Merge tag 'upstream-3.7-rc1' of git://git.infradead.org/linux-ubi
Pull UBI changes from Artem Bityutskiy:
"The main change is the way we reserve eraseblocks for bad blocks
handling. We used to reserve 2% of the partition, but now we are more
aggressive and we reserve 2% of the entire chip, which is what
actually manufacturers specify in data sheets. We introduced an
option to users to override the default, though.
There are a couple of fixes as well, and a number of cleanups."
* tag 'upstream-3.7-rc1' of git://git.infradead.org/linux-ubi: (24 commits)
UBI: fix trivial typo 'it' => 'is'
UBI: load after mtd device drivers
UBI: print less
UBI: use pr_ helper instead of printk
UBI: comply with coding style
UBI: erase free PEB with bitflip in EC header
UBI: fix autoresize handling in R/O mode
UBI: add max_beb_per1024 to attach ioctl
UBI: allow specifying bad PEBs limit using module parameter
UBI: check max_beb_per1024 value in ubi_attach_mtd_dev
UBI: prepare for max_beb_per1024 module parameter addition
UBI: introduce MTD_PARAM_MAX_COUNT
UBI: separate bad_peb_limit in a function
arm: sam9_l9260_defconfig: correct CONFIG_MTD_UBI_BEB_LIMIT
UBI: use the whole MTD device size to get bad_peb_limit
mtd: mtdparts: introduce mtd_get_device_size
mtd: mark mtd_is_partition argument as constant
arm: sam9_l9260_defconfig: remove non-existing config option
UBI: kill CONFIG_MTD_UBI_BEB_RESERVE
UBI: limit amount of reserved eraseblocks for bad PEB handling
...
diff --git a/arch/arm/configs/sam9_l9260_defconfig b/arch/arm/configs/sam9_l9260_defconfig
index ecf2531..b4384af 100644
--- a/arch/arm/configs/sam9_l9260_defconfig
+++ b/arch/arm/configs/sam9_l9260_defconfig
@@ -39,7 +39,7 @@
CONFIG_MTD_NAND_ATMEL=y
CONFIG_MTD_NAND_PLATFORM=y
CONFIG_MTD_UBI=y
-CONFIG_MTD_UBI_BEB_RESERVE=3
+CONFIG_MTD_UBI_BEB_LIMIT=25
CONFIG_MTD_UBI_GLUEBI=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_RAM=y
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index d518e4d..3a49e6d 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -744,7 +744,7 @@
return ret;
}
-int mtd_is_partition(struct mtd_info *mtd)
+int mtd_is_partition(const struct mtd_info *mtd)
{
struct mtd_part *part;
int ispart = 0;
@@ -760,3 +760,13 @@
return ispart;
}
EXPORT_SYMBOL_GPL(mtd_is_partition);
+
+/* Returns the size of the entire flash chip */
+uint64_t mtd_get_device_size(const struct mtd_info *mtd)
+{
+ if (!mtd_is_partition(mtd))
+ return mtd->size;
+
+ return PART(mtd)->master->size;
+}
+EXPORT_SYMBOL_GPL(mtd_get_device_size);
diff --git a/drivers/mtd/ubi/Kconfig b/drivers/mtd/ubi/Kconfig
index ea4b95b..271a842 100644
--- a/drivers/mtd/ubi/Kconfig
+++ b/drivers/mtd/ubi/Kconfig
@@ -27,20 +27,34 @@
life-cycle less than 10000, the threshold should be lessened (e.g.,
to 128 or 256, although it does not have to be power of 2).
-config MTD_UBI_BEB_RESERVE
- int "Percentage of reserved eraseblocks for bad eraseblocks handling"
- default 2
- range 0 25
+config MTD_UBI_BEB_LIMIT
+ int "Maximum expected bad eraseblock count per 1024 eraseblocks"
+ default 20
+ range 0 768
help
- If the MTD device admits of bad eraseblocks (e.g. NAND flash), UBI
- reserves some amount of physical eraseblocks to handle new bad
- eraseblocks. For example, if a flash physical eraseblock becomes bad,
- UBI uses these reserved physical eraseblocks to relocate the bad one.
- This option specifies how many physical eraseblocks will be reserved
- for bad eraseblock handling (percents of total number of good flash
- eraseblocks). If the underlying flash does not admit of bad
- eraseblocks (e.g. NOR flash), this value is ignored and nothing is
- reserved. Leave the default value if unsure.
+ This option specifies the maximum bad physical eraseblocks UBI
+ expects on the MTD device (per 1024 eraseblocks). If the underlying
+ flash does not admit of bad eraseblocks (e.g. NOR flash), this value
+ is ignored.
+
+ NAND datasheets often specify the minimum and maximum NVM (Number of
+ Valid Blocks) for the flashes' endurance lifetime. The maximum
+ expected bad eraseblocks per 1024 eraseblocks then can be calculated
+ as "1024 * (1 - MinNVB / MaxNVB)", which gives 20 for most NANDs
+ (MaxNVB is basically the total count of eraseblocks on the chip).
+
+ To put it differently, if this value is 20, UBI will try to reserve
+ about 1.9% of physical eraseblocks for bad blocks handling. And that
+ will be 1.9% of eraseblocks on the entire NAND chip, not just the MTD
+ partition UBI attaches. This means that if you have, say, a NAND
+ flash chip admits maximum 40 bad eraseblocks, and it is split on two
+ MTD partitions of the same size, UBI will reserve 40 eraseblocks when
+ attaching a partition.
+
+ This option can be overridden by the "mtd=" UBI module parameter or
+ by the "attach" ioctl.
+
+ Leave the default value if unsure.
config MTD_UBI_GLUEBI
tristate "MTD devices emulation driver (gluebi)"
diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index bd27cbb..f7adf53 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -79,7 +79,7 @@
* NAND), it is probably a PEB which was being erased when power cut
* happened, so this is corruption type 1. However, this is just a guess,
* which might be wrong.
- * o Otherwise this it corruption type 2.
+ * o Otherwise this is corruption type 2.
*/
#include <linux/err.h>
@@ -378,8 +378,8 @@
if (err == UBI_IO_BITFLIPS)
bitflips = 1;
else {
- ubi_err("VID of PEB %d header is bad, but it "
- "was OK earlier, err %d", pnum, err);
+ ubi_err("VID of PEB %d header is bad, but it was OK earlier, err %d",
+ pnum, err);
if (err > 0)
err = -EIO;
@@ -790,12 +790,12 @@
if (ubi_check_pattern(ubi->peb_buf, 0xFF, ubi->leb_size))
goto out_unlock;
- ubi_err("PEB %d contains corrupted VID header, and the data does not "
- "contain all 0xFF, this may be a non-UBI PEB or a severe VID "
- "header corruption which requires manual inspection", pnum);
+ ubi_err("PEB %d contains corrupted VID header, and the data does not contain all 0xFF",
+ pnum);
+ ubi_err("this may be a non-UBI PEB or a severe VID header corruption which requires manual inspection");
ubi_dump_vid_hdr(vid_hdr);
- dbg_msg("hexdump of PEB %d offset %d, length %d",
- pnum, ubi->leb_start, ubi->leb_size);
+ pr_err("hexdump of PEB %d offset %d, length %d",
+ pnum, ubi->leb_start, ubi->leb_size);
ubi_dbg_print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
ubi->peb_buf, ubi->leb_size, 1);
err = 1;
@@ -907,8 +907,8 @@
ubi->image_seq = image_seq;
if (ubi->image_seq && image_seq &&
ubi->image_seq != image_seq) {
- ubi_err("bad image sequence number %d in PEB %d, "
- "expected %d", image_seq, pnum, ubi->image_seq);
+ ubi_err("bad image sequence number %d in PEB %d, expected %d",
+ image_seq, pnum, ubi->image_seq);
ubi_dump_ec_hdr(ech);
return -EINVAL;
}
@@ -975,7 +975,7 @@
return err;
goto adjust_mean_ec;
case UBI_IO_FF:
- if (ec_err)
