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mirror O_APPEND and O_DIRECT into iocb->ki_flags

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... avoiding write_iter/fcntl races.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2015-04-09 13:52:01 -04:00
commit 2ba48ce513
11 changed files with 38 additions and 23 deletions
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6
mm/filemap.c
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@ -1694,7 +1694,7 @@ generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
loff_t *ppos = &iocb->ki_pos;
loff_t pos = *ppos;
if (io_is_direct(file)) {
if (iocb->ki_flags & IOCB_DIRECT) {
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
size_t count = iov_iter_count(iter);
@ -2271,7 +2271,7 @@ inline ssize_t generic_write_checks(struct kiocb *iocb, struct iov_iter *from)
return 0;
/* FIXME: this is for backwards compatibility with 2.4 */
if (file->f_flags & O_APPEND)
if (iocb->ki_flags & IOCB_APPEND)
iocb->ki_pos = i_size_read(inode);
pos = iocb->ki_pos;
@ -2545,7 +2545,7 @@ ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (err)
goto out;
if (io_is_direct(file)) {
if (iocb->ki_flags & IOCB_DIRECT) {
loff_t pos, endbyte;
written = generic_file_direct_write(iocb, from, iocb->ki_pos);