Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-21 19:41:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

drbd: rcu_read_lock() and rcu_dereference() for tconn->net_conf

Browse Source 
Removing the get_net_conf()/put_net_conf() calls

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2011-04-19 17:10:19 +02:00
parent b032b6fa35
commit 44ed167da7
8 changed files with 401 additions and 216 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/block/drbd/drbd_int.h
View File

@ -832,7 +832,7 @@ struct drbd_tconn { /* is a resource from the config file */
struct mutex cstate_mutex; /* Protects graceful disconnects */
unsigned long flags;
struct net_conf *net_conf; /* protected by get_net_conf() and put_net_conf() */
struct net_conf *net_conf; /* content protected by rcu */
atomic_t net_cnt; /* Users of net_conf */
wait_queue_head_t net_cnt_wait;
wait_queue_head_t ping_wait; /* Woken upon reception of a ping, and a state change */
@ -2059,11 +2059,14 @@ static inline void drbd_get_syncer_progress(struct drbd_conf *mdev,
* maybe re-implement using semaphores? */
static inline int drbd_get_max_buffers(struct drbd_conf *mdev)
{
int mxb = 1000000; /* arbitrary limit on open requests */
if (get_net_conf(mdev->tconn)) {
mxb = mdev->tconn->net_conf->max_buffers;
put_net_conf(mdev->tconn);
}
struct net_conf *nc;
int mxb;
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
mxb = nc ? nc->max_buffers : 1000000; /* arbitrary limit on open requests */
rcu_read_unlock();
return mxb;
}

78
drivers/block/drbd/drbd_main.c
View File

@ -843,15 +843,19 @@ int drbd_send_sync_param(struct drbd_conf *mdev)
int size;
const int apv = mdev->tconn->agreed_pro_version;
enum drbd_packet cmd;
struct net_conf *nc;
sock = &mdev->tconn->data;
p = drbd_prepare_command(mdev, sock);
if (!p)
return -EIO;
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
size = apv <= 87 ? sizeof(struct p_rs_param)
: apv == 88 ? sizeof(struct p_rs_param)
+ strlen(mdev->tconn->net_conf->verify_alg) + 1
+ strlen(nc->verify_alg) + 1
: apv <= 94 ? sizeof(struct p_rs_param_89)
: /* apv >= 95 */ sizeof(struct p_rs_param_95);
@ -876,9 +880,10 @@ int drbd_send_sync_param(struct drbd_conf *mdev)
}
if (apv >= 88)
strcpy(p->verify_alg, mdev->tconn->net_conf->verify_alg);
strcpy(p->verify_alg, nc->verify_alg);
if (apv >= 89)
strcpy(p->csums_alg, mdev->tconn->net_conf->csums_alg);
strcpy(p->csums_alg, nc->csums_alg);
rcu_read_unlock();
return drbd_send_command(mdev, sock, cmd, size, NULL, 0);
}
@ -887,36 +892,44 @@ int drbd_send_protocol(struct drbd_tconn *tconn)
{
struct drbd_socket *sock;
struct p_protocol *p;
struct net_conf *nc;
int size, cf;
if (tconn->net_conf->dry_run && tconn->agreed_pro_version < 92) {
conn_err(tconn, "--dry-run is not supported by peer");
return -EOPNOTSUPP;
}
sock = &tconn->data;
p = conn_prepare_command(tconn, sock);
if (!p)
return -EIO;
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
if (nc->dry_run && tconn->agreed_pro_version < 92) {
rcu_read_unlock();
mutex_unlock(&sock->mutex);
conn_err(tconn, "--dry-run is not supported by peer");
return -EOPNOTSUPP;
}
size = sizeof(*p);
if (tconn->agreed_pro_version >= 87)
size += strlen(tconn->net_conf->integrity_alg) + 1;
size += strlen(nc->integrity_alg) + 1;
p->protocol = cpu_to_be32(tconn->net_conf->wire_protocol);
p->after_sb_0p = cpu_to_be32(tconn->net_conf->after_sb_0p);
p->after_sb_1p = cpu_to_be32(tconn->net_conf->after_sb_1p);
p->after_sb_2p = cpu_to_be32(tconn->net_conf->after_sb_2p);
p->two_primaries = cpu_to_be32(tconn->net_conf->two_primaries);
p->protocol = cpu_to_be32(nc->wire_protocol);
p->after_sb_0p = cpu_to_be32(nc->after_sb_0p);
p->after_sb_1p = cpu_to_be32(nc->after_sb_1p);
p->after_sb_2p = cpu_to_be32(nc->after_sb_2p);
p->two_primaries = cpu_to_be32(nc->two_primaries);
cf = 0;
if (tconn->net_conf->want_lose)
if (nc->want_lose)
cf |= CF_WANT_LOSE;
if (tconn->net_conf->dry_run)
if (nc->dry_run)
cf |= CF_DRY_RUN;
p->conn_flags = cpu_to_be32(cf);
if (tconn->agreed_pro_version >= 87)
strcpy(p->integrity_alg, tconn->net_conf->integrity_alg);
strcpy(p->integrity_alg, nc->integrity_alg);
rcu_read_unlock();
return conn_send_command(tconn, sock, P_PROTOCOL, size, NULL, 0);
}
@ -940,7 +953,9 @@ int _drbd_send_uuids(struct drbd_conf *mdev, u64 uuid_flags)
mdev->comm_bm_set = drbd_bm_total_weight(mdev);
p->uuid[UI_SIZE] = cpu_to_be64(mdev->comm_bm_set);
uuid_flags |= mdev->tconn->net_conf->want_lose ? 1 : 0;
rcu_read_lock();
uuid_flags |= rcu_dereference(mdev->tconn->net_conf)->want_lose ? 1 : 0;
rcu_read_unlock();
uuid_flags |= test_bit(CRASHED_PRIMARY, &mdev->flags) ? 2 : 0;
uuid_flags |= mdev->new_state_tmp.disk == D_INCONSISTENT ? 4 : 0;
p->uuid[UI_FLAGS] = cpu_to_be64(uuid_flags);
@ -1136,12 +1151,14 @@ int fill_bitmap_rle_bits(struct drbd_conf *mdev,
unsigned long rl;
unsigned len;
unsigned toggle;
int bits;
int bits, use_rle;
/* may we use this feature? */
if ((mdev->tconn->net_conf->use_rle == 0) ||
(mdev->tconn->agreed_pro_version < 90))
return 0;
rcu_read_lock();
use_rle = rcu_dereference(mdev->tconn->net_conf)->use_rle;
rcu_read_unlock();
if (!use_rle || mdev->tconn->agreed_pro_version < 90)
return 0;
if (c->bit_offset >= c->bm_bits)
return 0; /* nothing to do. */
@ -1812,7 +1829,9 @@ int drbd_send(struct drbd_tconn *tconn, struct socket *sock,
msg.msg_flags = msg_flags | MSG_NOSIGNAL;
if (sock == tconn->data.socket) {
tconn->ko_count = tconn->net_conf->ko_count;
rcu_read_lock();
tconn->ko_count = rcu_dereference(tconn->net_conf)->ko_count;
rcu_read_unlock();
drbd_update_congested(tconn);
}
do {
@ -3235,15 +3254,18 @@ const char *cmdname(enum drbd_packet cmd)
*/
int drbd_wait_misc(struct drbd_conf *mdev, struct drbd_interval *i)
{
struct net_conf *net_conf = mdev->tconn->net_conf;
struct net_conf *nc;
DEFINE_WAIT(wait);
long timeout;
if (!net_conf)
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
if (!nc) {
rcu_read_unlock();
return -ETIMEDOUT;
timeout = MAX_SCHEDULE_TIMEOUT;
if (net_conf->ko_count)
timeout = net_conf->timeout * HZ / 10 * net_conf->ko_count;
}
timeout = nc->ko_count ? nc->timeout * HZ / 10 * nc->ko_count : MAX_SCHEDULE_TIMEOUT;
rcu_read_unlock();
/* Indicate to wake up mdev->misc_wait on progress. */
i->waiting = true;

188
drivers/block/drbd/drbd_nl.c
View File

@ -257,27 +257,30 @@ static int drbd_adm_finish(struct genl_info *info, int retcode)
static void setup_khelper_env(struct drbd_tconn *tconn, char **envp)
{
char *afs;
struct net_conf *nc;
if (get_net_conf(tconn)) {
switch (((struct sockaddr *)tconn->net_conf->peer_addr)->sa_family) {
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
if (nc) {
switch (((struct sockaddr *)nc->peer_addr)->sa_family) {
case AF_INET6:
afs = "ipv6";
snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI6",
&((struct sockaddr_in6 *)tconn->net_conf->peer_addr)->sin6_addr);
&((struct sockaddr_in6 *)nc->peer_addr)->sin6_addr);
break;
case AF_INET:
afs = "ipv4";
snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
&((struct sockaddr_in *)tconn->net_conf->peer_addr)->sin_addr);
&((struct sockaddr_in *)nc->peer_addr)->sin_addr);
break;
default:
afs = "ssocks";
snprintf(envp[4], 60, "DRBD_PEER_ADDRESS=%pI4",
&((struct sockaddr_in *)tconn->net_conf->peer_addr)->sin_addr);
&((struct sockaddr_in *)nc->peer_addr)->sin_addr);
}
snprintf(envp[3], 20, "DRBD_PEER_AF=%s", afs);
put_net_conf(tconn);
}
rcu_read_unlock();
}
int drbd_khelper(struct drbd_conf *mdev, char *cmd)
@ -493,6 +496,7 @@ drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
{
const int max_tries = 4;
enum drbd_state_rv rv = SS_UNKNOWN_ERROR;
struct net_conf *nc;
int try = 0;
int forced = 0;
union drbd_state mask, val;
@ -550,7 +554,12 @@ drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
if (rv == SS_TWO_PRIMARIES) {
/* Maybe the peer is detected as dead very soon...
retry at most once more in this case. */
schedule_timeout_interruptible((mdev->tconn->net_conf->ping_timeo+1)*HZ/10);
int timeo;
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
timeo = nc ? (nc->ping_timeo + 1) * HZ / 10 : 1;
rcu_read_unlock();
schedule_timeout_interruptible(timeo);
if (try < max_tries)
try = max_tries - 1;
continue;
@ -580,10 +589,11 @@ drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
put_ldev(mdev);
}
} else {
if (get_net_conf(mdev->tconn)) {
mdev->tconn->net_conf->want_lose = 0;
put_net_conf(mdev->tconn);
}
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
if (nc)
nc->want_lose = 0;
rcu_read_unlock();
set_disk_ro(mdev->vdisk, false);
if (get_ldev(mdev)) {
if (((mdev->state.conn < C_CONNECTED ||
@ -1193,6 +1203,7 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
struct lru_cache *resync_lru = NULL;
union drbd_state ns, os;
enum drbd_state_rv rv;
struct net_conf *nc;
int cp_discovered = 0;
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
@ -1256,14 +1267,16 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
goto fail;
}
if (get_net_conf(mdev->tconn)) {
int prot = mdev->tconn->net_conf->wire_protocol;
put_net_conf(mdev->tconn);
if (nbc->dc.fencing == FP_STONITH && prot == DRBD_PROT_A) {
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
if (nc) {
if (nbc->dc.fencing == FP_STONITH && nc->wire_protocol == DRBD_PROT_A) {
rcu_read_unlock();
retcode = ERR_STONITH_AND_PROT_A;
goto fail;
}
}
rcu_read_unlock();
bdev = blkdev_get_by_path(nbc->dc.backing_dev,
FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev);
@ -1666,42 +1679,30 @@ static bool conn_ov_running(struct drbd_tconn *tconn)
}
static enum drbd_ret_code
check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf)
_check_net_options(struct drbd_tconn *tconn, struct net_conf *old_conf, struct net_conf *new_conf)
{
struct drbd_conf *mdev;
int i;
if (tconn->net_conf && tconn->agreed_pro_version < 100 &&
if (old_conf && tconn->agreed_pro_version < 100 &&
tconn->cstate == C_WF_REPORT_PARAMS &&
new_conf->wire_protocol != tconn->net_conf->wire_protocol)
new_conf->wire_protocol != old_conf->wire_protocol)
return ERR_NEED_APV_100;
if (new_conf->two_primaries &&
(new_conf->wire_protocol != DRBD_PROT_C))
return ERR_NOT_PROTO_C;
rcu_read_lock();
idr_for_each_entry(&tconn->volumes, mdev, i) {
if (get_ldev(mdev)) {
enum drbd_fencing_p fp = mdev->ldev->dc.fencing;
put_ldev(mdev);
if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) {
rcu_read_unlock();
if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH)
return ERR_STONITH_AND_PROT_A;
}
}
if (mdev->state.role == R_PRIMARY && new_conf->want_lose) {
rcu_read_unlock();
if (mdev->state.role == R_PRIMARY && new_conf->want_lose)
return ERR_DISCARD;
}
if (!mdev->bitmap) {
if(drbd_bm_init(mdev)) {
rcu_read_unlock();
return ERR_NOMEM;
}
}
}
rcu_read_unlock();
if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A)
return ERR_CONG_NOT_PROTO_A;
@ -1709,11 +1710,33 @@ check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf)
return NO_ERROR;
}
static enum drbd_ret_code
check_net_options(struct drbd_tconn *tconn, struct net_conf *new_conf)
{
static enum drbd_ret_code rv;
struct drbd_conf *mdev;
int i;
rcu_read_lock();
rv = _check_net_options(tconn, rcu_dereference(tconn->net_conf), new_conf);
rcu_read_unlock();
/* tconn->volumes protected by genl_lock() here */
idr_for_each_entry(&tconn->volumes, mdev, i) {
if (!mdev->bitmap) {
if(drbd_bm_init(mdev))
return ERR_NOMEM;
}
}
return rv;
}
int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
{
enum drbd_ret_code retcode;
struct drbd_tconn *tconn;
struct net_conf *new_conf = NULL;
struct net_conf *old_conf, *new_conf = NULL;
int err;
int ovr; /* online verify running */
int rsr; /* re-sync running */
@ -1735,17 +1758,20 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
goto out;
}
/* we also need a net config
* to change the options on */
if (!get_net_conf(tconn)) {
drbd_msg_put_info("net conf missing, try connect");
retcode = ERR_INVALID_REQUEST;
goto out;
}
conn_reconfig_start(tconn);
