int ext4_fs_init(struct ext4_fs *fs, struct ext4_blockdev *bdev)
{
- int r, i;
- uint16_t tmp;
- uint32_t bsize;
- bool read_only = false;
+ int r, i;
+ uint16_t tmp;
+ uint32_t bsize;
+ bool read_only = false;
- ext4_assert(fs && bdev);
+ ext4_assert(fs && bdev);
- fs->bdev = bdev;
+ fs->bdev = bdev;
- r = ext4_sb_read(fs->bdev, &fs->sb);
- if (r != EOK)
- return r;
+ r = ext4_sb_read(fs->bdev, &fs->sb);
+ if (r != EOK)
+ return r;
- if (!ext4_sb_check(&fs->sb))
- return ENOTSUP;
+ if (!ext4_sb_check(&fs->sb))
+ return ENOTSUP;
- bsize = ext4_sb_get_block_size(&fs->sb);
- if (bsize > EXT4_MAX_BLOCK_SIZE)
- return ENXIO;
+ bsize = ext4_sb_get_block_size(&fs->sb);
+ if (bsize > EXT4_MAX_BLOCK_SIZE)
+ return ENXIO;
- r = ext4_fs_check_features(fs, &read_only);
- if (r != EOK)
- return r;
+ r = ext4_fs_check_features(fs, &read_only);
+ if (r != EOK)
+ return r;
- if (read_only)
- return ENOTSUP;
+ if (read_only)
+ return ENOTSUP;
- /* Compute limits for indirect block levels */
- uint32_t blocks_id = bsize / sizeof(uint32_t);
+ /* Compute limits for indirect block levels */
+ uint32_t blocks_id = bsize / sizeof(uint32_t);
- fs->inode_block_limits[0] = EXT4_INODE_DIRECT_BLOCK_COUNT;
- fs->inode_blocks_per_level[0] = 1;
+ fs->inode_block_limits[0] = EXT4_INODE_DIRECT_BLOCK_COUNT;
+ fs->inode_blocks_per_level[0] = 1;
- for (i = 1; i < 4; i++) {
- fs->inode_blocks_per_level[i] =
- fs->inode_blocks_per_level[i - 1] * blocks_id;
- fs->inode_block_limits[i] =
- fs->inode_block_limits[i - 1] + fs->inode_blocks_per_level[i];
- }
+ for (i = 1; i < 4; i++) {
+ fs->inode_blocks_per_level[i] =
+ fs->inode_blocks_per_level[i - 1] * blocks_id;
+ fs->inode_block_limits[i] = fs->inode_block_limits[i - 1] +
+ fs->inode_blocks_per_level[i];
+ }
- /*Validate FS*/
- tmp = ext4_get16(&fs->sb, state);
- if (tmp & EXT4_SUPERBLOCK_STATE_ERROR_FS) {
- ext4_dprintf(EXT4_DEBUG_FS, "last umount error\n");
- }
+ /*Validate FS*/
+ tmp = ext4_get16(&fs->sb, state);
+ if (tmp & EXT4_SUPERBLOCK_STATE_ERROR_FS) {
+ ext4_dprintf(EXT4_DEBUG_FS, "last umount error\n");
+ }
- /* Mark system as mounted */
- ext4_set16(&fs->sb, state, EXT4_SUPERBLOCK_STATE_ERROR_FS);
- r = ext4_sb_write(fs->bdev, &fs->sb);
- if (r != EOK)
- return r;
+ /* Mark system as mounted */
+ ext4_set16(&fs->sb, state, EXT4_SUPERBLOCK_STATE_ERROR_FS);
+ r = ext4_sb_write(fs->bdev, &fs->sb);
+ if (r != EOK)
+ return r;
- /*Update mount count*/
- ext4_set16(&fs->sb, mount_count, ext4_get16(&fs->sb, mount_count) + 1);
+ /*Update mount count*/
+ ext4_set16(&fs->sb, mount_count, ext4_get16(&fs->sb, mount_count) + 1);
- return r;
+ return r;
}
int ext4_fs_fini(struct ext4_fs *fs)
{
- ext4_assert(fs);
+ ext4_assert(fs);
- /*Set superblock state*/
- ext4_set16(&fs->sb, state, EXT4_SUPERBLOCK_STATE_VALID_FS);
+ /*Set superblock state*/
+ ext4_set16(&fs->sb, state, EXT4_SUPERBLOCK_STATE_VALID_FS);
- return ext4_sb_write(fs->bdev, &fs->sb);
+ return ext4_sb_write(fs->bdev, &fs->sb);
}
static void ext4_fs_debug_features_incomp(uint32_t features_incompatible)
{
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_COMPRESSION) {
- ext4_dprintf(EXT4_DEBUG_FS, "compression\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_FILETYPE) {
- ext4_dprintf(EXT4_DEBUG_FS, "filetype\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_RECOVER) {
- ext4_dprintf(EXT4_DEBUG_FS, "recover\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_JOURNAL_DEV) {
- ext4_dprintf(EXT4_DEBUG_FS, "journal_dev\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_META_BG) {
- ext4_dprintf(EXT4_DEBUG_FS, "meta_bg\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_EXTENTS) {
- ext4_dprintf(EXT4_DEBUG_FS, "extents\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_64BIT) {
- ext4_dprintf(EXT4_DEBUG_FS, "64bit\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_MMP) {
- ext4_dprintf(EXT4_DEBUG_FS, "mnp\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_FLEX_BG) {
- ext4_dprintf(EXT4_DEBUG_FS, "flex_bg\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_EA_INODE) {
- ext4_dprintf(EXT4_DEBUG_FS, "ea_inode\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_DIRDATA) {
- ext4_dprintf(EXT4_DEBUG_FS, "dirdata\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM) {
- ext4_dprintf(EXT4_DEBUG_FS, "meta_csum\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_LARGEDIR) {
- ext4_dprintf(EXT4_DEBUG_FS, "largedir\n");
- }
- if (features_incompatible & EXT4_FEATURE_INCOMPAT_INLINE_DATA) {
- ext4_dprintf(EXT4_DEBUG_FS, "inline_data\n");
- }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_COMPRESSION) {
+ ext4_dprintf(EXT4_DEBUG_FS, "compression\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_FILETYPE) {
+ ext4_dprintf(EXT4_DEBUG_FS, "filetype\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_RECOVER) {
+ ext4_dprintf(EXT4_DEBUG_FS, "recover\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_JOURNAL_DEV) {
+ ext4_dprintf(EXT4_DEBUG_FS, "journal_dev\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_META_BG) {
+ ext4_dprintf(EXT4_DEBUG_FS, "meta_bg\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_EXTENTS) {
+ ext4_dprintf(EXT4_DEBUG_FS, "extents\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_64BIT) {
+ ext4_dprintf(EXT4_DEBUG_FS, "64bit\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_MMP) {
+ ext4_dprintf(EXT4_DEBUG_FS, "mnp\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_FLEX_BG) {
+ ext4_dprintf(EXT4_DEBUG_FS, "flex_bg\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_EA_INODE) {
+ ext4_dprintf(EXT4_DEBUG_FS, "ea_inode\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_DIRDATA) {
+ ext4_dprintf(EXT4_DEBUG_FS, "dirdata\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM) {
+ ext4_dprintf(EXT4_DEBUG_FS, "meta_csum\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_LARGEDIR) {
+ ext4_dprintf(EXT4_DEBUG_FS, "largedir\n");
+ }
+ if (features_incompatible & EXT4_FEATURE_INCOMPAT_INLINE_DATA) {
+ ext4_dprintf(EXT4_DEBUG_FS, "inline_data\n");
+ }
}
static void ext4_fs_debug_features_comp(uint32_t features_compatible)
{
- if (features_compatible & EXT4_FEATURE_COMPAT_DIR_PREALLOC) {
- ext4_dprintf(EXT4_DEBUG_FS, " dir_prealloc\n");
- }
- if (features_compatible & EXT4_FEATURE_COMPAT_IMAGIC_INODES) {
- ext4_dprintf(EXT4_DEBUG_FS, "imagic_inodes\n");
- }
- if (features_compatible & EXT4_FEATURE_COMPAT_HAS_JOURNAL) {
- ext4_dprintf(EXT4_DEBUG_FS, "has_journal\n");
- }
- if (features_compatible & EXT4_FEATURE_COMPAT_EXT_ATTR) {
- ext4_dprintf(EXT4_DEBUG_FS, "ext_attr\n");
- }
- if (features_compatible & EXT4_FEATURE_COMPAT_RESIZE_INODE) {
- ext4_dprintf(EXT4_DEBUG_FS, "resize_inode\n");
- }
- if (features_compatible & EXT4_FEATURE_COMPAT_DIR_INDEX) {
- ext4_dprintf(EXT4_DEBUG_FS, "dir_index\n");
- }
+ if (features_compatible & EXT4_FEATURE_COMPAT_DIR_PREALLOC) {
+ ext4_dprintf(EXT4_DEBUG_FS, " dir_prealloc\n");
+ }
+ if (features_compatible & EXT4_FEATURE_COMPAT_IMAGIC_INODES) {
+ ext4_dprintf(EXT4_DEBUG_FS, "imagic_inodes\n");
+ }
+ if (features_compatible & EXT4_FEATURE_COMPAT_HAS_JOURNAL) {
+ ext4_dprintf(EXT4_DEBUG_FS, "has_journal\n");
+ }
+ if (features_compatible & EXT4_FEATURE_COMPAT_EXT_ATTR) {
+ ext4_dprintf(EXT4_DEBUG_FS, "ext_attr\n");
+ }
+ if (features_compatible & EXT4_FEATURE_COMPAT_RESIZE_INODE) {
+ ext4_dprintf(EXT4_DEBUG_FS, "resize_inode\n");
+ }
+ if (features_compatible & EXT4_FEATURE_COMPAT_DIR_INDEX) {
+ ext4_dprintf(EXT4_DEBUG_FS, "dir_index\n");
+ }
}
static void ext4_fs_debug_features_ro(uint32_t features_ro)
{
- if (features_ro & EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER) {
- ext4_dprintf(EXT4_DEBUG_FS, "sparse_super\n");
- }
- if (features_ro & EXT4_FEATURE_RO_COMPAT_LARGE_FILE) {
- ext4_dprintf(EXT4_DEBUG_FS, "large_file\n");
- }
- if (features_ro & EXT4_FEATURE_RO_COMPAT_BTREE_DIR) {
- ext4_dprintf(EXT4_DEBUG_FS, "btree_dir\n");
- }
- if (features_ro & EXT4_FEATURE_RO_COMPAT_HUGE_FILE) {
- ext4_dprintf(EXT4_DEBUG_FS, "huge_file\n");
- }
- if (features_ro & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
