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-rw-r--r--drivers/block/Kconfig5
-rw-r--r--drivers/block/brd.c39
-rw-r--r--drivers/block/cciss_scsi.c72
-rw-r--r--drivers/block/drbd/drbd_actlog.c2
-rw-r--r--drivers/block/drbd/drbd_receiver.c16
-rw-r--r--drivers/block/floppy.c10
-rw-r--r--drivers/block/loop.c2
-rw-r--r--drivers/block/mtip32xx/mtip32xx.c18
-rw-r--r--drivers/block/nbd.c443
-rw-r--r--drivers/block/null_blk.c1
-rw-r--r--drivers/block/pktcdvd.c49
-rw-r--r--drivers/block/skd_main.c238
-rw-r--r--drivers/block/umem.c2
-rw-r--r--drivers/block/xen-blkback/blkback.c10
-rw-r--r--drivers/block/xen-blkback/xenbus.c36
-rw-r--r--drivers/block/xen-blkfront.c84
-rw-r--r--drivers/block/zram/zcomp.c76
-rw-r--r--drivers/block/zram/zcomp.h5
-rw-r--r--drivers/block/zram/zram_drv.c20
19 files changed, 486 insertions, 642 deletions
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 39dd30b6ef86..223ff2fcae7e 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -384,9 +384,12 @@ config BLK_DEV_RAM_DAX
allocated from highmem (only a problem for highmem systems).
config CDROM_PKTCDVD
- tristate "Packet writing on CD/DVD media"
+ tristate "Packet writing on CD/DVD media (DEPRECATED)"
depends on !UML
help
+ Note: This driver is deprecated and will be removed from the
+ kernel in the near future!
+
If you have a CDROM/DVD drive that supports packet writing, say
Y to include support. It should work with any MMC/Mt Fuji
compliant ATAPI or SCSI drive, which is just about any newer
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 0c76d4016eeb..ad793f35632c 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -395,44 +395,9 @@ static long brd_direct_access(struct block_device *bdev, sector_t sector,
#define brd_direct_access NULL
#endif
-static int brd_ioctl(struct block_device *bdev, fmode_t mode,
- unsigned int cmd, unsigned long arg)
-{
- int error;
- struct brd_device *brd = bdev->bd_disk->private_data;
-
- if (cmd != BLKFLSBUF)
- return -ENOTTY;
-
- /*
- * ram device BLKFLSBUF has special semantics, we want to actually
- * release and destroy the ramdisk data.
- */
- mutex_lock(&brd_mutex);
- mutex_lock(&bdev->bd_mutex);
- error = -EBUSY;
- if (bdev->bd_openers <= 1) {
- /*
- * Kill the cache first, so it isn't written back to the
- * device.
- *
- * Another thread might instantiate more buffercache here,
- * but there is not much we can do to close that race.
- */
- kill_bdev(bdev);
- brd_free_pages(brd);
- error = 0;
- }
- mutex_unlock(&bdev->bd_mutex);
- mutex_unlock(&brd_mutex);
-
- return error;
-}
-
static const struct block_device_operations brd_fops = {
.owner = THIS_MODULE,
.rw_page = brd_rw_page,
- .ioctl = brd_ioctl,
.direct_access = brd_direct_access,
};
@@ -443,8 +408,8 @@ static int rd_nr = CONFIG_BLK_DEV_RAM_COUNT;
module_param(rd_nr, int, S_IRUGO);
MODULE_PARM_DESC(rd_nr, "Maximum number of brd devices");
-int rd_size = CONFIG_BLK_DEV_RAM_SIZE;
-module_param(rd_size, int, S_IRUGO);
+unsigned long rd_size = CONFIG_BLK_DEV_RAM_SIZE;
+module_param(rd_size, ulong, S_IRUGO);
MODULE_PARM_DESC(rd_size, "Size of each RAM disk in kbytes.");
static int max_part = 1;
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 1537302e56e3..a18de9d727b0 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -260,43 +260,6 @@ scsi_cmd_stack_free(ctlr_info_t *h)
}
#if 0
-static int xmargin=8;
-static int amargin=60;
-
-static void
-print_bytes (unsigned char *c, int len, int hex, int ascii)
-{
-
- int i;
- unsigned char *x;
-
- if (hex)
- {
- x = c;
- for (i=0;i<len;i++)
- {
- if ((i % xmargin) == 0 && i>0) printk("\n");
- if ((i % xmargin) == 0) printk("0x%04x:", i);
- printk(" %02x", *x);
- x++;
- }
- printk("\n");
- }
- if (ascii)
- {
- x = c;
- for (i=0;i<len;i++)
- {
- if ((i % amargin) == 0 && i>0) printk("\n");
- if ((i % amargin) == 0) printk("0x%04x:", i);
- if (*x > 26 && *x < 128) printk("%c", *x);
- else printk(".");
- x++;
- }
- printk("\n");
- }
-}
-
static void
print_cmd(CommandList_struct *cp)
{
@@ -305,30 +268,13 @@ print_cmd(CommandList_struct *cp)
printk("sgtot:%d\n", cp->Header.SGTotal);
printk("Tag:0x%08x/0x%08x\n", cp->Header.Tag.upper,
cp->Header.Tag.lower);
- printk("LUN:0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
- cp->Header.LUN.LunAddrBytes[0],
- cp->Header.LUN.LunAddrBytes[1],
- cp->Header.LUN.LunAddrBytes[2],
- cp->Header.LUN.LunAddrBytes[3],
- cp->Header.LUN.LunAddrBytes[4],
- cp->Header.LUN.LunAddrBytes[5],
- cp->Header.LUN.LunAddrBytes[6],
- cp->Header.LUN.LunAddrBytes[7]);
+ printk("LUN:0x%8phN\n", cp->Header.LUN.LunAddrBytes);
printk("CDBLen:%d\n", cp->Request.CDBLen);
printk("Type:%d\n",cp->Request.Type.Type);
printk("Attr:%d\n",cp->Request.Type.Attribute);
printk(" Dir:%d\n",cp->Request.Type.Direction);
printk("Timeout:%d\n",cp->Request.Timeout);
- printk( "CDB: %02x %02x %02x %02x %02x %02x %02x %02x"
- " %02x %02x %02x %02x %02x %02x %02x %02x\n",
- cp->Request.CDB[0], cp->Request.CDB[1],
- cp->Request.CDB[2], cp->Request.CDB[3],
- cp->Request.CDB[4], cp->Request.CDB[5],
- cp->Request.CDB[6], cp->Request.CDB[7],
- cp->Request.CDB[8], cp->Request.CDB[9],
- cp->Request.CDB[10], cp->Request.CDB[11],
- cp->Request.CDB[12], cp->Request.CDB[13],
- cp->Request.CDB[14], cp->Request.CDB[15]),
+ printk("CDB: %16ph\n", cp->Request.CDB);
printk("edesc.Addr: 0x%08x/0%08x, Len = %d\n",
cp->ErrDesc.Addr.upper, cp->ErrDesc.Addr.lower,
cp->ErrDesc.Len);
@@ -340,9 +286,7 @@ print_cmd(CommandList_struct *cp)
printk("offense size:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_size);
printk("offense byte:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_num);
printk("offense value:%d\n", cp->err_info->MoreErrInfo.Invalid_Cmd.offense_value);
-
}
-
#endif
static int
@@ -782,8 +726,10 @@ static void complete_scsi_command(CommandList_struct *c, int timeout,
"reported\n", c);
break;
case CMD_INVALID: {
- /* print_bytes(c, sizeof(*c), 1, 0);
- print_cmd(c); */
+ /*
+ print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, c, sizeof(*c), false);
+ print_cmd(c);
+ */
/* We get CMD_INVALID if you address a non-existent tape drive instead
of a selection timeout (no response). You will see this if you yank
out a tape drive, then try to access it. This is kind of a shame
@@ -985,8 +931,10 @@ cciss_scsi_interpret_error(ctlr_info_t *h, CommandList_struct *c)
dev_warn(&h->pdev->dev,
"%p is reported invalid (probably means "
"target device no longer present)\n", c);
- /* print_bytes((unsigned char *) c, sizeof(*c), 1, 0);
- print_cmd(c); */
+ /*
+ print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, c, sizeof(*c), false);
+ print_cmd(c);
+ */
}
break;
case CMD_PROTOCOL_ERR:
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c
index 2d3d50ab74bf..8d7bcfa49c12 100644
--- a/drivers/block/drbd/drbd_actlog.c
+++ b/drivers/block/drbd/drbd_actlog.c
@@ -148,7 +148,7 @@ static int _drbd_md_sync_page_io(struct drbd_device *device,
if ((op == REQ_OP_WRITE) && !test_bit(MD_NO_FUA, &device->flags))
op_flags |= REQ_FUA | REQ_PREFLUSH;
- op_flags |= REQ_SYNC | REQ_NOIDLE;
+ op_flags |= REQ_SYNC;
bio = bio_alloc_drbd(GFP_NOIO);
bio->bi_bdev = bdev->md_bdev;
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 942384f34e22..c7728dd77230 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1266,7 +1266,7 @@ static void submit_one_flush(struct drbd_device *device, struct issue_flush_cont
bio->bi_bdev = device->ldev->backing_bdev;
bio->bi_private = octx;
bio->bi_end_io = one_flush_endio;
- bio_set_op_attrs(bio, REQ_OP_FLUSH, WRITE_FLUSH);
+ bio->bi_opf = REQ_OP_FLUSH | REQ_PREFLUSH;
device->flush_jif = jiffies;
set_bit(FLUSH_PENDING, &device->flags);
@@ -1648,20 +1648,8 @@ next_bio:
page_chain_for_each(page) {
unsigned len = min_t(unsigned, data_size, PAGE_SIZE);
- if (!bio_add_page(bio, page, len, 0)) {
- /* A single page must always be possible!
- * But in case it fails anyways,
- * we deal with it, and complain (below). */
- if (bio->bi_vcnt == 0) {
- drbd_err(device,
- "bio_add_page failed for len=%u, "
- "bi_vcnt=0 (bi_sector=%llu)\n",
- len, (uint64_t)bio->bi_iter.bi_sector);
- err = -ENOSPC;
- goto fail;
- }
+ if (!bio_add_page(bio, page, len, 0))
goto next_bio;
- }
data_size -= len;
sector += len >> 9;
--nr_pages;
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index e3d8e4ced4a2..a391a3cfb3fe 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3806,14 +3806,10 @@ static int __floppy_read_block_0(struct block_device *bdev, int drive)
cbdata.drive = drive;
- bio_init(&bio);
- bio.bi_io_vec = &bio_vec;
- bio_vec.bv_page = page;
- bio_vec.bv_len = size;
- bio_vec.bv_offset = 0;
- bio.bi_vcnt = 1;
- bio.bi_iter.bi_size = size;
+ bio_init(&bio, &bio_vec, 1);
bio.bi_bdev = bdev;
+ bio_add_page(&bio, page, size, 0);
+
bio.bi_iter.bi_sector = 0;
bio.bi_flags |= (1 << BIO_QUIET);
bio.bi_private = &cbdata;
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index fa1b7a90ba11..4af818766797 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1646,7 +1646,7 @@ static int loop_queue_rq(struct blk_mq_hw_ctx *hctx,
blk_mq_start_request(bd->rq);
if (lo->lo_state != Lo_bound)
- return -EIO;
+ return BLK_MQ_RQ_QUEUE_ERROR;
switch (req_op(cmd->rq)) {
case REQ_OP_FLUSH:
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 3cfd879267b2..f96ab717534c 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -2035,18 +2035,14 @@ static int exec_drive_taskfile(struct driver_data *dd,
taskout = req_task->out_size;
taskin = req_task->in_size;
/* 130560 = 512 * 0xFF*/
- if (taskin > 130560 || taskout > 130560) {
- err = -EINVAL;
- goto abort;
- }
+ if (taskin > 130560 || taskout > 130560)
+ return -EINVAL;
if (taskout) {
outbuf = memdup_user(buf + outtotal, taskout);
- if (IS_ERR(outbuf)) {
- err = PTR_ERR(outbuf);
- outbuf = NULL;
- goto abort;
- }
+ if (IS_ERR(outbuf))
+ return PTR_ERR(outbuf);
+
outbuf_dma = pci_map_single(dd->pdev,
outbuf,
taskout,
@@ -3937,8 +3933,10 @@ static int mtip_block_initialize(struct driver_data *dd)
/* Generate the disk name, implemented same as in sd.c */
do {
- if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL))
+ if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL)) {
+ rv = -ENOMEM;
goto ida_get_error;
+ }
spin_lock(&rssd_index_lock);
rv = ida_get_new(&rssd_index_ida, &index);
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 7a1048755914..99c84468f154 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -41,26 +41,34 @@
#include <linux/nbd.h>
+struct nbd_sock {
+ struct socket *sock;
+ struct mutex tx_lock;
+};
+
#define NBD_TIMEDOUT 0
#define NBD_DISCONNECT_REQUESTED 1
+#define NBD_DISCONNECTED 2
+#define NBD_RUNNING 3
struct nbd_device {
u32 flags;
unsigned long runtime_flags;
- struct socket * sock; /* If == NULL, device is not ready, yet */
+ struct nbd_sock **socks;
int magic;
struct blk_mq_tag_set tag_set;
- struct mutex tx_lock;
+ struct mutex config_lock;
struct gendisk *disk;
- int blksize;
+ int num_connections;
+ atomic_t recv_threads;
+ wait_queue_head_t recv_wq;
+ loff_t blksize;
loff_t bytesize;
- /* protects initialization and shutdown of the socket */
- spinlock_t sock_lock;
struct task_struct *task_recv;
- struct task_struct *task_send;
+ struct task_struct *task_setup;
#if IS_ENABLED(CONFIG_DEBUG_FS)
struct dentry *dbg_dir;
@@ -69,7 +77,7 @@ struct nbd_device {
struct nbd_cmd {
struct nbd_device *nbd;
- struct list_head list;
+ struct completion send_complete;
};
#if IS_ENABLED(CONFIG_DEBUG_FS)
@@ -126,7 +134,7 @@ static void nbd_size_update(struct nbd_device *nbd, struct block_device *bdev)
}
static int nbd_size_set(struct nbd_device *nbd, struct block_device *bdev,
- int blocksize, int nr_blocks)
+ loff_t blocksize, loff_t nr_blocks)
{
int ret;
@@ -135,7 +143,7 @@ static int nbd_size_set(struct nbd_device *nbd, struct block_device *bdev,
return ret;
nbd->blksize = blocksize;
- nbd->bytesize = (loff_t)blocksize * (loff_t)nr_blocks;
+ nbd->bytesize = blocksize * nr_blocks;
nbd_size_update(nbd, bdev);
@@ -159,22 +167,20 @@ static void nbd_end_request(struct nbd_cmd *cmd)
*/
static void sock_shutdown(struct nbd_device *nbd)
{
- struct socket *sock;
-
- spin_lock(&nbd->sock_lock);
+ int i;
- if (!nbd->sock) {
- spin_unlock(&nbd->sock_lock);
+ if (nbd->num_connections == 0)
+ return;
+ if (test_and_set_bit(NBD_DISCONNECTED, &nbd->runtime_flags))
return;
- }
-
- sock = nbd->sock;
- dev_warn(disk_to_dev(nbd->disk), "shutting down socket\n");
- nbd->sock = NULL;
- spin_unlock(&nbd->sock_lock);
- kernel_sock_shutdown(sock, SHUT_RDWR);
- sockfd_put(sock);
+ for (i = 0; i < nbd->num_connections; i++) {
+ struct nbd_sock *nsock = nbd->socks[i];
+ mutex_lock(&nsock->tx_lock);
+ kernel_sock_shutdown(nsock->sock, SHUT_RDWR);
+ mutex_unlock(&nsock->tx_lock);
+ }
+ dev_warn(disk_to_dev(nbd->disk), "shutting down sockets\n");
}
static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req,
@@ -182,42 +188,38 @@ static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req,
{
struct nbd_cmd *cmd = blk_mq_rq_to_pdu(req);
struct nbd_device *nbd = cmd->nbd;
- struct socket *sock = NULL;
-
- spin_lock(&nbd->sock_lock);
+ dev_err(nbd_to_dev(nbd), "Connection timed out, shutting down connection\n");
set_bit(NBD_TIMEDOUT, &nbd->runtime_flags);
-
- if (nbd->sock) {
- sock = nbd->sock;
- get_file(sock->file);
- }
-
- spin_unlock(&nbd->sock_lock);
- if (sock) {
- kernel_sock_shutdown(sock, SHUT_RDWR);
- sockfd_put(sock);
- }
-
req->errors++;
- dev_err(nbd_to_dev(nbd), "Connection timed out, shutting down connection\n");
+
+ /*
+ * If our disconnect packet times out then we're already holding the
+ * config_lock and could deadlock here, so just set an error and return,
+ * we'll handle shutting everything down later.
+ */
+ if (req->cmd_type == REQ_TYPE_DRV_PRIV)
+ return BLK_EH_HANDLED;
+ mutex_lock(&nbd->config_lock);
+ sock_shutdown(nbd);
+ mutex_unlock(&nbd->config_lock);
return BLK_EH_HANDLED;
}
/*
* Send or receive packet.
*/
-static int sock_xmit(struct nbd_device *nbd, int send, void *buf, int size,
- int msg_flags)
+static int sock_xmit(struct nbd_device *nbd, int index, int send, void *buf,
+ int size, int msg_flags)
{
- struct socket *sock = nbd->sock;
+ struct socket *sock = nbd->socks[index]->sock;
int result;
struct msghdr msg;
struct kvec iov;
unsigned long pflags = current->flags;
if (unlikely(!sock)) {
- dev_err(disk_to_dev(nbd->disk),
+ dev_err_ratelimited(disk_to_dev(nbd->disk),
"Attempted %s on closed socket in sock_xmit\n",
(send ? "send" : "recv"));
return -EINVAL;
@@ -254,29 +256,29 @@ static int sock_xmit(struct nbd_device *nbd, int send, void *buf, int size,
return result;
}
-static inline int sock_send_bvec(struct nbd_device *nbd, struct bio_vec *bvec,
- int flags)
+static inline int sock_send_bvec(struct nbd_device *nbd, int index,
+ struct bio_vec *bvec, int flags)
{
int result;
void *kaddr = kmap(bvec->bv_page);
- result = sock_xmit(nbd, 1, kaddr + bvec->bv_offset,
+ result = sock_xmit(nbd, index, 1, kaddr + bvec->bv_offset,
bvec->bv_len, flags);
kunmap(bvec->bv_page);
return result;
}
/* always call with the tx_lock held */
-static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd)
+static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
{
struct request *req = blk_mq_rq_from_pdu(cmd);
int result, flags;
struct nbd_request request;
unsigned long size = blk_rq_bytes(req);
+ struct bio *bio;
u32 type;
+ u32 tag = blk_mq_unique_tag(req);
- if (req->cmd_type == REQ_TYPE_DRV_PRIV)
- type = NBD_CMD_DISC;
- else if (req_op(req) == REQ_OP_DISCARD)
+ if (req_op(req) == REQ_OP_DISCARD)
type = NBD_CMD_TRIM;
else if (req_op(req) == REQ_OP_FLUSH)
type = NBD_CMD_FLUSH;
@@ -288,73 +290,89 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd)
memset(&request, 0, sizeof(request));
request.magic = htonl(NBD_REQUEST_MAGIC);
request.type = htonl(type);
- if (type != NBD_CMD_FLUSH && type != NBD_CMD_DISC) {
+ if (type != NBD_CMD_FLUSH) {
request.from = cpu_to_be64((u64)blk_rq_pos(req) << 9);
request.len = htonl(size);
}
- memcpy(request.handle, &req->tag, sizeof(req->tag));
+ memcpy(request.handle, &tag, sizeof(tag));
dev_dbg(nbd_to_dev(nbd), "request %p: sending control (%s@%llu,%uB)\n",
cmd, nbdcmd_to_ascii(type),
(unsigned long long)blk_rq_pos(req) << 9, blk_rq_bytes(req));
- result = sock_xmit(nbd, 1, &request, sizeof(request),
+ result = sock_xmit(nbd, index, 1, &request, sizeof(request),
(type == NBD_CMD_WRITE) ? MSG_MORE : 0);
if (result <= 0) {
- dev_err(disk_to_dev(nbd->disk),
+ dev_err_ratelimited(disk_to_dev(nbd->disk),
"Send control failed (result %d)\n", result);
return -EIO;
}
- if (type == NBD_CMD_WRITE) {
- struct req_iterator iter;
+ if (type != NBD_CMD_WRITE)
+ return 0;
+
+ flags = 0;
+ bio = req->bio;
+ while (bio) {
+ struct bio *next = bio->bi_next;
+ struct bvec_iter iter;
struct bio_vec bvec;
- /*
- * we are really probing at internals to determine
- * whether to set MSG_MORE or not...
- */
- rq_for_each_segment(bvec, req, iter) {
- flags = 0;
- if (!rq_iter_last(bvec, iter))
+
+ bio_for_each_segment(bvec, bio, iter) {
+ bool is_last = !next && bio_iter_last(bvec, iter);
+
+ if (is_last)
flags = MSG_MORE;
dev_dbg(nbd_to_dev(nbd), "request %p: sending %d bytes data\n",
cmd, bvec.bv_len);
- result = sock_send_bvec(nbd, &bvec, flags);
+ result = sock_send_bvec(nbd, index, &bvec, flags);
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk),
"Send data failed (result %d)\n",
result);
return -EIO;
}
+ /*
+ * The completion might already have come in,
+ * so break for the last one instead of letting
+ * the iterator do it. This prevents use-after-free
+ * of the bio.
+ */
+ if (is_last)
+ break;
}
+ bio = next;
}
return 0;
}
-static inline int sock_recv_bvec(struct nbd_device *nbd, struct bio_vec *bvec)
+static inline int sock_recv_bvec(struct nbd_device *nbd, int index,
+ struct bio_vec *bvec)
{
int result;
void *kaddr = kmap(bvec->bv_page);
- result = sock_xmit(nbd, 0, kaddr + bvec->bv_offset, bvec->bv_len,
- MSG_WAITALL);
+ result = sock_xmit(nbd, index, 0, kaddr + bvec->bv_offset,
+ bvec->bv_len, MSG_WAITALL);
kunmap(bvec->bv_page);
return result;
}
/* NULL returned = something went wrong, inform userspace */
-static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd)
+static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd, int index)
{
int result;
struct nbd_reply reply;
struct nbd_cmd *cmd;
struct request *req = NULL;
u16 hwq;
- int tag;
+ u32 tag;
reply.magic = 0;
- result = sock_xmit(nbd, 0, &reply, sizeof(reply), MSG_WAITALL);
+ result = sock_xmit(nbd, index, 0, &reply, sizeof(reply), MSG_WAITALL);
if (result <= 0) {
- dev_err(disk_to_dev(nbd->disk),
- "Receive control failed (result %d)\n", result);
+ if (!test_bit(NBD_DISCONNECTED, &nbd->runtime_flags) &&
+ !test_bit(NBD_DISCONNECT_REQUESTED, &nbd->runtime_flags))
+ dev_err(disk_to_dev(nbd->disk),
+ "Receive control failed (result %d)\n", result);
return ERR_PTR(result);
}
@@ -364,7 +382,7 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd)
return ERR_PTR(-EPROTO);
}
- memcpy(&tag, reply.handle, sizeof(int));
+ memcpy(&tag, reply.handle, sizeof(u32));
hwq = blk_mq_unique_tag_to_hwq(tag);
if (hwq < nbd->tag_set.nr_hw_queues)
@@ -376,7 +394,6 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd)
return ERR_PTR(-ENOENT);
}
cmd = blk_mq_rq_to_pdu(req);
-
if (ntohl(reply.error)) {
dev_err(disk_to_dev(nbd->disk), "Other side returned error (%d)\n",
ntohl(reply.error));
@@ -390,7 +407,7 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd)
struct bio_vec bvec;
rq_for_each_segment(bvec, req, iter) {
- result = sock_recv_bvec(nbd, &bvec);
+ result = sock_recv_bvec(nbd, index, &bvec);
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk), "Receive data failed (result %d)\n",
result);
@@ -400,6 +417,9 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd)
dev_dbg(nbd_to_dev(nbd), "request %p: got %d bytes data\n",
cmd, bvec.bv_len);
}
+ } else {
+ /* See the comment in nbd_queue_rq. */
+ wait_for_completion(&cmd->send_complete);
}
return cmd;
}
@@ -418,25 +438,24 @@ static struct device_attribute pid_attr = {
.show = pid_show,
};
-static int nbd_thread_recv(struct nbd_device *nbd, struct block_device *bdev)
+struct recv_thread_args {
+ struct work_struct work;
+ struct nbd_device *nbd;
+ int index;
+};
+
+static void recv_work(struct work_struct *work)
{
+ struct recv_thread_args *args = container_of(work,
+ struct recv_thread_args,
+ work);
+ struct nbd_device *nbd = args->nbd;
struct nbd_cmd *cmd;
- int ret;
+ int ret = 0;
BUG_ON(nbd->magic != NBD_MAGIC);
-
- sk_set_memalloc(nbd->sock->sk);
-
- ret = device_create_file(disk_to_dev(nbd->disk), &pid_attr);
- if (ret) {
- dev_err(disk_to_dev(nbd->disk), "device_create_file failed!\n");
- return ret;
- }
-
- nbd_size_update(nbd, bdev);
-
while (1) {
- cmd = nbd_read_stat(nbd);
+ cmd = nbd_read_stat(nbd, args->index);
if (IS_ERR(cmd)) {
ret = PTR_ERR(cmd);
break;
@@ -445,10 +464,14 @@ static int nbd_thread_recv(struct nbd_device *nbd, struct block_device *bdev)
nbd_end_request(cmd);
}
- nbd_size_clear(nbd, bdev);
-
- device_remove_file(disk_to_dev(nbd->disk), &pid_attr);
- return ret;
+ /*
+ * We got an error, shut everybody down if this wasn't the result of a
+ * disconnect request.
+ */
+ if (ret && !test_bit(NBD_DISCONNECT_REQUESTED, &nbd->runtime_flags))
+ sock_shutdown(nbd);
+ atomic_dec(&nbd->recv_threads);
+ wake_up(&nbd->recv_wq);
}
static void nbd_clear_req(struct request *req, void *data, bool reserved)
@@ -466,51 +489,60 @@ static void nbd_clear_que(struct nbd_device *nbd)
{
BUG_ON(nbd->magic != NBD_MAGIC);
- /*
- * Because we have set nbd->sock to NULL under the tx_lock, all
- * modifications to the list must have completed by now.
- */
- BUG_ON(nbd->sock);
-
blk_mq_tagset_busy_iter(&nbd->tag_set, nbd_clear_req, NULL);
dev_dbg(disk_to_dev(nbd->disk), "queue cleared\n");
}
-static void nbd_handle_cmd(struct nbd_cmd *cmd)
+static void nbd_handle_cmd(struct nbd_cmd *cmd, int index)
{
struct request *req = blk_mq_rq_from_pdu(cmd);
struct nbd_device *nbd = cmd->nbd;
+ struct nbd_sock *nsock;
+
+ if (index >= nbd->num_connections) {
+ dev_err_ratelimited(disk_to_dev(nbd->disk),
+ "Attempted send on invalid socket\n");
+ goto error_out;
+ }
+
+ if (test_bit(NBD_DISCONNECTED, &nbd->runtime_flags)) {
+ dev_err_ratelimited(disk_to_dev(nbd->disk),
+ "Attempted send on closed socket\n");
+ goto error_out;
+ }
- if (req->cmd_type != REQ_TYPE_FS)
+ if (req->cmd_type != REQ_TYPE_FS &&
+ req->cmd_type != REQ_TYPE_DRV_PRIV)
goto error_out;
- if (rq_data_dir(req) == WRITE &&
+ if (req->cmd_type == REQ_TYPE_FS &&
+ rq_data_dir(req) == WRITE &&
(nbd->flags & NBD_FLAG_READ_ONLY)) {
- dev_err(disk_to_dev(nbd->disk),
- "Write on read-only\n");
+ dev_err_ratelimited(disk_to_dev(nbd->disk),
+ "Write on read-only\n");
goto error_out;
}
req->errors = 0;
- mutex_lock(&nbd->tx_lock);
- nbd->task_send = current;
- if (unlikely(!nbd->sock)) {
- mutex_unlock(&nbd->tx_lock);
- dev_err(disk_to_dev(nbd->disk),
- "Attempted send on closed socket\n");
+ nsock = nbd->socks[index];
+ mutex_lock(&nsock->tx_lock);
+ if (unlikely(!nsock->sock)) {
+ mutex_unlock(&nsock->tx_lock);
+ dev_err_ratelimited(disk_to_dev(nbd->disk),
+ "Attempted send on closed socket\n");
goto error_out;
}
- if (nbd_send_cmd(nbd, cmd) != 0) {
- dev_err(disk_to_dev(nbd->disk), "Request send failed\n");
+ if (nbd_send_cmd(nbd, cmd, index) != 0) {
+ dev_err_ratelimited(disk_to_dev(nbd->disk),
+ "Request send failed\n");
req->errors++;
nbd_end_request(cmd);
}
- nbd->task_send = NULL;
- mutex_unlock(&nbd->tx_lock);
+ mutex_unlock(&nsock->tx_lock);
return;
@@ -524,39 +556,70 @@ static int nbd_queue_rq(struct blk_mq_hw_ctx *hctx,
{
struct nbd_cmd *cmd = blk_mq_rq_to_pdu(bd->rq);
+ /*
+ * Since we look at the bio's to send the request over the network we
+ * need to make sure the completion work doesn't mark this request done
+ * before we are done doing our send. This keeps us from dereferencing
+ * freed data if we have particularly fast completions (ie we get the
+ * completion before we exit sock_xmit on the last bvec) or in the case
+ * that the server is misbehaving (or there was an error) before we're
+ * done sending everything over the wire.
+ */
+ init_completion(&cmd->send_complete);
blk_mq_start_request(bd->rq);
- nbd_handle_cmd(cmd);
+ nbd_handle_cmd(cmd, hctx->queue_num);
+ complete(&cmd->send_complete);
+
return BLK_MQ_RQ_QUEUE_OK;
}
-static int nbd_set_socket(struct nbd_device *nbd, struct socket *sock)
+static int nbd_add_socket(struct nbd_device *nbd, struct socket *sock)
{
- int ret = 0;
-
- spin_lock_irq(&nbd->sock_lock);
+ struct nbd_sock **socks;
+ struct nbd_sock *nsock;
- if (nbd->sock) {
- ret = -EBUSY;
- goto out;
+ if (!nbd->task_setup)
+ nbd->task_setup = current;
+ if (nbd->task_setup != current) {
+ dev_err(disk_to_dev(nbd->disk),
+ "Device being setup by another task");
+ return -EINVAL;
}
- nbd->sock = sock;
+ socks = krealloc(nbd->socks, (nbd->num_connections + 1) *
+ sizeof(struct nbd_sock *), GFP_KERNEL);
+ if (!socks)
+ return -ENOMEM;
+ nsock = kzalloc(sizeof(struct nbd_sock), GFP_KERNEL);
+ if (!nsock)
+ return -ENOMEM;
-out:
- spin_unlock_irq(&nbd->sock_lock);
+ nbd->socks = socks;
+
+ mutex_init(&nsock->tx_lock);
+ nsock->sock = sock;
+ socks[nbd->num_connections++] = nsock;
- return ret;
+ return 0;
}
/* Reset all properties of an NBD device */
static void nbd_reset(struct nbd_device *nbd)
{
+ int i;
+
+ for (i = 0; i < nbd->num_connections; i++)
+ kfree(nbd->socks[i]);
+ kfree(nbd->socks);
+ nbd->socks = NULL;
nbd->runtime_flags = 0;
nbd->blksize = 1024;
nbd->bytesize = 0;
set_capacity(nbd->disk, 0);
nbd->flags = 0;
nbd->tag_set.timeout = 0;
+ nbd->num_connections = 0;
+ nbd->task_setup = NULL;
queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, nbd->disk->queue);
}
@@ -582,48 +645,68 @@ static void nbd_parse_flags(struct nbd_device *nbd, struct block_device *bdev)
blk_queue_write_cache(nbd->disk->queue, false, false);
}
+static void send_disconnects(struct nbd_device *nbd)
+{
+ struct nbd_request request = {};
+ int i, ret;
+
+ request.magic = htonl(NBD_REQUEST_MAGIC);
+ request.type = htonl(NBD_CMD_DISC);
+
+ for (i = 0; i < nbd->num_connections; i++) {
+ ret = sock_xmit(nbd, i, 1, &request, sizeof(request), 0);
+ if (ret <= 0)
+ dev_err(disk_to_dev(nbd->disk),
+ "Send disconnect failed %d\n", ret);
+ }
+}
+
static int nbd_dev_dbg_init(struct nbd_device *nbd);
static void nbd_dev_dbg_close(struct nbd_device *nbd);
-/* Must be called with tx_lock held */
-
+/* 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)
{
switch (cmd) {
case NBD_DISCONNECT: {
- struct request *sreq;
-
dev_info(disk_to_dev(nbd->disk), "NBD_DISCONNECT\n");
- if (!nbd->sock)
+ if (!nbd->socks)
return -EINVAL;
- sreq = blk_mq_alloc_request(bdev_get_queue(bdev), WRITE, 0);
- if (IS_ERR(sreq))
- return -ENOMEM;
-
- mutex_unlock(&nbd->tx_lock);
+ mutex_unlock(&nbd->config_lock);
fsync_bdev(bdev);
- mutex_lock(&nbd->tx_lock);
- sreq->cmd_type = REQ_TYPE_DRV_PRIV;
+ mutex_lock(&nbd->config_lock);
/* Check again after getting mutex back. */
- if (!nbd->sock) {
- blk_mq_free_request(sreq);
+ if (!nbd->socks)
return -EINVAL;
- }
- set_bit(NBD_DISCONNECT_REQUESTED, &nbd->runtime_flags);
-
- nbd_send_cmd(nbd, blk_mq_rq_to_pdu(sreq));
- blk_mq_free_request(sreq);
+ if (!test_and_set_bit(NBD_DISCONNECT_REQUESTED,
+ &nbd->runtime_flags))
+ send_disconnects(nbd);
return 0;
}
-
+
case NBD_CLEAR_SOCK:
sock_shutdown(nbd);
nbd_clear_que(nbd);
kill_bdev(bdev);
+ nbd_bdev_reset(bdev);
+ /*
+ * We want to give the run thread a chance to wait for everybody
+ * to clean up and then do it's own cleanup.
+ */
+ if (!test_bit(NBD_RUNNING, &nbd->runtime_flags)) {
+ int i;
+
+ for (i = 0; i < nbd->num_connections; i++)
+ kfree(nbd->socks[i]);
+ kfree(nbd->socks);
+ nbd->socks = NULL;
+ nbd->num_connections = 0;
+ nbd->task_setup = NULL;
+ }
return 0;
case NBD_SET_SOCK: {
@@ -633,7 +716,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
if (!sock)
return err;
- err = nbd_set_socket(nbd, sock);
+ err = nbd_add_socket(nbd, sock);
if (!err && max_part)
bdev->bd_invalidated = 1;
@@ -648,7 +731,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
case NBD_SET_SIZE:
return nbd_size_set(nbd, bdev, nbd->blksize,
- arg / nbd->blksize);
+ div_s64(arg, nbd->blksize));
case NBD_SET_SIZE_BLOCKS:
return nbd_size_set(nbd, bdev, nbd->blksize, arg);
@@ -662,26 +745,61 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
return 0;
case NBD_DO_IT: {
- int error;
+ struct recv_thread_args *args;
+ int num_connections = nbd->num_connections;
+ int error = 0, i;
if (nbd->task_recv)
return -EBUSY;
- if (!nbd->sock)
+ if (!nbd->socks)
return -EINVAL;
+ if (num_connections > 1 &&
+ !(nbd->flags & NBD_FLAG_CAN_MULTI_CONN)) {
+ dev_err(disk_to_dev(nbd->disk), "server does not support multiple connections per device.\n");
+ error = -EINVAL;
+ goto out_err;
+ }
- /* We have to claim the device under the lock */
+ set_bit(NBD_RUNNING, &nbd->runtime_flags);
+ blk_mq_update_nr_hw_queues(&nbd->tag_set, nbd->num_connections);
+ args = kcalloc(num_connections, sizeof(*args), GFP_KERNEL);
+ if (!args) {
+ error = -ENOMEM;
+ goto out_err;
+ }
nbd->task_recv = current;
- mutex_unlock(&nbd->tx_lock);
+ mutex_unlock(&nbd->config_lock);
nbd_parse_flags(nbd, bdev);
+ 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");
+ goto out_recv;
+ }
+
+ nbd_size_update(nbd, bdev);
+
nbd_dev_dbg_init(nbd);
- error = nbd_thread_recv(nbd, bdev);
+ for (i = 0; i < num_connections; i++) {
+ sk_set_memalloc(nbd->socks[i]->sock->sk);
+ atomic_inc(&nbd->recv_threads);
+ INIT_WORK(&args[i].work, recv_work);
+ args[i].nbd = nbd;
+ args[i].index = i;
+ queue_work(system_long_wq, &args[i].work);
+ }
+ wait_event_interruptible(nbd->recv_wq,
+ atomic_read(&nbd->recv_threads) == 0);
+ for (i = 0; i < num_connections; i++)
+ flush_work(&args[i].work);
nbd_dev_dbg_close(nbd);
-
- mutex_lock(&nbd->tx_lock);
+ nbd_size_clear(nbd, bdev);
+ device_remove_file(disk_to_dev(nbd->disk), &pid_attr);
+out_recv:
+ mutex_lock(&nbd->config_lock);
nbd->task_recv = NULL;
-
+out_err:
sock_shutdown(nbd);
nbd_clear_que(nbd);
kill_bdev(bdev);
@@ -694,7 +812,6 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
error = -ETIMEDOUT;
nbd_reset(nbd);
-
return error;
}
@@ -726,9 +843,9 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
BUG_ON(nbd->magic != NBD_MAGIC);
- mutex_lock(&nbd->tx_lock);
+ mutex_lock(&nbd->config_lock);
error = __nbd_ioctl(bdev, nbd, cmd, arg);
- mutex_unlock(&nbd->tx_lock);
+ mutex_unlock(&nbd->config_lock);
return error;
}
@@ -748,8 +865,6 @@ static int nbd_dbg_tasks_show(struct seq_file *s, void *unused)
if (nbd->task_recv)
seq_printf(s, "recv: %d\n", task_pid_nr(nbd->task_recv));
- if (nbd->task_send)
- seq_printf(s, "send: %d\n", task_pid_nr(nbd->task_send));
return 0;
}
@@ -817,7 +932,7 @@ static int nbd_dev_dbg_init(struct nbd_device *nbd)
debugfs_create_file("tasks", 0444, dir, nbd, &nbd_dbg_tasks_ops);
debugfs_create_u64("size_bytes", 0444, dir, &nbd->bytesize);
debugfs_create_u32("timeout", 0444, dir, &nbd->tag_set.timeout);
- debugfs_create_u32("blocksize", 0444, dir, &nbd->blksize);
+ debugfs_create_u64("blocksize", 0444, dir, &nbd->blksize);
debugfs_create_file("flags", 0444, dir, nbd, &nbd_dbg_flags_ops);
return 0;
@@ -873,9 +988,7 @@ static int nbd_init_request(void *data, struct request *rq,
unsigned int numa_node)
{
struct nbd_cmd *cmd = blk_mq_rq_to_pdu(rq);
-
cmd->nbd = data;
- INIT_LIST_HEAD(&cmd->list);
return 0;
}
@@ -985,13 +1098,13 @@ static int __init nbd_init(void)
for (i = 0; i < nbds_max; i++) {
struct gendisk *disk = nbd_dev[i].disk;
nbd_dev[i].magic = NBD_MAGIC;
- spin_lock_init(&nbd_dev[i].sock_lock);
- mutex_init(&nbd_dev[i].tx_lock);
+ mutex_init(&nbd_dev[i].config_lock);
disk->major = NBD_MAJOR;
disk->first_minor = i << part_shift;
disk->fops = &nbd_fops;
disk->private_data = &nbd_dev[i];
sprintf(disk->disk_name, "nbd%d", i);
+ init_waitqueue_head(&nbd_dev[i].recv_wq);
nbd_reset(&nbd_dev[i]);
add_disk(disk);
}
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index ba6f4a2e73db..4943ee22716e 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -577,6 +577,7 @@ static void null_nvm_unregister(struct nullb *nullb)
#else
static int null_nvm_register(struct nullb *nullb)
{
+ pr_err("null_blk: CONFIG_NVM needs to be enabled for LightNVM\n");
return -EINVAL;
}
static void null_nvm_unregister(struct nullb *nullb) {}
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 90fa4ac149db..95c98de92971 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -721,7 +721,7 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
rq->timeout = 60*HZ;
if (cgc->quiet)
- rq->cmd_flags |= REQ_QUIET;
+ rq->rq_flags |= RQF_QUIET;
blk_execute_rq(rq->q, pd->bdev->bd_disk, rq, 0);
if (rq->errors)
@@ -944,39 +944,6 @@ static int pkt_set_segment_merging(struct pktcdvd_device *pd, struct request_que
}
}
-/*
- * Copy all data for this packet to pkt->pages[], so that
- * a) The number of required segments for the write bio is minimized, which
- * is necessary for some scsi controllers.
- * b) The data can be used as cache to avoid read requests if we receive a
- * new write request for the same zone.
- */
-static void pkt_make_local_copy(struct packet_data *pkt, struct bio_vec *bvec)
-{
- int f, p, offs;
-
- /* Copy all data to pkt->pages[] */
- p = 0;
- offs = 0;
- for (f = 0; f < pkt->frames; f++) {
- if (bvec[f].bv_page != pkt->pages[p]) {
- void *vfrom = kmap_atomic(bvec[f].bv_page) + bvec[f].bv_offset;
- void *vto = page_address(pkt->pages[p]) + offs;
- memcpy(vto, vfrom, CD_FRAMESIZE);
- kunmap_atomic(vfrom);
- bvec[f].bv_page = pkt->pages[p];
- bvec[f].bv_offset = offs;
- } else {
- BUG_ON(bvec[f].bv_offset != offs);
- }
- offs += CD_FRAMESIZE;
- if (offs >= PAGE_SIZE) {
- offs = 0;
- p++;
- }
- }
-}
-
static void pkt_end_io_read(struct bio *bio)
{
struct packet_data *pkt = bio->bi_private;
@@ -1298,7 +1265,6 @@ try_next_bio:
static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
{
int f;
- struct bio_vec *bvec = pkt->w_bio->bi_io_vec;
bio_reset(pkt->w_bio);
pkt->w_bio->bi_iter.bi_sector = pkt->sector;
@@ -1308,9 +1274,10 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
/* XXX: locking? */
for (f = 0; f < pkt->frames; f++) {
- bvec[f].bv_page = pkt->pages[(f * CD_FRAMESIZE) / PAGE_SIZE];
- bvec[f].bv_offset = (f * CD_FRAMESIZE) % PAGE_SIZE;
- if (!bio_add_page(pkt->w_bio, bvec[f].bv_page, CD_FRAMESIZE, bvec[f].bv_offset))
+ struct page *page = pkt->pages[(f * CD_FRAMESIZE) / PAGE_SIZE];
+ unsigned offset = (f * CD_FRAMESIZE) % PAGE_SIZE;
+
+ if (!bio_add_page(pkt->w_bio, page, CD_FRAMESIZE, offset))
BUG();
}
pkt_dbg(2, pd, "vcnt=%d\n", pkt->w_bio->bi_vcnt);
@@ -1327,12 +1294,10 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
pkt_dbg(2, pd, "Writing %d frames for zone %llx\n",
pkt->write_size, (unsigned long long)pkt->sector);
- if (test_bit(PACKET_MERGE_SEGS, &pd->flags) || (pkt->write_size < pkt->frames)) {
- pkt_make_local_copy(pkt, bvec);
+ if (test_bit(PACKET_MERGE_SEGS, &pd->flags) || (pkt->write_size < pkt->frames))
pkt->cache_valid = 1;
- } else {
+ else
pkt->cache_valid = 0;
- }
/* Start the write request */
atomic_set(&pkt->io_wait, 1);
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index 3822eae102db..abf805e332e2 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -36,7 +36,6 @@
#include <linux/scatterlist.h>
#include <linux/version.h>
#include <linux/err.h>
-#include <linux/scatterlist.h>
#include <linux/aer.h>
#include <linux/ctype.h>
#include <linux/wait.h>
@@ -270,8 +269,6 @@ struct skd_device {
resource_size_t mem_phys[SKD_MAX_BARS];
u32 mem_size[SKD_MAX_BARS];
- skd_irq_type_t irq_type;
- u32 msix_count;
struct skd_msix_entry *msix_entries;
struct pci_dev *pdev;
@@ -2138,12 +2135,8 @@ static void skd_send_fitmsg(struct skd_device *skdev,
u8 *bp = (u8 *)skmsg->msg_buf;
int i;
for (i = 0; i < skmsg->length; i += 8) {
- pr_debug("%s:%s:%d msg[%2d] %02x %02x %02x %02x "
- "%02x %02x %02x %02x\n",
- skdev->name, __func__, __LINE__,
- i, bp[i + 0], bp[i + 1], bp[i + 2],
- bp[i + 3], bp[i + 4], bp[i + 5],
- bp[i + 6], bp[i + 7]);
+ pr_debug("%s:%s:%d msg[%2d] %8ph\n",
+ skdev->name, __func__, __LINE__, i, &bp[i]);
if (i == 0)
i = 64 - 8;
}
@@ -2164,7 +2157,6 @@ static void skd_send_fitmsg(struct skd_device *skdev,
qcmd |= FIT_QCMD_MSGSIZE_64;
SKD_WRITEQ(skdev, qcmd, FIT_Q_COMMAND);
-
}
static void skd_send_special_fitmsg(struct skd_device *skdev,
@@ -2177,11 +2169,8 @@ static void skd_send_special_fitmsg(struct skd_device *skdev,
int i;
for (i = 0; i < SKD_N_SPECIAL_FITMSG_BYTES; i += 8) {
