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-rw-r--r--Documentation/blockdev/nbd.txt48
-rw-r--r--MAINTAINERS2
-rw-r--r--drivers/block/drbd/drbd_main.c7
-rw-r--r--drivers/block/drbd/drbd_req.c3
-rw-r--r--drivers/block/nbd.c140
-rw-r--r--drivers/block/nvme-core.c159
-rw-r--r--drivers/block/nvme-scsi.c28
-rw-r--r--drivers/block/xen-blkback/blkback.c62
-rw-r--r--drivers/block/xen-blkback/common.h6
-rw-r--r--drivers/block/xen-blkback/xenbus.c38
-rw-r--r--include/linux/nbd.h46
-rw-r--r--include/linux/nvme.h5
12 files changed, 242 insertions, 302 deletions
diff --git a/Documentation/blockdev/nbd.txt b/Documentation/blockdev/nbd.txt
index 271e607304da..db242ea2bce8 100644
--- a/Documentation/blockdev/nbd.txt
+++ b/Documentation/blockdev/nbd.txt
@@ -1,17 +1,31 @@
- Network Block Device (TCP version)
-
- What is it: With this compiled in the kernel (or as a module), Linux
- can use a remote server as one of its block devices. So every time
- the client computer wants to read, e.g., /dev/nb0, it sends a
- request over TCP to the server, which will reply with the data read.
- This can be used for stations with low disk space (or even diskless)
- to borrow disk space from another computer.
- Unlike NFS, it is possible to put any filesystem on it, etc.
-
- For more information, or to download the nbd-client and nbd-server
- tools, go to http://nbd.sf.net/.
-
- The nbd kernel module need only be installed on the client
- system, as the nbd-server is completely in userspace. In fact,
- the nbd-server has been successfully ported to other operating
- systems, including Windows.
+Network Block Device (TCP version)
+==================================
+
+1) Overview
+-----------
+
+What is it: With this compiled in the kernel (or as a module), Linux
+can use a remote server as one of its block devices. So every time
+the client computer wants to read, e.g., /dev/nb0, it sends a
+request over TCP to the server, which will reply with the data read.
+This can be used for stations with low disk space (or even diskless)
+to borrow disk space from another computer.
+Unlike NFS, it is possible to put any filesystem on it, etc.
+
+For more information, or to download the nbd-client and nbd-server
+tools, go to http://nbd.sf.net/.
+
+The nbd kernel module need only be installed on the client
+system, as the nbd-server is completely in userspace. In fact,
+the nbd-server has been successfully ported to other operating
+systems, including Windows.
+
+A) NBD parameters
+-----------------
+
+max_part
+ Number of partitions per device (default: 0).
+
+nbds_max
+ Number of block devices that should be initialized (default: 16).
+
diff --git a/MAINTAINERS b/MAINTAINERS
index f40881b5ad20..bf990f53eec3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8107,7 +8107,7 @@ S: Maintained
F: drivers/net/wireless/rt2x00/
RAMDISK RAM BLOCK DEVICE DRIVER
-M: Nick Piggin <npiggin@kernel.dk>
+M: Jens Axboe <axboe@kernel.dk>
S: Maintained
F: Documentation/blockdev/ramdisk.txt
F: drivers/block/brd.c
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 1fc83427199c..81fde9ef7f8e 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2107,13 +2107,12 @@ static int drbd_create_mempools(void)
if (drbd_md_io_page_pool == NULL)
goto Enomem;
- drbd_request_mempool = mempool_create(number,
- mempool_alloc_slab, mempool_free_slab, drbd_request_cache);
+ drbd_request_mempool = mempool_create_slab_pool(number,
+ drbd_request_cache);
if (drbd_request_mempool == NULL)
goto Enomem;
- drbd_ee_mempool = mempool_create(number,
- mempool_alloc_slab, mempool_free_slab, drbd_ee_cache);
+ drbd_ee_mempool = mempool_create_slab_pool(number, drbd_ee_cache);
if (drbd_ee_mempool == NULL)
goto Enomem;
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 34f2f0ba409b..3907202fb9d9 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -52,9 +52,10 @@ static struct drbd_request *drbd_req_new(struct drbd_device *device,
{
struct drbd_request *req;
- req = mempool_alloc(drbd_request_mempool, GFP_NOIO | __GFP_ZERO);
+ req = mempool_alloc(drbd_request_mempool, GFP_NOIO);
if (!req)
return NULL;
+ memset(req, 0, sizeof(*req));
drbd_req_make_private_bio(req, bio_src);
req->rq_state = bio_data_dir(bio_src) == WRITE ? RQ_WRITE : 0;
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index a98c41f72c63..39e5f7fae3ef 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -32,28 +32,36 @@
#include <net/sock.h>
#include <linux/net.h>
#include <linux/kthread.h>
+#include <linux/types.h>
#include <asm/uaccess.h>
#include <asm/types.h>
#include <linux/nbd.h>
-#define NBD_MAGIC 0x68797548
+struct nbd_device {
+ int flags;
+ int harderror; /* Code of hard error */
+ struct socket * sock; /* If == NULL, device is not ready, yet */
+ int magic;
+
+ spinlock_t queue_lock;
+ struct list_head queue_head; /* Requests waiting result */
+ struct request *active_req;
+ wait_queue_head_t active_wq;
+ struct list_head waiting_queue; /* Requests to be sent */
+ wait_queue_head_t waiting_wq;
+
+ struct mutex tx_lock;
+ struct gendisk *disk;
+ int blksize;
+ loff_t bytesize;
+ pid_t pid; /* pid of nbd-client, if attached */
+ int xmit_timeout;
+ int disconnect; /* a disconnect has been requested by user */
+};
-#ifdef NDEBUG
-#define dprintk(flags, fmt...)
