Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 165 insertions, 0 deletions

diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
new file mode 100644
index 000000000000..67423c696c0a
--- /dev/null
+++ b/fs/proc/proc_devtree.c
@@ -0,0 +1,165 @@
+/*
+ * proc_devtree.c - handles /proc/device-tree
+ *
+ * Copyright 1997 Paul Mackerras
+ */
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <asm/prom.h>
+#include <asm/uaccess.h>
+
+#ifndef HAVE_ARCH_DEVTREE_FIXUPS
+static inline void set_node_proc_entry(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+
+static void inline set_node_name_link(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+
+static void inline set_node_addr_link(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+#endif
+
+static struct proc_dir_entry *proc_device_tree;
+
+/*
+ * Supply data on a read from /proc/device-tree/node/property.
+ */
+static int property_read_proc(char *page, char **start, off_t off,
+                              int count, int *eof, void *data)
+{
+        struct property *pp = data;
+        int n;
+
+        if (off >= pp->length) {
+                *eof = 1;
+                return 0;
+        }
+        n = pp->length - off;
+        if (n > count)
+                n = count;
+        else
+                *eof = 1;
+        memcpy(page, pp->value + off, n);
+        *start = page;
+        return n;
+}
+
+/*
+ * For a node with a name like "gc@10", we make symlinks called "gc"
+ * and "@10" to it.
+ */
+
+/*
+ * Process a node, adding entries for its children and its properties.
+ */
+void proc_device_tree_add_node(struct device_node *np, struct proc_dir_entry *de)
+{
+        struct property *pp;
+        struct proc_dir_entry *ent;
+        struct device_node *child, *sib;
+        const char *p, *at;
+        int l;
+        struct proc_dir_entry *list, **lastp, *al;
+
+        set_node_proc_entry(np, de);
+        lastp = &list;
+        for (pp = np->properties; pp != 0; pp = pp->next) {
+                /*
+                 * Unfortunately proc_register puts each new entry
+                 * at the beginning of the list.  So we rearrange them.
+                 */
+                ent = create_proc_read_entry(pp->name, strncmp(pp->name, "security-", 9) ?
+                                             S_IRUGO : S_IRUSR, de, property_read_proc, pp);
+                if (ent == 0)
+                        break;
+                if (!strncmp(pp->name, "security-", 9))
+                     ent->size = 0; /* don't leak number of password chars */
+                else
+                     ent->size = pp->length;
+                *lastp = ent;
+                lastp = &ent->next;
+        }
+        child = NULL;
+        while ((child = of_get_next_child(np, child))) {
+                p = strrchr(child->full_name, '/');
+                if (!p)
+                        p = child->full_name;
+                else
+                        ++p;
+                /* chop off '@0' if the name ends with that */
+                l = strlen(p);
+                if (l > 2 && p[l-2] == '@' && p[l-1] == '0')
+                        l -= 2;
+                ent = proc_mkdir(p, de);
+                if (ent == 0)
+                        break;
+                *lastp = ent;
+                lastp = &ent->next;
+                proc_device_tree_add_node(child, ent);
+
+                /*
+                 * If we left the address part on the name, consider
+                 * adding symlinks from the name and address parts.
+                 */
+                if (p[l] != 0 || (at = strchr(p, '@')) == 0)
+                        continue;
+
+                /*
+                 * If this is the first node with a given name property,
+                 * add a symlink with the name property as its name.
+                 */
+                sib = NULL;
+                while ((sib = of_get_next_child(np, sib)) && sib != child)
+                        if (sib->name && strcmp(sib->name, child->name) == 0)
+                                break;
+                if (sib == child && strncmp(p, child->name, l) != 0) {
+                        al = proc_symlink(child->name, de, ent->name);
+                        if (al == 0) {
+                                of_node_put(sib);
+                                break;
+                        }
+                        set_node_name_link(child, al);
+                        *lastp = al;
+                        lastp = &al->next;
+                }
+                of_node_put(sib);
+                /*
+                 * Add another directory with the @address part as its name.
+                 */
+                al = proc_symlink(at, de, ent->name);
+                if (al == 0)
+                        break;
+                set_node_addr_link(child, al);
+                *lastp = al;
+                lastp = &al->next;
+        }
+        of_node_put(child);
+        *lastp = NULL;
+        de->subdir = list;
+}
+
+/*
+ * Called on initialization to set up the /proc/device-tree subtree
+ */
+void proc_device_tree_init(void)
+{
+        struct device_node *root;
+        if ( !have_of )
+                return;
+        proc_device_tree = proc_mkdir("device-tree", NULL);
+        if (proc_device_tree == 0)
+                return;
+        root = of_find_node_by_path("/");
+        if (root == 0) {
+                printk(KERN_ERR "/proc/device-tree: can't find root\n");
+                return;
+        }
+        proc_device_tree_add_node(root, proc_device_tree);
+        of_node_put(root);
+}