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path: root/drivers/mtd/ubi/io.c
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Diffstat (limited to 'drivers/mtd/ubi/io.c')
-rw-r--r--drivers/mtd/ubi/io.c410
1 files changed, 229 insertions, 181 deletions
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index bf79def40126..915eb64cb001 100644
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -1,21 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) International Business Machines Corp., 2006
* Copyright (c) Nokia Corporation, 2006, 2007
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
* Author: Artem Bityutskiy (Битюцкий Артём)
*/
@@ -45,7 +32,7 @@
* About minimal I/O units. In general, UBI assumes flash device model where
* there is only one minimal I/O unit size. E.g., in case of NOR flash it is 1,
* in case of NAND flash it is a NAND page, etc. This is reported by MTD in the
- * @ubi->mtd->writesize field. But as an exception, UBI admits of using another
+ * @ubi->mtd->writesize field. But as an exception, UBI admits use of another
* (smaller) minimal I/O unit size for EC and VID headers to make it possible
* to do different optimizations.
*
@@ -177,19 +164,20 @@ retry:
* enabled. A corresponding message will be printed
* later, when it is has been scrubbed.
*/
- ubi_msg("fixable bit-flip detected at PEB %d", pnum);
+ ubi_msg(ubi, "fixable bit-flip detected at PEB %d",
+ pnum);
ubi_assert(len == read);
return UBI_IO_BITFLIPS;
}
if (retries++ < UBI_IO_RETRIES) {
- ubi_warn("error %d%s while reading %d bytes from PEB %d:%d, read only %zd bytes, retry",
+ ubi_warn(ubi, "error %d%s while reading %d bytes from PEB %d:%d, read only %zd bytes, retry",
err, errstr, len, pnum, offset, read);
yield();
goto retry;
}
- ubi_err("error %d%s while reading %d bytes from PEB %d:%d, read %zd bytes",
+ ubi_err(ubi, "error %d%s while reading %d bytes from PEB %d:%d, read %zd bytes",
err, errstr, len, pnum, offset, read);
dump_stack();
@@ -207,7 +195,19 @@ retry:
if (ubi_dbg_is_bitflip(ubi)) {
dbg_gen("bit-flip (emulated)");
- err = UBI_IO_BITFLIPS;
+ return UBI_IO_BITFLIPS;
+ }
+
+ if (ubi_dbg_is_read_failure(ubi, MASK_READ_FAILURE)) {
+ ubi_warn(ubi, "cannot read %d bytes from PEB %d:%d (emulated)",
+ len, pnum, offset);
+ return -EIO;
+ }
+
+ if (ubi_dbg_is_eccerr(ubi)) {
+ ubi_warn(ubi, "ECC error (emulated) while reading %d bytes from PEB %d:%d, read %zd bytes",
+ len, pnum, offset, read);
+ return -EBADMSG;
}
}
@@ -246,7 +246,7 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
ubi_assert(len > 0 && len % ubi->hdrs_min_io_size == 0);
if (ubi->ro_mode) {
- ubi_err("read-only mode");
+ ubi_err(ubi, "read-only mode");
return -EROFS;
}
@@ -273,7 +273,7 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
}
if (ubi_dbg_is_write_failure(ubi)) {
- ubi_err("cannot write %d bytes to PEB %d:%d (emulated)",
+ ubi_err(ubi, "cannot write %d bytes to PEB %d:%d (emulated)",
len, pnum, offset);
dump_stack();
return -EIO;
@@ -282,7 +282,7 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
addr = (loff_t)pnum * ubi->peb_size + offset;
err = mtd_write(ubi->mtd, addr, len, &written, buf);
if (err) {
- ubi_err("error %d while writing %d bytes to PEB %d:%d, written %zd bytes",
+ ubi_err(ubi, "error %d while writing %d bytes to PEB %d:%d, written %zd bytes",
err, len, pnum, offset, written);
dump_stack();
ubi_dump_flash(ubi, pnum, offset, len);
@@ -308,18 +308,6 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
}
/**
- * erase_callback - MTD erasure call-back.
- * @ei: MTD erase information object.
- *
- * Note, even though MTD erase interface is asynchronous, all the current
- * implementations are synchronous anyway.
- */
-static void erase_callback(struct erase_info *ei)
-{
- wake_up_interruptible((wait_queue_head_t *)ei->priv);
-}
-
-/**
* do_sync_erase - synchronously erase a physical eraseblock.
