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authorRoss Zwisler <[email protected]>2016-01-22 15:10:50 -0800
committerLinus Torvalds <[email protected]>2016-01-22 17:02:18 -0800
commit80b4adcafc076d4179431656b7e83afea99ddec8 (patch)
treed1bb673ff7786fdfb869161100c93117bcd52015
parent9973c98ecfda3a1dfcab981665b5f1e39bcde64a (diff)
ext2: 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 <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: "J. Bruce Fields" <[email protected]> Cc: "Theodore Ts'o" <[email protected]> Cc: Alexander Viro <[email protected]> Cc: Andreas Dilger <[email protected]> Cc: Dave Chinner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jeff Layton <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Dan Williams <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Dave Hansen <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
-rw-r--r--fs/ext2/file.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 11a42c5a09ae..2c88d683cd91 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -102,8 +102,8 @@ static int ext2_dax_pfn_mkwrite(struct vm_area_struct *vma,
{
struct inode *inode = file_inode(vma->vm_file);
struct ext2_inode_info *ei = EXT2_I(inode);
- int ret = VM_FAULT_NOPAGE;
loff_t size;
+ int ret;
sb_start_pagefault(inode->i_sb);
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;
if (vmf->pgoff >= size)
ret = VM_FAULT_SIGBUS;
+ else
+ ret = dax_pfn_mkwrite(vma, vmf);
up_read(&ei->dax_sem);
sb_end_pagefault(inode->i_sb);