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Commit d2d9648e authored by Denys Vlasenko's avatar Denys Vlasenko Committed by Al Viro
Browse files

[PATCH] reuse xxx_fifo_fops for xxx_pipe_fops 



Merge fifo and pipe file_operations.

Signed-off-by: default avatarDenys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent d70b67c8

fs/fifo.c

+4 −4
Original line number Diff line number Diff line
@@ -57,7 +57,7 @@ static int fifo_open(struct inode *inode, struct file *filp) 
	 *  POSIX.1 says that O_NONBLOCK means return with the FIFO

	 *  opened, even when there is no process writing the FIFO.

	 */

		filp->f_op = &read_fifo_fops;

		filp->f_op = &read_pipefifo_fops;

		pipe->r_counter++;

		if (pipe->readers++ == 0)

			wake_up_partner(inode);
@@ -86,7 +86,7 @@ static int fifo_open(struct inode *inode, struct file *filp) 
		if ((filp->f_flags & O_NONBLOCK) && !pipe->readers)

			goto err;



		filp->f_op = &write_fifo_fops;

		filp->f_op = &write_pipefifo_fops;

		pipe->w_counter++;

		if (!pipe->writers++)

			wake_up_partner(inode);
@@ -105,7 +105,7 @@ static int fifo_open(struct inode *inode, struct file *filp) 
	 *  This implementation will NEVER block on a O_RDWR open, since

	 *  the process can at least talk to itself.

	 */

		filp->f_op = &rdwr_fifo_fops;

		filp->f_op = &rdwr_pipefifo_fops;



		pipe->readers++;

		pipe->writers++;
@@ -151,5 +151,5 @@ static int fifo_open(struct inode *inode, struct file *filp) 
 * depending on the access mode of the file...

 */

const struct file_operations def_fifo_fops = {

	.open		= fifo_open,	/* will set read or write pipe_fops */

	.open		= fifo_open,	/* will set read_ or write_pipefifo_fops */

};

fs/pipe.c

+8 −43
Original line number Diff line number Diff line
@@ -777,45 +777,10 @@ pipe_rdwr_open(struct inode *inode, struct file *filp) 
/*

 * The file_operations structs are not static because they

 * are also used in linux/fs/fifo.c to do operations on FIFOs.

 *

 * Pipes reuse fifos' file_operations structs.

 */

const struct file_operations read_fifo_fops = {

	.llseek		= no_llseek,

	.read		= do_sync_read,

	.aio_read	= pipe_read,

	.write		= bad_pipe_w,

	.poll		= pipe_poll,

	.unlocked_ioctl	= pipe_ioctl,

	.open		= pipe_read_open,

	.release	= pipe_read_release,

	.fasync		= pipe_read_fasync,

};



const struct file_operations write_fifo_fops = {

	.llseek		= no_llseek,

	.read		= bad_pipe_r,

	.write		= do_sync_write,

	.aio_write	= pipe_write,

	.poll		= pipe_poll,

	.unlocked_ioctl	= pipe_ioctl,

	.open		= pipe_write_open,

	.release	= pipe_write_release,

	.fasync		= pipe_write_fasync,

};



const struct file_operations rdwr_fifo_fops = {

	.llseek		= no_llseek,

	.read		= do_sync_read,

	.aio_read	= pipe_read,

	.write		= do_sync_write,

	.aio_write	= pipe_write,

	.poll		= pipe_poll,

	.unlocked_ioctl	= pipe_ioctl,

	.open		= pipe_rdwr_open,

	.release	= pipe_rdwr_release,

	.fasync		= pipe_rdwr_fasync,

};



static const struct file_operations read_pipe_fops = {

const struct file_operations read_pipefifo_fops = {

	.llseek		= no_llseek,

	.read		= do_sync_read,

	.aio_read	= pipe_read,
@@ -827,7 +792,7 @@ static const struct file_operations read_pipe_fops = { 
	.fasync		= pipe_read_fasync,

};



static const struct file_operations write_pipe_fops = {

const struct file_operations write_pipefifo_fops = {

	.llseek		= no_llseek,

	.read		= bad_pipe_r,

	.write		= do_sync_write,
@@ -839,7 +804,7 @@ static const struct file_operations write_pipe_fops = { 
	.fasync		= pipe_write_fasync,

};



static const struct file_operations rdwr_pipe_fops = {

const struct file_operations rdwr_pipefifo_fops = {

	.llseek		= no_llseek,

	.read		= do_sync_read,

	.aio_read	= pipe_read,
@@ -927,7 +892,7 @@ static struct inode * get_pipe_inode(void) 
	inode->i_pipe = pipe;



	pipe->readers = pipe->writers = 1;

	inode->i_fop = &rdwr_pipe_fops;

	inode->i_fop = &rdwr_pipefifo_fops;



	/*

	 * Mark the inode dirty from the very beginning,
@@ -978,7 +943,7 @@ struct file *create_write_pipe(int flags) 
	d_instantiate(dentry, inode);



	err = -ENFILE;

	f = alloc_file(pipe_mnt, dentry, FMODE_WRITE, &write_pipe_fops);

	f = alloc_file(pipe_mnt, dentry, FMODE_WRITE, &write_pipefifo_fops);

	if (!f)

		goto err_dentry;

	f->f_mapping = inode->i_mapping;
@@ -1020,7 +985,7 @@ struct file *create_read_pipe(struct file *wrf, int flags) 


	f->f_pos = 0;

	f->f_flags = O_RDONLY | (flags & O_NONBLOCK);

	f->f_op = &read_pipe_fops;

	f->f_op = &read_pipefifo_fops;

	f->f_mode = FMODE_READ;

	f->f_version = 0;

include/linux/fs.h

+3 −3
Original line number Diff line number Diff line
@@ -1696,9 +1696,9 @@ extern void init_special_inode(struct inode *, umode_t, dev_t); 
extern void make_bad_inode(struct inode *);

extern int is_bad_inode(struct inode *);



extern const struct file_operations read_fifo_fops;

extern const struct file_operations write_fifo_fops;

extern const struct file_operations rdwr_fifo_fops;

extern const struct file_operations read_pipefifo_fops;

extern const struct file_operations write_pipefifo_fops;

extern const struct file_operations rdwr_pipefifo_fops;



extern int fs_may_remount_ro(struct super_block *);