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, 137 insertions, 0 deletions

diff --git a/init/do_mounts_devfs.c b/init/do_mounts_devfs.c
new file mode 100644
index 000000000000..cc526474690a
--- /dev/null
+++ b/init/do_mounts_devfs.c
@@ -0,0 +1,137 @@
+
+#include <linux/kernel.h>
+#include <linux/dirent.h>
+#include <linux/string.h>
+
+#include "do_mounts.h"
+
+void __init mount_devfs(void)
+{
+        sys_mount("devfs", "/dev", "devfs", 0, NULL);
+}
+
+void __init umount_devfs(char *path)
+{
+        sys_umount(path, 0);
+}
+
+/*
+ * If the dir will fit in *buf, return its length.  If it won't fit, return
+ * zero.  Return -ve on error.
+ */
+static int __init do_read_dir(int fd, void *buf, int len)
+{
+        long bytes, n;
+        char *p = buf;
+        sys_lseek(fd, 0, 0);
+
+        for (bytes = 0; bytes < len; bytes += n) {
+                n = sys_getdents64(fd, (struct linux_dirent64 *)(p + bytes),
+                                        len - bytes);
+                if (n < 0)
+                        return n;
+                if (n == 0)
+                        return bytes;
+        }
+        return 0;
+}
+
+/*
+ * Try to read all of a directory.  Returns the contents at *p, which
+ * is kmalloced memory.  Returns the number of bytes read at *len.  Returns
+ * NULL on error.
+ */
+static void * __init read_dir(char *path, int *len)
+{
+        int size;
+        int fd = sys_open(path, 0, 0);
+
+        *len = 0;
+        if (fd < 0)
+                return NULL;
+
+        for (size = 1 << 9; size <= (PAGE_SIZE << MAX_ORDER); size <<= 1) {
+                void *p = kmalloc(size, GFP_KERNEL);
+                int n;
+                if (!p)
+                        break;
+                n = do_read_dir(fd, p, size);
+                if (n > 0) {
+                        sys_close(fd);
+                        *len = n;
+                        return p;
+                }
+                kfree(p);
+                if (n == -EINVAL)
+                        continue;       /* Try a larger buffer */
+                if (n < 0)
+                        break;
+        }
+        sys_close(fd);
+        return NULL;
+}
+
+/*
+ * recursively scan <path>, looking for a device node of type <dev>
+ */
+static int __init find_in_devfs(char *path, unsigned dev)
+{
+        char *end = path + strlen(path);
+        int rest = path + 64 - end;
+        int size;
+        char *p = read_dir(path, &size);
+        char *s;
+
+        if (!p)
+                return -1;
+        for (s = p; s < p + size; s += ((struct linux_dirent64 *)s)->d_reclen) {
+                struct linux_dirent64 *d = (struct linux_dirent64 *)s;
+                if (strlen(d->d_name) + 2 > rest)
+                        continue;
+                switch (d->d_type) {
+                        case DT_BLK:
+                                sprintf(end, "/%s", d->d_name);
+                                if (bstat(path) != dev)
+                                        break;
+                                kfree(p);
+                                return 0;
+                        case DT_DIR:
+                                if (strcmp(d->d_name, ".") == 0)
+                                        break;
+                                if (strcmp(d->d_name, "..") == 0)
+                                        break;
+                                sprintf(end, "/%s", d->d_name);
+                                if (find_in_devfs(path, dev) < 0)
+                                        break;
+                                kfree(p);
+                                return 0;
+                }
+        }
+        kfree(p);
+        return -1;
+}
+
+/*
+ * create a device node called <name> which points to
+ * <devfs_name> if possible, otherwise find a device node
+ * which matches <dev> and make <name> a symlink pointing to it.
+ */
+int __init create_dev(char *name, dev_t dev, char *devfs_name)
+{
+        char path[64];
+
+        sys_unlink(name);
+        if (devfs_name && devfs_name[0]) {
+                if (strncmp(devfs_name, "/dev/", 5) == 0)
+                        devfs_name += 5;
+                sprintf(path, "/dev/%s", devfs_name);
+                if (sys_access(path, 0) == 0)
+                        return sys_symlink(devfs_name, name);
+        }
+        if (!dev)
+                return -1;
+        strcpy(path, "/dev");
+        if (find_in_devfs(path, new_encode_dev(dev)) < 0)
+                return -1;
+        return sys_symlink(path + 5, name);
+}