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-rw-r--r--fs/afs/write.c5
-rw-r--r--fs/btrfs/file.c4
-rw-r--r--fs/cifs/dir.c3
-rw-r--r--fs/cifs/file.c6
-rw-r--r--fs/namei.c9
-rw-r--r--fs/nfs/file.c4
-rw-r--r--fs/nfs/write.c2
-rw-r--r--fs/ocfs2/file.c2
-rw-r--r--fs/sync.c5
-rw-r--r--fs/ubifs/file.c2
-rw-r--r--fs/xfs/linux-2.6/xfs_lrw.c2
11 files changed, 29 insertions, 15 deletions
diff --git a/fs/afs/write.c b/fs/afs/write.c
index c63a3c8beb7..6be1bc31616 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -692,8 +692,9 @@ ssize_t afs_file_write(struct kiocb *iocb, const struct iovec *iov,
}
/* return error values for O_SYNC and IS_SYNC() */
- if (IS_SYNC(&vnode->vfs_inode) || iocb->ki_filp->f_flags & O_SYNC) {
- ret = afs_fsync(iocb->ki_filp, dentry, 1);
+ if (IS_SYNC(&vnode->vfs_inode) || iocb->ki_filp->f_flags & O_DSYNC) {
+ ret = afs_fsync(iocb->ki_filp, dentry,
+ (iocb->ki_filp->f_flags & __O_SYNC) ? 0 : 1);
if (ret < 0)
result = ret;
}
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 06550affbd2..77f759302e1 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -909,7 +909,7 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
unsigned long last_index;
int will_write;
- will_write = ((file->f_flags & O_SYNC) || IS_SYNC(inode) ||
+ will_write = ((file->f_flags & O_DSYNC) || IS_SYNC(inode) ||
(file->f_flags & O_DIRECT));
nrptrs = min((count + PAGE_CACHE_SIZE - 1) / PAGE_CACHE_SIZE,
@@ -1076,7 +1076,7 @@ out_nolock:
if (err)
num_written = err;
- if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) {
+ if ((file->f_flags & O_DSYNC) || IS_SYNC(inode)) {
trans = btrfs_start_transaction(root, 1);
ret = btrfs_log_dentry_safe(trans, root,
file->f_dentry);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 1f42f772865..6ccf7262d1b 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -214,7 +214,8 @@ int cifs_posix_open(char *full_path, struct inode **pinode,
posix_flags |= SMB_O_EXCL;
if (oflags & O_TRUNC)
posix_flags |= SMB_O_TRUNC;
- if (oflags & O_SYNC)
+ /* be safe and imply O_SYNC for O_DSYNC */
+ if (oflags & O_DSYNC)
posix_flags |= SMB_O_SYNC;
if (oflags & O_DIRECTORY)
posix_flags |= SMB_O_DIRECTORY;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 429337eb7af..057e1dae12a 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -76,8 +76,10 @@ static inline fmode_t cifs_posix_convert_flags(unsigned int flags)
reopening a file. They had their effect on the original open */
if (flags & O_APPEND)
posix_flags |= (fmode_t)O_APPEND;
- if (flags & O_SYNC)
- posix_flags |= (fmode_t)O_SYNC;
+ if (flags & O_DSYNC)
+ posix_flags |= (fmode_t)O_DSYNC;
+ if (flags & __O_SYNC)
+ posix_flags |= (fmode_t)__O_SYNC;
if (flags & O_DIRECTORY)
posix_flags |= (fmode_t)O_DIRECTORY;
if (flags & O_NOFOLLOW)
diff --git a/fs/namei.c b/fs/namei.c
index d11f404667e..b83d38f614f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1678,6 +1678,15 @@ struct file *do_filp_open(int dfd, const char *pathname,
int will_write;
int flag = open_to_namei_flags(open_flag);
+ /*
+ * O_SYNC is implemented as __O_SYNC|O_DSYNC. As many places only
+ * check for O_DSYNC if the need any syncing at all we enforce it's
+ * always set instead of having to deal with possibly weird behaviour
+ * for malicious applications setting only __O_SYNC.
+ */
+ if (open_flag & __O_SYNC)
+ open_flag |= O_DSYNC;
+
if (!acc_mode)
acc_mode = MAY_OPEN | ACC_MODE(flag);
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index f5fdd39e037..6b891328f33 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -581,7 +581,7 @@ static int nfs_need_sync_write(struct file *filp, struct inode *inode)
{
struct nfs_open_context *ctx;
- if (IS_SYNC(inode) || (filp->f_flags & O_SYNC))
+ if (IS_SYNC(inode) || (filp->f_flags & O_DSYNC))
return 1;
ctx = nfs_file_open_context(filp);
if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags))
@@ -622,7 +622,7 @@ static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, count);
result = generic_file_aio_write(iocb, iov, nr_segs, pos);
- /* Return error values for O_SYNC and IS_SYNC() */
+ /* Return error values for O_DSYNC and IS_SYNC() */
if (result >= 0 && nfs_need_sync_write(iocb->ki_filp, inode)) {
int err = nfs_do_fsync(nfs_file_open_context(iocb->ki_filp), inode);
if (err < 0)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index c84b5cc1a94..b1ce2ea9b93 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -774,7 +774,7 @@ int nfs_updatepage(struct file *file, struct page *page,
*/
if (nfs_write_pageuptodate(page, inode) &&
inode->i_flock == NULL &&
- !(file->f_flags & O_SYNC)) {
+ !(file->f_flags & O_DSYNC)) {
count = max(count + offset, nfs_page_length(page));
offset = 0;
}
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index de059f49058..3d30a1c974a 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2006,7 +2006,7 @@ out_dio:
/* buffered aio wouldn't have proper lock coverage today */
BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
- if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) {
+ if ((file->f_flags & O_DSYNC && !direct_io) || IS_SYNC(inode)) {
ret = filemap_fdatawrite_range(file->f_mapping, pos,
pos + count - 1);
if (ret < 0)
diff --git a/fs/sync.c b/fs/sync.c
index d104591b066..b75ca68dc08 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -295,10 +295,11 @@ SYSCALL_DEFINE1(fdatasync, unsigned int, fd)
*/
int generic_write_sync(struct file *file, loff_t pos, loff_t count)
{
- if (!(file->f_flags & O_SYNC) && !IS_SYNC(file->f_mapping->host))
+ if (!(file->f_flags & O_DSYNC) && !IS_SYNC(file->f_mapping->host))
return 0;
return vfs_fsync_range(file, file->f_path.dentry, pos,
- pos + count - 1, 1);
+ pos + count - 1,
+ (file->f_flags & __O_SYNC) ? 0 : 1);
}
EXPORT_SYMBOL(generic_write_sync);
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 1009adc8d60..eaa3d480bc2 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1401,7 +1401,7 @@ static ssize_t ubifs_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (ret < 0)
return ret;
- if (ret > 0 && (IS_SYNC(inode) || iocb->ki_filp->f_flags & O_SYNC)) {
+ if (ret > 0 && (IS_SYNC(inode) || iocb->ki_filp->f_flags & O_DSYNC)) {
err = ubifs_sync_wbufs_by_inode(c, inode);
if (err)
return err;
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 072050f8d34..339c52b1a43 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -811,7 +811,7 @@ write_retry:
XFS_STATS_ADD(xs_write_bytes, ret);
/* Handle various SYNC-type writes */
- if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) {
+ if ((file->f_flags & O_DSYNC) || IS_SYNC(inode)) {
loff_t end = pos + ret - 1;
int error2;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 12:32:34 +0000