mirror of
git://sourceware.org/git/lvm2.git
synced 2024-10-28 03:27:58 +03:00
aec2115410
Fixing some const warnings - with API change in: int vg_extend(struct volume_group *vg, int pv_count, const char *const *pv_names, Change is needed - as lvm2api expects const behaviour here. So vg_extend() is doing local strdup for unescaping. skip_dev_dir return const char* from const char* vg_name. Rest of the patch is cleanup of related warnings. Also using dm_report_filed_string() API change to simplify casting in _string_disp and _lvname_disp.
1497 lines
32 KiB
C
1497 lines
32 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "lib.h"
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#include "metadata.h"
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#include "activate.h"
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#include "memlock.h"
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#include "display.h"
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#include "fs.h"
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#include "lvm-exec.h"
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#include "lvm-file.h"
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#include "lvm-string.h"
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#include "toolcontext.h"
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#include "dev_manager.h"
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#include "str_list.h"
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#include "config.h"
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#include "filter.h"
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#include "segtype.h"
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#include "sharedlib.h"
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#include <limits.h>
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#include <fcntl.h>
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#include <unistd.h>
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#define _skip(fmt, args...) log_very_verbose("Skipping: " fmt , ## args)
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int lvm1_present(struct cmd_context *cmd)
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{
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char path[PATH_MAX];
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if (dm_snprintf(path, sizeof(path), "%s/lvm/global", cmd->proc_dir)
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< 0) {
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log_error("LVM1 proc global snprintf failed");
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return 0;
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}
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if (path_exists(path))
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return 1;
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else
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return 0;
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}
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int list_segment_modules(struct dm_pool *mem, const struct lv_segment *seg,
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struct dm_list *modules)
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{
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unsigned int s;
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struct lv_segment *seg2, *snap_seg;
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struct dm_list *snh;
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if (seg->segtype->ops->modules_needed &&
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!seg->segtype->ops->modules_needed(mem, seg, modules)) {
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log_error("module string allocation failed");
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return 0;
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}
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if (lv_is_origin(seg->lv))
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dm_list_iterate(snh, &seg->lv->snapshot_segs)
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if (!list_lv_modules(mem,
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dm_list_struct_base(snh,
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struct lv_segment,
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origin_list)->cow,
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modules))
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return_0;
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if (lv_is_cow(seg->lv)) {
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snap_seg = find_cow(seg->lv);
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if (snap_seg->segtype->ops->modules_needed &&
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!snap_seg->segtype->ops->modules_needed(mem, snap_seg,
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modules)) {
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log_error("snap_seg module string allocation failed");
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return 0;
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}
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}
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for (s = 0; s < seg->area_count; s++) {
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switch (seg_type(seg, s)) {
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case AREA_LV:
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seg2 = find_seg_by_le(seg_lv(seg, s), seg_le(seg, s));
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if (seg2 && !list_segment_modules(mem, seg2, modules))
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return_0;
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break;
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case AREA_PV:
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case AREA_UNASSIGNED:
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;
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}
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}
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return 1;
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}
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int list_lv_modules(struct dm_pool *mem, const struct logical_volume *lv,
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struct dm_list *modules)
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{
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struct lv_segment *seg;
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dm_list_iterate_items(seg, &lv->segments)
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if (!list_segment_modules(mem, seg, modules))
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return_0;
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return 1;
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}
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#ifndef DEVMAPPER_SUPPORT
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void set_activation(int act)
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{
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static int warned = 0;
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if (warned || !act)
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return;
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log_error("Compiled without libdevmapper support. "
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"Can't enable activation.");
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warned = 1;
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}
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int activation(void)
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{
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return 0;
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}
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int library_version(char *version, size_t size)
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{
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return 0;
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}
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int driver_version(char *version, size_t size)
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{
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return 0;
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}
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int target_version(const char *target_name, uint32_t *maj,
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uint32_t *min, uint32_t *patchlevel)
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{
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return 0;
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}
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int target_present(struct cmd_context *cmd, const char *target_name,
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int use_modprobe)
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{
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return 0;
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}
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int lv_info(struct cmd_context *cmd, const struct logical_volume *lv, unsigned origin_only,
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struct lvinfo *info, int with_open_count, int with_read_ahead)
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{
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return 0;
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}
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int lv_info_by_lvid(struct cmd_context *cmd, const char *lvid_s,
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unsigned origin_only,
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struct lvinfo *info, int with_open_count, int with_read_ahead)
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{
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return 0;
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}
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int lv_snapshot_percent(const struct logical_volume *lv, percent_t *percent)
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{
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return 0;
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}
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int lv_mirror_percent(struct cmd_context *cmd, const struct logical_volume *lv,
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int wait, percent_t *percent, uint32_t *event_nr)
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{
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return 0;
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}
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int lvs_in_vg_activated(struct volume_group *vg)
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{
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return 0;
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}
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int lvs_in_vg_opened(const struct volume_group *vg)
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{
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return 0;
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}
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/******
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int lv_suspend(struct cmd_context *cmd, const char *lvid_s)
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{
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return 1;
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}
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*******/
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int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only)
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{
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return 1;
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}
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int lv_resume(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only)
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{
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return 1;
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}
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int lv_resume_if_active(struct cmd_context *cmd, const char *lvid_s,
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unsigned origin_only, unsigned exclusive)
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{
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return 1;
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}
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int lv_deactivate(struct cmd_context *cmd, const char *lvid_s)
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{
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return 1;
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}
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int lv_activation_filter(struct cmd_context *cmd, const char *lvid_s,
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int *activate_lv)
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{
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return 1;
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}
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int lv_activate(struct cmd_context *cmd, const char *lvid_s, int exclusive)
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{
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return 1;
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}
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int lv_activate_with_filter(struct cmd_context *cmd, const char *lvid_s, int exclusive)
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{
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return 1;
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}
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int lv_mknodes(struct cmd_context *cmd, const struct logical_volume *lv)
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{
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return 1;
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}
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int pv_uses_vg(struct physical_volume *pv,
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struct volume_group *vg)
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{
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return 0;
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}
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void activation_release(void)
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{
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}
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void activation_exit(void)
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{
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}
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int lv_is_active(struct logical_volume *lv)
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{
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return 0;
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}
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int lv_is_active_exclusive_locally(struct logical_volume *lv)
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{
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return 0;
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}
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int lv_is_active_exclusive_remotely(struct logical_volume *lv)
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{
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return 0;
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}
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int lv_check_transient(struct logical_volume *lv)
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{
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return 1;
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}
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int monitor_dev_for_events(struct cmd_context *cmd, struct logical_volume *lv,
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unsigned origin_only, int monitor)
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{
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return 1;
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}
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#else /* DEVMAPPER_SUPPORT */
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static int _activation = 1;
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void set_activation(int act)
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{
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if (act == _activation)
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return;
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_activation = act;
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if (_activation)
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log_verbose("Activation enabled. Device-mapper kernel "
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"driver will be used.");
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else
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log_warn("WARNING: Activation disabled. No device-mapper "
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"interaction will be attempted.");
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}
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int activation(void)
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{
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return _activation;
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}
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static int _passes_activation_filter(struct cmd_context *cmd,
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struct logical_volume *lv)
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{
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const struct config_node *cn;
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const struct config_value *cv;
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const char *str;
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char path[PATH_MAX];
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if (!(cn = find_config_tree_node(cmd, "activation/volume_list"))) {
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log_verbose("activation/volume_list configuration setting "
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"not defined, checking only host tags for %s/%s",
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lv->vg->name, lv->name);
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/* If no host tags defined, activate */
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if (dm_list_empty(&cmd->tags))
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return 1;
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/* If any host tag matches any LV or VG tag, activate */
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if (str_list_match_list(&cmd->tags, &lv->tags, NULL) ||
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str_list_match_list(&cmd->tags, &lv->vg->tags, NULL))
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return 1;
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log_verbose("No host tag matches %s/%s",
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lv->vg->name, lv->name);
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/* Don't activate */
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return 0;
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}
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else
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log_verbose("activation/volume_list configuration setting "
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"defined, checking the list to match %s/%s",
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lv->vg->name, lv->name);
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for (cv = cn->v; cv; cv = cv->next) {
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if (cv->type != CFG_STRING) {
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log_error("Ignoring invalid string in config file "
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"activation/volume_list");
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continue;
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}
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str = cv->v.str;
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if (!*str) {
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log_error("Ignoring empty string in config file "
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"activation/volume_list");
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continue;
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}
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/* Tag? */
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if (*str == '@') {
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str++;
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if (!*str) {
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log_error("Ignoring empty tag in config file "
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"activation/volume_list");
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continue;
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}
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/* If any host tag matches any LV or VG tag, activate */
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if (!strcmp(str, "*")) {
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if (str_list_match_list(&cmd->tags, &lv->tags, NULL)
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|| str_list_match_list(&cmd->tags,
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&lv->vg->tags, NULL))
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return 1;
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else
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continue;
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}
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/* If supplied tag matches LV or VG tag, activate */
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if (str_list_match_item(&lv->tags, str) ||
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str_list_match_item(&lv->vg->tags, str))
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return 1;
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else
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continue;
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}
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if (!strchr(str, '/')) {
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/* vgname supplied */
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if (!strcmp(str, lv->vg->name))
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return 1;
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else
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continue;
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}
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/* vgname/lvname */
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if (dm_snprintf(path, sizeof(path), "%s/%s", lv->vg->name,
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lv->name) < 0) {
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log_error("dm_snprintf error from %s/%s", lv->vg->name,
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lv->name);
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continue;
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}
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if (!strcmp(path, str))
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return 1;
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}
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log_verbose("No item supplied in activation/volume_list configuration "
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"setting matches %s/%s", lv->vg->name, lv->name);
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return 0;
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}
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int library_version(char *version, size_t size)
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{
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if (!activation())
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return 0;
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return dm_get_library_version(version, size);
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}
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int driver_version(char *version, size_t size)
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{
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if (!activation())
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return 0;
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log_very_verbose("Getting driver version");
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return dm_driver_version(version, size);
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}
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int target_version(const char *target_name, uint32_t *maj,
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uint32_t *min, uint32_t *patchlevel)
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{
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int r = 0;
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struct dm_task *dmt;
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struct dm_versions *target, *last_target;
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log_very_verbose("Getting target version for %s", target_name);
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if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
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return_0;
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if (!dm_task_run(dmt)) {
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log_debug("Failed to get %s target version", target_name);
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/* Assume this was because LIST_VERSIONS isn't supported */
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return 1;
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}
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target = dm_task_get_versions(dmt);
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do {
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last_target = target;
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if (!strcmp(target_name, target->name)) {
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r = 1;
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*maj = target->version[0];
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*min = target->version[1];
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*patchlevel = target->version[2];
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goto out;
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}
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target = (struct dm_versions *)((char *) target + target->next);
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} while (last_target != target);
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out:
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dm_task_destroy(dmt);
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return r;
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}
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int module_present(struct cmd_context *cmd, const char *target_name)
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{
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int ret = 0;
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#ifdef MODPROBE_CMD
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char module[128];
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const char *argv[3];
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if (dm_snprintf(module, sizeof(module), "dm-%s", target_name) < 0) {
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log_error("module_present module name too long: %s",
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target_name);
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return 0;
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}
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argv[0] = MODPROBE_CMD;
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argv[1] = module;
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argv[2] = NULL;
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ret = exec_cmd(cmd, argv, NULL, 0);
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#endif
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return ret;
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}
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int target_present(struct cmd_context *cmd, const char *target_name,
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int use_modprobe)
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{
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uint32_t maj, min, patchlevel;
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if (!activation())
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return 0;
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#ifdef MODPROBE_CMD
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if (use_modprobe) {
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if (target_version(target_name, &maj, &min, &patchlevel))
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return 1;
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if (!module_present(cmd, target_name))
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return_0;
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}
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#endif
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return target_version(target_name, &maj, &min, &patchlevel);
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}
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|
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/*
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* Returns 1 if info structure populated, else 0 on failure.
