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Date: Wed, 13 Jul 2022 20:55:35 +0800
From: Xiubo Li <xiubli@...hat.com>
To: Jeff Layton <jlayton@...nel.org>, ceph-devel@...r.kernel.org,
idryomov@...il.com
Cc: vshankar@...hat.com, linux-kernel@...r.kernel.org,
Eric Biggers <ebiggers@...nel.org>
Subject: Re: [PATCH] ceph: fix up test_dummy_encryption handling for new mount
API
Hi Jeff,
I am rebasing the 'wip-fscrypt' branch to the 'testing', and there is
one commit conflicts:
commit 81faddddbef409bcaa1aa3d89e59606cde94dab7
Author: Jeff Layton <jlayton@...nel.org>
Date: Wed Dec 1 09:21:39 2021 -0500
ceph: add infrastructure for file encryption and decryption
...and allow test_dummy_encryption to bypass content encryption
if mounted with test_dummy_encryption=clear.
Reviewed-by: Xiubo Li <xiubli@...hat.com>
Signed-off-by: Jeff Layton <jlayton@...nel.org>
And the conflicts are:
[xiubli@...ora ]$ cat fs/ceph/super.h.rej
--- fs/ceph/super.h
+++ fs/ceph/super.h
@@ -45,6 +45,7 @@
#define CEPH_MOUNT_OPT_NOPAGECACHE (1<<16) /* bypass pagecache
altogether */
#define CEPH_MOUNT_OPT_SPARSEREAD (1<<17) /* always do sparse
reads */
#define CEPH_MOUNT_OPT_TEST_DUMMY_ENC (1<<18) /* enable dummy
encryption (for testing) */
+#define CEPH_MOUNT_OPT_DUMMY_ENC_CLEAR (1<<19) /* don't actually
encrypt content */
#define CEPH_MOUNT_OPT_DEFAULT \
(CEPH_MOUNT_OPT_DCACHE | \
[xiubli@...ora ]$ cat fs/ceph/super.c.rej
--- fs/ceph/super.c
+++ fs/ceph/super.c
@@ -1098,6 +1098,14 @@ static int ceph_set_test_dummy_encryption(struct
super_block *sb, struct fs_cont
return -EEXIST;
}
+ /* HACK: allow for cleartext "encryption" in files for testing */
+ if (fsc->mount_options->test_dummy_encryption &&
+ !strcmp(fsc->mount_options->test_dummy_encryption, "clear")) {
+ fsopt->flags |= CEPH_MOUNT_OPT_DUMMY_ENC_CLEAR;
+ kfree(fsc->mount_options->test_dummy_encryption);
+ fsc->mount_options->test_dummy_encryption = NULL;
+ }
+
err = fscrypt_set_test_dummy_encryption(sb,
fsc->mount_options->test_dummy_encryption,
&fsc->dummy_enc_policy);
And I have pushed the tmp patches to
https://github.com/lxbsz/ceph-client/commits/lxb-wip-fscrypt3.
Please take a look is that okay ?
Thanks
-- Xiubo
On 7/13/22 6:42 PM, Jeff Layton wrote:
> On Wed, 2022-07-13 at 16:56 +0800, xiubli@...hat.com wrote:
>> From: Xiubo Li <xiubli@...hat.com>
>>
>> From Eric the "fscrypt_set_test_dummy_encryption()" will be removed
>> in the next circle. Switch it to new APIs.
>>
>> Cc: Eric Biggers <ebiggers@...nel.org>
>> Cc: Jeff Layton <jlayton@...nel.org>
>> Signed-off-by: Xiubo Li <xiubli@...hat.com>
>> ---
>> fs/ceph/crypto.c | 4 +--
>> fs/ceph/super.c | 94 ++++++++++++++++++++++++------------------------
>> fs/ceph/super.h | 5 ++-
>> 3 files changed, 52 insertions(+), 51 deletions(-)
>>
>> diff --git a/fs/ceph/crypto.c b/fs/ceph/crypto.c
>> index 7e0c48e12554..5b807f8f4c69 100644
>> --- a/fs/ceph/crypto.c
>> +++ b/fs/ceph/crypto.c
>> @@ -127,7 +127,7 @@ static bool ceph_crypt_empty_dir(struct inode *inode)
>>
>> static const union fscrypt_policy *ceph_get_dummy_policy(struct super_block *sb)
>> {
>> - return ceph_sb_to_client(sb)->dummy_enc_policy.policy;
>> + return ceph_sb_to_client(sb)->fsc_dummy_enc_policy.policy;
>> }
>>
>> static struct fscrypt_operations ceph_fscrypt_ops = {
>> @@ -144,7 +144,7 @@ void ceph_fscrypt_set_ops(struct super_block *sb)
>>
>> void ceph_fscrypt_free_dummy_policy(struct ceph_fs_client *fsc)
>> {
>> - fscrypt_free_dummy_policy(&fsc->dummy_enc_policy);
>> + fscrypt_free_dummy_policy(&fsc->fsc_dummy_enc_policy);
>> }
>>
>> int ceph_fscrypt_prepare_context(struct inode *dir, struct inode *inode,
>> diff --git a/fs/ceph/super.c b/fs/ceph/super.c
>> index fa59a804b32c..4ac4a90755a2 100644
>> --- a/fs/ceph/super.c
>> +++ b/fs/ceph/super.c
>> @@ -591,10 +591,16 @@ static int ceph_parse_mount_param(struct fs_context *fc,
>> 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;
>> + fscrypt_free_dummy_policy(&fsopt->dummy_enc_policy);
>> + ret = fscrypt_parse_test_dummy_encryption(param,
>> + &fsopt->dummy_enc_policy);
>> + if (ret == -EINVAL) {
>> + warnfc(fc, "Value of option \"%s\" is unrecognized",
>> + param->key);
>> + } else if (ret == -EEXIST) {
