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Code Releases Activity

o Removed old files

Browse Source 
o  rewrote activate.c to use dev-manager, I'm sure these two will merge
   at some point.

o  Rename is broken ATM

o  dev-manager puts the calls through to fs.c for layers that have the
   'visible' flag set.
This commit is contained in:
Joe Thornber 2002-02-26 11:49:17 +00:00
parent c15334eb4e
commit de6c918392
10 changed files with 179 additions and 687 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

254
lib/activate/activate.c
View File

@ -6,14 +6,13 @@
#include "metadata.h"
#include "activate.h"
#include "ll-activate.h"
#include "display.h"
#include "log.h"
#include "fs.h"
#include "lvm-string.h"
#include "names.h"
#include "pool.h"
#include "toolcontext.h"
#include "dev_manager.h"
#include <limits.h>
#include <linux/kdev_t.h>
@ -47,25 +46,31 @@ int driver_version(char *version, size_t size)
r = 1;
out:
out:
dm_task_destroy(dmt);
return r;
}
static int _query(struct logical_volume *lv, int (*fn)(const char *))
/*
* Returns 1 if info structure populated, else 0 on failure.
*/
int lv_info(struct logical_volume *lv, struct dm_info *info)
{
char buffer[128];
int r;
struct dev_manager *dm;
if (!build_dm_name(buffer, sizeof(buffer), "",
lv->vg->name, lv->name)) {
if (!(dm = dev_manager_create(lv->vg->name))) {
stack;
return -1;
return 0;
}
return fn(buffer);
}
if (!(r = dev_manager_info(dm, lv, info)))
stack;
dev_manager_destroy(dm);
return r;
}
/*
* These three functions return the number of LVs in the state,
@ -73,236 +78,94 @@ static int _query(struct logical_volume *lv, int (*fn)(const char *))
*/
int lv_active(struct logical_volume *lv)
{
return _query(lv, device_active);
struct dm_info info;
if (!lv_info(lv, &info)) {
stack;
return -1;
}
return info.exists;
}
int lv_suspended(struct logical_volume *lv)
{
return _query(lv, device_suspended);
struct dm_info info;
if (!lv_info(lv, &info)) {
stack;
return -1;
}
return info.suspended;
}
int lv_open_count(struct logical_volume *lv)
{
return _query(lv, device_open_count);
}
struct dm_info info;
/*
* Returns 1 if info structure populated, else 0 on failure.
*/
int lv_info(struct logical_volume *lv, struct dm_info *info)
{
char buffer[128];
if (!build_dm_name(buffer, sizeof(buffer), "",
lv->vg->name, lv->name)) {
if (!lv_info(lv, &info)) {
stack;
return 0;
return -1;
}
return device_info(buffer, info);
}
static inline int _read_only_lv(struct logical_volume *lv)
{
return (lv->status & LVM_WRITE) && (lv->vg->status & LVM_WRITE);
}
int _lv_activate_named(struct logical_volume *lv, const char *name)
{
int r = 0;
struct dm_task *dmt;
if (test_mode()) {
_skip("Activation of '%s'.", lv->name);
return 0;
}
/*
* Create a task.
*/
if (!(dmt = setup_dm_task(name, DM_DEVICE_CREATE))) {
stack;
return 0;
}
/*
* Populate it.
*/
if (!device_populate_lv(dmt, lv)) {
stack;
return 0;
}
/*
* Do we want a specific minor number ?
*/
if (lv->minor >= 0) {
if (!dm_task_set_minor(dmt, MINOR(lv->minor))) {
log_error("Failed to set minor number for %s to %d "
"during activation.", lv->name, lv->minor);
goto out;
} else
log_very_verbose("Set minor number for %s to %d.",
lv->name, lv->minor);
}
/*
* Read only ?
*/
if (!_read_only_lv(lv)) {
if (!dm_task_set_ro(dmt)) {
log_error("Failed to set %s read-only during "
"activation.", lv->name);
goto out;
} else
log_very_verbose("Activating %s read-only", lv->name);
}
/*
* Load this into the kernel.
*/
if (!(r = dm_task_run(dmt))) {
log_err("Activation failed.");
goto out;
}
out:
dm_task_destroy(dmt);
