[thirdparty/e2fsprogs.git] / lib / ext2fs / bmap.c

/*
 * bmap.c --- logical to physical block mapping
 *
 * Copyright (C) 1997 Theodore Ts'o.
 *
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Library
 * General Public License, version 2.
 * %End-Header%
 */

#include <stdio.h>
#include <string.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <errno.h>

#include "ext2_fs.h"
#include "ext2fs.h"

#if defined(__GNUC__) && !defined(NO_INLINE_FUNCS)
#define _BMAP_INLINE_	__inline__
#else
#define _BMAP_INLINE_
#endif

extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino,
			     struct ext2_inode *inode,
			     char *block_buf, int bmap_flags,
			     blk_t block, blk_t *phys_blk);

#define inode_bmap(inode, nr) ((inode)->i_block[(nr)])

static _BMAP_INLINE_ errcode_t block_ind_bmap(ext2_filsys fs, int flags,
					      blk_t ind, char *block_buf,
					      int *blocks_alloc,
					      blk_t nr, blk_t *ret_blk)
{
	errcode_t	retval;
	blk_t		b;

	if (!ind) {
		if (flags & BMAP_SET)
			return EXT2_ET_SET_BMAP_NO_IND;
		*ret_blk = 0;
		return 0;
	}
	retval = io_channel_read_blk(fs->io, ind, 1, block_buf);
	if (retval)
		return retval;

	if (flags & BMAP_SET) {
		b = *ret_blk;
#ifdef WORDS_BIGENDIAN
		b = ext2fs_swab32(b);
#endif
		((blk_t *) block_buf)[nr] = b;
		return io_channel_write_blk(fs->io, ind, 1, block_buf);
	}

	b = ((blk_t *) block_buf)[nr];

#ifdef WORDS_BIGENDIAN
	b = ext2fs_swab32(b);
#endif

	if (!b && (flags & BMAP_ALLOC)) {
		b = nr ? ((blk_t *) block_buf)[nr-1] : 0;
		retval = ext2fs_alloc_block(fs, b,
					    block_buf + fs->blocksize, &b);
		if (retval)
			return retval;

#ifdef WORDS_BIGENDIAN
		((blk_t *) block_buf)[nr] = ext2fs_swab32(b);
#else
		((blk_t *) block_buf)[nr] = b;
#endif

		retval = io_channel_write_blk(fs->io, ind, 1, block_buf);
		if (retval)
			return retval;

		(*blocks_alloc)++;
	}

	*ret_blk = b;
	return 0;
}

static _BMAP_INLINE_ errcode_t block_dind_bmap(ext2_filsys fs, int flags,
					       blk_t dind, char *block_buf,
					       int *blocks_alloc,
					       blk_t nr, blk_t *ret_blk)
{
	blk_t		b;
	errcode_t	retval;
	blk_t		addr_per_block;

	addr_per_block = (blk_t) fs->blocksize >> 2;

	retval = block_ind_bmap(fs, flags & ~BMAP_SET, dind, block_buf,
				blocks_alloc, nr / addr_per_block, &b);
	if (retval)
		return retval;
	retval = block_ind_bmap(fs, flags, b, block_buf, blocks_alloc,
				nr % addr_per_block, ret_blk);
	return retval;
}

static _BMAP_INLINE_ errcode_t block_tind_bmap(ext2_filsys fs, int flags,
					       blk_t tind, char *block_buf,
					       int *blocks_alloc,
					       blk_t nr, blk_t *ret_blk)
{
	blk_t		b;
	errcode_t	retval;
	blk_t		addr_per_block;

	addr_per_block = (blk_t) fs->blocksize >> 2;

	retval = block_dind_bmap(fs, flags & ~BMAP_SET, tind, block_buf,
				 blocks_alloc, nr / addr_per_block, &b);
	if (retval)
		return retval;
	retval = block_ind_bmap(fs, flags, b, block_buf, blocks_alloc,
				nr % addr_per_block, ret_blk);
	return retval;
}

errcode_t ext2fs_bmap2(ext2_filsys fs, ext2_ino_t ino, struct ext2_inode *inode,
		       char *block_buf, int bmap_flags, blk64_t block,
		       int *ret_flags, blk64_t *phys_blk)
{
	struct ext2_inode inode_buf;
	ext2_extent_handle_t handle = 0;
	blk64_t blk64;
	blk_t addr_per_block;
	blk_t	b, blk32;
	char	*buf = 0;
	errcode_t	retval = 0;
	int		blocks_alloc = 0, inode_dirty = 0;

	if (!(bmap_flags & BMAP_SET))
		*phys_blk = 0;

	if (ret_flags)
		*ret_flags = 0;

