[PATCH 1/2 v3] nbd: rename the runtime flags as NBD_RT_ prefixed

xiubli
2019-08-22T07:59:43Z

From: Xiubo Li <xiubli@redhat.com>

Preparing for the destory when disconnecting crash fixing.

Signed-off-by: Xiubo Li <xiubli@redhat.com>
---
drivers/block/nbd.c | 74 ++++++++++++++++++++++-----------------------
1 file changed, 37 insertions(+), 37 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index e21d2ded732b..8c2f17b99224 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -71,14 +71,14 @@ struct link_dead_args {
int index;
};

-#define NBD_TIMEDOUT 0
-#define NBD_DISCONNECT_REQUESTED 1
-#define NBD_DISCONNECTED 2
-#define NBD_HAS_PID_FILE 3
-#define NBD_HAS_CONFIG_REF 4
-#define NBD_BOUND 5
-#define NBD_DESTROY_ON_DISCONNECT 6
-#define NBD_DISCONNECT_ON_CLOSE 7
+#define NBD_RT_TIMEDOUT 0
+#define NBD_RT_DISCONNECT_REQUESTED 1
+#define NBD_RT_DISCONNECTED 2
+#define NBD_RT_HAS_PID_FILE 3
+#define NBD_RT_HAS_CONFIG_REF 4
+#define NBD_RT_BOUND 5
+#define NBD_RT_DESTROY_ON_DISCONNECT 6
+#define NBD_RT_DISCONNECT_ON_CLOSE 7

struct nbd_config {
u32 flags;
@@ -237,8 +237,8 @@ static void nbd_put(struct nbd_device *nbd)

static int nbd_disconnected(struct nbd_config *config)
{
- return test_bit(NBD_DISCONNECTED, &config->runtime_flags) ||
- test_bit(NBD_DISCONNECT_REQUESTED, &config->runtime_flags);
+ return test_bit(NBD_RT_DISCONNECTED, &config->runtime_flags) ||
+ test_bit(NBD_RT_DISCONNECT_REQUESTED, &config->runtime_flags);
}

static void nbd_mark_nsock_dead(struct nbd_device *nbd, struct nbd_sock *nsock,
@@ -256,9 +256,9 @@ static void nbd_mark_nsock_dead(struct nbd_device *nbd, struct nbd_sock *nsock,
if (!nsock->dead) {
kernel_sock_shutdown(nsock->sock, SHUT_RDWR);
if (atomic_dec_return(&nbd->config->live_connections) == 0) {
- if (test_and_clear_bit(NBD_DISCONNECT_REQUESTED,
+ if (test_and_clear_bit(NBD_RT_DISCONNECT_REQUESTED,
&nbd->config->runtime_flags)) {
- set_bit(NBD_DISCONNECTED,
+ set_bit(NBD_RT_DISCONNECTED,
&nbd->config->runtime_flags);
dev_info(nbd_to_dev(nbd),
"Disconnected due to user request.\n");
@@ -332,7 +332,7 @@ static void sock_shutdown(struct nbd_device *nbd)

if (config->num_connections == 0)
return;
- if (test_and_set_bit(NBD_DISCONNECTED, &config->runtime_flags))
+ if (test_and_set_bit(NBD_RT_DISCONNECTED, &config->runtime_flags))
return;

for (i = 0; i < config->num_connections; i++) {
@@ -393,7 +393,7 @@ static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req,
dev_err_ratelimited(nbd_to_dev(nbd),
"Connection timed out\n");
}
- set_bit(NBD_TIMEDOUT, &config->runtime_flags);
+ set_bit(NBD_RT_TIMEDOUT, &config->runtime_flags);
cmd->status = BLK_STS_IOERR;
mutex_unlock(&cmd->lock);
sock_shutdown(nbd);
@@ -773,7 +773,7 @@ static int find_fallback(struct nbd_device *nbd, int index)
struct nbd_sock *nsock = config->socks[index];
int fallback = nsock->fallback_index;

