From: Jeff Layton <jlayton@kernel.org>
Date: Mon, 27 Jul 2020 10:16:09 -0400
Subject: ceph: fscrypt_auth handling for ceph
Mime-version: 1.0
Content-type: text/plain; charset=UTF-8
Content-transfer-encoding: 8bit
Git-commit: 2d332d5bc424404911540006a8bb450fbb96b178
Patch-mainline: v6.6-rc1
References: jsc#SES-1880
Most fscrypt-enabled filesystems store the crypto context in an xattr,
but that's problematic for ceph as xatts are governed by the XATTR cap,
but we really want the crypto context as part of the AUTH cap.
Because of this, the MDS has added two new inode metadata fields:
fscrypt_auth and fscrypt_file. The former is used to hold the crypto
context, and the latter is used to track the real file size.
Parse new fscrypt_auth and fscrypt_file fields in inode traces. For now,
we don't use fscrypt_file, but fscrypt_auth is used to hold the fscrypt
context.
Allow the client to use a setattr request for setting the fscrypt_auth
field. Since this is not a standard setattr request from the VFS, we add
a new field to __ceph_setattr that carries ceph-specific inode attrs.
Have the set_context op do a setattr that sets the fscrypt_auth value,
and get_context just return the contents of that field (since it should
always be available).
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-and-tested-by: Luís Henriques <lhenriques@suse.de>
Reviewed-by: Milind Changire <mchangir@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Acked-by: Luis Henriques <lhenriques@suse.de>
---
fs/ceph/Makefile | 1
fs/ceph/acl.c | 4 -
fs/ceph/caps.c | 78 ++++++++++++++++++++++++-----
fs/ceph/crypto.c | 77 +++++++++++++++++++++++++++++
fs/ceph/crypto.h | 36 +++++++++++++
fs/ceph/inode.c | 64 +++++++++++++++++++++++-
fs/ceph/mds_client.c | 114 +++++++++++++++++++++++++++++++++++++++----
fs/ceph/mds_client.h | 7 ++
fs/ceph/super.c | 3 +
fs/ceph/super.h | 15 +++++
include/linux/ceph/ceph_fs.h | 21 ++++---
11 files changed, 385 insertions(+), 35 deletions(-)
--- a/fs/ceph/Makefile
+++ b/fs/ceph/Makefile
@@ -12,3 +12,4 @@ ceph-y := super.o inode.o dir.o file.o l
ceph-$(CONFIG_CEPH_FSCACHE) += cache.o
ceph-$(CONFIG_CEPH_FS_POSIX_ACL) += acl.o
+ceph-$(CONFIG_FS_ENCRYPTION) += crypto.o
--- a/fs/ceph/acl.c
+++ b/fs/ceph/acl.c
@@ -136,7 +136,7 @@ int ceph_set_acl(struct user_namespace *
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 *
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;
}
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -13,6 +13,7 @@
#include "super.h"
#include "mds_client.h"
#include "cache.h"
+#include "crypto.h"
#include <linux/ceph/decode.h>
#include <linux/ceph/messenger.h>
@@ -1215,15 +1216,12 @@ struct cap_msg_args {
umode_t mode;
bool inline_data;
bool wake;
+ u32 fscrypt_auth_len;
+ u32 fscrypt_file_len;
+ u8 fscrypt_auth[sizeof(struct ceph_fscrypt_auth)]; // for context
+ u8 fscrypt_file[sizeof(u64)]; // for size
};
-/*
- * cap struct size + flock buffer size + inline version + inline data size +
- * osd_epoch_barrier + oldest_flush_tid
- */
-#define CAP_MSG_SIZE (sizeof(struct ceph_mds_caps) + \
- 4 + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 8 + 8 + 4)
-
/* Marshal up the cap msg to the MDS */