memcpy(new_conf, tconn->net_conf, sizeof(*new_conf));
rcu_read_lock();
old_conf = rcu_dereference(tconn->net_conf);
if (!old_conf) {
drbd_msg_put_info("net conf missing, try connect");
retcode = ERR_INVALID_REQUEST;
goto fail_rcu_unlock;
}
*new_conf = *old_conf;
rcu_read_unlock();
err = net_conf_from_attrs_for_change(new_conf, info);
if (err) {
retcode = ERR_MANDATORY_TAG;
@ -1759,10 +1785,13 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
/* re-sync running */
rsr = conn_resync_running(tconn);
if (rsr && strcmp(new_conf->csums_alg, tconn->net_conf->csums_alg)) {
rcu_read_lock();
old_conf = rcu_dereference(tconn->net_conf);
if (rsr && old_conf && strcmp(new_conf->csums_alg, old_conf->csums_alg)) {
retcode = ERR_CSUMS_RESYNC_RUNNING;
goto fail;
goto fail_rcu_unlock;
}
rcu_read_unlock();
if (!rsr && new_conf->csums_alg[0]) {
csums_tfm = crypto_alloc_hash(new_conf->csums_alg, 0, CRYPTO_ALG_ASYNC);
@ -1780,12 +1809,15 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
/* online verify running */
ovr = conn_ov_running(tconn);
if (ovr) {
if (strcmp(new_conf->verify_alg, tconn->net_conf->verify_alg)) {
rcu_read_lock();
old_conf = rcu_dereference(tconn->net_conf);
if (ovr && old_conf) {
if (strcmp(new_conf->verify_alg, old_conf->verify_alg)) {
retcode = ERR_VERIFY_RUNNING;
goto fail;
goto fail_rcu_unlock;
}
}
rcu_read_unlock();
if (!ovr && new_conf->verify_alg[0]) {
verify_tfm = crypto_alloc_hash(new_conf->verify_alg, 0, CRYPTO_ALG_ASYNC);
@ -1801,16 +1833,9 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
}
}
/* For now, use struct assignment, not pointer assignment.
* We don't have any means to determine who might still
* keep a local alias into the struct,
* so we cannot just free it and hope for the best :(
* FIXME
* To avoid someone looking at a half-updated struct, we probably
* should have a rw-semaphor on net_conf and disk_conf.
*/
*tconn->net_conf = *new_conf;
rcu_assign_pointer(tconn->net_conf, new_conf);
synchronize_rcu();
kfree(old_conf);
if (!rsr) {
crypto_free_hash(tconn->csums_tfm);
@ -1826,11 +1851,12 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
if (tconn->cstate >= C_WF_REPORT_PARAMS)
drbd_send_sync_param(minor_to_mdev(conn_lowest_minor(tconn)));
fail_rcu_unlock:
rcu_read_unlock();
fail:
crypto_free_hash(csums_tfm);
crypto_free_hash(verify_tfm);
kfree(new_conf);
put_net_conf(tconn);
conn_reconfig_done(tconn);
out:
drbd_adm_finish(info, retcode);
@ -1841,7 +1867,7 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
{
char hmac_name[CRYPTO_MAX_ALG_NAME];
struct drbd_conf *mdev;
struct net_conf *new_conf = NULL;
struct net_conf *old_conf, *new_conf = NULL;
struct crypto_hash *tfm = NULL;
struct crypto_hash *integrity_w_tfm = NULL;
struct crypto_hash *integrity_r_tfm = NULL;
@ -1929,23 +1955,26 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
* strictly serialized on genl_lock(). We are protected against
* concurrent reconfiguration/addition/deletion */
list_for_each_entry(oconn, &drbd_tconns, all_tconn) {
struct net_conf *nc;
if (oconn == tconn)
continue;
if (get_net_conf(oconn)) {
taken_addr = (struct sockaddr *)&oconn->net_conf->my_addr;
if (new_conf->my_addr_len == oconn->net_conf->my_addr_len &&
rcu_read_lock();
nc = rcu_dereference(oconn->net_conf);
if (nc) {
taken_addr = (struct sockaddr *)&nc->my_addr;
if (new_conf->my_addr_len == nc->my_addr_len &&
!memcmp(new_my_addr, taken_addr, new_conf->my_addr_len))
retcode = ERR_LOCAL_ADDR;
taken_addr = (struct sockaddr *)&oconn->net_conf->peer_addr;
if (new_conf->peer_addr_len == oconn->net_conf->peer_addr_len &&
taken_addr = (struct sockaddr *)&nc->peer_addr;
if (new_conf->peer_addr_len == nc->peer_addr_len &&
!memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len))
retcode = ERR_PEER_ADDR;
put_net_conf(oconn);
if (retcode != NO_ERROR)
goto fail;
}
rcu_read_unlock();
if (retcode != NO_ERROR)
goto fail;
}
if (new_conf->cram_hmac_alg[0] != 0) {
@ -2004,12 +2033,15 @@ int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info)
conn_flush_workqueue(tconn);
spin_lock_irq(&tconn->req_lock);
if (tconn->net_conf != NULL) {
rcu_read_lock();
old_conf = rcu_dereference(tconn->net_conf);
if (old_conf != NULL) {
retcode = ERR_NET_CONFIGURED;
rcu_read_unlock();
spin_unlock_irq(&tconn->req_lock);
goto fail;
}
tconn->net_conf = new_conf;
rcu_assign_pointer(tconn->net_conf, new_conf);
crypto_free_hash(tconn->cram_hmac_tfm);
tconn->cram_hmac_tfm = tfm;
@ -2464,9 +2496,9 @@ int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev,
const struct sib_info *sib)
{
struct state_info *si = NULL; /* for sizeof(si->member); */
struct net_conf *nc;
struct nlattr *nla;
int got_ldev;
int got_net;
int err = 0;
int exclude_sensitive;
@ -2484,7 +2516,6 @@ int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev,
exclude_sensitive = sib || !capable(CAP_SYS_ADMIN);
got_ldev = get_ldev(mdev);
got_net = get_net_conf(mdev->tconn);
/* We need to add connection name and volume number information still.
* Minor number is in drbd_genlmsghdr. */
@ -2497,9 +2528,14 @@ int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev,
if (got_ldev)
if (disk_conf_to_skb(skb, &mdev->ldev->dc, exclude_sensitive))
goto nla_put_failure;
if (got_net)
if (net_conf_to_skb(skb, mdev->tconn->net_conf, exclude_sensitive))
goto nla_put_failure;
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
if (nc)
err = net_conf_to_skb(skb, nc, exclude_sensitive);
rcu_read_unlock();
if (err)
goto nla_put_failure;
nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO);
if (!nla)
@ -2546,8 +2582,6 @@ nla_put_failure:
err = -EMSGSIZE;
if (got_ldev)
put_ldev(mdev);
if (got_net)
put_net_conf(mdev->tconn);
return err;
}

