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authorLinus Torvalds <torvalds@linux-foundation.org>2014-10-18 18:53:51 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-18 18:53:51 (GMT)
commitd3dc366bbaf07c125561e90d6da4bb147741101a (patch)
tree6eb7e79a8ec9df1fa705393c6d15ccea3d104661 /include
parent511c41d9e6665a07aca94eb00983cf6d77dd87ff (diff)
parente19a8a0ad2d255316830ead05b59c5a704434cbb (diff)
Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-block
Pull core block layer changes from Jens Axboe: "This is the core block IO pull request for 3.18. Apart from the new and improved flush machinery for blk-mq, this is all mostly bug fixes and cleanups. - blk-mq timeout updates and fixes from Christoph. - Removal of REQ_END, also from Christoph. We pass it through the ->queue_rq() hook for blk-mq instead, freeing up one of the request bits. The space was overly tight on 32-bit, so Martin also killed REQ_KERNEL since it's no longer used. - blk integrity updates and fixes from Martin and Gu Zheng. - Update to the flush machinery for blk-mq from Ming Lei. Now we have a per hardware context flush request, which both cleans up the code should scale better for flush intensive workloads on blk-mq. - Improve the error printing, from Rob Elliott. - Backing device improvements and cleanups from Tejun. - Fixup of a misplaced rq_complete() tracepoint from Hannes. - Make blk_get_request() return error pointers, fixing up issues where we NULL deref when a device goes bad or missing. From Joe Lawrence. - Prep work for drastically reducing the memory consumption of dm devices from Junichi Nomura. This allows creating clone bio sets without preallocating a lot of memory. - Fix a blk-mq hang on certain combinations of queue depths and hardware queues from me. - Limit memory consumption for blk-mq devices for crash dump scenarios and drivers that use crazy high depths (certain SCSI shared tag setups). We now just use a single queue and limited depth for that" * 'for-3.18/core' of git://git.kernel.dk/linux-block: (58 commits) block: Remove REQ_KERNEL blk-mq: allocate cpumask on the home node bio-integrity: remove the needless fail handle of bip_slab creating block: include func name in __get_request prints block: make blk_update_request print prefix match ratelimited prefix blk-merge: don't compute bi_phys_segments from bi_vcnt for cloned bio block: fix alignment_offset math that assumes io_min is a power-of-2 blk-mq: Make bt_clear_tag() easier to read blk-mq: fix potential hang if rolling wakeup depth is too high block: add bioset_create_nobvec() block: use bio_clone_fast() in blk_rq_prep_clone() block: misplaced rq_complete tracepoint sd: Honor block layer integrity handling flags block: Replace strnicmp with strncasecmp block: Add T10 Protection Information functions block: Don't merge requests if integrity flags differ block: Integrity checksum flag block: Relocate bio integrity flags block: Add a disk flag to block integrity profile block: Add prefix to block integrity profile flags ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/backing-dev.h4
-rw-r--r--include/linux/bio.h65
-rw-r--r--include/linux/blk-mq.h22
-rw-r--r--include/linux/blk_types.h18
-rw-r--r--include/linux/blkdev.h71
-rw-r--r--include/linux/crc-t10dif.h5
-rw-r--r--include/linux/fs.h2
-rw-r--r--include/linux/nfs_fs.h4
-rw-r--r--include/linux/t10-pi.h22
-rw-r--r--include/scsi/scsi_cmnd.h36
10 files changed, 159 insertions, 90 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index e488e94..5da6012 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -28,12 +28,10 @@ struct dentry;
* Bits in backing_dev_info.state
*/
enum bdi_state {
- BDI_wb_alloc, /* Default embedded wb allocated */
BDI_async_congested, /* The async (write) queue is getting full */
BDI_sync_congested, /* The sync queue is getting full */
BDI_registered, /* bdi_register() was done */
BDI_writeback_running, /* Writeback is in progress */
- BDI_unused, /* Available bits start here */
};
typedef int (congested_fn)(void *, int);
@@ -50,7 +48,6 @@ enum bdi_stat_item {
struct bdi_writeback {
struct backing_dev_info *bdi; /* our parent bdi */
- unsigned int nr;
unsigned long last_old_flush; /* last old data flush */
@@ -124,7 +121,6 @@ void bdi_start_background_writeback(struct backing_dev_info *bdi);
void bdi_writeback_workfn(struct work_struct *work);
int bdi_has_dirty_io(struct backing_dev_info *bdi);
void bdi_wakeup_thread_delayed(struct backing_dev_info *bdi);
-void bdi_lock_two(struct bdi_writeback *wb1, struct bdi_writeback *wb2);
extern spinlock_t bdi_lock;
extern struct list_head bdi_list;
diff --git a/include/linux/bio.h b/include/linux/bio.h
index b39e500..7347f48 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -292,7 +292,24 @@ static inline unsigned bio_segments(struct bio *bio)
*/
#define bio_get(bio) atomic_inc(&(bio)->bi_cnt)
+enum bip_flags {
+ BIP_BLOCK_INTEGRITY = 1 << 0, /* block layer owns integrity data */
+ BIP_MAPPED_INTEGRITY = 1 << 1, /* ref tag has been remapped */
+ BIP_CTRL_NOCHECK = 1 << 2, /* disable HBA integrity checking */
+ BIP_DISK_NOCHECK = 1 << 3, /* disable disk integrity checking */
+ BIP_IP_CHECKSUM = 1 << 4, /* IP checksum */
+};
+
#if defined(CONFIG_BLK_DEV_INTEGRITY)
+
+static inline struct bio_integrity_payload *bio_integrity(struct bio *bio)
+{
+ if (bio->bi_rw & REQ_INTEGRITY)
+ return bio->bi_integrity;
+
+ return NULL;
+}
+
/*
* bio integrity payload
*/
@@ -301,21 +318,40 @@ struct bio_integrity_payload {
struct bvec_iter bip_iter;
- /* kill - should just use bip_vec */
- void *bip_buf; /* generated integrity data */
-
bio_end_io_t *bip_end_io; /* saved I/O completion fn */
unsigned short bip_slab; /* slab the bip came from */
unsigned short bip_vcnt; /* # of integrity bio_vecs */
unsigned short bip_max_vcnt; /* integrity bio_vec slots */
- unsigned bip_owns_buf:1; /* should free bip_buf */
+ unsigned short bip_flags; /* control flags */
struct work_struct bip_work; /* I/O completion */
struct bio_vec *bip_vec;
struct bio_vec bip_inline_vecs[0];/* embedded bvec array */
};
+
+static inline bool bio_integrity_flagged(struct bio *bio, enum bip_flags flag)
+{
+ struct bio_integrity_payload *bip = bio_integrity(bio);
+
+ if (bip)
+ return bip->bip_flags & flag;
+
+ return false;
+}
+
+static inline sector_t bip_get_seed(struct bio_integrity_payload *bip)
+{
+ return bip->bip_iter.bi_sector;
+}
+
+static inline void bip_set_seed(struct bio_integrity_payload *bip,
+ sector_t seed)
+{
+ bip->bip_iter.bi_sector = seed;
+}
+
#endif /* CONFIG_BLK_DEV_INTEGRITY */
extern void bio_trim(struct bio *bio, int offset, int size);
@@ -342,6 +378,7 @@ static inline struct bio *bio_next_split(struct bio *bio, int sectors,
}
extern struct bio_set *bioset_create(unsigned int, unsigned int);
