf_timer_t *new_timer = NULL;
this = THIS;
priv = this->private;
shd = &priv->shd;
_do_self_heal_on_subvol (this, child, INDEX);
timeout.tv_sec = AFR_POLL_TIMEOUT;
timeout.tv_usec = 0;
//notify and previous timer should be synchronized.
LOCK (&priv->lock);
{
old_timer = shd->timer[child];
shd->timer[child] = gf_timer_call_after (this->ctx, timeout,
afr_poll_self_heal,
data);
new_timer = shd->timer[child];
}
UNLOCK (&priv->lock);
if (old_timer)
gf_timer_call_cancel (this->ctx, old_timer);
if (!new_timer) {
gf_log (this->name, GF_LOG_WARNING,
"Could not create self-heal polling timer for %s",
priv->children[child]->name);
}
return;
}
static int
afr_local_child_poll_self_heal (int ret, call_frame_t *sync_frame, void *data)
{
afr_self_heald_t *shd = NULL;
shd_pos_t *pos_data = data;
afr_private_t *priv = NULL;
if (ret)
goto out;
priv = pos_data->this->private;
shd = &priv->shd;
shd->pos[pos_data->child] = pos_data->pos;
if (pos_data->pos == AFR_POS_LOCAL)
afr_poll_self_heal ((void*)(long)pos_data->child);
out:
GF_FREE (data);
return 0;
}
void
afr_proactive_self_heal (void *data)
{
xlator_t *this = NULL;
long child = (long)data;
shd_pos_t *pos_data = NULL;
int ret = 0;
this = THIS;
//Position of brick could have changed and it could be local now.
//Compute the position again
pos_data = GF_CALLOC (1, sizeof (*pos_data), gf_afr_mt_pos_data_t);
if (!pos_data)
goto out;
pos_data->this = this;
pos_data->child = child;
ret = synctask_new (this->ctx->env, afr_syncop_find_child_position,
afr_local_child_poll_self_heal, NULL, pos_data);
if (ret)
goto out;
out:
return;
}
int
afr_crawl_build_start_loc (xlator_t *this, afr_crawl_data_t *crawl_data,
loc_t *dirloc)
{
afr_private_t *priv = NULL;
dict_t *xattr = NULL;
void *index_gfid = NULL;
loc_t rootloc = {0};
struct iatt iattr = {0};
struct iatt parent = {0};
int ret = 0;
xlator_t *readdir_xl = crawl_data->readdir_xl;
priv = this->private;
if (crawl_data->crawl == FULL) {
afr_build_root_loc (this, dirloc);
} else {
afr_build_root_loc (this, &rootloc);
ret = syncop_getxattr (readdir_xl, &rootloc, &xattr,
GF_XATTROP_INDEX_GFID);
if (ret < 0)
goto out;
ret = dict_get_ptr (xattr, GF_XATTROP_INDEX_GFID, &index_gfid);
if (ret < 0) {
gf_log (this->name, GF_LOG_ERROR, "failed to get index "
"dir gfid on %s", readdir_xl->name);
goto out;
}
if (!index_gfid) {
gf_log (this->name, GF_LOG_ERROR, "index gfid empty "
"on %s", readdir_xl->name);
ret = -1;
goto out;
}
uuid_copy (dirloc->gfid, index_gfid);
dirloc->path = "";
dirloc->inode = inode_new (priv->root_inode->table);
ret = syncop_lookup (readdir_xl, dirloc, NULL,
&iattr, NULL, &parent);
if (ret < 0) {
gf_log (this->name, GF_LOG_ERROR, "lookup failed on "
"index dir on %s", readdir_xl->name);
goto out;
}
inode_link (dirloc->inode, NULL, NULL, &iattr);
}
ret = 0;
out:
if (xattr)
dict_unref (xattr);
loc_wipe (&rootloc);
return ret;
}
int
