diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index e4d9d24eb73dda047655ac018ed45b6259effedb..6d894bfd8b8fe8d7aa8f22642a42aa26ce9a68eb 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -931,14 +931,14 @@ static int erst_check_table(struct acpi_table_erst *erst_tab)
static int erst_open_pstore(struct pstore_info *psi);
static int erst_close_pstore(struct pstore_info *psi);
-static ssize_t erst_reader(u64 *id, enum pstore_type_id *type,
+static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, int *count,
struct timespec *time, char **buf,
struct pstore_info *psi);
static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
- u64 *id, unsigned int part,
+ u64 *id, unsigned int part, int count,
size_t size, struct pstore_info *psi);
-static int erst_clearer(enum pstore_type_id type, u64 id,
- struct pstore_info *psi);
+static int erst_clearer(enum pstore_type_id type, u64 id, int count,
+ struct timespec time, struct pstore_info *psi);
static struct pstore_info erst_info = {
.owner = THIS_MODULE,
@@ -987,7 +987,7 @@ static int erst_close_pstore(struct pstore_info *psi)
return 0;
}
-static ssize_t erst_reader(u64 *id, enum pstore_type_id *type,
+static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, int *count,
struct timespec *time, char **buf,
struct pstore_info *psi)
{
@@ -1055,7 +1055,7 @@ out:
}
static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
- u64 *id, unsigned int part,
+ u64 *id, unsigned int part, int count,
size_t size, struct pstore_info *psi)
{
struct cper_pstore_record *rcd = (struct cper_pstore_record *)
@@ -1101,8 +1101,8 @@ static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
return ret;
}
-static int erst_clearer(enum pstore_type_id type, u64 id,
- struct pstore_info *psi)
+static int erst_clearer(enum pstore_type_id type, u64 id, int count,
+ struct timespec time, struct pstore_info *psi)
{
return erst_clear(id);
}
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index d10c9873dd9a8684d7137e49245afc9b40d13d60..6e51c1e81f143bd8f44abe1b01bb1915fb584e93 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -658,13 +658,14 @@ static int efi_pstore_close(struct pstore_info *psi)
}
static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
- struct timespec *timespec,
+ int *count, struct timespec *timespec,
char **buf, struct pstore_info *psi)
{
efi_guid_t vendor = LINUX_EFI_CRASH_GUID;
struct efivars *efivars = psi->data;
char name[DUMP_NAME_LEN];
int i;
+ int cnt;
unsigned int part, size;
unsigned long time;
@@ -674,21 +675,41 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
for (i = 0; i < DUMP_NAME_LEN; i++) {
name[i] = efivars->walk_entry->var.VariableName[i];
}
- if (sscanf(name, "dump-type%u-%u-%lu", type, &part, &time) == 3) {
+ if (sscanf(name, "dump-type%u-%u-%d-%lu",
+ type, &part, &cnt, &time) == 4) {
+ *id = part;
+ *count = cnt;
+ timespec->tv_sec = time;
+ timespec->tv_nsec = 0;
+ } else if (sscanf(name, "dump-type%u-%u-%lu",
+ type, &part, &time) == 3) {
+ /*
+ * Check if an old format,
+ * which doesn't support holding
+ * multiple logs, remains.
