it may have as many structures $<device>_info$ as there are minor devices
active. $Register_cdrom()$ builds a linked list from these.
-\subsection{$Int\ unregister_cdrom(struct\ cdrom_device_info * cdi)$}
+\subsection{$Void\ unregister_cdrom(struct\ cdrom_device_info * cdi)$}
Unregistering device $cdi$ with minor number $MINOR(cdi\to dev)$ removes
the minor device from the list. If it was the last registered minor for
bool "Enable the block layer" if EMBEDDED
default y
help
- This permits the block layer to be removed from the kernel if it's not
- needed (on some embedded devices for example). If this option is
- disabled, then blockdev files will become unusable and some
- filesystems (such as ext3) will become unavailable.
+ Provide block layer support for the kernel.
- This option will also disable SCSI character devices and USB storage
- since they make use of various block layer definitions and
- facilities.
+ Disable this option to remove the block layer support from the
+ kernel. This may be useful for embedded devices.
+
+ If this option is disabled:
+
+ - block device files will become unusable
+ - some filesystems (such as ext3) will become unavailable.
+
+ Also, SCSI character devices and USB storage will be disabled since
+ they make use of various block layer definitions and facilities.
Say Y here unless you know you really don't want to mount disks and
suchlike.
bool "Support for Large Block Devices"
depends on !64BIT
help
- Say Y here if you want to attach large (bigger than 2TB) discs to
- your machine, or if you want to have a raid or loopback device
- bigger than 2TB. Otherwise say N.
+ Enable block devices of size 2TB and larger.
+
+ This option is required to support the full capacity of large
+ (2TB+) block devices, including RAID, disk, Network Block Device,
+ Logical Volume Manager (LVM) and loopback.
+
+ For example, RAID devices are frequently bigger than the capacity
+ of the largest individual hard drive.
+
+ This option is not required if you have individual disk drives
+ which total 2TB+ and you are not aggregating the capacity into
+ a large block device (e.g. using RAID or LVM).
+
+ If unsure, say N.
config BLK_DEV_IO_TRACE
bool "Support for tracing block io actions"
select RELAY
select DEBUG_FS
help
- Say Y here, if you want to be able to trace the block layer actions
+ Say Y here if you want to be able to trace the block layer actions
on a given queue. Tracing allows you to see any traffic happening
- on a block device queue. For more information (and the user space
- support tools needed), fetch the blktrace app from:
+ on a block device queue. For more information (and the userspace
+ support tools needed), fetch the blktrace tools from:
git://git.kernel.dk/blktrace.git
+ If unsure, say N.
+
config LSF
bool "Support for Large Single Files"
depends on !64BIT
help
- Say Y here if you want to be able to handle very large files (bigger
- than 2TB), otherwise say N.
+ Say Y here if you want to be able to handle very large files (2TB
+ and larger), otherwise say N.
If unsure, say Y.
bool "Block layer SG support v4 (EXPERIMENTAL)"
depends on EXPERIMENTAL
---help---
- Saying Y here will enable generic SG (SCSI generic) v4 support
- for any block device.
-
- Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
- can handle complicated SCSI commands: tagged variable length cdbs
- with bidirectional data transfers and generic request/response
- protocols (e.g. Task Management Functions and SMP in Serial
- Attached SCSI).
+ Saying Y here will enable generic SG (SCSI generic) v4 support
+ for any block device.
+
+ Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
+ can handle complicated SCSI commands: tagged variable length cdbs
+ with bidirectional data transfers and generic request/response
+ protocols (e.g. Task Management Functions and SMP in Serial
+ Attached SCSI).
+
+ If unsure, say N.
endif # BLOCK
#include <linux/module.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
+#include <scsi/sg.h> /* for struct sg_iovec */
#include "blk.h"
ubuf += ret;
}
- /*
- * __blk_rq_map_user() copies the buffers if starting address
- * or length isn't aligned to dma_pad_mask. As the copied
- * buffer is always page aligned, we know that there's enough
- * room for padding. Extend the last bio and update
- * rq->data_len accordingly.
- *
- * On unmap, bio_uncopy_user() will use unmodified
- * bio_map_data pointed to by bio->bi_private.
- */
- if (len & q->dma_pad_mask) {
- unsigned int pad_len = (q->dma_pad_mask & ~len) + 1;
- struct bio *tail = rq->biotail;
-
- tail->bi_io_vec[tail->bi_vcnt - 1].bv_len += pad_len;
- tail->bi_size += pad_len;
-
- rq->extra_len += pad_len;
- }
+ if (!bio_flagged(bio, BIO_USER_MAPPED))
+ rq->cmd_flags |= REQ_COPY_USER;
rq->buffer = rq->data = NULL;
return 0;
struct sg_iovec *iov, int iov_count, unsigned int len)
{
struct bio *bio;
+ int i, read = rq_data_dir(rq) == READ;
+ int unaligned = 0;
if (!iov || iov_count <= 0)
return -EINVAL;
- /* we don't allow misaligned data like bio_map_user() does. If the
- * user is using sg, they're expected to know the alignment constraints
- * and respect them accordingly */
- bio = bio_map_user_iov(q, NULL, iov, iov_count,
- rq_data_dir(rq) == READ);
+ for (i = 0; i < iov_count; i++) {
+ unsigned long uaddr = (unsigned long)iov[i].iov_base;
+
+ if (uaddr & queue_dma_alignment(q)) {
+ unaligned = 1;
+ break;
+ }
+ }
+
+ if (unaligned || (q->dma_pad_mask & len))
+ bio = bio_copy_user_iov(q, iov, iov_count, read);
+ else
+ bio = bio_map_user_iov(q, NULL, iov, iov_count, read);
+
if (IS_ERR(bio))
return PTR_ERR(bio);
return -EINVAL;
}
+ if (!bio_flagged(bio, BIO_USER_MAPPED))
+ rq->cmd_flags |= REQ_COPY_USER;
+
bio_get(bio);
blk_rq_bio_prep(q, rq, bio);
rq->buffer = rq->data = NULL;
bvprv = bvec;
} /* segments in rq */
+
+ if (unlikely(rq->cmd_flags & REQ_COPY_USER) &&
+ (rq->data_len & q->dma_pad_mask)) {
+ unsigned int pad_len = (q->dma_pad_mask & ~rq->data_len) + 1;
+
+ sg->length += pad_len;
+ rq->extra_len += pad_len;
+ }
+
if (q->dma_drain_size && q->dma_drain_needed(rq)) {
if (rq->cmd_flags & REQ_RW)
memset(q->dma_drain_buffer, 0, q->dma_drain_size);
struct request_queue *q = disk->queue;
- if (!q || !q->request_fn)
+ if (WARN_ON(!q))
return -ENXIO;
+ if (!q->request_fn)
+ return 0;
+
ret = kobject_add(&q->kobj, kobject_get(&disk->dev.kobj),
"%s", "queue");
if (ret < 0)
{
struct request_queue *q = disk->queue;
- if (q && q->request_fn) {
+ if (WARN_ON(!q))
+ return;
+
+ if (q->request_fn) {
elv_unregister_queue(q);
kobject_uevent(&q->kobj, KOBJ_REMOVE);
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
h->drv[drv_index].busy_configuring = 1;
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+
+ /* deregister_disk sets h->drv[drv_index].queue = NULL */
+ /* which keeps the interrupt handler from starting */
+ /* the queue. */
ret = deregister_disk(h->gendisk[drv_index],
&h->drv[drv_index], 0);
h->drv[drv_index].busy_configuring = 0;
blk_queue_hardsect_size(disk->queue,
hba[ctlr]->drv[drv_index].block_size);
+ /* Make sure all queue data is written out before */
+ /* setting h->drv[drv_index].queue, as setting this */
+ /* allows the interrupt handler to start the queue */
+ wmb();
h->drv[drv_index].queue = disk->queue;
add_disk(disk);
}
continue;
blk_queue_hardsect_size(q, drv->block_size);
set_capacity(disk, drv->nr_blocks);
- add_disk(disk);
j++;
} while (j <= hba[i]->highest_lun);
+ /* Make sure all queue data is written out before */
+ /* interrupt handler, triggered by add_disk, */
+ /* is allowed to start them. */
+ wmb();
+
+ for (j = 0; j <= hba[i]->highest_lun; j++)
+ add_disk(hba[i]->gendisk[j]);
+
return 1;
clean4:
/* set scsi_host to NULL so our detect routine will
find us on register */
sa->scsi_host = NULL;
+ spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
scsi_cmd_stack_free(ctlr);
kfree(sa);
- spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
}
static int
static LIST_HEAD(loop_devices);
static DEFINE_MUTEX(loop_devices_mutex);
+static int max_part;
+static int part_shift;
+
/*
* Transfer functions
*/
goto out_putf;
fput(old_file);
+ if (max_part > 0)
+ ioctl_by_bdev(bdev, BLKRRPART, 0);
return 0;
out_putf:
}
lo->lo_state = Lo_bound;
wake_up_process(lo->lo_thread);
+ if (max_part > 0)
+ ioctl_by_bdev(bdev, BLKRRPART, 0);
return 0;
out_clr:
fput(filp);
/* This is safe: open() is still holding a reference. */
module_put(THIS_MODULE);
+ if (max_part > 0)
+ ioctl_by_bdev(bdev, BLKRRPART, 0);
return 0;
}
static int max_loop;
module_param(max_loop, int, 0);
MODULE_PARM_DESC(max_loop, "Maximum number of loop devices");
+module_param(max_part, int, 0);
+MODULE_PARM_DESC(max_part, "Maximum number of partitions per loop device");
MODULE_LICENSE("GPL");
MODULE_ALIAS_BLOCKDEV_MAJOR(LOOP_MAJOR);
if (!lo->lo_queue)
goto out_free_dev;
- disk = lo->lo_disk = alloc_disk(1);
+ disk = lo->lo_disk = alloc_disk(1 << part_shift);
if (!disk)
goto out_free_queue;
init_waitqueue_head(&lo->lo_event);
spin_lock_init(&lo->lo_lock);
disk->major = LOOP_MAJOR;
- disk->first_minor = i;
+ disk->first_minor = i << part_shift;
disk->fops = &lo_fops;
disk->private_data = lo;
disk->queue = lo->lo_queue;
* themselves and have kernel automatically instantiate actual
* device on-demand.
