INIT_LIST_HEAD(&rq->timeout_list);
rq->cpu = -1;
rq->q = q;
- rq->sector = rq->hard_sector = (sector_t) -1;
+ rq->sector = (sector_t) -1;
INIT_HLIST_NODE(&rq->hash);
RB_CLEAR_NODE(&rq->rb_node);
rq->cmd = rq->__cmd;
(unsigned long long)blk_rq_pos(rq),
blk_rq_sectors(rq), blk_rq_cur_sectors(rq));
printk(KERN_INFO " bio %p, biotail %p, buffer %p, len %u\n",
- rq->bio, rq->biotail,
- rq->buffer, rq->data_len);
+ rq->bio, rq->biotail, rq->buffer, blk_rq_bytes(rq));
if (blk_pc_request(rq)) {
printk(KERN_INFO " cdb: ");
req->cmd_flags |= REQ_NOIDLE;
req->errors = 0;
- req->hard_sector = req->sector = bio->bi_sector;
+ req->sector = bio->bi_sector;
req->ioprio = bio_prio(bio);
blk_rq_bio_prep(req->q, req, bio);
}
static int __make_request(struct request_queue *q, struct bio *bio)
{
struct request *req;
- int el_ret, nr_sectors;
+ int el_ret;
+ unsigned int bytes = bio->bi_size;
const unsigned short prio = bio_prio(bio);
const int sync = bio_sync(bio);
const int unplug = bio_unplug(bio);
int rw_flags;
- nr_sectors = bio_sectors(bio);
-
/*
* low level driver can indicate that it wants pages above a
* certain limit bounced to low memory (ie for highmem, or even
req->biotail->bi_next = bio;
req->biotail = bio;
- req->nr_sectors = req->hard_nr_sectors += nr_sectors;
+ req->data_len += bytes;
req->ioprio = ioprio_best(req->ioprio, prio);
if (!blk_rq_cpu_valid(req))
req->cpu = bio->bi_comp_cpu;
* not touch req->buffer either...
*/
req->buffer = bio_data(bio);
- req->current_nr_sectors = bio_cur_sectors(bio);
- req->hard_cur_sectors = req->current_nr_sectors;
- req->sector = req->hard_sector = bio->bi_sector;
- req->nr_sectors = req->hard_nr_sectors += nr_sectors;
+ req->sector = bio->bi_sector;
+ req->data_len += bytes;
req->ioprio = ioprio_best(req->ioprio, prio);
if (!blk_rq_cpu_valid(req))
req->cpu = bio->bi_comp_cpu;
int blk_rq_check_limits(struct request_queue *q, struct request *rq)
{
if (blk_rq_sectors(rq) > q->max_sectors ||
- rq->data_len > q->max_hw_sectors << 9) {
+ blk_rq_bytes(rq) > q->max_hw_sectors << 9) {
printk(KERN_ERR "%s: over max size limit.\n", __func__);
return -EIO;
}
}
}
-/**
- * blk_rq_bytes - Returns bytes left to complete in the entire request
- * @rq: the request being processed
- **/
-unsigned int blk_rq_bytes(struct request *rq)
-{
- if (blk_fs_request(rq))
- return blk_rq_sectors(rq) << 9;
-
- return rq->data_len;
-}
-EXPORT_SYMBOL_GPL(blk_rq_bytes);
-
-/**
- * blk_rq_cur_bytes - Returns bytes left to complete in the current segment
- * @rq: the request being processed
- **/
-unsigned int blk_rq_cur_bytes(struct request *rq)
-{
- if (blk_fs_request(rq))
- return rq->current_nr_sectors << 9;
-
- if (rq->bio)
- return rq->bio->bi_size;
-
- return rq->data_len;
-}
-EXPORT_SYMBOL_GPL(blk_rq_cur_bytes);
-
struct request *elv_next_request(struct request_queue *q)
{
struct request *rq;
if (rq->cmd_flags & REQ_DONTPREP)
break;
- if (q->dma_drain_size && rq->data_len) {
+ if (q->dma_drain_size && blk_rq_bytes(rq)) {
/*
* make sure space for the drain appears we
* know we can do this because max_hw_segments
* avoid resource deadlock. REQ_STARTED will
* prevent other fs requests from passing this one.
*/
- if (q->dma_drain_size && rq->data_len &&
+ if (q->dma_drain_size && blk_rq_bytes(rq) &&
!(rq->cmd_flags & REQ_DONTPREP)) {
/*
* remove the space for the drain we added
* can find how many bytes remain in the request
* later.
