diff options
| author | David Gstir <david@sigma-star.at> | 2016-11-13 22:20:46 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-11-13 18:55:21 -0500 |
| commit | 7821d4dd4589ce5af54f3e46d04a29439ba3c2e5 (patch) | |
| tree | c9c424077630d6bec61a22905e7fec2cef9a9a8f /fs/ext4 | |
| parent | b50f7b268bad8088dfe7579a65cd910d8cc5c40f (diff) | |
| download | blackbird-obmc-linux-7821d4dd4589ce5af54f3e46d04a29439ba3c2e5.tar.gz blackbird-obmc-linux-7821d4dd4589ce5af54f3e46d04a29439ba3c2e5.zip | |
fscrypt: Enable partial page encryption
Not all filesystems work on full pages, thus we should allow them to
hand partial pages to fscrypt for en/decryption.
Signed-off-by: David Gstir <david@sigma-star.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/inode.c | 6 | ||||
| -rw-r--r-- | fs/ext4/page-io.c | 2 |
2 files changed, 5 insertions, 3 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 4b7b842ec024..1d498c5e2990 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1166,7 +1166,8 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len, if (unlikely(err)) page_zero_new_buffers(page, from, to); else if (decrypt) - err = fscrypt_decrypt_page(page->mapping->host, page); + err = fscrypt_decrypt_page(page->mapping->host, page, + PAGE_SIZE, 0); return err; } #endif @@ -3743,8 +3744,9 @@ static int __ext4_block_zero_page_range(handle_t *handle, /* We expect the key to be set. */ BUG_ON(!fscrypt_has_encryption_key(inode)); BUG_ON(blocksize != PAGE_SIZE); + BUG_ON(!PageLocked(page)); WARN_ON_ONCE(fscrypt_decrypt_page(page->mapping->host, - page)); + page, PAGE_SIZE, 0)); } } if (ext4_should_journal_data(inode)) { diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 0094923e5ebf..3d1d3d0f4303 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -470,7 +470,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io, gfp_t gfp_flags = GFP_NOFS; retry_encrypt: - data_page = fscrypt_encrypt_page(inode, page, gfp_flags); + data_page = fscrypt_encrypt_page(inode, page, PAGE_SIZE, 0, gfp_flags); if (IS_ERR(data_page)) { ret = PTR_ERR(data_page); if (ret == -ENOMEM && wbc->sync_mode == WB_SYNC_ALL) { |
