pstore: Add extra context for writes and erases
EFI only provides small amounts of individual storage, and conventionally puts metadata in the storage variable name. Rather than add a metadata header to the (already limited) variable storage, it's easier for us to modify pstore to pass all the information we need to construct a unique variable name to the appropriate functions. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
parent
638c1fd303
commit
56280682ce
|
@ -933,9 +933,10 @@ 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, size_t size,
|
||||
static u64 erst_writer(enum pstore_type_id type, int part, 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(u64 id, struct pstore_info *psi);
|
||||
|
||||
static struct pstore_info erst_info = {
|
||||
.owner = THIS_MODULE,
|
||||
|
@ -1039,7 +1040,7 @@ out:
|
|||
return (rc < 0) ? rc : (len - sizeof(*rcd));
|
||||
}
|
||||
|
||||
static u64 erst_writer(enum pstore_type_id type, size_t size,
|
||||
static u64 erst_writer(enum pstore_type_id type, int part, size_t size,
|
||||
struct pstore_info *psi)
|
||||
{
|
||||
struct cper_pstore_record *rcd = (struct cper_pstore_record *)
|
||||
|
@ -1083,7 +1084,8 @@ static u64 erst_writer(enum pstore_type_id type, size_t size,
|
|||
return rcd->hdr.record_id;
|
||||
}
|
||||
|
||||
static int erst_clearer(u64 id, struct pstore_info *psi)
|
||||
static int erst_clearer(enum pstore_type_id type, u64 id,
|
||||
struct pstore_info *psi)
|
||||
{
|
||||
return erst_clear(id);
|
||||
}
|
||||
|
|
|
@ -39,8 +39,9 @@
|
|||
#define PSTORE_NAMELEN 64
|
||||
|
||||
struct pstore_private {
|
||||
u64 id;
|
||||
struct pstore_info *psi;
|
||||
enum pstore_type_id type;
|
||||
u64 id;
|
||||
ssize_t size;
|
||||
char data[];
|
||||
};
|
||||
|
@ -73,7 +74,7 @@ static int pstore_unlink(struct inode *dir, struct dentry *dentry)
|
|||
{
|
||||
struct pstore_private *p = dentry->d_inode->i_private;
|
||||
|
||||
p->psi->erase(p->id, p->psi);
|
||||
p->psi->erase(p->type, p->id, p->psi);
|
||||
|
||||
return simple_unlink(dir, dentry);
|
||||
}
|
||||
|
@ -192,6 +193,7 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id,
|
|||
private = kmalloc(sizeof *private + size, GFP_KERNEL);
|
||||
if (!private)
|
||||
goto fail_alloc;
|
||||
private->type = type;
|
||||
private->id = id;
|
||||
private->psi = psi;
|
||||
|
||||
|
|
|
@ -78,7 +78,7 @@ static void pstore_dump(struct kmsg_dumper *dumper,
|
|||
oopscount++;
|
||||
while (total < kmsg_bytes) {
|
||||
dst = psinfo->buf;
|
||||
hsize = sprintf(dst, "%s#%d Part%d\n", why, oopscount, part++);
|
||||
hsize = sprintf(dst, "%s#%d Part%d\n", why, oopscount, part);
|
||||
size = psinfo->bufsize - hsize;
|
||||
dst += hsize;
|
||||
|
||||
|
@ -94,8 +94,8 @@ 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, hsize + l1_cpy + l2_cpy,
|
||||
psinfo);
|
||||
id = psinfo->write(PSTORE_TYPE_DMESG, part,
|
||||
hsize + l1_cpy + l2_cpy, psinfo);
|
||||
if (reason == KMSG_DUMP_OOPS && pstore_is_mounted())
|
||||
pstore_mkfile(PSTORE_TYPE_DMESG, psinfo->name, id,
|
||||
psinfo->buf, hsize + l1_cpy + l2_cpy,
|
||||
|
@ -103,6 +103,7 @@ static void pstore_dump(struct kmsg_dumper *dumper,
|
|||
l1 -= l1_cpy;
|
||||
l2 -= l2_cpy;
|
||||
total += l1_cpy + l2_cpy;
|
||||
part++;
|
||||
}
|
||||
mutex_unlock(&psinfo->buf_mutex);
|
||||
}
|
||||
|
@ -197,7 +198,7 @@ int pstore_write(enum pstore_type_id type, char *buf, size_t size)
|
|||
|
||||
mutex_lock(&psinfo->buf_mutex);
|
||||
memcpy(psinfo->buf, buf, size);
|
||||
id = psinfo->write(type, size, psinfo);
|
||||
id = psinfo->write(type, 0, size, psinfo);
|
||||
if (pstore_is_mounted())
|
||||
pstore_mkfile(PSTORE_TYPE_DMESG, psinfo->name, id, psinfo->buf,
|
||||
size, CURRENT_TIME, psinfo);
|
||||
|
|
|
@ -39,9 +39,10 @@ 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, size_t size,
|
||||
u64 (*write)(enum pstore_type_id type, int part,
|
||||
size_t size, struct pstore_info *psi);
|
||||
int (*erase)(enum pstore_type_id type, u64 id,
|
||||
struct pstore_info *psi);
|
||||
int (*erase)(u64 id, struct pstore_info *psi);
|
||||
void *data;
|
||||
};
|
||||
|
||||
|
|
Loading…
Reference in New Issue