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[v9,08/11] fs: introduce SB_INLINECRYPT

Message ID 20200326030702.223233-9-satyat@google.com (mailing list archive)
State New, archived
Headers show
Series Inline Encryption Support | expand

Commit Message

Satya Tangirala March 26, 2020, 3:06 a.m. UTC
Introduce SB_INLINECRYPT, which is set by filesystems that wish to use
blk-crypto for file content en/decryption.

Signed-off-by: Satya Tangirala <satyat@google.com>
---
 fs/proc_namespace.c | 1 +
 include/linux/fs.h  | 1 +
 2 files changed, 2 insertions(+)

Comments

Eric Biggers March 26, 2020, 5:56 a.m. UTC | #1
On Wed, Mar 25, 2020 at 08:06:59PM -0700, Satya Tangirala wrote:
> Introduce SB_INLINECRYPT, which is set by filesystems that wish to use
> blk-crypto for file content en/decryption.
> 
> Signed-off-by: Satya Tangirala <satyat@google.com>

This commit message could use a better explanation.  E.g. 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.

- Eric
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Patch

diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
index 273ee82d8aa97..8bf195d3bda69 100644
--- a/fs/proc_namespace.c
+++ b/fs/proc_namespace.c
@@ -49,6 +49,7 @@  static int show_sb_opts(struct seq_file *m, struct super_block *sb)
 		{ SB_DIRSYNC, ",dirsync" },
 		{ SB_MANDLOCK, ",mand" },
 		{ SB_LAZYTIME, ",lazytime" },
+		{ SB_INLINECRYPT, ",inlinecrypt" },
 		{ 0, NULL }
 	};
 	const struct proc_fs_info *fs_infop;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index abedbffe2c9e4..5c758a765923d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1371,6 +1371,7 @@  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 */