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Merge lvreduce & lvextend into lvresize.

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This commit is contained in:
Alasdair Kergon 2001-11-13 14:17:50 +00:00
parent d53f88d7af
commit 03a8a07d67
11 changed files with 355 additions and 398 deletions
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2
lib/device/dev-cache.c
View File

@ -237,7 +237,7 @@ static int _insert(const char *path, int rec)
} else { /* add a device */ } else { /* add a device */
if (!S_ISBLK(info.st_mode)) { if (!S_ISBLK(info.st_mode)) {
//log_debug("%s: Not a block device", path); log_debug("%s: Not a block device", path);
return 0; return 0;
} }

23
lib/metadata/lv_manip.c
View File

@ -227,8 +227,7 @@ struct logical_volume *lv_create(const char *name,
lv->size = extents * vg->extent_size; lv->size = extents * vg->extent_size;
lv->le_count = extents; lv->le_count = extents;
if (!(lv->map = pool_zalloc(cmd->mem, if (!(lv->map = pool_zalloc(cmd->mem, sizeof(*lv->map) * extents))) {
sizeof(*lv->map) * extents))) {
stack; stack;
goto bad; goto bad;
} }
@ -256,21 +255,16 @@ struct logical_volume *lv_create(const char *name,
int lv_reduce(struct logical_volume *lv, uint32_t extents) int lv_reduce(struct logical_volume *lv, uint32_t extents)
{ {
// FIXME: merge with Alasdair's version in tools int i;
if (extents % lv->stripes) {
log_error("For a striped volume you must reduce by a " extents = lv->le_count - extents;
"multiple of the number of stripes");
return 0; for (i = extents; i < lv->le_count; i++) {
lv->map[i].pv->pe_allocated--;
} }
if (lv->le_count <= extents) { lv->le_count = extents;
log_error("Attempt to reduce by so many extents there would "
"be nothing left of the logical volume.");
return 0;
}
/* Hmmm ... I think all we need to do is ... */
lv->le_count -= extents;
return 1; return 1;
} }
@ -323,7 +317,6 @@ int lv_extend(struct logical_volume *lv, uint32_t extents,
return 0; return 0;
} }
/* FIXME: I don't like the way the lvh is passed in here - EJT */
int lv_remove(struct volume_group *vg, struct list *lvh) int lv_remove(struct volume_group *vg, struct list *lvh)
{ {
int i; int i;

1
lib/metadata/metadata.h
View File

@ -134,6 +134,7 @@ struct cmd_context {
/* misc. vars needed by format handler */ /* misc. vars needed by format handler */
char *dev_dir; char *dev_dir;
struct dev_filter *filter; struct dev_filter *filter;
struct config_file *cf;
}; };
struct format_instance { struct format_instance {

5
make.tmpl.in
View File

@ -53,12 +53,15 @@ SUFFIXES=.c .d .o
CFLAGS+=-Wall CFLAGS+=-Wall
#CFLAGS+=-O2 #CFLAGS+=-O2
CFLAGS+=-g -fno-omit-frame-pointer CFLAGS+=-g -fno-omit-frame-pointer
#CFLAGS+=-pg #CFLAGS+=-pg
#LD_FLAGS=-pg
CFLAGS+=-DDEBUG_MEM -DDEBUG CFLAGS+=-DDEBUG_MEM -DDEBUG
#CFLAGS+=-DBOUNDS_CHECK #CFLAGS+=-DBOUNDS_CHECK
INCLUDES+=-I. -I$(top_srcdir)/include INCLUDES+=-I. -I$(top_srcdir)/include
INC_LNS=$(top_srcdir)/include/.symlinks_created INC_LNS=$(top_srcdir)/include/.symlinks_created
LD_FLAGS=-pg
ifeq ("@READLINE@", "yes") ifeq ("@READLINE@", "yes")
CFLAGS += -DREADLINE_SUPPORT CFLAGS += -DREADLINE_SUPPORT

