Sorry for long delay.
Namjae Jeon <linkinj...@gmail.com> writes:
> + if (mode & FALLOC_FL_KEEP_SIZE) {
> + /* First compute the number of clusters to be allocated */
> + mm_bytes = offset + len - round_up(MSDOS_I(inode)->mmu_private,
> + sbi->cluster_size);
This should use ->i_disksize?
[...]
> + /* Release unwritten fallocated blocks on inode eviction. */
> + if (MSDOS_I(inode)->mmu_private < MSDOS_I(inode)->i_disksize) {
> + int err;
> + fat_truncate_blocks(inode, MSDOS_I(inode)->mmu_private);
> + /* Fallocate results in updating the i_start/iogstart
> + * for the zero byte file. So, make it return to
> + * original state during evict and commit it
> + * synchrnously to avoid any corruption on the next
> + * access to the cluster chain for the file.
> + */
> + err = fat_sync_inode(inode);
Ah, good catch. We have to update i_size. I was forgetting about this.
Well, sync inode unconditionally would not be good. Maybe, we better to
use __fat_write_inode() with inode_needs_sync() or such.
--
OGAWA Hirofumi <hirof...@mail.parknet.co.jp>
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