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dax: unify ext2/4_{dax,}_file_operations

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The original dax patchset split the ext2/4_file_operations because of the
two NULL splice_read/splice_write in the dax case.

In the vfs if splice_read/splice_write are NULL we then call
default_splice_read/write.

What we do here is make generic_file_splice_read aware of IS_DAX() so the
original ext2/4_file_operations can be used as is.

For write it appears that iter_file_splice_write is just fine.  It uses
the regular f_op->write(file,..) or new_sync_write(file, ...).

Signed-off-by: Boaz Harrosh <boaz@plexistor.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Kirill A. Shutemov <kirill.shutemov@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:
Boaz Harrosh
2015-04-15 16:15:17 -07:00
committed by Linus Torvalds
parent 0e3b210ce1
commit be64f884be
9 changed files with 9 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
fs/ext4/ext4.h
View File

@@ -2593,7 +2593,6 @@ extern const struct file_operations ext4_dir_operations;
/* file.c */
extern const struct inode_operations ext4_file_inode_operations;
extern const struct file_operations ext4_file_operations;
extern const struct file_operations ext4_dax_file_operations;
extern loff_t ext4_llseek(struct file *file, loff_t offset, int origin);
/* inline.c */

20
fs/ext4/file.c
View File

@@ -625,26 +625,6 @@ const struct file_operations ext4_file_operations = {
.fallocate = ext4_fallocate,
};
#ifdef CONFIG_FS_DAX
const struct file_operations ext4_dax_file_operations = {
.llseek = ext4_llseek,
.read = new_sync_read,
.write = new_sync_write,
.read_iter = generic_file_read_iter,
.write_iter = ext4_file_write_iter,
.unlocked_ioctl = ext4_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ext4_compat_ioctl,
#endif
.mmap = ext4_file_mmap,
.open = ext4_file_open,
.release = ext4_release_file,
.fsync = ext4_sync_file,
/* Splice not yet supported with DAX */
.fallocate = ext4_fallocate,
};
#endif
const struct inode_operations ext4_file_inode_operations = {
.setattr = ext4_setattr,
.getattr = ext4_getattr,

5
fs/ext4/inode.c
View File

@@ -4090,10 +4090,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
if (S_ISREG(inode->i_mode)) {
inode->i_op = &ext4_file_inode_operations;
if (test_opt(inode->i_sb, DAX))
inode->i_fop = &ext4_dax_file_operations;
else
inode->i_fop = &ext4_file_operations;
inode->i_fop = &ext4_file_operations;
ext4_set_aops(inode);
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &ext4_dir_inode_operations;

10
fs/ext4/namei.c
View File

@@ -2235,10 +2235,7 @@ retry:
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
inode->i_op = &ext4_file_inode_operations;
if (test_opt(inode->i_sb, DAX))
inode->i_fop = &ext4_dax_file_operations;
else
inode->i_fop = &ext4_file_operations;
inode->i_fop = &ext4_file_operations;
ext4_set_aops(inode);
err = ext4_add_nondir(handle, dentry, inode);
if (!err && IS_DIRSYNC(dir))
@@ -2302,10 +2299,7 @@ retry:
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
inode->i_op = &ext4_file_inode_operations;
if (test_opt(inode->i_sb, DAX))
inode->i_fop = &ext4_dax_file_operations;
else
inode->i_fop = &ext4_file_operations;
inode->i_fop = &ext4_file_operations;
ext4_set_aops(inode);
d_tmpfile(dentry, inode);
err = ext4_orphan_add(handle, inode);