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pstore: cleanups to pstore_dump()

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pstore_dump() can be called with many different "reason" codes. Save
the name of the code in the persistent store record.

Also - only worthwhile calling pstore_mkfile for KMSG_DUMP_OOPS - that
is the only one where the kernel will continue running.

Reviewed-by: Seiji Aguchi <seiji.aguchi@hds.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Tony Luck 2011-03-22 16:01:49 -07:00
parent eddecbb601
commit 9f6af27fb6
1 changed files with 12 additions and 3 deletions
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15
fs/pstore/platform.c
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@ -48,6 +48,10 @@ void pstore_set_kmsg_bytes(int bytes)
/* Tag each group of saved records with a sequence number */
static int oopscount;
static char *reason_str[] = {
"Oops", "Panic", "Kexec", "Restart", "Halt", "Poweroff", "Emergency"
};
/*
* callback from kmsg_dump. (s2,l2) has the most recently
* written bytes, older bytes are in (s1,l1). Save as much
@ -61,15 +65,20 @@ static void pstore_dump(struct kmsg_dumper *dumper,
unsigned long s1_start, s2_start;
unsigned long l1_cpy, l2_cpy;
unsigned long size, total = 0;
char *dst;
char *dst, *why;
u64 id;
int hsize, part = 1;
if (reason < ARRAY_SIZE(reason_str))
why = reason_str[reason];
else
why = "Unknown";
mutex_lock(&psinfo->buf_mutex);
oopscount++;
while (total < kmsg_bytes) {
dst = psinfo->buf;
hsize = sprintf(dst, "Oops#%d Part%d\n", oopscount, part++);
hsize = sprintf(dst, "%s#%d Part%d\n", why, oopscount, part++);
size = psinfo->bufsize - hsize;
dst += hsize;
@ -86,7 +95,7 @@ static void pstore_dump(struct kmsg_dumper *dumper,
memcpy(dst + l1_cpy, s2 + s2_start, l2_cpy);
id = psinfo->write(PSTORE_TYPE_DMESG, hsize + l1_cpy + l2_cpy);
if (pstore_is_mounted())
if (reason == KMSG_DUMP_OOPS && pstore_is_mounted())
pstore_mkfile(PSTORE_TYPE_DMESG, psinfo->name, id,
psinfo->buf, hsize + l1_cpy + l2_cpy,
CURRENT_TIME, psinfo->erase);