/*
* This function forces out the primary superblock. We need to only
* write out those fields which we have changed, since if the
* filesystem is mounted, it may have changed some of the other
* fields.
*
* It takes as input a superblock which has already been byte swapped
* (if necessary).
*
*/
static errcode_t write_primary_superblock(ext2_filsys fs,
struct ext2_super_block *super)
{
__u16 *old_super, *new_super;
int check_idx, write_idx, size;
errcode_t retval;
if (!fs->io->manager->write_byte || !fs->orig_super) {
io_channel_set_blksize(fs->io, SUPERBLOCK_OFFSET);
retval = io_channel_write_blk(fs->io, 1, -SUPERBLOCK_SIZE,
super);
io_channel_set_blksize(fs->io, fs->blocksize);
return retval;
}
old_super = (__u16 *) fs->orig_super;
new_super = (__u16 *) super;
for (check_idx = 0; check_idx < SUPERBLOCK_SIZE/2; check_idx++) {
if (old_super[check_idx] == new_super[check_idx])
continue;
write_idx = check_idx;
for (check_idx++; check_idx < SUPERBLOCK_SIZE/2; check_idx++)
if (old_super[check_idx] == new_super[check_idx])
break;
size = 2 * (check_idx - write_idx);
#if 0
printf("Writing %d bytes starting at %d\n",
size, write_idx*2);
#endif
retval = io_channel_write_byte(fs->io,
SUPERBLOCK_OFFSET + (2 * write_idx), size,
new_super + write_idx);
if (retval)
return retval;
}
memcpy(fs->orig_super, super, SUPERBLOCK_SIZE);
return 0;
}
/*
* This function zeros out the allocated block, and updates all of the
* appropriate filesystem records.
*/
errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
char *block_buf, blk_t *ret)
{
errcode_t retval;
blk_t block;
char *buf = 0;
if (!block_buf) {
retval = ext2fs_get_mem(fs->blocksize, &buf);
if (retval)
return retval;
block_buf = buf;
}
memset(block_buf, 0, fs->blocksize);
if (!fs->block_map) {
retval = ext2fs_read_block_bitmap(fs);
if (retval)
goto fail;
}
retval = ext2fs_new_block(fs, goal, 0, &block);
if (retval)
goto fail;
retval = io_channel_write_blk(fs->io, block, 1, block_buf);
if (retval)
goto fail;
ext2fs_block_alloc_stats(fs, block, +1);
*ret = block;
return 0;
fail:
if (buf)
ext2fs_free_mem(&buf);
return retval;
}
static void zap_sector(ext2_filsys fs, int sect, int nsect)
{
char *buf;
int retval;
unsigned int *magic;
buf = malloc(512*nsect);
if (!buf) {
printf(_("Out of memory erasing sectors %d-%d\n"),
sect, sect + nsect - 1);
exit(1);
}
if (sect == 0) {
/* Check for a BSD disklabel, and don't erase it if so */
retval = io_channel_read_blk(fs->io, 0, -512, buf);
if (retval)
fprintf(stderr,
_("Warning: could not read block 0: %s\n"),
error_message(retval));
else {
magic = (unsigned int *) (buf + BSD_LABEL_OFFSET);
if ((*magic == BSD_DISKMAGIC) ||
(*magic == BSD_MAGICDISK))
return;
}
}
memset(buf, 0, 512*nsect);
io_channel_set_blksize(fs->io, 512);
retval = io_channel_write_blk(fs->io, sect, -512*nsect, buf);
io_channel_set_blksize(fs->io, fs->blocksize);
free(buf);
if (retval)
fprintf(stderr, _("Warning: could not erase sector %d: %s\n"),
sect, error_message(retval));
}
errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, void *inbuf)
{
errcode_t retval;
char *write_buf;
char *buf = NULL;
#ifdef EXT2FS_ENABLE_SWAPFS
if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
(fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)) {
retval = ext2fs_get_mem(fs->blocksize, (void **) &buf);
if (retval)
return retval;
write_buf = buf;
ext2fs_swap_ext_attr(fs, buf, inbuf);
} else
#endif
write_buf = (char *) inbuf;
retval = io_channel_write_blk(fs->io, block, 1, write_buf);
if (buf)
ext2fs_free_mem((void **) &buf);
if (!retval)
ext2fs_mark_changed(fs);
return retval;
