[RFC 09/32] fs/pstore: convert to struct inode_time

Arnd Bergmann
2014-05-30T20:05:15Z

pstore uses timestamps encoded in a string as seconds, but on 32-bit systems
cannot go beyond year 2038 because of the limits of struct timespec.

This converts the pstore code to use the new struct inode_time for timestamps.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tony Luck <tony.luck@intel.com>
---
drivers/firmware/efi/efi-pstore.c | 28 ++++++++++++++--------------
fs/pstore/inode.c | 2 +-
fs/pstore/internal.h | 2 +-
fs/pstore/platform.c | 2 +-
fs/pstore/ram.c | 18 ++++++++++--------
include/linux/pstore.h | 4 ++--
6 files changed, 29 insertions(+), 27 deletions(-)

diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c
index 4b9dc83..a1e4153 100644
--- a/drivers/firmware/efi/efi-pstore.c
+++ b/drivers/firmware/efi/efi-pstore.c
@@ -32,7 +32,7 @@ struct pstore_read_data {
u64 *id;
enum pstore_type_id *type;
int *count;
- struct timespec *timespec;
+ struct inode_time *inode_time;
bool *compressed;
char **buf;
};
@@ -63,8 +63,8 @@ static int efi_pstore_read_func(struct efivar_entry *entry, void *data)
cb_data->type, &part, &cnt, &time, &data_type) == 5) {
*cb_data->id = generic_id(time, part, cnt);
*cb_data->count = cnt;
- cb_data->timespec->tv_sec = time;
- cb_data->timespec->tv_nsec = 0;
+ cb_data->inode_time->tv_sec = time;
+ cb_data->inode_time->tv_nsec = 0;
if (data_type == 'C')
*cb_data->compressed = true;
else
@@ -73,8 +73,8 @@ static int efi_pstore_read_func(struct efivar_entry *entry, void *data)
cb_data->type, &part, &cnt, &time) == 4) {
*cb_data->id = generic_id(time, part, cnt);
*cb_data->count = cnt;
- cb_data->timespec->tv_sec = time;
- cb_data->timespec->tv_nsec = 0;
+ cb_data->inode_time->tv_sec = time;
+ cb_data->inode_time->tv_nsec = 0;
*cb_data->compressed = false;
} else if (sscanf(name, "dump-type%u-%u-%lu",
cb_data->type, &part, &time) == 3) {
@@ -85,8 +85,8 @@ static int efi_pstore_read_func(struct efivar_entry *entry, void *data)
*/
*cb_data->id = generic_id(time, part, 0);
*cb_data->count = 0;
- cb_data->timespec->tv_sec = time;
- cb_data->timespec->tv_nsec = 0;
+ cb_data->inode_time->tv_sec = time;
+ cb_data->inode_time->tv_nsec = 0;
*cb_data->compressed = false;
} else
return 0;
@@ -208,7 +208,7 @@ static int efi_pstore_sysfs_entry_iter(void *data, struct efivar_entry **pos)
* and pstore will stop reading entry.
*/
static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
- int *count, struct timespec *timespec,
+ int *count, struct inode_time *inode_time,
char **buf, bool *compressed,
struct pstore_info *psi)
{
@@ -218,7 +218,7 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
data.id = id;
data.type = type;
data.count = count;
- data.timespec = timespec;
+ data.inode_time = inode_time;
data.compressed = compressed;
data.buf = buf;

@@ -266,7 +266,7 @@ struct pstore_erase_data {
u64 id;
enum pstore_type_id type;
int count;
- struct timespec time;
+ struct inode_time time;
efi_char16_t *name;
};