* @ubi: UBI device description object
* @pnum: the physical eraseblock number to erase
@@ -332,63 +320,40 @@ static int do_sync_erase(struct ubi_device *ubi, int pnum)
{
int err, retries = 0;
struct erase_info ei;
- wait_queue_head_t wq;
dbg_io("erase PEB %d", pnum);
ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
if (ubi->ro_mode) {
- ubi_err("read-only mode");
+ ubi_err(ubi, "read-only mode");
return -EROFS;
}
retry:
- init_waitqueue_head(&wq);
memset(&ei, 0, sizeof(struct erase_info));
- ei.mtd = ubi->mtd;
ei.addr = (loff_t)pnum * ubi->peb_size;
ei.len = ubi->peb_size;
- ei.callback = erase_callback;
- ei.priv = (unsigned long)&wq;
err = mtd_erase(ubi->mtd, &ei);
if (err) {
if (retries++ < UBI_IO_RETRIES) {
- ubi_warn("error %d while erasing PEB %d, retry",
+ ubi_warn(ubi, "error %d while erasing PEB %d, retry",
err, pnum);
yield();
goto retry;
}
- ubi_err("cannot erase PEB %d, error %d", pnum, err);
+ ubi_err(ubi, "cannot erase PEB %d, error %d", pnum, err);
dump_stack();
return err;
}
- err = wait_event_interruptible(wq, ei.state == MTD_ERASE_DONE ||
- ei.state == MTD_ERASE_FAILED);
- if (err) {
- ubi_err("interrupted PEB %d erasure", pnum);
- return -EINTR;
- }
-
- if (ei.state == MTD_ERASE_FAILED) {
- if (retries++ < UBI_IO_RETRIES) {
- ubi_warn("error while erasing PEB %d, retry", pnum);
- yield();
- goto retry;
- }
- ubi_err("cannot erase PEB %d", pnum);
- dump_stack();
- return -EIO;
- }
-
err = ubi_self_check_all_ff(ubi, pnum, 0, ubi->peb_size);
if (err)
return err;
if (ubi_dbg_is_erase_failure(ubi)) {
- ubi_err("cannot erase PEB %d (emulated)", pnum);
+ ubi_err(ubi, "cannot erase PEB %d (emulated)", pnum);
return -EIO;
}
@@ -411,7 +376,7 @@ static int torture_peb(struct ubi_device *ubi, int pnum)
{
int err, i, patt_count;
- ubi_msg("run torture test for PEB %d", pnum);
+ ubi_msg(ubi, "run torture test for PEB %d", pnum);
patt_count = ARRAY_SIZE(patterns);
ubi_assert(patt_count > 0);
@@ -428,7 +393,7 @@ static int torture_peb(struct ubi_device *ubi, int pnum)
err = ubi_check_pattern(ubi->peb_buf, 0xFF, ubi->peb_size);
if (err == 0) {
- ubi_err("erased PEB %d, but a non-0xFF byte found",
+ ubi_err(ubi, "erased PEB %d, but a non-0xFF byte found",
pnum);
err = -EIO;
goto out;
@@ -448,7 +413,7 @@ static int torture_peb(struct ubi_device *ubi, int pnum)
err = ubi_check_pattern(ubi->peb_buf, patterns[i],
ubi->peb_size);
if (err == 0) {
- ubi_err("pattern %x checking failed for PEB %d",
+ ubi_err(ubi, "pattern %x checking failed for PEB %d",
patterns[i], pnum);
err = -EIO;
goto out;
@@ -456,7 +421,7 @@ static int torture_peb(struct ubi_device *ubi, int pnum)
}
err = patt_count;
- ubi_msg("PEB %d passed torture test, do not mark it as bad", pnum);
+ ubi_msg(ubi, "PEB %d passed torture test, do not mark it as bad", pnum);
out:
mutex_unlock(&ubi->buf_mutex);
@@ -466,7 +431,7 @@ out:
* has not passed because it happened on a freshly erased
* physical eraseblock which means something is wrong with it.
*/
- ubi_err("read problems on freshly erased PEB %d, must be bad",
+ ubi_err(ubi, "read problems on freshly erased PEB %d, must be bad",
pnum);
err = -EIO;
}
@@ -495,10 +460,13 @@ out:
*/
static int nor_erase_prepare(struct ubi_device *ubi, int pnum)
{
- int err, err1;
+ int err;
size_t written;
loff_t addr;
uint32_t data = 0;
+ struct ubi_ec_hdr ec_hdr;
+ struct ubi_vid_io_buf vidb;
+
/*
* Note, we cannot generally define VID header buffers on stack,
* because of the way we deal with these buffers (see the header
@@ -509,50 +477,41 @@ static int nor_erase_prepare(struct ubi_device *ubi, int pnum)
struct ubi_vid_hdr vid_hdr;
/*
+ * If VID or EC is valid, we have to corrupt them before erasing.
* It is important to first invalidate the EC header, and then the VID
* header. Otherwise a power cut may lead to valid EC header and
* invalid VID header, in which case UBI will treat this PEB as
* corrupted and will try to preserve it, and print scary warnings.