afr_crawl_opendir (xlator_t *this, afr_crawl_data_t *crawl_data, fd_t **dirfd,
loc_t *dirloc)
{
fd_t *fd = NULL;
int ret = 0;
if (crawl_data->crawl == FULL) {
fd = fd_create (dirloc->inode, crawl_data->pid);
if (!fd) {
gf_log (this->name, GF_LOG_ERROR,
"Failed to create fd for %s", dirloc->path);
ret = -1;
goto out;
}
ret = syncop_opendir (crawl_data->readdir_xl, dirloc, fd);
if (ret < 0) {
gf_log (this->name, GF_LOG_ERROR,
"opendir failed on %s", dirloc->path);
goto out;
}
} else {
fd = fd_anonymous (dirloc->inode);
}
ret = 0;
out:
if (!ret)
*dirfd = fd;
return ret;
}
xlator_t*
afr_crawl_readdir_xl_get (xlator_t *this, afr_crawl_data_t *crawl_data)
{
afr_private_t *priv = this->private;
if (crawl_data->crawl == FULL) {
return this;
} else {
return priv->children[crawl_data->child];
}
return NULL;
}
int
afr_crawl_build_child_loc (xlator_t *this, loc_t *child, loc_t *parent,
gf_dirent_t *entry, afr_crawl_data_t *crawl_data)
{
int ret = 0;
afr_private_t *priv = NULL;
priv = this->private;
if (crawl_data->crawl == FULL) {
ret = afr_build_child_loc (this, child, parent, entry->d_name);
} else {
child->path = "";
child->inode = inode_new (priv->root_inode->table);
uuid_parse (entry->d_name, child->gfid);
}
return ret;
}
static int
_process_entries (xlator_t *this, loc_t *parentloc, gf_dirent_t *entries,
off_t *offset, afr_crawl_data_t *crawl_data)
{
gf_dirent_t *entry = NULL;
gf_dirent_t *tmp = NULL;
int ret = 0;
loc_t entry_loc = {0};
fd_t *fd = NULL;
struct iatt iattr = {0};
inode_t *link_inode = NULL;
list_for_each_entry_safe (entry, tmp, &entries->list, list) {
if (!_crawl_proceed (this, crawl_data->child,
crawl_data->crawl_flags, NULL)) {
ret = -1;
goto out;
}
*offset = entry->d_off;
if (IS_ENTRY_CWD (entry->d_name) ||
IS_ENTRY_PARENT (entry->d_name))
continue;
if ((crawl_data->crawl == FULL) &&
uuid_is_null (entry->d_stat.ia_gfid)) {
gf_log (this->name, GF_LOG_WARNING, "%s/%s: No "
"gfid present skipping",
parentloc->path, entry->d_name);
continue;
}
if (crawl_data->crawl == INDEX)
entry_loc.path = NULL;//HACK
loc_wipe (&entry_loc);
ret = afr_crawl_build_child_loc (this, &entry_loc, parentloc,
entry, crawl_data);
if (ret)
goto out;
ret = crawl_data->process_entry (this, crawl_data, entry,
&entry_loc, parentloc, &iattr);
if (crawl_data->crawl == INDEX)
continue;
if (ret || !IA_ISDIR (iattr.ia_type))
continue;
link_inode = inode_link (entry_loc.inode, NULL, NULL, &iattr);
if (link_inode == NULL) {
char uuidbuf[64];
gf_log (this->name, GF_LOG_ERROR, "inode link failed "
"on the inode (%s)",
uuid_utoa_r (entry_loc.gfid, uuidbuf));
ret = -1;
goto out;
}
fd = NULL;
ret = afr_crawl_opendir (this, crawl_data, &fd, &entry_loc);
if (ret)
continue;
ret = _crawl_directory (fd, &entry_loc, crawl_data);
if (fd)
fd_unref (fd);
}
ret = 0;
out:
if (crawl_data->crawl == INDEX)
entry_loc.path = NULL;
if (entry_loc.path)
loc_wipe (&entry_loc);
return ret;
}
static int
