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305 lines
12 KiB
C
305 lines
12 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2018 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef LVM_ACTIVATE_H
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#define LVM_ACTIVATE_H
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#include "lib/metadata/metadata-exported.h"
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struct lvinfo {
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int exists;
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int suspended;
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unsigned int open_count;
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int major;
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int minor;
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int read_only;
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int live_table;
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int inactive_table;
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uint32_t read_ahead;
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};
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typedef enum {
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SEG_STATUS_NONE,
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SEG_STATUS_CACHE,
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SEG_STATUS_RAID,
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SEG_STATUS_SNAPSHOT,
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SEG_STATUS_THIN,
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SEG_STATUS_THIN_POOL,
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SEG_STATUS_VDO_POOL,
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SEG_STATUS_WRITECACHE,
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SEG_STATUS_INTEGRITY,
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SEG_STATUS_UNKNOWN
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} lv_seg_status_type_t;
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struct lv_seg_status {
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struct dm_pool *mem; /* input */
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const struct lv_segment *seg; /* input */
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lv_seg_status_type_t type; /* output */
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union {
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struct dm_status_cache *cache;
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struct dm_status_raid *raid;
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struct dm_status_snapshot *snapshot;
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struct dm_status_thin *thin;
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struct dm_status_thin_pool *thin_pool;
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struct dm_status_writecache *writecache;
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struct dm_status_integrity *integrity;
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struct lv_status_vdo vdo_pool;
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};
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};
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struct lv_with_info_and_seg_status {
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int info_ok;
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const struct logical_volume *lv; /* output */
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struct lvinfo info; /* output */
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int seg_part_of_lv; /* output */
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struct lv_seg_status seg_status; /* output, see lv_seg_status */
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/* TODO: add extra status for snapshot origin */
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};
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struct lv_activate_opts {
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int exclusive;
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int origin_only;
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int no_merging;
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int send_messages;
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int skip_in_use;
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unsigned revert;
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unsigned read_only;
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unsigned noscan; /* Mark this LV to avoid its scanning. This also
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directs udev to use proper udev flag to avoid
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any scanning in udev. This udev flag is automatically
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dropped in udev db on any spurious event that follows. */
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unsigned temporary; /* Mark this LV as temporary. It means, the LV
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* is created, used and deactivated within single
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* LVM command execution. Such LVs are mostly helper
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* LVs to do some action or cleanup before the proper
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* LV is created. This also directs udev to use proper
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* set of flags to avoid any scanning in udev. These udev
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* flags are persistent in udev db for any spurious event
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* that follows. */
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unsigned resuming; /* Set when resuming after a suspend. */
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const struct logical_volume *component_lv;
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};
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void set_activation(int activation, int silent);
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int activation(void);
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int driver_version(char *version, size_t size);
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int library_version(char *version, size_t size);
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int module_present(struct cmd_context *cmd, const char *target_name);
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int target_present_version(struct cmd_context *cmd, const char *target_name,
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int use_modprobe, uint32_t *maj,
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uint32_t *min, uint32_t *patchlevel);
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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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int target_version(const char *target_name, uint32_t *maj,
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uint32_t *min, uint32_t *patchlevel);
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int get_dm_active_devices(const struct volume_group *vg, struct dm_list **devs,
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unsigned *devs_features);
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int devno_dm_uuid(struct cmd_context *cmd, int major, int minor,
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char *uuid_buf, size_t uuid_buf_size);
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int dev_dm_uuid(struct cmd_context *cmd, struct device *dev,
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char *uuid_buf, size_t uuid_buf_size);
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int raid4_is_supported(struct cmd_context *cmd, const struct segment_type *segtype);
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int lvm_dm_prefix_check(int major, int minor, const char *prefix);
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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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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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void activation_release(void);
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void activation_exit(void);
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/* int lv_suspend(struct cmd_context *cmd, const char *lvid_s); */
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int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only, unsigned exclusive,
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const struct logical_volume *lv, const struct logical_volume *lv_pre);
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int lv_resume(struct cmd_context *cmd, const char *lvid_s, unsigned origin_only, const struct logical_volume *lv);
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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, unsigned revert, const struct logical_volume *lv);
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int lv_activate(struct cmd_context *cmd, const char *lvid_s, int exclusive,
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int noscan, int temporary, const struct logical_volume *lv);
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int lv_activate_with_filter(struct cmd_context *cmd, const char *lvid_s, int exclusive,
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int noscan, int temporary, const struct logical_volume *lv);
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int lv_deactivate(struct cmd_context *cmd, const char *lvid_s, const struct logical_volume *lv);
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int lv_mknodes(struct cmd_context *cmd, const struct logical_volume *lv);
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int lv_deactivate_any_missing_subdevs(const struct logical_volume *lv);
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int activate_lv(struct cmd_context *cmd, const struct logical_volume *lv);
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int deactivate_lv(struct cmd_context *cmd, const struct logical_volume *lv);
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int suspend_lv(struct cmd_context *cmd, const struct logical_volume *lv);
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int suspend_lv_origin(struct cmd_context *cmd, const struct logical_volume *lv);
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int resume_lv(struct cmd_context *cmd, const struct logical_volume *lv);
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int resume_lv_origin(struct cmd_context *cmd, const struct logical_volume *lv);
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int revert_lv(struct cmd_context *cmd, const struct logical_volume *lv);
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/*
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* Returns 1 if info structure has been populated, else 0 on failure.
