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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-13 10:19:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-13 10:19:16 -0800
commit36869cb93d36269f34800b3384ba7991060a69cf (patch)
tree1ff266dcb3386bb1403494aa89647a96fd2396cd /include/linux/fs.h
parent9439b3710df688d853eb6cb4851256f2c92b1797 (diff)
parent7cd54aa8438947602cf68eda1db327822b9b8e6b (diff)
Merge branch 'for-4.10/block' of git://git.kernel.dk/linux-block
Pull block layer updates from Jens Axboe: "This is the main block pull request this series. Contrary to previous release, I've kept the core and driver changes in the same branch. We always ended up having dependencies between the two for obvious reasons, so makes more sense to keep them together. That said, I'll probably try and keep more topical branches going forward, especially for cycles that end up being as busy as this one. The major parts of this pull request is: - Improved support for O_DIRECT on block devices, with a small private implementation instead of using the pig that is fs/direct-io.c. From Christoph. - Request completion tracking in a scalable fashion. This is utilized by two components in this pull, the new hybrid polling and the writeback queue throttling code. - Improved support for polling with O_DIRECT, adding a hybrid mode that combines pure polling with an initial sleep. From me. - Support for automatic throttling of writeback queues on the block side. This uses feedback from the device completion latencies to scale the queue on the block side up or down. From me. - Support from SMR drives in the block layer and for SD. From Hannes and Shaun. - Multi-connection support for nbd. From Josef. - Cleanup of request and bio flags, so we have a clear split between which are bio (or rq) private, and which ones are shared. From Christoph. - A set of patches from Bart, that improve how we handle queue stopping and starting in blk-mq. - Support for WRITE_ZEROES from Chaitanya. - Lightnvm updates from Javier/Matias. - Supoort for FC for the nvme-over-fabrics code. From James Smart. - A bunch of fixes from a whole slew of people, too many to name here" * 'for-4.10/block' of git://git.kernel.dk/linux-block: (182 commits) blk-stat: fix a few cases of missing batch flushing blk-flush: run the queue when inserting blk-mq flush elevator: make the rqhash helpers exported blk-mq: abstract out blk_mq_dispatch_rq_list() helper blk-mq: add blk_mq_start_stopped_hw_queue() block: improve handling of the magic discard payload blk-wbt: don't throttle discard or write zeroes nbd: use dev_err_ratelimited in io path nbd: reset the setup task for NBD_CLEAR_SOCK nvme-fabrics: Add FC LLDD loopback driver to test FC-NVME nvme-fabrics: Add target support for FC transport nvme-fabrics: Add host support for FC transport nvme-fabrics: Add FC transport LLDD api definitions nvme-fabrics: Add FC transport FC-NVME definitions nvme-fabrics: Add FC transport error codes to nvme.h Add type 0x28 NVME type code to scsi fc headers nvme-fabrics: patch target code in prep for FC transport support nvme-fabrics: set sqe.command_id in core not transports parser: add u64 number parser nvme-rdma: align to generic ib_event logging helper ...
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h68
1 files changed, 1 insertions, 67 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index dc0478c07b2a..b84230e070be 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -28,7 +28,6 @@
#include <linux/uidgid.h>
#include <linux/lockdep.h>
#include <linux/percpu-rwsem.h>
-#include <linux/blk_types.h>
#include <linux/workqueue.h>
#include <linux/percpu-rwsem.h>
#include <linux/delayed_call.h>
@@ -38,6 +37,7 @@
struct backing_dev_info;
struct bdi_writeback;
+struct bio;
struct export_operations;
struct hd_geometry;
struct iovec;
@@ -152,58 +152,6 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
#define CHECK_IOVEC_ONLY -1
/*
- * The below are the various read and write flags that we support. Some of
- * them include behavioral modifiers that send information down to the
- * block layer and IO scheduler. They should be used along with a req_op.
- * Terminology:
- *
- * The block layer uses device plugging to defer IO a little bit, in
- * the hope that we will see more IO very shortly. This increases
- * coalescing of adjacent IO and thus reduces the number of IOs we
- * have to send to the device. It also allows for better queuing,
- * if the IO isn't mergeable. If the caller is going to be waiting
- * for the IO, then he must ensure that the device is unplugged so
- * that the IO is dispatched to the driver.
- *
- * All IO is handled async in Linux. This is fine for background
- * writes, but for reads or writes that someone waits for completion
- * on, we want to notify the block layer and IO scheduler so that they
- * know about it. That allows them to make better scheduling
- * decisions. So when the below references 'sync' and 'async', it
- * is referencing this priority hint.
- *
- * With that in mind, the available types are:
- *
- * READ A normal read operation. Device will be plugged.
- * READ_SYNC A synchronous read. Device is not plugged, caller can
- * immediately wait on this read without caring about
- * unplugging.
- * WRITE A normal async write. Device will be plugged.
- * WRITE_SYNC Synchronous write. Identical to WRITE, but passes down
- * the hint that someone will be waiting on this IO
- * shortly. The write equivalent of READ_SYNC.
- * WRITE_ODIRECT Special case write for O_DIRECT only.
- * WRITE_FLUSH Like WRITE_SYNC but with preceding cache flush.
- * WRITE_FUA Like WRITE_SYNC but data is guaranteed to be on
- * non-volatile media on completion.
- * WRITE_FLUSH_FUA Combination of WRITE_FLUSH and FUA. The IO is preceded
- * by a cache flush and data is guaranteed to be on
- * non-volatile media on completion.
- *
- */
-#define RW_MASK REQ_OP_WRITE
-
-#define READ REQ_OP_READ
-#define WRITE REQ_OP_WRITE
-
-#define READ_SYNC REQ_SYNC
-#define WRITE_SYNC (REQ_SYNC | REQ_NOIDLE)
-#define WRITE_ODIRECT REQ_SYNC
-#define WRITE_FLUSH (REQ_SYNC | REQ_NOIDLE | REQ_PREFLUSH)
-#define WRITE_FUA (REQ_SYNC | REQ_NOIDLE | REQ_FUA)
-#define WRITE_FLUSH_FUA (REQ_SYNC | REQ_NOIDLE | REQ_PREFLUSH | REQ_FUA)
-
-/*
* Attribute flags. These should be or-ed together to figure out what
* has been changed!
*/
@@ -2499,19 +2447,6 @@ extern void make_bad_inode(struct inode *);
extern bool is_bad_inode(struct inode *);
#ifdef CONFIG_BLOCK
-static inline bool op_is_write(unsigned int op)
-{
- return op == REQ_OP_READ ? false : true;
-}
-
-/*
- * return data direction, READ or WRITE
- */
-static inline int bio_data_dir(struct bio *bio)
-{
- return op_is_write(bio_op(bio)) ? WRITE : READ;
-}
-
extern void check_disk_size_change(struct gendisk *disk,
struct block_device *bdev);
extern int revalidate_disk(struct gendisk *);
@@ -2782,7 +2717,6 @@ static inline void remove_inode_hash(struct inode *inode)
extern void inode_sb_list_add(struct inode *inode);
#ifdef CONFIG_BLOCK
-extern blk_qc_t submit_bio(struct bio *);
extern int bdev_read_only(struct block_device *);
#endif
extern int set_blocksize(struct block_device *, int);