Import of Linux 2.2.12 subset (ipv4 stack and related)

1 files changed, 107 insertions, 0 deletions

diff --git a/pfinet/linux-src/include/linux/poll.h b/pfinet/linux-src/include/linux/poll.h
new file mode 100644
index 00000000..972c0cb0
--- /dev/null
+++ b/pfinet/linux-src/include/linux/poll.h
@@ -0,0 +1,107 @@
+#ifndef _LINUX_POLL_H
+#define _LINUX_POLL_H
+
+#include <asm/poll.h>
+
+#ifdef __KERNEL__
+
+#include <linux/wait.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <asm/uaccess.h>
+
+
+struct poll_table_entry {
+	struct file * filp;
+	struct wait_queue wait;
+	struct wait_queue ** wait_address;
+};
+
+typedef struct poll_table_struct {
+	struct poll_table_struct * next;
+	unsigned int nr;
+	struct poll_table_entry * entry;
+} poll_table;
+
+#define __MAX_POLL_TABLE_ENTRIES ((PAGE_SIZE - sizeof (poll_table)) / sizeof (struct poll_table_entry))
+
+extern void __pollwait(struct file * filp, struct wait_queue ** wait_address, poll_table *p);
+
+extern inline void poll_wait(struct file * filp, struct wait_queue ** wait_address, poll_table *p)
+{
+	if (p && wait_address)
+		__pollwait(filp, wait_address, p);
+}
+
+/*
+ * For the kernel fd_set we use a fixed set-size for allocation purposes.
+ * This set-size doesn't necessarily bear any relation to the size the user
+ * uses, but should preferably obviously be larger than any possible user
+ * size (NR_OPEN bits).
+ *
+ * We need 6 bitmaps (in/out/ex for both incoming and outgoing), and we
+ * allocate one page for all the bitmaps. Thus we have 8*PAGE_SIZE bits,
+ * to be divided by 6. And we'd better make sure we round to a full
+ * long-word (in fact, we'll round to 64 bytes).
+ */
+
+
+#define KFDS_64BLOCK ((PAGE_SIZE/(6*64))*64)
+#define KFDS_NR (KFDS_64BLOCK*8 > NR_OPEN ? NR_OPEN : KFDS_64BLOCK*8)
+typedef unsigned long kernel_fd_set[KFDS_NR/__NFDBITS];
+
+/*
+ * Scaleable version of the fd_set.
+ */
+
+typedef struct {
+	unsigned long *in, *out, *ex;
+	unsigned long *res_in, *res_out, *res_ex;
+} fd_set_bits;
+
+#define FDS_BITPERLONG	(8*sizeof(long))
+#define FDS_LONGS(nr)	(((nr)+FDS_BITPERLONG-1)/FDS_BITPERLONG)
+#define FDS_BYTES(nr)	(FDS_LONGS(nr)*sizeof(long))
+
+/*
+ * We do a VERIFY_WRITE here even though we are only reading this time:
+ * we'll write to it eventually..
+ *
+ * Use "unsigned long" accesses to let user-mode fd_set's be long-aligned.
+ */
+static inline
+int get_fd_set(unsigned long nr, void *ufdset, unsigned long *fdset)
+{
+	nr = FDS_BYTES(nr);
+	if (ufdset) {
+		int error;
+		error = verify_area(VERIFY_WRITE, ufdset, nr);
+		if (!error && __copy_from_user(fdset, ufdset, nr))
+			error = -EFAULT;
+		return error;
+	}
+	memset(fdset, 0, nr);
+	return 0;
+}
+
+static inline
+void set_fd_set(unsigned long nr, void *ufdset, unsigned long *fdset)
+{
+	if (ufdset) {
+		nr = FDS_BYTES(nr);
+		__copy_to_user(ufdset, fdset, nr);
+	}
+}
+
+static inline
+void zero_fd_set(unsigned long nr, unsigned long *fdset)
+{
+	nr = FDS_BYTES(nr);
+	memset(fdset, 0, nr);
+}
+
+extern int do_select(int n, fd_set_bits *fds, long *timeout);
+
+#endif /* KERNEL */
+
+#endif /* _LINUX_POLL_H */