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Date: Tue, 17 Jul 2012 03:48:27 -0700 (PDT)
From: "Yaniv Gardi" <ygardi@...eaurora.org>
To: merez@...eaurora.org
Cc: "Yaniv Gardi" <ygardi@...eaurora.org>, linux-mmc@...r.kernel.org,
merez@...eaurora.org, linux-arm-msm@...r.kernel.org,
"open list" <linux-kernel@...r.kernel.org>,
"Jens Axboe" <axboe@...nel.d>
Subject: Re: [PATCH RESEND v7 1/2] block: ioctl support for sanitize in
eMMC 4.5
Hi Jens,
Can you approve this patch?
Thanks,
Yaniv
> Looks good to me.
> Reviewed-by: Maya Erez <merez@...eaurora.org>
>
> On Thu, June 28, 2012 1:32 am, Yaniv Gardi wrote:
>> Adding a new ioctl to support sanitize operation in eMMC
>> cards version 4.5.
>> The sanitize ioctl support helps performing this operation
>> via user application.
>>
>> Signed-off-by: Yaniv Gardi <ygardi@...eaurora.org>
>>
>> ---
>> block/blk-core.c | 15 ++++++++++--
>> block/blk-lib.c | 51
>> +++++++++++++++++++++++++++++++++++++++++++++
>> block/blk-merge.c | 4 +++
>> block/elevator.c | 2 +-
>> block/ioctl.c | 9 ++++++++
>> include/linux/blk_types.h | 5 +++-
>> include/linux/blkdev.h | 3 ++
>> include/linux/fs.h | 1 +
>> kernel/trace/blktrace.c | 2 +
>> 9 files changed, 87 insertions(+), 5 deletions(-)
>>
>> diff --git a/block/blk-core.c b/block/blk-core.c
>> index 3c923a7..4a56102b 100644
>> --- a/block/blk-core.c
>> +++ b/block/blk-core.c
>> @@ -1641,7 +1641,7 @@ generic_make_request_checks(struct bio *bio)
>> goto end_io;
>> }
>>
>> - if (unlikely(!(bio->bi_rw & REQ_DISCARD) &&
>> + if (unlikely(!(bio->bi_rw & (REQ_DISCARD | REQ_SANITIZE)) &&
>> nr_sectors > queue_max_hw_sectors(q))) {
>> printk(KERN_ERR "bio too big device %s (%u > %u)\n",
>> bdevname(bio->bi_bdev, b),
>> @@ -1689,6 +1689,14 @@ generic_make_request_checks(struct bio *bio)
>> goto end_io;
>> }
>>
>> + if ((bio->bi_rw & REQ_SANITIZE) &&
>> + (!blk_queue_sanitize(q))) {
>> + pr_info("%s - got a SANITIZE request but the queue "
>> + "doesn't support sanitize requests", __func__);
>> + err = -EOPNOTSUPP;
>> + goto end_io;
>> + }
>> +
>> if (blk_throtl_bio(q, bio))
>> return false; /* throttled, will be resubmitted later */
>>
>> @@ -1794,7 +1802,8 @@ void submit_bio(int rw, struct bio *bio)
>> * If it's a regular read/write or a barrier with data attached,
>> * go through the normal accounting stuff before submission.
>> */
>> - if (bio_has_data(bio) && !(rw & REQ_DISCARD)) {
>> + if (bio_has_data(bio) &&
>> + (!(rw & (REQ_DISCARD | REQ_SANITIZE)))) {
>> if (rw & WRITE) {
>> count_vm_events(PGPGOUT, count);
>> } else {
>> @@ -1840,7 +1849,7 @@ EXPORT_SYMBOL(submit_bio);
>> */
>> int blk_rq_check_limits(struct request_queue *q, struct request *rq)
>> {
>> - if (rq->cmd_flags & REQ_DISCARD)
>> + if (rq->cmd_flags & (REQ_DISCARD | REQ_SANITIZE))
>> return 0;
>>
>> if (blk_rq_sectors(rq) > queue_max_sectors(q) ||
>> diff --git a/block/blk-lib.c b/block/blk-lib.c
>> index 2b461b4..280d63e 100644
>> --- a/block/blk-lib.c
>> +++ b/block/blk-lib.c
>> @@ -115,6 +115,57 @@ int blkdev_issue_discard(struct block_device *bdev,
>> sector_t sector,
>> EXPORT_SYMBOL(blkdev_issue_discard);
>>
>> /**
>> + * blkdev_issue_sanitize - queue a sanitize request
>> + * @bdev: blockdev to issue sanitize for
>> + * @gfp_mask: memory allocation flags (for bio_alloc)
>> + *
>> + * Description:
>> + * Issue a sanitize request for the specified block device
>> + */
>> +int blkdev_issue_sanitize(struct block_device *bdev, gfp_t gfp_mask)
>> +{
>> + DECLARE_COMPLETION_ONSTACK(wait);
>> + struct request_queue *q = bdev_get_queue(bdev);