*/
- req->nr_sectors = req->hard_nr_sectors = 0;
- req->current_nr_sectors = req->hard_cur_sectors = 0;
+ req->data_len = 0;
return false;
}
bio_iovec(bio)->bv_len -= nr_bytes;
}
- blk_recalc_rq_sectors(req, total_bytes >> 9);
+ req->data_len -= total_bytes;
+ req->buffer = bio_data(req->bio);
+
+ /* update sector only for requests with clear definition of sector */
+ if (blk_fs_request(req) || blk_discard_rq(req))
+ req->sector += total_bytes >> 9;
+
+ /*
+ * If total number of sectors is less than the first segment
+ * size, something has gone terribly wrong.
+ */
+ if (blk_rq_bytes(req) < blk_rq_cur_bytes(req)) {
+ printk(KERN_ERR "blk: request botched\n");
+ req->data_len = blk_rq_cur_bytes(req);
+ }
+
+ /* recalculate the number of segments */
blk_recalc_rq_segments(req);
+
return true;
}
EXPORT_SYMBOL_GPL(blk_update_request);
rq->nr_phys_segments = bio_phys_segments(q, bio);
rq->buffer = bio_data(bio);
}
- rq->current_nr_sectors = bio_cur_sectors(bio);
- rq->hard_cur_sectors = rq->current_nr_sectors;
- rq->hard_nr_sectors = rq->nr_sectors = bio_sectors(bio);
rq->data_len = bio->bi_size;
-
rq->bio = rq->biotail = bio;
if (bio->bi_bdev)
#include "blk.h"
-void blk_recalc_rq_sectors(struct request *rq, int nsect)
-{
- if (blk_fs_request(rq) || blk_discard_rq(rq)) {
- rq->hard_sector += nsect;
- rq->hard_nr_sectors -= nsect;
-
- /*
- * Move the I/O submission pointers ahead if required.
- */
- if ((rq->nr_sectors >= rq->hard_nr_sectors) &&
- (rq->sector <= rq->hard_sector)) {
- rq->sector = rq->hard_sector;
- rq->nr_sectors = rq->hard_nr_sectors;
- rq->hard_cur_sectors = bio_cur_sectors(rq->bio);
- rq->current_nr_sectors = rq->hard_cur_sectors;
- rq->buffer = bio_data(rq->bio);
- }
-
- /*
- * if total number of sectors is less than the first segment
- * size, something has gone terribly wrong
- */
- if (rq->nr_sectors < rq->current_nr_sectors) {
- printk(KERN_ERR "blk: request botched\n");
- rq->nr_sectors = rq->current_nr_sectors;
- }
- }
-}
-
static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
struct bio *bio)
{
if (unlikely(rq->cmd_flags & REQ_COPY_USER) &&
- (rq->data_len & q->dma_pad_mask)) {
- unsigned int pad_len = (q->dma_pad_mask & ~rq->data_len) + 1;
+ (blk_rq_bytes(rq) & q->dma_pad_mask)) {
+ unsigned int pad_len =
+ (q->dma_pad_mask & ~blk_rq_bytes(rq)) + 1;
sg->length += pad_len;
rq->extra_len += pad_len;
req->biotail->bi_next = next->bio;
req->biotail = next->biotail;
- req->nr_sectors = req->hard_nr_sectors += next->hard_nr_sectors;
+ req->data_len += blk_rq_bytes(next);
elv_merge_requests(q, req, next);
int attempt_back_merge(struct request_queue *q, struct request *rq);
int attempt_front_merge(struct request_queue *q, struct request *rq);
void blk_recalc_rq_segments(struct request *rq);
-void blk_recalc_rq_sectors(struct request *rq, int nsect);
void blk_queue_congestion_threshold(struct request_queue *q);
* Sort strictly based on sector. Smallest to the left,
* largest to the right.
*/
- if (sector > cfqq->next_rq->sector)
+ if (sector > blk_rq_pos(cfqq->next_rq))
n = &(*p)->rb_right;
- else if (sector < cfqq->next_rq->sector)
+ else if (sector < blk_rq_pos(cfqq->next_rq))
n = &(*p)->rb_left;
else
break;
return;
cfqq->p_root = &cfqd->prio_trees[cfqq->org_ioprio];
- __cfqq = cfq_prio_tree_lookup(cfqd, cfqq->p_root, cfqq->next_rq->sector,
- &parent, &p);
+ __cfqq = cfq_prio_tree_lookup(cfqd, cfqq->p_root,
+ blk_rq_pos(cfqq->next_rq), &parent, &p);
if (!__cfqq) {
rb_link_node(&cfqq->p_node, parent, p);
rb_insert_color(&cfqq->p_node, cfqq->p_root);
if (cfq_rq_close(cfqd, __cfqq->next_rq))
return __cfqq;
- if (__cfqq->next_rq->sector < sector)
+ if (blk_rq_pos(__cfqq->next_rq) < sector)
node = rb_next(&__cfqq->p_node);
else
node = rb_prev(&__cfqq->p_node);
#define bio_sectors(bio) ((bio)->bi_size >> 9)
#define bio_empty_barrier(bio) (bio_barrier(bio) && !bio_has_data(bio) && !bio_discard(bio))
-static inline unsigned int bio_cur_sectors(struct bio *bio)
+static inline unsigned int bio_cur_bytes(struct bio *bio)
{
if (bio->bi_vcnt)
- return bio_iovec(bio)->bv_len >> 9;
+ return bio_iovec(bio)->bv_len;
else /* dataless requests such as discard */
- return bio->bi_size >> 9;
+ return bio->bi_size;
}
static inline void *bio_data(struct bio *bio)
enum rq_cmd_type_bits cmd_type;
unsigned long atomic_flags;
- /* Maintain bio traversal state for part by part I/O submission.
