Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
pstore: cleanups to pstore_dump()
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>
+12
-3
fs/pstore/platform.c
+12
-3
fs/pstore/platform.c
···
48
/* Tag each group of saved records with a sequence number */
49
static int oopscount;
50
51
/*
52
* callback from kmsg_dump. (s2,l2) has the most recently
53
* written bytes, older bytes are in (s1,l1). Save as much
···
65
unsigned long s1_start, s2_start;
66
unsigned long l1_cpy, l2_cpy;
67
unsigned long size, total = 0;
68
-
char *dst;
69
u64 id;
70
int hsize, part = 1;
71
72
mutex_lock(&psinfo->buf_mutex);
73
oopscount++;
74
while (total < kmsg_bytes) {
75
dst = psinfo->buf;
76
-
hsize = sprintf(dst, "Oops#%d Part%d\n", oopscount, part++);
77
size = psinfo->bufsize - hsize;
78
dst += hsize;
79
···
95
memcpy(dst + l1_cpy, s2 + s2_start, l2_cpy);
96
97
id = psinfo->write(PSTORE_TYPE_DMESG, hsize + l1_cpy + l2_cpy);
98
-
if (pstore_is_mounted())
99
pstore_mkfile(PSTORE_TYPE_DMESG, psinfo->name, id,
100
psinfo->buf, hsize + l1_cpy + l2_cpy,
101
CURRENT_TIME, psinfo->erase);
···
48
/* Tag each group of saved records with a sequence number */
49
static int oopscount;
50
51
+
static char *reason_str[] = {
52
+
"Oops", "Panic", "Kexec", "Restart", "Halt", "Poweroff", "Emergency"
53
+
};
54
+
55
/*
56
* callback from kmsg_dump. (s2,l2) has the most recently
57
* written bytes, older bytes are in (s1,l1). Save as much
···
61
unsigned long s1_start, s2_start;
62
unsigned long l1_cpy, l2_cpy;
63
unsigned long size, total = 0;
64
+
char *dst, *why;
65
u64 id;
66
int hsize, part = 1;
67
+
68
+
if (reason < ARRAY_SIZE(reason_str))
69
+
why = reason_str[reason];
70
+
else
71
+
why = "Unknown";
72
73
mutex_lock(&psinfo->buf_mutex);
74
oopscount++;
75
while (total < kmsg_bytes) {
76
dst = psinfo->buf;
77
+
hsize = sprintf(dst, "%s#%d Part%d\n", why, oopscount, part++);
78
size = psinfo->bufsize - hsize;
79
dst += hsize;
80
···
86
memcpy(dst + l1_cpy, s2 + s2_start, l2_cpy);
87
88
id = psinfo->write(PSTORE_TYPE_DMESG, hsize + l1_cpy + l2_cpy);
89
+
if (reason == KMSG_DUMP_OOPS && pstore_is_mounted())
90
pstore_mkfile(PSTORE_TYPE_DMESG, psinfo->name, id,
91
psinfo->buf, hsize + l1_cpy + l2_cpy,
92
CURRENT_TIME, psinfo->erase);