-#else /* NDEBUG */
-#define dprintk(flags, fmt...) do { \
- if (debugflags & (flags)) printk(KERN_DEBUG fmt); \
-} while (0)
-#define DBG_IOCTL 0x0004
-#define DBG_INIT 0x0010
-#define DBG_EXIT 0x0020
-#define DBG_BLKDEV 0x0100
-#define DBG_RX 0x0200
-#define DBG_TX 0x0400
-static unsigned int debugflags;
-#endif /* NDEBUG */
+#define NBD_MAGIC 0x68797548
static unsigned int nbds_max = 16;
static struct nbd_device *nbd_dev;
@@ -71,25 +79,9 @@ static int max_part;
*/
static DEFINE_SPINLOCK(nbd_lock);
-#ifndef NDEBUG
-static const char *ioctl_cmd_to_ascii(int cmd)
+static inline struct device *nbd_to_dev(struct nbd_device *nbd)
{
- switch (cmd) {
- case NBD_SET_SOCK: return "set-sock";
- case NBD_SET_BLKSIZE: return "set-blksize";
- case NBD_SET_SIZE: return "set-size";
- case NBD_SET_TIMEOUT: return "set-timeout";
- case NBD_SET_FLAGS: return "set-flags";
- case NBD_DO_IT: return "do-it";
- case NBD_CLEAR_SOCK: return "clear-sock";
- case NBD_CLEAR_QUE: return "clear-que";
- case NBD_PRINT_DEBUG: return "print-debug";
- case NBD_SET_SIZE_BLOCKS: return "set-size-blocks";
- case NBD_DISCONNECT: return "disconnect";
- case BLKROSET: return "set-read-only";
- case BLKFLSBUF: return "flush-buffer-cache";
- }
- return "unknown";
+ return disk_to_dev(nbd->disk);
}
static const char *nbdcmd_to_ascii(int cmd)
@@ -103,30 +95,26 @@ static const char *nbdcmd_to_ascii(int cmd)
}
return "invalid";
}
-#endif /* NDEBUG */
-static void nbd_end_request(struct request *req)
+static void nbd_end_request(struct nbd_device *nbd, struct request *req)
{
int error = req->errors ? -EIO : 0;
struct request_queue *q = req->q;
unsigned long flags;
- dprintk(DBG_BLKDEV, "%s: request %p: %s\n", req->rq_disk->disk_name,
- req, error ? "failed" : "done");
+ dev_dbg(nbd_to_dev(nbd), "request %p: %s\n", req,
+ error ? "failed" : "done");
spin_lock_irqsave(q->queue_lock, flags);
__blk_end_request_all(req, error);
spin_unlock_irqrestore(q->queue_lock, flags);
}
+/*
+ * Forcibly shutdown the socket causing all listeners to error
+ */
static void sock_shutdown(struct nbd_device *nbd, int lock)
{
- /* Forcibly shutdown the socket causing all listeners
- * to error
- *
- * FIXME: This code is duplicated from sys_shutdown, but
- * there should be a more generic interface rather than
- * calling socket ops directly here */
if (lock)
mutex_lock(&nbd->tx_lock);
if (nbd->sock) {
@@ -253,17 +241,15 @@ static int nbd_send_req(struct nbd_device *nbd, struct request *req)
}
memcpy(request.handle, &req, sizeof(req));
- dprintk(DBG_TX, "%s: request %p: sending control (%s@%llu,%uB)\n",
- nbd->disk->disk_name, req,
- nbdcmd_to_ascii(nbd_cmd(req)),
- (unsigned long long)blk_rq_pos(req) << 9,
- blk_rq_bytes(req));
+ dev_dbg(nbd_to_dev(nbd), "request %p: sending control (%s@%llu,%uB)\n",
+ req, nbdcmd_to_ascii(nbd_cmd(req)),
+ (unsigned long long)blk_rq_pos(req) << 9, blk_rq_bytes(req));
result = sock_xmit(nbd, 1, &request, sizeof(request),
(nbd_cmd(req) == NBD_CMD_WRITE) ? MSG_MORE : 0);
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk),
"Send control failed (result %d)\n", result);
- goto error_out;
+ return -EIO;
}
if (nbd_cmd(req) == NBD_CMD_WRITE) {
@@ -277,21 +263,18 @@ static int nbd_send_req(struct nbd_device *nbd, struct request *req)
flags = 0;
if (!rq_iter_last(bvec, iter))
flags = MSG_MORE;
- dprintk(DBG_TX, "%s: request %p: sending %d bytes data\n",
- nbd->disk->disk_name, req, bvec.bv_len);
+ dev_dbg(nbd_to_dev(nbd), "request %p: sending %d bytes data\n",
+ req, bvec.bv_len);
result = sock_send_bvec(nbd, &bvec, flags);
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk),
"Send data failed (result %d)\n",
result);
- goto error_out;
+ return -EIO;
}
}
}
return 0;
-
-error_out:
- return -EIO;
}
static struct request *nbd_find_request(struct nbd_device *nbd,
@@ -302,7 +285,7 @@ static struct request *nbd_find_request(struct nbd_device *nbd,
err = wait_event_interruptible(nbd->active_wq, nbd->active_req != xreq);
if (unlikely(err))
- goto out;
+ return ERR_PTR(err);
spin_lock(&nbd->queue_lock);
list_for_each_entry_safe(req, tmp, &nbd->queue_head, queuelist) {
@@ -314,10 +297,7 @@ static struct request *nbd_find_request(struct nbd_device *nbd,
}
spin_unlock(&nbd->queue_lock);
- err = -ENOENT;
-
-out:
- return ERR_PTR(err);
+ return ERR_PTR(-ENOENT);
}
static inline int sock_recv_bvec(struct nbd_device *nbd, struct bio_vec *bvec)
@@ -371,8 +351,7 @@ static struct request *nbd_read_stat(struct nbd_device *nbd)
return req;
}
- dprintk(DBG_RX, "%s: request %p: got reply\n",
- nbd->disk->disk_name, req);
+ dev_dbg(nbd_to_dev(nbd), "request %p: got reply\n", req);
if (nbd_cmd(req) == NBD_CMD_READ) {
struct req_iterator iter;
struct bio_vec bvec;
@@ -385,8 +364,8 @@ static struct request *nbd_read_stat(struct nbd_device *nbd)
req->errors++;
return req;
}
- dprintk(DBG_RX, "%s: request %p: got %d bytes data\n",
- nbd->disk->disk_name, req, bvec.bv_len);
+ dev_dbg(nbd_to_dev(nbd), "request %p: got %d bytes data\n",
+ req, bvec.bv_len);
}
}
return req;
@@ -426,7 +405,7 @@ static int nbd_do_it(struct nbd_device *nbd)
}
while ((req = nbd_read_stat(nbd)) != NULL)
- nbd_end_request(req);
+ nbd_end_request(nbd, req);
device_remove_file(disk_to_dev(nbd->disk), &pid_attr);
nbd->pid = 0;
@@ -455,7 +434,7 @@ static void nbd_clear_que(struct nbd_device *nbd)
queuelist);
list_del_init(&req->queuelist);
req->errors++;
- nbd_end_request(req);
+ nbd_end_request(nbd, req);
}
while (!list_empty(&nbd->waiting_queue)) {
@@ -463,7 +442,7 @@ static void nbd_clear_que(struct nbd_device *nbd)
queuelist);
list_del_init(&req->queuelist);
req->errors++;
- nbd_end_request(req);
+ nbd_end_request(nbd, req);
}
}
@@ -507,7 +486,7 @@ static void nbd_handle_req(struct nbd_device *nbd, struct request *req)
if (nbd_send_req(nbd, req) != 0) {
dev_err(disk_to_dev(nbd->disk), "Request send failed\n");
req->errors++;
- nbd_end_request(req);
+ nbd_end_request(nbd, req);
} else {
spin_lock(&nbd->queue_lock);
list_add_tail(&req->queuelist, &nbd->queue_head);
@@ -522,7 +501,7 @@ static void nbd_handle_req(struct nbd_device *nbd, struct request *req)
error_out:
req->errors++;
- nbd_end_request(req);
+ nbd_end_request(nbd, req);
}
static int nbd_thread(void *data)
@@ -570,18 +549,18 @@ static void do_nbd_request(struct request_queue *q)
spin_unlock_irq(q->queue_lock);
- dprintk(DBG_BLKDEV, "%s: request %p: dequeued (flags=%x)\n",
- req->rq_disk->disk_name, req, req->cmd_type);
-
nbd = req->rq_disk->private_data;
BUG_ON(nbd->magic != NBD_MAGIC);
+ dev_dbg(nbd_to_dev(nbd), "request %p: dequeued (flags=%x)\n",
+ req, req->cmd_type);
+
if (unlikely(!nbd->sock)) {
dev_err(disk_to_dev(nbd->disk),
"Attempted send on closed socket\n");
req->errors++;
- nbd_end_request(req);
+ nbd_end_request(nbd, req);
spin_lock_irq(q->queue_lock);
continue;
}
@@ -706,13 +685,13 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
else
blk_queue_flush(nbd->disk->queue, 0);
- thread = kthread_create(nbd_thread, nbd, "%s",
- nbd->disk->disk_name);
+ thread = kthread_run(nbd_thread, nbd, "%s",
+ nbd->disk->disk_name);
if (IS_ERR(thread)) {
mutex_lock(&nbd->tx_lock);
return PTR_ERR(thread);
}
- wake_up_process(thread);
+
error = nbd_do_it(nbd);
kthread_stop(thread);
@@ -768,10 +747,6 @@ static int nbd_ioctl(struct block_device *bdev, fmode_t mode,
BUG_ON(nbd->magic != NBD_MAGIC);
- /* Anyone capable of this syscall can do *real bad* things */
- dprintk(DBG_IOCTL, "%s: nbd_ioctl cmd=%s(0x%x) arg=%lu\n",
- nbd->disk->disk_name, ioctl_cmd_to_ascii(cmd), cmd, arg);
-
mutex_lock(&nbd->tx_lock);
error = __nbd_ioctl(bdev, nbd, cmd, arg);
mutex_unlock(&nbd->tx_lock);
@@ -861,7 +836,6 @@ static int __init nbd_init(void)
}
printk(KERN_INFO "nbd: registered device at major %d\n", NBD_MAJOR);
- dprintk(DBG_INIT, "nbd: debugflags=0x%x\n", debugflags);
for (i = 0; i < nbds_max; i++) {
struct gendisk *disk = nbd_dev[i].disk;
@@ -920,7 +894,3 @@ module_param(nbds_max, int, 0444);
MODULE_PARM_DESC(nbds_max, "number of network block devices to initialize (default: 16)");
module_param(max_part, int, 0444);
MODULE_PARM_DESC(max_part, "number of partitions per device (default: 0)");
-#ifndef NDEBUG
-module_param(debugflags, int, 0644);
-MODULE_PARM_DESC(debugflags, "flags for controlling debug output");
-#endif
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index e23be20a3417..85b8036deaa3 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -44,7 +44,7 @@
#define NVME_MINORS (1U << MINORBITS)
#define NVME_Q_DEPTH 1024
-#define NVME_AQ_DEPTH 64
+#define NVME_AQ_DEPTH 256
#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command))
#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion))
#define ADMIN_TIMEOUT (admin_timeout * HZ)
@@ -152,6 +152,7 @@ struct nvme_cmd_info {
*/
#define NVME_INT_PAGES 2
#define NVME_INT_BYTES(dev) (NVME_INT_PAGES * (dev)->page_size)
+#define NVME_INT_MASK 0x01
/*
* Will slightly overestimate the number of pages needed. This is OK
@@ -257,7 +258,7 @@ static void *iod_get_private(struct nvme_iod *iod)
*/
static bool iod_should_kfree(struct nvme_iod *iod)
{
- return (iod->private & 0x01) == 0;
+ return (iod->private & NVME_INT_MASK) == 0;
}
/* Special values must be less than 0x1000 */
@@ -301,8 +302,6 @@ static void *cancel_cmd_info(struct nvme_cmd_info *cmd, nvme_completion_fn *fn)
static void async_req_completion(struct nvme_queue *nvmeq, void *ctx,
struct nvme_completion *cqe)
{
- struct request *req = ctx;
-
u32 result = le32_to_cpup(&cqe->result);
u16 status = le16_to_cpup(&cqe->status) >> 1;
@@ -311,8 +310,6 @@ static void async_req_completion(struct nvme_queue *nvmeq, void *ctx,
if (status == NVME_SC_SUCCESS)
dev_warn(nvmeq->q_dmadev,
"async event result %08x\n", result);
-
- blk_mq_free_hctx_request(nvmeq->hctx, req);
}
static void abort_completion(struct nvme_queue *nvmeq, void *ctx,
@@ -432,7 +429,6 @@ static struct nvme_iod *nvme_alloc_iod(struct request *rq, struct nvme_dev *dev,
{
unsigned size = !(rq->cmd_flags & REQ_DISCARD) ? blk_rq_bytes(rq) :
sizeof(struct nvme_dsm_range);
- unsigned long mask = 0;
struct nvme_iod *iod;
if (rq->nr_phys_segments <= NVME_INT_PAGES &&
@@ -440,9 +436,8 @@ static struct nvme_iod *nvme_alloc_iod(struct request *rq, struct nvme_dev *dev,
struct nvme_cmd_info *cmd = blk_mq_rq_to_pdu(rq);
iod = cmd->iod;
- mask = 0x01;
iod_init(iod, size, rq->nr_phys_segments,
- (unsigned long) rq | 0x01);
+ (unsigned long) rq | NVME_INT_MASK);
return iod;
}
@@ -522,8 +517,6 @@ static void nvme_dif_remap(struct request *req,
return;
pmap = kmap_atomic(bip->bip_vec->bv_page) + bip->bip_vec->bv_offset;
- if (!pmap)
- return;
p = pmap;
virt = bip_get_seed(bip);
@@ -645,12 +638,12 @@ int nvme_setup_prps(struct nvme_dev *dev, struct nvme_iod *iod, int total_len,
struct scatterlist *sg = iod->sg;