1
tools/Makefile.in
View File

@ -29,6 +29,7 @@ SOURCES=\
lvmchange.c \ lvmchange.c \
lvreduce.c \ lvreduce.c \
lvremove.c \ lvremove.c \
lvresize.c \
lvscan.c \ lvscan.c \
pvchange.c \ pvchange.c \
pvcreate.c \ pvcreate.c \

13
tools/commands.h
View File

@ -199,6 +199,19 @@ xx(lvrename,
autobackup_ARG) autobackup_ARG)
xx(lvresize,
"Resize a logical volume",
"lvresize\n"
"\t[-A/--autobackup y/n]\n"
"\t[-d/--debug]\n"
"\t[-h/-?/--help]\n"
"\t{-l/--extents [+/-]LogicalExtentsNumber |\n"
"\t -L/--size [+/-]LogicalVolumeSize[kKmMgGtT]}\n"
"\t[-v/--verbose]\n"
"\tLogicalVolume[Path] [ PhysicalVolumePath... ]\n",
autobackup_ARG, extents_ARG, size_ARG)
xx(lvscan, xx(lvscan,
"List all logical volumes in all volume groups", "List all logical volumes in all volume groups",
"lvscan " "lvscan "

164
tools/lvextend.c
View File

@ -22,167 +22,5 @@
int lvextend(int argc, char **argv) int lvextend(int argc, char **argv)
{ {
struct volume_group *vg; return lvresize(argc, argv);
struct logical_volume *lv;
uint32_t extents = 0;
uint32_t size = 0;
sign_t sign = SIGN_NONE;
char *lv_name, *vg_name;
char *st;
char *dummy;
struct list *lvh, *pvh, *pvl;
int opt = 0;
if (arg_count(extents_ARG) + arg_count(size_ARG) != 1) {
log_error("Please specify either size or extents (not both)");
return EINVALID_CMD_LINE;
}
if (arg_count(extents_ARG)) {
extents = arg_int_value(extents_ARG, 0);
sign = arg_sign_value(extents_ARG, SIGN_NONE);
}
if (arg_count(size_ARG)) {
size = arg_int_value(size_ARG, 0);
sign = arg_sign_value(extents_ARG, SIGN_NONE);
}
if (sign == SIGN_MINUS) {
log_error("Negative argument not permitted - use lvreduce");
return EINVALID_CMD_LINE;
}
if (!argc) {
log_error("Please provide the logical volume name");
return EINVALID_CMD_LINE;
}
lv_name = argv[0];
argv++;
argc--;
if (!(vg_name = extract_vgname(fid, lv_name))) {
log_error("Please provide a volume group name");
return EINVALID_CMD_LINE;
}
if ((st = strrchr(lv_name, '/')))
lv_name = st + 1;
/* does VG exist? */
log_verbose("Finding volume group %s", vg_name);
if (!(vg = fid->ops->vg_read(fid, vg_name))) {
log_error("Volume group %s doesn't exist", vg_name);
return ECMD_FAILED;
}
if (!(vg->status & ACTIVE)) {
log_error("Volume group %s must be active before changing a "
"logical volume", vg_name);