log_verbose("Logical volume %s%s activated", lv->name,
r == 1 ? "" : " not");
return r;
return info.open_count;
}
int lv_activate(struct logical_volume *lv)
{
char buffer[128];
int r;
struct dev_manager *dm;
/*
* Decide what we're going to call this device.
*/
if (!build_dm_name(buffer, sizeof(buffer), "",
lv->vg->name, lv->name)) {
if (!(dm = dev_manager_create(lv->vg->name))) {
stack;
return 0;
}
if (!_lv_activate_named(lv, buffer) ||
!fs_add_lv(lv, lv->minor)) {
stack;
return 0;
}
return 1;
}
static int _reload(const char *name, struct logical_volume *lv)
{
int r = 0;
struct dm_task *dmt;
/*
* Create a task.
*/
if (!(dmt = setup_dm_task(name, DM_DEVICE_RELOAD))) {
stack;
return 0;
}
/*
* Populate it.
*/
if (!device_populate_lv(dmt, lv)) {
stack;
return 0;
}
/*
* Load this into the kernel.
*/
if (!(r = dm_task_run(dmt))) {
log_err("Activation failed.");
goto out;
}
/*
* Create device nodes and symbolic links.
*/
if (!fs_add_lv(lv, lv->minor))
if (!(r = dev_manager_activate(dm, lv)))
stack;
out:
dm_task_destroy(dmt);
log_verbose("Logical volume %s%s re-activated", lv->name,
r == 1 ? "" : " not");
dev_manager_destroy(dm);
return r;
}
int lv_reactivate(struct logical_volume *lv)
{
int r;
char buffer[128];
struct dev_manager *dm;
if (test_mode()) {
_skip("Reactivation of '%s'.", lv->name);
return 0;
}
/*
* Decide what we're going to call this device.
*/
if (!build_dm_name(buffer, sizeof(buffer), "",
lv->vg->name, lv->name)) {
if (!(dm = dev_manager_create(lv->vg->name))) {
stack;
return 0;
}
/*
* Suspend the device if it isn't already.
*/
if (!device_suspended(buffer) && !device_suspend(buffer)) {
if (!(r = dev_manager_reactivate(dm, lv)))
stack;
return 0;
}
r = _reload(buffer, lv);
if (!device_resume(buffer)) {
stack;
return 0;
}
dev_manager_destroy(dm);
return r;
}
int lv_deactivate(struct logical_volume *lv)
{
char buffer[128];
int r;
struct dev_manager *dm;
log_very_verbose("Deactivating %s", lv->name);
if (test_mode()) {
_skip("Deactivating '%s'.", lv->name);
return 0;
}
if (!build_dm_name(buffer, sizeof(buffer), "",
lv->vg->name, lv->name)) {
if (!(dm = dev_manager_create(lv->vg->name))) {
stack;
return 0;
}
if (!device_deactivate(buffer)) {
if (!(r = dev_manager_deactivate(dm, lv)))
stack;
return 0;
}
fs_del_lv(lv);
return 1;
dev_manager_destroy(dm);
return r;
}
int lv_suspend(struct logical_volume *lv)
{
#if 0
char buffer[128];
log_very_verbose("Suspending %s", lv->name);
@ -325,10 +188,15 @@ int lv_suspend(struct logical_volume *lv)
fs_del_lv(lv);
return 1;
#else
log_err("lv_suspend not implemented.");
return 1;
#endif
}
int lv_rename(const char *old_name, struct logical_volume *lv)
{
#if 0
int r = 0;
char new_name[PATH_MAX];
struct dm_task *dmt;
@ -366,6 +234,10 @@ int lv_rename(const char *old_name, struct logical_volume *lv)
end:
dm_task_destroy(dmt);
return r;
#else
log_err("lv_rename not implemented yet.");
return 1;
#endif
}
/*
@ -374,6 +246,7 @@ int lv_rename(const char *old_name, struct logical_volume *lv)
*/
int lv_setup_cow_store(struct logical_volume *lv)
{
#if 0
char buffer[128];
char path[PATH_MAX];
struct device *dev;
@ -412,6 +285,9 @@ int lv_setup_cow_store(struct logical_volume *lv)
dev_close(dev);
return 1;
#else
return 0;
#endif
}
@ -472,7 +348,7 @@ int lvs_in_vg_opened(struct volume_group *vg)
}
/* FIXME Currently lvid is "vgname/lv_uuid". Needs to be vg_uuid/lv_uuid. */
static struct logical_volume *_lv_from_lvid(struct cmd_context *cmd,
static struct logical_volume *_lv_from_lvid(struct cmd_context *cmd,
const char *lvid)
{
struct lv_list *lvl;

