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ext4: add support for online resizing with bigalloc

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This patch adds support for online resizing on bigalloc file system by
implementing EXT4_IOC_RESIZE_FS ioctl. Old resize interfaces (add
block groups and extend last block group) are left untouched. Tests
performed with cluster sizes of 1, 2, 4 and 8 blocks (of size 4k) per
cluster. I will add these tests to xfstests.

Signed-off-by: Harshad Shirwadkar <harshads@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
harshads
2017-10-29 09:38:46 -04:00
committed by Theodore Ts'o
parent d98bf8cd11
commit d77147ff44
4 changed files with 84 additions and 58 deletions
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fs/ext4/ext4.h
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@@ -545,8 +545,8 @@ struct ext4_new_group_data {
__u64 inode_table;
__u32 blocks_count;
__u16 reserved_blocks;
__u16 unused;
__u32 free_blocks_count;
__u16 mdata_blocks;
__u32 free_clusters_count;
};
/* Indexes used to index group tables in ext4_new_group_data */