* LEB 1. This scheme guarantees recoverability from unclean reboots.
*
* In this UBI implementation the on-flash volume table does not contain any
- * information about how many data static volumes contain. This information may
- * be found from the scanning data.
+ * information about how much data static volumes contain.
*
* But it would still be beneficial to store this information in the volume
* table. For example, suppose we have a static volume X, and all its physical
* eraseblocks became bad for some reasons. Suppose we are attaching the
- * corresponding MTD device, the scanning has found no logical eraseblocks
+ * corresponding MTD device, for some reason we find no logical eraseblocks
* corresponding to the volume X. According to the volume table volume X does
* exist. So we don't know whether it is just empty or all its physical
- * eraseblocks went bad. So we cannot alarm the user about this corruption.
+ * eraseblocks went bad. So we cannot alarm the user properly.
*
* The volume table also stores so-called "update marker", which is used for
* volume updates. Before updating the volume, the update marker is set, and
#include <asm/div64.h>
#include "ubi.h"
-static void paranoid_vtbl_check(const struct ubi_device *ubi);
+static void self_vtbl_check(const struct ubi_device *ubi);
/* Empty volume table record */
static struct ubi_vtbl_record empty_vtbl_record;
return err;
}
- paranoid_vtbl_check(ubi);
+ self_vtbl_check(ubi);
return 0;
}
n = ubi->leb_size % alignment;
if (data_pad != n) {
- dbg_err("bad data_pad, has to be %d", n);
+ ubi_err("bad data_pad, has to be %d", n);
err = 6;
goto bad;
}
}
if (reserved_pebs > ubi->good_peb_count) {
- dbg_err("too large reserved_pebs %d, good PEBs %d",
+ ubi_err("too large reserved_pebs %d, good PEBs %d",
reserved_pebs, ubi->good_peb_count);
err = 9;
goto bad;
/**
* create_vtbl - create a copy of volume table.
* @ubi: UBI device description object
- * @si: scanning information
+ * @ai: attaching information
* @copy: number of the volume table copy
* @vtbl: contents of the volume table
*
* This function returns zero in case of success and a negative error code in
* case of failure.
*/
-static int create_vtbl(struct ubi_device *ubi, struct ubi_scan_info *si,
+static int create_vtbl(struct ubi_device *ubi, struct ubi_attach_info *ai,
int copy, void *vtbl)
{
int err, tries = 0;
struct ubi_vid_hdr *vid_hdr;
- struct ubi_scan_leb *new_seb;
+ struct ubi_ainf_peb *new_aeb;
ubi_msg("create volume table (copy #%d)", copy + 1);
return -ENOMEM;
retry:
- new_seb = ubi_scan_get_free_peb(ubi, si);
- if (IS_ERR(new_seb)) {
- err = PTR_ERR(new_seb);
+ new_aeb = ubi_early_get_peb(ubi, ai);
+ if (IS_ERR(new_aeb)) {
+ err = PTR_ERR(new_aeb);
goto out_free;
}
vid_hdr->data_size = vid_hdr->used_ebs =
vid_hdr->data_pad = cpu_to_be32(0);
vid_hdr->lnum = cpu_to_be32(copy);
- vid_hdr->sqnum = cpu_to_be64(++si->max_sqnum);
+ vid_hdr->sqnum = cpu_to_be64(++ai->max_sqnum);
/* The EC header is already there, write the VID header */
- err = ubi_io_write_vid_hdr(ubi, new_seb->pnum, vid_hdr);
+ err = ubi_io_write_vid_hdr(ubi, new_aeb->pnum, vid_hdr);
if (err)
goto write_error;
/* Write the layout volume contents */
- err = ubi_io_write_data(ubi, vtbl, new_seb->pnum, 0, ubi->vtbl_size);
+ err = ubi_io_write_data(ubi, vtbl, new_aeb->pnum, 0, ubi->vtbl_size);
if (err)
goto write_error;
/*
- * And add it to the scanning information. Don't delete the old version
- * of this LEB as it will be deleted and freed in 'ubi_scan_add_used()'.
+ * And add it to the attaching information. Don't delete the old version
+ * of this LEB as it will be deleted and freed in 'ubi_add_to_av()'.
*/
- err = ubi_scan_add_used(ubi, si, new_seb->pnum, new_seb->ec,
- vid_hdr, 0);
- kfree(new_seb);
+ err = ubi_add_to_av(ubi, ai, new_aeb->pnum, new_aeb->ec, vid_hdr, 0);
+ kmem_cache_free(ai->aeb_slab_cache, new_aeb);
ubi_free_vid_hdr(ubi, vid_hdr);
return err;
* Probably this physical eraseblock went bad, try to pick
* another one.
*/
- list_add(&new_seb->u.list, &si->erase);
+ list_add(&new_aeb->u.list, &ai->erase);
goto retry;
}
- kfree(new_seb);
+ kmem_cache_free(ai->aeb_slab_cache, new_aeb);
out_free:
ubi_free_vid_hdr(ubi, vid_hdr);
return err;
/**
* process_lvol - process the layout volume.
* @ubi: UBI device description object
- * @si: scanning information
- * @sv: layout volume scanning information
+ * @ai: attaching information
+ * @av: layout volume attaching information
*
* This function is responsible for reading the layout volume, ensuring it is
* not corrupted, and recovering from corruptions if needed. Returns volume
* table in case of success and a negative error code in case of failure.
*/
static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi,
- struct ubi_scan_info *si,
- struct ubi_scan_volume *sv)
+ struct ubi_attach_info *ai,
+ struct ubi_ainf_volume *av)
{
int err;
struct rb_node *rb;
- struct ubi_scan_leb *seb;
+ struct ubi_ainf_peb *aeb;
struct ubi_vtbl_record *leb[UBI_LAYOUT_VOLUME_EBS] = { NULL, NULL };
int leb_corrupted[UBI_LAYOUT_VOLUME_EBS] = {1, 1};
dbg_gen("check layout volume");
/* Read both LEB 0 and LEB 1 into memory */
- ubi_rb_for_each_entry(rb, seb, &sv->root, u.rb) {
- leb[seb->lnum] = vzalloc(ubi->vtbl_size);
- if (!leb[seb->lnum]) {
+ ubi_rb_for_each_entry(rb, aeb, &av->root, u.rb) {
+ leb[aeb->lnum] = vzalloc(ubi->vtbl_size);
+ if (!leb[aeb->lnum]) {
err = -ENOMEM;
goto out_free;
}
- err = ubi_io_read_data(ubi, leb[seb->lnum], seb->pnum, 0,
+ err = ubi_io_read_data(ubi, leb[aeb->lnum], aeb->pnum, 0,
ubi->vtbl_size);
if (err == UBI_IO_BITFLIPS || mtd_is_eccerr(err))
/*
* uncorrectable ECC error, but we have our own CRC and
* the data will be checked later. If the data is OK,
* the PEB will be scrubbed (because we set
- * seb->scrub). If the data is not OK, the contents of
+ * aeb->scrub). If the data is not OK, the contents of
* the PEB will be recovered from the second copy, and
- * seb->scrub will be cleared in
- * 'ubi_scan_add_used()'.
+ * aeb->scrub will be cleared in
+ * 'ubi_add_to_av()'.
*/
- seb->scrub = 1;
+ aeb->scrub = 1;
else if (err)
goto out_free;
}
ubi->vtbl_size);
if (leb_corrupted[1]) {
ubi_warn("volume table copy #2 is corrupted");
- err = create_vtbl(ubi, si, 1, leb[0]);
+ err = create_vtbl(ubi, ai, 1, leb[0]);
if (err)
goto out_free;
ubi_msg("volume table was restored");
}
ubi_warn("volume table copy #1 is corrupted");
- err = create_vtbl(ubi, si, 0, leb[1]);
+ err = create_vtbl(ubi, ai, 0, leb[1]);
if (err)
goto out_free;
ubi_msg("volume table was restored");
/**
* create_empty_lvol - create empty layout volume.
* @ubi: UBI device description object
- * @si: scanning information
+ * @ai: attaching information
*
* This function returns volume table contents in case of success and a
* negative error code in case of failure.
*/
static struct ubi_vtbl_record *create_empty_lvol(struct ubi_device *ubi,
- struct ubi_scan_info *si)
+ struct ubi_attach_info *ai)
{
int i;
struct ubi_vtbl_record *vtbl;
for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
int err;
- err = create_vtbl(ubi, si, i, vtbl);
+ err = create_vtbl(ubi, ai, i, vtbl);
if (err) {
vfree(vtbl);
return ERR_PTR(err);
/**
* init_volumes - initialize volume information for existing volumes.
* @ubi: UBI device description object
- * @si: scanning information
+ * @ai: scanning information
* @vtbl: volume table
*
* This function allocates volume description objects for existing volumes.
* Returns zero in case of success and a negative error code in case of
* failure.
*/
-static int init_volumes(struct ubi_device *ubi, const struct ubi_scan_info *si,
+static int init_volumes(struct ubi_device *ubi,
+ const struct ubi_attach_info *ai,
const struct ubi_vtbl_record *vtbl)
{
int i, reserved_pebs = 0;
- struct ubi_scan_volume *sv;
+ struct ubi_ainf_volume *av;
struct ubi_volume *vol;
for (i = 0; i < ubi->vtbl_slots; i++) {
}
/* Static volumes only */
- sv = ubi_scan_find_sv(si, i);
- if (!sv) {
+ av = ubi_find_av(ai, i);
+ if (!av) {
/*
* No eraseblocks belonging to this volume found. We
* don't actually know whether this static volume is
continue;
}
- if (sv->leb_count != sv->used_ebs) {
+ if (av->leb_count != av->used_ebs) {
/*
* We found a static volume which misses several
* eraseblocks. Treat it as corrupted.
*/
ubi_warn("static volume %d misses %d LEBs - corrupted",
- sv->vol_id, sv->used_ebs - sv->leb_count);
+ av->vol_id, av->used_ebs - av->leb_count);
vol->corrupted = 1;
continue;
}
- vol->used_ebs = sv->used_ebs;
+ vol->used_ebs = av->used_ebs;
vol->used_bytes =
(long long)(vol->used_ebs - 1) * vol->usable_leb_size;
- vol->used_bytes += sv->last_data_size;
- vol->last_eb_bytes = sv->last_data_size;
+ vol->used_bytes += av->last_data_size;
+ vol->last_eb_bytes = av->last_data_size;
}
/* And add the layout volume */
}
/**
- * check_sv - check volume scanning information.
+ * check_av - check volume attaching information.
* @vol: UBI volume description object
- * @sv: volume scanning information
+ * @av: volume attaching information
*
- * This function returns zero if the volume scanning information is consistent
+ * This function returns zero if the volume attaching information is consistent
* to the data read from the volume tabla, and %-EINVAL if not.
*/
-static int check_sv(const struct ubi_volume *vol,
- const struct ubi_scan_volume *sv)
+static int check_av(const struct ubi_volume *vol,
+ const struct ubi_ainf_volume *av)
{
int err;
- if (sv->highest_lnum >= vol->reserved_pebs) {
+ if (av->highest_lnum >= vol->reserved_pebs) {
err = 1;
goto bad;
}
- if (sv->leb_count > vol->reserved_pebs) {
+ if (av->leb_count > vol->reserved_pebs) {
err = 2;
goto bad;
}
- if (sv->vol_type != vol->vol_type) {
+ if (av->vol_type != vol->vol_type) {
err = 3;
goto bad;
}
- if (sv->used_ebs > vol->reserved_pebs) {
+ if (av->used_ebs > vol->reserved_pebs) {
err = 4;
goto bad;
}
- if (sv->data_pad != vol->data_pad) {
+ if (av->data_pad != vol->data_pad) {
err = 5;
goto bad;
}
return 0;
bad:
- ubi_err("bad scanning information, error %d", err);
- ubi_dump_sv(sv);
+ ubi_err("bad attaching information, error %d", err);
+ ubi_dump_av(av);
ubi_dump_vol_info(vol);
return -EINVAL;
}
/**
- * check_scanning_info - check that scanning information.
+ * check_attaching_info - check that attaching information.
* @ubi: UBI device description object
- * @si: scanning information
+ * @ai: attaching information
*
* Even though we protect on-flash data by CRC checksums, we still don't trust
- * the media. This function ensures that scanning information is consistent to
- * the information read from the volume table. Returns zero if the scanning
+ * the media. This function ensures that attaching information is consistent to
+ * the information read from the volume table. Returns zero if the attaching
* information is OK and %-EINVAL if it is not.
*/
-static int check_scanning_info(const struct ubi_device *ubi,
- struct ubi_scan_info *si)
+static int check_attaching_info(const struct ubi_device *ubi,
+ struct ubi_attach_info *ai)
{
int err, i;
- struct ubi_scan_volume *sv;
+ struct ubi_ainf_volume *av;
struct ubi_volume *vol;
- if (si->vols_found > UBI_INT_VOL_COUNT + ubi->vtbl_slots) {
- ubi_err("scanning found %d volumes, maximum is %d + %d",
- si->vols_found, UBI_INT_VOL_COUNT, ubi->vtbl_slots);
+ if (ai->vols_found > UBI_INT_VOL_COUNT + ubi->vtbl_slots) {
+ ubi_err("found %d volumes while attaching, maximum is %d + %d",
+ ai->vols_found, UBI_INT_VOL_COUNT, ubi->vtbl_slots);
return -EINVAL;
}
- if (si->highest_vol_id >= ubi->vtbl_slots + UBI_INT_VOL_COUNT &&
- si->highest_vol_id < UBI_INTERNAL_VOL_START) {
- ubi_err("too large volume ID %d found by scanning",
- si->highest_vol_id);
+ if (ai->highest_vol_id >= ubi->vtbl_slots + UBI_INT_VOL_COUNT &&
+ ai->highest_vol_id < UBI_INTERNAL_VOL_START) {
+ ubi_err("too large volume ID %d found", ai->highest_vol_id);
return -EINVAL;
}
for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
cond_resched();
- sv = ubi_scan_find_sv(si, i);
+ av = ubi_find_av(ai, i);
vol = ubi->volumes[i];
if (!vol) {
- if (sv)
- ubi_scan_rm_volume(si, sv);
+ if (av)
+ ubi_remove_av(ai, av);
continue;
}
if (vol->reserved_pebs == 0) {
ubi_assert(i < ubi->vtbl_slots);
- if (!sv)
+ if (!av)
continue;
/*
- * During scanning we found a volume which does not
+ * During attaching we found a volume which does not
* exist according to the information in the volume
* table. This must have happened due to an unclean
* reboot while the volume was being removed. Discard
* these eraseblocks.
*/
- ubi_msg("finish volume %d removal", sv->vol_id);
- ubi_scan_rm_volume(si, sv);
- } else if (sv) {
- err = check_sv(vol, sv);
+ ubi_msg("finish volume %d removal", av->vol_id);
+ ubi_remove_av(ai, av);
+ } else if (av) {
+ err = check_av(vol, av);
if (err)
return err;
}
/**
* ubi_read_volume_table - read the volume table.
* @ubi: UBI device description object
- * @si: scanning information
+ * @ai: attaching information
*
* This function reads volume table, checks it, recover from errors if needed,
* or creates it if needed. Returns zero in case of success and a negative
* error code in case of failure.
*/
-int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_scan_info *si)
+int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_attach_info *ai)
{
int i, err;
- struct ubi_scan_volume *sv;
+ struct ubi_ainf_volume *av;
empty_vtbl_record.crc = cpu_to_be32(0xf116c36b);
ubi->vtbl_size = ubi->vtbl_slots * UBI_VTBL_RECORD_SIZE;
ubi->vtbl_size = ALIGN(ubi->vtbl_size, ubi->min_io_size);
- sv = ubi_scan_find_sv(si, UBI_LAYOUT_VOLUME_ID);
- if (!sv) {
+ av = ubi_find_av(ai, UBI_LAYOUT_VOLUME_ID);
+ if (!av) {
/*
* No logical eraseblocks belonging to the layout volume were
* found. This could mean that the flash is just empty. In
* But if flash is not empty this must be a corruption or the
* MTD device just contains garbage.
*/
- if (si->is_empty) {
- ubi->vtbl = create_empty_lvol(ubi, si);
+ if (ai->is_empty) {
+ ubi->vtbl = create_empty_lvol(ubi, ai);
if (IS_ERR(ubi->vtbl))
return PTR_ERR(ubi->vtbl);
} else {
return -EINVAL;
}
} else {
- if (sv->leb_count > UBI_LAYOUT_VOLUME_EBS) {
+ if (av->leb_count > UBI_LAYOUT_VOLUME_EBS) {
/* This must not happen with proper UBI images */
- dbg_err("too many LEBs (%d) in layout volume",
- sv->leb_count);
+ ubi_err("too many LEBs (%d) in layout volume",
+ av->leb_count);
return -EINVAL;
}
- ubi->vtbl = process_lvol(ubi, si, sv);
+ ubi->vtbl = process_lvol(ubi, ai, av);
if (IS_ERR(ubi->vtbl))
return PTR_ERR(ubi->vtbl);
}
* The layout volume is OK, initialize the corresponding in-RAM data
* structures.
*/
- err = init_volumes(ubi, si, ubi->vtbl);
+ err = init_volumes(ubi, ai, ubi->vtbl);
if (err)
goto out_free;
/*
- * Make sure that the scanning information is consistent to the
+ * Make sure that the attaching information is consistent to the
* information stored in the volume table.
*/
- err = check_scanning_info(ubi, si);
+ err = check_attaching_info(ubi, ai);
if (err)
goto out_free;
}
/**
- * paranoid_vtbl_check - check volume table.
+ * self_vtbl_check - check volume table.
* @ubi: UBI device description object
*/
-static void paranoid_vtbl_check(const struct ubi_device *ubi)
+static void self_vtbl_check(const struct ubi_device *ubi)
{
if (!ubi->dbg->chk_gen)
return;
if (vtbl_check(ubi, ubi->vtbl)) {
- ubi_err("paranoid check failed");
+ ubi_err("self-check failed");
BUG();
}
}
git.openpandora.org / pandora-kernel.git / blobdiff