125
lib/activate/dev_manager.c
View File

@ -9,6 +9,7 @@
#include "hash.h"
#include "log.h"
#include "lvm-string.h"
#include "fs.h"
#include <libdevmapper.h>
@ -22,6 +23,7 @@ enum {
struct dev_layer {
char *name;
int mark;
int visible;
/*
* Setup the dm_task.
@ -99,10 +101,9 @@ static char *_build_name(struct pool *mem, const char *vg,
}
out = r;
_quote_colons(&out, vg);
_quote_colons(&out, lv);
_quote_colons(&out, layer);
*out = '\0';
_quote_colons(&out, vg); *out++ = ':';
_quote_colons(&out, lv); *out++ = ':';
_quote_colons(&out, layer); *out = '\0';
return r;
}
@ -148,6 +149,9 @@ static int _load(struct dev_layer *dl, int task)
log_err("Couldn't create device '%s'.", dl->name);
dm_task_destroy(dmt);
if (dl->visible)
fs_add_lv(dl->lv, dl->name);
return r;
}
@ -166,6 +170,10 @@ static int _remove(struct dev_layer *dl)
log_err("Couldn't remove device '%s'", dl->name);
dm_task_destroy(dmt);
if (dl->visible)
fs_del_lv(dl->lv);
return r;
}
@ -194,7 +202,13 @@ static int _suspend(struct dev_layer *dl)
if (dl->info.suspended)
return 1;
return _suspend_or_resume(dl->name, 1);
if (!_suspend_or_resume(dl->name, 1)) {
stack;
return 0;
}
dl->info.suspended = 1;
return 1;
}
static int _resume(struct dev_layer *dl)
@ -202,7 +216,13 @@ static int _resume(struct dev_layer *dl)
if (!dl->info.suspended)
return 1;
return _suspend_or_resume(dl->name, 0);
if (!_suspend_or_resume(dl->name, 0)) {
stack;
return 0;
}
dl->info.suspended = 0;
return 1;
}
static int _info(const char *name, struct dm_info *info)
@ -465,6 +485,8 @@ _create_layer(struct pool *mem, const char *layer,
dl->type = type;
dl->lv = lv;
list_init(&dl->pre_create);
list_init(&dl->pre_active);
return dl;
}
@ -526,6 +548,7 @@ static int _expand_lv(struct dev_manager *dm, struct logical_volume *lv)
return 0;
}
dl->populate = _populate_vanilla;
dl->visible = 1;
if (!hash_insert(dm->layers, dl->name, dl)) {
stack;
@ -664,7 +687,7 @@ int _remove_rec(struct dev_manager *dm, struct dev_layer *dl)
}
}
if (dl->info.exists && !_remove(dl)) {
if (dl->info.exists && (!_resume(dl) || !_remove(dl))) {
stack;
return 0;
}
@ -703,40 +726,6 @@ static int _mark_dependants(struct dev_manager *dm)
return 1;
}
/*
* The guts of the activation unit, this examines the device
* layers in the manager, and tries to issue the correct
* instructions to activate them in order.
*/
static int _execute(struct dev_manager *dm,
int (*cmd)(struct dev_manager *dm, struct dev_layer *dl))
{
struct hash_node *hn;
struct dev_layer *dl;
/*
* We need to make a list of top level devices, ie. those
* that have no entries in 'pre_create'.
*/
if (!_mark_dependants(dm)) {
stack;
return 0;
}
/*
* Now only top level devices will be unmarked.
*/
hash_iterate (hn, dm->layers) {
dl = hash_get_data(dm->layers, hn);
if (!dl->mark)
cmd(dm, dl);
}
return 1;
}
/*
* Remove all layers from the hash table that do not have their
* mark flag set.
@ -786,14 +775,50 @@ static int _select_lv(struct dev_manager *dm, struct logical_volume *lv)
_prune_unmarked(dm);
return 1;
}
int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv)
/*
* The guts of the activation unit, this examines the device
* layers in the manager, and tries to issue the correct
* instructions to activate them in order.
*/
static int _execute(struct dev_manager *dm, struct logical_volume *lv,
int (*cmd)(struct dev_manager *dm, struct dev_layer *dl))
{
struct hash_node *hn;
struct dev_layer *dl;
if (!_select_lv(dm, lv)) {
stack;
return 0;
}
if (!_execute(dm, _create_rec)) {
/*
* We need to make a list of top level devices, ie. those
* that have no entries in 'pre_create'.
*/
if (!_mark_dependants(dm)) {
stack;
return 0;
}
/*
* Now only top level devices will be unmarked.
*/
hash_iterate (hn, dm->layers) {
dl = hash_get_data(dm->layers, hn);
if (!dl->mark)
cmd(dm, dl);
}
return 1;
}
int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv)
{
if (!_execute(dm, lv, _create_rec)) {
stack;
return 0;
}
@ -803,12 +828,7 @@ int dev_manager_activate(struct dev_manager *dm, struct logical_volume *lv)
int dev_manager_reactivate(struct dev_manager *dm, struct logical_volume *lv)
{
if (!_select_lv(dm, lv)) {
stack;
return 0;
}
if (!_execute(dm, _create_rec)) {
if (!_execute(dm, lv, _create_rec)) {
stack;
return 0;
}
@ -818,12 +838,7 @@ int dev_manager_reactivate(struct dev_manager *dm, struct logical_volume *lv)
int dev_manager_deactivate(struct dev_manager *dm, struct logical_volume *lv)
{
if (!_select_lv(dm, lv)) {
stack;
return 0;
}
if (!_execute(dm, _remove_rec)) {
if (!_execute(dm, lv, _remove_rec)) {
stack;
return 0;
}