+ if (ec_err || bitflips)
err = add_to_list(ai, pnum, UBI_UNKNOWN,
UBI_UNKNOWN, ec, 1, &ai->erase);
else
@@ -997,8 +997,8 @@
/* Unsupported internal volume */
switch (vidh->compat) {
case UBI_COMPAT_DELETE:
- ubi_msg("\"delete\" compatible internal volume %d:%d"
- " found, will remove it", vol_id, lnum);
+ ubi_msg("\"delete\" compatible internal volume %d:%d found, will remove it",
+ vol_id, lnum);
err = add_to_list(ai, pnum, vol_id, lnum,
ec, 1, &ai->erase);
if (err)
@@ -1006,15 +1006,14 @@
return 0;
case UBI_COMPAT_RO:
- ubi_msg("read-only compatible internal volume %d:%d"
- " found, switch to read-only mode",
+ ubi_msg("read-only compatible internal volume %d:%d found, switch to read-only mode",
vol_id, lnum);
ubi->ro_mode = 1;
break;
case UBI_COMPAT_PRESERVE:
- ubi_msg("\"preserve\" compatible internal volume %d:%d"
- " found", vol_id, lnum);
+ ubi_msg("\"preserve\" compatible internal volume %d:%d found",
+ vol_id, lnum);
err = add_to_list(ai, pnum, vol_id, lnum,
ec, 0, &ai->alien);
if (err)
@@ -1075,10 +1074,10 @@
if (ai->corr_peb_count) {
ubi_err("%d PEBs are corrupted and preserved",
ai->corr_peb_count);
- printk(KERN_ERR "Corrupted PEBs are:");
+ pr_err("Corrupted PEBs are:");
list_for_each_entry(aeb, &ai->corr, u.list)
- printk(KERN_CONT " %d", aeb->pnum);
- printk(KERN_CONT "\n");
+ pr_cont(" %d", aeb->pnum);
+ pr_cont("\n");
/*
* If too many PEBs are corrupted, we refuse attaching,
@@ -1112,8 +1111,7 @@
get_random_bytes(&ubi->image_seq,
sizeof(ubi->image_seq));
} else {
- ubi_err("MTD device is not UBI-formatted and possibly "
- "contains non-UBI data - refusing it");
+ ubi_err("MTD device is not UBI-formatted and possibly contains non-UBI data - refusing it");
return -EINVAL;
}
@@ -1172,7 +1170,7 @@
goto out_vidh;
}
- dbg_msg("scanning is finished");
+ ubi_msg("scanning is finished");
/* Calculate mean erase counter */
if (ai->ec_count)
@@ -1244,7 +1242,7 @@
ubi->corr_peb_count = ai->corr_peb_count;
ubi->max_ec = ai->max_ec;
ubi->mean_ec = ai->mean_ec;
- ubi_msg("max. sequence number: %llu", ai->max_sqnum);
+ dbg_gen("max. sequence number: %llu", ai->max_sqnum);
err = ubi_read_volume_table(ubi, ai);
if (err)
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 2c5ed5c..3497703 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -36,6 +36,7 @@
#include <linux/namei.h>
#include <linux/stat.h>
#include <linux/miscdevice.h>
+#include <linux/mtd/partitions.h>
#include <linux/log2.h>
#include <linux/kthread.h>
#include <linux/kernel.h>
@@ -45,6 +46,12 @@
/* Maximum length of the 'mtd=' parameter */
#define MTD_PARAM_LEN_MAX 64
+/* Maximum number of comma-separated items in the 'mtd=' parameter */
+#define MTD_PARAM_MAX_COUNT 3
+
+/* Maximum value for the number of bad PEBs per 1024 PEBs */
+#define MAX_MTD_UBI_BEB_LIMIT 768
+
#ifdef CONFIG_MTD_UBI_MODULE
#define ubi_is_module() 1
#else
@@ -56,10 +63,12 @@
* @name: MTD character device node path, MTD device name, or MTD device number
* string
* @vid_hdr_offs: VID header offset
+ * @max_beb_per1024: maximum expected number of bad PEBs per 1024 PEBs
*/
struct mtd_dev_param {
char name[MTD_PARAM_LEN_MAX];
int vid_hdr_offs;
+ int max_beb_per1024;
};
/* Numbers of elements set in the @mtd_dev_param array */
@@ -564,9 +573,38 @@
}
}
+static int get_bad_peb_limit(const struct ubi_device *ubi, int max_beb_per1024)
+{
+ int limit, device_pebs;
+ uint64_t device_size;
+
+ if (!max_beb_per1024)
+ return 0;
+
+ /*
+ * Here we are using size of the entire flash chip and
+ * not just the MTD partition size because the maximum
+ * number of bad eraseblocks is a percentage of the
+ * whole device and bad eraseblocks are not fairly
+ * distributed over the flash chip. So the worst case
+ * is that all the bad eraseblocks of the chip are in
+ * the MTD partition we are attaching (ubi->mtd).
+ */
+ device_size = mtd_get_device_size(ubi->mtd);
+ device_pebs = mtd_div_by_eb(device_size, ubi->mtd);
+ limit = mult_frac(device_pebs, max_beb_per1024, 1024);
+
+ /* Round it up */
+ if (mult_frac(limit, 1024, max_beb_per1024) < device_pebs)
+ limit += 1;
+
+ return limit;
+}
+
/**
* io_init - initialize I/O sub-system for a given UBI device.
* @ubi: UBI device description object
+ * @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs
*
* If @ubi->vid_hdr_offset or @ubi->leb_start is zero, default offsets are
* assumed:
@@ -579,8 +617,11 @@
* This function returns zero in case of success and a negative error code in
* case of failure.
*/
-static int io_init(struct ubi_device *ubi)
+static int io_init(struct ubi_device *ubi, int max_beb_per1024)
{
+ dbg_gen("sizeof(struct ubi_ainf_peb) %zu", sizeof(struct ubi_ainf_peb));
+ dbg_gen("sizeof(struct ubi_wl_entry) %zu", sizeof(struct ubi_wl_entry));
+
if (ubi->mtd->numeraseregions != 0) {
/*
* Some flashes have several erase regions. Different regions
@@ -607,8 +648,10 @@
ubi->peb_count = mtd_div_by_eb(ubi->mtd->size, ubi->mtd);
ubi->flash_size = ubi->mtd->size;
- if (mtd_can_have_bb(ubi->mtd))
+ if (mtd_can_have_bb(ubi->mtd)) {
ubi->bad_allowed = 1;
+ ubi->bad_peb_limit = get_bad_peb_limit(ubi, max_beb_per1024);
+ }
if (ubi->mtd->type == MTD_NORFLASH) {
ubi_assert(ubi->mtd->writesize == 1);
@@ -650,11 +693,11 @@
ubi->ec_hdr_alsize = ALIGN(UBI_EC_HDR_SIZE, ubi->hdrs_min_io_size);
ubi->vid_hdr_alsize = ALIGN(UBI_VID_HDR_SIZE, ubi->hdrs_min_io_size);
- dbg_msg("min_io_size %d", ubi->min_io_size);
- dbg_msg("max_write_size %d", ubi->max_write_size);
- dbg_msg("hdrs_min_io_size %d", ubi->hdrs_min_io_size);
- dbg_msg("ec_hdr_alsize %d", ubi->ec_hdr_alsize);
- dbg_msg("vid_hdr_alsize %d", ubi->vid_hdr_alsize);
+ dbg_gen("min_io_size %d", ubi->min_io_size);
+ dbg_gen("max_write_size %d", ubi->max_write_size);
+ dbg_gen("hdrs_min_io_size %d", ubi->hdrs_min_io_size);
+ dbg_gen("ec_hdr_alsize %d", ubi->ec_hdr_alsize);
+ dbg_gen("vid_hdr_alsize %d", ubi->vid_hdr_alsize);
if (ubi->vid_hdr_offset == 0)
/* Default offset */
@@ -671,10 +714,10 @@
ubi->leb_start = ubi->vid_hdr_offset + UBI_VID_HDR_SIZE;
ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size);
- dbg_msg("vid_hdr_offset %d", ubi->vid_hdr_offset);
- dbg_msg("vid_hdr_aloffset %d", ubi->vid_hdr_aloffset);
- dbg_msg("vid_hdr_shift %d", ubi->vid_hdr_shift);
- dbg_msg("leb_start %d", ubi->leb_start);
+ dbg_gen("vid_hdr_offset %d", ubi->vid_hdr_offset);
+ dbg_gen("vid_hdr_aloffset %d", ubi->vid_hdr_aloffset);
+ dbg_gen("vid_hdr_shift %d", ubi->vid_hdr_shift);
+ dbg_gen("leb_start %d", ubi->leb_start);
/* The shift must be aligned to 32-bit boundary */
if (ubi->vid_hdr_shift % 4) {
@@ -700,7 +743,7 @@
ubi->max_erroneous = ubi->peb_count / 10;
if (ubi->max_erroneous < 16)
ubi->max_erroneous = 16;
- dbg_msg("max_erroneous %d", ubi->max_erroneous);
+ dbg_gen("max_erroneous %d", ubi->max_erroneous);
/*
* It may happen that EC and VID headers are situated in one minimal
@@ -708,30 +751,18 @@
* read-only mode.
