block: add secure discard

[karo-tx-linux.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 6bba04c7ec48f8d19f1f9768dae56e33b112bbaa..2c54906f678f10dd3b861c1de832c40e7405ff43 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -60,7 +60,6 @@ enum rq_cmd_type_bits {
        REQ_TYPE_PM_RESUME,             /* resume request */
        REQ_TYPE_PM_SHUTDOWN,           /* shutdown request */
        REQ_TYPE_SPECIAL,               /* driver defined type */
-       REQ_TYPE_LINUX_BLOCK,           /* generic block layer message */
        /*
         * for ATA/ATAPI devices. this really doesn't belong here, ide should
         * use REQ_TYPE_SPECIAL and use rq->cmd[0] with the range of driver
@@ -70,20 +69,6 @@ enum rq_cmd_type_bits {
        REQ_TYPE_ATA_PC,
 };
 
-/*
- * For request of type REQ_TYPE_LINUX_BLOCK, rq->cmd[0] is the opcode being
- * sent down (similar to how REQ_TYPE_BLOCK_PC means that ->cmd[] holds a
- * SCSI cdb.
- *
- * 0x00 -> 0x3f are driver private, to be used for whatever purpose they need,
- * typically to differentiate REQ_TYPE_SPECIAL requests.
- *
- */
-enum {
-       REQ_LB_OP_EJECT = 0x40,         /* eject request */
-       REQ_LB_OP_FLUSH = 0x41,         /* flush request */
-};
-
 #define BLK_MAX_CDB    16
 
 /*
@@ -212,7 +197,6 @@ struct bvec_merge_data {
 };
 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 *);
 typedef int (lld_busy_fn) (struct request_queue *q);
@@ -286,7 +270,6 @@ struct request_queue
        unprep_rq_fn            *unprep_rq_fn;
        unplug_fn               *unplug_fn;
        merge_bvec_fn           *merge_bvec_fn;
-       prepare_flush_fn        *prepare_flush_fn;
        softirq_done_fn         *softirq_done_fn;
        rq_timed_out_fn         *rq_timed_out_fn;
        dma_drain_needed_fn     *dma_drain_needed;
@@ -406,6 +389,7 @@ struct request_queue
 #define QUEUE_FLAG_DISCARD     16      /* supports DISCARD */
 #define QUEUE_FLAG_NOXMERGES   17      /* No extended merges */
 #define QUEUE_FLAG_ADD_RANDOM  18      /* Contributes to random pool */
+#define QUEUE_FLAG_SECDISCARD  19      /* supports SECDISCARD */
 
 #define QUEUE_FLAG_DEFAULT     ((1 << QUEUE_FLAG_IO_STAT) |            \
                                 (1 << QUEUE_FLAG_CLUSTER) |            \
@@ -541,6 +525,8 @@ enum {
 #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_secdiscard(q)        (blk_queue_discard(q) && \
+       test_bit(QUEUE_FLAG_SECDISCARD, &(q)->queue_flags))
 
 #define blk_noretry_request(rq) \
        ((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \
@@ -896,7 +882,7 @@ extern void blk_queue_softirq_done(struct request_queue *, softirq_done_fn *);
 extern void blk_queue_rq_timed_out(struct request_queue *, rq_timed_out_fn *);
 extern void blk_queue_rq_timeout(struct request_queue *, unsigned int);
 extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
-extern int blk_queue_ordered(struct request_queue *, unsigned, prepare_flush_fn *);
+extern int blk_queue_ordered(struct request_queue *, unsigned);
 extern bool blk_do_ordered(struct request_queue *, struct request **);
 extern unsigned blk_ordered_cur_seq(struct request_queue *);
 extern unsigned blk_ordered_req_seq(struct request *);
@@ -935,10 +921,12 @@ static inline struct request *blk_map_queue_find_tag(struct blk_queue_tag *bqt,
 }
 enum{
        BLKDEV_WAIT,    /* wait for completion */
-       BLKDEV_BARRIER, /*issue request with barrier */
+       BLKDEV_BARRIER, /* issue request with barrier */
+       BLKDEV_SECURE,  /* secure discard */
 };
 #define BLKDEV_IFL_WAIT                (1 << BLKDEV_WAIT)
 #define BLKDEV_IFL_BARRIER     (1 << BLKDEV_BARRIER)
+#define BLKDEV_IFL_SECURE      (1 << BLKDEV_SECURE)
 extern int blkdev_issue_flush(struct block_device *, gfp_t, sector_t *,
                        unsigned long);
 extern int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
@@ -950,7 +938,7 @@ static inline int sb_issue_discard(struct super_block *sb,
 {
        block <<= (sb->s_blocksize_bits - 9);
        nr_blocks <<= (sb->s_blocksize_bits - 9);
-       return blkdev_issue_discard(sb->s_bdev, block, nr_blocks, GFP_KERNEL,
+       return blkdev_issue_discard(sb->s_bdev, block, nr_blocks, GFP_NOFS,
                                   BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER);
 }
 
@@ -1263,7 +1251,6 @@ static inline int blk_integrity_rq(struct request *rq)
 struct block_device_operations {
        int (*open) (struct block_device *, fmode_t);
        int (*release) (struct gendisk *, fmode_t);
-       int (*locked_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
        int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
        int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
        int (*direct_access) (struct block_device *, sector_t,