int dma_len = sg_dma_len(sg);
u64 dma_addr = sg_dma_address(sg);
- int offset = offset_in_page(dma_addr);
+ u32 page_size = dev->page_size;
+ int offset = dma_addr & (page_size - 1);
__le64 *prp_list;
__le64 **list = iod_list(iod);
dma_addr_t prp_dma;
int nprps, i;
- u32 page_size = dev->page_size;
length -= (page_size - offset);
if (length <= 0)
@@ -1028,18 +1021,19 @@ static int nvme_submit_async_admin_req(struct nvme_dev *dev)
struct nvme_cmd_info *cmd_info;
struct request *req;
- req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_ATOMIC, false);
+ req = blk_mq_alloc_request(dev->admin_q, WRITE, GFP_ATOMIC, true);
if (IS_ERR(req))
return PTR_ERR(req);
req->cmd_flags |= REQ_NO_TIMEOUT;
cmd_info = blk_mq_rq_to_pdu(req);
- nvme_set_info(cmd_info, req, async_req_completion);
+ nvme_set_info(cmd_info, NULL, async_req_completion);
memset(&c, 0, sizeof(c));
c.common.opcode = nvme_admin_async_event;
c.common.command_id = req->tag;
+ blk_mq_free_hctx_request(nvmeq->hctx, req);
return __nvme_submit_cmd(nvmeq, &c);
}
@@ -1347,6 +1341,9 @@ static int nvme_suspend_queue(struct nvme_queue *nvmeq)
nvmeq->cq_vector = -1;
spin_unlock_irq(&nvmeq->q_lock);
+ if (!nvmeq->qid && nvmeq->dev->admin_q)
+ blk_mq_freeze_queue_start(nvmeq->dev->admin_q);
+
irq_set_affinity_hint(vector, NULL);
free_irq(vector, nvmeq);
@@ -1378,8 +1375,6 @@ static void nvme_disable_queue(struct nvme_dev *dev, int qid)
adapter_delete_sq(dev, qid);
adapter_delete_cq(dev, qid);
}
- if (!qid && dev->admin_q)
- blk_mq_freeze_queue_start(dev->admin_q);
spin_lock_irq(&nvmeq->q_lock);
nvme_process_cq(nvmeq);
@@ -1583,6 +1578,7 @@ static int nvme_alloc_admin_tags(struct nvme_dev *dev)
dev->admin_tagset.ops = &nvme_mq_admin_ops;
dev->admin_tagset.nr_hw_queues = 1;
dev->admin_tagset.queue_depth = NVME_AQ_DEPTH - 1;
+ dev->admin_tagset.reserved_tags = 1;
dev->admin_tagset.timeout = ADMIN_TIMEOUT;
dev->admin_tagset.numa_node = dev_to_node(&dev->pci_dev->dev);
dev->admin_tagset.cmd_size = nvme_cmd_size(dev);
@@ -1749,25 +1745,31 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
struct nvme_dev *dev = ns->dev;
struct nvme_user_io io;
struct nvme_command c;
- unsigned length, meta_len;
- int status, i;
- struct nvme_iod *iod, *meta_iod = NULL;
- dma_addr_t meta_dma_addr;
- void *meta, *uninitialized_var(meta_mem);
+ unsigned length, meta_len, prp_len;
+ int status, write;
+ struct nvme_iod *iod;
+ dma_addr_t meta_dma = 0;
+ void *meta = NULL;
if (copy_from_user(&io, uio, sizeof(io)))
return -EFAULT;
length = (io.nblocks + 1) << ns->lba_shift;
meta_len = (io.nblocks + 1) * ns->ms;
- if (meta_len && ((io.metadata & 3) || !io.metadata))
+ if (meta_len && ((io.metadata & 3) || !io.metadata) && !ns->ext)
return -EINVAL;
+ else if (meta_len && ns->ext) {
+ length += meta_len;
+ meta_len = 0;
+ }
+
+ write = io.opcode & 1;
switch (io.opcode) {
case nvme_cmd_write:
case nvme_cmd_read:
case nvme_cmd_compare:
- iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length);
+ iod = nvme_map_user_pages(dev, write, io.addr, length);
break;
default:
return -EINVAL;
@@ -1776,6 +1778,27 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
if (IS_ERR(iod))
return PTR_ERR(iod);
+ prp_len = nvme_setup_prps(dev, iod, length, GFP_KERNEL);
+ if (length != prp_len) {
+ status = -ENOMEM;
+ goto unmap;
+ }
+ if (meta_len) {
+ meta = dma_alloc_coherent(&dev->pci_dev->dev, meta_len,
+ &meta_dma, GFP_KERNEL);
+ if (!meta) {
+ status = -ENOMEM;
+ goto unmap;
+ }
+ if (write) {
+ if (copy_from_user(meta, (void __user *)io.metadata,
+ meta_len)) {
+ status = -EFAULT;
+ goto unmap;
+ }
+ }
+ }
+
memset(&c, 0, sizeof(c));
c.rw.opcode = io.opcode;
c.rw.flags = io.flags;
@@ -1787,75 +1810,21 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
c.rw.reftag = cpu_to_le32(io.reftag);
c.rw.apptag = cpu_to_le16(io.apptag);
c.rw.appmask = cpu_to_le16(io.appmask);
-
- if (meta_len) {
- meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata,
- meta_len);
- if (IS_ERR(meta_iod)) {
- status = PTR_ERR(meta_iod);
- meta_iod = NULL;
- goto unmap;
- }
-
- meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len,
- &meta_dma_addr, GFP_KERNEL);
- if (!meta_mem) {
- status = -ENOMEM;
- goto unmap;
- }
-
- if (io.opcode & 1) {
- int meta_offset = 0;
-
- for (i = 0; i < meta_iod->nents; i++) {
- meta = kmap_atomic(sg_page(&meta_iod->sg[i])) +
- meta_iod->sg[i].offset;
- memcpy(meta_mem + meta_offset, meta,
- meta_iod->sg[i].length);
- kunmap_atomic(meta);
- meta_offset += meta_iod->sg[i].length;
- }
- }
-
- c.rw.metadata = cpu_to_le64(meta_dma_addr);
- }
-
- length = nvme_setup_prps(dev, iod, length, GFP_KERNEL);
c.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));
c.rw.prp2 = cpu_to_le64(iod->first_dma);
-
- if (length != (io.nblocks + 1) << ns->lba_shift)
- status = -ENOMEM;
- else
- status = nvme_submit_io_cmd(dev, ns, &c, NULL);
-
- if (meta_len) {
- if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) {
- int meta_offset = 0;
-
- for (i = 0; i < meta_iod->nents; i++) {
- meta = kmap_atomic(sg_page(&meta_iod->sg[i])) +
- meta_iod->sg[i].offset;
- memcpy(meta, meta_mem + meta_offset,
- meta_iod->sg[i].length);
- kunmap_atomic(meta);
- meta_offset += meta_iod->sg[i].length;
- }
- }
-
- dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem,
- meta_dma_addr);
- }
-
+ c.rw.metadata = cpu_to_le64(meta_dma);
+ status = nvme_submit_io_cmd(dev, ns, &c, NULL);
