diff options
Diffstat (limited to 'xlators/features/locks/src/posix.c')
| -rw-r--r-- | xlators/features/locks/src/posix.c | 5455 |
1 files changed, 4836 insertions, 619 deletions
diff --git a/xlators/features/locks/src/posix.c b/xlators/features/locks/src/posix.c index 09823b46d31..cf0ae4c57dd 100644 --- a/xlators/features/locks/src/posix.c +++ b/xlators/features/locks/src/posix.c @@ -1,878 +1,5095 @@ /* - Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.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/>. -*/ + Copyright (c) 2006-2012, 2016 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. +*/ #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 <glusterfs/compat.h> +#include <glusterfs/logging.h> #include "locks.h" #include "common.h" +#include <glusterfs/statedump.h> +#include "clear.h" +#include <glusterfs/defaults.h> +#include <glusterfs/syncop.h> #ifndef LLONG_MAX #define LLONG_MAX LONG_LONG_MAX /* compat with old gcc */ -#endif /* LLONG_MAX */ +#endif /* LLONG_MAX */ /* Forward declarations */ +void +do_blocked_rw(pl_inode_t *); +static int +__rw_allowable(pl_inode_t *, posix_lock_t *, glusterfs_fop_t); +static int +format_brickname(char *); +int +pl_lockinfo_get_brickname(xlator_t *, inode_t *, int32_t *); +static int +fetch_pathinfo(xlator_t *, inode_t *, int32_t *, char **); -void do_blocked_rw (pl_inode_t *); -static int __rw_allowable (pl_inode_t *, posix_lock_t *, glusterfs_fop_t); +/* + * The client is always requesting data, but older + * servers were not returning it. Newer ones are, so + * the client is receiving a mix of NULL and non-NULL + * xdata in the answers when bricks are of different + * versions. This triggers a bug in older clients. + * To prevent that, we avoid returning extra xdata to + * older clients (making the newer brick to behave as + * an old brick). + */ +#define PL_STACK_UNWIND_FOR_CLIENT(fop, xdata, frame, op_ret, params...) \ + do { \ + pl_local_t *__local = NULL; \ + if (frame->root->client && \ + (frame->root->client->opversion < GD_OP_VERSION_3_10_0)) { \ + __local = frame->local; \ + PL_STACK_UNWIND_AND_FREE(__local, fop, frame, op_ret, params); \ + } else { \ + PL_STACK_UNWIND(fop, xdata, frame, op_ret, params); \ + } \ + } while (0) + +#define PL_STACK_UNWIND(fop, xdata, frame, op_ret, params...) \ + do { \ + pl_local_t *__local = NULL; \ + inode_t *__parent = NULL; \ + inode_t *__inode = NULL; \ + char *__name = NULL; \ + dict_t *__unref = NULL; \ + int __i = 0; \ + __local = frame->local; \ + if (op_ret >= 0 && pl_needs_xdata_response(frame->local)) { \ + if (xdata) \ + dict_ref(xdata); \ + else \ + xdata = dict_new(); \ + if (xdata) { \ + __unref = xdata; \ + while (__local->fd || __local->loc[__i].inode) { \ + pl_get_xdata_rsp_args(__local, #fop, &__parent, &__inode, \ + &__name, __i); \ + pl_set_xdata_response(frame->this, __local, __parent, \ + __inode, __name, xdata, __i > 0); \ + if (__local->fd || __i == 1) \ + break; \ + __i++; \ + } \ + } \ + } \ + PL_STACK_UNWIND_AND_FREE(__local, fop, frame, op_ret, params); \ + if (__unref) \ + dict_unref(__unref); \ + } while (0) + +#define PL_LOCAL_GET_REQUESTS(frame, this, xdata, __fd, __loc, __newloc) \ + do { \ + if (pl_has_xdata_requests(xdata)) { \ + if (!frame->local) \ + frame->local = mem_get0(this->local_pool); \ + pl_local_t *__local = frame->local; \ + if (__local) { \ + if (__fd) { \ + __local->fd = fd_ref(__fd); \ + __local->inode = inode_ref(__fd->inode); \ + } else { \ + if (__loc) \ + loc_copy(&__local->loc[0], __loc); \ + if (__newloc) \ + loc_copy(&__local->loc[1], __newloc); \ + __local->inode = inode_ref(__local->loc[0].inode); \ + } \ + pl_get_xdata_requests(__local, xdata); \ + } \ + } \ + } while (0) + +#define PL_CHECK_LOCK_ENFORCE_KEY(frame, dict, name, this, loc, fd, priv) \ + do { \ + if ((dict && (dict_get(dict, GF_ENFORCE_MANDATORY_LOCK))) || \ + (name && (strcmp(name, GF_ENFORCE_MANDATORY_LOCK) == 0))) { \ + inode_t *__inode = (loc ? loc->inode : fd->inode); \ + pl_inode_t *__pl_inode = pl_inode_get(this, __inode, NULL); \ + if (__pl_inode == NULL) { \ + op_ret = -1; \ + op_errno = ENOMEM; \ + goto unwind; \ + } \ + if (!pl_is_mandatory_locking_enabled(__pl_inode) || \ + !priv->mlock_enforced) { \ + op_ret = -1; \ + gf_msg(this->name, GF_LOG_DEBUG, EINVAL, 0, \ + "option %s would need mandatory lock to be enabled " \ + "and feature.enforce-mandatory-lock option to be set " \ + "to on", \ + GF_ENFORCE_MANDATORY_LOCK); \ + op_errno = EINVAL; \ + goto unwind; \ + } \ + \ + op_ret = pl_local_init(frame, this, loc, fd); \ + if (op_ret) { \ + op_errno = ENOMEM; \ + goto unwind; \ + } \ + \ + ((pl_local_t *)(frame->local))->update_mlock_enforced_flag = 1; \ + } \ + } while (0) + +#define PL_INODE_REMOVE(_fop, _frame, _xl, _loc1, _loc2, _cont, _cbk, \ + _args...) \ + ({ \ + struct list_head contend; \ + pl_inode_t *__pl_inode; \ + call_stub_t *__stub; \ + int32_t __error; \ + INIT_LIST_HEAD(&contend); \ + __error = pl_inode_remove_prepare(_xl, _frame, _loc2 ? _loc2 : _loc1, \ + &__pl_inode, &contend); \ + if (__error < 0) { \ + __stub = fop_##_fop##_stub(_frame, _cont, ##_args); \ + __error = pl_inode_remove_complete(_xl, __pl_inode, __stub, \ + &contend); \ + } else if (__error == 0) { \ + PL_LOCAL_GET_REQUESTS(_frame, _xl, xdata, ((fd_t *)NULL), _loc1, \ + _loc2); \ + STACK_WIND_COOKIE(_frame, _cbk, __pl_inode, FIRST_CHILD(_xl), \ + FIRST_CHILD(_xl)->fops->_fop, ##_args); \ + } \ + __error; \ + }) + +gf_boolean_t +pl_has_xdata_requests(dict_t *xdata) +{ + static char *reqs[] = {GLUSTERFS_ENTRYLK_COUNT, + GLUSTERFS_INODELK_COUNT, + GLUSTERFS_INODELK_DOM_COUNT, + GLUSTERFS_POSIXLK_COUNT, + GLUSTERFS_PARENT_ENTRYLK, + GLUSTERFS_MULTIPLE_DOM_LK_CNT_REQUESTS, + NULL}; + static int reqs_size[] = {SLEN(GLUSTERFS_ENTRYLK_COUNT), + SLEN(GLUSTERFS_INODELK_COUNT), + SLEN(GLUSTERFS_INODELK_DOM_COUNT), + SLEN(GLUSTERFS_POSIXLK_COUNT), + SLEN(GLUSTERFS_PARENT_ENTRYLK), + SLEN(GLUSTERFS_MULTIPLE_DOM_LK_CNT_REQUESTS), + 0}; + int i = 0; + + if (!xdata) + return _gf_false; + + for (i = 0; reqs[i]; i++) + if (dict_getn(xdata, reqs[i], reqs_size[i])) + return _gf_true; + + return _gf_false; +} -struct _truncate_ops { - loc_t loc; - fd_t *fd; - off_t offset; - enum {TRUNCATE, FTRUNCATE} op; -}; +static int +dict_delete_domain_key(dict_t *dict, char *key, data_t *value, void *data) +{ + dict_del(dict, key); + return 0; +} +void +pl_get_xdata_requests(pl_local_t *local, dict_t *xdata) +{ + if (!local || !xdata) + return; + + GF_ASSERT(local->xdata == NULL); + local->xdata = dict_copy_with_ref(xdata, NULL); + + if (dict_get_sizen(xdata, GLUSTERFS_ENTRYLK_COUNT)) { + local->entrylk_count_req = 1; + dict_del_sizen(xdata, GLUSTERFS_ENTRYLK_COUNT); + } + if (dict_get_sizen(xdata, GLUSTERFS_INODELK_COUNT)) { + local->inodelk_count_req = 1; + dict_del_sizen(xdata, GLUSTERFS_INODELK_COUNT); + } + if (dict_get_sizen(xdata, GLUSTERFS_MULTIPLE_DOM_LK_CNT_REQUESTS)) { + local->multiple_dom_lk_requests = 1; + dict_del_sizen(xdata, GLUSTERFS_MULTIPLE_DOM_LK_CNT_REQUESTS); + dict_foreach_fnmatch(xdata, GLUSTERFS_INODELK_DOM_PREFIX "*", + dict_delete_domain_key, NULL); + } + + local->inodelk_dom_count_req = dict_get_sizen(xdata, + GLUSTERFS_INODELK_DOM_COUNT); + if (local->inodelk_dom_count_req) { + data_ref(local->inodelk_dom_count_req); + dict_del_sizen(xdata, GLUSTERFS_INODELK_DOM_COUNT); + } + + if (dict_get_sizen(xdata, GLUSTERFS_POSIXLK_COUNT)) { + local->posixlk_count_req = 1; + dict_del_sizen(xdata, GLUSTERFS_POSIXLK_COUNT); + } + + if (dict_get_sizen(xdata, GLUSTERFS_PARENT_ENTRYLK)) { + local->parent_entrylk_req = 1; + dict_del_sizen(xdata, GLUSTERFS_PARENT_ENTRYLK); + } +} -int -pl_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, struct stat *buf) +gf_boolean_t +pl_needs_xdata_response(pl_local_t *local) { - struct _truncate_ops *local = NULL; + if (!local) + return _gf_false; - local = frame->local; + if (local->parent_entrylk_req || local->entrylk_count_req || + local->inodelk_dom_count_req || local->inodelk_count_req || + local->posixlk_count_req || local->multiple_dom_lk_requests) + return _gf_true; - if (local->op == TRUNCATE) - loc_wipe (&local->loc); + return _gf_false; +} - STACK_UNWIND (frame, op_ret, op_errno, buf); - return 0; +void +pl_get_xdata_rsp_args(pl_local_t *local, char *fop, inode_t **parent, + inode_t **inode, char **name, int i) +{ + if (strcmp(fop, "lookup") == 0) { + *parent = local->loc[0].parent; + *inode = local->loc[0].inode; + *name = (char *)local->loc[0].name; + } else { + if (local->fd) { + *inode = local->fd->inode; + } else { + *inode = local->loc[i].parent; + } + } } +static inline int +pl_track_io_fop_count(pl_local_t *local, xlator_t *this, pl_count_op_t op) +{ + pl_inode_t *pl_inode = NULL; + + if (!local) + return -1; + + pl_inode = pl_inode_get(this, local->inode, NULL); + if (!pl_inode) + return -1; + + if (pl_inode->mlock_enforced && pl_inode->track_fop_wind_count) { + pthread_mutex_lock(&pl_inode->mutex); + { + if (op == DECREMENT) { + pl_inode->fop_wind_count--; + /* fop_wind_count can go negative when lock enforcement is + * enabled on unwind path of an IO. Hence the "<" comparision. + */ + if (pl_inode->fop_wind_count <= 0) { + pthread_cond_broadcast(&pl_inode->check_fop_wind_count); + pl_inode->track_fop_wind_count = _gf_false; + pl_inode->fop_wind_count = 0; + } + } else { + pl_inode->fop_wind_count++; + } + } + pthread_mutex_unlock(&pl_inode->mutex); + } + + return 0; +} -static int -truncate_allowed (pl_inode_t *pl_inode, - transport_t *transport, pid_t client_pid, - off_t offset) +static int32_t +__get_posixlk_count(pl_inode_t *pl_inode) +{ + posix_lock_t *lock = NULL; + int32_t count = 0; + + list_for_each_entry(lock, &pl_inode->ext_list, list) { count++; } + + return count; +} + +int32_t +get_posixlk_count(xlator_t *this, inode_t *inode) { - posix_lock_t *l = NULL; - posix_lock_t region = {.list = {0, }, }; - int ret = 1; + pl_inode_t *pl_inode = NULL; + uint64_t tmp_pl_inode = 0; + int32_t count = 0; + + int ret = inode_ctx_get(inode, this, &tmp_pl_inode); + if (ret != 0) { + goto out; + } - region.fl_start = offset; - region.fl_end = LLONG_MAX; - region.transport = transport; - region.client_pid = client_pid; + pl_inode = (pl_inode_t *)(long)tmp_pl_inode; - pthread_mutex_lock (&pl_inode->mutex); - { - list_for_each_entry (l, &pl_inode->ext_list, list) { - if (!l->blocked - && locks_overlap (®ion, l) - && !same_owner (®ion, l)) { - ret = 0; - break; - } - } - } - pthread_mutex_unlock (&pl_inode->mutex); + pthread_mutex_lock(&pl_inode->mutex); + { + count = __get_posixlk_count(pl_inode); + } + pthread_mutex_unlock(&pl_inode->mutex); - return ret; +out: + return count; } +void +pl_parent_entrylk_xattr_fill(xlator_t *this, inode_t *parent, char *basename, + dict_t *dict, gf_boolean_t keep_max) +{ + int32_t entrylk = 0; + int32_t maxcount = -1; + int ret = -1; + + if (!parent || !basename) + goto out; + if (keep_max) { + ret = dict_get_int32_sizen(dict, GLUSTERFS_PARENT_ENTRYLK, &maxcount); + if (ret < 0) + gf_msg_debug(this->name, 0, " Failed to fetch the value for key %s", + GLUSTERFS_PARENT_ENTRYLK); + } + entrylk = check_entrylk_on_basename(this, parent, basename); + if (maxcount >= entrylk) + return; +out: + ret = dict_set_int32_sizen(dict, GLUSTERFS_PARENT_ENTRYLK, entrylk); + if (ret < 0) { + gf_msg_debug(this->name, 0, " dict_set failed on key %s", + GLUSTERFS_PARENT_ENTRYLK); + } +} + +void +pl_entrylk_xattr_fill(xlator_t *this, inode_t *inode, dict_t *dict, + gf_boolean_t keep_max) +{ + int32_t count = 0; + int32_t maxcount = -1; + int ret = -1; + + if (keep_max) { + ret = dict_get_int32_sizen(dict, GLUSTERFS_ENTRYLK_COUNT, &maxcount); + if (ret < 0) + gf_msg_debug(this->name, 0, " Failed to fetch the value for key %s", + GLUSTERFS_ENTRYLK_COUNT); + } + count = get_entrylk_count(this, inode); + if (maxcount >= count) + return; + + ret = dict_set_int32_sizen(dict, GLUSTERFS_ENTRYLK_COUNT, count); + if (ret < 0) { + gf_msg_debug(this->name, 0, " dict_set failed on key %s", + GLUSTERFS_ENTRYLK_COUNT); + } +} + +void +pl_inodelk_xattr_fill(xlator_t *this, inode_t *inode, dict_t *dict, + char *domname, gf_boolean_t keep_max) +{ + int32_t count = 0; + int32_t maxcount = -1; + int ret = -1; + + if (keep_max) { + ret = dict_get_int32_sizen(dict, GLUSTERFS_INODELK_COUNT, &maxcount); + if (ret < 0) + gf_msg_debug(this->name, 0, " Failed to fetch the value for key %s", + GLUSTERFS_INODELK_COUNT); + } + count = get_inodelk_count(this, inode, domname); + if (maxcount >= count) + return; + + ret = dict_set_int32_sizen(dict, GLUSTERFS_INODELK_COUNT, count); + if (ret < 0) { + gf_msg_debug(this->name, 0, + "Failed to set count for " + "key %s", + GLUSTERFS_INODELK_COUNT); + } + + return; +} + +void +pl_posixlk_xattr_fill(xlator_t *this, inode_t *inode, dict_t *dict, + gf_boolean_t keep_max) +{ + int32_t count = 0; + int32_t maxcount = -1; + int ret = -1; + + if (keep_max) { + ret = dict_get_int32_sizen(dict, GLUSTERFS_POSIXLK_COUNT, &maxcount); + if (ret < 0) + gf_msg_debug(this->name, 0, " Failed to fetch the value for key %s", + GLUSTERFS_POSIXLK_COUNT); + } + count = get_posixlk_count(this, inode); + if (maxcount >= count) + return; + + ret = dict_set_int32_sizen(dict, GLUSTERFS_POSIXLK_COUNT, count); + if (ret < 0) { + gf_msg_debug(this->name, 0, " dict_set failed on key %s", + GLUSTERFS_POSIXLK_COUNT); + } +} + +void +pl_inodelk_xattr_fill_each(xlator_t *this, inode_t *inode, dict_t *dict, + char *domname, gf_boolean_t keep_max, char *key) +{ + int32_t count = 0; + int32_t maxcount = -1; + int ret = -1; + + if (keep_max) { + ret = dict_get_int32(dict, key, &maxcount); + if (ret < 0) + gf_msg_debug(this->name, 0, " Failed to fetch the value for key %s", + GLUSTERFS_INODELK_COUNT); + } + count = get_inodelk_count(this, inode, domname); + if (maxcount >= count) + return; + + ret = dict_set_int32(dict, key, count); + if (ret < 0) { + gf_msg_debug(this->name, 0, + "Failed to set count for " + "key %s", + key); + } + + return; +} static int -truncate_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, struct stat *buf) -{ - posix_locks_private_t *priv = NULL; - struct _truncate_ops *local = NULL; - inode_t *inode = NULL; - pl_inode_t *pl_inode = NULL; - - - priv = this->private; - local = frame->local; - - if (op_ret != 0) { - gf_log (this->name, GF_LOG_ERROR, - "got error (errno=%d, stderror=%s) from child", - op_errno, strerror (op_errno)); - goto unwind; - } - - if (local->op == TRUNCATE) - inode = local->loc.inode; - else - inode = local->fd->inode; - - pl_inode = pl_inode_get (this, inode); - if (!pl_inode) { - gf_log (this->name, GF_LOG_ERROR, - "unable to get pl_inode from %p", inode); - op_errno = ENOMEM; - goto unwind; - } - - if (priv->mandatory - && pl_inode->mandatory - && !truncate_allowed (pl_inode, frame->root->trans, - frame->root->pid, local->offset)) { - op_errno = EAGAIN; - goto unwind; - } - - switch (local->op) { - case TRUNCATE: - STACK_WIND (frame, pl_truncate_cbk, FIRST_CHILD (this), - FIRST_CHILD (this)->fops->truncate, - &local->loc, local->offset); - break; - case FTRUNCATE: - STACK_WIND (frame, pl_truncate_cbk, FIRST_CHILD (this), - FIRST_CHILD (this)->fops->ftruncate, - local->fd, local->offset); - break; - } - - return 0; +pl_inodelk_xattr_fill_multiple(dict_t *this, char *key, data_t *value, + void *data) +{ + multi_dom_lk_data *d = data; + char *tmp_key = NULL; + char *save_ptr = NULL; + + tmp_key = gf_strdup(key); + if (!tmp_key) + return -1; + + strtok_r(tmp_key, ":", &save_ptr); + if (!*save_ptr) { + if (tmp_key) + GF_FREE(tmp_key); + gf_msg(THIS->name, GF_LOG_ERROR, 0, EINVAL, + "Could not tokenize domain string from key %s", key); + return -1; + } + + pl_inodelk_xattr_fill_each(d->this, d->inode, d->xdata_rsp, save_ptr, + d->keep_max, key); + if (tmp_key) + GF_FREE(tmp_key); + + return 0; +} -unwind: - if (local->op == TRUNCATE) - loc_wipe (&local->loc); +void +pl_fill_multiple_dom_lk_requests(xlator_t *this, pl_local_t *local, + inode_t *inode, dict_t *dict, + gf_boolean_t keep_max) +{ + multi_dom_lk_data data; - STACK_UNWIND (frame, -1, ENOMEM, buf); - return 0; + data.this = this; + data.inode = inode; + data.xdata_rsp = dict; + data.keep_max = keep_max; + + dict_foreach_fnmatch(local->xdata, GLUSTERFS_INODELK_DOM_PREFIX "*", + pl_inodelk_xattr_fill_multiple, &data); } +void +pl_set_xdata_response(xlator_t *this, pl_local_t *local, inode_t *parent, + inode_t *inode, char *name, dict_t *xdata, + gf_boolean_t max_lock) +{ + if (!xdata || !local) + return; + + if (local->parent_entrylk_req && parent && name && name[0] != '\0') + pl_parent_entrylk_xattr_fill(this, parent, name, xdata, max_lock); + + if (!inode) + return; + + if (local->entrylk_count_req) + pl_entrylk_xattr_fill(this, inode, xdata, max_lock); + + if (local->inodelk_dom_count_req) + pl_inodelk_xattr_fill(this, inode, xdata, + data_to_str(local->inodelk_dom_count_req), + max_lock); + + if (local->inodelk_count_req) + pl_inodelk_xattr_fill(this, inode, xdata, NULL, max_lock); + + if (local->posixlk_count_req) + pl_posixlk_xattr_fill(this, inode, xdata, max_lock); + + if (local->multiple_dom_lk_requests) + pl_fill_multiple_dom_lk_requests(this, local, inode, xdata, max_lock); +} +/* Checks whether the region where fop is acting upon conflicts + * with existing locks. If there is no conflict function returns + * 1 else returns 0 with can_block boolean set accordingly to + * indicate block/fail the fop. + */ int -pl_truncate (call_frame_t *frame, xlator_t *this, - loc_t *loc, off_t offset) +pl_is_fop_allowed(pl_inode_t *pl_inode, posix_lock_t *region, fd_t *fd, + glusterfs_fop_t op, gf_boolean_t *can_block) { - struct _truncate_ops *local = NULL; + int ret = 0; + + if (!