Changes since last update:

- Various cleanups
  - Livelock fixes for eofblocks scanning
  - Improved input verification for on-disk metadata
  - Fix races in the copy on write remap mechanism
  - Fix buffer io error timeout controls
  - Streamlining of directio copy on write
  - Asynchronous discard support
  - Fix asserts when splitting delalloc reservations
  - Don't bloat bmbt when right shifting extents
  - Inode alignment fixes for 32k block sizes
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Merge tag 'xfs-4.11-merge-7' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs updates from Darrick Wong:
 "Here are the XFS changes for 4.11. We aren't introducing any major
  features in this release cycle except for this being the first merge
  window I've managed on my own. :)

  Changes since last update:

   - Various cleanups

   - Livelock fixes for eofblocks scanning

   - Improved input verification for on-disk metadata

   - Fix races in the copy on write remap mechanism

   - Fix buffer io error timeout controls

   - Streamlining of directio copy on write

   - Asynchronous discard support

   - Fix asserts when splitting delalloc reservations

   - Don't bloat bmbt when right shifting extents

   - Inode alignment fixes for 32k block sizes"

* tag 'xfs-4.11-merge-7' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (39 commits)
  xfs: remove XFS_ALLOCTYPE_ANY_AG and XFS_ALLOCTYPE_START_AG
  xfs: simplify xfs_rtallocate_extent
  xfs: tune down agno asserts in the bmap code
  xfs: Use xfs_icluster_size_fsb() to calculate inode chunk alignment
  xfs: don't reserve blocks for right shift transactions
  xfs: fix len comparison in xfs_extent_busy_trim
  xfs: fix uninitialized variable in _reflink_convert_cow
  xfs: split indlen reservations fairly when under reserved
  xfs: handle indlen shortage on delalloc extent merge
  xfs: resurrect debug mode drop buffered writes mechanism
  xfs: clear delalloc and cache on buffered write failure
  xfs: don't block the log commit handler for discards
  xfs: improve busy extent sorting
  xfs: improve handling of busy extents in the low-level allocator
  xfs: don't fail xfs_extent_busy allocation
  xfs: correct null checks and error processing in xfs_initialize_perag
  xfs: update ctime and mtime on clone destinatation inodes
  xfs: allocate direct I/O COW blocks in iomap_begin
  xfs: go straight to real allocations for direct I/O COW writes
  xfs: return the converted extent in __xfs_reflink_convert_cow
  ...

include/linux/dax.h

@@ -37,9 +37,9 @@ static inline void *dax_radix_locked_entry(sector_t sector, unsigned long flags)
 }
 
 ssize_t dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
-		struct iomap_ops *ops);
+		const struct iomap_ops *ops);
 int dax_iomap_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
-			struct iomap_ops *ops);
+			const struct iomap_ops *ops);
 int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index);
 int dax_invalidate_mapping_entry(struct address_space *mapping, pgoff_t index);
 int dax_invalidate_mapping_entry_sync(struct address_space *mapping,
@@ -72,7 +72,7 @@ static inline unsigned int dax_radix_order(void *entry)
 	return 0;
 }
 int dax_iomap_pmd_fault(struct vm_area_struct *vma, unsigned long address,
-		pmd_t *pmd, unsigned int flags, struct iomap_ops *ops);
+		pmd_t *pmd, unsigned int flags, const struct iomap_ops *ops);
 #else
 static inline unsigned int dax_radix_order(void *entry)
 {
@@ -80,7 +80,7 @@ static inline unsigned int dax_radix_order(void *entry)
 }
 static inline int dax_iomap_pmd_fault(struct vm_area_struct *vma,
 		unsigned long address, pmd_t *pmd, unsigned int flags,
-		struct iomap_ops *ops)
+		const struct iomap_ops *ops)
 {
 	return VM_FAULT_FALLBACK;
 }

include/linux/iomap.h

@@ -72,17 +72,17 @@ struct iomap_ops {
 };
 
 ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from,
-		struct iomap_ops *ops);
+		const struct iomap_ops *ops);
 int iomap_file_dirty(struct inode *inode, loff_t pos, loff_t len,
-		struct iomap_ops *ops);
+		const struct iomap_ops *ops);
 int iomap_zero_range(struct inode *inode, loff_t pos, loff_t len,
-		bool *did_zero, struct iomap_ops *ops);
+		bool *did_zero, const struct iomap_ops *ops);
 int iomap_truncate_page(struct inode *inode, loff_t pos, bool *did_zero,
-		struct iomap_ops *ops);
+		const struct iomap_ops *ops);
 int iomap_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
-		struct iomap_ops *ops);
+		const struct iomap_ops *ops);
 int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
-		loff_t start, loff_t len, struct iomap_ops *ops);
+		loff_t start, loff_t len, const struct iomap_ops *ops);
 
 /*
  * Flags for direct I/O ->end_io:
@@ -92,6 +92,6 @@ int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 typedef int (iomap_dio_end_io_t)(struct kiocb *iocb, ssize_t ret,
 		unsigned flags);
 ssize_t iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
-		struct iomap_ops *ops, iomap_dio_end_io_t end_io);
+		const struct iomap_ops *ops, iomap_dio_end_io_t end_io);
 
 #endif /* LINUX_IOMAP_H */