	/* Read inode structure if necessary */
	if (!inode) {
		retval = ext2fs_read_inode(fs, ino, &inode_buf);
		if (retval)
			return retval;
		inode = &inode_buf;
	}
	addr_per_block = (blk_t) fs->blocksize >> 2;

	if (inode->i_flags & EXT4_EXTENTS_FL) {
		struct ext2fs_extent	extent;
		unsigned int		offset;

		retval = ext2fs_extent_open2(fs, ino, inode, &handle);
		if (retval)
			goto done;
		if (bmap_flags & BMAP_SET) {
			retval = ext2fs_extent_set_bmap(handle, block,
							*phys_blk, 0);
			goto done;
		}
		retval = ext2fs_extent_goto(handle, block);
		if (retval) {
			/* If the extent is not found, return phys_blk = 0 */
			if (retval == EXT2_ET_EXTENT_NOT_FOUND)
				goto got_block;
			goto done;
		}
		retval = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT, &extent);
		if (retval)
			goto done;
		offset = block - extent.e_lblk;
		if (block >= extent.e_lblk && (offset <= extent.e_len)) {
			*phys_blk = extent.e_pblk + offset;
			if (ret_flags && extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT)
				*ret_flags |= BMAP_RET_UNINIT;
		}
	got_block:
		if ((*phys_blk == 0) && (bmap_flags & BMAP_ALLOC)) {
			retval = ext2fs_bmap2(fs, ino, inode, block_buf,
					      0, block-1, 0, &blk64);
			if (retval)
				blk64 = 0;
			retval = ext2fs_alloc_block2(fs, blk64, block_buf,
						     &blk64);
			if (retval)
				goto done;
			retval = ext2fs_extent_set_bmap(handle, block,
							blk64, 0);
			if (retval)
				goto done;
			/* Update inode after setting extent */
			retval = ext2fs_read_inode(fs, ino, inode);
			if (retval)
				return retval;
			blocks_alloc++;
			*phys_blk = blk64;
		}
		retval = 0;
		goto done;
	}

	if (!block_buf) {
		retval = ext2fs_get_array(2, fs->blocksize, &buf);
		if (retval)
			return retval;
		block_buf = buf;
	}

	if (block < EXT2_NDIR_BLOCKS) {
		if (bmap_flags & BMAP_SET) {
			b = *phys_blk;
			inode_bmap(inode, block) = b;
			inode_dirty++;
			goto done;
		}

		*phys_blk = inode_bmap(inode, block);
		b = block ? inode_bmap(inode, block-1) : 0;

		if ((*phys_blk == 0) && (bmap_flags & BMAP_ALLOC)) {
			retval = ext2fs_alloc_block(fs, b, block_buf, &b);
			if (retval)
				goto done;
			inode_bmap(inode, block) = b;
			blocks_alloc++;
			*phys_blk = b;
		}
		goto done;
	}

	/* Indirect block */
	block -= EXT2_NDIR_BLOCKS;
	blk32 = *phys_blk;
	if (block < addr_per_block) {
		b = inode_bmap(inode, EXT2_IND_BLOCK);
		if (!b) {
			if (!(bmap_flags & BMAP_ALLOC)) {
				if (bmap_flags & BMAP_SET)
					retval = EXT2_ET_SET_BMAP_NO_IND;
				goto done;
			}

			b = inode_bmap(inode, EXT2_IND_BLOCK-1);
 			retval = ext2fs_alloc_block(fs, b, block_buf, &b);
			if (retval)
				goto done;
			inode_bmap(inode, EXT2_IND_BLOCK) = b;
			blocks_alloc++;
		}
		retval = block_ind_bmap(fs, bmap_flags, b, block_buf,
					&blocks_alloc, block, &blk32);
		if (retval == 0)
			*phys_blk = blk32;
		goto done;
	}

	/* Doubly indirect block  */
	block -= addr_per_block;
	if (block < addr_per_block * addr_per_block) {
		b = inode_bmap(inode, EXT2_DIND_BLOCK);
		if (!b) {
			if (!(bmap_flags & BMAP_ALLOC)) {
				if (bmap_flags & BMAP_SET)
					retval = EXT2_ET_SET_BMAP_NO_IND;
				goto done;
			}

			b = inode_bmap(inode, EXT2_IND_BLOCK);
 			retval = ext2fs_alloc_block(fs, b, block_buf, &b);
			if (retval)
				goto done;
			inode_bmap(inode, EXT2_DIND_BLOCK) = b;
			blocks_alloc++;
		}
		retval = block_dind_bmap(fs, bmap_flags, b, block_buf,
					 &blocks_alloc, block, &blk32);
		if (retval == 0)
			*phys_blk = blk32;
		goto done;
	}