- pr_debug("%s:%s:%d spcl[%2d] %02x %02x %02x %02x "
- "%02x %02x %02x %02x\n",
- skdev->name, __func__, __LINE__, i,
- bp[i + 0], bp[i + 1], bp[i + 2], bp[i + 3],
- bp[i + 4], bp[i + 5], bp[i + 6], bp[i + 7]);
+ pr_debug("%s:%s:%d spcl[%2d] %8ph\n",
+ skdev->name, __func__, __LINE__, i, &bp[i]);
if (i == 0)
i = 64 - 8;
}
@@ -2955,8 +2944,8 @@ static void skd_completion_worker(struct work_struct *work)
static void skd_isr_msg_from_dev(struct skd_device *skdev);
-irqreturn_t
-static skd_isr(int irq, void *ptr)
+static irqreturn_t
+skd_isr(int irq, void *ptr)
{
struct skd_device *skdev;
u32 intstat;
@@ -3821,10 +3810,6 @@ static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data)
*/
struct skd_msix_entry {
- int have_irq;
- u32 vector;
- u32 entry;
- struct skd_device *rsp;
char isr_name[30];
};
@@ -3853,193 +3838,121 @@ static struct skd_init_msix_entry msix_entries[SKD_MAX_MSIX_COUNT] = {
{ "(Queue Full 3)", skd_qfull_isr },
};
-static void skd_release_msix(struct skd_device *skdev)
-{
- struct skd_msix_entry *qentry;
- int i;
-
- if (skdev->msix_entries) {
- for (i = 0; i < skdev->msix_count; i++) {
- qentry = &skdev->msix_entries[i];
- skdev = qentry->rsp;
-
- if (qentry->have_irq)
- devm_free_irq(&skdev->pdev->dev,
- qentry->vector, qentry->rsp);
- }
-
- kfree(skdev->msix_entries);
- }
-
- if (skdev->msix_count)
- pci_disable_msix(skdev->pdev);
-
- skdev->msix_count = 0;
- skdev->msix_entries = NULL;
-}
-
static int skd_acquire_msix(struct skd_device *skdev)
{
int i, rc;
struct pci_dev *pdev = skdev->pdev;
- struct msix_entry *entries;
- struct skd_msix_entry *qentry;
-
- entries = kzalloc(sizeof(struct msix_entry) * SKD_MAX_MSIX_COUNT,
- GFP_KERNEL);
- if (!entries)
- return -ENOMEM;
-
- for (i = 0; i < SKD_MAX_MSIX_COUNT; i++)
- entries[i].entry = i;
- rc = pci_enable_msix_exact(pdev, entries, SKD_MAX_MSIX_COUNT);
- if (rc) {
+ rc = pci_alloc_irq_vectors(pdev, SKD_MAX_MSIX_COUNT, SKD_MAX_MSIX_COUNT,
+ PCI_IRQ_MSIX);
+ if (rc < 0) {
pr_err("(%s): failed to enable MSI-X %d\n",
skd_name(skdev), rc);
- goto msix_out;
+ goto out;
}
- skdev->msix_count = SKD_MAX_MSIX_COUNT;
- skdev->msix_entries = kzalloc(sizeof(struct skd_msix_entry) *
- skdev->msix_count, GFP_KERNEL);
+ skdev->msix_entries = kcalloc(SKD_MAX_MSIX_COUNT,
+ sizeof(struct skd_msix_entry), GFP_KERNEL);
if (!skdev->msix_entries) {
rc = -ENOMEM;
pr_err("(%s): msix table allocation error\n",
skd_name(skdev));
- goto msix_out;
- }
-
- for (i = 0; i < skdev->msix_count; i++) {
- qentry = &skdev->msix_entries[i];
- qentry->vector = entries[i].vector;
- qentry->entry = entries[i].entry;
- qentry->rsp = NULL;
- qentry->have_irq = 0;
- pr_debug("%s:%s:%d %s: <%s> msix (%d) vec %d, entry %x\n",
- skdev->name, __func__, __LINE__,
- pci_name(pdev), skdev->name,
- i, qentry->vector, qentry->entry);
+ goto out;
}
/* Enable MSI-X vectors for the base queue */
- for (i = 0; i < skdev->msix_count; i++) {
- qentry = &skdev->msix_entries[i];
+ for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) {
+ struct skd_msix_entry *qentry = &skdev->msix_entries[i];
+
snprintf(qentry->isr_name, sizeof(qentry->isr_name),
"%s%d-msix %s", DRV_NAME, skdev->devno,
msix_entries[i].name);
- rc = devm_request_irq(&skdev->pdev->dev, qentry->vector,
- msix_entries[i].handler, 0,
- qentry->isr_name, skdev);
+
+ rc = devm_request_irq(&skdev->pdev->dev,
+ pci_irq_vector(skdev->pdev, i),
+ msix_entries[i].handler, 0,
+ qentry->isr_name, skdev);
if (rc) {
pr_err("(%s): Unable to register(%d) MSI-X "
"handler %d: %s\n",
skd_name(skdev), rc, i, qentry->isr_name);
goto msix_out;
- } else {
- qentry->have_irq = 1;
- qentry->rsp = skdev;
}
}
+
pr_debug("%s:%s:%d %s: <%s> msix %d irq(s) enabled\n",
skdev->name, __func__, __LINE__,
- pci_name(pdev), skdev->name, skdev->msix_count);
+ pci_name(pdev), skdev->name, SKD_MAX_MSIX_COUNT);
return 0;
msix_out:
- if (entries)
- kfree(entries);
- skd_release_msix(skdev);
+ while (--i >= 0)
+ devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), skdev);
+out:
+ kfree(skdev->msix_entries);
+ skdev->msix_entries = NULL;
return rc;
}
static int skd_acquire_irq(struct skd_device *skdev)
{
+ struct pci_dev *pdev = skdev->pdev;
+ unsigned int irq_flag = PCI_IRQ_LEGACY;
int rc;
- struct pci_dev *pdev;
-
- pdev = skdev->pdev;
- skdev->msix_count = 0;
-RETRY_IRQ_TYPE:
- switch (skdev->irq_type) {
- case SKD_IRQ_MSIX:
+ if (skd_isr_type == SKD_IRQ_MSIX) {
rc = skd_acquire_msix(skdev);
if (!rc)
- pr_info("(%s): MSI-X %d irqs enabled\n",
- skd_name(skdev), skdev->msix_count);
- else {
- pr_err(
- "(%s): failed to enable MSI-X, re-trying with MSI %d\n",
- skd_name(skdev), rc);
- skdev->irq_type = SKD_IRQ_MSI;
- goto RETRY_IRQ_TYPE;
- }
- break;
- case SKD_IRQ_MSI:
- snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d-msi",
- DRV_NAME, skdev->devno);
- rc = pci_enable_msi_range(pdev, 1, 1);
- if (rc > 0) {
- rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, 0,
- skdev->isr_name, skdev);
- if (rc) {
- pci_disable_msi(pdev);
- pr_err(
- "(%s): failed to allocate the MSI interrupt %d\n",
- skd_name(skdev), rc);
- goto RETRY_IRQ_LEGACY;
- }
- pr_info("(%s): MSI irq %d enabled\n",
- skd_name(skdev), pdev->irq);
- } else {
-RETRY_IRQ_LEGACY:
- pr_err(
- "(%s): failed to enable MSI, re-trying with LEGACY %d\n",
- skd_name(skdev), rc);
- skdev->irq_type = SKD_IRQ_LEGACY;
- goto RETRY_IRQ_TYPE;
- }
- break;
- case SKD_IRQ_LEGACY:
- snprintf(skdev->isr_name, sizeof(skdev->isr_name),
- "%s%d-legacy", DRV_NAME, skdev->devno);
- rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr,
- IRQF_SHARED, skdev->isr_name, skdev);
- if (!rc)
- pr_info("(%s): LEGACY irq %d enabled\n",
- skd_name(skdev), pdev->irq);
- else
- pr_err("(%s): request LEGACY irq error %d\n",
- skd_name(skdev), rc);
- break;
- default:
- pr_info("(%s): irq_type %d invalid, re-set to %d\n",
- skd_name(skdev), skdev->irq_type, SKD_IRQ_DEFAULT);
- skdev->irq_type = SKD_IRQ_LEGACY;
- goto RETRY_IRQ_TYPE;
+ return 0;
+
+ pr_err("(%s): failed to enable MSI-X, re-trying with MSI %d\n",
+ skd_name(skdev), rc);
}
- return rc;
+
+ snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d", DRV_NAME,
+ skdev->devno);
+
+ if (skd_isr_type != SKD_IRQ_LEGACY)
+ irq_flag |= PCI_IRQ_MSI;
+ rc = pci_alloc_irq_vectors(pdev, 1, 1, irq_flag);
+ if (rc < 0) {
+ pr_err("(%s): failed to allocate the MSI interrupt %d\n",
+ skd_name(skdev), rc);
+ return rc;
+ }
+
+ rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr,
+ pdev->msi_enabled ? 0 : IRQF_SHARED,
+ skdev->isr_name, skdev);
+ if (rc) {
+ pci_free_irq_vectors(pdev);
+ pr_err("(%s): failed to allocate interrupt %d\n",
+ skd_name(skdev), rc);
+ return rc;
+ }
+
+ return 0;
}
static void skd_release_irq(struct skd_device *skdev)
{
- switch (skdev->irq_type) {
- case SKD_IRQ_MSIX:
- skd_release_msix(skdev);
- break;
- case SKD_IRQ_MSI:
- devm_free_irq(&skdev->pdev->dev, skdev->pdev->irq, skdev);
- pci_disable_msi(skdev->pdev);
- break;
- case SKD_IRQ_LEGACY:
- devm_free_irq(&skdev->pdev->dev, skdev->pdev->irq, skdev);
- break;
- default:
- pr_err("(%s): wrong irq type %d!",
- skd_name(skdev), skdev->irq_type);
- break;
+ struct pci_dev *pdev = skdev->pdev;
+
+ if (skdev->msix_entries) {
+ int i;
+
+ for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) {
+ devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i),
+ skdev);
+ }
+
+ kfree(skdev->msix_entries);
+ skdev->msix_entries = NULL;
+ } else {
+ devm_free_irq(&pdev->dev, pdev->irq, skdev);
}
+
+ pci_free_irq_vectors(pdev);
}
/*
@@ -4402,7 +4315,6 @@ static struct skd_device *skd_construct(struct pci_dev *pdev)
skdev->pdev = pdev;
skdev->devno = skd_next_devno++;
skdev->major = blk_major;
- skdev->irq_type = skd_isr_type;
sprintf(skdev->name, DRV_NAME "%d", skdev->devno);
skdev->dev_max_queue_depth = 0;
diff --git a/drivers/block/umem.c b/drivers/block/umem.c
index be90e15854ed..46f4c719fed9 100644
--- a/drivers/block/umem.c
+++ b/drivers/block/umem.c
@@ -535,7 +535,7 @@ static blk_qc_t mm_make_request(struct request_queue *q, struct bio *bio)
*card->biotail = bio;
bio->bi_next = NULL;
card->biotail = &bio->bi_next;
- if (bio->bi_opf & REQ_SYNC || !mm_check_plugged(card))
+ if (op_is_sync(bio->bi_opf) || !mm_check_plugged(card))
activate(card);
spin_unlock_irq(&card->lock);
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index 4a80ee752597..726c32e35db9 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -1253,14 +1253,14 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
case BLKIF_OP_WRITE:
ring->st_wr_req++;
operation = REQ_OP_WRITE;
- operation_flags = WRITE_ODIRECT;
+ operation_flags = REQ_SYNC | REQ_IDLE;
break;
case BLKIF_OP_WRITE_BARRIER:
drain = true;
case BLKIF_OP_FLUSH_DISKCACHE:
ring->st_f_req++;
operation = REQ_OP_WRITE;
- operation_flags = WRITE_FLUSH;
+ operation_flags = REQ_PREFLUSH;
break;
default:
operation = 0; /* make gcc happy */
@@ -1272,7 +1272,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
nseg = req->operation == BLKIF_OP_INDIRECT ?