- ext4_dprintf(EXT4_DEBUG_FS, "gtd_csum\n");
- }
- if (features_ro & EXT4_FEATURE_RO_COMPAT_DIR_NLINK) {
- ext4_dprintf(EXT4_DEBUG_FS, "dir_nlink\n");
- }
- if (features_ro & EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE) {
- ext4_dprintf(EXT4_DEBUG_FS, "extra_isize\n");
- }
- if (features_ro & EXT4_FEATURE_RO_COMPAT_QUOTA) {
- ext4_dprintf(EXT4_DEBUG_FS, "quota\n");
- }
- if (features_ro & EXT4_FEATURE_RO_COMPAT_BIGALLOC) {
- ext4_dprintf(EXT4_DEBUG_FS, "bigalloc\n");
- }
- if (features_ro & EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) {
- ext4_dprintf(EXT4_DEBUG_FS, "metadata_csum\n");
- }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER) {
+ ext4_dprintf(EXT4_DEBUG_FS, "sparse_super\n");
+ }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_LARGE_FILE) {
+ ext4_dprintf(EXT4_DEBUG_FS, "large_file\n");
+ }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_BTREE_DIR) {
+ ext4_dprintf(EXT4_DEBUG_FS, "btree_dir\n");
+ }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_HUGE_FILE) {
+ ext4_dprintf(EXT4_DEBUG_FS, "huge_file\n");
+ }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
+ ext4_dprintf(EXT4_DEBUG_FS, "gtd_csum\n");
+ }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_DIR_NLINK) {
+ ext4_dprintf(EXT4_DEBUG_FS, "dir_nlink\n");
+ }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE) {
+ ext4_dprintf(EXT4_DEBUG_FS, "extra_isize\n");
+ }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_QUOTA) {
+ ext4_dprintf(EXT4_DEBUG_FS, "quota\n");
+ }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_BIGALLOC) {
+ ext4_dprintf(EXT4_DEBUG_FS, "bigalloc\n");
+ }
+ if (features_ro & EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) {
+ ext4_dprintf(EXT4_DEBUG_FS, "metadata_csum\n");
+ }
}
int ext4_fs_check_features(struct ext4_fs *fs, bool *read_only)
{
- ext4_assert(fs && read_only);
- uint32_t v;
- if (ext4_get32(&fs->sb, rev_level) == 0) {
- *read_only = false;
- return EOK;
- }
-
- ext4_dprintf(EXT4_DEBUG_FS, "\nSB features_incompatible:\n");
- ext4_fs_debug_features_incomp(ext4_get32(&fs->sb, features_incompatible));
-
- ext4_dprintf(EXT4_DEBUG_FS, "\nSB features_compatible:\n");
- ext4_fs_debug_features_comp(ext4_get32(&fs->sb, features_compatible));
-
- ext4_dprintf(EXT4_DEBUG_FS, "\nSB features_read_only:\n");
- ext4_fs_debug_features_ro(ext4_get32(&fs->sb, features_read_only));
-
- /*Check features_incompatible*/
- v = (ext4_get32(&fs->sb, features_incompatible) &
- (~CONFIG_FEATURE_INCOMPAT_SUPP));
- if (v) {
- ext4_dprintf(EXT4_DEBUG_FS, "SB features_incompatible: fail\n");
- ext4_fs_debug_features_incomp(v);
- return ENOTSUP;
- }
-
- /*Check features_read_only*/
- v = (ext4_get32(&fs->sb, features_read_only) &
- (~CONFIG_FEATURE_RO_COMPAT_SUPP));
- if (v) {
- ext4_dprintf(EXT4_DEBUG_FS,
- "\nERROR sblock features_read_only . Unsupported:\n");
- ext4_fs_debug_features_incomp(v);
-
- *read_only = true;
- return EOK;
- }
- *read_only = false;
-
- return EOK;
+ ext4_assert(fs && read_only);
+ uint32_t v;
+ if (ext4_get32(&fs->sb, rev_level) == 0) {
+ *read_only = false;
+ return EOK;
+ }
+
+ ext4_dprintf(EXT4_DEBUG_FS, "\nSB features_incompatible:\n");
+ ext4_fs_debug_features_incomp(
+ ext4_get32(&fs->sb, features_incompatible));
+
+ ext4_dprintf(EXT4_DEBUG_FS, "\nSB features_compatible:\n");
+ ext4_fs_debug_features_comp(ext4_get32(&fs->sb, features_compatible));
+
+ ext4_dprintf(EXT4_DEBUG_FS, "\nSB features_read_only:\n");
+ ext4_fs_debug_features_ro(ext4_get32(&fs->sb, features_read_only));
+
+ /*Check features_incompatible*/
+ v = (ext4_get32(&fs->sb, features_incompatible) &
+ (~CONFIG_FEATURE_INCOMPAT_SUPP));
+ if (v) {
+ ext4_dprintf(EXT4_DEBUG_FS, "SB features_incompatible: fail\n");
+ ext4_fs_debug_features_incomp(v);
+ return ENOTSUP;
+ }
+
+ /*Check features_read_only*/
+ v = (ext4_get32(&fs->sb, features_read_only) &
+ (~CONFIG_FEATURE_RO_COMPAT_SUPP));
+ if (v) {
+ ext4_dprintf(
+ EXT4_DEBUG_FS,
+ "\nERROR sblock features_read_only . Unsupported:\n");
+ ext4_fs_debug_features_incomp(v);
+
+ *read_only = true;
+ return EOK;
+ }
+ *read_only = false;
+
+ return EOK;
}
/**@brief Initialize block bitmap in block group.
*/
static int ext4_fs_init_block_bitmap(struct ext4_block_group_ref *bg_ref)
{
- uint32_t i;
- uint32_t bitmap_block_addr =
- ext4_bg_get_block_bitmap(bg_ref->block_group, &bg_ref->fs->sb);
+ uint32_t i;
+ uint32_t bitmap_block_addr =
+ ext4_bg_get_block_bitmap(bg_ref->block_group, &bg_ref->fs->sb);
- struct ext4_block block_bitmap;
- int rc = ext4_block_get(bg_ref->fs->bdev, &block_bitmap, bitmap_block_addr);
- if (rc != EOK)
- return rc;
+ struct ext4_block block_bitmap;
+ int rc =
+ ext4_block_get(bg_ref->fs->bdev, &block_bitmap, bitmap_block_addr);
+ if (rc != EOK)
+ return rc;
- memset(block_bitmap.data, 0, ext4_sb_get_block_size(&bg_ref->fs->sb));
+ memset(block_bitmap.data, 0, ext4_sb_get_block_size(&bg_ref->fs->sb));
- /* Determine first block and first data block in group */
- uint32_t first_idx = 0;
+ /* Determine first block and first data block in group */
+ uint32_t first_idx = 0;
- uint32_t first_data =
- ext4_balloc_get_first_data_block_in_group(&bg_ref->fs->sb, bg_ref);
- uint32_t first_data_idx =
- ext4_fs_baddr2_index_in_group(&bg_ref->fs->sb, first_data);
+ uint32_t first_data =
+ ext4_balloc_get_first_data_block_in_group(&bg_ref->fs->sb, bg_ref);
+ uint32_t first_data_idx =
+ ext4_fs_baddr2_index_in_group(&bg_ref->fs->sb, first_data);
- /*Set bits from to first block to first data block - 1 to one (allocated)*/
- /*TODO: Optimize it*/
- for (i = first_idx; i < first_data_idx; ++i)
- ext4_bmap_bit_set(block_bitmap.data, i);
+ /*Set bits from to first block to first data block - 1 to one
+ * (allocated)*/
+ /*TODO: Optimize it*/
+ for (i = first_idx; i < first_data_idx; ++i)
+ ext4_bmap_bit_set(block_bitmap.data, i);
- block_bitmap.dirty = true;
+ block_bitmap.dirty = true;
- /* Save bitmap */
- return ext4_block_set(bg_ref->fs->bdev, &block_bitmap);
+ /* Save bitmap */
+ return ext4_block_set(bg_ref->fs->bdev, &block_bitmap);
}
/**@brief Initialize i-node bitmap in block group.
*/
static int ext4_fs_init_inode_bitmap(struct ext4_block_group_ref *bg_ref)
{
- /* Load bitmap */
- uint32_t bitmap_block_addr =
- ext4_bg_get_inode_bitmap(bg_ref->block_group, &bg_ref->fs->sb);
+ /* Load bitmap */
+ uint32_t bitmap_block_addr =
+ ext4_bg_get_inode_bitmap(bg_ref->block_group, &bg_ref->fs->sb);
- struct ext4_block block_bitmap;
- int rc = ext4_block_get(bg_ref->fs->bdev, &block_bitmap, bitmap_block_addr);
- if (rc != EOK)
- return rc;
+ struct ext4_block block_bitmap;
+ int rc =
+ ext4_block_get(bg_ref->fs->bdev, &block_bitmap, bitmap_block_addr);
+ if (rc != EOK)
+ return rc;
- /* Initialize all bitmap bits to zero */
- uint32_t block_size = ext4_sb_get_block_size(&bg_ref->fs->sb);
- uint32_t inodes_per_group = ext4_get32(&bg_ref->fs->sb, inodes_per_group);
+ /* Initialize all bitmap bits to zero */
+ uint32_t block_size = ext4_sb_get_block_size(&bg_ref->fs->sb);
+ uint32_t inodes_per_group =
+ ext4_get32(&bg_ref->fs->sb, inodes_per_group);
- memset(block_bitmap.data, 0, (inodes_per_group + 7) / 8);
+ memset(block_bitmap.data, 0, (inodes_per_group + 7) / 8);
- uint32_t start_bit = inodes_per_group;
- uint32_t end_bit = block_size * 8;
+ uint32_t start_bit = inodes_per_group;
+ uint32_t end_bit = block_size * 8;
- uint32_t i;
- for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++)
- ext4_bmap_bit_set(block_bitmap.data, i);
+ uint32_t i;
+ for (i = start_bit; i < ((start_bit + 7) & ~7UL); i++)
+ ext4_bmap_bit_set(block_bitmap.data, i);
- if (i < end_bit)
- memset(block_bitmap.data + (i >> 3), 0xff, (end_bit - i) >> 3);
+ if (i < end_bit)
+ memset(block_bitmap.data + (i >> 3), 0xff, (end_bit - i) >> 3);
- block_bitmap.dirty = true;
+ block_bitmap.dirty = true;
- /* Save bitmap */
- return ext4_block_set(bg_ref->fs->bdev, &block_bitmap);
+ /* Save bitmap */
+ return ext4_block_set(bg_ref->fs->bdev, &block_bitmap);
}
/**@brief Initialize i-node table in block group.