static void encode_cap_msg(struct ceph_msg *msg, struct cap_msg_args *arg)
{
@@ -1239,7 +1237,7 @@ static void encode_cap_msg(struct ceph_m
arg->size, arg->max_size, arg->xattr_version,
arg->xattr_buf ? (int)arg->xattr_buf->vec.iov_len : 0);
- msg->hdr.version = cpu_to_le16(10);
+ msg->hdr.version = cpu_to_le16(12);
msg->hdr.tid = cpu_to_le64(arg->flush_tid);
fc = msg->front.iov_base;
@@ -1310,6 +1308,21 @@ static void encode_cap_msg(struct ceph_m
/* Advisory flags (version 10) */
ceph_encode_32(&p, arg->flags);
+
+ /* dirstats (version 11) - these are r/o on the client */
+ ceph_encode_64(&p, 0);
+ ceph_encode_64(&p, 0);
+
+#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
+ /* fscrypt_auth and fscrypt_file (version 12) */
+ ceph_encode_32(&p, arg->fscrypt_auth_len);
+ ceph_encode_copy(&p, arg->fscrypt_auth, arg->fscrypt_auth_len);
+ ceph_encode_32(&p, arg->fscrypt_file_len);
+ ceph_encode_copy(&p, arg->fscrypt_file, arg->fscrypt_file_len);
+#else /* CONFIG_FS_ENCRYPTION */
+ ceph_encode_32(&p, 0);
+ ceph_encode_32(&p, 0);
+#endif /* CONFIG_FS_ENCRYPTION */
}
/*
@@ -1431,8 +1444,38 @@ static void __prep_cap(struct cap_msg_ar
}
}
arg->flags = flags;
+#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
+ if (ci->fscrypt_auth_len &&
+ WARN_ON_ONCE(ci->fscrypt_auth_len > sizeof(struct ceph_fscrypt_auth))) {
+ /* Don't set this if it's too big */
+ arg->fscrypt_auth_len = 0;
+ } else {
+ arg->fscrypt_auth_len = ci->fscrypt_auth_len;
+ memcpy(arg->fscrypt_auth, ci->fscrypt_auth,
+ min_t(size_t, ci->fscrypt_auth_len,
+ sizeof(arg->fscrypt_auth)));
+ }
+ /* FIXME: use this to track "real" size */
+ arg->fscrypt_file_len = 0;
+#endif /* CONFIG_FS_ENCRYPTION */
}
+#define CAP_MSG_FIXED_FIELDS (sizeof(struct ceph_mds_caps) + \
+ 4 + 8 + 4 + 4 + 8 + 4 + 4 + 4 + 8 + 8 + 4 + 8 + 8 + 4 + 4)
+
+#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
+static inline int cap_msg_size(struct cap_msg_args *arg)
+{
+ return CAP_MSG_FIXED_FIELDS + arg->fscrypt_auth_len +
+ arg->fscrypt_file_len;
+}
+#else
+static inline int cap_msg_size(struct cap_msg_args *arg)
+{
+ return CAP_MSG_FIXED_FIELDS;
+}
+#endif /* CONFIG_FS_ENCRYPTION */
+
/*
* Send a cap msg on the given inode.
*
@@ -1443,7 +1486,8 @@ static void __send_cap(struct cap_msg_ar
struct ceph_msg *msg;
struct inode *inode = &ci->vfs_inode;
- msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, CAP_MSG_SIZE, GFP_NOFS, false);
+ msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, cap_msg_size(arg), GFP_NOFS,
+ false);
if (!msg) {
pr_err("error allocating cap msg: ino (%llx.%llx) flushing %s tid %llu, requeuing cap.\n",
ceph_vinop(inode), ceph_cap_string(arg->dirty),
@@ -1469,10 +1513,6 @@ static inline int __send_flush_snap(stru
struct cap_msg_args arg;
struct ceph_msg *msg;
- msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, CAP_MSG_SIZE, GFP_NOFS, false);
- if (!msg)
- return -ENOMEM;
-
arg.session = session;
arg.ino = ceph_vino(inode).ino;
arg.cid = 0;
@@ -1510,6 +1550,18 @@ static inline int __send_flush_snap(stru
arg.flags = 0;
arg.wake = false;
+ /*
+ * No fscrypt_auth changes from a capsnap. It will need
+ * to update fscrypt_file on size changes (TODO).
