diff options
Diffstat (limited to 'fs/pstore/ram.c')
| -rw-r--r-- | fs/pstore/ram.c | 47 |
1 files changed, 34 insertions, 13 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index a6119f9469e2..fa8cef2cca3a 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -131,9 +131,31 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max, return prz; } +static void ramoops_read_kmsg_hdr(char *buffer, struct timespec *time, + bool *compressed) +{ + char data_type; + + if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%lu.%lu-%c\n", + &time->tv_sec, &time->tv_nsec, &data_type) == 3) { + if (data_type == 'C') + *compressed = true; + else + *compressed = false; + } else if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%lu.%lu\n", + &time->tv_sec, &time->tv_nsec) == 2) { + *compressed = false; + } else { + time->tv_sec = 0; + time->tv_nsec = 0; + *compressed = false; + } +} + static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, int *count, struct timespec *time, - char **buf, struct pstore_info *psi) + char **buf, bool *compressed, + struct pstore_info *psi) { ssize_t size; ssize_t ecc_notice_size; @@ -152,10 +174,6 @@ static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, if (!prz) return 0; - /* TODO(kees): Bogus time for the moment. */ - time->tv_sec = 0; - time->tv_nsec = 0; - size = persistent_ram_old_size(prz); /* ECC correction notice */ @@ -166,12 +184,14 @@ static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, return -ENOMEM; memcpy(*buf, persistent_ram_old(prz), size); + ramoops_read_kmsg_hdr(*buf, time, compressed); persistent_ram_ecc_string(prz, *buf + size, ecc_notice_size + 1); return size + ecc_notice_size; } -static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz) +static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz, + bool compressed) { char *hdr; struct timespec timestamp; @@ -182,8 +202,9 @@ static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz) timestamp.tv_sec = 0; timestamp.tv_nsec = 0; } - hdr = kasprintf(GFP_ATOMIC, RAMOOPS_KERNMSG_HDR "%lu.%lu\n", - (long)timestamp.tv_sec, (long)(timestamp.tv_nsec / 1000)); + hdr = kasprintf(GFP_ATOMIC, RAMOOPS_KERNMSG_HDR "%lu.%lu-%c\n", + (long)timestamp.tv_sec, (long)(timestamp.tv_nsec / 1000), + compressed ? 'C' : 'D'); WARN_ON_ONCE(!hdr); len = hdr ? strlen(hdr) : 0; persistent_ram_write(prz, hdr, len); @@ -196,7 +217,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, unsigned int part, const char *buf, - size_t hsize, size_t size, + bool compressed, size_t size, struct pstore_info *psi) { struct ramoops_context *cxt = psi->data; @@ -242,7 +263,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, prz = cxt->przs[cxt->dump_write_cnt]; - hlen = ramoops_write_kmsg_hdr(prz); + hlen = ramoops_write_kmsg_hdr(prz, compressed); if (size + hlen > prz->buffer_size) size = prz->buffer_size - hlen; persistent_ram_write(prz, buf, size); @@ -400,11 +421,11 @@ static int ramoops_probe(struct platform_device *pdev) goto fail_out; } - if (!is_power_of_2(pdata->record_size)) + if (pdata->record_size && !is_power_of_2(pdata->record_size)) pdata->record_size = rounddown_pow_of_two(pdata->record_size); - if (!is_power_of_2(pdata->console_size)) + if (pdata->console_size && !is_power_of_2(pdata->console_size)) pdata->console_size = rounddown_pow_of_two(pdata->console_size); - if (!is_power_of_2(pdata->ftrace_size)) + if (pdata->ftrace_size && !is_power_of_2(pdata->ftrace_size)) pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size); cxt->dump_read_cnt = 0; |