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Date: Thu, 27 Jul 2017 15:12:40 +0200
From: Jan Kara <jack@...e.cz>
To: <linux-fsdevel@...r.kernel.org>
Cc: <linux-ext4@...r.kernel.org>,
Ross Zwisler <ross.zwisler@...ux.intel.com>,
Dan Williams <dan.j.williams@...el.com>,
Andy Lutomirski <luto@...nel.org>, linux-nvdimm@...ts.01.org,
<linux-xfs@...r.kernel.org>, Christoph Hellwig <hch@...radead.org>,
Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.cz>
Subject: [PATCH 2/7] dax: Add sync argument to dax_iomap_fault()
Add 'sync' argument to dax_iomap_fault(). It will be used to communicate
the fact that synchronous fault is requested.
Signed-off-by: Jan Kara <jack@...e.cz>
---
fs/dax.c | 12 ++++++------
fs/ext2/file.c | 2 +-
fs/ext4/file.c | 2 +-
fs/xfs/xfs_file.c | 8 ++++----
include/linux/dax.h | 2 +-
5 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/fs/dax.c b/fs/dax.c
index 75760f7bdf5d..44d9cce4399b 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1069,7 +1069,7 @@ static int dax_fault_return(int error)
return VM_FAULT_SIGBUS;
}
-static int dax_iomap_pte_fault(struct vm_fault *vmf,
+static int dax_iomap_pte_fault(struct vm_fault *vmf, bool sync,
const struct iomap_ops *ops)
{
struct address_space *mapping = vmf->vma->vm_file->f_mapping;
@@ -1300,7 +1300,7 @@ static int dax_pmd_load_hole(struct vm_fault *vmf, struct iomap *iomap,
return VM_FAULT_FALLBACK;
}
-static int dax_iomap_pmd_fault(struct vm_fault *vmf,
+static int dax_iomap_pmd_fault(struct vm_fault *vmf, bool sync,
const struct iomap_ops *ops)
{
struct vm_area_struct *vma = vmf->vma;
@@ -1422,7 +1422,7 @@ static int dax_iomap_pmd_fault(struct vm_fault *vmf,
return result;
}
#else
-static int dax_iomap_pmd_fault(struct vm_fault *vmf,
+static int dax_iomap_pmd_fault(struct vm_fault *vmf, bool sync,
const struct iomap_ops *ops)
{
return VM_FAULT_FALLBACK;
@@ -1440,13 +1440,13 @@ static int dax_iomap_pmd_fault(struct vm_fault *vmf,
* successfully.
*/
int dax_iomap_fault(struct vm_fault *vmf, enum page_entry_size pe_size,
- const struct iomap_ops *ops)
+ bool sync, const struct iomap_ops *ops)
{
switch (pe_size) {
case PE_SIZE_PTE:
- return dax_iomap_pte_fault(vmf, ops);
+ return dax_iomap_pte_fault(vmf, sync, ops);
case PE_SIZE_PMD:
- return dax_iomap_pmd_fault(vmf, ops);
+ return dax_iomap_pmd_fault(vmf, sync, ops);
default:
return VM_FAULT_FALLBACK;
}
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index ff3a3636a5ca..430e6ecf4e0e 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -99,7 +99,7 @@ static int ext2_dax_fault(struct vm_fault *vmf)
}
down_read(&ei->dax_sem);
- ret = dax_iomap_fault(vmf, PE_SIZE_PTE, &ext2_iomap_ops);
+ ret = dax_iomap_fault(vmf, PE_SIZE_PTE, false, &ext2_iomap_ops);
up_read(&ei->dax_sem);
if (vmf->flags & FAULT_FLAG_WRITE)
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 9dda70edba74..d401403e5095 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -291,7 +291,7 @@ static int ext4_dax_huge_fault(struct vm_fault *vmf,
down_read(&EXT4_I(inode)->i_mmap_sem);
}
if (!IS_ERR(handle))
- result = dax_iomap_fault(vmf, pe_size, &ext4_iomap_ops);
+ result = dax_iomap_fault(vmf, pe_size, false, &ext4_iomap_ops);
else
result = VM_FAULT_SIGBUS;
if (write) {
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 62db8ffa83b9..9fc8b5668578 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1032,7 +1032,7 @@ xfs_filemap_page_mkwrite(
xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
if (IS_DAX(inode)) {
- ret = dax_iomap_fault(vmf, PE_SIZE_PTE, &xfs_iomap_ops);
+ ret = dax_iomap_fault(vmf, PE_SIZE_PTE, false, &xfs_iomap_ops);
} else {
ret = iomap_page_mkwrite(vmf, &xfs_iomap_ops);
ret = block_page_mkwrite_return(ret);
@@ -1059,7 +1059,7 @@ xfs_filemap_fault(
xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
if (IS_DAX(inode))
- ret = dax_iomap_fault(vmf, PE_SIZE_PTE, &xfs_iomap_ops);
+ ret = dax_iomap_fault(vmf, PE_SIZE_PTE, false, &xfs_iomap_ops);
else
ret = filemap_fault(vmf);
xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
@@ -1094,7 +1094,7 @@ xfs_filemap_huge_fault(
}
xfs_ilock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
- ret = dax_iomap_fault(vmf, pe_size, &xfs_iomap_ops);
+ ret = dax_iomap_fault(vmf, pe_size, false, &xfs_iomap_ops);
xfs_iunlock(XFS_I(inode), XFS_MMAPLOCK_SHARED);
if (vmf->flags & FAULT_FLAG_WRITE)
@@ -1130,7 +1130,7 @@ xfs_filemap_pfn_mkwrite(
if (vmf->pgoff >= size)
ret = VM_FAULT_SIGBUS;
else if (IS_DAX(inode))
- ret = dax_iomap_fault(vmf, PE_SIZE_PTE, &xfs_iomap_ops);
+ ret = dax_iomap_fault(vmf, PE_SIZE_PTE, false, &xfs_iomap_ops);
xfs_iunlock(ip, XFS_MMAPLOCK_SHARED);
sb_end_pagefault(inode->i_sb);
return ret;
diff --git a/include/linux/dax.h b/include/linux/dax.h
index d0e32729ad1e..98950f4d127e 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -91,7 +91,7 @@ void dax_write_cache(struct dax_device *dax_dev, bool wc);
ssize_t dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
const struct iomap_ops *ops);
int dax_iomap_fault(struct vm_fault *vmf, enum page_entry_size pe_size,
- const struct iomap_ops *ops);
+ bool sync, const struct iomap_ops *ops);
int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index);
int dax_invalidate_mapping_entry_sync(struct address_space *mapping,
pgoff_t index);
--
2.12.3
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