summaryrefslogtreecommitdiff
path: root/fs/ext4/ext4_common.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ext4/ext4_common.c')
-rw-r--r--fs/ext4/ext4_common.c125
1 files changed, 65 insertions, 60 deletions
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index b745d8d450..90e7602e2a 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -393,7 +393,7 @@ uint16_t ext4fs_checksum_update(uint32_t i)
uint16_t crc = 0;
__le32 le32_i = cpu_to_le32(i);
- desc = (struct ext2_block_group *)&fs->bgd[i];
+ desc = ext4fs_get_group_descriptor(fs, i);
if (le32_to_cpu(fs->sb->feature_ro_compat) & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
int offset = offsetof(struct ext2_block_group, bg_checksum);
@@ -933,39 +933,41 @@ uint32_t ext4fs_get_new_blk_no(void)
char *zero_buffer = zalloc(fs->blksz);
if (!journal_buffer || !zero_buffer)
goto fail;
- struct ext2_block_group *bgd = (struct ext2_block_group *)fs->gdtable;
if (fs->first_pass_bbmap == 0) {
for (i = 0; i < fs->no_blkgrp; i++) {
- if (le16_to_cpu(bgd[i].free_blocks)) {
- if (le16_to_cpu(bgd[i].bg_flags) & EXT4_BG_BLOCK_UNINIT) {
- uint16_t new_flags;
- put_ext4((uint64_t)le32_to_cpu(bgd[i].block_id) * fs->blksz,
- zero_buffer, fs->blksz);
- new_flags = le16_to_cpu(bgd[i].bg_flags) & ~EXT4_BG_BLOCK_UNINIT;
- bgd[i].bg_flags = cpu_to_le16(new_flags);
+ struct ext2_block_group *bgd = NULL;
+ bgd = ext4fs_get_group_descriptor(fs, i);
+ if (ext4fs_bg_get_free_blocks(bgd, fs)) {
+ uint16_t bg_flags = ext4fs_bg_get_flags(bgd);
+ uint64_t b_bitmap_blk =
+ ext4fs_bg_get_block_id(bgd, fs);
+ if (bg_flags & EXT4_BG_BLOCK_UNINIT) {
memcpy(fs->blk_bmaps[i], zero_buffer,
fs->blksz);
+ put_ext4(b_bitmap_blk * fs->blksz,
+ fs->blk_bmaps[i], fs->blksz);
+ bg_flags &= ~EXT4_BG_BLOCK_UNINIT;
+ ext4fs_bg_set_flags(bgd, bg_flags);
}
fs->curr_blkno =
_get_new_blk_no(fs->blk_bmaps[i]);
if (fs->curr_blkno == -1)
- /* if block bitmap is completely fill */
+ /* block bitmap is completely filled */
continue;
fs->curr_blkno = fs->curr_blkno +
(i * fs->blksz * 8);
fs->first_pass_bbmap++;
- ext4fs_bg_free_blocks_dec(&bgd[i]);
+ ext4fs_bg_free_blocks_dec(bgd);
ext4fs_sb_free_blocks_dec(fs->sb);
- status = ext4fs_devread(
- (lbaint_t)le32_to_cpu(bgd[i].block_id) *
- fs->sect_perblk, 0,
- fs->blksz,
+ status = ext4fs_devread(b_bitmap_blk *
+ fs->sect_perblk,
+ 0, fs->blksz,
journal_buffer);
if (status == 0)
goto fail;
if (ext4fs_log_journal(journal_buffer,
- le32_to_cpu(bgd[i].block_id)))
+ b_bitmap_blk))
goto fail;
goto success;
} else {
@@ -992,7 +994,9 @@ restart:
if (bg_idx >= fs->no_blkgrp)
goto fail;
- if (bgd[bg_idx].free_blocks == 0) {
+ struct ext2_block_group *bgd = NULL;
+ bgd = ext4fs_get_group_descriptor(fs, bg_idx);
+ if (ext4fs_bg_get_free_blocks(bgd, fs) == 0) {
debug("block group %u is full. Skipping\n", bg_idx);
fs->curr_blkno = (bg_idx + 1) * blk_per_grp;
if (fs->blksz == 1024)
@@ -1000,13 +1004,14 @@ restart:
goto restart;
}
- if (le16_to_cpu(bgd[bg_idx].bg_flags) & EXT4_BG_BLOCK_UNINIT) {
- uint16_t new_flags;
- put_ext4((uint64_t)le32_to_cpu(bgd[bg_idx].block_id) * fs->blksz,
- zero_buffer, fs->blksz);
+ uint16_t bg_flags = ext4fs_bg_get_flags(bgd);
+ uint64_t b_bitmap_blk = ext4fs_bg_get_block_id(bgd, fs);
+ if (bg_flags & EXT4_BG_BLOCK_UNINIT) {
memcpy(fs->blk_bmaps[bg_idx], zero_buffer, fs->blksz);
- new_flags = le16_to_cpu(bgd[bg_idx].bg_flags) & ~EXT4_BG_BLOCK_UNINIT;
- bgd[bg_idx].bg_flags = cpu_to_le16(new_flags);
+ put_ext4(b_bitmap_blk * fs->blksz,
+ zero_buffer, fs->blksz);
+ bg_flags &= ~EXT4_BG_BLOCK_UNINIT;
+ ext4fs_bg_set_flags(bgd, bg_flags);
}
if (ext4fs_set_block_bmap(fs->curr_blkno, fs->blk_bmaps[bg_idx],
@@ -1019,19 +1024,16 @@ restart:
/* journal backup */
if (prev_bg_bitmap_index != bg_idx) {
- status = ext4fs_devread(
- (lbaint_t)le32_to_cpu(bgd[bg_idx].block_id)
- * fs->sect_perblk,
+ status = ext4fs_devread(b_bitmap_blk * fs->sect_perblk,
0, fs->blksz, journal_buffer);
if (status == 0)
goto fail;
- if (ext4fs_log_journal(journal_buffer,
- le32_to_cpu(bgd[bg_idx].block_id)))
+ if (ext4fs_log_journal(journal_buffer, b_bitmap_blk))
goto fail;
prev_bg_bitmap_index = bg_idx;
}
- ext4fs_bg_free_blocks_dec(&bgd[bg_idx]);
+ ext4fs_bg_free_blocks_dec(bgd);
ext4fs_sb_free_blocks_dec(fs->sb);
goto success;
}
@@ -1059,46 +1061,49 @@ int ext4fs_get_new_inode_no(void)
char *zero_buffer = zalloc(fs->blksz);
if (!journal_buffer || !zero_buffer)
goto fail;
- struct ext2_block_group *bgd = (struct ext2_block_group *)fs->gdtable;
int has_gdt_chksum = le32_to_cpu(fs->sb->feature_ro_compat) &
EXT4_FEATURE_RO_COMPAT_GDT_CSUM ? 1 : 0;
if (fs->first_pass_ibmap == 0) {
for (i = 0; i < fs->no_blkgrp; i++) {
- if (bgd[i].free_inodes) {
+ uint32_t free_inodes;
+ struct ext2_block_group *bgd = NULL;
+ bgd = ext4fs_get_group_descriptor(fs, i);
+ free_inodes = ext4fs_bg_get_free_inodes(bgd, fs);
+ if (free_inodes) {
+ uint16_t bg_flags = ext4fs_bg_get_flags(bgd);
+ uint64_t i_bitmap_blk =
+ ext4fs_bg_get_inode_id(bgd, fs);
if (has_gdt_chksum)
- bgd[i].bg_itable_unused =
- bgd[i].free_inodes;
- if (le16_to_cpu(bgd[i].bg_flags) & EXT4_BG_INODE_UNINIT) {
- int new_flags;
- put_ext4((uint64_t)le32_to_cpu(bgd[i].inode_id) * fs->blksz,
+ bgd->bg_itable_unused = free_inodes;
+ if (bg_flags & EXT4_BG_INODE_UNINIT) {
+ put_ext4(i_bitmap_blk * fs->blksz,
zero_buffer, fs->blksz);
- new_flags = le16_to_cpu(bgd[i].bg_flags) & ~EXT4_BG_INODE_UNINIT;
- bgd[i].bg_flags = cpu_to_le16(new_flags);
+ bg_flags &= ~EXT4_BG_INODE_UNINIT;
+ ext4fs_bg_set_flags(bgd, bg_flags);
memcpy(fs->inode_bmaps[i],
zero_buffer, fs->blksz);
}
fs->curr_inode_no =
_get_new_inode_no(fs->inode_bmaps[i]);
if (fs->curr_inode_no == -1)
- /* if block bitmap is completely fill */
+ /* inode bitmap is completely filled */
continue;
fs->curr_inode_no = fs->curr_inode_no +
(i * inodes_per_grp);
fs->first_pass_ibmap++;
- ext4fs_bg_free_inodes_dec(&bgd[i]);
+ ext4fs_bg_free_inodes_dec(bgd);
if (has_gdt_chksum)
- ext4fs_bg_itable_unused_dec(&bgd[i]);
+ ext4fs_bg_itable_unused_dec(bgd);
ext4fs_sb_free_inodes_dec(fs->sb);
- status = ext4fs_devread(
- (lbaint_t)le32_to_cpu(bgd[i].inode_id) *
- fs->sect_perblk, 0,
- fs->blksz,
+ status = ext4fs_devread(i_bitmap_blk *
+ fs->sect_perblk,
+ 0, fs->blksz,
journal_buffer);
if (status == 0)
goto fail;
if (ext4fs_log_journal(journal_buffer,
- le32_to_cpu(bgd[i].inode_id)))
+ i_bitmap_blk))
goto fail;
goto success;
} else
@@ -1110,12 +1115,16 @@ restart:
fs->curr_inode_no++;
/* get the blockbitmap index respective to blockno */
ibmap_idx = fs->curr_inode_no / inodes_per_grp;
- if (le16_to_cpu(bgd[ibmap_idx].bg_flags) & EXT4_BG_INODE_UNINIT) {
- int new_flags;
- put_ext4((uint64_t)le32_to_cpu(bgd[ibmap_idx].inode_id) * fs->blksz,
+ struct ext2_block_group *bgd =
+ ext4fs_get_group_descriptor(fs, ibmap_idx);
+ uint16_t bg_flags = ext4fs_bg_get_flags(bgd);
+ uint64_t i_bitmap_blk = ext4fs_bg_get_inode_id(bgd, fs);
+
+ if (bg_flags & EXT4_BG_INODE_UNINIT) {
+ put_ext4(i_bitmap_blk * fs->blksz,
zero_buffer, fs->blksz);
- new_flags = le16_to_cpu(bgd[ibmap_idx].bg_flags) & ~EXT4_BG_INODE_UNINIT;
- bgd[ibmap_idx].bg_flags = cpu_to_le16(new_flags);
+ bg_flags &= ~EXT4_BG_INODE_UNINIT;
+ ext4fs_bg_set_flags(bgd, bg_flags);
memcpy(fs->inode_bmaps[ibmap_idx], zero_buffer,
fs->blksz);
}
@@ -1130,22 +1139,18 @@ restart:
/* journal backup */
if (prev_inode_bitmap_index != ibmap_idx) {
- memset(journal_buffer, '\0', fs->blksz);
- status = ext4fs_devread(
- (lbaint_t)le32_to_cpu(bgd[ibmap_idx].inode_id)
- * fs->sect_perblk,
+ status = ext4fs_devread(i_bitmap_blk * fs->sect_perblk,
0, fs->blksz, journal_buffer);
if (status == 0)
goto fail;
if (ext4fs_log_journal(journal_buffer,
- le32_to_cpu(bgd[ibmap_idx].inode_id)))
+ le32_to_cpu(bgd->inode_id)))
goto fail;
prev_inode_bitmap_index = ibmap_idx;
}
- ext4fs_bg_free_inodes_dec(&bgd[ibmap_idx]);
+ ext4fs_bg_free_inodes_dec(bgd);
if (has_gdt_chksum)
- bgd[ibmap_idx].bg_itable_unused =
- bgd[ibmap_idx].free_inodes;
+ bgd->bg_itable_unused = bgd->free_inodes;
ext4fs_sb_free_inodes_dec(fs->sb);
goto success;
}
@@ -1561,7 +1566,7 @@ int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode)
return 0;
inodes_per_block = EXT2_BLOCK_SIZE(data) / fs->inodesz;
- blkno = le32_to_cpu(blkgrp.inode_table_id) +
+ 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;
/* Read the inode. */
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-12 09:09:56 +0000