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* When lvinfo* is NULL, it returns 1 if the device is locally active, 0 otherwise.
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*/
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int lv_info(struct cmd_context *cmd, const struct logical_volume *lv, int use_layer,
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struct lvinfo *info, int with_open_count, int with_read_ahead);
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int lv_info_with_name_check(struct cmd_context *cmd, const struct logical_volume *lv,
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int use_layer, struct lvinfo *info);
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/*
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* Returns 1 if lv_info_and_seg_status structure has been populated,
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* else 0 on failure or if device not active locally.
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*
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* lv_info_with_seg_status is the same as calling lv_info and then lv_status,
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* but this fn tries to do that with one ioctl if possible.
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*/
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int lv_info_with_seg_status(struct cmd_context *cmd,
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const struct lv_segment *lv_seg,
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struct lv_with_info_and_seg_status *status,
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int with_open_count, int with_read_ahead);
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int lv_check_not_in_use(const struct logical_volume *lv, int error_if_used);
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/*
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* Returns 1 if activate has been set: 1 = activate; 0 = don't.
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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, const struct logical_volume *lv);
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/*
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* Checks against the auto_activation_volume_list and
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* returns 1 if the LV should be activated, 0 otherwise.
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*/
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int lv_passes_auto_activation_filter(struct cmd_context *cmd, struct logical_volume *lv);
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int lv_check_transient(struct logical_volume *lv);
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/*
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* Returns 1 if percent has been set, else 0.
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*/
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int lv_snapshot_percent(const struct logical_volume *lv, dm_percent_t *percent);
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int lv_mirror_percent(struct cmd_context *cmd, const struct logical_volume *lv,
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int wait, dm_percent_t *percent, uint32_t *event_nr);
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int lv_raid_percent(const struct logical_volume *lv, dm_percent_t *percent);
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int lv_raid_dev_count(const struct logical_volume *lv, uint32_t *dev_cnt);
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int lv_raid_data_offset(const struct logical_volume *lv, uint64_t *data_offset);
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int lv_raid_dev_health(const struct logical_volume *lv, char **dev_health);
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int lv_raid_mismatch_count(const struct logical_volume *lv, uint64_t *cnt);
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int lv_raid_sync_action(const struct logical_volume *lv, char **sync_action);
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int lv_raid_message(const struct logical_volume *lv, const char *msg);
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int lv_raid_status(const struct logical_volume *lv, struct lv_status_raid **status);
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int lv_writecache_message(const struct logical_volume *lv, const char *msg);
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int lv_cache_status(const struct logical_volume *cache_lv,
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struct lv_status_cache **status);
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int lv_thin_device_id(const struct logical_volume *lv, uint32_t *device_id);
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int lv_thin_status(const struct logical_volume *lv, int flush,
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struct lv_status_thin **status);
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int lv_thin_pool_status(const struct logical_volume *lv, int flush,
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struct lv_status_thin_pool **status);
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int lv_vdo_pool_status(const struct logical_volume *lv, int flush,
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struct lv_status_vdo **status);
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int lv_vdo_pool_percent(const struct logical_volume *lv, dm_percent_t *percent);
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int lv_vdo_pool_size_config(const struct logical_volume *lv,
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struct vdo_pool_size_config *cfg);
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/*
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* Return number of LVs in the VG that are active.