84
lib/activate/fs.c
View File

@ -6,8 +6,8 @@
#include "fs.h"
#include "log.h"
#include "names.h"
#include "toolcontext.h"
#include "lvm-string.h"
#include <sys/types.h>
#include <sys/stat.h>
@ -29,9 +29,10 @@ static int _mk_dir(struct volume_group *vg)
{
char vg_path[PATH_MAX];
if (!build_vg_path(vg_path, sizeof(vg_path),
vg->cmd->dev_dir, vg->name)) {
log_error("Couldn't construct name of volume group directory.");
if (lvm_snprintf(vg_path, sizeof(vg_path), "%s/%s",
vg->cmd->dev_dir, vg->name) == -1) {
log_error("Couldn't construct name of volume "
"group directory.");
return 0;
}
@ -45,10 +46,10 @@ static int _rm_dir(struct volume_group *vg)
{
char vg_path[PATH_MAX];
if (!build_vg_path(vg_path, sizeof(vg_path),
vg->cmd->dev_dir, vg->name)) {
log_error("Couldn't construct name of volume group dir for %s",
vg->name);
if (lvm_snprintf(vg_path, sizeof(vg_path), "%s/%s",
vg->cmd->dev_dir, vg->name) == -1) {
log_error("Couldn't construct name of volume "
"group directory.");
return 0;
}
@ -58,41 +59,41 @@ static int _rm_dir(struct volume_group *vg)
return 1;
}
static int _mk_link(struct logical_volume *lv)
static int _mk_link(struct logical_volume *lv, const char *dev)
{
char lv_path[PATH_MAX], link_path[PATH_MAX];
struct stat buf;
if (!build_dm_path(lv_path, sizeof(lv_path), "",
lv->vg->name, lv->name)) {
log_error("Couldn't create destination pathname for "
"logical volume link for %s", lv->name);
return 0;
}
if (!build_lv_link_path(link_path, sizeof(link_path),
lv->vg->cmd->dev_dir,
lv->vg->name, lv->name)) {
if (lvm_snprintf(lv_path, sizeof(lv_path), "%s/%s/%s",
lv->vg->cmd->dev_dir, lv->vg->name, lv->name) == -1) {
log_error("Couldn't create source pathname for "
"logical volume link %s", lv->name);
return 0;
}
if (!lstat(link_path, &buf)) {
if (lvm_snprintf(link_path, sizeof(link_path), "%s/%s",
dm_dir(), dev) == -1) {
log_error("Couldn't create destination pathname for "
"logical volume link for %s", lv->name);
return 0;
}
if (!lstat(lv_path, &buf)) {
if (!S_ISLNK(buf.st_mode)) {
log_error("Symbolic link %s not created: file exists",
link_path);
return 0;
}
if (unlink(link_path) < 0) {
log_sys_error("unlink", link_path);
if (unlink(lv_path) < 0) {
log_sys_error("unlink", lv_path);
return 0;
}
}
log_very_verbose("Linking %s to %s", link_path, lv_path);
if (symlink(lv_path, link_path) < 0) {
