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sigint: improve logic on for sigint reaction

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Fix and improve handling on sigint.

Always check for signal presence *before* calling of command,
so it will not call the command when break was hit.

If the command has been finished succesfully there is
no problem to mark the command ok and not report interrupt at all.

Fix cuple related stack; reports and assignments.
This commit is contained in:
Zdenek Kabelac 2013-07-01 16:30:12 +02:00
parent ffa11ed356
commit 6f335ffa35
8 changed files with 91 additions and 77 deletions
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1
WHATS_NEW
View File

@ -1,5 +1,6 @@
Version 2.02.99 -
===================================
Improve error loging when user tries to interrupt commands.
Rename _swap_lv to _swap_lv_identifiers and move to allow an additional user.
Rename snapshot segment returning methods from find_*_cow to find_*_snapshot.
liblvm/python API: Additions: PV create/removal/resize/listing

8
lib/cache/lvmetad.c vendored
View File

@ -955,11 +955,13 @@ int lvmetad_pvscan_all_devs(struct cmd_context *cmd, activation_handler handler)
init_silent(1);
while ((dev = dev_iter_get(iter))) {
if (sigint_caught()) {
r = 0;
stack;
break;
}
if (!lvmetad_pvscan_single(cmd, dev, handler))
r = 0;
if (sigint_caught())
break;
}
init_silent(was_silent);

3
lib/locking/locking.c
View File

@ -54,6 +54,9 @@ static void _catch_sigint(int unused __attribute__((unused)))
}
int sigint_caught(void) {
if (_sigint_caught)
log_error("Interrupted...");
return _sigint_caught;
}

2
lib/metadata/lv_manip.c
View File

@ -3252,7 +3252,7 @@ static int _request_confirmation(struct cmd_context *cmd,
return 0;
}
if (sigint_caught())
return 0;
return_0;
}
return 1;

4
tools/lvchange.c
View File

@ -347,7 +347,7 @@ static int lvchange_resync(struct cmd_context *cmd, struct logical_volume *lv)
}
if (sigint_caught())
return 0;
return_0;
active = 1;
}
@ -643,7 +643,7 @@ static int lvchange_persistent(struct cmd_context *cmd,
}
if (sigint_caught())
return 0;
return_0;
log_verbose("Ensuring %s is inactive.", lv->name);
if (!deactivate_lv(cmd, lv)) {

6
tools/pvcreate.c
View File

@ -108,14 +108,14 @@ int pvcreate(struct cmd_context *cmd, int argc, char **argv)
}
for (i = 0; i < argc; i++) {
if (sigint_caught())
return_ECMD_FAILED;
dm_unescape_colons_and_at_signs(argv[i], NULL, NULL);
if (ECMD_PROCESSED != pvcreate_locked(cmd, argv[i], &pp)) {
ret = ECMD_FAILED;
}
if (sigint_caught())
return ret;
}
return ret;

18
tools/pvscan.c
View File

@ -193,13 +193,16 @@ static int _pvscan_lvmetad(struct cmd_context *cmd, int argc, char **argv)
ret = ECMD_FAILED;
continue;
}
if (!lvmetad_pvscan_single(cmd, dev, handler)) {
if (sigint_caught()) {
ret = ECMD_FAILED;
stack;
break;
}
if (sigint_caught())
if (!lvmetad_pvscan_single(cmd, dev, handler)) {
ret = ECMD_FAILED;
stack;
break;
}
}
if (!devno_args)
@ -232,14 +235,17 @@ static int _pvscan_lvmetad(struct cmd_context *cmd, int argc, char **argv)
dm_free(buf);
continue;
}
if (sigint_caught()) {
ret = ECMD_FAILED;
stack;
break;
}
if (!lvmetad_pvscan_single(cmd, dev, handler)) {
ret = ECMD_FAILED;
stack;
break;
}
if (sigint_caught())
break;
}
out:

126
tools/toollib.c
View File

@ -161,6 +161,9 @@ int process_each_lv_in_vg(struct cmd_context *cmd,
if (!process_lv)
continue;
if (sigint_caught())
return_ECMD_FAILED;
lvl->lv->vg->cmd_missing_vgs = 0;
ret = process_single_lv(cmd, lvl->lv, handle);
if (ret != ECMD_PROCESSED && failed_lvnames) {
@ -175,10 +178,6 @@ int process_each_lv_in_vg(struct cmd_context *cmd,
}
if (ret > ret_max)
ret_max = ret;
if (sigint_caught()) {
stack;
return ret_max;
}
}
if (lvargs_supplied && lvargs_matched != dm_list_size(arg_lvnames)) {
@ -357,7 +356,10 @@ int process_each_lv(struct cmd_context *cmd, int argc, char **argv,
}
}
while (!sigint_caught()) {
for (;;) {
if (sigint_caught())
return_ECMD_FAILED;
ret = process_each_lv_in_vg(cmd, cvl_vg->vg, &lvnames,
tags_arg, &failed_lvnames,
handle, process_single_lv);
@ -384,11 +386,6 @@ int process_each_lv(struct cmd_context *cmd, int argc, char **argv,
ret_max = ret;
free_cmd_vgs(&cmd_vgs);
/* FIXME: logic for breaking command is not consistent */
if (sigint_caught()) {
stack;
return ECMD_FAILED;
}
}
return ret_max;
@ -438,11 +435,14 @@ int process_each_segment_in_pv(struct cmd_context *cmd,
ret_max = ret;
} else
dm_list_iterate_items(pvseg, &pv->segments) {
if (sigint_caught()) {
ret_max = ECMD_FAILED;
stack;
break;
}
ret = process_single_pvseg(cmd, vg, pvseg, handle);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
break;
}
if (vg_name)
@ -463,12 +463,11 @@ int process_each_segment_in_lv(struct cmd_context *cmd,
int ret;
dm_list_iterate_items(seg, &lv->segments) {
if (sigint_caught())
return_ECMD_FAILED;
ret = process_single_seg(cmd, seg, handle);
if (ret > ret_max)
ret_max = ret;
/* FIXME: logic for breaking command is not consistent */
if (sigint_caught())
return ECMD_FAILED;
}
return ret_max;
@ -491,9 +490,9 @@ static int _process_one_vg(struct cmd_context *cmd, const char *vg_name,
return_0;
for (;;) {
/* FIXME: consistent handling of command break */
if (sigint_caught()) {
ret = ECMD_FAILED;
stack;
break;
}
if (!cmd_vg_read(cmd, &cmd_vgs))
@ -502,6 +501,7 @@ static int _process_one_vg(struct cmd_context *cmd, const char *vg_name,
(!((flags & READ_ALLOW_INCONSISTENT) &&
(vg_read_error(cvl_vg->vg) == FAILED_INCONSISTENT)))) {
ret = ECMD_FAILED;
stack;
break;
}
@ -592,6 +592,8 @@ int process_each_vg(struct cmd_context *cmd, int argc, char **argv,
return ret_max;
}
dm_list_iterate_items(sl, vgids) {
if (sigint_caught())
return_ECMD_FAILED;
vgid = sl->str;
if (!(vgid) || !(vg_name = lvmcache_vgname_from_vgid(cmd->mem, vgid)))
continue;
@ -599,11 +601,11 @@ int process_each_vg(struct cmd_context *cmd, int argc, char **argv,
&arg_vgnames,
flags, handle,
ret_max, process_single_vg);
if (sigint_caught())
return ret_max;
}
} else {
dm_list_iterate_items(sl, vgnames) {
if (sigint_caught())
return_ECMD_FAILED;
vg_name = sl->str;
if (is_orphan_vg(vg_name))
continue; /* FIXME Unnecessary? */
@ -611,8 +613,6 @@ int process_each_vg(struct cmd_context *cmd, int argc, char **argv,
&arg_vgnames,
flags, handle,
ret_max, process_single_vg);
if (sigint_caught())
return ret_max;
}
}
@ -628,14 +628,14 @@ int process_each_pv_in_vg(struct cmd_context *cmd, struct volume_group *vg,
struct pv_list *pvl;
dm_list_iterate_items(pvl, &vg->pvs) {
if (sigint_caught())
return_ECMD_FAILED;
if (tags && !dm_list_empty(tags) &&
!str_list_match_list(tags, &pvl->pv->tags, NULL)) {
continue;
}
if ((ret = process_single_pv(cmd, vg, pvl->pv, handle)) > ret_max)
ret_max = ret;
if (sigint_caught())
return ret_max;
}
return ret_max;
@ -650,12 +650,10 @@ static int _process_all_devs(struct cmd_context *cmd, void *handle,
struct device *dev;
int ret_max = ECMD_PROCESSED;
int ret = 0;
int ret;
if (!scan_vgs_for_pvs(cmd, 1)) {
stack;
return ECMD_FAILED;
}
if (!scan_vgs_for_pvs(cmd, 1))
return_ECMD_FAILED;
if (!(iter = dev_iter_create(cmd->filter, 1))) {
log_error("dev_iter creation failed");
@ -663,6 +661,12 @@ static int _process_all_devs(struct cmd_context *cmd, void *handle,
}
while ((dev = dev_iter_get(iter))) {
if (sigint_caught()) {
ret_max = ECMD_FAILED;
stack;
break;
}
if (!(pv = pv_read(cmd, dev_name(dev), 0, 0))) {
memset(&pv_dummy, 0, sizeof(pv_dummy));
dm_list_init(&pv_dummy.tags);
@ -670,14 +674,12 @@ static int _process_all_devs(struct cmd_context *cmd, void *handle,
pv_dummy.dev = dev;
pv = &pv_dummy;
}
ret = process_single_pv(cmd, NULL, pv, handle);
free_pv_fid(pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
break;
free_pv_fid(pv);
}
dev_iter_destroy(iter);
@ -718,6 +720,10 @@ int process_each_pv(struct cmd_context *cmd, int argc, char **argv,
if (argc) {
log_verbose("Using physical volume(s) on command line");
for (; opt < argc; opt++) {
if (sigint_caught()) {
ret_max = ECMD_FAILED;
goto_out;
}
dm_unescape_colons_and_at_signs(argv[opt], NULL, &at_sign);
if (at_sign && (at_sign == argv[opt])) {
tagname = at_sign + 1;
@ -786,22 +792,22 @@ int process_each_pv(struct cmd_context *cmd, int argc, char **argv,
}
ret = process_single_pv(cmd, vg, pv, handle);
if (ret > ret_max)
ret_max = ret;
/*
* Free PV only if we called pv_read before,
* otherwise the PV structure is part of the VG.
*/
if (!vg)
free_pv_fid(pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
}
if (!dm_list_empty(&tags) && (vgnames = get_vgnames(cmd, 1)) &&
!dm_list_empty(vgnames)) {
dm_list_iterate_items(sll, vgnames) {
if (sigint_caught()) {
ret_max = ECMD_FAILED;
goto_out;
}
vg = vg_read(cmd, sll->str, NULL, flags);
if (vg_read_error(vg)) {
ret_max = ECMD_FAILED;
@ -813,31 +819,20 @@ int process_each_pv(struct cmd_context *cmd, int argc, char **argv,
ret = process_each_pv_in_vg(cmd, vg, &tags,
handle,
process_single_pv);
unlock_and_release_vg(cmd, vg, sll->str);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
unlock_and_release_vg(cmd, vg, sll->str);
}
}
} else {
if (vg) {
log_verbose("Using all physical volume(s) in "
"volume group");
ret = process_each_pv_in_vg(cmd, vg, NULL, handle,
process_single_pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
ret_max = process_each_pv_in_vg(cmd, vg, NULL, handle,
process_single_pv);
} else if (arg_count(cmd, all_ARG)) {
ret = _process_all_devs(cmd, handle, process_single_pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
ret_max = _process_all_devs(cmd, handle, process_single_pv);
} else {
log_verbose("Scanning for physical volume names");
@ -846,13 +841,16 @@ int process_each_pv(struct cmd_context *cmd, int argc, char **argv,
goto bad;
dm_list_iterate_items(pvl, pvslist) {
if (sigint_caught()) {
ret_max = ECMD_FAILED;
goto_out;
}
ret = process_single_pv(cmd, NULL, pvl->pv,
handle);
free_pv_fid(pvl->pv);
if (ret > ret_max)
ret_max = ret;
if (sigint_caught())
goto out;
free_pv_fid(pvl->pv);
}
}
}
@ -1351,12 +1349,16 @@ int vg_refresh_visible(struct cmd_context *cmd, struct volume_group *vg)
sigint_allow();
dm_list_iterate_items(lvl, &vg->lvs) {
if (sigint_caught())
return_0;
if (sigint_caught()) {
r = 0;
stack;
break;
}
if (lv_is_visible(lvl->lv))
if (!lv_refresh(cmd, lvl->lv))
r = 0;
if (lv_is_visible(lvl->lv) && !lv_refresh(cmd, lvl->lv)) {
r = 0;
stack;
}
}
sigint_restore();