summaryrefslogtreecommitdiffstats
path: root/drivers/block
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-11-04 17:06:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-04 17:06:58 -0700
commitb4fdcb02f1e39c27058a885905bd0277370ba441 (patch)
treefd4cfd1994f21f44afe5e7904681fb5ac09f81b8 /drivers/block
parent044595d4e448305fbaec472eb7d22636d24e7d8c (diff)
parent6dd9ad7df2019b1e33a372a501907db293ebcd0d (diff)
downloadop-kernel-dev-b4fdcb02f1e39c27058a885905bd0277370ba441.zip
op-kernel-dev-b4fdcb02f1e39c27058a885905bd0277370ba441.tar.gz
Merge branch 'for-3.2/core' of git://git.kernel.dk/linux-block
* 'for-3.2/core' of git://git.kernel.dk/linux-block: (29 commits) block: don't call blk_drain_queue() if elevator is not up blk-throttle: use queue_is_locked() instead of lockdep_is_held() blk-throttle: Take blkcg->lock while traversing blkcg->policy_list blk-throttle: Free up policy node associated with deleted rule block: warn if tag is greater than real_max_depth. block: make gendisk hold a reference to its queue blk-flush: move the queue kick into blk-flush: fix invalid BUG_ON in blk_insert_flush block: Remove the control of complete cpu from bio. block: fix a typo in the blk-cgroup.h file block: initialize the bounce pool if high memory may be added later block: fix request_queue lifetime handling by making blk_queue_cleanup() properly shutdown block: drop @tsk from attempt_plug_merge() and explain sync rules block: make get_request[_wait]() fail if queue is dead block: reorganize throtl_get_tg() and blk_throtl_bio() block: reorganize queue draining block: drop unnecessary blk_get/put_queue() in scsi_cmd_ioctl() and blk_get_tg() block: pass around REQ_* flags instead of broken down booleans during request alloc/free block: move blk_throtl prototypes to block/blk.h block: fix genhd refcounting in blkio_policy_parse_and_set() ... Fix up trivial conflicts due to "mddev_t" -> "struct mddev" conversion and making the request functions be of type "void" instead of "int" in - drivers/md/{faulty.c,linear.c,md.c,md.h,multipath.c,raid0.c,raid1.c,raid10.c,raid5.c} - drivers/staging/zram/zram_drv.c
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/aoe/aoeblk.c14
-rw-r--r--drivers/block/brd.c4
-rw-r--r--drivers/block/drbd/drbd_int.h2
-rw-r--r--drivers/block/drbd/drbd_req.c8
-rw-r--r--drivers/block/loop.c140
-rw-r--r--drivers/block/pktcdvd.c11
-rw-r--r--drivers/block/ps3vram.c6
-rw-r--r--drivers/block/umem.c4
8 files changed, 46 insertions, 143 deletions
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 528f631..167ba0a 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -159,7 +159,7 @@ aoeblk_release(struct gendisk *disk, fmode_t mode)
return 0;
}
-static int
+static void
aoeblk_make_request(struct request_queue *q, struct bio *bio)
{
struct sk_buff_head queue;
@@ -172,25 +172,25 @@ aoeblk_make_request(struct request_queue *q, struct bio *bio)
if (bio == NULL) {
printk(KERN_ERR "aoe: bio is NULL\n");
BUG();
- return 0;
+ return;
}
d = bio->bi_bdev->bd_disk->private_data;
if (d == NULL) {
printk(KERN_ERR "aoe: bd_disk->private_data is NULL\n");
BUG();
bio_endio(bio, -ENXIO);
- return 0;
+ return;
} else if (bio->bi_io_vec == NULL) {
printk(KERN_ERR "aoe: bi_io_vec is NULL\n");
BUG();
bio_endio(bio, -ENXIO);
- return 0;
+ return;
}
buf = mempool_alloc(d->bufpool, GFP_NOIO);