unmap:
- nvme_unmap_user_pages(dev, io.opcode & 1, iod);
+ nvme_unmap_user_pages(dev, write, iod);
nvme_free_iod(dev, iod);
-
- if (meta_iod) {
- nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod);
- nvme_free_iod(dev, meta_iod);
+ if (meta) {
+ if (status == NVME_SC_SUCCESS && !write) {
+ if (copy_to_user((void __user *)io.metadata, meta,
+ meta_len))
+ status = -EFAULT;
+ }
+ dma_free_coherent(&dev->pci_dev->dev, meta_len, meta, meta_dma);
}
-
return status;
}
@@ -2018,7 +1987,8 @@ static int nvme_revalidate_disk(struct gendisk *disk)
struct nvme_dev *dev = ns->dev;
struct nvme_id_ns *id;
dma_addr_t dma_addr;
- int lbaf, pi_type, old_ms;
+ u8 lbaf, pi_type;
+ u16 old_ms;
unsigned short bs;
id = dma_alloc_coherent(&dev->pci_dev->dev, 4096, &dma_addr,
@@ -2039,6 +2009,7 @@ static int nvme_revalidate_disk(struct gendisk *disk)
lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK;
ns->lba_shift = id->lbaf[lbaf].ds;
ns->ms = le16_to_cpu(id->lbaf[lbaf].ms);
+ ns->ext = ns->ms && (id->flbas & NVME_NS_FLBAS_META_EXT);
/*
* If identify namespace failed, use default 512 byte block size so
@@ -2055,14 +2026,14 @@ static int nvme_revalidate_disk(struct gendisk *disk)
if (blk_get_integrity(disk) && (ns->pi_type != pi_type ||
ns->ms != old_ms ||
bs != queue_logical_block_size(disk->queue) ||
- (ns->ms && id->flbas & NVME_NS_FLBAS_META_EXT)))
+ (ns->ms && ns->ext)))
blk_integrity_unregister(disk);
ns->pi_type = pi_type;
blk_queue_logical_block_size(ns->queue, bs);
if (ns->ms && !blk_get_integrity(disk) && (disk->flags & GENHD_FL_UP) &&
- !(id->flbas & NVME_NS_FLBAS_META_EXT))
+ !ns->ext)
nvme_init_integrity(ns);
if (id->ncap == 0 || (ns->ms && !blk_get_integrity(disk)))
@@ -2334,7 +2305,6 @@ static int nvme_dev_add(struct nvme_dev *dev)
dev->oncs = le16_to_cpup(&ctrl->oncs);
dev->abort_limit = ctrl->acl + 1;
dev->vwc = ctrl->vwc;
- dev->event_limit = min(ctrl->aerl + 1, 8);
memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn));
memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn));
memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr));
@@ -2881,6 +2851,7 @@ static int nvme_dev_start(struct nvme_dev *dev)
nvme_set_irq_hints(dev);
+ dev->event_limit = 1;
return result;
free_tags:
@@ -3166,8 +3137,10 @@ static int __init nvme_init(void)
nvme_char_major = result;
nvme_class = class_create(THIS_MODULE, "nvme");
- if (!nvme_class)
+ if (IS_ERR(nvme_class)) {
+ result = PTR_ERR(nvme_class);
goto unregister_chrdev;
+ }
result = pci_register_driver(&nvme_driver);
if (result)
diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c
index e10196e0182d..6b736b00f63e 100644
--- a/drivers/block/nvme-scsi.c
+++ b/drivers/block/nvme-scsi.c
@@ -55,6 +55,7 @@ static int sg_version_num = 30534; /* 2 digits for each component */
#define VPD_SERIAL_NUMBER 0x80
#define VPD_DEVICE_IDENTIFIERS 0x83
#define VPD_EXTENDED_INQUIRY 0x86
+#define VPD_BLOCK_LIMITS 0xB0
#define VPD_BLOCK_DEV_CHARACTERISTICS 0xB1
/* CDB offsets */
@@ -132,9 +133,10 @@ static int sg_version_num = 30534; /* 2 digits for each component */
#define INQ_UNIT_SERIAL_NUMBER_PAGE 0x80
#define INQ_DEVICE_IDENTIFICATION_PAGE 0x83
#define INQ_EXTENDED_INQUIRY_DATA_PAGE 0x86
+#define INQ_BDEV_LIMITS_PAGE 0xB0
#define INQ_BDEV_CHARACTERISTICS_PAGE 0xB1
#define INQ_SERIAL_NUMBER_LENGTH 0x14
-#define INQ_NUM_SUPPORTED_VPD_PAGES 5
+#define INQ_NUM_SUPPORTED_VPD_PAGES 6
#define VERSION_SPC_4 0x06
#define ACA_UNSUPPORTED 0
#define STANDARD_INQUIRY_LENGTH 36
@@ -747,6 +749,7 @@ static int nvme_trans_supported_vpd_pages(struct nvme_ns *ns,
inq_response[6] = INQ_DEVICE_IDENTIFICATION_PAGE;
inq_response[7] = INQ_EXTENDED_INQUIRY_DATA_PAGE;
inq_response[8] = INQ_BDEV_CHARACTERISTICS_PAGE;
+ inq_response[9] = INQ_BDEV_LIMITS_PAGE;
xfer_len = min(alloc_len, STANDARD_INQUIRY_LENGTH);
res = nvme_trans_copy_to_user(hdr, inq_response, xfer_len);
@@ -938,6 +941,25 @@ static int nvme_trans_ext_inq_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
return res;
}
+static int nvme_trans_bdev_limits_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
+ u8 *inq_response, int alloc_len)
+{
+ __be32 max_sectors = cpu_to_be32(queue_max_hw_sectors(ns->queue));
+ __be32 max_discard = cpu_to_be32(ns->queue->limits.max_discard_sectors);
+ __be32 discard_desc_count = cpu_to_be32(0x100);
+
+ memset(inq_response, 0, STANDARD_INQUIRY_LENGTH);
+ inq_response[1] = VPD_BLOCK_LIMITS;
+ inq_response[3] = 0x3c; /* Page Length */
+ memcpy(&inq_response[8], &max_sectors, sizeof(u32));
+ memcpy(&inq_response[20], &max_discard, sizeof(u32));
+
+ if (max_discard)
+ memcpy(&inq_response[24], &discard_desc_count, sizeof(u32));
+
+ return nvme_trans_copy_to_user(hdr, inq_response, 0x3c);
+}
+
static int nvme_trans_bdev_char_page(struct nvme_ns *ns, struct sg_io_hdr *hdr,
int alloc_len)
{
@@ -2268,6 +2290,10 @@ static int nvme_trans_inquiry(struct nvme_ns *ns, struct sg_io_hdr *hdr,
case VPD_EXTENDED_INQUIRY:
res = nvme_trans_ext_inq_page(ns, hdr, alloc_len);
break;
+ case VPD_BLOCK_LIMITS:
+ res = nvme_trans_bdev_limits_page(ns, hdr, inq_response,
+ alloc_len);
+ break;
case VPD_BLOCK_DEV_CHARACTERISTICS:
res = nvme_trans_bdev_char_page(ns, hdr, alloc_len);
break;
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index 2a04d341e598..bd2b3bbbb22c 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -34,6 +34,8 @@
* IN THE SOFTWARE.