+extern struct bio_set *bioset_create_nobvec(unsigned int, unsigned int);
extern void bioset_free(struct bio_set *);
extern mempool_t *biovec_create_pool(int pool_entries);
@@ -353,7 +390,6 @@ extern struct bio *bio_clone_fast(struct bio *, gfp_t, struct bio_set *);
extern struct bio *bio_clone_bioset(struct bio *, gfp_t, struct bio_set *bs);
extern struct bio_set *fs_bio_set;
-unsigned int bio_integrity_tag_size(struct bio *bio);
static inline struct bio *bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs)
{
@@ -661,14 +697,10 @@ struct biovec_slab {
for_each_bio(_bio) \
bip_for_each_vec(_bvl, _bio->bi_integrity, _iter)
-#define bio_integrity(bio) (bio->bi_integrity != NULL)
-
extern struct bio_integrity_payload *bio_integrity_alloc(struct bio *, gfp_t, unsigned int);
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);
-extern int bio_integrity_get_tag(struct bio *, void *, unsigned int);
+extern bool bio_integrity_enabled(struct bio *bio);
extern int bio_integrity_prep(struct bio *);
extern void bio_integrity_endio(struct bio *, int);
extern void bio_integrity_advance(struct bio *, unsigned int);
@@ -680,14 +712,14 @@ extern void bio_integrity_init(void);
#else /* CONFIG_BLK_DEV_INTEGRITY */
-static inline int bio_integrity(struct bio *bio)
+static inline void *bio_integrity(struct bio *bio)
{
- return 0;
+ return NULL;
}
-static inline int bio_integrity_enabled(struct bio *bio)
+static inline bool bio_integrity_enabled(struct bio *bio)
{
- return 0;
+ return false;
}
static inline int bioset_integrity_create(struct bio_set *bs, int pool_size)
@@ -733,6 +765,11 @@ static inline void bio_integrity_init(void)
return;
}
+static inline bool bio_integrity_flagged(struct bio *bio, enum bip_flags flag)
+{
+ return false;
+}
+
#endif /* CONFIG_BLK_DEV_INTEGRITY */
#endif /* CONFIG_BLOCK */
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index c13a0c0..c9be158 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -4,6 +4,7 @@
#include <linux/blkdev.h>
struct blk_mq_tags;
+struct blk_flush_queue;
struct blk_mq_cpu_notifier {
struct list_head list;
@@ -34,6 +35,7 @@ struct blk_mq_hw_ctx {
struct request_queue *queue;
unsigned int queue_num;
+ struct blk_flush_queue *fq;
void *driver_data;
@@ -77,8 +79,9 @@ struct blk_mq_tag_set {
struct list_head tag_list;
};
-typedef int (queue_rq_fn)(struct blk_mq_hw_ctx *, struct request *);
+typedef int (queue_rq_fn)(struct blk_mq_hw_ctx *, struct request *, bool);
typedef struct blk_mq_hw_ctx *(map_queue_fn)(struct request_queue *, const int);
+typedef enum blk_eh_timer_return (timeout_fn)(struct request *, bool);
typedef int (init_hctx_fn)(struct blk_mq_hw_ctx *, void *, unsigned int);
typedef void (exit_hctx_fn)(struct blk_mq_hw_ctx *, unsigned int);
typedef int (init_request_fn)(void *, struct request *, unsigned int,
@@ -86,6 +89,9 @@ typedef int (init_request_fn)(void *, struct request *, unsigned int,
typedef void (exit_request_fn)(void *, struct request *, unsigned int,
unsigned int);
+typedef void (busy_iter_fn)(struct blk_mq_hw_ctx *, struct request *, void *,
+ bool);
+
struct blk_mq_ops {
/*
* Queue request
@@ -100,7 +106,7 @@ struct blk_mq_ops {
/*
* Called on request timeout
*/
- rq_timed_out_fn *timeout;
+ timeout_fn *timeout;
softirq_done_fn *complete;
@@ -115,6 +121,10 @@ struct blk_mq_ops {
/*
* Called for every command allocated by the block layer to allow
* the driver to set up driver specific data.