- if (test_bit(NBD_DISCONNECTED, &config->runtime_flags))
+ if (test_bit(NBD_RT_DISCONNECTED, &config->runtime_flags))
return new_index;

if (config->num_connections <= 1) {
@@ -814,7 +814,7 @@ static int wait_for_reconnect(struct nbd_device *nbd)
struct nbd_config *config = nbd->config;
if (!config->dead_conn_timeout)
return 0;
- if (test_bit(NBD_DISCONNECTED, &config->runtime_flags))
+ if (test_bit(NBD_RT_DISCONNECTED, &config->runtime_flags))
return 0;
return wait_event_timeout(config->conn_wait,
atomic_read(&config->live_connections) > 0,
@@ -947,12 +947,12 @@ static int nbd_add_socket(struct nbd_device *nbd, unsigned long arg,
return err;

if (!netlink && !nbd->task_setup &&
- !test_bit(NBD_BOUND, &config->runtime_flags))
+ !test_bit(NBD_RT_BOUND, &config->runtime_flags))
nbd->task_setup = current;

if (!netlink &&
(nbd->task_setup != current ||
- test_bit(NBD_BOUND, &config->runtime_flags))) {
+ test_bit(NBD_RT_BOUND, &config->runtime_flags))) {
dev_err(disk_to_dev(nbd->disk),
"Device being setup by another task");
sockfd_put(sock);
@@ -1031,7 +1031,7 @@ static int nbd_reconnect_socket(struct nbd_device *nbd, unsigned long arg)
mutex_unlock(&nsock->tx_lock);
sockfd_put(old);

- clear_bit(NBD_DISCONNECTED, &config->runtime_flags);
+ clear_bit(NBD_RT_DISCONNECTED, &config->runtime_flags);

/* We take the tx_mutex in an error path in the recv_work, so we
* need to queue_work outside of the tx_mutex.
@@ -1102,7 +1102,7 @@ static int nbd_disconnect(struct nbd_device *nbd)
struct nbd_config *config = nbd->config;

dev_info(disk_to_dev(nbd->disk), "NBD_DISCONNECT\n");
- set_bit(NBD_DISCONNECT_REQUESTED, &config->runtime_flags);
+ set_bit(NBD_RT_DISCONNECT_REQUESTED, &config->runtime_flags);
send_disconnects(nbd);
return 0;
}
@@ -1121,7 +1121,7 @@ static void nbd_config_put(struct nbd_device *nbd)
struct nbd_config *config = nbd->config;
nbd_dev_dbg_close(nbd);
nbd_size_clear(nbd);
- if (test_and_clear_bit(NBD_HAS_PID_FILE,
+ if (test_and_clear_bit(NBD_RT_HAS_PID_FILE,
&config->runtime_flags))
device_remove_file(disk_to_dev(nbd->disk), &pid_attr);
nbd->task_recv = NULL;
@@ -1175,7 +1175,7 @@ static int nbd_start_device(struct nbd_device *nbd)
dev_err(disk_to_dev(nbd->disk), "device_create_file failed!\n");
return error;
}
- set_bit(NBD_HAS_PID_FILE, &config->runtime_flags);
+ set_bit(NBD_RT_HAS_PID_FILE, &config->runtime_flags);

nbd_dev_dbg_init(nbd);
for (i = 0; i < num_connections; i++) {
@@ -1220,9 +1220,9 @@ static int nbd_start_device_ioctl(struct nbd_device *nbd, struct block_device *b
mutex_lock(&nbd->config_lock);
nbd_bdev_reset(bdev);
/* user requested, ignore socket errors */
- if (test_bit(NBD_DISCONNECT_REQUESTED, &config->runtime_flags))
+ if (test_bit(NBD_RT_DISCONNECT_REQUESTED, &config->runtime_flags))
ret = 0;
- if (test_bit(NBD_TIMEDOUT, &config->runtime_flags))
+ if (test_bit(NBD_RT_TIMEDOUT, &config->runtime_flags))
ret = -ETIMEDOUT;
return ret;
}
@@ -1233,7 +1233,7 @@ static void nbd_clear_sock_ioctl(struct nbd_device *nbd,
sock_shutdown(nbd);
__invalidate_device(bdev, true);
nbd_bdev_reset(bdev);
- if (test_and_clear_bit(NBD_HAS_CONFIG_REF,
+ if (test_and_clear_bit(NBD_RT_HAS_CONFIG_REF,
&nbd->config->runtime_flags))
nbd_config_put(nbd);
}
@@ -1324,7 +1324,7 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
/* Don't allow ioctl operations on a nbd device that was created with
* netlink, unless it's DISCONNECT or CLEAR_SOCK, which are fine.
*/
- if (!test_bit(NBD_BOUND, &config->runtime_flags) ||
+ if (!test_bit(NBD_RT_BOUND, &config->runtime_flags) ||
(cmd == NBD_DISCONNECT || cmd == NBD_CLEAR_SOCK))
error = __nbd_ioctl(bdev, nbd, cmd, arg);
else
@@ -1395,7 +1395,7 @@ static void nbd_release(struct gendisk *disk, fmode_t mode)
struct nbd_device *nbd = disk->private_data;
struct block_device *bdev = bdget_disk(disk, 0);