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*/
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int lvs_in_vg_activated(const struct volume_group *vg);
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int lvs_in_vg_opened(const struct volume_group *vg);
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int lv_is_active(const struct logical_volume *lv);
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int lv_passes_readonly_filter(const struct logical_volume *lv);
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/* Check is any component LV is active */
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const struct logical_volume *lv_component_is_active(const struct logical_volume *lv);
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const struct logical_volume *lv_holder_is_active(const struct logical_volume *lv);
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int deactivate_lv_with_sub_lv(const struct logical_volume *lv);
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int lv_has_target_type(struct dm_pool *mem, const struct logical_volume *lv,
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const char *layer, const char *target_type);
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int monitor_dev_for_events(struct cmd_context *cmd, const struct logical_volume *lv,
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const struct lv_activate_opts *laopts, int monitor);
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#ifdef DMEVENTD
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# include "daemons/dmeventd/libdevmapper-event.h"
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char *get_monitor_dso_path(struct cmd_context *cmd, int id);
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int target_registered_with_dmeventd(struct cmd_context *cmd, const char *dso,
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const struct logical_volume *lv, int *pending, int *monitored);
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int target_register_events(struct cmd_context *cmd, const char *dso, const struct logical_volume *lv,
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int evmask __attribute__((unused)), int set, int timeout);
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#endif
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int add_linear_area_to_dtree(struct dm_tree_node *node, uint64_t size,
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uint32_t extent_size, int use_linear_target,
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const char *vgname, const char *lvname);
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/*
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* Returns 1 if PV has a dependency tree that uses anything in VG.
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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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struct dev_usable_check_params {
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unsigned int check_empty:1;
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unsigned int check_blocked:1;
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unsigned int check_suspended:1;
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unsigned int check_error_target:1;
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unsigned int check_reserved:1;
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unsigned int check_lv:1;
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};
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/*
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* Returns 1 if mapped device is not suspended, blocked or
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* is using a reserved name.
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*/
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int dm_device_is_usable(struct cmd_context *cmd, struct device *dev, struct dev_usable_check_params check, int *is_lv);
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/*
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* Declaration moved here from fs.h to keep header fs.h hidden
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*/
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void fs_unlock(void);
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#define TARGET_NAME_CACHE "cache"
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#define TARGET_NAME_WRITECACHE "writecache"
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#define TARGET_NAME_INTEGRITY "integrity"
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#define TARGET_NAME_ERROR "error"
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#define TARGET_NAME_ERROR_OLD "erro" /* Truncated in older kernels */
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#define TARGET_NAME_LINEAR "linear"
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#define TARGET_NAME_MIRROR "mirror"
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#define TARGET_NAME_RAID "raid"
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#define TARGET_NAME_SNAPSHOT "snapshot"
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#define TARGET_NAME_SNAPSHOT_MERGE "snapshot-merge"
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#define TARGET_NAME_SNAPSHOT_ORIGIN "snapshot-origin"
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#define TARGET_NAME_STRIPED "striped"
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#define TARGET_NAME_THIN "thin"
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#define TARGET_NAME_THIN_POOL "thin-pool"
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#define TARGET_NAME_VDO "vdo"
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#define TARGET_NAME_ZERO "zero"
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#define MODULE_NAME_CLUSTERED_MIRROR "clog"
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#define MODULE_NAME_CACHE TARGET_NAME_CACHE
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#define MODULE_NAME_WRITECACHE TARGET_NAME_WRITECACHE
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#define MODULE_NAME_INTEGRITY TARGET_NAME_INTEGRITY
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#define MODULE_NAME_ERROR TARGET_NAME_ERROR
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#define MODULE_NAME_LOG_CLUSTERED "log-clustered"
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#define MODULE_NAME_LOG_USERSPACE "log-userspace"
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#define MODULE_NAME_MIRROR TARGET_NAME_MIRROR
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#define MODULE_NAME_SNAPSHOT TARGET_NAME_SNAPSHOT
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#define MODULE_NAME_RAID TARGET_NAME_RAID
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#define MODULE_NAME_VDO "kvdo" /* does NOT use dm- prefix */
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#define MODULE_NAME_ZERO TARGET_NAME_ZERO
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#endif
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