	/* Triply indirect block */
	block -= addr_per_block * addr_per_block;
	b = inode_bmap(inode, EXT2_TIND_BLOCK);
	if (!b) {
		if (!(bmap_flags & BMAP_ALLOC)) {
			if (bmap_flags & BMAP_SET)
				retval = EXT2_ET_SET_BMAP_NO_IND;
			goto done;
		}

		b = inode_bmap(inode, EXT2_DIND_BLOCK);
		retval = ext2fs_alloc_block(fs, b, block_buf, &b);
		if (retval)
			goto done;
		inode_bmap(inode, EXT2_TIND_BLOCK) = b;
		blocks_alloc++;
	}
	retval = block_tind_bmap(fs, bmap_flags, b, block_buf,
				 &blocks_alloc, block, &blk32);
	if (retval == 0)
		*phys_blk = blk32;
done:
	if (buf)
		ext2fs_free_mem(&buf);
	if (handle)
		ext2fs_extent_free(handle);
	if ((retval == 0) && (blocks_alloc || inode_dirty)) {
		ext2fs_iblk_add_blocks(fs, inode, blocks_alloc);
		retval = ext2fs_write_inode(fs, ino, inode);
	}
	return retval;
}

errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, struct ext2_inode *inode,
		      char *block_buf, int bmap_flags, blk_t block,
		      blk_t *phys_blk)
{
	errcode_t ret;
	blk64_t	ret_blk = *phys_blk;

