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authorLinus Torvalds <torvalds@linux-foundation.org>2019-11-30 21:53:02 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-11-30 21:53:02 +0300
commit50b8b3f85a01543fb82d3bb9bfe7d06659522c70 (patch)
tree178bcf210025fec174a9a6fa9a094283f3fcc3ad /Documentation/filesystems/fscrypt.rst
parentf112a2fd1f5999c6029551f901952392d900cf99 (diff)
parentdfdeeb41fb08fbe11d3cfefba9c0fcd00c95a36d (diff)
downloadlinux-50b8b3f85a01543fb82d3bb9bfe7d06659522c70.tar.xz
Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o: "This merge window saw the the following new featuers added to ext4: - Direct I/O via iomap (required the iomap-for-next branch from Darrick as a prereq). - Support for using dioread-nolock where the block size < page size. - Support for encryption for file systems where the block size < page size. - Rework of journal credits handling so a revoke-heavy workload will not cause the journal to run out of space. - Replace bit-spinlocks with spinlocks in jbd2 Also included were some bug fixes and cleanups, mostly to clean up corner cases from fuzzed file systems and error path handling" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (59 commits) ext4: work around deleting a file with i_nlink == 0 safely ext4: add more paranoia checking in ext4_expand_extra_isize handling jbd2: make jbd2_handle_buffer_credits() handle reserved handles ext4: fix a bug in ext4_wait_for_tail_page_commit ext4: bio_alloc with __GFP_DIRECT_RECLAIM never fails ext4: code cleanup for get_next_id ext4: fix leak of quota reservations ext4: remove unused variable warning in parse_options() ext4: Enable encryption for subpage-sized blocks fs/buffer.c: support fscrypt in block_read_full_page() ext4: Add error handling for io_end_vec struct allocation jbd2: Fine tune estimate of necessary descriptor blocks jbd2: Provide trace event for handle restarts ext4: Reserve revoke credits for freed blocks jbd2: Make credit checking more strict jbd2: Rename h_buffer_credits to h_total_credits jbd2: Reserve space for revoke descriptor blocks jbd2: Drop jbd2_space_needed() jbd2: Account descriptor blocks into t_outstanding_credits jbd2: Factor out common parts of stopping and restarting a handle ...
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diff --git a/Documentation/filesystems/fscrypt.rst b/Documentation/filesystems/fscrypt.rst
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--- a/Documentation/filesystems/fscrypt.rst
+++ b/Documentation/filesystems/fscrypt.rst
@@ -342,8 +342,8 @@ Contents encryption
-------------------
For file contents, each filesystem block is encrypted independently.
-Currently, only the case where the filesystem block size is equal to
-the system's page size (usually 4096 bytes) is supported.
+Starting from Linux kernel 5.5, encryption of filesystems with block
+size less than system's page size is supported.
Each block's IV is set to the logical block number within the file as
a little endian number, except that: