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block, fs, drivers: remove REQ_OP compat defs and related code 

This patch drops the compat definition of req_op where it matches
the rq_flag_bits definitions, and drops the related old and compat
code that allowed users to set either the op or flags for the operation.

We also then store the operation in the bi_rw/cmd_flags field similar
to how we used to store the bio ioprio where it sat in the upper bits
of the field.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Mike Christie 2016-06-05 14:32:22 -05:00 committed by Jens Axboe
parent 6296b9604f
commit 4e1b2d52a8
6 changed files with 46 additions and 63 deletions
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2
drivers/scsi/sd.c
View File

@ -1012,7 +1012,7 @@ static int sd_setup_read_write_cmnd(struct scsi_cmnd *SCpnt)
} else if (rq_data_dir(rq) == READ) {
SCpnt->cmnd[0] = READ_6;
} else {
scmd_printk(KERN_ERR, SCpnt, "Unknown command %d,%llx\n",
scmd_printk(KERN_ERR, SCpnt, "Unknown command %llu,%llx\n",
req_op(rq), (unsigned long long) rq->cmd_flags);
goto out;
}

3
include/linux/bio.h
View File

@ -44,9 +44,6 @@
#define BIO_MAX_SIZE (BIO_MAX_PAGES << PAGE_SHIFT)
#define BIO_MAX_SECTORS (BIO_MAX_SIZE >> 9)
#define bio_op(bio) (op_from_rq_bits((bio)->bi_rw))
#define bio_set_op_attrs(bio, op, flags) ((bio)->bi_rw |= (op | flags))
#define bio_prio(bio) (bio)->bi_ioprio
#define bio_set_prio(bio, prio) ((bio)->bi_ioprio = prio)

52
include/linux/blk_types.h
View File

@ -48,7 +48,9 @@ struct bio {
struct block_device *bi_bdev;
unsigned int bi_flags; /* status, command, etc */
int bi_error;
unsigned int bi_rw; /* READ/WRITE */
unsigned int bi_rw; /* bottom bits req flags,
* top bits REQ_OP
*/
unsigned short bi_ioprio;
struct bvec_iter bi_iter;
@ -106,6 +108,16 @@ struct bio {
struct bio_vec bi_inline_vecs[0];
};
#define BIO_OP_SHIFT (8 * sizeof(unsigned int) - REQ_OP_BITS)
#define bio_op(bio) ((bio)->bi_rw >> BIO_OP_SHIFT)
#define bio_set_op_attrs(bio, op, op_flags) do { \
WARN_ON(op >= (1 << REQ_OP_BITS)); \
(bio)->bi_rw &= ((1 << BIO_OP_SHIFT) - 1); \
(bio)->bi_rw |= ((unsigned int) (op) << BIO_OP_SHIFT); \
(bio)->bi_rw |= op_flags; \
} while (0)
#define BIO_RESET_BYTES offsetof(struct bio, bi_max_vecs)
/*
@ -144,7 +156,6 @@ struct bio {
*/
enum rq_flag_bits {
/* common flags */
__REQ_WRITE, /* not set, read. set, write */
__REQ_FAILFAST_DEV, /* no driver retries of device errors */
__REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */
__REQ_FAILFAST_DRIVER, /* no driver retries of driver errors */
@ -152,9 +163,7 @@ enum rq_flag_bits {
__REQ_SYNC, /* request is sync (sync write or read) */
__REQ_META, /* metadata io request */
__REQ_PRIO, /* boost priority in cfq */
__REQ_DISCARD, /* request to discard sectors */
__REQ_SECURE, /* secure discard (used with __REQ_DISCARD) */
__REQ_WRITE_SAME, /* write same block many times */
__REQ_SECURE, /* secure discard (used with REQ_OP_DISCARD) */
__REQ_NOIDLE, /* don't anticipate more IO after this one */
__REQ_INTEGRITY, /* I/O includes block integrity payload */
@ -190,28 +199,22 @@ enum rq_flag_bits {
__REQ_NR_BITS, /* stops here */
};
#define REQ_WRITE (1ULL << __REQ_WRITE)
#define REQ_FAILFAST_DEV (1ULL << __REQ_FAILFAST_DEV)
#define REQ_FAILFAST_TRANSPORT (1ULL << __REQ_FAILFAST_TRANSPORT)
#define REQ_FAILFAST_DRIVER (1ULL << __REQ_FAILFAST_DRIVER)
#define REQ_SYNC (1ULL << __REQ_SYNC)
#define REQ_META (1ULL << __REQ_META)
#define REQ_PRIO (1ULL << __REQ_PRIO)
#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_INTEGRITY | REQ_NOMERGE)
(REQ_FAILFAST_MASK | REQ_SYNC | REQ_META | REQ_PRIO | REQ_NOIDLE | \
REQ_FLUSH | REQ_FUA | REQ_SECURE | REQ_INTEGRITY | REQ_NOMERGE)
#define REQ_CLONE_MASK REQ_COMMON_MASK
#define BIO_NO_ADVANCE_ITER_MASK (REQ_DISCARD|REQ_WRITE_SAME)
/* This mask is used for both bio and request merge checking */
#define REQ_NOMERGE_FLAGS \
(REQ_NOMERGE | REQ_STARTED | REQ_SOFTBARRIER | REQ_FLUSH | REQ_FUA | REQ_FLUSH_SEQ)
@ -243,27 +246,12 @@ enum rq_flag_bits {
enum req_op {
REQ_OP_READ,
REQ_OP_WRITE = REQ_WRITE,
REQ_OP_DISCARD = REQ_DISCARD,
REQ_OP_WRITE_SAME = REQ_WRITE_SAME,
REQ_OP_WRITE,
REQ_OP_DISCARD, /* request to discard sectors */
REQ_OP_WRITE_SAME, /* write same block many times */
};
/*
* tmp cpmpat. Users used to set the write bit for all non reads, but
* we will be dropping the bitmap use for ops. Support both until
* the end of the patchset.
*/
static inline int op_from_rq_bits(u64 flags)
{
if (flags & REQ_OP_DISCARD)
return REQ_OP_DISCARD;
else if (flags & REQ_OP_WRITE_SAME)
return REQ_OP_WRITE_SAME;
else if (flags & REQ_OP_WRITE)
return REQ_OP_WRITE;
else
return REQ_OP_READ;
}
#define REQ_OP_BITS 2
typedef unsigned int blk_qc_t;
#define BLK_QC_T_NONE -1U

14
include/linux/blkdev.h
View File

@ -200,8 +200,15 @@ struct request {
struct request *next_rq;
};
#define req_op(req) (op_from_rq_bits((req)->cmd_flags))
#define req_set_op(req, op) ((req)->cmd_flags |= op)
#define REQ_OP_SHIFT (8 * sizeof(u64) - REQ_OP_BITS)
#define req_op(req) ((req)->cmd_flags >> REQ_OP_SHIFT)
#define req_set_op(req, op) do { \
WARN_ON(op >= (1 << REQ_OP_BITS)); \
(req)->cmd_flags &= ((1ULL << REQ_OP_SHIFT) - 1); \
(req)->cmd_flags |= ((u64) (op) << REQ_OP_SHIFT); \
} while (0)
#define req_set_op_attrs(req, op, flags) do { \
req_set_op(req, op); \
(req)->cmd_flags |= flags; \
@ -604,8 +611,7 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
#define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist)
#define rq_data_dir(rq) \
(op_is_write(op_from_rq_bits(rq->cmd_flags)) ? WRITE : READ)
#define rq_data_dir(rq) (op_is_write(req_op(rq)) ? WRITE : READ)
/*
* Driver can handle struct request, if it either has an old style

37
include/linux/fs.h
View File

@ -152,9 +152,10 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
#define CHECK_IOVEC_ONLY -1
/*
* The below are the various read and write types that we support. Some of
* The below are the various read and write flags that we support. Some of
* them include behavioral modifiers that send information down to the
* block layer and IO scheduler. Terminology:
* block layer and IO scheduler. They should be used along with a req_op.
* Terminology:
*
* The block layer uses device plugging to defer IO a little bit, in
* the hope that we will see more IO very shortly. This increases
@ -193,19 +194,19 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
* non-volatile media on completion.
*
*/
#define RW_MASK REQ_WRITE
#define RW_MASK REQ_OP_WRITE
#define RWA_MASK REQ_RAHEAD
#define READ 0
#define READ REQ_OP_READ
#define WRITE RW_MASK
#define READA RWA_MASK
#define READ_SYNC (READ | REQ_SYNC)
#define WRITE_SYNC (WRITE | REQ_SYNC | REQ_NOIDLE)
#define WRITE_ODIRECT (WRITE | REQ_SYNC)
#define WRITE_FLUSH (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FLUSH)
#define WRITE_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FUA)
#define WRITE_FLUSH_FUA (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_FLUSH | REQ_FUA)
#define READ_SYNC REQ_SYNC
#define WRITE_SYNC (REQ_SYNC | REQ_NOIDLE)
#define WRITE_ODIRECT REQ_SYNC
#define WRITE_FLUSH (REQ_SYNC | REQ_NOIDLE | REQ_FLUSH)
#define WRITE_FUA (REQ_SYNC | REQ_NOIDLE | REQ_FUA)
#define WRITE_FLUSH_FUA (REQ_SYNC | REQ_NOIDLE | REQ_FLUSH | REQ_FUA)
/*
* Attribute flags. These should be or-ed together to figure out what
@ -2464,17 +2465,9 @@ extern void make_bad_inode(struct inode *);
extern bool is_bad_inode(struct inode *);
#ifdef CONFIG_BLOCK
/*
* tmp cpmpat. Users used to set the write bit for all non reads, but
* we will be dropping the bitmap use for ops. Support both until
* the end of the patchset.
*/
static inline bool op_is_write(unsigned long flags)
static inline bool op_is_write(unsigned int op)
{
if (flags & (REQ_OP_WRITE | REQ_OP_WRITE_SAME | REQ_OP_DISCARD))
return true;
else
return false;
return op == REQ_OP_READ ? false : true;
}
/*
@ -2482,7 +2475,7 @@ static inline bool op_is_write(unsigned long flags)
*/
static inline int bio_rw(struct bio *bio)
{
if (op_is_write(op_from_rq_bits(bio->bi_rw)))
if (op_is_write(bio_op(bio)))
return WRITE;
return bio->bi_rw & RWA_MASK;
@ -2493,7 +2486,7 @@ static inline int bio_rw(struct bio *bio)
*/
static inline int bio_data_dir(struct bio *bio)
{
return op_is_write(op_from_rq_bits(bio->bi_rw)) ? WRITE : READ;
return op_is_write(bio_op(bio)) ? WRITE : READ;
}
extern void check_disk_size_change(struct gendisk *disk,

1
include/trace/events/f2fs.h
View File

@ -31,7 +31,6 @@ TRACE_DEFINE_ENUM(BG_GC);
TRACE_DEFINE_ENUM(LFS);
TRACE_DEFINE_ENUM(SSR);
TRACE_DEFINE_ENUM(__REQ_RAHEAD);
TRACE_DEFINE_ENUM(__REQ_WRITE);
TRACE_DEFINE_ENUM(__REQ_SYNC);
TRACE_DEFINE_ENUM(__REQ_NOIDLE);
TRACE_DEFINE_ENUM(__REQ_FLUSH);