return ECMD_FAILED;
}
/* does LV exist? */
if (!(lvh = find_lv_in_vg(vg, lv_name))) {
log_error("Logical volume %s not found in volume group %s",
lv_name, vg_name);
return ECMD_FAILED;
}
lv = &list_item(lvh, struct lv_list)->lv;
if (!(lv->status & ACTIVE)) {
log_error("Logical volume %s must be active before change",
lv_name);
return ECMD_FAILED;
}
if (argc) {
/* Build up list of PVs */
if (!(pvh = pool_alloc(fid->cmd->mem, sizeof (struct list)))) {
log_error("pvh list allocation failed");
return ECMD_FAILED;
}
list_init(pvh);
for (; opt < argc; opt++) {
if (!(pvl = find_pv_in_vg(vg, argv[opt]))) {
log_error("Physical Volume %s not found in "
"Volume Group %s", argv[opt],
vg->name);
return EINVALID_CMD_LINE;
}
if (list_item(pvl, struct pv_list)->pv.pe_count ==
list_item(pvl, struct pv_list)->pv.pe_allocated) {
log_error("No free extents on physical volume"
" %s", argv[opt]);
continue;
/* FIXME Buy check not empty at end! */
}
list_add(pvh, pvl);
}
} else {
/* Use full list from VG */
pvh = &vg->pvs;
}
if (size) {
/* No of 512-byte sectors */
extents = size * 2;
if (extents % vg->extent_size) {
char *s1;
extents += vg->extent_size -
(extents % vg->extent_size);
log_print("Rounding up size to full physical extent %s",
(s1 = display_size(extents / 2, SIZE_SHORT)));
dbg_free(s1);
}
extents /= vg->extent_size;
}
if (sign == SIGN_PLUS)
extents += lv->le_count;
if (extents <= lv->le_count) {
log_error("New size given (%d extents) not larger than "
"existing size (%d extents)", extents, lv->le_count);
return EINVALID_CMD_LINE;
}
if (!extents) {
log_error("New size of 0 not permitted");
return EINVALID_CMD_LINE;
}
log_print("Extending logical volume %s to %s", lv_name,
(dummy =
display_size(extents * vg->extent_size / 2, SIZE_SHORT)));
dbg_free(dummy);
lv_extend(lv, extents - lv->le_count, pvh);
/* where parm is always *increase* not actual */
/********* FIXME Suspend lv ***********/
/* store vg on disk(s) */
if (!fid->ops->vg_write(fid, vg))
return ECMD_FAILED;
/* FIXME Ensure it always displays errors? */
if (!lv_reactivate(lv))
return ECMD_FAILED;
/********* FIXME Resume *********/
/********* FIXME Backup
if ((ret = do_autobackup(vg_name, vg)))
return ret;
************/
log_print("Logical volume %s successfully extended", lv_name);
return 0;
} }

