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block: add gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iov

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Currently, blk_rq_map_user and blk_rq_map_user_iov always do
GFP_KERNEL allocation.

This adds gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iov
so sg can use it (sg always does GFP_ATOMIC allocation).

Signed-off-by: FUJITA Tomonori <[email protected]>
Signed-off-by: Douglas Gilbert <[email protected]>
Cc: Mike Christie <[email protected]>
Cc: James Bottomley <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
FUJITA Tomonori 2008-08-28 16:17:05 +09:00 • committed by Jens Axboe
commit a3bce90edd
8 changed files with 47 additions and 34 deletions
Download patch file Download diff file Expand all files Collapse all files

20
block/blk-map.c
View file

@ -41,7 +41,8 @@ static int __blk_rq_unmap_user(struct bio *bio)
}
static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
void __user *ubuf, unsigned int len)
void __user *ubuf, unsigned int len,
gfp_t gfp_mask)
{
unsigned long uaddr;
unsigned int alignment;
@ -57,9 +58,9 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
uaddr = (unsigned long) ubuf;
alignment = queue_dma_alignment(q) | q->dma_pad_mask;
if (!(uaddr & alignment) && !(len & alignment))
bio = bio_map_user(q, NULL, uaddr, len, reading);
bio = bio_map_user(q, NULL, uaddr, len, reading, gfp_mask);
else
bio = bio_copy_user(q, uaddr, len, reading);
bio = bio_copy_user(q, uaddr, len, reading, gfp_mask);
if (IS_ERR(bio))
return PTR_ERR(bio);
@ -90,6 +91,7 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
* @rq: request structure to fill
* @ubuf: the user buffer
* @len: length of user data
* @gfp_mask: memory allocation flags
*
* Description:
* Data will be mapped directly for zero copy I/O, if possible. Otherwise
@ -105,7 +107,7 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
* unmapping.
*/
int blk_rq_map_user(struct request_queue *q, struct request *rq,
void __user *ubuf, unsigned long len)
void __user *ubuf, unsigned long len, gfp_t gfp_mask)
{
unsigned long bytes_read = 0;
struct bio *bio = NULL;
@ -132,7 +134,7 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq,
if (end - start > BIO_MAX_PAGES)
map_len -= PAGE_SIZE;
ret = __blk_rq_map_user(q, rq, ubuf, map_len);
ret = __blk_rq_map_user(q, rq, ubuf, map_len, gfp_mask);
if (ret < 0)
goto unmap_rq;
if (!bio)
@ -160,6 +162,7 @@ EXPORT_SYMBOL(blk_rq_map_user);
* @iov: pointer to the iovec
* @iov_count: number of elements in the iovec
* @len: I/O byte count
* @gfp_mask: memory allocation flags
*
* Description:
* Data will be mapped directly for zero copy I/O, if possible. Otherwise
@ -175,7 +178,8 @@ EXPORT_SYMBOL(blk_rq_map_user);
* unmapping.
*/
int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
struct sg_iovec *iov, int iov_count, unsigned int len)
struct sg_iovec *iov, int iov_count, unsigned int len,
gfp_t gfp_mask)
{
struct bio *bio;
int i, read = rq_data_dir(rq) == READ;
@ -194,9 +198,9 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
}
if (unaligned || (q->dma_pad_mask & len))
bio = bio_copy_user_iov(q, iov, iov_count, read);
bio = bio_copy_user_iov(q, iov, iov_count, read, gfp_mask);
else
bio = bio_map_user_iov(q, NULL, iov, iov_count, read);
bio = bio_map_user_iov(q, NULL, iov, iov_count, read, gfp_mask);
if (IS_ERR(bio))
return PTR_ERR(bio);

5
block/bsg.c
View file

@ -283,7 +283,8 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, int has_write_perm)
next_rq->cmd_type = rq->cmd_type;
dxferp = (void*)(unsigned long)hdr->din_xferp;
ret = blk_rq_map_user(q, next_rq, dxferp, hdr->din_xfer_len);
ret = blk_rq_map_user(q, next_rq, dxferp, hdr->din_xfer_len,
GFP_KERNEL);
if (ret)
goto out;
}
@ -298,7 +299,7 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, int has_write_perm)
dxfer_len = 0;
if (dxfer_len) {
ret = blk_rq_map_user(q, rq, dxferp, dxfer_len);
ret = blk_rq_map_user(q, rq, dxferp, dxfer_len, GFP_KERNEL);
if (ret)
goto out;
}

5
block/scsi_ioctl.c
View file

@ -315,10 +315,11 @@ static int sg_io(struct file *file, struct request_queue *q,
}
ret = blk_rq_map_user_iov(q, rq, iov, hdr->iovec_count,
hdr->dxfer_len);
hdr->dxfer_len, GFP_KERNEL);
kfree(iov);
} else if (hdr->dxfer_len)
ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len);
ret = blk_rq_map_user(q, rq, hdr->dxferp, hdr->dxfer_len,
GFP_KERNEL);
if (ret)
goto out;