diff mbox series

[v4,14/21] btrfs: translate btrfs encryption flags and encrypted inode flag

Message ID a7a27198299a215fe31b259bd90d1579ed175a1c.1666651724.git.sweettea-kernel@dorminy.me (mailing list archive)
State New, archived
Headers show
Series btrfs: add fscrypt integration | expand

Commit Message

Sweet Tea Dorminy Oct. 24, 2022, 11:13 p.m. UTC 
From: Omar Sandoval <osandov@osandov.com>

In btrfs, a file can be encrypted either if its directory is encrypted
or its root subvolume is encrypted, so translate both to the standard
flags.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/btrfs/ioctl.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index b28b7588f651..9cd59ab5a8a9 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -7,6 +7,7 @@ 
 #include <linux/bio.h>
 #include <linux/file.h>
 #include <linux/fs.h>
+#include <linux/fscrypt.h>
 #include <linux/fsnotify.h>
 #include <linux/pagemap.h>
 #include <linux/highmem.h>
@@ -149,6 +150,10 @@  static unsigned int btrfs_inode_flags_to_fsflags(struct btrfs_inode *binode)
 		iflags |= FS_NOCOW_FL;
 	if (ro_flags & BTRFS_INODE_RO_VERITY)
 		iflags |= FS_VERITY_FL;
+	if ((binode->flags & BTRFS_INODE_FSCRYPT_CONTEXT) ||
+	    (btrfs_root_flags(&binode->root->root_item) &
+	     BTRFS_ROOT_SUBVOL_FSCRYPT))
+		iflags |= FS_ENCRYPT_FL;
 
 	if (flags & BTRFS_INODE_NOCOMPRESS)
 		iflags |= FS_NOCOMP_FL;
@@ -178,10 +183,14 @@  void btrfs_sync_inode_flags_to_i_flags(struct inode *inode)
 		new_fl |= S_DIRSYNC;
 	if (binode->ro_flags & BTRFS_INODE_RO_VERITY)
 		new_fl |= S_VERITY;
+	if ((binode->flags & BTRFS_INODE_FSCRYPT_CONTEXT) ||
+	    (btrfs_root_flags(&binode->root->root_item) &
+	     BTRFS_ROOT_SUBVOL_FSCRYPT))
+		new_fl |= S_ENCRYPTED;
 
 	set_mask_bits(&inode->i_flags,
 		      S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME | S_DIRSYNC |
-		      S_VERITY, new_fl);
+		      S_VERITY | S_ENCRYPTED, new_fl);
 }
 
 /*
@@ -194,7 +203,7 @@  static int check_fsflags(unsigned int old_flags, unsigned int flags)
 		      FS_NOATIME_FL | FS_NODUMP_FL | \
 		      FS_SYNC_FL | FS_DIRSYNC_FL | \
 		      FS_NOCOMP_FL | FS_COMPR_FL |
-		      FS_NOCOW_FL))
+		      FS_NOCOW_FL | FS_ENCRYPT_FL))
 		return -EOPNOTSUPP;
 
 	/* COMPR and NOCOMP on new/old are valid */