pstore: Convert internal records to timespec64

This prepares pstore for converting the VFS layer to timespec64.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>

5 files changed, 32 insertions, 23 deletions

diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c
index 5a0fa939d70f..cfe87b465819 100644
--- a/drivers/firmware/efi/efi-pstore.c
+++ b/drivers/firmware/efi/efi-pstore.c
@@ -28,10 +28,9 @@ static int efi_pstore_close(struct pstore_info *psi)
         return 0;
 }
 
-static inline u64 generic_id(unsigned long timestamp,
-                             unsigned int part, int count)
+static inline u64 generic_id(u64 timestamp, unsigned int part, int count)
 {
-        return ((u64) timestamp * 100 + part) * 1000 + count;
+        return (timestamp * 100 + part) * 1000 + count;
 }
 
 static int efi_pstore_read_func(struct efivar_entry *entry,
@@ -42,7 +41,8 @@ static int efi_pstore_read_func(struct efivar_entry *entry,
         int i;
         int cnt;
         unsigned int part;
-        unsigned long time, size;
+        unsigned long size;
+        u64 time;
 
         if (efi_guidcmp(entry->var.VendorGuid, vendor))
                 return 0;
@@ -50,7 +50,7 @@ static int efi_pstore_read_func(struct efivar_entry *entry,
         for (i = 0; i < DUMP_NAME_LEN; i++)
                 name[i] = entry->var.VariableName[i];
 
-        if (sscanf(name, "dump-type%u-%u-%d-%lu-%c",
+        if (sscanf(name, "dump-type%u-%u-%d-%llu-%c",
                    &record->type, &part, &cnt, &time, &data_type) == 5) {
                 record->id = generic_id(time, part, cnt);
                 record->part = part;
@@ -62,7 +62,7 @@ static int efi_pstore_read_func(struct efivar_entry *entry,
                 else
                         record->compressed = false;
                 record->ecc_notice_size = 0;
-        } else if (sscanf(name, "dump-type%u-%u-%d-%lu",
+        } else if (sscanf(name, "dump-type%u-%u-%d-%llu",
                    &record->type, &part, &cnt, &time) == 4) {
                 record->id = generic_id(time, part, cnt);
                 record->part = part;
@@ -71,7 +71,7 @@ static int efi_pstore_read_func(struct efivar_entry *entry,
                 record->time.tv_nsec = 0;
                 record->compressed = false;
                 record->ecc_notice_size = 0;
-        } else if (sscanf(name, "dump-type%u-%u-%lu",
+        } else if (sscanf(name, "dump-type%u-%u-%llu",
                           &record->type, &part, &time) == 3) {
                 /*
                  * Check if an old format,
@@ -250,9 +250,10 @@ static int efi_pstore_write(struct pstore_record *record)
         /* Since we copy the entire length of name, make sure it is wiped. */
         memset(name, 0, sizeof(name));
 
-        snprintf(name, sizeof(name), "dump-type%u-%u-%d-%lu-%c",
+        snprintf(name, sizeof(name), "dump-type%u-%u-%d-%lld-%c",
                  record->type, record->part, record->count,
-                 record->time.tv_sec, record->compressed ? 'C' : 'D');
+                 (long long)record->time.tv_sec,
+                 record->compressed ? 'C' : 'D');
 
         for (i = 0; i < DUMP_NAME_LEN; i++)
                 efi_name[i] = name[i];
@@ -327,15 +328,15 @@ static int efi_pstore_erase(struct pstore_record *record)
         char name[DUMP_NAME_LEN];
         int ret;
 
-        snprintf(name, sizeof(name), "dump-type%u-%u-%d-%lu",
+        snprintf(name, sizeof(name), "dump-type%u-%u-%d-%lld",
                  record->type, record->part, record->count,
-                 record->time.tv_sec);
+                 (long long)record->time.tv_sec);
         ret = efi_pstore_erase_name(name);
         if (ret != -ENOENT)
                 return ret;
 
-        snprintf(name, sizeof(name), "dump-type%u-%u-%lu",
-                record->type, record->part, record->time.tv_sec);
+        snprintf(name, sizeof(name), "dump-type%u-%u-%lld",
+                record->type, record->part, (long long)record->time.tv_sec);
         ret = efi_pstore_erase_name(name);
 
         return ret;
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 5fcb845b9fec..75afe5eb0574 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -392,7 +392,8 @@ int pstore_mkfile(struct dentry *root, struct pstore_record *record)
         inode->i_private = private;
 
         if (record->time.tv_sec)
-                inode->i_mtime = inode->i_ctime = record->time;
+                inode->i_mtime = inode->i_ctime =
+                        timespec64_to_timespec(record->time);
 
         d_add(dentry, inode);
 
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index dc720573fd53..c238ab8ba31d 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -328,7 +328,7 @@ void pstore_record_init(struct pstore_record *record,
         record->psi = psinfo;
 
         /* Report zeroed timestamp if called before timekeeping has resumed. */
-        record->time = ns_to_timespec(ktime_get_real_fast_ns());
+        record->time = ns_to_timespec64(ktime_get_real_fast_ns());
 }
 
 /*
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 49b2bc114868..69e893076ab7 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -38,6 +38,11 @@
 
 #define RAMOOPS_KERNMSG_HDR "===="
 #define MIN_MEM_SIZE 4096UL
+#if __BITS_PER_LONG == 64
+# define TVSEC_FMT "%ld"
+#else
+# define TVSEC_FMT "%lld"
+#endif
 
 static ulong record_size = MIN_MEM_SIZE;
 module_param(record_size, ulong, 0400);
@@ -153,21 +158,23 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
         return prz;
 }
 
-static int ramoops_read_kmsg_hdr(char *buffer, struct timespec *time,
+static int ramoops_read_kmsg_hdr(char *buffer, struct timespec64 *time,
                                   bool *compressed)
 {
         char data_type;
         int header_length = 0;
 
-        if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%lu.%lu-%c\n%n", &time->tv_sec,
-                        &time->tv_nsec, &data_type, &header_length) == 3) {
+        if (sscanf(buffer, RAMOOPS_KERNMSG_HDR TVSEC_FMT ".%lu-%c\n%n",
+                   &time->tv_sec, &time->tv_nsec, &data_type,
+                   &header_length) == 3) {
                 if (data_type == 'C')
                         *compressed = true;
                 else
                         *compressed = false;
-        } else if (sscanf(buffer, RAMOOPS_KERNMSG_HDR "%lu.%lu\n%n",
-                        &time->tv_sec, &time->tv_nsec, &header_length) == 2) {
-                        *compressed = false;
+        } else if (sscanf(buffer, RAMOOPS_KERNMSG_HDR TVSEC_FMT ".%lu\n%n",
+                          &time->tv_sec, &time->tv_nsec,
+                          &header_length) == 2) {
+                *compressed = false;
         } else {
                 time->tv_sec = 0;
                 time->tv_nsec = 0;
@@ -360,7 +367,7 @@ static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz,
         char *hdr;
         size_t len;
 
-        hdr = kasprintf(GFP_ATOMIC, RAMOOPS_KERNMSG_HDR "%lu.%lu-%c\n",
+        hdr = kasprintf(GFP_ATOMIC, RAMOOPS_KERNMSG_HDR TVSEC_FMT ".%lu-%c\n",
                 record->time.tv_sec,
                 record->time.tv_nsec / 1000,
                 record->compressed ? 'C' : 'D');
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index 61f806a7fe29..a15bc4d48752 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -71,7 +71,7 @@ struct pstore_record {
         struct pstore_info      *psi;
         enum pstore_type_id     type;
         u64                     id;
-        struct timespec         time;
+        struct timespec64       time;
         char                    *buf;
         ssize_t                 size;
         ssize_t                 ecc_notice_size;