Merge branch 'for-4.14/block-postmerge' of git://git.kernel.dk/linux-block

Pull followup block layer updates from Jens Axboe:
 "I ended up splitting the main pull request for this series into two,
  mainly because of clashes between NVMe fixes that went into 4.13 after
  the for-4.14 branches were split off. This pull request is mostly
  NVMe, but not exclusively. In detail, it contains:

   - Two pull request for NVMe changes from Christoph. Nothing new on
     the feature front, basically just fixes all over the map for the
     core bits, transport, rdma, etc.

   - Series from Bart, cleaning up various bits in the BFQ scheduler.

   - Series of bcache fixes, which has been lingering for a release or
     two. Coly sent this in, but patches from various people in this
     area.

   - Set of patches for BFQ from Paolo himself, updating both
     documentation and fixing some corner cases in performance.

   - Series from Omar, attempting to now get the 4k loop support
     correct. Our confidence level is higher this time.

   - Series from Shaohua for loop as well, improving O_DIRECT
     performance and fixing a use-after-free"

* 'for-4.14/block-postmerge' of git://git.kernel.dk/linux-block: (74 commits)
  bcache: initialize dirty stripes in flash_dev_run()
  loop: set physical block size to logical block size
  bcache: fix bch_hprint crash and improve output
  bcache: Update continue_at() documentation
  bcache: silence static checker warning
  bcache: fix for gc and write-back race
  bcache: increase the number of open buckets
  bcache: Correct return value for sysfs attach errors
  bcache: correct cache_dirty_target in __update_writeback_rate()
  bcache: gc does not work when triggering by manual command
  bcache: Don't reinvent the wheel but use existing llist API
  bcache: do not subtract sectors_to_gc for bypassed IO
  bcache: fix sequential large write IO bypass
  bcache: Fix leak of bdev reference
  block/loop: remove unused field
  block/loop: fix use after free
  bfq: Use icq_to_bic() consistently
  bfq: Suppress compiler warnings about comparisons
  bfq: Check kstrtoul() return value
  bfq: Declare local functions static
  ...

4 files changed, 60 insertions, 10 deletions

diff --git a/include/linux/nvme-fc-driver.h b/include/linux/nvme-fc-driver.h
index 2591878c1d48..9c5cb4480806 100644
--- a/include/linux/nvme-fc-driver.h
+++ b/include/linux/nvme-fc-driver.h
@@ -624,7 +624,7 @@ struct nvmefc_tgt_fcp_req {
 	u32			timeout;
 	u32			transfer_length;
 	struct fc_ba_rjt	ba_rjt;
-	struct scatterlist	sg[NVME_FC_MAX_SEGMENTS];
+	struct scatterlist	*sg;
 	int			sg_cnt;
 	void			*rspaddr;
 	dma_addr_t		rspdma;
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 8efff888bd9b..5144f9103723 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -32,6 +32,8 @@
 
 #define NVME_RDMA_IP_PORT	4420
 
+#define NVME_NSID_ALL		0xffffffff
+
 enum nvme_subsys_type {
 	NVME_NQN_DISC	= 1,		/* Discovery type target subsystem */
 	NVME_NQN_NVME	= 2,		/* NVME type target subsystem */
@@ -133,19 +135,26 @@ enum {
 enum {
 	NVME_CC_ENABLE		= 1 << 0,
 	NVME_CC_CSS_NVM		= 0 << 4,
+	NVME_CC_EN_SHIFT	= 0,
+	NVME_CC_CSS_SHIFT	= 4,
 	NVME_CC_MPS_SHIFT	= 7,
-	NVME_CC_ARB_RR		= 0 << 11,
-	NVME_CC_ARB_WRRU	= 1 << 11,
-	NVME_CC_ARB_VS		= 7 << 11,
-	NVME_CC_SHN_NONE	= 0 << 14,
-	NVME_CC_SHN_NORMAL	= 1 << 14,
-	NVME_CC_SHN_ABRUPT	= 2 << 14,
-	NVME_CC_SHN_MASK	= 3 << 14,
-	NVME_CC_IOSQES		= NVME_NVM_IOSQES << 16,
-	NVME_CC_IOCQES		= NVME_NVM_IOCQES << 20,
+	NVME_CC_AMS_SHIFT	= 11,
+	NVME_CC_SHN_SHIFT	= 14,
+	NVME_CC_IOSQES_SHIFT	= 16,
+	NVME_CC_IOCQES_SHIFT	= 20,
+	NVME_CC_AMS_RR		= 0 << NVME_CC_AMS_SHIFT,
+	NVME_CC_AMS_WRRU	= 1 << NVME_CC_AMS_SHIFT,
+	NVME_CC_AMS_VS		= 7 << NVME_CC_AMS_SHIFT,
+	NVME_CC_SHN_NONE	= 0 << NVME_CC_SHN_SHIFT,
+	NVME_CC_SHN_NORMAL	= 1 << NVME_CC_SHN_SHIFT,
+	NVME_CC_SHN_ABRUPT	= 2 << NVME_CC_SHN_SHIFT,
+	NVME_CC_SHN_MASK	= 3 << NVME_CC_SHN_SHIFT,
+	NVME_CC_IOSQES		= NVME_NVM_IOSQES << NVME_CC_IOSQES_SHIFT,
+	NVME_CC_IOCQES		= NVME_NVM_IOCQES << NVME_CC_IOCQES_SHIFT,
 	NVME_CSTS_RDY		= 1 << 0,
 	NVME_CSTS_CFS		= 1 << 1,
 	NVME_CSTS_NSSRO		= 1 << 4,
+	NVME_CSTS_PP		= 1 << 5,
 	NVME_CSTS_SHST_NORMAL	= 0 << 2,
 	NVME_CSTS_SHST_OCCUR	= 1 << 2,
 	NVME_CSTS_SHST_CMPLT	= 2 << 2,
@@ -251,6 +260,7 @@ enum {
 	NVME_CTRL_ONCS_WRITE_UNCORRECTABLE	= 1 << 1,
 	NVME_CTRL_ONCS_DSM			= 1 << 2,
 	NVME_CTRL_ONCS_WRITE_ZEROES		= 1 << 3,
+	NVME_CTRL_ONCS_TIMESTAMP		= 1 << 6,
 	NVME_CTRL_VWC_PRESENT			= 1 << 0,
 	NVME_CTRL_OACS_SEC_SUPP                 = 1 << 0,
 	NVME_CTRL_OACS_DIRECTIVES		= 1 << 5,
@@ -376,6 +386,13 @@ struct nvme_smart_log {
 	__u8			rsvd216[296];
 };
 
+struct nvme_fw_slot_info_log {
+	__u8			afi;
+	__u8			rsvd1[7];
+	__le64			frs[7];
+	__u8			rsvd64[448];
+};
+
 enum {
 	NVME_SMART_CRIT_SPARE		= 1 << 0,
 	NVME_SMART_CRIT_TEMPERATURE	= 1 << 1,
@@ -386,6 +403,7 @@ enum {
 
 enum {
 	NVME_AER_NOTICE_NS_CHANGED	= 0x0002,
+	NVME_AER_NOTICE_FW_ACT_STARTING = 0x0102,
 };
 
 struct nvme_lba_range_type {
@@ -677,6 +695,7 @@ enum {
 	NVME_FEAT_ASYNC_EVENT	= 0x0b,
 	NVME_FEAT_AUTO_PST	= 0x0c,
 	NVME_FEAT_HOST_MEM_BUF	= 0x0d,
+	NVME_FEAT_TIMESTAMP	= 0x0e,
 	NVME_FEAT_KATO		= 0x0f,
 	NVME_FEAT_SW_PROGRESS	= 0x80,
 	NVME_FEAT_HOST_ID	= 0x81,
diff --git a/include/linux/string.h b/include/linux/string.h
index c8bdafffd2f0..e1eeb0a8a969 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -230,6 +230,7 @@ static inline const char *kbasename(const char *path)
 void fortify_panic(const char *name) __noreturn __cold;
 void __read_overflow(void) __compiletime_error("detected read beyond size of object passed as 1st parameter");
 void __read_overflow2(void) __compiletime_error("detected read beyond size of object passed as 2nd parameter");
+void __read_overflow3(void) __compiletime_error("detected read beyond size of object passed as 3rd parameter");
 void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");
 
 #if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
@@ -425,4 +426,33 @@ __FORTIFY_INLINE char *strcpy(char *p, const char *q)
 
 #endif
 
+/**
+ * memcpy_and_pad - Copy one buffer to another with padding
+ * @dest: Where to copy to
+ * @dest_len: The destination buffer size
+ * @src: Where to copy from
+ * @count: The number of bytes to copy
+ * @pad: Character to use for padding if space is left in destination.
+ */
+__FORTIFY_INLINE void memcpy_and_pad(void *dest, size_t dest_len,
+				     const void *src, size_t count, int pad)
+{
+	size_t dest_size = __builtin_object_size(dest, 0);
+	size_t src_size = __builtin_object_size(src, 0);
+
+	if (__builtin_constant_p(dest_len) && __builtin_constant_p(count)) {
+		if (dest_size < dest_len && dest_size < count)
+			__write_overflow();
+		else if (src_size < dest_len && src_size < count)
+			__read_overflow3();
+	}
+	if (dest_size < dest_len)
+		fortify_panic(__func__);
+	if (dest_len > count) {
+		memcpy(dest, src, count);
+		memset(dest + count, pad,  dest_len - count);
+	} else
+		memcpy(dest, src, dest_len);
+}
+
 #endif /* _LINUX_STRING_H_ */
diff --git a/include/uapi/linux/loop.h b/include/uapi/linux/loop.h
index c8125ec1f4f2..23158dbe2424 100644
--- a/include/uapi/linux/loop.h
+++ b/include/uapi/linux/loop.h
@@ -88,6 +88,7 @@ struct loop_info64 {
 #define LOOP_CHANGE_FD		0x4C06
 #define LOOP_SET_CAPACITY	0x4C07
 #define LOOP_SET_DIRECT_IO	0x4C08
+#define LOOP_SET_BLOCK_SIZE	0x4C09
 
 /* /dev/loop-control interface */
 #define LOOP_CTL_ADD		0x4C80