	ret = ext2fs_bmap2(fs, ino, inode, block_buf, bmap_flags, block,
			    0, &ret_blk);
	if (ret)
		return ret;
	if (ret_blk >= ((long long) 1 << 32))
		return EOVERFLOW;
	*phys_blk = ret_blk;
	return 0;
}
Commit	Line	Data
30fab293	1	/*
80e808fc	2	* bmap.c --- logical to physical block mapping
30fab293 TT	3	*
	4	* Copyright (C) 1997 Theodore Ts'o.
	5	*
	6	* %Begin-Header%
543547a5 TT	7	* This file may be redistributed under the terms of the GNU Library
543547a5 TT	8	* General Public License, version 2.
30fab293 TT	9	* %End-Header%
	10	*/
	11
	12	#include <stdio.h>
	13	#include <string.h>
	14	#if HAVE_UNISTD_H
	15	#include <unistd.h>
	16	#endif
cc9bf5d2	17	#include <errno.h>
30fab293	18
b5abe6fa	19	#include "ext2_fs.h"
30fab293 TT	20	#include "ext2fs.h"
30fab293 TT	21
78d8f90f	22	#if defined(__GNUC__) && !defined(NO_INLINE_FUNCS)
30fab293 TT	23	#define _BMAP_INLINE_ __inline__
	24	#else
	25	#define _BMAP_INLINE_
	26	#endif
	27
31dbecd4	28	extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino,
efc6f628	29	struct ext2_inode *inode,
30fab293 TT	30	char *block_buf, int bmap_flags,
	31	blk_t block, blk_t *phys_blk);
	32
30fab293 TT	33	#define inode_bmap(inode, nr) ((inode)->i_block[(nr)])
30fab293 TT	34
efc6f628 TT	35	static _BMAP_INLINE_ errcode_t block_ind_bmap(ext2_filsys fs, int flags,
efc6f628 TT	36	blk_t ind, char *block_buf,
30fab293 TT	37	int *blocks_alloc,
	38	blk_t nr, blk_t *ret_blk)
	39	{
	40	errcode_t retval;
	41	blk_t b;
	42
	43	if (!ind) {
1d667534 TT	44	if (flags & BMAP_SET)
1d667534 TT	45	return EXT2_ET_SET_BMAP_NO_IND;
30fab293 TT	46	*ret_blk = 0;
	47	return 0;
	48	}
	49	retval = io_channel_read_blk(fs->io, ind, 1, block_buf);
	50	if (retval)
	51	return retval;
	52
1d667534 TT	53	if (flags & BMAP_SET) {
1d667534 TT	54	b = *ret_blk;
126a291c TT	55	#ifdef WORDS_BIGENDIAN
126a291c TT	56	b = ext2fs_swab32(b);
1d667534 TT	57	#endif
	58	((blk_t *) block_buf)[nr] = b;
	59	return io_channel_write_blk(fs->io, ind, 1, block_buf);
	60	}
	61
30fab293 TT	62	b = ((blk_t *) block_buf)[nr];
30fab293 TT	63
126a291c TT	64	#ifdef WORDS_BIGENDIAN
126a291c TT	65	b = ext2fs_swab32(b);
5df55d7f	66	#endif
30fab293 TT	67
	68	if (!b && (flags & BMAP_ALLOC)) {
	69	b = nr ? ((blk_t *) block_buf)[nr-1] : 0;
	70	retval = ext2fs_alloc_block(fs, b,
	71	block_buf + fs->blocksize, &b);
	72	if (retval)
	73	return retval;
	74
126a291c TT	75	#ifdef WORDS_BIGENDIAN
	76	((blk_t *) block_buf)[nr] = ext2fs_swab32(b);
	77	#else
	78	((blk_t *) block_buf)[nr] = b;
5df55d7f	79	#endif
30fab293 TT	80
	81	retval = io_channel_write_blk(fs->io, ind, 1, block_buf);
	82	if (retval)
	83	return retval;
	84
	85	(*blocks_alloc)++;
	86	}
	87
	88	*ret_blk = b;
	89	return 0;
	90	}
	91
546a1ff1	92	static _BMAP_INLINE_ errcode_t block_dind_bmap(ext2_filsys fs, int flags,
efc6f628	93	blk_t dind, char *block_buf,
30fab293 TT	94	int *blocks_alloc,
	95	blk_t nr, blk_t *ret_blk)
	96	{
	97	blk_t b;
	98	errcode_t retval;
2eb374c9	99	blk_t addr_per_block;
efc6f628	100
2eb374c9	101	addr_per_block = (blk_t) fs->blocksize >> 2;
30fab293	102
efc6f628	103	retval = block_ind_bmap(fs, flags & ~BMAP_SET, dind, block_buf,
1d667534	104	blocks_alloc, nr / addr_per_block, &b);
30fab293 TT	105	if (retval)
	106	return retval;
	107	retval = block_ind_bmap(fs, flags, b, block_buf, blocks_alloc,
	108	nr % addr_per_block, ret_blk);
	109	return retval;
	110	}
	111
546a1ff1	112	static _BMAP_INLINE_ errcode_t block_tind_bmap(ext2_filsys fs, int flags,
efc6f628	113	blk_t tind, char *block_buf,
30fab293 TT	114	int *blocks_alloc,
	115	blk_t nr, blk_t *ret_blk)
	116	{
