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ceph: fail the request if the peer MDS doesn't support getvxattr op

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Just fail the request instead sending the request out, or the peer
MDS will crash.

Link: https://tracker.ceph.com/issues/56529
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Xiubo Li 2022-07-27 12:29:10 +08:00 committed by Ilya Dryomov
parent f791357330
commit 6eb06c4621
3 changed files with 17 additions and 1 deletions
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1
fs/ceph/inode.c
View file

@ -2356,6 +2356,7 @@ int ceph_do_getvxattr(struct inode *inode, const char *name, void *value,
goto out;
}
req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR;
req->r_path2 = kstrdup(name, GFP_NOFS);
if (!req->r_path2) {
err = -ENOMEM;

11
fs/ceph/mds_client.c
View file

@ -2318,6 +2318,7 @@ ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode)
INIT_LIST_HEAD(&req->r_unsafe_dir_item);
INIT_LIST_HEAD(&req->r_unsafe_target_item);
req->r_fmode = -1;
req->r_feature_needed = -1;
kref_init(&req->r_kref);
RB_CLEAR_NODE(&req->r_node);
INIT_LIST_HEAD(&req->r_wait);
@ -2916,6 +2917,16 @@ static void __do_request(struct ceph_mds_client *mdsc,
dout("do_request mds%d session %p state %s\n", mds, session,
ceph_session_state_name(session->s_state));
/*
* The old ceph will crash the MDSs when see unknown OPs
*/
if (req->r_feature_needed > 0 &&
!test_bit(req->r_feature_needed, &session->s_features)) {
err = -EOPNOTSUPP;
goto out_session;
}
if (session->s_state != CEPH_MDS_SESSION_OPEN &&
session->s_state != CEPH_MDS_SESSION_HUNG) {
/*

6
fs/ceph/mds_client.h
View file

@ -31,8 +31,9 @@ enum ceph_feature_type {
CEPHFS_FEATURE_METRIC_COLLECT,
CEPHFS_FEATURE_ALTERNATE_NAME,
CEPHFS_FEATURE_NOTIFY_SESSION_STATE,
CEPHFS_FEATURE_OP_GETVXATTR,
CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_NOTIFY_SESSION_STATE,
CEPHFS_FEATURE_MAX = CEPHFS_FEATURE_OP_GETVXATTR,
};
#define CEPHFS_FEATURES_CLIENT_SUPPORTED { \
@ -44,6 +45,7 @@ enum ceph_feature_type {
CEPHFS_FEATURE_DELEG_INO, \
CEPHFS_FEATURE_METRIC_COLLECT, \
CEPHFS_FEATURE_NOTIFY_SESSION_STATE, \
CEPHFS_FEATURE_OP_GETVXATTR, \
}
/*
@ -336,6 +338,8 @@ struct ceph_mds_request {
long long r_dir_ordered_cnt;
int r_readdir_cache_idx;
int r_feature_needed;
struct ceph_cap_reservation r_caps_reservation;
};