61
tools/lvm.c
View File

@ -35,7 +35,7 @@
#include <readline/history.h> #include <readline/history.h>
#endif #endif
/* define the table of valid switches */ /* define exported table of valid switches */
struct arg the_args[ARG_COUNT + 1] = { struct arg the_args[ARG_COUNT + 1] = {
#define xx(a, b, c, d) {b, "--" c, d, 0, NULL}, #define xx(a, b, c, d) {b, "--" c, d, 0, NULL},
@ -44,17 +44,6 @@ struct arg the_args[ARG_COUNT + 1] = {
}; };
/* a register of the lvm commands */
struct command {
const char *name;
const char *desc;
const char *usage;
command_fn fn;
int num_args;
int *valid_args;
};
static int _array_size; static int _array_size;
static int _num_commands; static int _num_commands;
static struct command *_commands; static struct command *_commands;
@ -62,11 +51,13 @@ static struct command *_commands;
/* Exported LVM1 disk format */ /* Exported LVM1 disk format */
struct format_instance *fid; struct format_instance *fid;
/* Export command being processed */
struct command *the_command;
struct cmd_context *cmd; struct cmd_context *cmd;
/* Whether or not to dump persistent filter state */ /* Whether or not to dump persistent filter state */
static int dump_filter; static int dump_filter;
static struct config_file *_cf;
static int _interactive; static int _interactive;
static FILE *_log; static FILE *_log;
@ -544,20 +535,19 @@ static void display_help()
static int run_command(int argc, char **argv) static int run_command(int argc, char **argv)
{ {
int ret = 0; int ret = 0;
struct command *com;
if (!(com = find_command(argv[0]))) if (!(the_command = find_command(argv[0])))
return ENO_SUCH_CMD; return ENO_SUCH_CMD;
if (!process_command_line(com, &argc, &argv)) { if (!process_command_line(the_command, &argc, &argv)) {
log_error("Error during parsing of command line."); log_error("Error during parsing of command line.");
return EINVALID_CMD_LINE; return EINVALID_CMD_LINE;
} }
if ((ret = process_common_commands(com))) if ((ret = process_common_commands(the_command)))
return ret; return ret;
ret = com->fn(argc, argv); ret = the_command->fn(argc, argv);
/* /*
* free off any memory the command used. * free off any memory the command used.
@ -565,7 +555,7 @@ static int run_command(int argc, char **argv)
pool_empty(cmd->mem); pool_empty(cmd->mem);
if (ret == EINVALID_CMD_LINE && !_interactive) if (ret == EINVALID_CMD_LINE && !_interactive)
usage(com->name); usage(the_command->name);
return ret; return ret;
} }
@ -598,11 +588,6 @@ static int split(char *str, int *argc, char **argv, int max)
return *argc; return *argc;
} }
struct config_file *active_config_file(void)
{
return _cf;
}
static void __init_log(struct config_file *cf) static void __init_log(struct config_file *cf)
{ {
char *open_mode = "a"; char *open_mode = "a";
@ -628,7 +613,7 @@ static void __init_log(struct config_file *cf)
init_verbose(verbose_level); init_verbose(verbose_level);
} }
static int dev_cache_setup(void) static int dev_cache_setup(struct config_file *cf)
{ {
struct config_node *cn; struct config_node *cn;
struct config_value *cv; struct config_value *cv;
@ -638,7 +623,7 @@ static int dev_cache_setup(void)
return 0; return 0;
} }
if (!(cn = find_config_node(_cf->root, "devices/scan", '/'))) { if (!(cn = find_config_node(cf->root, "devices/scan", '/'))) {
if (!dev_cache_add_dir("/dev")) { if (!dev_cache_add_dir("/dev")) {
log_error("Failed to add /dev to internal " log_error("Failed to add /dev to internal "
"device cache"); "device cache");