__rw_allowable(pl_inode, region, op)) { + if (pl_inode->mlock_enforced) { + *can_block = _gf_false; + } else if ((!fd) || (fd && (fd->flags & O_NONBLOCK))) { + gf_log("locks", GF_LOG_TRACE, + "returning EAGAIN" + " because fd is O_NONBLOCK"); + *can_block = _gf_false; + } else { + *can_block = _gf_true; + } + } else { + ret = 1; + } + + return ret; +} + +static pl_fdctx_t * +pl_new_fdctx() +{ + pl_fdctx_t *fdctx = GF_MALLOC(sizeof(*fdctx), gf_locks_mt_pl_fdctx_t); + GF_VALIDATE_OR_GOTO("posix-locks", fdctx, out); - local = CALLOC (1, sizeof (struct _truncate_ops)); - if (!local) { - gf_log (this->name, GF_LOG_ERROR, - "out of memory :("); - goto unwind; - } + INIT_LIST_HEAD(&fdctx->locks_list); + +out: + return fdctx; +} - local->op = TRUNCATE; - local->offset = offset; - loc_copy (&local->loc, loc); +static pl_fdctx_t * +pl_check_n_create_fdctx(xlator_t *this, fd_t *fd) +{ + int ret = 0; + uint64_t tmp = 0; + pl_fdctx_t *fdctx = NULL; + + GF_VALIDATE_OR_GOTO("posix-locks", this, out); + GF_VALIDATE_OR_GOTO(this->name, fd, out); + + LOCK(&fd->lock); + { + ret = __fd_ctx_get(fd, this, &tmp); + if ((ret != 0) || (tmp == 0)) { + fdctx = pl_new_fdctx(); + if (fdctx == NULL) { + goto unlock; + } + } + + ret = __fd_ctx_set(fd, this, (uint64_t)(long)fdctx); + if (ret != 0) { + GF_FREE(fdctx); + fdctx = NULL; + UNLOCK(&fd->lock); + gf_log(this->name, GF_LOG_DEBUG, "failed to set fd ctx"); + goto out; + } + } +unlock: + UNLOCK(&fd->lock); - frame->local = local; +out: + return fdctx; +} - STACK_WIND (frame, truncate_stat_cbk, FIRST_CHILD (this), - FIRST_CHILD (this)->fops->stat, loc); +int32_t +pl_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *prebuf, + struct iatt *postbuf, dict_t *xdata) +{ + pl_track_io_fop_count(frame->local, this, DECREMENT); - return 0; + PL_STACK_UNWIND(discard, xdata, frame, op_ret, op_errno, prebuf, postbuf, + xdata); + return 0; +} +int +pl_discard_cont(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + pl_track_io_fop_count(frame->local, this, INCREMENT); + + STACK_WIND(frame, pl_discard_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->discard, fd, offset, len, xdata); + return 0; +} + +int32_t +pl_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + size_t len, dict_t *xdata) +{ + pl_local_t *local = NULL; + pl_inode_t *pl_inode = NULL; + pl_rw_req_t *rw = NULL; + posix_lock_t region = { + .list = + { + 0, + }, + }; + gf_boolean_t enabled = _gf_false; + gf_boolean_t can_block = _gf_true; + int op_ret = 0; + int op_errno = 0; + int allowed = 1; + + GF_VALIDATE_OR_GOTO("locks", this, unwind); + + local = mem_get0(this->local_pool); + if (!local) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + frame->local = local; + local->inode = inode_ref(fd->inode); + local->fd = fd_ref(fd); + + pl_inode = pl_inode_get(this, fd->inode, local); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + if (frame->root->pid < 0) + enabled = _gf_false; + else + enabled = pl_is_mandatory_locking_enabled(pl_inode); + + if (enabled) { + region.fl_start = offset; + region.fl_end = offset + len - 1; + region.client = frame->root->client; + region.fd_num = fd_to_fdnum(fd); + region.client_pid = frame->root->pid; + region.owner = frame->root->lk_owner; + + pthread_mutex_lock(&pl_inode->mutex); + { + allowed = pl_is_fop_allowed(pl_inode, ®ion, fd, GF_FOP_DISCARD, + &can_block); + if (allowed == 1) { + if (pl_inode->mlock_enforced && + pl_inode->track_fop_wind_count) { + pl_inode->fop_wind_count++; + } + goto unlock; + } else if (!can_block) { + op_errno = EAGAIN; + op_ret = -1; + goto unlock; + } + + rw = GF_MALLOC(sizeof(*rw), gf_locks_mt_pl_rw_req_t); + if (!rw) { + op_errno = ENOMEM; + op_ret = -1; + goto unlock; + } + + rw->stub = fop_discard_stub(frame, pl_discard_cont, fd, offset, len, + xdata); + if (!rw->stub) { + op_errno = ENOMEM; + op_ret = -1; + GF_FREE(rw); + goto unlock; + } + + rw->region = region; + + list_add_tail(&rw->list, &pl_inode->rw_list); + } + unlock: + pthread_mutex_unlock(&pl_inode->mutex); + } + + if (allowed == 1) + STACK_WIND(frame, pl_discard_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->discard, fd, offset, len, xdata); unwind: - STACK_UNWIND (frame, -1, ENOMEM, NULL); + if (op_ret == -1) + PL_STACK_UNWIND(discard, xdata, frame, op_ret, op_errno, NULL, NULL, + NULL); - return 0; + return 0; } +int32_t +pl_zerofill_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *prebuf, + struct iatt *postbuf, dict_t *xdata) +{ + pl_track_io_fop_count(frame->local, this, DECREMENT); + + PL_STACK_UNWIND(zerofill, xdata, frame, op_ret, op_errno, prebuf, postbuf, + xdata); + return 0; +} int -pl_ftruncate (call_frame_t *frame, xlator_t *this, - fd_t *fd, off_t offset) +pl_zerofill_cont(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + off_t len, dict_t *xdata) { - struct _truncate_ops *local = NULL; + pl_track_io_fop_count(frame->local, this, INCREMENT); - local = CALLOC (1, sizeof (struct _truncate_ops)); - if (!local) { - gf_log (this->name, GF_LOG_ERROR, - "out of memory :("); - goto unwind; - } + STACK_WIND(frame, pl_zerofill_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->zerofill, fd, offset, len, xdata); + return 0; +} - local->op = FTRUNCATE; - local->offset = offset; - local->fd = fd; +int32_t +pl_zerofill(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + off_t len, dict_t *xdata) +{ + pl_local_t *local = NULL; + pl_inode_t *pl_inode = NULL; + pl_rw_req_t *rw = NULL; + posix_lock_t region = { + .list = + { + 0, + }, + }; + gf_boolean_t enabled = _gf_false; + gf_boolean_t can_block = _gf_true; + int op_ret = 0; + int op_errno = 0; + int allowed = 1; + + GF_VALIDATE_OR_GOTO("locks", this, unwind); + + local = mem_get0(this->local_pool); + if (!local) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + frame->local = local; + local->inode = inode_ref(fd->inode); + local->fd = fd_ref(fd); + + pl_inode = pl_inode_get(this, fd->inode, local); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + if (frame->root->pid < 0) + enabled = _gf_false; + else + enabled = pl_is_mandatory_locking_enabled(pl_inode); + + if (enabled) { + region.fl_start = offset; + region.fl_end = offset + len - 1; + region.client = frame->root->client; + region.fd_num = fd_to_fdnum(fd); + region.client_pid = frame->root->pid; + region.owner = frame->root->lk_owner; + + pthread_mutex_lock(&pl_inode->mutex); + { + allowed = pl_is_fop_allowed(pl_inode, ®ion, fd, GF_FOP_ZEROFILL, + &can_block); + if (allowed == 1) { + if (pl_inode->mlock_enforced && + pl_inode->track_fop_wind_count) { + pl_inode->fop_wind_count++; + } + goto unlock; + } else if (!can_block) { + op_errno = EAGAIN; + op_ret = -1; + goto unlock; + } + + rw = GF_MALLOC(sizeof(*rw), gf_locks_mt_pl_rw_req_t); + if (!rw) { + op_errno = ENOMEM; + op_ret = -1; + goto unlock; + } + + rw->stub = fop_zerofill_stub(frame, pl_zerofill_cont, fd, offset, + len, xdata); + if (!rw->stub) { + op_errno = ENOMEM; + op_ret = -1; + GF_FREE(rw); + goto unlock; + } + + rw->region = region; + + list_add_tail(&rw->list, &pl_inode->rw_list); + } + unlock: + pthread_mutex_unlock(&pl_inode->mutex); + } + + if (allowed == 1) + STACK_WIND(frame, pl_zerofill_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->zerofill, fd, offset, len, xdata); +unwind: + if (op_ret == -1) + PL_STACK_UNWIND(zerofill, xdata, frame, op_ret, op_errno, NULL, NULL, + NULL); + + return 0; +} + +int +pl_truncate_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *prebuf, + struct iatt *postbuf, dict_t *xdata) +{ + pl_local_t *local = frame->local; + + pl_track_io_fop_count(local, this, DECREMENT); + + if (local->op == GF_FOP_TRUNCATE) + PL_STACK_UNWIND(truncate, xdata, frame, op_ret, op_errno, prebuf, + postbuf, xdata); + else + PL_STACK_UNWIND(ftruncate, xdata, frame, op_ret, op_errno, prebuf, + postbuf, xdata); + return 0; +} + +int +pl_ftruncate_cont(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + dict_t *xdata) +{ + pl_track_io_fop_count(frame->local, this, INCREMENT); + + STACK_WIND(frame, pl_truncate_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->ftruncate, fd, offset, xdata); + return 0; +} + +int +pl_truncate_cont(call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset, + dict_t *xdata) +{ + pl_track_io_fop_count(frame->local, this, INCREMENT); + + STACK_WIND(frame, pl_truncate_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->truncate, loc, offset, xdata); + return 0; +} + +static int +truncate_stat_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *buf, + dict_t *xdata) +{ + pl_local_t *local = frame->local; + inode_t *inode = NULL; + pl_inode_t *pl_inode = NULL; + pl_rw_req_t *rw = NULL; + posix_lock_t region = { + .list = + { + 0, + }, + }; + gf_boolean_t enabled = _gf_false; + gf_boolean_t can_block = _gf_true; + int allowed = 1; + + GF_VALIDATE_OR_GOTO("locks", this, unwind); + + if (op_ret != 0) { + gf_log(this->name, GF_LOG_ERROR, + "got error (errno=%d, stderror=%s) from child", op_errno, + strerror(op_errno)); + goto unwind; + } + + if (local->op == GF_FOP_TRUNCATE) + inode = local->loc[0].inode; + else + inode = local->fd->inode; + + local->inode = inode_ref(inode); + + pl_inode = pl_inode_get(this, inode, local); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + if (frame->root->pid < 0) + enabled = _gf_false; + else + enabled = pl_is_mandatory_locking_enabled(pl_inode); + + if (enabled) { + region.fl_start = local->offset; + region.fl_end = LLONG_MAX; + region.client = frame->root->client; + region.fd_num = fd_to_fdnum(local->fd); + region.client_pid = frame->root->pid; + region.owner = frame->root->lk_owner; + pthread_mutex_lock(&pl_inode->mutex); + { + allowed = pl_is_fop_allowed(pl_inode, ®ion, local->fd, local->op, + &can_block); + + if (allowed == 1) { + if (pl_inode->mlock_enforced && + pl_inode->track_fop_wind_count) { + pl_inode->fop_wind_count++; + } + goto unlock; + } else if (!can_block) { + op_errno = EAGAIN; + op_ret = -1; + goto unlock; + } + + rw = GF_MALLOC(sizeof(*rw), gf_locks_mt_pl_rw_req_t); + if (!rw) { + op_errno = ENOMEM; + op_ret = -1; + goto unlock; + } + + if (local->op == GF_FOP_TRUNCATE) + rw->stub = fop_truncate_stub(frame, pl_truncate_cont, + &local->loc[0], local->offset, + local->xdata); + else + rw->stub = fop_ftruncate_stub(frame, pl_ftruncate_cont, + local->fd, local->offset, + local->xdata); + if (!rw->stub) { + op_errno = ENOMEM; + op_ret = -1; + GF_FREE(rw); + goto unlock; + } + + rw->region = region; + + list_add_tail(&rw->list, &pl_inode->rw_list); + } + unlock: + pthread_mutex_unlock(&pl_inode->mutex); + } + + if (allowed == 1) { + switch (local->op) { + case GF_FOP_TRUNCATE: + STACK_WIND(frame, pl_truncate_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->truncate, &local->loc[0], + local->offset, local->xdata); + break; + case GF_FOP_FTRUNCATE: + STACK_WIND(frame, pl_truncate_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->ftruncate, local->fd, + local->offset, local->xdata); + break; + default: + break; + } + } +unwind: + if (op_ret == -1) { + gf_log(this ? this->name : "locks", GF_LOG_ERROR, + "truncate failed with " + "ret: %d, error: %s", + op_ret, strerror(op_errno)); + + switch (local->op) { + case GF_FOP_TRUNCATE: + PL_STACK_UNWIND(truncate, xdata, frame, op_ret, op_errno, buf, + NULL, xdata); + break; + case GF_FOP_FTRUNCATE: + PL_STACK_UNWIND(ftruncate, xdata, frame, op_ret, op_errno, buf, + NULL, xdata); + break; + default: + break; + } + } + return 0; +} + +int +pl_truncate(call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset, + dict_t *xdata) +{ + pl_local_t *local = NULL; + int ret = -1; - frame->local = local; + GF_VALIDATE_OR_GOTO("locks", this, unwind); - STACK_WIND (frame, truncate_stat_cbk, FIRST_CHILD(this), - FIRST_CHILD(this)->fops->fstat, fd); - return 0; + local = mem_get0(this->local_pool); + GF_VALIDATE_OR_GOTO(this->name, local, unwind); + + local->op = GF_FOP_TRUNCATE; + local->offset = offset; + loc_copy(&local->loc[0], loc); + if (xdata) + local->xdata = dict_ref(xdata); + + frame->local = local; + + STACK_WIND(frame, truncate_stat_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->stat, loc, NULL); + ret = 0; unwind: - STACK_UNWIND (frame, -1, ENOMEM, NULL); + if (ret == -1) { + gf_log(this ? this->name : "locks", GF_LOG_ERROR, + "truncate on %s failed with" + " ret: %d, error: %s", + loc->path, -1, strerror(ENOMEM)); + STACK_UNWIND_STRICT(truncate, frame, -1, ENOMEM, NULL, NULL, NULL); + } + return 0; +} - return 0; +int +pl_ftruncate(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + dict_t *xdata) +{ + pl_local_t *local = NULL; + int ret = -1; + + GF_VALIDATE_OR_GOTO("locks", this, unwind); + local = mem_get0(this->local_pool); + GF_VALIDATE_OR_GOTO(this->name, local, unwind); + + local->op = GF_FOP_FTRUNCATE; + local->offset = offset; + local->fd = fd_ref(fd); + if (xdata) + local->xdata = dict_ref(xdata); + + frame->local = local; + + STACK_WIND(frame, truncate_stat_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fstat, fd, xdata); + ret = 0; +unwind: + if (ret == -1) { + gf_log(this ? this->name : "locks", GF_LOG_ERROR, + "ftruncate failed with" + " ret: %d, error: %s", + -1, strerror(ENOMEM)); + STACK_UNWIND_STRICT(ftruncate, frame, -1, ENOMEM, NULL, NULL, NULL); + } + return 0; } +int +pl_locks_by_fd(pl_inode_t *pl_inode, fd_t *fd) +{ + posix_lock_t *l = NULL; + int found = 0; + + pthread_mutex_lock(&pl_inode->mutex); + { + list_for_each_entry(l, &pl_inode->ext_list, list) + { + if (l->fd_num == fd_to_fdnum(fd)) { + found = 1; + break; + } + } + } + pthread_mutex_unlock(&pl_inode->mutex); + return found; +} + +static void +delete_locks_of_fd(xlator_t *this, pl_inode_t *pl_inode, fd_t *fd) +{ + posix_lock_t *tmp = NULL; + posix_lock_t *l = NULL; + + struct list_head blocked_list; + + INIT_LIST_HEAD(&blocked_list); + + pthread_mutex_lock(&pl_inode->mutex); + { + list_for_each_entry_safe(l, tmp, &pl_inode->ext_list, list) + { + if (l->fd_num == fd_to_fdnum(fd)) { + if (l->blocked) { + list_move_tail(&l->list, &blocked_list); + continue; + } + __delete_lock(l); + __destroy_lock(l); + } + } + } + pthread_mutex_unlock(&pl_inode->mutex); + + list_for_each_entry_safe(l, tmp, &blocked_list, list) + { + list_del_init(&l->list); + STACK_UNWIND_STRICT(lk, l->frame, -1, EAGAIN, &l->user_flock, NULL); + __destroy_lock(l); + } + + grant_blocked_locks(this, pl_inode); + + do_blocked_rw(pl_inode); +} static void -__delete_locks_of_owner (pl_inode_t *pl_inode, - transport_t *transport, pid_t pid) +__delete_locks_of_owner(pl_inode_t *pl_inode, client_t *client, + gf_lkowner_t *owner) +{ + posix_lock_t *tmp = NULL; + posix_lock_t *l = NULL; + + /* TODO: what if it is a blocked lock with pending l->frame */ + + list_for_each_entry_safe(l, tmp, &pl_inode->ext_list, list) + { + if (l->blocked) + continue; + if ((l->client == client) && is_same_lkowner(&l->owner, owner)) { + gf_log("posix-locks", GF_LOG_TRACE, + " Flushing lock" + "%s (pid=%d) (lk-owner=%s) %" PRId64 " - %" PRId64 + " state: %s", + l->fl_type == F_UNLCK ? "Unlock" : "Lock", l->client_pid, + lkowner_utoa(&l->owner), l->user_flock.l_start, + l->user_flock.l_len, l->blocked == 1 ? "Blocked" : "Active"); + + __delete_lock(l); + __destroy_lock(l); + } + } + + return; +} + +int32_t +pl_getxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *dict, dict_t *xdata) +{ + STACK_UNWIND_STRICT(getxattr, frame, op_ret, op_errno, dict, xdata); + return 0; +} + +static int32_t +pl_getxattr_clrlk(xlator_t *this, const char *name, inode_t *inode, + dict_t **dict, int32_t *op_errno) +{ + int32_t bcount = 0; + int32_t gcount = 0; + char *key = NULL; + char *lk_summary = NULL; + pl_inode_t *pl_inode = NULL; + clrlk_args args = { + 0, + }; + char *brickname = NULL; + int32_t op_ret = -1; + + *op_errno = EINVAL; + + if (clrlk_parse_args(name, &args)) { + *op_errno = EINVAL; + goto out; + } + + *dict = dict_new(); + if (!*dict) { + *op_errno = ENOMEM; + goto out; + } + + pl_inode = pl_inode_get(this, inode, NULL); + if (!pl_inode) { + *op_errno = ENOMEM; + goto out; + } + + switch (args.type) { + case CLRLK_INODE: + case CLRLK_ENTRY: + op_ret = clrlk_clear_lks_in_all_domains(this, pl_inode, &args, + &bcount, &gcount, op_errno); + break; + case CLRLK_POSIX: + op_ret = clrlk_clear_posixlk(this, pl_inode, &args, &bcount, + &gcount, op_errno); + break; + default: + op_ret = -1; + *op_errno = EINVAL; + } + if (op_ret) { + if (args.type >= CLRLK_TYPE_MAX) { + gf_log(this->name, GF_LOG_ERROR, + "clear locks: invalid lock type %d", args.type); + } else { + gf_log(this->name, GF_LOG_ERROR, + "clear locks of type %s failed: %s", + clrlk_type_names[args.type], strerror(*op_errno)); + } + + goto out; + } + + op_ret = fetch_pathinfo(this, inode, op_errno, &brickname); + if (op_ret) { + gf_log(this->name, GF_LOG_WARNING, "Couldn't get brickname"); + } else { + op_ret = format_brickname(brickname); + if (op_ret) { + gf_log(this->name, GF_LOG_WARNING, "Couldn't format brickname"); + GF_FREE(brickname); + brickname = NULL; + } + } + + if (!gcount && !bcount) { + if (gf_asprintf(&lk_summary, "No locks cleared.") == -1) { + op_ret = -1; + *op_errno = ENOMEM; + goto out; + } + } else if (gf_asprintf(&lk_summary, + "%s: %s blocked locks=%d " + "granted locks=%d", + (brickname == NULL) ? this->name : brickname, + clrlk_type_names[args.type], bcount, gcount) == -1) { + op_ret = -1; + *op_errno = ENOMEM; + goto out; + } + gf_log(this->name, GF_LOG_DEBUG, "%s", lk_summary); + + key = gf_strdup(name); + if (!key) { + op_ret = -1; + goto out; + } + if (dict_set_dynstr(*dict, key, lk_summary)) { + op_ret = -1; + *op_errno = ENOMEM; + goto out; + } + + op_ret = 0; + +out: + GF_FREE(brickname); + GF_FREE(args.opts); + GF_FREE(key); + if (op_ret) { + GF_FREE(lk_summary); + } + + return op_ret; +} + +int32_t +pl_getxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, const char *name, + dict_t *xdata) +{ + int32_t op_errno = EINVAL; + int32_t op_ret = -1; + dict_t *dict = NULL; + + if (!name) + goto usual; + + if (strncmp(name, GF_XATTR_CLRLK_CMD, SLEN(GF_XATTR_CLRLK_CMD))) + goto usual; + + op_ret = pl_getxattr_clrlk(this, name, loc->inode, &dict, &op_errno); + + STACK_UNWIND_STRICT(getxattr, frame, op_ret, op_errno, dict, xdata); + + if (dict) + dict_unref(dict); + return 0; + +usual: + STACK_WIND(frame, pl_getxattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->getxattr, loc, name, xdata); + return 0; +} + +static int +format_brickname(char *brickname) { - posix_lock_t *tmp = NULL; - posix_lock_t *l = NULL; + int ret = -1; + char *hostname = NULL; + char *volume = NULL; + char *saveptr = NULL; - /* TODO: what if it is a blocked lock with pending l->frame */ + if (!brickname) + goto out; - list_for_each_entry_safe (l, tmp, &pl_inode->ext_list, list) { - if ((l->transport == transport) - && (l->client_pid == pid)) { - __delete_lock (pl_inode, l); - __destroy_lock (l); - } - } + strtok_r(brickname, ":", &saveptr); + hostname = gf_strdup(strtok_r(NULL, ":", &saveptr)); + if (hostname == NULL) + goto out; + volume = gf_strdup(strtok_r(NULL, ".", &saveptr)); + if (volume == NULL) + goto out; - list_for_each_entry_safe (l, tmp, &pl_inode->int_list, list) { - if ((l->transport == transport) - && (l->client_pid == pid)) { - __delete_lock (pl_inode, l); - __destroy_lock (l); - } - } + sprintf(brickname, "%s:%s", hostname, volume); - return; + ret = 0; +out: + GF_FREE(hostname); + GF_FREE(volume); + return ret; } +static int +fetch_pathinfo(xlator_t *this, inode_t *inode, int32_t *op_errno, + char **brickname) +{ + int ret = -1; + loc_t loc = { + 0, + }; + dict_t *dict = NULL; + + if (!brickname) + goto out; + + if (!op_errno) + goto out; + + gf_uuid_copy(loc.gfid, inode->gfid); + loc.inode = inode_ref(inode); + + ret = syncop_getxattr(FIRST_CHILD(this), &loc, &dict, GF_XATTR_PATHINFO_KEY, + NULL, NULL); + if (ret < 0) { + *op_errno = -ret; + ret = -1; + goto out; + } + + ret = dict_get_str_sizen(dict, GF_XATTR_PATHINFO_KEY, brickname); + if (ret) + goto out; + + *brickname = gf_strdup(*brickname); + if (*brickname == NULL) { + ret = -1; + goto out; + } + + ret = 0; +out: + if (dict != NULL) { + dict_unref(dict); + } + loc_wipe(&loc); + + return ret; +} int -pl_flush_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno) +pl_lockinfo_get_brickname(xlator_t *this, inode_t *inode, int32_t *op_errno) { - STACK_UNWIND (frame, op_ret, op_errno); + posix_locks_private_t *priv = this->private; + char *brickname = NULL; + char *end = NULL; + char *tmp = NULL; + + int ret = fetch_pathinfo(this, inode, op_errno, &brickname); + if (ret) + goto out; + + end = strrchr(brickname, ':'); + if (!end) { + GF_FREE(brickname); + ret = -1; + goto out; + } + + tmp = brickname; + brickname = gf_strndup(brickname, (end - brickname)); + if (brickname == NULL) { + ret = -1; + goto out; + } + + priv->brickname = brickname; + ret = 0; +out: + GF_FREE(tmp); + return ret; +} - return 0; +char * +pl_lockinfo_key(xlator_t *this, inode_t *inode, int32_t *op_errno) +{ + posix_locks_private_t *priv = this->private; + char *key = NULL; + int ret = 0; + + if (priv->brickname == NULL) { + ret = pl_lockinfo_get_brickname(this, inode, op_errno); + if (ret < 0) { + gf_log(this->name, GF_LOG_WARNING, "cannot get brickname"); + goto out; + } + } + + key = priv->brickname; +out: + return key; } +int32_t +pl_fgetxattr_handle_lockinfo(xlator_t *this, fd_t *fd, dict_t *dict, + int32_t *op_errno) +{ + char *key = NULL, *buf = NULL; + int32_t op_ret = 0; + unsigned long fdnum = 0; + int32_t len = 0; + dict_t *tmp = NULL; + + pl_inode_t *pl_inode = pl_inode_get(this, fd->inode, NULL); + + if (!pl_inode) { + gf_log(this->name, GF_LOG_DEBUG, "Could not get inode."); + *op_errno = EBADFD; + op_ret = -1; + goto out; + } + + if (!pl_locks_by_fd(pl_inode, fd)) { + op_ret = 0; + goto out; + } + + fdnum = fd_to_fdnum(fd); + + key = pl_lockinfo_key(this, fd->inode, op_errno); + if (key == NULL) { + op_ret = -1; + goto out; + } + + tmp = dict_new(); + if (tmp == NULL) { + op_ret = -1; + *op_errno = ENOMEM; + goto out; + } + + op_ret = dict_set_uint64(tmp, key, fdnum); + if (op_ret < 0) { + *op_errno = -op_ret; + op_ret = -1; + gf_log(this->name, GF_LOG_WARNING, + "setting lockinfo value " + "(%lu) for fd (ptr:%p inode-gfid:%s) failed (%s)", + fdnum, fd, uuid_utoa(fd->inode->gfid), strerror(*op_errno)); + goto out; + } + + op_ret = dict_allocate_and_serialize(tmp, (char **)&buf, + (unsigned int *)&len); + if (op_ret != 0) { + *op_errno = -op_ret; + op_ret = -1; + gf_log(this->name, GF_LOG_WARNING, + "dict_serialized_length failed (%s) while handling " + "lockinfo for fd (ptr:%p inode-gfid:%s)", + strerror(*op_errno), fd, uuid_utoa(fd->inode->gfid)); + goto out; + } + + op_ret = dict_set_dynptr(dict, GF_XATTR_LOCKINFO_KEY, buf, len); + if (op_ret < 0) { + *op_errno = -op_ret; + op_ret = -1; + gf_log(this->name, GF_LOG_WARNING, + "setting lockinfo value " + "(%lu) for fd (ptr:%p inode-gfid:%s) failed (%s)", + fdnum, fd, uuid_utoa(fd->inode->gfid), strerror(*op_errno)); + goto out; + } + + buf = NULL; +out: + if (tmp != NULL) { + dict_unref(tmp); + } + + if (buf != NULL) { + GF_FREE(buf); + } -int -pl_flush (call_frame_t *frame, xlator_t *this, - fd_t *fd) + return op_ret; +} + +int32_t +pl_fgetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, const char *name, + dict_t *xdata) +{ + int32_t op_ret = 0, op_errno = 0; + dict_t *dict = NULL; + + if (!name) { + goto usual; + } + + if (strcmp(name, GF_XATTR_LOCKINFO_KEY) == 0) { + dict = dict_new(); + if (dict == NULL) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + op_ret = pl_fgetxattr_handle_lockinfo(this, fd, dict, &op_errno); + if (op_ret < 0) { + gf_log(this->name, GF_LOG_WARNING, + "getting lockinfo on fd (ptr:%p inode-gfid:%s) " + "failed (%s)", + fd, uuid_utoa(fd->inode->gfid), strerror(op_errno)); + } + + goto unwind; + } else if (strncmp(name, GF_XATTR_CLRLK_CMD, SLEN(GF_XATTR_CLRLK_CMD)) == + 0) { + op_ret = pl_getxattr_clrlk(this, name, fd->inode, &dict, &op_errno); + + goto unwind; + } else { + goto usual; + } + +unwind: + STACK_UNWIND_STRICT(fgetxattr, frame, op_ret, op_errno, dict, NULL); + if (dict != NULL) { + dict_unref(dict); + } + + return 0; + +usual: + STACK_WIND(frame, default_fgetxattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fgetxattr, fd, name, xdata); + return 0; +} + +int32_t +pl_migrate_locks(call_frame_t *frame, fd_t *newfd, uint64_t oldfd_num, + int32_t *op_errno) +{ + posix_lock_t *l = NULL; + int32_t op_ret = 0; + uint64_t newfd_num = fd_to_fdnum(newfd); + + pl_inode_t *pl_inode = pl_inode_get(frame->this, newfd->inode, NULL); + if (pl_inode == NULL) { + op_ret = -1; + *op_errno = EBADFD; + goto out; + } + + pthread_mutex_lock(&pl_inode->mutex); + { + list_for_each_entry(l, &pl_inode->ext_list, list) + { + if (l->fd_num == oldfd_num) { + l->fd_num = newfd_num; + l->client = frame->root->client; + } + } + } + pthread_mutex_unlock(&pl_inode->mutex); + + op_ret = 0; +out: + return op_ret; +} + +int32_t +pl_fsetxattr_handle_lockinfo(call_frame_t *frame, fd_t *fd, char *lockinfo_buf, + int len, int32_t *op_errno) +{ + int32_t op_ret = -1; + uint64_t oldfd_num = 0; + char *key = NULL; + + dict_t *lockinfo = dict_new(); + if (lockinfo == NULL) { + op_ret = -1; + *op_errno = ENOMEM; + goto out; + } + + op_ret = dict_unserialize(lockinfo_buf, len, &lockinfo); + if (op_ret < 0) { + *op_errno = -op_ret; + op_ret = -1; + goto out; + } + + key = pl_lockinfo_key(frame->this, fd->inode, op_errno); + if (key == NULL) { + op_ret = -1; + goto out; + } + + op_ret = dict_get_uint64(lockinfo, key, &oldfd_num); + + if (oldfd_num == 0) { + op_ret = 0; + goto out; + } + + op_ret = pl_migrate_locks(frame, fd, oldfd_num, op_errno); + if (op_ret < 0) { + gf_log(frame->this->name, GF_LOG_WARNING, + "migration of locks from oldfd (ptr:%p) to newfd " + "(ptr:%p) (inode-gfid:%s)", + (void *)(uintptr_t)oldfd_num, fd, uuid_utoa(fd->inode->gfid)); + goto out; + } + +out: + dict_unref(lockinfo); + + return op_ret; +} + +int32_t +pl_fsetxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + pl_local_t *local = NULL; + pl_inode_t *pl_inode = NULL; + + local = frame->local; + if (local && local->update_mlock_enforced_flag && op_ret != -1) { + pl_inode = pl_inode_get(this, local->inode, NULL); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + pthread_mutex_lock(&pl_inode->mutex); + { + pl_inode->mlock_enforced = _gf_true; + pl_inode->check_mlock_info = _gf_false; + } + pthread_mutex_unlock(&pl_inode->mutex); + } + +unwind: + PL_STACK_UNWIND_FOR_CLIENT(fsetxattr, xdata, frame, op_ret, op_errno, + xdata); + return 0; +} + +int32_t +pl_fsetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict, + int32_t flags, dict_t *xdata) { - posix_locks_private_t *priv = NULL; - pl_inode_t *pl_inode = NULL; + int32_t op_errno = 0; + void *lockinfo_buf = NULL; + int len = 0; + char *name = NULL; + posix_locks_private_t *priv = this->private; + + int32_t op_ret = dict_get_ptr_and_len(dict, GF_XATTR_LOCKINFO_KEY, + &lockinfo_buf, &len); + if (lockinfo_buf == NULL) { + goto usual; + } + + op_ret = pl_fsetxattr_handle_lockinfo(frame, fd, lockinfo_buf, len, + &op_errno); + if (op_ret < 0) { + goto unwind; + } + +usual: + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + + PL_CHECK_LOCK_ENFORCE_KEY(frame, dict, name, this, ((loc_t *)NULL), fd, + priv); + + STACK_WIND(frame, pl_fsetxattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fsetxattr, fd, dict, flags, xdata); + return 0; - priv = this->private; +unwind: + PL_STACK_UNWIND_FOR_CLIENT(fsetxattr, xdata, frame, op_ret, op_errno, NULL); - pl_inode = pl_inode_get (this, fd->inode); + return 0; +} - if (!pl_inode) { - gf_log (this->name, GF_LOG_ERROR, "returning EBADFD"); - STACK_UNWIND (frame, -1, EBADFD); - return 0; - } +int32_t +pl_opendir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, fd_t *fd, dict_t *xdata) +{ + pl_fdctx_t *fdctx = NULL; - pthread_mutex_lock (&pl_inode->mutex); - { - __delete_locks_of_owner (pl_inode, frame->root->trans, - frame->root->pid); - } - pthread_mutex_unlock (&pl_inode->mutex); + if (op_ret < 0) + goto unwind; - grant_blocked_locks (this, pl_inode, GF_LOCK_POSIX); - grant_blocked_locks (this, pl_inode, GF_LOCK_INTERNAL); + fdctx = pl_check_n_create_fdctx(this, fd); + if (!fdctx) { + op_errno = ENOMEM; + op_ret = -1; + goto unwind; + } - do_blocked_rw (pl_inode); +unwind: + PL_STACK_UNWIND(opendir, xdata, frame, op_ret, op_errno, fd, xdata); - STACK_WIND (frame, pl_flush_cbk, FIRST_CHILD(this), - FIRST_CHILD(this)->fops->flush, fd); - return 0; + return 0; } +int32_t +pl_opendir(call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd, + dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_opendir_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->opendir, loc, fd, xdata); + return 0; +} int -pl_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, fd_t *fd) +pl_flush_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, dict_t *xdata) { - STACK_UNWIND (frame, op_ret, op_errno, fd); + PL_STACK_UNWIND_FOR_CLIENT(flush, xdata, frame, op_ret, op_errno, xdata); - return 0; + return 0; } +int +pl_flush(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata) +{ + pl_inode_t *pl_inode = pl_inode_get(this, fd->inode, NULL); + if (!pl_inode) { + gf_log(this->name, GF_LOG_DEBUG, "Could not get inode."); + STACK_UNWIND_STRICT(flush, frame, -1, EBADFD, NULL); + return 0; + } + + pthread_mutex_lock(&pl_inode->mutex); + { + if (pl_inode->migrated) { + pthread_mutex_unlock(&pl_inode->mutex); + STACK_UNWIND_STRICT(flush, frame, -1, EREMOTE, NULL); + return 0; + } + } + pthread_mutex_unlock(&pl_inode->mutex); + + pl_trace_flush(this, frame, fd); + + if (frame->root->lk_owner.len == 0) { + /* Handle special case when protocol/server sets lk-owner to zero. + * This usually happens due to a client disconnection. Hence, free + * all locks opened with this fd. + */ + gf_log(this->name, GF_LOG_TRACE, "Releasing all locks with fd %p", fd); + delete_locks_of_fd(this, pl_inode, fd); + goto wind; + } + pthread_mutex_lock(&pl_inode->mutex); + { + __delete_locks_of_owner(pl_inode, frame->root->client, + &frame->root->lk_owner); + } + pthread_mutex_unlock(&pl_inode->mutex); + + grant_blocked_locks(this, pl_inode); + + do_blocked_rw(pl_inode); + +wind: + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_flush_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->flush, fd, xdata); + return 0; +} int -pl_open (call_frame_t *frame, xlator_t *this, - loc_t *loc, int32_t flags, fd_t *fd) +pl_open_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, fd_t *fd, dict_t *xdata) { - /* why isn't O_TRUNC being handled ? */ - STACK_WIND (frame, pl_open_cbk, - FIRST_CHILD(this), FIRST_CHILD(this)->fops->open, - loc, flags & ~O_TRUNC, fd); + pl_fdctx_t *fdctx = NULL; + + if (op_ret < 0) + goto unwind; + + fdctx = pl_check_n_create_fdctx(this, fd); + if (!fdctx) { + op_errno = ENOMEM; + op_ret = -1; + goto unwind; + } + +unwind: + STACK_UNWIND_STRICT(open, frame, op_ret, op_errno, fd, xdata); - return 0; + return 0; } +int +pl_open(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, + fd_t *fd, dict_t *xdata) +{ + int op_ret = -1; + int op_errno = EINVAL; + pl_inode_t *pl_inode = NULL; + posix_lock_t *l = NULL; + posix_locks_private_t *priv = this->private; + + GF_VALIDATE_OR_GOTO("locks", this, unwind); + + op_ret = 0, op_errno = 0; + pl_inode = pl_inode_get(this, fd->inode, NULL); + if (!pl_inode) { + gf_msg(this->name, GF_LOG_ERROR, 0, ENOMEM, "Could not get inode"); + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + /* As per design, under forced and file-based mandatory locking modes + * it doesn't matter whether inodes's lock list contain advisory or + * mandatory type locks. So we just check whether inode's lock list is + * empty or not to make sure that no locks are being held for the file. + * Whereas under optimal mandatory locking mode, we strictly fail open + * if and only if lock list contain mandatory locks. + */ + if (((priv->mandatory_mode == MLK_FILE_BASED) && pl_inode->mandatory) || + priv->mandatory_mode == MLK_FORCED) { + if (fd->flags & O_TRUNC) { + pthread_mutex_lock(&pl_inode->mutex); + { + if (!list_empty(&pl_inode->ext_list)) { + op_ret = -1; + op_errno = EAGAIN; + } + } + pthread_mutex_unlock(&pl_inode->mutex); + } + } else if (priv->mandatory_mode == MLK_OPTIMAL) { + if (fd->flags & O_TRUNC) { + pthread_mutex_lock(&pl_inode->mutex); + { + list_for_each_entry(l, &pl_inode->ext_list, list) + { + if ((l->lk_flags & GF_LK_MANDATORY)) { + op_ret = -1; + op_errno = EAGAIN; + break; + } + } + } + pthread_mutex_unlock(&pl_inode->mutex); + } + } + +unwind: + if (op_ret == -1) + STACK_UNWIND_STRICT(open, frame, op_ret, op_errno, NULL, NULL); + else + STACK_WIND(frame, pl_open_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata); + return 0; +} int -pl_create_cbk (call_frame_t *frame, void *cookie, - xlator_t *this, int32_t op_ret, int32_t op_errno, - fd_t *fd, inode_t *inode, struct stat *buf) +pl_create_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, fd_t *fd, inode_t *inode, struct iatt *buf, + struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { - STACK_UNWIND (frame, op_ret, op_errno, fd, inode, buf); + pl_fdctx_t *fdctx = NULL; + + if (op_ret < 0) + goto unwind; + + fdctx = pl_check_n_create_fdctx(this, fd); + if (!fdctx) { + op_errno = ENOMEM; + op_ret = -1; + goto unwind; + } + +unwind: + PL_STACK_UNWIND(create, xdata, frame, op_ret, op_errno, fd, inode, buf, + preparent, postparent, xdata); - return 0; + return 0; } +int +pl_create(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, + mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + + STACK_WIND(frame, pl_create_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->create, loc, flags, mode, umask, fd, + xdata); + return 0; +} int -pl_create (call_frame_t *frame, xlator_t *this, - loc_t *loc, int32_t flags, mode_t mode, fd_t *fd) +pl_readv_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, struct iovec *vector, int32_t count, + struct iatt *stbuf, struct iobref *iobref, dict_t *xdata) { - STACK_WIND (frame, pl_create_cbk, - FIRST_CHILD (this), FIRST_CHILD (this)->fops->create, - loc, flags, mode, fd); - return 0; + pl_track_io_fop_count(frame->local, this, DECREMENT); + + PL_STACK_UNWIND(readv, xdata, frame, op_ret, op_errno, vector, count, stbuf, + iobref, xdata); + + return 0; +} + +int +pl_writev_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, struct iatt *prebuf, struct iatt *postbuf, + dict_t *xdata) +{ + pl_track_io_fop_count(frame->local, this, DECREMENT); + + PL_STACK_UNWIND(writev, xdata, frame, op_ret, op_errno, prebuf, postbuf, + xdata); + + return 0; +} + +void +do_blocked_rw(pl_inode_t *pl_inode) +{ + struct list_head wind_list; + pl_rw_req_t *rw = NULL; + pl_rw_req_t *tmp = NULL; + + INIT_LIST_HEAD(&wind_list); + + pthread_mutex_lock(&pl_inode->mutex); + { + list_for_each_entry_safe(rw, tmp, &pl_inode->rw_list, list) + { + if (__rw_allowable(pl_inode, &rw->region, rw->stub->fop)) { + list_del_init(&rw->list); + list_add_tail(&rw->list, &wind_list); + if (pl_inode->mlock_enforced && + pl_inode->track_fop_wind_count) { + pl_inode->fop_wind_count++; + } + } + } + } + pthread_mutex_unlock(&pl_inode->mutex); + + list_for_each_entry_safe(rw, tmp, &wind_list, list) + { + list_del_init(&rw->list); + call_resume(rw->stub); + GF_FREE(rw); + } + + return; } +/* when mandatory lock is enforced: + If an IO request comes on a region which is out of the boundary of the + granted mandatory lock, it will be rejected. + + Note: There is no IO blocking with mandatory lock enforced as it may be + a stale data from an old client. + */ +gf_boolean_t static within_range(posix_lock_t *existing, posix_lock_t *new) +{ + if (existing->fl_start <= new->fl_start && existing->fl_end >= new->fl_end) + return _gf_true; + + return _gf_false; +} + +static int +__rw_allowable(pl_inode_t *pl_inode, posix_lock_t *region, glusterfs_fop_t op) +{ + posix_lock_t *l = NULL; + posix_locks_private_t *priv = THIS->private; + int ret = 1; + + if (pl_inode->mlock_enforced) { + list_for_each_entry(l, &pl_inode->ext_list, list) + { + /* + with lock enforced (fencing) there should not be any blocking + lock coexisting. + */ + if (same_owner(l, region)) { + /* Should range check be strict for same owner with fencing? */ + if (locks_overlap(l, region)) { + if (within_range(l, region)) { + return 1; + } else { + /* + Should we allow read fop if it does not fit it in the + range? + if (op == GF_FOP_READ && l->fl_type != F_WRLCK) { + return 1; + } + */ + return 0; + } + } + } else { + if (locks_overlap(l, region)) { + /* + with fencing should a read from a different owner be + allowed if the mandatory lock taken is F_RDLCK? + if (op == GF_FOP_READ && l->fl_type != F_WRLCK) { + return 1; + } + */ + return 0; + } + } + } + + /* No lock has been taken by this owner */ + return 0; + } + + list_for_each_entry(l, &pl_inode->ext_list, list) + { + if (!l->blocked && locks_overlap(l, region) && !same_owner(l, region)) { + if ((op == GF_FOP_READ) && (l->fl_type != F_WRLCK)) + continue; + /* Check for mandatory lock under optimal + * mandatory-locking mode */ + if (priv->mandatory_mode == MLK_OPTIMAL && + !(l->lk_flags & GF_LK_MANDATORY)) + continue; + ret = 0; + break; + } + } + + return ret; +} int -pl_readv_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, - struct iovec *vector, int32_t count, struct stat *stbuf, - struct iobref *iobref) +pl_readv_cont(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, + off_t offset, uint32_t flags, dict_t *xdata) { - STACK_UNWIND (frame, op_ret, op_errno, vector, count, stbuf, iobref); + pl_track_io_fop_count(frame->local, this, INCREMENT); + + STACK_WIND(frame, pl_readv_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readv, fd, size, offset, flags, xdata); - return 0; + return 0; } int -pl_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, struct stat *stbuf) +pl_readv(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, + off_t offset, uint32_t flags, dict_t *xdata) { - STACK_UNWIND (frame, op_ret, op_errno, stbuf); + pl_local_t *local = NULL; + pl_inode_t *pl_inode = NULL; + pl_rw_req_t *rw = NULL; + posix_lock_t region = { + .list = + { + 0, + }, + }; + gf_boolean_t enabled = _gf_false; + gf_boolean_t can_block = _gf_true; + int op_ret = 0; + int op_errno = 0; + int allowed = 1; + + GF_VALIDATE_OR_GOTO("locks", this, unwind); + + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + + if (!frame->local) { + frame->local = mem_get0(this->local_pool); + local = frame->local; + local->inode = inode_ref(fd->inode); + local->fd = fd_ref(fd); + } + + pl_inode = pl_inode_get(this, fd->inode, local); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + if (frame->root->pid < 0) + enabled = _gf_false; + else + enabled = pl_is_mandatory_locking_enabled(pl_inode); + + if (enabled) { + region.fl_start = offset; + region.fl_end = offset + size - 1; + region.client = frame->root->client; + region.fd_num = fd_to_fdnum(fd); + region.client_pid = frame->root->pid; + region.owner = frame->root->lk_owner; + + pthread_mutex_lock(&pl_inode->mutex); + { + allowed = pl_is_fop_allowed(pl_inode, ®ion, fd, GF_FOP_READ, + &can_block); + if (allowed == 1) { + if (pl_inode->mlock_enforced && + pl_inode->track_fop_wind_count) { + pl_inode->fop_wind_count++; + } + goto unlock; + } else if (!can_block) { + op_errno = EAGAIN; + op_ret = -1; + goto unlock; + } + + rw = GF_MALLOC(sizeof(*rw), gf_locks_mt_pl_rw_req_t); + if (!rw) { + op_errno = ENOMEM; + op_ret = -1; + goto unlock; + } + + rw->stub = fop_readv_stub(frame, pl_readv_cont, fd, size, offset, + flags, xdata); + if (!rw->stub) { + op_errno = ENOMEM; + op_ret = -1; + GF_FREE(rw); + goto unlock; + } + + rw->region = region; + + list_add_tail(&rw->list, &pl_inode->rw_list); + } + unlock: + pthread_mutex_unlock(&pl_inode->mutex); + } + + if (allowed == 1) { + STACK_WIND(frame, pl_readv_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readv, fd, size, offset, flags, + xdata); + } +unwind: + if (op_ret == -1) + PL_STACK_UNWIND(readv, xdata, frame, op_ret, op_errno, NULL, 0, NULL, + NULL, NULL); - return 0; + return 0; } +int +pl_writev_cont(call_frame_t *frame, xlator_t *this, fd_t *fd, + struct iovec *vector, int count, off_t offset, uint32_t flags, + struct iobref *iobref, dict_t *xdata) +{ + pl_track_io_fop_count(frame->local, this, INCREMENT); + + STACK_WIND(frame, pl_writev_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->writev, fd, vector, count, offset, + flags, iobref, xdata); -void -do_blocked_rw (pl_inode_t *pl_inode) + return 0; +} + +int +pl_writev(call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector, + int32_t count, off_t offset, uint32_t flags, struct iobref *iobref, + dict_t *xdata) { - struct list_head wind_list; - pl_rw_req_t *rw = NULL; - pl_rw_req_t *tmp = NULL; + pl_local_t *local = NULL; + pl_inode_t *pl_inode = NULL; + pl_rw_req_t *rw = NULL; + posix_lock_t region = { + .list = + { + 0, + }, + }; + gf_boolean_t enabled = _gf_false; + gf_boolean_t can_block = _gf_true; + int op_ret = 0; + int op_errno = 0; + int allowed = 1; + + GF_VALIDATE_OR_GOTO("locks", this, unwind); + + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + + if (!frame->local) { + frame->local = mem_get0(this->local_pool); + local = frame->local; + local->inode = inode_ref(fd->inode); + local->fd = fd_ref(fd); + } + + pl_inode = pl_inode_get(this, fd->inode, local); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + if (frame->root->pid < 0) + enabled = _gf_false; + else + enabled = pl_is_mandatory_locking_enabled(pl_inode); + + if (enabled) { + region.fl_start = offset; + region.fl_end = offset + iov_length(vector, count) - 1; + region.client = frame->root->client; + region.fd_num = fd_to_fdnum(fd); + region.client_pid = frame->root->pid; + region.owner = frame->root->lk_owner; + + pthread_mutex_lock(&pl_inode->mutex); + { + allowed = pl_is_fop_allowed(pl_inode, ®ion, fd, GF_FOP_WRITE, + &can_block); + if (allowed == 1) { + if (pl_inode->mlock_enforced && + pl_inode->track_fop_wind_count) { + pl_inode->fop_wind_count++; + } + goto unlock; + } else if (!can_block) { + if (pl_inode->mlock_enforced) { + op_errno = EBUSY; + } else { + op_errno = EAGAIN; + } - INIT_LIST_HEAD (&wind_list); + op_ret = -1; + goto unlock; + } + + rw = GF_MALLOC(sizeof(*rw), gf_locks_mt_pl_rw_req_t); + if (!rw) { + op_errno = ENOMEM; + op_ret = -1; + goto unlock; + } + + rw->stub = fop_writev_stub(frame, pl_writev_cont, fd, vector, count, + offset, flags, iobref, xdata); + if (!rw->stub) { + op_errno = ENOMEM; + op_ret = -1; + GF_FREE(rw); + goto unlock; + } + + rw->region = region; + + list_add_tail(&rw->list, &pl_inode->rw_list); + } + unlock: + pthread_mutex_unlock(&pl_inode->mutex); + } + + if (allowed == 1) { + STACK_WIND(frame, pl_writev_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->writev, fd, vector, count, offset, + flags, iobref, xdata); + } +unwind: + if (op_ret == -1) + PL_STACK_UNWIND(writev, xdata, frame, op_ret, op_errno, NULL, NULL, + NULL); - pthread_mutex_lock (&pl_inode->mutex); - { - list_for_each_entry_safe (rw, tmp, &pl_inode->rw_list, list) { - if (__rw_allowable (pl_inode, &rw->region, - rw->stub->fop)) { - list_del_init (&rw->list); - list_add_tail (&rw->list, &wind_list); - } - } - } - pthread_mutex_unlock (&pl_inode->mutex); + return 0; +} + +static int +__fd_has_locks(pl_inode_t *pl_inode, fd_t *fd) +{ + posix_lock_t *l = NULL; - list_for_each_entry_safe (rw, tmp, &wind_list, list) { - list_del_init (&rw->list); - call_resume (rw->stub); - free (rw); - } + list_for_each_entry(l, &pl_inode->ext_list, list) + { + if (l->fd_num == fd_to_fdnum(fd)) { + return 1; + } + } - return; + return 0; } +static posix_lock_t * +lock_dup(posix_lock_t *lock) +{ + int32_t op_errno = 0; + return new_posix_lock(&lock->user_flock, lock->client, lock->client_pid, + &lock->owner, (fd_t *)lock->fd_num, lock->lk_flags, + lock->blocking, &op_errno); +} static int -__rw_allowable (pl_inode_t *pl_inode, posix_lock_t *region, - glusterfs_fop_t op) +__dup_locks_to_fdctx(pl_inode_t *pl_inode, fd_t *fd, pl_fdctx_t *fdctx) { - posix_lock_t *l = NULL; - int ret = 1; + posix_lock_t *l = NULL; + posix_lock_t *duplock = NULL; + int ret = 0; + + list_for_each_entry(l, &pl_inode->ext_list, list) + { + if (l->fd_num == fd_to_fdnum(fd)) { + duplock = lock_dup(l); + if (!duplock) { + ret = -1; + break; + } + + list_add_tail(&duplock->list, &fdctx->locks_list); + } + } + + return ret; +} - list_for_each_entry (l, &pl_inode->ext_list, list) { - if (locks_overlap (l, region) && !same_owner (l, region)) { - if ((op == GF_FOP_READ) && (l->fl_type != F_WRLCK)) - continue; - ret = 0; - break; - } - } +static int +__copy_locks_to_fdctx(pl_inode_t *pl_inode, fd_t *fd, pl_fdctx_t *fdctx) +{ + return __dup_locks_to_fdctx(pl_inode, fd, fdctx); +} - return ret; +static void +pl_mark_eol_lock(posix_lock_t *lock) +{ + lock->user_flock.l_type = GF_LK_EOL; + return; +} + +static posix_lock_t * +__get_next_fdctx_lock(pl_fdctx_t *fdctx) +{ + posix_lock_t *lock = NULL; + + GF_ASSERT(fdctx); + + if (list_empty(&fdctx->locks_list)) { + gf_log(THIS->name, GF_LOG_DEBUG, "fdctx lock list empty"); + goto out; + } + + lock = list_entry(fdctx->locks_list.next, typeof(*lock), list); + + GF_ASSERT(lock); + + list_del_init(&lock->list); + +out: + return lock; +} + +static int +__set_next_lock_fd(pl_fdctx_t *fdctx, posix_lock_t *reqlock) +{ + posix_lock_t *lock = NULL; + int ret = 0; + + GF_ASSERT(fdctx); + + lock = __get_next_fdctx_lock(fdctx); + if (!lock) { + gf_log(THIS->name, GF_LOG_DEBUG, "marking EOL in reqlock"); + pl_mark_eol_lock(reqlock); + goto out; + } + + reqlock->user_flock = lock->user_flock; + reqlock->fl_start = lock->fl_start; + reqlock->fl_type = lock->fl_type; + reqlock->fl_end = lock->fl_end; + reqlock->owner = lock->owner; + +out: + if (lock) + __destroy_lock(lock); + + return ret; +} + +static int +pl_getlk_fd(xlator_t *this, pl_inode_t *pl_inode, fd_t *fd, + posix_lock_t *reqlock) +{ + uint64_t tmp = 0; + pl_fdctx_t *fdctx = NULL; + int ret = 0; + + pthread_mutex_lock(&pl_inode->mutex); + { + if (!__fd_has_locks(pl_inode, fd)) { + pthread_mutex_unlock(&pl_inode->mutex); + gf_log(this->name, GF_LOG_DEBUG, "fd=%p has no active locks", fd); + ret = 0; + goto out; + } + + gf_log(this->name, GF_LOG_DEBUG, "There are active locks on fd"); + + ret = fd_ctx_get(fd, this, &tmp); + fdctx = (pl_fdctx_t *)(long)tmp; + + if (list_empty(&fdctx->locks_list)) { + gf_log(this->name, GF_LOG_TRACE, + "no fdctx -> copying all locks on fd"); + + ret = __copy_locks_to_fdctx(pl_inode, fd, fdctx); + if (ret) { + goto unlock; + } + + ret = __set_next_lock_fd(fdctx, reqlock); + + } else { + gf_log(this->name, GF_LOG_TRACE, + "fdctx present -> returning the next lock"); + ret = __set_next_lock_fd(fdctx, reqlock); + if (ret) { + pthread_mutex_unlock(&pl_inode->mutex); + gf_log(this->name, GF_LOG_DEBUG, + "could not get next lock of fd"); + goto out; + } + } + } + +unlock: + pthread_mutex_unlock(&pl_inode->mutex); +out: + return ret; +} + +int +pl_metalock_is_active(pl_inode_t *pl_inode) +{ + if (list_empty(&pl_inode->metalk_list)) + return 0; + else + return 1; +} + +void +__pl_queue_lock(pl_inode_t *pl_inode, posix_lock_t *reqlock) +{ + list_add_tail(&reqlock->list, &pl_inode->queued_locks); } +int +pl_lk(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t cmd, + struct gf_flock *flock, dict_t *xdata) +{ + pl_inode_t *pl_inode = NULL; + int op_ret = 0; + int op_errno = 0; + int can_block = 0; + posix_lock_t *reqlock = NULL; + posix_lock_t *conf = NULL; + uint32_t lk_flags = 0; + posix_locks_private_t *priv = this->private; + pl_local_t *local = NULL; + short lock_type = 0; + + int ret = dict_get_uint32(xdata, GF_LOCK_MODE, &lk_flags); + if (ret == 0) { + if (priv->mandatory_mode == MLK_NONE) + gf_log(this->name, GF_LOG_DEBUG, + "Lock flags received " + "in a non-mandatory locking environment, " + "continuing"); + else + gf_log(this->name, GF_LOG_DEBUG, + "Lock flags received, " + "continuing"); + } + + if ((flock->l_start < 0) || ((flock->l_start + flock->l_len) < 0)) { + op_ret = -1; + op_errno = EINVAL; + goto unwind; + } + + /* As per 'man 3 fcntl', the value of l_len may be + * negative. In such cases, lock request should be + * considered for the range starting at 'l_start+l_len' + * and ending at 'l_start-1'. Update the fields accordingly. + */ + if (flock->l_len < 0) { + flock->l_start += flock->l_len; + flock->l_len = labs(flock->l_len); + } + + local = mem_get0(this->local_pool); + if (!local) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } else { + frame->local = local; + local->fd = fd_ref(fd); + } + + pl_inode = pl_inode_get(this, fd->inode, local); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + reqlock = new_posix_lock(flock, frame->root->client, frame->root->pid, + &frame->root->lk_owner, fd, lk_flags, can_block, + &op_errno); + + if (!reqlock) { + op_ret = -1; + goto unwind; + } + + pl_trace_in(this, frame, fd, NULL, cmd, flock, NULL); + + switch (cmd) { + case F_RESLK_LCKW: + can_block = 1; + + /* fall through */ + case F_RESLK_LCK: + reqlock->frame = frame; + reqlock->this = this; + + ret = pl_reserve_setlk(this, pl_inode, reqlock, can_block); + if (ret < 0) { + if (can_block) + goto out; + + op_ret = -1; + op_errno = -ret; + __destroy_lock(reqlock); + goto unwind; + } + /* Finally a getlk and return the call */ + conf = pl_getlk(pl_inode, reqlock); + if (conf) + posix_lock_to_flock(conf, flock); + break; + + case