Commit 86d9c070 authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'for-2.6.30' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.30' of git://git.kernel.dk/linux-2.6-block:
  Get rid of pdflush_operation() in emergency sync and remount
  btrfs: get rid of current_is_pdflush() in btrfs_btree_balance_dirty
  Move the default_backing_dev_info out of readahead.c and into backing-dev.c
  block: Repeated lines in switching-sched.txt
  bsg: Remove bogus check against request_queue->max_sectors
  block: WARN in __blk_put_request() for potential bio leak
  loop: fix circular locking in loop_clr_fd()
  loop: support barrier writes
  bsg: add support for tail queuing
  cpqarray: enable bus mastering
  block: genhd.h cleanup patch
  block: add private bio_set for bio integrity allocations
  block: genhd.h comment needs updating
  block: get rid of unused blkdev_free_rq() define
  block: remove various blk_queue_*() setting functions in blk_init_queue_node()
  cciss: add BUILD_BUG_ON() for catching bad CommandList_struct alignment
  block: don't create bio_vec slabs of less than the inline number
  block: cleanup bio_alloc_bioset()
parents 413e3376 a2a9537a
......@@ -35,9 +35,3 @@ noop anticipatory deadline [cfq]
# echo anticipatory > /sys/block/hda/queue/scheduler
# cat /sys/block/hda/queue/scheduler
noop [anticipatory] deadline cfq
Each io queue has a set of io scheduler tunables associated with it. These
tunables control how the io scheduler works. You can find these entries
in:
/sys/block/<device>/queue/iosched
......@@ -603,13 +603,10 @@ blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
q->queue_flags = QUEUE_FLAG_DEFAULT;
q->queue_lock = lock;
blk_queue_segment_boundary(q, BLK_SEG_BOUNDARY_MASK);
/*
* This also sets hw/phys segments, boundary and size
*/
blk_queue_make_request(q, __make_request);
blk_queue_max_segment_size(q, MAX_SEGMENT_SIZE);
blk_queue_max_hw_segments(q, MAX_HW_SEGMENTS);
blk_queue_max_phys_segments(q, MAX_PHYS_SEGMENTS);
q->sg_reserved_size = INT_MAX;
......@@ -735,7 +732,6 @@ static void freed_request(struct request_queue *q, int rw, int priv)
__freed_request(q, rw ^ 1);
}
#define blkdev_free_rq(list) list_entry((list)->next, struct request, queuelist)
/*
* Get a free request, queue_lock must be held.
* Returns NULL on failure, with queue_lock held.
......@@ -1066,6 +1062,9 @@ void __blk_put_request(struct request_queue *q, struct request *req)
elv_completed_request(q, req);
/* this is a bio leak */
WARN_ON(req->bio != NULL);
/*
* Request may not have originated from ll_rw_blk. if not,
* it didn't come out of our reserved rq pools
......
......@@ -403,6 +403,8 @@ static int attempt_merge(struct request_queue *q, struct request *req,
if (blk_rq_cpu_valid(next))
req->cpu = next->cpu;
/* owner-ship of bio passed from next to req */
next->bio = NULL;
__blk_put_request(q, next);
return 1;
}
......