@ -666,7 +651,7 @@ static int dev_cache_setup(void)
return 1; return 1;
} }
static struct dev_filter *filter_components_setup(void) static struct dev_filter *filter_components_setup(struct config_file *cf)
{ {
struct config_node *cn; struct config_node *cn;
struct dev_filter *f1, *f2, *f3; struct dev_filter *f1, *f2, *f3;
@ -674,7 +659,7 @@ static struct dev_filter *filter_components_setup(void)
if (!(f2 = lvm_type_filter_create())) if (!(f2 = lvm_type_filter_create()))
return 0; return 0;
if (!(cn = find_config_node(_cf->root, "devices/filter", '/'))) { if (!(cn = find_config_node(cf->root, "devices/filter", '/'))) {
log_debug("devices/filter not found in config file: no regex " log_debug("devices/filter not found in config file: no regex "
"filter installed"); "filter installed");
return f2; return f2;
@ -693,7 +678,7 @@ static struct dev_filter *filter_components_setup(void)
return f3; return f3;
} }
static struct dev_filter *filter_setup(void) static struct dev_filter *filter_setup(struct config_file *cf)
{ {
const char *lvm_cache; const char *lvm_cache;
struct dev_filter *f3, *f4; struct dev_filter *f3, *f4;
@ -701,10 +686,10 @@ static struct dev_filter *filter_setup(void)
dump_filter = 0; dump_filter = 0;
if (!(f3 = filter_components_setup())) if (!(f3 = filter_components_setup(cmd->cf)))
return 0; return 0;
lvm_cache = find_config_str(_cf->root, "devices/cache", '/', lvm_cache = find_config_str(cf->root, "devices/cache", '/',
"/etc/lvm/.cache"); "/etc/lvm/.cache");
if (!(f4 = persistent_filter_create(f3, lvm_cache))) { if (!(f4 = persistent_filter_create(f3, lvm_cache))) {
@ -713,7 +698,7 @@ static struct dev_filter *filter_setup(void)
} }
/* Should we ever dump persistent filter state? */ /* Should we ever dump persistent filter state? */
if (find_config_int(_cf->root, "devices/write_cache_state", '/', 1)) if (find_config_int(cf->root, "devices/write_cache_state", '/', 1))
dump_filter = 1; dump_filter = 1;
if (!stat(lvm_cache, &st) && !persistent_filter_load(f4)) if (!stat(lvm_cache, &st) && !persistent_filter_load(f4))
@ -737,7 +722,7 @@ static int init(void)
/* FIXME: Override from config file. (Append trailing slash if reqd) */ /* FIXME: Override from config file. (Append trailing slash if reqd) */
cmd->dev_dir = "/dev/"; cmd->dev_dir = "/dev/";
if (!(_cf = create_config_file())) { if (!(cmd->cf = create_config_file())) {
stack; stack;
goto out; goto out;
} }
@ -751,19 +736,19 @@ static int init(void)
e = e ? e : "/etc/lvm/lvm.conf"; e = e ? e : "/etc/lvm/lvm.conf";
if (stat(e, &info) != -1) { if (stat(e, &info) != -1) {
/* we've found a config file */ /* we've found a config file */
if (!read_config(_cf, e)) { if (!read_config(cmd->cf, e)) {
log_error("Failed to load config file %s", e); log_error("Failed to load config file %s", e);
goto out; goto out;
} }
__init_log(_cf); __init_log(cmd->cf);
} }
if (!dev_cache_setup()) { if (!dev_cache_setup(cmd->cf)) {
goto out; goto out;
} }
if (!(cmd->filter = filter_setup())) { if (!(cmd->filter = filter_setup(cmd->cf))) {
log_error("Failed to set up internal device filters"); log_error("Failed to set up internal device filters");
goto out; goto out;
} }
@ -802,7 +787,7 @@ static void fin(void)
cmd->filter->destroy(cmd->filter); cmd->filter->destroy(cmd->filter);
pool_destroy(cmd->mem); pool_destroy(cmd->mem);
dev_cache_exit(); dev_cache_exit();
destroy_config_file(_cf); destroy_config_file(cmd->cf);
dbg_free(cmd); dbg_free(cmd);
__fin_commands(); __fin_commands();
dump_memory(); dump_memory();