+ */
+ arg.fscrypt_auth_len = 0;
+ arg.fscrypt_file_len = 0;
+
+ msg = ceph_msg_new(CEPH_MSG_CLIENT_CAPS, cap_msg_size(&arg),
+ GFP_NOFS, false);
+ if (!msg)
+ return -ENOMEM;
+
encode_cap_msg(msg, &arg);
ceph_con_send(&arg.session->s_con, msg);
return 0;
--- /dev/null
+++ b/fs/ceph/crypto.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/ceph/ceph_debug.h>
+#include <linux/xattr.h>
+#include <linux/fscrypt.h>
+
+#include "super.h"
+#include "crypto.h"
+
+static int ceph_crypt_get_context(struct inode *inode, void *ctx, size_t len)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ struct ceph_fscrypt_auth *cfa = (struct ceph_fscrypt_auth *)ci->fscrypt_auth;
+ u32 ctxlen;
+
+ /* Non existent or too short? */
+ if (!cfa || (ci->fscrypt_auth_len < (offsetof(struct ceph_fscrypt_auth, cfa_blob) + 1)))
+ return -ENOBUFS;
+
+ /* Some format we don't recognize? */
+ if (le32_to_cpu(cfa->cfa_version) != CEPH_FSCRYPT_AUTH_VERSION)
+ return -ENOBUFS;
+
+ ctxlen = le32_to_cpu(cfa->cfa_blob_len);
+ if (len < ctxlen)
+ return -ERANGE;
+
+ memcpy(ctx, cfa->cfa_blob, ctxlen);
+ return ctxlen;
+}
+
+static int ceph_crypt_set_context(struct inode *inode, const void *ctx,
+ size_t len, void *fs_data)
+{
+ int ret;
+ struct iattr attr = { };
+ struct ceph_iattr cia = { };
+ struct ceph_fscrypt_auth *cfa;
+
+ WARN_ON_ONCE(fs_data);
+
+ if (len > FSCRYPT_SET_CONTEXT_MAX_SIZE)
+ return -EINVAL;
+
+ cfa = kzalloc(sizeof(*cfa), GFP_KERNEL);
+ if (!cfa)
+ return -ENOMEM;
+
+ cfa->cfa_version = cpu_to_le32(CEPH_FSCRYPT_AUTH_VERSION);
+ cfa->cfa_blob_len = cpu_to_le32(len);
+ memcpy(cfa->cfa_blob, ctx, len);
+
+ cia.fscrypt_auth = cfa;
+
+ ret = __ceph_setattr(inode, &attr, &cia);
+ if (ret == 0)
+ inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED);
+ kfree(cia.fscrypt_auth);
+ return ret;
+}
+
+static bool ceph_crypt_empty_dir(struct inode *inode)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+
+ return ci->i_rsubdirs + ci->i_rfiles == 1;
+}
+
+static struct fscrypt_operations ceph_fscrypt_ops = {
+ .get_context = ceph_crypt_get_context,
+ .set_context = ceph_crypt_set_context,
+ .empty_dir = ceph_crypt_empty_dir,
+};
+
+void ceph_fscrypt_set_ops(struct super_block *sb)
+{
+ fscrypt_set_ops(sb, &ceph_fscrypt_ops);
+}
--- /dev/null
+++ b/fs/ceph/crypto.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Ceph fscrypt functionality
+ */
+
+#ifndef _CEPH_CRYPTO_H
+#define _CEPH_CRYPTO_H
+
+#include <linux/fscrypt.h>
+
+struct ceph_fscrypt_auth {
+ __le32 cfa_version;
+ __le32 cfa_blob_len;
+ u8 cfa_blob[FSCRYPT_SET_CONTEXT_MAX_SIZE];
+} __packed;
+
+#define CEPH_FSCRYPT_AUTH_VERSION 1
+static inline u32 ceph_fscrypt_auth_len(struct ceph_fscrypt_auth *fa)
+{
+ u32 ctxsize = le32_to_cpu(fa->cfa_blob_len);
+
+ return offsetof(struct ceph_fscrypt_auth, cfa_blob) + ctxsize;
+}
+
+#ifdef CONFIG_FS_ENCRYPTION
+void ceph_fscrypt_set_ops(struct super_block *sb);
+
+#else /* CONFIG_FS_ENCRYPTION */
+
+static inline void ceph_fscrypt_set_ops(struct super_block *sb)