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*/
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int lv_info(struct cmd_context *cmd, const struct logical_volume *lv, unsigned origin_only,
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struct lvinfo *info, int with_open_count, int with_read_ahead)
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{
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struct dm_info dminfo;
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|
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if (!activation())
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return 0;
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/*
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* If open_count info is requested and we have to be sure our own udev
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* transactions are finished
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* For non-clustered locking type we are only interested for non-delete operation
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* in progress - as only those could lead to opened files
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*/
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if (with_open_count) {
|
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if (locking_is_clustered())
|
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sync_local_dev_names(cmd); /* Wait to have udev in sync */
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else if (fs_has_non_delete_ops())
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fs_unlock(); /* For non clustered - wait if there are non-delete ops */
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}
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|
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if (!dev_manager_info(lv->vg->cmd->mem, lv, origin_only ? "real" : NULL, with_open_count,
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with_read_ahead, &dminfo, &info->read_ahead))
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return_0;
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|
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info->exists = dminfo.exists;
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info->suspended = dminfo.suspended;
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info->open_count = dminfo.open_count;
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info->major = dminfo.major;
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info->minor = dminfo.minor;
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info->read_only = dminfo.read_only;
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info->live_table = dminfo.live_table;
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info->inactive_table = dminfo.inactive_table;
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|
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return 1;
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}
|
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|
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int lv_info_by_lvid(struct cmd_context *cmd, const char *lvid_s,
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unsigned origin_only,
|
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struct lvinfo *info, int with_open_count, int with_read_ahead)
|
|
{
|
|
int r;
|
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struct logical_volume *lv;
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|
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if (!(lv = lv_from_lvid(cmd, lvid_s, 0)))
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return 0;
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|
|
if (!lv_is_origin(lv))
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origin_only = 0;
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|
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r = lv_info(cmd, lv, origin_only, info, with_open_count, with_read_ahead);
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free_vg(lv->vg);
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|
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return r;
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}
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|
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/*
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* Returns 1 if percent set, else 0 on failure.
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*/
|
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int lv_check_transient(struct logical_volume *lv)
|
|
{
|
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int r;
|
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struct dev_manager *dm;
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|
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if (!activation())
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return 0;
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|
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if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name)))
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return_0;
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|
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if (!(r = dev_manager_transient(dm, lv)))
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stack;
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|
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dev_manager_destroy(dm);
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|
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return r;
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}
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|
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/*
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* Returns 1 if percent set, else 0 on failure.
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*/
|
|
int lv_snapshot_percent(const struct logical_volume *lv, percent_t *percent)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name)))
|
|
return_0;
|
|
|
|
if (!(r = dev_manager_snapshot_percent(dm, lv, percent)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
|
|
return r;
|
|
}
|
|
|
|
/* FIXME Merge with snapshot_percent */
|
|
int lv_mirror_percent(struct cmd_context *cmd, const struct logical_volume *lv,
|
|
int wait, percent_t *percent, uint32_t *event_nr)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
struct lvinfo info;
|
|
|
|
/* If mirrored LV is temporarily shrinked to 1 area (= linear),
|
|
* it should be considered in-sync. */
|
|
if (dm_list_size(&lv->segments) == 1 && first_seg(lv)->area_count == 1) {
|
|
*percent = PERCENT_100;
|
|
return 1;
|
|
}
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
if (!lv_info(cmd, lv, 0, &info, 0, 0))
|
|
return_0;
|
|
|
|
if (!info.exists)
|
|
return 0;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name)))
|
|
return_0;
|
|
|
|
if (!(r = dev_manager_mirror_percent(dm, lv, wait, percent, event_nr)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int _lv_active(struct cmd_context *cmd, struct logical_volume *lv)
|
|
{
|
|
struct lvinfo info;
|
|
|
|
if (!lv_info(cmd, lv, 0, &info, 0, 0)) {
|
|
stack;
|
|
return -1;
|
|
}
|
|
|
|
return info.exists;
|
|
}
|
|
|
|
static int _lv_open_count(struct cmd_context *cmd, struct logical_volume *lv)
|
|
{
|
|
struct lvinfo info;
|
|
|
|
if (!lv_info(cmd, lv, 0, &info, 1, 0)) {
|
|
stack;
|
|
return -1;
|
|
}
|
|
|
|
return info.open_count;
|
|
}
|
|
|
|
static int _lv_activate_lv(struct logical_volume *lv, unsigned origin_only)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name)))
|
|
return_0;
|
|
|
|
if (!(r = dev_manager_activate(dm, lv, origin_only)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
return r;
|
|
}
|
|
|
|
static int _lv_preload(struct logical_volume *lv, unsigned origin_only, int *flush_required)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name)))
|
|
return_0;
|
|
|
|
if (!(r = dev_manager_preload(dm, lv, origin_only, flush_required)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
return r;
|
|
}
|
|
|
|
static int _lv_deactivate(struct logical_volume *lv)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name)))
|
|
return_0;
|
|
|
|
if (!(r = dev_manager_deactivate(dm, lv)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
return r;
|
|
}
|
|
|
|
static int _lv_suspend_lv(struct logical_volume *lv, unsigned origin_only, int lockfs, int flush_required)
|
|
{
|
|
int r;
|
|
struct dev_manager *dm;
|
|
|
|
if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name)))
|
|
return_0;
|
|
|
|
if (!(r = dev_manager_suspend(dm, lv, origin_only, lockfs, flush_required)))
|
|
stack;
|
|
|
|
dev_manager_destroy(dm);
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* These two functions return the number of visible LVs in the state,
|
|
* or -1 on error.
