mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-27 07:22:49 +03:00
684 lines
12 KiB
C
684 lines
12 KiB
C
/*
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* Copyright (C) 2001 Sistina Software (UK) Limited.
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*
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* This file is released under the LGPL.
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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-string.h"
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#include "pool.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 <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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#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 lv_info(const struct logical_volume *lv, struct lvinfo *info)
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{
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return 0;
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}
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int lv_snapshot_percent(struct logical_volume *lv, float *percent)
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{
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return 0;
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}
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int lv_mirror_percent(struct logical_volume *lv, int wait, float *percent,
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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(struct volume_group *vg)
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{
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return 0;
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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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int lv_suspend_if_active(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_resume(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_resume_if_active(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_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)
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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)
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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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void activation_exit(void)
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{
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return;
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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_verbose("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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struct config_node *cn;
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struct config_value *cv;
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char *str;
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char path[PATH_MAX];
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if (!(cn = find_config_node(cmd->cft->root, "activation/volume_list"))) {
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/* If no hosts tags defined, activate */
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if (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) ||
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str_list_match_list(&cmd->tags, &lv->vg->tags))
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return 1;
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/* Don't activate */
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return 0;
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}
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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)
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|| str_list_match_list(&cmd->tags,
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&lv->vg->tags))
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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 (!index(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 (lvm_snprintf(path, sizeof(path), "%s/%s", lv->vg->name,
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lv->name) < 0) {
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log_error("lvm_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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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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if (!dm_get_library_version(version, size))
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return 0;
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return 1;
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}
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int driver_version(char *version, size_t size)
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{
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int r = 0;
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struct dm_task *dmt;
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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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if (!(dmt = dm_task_create(DM_DEVICE_VERSION))) {
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stack;
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return 0;
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}
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if (!dm_task_run(dmt))
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log_error("Failed to get driver version");
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if (!dm_task_get_driver_version(dmt, version, size))
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goto out;
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r = 1;
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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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/*
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* Returns 1 if info structure populated, else 0 on failure.
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*/
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static int _lv_info(const struct logical_volume *lv, int mknodes,
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struct lvinfo *info)
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{
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int r;
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struct dev_manager *dm;
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struct dm_info dminfo;
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if (!activation())
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return 0;
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if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
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stack;
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return 0;
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}
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if (!(r = dev_manager_info(dm, lv, mknodes, &dminfo)))
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stack;
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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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dev_manager_destroy(dm);
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return r;
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}
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int lv_info(const struct logical_volume *lv, struct lvinfo *info)
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{
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return _lv_info(lv, 0, info);
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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_snapshot_percent(struct logical_volume *lv, float *percent)
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{
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int r;
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struct dev_manager *dm;
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if (!activation())
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return 0;
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if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
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stack;
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return 0;
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}
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if (!(r = dev_manager_snapshot_percent(dm, lv, percent)))
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stack;
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dev_manager_destroy(dm);
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return r;
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}
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/* FIXME Merge with snapshot_percent */
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int lv_mirror_percent(struct logical_volume *lv, int wait, float *percent,
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uint32_t *event_nr)
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{
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int r;
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struct dev_manager *dm;
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if (!activation())
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return 0;
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if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
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stack;
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return 0;
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}
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if (!(r = dev_manager_mirror_percent(dm, lv, wait, percent, event_nr)))
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stack;
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dev_manager_destroy(dm);
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return r;
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}
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static int _lv_active(struct logical_volume *lv)
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{
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struct lvinfo info;
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if (!lv_info(lv, &info)) {
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stack;
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return -1;
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}
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return info.exists;
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}
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static int _lv_open_count(struct logical_volume *lv)
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{
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struct lvinfo info;
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if (!lv_info(lv, &info)) {
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stack;
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return -1;
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}
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return info.open_count;
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}
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/* FIXME Need to detect and handle an lv rename */
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static int _lv_activate_lv(struct logical_volume *lv)
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{
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int r;
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struct dev_manager *dm;
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if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
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stack;
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return 0;
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}
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if (!(r = dev_manager_activate(dm, lv)))
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stack;
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dev_manager_destroy(dm);
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return r;
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}
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static int _lv_deactivate(struct logical_volume *lv)
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{
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int r;
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struct dev_manager *dm;
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if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
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stack;
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return 0;
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}
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if (!(r = dev_manager_deactivate(dm, lv)))
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stack;
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dev_manager_destroy(dm);
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return r;
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}
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static int _lv_suspend_lv(struct logical_volume *lv)
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{
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int r;
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struct dev_manager *dm;
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if (!(dm = dev_manager_create(lv->vg->name, lv->vg->cmd->cft))) {
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stack;
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return 0;
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}
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if (!(r = dev_manager_suspend(dm, lv)))
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stack;
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dev_manager_destroy(dm);
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return r;
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}
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/*
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* These two functions return the number of LVs in the state,
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* or -1 on error.