+ *
+ * Tag greater than or equal to queue_depth is for setting up
+ * flush request.
+ *
* Ditto for exit/teardown.
*/
init_request_fn *init_request;
@@ -160,8 +170,9 @@ struct request *blk_mq_tag_to_rq(struct blk_mq_tags *tags, unsigned int tag);
struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_index);
struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_tag_set *, unsigned int, int);
-void blk_mq_end_io(struct request *rq, int error);
-void __blk_mq_end_io(struct request *rq, int error);
+void blk_mq_start_request(struct request *rq);
+void blk_mq_end_request(struct request *rq, int error);
+void __blk_mq_end_request(struct request *rq, int error);
void blk_mq_requeue_request(struct request *rq);
void blk_mq_add_to_requeue_list(struct request *rq, bool at_head);
@@ -174,7 +185,8 @@ void blk_mq_stop_hw_queues(struct request_queue *q);
void blk_mq_start_hw_queues(struct request_queue *q);
void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async);
void blk_mq_delay_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs);
-void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data);
+void blk_mq_tag_busy_iter(struct blk_mq_hw_ctx *hctx, busy_iter_fn *fn,
+ void *priv);
/*
* Driver command data is immediately after the request. So subtract request
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 66c2167..445d592 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -78,9 +78,11 @@ struct bio {
struct io_context *bi_ioc;
struct cgroup_subsys_state *bi_css;
#endif
+ union {
#if defined(CONFIG_BLK_DEV_INTEGRITY)
- struct bio_integrity_payload *bi_integrity; /* data integrity */
+ struct bio_integrity_payload *bi_integrity; /* data integrity */
#endif
+ };
unsigned short bi_vcnt; /* how many bio_vec's */
@@ -118,10 +120,8 @@ struct bio {
#define BIO_USER_MAPPED 6 /* contains user pages */
#define BIO_EOPNOTSUPP 7 /* not supported */
#define BIO_NULL_MAPPED 8 /* contains invalid user pages */
-#define BIO_FS_INTEGRITY 9 /* fs owns integrity data, not block layer */
-#define BIO_QUIET 10 /* Make BIO Quiet */
-#define BIO_MAPPED_INTEGRITY 11/* integrity metadata has been remapped */
-#define BIO_SNAP_STABLE 12 /* bio data must be snapshotted during write */
+#define BIO_QUIET 9 /* Make BIO Quiet */
+#define BIO_SNAP_STABLE 10 /* bio data must be snapshotted during write */
/*
* Flags starting here get preserved by bio_reset() - this includes
@@ -162,6 +162,7 @@ enum rq_flag_bits {
__REQ_WRITE_SAME, /* write same block many times */
__REQ_NOIDLE, /* don't anticipate more IO after this one */
+ __REQ_INTEGRITY, /* I/O includes block integrity payload */
__REQ_FUA, /* forced unit access */
__REQ_FLUSH, /* request for cache flush */
@@ -186,9 +187,7 @@ 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_KERNEL, /* direct IO to kernel pages */
__REQ_PM, /* runtime pm request */
- __REQ_END, /* last of chain of requests */
__REQ_HASHED, /* on IO scheduler merge hash */
__REQ_MQ_INFLIGHT, /* track inflight for MQ */
__REQ_NR_BITS, /* stops here */
@@ -204,13 +203,14 @@ enum rq_flag_bits {
#define REQ_DISCARD (1ULL << __REQ_DISCARD)
#define REQ_WRITE_SAME (1ULL << __REQ_WRITE_SAME)
#define REQ_NOIDLE (1ULL << __REQ_NOIDLE)
+#define REQ_INTEGRITY (1ULL << __REQ_INTEGRITY)
#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_WRITE_SAME | REQ_NOIDLE | REQ_FLUSH | REQ_FUA | \
- REQ_SECURE)
+ REQ_SECURE | REQ_INTEGRITY)
#define REQ_CLONE_MASK REQ_COMMON_MASK