+ */
*id = part;
+ *count = 0;
timespec->tv_sec = time;
timespec->tv_nsec = 0;
- get_var_data_locked(efivars, &efivars->walk_entry->var);
- size = efivars->walk_entry->var.DataSize;
- *buf = kmalloc(size, GFP_KERNEL);
- if (*buf == NULL)
- return -ENOMEM;
- memcpy(*buf, efivars->walk_entry->var.Data,
- size);
- efivars->walk_entry = list_entry(efivars->walk_entry->list.next,
- struct efivar_entry, list);
- return size;
+ } else {
+ efivars->walk_entry = list_entry(
+ efivars->walk_entry->list.next,
+ struct efivar_entry, list);
+ continue;
}
+
+ get_var_data_locked(efivars, &efivars->walk_entry->var);
+ size = efivars->walk_entry->var.DataSize;
+ *buf = kmalloc(size, GFP_KERNEL);
+ if (*buf == NULL)
+ return -ENOMEM;
+ memcpy(*buf, efivars->walk_entry->var.Data,
+ size);
+ efivars->walk_entry = list_entry(
+ efivars->walk_entry->list.next,
+ struct efivar_entry, list);
+ return size;
}
efivars->walk_entry = list_entry(efivars->walk_entry->list.next,
struct efivar_entry, list);
@@ -698,26 +719,77 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
static int efi_pstore_write(enum pstore_type_id type,
enum kmsg_dump_reason reason, u64 *id,
- unsigned int part, size_t size, struct pstore_info *psi)
+ unsigned int part, int count, size_t size,
+ struct pstore_info *psi)
{
char name[DUMP_NAME_LEN];
- char stub_name[DUMP_NAME_LEN];
efi_char16_t efi_name[DUMP_NAME_LEN];
efi_guid_t vendor = LINUX_EFI_CRASH_GUID;
struct efivars *efivars = psi->data;
- struct efivar_entry *entry, *found = NULL;
int i, ret = 0;
+ u64 storage_space, remaining_space, max_variable_size;
+ efi_status_t status = EFI_NOT_FOUND;
+
+ spin_lock(&efivars->lock);
+
+ /*
+ * Check if there is a space enough to log.
+ * size: a size of logging data
+ * DUMP_NAME_LEN * 2: a maximum size of variable name
+ */
+ status = efivars->ops->query_variable_info(PSTORE_EFI_ATTRIBUTES,
+ &storage_space,
+ &remaining_space,
+ &max_variable_size);
+ if (status || remaining_space < size + DUMP_NAME_LEN * 2) {
+ spin_unlock(&efivars->lock);
+ *id = part;
+ return -ENOSPC;
+ }
+
+ sprintf(name, "dump-type%u-%u-%d-%lu", type, part, count,
+ get_seconds());
+
+ for (i = 0; i < DUMP_NAME_LEN; i++)
+ efi_name[i] = name[i];
+
+ efivars->ops->set_variable(efi_name, &vendor, PSTORE_EFI_ATTRIBUTES,
+ size, psi->buf);
+
+ spin_unlock(&efivars->lock);
+
+ if (size)
+ ret = efivar_create_sysfs_entry(efivars,
+ utf16_strsize(efi_name,
+ DUMP_NAME_LEN * 2),
+ efi_name, &vendor);
+
+ *id = part;
+ return ret;
+};
+
+static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count,
+ struct timespec time, struct pstore_info *psi)
+{
+ char name[DUMP_NAME_LEN];
+ efi_char16_t efi_name[DUMP_NAME_LEN];
+ char name_old[DUMP_NAME_LEN];
+ efi_char16_t efi_name_old[DUMP_NAME_LEN];
+ efi_guid_t vendor = LINUX_EFI_CRASH_GUID;
+ struct efivars *efivars = psi->data;
+ struct efivar_entry *entry, *found = NULL;
+ int i;
- sprintf(stub_name, "dump-type%u-%u-", type, part);
- sprintf(name, "%s%lu", stub_name, get_seconds());
+ sprintf(name, "dump-type%u-%u-%d-%lu", type, (unsigned int)id, count,
+ time.tv_sec);
spin_lock(&efivars->lock);
for (i = 0; i < DUMP_NAME_LEN; i++)
- efi_name[i] = stub_name[i];
+ efi_name[i] = name[i];
/*
- * Clean up any entries with the same name
+ * Clean up an entry with the same name
*/
list_for_each_entry(entry, &efivars->list, list) {
@@ -726,11 +798,22 @@ static int efi_pstore_write(enum pstore_type_id type,
if (efi_guidcmp(entry->var.VendorGuid, vendor))
continue;
if (utf16_strncmp(entry->var.VariableName, efi_name,
- utf16_strlen(efi_name)))
- continue;
- /* Needs to be a prefix */
- if (entry->var.VariableName[utf16_strlen(efi_name)] == 0)
- continue;
+ utf16_strlen(efi_name))) {
+ /*
+ * Check if an old format,
+ * which doesn't support holding
+ * multiple logs, remains.