req->u.indirect.nr_segments : req->u.rw.nr_segments;
- if (unlikely(nseg == 0 && operation_flags != WRITE_FLUSH) ||
+ if (unlikely(nseg == 0 && operation_flags != REQ_PREFLUSH) ||
unlikely((req->operation != BLKIF_OP_INDIRECT) &&
(nseg > BLKIF_MAX_SEGMENTS_PER_REQUEST)) ||
unlikely((req->operation == BLKIF_OP_INDIRECT) &&
@@ -1334,7 +1334,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
}
/* Wait on all outstanding I/O's and once that has been completed
- * issue the WRITE_FLUSH.
+ * issue the flush.
*/
if (drain)
xen_blk_drain_io(pending_req->ring);
@@ -1380,7 +1380,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
/* This will be hit if the operation was a flush or discard. */
if (!bio) {
- BUG_ON(operation_flags != WRITE_FLUSH);
+ BUG_ON(operation_flags != REQ_PREFLUSH);
bio = bio_alloc(GFP_KERNEL, 0);
if (unlikely(bio == NULL))
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 3cc6d1d86f1e..415e79b69d34 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -533,13 +533,11 @@ static void xen_blkbk_discard(struct xenbus_transaction xbt, struct backend_info
struct xenbus_device *dev = be->dev;
struct xen_blkif *blkif = be->blkif;
int err;
- int state = 0, discard_enable;
+ int state = 0;
struct block_device *bdev = be->blkif->vbd.bdev;
struct request_queue *q = bdev_get_queue(bdev);
- err = xenbus_scanf(XBT_NIL, dev->nodename, "discard-enable", "%d",
- &discard_enable);
- if (err == 1 && !discard_enable)
+ if (!xenbus_read_unsigned(dev->nodename, "discard-enable", 1))
return;
if (blk_queue_discard(q)) {
@@ -1039,30 +1037,24 @@ static int connect_ring(struct backend_info *be)
xenbus_dev_fatal(dev, err, "unknown fe protocol %s", protocol);
return -ENOSYS;
}
- err = xenbus_scanf(XBT_NIL, dev->otherend,
- "feature-persistent", "%u", &pers_grants);
- if (err <= 0)
- pers_grants = 0;
-
+ pers_grants = xenbus_read_unsigned(dev->otherend, "feature-persistent",
+ 0);
be->blkif->vbd.feature_gnt_persistent = pers_grants;
be->blkif->vbd.overflow_max_grants = 0;
/*
* Read the number of hardware queues from frontend.
*/
- err = xenbus_scanf(XBT_NIL, dev->otherend, "multi-queue-num-queues",
- "%u", &requested_num_queues);
- if (err < 0) {
- requested_num_queues = 1;
- } else {
- if (requested_num_queues > xenblk_max_queues
- || requested_num_queues == 0) {
- /* Buggy or malicious guest. */
- xenbus_dev_fatal(dev, err,
- "guest requested %u queues, exceeding the maximum of %u.",
- requested_num_queues, xenblk_max_queues);
- return -ENOSYS;
- }
+ requested_num_queues = xenbus_read_unsigned(dev->otherend,
+ "multi-queue-num-queues",
+ 1);
+ if (requested_num_queues > xenblk_max_queues
+ || requested_num_queues == 0) {
+ /* Buggy or malicious guest. */
+ xenbus_dev_fatal(dev, err,
+ "guest requested %u queues, exceeding the maximum of %u.",
+ requested_num_queues, xenblk_max_queues);
+ return -ENOSYS;
}
be->blkif->nr_rings = requested_num_queues;
if (xen_blkif_alloc_rings(be->blkif))
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 9908597c5209..b2bdfa81f929 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1758,17 +1758,13 @@ static int talk_to_blkback(struct xenbus_device *dev,
const char *message = NULL;
struct xenbus_transaction xbt;
int err;
- unsigned int i, max_page_order = 0;
- unsigned int ring_page_order = 0;
+ unsigned int i, max_page_order;
+ unsigned int ring_page_order;
- err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "max-ring-page-order", "%u", &max_page_order);
- if (err != 1)
- info->nr_ring_pages = 1;
- else {
- ring_page_order = min(xen_blkif_max_ring_order, max_page_order);
- info->nr_ring_pages = 1 << ring_page_order;
- }
+ max_page_order = xenbus_read_unsigned(info->xbdev->otherend,
+ "max-ring-page-order", 0);
+ ring_page_order = min(xen_blkif_max_ring_order, max_page_order);
+ info->nr_ring_pages = 1 << ring_page_order;
for (i = 0; i < info->nr_rings; i++) {
struct blkfront_ring_info *rinfo = &info->rinfo[i];
@@ -1877,18 +1873,14 @@ again:
static int negotiate_mq(struct blkfront_info *info)
{
- unsigned int backend_max_queues = 0;
- int err;
+ unsigned int backend_max_queues;
unsigned int i;
BUG_ON(info->nr_rings);
/* Check if backend supports multiple queues. */
- err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "multi-queue-max-queues", "%u", &backend_max_queues);
- if (err < 0)
- backend_max_queues = 1;
-
+ backend_max_queues = xenbus_read_unsigned(info->xbdev->otherend,
+ "multi-queue-max-queues", 1);
info->nr_rings = min(backend_max_queues, xen_blkif_max_queues);
/* We need at least one ring. */
if (!info->nr_rings)
@@ -2043,8 +2035,9 @@ static int blkif_recover(struct blkfront_info *info)
/* Requeue pending requests (flush or discard) */
list_del_init(&req->queuelist);
BUG_ON(req->nr_phys_segments > segs);
- blk_mq_requeue_request(req);
+ blk_mq_requeue_request(req, false);
}
+ blk_mq_start_stopped_hw_queues(info->rq, true);
blk_mq_kick_requeue_list(info->rq);
while ((bio = bio_list_pop(&info->bio_list)) != NULL) {
@@ -2195,7 +2188,6 @@ static void blkfront_setup_discard(struct blkfront_info *info)
int err;
unsigned int discard_granularity;
unsigned int discard_alignment;
- unsigned int discard_secure;
info->feature_discard = 1;
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
@@ -2206,10 +2198,9 @@ static void blkfront_setup_discard(struct blkfront_info *info)
info->discard_granularity = discard_granularity;
info->discard_alignment = discard_alignment;
}
- err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "discard-secure", "%u", &discard_secure);
- if (err > 0)
- info->feature_secdiscard = !!discard_secure;
+ info->feature_secdiscard =
+ !!xenbus_read_unsigned(info->xbdev->otherend, "discard-secure",
+ 0);
}
static int blkfront_setup_indirect(struct blkfront_ring_info *rinfo)
@@ -2301,16 +2292,11 @@ out_of_memory:
*/
static void blkfront_gather_backend_features(struct blkfront_info *info)
{
- int err;
- int barrier, flush, discard, persistent;
unsigned int indirect_segments;
info->feature_flush = 0;
info->feature_fua = 0;
- err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "feature-barrier", "%d", &barrier);
-
/*
* If there's no "feature-barrier" defined, then it means
* we're dealing with a very old backend which writes
@@ -2318,7 +2304,7 @@ static void blkfront_gather_backend_features(struct blkfront_info *info)
*
* If there are barriers, then we use flush.
