From: Sweet Tea Dorminy Since extent encryption requires inline encryption, even though we expect to use the inlinecrypt software fallback most of the time, we need to enumerate all the devices in use by btrfs. Signed-off-by: Sweet Tea Dorminy Signed-off-by: Josef Bacik Signed-off-by: Daniel Vacek --- v5: https://lore.kernel.org/linux-btrfs/47ff044fae65cb2b06a6bb6ffc91027511c4d1f4.1706116485.git.josef@toxicpanda.com/ * No changes since. --- fs/btrfs/fscrypt.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/fs/btrfs/fscrypt.c b/fs/btrfs/fscrypt.c index 078b8c9a0334..608f8797ea6f 100644 --- a/fs/btrfs/fscrypt.c +++ b/fs/btrfs/fscrypt.c @@ -12,7 +12,9 @@ #include "ioctl.h" #include "messages.h" #include "root-tree.h" +#include "super.h" #include "transaction.h" +#include "volumes.h" #include "xattr.h" /* @@ -177,10 +179,44 @@ static bool btrfs_fscrypt_empty_dir(struct inode *inode) return inode->i_size == BTRFS_EMPTY_DIR_SIZE; } +static struct block_device **btrfs_fscrypt_get_devices(struct super_block *sb, + unsigned int *num_devs) +{ + struct btrfs_fs_info *fs_info = btrfs_sb(sb); + struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; + int nr_devices = fs_devices->open_devices; + struct block_device **devs; + struct btrfs_device *device; + int i = 0; + + devs = kmalloc_array(nr_devices, sizeof(*devs), GFP_NOFS | GFP_NOWAIT); + if (!devs) + return ERR_PTR(-ENOMEM); + + rcu_read_lock(); + list_for_each_entry_rcu(device, &fs_devices->devices, dev_list) { + if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state) || + !device->bdev || + test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) + continue; + + devs[i++] = device->bdev; + + if (i >= nr_devices) + break; + + } + rcu_read_unlock(); + + *num_devs = i; + return devs; +} + const struct fscrypt_operations btrfs_fscrypt_ops = { .inode_info_offs = (int)offsetof(struct btrfs_inode, i_crypt_info) - (int)offsetof(struct btrfs_inode, vfs_inode), .get_context = btrfs_fscrypt_get_context, .set_context = btrfs_fscrypt_set_context, .empty_dir = btrfs_fscrypt_empty_dir, + .get_devices = btrfs_fscrypt_get_devices, }; -- 2.51.0