......@@ -218,9 +218,6 @@ bsg_validate_sgv4_hdr(struct request_queue *q, struct sg_io_v4 *hdr, int *rw)
if (hdr->guard != 'Q')
return -EINVAL;
if (hdr->dout_xfer_len > (q->max_sectors << 9) ||
hdr->din_xfer_len > (q->max_sectors << 9))
return -EIO;
switch (hdr->protocol) {
case BSG_PROTOCOL_SCSI:
......@@ -353,6 +350,8 @@ static void bsg_rq_end_io(struct request *rq, int uptodate)
static void bsg_add_command(struct bsg_device *bd, struct request_queue *q,
struct bsg_command *bc, struct request *rq)
{
int at_head = (0 == (bc->hdr.flags & BSG_FLAG_Q_AT_TAIL));
/*
* add bc command to busy queue and submit rq for io
*/
......@@ -368,7 +367,7 @@ static void bsg_add_command(struct bsg_device *bd, struct request_queue *q,
dprintk("%s: queueing rq %p, bc %p\n", bd->name, rq, bc);
rq->end_io_data = bc;
blk_execute_rq_nowait(q, NULL, rq, 1, bsg_rq_end_io);
blk_execute_rq_nowait(q, NULL, rq, at_head, bsg_rq_end_io);
}
static struct bsg_command *bsg_next_done_cmd(struct bsg_device *bd)
......@@ -924,6 +923,7 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
struct request *rq;
struct bio *bio, *bidi_bio = NULL;
struct sg_io_v4 hdr;
int at_head;
u8 sense[SCSI_SENSE_BUFFERSIZE];
if (copy_from_user(&hdr, uarg, sizeof(hdr)))
......@@ -936,7 +936,9 @@ static long bsg_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
bio = rq->bio;
if (rq->next_rq)
bidi_bio = rq->next_rq->bio;
blk_execute_rq(bd->queue, NULL, rq, 0);
at_head = (0 == (hdr.flags & BSG_FLAG_Q_AT_TAIL));
blk_execute_rq(bd->queue, NULL, rq, at_head);
ret = blk_complete_sgv4_hdr_rq(rq, &hdr, bio, bidi_bio);
if (copy_to_user(uarg, &hdr, sizeof(hdr)))
......
......@@ -214,21 +214,10 @@ static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
return 0;
}
/*
* unmap a request that was previously mapped to this sg_io_hdr. handles
* both sg and non-sg sg_io_hdr.
*/
static int blk_unmap_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr)
{
blk_rq_unmap_user(rq->bio);
blk_put_request(rq);
return 0;
}
static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
struct bio *bio)
{
int r, ret = 0;
int ret = 0;
/*
* fill in all the output members
......@@ -253,12 +242,10 @@ static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
ret = -EFAULT;
}
rq->bio = bio;
r = blk_unmap_sghdr_rq(rq, hdr);
if (ret)
r = ret;
blk_rq_unmap_user(bio);
blk_put_request(rq);
return r;
return ret;
}
static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
......
......@@ -3898,6 +3898,13 @@ static struct pci_driver cciss_pci_driver = {
*/
static int __init cciss_init(void)
{
/*
* The hardware requires that commands are aligned on a 64-bit
* boundary. Given that we use pci_alloc_consistent() to allocate an
* array of them, the size must be a multiple of 8 bytes.
*/
BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
printk(KERN_INFO DRIVER_NAME "\n");
/* Register for our PCI devices */
......
......@@ -617,6 +617,7 @@ static int cpqarray_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
int i;
c->pci_dev = pdev;
pci_set_master(pdev);
if (pci_enable_device(pdev)) {
printk(KERN_ERR "cpqarray: Unable to Enable PCI device\n");
return -1;
......
