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brick_say: ensure that OOM cannot disturb

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Thomas Schoebel-Theuer 2012-12-04 18:01:17 +01:00 committed by Thomas Schoebel-Theuer
parent 79b76d41c7
commit ee15a118e0
2 changed files with 20 additions and 12 deletions
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2
brick_mem.c
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@ -216,7 +216,7 @@ char *_brick_string_alloc(int len, int line)
#ifdef CONFIG_MARS_DEBUG
res = kzalloc(len + 1024, GFP_BRICK);
#else
res = kzalloc(len, GFP_BRICK);
res = kzalloc(len + 1, GFP_BRICK);
#endif
#ifdef CONFIG_MARS_MEM_RETRY
if (likely(res))

30
brick_say.c
View File

@ -282,25 +282,28 @@ struct say_channel *_make_channel(const char *name)
say(SAY_ERROR, "cannot create channel '%s'\n", name);
goto done;
}
restart:
res = kzalloc(sizeof(struct say_channel), mode);
if (unlikely(!res)) {
goto done;
schedule();
goto restart;
}
init_waitqueue_head(&res->ch_progress);
restart2:
res->ch_name = kstrdup(name, mode);
if (unlikely(!res->ch_name)) {
kfree(res);
goto done;
schedule();
goto restart2;
}
for (i = 0; i < MAX_SAY_CLASS; i++) {
spin_lock_init(&res->ch_lock[i]);
for (j = 0; j < 2; j++) {
char *buf = (void*)__get_free_pages(mode, SAY_ORDER);
char *buf;
restart3:
buf = (void*)__get_free_pages(mode, SAY_ORDER);
if (unlikely(!buf)) {
del_channel(res);
res = NULL;
goto done;
schedule();
goto restart3;
}
res->ch_buf[i][j] = buf;
}
@ -540,10 +543,15 @@ void out_to_syslog(int class, char *buf, int len)
static inline
char *_make_filename(struct say_channel *ch, int class, int transact, int add_tmp)
{
char *filename = kmalloc(1024, GFP_KERNEL);
if (likely(filename)) {
snprintf(filename, 1023, "%s/%d.%s.%s%s", ch->ch_name, class, say_class[class], transact ? "status" : "log", add_tmp ? ".tmp" : "");
char *filename;
restart:
filename = kmalloc(1024, GFP_KERNEL);
if (unlikely(!filename)) {
schedule();
goto restart;
}
snprintf(filename, 1023, "%s/%d.%s.%s%s", ch->ch_name, class, say_class[class], transact ? "status" : "log", add_tmp ? ".tmp" : "");
return filename;
}