@@ -29,9 +29,15 @@ static bool ceph_crypt_empty_dir(struct inode *inode)
return ci->i_rsubdirs + ci->i_rfiles == 1;
}
+static const union fscrypt_policy *ceph_get_dummy_policy(struct super_block *sb)
+{
+ return ceph_sb_to_client(sb)->dummy_enc_policy.policy;
+}
+
static struct fscrypt_operations ceph_fscrypt_ops = {
.get_context = ceph_crypt_get_context,
.set_context = ceph_crypt_set_context,
+ .get_dummy_policy = ceph_get_dummy_policy,
.empty_dir = ceph_crypt_empty_dir,
.max_namelen = NAME_MAX,
};
@@ -13,12 +13,20 @@
#ifdef CONFIG_FS_ENCRYPTION
void ceph_fscrypt_set_ops(struct super_block *sb);
+static inline void ceph_fscrypt_free_dummy_policy(struct ceph_fs_client *fsc)
+{
+ fscrypt_free_dummy_policy(&fsc->dummy_enc_policy);
+}
+
#else /* CONFIG_FS_ENCRYPTION */
static inline void ceph_fscrypt_set_ops(struct super_block *sb)
{
}
+static inline void ceph_fscrypt_free_dummy_policy(struct ceph_fs_client *fsc)
+{
+}
#endif /* CONFIG_FS_ENCRYPTION */
#endif
@@ -45,6 +45,7 @@ static void ceph_put_super(struct super_block *s)
struct ceph_fs_client *fsc = ceph_sb_to_client(s);
dout("put_super\n");
+ ceph_fscrypt_free_dummy_policy(fsc);
ceph_mdsc_close_sessions(fsc->mdsc);
}
@@ -159,6 +160,7 @@ enum {
Opt_quotadf,
Opt_copyfrom,
Opt_wsync,
+ Opt_test_dummy_encryption,
};
enum ceph_recover_session_mode {
@@ -197,6 +199,8 @@ static const struct fs_parameter_spec ceph_mount_parameters[] = {
fsparam_u32 ("rsize", Opt_rsize),
fsparam_string ("snapdirname", Opt_snapdirname),
fsparam_string ("source", Opt_source),
+ fsparam_flag ("test_dummy_encryption", Opt_test_dummy_encryption),
+ fsparam_string ("test_dummy_encryption", Opt_test_dummy_encryption),
fsparam_u32 ("wsize", Opt_wsize),
fsparam_flag_no ("wsync", Opt_wsync),
{}
@@ -455,6 +459,16 @@ static int ceph_parse_mount_param(struct fs_context *fc,
else
fsopt->flags |= CEPH_MOUNT_OPT_ASYNC_DIROPS;
break;
+ case Opt_test_dummy_encryption:
+#ifdef CONFIG_FS_ENCRYPTION
+ kfree(fsopt->test_dummy_encryption);
+ fsopt->test_dummy_encryption = param->string;
+ param->string = NULL;
+ fsopt->flags |= CEPH_MOUNT_OPT_TEST_DUMMY_ENC;
+#else
+ warnfc(fc, "FS encryption not supported: test_dummy_encryption mount option ignored");
+#endif
+ break;
default:
BUG();
}
@@ -474,6 +488,7 @@ static void destroy_mount_options(struct ceph_mount_options *args)
kfree(args->mds_namespace);
kfree(args->server_path);
kfree(args->fscache_uniq);
+ kfree(args->test_dummy_encryption);
kfree(args);
}
@@ -581,6 +596,8 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
if (fsopt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS)
seq_puts(m, ",nowsync");
+ fscrypt_show_test_dummy_encryption(m, ',', root->d_sb);
+
if (fsopt->wsize != CEPH_MAX_WRITE_SIZE)
seq_printf(m, ",wsize=%u", fsopt->wsize);
if (fsopt->rsize != CEPH_MAX_READ_SIZE)
@@ -916,6 +933,52 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
return root;
}
+#ifdef CONFIG_FS_ENCRYPTION
+static int ceph_set_test_dummy_encryption(struct super_block *sb, struct fs_context *fc,
+ struct ceph_mount_options *fsopt)
+{
+ struct ceph_fs_client *fsc = sb->s_fs_info;
+
+ /*
+ * No changing encryption context on remount. Note that
+ * fscrypt_set_test_dummy_encryption will validate the version
+ * string passed in (if any).