*/
if (ubi->vid_hdr_offset + UBI_VID_HDR_SIZE <= ubi->hdrs_min_io_size) {
- ubi_warn("EC and VID headers are in the same minimal I/O unit, "
- "switch to read-only mode");
+ ubi_warn("EC and VID headers are in the same minimal I/O unit, switch to read-only mode");
ubi->ro_mode = 1;
}
ubi->leb_size = ubi->peb_size - ubi->leb_start;
if (!(ubi->mtd->flags & MTD_WRITEABLE)) {
- ubi_msg("MTD device %d is write-protected, attach in "
- "read-only mode", ubi->mtd->index);
+ ubi_msg("MTD device %d is write-protected, attach in read-only mode",
+ ubi->mtd->index);
ubi->ro_mode = 1;
}
- ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
- ubi->peb_size, ubi->peb_size >> 10);
- ubi_msg("logical eraseblock size: %d bytes", ubi->leb_size);
- ubi_msg("smallest flash I/O unit: %d", ubi->min_io_size);
- if (ubi->hdrs_min_io_size != ubi->min_io_size)
- ubi_msg("sub-page size: %d",
- ubi->hdrs_min_io_size);
- ubi_msg("VID header offset: %d (aligned %d)",
- ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
- ubi_msg("data offset: %d", ubi->leb_start);
-
/*
* Note, ideally, we have to initialize @ubi->bad_peb_count here. But
* unfortunately, MTD does not provide this information. We should loop
@@ -759,6 +790,11 @@
struct ubi_volume *vol = ubi->volumes[vol_id];
int err, old_reserved_pebs = vol->reserved_pebs;
+ if (ubi->ro_mode) {
+ ubi_warn("skip auto-resize because of R/O mode");
+ return 0;
+ }
+
/*
* Clear the auto-resize flag in the volume in-memory copy of the
* volume table, and 'ubi_resize_volume()' will propagate this change
@@ -800,6 +836,7 @@
* @mtd: MTD device description object
* @ubi_num: number to assign to the new UBI device
* @vid_hdr_offset: VID header offset
+ * @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs
*
* This function attaches MTD device @mtd_dev to UBI and assign @ubi_num number
* to the newly created UBI device, unless @ubi_num is %UBI_DEV_NUM_AUTO, in
@@ -810,11 +847,18 @@
* Note, the invocations of this function has to be serialized by the
* @ubi_devices_mutex.
*/
-int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
+int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
+ int vid_hdr_offset, int max_beb_per1024)
{
struct ubi_device *ubi;
int i, err, ref = 0;
+ if (max_beb_per1024 < 0 || max_beb_per1024 > MAX_MTD_UBI_BEB_LIMIT)
+ return -EINVAL;
+
+ if (!max_beb_per1024)
+ max_beb_per1024 = CONFIG_MTD_UBI_BEB_LIMIT;
+
/*
* Check if we already have the same MTD device attached.
*
@@ -839,8 +883,8 @@
* no sense to attach emulated MTD devices, so we prohibit this.
*/
if (mtd->type == MTD_UBIVOLUME) {
- ubi_err("refuse attaching mtd%d - it is already emulated on "
- "top of UBI", mtd->index);
+ ubi_err("refuse attaching mtd%d - it is already emulated on top of UBI",
+ mtd->index);
return -EINVAL;
}
@@ -880,10 +924,8 @@
spin_lock_init(&ubi->volumes_lock);
ubi_msg("attaching mtd%d to ubi%d", mtd->index, ubi_num);
- dbg_msg("sizeof(struct ubi_ainf_peb) %zu", sizeof(struct ubi_ainf_peb));
- dbg_msg("sizeof(struct ubi_wl_entry) %zu", sizeof(struct ubi_wl_entry));
- err = io_init(ubi);
+ err = io_init(ubi, max_beb_per1024);
if (err)
goto out_free;
@@ -924,23 +966,24 @@
goto out_debugfs;
}
- ubi_msg("attached mtd%d to ubi%d", mtd->index, ubi_num);
- ubi_msg("MTD device name: \"%s\"", mtd->name);
- ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20);
- ubi_msg("number of good PEBs: %d", ubi->good_peb_count);
- ubi_msg("number of bad PEBs: %d", ubi->bad_peb_count);
- ubi_msg("number of corrupted PEBs: %d", ubi->corr_peb_count);
- ubi_msg("max. allowed volumes: %d", ubi->vtbl_slots);
- ubi_msg("wear-leveling threshold: %d", CONFIG_MTD_UBI_WL_THRESHOLD);
- ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
- ubi_msg("number of user volumes: %d",
- ubi->vol_count - UBI_INT_VOL_COUNT);
- ubi_msg("available PEBs: %d", ubi->avail_pebs);
- ubi_msg("total number of reserved PEBs: %d", ubi->rsvd_pebs);
- ubi_msg("number of PEBs reserved for bad PEB handling: %d",
- ubi->beb_rsvd_pebs);
- ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
- ubi_msg("image sequence number: %d", ubi->image_seq);
+ ubi_msg("attached mtd%d (name \"%s\", size %llu MiB) to ubi%d",
+ mtd->index, mtd->name, ubi->flash_size >> 20, ubi_num);
+ ubi_msg("PEB size: %d bytes (%d KiB), LEB size: %d bytes",
+ ubi->peb_size, ubi->peb_size >> 10, ubi->leb_size);
+ ubi_msg("min./max. I/O unit sizes: %d/%d, sub-page size %d",
+ ubi->min_io_size, ubi->max_write_size, ubi->hdrs_min_io_size);
+ ubi_msg("VID header offset: %d (aligned %d), data offset: %d",
+ ubi->vid_hdr_offset, ubi->vid_hdr_aloffset, ubi->leb_start);
+ ubi_msg("good PEBs: %d, bad PEBs: %d, corrupted PEBs: %d",
+ ubi->good_peb_count, ubi->bad_peb_count, ubi->corr_peb_count);
+ ubi_msg("user volume: %d, internal volumes: %d, max. volumes count: %d",
+ ubi->vol_count - UBI_INT_VOL_COUNT, UBI_INT_VOL_COUNT,
+ ubi->vtbl_slots);
+ ubi_msg("max/mean erase counter: %d/%d, WL threshold: %d, image sequence number: %u",
+ ubi->max_ec, ubi->mean_ec, CONFIG_MTD_UBI_WL_THRESHOLD,
+ ubi->image_seq);
+ ubi_msg("available PEBs: %d, total reserved PEBs: %d, PEBs reserved for bad PEB handling: %d",
+ ubi->avail_pebs, ubi->rsvd_pebs, ubi->beb_rsvd_pebs);
/*
* The below lock makes sure we do not race with 'ubi_thread()' which
@@ -1017,7 +1060,7 @@
ubi_assert(ubi_num == ubi->ubi_num);
ubi_notify_all(ubi, UBI_VOLUME_REMOVED, NULL);
- dbg_msg("detaching mtd%d from ubi%d", ubi->mtd->index, ubi_num);
+ ubi_msg("detaching mtd%d from ubi%d", ubi->mtd->index, ubi_num);
/*
* Before freeing anything, we have to stop the background thread to
@@ -1172,7 +1215,7 @@
mutex_lock(&ubi_devices_mutex);
err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO,
- p->vid_hdr_offs);
+ p->vid_hdr_offs, p->max_beb_per1024);
mutex_unlock(&ubi_devices_mutex);
if (err < 0) {
ubi_err("cannot attach mtd%d", mtd->index);
@@ -1218,7 +1261,7 @@
ubi_err("UBI error: cannot initialize UBI, error %d", err);
return err;
}
-module_init(ubi_init);
+late_initcall(ubi_init);
static void __exit ubi_exit(void)
{
@@ -1252,8 +1295,7 @@
result = simple_strtoul(str, &endp, 0);
if (str == endp || result >= INT_MAX) {
- printk(KERN_ERR "UBI error: incorrect bytes count: \"%s\"\n",
- str);
+ ubi_err("UBI error: incorrect bytes count: \"%s\"\n", str);
return -EINVAL;
}
@@ -1269,8 +1311,7 @@
case '\0':
break;
default:
- printk(KERN_ERR "UBI error: incorrect bytes count: \"%s\"\n",
- str);
+ ubi_err("UBI error: incorrect bytes count: \"%s\"\n", str);
return -EINVAL;
}
@@ -1291,27 +1332,26 @@
struct mtd_dev_param *p;
char buf[MTD_PARAM_LEN_MAX];
char *pbuf = &buf[0];
- char *tokens[2] = {NULL, NULL};
+ char *tokens[MTD_PARAM_MAX_COUNT];
if (!val)
return -EINVAL;
if (mtd_devs == UBI_MAX_DEVICES) {
- printk(KERN_ERR "UBI error: too many parameters, max. is %d\n",
- UBI_MAX_DEVICES);
+ ubi_err("UBI error: too many parameters, max. is %d\n",
+ UBI_MAX_DEVICES);
return -EINVAL;
}