*/
addr = (loff_t)pnum * ubi->peb_size;
- err = mtd_write(ubi->mtd, addr, 4, &written, (void *)&data);
- if (!err) {
- addr += ubi->vid_hdr_aloffset;
+ err = ubi_io_read_ec_hdr(ubi, pnum, &ec_hdr, 0);
+ if (err != UBI_IO_BAD_HDR_EBADMSG && err != UBI_IO_BAD_HDR &&
+ err != UBI_IO_FF){
err = mtd_write(ubi->mtd, addr, 4, &written, (void *)&data);
- if (!err)
- return 0;
+ if(err)
+ goto error;
}
- /*
- * We failed to write to the media. This was observed with Spansion
- * S29GL512N NOR flash. Most probably the previously eraseblock erasure
- * was interrupted at a very inappropriate moment, so it became
- * unwritable. In this case we probably anyway have garbage in this
- * PEB.
- */
- err1 = ubi_io_read_vid_hdr(ubi, pnum, &vid_hdr, 0);
- if (err1 == UBI_IO_BAD_HDR_EBADMSG || err1 == UBI_IO_BAD_HDR ||
- err1 == UBI_IO_FF) {
- struct ubi_ec_hdr ec_hdr;
-
- err1 = ubi_io_read_ec_hdr(ubi, pnum, &ec_hdr, 0);
- if (err1 == UBI_IO_BAD_HDR_EBADMSG || err1 == UBI_IO_BAD_HDR ||
- err1 == UBI_IO_FF)
- /*
- * Both VID and EC headers are corrupted, so we can
- * safely erase this PEB and not afraid that it will be
- * treated as a valid PEB in case of an unclean reboot.
- */
- return 0;
+ ubi_init_vid_buf(ubi, &vidb, &vid_hdr);
+ ubi_assert(&vid_hdr == ubi_get_vid_hdr(&vidb));
+
+ err = ubi_io_read_vid_hdr(ubi, pnum, &vidb, 0);
+ if (err != UBI_IO_BAD_HDR_EBADMSG && err != UBI_IO_BAD_HDR &&
+ err != UBI_IO_FF){
+ addr += ubi->vid_hdr_aloffset;
+ err = mtd_write(ubi->mtd, addr, 4, &written, (void *)&data);
+ if (err)
+ goto error;
}
+ return 0;
+error:
/*
- * The PEB contains a valid VID header, but we cannot invalidate it.
- * Supposedly the flash media or the driver is screwed up, so return an
- * error.
+ * The PEB contains a valid VID or EC header, but we cannot invalidate
+ * it. Supposedly the flash media or the driver is screwed up, so
+ * return an error.
*/
- ubi_err("cannot invalidate PEB %d, write returned %d read returned %d",
- pnum, err, err1);
+ ubi_err(ubi, "cannot invalidate PEB %d, write returned %d", pnum, err);
ubi_dump_flash(ubi, pnum, 0, ubi->peb_size);
return -EIO;
}
@@ -584,11 +543,18 @@ int ubi_io_sync_erase(struct ubi_device *ubi, int pnum, int torture)
return err;
if (ubi->ro_mode) {
- ubi_err("read-only mode");
+ ubi_err(ubi, "read-only mode");
return -EROFS;
}
- if (ubi->nor_flash) {
+ /*
+ * If the flash is ECC-ed then we have to erase the ECC block before we
+ * can write to it. But the write is in preparation to an erase in the
+ * first place. This means we cannot zero out EC and VID before the
+ * erase and we just have to hope the flash starts erasing from the
+ * start of the page.
+ */
+ if (ubi->nor_flash && ubi->mtd->writesize == 1) {
err = nor_erase_prepare(ubi, pnum);
if (err)
return err;
@@ -626,7 +592,7 @@ int ubi_io_is_bad(const struct ubi_device *ubi, int pnum)
ret = mtd_block_isbad(mtd, (loff_t)pnum * ubi->peb_size);
if (ret < 0)
- ubi_err("error %d while checking if PEB %d is bad",
+ ubi_err(ubi, "error %d while checking if PEB %d is bad",
ret, pnum);
else if (ret)
dbg_io("PEB %d is bad", pnum);
@@ -652,7 +618,7 @@ int ubi_io_mark_bad(const struct ubi_device *ubi, int pnum)
ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
if (ubi->ro_mode) {
- ubi_err("read-only mode");
+ ubi_err(ubi, "read-only mode");
return -EROFS;
}
@@ -661,7 +627,7 @@ int ubi_io_mark_bad(const struct ubi_device *ubi, int pnum)
err = mtd_block_markbad(mtd, (loff_t)pnum * ubi->peb_size);
if (err)
- ubi_err("cannot mark PEB %d bad, error %d", pnum, err);
+ ubi_err(ubi, "cannot mark PEB %d bad, error %d", pnum, err);
return err;
