mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
85 lines
2.3 KiB
Diff
85 lines
2.3 KiB
Diff
--- a/fs/Kconfig
|
|
+++ b/fs/Kconfig
|
|
@@ -62,6 +62,11 @@ config FILE_LOCKING
|
|
for filesystems like NFS and for the flock() system
|
|
call. Disabling this option saves about 11k.
|
|
|
|
+config DIRECT_IO
|
|
+ bool "Enable O_DIRECT support" if EXPERT
|
|
+ depends on BLOCK
|
|
+ default y
|
|
+
|
|
source "fs/notify/Kconfig"
|
|
|
|
source "fs/quota/Kconfig"
|
|
--- a/fs/Makefile
|
|
+++ b/fs/Makefile
|
|
@@ -14,7 +14,8 @@ obj-y := open.o read_write.o file_table.
|
|
stack.o fs_struct.o statfs.o
|
|
|
|
ifeq ($(CONFIG_BLOCK),y)
|
|
-obj-y += buffer.o bio.o block_dev.o direct-io.o mpage.o ioprio.o
|
|
+obj-y += buffer.o bio.o block_dev.o mpage.o ioprio.o
|
|
+obj-$(CONFIG_DIRECT_IO) += direct-io.o
|
|
else
|
|
obj-y += no-block.o
|
|
endif
|
|
--- a/include/linux/fs.h
|
|
+++ b/include/linux/fs.h
|
|
@@ -2545,12 +2545,26 @@ enum {
|
|
DIO_SKIP_HOLES = 0x02,
|
|
};
|
|
|
|
+#ifdef CONFIG_DIRECT_IO
|
|
void dio_end_io(struct bio *bio, int error);
|
|
|
|
ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
|
|
struct block_device *bdev, const struct iovec *iov, loff_t offset,
|
|
unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
|
|
dio_submit_t submit_io, int flags);
|
|
+#else
|
|
+static inline void dio_end_io(struct bio *bio, int error)
|
|
+{
|
|
+}
|
|
+static inline ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
|
|
+ struct block_device *bdev, const struct iovec *iov, loff_t offset,
|
|
+ unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
|
|
+ dio_submit_t submit_io, int flags)
|
|
+{
|
|
+ return -EOPNOTSUPP;
|
|
+}
|
|
+#endif
|
|
+
|
|
|
|
static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
|
|
struct inode *inode, const struct iovec *iov, loff_t offset,
|
|
--- a/fs/fcntl.c
|
|
+++ b/fs/fcntl.c
|
|
@@ -51,8 +51,10 @@ static int setfl(int fd, struct file * f
|
|
arg |= O_NONBLOCK;
|
|
|
|
if (arg & O_DIRECT) {
|
|
+#ifdef CONFIG_DIRECT_IO
|
|
if (!filp->f_mapping || !filp->f_mapping->a_ops ||
|
|
!filp->f_mapping->a_ops->direct_IO)
|
|
+#endif
|
|
return -EINVAL;
|
|
}
|
|
|
|
--- a/fs/open.c
|
|
+++ b/fs/open.c
|
|
@@ -665,9 +665,12 @@ int open_check_o_direct(struct file *f)
|
|
{
|
|
/* NB: we're sure to have correct a_ops only after f_op->open */
|
|
if (f->f_flags & O_DIRECT) {
|
|
+#ifdef CONFIG_DIRECT_IO
|
|
if (!f->f_mapping->a_ops ||
|
|
((!f->f_mapping->a_ops->direct_IO) &&
|
|
- (!f->f_mapping->a_ops->get_xip_mem))) {
|
|
+ (!f->f_mapping->a_ops->get_xip_mem)))
|
|
+#endif
|
|
+ {
|
|
return -EINVAL;
|
|
}
|
|
}
|