[thirdparty/u-boot.git] / fs / erofs / data.c

// SPDX-License-Identifier: GPL-2.0+
#include "internal.h"
#include "decompress.h"

static int erofs_map_blocks_flatmode(struct erofs_inode *inode,
				     struct erofs_map_blocks *map,
				     int flags)
{
	int err = 0;
	erofs_blk_t nblocks, lastblk;
	u64 offset = map->m_la;
	struct erofs_inode *vi = inode;
	bool tailendpacking = (vi->datalayout == EROFS_INODE_FLAT_INLINE);

	nblocks = BLK_ROUND_UP(inode->i_size);
	lastblk = nblocks - tailendpacking;

	/* there is no hole in flatmode */
	map->m_flags = EROFS_MAP_MAPPED;

	if (offset < erofs_pos(lastblk)) {
		map->m_pa = erofs_pos(vi->u.i_blkaddr) + map->m_la;
		map->m_plen = erofs_pos(lastblk) - offset;
	} else if (tailendpacking) {
		/* 2 - inode inline B: inode, [xattrs], inline last blk... */
		map->m_pa = iloc(vi->nid) + vi->inode_isize +
			vi->xattr_isize + erofs_blkoff(map->m_la);
		map->m_plen = inode->i_size - offset;

		/* inline data should be located in the same meta block */
		if (erofs_blkoff(map->m_pa) + map->m_plen > erofs_blksiz()) {
			erofs_err("inline data cross block boundary @ nid %" PRIu64,
				  vi->nid);
			DBG_BUGON(1);
			err = -EFSCORRUPTED;
			goto err_out;
		}

		map->m_flags |= EROFS_MAP_META;
	} else {
		erofs_err("internal error @ nid: %" PRIu64 " (size %llu), m_la 0x%" PRIx64,
			  vi->nid, (unsigned long long)inode->i_size, map->m_la);
		DBG_BUGON(1);
		err = -EIO;
		goto err_out;
	}

	map->m_llen = map->m_plen;
err_out:
	return err;
}

int erofs_map_blocks(struct erofs_inode *inode,
		     struct erofs_map_blocks *map, int flags)
{
	struct erofs_inode *vi = inode;
	struct erofs_inode_chunk_index *idx;
	u8 buf[EROFS_MAX_BLOCK_SIZE];
	u64 chunknr;
	unsigned int unit;
	erofs_off_t pos;
	int err = 0;

	map->m_deviceid = 0;
	if (map->m_la >= inode->i_size) {
		/* leave out-of-bound access unmapped */
		map->m_flags = 0;
		map->m_plen = 0;
		goto out;
	}

	if (vi->datalayout != EROFS_INODE_CHUNK_BASED)
		return erofs_map_blocks_flatmode(inode, map, flags);

	if (vi->u.chunkformat & EROFS_CHUNK_FORMAT_INDEXES)
		unit = sizeof(*idx);			/* chunk index */
	else
		unit = EROFS_BLOCK_MAP_ENTRY_SIZE;	/* block map */

	chunknr = map->m_la >> vi->u.chunkbits;
	pos = roundup(iloc(vi->nid) + vi->inode_isize +
		      vi->xattr_isize, unit) + unit * chunknr;

	err = erofs_blk_read(buf, erofs_blknr(pos), 1);
	if (err < 0)
		return -EIO;

	map->m_la = chunknr << vi->u.chunkbits;
	map->m_plen = min_t(erofs_off_t, 1UL << vi->u.chunkbits,
			    roundup(inode->i_size - map->m_la, erofs_blksiz()));

	/* handle block map */
	if (!(vi->u.chunkformat & EROFS_CHUNK_FORMAT_INDEXES)) {
		__le32 *blkaddr = (void *)buf + erofs_blkoff(pos);

		if (le32_to_cpu(*blkaddr) == EROFS_NULL_ADDR) {
			map->m_flags = 0;
		} else {
			map->m_pa = erofs_pos(le32_to_cpu(*blkaddr));
			map->m_flags = EROFS_MAP_MAPPED;
		}
		goto out;
	}
	/* parse chunk indexes */
	idx = (void *)buf + erofs_blkoff(pos);
	switch (le32_to_cpu(idx->blkaddr)) {
	case EROFS_NULL_ADDR:
		map->m_flags = 0;
		break;
	default:
		map->m_deviceid = le16_to_cpu(idx->device_id) &
			sbi.device_id_mask;
		map->m_pa = erofs_pos(le32_to_cpu(idx->blkaddr));
		map->m_flags = EROFS_MAP_MAPPED;
		break;
	}
out:
	map->m_llen = map->m_plen;
	return err;
}