if (buf == NULL) {
printk(KERN_INFO "aoe: buf allocation failure\n");
bio_endio(bio, -ENOMEM);
- return 0;
+ return;
}
memset(buf, 0, sizeof(*buf));
INIT_LIST_HEAD(&buf->bufs);
@@ -211,7 +211,7 @@ aoeblk_make_request(struct request_queue *q, struct bio *bio)
spin_unlock_irqrestore(&d->lock, flags);
mempool_free(buf, d->bufpool);
bio_endio(bio, -ENXIO);
- return 0;
+ return;
}
list_add_tail(&buf->bufs, &d->bufq);
@@ -222,8 +222,6 @@ aoeblk_make_request(struct request_queue *q, struct bio *bio)
spin_unlock_irqrestore(&d->lock, flags);
aoenet_xmit(&queue);
-
- return 0;
}
static int
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index dba1c32..d22119d 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -323,7 +323,7 @@ out:
return err;
}
-static int brd_make_request(struct request_queue *q, struct bio *bio)
+static void brd_make_request(struct request_queue *q, struct bio *bio)
{
struct block_device *bdev = bio->bi_bdev;
struct brd_device *brd = bdev->bd_disk->private_data;
@@ -359,8 +359,6 @@ static int brd_make_request(struct request_queue *q, struct bio *bio)
out:
bio_endio(bio, err);
-
- return 0;
}
#ifdef CONFIG_BLK_DEV_XIP
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 1706d60..9cf2035 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1506,7 +1506,7 @@ extern void drbd_free_mdev(struct drbd_conf *mdev);
extern int proc_details;
/* drbd_req */
-extern int drbd_make_request(struct request_queue *q, struct bio *bio);
+extern void drbd_make_request(struct request_queue *q, struct bio *bio);
extern int drbd_read_remote(struct drbd_conf *mdev, struct drbd_request *req);
extern int drbd_merge_bvec(struct request_queue *q, struct bvec_merge_data *bvm, struct bio_vec *bvec);
extern int is_valid_ar_handle(struct drbd_request *, sector_t);
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 3424d67..4a0f314 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -1073,7 +1073,7 @@ static int drbd_fail_request_early(struct drbd_conf *mdev, int is_write)
return 0;
}
-int drbd_make_request(struct request_queue *q, struct bio *bio)
+void drbd_make_request(struct request_queue *q, struct bio *bio)
{
unsigned int s_enr, e_enr;
struct drbd_conf *mdev = (struct drbd_conf *) q->queuedata;
@@ -1081,7 +1081,7 @@ int drbd_make_request(struct request_queue *q, struct bio *bio)
if (drbd_fail_request_early(mdev, bio_data_dir(bio) & WRITE)) {
bio_endio(bio, -EPERM);
- return 0;
+ return;
}
start_time = jiffies;
@@ -1100,7 +1100,8 @@ int drbd_make_request(struct request_queue *q, struct bio *bio)
if (likely(s_enr == e_enr)) {
inc_ap_bio(mdev, 1);
- return drbd_make_request_common(mdev, bio, start_time);
+ drbd_make_request_common(mdev, bio, start_time);
+ return;
}
/* can this bio be split generically?
@@ -1148,7 +1149,6 @@ int drbd_make_request(struct request_queue *q, struct bio *bio)
bio_pair_release(bp);
}
- return 0;
}
/* This is called by bio_add_page(). With this function we reduce
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 4720c7a..c77983e 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -203,74 +203,6 @@ lo_do_transfer(struct loop_device *lo, int cmd,
}
/**
- * do_lo_send_aops - helper for writing data to a loop device
- *
- * This is the fast version for backing filesystems which implement the address
- * space operations write_begin and write_end.
- */
-static int do_lo_send_aops(struct loop_device *lo, struct bio_vec *bvec,
- loff_t pos, struct page *unused)
-{
- struct file *file = lo->lo_backing_file; /* kudos to NFsckingS */
- struct address_space *mapping = file->f_mapping;
- pgoff_t index;
- unsigned offset, bv_offs;
- int len, ret;
-
- mutex_lock(&mapping->host->i_mutex);
- index = pos >> PAGE_CACHE_SHIFT;
- offset = pos & ((pgoff_t)PAGE_CACHE_SIZE - 1);
- bv_offs = bvec->bv_offset;
- len = bvec->bv_len;
- while (len > 0) {
- sector_t IV;
- unsigned size, copied;
- int transfer_result;
- struct page *page;
- void *fsdata;
-
- IV = ((sector_t)index << (PAGE_CACHE_SHIFT - 9))+(offset >> 9);
- size = PAGE_CACHE_SIZE - offset;
- if (size > len)
- size = len;
-
- ret = pagecache_write_begin(file, mapping, pos, size, 0,
- &page, &fsdata);
- if (ret)
- goto fail;
-
- file_update_time(file);
-
- transfer_result = lo_do_transfer(lo, WRITE, page, offset,
- bvec->bv_page, bv_offs, size, IV);
- copied = size;
- if (unlikely(transfer_result))
- copied = 0;
-
- ret = pagecache_write_end(file, mapping, pos, size, copied,
- page, fsdata);
- if (ret < 0 || ret != copied)
- goto fail;
-
- if (unlikely(transfer_result))
- goto fail;
-
- bv_offs += copied;
- len -= copied;
- offset = 0;
- index++;
- pos += copied;
- }
- ret = 0;
-out:
- mutex_unlock(&mapping->host->i_mutex);
- return ret;
-fail:
- ret = -1;
- goto out;
-}
-
-/**
* __do_lo_send_write - helper for writing data to a loop device
*
* This helper just factors out common code between do_lo_send_direct_write()
@@ -297,10 +229,8 @@ static int __do_lo_send_write(struct file *file,
/**
* do_lo_send_direct_write - helper for writing data to a loop device
*
- * This is the fast, non-transforming version for backing filesystems which do
- * not implement the address space operations write_begin and write_end.
- * It uses the write file operation which should be present on all writeable
- * filesystems.
+ * This is the fast, non-transforming version that does not need double
+ * buffering.
*/
static int do_lo_send_direct_write(struct loop_device *lo,
struct bio_vec *bvec, loff_t pos, struct page *page)
@@ -316,15 +246,9 @@ static int do_lo_send_direct_write(struct loop_device *lo,
/**
* do_lo_send_write - helper for writing data to a loop device
*
- * This is the slow, transforming version for filesystems which do not
- * implement the address space operations write_begin and write_end. It
- * uses the write file operation which should be present on all writeable
- * filesystems.
- *
- * Using fops->write is slower than using aops->{prepare,commit}_write in the
- * transforming case because we need to double buffer the data as we cannot do
- * the transformations in place as we do not have direct access to the
- * destination pages of the backing file.
+ * This is the slow, transforming version that needs to double buffer the
+ * data as it cannot do the transformations in place without having direct
+ * access to the destination pages of the backing file.
*/
static int do_lo_send_write(struct loop_device *lo, struct bio_vec *bvec,
loff_t pos, struct page *page)
@@ -350,17 +274,16 @@ static int lo_send(struct loop_device *lo, struct bio *bio, loff_t pos)
struct page *page = NULL;
int i, ret = 0;
- do_lo_send = do_lo_send_aops;
- if (!(lo->lo_flags & LO_FLAGS_USE_AOPS)) {
+ if (lo->transfer != transfer_none) {
+ page = alloc_page(GFP_NOIO | __GFP_HIGHMEM);
+ if (unlikely(!page))
+ goto fail;
+ kmap(page);
+ do_lo_send = do_lo_send_write;
+ } else {
do_lo_send = do_lo_send_direct_write;
- if (lo->transfer != transfer_none) {
- page = alloc_page(GFP_NOIO | __GFP_HIGHMEM);
- if (unlikely(!page))
- goto fail;
- kmap(page);
- do_lo_send = do_lo_send_write;
- }
}
+
bio_for_each_segment(bvec, bio, i) {
ret = do_lo_send(lo, bvec, pos, page);
if (ret < 0)
@@ -514,7 +437,7 @@ static struct bio *loop_get_bio(struct loop_device *lo)
return bio_list_pop(&lo->lo_bio_list);
}
-static int loop_make_request(struct request_queue *q, struct bio *old_bio)
+static void loop_make_request(struct request_queue *q, struct bio *old_bio)
{
struct loop_device *lo = q->queuedata;
int rw = bio_rw(old_bio);
@@ -532,12 +455,11 @@ static int loop_make_request(struct request_queue *q, struct bio *old_bio)
loop_add_bio(lo, old_bio);
wake_up(&lo->lo_event);
spin_unlock_irq(&lo->lo_lock);
- return 0;
+ return;
out:
spin_unlock_irq(&lo->lo_lock);
bio_io_error(old_bio);
- return 0;
}
struct switch_request {
@@ -849,35 +771,23 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
mapping = file->f_mapping;
inode = mapping->host;
- if (!(file->f_mode & FMODE_WRITE))
- lo_flags |= LO_FLAGS_READ_ONLY;
-
error = -EINVAL;
- if (S_ISREG(inode->i_mode) || S_ISBLK(inode->i_mode)) {
- const struct address_space_operations *aops = mapping->a_ops;
-
- if (aops->write_begin)
- lo_flags |= LO_FLAGS_USE_AOPS;
- if (!(lo_flags & LO_FLAGS_USE_AOPS) && !file->f_op->write)
- lo_flags |= LO_FLAGS_READ_ONLY;
+ if (!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))
+ goto out_putf;
- lo_blocksize = S_ISBLK(inode->i_mode) ?