	117	blk_t b;
	118	errcode_t retval;
2eb374c9	119	blk_t addr_per_block;
efc6f628	120
2eb374c9	121	addr_per_block = (blk_t) fs->blocksize >> 2;
30fab293	122
efc6f628	123	retval = block_dind_bmap(fs, flags & ~BMAP_SET, tind, block_buf,
1d667534	124	blocks_alloc, nr / addr_per_block, &b);
30fab293 TT	125	if (retval)
	126	return retval;
	127	retval = block_ind_bmap(fs, flags, b, block_buf, blocks_alloc,
	128	nr % addr_per_block, ret_blk);
	129	return retval;
	130	}
	131
cc9bf5d2 TT	132	errcode_t ext2fs_bmap2(ext2_filsys fs, ext2_ino_t ino, struct ext2_inode *inode,
	133	char *block_buf, int bmap_flags, blk64_t block,
	134	int ret_flags, blk64_t phys_blk)
30fab293 TT	135	{
30fab293 TT	136	struct ext2_inode inode_buf;
cc9bf5d2	137	ext2_extent_handle_t handle = 0;
062cc472	138	blk64_t blk64;
2eb374c9	139	blk_t addr_per_block;
cc9bf5d2	140	blk_t b, blk32;
30fab293 TT	141	char *buf = 0;
30fab293 TT	142	errcode_t retval = 0;
1d667534	143	int blocks_alloc = 0, inode_dirty = 0;
30fab293	144
1d667534 TT	145	if (!(bmap_flags & BMAP_SET))
1d667534 TT	146	*phys_blk = 0;
30fab293	147
cc9bf5d2 TT	148	if (ret_flags)
	149	*ret_flags = 0;
	150
30fab293 TT	151	/* Read inode structure if necessary */
	152	if (!inode) {
	153	retval = ext2fs_read_inode(fs, ino, &inode_buf);
b38cd283	154	if (retval)
30fab293 TT	155	return retval;
	156	inode = &inode_buf;
	157	}
2eb374c9	158	addr_per_block = (blk_t) fs->blocksize >> 2;
30fab293	159
cc9bf5d2 TT	160	if (inode->i_flags & EXT4_EXTENTS_FL) {
cc9bf5d2 TT	161	struct ext2fs_extent extent;
2d328bb7	162	unsigned int offset;
cc9bf5d2	163
84b239ae	164	retval = ext2fs_extent_open2(fs, ino, inode, &handle);
cc9bf5d2 TT	165	if (retval)
cc9bf5d2 TT	166	goto done;
ec9d6dd3 TT	167	if (bmap_flags & BMAP_SET) {
	168	retval = ext2fs_extent_set_bmap(handle, block,
	169	*phys_blk, 0);
	170	goto done;
	171	}
cc9bf5d2 TT	172	retval = ext2fs_extent_goto(handle, block);
	173	if (retval) {
	174	/* If the extent is not found, return phys_blk = 0 */
	175	if (retval == EXT2_ET_EXTENT_NOT_FOUND)
9033faf5	176	goto got_block;
cc9bf5d2 TT	177	goto done;
	178	}
	179	retval = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT, &extent);
	180	if (retval)
	181	goto done;
	182	offset = block - extent.e_lblk;
	183	if (block >= extent.e_lblk && (offset <= extent.e_len)) {
	184	*phys_blk = extent.e_pblk + offset;
	185	if (ret_flags && extent.e_flags & EXT2_EXTENT_FLAGS_UNINIT)
	186	*ret_flags \|= BMAP_RET_UNINIT;
	187	}
9033faf5	188	got_block:
ec9d6dd3	189	if ((*phys_blk == 0) && (bmap_flags & BMAP_ALLOC)) {
062cc472 TT	190	retval = ext2fs_bmap2(fs, ino, inode, block_buf,
	191	0, block-1, 0, &blk64);
	192	if (retval)
	193	blk64 = 0;
	194	retval = ext2fs_alloc_block2(fs, blk64, block_buf,
	195	&blk64);
ec9d6dd3 TT	196	if (retval)
	197	goto done;
	198	retval = ext2fs_extent_set_bmap(handle, block,
062cc472	199	blk64, 0);
ec9d6dd3 TT	200	if (retval)
ec9d6dd3 TT	201	goto done;
9033faf5 TT	202	/* Update inode after setting extent */
	203	retval = ext2fs_read_inode(fs, ino, inode);
	204	if (retval)
	205	return retval;
ec9d6dd3	206	blocks_alloc++;
062cc472	207	*phys_blk = blk64;
ec9d6dd3	208	}
cc9bf5d2 TT	209	retval = 0;
	210	goto done;
	211	}
	212
30fab293	213	if (!block_buf) {
ee01079a	214	retval = ext2fs_get_array(2, fs->blocksize, &buf);
7b4e4534 TT	215	if (retval)
7b4e4534 TT	216	return retval;
30fab293 TT	217	block_buf = buf;
	218	}
	219
	220	if (block < EXT2_NDIR_BLOCKS) {
1d667534 TT	221	if (bmap_flags & BMAP_SET) {
1d667534 TT	222	b = *phys_blk;
1d667534 TT	223	inode_bmap(inode, block) = b;
	224	inode_dirty++;