#define BIO_NO_ADVANCE_ITER_MASK (REQ_DISCARD|REQ_WRITE_SAME)
@@ -240,9 +240,7 @@ enum rq_flag_bits {
#define REQ_IO_STAT (1ULL << __REQ_IO_STAT)
#define REQ_MIXED_MERGE (1ULL << __REQ_MIXED_MERGE)
#define REQ_SECURE (1ULL << __REQ_SECURE)
-#define REQ_KERNEL (1ULL << __REQ_KERNEL)
#define REQ_PM (1ULL << __REQ_PM)
-#define REQ_END (1ULL << __REQ_END)
#define REQ_HASHED (1ULL << __REQ_HASHED)
#define REQ_MQ_INFLIGHT (1ULL << __REQ_MQ_INFLIGHT)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 87be398..0207a78 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -36,6 +36,7 @@ struct request;
struct sg_io_hdr;
struct bsg_job;
struct blkcg_gq;
+struct blk_flush_queue;
#define BLKDEV_MIN_RQ 4
#define BLKDEV_MAX_RQ 128 /* Default maximum */
@@ -455,14 +456,7 @@ struct request_queue {
*/
unsigned int flush_flags;
unsigned int flush_not_queueable:1;
- unsigned int flush_queue_delayed:1;
- unsigned int flush_pending_idx:1;
- unsigned int flush_running_idx:1;
- unsigned long flush_pending_since;
- struct list_head flush_queue[2];
- struct list_head flush_data_in_flight;
- struct request *flush_rq;
- spinlock_t mq_flush_lock;
+ struct blk_flush_queue *fq;
struct list_head requeue_list;
spinlock_t requeue_lock;
@@ -865,7 +859,7 @@ extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
{
- return bdev->bd_disk->queue;
+ return bdev->bd_disk->queue; /* this is never NULL */
}
/*
@@ -1285,10 +1279,9 @@ static inline int queue_alignment_offset(struct request_queue *q)
static inline int queue_limit_alignment_offset(struct queue_limits *lim, sector_t sector)
{
unsigned int granularity = max(lim->physical_block_size, lim->io_min);
- unsigned int alignment = (sector << 9) & (granularity - 1);
+ unsigned int alignment = sector_div(sector, granularity >> 9) << 9;
- return (granularity + lim->alignment_offset - alignment)
- & (granularity - 1);
+ return (granularity + lim->alignment_offset - alignment) % granularity;
}
static inline int bdev_alignment_offset(struct block_device *bdev)
@@ -1464,32 +1457,31 @@ static inline uint64_t rq_io_start_time_ns(struct request *req)
#if defined(CONFIG_BLK_DEV_INTEGRITY)
-#define INTEGRITY_FLAG_READ 2 /* verify data integrity on read */
-#define INTEGRITY_FLAG_WRITE 4 /* generate data integrity on write */
+enum blk_integrity_flags {
+ BLK_INTEGRITY_VERIFY = 1 << 0,
+ BLK_INTEGRITY_GENERATE = 1 << 1,
+ BLK_INTEGRITY_DEVICE_CAPABLE = 1 << 2,
+ BLK_INTEGRITY_IP_CHECKSUM = 1 << 3,
+};
-struct blk_integrity_exchg {
+struct blk_integrity_iter {
void *prot_buf;
void *data_buf;
- sector_t sector;
+ sector_t seed;
unsigned int data_size;
- unsigned short sector_size;
+ unsigned short interval;
const char *disk_name;
};
-typedef void (integrity_gen_fn) (struct blk_integrity_exchg *);
-typedef int (integrity_vrfy_fn) (struct blk_integrity_exchg *);
-typedef void (integrity_set_tag_fn) (void *, void *, unsigned int);
-typedef void (integrity_get_tag_fn) (void *, void *, unsigned int);
+typedef int (integrity_processing_fn) (struct blk_integrity_iter *);
struct blk_integrity {
- integrity_gen_fn *generate_fn;
- integrity_vrfy_fn *verify_fn;
- integrity_set_tag_fn *set_tag_fn;
- integrity_get_tag_fn *get_tag_fn;
+ integrity_processing_fn *generate_fn;
+ integrity_processing_fn *verify_fn;
unsigned short flags;
unsigned short tuple_size;
- unsigned short sector_size;
+ unsigned short interval;
unsigned short tag_size;
const char *name;
@@ -1504,10 +1496,10 @@ extern int blk_integrity_compare(struct gendisk *, struct gendisk *);
extern int blk_rq_map_integrity_sg(struct request_queue *, struct bio *,
struct scatterlist *);
extern int blk_rq_count_integrity_sg(struct request_queue *, struct bio *);
-extern int blk_integrity_merge_rq(struct request_queue *, struct request *,
- struct request *);
-extern int blk_integrity_merge_bio(struct request_queue *, struct request *,
- struct bio *);
+extern bool blk_integrity_merge_rq(struct request_queue *, struct request *,
+ struct request *);
+extern bool blk_integrity_merge_bio(struct request_queue *, struct request *,
+ struct bio *);
static inline
struct blk_integrity *bdev_get_integrity(struct block_device *bdev)
@@ -1520,12 +1512,9 @@ static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
return disk->integrity;
}
-static inline int blk_integrity_rq(struct request *rq)
+static inline bool blk_integrity_rq(struct request *rq)
{
- if (rq->bio == NULL)
- return 0;
-
- return bio_integrity(rq->bio);
+ return rq->cmd_flags & REQ_INTEGRITY;
}
static inline void blk_queue_max_integrity_segments(struct request_queue *q,
@@ -1590,15 +1579,15 @@ static inline unsigned short queue_max_integrity_segments(struct request_queue *
{
return 0;
}
-static inline int blk_integrity_merge_rq(struct request_queue *rq,
- struct request *r1,
- struct request *r2)
+static inline bool blk_integrity_merge_rq(struct request_queue *rq,
+ struct request *r1,
+ struct request *r2)
{
return 0;
}
-static inline int blk_integrity_merge_bio(struct request_queue *rq,
- struct request *r,
- struct bio *b)
+static inline bool blk_integrity_merge_bio(struct request_queue *rq,
+ struct request *r,
+ struct bio *b)
{
return 0;
}
diff --git a/include/linux/crc-t10dif.h b/include/linux/crc-t10dif.h
index b3cb71f..cf53d07 100644
--- a/include/linux/crc-t10dif.h
+++ b/include/linux/crc-t10dif.h
@@ -6,7 +6,8 @@
#define CRC_T10DIF_DIGEST_SIZE 2
#define CRC_T10DIF_BLOCK_SIZE 1
-__u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len);
-__u16 crc_t10dif(unsigned char const *, size_t);
+extern __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer,
+ size_t len);
+extern __u16 crc_t10dif(unsigned char const *, size_t);
#endif
diff --git a/include/linux/fs.h b/include/linux/fs.h
index ab4f1a1..a957d43 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -192,8 +192,6 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
#define READ 0
#define WRITE RW_MASK
#define READA RWA_MASK
-#define KERNEL_READ (READ|REQ_KERNEL)
-#define KERNEL_WRITE (WRITE|REQ_KERNEL)
#define READ_SYNC (READ | REQ_SYNC)
#define WRITE_SYNC (WRITE | REQ_SYNC | REQ_NOIDLE)
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 28d6490..c72d1ad 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -448,10 +448,10 @@ static inline struct rpc_cred *nfs_file_cred(struct file *file)
extern ssize_t nfs_direct_IO(int, struct kiocb *, struct iov_iter *, loff_t);
extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
struct iov_iter *iter,
- loff_t pos, bool uio);
+ loff_t pos);
extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
struct iov_iter *iter,
- loff_t pos, bool uio);
+ loff_t pos);
/*
* linux/fs/nfs/dir.c
diff --git a/include/linux/t10-pi.h b/include/linux/t10-pi.h
new file mode 100644
index 0000000..6a8b994
--- /dev/null
+++ b/include/linux/t10-pi.h
@@ -0,0 +1,22 @@
+#ifndef _LINUX_T10_PI_H
+#define _LINUX_T10_PI_H
+
+#include <linux/types.h>
+#include <linux/blkdev.h>
+
+/*
+ * T10 Protection Information tuple.
