Merge branch 'for-3.2/drivers' of git://git.kernel.dk/linux-block
Merge commit. Changes below are compared with the first parent: b4fdcb02.
Changes
18 files changed · +638 −123
| File | Status | Add | Del | Content |
|---|---|---|---|---|
| Documentation/ABI/testing/sysfs-bus-pci-devices-cciss | modified | +7 | −0 | View file |
| Documentation/blockdev/cciss.txt | modified | +10 | −0 | View file |
| block/genhd.c | modified | +2 | −2 | View file |
| block/ioctl.c | modified | +1 | −1 | View file |
| drivers/block/cciss.c | modified | +65 | −11 | View file |
| drivers/block/cciss.h | modified | +1 | −0 | View file |
| drivers/block/cpqarray.c | modified | +1 | −1 | View file |
| drivers/block/loop.c | modified | +104 | −7 | View file |
| drivers/block/nbd.c | modified | +34 | −35 | View file |
| drivers/block/xen-blkback/blkback.c | modified | +109 | −21 | View file |
| drivers/block/xen-blkback/common.h | modified | +81 | −17 | View file |
| drivers/block/xen-blkback/xenbus.c | modified | +76 | −0 | View file |
| drivers/block/xen-blkfront.c | modified | +98 | −25 | View file |
| drivers/scsi/hpsa.c | modified | +7 | −0 | View file |
| fs/block_dev.c | modified | +1 | −1 | View file |
| include/linux/genhd.h | modified | +4 | −2 | View file |
| include/linux/loop.h | modified | +1 | −0 | View file |
| include/xen/interface/io/blkif.h | modified | +36 | −0 | View file |
Only the first 600 diff lines are shown. Download the complete patch.
Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
View filediff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
index f5bb0a3..53d99ed 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
+++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
@@ -71,3 +71,10 @@ Description: Value of 1 indicates the controller can honor the reset_devices
a dump device, as kdump requires resetting the device in order
to work reliably.
+Where: /sys/bus/pci/devices/<dev>/ccissX/transport_mode
+Date: July 2011
+Kernel Version: 3.0
+Contact: [email protected]
+Description: Value of "simple" indicates that the controller has been placed
+ in "simple mode". Value of "performant" indicates that the
+ controller has been placed in "performant mode".
Documentation/blockdev/cciss.txt
View filediff --git a/Documentation/blockdev/cciss.txt b/Documentation/blockdev/cciss.txt
index c00c6a5..71464e0 100644
--- a/Documentation/blockdev/cciss.txt
+++ b/Documentation/blockdev/cciss.txt
@@ -78,6 +78,16 @@ The device naming scheme is:
/dev/cciss/c1d1p2 Controller 1, disk 1, partition 2
/dev/cciss/c1d1p3 Controller 1, disk 1, partition 3
+CCISS simple mode support
+-------------------------
+
+The "cciss_simple_mode=1" boot parameter may be used to prevent the driver
+from putting the controller into "performant" mode. The difference is that
+with simple mode, each command completion requires an interrupt, while with
+"performant mode" (the default, and ordinarily better performing) it is
+possible to have multiple command completions indicated by a single
+interrupt.
