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- constify compression structures; Bhumika Goyal

Browse source 
- restore powerpc dumping; Ankit Kumar
 - fix more bugs in the rarely exercises module unloading logic
 - reorganize filesystem locking to fix problems noticed by lockdep
 - refactor internal pstore APIs to make development and review easier:
   - improve error reporting
   - add kernel-doc structure and function comments
   - avoid insane argument passing by using a common record structure
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 Comment: Kees Cook <[email protected]>
 
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Merge tag 'pstore-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull pstore updates from Kees Cook:
 "This has a large internal refactoring along with several smaller
  fixes.

   - constify compression structures; Bhumika Goyal

   - restore powerpc dumping; Ankit Kumar

   - fix more bugs in the rarely exercises module unloading logic

   - reorganize filesystem locking to fix problems noticed by lockdep

   - refactor internal pstore APIs to make development and review
     easier:
      - improve error reporting
      - add kernel-doc structure and function comments
      - avoid insane argument passing by using a common record
        structure"

* tag 'pstore-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (23 commits)
  pstore: Solve lockdep warning by moving inode locks
  pstore: Fix flags to enable dumps on powerpc
  pstore: Remove unused vmalloc.h in pmsg
  pstore: simplify write_user_compat()
  pstore: Remove write_buf() callback
  pstore: Replace arguments for write_buf_user() API
  pstore: Replace arguments for write_buf() API
  pstore: Replace arguments for erase() API
  pstore: Do not duplicate record metadata
  pstore: Allocate records on heap instead of stack
  pstore: Pass record contents instead of copying
  pstore: Always allocate buffer for decompression
  pstore: Replace arguments for write() API
  pstore: Replace arguments for read() API
  pstore: Switch pstore_mkfile to pass record
  pstore: Move record decompression to function
  pstore: Extract common arguments into structure
  pstore: Add kernel-doc for struct pstore_info
  pstore: Improve register_pstore() error reporting
  pstore: Avoid race in module unloading
  ...
This commit is contained in:
Linus Torvalds 2017-05-02 10:35:45 -07:00
commit 2575be8ad3
11 changed files with 607 additions and 461 deletions
Download patch file Download diff file Expand all files Collapse all files

64
drivers/acpi/apei/erst.c
View file

@ -925,15 +925,9 @@ 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, int *count,
struct timespec *time, char **buf,
bool *compressed, ssize_t *ecc_notice_size,
struct pstore_info *psi);
static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
u64 *id, unsigned int part, int count, bool compressed,
size_t size, 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 ssize_t erst_reader(struct pstore_record *record);
static int erst_writer(struct pstore_record *record);
static int erst_clearer(struct pstore_record *record);
static struct pstore_info erst_info = {
.owner = THIS_MODULE,
@ -986,10 +980,7 @@ static int erst_close_pstore(struct pstore_info *psi)
return 0;
}
static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, int *count,
struct timespec *time, char **buf,
bool *compressed, ssize_t *ecc_notice_size,
struct pstore_info *psi)
static ssize_t erst_reader(struct pstore_record *record)
{
int rc;
ssize_t len = 0;
@ -1027,42 +1018,40 @@ skip:
if (uuid_le_cmp(rcd->hdr.creator_id, CPER_CREATOR_PSTORE) != 0)
goto skip;
*buf = kmalloc(len, GFP_KERNEL);
if (*buf == NULL) {
record->buf = kmalloc(len, GFP_KERNEL);
if (record->buf == NULL) {
rc = -ENOMEM;
goto out;
}
memcpy(*buf, rcd->data, len - sizeof(*rcd));
*id = record_id;
*compressed = false;
*ecc_notice_size = 0;
memcpy(record->buf, rcd->data, len - sizeof(*rcd));
record->id = record_id;
record->compressed = false;
record->ecc_notice_size = 0;
if (uuid_le_cmp(rcd->sec_hdr.section_type,
CPER_SECTION_TYPE_DMESG_Z) == 0) {
*type = PSTORE_TYPE_DMESG;
*compressed = true;
record->type = PSTORE_TYPE_DMESG;
record->compressed = true;
} else if (uuid_le_cmp(rcd->sec_hdr.section_type,
CPER_SECTION_TYPE_DMESG) == 0)
*type = PSTORE_TYPE_DMESG;
record->type = PSTORE_TYPE_DMESG;
else if (uuid_le_cmp(rcd->sec_hdr.section_type,
CPER_SECTION_TYPE_MCE) == 0)
*type = PSTORE_TYPE_MCE;
record->type = PSTORE_TYPE_MCE;
else
*type = PSTORE_TYPE_UNKNOWN;
record->type = PSTORE_TYPE_UNKNOWN;
if (rcd->hdr.validation_bits & CPER_VALID_TIMESTAMP)
time->tv_sec = rcd->hdr.timestamp;
record->time.tv_sec = rcd->hdr.timestamp;
else
time->tv_sec = 0;
time->tv_nsec = 0;
record->time.tv_sec = 0;
record->time.tv_nsec = 0;
out:
kfree(rcd);
return (rc < 0) ? rc : (len - sizeof(*rcd));
}
static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
u64 *id, unsigned int part, int count, bool compressed,
size_t size, struct pstore_info *psi)
static int erst_writer(struct pstore_record *record)
{
struct cper_pstore_record *rcd = (struct cper_pstore_record *)
(erst_info.buf - sizeof(*rcd));
@ -1077,21 +1066,21 @@ static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
/* timestamp valid. platform_id, partition_id are invalid */
rcd->hdr.validation_bits = CPER_VALID_TIMESTAMP;
rcd->hdr.timestamp = get_seconds();
rcd->hdr.record_length = sizeof(*rcd) + size;
rcd->hdr.record_length = sizeof(*rcd) + record->size;
rcd->hdr.creator_id = CPER_CREATOR_PSTORE;
rcd->hdr.notification_type = CPER_NOTIFY_MCE;
rcd->hdr.record_id = cper_next_record_id();
rcd->hdr.flags = CPER_HW_ERROR_FLAGS_PREVERR;
rcd->sec_hdr.section_offset = sizeof(*rcd);
rcd->sec_hdr.section_length = size;
rcd->sec_hdr.section_length = record->size;
rcd->sec_hdr.revision = CPER_SEC_REV;
/* fru_id and fru_text is invalid */
rcd->sec_hdr.validation_bits = 0;
rcd->sec_hdr.flags = CPER_SEC_PRIMARY;
switch (type) {
switch (record->type) {
case PSTORE_TYPE_DMESG:
if (compressed)
if (record->compressed)
rcd->sec_hdr.section_type = CPER_SECTION_TYPE_DMESG_Z;
else
rcd->sec_hdr.section_type = CPER_SECTION_TYPE_DMESG;
@ -1105,15 +1094,14 @@ static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
rcd->sec_hdr.section_severity = CPER_SEV_FATAL;
ret = erst_write(&rcd->hdr);
*id = rcd->hdr.record_id;
record->id = rcd->hdr.record_id;
return ret;
}
static int erst_clearer(enum pstore_type_id type, u64 id, int count,
struct timespec time, struct pstore_info *psi)
static int erst_clearer(struct pstore_record *record)
{
return erst_clear(id);
return erst_clear(record->id);
}
static int __init erst_init(void)