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lvchange: Allow -prw to change kernel only.

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If an LV is already rw but still ro in the kernel, allow -prw to issue a
refresh to try to change the kernel state to rw.

Intended for use after clearing activation/read_only_volume_list in
lvm.conf.
This commit is contained in:
Alasdair G Kergon 2015-02-26 18:38:26 +00:00
parent 71d97fd88a
commit b5394c8f26
1 changed files with 59 additions and 50 deletions
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109
tools/lvchange.c
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@ -16,17 +16,18 @@
#include "tools.h"
#include "memlock.h"
static int lvchange_permission(struct cmd_context *cmd,
struct logical_volume *lv)
static int _lvchange_permission(struct cmd_context *cmd,
struct logical_volume *lv)
{
uint32_t lv_access;
struct lvinfo info;
unsigned info_obtained = 0;
lv_access = arg_uint_value(cmd, permission_ARG, 0);
if ((lv_access & LVM_WRITE) && (lv->status & LVM_WRITE)) {
log_error("Logical volume \"%s\" is already writable",
lv->name);
if (lv_is_external_origin(lv)) {
log_error("Cannot change permissions of external origin "
"\"%s\".", lv->name);
return 0;
}
@ -36,14 +37,22 @@ static int lvchange_permission(struct cmd_context *cmd,
return 0;
}
if (lv_is_external_origin(lv)) {
log_error("Cannot change permissions of external origin "
"\"%s\".", lv->name);
if ((lv_access & LVM_WRITE) && (lv->status & LVM_WRITE)) {
/* Refresh if it's read-write in metadata but read-only in kernel */
if (lv_info(cmd, lv, 0, &info, 0, 0) &&
(info_obtained = 1, info.exists) && info.read_only) {
log_print_unless_silent("Logical volume \"%s\" is already writable. Refreshing kernel state.",
lv->name);
return lv_refresh(cmd, lv);
}
log_error("Logical volume \"%s\" is already writable",
lv->name);
return 0;
}
if (lv_is_mirrored(lv) && vg_is_clustered(lv->vg) &&
lv_info(cmd, lv, 0, &info, 0, 0) && info.exists) {
(info_obtained || lv_info(cmd, lv, 0, &info, 0, 0)) && info.exists) {
log_error("Cannot change permissions of mirror \"%s\" "
"while active.", lv->name);
return 0;
@ -79,8 +88,8 @@ static int lvchange_permission(struct cmd_context *cmd,
return 1;
}
static int lvchange_pool_update(struct cmd_context *cmd,
struct logical_volume *lv)
static int _lvchange_pool_update(struct cmd_context *cmd,
struct logical_volume *lv)
{
int update = 0;
unsigned val;
@ -126,8 +135,8 @@ static int lvchange_pool_update(struct cmd_context *cmd,
return 1;
}
static int lvchange_monitoring(struct cmd_context *cmd,
struct logical_volume *lv)
static int _lvchange_monitoring(struct cmd_context *cmd,
struct logical_volume *lv)
{
struct lvinfo info;
@ -148,8 +157,8 @@ static int lvchange_monitoring(struct cmd_context *cmd,
return 1;
}
static int lvchange_background_polling(struct cmd_context *cmd,
struct logical_volume *lv)
static int _lvchange_background_polling(struct cmd_context *cmd,
struct logical_volume *lv)
{
struct lvinfo info;
@ -257,7 +266,7 @@ static int attach_metadata_devices(struct lv_segment *seg, struct dm_list *list)
*
* Suspend and resume a logical volume.
*/
static int lvchange_refresh(struct cmd_context *cmd, struct logical_volume *lv)
static int _lvchange_refresh(struct cmd_context *cmd, struct logical_volume *lv)
{
log_verbose("Refreshing logical volume \"%s\" (if active)", lv->name);
@ -285,7 +294,7 @@ static int _reactivate_lv(struct logical_volume *lv,
*
* Force a mirror or RAID array to undergo a complete initializing resync.
*/
static int lvchange_resync(struct cmd_context *cmd, struct logical_volume *lv)
static int _lvchange_resync(struct cmd_context *cmd, struct logical_volume *lv)
{
int active = 0;
int exclusive = 0;
@ -468,7 +477,7 @@ static int lvchange_resync(struct cmd_context *cmd, struct logical_volume *lv)
return 1;
}
static int lvchange_alloc(struct cmd_context *cmd, struct logical_volume *lv)
static int _lvchange_alloc(struct cmd_context *cmd, struct logical_volume *lv)
{
int want_contiguous = arg_int_value(cmd, contiguous_ARG, 0);
alloc_policy_t alloc = (alloc_policy_t)
@ -499,8 +508,8 @@ static int lvchange_alloc(struct cmd_context *cmd, struct logical_volume *lv)
return 1;
}
static int lvchange_errorwhenfull(struct cmd_context *cmd,
struct logical_volume *lv)
static int _lvchange_errorwhenfull(struct cmd_context *cmd,
struct logical_volume *lv)
{
unsigned ewf = arg_int_value(cmd, errorwhenfull_ARG, 0);
@ -521,8 +530,8 @@ static int lvchange_errorwhenfull(struct cmd_context *cmd,
return 1;
}
static int lvchange_readahead(struct cmd_context *cmd,
struct logical_volume *lv)
static int _lvchange_readahead(struct cmd_context *cmd,
struct logical_volume *lv)
{
unsigned read_ahead = 0;
unsigned pagesize = (unsigned) lvm_getpagesize() >> SECTOR_SHIFT;
@ -566,8 +575,8 @@ static int lvchange_readahead(struct cmd_context *cmd,
return 1;
}
static int lvchange_persistent(struct cmd_context *cmd,
struct logical_volume *lv)
static int _lvchange_persistent(struct cmd_context *cmd,
struct logical_volume *lv)
{
enum activation_change activate = CHANGE_AN;
@ -639,7 +648,7 @@ static int lvchange_persistent(struct cmd_context *cmd,
return 1;
}
static int lvchange_cachepolicy(struct cmd_context *cmd, struct logical_volume *lv)
static int _lvchange_cachepolicy(struct cmd_context *cmd, struct logical_volume *lv)
{
struct dm_config_tree *policy = NULL;
int r = 0;
@ -663,7 +672,7 @@ out:
return r;
}
static int lvchange_tag(struct cmd_context *cmd, struct logical_volume *lv, int arg)
static int _lvchange_tag(struct cmd_context *cmd, struct logical_volume *lv, int arg)
{
if (!change_tag(cmd, NULL, lv, NULL, arg))
return_0;
@ -679,7 +688,7 @@ static int lvchange_tag(struct cmd_context *cmd, struct logical_volume *lv, int
return 1;
}
static int lvchange_writemostly(struct logical_volume *lv)
static int _lvchange_writemostly(struct logical_volume *lv)
{
int s, pv_count, i = 0;
char **pv_names;
@ -779,7 +788,7 @@ static int lvchange_writemostly(struct logical_volume *lv)
return 1;
}
static int lvchange_recovery_rate(struct logical_volume *lv)
static int _lvchange_recovery_rate(struct logical_volume *lv)
{
struct cmd_context *cmd = lv->vg->cmd;
struct lv_segment *raid_seg = first_seg(lv);
@ -810,7 +819,7 @@ static int lvchange_recovery_rate(struct logical_volume *lv)
return 1;
}
static int lvchange_profile(struct logical_volume *lv)
static int _lvchange_profile(struct logical_volume *lv)
{
const char *old_profile_name, *new_profile_name;
struct profile *new_profile;
@ -841,7 +850,7 @@ static int lvchange_profile(struct logical_volume *lv)
return 1;
}
static int lvchange_activation_skip(struct logical_volume *lv)
static int _lvchange_activation_skip(struct logical_volume *lv)
{
int skip = arg_int_value(lv->vg->cmd, setactivationskip_ARG, 0);
@ -860,7 +869,7 @@ static int lvchange_activation_skip(struct logical_volume *lv)
static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
struct processing_handle *handle __attribute__((unused)))
struct processing_handle *handle __attribute__((unused)))
{
int doit = 0, docmds = 0;
struct logical_volume *origin;
@ -966,7 +975,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
if (arg_count(cmd, permission_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_permission(cmd, lv);
doit += _lvchange_permission(cmd, lv);
docmds++;
}
@ -974,7 +983,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
if (arg_count(cmd, contiguous_ARG) || arg_count(cmd, alloc_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_alloc(cmd, lv);