9
drivers/block/drbd/drbd_proc.c
View File

@ -197,6 +197,8 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
int i, prev_i = -1;
const char *sn;
struct drbd_conf *mdev;
struct net_conf *nc;
char wp;
static char write_ordering_chars[] = {
[WO_none] = 'n',
@ -240,6 +242,10 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
mdev->state.role == R_SECONDARY) {
seq_printf(seq, "%2d: cs:Unconfigured\n", i);
} else {
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
wp = nc ? nc->wire_protocol - DRBD_PROT_A + 'A' : ' ';
rcu_read_unlock();
seq_printf(seq,
"%2d: cs:%s ro:%s/%s ds:%s/%s %c %c%c%c%c%c%c\n"
" ns:%u nr:%u dw:%u dr:%u al:%u bm:%u "
@ -249,8 +255,7 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
drbd_role_str(mdev->state.peer),
drbd_disk_str(mdev->state.disk),
drbd_disk_str(mdev->state.pdsk),
(mdev->tconn->net_conf == NULL ? ' ' :
(mdev->tconn->net_conf->wire_protocol - DRBD_PROT_A+'A')),
wp,
drbd_suspended(mdev) ? 's' : 'r',
mdev->state.aftr_isp ? 'a' : '-',
mdev->state.peer_isp ? 'p' : '-',