_crawl_directory (fd_t *fd, loc_t *loc, afr_crawl_data_t *crawl_data)
{
xlator_t *this = NULL;
off_t offset = 0;
gf_dirent_t entries;
int ret = 0;
gf_boolean_t free_entries = _gf_false;
xlator_t *readdir_xl = crawl_data->readdir_xl;
INIT_LIST_HEAD (&entries.list);
this = THIS;
GF_ASSERT (loc->inode);
if (loc->path)
gf_log (this->name, GF_LOG_DEBUG, "crawling %s", loc->path);
else
gf_log (this->name, GF_LOG_DEBUG, "crawling %s",
uuid_utoa (loc->gfid));
while (1) {
if (crawl_data->crawl == FULL)
ret = syncop_readdirp (readdir_xl, fd, 131072, offset,
NULL, &entries);
else
ret = syncop_readdir (readdir_xl, fd, 131072, offset,
&entries);
if (ret <= 0)
break;
ret = 0;
free_entries = _gf_true;
if (!_crawl_proceed (this, crawl_data->child,
crawl_data->crawl_flags, NULL)) {
ret = -1;
goto out;
}
if (list_empty (&entries.list))
goto out;
ret = _process_entries (this, loc, &entries, &offset,
crawl_data);
gf_dirent_free (&entries);
free_entries = _gf_false;
}
ret = 0;
out:
if (free_entries)
gf_dirent_free (&entries);
return ret;
}
static char*
position_str_get (afr_child_pos_t pos)
{
switch (pos) {
case AFR_POS_UNKNOWN:
return "unknown";
case AFR_POS_LOCAL:
return "local";
case AFR_POS_REMOTE:
return "remote";
}
return NULL;
}
int
afr_find_child_position (xlator_t *this, int child, afr_child_pos_t *pos)
{
afr_private_t *priv = NULL;
afr_self_heald_t *shd = NULL;
dict_t *xattr_rsp = NULL;
loc_t loc = {0};
int ret = 0;
char *node_uuid = NULL;
priv = this->private;
shd = &priv->shd;
afr_build_root_loc (this, &loc);
ret = syncop_getxattr (priv->children[child], &loc, &xattr_rsp,
GF_XATTR_NODE_UUID_KEY);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "getxattr failed on %s",
priv->children[child]->name);
goto out;
}
ret = dict_get_str (xattr_rsp, GF_XATTR_NODE_UUID_KEY, &node_uuid);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "node-uuid key not found on "
"child %d", child);
goto out;
}
if (!strcmp (node_uuid, shd->node_uuid))
*pos = AFR_POS_LOCAL;
else
*pos = AFR_POS_REMOTE;
gf_log (this->name, GF_LOG_INFO, "child %s is %s",
priv->children[child]->name, position_str_get (*pos));
out:
if (ret)
*pos = AFR_POS_UNKNOWN;
loc_wipe (&loc);
return ret;
}
int
afr_syncop_find_child_position (void *data)
{
shd_pos_t *pos_data = data;
int ret = 0;
ret = afr_find_child_position (pos_data->this, pos_data->child,
&pos_data->pos);
return ret;
}
static int
afr_dir_crawl (void *data)
{
xlator_t *this = NULL;
int ret = -1;
xlator_t *readdir_xl = NULL;
fd_t *fd = NULL;
loc_t dirloc = {0};
afr_crawl_data_t *crawl_data = data;
this = THIS;
if (!_crawl_proceed (this, crawl_data->child, crawl_data->crawl_flags,
NULL))
goto out;
readdir_xl = afr_crawl_readdir_xl_get (this, crawl_data);
if (!readdir_xl)
goto out;
crawl_data->readdir_xl = readdir_xl;
ret = afr_crawl_build_start_loc (this, crawl_data, &dirloc);
if (ret)
goto out;
ret = afr_crawl_opendir (this, crawl_data, &fd, &dirloc);
if (ret)
goto out;
ret = _crawl_directory (fd, &dirloc, crawl_data);
if (ret)
gf_log (this->name, GF_LOG_ERROR, "Crawl failed on %s",
readdir_xl->name);
else
gf_log (this->name, GF_LOG_INFO, "Crawl completed "
"on %s", readdir_xl->name);
if (crawl_data->crawl == INDEX)
dirloc.path = NULL;
out:
if (fd)
fd_unref (fd);
if (crawl_data->crawl == INDEX)
dirloc.path = NULL;
loc_wipe (&dirloc);
return ret;
}
static int
afr_dir_exclusive_crawl (void *data)
{
afr_private_t *priv = NULL;
afr_self_heald_t *shd = NULL;
gf_boolean_t crawl = _gf_false;
int ret = 0;
int child = -1;
xlator_t *this = NULL;
afr_crawl_data_t *crawl_data = data;
this = THIS;
priv = this->private;
shd = &priv->shd;
child = crawl_data->child;
LOCK (&priv->lock);
{
if (shd->inprogress[child]) {
if (shd->pending[child] != FULL)
shd->pending[child] = crawl_data->crawl;
} else {
shd->inprogress[child] = _gf_true;
crawl = _gf_true;
}
}
UNLOCK (&priv->lock);
if (!crawl) {
gf_log (this->name, GF_LOG_INFO, "Another crawl is in progress "
"for %s", priv->children[child]->name);
goto out;
}
do {
afr_dir_crawl (data);
LOCK (&priv->lock);
{
if (shd->pending[child] != NONE) {
crawl_data->crawl = shd->pending[child];
shd->pending[child] = NONE;
} else {
shd->inprogress[child] = _gf_false;
crawl = _gf_false;
}
}
UNLOCK (&priv->lock);
} while (crawl);
out:
return ret;
}
void
afr_start_crawl (xlator_t *this, int idx, afr_crawl_type_t crawl,
process_entry_cbk_t process_entry, void *op_data,
gf_boolean_t exclusive, int crawl_flags,
afr_crawl_done_cbk_t crawl_done)
{
afr_private_t *priv = NULL;
call_frame_t *frame = NULL;
afr_crawl_data_t *crawl_data = NULL;
int ret = 0;
int (*crawler) (void*) = NULL;
priv = this->private;
frame = create_frame (this, this->ctx->pool);
if (!frame)
goto out;
afr_set_lk_owner (frame, this, frame->root);
afr_set_low_priority (frame);
crawl_data = GF_CALLOC (1, sizeof (*crawl_data),
gf_afr_mt_crawl_data_t);
if (!crawl_data)
goto out;
crawl_data->process_entry = process_entry;
crawl_data->child = idx;
crawl_data->pid = frame->root->pid;
crawl_data->crawl = crawl;
crawl_data->op_data = op_data;
crawl_data->crawl_flags = crawl_flags;
gf_log (this->name, GF_LOG_INFO, "starting crawl %d for %s",
crawl_data->crawl, priv->children[idx]->name);
if (exclusive)
crawler = afr_dir_exclusive_crawl;
else
crawler = afr_dir_crawl;
ret = synctask_new (this->ctx->env, crawler,
crawl_done, frame, crawl_data);
if (ret)
gf_log (this->name, GF_LOG_ERROR, "Could not create the "
"task for %d ret %d", idx, ret);
out:
return;
}
void
afr_build_root_loc (xlator_t *this, loc_t *loc)
{
afr_private_t *priv = NULL;
priv = this->private;
loc->path = gf_strdup ("/");
loc->name = "";
loc->inode = inode_ref (priv->root_inode);
uuid_copy (loc->gfid, loc->inode->gfid);
}
int
afr_set_root_gfid (dict_t *dict)
{
uuid_t gfid;
int ret = 0;
memset (gfid, 0, 16);
gfid[15] = 1;
ret = afr_set_dict_gfid (dict, gfid);
return ret;
}
|