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

[Josef Bacik <josef@toxicpanda.com>]

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