+ */
+ sprintf(name_old, "dump-type%u-%u-%lu", type,
+ (unsigned int)id, time.tv_sec);
+
+ for (i = 0; i < DUMP_NAME_LEN; i++)
+ efi_name_old[i] = name_old[i];
+
+ if (utf16_strncmp(entry->var.VariableName, efi_name_old,
+ utf16_strlen(efi_name_old)))
+ continue;
+ }
/* found */
found = entry;
@@ -738,37 +821,17 @@ static int efi_pstore_write(enum pstore_type_id type,
&entry->var.VendorGuid,
PSTORE_EFI_ATTRIBUTES,
0, NULL);
+ break;
}
if (found)
list_del(&found->list);
- for (i = 0; i < DUMP_NAME_LEN; i++)
- efi_name[i] = name[i];
-
- efivars->ops->set_variable(efi_name, &vendor, PSTORE_EFI_ATTRIBUTES,
- size, psi->buf);
-
spin_unlock(&efivars->lock);
if (found)
efivar_unregister(found);
- if (size)
- ret = efivar_create_sysfs_entry(efivars,
- utf16_strsize(efi_name,
- DUMP_NAME_LEN * 2),
- efi_name, &vendor);
-
- *id = part;
- return ret;
-};
-
-static int efi_pstore_erase(enum pstore_type_id type, u64 id,
- struct pstore_info *psi)
-{
- efi_pstore_write(type, 0, &id, (unsigned int)id, 0, psi);
-
return 0;
}
#else
@@ -782,7 +845,7 @@ static int efi_pstore_close(struct pstore_info *psi)
return 0;
}
-static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
+static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type, int *count,
struct timespec *timespec,
char **buf, struct pstore_info *psi)
{
@@ -791,13 +854,14 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
static int efi_pstore_write(enum pstore_type_id type,
enum kmsg_dump_reason reason, u64 *id,
- unsigned int part, size_t size, struct pstore_info *psi)
+ unsigned int part, int count, size_t size,
+ struct pstore_info *psi)
{
return 0;
}
-static int efi_pstore_erase(enum pstore_type_id type, u64 id,
- struct pstore_info *psi)
+static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count,
+ struct timespec time, struct pstore_info *psi)
{
return 0;
}
@@ -1237,6 +1301,7 @@ efivars_init(void)
ops.get_variable = efi.get_variable;
ops.set_variable = efi.set_variable;
ops.get_next_variable = efi.get_next_variable;
+ ops.query_variable_info = efi.query_variable_info;
error = register_efivars(&__efivars, &ops, efi_kobj);
if (error)
goto err_put;
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 4ab572e6d27782ad40efcdaff5e279b5e4c15daa..ed1d8c7212da6cdb8911d1fbd6784d499a450b90 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -49,6 +49,7 @@ struct pstore_private {
struct pstore_info *psi;
enum pstore_type_id type;
u64 id;
+ int count;
ssize_t size;
char data[];
};
@@ -175,7 +176,8 @@ static int pstore_unlink(struct inode *dir, struct dentry *dentry)
struct pstore_private *p = dentry->d_inode->i_private;
if (p->psi->erase)
- p->psi->erase(p->type, p->id, p->psi);
+ p->psi->erase(p->type, p->id, p->count,
+ dentry->d_inode->i_ctime, p->psi);
return simple_unlink(dir, dentry);
}
@@ -270,7 +272,7 @@ int pstore_is_mounted(void)
* Load it up with "size" bytes of data from "buf".
* Set the mtime & ctime to the date that this record was originally stored.