*/
- if (err > 0 && barrier) {
+ if (xenbus_read_unsigned(info->xbdev->otherend, "feature-barrier", 0)) {
info->feature_flush = 1;
info->feature_fua = 1;
}
@@ -2327,35 +2313,23 @@ static void blkfront_gather_backend_features(struct blkfront_info *info)
* And if there is "feature-flush-cache" use that above
* barriers.
*/
- err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "feature-flush-cache", "%d", &flush);
-
- if (err > 0 && flush) {
+ if (xenbus_read_unsigned(info->xbdev->otherend, "feature-flush-cache",
+ 0)) {
info->feature_flush = 1;
info->feature_fua = 0;
}
- err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "feature-discard", "%d", &discard);
-
- if (err > 0 && discard)
+ if (xenbus_read_unsigned(info->xbdev->otherend, "feature-discard", 0))
blkfront_setup_discard(info);
- err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "feature-persistent", "%d", &persistent);
- if (err <= 0)
- info->feature_persistent = 0;
- else
- info->feature_persistent = persistent;
+ info->feature_persistent =
+ xenbus_read_unsigned(info->xbdev->otherend,
+ "feature-persistent", 0);
- err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "feature-max-indirect-segments", "%u",
- &indirect_segments);
- if (err <= 0)
- info->max_indirect_segments = 0;
- else
- info->max_indirect_segments = min(indirect_segments,
- xen_blkif_max_segments);
+ indirect_segments = xenbus_read_unsigned(info->xbdev->otherend,
+ "feature-max-indirect-segments", 0);
+ info->max_indirect_segments = min(indirect_segments,
+ xen_blkif_max_segments);
}
/*
@@ -2420,11 +2394,9 @@ static void blkfront_connect(struct blkfront_info *info)
* provide this. Assume physical sector size to be the same as
* sector_size in that case.
*/
- err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "physical-sector-size", "%u", &physical_sector_size);
- if (err != 1)
- physical_sector_size = sector_size;
-
+ physical_sector_size = xenbus_read_unsigned(info->xbdev->otherend,
+ "physical-sector-size",
+ sector_size);
blkfront_gather_backend_features(info);
for (i = 0; i < info->nr_rings; i++) {
err = blkfront_setup_indirect(&info->rinfo[i]);
diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c
index 4b5cd3a7b2b6..12046f4f00e4 100644
--- a/drivers/block/zram/zcomp.c
+++ b/drivers/block/zram/zcomp.c
@@ -160,82 +160,56 @@ int zcomp_decompress(struct zcomp_strm *zstrm,
dst, &dst_len);
}
-static int __zcomp_cpu_notifier(struct zcomp *comp,
- unsigned long action, unsigned long cpu)
+int zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node)
{
+ struct zcomp *comp = hlist_entry(node, struct zcomp, node);
struct zcomp_strm *zstrm;
- switch (action) {
- case CPU_UP_PREPARE:
- if (WARN_ON(*per_cpu_ptr(comp->stream, cpu)))
- break;
- zstrm = zcomp_strm_alloc(comp);
- if (IS_ERR_OR_NULL(zstrm)) {
- pr_err("Can't allocate a compression stream\n");
- return NOTIFY_BAD;
- }
- *per_cpu_ptr(comp->stream, cpu) = zstrm;
- break;
- case CPU_DEAD:
- case CPU_UP_CANCELED:
- zstrm = *per_cpu_ptr(comp->stream, cpu);
- if (!IS_ERR_OR_NULL(zstrm))
- zcomp_strm_free(zstrm);
- *per_cpu_ptr(comp->stream, cpu) = NULL;
- break;
- default:
- break;
+ if (WARN_ON(*per_cpu_ptr(comp->stream, cpu)))
+ return 0;
+
+ zstrm = zcomp_strm_alloc(comp);
+ if (IS_ERR_OR_NULL(zstrm)) {
+ pr_err("Can't allocate a compression stream\n");
+ return -ENOMEM;
}
- return NOTIFY_OK;
+ *per_cpu_ptr(comp->stream, cpu) = zstrm;
+ return 0;
}
-static int zcomp_cpu_notifier(struct notifier_block *nb,
- unsigned long action, void *pcpu)
+int zcomp_cpu_dead(unsigned int cpu, struct hlist_node *node)
{
- unsigned long cpu = (unsigned long)pcpu;
- struct zcomp *comp = container_of(nb, typeof(*comp), notifier);
+ struct zcomp *comp = hlist_entry(node, struct zcomp, node);
+ struct zcomp_strm *zstrm;
- return __zcomp_cpu_notifier(comp, action, cpu);
+ zstrm = *per_cpu_ptr(comp->stream, cpu);
+ if (!IS_ERR_OR_NULL(zstrm))
+ zcomp_strm_free(zstrm);
+ *per_cpu_ptr(comp->stream, cpu) = NULL;
+ return 0;
}
static int zcomp_init(struct zcomp *comp)
{
- unsigned long cpu;
int ret;
- comp->notifier.notifier_call = zcomp_cpu_notifier;
-
comp->stream = alloc_percpu(struct zcomp_strm *);
if (!comp->stream)
return -ENOMEM;
- cpu_notifier_register_begin();
- for_each_online_cpu(cpu) {
- ret = __zcomp_cpu_notifier(comp, CPU_UP_PREPARE, cpu);
- if (ret == NOTIFY_BAD)
- goto cleanup;
- }
- __register_cpu_notifier(&comp->notifier);
- cpu_notifier_register_done();
+ ret = cpuhp_state_add_instance(CPUHP_ZCOMP_PREPARE, &comp->node);
+ if (ret < 0)
+ goto cleanup;
return 0;
cleanup:
- for_each_online_cpu(cpu)
- __zcomp_cpu_notifier(comp, CPU_UP_CANCELED, cpu);
- cpu_notifier_register_done();
- return -ENOMEM;
+ free_percpu(comp->stream);
+ return ret;
}
void zcomp_destroy(struct zcomp *comp)
{
- unsigned long cpu;
-
- cpu_notifier_register_begin();
- for_each_online_cpu(cpu)
- __zcomp_cpu_notifier(comp, CPU_UP_CANCELED, cpu);
- __unregister_cpu_notifier(&comp->notifier);
- cpu_notifier_register_done();
-
+ cpuhp_state_remove_instance(CPUHP_ZCOMP_PREPARE, &comp->node);
free_percpu(comp->stream);
kfree(comp);
}
diff --git a/drivers/block/zram/zcomp.h b/drivers/block/zram/zcomp.h
index 478cac2ed465..41c1002a7d7d 100644
--- a/drivers/block/zram/zcomp.h
+++ b/drivers/block/zram/zcomp.h
@@ -19,11 +19,12 @@ struct zcomp_strm {
/* dynamic per-device compression frontend */
struct zcomp {
struct zcomp_strm * __percpu *stream;
- struct notifier_block notifier;
-
const char *name;
+ struct hlist_node node;
};
+int zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node);
+int zcomp_cpu_dead(unsigned int cpu, struct hlist_node *node);
ssize_t zcomp_available_show(const char *comp, char *buf);
bool zcomp_available_algorithm(const char *comp);
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 04365b17ee67..15f58ab44d0b 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -30,6 +30,7 @@
#include <linux/err.h>
#include <linux/idr.h>
#include <linux/sysfs.h>
+#include <linux/cpuhotplug.h>
#include "zram_drv.h"
@@ -1403,7 +1404,8 @@ static ssize_t hot_remove_store(struct class *class,
zram = idr_find(&zram_index_idr, dev_id);
if (zram) {
ret = zram_remove(zram);
- idr_remove(&zram_index_idr, dev_id);
+ if (!ret)
+ idr_remove(&zram_index_idr, dev_id);
} else {
ret = -ENODEV;
}
@@ -1412,8 +1414,14 @@ static ssize_t hot_remove_store(struct class *class,
return ret ? ret : count;
}
+/*
+ * NOTE: hot_add attribute is not the usual read-only sysfs attribute. In a
+ * sense that reading from this file does alter the state of your system -- it
+ * creates a new un-initialized zram device and returns back this device's
+ * device_id (or an error code if it fails to create a new device).
+ */
static struct class_attribute zram_control_class_attrs[] = {
- __ATTR_RO(hot_add),
+ __ATTR(hot_add, 0400, hot_add_show, NULL),
__ATTR_WO(hot_remove),
__ATTR_NULL,
};
@@ -1436,15 +1444,22 @@ static void destroy_devices(void)
idr_for_each(&zram_index_idr, &zram_remove_cb, NULL);
idr_destroy(&zram_index_idr);
unregister_blkdev(zram_major, "zram");
+ cpuhp_remove_multi_state(CPUHP_ZCOMP_PREPARE);
}
static int __init zram_init(void)
{
int ret;
+ ret = cpuhp_setup_state_multi(CPUHP_ZCOMP_PREPARE, "block/zram:prepare",
+ zcomp_cpu_up_prepare, zcomp_cpu_dead);
+ if (ret < 0)
+ return ret;
+
ret = class_register(&zram_control_class);
if (ret) {
pr_err("Unable to register zram-control class\n");
+ cpuhp_remove_multi_state(CPUHP_ZCOMP_PREPARE);
return ret;
}
@@ -1452,6 +1467,7 @@ static int __init zram_init(void)
if (zram_major <= 0) {
pr_err("Unable to get major number\n");
class_unregister(&zram_control_class);
+ cpuhp_remove_multi_state(CPUHP_ZCOMP_PREPARE);
return -EBUSY;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 18:00:06 +0100