log_sys_error("symlink", link_path);
if (symlink(link_path, lv_path) < 0) {
log_sys_error("symlink", lv_path);
return 0;
}
@ -102,36 +103,32 @@ static int _mk_link(struct logical_volume *lv)
static int _rm_link(struct logical_volume *lv, const char *lv_name)
{
struct stat buf;
char link_path[PATH_MAX];
char lv_path[PATH_MAX];
if (!lv_name)
lv_name = lv->name;
if (!build_lv_link_path(link_path, sizeof(link_path),
lv->vg->cmd->dev_dir,
lv->vg->name, lv->name)) {
if (lvm_snprintf(lv_path, sizeof(lv_path), "%s/%s/%s",
lv->vg->cmd->dev_dir, lv->vg->name, lv_name) == -1) {
log_error("Couldn't determine link pathname.");
return 0;
}
log_very_verbose("Removing link %s", link_path);
if (lstat(link_path, &buf) || !S_ISLNK(buf.st_mode)) {
log_error("%s not symbolic link - not removing",
link_path);
return 0;
log_very_verbose("Removing link %s", lv_path);
if (lstat(lv_path, &buf) || !S_ISLNK(buf.st_mode)) {
log_error("%s not symbolic link - not removing", lv_path);
return 0;
}
if (unlink(link_path) < 0) {
log_sys_error("unlink", link_path);
if (unlink(lv_path) < 0) {
log_sys_error("unlink", lv_path);
return 0;
}
return 1;
}
int fs_add_lv(struct logical_volume *lv, int minor)
int fs_add_lv(struct logical_volume *lv, const char *dev)
{
if (!_mk_dir(lv->vg) ||
!_mk_link(lv)) {
!_mk_link(lv, dev)) {
stack;
return 0;
}
@ -141,7 +138,7 @@ int fs_add_lv(struct logical_volume *lv, int minor)
int fs_del_lv(struct logical_volume *lv)
{
if (!_rm_link(lv, NULL) ||
if (!_rm_link(lv, lv->name) ||
!_rm_dir(lv->vg)) {
stack;
return 0;
@ -150,12 +147,13 @@ int fs_del_lv(struct logical_volume *lv)
return 1;
}
int fs_rename_lv(const char *old_name, struct logical_volume *lv)
int fs_rename_lv(struct logical_volume *lv,
const char *dev, const char *old_name)
{
if (!_rm_link(lv, old_name))
stack;
if (!_mk_link(lv))
if (!_mk_link(lv, dev))
stack;
return 1;

6
lib/activate/fs.h
View File

@ -14,10 +14,10 @@
* up the volume group directory in /dev and the
* symbolic links to the dm device.
*/
int fs_add_lv(struct logical_volume *lv, int minor);
int fs_add_lv(struct logical_volume *lv, const char *dev);
int fs_del_lv(struct logical_volume *lv);
int fs_rename_lv(const char *old_name, struct logical_volume *lv);
int fs_rename_lv(struct logical_volume *lv,
const char *dev, const char *old_name);
#endif