|
|
*/
|
|
int lvs_in_vg_activated(struct volume_group *vg)
|
|
{
|
|
struct lv_list *lvl;
|
|
int count = 0;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
dm_list_iterate_items(lvl, &vg->lvs) {
|
|
if (lv_is_visible(lvl->lv))
|
|
count += (_lv_active(vg->cmd, lvl->lv) == 1);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
int lvs_in_vg_opened(const struct volume_group *vg)
|
|
{
|
|
const struct lv_list *lvl;
|
|
int count = 0;
|
|
|
|
if (!activation())
|
|
return 0;
|
|
|
|
dm_list_iterate_items(lvl, &vg->lvs) {
|
|
if (lv_is_visible(lvl->lv))
|
|
count += (_lv_open_count(vg->cmd, lvl->lv) > 0);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* _lv_is_active
|
|
* @lv: logical volume being queried
|
|
* @locally: set if active locally (when provided)
|
|
* @exclusive: set if active exclusively (when provided)
|
|
*
|
|
* Determine whether an LV is active locally or in a cluster.
|
|
* In addition to the return code which indicates whether or
|
|
* not the LV is active somewhere, two other values are set
|
|
* to yield more information about the status of the activation:
|
|
* return locally exclusively status
|
|
* ====== ======= =========== ======
|
|
* 0 0 0 not active
|
|
* 1 0 0 active remotely
|
|
* 1 0 1 exclusive remotely
|
|
* 1 1 0 active locally and possibly remotely
|
|
* 1 1 1 exclusive locally (or local && !cluster)
|
|
* The VG lock must be held to call this function.
|
|
*
|
|
* Returns: 0 or 1
|
|
*/
|
|
static int _lv_is_active(struct logical_volume *lv,
|
|
int *locally, int *exclusive)
|
|
{
|
|
int r, l, e; /* remote, local, and exclusive */
|
|
|
|
r = l = e = 0;
|
|
|
|
if (_lv_active(lv->vg->cmd, lv))
|
|
l = 1;
|
|
|
|
if (!vg_is_clustered(lv->vg)) {
|
|
e = 1; /* exclusive by definition */
|
|
goto out;
|
|
}
|
|
|
|
/* Active locally, and the caller doesn't care about exclusive */
|
|
if (l && !exclusive)
|
|
goto out;
|
|
|
|
if ((r = remote_lock_held(lv->lvid.s, &e)) >= 0)
|
|
goto out;
|
|
|
|
/*
|
|
* If lock query is not supported (due to interfacing with old
|
|
* code), then we cannot evaluate exclusivity properly.
|
|
*
|
|
* Old users of this function will never be affected by this,
|
|
* since they are only concerned about active vs. not active.
|
|
* New users of this function who specifically ask for 'exclusive'
|
|
* will be given an error message.
