+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2011 - 2012 Samsung Electronics
* EXT4 filesystem implementation in Uboot by
* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
*
* ext4write : Based on generic ext4 protocol.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <ext_common.h>
#include <ext4fs.h>
-#include <inttypes.h>
#include <malloc.h>
#include <memalign.h>
#include <stddef.h>
static inline void ext4fs_sb_free_blocks_dec(struct ext2_sblock *sb)
{
- sb->free_blocks = cpu_to_le32(le32_to_cpu(sb->free_blocks) - 1);
+ uint64_t free_blocks = le32_to_cpu(sb->free_blocks);
+ free_blocks += (uint64_t)le32_to_cpu(sb->free_blocks_high) << 32;
+ free_blocks--;
+
+ sb->free_blocks = cpu_to_le32(free_blocks & 0xffffffff);
+ sb->free_blocks_high = cpu_to_le16(free_blocks >> 32);
}
-static inline void ext4fs_bg_free_inodes_dec(struct ext2_block_group *bg)
+static inline void ext4fs_bg_free_inodes_dec
+ (struct ext2_block_group *bg, const struct ext_filesystem *fs)
{
- bg->free_inodes = cpu_to_le16(le16_to_cpu(bg->free_inodes) - 1);
+ uint32_t free_inodes = le16_to_cpu(bg->free_inodes);
+ if (fs->gdsize == 64)
+ free_inodes += le16_to_cpu(bg->free_inodes_high) << 16;
+ free_inodes--;
+
+ bg->free_inodes = cpu_to_le16(free_inodes & 0xffff);
+ if (fs->gdsize == 64)
+ bg->free_inodes_high = cpu_to_le16(free_inodes >> 16);
}
-static inline void ext4fs_bg_free_blocks_dec(struct ext2_block_group *bg)
+static inline void ext4fs_bg_free_blocks_dec
+ (struct ext2_block_group *bg, const struct ext_filesystem *fs)
{
- bg->free_blocks = cpu_to_le16(le16_to_cpu(bg->free_blocks) - 1);
+ uint32_t free_blocks = le16_to_cpu(bg->free_blocks);
+ if (fs->gdsize == 64)
+ free_blocks += le16_to_cpu(bg->free_blocks_high) << 16;
+ free_blocks--;
+
+ bg->free_blocks = cpu_to_le16(free_blocks & 0xffff);
+ if (fs->gdsize == 64)
+ bg->free_blocks_high = cpu_to_le16(free_blocks >> 16);
}
-static inline void ext4fs_bg_itable_unused_dec(struct ext2_block_group *bg)
+static inline void ext4fs_bg_itable_unused_dec
+ (struct ext2_block_group *bg, const struct ext_filesystem *fs)
{
- bg->bg_itable_unused = cpu_to_le16(le16_to_cpu(bg->bg_itable_unused) - 1);
+ uint32_t free_inodes = le16_to_cpu(bg->bg_itable_unused);
+ if (fs->gdsize == 64)
+ free_inodes += le16_to_cpu(bg->bg_itable_unused_high) << 16;
+ free_inodes--;
+
+ bg->bg_itable_unused = cpu_to_le16(free_inodes & 0xffff);
+ if (fs->gdsize == 64)
+ bg->bg_itable_unused_high = cpu_to_le16(free_inodes >> 16);
}
uint64_t ext4fs_sb_get_free_blocks(const struct ext2_sblock *sb)
return res;
}
-void put_ext4(uint64_t off, void *buf, uint32_t size)
+void put_ext4(uint64_t off, const void *buf, uint32_t size)
{
uint64_t startblock;
uint64_t remainder;
if ((startblock + (size >> log2blksz)) >
(part_offset + fs->total_sect)) {
printf("part_offset is " LBAFU "\n", part_offset);
- printf("total_sector is %" PRIu64 "\n", fs->total_sect);
+ printf("total_sector is %llu\n", fs->total_sect);
printf("error: overflow occurs\n");
return;
}
crc = ext2fs_crc16(crc, desc, offset);
offset += sizeof(desc->bg_checksum); /* skip checksum */
assert(offset == sizeof(*desc));
+ if (offset < fs->gdsize) {
+ crc = ext2fs_crc16(crc, (__u8 *)desc + offset,
+ fs->gdsize - offset);
+ }
}
return crc;
restart_read:
/* read the block no allocated to a file */
- first_block_no_of_root = read_allocated_block(g_parent_inode, blk_idx);
+ first_block_no_of_root = read_allocated_block(g_parent_inode, blk_idx,
+ NULL);
if (first_block_no_of_root <= 0)
goto fail;
