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[v4,1/4] fs: introduce SB_INLINECRYPT

Message ID 20200702015607.1215430-2-satyat@google.com
State Not Applicable
Headers show
Series Inline Encryption Support for fscrypt | expand

Commit Message

Satya Tangirala July 2, 2020, 1:56 a.m. UTC 
Introduce SB_INLINECRYPT, which is set by filesystems that wish to use
blk-crypto for file content en/decryption. This flag maps to the
'-o inlinecrypt' mount option which multiple filesystems will implement,
and code in fs/crypto/ needs to be able to check for this mount option
in a filesystem-independent way.

Signed-off-by: Satya Tangirala <satyat@google.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
---
 include/linux/fs.h | 1 +
 1 file changed, 1 insertion(+)

Comments

Theodore Ts'o July 8, 2020, 5:07 p.m. UTC | #1 
On Thu, Jul 02, 2020 at 01:56:04AM +0000, Satya Tangirala wrote:
> Introduce SB_INLINECRYPT, which is set by filesystems that wish to use
> blk-crypto for file content en/decryption. This flag maps to the
> '-o inlinecrypt' mount option which multiple filesystems will implement,
> and code in fs/crypto/ needs to be able to check for this mount option
> in a filesystem-independent way.
> 
> Signed-off-by: Satya Tangirala <satyat@google.com>
> Reviewed-by: Eric Biggers <ebiggers@google.com>

Reviewed-by: Theodore Ts'o <tytso@mit.edu>
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Patch

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3f881a892ea7..b5e07fcdd11d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1380,6 +1380,7 @@  extern int send_sigurg(struct fown_struct *fown);
 #define SB_NODIRATIME	2048	/* Do not update directory access times */
 #define SB_SILENT	32768
 #define SB_POSIXACL	(1<<16)	/* VFS does not apply the umask */
+#define SB_INLINECRYPT	(1<<17)	/* Use blk-crypto for encrypted files */
 #define SB_KERNMOUNT	(1<<22) /* this is a kern_mount call */
 #define SB_I_VERSION	(1<<23) /* Update inode I_version field */
 #define SB_LAZYTIME	(1<<25) /* Update the on-disk [acm]times lazily */