shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2024-12-21 13:34:40 +03:00
Code Releases Activity

Use UUIDs instead of names while processing event handlers.

Browse Source 
Internally, we used DM names instead of UUIDs while processing event
handlers. This caused problems while trying to vgrename a VG with active LVs
where the names are being changed and so the devices were not found then.
The patch also contains a little bit of refactoring, moving "build_dlid" code
found in dev_manager.c to "build_dm_uuid", now in lvm-string.c (so we have
build_dm_uuid and build_dm_name at one place).
This commit is contained in:
Peter Rajnoha 2010-04-14 13:01:38 +00:00
parent cb296d5bb5
commit bda3982016
8 changed files with 66 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
WHATS_NEW
View File

@ -1,5 +1,6 @@
Version 2.02.63 -
================================
Use UUIDs instead of names while processing event handlers.
Only pass visible LVs to tools in cmdline VG name/tag expansions without -a.
Use typedefs for toollib process_each functions.
Use C locales and use_mlockall for clvmd.

2
daemons/dmeventd/libdevmapper-event.c
View File

@ -113,7 +113,7 @@ int dm_event_handler_set_uuid(struct dm_event_handler *dmevh, const char *uuid)
_dm_event_handler_clear_dev_info(dmevh);
dmevh->uuid = dm_strdup(uuid);
if (!dmevh->dev_name)
if (!dmevh->uuid)
return -ENOMEM;
return 0;
}

63
lib/activate/dev_manager.c
View File

@ -31,7 +31,6 @@
#include <dirent.h>
#define MAX_TARGET_PARAMSIZE 50000
#define UUID_PREFIX "LVM-"
typedef enum {
PRELOAD,
@ -59,32 +58,6 @@ struct lv_layer {
const char *old_name;
};
static char *_build_dlid(struct dm_pool *mem, const char *lvid, const char *layer)
{
char *dlid;
size_t len;
if (!layer)
layer = "";
len = sizeof(UUID_PREFIX) + sizeof(union lvid) + strlen(layer);
if (!(dlid = dm_pool_alloc(mem, len))) {
log_error("_build_dlid: pool allocation failed for %" PRIsize_t
" %s %s.", len, lvid, layer);
return NULL;
}
sprintf(dlid, UUID_PREFIX "%s%s%s", lvid, (*layer) ? "-" : "", layer);
return dlid;
}
char *build_dlid(struct dev_manager *dm, const char *lvid, const char *layer)
{
return _build_dlid(dm->mem, lvid, layer);
}
static int _read_only_lv(struct logical_volume *lv)
{
return (!(lv->vg->status & LVM_WRITE) || !(lv->status & LVM_WRITE));
@ -238,7 +211,7 @@ int dev_manager_info(struct dm_pool *mem, const struct logical_volume *lv,
return 0;
}
if (!(dlid = _build_dlid(mem, lv->lvid.s, NULL))) {
if (!(dlid = build_dm_uuid(mem, lv->lvid.s, NULL))) {
log_error("dlid build failed for %s", lv->name);
return 0;
}
@ -258,7 +231,7 @@ static const struct dm_info *_cached_info(struct dm_pool *mem,
struct dm_tree_node *dnode;
const struct dm_info *dinfo;
if (!(dlid = _build_dlid(mem, lv->lvid.s, NULL))) {
if (!(dlid = build_dm_uuid(mem, lv->lvid.s, NULL))) {
log_error("dlid build failed for %s", lv->name);
return NULL;
}
@ -370,7 +343,7 @@ static int _lv_has_target_type(struct dev_manager *dm,
char *type = NULL;
char *params = NULL;
if (!(dlid = build_dlid(dm, lv->lvid.s, layer)))
if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, layer)))
return_0;
if (!(dmt = _setup_task(NULL, dlid, 0,
@ -631,7 +604,7 @@ int dev_manager_snapshot_percent(struct dev_manager *dm,
if (!(name = build_dm_name(dm->mem, lv->vg->name, lv->name, NULL)))
return_0;
if (!(dlid = build_dlid(dm, lv->lvid.s, NULL)))
if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, NULL)))
return_0;
/*
@ -667,7 +640,7 @@ int dev_manager_mirror_percent(struct dev_manager *dm,
/* FIXME dm_pool_free ? */
if (!(dlid = build_dlid(dm, lv->lvid.s, suffix))) {
if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, suffix))) {
log_error("dlid build failed for %s", lv->name);
return 0;
}
@ -790,7 +763,7 @@ static int _add_dev_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
if (!(name = build_dm_name(dm->mem, lv->vg->name, lv->name, layer)))
return_0;
if (!(dlid = build_dlid(dm, lv->lvid.s, layer)))
if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, layer)))
return_0;
log_debug("Getting device info for %s [%s]", name, dlid);
@ -925,7 +898,7 @@ static char *_add_error_device(struct dev_manager *dm, struct dm_tree *dtree,
sprintf(errid, "missing_%d_%d", segno, s);
if (!(id = build_dlid(dm, seg->lv->lvid.s, errid)))
if (!(id = build_dm_uuid(dm->mem, seg->lv->lvid.s, errid)))
return_NULL;
if (!(name = build_dm_name(dm->mem, seg->lv->vg->name,
@ -987,9 +960,9 @@ int add_areas_line(struct dev_manager *dm, struct lv_segment *seg,
(seg_pv(seg, s)->pe_start +
(extent_size * seg_pe(seg, s))));
else if (seg_type(seg, s) == AREA_LV) {
if (!(dlid = build_dlid(dm,
seg_lv(seg, s)->lvid.s,
NULL)))
if (!(dlid = build_dm_uuid(dm->mem,
seg_lv(seg, s)->lvid.s,
NULL)))
return_0;
dm_tree_node_add_target_area(node, NULL, dlid,
extent_size * seg_le(seg, s));
@ -1009,7 +982,7 @@ static int _add_origin_target_to_dtree(struct dev_manager *dm,
{
const char *real_dlid;
if (!(real_dlid = build_dlid(dm, lv->lvid.s, "real")))
if (!(real_dlid = build_dm_uuid(dm->mem, lv->lvid.s, "real")))
return_0;
if (!dm_tree_node_add_snapshot_origin_target(dnode, lv->size, real_dlid))
@ -1025,13 +998,13 @@ static int _add_snapshot_merge_target_to_dtree(struct dev_manager *dm,
const char *origin_dlid, *cow_dlid, *merge_dlid;
struct lv_segment *merging_cow_seg = find_merging_cow(lv);
if (!(origin_dlid = build_dlid(dm, lv->lvid.s, "real")))
if (!(origin_dlid = build_dm_uuid(dm->mem, lv->lvid.s, "real")))
return_0;
if (!(cow_dlid = build_dlid(dm, merging_cow_seg->cow->lvid.s, "cow")))
if (!(cow_dlid = build_dm_uuid(dm->mem, merging_cow_seg->cow->lvid.s, "cow")))
return_0;
if (!(merge_dlid = build_dlid(dm, merging_cow_seg->cow->lvid.s, NULL)))
if (!(merge_dlid = build_dm_uuid(dm->mem, merging_cow_seg->cow->lvid.s, NULL)))
return_0;
if (!dm_tree_node_add_snapshot_merge_target(dnode, lv->size, origin_dlid,
@ -1056,10 +1029,10 @@ static int _add_snapshot_target_to_dtree(struct dev_manager *dm,
return 0;
}
if (!(origin_dlid = build_dlid(dm, snap_seg->origin->lvid.s, "real")))
if (!(origin_dlid = build_dm_uuid(dm->mem, snap_seg->origin->lvid.s, "real")))
return_0;
if (!(cow_dlid = build_dlid(dm, snap_seg->cow->lvid.s, "cow")))
if (!(cow_dlid = build_dm_uuid(dm->mem, snap_seg->cow->lvid.s, "cow")))
return_0;
size = (uint64_t) snap_seg->len * snap_seg->origin->vg->extent_size;
@ -1218,7 +1191,7 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
if (!(name = build_dm_name(dm->mem, lv->vg->name, lv->name, layer)))
return_0;
if (!(dlid = build_dlid(dm, lv->lvid.s, layer)))
if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, layer)))
return_0;
/* We've already processed this node if it already has a context ptr */
@ -1421,7 +1394,7 @@ static int _tree_action(struct dev_manager *dm, struct logical_volume *lv, actio
goto out;
}
if (!(dlid = build_dlid(dm, lv->lvid.s, NULL)))
if (!(dlid = build_dm_uuid(dm->mem, lv->lvid.s, NULL)))
goto_out;
/* Only process nodes with uuid of "LVM-" plus VG id. */

2
lib/activate/targets.h
View File

@ -29,6 +29,4 @@ int add_areas_line(struct dev_manager *dm, struct lv_segment *seg,
int build_dev_string(struct dev_manager *dm, char *dlid, char *devbuf,
size_t bufsize, const char *desc);
char *build_dlid(struct dev_manager *dm, const char *lvid, const char *layer);
#endif

26
lib/mirror/mirrored.c
View File

@ -239,7 +239,7 @@ static int _mirrored_target_percent(void **target_state,
return 1;
}
static int _add_log(struct dev_manager *dm, struct lv_segment *seg,
static int _add_log(struct dm_pool *mem, struct lv_segment *seg,
struct dm_tree_node *node, uint32_t area_count, uint32_t region_size)
{
unsigned clustered = 0;
@ -256,14 +256,14 @@ static int _add_log(struct dev_manager *dm, struct lv_segment *seg,
if (seg->log_lv) {
/* If disk log, use its UUID */
if (!(log_dlid = build_dlid(dm, seg->log_lv->lvid.s, NULL))) {
if (!(log_dlid = build_dm_uuid(mem, seg->log_lv->lvid.s, NULL))) {
log_error("Failed to build uuid for log LV %s.",
seg->log_lv->name);
return 0;
}
} else {
/* If core log, use mirror's UUID and set DM_CORELOG flag */
if (!(log_dlid = build_dlid(dm, seg->lv->lvid.s, NULL))) {
if (!(log_dlid = build_dm_uuid(mem, seg->lv->lvid.s, NULL))) {
log_error("Failed to build uuid for mirror LV %s.",
seg->lv->name);
return 0;
@ -342,7 +342,7 @@ static int _mirrored_add_target_line(struct dev_manager *dm, struct dm_pool *mem
if (!dm_tree_node_add_mirror_target(node, len))
return_0;
if ((r = _add_log(dm, seg, node, area_count, region_size)) <= 0) {
if ((r = _add_log(mem, seg, node, area_count, region_size)) <= 0) {
stack;
return r;
}
@ -422,7 +422,7 @@ static int _get_mirror_dso_path(struct cmd_context *cmd, char **dso)
return 1;
}
static struct dm_event_handler *_create_dm_event_handler(const char *dmname,
static struct dm_event_handler *_create_dm_event_handler(const char *dmuuid,
const char *dso,
enum dm_event_mask mask)
{
@ -434,7 +434,7 @@ static struct dm_event_handler *_create_dm_event_handler(const char *dmname,
if (dm_event_handler_set_dso(dmevh, dso))
goto fail;
if (dm_event_handler_set_dev_name(dmevh, dmname))
if (dm_event_handler_set_uuid(dmevh, dmuuid))
goto fail;
dm_event_handler_set_event_mask(dmevh, mask);
@ -447,7 +447,7 @@ fail:
static int _target_monitored(struct lv_segment *seg, int *pending)
{
char *dso, *name;
char *dso, *uuid;
struct logical_volume *lv;
struct volume_group *vg;
enum dm_event_mask evmask = 0;
@ -460,10 +460,10 @@ static int _target_monitored(struct lv_segment *seg, int *pending)
if (!_get_mirror_dso_path(vg->cmd, &dso))
return_0;
if (!(name = build_dm_name(vg->cmd->mem, vg->name, lv->name, NULL)))
if (!(uuid = build_dm_uuid(vg->cmd->mem, lv->lvid.s, NULL)))
return_0;
if (!(dmevh = _create_dm_event_handler(name, dso, DM_EVENT_ALL_ERRORS)))
if (!(dmevh = _create_dm_event_handler(uuid, dso, DM_EVENT_ALL_ERRORS)))
return_0;
if (dm_event_get_registered_device(dmevh, 0)) {
@ -486,7 +486,7 @@ static int _target_monitored(struct lv_segment *seg, int *pending)
static int _target_set_events(struct lv_segment *seg,
int evmask __attribute((unused)), int set)
{
char *dso, *name;
char *dso, *uuid;
struct logical_volume *lv;
struct volume_group *vg;
struct dm_event_handler *dmevh;
@ -498,10 +498,10 @@ static int _target_set_events(struct lv_segment *seg,
if (!_get_mirror_dso_path(vg->cmd, &dso))
return_0;
if (!(name = build_dm_name(vg->cmd->mem, vg->name, lv->name, NULL)))
if (!(uuid = build_dm_uuid(vg->cmd->mem, lv->lvid.s, NULL)))
return_0;
if (!(dmevh = _create_dm_event_handler(name, dso, DM_EVENT_ALL_ERRORS)))
if (!(dmevh = _create_dm_event_handler(uuid, dso, DM_EVENT_ALL_ERRORS)))
return_0;
r = set ? dm_event_register_handler(dmevh) : dm_event_unregister_handler(dmevh);
@ -509,7 +509,7 @@ static int _target_set_events(struct lv_segment *seg,
if (!r)
return_0;
log_info("%s %s for events", set ? "Monitored" : "Unmonitored", name);
log_info("%s %s for events", set ? "Monitored" : "Unmonitored", uuid);
return 1;
}