247
drivers/block/drbd/drbd_receiver.c
View File

@ -244,11 +244,18 @@ struct page *drbd_alloc_pages(struct drbd_conf *mdev, unsigned int number,
bool retry)
{
struct page *page = NULL;
struct net_conf *nc;
DEFINE_WAIT(wait);
int mxb;
/* Yes, we may run up to @number over max_buffers. If we
* follow it strictly, the admin will get it wrong anyways. */
if (atomic_read(&mdev->pp_in_use) < mdev->tconn->net_conf->max_buffers)
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
mxb = nc ? nc->max_buffers : 1000000;
rcu_read_unlock();
if (atomic_read(&mdev->pp_in_use) < mxb)
page = __drbd_alloc_pages(mdev, number);
while (page == NULL) {
@ -256,7 +263,7 @@ struct page *drbd_alloc_pages(struct drbd_conf *mdev, unsigned int number,
drbd_kick_lo_and_reclaim_net(mdev);
if (atomic_read(&mdev->pp_in_use) < mdev->tconn->net_conf->max_buffers) {
if (atomic_read(&mdev->pp_in_use) < mxb) {
page = __drbd_alloc_pages(mdev, number);
if (page)
break;
@ -607,24 +614,47 @@ static struct socket *drbd_try_connect(struct drbd_tconn *tconn)
const char *what;
struct socket *sock;
struct sockaddr_in6 src_in6;
int err;
struct sockaddr_in6 peer_in6;
struct net_conf *nc;
int err, peer_addr_len, my_addr_len;
int sndbuf_size, rcvbuf_size, try_connect_int;
int disconnect_on_error = 1;
if (!get_net_conf(tconn))
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
if (!nc) {
rcu_read_unlock();
return NULL;
}
sndbuf_size = nc->sndbuf_size;
rcvbuf_size = nc->rcvbuf_size;
try_connect_int = nc->try_connect_int;
my_addr_len = min_t(int, nc->my_addr_len, sizeof(src_in6));
memcpy(&src_in6, nc->my_addr, my_addr_len);
if (((struct sockaddr *)nc->my_addr)->sa_family == AF_INET6)
src_in6.sin6_port = 0;
else
((struct sockaddr_in *)&src_in6)->sin_port = 0; /* AF_INET & AF_SCI */
peer_addr_len = min_t(int, nc->peer_addr_len, sizeof(src_in6));
memcpy(&peer_in6, nc->peer_addr, peer_addr_len);
rcu_read_unlock();
what = "sock_create_kern";
err = sock_create_kern(((struct sockaddr *)tconn->net_conf->my_addr)->sa_family,
SOCK_STREAM, IPPROTO_TCP, &sock);
err = sock_create_kern(((struct sockaddr *)&src_in6)->sa_family,
SOCK_STREAM, IPPROTO_TCP, &sock);
if (err < 0) {
sock = NULL;
goto out;
}
sock->sk->sk_rcvtimeo =
sock->sk->sk_sndtimeo = tconn->net_conf->try_connect_int*HZ;
drbd_setbufsize(sock, tconn->net_conf->sndbuf_size,
tconn->net_conf->rcvbuf_size);
sock->sk->sk_sndtimeo = try_connect_int * HZ;
drbd_setbufsize(sock, sndbuf_size, rcvbuf_size);
/* explicitly bind to the configured IP as source IP
* for the outgoing connections.
@ -633,17 +663,8 @@ static struct socket *drbd_try_connect(struct drbd_tconn *tconn)
* Make sure to use 0 as port number, so linux selects
* a free one dynamically.
*/
memcpy(&src_in6, tconn->net_conf->my_addr,
min_t(int, tconn->net_conf->my_addr_len, sizeof(src_in6)));
if (((struct sockaddr *)tconn->net_conf->my_addr)->sa_family == AF_INET6)
src_in6.sin6_port = 0;
else
((struct sockaddr_in *)&src_in6)->sin_port = 0; /* AF_INET & AF_SCI */
what = "bind before connect";
err = sock->ops->bind(sock,
(struct sockaddr *) &src_in6,
tconn->net_conf->my_addr_len);
err = sock->ops->bind(sock, (struct sockaddr *) &src_in6, my_addr_len);
if (err < 0)
goto out;
@ -651,9 +672,7 @@ static struct socket *drbd_try_connect(struct drbd_tconn *tconn)
* stay C_WF_CONNECTION, don't go Disconnecting! */
disconnect_on_error = 0;
what = "connect";
err = sock->ops->connect(sock,
(struct sockaddr *)tconn->net_conf->peer_addr,
tconn->net_conf->peer_addr_len, 0);
err = sock->ops->connect(sock, (struct sockaddr *) &peer_in6, peer_addr_len, 0);
out:
if (err < 0) {
@ -676,40 +695,52 @@ out:
if (disconnect_on_error)
conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
}
put_net_conf(tconn);
return sock;
}
static struct socket *drbd_wait_for_connect(struct drbd_tconn *tconn)
{
int timeo, err;
int timeo, err, my_addr_len;
int sndbuf_size, rcvbuf_size, try_connect_int;
struct socket *s_estab = NULL, *s_listen;
struct sockaddr_in6 my_addr;
struct net_conf *nc;
const char *what;
if (!get_net_conf(tconn))
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
if (!nc) {
rcu_read_unlock();
return NULL;
}
sndbuf_size = nc->sndbuf_size;
rcvbuf_size = nc->rcvbuf_size;
try_connect_int = nc->try_connect_int;
my_addr_len = min_t(int, nc->my_addr_len, sizeof(struct sockaddr_in6));
memcpy(&my_addr, nc->my_addr, my_addr_len);
rcu_read_unlock();
what = "sock_create_kern";
err = sock_create_kern(((struct sockaddr *)tconn->net_conf->my_addr)->sa_family,
err = sock_create_kern(((struct sockaddr *)&my_addr)->sa_family,
SOCK_STREAM, IPPROTO_TCP, &s_listen);
if (err) {
s_listen = NULL;
goto out;
}
timeo = tconn->net_conf->try_connect_int * HZ;
timeo = try_connect_int * HZ;
timeo += (random32() & 1) ? timeo / 7 : -timeo / 7; /* 28.5% random jitter */
s_listen->sk->sk_reuse = 1; /* SO_REUSEADDR */
s_listen->sk->sk_rcvtimeo = timeo;
s_listen->sk->sk_sndtimeo = timeo;
drbd_setbufsize(s_listen, tconn->net_conf->sndbuf_size,
tconn->net_conf->rcvbuf_size);
drbd_setbufsize(s_listen, sndbuf_size, rcvbuf_size);
what = "bind before listen";
err = s_listen->ops->bind(s_listen,
(struct sockaddr *) tconn->net_conf->my_addr,
tconn->net_conf->my_addr_len);
err = s_listen->ops->bind(s_listen, (struct sockaddr *)&my_addr, my_addr_len);
if (err < 0)
goto out;
@ -724,7 +755,6 @@ out:
conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
}
}
put_net_conf(tconn);
return s_estab;
}
@ -817,7 +847,8 @@ int drbd_connected(int vnr, void *p, void *data)
static int drbd_connect(struct drbd_tconn *tconn)
{
struct socket *sock, *msock;
int try, h, ok;
struct net_conf *nc;
int timeout, try, h, ok;
if (conn_request_state(tconn, NS(conn, C_WF_CONNECTION), CS_VERBOSE) < SS_SUCCESS)
return -2;
@ -924,11 +955,17 @@ retry:
* sock->sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
* first set it to the P_CONNECTION_FEATURES timeout,
* which we set to 4x the configured ping_timeout. */