+
SCSI tape drive and medium changer support
------------------------------------------
block/genhd.c
View filediff --git a/block/genhd.c b/block/genhd.c
index 024fc39..9253839 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -537,7 +537,7 @@ void register_disk(struct gendisk *disk)
disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
/* No minors to use for partitions */
- if (!disk_partitionable(disk))
+ if (!disk_part_scan_enabled(disk))
goto exit;
/* No such device (e.g., media were just removed) */
@@ -848,7 +848,7 @@ static int show_partition(struct seq_file *seqf, void *v)
char buf[BDEVNAME_SIZE];
/* Don't show non-partitionable removeable devices or empty devices */
- if (!get_capacity(sgp) || (!disk_partitionable(sgp) &&
+ if (!get_capacity(sgp) || (!disk_max_parts(sgp) &&
(sgp->flags & GENHD_FL_REMOVABLE)))
return 0;
if (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)
block/ioctl.c
View filediff --git a/block/ioctl.c b/block/ioctl.c
index 1124cd2..5c74efc 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -101,7 +101,7 @@ static int blkdev_reread_part(struct block_device *bdev)
struct gendisk *disk = bdev->bd_disk;
int res;
- if (!disk_partitionable(disk) || bdev != bdev->bd_contains)
+ if (!disk_part_scan_enabled(disk) || bdev != bdev->bd_contains)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
drivers/block/cciss.c
View filediff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 8f4ef65..486f94e 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -68,6 +68,10 @@ static int cciss_tape_cmds = 6;
module_param(cciss_tape_cmds, int, 0644);
MODULE_PARM_DESC(cciss_tape_cmds,
"number of commands to allocate for tape devices (default: 6)");
+static int cciss_simple_mode;
+module_param(cciss_simple_mode, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(cciss_simple_mode,
+ "Use 'simple mode' rather than 'performant mode'");
static DEFINE_MUTEX(cciss_mutex);
static struct proc_dir_entry *proc_cciss;
@@ -176,6 +180,7 @@ static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
unsigned int block_size, InquiryData_struct *inq_buff,
drive_info_struct *drv);
static void __devinit cciss_interrupt_mode(ctlr_info_t *);
+static int __devinit cciss_enter_simple_mode(struct ctlr_info *h);
static void start_io(ctlr_info_t *h);
static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
__u8 page_code, unsigned char scsi3addr[],
@@ -388,7 +393,7 @@ static void cciss_seq_show_header(struct seq_file *seq)
h->product_name,
(unsigned long)h->board_id,
h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
- h->firm_ver[3], (unsigned int)h->intr[PERF_MODE_INT],
+ h->firm_ver[3], (unsigned int)h->intr[h->intr_mode],
h->num_luns,
h->Qdepth, h->commands_outstanding,
h->maxQsinceinit, h->max_outstanding, h->maxSG);
@@ -636,6 +641,18 @@ static ssize_t host_store_rescan(struct device *dev,
}
static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
+static ssize_t host_show_transport_mode(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ctlr_info *h = to_hba(dev);
+
+ return snprintf(buf, 20, "%s\n",
+ h->transMethod & CFGTBL_Trans_Performant ?
+ "performant" : "simple");
+}
+static DEVICE_ATTR(transport_mode, S_IRUGO, host_show_transport_mode, NULL);
+
static ssize_t dev_show_unique_id(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -808,6 +825,7 @@ static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
static struct attribute *cciss_host_attrs[] = {
&dev_attr_rescan.attr,
&dev_attr_resettable.attr,
+ &dev_attr_transport_mode.attr,
NULL
};
@@ -3984,6 +4002,9 @@ static void __devinit cciss_put_controller_into_performant_mode(ctlr_info_t *h)
{
__u32 trans_support;
+ if (cciss_simple_mode)
+ return;
+
dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n");
/* Attempt to put controller into performant mode if supported */
/* Does board support performant mode? */
@@ -4081,7 +4102,7 @@ static void __devinit cciss_interrupt_mode(ctlr_info_t *h)
default_int_mode:
#endif /* CONFIG_PCI_MSI */
/* if we get here we're going to use the default interrupt mode */
- h->intr[PERF_MODE_INT] = h->pdev->irq;
+ h->intr[h->intr_mode] = h->pdev->irq;
return;
}
@@ -4341,6 +4362,9 @@ static int __devinit cciss_pci_init(ctlr_info_t *h)
}
cciss_enable_scsi_prefetch(h);
cciss_p600_dma_prefetch_quirk(h);
+ err = cciss_enter_simple_mode(h);
+ if (err)
+ goto err_out_free_res;
cciss_put_controller_into_performant_mode(h);
return 0;
@@ -4533,6 +4557,13 @@ static int cciss_controller_hard_reset(struct pci_dev *pdev,
pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
pmcsr |= PCI_D0;
pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
+
+ /*
+ * The P600 requires a small delay when changing states.
+ * Otherwise we may think the board did not reset and we bail.
+ * This for kdump only and is particular to the P600.
+ */
+ msleep(500);
}
return 0;
}
@@ -4843,20 +4874,20 @@ static int cciss_request_irq(ctlr_info_t *h,
irqreturn_t (*intxhandler)(int, void *))
{
if (h->msix_vector || h->msi_vector) {
- if (!request_irq(h->intr[PERF_MODE_INT], msixhandler,
+ if (!request_irq(h->intr[h->intr_mode], msixhandler,
IRQF_DISABLED, h->devname, h))
return 0;
dev_err(&h->pdev->dev, "Unable to get msi irq %d"
- " for %s\n", h->intr[PERF_MODE_INT],
+ " for %s\n", h->intr[h->intr_mode],
h->devname);
return -1;
}
- if (!request_irq(h->intr[PERF_MODE_INT], intxhandler,
+ if (!request_irq(h->intr[h->intr_mode], intxhandler,
IRQF_DISABLED, h->devname, h))
return 0;
dev_err(&h->pdev->dev, "Unable to get irq %d for %s\n",
- h->intr[PERF_MODE_INT], h->devname);
+ h->intr[h->intr_mode], h->devname);
return -1;
}
@@ -4887,7 +4918,7 @@ static void cciss_undo_allocations_after_kdump_soft_reset(ctlr_info_t *h)
{
int ctlr = h->ctlr;
- free_irq(h->intr[PERF_MODE_INT], h);
+ free_irq(h->intr[h->intr_mode], h);
#ifdef CONFIG_PCI_MSI
if (h->msix_vector)
pci_disable_msix(h->pdev);
@@ -4953,6 +4984,7 @@ reinit_after_soft_reset:
h = hba[i];
h->pdev = pdev;
h->busy_initializing = 1;
+ h->intr_mode = cciss_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
INIT_LIST_HEAD(&h->cmpQ);
INIT_LIST_HEAD(&h->reqQ);
mutex_init(&h->busy_shutting_down);
@@ -5009,7 +5041,7 @@ reinit_after_soft_reset:
dev_info(&h->pdev->dev, "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
h->devname, pdev->device, pci_name(pdev),
- h->intr[PERF_MODE_INT], dac ? "" : " not");
+ h->intr[h->intr_mode], dac ? "" : " not");
if (cciss_allocate_cmd_pool(h))
goto clean4;
@@ -5056,7 +5088,7 @@ reinit_after_soft_reset:
spin_lock_irqsave(&h->lock, flags);
h->access.set_intr_mask(h, CCISS_INTR_OFF);
spin_unlock_irqrestore(&h->lock, flags);
- free_irq(h->intr[PERF_MODE_INT], h);
+ free_irq(h->intr[h->intr_mode], h);
rc = cciss_request_irq(h, cciss_msix_discard_completions,
cciss_intx_discard_completions);
if (rc) {
@@ -5133,7 +5165,7 @@ clean4:
cciss_free_cmd_pool(h);
cciss_free_scatterlists(h);
cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
- free_irq(h->intr[PERF_MODE_INT], h);
+ free_irq(h->intr[h->intr_mode], h);
clean2:
unregister_blkdev(h->major, h->devname);
clean1:
@@ -5172,9 +5204,31 @@ static void cciss_shutdown(struct pci_dev *pdev)
if (return_code != IO_OK)
dev_warn(&h->pdev->dev, "Error flushing cache\n");
h->access.set_intr_mask(h, CCISS_INTR_OFF);
- free_irq(h->intr[PERF_MODE_INT], h);
+ free_irq(h->intr[h->intr_mode], h);
+}
+
+static int __devinit cciss_enter_simple_mode(struct ctlr_info *h)
+{
+ u32 trans_support;
+
+ trans_support = readl(&(h->cfgtable->TransportSupport));
+ if (!(trans_support & SIMPLE_MODE))
+ return -ENOTSUPP;
+
+ h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
+ writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
+ writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
+ cciss_wait_for_mode_change_ack(h);
+ print_cfg_table(h);
+ if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
+ dev_warn(&h->pdev->dev, "unable to get board into simple mode\n");
+ return -ENODEV;
+ }
+ h->transMethod = CFGTBL_Trans_Simple;
+ return 0;
}
+
static void __devexit cciss_remove_one(struct pci_dev *pdev)
{
ctlr_info_t *h;
drivers/block/cciss.h
