Merge branch 'for-4.8/drivers' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:
 "This branch also contains core changes.  I've come to the conclusion
  that from 4.9 and forward, I'll be doing just a single branch.  We
  often have dependencies between core and drivers, and it's hard to
  always split them up appropriately without pulling core into drivers
  when that happens.

  That said, this contains:

   - separate secure erase type for the core block layer, from
     Christoph.

   - set of discard fixes, from Christoph.

   - bio shrinking fixes from Christoph, as a followup up to the
     op/flags change in the core branch.

   - map and append request fixes from Christoph.

   - NVMeF (NVMe over Fabrics) code from Christoph.  This is pretty
     exciting!

   - nvme-loop fixes from Arnd.

   - removal of ->driverfs_dev from Dan, after providing a
     device_add_disk() helper.

   - bcache fixes from Bhaktipriya and Yijing.

   - cdrom subchannel read fix from Vchannaiah.

   - set of lightnvm updates from Wenwei, Matias, Johannes, and Javier.

   - set of drbd updates and fixes from Fabian, Lars, and Philipp.

   - mg_disk error path fix from Bart.

   - user notification for failed device add for loop, from Minfei.

   - NVMe in general:
        + NVMe delay quirk from Guilherme.
        + SR-IOV support and command retry limits from Keith.
        + fix for memory-less NUMA node from Masayoshi.
        + use UINT_MAX for discard sectors, from Minfei.
        + cancel IO fixes from Ming.
        + don't allocate unused major, from Neil.
        + error code fixup from Dan.
        + use constants for PSDT/FUSE from James.
        + variable init fix from Jay.
        + fabrics fixes from Ming, Sagi, and Wei.
        + various fixes"

* 'for-4.8/drivers' of git://git.kernel.dk/linux-block: (115 commits)
  nvme/pci: Provide SR-IOV support
  nvme: initialize variable before logical OR'ing it
  block: unexport various bio mapping helpers
  scsi/osd: open code blk_make_request
  target: stop using blk_make_request
  block: simplify and export blk_rq_append_bio
  block: ensure bios return from blk_get_request are properly initialized
  virtio_blk: use blk_rq_map_kern
  memstick: don't allow REQ_TYPE_BLOCK_PC requests
  block: shrink bio size again
  block: simplify and cleanup bvec pool handling
  block: get rid of bio_rw and READA
  block: don't ignore -EOPNOTSUPP blkdev_issue_write_same
  block: introduce BLKDEV_DISCARD_ZERO to fix zeroout
  NVMe: don't allocate unused nvme_major
  nvme: avoid crashes when node 0 is memoryless node.
  nvme: Limit command retries
  loop: Make user notify for adding loop device failed
  nvme-loop: fix nvme-loop Kconfig dependencies
  nvmet: fix return value check in nvmet_subsys_alloc()
  ...

1 files changed, 16 insertions, 18 deletions

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index ef2c7d2e76c4..ba78b8306674 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -1,7 +1,9 @@
 #ifndef NVM_H
 #define NVM_H
 
+#include <linux/blkdev.h>
 #include <linux/types.h>
+#include <uapi/linux/lightnvm.h>
 
 enum {
 	NVM_IO_OK = 0,
@@ -269,24 +271,15 @@ struct nvm_lun {
 	int lun_id;
 	int chnl_id;
 
-	/* It is up to the target to mark blocks as closed. If the target does
-	 * not do it, all blocks are marked as open, and nr_open_blocks
-	 * represents the number of blocks in use
-	 */
-	unsigned int nr_open_blocks;	/* Number of used, writable blocks */
-	unsigned int nr_closed_blocks;	/* Number of used, read-only blocks */
-	unsigned int nr_free_blocks;	/* Number of unused blocks */
-	unsigned int nr_bad_blocks;	/* Number of bad blocks */
-
 	spinlock_t lock;
 
