mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
3046 lines
82 KiB
3046 lines
82 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* This file is part of UBIFS. |
|
* |
|
* Copyright (C) 2006-2008 Nokia Corporation |
|
* |
|
* Authors: Artem Bityutskiy (Битюцкий Артём) |
|
* Adrian Hunter |
|
*/ |
|
|
|
/* |
|
* This file implements most of the debugging stuff which is compiled in only |
|
* when it is enabled. But some debugging check functions are implemented in |
|
* corresponding subsystem, just because they are closely related and utilize |
|
* various local functions of those subsystems. |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/debugfs.h> |
|
#include <linux/math64.h> |
|
#include <linux/uaccess.h> |
|
#include <linux/random.h> |
|
#include <linux/ctype.h> |
|
#include "ubifs.h" |
|
|
|
static DEFINE_SPINLOCK(dbg_lock); |
|
|
|
static const char *get_key_fmt(int fmt) |
|
{ |
|
switch (fmt) { |
|
case UBIFS_SIMPLE_KEY_FMT: |
|
return "simple"; |
|
default: |
|
return "unknown/invalid format"; |
|
} |
|
} |
|
|
|
static const char *get_key_hash(int hash) |
|
{ |
|
switch (hash) { |
|
case UBIFS_KEY_HASH_R5: |
|
return "R5"; |
|
case UBIFS_KEY_HASH_TEST: |
|
return "test"; |
|
default: |
|
return "unknown/invalid name hash"; |
|
} |
|
} |
|
|
|
static const char *get_key_type(int type) |
|
{ |
|
switch (type) { |
|
case UBIFS_INO_KEY: |
|
return "inode"; |
|
case UBIFS_DENT_KEY: |
|
return "direntry"; |
|
case UBIFS_XENT_KEY: |
|
return "xentry"; |
|
case UBIFS_DATA_KEY: |
|
return "data"; |
|
case UBIFS_TRUN_KEY: |
|
return "truncate"; |
|
default: |
|
return "unknown/invalid key"; |
|
} |
|
} |
|
|
|
static const char *get_dent_type(int type) |
|
{ |
|
switch (type) { |
|
case UBIFS_ITYPE_REG: |
|
return "file"; |
|
case UBIFS_ITYPE_DIR: |
|
return "dir"; |
|
case UBIFS_ITYPE_LNK: |
|
return "symlink"; |
|
case UBIFS_ITYPE_BLK: |
|
return "blkdev"; |
|
case UBIFS_ITYPE_CHR: |
|
return "char dev"; |
|
case UBIFS_ITYPE_FIFO: |
|
return "fifo"; |
|
case UBIFS_ITYPE_SOCK: |
|
return "socket"; |
|
default: |
|
return "unknown/invalid type"; |
|
} |
|
} |
|
|
|
const char *dbg_snprintf_key(const struct ubifs_info *c, |
|
const union ubifs_key *key, char *buffer, int len) |
|
{ |
|
char *p = buffer; |
|
int type = key_type(c, key); |
|
|
|
if (c->key_fmt == UBIFS_SIMPLE_KEY_FMT) { |
|
switch (type) { |
|
case UBIFS_INO_KEY: |
|
len -= snprintf(p, len, "(%lu, %s)", |
|
(unsigned long)key_inum(c, key), |
|
get_key_type(type)); |
|
break; |
|
case UBIFS_DENT_KEY: |
|
case UBIFS_XENT_KEY: |
|
len -= snprintf(p, len, "(%lu, %s, %#08x)", |
|
(unsigned long)key_inum(c, key), |
|
get_key_type(type), key_hash(c, key)); |
|
break; |
|
case UBIFS_DATA_KEY: |
|
len -= snprintf(p, len, "(%lu, %s, %u)", |
|
(unsigned long)key_inum(c, key), |
|
get_key_type(type), key_block(c, key)); |
|
break; |
|
case UBIFS_TRUN_KEY: |
|
len -= snprintf(p, len, "(%lu, %s)", |
|
(unsigned long)key_inum(c, key), |
|
get_key_type(type)); |
|
break; |
|
default: |
|
len -= snprintf(p, len, "(bad key type: %#08x, %#08x)", |
|
key->u32[0], key->u32[1]); |
|
} |
|
} else |
|
len -= snprintf(p, len, "bad key format %d", c->key_fmt); |
|
ubifs_assert(c, len > 0); |
|
return p; |
|
} |
|
|
|
const char *dbg_ntype(int type) |
|
{ |
|
switch (type) { |
|
case UBIFS_PAD_NODE: |
|
return "padding node"; |
|
case UBIFS_SB_NODE: |
|
return "superblock node"; |
|
case UBIFS_MST_NODE: |
|
return "master node"; |
|
case UBIFS_REF_NODE: |
|
return "reference node"; |
|
case UBIFS_INO_NODE: |
|
return "inode node"; |
|
case UBIFS_DENT_NODE: |
|
return "direntry node"; |
|
case UBIFS_XENT_NODE: |
|
return "xentry node"; |
|
case UBIFS_DATA_NODE: |
|
return "data node"; |
|
case UBIFS_TRUN_NODE: |
|
return "truncate node"; |
|
case UBIFS_IDX_NODE: |
|
return "indexing node"; |
|
case UBIFS_CS_NODE: |
|
return "commit start node"; |
|
case UBIFS_ORPH_NODE: |
|
return "orphan node"; |
|
case UBIFS_AUTH_NODE: |
|
return "auth node"; |
|
default: |
|
return "unknown node"; |
|
} |
|
} |
|
|
|
static const char *dbg_gtype(int type) |
|
{ |
|
switch (type) { |
|
case UBIFS_NO_NODE_GROUP: |
|
return "no node group"; |
|
case UBIFS_IN_NODE_GROUP: |
|
return "in node group"; |
|
case UBIFS_LAST_OF_NODE_GROUP: |
|
return "last of node group"; |
|
default: |
|
return "unknown"; |
|
} |
|
} |
|
|
|
const char *dbg_cstate(int cmt_state) |
|
{ |
|
switch (cmt_state) { |
|
case COMMIT_RESTING: |
|
return "commit resting"; |
|
case COMMIT_BACKGROUND: |
|
return "background commit requested"; |
|
case COMMIT_REQUIRED: |
|
return "commit required"; |
|
case COMMIT_RUNNING_BACKGROUND: |
|
return "BACKGROUND commit running"; |
|
case COMMIT_RUNNING_REQUIRED: |
|
return "commit running and required"; |
|
case COMMIT_BROKEN: |
|
return "broken commit"; |
|
default: |
|
return "unknown commit state"; |
|
} |
|
} |
|
|
|
const char *dbg_jhead(int jhead) |
|
{ |
|
switch (jhead) { |
|
case GCHD: |
|
return "0 (GC)"; |
|
case BASEHD: |
|
return "1 (base)"; |
|
case DATAHD: |
|
return "2 (data)"; |
|
default: |
|
return "unknown journal head"; |
|
} |
|
} |
|
|
|
static void dump_ch(const struct ubifs_ch *ch) |
|
{ |
|
pr_err("\tmagic %#x\n", le32_to_cpu(ch->magic)); |
|
pr_err("\tcrc %#x\n", le32_to_cpu(ch->crc)); |
|
pr_err("\tnode_type %d (%s)\n", ch->node_type, |
|
dbg_ntype(ch->node_type)); |
|
pr_err("\tgroup_type %d (%s)\n", ch->group_type, |
|
dbg_gtype(ch->group_type)); |
|
pr_err("\tsqnum %llu\n", |
|
(unsigned long long)le64_to_cpu(ch->sqnum)); |
|
pr_err("\tlen %u\n", le32_to_cpu(ch->len)); |
|
} |
|
|
|
void ubifs_dump_inode(struct ubifs_info *c, const struct inode *inode) |
|
{ |
|
const struct ubifs_inode *ui = ubifs_inode(inode); |
|
struct fscrypt_name nm = {0}; |
|
union ubifs_key key; |
|
struct ubifs_dent_node *dent, *pdent = NULL; |
|
int count = 2; |
|
|
|
pr_err("Dump in-memory inode:"); |
|
pr_err("\tinode %lu\n", inode->i_ino); |
|
pr_err("\tsize %llu\n", |
|
(unsigned long long)i_size_read(inode)); |
|
pr_err("\tnlink %u\n", inode->i_nlink); |
|
pr_err("\tuid %u\n", (unsigned int)i_uid_read(inode)); |
|
pr_err("\tgid %u\n", (unsigned int)i_gid_read(inode)); |
|
pr_err("\tatime %u.%u\n", |
|
(unsigned int)inode->i_atime.tv_sec, |
|
(unsigned int)inode->i_atime.tv_nsec); |
|
pr_err("\tmtime %u.%u\n", |
|
(unsigned int)inode->i_mtime.tv_sec, |
|
(unsigned int)inode->i_mtime.tv_nsec); |
|
pr_err("\tctime %u.%u\n", |
|
(unsigned int)inode->i_ctime.tv_sec, |
|
(unsigned int)inode->i_ctime.tv_nsec); |
|
pr_err("\tcreat_sqnum %llu\n", ui->creat_sqnum); |
|
pr_err("\txattr_size %u\n", ui->xattr_size); |
|
pr_err("\txattr_cnt %u\n", ui->xattr_cnt); |
|
pr_err("\txattr_names %u\n", ui->xattr_names); |
|
pr_err("\tdirty %u\n", ui->dirty); |
|
pr_err("\txattr %u\n", ui->xattr); |
|
pr_err("\tbulk_read %u\n", ui->bulk_read); |
|
pr_err("\tsynced_i_size %llu\n", |
|
(unsigned long long)ui->synced_i_size); |
|
pr_err("\tui_size %llu\n", |
|
(unsigned long long)ui->ui_size); |
|
pr_err("\tflags %d\n", ui->flags); |
|
pr_err("\tcompr_type %d\n", ui->compr_type); |
|
pr_err("\tlast_page_read %lu\n", ui->last_page_read); |
|
pr_err("\tread_in_a_row %lu\n", ui->read_in_a_row); |
|
pr_err("\tdata_len %d\n", ui->data_len); |
|
|
|
if (!S_ISDIR(inode->i_mode)) |
|
return; |
|
|
|
pr_err("List of directory entries:\n"); |
|
ubifs_assert(c, !mutex_is_locked(&c->tnc_mutex)); |
|
|
|
lowest_dent_key(c, &key, inode->i_ino); |
|
while (1) { |
|
dent = ubifs_tnc_next_ent(c, &key, &nm); |
|
if (IS_ERR(dent)) { |
|
if (PTR_ERR(dent) != -ENOENT) |
|
pr_err("error %ld\n", PTR_ERR(dent)); |
|
break; |
|
} |
|
|
|
pr_err("\t%d: inode %llu, type %s, len %d\n", |
|
count++, (unsigned long long) le64_to_cpu(dent->inum), |
|
get_dent_type(dent->type), |
|
le16_to_cpu(dent->nlen)); |
|
|
|
fname_name(&nm) = dent->name; |
|
fname_len(&nm) = le16_to_cpu(dent->nlen); |
|
kfree(pdent); |
|
pdent = dent; |
|
key_read(c, &dent->key, &key); |
|
} |
|
kfree(pdent); |
|
} |
|
|
|
void ubifs_dump_node(const struct ubifs_info *c, const void *node, int node_len) |
|
{ |
|
int i, n, type, safe_len, max_node_len, min_node_len; |
|
union ubifs_key key; |
|
const struct ubifs_ch *ch = node; |
|
char key_buf[DBG_KEY_BUF_LEN]; |
|
|
|
/* If the magic is incorrect, just hexdump the first bytes */ |
|
if (le32_to_cpu(ch->magic) != UBIFS_NODE_MAGIC) { |
|
pr_err("Not a node, first %zu bytes:", UBIFS_CH_SZ); |
|
print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 32, 1, |
|
(void *)node, UBIFS_CH_SZ, 1); |
|
return; |
|
} |
|
|
|
/* Skip dumping unknown type node */ |
|
type = ch->node_type; |
|
if (type < 0 || type >= UBIFS_NODE_TYPES_CNT) { |
|
pr_err("node type %d was not recognized\n", type); |
|
return; |
|
} |
|
|
|
spin_lock(&dbg_lock); |
|
dump_ch(node); |
|
|
|
if (c->ranges[type].max_len == 0) { |
|
max_node_len = min_node_len = c->ranges[type].len; |
|
} else { |
|
max_node_len = c->ranges[type].max_len; |
|
min_node_len = c->ranges[type].min_len; |
|
} |
|
safe_len = le32_to_cpu(ch->len); |
|
safe_len = safe_len > 0 ? safe_len : 0; |
|
safe_len = min3(safe_len, max_node_len, node_len); |
|
if (safe_len < min_node_len) { |
|
pr_err("node len(%d) is too short for %s, left %d bytes:\n", |
|
safe_len, dbg_ntype(type), |
|
safe_len > UBIFS_CH_SZ ? |
|
safe_len - (int)UBIFS_CH_SZ : 0); |
|
if (safe_len > UBIFS_CH_SZ) |
|
print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 32, 1, |
|
(void *)node + UBIFS_CH_SZ, |
|
safe_len - UBIFS_CH_SZ, 0); |
|
goto out_unlock; |
|
} |
|
if (safe_len != le32_to_cpu(ch->len)) |
|
pr_err("\ttruncated node length %d\n", safe_len); |
|
|
|
switch (type) { |
|
case UBIFS_PAD_NODE: |
|
{ |
|
const struct ubifs_pad_node *pad = node; |
|
|
|
pr_err("\tpad_len %u\n", le32_to_cpu(pad->pad_len)); |
|
break; |
|
} |
|
case UBIFS_SB_NODE: |
|
{ |
|
const struct ubifs_sb_node *sup = node; |
|
unsigned int sup_flags = le32_to_cpu(sup->flags); |
|
|
|
pr_err("\tkey_hash %d (%s)\n", |
|
(int)sup->key_hash, get_key_hash(sup->key_hash)); |
|
pr_err("\tkey_fmt %d (%s)\n", |
|
(int)sup->key_fmt, get_key_fmt(sup->key_fmt)); |
|
pr_err("\tflags %#x\n", sup_flags); |
|
pr_err("\tbig_lpt %u\n", |
|
!!(sup_flags & UBIFS_FLG_BIGLPT)); |
|
pr_err("\tspace_fixup %u\n", |
|
!!(sup_flags & UBIFS_FLG_SPACE_FIXUP)); |
|
pr_err("\tmin_io_size %u\n", le32_to_cpu(sup->min_io_size)); |
|
pr_err("\tleb_size %u\n", le32_to_cpu(sup->leb_size)); |
|
pr_err("\tleb_cnt %u\n", le32_to_cpu(sup->leb_cnt)); |
|
pr_err("\tmax_leb_cnt %u\n", le32_to_cpu(sup->max_leb_cnt)); |
|
pr_err("\tmax_bud_bytes %llu\n", |
|
(unsigned long long)le64_to_cpu(sup->max_bud_bytes)); |
|
pr_err("\tlog_lebs %u\n", le32_to_cpu(sup->log_lebs)); |
|
pr_err("\tlpt_lebs %u\n", le32_to_cpu(sup->lpt_lebs)); |
|
pr_err("\torph_lebs %u\n", le32_to_cpu(sup->orph_lebs)); |
|
pr_err("\tjhead_cnt %u\n", le32_to_cpu(sup->jhead_cnt)); |
|
pr_err("\tfanout %u\n", le32_to_cpu(sup->fanout)); |
|
pr_err("\tlsave_cnt %u\n", le32_to_cpu(sup->lsave_cnt)); |
|
pr_err("\tdefault_compr %u\n", |
|
(int)le16_to_cpu(sup->default_compr)); |
|
pr_err("\trp_size %llu\n", |
|
(unsigned long long)le64_to_cpu(sup->rp_size)); |
|
pr_err("\trp_uid %u\n", le32_to_cpu(sup->rp_uid)); |
|
pr_err("\trp_gid %u\n", le32_to_cpu(sup->rp_gid)); |
|
