[PATCH v4 26/46] btrfs: keep track of fscrypt info and orig_start for dio reads

Josef Bacik
2023-12-01T22:12:28Z

We keep track of this information in the ordered extent for writes, but
we need it for reads as well. Add fscrypt_extent_info and orig_start to
the dio_data so we can populate this on reads. This will be used later
when we attach the fscrypt context to the bios.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/inode.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 9c704b1cfe05..dbdc01f25215 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -83,6 +83,8 @@ struct btrfs_dio_data {
ssize_t submitted;
struct extent_changeset *data_reserved;
struct btrfs_ordered_extent *ordered;
+ struct fscrypt_extent_info *fscrypt_info;
+ u64 orig_start;
bool data_space_reserved;
bool nocow_done;
};
@@ -7767,6 +7769,10 @@ static int btrfs_dio_iomap_begin(struct inode *inode, loff_t start,
release_len);
}
} else {
+ dio_data->fscrypt_info =
+ fscrypt_get_extent_info(em->fscrypt_info);
+ dio_data->orig_start = em->orig_start;
+
/*
* We need to unlock only the end area that we aren't using.
* The rest is going to be unlocked by the endio routine.
@@ -7848,6 +7854,11 @@ static int btrfs_dio_iomap_end(struct inode *inode, loff_t pos, loff_t length,
dio_data->ordered = NULL;
}

+ if (dio_data->fscrypt_info) {
+ fscrypt_put_extent_info(dio_data->fscrypt_info);
+ dio_data->fscrypt_info = NULL;
+ }
+
if (write)
extent_changeset_free(dio_data->data_reserved);
return ret;
--
2.41.0