}
/*
* Remove an external journal from the filesystem
*/
static void remove_journal_device(ext2_filsys fs)
{
char *journal_path;
ext2_filsys jfs;
char buf[1024];
journal_superblock_t *jsb;
int i, nr_users;
errcode_t retval;
int commit_remove_journal = 0;
if (f_flag)
commit_remove_journal = 1; /* force removal even if error */
uuid_unparse(fs->super->s_journal_uuid, buf);
journal_path = get_spec_by_uuid(buf);
if (!journal_path) {
journal_path =
ext2fs_find_block_device(fs->super->s_journal_dev);
if (!journal_path)
return;
}
retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
EXT2_FLAG_JOURNAL_DEV_OK, 0,
fs->blocksize, unix_io_manager, &jfs);
if (retval) {
com_err(program_name, retval,
_("while trying to open external journal"));
goto no_valid_journal;
}
if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
fprintf(stderr, _("%s is not a journal device.\n"),
journal_path);
goto no_valid_journal;
}
/* Get the journal superblock */
if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
com_err(program_name, retval,
_("while reading journal superblock"));
goto no_valid_journal;
}
jsb = (journal_superblock_t *) buf;
if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
(jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
fprintf(stderr, _("Journal superblock not found!\n"));
goto no_valid_journal;
}
/* Find the filesystem UUID */
nr_users = ntohl(jsb->s_nr_users);
for (i=0; i < nr_users; i++) {
if (memcmp(fs->super->s_uuid,
&jsb->s_users[i*16], 16) == 0)
break;
}
if (i >= nr_users) {
fprintf(stderr,
_("Filesystem's UUID not found on journal device.\n"));
commit_remove_journal = 1;
goto no_valid_journal;
}
nr_users--;
for (i=0; i < nr_users; i++)
memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
jsb->s_nr_users = htonl(nr_users);
/* Write back the journal superblock */
if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
com_err(program_name, retval,
"while writing journal superblock.");
goto no_valid_journal;
}
commit_remove_journal = 1;
no_valid_journal:
if (commit_remove_journal == 0) {
fprintf(stderr, _("Journal NOT removed\n"));
exit(1);
}
fs->super->s_journal_dev = 0;
memset(fs->super->s_journal_uuid, 0,
sizeof(fs->super->s_journal_uuid));
ext2fs_mark_super_dirty(fs);
printf(_("Journal removed\n"));
free(journal_path);
}
errcode_t ext2fs_flush(ext2_filsys fs)
{
dgrp_t i;
errcode_t retval;
unsigned long fs_state;
__u32 feature_incompat;
struct ext2_super_block *super_shadow = 0;
struct ext2_group_desc *group_shadow = 0;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
struct ext2_group_desc *s, *t;
dgrp_t j;
#endif
char *group_ptr;
int old_desc_blocks;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
fs_state = fs->super->s_state;
feature_incompat = fs->super->s_feature_incompat;
fs->super->s_wtime = fs->now ? fs->now : time(NULL);
fs->super->s_block_group_nr = 0;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
retval = EXT2_ET_NO_MEMORY;
retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super_shadow);
if (retval)
goto errout;
retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
&group_shadow);
if (retval)
goto errout;
memset(group_shadow, 0, (size_t) fs->blocksize *
fs->desc_blocks);
/* swap the group descriptors */
for (j=0, s=fs->group_desc, t=group_shadow;
j < fs->group_desc_count; j++, t++, s++) {
*t = *s;
ext2fs_swap_group_desc(t);
}
#else
super_shadow = fs->super;
group_shadow = fs->group_desc;
#endif
/*
* Set the state of the FS to be non-valid. (The state has
* already been backed up earlier, and will be restored after
* we write out the backup superblocks.)