*/
static int ext4_fs_init_inode_table(struct ext4_block_group_ref *bg_ref)
{
- struct ext4_sblock *sb = &bg_ref->fs->sb;
+ struct ext4_sblock *sb = &bg_ref->fs->sb;
- uint32_t inode_size = ext4_get32(sb, inode_size);
- uint32_t block_size = ext4_sb_get_block_size(sb);
- uint32_t inodes_per_block = block_size / inode_size;
- uint32_t inodes_in_group = ext4_inodes_in_group_cnt(sb, bg_ref->index);
- uint32_t table_blocks = inodes_in_group / inodes_per_block;
- uint32_t fblock;
+ uint32_t inode_size = ext4_get32(sb, inode_size);
+ uint32_t block_size = ext4_sb_get_block_size(sb);
+ uint32_t inodes_per_block = block_size / inode_size;
+ uint32_t inodes_in_group = ext4_inodes_in_group_cnt(sb, bg_ref->index);
+ uint32_t table_blocks = inodes_in_group / inodes_per_block;
+ uint32_t fblock;
- if (inodes_in_group % inodes_per_block)
- table_blocks++;
+ if (inodes_in_group % inodes_per_block)
+ table_blocks++;
- /* Compute initialization bounds */
- uint32_t first_block =
- ext4_bg_get_inode_table_first_block(bg_ref->block_group, sb);
+ /* Compute initialization bounds */
+ uint32_t first_block =
+ ext4_bg_get_inode_table_first_block(bg_ref->block_group, sb);
- uint32_t last_block = first_block + table_blocks - 1;
+ uint32_t last_block = first_block + table_blocks - 1;
- /* Initialization of all itable blocks */
- for (fblock = first_block; fblock <= last_block; ++fblock) {
+ /* Initialization of all itable blocks */
+ for (fblock = first_block; fblock <= last_block; ++fblock) {
- struct ext4_block block;
- int rc = ext4_block_get(bg_ref->fs->bdev, &block, fblock);
- if (rc != EOK)
- return rc;
+ struct ext4_block block;
+ int rc = ext4_block_get(bg_ref->fs->bdev, &block, fblock);
+ if (rc != EOK)
+ return rc;
- memset(block.data, 0, block_size);
- block.dirty = true;
+ memset(block.data, 0, block_size);
+ block.dirty = true;
- ext4_block_set(bg_ref->fs->bdev, &block);
- if (rc != EOK)
- return rc;
- }
+ ext4_block_set(bg_ref->fs->bdev, &block);
+ if (rc != EOK)
+ return rc;
+ }
- return EOK;
+ return EOK;
}
static uint64_t ext4_fs_get_descriptor_block(struct ext4_sblock *s,
- uint32_t bgid,
- uint32_t dsc_per_block)
+ uint32_t bgid,
+ uint32_t dsc_per_block)
{
- uint32_t first_meta_bg, dsc_id;
+ uint32_t first_meta_bg, dsc_id;
- int has_super = 0;
+ int has_super = 0;
- dsc_id = bgid / dsc_per_block;
- first_meta_bg = ext4_sb_first_meta_bg(s);
+ dsc_id = bgid / dsc_per_block;
+ first_meta_bg = ext4_sb_first_meta_bg(s);
- if (!ext4_sb_has_feature_incompatible(s, EXT4_FEATURE_INCOMPAT_META_BG) ||
- dsc_id < first_meta_bg)
- return ext4_get32(s, first_data_block) + dsc_id + 1;
+ if (!ext4_sb_has_feature_incompatible(s,
+ EXT4_FEATURE_INCOMPAT_META_BG) ||
+ dsc_id < first_meta_bg)
+ return ext4_get32(s, first_data_block) + dsc_id + 1;
- if (ext4_sb_is_super_in_bg(s, bgid))
- has_super = 1;
+ if (ext4_sb_is_super_in_bg(s, bgid))
+ has_super = 1;
- return (has_super + ext4_fs_first_bg_block_no(s, bgid));
+ return (has_super + ext4_fs_first_bg_block_no(s, bgid));
}
int ext4_fs_get_block_group_ref(struct ext4_fs *fs, uint32_t bgid,
- struct ext4_block_group_ref *ref)
+ struct ext4_block_group_ref *ref)
{
- /* Compute number of descriptors, that fits in one data block */
- uint32_t dsc_per_block =
- ext4_sb_get_block_size(&fs->sb) / ext4_sb_get_desc_size(&fs->sb);
-
- /* Block group descriptor table starts at the next block after superblock */
- uint64_t block_id =
- ext4_fs_get_descriptor_block(&fs->sb, bgid, dsc_per_block);
-
- uint32_t offset = (bgid % dsc_per_block) * ext4_sb_get_desc_size(&fs->sb);
-
- int rc = ext4_block_get(fs->bdev, &ref->block, block_id);
- if (rc != EOK)
- return rc;
-
- ref->block_group = (void *)(ref->block.data + offset);
- ref->fs = fs;
- ref->index = bgid;
- ref->dirty = false;
-
- if (ext4_bg_has_flag(ref->block_group, EXT4_BLOCK_GROUP_BLOCK_UNINIT)) {
- rc = ext4_fs_init_block_bitmap(ref);
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &ref->block);
- return rc;
- }
- ext4_bg_clear_flag(ref->block_group, EXT4_BLOCK_GROUP_BLOCK_UNINIT);
-
- ref->dirty = true;
- }
-
- if (ext4_bg_has_flag(ref->block_group, EXT4_BLOCK_GROUP_INODE_UNINIT)) {
- rc = ext4_fs_init_inode_bitmap(ref);
- if (rc != EOK) {
- ext4_block_set(ref->fs->bdev, &ref->block);
- return rc;
- }
-
- ext4_bg_clear_flag(ref->block_group, EXT4_BLOCK_GROUP_INODE_UNINIT);
-
- if (!ext4_bg_has_flag(ref->block_group,
- EXT4_BLOCK_GROUP_ITABLE_ZEROED)) {
- rc = ext4_fs_init_inode_table(ref);
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &ref->block);
- return rc;
- }
-
- ext4_bg_set_flag(ref->block_group, EXT4_BLOCK_GROUP_ITABLE_ZEROED);
- }
-
- ref->dirty = true;
- }
-
- return EOK;
+ /* Compute number of descriptors, that fits in one data block */
+ uint32_t dsc_per_block =
+ ext4_sb_get_block_size(&fs->sb) / ext4_sb_get_desc_size(&fs->sb);
+
+ /* Block group descriptor table starts at the next block after
+ * superblock */
+ uint64_t block_id =
+ ext4_fs_get_descriptor_block(&fs->sb, bgid, dsc_per_block);
+
+ uint32_t offset =
+ (bgid % dsc_per_block) * ext4_sb_get_desc_size(&fs->sb);
+
+ int rc = ext4_block_get(fs->bdev, &ref->block, block_id);
+ if (rc != EOK)
+ return rc;
+
+ ref->block_group = (void *)(ref->block.data + offset);
+ ref->fs = fs;
+ ref->index = bgid;
+ ref->dirty = false;
+
+ if (ext4_bg_has_flag(ref->block_group, EXT4_BLOCK_GROUP_BLOCK_UNINIT)) {
+ rc = ext4_fs_init_block_bitmap(ref);
+ if (rc != EOK) {
+ ext4_block_set(fs->bdev, &ref->block);
+ return rc;
+ }
+ ext4_bg_clear_flag(ref->block_group,
+ EXT4_BLOCK_GROUP_BLOCK_UNINIT);
+
+ ref->dirty = true;
+ }
+
+ if (ext4_bg_has_flag(ref->block_group, EXT4_BLOCK_GROUP_INODE_UNINIT)) {
+ rc = ext4_fs_init_inode_bitmap(ref);
+ if (rc != EOK) {
+ ext4_block_set(ref->fs->bdev, &ref->block);
+ return rc;
+ }
+
+ ext4_bg_clear_flag(ref->block_group,
+ EXT4_BLOCK_GROUP_INODE_UNINIT);
+
+ if (!ext4_bg_has_flag(ref->block_group,
+ EXT4_BLOCK_GROUP_ITABLE_ZEROED)) {
+ rc = ext4_fs_init_inode_table(ref);
+ if (rc != EOK) {
+ ext4_block_set(fs->bdev, &ref->block);
+ return rc;
+ }
+
+ ext4_bg_set_flag(ref->block_group,
+ EXT4_BLOCK_GROUP_ITABLE_ZEROED);
+ }
+
+ ref->dirty = true;
+ }
+
+ return EOK;
}
/**@brief Compute checksum of block group descriptor.