+ */
+ if (fsopt->flags & CEPH_MOUNT_OPT_TEST_DUMMY_ENC) {
+ int err = 0;
+
+ if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE && !fsc->dummy_enc_policy.policy) {
+ errorfc(fc, "Can't set test_dummy_encryption on remount");
+ return -EEXIST;
+ }
+
+ err = fscrypt_set_test_dummy_encryption(sb,
+ fsc->mount_options->test_dummy_encryption,
+ &fsc->dummy_enc_policy);
+ if (err) {
+ if (err == -EEXIST)
+ errorfc(fc, "Can't change test_dummy_encryption on remount");
+ else if (err == -EINVAL)
+ errorfc(fc, "Value of option \"%s\" is unrecognized",
+ fsc->mount_options->test_dummy_encryption);
+ else
+ errorfc(fc, "Error processing option \"%s\" [%d]",
+ fsc->mount_options->test_dummy_encryption, err);
+ return err;
+ }
+ warnfc(fc, "test_dummy_encryption mode enabled");
+ }
+ return 0;
+}
+#else
+static inline int ceph_set_test_dummy_encryption(struct super_block *sb, struct fs_context *fc,
+ struct ceph_mount_options *fsopt)
+{
+ warnfc(fc, "test_dummy_encryption mode ignored");
+ return 0;
+}
+#endif
+
/*
* mount: join the ceph cluster, and open root directory.
*/
@@ -944,6 +1007,10 @@ static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc,
goto out;
}
+ err = ceph_set_test_dummy_encryption(fsc->sb, fc, fsc->mount_options);
+ if (err)
+ goto out;
+
dout("mount opening path '%s'\n", path);
ceph_fs_debugfs_init(fsc);
@@ -1138,16 +1205,22 @@ static void ceph_free_fc(struct fs_context *fc)
static int ceph_reconfigure_fc(struct fs_context *fc)
{
+ int err;
struct ceph_parse_opts_ctx *pctx = fc->fs_private;
struct ceph_mount_options *fsopt = pctx->opts;
- struct ceph_fs_client *fsc = ceph_sb_to_client(fc->root->d_sb);
+ struct super_block *sb = fc->root->d_sb;
+ struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
+
+ err = ceph_set_test_dummy_encryption(sb, fc, fsopt);
+ if (err)
+ return err;
if (fsopt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS)
ceph_set_mount_opt(fsc, ASYNC_DIROPS);
else
ceph_clear_mount_opt(fsc, ASYNC_DIROPS);
- sync_filesystem(fc->root->d_sb);
+ sync_filesystem(sb);
return 0;
}
@@ -17,6 +17,7 @@
#include <linux/posix_acl.h>
#include <linux/refcount.h>
#include <linux/security.h>
+#include <linux/fscrypt.h>
#include <linux/ceph/libceph.h>
@@ -44,6 +45,7 @@
#define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */
#define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */
#define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */
+#define CEPH_MOUNT_OPT_TEST_DUMMY_ENC (1<<16) /* enable dummy encryption (for testing) */
#define CEPH_MOUNT_OPT_DEFAULT \
(CEPH_MOUNT_OPT_DCACHE | \
@@ -96,6 +98,7 @@ struct ceph_mount_options {
char *mds_namespace; /* default NULL */
char *server_path; /* default NULL (means "/") */
char *fscache_uniq; /* default NULL */
+ char *test_dummy_encryption; /* default NULL */
};
struct ceph_fs_client {
@@ -135,9 +138,11 @@ struct ceph_fs_client {
#ifdef CONFIG_CEPH_FSCACHE
struct fscache_cookie *fscache;
#endif
+#ifdef CONFIG_FS_ENCRYPTION
+ struct fscrypt_dummy_policy dummy_enc_policy;
+#endif
};
-
/*
* File i/o capability. This tracks shared state with the metadata
* server that allows us to cache or writeback attributes or to read
Signed-off-by: Jeff Layton <jlayton@kernel.org> --- fs/ceph/crypto.c | 6 ++++ fs/ceph/crypto.h | 8 +++++ fs/ceph/super.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++-- fs/ceph/super.h | 7 ++++- 4 files changed, 95 insertions(+), 3 deletions(-)