*/
- if (max_loop > 1UL << MINORBITS)
+
+ part_shift = 0;
+ if (max_part > 0)
+ part_shift = fls(max_part);
+
+ if (max_loop > 1UL << (MINORBITS - part_shift))
return -EINVAL;
if (max_loop) {
range = max_loop;
} else {
nr = 8;
- range = 1UL << MINORBITS;
+ range = 1UL << (MINORBITS - part_shift);
}
if (register_blkdev(LOOP_MAJOR, "loop"))
unsigned long range;
struct loop_device *lo, *next;
- range = max_loop ? max_loop : 1UL << MINORBITS;
+ range = max_loop ? max_loop : 1UL << (MINORBITS - part_shift);
list_for_each_entry_safe(lo, next, &loop_devices, lo_list)
loop_del_one(lo);
/* note: prints function name for you */
#ifdef CARM_DEBUG
-#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
+#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
#ifdef CARM_VERBOSE_DEBUG
-#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
+#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
#else
#define VPRINTK(fmt, args...)
#endif /* CARM_VERBOSE_DEBUG */
#define assert(expr) \
if(unlikely(!(expr))) { \
printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
- #expr,__FILE__,__FUNCTION__,__LINE__); \
+ #expr, __FILE__, __func__, __LINE__); \
}
#endif
static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
-#ifdef CONFIG_SYSCTL
static void cdrom_sysctl_register(void);
-#endif /* CONFIG_SYSCTL */
-static struct cdrom_device_info *topCdromPtr;
+
+static LIST_HEAD(cdrom_list);
static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
struct packet_command *cgc)
cdinfo(CD_OPEN, "entering register_cdrom\n");
if (cdo->open == NULL || cdo->release == NULL)
- return -2;
+ return -EINVAL;
if (!banner_printed) {
printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
banner_printed = 1;
-#ifdef CONFIG_SYSCTL
cdrom_sysctl_register();
-#endif /* CONFIG_SYSCTL */
}
ENSURE(drive_status, CDC_DRIVE_STATUS );
cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
mutex_lock(&cdrom_mutex);
- cdi->next = topCdromPtr;
- topCdromPtr = cdi;
+ list_add(&cdi->list, &cdrom_list);
mutex_unlock(&cdrom_mutex);
return 0;
}
#undef ENSURE
-int unregister_cdrom(struct cdrom_device_info *unreg)
+void unregister_cdrom(struct cdrom_device_info *cdi)
{
- struct cdrom_device_info *cdi, *prev;
cdinfo(CD_OPEN, "entering unregister_cdrom\n");
- prev = NULL;
mutex_lock(&cdrom_mutex);
- cdi = topCdromPtr;
- while (cdi && cdi != unreg) {
- prev = cdi;
- cdi = cdi->next;
- }
-
- if (cdi == NULL) {
- mutex_unlock(&cdrom_mutex);
- return -2;
- }
- if (prev)
- prev->next = cdi->next;
- else
- topCdromPtr = cdi->next;
-
+ list_del(&cdi->list);
mutex_unlock(&cdrom_mutex);
if (cdi->exit)
cdi->ops->n_minors--;
cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
- return 0;
}
int cdrom_get_media_event(struct cdrom_device_info *cdi,
struct media_event_desc *med)
{
struct packet_command cgc;
- unsigned char buffer[8];
- struct event_header *eh = (struct event_header *) buffer;
+ unsigned char *buffer;
+ struct event_header *eh;
+ int ret = 1;
- init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+ buffer = kmalloc(8, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ eh = (struct event_header *)buffer;
+
+ init_cdrom_command(&cgc, buffer, 8, CGC_DATA_READ);
cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
cgc.cmd[1] = 1; /* IMMED */
cgc.cmd[4] = 1 << 4; /* media event */
- cgc.cmd[8] = sizeof(buffer);
+ cgc.cmd[8] = 8;
cgc.quiet = 1;
if (cdi->ops->generic_packet(cdi, &cgc))
- return 1;
+ goto err;
if (be16_to_cpu(eh->data_len) < sizeof(*med))
- return 1;
+ goto err;
if (eh->nea || eh->notification_class != 0x4)
- return 1;
+ goto err;
- memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
- return 0;
+ memcpy(med, buffer + sizeof(*eh), sizeof(*med));
+ ret = 0;
+err:
+ kfree(buffer);
+ return ret;
}
/*
static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
{
struct packet_command cgc;
- char buffer[16];
+ char *buffer;
+ int ret = 1;
- init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+ buffer = kmalloc(16, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