@@ -292,8 +292,8 @@ static int efi_pstore_erase_func(struct efivar_entry *entry, void *data)
* Check if an old format, which doesn't support
* holding multiple logs, remains.
*/
- sprintf(name_old, "dump-type%u-%u-%lu", ed->type,
- (unsigned int)ed->id, ed->time.tv_sec);
+ sprintf(name_old, "dump-type%u-%u-%llu", ed->type,
+ (unsigned int)ed->id, (u64)ed->time.tv_sec);

for (i = 0; i < DUMP_NAME_LEN; i++)
efi_name_old[i] = name_old[i];
@@ -319,7 +319,7 @@ static int efi_pstore_erase_func(struct efivar_entry *entry, void *data)
}

static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count,
- struct timespec time, struct pstore_info *psi)
+ struct inode_time time, struct pstore_info *psi)
{
struct pstore_erase_data edata;
struct efivar_entry *entry = NULL;
@@ -330,7 +330,7 @@ static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count,

do_div(id, 1000);
part = do_div(id, 100);
- sprintf(name, "dump-type%u-%u-%d-%lu", type, part, count, time.tv_sec);
+ sprintf(name, "dump-type%u-%u-%d-%llu", type, part, count, (u64)time.tv_sec);

for (i = 0; i < DUMP_NAME_LEN; i++)
efi_name[i] = name[i];
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 192297b..6f3925f 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -277,7 +277,7 @@ int pstore_is_mounted(void)
*/
int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
char *data, bool compressed, size_t size,
- struct timespec time, struct pstore_info *psi)
+ struct inode_time time, struct pstore_info *psi)
{
struct dentry *root = pstore_sb->s_root;
struct dentry *dentry;
diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h
index 3b3d305..eb9c4eb 100644
--- a/fs/pstore/internal.h
+++ b/fs/pstore/internal.h
@@ -51,7 +51,7 @@ extern void pstore_set_kmsg_bytes(int);
extern void pstore_get_records(int);
extern int pstore_mkfile(enum pstore_type_id, char *psname, u64 id,
int count, char *data, bool compressed,
- size_t size, struct timespec time,
+ size_t size, struct inode_time time,
struct pstore_info *psi);
extern int pstore_is_mounted(void);

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 0a9b72c..06f2628 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -475,7 +475,7 @@ void pstore_get_records(int quiet)
u64 id;
int count;
enum pstore_type_id type;
- struct timespec time;
+ struct inode_time time;
int failed = 0, rc;
bool compressed;
int unzipped_len = -1;
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 3b57443..50d7298 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -135,29 +135,31 @@ 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,
+static void ramoops_read_kmsg_hdr(char *buffer, struct inode_time *time,
bool *compressed)
{
char data_type;
+ u64 seconds;

- if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%lu.%lu-%c\n",
- &time->tv_sec, &time->tv_nsec, &data_type) == 3) {
+ if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%llu.%lu-%c\n",
+ &seconds, &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) {
+ } else if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%llu.%lu\n",
+ &seconds, &time->tv_nsec) == 2) {
*compressed = false;
} else {
- time->tv_sec = 0;
+ seconds = 0;
time->tv_nsec = 0;
*compressed = false;
}
+ time->tv_sec = seconds;
}

static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type,
- int *count, struct timespec *time,
+ int *count, struct inode_time *time,
char **buf, bool *compressed,
struct pstore_info *psi)
{
@@ -278,7 +280,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
}

static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, int count,
- struct timespec time, struct pstore_info *psi)
+ struct inode_time time, struct pstore_info *psi)
{
struct ramoops_context *cxt = psi->data;
struct persistent_ram_zone *prz;
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index ece0c6b..f293905 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -55,7 +55,7 @@ struct pstore_info {
int (*open)(struct pstore_info *psi);
int (*close)(struct pstore_info *psi);
ssize_t (*read)(u64 *id, enum pstore_type_id *type,
- int *count, struct timespec *time, char **buf,
+ int *count, struct inode_time *time, char **buf,
bool *compressed, struct pstore_info *psi);
int (*write)(enum pstore_type_id type,
enum kmsg_dump_reason reason, u64 *id,
@@ -66,7 +66,7 @@ struct pstore_info {
unsigned int part, const char *buf, bool compressed,
size_t size, struct pstore_info *psi);
int (*erase)(enum pstore_type_id type, u64 id,
- int count, struct timespec time,
+ int count, struct inode_time time,
struct pstore_info *psi);
void *data;
};
--
1.8.3.2