g_parent_inode->size = cpu_to_le32(new_size);
new_blockcnt = le32_to_cpu(g_parent_inode->blockcnt);
- new_blockcnt += fs->sect_perblk;
+ new_blockcnt += fs->blksz >> LOG2_SECTOR_SIZE;
g_parent_inode->blockcnt = cpu_to_le32(new_blockcnt);
if (ext4fs_put_metadata
dir->direntlen = cpu_to_le16(fs->blksz - totalbytes);
dir->namelen = strlen(filename);
- dir->filetype = FILETYPE_REG; /* regular file */
+ dir->filetype = file_type;
temp_dir = (char *)dir;
temp_dir = temp_dir + sizeof(struct ext2_dirent);
memcpy(temp_dir, filename, strlen(filename));
/* get the block no allocated to a file */
for (blk_idx = 0; blk_idx < directory_blocks; blk_idx++) {
- blknr = read_allocated_block(parent_inode, blk_idx);
+ blknr = read_allocated_block(parent_inode, blk_idx, NULL);
if (blknr <= 0)
goto fail;
offset = 0;
do {
+ if (offset & 3) {
+ printf("Badly aligned ext2_dirent\n");
+ break;
+ }
+
dir = (struct ext2_dirent *)(block_buffer + offset);
direntname = (char*)(dir) + sizeof(struct ext2_dirent);
static int unlink_filename(char *filename, unsigned int blknr)
{
- int totalbytes = 0;
- int templength = 0;
- int status, inodeno;
- int found = 0;
- char *root_first_block_buffer = NULL;
+ int status;
+ int inodeno = 0;
+ int offset;
+ char *block_buffer = NULL;
struct ext2_dirent *dir = NULL;
- struct ext2_dirent *previous_dir = NULL;
- char *ptr = NULL;
+ struct ext2_dirent *previous_dir;
struct ext_filesystem *fs = get_fs();
int ret = -1;
+ char *direntname;
- /* get the first block of root */
- root_first_block_buffer = zalloc(fs->blksz);
- if (!root_first_block_buffer)
+ block_buffer = zalloc(fs->blksz);
+ if (!block_buffer)
return -ENOMEM;
+
+ /* read the directory block */
status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
- fs->blksz, root_first_block_buffer);
+ fs->blksz, block_buffer);
if (status == 0)
goto fail;
- if (ext4fs_log_journal(root_first_block_buffer, blknr))
- goto fail;
- dir = (struct ext2_dirent *)root_first_block_buffer;
- ptr = (char *)dir;
- totalbytes = 0;
- while (le16_to_cpu(dir->direntlen) >= 0) {
- /*
- * blocksize-totalbytes because last
- * directory length i.e., *dir->direntlen
- * is free availble space in the block that
- * means it is a last entry of directory entry
- */
+ offset = 0;
+ do {
+ if (offset & 3) {
+ printf("Badly aligned ext2_dirent\n");
+ break;
+ }
+
+ previous_dir = dir;
+ dir = (struct ext2_dirent *)(block_buffer + offset);
+ direntname = (char *)(dir) + sizeof(struct ext2_dirent);
+
+ int direntlen = le16_to_cpu(dir->direntlen);
+ if (direntlen < sizeof(struct ext2_dirent))
+ break;
+
if (dir->inode && (strlen(filename) == dir->namelen) &&
- (strncmp(ptr + sizeof(struct ext2_dirent),
- filename, dir->namelen) == 0)) {
- printf("file found, deleting\n");
+ (strncmp(direntname, filename, dir->namelen) == 0)) {
inodeno = le32_to_cpu(dir->inode);
- if (previous_dir) {
- uint16_t new_len;
- new_len = le16_to_cpu(previous_dir->direntlen);
- new_len += le16_to_cpu(dir->direntlen);
- previous_dir->direntlen = cpu_to_le16(new_len);
- } else {
- dir->inode = 0;
- }
- found = 1;
break;
}
- if (fs->blksz - totalbytes == le16_to_cpu(dir->direntlen))
- break;
+ offset += direntlen;
- /* traversing the each directory entry */
- templength = le16_to_cpu(dir->direntlen);
- totalbytes = totalbytes + templength;
- previous_dir = dir;
- dir = (struct ext2_dirent *)((char *)dir + templength);
- ptr = (char *)dir;
- }
+ } while (offset < fs->blksz);
+ if (inodeno > 0) {
+ printf("file found, deleting\n");
+ if (ext4fs_log_journal(block_buffer, blknr))
+ goto fail;