len = strnlen(val, MTD_PARAM_LEN_MAX);
if (len == MTD_PARAM_LEN_MAX) {
- printk(KERN_ERR "UBI error: parameter \"%s\" is too long, "
- "max. is %d\n", val, MTD_PARAM_LEN_MAX);
+ ubi_err("UBI error: parameter \"%s\" is too long, max. is %d\n",
+ val, MTD_PARAM_LEN_MAX);
return -EINVAL;
}
if (len == 0) {
- printk(KERN_WARNING "UBI warning: empty 'mtd=' parameter - "
- "ignored\n");
+ pr_warn("UBI warning: empty 'mtd=' parameter - ignored\n");
return 0;
}
@@ -1321,12 +1361,11 @@
if (buf[len - 1] == '\n')
buf[len - 1] = '\0';
- for (i = 0; i < 2; i++)
+ for (i = 0; i < MTD_PARAM_MAX_COUNT; i++)
tokens[i] = strsep(&pbuf, ",");
if (pbuf) {
- printk(KERN_ERR "UBI error: too many arguments at \"%s\"\n",
- val);
+ ubi_err("UBI error: too many arguments at \"%s\"\n", val);
return -EINVAL;
}
@@ -1339,23 +1378,32 @@
if (p->vid_hdr_offs < 0)
return p->vid_hdr_offs;
+ if (tokens[2]) {
+ int err = kstrtoint(tokens[2], 10, &p->max_beb_per1024);
+
+ if (err) {
+ ubi_err("UBI error: bad value for max_beb_per1024 parameter: %s",
+ tokens[2]);
+ return -EINVAL;
+ }
+ }
+
mtd_devs += 1;
return 0;
}
module_param_call(mtd, ubi_mtd_param_parse, NULL, NULL, 000);
-MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: "
- "mtd=<name|num|path>[,<vid_hdr_offs>].\n"
+MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: mtd=<name|num|path>[,<vid_hdr_offs>[,max_beb_per1024]].\n"
"Multiple \"mtd\" parameters may be specified.\n"
- "MTD devices may be specified by their number, name, or "
- "path to the MTD character device node.\n"
- "Optional \"vid_hdr_offs\" parameter specifies UBI VID "
- "header position to be used by UBI.\n"
- "Example 1: mtd=/dev/mtd0 - attach MTD device "
- "/dev/mtd0.\n"
- "Example 2: mtd=content,1984 mtd=4 - attach MTD device "
- "with name \"content\" using VID header offset 1984, and "
- "MTD device number 4 with default VID header offset.");
+ "MTD devices may be specified by their number, name, or path to the MTD character device node.\n"
+ "Optional \"vid_hdr_offs\" parameter specifies UBI VID header position to be used by UBI. (default value if 0)\n"
+ "Optional \"max_beb_per1024\" parameter specifies the maximum expected bad eraseblock per 1024 eraseblocks. (default value ("
+ __stringify(CONFIG_MTD_UBI_BEB_LIMIT) ") if 0)\n"
+ "\n"
+ "Example 1: mtd=/dev/mtd0 - attach MTD device /dev/mtd0.\n"
+ "Example 2: mtd=content,1984 mtd=4 - attach MTD device with name \"content\" using VID header offset 1984, and MTD device number 4 with default VID header offset.\n"
+ "Example 3: mtd=/dev/mtd1,0,25 - attach MTD device /dev/mtd1 using default VID header offset and reserve 25*nand_size_in_blocks/1024 erase blocks for bad block handling.\n"
+ "\t(e.g. if the NAND *chipset* has 4096 PEB, 100 will be reserved for this UBI device).");
MODULE_VERSION(__stringify(UBI_VERSION));
MODULE_DESCRIPTION("UBI - Unsorted Block Images");
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index fb55678..dfcc65b 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -140,9 +140,9 @@
vol->updating = 0;
vfree(vol->upd_buf);
} else if (vol->changing_leb) {
- dbg_gen("only %lld of %lld bytes received for atomic LEB change"
- " for volume %d:%d, cancel", vol->upd_received,
- vol->upd_bytes, vol->ubi->ubi_num, vol->vol_id);
+ dbg_gen("only %lld of %lld bytes received for atomic LEB change for volume %d:%d, cancel",
+ vol->upd_received, vol->upd_bytes, vol->ubi->ubi_num,
+ vol->vol_id);
vol->changing_leb = 0;
vfree(vol->upd_buf);
}
@@ -189,7 +189,8 @@
return new_offset;
}
-static int vol_cdev_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+static int vol_cdev_fsync(struct file *file, loff_t start, loff_t end,
+ int datasync)
{
struct ubi_volume_desc *desc = file->private_data;
struct ubi_device *ubi = desc->vol->ubi;
@@ -753,7 +754,7 @@
re->new_name_len = name_len;
memcpy(re->new_name, name, name_len);
list_add_tail(&re->list, &rename_list);
- dbg_msg("will rename volume %d from \"%s\" to \"%s\"",
+ dbg_gen("will rename volume %d from \"%s\" to \"%s\"",
vol_id, re->desc->vol->name, name);
}
@@ -811,7 +812,7 @@
re1->remove = 1;
re1->desc = desc;
list_add(&re1->list, &rename_list);
- dbg_msg("will remove volume %d, name \"%s\"",
+ dbg_gen("will remove volume %d, name \"%s\"",
re1->desc->vol->vol_id, re1->desc->vol->name);
}
@@ -942,7 +943,7 @@
{
struct ubi_rnvol_req *req;
- dbg_msg("re-name volumes");
+ dbg_gen("re-name volumes");
req = kmalloc(sizeof(struct ubi_rnvol_req), GFP_KERNEL);
if (!req) {
err = -ENOMEM;
@@ -1010,7 +1011,8 @@
* 'ubi_attach_mtd_dev()'.
*/
mutex_lock(&ubi_devices_mutex);
- err = ubi_attach_mtd_dev(mtd, req.ubi_num, req.vid_hdr_offset);
+ err = ubi_attach_mtd_dev(mtd, req.ubi_num, req.vid_hdr_offset,
+ req.max_beb_per1024);
mutex_unlock(&ubi_devices_mutex);
if (err < 0)
put_mtd_device(mtd);
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index 7c13803..26908a5 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -43,8 +43,8 @@
return;
err = mtd_read(ubi->mtd, addr, len, &read, buf);
if (err && err != -EUCLEAN) {
- ubi_err("error %d while reading %d bytes from PEB %d:%d, "
- "read %zd bytes", err, len, pnum, offset, read);
+ ubi_err("error %d while reading %d bytes from PEB %d:%d, read %zd bytes",
+ err, len, pnum, offset, read);
goto out;
}
@@ -62,21 +62,15 @@
*/
void ubi_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr)
{
- printk(KERN_DEBUG "Erase counter header dump:\n");
- printk(KERN_DEBUG "\tmagic %#08x\n",
- be32_to_cpu(ec_hdr->magic));
- printk(KERN_DEBUG "\tversion %d\n", (int)ec_hdr->version);
- printk(KERN_DEBUG "\tec %llu\n",
- (long long)be64_to_cpu(ec_hdr->ec));
- printk(KERN_DEBUG "\tvid_hdr_offset %d\n",
- be32_to_cpu(ec_hdr->vid_hdr_offset));
- printk(KERN_DEBUG "\tdata_offset %d\n",
- be32_to_cpu(ec_hdr->data_offset));
- printk(KERN_DEBUG "\timage_seq %d\n",
- be32_to_cpu(ec_hdr->image_seq));
- printk(KERN_DEBUG "\thdr_crc %#08x\n",
- be32_to_cpu(ec_hdr->hdr_crc));
- printk(KERN_DEBUG "erase counter header hexdump:\n");
+ pr_err("Erase counter header dump:\n");
+ pr_err("\tmagic %#08x\n", be32_to_cpu(ec_hdr->magic));
+ pr_err("\tversion %d\n", (int)ec_hdr->version);
+ pr_err("\tec %llu\n", (long long)be64_to_cpu(ec_hdr->ec));
+ pr_err("\tvid_hdr_offset %d\n", be32_to_cpu(ec_hdr->vid_hdr_offset));
+ pr_err("\tdata_offset %d\n", be32_to_cpu(ec_hdr->data_offset));
+ pr_err("\timage_seq %d\n", be32_to_cpu(ec_hdr->image_seq));
+ pr_err("\thdr_crc %#08x\n", be32_to_cpu(ec_hdr->hdr_crc));
+ pr_err("erase counter header hexdump:\n");
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
ec_hdr, UBI_EC_HDR_SIZE, 1);
}
@@ -87,21 +81,21 @@
*/
void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr)
{
- printk(KERN_DEBUG "Volume identifier header dump:\n");
- printk(KERN_DEBUG "\tmagic %08x\n", be32_to_cpu(vid_hdr->magic));
- printk(KERN_DEBUG "\tversion %d\n", (int)vid_hdr->version);
- printk(KERN_DEBUG "\tvol_type %d\n", (int)vid_hdr->vol_type);