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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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struct list *lvh;
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struct logical_volume *lv;
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int count = 0;
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if (!activation())
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return 0;
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list_iterate(lvh, &vg->lvs) {
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lv = list_item(lvh, struct lv_list)->lv;
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count += (_lv_active(lv) == 1);
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}
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return count;
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}
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int lvs_in_vg_opened(struct volume_group *vg)
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{
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struct list *lvh;
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struct logical_volume *lv;
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int count = 0;
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if (!activation())
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return 0;
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list_iterate(lvh, &vg->lvs) {
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lv = list_item(lvh, struct lv_list)->lv;
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count += (_lv_open_count(lv) == 1);
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}
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return count;
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}
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static int _lv_suspend(struct cmd_context *cmd, const char *lvid_s,
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int error_if_not_suspended)
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{
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struct logical_volume *lv;
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struct lvinfo info;
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if (!activation())
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return 1;
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if (!(lv = lv_from_lvid(cmd, lvid_s)))
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return 0;
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if (test_mode()) {
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_skip("Suspending '%s'.", lv->name);
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return 1;
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}
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if (!lv_info(lv, &info)) {
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stack;
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return 0;
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}
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if (!info.exists || info.suspended)
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return error_if_not_suspended ? 0 : 1;
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memlock_inc();
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if (!_lv_suspend_lv(lv)) {
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memlock_dec();
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fs_unlock();
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return 0;
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}
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return 1;
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}
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/* Returns success if the device is not active */
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int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s)
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{
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return _lv_suspend(cmd, lvid_s, 0);
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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 _lv_suspend(cmd, lvid_s, 1);
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}
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static int _lv_resume(struct cmd_context *cmd, const char *lvid_s,
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int error_if_not_active)
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{
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struct logical_volume *lv;
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struct lvinfo info;
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if (!activation())
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return 1;
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if (!(lv = lv_from_lvid(cmd, lvid_s)))
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return 0;
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if (test_mode()) {
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_skip("Resuming '%s'.", lv->name);
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return 1;
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}
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if (!lv_info(lv, &info)) {
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stack;
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return 0;
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}
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if (!info.exists || !info.suspended)
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return error_if_not_active ? 0 : 1;
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if (!_lv_activate_lv(lv))
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return 0;
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memlock_dec();
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fs_unlock();
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return 1;
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}
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/* Returns success if the device is not active */
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int lv_resume_if_active(struct cmd_context *cmd, const char *lvid_s)
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{
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return _lv_resume(cmd, lvid_s, 0);
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}
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int lv_resume(struct cmd_context *cmd, const char *lvid_s)
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{
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return _lv_resume(cmd, lvid_s, 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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struct logical_volume *lv;
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struct lvinfo info;
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int r;
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if (!activation())
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return 1;
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if (!(lv = lv_from_lvid(cmd, lvid_s)))
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return 0;
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if (test_mode()) {
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_skip("Deactivating '%s'.", lv->name);
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return 1;
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}
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if (!lv_info(lv, &info)) {
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stack;
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return 0;
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}
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if (!info.exists)
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return 1;
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if (info.open_count) {
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log_error("LV %s/%s in use: not removing", lv->vg->name,
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lv->name);
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return 0;
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}
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memlock_inc();
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r = _lv_deactivate(lv);
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memlock_dec();
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fs_unlock();
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return r;
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}
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/* Test if LV passes filter */
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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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struct logical_volume *lv;
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if (!activation())
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goto activate;
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if (!(lv = lv_from_lvid(cmd, lvid_s)))
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return 0;
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if (!_passes_activation_filter(cmd, lv)) {
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log_verbose("Not activating %s/%s due to config file settings",
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lv->vg->name, lv->name);
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*activate_lv = 0;
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return 1;
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}
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activate:
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*activate_lv = 1;
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return 1;
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}
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static int _lv_activate(struct cmd_context *cmd, const char *lvid_s, int filter)
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{
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struct logical_volume *lv;
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struct lvinfo info;
|
|
int r;
|
|
|
|
if (!activation())
|
|
return 1;
|
|
|
|
if (!(lv = lv_from_lvid(cmd, lvid_s)))
|
|
return 0;
|
|
|
|
if (filter && !_passes_activation_filter(cmd, lv)) {
|
|
log_verbose("Not activating %s/%s due to config file settings",
|
|
lv->vg->name, lv->name);
|
|
return 0;
|
|
}
|
|
|
|
if (test_mode()) {
|
|
_skip("Activating '%s'.", lv->name);
|
|
return 1;
|
|
}
|
|
|
|
if (!lv_info(lv, &info)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (info.exists && !info.suspended)
|
|
return 1;
|
|
|
|
memlock_inc();
|
|
r = _lv_activate_lv(lv);
|
|
memlock_dec();
|
|
fs_unlock();
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Activate LV */
|
|
int lv_activate(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return _lv_activate(cmd, lvid_s, 0);
|
|
}
|
|
|
|
/* Activate LV only if it passes filter */
|
|
int lv_activate_with_filter(struct cmd_context *cmd, const char *lvid_s)
|
|
{
|
|
return _lv_activate(cmd, lvid_s, 1);
|
|
}
|
|
|
|
int lv_mknodes(struct cmd_context *cmd, const struct logical_volume *lv)
|
|
{
|
|
struct lvinfo info;
|
|
int r = 1;
|
|
|
|
if (!_lv_info(lv, 1, &info)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
|
|
if (info.exists)
|
|
r = dev_manager_mknodes(lv);
|
|
else
|
|
r = dev_manager_rmnodes(lv);
|
|
|
|
fs_unlock();
|
|
|
|
return r;
|
|
}
|
|
|
|
void activation_exit(void)
|
|
{
|
|
dev_manager_exit();
|
|
}
|
|
#endif
|