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-rw-r--r--arch/powerpc/kernel/nvram_64.c4
-rw-r--r--drivers/acpi/apei/erst.c7
-rw-r--r--drivers/firmware/efi/efi-pstore.c6
-rw-r--r--fs/pstore/Kconfig31
-rw-r--r--fs/pstore/platform.c218
-rw-r--r--fs/pstore/ram.c10
-rw-r--r--include/linux/pstore.h3
7 files changed, 261 insertions, 18 deletions
diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index 856f9a7944cd..64174bf95611 100644
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -444,7 +444,8 @@ static int nvram_pstore_write(enum pstore_type_id type,
*/
static ssize_t nvram_pstore_read(u64 *id, enum pstore_type_id *type,
int *count, struct timespec *time, char **buf,
- bool *compressed, struct pstore_info *psi)
+ bool *compressed, ssize_t *ecc_notice_size,
+ struct pstore_info *psi)
{
struct oops_log_info *oops_hdr;
unsigned int err_type, id_no, size = 0;
@@ -545,6 +546,7 @@ static ssize_t nvram_pstore_read(u64 *id, enum pstore_type_id *type,
return -ENOMEM;
kfree(buff);
+ *ecc_notice_size = 0;
if (err_type == ERR_TYPE_KERNEL_PANIC_GZ)
*compressed = true;
else
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 006c3894c6ea..f096ab3cb54d 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -927,7 +927,8 @@ 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, struct pstore_info *psi);
+ 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);
@@ -987,7 +988,8 @@ 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, struct pstore_info *psi)
+ bool *compressed, ssize_t *ecc_notice_size,
+ struct pstore_info *psi)
{
int rc;
ssize_t len = 0;
@@ -1033,6 +1035,7 @@ skip:
memcpy(*buf, rcd->data, len - sizeof(*rcd));
*id = record_id;
*compressed = false;
+ *ecc_notice_size = 0;
if (uuid_le_cmp(rcd->sec_hdr.section_type,
CPER_SECTION_TYPE_DMESG_Z) == 0) {
*type = PSTORE_TYPE_DMESG;
diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c
index eac76a79a880..d5903ea77238 100644
--- a/drivers/firmware/efi/efi-pstore.c
+++ b/drivers/firmware/efi/efi-pstore.c
@@ -34,6 +34,7 @@ struct pstore_read_data {
int *count;
struct timespec *timespec;
bool *compressed;
+ ssize_t *ecc_notice_size;
char **buf;
};
@@ -69,6 +70,7 @@ static int efi_pstore_read_func(struct efivar_entry *entry, void *data)
*cb_data->compressed = true;
else
*cb_data->compressed = false;
+ *cb_data->ecc_notice_size = 0;
} else if (sscanf(name, "dump-type%u-%u-%d-%lu",
cb_data->type, &part, &cnt, &time) == 4) {
*cb_data->id = generic_id(time, part, cnt);
@@ -76,6 +78,7 @@ static int efi_pstore_read_func(struct efivar_entry *entry, void *data)
cb_data->timespec->tv_sec = time;
cb_data->timespec->tv_nsec = 0;
*cb_data->compressed = false;
+ *cb_data->ecc_notice_size = 0;
} else if (sscanf(name, "dump-type%u-%u-%lu",
cb_data->type, &part, &time) == 3) {
/*
@@ -88,6 +91,7 @@ static int efi_pstore_read_func(struct efivar_entry *entry, void *data)
cb_data->timespec->tv_sec = time;
cb_data->timespec->tv_nsec = 0;
*cb_data->compressed = false;
+ *cb_data->ecc_notice_size = 0;
} else
return 0;
@@ -210,6 +214,7 @@ static int efi_pstore_sysfs_entry_iter(void *data, struct efivar_entry **pos)
static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
int *count, struct timespec *timespec,
char **buf, bool *compressed,
+ ssize_t *ecc_notice_size,
struct pstore_info *psi)
{
struct pstore_read_data data;
@@ -220,6 +225,7 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type,
data.count = count;
data.timespec = timespec;
data.compressed = compressed;
+ data.ecc_notice_size = ecc_notice_size;
data.buf = buf;
*data.buf = kzalloc(EFIVARS_DATA_SIZE_MAX, GFP_KERNEL);
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
index 360ae43f590c..be40813eff52 100644
--- a/fs/pstore/Kconfig
+++ b/fs/pstore/Kconfig
@@ -1,8 +1,6 @@
config PSTORE
tristate "Persistent store support"
default n
- select ZLIB_DEFLATE
- select ZLIB_INFLATE
help
This option enables generic access to platform level
persistent storage via "pstore" filesystem that can
@@ -14,6 +12,35 @@ config PSTORE
If you don't have a platform persistent store driver,
say N.