*/
fs->super->s_state &= ~EXT2_VALID_FS;
fs->super->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
*super_shadow = *fs->super;
ext2fs_swap_super(super_shadow);
#endif
/*
* If this is an external journal device, don't write out the
* block group descriptors or any of the backup superblocks
*/
if (fs->super->s_feature_incompat &
EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
goto write_primary_superblock_only;
/*
* Write out the master group descriptors, and the backup
* superblocks and group descriptors.
*/
group_ptr = (char *) group_shadow;
if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
old_desc_blocks = fs->super->s_first_meta_bg;
else
old_desc_blocks = fs->desc_blocks;
for (i = 0; i < fs->group_desc_count; i++) {
blk_t super_blk, old_desc_blk, new_desc_blk;
int meta_bg;
ext2fs_super_and_bgd_loc(fs, i, &super_blk, &old_desc_blk,
&new_desc_blk, &meta_bg);
if (!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) &&i && super_blk) {
retval = write_backup_super(fs, i, super_blk,
super_shadow);
if (retval)
goto errout;
}
if (fs->flags & EXT2_FLAG_SUPER_ONLY)
continue;
if ((old_desc_blk) &&
(!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) || (i == 0))) {
retval = io_channel_write_blk(fs->io,
old_desc_blk, old_desc_blocks, group_ptr);
if (retval)
goto errout;
}
if (new_desc_blk) {
retval = io_channel_write_blk(fs->io, new_desc_blk,
1, group_ptr + (meta_bg*fs->blocksize));
if (retval)
goto errout;
}
}
/*
* If the write_bitmaps() function is present, call it to
* flush the bitmaps. This is done this way so that a simple
* program that doesn't mess with the bitmaps doesn't need to
* drag in the bitmaps.c code.
*/
if (fs->write_bitmaps) {
retval = fs->write_bitmaps(fs);
if (retval)
goto errout;
}
write_primary_superblock_only:
/*
* Write out master superblock. This has to be done
* separately, since it is located at a fixed location
* (SUPERBLOCK_OFFSET). We flush all other pending changes
* out to disk first, just to avoid a race condition with an
* insy-tinsy window....
*/
fs->super->s_block_group_nr = 0;
fs->super->s_state = fs_state;
fs->super->s_feature_incompat = feature_incompat;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
*super_shadow = *fs->super;
ext2fs_swap_super(super_shadow);
#endif
retval = io_channel_flush(fs->io);
retval = write_primary_superblock(fs, super_shadow);
if (retval)
goto errout;
fs->flags &= ~EXT2_FLAG_DIRTY;
retval = io_channel_flush(fs->io);
errout:
fs->super->s_state = fs_state;
#if defined(WORDS_BIGENDIAN) || (BYTE_ORDER == BIG_ENDIAN)
if (super_shadow)
ext2fs_free_mem(&super_shadow);
if (group_shadow)
ext2fs_free_mem(&group_shadow);
#endif
return retval;
}
static int mkjournal_proc(ext2_filsys fs,
blk_t *blocknr,
e2_blkcnt_t blockcnt,
blk_t ref_block EXT2FS_ATTR((unused)),
int ref_offset EXT2FS_ATTR((unused)),
void *priv_data)
{
struct mkjournal_struct *es = (struct mkjournal_struct *) priv_data;
blk_t new_blk;
errcode_t retval;
if (*blocknr) {
es->goal = *blocknr;
return 0;
}
retval = ext2fs_new_block(fs, es->goal, 0, &new_blk);
if (retval) {
es->err = retval;
return BLOCK_ABORT;
}
if (blockcnt >= 0)
es->num_blocks--;
es->newblocks++;
retval = 0;
if (blockcnt <= 0)
