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Code Releases Activity

deal with error-related FIXMEs

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This commit is contained in:
Alasdair Kergon 2009-08-03 11:01:26 +00:00
parent b42929dca7
commit b59c9854e8
1 changed files with 42 additions and 23 deletions
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65
libdm/libdm-common.c
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@ -818,7 +818,13 @@ int dm_udev_get_sync_support(void)
static int _get_cookie_sem(uint32_t cookie, int *semid)
{
/* FIXME Ensure cookie has COOKIE_MAGIC prefix */
if (!(cookie >> 16 & COOKIE_MAGIC)) {
log_error("Could not continue to access notification "
"semaphore identified by cookie value %"
PRIu32 " (0x%x). Incorrect cookie prefix.");
return 0;
}
if ((*semid = semget((key_t) cookie, 1, 0)) >= 0)
return 1;
@ -836,11 +842,10 @@ static int _get_cookie_sem(uint32_t cookie, int *semid)
cookie, cookie);
break;
default:
/* FIXME errno use missing */
log_error("Failed to access notification "
"semaphore identified by cookie "
"value %" PRIu32 " (0x%x)",
cookie, cookie);
"value %" PRIu32 " (0x%x): %s",
cookie, cookie, strerror(errno));
break;
}
@ -851,26 +856,42 @@ static int _udev_notify_sem_inc(int semid)
{
struct sembuf sb = {0, 1, 0};
/* FIXME errno use missing */
return semop(semid, &sb, 1) == 0;
if (semop(semid, &sb, 1) < 0) {
log_error("semid %d: semop failed: %s", semid, strerror(errno));
return 0;
}
return 1;
}
static int _udev_notify_sem_dec(int semid)
{
/* FIXME Think we should have IPC_NOWAIT here in case something went wrong and it's already 0 */
struct sembuf sb = {0, -1, 0};
struct sembuf sb = {0, -1, IPC_NOWAIT};
/* FIXME errno use missing */
return semop(semid, &sb, 1) == 0;
if (semop(semid, &sb, 1) < 0) {
switch (errno) {
case EAGAIN:
log_error("semid %d: semop failed: "
"incorrect semaphore state",
semid);
break;
default:
log_error("semid %d: semop failed: %s",
semid, strerror(errno));
break;
}
return 0;
}
return 1;
}
static int _udev_notify_sem_destroy(int semid, uint32_t cookie)
{
/* FIXME errno use missing */
if (semctl(semid, 0, IPC_RMID, 0) < 0) {
log_error("Could not cleanup notification semaphore "
"identified by cookie value %" PRIu32 " (0x%x)",
cookie, cookie);
"identified by cookie value %" PRIu32 " (0x%x): %s",
cookie, cookie, strerror(errno));
return 0;
}
@ -914,22 +935,21 @@ static int _udev_notify_sem_create(uint32_t *cookie, int *semid)
"notification semaphore");
goto bad;
case ENOSPC:
/* FIXME Suggest what to check & do */
log_error("Limit for the maximum number "
"of semaphores reached");
"of semaphores reached. You can "
"check and set the limits in "
"/proc/sys/kernel/sem.");
goto bad;
default:
/* FIXME Use errno */
log_error("Failed to create "
"notification semaphore");
log_error("Failed to create notification "
"semaphore: %s", strerror(errno));
goto bad;
}
}
} while (!base_cookie);
if (semctl(gen_semid, 0, SETVAL, 1) < 0) {
/* FIXME Use errno and give gen_semid */
log_error("Failed to initialize notification semaphore");
log_error("semid %d: semctl failed: %s", gen_semid, strerror(errno));
/* We have to destroy just created semaphore
* so it won't stay in the system. */
_udev_notify_sem_destroy(gen_semid, gen_cookie);
@ -1027,10 +1047,9 @@ repeat_wait:
if (semop(semid, &sb, 1) < 0) {
if (errno == EINTR)
goto repeat_wait;
/* FIXME missing errno use */
log_error("Could not set wait state for notification semaphore "
"identified by cookie value %" PRIu32 " (0x%x)",
cookie, cookie);
"identified by cookie value %" PRIu32 " (0x%x): %s",
cookie, cookie, strerror(errno));
_udev_notify_sem_destroy(semid, cookie);
return 0;
}