[PATCH] reuse xxx_fifo_fops for xxx_pipe_fops
Denys Vlasenko [Tue, 1 Jul 2008 12:16:09 +0000 (14:16 +0200)]
Merge fifo and pipe file_operations.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/fifo.c
fs/pipe.c
include/linux/fs.h

index 9785e36..987bf94 100644 (file)
--- a/fs/fifo.c
+++ b/fs/fifo.c
@@ -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 @@ err_nocleanup:
  * 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 */
 };
index 10c4e9a..fcba654 100644 (file)
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -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;
 
index 53d2edb..7721a2a 100644 (file)
@@ -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 *);