176
tools/lvreduce.c
View File

@ -22,179 +22,5 @@
int lvreduce(int argc, char **argv) int lvreduce(int argc, char **argv)
{ {
struct volume_group *vg; return lvresize(argc, argv);
struct logical_volume *lv;
struct list *lvh;
uint32_t extents = 0;
uint32_t size = 0;
sign_t sign = SIGN_NONE;
char *lv_name, *vg_name;
char *st;
int i;
if (arg_count(extents_ARG) + arg_count(size_ARG) != 1) {
log_error("Please specify either size or extents (not both)");
return EINVALID_CMD_LINE;
}
if (arg_count(extents_ARG)) {
extents = arg_int_value(extents_ARG, 0);
sign = arg_sign_value(extents_ARG, SIGN_NONE);
}
if (arg_count(size_ARG)) {
size = arg_int_value(size_ARG, 0);
sign = arg_sign_value(extents_ARG, SIGN_NONE);
}
if (sign == SIGN_PLUS) {
log_error("Positive sign not permitted - use lvextend");
return EINVALID_CMD_LINE;
}
if (!argc) {
log_error("Please provide the logical volume name");
return EINVALID_CMD_LINE;
}
lv_name = argv[0];
argv++;
argc--;
if (!(vg_name = extract_vgname(fid, lv_name))) {
log_error("Please provide a volume group name");
return EINVALID_CMD_LINE;
}
if ((st = strrchr(lv_name, '/')))
lv_name = st + 1;
/* does VG exist? */
log_verbose("Finding volume group %s", vg_name);
if (!(vg = fid->ops->vg_read(fid, vg_name))) {
log_error("Volume group %s doesn't exist", vg_name);
return ECMD_FAILED;
}
if (!(vg->status & ACTIVE)) {
log_error("Volume group %s must be active before changing a "
"logical volume", vg_name);
return ECMD_FAILED;
}
/* does LV exist? */
if (!(lvh = find_lv_in_vg(vg, lv_name))) {
log_error("Logical volume %s not found in volume group %s",
lv_name, vg_name);
return ECMD_FAILED;
}
lv = &list_item(lvh, struct lv_list)->lv;
if (!(lv->status & ACTIVE)) {
log_error("Logical volume %s must be active before reduction",
lv_name);
return ECMD_FAILED;
}
if (size) {
/* No of 512-byte sectors */
extents = size * 2;
if (extents % vg->extent_size) {
char *s1;
if (sign == SIGN_NONE)
extents += vg->extent_size -
(extents % vg->extent_size);
else
extents -= extents % vg->extent_size;
log_print("Rounding up size to full physical extent %s",
(s1 = display_size(extents / 2, SIZE_SHORT)));
dbg_free(s1);
}
extents /= vg->extent_size;
}
if (!extents) {
log_error("New size of 0 not permitted");
return EINVALID_CMD_LINE;
}
if (sign == SIGN_MINUS) {
if (extents >= lv->le_count) {
log_error("Unable to reduce %s below 1 extent",
lv_name);
return EINVALID_CMD_LINE;
}
extents = lv->le_count - extents;
} else {
if (extents >= lv->le_count) {
log_error("New size given (%d extents) not less than "
"existing size (%d extents)", extents,
lv->le_count);
return EINVALID_CMD_LINE;
}
}
/************ FIXME Stripes
size_rest = new_size % (vg->lv[l]->lv_stripes * vg->pe_size);
if (size_rest != 0) {
log_print
("rounding size %ld KB to stripe boundary size ",
new_size / 2);
new_size = new_size - size_rest;
printf("%ld KB\n", new_size / 2);
}
***********************/
if (lv->status & ACTIVE || lv_active(lv) > 0) {
char *dummy;
log_print("WARNING: Reducing active%s logical volume to %s",
(lv_open_count(lv) > 0) ? " and open" : "",
(dummy =
display_size(extents * vg->extent_size / 2,
SIZE_SHORT)));
log_print("THIS MAY DESTROY YOUR DATA (filesystem etc.)");
dbg_free(dummy);
}
if (!arg_count(force_ARG)) {
if (yes_no_prompt
("Do you really want to reduce %s? [y/n]: ", lv_name)
== 'n') {
log_print("Logical volume %s NOT reduced", lv_name);
return ECMD_FAILED;
}
}
for (i = extents; i < lv->le_count; i++) {
lv->map[i].pv->pe_allocated--;
}
lv->le_count = extents;
/********* FIXME Suspend lv ***********/
/* store vg on disk(s) */
if (!fid->ops->vg_write(fid, vg))
return ECMD_FAILED;
/* FIXME Ensure it always displays errors? */
if (!lv_reactivate(lv))
return ECMD_FAILED;
/********* FIXME Resume *********/
/********* FIXME Backup
if ((ret = do_autobackup(vg_name, vg)))
return ret;
************/
log_print("Logical volume %s reduced", lv_name);
return 0;
} }