- if (found == 1) {
- if (ext4fs_put_metadata(root_first_block_buffer, blknr))
+ if (previous_dir) {
+ /* merge dir entry with predecessor */
+ uint16_t new_len;
+ new_len = le16_to_cpu(previous_dir->direntlen);
+ new_len += le16_to_cpu(dir->direntlen);
+ previous_dir->direntlen = cpu_to_le16(new_len);
+ } else {
+ /* invalidate dir entry */
+ dir->inode = 0;
+ }
+ if (ext4fs_put_metadata(block_buffer, blknr))
goto fail;
ret = inodeno;
}
fail:
- free(root_first_block_buffer);
+ free(block_buffer);
return ret;
}
/* read the block no allocated to a file */
for (blk_idx = 0; blk_idx < directory_blocks; blk_idx++) {
- blknr = read_allocated_block(g_parent_inode, blk_idx);
+ blknr = read_allocated_block(g_parent_inode, blk_idx, NULL);
if (blknr <= 0)
break;
inodeno = unlink_filename(filename, blknr);
fs->curr_blkno = fs->curr_blkno +
(i * fs->blksz * 8);
fs->first_pass_bbmap++;
- ext4fs_bg_free_blocks_dec(bgd);
+ ext4fs_bg_free_blocks_dec(bgd, fs);
ext4fs_sb_free_blocks_dec(fs->sb);
status = ext4fs_devread(b_bitmap_blk *
fs->sect_perblk,
prev_bg_bitmap_index = bg_idx;
}
- ext4fs_bg_free_blocks_dec(bgd);
+ ext4fs_bg_free_blocks_dec(bgd, fs);
ext4fs_sb_free_blocks_dec(fs->sb);
goto success;
}
fs->curr_inode_no = fs->curr_inode_no +
(i * inodes_per_grp);
fs->first_pass_ibmap++;
- ext4fs_bg_free_inodes_dec(bgd);
+ ext4fs_bg_free_inodes_dec(bgd, fs);
if (has_gdt_chksum)
- ext4fs_bg_itable_unused_dec(bgd);
+ ext4fs_bg_itable_unused_dec(bgd, fs);
ext4fs_sb_free_inodes_dec(fs->sb);
status = ext4fs_devread(i_bitmap_blk *
fs->sect_perblk,
goto fail;
prev_inode_bitmap_index = ibmap_idx;
}
- ext4fs_bg_free_inodes_dec(bgd);
+ ext4fs_bg_free_inodes_dec(bgd, fs);
if (has_gdt_chksum)
bgd->bg_itable_unused = bgd->free_inodes;
ext4fs_sb_free_inodes_dec(fs->sb);
#endif
static struct ext4_extent_header *ext4fs_get_extent_block
- (struct ext2_data *data, char *buf,
+ (struct ext2_data *data, struct ext_block_cache *cache,
struct ext4_extent_header *ext_block,
uint32_t fileblock, int log2_blksz)
{
break;
} while (fileblock >= le32_to_cpu(index[i].ei_block));
- if (--i < 0)
- return NULL;
+ /*
+ * If first logical block number is higher than requested fileblock,
+ * it is a sparse file. This is handled on upper layer.
+ */
+ if (i > 0)
+ i--;
block = le16_to_cpu(index[i].ei_leaf_hi);
block = (block << 32) + le32_to_cpu(index[i].ei_leaf_lo);
-
- if (ext4fs_devread((lbaint_t)block << log2_blksz, 0, blksz,
- buf))
- ext_block = (struct ext4_extent_header *)buf;
- else
+ block <<= log2_blksz;
+ if (!ext_cache_read(cache, (lbaint_t)block, blksz))
return NULL;
+ ext_block = (struct ext4_extent_header *)cache->buf;
}
}
int log2blksz = get_fs()->dev_desc->log2blksz;
int desc_size = get_fs()->gdsize;
+ if (desc_size == 0)
+ return 0;
desc_per_blk = EXT2_BLOCK_SIZE(data) / desc_size;
+ if (desc_per_blk == 0)
+ return 0;
blkno = le32_to_cpu(data->sblock.first_data_block) + 1 +
group / desc_per_blk;
blkoff = (group % desc_per_blk) * desc_size;
int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode)
{
- struct ext2_block_group blkgrp;
+ struct ext2_block_group *blkgrp;
struct ext2_sblock *sblock = &data->sblock;
struct ext_filesystem *fs = get_fs();
int log2blksz = get_fs()->dev_desc->log2blksz;
long int blkno;
unsigned int blkoff;
+ /* Allocate blkgrp based on gdsize (for 64-bit support). */
+ blkgrp = zalloc(get_fs()->gdsize);
+ if (!blkgrp)
+ return 0;
+
/* It is easier to calculate if the first inode is 0. */
ino--;
+ if ( le32_to_cpu(sblock->inodes_per_group) == 0 || fs->inodesz == 0) {
+ free(blkgrp);
