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-rw-r--r--fs/ext4/dir.c4
-rw-r--r--fs/ext4/ext4.h5
-rw-r--r--fs/ext4/ialloc.c6
-rw-r--r--fs/ext4/inode.c11
-rw-r--r--fs/ext4/mballoc.c7
-rw-r--r--fs/ext4/namei.c14
-rw-r--r--fs/ext4/super.c58
7 files changed, 101 insertions, 4 deletions
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 164c560..f00b0a0 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -90,6 +90,10 @@ int __ext4_check_dir_entry(const char *function, unsigned int line,
else
return 0;
+ /* for debugging, sangwoo2.lee */
+ print_bh(dir->i_sb, bh, 0, EXT4_BLOCK_SIZE(dir->i_sb));
+ /* for debugging */
+
if (filp)
ext4_error_file(filp, function, line, bh ? bh->b_blocknr : 0,
"bad entry in directory: %s - offset=%u(%u), "
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 1a34c1c..73490d9 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1931,6 +1931,11 @@ extern __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 group,
struct ext4_group_desc *gdp);
extern int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 group,
struct ext4_group_desc *gdp);
+/* for debugging, sangwoo2.lee */
+extern void print_bh(struct super_block *sb, struct buffer_head *bh, int start, int len);
+extern void print_block_data(struct super_block *sb, sector_t blocknr, unsigned char *data_to_dump, int start, int len);
+/* for debugging */
+
static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
{
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 21bb2f6..b5c25ba 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -285,8 +285,12 @@ out:
if (!fatal)
fatal = err;
ext4_mark_super_dirty(sb);
- } else
+ } else {
+ /* for debugging, sangwoo2.lee */
+ print_bh(sb, bitmap_bh, 0, EXT4_BLOCK_SIZE(sb));
+ /* for debugging */
ext4_error(sb, "bit already cleared for inode %lu", ino);
+ }
error_return:
brelse(bitmap_bh);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 55d3e51..83cd4cf 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1182,6 +1182,11 @@ static int __check_block_validity(struct inode *inode, const char *func,
{
if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), map->m_pblk,
map->m_len)) {
+ /* for debugging, sangwoo2.lee */
+ printk(KERN_ERR "printing inode..\n");
+ print_block_data(inode->i_sb, 0, (unsigned char *)inode, 0, EXT4_INODE_SIZE(inode->i_sb));
+ /* for debugging */
+
ext4_error_inode(inode, func, line, map->m_pblk,
"lblock %lu mapped to illegal pblock "
"(length %d)", (unsigned long) map->m_lblk,
@@ -4941,6 +4946,12 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
if (inode->i_mode == 0 ||
!(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_ORPHAN_FS)) {
/* this inode is deleted */
+ /* for debugging, sangwoo2.lee */
+ printk(KERN_ERR "iloc info, offset : %lu, group# : %u\n", iloc.offset, iloc.block_group);
+ printk(KERN_ERR "sb info, inodes per group : %lu, inode size : %d\n", EXT4_SB(sb)->s_inodes_per_group, EXT4_SB(sb)->s_inode_size);
+ print_bh(sb, iloc.bh, 0, EXT4_BLOCK_SIZE(sb));
+ /* for debugging */
+
ret = -ESTALE;
goto bad_inode;
}
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 0f1be7f..d37c2e3 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -731,6 +731,10 @@ void ext4_mb_generate_buddy(struct super_block *sb,
grp->bb_fragments = fragments;
if (free != grp->bb_free) {
+ /* for more specific debugging, sangwoo2.lee */
+ print_block_data(sb, 0, bitmap, 0, EXT4_BLOCK_SIZE(sb));
+ /* for more specific debugging */
+
ext4_grp_locked_error(sb, group, 0, 0,
"%u blocks in bitmap, %u in gd",
free, grp->bb_free);
@@ -1338,6 +1342,9 @@ static void mb_free_blocks(struct inode *inode, struct ext4_buddy *e4b,
blocknr = ext4_group_first_block_no(sb, e4b->bd_group);