>> + int type = REQ_WRITE | REQ_SANITIZE;
>> + struct bio_batch bb;
>> + struct bio *bio;
>> + int ret = 0;
>> +
>> + if (!q)
>> + return -ENXIO;
>> +
>> + if (!blk_queue_sanitize(q)) {
>> + pr_err("%s - card doesn't support sanitize", __func__);
>> + return -EOPNOTSUPP;
>> + }
>> +
>> + bio = bio_alloc(gfp_mask, 1);
>> + if (!bio)
>> + return -ENOMEM;
>> +
>> + atomic_set(&bb.done, 1);
>> + bb.flags = 1 << BIO_UPTODATE;
>> + bb.wait = &wait;
>> +
>> + bio->bi_end_io = bio_batch_end_io;
>> + bio->bi_bdev = bdev;
>> + bio->bi_private = &bb;
>> +
>> + atomic_inc(&bb.done);
>> + submit_bio(type, bio);
>> +
>> + /* Wait for bios in-flight */
>> + if (!atomic_dec_and_test(&bb.done))
>> + wait_for_completion(&wait);
>> +
>> + if (!test_bit(BIO_UPTODATE, &bb.flags))
>> + ret = -EIO;
>> +
>> + return ret;
>> +}
>> +EXPORT_SYMBOL(blkdev_issue_sanitize);
>> +
>> +/**
>> * blkdev_issue_zeroout - generate number of zero filed write bios
>> * @bdev: blockdev to issue
>> * @sector: start sector
>> diff --git a/block/blk-merge.c b/block/blk-merge.c
>> index 160035f..7e24772 100644
>> --- a/block/blk-merge.c
>> +++ b/block/blk-merge.c
>> @@ -477,6 +477,10 @@ bool blk_rq_merge_ok(struct request *rq, struct bio
>> *bio)
>> if (!rq_mergeable(rq))
>> return false;
>>
>> + /* don't merge file system requests and sanitize requests */
>> + if ((req->cmd_flags & REQ_SANITIZE) != (next->cmd_flags &
>> REQ_SANITIZE))
>> + return false;
>> +
>> /* don't merge file system requests and discard requests */
>> if ((bio->bi_rw & REQ_DISCARD) != (rq->bio->bi_rw & REQ_DISCARD))
>> return false;
>> diff --git a/block/elevator.c b/block/elevator.c
>> index 6a55d41..91f1de1 100644
>> --- a/block/elevator.c
>> +++ b/block/elevator.c
>> @@ -563,7 +563,7 @@ void __elv_add_request(struct request_queue *q,
>> struct
>> request *rq, int where)
>> if (rq->cmd_flags & REQ_SOFTBARRIER) {
>> /* barriers are scheduling boundary, update end_sector */
>> if (rq->cmd_type == REQ_TYPE_FS ||
>> - (rq->cmd_flags & REQ_DISCARD)) {
>> + (rq->cmd_flags & (REQ_DISCARD | REQ_SANITIZE))) {
>> q->end_sector = rq_end_sector(rq);
>> q->boundary_rq = rq;
>> }
>> diff --git a/block/ioctl.c b/block/ioctl.c
>> index ba15b2d..dd76ba0 100644
>> --- a/block/ioctl.c
>> +++ b/block/ioctl.c
>> @@ -132,6 +132,11 @@ static int blk_ioctl_discard(struct block_device
>> *bdev, uint64_t start,
>> return blkdev_issue_discard(bdev, start, len, GFP_KERNEL, flags);
>> }
>>
>> +static int blk_ioctl_sanitize(struct block_device *bdev)
>> +{
>> + return blkdev_issue_sanitize(bdev, GFP_KERNEL);
>> +}
>> +
>> static int put_ushort(unsigned long arg, unsigned short val)
>> {
>> return put_user(val, (unsigned short __user *)arg);
>> @@ -234,6 +239,10 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t
>> mode, unsigned cmd,
>> set_device_ro(bdev, n);
>> return 0;
>>
>> + case BLKSANITIZE:
>> + ret = blk_ioctl_sanitize(bdev);
>> + break;
>> +
>> case BLKDISCARD:
>> case BLKSECDISCARD: {
>> uint64_t range[2];
>> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
>> index 0edb65d..e58e0db 100644
>> --- a/include/linux/blk_types.h
>> +++ b/include/linux/blk_types.h
>> @@ -160,6 +160,7 @@ enum rq_flag_bits {
>> __REQ_FLUSH_SEQ, /* request for flush sequence */
>> __REQ_IO_STAT, /* account I/O stat */
>> __REQ_MIXED_MERGE, /* merge of different types, fail separately */
>> + __REQ_SANITIZE, /* sanitize */
>> __REQ_NR_BITS, /* stops here */
>> };
>>
>> @@ -171,13 +172,15 @@ enum rq_flag_bits {
>> #define REQ_META (1 << __REQ_META)
>> #define REQ_PRIO (1 << __REQ_PRIO)