+ return 0;
+ }
status = ext4fs_blockgroup(data, ino / le32_to_cpu
- (sblock->inodes_per_group), &blkgrp);
- if (status == 0)
+ (sblock->inodes_per_group), blkgrp);
+ if (status == 0) {
+ free(blkgrp);
return 0;
+ }
inodes_per_block = EXT2_BLOCK_SIZE(data) / fs->inodesz;
- blkno = ext4fs_bg_get_inode_table_id(&blkgrp, fs) +
+ if ( inodes_per_block == 0 ) {
+ free(blkgrp);
+ return 0;
+ }
+ blkno = ext4fs_bg_get_inode_table_id(blkgrp, fs) +
(ino % le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block;
blkoff = (ino % inodes_per_block) * fs->inodesz;
+
+ /* Free blkgrp as it is no longer required. */
+ free(blkgrp);
+
/* Read the inode. */
status = ext4fs_devread((lbaint_t)blkno << (LOG2_BLOCK_SIZE(data) -
log2blksz), blkoff,
return 1;
}
-long int read_allocated_block(struct ext2_inode *inode, int fileblock)
+long int read_allocated_block(struct ext2_inode *inode, int fileblock,
+ struct ext_block_cache *cache)
{
long int blknr;
int blksz;
- get_fs()->dev_desc->log2blksz;
if (le32_to_cpu(inode->flags) & EXT4_EXTENTS_FL) {
- char *buf = zalloc(blksz);
- if (!buf)
- return -ENOMEM;
+ long int startblock, endblock;
+ struct ext_block_cache *c, cd;
struct ext4_extent_header *ext_block;
struct ext4_extent *extent;
- int i = -1;
+ int i;
+
+ if (cache) {
+ c = cache;
+ } else {
+ c = &cd;
+ ext_cache_init(c);
+ }
ext_block =
- ext4fs_get_extent_block(ext4fs_root, buf,
+ ext4fs_get_extent_block(ext4fs_root, c,
(struct ext4_extent_header *)
inode->b.blocks.dir_blocks,
fileblock, log2_blksz);
if (!ext_block) {
printf("invalid extent block\n");
- free(buf);
+ if (!cache)
+ ext_cache_fini(c);
return -EINVAL;
}
extent = (struct ext4_extent *)(ext_block + 1);
- do {
- i++;
- if (i >= le16_to_cpu(ext_block->eh_entries))
- break;
- } while (fileblock >= le32_to_cpu(extent[i].ee_block));
- if (--i >= 0) {
- fileblock -= le32_to_cpu(extent[i].ee_block);
- if (fileblock >= le16_to_cpu(extent[i].ee_len)) {
- free(buf);
+ for (i = 0; i < le16_to_cpu(ext_block->eh_entries); i++) {
+ startblock = le32_to_cpu(extent[i].ee_block);
+ endblock = startblock + le16_to_cpu(extent[i].ee_len);
+
+ if (startblock > fileblock) {
+ /* Sparse file */
+ if (!cache)
+ ext_cache_fini(c);
return 0;
- }
- start = le16_to_cpu(extent[i].ee_start_hi);
- start = (start << 32) +
+ } else if (fileblock < endblock) {
+ start = le16_to_cpu(extent[i].ee_start_hi);
+ start = (start << 32) +
le32_to_cpu(extent[i].ee_start_lo);
- free(buf);
- return fileblock + start;
+ if (!cache)
+ ext_cache_fini(c);
+ return (fileblock - startblock) + start;
+ }
}
- printf("Extent Error\n");
- free(buf);
- return -1;
+ if (!cache)
+ ext_cache_fini(c);
+ return 0;
}
/* Direct blocks. */
/* Make sure this is an ext2 filesystem. */
if (le16_to_cpu(data->sblock.magic) != EXT2_MAGIC)
- goto fail;
+ goto fail_noerr;
- /*
- * The 64bit feature was enabled when metadata_csum was enabled
- * and we do not support metadata_csum (and cannot reliably find
- * files when it is set. Refuse to mount.
- */
- if (le32_to_cpu(data->sblock.feature_incompat) & EXT4_FEATURE_INCOMPAT_64BIT) {
- printf("Unsupported feature found (64bit, possibly metadata_csum), not mounting\n");
- goto fail;
- }
if (le32_to_cpu(data->sblock.revision_level) == 0) {
fs->inodesz = 128;
+ fs->gdsize = 32;
} else {
debug("EXT4 features COMPAT: %08x INCOMPAT: %08x RO_COMPAT: %08x\n",
__le32_to_cpu(data->sblock.feature_compatibility),
return 1;
fail:
printf("Failed to mount ext2 filesystem...\n");
+fail_noerr:
free(data);
ext4fs_root = NULL;
projects / oweals / u-boot.git / blobdiff