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-rw-r--r--drivers/block/nbd.c92
1 files changed, 37 insertions, 55 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 99a0dd58602e..d5828b9dbfef 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -120,11 +120,6 @@ static inline struct device *nbd_to_dev(struct nbd_device *nbd)
return disk_to_dev(nbd->disk);
}
-static bool nbd_is_connected(struct nbd_device *nbd)
-{
- return !!nbd->task_recv;
-}
-
static const char *nbdcmd_to_ascii(int cmd)
{
switch (cmd) {
@@ -160,36 +155,30 @@ static void nbd_mark_nsock_dead(struct nbd_sock *nsock)
nsock->sent = 0;
}
-static int nbd_size_clear(struct nbd_device *nbd, struct block_device *bdev)
+static void nbd_size_clear(struct nbd_device *nbd)
{
if (nbd->config->bytesize) {
- if (bdev->bd_openers <= 1)
- bd_set_size(bdev, 0);
set_capacity(nbd->disk, 0);
kobject_uevent(&nbd_to_dev(nbd)->kobj, KOBJ_CHANGE);
}
-
- return 0;
}
-static void nbd_size_update(struct nbd_device *nbd, struct block_device *bdev)
+static void nbd_size_update(struct nbd_device *nbd)
{
struct nbd_config *config = nbd->config;
blk_queue_logical_block_size(nbd->disk->queue, config->blksize);
blk_queue_physical_block_size(nbd->disk->queue, config->blksize);
- bd_set_size(bdev, config->bytesize);
set_capacity(nbd->disk, config->bytesize >> 9);
kobject_uevent(&nbd_to_dev(nbd)->kobj, KOBJ_CHANGE);
}
-static void nbd_size_set(struct nbd_device *nbd, struct block_device *bdev,
- loff_t blocksize, loff_t nr_blocks)
+static void nbd_size_set(struct nbd_device *nbd, loff_t blocksize,
+ loff_t nr_blocks)
{
struct nbd_config *config = nbd->config;
config->blksize = blocksize;
config->bytesize = blocksize * nr_blocks;
- if (nbd_is_connected(nbd))
- nbd_size_update(nbd, bdev);
+ nbd_size_update(nbd);
}
static void nbd_end_request(struct nbd_cmd *cmd)
@@ -739,8 +728,7 @@ static int nbd_queue_rq(struct blk_mq_hw_ctx *hctx,
return ret;
}
-static int nbd_add_socket(struct nbd_device *nbd, struct block_device *bdev,
- unsigned long arg)
+static int nbd_add_socket(struct nbd_device *nbd, unsigned long arg)
{
struct nbd_config *config = nbd->config;
struct socket *sock;
@@ -783,8 +771,6 @@ static int nbd_add_socket(struct nbd_device *nbd, struct block_device *bdev,
nsock->sent = 0;
socks[config->num_connections++] = nsock;
- if (max_part)
- bdev->bd_invalidated = 1;
return 0;
}
@@ -800,19 +786,20 @@ static void nbd_bdev_reset(struct block_device *bdev)
{
if (bdev->bd_openers > 1)
return;
- set_device_ro(bdev, false);
- bdev->bd_inode->i_size = 0;
+ bd_set_size(bdev, 0);
if (max_part > 0) {
blkdev_reread_part(bdev);
bdev->bd_invalidated = 1;
}
}
-static void nbd_parse_flags(struct nbd_device *nbd, struct block_device *bdev)
+static void nbd_parse_flags(struct nbd_device *nbd)
{
struct nbd_config *config = nbd->config;
if (config->flags & NBD_FLAG_READ_ONLY)
- set_device_ro(bdev, true);
+ set_disk_ro(nbd->disk, true);
+ else
+ set_disk_ro(nbd->disk, false);
if (config->flags & NBD_FLAG_SEND_TRIM)
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, nbd->disk->queue);
if (config->flags & NBD_FLAG_SEND_FLUSH)
@@ -841,52 +828,36 @@ static void send_disconnects(struct nbd_device *nbd)
}
}
-static int nbd_disconnect(struct nbd_device *nbd, struct block_device *bdev)
+static int nbd_disconnect(struct nbd_device *nbd)
{
struct nbd_config *config = nbd->config;
dev_info(disk_to_dev(nbd->disk), "NBD_DISCONNECT\n");
- mutex_unlock(&nbd->config_lock);
- fsync_bdev(bdev);
- mutex_lock(&nbd->config_lock);
