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-rw-r--r--xlators/features/locks/src/clear.c409
1 files changed, 409 insertions, 0 deletions
diff --git a/xlators/features/locks/src/clear.c b/xlators/features/locks/src/clear.c
new file mode 100644
index 000000000..a7b2455e3
--- /dev/null
+++ b/xlators/features/locks/src/clear.c
@@ -0,0 +1,409 @@
+/*
+ Copyright (c) 2006-2011 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/>.
+*/
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <pthread.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "glusterfs.h"
+#include "compat.h"
+#include "xlator.h"
+#include "inode.h"
+#include "logging.h"
+#include "common-utils.h"
+
+#include "locks.h"
+#include "common.h"
+#include "statedump.h"
+#include "clear.h"
+
+int
+clrlk_get_kind (char *kind)
+{
+ char *clrlk_kinds[CLRLK_KIND_MAX] = {"dummy", "blocked", "granted",
+ "all"};
+ int ret_kind = CLRLK_KIND_MAX;
+ int i = 0;
+
+ for (i = CLRLK_BLOCKED; i < CLRLK_KIND_MAX; i++) {
+ if (!strcmp (clrlk_kinds[i], kind)) {
+ ret_kind = i;
+ break;
+ }
+ }
+
+ return ret_kind;
+}
+
+int
+clrlk_get_type (char *type)
+{
+ char *clrlk_types[CLRLK_TYPE_MAX] = {"inode", "entry", "posix"};
+ int ret_type = CLRLK_TYPE_MAX;
+ int i = 0;
+
+ for (i = CLRLK_INODE; i < CLRLK_TYPE_MAX; i++) {
+ if (!strcmp (clrlk_types[i], type)) {
+ ret_type = i;
+ break;
+ }
+ }
+
+ return ret_type;
+}
+
+int
+clrlk_get_lock_range (char *range_str, struct gf_flock *ulock,
+ gf_boolean_t *chk_range)
+{
+ int ret = -1;
+
+ if (!chk_range)
+ goto out;
+
+ if (!range_str) {
+ ret = 0;
+ *chk_range = _gf_false;
+ goto out;
+ }
+
+ if (sscanf (range_str, "%hd,%"PRId64"-""%"PRId64, &ulock->l_whence,
+ &ulock->l_start, &ulock->l_len) != 3) {
+ goto out;
+ }
+
+ ret = 0;
+ *chk_range = _gf_true;
+out:
+ return ret;
+}
+
+int
+clrlk_parse_args (const char* cmd, clrlk_args *args)
+{
+ char *opts = NULL;
+ char *cur = NULL;
+ char *tok = NULL;
+ char *sptr = NULL;
+ char *free_ptr = NULL;
+ char kw[KW_MAX] = {[KW_TYPE] = 't',
+ [KW_KIND] = 'k',
+ };
+ int ret = -1;
+ int i = 0;
+
+ GF_ASSERT (cmd);
+ free_ptr = opts = GF_CALLOC (1, strlen (cmd), gf_common_mt_char);
+ if (!opts)
+ goto out;
+
+ if (sscanf (cmd, GF_XATTR_CLRLK_CMD".%s", opts) < 1) {
+ ret = -1;
+ goto out;
+ }
+
+ /*clr_lk_prefix.ttype.kkind.args, args - type specific*/
+ cur = opts;
+ for (i = 0; i < KW_MAX && (tok = strtok_r (cur, ".", &sptr));
+ cur = NULL, i++) {
+ if (tok[0] != kw[i]) {
+ ret = -1;
+ goto out;
+ }
+ if (i == KW_TYPE)
+ args->type = clrlk_get_type (tok+1);
+ if (i == KW_KIND)
+ args->kind = clrlk_get_kind (tok+1);
+ }
+
+ if ((args->type == CLRLK_TYPE_MAX) || (args->kind == CLRLK_KIND_MAX))
+ goto out;
+
+ /*optional args*/
+ tok = strtok_r (NULL, ".", &sptr);
+ if (tok)
+ args->opts = gf_strdup (tok);
+
+ ret = 0;
+out:
+ if (free_ptr)
+ GF_FREE (free_ptr);
+ return ret;
+}
+
+int
+clrlk_clear_posixlk (xlator_t *this, pl_inode_t *pl_inode, clrlk_args *args,
+ int *blkd, int *granted, int *op_errno)
+{
+ posix_lock_t *plock = NULL;
+ posix_lock_t *tmp = NULL;
+ struct gf_flock ulock = {0, };
+ int ret = -1;
+ int bcount = 0;
+ int gcount = 0;
+ gf_boolean_t chk_range = _gf_false;
+
+ if (clrlk_get_lock_range (args->opts, &ulock, &chk_range)) {
+ *op_errno = EINVAL;
+ goto out;
+ }
+
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ list_for_each_entry_safe (plock, tmp, &pl_inode->ext_list,
+ list) {
+ if ((plock->blocked &&
+ !(args->kind & CLRLK_BLOCKED)) ||
+ (!plock->blocked &&
+ !(args->kind & CLRLK_GRANTED)))
+ continue;
+
+ if (chk_range &&
+ (plock->user_flock.l_whence != ulock.l_whence
+ || plock->user_flock.l_start != ulock.l_start
+ || plock->user_flock.l_len != ulock.l_len))
+ continue;
+
+ list_del_init (&plock->list);
+ if (plock->blocked) {
+ bcount++;
+ pl_trace_out (this, plock->frame, NULL, NULL,
+ F_SETLKW, &plock->user_flock,
+ -1, EAGAIN, NULL);
+
+ STACK_UNWIND (plock->frame, -1, EAGAIN,
+ &plock->user_flock);
+
+ } else {
+ gcount++;
+ }
+ GF_FREE (plock);
+ }
+ }
+ pthread_mutex_unlock (&pl_inode->mutex);
+ grant_blocked_locks (this, pl_inode);
+out:
+ *blkd = bcount;
+ *granted = gcount;
+ return ret;
+}
+
+/* Returns 0 on success and -1 on failure */
+int
+clrlk_clear_inodelk (xlator_t *this, pl_inode_t *pl_inode, pl_dom_list_t *dom,
+ clrlk_args *args, int *blkd, int *granted, int *op_errno)
+{
+ pl_inode_lock_t *ilock = NULL;
+ pl_inode_lock_t *tmp = NULL;
+ struct gf_flock ulock = {0, };
+ int ret = -1;
+ int bcount = 0;
+ int gcount = 0;
+ gf_boolean_t chk_range = _gf_false;
+
+ if (clrlk_get_lock_range (args->opts, &ulock, &chk_range)) {
+ *op_errno = EINVAL;
+ goto out;
+ }
+
+ if (args->kind & CLRLK_BLOCKED)
+ goto blkd;
+
+ if (args->kind & CLRLK_GRANTED)
+ goto granted;
+
+blkd:
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ list_for_each_entry_safe (ilock, tmp, &dom->blocked_inodelks,
+ blocked_locks) {
+ if (chk_range &&
+ (ilock->user_flock.l_whence != ulock.l_whence
+ || ilock->user_flock.l_start != ulock.l_start
+ || ilock->user_flock.l_len != ulock.l_len))
+ continue;
+
+ bcount++;
+ list_del_init (&ilock->list);
+ pl_trace_out (this, ilock->frame, NULL, NULL, F_SETLKW,
+ &ilock->user_flock, -1, EAGAIN,
+ ilock->volume);
+ STACK_UNWIND_STRICT (inodelk, ilock->frame, -1,
+ EAGAIN);
+ GF_FREE (ilock);
+ }
+ }
+ pthread_mutex_unlock (&pl_inode->mutex);
+
+ if (!(args->kind & CLRLK_GRANTED)) {
+ ret = 0;
+ goto out;
+ }
+
+granted:
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ list_for_each_entry_safe (ilock, tmp, &dom->inodelk_list,
+ list) {
+ if (chk_range &&
+ (ilock->user_flock.l_whence != ulock.l_whence
+ || ilock->user_flock.l_start != ulock.l_start
