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dlm for 3.11

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This set includes a number of SCTP related fixes in the dlm,
 and a few other minor fixes and changes.
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Merge tag 'dlm-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm

Pull dlm updates from David Teigland:
 "This set includes a number of SCTP related fixes in the dlm, and a few
  other minor fixes and changes."

* tag 'dlm-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
  dlm: Avoid LVB truncation
  dlm: log an error for unmanaged lockspaces
  dlm: config: using strlcpy instead of strncpy
  dlm: remove duplicated include from lowcomms.c
  dlm: disable nagle for SCTP
  dlm: retry failed SCTP sends
  dlm: try other IPs when sctp init assoc fails
  dlm: clear correct bit during sctp init failure handling
  dlm: set sctp assoc id during setup
  dlm: clear correct init bit during sctp setup
This commit is contained in:
Linus Torvalds 2013-07-02 09:52:07 -07:00
commit 6072a93b98
4 changed files with 149 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/dlm/config.c
View File

@ -138,8 +138,9 @@ static ssize_t cluster_cluster_name_read(struct dlm_cluster *cl, char *buf)
static ssize_t cluster_cluster_name_write(struct dlm_cluster *cl,
const char *buf, size_t len)
{
strncpy(dlm_config.ci_cluster_name, buf, DLM_LOCKSPACE_LEN);
strncpy(cl->cl_cluster_name, buf, DLM_LOCKSPACE_LEN);
strlcpy(dlm_config.ci_cluster_name, buf,
sizeof(dlm_config.ci_cluster_name));
strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name));
return len;
}

8
fs/dlm/lock.c
View File

@ -2038,8 +2038,8 @@ static void set_lvb_lock_pc(struct dlm_rsb *r, struct dlm_lkb *lkb,
b = dlm_lvb_operations[lkb->lkb_grmode + 1][lkb->lkb_rqmode + 1];
if (b == 1) {
int len = receive_extralen(ms);
if (len > DLM_RESNAME_MAXLEN)
len = DLM_RESNAME_MAXLEN;
if (len > r->res_ls->ls_lvblen)
len = r->res_ls->ls_lvblen;
memcpy(lkb->lkb_lvbptr, ms->m_extra, len);
lkb->lkb_lvbseq = ms->m_lvbseq;
}
@ -3893,8 +3893,8 @@ static int receive_lvb(struct dlm_ls *ls, struct dlm_lkb *lkb,
if (!lkb->lkb_lvbptr)
return -ENOMEM;
len = receive_extralen(ms);
if (len > DLM_RESNAME_MAXLEN)
len = DLM_RESNAME_MAXLEN;
if (len > ls->ls_lvblen)
len = ls->ls_lvblen;
memcpy(lkb->lkb_lvbptr, ms->m_extra, len);
}
return 0;

9
fs/dlm/lockspace.c
View File

@ -883,17 +883,24 @@ int dlm_release_lockspace(void *lockspace, int force)
void dlm_stop_lockspaces(void)
{
struct dlm_ls *ls;
int count;
restart:
count = 0;
spin_lock(&lslist_lock);
list_for_each_entry(ls, &lslist, ls_list) {
if (!test_bit(LSFL_RUNNING, &ls->ls_flags))
if (!test_bit(LSFL_RUNNING, &ls->ls_flags)) {
count++;
continue;
}
spin_unlock(&lslist_lock);
log_error(ls, "no userland control daemon, stopping lockspace");
dlm_ls_stop(ls);
goto restart;
}
spin_unlock(&lslist_lock);
if (count)
log_print("dlm user daemon left %d lockspaces", count);
}

