Import of Linux 2.2.12 subset (ipv4 stack and related)

1 files changed, 34 insertions, 0 deletions

diff --git a/pfinet/linux-src/include/linux/pipe_fs_i.h b/pfinet/linux-src/include/linux/pipe_fs_i.h
new file mode 100644
index 00000000..3a847d72
--- /dev/null
+++ b/pfinet/linux-src/include/linux/pipe_fs_i.h
@@ -0,0 +1,34 @@
+#ifndef _LINUX_PIPE_FS_I_H
+#define _LINUX_PIPE_FS_I_H
+
+struct pipe_inode_info {
+	struct wait_queue * wait;
+	char * base;
+	unsigned int start;
+	unsigned int lock;
+	unsigned int rd_openers;
+	unsigned int wr_openers;
+	unsigned int readers;
+	unsigned int writers;
+};
+
+#define PIPE_WAIT(inode)	((inode).u.pipe_i.wait)
+#define PIPE_BASE(inode)	((inode).u.pipe_i.base)
+#define PIPE_START(inode)	((inode).u.pipe_i.start)
+#define PIPE_LEN(inode)		((inode).i_size)
+#define PIPE_RD_OPENERS(inode)	((inode).u.pipe_i.rd_openers)
+#define PIPE_WR_OPENERS(inode)	((inode).u.pipe_i.wr_openers)
+#define PIPE_READERS(inode)	((inode).u.pipe_i.readers)
+#define PIPE_WRITERS(inode)	((inode).u.pipe_i.writers)
+#define PIPE_LOCK(inode)	((inode).u.pipe_i.lock)
+#define PIPE_SIZE(inode)	PIPE_LEN(inode)
+
+#define PIPE_EMPTY(inode)	(PIPE_SIZE(inode)==0)
+#define PIPE_FULL(inode)	(PIPE_SIZE(inode)==PIPE_BUF)
+#define PIPE_FREE(inode)	(PIPE_BUF - PIPE_LEN(inode))
+#define PIPE_END(inode)		((PIPE_START(inode)+PIPE_LEN(inode))&\
+							   (PIPE_BUF-1))
+#define PIPE_MAX_RCHUNK(inode)	(PIPE_BUF - PIPE_START(inode))
+#define PIPE_MAX_WCHUNK(inode)	(PIPE_BUF - PIPE_END(inode))
+
+#endif