ext4: call dax_pfn_mkwrite() for DAX fsync/msync
To properly support the new DAX fsync/msync infrastructure filesystems need to call dax_pfn_mkwrite() so that DAX can track when user pages are dirtied. Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Dave Chinner <david@fromorbit.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jan Kara <jack@suse.com> Cc: Jeff Layton <jlayton@poochiereds.net> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -291,8 +291,8 @@ static int ext4_dax_pfn_mkwrite(struct vm_area_struct *vma,
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{
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{
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struct inode *inode = file_inode(vma->vm_file);
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struct inode *inode = file_inode(vma->vm_file);
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struct super_block *sb = inode->i_sb;
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struct super_block *sb = inode->i_sb;
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int ret = VM_FAULT_NOPAGE;
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loff_t size;
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loff_t size;
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int ret;
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sb_start_pagefault(sb);
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sb_start_pagefault(sb);
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file_update_time(vma->vm_file);
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file_update_time(vma->vm_file);
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@ -300,6 +300,8 @@ static int ext4_dax_pfn_mkwrite(struct vm_area_struct *vma,
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size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT;
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size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT;
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if (vmf->pgoff >= size)
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if (vmf->pgoff >= size)
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ret = VM_FAULT_SIGBUS;
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ret = VM_FAULT_SIGBUS;
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else
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ret = dax_pfn_mkwrite(vma, vmf);
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up_read(&EXT4_I(inode)->i_mmap_sem);
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up_read(&EXT4_I(inode)->i_mmap_sem);
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sb_end_pagefault(sb);
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sb_end_pagefault(sb);
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