cgc.timeout = HZ;
cgc.quiet = 1;
if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
cdi->mrw_mode_page = MRW_MODE_PC;
- return 0;
+ ret = 0;
} else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
- return 0;
+ ret = 0;
}
-
- return 1;
+ kfree(buffer);
+ return ret;
}
static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
{
struct packet_command cgc;
struct mrw_feature_desc *mfd;
- unsigned char buffer[16];
+ unsigned char *buffer;
int ret;
*write = 0;
+ buffer = kmalloc(16, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
- init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+ init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
cgc.cmd[3] = CDF_MRW;
- cgc.cmd[8] = sizeof(buffer);
+ cgc.cmd[8] = 16;
cgc.quiet = 1;
if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
- if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
- return 1;
+ if (be16_to_cpu(mfd->feature_code) != CDF_MRW) {
+ ret = 1;
+ goto err;
+ }
*write = mfd->write;
if ((ret = cdrom_mrw_probe_pc(cdi))) {
*write = 0;
- return ret;
}
-
- return 0;
+err:
+ kfree(buffer);
+ return ret;
}
static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
{
struct packet_command cgc;
- unsigned char buffer[12];
+ unsigned char *buffer;
int ret;
printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
+ buffer = kmalloc(12, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
/*
* FmtData bit set (bit 4), format type is 1
*/
- init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
+ init_cdrom_command(&cgc, buffer, 12, CGC_DATA_WRITE);
cgc.cmd[0] = GPCMD_FORMAT_UNIT;
cgc.cmd[1] = (1 << 4) | 1;
if (ret)
printk(KERN_INFO "cdrom: bgformat failed\n");
+ kfree(buffer);
return ret;
}
{
struct packet_command cgc;
struct mode_page_header *mph;
- char buffer[16];
+ char *buffer;
int ret, offset, size;
- init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+ buffer = kmalloc(16, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
- cgc.buffer = buffer;
- cgc.buflen = sizeof(buffer);
+ init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
- return ret;
+ goto err;
mph = (struct mode_page_header *) buffer;
offset = be16_to_cpu(mph->desc_length);
cgc.buflen = size;
if ((ret = cdrom_mode_select(cdi, &cgc)))
- return ret;
+ goto err;
printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
- return 0;
+ ret = 0;
+err:
+ kfree(buffer);
+ return ret;
}
static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
struct rwrt_feature_desc *rfd)
{
struct packet_command cgc;
- char buffer[24];
+ char *buffer;
int ret;
- init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+ buffer = kmalloc(24, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ init_cdrom_command(&cgc, buffer, 24, CGC_DATA_READ);
cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
- cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
+ cgc.cmd[8] = 24; /* often 0x18 */
cgc.quiet = 1;
if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
- return 0;
+ ret = 0;
+err:
+ kfree(buffer);
+ return ret;
}
static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
{
struct packet_command cgc;
- char buffer[16];
+ char *buffer;
__be16 *feature_code;
int ret;
- init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+ buffer = kmalloc(16, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
cgc.cmd[3] = CDF_HWDM;
- cgc.cmd[8] = sizeof(buffer);
+ cgc.cmd[8] = 16;
cgc.quiet = 1;
if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
if (be16_to_cpu(*feature_code) == CDF_HWDM)
- return 0;
-
- return 1;
+ ret = 0;
+err:
+ kfree(buffer);
+ return ret;
}
static int mo_open_write(struct cdrom_device_info *cdi)
{
struct packet_command cgc;
- char buffer[255];
+ char *buffer;
int ret;
- init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
+ buffer = kmalloc(255, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ init_cdrom_command(&cgc, buffer, 4, CGC_DATA_READ);
cgc.quiet = 1;
/*
}
/* drive gave us no info, let the user go ahead */
