From ed88b59465950be79de1bd1363e0376e012c53e8 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Mon, 14 May 2018 15:50:52 -0700 Subject: [PATCH] UPSTREAM: pstore: Convert internal records to timespec64 This prepares pstore for converting the VFS layer to timespec64. Change-Id: Id2dfb977f0e3d41a935eb03344555eeace394875 Signed-off-by: Kees Cook Signed-off-by: Deepa Dinamani Signed-off-by: Naveen <133593113+elohim-etz@users.noreply.github.com> --- drivers/firmware/efi/efi-pstore.c | 27 ++++++++++++++------------- fs/pstore/inode.c | 3 ++- fs/pstore/platform.c | 2 +- fs/pstore/ram.c | 21 ++++++++++++++------- include/linux/pstore.h | 2 +- 5 files changed, 32 insertions(+), 23 deletions(-) diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c index 4277147f7140..0f7d97917197 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]; @@ -326,15 +327,15 @@ 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 792537341c36..1ff5e3a3b64a 100755 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -399,7 +399,8 @@ 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 204dec69a804..66cc20d55dc1 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -491,7 +491,7 @@ 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 cf7b82d79b97..980d5330b3e2 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -44,6 +44,11 @@ #endif #define memcpy memcpy_toio #endif +#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); @@ -171,21 +176,23 @@ 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; @@ -384,7 +391,7 @@ 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 70913ec87785..de9093d6e660 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;