177
fs/dlm/lowcomms.c
View File

@ -52,7 +52,6 @@
#include <linux/mutex.h>
#include <linux/sctp.h>
#include <linux/slab.h>
#include <linux/sctp.h>
#include <net/sctp/sctp.h>
#include <net/ipv6.h>
@ -126,6 +125,7 @@ struct connection {
struct connection *othercon;
struct work_struct rwork; /* Receive workqueue */
struct work_struct swork; /* Send workqueue */
bool try_new_addr;
};
#define sock2con(x) ((struct connection *)(x)->sk_user_data)
@ -144,6 +144,7 @@ struct dlm_node_addr {
struct list_head list;
int nodeid;
int addr_count;
int curr_addr_index;
struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
};
@ -310,7 +311,7 @@ static int addr_compare(struct sockaddr_storage *x, struct sockaddr_storage *y)
}
static int nodeid_to_addr(int nodeid, struct sockaddr_storage *sas_out,
struct sockaddr *sa_out)
struct sockaddr *sa_out, bool try_new_addr)
{
struct sockaddr_storage sas;
struct dlm_node_addr *na;
@ -320,8 +321,16 @@ static int nodeid_to_addr(int nodeid, struct sockaddr_storage *sas_out,
spin_lock(&dlm_node_addrs_spin);
na = find_node_addr(nodeid);
if (na && na->addr_count)
memcpy(&sas, na->addr[0], sizeof(struct sockaddr_storage));
if (na && na->addr_count) {
if (try_new_addr) {
na->curr_addr_index++;
if (na->curr_addr_index == na->addr_count)
na->curr_addr_index = 0;
}
memcpy(&sas, na->addr[na->curr_addr_index ],
sizeof(struct sockaddr_storage));
}
spin_unlock(&dlm_node_addrs_spin);
if (!na)
@ -353,19 +362,22 @@ static int addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid)
{
struct dlm_node_addr *na;
int rv = -EEXIST;
int addr_i;
spin_lock(&dlm_node_addrs_spin);
list_for_each_entry(na, &dlm_node_addrs, list) {
if (!na->addr_count)
continue;
if (!addr_compare(na->addr[0], addr))
continue;
*nodeid = na->nodeid;
rv = 0;
break;
for (addr_i = 0; addr_i < na->addr_count; addr_i++) {
if (addr_compare(na->addr[addr_i], addr)) {
*nodeid = na->nodeid;
rv = 0;
goto unlock;
}
}
}
unlock:
spin_unlock(&dlm_node_addrs_spin);
return rv;
}
@ -561,8 +573,23 @@ static void sctp_send_shutdown(sctp_assoc_t associd)
static void sctp_init_failed_foreach(struct connection *con)
{
/*
* Don't try to recover base con and handle race where the
* other node's assoc init creates a assoc and we get that
* notification, then we get a notification that our attempt
* failed due. This happens when we are still trying the primary
* address, but the other node has already tried secondary addrs
* and found one that worked.
*/
if (!con->nodeid || con->sctp_assoc)
return;
log_print("Retrying SCTP association init for node %d\n", con->nodeid);
con->try_new_addr = true;
con->sctp_assoc = 0;
if (test_and_clear_bit(CF_CONNECT_PENDING, &con->flags)) {
if (test_and_clear_bit(CF_INIT_PENDING, &con->flags)) {
if (!test_and_set_bit(CF_WRITE_PENDING, &con->flags))
queue_work(send_workqueue, &con->swork);
}
@ -579,15 +606,56 @@ static void sctp_init_failed(void)
mutex_unlock(&connections_lock);
}
static void retry_failed_sctp_send(struct connection *recv_con,
struct sctp_send_failed *sn_send_failed,
char *buf)
{
int len = sn_send_failed->ssf_length - sizeof(struct sctp_send_failed);
struct dlm_mhandle *mh;
struct connection *con;
char *retry_buf;
int nodeid = sn_send_failed->ssf_info.sinfo_ppid;
log_print("Retry sending %d bytes to node id %d", len, nodeid);
con = nodeid2con(nodeid, 0);
if (!con) {
log_print("Could not look up con for nodeid %d\n",
nodeid);
return;
}
mh = dlm_lowcomms_get_buffer(nodeid, len, GFP_NOFS, &retry_buf);
if (!mh) {
log_print("Could not allocate buf for retry.");
return;
}
memcpy(retry_buf, buf + sizeof(struct sctp_send_failed), len);
dlm_lowcomms_commit_buffer(mh);
/*
* If we got a assoc changed event before the send failed event then
* we only need to retry the send.
*/
if (con->sctp_assoc) {
if (!test_and_set_bit(CF_WRITE_PENDING, &con->flags))
queue_work(send_workqueue, &con->swork);
} else
sctp_init_failed_foreach(con);
}
/* Something happened to an association */
static void process_sctp_notification(struct connection *con,
struct msghdr *msg, char *buf)
{
union sctp_notification *sn = (union sctp_notification *)buf;
if (sn->sn_header.sn_type == SCTP_ASSOC_CHANGE) {
switch (sn->sn_header.sn_type) {
case SCTP_SEND_FAILED:
retry_failed_sctp_send(con, &sn->sn_send_failed, buf);
break;
case SCTP_ASSOC_CHANGE:
switch (sn->sn_assoc_change.sac_state) {
case SCTP_COMM_UP:
case SCTP_RESTART:
{
@ -662,9 +730,11 @@ static void process_sctp_notification(struct connection *con,
log_print("connecting to %d sctp association %d",
nodeid, (int)sn->sn_assoc_change.sac_assoc_id);
new_con->sctp_assoc = sn->sn_assoc_change.sac_assoc_id;
new_con->try_new_addr = false;
/* Send any pending writes */
clear_bit(CF_CONNECT_PENDING, &new_con->flags);
clear_bit(CF_INIT_PENDING, &con->flags);
clear_bit(CF_INIT_PENDING, &new_con->flags);
if (!test_and_set_bit(CF_WRITE_PENDING, &new_con->flags)) {
queue_work(send_workqueue, &new_con->swork);
}
@ -683,14 +753,10 @@ static void process_sctp_notification(struct connection *con,
}
break;
/* We don't know which INIT failed, so clear the PENDING flags
* on them all. if assoc_id is zero then it will then try
* again */
case SCTP_CANT_STR_ASSOC:
{
/* Will retry init when we get the send failed notification */
log_print("Can't start SCTP association - retrying");
sctp_init_failed();
}
break;
@ -699,6 +765,8 @@ static void process_sctp_notification(struct connection *con,
(int)sn->sn_assoc_change.sac_assoc_id,
sn->sn_assoc_change.sac_state);
}
default:
; /* fall through */
}
}
@ -958,6 +1026,24 @@ static void free_entry(struct writequeue_entry *e)
kfree(e);
}
/*
* writequeue_entry_complete - try to delete and free write queue entry
* @e: write queue entry to try to delete
* @completed: bytes completed
*
* writequeue_lock must be held.
*/
static void writequeue_entry_complete(struct writequeue_entry *e, int completed)
{
e->offset += completed;
e->len -= completed;
if (e->len == 0 && e->users == 0) {
list_del(&e->list);
free_entry(e);
}
}
/* Initiate an SCTP association.
This is a special case of send_to_sock() in that we don't yet have a
peeled-off socket for this association, so we use the listening socket
@ -977,15 +1063,14 @@ static void sctp_init_assoc(struct connection *con)
int addrlen;
struct kvec iov[1];
mutex_lock(&con->sock_mutex);
if (test_and_set_bit(CF_INIT_PENDING, &con->flags))
return;
goto unlock;
if (con->retries++ > MAX_CONNECT_RETRIES)
