This will allow us to do per-I/O sync file writes, as required by a lot
of fileservers or storage targets.
XXX: Will need a few additional audits for O_DSYNC
---
fs/block_dev.c | 2 +-
fs/btrfs/file.c | 2 +-
fs/cifs/file.c | 2 +-
fs/direct-io.c | 2 +-
fs/ext4/file.c | 2 +-
fs/f2fs/file.c | 2 +-
fs/gfs2/file.c | 5 ++++-
fs/nfs/direct.c | 2 +-
fs/ntfs/file.c | 2 +-
fs/udf/file.c | 2 +-
fs/xfs/xfs_file.c | 2 +-
include/linux/fs.h | 14 ++++++++++----
mm/filemap.c | 2 +-
13 files changed, 25 insertions(+), 16 deletions(-)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 9e1f3fe..d8dc351 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1662,7 +1662,7 @@ ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
ret = __generic_file_write_iter(iocb, from);
if (ret > 0) {
ssize_t err;
- err = generic_write_sync(file, iocb->ki_pos - ret, ret);
+ err = generic_write_sync(iocb, iocb->ki_pos - ret, ret);
if (err < 0)
ret = err;
}
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index d28ec60..9d8e22c 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1852,7 +1852,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
BTRFS_I(inode)->last_sub_trans = root->log_transid;
spin_unlock(&BTRFS_I(inode)->lock);
if (num_written > 0) {
- err = generic_write_sync(file, pos, num_written);
+ err = generic_write_sync(iocb, pos, num_written);
if (err < 0)
num_written = err;
}
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index cb070aa..b22b68c 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -2688,7 +2688,7 @@ out:
inode_unlock(inode);
if (rc > 0) {
- ssize_t err = generic_write_sync(file, iocb->ki_pos - rc, rc);
+ ssize_t err = generic_write_sync(iocb, iocb->ki_pos - rc, rc);
if (err < 0)
rc = err;
}
diff --git a/fs/direct-io.c b/fs/direct-io.c
index c61314b..f7bcc01 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -268,7 +268,7 @@ static ssize_t dio_complete(struct dio *dio, ssize_t ret, bool is_async)
if (dio->rw & WRITE) {
int err;
- err = generic_write_sync(dio->iocb->ki_filp, offset,
+ err = generic_write_sync(dio->iocb, offset,
transferred);
if (err < 0 && ret > 0)
ret = err;
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 0caece3..5915928 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -172,7 +172,7 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (ret > 0) {
ssize_t err;
- err = generic_write_sync(file, iocb->ki_pos - ret, ret);
+ err = generic_write_sync(iocb, iocb->ki_pos - ret, ret);
if (err < 0)
ret = err;
}
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 443e077..51ed838 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1885,7 +1885,7 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (ret > 0) {
ssize_t err;
- err = generic_write_sync(file, iocb->ki_pos - ret, ret);
+ err = generic_write_sync(iocb, iocb->ki_pos - ret, ret);
if (err < 0)
ret = err;
}
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 208efc7..5a7d696 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -895,7 +895,10 @@ static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t
mark_inode_dirty(inode);
}
- return generic_write_sync(file, pos, count);
+ if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host))
+ return vfs_fsync_range(file, pos, pos + count - 1,
+ (file->f_flags & __O_SYNC) ? 0 : 1);
+ return 0;
out_trans_fail:
gfs2_inplace_release(ip);
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 346b5d8..be86de9 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -1054,7 +1054,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, struct iov_iter *iter)
if (i_size_read(inode) < iocb->ki_pos)
i_size_write(inode, iocb->ki_pos);
spin_unlock(&inode->i_lock);
- generic_write_sync(file, pos, result);
+ generic_write_sync(iocb, pos, result);
}
}
nfs_direct_req_release(dreq);
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 91117ad..10dc38c 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -1953,7 +1953,7 @@ static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
current->backing_dev_info = NULL;
inode_unlock(vi);
if (likely(written > 0)) {
- err = generic_write_sync(file, iocb->ki_pos, written);
+ err = generic_write_sync(iocb, iocb->ki_pos, written);
if (err < 0)
written = 0;
}
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 7ab8d81..8e3d1ae 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -152,7 +152,7 @@ out:
if (retval > 0) {
mark_inode_dirty(inode);
- err = generic_write_sync(file, iocb->ki_pos - retval, retval);
+ err = generic_write_sync(iocb, iocb->ki_pos - retval, retval);
if (err < 0)
retval = err;
}
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 5de047a..b5d70e7 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -908,7 +908,7 @@ xfs_file_write_iter(
XFS_STATS_ADD(ip->i_mount, xs_write_bytes, ret);
/* Handle various SYNC-type writes */
- err = generic_write_sync(file, iocb->ki_pos - ret, ret);
+ err = generic_write_sync(iocb, iocb->ki_pos - ret, ret);
if (err < 0)
ret = err;
}
diff --git a/include/linux/fs.h b/include/linux/fs.h
index dc29d12..1e61161 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -323,6 +323,8 @@ struct writeback_control;
#define IOCB_APPEND (1 << 1)
#define IOCB_DIRECT (1 << 2)
#define IOCB_HIPRI (1 << 3)
+#define IOCB_DSYNC (1 << 4)
+#define IOCB_SYNC (1 << 5)
struct kiocb {
struct file *ki_filp;
@@ -2475,12 +2477,12 @@ extern int filemap_fdatawrite_range(struct address_space *mapping,
extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end,
int datasync);
extern int vfs_fsync(struct file *file, int datasync);
-static inline int generic_write_sync(struct file *file, loff_t pos, loff_t count)
+static inline int generic_write_sync(struct kiocb *iocb, loff_t pos, loff_t count)
{
- if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host))
+ if (!(iocb->ki_flags & IOCB_DSYNC))
return 0;
- return vfs_fsync_range(file, pos, pos + count - 1,
- (file->f_flags & __O_SYNC) ? 0 : 1);
+ return vfs_fsync_range(iocb->ki_filp, pos, pos + count - 1,
+ (iocb->ki_flags & IOCB_SYNC) ? 0 : 1);
}
extern void emergency_sync(void);
extern void emergency_remount(void);
@@ -2932,6 +2934,10 @@ static inline int iocb_flags(struct file *file)
res |= IOCB_APPEND;
if (io_is_direct(file))
res |= IOCB_DIRECT;
+ if ((file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host))
+ res |= IOCB_DSYNC;
+ if (file->f_flags & __O_SYNC)
+ res |= IOCB_SYNC;
return res;
}
diff --git a/mm/filemap.c b/mm/filemap.c
index cb36db9..8345d6d 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2794,7 +2794,7 @@ ssize_t generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (ret > 0) {
ssize_t err;
- err = generic_write_sync(file, iocb->ki_pos - ret, ret);
+ err = generic_write_sync(iocb, iocb->ki_pos - ret, ret);
if (err < 0)
ret = err;
}
--
2.1.4
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