doit += _lvchange_alloc(cmd, lv);
docmds++;
}
@ -982,7 +991,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
if (arg_count(cmd, errorwhenfull_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_errorwhenfull(cmd, lv);
doit += _lvchange_errorwhenfull(cmd, lv);
docmds++;
}
@ -990,7 +999,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
if (arg_count(cmd, readahead_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_readahead(cmd, lv);
doit += _lvchange_readahead(cmd, lv);
docmds++;
}
@ -998,7 +1007,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
if (arg_count(cmd, persistent_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_persistent(cmd, lv);
doit += _lvchange_persistent(cmd, lv);
docmds++;
if (sigint_caught())
return_ECMD_FAILED;
@ -1008,7 +1017,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
arg_count(cmd, zero_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_pool_update(cmd, lv);
doit += _lvchange_pool_update(cmd, lv);
docmds++;
}
@ -1016,7 +1025,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
if (arg_count(cmd, addtag_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_tag(cmd, lv, addtag_ARG);
doit += _lvchange_tag(cmd, lv, addtag_ARG);
docmds++;
}
@ -1024,7 +1033,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
if (arg_count(cmd, deltag_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_tag(cmd, lv, deltag_ARG);
doit += _lvchange_tag(cmd, lv, deltag_ARG);
docmds++;
}
@ -1032,7 +1041,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
if (arg_count(cmd, writemostly_ARG) || arg_count(cmd, writebehind_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_writemostly(lv);
doit += _lvchange_writemostly(lv);
docmds++;
}
@ -1041,7 +1050,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
arg_count(cmd, maxrecoveryrate_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_recovery_rate(lv);
doit += _lvchange_recovery_rate(lv);
docmds++;
}
@ -1050,21 +1059,21 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
arg_count(cmd, detachprofile_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_profile(lv);
doit += _lvchange_profile(lv);
docmds++;
}
if (arg_count(cmd, setactivationskip_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_activation_skip(lv);
doit += _lvchange_activation_skip(lv);
docmds++;
}
if (arg_count(cmd, cachepolicy_ARG) || arg_count(cmd, cachesettings_ARG)) {
if (!archive(lv->vg))
return_ECMD_FAILED;
doit += lvchange_cachepolicy(cmd, lv);
doit += _lvchange_cachepolicy(cmd, lv);
docmds++;
}
@ -1072,7 +1081,7 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
log_print_unless_silent("Logical volume \"%s\" changed.", lv->name);
if (arg_count(cmd, resync_ARG) &&
!lvchange_resync(cmd, lv))
!_lvchange_resync(cmd, lv))
return_ECMD_FAILED;
if (arg_count(cmd, syncaction_ARG) &&
@ -1084,15 +1093,15 @@ static int _lvchange_single(struct cmd_context *cmd, struct logical_volume *lv,
if (!_lvchange_activate(cmd, lv))
return_ECMD_FAILED;
} else if (arg_count(cmd, refresh_ARG)) {
if (!lvchange_refresh(cmd, lv))
if (!_lvchange_refresh(cmd, lv))
return_ECMD_FAILED;
} else {
if (arg_count(cmd, monitor_ARG) &&
!lvchange_monitoring(cmd, lv))
!_lvchange_monitoring(cmd, lv))
return_ECMD_FAILED;
if (arg_count(cmd, poll_ARG) &&
!lvchange_background_polling(cmd, lv))
!_lvchange_background_polling(cmd, lv))
return_ECMD_FAILED;
}
@ -1136,8 +1145,8 @@ int lvchange(struct cmd_context *cmd, int argc, char **argv)
int update = update_partial_safe || update_partial_unsafe;
if (!update &&
!arg_count(cmd, activate_ARG) && !arg_count(cmd, refresh_ARG) &&
!arg_count(cmd, monitor_ARG) && !arg_count(cmd, poll_ARG)) {
!arg_count(cmd, activate_ARG) && !arg_count(cmd, refresh_ARG) &&
!arg_count(cmd, monitor_ARG) && !arg_count(cmd, poll_ARG)) {
log_error("Need 1 or more of -a, -C, -M, -p, -r, -Z, "
"--resync, --refresh, --alloc, --addtag, --deltag, "
"--monitor, --poll or --discards");