- * hard_* are block layer internals, no driver should touch them!
- */
-
- sector_t sector; /* next sector to submit */
- sector_t hard_sector; /* next sector to complete */
- unsigned long nr_sectors; /* no. of sectors left to submit */
- unsigned long hard_nr_sectors; /* no. of sectors left to complete */
- /* no. of sectors left to submit in the current segment */
- unsigned int current_nr_sectors;
-
- /* no. of sectors left to complete in the current segment */
- unsigned int hard_cur_sectors;
+ sector_t sector; /* sector cursor */
+ unsigned int data_len; /* total data len, don't access directly */
struct bio *bio;
struct bio *biotail;
unsigned char __cmd[BLK_MAX_CDB];
unsigned char *cmd;
- unsigned int data_len;
unsigned int extra_len; /* length of alignment and padding */
unsigned int sense_len;
unsigned int resid_len; /* residual count */
*/
static inline sector_t blk_rq_pos(const struct request *rq)
{
- return rq->hard_sector;
+ return rq->sector;
+}
+
+static inline unsigned int blk_rq_bytes(const struct request *rq)
+{
+ return rq->data_len;
}
-extern unsigned int blk_rq_bytes(struct request *rq);
-extern unsigned int blk_rq_cur_bytes(struct request *rq);
+static inline int blk_rq_cur_bytes(const struct request *rq)
+{
+ return rq->bio ? bio_cur_bytes(rq->bio) : 0;
+}
static inline unsigned int blk_rq_sectors(const struct request *rq)
{
- return rq->hard_nr_sectors;
+ return blk_rq_bytes(rq) >> 9;
}
static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
{
- return rq->hard_cur_sectors;
+ return blk_rq_cur_bytes(rq) >> 9;
}
/*
*/
static inline bool blk_end_request_cur(struct request *rq, int error)
{
- return blk_end_request(rq, error, rq->hard_cur_sectors << 9);
+ return blk_end_request(rq, error, blk_rq_cur_bytes(rq));
}
/**
*/
static inline bool __blk_end_request_cur(struct request *rq, int error)
{
- return __blk_end_request(rq, error, rq->hard_cur_sectors << 9);
+ return __blk_end_request(rq, error, blk_rq_cur_bytes(rq));
}
extern void blk_complete_request(struct request *);
ELV_MQUEUE_MUST,
};
-#define rq_end_sector(rq) ((rq)->sector + (rq)->nr_sectors)
+#define rq_end_sector(rq) (blk_rq_pos(rq) + blk_rq_sectors(rq))
#define rb_entry_rq(node) rb_entry((node), struct request, rb_node)
/*
if (blk_pc_request(rq)) {
what |= BLK_TC_ACT(BLK_TC_PC);
- __blk_add_trace(bt, 0, rq->data_len, rw, what, rq->errors,
- rq->cmd_len, rq->cmd);
+ __blk_add_trace(bt, 0, blk_rq_bytes(rq), rw,
+ what, rq->errors, rq->cmd_len, rq->cmd);
} else {
what |= BLK_TC_ACT(BLK_TC_FS);
- __blk_add_trace(bt, blk_rq_pos(rq), blk_rq_sectors(rq) << 9,
- rw, what, rq->errors, 0, NULL);
+ __blk_add_trace(bt, blk_rq_pos(rq), blk_rq_bytes(rq), rw,
+ what, rq->errors, 0, NULL);
}
}
return;
if (blk_pc_request(rq))
- __blk_add_trace(bt, 0, rq->data_len, 0, BLK_TA_DRV_DATA,
- rq->errors, len, data);
+ __blk_add_trace(bt, 0, blk_rq_bytes(rq), 0,
+ BLK_TA_DRV_DATA, rq->errors, len, data);
else
- __blk_add_trace(bt, blk_rq_pos(rq), blk_rq_sectors(rq) << 9,
- 0, BLK_TA_DRV_DATA, rq->errors, len, data);
+ __blk_add_trace(bt, blk_rq_pos(rq), blk_rq_bytes(rq), 0,
+ BLK_TA_DRV_DATA, rq->errors, len, data);
}
EXPORT_SYMBOL_GPL(blk_add_driver_data);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff