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Code Releases Activity

Attempt to fix resizing of snapshot origins.

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This commit is contained in:
Alasdair Kergon 2004-05-12 20:40:34 +00:00
parent 241913fe60
commit 369028100b
1 changed files with 61 additions and 50 deletions
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111
lib/activate/dev_manager.c
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@ -66,7 +66,8 @@ enum {
SUSPENDED = 4,
NOPROPAGATE = 5,
TOPLEVEL = 6,
REMOVE = 7
REMOVE = 7,
RESUME_IMMEDIATE = 8
};
typedef enum {
@ -549,6 +550,55 @@ static int _rename(struct dev_layer *dl, char *newname)
return r;
}
static int _suspend_or_resume(const char *name, action_t suspend)
{
int r;
struct dm_task *dmt;
int sus = (suspend == SUSPEND) ? 1 : 0;
int task = sus ? DM_DEVICE_SUSPEND : DM_DEVICE_RESUME;
log_very_verbose("%s %s", sus ? "Suspending" : "Resuming", name);
if (!(dmt = _setup_task(name, NULL, 0, task))) {
stack;
return 0;
}
if (!(r = dm_task_run(dmt)))
log_error("Couldn't %s device '%s'", sus ? "suspend" : "resume",
name);
dm_task_destroy(dmt);
return r;
}
static int _suspend(struct dev_layer *dl)
{
if (!dl->info.exists || dl->info.suspended)
return 1;
if (!_suspend_or_resume(dl->name, SUSPEND)) {
stack;
return 0;
}
dl->info.suspended = 1;
return 1;
}
static int _resume(struct dev_layer *dl)
{
if (!dl->info.exists || !dl->info.suspended)
return 1;
if (!_suspend_or_resume(dl->name, RESUME)) {
stack;
return 0;
}
dl->info.suspended = 0;
return 1;
}
static int _load(struct dev_manager *dm, struct dev_layer *dl, int task)
{
int r = 1;
@ -625,6 +675,13 @@ static int _load(struct dev_manager *dm, struct dev_layer *dl, int task)
goto out;
}
if (_get_flag(dl, RESUME_IMMEDIATE) && dl->info.suspended &&
!_resume(dl)) {
stack;
r = 0;
goto out;
}
log_very_verbose("Activated %s %s %03u:%03u", dl->name,
dl->dlid, dl->info.major, dl->info.minor);
@ -671,55 +728,6 @@ static int _remove(struct dev_layer *dl)
return r;
}
static int _suspend_or_resume(const char *name, action_t suspend)
{
int r;
struct dm_task *dmt;
int sus = (suspend == SUSPEND) ? 1 : 0;
int task = sus ? DM_DEVICE_SUSPEND : DM_DEVICE_RESUME;
log_very_verbose("%s %s", sus ? "Suspending" : "Resuming", name);
if (!(dmt = _setup_task(name, NULL, 0, task))) {
stack;
return 0;
}
if (!(r = dm_task_run(dmt)))
log_error("Couldn't %s device '%s'", sus ? "suspend" : "resume",
name);
dm_task_destroy(dmt);
return r;
}
static int _suspend(struct dev_layer *dl)
{
if (!dl->info.exists || dl->info.suspended)
return 1;
if (!_suspend_or_resume(dl->name, SUSPEND)) {
stack;
return 0;
}
dl->info.suspended = 1;
return 1;
}
static int _resume(struct dev_layer *dl)
{
if (!dl->info.exists || !dl->info.suspended)
return 1;
if (!_suspend_or_resume(dl->name, RESUME)) {
stack;
return 0;
}
dl->info.suspended = 0;
return 1;
}
/*
* The functions that populate the table in a dm_task as part of
* a create/reload.
@ -1287,6 +1295,9 @@ static int _expand_origin_real(struct dev_manager *dm,
_clear_flag(dl, VISIBLE);
_clear_flag(dl, TOPLEVEL);
/* Size changes must take effect before tables using it are reloaded */
_set_flag(dl, RESUME_IMMEDIATE);
real_dlid = dl->dlid;
if (!(dl = _create_layer(dm, NULL, lv))) {