int erofs_map_dev(struct erofs_map_dev *map)
{
	struct erofs_device_info *dif;
	int id;

	if (map->m_deviceid) {
		if (sbi.extra_devices < map->m_deviceid)
			return -ENODEV;
	} else if (sbi.extra_devices) {
		for (id = 0; id < sbi.extra_devices; ++id) {
			erofs_off_t startoff, length;

			dif = sbi.devs + id;
			if (!dif->mapped_blkaddr)
				continue;
			startoff = erofs_pos(dif->mapped_blkaddr);
			length = erofs_pos(dif->blocks);

			if (map->m_pa >= startoff &&
			    map->m_pa < startoff + length) {
				map->m_pa -= startoff;
				break;
			}
		}
	}
	return 0;
}

int erofs_read_one_data(struct erofs_map_blocks *map, char *buffer, u64 offset,
			size_t len)
{
	struct erofs_map_dev mdev;
	int ret;

	mdev = (struct erofs_map_dev) {
		.m_deviceid = map->m_deviceid,
		.m_pa = map->m_pa,
	};
	ret = erofs_map_dev(&mdev);
	if (ret)
		return ret;

	ret = erofs_dev_read(mdev.m_deviceid, buffer, mdev.m_pa + offset, len);
	if (ret < 0)
		return -EIO;
	return 0;
}

static int erofs_read_raw_data(struct erofs_inode *inode, char *buffer,
			       erofs_off_t size, erofs_off_t offset)
{
	struct erofs_map_blocks map = {
		.index = UINT_MAX,
	};
	int ret;
	erofs_off_t ptr = offset;

	while (ptr < offset + size) {
		char *const estart = buffer + ptr - offset;
		erofs_off_t eend, moff = 0;

		map.m_la = ptr;
		ret = erofs_map_blocks(inode, &map, 0);
		if (ret)
			return ret;

		DBG_BUGON(map.m_plen != map.m_llen);

		/* trim extent */
		eend = min(offset + size, map.m_la + map.m_llen);
		DBG_BUGON(ptr < map.m_la);

		if (!(map.m_flags & EROFS_MAP_MAPPED)) {
			if (!map.m_llen) {
				/* reached EOF */
				memset(estart, 0, offset + size - ptr);
				ptr = offset + size;
				continue;
			}
			memset(estart, 0, eend - ptr);
			ptr = eend;
			continue;
		}

		if (ptr > map.m_la) {
			moff = ptr - map.m_la;
			map.m_la = ptr;
		}

		ret = erofs_read_one_data(&map, estart, moff, eend - map.m_la);
		if (ret)
			return ret;
		ptr = eend;
	}
	return 0;
}

int z_erofs_read_one_data(struct erofs_inode *inode,
			  struct erofs_map_blocks *map, char *raw, char *buffer,
			  erofs_off_t skip, erofs_off_t length, bool trimmed)
{
	struct erofs_map_dev mdev;
	int ret = 0;

	if (map->m_flags & EROFS_MAP_FRAGMENT) {
		struct erofs_inode packed_inode = {
			.nid = sbi.packed_nid,
		};

		ret = erofs_read_inode_from_disk(&packed_inode);
		if (ret) {
			erofs_err("failed to read packed inode from disk");
			return ret;
		}

		return erofs_pread(&packed_inode, buffer, length - skip,
				   inode->fragmentoff + skip);
	}

	/* no device id here, thus it will always succeed */
	mdev = (struct erofs_map_dev) {
		.m_pa = map->m_pa,
	};
	ret = erofs_map_dev(&mdev);
	if (ret) {
		DBG_BUGON(1);
		return ret;
	}

	ret = erofs_dev_read(mdev.m_deviceid, raw, mdev.m_pa, map->m_plen);
	if (ret < 0)
		return ret;

	ret = z_erofs_decompress(&(struct z_erofs_decompress_req) {
			.in = raw,
			.out = buffer,
			.decodedskip = skip,
			.interlaced_offset =
				map->m_algorithmformat == Z_EROFS_COMPRESSION_INTERLACED ?
					erofs_blkoff(map->m_la) : 0,
			.inputsize = map->m_plen,
			.decodedlength = length,
			.alg = map->m_algorithmformat,
			.partial_decoding = trimmed ? true :
				!(map->m_flags & EROFS_MAP_FULL_MAPPED) ||
					(map->m_flags & EROFS_MAP_PARTIAL_REF),
			 });
	if (ret < 0)
		return ret;
	return 0;
}

static int z_erofs_read_data(struct erofs_inode *inode, char *buffer,
			     erofs_off_t size, erofs_off_t offset)
{
	erofs_off_t end, length, skip;
	struct erofs_map_blocks map = {
		.index = UINT_MAX,
	};
	bool trimmed;
	unsigned int bufsize = 0;
	char *raw = NULL;
	int ret = 0;

	end = offset + size;
	while (end > offset) {
		map.m_la = end - 1;

		ret = z_erofs_map_blocks_iter(inode, &map, 0);
		if (ret)
			break;

		/*
		 * trim to the needed size if the returned extent is quite
		 * larger than requested, and set up partial flag as well.
		 */
		if (end < map.m_la + map.m_llen) {
			length = end - map.m_la;
			trimmed = true;
		} else {
			DBG_BUGON(end != map.m_la + map.m_llen);
			length = map.m_llen;
			trimmed = false;
		}

		if (map.m_la < offset) {
			skip = offset - map.m_la;
			end = offset;
		} else {
			skip = 0;
			end = map.m_la;
		}

		if (!(map.m_flags & EROFS_MAP_MAPPED)) {
			memset(buffer + end - offset, 0, length);
			end = map.m_la;
			continue;
		}

		if (map.m_plen > bufsize) {
			bufsize = map.m_plen;
			raw = realloc(raw, bufsize);
			if (!raw) {
				ret = -ENOMEM;
				break;
			}
		}

		ret = z_erofs_read_one_data(inode, &map, raw,
					    buffer + end - offset, skip, length,
					    trimmed);
		if (ret < 0)
			break;
	}
	if (raw)
		free(raw);
	return ret < 0 ? ret : 0;
}

