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pstore: Replace arguments for write() API

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Similar to the pstore_info read() callback, there were too many arguments.
This switches to the new struct pstore_record pointer instead. This adds
"reason" and "part" to the record structure as well.

Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook
2017-03-03 23:28:53 -08:00
parent 125cc42baf
commit 76cc9580e3
5 changed files with 76 additions and 85 deletions
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62
fs/pstore/platform.c
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@@ -484,7 +484,6 @@ static void pstore_dump(struct kmsg_dumper *dumper,
{
unsigned long total = 0;
const char *why;
u64 id;
unsigned int part = 1;
unsigned long flags = 0;
int is_locked;
@@ -506,48 +505,59 @@ static void pstore_dump(struct kmsg_dumper *dumper,
oopscount++;
while (total < kmsg_bytes) {
char *dst;
unsigned long size;
int hsize;
size_t dst_size;
int header_size;
int zipped_len = -1;
size_t len;
bool compressed = false;
size_t total_len;
size_t dump_size;
struct pstore_record record = {
.type = PSTORE_TYPE_DMESG,
.count = oopscount,
.reason = reason,
.part = part,
.compressed = false,
.buf = psinfo->buf,
.psi = psinfo,
};
if (big_oops_buf && is_locked) {
dst = big_oops_buf;
size = big_oops_buf_sz;
dst_size = big_oops_buf_sz;
} else {
dst = psinfo->buf;
size = psinfo->bufsize;
dst_size = psinfo->bufsize;
}
hsize = sprintf(dst, "%s#%d Part%u\n", why, oopscount, part);
size -= hsize;
/* Write dump header. */
header_size = snprintf(dst, dst_size, "%s#%d Part%u\n", why,
oopscount, part);
dst_size -= header_size;
if (!kmsg_dump_get_buffer(dumper, true, dst + hsize,
size, &len))
/* Write dump contents. */
if (!kmsg_dump_get_buffer(dumper, true, dst + header_size,
dst_size, &dump_size))
break;
if (big_oops_buf && is_locked) {
zipped_len = pstore_compress(dst, psinfo->buf,
hsize + len, psinfo->bufsize);
header_size + dump_size,
psinfo->bufsize);
if (zipped_len > 0) {
compressed = true;
total_len = zipped_len;
record.compressed = true;
record.size = zipped_len;
} else {
total_len = copy_kmsg_to_buffer(hsize, len);
record.size = copy_kmsg_to_buffer(header_size,
dump_size);
}
} else {
total_len = hsize + len;
record.size = header_size + dump_size;
}
ret = psinfo->write(PSTORE_TYPE_DMESG, reason, &id, part,
oopscount, compressed, total_len, psinfo);
ret = psinfo->write(&record);
if (ret == 0 && reason == KMSG_DUMP_OOPS && pstore_is_mounted())
pstore_new_entry = 1;
total += total_len;
total += record.size;
part++;
}
if (is_locked)
@@ -618,14 +628,12 @@ static void pstore_register_console(void) {}
static void pstore_unregister_console(void) {}
#endif
static int pstore_write_compat(enum pstore_type_id type,
enum kmsg_dump_reason reason,
u64 *id, unsigned int part, int count,
bool compressed, size_t size,
struct pstore_info *psi)
static int pstore_write_compat(struct pstore_record *record)
{
return psi->write_buf(type, reason, id, part, psinfo->buf, compressed,
size, psi);
return record->psi->write_buf(record->type, record->reason,
&record->id, record->part,
psinfo->buf, record->compressed,
record->size, record->psi);
}
static int pstore_write_buf_user_compat(enum pstore_type_id type,