resize.c (577f99c1d08cf9cbdafd4e858dd13ff04d855090) resize.c (e8546d0615542684ca02ba03edebec1a503beb6b)
1/*
2 * linux/fs/ext4/resize.c
3 *
4 * Support for resizing an ext4 filesystem while it is mounted.
5 *
6 * Copyright (C) 2001, 2002 Andreas Dilger <adilger@clusterfs.com>
7 *
8 * This could probably be made into a module, because it is not often in use.

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497 o_group_desc = EXT4_SB(sb)->s_group_desc;
498 memcpy(n_group_desc, o_group_desc,
499 EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
500 n_group_desc[gdb_num] = *primary;
501 EXT4_SB(sb)->s_group_desc = n_group_desc;
502 EXT4_SB(sb)->s_gdb_count++;
503 kfree(o_group_desc);
504
1/*
2 * linux/fs/ext4/resize.c
3 *
4 * Support for resizing an ext4 filesystem while it is mounted.
5 *
6 * Copyright (C) 2001, 2002 Andreas Dilger <adilger@clusterfs.com>
7 *
8 * This could probably be made into a module, because it is not often in use.

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497 o_group_desc = EXT4_SB(sb)->s_group_desc;
498 memcpy(n_group_desc, o_group_desc,
499 EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
500 n_group_desc[gdb_num] = *primary;
501 EXT4_SB(sb)->s_group_desc = n_group_desc;
502 EXT4_SB(sb)->s_gdb_count++;
503 kfree(o_group_desc);
504
505 es->s_reserved_gdt_blocks =
506 cpu_to_le16(le16_to_cpu(es->s_reserved_gdt_blocks) - 1);
505 le16_add_cpu(&es->s_reserved_gdt_blocks, -1);
507 ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
508
509 return 0;
510
511exit_inode:
512 //ext4_journal_release_buffer(handle, iloc.bh);
513 brelse(iloc.bh);
514exit_dindj:

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872 *
873 * We always allocate group-by-group, then block-by-block or
874 * inode-by-inode within a group, so enabling these
875 * blocks/inodes before the group is live won't actually let us
876 * allocate the new space yet.
877 */
878 ext4_blocks_count_set(es, ext4_blocks_count(es) +
879 input->blocks_count);
506 ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
507
508 return 0;
509
510exit_inode:
511 //ext4_journal_release_buffer(handle, iloc.bh);
512 brelse(iloc.bh);
513exit_dindj:

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871 *
872 * We always allocate group-by-group, then block-by-block or
873 * inode-by-inode within a group, so enabling these
874 * blocks/inodes before the group is live won't actually let us
875 * allocate the new space yet.
876 */
877 ext4_blocks_count_set(es, ext4_blocks_count(es) +
878 input->blocks_count);
880 es->s_inodes_count = cpu_to_le32(le32_to_cpu(es->s_inodes_count) +
881 EXT4_INODES_PER_GROUP(sb));
879 le32_add_cpu(&es->s_inodes_count, EXT4_INODES_PER_GROUP(sb));
882
883 /*
884 * We need to protect s_groups_count against other CPUs seeing
885 * inconsistent state in the superblock.
886 *
887 * The precise rules we use are:
888 *
889 * * Writers of s_groups_count *must* hold lock_super

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881 /*
882 * We need to protect s_groups_count against other CPUs seeing
883 * inconsistent state in the superblock.
884 *
885 * The precise rules we use are:
886 *
887 * * Writers of s_groups_count *must* hold lock_super

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