* @return Checksum value
*/
static uint16_t ext4_fs_bg_checksum(struct ext4_sblock *sb, uint32_t bgid,
- struct ext4_bgroup *bg)
+ struct ext4_bgroup *bg)
{
- /* If checksum not supported, 0 will be returned */
- uint16_t crc = 0;
+ /* If checksum not supported, 0 will be returned */
+ uint16_t crc = 0;
- /* Compute the checksum only if the filesystem supports it */
- if (ext4_sb_has_feature_read_only(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
- uint8_t *base = (uint8_t *)bg;
- uint8_t *checksum = (uint8_t *)&bg->checksum;
+ /* Compute the checksum only if the filesystem supports it */
+ if (ext4_sb_has_feature_read_only(sb,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+ uint8_t *base = (uint8_t *)bg;
+ uint8_t *checksum = (uint8_t *)&bg->checksum;
- uint32_t offset = (uint32_t)(checksum - base);
+ uint32_t offset = (uint32_t)(checksum - base);
- /* Convert block group index to little endian */
- uint32_t le_group = to_le32(bgid);
+ /* Convert block group index to little endian */
+ uint32_t le_group = to_le32(bgid);
- /* Initialization */
- crc = ext4_bg_crc16(~0, sb->uuid, sizeof(sb->uuid));
+ /* Initialization */
+ crc = ext4_bg_crc16(~0, sb->uuid, sizeof(sb->uuid));
- /* Include index of block group */
- crc = ext4_bg_crc16(crc, (uint8_t *)&le_group, sizeof(le_group));
+ /* Include index of block group */
+ crc =
+ ext4_bg_crc16(crc, (uint8_t *)&le_group, sizeof(le_group));
- /* Compute crc from the first part (stop before checksum field) */
- crc = ext4_bg_crc16(crc, (uint8_t *)bg, offset);
+ /* Compute crc from the first part (stop before checksum field)
+ */
+ crc = ext4_bg_crc16(crc, (uint8_t *)bg, offset);
- /* Skip checksum */
- offset += sizeof(bg->checksum);
+ /* Skip checksum */
+ offset += sizeof(bg->checksum);
- /* Checksum of the rest of block group descriptor */
- if ((ext4_sb_has_feature_incompatible(sb,
- EXT4_FEATURE_INCOMPAT_64BIT)) &&
- (offset < ext4_sb_get_desc_size(sb)))
+ /* Checksum of the rest of block group descriptor */
+ if ((ext4_sb_has_feature_incompatible(
+ sb, EXT4_FEATURE_INCOMPAT_64BIT)) &&
+ (offset < ext4_sb_get_desc_size(sb)))
- crc = ext4_bg_crc16(crc, ((uint8_t *)bg) + offset,
- ext4_sb_get_desc_size(sb) - offset);
- }
- return crc;
+ crc = ext4_bg_crc16(crc, ((uint8_t *)bg) + offset,
+ ext4_sb_get_desc_size(sb) - offset);
+ }
+ return crc;
}
int ext4_fs_put_block_group_ref(struct ext4_block_group_ref *ref)
{
- /* Check if reference modified */
- if (ref->dirty) {
- /* Compute new checksum of block group */
- uint16_t checksum =
- ext4_fs_bg_checksum(&ref->fs->sb, ref->index, ref->block_group);
+ /* Check if reference modified */
+ if (ref->dirty) {
+ /* Compute new checksum of block group */
+ uint16_t checksum = ext4_fs_bg_checksum(
+ &ref->fs->sb, ref->index, ref->block_group);
- ref->block_group->checksum = to_le16(checksum);
+ ref->block_group->checksum = to_le16(checksum);
- /* Mark block dirty for writing changes to physical device */
- ref->block.dirty = true;
- }
+ /* Mark block dirty for writing changes to physical device */
+ ref->block.dirty = true;
+ }
- /* Put back block, that contains block group descriptor */
- return ext4_block_set(ref->fs->bdev, &ref->block);
+ /* Put back block, that contains block group descriptor */
+ return ext4_block_set(ref->fs->bdev, &ref->block);
}
int ext4_fs_get_inode_ref(struct ext4_fs *fs, uint32_t index,
- struct ext4_inode_ref *ref)
+ struct ext4_inode_ref *ref)
{
- /* Compute number of i-nodes, that fits in one data block */
- uint32_t inodes_per_group = ext4_get32(&fs->sb, inodes_per_group);
-
- /*
- * Inode numbers are 1-based, but it is simpler to work with 0-based
- * when computing indices
- */
- index -= 1;
- uint32_t block_group = index / inodes_per_group;
- uint32_t offset_in_group = index % inodes_per_group;
-
- /* Load block group, where i-node is located */
- struct ext4_block_group_ref bg_ref;
-
- int rc = ext4_fs_get_block_group_ref(fs, block_group, &bg_ref);
- if (rc != EOK) {
- return rc;
- }
-
- /* Load block address, where i-node table is located */
- uint32_t inode_table_start =
- ext4_bg_get_inode_table_first_block(bg_ref.block_group, &fs->sb);
-
- /* Put back block group reference (not needed more) */
- rc = ext4_fs_put_block_group_ref(&bg_ref);
- if (rc != EOK) {
- return rc;
- }
-
- /* Compute position of i-node in the block group */
- uint16_t inode_size = ext4_get16(&fs->sb, inode_size);
- uint32_t block_size = ext4_sb_get_block_size(&fs->sb);
- uint32_t byte_offset_in_group = offset_in_group * inode_size;
-
- /* Compute block address */
- uint64_t block_id = inode_table_start + (byte_offset_in_group / block_size);
-
- rc = ext4_block_get(fs->bdev, &ref->block, block_id);
- if (rc != EOK) {
- return rc;
- }
-
- /* Compute position of i-node in the data block */
- uint32_t offset_in_block = byte_offset_in_group % block_size;
- ref->inode = (struct ext4_inode *)(ref->block.data + offset_in_block);
-
- /* We need to store the original value of index in the reference */
- ref->index = index + 1;
- ref->fs = fs;
- ref->dirty = false;
-
- return EOK;
+ /* Compute number of i-nodes, that fits in one data block */
+ uint32_t inodes_per_group = ext4_get32(&fs->sb, inodes_per_group);
+
+ /*
+ * Inode numbers are 1-based, but it is simpler to work with 0-based
+ * when computing indices
+ */
+ index -= 1;
+ uint32_t block_group = index / inodes_per_group;
+ uint32_t offset_in_group = index % inodes_per_group;
+
+ /* Load block group, where i-node is located */
+ struct ext4_block_group_ref bg_ref;
+
+ int rc = ext4_fs_get_block_group_ref(fs, block_group, &bg_ref);
+ if (rc != EOK) {
+ return rc;
+ }
+
+ /* Load block address, where i-node table is located */
+ uint32_t inode_table_start =
+ ext4_bg_get_inode_table_first_block(bg_ref.block_group, &fs->sb);
+
+ /* Put back block group reference (not needed more) */
+ rc = ext4_fs_put_block_group_ref(&bg_ref);
+ if (rc != EOK) {
+ return rc;
+ }
+
+ /* Compute position of i-node in the block group */
+ uint16_t inode_size = ext4_get16(&fs->sb, inode_size);
+ uint32_t block_size = ext4_sb_get_block_size(&fs->sb);
+ uint32_t byte_offset_in_group = offset_in_group * inode_size;
+
+ /* Compute block address */
+ uint64_t block_id =
+ inode_table_start + (byte_offset_in_group / block_size);
+
+ rc = ext4_block_get(fs->bdev, &ref->block, block_id);
+ if (rc != EOK) {
+ return rc;
+ }
+
+ /* Compute position of i-node in the data block */
+ uint32_t offset_in_block = byte_offset_in_group % block_size;
+ ref->inode = (struct ext4_inode *)(ref->block.data + offset_in_block);
+
+ /* We need to store the original value of index in the reference */
+ ref->index = index + 1;
+ ref->fs = fs;
+ ref->dirty = false;
+
+ return EOK;
}
int ext4_fs_put_inode_ref(struct ext4_inode_ref *ref)
{
- /* Check if reference modified */
- if (ref->dirty) {
- /* Mark block dirty for writing changes to physical device */
- ref->block.dirty = true;
- }
-
- /* Put back block, that contains i-node */
- return ext4_block_set(ref->fs->bdev, &ref->block);
+ /* Check if reference modified */
+ if (ref->dirty) {
+ /* Mark block dirty for writing changes to physical device */
+ ref->block.dirty = true;
+ }
+
+ /* Put back block, that contains i-node */
+ return ext4_block_set(ref->fs->bdev, &ref->block);
}
-int ext4_fs_alloc_inode(struct ext4_fs *fs, struct ext4_inode_ref *inode_ref,
- bool is_directory)
+void ext4_fs_inode_blocks_init(struct ext4_fs *fs, struct ext4_inode_ref *inode_ref)
{
- /* Check if newly allocated i-node will be a directory */
- uint32_t i;
- bool is_dir;
-
- is_dir = is_directory;
-
- /* Allocate inode by allocation algorithm */
- uint32_t index;
- int rc = ext4_ialloc_alloc_inode(fs, &index, is_dir);
- if (rc != EOK)
- return rc;
-
- /* Load i-node from on-disk i-node table */
- rc = ext4_fs_get_inode_ref(fs, index, inode_ref);
- if (rc != EOK) {
- ext4_ialloc_free_inode(fs, index, is_dir);
- return rc;
- }
-
- /* Initialize i-node */
- struct ext4_inode *inode = inode_ref->inode;
-
- uint16_t mode;
- if (is_dir) {
- /*
- * Default directory permissions to be compatible with other systems
- * 0777 (octal) == rwxrwxrwx
- */
-
- mode = 0777;
- mode |= EXT4_INODE_MODE_DIRECTORY;
- ext4_inode_set_mode(&fs->sb, inode, mode);
- ext4_inode_set_links_count(inode, 0);
- } else {
- /*
- * Default file permissions to be compatible with other systems
- * 0666 (octal) == rw-rw-rw-
- */
-
- mode = 0666;
- mode |= EXT4_INODE_MODE_FILE;
- ext4_inode_set_mode(&fs->sb, inode, mode);
- ext4_inode_set_links_count(inode, 1);
- }
-
- ext4_inode_set_uid(inode, 0);
- ext4_inode_set_gid(inode, 0);
- ext4_inode_set_size(inode, 0);
- ext4_inode_set_access_time(inode, 0);
- ext4_inode_set_change_inode_time(inode, 0);
- ext4_inode_set_modification_time(inode, 0);
- ext4_inode_set_deletion_time(inode, 0);
- ext4_inode_set_blocks_count(&fs->sb, inode, 0);
- ext4_inode_set_flags(inode, 0);
- ext4_inode_set_generation(inode, 0);
-
- /* Reset blocks array */
- for (i = 0; i < EXT4_INODE_BLOCKS; i++)
- inode->blocks[i] = 0;
+ int i;
+ struct ext4_inode *inode = inode_ref->inode;
+
+ for (i = 0; i < EXT4_INODE_BLOCKS; i++)