|
|
*/
|
|
if (l) {
|
|
if (exclusive)
|
|
log_error("Unable to determine exclusivity of %s",
|
|
lv->name);
|
|
goto out;
|
|
}
|
|
|
|
if (activate_lv_excl(lv->vg->cmd, lv)) {
|
|
if (!deactivate_lv(lv->vg->cmd, lv))
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
out:
|
|
if (locally)
|
|
*locally = l;
|
|
if (exclusive)
|
|
*exclusive = e;
|
|
|
|
log_very_verbose("%s/%s is %sactive%s%s",
|
|
lv->vg->name, lv->name,
|
|
(r || l) ? "" : "not ",
|
|
(exclusive && e) ? " exclusive" : "",
|
|
e ? (l ? " locally" : " remotely") : "");
|
|
|
|
return r || l;
|
|
}
|
|
|
|
int lv_is_active(struct logical_volume *lv)
|
|
{
|
|
return _lv_is_active(lv, NULL, NULL);
|
|
}
|
|
|
|
/*
|
|
int lv_is_active_locally(struct logical_volume *lv)
|
|
{
|
|
int l;
|
|
return _lv_is_active(lv, &l, NULL) && l;
|
|
}
|
|
*/
|
|
|
|
int lv_is_active_exclusive_locally(struct logical_volume *lv)
|
|
{
|
|
int l, e;
|
|
return _lv_is_active(lv, &l, &e) && l && e;
|
|
}
|
|
|
|
int lv_is_active_exclusive_remotely(struct logical_volume *lv)
|
|
{
|
|
int l, e;
|
|
return _lv_is_active(lv, &l, &e) && !l && e;
|
|
}
|
|
|
|
#ifdef DMEVENTD
|
|
static struct dm_event_handler *_create_dm_event_handler(struct cmd_context *cmd, const char *dmuuid, const char *dso,
|
|
const int timeout, enum dm_event_mask mask)
|
|
{
|
|
struct dm_event_handler *dmevh;
|
|
|
|
if (!(dmevh = dm_event_handler_create()))
|
|
return_NULL;
|
|
|
|
if (dm_event_handler_set_dmeventd_path(dmevh, find_config_tree_str(cmd, "dmeventd/executable", NULL)))
|
|
goto_bad;
|
|
|
|
if (dm_event_handler_set_dso(dmevh, dso))
|
|
goto_bad;
|
|
|
|
if (dm_event_handler_set_uuid(dmevh, dmuuid))
|
|
goto_bad;
|
|
|
|
dm_event_handler_set_timeout(dmevh, timeout);
|
|
dm_event_handler_set_event_mask(dmevh, mask);
|
|
|
|
return dmevh;
|
|
|
|
bad:
|
|
dm_event_handler_destroy(dmevh);
|
|
return NULL;
|
|
}
|
|
|
|
char *get_monitor_dso_path(struct cmd_context *cmd, const char *libpath)
|
|
{
|
|
char *path;
|
|
|
|
if (!(path = dm_pool_alloc(cmd->mem, PATH_MAX))) {
|
|
log_error("Failed to allocate dmeventd library path.");
|
|
return NULL;
|
|
}
|
|
|
|
get_shared_library_path(cmd, libpath, path, PATH_MAX);
|
|
|
|
return path;
|
|
}
|
|
|
|
int target_registered_with_dmeventd(struct cmd_context *cmd, const char *dso,
|
|
struct logical_volume *lv, int *pending)
|
|
{
|
|
char *uuid;
|
|
enum dm_event_mask evmask = 0;
|
|
struct dm_event_handler *dmevh;
|
|
|
|
*pending = 0;
|
|
|
|
if (!dso)
|
|
return_0;
|
|
|
|
/* We always monitor the "real" device, never the "snapshot-origin" itself. */
|
|
if (!(uuid = build_dm_uuid(cmd->mem, lv->lvid.s, lv_is_origin(lv) ? "real" : NULL)))
|
|
return_0;
|
|
|
|
if (!(dmevh = _create_dm_event_handler(cmd, uuid, dso, 0, DM_EVENT_ALL_ERRORS)))
|
|
return_0;
|
|
|
|
if (dm_event_get_registered_device(dmevh, 0)) {
|
|
dm_event_handler_destroy(dmevh);
|
|
return 0;
|
|
}
|
|
|
|
evmask = dm_event_handler_get_event_mask(dmevh);
|
|
if (evmask & DM_EVENT_REGISTRATION_PENDING) {
|
|
*pending = 1;
|
|
evmask &= ~DM_EVENT_REGISTRATION_PENDING;
|
|
}
|
|
|
|
dm_event_handler_destroy(dmevh);
|
|
|
|
return evmask;
|
|
}
|
|
|
|
int target_register_events(struct cmd_context *cmd, const char *dso, struct logical_volume *lv,
|
|
int evmask __attribute__((unused)), int set, int timeout)
|
|
{
|
|
char *uuid;
|
|
struct dm_event_handler *dmevh;
|
|
int r;
|
|
|
|
if (!dso)
|
|
return_0;
|
|
|
|
/* We always monitor the "real" device, never the "snapshot-origin" itself. */
|
|
if (!(uuid = build_dm_uuid(cmd->mem, lv->lvid.s, lv_is_origin(lv) ? "real" : NULL)))
|
|
return_0;
|
|
|
|
if (!(dmevh = _create_dm_event_handler(cmd, uuid, dso, timeout,
|
|
DM_EVENT_ALL_ERRORS | (timeout ? DM_EVENT_TIMEOUT : 0))))
|
|
return_0;
|
|
|
|
r = set ? dm_event_register_handler(dmevh) : dm_event_unregister_handler(dmevh);
|
|
|
|
dm_event_handler_destroy(dmevh);
|
|
|
|
if (!r)
|
|
return_0;
|
|
|
|
log_info("%s %s for events", set ? "Monitored" : "Unmonitored", uuid);
|
|
|
|
return 1;
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Returns 0 if an attempt to (un)monitor the device failed.
|
|
* Returns 1 otherwise.
|
|
*/
|
|
int monitor_dev_for_events(struct cmd_context *cmd, struct logical_volume *lv,
|
|
unsigned origin_only, int monitor)
|
|
{
|
|
#ifdef DMEVENTD
|
|
int i, pending = 0, monitored;
|
|
int r = 1;
|
|
struct dm_list *tmp, *snh, *snht;
|
|
struct lv_segment *seg;
|
|
struct lv_segment *log_seg;
|
|
int (*monitor_fn) (struct lv_segment *s, int e);
|
|
uint32_t s;
|
|
|
|
/* skip dmeventd code altogether */
|
|
if (dmeventd_monitor_mode() == DMEVENTD_MONITOR_IGNORE)
|
|
return 1;
|
|
|
|
/*
|
|
* Nothing to do if dmeventd configured not to be used.
|
|
*/
|
|
if (monitor && !dmeventd_monitor_mode())
|
|
return 1;
|
|
|
|
/*
|
|
* In case of a snapshot device, we monitor lv->snapshot->lv,
|
|
* not the actual LV itself.
