[2/2] ubifs: add support for FS_ENCRYPT_FL

Commit Message

Eric Biggers Dec. 9, 2019, 10:23 p.m. UTC

From: Eric Biggers <[e-mail]>

Make the FS_IOC_GETFLAGS ioctl on ubifs return the FS_ENCRYPT_FL flag on
encrypted files, like ext4 and f2fs do.

Also make this flag be ignored by FS_IOC_SETFLAGS, like ext4 and f2fs
do, since it's a recognized flag but is not directly settable.

Signed-off-by: Eric Biggers <[e-mail]>
---
 fs/ubifs/ioctl.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

Patch

diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
index eeb1be2598881..d49fc04f2d7d4 100644
--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -17,10 +17,14 @@ 
 #include "ubifs.h"
 
 /* Need to be kept consistent with checked flags in ioctl2ubifs() */
-#define UBIFS_SUPPORTED_IOCTL_FLAGS \
+#define UBIFS_SETTABLE_IOCTL_FLAGS \
 	(FS_COMPR_FL | FS_SYNC_FL | FS_APPEND_FL | \
 	 FS_IMMUTABLE_FL | FS_DIRSYNC_FL)
 
+/* Need to be kept consistent with checked flags in ubifs2ioctl() */
+#define UBIFS_GETTABLE_IOCTL_FLAGS \
+	(UBIFS_SETTABLE_IOCTL_FLAGS | FS_ENCRYPT_FL)
+
 /**
  * ubifs_set_inode_flags - set VFS inode flags.
  * @inode: VFS inode to set flags for
@@ -91,6 +95,8 @@  static int ubifs2ioctl(int ubifs_flags)
 		ioctl_flags |= FS_IMMUTABLE_FL;
 	if (ubifs_flags & UBIFS_DIRSYNC_FL)
 		ioctl_flags |= FS_DIRSYNC_FL;
+	if (ubifs_flags & UBIFS_CRYPT_FL)
+		ioctl_flags |= FS_ENCRYPT_FL;
 
 	return ioctl_flags;
 }
@@ -113,7 +119,7 @@  static int setflags(struct inode *inode, int flags)
 	if (err)
 		goto out_unlock;
 
-	ui->flags &= ~ioctl2ubifs(UBIFS_SUPPORTED_IOCTL_FLAGS);
+	ui->flags &= ~ioctl2ubifs(UBIFS_SETTABLE_IOCTL_FLAGS);
 	ui->flags |= ioctl2ubifs(flags);
 	ubifs_set_inode_flags(inode);
 	inode->i_ctime = current_time(inode);
@@ -156,8 +162,9 @@  long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		if (get_user(flags, (int __user *) arg))
 			return -EFAULT;
 
-		if (flags & ~UBIFS_SUPPORTED_IOCTL_FLAGS)
+		if (flags & ~UBIFS_GETTABLE_IOCTL_FLAGS)
 			return -EOPNOTSUPP;
+		flags &= UBIFS_SETTABLE_IOCTL_FLAGS;
 
 		if (!S_ISDIR(inode->i_mode))
 			flags &= ~FS_DIRSYNC_FL;