+ inode->blocks[i] = 0;
#if CONFIG_EXTENT_ENABLE
- /* Initialize extents if needed */
- if (ext4_sb_has_feature_incompatible(&fs->sb,
- EXT4_FEATURE_INCOMPAT_EXTENTS)) {
- ext4_inode_set_flag(inode, EXT4_INODE_FLAG_EXTENTS);
-
- /* Initialize extent root header */
- struct ext4_extent_header *header = ext4_inode_get_extent_header(inode);
- ext4_extent_header_set_depth(header, 0);
- ext4_extent_header_set_entries_count(header, 0);
- ext4_extent_header_set_generation(header, 0);
- ext4_extent_header_set_magic(header, EXT4_EXTENT_MAGIC);
-
- uint16_t max_entries = (EXT4_INODE_BLOCKS * sizeof(uint32_t) -
- sizeof(struct ext4_extent_header)) /
- sizeof(struct ext4_extent);
-
- ext4_extent_header_set_max_entries_count(header, max_entries);
- }
+ /* Initialize extents if needed */
+ if (ext4_sb_has_feature_incompatible(&fs->sb,
+ EXT4_FEATURE_INCOMPAT_EXTENTS)) {
+ ext4_inode_set_flag(inode, EXT4_INODE_FLAG_EXTENTS);
+
+ /* Initialize extent root header */
+ struct ext4_extent_header *header = ext4_inode_get_extent_header(inode);
+ ext4_extent_header_set_depth(header, 0);
+ ext4_extent_header_set_entries_count(header, 0);
+ ext4_extent_header_set_generation(header, 0);
+ ext4_extent_header_set_magic(header, EXT4_EXTENT_MAGIC);
+
+ uint16_t max_entries = (EXT4_INODE_BLOCKS * sizeof(uint32_t) -
+ sizeof(struct ext4_extent_header)) /
+ sizeof(struct ext4_extent);
+
+ ext4_extent_header_set_max_entries_count(header, max_entries);
+ }
#endif
+}
- inode_ref->dirty = true;
+static uint32_t ext4_fs_correspond_inode_mode(int filetype)
+{
+ switch (filetype) {
+ case EXT4_DIRECTORY_FILETYPE_DIR:
+ return EXT4_INODE_MODE_DIRECTORY;
+ case EXT4_DIRECTORY_FILETYPE_REG_FILE:
+ return EXT4_INODE_MODE_FILE;
+ case EXT4_DIRECTORY_FILETYPE_SYMLINK:
+ return EXT4_INODE_MODE_SOFTLINK;
+ default:
+ /* FIXME: right now we only support 3 file type. */
+ ext4_assert(0);
+ }
+ return 0;
+}
- return EOK;
+int ext4_fs_alloc_inode(struct ext4_fs *fs, struct ext4_inode_ref *inode_ref,
+ int filetype)
+{
+ /* Check if newly allocated i-node will be a directory */
+ bool is_dir;
+
+ is_dir = (filetype == EXT4_DIRECTORY_FILETYPE_DIR);
+
+ /* Allocate inode by allocation algorithm */
+ uint32_t index;
+ int rc = ext4_ialloc_alloc_inode(fs, &index, is_dir);
+ if (rc != EOK)
+ return rc;
+
+ /* Load i-node from on-disk i-node table */
+ rc = ext4_fs_get_inode_ref(fs, index, inode_ref);
+ if (rc != EOK) {
+ ext4_ialloc_free_inode(fs, index, is_dir);
+ return rc;
+ }
+
+ /* Initialize i-node */
+ struct ext4_inode *inode = inode_ref->inode;
+
+ uint32_t mode;
+ if (is_dir) {
+ /*
+ * Default directory permissions to be compatible with other
+ * systems
+ * 0777 (octal) == rwxrwxrwx
+ */
+
+ mode = 0777;
+ mode |= EXT4_INODE_MODE_DIRECTORY;
+ } else {
+ /*
+ * Default file permissions to be compatible with other systems
+ * 0666 (octal) == rw-rw-rw-
+ */
+
+ mode = 0666;
+ mode |= ext4_fs_correspond_inode_mode(filetype);
+ }
+ ext4_inode_set_mode(&fs->sb, inode, mode);
+
+ ext4_inode_set_links_count(inode, 0);
+ ext4_inode_set_uid(inode, 0);
+ ext4_inode_set_gid(inode, 0);
+ ext4_inode_set_size(inode, 0);
+ ext4_inode_set_access_time(inode, 0);
+ ext4_inode_set_change_inode_time(inode, 0);
+ ext4_inode_set_modification_time(inode, 0);
+ ext4_inode_set_deletion_time(inode, 0);
+ ext4_inode_set_blocks_count(&fs->sb, inode, 0);
+ ext4_inode_set_flags(inode, 0);
+ ext4_inode_set_generation(inode, 0);
+
+ /* Reset blocks array. For symbolic link inode, just
+ * fill in blocks with 0 */
+ if (ext4_inode_is_type(&fs->sb, inode, EXT4_INODE_MODE_SOFTLINK)) {
+ for (int i = 0; i < EXT4_INODE_BLOCKS; i++)
+ inode->blocks[i] = 0;
+
+ } else
+ ext4_fs_inode_blocks_init(fs, inode_ref);
+
+ inode_ref->dirty = true;
+
+ return EOK;
}
int ext4_fs_free_inode(struct ext4_inode_ref *inode_ref)
{
- struct ext4_fs *fs = inode_ref->fs;
- uint32_t offset;
- uint32_t suboffset;
+ struct ext4_fs *fs = inode_ref->fs;
+ uint32_t offset;
+ uint32_t suboffset;
#if CONFIG_EXTENT_ENABLE
- /* For extents must be data block destroyed by other way */
- if ((ext4_sb_has_feature_incompatible(&fs->sb,
- EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
- (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
- /* Data structures are released during truncate operation... */
- goto finish;
- }
+ /* For extents must be data block destroyed by other way */
+ if ((ext4_sb_has_feature_incompatible(&fs->sb,
+ EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
+ (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
+ /* Data structures are released during truncate operation... */
+ goto finish;
+ }
#endif
- /* Release all indirect (no data) blocks */
-
- /* 1) Single indirect */
- uint32_t fblock = ext4_inode_get_indirect_block(inode_ref->inode, 0);
- if (fblock != 0) {
- int rc = ext4_balloc_free_block(inode_ref, fblock);
- if (rc != EOK)
- return rc;
-
- ext4_inode_set_indirect_block(inode_ref->inode, 0, 0);
- }
-
- uint32_t block_size = ext4_sb_get_block_size(&fs->sb);
- uint32_t count = block_size / sizeof(uint32_t);
-
- struct ext4_block block;
-
- /* 2) Double indirect */
- fblock = ext4_inode_get_indirect_block(inode_ref->inode, 1);
- if (fblock != 0) {
- int rc = ext4_block_get(fs->bdev, &block, fblock);
- if (rc != EOK)
- return rc;
-
- uint32_t ind_block;
- for (offset = 0; offset < count; ++offset) {
- ind_block = to_le32(((uint32_t *)block.data)[offset]);
-
- if (ind_block != 0) {
- rc = ext4_balloc_free_block(inode_ref, ind_block);
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &block);
- return rc;
- }
- }
- }
-
- ext4_block_set(fs->bdev, &block);
- rc = ext4_balloc_free_block(inode_ref, fblock);
- if (rc != EOK)
- return rc;
-
- ext4_inode_set_indirect_block(inode_ref->inode, 1, 0);
- }
-
- /* 3) Tripple indirect */
- struct ext4_block subblock;
- fblock = ext4_inode_get_indirect_block(inode_ref->inode, 2);
- if (fblock != 0) {
- int rc = ext4_block_get(fs->bdev, &block, fblock);
- if (rc != EOK)
- return rc;
-
- uint32_t ind_block;
- for (offset = 0; offset < count; ++offset) {
- ind_block = to_le32(((uint32_t *)block.data)[offset]);
-
- if (ind_block != 0) {
- rc = ext4_block_get(fs->bdev, &subblock, ind_block);
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &block);
- return rc;
- }
-
- uint32_t ind_subblock;
- for (suboffset = 0; suboffset < count; ++suboffset) {
- ind_subblock =
- to_le32(((uint32_t *)subblock.data)[suboffset]);
-
- if (ind_subblock != 0) {
- rc = ext4_balloc_free_block(inode_ref, ind_subblock);
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &subblock);
- ext4_block_set(fs->bdev, &block);
- return rc;
- }
- }
- }
-
- ext4_block_set(fs->bdev, &subblock);
-
- rc = ext4_balloc_free_block(inode_ref, ind_block);
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &block);
- return rc;
- }
- }
- }
-
- ext4_block_set(fs->bdev, &block);
- rc = ext4_balloc_free_block(inode_ref, fblock);
- if (rc != EOK)
- return rc;
-
- ext4_inode_set_indirect_block(inode_ref->inode, 2, 0);
- }
+ /* Release all indirect (no data) blocks */
+
+ /* 1) Single indirect */
+ uint32_t fblock = ext4_inode_get_indirect_block(inode_ref->inode, 0);
+ if (fblock != 0) {
+ int rc = ext4_balloc_free_block(inode_ref, fblock);
+ if (rc != EOK)
+ return rc;
+
+ ext4_inode_set_indirect_block(inode_ref->inode, 0, 0);
+ }
+
+ uint32_t block_size = ext4_sb_get_block_size(&fs->sb);
+ uint32_t count = block_size / sizeof(uint32_t);
+
+ struct ext4_block block;
+
+ /* 2) Double indirect */
+ fblock = ext4_inode_get_indirect_block(inode_ref->inode, 1);
+ if (fblock != 0) {
+ int rc = ext4_block_get(fs->bdev, &block, fblock);
+ if (rc != EOK)
+ return rc;
+
+ uint32_t ind_block;
+ for (offset = 0; offset < count; ++offset) {
+ ind_block = to_le32(((uint32_t *)block.data)[offset]);
+
+ if (ind_block != 0) {
+ rc = ext4_balloc_free_block(inode_ref,
+ ind_block);
+ if (rc != EOK) {
+ ext4_block_set(fs->bdev, &block);
+ return rc;
+ }
+ }
+ }
+
+ ext4_block_set(fs->bdev, &block);
+ rc = ext4_balloc_free_block(inode_ref, fblock);
+ if (rc != EOK)
+ return rc;
+
+ ext4_inode_set_indirect_block(inode_ref->inode, 1, 0);
+ }
+
+ /* 3) Tripple indirect */
+ struct ext4_block subblock;
+ fblock = ext4_inode_get_indirect_block(inode_ref->inode, 2);
+ if (fblock != 0) {
+ int rc = ext4_block_get(fs->bdev, &block, fblock);
+ if (rc != EOK)
+ return rc;
+
+ uint32_t ind_block;
+ for (offset = 0; offset < count; ++offset) {
+ ind_block = to_le32(((uint32_t *)block.data)[offset]);
+
+ if (ind_block != 0) {
+ rc = ext4_block_get(fs->bdev, &subblock,
+ ind_block);
+ if (rc != EOK) {
+ ext4_block_set(fs->bdev, &block);
+ return rc;
+ }
+
+ uint32_t ind_subblock;
+ for (suboffset = 0; suboffset < count;
+ ++suboffset) {
+ ind_subblock = to_le32(
+ ((uint32_t *)
+ subblock.data)[suboffset]);
+
+ if (ind_subblock != 0) {
+ rc = ext4_balloc_free_block(
+ inode_ref, ind_subblock);
+ if (rc != EOK) {
+ ext4_block_set(
+ fs->bdev,
+ &subblock);
+ ext4_block_set(fs->bdev,
+ &block);
+ return rc;
+ }
+ }
+ }
+
+ ext4_block_set(fs->bdev, &subblock);
+
+ rc = ext4_balloc_free_block(inode_ref,
+ ind_block);
+ if (rc != EOK) {
