[PATCH v4 24/46] btrfs: plumb the fscrypt extent context through create_io_em

Josef Bacik
2023-12-01T22:12:25Z

For prealloc extents we create an em, since we already have the context
loaded from the original prealloc extent creation we need to
pre-populate the extent map fscrypt info so it can be read properly
later if the pages are evicted. Add the argument for create_io_em and
set it to NULL until we're ready to populate it properly.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/inode.c | 36 ++++++++++++++++++++----------------
1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 83d653376deb..837d7a3969d1 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -140,11 +140,12 @@ static noinline int run_delalloc_cow(struct btrfs_inode *inode,
struct page *locked_page, u64 start,
u64 end, struct writeback_control *wbc,
bool pages_dirty);
-static struct extent_map *create_io_em(struct btrfs_inode *inode, u64 start,
- u64 len, u64 orig_start, u64 block_start,
- u64 block_len, u64 orig_block_len,
- u64 ram_bytes, int compress_type,
- int type);
+static struct extent_map *create_io_em(struct btrfs_inode *inode,
+ struct fscrypt_extent_info *fscrypt_info,
+ u64 start, u64 len, u64 orig_start,
+ u64 block_start, u64 block_len,
+ u64 orig_block_len, u64 ram_bytes,
+ int compress_type, int type);

static int data_reloc_print_warning_inode(u64 inum, u64 offset, u64 num_bytes,
u64 root, void *warn_ctx)
@@ -1156,7 +1157,7 @@ static void submit_one_async_extent(struct async_chunk *async_chunk,
}

/* Here we're doing allocation and writeback of the compressed pages */
- em = create_io_em(inode, start,
+ em = create_io_em(inode, NULL, start,
async_extent->ram_size, /* len */
start, /* orig_start */
ins.objectid, /* block_start */
@@ -1421,7 +1422,7 @@ static noinline int cow_file_range(struct btrfs_inode *inode,
extent_reserved = true;

ram_size = ins.offset;
- em = create_io_em(inode, start, ins.offset, /* len */
+ em = create_io_em(inode, NULL, start, ins.offset, /* len */
start, /* orig_start */
ins.objectid, /* block_start */
ins.offset, /* block_len */
@@ -2154,7 +2155,8 @@ static noinline int run_delalloc_nocow(struct btrfs_inode *inode,
u64 orig_start = found_key.offset - nocow_args.extent_offset;
struct extent_map *em;

- em = create_io_em(inode, cur_offset, nocow_args.num_bytes,
+ em = create_io_em(inode, NULL, cur_offset,
+ nocow_args.num_bytes,
orig_start,
nocow_args.disk_bytenr, /* block_start */
nocow_args.num_bytes, /* block_len */
@@ -7053,8 +7055,9 @@ static struct extent_map *btrfs_create_dio_extent(struct btrfs_inode *inode,
struct btrfs_ordered_extent *ordered;

if (type != BTRFS_ORDERED_NOCOW) {
- em = create_io_em(inode, start, len, orig_start, block_start,
- block_len, orig_block_len, ram_bytes,
+ em = create_io_em(inode, NULL, start, len, orig_start,
+ block_start, block_len, orig_block_len,
+ ram_bytes,
BTRFS_COMPRESS_NONE, /* compress_type */
type);
if (IS_ERR(em))
@@ -7342,11 +7345,12 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend,
}

/* The callers of this must take lock_extent() */
-static struct extent_map *create_io_em(struct btrfs_inode *inode, u64 start,
- u64 len, u64 orig_start, u64 block_start,
- u64 block_len, u64 orig_block_len,
- u64 ram_bytes, int compress_type,
- int type)
+static struct extent_map *create_io_em(struct btrfs_inode *inode,
+ struct fscrypt_extent_info *fscrypt_info,
+ u64 start, u64 len, u64 orig_start,
+ u64 block_start, u64 block_len,
+ u64 orig_block_len, u64 ram_bytes,
+ int compress_type, int type)
{
struct extent_map *em;
int ret;
@@ -10535,7 +10539,7 @@ ssize_t btrfs_do_encoded_write(struct kiocb *iocb, struct iov_iter *from,
goto out_delalloc_release;
extent_reserved = true;

- em = create_io_em(inode, start, num_bytes,
+ em = create_io_em(inode, NULL, start, num_bytes,
start - encoded->unencoded_offset, ins.objectid,
ins.offset, ins.offset, ram_bytes, compression,
BTRFS_ORDERED_COMPRESSED);
--
2.41.0