View filediff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index c049548..7fda30e 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -92,6 +92,7 @@ struct ctlr_info
unsigned int intr[4];
unsigned int msix_vector;
unsigned int msi_vector;
+ int intr_mode;
int cciss_max_sectors;
BYTE cciss_read;
BYTE cciss_write;
drivers/block/cpqarray.c
View filediff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index b2fceb5..9125bbe 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -620,6 +620,7 @@ static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
}
vendor_id = pdev->vendor;
device_id = pdev->device;
+ revision = pdev->revision;
irq = pdev->irq;
for(i=0; i<6; i++)
@@ -632,7 +633,6 @@ static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
}
pci_read_config_word(pdev, PCI_COMMAND, &command);
- pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_timer);
drivers/block/loop.c
View filediff --git a/drivers/block/loop.c b/drivers/block/loop.c
index c77983e..3d80682 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -76,6 +76,8 @@
#include <linux/splice.h>
#include <linux/sysfs.h>
#include <linux/miscdevice.h>
+#include <linux/falloc.h>
+
#include <asm/uaccess.h>
static DEFINE_IDR(loop_index_idr);
@@ -407,6 +409,29 @@ static int do_bio_filebacked(struct loop_device *lo, struct bio *bio)
}
}
+ /*
+ * We use punch hole to reclaim the free space used by the
+ * image a.k.a. discard. However we do support discard if
+ * encryption is enabled, because it may give an attacker
+ * useful information.
+ */
+ if (bio->bi_rw & REQ_DISCARD) {
+ struct file *file = lo->lo_backing_file;
+ int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE;
+
+ if ((!file->f_op->fallocate) ||
+ lo->lo_encrypt_key_size) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+ ret = file->f_op->fallocate(file, mode, pos,
+ bio->bi_size);
+ if (unlikely(ret && ret != -EINVAL &&
+ ret != -EOPNOTSUPP))
+ ret = -EIO;
+ goto out;
+ }
+
ret = lo_send(lo, bio, pos);
if ((bio->bi_rw & REQ_FUA) && !ret) {
@@ -622,7 +647,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
goto out_putf;
fput(old_file);
- if (max_part > 0)
+ if (lo->lo_flags & LO_FLAGS_PARTSCAN)
ioctl_by_bdev(bdev, BLKRRPART, 0);
return 0;
@@ -699,16 +724,25 @@ static ssize_t loop_attr_autoclear_show(struct loop_device *lo, char *buf)
return sprintf(buf, "%s\n", autoclear ? "1" : "0");
}
+static ssize_t loop_attr_partscan_show(struct loop_device *lo, char *buf)
+{
+ int partscan = (lo->lo_flags & LO_FLAGS_PARTSCAN);
+
+ return sprintf(buf, "%s\n", partscan ? "1" : "0");
+}
+
LOOP_ATTR_RO(backing_file);
LOOP_ATTR_RO(offset);
LOOP_ATTR_RO(sizelimit);
LOOP_ATTR_RO(autoclear);
+LOOP_ATTR_RO(partscan);
static struct attribute *loop_attrs[] = {
&loop_attr_backing_file.attr,
&loop_attr_offset.attr,
&loop_attr_sizelimit.attr,
&loop_attr_autoclear.attr,
+ &loop_attr_partscan.attr,
NULL,
};
@@ -729,6 +763,35 @@ static void loop_sysfs_exit(struct loop_device *lo)
&loop_attribute_group);
}
+static void loop_config_discard(struct loop_device *lo)
+{
+ struct file *file = lo->lo_backing_file;
+ struct inode *inode = file->f_mapping->host;
+ struct request_queue *q = lo->lo_queue;
+
+ /*
+ * We use punch hole to reclaim the free space used by the
+ * image a.k.a. discard. However we do support discard if
+ * encryption is enabled, because it may give an attacker
+ * useful information.
+ */
+ if ((!file->f_op->fallocate) ||
+ lo->lo_encrypt_key_size) {
+ q->limits.discard_granularity = 0;
+ q->limits.discard_alignment = 0;
+ q->limits.max_discard_sectors = 0;
+ q->limits.discard_zeroes_data = 0;
+ queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q);
+ return;
+ }
+
+ q->limits.discard_granularity = inode->i_sb->s_blocksize;
+ q->limits.discard_alignment = inode->i_sb->s_blocksize;
+ q->limits.max_discard_sectors = UINT_MAX >> 9;
+ q->limits.discard_zeroes_data = 1;
+ queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
+}
+
static int loop_set_fd(struct loop_device *lo, fmode_t mode,
struct block_device *bdev, unsigned int arg)
{
@@ -829,7 +892,9 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
}
lo->lo_state = Lo_bound;
wake_up_process(lo->lo_thread);
- if (max_part > 0)
+ if (part_shift)
+ lo->lo_flags |= LO_FLAGS_PARTSCAN;
+ if (lo->lo_flags & LO_FLAGS_PARTSCAN)
ioctl_by_bdev(bdev, BLKRRPART, 0);
return 0;
@@ -890,10 +955,11 @@ loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer,
return err;
}
-static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
+static int loop_clr_fd(struct loop_device *lo)
{
struct file *filp = lo->lo_backing_file;
gfp_t gfp = lo->old_gfp_mask;
+ struct block_device *bdev = lo->lo_device;
if (lo->lo_state != Lo_bound)
return -ENXIO;
@@ -922,7 +988,6 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
lo->lo_offset = 0;
lo->lo_sizelimit = 0;
lo->lo_encrypt_key_size = 0;
- lo->lo_flags = 0;
lo->lo_thread = NULL;
memset(lo->lo_encrypt_key, 0, LO_KEY_SIZE);
memset(lo->lo_crypt_name, 0, LO_NAME_SIZE);
@@ -940,8 +1005,11 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
lo->lo_state = Lo_unbound;
/* This is safe: open() is still holding a reference. */
module_put(THIS_MODULE);
- if (max_part > 0 && bdev)
+ if (lo->lo_flags & LO_FLAGS_PARTSCAN && bdev)
ioctl_by_bdev(bdev, BLKRRPART, 0);
+ lo->lo_flags = 0;
+ if (!part_shift)
+ lo->lo_disk->flags |= GENHD_FL_NO_PART_SCAN;
mutex_unlock(&lo->lo_ctl_mutex);
/*
* Need not hold lo_ctl_mutex to fput backing file.
@@ -995,6 +1063,7 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
if (figure_loop_size(lo))
return -EFBIG;
}
+ loop_config_discard(lo);
memcpy(lo->lo_file_name, info->lo_file_name, LO_NAME_SIZE);
memcpy(lo->lo_crypt_name, info->lo_crypt_name, LO_NAME_SIZE);
@@ -1010,6 +1079,13 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
(info->lo_flags & LO_FLAGS_AUTOCLEAR))
lo->lo_flags ^= LO_FLAGS_AUTOCLEAR;
+ if ((info->lo_flags & LO_FLAGS_PARTSCAN) &&
+ !(lo->lo_flags & LO_FLAGS_PARTSCAN)) {
+ lo->lo_flags |= LO_FLAGS_PARTSCAN;
+ lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN;
+ ioctl_by_bdev(lo->lo_device, BLKRRPART, 0);
+ }
+
lo->lo_encrypt_key_size = info->lo_encrypt_key_size;
lo->lo_init[0] = info->lo_init[0];
lo->lo_init[1] = info->lo_init[1];
@@ -1203,7 +1279,7 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
break;
case LOOP_CLR_FD:
/* loop_clr_fd would have unlocked lo_ctl_mutex on success */
- err = loop_clr_fd(lo, bdev);
+ err = loop_clr_fd(lo);
if (!err)
goto out_unlocked;
break;
@@ -1423,7 +1499,7 @@ static int lo_release(struct gendisk *disk, fmode_t mode)
* In autoclear mode, stop the loop thread
* and remove configuration after last close.
*/
- err = loop_clr_fd(lo, NULL);
+ err = loop_clr_fd(lo);
if (!err)
goto out_unlocked;
} else {
@@ -1545,6 +1621,27 @@ static int loop_add(struct loop_device **l, int i)
if (!disk)
goto out_free_queue;
+ /*
+ * Disable partition scanning by default. The in-kernel partition
+ * scanning can be requested individually per-device during its
+ * setup. Userspace can always add and remove partitions from all
+ * devices. The needed partition minors are allocated from the
+ * extended minor space, the main loop device numbers will continue
+ * to match the loop minors, regardless of the number of partitions
+ * used.