+{
+}
+
+#endif /* CONFIG_FS_ENCRYPTION */
+
+#endif
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -14,10 +14,12 @@
#include <linux/random.h>
#include <linux/sort.h>
#include <linux/iversion.h>
+#include <linux/fscrypt.h>
#include "super.h"
#include "mds_client.h"
#include "cache.h"
+#include "crypto.h"
#include <linux/ceph/decode.h>
/*
@@ -617,6 +619,10 @@ struct inode *ceph_alloc_inode(struct su
INIT_WORK(&ci->i_work, ceph_inode_work);
ci->i_work_mask = 0;
memset(&ci->i_btime, '\0', sizeof(ci->i_btime));
+#ifdef CONFIG_FS_ENCRYPTION
+ ci->fscrypt_auth = NULL;
+ ci->fscrypt_auth_len = 0;
+#endif
return &ci->vfs_inode;
}
@@ -625,6 +631,9 @@ void ceph_free_inode(struct inode *inode
struct ceph_inode_info *ci = ceph_inode(inode);
kfree(ci->i_symlink);
+#ifdef CONFIG_FS_ENCRYPTION
+ kfree(ci->fscrypt_auth);
+#endif
kmem_cache_free(ceph_inode_cachep, ci);
}
@@ -645,6 +654,7 @@ void ceph_evict_inode(struct inode *inod
clear_inode(inode);
ceph_fscache_unregister_inode_cookie(ci);
+ fscrypt_put_encryption_info(inode);
__ceph_remove_caps(ci);
@@ -935,6 +945,17 @@ int ceph_fill_inode(struct inode *inode,
__ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files);
+#ifdef CONFIG_FS_ENCRYPTION
+ if (iinfo->fscrypt_auth_len && (inode->i_state & I_NEW)) {
+ kfree(ci->fscrypt_auth);
+ ci->fscrypt_auth_len = iinfo->fscrypt_auth_len;
+ ci->fscrypt_auth = iinfo->fscrypt_auth;
+ iinfo->fscrypt_auth = NULL;
+ iinfo->fscrypt_auth_len = 0;
+ inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED);
+ }
+#endif
+
if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
(issued & CEPH_CAP_AUTH_EXCL) == 0) {
inode->i_mode = mode;
@@ -2079,7 +2100,8 @@ static const struct inode_operations cep
.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;
@@ -2119,6 +2141,43 @@ int __ceph_setattr(struct inode *inode,
}
dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
+#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
+ if (cia && cia->fscrypt_auth) {
+ u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth);
+
+ if (len > sizeof(*cia->fscrypt_auth)) {
+ err = -EINVAL;
+ spin_unlock(&ci->i_ceph_lock);
+ goto out;
+ }
+
+ 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 ||
+ ci->fscrypt_auth_len != len ||
+ memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) {
+ req->r_fscrypt_auth = cia->fscrypt_auth;
+ mask |= CEPH_SETATTR_FSCRYPT_AUTH;
+ release |= CEPH_CAP_AUTH_SHARED;
+ }
+ cia->fscrypt_auth = NULL;
+ }
+#else
+ if (cia && cia->fscrypt_auth) {
+ err = -EINVAL;
+ spin_unlock(&ci->i_ceph_lock);
+ goto out;
+ }
+#endif /* CONFIG_FS_ENCRYPTION */
if (ia_valid & ATTR_UID) {
dout("setattr %p uid %d -> %d\n", inode,
@@ -2282,6 +2341,7 @@ int __ceph_setattr(struct inode *inode,
req->r_stamp = attr->ia_ctime;
err = ceph_mdsc_do_request(mdsc, NULL, req);
}
+out:
dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
ceph_cap_string(dirtied), mask);
@@ -2322,7 +2382,7 @@ int ceph_setattr(struct user_namespace *