......@@ -474,10 +474,35 @@ static int do_bio_filebacked(struct loop_device *lo, struct bio *bio)
int ret;
pos = ((loff_t) bio->bi_sector << 9) + lo->lo_offset;
if (bio_rw(bio) == WRITE)
if (bio_rw(bio) == WRITE) {
int barrier = bio_barrier(bio);
struct file *file = lo->lo_backing_file;
if (barrier) {
if (unlikely(!file->f_op->fsync)) {
ret = -EOPNOTSUPP;
goto out;
}
ret = vfs_fsync(file, file->f_path.dentry, 0);
if (unlikely(ret)) {
ret = -EIO;
goto out;
}
}
ret = lo_send(lo, bio, pos);
else
if (barrier && !ret) {
ret = vfs_fsync(file, file->f_path.dentry, 0);
if (unlikely(ret))
ret = -EIO;
}
} else
ret = lo_receive(lo, bio, lo->lo_blocksize, pos);
out:
return ret;
}
......@@ -826,6 +851,9 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
lo->lo_queue->queuedata = lo;
lo->lo_queue->unplug_fn = loop_unplug;
if (!(lo_flags & LO_FLAGS_READ_ONLY) && file->f_op->fsync)
blk_queue_ordered(lo->lo_queue, QUEUE_ORDERED_DRAIN, NULL);
set_capacity(lo->lo_disk, size);
bd_set_size(bdev, size << 9);
......@@ -941,11 +969,18 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
bd_set_size(bdev, 0);
mapping_set_gfp_mask(filp->f_mapping, gfp);
lo->lo_state = Lo_unbound;
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);
mutex_unlock(&lo->lo_ctl_mutex);
/*
* Need not hold lo_ctl_mutex to fput backing file.
* Calling fput holding lo_ctl_mutex triggers a circular
* lock dependency possibility warning as fput can take
* bd_mutex which is usually taken before lo_ctl_mutex.
*/
fput(filp);
return 0;
}
......@@ -1163,7 +1198,7 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
struct loop_device *lo = bdev->bd_disk->private_data;
int err;
mutex_lock(&lo->lo_ctl_mutex);
mutex_lock_nested(&lo->lo_ctl_mutex, 1);
switch (cmd) {
case LOOP_SET_FD:
err = loop_set_fd(lo, mode, bdev, arg);
......@@ -1172,7 +1207,10 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
err = loop_change_fd(lo, bdev, arg);
break;
case LOOP_CLR_FD:
/* loop_clr_fd would have unlocked lo_ctl_mutex on success */
err = loop_clr_fd(lo, bdev);
if (!err)
goto out_unlocked;
break;
case LOOP_SET_STATUS:
err = loop_set_status_old(lo, (struct loop_info __user *) arg);
......@@ -1190,6 +1228,8 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
err = lo->ioctl ? lo->ioctl(lo, cmd, arg) : -EINVAL;
}
mutex_unlock(&lo->lo_ctl_mutex);
out_unlocked:
return err;
}
......
......@@ -26,23 +26,23 @@
#include <linux/workqueue.h>
static struct kmem_cache *bio_integrity_slab __read_mostly;
static mempool_t *bio_integrity_pool;
static struct bio_set *integrity_bio_set;
static struct workqueue_struct *kintegrityd_wq;
/**
* bio_integrity_alloc_bioset - Allocate integrity payload and attach it to bio
* bio_integrity_alloc - Allocate integrity payload and attach it to bio
* @bio: bio to attach integrity metadata to
* @gfp_mask: Memory allocation mask
* @nr_vecs: Number of integrity metadata scatter-gather elements
* @bs: bio_set to allocate from
*
* Description: This function prepares a bio for attaching integrity
* metadata. nr_vecs specifies the maximum number of pages containing
* integrity metadata that can be attached.
*/
struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *bio,
gfp_t gfp_mask,
unsigned int nr_vecs,
struct bio_set *bs)
struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio,
gfp_t gfp_mask,
unsigned int nr_vecs)
{
struct bio_integrity_payload *bip;
struct bio_vec *iv;
......@@ -50,7 +50,7 @@ struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *bio,
BUG_ON(bio == NULL);
bip = mempool_alloc(bs->bio_integrity_pool, gfp_mask);
bip = mempool_alloc(bio_integrity_pool, gfp_mask);
if (unlikely(bip == NULL)) {
printk(KERN_ERR "%s: could not alloc bip\n", __func__);
return NULL;
......@@ -58,10 +58,10 @@ struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *bio,
memset(bip, 0, sizeof(*bip));
iv = bvec_alloc_bs(gfp_mask, nr_vecs, &idx, bs);
iv = bvec_alloc_bs(gfp_mask, nr_vecs, &idx, integrity_bio_set);
if (unlikely(iv == NULL)) {
printk(KERN_ERR "%s: could not alloc bip_vec\n", __func__);
mempool_free(bip, bs->bio_integrity_pool);
mempool_free(bip, bio_integrity_pool);
return NULL;
}
......@@ -72,35 +72,16 @@ struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *bio,
return bip;
}
EXPORT_SYMBOL(bio_integrity_alloc_bioset);
/**
* bio_integrity_alloc - Allocate integrity payload and attach it to bio
* @bio: bio to attach integrity metadata to
* @gfp_mask: Memory allocation mask
* @nr_vecs: Number of integrity metadata scatter-gather elements
*
* Description: This function prepares a bio for attaching integrity
* metadata. nr_vecs specifies the maximum number of pages containing
* integrity metadata that can be attached.
*/
struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio,
gfp_t gfp_mask,
unsigned int nr_vecs)
{
return bio_integrity_alloc_bioset(bio, gfp_mask, nr_vecs, fs_bio_set);
}
EXPORT_SYMBOL(bio_integrity_alloc);
/**
* bio_integrity_free - Free bio integrity payload
* @bio: bio containing bip to be freed
* @bs: bio_set this bio was allocated from
*
* Description: Used to free the integrity portion of a bio. Usually
* called from bio_free().
*/
void bio_integrity_free(struct bio *bio, struct bio_set *bs)
void bio_integrity_free(struct bio *bio)
{
struct bio_integrity_payload *bip = bio->bi_integrity;
......@@ -111,8 +92,8 @@ void bio_integrity_free(struct bio *bio, struct bio_set *bs)
&& bip->bip_buf != NULL)
kfree(bip->bip_buf);
bvec_free_bs(bs, bip->bip_vec, bip->bip_pool);
mempool_free(bip, bs->bio_integrity_pool);
bvec_free_bs(integrity_bio_set, bip->bip_vec, bip->bip_pool);
mempool_free(bip, bio_integrity_pool);
bio->bi_integrity = NULL;
}
......@@ -686,19 +667,17 @@ EXPORT_SYMBOL(bio_integrity_split);
* @bio: New bio
* @bio_src: Original bio
* @gfp_mask: Memory allocation mask
* @bs: bio_set to allocate bip from
*
* Description: Called to allocate a bip when cloning a bio
*/
int bio_integrity_clone(struct bio *bio, struct bio *bio_src,
gfp_t gfp_mask, struct bio_set *bs)
int bio_integrity_clone(struct bio *bio, struct bio *bio_src, gfp_t gfp_mask)
{
struct bio_integrity_payload *bip_src = bio_src->bi_integrity;
struct bio_integrity_payload *bip;
BUG_ON(bip_src == NULL);
bip = bio_integrity_alloc_bioset(bio, gfp_mask, bip_src->bip_vcnt, bs);
bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_vcnt);
if (bip == NULL)
return -EIO;
......@@ -714,37 +693,25 @@ int bio_integrity_clone(struct bio *bio, struct bio *bio_src,
}
EXPORT_SYMBOL(bio_integrity_clone);
int bioset_integrity_create(struct bio_set *bs, int pool_size)
static int __init bio_integrity_init(void)
{
bs->bio_integrity_pool = mempool_create_slab_pool(pool_size,
bio_integrity_slab);
if (!bs->bio_integrity_pool)
return -1;
return 0;
}
EXPORT_SYMBOL(bioset_integrity_create);
kintegrityd_wq = create_workqueue("kintegrityd");
void bioset_integrity_free(struct bio_set *bs)
{
if (bs->bio_integrity_pool)
mempool_destroy(bs->bio_integrity_pool);
}
EXPORT_SYMBOL(bioset_integrity_free);
if (!kintegrityd_wq)
panic("Failed to create kintegrityd\n");
void __init bio_integrity_init_slab(void)
{
bio_integrity_slab = KMEM_CACHE(bio_integrity_payload,
SLAB_HWCACHE_ALIGN|SLAB_PANIC);
}
static int __init integrity_init(void)
{
kintegrityd_wq = create_workqueue("kintegrityd");
bio_integrity_pool = mempool_create_slab_pool(BIO_POOL_SIZE,
bio_integrity_slab);
if (!bio_integrity_pool)
panic("bio_integrity: can't allocate bip pool\n");
if (!kintegrityd_wq)
panic("Failed to create kintegrityd\n");
integrity_bio_set = bioset_create(BIO_POOL_SIZE, 0);
if (!integrity_bio_set)
panic("bio_integrity: can't allocate bio_set\n");
return 0;
}
subsys_initcall(integrity_init);
subsys_initcall(bio_integrity_init);
......@@ -248,7 +248,7 @@ void bio_free(struct bio *bio, struct bio_set *bs)
bvec_free_bs(bs, bio->bi_io_vec, BIO_POOL_IDX(bio));
if (bio_integrity(bio))
bio_integrity_free(bio, bs);
bio_integrity_free(bio);
/*
* If we have front padding, adjust the bio pointer before freeing
......@@ -301,48 +301,51 @@ void bio_init(struct bio *bio)
**/
struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs)
{
struct bio_vec *bvl = NULL;
struct bio *bio = NULL;
void *uninitialized_var(p);
unsigned long idx = 0;
void *p = NULL;
if (bs) {
p = mempool_alloc(bs->bio_pool, gfp_mask);
if (p)
bio = p + bs->front_pad;
} else
if (!p)
goto err;
bio = p + bs->front_pad;
} else {
bio = kmalloc(sizeof(*bio), gfp_mask);
if (!bio)
goto err;
}
if (likely(bio)) {
struct bio_vec *bvl = NULL;
bio_init(bio);
if (likely(nr_iovecs)) {
unsigned long uninitialized_var(idx);
if (nr_iovecs <= BIO_INLINE_VECS) {
idx = 0;
bvl = bio->bi_inline_vecs;
nr_iovecs = BIO_INLINE_VECS;
} else {
bvl = bvec_alloc_bs(gfp_mask, nr_iovecs, &idx,
bs);
nr_iovecs = bvec_nr_vecs(idx);
}
if (unlikely(!bvl)) {
if (bs)
mempool_free(p, bs->bio_pool);
else
kfree(bio);
bio = NULL;
goto out;
}
bio->bi_flags |= idx << BIO_POOL_OFFSET;
bio->bi_max_vecs = nr_iovecs;
}
bio->bi_io_vec = bvl;
bio_init(bio);
if (unlikely(!nr_iovecs))
goto out_set;
if (nr_iovecs <= BIO_INLINE_VECS) {
bvl = bio->bi_inline_vecs;
nr_iovecs = BIO_INLINE_VECS;
} else {
bvl = bvec_alloc_bs(gfp_mask, nr_iovecs, &idx, bs);
if (unlikely(!bvl))
goto err_free;
nr_iovecs = bvec_nr_vecs(idx);
}
out:
bio->bi_flags |= idx << BIO_POOL_OFFSET;
bio->bi_max_vecs = nr_iovecs;
out_set:
bio->bi_io_vec = bvl;
return bio;
err_free:
if (bs)
mempool_free(p, bs->bio_pool);
else
kfree(bio);
err:
return NULL;
}
struct bio *bio_alloc(gfp_t gfp_mask, int nr_iovecs)
......@@ -463,7 +466,7 @@ struct bio *bio_clone(struct bio *bio, gfp_t gfp_mask)
if (bio_integrity(bio)) {
int ret;
ret = bio_integrity_clone(b, bio, gfp_mask, fs_bio_set);
ret = bio_integrity_clone(b, bio, gfp_mask);
if (ret < 0) {
bio_put(b);
......@@ -1526,7 +1529,6 @@ void bioset_free(struct bio_set *bs)
if (bs->bio_pool)
mempool_destroy(bs->bio_pool);
bioset_integrity_free(bs);
biovec_free_pools(bs);
bio_put_slab(bs);
......@@ -1567,9 +1569,6 @@ struct bio_set *bioset_create(unsigned int pool_size, unsigned int front_pad)
if (!bs->bio_pool)
goto bad;
if (bioset_integrity_create(bs, pool_size))
goto bad;
if (!biovec_create_pools(bs, pool_size))
return bs;
......@@ -1586,6 +1585,13 @@ static void __init biovec_init_slabs(void)
int size;
struct biovec_slab *bvs = bvec_slabs + i;
#ifndef CONFIG_BLK_DEV_INTEGRITY
if (bvs->nr_vecs <= BIO_INLINE_VECS) {
bvs->slab = NULL;
continue;
}
#endif
size = bvs->nr_vecs * sizeof(struct bio_vec);
bvs->slab = kmem_cache_create(bvs->name, size, 0,
SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
......@@ -1600,7 +1606,6 @@ static int __init init_bio(void)
if (!bio_slabs)
panic("bio: can't allocate bios\n");
bio_integrity_init_slab();
biovec_init_slabs();
fs_bio_set = bioset_create(BIO_POOL_SIZE, 0);
......
......@@ -2385,7 +2385,7 @@ void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
unsigned long thresh = 32 * 1024 * 1024;
tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree;
if (current_is_pdflush() || current->flags & PF_MEMALLOC)
if (current->flags & PF_MEMALLOC)
return;
num_dirty = count_range_bits(tree, &start, (u64)-1,
......
......@@ -674,7 +674,7 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force)
return 0;
}
static void do_emergency_remount(unsigned long foo)
static void do_emergency_remount(struct work_struct *work)
{
struct super_block *sb;
......@@ -697,12 +697,19 @@ static void do_emergency_remount(unsigned long foo)
spin_lock(&sb_lock);
}
spin_unlock(&sb_lock);
kfree(work);
printk("Emergency Remount complete\n");
}
void emergency_remount(void)
{
pdflush_operation(do_emergency_remount, 0);
struct work_struct *work;
work = kmalloc(sizeof(*work), GFP_ATOMIC);
if (work) {
INIT_WORK(work, do_emergency_remount);
schedule_work(work);
}
}
/*
......
......@@ -42,9 +42,21 @@ SYSCALL_DEFINE0(sync)
return 0;
}
static void do_sync_work(struct work_struct *work)
{
do_sync(0);
kfree(work);
}
void emergency_sync(void)
{
pdflush_operation(do_sync, 0);
struct work_struct *work;
work = kmalloc(sizeof(*work), GFP_ATOMIC);
if (work) {
INIT_WORK(work, do_sync_work);
schedule_work(work);
}
}
/*
......