}
@@ -684,32 +650,32 @@ static int validate_ec_hdr(const struct ubi_device *ubi,
leb_start = be32_to_cpu(ec_hdr->data_offset);
if (ec_hdr->version != UBI_VERSION) {
- ubi_err("node with incompatible UBI version found: this UBI version is %d, image version is %d",
+ ubi_err(ubi, "node with incompatible UBI version found: this UBI version is %d, image version is %d",
UBI_VERSION, (int)ec_hdr->version);
goto bad;
}
if (vid_hdr_offset != ubi->vid_hdr_offset) {
- ubi_err("bad VID header offset %d, expected %d",
+ ubi_err(ubi, "bad VID header offset %d, expected %d",
vid_hdr_offset, ubi->vid_hdr_offset);
goto bad;
}
if (leb_start != ubi->leb_start) {
- ubi_err("bad data offset %d, expected %d",
+ ubi_err(ubi, "bad data offset %d, expected %d",
leb_start, ubi->leb_start);
goto bad;
}
if (ec < 0 || ec > UBI_MAX_ERASECOUNTER) {
- ubi_err("bad erase counter %lld", ec);
+ ubi_err(ubi, "bad erase counter %lld", ec);
goto bad;
}
return 0;
bad:
- ubi_err("bad EC header");
+ ubi_err(ubi, "bad EC header");
ubi_dump_ec_hdr(ec_hdr);
dump_stack();
return 1;
@@ -775,7 +741,7 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
if (ubi_check_pattern(ec_hdr, 0xFF, UBI_EC_HDR_SIZE)) {
/* The physical eraseblock is supposedly empty */
if (verbose)
- ubi_warn("no EC header found at PEB %d, only 0xFF bytes",
+ ubi_warn(ubi, "no EC header found at PEB %d, only 0xFF bytes",
pnum);
dbg_bld("no EC header found at PEB %d, only 0xFF bytes",
pnum);
@@ -790,7 +756,7 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
* 0xFF bytes. Report that the header is corrupted.
*/
if (verbose) {
- ubi_warn("bad magic number at PEB %d: %08x instead of %08x",
+ ubi_warn(ubi, "bad magic number at PEB %d: %08x instead of %08x",
pnum, magic, UBI_EC_HDR_MAGIC);
ubi_dump_ec_hdr(ec_hdr);
}
@@ -804,7 +770,7 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
if (hdr_crc != crc) {
if (verbose) {
- ubi_warn("bad EC header CRC at PEB %d, calculated %#08x, read %#08x",
+ ubi_warn(ubi, "bad EC header CRC at PEB %d, calculated %#08x, read %#08x",
pnum, crc, hdr_crc);
ubi_dump_ec_hdr(ec_hdr);
}
@@ -820,7 +786,7 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
/* And of course validate what has just been read from the media */
err = validate_ec_hdr(ubi, ec_hdr);
if (err) {
- ubi_err("validation failed for PEB %d", pnum);
+ ubi_err(ubi, "validation failed for PEB %d", pnum);
return -EINVAL;
}
@@ -828,7 +794,36 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
* If there was %-EBADMSG, but the header CRC is still OK, report about
* a bit-flip to force scrubbing on this PEB.
*/
- return read_err ? UBI_IO_BITFLIPS : 0;
+ if (read_err)
+ return UBI_IO_BITFLIPS;
+
+ if (ubi_dbg_is_read_failure(ubi, MASK_READ_FAILURE_EC)) {
+ ubi_warn(ubi, "cannot read EC header from PEB %d (emulated)",
+ pnum);
+ return -EIO;
+ }
+
+ if (ubi_dbg_is_ff(ubi, MASK_IO_FF_EC)) {
+ ubi_warn(ubi, "bit-all-ff (emulated)");
+ return UBI_IO_FF;
+ }
+
+ if (ubi_dbg_is_ff_bitflips(ubi, MASK_IO_FF_BITFLIPS_EC)) {
+ ubi_warn(ubi, "bit-all-ff with error reported by MTD driver (emulated)");
+ return UBI_IO_FF_BITFLIPS;
+ }
+
+ if (ubi_dbg_is_bad_hdr(ubi, MASK_BAD_HDR_EC)) {
+ ubi_warn(ubi, "bad_hdr (emulated)");
+ return UBI_IO_BAD_HDR;
+ }
+
+ if (ubi_dbg_is_bad_hdr_ebadmsg(ubi, MASK_BAD_HDR_EBADMSG_EC)) {
+ ubi_warn(ubi, "bad_hdr with ECC error (emulated)");
+ return UBI_IO_BAD_HDR_EBADMSG;
+ }
+
+ return 0;
}
/**
@@ -867,6 +862,14 @@ int ubi_io_write_ec_hdr(struct ubi_device *ubi, int pnum,
if (err)
return err;
+ if (ubi_dbg_is_power_cut(ubi, MASK_POWER_CUT_EC)) {
+ ubi_warn(ubi, "emulating a power cut when writing EC header");