+ ext4_block_set(fs->bdev, &block);
+ return rc;
+ }
+ }
+ }
+
+ ext4_block_set(fs->bdev, &block);
+ rc = ext4_balloc_free_block(inode_ref, fblock);
+ if (rc != EOK)
+ return rc;
+
+ ext4_inode_set_indirect_block(inode_ref->inode, 2, 0);
+ }
#if CONFIG_EXTENT_ENABLE
finish:
#endif
- /* Mark inode dirty for writing to the physical device */
- inode_ref->dirty = true;
-
- /* Free block with extended attributes if present */
- uint32_t xattr_block = ext4_inode_get_file_acl(inode_ref->inode, &fs->sb);
- if (xattr_block) {
- int rc = ext4_balloc_free_block(inode_ref, xattr_block);
- if (rc != EOK)
- return rc;
-
- ext4_inode_set_file_acl(inode_ref->inode, &fs->sb, 0);
- }
-
- /* Free inode by allocator */
- int rc;
- if (ext4_inode_is_type(&fs->sb, inode_ref->inode,
- EXT4_INODE_MODE_DIRECTORY))
- rc = ext4_ialloc_free_inode(fs, inode_ref->index, true);
- else
- rc = ext4_ialloc_free_inode(fs, inode_ref->index, false);
-
- return rc;
+ /* Mark inode dirty for writing to the physical device */
+ inode_ref->dirty = true;
+
+ /* Free block with extended attributes if present */
+ uint32_t xattr_block =
+ ext4_inode_get_file_acl(inode_ref->inode, &fs->sb);
+ if (xattr_block) {
+ int rc = ext4_balloc_free_block(inode_ref, xattr_block);
+ if (rc != EOK)
+ return rc;
+
+ ext4_inode_set_file_acl(inode_ref->inode, &fs->sb, 0);
+ }
+
+ /* Free inode by allocator */
+ int rc;
+ if (ext4_inode_is_type(&fs->sb, inode_ref->inode,
+ EXT4_INODE_MODE_DIRECTORY))
+ rc = ext4_ialloc_free_inode(fs, inode_ref->index, true);
+ else
+ rc = ext4_ialloc_free_inode(fs, inode_ref->index, false);
+
+ return rc;
}
int ext4_fs_truncate_inode(struct ext4_inode_ref *inode_ref, uint64_t new_size)
{
- struct ext4_sblock *sb = &inode_ref->fs->sb;
- uint32_t i;
-
- /* Check flags, if i-node can be truncated */
- if (!ext4_inode_can_truncate(sb, inode_ref->inode))
- return EINVAL;
-
- /* If sizes are equal, nothing has to be done. */
- uint64_t old_size = ext4_inode_get_size(sb, inode_ref->inode);
- if (old_size == new_size)
- return EOK;
-
- /* It's not suppported to make the larger file by truncate operation */
- if (old_size < new_size)
- return EINVAL;
-
- /* Compute how many blocks will be released */
- uint64_t size_diff = old_size - new_size;
- uint32_t block_size = ext4_sb_get_block_size(sb);
- uint32_t diff_blocks_count = size_diff / block_size;
- if (size_diff % block_size != 0)
- diff_blocks_count++;
-
- uint32_t old_blocks_count = old_size / block_size;
- if (old_size % block_size != 0)
- old_blocks_count++;
+ struct ext4_sblock *sb = &inode_ref->fs->sb;
+ uint32_t i;
+
+ /* Check flags, if i-node can be truncated */
+ if (!ext4_inode_can_truncate(sb, inode_ref->inode))
+ return EINVAL;
+
+ /* If sizes are equal, nothing has to be done. */
+ uint64_t old_size = ext4_inode_get_size(sb, inode_ref->inode);
+ if (old_size == new_size)
+ return EOK;
+
+ /* It's not supported to make the larger file by truncate operation */
+ if (old_size < new_size)
+ return EINVAL;
+
+ /* Compute how many blocks will be released */
+ uint64_t size_diff = old_size - new_size;
+ uint32_t block_size = ext4_sb_get_block_size(sb);
+ uint32_t diff_blocks_count = size_diff / block_size;
+ if (size_diff % block_size != 0)
+ diff_blocks_count++;
+
+ uint32_t old_blocks_count = old_size / block_size;
+ if (old_size % block_size != 0)
+ old_blocks_count++;
#if CONFIG_EXTENT_ENABLE
- if ((ext4_sb_has_feature_incompatible(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
- (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
-
- /* Extents require special operation */
- int rc = ext4_extent_release_blocks_from(
- inode_ref, old_blocks_count - diff_blocks_count);
- if (rc != EOK)
- return rc;
- } else
+ if ((ext4_sb_has_feature_incompatible(sb,
+ EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
+ (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
+
+ /* Extents require special operation */
+ int rc = ext4_extent_release_blocks_from(
+ inode_ref, old_blocks_count - diff_blocks_count);
+ if (rc != EOK)
+ return rc;
+ } else
#endif
- {
- /* Release data blocks from the end of file */
-
- /* Starting from 1 because of logical blocks are numbered from 0 */
- for (i = 1; i <= diff_blocks_count; ++i) {
- int rc =
- ext4_fs_release_inode_block(inode_ref, old_blocks_count - i);
- if (rc != EOK)
- return rc;
- }
- }
-
- /* Update i-node */
- ext4_inode_set_size(inode_ref->inode, new_size);
- inode_ref->dirty = true;
-
- return EOK;
+ {
+ /* Release data blocks from the end of file */
+
+ /* Starting from 1 because of logical blocks are numbered from 0
+ */
+ for (i = 1; i <= diff_blocks_count; ++i) {
+ int rc = ext4_fs_release_inode_block(
+ inode_ref, old_blocks_count - i);
+ if (rc != EOK)
+ return rc;
+ }
+ }
+
+ /* Update i-node */
+ ext4_inode_set_size(inode_ref->inode, new_size);
+ inode_ref->dirty = true;
+
+ return EOK;
}
int ext4_fs_get_inode_data_block_index(struct ext4_inode_ref *inode_ref,
- uint64_t iblock, uint32_t *fblock)
+ uint64_t iblock, uint32_t *fblock)
{
- struct ext4_fs *fs = inode_ref->fs;
+ struct ext4_fs *fs = inode_ref->fs;
- /* For empty file is situation simple */
- if (ext4_inode_get_size(&fs->sb, inode_ref->inode) == 0) {
- *fblock = 0;
- return EOK;
- }
+ /* For empty file is situation simple */
+ if (ext4_inode_get_size(&fs->sb, inode_ref->inode) == 0) {
+ *fblock = 0;
+ return EOK;
+ }
- uint32_t current_block;
+ uint32_t current_block;
#if CONFIG_EXTENT_ENABLE
- /* Handle i-node using extents */
- if ((ext4_sb_has_feature_incompatible(&fs->sb,
- EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
- (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
-
- int rc = ext4_extent_find_block(inode_ref, iblock, ¤t_block);
- if (rc != EOK)
- return rc;
-
- *fblock = current_block;
- return EOK;
- }
+ /* Handle i-node using extents */
+ if ((ext4_sb_has_feature_incompatible(&fs->sb,
+ EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
+ (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
+
+ int rc =
+ ext4_extent_find_block(inode_ref, iblock, ¤t_block);
+ if (rc != EOK)
+ return rc;
+
+ *fblock = current_block;
+ return EOK;
+ }
#endif
- struct ext4_inode *inode = inode_ref->inode;
-
- /* Direct block are read directly from array in i-node structure */
- if (iblock < EXT4_INODE_DIRECT_BLOCK_COUNT) {
- current_block = ext4_inode_get_direct_block(inode, (uint32_t)iblock);
- *fblock = current_block;
- return EOK;
- }
-
- /* Determine indirection level of the target block */
- unsigned int level = 0;
- unsigned int i;
- for (i = 1; i < 4; i++) {
- if (iblock < fs->inode_block_limits[i]) {
- level = i;
- break;
- }
- }
-
- if (level == 0)
- return EIO;
-
- /* Compute offsets for the topmost level */
- uint64_t block_offset_in_level = iblock - fs->inode_block_limits[level - 1];
- current_block = ext4_inode_get_indirect_block(inode, level - 1);
- uint32_t offset_in_block =
- block_offset_in_level / fs->inode_blocks_per_level[level - 1];
-
- /* Sparse file */
- if (current_block == 0) {
- *fblock = 0;
- return EOK;
- }
-
- struct ext4_block block;
-
- /*
- * Navigate through other levels, until we find the block number
- * or find null reference meaning we are dealing with sparse file
- */
- while (level > 0) {
- /* Load indirect block */
- int rc = ext4_block_get(fs->bdev, &block, current_block);
- if (rc != EOK)
- return rc;
-
- /* Read block address from indirect block */
- current_block = to_le32(((uint32_t *)block.data)[offset_in_block]);
-
- /* Put back indirect block untouched */
- rc = ext4_block_set(fs->bdev, &block);
- if (rc != EOK)
- return rc;
-
- /* Check for sparse file */
- if (current_block == 0) {
- *fblock = 0;
- return EOK;
- }
-
- /* Jump to the next level */
- level--;
-
- /* Termination condition - we have address of data block loaded */
- if (level == 0)
- break;
-
- /* Visit the next level */
- block_offset_in_level %= fs->inode_blocks_per_level[level];
- offset_in_block =
- block_offset_in_level / fs->inode_blocks_per_level[level - 1];
- }
-
- *fblock = current_block;
-
- return EOK;
+ struct ext4_inode *inode = inode_ref->inode;
+
+ /* Direct block are read directly from array in i-node structure */
+ if (iblock < EXT4_INODE_DIRECT_BLOCK_COUNT) {
+ current_block =
+ ext4_inode_get_direct_block(inode, (uint32_t)iblock);
+ *fblock = current_block;
+ return EOK;
+ }
+
+ /* Determine indirection level of the target block */
+ unsigned int level = 0;
+ unsigned int i;
+ for (i = 1; i < 4; i++) {
+ if (iblock < fs->inode_block_limits[i]) {
+ level = i;
+ break;
+ }
+ }
+
+ if (level == 0)
+ return EIO;
+
+ /* Compute offsets for the topmost level */
+ uint64_t block_offset_in_level =
+ iblock - fs->inode_block_limits[level - 1];
+ current_block = ext4_inode_get_indirect_block(inode, level - 1);
+ uint32_t offset_in_block =
+ block_offset_in_level / fs->inode_blocks_per_level[level - 1];
+
+ /* Sparse file */
+ if (current_block == 0) {
+ *fblock = 0;
+ return EOK;
+ }
+
+ struct ext4_block block;
+
+ /*
+ * Navigate through other levels, until we find the block number
+ * or find null reference meaning we are dealing with sparse file
+ */
+ while (level > 0) {
+ /* Load indirect block */
+ int rc = ext4_block_get(fs->bdev, &block, current_block);
+ if (rc != EOK)
+ return rc;
+
+ /* Read block address from indirect block */
+ current_block =
+ to_le32(((uint32_t *)block.data)[offset_in_block]);
+
+ /* Put back indirect block untouched */
+ rc = ext4_block_set(fs->bdev, &block);
+ if (rc != EOK)
+ return rc;
+
+ /* Check for sparse file */
+ if (current_block == 0) {
+ *fblock = 0;
+ return EOK;
+ }
+
+ /* Jump to the next level */
+ level--;
+
+ /* Termination condition - we have address of data block loaded
+ */
+ if (level == 0)
+ break;
+
+ /* Visit the next level */
+ block_offset_in_level %= fs->inode_blocks_per_level[level];
+ offset_in_block = block_offset_in_level /
+ fs->inode_blocks_per_level[level - 1];
+ }
+
+ *fblock = current_block;
+
+ return EOK;
}
int ext4_fs_set_inode_data_block_index(struct ext4_inode_ref *inode_ref,
- uint64_t iblock, uint32_t fblock)
+ uint64_t iblock, uint32_t fblock)
{
- struct ext4_fs *fs = inode_ref->fs;
+ struct ext4_fs *fs = inode_ref->fs;
#if CONFIG_EXTENT_ENABLE
- /* Handle inode using extents */
- if ((ext4_sb_has_feature_incompatible(&fs->sb,
- EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
- (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
- /* Not reachable */
- return ENOTSUP;
- }
+ /* Handle inode using extents */
+ if ((ext4_sb_has_feature_incompatible(&fs->sb,
+ EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
+ (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
+ /* Not reachable */
+ return ENOTSUP;
+ }
#endif
- /* Handle simple case when we are dealing with direct reference */
- if (iblock < EXT4_INODE_DIRECT_BLOCK_COUNT) {
- ext4_inode_set_direct_block(inode_ref->inode, (uint32_t)iblock, fblock);
- inode_ref->dirty = true;
-
- return EOK;
- }
-
- /* Determine the indirection level needed to get the desired block */
- unsigned int level = 0;
- unsigned int i;
- for (i = 1; i < 4; i++) {
- if (iblock < fs->inode_block_limits[i]) {
- level = i;
- break;
- }
- }
-
- if (level == 0)
- return EIO;
-
- uint32_t block_size = ext4_sb_get_block_size(&fs->sb);
-
- /* Compute offsets for the topmost level */
- uint64_t block_offset_in_level = iblock - fs->inode_block_limits[level - 1];
- uint32_t current_block =
- ext4_inode_get_indirect_block(inode_ref->inode, level - 1);
- uint32_t offset_in_block =
- block_offset_in_level / fs->inode_blocks_per_level[level - 1];
-
- uint32_t new_block_addr;
-
- struct ext4_block block;
- struct ext4_block new_block;
-
- /* Is needed to allocate indirect block on the i-node level */
- if (current_block == 0) {
- /* Allocate new indirect block */
- int rc = ext4_balloc_alloc_block(inode_ref, &new_block_addr);
- if (rc != EOK)
- return rc;
-
- /* Update i-node */
- ext4_inode_set_indirect_block(inode_ref->inode, level - 1,
- new_block_addr);
- inode_ref->dirty = true;
-
- /* Load newly allocated block */
- rc = ext4_block_get(fs->bdev, &new_block, new_block_addr);
- if (rc != EOK) {
- ext4_balloc_free_block(inode_ref, new_block_addr);
- return rc;
- }
-
- /* Initialize new block */
- memset(new_block.data, 0, block_size);
- new_block.dirty = true;
-
- /* Put back the allocated block */
- rc = ext4_block_set(fs->bdev, &new_block);
- if (rc != EOK)
- return rc;
-
- current_block = new_block_addr;
- }
-
- /*
- * Navigate through other levels, until we find the block number
- * or find null reference meaning we are dealing with sparse file
- */
- while (level > 0) {
- int rc = ext4_block_get(fs->bdev, &block, current_block);
- if (rc != EOK)
- return rc;
-
- current_block = to_le32(((uint32_t *)block.data)[offset_in_block]);
-
- if ((level > 1) && (current_block == 0)) {
- /* Allocate new block */
- rc = ext4_balloc_alloc_block(inode_ref, &new_block_addr);
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &block);
- return rc;
- }
-
- /* Load newly allocated block */
- rc = ext4_block_get(fs->bdev, &new_block, new_block_addr);
-
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &block);
- return rc;
- }
-
- /* Initialize allocated block */
- memset(new_block.data, 0, block_size);
- new_block.dirty = true;
-
- rc = ext4_block_set(fs->bdev, &new_block);
- if (rc != EOK) {
- ext4_block_set(fs->bdev, &block);
- return rc;
- }
-
- /* Write block address to the parent */
- ((uint32_t *)block.data)[offset_in_block] = to_le32(new_block_addr);
- block.dirty = true;
- current_block = new_block_addr;
- }
-
- /* Will be finished, write the fblock address */
- if (level == 1) {
- ((uint32_t *)block.data)[offset_in_block] = to_le32(fblock);
- block.dirty = true;
- }
-
- rc = ext4_block_set(fs->bdev, &block);
- if (rc != EOK)
- return rc;
-
- level--;
-
- /*
- * If we are on the last level, break here as
- * there is no next level to visit
- */
- if (level == 0)
- break;
-
- /* Visit the next level */
- block_offset_in_level %= fs->inode_blocks_per_level[level];
- offset_in_block =
- block_offset_in_level / fs->inode_blocks_per_level[level - 1];
- }
-
- return EOK;
+ /* Handle simple case when we are dealing with direct reference */
+ if (iblock < EXT4_INODE_DIRECT_BLOCK_COUNT) {
+ ext4_inode_set_direct_block(inode_ref->inode, (uint32_t)iblock,
+ fblock);
+ inode_ref->dirty = true;
+
+ return EOK;
+ }
+
+ /* Determine the indirection level needed to get the desired block */
+ unsigned int level = 0;
+ unsigned int i;
+ for (i = 1; i < 4; i++) {
+ if (iblock < fs->inode_block_limits[i]) {
+ level = i;
+ break;
+ }
+ }
+
+ if (level == 0)
+ return EIO;
+
+ uint32_t block_size = ext4_sb_get_block_size(&fs->sb);
+
+ /* Compute offsets for the topmost level */
+ uint64_t block_offset_in_level =
+ iblock - fs->inode_block_limits[level - 1];
+ uint32_t current_block =
+ ext4_inode_get_indirect_block(inode_ref->inode, level - 1);
+ uint32_t offset_in_block =
+ block_offset_in_level / fs->inode_blocks_per_level[level - 1];
+
+ uint32_t new_block_addr;
+
+ struct ext4_block block;
+ struct ext4_block new_block;
+
+ /* Is needed to allocate indirect block on the i-node level */
+ if (current_block == 0) {
+ /* Allocate new indirect block */
+ int rc = ext4_balloc_alloc_block(inode_ref, &new_block_addr);
+ if (rc != EOK)
+ return rc;
+
+ /* Update i-node */
+ ext4_inode_set_indirect_block(inode_ref->inode, level - 1,
+ new_block_addr);
+ inode_ref->dirty = true;
+
+ /* Load newly allocated block */
+ rc = ext4_block_get(fs->bdev, &new_block, new_block_addr);
+ if (rc != EOK) {
+ ext4_balloc_free_block(inode_ref, new_block_addr);
+ return rc;
+ }
+
+ /* Initialize new block */
+ memset(new_block.data, 0, block_size);
+ new_block.dirty = true;
+
+ /* Put back the allocated block */
+ rc = ext4_block_set(fs->bdev, &new_block);
+ if (rc != EOK)
+ return rc;
+
+ current_block = new_block_addr;
+ }
+
+ /*
+ * Navigate through other levels, until we find the block number
+ * or find null reference meaning we are dealing with sparse file
+ */
+ while (level > 0) {
+ int rc = ext4_block_get(fs->bdev, &block, current_block);
+ if (rc != EOK)
+ return rc;
+
+ current_block =
+ to_le32(((uint32_t *)block.data)[offset_in_block]);
+
+ if ((level > 1) && (current_block == 0)) {
+ /* Allocate new block */
+ rc =
+ ext4_balloc_alloc_block(inode_ref, &new_block_addr);
+ if (rc != EOK) {
+ ext4_block_set(fs->bdev, &block);
+ return rc;
+ }
+
+ /* Load newly allocated block */
+ rc = ext4_block_get(fs->bdev, &new_block,
+ new_block_addr);
+
+ if (rc != EOK) {
+ ext4_block_set(fs->bdev, &block);
+ return rc;
+ }
+
+ /* Initialize allocated block */
+ memset(new_block.data, 0, block_size);
+ new_block.dirty = true;
+
+ rc = ext4_block_set(fs->bdev, &new_block);
+ if (rc != EOK) {
+ ext4_block_set(fs->bdev, &block);
+ return rc;
+ }
+
+ /* Write block address to the parent */
+ ((uint32_t *)block.data)[offset_in_block] =
+ to_le32(new_block_addr);
+ block.dirty = true;
+ current_block = new_block_addr;
+ }
+
+ /* Will be finished, write the fblock address */
+ if (level == 1) {
+ ((uint32_t *)block.data)[offset_in_block] =
+ to_le32(fblock);
+ block.dirty = true;
+ }
+
+ rc = ext4_block_set(fs->bdev, &block);
+ if (rc != EOK)
+ return rc;
+
+ level--;
+
+ /*
+ * If we are on the last level, break here as
+ * there is no next level to visit
+ */
+ if (level == 0)
+ break;
+
+ /* Visit the next level */
+ block_offset_in_level %= fs->inode_blocks_per_level[level];
+ offset_in_block = block_offset_in_level /
+ fs->inode_blocks_per_level[level - 1];
+ }
+
+ return EOK;
}
int ext4_fs_release_inode_block(struct ext4_inode_ref *inode_ref,
- uint32_t iblock)
+ uint32_t iblock)
{
- uint32_t fblock;
-
- struct ext4_fs *fs = inode_ref->fs;
-
- /* Extents are handled otherwise = there is not support in this function */
- ext4_assert(
- !(ext4_sb_has_feature_incompatible(&fs->sb,
- EXT4_FEATURE_INCOMPAT_EXTENTS) &&
- (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))));
-
- struct ext4_inode *inode = inode_ref->inode;
-
- /* Handle simple case when we are dealing with direct reference */
- if (iblock < EXT4_INODE_DIRECT_BLOCK_COUNT) {
- fblock = ext4_inode_get_direct_block(inode, iblock);
-
- /* Sparse file */
- if (fblock == 0)
- return EOK;