- if (ret)
- return 0;
+ if (ret) {
+ ret = 0;
+ goto err;
+ }
- return buffer[3] & 0x80;
+ ret = buffer[3] & 0x80;
+err:
+ kfree(buffer);
+ return ret;
}
static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
{
struct packet_command cgc;
- char buffer[32];
+ char *buffer;
int ret, mmc3_profile;
- init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+ buffer = kmalloc(32, GFP_KERNEL);
+ if (!buffer)
+ return;
+
+ init_cdrom_command(&cgc, buffer, 32, CGC_DATA_READ);
cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
cgc.cmd[1] = 0;
cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
- cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
+ cgc.cmd[8] = 32; /* Allocation Length */
cgc.quiet = 1;
if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
mmc3_profile = (buffer[6] << 8) | buffer[7];
cdi->mmc3_profile = mmc3_profile;
+ kfree(buffer);
}
static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
{
int ret;
- u_char buf[20];
+ u_char *buf;
struct packet_command cgc;
struct cdrom_device_ops *cdo = cdi->ops;
- rpc_state_t rpc_state;
+ rpc_state_t *rpc_state;
+
+ buf = kzalloc(20, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
- memset(buf, 0, sizeof(buf));
init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
switch (ai->type) {
setup_report_key(&cgc, ai->lsa.agid, 0);
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
ai->lsa.agid = buf[7] >> 6;
/* Returning data, let host change state */
setup_report_key(&cgc, ai->lsk.agid, 2);
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
copy_key(ai->lsk.key, &buf[4]);
/* Returning data, let host change state */
setup_report_key(&cgc, ai->lsc.agid, 1);
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
copy_chal(ai->lsc.chal, &buf[4]);
/* Returning data, let host change state */
cgc.cmd[2] = ai->lstk.lba >> 24;
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
ai->lstk.cpm = (buf[4] >> 7) & 1;
ai->lstk.cp_sec = (buf[4] >> 6) & 1;
setup_report_key(&cgc, ai->lsasf.agid, 5);
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
ai->lsasf.asf = buf[7] & 1;
break;
copy_chal(&buf[4], ai->hsc.chal);
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
ai->type = DVD_LU_SEND_KEY1;
break;
if ((ret = cdo->generic_packet(cdi, &cgc))) {
ai->type = DVD_AUTH_FAILURE;
- return ret;
+ goto err;
}
ai->type = DVD_AUTH_ESTABLISHED;
break;
cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
setup_report_key(&cgc, ai->lsa.agid, 0x3f);
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
break;
/* Get region settings */
case DVD_LU_SEND_RPC_STATE:
cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
setup_report_key(&cgc, 0, 8);
- memset(&rpc_state, 0, sizeof(rpc_state_t));
- cgc.buffer = (char *) &rpc_state;
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
- ai->lrpcs.type = rpc_state.type_code;
- ai->lrpcs.vra = rpc_state.vra;
- ai->lrpcs.ucca = rpc_state.ucca;
- ai->lrpcs.region_mask = rpc_state.region_mask;
- ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
+ rpc_state = (rpc_state_t *)buf;
+ ai->lrpcs.type = rpc_state->type_code;
+ ai->lrpcs.vra = rpc_state->vra;
+ ai->lrpcs.ucca = rpc_state->ucca;
+ ai->lrpcs.region_mask = rpc_state->region_mask;
+ ai->lrpcs.rpc_scheme = rpc_state->rpc_scheme;
break;
/* Set region settings */
buf[4] = ai->hrpcs.pdrc;
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
break;
default:
cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
- return -ENOTTY;
+ ret = -ENOTTY;
+ goto err;
}
-
- return 0;
+ ret = 0;
+err:
+ kfree(buf);
+ return ret;
}
static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
{
- unsigned char buf[21], *base;
+ unsigned char *buf, *base;
struct dvd_layer *layer;
struct packet_command cgc;
struct cdrom_device_ops *cdo = cdi->ops;
if (layer_num >= DVD_LAYERS)
return -EINVAL;
- init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
+ buf = kmalloc(21, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ init_cdrom_command(&cgc, buf, 21, CGC_DATA_READ);
cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
cgc.cmd[6] = layer_num;
cgc.cmd[7] = s->type;
cgc.quiet = 1;
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
base = &buf[4];
layer = &s->physical.layer[layer_num];
layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
layer->bca = base[16] >> 7;
- return 0;
+ ret = 0;
+err:
+ kfree(buf);
+ return ret;
}
static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
{
int ret;
- u_char buf[8];
+ u_char *buf;
struct packet_command cgc;
struct cdrom_device_ops *cdo = cdi->ops;
- init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
+ buf = kmalloc(8, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ init_cdrom_command(&cgc, buf, 8, CGC_DATA_READ);
cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
cgc.cmd[6] = s->copyright.layer_num;
cgc.cmd[7] = s->type;
cgc.cmd[9] = cgc.buflen & 0xff;
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
s->copyright.cpst = buf[4];
s->copyright.rmi = buf[5];
- return 0;
+ ret = 0;
+err:
+ kfree(buf);
+ return ret;
}
static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
{
int ret;
- u_char buf[4 + 188];
+ u_char *buf;
struct packet_command cgc;
struct cdrom_device_ops *cdo = cdi->ops;
- init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
+ buf = kmalloc(4 + 188, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ init_cdrom_command(&cgc, buf, 4 + 188, CGC_DATA_READ);
cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
cgc.cmd[7] = s->type;
cgc.cmd[9] = cgc.buflen & 0xff;
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
s->bca.len = buf[0] << 8 | buf[1];
if (s->bca.len < 12 || s->bca.len > 188) {
cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
- return -EIO;
+ ret = -EIO;
+ goto err;
}
memcpy(s->bca.value, &buf[4], s->bca.len);
-
- return 0;
+ ret = 0;
+err:
+ kfree(buf);
+ return ret;
}
static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
{
struct cdrom_device_ops *cdo = cdi->ops;
struct packet_command cgc;
- char buffer[32];
+ char *buffer;
int ret;
+ buffer = kmalloc(32, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
cgc.cmd[1] = 2; /* MSF addressing */
cgc.cmd[8] = 16;
if ((ret = cdo->generic_packet(cdi, &cgc)))
- return ret;
+ goto err;
subchnl->cdsc_audiostatus = cgc.buffer[1];
subchnl->cdsc_format = CDROM_MSF;
subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
- return 0;
+ ret = 0;
+err:
+ kfree(buffer);
+ return ret;
}
/*
*pos += ret;
- for (cdi = topCdromPtr; cdi; cdi = cdi->next) {
+ list_for_each_entry(cdi, &cdrom_list, list) {
switch (option) {
case CTL_NAME:
ret = scnprintf(info + *pos, max_size - *pos,
{
struct cdrom_device_info *cdi;
- for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) {
+ mutex_lock(&cdrom_mutex);
+ list_for_each_entry(cdi, &cdrom_list, list) {
if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
cdi->options |= CDO_AUTO_CLOSE;
else if (!autoclose)
else
cdi->options &= ~CDO_CHECK_TYPE;
}
+ mutex_unlock(&cdrom_mutex);
}
static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
unregister_sysctl_table(cdrom_sysctl_header);
}
+#else /* CONFIG_SYSCTL */
+
+static void cdrom_sysctl_register(void)
+{
+}
+
+static void cdrom_sysctl_unregister(void)
+{
+}
+
#endif /* CONFIG_SYSCTL */
static int __init cdrom_init(void)
{
-#ifdef CONFIG_SYSCTL
cdrom_sysctl_register();
-#endif
+
return 0;
}
static void __exit cdrom_exit(void)
{
printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
-#ifdef CONFIG_SYSCTL
cdrom_sysctl_unregister();
-#endif
}
module_init(cdrom_init);
del_gendisk(gd.disk);
if (gdrom_major)
unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
- return unregister_cdrom(gd.cd_info);
+ unregister_cdrom(gd.cd_info);
+
+ return 0;
}
static struct platform_driver gdrom_driver = {
{
struct disk_info *d = &viocd_diskinfo[vdev->unit_address];
- if (unregister_cdrom(&d->viocd_info) != 0)
- printk(VIOCD_KERN_WARNING
- "Cannot unregister viocd CD-ROM %s!\n",
- d->viocd_info.name);
+ unregister_cdrom(&d->viocd_info);
