ext4: Respect group descriptor size when adjusting free counts

[u-boot] / fs / ext4 / ext4_common.c

diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index 90e7602e2aa9711ed7072b56a2c677f7bd6d72ab..1336068f9c2eae161a921c602ec6164d0d91d960 100644 (file)
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -60,22 +60,51 @@ static inline void ext4fs_sb_free_inodes_dec(struct ext2_sblock *sb)
 
 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)
@@ -958,7 +987,7 @@ uint32_t ext4fs_get_new_blk_no(void)
                                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,
@@ -1033,7 +1062,7 @@ restart:
 
                        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;
        }
@@ -1092,9 +1121,9 @@ int ext4fs_get_new_inode_no(void)
                                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,
@@ -1148,7 +1177,7 @@ restart:
                                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);