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);
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -15,6 +15,7 @@
#include "super.h"
#include "mds_client.h"
+#include "crypto.h"
#include <linux/ceph/ceph_features.h>
#include <linux/ceph/messenger.h>
@@ -184,8 +185,54 @@ static int parse_reply_info_in(void **p,
info->rsnaps = 0;
}
+ if (struct_v >= 5) {
+ u32 alen;
+
+ ceph_decode_32_safe(p, end, alen, bad);
+
+ while (alen--) {
+ u32 len;
+
+ /* key */
+ ceph_decode_32_safe(p, end, len, bad);
+ ceph_decode_skip_n(p, end, len, bad);
+ /* value */
+ ceph_decode_32_safe(p, end, len, bad);
+ ceph_decode_skip_n(p, end, len, bad);
+ }
+ }
+
+ /* fscrypt flag -- ignore */
+ if (struct_v >= 6)
+ ceph_decode_skip_8(p, end, bad);
+
+ info->fscrypt_auth = NULL;
+ info->fscrypt_auth_len = 0;
+ info->fscrypt_file = NULL;
+ info->fscrypt_file_len = 0;
+ if (struct_v >= 7) {
+ ceph_decode_32_safe(p, end, info->fscrypt_auth_len, bad);
+ if (info->fscrypt_auth_len) {
+ info->fscrypt_auth = kmalloc(info->fscrypt_auth_len,
+ GFP_KERNEL);
+ if (!info->fscrypt_auth)
+ return -ENOMEM;
+ ceph_decode_copy_safe(p, end, info->fscrypt_auth,
+ info->fscrypt_auth_len, bad);
+ }
+ ceph_decode_32_safe(p, end, info->fscrypt_file_len, bad);
+ if (info->fscrypt_file_len) {
+ info->fscrypt_file = kmalloc(info->fscrypt_file_len,
+ GFP_KERNEL);
+ if (!info->fscrypt_file)
+ return -ENOMEM;
+ ceph_decode_copy_safe(p, end, info->fscrypt_file,
+ info->fscrypt_file_len, bad);
+ }
+ }
*p = end;
} else {
+ /* legacy (unversioned) struct */
if (features & CEPH_FEATURE_MDS_INLINE_DATA) {
ceph_decode_64_safe(p, end, info->inline_version, bad);
ceph_decode_32_safe(p, end, info->inline_len, bad);
@@ -650,8 +697,21 @@ out_bad:
static void destroy_reply_info(struct ceph_mds_reply_info_parsed *info)
{
+ int i;
+
+ kfree(info->diri.fscrypt_auth);
+ kfree(info->diri.fscrypt_file);
+ kfree(info->targeti.fscrypt_auth);
+ kfree(info->targeti.fscrypt_file);
if (!info->dir_entries)
return;
+
+ for (i = 0; i < info->dir_nr; i++) {
+ struct ceph_mds_reply_dir_entry *rde = info->dir_entries + i;
+
+ kfree(rde->inode.fscrypt_auth);
+ kfree(rde->inode.fscrypt_file);
+ }
free_pages((unsigned long)info->dir_entries, get_order(info->dir_buf_size));
}
@@ -965,6 +1025,7 @@ void ceph_mdsc_release_request(struct kr
put_cred(req->r_cred);
if (req->r_pagelist)
ceph_pagelist_release(req->r_pagelist);
+ kfree(req->r_fscrypt_auth);
put_request_session(req);
ceph_unreserve_caps(req->r_mdsc, &req->r_caps_reservation);
WARN_ON_ONCE(!list_empty(&req->r_wait));
@@ -2527,8 +2588,8 @@ static int set_request_path_attr(struct
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;
@@ -2541,6 +2602,20 @@ static void encode_timestamp_and_gids(vo
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 = ceph_fscrypt_auth_len(req->r_fscrypt_auth);
+
+ 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
}
/*
@@ -2585,12 +2660,14 @@ static struct ceph_msg *create_request_m
goto out_free1;
}
+ /* head */