*/
+#define pr_fmt(fmt) "xen-blkback: " fmt
+
#include <linux/spinlock.h>
#include <linux/kthread.h>
#include <linux/list.h>
@@ -211,7 +213,7 @@ static int add_persistent_gnt(struct xen_blkif *blkif,
else if (persistent_gnt->gnt > this->gnt)
new = &((*new)->rb_right);
else {
- pr_alert_ratelimited(DRV_PFX " trying to add a gref that's already in the tree\n");
+ pr_alert_ratelimited("trying to add a gref that's already in the tree\n");
return -EINVAL;
}
}
@@ -242,7 +244,7 @@ static struct persistent_gnt *get_persistent_gnt(struct xen_blkif *blkif,
node = node->rb_right;
else {
if(test_bit(PERSISTENT_GNT_ACTIVE, data->flags)) {
- pr_alert_ratelimited(DRV_PFX " requesting a grant already in use\n");
+ pr_alert_ratelimited("requesting a grant already in use\n");
return NULL;
}
set_bit(PERSISTENT_GNT_ACTIVE, data->flags);
@@ -257,7 +259,7 @@ static void put_persistent_gnt(struct xen_blkif *blkif,
struct persistent_gnt *persistent_gnt)
{
if(!test_bit(PERSISTENT_GNT_ACTIVE, persistent_gnt->flags))
- pr_alert_ratelimited(DRV_PFX " freeing a grant already unused");
+ pr_alert_ratelimited("freeing a grant already unused\n");
set_bit(PERSISTENT_GNT_WAS_ACTIVE, persistent_gnt->flags);
clear_bit(PERSISTENT_GNT_ACTIVE, persistent_gnt->flags);
atomic_dec(&blkif->persistent_gnt_in_use);
@@ -374,7 +376,7 @@ static void purge_persistent_gnt(struct xen_blkif *blkif)
}
if (work_pending(&blkif->persistent_purge_work)) {
- pr_alert_ratelimited(DRV_PFX "Scheduled work from previous purge is still pending, cannot purge list\n");
+ pr_alert_ratelimited("Scheduled work from previous purge is still pending, cannot purge list\n");
return;
}
@@ -396,7 +398,7 @@ static void purge_persistent_gnt(struct xen_blkif *blkif)
total = num_clean;
- pr_debug(DRV_PFX "Going to purge %u persistent grants\n", num_clean);
+ pr_debug("Going to purge %u persistent grants\n", num_clean);
BUG_ON(!list_empty(&blkif->persistent_purge_list));
root = &blkif->persistent_gnts;
@@ -428,13 +430,13 @@ purge_list:
* with the requested num
*/
if (!scan_used && !clean_used) {
- pr_debug(DRV_PFX "Still missing %u purged frames\n", num_clean);
+ pr_debug("Still missing %u purged frames\n", num_clean);
scan_used = true;
goto purge_list;
}
finished:
if (!clean_used) {
- pr_debug(DRV_PFX "Finished scanning for grants to clean, removing used flag\n");
+ pr_debug("Finished scanning for grants to clean, removing used flag\n");
clean_used = true;
goto purge_list;
}
@@ -444,7 +446,7 @@ finished:
/* We can defer this work */
schedule_work(&blkif->persistent_purge_work);
- pr_debug(DRV_PFX "Purged %u/%u\n", (total - num_clean), total);
+ pr_debug("Purged %u/%u\n", (total - num_clean), total);
return;
}
@@ -520,20 +522,20 @@ static void xen_vbd_resize(struct xen_blkif *blkif)
struct xenbus_device *dev = xen_blkbk_xenbus(blkif->be);
unsigned long long new_size = vbd_sz(vbd);
- pr_info(DRV_PFX "VBD Resize: Domid: %d, Device: (%d, %d)\n",
+ pr_info("VBD Resize: Domid: %d, Device: (%d, %d)\n",
blkif->domid, MAJOR(vbd->pdevice), MINOR(vbd->pdevice));
- pr_info(DRV_PFX "VBD Resize: new size %llu\n", new_size);
+ pr_info("VBD Resize: new size %llu\n", new_size);
vbd->size = new_size;
again:
err = xenbus_transaction_start(&xbt);
if (err) {
- pr_warn(DRV_PFX "Error starting transaction");
+ pr_warn("Error starting transaction\n");
return;
}
err = xenbus_printf(xbt, dev->nodename, "sectors", "%llu",
(unsigned long long)vbd_sz(vbd));
if (err) {
- pr_warn(DRV_PFX "Error writing new size");
+ pr_warn("Error writing new size\n");
goto abort;
}
/*
@@ -543,7 +545,7 @@ again:
*/
err = xenbus_printf(xbt, dev->nodename, "state", "%d", dev->state);
if (err) {
- pr_warn(DRV_PFX "Error writing the state");
+ pr_warn("Error writing the state\n");
goto abort;
}
@@ -551,7 +553,7 @@ again:
if (err == -EAGAIN)
goto again;
if (err)
- pr_warn(DRV_PFX "Error ending transaction");
+ pr_warn("Error ending transaction\n");
return;
abort:
xenbus_transaction_end(xbt, 1);
@@ -578,7 +580,7 @@ irqreturn_t xen_blkif_be_int(int irq, void *dev_id)
static void print_stats(struct xen_blkif *blkif)
{
- pr_info("xen-blkback (%s): oo %3llu | rd %4llu | wr %4llu | f %4llu"
+ pr_info("(%s): oo %3llu | rd %4llu | wr %4llu | f %4llu"
" | ds %4llu | pg: %4u/%4d\n",
current->comm, blkif->st_oo_req,
blkif->st_rd_req, blkif->st_wr_req,
@@ -855,7 +857,7 @@ again:
/* This is a newly mapped grant */
BUG_ON(new_map_idx >= segs_to_map);
if (unlikely(map[new_map_idx].status != 0)) {
- pr_debug(DRV_PFX "invalid buffer -- could not remap it\n");
+ pr_debug("invalid buffer -- could not remap it\n");
put_free_pages(blkif, &pages[seg_idx]->page, 1);
pages[seg_idx]->handle = BLKBACK_INVALID_HANDLE;
ret |= 1;
@@ -891,14 +893,14 @@ again:
goto next;
}
pages[seg_idx]->persistent_gnt = persistent_gnt;
- pr_debug(DRV_PFX " grant %u added to the tree of persistent grants, using %u/%u\n",
+ pr_debug("grant %u added to the tree of persistent grants, using %u/%u\n",
persistent_gnt->gnt, blkif->persistent_gnt_c,
xen_blkif_max_pgrants);
goto next;
}
if (use_persistent_gnts && !blkif->vbd.overflow_max_grants) {
blkif->vbd.overflow_max_grants = 1;
- pr_debug(DRV_PFX " domain %u, device %#x is using maximum number of persistent grants\n",
+ pr_debug("domain %u, device %#x is using maximum number of persistent grants\n",
blkif->domid, blkif->vbd.handle);
}
/*
@@ -916,7 +918,7 @@ next:
return ret;
out_of_memory:
- pr_alert(DRV_PFX "%s: out of memory\n", __func__);
+ pr_alert("%s: out of memory\n", __func__);
put_free_pages(blkif, pages_to_gnt, segs_to_map);
return -ENOMEM;
}
@@ -996,7 +998,7 @@ static int dispatch_discard_io(struct xen_blkif *blkif,
err = xen_vbd_translate(&preq, blkif, WRITE);
if (err) {
- pr_warn(DRV_PFX "access denied: DISCARD [%llu->%llu] on dev=%04x\n",
+ pr_warn("access denied: DISCARD [%llu->%llu] on dev=%04x\n",
preq.sector_number,
preq.sector_number + preq.nr_sects, blkif->vbd.pdevice);
goto fail_response;
@@ -1012,7 +1014,7 @@ static int dispatch_discard_io(struct xen_blkif *blkif,
GFP_KERNEL, secure);
fail_response:
if (err == -EOPNOTSUPP) {
- pr_debug(DRV_PFX "discard op failed, not supported\n");
+ pr_debug("discard op failed, not supported\n");
status = BLKIF_RSP_EOPNOTSUPP;
} else if (err)
status = BLKIF_RSP_ERROR;
@@ -1056,16 +1058,16 @@ static void __end_block_io_op(struct pending_req *pending_req, int error)
/* An error fails the entire request. */
if ((pending_req->operation == BLKIF_OP_FLUSH_DISKCACHE) &&
(error == -EOPNOTSUPP)) {
- pr_debug(DRV_PFX "flush diskcache op failed, not supported\n");
+ pr_debug("flush diskcache op failed, not supported\n");
xen_blkbk_flush_diskcache(XBT_NIL, pending_req->blkif->be, 0);
pending_req->status = BLKIF_RSP_EOPNOTSUPP;
} else if ((pending_req->operation == BLKIF_OP_WRITE_BARRIER) &&
(error == -EOPNOTSUPP)) {
- pr_debug(DRV_PFX "write barrier op failed, not supported\n");
+ pr_debug("write barrier op failed, not supported\n");
xen_blkbk_barrier(XBT_NIL, pending_req->blkif->be, 0);
pending_req->status = BLKIF_RSP_EOPNOTSUPP;
} else if (error) {
- pr_debug(DRV_PFX "Buffer not up-to-date at end of operation,"
+ pr_debug("Buffer not up-to-date at end of operation,"
" error=%d\n", error);
pending_req->status = BLKIF_RSP_ERROR;
}
@@ -1110,7 +1112,7 @@ __do_block_io_op(struct xen_blkif *blkif)
if (RING_REQUEST_PROD_OVERFLOW(&blk_rings->common, rp)) {
rc = blk_rings->common.rsp_prod_pvt;
- pr_warn(DRV_PFX "Frontend provided bogus ring requests (%d - %d = %d). Halting ring processing on dev=%04x\n",
+ pr_warn("Frontend provided bogus ring requests (%d - %d = %d). Halting ring processing on dev=%04x\n",
rp, rc, rp - rc, blkif->vbd.pdevice);
return -EACCES;
}
@@ -1217,8 +1219,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
if ((req->operation == BLKIF_OP_INDIRECT) &&
(req_operation != BLKIF_OP_READ) &&
(req_operation != BLKIF_OP_WRITE)) {
- pr_debug(DRV_PFX "Invalid indirect operation (%u)\n",
- req_operation);
+ pr_debug("Invalid indirect operation (%u)\n", req_operation);
goto fail_response;
}
@@ -1252,8 +1253,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
(nseg > BLKIF_MAX_SEGMENTS_PER_REQUEST)) ||
unlikely((req->operation == BLKIF_OP_INDIRECT) &&
(nseg > MAX_INDIRECT_SEGMENTS))) {
- pr_debug(DRV_PFX "Bad number of segments in request (%d)\n",
- nseg);
+ pr_debug("Bad number of segments in request (%d)\n", nseg);
/* Haven't submitted any bio's yet. */
goto fail_response;
}
@@ -1288,7 +1288,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
}
if (xen_vbd_translate(&preq, blkif, operation) != 0) {
- pr_debug(DRV_PFX "access denied: %s of [%llu,%llu] on dev=%04x\n",
+ pr_debug("access denied: %s of [%llu,%llu] on dev=%04x\n",
operation == READ ? "read" : "write",
preq.sector_number,
preq.sector_number + preq.nr_sects,
@@ -1303,7 +1303,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
for (i = 0; i < nseg; i++) {
if (((int)preq.sector_number|(int)seg[i].nsec) &
((bdev_logical_block_size(preq.bdev) >> 9) - 1)) {
- pr_debug(DRV_PFX "Misaligned I/O request from domain %d",
+ pr_debug("Misaligned I/O request from domain %d\n",
blkif->domid);
goto fail_response;
}
diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h
index 375d28851860..f620b5d3f77c 100644
--- a/drivers/block/xen-blkback/common.h
+++ b/drivers/block/xen-blkback/common.h
@@ -44,12 +44,6 @@
#include <xen/interface/io/blkif.h>
#include <xen/interface/io/protocols.h>
-#define DRV_PFX "xen-blkback:"
-#define DPRINTK(fmt, args...) \
- pr_debug(DRV_PFX "(%s:%d) " fmt ".\n", \
- __func__, __LINE__, ##args)
-
-
/*
* This is the maximum number of segments that would be allowed in indirect
* requests. This value will also be passed to the frontend.