sock->sk->sk_sndtimeo =
sock->sk->sk_rcvtimeo = tconn->net_conf->ping_timeo*4*HZ/10;
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
msock->sk->sk_sndtimeo = tconn->net_conf->timeout*HZ/10;
msock->sk->sk_rcvtimeo = tconn->net_conf->ping_int*HZ;
sock->sk->sk_sndtimeo =
sock->sk->sk_rcvtimeo = nc->ping_timeo*4*HZ/10;
msock->sk->sk_rcvtimeo = nc->ping_int*HZ;
timeout = nc->timeout * HZ / 10;
rcu_read_unlock();
msock->sk->sk_sndtimeo = timeout;
/* we don't want delays.
* we use TCP_CORK where appropriate, though */
@ -956,7 +993,7 @@ retry:
if (conn_request_state(tconn, NS(conn, C_WF_REPORT_PARAMS), CS_VERBOSE) < SS_SUCCESS)
return 0;
sock->sk->sk_sndtimeo = tconn->net_conf->timeout*HZ/10;
sock->sk->sk_sndtimeo = timeout;
sock->sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
drbd_thread_start(&tconn->asender);
@ -1842,7 +1879,9 @@ static int wait_for_and_update_peer_seq(struct drbd_conf *mdev, const u32 peer_s
}
prepare_to_wait(&mdev->seq_wait, &wait, TASK_INTERRUPTIBLE);
spin_unlock(&mdev->peer_seq_lock);
timeout = mdev->tconn->net_conf->ping_timeo*HZ/10;
rcu_read_lock();
timeout = rcu_dereference(mdev->tconn->net_conf)->ping_timeo*HZ/10;
rcu_read_unlock();
timeout = schedule_timeout(timeout);
spin_lock(&mdev->peer_seq_lock);
if (!timeout) {
@ -2075,7 +2114,8 @@ static int receive_Data(struct drbd_tconn *tconn, struct packet_info *pi)
spin_unlock_irq(&mdev->tconn->req_lock);
if (mdev->tconn->agreed_pro_version < 100) {
switch (mdev->tconn->net_conf->wire_protocol) {
rcu_read_lock();
switch (rcu_dereference(mdev->tconn->net_conf)->wire_protocol) {
case DRBD_PROT_C:
dp_flags |= DP_SEND_WRITE_ACK;
break;
@ -2083,6 +2123,7 @@ static int receive_Data(struct drbd_tconn *tconn, struct packet_info *pi)
dp_flags |= DP_SEND_RECEIVE_ACK;
break;
}
rcu_read_unlock();
}
if (dp_flags & DP_SEND_WRITE_ACK) {
@ -2385,6 +2426,7 @@ static int drbd_asb_recover_0p(struct drbd_conf *mdev) __must_hold(local)
{
int self, peer, rv = -100;
unsigned long ch_self, ch_peer;
enum drbd_after_sb_p after_sb_0p;
self = mdev->ldev->md.uuid[UI_BITMAP] & 1;
peer = mdev->p_uuid[UI_BITMAP] & 1;
@ -2392,10 +2434,14 @@ static int drbd_asb_recover_0p(struct drbd_conf *mdev) __must_hold(local)
ch_peer = mdev->p_uuid[UI_SIZE];
ch_self = mdev->comm_bm_set;
switch (mdev->tconn->net_conf->after_sb_0p) {
rcu_read_lock();
after_sb_0p = rcu_dereference(mdev->tconn->net_conf)->after_sb_0p;
rcu_read_unlock();
switch (after_sb_0p) {
case ASB_CONSENSUS:
case ASB_DISCARD_SECONDARY:
case ASB_CALL_HELPER:
case ASB_VIOLENTLY:
dev_err(DEV, "Configuration error.\n");
break;
case ASB_DISCONNECT:
@ -2431,7 +2477,7 @@ static int drbd_asb_recover_0p(struct drbd_conf *mdev) __must_hold(local)
if (ch_peer == 0) { rv = 1; break; }
if (ch_self == 0) { rv = -1; break; }
}
if (mdev->tconn->net_conf->after_sb_0p == ASB_DISCARD_ZERO_CHG)
if (after_sb_0p == ASB_DISCARD_ZERO_CHG)
break;
case ASB_DISCARD_LEAST_CHG:
if (ch_self < ch_peer)
@ -2456,13 +2502,18 @@ static int drbd_asb_recover_0p(struct drbd_conf *mdev) __must_hold(local)
static int drbd_asb_recover_1p(struct drbd_conf *mdev) __must_hold(local)
{
int hg, rv = -100;
enum drbd_after_sb_p after_sb_1p;
switch (mdev->tconn->net_conf->after_sb_1p) {
rcu_read_lock();
after_sb_1p = rcu_dereference(mdev->tconn->net_conf)->after_sb_1p;
rcu_read_unlock();
switch (after_sb_1p) {
case ASB_DISCARD_YOUNGER_PRI:
case ASB_DISCARD_OLDER_PRI:
case ASB_DISCARD_LEAST_CHG:
case ASB_DISCARD_LOCAL:
case ASB_DISCARD_REMOTE:
case ASB_DISCARD_ZERO_CHG:
dev_err(DEV, "Configuration error.\n");
break;
case ASB_DISCONNECT:
@ -2505,8 +2556,12 @@ static int drbd_asb_recover_1p(struct drbd_conf *mdev) __must_hold(local)
static int drbd_asb_recover_2p(struct drbd_conf *mdev) __must_hold(local)
{
int hg, rv = -100;
enum drbd_after_sb_p after_sb_2p;
switch (mdev->tconn->net_conf->after_sb_2p) {
rcu_read_lock();
after_sb_2p = rcu_dereference(mdev->tconn->net_conf)->after_sb_2p;
rcu_read_unlock();
switch (after_sb_2p) {
case ASB_DISCARD_YOUNGER_PRI:
case ASB_DISCARD_OLDER_PRI:
case ASB_DISCARD_LEAST_CHG:
@ -2514,6 +2569,7 @@ static int drbd_asb_recover_2p(struct drbd_conf *mdev) __must_hold(local)
case ASB_DISCARD_REMOTE:
case ASB_CONSENSUS:
case ASB_DISCARD_SECONDARY:
case ASB_DISCARD_ZERO_CHG:
dev_err(DEV, "Configuration error.\n");
break;
case ASB_VIOLENTLY:
@ -2758,9 +2814,10 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_role peer_role,
enum drbd_disk_state peer_disk) __must_hold(local)
{
int hg, rule_nr;
enum drbd_conns rv = C_MASK;
enum drbd_disk_state mydisk;
struct net_conf *nc;
int hg, rule_nr, rr_conflict, dry_run;
mydisk = mdev->state.disk;
if (mydisk == D_NEGOTIATING)
@ -2797,7 +2854,10 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_rol
if (abs(hg) == 100)
drbd_khelper(mdev, "initial-split-brain");
if (hg == 100 || (hg == -100 && mdev->tconn->net_conf->always_asbp)) {
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
if (hg == 100 || (hg == -100 && nc->always_asbp)) {
int pcount = (mdev->state.role == R_PRIMARY)
+ (peer_role == R_PRIMARY);
int forced = (hg == -100);
@ -2826,9 +2886,9 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_rol
}
if (hg == -100) {
if (mdev->tconn->net_conf->want_lose && !(mdev->p_uuid[UI_FLAGS]&1))
if (nc->want_lose && !(mdev->p_uuid[UI_FLAGS]&1))
hg = -1;
if (!mdev->tconn->net_conf->want_lose && (mdev->p_uuid[UI_FLAGS]&1))
if (!nc->want_lose && (mdev->p_uuid[UI_FLAGS]&1))
hg = 1;
if (abs(hg) < 100)
@ -2836,6 +2896,9 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_rol
"Sync from %s node\n",
(hg < 0) ? "peer" : "this");
}
rr_conflict = nc->rr_conflict;
dry_run = nc->dry_run;
rcu_read_unlock();
if (hg == -100) {
/* FIXME this log message is not correct if we end up here
@ -2854,7 +2917,7 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_rol
if (hg < 0 && /* by intention we do not use mydisk here. */