retval = io_channel_write_blk(fs->io, new_blk, 1, es->buf);
else {
if (es->zero_count) {
if ((es->blk_to_zero + es->zero_count == new_blk) &&
(es->zero_count < 1024))
es->zero_count++;
else {
retval = ext2fs_zero_blocks(fs,
es->blk_to_zero,
es->zero_count,
0, 0);
es->zero_count = 0;
}
}
if (es->zero_count == 0) {
es->blk_to_zero = new_blk;
es->zero_count = 1;
}
}
if (blockcnt == 0)
memset(es->buf, 0, fs->blocksize);
if (retval) {
es->err = retval;
return BLOCK_ABORT;
}
*blocknr = es->goal = new_blk;
ext2fs_block_alloc_stats(fs, new_blk, +1);
if (es->num_blocks == 0)
return (BLOCK_CHANGED | BLOCK_ABORT);
else
return BLOCK_CHANGED;
}
static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block)
{
dgrp_t i;
unsigned int j;
int block_nbytes, inode_nbytes;
unsigned int nbits;
errcode_t retval;
char *block_bitmap, *inode_bitmap;
char *block_buf, *inode_buf;
int lazy_flag = 0;
blk_t blk;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
if (!(fs->flags & EXT2_FLAG_RW))
return EXT2_ET_RO_FILSYS;
if (EXT2_HAS_COMPAT_FEATURE(fs->super,
EXT2_FEATURE_COMPAT_LAZY_BG))
lazy_flag = 1;
inode_nbytes = block_nbytes = 0;
block_bitmap = inode_bitmap = 0;
if (do_block) {
block_bitmap = fs->block_map->bitmap;
block_nbytes = EXT2_BLOCKS_PER_GROUP(fs->super) / 8;
retval = ext2fs_get_mem(fs->blocksize, &block_buf);
if (retval)
return retval;
memset(block_buf, 0xff, fs->blocksize);
}
if (do_inode) {
inode_bitmap = fs->inode_map->bitmap;
inode_nbytes = (size_t)
((EXT2_INODES_PER_GROUP(fs->super)+7) / 8);
retval = ext2fs_get_mem(fs->blocksize, &inode_buf);
if (retval)
return retval;
memset(inode_buf, 0xff, fs->blocksize);
}
for (i = 0; i < fs->group_desc_count; i++) {
if (!block_bitmap || !do_block)
goto skip_block_bitmap;
if (lazy_flag && fs->group_desc[i].bg_flags &
EXT2_BG_BLOCK_UNINIT)
goto skip_this_block_bitmap;
memcpy(block_buf, block_bitmap, block_nbytes);
if (i == fs->group_desc_count - 1) {
/* Force bitmap padding for the last group */
nbits = ((fs->super->s_blocks_count
- fs->super->s_first_data_block)
% EXT2_BLOCKS_PER_GROUP(fs->super));
if (nbits)
for (j = nbits; j < fs->blocksize * 8; j++)
ext2fs_set_bit(j, block_buf);
}
blk = fs->group_desc[i].bg_block_bitmap;
if (blk) {
#ifdef EXT2_BIG_ENDIAN_BITMAPS
if (!((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
(fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)))
ext2fs_swap_bitmap(fs, block_buf,
block_nbytes);
#endif
retval = io_channel_write_blk(fs->io, blk, 1,
block_buf);
if (retval)
return EXT2_ET_BLOCK_BITMAP_WRITE;
}
skip_this_block_bitmap:
block_bitmap += block_nbytes;
skip_block_bitmap:
if (!inode_bitmap || !do_inode)
continue;
if (lazy_flag && fs->group_desc[i].bg_flags &
EXT2_BG_INODE_UNINIT)
goto skip_this_inode_bitmap;
memcpy(inode_buf, inode_bitmap, inode_nbytes);
blk = fs->group_desc[i].bg_inode_bitmap;
if (blk) {
#ifdef EXT2_BIG_ENDIAN_BITMAPS
if (!((fs->flags & EXT2_FLAG_SWAP_BYTES) ||
(fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)))
ext2fs_swap_bitmap(fs, inode_buf,
inode_nbytes);
#endif
retval = io_channel_write_blk(fs->io, blk, 1,
inode_buf);
if (retval)
return EXT2_ET_INODE_BITMAP_WRITE;
}
skip_this_inode_bitmap:
inode_bitmap += inode_nbytes;
}
if (do_block) {
fs->flags &= ~EXT2_FLAG_BB_DIRTY;
ext2fs_free_mem(&block_buf);
}
if (do_inode) {
fs->flags &= ~EXT2_FLAG_IB_DIRTY;
ext2fs_free_mem(&inode_buf);
}
return 0;
}
errcode_t ext2fs_flush(ext2_filsys fs)
{
dgrp_t i;
errcode_t retval;
unsigned long fs_state;
__u32 feature_incompat;
struct ext2_super_block *super_shadow = 0;
struct ext2_group_desc *group_shadow = 0;
#ifdef WORDS_BIGENDIAN
struct ext2_group_desc *s, *t;
dgrp_t j;
#endif
char *group_ptr;
int old_desc_blocks;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
fs_state = fs->super->s_state;
feature_incompat = fs->super->s_feature_incompat;
fs->super->s_wtime = fs->now ? fs->now : time(NULL);
fs->super->s_block_group_nr = 0;
#ifdef WORDS_BIGENDIAN
retval = EXT2_ET_NO_MEMORY;
retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super_shadow);
if (retval)
goto errout;
retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
&group_shadow);
if (retval)
goto errout;
memset(group_shadow, 0, (size_t) fs->blocksize *
fs->desc_blocks);
for (j=0, s=fs->group_desc, t=group_shadow;
j < fs->group_desc_count; j++, t++, s++) {
*t = *s;
ext2fs_swap_group_desc(t);
}
#else
super_shadow = fs->super;
group_shadow = fs->group_desc;
#endif
fs->super->s_state &= ~EXT2_VALID_FS;
fs->super->s_feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER;
#ifdef WORDS_BIGENDIAN
*super_shadow = *fs->super;
ext2fs_swap_super(super_shadow);
#endif
if (fs->super->s_feature_incompat &
EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
goto write_primary_superblock_only;
group_ptr = (char *) group_shadow;
if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
old_desc_blocks = fs->super->s_first_meta_bg;
else
old_desc_blocks = fs->desc_blocks;
for (i = 0; i < fs->group_desc_count; i++) {
blk_t super_blk, old_desc_blk, new_desc_blk;
int meta_bg;
ext2fs_super_and_bgd_loc(fs, i, &super_blk, &old_desc_blk,
&new_desc_blk, &meta_bg);
if (!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) &&i && super_blk) {
retval = write_backup_super(fs, i, super_blk,
super_shadow);
if (retval)
goto errout;
}
if (fs->flags & EXT2_FLAG_SUPER_ONLY)
continue;
if ((old_desc_blk) &&
(!(fs->flags & EXT2_FLAG_MASTER_SB_ONLY) || (i == 0))) {
retval = io_channel_write_blk(fs->io,
old_desc_blk, old_desc_blocks, group_ptr);
if (retval)
goto errout;
}
if (new_desc_blk) {
retval = io_channel_write_blk(fs->io, new_desc_blk,
1, group_ptr + (meta_bg*fs->blocksize));
if (retval)
goto errout;
}
}
if (fs->write_bitmaps) {
retval = fs->write_bitmaps(fs);
if (retval)
goto errout;
}
write_primary_superblock_only:
fs->super->s_block_group_nr = 0;
fs->super->s_state = fs_state;
fs->super->s_feature_incompat = feature_incompat;
#ifdef WORDS_BIGENDIAN
*super_shadow = *fs->super;
ext2fs_swap_super(super_shadow);
#endif
retval = io_channel_flush(fs->io);
retval = write_primary_superblock(fs, super_shadow);
if (retval)
goto errout;
fs->flags &= ~EXT2_FLAG_DIRTY;
retval = io_channel_flush(fs->io);
errout:
fs->super->s_state = fs_state;
#ifdef WORDS_BIGENDIAN
if (super_shadow)
ext2fs_free_mem(&super_shadow);
if (group_shadow)
ext2fs_free_mem(&group_shadow);
#endif
return retval;
}
errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
struct ext2_inode * inode, int bufsize)
{
unsigned long group, block, block_nr, offset;