del_gendisk(d->viocd_disk);
blk_cleanup_queue(d->viocd_disk->queue);
put_disk(d->viocd_disk);
kfree(info->buffer);
kfree(info->toc);
- if (devinfo->handle == drive && unregister_cdrom(devinfo))
- printk(KERN_ERR "%s: %s failed to unregister device from the cdrom "
- "driver.\n", __FUNCTION__, drive->name);
+ if (devinfo->handle == drive)
+ unregister_cdrom(devinfo);
drive->dsc_overlap = 0;
drive->driver_data = NULL;
blk_queue_prep_rq(drive->queue, NULL);
"Notifying upper driver of completion "
"(result %x)\n", cmd->result));
- good_bytes = scsi_bufflen(cmd) + cmd->request->extra_len;
+ good_bytes = scsi_bufflen(cmd);
if (cmd->request->cmd_type != REQ_TYPE_BLOCK_PC) {
drv = scsi_cmd_to_driver(cmd);
if (drv->done)
struct bio_map_data {
struct bio_vec *iovecs;
- void __user *userptr;
+ int nr_sgvecs;
+ struct sg_iovec *sgvecs;
};
-static void bio_set_map_data(struct bio_map_data *bmd, struct bio *bio)
+static void bio_set_map_data(struct bio_map_data *bmd, struct bio *bio,
+ struct sg_iovec *iov, int iov_count)
{
memcpy(bmd->iovecs, bio->bi_io_vec, sizeof(struct bio_vec) * bio->bi_vcnt);
+ memcpy(bmd->sgvecs, iov, sizeof(struct sg_iovec) * iov_count);
+ bmd->nr_sgvecs = iov_count;
bio->bi_private = bmd;
}
static void bio_free_map_data(struct bio_map_data *bmd)
{
kfree(bmd->iovecs);
+ kfree(bmd->sgvecs);
kfree(bmd);
}
-static struct bio_map_data *bio_alloc_map_data(int nr_segs)
+static struct bio_map_data *bio_alloc_map_data(int nr_segs, int iov_count)
{
struct bio_map_data *bmd = kmalloc(sizeof(*bmd), GFP_KERNEL);
return NULL;
bmd->iovecs = kmalloc(sizeof(struct bio_vec) * nr_segs, GFP_KERNEL);
- if (bmd->iovecs)
+ if (!bmd->iovecs) {
+ kfree(bmd);
+ return NULL;
+ }
+
+ bmd->sgvecs = kmalloc(sizeof(struct sg_iovec) * iov_count, GFP_KERNEL);
+ if (bmd->sgvecs)
return bmd;
+ kfree(bmd->iovecs);
kfree(bmd);
return NULL;
}
+static int __bio_copy_iov(struct bio *bio, struct sg_iovec *iov, int iov_count,
+ int uncopy)
+{
+ int ret = 0, i;
+ struct bio_vec *bvec;
+ int iov_idx = 0;
+ unsigned int iov_off = 0;
+ int read = bio_data_dir(bio) == READ;
+
+ __bio_for_each_segment(bvec, bio, i, 0) {
+ char *bv_addr = page_address(bvec->bv_page);
+ unsigned int bv_len = bvec->bv_len;
+
+ while (bv_len && iov_idx < iov_count) {
+ unsigned int bytes;
+ char *iov_addr;
+
+ bytes = min_t(unsigned int,
+ iov[iov_idx].iov_len - iov_off, bv_len);
+ iov_addr = iov[iov_idx].iov_base + iov_off;
+
+ if (!ret) {
+ if (!read && !uncopy)
+ ret = copy_from_user(bv_addr, iov_addr,
+ bytes);
+ if (read && uncopy)
+ ret = copy_to_user(iov_addr, bv_addr,
+ bytes);
+
+ if (ret)
+ ret = -EFAULT;
+ }
+
+ bv_len -= bytes;
+ bv_addr += bytes;
+ iov_addr += bytes;
+ iov_off += bytes;
+
+ if (iov[iov_idx].iov_len == iov_off) {
+ iov_idx++;
+ iov_off = 0;
+ }
+ }
+
+ if (uncopy)
+ __free_page(bvec->bv_page);
+ }
+
+ return ret;
+}
+
/**
* bio_uncopy_user - finish previously mapped bio
* @bio: bio being terminated
int bio_uncopy_user(struct bio *bio)
{
struct bio_map_data *bmd = bio->bi_private;
- const int read = bio_data_dir(bio) == READ;
- struct bio_vec *bvec;
- int i, ret = 0;
+ int ret;
- __bio_for_each_segment(bvec, bio, i, 0) {
- char *addr = page_address(bvec->bv_page);
- unsigned int len = bmd->iovecs[i].bv_len;
+ ret = __bio_copy_iov(bio, bmd->sgvecs, bmd->nr_sgvecs, 1);
- if (read && !ret && copy_to_user(bmd->userptr, addr, len))
- ret = -EFAULT;
-
- __free_page(bvec->bv_page);
- bmd->userptr += len;
- }
bio_free_map_data(bmd);
bio_put(bio);
return ret;
}
/**
- * bio_copy_user - copy user data to bio
+ * bio_copy_user_iov - copy user data to bio
* @q: destination block queue
- * @uaddr: start of user address
- * @len: length in bytes
+ * @iov: the iovec.
+ * @iov_count: number of elements in the iovec
* @write_to_vm: bool indicating writing to pages or not
*
* Prepares and returns a bio for indirect user io, bouncing data
* to/from kernel pages as necessary. Must be paired with
* call bio_uncopy_user() on io completion.