- printk(KERN_DEBUG "\tcopy_flag %d\n", (int)vid_hdr->copy_flag);
- printk(KERN_DEBUG "\tcompat %d\n", (int)vid_hdr->compat);
- printk(KERN_DEBUG "\tvol_id %d\n", be32_to_cpu(vid_hdr->vol_id));
- printk(KERN_DEBUG "\tlnum %d\n", be32_to_cpu(vid_hdr->lnum));
- printk(KERN_DEBUG "\tdata_size %d\n", be32_to_cpu(vid_hdr->data_size));
- printk(KERN_DEBUG "\tused_ebs %d\n", be32_to_cpu(vid_hdr->used_ebs));
- printk(KERN_DEBUG "\tdata_pad %d\n", be32_to_cpu(vid_hdr->data_pad));
- printk(KERN_DEBUG "\tsqnum %llu\n",
+ pr_err("Volume identifier header dump:\n");
+ pr_err("\tmagic %08x\n", be32_to_cpu(vid_hdr->magic));
+ pr_err("\tversion %d\n", (int)vid_hdr->version);
+ pr_err("\tvol_type %d\n", (int)vid_hdr->vol_type);
+ pr_err("\tcopy_flag %d\n", (int)vid_hdr->copy_flag);
+ pr_err("\tcompat %d\n", (int)vid_hdr->compat);
+ pr_err("\tvol_id %d\n", be32_to_cpu(vid_hdr->vol_id));
+ pr_err("\tlnum %d\n", be32_to_cpu(vid_hdr->lnum));
+ pr_err("\tdata_size %d\n", be32_to_cpu(vid_hdr->data_size));
+ pr_err("\tused_ebs %d\n", be32_to_cpu(vid_hdr->used_ebs));
+ pr_err("\tdata_pad %d\n", be32_to_cpu(vid_hdr->data_pad));
+ pr_err("\tsqnum %llu\n",
(unsigned long long)be64_to_cpu(vid_hdr->sqnum));
- printk(KERN_DEBUG "\thdr_crc %08x\n", be32_to_cpu(vid_hdr->hdr_crc));
- printk(KERN_DEBUG "Volume identifier header hexdump:\n");
+ pr_err("\thdr_crc %08x\n", be32_to_cpu(vid_hdr->hdr_crc));
+ pr_err("Volume identifier header hexdump:\n");
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
vid_hdr, UBI_VID_HDR_SIZE, 1);
}
@@ -112,25 +106,25 @@
*/
void ubi_dump_vol_info(const struct ubi_volume *vol)
{
- printk(KERN_DEBUG "Volume information dump:\n");
- printk(KERN_DEBUG "\tvol_id %d\n", vol->vol_id);
- printk(KERN_DEBUG "\treserved_pebs %d\n", vol->reserved_pebs);
- printk(KERN_DEBUG "\talignment %d\n", vol->alignment);
- printk(KERN_DEBUG "\tdata_pad %d\n", vol->data_pad);
- printk(KERN_DEBUG "\tvol_type %d\n", vol->vol_type);
- printk(KERN_DEBUG "\tname_len %d\n", vol->name_len);
- printk(KERN_DEBUG "\tusable_leb_size %d\n", vol->usable_leb_size);
- printk(KERN_DEBUG "\tused_ebs %d\n", vol->used_ebs);
- printk(KERN_DEBUG "\tused_bytes %lld\n", vol->used_bytes);
- printk(KERN_DEBUG "\tlast_eb_bytes %d\n", vol->last_eb_bytes);
- printk(KERN_DEBUG "\tcorrupted %d\n", vol->corrupted);
- printk(KERN_DEBUG "\tupd_marker %d\n", vol->upd_marker);
+ pr_err("Volume information dump:\n");
+ pr_err("\tvol_id %d\n", vol->vol_id);
+ pr_err("\treserved_pebs %d\n", vol->reserved_pebs);
+ pr_err("\talignment %d\n", vol->alignment);
+ pr_err("\tdata_pad %d\n", vol->data_pad);
+ pr_err("\tvol_type %d\n", vol->vol_type);
+ pr_err("\tname_len %d\n", vol->name_len);
+ pr_err("\tusable_leb_size %d\n", vol->usable_leb_size);
+ pr_err("\tused_ebs %d\n", vol->used_ebs);
+ pr_err("\tused_bytes %lld\n", vol->used_bytes);
+ pr_err("\tlast_eb_bytes %d\n", vol->last_eb_bytes);
+ pr_err("\tcorrupted %d\n", vol->corrupted);
+ pr_err("\tupd_marker %d\n", vol->upd_marker);
if (vol->name_len <= UBI_VOL_NAME_MAX &&
strnlen(vol->name, vol->name_len + 1) == vol->name_len) {
- printk(KERN_DEBUG "\tname %s\n", vol->name);
+ pr_err("\tname %s\n", vol->name);
} else {
- printk(KERN_DEBUG "\t1st 5 characters of name: %c%c%c%c%c\n",
+ pr_err("\t1st 5 characters of name: %c%c%c%c%c\n",
vol->name[0], vol->name[1], vol->name[2],
vol->name[3], vol->name[4]);
}
@@ -145,29 +139,28 @@
{
int name_len = be16_to_cpu(r->name_len);
- printk(KERN_DEBUG "Volume table record %d dump:\n", idx);
- printk(KERN_DEBUG "\treserved_pebs %d\n",
- be32_to_cpu(r->reserved_pebs));
- printk(KERN_DEBUG "\talignment %d\n", be32_to_cpu(r->alignment));
- printk(KERN_DEBUG "\tdata_pad %d\n", be32_to_cpu(r->data_pad));
- printk(KERN_DEBUG "\tvol_type %d\n", (int)r->vol_type);
- printk(KERN_DEBUG "\tupd_marker %d\n", (int)r->upd_marker);
- printk(KERN_DEBUG "\tname_len %d\n", name_len);
+ pr_err("Volume table record %d dump:\n", idx);
+ pr_err("\treserved_pebs %d\n", be32_to_cpu(r->reserved_pebs));
+ pr_err("\talignment %d\n", be32_to_cpu(r->alignment));
+ pr_err("\tdata_pad %d\n", be32_to_cpu(r->data_pad));
+ pr_err("\tvol_type %d\n", (int)r->vol_type);
+ pr_err("\tupd_marker %d\n", (int)r->upd_marker);
+ pr_err("\tname_len %d\n", name_len);
if (r->name[0] == '\0') {
- printk(KERN_DEBUG "\tname NULL\n");
+ pr_err("\tname NULL\n");
return;
}
if (name_len <= UBI_VOL_NAME_MAX &&
strnlen(&r->name[0], name_len + 1) == name_len) {
- printk(KERN_DEBUG "\tname %s\n", &r->name[0]);
+ pr_err("\tname %s\n", &r->name[0]);
} else {
- printk(KERN_DEBUG "\t1st 5 characters of name: %c%c%c%c%c\n",
+ pr_err("\t1st 5 characters of name: %c%c%c%c%c\n",
r->name[0], r->name[1], r->name[2], r->name[3],
r->name[4]);
}
- printk(KERN_DEBUG "\tcrc %#08x\n", be32_to_cpu(r->crc));
+ pr_err("\tcrc %#08x\n", be32_to_cpu(r->crc));
}
/**
@@ -176,15 +169,15 @@
*/
void ubi_dump_av(const struct ubi_ainf_volume *av)
{
- printk(KERN_DEBUG "Volume attaching information dump:\n");
- printk(KERN_DEBUG "\tvol_id %d\n", av->vol_id);
- printk(KERN_DEBUG "\thighest_lnum %d\n", av->highest_lnum);
- printk(KERN_DEBUG "\tleb_count %d\n", av->leb_count);
- printk(KERN_DEBUG "\tcompat %d\n", av->compat);
- printk(KERN_DEBUG "\tvol_type %d\n", av->vol_type);
- printk(KERN_DEBUG "\tused_ebs %d\n", av->used_ebs);
- printk(KERN_DEBUG "\tlast_data_size %d\n", av->last_data_size);
- printk(KERN_DEBUG "\tdata_pad %d\n", av->data_pad);
+ pr_err("Volume attaching information dump:\n");
+ pr_err("\tvol_id %d\n", av->vol_id);
+ pr_err("\thighest_lnum %d\n", av->highest_lnum);
+ pr_err("\tleb_count %d\n", av->leb_count);
+ pr_err("\tcompat %d\n", av->compat);
+ pr_err("\tvol_type %d\n", av->vol_type);
+ pr_err("\tused_ebs %d\n", av->used_ebs);
+ pr_err("\tlast_data_size %d\n", av->last_data_size);
+ pr_err("\tdata_pad %d\n", av->data_pad);
}
/**
@@ -194,13 +187,13 @@
*/
void ubi_dump_aeb(const struct ubi_ainf_peb *aeb, int type)
{
- printk(KERN_DEBUG "eraseblock attaching information dump:\n");
- printk(KERN_DEBUG "\tec %d\n", aeb->ec);
- printk(KERN_DEBUG "\tpnum %d\n", aeb->pnum);
+ pr_err("eraseblock attaching information dump:\n");
+ pr_err("\tec %d\n", aeb->ec);
+ pr_err("\tpnum %d\n", aeb->pnum);
if (type == 0) {
- printk(KERN_DEBUG "\tlnum %d\n", aeb->lnum);
- printk(KERN_DEBUG "\tscrub %d\n", aeb->scrub);
- printk(KERN_DEBUG "\tsqnum %llu\n", aeb->sqnum);
+ pr_err("\tlnum %d\n", aeb->lnum);
+ pr_err("\tscrub %d\n", aeb->scrub);
+ pr_err("\tsqnum %llu\n", aeb->sqnum);
}
}
@@ -212,16 +205,16 @@
{
char nm[17];
- printk(KERN_DEBUG "Volume creation request dump:\n");
- printk(KERN_DEBUG "\tvol_id %d\n", req->vol_id);
- printk(KERN_DEBUG "\talignment %d\n", req->alignment);
- printk(KERN_DEBUG "\tbytes %lld\n", (long long)req->bytes);
- printk(KERN_DEBUG "\tvol_type %d\n", req->vol_type);
- printk(KERN_DEBUG "\tname_len %d\n", req->name_len);
+ pr_err("Volume creation request dump:\n");
+ pr_err("\tvol_id %d\n", req->vol_id);