281
tools/lvresize.c Normal file
View File

@ -0,0 +1,281 @@
/*
* Copyright (C) 2001 Sistina Software
*
* LVM is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* LVM is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LVM; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#include "tools.h"
int lvresize(int argc, char **argv)
{
struct volume_group *vg;
struct logical_volume *lv;
uint32_t extents = 0;
uint32_t size = 0;
sign_t sign = SIGN_NONE;
char *lv_name, *vg_name;
char *st;
char *dummy;
const char *cmd_name;
struct list *lvh, *pvh, *pvl;
int opt = 0;
enum {
LV_ANY = 0,
LV_REDUCE = 1,
LV_EXTEND = 2
} resize = LV_ANY;
cmd_name = command_name();
if (!strcmp(cmd_name, "lvreduce"))
resize = LV_REDUCE;
if (!strcmp(cmd_name, "lvextend"))
resize = LV_EXTEND;
if (arg_count(extents_ARG) + arg_count(size_ARG) != 1) {
log_error("Please specify either size or extents (not both)");
return EINVALID_CMD_LINE;
}
if (arg_count(extents_ARG)) {
extents = arg_int_value(extents_ARG, 0);
sign = arg_sign_value(extents_ARG, SIGN_NONE);
}
if (arg_count(size_ARG)) {
size = arg_int_value(size_ARG, 0);
sign = arg_sign_value(size_ARG, SIGN_NONE);
}
if (resize == LV_EXTEND && sign == SIGN_MINUS) {
log_error("Negative argument not permitted - use lvreduce");
return EINVALID_CMD_LINE;
}
if (resize == LV_REDUCE && sign == SIGN_PLUS) {
log_error("Positive sign not permitted - use lvextend");
return EINVALID_CMD_LINE;
}
if (!argc) {
log_error("Please provide the logical volume name");
return EINVALID_CMD_LINE;
}
lv_name = argv[0];
argv++;
argc--;
if (!(vg_name = extract_vgname(fid, lv_name))) {
log_error("Please provide a volume group name");
return EINVALID_CMD_LINE;
}
if ((st = strrchr(lv_name, '/')))
lv_name = st + 1;
/* does VG exist? */
log_verbose("Finding volume group %s", vg_name);
if (!(vg = fid->ops->vg_read(fid, vg_name))) {
log_error("Volume group %s doesn't exist", vg_name);
return ECMD_FAILED;
}
if (!(vg->status & ACTIVE)) {
log_error("Volume group %s must be active before changing a "
"logical volume", vg_name);
return ECMD_FAILED;
}
/* does LV exist? */
if (!(lvh = find_lv_in_vg(vg, lv_name))) {
log_error("Logical volume %s not found in volume group %s",
lv_name, vg_name);
return ECMD_FAILED;
}
lv = &list_item(lvh, struct lv_list)->lv;
if (!(lv->status & ACTIVE)) {
log_error("Logical volume %s must be active before change",
lv_name);
return ECMD_FAILED;
}
if (size) {
/* No of 512-byte sectors */
extents = size * 2;
if (extents % vg->extent_size) {
char *s1;
if (sign == SIGN_MINUS)
extents -= extents % vg->extent_size;
else
extents += vg->extent_size -
(extents % vg->extent_size);
log_print("Rounding up size to full physical extent %s",
(s1 = display_size(extents / 2, SIZE_SHORT)));
dbg_free(s1);
}
extents /= vg->extent_size;
}
if (sign == SIGN_PLUS)
extents += lv->le_count;
if (sign == SIGN_MINUS) {
if (extents >= lv->le_count) {
log_error("Unable to reduce %s below 1 extent",
lv_name);
return EINVALID_CMD_LINE;
}
extents = lv->le_count - extents;
}
/************ FIXME Stripes (lvreduce)
size_rest = new_size % (vg->lv[l]->lv_stripes * vg->pe_size);
if (size_rest != 0) {
log_print
("rounding size %ld KB to stripe boundary size ",
new_size / 2);
new_size = new_size - size_rest;
printf("%ld KB\n", new_size / 2);
}
***********************/
if (!extents) {
log_error("New size of 0 not permitted");
return EINVALID_CMD_LINE;