*/
-int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id,
+int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
char *data, size_t size, struct timespec time,
struct pstore_info *psi)
{
@@ -306,6 +308,7 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id,
goto fail_alloc;
private->type = type;
private->id = id;
+ private->count = count;
private->psi = psi;
switch (type) {
diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h
index 4847f588b7d5079df974c42a2f7324615e477aca..937d820f273c2b17c5b47aa365f230970b19cc32 100644
--- a/fs/pstore/internal.h
+++ b/fs/pstore/internal.h
@@ -50,7 +50,7 @@ extern struct pstore_info *psinfo;
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,
- char *data, size_t size,
+ int count, char *data, size_t size,
struct timespec time, struct pstore_info *psi);
extern int pstore_is_mounted(void);
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 947fbe06c3b1f2ed0948b8fb050b43f2c48ff591..5ea2e77ff023f8a4060c071ab733f419b1cabc03 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -136,7 +136,7 @@ static void pstore_dump(struct kmsg_dumper *dumper,
break;
ret = psinfo->write(PSTORE_TYPE_DMESG, reason, &id, part,
- hsize + len, psinfo);
+ oopscount, hsize + len, psinfo);
if (ret == 0 && reason == KMSG_DUMP_OOPS && pstore_is_mounted())
pstore_new_entry = 1;
@@ -173,7 +173,7 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c)
spin_lock_irqsave(&psinfo->buf_lock, flags);
}
memcpy(psinfo->buf, s, c);
- psinfo->write(PSTORE_TYPE_CONSOLE, 0, &id, 0, c, psinfo);
+ psinfo->write(PSTORE_TYPE_CONSOLE, 0, &id, 0, 0, c, psinfo);
spin_unlock_irqrestore(&psinfo->buf_lock, flags);
s += c;
c = e - s;
@@ -197,7 +197,7 @@ static void pstore_register_console(void) {}
static int pstore_write_compat(enum pstore_type_id type,
enum kmsg_dump_reason reason,
- u64 *id, unsigned int part,
+ u64 *id, unsigned int part, int count,
size_t size, struct pstore_info *psi)
{
return psi->write_buf(type, reason, id, part, psinfo->buf, size, psi);
@@ -267,6 +267,7 @@ void pstore_get_records(int quiet)
char *buf = NULL;
ssize_t size;
u64 id;
+ int count;
enum pstore_type_id type;
struct timespec time;
int failed = 0, rc;
@@ -278,9 +279,9 @@ void pstore_get_records(int quiet)
if (psi->open && psi->open(psi))
goto out;
- while ((size = psi->read(&id, &type, &time, &buf, psi)) > 0) {
- rc = pstore_mkfile(type, psi->name, id, buf, (size_t)size,
- time, psi);
+ while ((size = psi->read(&id, &type, &count, &time, &buf, psi)) > 0) {
+ rc = pstore_mkfile(type, psi->name, id, count, buf,
+ (size_t)size, time, psi);
kfree(buf);
buf = NULL;
if (rc && (rc != -EEXIST || !quiet))
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 1a4f6da58eab4018878aab4275e1d3b6f3309b37..2bfa36e0ffe8d464dde8b74c37c91c46d16d49ae 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -132,9 +132,8 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
}
static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type,
- struct timespec *time,
- char **buf,
- struct pstore_info *psi)
+ int *count, struct timespec *time,
+ char **buf, struct pstore_info *psi)
{
ssize_t size;
struct ramoops_context *cxt = psi->data;
@@ -236,8 +235,8 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type,
return 0;
}
-static int ramoops_pstore_erase(enum pstore_type_id type, u64 id,
- struct pstore_info *psi)
+static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, int count,
+ struct timespec time, struct pstore_info *psi)
{
struct ramoops_context *cxt = psi->data;
struct persistent_ram_zone *prz;
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 8670eb1eb8cd27aea69ad00c6b08328e65b7ed79..c47ec36f3f39cc71e53420e9e9433b181780f680 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -643,6 +643,7 @@ struct efivar_operations {
efi_get_variable_t *get_variable;
efi_get_next_variable_t *get_next_variable;
efi_set_variable_t *set_variable;
+ efi_query_variable_info_t *query_variable_info;
};
struct efivars {
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index ee3034a408847153c664b20051874066d2150b05..1788909d9a99fdc22dbe83b83cd928fec421ad4c 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -50,16 +50,18 @@ 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,
- struct timespec *time, char **buf,
+ int *count, struct timespec *time, char **buf,
struct pstore_info *psi);
int (*write)(enum pstore_type_id type,
enum kmsg_dump_reason reason, u64 *id,
- unsigned int part, size_t size, struct pstore_info *psi);
+ unsigned int part, int count, size_t size,
+ struct pstore_info *psi);
int (*write_buf)(enum pstore_type_id type,
enum kmsg_dump_reason reason, u64 *id,
unsigned int part, const char *buf, size_t size,
struct pstore_info *psi);
int (*erase)(enum pstore_type_id type, u64 id,
+ int count, struct timespec time,
struct pstore_info *psi);
void *data;
};