+ pr_err("\talignment %d\n", req->alignment);
+ pr_err("\tbytes %lld\n", (long long)req->bytes);
+ pr_err("\tvol_type %d\n", req->vol_type);
+ pr_err("\tname_len %d\n", req->name_len);
memcpy(nm, req->name, 16);
nm[16] = 0;
- printk(KERN_DEBUG "\t1st 16 characters of name: %s\n", nm);
+ pr_err("\t1st 16 characters of name: %s\n", nm);
}
/**
diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h
index d5d2645..3dbc877 100644
--- a/drivers/mtd/ubi/debug.h
+++ b/drivers/mtd/ubi/debug.h
@@ -29,22 +29,18 @@
#define ubi_assert(expr) do { \
if (unlikely(!(expr))) { \
- printk(KERN_CRIT "UBI assert failed in %s at %u (pid %d)\n", \
+ pr_crit("UBI assert failed in %s at %u (pid %d)\n", \
__func__, __LINE__, current->pid); \
dump_stack(); \
} \
} while (0)
-#define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a) \
+#define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a) \
print_hex_dump(l, ps, pt, r, g, b, len, a)
#define ubi_dbg_msg(type, fmt, ...) \
- pr_debug("UBI DBG " type ": " fmt "\n", ##__VA_ARGS__)
-
-/* Just a debugging messages not related to any specific UBI subsystem */
-#define dbg_msg(fmt, ...) \
- printk(KERN_DEBUG "UBI DBG (pid %d): %s: " fmt "\n", \
- current->pid, __func__, ##__VA_ARGS__)
+ pr_debug("UBI DBG " type " (pid %d): " fmt "\n", current->pid, \
+ ##__VA_ARGS__)
/* General debugging messages */
#define dbg_gen(fmt, ...) ubi_dbg_msg("gen", fmt, ##__VA_ARGS__)
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index b703ac7..a26d7d2 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -420,9 +420,8 @@
*/
if (err == UBI_IO_BAD_HDR_EBADMSG ||
err == UBI_IO_BAD_HDR) {
- ubi_warn("corrupted VID header at PEB "
- "%d, LEB %d:%d", pnum, vol_id,
- lnum);
+ ubi_warn("corrupted VID header at PEB %d, LEB %d:%d",
+ pnum, vol_id, lnum);
err = -EBADMSG;
} else
ubi_ro_mode(ubi);
@@ -660,9 +659,8 @@
if (len) {
err = ubi_io_write_data(ubi, buf, pnum, offset, len);
if (err) {
- ubi_warn("failed to write %d bytes at offset %d of "
- "LEB %d:%d, PEB %d", len, offset, vol_id,
- lnum, pnum);
+ ubi_warn("failed to write %d bytes at offset %d of LEB %d:%d, PEB %d",
+ len, offset, vol_id, lnum, pnum);
goto write_error;
}
}
@@ -1040,9 +1038,8 @@
* cancel it.
*/
if (vol->eba_tbl[lnum] != from) {
- dbg_wl("LEB %d:%d is no longer mapped to PEB %d, mapped to "
- "PEB %d, cancel", vol_id, lnum, from,
- vol->eba_tbl[lnum]);
+ dbg_wl("LEB %d:%d is no longer mapped to PEB %d, mapped to PEB %d, cancel",
+ vol_id, lnum, from, vol->eba_tbl[lnum]);
err = MOVE_CANCEL_RACE;
goto out_unlock_leb;
}
@@ -1107,8 +1104,8 @@
err = ubi_io_read_vid_hdr(ubi, to, vid_hdr, 1);
if (err) {
if (err != UBI_IO_BITFLIPS) {
- ubi_warn("error %d while reading VID header back from "
- "PEB %d", err, to);
+ ubi_warn("error %d while reading VID header back from PEB %d",
+ err, to);
if (is_error_sane(err))
err = MOVE_TARGET_RD_ERR;
} else
@@ -1134,8 +1131,8 @@
err = ubi_io_read_data(ubi, ubi->peb_buf, to, 0, aldata_size);
if (err) {
if (err != UBI_IO_BITFLIPS) {
- ubi_warn("error %d while reading data back "
- "from PEB %d", err, to);
+ ubi_warn("error %d while reading data back from PEB %d",
+ err, to);
if (is_error_sane(err))
err = MOVE_TARGET_RD_ERR;
} else
@@ -1146,8 +1143,8 @@
cond_resched();
if (crc != crc32(UBI_CRC32_INIT, ubi->peb_buf, data_size)) {
- ubi_warn("read data back from PEB %d and it is "
- "different", to);
+ ubi_warn("read data back from PEB %d and it is different",
+ to);
err = -EINVAL;
goto out_unlock_buf;
}
@@ -1197,11 +1194,11 @@
return;
}
- ubi_warn("cannot reserve enough PEBs for bad PEB handling, reserved %d,"
- " need %d", ubi->beb_rsvd_pebs, ubi->beb_rsvd_level);
+ ubi_warn("cannot reserve enough PEBs for bad PEB handling, reserved %d, need %d",
+ ubi->beb_rsvd_pebs, ubi->beb_rsvd_level);
if (ubi->corr_peb_count)
ubi_warn("%d PEBs are corrupted and not used",
- ubi->corr_peb_count);
+ ubi->corr_peb_count);
}
/**
diff --git a/drivers/mtd/ubi/gluebi.c b/drivers/mtd/ubi/gluebi.c
index 4e44bee..4bd4db8 100644
--- a/drivers/mtd/ubi/gluebi.c
+++ b/drivers/mtd/ubi/gluebi.c
@@ -41,7 +41,7 @@
#include "ubi-media.h"
#define err_msg(fmt, ...) \
- printk(KERN_DEBUG "gluebi (pid %d): %s: " fmt "\n", \
+ pr_err("gluebi (pid %d): %s: " fmt "\n", \
current->pid, __func__, ##__VA_ARGS__)
/**
@@ -341,9 +341,8 @@
mutex_lock(&devices_mutex);
g = find_gluebi_nolock(vi->ubi_num, vi->vol_id);
if (g)
- err_msg("gluebi MTD device %d form UBI device %d volume %d "
- "already exists", g->mtd.index, vi->ubi_num,
- vi->vol_id);
+ err_msg("gluebi MTD device %d form UBI device %d volume %d already exists",
+ g->mtd.index, vi->ubi_num, vi->vol_id);
mutex_unlock(&devices_mutex);
if (mtd_device_register(mtd, NULL, 0)) {
@@ -376,8 +375,8 @@
mutex_lock(&devices_mutex);
gluebi = find_gluebi_nolock(vi->ubi_num, vi->vol_id);
if (!gluebi) {
- err_msg("got remove notification for unknown UBI device %d "
- "volume %d", vi->ubi_num, vi->vol_id);
+ err_msg("got remove notification for unknown UBI device %d volume %d",
+ vi->ubi_num, vi->vol_id);
err = -ENOENT;
} else if (gluebi->refcnt)
err = -EBUSY;
@@ -390,9 +389,8 @@
mtd = &gluebi->mtd;
err = mtd_device_unregister(mtd);
if (err) {
- err_msg("cannot remove fake MTD device %d, UBI device %d, "
- "volume %d, error %d", mtd->index, gluebi->ubi_num,
- gluebi->vol_id, err);
+ err_msg("cannot remove fake MTD device %d, UBI device %d, volume %d, error %d",
+ mtd->index, gluebi->ubi_num, gluebi->vol_id, err);
mutex_lock(&devices_mutex);
list_add_tail(&gluebi->list, &gluebi_devices);
mutex_unlock(&devices_mutex);
@@ -422,8 +420,8 @@
gluebi = find_gluebi_nolock(vi->ubi_num, vi->vol_id);
if (!gluebi) {
mutex_unlock(&devices_mutex);
- err_msg("got update notification for unknown UBI device %d "
- "volume %d", vi->ubi_num, vi->vol_id);
+ err_msg("got update notification for unknown UBI device %d volume %d",
+ vi->ubi_num, vi->vol_id);
return -ENOENT;
}
@@ -449,8 +447,8 @@
gluebi = find_gluebi_nolock(vi->ubi_num, vi->vol_id);
if (!gluebi) {
mutex_unlock(&devices_mutex);
- err_msg("got update notification for unknown UBI device %d "
- "volume %d", vi->ubi_num, vi->vol_id);
+ err_msg("got update notification for unknown UBI device %d volume %d",
+ vi->ubi_num, vi->vol_id);
return -ENOENT;
}
gluebi->mtd.size = vi->used_bytes;
@@ -507,9 +505,9 @@
err = mtd_device_unregister(mtd);
if (err)
- err_msg("error %d while removing gluebi MTD device %d, "
- "UBI device %d, volume %d - ignoring", err,
- mtd->index, gluebi->ubi_num, gluebi->vol_id);
+ err_msg("error %d while removing gluebi MTD device %d, UBI device %d, volume %d - ignoring",
+ err, mtd->index, gluebi->ubi_num,
+ gluebi->vol_id);
kfree(mtd->name);
kfree(gluebi);
}
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index a8d5237..78a1dcb 100644
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -177,21 +177,20 @@
* enabled. A corresponding message will be printed
* later, when it is has been scrubbed.