int erofs_pread(struct erofs_inode *inode, char *buf,
		erofs_off_t count, erofs_off_t offset)
{
	switch (inode->datalayout) {
	case EROFS_INODE_FLAT_PLAIN:
	case EROFS_INODE_FLAT_INLINE:
	case EROFS_INODE_CHUNK_BASED:
		return erofs_read_raw_data(inode, buf, count, offset);
	case EROFS_INODE_COMPRESSED_FULL:
	case EROFS_INODE_COMPRESSED_COMPACT:
		return z_erofs_read_data(inode, buf, count, offset);
	default:
		break;
	}
	return -EINVAL;
}
Commit	Line	Data
830613f8 HJ	1	// SPDX-License-Identifier: GPL-2.0+
830613f8 HJ	2	#include "internal.h"
65cb7305	3	#include "decompress.h"
830613f8 HJ	4
	5	static int erofs_map_blocks_flatmode(struct erofs_inode *inode,
	6	struct erofs_map_blocks *map,
	7	int flags)
	8	{
	9	int err = 0;
	10	erofs_blk_t nblocks, lastblk;
	11	u64 offset = map->m_la;
	12	struct erofs_inode *vi = inode;
	13	bool tailendpacking = (vi->datalayout == EROFS_INODE_FLAT_INLINE);
	14
3a21e92f	15	nblocks = BLK_ROUND_UP(inode->i_size);
830613f8 HJ	16	lastblk = nblocks - tailendpacking;
	17
	18	/* there is no hole in flatmode */
	19	map->m_flags = EROFS_MAP_MAPPED;
	20
3a21e92f YZ	21	if (offset < erofs_pos(lastblk)) {
	22	map->m_pa = erofs_pos(vi->u.i_blkaddr) + map->m_la;
	23	map->m_plen = erofs_pos(lastblk) - offset;
830613f8 HJ	24	} else if (tailendpacking) {
	25	/* 2 - inode inline B: inode, [xattrs], inline last blk... */
	26	map->m_pa = iloc(vi->nid) + vi->inode_isize +
	27	vi->xattr_isize + erofs_blkoff(map->m_la);
	28	map->m_plen = inode->i_size - offset;
	29
3a21e92f YZ	30	/* inline data should be located in the same meta block */
3a21e92f YZ	31	if (erofs_blkoff(map->m_pa) + map->m_plen > erofs_blksiz()) {
830613f8 HJ	32	erofs_err("inline data cross block boundary @ nid %" PRIu64,
	33	vi->nid);
	34	DBG_BUGON(1);
	35	err = -EFSCORRUPTED;
	36	goto err_out;
	37	}
	38
	39	map->m_flags \|= EROFS_MAP_META;
	40	} else {
	41	erofs_err("internal error @ nid: %" PRIu64 " (size %llu), m_la 0x%" PRIx64,
	42	vi->nid, (unsigned long long)inode->i_size, map->m_la);
	43	DBG_BUGON(1);
	44	err = -EIO;
	45	goto err_out;
	46	}
	47
	48	map->m_llen = map->m_plen;
	49	err_out:
	50	return err;
	51	}
	52
	53	int erofs_map_blocks(struct erofs_inode *inode,
	54	struct erofs_map_blocks *map, int flags)
	55	{
	56	struct erofs_inode *vi = inode;
	57	struct erofs_inode_chunk_index *idx;
3a21e92f	58	u8 buf[EROFS_MAX_BLOCK_SIZE];
830613f8 HJ	59	u64 chunknr;
	60	unsigned int unit;
	61	erofs_off_t pos;
	62	int err = 0;
	63
	64	map->m_deviceid = 0;
	65	if (map->m_la >= inode->i_size) {
	66	/* leave out-of-bound access unmapped */
	67	map->m_flags = 0;
	68	map->m_plen = 0;
	69	goto out;
	70	}
	71
	72	if (vi->datalayout != EROFS_INODE_CHUNK_BASED)
	73	return erofs_map_blocks_flatmode(inode, map, flags);
	74
	75	if (vi->u.chunkformat & EROFS_CHUNK_FORMAT_INDEXES)
	76	unit = sizeof(idx); / chunk index */
	77	else
	78	unit = EROFS_BLOCK_MAP_ENTRY_SIZE; /* block map */
	79
	80	chunknr = map->m_la >> vi->u.chunkbits;
	81	pos = roundup(iloc(vi->nid) + vi->inode_isize +
	82	vi->xattr_isize, unit) + unit * chunknr;
	83
	84	err = erofs_blk_read(buf, erofs_blknr(pos), 1);
	85	if (err < 0)
	86	return -EIO;
	87
	88	map->m_la = chunknr << vi->u.chunkbits;
	89	map->m_plen = min_t(erofs_off_t, 1UL << vi->u.chunkbits,
3a21e92f	90	roundup(inode->i_size - map->m_la, erofs_blksiz()));
830613f8 HJ	91
	92	/* handle block map */
	93	if (!(vi->u.chunkformat & EROFS_CHUNK_FORMAT_INDEXES)) {
	94	__le32 blkaddr = (void )buf + erofs_blkoff(pos);
	95
	96	if (le32_to_cpu(*blkaddr) == EROFS_NULL_ADDR) {
	97	map->m_flags = 0;
	98	} else {
3a21e92f	99	map->m_pa = erofs_pos(le32_to_cpu(*blkaddr));
830613f8 HJ	100	map->m_flags = EROFS_MAP_MAPPED;
	101	}
	102	goto out;
	103	}
	104	/* parse chunk indexes */
	105	idx = (void *)buf + erofs_blkoff(pos);
	106	switch (le32_to_cpu(idx->blkaddr)) {
	107	case EROFS_NULL_ADDR:
	108	map->m_flags = 0;
	109	break;
	110	default:
	111	map->m_deviceid = le16_to_cpu(idx->device_id) &
	112	sbi.device_id_mask;
3a21e92f	113	map->m_pa = erofs_pos(le32_to_cpu(idx->blkaddr));
830613f8 HJ	114	map->m_flags = EROFS_MAP_MAPPED;
	115	break;
	116	}
	117	out:
	118	map->m_llen = map->m_plen;
	119	return err;
	120	}
	121
3a21e92f	122	int erofs_map_dev(struct erofs_map_dev *map)
830613f8 HJ	123	{
	124	struct erofs_device_info *dif;
	125	int id;
	126
	127	if (map->m_deviceid) {
3a21e92f	128	if (sbi.extra_devices < map->m_deviceid)
830613f8	129	return -ENODEV;
3a21e92f YZ	130	} else if (sbi.extra_devices) {
3a21e92f YZ	131	for (id = 0; id < sbi.extra_devices; ++id) {
830613f8 HJ	132	erofs_off_t startoff, length;
830613f8 HJ	133
3a21e92f	134	dif = sbi.devs + id;
830613f8 HJ	135	if (!dif->mapped_blkaddr)
830613f8 HJ	136	continue;
3a21e92f YZ	137	startoff = erofs_pos(dif->mapped_blkaddr);
3a21e92f YZ	138	length = erofs_pos(dif->blocks);
830613f8 HJ	139
	140	if (map->m_pa >= startoff &&
	141	map->m_pa < startoff + length) {
	142	map->m_pa -= startoff;
	143	break;
	144	}
	145	}
	146	}
	147	return 0;
	148	}
	149
3a21e92f YZ	150	int erofs_read_one_data(struct erofs_map_blocks map, char buffer, u64 offset,
	151	size_t len)
	152	{
	153	struct erofs_map_dev mdev;
	154	int ret;
	155
	156	mdev = (struct erofs_map_dev) {
	157	.m_deviceid = map->m_deviceid,
	158	.m_pa = map->m_pa,
	159	};
	160	ret = erofs_map_dev(&mdev);
	161	if (ret)
	162	return ret;
	163
	164	ret = erofs_dev_read(mdev.m_deviceid, buffer, mdev.m_pa + offset, len);
	165	if (ret < 0)
	166	return -EIO;
	167	return 0;
	168	}
	169
830613f8 HJ	170	static int erofs_read_raw_data(struct erofs_inode inode, char buffer,
	171	erofs_off_t size, erofs_off_t offset)
	172	{
	173	struct erofs_map_blocks map = {
	174	.index = UINT_MAX,
	175	};
830613f8 HJ	176	int ret;
	177	erofs_off_t ptr = offset;
	178
	179	while (ptr < offset + size) {
	180	char *const estart = buffer + ptr - offset;
3a21e92f	181	erofs_off_t eend, moff = 0;
830613f8 HJ	182
	183	map.m_la = ptr;
	184	ret = erofs_map_blocks(inode, &map, 0);
	185	if (ret)
	186	return ret;
	187
	188	DBG_BUGON(map.m_plen != map.m_llen);
	189
830613f8 HJ	190	/* trim extent */
	191	eend = min(offset + size, map.m_la + map.m_llen);
	192	DBG_BUGON(ptr < map.m_la);
	193
	194	if (!(map.m_flags & EROFS_MAP_MAPPED)) {
	195	if (!map.m_llen) {
	196	/* reached EOF */
	197	memset(estart, 0, offset + size - ptr);
	198	ptr = offset + size;
	199	continue;
	200	}
	201	memset(estart, 0, eend - ptr);
	202	ptr = eend;
	203	continue;
	204	}
	205
	206	if (ptr > map.m_la) {
3a21e92f	207	moff = ptr - map.m_la;
830613f8 HJ	208	map.m_la = ptr;
	209	}
	210
3a21e92f YZ	211	ret = erofs_read_one_data(&map, estart, moff, eend - map.m_la);
	212	if (ret)
	213	return ret;
830613f8 HJ	214	ptr = eend;
	215	}
	216	return 0;
	217	}
	218
3a21e92f YZ	219	int z_erofs_read_one_data(struct erofs_inode *inode,
	220	struct erofs_map_blocks map, char raw, char *buffer,
	221	erofs_off_t skip, erofs_off_t length, bool trimmed)
	222	{
	223	struct erofs_map_dev mdev;
	224	int ret = 0;
	225