-
- ext4_inode_set_direct_block(inode, iblock, 0);
- return ext4_balloc_free_block(inode_ref, fblock);
- }
-
- /* Determine the indirection level needed to get the desired block */
- unsigned int level = 0;
- unsigned int i;
- for (i = 1; i < 4; i++) {
- if (iblock < fs->inode_block_limits[i]) {
- level = i;
- break;
- }
- }
-
- if (level == 0)
- return EIO;
-
- /* Compute offsets for the topmost level */
- uint64_t block_offset_in_level = iblock - fs->inode_block_limits[level - 1];
- uint32_t current_block = ext4_inode_get_indirect_block(inode, level - 1);
- uint32_t offset_in_block =
- block_offset_in_level / fs->inode_blocks_per_level[level - 1];
-
- /*
- * Navigate through other levels, until we find the block number
- * or find null reference meaning we are dealing with sparse file
- */
- struct ext4_block block;
-
- while (level > 0) {
-
- /* Sparse check */
- if (current_block == 0)
- return EOK;
-
- int rc = ext4_block_get(fs->bdev, &block, current_block);
- if (rc != EOK)
- return rc;
-
- current_block = to_le32(((uint32_t *)block.data)[offset_in_block]);
-
- /* Set zero if physical data block address found */
- if (level == 1) {
- ((uint32_t *)block.data)[offset_in_block] = to_le32(0);
- block.dirty = true;
- }
-
- rc = ext4_block_set(fs->bdev, &block);
- if (rc != EOK)
- return rc;
-
- level--;
-
- /*
- * If we are on the last level, break here as
- * there is no next level to visit
- */
- if (level == 0)
- break;
-
- /* Visit the next level */
- block_offset_in_level %= fs->inode_blocks_per_level[level];
- offset_in_block =
- block_offset_in_level / fs->inode_blocks_per_level[level - 1];
- }
-
- fblock = current_block;
- if (fblock == 0)
- return EOK;
-
- /* Physical block is not referenced, it can be released */
- return ext4_balloc_free_block(inode_ref, fblock);
+ uint32_t fblock;
+
+ struct ext4_fs *fs = inode_ref->fs;
+
+ /* Extents are handled otherwise = there is not support in this function
+ */
+ ext4_assert(!(
+ ext4_sb_has_feature_incompatible(&fs->sb,
+ EXT4_FEATURE_INCOMPAT_EXTENTS) &&
+ (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))));
+
+ struct ext4_inode *inode = inode_ref->inode;
+
+ /* Handle simple case when we are dealing with direct reference */
+ if (iblock < EXT4_INODE_DIRECT_BLOCK_COUNT) {
+ fblock = ext4_inode_get_direct_block(inode, iblock);
+
+ /* Sparse file */
+ if (fblock == 0)
+ return EOK;
+
+ ext4_inode_set_direct_block(inode, iblock, 0);
+ return ext4_balloc_free_block(inode_ref, fblock);
+ }
+
+ /* Determine the indirection level needed to get the desired block */
+ unsigned int level = 0;
+ unsigned int i;
+ for (i = 1; i < 4; i++) {
+ if (iblock < fs->inode_block_limits[i]) {
+ level = i;
+ break;
+ }
+ }
+
+ if (level == 0)
+ return EIO;
+
+ /* Compute offsets for the topmost level */
+ uint64_t block_offset_in_level =
+ iblock - fs->inode_block_limits[level - 1];
+ uint32_t current_block =
+ ext4_inode_get_indirect_block(inode, level - 1);
+ uint32_t offset_in_block =
+ block_offset_in_level / fs->inode_blocks_per_level[level - 1];
+
+ /*
+ * Navigate through other levels, until we find the block number
+ * or find null reference meaning we are dealing with sparse file
+ */
+ struct ext4_block block;
+
+ while (level > 0) {
+
+ /* Sparse check */
+ if (current_block == 0)
+ return EOK;
+
+ int rc = ext4_block_get(fs->bdev, &block, current_block);
+ if (rc != EOK)
+ return rc;
+
+ current_block =
+ to_le32(((uint32_t *)block.data)[offset_in_block]);
+
+ /* Set zero if physical data block address found */
+ if (level == 1) {
+ ((uint32_t *)block.data)[offset_in_block] = to_le32(0);
+ block.dirty = true;
+ }
+
+ rc = ext4_block_set(fs->bdev, &block);
+ if (rc != EOK)
+ return rc;
+
+ level--;
+
+ /*
+ * If we are on the last level, break here as
+ * there is no next level to visit
+ */
+ if (level == 0)
+ break;
+
+ /* Visit the next level */
+ block_offset_in_level %= fs->inode_blocks_per_level[level];
+ offset_in_block = block_offset_in_level /
+ fs->inode_blocks_per_level[level - 1];
+ }
+
+ fblock = current_block;
+ if (fblock == 0)
+ return EOK;
+
+ /* Physical block is not referenced, it can be released */
+ return ext4_balloc_free_block(inode_ref, fblock);
}
int ext4_fs_append_inode_block(struct ext4_inode_ref *inode_ref,
- uint32_t *fblock, uint32_t *iblock)
+ uint32_t *fblock, uint32_t *iblock)
{
#if CONFIG_EXTENT_ENABLE
- /* Handle extents separately */
- if ((ext4_sb_has_feature_incompatible(&inode_ref->fs->sb,
- EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
- (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
- return ext4_extent_append_block(inode_ref, iblock, fblock, true);
- }
+ /* Handle extents separately */
+ if ((ext4_sb_has_feature_incompatible(&inode_ref->fs->sb,
+ EXT4_FEATURE_INCOMPAT_EXTENTS)) &&
+ (ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_EXTENTS))) {
+ return ext4_extent_append_block(inode_ref, iblock, fblock,
+ true);
+ }
#endif
- struct ext4_sblock *sb = &inode_ref->fs->sb;
+ struct ext4_sblock *sb = &inode_ref->fs->sb;
- /* Compute next block index and allocate data block */
- uint64_t inode_size = ext4_inode_get_size(sb, inode_ref->inode);
- uint32_t block_size = ext4_sb_get_block_size(sb);
+ /* Compute next block index and allocate data block */
+ uint64_t inode_size = ext4_inode_get_size(sb, inode_ref->inode);
+ uint32_t block_size = ext4_sb_get_block_size(sb);
- /* Align size i-node size */
- if ((inode_size % block_size) != 0)
- inode_size += block_size - (inode_size % block_size);
+ /* Align size i-node size */
+ if ((inode_size % block_size) != 0)
+ inode_size += block_size - (inode_size % block_size);
- /* Logical blocks are numbered from 0 */
- uint32_t new_block_idx = inode_size / block_size;
+ /* Logical blocks are numbered from 0 */
+ uint32_t new_block_idx = inode_size / block_size;
- /* Allocate new physical block */
- uint32_t phys_block;
- int rc = ext4_balloc_alloc_block(inode_ref, &phys_block);
- if (rc != EOK)
- return rc;
+ /* Allocate new physical block */
+ uint32_t phys_block;
+ int rc = ext4_balloc_alloc_block(inode_ref, &phys_block);
+ if (rc != EOK)
+ return rc;
- /* Add physical block address to the i-node */
- rc = ext4_fs_set_inode_data_block_index(inode_ref, new_block_idx,
- phys_block);
- if (rc != EOK) {
- ext4_balloc_free_block(inode_ref, phys_block);
- return rc;
- }
+ /* Add physical block address to the i-node */
+ rc = ext4_fs_set_inode_data_block_index(inode_ref, new_block_idx,
+ phys_block);
+ if (rc != EOK) {
+ ext4_balloc_free_block(inode_ref, phys_block);
+ return rc;
+ }
- /* Update i-node */
- ext4_inode_set_size(inode_ref->inode, inode_size + block_size);
- inode_ref->dirty = true;
+ /* Update i-node */
+ ext4_inode_set_size(inode_ref->inode, inode_size + block_size);
+ inode_ref->dirty = true;
- *fblock = phys_block;
- *iblock = new_block_idx;
+ *fblock = phys_block;
+ *iblock = new_block_idx;
- return EOK;
+ return EOK;
}
void ext4_fs_inode_links_count_inc(struct ext4_inode_ref *inode_ref)
{
- uint16_t link;
- if (!ext4_inode_is_type(&inode_ref->fs->sb, inode_ref->inode,
- EXT4_INODE_MODE_DIRECTORY)) {
- ext4_inode_set_links_count(inode_ref->inode, 0);
- return;
- }
-
- link = ext4_inode_get_links_count(inode_ref->inode);
- link++;
- ext4_inode_set_links_count(inode_ref->inode, link);
-
- bool is_dx = ext4_sb_has_feature_compatible(
- &inode_ref->fs->sb, EXT4_FEATURE_COMPAT_DIR_INDEX) &&
- ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_INDEX);
-
- if (is_dx && link > 1) {
- if (link >= EXT4_LINK_MAX || link == 2) {
- ext4_inode_set_links_count(inode_ref->inode, 1);
-
- uint32_t v = ext4_get32(&inode_ref->fs->sb, features_read_only);
- v |= EXT4_FEATURE_RO_COMPAT_DIR_NLINK;
- ext4_set32(&inode_ref->fs->sb, features_read_only, v);
- }
- }
+ uint16_t link;
+
+ link = ext4_inode_get_links_count(inode_ref->inode);
+ link++;
+ ext4_inode_set_links_count(inode_ref->inode, link);
+
+ bool is_dx =
+ ext4_sb_has_feature_compatible(&inode_ref->fs->sb,
+ EXT4_FEATURE_COMPAT_DIR_INDEX) &&
+ ext4_inode_has_flag(inode_ref->inode, EXT4_INODE_FLAG_INDEX);
+
+ if (is_dx && link > 1) {
+ if (link >= EXT4_LINK_MAX || link == 2) {
+ ext4_inode_set_links_count(inode_ref->inode, 1);
+
+ uint32_t v =
+ ext4_get32(&inode_ref->fs->sb, features_read_only);
+ v |= EXT4_FEATURE_RO_COMPAT_DIR_NLINK;
+ ext4_set32(&inode_ref->fs->sb, features_read_only, v);
+ }
+ }
}
void ext4_fs_inode_links_count_dec(struct ext4_inode_ref *inode_ref)
{
- if (!ext4_inode_is_type(&inode_ref->fs->sb, inode_ref->inode,
- EXT4_INODE_MODE_DIRECTORY)) {
- ext4_inode_set_links_count(inode_ref->inode, 0);
- return;
- }
-
- uint16_t links = ext4_inode_get_links_count(inode_ref->inode);
-
- if (links > 2)
- ext4_inode_set_links_count(inode_ref->inode, links - 1);
+ uint16_t links = ext4_inode_get_links_count(inode_ref->inode);
+ if (!ext4_inode_is_type(&inode_ref->fs->sb, inode_ref->inode,
+ EXT4_INODE_MODE_DIRECTORY)) {
+ if (links > 0)
+ ext4_inode_set_links_count(inode_ref->inode, links - 1);
+ return;
+ }
+
+ if (links > 2)
+ ext4_inode_set_links_count(inode_ref->inode, links - 1);
}
/**
projects / lwext4.git / blobdiff