*/
- dbg_msg("fixable bit-flip detected at PEB %d", pnum);
+ ubi_msg("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("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", err, errstr, len, pnum, offset, read);
+ ubi_err("error %d%s while reading %d bytes from PEB %d:%d, read %zd bytes",
+ err, errstr, len, pnum, offset, read);
dump_stack();
/*
@@ -274,8 +273,8 @@
}
if (ubi_dbg_is_write_failure(ubi)) {
- ubi_err("cannot write %d bytes to PEB %d:%d "
- "(emulated)", len, pnum, offset);
+ ubi_err("cannot write %d bytes to PEB %d:%d (emulated)",
+ len, pnum, offset);
dump_stack();
return -EIO;
}
@@ -283,8 +282,8 @@
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", err, len, pnum, offset, written);
+ ubi_err("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);
} else
@@ -685,8 +684,7 @@
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("node with incompatible UBI version found: this UBI version is %d, image version is %d",
UBI_VERSION, (int)ec_hdr->version);
goto bad;
}
@@ -777,10 +775,10 @@
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", pnum);
- dbg_bld("no EC header found at PEB %d, "
- "only 0xFF bytes", pnum);
+ ubi_warn("no EC header found at PEB %d, only 0xFF bytes",
+ pnum);
+ dbg_bld("no EC header found at PEB %d, only 0xFF bytes",
+ pnum);
if (!read_err)
return UBI_IO_FF;
else
@@ -792,12 +790,12 @@
* 0xFF bytes. Report that the header is corrupted.
*/
if (verbose) {
- ubi_warn("bad magic number at PEB %d: %08x instead of "
- "%08x", pnum, magic, UBI_EC_HDR_MAGIC);
+ ubi_warn("bad magic number at PEB %d: %08x instead of %08x",
+ pnum, magic, UBI_EC_HDR_MAGIC);
ubi_dump_ec_hdr(ec_hdr);
}
- dbg_bld("bad magic number at PEB %d: %08x instead of "
- "%08x", pnum, magic, UBI_EC_HDR_MAGIC);
+ dbg_bld("bad magic number at PEB %d: %08x instead of %08x",
+ pnum, magic, UBI_EC_HDR_MAGIC);
return UBI_IO_BAD_HDR;
}
@@ -806,12 +804,12 @@
if (hdr_crc != crc) {
if (verbose) {
- ubi_warn("bad EC header CRC at PEB %d, calculated "
- "%#08x, read %#08x", pnum, crc, hdr_crc);
+ ubi_warn("bad EC header CRC at PEB %d, calculated %#08x, read %#08x",
+ pnum, crc, hdr_crc);
ubi_dump_ec_hdr(ec_hdr);
}
- dbg_bld("bad EC header CRC at PEB %d, calculated "
- "%#08x, read %#08x", pnum, crc, hdr_crc);
+ dbg_bld("bad EC header CRC at PEB %d, calculated %#08x, read %#08x",
+ pnum, crc, hdr_crc);
if (!read_err)
return UBI_IO_BAD_HDR;
@@ -1032,10 +1030,10 @@
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", pnum);
- dbg_bld("no VID header found at PEB %d, "
- "only 0xFF bytes", pnum);
+ ubi_warn("no VID header found at PEB %d, only 0xFF bytes",
+ pnum);
+ dbg_bld("no VID header found at PEB %d, only 0xFF bytes",
+ pnum);
if (!read_err)
return UBI_IO_FF;
else
@@ -1043,12 +1041,12 @@
}
if (verbose) {
- ubi_warn("bad magic number at PEB %d: %08x instead of "
- "%08x", pnum, magic, UBI_VID_HDR_MAGIC);
+ ubi_warn("bad magic number at PEB %d: %08x instead of %08x",
+ pnum, magic, UBI_VID_HDR_MAGIC);
ubi_dump_vid_hdr(vid_hdr);
}
- dbg_bld("bad magic number at PEB %d: %08x instead of "
- "%08x", pnum, magic, UBI_VID_HDR_MAGIC);
+ dbg_bld("bad magic number at PEB %d: %08x instead of %08x",
+ pnum, magic, UBI_VID_HDR_MAGIC);
return UBI_IO_BAD_HDR;
}
@@ -1057,12 +1055,12 @@
if (hdr_crc != crc) {
if (verbose) {
- ubi_warn("bad CRC at PEB %d, calculated %#08x, "
- "read %#08x", pnum, crc, hdr_crc);
+ ubi_warn("bad CRC at PEB %d, calculated %#08x, read %#08x",
+ pnum, crc, hdr_crc);
ubi_dump_vid_hdr(vid_hdr);
}
- dbg_bld("bad CRC at PEB %d, calculated %#08x, "
- "read %#08x", pnum, crc, hdr_crc);
+ dbg_bld("bad CRC at PEB %d, calculated %#08x, read %#08x",
+ pnum, crc, hdr_crc);
if (!read_err)
return UBI_IO_BAD_HDR;
else
@@ -1300,8 +1298,8 @@
crc = crc32(UBI_CRC32_INIT, vid_hdr, UBI_EC_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", pnum, crc, hdr_crc);
+ ubi_err("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_dump_vid_hdr(vid_hdr);
dump_stack();
@@ -1411,15 +1409,15 @@
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", err, len, pnum, offset, read);
+ ubi_err("error %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", pnum, offset, len);
+ ubi_err("flash region at PEB %d:%d, length %d does not contain all 0xFF bytes",
+ pnum, offset, len);
goto fail;
}
diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c
index 8bbfb44..f913d70 100644
--- a/drivers/mtd/ubi/misc.c
+++ b/drivers/mtd/ubi/misc.c
@@ -121,10 +121,16 @@
*/
void ubi_calculate_reserved(struct ubi_device *ubi)
{
- ubi->beb_rsvd_level = ubi->good_peb_count/100;
- ubi->beb_rsvd_level *= CONFIG_MTD_UBI_BEB_RESERVE;
- if (ubi->beb_rsvd_level < MIN_RESEVED_PEBS)
- ubi->beb_rsvd_level = MIN_RESEVED_PEBS;
+ /*
+ * Calculate the actual number of PEBs currently needed to be reserved
+ * for future bad eraseblock handling.