|
|
*/
|
|
if (lv_is_cow(lv) && !lv_is_merging_cow(lv))
|
|
return monitor_dev_for_events(cmd, lv->snapshot->lv, 0, monitor);
|
|
|
|
/*
|
|
* In case this LV is a snapshot origin, we instead monitor
|
|
* each of its respective snapshots. The origin itself may
|
|
* also need to be monitored if it is a mirror, for example.
|
|
*/
|
|
if (!origin_only && lv_is_origin(lv))
|
|
dm_list_iterate_safe(snh, snht, &lv->snapshot_segs)
|
|
if (!monitor_dev_for_events(cmd, dm_list_struct_base(snh,
|
|
struct lv_segment, origin_list)->cow, 0, monitor))
|
|
r = 0;
|
|
|
|
/*
|
|
* If the volume is mirrored and its log is also mirrored, monitor
|
|
* the log volume as well.
|
|
*/
|
|
if ((seg = first_seg(lv)) != NULL && seg->log_lv != NULL &&
|
|
(log_seg = first_seg(seg->log_lv)) != NULL &&
|
|
seg_is_mirrored(log_seg))
|
|
if (!monitor_dev_for_events(cmd, seg->log_lv, 0, monitor))
|
|
r = 0;
|
|
|
|
dm_list_iterate(tmp, &lv->segments) {
|
|
seg = dm_list_item(tmp, struct lv_segment);
|
|
|
|
/* Recurse for AREA_LV */
|
|
for (s = 0; s < seg->area_count; s++) {
|
|
if (seg_type(seg, s) != AREA_LV)
|
|
continue;
|
|
if (!monitor_dev_for_events(cmd, seg_lv(seg, s), 0,
|
|
monitor)) {
|
|
log_error("Failed to %smonitor %s",
|
|
monitor ? "" : "un",
|
|
seg_lv(seg, s)->name);
|
|
r = 0;
|
|
}
|
|
}
|
|
|
|
if (!seg_monitored(seg) || (seg->status & PVMOVE))
|
|
continue;
|
|
|
|
monitor_fn = NULL;
|
|
|
|
/* Check monitoring status */
|
|
if (seg->segtype->ops->target_monitored)
|
|
monitored = seg->segtype->ops->target_monitored(seg, &pending);
|
|
else
|
|
continue; /* segtype doesn't support registration */
|
|
|
|
/*
|
|
* FIXME: We should really try again if pending
|
|
*/
|
|
monitored = (pending) ? 0 : monitored;
|
|
|
|
if (monitor) {
|
|
if (monitored)
|
|
log_verbose("%s/%s already monitored.", lv->vg->name, lv->name);
|
|
else if (seg->segtype->ops->target_monitor_events)
|
|
monitor_fn = seg->segtype->ops->target_monitor_events;
|
|
} else {
|
|
if (!monitored)
|
|
log_verbose("%s/%s already not monitored.", lv->vg->name, lv->name);
|
|
else if (seg->segtype->ops->target_unmonitor_events)
|
|
monitor_fn = seg->segtype->ops->target_unmonitor_events;
|
|
}
|
|
|
|
/* Do [un]monitor */
|
|
if (!monitor_fn)
|
|
continue;
|
|
|
|
log_verbose("%sonitoring %s/%s%s", monitor ? "M" : "Not m", lv->vg->name, lv->name,
|
|
test_mode() ? " [Test mode: skipping this]" : "");
|
|
|
|
/* FIXME Test mode should really continue a bit further. */
|
|
if (test_mode())
|
|
continue;
|
|
|
|
/* FIXME specify events */
|
|
if (!monitor_fn(seg, 0)) {
|
|
log_error("%s/%s: %s segment monitoring function failed.",
|
|
lv->vg->name, lv->name, seg->segtype->name);
|
|
return 0;
|
|
}
|
|
|
|
/* Check [un]monitor results */
|
|
/* Try a couple times if pending, but not forever... */
|
|
for (i = 0; i < 10; i++) {
|
|
pending = 0;
|
|
monitored = seg->segtype->ops->target_monitored(seg, &pending);
|
|
if (pending ||
|
|
(!monitored && monitor) ||
|
|
(monitored && !monitor))
|
|
log_very_verbose("%s/%s %smonitoring still pending: waiting...",
|
|
lv->vg->name, lv->name, monitor ? "" : "un");
|
|
else
|
|
break;
|
|
sleep(1);
|
|
}
|
|
|
|
if (r)
|
|
r = (monitored && monitor) || (!monitored && !monitor);
|
|
}
|
|
|
|
return r;
|
|
#else
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
static int _lv_suspend(struct cmd_context *cmd, const char *lvid_s,
|
|
unsigned origin_only, int error_if_not_suspended)
|
|
{
|
|
struct logical_volume *lv = NULL, *lv_pre = NULL;
|
|
struct lvinfo info;
|
|
int r = 0, lockfs = 0, flush_required = 0;
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s, 0)))
|
|
goto_out;
|
|
|
|
/* Use precommitted metadata if present */
|
|
if (!(lv_pre = lv_from_lvid(cmd, lvid_s, 1)))
|
|
goto_out;
|
|
|
|
/* Ignore origin_only unless LV is origin in both old and new metadata */
|
|
if (!lv_is_origin(lv) || !lv_is_origin(lv_pre))
|
|
origin_only = 0;
|
|
|
|
if (test_mode()) {
|
|
_skip("Suspending %s%s.", lv->name, origin_only ? " origin without snapshots" : "");
|
|
r = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (!lv_info(cmd, lv, origin_only, &info, 0, 0))
|
|
goto_out;
|
|
|
|
if (!info.exists || info.suspended) {
|
|
