[PATCH v4 20/46] btrfs: set file extent encryption excplicitly

Josef Bacik
2023-12-01T22:12:21Z

From: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>

This puts the long-preserved 1-byte encryption field to work, storing
whether the extent is encrypted. Update the tree-checker to allow for
the encryption bit to be set to our valid types.

Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/accessors.h | 2 ++
fs/btrfs/inode.c | 8 ++++++--
fs/btrfs/tree-checker.c | 8 +++++---
fs/btrfs/tree-log.c | 2 ++
include/uapi/linux/btrfs_tree.h | 8 +++++++-
5 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/fs/btrfs/accessors.h b/fs/btrfs/accessors.h
index aa0844535644..5aaf204fa55f 100644
--- a/fs/btrfs/accessors.h
+++ b/fs/btrfs/accessors.h
@@ -949,6 +949,8 @@ BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
struct btrfs_file_extent_item, disk_num_bytes, 64);
BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
struct btrfs_file_extent_item, compression, 8);
+BTRFS_SETGET_STACK_FUNCS(stack_file_extent_encryption,
+ struct btrfs_file_extent_item, encryption, 8);

BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 60d1e93c2567..f894f5b5e786 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3001,7 +3001,9 @@ static int insert_ordered_extent_file_extent(struct btrfs_trans_handle *trans,
btrfs_set_stack_file_extent_num_bytes(&stack_fi, num_bytes);
btrfs_set_stack_file_extent_ram_bytes(&stack_fi, ram_bytes);
btrfs_set_stack_file_extent_compression(&stack_fi, oe->compress_type);
- /* Encryption and other encoding is reserved and all 0 */
+ btrfs_set_stack_file_extent_encryption(&stack_fi,
+ BTRFS_ENCRYPTION_NONE);
+ /* Other encoding is reserved and always 0 */

/*
* For delalloc, when completing an ordered extent we update the inode's
@@ -9671,7 +9673,9 @@ static struct btrfs_trans_handle *insert_prealloc_file_extent(
btrfs_set_stack_file_extent_num_bytes(&stack_fi, len);
btrfs_set_stack_file_extent_ram_bytes(&stack_fi, len);
btrfs_set_stack_file_extent_compression(&stack_fi, BTRFS_COMPRESS_NONE);
- /* Encryption and other encoding is reserved and all 0 */
+ btrfs_set_stack_file_extent_encryption(&stack_fi,
+ BTRFS_ENCRYPTION_NONE);
+ /* Other encoding is reserved and always 0 */

qgroup_released = btrfs_qgroup_release_data(inode, file_offset, len);
if (qgroup_released < 0)
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 50fdc69fdddf..1af2c967436b 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -211,6 +211,7 @@ static int check_extent_data_item(struct extent_buffer *leaf,
u32 sectorsize = fs_info->sectorsize;
u32 item_size = btrfs_item_size(leaf, slot);
u64 extent_end;
+ u8 policy;

if (unlikely(!IS_ALIGNED(key->offset, sectorsize))) {
file_extent_err(leaf, slot,
@@ -262,10 +263,11 @@ static int check_extent_data_item(struct extent_buffer *leaf,
BTRFS_NR_COMPRESS_TYPES - 1);
return -EUCLEAN;
}
- if (unlikely(btrfs_file_extent_encryption(leaf, fi))) {
+ policy = btrfs_file_extent_encryption(leaf, fi);
+ if (unlikely(policy >= BTRFS_NR_ENCRYPTION_TYPES)) {
file_extent_err(leaf, slot,
- "invalid encryption for file extent, have %u expect 0",
- btrfs_file_extent_encryption(leaf, fi));
+ "invalid encryption for file extent, have %u expect range [0, %u]",
+ policy, BTRFS_NR_ENCRYPTION_TYPES - 1);
return -EUCLEAN;
}
if (btrfs_file_extent_type(leaf, fi) == BTRFS_FILE_EXTENT_INLINE) {
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 89d3dc769b15..36063dc39443 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -4627,6 +4627,7 @@ static int log_one_extent(struct btrfs_trans_handle *trans,
u64 extent_offset = em->start - em->orig_start;
u64 block_len;
int ret;
+ u8 encryption = BTRFS_ENCRYPTION_NONE;

btrfs_set_stack_file_extent_generation(&fi, trans->transid);
if (test_bit(EXTENT_FLAG_PREALLOC, &em->flags))
@@ -4648,6 +4649,7 @@ static int log_one_extent(struct btrfs_trans_handle *trans,
btrfs_set_stack_file_extent_num_bytes(&fi, em->len);
btrfs_set_stack_file_extent_ram_bytes(&fi, em->ram_bytes);
btrfs_set_stack_file_extent_compression(&fi, em->compress_type);
+ btrfs_set_stack_file_extent_encryption(&fi, encryption);

ret = log_extent_csums(trans, inode, log, em, ctx);
if (ret)
diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
index 08f561da33cd..af56a5eb3a00 100644
--- a/include/uapi/linux/btrfs_tree.h
+++ b/include/uapi/linux/btrfs_tree.h
@@ -1101,8 +1101,14 @@ struct btrfs_file_extent_item {
* but not for stat.
*/
__u8 compression;
+
+ /*
+ * Type of encryption in use. Unencrypted value is 0.
+ */
__u8 encryption;
- __le16 other_encoding; /* spare for later use */
+
+ /* spare for later use */
+ __le16 other_encoding;

/* are we inline data or a real extent? */
__u8 type;
--
2.41.0