}
if (extents == lv->le_count) {
log_error("New size (%d extents) matches existing size "
"(%d extents)", extents, lv->le_count);
return EINVALID_CMD_LINE;
}
if (extents < lv->le_count) {
if (resize == LV_EXTEND) {
log_error("New size given (%d extents) not larger "
"than existing size (%d extents)",
extents, lv->le_count);
return EINVALID_CMD_LINE;
} else
resize = LV_REDUCE;
}
if (extents > lv->le_count) {
if (resize == LV_REDUCE) {
log_error("New size given (%d extents) not less than "
"existing size (%d extents)", extents,
lv->le_count);
return EINVALID_CMD_LINE;
} else
resize = LV_EXTEND;
}
if (resize == LV_REDUCE) {
if (argc)
log_print("Ignoring PVs on command line when reducing");
if (lv->status & ACTIVE || lv_active(lv)) {
dummy =
display_size(extents * vg->extent_size / 2,
SIZE_SHORT);
log_print("WARNING: Reducing active%s logical volume "
"to %s", lv_open_count(lv) ? " and open" : "",
dummy);
log_print("THIS MAY DESTROY YOUR DATA "
"(filesystem etc.)");
dbg_free(dummy);
}
if (!arg_count(force_ARG)) {
if (yes_no_prompt("Do you really want to reduce %s?"
" [y/n]: ", lv_name) == 'n') {
log_print("Logical volume %s NOT reduced",
lv_name);
return ECMD_FAILED;
}
}
lv_reduce(lv, lv->le_count - extents);
}
if (resize == LV_EXTEND && argc) {
/* Build up list of PVs */
if (!(pvh = pool_alloc(fid->cmd->mem, sizeof(struct list)))) {
log_error("pvh list allocation failed");
return ECMD_FAILED;
}
list_init(pvh);
for (; opt < argc; opt++) {
if (!(pvl = find_pv_in_vg(vg, argv[opt]))) {
log_error("Physical Volume %s not found in "
"Volume Group %s", argv[opt],
vg->name);
return EINVALID_CMD_LINE;
}
if (list_item(pvl, struct pv_list)->pv.pe_count ==
list_item(pvl, struct pv_list)->pv.pe_allocated) {
log_error("No free extents on physical volume"
" %s", argv[opt]);
continue;
/* FIXME Buy check not empty at end! */
}
list_add(pvh, pvl);
}
}
if (resize == LV_EXTEND) {
if (!argc) {
/* Use full list from VG */
pvh = &vg->pvs;
}
dummy = display_size(extents * vg->extent_size / 2, SIZE_SHORT);
log_print("Extending logical volume %s to %s", lv_name, dummy);
dbg_free(dummy);
lv_extend(lv, extents - lv->le_count, pvh);
}
/********* FIXME Suspend lv ***********/
/* store vg on disk(s) */
if (!fid->ops->vg_write(fid, vg))
return ECMD_FAILED;
/* FIXME Ensure it always displays errors? */
if (!lv_reactivate(lv))
return ECMD_FAILED;
/********* FIXME Resume *********/
/********* FIXME Backup
if ((ret = do_autobackup(vg_name, vg)))
return ret;
************/
log_print("Logical volume %s successfully resized", lv_name);
return 0;
}

18
tools/tools.h
View File

@ -81,6 +81,19 @@ struct arg {
extern struct arg the_args[ARG_COUNT + 1]; extern struct arg the_args[ARG_COUNT + 1];
/* a register of the lvm commands */
struct command {
const char *name;
const char *desc;
const char *usage;
command_fn fn;
int num_args;
int *valid_args;
};
extern struct command *the_command;
void usage(const char *name); void usage(const char *name);
/* the argument verify/normalise functions */ /* the argument verify/normalise functions */
@ -122,7 +135,10 @@ static inline int arg_count_increment(int a)
return the_args[a].count++; return the_args[a].count++;
} }
struct config_file *active_config_file(void); static inline const char *command_name(void)
{
return the_command->name;
}
extern struct format_instance *fid; extern struct format_instance *fid;