if (!error_if_not_suspended) {
|
|
r = 1;
|
|
if (info.suspended)
|
|
critical_section_inc(cmd);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (!lv_read_replicator_vgs(lv))
|
|
goto_out;
|
|
|
|
lv_calculate_readahead(lv, NULL);
|
|
|
|
/* If VG was precommitted, preload devices for the LV */
|
|
if ((lv_pre->vg->status & PRECOMMITTED)) {
|
|
if (!_lv_preload(lv_pre, origin_only, &flush_required)) {
|
|
/* FIXME Revert preloading */
|
|
goto_out;
|
|
}
|
|
}
|
|
|
|
if (!monitor_dev_for_events(cmd, lv, origin_only, 0))
|
|
/* FIXME Consider aborting here */
|
|
stack;
|
|
|
|
critical_section_inc(cmd);
|
|
|
|
if (!origin_only &&
|
|
(lv_is_origin(lv_pre) || lv_is_cow(lv_pre)))
|
|
lockfs = 1;
|
|
|
|
if (!_lv_suspend_lv(lv, origin_only, lockfs, flush_required)) {
|
|
critical_section_dec(cmd);
|
|
goto out;
|
|
}
|
|
|
|
r = 1;
|
|
out:
|
|
if (lv_pre)
|
|
free_vg(lv_pre->vg);
|
|
if (lv) {
|
|
lv_release_replicator_vgs(lv);
|
|
free_vg(lv->vg);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Returns success if the device is not active */
|
|
int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only)
|
|
{
|
|
return _lv_suspend(cmd, lvid_s, origin_only, 0);
|
|
}
|
|
|
|
/* No longer used */
|
|
/***********
|
|
int lv_suspend(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return _lv_suspend(cmd, lvid_s, 1);
|
|
}
|
|
***********/
|
|
|
|
/*
|
|
* _lv_resume
|
|
* @cmd
|
|
* @lvid_s
|
|
* @origin_only
|
|
* @exclusive: This parameter only has an affect in cluster-context.
|
|
* It forces local target type to be used (instead of
|
|
* cluster-aware type).
|
|
* @error_if_not_active
|
|
*/
|
|
static int _lv_resume(struct cmd_context *cmd, const char *lvid_s,
|
|
unsigned origin_only, unsigned exclusive,
|
|
int error_if_not_active)
|
|
{
|
|
struct logical_volume *lv;
|
|
struct lvinfo info;
|
|
int r = 0;
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s, 0)))
|
|
goto_out;
|
|
|
|
if (!lv_is_origin(lv))
|
|
origin_only = 0;
|
|
|
|
if (test_mode()) {
|
|
_skip("Resuming %s%s.", lv->name, origin_only ? " without snapshots" : "");
|
|
r = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (!lv_info(cmd, lv, origin_only, &info, 0, 0))
|
|
goto_out;
|
|
|
|
if (!info.exists || !info.suspended) {
|
|
if (error_if_not_active)
|
|
goto_out;
|
|
r = 1;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* When targets are activated exclusively in a cluster, the
|
|
* non-clustered target should be used. This only happens
|
|
* if ACTIVATE_EXCL is set in lv->status.
|
|
*/
|
|
if (exclusive)
|
|
lv->status |= ACTIVATE_EXCL;
|
|
|
|
if (!_lv_activate_lv(lv, origin_only))
|
|
goto_out;
|
|
|
|
critical_section_dec(cmd);
|
|
|
|
if (!monitor_dev_for_events(cmd, lv, origin_only, 1))
|
|
stack;
|
|
|
|
r = 1;
|
|
out:
|
|
if (lv)
|
|
free_vg(lv->vg);
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Returns success if the device is not active */
|
|
int lv_resume_if_active(struct cmd_context *cmd, const char *lvid_s,
|
|
unsigned origin_only, unsigned exclusive)
|
|
{
|
|
return _lv_resume(cmd, lvid_s, origin_only, exclusive, 0);
|
|
}
|
|
|
|
int lv_resume(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only)
|
|
{
|
|
return _lv_resume(cmd, lvid_s, origin_only, 0, 1);
|
|
}
|
|
|
|
static int _lv_has_open_snapshots(struct logical_volume *lv)
|
|
{
|
|
struct lv_segment *snap_seg;
|
|
struct lvinfo info;
|
|
int r = 0;
|
|
|
|
dm_list_iterate_items_gen(snap_seg, &lv->snapshot_segs, origin_list) {
|
|
if (!lv_info(lv->vg->cmd, snap_seg->cow, 0, &info, 1, 0)) {
|
|
r = 1;
|
|
continue;
|
|
}
|
|
|
|
if (info.exists && info.open_count) {
|
|
log_error("LV %s/%s has open snapshot %s: "
|
|
"not deactivating", lv->vg->name, lv->name,
|
|
snap_seg->cow->name);
|
|
r = 1;
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int lv_deactivate(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
struct logical_volume *lv;
|
|
struct lvinfo info;
|
|
int r = 0;
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s, 0)))
|
|
goto out;
|
|
|
|
if (test_mode()) {
|
|
_skip("Deactivating '%s'.", lv->name);
|
|
r = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (!lv_info(cmd, lv, 0, &info, 1, 0))
|
|
goto_out;
|
|
|
|