mdev->state.role == R_PRIMARY && mdev->state.disk >= D_CONSISTENT) {
switch (mdev->tconn->net_conf->rr_conflict) {
switch (rr_conflict) {
case ASB_CALL_HELPER:
drbd_khelper(mdev, "pri-lost");
/* fall through */
@ -2867,7 +2930,7 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_rol
}
}
if (mdev->tconn->net_conf->dry_run || test_bit(CONN_DRY_RUN, &mdev->tconn->flags)) {
if (dry_run || test_bit(CONN_DRY_RUN, &mdev->tconn->flags)) {
if (hg == 0)
dev_info(DEV, "dry-run connect: No resync, would become Connected immediately.\n");
else
@ -2926,6 +2989,8 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
int p_proto, p_after_sb_0p, p_after_sb_1p, p_after_sb_2p;
int p_want_lose, p_two_primaries, cf;
char p_integrity_alg[SHARED_SECRET_MAX] = "";
unsigned char *my_alg;
struct net_conf *nc;
p_proto = be32_to_cpu(p->protocol);
p_after_sb_0p = be32_to_cpu(p->after_sb_0p);
@ -2940,38 +3005,43 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
if (cf & CF_DRY_RUN)
set_bit(CONN_DRY_RUN, &tconn->flags);
if (p_proto != tconn->net_conf->wire_protocol && tconn->agreed_pro_version < 100) {
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
if (p_proto != nc->wire_protocol && tconn->agreed_pro_version < 100) {
conn_err(tconn, "incompatible communication protocols\n");
goto disconnect;
goto disconnect_rcu_unlock;
}
if (cmp_after_sb(p_after_sb_0p, tconn->net_conf->after_sb_0p)) {
if (cmp_after_sb(p_after_sb_0p, nc->after_sb_0p)) {
conn_err(tconn, "incompatible after-sb-0pri settings\n");
goto disconnect;
goto disconnect_rcu_unlock;
}
if (cmp_after_sb(p_after_sb_1p, tconn->net_conf->after_sb_1p)) {
if (cmp_after_sb(p_after_sb_1p, nc->after_sb_1p)) {
conn_err(tconn, "incompatible after-sb-1pri settings\n");
goto disconnect;
goto disconnect_rcu_unlock;
}
if (cmp_after_sb(p_after_sb_2p, tconn->net_conf->after_sb_2p)) {
if (cmp_after_sb(p_after_sb_2p, nc->after_sb_2p)) {
conn_err(tconn, "incompatible after-sb-2pri settings\n");
goto disconnect;
goto disconnect_rcu_unlock;
}
if (p_want_lose && tconn->net_conf->want_lose) {
if (p_want_lose && nc->want_lose) {
conn_err(tconn, "both sides have the 'want_lose' flag set\n");
goto disconnect;
goto disconnect_rcu_unlock;
}
if (p_two_primaries != tconn->net_conf->two_primaries) {
if (p_two_primaries != nc->two_primaries) {
conn_err(tconn, "incompatible setting of the two-primaries options\n");
goto disconnect;
goto disconnect_rcu_unlock;
}
my_alg = nc->integrity_alg;
rcu_read_unlock();
if (tconn->agreed_pro_version >= 87) {
unsigned char *my_alg = tconn->net_conf->integrity_alg;
int err;
err = drbd_recv_all(tconn, p_integrity_alg, pi->size);
@ -2989,6 +3059,8 @@ static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
return 0;
disconnect_rcu_unlock:
rcu_read_unlock();
disconnect:
conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
return -EIO;
@ -4322,19 +4394,26 @@ static int drbd_do_auth(struct drbd_tconn *tconn)
char *response = NULL;
char *right_response = NULL;
char *peers_ch = NULL;
unsigned int key_len = strlen(tconn->net_conf->shared_secret);
unsigned int key_len;
char secret[SHARED_SECRET_MAX]; /* 64 byte */
unsigned int resp_size;
struct hash_desc desc;
struct packet_info pi;
struct net_conf *nc;
int err, rv;
/* FIXME: Put the challenge/response into the preallocated socket buffer. */
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
key_len = strlen(nc->shared_secret);
memcpy(secret, nc->shared_secret, key_len);
rcu_read_unlock();
desc.tfm = tconn->cram_hmac_tfm;
desc.flags = 0;
rv = crypto_hash_setkey(tconn->cram_hmac_tfm,
(u8 *)tconn->net_conf->shared_secret, key_len);
rv = crypto_hash_setkey(tconn->cram_hmac_tfm, (u8 *)secret, key_len);
if (rv) {
conn_err(tconn, "crypto_hash_setkey() failed with %d\n", rv);
rv = -1;
@ -4456,8 +4535,8 @@ static int drbd_do_auth(struct drbd_tconn *tconn)
rv = !memcmp(response, right_response, resp_size);
if (rv)
conn_info(tconn, "Peer authenticated using %d bytes of '%s' HMAC\n",
resp_size, tconn->net_conf->cram_hmac_alg);
conn_info(tconn, "Peer authenticated using %d bytes HMAC\n",
resp_size);
else
rv = -1;
@ -4884,33 +4963,42 @@ int drbd_asender(struct drbd_thread *thi)
int received = 0;
unsigned int header_size = drbd_header_size(tconn);
int expect = header_size;
int ping_timeout_active = 0;
bool ping_timeout_active = false;
struct net_conf *nc;
int ping_timeo, no_cork, ping_int;
current->policy = SCHED_RR; /* Make this a realtime task! */
current->rt_priority = 2; /* more important than all other tasks */
while (get_t_state(thi) == RUNNING) {
drbd_thread_current_set_cpu(thi);
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
ping_timeo = nc->ping_timeo;
no_cork = nc->no_cork;
ping_int = nc->ping_int;
rcu_read_unlock();
if (test_and_clear_bit(SEND_PING, &tconn->flags)) {
if (drbd_send_ping(tconn)) {
conn_err(tconn, "drbd_send_ping has failed\n");
goto reconnect;
}
tconn->meta.socket->sk->sk_rcvtimeo =
tconn->net_conf->ping_timeo*HZ/10;
ping_timeout_active = 1;
tconn->meta.socket->sk->sk_rcvtimeo = ping_timeo * HZ / 10;
ping_timeout_active = true;
}
/* TODO: conditionally cork; it may hurt latency if we cork without
much to send */
if (!tconn->net_conf->no_cork)
if (!no_cork)
drbd_tcp_cork(tconn->meta.socket);
if (tconn_finish_peer_reqs(tconn)) {
conn_err(tconn, "tconn_finish_peer_reqs() failed\n");
goto reconnect;
}
/* but unconditionally uncork unless disabled */
if (!tconn->net_conf->no_cork)
if (!no_cork)
drbd_tcp_uncork(tconn->meta.socket);
/* short circuit, recv_msg would return EINTR anyways. */
@ -4984,10 +5072,11 @@ int drbd_asender(struct drbd_thread *thi)
tconn->last_received = jiffies;
/* the idle_timeout (ping-int)
* has been restored in got_PingAck() */
if (cmd == &asender_tbl[P_PING_ACK])
ping_timeout_active = 0;
if (cmd == &asender_tbl[P_PING_ACK]) {
/* restore idle timeout */
tconn->meta.socket->sk->sk_rcvtimeo = ping_int * HZ;
ping_timeout_active = false;
}
buf = tconn->meta.rbuf;
received = 0;