+choice
+ prompt "Choose compression algorithm"
+ depends on PSTORE
+ default PSTORE_ZLIB_COMPRESS
+ help
+ This option chooses compression algorithm.
+
+config PSTORE_ZLIB_COMPRESS
+ bool "ZLIB"
+ select ZLIB_DEFLATE
+ select ZLIB_INFLATE
+ help
+ This option enables ZLIB compression algorithm support.
+
+config PSTORE_LZO_COMPRESS
+ bool "LZO"
+ select LZO_COMPRESS
+ select LZO_DECOMPRESS
+ help
+ This option enables LZO compression algorithm support.
+
+config PSTORE_LZ4_COMPRESS
+ bool "LZ4"
+ select LZ4_COMPRESS
+ select LZ4_DECOMPRESS
+ help
+ This option enables LZ4 compression algorithm support.
+endchoice
+
config PSTORE_CONSOLE
bool "Log kernel console messages"
depends on PSTORE
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index fe41d8ec663a..16ecca5b72d8 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -28,7 +28,15 @@
#include <linux/console.h>
#include <linux/module.h>
#include <linux/pstore.h>
+#ifdef CONFIG_PSTORE_ZLIB_COMPRESS
#include <linux/zlib.h>
+#endif
+#ifdef CONFIG_PSTORE_LZO_COMPRESS
+#include <linux/lzo.h>
+#endif
+#ifdef CONFIG_PSTORE_LZ4_COMPRESS
+#include <linux/lz4.h>
+#endif
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/slab.h>
@@ -69,10 +77,23 @@ struct pstore_info *psinfo;
static char *backend;
/* Compression parameters */
+#ifdef CONFIG_PSTORE_ZLIB_COMPRESS
#define COMPR_LEVEL 6
#define WINDOW_BITS 12
#define MEM_LEVEL 4
static struct z_stream_s stream;
+#else
+static unsigned char *workspace;
+#endif
+
+struct pstore_zbackend {
+ int (*compress)(const void *in, void *out, size_t inlen, size_t outlen);
+ int (*decompress)(void *in, void *out, size_t inlen, size_t outlen);
+ void (*allocate)(void);
+ void (*free)(void);
+
+ const char *name;
+};
static char *big_oops_buf;
static size_t big_oops_buf_sz;
@@ -129,9 +150,9 @@ bool pstore_cannot_block_path(enum kmsg_dump_reason reason)
}
EXPORT_SYMBOL_GPL(pstore_cannot_block_path);
+#ifdef CONFIG_PSTORE_ZLIB_COMPRESS
/* Derived from logfs_compress() */
-static int pstore_compress(const void *in, void *out, size_t inlen,
- size_t outlen)
+static int compress_zlib(const void *in, void *out, size_t inlen, size_t outlen)
{
int err, ret;
@@ -165,7 +186,7 @@ error:
}
/* Derived from logfs_uncompress */
-static int pstore_decompress(void *in, void *out, size_t inlen, size_t outlen)
+static int decompress_zlib(void *in, void *out, size_t inlen, size_t outlen)
{
int err, ret;
@@ -194,7 +215,7 @@ error:
return ret;
}
-static void allocate_buf_for_compression(void)
+static void allocate_zlib(void)
{
size_t size;
size_t cmpr;
@@ -237,12 +258,190 @@ static void allocate_buf_for_compression(void)
}
-static void free_buf_for_compression(void)
+static void free_zlib(void)
{
kfree(stream.workspace);
stream.workspace = NULL;
kfree(big_oops_buf);
big_oops_buf = NULL;
+ big_oops_buf_sz = 0;
+}
+
+static struct pstore_zbackend backend_zlib = {
+ .compress = compress_zlib,
+ .decompress = decompress_zlib,
+ .allocate = allocate_zlib,
+ .free = free_zlib,
+ .name = "zlib",
+};
+#endif
+
+#ifdef CONFIG_PSTORE_LZO_COMPRESS
+static int compress_lzo(const void *in, void *out, size_t inlen, size_t outlen)
+{
+ int ret;
+
+ ret = lzo1x_1_compress(in, inlen, out, &outlen, workspace);
+ if (ret != LZO_E_OK) {
+ pr_err("lzo_compress error, ret = %d!\n", ret);
+ return -EIO;
+ }
+
+ return outlen;
+}
+
+static int decompress_lzo(void *in, void *out, size_t inlen, size_t outlen)
+{
+ int ret;
+
+ ret = lzo1x_decompress_safe(in, inlen, out, &outlen);
+ if (ret != LZO_E_OK) {
+ pr_err("lzo_decompress error, ret = %d!\n", ret);
+ return -EIO;
+ }
+
+ return outlen;
+}
+
+static void allocate_lzo(void)
+{
+ big_oops_buf_sz = lzo1x_worst_compress(psinfo->bufsize);
+ big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL);
+ if (big_oops_buf) {
+ workspace = kmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
+ if (!workspace) {
+ pr_err("No memory for compression workspace; skipping compression\n");
+ kfree(big_oops_buf);
+ big_oops_buf = NULL;
+ }
+ } else {
+ pr_err("No memory for uncompressed data; skipping compression\n");
+ workspace = NULL;
+ }
+}
+
+static void free_lzo(void)
+{
+ kfree(workspace);
+ kfree(big_oops_buf);
+ big_oops_buf = NULL;
+ big_oops_buf_sz = 0;
+}
+
+static struct pstore_zbackend backend_lzo = {
+ .compress = compress_lzo,
+ .decompress = decompress_lzo,
+ .allocate = allocate_lzo,
+ .free = free_lzo,
+ .name = "lzo",
+};
+#endif
+
+#ifdef CONFIG_PSTORE_LZ4_COMPRESS
+static int compress_lz4(const void *in, void *out, size_t inlen, size_t outlen)
+{
+ int ret;
+
+ ret = lz4_compress(in, inlen, out, &outlen, workspace);
+ if (ret) {
+ pr_err("lz4_compress error, ret = %d!\n", ret);
+ return -EIO;
+ }
+
+ return outlen;
+}
+
+static int decompress_lz4(void *in, void *out, size_t inlen, size_t outlen)
+{
+ int ret;
+
+ ret = lz4_decompress_unknownoutputsize(in, inlen, out, &outlen);
+ if (ret) {
+ pr_err("lz4_decompress error, ret = %d!\n", ret);
+ return -EIO;
+ }
+
+ return outlen;
+}
+
+static void allocate_lz4(void)
+{
+ big_oops_buf_sz = lz4_compressbound(psinfo->bufsize);
+ big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL);
+ if (big_oops_buf) {
+ workspace = kmalloc(LZ4_MEM_COMPRESS, GFP_KERNEL);
+ if (!workspace) {
+ pr_err("No memory for compression workspace; skipping compression\n");
+ kfree(big_oops_buf);
+ big_oops_buf = NULL;
+ }
+ } else {
+ pr_err("No memory for uncompressed data; skipping compression\n");
+ workspace = NULL;
+ }
+}
+
+static void free_lz4(void)
+{
+ kfree(workspace);
+ kfree(big_oops_buf);
+ big_oops_buf = NULL;
+ big_oops_buf_sz = 0;
+}
+
+static struct pstore_zbackend backend_lz4 = {
+ .compress = compress_lz4,
+ .decompress = decompress_lz4,
+ .allocate = allocate_lz4,
+ .free = free_lz4,
+ .name = "lz4",
+};
+#endif
+
+static struct pstore_zbackend *zbackend =
+#if defined(CONFIG_PSTORE_ZLIB_COMPRESS)
+ &backend_zlib;
+#elif defined(CONFIG_PSTORE_LZO_COMPRESS)
+ &backend_lzo;
+#elif defined(CONFIG_PSTORE_LZ4_COMPRESS)
+ &backend_lz4;
+#else
+ NULL;
+#endif
+
+static int pstore_compress(const void *in, void *out,
+ size_t inlen, size_t outlen)
+{
+ if (zbackend)
+ return zbackend->compress(in, out, inlen, outlen);
+ else
+ return -EIO;
+}
+
+static int pstore_decompress(void *in, void *out, size_t inlen, size_t outlen)
+{
+ if (zbackend)
+ return zbackend->decompress(in, out, inlen, outlen);
+ else