>> #define REQ_DISCARD (1 << __REQ_DISCARD)
>> +#define REQ_SANITIZE (1 << __REQ_SANITIZE)
>> #define REQ_NOIDLE (1 << __REQ_NOIDLE)
>>
>> #define REQ_FAILFAST_MASK \
>> (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)
>> #define REQ_COMMON_MASK \
>> (REQ_WRITE | REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | \
>> - REQ_DISCARD | REQ_NOIDLE | REQ_FLUSH | REQ_FUA | REQ_SECURE)
>> + REQ_DISCARD | REQ_NOIDLE | REQ_FLUSH | REQ_FUA | REQ_SECURE | \
>> + REQ_SANITIZE)
>> #define REQ_CLONE_MASK REQ_COMMON_MASK
>>
>> #define REQ_RAHEAD (1 << __REQ_RAHEAD)
>> diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
>> index ba43f40..1db6c91 100644
>> --- a/include/linux/blkdev.h
>> +++ b/include/linux/blkdev.h
>> @@ -438,6 +438,7 @@ struct request_queue {
>> #define QUEUE_FLAG_ADD_RANDOM 16 /* Contributes to random pool */
>> #define QUEUE_FLAG_SECDISCARD 17 /* supports SECDISCARD */
>> #define QUEUE_FLAG_SAME_FORCE 18 /* force complete on same CPU */
>> +#define QUEUE_FLAG_SANITIZE 19 /* supports SANITIZE */
>>
>> #define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
>> (1 << QUEUE_FLAG_STACKABLE) | \
>> @@ -518,6 +519,7 @@ static inline void queue_flag_clear(unsigned int
>> flag,
>> struct request_queue *q)
>> #define blk_queue_stackable(q) \
>> test_bit(QUEUE_FLAG_STACKABLE, &(q)->queue_flags)
>> #define blk_queue_discard(q) test_bit(QUEUE_FLAG_DISCARD,
>> &(q)->queue_flags)
>> +#define blk_queue_sanitize(q) test_bit(QUEUE_FLAG_SANITIZE,
>> &(q)->queue_flags)
>> #define blk_queue_secdiscard(q) (blk_queue_discard(q) && \
>> test_bit(QUEUE_FLAG_SECDISCARD, &(q)->queue_flags))
>>
>> @@ -971,6 +973,7 @@ static inline struct request
>> *blk_map_queue_find_tag(struct blk_queue_tag *bqt,
>> extern int blkdev_issue_flush(struct block_device *, gfp_t, sector_t
>> *);
>> extern int blkdev_issue_discard(struct block_device *bdev, sector_t
>> sector,
>> sector_t nr_sects, gfp_t gfp_mask, unsigned long flags);
>> +extern int blkdev_issue_sanitize(struct block_device *bdev, gfp_t
>> gfp_mask);
>> extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t
>> sector,
>> sector_t nr_sects, gfp_t gfp_mask);
>> static inline int sb_issue_discard(struct super_block *sb, sector_t
>> block,
>> diff --git a/include/linux/fs.h b/include/linux/fs.h
>> index b0a6d44..167c450 100644
>> --- a/include/linux/fs.h
>> +++ b/include/linux/fs.h
>> @@ -333,6 +333,7 @@ struct inodes_stat_t {
>> #define BLKDISCARDZEROES _IO(0x12,124)
>> #define BLKSECDISCARD _IO(0x12,125)
>> #define BLKROTATIONAL _IO(0x12,126)
>> +#define BLKSANITIZE _IO(0x12, 127)
>>
>> #define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
>> #define FIBMAP _IO(0x00,1) /* bmap access */
>> diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
>> index c0bd030..06f7940 100644
>> --- a/kernel/trace/blktrace.c
>> +++ b/kernel/trace/blktrace.c
>> @@ -1788,6 +1788,8 @@ void blk_fill_rwbs(char *rwbs, u32 rw, int bytes)
>> rwbs[i++] = 'W';
>> else if (rw & REQ_DISCARD)
>> rwbs[i++] = 'D';
>> + else if (rw & REQ_SANITIZE)
>> + rwbs[i++] = 'Z';
>> else if (bytes)
>> rwbs[i++] = 'R';
>> else
>> --
>> 1.7.6
>> --
>> Sent by a consultant of the Qualcomm Innovation Center, Inc.
>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora
>> Forum
>>
>
>
> --
> Sent by consultant of Qualcomm Innovation Center, Inc.
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum
>
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>
--
Yaniv Gardi
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum
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