From: Jeff Layton <jlayton@kernel.org>
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 23/24] ceph: make ceph_get_name decrypt filenames
Date: Fri, 25 Jun 2021 09:58:33 -0400 [thread overview]
Message-ID: <20210625135834.12934-24-jlayton@kernel.org> (raw)
In-Reply-To: <20210625135834.12934-1-jlayton@kernel.org>
When we do a lookupino to the MDS, we get a filename in the trace.
ceph_get_name uses that name directly, so we must properly decrypt
it before copying it to the name buffer.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
fs/ceph/export.c | 44 ++++++++++++++++++++++++++++++++------------
1 file changed, 32 insertions(+), 12 deletions(-)
diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index 1d65934c1262..e468882068af 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -7,6 +7,7 @@
#include "super.h"
#include "mds_client.h"
+#include "crypto.h"
/*
* Basic fh
@@ -524,7 +525,9 @@ static int ceph_get_name(struct dentry *parent, char *name,
{
struct ceph_mds_client *mdsc;
struct ceph_mds_request *req;
+ struct inode *dir = d_inode(parent);
struct inode *inode = d_inode(child);
+ struct ceph_mds_reply_info_parsed *rinfo;
int err;
if (ceph_snap(inode) != CEPH_NOSNAP)
@@ -536,30 +539,47 @@ static int ceph_get_name(struct dentry *parent, char *name,
if (IS_ERR(req))
return PTR_ERR(req);
- inode_lock(d_inode(parent));
-
+ inode_lock(dir);
req->r_inode = inode;
ihold(inode);
req->r_ino2 = ceph_vino(d_inode(parent));
- req->r_parent = d_inode(parent);
- ihold(req->r_parent);
+ req->r_parent = dir;
+ ihold(dir);
set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
req->r_num_caps = 2;
err = ceph_mdsc_do_request(mdsc, NULL, req);
+ inode_unlock(dir);
- inode_unlock(d_inode(parent));
+ if (err)
+ goto out;
- if (!err) {
- struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
+ rinfo = &req->r_reply_info;
+ if (!IS_ENCRYPTED(dir)) {
memcpy(name, rinfo->dname, rinfo->dname_len);
name[rinfo->dname_len] = 0;
- dout("get_name %p ino %llx.%llx name %s\n",
- child, ceph_vinop(inode), name);
} else {
- dout("get_name %p ino %llx.%llx err %d\n",
- child, ceph_vinop(inode), err);
- }
+ struct fscrypt_str oname = FSTR_INIT(NULL, 0);
+ struct ceph_fname fname = { .dir = dir,
+ .name = rinfo->dname,
+ .ctext = rinfo->altname,
+ .name_len = rinfo->dname_len,
+ .ctext_len = rinfo->altname_len };
+
+ err = ceph_fname_alloc_buffer(dir, &oname);
+ if (err < 0)
+ goto out;
+ err = ceph_fname_to_usr(&fname, NULL, &oname, NULL);
+ if (!err) {
+ memcpy(name, oname.name, oname.len);
+ name[oname.len] = 0;
+ }
+ ceph_fname_free_buffer(dir, &oname);
+ }
+out:
+ dout("get_name %p ino %llx.%llx err %d %s%s\n",
+ child, ceph_vinop(inode), err,
+ err ? "" : "name ", err ? "" : name);
ceph_mdsc_put_request(req);
return err;
}
--
2.31.1
next prev parent reply other threads:[~2021-06-25 13:59 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-25 13:58 [RFC PATCH v7 00/24] ceph+fscrypt: context, filename and symlink support Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 01/24] vfs: export new_inode_pseudo Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 02/24] fscrypt: export fscrypt_base64_encode and fscrypt_base64_decode Jeff Layton
2021-07-11 17:40 ` Eric Biggers
2021-07-12 11:55 ` Jeff Layton
2021-07-12 14:22 ` Eric Biggers
2021-07-12 14:32 ` Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 03/24] fscrypt: export fscrypt_fname_encrypt and fscrypt_fname_encrypted_size Jeff Layton
2021-07-11 17:43 ` Eric Biggers
2021-06-25 13:58 ` [RFC PATCH v7 04/24] fscrypt: add fscrypt_context_for_new_inode Jeff Layton
2021-07-11 17:44 ` Eric Biggers
2021-06-25 13:58 ` [RFC PATCH v7 05/24] ceph: preallocate inode for ops that may create one Jeff Layton
2021-07-07 3:37 ` Xiubo Li
2021-07-07 12:05 ` Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 06/24] ceph: parse new fscrypt_auth and fscrypt_file fields in inode traces Jeff Layton
2021-07-07 3:53 ` Xiubo Li
2021-07-07 12:09 ` Jeff Layton
2021-07-07 12:46 ` Xiubo Li
2021-07-07 10:47 ` Luis Henriques
2021-07-07 11:19 ` Xiubo Li
2021-07-07 12:19 ` Jeff Layton
2021-07-07 14:32 ` Luis Henriques
2021-07-07 14:56 ` Luis Henriques
2021-07-08 2:56 ` Xiubo Li
2021-07-08 11:26 ` Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 07/24] ceph: add fscrypt_* handling to caps.c Jeff Layton
2021-07-07 7:20 ` Xiubo Li
2021-07-07 12:02 ` Jeff Layton
2021-07-07 12:47 ` Xiubo Li
2021-07-11 23:00 ` Eric Biggers
2021-07-12 13:22 ` Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 08/24] ceph: add ability to set fscrypt_auth via setattr Jeff Layton
2021-07-07 8:11 ` Xiubo Li
2021-07-07 12:10 ` Jeff Layton
2021-07-07 10:47 ` Luis Henriques
2021-07-07 12:25 ` Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 09/24] ceph: crypto context handling for ceph Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 10/24] ceph: implement -o test_dummy_encryption mount option Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 11/24] ceph: add routine to create fscrypt context prior to RPC Jeff Layton
2021-07-07 10:48 ` Luis Henriques
2021-07-07 12:29 ` Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 12/24] ceph: add fscrypt ioctls Jeff Layton
2021-07-08 7:30 ` Xiubo Li
2021-07-08 11:26 ` Jeff Layton
2021-07-08 11:32 ` Xiubo Li
2021-06-25 13:58 ` [RFC PATCH v7 13/24] ceph: decode alternate_name in lease info Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 14/24] ceph: make ceph_msdc_build_path use ref-walk Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 15/24] ceph: add encrypted fname handling to ceph_mdsc_build_path Jeff Layton
2021-07-11 22:53 ` Eric Biggers
2021-07-12 12:36 ` Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 16/24] ceph: send altname in MClientRequest Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 17/24] ceph: properly set DCACHE_NOKEY_NAME flag in lookup Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 18/24] ceph: make d_revalidate call fscrypt revalidator for encrypted dentries Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 19/24] ceph: add helpers for converting names for userland presentation Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 20/24] ceph: add fscrypt support to ceph_fill_trace Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 21/24] ceph: add support to readdir for encrypted filenames Jeff Layton
2021-06-25 13:58 ` [RFC PATCH v7 22/24] ceph: create symlinks with encrypted and base64-encoded targets Jeff Layton
2021-06-25 13:58 ` Jeff Layton [this message]
2021-06-25 13:58 ` [RFC PATCH v7 24/24] ceph: add a new ceph.fscrypt.auth vxattr Jeff Layton
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