return;
if (nodeid_to_addr(con->nodeid, NULL, (struct sockaddr *)&rem_addr)) {
if (nodeid_to_addr(con->nodeid, NULL, (struct sockaddr *)&rem_addr,
con->try_new_addr)) {
log_print("no address for nodeid %d", con->nodeid);
return;
goto unlock;
}
base_con = nodeid2con(0, 0);
BUG_ON(base_con == NULL);
@ -1003,17 +1088,25 @@ static void sctp_init_assoc(struct connection *con)
if (list_empty(&con->writequeue)) {
spin_unlock(&con->writequeue_lock);
log_print("writequeue empty for nodeid %d", con->nodeid);
return;
goto unlock;
}
e = list_first_entry(&con->writequeue, struct writequeue_entry, list);
len = e->len;
offset = e->offset;
spin_unlock(&con->writequeue_lock);
/* Send the first block off the write queue */
iov[0].iov_base = page_address(e->page)+offset;
iov[0].iov_len = len;
spin_unlock(&con->writequeue_lock);
if (rem_addr.ss_family == AF_INET) {
struct sockaddr_in *sin = (struct sockaddr_in *)&rem_addr;
log_print("Trying to connect to %pI4", &sin->sin_addr.s_addr);
} else {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&rem_addr;
log_print("Trying to connect to %pI6", &sin6->sin6_addr);
}
cmsg = CMSG_FIRSTHDR(&outmessage);
cmsg->cmsg_level = IPPROTO_SCTP;
@ -1021,8 +1114,9 @@ static void sctp_init_assoc(struct connection *con)
cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
sinfo = CMSG_DATA(cmsg);
memset(sinfo, 0x00, sizeof(struct sctp_sndrcvinfo));
sinfo->sinfo_ppid = cpu_to_le32(dlm_our_nodeid());
sinfo->sinfo_ppid = cpu_to_le32(con->nodeid);
outmessage.msg_controllen = cmsg->cmsg_len;
sinfo->sinfo_flags |= SCTP_ADDR_OVER;
ret = kernel_sendmsg(base_con->sock, &outmessage, iov, 1, len);
if (ret < 0) {
@ -1035,15 +1129,12 @@ static void sctp_init_assoc(struct connection *con)
}
else {
spin_lock(&con->writequeue_lock);
e->offset += ret;
e->len -= ret;
if (e->len == 0 && e->users == 0) {
list_del(&e->list);
free_entry(e);
}
writequeue_entry_complete(e, ret);
spin_unlock(&con->writequeue_lock);
}
unlock:
mutex_unlock(&con->sock_mutex);
}
/* Connect a new socket to its peer */
@ -1075,7 +1166,7 @@ static void tcp_connect_to_sock(struct connection *con)
goto out_err;
memset(&saddr, 0, sizeof(saddr));
result = nodeid_to_addr(con->nodeid, &saddr, NULL);
result = nodeid_to_addr(con->nodeid, &saddr, NULL, false);
if (result < 0) {
log_print("no address for nodeid %d", con->nodeid);
goto out_err;
@ -1254,6 +1345,7 @@ static int sctp_listen_for_all(void)
int result = -EINVAL, num = 1, i, addr_len;
struct connection *con = nodeid2con(0, GFP_NOFS);
int bufsize = NEEDED_RMEM;
int one = 1;
if (!con)
return -ENOMEM;
@ -1288,6 +1380,11 @@ static int sctp_listen_for_all(void)
goto create_delsock;
}
result = kernel_setsockopt(sock, SOL_SCTP, SCTP_NODELAY, (char *)&one,
sizeof(one));
if (result < 0)
log_print("Could not set SCTP NODELAY error %d\n", result);
/* Init con struct */
sock->sk->sk_user_data = con;
con->sock = sock;
@ -1493,13 +1590,7 @@ static void send_to_sock(struct connection *con)
}
spin_lock(&con->writequeue_lock);
e->offset += ret;
e->len -= ret;
if (e->len == 0 && e->users == 0) {
list_del(&e->list);
free_entry(e);
}
writequeue_entry_complete(e, ret);
}
spin_unlock(&con->writequeue_lock);
out: