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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - fs/ext4/truncate.h
2 * linux/fs/ext4/truncate.h
4 * Common inline functions needed for truncate support
8 * Truncate blocks that were not used by write. We have to truncate the
9 * pagecache as well so that corresponding buffers get properly unmapped.
11 static inline void ext4_truncate_failed_write(struct inode
*inode
)
13 truncate_inode_pages(inode
->i_mapping
, inode
->i_size
);
18 * Work out how many blocks we need to proceed with the next chunk of a
19 * truncate transaction.
21 static inline unsigned long ext4_blocks_for_truncate(struct inode
*inode
)
25 needed
= inode
->i_blocks
>> (inode
->i_sb
->s_blocksize_bits
- 9);
27 /* Give ourselves just enough room to cope with inodes in which
28 * i_blocks is corrupt: we've seen disk corruptions in the past
29 * which resulted in random data in an inode which looked enough
30 * like a regular file for ext4 to try to delete it. Things
31 * will go a bit crazy if that happens, but at least we should
32 * try not to panic the whole kernel. */
36 /* But we need to bound the transaction so we don't overflow the
38 if (needed
> EXT4_MAX_TRANS_DATA
)
39 needed
= EXT4_MAX_TRANS_DATA
;
41 return EXT4_DATA_TRANS_BLOCKS(inode
->i_sb
) + needed
;