-
if (!test_and_set_bit(NBD_DISCONNECT_REQUESTED,
&config->runtime_flags))
send_disconnects(nbd);
return 0;
}
-static int nbd_clear_sock(struct nbd_device *nbd, struct block_device *bdev)
+static void nbd_clear_sock(struct nbd_device *nbd)
{
sock_shutdown(nbd);
nbd_clear_que(nbd);
-
- __invalidate_device(bdev, true);
- nbd_bdev_reset(bdev);
nbd->task_setup = NULL;
- return 0;
}
static void nbd_config_put(struct nbd_device *nbd)
{
if (refcount_dec_and_mutex_lock(&nbd->config_refs,
&nbd->config_lock)) {
- struct block_device *bdev;
struct nbd_config *config = nbd->config;
-
- bdev = bdget_disk(nbd->disk, 0);
- if (!bdev) {
- mutex_unlock(&nbd->config_lock);
- return;
- }
-
nbd_dev_dbg_close(nbd);
- nbd_size_clear(nbd, bdev);
+ nbd_size_clear(nbd);
if (test_and_clear_bit(NBD_HAS_PID_FILE,
&config->runtime_flags))
device_remove_file(disk_to_dev(nbd->disk), &pid_attr);
nbd->task_recv = NULL;
- nbd_clear_sock(nbd, bdev);
+ nbd_clear_sock(nbd);
if (config->num_connections) {
int i;
for (i = 0; i < config->num_connections; i++) {
@@ -897,7 +868,6 @@ static void nbd_config_put(struct nbd_device *nbd)
}
nbd_reset(nbd);
mutex_unlock(&nbd->config_lock);
- bdput(bdev);
module_put(THIS_MODULE);
}
}
@@ -912,27 +882,30 @@ static int nbd_start_device(struct nbd_device *nbd, struct block_device *bdev)
return -EBUSY;
if (!config->socks)
return -EINVAL;
-
if (num_connections > 1 &&
!(config->flags & NBD_FLAG_CAN_MULTI_CONN)) {
dev_err(disk_to_dev(nbd->disk), "server does not support multiple connections per device.\n");
return -EINVAL;
}
+ if (max_part)
+ bdev->bd_invalidated = 1;
blk_mq_update_nr_hw_queues(&nbd->tag_set, config->num_connections);
nbd->task_recv = current;
mutex_unlock(&nbd->config_lock);
- nbd_parse_flags(nbd, bdev);
+ nbd_parse_flags(nbd);
error = device_create_file(disk_to_dev(nbd->disk), &pid_attr);
if (error) {
dev_err(disk_to_dev(nbd->disk), "device_create_file failed!\n");
return error;
}
- set_bit(NBD_HAS_PID_FILE, &config->runtime_flags);
- nbd_size_update(nbd, bdev);
+ set_bit(NBD_HAS_PID_FILE, &config->runtime_flags);
+ if (max_part)
+ bdev->bd_invalidated = 1;
+ bd_set_size(bdev, config->bytesize);
nbd_dev_dbg_init(nbd);
for (i = 0; i < num_connections; i++) {
@@ -965,6 +938,14 @@ static int nbd_start_device(struct nbd_device *nbd, struct block_device *bdev)
return error;
}
+static void nbd_clear_sock_ioctl(struct nbd_device *nbd,
+ struct block_device *bdev)
+{
+ nbd_clear_sock(nbd);
+ kill_bdev(bdev);
+ nbd_bdev_reset(bdev);
+}
+
/* Must be called with config_lock held */
static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
unsigned int cmd, unsigned long arg)
@@ -973,21 +954,22 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
switch (cmd) {
case NBD_DISCONNECT:
- return nbd_disconnect(nbd, bdev);
+ return nbd_disconnect(nbd);
case NBD_CLEAR_SOCK:
- return nbd_clear_sock(nbd, bdev);
+ nbd_clear_sock_ioctl(nbd, bdev);
+ return 0;
case NBD_SET_SOCK:
- return nbd_add_socket(nbd, bdev, arg);
+ return nbd_add_socket(nbd, arg);
case NBD_SET_BLKSIZE:
- nbd_size_set(nbd, bdev, arg,
+ nbd_size_set(nbd, arg,
div_s64(config->bytesize, arg));
return 0;
case NBD_SET_SIZE:
- nbd_size_set(nbd, bdev, config->blksize,
+ nbd_size_set(nbd, config->blksize,
div_s64(arg, config->blksize));
return 0;
case NBD_SET_SIZE_BLOCKS:
- nbd_size_set(nbd, bdev, config->blksize, arg);
+ nbd_size_set(nbd, config->blksize, arg);
return 0;
case NBD_SET_TIMEOUT:
if (arg) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 15:52:56 +0000