	226	if (map->m_flags & EROFS_MAP_FRAGMENT) {
	227	struct erofs_inode packed_inode = {
	228	.nid = sbi.packed_nid,
	229	};
	230
	231	ret = erofs_read_inode_from_disk(&packed_inode);
	232	if (ret) {
	233	erofs_err("failed to read packed inode from disk");
	234	return ret;
	235	}
	236
	237	return erofs_pread(&packed_inode, buffer, length - skip,
	238	inode->fragmentoff + skip);
	239	}
	240
	241	/* no device id here, thus it will always succeed */
	242	mdev = (struct erofs_map_dev) {
	243	.m_pa = map->m_pa,
	244	};
	245	ret = erofs_map_dev(&mdev);
	246	if (ret) {
	247	DBG_BUGON(1);
	248	return ret;
	249	}
	250
	251	ret = erofs_dev_read(mdev.m_deviceid, raw, mdev.m_pa, map->m_plen);
	252	if (ret < 0)
	253	return ret;
	254
	255	ret = z_erofs_decompress(&(struct z_erofs_decompress_req) {
	256	.in = raw,
	257	.out = buffer,
	258	.decodedskip = skip,
	259	.interlaced_offset =
	260	map->m_algorithmformat == Z_EROFS_COMPRESSION_INTERLACED ?
	261	erofs_blkoff(map->m_la) : 0,
	262	.inputsize = map->m_plen,
	263	.decodedlength = length,
	264	.alg = map->m_algorithmformat,
	265	.partial_decoding = trimmed ? true :
	266	!(map->m_flags & EROFS_MAP_FULL_MAPPED) \|\|
	267	(map->m_flags & EROFS_MAP_PARTIAL_REF),
	268	});
	269	if (ret < 0)
	270	return ret;
	271	return 0;
	272	}
	273
65cb7305 HJ	274	static int z_erofs_read_data(struct erofs_inode inode, char buffer,
	275	erofs_off_t size, erofs_off_t offset)
	276	{
	277	erofs_off_t end, length, skip;
	278	struct erofs_map_blocks map = {
	279	.index = UINT_MAX,
	280	};
3a21e92f	281	bool trimmed;
65cb7305 HJ	282	unsigned int bufsize = 0;
	283	char *raw = NULL;
	284	int ret = 0;
	285
	286	end = offset + size;
	287	while (end > offset) {
	288	map.m_la = end - 1;
	289
	290	ret = z_erofs_map_blocks_iter(inode, &map, 0);
	291	if (ret)
	292	break;
	293
65cb7305 HJ	294	/*
	295	* trim to the needed size if the returned extent is quite
	296	* larger than requested, and set up partial flag as well.
	297	*/
	298	if (end < map.m_la + map.m_llen) {
	299	length = end - map.m_la;
3a21e92f	300	trimmed = true;
65cb7305 HJ	301	} else {
	302	DBG_BUGON(end != map.m_la + map.m_llen);
	303	length = map.m_llen;
3a21e92f	304	trimmed = false;
65cb7305 HJ	305	}
	306
	307	if (map.m_la < offset) {
	308	skip = offset - map.m_la;
	309	end = offset;
	310	} else {
	311	skip = 0;
	312	end = map.m_la;
	313	}
	314
	315	if (!(map.m_flags & EROFS_MAP_MAPPED)) {
	316	memset(buffer + end - offset, 0, length);
	317	end = map.m_la;
	318	continue;
	319	}
	320
	321	if (map.m_plen > bufsize) {
	322	bufsize = map.m_plen;
	323	raw = realloc(raw, bufsize);
	324	if (!raw) {
	325	ret = -ENOMEM;
	326	break;
	327	}
	328	}
65cb7305	329
3a21e92f YZ	330	ret = z_erofs_read_one_data(inode, &map, raw,
	331	buffer + end - offset, skip, length,
	332	trimmed);
65cb7305 HJ	333	if (ret < 0)
	334	break;
	335	}
	336	if (raw)
	337	free(raw);
	338	return ret < 0 ? ret : 0;
	339	}
	340
830613f8 HJ	341	int erofs_pread(struct erofs_inode inode, char buf,
	342	erofs_off_t count, erofs_off_t offset)
	343	{
	344	switch (inode->datalayout) {
	345	case EROFS_INODE_FLAT_PLAIN:
	346	case EROFS_INODE_FLAT_INLINE:
	347	case EROFS_INODE_CHUNK_BASED:
	348	return erofs_read_raw_data(inode, buf, count, offset);
3a21e92f YZ	349	case EROFS_INODE_COMPRESSED_FULL:
3a21e92f YZ	350	case EROFS_INODE_COMPRESSED_COMPACT:
65cb7305	351	return z_erofs_read_data(inode, buf, count, offset);
830613f8 HJ	352	default:
	353	break;
	354	}
	355	return -EINVAL;
	356	}