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pstore: make pstore write function return normal success/fail value 

Currently pstore write interface employs record id as return
value, but it is not enough because it can't tell caller if
the write operation is successful. Pass the record id back via
an argument pointer and return zero for success, non-zero for
failure.

Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Chen Gong 2011-10-12 09:17:24 -07:00 committed by Tony Luck
parent abd4d5587b
commit b238b8fa93
4 changed files with 23 additions and 19 deletions
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10
drivers/acpi/apei/erst.c
View File

@ -933,7 +933,7 @@ 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,
struct timespec *time, struct pstore_info *psi);
static u64 erst_writer(enum pstore_type_id type, unsigned int part,
static int erst_writer(enum pstore_type_id type, u64 *id, unsigned int part,
size_t size, struct pstore_info *psi);
static int erst_clearer(enum pstore_type_id type, u64 id,
struct pstore_info *psi);
@ -1040,11 +1040,12 @@ out:
return (rc < 0) ? rc : (len - sizeof(*rcd));
}
static u64 erst_writer(enum pstore_type_id type, unsigned int part,
static int erst_writer(enum pstore_type_id type, u64 *id, unsigned int part,
size_t size, struct pstore_info *psi)
{
struct cper_pstore_record *rcd = (struct cper_pstore_record *)
(erst_info.buf - sizeof(*rcd));
int ret;
memset(rcd, 0, sizeof(*rcd));
memcpy(rcd->hdr.signature, CPER_SIG_RECORD, CPER_SIG_SIZE);
@ -1079,9 +1080,10 @@ static u64 erst_writer(enum pstore_type_id type, unsigned int part,
}
rcd->sec_hdr.section_severity = CPER_SEV_FATAL;
erst_write(&rcd->hdr);
ret = erst_write(&rcd->hdr);
*id = rcd->hdr.record_id;
return rcd->hdr.record_id;
return ret;
}
static int erst_clearer(enum pstore_type_id type, u64 id,

17
drivers/firmware/efivars.c
View File

@ -490,8 +490,8 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
return 0;
}
static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
size_t size, struct pstore_info *psi)
static int efi_pstore_write(enum pstore_type_id type, u64 *id,
unsigned int part, size_t size, struct pstore_info *psi)
{
char name[DUMP_NAME_LEN];
char stub_name[DUMP_NAME_LEN];
@ -499,7 +499,7 @@ static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
efi_guid_t vendor = LINUX_EFI_CRASH_GUID;
struct efivars *efivars = psi->data;
struct efivar_entry *entry, *found = NULL;
int i;
int i, ret = 0;
sprintf(stub_name, "dump-type%u-%u-", type, part);
sprintf(name, "%s%lu", stub_name, get_seconds());
@ -548,18 +548,19 @@ static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
efivar_unregister(found);
if (size)
efivar_create_sysfs_entry(efivars,
ret = efivar_create_sysfs_entry(efivars,
utf16_strsize(efi_name,
DUMP_NAME_LEN * 2),
efi_name, &vendor);
return part;
*id = part;
return ret;
};
static int efi_pstore_erase(enum pstore_type_id type, u64 id,
struct pstore_info *psi)
{
efi_pstore_write(type, id, 0, psi);
efi_pstore_write(type, &id, (unsigned int)id, 0, psi);
return 0;
}
@ -580,8 +581,8 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
return -1;
}
static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
size_t size, struct pstore_info *psi)
static int efi_pstore_write(enum pstore_type_id type, u64 *id,
unsigned int part, size_t size, struct pstore_info *psi)
{
return 0;
}

11
fs/pstore/platform.c
View File

@ -87,7 +87,7 @@ static void pstore_dump(struct kmsg_dumper *dumper,
unsigned long size, total = 0;
char *dst, *why;
u64 id;
int hsize;
int hsize, ret;
unsigned int part = 1;
unsigned long flags = 0;
int is_locked = 0;
@ -122,9 +122,9 @@ static void pstore_dump(struct kmsg_dumper *dumper,
memcpy(dst, s1 + s1_start, l1_cpy);
memcpy(dst + l1_cpy, s2 + s2_start, l2_cpy);
id = psinfo->write(PSTORE_TYPE_DMESG, part,
ret = psinfo->write(PSTORE_TYPE_DMESG, &id, part,
hsize + l1_cpy + l2_cpy, psinfo);
if (reason == KMSG_DUMP_OOPS && pstore_is_mounted())
if (ret == 0 && reason == KMSG_DUMP_OOPS && pstore_is_mounted())
pstore_new_entry = 1;
l1 -= l1_cpy;
l2 -= l2_cpy;
@ -247,6 +247,7 @@ static void pstore_timefunc(unsigned long dummy)
int pstore_write(enum pstore_type_id type, char *buf, size_t size)
{
u64 id;
int ret;
unsigned long flags;
if (!psinfo)
@ -257,8 +258,8 @@ int pstore_write(enum pstore_type_id type, char *buf, size_t size)
spin_lock_irqsave(&psinfo->buf_lock, flags);
memcpy(psinfo->buf, buf, size);
id = psinfo->write(type, 0, size, psinfo);
if (pstore_is_mounted())
ret = psinfo->write(type, &id, 0, size, psinfo);
if (ret == 0 && pstore_is_mounted())
pstore_mkfile(PSTORE_TYPE_DMESG, psinfo->name, id, psinfo->buf,
size, CURRENT_TIME, psinfo);
spin_unlock_irqrestore(&psinfo->buf_lock, flags);

4
include/linux/pstore.h
View File

@ -39,8 +39,8 @@ struct pstore_info {
int (*close)(struct pstore_info *psi);
ssize_t (*read)(u64 *id, enum pstore_type_id *type,
struct timespec *time, struct pstore_info *psi);
u64 (*write)(enum pstore_type_id type, unsigned int part,
size_t size, struct pstore_info *psi);
int (*write)(enum pstore_type_id type, u64 *id,
unsigned int part, size_t size, struct pstore_info *psi);
int (*erase)(enum pstore_type_id type, u64 id,
struct pstore_info *psi);
void *data;