len = legacy ? sizeof(*head) : sizeof(struct ceph_mds_request_head);
- len += pathlen1 + pathlen2 + 2*(1 + sizeof(u32) + sizeof(u64)) +
- sizeof(struct ceph_timespec);
- len += sizeof(u32) + (sizeof(u64) * req->r_cred->group_info->ngroups);
- /* calculate (max) length for cap releases */
+ /* filepaths */
+ len += 2 * (1 + sizeof(u32) + sizeof(u64));
+ len += pathlen1 + pathlen2;
+
+ /* cap releases */
len += sizeof(struct ceph_mds_request_release) *
(!!req->r_inode_drop + !!req->r_dentry_drop +
!!req->r_old_inode_drop + !!req->r_old_dentry_drop);
@@ -2600,6 +2677,25 @@ static struct ceph_msg *create_request_m
if (req->r_old_dentry_drop)
len += pathlen2;
+ /* MClientRequest tail */
+
+ /* req->r_stamp */
+ len += sizeof(struct ceph_timespec);
+
+ /* gid list */
+ len += sizeof(u32) + (sizeof(u64) * req->r_cred->group_info->ngroups);
+
+ /* alternate name */
+ len += sizeof(u32); // TODO
+
+ /* fscrypt_auth */
+ len += sizeof(u32); // fscrypt_auth
+ if (req->r_fscrypt_auth)
+ len += ceph_fscrypt_auth_len(req->r_fscrypt_auth);
+
+ /* fscrypt_file */
+ len += sizeof(u32);
+
msg = ceph_msg_new2(CEPH_MSG_CLIENT_REQUEST, len, 1, GFP_NOFS, false);
if (!msg) {
msg = ERR_PTR(-ENOMEM);
@@ -2619,7 +2715,7 @@ static struct ceph_msg *create_request_m
} 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);
@@ -2670,7 +2766,7 @@ static struct ceph_msg *create_request_m
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);
@@ -2800,7 +2896,7 @@ static int __prepare_send_request(struct
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);
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -86,6 +86,10 @@ struct ceph_mds_reply_info_in {
s32 dir_pin;
struct ceph_timespec btime;
struct ceph_timespec snap_btime;
+ u8 *fscrypt_auth;
+ u8 *fscrypt_file;
+ u32 fscrypt_auth_len;
+ u32 fscrypt_file_len;
u64 rsnaps;
u64 change_attr;
};
@@ -278,6 +282,9 @@ 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 */
int r_request_release_offset;
const struct cred *r_cred;
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -20,6 +20,7 @@
#include "super.h"
#include "mds_client.h"
#include "cache.h"
+#include "crypto.h"
#include <linux/ceph/ceph_features.h>
#include <linux/ceph/decode.h>
@@ -1134,6 +1135,8 @@ static int ceph_set_super(struct super_b
s->s_time_max = U32_MAX;
s->s_flags |= SB_NODIRATIME | SB_NOATIME;
+ ceph_fscrypt_set_ops(s);
+
ret = set_anon_super_fc(s, fc);
if (ret != 0)
fsc->sb = NULL;
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -453,6 +453,13 @@ struct ceph_inode_info {
struct work_struct i_work;
unsigned long i_work_mask;
+
+#ifdef CONFIG_FS_ENCRYPTION
+ u32 fscrypt_auth_len;
+ u32 fscrypt_file_len;
+ u8 *fscrypt_auth;
+ u8 *fscrypt_file;
+#endif
};
struct ceph_netfs_request_data {
@@ -1076,7 +1083,13 @@ static inline int ceph_do_getattr(struct
}
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,
--- a/include/linux/ceph/ceph_fs.h
+++ b/include/linux/ceph/ceph_fs.h
@@ -359,14 +359,19 @@ 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.