*/
-struct bio *bio_copy_user(struct request_queue *q, unsigned long uaddr,
- unsigned int len, int write_to_vm)
+struct bio *bio_copy_user_iov(struct request_queue *q, struct sg_iovec *iov,
+ int iov_count, int write_to_vm)
{
- unsigned long end = (uaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
- unsigned long start = uaddr >> PAGE_SHIFT;
struct bio_map_data *bmd;
struct bio_vec *bvec;
struct page *page;
struct bio *bio;
int i, ret;
+ int nr_pages = 0;
+ unsigned int len = 0;
- bmd = bio_alloc_map_data(end - start);
+ for (i = 0; i < iov_count; i++) {
+ unsigned long uaddr;
+ unsigned long end;
+ unsigned long start;
+
+ uaddr = (unsigned long)iov[i].iov_base;
+ end = (uaddr + iov[i].iov_len + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ start = uaddr >> PAGE_SHIFT;
+
+ nr_pages += end - start;
+ len += iov[i].iov_len;
+ }
+
+ bmd = bio_alloc_map_data(nr_pages, iov_count);
if (!bmd)
return ERR_PTR(-ENOMEM);
- bmd->userptr = (void __user *) uaddr;
-
ret = -ENOMEM;
- bio = bio_alloc(GFP_KERNEL, end - start);
+ bio = bio_alloc(GFP_KERNEL, nr_pages);
if (!bio)
goto out_bmd;
* success
*/
if (!write_to_vm) {
- char __user *p = (char __user *) uaddr;
-
- /*
- * for a write, copy in data to kernel pages
- */
- ret = -EFAULT;
- bio_for_each_segment(bvec, bio, i) {
- char *addr = page_address(bvec->bv_page);
-
- if (copy_from_user(addr, p, bvec->bv_len))
- goto cleanup;
- p += bvec->bv_len;
- }
+ ret = __bio_copy_iov(bio, iov, iov_count, 0);
+ if (ret)
+ goto cleanup;
}
- bio_set_map_data(bmd, bio);
+ bio_set_map_data(bmd, bio, iov, iov_count);
return bio;
cleanup:
bio_for_each_segment(bvec, bio, i)
return ERR_PTR(ret);
}
+/**
+ * bio_copy_user - copy user data to bio
+ * @q: destination block queue
+ * @uaddr: start of user address
+ * @len: length in bytes
+ * @write_to_vm: bool indicating writing to pages or not
+ *
+ * Prepares and returns a bio for indirect user io, bouncing data
+ * to/from kernel pages as necessary. Must be paired with
+ * call bio_uncopy_user() on io completion.
+ */
+struct bio *bio_copy_user(struct request_queue *q, unsigned long uaddr,
+ unsigned int len, int write_to_vm)
+{
+ struct sg_iovec iov;
+
+ iov.iov_base = (void __user *)uaddr;
+ iov.iov_len = len;
+
+ return bio_copy_user_iov(q, &iov, 1, write_to_vm);
+}
+
static struct bio *__bio_map_user_iov(struct request_queue *q,
struct block_device *bdev,
struct sg_iovec *iov, int iov_count,
extern void bio_set_pages_dirty(struct bio *bio);
extern void bio_check_pages_dirty(struct bio *bio);
extern struct bio *bio_copy_user(struct request_queue *, unsigned long, unsigned int, int);
+extern struct bio *bio_copy_user_iov(struct request_queue *, struct sg_iovec *,
+ int, int);
extern int bio_uncopy_user(struct bio *);
void zero_fill_bio(struct bio *bio);
__REQ_RW_SYNC, /* request is sync (O_DIRECT) */
__REQ_ALLOCED, /* request came from our alloc pool */
__REQ_RW_META, /* metadata io request */
+ __REQ_COPY_USER, /* contains copies of user pages */
__REQ_NR_BITS, /* stops here */
};
#define REQ_RW_SYNC (1 << __REQ_RW_SYNC)
#define REQ_ALLOCED (1 << __REQ_ALLOCED)
#define REQ_RW_META (1 << __REQ_RW_META)
+#define REQ_COPY_USER (1 << __REQ_COPY_USER)
#define BLK_MAX_CDB 16
* BLK_BOUNCE_ANY : don't bounce anything
* BLK_BOUNCE_ISA : bounce pages above ISA DMA boundary
*/
+
+#if BITS_PER_LONG == 32
#define BLK_BOUNCE_HIGH ((u64)blk_max_low_pfn << PAGE_SHIFT)
-#define BLK_BOUNCE_ANY ((u64)blk_max_pfn << PAGE_SHIFT)
+#else
+#define BLK_BOUNCE_HIGH -1ULL
+#endif
+#define BLK_BOUNCE_ANY (-1ULL)
#define BLK_BOUNCE_ISA (ISA_DMA_THRESHOLD)
/*
#ifdef __KERNEL__
#include <linux/fs.h> /* not really needed, later.. */
#include <linux/device.h>
+#include <linux/list.h>
struct packet_command
{
/* Uniform cdrom data structures for cdrom.c */
struct cdrom_device_info {
struct cdrom_device_ops *ops; /* link to device_ops */
- struct cdrom_device_info *next; /* next device_info for this major */
+ struct list_head list; /* linked list of all device_info */
struct gendisk *disk; /* matching block layer disk */
void *handle; /* driver-dependent data */
/* specifications */
extern int cdrom_media_changed(struct cdrom_device_info *);
extern int register_cdrom(struct cdrom_device_info *cdi);
-extern int unregister_cdrom(struct cdrom_device_info *cdi);
+extern void unregister_cdrom(struct cdrom_device_info *cdi);
typedef struct {
int data;
projects / ~andy / linux / commitdiff