40
drivers/block/drbd/drbd_req.c
View File

@ -323,6 +323,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
struct bio_and_error *m)
{
struct drbd_conf *mdev = req->w.mdev;
struct net_conf *nc;
int p, rv = 0;
if (m)
@ -344,7 +345,10 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
* and from w_read_retry_remote */
D_ASSERT(!(req->rq_state & RQ_NET_MASK));
req->rq_state |= RQ_NET_PENDING;
p = mdev->tconn->net_conf->wire_protocol;
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
p = nc->wire_protocol;
rcu_read_unlock();
req->rq_state |=
p == DRBD_PROT_C ? RQ_EXP_WRITE_ACK :
p == DRBD_PROT_B ? RQ_EXP_RECEIVE_ACK : 0;
@ -474,7 +478,11 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
drbd_queue_work(&mdev->tconn->data.work, &req->w);
/* close the epoch, in case it outgrew the limit */
if (mdev->tconn->newest_tle->n_writes >= mdev->tconn->net_conf->max_epoch_size)
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
p = nc->max_epoch_size;
rcu_read_unlock();
if (mdev->tconn->newest_tle->n_writes >= p)
queue_barrier(mdev);
break;
@ -729,6 +737,7 @@ int __drbd_make_request(struct drbd_conf *mdev, struct bio *bio, unsigned long s
const sector_t sector = bio->bi_sector;
struct drbd_tl_epoch *b = NULL;
struct drbd_request *req;
struct net_conf *nc;
int local, remote, send_oos = 0;
int err;
int ret = 0;
@ -935,17 +944,19 @@ allocate_barrier:
if (send_oos && drbd_set_out_of_sync(mdev, sector, size))
_req_mod(req, QUEUE_FOR_SEND_OOS);
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
if (remote &&
mdev->tconn->net_conf->on_congestion != OC_BLOCK && mdev->tconn->agreed_pro_version >= 96) {
nc->on_congestion != OC_BLOCK && mdev->tconn->agreed_pro_version >= 96) {
int congested = 0;
if (mdev->tconn->net_conf->cong_fill &&
atomic_read(&mdev->ap_in_flight) >= mdev->tconn->net_conf->cong_fill) {
if (nc->cong_fill &&
atomic_read(&mdev->ap_in_flight) >= nc->cong_fill) {
dev_info(DEV, "Congestion-fill threshold reached\n");
congested = 1;
}
if (mdev->act_log->used >= mdev->tconn->net_conf->cong_extents) {
if (mdev->act_log->used >= nc->cong_extents) {
dev_info(DEV, "Congestion-extents threshold reached\n");
congested = 1;
}
@ -953,12 +964,13 @@ allocate_barrier:
if (congested) {
queue_barrier(mdev); /* last barrier, after mirrored writes */
if (mdev->tconn->net_conf->on_congestion == OC_PULL_AHEAD)
if (nc->on_congestion == OC_PULL_AHEAD)
_drbd_set_state(_NS(mdev, conn, C_AHEAD), 0, NULL);
else /*mdev->tconn->net_conf->on_congestion == OC_DISCONNECT */
else /*nc->on_congestion == OC_DISCONNECT */
_drbd_set_state(_NS(mdev, conn, C_DISCONNECTING), 0, NULL);
}
}
rcu_read_unlock();
spin_unlock_irq(&mdev->tconn->req_lock);
kfree(b); /* if someone else has beaten us to it... */
@ -1058,12 +1070,14 @@ void request_timer_fn(unsigned long data)
struct drbd_tconn *tconn = mdev->tconn;
struct drbd_request *req; /* oldest request */
struct list_head *le;
unsigned long et = 0; /* effective timeout = ko_count * timeout */
struct net_conf *nc;
unsigned long et; /* effective timeout = ko_count * timeout */
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
et = nc ? nc->timeout * HZ/10 * nc->ko_count : 0;
rcu_read_unlock();
if (get_net_conf(tconn)) {
et = tconn->net_conf->timeout*HZ/10 * tconn->net_conf->ko_count;
put_net_conf(tconn);
}
if (!et || mdev->state.conn < C_WF_REPORT_PARAMS)
return; /* Recurring timer stopped */

14
drivers/block/drbd/drbd_state.c
View File

@ -482,6 +482,7 @@ is_valid_state(struct drbd_conf *mdev, union drbd_state ns)
enum drbd_fencing_p fp;
enum drbd_state_rv rv = SS_SUCCESS;
struct net_conf *nc;
fp = FP_DONT_CARE;
if (get_ldev(mdev)) {
@ -489,14 +490,15 @@ is_valid_state(struct drbd_conf *mdev, union drbd_state ns)
put_ldev(mdev);
}
if (get_net_conf(mdev->tconn)) {
if (!mdev->tconn->net_conf->two_primaries && ns.role == R_PRIMARY) {
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
if (nc) {
if (!nc->two_primaries && ns.role == R_PRIMARY) {
if (ns.peer == R_PRIMARY)
rv = SS_TWO_PRIMARIES;
else if (conn_highest_peer(mdev->tconn) == R_PRIMARY)
rv = SS_O_VOL_PEER_PRI;
}
put_net_conf(mdev->tconn);
}
}
if (rv <= 0)
@ -531,7 +533,7 @@ is_valid_state(struct drbd_conf *mdev, union drbd_state ns)
rv = SS_CONNECTED_OUTDATES;
else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) &&
(mdev->tconn->net_conf->verify_alg[0] == 0))
(nc->verify_alg[0] == 0))
rv = SS_NO_VERIFY_ALG;
else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) &&
@ -541,6 +543,8 @@ is_valid_state(struct drbd_conf *mdev, union drbd_state ns)
else if (ns.conn >= C_CONNECTED && ns.pdsk == D_UNKNOWN)
rv = SS_CONNECTED_OUTDATES;
rcu_read_unlock();
return rv;
}

26
drivers/block/drbd/drbd_worker.c
View File

@ -1619,10 +1619,16 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
* detect connection loss, then waiting for a ping
* response (implicit in drbd_resync_finished) reduces
* the race considerably, but does not solve it. */
if (side == C_SYNC_SOURCE)
schedule_timeout_interruptible(
mdev->tconn->net_conf->ping_int * HZ +
mdev->tconn->net_conf->ping_timeo*HZ/9);
if (side == C_SYNC_SOURCE) {
struct net_conf *nc;
int timeo;
rcu_read_lock();
nc = rcu_dereference(mdev->tconn->net_conf);
timeo = nc->ping_int * HZ + nc->ping_timeo * HZ / 9;
rcu_read_unlock();
schedule_timeout_interruptible(timeo);
}
drbd_resync_finished(mdev);
}
@ -1645,22 +1651,30 @@ int drbd_worker(struct drbd_thread *thi)
struct drbd_tconn *tconn = thi->tconn;
struct drbd_work *w = NULL;
struct drbd_conf *mdev;
struct net_conf *nc;
LIST_HEAD(work_list);
int vnr, intr = 0;
int cork;
while (get_t_state(thi) == RUNNING) {
drbd_thread_current_set_cpu(thi);
if (down_trylock(&tconn->data.work.s)) {
mutex_lock(&tconn->data.mutex);
if (tconn->data.socket && !tconn->net_conf->no_cork)
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
cork = nc ? !nc->no_cork : 0;
rcu_read_unlock();
if (tconn->data.socket && cork)
drbd_tcp_uncork(tconn->data.socket);
mutex_unlock(&tconn->data.mutex);
intr = down_interruptible(&tconn->data.work.s);
mutex_lock(&tconn->data.mutex);
if (tconn->data.socket && !tconn->net_conf->no_cork)
if (tconn->data.socket && cork)
drbd_tcp_cork(tconn->data.socket);
mutex_unlock(&tconn->data.mutex);
}