+ || ilock->user_flock.l_len != ulock.l_len))
+ continue;
+
+ gcount++;
+ list_del_init (&ilock->list);
+ GF_FREE (ilock);
+ }
+ }
+ pthread_mutex_unlock (&pl_inode->mutex);
+
+ grant_blocked_inode_locks (this, pl_inode, dom);
+ ret = 0;
+out:
+ *blkd = bcount;
+ *granted = gcount;
+ return ret;
+}
+
+/* Returns 0 on success and -1 on failure */
+int
+clrlk_clear_entrylk (xlator_t *this, pl_inode_t *pl_inode, pl_dom_list_t *dom,
+ clrlk_args *args, int *blkd, int *granted, int *op_errno)
+{
+ pl_entry_lock_t *elock = NULL;
+ pl_entry_lock_t *tmp = NULL;
+ struct list_head removed = {0};
+ int bcount = 0;
+ int gcount = 0;
+ int ret = -1;
+
+ if (args->kind & CLRLK_BLOCKED)
+ goto blkd;
+
+ if (args->kind & CLRLK_GRANTED)
+ goto granted;
+
+blkd:
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ list_for_each_entry_safe (elock, tmp, &dom->blocked_entrylks,
+ blocked_locks) {
+ if (args->opts &&
+ strncmp (elock->basename, args->opts,
+ strlen (elock->basename)))
+ continue;
+
+ bcount++;
+ list_del_init (&elock->domain_list);
+ STACK_UNWIND_STRICT (entrylk, elock->frame, -1,
+ EAGAIN);
+ GF_FREE ((char *) elock->basename);
+ GF_FREE (elock);
+ }
+ }
+ pthread_mutex_unlock (&pl_inode->mutex);
+
+ if (!(args->kind & CLRLK_GRANTED)) {
+ ret = 0;
+ goto out;
+ }
+
+granted:
+ INIT_LIST_HEAD (&removed);
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ list_for_each_entry_safe (elock, tmp, &dom->entrylk_list,
+ domain_list) {
+ if (!elock->basename)
+ continue;
+
+ if (args->opts &&
+ strncmp (elock->basename, args->opts,
+ strlen (elock->basename)))
+ continue;
+
+ gcount++;
+ list_del_init (&elock->domain_list);
+ list_add_tail (&elock->domain_list, &removed);
+ }
+ }
+ pthread_mutex_unlock (&pl_inode->mutex);
+
+ list_for_each_entry_safe (elock, tmp, &removed, domain_list) {
+ grant_blocked_entry_locks (this, pl_inode, elock, dom);
+ }
+
+ ret = 0;
+out:
+ *blkd = bcount;
+ *granted = gcount;
+ return ret;
+}
+
+int
+clrlk_clear_lks_in_all_domains (xlator_t *this, pl_inode_t *pl_inode,
+ clrlk_args *args, int *blkd, int *granted,
+ int *op_errno)
+{
+ pl_dom_list_t *dom = NULL;
+ int ret = -1;
+ int tmp_bcount = 0;
+ int tmp_gcount = 0;
+
+ if (list_empty (&pl_inode->dom_list)) {
+ ret = 0;
+ goto out;
+ }
+
+ list_for_each_entry (dom, &pl_inode->dom_list, inode_list) {
+ tmp_bcount = tmp_gcount = 0;
+
+ switch (args->type)
+ {
+ case CLRLK_INODE:
+ ret = clrlk_clear_inodelk (this, pl_inode, dom, args,
+ &tmp_bcount, &tmp_gcount,
+ op_errno);
+ if (ret)
+ goto out;
+ break;
+ case CLRLK_ENTRY:
+ ret = clrlk_clear_entrylk (this, pl_inode, dom, args,
+ &tmp_bcount, &tmp_gcount,
+ op_errno);
+ if (ret)
+ goto out;
+ break;
+ }
+
+ *blkd += tmp_bcount;
+ *granted += tmp_gcount;
+ }
+
+ ret = 0;
+out:
+ return ret;
+}
generated by cgit (git 2.34.1) at 2024-11-06 03:22:18 +0000