+ */
+struct t10_pi_tuple {
+ __be16 guard_tag; /* Checksum */
+ __be16 app_tag; /* Opaque storage */
+ __be32 ref_tag; /* Target LBA or indirect LBA */
+};
+
+
+extern struct blk_integrity t10_pi_type1_crc;
+extern struct blk_integrity t10_pi_type1_ip;
+extern struct blk_integrity t10_pi_type3_crc;
+extern struct blk_integrity t10_pi_type3_ip;
+
+#endif
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 73f3490..522a5f27 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -10,9 +10,10 @@
#include <scsi/scsi_device.h>
struct Scsi_Host;
-struct scsi_device;
struct scsi_driver;
+#include <scsi/scsi_device.h>
+
/*
* MAX_COMMAND_SIZE is:
* The longest fixed-length SCSI CDB as per the SCSI standard.
@@ -81,6 +82,7 @@ struct scsi_cmnd {
unsigned char prot_op;
unsigned char prot_type;
+ unsigned char prot_flags;
unsigned short cmd_len;
enum dma_data_direction sc_data_direction;
@@ -252,6 +254,14 @@ static inline unsigned char scsi_get_prot_op(struct scsi_cmnd *scmd)
return scmd->prot_op;
}
+enum scsi_prot_flags {
+ SCSI_PROT_TRANSFER_PI = 1 << 0,
+ SCSI_PROT_GUARD_CHECK = 1 << 1,
+ SCSI_PROT_REF_CHECK = 1 << 2,
+ SCSI_PROT_REF_INCREMENT = 1 << 3,
+ SCSI_PROT_IP_CHECKSUM = 1 << 4,
+};
+
/*
* The controller usually does not know anything about the target it
* is communicating with. However, when DIX is enabled the controller
@@ -280,6 +290,17 @@ static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
return blk_rq_pos(scmd->request);
}
+static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
+{
+ return scmd->device->sector_size;
+}
+
+static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
+{
+ return blk_rq_pos(scmd->request) >>
+ (ilog2(scsi_prot_interval(scmd)) - 9) & 0xffffffff;
+}
+
static inline unsigned scsi_prot_sg_count(struct scsi_cmnd *cmd)
{
return cmd->prot_sdb ? cmd->prot_sdb->table.nents : 0;
@@ -316,17 +337,12 @@ static inline void set_driver_byte(struct scsi_cmnd *cmd, char status)
static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd)
{
unsigned int xfer_len = scsi_out(scmd)->length;
- unsigned int prot_op = scsi_get_prot_op(scmd);
- unsigned int sector_size = scmd->device->sector_size;
+ unsigned int prot_interval = scsi_prot_interval(scmd);
- switch (prot_op) {
- case SCSI_PROT_NORMAL:
- case SCSI_PROT_WRITE_STRIP:
- case SCSI_PROT_READ_INSERT:
- return xfer_len;
- }
+ if (scmd->prot_flags & SCSI_PROT_TRANSFER_PI)
+ xfer_len += (xfer_len >> ilog2(prot_interval)) * 8;
- return xfer_len + (xfer_len >> ilog2(sector_size)) * 8;
+ return xfer_len;
}
#endif /* _SCSI_SCSI_CMND_H */

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