	225	goto done;
	226	}
	227
30fab293 TT	228	*phys_blk = inode_bmap(inode, block);
30fab293 TT	229	b = block ? inode_bmap(inode, block-1) : 0;
efc6f628	230
30fab293 TT	231	if ((*phys_blk == 0) && (bmap_flags & BMAP_ALLOC)) {
	232	retval = ext2fs_alloc_block(fs, b, block_buf, &b);
	233	if (retval)
	234	goto done;
	235	inode_bmap(inode, block) = b;
	236	blocks_alloc++;
	237	*phys_blk = b;
	238	}
	239	goto done;
	240	}
efc6f628	241
30fab293 TT	242	/* Indirect block */
30fab293 TT	243	block -= EXT2_NDIR_BLOCKS;
cc9bf5d2	244	blk32 = *phys_blk;
30fab293 TT	245	if (block < addr_per_block) {
	246	b = inode_bmap(inode, EXT2_IND_BLOCK);
	247	if (!b) {
1d667534 TT	248	if (!(bmap_flags & BMAP_ALLOC)) {
	249	if (bmap_flags & BMAP_SET)
	250	retval = EXT2_ET_SET_BMAP_NO_IND;
	251	goto done;
	252	}
30fab293 TT	253
	254	b = inode_bmap(inode, EXT2_IND_BLOCK-1);
	255	retval = ext2fs_alloc_block(fs, b, block_buf, &b);
	256	if (retval)
	257	goto done;
	258	inode_bmap(inode, EXT2_IND_BLOCK) = b;
	259	blocks_alloc++;
	260	}
efc6f628	261	retval = block_ind_bmap(fs, bmap_flags, b, block_buf,
cc9bf5d2 TT	262	&blocks_alloc, block, &blk32);
	263	if (retval == 0)
	264	*phys_blk = blk32;
30fab293 TT	265	goto done;
30fab293 TT	266	}
efc6f628	267
30fab293 TT	268	/* Doubly indirect block */
	269	block -= addr_per_block;
	270	if (block < addr_per_block * addr_per_block) {
	271	b = inode_bmap(inode, EXT2_DIND_BLOCK);
	272	if (!b) {
1d667534 TT	273	if (!(bmap_flags & BMAP_ALLOC)) {
	274	if (bmap_flags & BMAP_SET)
	275	retval = EXT2_ET_SET_BMAP_NO_IND;
	276	goto done;
	277	}
30fab293 TT	278
	279	b = inode_bmap(inode, EXT2_IND_BLOCK);
	280	retval = ext2fs_alloc_block(fs, b, block_buf, &b);
	281	if (retval)
	282	goto done;
	283	inode_bmap(inode, EXT2_DIND_BLOCK) = b;
	284	blocks_alloc++;
	285	}
efc6f628	286	retval = block_dind_bmap(fs, bmap_flags, b, block_buf,
cc9bf5d2 TT	287	&blocks_alloc, block, &blk32);
	288	if (retval == 0)
	289	*phys_blk = blk32;
30fab293 TT	290	goto done;
	291	}
	292
	293	/* Triply indirect block */
	294	block -= addr_per_block * addr_per_block;
	295	b = inode_bmap(inode, EXT2_TIND_BLOCK);
	296	if (!b) {
1d667534 TT	297	if (!(bmap_flags & BMAP_ALLOC)) {
	298	if (bmap_flags & BMAP_SET)
	299	retval = EXT2_ET_SET_BMAP_NO_IND;
30fab293	300	goto done;
1d667534	301	}
30fab293 TT	302
	303	b = inode_bmap(inode, EXT2_DIND_BLOCK);
	304	retval = ext2fs_alloc_block(fs, b, block_buf, &b);
	305	if (retval)
	306	goto done;
	307	inode_bmap(inode, EXT2_TIND_BLOCK) = b;
	308	blocks_alloc++;
	309	}
efc6f628	310	retval = block_tind_bmap(fs, bmap_flags, b, block_buf,
cc9bf5d2 TT	311	&blocks_alloc, block, &blk32);
	312	if (retval == 0)
	313	*phys_blk = blk32;
30fab293 TT	314	done:
30fab293 TT	315	if (buf)
c4e3d3f3	316	ext2fs_free_mem(&buf);
cc9bf5d2 TT	317	if (handle)
cc9bf5d2 TT	318	ext2fs_extent_free(handle);
1d667534	319	if ((retval == 0) && (blocks_alloc \|\| inode_dirty)) {
1ca1059f	320	ext2fs_iblk_add_blocks(fs, inode, blocks_alloc);
30fab293 TT	321	retval = ext2fs_write_inode(fs, ino, inode);
	322	}
	323	return retval;
	324	}
	325
cc9bf5d2 TT	326	errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, struct ext2_inode *inode,
	327	char *block_buf, int bmap_flags, blk_t block,
	328	blk_t *phys_blk)
	329	{
	330	errcode_t ret;
9c9e1d5f	331	blk64_t ret_blk = *phys_blk;
cc9bf5d2 TT	332
	333	ret = ext2fs_bmap2(fs, ino, inode, block_buf, bmap_flags, block,
	334	0, &ret_blk);
	335	if (ret)
	336	return ret;
	337	if (ret_blk >= ((long long) 1 << 32))
	338	return EOVERFLOW;
	339	*phys_blk = ret_blk;
	340	return 0;
	341	}