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Subject[PATCH v4 07/12] ext4, dax: replace IS_DAX() with IS_FSDAX()
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Date
In preparation for fixing the broken definition of S_DAX in the
CONFIG_FS_DAX=n + CONFIG_DEV_DAX=y case, convert all IS_DAX() usages to
use explicit tests for FSDAX since DAX is ambiguous.

Cc: Jan Kara <jack@suse.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: <stable@vger.kernel.org>
Fixes: dee410792419 ("/dev/dax, core: file operations and dax-mmap")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
fs/ext4/file.c | 12 +++++-------
fs/ext4/inode.c | 4 ++--
fs/ext4/ioctl.c | 2 +-
fs/ext4/super.c | 2 +-
4 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 51854e7608f0..561ea843b458 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -48,7 +48,7 @@ static ssize_t ext4_dax_read_iter(struct kiocb *iocb, struct iov_iter *to)
* Recheck under inode lock - at this point we are sure it cannot
* change anymore
*/
- if (!IS_DAX(inode)) {
+ if (!IS_FSDAX(inode)) {
inode_unlock_shared(inode);
/* Fallback to buffered IO in case we cannot support DAX */
return generic_file_read_iter(iocb, to);
@@ -68,7 +68,7 @@ static ssize_t ext4_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
if (!iov_iter_count(to))
return 0; /* skip atime */

- if (IS_DAX(file_inode(iocb->ki_filp)))
+ if (IS_FSDAX(file_inode(iocb->ki_filp)))
return ext4_dax_read_iter(iocb, to);
return generic_file_read_iter(iocb, to);
}
@@ -216,10 +216,8 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
return -EIO;

-#ifdef CONFIG_FS_DAX
- if (IS_DAX(inode))
+ if (IS_FSDAX(inode))
return ext4_dax_write_iter(iocb, from);
-#endif
if (!o_direct && (iocb->ki_flags & IOCB_NOWAIT))
return -EOPNOTSUPP;

@@ -361,11 +359,11 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
* We don't support synchronous mappings for non-DAX files. At least
* until someone comes with a sensible use case.
*/
- if (!IS_DAX(file_inode(file)) && (vma->vm_flags & VM_SYNC))
+ if (!IS_FSDAX(file_inode(file)) && (vma->vm_flags & VM_SYNC))
return -EOPNOTSUPP;

file_accessed(file);
- if (IS_DAX(file_inode(file))) {
+ if (IS_FSDAX(file_inode(file))) {
vma->vm_ops = &ext4_dax_vm_ops;
vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE;
} else {
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index c94780075b04..1879b33aa391 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3858,7 +3858,7 @@ static ssize_t ext4_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
return 0;

/* DAX uses iomap path now */
- if (WARN_ON_ONCE(IS_DAX(inode)))
+ if (WARN_ON_ONCE(IS_FSDAX(inode)))
return 0;

trace_ext4_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
@@ -4076,7 +4076,7 @@ static int ext4_block_zero_page_range(handle_t *handle,
if (length > max || length < 0)
length = max;

- if (IS_DAX(inode)) {
+ if (IS_FSDAX(inode)) {
return iomap_zero_range(inode, from, length, NULL,
&ext4_iomap_ops);
}
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 7e99ad02f1ba..040fc6570ddb 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -790,7 +790,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
"Online defrag not supported with bigalloc");
err = -EOPNOTSUPP;
goto mext_out;
- } else if (IS_DAX(inode)) {
+ } else if (IS_FSDAX(inode)) {
ext4_msg(sb, KERN_ERR,
"Online defrag not supported with DAX");
err = -EOPNOTSUPP;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 39bf464c35f1..933e12940181 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1161,7 +1161,7 @@ static int ext4_set_context(struct inode *inode, const void *ctx, size_t len,
if (inode->i_ino == EXT4_ROOT_INO)
return -EPERM;

- if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode)))
+ if (WARN_ON_ONCE(IS_FSDAX(inode) && i_size_read(inode)))
return -EINVAL;

res = ext4_convert_inline_data(inode);
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