......@@ -426,9 +426,6 @@ struct bio_set {
unsigned int front_pad;
mempool_t *bio_pool;
#if defined(CONFIG_BLK_DEV_INTEGRITY)
mempool_t *bio_integrity_pool;
#endif
mempool_t *bvec_pool;
};
......@@ -519,9 +516,8 @@ static inline int bio_has_data(struct bio *bio)
#define bio_integrity(bio) (bio->bi_integrity != NULL)
extern struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *, gfp_t, unsigned int, struct bio_set *);
extern struct bio_integrity_payload *bio_integrity_alloc(struct bio *, gfp_t, unsigned int);
extern void bio_integrity_free(struct bio *, struct bio_set *);
extern void bio_integrity_free(struct bio *);
extern int bio_integrity_add_page(struct bio *, struct page *, unsigned int, unsigned int);
extern int bio_integrity_enabled(struct bio *bio);
extern int bio_integrity_set_tag(struct bio *, void *, unsigned int);
......@@ -531,27 +527,21 @@ extern void bio_integrity_endio(struct bio *, int);
extern void bio_integrity_advance(struct bio *, unsigned int);
extern void bio_integrity_trim(struct bio *, unsigned int, unsigned int);
extern void bio_integrity_split(struct bio *, struct bio_pair *, int);
extern int bio_integrity_clone(struct bio *, struct bio *, gfp_t, struct bio_set *);
extern int bioset_integrity_create(struct bio_set *, int);
extern void bioset_integrity_free(struct bio_set *);
extern void bio_integrity_init_slab(void);
extern int bio_integrity_clone(struct bio *, struct bio *, gfp_t);
#else /* CONFIG_BLK_DEV_INTEGRITY */
#define bio_integrity(a) (0)
#define bioset_integrity_create(a, b) (0)
#define bio_integrity_prep(a) (0)
#define bio_integrity_enabled(a) (0)
#define bio_integrity_clone(a, b, c,d ) (0)
#define bioset_integrity_free(a) do { } while (0)
#define bio_integrity_free(a, b) do { } while (0)
#define bio_integrity_clone(a, b, c) (0)
#define bio_integrity_free(a) do { } while (0)
#define bio_integrity_endio(a, b) do { } while (0)
#define bio_integrity_advance(a, b) do { } while (0)
#define bio_integrity_trim(a, b, c) do { } while (0)
#define bio_integrity_split(a, b, c) do { } while (0)
#define bio_integrity_set_tag(a, b, c) do { } while (0)
#define bio_integrity_get_tag(a, b, c) do { } while (0)
#define bio_integrity_init_slab(a) do { } while (0)
#endif /* CONFIG_BLK_DEV_INTEGRITY */
......
......@@ -7,6 +7,14 @@
#define BSG_SUB_PROTOCOL_SCSI_TMF 1
#define BSG_SUB_PROTOCOL_SCSI_TRANSPORT 2
/*
* For flags member below
* sg.h sg_io_hdr also has bits defined for it's flags member. However
* none of these bits are implemented/used by bsg. The bits below are
* allocated to not conflict with sg.h ones anyway.
*/
#define BSG_FLAG_Q_AT_TAIL 0x10 /* default, == 0 at this bit, is Q_AT_HEAD */
struct sg_io_v4 {
__s32 guard; /* [i] 'Q' to differentiate from v3 */
__u32 protocol; /* [i] 0 -> SCSI , .... */
......
......@@ -333,11 +333,10 @@ static inline void part_dec_in_flight(struct hd_struct *part)
part_to_disk(part)->part0.in_flight--;
}
/* drivers/block/ll_rw_blk.c */
/* block/blk-core.c */
extern void part_round_stats(int cpu, struct hd_struct *part);
/* drivers/block/genhd.c */
extern int get_blkdev_list(char *, int);
/* block/genhd.c */
extern void add_disk(struct gendisk *disk);
extern void del_gendisk(struct gendisk *gp);
extern void unlink_gendisk(struct gendisk *gp);
......
......@@ -2,11 +2,24 @@
#include <linux/wait.h>
#include <linux/backing-dev.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/sched.h>
#include <linux/module.h>
#include <linux/writeback.h>
#include <linux/device.h>
void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
{
}
EXPORT_SYMBOL(default_unplug_io_fn);
struct backing_dev_info default_backing_dev_info = {
.ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE,
.state = 0,
.capabilities = BDI_CAP_MAP_COPY,
.unplug_io_fn = default_unplug_io_fn,
};
EXPORT_SYMBOL_GPL(default_backing_dev_info);
static struct class *bdi_class;
......@@ -166,9 +179,20 @@ static __init int bdi_class_init(void)
bdi_debug_init();
return 0;
}
postcore_initcall(bdi_class_init);
static int __init default_bdi_init(void)