blocknr += block;
+ /* for debugging, sangwoo2.lee */
+ print_block_data(sb, blocknr, EXT4_MB_BITMAP(e4b), 0, EXT4_BLOCK_SIZE(sb));
+ /* for debugging */
ext4_grp_locked_error(sb, e4b->bd_group,
inode ? inode->i_ino : 0,
blocknr,
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 3d36d5a..5767c50 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1031,17 +1031,25 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, stru
inode = NULL;
if (bh) {
__u32 ino = le32_to_cpu(de->inode);
- brelse(bh);
if (!ext4_valid_inum(dir->i_sb, ino)) {
+ /* for debugging, sangwoo2.lee */
+ printk(KERN_ERR "Name of directory entry has bad inode# : %s\n", de->name);
+ print_bh(dir->i_sb, bh, 0, EXT4_BLOCK_SIZE(dir->i_sb));
+ /* for debugging */
+ brelse(bh);
+
EXT4_ERROR_INODE(dir, "bad inode number: %u", ino);
return ERR_PTR(-EIO);
}
+ brelse(bh);
+
inode = ext4_iget(dir->i_sb, ino);
if (IS_ERR(inode)) {
if (PTR_ERR(inode) == -ESTALE) {
+ /* In case of -ESTALE, printing debugging data is already done in ext4_iget */
EXT4_ERROR_INODE(dir,
- "deleted inode referenced: %u",
- ino);
+ "deleted inode referenced: %u at parent inode : %lu",
+ ino, dir->i_ino);
return ERR_PTR(-EIO);
} else {
return ERR_CAST(inode);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index df121b2..e10a393 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -433,6 +433,7 @@ void __ext4_error(struct super_block *sb, const char *function,
printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n",
sb->s_id, function, line, current->comm, &vaf);
va_end(args);
+ save_error_info(sb, function, line);
ext4_handle_error(sb);
}
@@ -3721,8 +3722,16 @@ no_journal:
return 0;
cantfind_ext4:
+
+ /* for debugging, sangwoo2.lee */
+ /* If you wanna use the flag 'MS_SILENT', call 'print_bh' function within below 'if'. */
+ printk("printing data of superblock-bh\n");
+ print_bh(sb, bh, 0, EXT4_BLOCK_SIZE(sb));
+ /* for debugging */
+
if (!silent)
ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
+
goto failed_mount;
failed_mount4:
@@ -4821,6 +4830,55 @@ out:
#endif
+/* for debugging, sangwoo2.lee */
+void print_bh(struct super_block *sb, struct buffer_head *bh, int start, int len)
+{
+ print_block_data(sb, bh->b_blocknr, bh->b_data, start, len);
+}
+
+void print_block_data(struct super_block *sb, sector_t blocknr, unsigned char *data_to_dump, int start, int len)
+{
+ int i, j;
+ int bh_offset = (start / 16) * 16;
+ char row_data[17] = { 0, };
+ char row_hex[50] = { 0, };
+ char ch;
+
+ printk(KERN_ERR "As EXT4-fs error, printing data in hex\n");
+ printk(KERN_ERR " [partition info] s_id : %s, start block# : %llu\n", sb->s_id, sb->s_bdev->bd_part->start_sect);
+ printk(KERN_ERR " dump block# : %llu, start offset(byte) : %d, length(byte) : %d\n", blocknr, start, len);
+ printk(KERN_ERR "-----------------------------------------------------------------------------\n");
+
+ for (i = 0; i < (len + 15) / 16; i++)
+ {
+ for (j = 0; j < 16; j++)
+ {
+ ch = *(data_to_dump + bh_offset + j);
+ if (start <= bh_offset + j && start + len > bh_offset + j)
+ {
+ if (isascii(ch) && isprint(ch))
+ sprintf(row_data + j, "%c", ch);
+ else
+ sprintf(row_data + j, ".");
+
+ sprintf(row_hex + (j * 3), "%2.2x ", ch);
+ }
+ else
+ {
+ sprintf(row_data + j, " ");
+ sprintf(row_hex + (j * 3), "-- ");
+ }
+ }
+
+ printk(KERN_ERR "0x%4.4x : %s | %s\n", bh_offset, row_hex, row_data);
+ bh_offset += 16;
+
+ }
+ printk(KERN_ERR "-----------------------------------------------------------------------------\n");
+}
+/* for debugging */
+
+
static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags,
const char *dev_name, void *data)
{
generated by cgit v1.1 at 2024-04-27 20:59:04 +0000