errcode_t retval = 0;
struct ext2_inode_large temp_inode, *w_inode;
char *ptr;
int clen, i, length;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/* Check to see if user provided an override function */
if (fs->write_inode) {
retval = (fs->write_inode)(fs, ino, inode);
if (retval != EXT2_ET_CALLBACK_NOTHANDLED)
return retval;
}
/* Check to see if the inode cache needs to be updated */
if (fs->icache) {
for (i=0; i < fs->icache->cache_size; i++) {
if (fs->icache->cache[i].ino == ino) {
fs->icache->cache[i].inode = *inode;
break;
}
}
} else {
retval = create_icache(fs);
if (retval)
return retval;
}
if (!(fs->flags & EXT2_FLAG_RW))
return EXT2_ET_RO_FILSYS;
if ((ino == 0) || (ino > fs->super->s_inodes_count))
return EXT2_ET_BAD_INODE_NUM;
length = bufsize;
if (length < EXT2_INODE_SIZE(fs->super))
length = EXT2_INODE_SIZE(fs->super);
if (length > (int) sizeof(struct ext2_inode_large)) {
w_inode = malloc(length);
if (!w_inode)
return ENOMEM;
} else
w_inode = &temp_inode;
memset(w_inode, 0, length);
#ifdef WORDS_BIGENDIAN
ext2fs_swap_inode_full(fs, w_inode,
(struct ext2_inode_large *) inode,
1, bufsize);
#else
memcpy(w_inode, inode, bufsize);
#endif
group = (ino - 1) / EXT2_INODES_PER_GROUP(fs->super);
offset = ((ino - 1) % EXT2_INODES_PER_GROUP(fs->super)) *
EXT2_INODE_SIZE(fs->super);
block = offset >> EXT2_BLOCK_SIZE_BITS(fs->super);
if (!fs->group_desc[(unsigned) group].bg_inode_table) {
retval = EXT2_ET_MISSING_INODE_TABLE;
goto errout;
}
block_nr = fs->group_desc[(unsigned) group].bg_inode_table + block;
offset &= (EXT2_BLOCK_SIZE(fs->super) - 1);
length = EXT2_INODE_SIZE(fs->super);
if (length > bufsize)
length = bufsize;
ptr = (char *) w_inode;
while (length) {
clen = length;
if ((offset + length) > fs->blocksize)
clen = fs->blocksize - offset;
if (fs->icache->buffer_blk != block_nr) {
retval = io_channel_read_blk(fs->io, block_nr, 1,
fs->icache->buffer);
if (retval)
goto errout;
fs->icache->buffer_blk = block_nr;
}
memcpy((char *) fs->icache->buffer + (unsigned) offset,
ptr, clen);
retval = io_channel_write_blk(fs->io, block_nr, 1,
fs->icache->buffer);
if (retval)
goto errout;
offset = 0;
ptr += clen;
length -= clen;
block_nr++;
}
fs->flags |= EXT2_FLAG_CHANGED;
errout:
if (w_inode && w_inode != &temp_inode)
free(w_inode);
return retval;
}
/*
* Remove an external journal from the filesystem
*/
static void remove_journal_device(ext2_filsys fs)
{
char *journal_path;
ext2_filsys jfs;
char buf[1024];
journal_superblock_t *jsb;
int i, nr_users;
errcode_t retval;
int commit_remove_journal = 0;
io_manager io_ptr;
if (f_flag)
commit_remove_journal = 1; /* force removal even if error */
uuid_unparse(fs->super->s_journal_uuid, buf);
journal_path = blkid_get_devname(NULL, "UUID", buf);
if (!journal_path) {
journal_path =
ext2fs_find_block_device(fs->super->s_journal_dev);
if (!journal_path)
return;
}
io_ptr = unix_io_manager;
retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
EXT2_FLAG_JOURNAL_DEV_OK, 0,
fs->blocksize, io_ptr, &jfs);
if (retval) {
bb_error_msg("Failed to open external journal");
goto no_valid_journal;
}
if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
bb_error_msg("%s is not a journal device", journal_path);