+ return -EIO;
+}
+
+static void allocate_buf_for_compression(void)
+{
+ if (zbackend) {
+ pr_info("using %s compression\n", zbackend->name);
+ zbackend->allocate();
+ } else {
+ pr_err("allocate compression buffer error!\n");
+ }
+}
+
+static void free_buf_for_compression(void)
+{
+ if (zbackend)
+ zbackend->free();
+ else
+ pr_err("free compression buffer error!\n");
}
/*
@@ -522,6 +721,7 @@ void pstore_get_records(int quiet)
int failed = 0, rc;
bool compressed;
int unzipped_len = -1;
+ ssize_t ecc_notice_size = 0;
if (!psi)
return;
@@ -531,7 +731,7 @@ void pstore_get_records(int quiet)
goto out;
while ((size = psi->read(&id, &type, &count, &time, &buf, &compressed,
- psi)) > 0) {
+ &ecc_notice_size, psi)) > 0) {
if (compressed && (type == PSTORE_TYPE_DMESG)) {
if (big_oops_buf)
unzipped_len = pstore_decompress(buf,
@@ -539,6 +739,9 @@ void pstore_get_records(int quiet)
big_oops_buf_sz);
if (unzipped_len > 0) {
+ if (ecc_notice_size)
+ memcpy(big_oops_buf + unzipped_len,
+ buf + size, ecc_notice_size);
kfree(buf);
buf = big_oops_buf;
size = unzipped_len;
@@ -550,7 +753,8 @@ void pstore_get_records(int quiet)
}
}
rc = pstore_mkfile(type, psi->name, id, count, buf,
- compressed, (size_t)size, time, psi);
+ compressed, size + ecc_notice_size,
+ time, psi);
if (unzipped_len < 0) {
/* Free buffer other than big oops */
kfree(buf);
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index bd9812e83461..d9668c2b43cb 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -181,10 +181,10 @@ static bool prz_ok(struct persistent_ram_zone *prz)
static ssize_t ramoops_pstore_read(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)
{
ssize_t size;
- ssize_t ecc_notice_size;
struct ramoops_context *cxt = psi->data;
struct persistent_ram_zone *prz = NULL;
int header_length = 0;
@@ -229,16 +229,16 @@ static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type,
size = persistent_ram_old_size(prz) - header_length;
/* ECC correction notice */
- ecc_notice_size = persistent_ram_ecc_string(prz, NULL, 0);
+ *ecc_notice_size = persistent_ram_ecc_string(prz, NULL, 0);
- *buf = kmalloc(size + ecc_notice_size + 1, GFP_KERNEL);
+ *buf = kmalloc(size + *ecc_notice_size + 1, GFP_KERNEL);
if (*buf == NULL)
return -ENOMEM;
memcpy(*buf, (char *)persistent_ram_old(prz) + header_length, size);
- persistent_ram_ecc_string(prz, *buf + size, ecc_notice_size + 1);
+ persistent_ram_ecc_string(prz, *buf + size, *ecc_notice_size + 1);
- return size + ecc_notice_size;
+ return size;
}
static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz,
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index 831479f8df8f..899e95e84400 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -58,7 +58,8 @@ struct pstore_info {
int (*close)(struct pstore_info *psi);
ssize_t (*read)(u64 *id, enum pstore_type_id *type,
int *count, struct timespec *time, char **buf,
- bool *compressed, struct pstore_info *psi);
+ bool *compressed, ssize_t *ecc_notice_size,
+ struct pstore_info *psi);
int (*write)(enum pstore_type_id type,
enum kmsg_dump_reason reason, u64 *id,
unsigned int part, int count, bool compressed,
generated by cgit (git 2.34.1) at 2024-05-30 14:26:56 +0000