- inode->i_bdev->bd_block_size : PAGE_SIZE;
+ if (!(file->f_mode & FMODE_WRITE) || !(mode & FMODE_WRITE) ||
+ !file->f_op->write)
+ lo_flags |= LO_FLAGS_READ_ONLY;
- error = 0;
- } else {
- goto out_putf;
- }
+ lo_blocksize = S_ISBLK(inode->i_mode) ?
+ inode->i_bdev->bd_block_size : PAGE_SIZE;
+ error = -EFBIG;
size = get_loop_size(lo, file);
-
- if ((loff_t)(sector_t)size != size) {
- error = -EFBIG;
+ if ((loff_t)(sector_t)size != size)
goto out_putf;
- }
- if (!(mode & FMODE_WRITE))
- lo_flags |= LO_FLAGS_READ_ONLY;
+ error = 0;
set_device_ro(bdev, (lo_flags & LO_FLAGS_READ_ONLY) != 0);
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index e133f09..a63b0a2 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2444,7 +2444,7 @@ static void pkt_end_io_read_cloned(struct bio *bio, int err)
pkt_bio_finished(pd);
}
-static int pkt_make_request(struct request_queue *q, struct bio *bio)
+static void pkt_make_request(struct request_queue *q, struct bio *bio)
{
struct pktcdvd_device *pd;
char b[BDEVNAME_SIZE];
@@ -2473,7 +2473,7 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
cloned_bio->bi_end_io = pkt_end_io_read_cloned;
pd->stats.secs_r += bio->bi_size >> 9;
pkt_queue_bio(pd, cloned_bio);
- return 0;
+ return;
}
if (!test_bit(PACKET_WRITABLE, &pd->flags)) {
@@ -2509,7 +2509,7 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
pkt_make_request(q, &bp->bio1);
pkt_make_request(q, &bp->bio2);
bio_pair_release(bp);
- return 0;
+ return;
}
}
@@ -2533,7 +2533,7 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
}
spin_unlock(&pkt->lock);
spin_unlock(&pd->cdrw.active_list_lock);
- return 0;
+ return;
} else {
blocked_bio = 1;
}
@@ -2584,10 +2584,9 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
*/
wake_up(&pd->wqueue);
}
- return 0;
+ return;
end_io:
bio_io_error(bio);
- return 0;
}
diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
index b3bdb8a..7fad7af 100644
--- a/drivers/block/ps3vram.c
+++ b/drivers/block/ps3vram.c
@@ -596,7 +596,7 @@ out:
return next;
}
-static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
+static void ps3vram_make_request(struct request_queue *q, struct bio *bio)
{
struct ps3_system_bus_device *dev = q->queuedata;
struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
@@ -610,13 +610,11 @@ static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
spin_unlock_irq(&priv->lock);
if (busy)
- return 0;
+ return;
do {
bio = ps3vram_do_bio(dev, bio);
} while (bio);
-
- return 0;
}
static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
diff --git a/drivers/block/umem.c b/drivers/block/umem.c
index 031ca72..aa27120 100644
--- a/drivers/block/umem.c
+++ b/drivers/block/umem.c
@@ -513,7 +513,7 @@ static void process_page(unsigned long data)
}
}
-static int mm_make_request(struct request_queue *q, struct bio *bio)
+static void mm_make_request(struct request_queue *q, struct bio *bio)
{
struct cardinfo *card = q->queuedata;
pr_debug("mm_make_request %llu %u\n",
@@ -525,7 +525,7 @@ static int mm_make_request(struct request_queue *q, struct bio *bio)
card->biotail = &bio->bi_next;
spin_unlock_irq(&card->lock);
- return 0;
+ return;
}
static irqreturn_t mm_interrupt(int irq, void *__card)
OpenPOWER on IntegriCloud