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ceph: add feature bits to connection handshake (protocol change) 

Define supported and required feature set.  Fail connection if the server
requires features we do not support (TAG_FEATURES), or if the server does
not support features we require.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2009-12-23 09:30:21 -08:00
parent 6df058c025
commit 04a419f908
4 changed files with 53 additions and 17 deletions
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6
fs/ceph/ceph_fs.h
View File

@ -50,6 +50,12 @@
#define CEPH_MAX_MON 31
/*
* feature bits
*/
#define CEPH_FEATURE_SUPPORTED 0
#define CEPH_FEATURE_REQUIRED 0
/*
* ceph_file_layout - describe data layout for a file/inode

12
fs/ceph/dir.c
View File

@ -1135,9 +1135,9 @@ void ceph_dentry_lru_add(struct dentry *dn)
{
struct ceph_dentry_info *di = ceph_dentry(dn);
struct ceph_mds_client *mdsc;
dout("dentry_lru_add %p %p\t%.*s\n",
di, dn, dn->d_name.len, dn->d_name.name);
dout("dentry_lru_add %p %p '%.*s'\n", di, dn,
dn->d_name.len, dn->d_name.name);
if (di) {
mdsc = &ceph_client(dn->d_sb)->mdsc;
spin_lock(&mdsc->dentry_lru_lock);
@ -1151,9 +1151,9 @@ void ceph_dentry_lru_touch(struct dentry *dn)
{
struct ceph_dentry_info *di = ceph_dentry(dn);
struct ceph_mds_client *mdsc;
dout("dentry_lru_touch %p %p\t%.*s\n",
di, dn, dn->d_name.len, dn->d_name.name);
dout("dentry_lru_touch %p %p '%.*s'\n", di, dn,
dn->d_name.len, dn->d_name.name);
if (di) {
mdsc = &ceph_client(dn->d_sb)->mdsc;
spin_lock(&mdsc->dentry_lru_lock);
@ -1167,8 +1167,8 @@ void ceph_dentry_lru_del(struct dentry *dn)
struct ceph_dentry_info *di = ceph_dentry(dn);
struct ceph_mds_client *mdsc;
dout("dentry_lru_del %p %p\t%.*s\n",
di, dn, dn->d_name.len, dn->d_name.name);
dout("dentry_lru_del %p %p '%.*s'\n", di, dn,
dn->d_name.len, dn->d_name.name);
if (di) {
mdsc = &ceph_client(dn->d_sb)->mdsc;
spin_lock(&mdsc->dentry_lru_lock);

47
fs/ceph/messenger.c
View File

@ -631,6 +631,7 @@ static void prepare_write_connect(struct ceph_messenger *msgr,
dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con,
con->connect_seq, global_seq, proto);
con->out_connect.features = CEPH_FEATURE_SUPPORTED;
con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT);
con->out_connect.connect_seq = cpu_to_le32(con->connect_seq);
con->out_connect.global_seq = cpu_to_le32(global_seq);
@ -1080,15 +1081,37 @@ static int process_banner(struct ceph_connection *con)
return 0;
}
static void fail_protocol(struct ceph_connection *con)
{
reset_connection(con);
set_bit(CLOSED, &con->state); /* in case there's queued work */
mutex_unlock(&con->mutex);
if (con->ops->bad_proto)
con->ops->bad_proto(con);
mutex_lock(&con->mutex);
}
static int process_connect(struct ceph_connection *con)
{
u64 sup_feat = CEPH_FEATURE_SUPPORTED;
u64 req_feat = CEPH_FEATURE_REQUIRED;
u64 server_feat = le64_to_cpu(con->in_reply.features);
dout("process_connect on %p tag %d\n", con, (int)con->in_tag);
switch (con->in_reply.tag) {
case CEPH_MSGR_TAG_FEATURES:
pr_err("%s%lld %s feature set mismatch,"
" my %llx < server's %llx, missing %llx\n",
ENTITY_NAME(con->peer_name),
pr_addr(&con->peer_addr.in_addr),
sup_feat, server_feat, server_feat & ~sup_feat);
con->error_msg = "missing required protocol features";
fail_protocol(con);
return -1;
case CEPH_MSGR_TAG_BADPROTOVER:
dout("process_connect got BADPROTOVER my %d != their %d\n",
le32_to_cpu(con->out_connect.protocol_version),
le32_to_cpu(con->in_reply.protocol_version));
pr_err("%s%lld %s protocol version mismatch,"
" my %d != server's %d\n",
ENTITY_NAME(con->peer_name),
@ -1096,13 +1119,7 @@ static int process_connect(struct ceph_connection *con)
le32_to_cpu(con->out_connect.protocol_version),
le32_to_cpu(con->in_reply.protocol_version));
con->error_msg = "protocol version mismatch";
reset_connection(con);
set_bit(CLOSED, &con->state); /* in case there's queued work */
mutex_unlock(&con->mutex);
if (con->ops->bad_proto)
con->ops->bad_proto(con);
mutex_lock(&con->mutex);
fail_protocol(con);
return -1;
case CEPH_MSGR_TAG_BADAUTHORIZER:
@ -1173,6 +1190,16 @@ static int process_connect(struct ceph_connection *con)
break;
case CEPH_MSGR_TAG_READY:
if (req_feat & ~server_feat) {
pr_err("%s%lld %s protocol feature mismatch,"
" my required %llx > server's %llx, need %llx\n",
ENTITY_NAME(con->peer_name),
pr_addr(&con->peer_addr.in_addr),
req_feat, server_feat, req_feat & ~server_feat);
con->error_msg = "missing required protocol features";
fail_protocol(con);
return -1;
}
clear_bit(CONNECTING, &con->state);
con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq);
con->connect_seq++;

5
fs/ceph/msgr.h
View File

@ -21,7 +21,7 @@
* whenever the wire protocol changes. try to keep this string length
* constant.
*/
#define CEPH_BANNER "ceph v025"
#define CEPH_BANNER "ceph v026"
#define CEPH_BANNER_MAX_LEN 30
@ -100,12 +100,14 @@ struct ceph_entity_inst {
#define CEPH_MSGR_TAG_KEEPALIVE 9 /* just a keepalive byte! */
#define CEPH_MSGR_TAG_BADPROTOVER 10 /* bad protocol version */
#define CEPH_MSGR_TAG_BADAUTHORIZER 11 /* bad authorizer */
#define CEPH_MSGR_TAG_FEATURES 12 /* insufficient features */
/*
* connection negotiation
*/
struct ceph_msg_connect {
__le64 features; /* supported feature bits */
__le32 host_type; /* CEPH_ENTITY_TYPE_* */
__le32 global_seq; /* count connections initiated by this host */
__le32 connect_seq; /* count connections initiated in this session */
@ -117,6 +119,7 @@ struct ceph_msg_connect {
struct ceph_msg_connect_reply {
__u8 tag;
__le64 features; /* feature bits for this session */
__le32 global_seq;
__le32 connect_seq;
__le32 protocol_version;