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index ff3025922c14..6ab69ad61ee1 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -14,6 +14,8 @@
*/
+#define pr_fmt(fmt) "xen-blkback: " fmt
+
#include <stdarg.h>
#include <linux/module.h>
#include <linux/kthread.h>
@@ -21,6 +23,9 @@
#include <xen/grant_table.h>
#include "common.h"
+/* Enlarge the array size in order to fully show blkback name. */
+#define BLKBACK_NAME_LEN (20)
+
struct backend_info {
struct xenbus_device *dev;
struct xen_blkif *blkif;
@@ -70,7 +75,7 @@ static int blkback_name(struct xen_blkif *blkif, char *buf)
else
devname = devpath;
- snprintf(buf, TASK_COMM_LEN, "blkback.%d.%s", blkif->domid, devname);
+ snprintf(buf, BLKBACK_NAME_LEN, "blkback.%d.%s", blkif->domid, devname);
kfree(devpath);
return 0;
@@ -79,7 +84,7 @@ static int blkback_name(struct xen_blkif *blkif, char *buf)
static void xen_update_blkif_status(struct xen_blkif *blkif)
{
int err;
- char name[TASK_COMM_LEN];
+ char name[BLKBACK_NAME_LEN];
/* Not ready to connect? */
if (!blkif->irq || !blkif->vbd.bdev)
@@ -424,14 +429,14 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
FMODE_READ : FMODE_WRITE, NULL);
if (IS_ERR(bdev)) {
- DPRINTK("xen_vbd_create: device %08x could not be opened.\n",
+ pr_warn("xen_vbd_create: device %08x could not be opened\n",
vbd->pdevice);
return -ENOENT;
}
vbd->bdev = bdev;
if (vbd->bdev->bd_disk == NULL) {
- DPRINTK("xen_vbd_create: device %08x doesn't exist.\n",
+ pr_warn("xen_vbd_create: device %08x doesn't exist\n",
vbd->pdevice);
xen_vbd_free(vbd);
return -ENOENT;
@@ -450,7 +455,7 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
if (q && blk_queue_secdiscard(q))
vbd->discard_secure = true;
- DPRINTK("Successful creation of handle=%04x (dom=%u)\n",
+ pr_debug("Successful creation of handle=%04x (dom=%u)\n",
handle, blkif->domid);
return 0;
}
@@ -458,7 +463,7 @@ static int xen_blkbk_remove(struct xenbus_device *dev)
{
struct backend_info *be = dev_get_drvdata(&dev->dev);
- DPRINTK("");
+ pr_debug("%s %p %d\n", __func__, dev, dev->otherend_id);
if (be->major || be->minor)
xenvbd_sysfs_delif(dev);
@@ -564,6 +569,10 @@ static int xen_blkbk_probe(struct xenbus_device *dev,
int err;
struct backend_info *be = kzalloc(sizeof(struct backend_info),
GFP_KERNEL);
+
+ /* match the pr_debug in xen_blkbk_remove */
+ pr_debug("%s %p %d\n", __func__, dev, dev->otherend_id);
+
if (!be) {
xenbus_dev_fatal(dev, -ENOMEM,
"allocating backend structure");
@@ -595,7 +604,7 @@ static int xen_blkbk_probe(struct xenbus_device *dev,
return 0;
fail:
- DPRINTK("failed");
+ pr_warn("%s failed\n", __func__);
xen_blkbk_remove(dev);
return err;
}
@@ -619,7 +628,7 @@ static void backend_changed(struct xenbus_watch *watch,
unsigned long handle;
char *device_type;
- DPRINTK("");
+ pr_debug("%s %p %d\n", __func__, dev, dev->otherend_id);
err = xenbus_scanf(XBT_NIL, dev->nodename, "physical-device", "%x:%x",
&major, &minor);
@@ -638,7 +647,7 @@ static void backend_changed(struct xenbus_watch *watch,
if (be->major | be->minor) {
if (be->major != major || be->minor != minor)
- pr_warn(DRV_PFX "changing physical device (from %x:%x to %x:%x) not supported.\n",
+ pr_warn("changing physical device (from %x:%x to %x:%x) not supported.\n",
be->major, be->minor, major, minor);
return;
}
@@ -699,13 +708,12 @@ static void frontend_changed(struct xenbus_device *dev,
struct backend_info *be = dev_get_drvdata(&dev->dev);
int err;
- DPRINTK("%s", xenbus_strstate(frontend_state));
+ pr_debug("%s %p %s\n", __func__, dev, xenbus_strstate(frontend_state));
switch (frontend_state) {
case XenbusStateInitialising:
if (dev->state == XenbusStateClosed) {
- pr_info(DRV_PFX "%s: prepare for reconnect\n",
- dev->nodename);
+ pr_info("%s: prepare for reconnect\n", dev->nodename);
xenbus_switch_state(dev, XenbusStateInitWait);
}
break;
@@ -772,7 +780,7 @@ static void connect(struct backend_info *be)
int err;
struct xenbus_device *dev = be->dev;
- DPRINTK("%s", dev->otherend);
+ pr_debug("%s %s\n", __func__, dev->otherend);
/* Supply the information about the device the frontend needs */
again:
@@ -858,7 +866,7 @@ static int connect_ring(struct backend_info *be)
char protocol[64] = "";
int err;
- DPRINTK("%s", dev->otherend);
+ pr_debug("%s %s\n", __func__, dev->otherend);
err = xenbus_gather(XBT_NIL, dev->otherend, "ring-ref", "%lu",
&ring_ref, "event-channel", "%u", &evtchn, NULL);
@@ -893,7 +901,7 @@ static int connect_ring(struct backend_info *be)
be->blkif->vbd.feature_gnt_persistent = pers_grants;
be->blkif->vbd.overflow_max_grants = 0;
- pr_info(DRV_PFX "ring-ref %ld, event-channel %d, protocol %d (%s) %s\n",
+ pr_info("ring-ref %ld, event-channel %d, protocol %d (%s) %s\n",
ring_ref, evtchn, be->blkif->blk_protocol, protocol,
pers_grants ? "persistent grants" : "");
diff --git a/include/linux/nbd.h b/include/linux/nbd.h
deleted file mode 100644
index f62f78aef4ac..000000000000
--- a/include/linux/nbd.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * 1999 Copyright (C) Pavel Machek, pavel@ucw.cz. This code is GPL.
- * 1999/11/04 Copyright (C) 1999 VMware, Inc. (Regis "HPReg" Duchesne)
- * Made nbd_end_request() use the io_request_lock
- * 2001 Copyright (C) Steven Whitehouse
- * New nbd_end_request() for compatibility with new linux block
- * layer code.
- * 2003/06/24 Louis D. Langholtz <ldl@aros.net>
- * Removed unneeded blksize_bits field from nbd_device struct.
- * Cleanup PARANOIA usage & code.
- * 2004/02/19 Paul Clements
- * Removed PARANOIA, plus various cleanup and comments
- */
-#ifndef LINUX_NBD_H
-#define LINUX_NBD_H
-
-
-#include <linux/wait.h>
-#include <linux/mutex.h>
-#include <uapi/linux/nbd.h>
-
-struct request;
-
-struct nbd_device {
- int flags;
- int harderror; /* Code of hard error */
- struct socket * sock; /* If == NULL, device is not ready, yet */
- int magic;
-
- spinlock_t queue_lock;
- struct list_head queue_head; /* Requests waiting result */
- struct request *active_req;
- wait_queue_head_t active_wq;
- struct list_head waiting_queue; /* Requests to be sent */
- wait_queue_head_t waiting_wq;
-
- struct mutex tx_lock;
- struct gendisk *disk;
- int blksize;
- u64 bytesize;
- pid_t pid; /* pid of nbd-client, if attached */
- int xmit_timeout;
- int disconnect; /* a disconnect has been requested by user */
-};
-
-#endif
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 0adad4a5419b..8dbd05e70f09 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -117,8 +117,9 @@ struct nvme_ns {
unsigned ns_id;
int lba_shift;
- int ms;
- int pi_type;
+ u16 ms;
+ bool ext;
+ u8 pi_type;
u64 mode_select_num_blocks;
u32 mode_select_block_len;
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 14:36:35 +0000