From patchwork Fri Jun 25 13:58:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 12345157 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F39EC49EC8 for ; Fri, 25 Jun 2021 13:58:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2096361981 for ; Fri, 25 Jun 2021 13:58:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231725AbhFYOBG (ORCPT ); Fri, 25 Jun 2021 10:01:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:33266 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231715AbhFYOBC (ORCPT ); Fri, 25 Jun 2021 10:01:02 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 79E6C61956; Fri, 25 Jun 2021 13:58:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624629522; bh=Nu6dQhTpuDbAdlaqDMA90J4FUNIW5CYnWFO6ImAJl3M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MMpBDOG3SjkT9gs9Unh8SQJK0E5ylWOOyrfMqtkWyGqDvb1SOHpgJeEKXJSM60gWe 4Fz8PZGZ+/FctWI5iRFdQbkdd4OJXANmVgeU6wWHlZqU/0eoEQNjXIZ8FIuKSN3ggm RUBtUqgCDqQ+dP1vLY4KQ0kfEc3l5wlHSK4W1UxdtIOxjzMrC3bX0ZFPoqLp8QVuf5 2nUo94qn59T6a/qDCwK2D4DlNswOg65U72T1j9wbc2c944e0FAlFs/dGX4DwO1hB5L pV3uUbugldNM7jNEUv9779UAKSrTU3atOWw3OZ6ooHMb5E6ijpUq4uQ4CeFOcR0JCx 5AJmRnQQeITiQ== From: Jeff Layton To: ceph-devel@vger.kernel.org Cc: lhenriques@suse.de, xiubli@redhat.com, linux-fsdevel@vger.kernel.org, linux-fscrypt@vger.kernel.org, dhowells@redhat.com Subject: [RFC PATCH v7 08/24] ceph: add ability to set fscrypt_auth via setattr Date: Fri, 25 Jun 2021 09:58:18 -0400 Message-Id: <20210625135834.12934-9-jlayton@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210625135834.12934-1-jlayton@kernel.org> References: <20210625135834.12934-1-jlayton@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org Signed-off-by: Jeff Layton --- fs/ceph/acl.c | 4 ++-- fs/ceph/inode.c | 30 ++++++++++++++++++++++++++++-- fs/ceph/mds_client.c | 31 ++++++++++++++++++++++++++----- fs/ceph/mds_client.h | 3 +++ fs/ceph/super.h | 7 ++++++- include/linux/ceph/ceph_fs.h | 21 +++++++++++++-------- 6 files changed, 78 insertions(+), 18 deletions(-) diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c index 529af59d9fd3..6e716f142022 100644 --- a/fs/ceph/acl.c +++ b/fs/ceph/acl.c @@ -136,7 +136,7 @@ int ceph_set_acl(struct user_namespace *mnt_userns, struct inode *inode, newattrs.ia_ctime = current_time(inode); newattrs.ia_mode = new_mode; newattrs.ia_valid = ATTR_MODE | ATTR_CTIME; - ret = __ceph_setattr(inode, &newattrs); + ret = __ceph_setattr(inode, &newattrs, NULL); if (ret) goto out_free; } @@ -147,7 +147,7 @@ int ceph_set_acl(struct user_namespace *mnt_userns, struct inode *inode, newattrs.ia_ctime = old_ctime; newattrs.ia_mode = old_mode; newattrs.ia_valid = ATTR_MODE | ATTR_CTIME; - __ceph_setattr(inode, &newattrs); + __ceph_setattr(inode, &newattrs, NULL); } goto out_free; } diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index b620281ea65b..7821ba04eef3 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -2086,7 +2086,7 @@ static const struct inode_operations ceph_symlink_iops = { .listxattr = ceph_listxattr, }; -int __ceph_setattr(struct inode *inode, struct iattr *attr) +int __ceph_setattr(struct inode *inode, struct iattr *attr, struct ceph_iattr *cia) { struct ceph_inode_info *ci = ceph_inode(inode); unsigned int ia_valid = attr->ia_valid; @@ -2127,6 +2127,32 @@ int __ceph_setattr(struct inode *inode, struct iattr *attr) dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); + if (cia && cia->fscrypt_auth) { + u32 len = offsetof(struct ceph_fscrypt_auth, cfa_blob) + + le32_to_cpu(cia->fscrypt_auth->cfa_blob_len); + + if (len > sizeof(*cia->fscrypt_auth)) + return -EINVAL; + + dout("setattr %llx:%llx fscrypt_auth len %u to %u)\n", + ceph_vinop(inode), ci->fscrypt_auth_len, len); + + /* It should never be re-set once set */ + WARN_ON_ONCE(ci->fscrypt_auth); + + if (issued & CEPH_CAP_AUTH_EXCL) { + dirtied |= CEPH_CAP_AUTH_EXCL; + kfree(ci->fscrypt_auth); + ci->fscrypt_auth = (u8 *)cia->fscrypt_auth; + ci->fscrypt_auth_len = len; + } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0) { + req->r_fscrypt_auth = cia->fscrypt_auth; + mask |= CEPH_SETATTR_FSCRYPT_AUTH; + release |= CEPH_CAP_AUTH_SHARED; + } + cia->fscrypt_auth = NULL; + } + if (ia_valid & ATTR_UID) { dout("setattr %p uid %d -> %d\n", inode, from_kuid(&init_user_ns, inode->i_uid), @@ -2324,7 +2350,7 @@ int ceph_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) return -EDQUOT; - err = __ceph_setattr(inode, attr); + err = __ceph_setattr(inode, attr, NULL); if (err >= 0 && (attr->ia_valid & ATTR_MODE)) err = posix_acl_chmod(&init_user_ns, inode, attr->ia_mode); diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 9c994effc51d..4aca8ce1c135 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -2529,8 +2529,7 @@ static int set_request_path_attr(struct inode *rinode, struct dentry *rdentry, return r; } -static void encode_timestamp_and_gids(void **p, - const struct ceph_mds_request *req) +static void encode_mclientrequest_tail(void **p, const struct ceph_mds_request *req) { struct ceph_timespec ts; int i; @@ -2543,6 +2542,21 @@ static void encode_timestamp_and_gids(void **p, for (i = 0; i < req->r_cred->group_info->ngroups; i++) ceph_encode_64(p, from_kgid(&init_user_ns, req->r_cred->group_info->gid[i])); + + /* v5: altname (TODO: skip for now) */ + ceph_encode_32(p, 0); + + /* v6: fscrypt_auth and fscrypt_file */ + if (req->r_fscrypt_auth) { + u32 authlen = le32_to_cpu(req->r_fscrypt_auth->cfa_blob_len); + + authlen += offsetof(struct ceph_fscrypt_auth, cfa_blob); + ceph_encode_32(p, authlen); + ceph_encode_copy(p, req->r_fscrypt_auth, authlen); + } else { + ceph_encode_32(p, 0); + } + ceph_encode_32(p, 0); // fscrypt_file for now } /* @@ -2591,6 +2605,13 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session, len += pathlen1 + pathlen2 + 2*(1 + sizeof(u32) + sizeof(u64)) + sizeof(struct ceph_timespec); len += sizeof(u32) + (sizeof(u64) * req->r_cred->group_info->ngroups); + len += sizeof(u32); // altname + len += sizeof(u32); // fscrypt_auth + if (req->r_fscrypt_auth) { + len += offsetof(struct ceph_fscrypt_auth, cfa_blob); + len += le32_to_cpu(req->r_fscrypt_auth->cfa_blob_len); + } + len += sizeof(u32); // fscrypt_file /* calculate (max) length for cap releases */ len += sizeof(struct ceph_mds_request_release) * @@ -2621,7 +2642,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session, } else { struct ceph_mds_request_head *new_head = msg->front.iov_base; - msg->hdr.version = cpu_to_le16(4); + msg->hdr.version = cpu_to_le16(6); new_head->version = cpu_to_le16(CEPH_MDS_REQUEST_HEAD_VERSION); head = (struct ceph_mds_request_head_old *)&new_head->oldest_client_tid; p = msg->front.iov_base + sizeof(*new_head); @@ -2672,7 +2693,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_session *session, head->num_releases = cpu_to_le16(releases); - encode_timestamp_and_gids(&p, req); + encode_mclientrequest_tail(&p, req); if (WARN_ON_ONCE(p > end)) { ceph_msg_put(msg); @@ -2781,7 +2802,7 @@ static int __prepare_send_request(struct ceph_mds_session *session, rhead->num_releases = 0; p = msg->front.iov_base + req->r_request_release_offset; - encode_timestamp_and_gids(&p, req); + encode_mclientrequest_tail(&p, req); msg->front.iov_len = p - msg->front.iov_base; msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index 0c3cc61fd038..800eed49c2fd 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -278,6 +278,9 @@ struct ceph_mds_request { struct mutex r_fill_mutex; union ceph_mds_request_args r_args; + + struct ceph_fscrypt_auth *r_fscrypt_auth; + int r_fmode; /* file mode, if expecting cap */ const struct cred *r_cred; int r_request_release_offset; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index e032737fe472..ad62cde30e0b 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1035,7 +1035,12 @@ static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) } extern int ceph_permission(struct user_namespace *mnt_userns, struct inode *inode, int mask); -extern int __ceph_setattr(struct inode *inode, struct iattr *attr); + +struct ceph_iattr { + struct ceph_fscrypt_auth *fscrypt_auth; +}; + +extern int __ceph_setattr(struct inode *inode, struct iattr *attr, struct ceph_iattr *cia); extern int ceph_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, struct iattr *attr); extern int ceph_getattr(struct user_namespace *mnt_userns, diff --git a/include/linux/ceph/ceph_fs.h b/include/linux/ceph/ceph_fs.h index e41a811026f6..a45a82c7d432 100644 --- a/include/linux/ceph/ceph_fs.h +++ b/include/linux/ceph/ceph_fs.h @@ -355,14 +355,19 @@ enum { extern const char *ceph_mds_op_name(int op); - -#define CEPH_SETATTR_MODE 1 -#define CEPH_SETATTR_UID 2 -#define CEPH_SETATTR_GID 4 -#define CEPH_SETATTR_MTIME 8 -#define CEPH_SETATTR_ATIME 16 -#define CEPH_SETATTR_SIZE 32 -#define CEPH_SETATTR_CTIME 64 +#define CEPH_SETATTR_MODE (1 << 0) +#define CEPH_SETATTR_UID (1 << 1) +#define CEPH_SETATTR_GID (1 << 2) +#define CEPH_SETATTR_MTIME (1 << 3) +#define CEPH_SETATTR_ATIME (1 << 4) +#define CEPH_SETATTR_SIZE (1 << 5) +#define CEPH_SETATTR_CTIME (1 << 6) +#define CEPH_SETATTR_MTIME_NOW (1 << 7) +#define CEPH_SETATTR_ATIME_NOW (1 << 8) +#define CEPH_SETATTR_BTIME (1 << 9) +#define CEPH_SETATTR_KILL_SGUID (1 << 10) +#define CEPH_SETATTR_FSCRYPT_AUTH (1 << 11) +#define CEPH_SETATTR_FSCRYPT_FILE (1 << 12) /* * Ceph setxattr request flags.