X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fblkdev.h;h=ff9d0bdf2a1613b10f45383e2879c9fecbd7929d;hb=cc371e66e340f35eed8dc4651c7c18e754c7fb26;hp=6f79d40dd3c01f25c105b9bdae4f5e70a7c88e1e;hpb=6c47d773e7d8f784996d9027f035379baa19ded7;p=pandora-kernel.git diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 6f79d40dd3c0..ff9d0bdf2a16 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -23,7 +23,6 @@ struct scsi_ioctl_command; struct request_queue; -typedef struct request_queue request_queue_t __deprecated; struct elevator_queue; typedef struct elevator_queue elevator_t; struct request_pm_state; @@ -34,12 +33,6 @@ struct sg_io_hdr; #define BLKDEV_MIN_RQ 4 #define BLKDEV_MAX_RQ 128 /* Default maximum */ -int put_io_context(struct io_context *ioc); -void exit_io_context(void); -struct io_context *get_io_context(gfp_t gfp_flags, int node); -struct io_context *alloc_io_context(gfp_t gfp_flags, int node); -void copy_io_context(struct io_context **pdst, struct io_context **psrc); - struct request; typedef void (rq_end_io_fn)(struct request *, int); @@ -112,6 +105,8 @@ enum rq_flag_bits { __REQ_RW_SYNC, /* request is sync (O_DIRECT) */ __REQ_ALLOCED, /* request came from our alloc pool */ __REQ_RW_META, /* metadata io request */ + __REQ_COPY_USER, /* contains copies of user pages */ + __REQ_INTEGRITY, /* integrity metadata has been remapped */ __REQ_NR_BITS, /* stops here */ }; @@ -133,6 +128,8 @@ enum rq_flag_bits { #define REQ_RW_SYNC (1 << __REQ_RW_SYNC) #define REQ_ALLOCED (1 << __REQ_ALLOCED) #define REQ_RW_META (1 << __REQ_RW_META) +#define REQ_COPY_USER (1 << __REQ_COPY_USER) +#define REQ_INTEGRITY (1 << __REQ_INTEGRITY) #define BLK_MAX_CDB 16 @@ -213,8 +210,9 @@ struct request { /* * when request is used as a packet command carrier */ - unsigned int cmd_len; - unsigned char cmd[BLK_MAX_CDB]; + unsigned short cmd_len; + unsigned char __cmd[BLK_MAX_CDB]; + unsigned char *cmd; unsigned int data_len; unsigned int extra_len; /* length of alignment and padding */ @@ -256,7 +254,14 @@ typedef int (prep_rq_fn) (struct request_queue *, struct request *); typedef void (unplug_fn) (struct request_queue *); struct bio_vec; -typedef int (merge_bvec_fn) (struct request_queue *, struct bio *, struct bio_vec *); +struct bvec_merge_data { + struct block_device *bi_bdev; + sector_t bi_sector; + unsigned bi_size; + unsigned long bi_rw; +}; +typedef int (merge_bvec_fn) (struct request_queue *, struct bvec_merge_data *, + struct bio_vec *); typedef void (prepare_flush_fn) (struct request_queue *, struct request *); typedef void (softirq_done_fn)(struct request *); typedef int (dma_drain_needed_fn)(struct request *); @@ -405,6 +410,41 @@ struct request_queue #define QUEUE_FLAG_PLUGGED 7 /* queue is plugged */ #define QUEUE_FLAG_ELVSWITCH 8 /* don't use elevator, just do FIFO */ #define QUEUE_FLAG_BIDI 9 /* queue supports bidi requests */ +#define QUEUE_FLAG_NOMERGES 10 /* disable merge attempts */ + +static inline int queue_is_locked(struct request_queue *q) +{ +#ifdef CONFIG_SMP + spinlock_t *lock = q->queue_lock; + return lock && spin_is_locked(lock); +#else + return 1; +#endif +} + +static inline void queue_flag_set_unlocked(unsigned int flag, + struct request_queue *q) +{ + __set_bit(flag, &q->queue_flags); +} + +static inline void queue_flag_set(unsigned int flag, struct request_queue *q) +{ + WARN_ON_ONCE(!queue_is_locked(q)); + __set_bit(flag, &q->queue_flags); +} + +static inline void queue_flag_clear_unlocked(unsigned int flag, + struct request_queue *q) +{ + __clear_bit(flag, &q->queue_flags); +} + +static inline void queue_flag_clear(unsigned int flag, struct request_queue *q) +{ + WARN_ON_ONCE(!queue_is_locked(q)); + __clear_bit(flag, &q->queue_flags); +} enum { /* @@ -449,6 +489,7 @@ enum { #define blk_queue_plugged(q) test_bit(QUEUE_FLAG_PLUGGED, &(q)->queue_flags) #define blk_queue_tagged(q) test_bit(QUEUE_FLAG_QUEUED, &(q)->queue_flags) #define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags) +#define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags) #define blk_queue_flushing(q) ((q)->ordseq) #define blk_fs_request(rq) ((rq)->cmd_type == REQ_TYPE_FS) @@ -494,17 +535,17 @@ static inline int blk_queue_full(struct request_queue *q, int rw) static inline void blk_set_queue_full(struct request_queue *q, int rw) { if (rw == READ) - set_bit(QUEUE_FLAG_READFULL, &q->queue_flags); + queue_flag_set(QUEUE_FLAG_READFULL, q); else - set_bit(QUEUE_FLAG_WRITEFULL, &q->queue_flags); + queue_flag_set(QUEUE_FLAG_WRITEFULL, q); } static inline void blk_clear_queue_full(struct request_queue *q, int rw) { if (rw == READ) - clear_bit(QUEUE_FLAG_READFULL, &q->queue_flags); + queue_flag_clear(QUEUE_FLAG_READFULL, q); else - clear_bit(QUEUE_FLAG_WRITEFULL, &q->queue_flags); + queue_flag_clear(QUEUE_FLAG_WRITEFULL, q); } @@ -533,8 +574,13 @@ extern unsigned long blk_max_low_pfn, blk_max_pfn; * BLK_BOUNCE_ANY : don't bounce anything * BLK_BOUNCE_ISA : bounce pages above ISA DMA boundary */ + +#if BITS_PER_LONG == 32 #define BLK_BOUNCE_HIGH ((u64)blk_max_low_pfn << PAGE_SHIFT) -#define BLK_BOUNCE_ANY ((u64)blk_max_pfn << PAGE_SHIFT) +#else +#define BLK_BOUNCE_HIGH -1ULL +#endif +#define BLK_BOUNCE_ANY (-1ULL) #define BLK_BOUNCE_ISA (ISA_DMA_THRESHOLD) /* @@ -576,6 +622,7 @@ extern int blk_register_queue(struct gendisk *disk); extern void blk_unregister_queue(struct gendisk *disk); extern void register_disk(struct gendisk *dev); extern void generic_make_request(struct bio *bio); +extern void blk_rq_init(struct request_queue *q, struct request *rq); extern void blk_put_request(struct request *); extern void __blk_put_request(struct request_queue *, struct request *); extern void blk_end_sync_rq(struct request *rq, int error); @@ -619,6 +666,7 @@ extern void blk_start_queue(struct request_queue *q); extern void blk_stop_queue(struct request_queue *q); extern void blk_sync_queue(struct request_queue *q); extern void __blk_stop_queue(struct request_queue *q); +extern void __blk_run_queue(struct request_queue *); extern void blk_run_queue(struct request_queue *); extern void blk_start_queueing(struct request_queue *); extern int blk_rq_map_user(struct request_queue *, struct request *, void __user *, unsigned long); @@ -630,7 +678,6 @@ extern int blk_execute_rq(struct request_queue *, struct gendisk *, struct request *, int); extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *, struct request *, int, rq_end_io_fn *); -extern int blk_verify_command(unsigned char *, int); extern void blk_unplug(struct request_queue *q); static inline struct request_queue *bdev_get_queue(struct block_device *bdev) @@ -756,6 +803,15 @@ static inline struct request *blk_map_queue_find_tag(struct blk_queue_tag *bqt, extern int blkdev_issue_flush(struct block_device *, sector_t *); +/* +* command filter functions +*/ +extern int blk_verify_command(struct file *file, unsigned char *cmd); +extern int blk_cmd_filter_verify_command(struct blk_scsi_cmd_filter *filter, + unsigned char *cmd, mode_t *f_mode); +extern int blk_register_filter(struct gendisk *disk); +extern void blk_unregister_filter(struct gendisk *disk); + #define MAX_PHYS_SEGMENTS 128 #define MAX_HW_SEGMENTS 128 #define SAFE_MAX_SECTORS 255 @@ -819,28 +875,116 @@ void kblockd_flush_work(struct work_struct *work); #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \ MODULE_ALIAS("block-major-" __stringify(major) "-*") +#if defined(CONFIG_BLK_DEV_INTEGRITY) -#else /* CONFIG_BLOCK */ -/* - * stubs for when the block layer is configured out - */ -#define buffer_heads_over_limit 0 +#define INTEGRITY_FLAG_READ 2 /* verify data integrity on read */ +#define INTEGRITY_FLAG_WRITE 4 /* generate data integrity on write */ -static inline long nr_blockdev_pages(void) +struct blk_integrity_exchg { + void *prot_buf; + void *data_buf; + sector_t sector; + unsigned int data_size; + unsigned short sector_size; + 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); + +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; + + unsigned short flags; + unsigned short tuple_size; + unsigned short sector_size; + unsigned short tag_size; + + const char *name; + + struct kobject kobj; +}; + +extern int blk_integrity_register(struct gendisk *, struct blk_integrity *); +extern void blk_integrity_unregister(struct gendisk *); +extern int blk_integrity_compare(struct block_device *, struct block_device *); +extern int blk_rq_map_integrity_sg(struct request *, struct scatterlist *); +extern int blk_rq_count_integrity_sg(struct request *); + +static inline unsigned short blk_integrity_tuple_size(struct blk_integrity *bi) { + if (bi) + return bi->tuple_size; + return 0; } -static inline void exit_io_context(void) +static inline struct blk_integrity *bdev_get_integrity(struct block_device *bdev) { + return bdev->bd_disk->integrity; } -struct io_context; -static inline int put_io_context(struct io_context *ioc) +static inline unsigned int bdev_get_tag_size(struct block_device *bdev) { - return 1; + struct blk_integrity *bi = bdev_get_integrity(bdev); + + if (bi) + return bi->tag_size; + + return 0; +} + +static inline int bdev_integrity_enabled(struct block_device *bdev, int rw) +{ + struct blk_integrity *bi = bdev_get_integrity(bdev); + + if (bi == NULL) + return 0; + + if (rw == READ && bi->verify_fn != NULL && + (bi->flags & INTEGRITY_FLAG_READ)) + return 1; + + if (rw == WRITE && bi->generate_fn != NULL && + (bi->flags & INTEGRITY_FLAG_WRITE)) + return 1; + + return 0; } +static inline int blk_integrity_rq(struct request *rq) +{ + return bio_integrity(rq->bio); +} + +#else /* CONFIG_BLK_DEV_INTEGRITY */ + +#define blk_integrity_rq(rq) (0) +#define blk_rq_count_integrity_sg(a) (0) +#define blk_rq_map_integrity_sg(a, b) (0) +#define bdev_get_integrity(a) (0) +#define bdev_get_tag_size(a) (0) +#define blk_integrity_compare(a, b) (0) +#define blk_integrity_register(a, b) (0) +#define blk_integrity_unregister(a) do { } while (0); + +#endif /* CONFIG_BLK_DEV_INTEGRITY */ + +#else /* CONFIG_BLOCK */ +/* + * stubs for when the block layer is configured out + */ +#define buffer_heads_over_limit 0 + +static inline long nr_blockdev_pages(void) +{ + return 0; +} #endif /* CONFIG_BLOCK */