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f2fs crypto: add encryption support in read/write paths

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This patch adds encryption support in read and write paths.

Note that, in f2fs, we need to consider cleaning operation.
In cleaning procedure, we must avoid encrypting and decrypting written blocks.
So, this patch implements move_encrypted_block().

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2015-04-23 12:04:33 -07:00
parent fcc85a4d86
commit 4375a33664
8 changed files with 177 additions and 29 deletions
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fs/f2fs/file.c
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@@ -504,7 +504,7 @@ static int truncate_partial_data_page(struct inode *inode, u64 from,
truncate_out:
f2fs_wait_on_page_writeback(page, DATA);
zero_user(page, offset, PAGE_CACHE_SIZE - offset);
if (!cache_only)
if (!cache_only || !f2fs_encrypted_inode(inode) || !S_ISREG(inode->i_mode))
set_page_dirty(page);
f2fs_put_page(page, 1);
return 0;