143
lib/activate/ll-activate.c
View File

@ -1,143 +0,0 @@
/*
* Copyright (C) 2002 Sistina Software (UK) Limited.
*
* This file is released under the LGPL.
*/
#include "ll-activate.h"
#include "log.h"
struct dm_task *setup_dm_task(const char *name, int task)
{
struct dm_task *dmt;
if (!(dmt = dm_task_create(task))) {
stack;
return NULL;
}
dm_task_set_name(dmt, name);
return dmt;
}
int device_info(const char *name, struct dm_info *info)
{
int r = 0;
struct dm_task *dmt;
log_very_verbose("Getting device info for %s", name);
if (!(dmt = setup_dm_task(name, DM_DEVICE_INFO))) {
stack;
return 0;
}
if (!dm_task_run(dmt)) {
stack;
goto out;
}
if (!dm_task_get_info(dmt, info)) {
stack;
goto out;
}
r = 1;
out:
dm_task_destroy(dmt);
return r;
}
/*
* The next three functions return -1 on error.
*/
int device_active(const char *name)
{
struct dm_info info;
if (!device_info(name, &info)) {
stack;
return -1;
}
log_very_verbose("%s is%s active", name, info.exists ? "" : " not");
return info.exists;
}
int device_suspended(const char *name)
{
struct dm_info info;
if (!device_info(name, &info)) {
stack;
return -1;
}
log_very_verbose("%s is%s suspended", name,
info.suspended ? "" : " not");
return info.suspended;
}
int device_open_count(const char *name)
{
struct dm_info info;
if (!device_info(name, &info)) {
stack;
return -1;
}
log_very_verbose("%s is open %d time(s)", name, info.open_count);
return info.open_count;
}
int device_deactivate(const char *name)
{
int r;
struct dm_task *dmt;
log_very_verbose("Deactivating '%s'.", name);
if (!(dmt = setup_dm_task(name, DM_DEVICE_REMOVE))) {
stack;
return 0;
}
if (!(r = dm_task_run(dmt)))
stack;
dm_task_destroy(dmt);
return r;
}
static int _suspend(const char *name, int sus)
{
int r;
struct dm_task *dmt;
int task = sus ? DM_DEVICE_SUSPEND : DM_DEVICE_RESUME;
log_very_verbose("%s %s", sus ? "Suspending" : "Resuming", name);
if (!(dmt = setup_dm_task(name, task))) {
stack;
return 0;
}
if (!(r = dm_task_run(dmt)))
log_err("Couldn't %s device '%s'", sus ? "suspend" : "resume",
name);
dm_task_destroy(dmt);
return r;
}
int device_suspend(const char *name)
{
return _suspend(name, 1);
}
int device_resume(const char *name)
{
return _suspend(name, 0);
}

62
lib/activate/ll-activate.h
View File

@ -1,62 +0,0 @@
/*
* Copyright (C) 2002 Sistina Software (UK) Limited.
*
* This file is released under the LGPL.
*/
#ifndef _LVM_LL_ACTIVATE_H
#define _LVM_LL_ACTIVATE_H
#include "metadata.h"
#include <libdevmapper.h>
/*
* Prepares a new dm_task.
*/
struct dm_task *setup_dm_task(const char *name, int task);
/*
* Query functions. 'name' is the device node name in the
* device-mapper dir.
*/
int device_info(const char *name, struct dm_info *info);
int device_active(const char *name);
int device_suspended(const char *name);
int device_open_count(const char *name);
/*
* Functions to manipulate an already active device.
*/
int device_deactivate(const char *name);
int device_suspend(const char *name);
int device_resume(const char *name);
/*
* The next three functions populate a dm_task with a suitable
* set of targets.
*/
/*
* Creates a device with a mapping table as specified by the lv.
*/
int device_populate_lv(struct dm_task *dmt, struct logical_volume *lv);
/*
* Layers the origin device above an already active 'real'
* device.
*/
int device_populate_origin(struct dm_task *dmt, struct logical_volume *lv,
const char *real);
/*
* Creates a snapshot device for a given origin and exception
* storage area.
*/
int device_populate_snapshot(struct dm_task *dmt, struct logical_volume *lv,
const char *origin, const char *cow_device);
#endif