+	unsigned int nr_free_blocks;	/* Number of unused blocks */
 	struct nvm_block *blocks;
 };
 
 enum {
 	NVM_BLK_ST_FREE =	0x1,	/* Free block */
-	NVM_BLK_ST_OPEN =	0x2,	/* Open block - read-write */
-	NVM_BLK_ST_CLOSED =	0x4,	/* Closed block - read-only */
+	NVM_BLK_ST_TGT =	0x2,	/* Block in use by target */
 	NVM_BLK_ST_BAD =	0x8,	/* Bad block */
 };
 
@@ -385,6 +378,7 @@ static inline struct ppa_addr dev_to_generic_addr(struct nvm_dev *dev,
 {
 	struct ppa_addr l;
 
+	l.ppa = 0;
 	/*
 	 * (r.ppa << X offset) & X len bitmask. X eq. blk, pg, etc.
 	 */
@@ -455,6 +449,8 @@ struct nvm_tgt_type {
 	struct list_head list;
 };
 
+extern struct nvm_tgt_type *nvm_find_target_type(const char *, int);
+
 extern int nvm_register_tgt_type(struct nvm_tgt_type *);
 extern void nvm_unregister_tgt_type(struct nvm_tgt_type *);
 
@@ -463,6 +459,9 @@ extern void nvm_dev_dma_free(struct nvm_dev *, void *, dma_addr_t);
 
 typedef int (nvmm_register_fn)(struct nvm_dev *);
 typedef void (nvmm_unregister_fn)(struct nvm_dev *);
+
+typedef int (nvmm_create_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_create *);
+typedef int (nvmm_remove_tgt_fn)(struct nvm_dev *, struct nvm_ioctl_remove *);
 typedef struct nvm_block *(nvmm_get_blk_fn)(struct nvm_dev *,
 					      struct nvm_lun *, unsigned long);
 typedef void (nvmm_put_blk_fn)(struct nvm_dev *, struct nvm_block *);
@@ -488,9 +487,10 @@ struct nvmm_type {
 	nvmm_register_fn *register_mgr;
 	nvmm_unregister_fn *unregister_mgr;
 
+	nvmm_create_tgt_fn *create_tgt;
+	nvmm_remove_tgt_fn *remove_tgt;
+
 	/* Block administration callbacks */
-	nvmm_get_blk_fn *get_blk_unlocked;
-	nvmm_put_blk_fn *put_blk_unlocked;
 	nvmm_get_blk_fn *get_blk;
 	nvmm_put_blk_fn *put_blk;
 	nvmm_open_blk_fn *open_blk;
@@ -520,10 +520,6 @@ struct nvmm_type {
 extern int nvm_register_mgr(struct nvmm_type *);
 extern void nvm_unregister_mgr(struct nvmm_type *);
 
-extern struct nvm_block *nvm_get_blk_unlocked(struct nvm_dev *,
-					struct nvm_lun *, unsigned long);
-extern void nvm_put_blk_unlocked(struct nvm_dev *, struct nvm_block *);
-
 extern struct nvm_block *nvm_get_blk(struct nvm_dev *, struct nvm_lun *,
 								unsigned long);
 extern void nvm_put_blk(struct nvm_dev *, struct nvm_block *);
@@ -532,11 +528,13 @@ extern int nvm_register(struct request_queue *, char *,
 						struct nvm_dev_ops *);
 extern void nvm_unregister(char *);
 
+void nvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type);
+
 extern int nvm_submit_io(struct nvm_dev *, struct nvm_rq *);
 extern void nvm_generic_to_addr_mode(struct nvm_dev *, struct nvm_rq *);
 extern void nvm_addr_to_generic_mode(struct nvm_dev *, struct nvm_rq *);
 extern int nvm_set_rqd_ppalist(struct nvm_dev *, struct nvm_rq *,
-						struct ppa_addr *, int, int);
+					const struct ppa_addr *, int, int);
 extern void nvm_free_rqd_ppalist(struct nvm_dev *, struct nvm_rq *);
 extern int nvm_erase_ppa(struct nvm_dev *, struct ppa_addr *, int);
 extern int nvm_erase_blk(struct nvm_dev *, struct nvm_block *);