*
* Copyright (C) 2006-2008 Nokia Corporation
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * SPDX-License-Identifier: GPL-2.0+
*
* Authors: Artem Bityutskiy (Битюцкий Артём)
* Adrian Hunter
* various local functions of those subsystems.
*/
-#define UBIFS_DBG_PRESERVE_UBI
-
+#define __UBOOT__
+#ifndef __UBOOT__
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/math64.h>
+#include <linux/uaccess.h>
+#include <linux/random.h>
+#else
+#include <linux/compat.h>
+#include <linux/err.h>
+#endif
#include "ubifs.h"
-#ifdef CONFIG_UBIFS_FS_DEBUG
-
-DEFINE_SPINLOCK(dbg_lock);
+#ifndef __UBOOT__
+static DEFINE_SPINLOCK(dbg_lock);
+#endif
-static char dbg_key_buf0[128];
-static char dbg_key_buf1[128];
-
-unsigned int ubifs_msg_flags = UBIFS_MSG_FLAGS_DEFAULT;
-unsigned int ubifs_chk_flags = UBIFS_CHK_FLAGS_DEFAULT;
-unsigned int ubifs_tst_flags;
-
-module_param_named(debug_msgs, ubifs_msg_flags, uint, S_IRUGO | S_IWUSR);
-module_param_named(debug_chks, ubifs_chk_flags, uint, S_IRUGO | S_IWUSR);
-module_param_named(debug_tsts, ubifs_tst_flags, uint, S_IRUGO | S_IWUSR);
+static const char *get_key_fmt(int fmt)
+{
+ switch (fmt) {
+ case UBIFS_SIMPLE_KEY_FMT:
+ return "simple";
+ default:
+ return "unknown/invalid format";
+ }
+}
-MODULE_PARM_DESC(debug_msgs, "Debug message type flags");
-MODULE_PARM_DESC(debug_chks, "Debug check flags");
-MODULE_PARM_DESC(debug_tsts, "Debug special test flags");
+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)
{
}
}
-static void sprintf_key(const struct ubifs_info *c, const union ubifs_key *key,
- char *buffer)
+#ifndef __UBOOT__
+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";
+ }
+}
+#endif
+
+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:
- sprintf(p, "(%lu, %s)", (unsigned long)key_inum(c, key),
- get_key_type(type));
+ 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:
- sprintf(p, "(%lu, %s, %#08x)",
- (unsigned long)key_inum(c, key),
- get_key_type(type), key_hash(c, 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:
- sprintf(p, "(%lu, %s, %u)",
- (unsigned long)key_inum(c, key),
- get_key_type(type), key_block(c, 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:
- sprintf(p, "(%lu, %s)",
- (unsigned long)key_inum(c, key),
- get_key_type(type));
+ len -= snprintf(p, len, "(%lu, %s)",
+ (unsigned long)key_inum(c, key),
+ get_key_type(type));
break;
default:
- sprintf(p, "(bad key type: %#08x, %#08x)",
- key->u32[0], key->u32[1]);
+ len -= snprintf(p, len, "(bad key type: %#08x, %#08x)",
+ key->u32[0], key->u32[1]);
}
} else
- sprintf(p, "bad key format %d", c->key_fmt);
+ len -= snprintf(p, len, "bad key format %d", c->key_fmt);
+ ubifs_assert(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";
+ 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)
+{
+#ifndef __UBOOT__
+ const struct ubifs_inode *ui = ubifs_inode(inode);
+ struct qstr nm = { .name = NULL };
+ 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->xattr);
+ 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(!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: %s (%s)\n",
+ count++, dent->name, get_dent_type(dent->type));
+
+ nm.name = dent->name;
+ nm.len = le16_to_cpu(dent->nlen);
+ kfree(pdent);
+ pdent = dent;
+ key_read(c, &dent->key, &key);
+ }
+ kfree(pdent);
+#endif
+}
+
+void ubifs_dump_node(const struct ubifs_info *c, const void *node)
+{
+ int i, n;
+ 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;
+ }
+
+ spin_lock(&dbg_lock);
+ dump_ch(node);
+
+ switch (ch->node_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("\t big_lpt %u\n",
+ !!(sup_flags & UBIFS_FLG_BIGLPT));
+ pr_err("\t space_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)
+ pr_err("(bad name length, not printing, bad or corrupted node)");
+ else {
+ for (i = 0; i < nlen && dent->name[i]; i++)
+ pr_cont("%c", dent->name[i]);
+ }
+ pr_cont("\n");
+
+ break;
+ }
+ case UBIFS_DATA_NODE:
+ {
+ const struct ubifs_data_node *dn = node;
+ int dlen = le32_to_cpu(ch->len) - UBIFS_DATA_NODE_SZ;
+
+ 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 %d\n", dlen);
+ pr_err("\tdata:\n");
+ print_hex_dump(KERN_ERR, "\t", DUMP_PREFIX_OFFSET, 32, 1,
+ (void *)&dn->data, dlen, 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;
+
+ n = le16_to_cpu(idx->child_cnt);
+ pr_err("\tchild_cnt %d\n", n);
+ pr_err("\tlevel %d\n", (int)le16_to_cpu(idx->level));
+ pr_err("\tBranches:\n");
+
+ for (i = 0; i < n && i < c->fanout - 1; 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 = (le32_to_cpu(ch->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;
+ }
+ default:
+ pr_err("node type %d was not recognized\n",
+ (int)ch->node_type);
+ }
+ 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);
+}
+
+#ifndef __UBOOT__
+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);
+}
+#else
+void ubifs_dump_budg(struct ubifs_info *c, const struct ubifs_budg_info *bi)
+{
+}
+#endif
+
+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("cannot read lprops for LEB %d", lnum);
+
+ ubifs_dump_lprop(c, &lp);
+ }
+ pr_err("(pid %d) finish dumping LEB properties\n", current->pid);
}
-const char *dbg_key_str0(const struct ubifs_info *c, const union ubifs_key *key)
+void ubifs_dump_lpt_info(struct ubifs_info *c)
{
- /* dbg_lock must be held */
- sprintf_key(c, key, dbg_key_buf0);
- return dbg_key_buf0;
+ 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: %d\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_sleb(const struct ubifs_info *c,
+ const struct ubifs_scan_leb *sleb, int offs)
+{
+ struct ubifs_scan_node *snod;
+
+ pr_err("(pid %d) start dumping scanned data from LEB %d:%d\n",
+ current->pid, sleb->lnum, offs);
+
+ list_for_each_entry(snod, &sleb->nodes, list) {
+ cond_resched();
+ pr_err("Dumping node at LEB %d:%d len %d\n",
+ sleb->lnum, snod->offs, snod->len);
+ ubifs_dump_node(c, snod->node);
+ }
+}
+
+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, PAGE_KERNEL);
+ if (!buf) {
+ ubifs_err("cannot allocate memory for dumping LEB %d", lnum);
+ return;
+ }
+
+ sleb = ubifs_scan(c, lnum, 0, buf, 0);
+ if (IS_ERR(sleb)) {
+ ubifs_err("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);
+ }
+
+ 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->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->zroot.znode, znode);
+ }
+ pr_err("(pid %d) finish dumping TNC tree\n", current->pid);
}
-const char *dbg_key_str1(const struct ubifs_info *c, const union ubifs_key *key)
+static int dump_znode(struct ubifs_info *c, struct ubifs_znode *znode,
+ void *priv)
{
- /* dbg_lock must be held */
- sprintf_key(c, key, dbg_key_buf1);
- return dbg_key_buf1;
+ ubifs_dump_znode(c, znode);
+ return 0;
}
/**
- * ubifs_debugging_init - initialize UBIFS debugging.
+ * ubifs_dump_index - dump the on-flash index.
* @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.
+ * 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.
*/
-int ubifs_debugging_init(struct ubifs_info *c)
+void ubifs_dump_index(struct ubifs_info *c)
{
- c->dbg = kzalloc(sizeof(struct ubifs_debug_info), GFP_KERNEL);
- if (!c->dbg)
- return -ENOMEM;
+ dbg_walk_index(c, NULL, dump_znode, NULL);
+}
+
+#ifndef __UBOOT__
+/**
+ * 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 it 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;
- c->dbg->buf = vmalloc(c->leb_size);
- if (!c->dbg->buf)
+ 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("free space changed from %lld to %lld",
+ d->saved_free, free);
goto out;
+ }
return 0;
out:
- kfree(c->dbg);
- return -ENOMEM;
+ ubifs_msg("saved lprops statistics dump");
+ ubifs_dump_lstats(&d->saved_lst);
+ ubifs_msg("saved budgeting info dump");
+ ubifs_dump_budg(c, &d->saved_bi);
+ ubifs_msg("saved idx_gc_cnt %d", d->saved_idx_gc_cnt);
+ ubifs_msg("current lprops statistics dump");
+ ubifs_get_lp_stats(c, &lst);
+ ubifs_dump_lstats(&lst);
+ ubifs_msg("current budgeting info dump");
+ ubifs_dump_budg(c, &c->bi);
+ dump_stack();
+ return -EINVAL;
}
/**
- * ubifs_debugging_exit - free debugging data.
+ * 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.
*/
-void ubifs_debugging_exit(struct ubifs_info *c)
+int dbg_check_synced_i_size(const struct ubifs_info *c, struct inode *inode)
{
- vfree(c->dbg->buf);
- kfree(c->dbg);
+ 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("ui_size is %lld, synced_i_size is %lld, but inode is clean",
+ ui->ui_size, ui->synced_i_size);
+ ubifs_err("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 qstr nm = { .name = NULL };
+ 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;
+ return err;
+ }
+
+ nm.name = dent->name;
+ nm.len = le16_to_cpu(dent->nlen);
+ size += CALC_DENT_SIZE(nm.len);
+ 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("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("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(!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("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("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);
+ goto out_free;
+ }
+
+ key_read(c, &dent2->key, &key);
+ if (keys_cmp(c, &zbr2->key, &key)) {
+ ubifs_err("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("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);
+ 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("2 xent/dent nodes with the same name");
+ else
+ ubifs_err("bad order of colliding key %s",
+ dbg_snprintf_key(c, &key, key_buf, DBG_KEY_BUF_LEN));
+
+ ubifs_msg("first node at %d:%d\n", zbr1->lnum, zbr1->offs);
+ ubifs_dump_node(c, dent1);
+ ubifs_msg("second node at %d:%d\n", zbr2->lnum, zbr2->offs);
+ ubifs_dump_node(c, dent2);
+
+out_free:
+ kfree(dent2);
+ kfree(dent1);
+ return err;
}
-#endif /* CONFIG_UBIFS_FS_DEBUG */
+/**
+ * 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("failed, error %d", err);
+ ubifs_msg("dump of the znode");
+ ubifs_dump_znode(c, znode);
+ if (zp) {
+ ubifs_msg("dump of the parent znode");
+ ubifs_dump_znode(c, zp);
+ }
+ dump_stack();
+ return -EINVAL;
+}
+#else
+
+int dbg_check_dir(struct ubifs_info *c, const struct inode *dir)
+{
+ return 0;
+}
+
+void dbg_debugfs_exit_fs(struct ubifs_info *c)
+{
+ return;
+}
+
+int ubifs_debugging_init(struct ubifs_info *c)
+{
+ return 0;
+}
+void ubifs_debugging_exit(struct ubifs_info *c)
+{
+}
+int dbg_check_filesystem(struct ubifs_info *c)
+{
+ return 0;
+}
+int dbg_debugfs_init_fs(struct ubifs_info *c)
+{
+ return 0;
+}
+#endif
+
+#ifndef __UBOOT__
+/**
+ * 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(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(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("first znode");
+ ubifs_dump_znode(c, prev);
+ ubifs_msg("second znode");
+ ubifs_dump_znode(c, znode);
+ return -EINVAL;
+ }
+ }
+ }
+
+ if (extra) {
+ if (clean_cnt != atomic_long_read(&c->clean_zn_cnt)) {
+ ubifs_err("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("incorrect dirty_zn_cnt %ld, calculated %ld",
+ atomic_long_read(&c->dirty_zn_cnt),
+ dirty_cnt);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+#else
+int dbg_check_tnc(struct ubifs_info *c, int extra)
+{
+ return 0;
+}
+#endif
+
+/**
+ * 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;
+ }
+ zbr->znode = child;
+ }
+
+ 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("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("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("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("error %d while walking the index", err);
+ return err;
+ }
+
+ if (calc != idx_size) {
+ ubifs_err("index size check failed: calculated size is %lld, should be %lld",
+ calc, idx_size);
+ dump_stack();
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+#ifndef __UBOOT__
+/**
+ * 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("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("inode %lu not found in index", (unsigned long)inum);
+ return ERR_PTR(-ENOENT);
+ } else if (err < 0) {
+ ubifs_err("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("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("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("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("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("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("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("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("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;
+
+ /*
+ * 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("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("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;
+
+ 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("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("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("dump of node at LEB %d:%d", zbr->lnum, zbr->offs);
+ ubifs_dump_node(c, node);
+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("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("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("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("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("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("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("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("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("inode %lu not found in index",
+ (unsigned long)fscki->inum);
+ return -ENOENT;
+ } else if (err < 0) {
+ ubifs_err("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("cannot read inode node at LEB %d:%d, error %d",
+ zbr->lnum, zbr->offs, err);
+ kfree(ino);
+ return err;
+ }
+
+ ubifs_msg("dump of the inode %lu sitting in LEB %d:%d",
+ (unsigned long)fscki->inum, zbr->lnum, zbr->offs);
+ ubifs_dump_node(c, ino);
+ 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("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("bad node type %d", sa->type);
+ ubifs_dump_node(c, sa->node);
+ return -EINVAL;
+ }
+ if (sb->type != UBIFS_DATA_NODE) {
+ ubifs_err("bad node type %d", sb->type);
+ ubifs_dump_node(c, sb->node);
+ return -EINVAL;
+ }
+
+ inuma = key_inum(c, &sa->key);
+ inumb = key_inum(c, &sb->key);
+
+ if (inuma < inumb)
+ continue;
+ if (inuma > inumb) {
+ ubifs_err("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("larger block %u goes before %u", blka, blkb);
+ goto error_dump;
+ }
+ if (blka == blkb) {
+ ubifs_err("two data nodes for the same block");
+ goto error_dump;
+ }
+ }
+
+ return 0;
+
+error_dump:
+ ubifs_dump_node(c, sa->node);
+ ubifs_dump_node(c, sb->node);
+ 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("bad node type %d", sa->type);
+ ubifs_dump_node(c, sa->node);
+ return -EINVAL;
+ }
+ if (sa->type != UBIFS_INO_NODE && sa->type != UBIFS_DENT_NODE &&
+ sa->type != UBIFS_XENT_NODE) {
+ ubifs_err("bad node type %d", sb->type);
+ ubifs_dump_node(c, sb->node);
+ return -EINVAL;
+ }
+
+ if (sa->type != UBIFS_INO_NODE && sb->type == UBIFS_INO_NODE) {
+ ubifs_err("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("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("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("larger hash %u goes before %u",
+ hasha, hashb);
+ goto error_dump;
+ }
+ }
+
+ return 0;
+
+error_dump:
+ ubifs_msg("dumping first node");
+ ubifs_dump_node(c, sa->node);
+ ubifs_msg("dumping second node");
+ ubifs_dump_node(c, sb->node);
+ return -EINVAL;
+ return 0;
+}
+
+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(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 withing 1 minute */
+ delay = prandom_u32() % 60000;
+ d->pc_timeout = jiffies;
+ d->pc_timeout += msecs_to_jiffies(delay);
+ ubifs_warn("failing after %lums", delay);
+ } else {
+ d->pc_delay = 2;
+ delay = prandom_u32() % 10000;
+ /* Fail within 10000 operations */
+ d->pc_cnt_max = delay;
+ ubifs_warn("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("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("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("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("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("failing in orphan LEB %d", lnum);
+ } else if (lnum == c->ihead_lnum) {
+ if (chance(99, 100))
+ return 0;
+ ubifs_warn("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("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("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("failing in bud LEB %d commit running", lnum);
+ } else {
+ if (chance(9999, 10000))
+ return 0;
+ ubifs_warn("failing in bud LEB %d commit not running", lnum);
+ }
+
+ d->pc_happened = 1;
+ ubifs_warn("========== 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("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 (c->dbg->pc_happened)
+ return -EROFS;
+
+ failing = power_cut_emulated(c, lnum, 1);
+ if (failing) {
+ len = corrupt_data(c, buf, len);
+ ubifs_warn("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 (c->dbg->pc_happened)
+ 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 (c->dbg->pc_happened)
+ 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 (c->dbg->pc_happened)
+ 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;
+
+ /*
+ * TODO: this is racy - the file-system might have already been
+ * unmounted and we'd oops in this case. The plan is to fix it with
+ * help of 'iterate_supers_type()' which we should have in v3.0: when
+ * a debugfs opened, we rember FS's UUID in file->private_data. Then
+ * whenever we access the FS via a debugfs file, we iterate all UBIFS
+ * superblocks and fine the one with the same UUID, and take the
+ * locking right.
+ *
+ * The other way to go suggested by Al Viro is to create a separate
+ * 'ubifs-debug' file-system instead.
+ */
+ 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. Returns
+ * zero in case of success and a negative error code in case of failure.
+ *
+ * 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.
+ */
+int dbg_debugfs_init_fs(struct ubifs_info *c)
+{
+ int err, n;
+ const char *fname;
+ struct dentry *dent;
+ struct ubifs_debug_info *d = c->dbg;
+
+ if (!IS_ENABLED(CONFIG_DEBUG_FS))
+ return 0;
+
+ 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 */
+ fname = UBIFS_DFS_DIR_NAME;
+ dent = ERR_PTR(-EINVAL);
+ goto out;
+ }
+
+ fname = d->dfs_dir_name;
+ dent = debugfs_create_dir(fname, dfs_rootdir);
+ if (IS_ERR_OR_NULL(dent))
+ goto out;
+ d->dfs_dir = dent;
+
+ fname = "dump_lprops";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_dump_lprops = dent;
+
+ fname = "dump_budg";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_dump_budg = dent;
+
+ fname = "dump_tnc";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_dump_tnc = dent;
+
+ fname = "chk_general";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_chk_gen = dent;
+
+ fname = "chk_index";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_chk_index = dent;
+
+ fname = "chk_orphans";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_chk_orph = dent;
+
+ fname = "chk_lprops";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_chk_lprops = dent;
+
+ fname = "chk_fs";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_chk_fs = dent;
+
+ fname = "tst_recovery";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_tst_rcvry = dent;
+
+ fname = "ro_error";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_ro_error = dent;
+
+ return 0;
+
+out_remove:
+ debugfs_remove_recursive(d->dfs_dir);
+out:
+ err = dent ? PTR_ERR(dent) : -ENODEV;
+ ubifs_err("cannot create \"%s\" debugfs file or directory, error %d\n",
+ fname, err);
+ return err;
+}
+
+/**
+ * dbg_debugfs_exit_fs - remove all debugfs files.
+ * @c: UBIFS file-system description object
+ */
+void dbg_debugfs_exit_fs(struct ubifs_info *c)
+{
+ if (IS_ENABLED(CONFIG_DEBUG_FS))
+ 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. Returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+int dbg_debugfs_init(void)
+{
+ int err;
+ const char *fname;
+ struct dentry *dent;
+
+ if (!IS_ENABLED(CONFIG_DEBUG_FS))
+ return 0;
+
+ fname = "ubifs";
+ dent = debugfs_create_dir(fname, NULL);
+ if (IS_ERR_OR_NULL(dent))
+ goto out;
+ dfs_rootdir = dent;
+
+ fname = "chk_general";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
+ &dfs_global_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ dfs_chk_gen = dent;
+
+ fname = "chk_index";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
+ &dfs_global_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ dfs_chk_index = dent;
+
+ fname = "chk_orphans";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
+ &dfs_global_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ dfs_chk_orph = dent;
+
+ fname = "chk_lprops";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
+ &dfs_global_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ dfs_chk_lprops = dent;
+
+ fname = "chk_fs";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
+ &dfs_global_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ dfs_chk_fs = dent;
+
+ fname = "tst_recovery";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
+ &dfs_global_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ dfs_tst_rcvry = dent;
+
+ return 0;
+
+out_remove:
+ debugfs_remove_recursive(dfs_rootdir);
+out:
+ err = dent ? PTR_ERR(dent) : -ENODEV;
+ ubifs_err("cannot create \"%s\" debugfs file or directory, error %d\n",
+ fname, err);
+ return err;
+}
+
+/**
+ * dbg_debugfs_exit - remove the "ubifs" directory from debugfs file-system.
+ */
+void dbg_debugfs_exit(void)
+{
+ if (IS_ENABLED(CONFIG_DEBUG_FS))
+ debugfs_remove_recursive(dfs_rootdir);
+}
+
+/**
+ * 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);
+}
+#endif
projects / karo-tx-uboot.git / blobdiff