+ ubi_ro_mode(ubi);
+ return -EROFS;
+ }
+
+ memset((char *)ec_hdr + UBI_EC_HDR_SIZE, 0xFF, ubi->ec_hdr_alsize - UBI_EC_HDR_SIZE);
+
err = ubi_io_write(ubi, ec_hdr, pnum, 0, ubi->ec_hdr_alsize);
return err;
}
@@ -894,40 +897,45 @@ static int validate_vid_hdr(const struct ubi_device *ubi,
int usable_leb_size = ubi->leb_size - data_pad;
if (copy_flag != 0 && copy_flag != 1) {
- ubi_err("bad copy_flag");
+ ubi_err(ubi, "bad copy_flag");
goto bad;
}
if (vol_id < 0 || lnum < 0 || data_size < 0 || used_ebs < 0 ||
data_pad < 0) {
- ubi_err("negative values");
+ ubi_err(ubi, "negative values");
goto bad;
}
if (vol_id >= UBI_MAX_VOLUMES && vol_id < UBI_INTERNAL_VOL_START) {
- ubi_err("bad vol_id");
+ ubi_err(ubi, "bad vol_id");
goto bad;
}
if (vol_id < UBI_INTERNAL_VOL_START && compat != 0) {
- ubi_err("bad compat");
+ ubi_err(ubi, "bad compat");
goto bad;
}
if (vol_id >= UBI_INTERNAL_VOL_START && compat != UBI_COMPAT_DELETE &&
compat != UBI_COMPAT_RO && compat != UBI_COMPAT_PRESERVE &&
compat != UBI_COMPAT_REJECT) {
- ubi_err("bad compat");
+ ubi_err(ubi, "bad compat");
goto bad;
}
if (vol_type != UBI_VID_DYNAMIC && vol_type != UBI_VID_STATIC) {
- ubi_err("bad vol_type");
+ ubi_err(ubi, "bad vol_type");
goto bad;
}
if (data_pad >= ubi->leb_size / 2) {
- ubi_err("bad data_pad");
+ ubi_err(ubi, "bad data_pad");
+ goto bad;
+ }
+
+ if (data_size > ubi->leb_size) {
+ ubi_err(ubi, "bad data_size");
goto bad;
}
@@ -939,45 +947,40 @@ static int validate_vid_hdr(const struct ubi_device *ubi,
* mapped logical eraseblocks.
*/
if (used_ebs == 0) {
- ubi_err("zero used_ebs");
+ ubi_err(ubi, "zero used_ebs");
goto bad;
}
if (data_size == 0) {
- ubi_err("zero data_size");
+ ubi_err(ubi, "zero data_size");
goto bad;
}
if (lnum < used_ebs - 1) {
if (data_size != usable_leb_size) {
- ubi_err("bad data_size");
+ ubi_err(ubi, "bad data_size");
goto bad;
}
- } else if (lnum == used_ebs - 1) {
- if (data_size == 0) {
- ubi_err("bad data_size at last LEB");
- goto bad;
- }
- } else {
- ubi_err("too high lnum");
+ } else if (lnum > used_ebs - 1) {
+ ubi_err(ubi, "too high lnum");
goto bad;
}
} else {
if (copy_flag == 0) {
if (data_crc != 0) {
- ubi_err("non-zero data CRC");
+ ubi_err(ubi, "non-zero data CRC");
goto bad;
}
if (data_size != 0) {
- ubi_err("non-zero data_size");
+ ubi_err(ubi, "non-zero data_size");
goto bad;
}
} else {
if (data_size == 0) {
- ubi_err("zero data_size of copy");
+ ubi_err(ubi, "zero data_size of copy");
goto bad;
}
}
if (used_ebs != 0) {
- ubi_err("bad used_ebs");
+ ubi_err(ubi, "bad used_ebs");
goto bad;
}
}
@@ -985,7 +988,7 @@ static int validate_vid_hdr(const struct ubi_device *ubi,
return 0;
bad:
- ubi_err("bad VID header");
+ ubi_err(ubi, "bad VID header");
ubi_dump_vid_hdr(vid_hdr);
dump_stack();
return 1;
@@ -995,12 +998,11 @@ bad:
* ubi_io_read_vid_hdr - read and check a volume identifier header.
* @ubi: UBI device description object
* @pnum: physical eraseblock number to read from
- * @vid_hdr: &struct ubi_vid_hdr object where to store the read volume
- * identifier header
+ * @vidb: the volume identifier buffer to store data in
* @verbose: be verbose if the header is corrupted or wasn't found
*
* This function reads the volume identifier header from physical eraseblock
- * @pnum and stores it in @vid_hdr. It also checks CRC checksum of the read
+ * @pnum and stores it in @vidb. It also checks CRC checksum of the read
* volume identifier header. The error codes are the same as in
* 'ubi_io_read_ec_hdr()'.
*
@@ -1008,18 +1010,18 @@ bad:
* 'ubi_io_read_ec_hdr()', so refer commentaries in 'ubi_io_read_ec_hdr()'.
*/
int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
- struct ubi_vid_hdr *vid_hdr, int verbose)
+ struct ubi_vid_io_buf *vidb, int verbose)
{
int err, read_err;
uint32_t crc, magic, hdr_crc;
- void *p;
+ struct ubi_vid_hdr *vid_hdr = ubi_get_vid_hdr(vidb);
+ void *p = vidb->buffer;
dbg_io("read VID header from PEB %d", pnum);
ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
- p = (char *)vid_hdr - ubi->vid_hdr_shift;
read_err = ubi_io_read(ubi, p, pnum, ubi->vid_hdr_aloffset,
- ubi->vid_hdr_alsize);
+ ubi->vid_hdr_shift + UBI_VID_HDR_SIZE);
if (read_err && read_err != UBI_IO_BITFLIPS && !mtd_is_eccerr(read_err))
return read_err;
@@ -1030,7 +1032,7 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
if (ubi_check_pattern(vid_hdr, 0xFF, UBI_VID_HDR_SIZE)) {
if (verbose)
- ubi_warn("no VID header found at PEB %d, only 0xFF bytes",
+ ubi_warn(ubi, "no VID header found at PEB %d, only 0xFF bytes",
pnum);
dbg_bld("no VID header found at PEB %d, only 0xFF bytes",
pnum);
@@ -1041,7 +1043,7 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
}
if (verbose) {
- ubi_warn("bad magic number at PEB %d: %08x instead of %08x",
+ ubi_warn(ubi, "bad magic number at PEB %d: %08x instead of %08x",
pnum, magic, UBI_VID_HDR_MAGIC);
ubi_dump_vid_hdr(vid_hdr);
}
@@ -1055,7 +1057,7 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
if (hdr_crc != crc) {
if (verbose) {
- ubi_warn("bad CRC at PEB %d, calculated %#08x, read %#08x",
+ ubi_warn(ubi, "bad CRC at PEB %d, calculated %#08x, read %#08x",
pnum, crc, hdr_crc);
ubi_dump_vid_hdr(vid_hdr);
}
@@ -1069,34 +1071,64 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
err = validate_vid_hdr(ubi, vid_hdr);
if (err) {
- ubi_err("validation failed for PEB %d", pnum);
+ ubi_err(ubi, "validation failed for PEB %d", pnum);
return -EINVAL;
}
- return read_err ? UBI_IO_BITFLIPS : 0;
+ if (read_err)
+ return UBI_IO_BITFLIPS;
+
+ if (ubi_dbg_is_read_failure(ubi, MASK_READ_FAILURE_VID)) {
+ ubi_warn(ubi, "cannot read VID header from PEB %d (emulated)",
+ pnum);
+ return -EIO;
+ }
+
+ if (ubi_dbg_is_ff(ubi, MASK_IO_FF_VID)) {
+ ubi_warn(ubi, "bit-all-ff (emulated)");
+ return UBI_IO_FF;
+ }
+
+ if (ubi_dbg_is_ff_bitflips(ubi, MASK_IO_FF_BITFLIPS_VID)) {
+ ubi_warn(ubi, "bit-all-ff with error reported by MTD driver (emulated)");
+ return UBI_IO_FF_BITFLIPS;
+ }
+
+ if (ubi_dbg_is_bad_hdr(ubi, MASK_BAD_HDR_VID)) {
+ ubi_warn(ubi, "bad_hdr (emulated)");
+ return UBI_IO_BAD_HDR;
+ }
+
+ if (ubi_dbg_is_bad_hdr_ebadmsg(ubi, MASK_BAD_HDR_EBADMSG_VID)) {
+ ubi_warn(ubi, "bad_hdr with ECC error (emulated)");
+ return UBI_IO_BAD_HDR_EBADMSG;
+ }
+
+ return 0;
}
/**
* ubi_io_write_vid_hdr - write a volume identifier header.
* @ubi: UBI device description object
* @pnum: the physical eraseblock number to write to
- * @vid_hdr: the volume identifier header to write
+ * @vidb: the volume identifier buffer to write
*
* This function writes the volume identifier header described by @vid_hdr to
* physical eraseblock @pnum. This function automatically fills the
- * @vid_hdr->magic and the @vid_hdr->version fields, as well as calculates
- * header CRC checksum and stores it at vid_hdr->hdr_crc.
+ * @vidb->hdr->magic and the @vidb->hdr->version fields, as well as calculates
+ * header CRC checksum and stores it at vidb->hdr->hdr_crc.
*
* This function returns zero in case of success and a negative error code in
* case of failure. If %-EIO is returned, the physical eraseblock probably went
* bad.
*/
int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum,
- struct ubi_vid_hdr *vid_hdr)
+ struct ubi_vid_io_buf *vidb)
{
+ struct ubi_vid_hdr *vid_hdr = ubi_get_vid_hdr(vidb);
int err;
uint32_t crc;
- void *p;
+ void *p = vidb->buffer;
dbg_io("write VID header to PEB %d", pnum);
ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
@@ -1114,7 +1146,20 @@ int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum,
if (err)
return err;
- p = (char *)vid_hdr - ubi->vid_hdr_shift;
+ if (ubi_dbg_is_power_cut(ubi, MASK_POWER_CUT_VID)) {
+ ubi_warn(ubi, "emulating a power cut when writing VID header");
+ ubi_ro_mode(ubi);
+ return -EROFS;
+ }
+
+ if (ubi->vid_hdr_shift) {
+ memset((char *)p, 0xFF, ubi->vid_hdr_shift);
+ memset((char *)p + ubi->vid_hdr_shift + UBI_VID_HDR_SIZE, 0xFF,
+ ubi->vid_hdr_alsize - (ubi->vid_hdr_shift + UBI_VID_HDR_SIZE));
+ } else {
+ memset((char *)p + UBI_VID_HDR_SIZE, 0xFF, ubi->vid_hdr_alsize - UBI_VID_HDR_SIZE);
+ }
+
err = ubi_io_write(ubi, p, pnum, ubi->vid_hdr_aloffset,
ubi->vid_hdr_alsize);
return err;
@@ -1139,7 +1184,7 @@ static int self_check_not_bad(const struct ubi_device *ubi, int pnum)
if (!err)
return err;
- ubi_err("self-check failed for PEB %d", pnum);
+ ubi_err(ubi, "self-check failed for PEB %d", pnum);
dump_stack();
return err > 0 ? -EINVAL : err;
}
@@ -1164,14 +1209,14 @@ static int self_check_ec_hdr(const struct ubi_device *ubi, int pnum,
magic = be32_to_cpu(ec_hdr->magic);
if (magic != UBI_EC_HDR_MAGIC) {
- ubi_err("bad magic %#08x, must be %#08x",
+ ubi_err(ubi, "bad magic %#08x, must be %#08x",
magic, UBI_EC_HDR_MAGIC);
goto fail;
}
err = validate_ec_hdr(ubi, ec_hdr);
if (err) {
- ubi_err("self-check failed for PEB %d", pnum);
+ ubi_err(ubi, "self-check failed for PEB %d", pnum);
goto fail;
}
@@ -1188,7 +1233,7 @@ fail:
* @ubi: UBI device description object
* @pnum: the physical eraseblock number to check
*
- * This function returns zero if the erase counter header is all right and and
+ * This function returns zero if the erase counter header is all right and
* a negative error code if not or if an error occurred.
*/
static int self_check_peb_ec_hdr(const struct ubi_device *ubi, int pnum)
@@ -1211,8 +1256,9 @@ static int self_check_peb_ec_hdr(const struct ubi_device *ubi, int pnum)
crc = crc32(UBI_CRC32_INIT, ec_hdr, UBI_EC_HDR_SIZE_CRC);
hdr_crc = be32_to_cpu(ec_hdr->hdr_crc);
if (hdr_crc != crc) {
- ubi_err("bad CRC, calculated %#08x, read %#08x", crc, hdr_crc);
- ubi_err("self-check failed for PEB %d", pnum);
+ ubi_err(ubi, "bad CRC, calculated %#08x, read %#08x",
+ crc, hdr_crc);
+ ubi_err(ubi, "self-check failed for PEB %d", pnum);
ubi_dump_ec_hdr(ec_hdr);
dump_stack();
err = -EINVAL;
@@ -1246,21 +1292,21 @@ static int self_check_vid_hdr(const struct ubi_device *ubi, int pnum,
magic = be32_to_cpu(vid_hdr->magic);
if (magic != UBI_VID_HDR_MAGIC) {
- ubi_err("bad VID header magic %#08x at PEB %d, must be %#08x",
+ ubi_err(ubi, "bad VID header magic %#08x at PEB %d, must be %#08x",
magic, pnum, UBI_VID_HDR_MAGIC);
goto fail;
}
err = validate_vid_hdr(ubi, vid_hdr);
if (err) {
- ubi_err("self-check failed for PEB %d", pnum);
+ ubi_err(ubi, "self-check failed for PEB %d", pnum);
goto fail;
}
return err;
fail:
- ubi_err("self-check failed for PEB %d", pnum);
+ ubi_err(ubi, "self-check failed for PEB %d", pnum);
ubi_dump_vid_hdr(vid_hdr);
dump_stack();
return -EINVAL;
@@ -1279,28 +1325,30 @@ static int self_check_peb_vid_hdr(const struct ubi_device *ubi, int pnum)
{
int err;
uint32_t crc, hdr_crc;
+ struct ubi_vid_io_buf *vidb;
struct ubi_vid_hdr *vid_hdr;
void *p;
if (!ubi_dbg_chk_io(ubi))
return 0;
- vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
- if (!vid_hdr)
+ vidb = ubi_alloc_vid_buf(ubi, GFP_NOFS);
+ if (!vidb)
return -ENOMEM;
- p = (char *)vid_hdr - ubi->vid_hdr_shift;
+ vid_hdr = ubi_get_vid_hdr(vidb);
+ p = vidb->buffer;
err = ubi_io_read(ubi, p, pnum, ubi->vid_hdr_aloffset,
ubi->vid_hdr_alsize);
if (err && err != UBI_IO_BITFLIPS && !mtd_is_eccerr(err))
goto exit;
- crc = crc32(UBI_CRC32_INIT, vid_hdr, UBI_EC_HDR_SIZE_CRC);
+ crc = crc32(UBI_CRC32_INIT, vid_hdr, UBI_VID_HDR_SIZE_CRC);
hdr_crc = be32_to_cpu(vid_hdr->hdr_crc);
if (hdr_crc != crc) {
- ubi_err("bad VID header CRC at PEB %d, calculated %#08x, read %#08x",
+ ubi_err(ubi, "bad VID header CRC at PEB %d, calculated %#08x, read %#08x",
pnum, crc, hdr_crc);
- ubi_err("self-check failed for PEB %d", pnum);
+ ubi_err(ubi, "self-check failed for PEB %d", pnum);
ubi_dump_vid_hdr(vid_hdr);
dump_stack();
err = -EINVAL;
@@ -1310,7 +1358,7 @@ static int self_check_peb_vid_hdr(const struct ubi_device *ubi, int pnum)
err = self_check_vid_hdr(ubi, pnum, vid_hdr);
exit:
- ubi_free_vid_hdr(ubi, vid_hdr);
+ ubi_free_vid_buf(vidb);
return err;
}
@@ -1337,9 +1385,9 @@ static int self_check_write(struct ubi_device *ubi, const void *buf, int pnum,
if (!ubi_dbg_chk_io(ubi))
return 0;
- buf1 = __vmalloc(len, GFP_NOFS, PAGE_KERNEL);
+ buf1 = __vmalloc(len, GFP_NOFS);
if (!buf1) {
- ubi_err("cannot allocate memory to check writes");
+ ubi_err(ubi, "cannot allocate memory to check writes");
return 0;
}
@@ -1355,15 +1403,15 @@ static int self_check_write(struct ubi_device *ubi, const void *buf, int pnum,
if (c == c1)
continue;
- ubi_err("self-check failed for PEB %d:%d, len %d",
+ ubi_err(ubi, "self-check failed for PEB %d:%d, len %d",
pnum, offset, len);
- ubi_msg("data differ at position %d", i);
+ ubi_msg(ubi, "data differ at position %d", i);
dump_len = max_t(int, 128, len - i);
- ubi_msg("hex dump of the original buffer from %d to %d",
+ ubi_msg(ubi, "hex dump of the original buffer from %d to %d",
i, i + dump_len);
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
buf + i, dump_len, 1);
- ubi_msg("hex dump of the read buffer from %d to %d",
+ ubi_msg(ubi, "hex dump of the read buffer from %d to %d",
i, i + dump_len);
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
buf1 + i, dump_len, 1);
@@ -1401,22 +1449,22 @@ int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len)
if (!ubi_dbg_chk_io(ubi))
return 0;
- buf = __vmalloc(len, GFP_NOFS, PAGE_KERNEL);
+ buf = __vmalloc(len, GFP_NOFS);
if (!buf) {
- ubi_err("cannot allocate memory to check for 0xFFs");
+ ubi_err(ubi, "cannot allocate memory to check for 0xFFs");
return 0;
}
err = mtd_read(ubi->mtd, addr, len, &read, buf);
if (err && !mtd_is_bitflip(err)) {
- ubi_err("error %d while reading %d bytes from PEB %d:%d, read %zd bytes",
+ ubi_err(ubi, "err %d while reading %d bytes from PEB %d:%d, read %zd bytes",
err, len, pnum, offset, read);
goto error;
}
err = ubi_check_pattern(buf, 0xFF, len);
if (err == 0) {
- ubi_err("flash region at PEB %d:%d, length %d does not contain all 0xFF bytes",
+ ubi_err(ubi, "flash region at PEB %d:%d, length %d does not contain all 0xFF bytes",
pnum, offset, len);
goto fail;
}
@@ -1425,8 +1473,8 @@ int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len)
return 0;
fail:
- ubi_err("self-check failed for PEB %d", pnum);
- ubi_msg("hex dump of the %d-%d region", offset, offset + len);
+ ubi_err(ubi, "self-check failed for PEB %d", pnum);
+ ubi_msg(ubi, "hex dump of the %d-%d region", offset, offset + len);
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
err = -EINVAL;
error:
generated by cgit (git 2.34.1) at 2025-12-25 04:53:19 +0000