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| author | Eric Biggers <ebiggers@google.com> | 2019-07-22 18:26:24 +0200 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2019-08-13 04:33:51 +0200 |
| commit | 22cfe4b48ccb5a3dbb92d6dcb88f396e0f400f74 (patch) | |
| tree | a542a34c4ff891e8b361b18c55602304e6487371 /fs/ext4/ext4.h | |
| parent | ext4: add basic fs-verity support (diff) | |
| download | linux-22cfe4b48ccb5a3dbb92d6dcb88f396e0f400f74.tar.xz linux-22cfe4b48ccb5a3dbb92d6dcb88f396e0f400f74.zip | |
ext4: add fs-verity read support
Make ext4_mpage_readpages() verify data as it is read from fs-verity
files, using the helper functions from fs/verity/.
To support both encryption and verity simultaneously, this required
refactoring the decryption workflow into a generic "post-read
processing" workflow which can do decryption, verification, or both.
The case where the ext4 block size is not equal to the PAGE_SIZE is not
supported yet, since in that case ext4_mpage_readpages() sometimes falls
back to block_read_full_page(), which does not support fs-verity yet.
Co-developed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 736972f46ea6..9c7f4036021b 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -3191,6 +3191,8 @@ static inline void ext4_set_de_type(struct super_block *sb, extern int ext4_mpage_readpages(struct address_space *mapping, struct list_head *pages, struct page *page, unsigned nr_pages, bool is_readahead); +extern int __init ext4_init_post_read_processing(void); +extern void ext4_exit_post_read_processing(void); /* symlink.c */ extern const struct inode_operations ext4_encrypted_symlink_inode_operations; |