F_RESLK_UNLCK: + reqlock->frame = frame; + reqlock->this = this; + ret = pl_reserve_unlock(this, pl_inode, reqlock); + if (ret < 0) { + op_ret = -1; + op_errno = -ret; + } + __destroy_lock(reqlock); + goto unwind; + + break; + + case F_GETLK_FD: + reqlock->frame = frame; + reqlock->this = this; + ret = pl_verify_reservelk(this, pl_inode, reqlock, can_block); + GF_ASSERT(ret >= 0); + + ret = pl_getlk_fd(this, pl_inode, fd, reqlock); + if (ret < 0) { + gf_log(this->name, GF_LOG_DEBUG, "getting locks on fd failed"); + op_ret = -1; + op_errno = ENOLCK; + goto unwind; + } + + gf_log(this->name, GF_LOG_TRACE, + "Replying with a lock on fd for healing"); + + posix_lock_to_flock(reqlock, flock); + __destroy_lock(reqlock); + + break; + +#if F_GETLK != F_GETLK64 + case F_GETLK64: +#endif + case F_GETLK: + conf = pl_getlk(pl_inode, reqlock); + posix_lock_to_flock(conf, flock); + __destroy_lock(reqlock); + + break; + +#if F_SETLKW != F_SETLKW64 + case F_SETLKW64: +#endif + case F_SETLKW: + can_block = 1; + reqlock->frame = frame; + reqlock->this = this; + reqlock->blocking = can_block; + /* fall through */ + +#if F_SETLK != F_SETLK64 + case F_SETLK64: +#endif + case F_SETLK: + reqlock->frame = frame; + reqlock->this = this; + lock_type = flock->l_type; + + pthread_mutex_lock(&pl_inode->mutex); + { + if (pl_inode->migrated) { + op_errno = EREMOTE; + pthread_mutex_unlock(&pl_inode->mutex); + STACK_UNWIND_STRICT(lk, frame, -1, op_errno, flock, xdata); + + __destroy_lock(reqlock); + goto out; + } + } + pthread_mutex_unlock(&pl_inode->mutex); + + ret = pl_verify_reservelk(this, pl_inode, reqlock, can_block); + if (ret < 0) { + gf_log(this->name, GF_LOG_TRACE, + "Lock blocked due to conflicting reserve lock"); + goto out; + } + + if (reqlock->fl_type != F_UNLCK && pl_inode->mlock_enforced) { + ret = pl_lock_preempt(pl_inode, reqlock); + if (ret == -1) { + gf_log(this->name, GF_LOG_ERROR, "lock preempt failed"); + op_ret = -1; + op_errno = EAGAIN; + __destroy_lock(reqlock); + goto out; + } + + pl_trace_block(this, frame, fd, NULL, cmd, flock, NULL); + goto unwind; + } + + ret = pl_setlk(this, pl_inode, reqlock, can_block); + if (ret == -1) { + if ((can_block) && (F_UNLCK != lock_type)) { + goto out; + } + gf_log(this->name, GF_LOG_DEBUG, "returning EAGAIN"); + op_ret = -1; + op_errno = EAGAIN; + __destroy_lock(reqlock); + } else if (ret == -2) { + goto out; + } else if ((0 == ret) && (F_UNLCK == flock->l_type)) { + /* For NLM's last "unlock on fd" detection */ + if (pl_locks_by_fd(pl_inode, fd)) + flock->l_type = F_RDLCK; + else + flock->l_type = F_UNLCK; + } + } + +unwind: + pl_trace_out(this, frame, fd, NULL, cmd, flock, op_ret, op_errno, NULL); + pl_update_refkeeper(this, fd->inode); + + PL_STACK_UNWIND(lk, xdata, frame, op_ret, op_errno, flock, xdata); +out: + return 0; +} +/* TODO: this function just logs, no action required?? */ int -pl_readv_cont (call_frame_t *frame, xlator_t *this, - fd_t *fd, size_t size, off_t offset) +pl_forget(xlator_t *this, inode_t *inode) { - STACK_WIND (frame, pl_readv_cbk, - FIRST_CHILD (this), FIRST_CHILD (this)->fops->readv, - fd, size, offset); + pl_inode_t *pl_inode = NULL; + + posix_lock_t *ext_tmp = NULL; + posix_lock_t *ext_l = NULL; + struct list_head posixlks_released; + + pl_inode_lock_t *ino_tmp = NULL; + pl_inode_lock_t *ino_l = NULL; + struct list_head inodelks_released; + + pl_rw_req_t *rw_tmp = NULL; + pl_rw_req_t *rw_req = NULL; + + pl_entry_lock_t *entry_tmp = NULL; + pl_entry_lock_t *entry_l = NULL; + struct list_head entrylks_released; + + pl_dom_list_t *dom = NULL; + pl_dom_list_t *dom_tmp = NULL; + + INIT_LIST_HEAD(&posixlks_released); + INIT_LIST_HEAD(&inodelks_released); + INIT_LIST_HEAD(&entrylks_released); + + pl_inode = pl_inode_get(this, inode, NULL); + if (!pl_inode) + return 0; + + pthread_mutex_lock(&pl_inode->mutex); + { + if (!list_empty(&pl_inode->rw_list)) { + gf_log(this->name, GF_LOG_WARNING, + "Pending R/W requests found, releasing."); + + list_for_each_entry_safe(rw_req, rw_tmp, &pl_inode->rw_list, list) + { + list_del(&rw_req->list); + call_stub_destroy(rw_req->stub); + GF_FREE(rw_req); + } + } + + if (!list_empty(&pl_inode->ext_list)) { + gf_log(this->name, GF_LOG_WARNING, + "Pending fcntl locks found, releasing."); + + list_for_each_entry_safe(ext_l, ext_tmp, &pl_inode->ext_list, list) + { + __delete_lock(ext_l); + if (ext_l->blocked) { + list_add_tail(&ext_l->list, &posixlks_released); + continue; + } + __destroy_lock(ext_l); + } + } + + list_for_each_entry_safe(dom, dom_tmp, &pl_inode->dom_list, inode_list) + { + if (!list_empty(&dom->inodelk_list)) { + gf_log(this->name, GF_LOG_WARNING, + "Pending inode locks found, releasing."); + + list_for_each_entry_safe(ino_l, ino_tmp, &dom->inodelk_list, + list) + { + __delete_inode_lock(ino_l); + __pl_inodelk_unref(ino_l); + } + + list_splice_init(&dom->blocked_inodelks, &inodelks_released); + } + if (!list_empty(&dom->entrylk_list)) { + gf_log(this->name, GF_LOG_WARNING, + "Pending entry locks found, releasing."); + + list_for_each_entry_safe(entry_l, entry_tmp, &dom->entrylk_list, + domain_list) + { + list_del_init(&entry_l->domain_list); - return 0; + GF_FREE((char *)entry_l->basename); + GF_FREE(entry_l->connection_id); + GF_FREE(entry_l); + } + + list_splice_init(&dom->blocked_entrylks, &entrylks_released); + } + + list_del(&dom->inode_list); + gf_log("posix-locks", GF_LOG_TRACE, " Cleaning up domain: %s", + dom->domain); + GF_FREE((char *)(dom->domain)); + GF_FREE(dom); + } + } + pthread_mutex_unlock(&pl_inode->mutex); + + if (!list_empty(&posixlks_released)) { + list_for_each_entry_safe(ext_l, ext_tmp, &posixlks_released, list) + { + STACK_UNWIND_STRICT(lk, ext_l->frame, -1, 0, &ext_l->user_flock, + NULL); + __destroy_lock(ext_l); + } + } + + if (!list_empty(&inodelks_released)) { + list_for_each_entry_safe(ino_l, ino_tmp, &inodelks_released, + blocked_locks) + { + STACK_UNWIND_STRICT(inodelk, ino_l->frame, -1, 0, NULL); + __pl_inodelk_unref(ino_l); + } + } + + if (!list_empty(&entrylks_released)) { + list_for_each_entry_safe(entry_l, entry_tmp, &entrylks_released, + blocked_locks) + { + STACK_UNWIND_STRICT(entrylk, entry_l->frame, -1, 0, NULL); + GF_FREE((char *)entry_l->basename); + GF_FREE(entry_l->connection_id); + GF_FREE(entry_l); + } + } + + pthread_mutex_destroy(&pl_inode->mutex); + + GF_FREE(pl_inode); + + return 0; } +int +pl_release(xlator_t *this, fd_t *fd) +{ + pl_inode_t *pl_inode = NULL; + uint64_t tmp_pl_inode = 0; + int ret = -1; + uint64_t tmp = 0; + pl_fdctx_t *fdctx = NULL; + + if (fd == NULL) { + goto out; + } + + ret = inode_ctx_get(fd->inode, this, &tmp_pl_inode); + if (ret != 0) + goto clean; + + pl_inode = (pl_inode_t *)(long)tmp_pl_inode; + + pl_trace_release(this, fd); + + gf_log(this->name, GF_LOG_TRACE, "Releasing all locks with fd %p", fd); + + delete_locks_of_fd(this, pl_inode, fd); + pl_update_refkeeper(this, fd->inode); + +clean: + ret = fd_ctx_del(fd, this, &tmp); + if (ret) { + gf_log(this->name, GF_LOG_DEBUG, "Could not get fdctx"); + goto out; + } + + fdctx = (pl_fdctx_t *)(long)tmp; + + GF_FREE(fdctx); +out: + return ret; +} int -pl_readv (call_frame_t *frame, xlator_t *this, - fd_t *fd, size_t size, off_t offset) +pl_releasedir(xlator_t *this, fd_t *fd) { - posix_locks_private_t *priv = NULL; - pl_inode_t *pl_inode = NULL; - pl_rw_req_t *rw = NULL; - posix_lock_t region = {.list = {0, }, }; - int op_ret = 0; - int op_errno = 0; - char allowable = 0; + int ret = -1; + uint64_t tmp = 0; + pl_fdctx_t *fdctx = NULL; + if (fd == NULL) { + goto out; + } - priv = this->private; - pl_inode = pl_inode_get (this, fd->inode); + ret = fd_ctx_del(fd, this, &tmp); + if (ret) { + gf_log(this->name, GF_LOG_DEBUG, "Could not get fdctx"); + goto out; + } - if (priv->mandatory && pl_inode->mandatory) { - region.fl_start = offset; - region.fl_end = offset + size - 1; - region.transport = frame->root->trans; - region.client_pid = frame->root->pid; - - pthread_mutex_lock (&pl_inode->mutex); - { - allowable = __rw_allowable (pl_inode, ®ion, - GF_FOP_READ); - if (allowable) - goto unlock; + fdctx = (pl_fdctx_t *)(long)tmp; - if (fd->flags & O_NONBLOCK) { - gf_log (this->name, GF_LOG_DEBUG, - "returning EWOULDBLOCK"); - op_errno = EWOULDBLOCK; - op_ret = -1; - goto unlock; - } + GF_FREE(fdctx); +out: + return ret; +} - rw = CALLOC (1, sizeof (*rw)); - if (!rw) { - gf_log (this->name, GF_LOG_ERROR, - "out of memory :("); - op_errno = ENOMEM; - op_ret = -1; - goto unlock; - } +static int32_t +pl_request_link_count(dict_t **pxdata) +{ + dict_t *xdata; + + xdata = *pxdata; + if (xdata == NULL) { + xdata = dict_new(); + if (xdata == NULL) { + return ENOMEM; + } + } else { + dict_ref(xdata); + } + + if (dict_set_uint32(xdata, GET_LINK_COUNT, 0) != 0) { + dict_unref(xdata); + return ENOMEM; + } + + *pxdata = xdata; + + return 0; +} - rw->stub = fop_readv_stub (frame, pl_readv_cont, - fd, size, offset); - if (!rw->stub) { - gf_log (this->name, GF_LOG_ERROR, - "out of memory :("); - op_errno = ENOMEM; - op_ret = -1; - free (rw); - goto unlock; - } +static int32_t +pl_check_link_count(dict_t *xdata) +{ + int32_t count; - rw->region = region; + /* In case we are unable to read the link count from xdata, we take a + * conservative approach and return -2, which will prevent the inode from + * being considered deleted. In fact it will cause link tracking for this + * inode to be disabled completely to avoid races. */ - list_add_tail (&rw->list, &pl_inode->rw_list); - } - unlock: - pthread_mutex_unlock (&pl_inode->mutex); + if (xdata == NULL) { + return -2; + } - goto unwind; - } + if (dict_get_int32(xdata, GET_LINK_COUNT, &count) != 0) { + return -2; + } + return count; +} + +int32_t +pl_lookup_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, inode_t *inode, struct iatt *buf, dict_t *xdata, + struct iatt *postparent) +{ + pl_inode_t *pl_inode; + + if (op_ret >= 0) { + pl_inode = pl_inode_get(this, inode, NULL); + if (pl_inode == NULL) { + PL_STACK_UNWIND(lookup, xdata, frame, -1, ENOMEM, NULL, NULL, NULL, + NULL); + return 0; + } + + pthread_mutex_lock(&pl_inode->mutex); + + /* We only update the link count if we previously didn't know it. + * Doing it always can lead to races since lookup is not executed + * atomically most of the times. */ + if (pl_inode->links == -2) { + pl_inode->links = pl_check_link_count(xdata); + if (buf->ia_type == IA_IFDIR) { + /* Directories have at least 2 links. To avoid special handling + * for directories, we simply decrement the value here to make + * them equivalent to regular files. */ + pl_inode->links--; + } + } + + pthread_mutex_unlock(&pl_inode->mutex); + } + + PL_STACK_UNWIND(lookup, xdata, frame, op_ret, op_errno, inode, buf, xdata, + postparent); + return 0; +} - STACK_WIND (frame, pl_readv_cbk, - FIRST_CHILD (this), FIRST_CHILD (this)->fops->readv, - fd, size, offset); - return 0; +int32_t +pl_lookup(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata) +{ + int32_t error; + + error = pl_request_link_count(&xdata); + if (error == 0) { + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_lookup_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->lookup, loc, xdata); + dict_unref(xdata); + } else { + STACK_UNWIND_STRICT(lookup, frame, -1, error, NULL, NULL, NULL, NULL); + } + return 0; +} + +int32_t +pl_fstat_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, struct iatt *buf, dict_t *xdata) +{ + PL_STACK_UNWIND(fstat, xdata, frame, op_ret, op_errno, buf, xdata); + return 0; +} + +int32_t +pl_fstat(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_fstat_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fstat, fd, xdata); + return 0; +} + +int +pl_readdirp_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret, + int op_errno, gf_dirent_t *entries, dict_t *xdata) +{ + pl_local_t *local = NULL; + gf_dirent_t *entry = NULL; + + if (op_ret <= 0) + goto unwind; + + local = frame->local; + if (!local) + goto unwind; + + list_for_each_entry(entry, &entries->list, list) + { + pl_set_xdata_response(this, local, local->fd->inode, entry->inode, + entry->d_name, entry->dict, 0); + } unwind: - if (op_ret == -1) - STACK_UNWIND (frame, -1, op_errno, NULL, 0, NULL, NULL); + PL_STACK_UNWIND(readdirp, xdata, frame, op_ret, op_errno, entries, xdata); + + return 0; +} + +int +pl_readdirp(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, + off_t offset, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_readdirp_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readdirp, fd, size, offset, xdata); - return 0; + return 0; } +lock_migration_info_t * +gf_mig_info_for_lock(posix_lock_t *lock) +{ + lock_migration_info_t *new = GF_MALLOC(sizeof(lock_migration_info_t), + gf_common_mt_lock_mig); + if (new == NULL) { + goto out; + } + + INIT_LIST_HEAD(&new->list); + + posix_lock_to_flock(lock, &new->flock); + + new->lk_flags = lock->lk_flags; + + new->client_uid = gf_strdup(lock->client_uid); + +out: + return new; +} int -pl_writev_cont (call_frame_t *frame, xlator_t *this, fd_t *fd, - struct iovec *vector, int count, off_t offset, - struct iobref *iobref) +pl_fill_active_locks(pl_inode_t *pl_inode, lock_migration_info_t *lmi) { - STACK_WIND (frame, pl_writev_cbk, - FIRST_CHILD (this), FIRST_CHILD (this)->fops->writev, - fd, vector, count, offset, iobref); + posix_lock_t *temp = NULL; + lock_migration_info_t *newlock = NULL; + int count = 0; + + pthread_mutex_lock(&pl_inode->mutex); + { + if (list_empty(&pl_inode->ext_list)) { + count = 0; + goto unlock; + } + + list_for_each_entry(temp, &pl_inode->ext_list, list) + { + if (temp->blocked) + continue; + + newlock = gf_mig_info_for_lock(temp); + if (!newlock) { + pthread_mutex_unlock(&pl_inode->mutex); + gf_msg(THIS->name, GF_LOG_ERROR, 0, 0, "lock_dup failed"); + count = -1; + goto out; + } + + list_add_tail(&newlock->list, &lmi->list); + count++; + } + } + +unlock: + pthread_mutex_unlock(&pl_inode->mutex); +out: + return count; +} - return 0; +/* This function reads only active locks */ +static int +pl_getactivelk(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata) +{ + pl_inode_t *pl_inode = NULL; + lock_migration_info_t locks; + int op_ret = 0; + int op_errno = 0; + int count = 0; + + INIT_LIST_HEAD(&locks.list); + + pl_inode = pl_inode_get(this, loc->inode, NULL); + if (!pl_inode) { + gf_msg(this->name, GF_LOG_ERROR, 0, 0, "pl_inode_get failed"); + + op_ret = -1; + op_errno = ENOMEM; + goto out; + } + + count = pl_fill_active_locks(pl_inode, &locks); + + op_ret = count; + +out: + STACK_UNWIND_STRICT(getactivelk, frame, op_ret, op_errno, &locks, NULL); + + gf_free_mig_locks(&locks); + + return 0; } +void +pl_metalk_unref(pl_meta_lock_t *lock) +{ + lock->ref--; + if (!lock->ref) { + GF_FREE(lock->client_uid); + GF_FREE(lock); + } +} + +void +__pl_metalk_ref(pl_meta_lock_t *lock) +{ + lock->ref++; +} + +pl_meta_lock_t * +new_meta_lock(call_frame_t *frame, xlator_t *this) +{ + pl_meta_lock_t *lock = GF_CALLOC(1, sizeof(*lock), + gf_locks_mt_pl_meta_lock_t); + + if (!lock) { + gf_msg(this->name, GF_LOG_ERROR, 0, ENOMEM, + "mem allocation" + " failed for meta lock"); + goto out; + } + + INIT_LIST_HEAD(&lock->list); + INIT_LIST_HEAD(&lock->client_list); + + lock->client_uid = gf_strdup(frame->root->client->client_uid); + if (!lock->client_uid) { + gf_msg(this->name, GF_LOG_ERROR, 0, ENOMEM, + "mem allocation" + " failed for client_uid"); + GF_FREE(lock); + lock = NULL; + goto out; + } + + __pl_metalk_ref(lock); +out: + return lock; +} int -pl_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, - struct iovec *vector, int32_t count, off_t offset, - struct iobref *iobref) +pl_insert_metalk(pl_inode_t *pl_inode, pl_ctx_t *ctx, pl_meta_lock_t *lock) { - posix_locks_private_t *priv = NULL; - pl_inode_t *pl_inode = NULL; - pl_rw_req_t *rw = NULL; - posix_lock_t region = {.list = {0, }, }; - int op_ret = 0; - int op_errno = 0; - char allowable = 0; + int ret = 0; + + if (!pl_inode || !ctx || !lock) { + gf_msg(THIS->name, GF_LOG_INFO, 0, 0, "NULL parameter"); + ret = -1; + goto out; + } + + lock->pl_inode = pl_inode; + + /* refer function pl_inode_setlk for more info for this ref. + * This should be unrefed on meta-unlock triggered by rebalance or + * in cleanup with client disconnect*/ + /*TODO: unref this in cleanup code for disconnect and meta-unlock*/ + pl_inode->inode = inode_ref(pl_inode->inode); + + /* NOTE:In case of a client-server disconnect we need to cleanup metalk. + * Hence, adding the metalk to pl_ctx_t as well. The mutex lock order + * should always be on ctx and then on pl_inode*/ + + pthread_mutex_lock(&ctx->lock); + { + pthread_mutex_lock(&pl_inode->mutex); + { + list_add_tail(&lock->list, &pl_inode->metalk_list); + } + pthread_mutex_unlock(&pl_inode->mutex); + + list_add_tail(&lock->client_list, &ctx->metalk_list); + } + pthread_mutex_unlock(&ctx->lock); +out: + return ret; +} - priv = this->private; - pl_inode = pl_inode_get (this, fd->inode); +int32_t +pl_metalk(call_frame_t *frame, xlator_t *this, inode_t *inode) +{ + pl_inode_t *pl_inode = NULL; + int ret = 0; + pl_meta_lock_t *reqlk = NULL; + pl_ctx_t *ctx = NULL; + + pl_inode = pl_inode_get(this, inode, NULL); + if (!pl_inode) { + gf_msg(this->name, GF_LOG_ERROR, 0, ENOMEM, + "pl_inode mem allocation failedd"); + + ret = -1; + goto out; + } + + /* Non rebalance process trying to do metalock */ + if (frame->root->pid != GF_CLIENT_PID_DEFRAG) { + ret = -1; + goto out; + } + + /* Note: In the current scheme of glusterfs where lock migration is + * experimental, (ideally) the rebalance process which is migrating + * the file should request for a metalock. Hence, the metalock count + * should not be more than one for an inode. In future, if there is a + * need for meta-lock from other clients, the following block can be + * removed. + * + * Since pl_metalk is called as part of setxattr operation, any client + * process(non-rebalance) residing outside trusted network can exhaust + * memory of the server node by issuing setxattr repetitively on the + * metalock key. The following code makes sure that more than + * one metalock cannot be granted on an inode*/ + pthread_mutex_lock(&pl_inode->mutex); + { + if (pl_metalock_is_active(pl_inode)) { + ret = -1; + } + } + pthread_mutex_unlock(&pl_inode->mutex); + + if (ret == -1) { + gf_msg(this->name, GF_LOG_WARNING, EINVAL, 0, + "More than one meta-lock cannot be granted on" + " the inode"); + goto out; + } + + if (frame->root->client) { + ctx = pl_ctx_get(frame->root->client, this); + if (!ctx) { + gf_msg(this->name, GF_LOG_ERROR, 0, 0, "pl_ctx_get failed"); + + ret = -1; + goto out; + } + } else { + gf_msg(this->name, GF_LOG_INFO, 0, 0, + "frame-root-client " + "is NULL"); + + ret = -1; + goto out; + } + + reqlk = new_meta_lock(frame, this); + if (!reqlk) { + ret = -1; + goto out; + } + + ret = pl_insert_metalk(pl_inode, ctx, reqlk); + if (ret < 0) { + pl_metalk_unref(reqlk); + } - if (priv->mandatory && pl_inode->mandatory) { - region.fl_start = offset; - region.fl_end = offset + iov_length (vector, count) - 1; - region.transport = frame->root->trans; - region.client_pid = frame->root->pid; - - pthread_mutex_lock (&pl_inode->mutex); - { - allowable = __rw_allowable (pl_inode, ®ion, - GF_FOP_WRITE); - if (allowable) - goto unlock; +out: + return ret; +} + +static void +__unwind_queued_locks(pl_inode_t *pl_inode, struct list_head *tmp_list) +{ + if (list_empty(&pl_inode->queued_locks)) + return; + + list_splice_init(&pl_inode->queued_locks, tmp_list); +} + +static void +__unwind_blocked_locks(pl_inode_t *pl_inode, struct list_head *tmp_list) +{ + posix_lock_t *lock = NULL; + posix_lock_t *tmp = NULL; + + if (list_empty(&pl_inode->ext_list)) + return; + + list_for_each_entry_safe(lock, tmp, &pl_inode->ext_list, list) + { + if (!lock->blocking) + continue; + + list_del_init(&lock->list); + list_add_tail(&lock->list, tmp_list); + } +} + +int +pl_metaunlock(call_frame_t *frame, xlator_t *this, inode_t *inode, dict_t *dict) +{ + pl_inode_t *pl_inode = NULL; + int ret = 0; + pl_meta_lock_t *meta_lock = NULL; + pl_meta_lock_t *tmp_metalk = NULL; + pl_ctx_t *ctx = NULL; + posix_lock_t *posix_lock = NULL; + posix_lock_t *tmp_posixlk = NULL; + struct list_head tmp_posixlk_list; + + INIT_LIST_HEAD(&tmp_posixlk_list); + + if (frame->root->client) { + ctx = pl_ctx_get(frame->root->client, this); + if (!ctx) { + gf_msg(this->name, GF_LOG_ERROR, 0, 0, "pl_ctx_get failed"); + + ret = -1; + goto out; + } + } else { + gf_msg(this->name, GF_LOG_ERROR, 0, 0, + "frame-root-client is " + "NULL"); + ret = -1; + goto out; + } + + pl_inode = pl_inode_get(this, inode, NULL); + if (!pl_inode) { + ret = -1; + goto out; + } + + pthread_mutex_lock(&ctx->lock); + { + pthread_mutex_lock(&pl_inode->mutex); + { + /* Unwind queued locks regardless of migration status */ + __unwind_queued_locks(pl_inode, &tmp_posixlk_list); + + /* Unwind blocked locks only for successful migration */ + if (dict_get_sizen(dict, "status")) { + /* unwind all blocked locks */ + __unwind_blocked_locks(pl_inode, &tmp_posixlk_list); + } + + /* unlock metalk */ + /* if this list is empty then pl_inode->metalk_list + * should be empty too. meta lock should in all cases + * be added/removed from both pl_ctx_t and pl_inode */ + + if (list_empty(&ctx->metalk_list)) + goto unlock; + + list_for_each_entry_safe(meta_lock, tmp_metalk, &ctx->metalk_list, + client_list) + { + list_del_init(&meta_lock->client_list); + + pl_inode = meta_lock->pl_inode; + + list_del_init(&meta_lock->list); + + pl_metalk_unref(meta_lock); + + /* The corresponding ref is taken in + * pl_insert_metalk*/ + inode_unref(pl_inode->inode); + } + + if (dict_get_sizen(dict, "status")) + pl_inode->migrated = _gf_true; + else + pl_inode->migrated = _gf_false; + } + unlock: + + pthread_mutex_unlock(&pl_inode->mutex); + } + pthread_mutex_unlock(&ctx->lock); + +out: + list_for_each_entry_safe(posix_lock, tmp_posixlk, &tmp_posixlk_list, list) + { + list_del_init(&posix_lock->list); + + STACK_UNWIND_STRICT(lk, posix_lock->frame, -1, EREMOTE, + &posix_lock->user_flock, NULL); + + __destroy_lock(posix_lock); + } + + return ret; +} - if (fd->flags & O_NONBLOCK) { - gf_log (this->name, GF_LOG_DEBUG, - "returning EWOULDBLOCK"); - op_errno = EWOULDBLOCK; - op_ret = -1; - goto unlock; - } +int32_t +pl_setxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + pl_local_t *local = NULL; + pl_inode_t *pl_inode = NULL; + local = frame->local; + if (local && local->update_mlock_enforced_flag && op_ret != -1) { + pl_inode = pl_inode_get(this, local->inode, NULL); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + pthread_mutex_lock(&pl_inode->mutex); + { + while (pl_inode->fop_wind_count > 0) { + gf_msg(this->name, GF_LOG_INFO, 0, 0, + "waiting for existing fops (count %d) to drain for " + "gfid %s", + pl_inode->fop_wind_count, uuid_utoa(pl_inode->gfid)); + pthread_cond_wait(&pl_inode->check_fop_wind_count, + &pl_inode->mutex); + } + pl_inode->mlock_enforced = _gf_true; + pl_inode->check_mlock_info = _gf_false; + } + pthread_mutex_unlock(&pl_inode->mutex); + } + +unwind: + PL_STACK_UNWIND_FOR_CLIENT(setxattr, xdata, frame, op_ret, op_errno, xdata); + return 0; +} - rw = CALLOC (1, sizeof (*rw)); - if (!rw) { - gf_log (this->name, GF_LOG_ERROR, - "out of memory :("); - op_errno = ENOMEM; - op_ret = -1; - goto unlock; - } +int32_t +pl_setxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict, + int flags, dict_t *xdata) +{ + int op_ret = 0; + int op_errno = EINVAL; + dict_t *xdata_rsp = NULL; + char *name = NULL; + posix_locks_private_t *priv = this->private; - rw->stub = fop_writev_stub (frame, pl_writev_cont, - fd, vector, count, offset, - iobref); - if (!rw->stub) { - gf_log (this->name, GF_LOG_ERROR, - "out of memory :("); - op_errno = ENOMEM; - op_ret = -1; - free (rw); - goto unlock; - } + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); - rw->region = region; + if (dict_get_sizen(dict, GF_META_LOCK_KEY)) { + op_ret = pl_metalk(frame, this, loc->inode); - list_add_tail (&rw->list, &pl_inode->rw_list); - } - unlock: - pthread_mutex_unlock (&pl_inode->mutex); + } else if (dict_get_sizen(dict, GF_META_UNLOCK_KEY)) { + op_ret = pl_metaunlock(frame, this, loc->inode, dict); + } else { + goto usual; + } - goto unwind; - } + PL_STACK_UNWIND_FOR_CLIENT(setxattr, xdata_rsp, frame, op_ret, op_errno, + xdata_rsp); + return 0; +usual: + PL_CHECK_LOCK_ENFORCE_KEY(frame, dict, name, this, loc, ((fd_t *)NULL), + priv); - STACK_WIND (frame, pl_writev_cbk, - FIRST_CHILD (this), FIRST_CHILD (this)->fops->writev, - fd, vector, count, offset, iobref); - return 0; + STACK_WIND(frame, pl_setxattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->setxattr, loc, dict, flags, xdata); + return 0; unwind: - if (op_ret == -1) - STACK_UNWIND (frame, -1, op_errno, NULL, 0, NULL); + PL_STACK_UNWIND_FOR_CLIENT(setxattr, xdata, frame, op_ret, op_errno, xdata); + + return 0; +} - return 0; +void +pl_dump_lock(char *str, int size, struct gf_flock *flock, gf_lkowner_t *owner, + void *trans, char *conn_id, time_t *granted_time, + time_t *blkd_time, gf_boolean_t active) +{ + char *type_str = NULL; + char granted[GF_TIMESTR_SIZE] = { + 0, + }; + char blocked[GF_TIMESTR_SIZE] = { + 0, + }; + + if (granted_time) + gf_time_fmt(granted, sizeof(granted), *granted_time, gf_timefmt_FT); + if (blkd_time) + gf_time_fmt(blocked, sizeof(blocked), *blkd_time, gf_timefmt_FT); + switch (flock->l_type) { + case F_RDLCK: + type_str = "READ"; + break; + case F_WRLCK: + type_str = "WRITE"; + break; + case F_UNLCK: + type_str = "UNLOCK"; + break; + default: + type_str = "UNKNOWN"; + break; + } + + if (active) { + if (blkd_time && *blkd_time == 0) { + snprintf(str, size, RANGE_GRNTD_FMT, type_str, flock->l_whence, + (unsigned long long)flock->l_start, + (unsigned long long)flock->l_len, + (unsigned long long)flock->l_pid, lkowner_utoa(owner), + trans, conn_id, granted); + } else { + snprintf(str, size, RANGE_BLKD_GRNTD_FMT, type_str, flock->l_whence, + (unsigned long long)flock->l_start, + (unsigned long long)flock->l_len, + (unsigned long long)flock->l_pid, lkowner_utoa(owner), + trans, conn_id, blocked, granted); + } + } else { + snprintf(str, size, RANGE_BLKD_FMT, type_str, flock->l_whence, + (unsigned long long)flock->l_start, + (unsigned long long)flock->l_len, + (unsigned long long)flock->l_pid, lkowner_utoa(owner), trans, + conn_id, blocked); + } } +void +__dump_entrylks(pl_inode_t *pl_inode) +{ + pl_dom_list_t *dom = NULL; + pl_entry_lock_t *lock = NULL; + char blocked[GF_TIMESTR_SIZE] = { + 0, + }; + char granted[GF_TIMESTR_SIZE] = { + 0, + }; + int count = 0; + char key[GF_DUMP_MAX_BUF_LEN] = { + 0, + }; + char *k = "xlator.feature.locks.lock-dump.domain.entrylk"; + + char tmp[4098]; + + list_for_each_entry(dom, &pl_inode->dom_list, inode_list) + { + count = 0; + + gf_proc_dump_build_key(key, "lock-dump.domain", "domain"); + gf_proc_dump_write(key, "%s", dom->domain); + + list_for_each_entry(lock, &dom->entrylk_list, domain_list) + { + gf_time_fmt(granted, sizeof(granted), lock->granted_time, + gf_timefmt_FT); + gf_proc_dump_build_key(key, k, "entrylk[%d](ACTIVE)", count); + if (lock->blkd_time == 0) { + snprintf(tmp, sizeof(tmp), ENTRY_GRNTD_FMT, + lock->type == ENTRYLK_RDLCK ? "ENTRYLK_RDLCK" + : "ENTRYLK_WRLCK", + lock->basename, (unsigned long long)lock->client_pid, + lkowner_utoa(&lock->owner), lock->client, + lock->connection_id, granted); + } else { + gf_time_fmt(blocked, sizeof(blocked), lock->blkd_time, + gf_timefmt_FT); + snprintf(tmp, sizeof(tmp), ENTRY_BLKD_GRNTD_FMT, + lock->type == ENTRYLK_RDLCK ? "ENTRYLK_RDLCK" + : "ENTRYLK_WRLCK", + lock->basename, (unsigned long long)lock->client_pid, + lkowner_utoa(&lock->owner), lock->client, + lock->connection_id, blocked, granted); + } + + gf_proc_dump_write(key, "%s", tmp); + + count++; + } + + list_for_each_entry(lock, &dom->blocked_entrylks, blocked_locks) + { + gf_time_fmt(blocked, sizeof(blocked), lock->blkd_time, + gf_timefmt_FT); + + gf_proc_dump_build_key(key, k, "entrylk[%d](BLOCKED)", count); + snprintf( + tmp, sizeof(tmp), ENTRY_BLKD_FMT, + lock->type == ENTRYLK_RDLCK ? "ENTRYLK_RDLCK" : "ENTRYLK_WRLCK", + lock->basename, (unsigned long long)lock->client_pid, + lkowner_utoa(&lock->owner), lock->client, lock->connection_id, + blocked); + + gf_proc_dump_write(key, "%s", tmp); + + count++; + } + } +} + +void +dump_entrylks(pl_inode_t *pl_inode) +{ + pthread_mutex_lock(&pl_inode->mutex); + { + __dump_entrylks(pl_inode); + } + pthread_mutex_unlock(&pl_inode->mutex); +} + +void +__dump_inodelks(pl_inode_t *pl_inode) +{ + pl_dom_list_t *dom = NULL; + pl_inode_lock_t *lock = NULL; + int count = 0; + char key[GF_DUMP_MAX_BUF_LEN]; + + char tmp[4098]; + + list_for_each_entry(dom, &pl_inode->dom_list, inode_list) + { + count = 0; + + gf_proc_dump_build_key(key, "lock-dump.domain", "domain"); + gf_proc_dump_write(key, "%s", dom->domain); + + list_for_each_entry(lock, &dom->inodelk_list, list) + { + gf_proc_dump_build_key(key, "inodelk", "inodelk[%d](ACTIVE)", + count); + + SET_FLOCK_PID(&lock->user_flock, lock); + pl_dump_lock(tmp, sizeof(tmp), &lock->user_flock, &lock->owner, + lock->client, lock->connection_id, &lock->granted_time, + &lock->blkd_time, _gf_true); + gf_proc_dump_write(key, "%s", tmp); + + count++; + } + + list_for_each_entry(lock, &dom->blocked_inodelks, blocked_locks) + { + gf_proc_dump_build_key(key, "inodelk", "inodelk[%d](BLOCKED)", + count); + SET_FLOCK_PID(&lock->user_flock, lock); + pl_dump_lock(tmp, sizeof(tmp), &lock->user_flock, &lock->owner, + lock->client, lock->connection_id, 0, &lock->blkd_time, + _gf_false); + gf_proc_dump_write(key, "%s", tmp); + + count++; + } + } +} + +void +dump_inodelks(pl_inode_t *pl_inode) +{ + pthread_mutex_lock(&pl_inode->mutex); + { + __dump_inodelks(pl_inode); + } + pthread_mutex_unlock(&pl_inode->mutex); +} + +void +__dump_posixlks(pl_inode_t *pl_inode) +{ + posix_lock_t *lock = NULL; + int count = 0; + char key[GF_DUMP_MAX_BUF_LEN]; + + char tmp[4098]; + + list_for_each_entry(lock, &pl_inode->ext_list, list) + { + SET_FLOCK_PID(&lock->user_flock, lock); + gf_proc_dump_build_key(key, "posixlk", "posixlk[%d](%s)", count, + lock->blocked ? "BLOCKED" : "ACTIVE"); + pl_dump_lock(tmp, sizeof(tmp), &lock->user_flock, &lock->owner, + lock->client, lock->client_uid, &lock->granted_time, + &lock->blkd_time, (lock->blocked) ? _gf_false : _gf_true); + gf_proc_dump_write(key, "%s", tmp); + + count++; + } +} + +void +dump_posixlks(pl_inode_t *pl_inode) +{ + pthread_mutex_lock(&pl_inode->mutex); + { + __dump_posixlks(pl_inode); + } + pthread_mutex_unlock(&pl_inode->mutex); +} + +int32_t +pl_dump_inode_priv(xlator_t *this, inode_t *inode) +{ + int ret = -1; + uint64_t tmp_pl_inode = 0; + pl_inode_t *pl_inode = NULL; + char *pathname = NULL; + gf_boolean_t section_added = _gf_false; + + int count = 0; + + if (!inode) { + errno = EINVAL; + goto out; + } + + ret = TRY_LOCK(&inode->lock); + if (ret) + goto out; + { + ret = __inode_ctx_get(inode, this, &tmp_pl_inode); + if (ret) + goto unlock; + } +unlock: + UNLOCK(&inode->lock); + if (ret) + goto out; + + pl_inode = (pl_inode_t *)(long)tmp_pl_inode; + if (!pl_inode) { + ret = -1; + goto out; + } + + gf_proc_dump_add_section("xlator.features.locks.%s.inode", this->name); + section_added = _gf_true; + + /*We are safe to call __inode_path since we have the + * inode->table->lock */ + __inode_path(inode, NULL, &pathname); + if (pathname) + gf_proc_dump_write("path", "%s", pathname); + + gf_proc_dump_write("mandatory", "%d", pl_inode->mandatory); + + ret = pthread_mutex_trylock(&pl_inode->mutex); + if (ret) + goto out; + { + count = __get_entrylk_count(this, pl_inode); + if (count) { + gf_proc_dump_write("entrylk-count", "%d", count); + __dump_entrylks(pl_inode); + } + + count = __get_inodelk_count(this, pl_inode, NULL); + if (count) { + gf_proc_dump_write("inodelk-count", "%d", count); + __dump_inodelks(pl_inode); + } + + count = __get_posixlk_count(pl_inode); + if (count) { + gf_proc_dump_write("posixlk-count", "%d", count); + __dump_posixlks(pl_inode); + } + + gf_proc_dump_write("links", "%d", pl_inode->links); + gf_proc_dump_write("removes_pending", "%u", pl_inode->remove_running); + gf_proc_dump_write("removed", "%u", pl_inode->removed); + } + pthread_mutex_unlock(&pl_inode->mutex); + +out: + GF_FREE(pathname); + + if (ret && inode) { + if (!section_added) + gf_proc_dump_add_section( + "xlator.features.locks.%s." + "inode", + this->name); + gf_proc_dump_write("Unable to print lock state", + "(Lock " + "acquisition failure) %s", + uuid_utoa(inode->gfid)); + } + return ret; +} + +int32_t +mem_acct_init(xlator_t *this) +{ + int ret = -1; + + if (!this) + return ret; + + ret = xlator_mem_acct_init(this, gf_locks_mt_end + 1); + + if (ret != 0) { + gf_log(this->name, GF_LOG_ERROR, + "Memory accounting init" + "failed"); + return ret; + } + + return ret; +} + +pl_ctx_t * +pl_ctx_get(client_t *client, xlator_t *xlator) +{ + void *tmp = NULL; + pl_ctx_t *ctx = NULL; + pl_ctx_t *setted_ctx = NULL; + + client_ctx_get(client, xlator, &tmp); + + ctx = tmp; + + if (ctx != NULL) + goto out; + + ctx = GF_CALLOC(1, sizeof(pl_ctx_t), gf_locks_mt_posix_lock_t); + + if (ctx == NULL) + goto out; + + pthread_mutex_init(&ctx->lock, NULL); + INIT_LIST_HEAD(&ctx->inodelk_lockers); + INIT_LIST_HEAD(&ctx->entrylk_lockers); + INIT_LIST_HEAD(&ctx->metalk_list); + + setted_ctx = client_ctx_set(client, xlator, ctx); + if (ctx != setted_ctx) { + pthread_mutex_destroy(&ctx->lock); + GF_FREE(ctx); + ctx = setted_ctx; + } +out: + return ctx; +} int -pl_lk (call_frame_t *frame, xlator_t *this, - fd_t *fd, int32_t cmd, struct flock *flock) +pl_metalk_client_cleanup(xlator_t *this, pl_ctx_t *ctx) { - transport_t *transport = NULL; - pid_t client_pid = 0; - posix_locks_private_t *priv = NULL; - pl_inode_t *pl_inode = NULL; - int op_ret = 0; - int op_errno = 0; - int can_block = 0; - posix_lock_t *reqlock = NULL; - posix_lock_t *conf = NULL; - int ret = 0; + pl_meta_lock_t *meta_lock = NULL; + pl_meta_lock_t *tmp_metalk = NULL; + pl_inode_t *pl_inode = NULL; + posix_lock_t *posix_lock = NULL; + posix_lock_t *tmp_posixlk = NULL; + struct list_head tmp_posixlk_list; + + INIT_LIST_HEAD(&tmp_posixlk_list); + + pthread_mutex_lock(&ctx->lock); + { + /* if this list is empty then pl_inode->metalk_list should be + * empty too. meta lock should in all cases be added/removed + * from both pl_ctx_t and pl_inode */ + if (list_empty(&ctx->metalk_list)) + goto unlock; + + list_for_each_entry_safe(meta_lock, tmp_metalk, &ctx->metalk_list, + client_list) + { + list_del_init(&meta_lock->client_list); + + pl_inode = meta_lock->pl_inode; + + pthread_mutex_lock(&pl_inode->mutex); + + { + /* Since the migration status is unknown here + * unwind all queued and blocked locks to check + * migration status and find the correct + * destination */ + __unwind_queued_locks(pl_inode, &tmp_posixlk_list); + + __unwind_blocked_locks(pl_inode, &tmp_posixlk_list); + + list_del_init(&meta_lock->list); + + pl_metalk_unref(meta_lock); + } + pthread_mutex_unlock(&pl_inode->mutex); + + /* The corresponding ref is taken in + * pl_insert_metalk*/ + inode_unref(pl_inode->inode); + } + } + +unlock: + pthread_mutex_unlock(&ctx->lock); + + list_for_each_entry_safe(posix_lock, tmp_posixlk, &tmp_posixlk_list, list) + { + list_del_init(&posix_lock->list); + + STACK_UNWIND_STRICT(lk, posix_lock->frame, -1, EREMOTE, + &posix_lock->user_flock, NULL); + + __destroy_lock(posix_lock); + } + return 0; +} - transport = frame->root->trans; - client_pid = frame->root->pid; - priv = this->private; +static int +pl_client_disconnect_cbk(xlator_t *this, client_t *client) +{ + pl_ctx_t *pl_ctx = pl_ctx_get(client, this); + if (pl_ctx) { + pl_inodelk_client_cleanup(this, pl_ctx); + pl_entrylk_client_cleanup(this, pl_ctx); + pl_metalk_client_cleanup(this, pl_ctx); + } + + return 0; +} - pl_inode = pl_inode_get (this, fd->inode); - if (!pl_inode) { - gf_log (this->name, GF_LOG_ERROR, - "out of memory :("); - op_ret = -1; - op_errno = ENOMEM; - goto unwind; - } +static int +pl_client_destroy_cbk(xlator_t *this, client_t *client) +{ + void *tmp = NULL; + pl_ctx_t *pl_ctx = NULL; - reqlock = new_posix_lock (flock, transport, client_pid); - if (!reqlock) { - gf_log (this->name, GF_LOG_ERROR, - "out of memory :("); - op_ret = -1; - op_errno = ENOMEM; - goto unwind; - } + pl_client_disconnect_cbk(this, client); - switch (cmd) { + client_ctx_del(client, this, &tmp); -#if F_GETLK != F_GETLK64 - case F_GETLK64: -#endif - case F_GETLK: - conf = pl_getlk (pl_inode, reqlock, GF_LOCK_POSIX); - posix_lock_to_flock (conf, flock); - __destroy_lock (reqlock); + if (tmp == NULL) + return 0; - break; + pl_ctx = tmp; -#if F_SETLKW != F_SETLKW64 - case F_SETLKW64: -#endif - case F_SETLKW: - can_block = 1; - reqlock->frame = frame; - reqlock->this = this; - reqlock->fd = fd; + GF_ASSERT(list_empty(&pl_ctx->inodelk_lockers)); + GF_ASSERT(list_empty(&pl_ctx->entrylk_lockers)); - /* fall through */ + pthread_mutex_destroy(&pl_ctx->lock); + GF_FREE(pl_ctx); -#if F_SETLK != F_SETLK64 - case F_SETLK64: -#endif - case F_SETLK: - memcpy (&reqlock->user_flock, flock, sizeof (struct flock)); - ret = pl_setlk (this, pl_inode, reqlock, - can_block, GF_LOCK_POSIX); - - if (ret == -1) { - if (can_block) - goto out; - - gf_log (this->name, GF_LOG_DEBUG, "returning EAGAIN"); - op_ret = -1; - op_errno = EAGAIN; - __destroy_lock (reqlock); - } - } + return 0; +} + +int +reconfigure(xlator_t *this, dict_t *options) +{ + posix_locks_private_t *priv = this->private; + int ret = -1; + char *tmp_str = NULL; + + GF_OPTION_RECONF("trace", priv->trace, options, bool, out); + + GF_OPTION_RECONF("monkey-unlocking", priv->monkey_unlocking, options, bool, + out); + + GF_OPTION_RECONF("revocation-secs", priv->revocation_secs, options, uint32, + out); + + GF_OPTION_RECONF("revocation-clear-all", priv->revocation_clear_all, + options, bool, out); + + GF_OPTION_RECONF("revocation-max-blocked", priv->revocation_max_blocked, + options, uint32, out); + + GF_OPTION_RECONF("notify-contention", priv->notify_contention, options, + bool, out); + + GF_OPTION_RECONF("notify-contention-delay", priv->notify_contention_delay, + options, uint32, out); + + GF_OPTION_RECONF("mandatory-locking", tmp_str, options, str, out); + + GF_OPTION_RECONF("enforce-mandatory-lock", priv->mlock_enforced, options, + bool, out); + + if (!strcmp(tmp_str, "forced")) + priv->mandatory_mode = MLK_FORCED; + else if (!strcmp(tmp_str, "file")) + priv->mandatory_mode = MLK_FILE_BASED; + else if (!strcmp(tmp_str, "optimal")) + priv->mandatory_mode = MLK_OPTIMAL; + else + priv->mandatory_mode = MLK_NONE; + + ret = 0; -unwind: - STACK_UNWIND (frame, op_ret, op_errno, flock); out: - return 0; + return ret; } +int +init(xlator_t *this) +{ + posix_locks_private_t *priv = NULL; + xlator_list_t *trav = NULL; + char *tmp_str = NULL; + int ret = -1; + + if (!this->children || this->children->next) { + gf_log(this->name, GF_LOG_CRITICAL, + "FATAL: posix-locks should have exactly one child"); + goto out; + } + + if (!this->parents) { + gf_log(this->name, GF_LOG_WARNING, + "Volume is dangling. Please check the volume file."); + } + + trav = this->children; + while (trav->xlator->children) + trav = trav->xlator->children; + + if (strncmp("storage/", trav->xlator->type, 8)) { + gf_log(this->name, GF_LOG_CRITICAL, + "'locks' translator is not loaded over a storage " + "translator"); + goto out; + } + + priv = GF_CALLOC(1, sizeof(*priv), gf_locks_mt_posix_locks_private_t); + + GF_OPTION_INIT("mandatory-locking", tmp_str, str, out); + if (!strcmp(tmp_str, "forced")) + priv->mandatory_mode = MLK_FORCED; + else if (!strcmp(tmp_str, "file")) + priv->mandatory_mode = MLK_FILE_BASED; + else if (!strcmp(tmp_str, "optimal")) + priv->mandatory_mode = MLK_OPTIMAL; + else + priv->mandatory_mode = MLK_NONE; + + tmp_str = NULL; + + GF_OPTION_INIT("trace", priv->trace, bool, out); + + GF_OPTION_INIT("monkey-unlocking", priv->monkey_unlocking, bool, out); + + GF_OPTION_INIT("revocation-secs", priv->revocation_secs, uint32, out); + + GF_OPTION_INIT("revocation-clear-all", priv->revocation_clear_all, bool, + out); + + GF_OPTION_INIT("revocation-max-blocked", priv->revocation_max_blocked, + uint32, out); + + GF_OPTION_INIT("notify-contention", priv->notify_contention, bool, out); + + GF_OPTION_INIT("notify-contention-delay", priv->notify_contention_delay, + uint32, out); + + GF_OPTION_INIT("enforce-mandatory-lock", priv->mlock_enforced, bool, out); + + this->local_pool = mem_pool_new(pl_local_t, 32); + if (!this->local_pool) { + ret = -1; + gf_log(this->name, GF_LOG_ERROR, + "failed to create local_t's memory pool"); + goto out; + } + + this->private = priv; + ret = 0; + +out: + if (ret) { + GF_FREE(priv); + } + return ret; +} + +void +fini(xlator_t *this) +{ + posix_locks_private_t *priv = this->private; + if (!priv) + return; + this->private = NULL; + if (this->local_pool) { + mem_pool_destroy(this->local_pool); + this->local_pool = NULL; + } + GF_FREE(priv->brickname); + GF_FREE(priv); + + return; +} -/* TODO: this function just logs, no action required?? */ int -pl_forget (xlator_t *this, - inode_t *inode) +pl_inodelk(call_frame_t *frame, xlator_t *this, const char *volume, loc_t *loc, + int32_t cmd, struct gf_flock *flock, dict_t *xdata); + +int +pl_finodelk(call_frame_t *frame, xlator_t *this, const char *volume, fd_t *fd, + int32_t cmd, struct gf_flock *flock, dict_t *xdata); + +int +pl_entrylk(call_frame_t *frame, xlator_t *this, const char *volume, loc_t *loc, + const char *basename, entrylk_cmd cmd, entrylk_type type, + dict_t *xdata); + +int +pl_fentrylk(call_frame_t *frame, xlator_t *this, const char *volume, fd_t *fd, + const char *basename, entrylk_cmd cmd, entrylk_type type, + dict_t *xdata); + +int32_t +pl_rename_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, struct iatt *buf, struct iatt *preoldparent, + struct iatt *postoldparent, struct iatt *prenewparent, + struct iatt *postnewparent, dict_t *xdata) { - pl_inode_t *pl_inode = NULL; - - posix_lock_t *ext_tmp = NULL; - posix_lock_t *ext_l = NULL; + pl_inode_remove_cbk(this, cookie, op_ret < 0 ? op_errno : 0); + + PL_STACK_UNWIND(rename, xdata, frame, op_ret, op_errno, buf, preoldparent, + postoldparent, prenewparent, postnewparent, xdata); - posix_lock_t *int_tmp = NULL; - posix_lock_t *int_l = NULL; + return 0; +} - pl_rw_req_t *rw_tmp = NULL; - pl_rw_req_t *rw_req = NULL; +int32_t +pl_rename(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc, + dict_t *xdata) +{ + int32_t error; - pl_entry_lock_t *entry_tmp = NULL; - pl_entry_lock_t *entry_l = NULL; + error = PL_INODE_REMOVE(rename, frame, this, oldloc, newloc, pl_rename, + pl_rename_cbk, oldloc, newloc, xdata); + if (error > 0) { + STACK_UNWIND_STRICT(rename, frame, -1, error, NULL, NULL, NULL, NULL, + NULL, NULL); + } - pl_inode = pl_inode_get (this, inode); + return 0; +} - if (!list_empty (&pl_inode->rw_list)) { - gf_log (this->name, GF_LOG_CRITICAL, - "pending R/W requests found, releasing."); - - list_for_each_entry_safe (rw_req, rw_tmp, &pl_inode->rw_list, - list) { - - list_del (&rw_req->list); - FREE (rw_req); - } - } +posix_lock_t * +gf_lkmig_info_to_posix_lock(call_frame_t *frame, lock_migration_info_t *lmi) +{ + posix_lock_t *lock = GF_CALLOC(1, sizeof(posix_lock_t), + gf_locks_mt_posix_lock_t); + if (!lock) + goto out; - if (!list_empty (&pl_inode->ext_list)) { - gf_log (this->name, GF_LOG_CRITICAL, - "Pending fcntl locks found, releasing."); + lock->fl_start = lmi->flock.l_start; + lock->fl_type = lmi->flock.l_type; - list_for_each_entry_safe (ext_l, ext_tmp, &pl_inode->ext_list, - list) { - - __delete_lock (pl_inode, ext_l); - __destroy_lock (ext_l); - } - } + if (lmi->flock.l_len == 0) + lock->fl_end = LLONG_MAX; + else + lock->fl_end = lmi->flock.l_start + lmi->flock.l_len - 1; - if (!list_empty (&pl_inode->int_list)) { - gf_log (this->name, GF_LOG_CRITICAL, - "Pending inode locks found, releasing."); + lock->client = frame->root->client; - list_for_each_entry_safe (int_l, int_tmp, &pl_inode->int_list, - list) { - - __delete_lock (pl_inode, int_l); - __destroy_lock (int_l); - } - } - - if (!list_empty (&pl_inode->dir_list)) { - gf_log (this->name, GF_LOG_CRITICAL, - "Pending entry locks found, releasing."); - - list_for_each_entry_safe (entry_l, entry_tmp, - &pl_inode->dir_list, inode_list) { - - list_del (&entry_l->inode_list); - FREE (entry_l); - } - } + lock->lk_flags = lmi->lk_flags; + + lock->client_uid = gf_strdup(lmi->client_uid); + if (lock->client_uid == NULL) { + GF_FREE(lock); + lock = NULL; + goto out; + } + + lock->client_pid = lmi->flock.l_pid; + lock->owner = lmi->flock.l_owner; + + INIT_LIST_HEAD(&lock->list); + +out: + return lock; +} + +/* This function is supposed to write the active locks from the source brick(in + * rebalance context) and write here. Hence, will add the locks directly to the + * pl_inode->ext_list*/ +int +pl_write_active_locks(call_frame_t *frame, pl_inode_t *pl_inode, + lock_migration_info_t *locklist) +{ + posix_lock_t *newlock = NULL; + lock_migration_info_t *temp = NULL; + int ret = 0; + + pthread_mutex_lock(&pl_inode->mutex); + { + /* Just making sure the activelk list is empty. Should not + * happen though*/ + if (!list_empty(&pl_inode->ext_list)) { + pthread_mutex_unlock(&pl_inode->mutex); + gf_msg(THIS->name, GF_LOG_ERROR, 0, 0, "invalid locks found"); + + ret = -1; + goto out; + } + + /* This list also should not be empty */ + if (list_empty(&locklist->list)) { + pthread_mutex_unlock(&pl_inode->mutex); + gf_msg(THIS->name, GF_LOG_ERROR, 0, 0, "empty lock list"); + + ret = -1; + goto out; + } + + list_for_each_entry(temp, &locklist->list, list) + { + newlock = gf_lkmig_info_to_posix_lock(frame, temp); + if (!newlock) { + pthread_mutex_unlock(&pl_inode->mutex); + gf_msg(THIS->name, GF_LOG_ERROR, 0, 0, + "mem allocation failed for newlock"); + + ret = -1; + goto out; + } + list_add_tail(&newlock->list, &pl_inode->ext_list); + } + } + /*TODO: What if few lock add failed with ENOMEM. Should the already + * added locks be clearted */ + pthread_mutex_unlock(&pl_inode->mutex); +out: + return ret; +} + +static int +pl_setactivelk(call_frame_t *frame, xlator_t *this, loc_t *loc, + lock_migration_info_t *locklist, dict_t *xdata) +{ + int op_ret = 0; + int op_errno = 0; + int ret = 0; + + pl_inode_t *pl_inode = pl_inode_get(this, loc->inode, NULL); + if (!pl_inode) { + gf_msg(this->name, GF_LOG_ERROR, 0, 0, "pl_inode_get failed"); + + op_ret = -1; + op_errno = ENOMEM; + goto out; + } + ret = pl_write_active_locks(frame, pl_inode, locklist); + + op_ret = ret; + +out: + STACK_UNWIND_STRICT(setactivelk, frame, op_ret, op_errno, NULL); - FREE (pl_inode); + return 0; +} + +int32_t +pl_unlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, struct iatt *preparent, struct iatt *postparent, + dict_t *xdata) +{ + pl_inode_remove_cbk(this, cookie, op_ret < 0 ? op_errno : 0); - return 0; + PL_STACK_UNWIND(unlink, xdata, frame, op_ret, op_errno, preparent, + postparent, xdata); + + return 0; } +int32_t +pl_unlink(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag, + dict_t *xdata) +{ + int32_t error; + + error = PL_INODE_REMOVE(unlink, frame, this, loc, NULL, pl_unlink, + pl_unlink_cbk, loc, xflag, xdata); + if (error > 0) { + STACK_UNWIND_STRICT(unlink, frame, -1, error, NULL, NULL, NULL); + } + + return 0; +} + +int32_t +pl_mkdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, inode_t *inode, struct iatt *buf, + struct iatt *preparent, struct iatt *postparent, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(mkdir, xdata, frame, op_ret, op_errno, inode, + buf, preparent, postparent, xdata); + return 0; +} + +int +pl_mkdir(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, + mode_t umask, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_mkdir_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->mkdir, loc, mode, umask, xdata); + return 0; +} + +int32_t +pl_stat_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, struct iatt *buf, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(stat, xdata, frame, op_ret, op_errno, buf, + xdata); + return 0; +} int -init (xlator_t *this) +pl_stat(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_stat_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->stat, loc, xdata); + return 0; +} + +int32_t +pl_mknod_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, inode_t *inode, struct iatt *buf, + struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { - posix_locks_private_t *priv = NULL; - xlator_list_t *trav = NULL; - data_t *mandatory = NULL; + PL_STACK_UNWIND_FOR_CLIENT(mknod, xdata, frame, op_ret, op_errno, inode, + buf, preparent, postparent, xdata); + return 0; +} - if (!this->children || this->children->next) { - gf_log (this->name, GF_LOG_ERROR, - "FATAL: posix-locks should have exactly one child"); - return -1; - } +int +pl_mknod(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, + dev_t rdev, mode_t umask, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_mknod_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, umask, xdata); + return 0; +} - if (!this->parents) { - gf_log (this->name, GF_LOG_WARNING, - "dangling volume. check volfile "); - } +int32_t +pl_rmdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, struct iatt *preparent, struct iatt *postparent, + dict_t *xdata) +{ + pl_inode_remove_cbk(this, cookie, op_ret < 0 ? op_errno : 0); - trav = this->children; - while (trav->xlator->children) - trav = trav->xlator->children; + PL_STACK_UNWIND_FOR_CLIENT(rmdir, xdata, frame, op_ret, op_errno, preparent, + postparent, xdata); - if (strncmp ("storage/", trav->xlator->type, 8)) { - gf_log (this->name, GF_LOG_ERROR, - "'posix-locks' not loaded over storage translator"); - return -1; - } + return 0; +} - priv = CALLOC (1, sizeof (*priv)); +int +pl_rmdir(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflags, + dict_t *xdata) +{ + int32_t error; - mandatory = dict_get (this->options, "mandatory-locks"); - if (mandatory) { - if (gf_string2boolean (mandatory->data, - &priv->mandatory) == -1) { - gf_log (this->name, GF_LOG_ERROR, - "'mandatory-locks' takes only boolean " - "options"); - return -1; - } - } + error = PL_INODE_REMOVE(rmdir, frame, this, loc, NULL, pl_rmdir, + pl_rmdir_cbk, loc, xflags, xdata); + if (error > 0) { + STACK_UNWIND_STRICT(rmdir, frame, -1, error, NULL, NULL, NULL); + } - this->private = priv; - return 0; + return 0; } +int32_t +pl_symlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, inode_t *inode, + struct iatt *buf, struct iatt *preparent, + struct iatt *postparent, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(symlink, xdata, frame, op_ret, op_errno, inode, + buf, preparent, postparent, xdata); + return 0; +} int -fini (xlator_t *this) +pl_symlink(call_frame_t *frame, xlator_t *this, const char *linkname, + loc_t *loc, mode_t umask, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_symlink_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->symlink, linkname, loc, umask, xdata); + return 0; +} + +int32_t +pl_link_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, inode_t *inode, struct iatt *buf, + struct iatt *preparent, struct iatt *postparent, dict_t *xdata) { - posix_locks_private_t *priv = NULL; + pl_inode_t *pl_inode = (pl_inode_t *)cookie; + + if (op_ret >= 0) { + pthread_mutex_lock(&pl_inode->mutex); - priv = this->private; - free (priv); + /* TODO: can happen pl_inode->links == 0 ? */ + if (pl_inode->links >= 0) { + pl_inode->links++; + } - return 0; + pthread_mutex_unlock(&pl_inode->mutex); + } + + PL_STACK_UNWIND_FOR_CLIENT(link, xdata, frame, op_ret, op_errno, inode, buf, + preparent, postparent, xdata); + return 0; +} + +int +pl_link(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc, + dict_t *xdata) +{ + pl_inode_t *pl_inode; + + pl_inode = pl_inode_get(this, oldloc->inode, NULL); + if (pl_inode == NULL) { + STACK_UNWIND_STRICT(link, frame, -1, ENOMEM, NULL, NULL, NULL, NULL, + NULL); + return 0; + } + + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), oldloc, newloc); + STACK_WIND_COOKIE(frame, pl_link_cbk, pl_inode, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->link, oldloc, newloc, xdata); + return 0; } +int32_t +pl_fsync_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, struct iatt *prebuf, struct iatt *postbuf, + dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(fsync, xdata, frame, op_ret, op_errno, prebuf, + postbuf, xdata); + return 0; +} int -pl_inodelk (call_frame_t *frame, xlator_t *this, - const char *volume, loc_t *loc, int32_t cmd, struct flock *flock); +pl_fsync(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t datasync, + dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_fsync_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fsync, fd, datasync, xdata); + return 0; +} + +int32_t +pl_readdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, gf_dirent_t *entries, + dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(readdir, xdata, frame, op_ret, op_errno, entries, + xdata); + return 0; +} int -pl_finodelk (call_frame_t *frame, xlator_t *this, - const char *volume, fd_t *fd, int32_t cmd, struct flock *flock); +pl_readdir(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size, + off_t offset, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_readdir_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readdir, fd, size, offset, xdata); + return 0; +} + +int32_t +pl_fsyncdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(fsyncdir, xdata, frame, op_ret, op_errno, xdata); + return 0; +} int -pl_entrylk (call_frame_t *frame, xlator_t *this, - const char *volume, loc_t *loc, const char *basename, - entrylk_cmd cmd, entrylk_type type); +pl_fsyncdir(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t datasync, + dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_fsyncdir_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fsyncdir, fd, datasync, xdata); + return 0; +} + +int32_t +pl_statfs_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, struct statvfs *buf, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(statfs, xdata, frame, op_ret, op_errno, buf, + xdata); + return 0; +} int -pl_fentrylk (call_frame_t *frame, xlator_t *this, - const char *volume, fd_t *fd, const char *basename, - entrylk_cmd cmd, entrylk_type type); +pl_statfs(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_statfs_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->statfs, loc, xdata); + return 0; +} -struct xlator_fops fops = { - .create = pl_create, - .truncate = pl_truncate, - .ftruncate = pl_ftruncate, - .open = pl_open, - .readv = pl_readv, - .writev = pl_writev, - .lk = pl_lk, - .inodelk = pl_inodelk, - .finodelk = pl_finodelk, - .entrylk = pl_entrylk, - .fentrylk = pl_fentrylk, - .flush = pl_flush, -}; +int32_t +pl_removexattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + pl_local_t *local = NULL; + pl_inode_t *pl_inode = NULL; + + local = frame->local; + if (local && local->update_mlock_enforced_flag && op_ret != -1) { + pl_inode = pl_inode_get(this, local->inode, NULL); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + pthread_mutex_lock(&pl_inode->mutex); + { + pl_inode->mlock_enforced = _gf_false; + pl_inode->check_mlock_info = _gf_false; + pl_inode->track_fop_wind_count = _gf_true; + } + pthread_mutex_unlock(&pl_inode->mutex); + } + +unwind: + PL_STACK_UNWIND_FOR_CLIENT(removexattr, xdata, frame, op_ret, op_errno, + xdata); + return 0; +} + +int +pl_removexattr(call_frame_t *frame, xlator_t *this, loc_t *loc, + const char *name, dict_t *xdata) +{ + int op_ret = 0; + int op_errno = EINVAL; + posix_locks_private_t *priv = this->private; + + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + + PL_CHECK_LOCK_ENFORCE_KEY(frame, ((dict_t *)NULL), name, this, loc, + ((fd_t *)NULL), priv); + + STACK_WIND(frame, pl_removexattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->removexattr, loc, name, xdata); + return 0; + +unwind: + PL_STACK_UNWIND_FOR_CLIENT(removexattr, xdata, frame, op_ret, op_errno, + NULL); + + return 0; +} + +int32_t +pl_fremovexattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *xdata) +{ + pl_local_t *local = NULL; + pl_inode_t *pl_inode = NULL; + + local = frame->local; + if (local && local->update_mlock_enforced_flag && op_ret != -1) { + pl_inode = pl_inode_get(this, local->inode, NULL); + if (!pl_inode) { + op_ret = -1; + op_errno = ENOMEM; + goto unwind; + } + + pthread_mutex_lock(&pl_inode->mutex); + { + pl_inode->mlock_enforced = _gf_false; + pl_inode->check_mlock_info = _gf_false; + } + pthread_mutex_unlock(&pl_inode->mutex); + } + +unwind: + PL_STACK_UNWIND_FOR_CLIENT(fremovexattr, xdata, frame, op_ret, op_errno, + xdata); + return 0; +} + +int +pl_fremovexattr(call_frame_t *frame, xlator_t *this, fd_t *fd, const char *name, + dict_t *xdata) +{ + int op_ret = -1; + int op_errno = EINVAL; + posix_locks_private_t *priv = this->private; + + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + + PL_CHECK_LOCK_ENFORCE_KEY(frame, ((dict_t *)NULL), name, this, + ((loc_t *)NULL), fd, priv); + + STACK_WIND(frame, pl_fremovexattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fremovexattr, fd, name, xdata); + return 0; + +unwind: + PL_STACK_UNWIND_FOR_CLIENT(fremovexattr, xdata, frame, op_ret, op_errno, + NULL); + return 0; +} + +int32_t +pl_rchecksum_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, uint32_t weak_cksum, + uint8_t *strong_cksum, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(rchecksum, xdata, frame, op_ret, op_errno, + weak_cksum, strong_cksum, xdata); + return 0; +} + +int +pl_rchecksum(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + int32_t len, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_rchecksum_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->rchecksum, fd, offset, len, xdata); + return 0; +} + +int32_t +pl_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) +{ + PL_STACK_UNWIND_FOR_CLIENT(xattrop, xdata, frame, op_ret, op_errno, dict, + xdata); + return 0; +} + +int +pl_xattrop(call_frame_t *frame, xlator_t *this, loc_t *loc, + gf_xattrop_flags_t optype, dict_t *xattr, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_xattrop_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->xattrop, loc, optype, xattr, xdata); + return 0; +} + +int32_t +pl_fxattrop_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, dict_t *dict, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(fxattrop, xdata, frame, op_ret, op_errno, dict, + xdata); + return 0; +} + +int +pl_fxattrop(call_frame_t *frame, xlator_t *this, fd_t *fd, + gf_xattrop_flags_t optype, dict_t *xattr, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_fxattrop_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fxattrop, fd, optype, xattr, xdata); + return 0; +} + +int32_t +pl_setattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *statpre, + struct iatt *statpost, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(setattr, xdata, frame, op_ret, op_errno, statpre, + statpost, xdata); + return 0; +} + +int +pl_setattr(call_frame_t *frame, xlator_t *this, loc_t *loc, struct iatt *stbuf, + int32_t valid, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_setattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->setattr, loc, stbuf, valid, xdata); + return 0; +} + +int32_t +pl_fsetattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *statpre, + struct iatt *statpost, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(fsetattr, xdata, frame, op_ret, op_errno, + statpre, statpost, xdata); + return 0; +} + +int +pl_fsetattr(call_frame_t *frame, xlator_t *this, fd_t *fd, struct iatt *stbuf, + int32_t valid, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_fsetattr_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fsetattr, fd, stbuf, valid, xdata); + return 0; +} + +int32_t +pl_fallocate_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iatt *pre, + struct iatt *post, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(fallocate, xdata, frame, op_ret, op_errno, pre, + post, xdata); + return 0; +} + +int +pl_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t keep_size, + off_t offset, size_t len, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_fallocate_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fallocate, fd, keep_size, offset, len, + xdata); + return 0; +} + +int32_t +pl_readlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, const char *path, + struct iatt *buf, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(readlink, xdata, frame, op_ret, op_errno, path, + buf, xdata); + return 0; +} + +int +pl_readlink(call_frame_t *frame, xlator_t *this, loc_t *loc, size_t size, + dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_readlink_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readlink, loc, size, xdata); + return 0; +} +int32_t +pl_access_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(access, xdata, frame, op_ret, op_errno, xdata); + return 0; +} + +int +pl_access(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t mask, + dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, ((fd_t *)NULL), loc, NULL); + STACK_WIND(frame, pl_access_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->access, loc, mask, xdata); + return 0; +} -struct xlator_mops mops = { +int32_t +pl_seek_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, off_t offset, dict_t *xdata) +{ + PL_STACK_UNWIND_FOR_CLIENT(seek, xdata, frame, op_ret, op_errno, offset, + xdata); + return 0; +} + +int32_t +pl_seek(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + gf_seek_what_t what, dict_t *xdata) +{ + PL_LOCAL_GET_REQUESTS(frame, this, xdata, fd, NULL, NULL); + STACK_WIND(frame, pl_seek_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->seek, fd, offset, what, xdata); + return 0; +} + +struct xlator_fops fops = { + .lookup = pl_lookup, + .create = pl_create, + .fstat = pl_fstat, + .truncate = pl_truncate, + .ftruncate = pl_ftruncate, + .discard = pl_discard, + .zerofill = pl_zerofill, + .open = pl_open, + .readv = pl_readv, + .writev = pl_writev, + .lk = pl_lk, + .inodelk = pl_inodelk, + .finodelk = pl_finodelk, + .entrylk = pl_entrylk, + .fentrylk = pl_fentrylk, + .flush = pl_flush, + .opendir = pl_opendir, + .readdirp = pl_readdirp, + .setxattr = pl_setxattr, + .fsetxattr = pl_fsetxattr, + .getxattr = pl_getxattr, + .fgetxattr = pl_fgetxattr, + .removexattr = pl_removexattr, + .fremovexattr = pl_fremovexattr, + .rename = pl_rename, + .getactivelk = pl_getactivelk, + .setactivelk = pl_setactivelk, + .unlink = pl_unlink, + .access = pl_access, + .readlink = pl_readlink, + .fallocate = pl_fallocate, + .fsetattr = pl_fsetattr, + .setattr = pl_setattr, + .fxattrop = pl_fxattrop, + .xattrop = pl_xattrop, + .rchecksum = pl_rchecksum, + .statfs = pl_statfs, + .fsyncdir = pl_fsyncdir, + .readdir = pl_readdir, + .symlink = pl_symlink, + .link = pl_link, + .rmdir = pl_rmdir, + .mknod = pl_mknod, + .stat = pl_stat, + .seek = pl_seek, }; +struct xlator_dumpops dumpops = { + .inodectx = pl_dump_inode_priv, +}; struct xlator_cbks cbks = { - .forget = pl_forget, + .forget = pl_forget, + .release = pl_release, + .releasedir = pl_releasedir, + .client_destroy = pl_client_destroy_cbk, + .client_disconnect = pl_client_disconnect_cbk, }; - struct volume_options options[] = { - { .key = { "mandatory-locks", "mandatory" }, - .type = GF_OPTION_TYPE_BOOL - }, - { .key = {NULL} }, + {.key = {"mandatory-locking"}, + .type = GF_OPTION_TYPE_STR, + .default_value = "off", + .op_version = {GD_OP_VERSION_3_8_0}, + .flags = OPT_FLAG_SETTABLE | OPT_FLAG_DOC, + .tags = {"locks"}, + .description = "Specifies the mandatory-locking mode. Valid options " + "are 'file' to use linux style mandatory locks, " + "'forced' to use volume strictly under mandatory lock " + "semantics only and 'optimal' to treat advisory and " + "mandatory locks separately on their own."}, + {.key = {"trace"}, + .type = GF_OPTION_TYPE_BOOL, + .default_value = "off", + .op_version = {GD_OP_VERSION_3_7_0}, + .flags = OPT_FLAG_SETTABLE | OPT_FLAG_DOC, + .tags = {"locks"}, + .description = "Trace the different lock requests " + "to logs."}, + {.key = {"monkey-unlocking"}, + .type = GF_OPTION_TYPE_BOOL, + .default_value = "false", + .op_version = {GD_OP_VERSION_3_9_0}, + .flags = OPT_FLAG_SETTABLE, + .tags = {"locks"}, + .description = "Ignore a random number of unlock requests. Useful " + "for testing/creating robust lock recovery mechanisms."}, + { + .key = {"revocation-secs"}, + .type = GF_OPTION_TYPE_INT, + .min = 0, + .max = INT_MAX, + .default_value = "0", + .op_version = {GD_OP_VERSION_3_9_0}, + .flags = OPT_FLAG_SETTABLE | OPT_FLAG_DOC, + .tags = {"locks"}, + .description = "Maximum time a lock can be taken out, before" + "being revoked.", + }, + { + .key = {"revocation-clear-all"}, + .type = GF_OPTION_TYPE_BOOL, + .default_value = "false", + .op_version = {GD_OP_VERSION_3_9_0}, + .flags = OPT_FLAG_SETTABLE | OPT_FLAG_DOC, + .tags = {"locks"}, + .description = "If set to true, will revoke BOTH granted and blocked " + "(pending) lock requests if a revocation threshold is " + "hit.", + }, + {.key = {"revocation-max-blocked"}, + .type = GF_OPTION_TYPE_INT, + .min = 0, + .max = INT_MAX, + .default_value = "0", + .op_version = {GD_OP_VERSION_3_9_0}, + .flags = OPT_FLAG_SETTABLE | OPT_FLAG_DOC, + .tags = {"locks"}, + .description = "A number of blocked lock requests after which a lock " + "will be revoked to allow the others to proceed. Can " + "be used in conjunction w/ revocation-clear-all."}, + {.key = {"notify-contention"}, + .type = GF_OPTION_TYPE_BOOL, + .default_value = "yes", + .flags = OPT_FLAG_SETTABLE | OPT_FLAG_DOC, + .op_version = {GD_OP_VERSION_4_0_0}, + .tags = {"locks", "contention"}, + .description = "When this option is enabled and a lock request " + "conflicts with a currently granted lock, an upcall " + "notification will be sent to the current owner of " + "the lock to request it to be released as soon as " + "possible."}, + {.key = {"notify-contention-delay"}, + .type = GF_OPTION_TYPE_INT, + .min = 0, /* An upcall notification is sent every time a conflict is + * detected. */ + .max = 60, + .default_value = "5", + .flags = OPT_FLAG_SETTABLE | OPT_FLAG_DOC, + .op_version = {GD_OP_VERSION_4_0_0}, + .tags = {"locks", "contention", "timeout"}, + .description = "This value determines the minimum amount of time " + "(in seconds) between upcall contention notifications " + "on the same inode. If multiple lock requests are " + "received during this period, only one upcall will " + "be sent."}, + {.key = {"enforce-mandatory-lock"}, + .type = GF_OPTION_TYPE_BOOL, + .default_value = "off", + .flags = OPT_FLAG_SETTABLE, + .op_version = {GD_OP_VERSION_6_0}, + .description = "option to enable lock enforcement"}, + {.key = {NULL}}, +}; + +xlator_api_t xlator_api = { + .init = init, + .fini = fini, + .reconfigure = reconfigure, + .mem_acct_init = mem_acct_init, + .op_version = {1}, /* Present from the initial version */ + .dumpops = &dumpops, + .fops = &fops, + .cbks = &cbks, + .options = options, + .identifier = "locks", + .category = GF_MAINTAINED, }; |