if (!info.exists) {
|
|
r = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (lv_is_visible(lv)) {
|
|
if (info.open_count) {
|
|
log_error("LV %s/%s in use: not deactivating",
|
|
lv->vg->name, lv->name);
|
|
goto out;
|
|
}
|
|
if (lv_is_origin(lv) && _lv_has_open_snapshots(lv))
|
|
goto_out;
|
|
}
|
|
|
|
if (!lv_read_replicator_vgs(lv))
|
|
goto_out;
|
|
|
|
lv_calculate_readahead(lv, NULL);
|
|
|
|
if (!monitor_dev_for_events(cmd, lv, 0, 0))
|
|
stack;
|
|
|
|
critical_section_inc(cmd);
|
|
r = _lv_deactivate(lv);
|
|
critical_section_dec(cmd);
|
|
|
|
if (!lv_info(cmd, lv, 0, &info, 0, 0) || info.exists)
|
|
r = 0;
|
|
out:
|
|
if (lv) {
|
|
lv_release_replicator_vgs(lv);
|
|
free_vg(lv->vg);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Test if LV passes filter */
|
|
int lv_activation_filter(struct cmd_context *cmd, const char *lvid_s,
|
|
int *activate_lv)
|
|
{
|
|
struct logical_volume *lv;
|
|
int r = 0;
|
|
|
|
if (!activation()) {
|
|
*activate_lv = 1;
|
|
return 1;
|
|
}
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s, 0)))
|
|
goto out;
|
|
|
|
if (!_passes_activation_filter(cmd, lv)) {
|
|
log_verbose("Not activating %s/%s since it does not pass "
|
|
"activation filter.", lv->vg->name, lv->name);
|
|
*activate_lv = 0;
|
|
} else
|
|
*activate_lv = 1;
|
|
r = 1;
|
|
out:
|
|
if (lv)
|
|
free_vg(lv->vg);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int _lv_activate(struct cmd_context *cmd, const char *lvid_s,
|
|
int exclusive, int filter)
|
|
{
|
|
struct logical_volume *lv;
|
|
struct lvinfo info;
|
|
int r = 0;
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s, 0)))
|
|
goto out;
|
|
|
|
if (filter && !_passes_activation_filter(cmd, lv)) {
|
|
log_error("Not activating %s/%s since it does not pass "
|
|
"activation filter.", lv->vg->name, lv->name);
|
|
goto out;
|
|
}
|
|
|
|
if ((!lv->vg->cmd->partial_activation) && (lv->status & PARTIAL_LV)) {
|
|
log_error("Refusing activation of partial LV %s. Use --partial to override.",
|
|
lv->name);
|
|
goto_out;
|
|
}
|
|
|
|
if (lv_has_unknown_segments(lv)) {
|
|
log_error("Refusing activation of LV %s containing "
|
|
"an unrecognised segment.", lv->name);
|
|
goto_out;
|
|
}
|
|
|
|
if (test_mode()) {
|
|
_skip("Activating '%s'.", lv->name);
|
|
r = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (!lv_info(cmd, lv, 0, &info, 0, 0))
|
|
goto_out;
|
|
|
|
if (info.exists && !info.suspended && info.live_table) {
|
|
r = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (!lv_read_replicator_vgs(lv))
|
|
goto_out;
|
|
|
|
lv_calculate_readahead(lv, NULL);
|
|
|
|
if (exclusive)
|
|
lv->status |= ACTIVATE_EXCL;
|
|
|
|
critical_section_inc(cmd);
|
|
if (!(r = _lv_activate_lv(lv, 0)))
|
|
stack;
|
|
critical_section_dec(cmd);
|
|
|
|
if (r && !monitor_dev_for_events(cmd, lv, 0, 1))
|
|
stack;
|
|
|
|
out:
|
|
if (lv) {
|
|
lv_release_replicator_vgs(lv);
|
|
free_vg(lv->vg);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Activate LV */
|
|
int lv_activate(struct cmd_context *cmd, const char *lvid_s, int exclusive)
|
|
{
|
|
if (!_lv_activate(cmd, lvid_s, exclusive, 0))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Activate LV only if it passes filter */
|
|
int lv_activate_with_filter(struct cmd_context *cmd, const char *lvid_s, int exclusive)
|
|
{
|
|
if (!_lv_activate(cmd, lvid_s, exclusive, 1))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int lv_mknodes(struct cmd_context *cmd, const struct logical_volume *lv)
|
|
{
|
|
int r = 1;
|
|
|
|
if (!lv) {
|
|
r = dm_mknodes(NULL);
|
|
fs_unlock();
|
|
return r;
|
|
}
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
r = dev_manager_mknodes(lv);
|
|
|
|
fs_unlock();
|
|
|
|
return r;
|
|
}
|
|
|
|
/*
|
|
* Does PV use VG somewhere in its construction?
|
|
* Returns 1 on failure.
|
|
*/
|
|
int pv_uses_vg(struct physical_volume *pv,
|
|
struct volume_group *vg)
|
|
{
|
|
if (!activation())
|
|
return 0;
|
|
|
|
if (!dm_is_dm_major(MAJOR(pv->dev->dev)))
|
|
return 0;
|
|
|
|
return dev_manager_device_uses_vg(pv->dev, vg);
|
|
}
|
|
|
|
void activation_release(void)
|
|
{
|
|
dev_manager_release();
|
|
}
|
|
|
|
void activation_exit(void)
|
|
{
|
|
dev_manager_exit();
|
|
}
|
|
#endif
|