+ *
+ * If max_part is given, partition scanning is globally enabled for
+ * all loop devices. The minors for the main loop devices will be
+ * multiples of max_part.
+ *
+ * Note: Global-for-all-devices, set-only-at-init, read-only module
+ * parameteters like 'max_loop' and 'max_part' make things needlessly
+ * complicated, are too static, inflexible and may surprise
+ * userspace tools. Parameters like this in general should be avoided.
+ */
+ if (!part_shift)
+ disk->flags |= GENHD_FL_NO_PART_SCAN;
+ disk->flags |= GENHD_FL_EXT_DEVT;
mutex_init(&lo->lo_ctl_mutex);
lo->lo_number = i;
lo->lo_thread = NULL;
drivers/block/nbd.c
View filediff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index f533f33..c3f0ee1 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -127,8 +127,7 @@ static void sock_shutdown(struct nbd_device *lo, int lock)
if (lock)
mutex_lock(&lo->tx_lock);
if (lo->sock) {
- printk(KERN_WARNING "%s: shutting down socket\n",
- lo->disk->disk_name);
+ dev_warn(disk_to_dev(lo->disk), "shutting down socket\n");
kernel_sock_shutdown(lo->sock, SHUT_RDWR);
lo->sock = NULL;
}
@@ -158,8 +157,9 @@ static int sock_xmit(struct nbd_device *lo, int send, void *buf, int size,
sigset_t blocked, oldset;
if (unlikely(!sock)) {
- printk(KERN_ERR "%s: Attempted %s on closed socket in sock_xmit\n",
- lo->disk->disk_name, (send ? "send" : "recv"));
+ dev_err(disk_to_dev(lo->disk),
+ "Attempted %s on closed socket in sock_xmit\n",
+ (send ? "send" : "recv"));
return -EINVAL;
}
@@ -250,8 +250,8 @@ static int nbd_send_req(struct nbd_device *lo, struct request *req)
result = sock_xmit(lo, 1, &request, sizeof(request),
(nbd_cmd(req) == NBD_CMD_WRITE) ? MSG_MORE : 0);
if (result <= 0) {
- printk(KERN_ERR "%s: Send control failed (result %d)\n",
- lo->disk->disk_name, result);
+ dev_err(disk_to_dev(lo->disk),
+ "Send control failed (result %d)\n", result);
goto error_out;
}
@@ -270,8 +270,9 @@ static int nbd_send_req(struct nbd_device *lo, struct request *req)
lo->disk->disk_name, req, bvec->bv_len);
result = sock_send_bvec(lo, bvec, flags);
if (result <= 0) {
- printk(KERN_ERR "%s: Send data failed (result %d)\n",
- lo->disk->disk_name, result);
+ dev_err(disk_to_dev(lo->disk),
+ "Send data failed (result %d)\n",
+ result);
goto error_out;
}
}
@@ -328,14 +329,13 @@ static struct request *nbd_read_stat(struct nbd_device *lo)
reply.magic = 0;
result = sock_xmit(lo, 0, &reply, sizeof(reply), MSG_WAITALL);
if (result <= 0) {
- printk(KERN_ERR "%s: Receive control failed (result %d)\n",
- lo->disk->disk_name, result);
+ dev_err(disk_to_dev(lo->disk),
+ "Receive control failed (result %d)\n", result);
goto harderror;
}
if (ntohl(reply.magic) != NBD_REPLY_MAGIC) {
- printk(KERN_ERR "%s: Wrong magic (0x%lx)\n",
- lo->disk->disk_name,
+ dev_err(disk_to_dev(lo->disk), "Wrong magic (0x%lx)\n",
(unsigned long)ntohl(reply.magic));
result = -EPROTO;
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drivers/block/xen-blkback/blkback.c
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drivers/block/xen-blkback/common.h
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drivers/block/xen-blkback/xenbus.c
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drivers/block/xen-blkfront.c
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drivers/scsi/hpsa.c
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fs/block_dev.c
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include/linux/genhd.h
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include/linux/loop.h
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include/xen/interface/io/blkif.h
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