>> + warnfc(fc, "Conflicting test_dummy_encryption options");
>> + ret = -EINVAL;
>> + }
>> #else
>> warnfc(fc,
>> "FS encryption not supported: test_dummy_encryption mount option ignored");
>> @@ -620,7 +626,7 @@ static void destroy_mount_options(struct ceph_mount_options *args)
>> kfree(args->server_path);
>> kfree(args->fscache_uniq);
>> kfree(args->mon_addr);
>> - kfree(args->test_dummy_encryption);
>> + fscrypt_free_dummy_policy(&args->dummy_enc_policy);
>> kfree(args);
>> }
>>
>> @@ -1080,51 +1086,47 @@ 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)
>> +static int ceph_apply_test_dummy_encryption(struct super_block *sb,
>> + struct fs_context *fc,
>> + struct ceph_mount_options *fsopt)
>> {
>> - /*
>> - * 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) {
>> - struct ceph_fs_client *fsc = sb->s_fs_info;
>> - int err = 0;
>> + struct ceph_fs_client *fsc = sb->s_fs_info;
>> + int err;
>>
>> - if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE && !fsc->dummy_enc_policy.policy) {
>> - errorfc(fc, "Can't set test_dummy_encryption on remount");
>> - return -EEXIST;
>> - }
>> + if (!fscrypt_is_dummy_policy_set(&fsopt->dummy_enc_policy))
>> + return 0;
>>
>> - 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");
>> + /* No changing encryption context on remount. */
>> + if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE &&
>> + !fscrypt_is_dummy_policy_set(&fsc->fsc_dummy_enc_policy)) {
>> + if (fscrypt_dummy_policies_equal(&fsopt->dummy_enc_policy,
>> + &fsc->fsc_dummy_enc_policy))
>> + return 0;
>> + errorfc(fc, "Can't set test_dummy_encryption on remount");
>> + return -EINVAL;
>> }
>> +
>> + /* Also make sure fsopt doesn't contain a conflicting value. */
>> + if (fscrypt_is_dummy_policy_set(&fsc->fsc_dummy_enc_policy)) {
>> + if (fscrypt_dummy_policies_equal(&fsopt->dummy_enc_policy,
>> + &fsc->fsc_dummy_enc_policy))
>> + return 0;
>> + errorfc(fc, "Conflicting test_dummy_encryption options");
>> + return -EINVAL;
>> + }
>> +
>> + fsc->fsc_dummy_enc_policy = fsopt->dummy_enc_policy;
>> + memset(&fsopt->dummy_enc_policy, 0, sizeof(fsopt->dummy_enc_policy));
>> +
>> + err = fscrypt_add_test_dummy_key(sb, &fsc->fsc_dummy_enc_policy);
>> + if (err) {
>> + errorfc(fc, "Error adding test dummy encryption key, %d", 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)
>> -{
>> - if (fsopt->flags & CEPH_MOUNT_OPT_TEST_DUMMY_ENC)
>> - warnfc(fc, "test_dummy_encryption mode ignored");
>> - return 0;
>> -}
>> -#endif
>>
>> /*
>> * mount: join the ceph cluster, and open root directory.
>> @@ -1154,7 +1156,7 @@ 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);
>> + err = ceph_apply_test_dummy_encryption(fsc->sb, fc, fsc->mount_options);
>> if (err)
>> goto out;
>>
>> @@ -1373,7 +1375,7 @@ static int ceph_reconfigure_fc(struct fs_context *fc)
>> 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);
>> + err = ceph_apply_test_dummy_encryption(sb, fc, fsopt);
>> if (err)
>> return err;
>>
>> diff --git a/fs/ceph/super.h b/fs/ceph/super.h
>> index bfc8bfcea799..5ea0ac6450dd 100644
>> --- a/fs/ceph/super.h
>> +++ b/fs/ceph/super.h
>> @@ -44,7 +44,6 @@
>> #define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */
>> #define CEPH_MOUNT_OPT_NOPAGECACHE (1<<16) /* bypass pagecache altogether */
>> #define CEPH_MOUNT_OPT_SPARSEREAD (1<<17) /* always do sparse reads */
>> -#define CEPH_MOUNT_OPT_TEST_DUMMY_ENC (1<<18) /* enable dummy encryption (for testing) */
>>
>> #define CEPH_MOUNT_OPT_DEFAULT \
>> (CEPH_MOUNT_OPT_DCACHE | \
>> @@ -101,7 +100,7 @@ struct ceph_mount_options {
>> char *server_path; /* default NULL (means "/") */
>> char *fscache_uniq; /* default NULL */
>> char *mon_addr;
>> - char *test_dummy_encryption; /* default NULL */
>> + struct fscrypt_dummy_policy dummy_enc_policy;
>> };
>>
>> #define CEPH_ASYNC_CREATE_CONFLICT_BITS 8
>> @@ -148,7 +147,7 @@ struct ceph_fs_client {
>> struct fscache_volume *fscache;
>> #endif
>> #ifdef CONFIG_FS_ENCRYPTION
>> - struct fscrypt_dummy_policy dummy_enc_policy;
>> + struct fscrypt_dummy_policy fsc_dummy_enc_policy;
>> #endif
>> };
>>
> LGTM
>
> Reviewed-by: Jeff Layton <jlayton@...nel.org>
>
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