goto no_valid_journal;
}
/* Get the journal superblock */
if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
bb_error_msg("Failed to read journal superblock");
goto no_valid_journal;
}
jsb = (journal_superblock_t *) buf;
if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
(jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
bb_error_msg("Journal superblock not found!");
goto no_valid_journal;
}
/* Find the filesystem UUID */
nr_users = ntohl(jsb->s_nr_users);
for (i=0; i < nr_users; i++) {
if (memcmp(fs->super->s_uuid,
&jsb->s_users[i*16], 16) == 0)
break;
}
if (i >= nr_users) {
bb_error_msg("Filesystem's UUID not found on journal device");
commit_remove_journal = 1;
goto no_valid_journal;
}
nr_users--;
for (i=0; i < nr_users; i++)
memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
jsb->s_nr_users = htonl(nr_users);
/* Write back the journal superblock */
if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
bb_error_msg("Failed to write journal superblock");
goto no_valid_journal;
}
commit_remove_journal = 1;
no_valid_journal:
if (commit_remove_journal == 0)
bb_error_msg_and_die("Journal NOT removed");
fs->super->s_journal_dev = 0;
uuid_clear(fs->super->s_journal_uuid);
ext2fs_mark_super_dirty(fs);
puts("Journal removed");
free(journal_path);
}
static void swap_inodes(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
dgrp_t group;
unsigned int i;
ext2_ino_t ino = 1;
char *buf = NULL, *block_buf = NULL;
errcode_t retval;
struct ext2_inode * inode;
e2fsck_use_inode_shortcuts(ctx, 1);
retval = ext2fs_get_array(fs->blocksize, fs->inode_blocks_per_group,
&buf);
if (retval) {
com_err("swap_inodes", retval,
_("while allocating inode buffer"));
ctx->flags |= E2F_FLAG_ABORT;
goto errout;
}
block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
"block interate buffer");
for (group = 0; group < fs->group_desc_count; group++) {
retval = io_channel_read_blk(fs->io,
fs->group_desc[group].bg_inode_table,
fs->inode_blocks_per_group, buf);
if (retval) {
com_err("swap_inodes", retval,
_("while reading inode table (group %d)"),
group);
ctx->flags |= E2F_FLAG_ABORT;
goto errout;
}
inode = (struct ext2_inode *) buf;
for (i=0; i < fs->super->s_inodes_per_group;
i++, ino++, inode++) {
ctx->stashed_ino = ino;
ctx->stashed_inode = inode;
if (fs->flags & EXT2_FLAG_SWAP_BYTES_READ)
ext2fs_swap_inode(fs, inode, inode, 0);
/*
* Skip deleted files.
*/
if (inode->i_links_count == 0)
continue;
if (LINUX_S_ISDIR(inode->i_mode) ||
((inode->i_block[EXT2_IND_BLOCK] ||
inode->i_block[EXT2_DIND_BLOCK] ||
inode->i_block[EXT2_TIND_BLOCK]) &&
ext2fs_inode_has_valid_blocks(inode)))
swap_inode_blocks(ctx, ino, block_buf, inode);
if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
goto errout;
if (fs->flags & EXT2_FLAG_SWAP_BYTES_WRITE)
ext2fs_swap_inode(fs, inode, inode, 1);
}
retval = io_channel_write_blk(fs->io,
fs->group_desc[group].bg_inode_table,
fs->inode_blocks_per_group, buf);
if (retval) {
com_err("swap_inodes", retval,
_("while writing inode table (group %d)"),
group);
ctx->flags |= E2F_FLAG_ABORT;
goto errout;
}
}
errout:
if (buf)
ext2fs_free_mem(&buf);
if (block_buf)
ext2fs_free_mem(&block_buf);
e2fsck_use_inode_shortcuts(ctx, 0);
ext2fs_flush_icache(fs);
}