pr_err("\tfmt_version %u\n", le32_to_cpu(sup->fmt_version)); |
|
pr_err("\ttime_gran %u\n", le32_to_cpu(sup->time_gran)); |
|
pr_err("\tUUID %pUB\n", sup->uuid); |
|
break; |
|
} |
|
case UBIFS_MST_NODE: |
|
{ |
|
const struct ubifs_mst_node *mst = node; |
|
|
|
pr_err("\thighest_inum %llu\n", |
|
(unsigned long long)le64_to_cpu(mst->highest_inum)); |
|
pr_err("\tcommit number %llu\n", |
|
(unsigned long long)le64_to_cpu(mst->cmt_no)); |
|
pr_err("\tflags %#x\n", le32_to_cpu(mst->flags)); |
|
pr_err("\tlog_lnum %u\n", le32_to_cpu(mst->log_lnum)); |
|
pr_err("\troot_lnum %u\n", le32_to_cpu(mst->root_lnum)); |
|
pr_err("\troot_offs %u\n", le32_to_cpu(mst->root_offs)); |
|
pr_err("\troot_len %u\n", le32_to_cpu(mst->root_len)); |
|
pr_err("\tgc_lnum %u\n", le32_to_cpu(mst->gc_lnum)); |
|
pr_err("\tihead_lnum %u\n", le32_to_cpu(mst->ihead_lnum)); |
|
pr_err("\tihead_offs %u\n", le32_to_cpu(mst->ihead_offs)); |
|
pr_err("\tindex_size %llu\n", |
|
(unsigned long long)le64_to_cpu(mst->index_size)); |
|
pr_err("\tlpt_lnum %u\n", le32_to_cpu(mst->lpt_lnum)); |
|
pr_err("\tlpt_offs %u\n", le32_to_cpu(mst->lpt_offs)); |
|
pr_err("\tnhead_lnum %u\n", le32_to_cpu(mst->nhead_lnum)); |
|
pr_err("\tnhead_offs %u\n", le32_to_cpu(mst->nhead_offs)); |
|
pr_err("\tltab_lnum %u\n", le32_to_cpu(mst->ltab_lnum)); |
|
pr_err("\tltab_offs %u\n", le32_to_cpu(mst->ltab_offs)); |
|
pr_err("\tlsave_lnum %u\n", le32_to_cpu(mst->lsave_lnum)); |
|
pr_err("\tlsave_offs %u\n", le32_to_cpu(mst->lsave_offs)); |
|
pr_err("\tlscan_lnum %u\n", le32_to_cpu(mst->lscan_lnum)); |
|
pr_err("\tleb_cnt %u\n", le32_to_cpu(mst->leb_cnt)); |
|
pr_err("\tempty_lebs %u\n", le32_to_cpu(mst->empty_lebs)); |
|
pr_err("\tidx_lebs %u\n", le32_to_cpu(mst->idx_lebs)); |
|
pr_err("\ttotal_free %llu\n", |
|
(unsigned long long)le64_to_cpu(mst->total_free)); |
|
pr_err("\ttotal_dirty %llu\n", |
|
(unsigned long long)le64_to_cpu(mst->total_dirty)); |
|
pr_err("\ttotal_used %llu\n", |
|
(unsigned long long)le64_to_cpu(mst->total_used)); |
|
pr_err("\ttotal_dead %llu\n", |
|
(unsigned long long)le64_to_cpu(mst->total_dead)); |
|
pr_err("\ttotal_dark %llu\n", |
|
(unsigned long long)le64_to_cpu(mst->total_dark)); |
|
break; |
|
} |
|
case UBIFS_REF_NODE: |
|
{ |
|
const struct ubifs_ref_node *ref = node; |
|
|
|
pr_err("\tlnum %u\n", le32_to_cpu(ref->lnum)); |
|
pr_err("\toffs %u\n", le32_to_cpu(ref->offs)); |
|
pr_err("\tjhead %u\n", le32_to_cpu(ref->jhead)); |
|
break; |
|
} |
|
case UBIFS_INO_NODE: |
|
{ |
|
const struct ubifs_ino_node *ino = node; |
|
|
|
key_read(c, &ino->key, &key); |
|
pr_err("\tkey %s\n", |
|
dbg_snprintf_key(c, &key, key_buf, DBG_KEY_BUF_LEN)); |
|
pr_err("\tcreat_sqnum %llu\n", |
|
(unsigned long long)le64_to_cpu(ino->creat_sqnum)); |
|
pr_err("\tsize %llu\n", |
|
(unsigned long long)le64_to_cpu(ino->size)); |
|
pr_err("\tnlink %u\n", le32_to_cpu(ino->nlink)); |
|
pr_err("\tatime %lld.%u\n", |
|
(long long)le64_to_cpu(ino->atime_sec), |
|
le32_to_cpu(ino->atime_nsec)); |
|
pr_err("\tmtime %lld.%u\n", |
|
(long long)le64_to_cpu(ino->mtime_sec), |
|
le32_to_cpu(ino->mtime_nsec)); |
|
pr_err("\tctime %lld.%u\n", |
|
(long long)le64_to_cpu(ino->ctime_sec), |
|
le32_to_cpu(ino->ctime_nsec)); |
|
pr_err("\tuid %u\n", le32_to_cpu(ino->uid)); |
|
pr_err("\tgid %u\n", le32_to_cpu(ino->gid)); |
|
pr_err("\tmode %u\n", le32_to_cpu(ino->mode)); |
|
pr_err("\tflags %#x\n", le32_to_cpu(ino->flags)); |
|
pr_err("\txattr_cnt %u\n", le32_to_cpu(ino->xattr_cnt)); |
|
pr_err("\txattr_size %u\n", le32_to_cpu(ino->xattr_size)); |
|
pr_err("\txattr_names %u\n", le32_to_cpu(ino->xattr_names)); |
|
pr_err("\tcompr_type %#x\n", |
|
(int)le16_to_cpu(ino->compr_type)); |
|
pr_err("\tdata len %u\n", le32_to_cpu(ino->data_len)); |
|
break; |
|
} |
|
case UBIFS_DENT_NODE: |
|
case UBIFS_XENT_NODE: |
|
{ |
|
const struct ubifs_dent_node *dent = node; |
|
int nlen = le16_to_cpu(dent->nlen); |
|
|
|
key_read(c, &dent->key, &key); |
|
pr_err("\tkey %s\n", |
|
dbg_snprintf_key(c, &key, key_buf, DBG_KEY_BUF_LEN)); |
|
pr_err("\tinum %llu\n", |
|
(unsigned long long)le64_to_cpu(dent->inum)); |
|
pr_err("\ttype %d\n", (int)dent->type); |
|
pr_err("\tnlen %d\n", nlen); |
|
pr_err("\tname "); |
|
|
|
if (nlen > UBIFS_MAX_NLEN || |
|
nlen > safe_len - UBIFS_DENT_NODE_SZ) |
|
pr_err("(bad name length, not printing, bad or corrupted node)"); |
|
else { |
|
for (i = 0; i < nlen && dent->name[i]; i++) |
|
pr_cont("%c", isprint(dent->name[i]) ? |
|
dent->name[i] : '?'); |
|
} |
|
pr_cont("\n"); |
|
|
|
break; |
|
} |
|
case UBIFS_DATA_NODE: |
|
{ |
|
const struct ubifs_data_node *dn = node; |
|
|
|
key_read(c, &dn->key, &key); |
|
pr_err("\tkey %s\n", |
|
dbg_snprintf_key(c, &key, key_buf, DBG_KEY_BUF_LEN)); |
|
pr_err("\tsize %u\n", le32_to_cpu(dn->size)); |
|
pr_err("\tcompr_typ %d\n", |
|
(int)le16_to_cpu(dn->compr_type)); |
|
pr_err("\tdata size %u\n", |
|
le32_to_cpu(ch->len) - (unsigned int)UBIFS_DATA_NODE_SZ); |
|
pr_err("\tdata (length = %d):\n", |
|
safe_len - (int)UBIFS_DATA_NODE_SZ); |
|
print_hex_dump(KERN_ERR, "\t", DUMP_PREFIX_OFFSET, 32, 1, |
|
(void *)&dn->data, |
|
safe_len - (int)UBIFS_DATA_NODE_SZ, 0); |
|
break; |
|
} |
|
case UBIFS_TRUN_NODE: |
|
{ |
|
const struct ubifs_trun_node *trun = node; |
|
|
|
pr_err("\tinum %u\n", le32_to_cpu(trun->inum)); |
|
pr_err("\told_size %llu\n", |
|
(unsigned long long)le64_to_cpu(trun->old_size)); |
|
pr_err("\tnew_size %llu\n", |
|
(unsigned long long)le64_to_cpu(trun->new_size)); |
|
break; |
|
} |
|
case UBIFS_IDX_NODE: |
|
{ |
|
const struct ubifs_idx_node *idx = node; |
|
int max_child_cnt = (safe_len - UBIFS_IDX_NODE_SZ) / |
|
(ubifs_idx_node_sz(c, 1) - |
|
UBIFS_IDX_NODE_SZ); |
|
|
|
n = min_t(int, le16_to_cpu(idx->child_cnt), max_child_cnt); |
|
pr_err("\tchild_cnt %d\n", (int)le16_to_cpu(idx->child_cnt)); |
|
pr_err("\tlevel %d\n", (int)le16_to_cpu(idx->level)); |
|
pr_err("\tBranches:\n"); |
|
|
|
for (i = 0; i < n && i < c->fanout; i++) { |
|
const struct ubifs_branch *br; |
|
|
|
br = ubifs_idx_branch(c, idx, i); |
|
key_read(c, &br->key, &key); |
|
pr_err("\t%d: LEB %d:%d len %d key %s\n", |
|
i, le32_to_cpu(br->lnum), le32_to_cpu(br->offs), |
|
le32_to_cpu(br->len), |
|
dbg_snprintf_key(c, &key, key_buf, |
|
DBG_KEY_BUF_LEN)); |
|
} |
|
break; |
|
} |
|
case UBIFS_CS_NODE: |
|
break; |
|
case UBIFS_ORPH_NODE: |
|
{ |
|
const struct ubifs_orph_node *orph = node; |
|
|
|
pr_err("\tcommit number %llu\n", |
|
(unsigned long long) |
|
le64_to_cpu(orph->cmt_no) & LLONG_MAX); |
|
pr_err("\tlast node flag %llu\n", |
|
(unsigned long long)(le64_to_cpu(orph->cmt_no)) >> 63); |
|
n = (safe_len - UBIFS_ORPH_NODE_SZ) >> 3; |
|
pr_err("\t%d orphan inode numbers:\n", n); |
|
for (i = 0; i < n; i++) |
|
pr_err("\t ino %llu\n", |
|
(unsigned long long)le64_to_cpu(orph->inos[i])); |
|
break; |
|
} |
|
case UBIFS_AUTH_NODE: |
|
{ |
|
break; |
|
} |
|
default: |
|
pr_err("node type %d was not recognized\n", type); |
|
} |
|
|
|
out_unlock: |
|
spin_unlock(&dbg_lock); |
|
} |
|
|
|
void ubifs_dump_budget_req(const struct ubifs_budget_req *req) |
|
{ |
|
spin_lock(&dbg_lock); |
|
pr_err("Budgeting request: new_ino %d, dirtied_ino %d\n", |
|
req->new_ino, req->dirtied_ino); |
|
pr_err("\tnew_ino_d %d, dirtied_ino_d %d\n", |
|
req->new_ino_d, req->dirtied_ino_d); |
|
pr_err("\tnew_page %d, dirtied_page %d\n", |
|
req->new_page, req->dirtied_page); |
|
pr_err("\tnew_dent %d, mod_dent %d\n", |
|
req->new_dent, req->mod_dent); |
|
pr_err("\tidx_growth %d\n", req->idx_growth); |
|
pr_err("\tdata_growth %d dd_growth %d\n", |
|
req->data_growth, req->dd_growth); |
|
spin_unlock(&dbg_lock); |
|
} |
|
|
|
void ubifs_dump_lstats(const struct ubifs_lp_stats *lst) |
|
{ |
|
spin_lock(&dbg_lock); |
|
pr_err("(pid %d) Lprops statistics: empty_lebs %d, idx_lebs %d\n", |
|
current->pid, lst->empty_lebs, lst->idx_lebs); |
|
pr_err("\ttaken_empty_lebs %d, total_free %lld, total_dirty %lld\n", |
|
lst->taken_empty_lebs, lst->total_free, lst->total_dirty); |
|
pr_err("\ttotal_used %lld, total_dark %lld, total_dead %lld\n", |
|
lst->total_used, lst->total_dark, lst->total_dead); |
|
spin_unlock(&dbg_lock); |
|
} |
|
|
|
void ubifs_dump_budg(struct ubifs_info *c, const struct ubifs_budg_info *bi) |
|
{ |
|
int i; |
|
struct rb_node *rb; |
|
struct ubifs_bud *bud; |
|
struct ubifs_gced_idx_leb *idx_gc; |
|
long long available, outstanding, free; |
|
|
|
spin_lock(&c->space_lock); |
|
spin_lock(&dbg_lock); |
|
pr_err("(pid %d) Budgeting info: data budget sum %lld, total budget sum %lld\n", |
|
current->pid, bi->data_growth + bi->dd_growth, |
|
bi->data_growth + bi->dd_growth + bi->idx_growth); |
|
pr_err("\tbudg_data_growth %lld, budg_dd_growth %lld, budg_idx_growth %lld\n", |
|
bi->data_growth, bi->dd_growth, bi->idx_growth); |
|
pr_err("\tmin_idx_lebs %d, old_idx_sz %llu, uncommitted_idx %lld\n", |
|
bi->min_idx_lebs, bi->old_idx_sz, bi->uncommitted_idx); |
|
pr_err("\tpage_budget %d, inode_budget %d, dent_budget %d\n", |
|
bi->page_budget, bi->inode_budget, bi->dent_budget); |
|
pr_err("\tnospace %u, nospace_rp %u\n", bi->nospace, bi->nospace_rp); |
|
pr_err("\tdark_wm %d, dead_wm %d, max_idx_node_sz %d\n", |
|
c->dark_wm, c->dead_wm, c->max_idx_node_sz); |
|
|
|
if (bi != &c->bi) |
|
/* |
|
* If we are dumping saved budgeting data, do not print |
|
* additional information which is about the current state, not |
|
* the old one which corresponded to the saved budgeting data. |
|
*/ |
|
goto out_unlock; |
|
|
|
pr_err("\tfreeable_cnt %d, calc_idx_sz %lld, idx_gc_cnt %d\n", |
|
c->freeable_cnt, c->calc_idx_sz, c->idx_gc_cnt); |
|
pr_err("\tdirty_pg_cnt %ld, dirty_zn_cnt %ld, clean_zn_cnt %ld\n", |
|
atomic_long_read(&c->dirty_pg_cnt), |
|
atomic_long_read(&c->dirty_zn_cnt), |
|
atomic_long_read(&c->clean_zn_cnt)); |
|
pr_err("\tgc_lnum %d, ihead_lnum %d\n", c->gc_lnum, c->ihead_lnum); |
|
|
|
/* If we are in R/O mode, journal heads do not exist */ |
|
if (c->jheads) |
|
for (i = 0; i < c->jhead_cnt; i++) |
|
pr_err("\tjhead %s\t LEB %d\n", |
|
dbg_jhead(c->jheads[i].wbuf.jhead), |
|
c->jheads[i].wbuf.lnum); |
|
for (rb = rb_first(&c->buds); rb; rb = rb_next(rb)) { |
|
bud = rb_entry(rb, struct ubifs_bud, rb); |
|
pr_err("\tbud LEB %d\n", bud->lnum); |
|
} |
|
list_for_each_entry(bud, &c->old_buds, list) |
|
pr_err("\told bud LEB %d\n", bud->lnum); |
|
list_for_each_entry(idx_gc, &c->idx_gc, list) |
|
pr_err("\tGC'ed idx LEB %d unmap %d\n", |
|
idx_gc->lnum, idx_gc->unmap); |
|
pr_err("\tcommit state %d\n", c->cmt_state); |
|
|
|
/* Print budgeting predictions */ |
|
available = ubifs_calc_available(c, c->bi.min_idx_lebs); |
|
outstanding = c->bi.data_growth + c->bi.dd_growth; |
|
free = ubifs_get_free_space_nolock(c); |
|
pr_err("Budgeting predictions:\n"); |
|
pr_err("\tavailable: %lld, outstanding %lld, free %lld\n", |
|
available, outstanding, free); |
|
out_unlock: |
|
spin_unlock(&dbg_lock); |
|
spin_unlock(&c->space_lock); |
|
} |
|
|
|
void ubifs_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp) |
|
{ |
|
int i, spc, dark = 0, dead = 0; |
|
struct rb_node *rb; |
|
struct ubifs_bud *bud; |
|
|
|
spc = lp->free + lp->dirty; |
|
if (spc < c->dead_wm) |
|
dead = spc; |
|
else |
|
dark = ubifs_calc_dark(c, spc); |
|
|
|
if (lp->flags & LPROPS_INDEX) |
|
pr_err("LEB %-7d free %-8d dirty %-8d used %-8d free + dirty %-8d flags %#x (", |
|
lp->lnum, lp->free, lp->dirty, c->leb_size - spc, spc, |
|
lp->flags); |
|
else |
|
pr_err("LEB %-7d free %-8d dirty %-8d used %-8d free + dirty %-8d dark %-4d dead %-4d nodes fit %-3d flags %#-4x (", |
|
lp->lnum, lp->free, lp->dirty, c->leb_size - spc, spc, |
|
dark, dead, (int)(spc / UBIFS_MAX_NODE_SZ), lp->flags); |
|
|
|
if (lp->flags & LPROPS_TAKEN) { |
|
if (lp->flags & LPROPS_INDEX) |
|
pr_cont("index, taken"); |
|
else |
|
pr_cont("taken"); |
|
} else { |
|
const char *s; |
|
|
|
if (lp->flags & LPROPS_INDEX) { |
|
switch (lp->flags & LPROPS_CAT_MASK) { |
|
case LPROPS_DIRTY_IDX: |
|
s = "dirty index"; |
|
break; |
|
case LPROPS_FRDI_IDX: |
|
s = "freeable index"; |
|
break; |
|
default: |
|
s = "index"; |
|
} |
|
} else { |
|
switch (lp->flags & LPROPS_CAT_MASK) { |
|
case LPROPS_UNCAT: |
|
s = "not categorized"; |
|
break; |
|
case LPROPS_DIRTY: |
|
s = "dirty"; |
|
break; |
|
case LPROPS_FREE: |
|
s = "free"; |
|
break; |
|
case LPROPS_EMPTY: |
|
s = "empty"; |
|
break; |
|
case LPROPS_FREEABLE: |
|
s = "freeable"; |
|
break; |
|
default: |
|
s = NULL; |
|
break; |
|
} |
|
} |
|
pr_cont("%s", s); |
|
} |
|
|
|
for (rb = rb_first((struct rb_root *)&c->buds); rb; rb = rb_next(rb)) { |
|
bud = rb_entry(rb, struct ubifs_bud, rb); |
|
if (bud->lnum == lp->lnum) { |
|
int head = 0; |
|
for (i = 0; i < c->jhead_cnt; i++) { |
|
/* |
|
* Note, if we are in R/O mode or in the middle |
|
* of mounting/re-mounting, the write-buffers do |
|
* not exist. |
|
*/ |
|
if (c->jheads && |
|
lp->lnum == c->jheads[i].wbuf.lnum) { |
|
pr_cont(", jhead %s", dbg_jhead(i)); |
|
head = 1; |
|
} |
|
} |
|
if (!head) |
|
pr_cont(", bud of jhead %s", |
|
dbg_jhead(bud->jhead)); |
|
} |
|
} |
|
if (lp->lnum == c->gc_lnum) |
|
pr_cont(", GC LEB"); |
|
pr_cont(")\n"); |
|
} |
|
|
|
void ubifs_dump_lprops(struct ubifs_info *c) |
|
{ |
|
int lnum, err; |
|
struct ubifs_lprops lp; |
|
struct ubifs_lp_stats lst; |
|
|
|
pr_err("(pid %d) start dumping LEB properties\n", current->pid); |
|
ubifs_get_lp_stats(c, &lst); |
|
ubifs_dump_lstats(&lst); |
|
|
|
for (lnum = c->main_first; lnum < c->leb_cnt; lnum++) { |
|
err = ubifs_read_one_lp(c, lnum, &lp); |
|
if (err) { |
|
ubifs_err(c, "cannot read lprops for LEB %d", lnum); |
|
continue; |
|
} |
|
|
|
ubifs_dump_lprop(c, &lp); |
|
} |
|
pr_err("(pid %d) finish dumping LEB properties\n", current->pid); |
|
} |
|
|
|
void ubifs_dump_lpt_info(struct ubifs_info *c) |
|
{ |
|
int i; |
|
|
|
spin_lock(&dbg_lock); |
|
pr_err("(pid %d) dumping LPT information\n", current->pid); |
|
pr_err("\tlpt_sz: %lld\n", c->lpt_sz); |
|
pr_err("\tpnode_sz: %d\n", c->pnode_sz); |
|
pr_err("\tnnode_sz: %d\n", c->nnode_sz); |
|
pr_err("\tltab_sz: %d\n", c->ltab_sz); |
|
pr_err("\tlsave_sz: %d\n", c->lsave_sz); |
|
pr_err("\tbig_lpt: %u\n", c->big_lpt); |
|
pr_err("\tlpt_hght: %d\n", c->lpt_hght); |
|
pr_err("\tpnode_cnt: %d\n", c->pnode_cnt); |
|
pr_err("\tnnode_cnt: %d\n", c->nnode_cnt); |
|
pr_err("\tdirty_pn_cnt: %d\n", c->dirty_pn_cnt); |
|
pr_err("\tdirty_nn_cnt: %d\n", c->dirty_nn_cnt); |
|
pr_err("\tlsave_cnt: %d\n", c->lsave_cnt); |
|
pr_err("\tspace_bits: %d\n", c->space_bits); |
|
pr_err("\tlpt_lnum_bits: %d\n", c->lpt_lnum_bits); |
|
pr_err("\tlpt_offs_bits: %d\n", c->lpt_offs_bits); |
|
pr_err("\tlpt_spc_bits: %d\n", c->lpt_spc_bits); |
|
pr_err("\tpcnt_bits: %d\n", c->pcnt_bits); |
|
pr_err("\tlnum_bits: %d\n", c->lnum_bits); |
|
pr_err("\tLPT root is at %d:%d\n", c->lpt_lnum, c->lpt_offs); |
|
pr_err("\tLPT head is at %d:%d\n", |
|
c->nhead_lnum, c->nhead_offs); |
|
pr_err("\tLPT ltab is at %d:%d\n", c->ltab_lnum, c->ltab_offs); |
|
if (c->big_lpt) |
|
pr_err("\tLPT lsave is at %d:%d\n", |
|
c->lsave_lnum, c->lsave_offs); |
|
for (i = 0; i < c->lpt_lebs; i++) |
|
pr_err("\tLPT LEB %d free %d dirty %d tgc %d cmt %d\n", |
|
i + c->lpt_first, c->ltab[i].free, c->ltab[i].dirty, |
|
c->ltab[i].tgc, c->ltab[i].cmt); |
|
spin_unlock(&dbg_lock); |
|
} |
|
|
|
void ubifs_dump_leb(const struct ubifs_info *c, int lnum) |
|
{ |
|
struct ubifs_scan_leb *sleb; |
|
struct ubifs_scan_node *snod; |
|
void *buf; |
|
|
|
pr_err("(pid %d) start dumping LEB %d\n", current->pid, lnum); |
|
|
|
buf = __vmalloc(c->leb_size, GFP_NOFS); |
|
if (!buf) { |
|
ubifs_err(c, "cannot allocate memory for dumping LEB %d", lnum); |
|
return; |
|
} |
|
|
|
sleb = ubifs_scan(c, lnum, 0, buf, 0); |
|
if (IS_ERR(sleb)) { |
|
ubifs_err(c, "scan error %d", (int)PTR_ERR(sleb)); |
|
goto out; |
|
} |
|
|
|
pr_err("LEB %d has %d nodes ending at %d\n", lnum, |
|
sleb->nodes_cnt, sleb->endpt); |
|
|
|
list_for_each_entry(snod, &sleb->nodes, list) { |
|
cond_resched(); |
|
pr_err("Dumping node at LEB %d:%d len %d\n", lnum, |
|
snod->offs, snod->len); |
|
ubifs_dump_node(c, snod->node, c->leb_size - snod->offs); |
|
} |
|
|
|
pr_err("(pid %d) finish dumping LEB %d\n", current->pid, lnum); |
|
ubifs_scan_destroy(sleb); |
|
|
|
out: |
|
vfree(buf); |
|
return; |
|
} |
|
|
|
void ubifs_dump_znode(const struct ubifs_info *c, |
|
const struct ubifs_znode *znode) |
|
{ |
|
int n; |
|
const struct ubifs_zbranch *zbr; |
|
char key_buf[DBG_KEY_BUF_LEN]; |
|
|
|
spin_lock(&dbg_lock); |
|
if (znode->parent) |
|
zbr = &znode->parent->zbranch[znode->iip]; |
|
else |
|
zbr = &c->zroot; |
|
|
|
pr_err("znode %p, LEB %d:%d len %d parent %p iip %d level %d child_cnt %d flags %lx\n", |
|
znode, zbr->lnum, zbr->offs, zbr->len, znode->parent, znode->iip, |
|
znode->level, znode->child_cnt, znode->flags); |
|
|
|
if (znode->child_cnt <= 0 || znode->child_cnt > c->fanout) { |
|
spin_unlock(&dbg_lock); |
|
return; |
|
} |
|
|
|
pr_err("zbranches:\n"); |
|
for (n = 0; n < znode->child_cnt; n++) { |
|
zbr = &znode->zbranch[n]; |
|
if (znode->level > 0) |
|
pr_err("\t%d: znode %p LEB %d:%d len %d key %s\n", |
|
n, zbr->znode, zbr->lnum, zbr->offs, zbr->len, |
|
dbg_snprintf_key(c, &zbr->key, key_buf, |
|
DBG_KEY_BUF_LEN)); |
|
else |
|
pr_err("\t%d: LNC %p LEB %d:%d len %d key %s\n", |
|
n, zbr->znode, zbr->lnum, zbr->offs, zbr->len, |
|
dbg_snprintf_key(c, &zbr->key, key_buf, |
|
DBG_KEY_BUF_LEN)); |
|
} |
|
spin_unlock(&dbg_lock); |
|
} |
|
|
|
void ubifs_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat) |
|
{ |
|
int i; |
|
|
|
pr_err("(pid %d) start dumping heap cat %d (%d elements)\n", |
|
current->pid, cat, heap->cnt); |
|
for (i = 0; i < heap->cnt; i++) { |
|
struct ubifs_lprops *lprops = heap->arr[i]; |
|
|
|
pr_err("\t%d. LEB %d hpos %d free %d dirty %d flags %d\n", |
|
i, lprops->lnum, lprops->hpos, lprops->free, |
|
lprops->dirty, lprops->flags); |
|
} |
|
pr_err("(pid %d) finish dumping heap\n", current->pid); |
|
} |
|
|
|
void ubifs_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode, |
|
struct ubifs_nnode *parent, int iip) |
|
{ |
|
int i; |
|
|
|
pr_err("(pid %d) dumping pnode:\n", current->pid); |
|
pr_err("\taddress %zx parent %zx cnext %zx\n", |
|
(size_t)pnode, (size_t)parent, (size_t)pnode->cnext); |
|
pr_err("\tflags %lu iip %d level %d num %d\n", |
|
pnode->flags, iip, pnode->level, pnode->num); |
|
for (i = 0; i < UBIFS_LPT_FANOUT; i++) { |
|
struct ubifs_lprops *lp = &pnode->lprops[i]; |
|
|
|
pr_err("\t%d: free %d dirty %d flags %d lnum %d\n", |
|
i, lp->free, lp->dirty, lp->flags, lp->lnum); |
|
} |
|
} |
|
|
|
void ubifs_dump_tnc(struct ubifs_info *c) |
|
{ |
|
struct ubifs_znode *znode; |
|
int level; |
|
|
|
pr_err("\n"); |
|
pr_err("(pid %d) start dumping TNC tree\n", current->pid); |
|
znode = ubifs_tnc_levelorder_next(c, c->zroot.znode, NULL); |
|
level = znode->level; |
|
pr_err("== Level %d ==\n", level); |
|
while (znode) { |
|
if (level != znode->level) { |
|
level = znode->level; |
|
pr_err("== Level %d ==\n", level); |
|
} |
|
ubifs_dump_znode(c, znode); |
|
znode = ubifs_tnc_levelorder_next(c, c->zroot.znode, znode); |
|
} |
|
pr_err("(pid %d) finish dumping TNC tree\n", current->pid); |
|
} |
|
|
|
static int dump_znode(struct ubifs_info *c, struct ubifs_znode *znode, |
|
void *priv) |
|
{ |
|
ubifs_dump_znode(c, znode); |
|
return 0; |
|
} |
|
|
|
/** |
|
* ubifs_dump_index - dump the on-flash index. |
|
* @c: UBIFS file-system description object |
|
* |
|
* This function dumps whole UBIFS indexing B-tree, unlike 'ubifs_dump_tnc()' |
|
* which dumps only in-memory znodes and does not read znodes which from flash. |
|
*/ |
|
void ubifs_dump_index(struct ubifs_info *c) |
|
{ |
|
dbg_walk_index(c, NULL, dump_znode, NULL); |
|
} |
|
|
|
/** |
|
* dbg_save_space_info - save information about flash space. |
|
* @c: UBIFS file-system description object |
|
* |
|
* This function saves information about UBIFS free space, dirty space, etc, in |
|
* order to check it later. |
|
*/ |
|
void dbg_save_space_info(struct ubifs_info *c) |
|
{ |
|
struct ubifs_debug_info *d = c->dbg; |
|
int freeable_cnt; |
|
|
|
spin_lock(&c->space_lock); |
|
memcpy(&d->saved_lst, &c->lst, sizeof(struct ubifs_lp_stats)); |
|
memcpy(&d->saved_bi, &c->bi, sizeof(struct ubifs_budg_info)); |
|
d->saved_idx_gc_cnt = c->idx_gc_cnt; |
|
|
|
/* |
|
* We use a dirty hack here and zero out @c->freeable_cnt, because it |
|
* affects the free space calculations, and UBIFS might not know about |
|
* all freeable eraseblocks. Indeed, we know about freeable eraseblocks |
|
* only when we read their lprops, and we do this only lazily, upon the |
|
* need. So at any given point of time @c->freeable_cnt might be not |
|
* exactly accurate. |
|
* |
|
* Just one example about the issue we hit when we did not zero |
|
* @c->freeable_cnt. |
|
* 1. The file-system is mounted R/O, c->freeable_cnt is %0. We save the |
|
* amount of free space in @d->saved_free |
|
* 2. We re-mount R/W, which makes UBIFS to read the "lsave" |
|
* information from flash, where we cache LEBs from various |
|
* categories ('ubifs_remount_fs()' -> 'ubifs_lpt_init()' |
|
* -> 'lpt_init_wr()' -> 'read_lsave()' -> 'ubifs_lpt_lookup()' |
|
* -> 'ubifs_get_pnode()' -> 'update_cats()' |
|
* -> 'ubifs_add_to_cat()'). |
|
* 3. Lsave contains a freeable eraseblock, and @c->freeable_cnt |
|
* becomes %1. |
|
* 4. We calculate the amount of free space when the re-mount is |
|
* finished in 'dbg_check_space_info()' and it does not match |
|
* @d->saved_free. |
|
*/ |
|
freeable_cnt = c->freeable_cnt; |
|
c->freeable_cnt = 0; |
|
d->saved_free = ubifs_get_free_space_nolock(c); |
|
c->freeable_cnt = freeable_cnt; |
|
spin_unlock(&c->space_lock); |
|
} |
|
|
|
/** |
|
* dbg_check_space_info - check flash space information. |
|
* @c: UBIFS file-system description object |
|
* |
|
* This function compares current flash space information with the information |
|
* which was saved when the 'dbg_save_space_info()' function was called. |
|
* Returns zero if the information has not changed, and %-EINVAL if it has |
|
* changed. |
|
*/ |
|
int dbg_check_space_info(struct ubifs_info *c) |
|
{ |
|
struct ubifs_debug_info *d = c->dbg; |
|
struct ubifs_lp_stats lst; |
|
long long free; |
|
int freeable_cnt; |
|
|
|
spin_lock(&c->space_lock); |
|
freeable_cnt = c->freeable_cnt; |
|
c->freeable_cnt = 0; |
|
free = ubifs_get_free_space_nolock(c); |
|
c->freeable_cnt = freeable_cnt; |
|
spin_unlock(&c->space_lock); |
|
|
|
if (free != d->saved_free) { |
|
ubifs_err(c, "free space changed from %lld to %lld", |
|
d->saved_free, free); |
|
goto out; |
|
} |
|
|
|
return 0; |
|
|
|
out: |
|
ubifs_msg(c, "saved lprops statistics dump"); |
|
ubifs_dump_lstats(&d->saved_lst); |
|
ubifs_msg(c, "saved budgeting info dump"); |
|
ubifs_dump_budg(c, &d->saved_bi); |
|
ubifs_msg(c, "saved idx_gc_cnt %d", d->saved_idx_gc_cnt); |
|
ubifs_msg(c, "current lprops statistics dump"); |
|
ubifs_get_lp_stats(c, &lst); |
|
ubifs_dump_lstats(&lst); |
|
ubifs_msg(c, "current budgeting info dump"); |
|
ubifs_dump_budg(c, &c->bi); |
|
dump_stack(); |
|
return -EINVAL; |
|
} |
|
|
|
/** |
|
* dbg_check_synced_i_size - check synchronized inode size. |
|
* @c: UBIFS file-system description object |
|
* @inode: inode to check |
|
* |
|
* If inode is clean, synchronized inode size has to be equivalent to current |
|
* inode size. This function has to be called only for locked inodes (@i_mutex |
|
* has to be locked). Returns %0 if synchronized inode size if correct, and |
|
* %-EINVAL if not. |
|
*/ |
|
int dbg_check_synced_i_size(const struct ubifs_info *c, struct inode *inode) |
|
{ |
|
int err = 0; |
|
struct ubifs_inode *ui = ubifs_inode(inode); |
|
|
|
if (!dbg_is_chk_gen(c)) |
|
return 0; |
|
if (!S_ISREG(inode->i_mode)) |
|
return 0; |
|
|
|
mutex_lock(&ui->ui_mutex); |
|
spin_lock(&ui->ui_lock); |
|
if (ui->ui_size != ui->synced_i_size && !ui->dirty) { |
|
ubifs_err(c, "ui_size is %lld, synced_i_size is %lld, but inode is clean", |
|
ui->ui_size, ui->synced_i_size); |
|
ubifs_err(c, "i_ino %lu, i_mode %#x, i_size %lld", inode->i_ino, |
|
inode->i_mode, i_size_read(inode)); |
|
dump_stack(); |
|
err = -EINVAL; |
|
} |
|
spin_unlock(&ui->ui_lock); |
|
mutex_unlock(&ui->ui_mutex); |
|
return err; |
|
} |
|
|
|
/* |
|
* dbg_check_dir - check directory inode size and link count. |
|
* @c: UBIFS file-system description object |
|
* @dir: the directory to calculate size for |
|
* @size: the result is returned here |
|
* |
|
* This function makes sure that directory size and link count are correct. |
|
* Returns zero in case of success and a negative error code in case of |
|
* failure. |
|
* |
|
* Note, it is good idea to make sure the @dir->i_mutex is locked before |
|
* calling this function. |
|
*/ |
|
int dbg_check_dir(struct ubifs_info *c, const struct inode *dir) |
|
{ |
|
unsigned int nlink = 2; |
|
union ubifs_key key; |
|
struct ubifs_dent_node *dent, *pdent = NULL; |
|
struct fscrypt_name nm = {0}; |
|
loff_t size = UBIFS_INO_NODE_SZ; |
|
|
|
if (!dbg_is_chk_gen(c)) |
|
return 0; |
|
|
|
if (!S_ISDIR(dir->i_mode)) |
|
return 0; |
|
|
|
lowest_dent_key(c, &key, dir->i_ino); |
|
while (1) { |
|
int err; |
|
|
|
dent = ubifs_tnc_next_ent(c, &key, &nm); |
|
if (IS_ERR(dent)) { |
|
err = PTR_ERR(dent); |
|
if (err == -ENOENT) |
|
break; |
|
kfree(pdent); |
|
return err; |
|
} |
|
|
|
fname_name(&nm) = dent->name; |
|
fname_len(&nm) = le16_to_cpu(dent->nlen); |
|
size += CALC_DENT_SIZE(fname_len(&nm)); |
|
if (dent->type == UBIFS_ITYPE_DIR) |
|
nlink += 1; |
|
kfree(pdent); |
|
pdent = dent; |
|
key_read(c, &dent->key, &key); |
|
} |
|
kfree(pdent); |
|
|
|
if (i_size_read(dir) != size) { |
|
ubifs_err(c, "directory inode %lu has size %llu, but calculated size is %llu", |
|
dir->i_ino, (unsigned long long)i_size_read(dir), |
|
(unsigned long long)size); |
|
ubifs_dump_inode(c, dir); |
|
dump_stack(); |
|
return -EINVAL; |
|
} |
|
if (dir->i_nlink != nlink) { |
|
ubifs_err(c, "directory inode %lu has nlink %u, but calculated nlink is %u", |
|
dir->i_ino, dir->i_nlink, nlink); |
|
ubifs_dump_inode(c, dir); |
|
dump_stack(); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* dbg_check_key_order - make sure that colliding keys are properly ordered. |
|
* @c: UBIFS file-system description object |
|
* @zbr1: first zbranch |
|
* @zbr2: following zbranch |
|
* |
|
* In UBIFS indexing B-tree colliding keys has to be sorted in binary order of |
|
* names of the direntries/xentries which are referred by the keys. This |
|
* function reads direntries/xentries referred by @zbr1 and @zbr2 and makes |
|
* sure the name of direntry/xentry referred by @zbr1 is less than |
|
* direntry/xentry referred by @zbr2. Returns zero if this is true, %1 if not, |
|
* and a negative error code in case of failure. |
|
*/ |
|
static int dbg_check_key_order(struct ubifs_info *c, struct ubifs_zbranch *zbr1, |
|
struct ubifs_zbranch *zbr2) |
|
{ |
|
int err, nlen1, nlen2, cmp; |
|
struct ubifs_dent_node *dent1, *dent2; |
|
union ubifs_key key; |
|
char key_buf[DBG_KEY_BUF_LEN]; |
|
|
|
ubifs_assert(c, !keys_cmp(c, &zbr1->key, &zbr2->key)); |
|
dent1 = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS); |
|
if (!dent1) |
|
return -ENOMEM; |
|
dent2 = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS); |
|
if (!dent2) { |
|
err = -ENOMEM; |
|
goto out_free; |
|
} |
|
|
|
err = ubifs_tnc_read_node(c, zbr1, dent1); |
|
if (err) |
|
goto out_free; |
|
err = ubifs_validate_entry(c, dent1); |
|
if (err) |
|
goto out_free; |
|
|
|
err = ubifs_tnc_read_node(c, zbr2, dent2); |
|
if (err) |
|
goto out_free; |
|
err = ubifs_validate_entry(c, dent2); |
|
if (err) |
|
goto out_free; |
|
|
|
/* Make sure node keys are the same as in zbranch */ |
|
err = 1; |
|
key_read(c, &dent1->key, &key); |
|
if (keys_cmp(c, &zbr1->key, &key)) { |
|
ubifs_err(c, "1st entry at %d:%d has key %s", zbr1->lnum, |
|
zbr1->offs, dbg_snprintf_key(c, &key, key_buf, |
|
DBG_KEY_BUF_LEN)); |
|
ubifs_err(c, "but it should have key %s according to tnc", |
|
dbg_snprintf_key(c, &zbr1->key, key_buf, |
|
DBG_KEY_BUF_LEN)); |
|
ubifs_dump_node(c, dent1, UBIFS_MAX_DENT_NODE_SZ); |
|
goto out_free; |
|
} |
|
|
|
key_read(c, &dent2->key, &key); |
|
if (keys_cmp(c, &zbr2->key, &key)) { |
|
ubifs_err(c, "2nd entry at %d:%d has key %s", zbr1->lnum, |
|
zbr1->offs, dbg_snprintf_key(c, &key, key_buf, |
|
DBG_KEY_BUF_LEN)); |
|
ubifs_err(c, "but it should have key %s according to tnc", |
|
dbg_snprintf_key(c, &zbr2->key, key_buf, |
|
DBG_KEY_BUF_LEN)); |
|
ubifs_dump_node(c, dent2, UBIFS_MAX_DENT_NODE_SZ); |
|
goto out_free; |
|
} |
|
|
|
nlen1 = le16_to_cpu(dent1->nlen); |
|
nlen2 = le16_to_cpu(dent2->nlen); |
|
|
|
cmp = memcmp(dent1->name, dent2->name, min_t(int, nlen1, nlen2)); |
|
if (cmp < 0 || (cmp == 0 && nlen1 < nlen2)) { |
|
err = 0; |
|
goto out_free; |
|
} |
|
if (cmp == 0 && nlen1 == nlen2) |
|
ubifs_err(c, "2 xent/dent nodes with the same name"); |
|
else |
|
ubifs_err(c, "bad order of colliding key %s", |
|
dbg_snprintf_key(c, &key, key_buf, DBG_KEY_BUF_LEN)); |
|
|
|
ubifs_msg(c, "first node at %d:%d\n", zbr1->lnum, zbr1->offs); |
|
ubifs_dump_node(c, dent1, UBIFS_MAX_DENT_NODE_SZ); |
|
ubifs_msg(c, "second node at %d:%d\n", zbr2->lnum, zbr2->offs); |
|
ubifs_dump_node(c, dent2, UBIFS_MAX_DENT_NODE_SZ); |
|
|
|
out_free: |
|
kfree(dent2); |
|
kfree(dent1); |
|
return err; |
|
} |
|
|
|
/** |
|
* dbg_check_znode - check if znode is all right. |
|
* @c: UBIFS file-system description object |
|
* @zbr: zbranch which points to this znode |
|
* |
|
* This function makes sure that znode referred to by @zbr is all right. |
|
* Returns zero if it is, and %-EINVAL if it is not. |
|
*/ |
|
static int dbg_check_znode(struct ubifs_info *c, struct ubifs_zbranch *zbr) |
|
{ |
|
struct ubifs_znode *znode = zbr->znode; |
|
struct ubifs_znode *zp = znode->parent; |
|
int n, err, cmp; |
|
|
|
if (znode->child_cnt <= 0 || znode->child_cnt > c->fanout) { |
|
err = 1; |
|
goto out; |
|
} |
|
if (znode->level < 0) { |
|
err = 2; |
|
goto out; |
|
} |
|
if (znode->iip < 0 || znode->iip >= c->fanout) { |
|
err = 3; |
|
goto out; |
|
} |
|
|
|
if (zbr->len == 0) |
|
/* Only dirty zbranch may have no on-flash nodes */ |
|
if (!ubifs_zn_dirty(znode)) { |
|
err = 4; |
|
goto out; |
|
} |
|
|
|
if (ubifs_zn_dirty(znode)) { |
|
/* |
|
* If znode is dirty, its parent has to be dirty as well. The |
|
* order of the operation is important, so we have to have |
|
* memory barriers. |
|
*/ |
|
smp_mb(); |
|
if (zp && !ubifs_zn_dirty(zp)) { |
|
/* |
|
* The dirty flag is atomic and is cleared outside the |
|
* TNC mutex, so znode's dirty flag may now have |
|
* been cleared. The child is always cleared before the |
|
* parent, so we just need to check again. |
|
*/ |
|
smp_mb(); |
|
if (ubifs_zn_dirty(znode)) { |
|
err = 5; |
|
goto out; |
|
} |
|
} |
|
} |
|
|
|
if (zp) { |
|
const union ubifs_key *min, *max; |
|
|
|
if (znode->level != zp->level - 1) { |
|
err = 6; |
|
goto out; |
|
} |
|
|
|
/* Make sure the 'parent' pointer in our znode is correct */ |
|
err = ubifs_search_zbranch(c, zp, &zbr->key, &n); |
|
if (!err) { |
|
/* This zbranch does not exist in the parent */ |
|
err = 7; |
|
goto out; |
|
} |
|
|
|
if (znode->iip >= zp->child_cnt) { |
|
err = 8; |
|
goto out; |
|
} |
|
|
|
if (znode->iip != n) { |
|
/* This may happen only in case of collisions */ |
|
if (keys_cmp(c, &zp->zbranch[n].key, |
|
&zp->zbranch[znode->iip].key)) { |
|
err = 9; |
|
goto out; |
|
} |
|
n = znode->iip; |
|
} |
|
|
|
/* |
|
* Make sure that the first key in our znode is greater than or |
|
* equal to the key in the pointing zbranch. |
|
*/ |
|
min = &zbr->key; |
|
cmp = keys_cmp(c, min, &znode->zbranch[0].key); |
|
if (cmp == 1) { |
|
err = 10; |
|
goto out; |
|
} |
|
|
|
if (n + 1 < zp->child_cnt) { |
|
max = &zp->zbranch[n + 1].key; |
|
|
|
/* |
|
* Make sure the last key in our znode is less or |
|
* equivalent than the key in the zbranch which goes |
|
* after our pointing zbranch. |
|
*/ |
|
cmp = keys_cmp(c, max, |
|
&znode->zbranch[znode->child_cnt - 1].key); |
|
if (cmp == -1) { |
|
err = 11; |
|
goto out; |
|
} |
|
} |
|
} else { |
|
/* This may only be root znode */ |
|
if (zbr != &c->zroot) { |
|
err = 12; |
|
goto out; |
|
} |
|
} |
|
|
|
/* |
|
* Make sure that next key is greater or equivalent then the previous |
|
* one. |
|
*/ |
|
for (n = 1; n < znode->child_cnt; n++) { |
|
cmp = keys_cmp(c, &znode->zbranch[n - 1].key, |
|
&znode->zbranch[n].key); |
|
if (cmp > 0) { |
|
err = 13; |
|
goto out; |
|
} |
|
if (cmp == 0) { |
|
/* This can only be keys with colliding hash */ |
|
if (!is_hash_key(c, &znode->zbranch[n].key)) { |
|
err = 14; |
|
goto out; |
|
} |
|
|
|
if (znode->level != 0 || c->replaying) |
|
continue; |
|
|
|
/* |
|
* Colliding keys should follow binary order of |
|
* corresponding xentry/dentry names. |
|
*/ |
|
err = dbg_check_key_order(c, &znode->zbranch[n - 1], |
|
&znode->zbranch[n]); |
|
if (err < 0) |
|
return err; |
|
if (err) { |
|
err = 15; |
|
goto out; |
|
} |
|
} |
|
} |
|
|
|
for (n = 0; n < znode->child_cnt; n++) { |
|
if (!znode->zbranch[n].znode && |
|
(znode->zbranch[n].lnum == 0 || |
|
znode->zbranch[n].len == 0)) { |
|
err = 16; |
|
goto out; |
|
} |
|
|
|
if (znode->zbranch[n].lnum != 0 && |
|
znode->zbranch[n].len == 0) { |
|
err = 17; |
|
goto out; |
|
} |
|
|
|
if (znode->zbranch[n].lnum == 0 && |
|
znode->zbranch[n].len != 0) { |
|
err = 18; |
|
goto out; |
|
} |
|
|
|
if (znode->zbranch[n].lnum == 0 && |
|
znode->zbranch[n].offs != 0) { |
|
err = 19; |
|
goto out; |
|
} |
|
|
|
if (znode->level != 0 && znode->zbranch[n].znode) |
|
if (znode->zbranch[n].znode->parent != znode) { |
|
err = 20; |
|
goto out; |
|
} |
|
} |
|
|
|
return 0; |
|
|
|
out: |
|
ubifs_err(c, "failed, error %d", err); |
|
ubifs_msg(c, "dump of the znode"); |
|
ubifs_dump_znode(c, znode); |
|
if (zp) { |
|
ubifs_msg(c, "dump of the parent znode"); |
|
ubifs_dump_znode(c, zp); |
|
} |
|
dump_stack(); |
|
return -EINVAL; |
|
} |
|
|
|
/** |
|
* dbg_check_tnc - check TNC tree. |
|
* @c: UBIFS file-system description object |
|
* @extra: do extra checks that are possible at start commit |
|
* |
|
* This function traverses whole TNC tree and checks every znode. Returns zero |
|
* if everything is all right and %-EINVAL if something is wrong with TNC. |
|
*/ |
|
int dbg_check_tnc(struct ubifs_info *c, int extra) |
|
{ |
|
struct ubifs_znode *znode; |
|
long clean_cnt = 0, dirty_cnt = 0; |
|
int err, last; |
|
|
|
if (!dbg_is_chk_index(c)) |
|
return 0; |
|
|
|
ubifs_assert(c, mutex_is_locked(&c->tnc_mutex)); |
|
if (!c->zroot.znode) |
|
return 0; |
|
|
|
znode = ubifs_tnc_postorder_first(c->zroot.znode); |
|
while (1) { |
|
struct ubifs_znode *prev; |
|
struct ubifs_zbranch *zbr; |
|
|
|
if (!znode->parent) |
|
zbr = &c->zroot; |
|
else |
|
zbr = &znode->parent->zbranch[znode->iip]; |
|
|
|
err = dbg_check_znode(c, zbr); |
|
if (err) |
|
return err; |
|
|
|
if (extra) { |
|
if (ubifs_zn_dirty(znode)) |
|
dirty_cnt += 1; |
|
else |
|
clean_cnt += 1; |
|
} |
|
|
|
prev = znode; |
|
znode = ubifs_tnc_postorder_next(c, znode); |
|
if (!znode) |
|
break; |
|
|
|
/* |
|
* If the last key of this znode is equivalent to the first key |
|
* of the next znode (collision), then check order of the keys. |
|
*/ |
|
last = prev->child_cnt - 1; |
|
if (prev->level == 0 && znode->level == 0 && !c->replaying && |
|
!keys_cmp(c, &prev->zbranch[last].key, |
|
&znode->zbranch[0].key)) { |
|
err = dbg_check_key_order(c, &prev->zbranch[last], |
|
&znode->zbranch[0]); |
|
if (err < 0) |
|
return err; |
|
if (err) { |
|
ubifs_msg(c, "first znode"); |
|
ubifs_dump_znode(c, prev); |
|
ubifs_msg(c, "second znode"); |
|
ubifs_dump_znode(c, znode); |
|
return -EINVAL; |
|
} |
|
} |
|
} |
|
|
|
if (extra) { |
|
if (clean_cnt != atomic_long_read(&c->clean_zn_cnt)) { |
|
ubifs_err(c, "incorrect clean_zn_cnt %ld, calculated %ld", |
|
atomic_long_read(&c->clean_zn_cnt), |
|
clean_cnt); |
|
return -EINVAL; |
|
} |
|
if (dirty_cnt != atomic_long_read(&c->dirty_zn_cnt)) { |
|
ubifs_err(c, "incorrect dirty_zn_cnt %ld, calculated %ld", |
|
atomic_long_read(&c->dirty_zn_cnt), |
|
dirty_cnt); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* dbg_walk_index - walk the on-flash index. |
|
* @c: UBIFS file-system description object |
|
* @leaf_cb: called for each leaf node |
|
* @znode_cb: called for each indexing node |
|
* @priv: private data which is passed to callbacks |
|
* |
|
* This function walks the UBIFS index and calls the @leaf_cb for each leaf |
|
* node and @znode_cb for each indexing node. Returns zero in case of success |
|
* and a negative error code in case of failure. |
|
* |
|
* It would be better if this function removed every znode it pulled to into |
|
* the TNC, so that the behavior more closely matched the non-debugging |
|
* behavior. |
|
*/ |
|
int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb, |
|
dbg_znode_callback znode_cb, void *priv) |
|
{ |
|
int err; |
|
struct ubifs_zbranch *zbr; |
|
struct ubifs_znode *znode, *child; |
|
|
|
mutex_lock(&c->tnc_mutex); |
|
/* If the root indexing node is not in TNC - pull it */ |
|
if (!c->zroot.znode) { |
|
c->zroot.znode = ubifs_load_znode(c, &c->zroot, NULL, 0); |
|
if (IS_ERR(c->zroot.znode)) { |
|
err = PTR_ERR(c->zroot.znode); |
|
c->zroot.znode = NULL; |
|
goto out_unlock; |
|
} |
|
} |
|
|
|
/* |
|
* We are going to traverse the indexing tree in the postorder manner. |
|
* Go down and find the leftmost indexing node where we are going to |
|
* start from. |
|
*/ |
|
znode = c->zroot.znode; |
|
while (znode->level > 0) { |
|
zbr = &znode->zbranch[0]; |
|
child = zbr->znode; |
|
if (!child) { |
|
child = ubifs_load_znode(c, zbr, znode, 0); |
|
if (IS_ERR(child)) { |
|
err = PTR_ERR(child); |
|
goto out_unlock; |
|
} |
|
} |
|
|
|
znode = child; |
|
} |
|
|
|
/* Iterate over all indexing nodes */ |
|
while (1) { |
|
int idx; |
|
|
|
cond_resched(); |
|
|
|
if (znode_cb) { |
|
err = znode_cb(c, znode, priv); |
|
if (err) { |
|
ubifs_err(c, "znode checking function returned error %d", |
|
err); |
|
ubifs_dump_znode(c, znode); |
|
goto out_dump; |
|
} |
|
} |
|
if (leaf_cb && znode->level == 0) { |
|
for (idx = 0; idx < znode->child_cnt; idx++) { |
|
zbr = &znode->zbranch[idx]; |
|
err = leaf_cb(c, zbr, priv); |
|
if (err) { |
|
ubifs_err(c, "leaf checking function returned error %d, for leaf at LEB %d:%d", |
|
err, zbr->lnum, zbr->offs); |
|
goto out_dump; |
|
} |
|
} |
|
} |
|
|
|
if (!znode->parent) |
|
break; |
|
|
|
idx = znode->iip + 1; |
|
znode = znode->parent; |
|
if (idx < znode->child_cnt) { |
|
/* Switch to the next index in the parent */ |
|
zbr = &znode->zbranch[idx]; |
|
child = zbr->znode; |
|
if (!child) { |
|
child = ubifs_load_znode(c, zbr, znode, idx); |
|
if (IS_ERR(child)) { |
|
err = PTR_ERR(child); |
|
goto out_unlock; |
|
} |
|
zbr->znode = child; |
|
} |
|
znode = child; |
|
} else |
|
/* |
|
* This is the last child, switch to the parent and |
|
* continue. |
|
*/ |
|
continue; |
|
|
|
/* Go to the lowest leftmost znode in the new sub-tree */ |
|
while (znode->level > 0) { |
|
zbr = &znode->zbranch[0]; |
|
child = zbr->znode; |
|
if (!child) { |
|
child = ubifs_load_znode(c, zbr, znode, 0); |
|
if (IS_ERR(child)) { |
|
err = PTR_ERR(child); |
|
goto out_unlock; |
|
} |
|
zbr->znode = child; |
|
} |
|
znode = child; |
|
} |
|
} |
|
|
|
mutex_unlock(&c->tnc_mutex); |
|
return 0; |
|
|
|
out_dump: |
|
if (znode->parent) |
|
zbr = &znode->parent->zbranch[znode->iip]; |
|
else |
|
zbr = &c->zroot; |
|
ubifs_msg(c, "dump of znode at LEB %d:%d", zbr->lnum, zbr->offs); |
|
ubifs_dump_znode(c, znode); |
|
out_unlock: |
|
mutex_unlock(&c->tnc_mutex); |
|
return err; |
|
} |
|
|
|
/** |
|
* add_size - add znode size to partially calculated index size. |
|
* @c: UBIFS file-system description object |
|
* @znode: znode to add size for |
|
* @priv: partially calculated index size |
|
* |
|
* This is a helper function for 'dbg_check_idx_size()' which is called for |
|
* every indexing node and adds its size to the 'long long' variable pointed to |
|
* by @priv. |
|
*/ |
|
static int add_size(struct ubifs_info *c, struct ubifs_znode *znode, void *priv) |
|
{ |
|
long long *idx_size = priv; |
|
int add; |
|
|
|
add = ubifs_idx_node_sz(c, znode->child_cnt); |
|
add = ALIGN(add, 8); |
|
*idx_size += add; |
|
return 0; |
|
} |
|
|
|
/** |
|
* dbg_check_idx_size - check index size. |
|
* @c: UBIFS file-system description object |
|
* @idx_size: size to check |
|
* |
|
* This function walks the UBIFS index, calculates its size and checks that the |
|
* size is equivalent to @idx_size. Returns zero in case of success and a |
|
* negative error code in case of failure. |
|
*/ |
|
int dbg_check_idx_size(struct ubifs_info *c, long long idx_size) |
|
{ |
|
int err; |
|
long long calc = 0; |
|
|
|
if (!dbg_is_chk_index(c)) |
|
return 0; |
|
|
|
err = dbg_walk_index(c, NULL, add_size, &calc); |
|
if (err) { |
|
ubifs_err(c, "error %d while walking the index", err); |
|
return err; |
|
} |
|
|
|
if (calc != idx_size) { |
|
ubifs_err(c, "index size check failed: calculated size is %lld, should be %lld", |
|
calc, idx_size); |
|
dump_stack(); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* struct fsck_inode - information about an inode used when checking the file-system. |
|
* @rb: link in the RB-tree of inodes |
|
* @inum: inode number |
|
* @mode: inode type, permissions, etc |
|
* @nlink: inode link count |
|
* @xattr_cnt: count of extended attributes |
|
* @references: how many directory/xattr entries refer this inode (calculated |
|
* while walking the index) |
|
* @calc_cnt: for directory inode count of child directories |
|
* @size: inode size (read from on-flash inode) |
|
* @xattr_sz: summary size of all extended attributes (read from on-flash |
|
* inode) |
|
* @calc_sz: for directories calculated directory size |
|
* @calc_xcnt: count of extended attributes |
|
* @calc_xsz: calculated summary size of all extended attributes |
|
* @xattr_nms: sum of lengths of all extended attribute names belonging to this |
|
* inode (read from on-flash inode) |
|
* @calc_xnms: calculated sum of lengths of all extended attribute names |
|
*/ |
|
struct fsck_inode { |
|
struct rb_node rb; |
|
ino_t inum; |
|
umode_t mode; |
|
unsigned int nlink; |
|
unsigned int xattr_cnt; |
|
int references; |
|
int calc_cnt; |
|
long long size; |
|
unsigned int xattr_sz; |
|
long long calc_sz; |
|
long long calc_xcnt; |
|
long long calc_xsz; |
|
unsigned int xattr_nms; |
|
long long calc_xnms; |
|
}; |
|
|
|
/** |
|
* struct fsck_data - private FS checking information. |
|
* @inodes: RB-tree of all inodes (contains @struct fsck_inode objects) |
|
*/ |
|
struct fsck_data { |
|
struct rb_root inodes; |
|
}; |
|
|
|
/** |
|
* add_inode - add inode information to RB-tree of inodes. |
|
* @c: UBIFS file-system description object |
|
* @fsckd: FS checking information |
|
* @ino: raw UBIFS inode to add |
|
* |
|
* This is a helper function for 'check_leaf()' which adds information about |
|
* inode @ino to the RB-tree of inodes. Returns inode information pointer in |
|
* case of success and a negative error code in case of failure. |
|
*/ |
|
static struct fsck_inode *add_inode(struct ubifs_info *c, |
|
struct fsck_data *fsckd, |
|
struct ubifs_ino_node *ino) |
|
{ |
|
struct rb_node **p, *parent = NULL; |
|
struct fsck_inode *fscki; |
|
ino_t inum = key_inum_flash(c, &ino->key); |
|
struct inode *inode; |
|
struct ubifs_inode *ui; |
|
|
|
p = &fsckd->inodes.rb_node; |
|
while (*p) { |
|
parent = *p; |
|
fscki = rb_entry(parent, struct fsck_inode, rb); |
|
if (inum < fscki->inum) |
|
p = &(*p)->rb_left; |
|
else if (inum > fscki->inum) |
|
p = &(*p)->rb_right; |
|
else |
|
return fscki; |
|
} |
|
|
|
if (inum > c->highest_inum) { |
|
ubifs_err(c, "too high inode number, max. is %lu", |
|
(unsigned long)c->highest_inum); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
fscki = kzalloc(sizeof(struct fsck_inode), GFP_NOFS); |
|
if (!fscki) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
inode = ilookup(c->vfs_sb, inum); |
|
|
|
fscki->inum = inum; |
|
/* |
|
* If the inode is present in the VFS inode cache, use it instead of |
|
* the on-flash inode which might be out-of-date. E.g., the size might |
|
* be out-of-date. If we do not do this, the following may happen, for |
|
* example: |
|
* 1. A power cut happens |
|
* 2. We mount the file-system R/O, the replay process fixes up the |
|
* inode size in the VFS cache, but on on-flash. |
|
* 3. 'check_leaf()' fails because it hits a data node beyond inode |
|
* size. |
|
*/ |
|
if (!inode) { |
|
fscki->nlink = le32_to_cpu(ino->nlink); |
|
fscki->size = le64_to_cpu(ino->size); |
|
fscki->xattr_cnt = le32_to_cpu(ino->xattr_cnt); |
|
fscki->xattr_sz = le32_to_cpu(ino->xattr_size); |
|
fscki->xattr_nms = le32_to_cpu(ino->xattr_names); |
|
fscki->mode = le32_to_cpu(ino->mode); |
|
} else { |
|
ui = ubifs_inode(inode); |
|
fscki->nlink = inode->i_nlink; |
|
fscki->size = inode->i_size; |
|
fscki->xattr_cnt = ui->xattr_cnt; |
|
fscki->xattr_sz = ui->xattr_size; |
|
fscki->xattr_nms = ui->xattr_names; |
|
fscki->mode = inode->i_mode; |
|
iput(inode); |
|
} |
|
|
|
if (S_ISDIR(fscki->mode)) { |
|
fscki->calc_sz = UBIFS_INO_NODE_SZ; |
|
fscki->calc_cnt = 2; |
|
} |
|
|
|
rb_link_node(&fscki->rb, parent, p); |
|
rb_insert_color(&fscki->rb, &fsckd->inodes); |
|
|
|
return fscki; |
|
} |
|
|
|
/** |
|
* search_inode - search inode in the RB-tree of inodes. |
|
* @fsckd: FS checking information |
|
* @inum: inode number to search |
|
* |
|
* This is a helper function for 'check_leaf()' which searches inode @inum in |
|
* the RB-tree of inodes and returns an inode information pointer or %NULL if |
|
* the inode was not found. |
|
*/ |
|
static struct fsck_inode *search_inode(struct fsck_data *fsckd, ino_t inum) |
|
{ |
|
struct rb_node *p; |
|
struct fsck_inode *fscki; |
|
|
|
p = fsckd->inodes.rb_node; |
|
while (p) { |
|
fscki = rb_entry(p, struct fsck_inode, rb); |
|
if (inum < fscki->inum) |
|
p = p->rb_left; |
|
else if (inum > fscki->inum) |
|
p = p->rb_right; |
|
else |
|
return fscki; |
|
} |
|
return NULL; |
|
} |
|
|
|
/** |
|
* read_add_inode - read inode node and add it to RB-tree of inodes. |
|
* @c: UBIFS file-system description object |
|
* @fsckd: FS checking information |
|
* @inum: inode number to read |
|
* |
|
* This is a helper function for 'check_leaf()' which finds inode node @inum in |
|
* the index, reads it, and adds it to the RB-tree of inodes. Returns inode |
|
* information pointer in case of success and a negative error code in case of |
|
* failure. |
|
*/ |
|
static struct fsck_inode *read_add_inode(struct ubifs_info *c, |
|
struct fsck_data *fsckd, ino_t inum) |
|
{ |
|
int n, err; |
|
union ubifs_key key; |
|
struct ubifs_znode *znode; |
|
struct ubifs_zbranch *zbr; |
|
struct ubifs_ino_node *ino; |
|
struct fsck_inode *fscki; |
|
|
|
fscki = search_inode(fsckd, inum); |
|
if (fscki) |
|
return fscki; |
|
|
|
ino_key_init(c, &key, inum); |
|
err = ubifs_lookup_level0(c, &key, &znode, &n); |
|
if (!err) { |
|
ubifs_err(c, "inode %lu not found in index", (unsigned long)inum); |
|
return ERR_PTR(-ENOENT); |
|
} else if (err < 0) { |
|
ubifs_err(c, "error %d while looking up inode %lu", |
|
err, (unsigned long)inum); |
|
return ERR_PTR(err); |
|
} |
|
|
|
zbr = &znode->zbranch[n]; |
|
if (zbr->len < UBIFS_INO_NODE_SZ) { |
|
ubifs_err(c, "bad node %lu node length %d", |
|
(unsigned long)inum, zbr->len); |
|
return ERR_PTR(-EINVAL); |
|
} |
|
|
|
ino = kmalloc(zbr->len, GFP_NOFS); |
|
if (!ino) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
err = ubifs_tnc_read_node(c, zbr, ino); |
|
if (err) { |
|
ubifs_err(c, "cannot read inode node at LEB %d:%d, error %d", |
|
zbr->lnum, zbr->offs, err); |
|
kfree(ino); |
|
return ERR_PTR(err); |
|
} |
|
|
|
fscki = add_inode(c, fsckd, ino); |
|
kfree(ino); |
|
if (IS_ERR(fscki)) { |
|
ubifs_err(c, "error %ld while adding inode %lu node", |
|
PTR_ERR(fscki), (unsigned long)inum); |
|
return fscki; |
|
} |
|
|
|
return fscki; |
|
} |
|
|
|
/** |
|
* check_leaf - check leaf node. |
|
* @c: UBIFS file-system description object |
|
* @zbr: zbranch of the leaf node to check |
|
* @priv: FS checking information |
|
* |
|
* This is a helper function for 'dbg_check_filesystem()' which is called for |
|
* every single leaf node while walking the indexing tree. It checks that the |
|
* leaf node referred from the indexing tree exists, has correct CRC, and does |
|
* some other basic validation. This function is also responsible for building |
|
* an RB-tree of inodes - it adds all inodes into the RB-tree. It also |
|
* calculates reference count, size, etc for each inode in order to later |
|
* compare them to the information stored inside the inodes and detect possible |
|
* inconsistencies. Returns zero in case of success and a negative error code |
|
* in case of failure. |
|
*/ |
|
static int check_leaf(struct ubifs_info *c, struct ubifs_zbranch *zbr, |
|
void *priv) |
|
{ |
|
ino_t inum; |
|
void *node; |
|
struct ubifs_ch *ch; |
|
int err, type = key_type(c, &zbr->key); |
|
struct fsck_inode *fscki; |
|
|
|
if (zbr->len < UBIFS_CH_SZ) { |
|
ubifs_err(c, "bad leaf length %d (LEB %d:%d)", |
|
zbr->len, zbr->lnum, zbr->offs); |
|
return -EINVAL; |
|
} |
|
|
|
node = kmalloc(zbr->len, GFP_NOFS); |
|
if (!node) |
|
return -ENOMEM; |
|
|
|
err = ubifs_tnc_read_node(c, zbr, node); |
|
if (err) { |
|
ubifs_err(c, "cannot read leaf node at LEB %d:%d, error %d", |
|
zbr->lnum, zbr->offs, err); |
|
goto out_free; |
|
} |
|
|
|
/* If this is an inode node, add it to RB-tree of inodes */ |
|
if (type == UBIFS_INO_KEY) { |
|
fscki = add_inode(c, priv, node); |
|
if (IS_ERR(fscki)) { |
|
err = PTR_ERR(fscki); |
|
ubifs_err(c, "error %d while adding inode node", err); |
|
goto out_dump; |
|
} |
|
goto out; |
|
} |
|
|
|
if (type != UBIFS_DENT_KEY && type != UBIFS_XENT_KEY && |
|
type != UBIFS_DATA_KEY) { |
|
ubifs_err(c, "unexpected node type %d at LEB %d:%d", |
|
type, zbr->lnum, zbr->offs); |
|
err = -EINVAL; |
|
goto out_free; |
|
} |
|
|
|
ch = node; |
|
if (le64_to_cpu(ch->sqnum) > c->max_sqnum) { |
|
ubifs_err(c, "too high sequence number, max. is %llu", |
|
c->max_sqnum); |
|
err = -EINVAL; |
|
goto out_dump; |
|
} |
|
|
|
if (type == UBIFS_DATA_KEY) { |
|
long long blk_offs; |
|
struct ubifs_data_node *dn = node; |
|
|
|
ubifs_assert(c, zbr->len >= UBIFS_DATA_NODE_SZ); |
|
|
|
/* |
|
* Search the inode node this data node belongs to and insert |
|
* it to the RB-tree of inodes. |
|
*/ |
|
inum = key_inum_flash(c, &dn->key); |
|
fscki = read_add_inode(c, priv, inum); |
|
if (IS_ERR(fscki)) { |
|
err = PTR_ERR(fscki); |
|
ubifs_err(c, "error %d while processing data node and trying to find inode node %lu", |
|
err, (unsigned long)inum); |
|
goto out_dump; |
|
} |
|
|
|
/* Make sure the data node is within inode size */ |
|
blk_offs = key_block_flash(c, &dn->key); |
|
blk_offs <<= UBIFS_BLOCK_SHIFT; |
|
blk_offs += le32_to_cpu(dn->size); |
|
if (blk_offs > fscki->size) { |
|
ubifs_err(c, "data node at LEB %d:%d is not within inode size %lld", |
|
zbr->lnum, zbr->offs, fscki->size); |
|
err = -EINVAL; |
|
goto out_dump; |
|
} |
|
} else { |
|
int nlen; |
|
struct ubifs_dent_node *dent = node; |
|
struct fsck_inode *fscki1; |
|
|
|
ubifs_assert(c, zbr->len >= UBIFS_DENT_NODE_SZ); |
|
|
|
err = ubifs_validate_entry(c, dent); |
|
if (err) |
|
goto out_dump; |
|
|
|
/* |
|
* Search the inode node this entry refers to and the parent |
|
* inode node and insert them to the RB-tree of inodes. |
|
*/ |
|
inum = le64_to_cpu(dent->inum); |
|
fscki = read_add_inode(c, priv, inum); |
|
if (IS_ERR(fscki)) { |
|
err = PTR_ERR(fscki); |
|
ubifs_err(c, "error %d while processing entry node and trying to find inode node %lu", |
|
err, (unsigned long)inum); |
|
goto out_dump; |
|
} |
|
|
|
/* Count how many direntries or xentries refers this inode */ |
|
fscki->references += 1; |
|
|
|
inum = key_inum_flash(c, &dent->key); |
|
fscki1 = read_add_inode(c, priv, inum); |
|
if (IS_ERR(fscki1)) { |
|
err = PTR_ERR(fscki1); |
|
ubifs_err(c, "error %d while processing entry node and trying to find parent inode node %lu", |
|
err, (unsigned long)inum); |
|
goto out_dump; |
|
} |
|
|
|
nlen = le16_to_cpu(dent->nlen); |
|
if (type == UBIFS_XENT_KEY) { |
|
fscki1->calc_xcnt += 1; |
|
fscki1->calc_xsz += CALC_DENT_SIZE(nlen); |
|
fscki1->calc_xsz += CALC_XATTR_BYTES(fscki->size); |
|
fscki1->calc_xnms += nlen; |
|
} else { |
|
fscki1->calc_sz += CALC_DENT_SIZE(nlen); |
|
if (dent->type == UBIFS_ITYPE_DIR) |
|
fscki1->calc_cnt += 1; |
|
} |
|
} |
|
|
|
out: |
|
kfree(node); |
|
return 0; |
|
|
|
out_dump: |
|
ubifs_msg(c, "dump of node at LEB %d:%d", zbr->lnum, zbr->offs); |
|
ubifs_dump_node(c, node, zbr->len); |
|
out_free: |
|
kfree(node); |
|
return err; |
|
} |
|
|
|
/** |
|
* free_inodes - free RB-tree of inodes. |
|
* @fsckd: FS checking information |
|
*/ |
|
static void free_inodes(struct fsck_data *fsckd) |
|
{ |
|
struct fsck_inode *fscki, *n; |
|
|
|
rbtree_postorder_for_each_entry_safe(fscki, n, &fsckd->inodes, rb) |
|
kfree(fscki); |
|
} |
|
|
|
/** |
|
* check_inodes - checks all inodes. |
|
* @c: UBIFS file-system description object |
|
* @fsckd: FS checking information |
|
* |
|
* This is a helper function for 'dbg_check_filesystem()' which walks the |
|
* RB-tree of inodes after the index scan has been finished, and checks that |
|
* inode nlink, size, etc are correct. Returns zero if inodes are fine, |
|
* %-EINVAL if not, and a negative error code in case of failure. |
|
*/ |
|
static int check_inodes(struct ubifs_info *c, struct fsck_data *fsckd) |
|
{ |
|
int n, err; |
|
union ubifs_key key; |
|
struct ubifs_znode *znode; |
|
struct ubifs_zbranch *zbr; |
|
struct ubifs_ino_node *ino; |
|
struct fsck_inode *fscki; |
|
struct rb_node *this = rb_first(&fsckd->inodes); |
|
|
|
while (this) { |
|
fscki = rb_entry(this, struct fsck_inode, rb); |
|
this = rb_next(this); |
|
|
|
if (S_ISDIR(fscki->mode)) { |
|
/* |
|
* Directories have to have exactly one reference (they |
|
* cannot have hardlinks), although root inode is an |
|
* exception. |
|
*/ |
|
if (fscki->inum != UBIFS_ROOT_INO && |
|
fscki->references != 1) { |
|
ubifs_err(c, "directory inode %lu has %d direntries which refer it, but should be 1", |
|
(unsigned long)fscki->inum, |
|
fscki->references); |
|
goto out_dump; |
|
} |
|
if (fscki->inum == UBIFS_ROOT_INO && |
|
fscki->references != 0) { |
|
ubifs_err(c, "root inode %lu has non-zero (%d) direntries which refer it", |
|
(unsigned long)fscki->inum, |
|
fscki->references); |
|
goto out_dump; |
|
} |
|
if (fscki->calc_sz != fscki->size) { |
|
ubifs_err(c, "directory inode %lu size is %lld, but calculated size is %lld", |
|
(unsigned long)fscki->inum, |
|
fscki->size, fscki->calc_sz); |
|
goto out_dump; |
|
} |
|
if (fscki->calc_cnt != fscki->nlink) { |
|
ubifs_err(c, "directory inode %lu nlink is %d, but calculated nlink is %d", |
|
(unsigned long)fscki->inum, |
|
fscki->nlink, fscki->calc_cnt); |
|
goto out_dump; |
|
} |
|
} else { |
|
if (fscki->references != fscki->nlink) { |
|
ubifs_err(c, "inode %lu nlink is %d, but calculated nlink is %d", |
|
(unsigned long)fscki->inum, |
|
fscki->nlink, fscki->references); |
|
goto out_dump; |
|
} |
|
} |
|
if (fscki->xattr_sz != fscki->calc_xsz) { |
|
ubifs_err(c, "inode %lu has xattr size %u, but calculated size is %lld", |
|
(unsigned long)fscki->inum, fscki->xattr_sz, |
|
fscki->calc_xsz); |
|
goto out_dump; |
|
} |
|
if (fscki->xattr_cnt != fscki->calc_xcnt) { |
|
ubifs_err(c, "inode %lu has %u xattrs, but calculated count is %lld", |
|
(unsigned long)fscki->inum, |
|
fscki->xattr_cnt, fscki->calc_xcnt); |
|
goto out_dump; |
|
} |
|
if (fscki->xattr_nms != fscki->calc_xnms) { |
|
ubifs_err(c, "inode %lu has xattr names' size %u, but calculated names' size is %lld", |
|
(unsigned long)fscki->inum, fscki->xattr_nms, |
|
fscki->calc_xnms); |
|
goto out_dump; |
|
} |
|
} |
|
|
|
return 0; |
|
|
|
out_dump: |
|
/* Read the bad inode and dump it */ |
|
ino_key_init(c, &key, fscki->inum); |
|
err = ubifs_lookup_level0(c, &key, &znode, &n); |
|
if (!err) { |
|
ubifs_err(c, "inode %lu not found in index", |
|
(unsigned long)fscki->inum); |
|
return -ENOENT; |
|
} else if (err < 0) { |
|
ubifs_err(c, "error %d while looking up inode %lu", |
|
err, (unsigned long)fscki->inum); |
|
return err; |
|
} |
|
|
|
zbr = &znode->zbranch[n]; |
|
ino = kmalloc(zbr->len, GFP_NOFS); |
|
if (!ino) |
|
return -ENOMEM; |
|
|
|
err = ubifs_tnc_read_node(c, zbr, ino); |
|
if (err) { |
|
ubifs_err(c, "cannot read inode node at LEB %d:%d, error %d", |
|
zbr->lnum, zbr->offs, err); |
|
kfree(ino); |
|
return err; |
|
} |
|
|
|
ubifs_msg(c, "dump of the inode %lu sitting in LEB %d:%d", |
|
(unsigned long)fscki->inum, zbr->lnum, zbr->offs); |
|
ubifs_dump_node(c, ino, zbr->len); |
|
kfree(ino); |
|
return -EINVAL; |
|
} |
|
|
|
/** |
|
* dbg_check_filesystem - check the file-system. |
|
* @c: UBIFS file-system description object |
|
* |
|
* This function checks the file system, namely: |
|
* o makes sure that all leaf nodes exist and their CRCs are correct; |
|
* o makes sure inode nlink, size, xattr size/count are correct (for all |
|
* inodes). |
|
* |
|
* The function reads whole indexing tree and all nodes, so it is pretty |
|
* heavy-weight. Returns zero if the file-system is consistent, %-EINVAL if |
|
* not, and a negative error code in case of failure. |
|
*/ |
|
int dbg_check_filesystem(struct ubifs_info *c) |
|
{ |
|
int err; |
|
struct fsck_data fsckd; |
|
|
|
if (!dbg_is_chk_fs(c)) |
|
return 0; |
|
|
|
fsckd.inodes = RB_ROOT; |
|
err = dbg_walk_index(c, check_leaf, NULL, &fsckd); |
|
if (err) |
|
goto out_free; |
|
|
|
err = check_inodes(c, &fsckd); |
|
if (err) |
|
goto out_free; |
|
|
|
free_inodes(&fsckd); |
|
return 0; |
|
|
|
out_free: |
|
ubifs_err(c, "file-system check failed with error %d", err); |
|
dump_stack(); |
|
free_inodes(&fsckd); |
|
return err; |
|
} |
|
|
|
/** |
|
* dbg_check_data_nodes_order - check that list of data nodes is sorted. |
|
* @c: UBIFS file-system description object |
|
* @head: the list of nodes ('struct ubifs_scan_node' objects) |
|
* |
|
* This function returns zero if the list of data nodes is sorted correctly, |
|
* and %-EINVAL if not. |
|
*/ |
|
int dbg_check_data_nodes_order(struct ubifs_info *c, struct list_head *head) |
|
{ |
|
struct list_head *cur; |
|
struct ubifs_scan_node *sa, *sb; |
|
|
|
if (!dbg_is_chk_gen(c)) |
|
return 0; |
|
|
|
for (cur = head->next; cur->next != head; cur = cur->next) { |
|
ino_t inuma, inumb; |
|
uint32_t blka, blkb; |
|
|
|
cond_resched(); |
|
sa = container_of(cur, struct ubifs_scan_node, list); |
|
sb = container_of(cur->next, struct ubifs_scan_node, list); |
|
|
|
if (sa->type != UBIFS_DATA_NODE) { |
|
ubifs_err(c, "bad node type %d", sa->type); |
|
ubifs_dump_node(c, sa->node, c->leb_size - sa->offs); |
|
return -EINVAL; |
|
} |
|
if (sb->type != UBIFS_DATA_NODE) { |
|
ubifs_err(c, "bad node type %d", sb->type); |
|
ubifs_dump_node(c, sb->node, c->leb_size - sb->offs); |
|
return -EINVAL; |
|
} |
|
|
|
inuma = key_inum(c, &sa->key); |
|
inumb = key_inum(c, &sb->key); |
|
|
|
if (inuma < inumb) |
|
continue; |
|
if (inuma > inumb) { |
|
ubifs_err(c, "larger inum %lu goes before inum %lu", |
|
(unsigned long)inuma, (unsigned long)inumb); |
|
goto error_dump; |
|
} |
|
|
|
blka = key_block(c, &sa->key); |
|
blkb = key_block(c, &sb->key); |
|
|
|
if (blka > blkb) { |
|
ubifs_err(c, "larger block %u goes before %u", blka, blkb); |
|
goto error_dump; |
|
} |
|
if (blka == blkb) { |
|
ubifs_err(c, "two data nodes for the same block"); |
|
goto error_dump; |
|
} |
|
} |
|
|
|
return 0; |
|
|
|
error_dump: |
|
ubifs_dump_node(c, sa->node, c->leb_size - sa->offs); |
|
ubifs_dump_node(c, sb->node, c->leb_size - sb->offs); |
|
return -EINVAL; |
|
} |
|
|
|
/** |
|
* dbg_check_nondata_nodes_order - check that list of data nodes is sorted. |
|
* @c: UBIFS file-system description object |
|
* @head: the list of nodes ('struct ubifs_scan_node' objects) |
|
* |
|
* This function returns zero if the list of non-data nodes is sorted correctly, |
|
* and %-EINVAL if not. |
|
*/ |
|
int dbg_check_nondata_nodes_order(struct ubifs_info *c, struct list_head *head) |
|
{ |
|
struct list_head *cur; |
|
struct ubifs_scan_node *sa, *sb; |
|
|
|
if (!dbg_is_chk_gen(c)) |
|
return 0; |
|
|
|
for (cur = head->next; cur->next != head; cur = cur->next) { |
|
ino_t inuma, inumb; |
|
uint32_t hasha, hashb; |
|
|
|
cond_resched(); |
|
sa = container_of(cur, struct ubifs_scan_node, list); |
|
sb = container_of(cur->next, struct ubifs_scan_node, list); |
|
|
|
if (sa->type != UBIFS_INO_NODE && sa->type != UBIFS_DENT_NODE && |
|
sa->type != UBIFS_XENT_NODE) { |
|
ubifs_err(c, "bad node type %d", sa->type); |
|
ubifs_dump_node(c, sa->node, c->leb_size - sa->offs); |
|
return -EINVAL; |
|
} |
|
if (sb->type != UBIFS_INO_NODE && sb->type != UBIFS_DENT_NODE && |
|
sb->type != UBIFS_XENT_NODE) { |
|
ubifs_err(c, "bad node type %d", sb->type); |
|
ubifs_dump_node(c, sb->node, c->leb_size - sb->offs); |
|
return -EINVAL; |
|
} |
|
|
|
if (sa->type != UBIFS_INO_NODE && sb->type == UBIFS_INO_NODE) { |
|
ubifs_err(c, "non-inode node goes before inode node"); |
|
goto error_dump; |
|
} |
|
|
|
if (sa->type == UBIFS_INO_NODE && sb->type != UBIFS_INO_NODE) |
|
continue; |
|
|
|
if (sa->type == UBIFS_INO_NODE && sb->type == UBIFS_INO_NODE) { |
|
/* Inode nodes are sorted in descending size order */ |
|
if (sa->len < sb->len) { |
|
ubifs_err(c, "smaller inode node goes first"); |
|
goto error_dump; |
|
} |
|
continue; |
|
} |
|
|
|
/* |
|
* This is either a dentry or xentry, which should be sorted in |
|
* ascending (parent ino, hash) order. |
|
*/ |
|
inuma = key_inum(c, &sa->key); |
|
inumb = key_inum(c, &sb->key); |
|
|
|
if (inuma < inumb) |
|
continue; |
|
if (inuma > inumb) { |
|
ubifs_err(c, "larger inum %lu goes before inum %lu", |
|
(unsigned long)inuma, (unsigned long)inumb); |
|
goto error_dump; |
|
} |
|
|
|
hasha = key_block(c, &sa->key); |
|
hashb = key_block(c, &sb->key); |
|
|
|
if (hasha > hashb) { |
|
ubifs_err(c, "larger hash %u goes before %u", |
|
hasha, hashb); |
|
goto error_dump; |
|
} |
|
} |
|
|
|
return 0; |
|
|
|
error_dump: |
|
ubifs_msg(c, "dumping first node"); |
|
ubifs_dump_node(c, sa->node, c->leb_size - sa->offs); |
|
ubifs_msg(c, "dumping second node"); |
|
ubifs_dump_node(c, sb->node, c->leb_size - sb->offs); |
|
return -EINVAL; |
|
} |
|
|
|
static inline int chance(unsigned int n, unsigned int out_of) |
|
{ |
|
return !!((prandom_u32() % out_of) + 1 <= n); |
|
|
|
} |
|
|
|
static int power_cut_emulated(struct ubifs_info *c, int lnum, int write) |
|
{ |
|
struct ubifs_debug_info *d = c->dbg; |
|
|
|
ubifs_assert(c, dbg_is_tst_rcvry(c)); |
|
|
|
if (!d->pc_cnt) { |
|
/* First call - decide delay to the power cut */ |
|
if (chance(1, 2)) { |
|
unsigned long delay; |
|
|
|
if (chance(1, 2)) { |
|
d->pc_delay = 1; |
|
/* Fail within 1 minute */ |
|
delay = prandom_u32() % 60000; |
|
d->pc_timeout = jiffies; |
|
d->pc_timeout += msecs_to_jiffies(delay); |
|
ubifs_warn(c, "failing after %lums", delay); |
|
} else { |
|
d->pc_delay = 2; |
|
delay = prandom_u32() % 10000; |
|
/* Fail within 10000 operations */ |
|
d->pc_cnt_max = delay; |
|
ubifs_warn(c, "failing after %lu calls", delay); |
|
} |
|
} |
|
|
|
d->pc_cnt += 1; |
|
} |
|
|
|
/* Determine if failure delay has expired */ |
|
if (d->pc_delay == 1 && time_before(jiffies, d->pc_timeout)) |
|
return 0; |
|
if (d->pc_delay == 2 && d->pc_cnt++ < d->pc_cnt_max) |
|
return 0; |
|
|
|
if (lnum == UBIFS_SB_LNUM) { |
|
if (write && chance(1, 2)) |
|
return 0; |
|
if (chance(19, 20)) |
|
return 0; |
|
ubifs_warn(c, "failing in super block LEB %d", lnum); |
|
} else if (lnum == UBIFS_MST_LNUM || lnum == UBIFS_MST_LNUM + 1) { |
|
if (chance(19, 20)) |
|
return 0; |
|
ubifs_warn(c, "failing in master LEB %d", lnum); |
|
} else if (lnum >= UBIFS_LOG_LNUM && lnum <= c->log_last) { |
|
if (write && chance(99, 100)) |
|
return 0; |
|
if (chance(399, 400)) |
|
return 0; |
|
ubifs_warn(c, "failing in log LEB %d", lnum); |
|
} else if (lnum >= c->lpt_first && lnum <= c->lpt_last) { |
|
if (write && chance(7, 8)) |
|
return 0; |
|
if (chance(19, 20)) |
|
return 0; |
|
ubifs_warn(c, "failing in LPT LEB %d", lnum); |
|
} else if (lnum >= c->orph_first && lnum <= c->orph_last) { |
|
if (write && chance(1, 2)) |
|
return 0; |
|
if (chance(9, 10)) |
|
return 0; |
|
ubifs_warn(c, "failing in orphan LEB %d", lnum); |
|
} else if (lnum == c->ihead_lnum) { |
|
if (chance(99, 100)) |
|
return 0; |
|
ubifs_warn(c, "failing in index head LEB %d", lnum); |
|
} else if (c->jheads && lnum == c->jheads[GCHD].wbuf.lnum) { |
|
if (chance(9, 10)) |
|
return 0; |
|
ubifs_warn(c, "failing in GC head LEB %d", lnum); |
|
} else if (write && !RB_EMPTY_ROOT(&c->buds) && |
|
!ubifs_search_bud(c, lnum)) { |
|
if (chance(19, 20)) |
|
return 0; |
|
ubifs_warn(c, "failing in non-bud LEB %d", lnum); |
|
} else if (c->cmt_state == COMMIT_RUNNING_BACKGROUND || |
|
c->cmt_state == COMMIT_RUNNING_REQUIRED) { |
|
if (chance(999, 1000)) |
|
return 0; |
|
ubifs_warn(c, "failing in bud LEB %d commit running", lnum); |
|
} else { |
|
if (chance(9999, 10000)) |
|
return 0; |
|
ubifs_warn(c, "failing in bud LEB %d commit not running", lnum); |
|
} |
|
|
|
d->pc_happened = 1; |
|
ubifs_warn(c, "========== Power cut emulated =========="); |
|
dump_stack(); |
|
return 1; |
|
} |
|
|
|
static int corrupt_data(const struct ubifs_info *c, const void *buf, |
|
unsigned int len) |
|
{ |
|
unsigned int from, to, ffs = chance(1, 2); |
|
unsigned char *p = (void *)buf; |
|
|
|
from = prandom_u32() % len; |
|
/* Corruption span max to end of write unit */ |
|
to = min(len, ALIGN(from + 1, c->max_write_size)); |
|
|
|
ubifs_warn(c, "filled bytes %u-%u with %s", from, to - 1, |
|
ffs ? "0xFFs" : "random data"); |
|
|
|
if (ffs) |
|
memset(p + from, 0xFF, to - from); |
|
else |
|
prandom_bytes(p + from, to - from); |
|
|
|
return to; |
|
} |
|
|
|
int dbg_leb_write(struct ubifs_info *c, int lnum, const void *buf, |
|
int offs, int len) |
|
{ |
|
int err, failing; |
|
|
|
if (dbg_is_power_cut(c)) |
|
return -EROFS; |
|
|
|
failing = power_cut_emulated(c, lnum, 1); |
|
if (failing) { |
|
len = corrupt_data(c, buf, len); |
|
ubifs_warn(c, "actually write %d bytes to LEB %d:%d (the buffer was corrupted)", |
|
len, lnum, offs); |
|
} |
|
err = ubi_leb_write(c->ubi, lnum, buf, offs, len); |
|
if (err) |
|
return err; |
|
if (failing) |
|
return -EROFS; |
|
return 0; |
|
} |
|
|
|
int dbg_leb_change(struct ubifs_info *c, int lnum, const void *buf, |
|
int len) |
|
{ |
|
int err; |
|
|
|
if (dbg_is_power_cut(c)) |
|
return -EROFS; |
|
if (power_cut_emulated(c, lnum, 1)) |
|
return -EROFS; |
|
err = ubi_leb_change(c->ubi, lnum, buf, len); |
|
if (err) |
|
return err; |
|
if (power_cut_emulated(c, lnum, 1)) |
|
return -EROFS; |
|
return 0; |
|
} |
|
|
|
int dbg_leb_unmap(struct ubifs_info *c, int lnum) |
|
{ |
|
int err; |
|
|
|
if (dbg_is_power_cut(c)) |
|
return -EROFS; |
|
if (power_cut_emulated(c, lnum, 0)) |
|
return -EROFS; |
|
err = ubi_leb_unmap(c->ubi, lnum); |
|
if (err) |
|
return err; |
|
if (power_cut_emulated(c, lnum, 0)) |
|
return -EROFS; |
|
return 0; |
|
} |
|
|
|
int dbg_leb_map(struct ubifs_info *c, int lnum) |
|
{ |
|
int err; |
|
|
|
if (dbg_is_power_cut(c)) |
|
return -EROFS; |
|
if (power_cut_emulated(c, lnum, 0)) |
|
return -EROFS; |
|
err = ubi_leb_map(c->ubi, lnum); |
|
if (err) |
|
return err; |
|
if (power_cut_emulated(c, lnum, 0)) |
|
return -EROFS; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Root directory for UBIFS stuff in debugfs. Contains sub-directories which |
|
* contain the stuff specific to particular file-system mounts. |
|
*/ |
|
static struct dentry *dfs_rootdir; |
|
|
|
static int dfs_file_open(struct inode *inode, struct file *file) |
|
{ |
|
file->private_data = inode->i_private; |
|
return nonseekable_open(inode, file); |
|
} |
|
|
|
/** |
|
* provide_user_output - provide output to the user reading a debugfs file. |
|
* @val: boolean value for the answer |
|
* @u: the buffer to store the answer at |
|
* @count: size of the buffer |
|
* @ppos: position in the @u output buffer |
|
* |
|
* This is a simple helper function which stores @val boolean value in the user |
|
* buffer when the user reads one of UBIFS debugfs files. Returns amount of |
|
* bytes written to @u in case of success and a negative error code in case of |
|
* failure. |
|
*/ |
|
static int provide_user_output(int val, char __user *u, size_t count, |
|
loff_t *ppos) |
|
{ |
|
char buf[3]; |
|
|
|
if (val) |
|
buf[0] = '1'; |
|
else |
|
buf[0] = '0'; |
|
buf[1] = '\n'; |
|
buf[2] = 0x00; |
|
|
|
return simple_read_from_buffer(u, count, ppos, buf, 2); |
|
} |
|
|
|
static ssize_t dfs_file_read(struct file *file, char __user *u, size_t count, |
|
loff_t *ppos) |
|
{ |
|
struct dentry *dent = file->f_path.dentry; |
|
struct ubifs_info *c = file->private_data; |
|
struct ubifs_debug_info *d = c->dbg; |
|
int val; |
|
|
|
if (dent == d->dfs_chk_gen) |
|
val = d->chk_gen; |
|
else if (dent == d->dfs_chk_index) |
|
val = d->chk_index; |
|
else if (dent == d->dfs_chk_orph) |
|
val = d->chk_orph; |
|
else if (dent == d->dfs_chk_lprops) |
|
val = d->chk_lprops; |
|
else if (dent == d->dfs_chk_fs) |
|
val = d->chk_fs; |
|
else if (dent == d->dfs_tst_rcvry) |
|
val = d->tst_rcvry; |
|
else if (dent == d->dfs_ro_error) |
|
val = c->ro_error; |
|
else |
|
return -EINVAL; |
|
|
|
return provide_user_output(val, u, count, ppos); |
|
} |
|
|
|
/** |
|
* interpret_user_input - interpret user debugfs file input. |
|
* @u: user-provided buffer with the input |
|
* @count: buffer size |
|
* |
|
* This is a helper function which interpret user input to a boolean UBIFS |
|
* debugfs file. Returns %0 or %1 in case of success and a negative error code |
|
* in case of failure. |
|
*/ |
|
static int interpret_user_input(const char __user *u, size_t count) |
|
{ |
|
size_t buf_size; |
|
char buf[8]; |
|
|
|
buf_size = min_t(size_t, count, (sizeof(buf) - 1)); |
|
if (copy_from_user(buf, u, buf_size)) |
|
return -EFAULT; |
|
|
|
if (buf[0] == '1') |
|
return 1; |
|
else if (buf[0] == '0') |
|
return 0; |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static ssize_t dfs_file_write(struct file *file, const char __user *u, |
|
size_t count, loff_t *ppos) |
|
{ |
|
struct ubifs_info *c = file->private_data; |
|
struct ubifs_debug_info *d = c->dbg; |
|
struct dentry *dent = file->f_path.dentry; |
|
int val; |
|
|
|
if (file->f_path.dentry == d->dfs_dump_lprops) { |
|
ubifs_dump_lprops(c); |
|
return count; |
|
} |
|
if (file->f_path.dentry == d->dfs_dump_budg) { |
|
ubifs_dump_budg(c, &c->bi); |
|
return count; |
|
} |
|
if (file->f_path.dentry == d->dfs_dump_tnc) { |
|
mutex_lock(&c->tnc_mutex); |
|
ubifs_dump_tnc(c); |
|
mutex_unlock(&c->tnc_mutex); |
|
return count; |
|
} |
|
|
|
val = interpret_user_input(u, count); |
|
if (val < 0) |
|
return val; |
|
|
|
if (dent == d->dfs_chk_gen) |
|
d->chk_gen = val; |
|
else if (dent == d->dfs_chk_index) |
|
d->chk_index = val; |
|
else if (dent == d->dfs_chk_orph) |
|
d->chk_orph = val; |
|
else if (dent == d->dfs_chk_lprops) |
|
d->chk_lprops = val; |
|
else if (dent == d->dfs_chk_fs) |
|
d->chk_fs = val; |
|
else if (dent == d->dfs_tst_rcvry) |
|
d->tst_rcvry = val; |
|
else if (dent == d->dfs_ro_error) |
|
c->ro_error = !!val; |
|
else |
|
return -EINVAL; |
|
|
|
return count; |
|
} |
|
|
|
static const struct file_operations dfs_fops = { |
|
.open = dfs_file_open, |
|
.read = dfs_file_read, |
|
.write = dfs_file_write, |
|
.owner = THIS_MODULE, |
|
.llseek = no_llseek, |
|
}; |
|
|
|
/** |
|
* dbg_debugfs_init_fs - initialize debugfs for UBIFS instance. |
|
* @c: UBIFS file-system description object |
|
* |
|
* This function creates all debugfs files for this instance of UBIFS. |
|
* |
|
* Note, the only reason we have not merged this function with the |
|
* 'ubifs_debugging_init()' function is because it is better to initialize |
|
* debugfs interfaces at the very end of the mount process, and remove them at |
|
* the very beginning of the mount process. |
|
*/ |
|
void dbg_debugfs_init_fs(struct ubifs_info *c) |
|
{ |
|
int n; |
|
const char *fname; |
|
struct ubifs_debug_info *d = c->dbg; |
|
|
|
n = snprintf(d->dfs_dir_name, UBIFS_DFS_DIR_LEN + 1, UBIFS_DFS_DIR_NAME, |
|
c->vi.ubi_num, c->vi.vol_id); |
|
if (n > UBIFS_DFS_DIR_LEN) { |
|
/* The array size is too small */ |
|
return; |
|
} |
|
|
|
fname = d->dfs_dir_name; |
|
d->dfs_dir = debugfs_create_dir(fname, dfs_rootdir); |
|
|
|
fname = "dump_lprops"; |
|
d->dfs_dump_lprops = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, |
|
&dfs_fops); |
|
|
|
fname = "dump_budg"; |
|
d->dfs_dump_budg = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, |
|
&dfs_fops); |
|
|
|
fname = "dump_tnc"; |
|
d->dfs_dump_tnc = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, |
|
&dfs_fops); |
|
|
|
fname = "chk_general"; |
|
d->dfs_chk_gen = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
d->dfs_dir, c, &dfs_fops); |
|
|
|
fname = "chk_index"; |
|
d->dfs_chk_index = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
d->dfs_dir, c, &dfs_fops); |
|
|
|
fname = "chk_orphans"; |
|
d->dfs_chk_orph = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
d->dfs_dir, c, &dfs_fops); |
|
|
|
fname = "chk_lprops"; |
|
d->dfs_chk_lprops = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
d->dfs_dir, c, &dfs_fops); |
|
|
|
fname = "chk_fs"; |
|
d->dfs_chk_fs = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
d->dfs_dir, c, &dfs_fops); |
|
|
|
fname = "tst_recovery"; |
|
d->dfs_tst_rcvry = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
d->dfs_dir, c, &dfs_fops); |
|
|
|
fname = "ro_error"; |
|
d->dfs_ro_error = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
d->dfs_dir, c, &dfs_fops); |
|
} |
|
|
|
/** |
|
* dbg_debugfs_exit_fs - remove all debugfs files. |
|
* @c: UBIFS file-system description object |
|
*/ |
|
void dbg_debugfs_exit_fs(struct ubifs_info *c) |
|
{ |
|
debugfs_remove_recursive(c->dbg->dfs_dir); |
|
} |
|
|
|
struct ubifs_global_debug_info ubifs_dbg; |
|
|
|
static struct dentry *dfs_chk_gen; |
|
static struct dentry *dfs_chk_index; |
|
static struct dentry *dfs_chk_orph; |
|
static struct dentry *dfs_chk_lprops; |
|
static struct dentry *dfs_chk_fs; |
|
static struct dentry *dfs_tst_rcvry; |
|
|
|
static ssize_t dfs_global_file_read(struct file *file, char __user *u, |
|
size_t count, loff_t *ppos) |
|
{ |
|
struct dentry *dent = file->f_path.dentry; |
|
int val; |
|
|
|
if (dent == dfs_chk_gen) |
|
val = ubifs_dbg.chk_gen; |
|
else if (dent == dfs_chk_index) |
|
val = ubifs_dbg.chk_index; |
|
else if (dent == dfs_chk_orph) |
|
val = ubifs_dbg.chk_orph; |
|
else if (dent == dfs_chk_lprops) |
|
val = ubifs_dbg.chk_lprops; |
|
else if (dent == dfs_chk_fs) |
|
val = ubifs_dbg.chk_fs; |
|
else if (dent == dfs_tst_rcvry) |
|
val = ubifs_dbg.tst_rcvry; |
|
else |
|
return -EINVAL; |
|
|
|
return provide_user_output(val, u, count, ppos); |
|
} |
|
|
|
static ssize_t dfs_global_file_write(struct file *file, const char __user *u, |
|
size_t count, loff_t *ppos) |
|
{ |
|
struct dentry *dent = file->f_path.dentry; |
|
int val; |
|
|
|
val = interpret_user_input(u, count); |
|
if (val < 0) |
|
return val; |
|
|
|
if (dent == dfs_chk_gen) |
|
ubifs_dbg.chk_gen = val; |
|
else if (dent == dfs_chk_index) |
|
ubifs_dbg.chk_index = val; |
|
else if (dent == dfs_chk_orph) |
|
ubifs_dbg.chk_orph = val; |
|
else if (dent == dfs_chk_lprops) |
|
ubifs_dbg.chk_lprops = val; |
|
else if (dent == dfs_chk_fs) |
|
ubifs_dbg.chk_fs = val; |
|
else if (dent == dfs_tst_rcvry) |
|
ubifs_dbg.tst_rcvry = val; |
|
else |
|
return -EINVAL; |
|
|
|
return count; |
|
} |
|
|
|
static const struct file_operations dfs_global_fops = { |
|
.read = dfs_global_file_read, |
|
.write = dfs_global_file_write, |
|
.owner = THIS_MODULE, |
|
.llseek = no_llseek, |
|
}; |
|
|
|
/** |
|
* dbg_debugfs_init - initialize debugfs file-system. |
|
* |
|
* UBIFS uses debugfs file-system to expose various debugging knobs to |
|
* user-space. This function creates "ubifs" directory in the debugfs |
|
* file-system. |
|
*/ |
|
void dbg_debugfs_init(void) |
|
{ |
|
const char *fname; |
|
|
|
fname = "ubifs"; |
|
dfs_rootdir = debugfs_create_dir(fname, NULL); |
|
|
|
fname = "chk_general"; |
|
dfs_chk_gen = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, |
|
NULL, &dfs_global_fops); |
|
|
|
fname = "chk_index"; |
|
dfs_chk_index = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
dfs_rootdir, NULL, &dfs_global_fops); |
|
|
|
fname = "chk_orphans"; |
|
dfs_chk_orph = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
dfs_rootdir, NULL, &dfs_global_fops); |
|
|
|
fname = "chk_lprops"; |
|
dfs_chk_lprops = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
dfs_rootdir, NULL, &dfs_global_fops); |
|
|
|
fname = "chk_fs"; |
|
dfs_chk_fs = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, |
|
NULL, &dfs_global_fops); |
|
|
|
fname = "tst_recovery"; |
|
dfs_tst_rcvry = debugfs_create_file(fname, S_IRUSR | S_IWUSR, |
|
dfs_rootdir, NULL, &dfs_global_fops); |
|
} |
|
|
|
/** |
|
* dbg_debugfs_exit - remove the "ubifs" directory from debugfs file-system. |
|
*/ |
|
void dbg_debugfs_exit(void) |
|
{ |
|
debugfs_remove_recursive(dfs_rootdir); |
|
} |
|
|
|
void ubifs_assert_failed(struct ubifs_info *c, const char *expr, |
|
const char *file, int line) |
|
{ |
|
ubifs_err(c, "UBIFS assert failed: %s, in %s:%u", expr, file, line); |
|
|
|
switch (c->assert_action) { |
|
case ASSACT_PANIC: |
|
BUG(); |
|
break; |
|
|
|
case ASSACT_RO: |
|
ubifs_ro_mode(c, -EINVAL); |
|
break; |
|
|
|
case ASSACT_REPORT: |
|
default: |
|
dump_stack(); |
|
break; |
|
|
|
} |
|
} |
|
|
|
/** |
|
* ubifs_debugging_init - initialize UBIFS debugging. |
|
* @c: UBIFS file-system description object |
|
* |
|
* This function initializes debugging-related data for the file system. |
|
* Returns zero in case of success and a negative error code in case of |
|
* failure. |
|
*/ |
|
int ubifs_debugging_init(struct ubifs_info *c) |
|
{ |
|
c->dbg = kzalloc(sizeof(struct ubifs_debug_info), GFP_KERNEL); |
|
if (!c->dbg) |
|
return -ENOMEM; |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* ubifs_debugging_exit - free debugging data. |
|
* @c: UBIFS file-system description object |
|
*/ |
|
void ubifs_debugging_exit(struct ubifs_info *c) |
|
{ |
|
kfree(c->dbg); |
|
}
|
|
|