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ext2: call dax_pfn_mkwrite() for DAX fsync/msync

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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>
This commit is contained in:
Ross Zwisler 2016-01-22 15:10:50 -08:00 committed by Linus Torvalds
parent 9973c98ecf
commit 80b4adcafc
1 changed files with 3 additions and 1 deletions
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4
fs/ext2/file.c
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@ -102,8 +102,8 @@ static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma,
{ {
struct inode *inode = file_inode(vma->vm_file); struct inode *inode = file_inode(vma->vm_file);
struct ext2_inode_info *ei = EXT2_I(inode); struct ext2_inode_info *ei = EXT2_I(inode);
int ret = VM_FAULT_NOPAGE;
loff_t size; loff_t size;
int ret;
sb_start_pagefault(inode->i_sb); sb_start_pagefault(inode->i_sb);
file_update_time(vma->vm_file); file_update_time(vma->vm_file);
@ -113,6 +113,8 @@ static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma,
size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT; size = (i_size_read(inode) + PAGE_SIZE - 1) >> PAGE_SHIFT;
if (vmf->pgoff >= size) if (vmf->pgoff >= size)
ret = VM_FAULT_SIGBUS; ret = VM_FAULT_SIGBUS;
else
ret = dax_pfn_mkwrite(vma, vmf);
up_read(&ei->dax_sem); up_read(&ei->dax_sem);
sb_end_pagefault(inode->i_sb); sb_end_pagefault(inode->i_sb);