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 <sat...@google.com>
---
 fs/proc_namespace.c | 1 +
 include/linux/fs.h  | 1 +
 2 files changed, 2 insertions(+)

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 d3ebb49189df2..da6551c8d96fb 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1376,6 +1376,7 @@ 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 */
-- 
2.26.2.645.ge9eca65c58-goog



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