21
lib/misc/lvm-string.c
View File

@ -170,6 +170,27 @@ char *build_dm_name(struct dm_pool *mem, const char *vgname,
return r;
}
char *build_dm_uuid(struct dm_pool *mem, const char *lvid, const char *layer)
{
char *dmuuid;
size_t len;
if (!layer)
layer = "";
len = sizeof(UUID_PREFIX) + strlen(lvid) + strlen(layer) + 1;
if (!(dmuuid = dm_pool_alloc(mem, len))) {
log_error("build_dm_name: Allocation failed for %" PRIsize_t
" %s %s.", len, lvid, layer);
return NULL;
}
sprintf(dmuuid, UUID_PREFIX "%s%s%s", lvid, (*layer) ? "-" : "", layer);
return dmuuid;
}
/*
* Copies a string, quoting double quotes with backslashes.
*/

3
lib/misc/lvm-string.h
View File

@ -20,6 +20,7 @@
#include <stdarg.h>
#define NAME_LEN 128
#define UUID_PREFIX "LVM-"
struct pool;
@ -28,6 +29,8 @@ int emit_to_buffer(char **buffer, size_t *size, const char *fmt, ...)
char *build_dm_name(struct dm_pool *mem, const char *vg,
const char *lv, const char *layer);
char *build_dm_uuid(struct dm_pool *mem, const char *lvid,
const char *layer);
int validate_name(const char *n);

18
lib/snapshot/snapshot.c
View File

@ -185,7 +185,7 @@ static int _get_snapshot_dso_path(struct cmd_context *cmd, char **dso)
return 1;
}
static struct dm_event_handler *_create_dm_event_handler(const char *dmname,
static struct dm_event_handler *_create_dm_event_handler(const char *dmuuid,
const char *dso,
const int timeout,
enum dm_event_mask mask)
@ -198,7 +198,7 @@ static struct dm_event_handler *_create_dm_event_handler(const char *dmname,
if (dm_event_handler_set_dso(dmevh, dso))
goto fail;
if (dm_event_handler_set_dev_name(dmevh, dmname))
if (dm_event_handler_set_uuid(dmevh, dmuuid))
goto fail;
dm_event_handler_set_timeout(dmevh, timeout);
@ -212,7 +212,7 @@ fail:
static int _target_registered(struct lv_segment *seg, int *pending)
{
char *dso, *name;
char *dso, *uuid;
struct logical_volume *lv;
struct volume_group *vg;
enum dm_event_mask evmask = 0;
@ -225,10 +225,10 @@ static int _target_registered(struct lv_segment *seg, int *pending)
if (!_get_snapshot_dso_path(vg->cmd, &dso))
return_0;
if (!(name = build_dm_name(vg->cmd->mem, vg->name, seg->cow->name, NULL)))
if (!(uuid = build_dm_uuid(vg->cmd->mem, seg->cow->lvid.s, NULL)))
return_0;
if (!(dmevh = _create_dm_event_handler(name, dso, 0, DM_EVENT_ALL_ERRORS)))
if (!(dmevh = _create_dm_event_handler(uuid, dso, 0, DM_EVENT_ALL_ERRORS)))
return_0;
if (dm_event_get_registered_device(dmevh, 0)) {
@ -251,7 +251,7 @@ static int _target_registered(struct lv_segment *seg, int *pending)
static int _target_set_events(struct lv_segment *seg,
int events __attribute((unused)), int set)
{
char *dso, *name;
char *dso, *uuid;
struct volume_group *vg = seg->lv->vg;
struct dm_event_handler *dmevh;
int r;
@ -259,11 +259,11 @@ static int _target_set_events(struct lv_segment *seg,
if (!_get_snapshot_dso_path(vg->cmd, &dso))
return_0;
if (!(name = build_dm_name(vg->cmd->mem, vg->name, seg->cow->name, NULL)))
if (!(uuid = build_dm_uuid(vg->cmd->mem, seg->cow->lvid.s, NULL)))
return_0;
/* FIXME: make timeout configurable */
if (!(dmevh = _create_dm_event_handler(name, dso, 10,
if (!(dmevh = _create_dm_event_handler(uuid, dso, 10,
DM_EVENT_ALL_ERRORS|DM_EVENT_TIMEOUT)))
return_0;
@ -272,7 +272,7 @@ static int _target_set_events(struct lv_segment *seg,
if (!r)
return_0;
log_info("%s %s for events", set ? "Registered" : "Unregistered", name);
log_info("%s %s for events", set ? "Registered" : "Unregistered", uuid);
return 1;
}