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lib/activate/names.c
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/*
* Copyright (C) 2002 Sistina Software (UK) Limited.
*
* This file is released under the LGPL.
*/
#include "names.h"
#include "lvm-string.h"
#include "log.h"
#include "limits.h"
#include <libdevmapper.h>
/*
* The volume group name and the logical volume name are
* seperated by a single ':', any colons in the vg name are
* doubled up to form a pair.
*/
int build_dm_name(char *buffer, size_t len, const char *prefix,
const char *vg_name, const char *lv_name)
{
char *out;
const char *in;
for (out = buffer, in = vg_name; len && *in; len--) {
if (*in == ':') {
*out++ = ':';
if (!--len)
break;
}
*out++ = *in++;
len--;
}
if (!len)
return 0;
if (lvm_snprintf(out, len, ":%s%s", prefix, lv_name) == -1) {
log_err("Couldn't build logical volume name.");
return 0;
}
return 1;
}
int build_dm_path(char *buffer, size_t len, const char *prefix,
const char *vg_name, const char *lv_name)
{
char dev_name[PATH_MAX];
if (!build_dm_name(dev_name, sizeof(dev_name),
prefix, vg_name, lv_name)) {
stack;
return 0;
}
if (lvm_snprintf(buffer, len, "%s/%s", dm_dir(), dev_name) == -1) {
stack;
return 0;
}
return 1;
}
int build_vg_path(char *buffer, size_t len,
const char *dev_dir, const char *vg_name)
{
if (lvm_snprintf(buffer, len, "%s%s", dev_dir, vg_name) == -1) {
stack;
return 0;
}
return 1;
}
int build_lv_link_path(char *buffer, size_t len, const char *dev_dir,
const char *vg_name, const char *lv_name)
{
if (lvm_snprintf(buffer, len, "%s%s/%s",
dev_dir, vg_name, lv_name) == -1) {
stack;
return 0;
}
return 1;
}

50
lib/activate/names.h
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/*
* Copyright (C) 2002 Sistina Software (UK) Limited.
*
* This file is released under the LGPL.
*/
#ifndef _LVM_NAMES_H
#define _LVM_NAMES_H
#include <stdlib.h>
/*
* Functions that build up useful paths to devices, sym-links
* etc. Names are passed in as strings, rather than via the
* appropriate metadata structures, so we can use it for renaming
* devices.
*/
/*
* The name of the device-mapper device for a particular LV.
* eg, vg0:music
*/
int build_dm_name(char *buffer, size_t len, const char *prefix,
const char *vg_name, const char *lv_name);
/*
* The path of the device-mapper device for a particular LV.
* eg, /dev/device-mapper/vg0:music
*/
int build_dm_path(char *buffer, size_t len, const char *prefix,
const char *vg_name, const char *lv_name);
/*
* Path to the volume group directory.
* eg, /dev/vg0
*/
int build_vg_path(char *buffer, size_t len,
const char *dev_dir, const char *vg_name);
/*
* Path to the symbolic link that lives in the volume group
* directory.
* eg, /dev/vg0/music
*/
int build_lv_link_path(char *buffer, size_t len,
const char *dev_dir,
const char *vg_name, const char *lv_name);
#endif

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lib/activate/table-build.c
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/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the LGPL.
*/
#include "table-build.c"
static void _print_run(FILE *fp, struct logical_volume *lv)
{
}
int build_table(struct volume_group *vg, struct logical_volume *lv,
const char *file)
{
int i;
uint64_t sector = 0;
uint64_t pe_size = vg->extent_size;
uint64_t dest;
struct pe_specifier *pes;
FILE *fp = fopen(file, "w");
if (!fp) {
log_err("couldn't open '%s' to write table", file);
return 0;
}
for (i = 0; i < lv->le_count; i++) {
pes = lv->map + i;
dest = pes->pv->pe_start + (pe_size * pes->pe);
fprintf(fp, "%ull %ull linear %s %ull\n",
sector, pe_size, pes->pv->dev->name, dest);
sector += pe_size;
}
fclose(fp);
return 1;
}

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lib/activate/table-build.h
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/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the GPL.
*/
#ifndef TABLE_BUILD_H
#define TABLE_BUILD_H
int build_table(struct volume_group *vg, struct logical_volume *lv,
const char *file);
#endif