- if (test_bit(NBD_DISCONNECT_ON_CLOSE, &nbd->config->runtime_flags) &&
+ if (test_bit(NBD_RT_DISCONNECT_ON_CLOSE, &nbd->config->runtime_flags) &&
bdev->bd_openers == 0)
nbd_disconnect_and_put(nbd);

@@ -1793,7 +1793,7 @@ static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
return -ENOMEM;
}
refcount_set(&nbd->config_refs, 1);
- set_bit(NBD_BOUND, &config->runtime_flags);
+ set_bit(NBD_RT_BOUND, &config->runtime_flags);

ret = nbd_genl_size_set(info, nbd);
if (ret)
@@ -1815,12 +1815,12 @@ static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NBD_ATTR_CLIENT_FLAGS]) {
u64 flags = nla_get_u64(info->attrs[NBD_ATTR_CLIENT_FLAGS]);
if (flags & NBD_CFLAG_DESTROY_ON_DISCONNECT) {
- set_bit(NBD_DESTROY_ON_DISCONNECT,
+ set_bit(NBD_RT_DESTROY_ON_DISCONNECT,
&config->runtime_flags);
put_dev = true;
}
if (flags & NBD_CFLAG_DISCONNECT_ON_CLOSE) {
- set_bit(NBD_DISCONNECT_ON_CLOSE,
+ set_bit(NBD_RT_DISCONNECT_ON_CLOSE,
&config->runtime_flags);
}
}
@@ -1859,7 +1859,7 @@ static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
out:
mutex_unlock(&nbd->config_lock);
if (!ret) {
- set_bit(NBD_HAS_CONFIG_REF, &config->runtime_flags);
+ set_bit(NBD_RT_HAS_CONFIG_REF, &config->runtime_flags);
refcount_inc(&nbd->config_refs);
nbd_connect_reply(info, nbd->index);
}
@@ -1875,7 +1875,7 @@ static void nbd_disconnect_and_put(struct nbd_device *nbd)
nbd_disconnect(nbd);
nbd_clear_sock(nbd);
mutex_unlock(&nbd->config_lock);
- if (test_and_clear_bit(NBD_HAS_CONFIG_REF,
+ if (test_and_clear_bit(NBD_RT_HAS_CONFIG_REF,
&nbd->config->runtime_flags))
nbd_config_put(nbd);
}
@@ -1959,7 +1959,7 @@ static int nbd_genl_reconfigure(struct sk_buff *skb, struct genl_info *info)

mutex_lock(&nbd->config_lock);
config = nbd->config;
- if (!test_bit(NBD_BOUND, &config->runtime_flags) ||
+ if (!test_bit(NBD_RT_BOUND, &config->runtime_flags) ||
!nbd->task_recv) {
dev_err(nbd_to_dev(nbd),
"not configured, cannot reconfigure\n");
@@ -1984,20 +1984,20 @@ static int nbd_genl_reconfigure(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NBD_ATTR_CLIENT_FLAGS]) {
u64 flags = nla_get_u64(info->attrs[NBD_ATTR_CLIENT_FLAGS]);
if (flags & NBD_CFLAG_DESTROY_ON_DISCONNECT) {
- if (!test_and_set_bit(NBD_DESTROY_ON_DISCONNECT,
+ if (!test_and_set_bit(NBD_RT_DESTROY_ON_DISCONNECT,
&config->runtime_flags))
put_dev = true;
} else {
- if (test_and_clear_bit(NBD_DESTROY_ON_DISCONNECT,
+ if (test_and_clear_bit(NBD_RT_DESTROY_ON_DISCONNECT,
&config->runtime_flags))
refcount_inc(&nbd->refs);
}

if (flags & NBD_CFLAG_DISCONNECT_ON_CLOSE) {
- set_bit(NBD_DISCONNECT_ON_CLOSE,
+ set_bit(NBD_RT_DISCONNECT_ON_CLOSE,
&config->runtime_flags);
} else {
- clear_bit(NBD_DISCONNECT_ON_CLOSE,
+ clear_bit(NBD_RT_DISCONNECT_ON_CLOSE,
&config->runtime_flags);
}
}
--
2.21.0