+ */
+ ubi->beb_rsvd_level = ubi->bad_peb_limit - ubi->bad_peb_count;
+ if (ubi->beb_rsvd_level < 0) {
+ ubi->beb_rsvd_level = 0;
+ ubi_warn("number of bad PEBs (%d) is above the expected limit (%d), not reserving any PEBs for bad PEB handling, will use available PEBs (if any)",
+ ubi->bad_peb_count, ubi->bad_peb_limit);
+ }
}
/**
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index 84f66e3..383ee43 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -51,17 +51,14 @@
#define UBI_NAME_STR "ubi"
/* Normal UBI messages */
-#define ubi_msg(fmt, ...) printk(KERN_NOTICE "UBI: " fmt "\n", ##__VA_ARGS__)
+#define ubi_msg(fmt, ...) pr_notice("UBI: " fmt "\n", ##__VA_ARGS__)
/* UBI warning messages */
-#define ubi_warn(fmt, ...) printk(KERN_WARNING "UBI warning: %s: " fmt "\n", \
- __func__, ##__VA_ARGS__)
+#define ubi_warn(fmt, ...) pr_warn("UBI warning: %s: " fmt "\n", \
+ __func__, ##__VA_ARGS__)
/* UBI error messages */
-#define ubi_err(fmt, ...) printk(KERN_ERR "UBI error: %s: " fmt "\n", \
+#define ubi_err(fmt, ...) pr_err("UBI error: %s: " fmt "\n", \
__func__, ##__VA_ARGS__)
-/* Lowest number PEBs reserved for bad PEB handling */
-#define MIN_RESEVED_PEBS 2
-
/* Background thread name pattern */
#define UBI_BGT_NAME_PATTERN "ubi_bgt%dd"
@@ -363,6 +360,7 @@
* @flash_size: underlying MTD device size (in bytes)
* @peb_count: count of physical eraseblocks on the MTD device
* @peb_size: physical eraseblock size
+ * @bad_peb_limit: top limit of expected bad physical eraseblocks
* @bad_peb_count: count of bad physical eraseblocks
* @good_peb_count: count of good physical eraseblocks
* @corr_peb_count: count of corrupted physical eraseblocks (preserved and not
@@ -410,6 +408,7 @@
int avail_pebs;
int beb_rsvd_pebs;
int beb_rsvd_level;
+ int bad_peb_limit;
int autoresize_vol_id;
int vtbl_slots;
@@ -694,7 +693,8 @@
struct ubi_vid_hdr *vid_hdr);
/* build.c */
-int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset);
+int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
+ int vid_hdr_offset, int max_beb_per1024);
int ubi_detach_mtd_dev(int ubi_num, int anyway);
struct ubi_device *ubi_get_device(int ubi_num);
void ubi_put_device(struct ubi_device *ubi);
diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
index 568307c..926e3df 100644
--- a/drivers/mtd/ubi/vtbl.c
+++ b/drivers/mtd/ubi/vtbl.c
@@ -270,8 +270,8 @@
if (len1 > 0 && len1 == len2 &&
!strncmp(vtbl[i].name, vtbl[n].name, len1)) {
- ubi_err("volumes %d and %d have the same name"
- " \"%s\"", i, n, vtbl[i].name);
+ ubi_err("volumes %d and %d have the same name \"%s\"",
+ i, n, vtbl[i].name);
ubi_dump_vtbl_record(&vtbl[i], i);
ubi_dump_vtbl_record(&vtbl[n], n);
return -EINVAL;
@@ -304,7 +304,7 @@
struct ubi_vid_hdr *vid_hdr;
struct ubi_ainf_peb *new_aeb;
- ubi_msg("create volume table (copy #%d)", copy + 1);
+ dbg_gen("create volume table (copy #%d)", copy + 1);
vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL);
if (!vid_hdr)
@@ -562,8 +562,8 @@
if (vtbl[i].flags & UBI_VTBL_AUTORESIZE_FLG) {
/* Auto re-size flag may be set only for one volume */
if (ubi->autoresize_vol_id != -1) {
- ubi_err("more than one auto-resize volume (%d "
- "and %d)", ubi->autoresize_vol_id, i);
+ ubi_err("more than one auto-resize volume (%d and %d)",
+ ubi->autoresize_vol_id, i);
kfree(vol);
return -EINVAL;
}
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index b6be644..032fc57 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -978,9 +978,10 @@
int cancel)
{
struct ubi_wl_entry *e = wl_wrk->e;
- int pnum = e->pnum, err, need;
+ int pnum = e->pnum;
int vol_id = wl_wrk->vol_id;
int lnum = wl_wrk->lnum;
+ int err, available_consumed = 0;
if (cancel) {
dbg_wl("cancel erasure of PEB %d EC %d", pnum, e->ec);
@@ -1045,20 +1046,14 @@
}
spin_lock(&ubi->volumes_lock);
- need = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs + 1;
- if (need > 0) {
- need = ubi->avail_pebs >= need ? need : ubi->avail_pebs;
- ubi->avail_pebs -= need;
- ubi->rsvd_pebs += need;
- ubi->beb_rsvd_pebs += need;
- if (need > 0)
- ubi_msg("reserve more %d PEBs", need);
- }
-
if (ubi->beb_rsvd_pebs == 0) {
- spin_unlock(&ubi->volumes_lock);
- ubi_err("no reserved physical eraseblocks");
- goto out_ro;
+ if (ubi->avail_pebs == 0) {
+ spin_unlock(&ubi->volumes_lock);
+ ubi_err("no reserved/available physical eraseblocks");
+ goto out_ro;
+ }
+ ubi->avail_pebs -= 1;
+ available_consumed = 1;
}
spin_unlock(&ubi->volumes_lock);
@@ -1068,19 +1063,36 @@
goto out_ro;
spin_lock(&ubi->volumes_lock);
- ubi->beb_rsvd_pebs -= 1;
+ if (ubi->beb_rsvd_pebs > 0) {
+ if (available_consumed) {
+ /*
+ * The amount of reserved PEBs increased since we last
+ * checked.
+ */
+ ubi->avail_pebs += 1;
+ available_consumed = 0;
+ }
+ ubi->beb_rsvd_pebs -= 1;
+ }
ubi->bad_peb_count += 1;
ubi->good_peb_count -= 1;
ubi_calculate_reserved(ubi);
- if (ubi->beb_rsvd_pebs)
+ if (available_consumed)
+ ubi_warn("no PEBs in the reserved pool, used an available PEB");
+ else if (ubi->beb_rsvd_pebs)
ubi_msg("%d PEBs left in the reserve", ubi->beb_rsvd_pebs);
else
- ubi_warn("last PEB from the reserved pool was used");
+ ubi_warn("last PEB from the reserve was used");
spin_unlock(&ubi->volumes_lock);
return err;
out_ro:
+ if (available_consumed) {
+ spin_lock(&ubi->volumes_lock);
+ ubi->avail_pebs += 1;
+ spin_unlock(&ubi->volumes_lock);
+ }
ubi_ro_mode(ubi);
return err;
}
@@ -1189,7 +1201,7 @@
{
struct ubi_wl_entry *e;
- dbg_msg("schedule PEB %d for scrubbing", pnum);
+ ubi_msg("schedule PEB %d for scrubbing", pnum);
retry:
spin_lock(&ubi->wl_lock);
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
index 2475228..1f8d24b 100644
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -79,9 +79,10 @@
extern int register_mtd_parser(struct mtd_part_parser *parser);
extern int deregister_mtd_parser(struct mtd_part_parser *parser);
-int mtd_is_partition(struct mtd_info *mtd);
+int mtd_is_partition(const struct mtd_info *mtd);
int mtd_add_partition(struct mtd_info *master, char *name,
long long offset, long long length);
int mtd_del_partition(struct mtd_info *master, int partno);
+uint64_t mtd_get_device_size(const struct mtd_info *mtd);
#endif
diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h
index 8787349..53cae1e 100644
--- a/include/mtd/ubi-user.h
+++ b/include/mtd/ubi-user.h
@@ -222,6 +222,7 @@
* @ubi_num: UBI device number to create
* @mtd_num: MTD device number to attach
* @vid_hdr_offset: VID header offset (use defaults if %0)
+ * @max_beb_per1024: maximum expected number of bad PEB per 1024 PEBs
* @padding: reserved for future, not used, has to be zeroed
*
* This data structure is used to specify MTD device UBI has to attach and the
@@ -245,12 +246,25 @@
* be 2KiB-64 bytes = 1984. Note, that this position is not even 512-bytes
* aligned, which is OK, as UBI is clever enough to realize this is 4th
* sub-page of the first page and add needed padding.
+ *
+ * The @max_beb_per1024 is the maximum amount of bad PEBs UBI expects on the
+ * UBI device per 1024 eraseblocks. This value is often given in an other form
+ * in the NAND datasheet (min NVB i.e. minimal number of valid blocks). The
+ * maximum expected bad eraseblocks per 1024 is then:
+ * 1024 * (1 - MinNVB / MaxNVB)
+ * Which gives 20 for most NAND devices. This limit is used in order to derive
+ * amount of eraseblock UBI reserves for handling new bad blocks. If the device
+ * has more bad eraseblocks than this limit, UBI does not reserve any physical
+ * eraseblocks for new bad eraseblocks, but attempts to use available
+ * eraseblocks (if any). The accepted range is 0-768. If 0 is given, the
+ * default kernel value of %CONFIG_MTD_UBI_BEB_LIMIT will be used.
*/
struct ubi_attach_req {
__s32 ubi_num;
__s32 mtd_num;
__s32 vid_hdr_offset;
- __s8 padding[12];
+ __s16 max_beb_per1024;
+ __s8 padding[10];
};
/**