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, 218 insertions, 0 deletions

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
new file mode 100644
index 000000000000..133c28685105
--- /dev/null
+++ b/fs/proc/inode.c
@@ -0,0 +1,218 @@
+/*
+ *  linux/fs/proc/inode.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ */
+
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/file.h>
+#include <linux/limits.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/smp_lock.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+extern void free_proc_entry(struct proc_dir_entry *);
+
+static inline struct proc_dir_entry * de_get(struct proc_dir_entry *de)
+{
+	if (de)
+		atomic_inc(&de->count);
+	return de;
+}
+
+/*
+ * Decrements the use count and checks for deferred deletion.
+ */
+static void de_put(struct proc_dir_entry *de)
+{
+	if (de) {	
+		lock_kernel();		
+		if (!atomic_read(&de->count)) {
+			printk("de_put: entry %s already free!\n", de->name);
+			unlock_kernel();
+			return;
+		}
+
+		if (atomic_dec_and_test(&de->count)) {
+			if (de->deleted) {
+				printk("de_put: deferred delete of %s\n",
+					de->name);
+				free_proc_entry(de);
+			}
+		}		
+		unlock_kernel();
+	}
+}
+
+/*
+ * Decrement the use count of the proc_dir_entry.
+ */
+static void proc_delete_inode(struct inode *inode)
+{
+	struct proc_dir_entry *de;
+	struct task_struct *tsk;
+
+	/* Let go of any associated process */
+	tsk = PROC_I(inode)->task;
+	if (tsk)
+		put_task_struct(tsk);
+
+	/* Let go of any associated proc directory entry */
+	de = PROC_I(inode)->pde;
+	if (de) {
+		if (de->owner)
+			module_put(de->owner);
+		de_put(de);
+	}
+	clear_inode(inode);
+}
+
+struct vfsmount *proc_mnt;
+
+static void proc_read_inode(struct inode * inode)
+{
+	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+}
+
+static kmem_cache_t * proc_inode_cachep;
+
+static struct inode *proc_alloc_inode(struct super_block *sb)
+{
+	struct proc_inode *ei;
+	struct inode *inode;
+
+	ei = (struct proc_inode *)kmem_cache_alloc(proc_inode_cachep, SLAB_KERNEL);
+	if (!ei)
+		return NULL;
+	ei->task = NULL;
+	ei->type = 0;
+	ei->op.proc_get_link = NULL;
+	ei->pde = NULL;
+	inode = &ei->vfs_inode;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+	return inode;
+}
+
+static void proc_destroy_inode(struct inode *inode)
+{
+	kmem_cache_free(proc_inode_cachep, PROC_I(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+	struct proc_inode *ei = (struct proc_inode *) foo;
+
+	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+	    SLAB_CTOR_CONSTRUCTOR)
+		inode_init_once(&ei->vfs_inode);
+}
+ 
+int __init proc_init_inodecache(void)
+{
+	proc_inode_cachep = kmem_cache_create("proc_inode_cache",
+					     sizeof(struct proc_inode),
+					     0, SLAB_RECLAIM_ACCOUNT,
+					     init_once, NULL);
+	if (proc_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+static int proc_remount(struct super_block *sb, int *flags, char *data)
+{
+	*flags |= MS_NODIRATIME;
+	return 0;
+}
+
+static struct super_operations proc_sops = { 
+	.alloc_inode	= proc_alloc_inode,
+	.destroy_inode	= proc_destroy_inode,
+	.read_inode	= proc_read_inode,
+	.drop_inode	= generic_delete_inode,
+	.delete_inode	= proc_delete_inode,
+	.statfs		= simple_statfs,
+	.remount_fs	= proc_remount,
+};
+
+struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
+				struct proc_dir_entry *de)
+{
+	struct inode * inode;
+
+	/*
+	 * Increment the use count so the dir entry can't disappear.
+	 */
+	de_get(de);
+
+	WARN_ON(de && de->deleted);
+
+	inode = iget(sb, ino);
+	if (!inode)
+		goto out_fail;
+	
+	PROC_I(inode)->pde = de;
+	if (de) {
+		if (de->mode) {
+			inode->i_mode = de->mode;
+			inode->i_uid = de->uid;
+			inode->i_gid = de->gid;
+		}
+		if (de->size)
+			inode->i_size = de->size;
+		if (de->nlink)
+			inode->i_nlink = de->nlink;
+		if (!try_module_get(de->owner))
+			goto out_fail;
+		if (de->proc_iops)
+			inode->i_op = de->proc_iops;
+		if (de->proc_fops)
+			inode->i_fop = de->proc_fops;
+	}
+
+out:
+	return inode;
+
+out_fail:
+	de_put(de);
+	goto out;
+}			
+
+int proc_fill_super(struct super_block *s, void *data, int silent)
+{
+	struct inode * root_inode;
+
+	s->s_flags |= MS_NODIRATIME;
+	s->s_blocksize = 1024;
+	s->s_blocksize_bits = 10;
+	s->s_magic = PROC_SUPER_MAGIC;
+	s->s_op = &proc_sops;
+	s->s_time_gran = 1;
+	
+	root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
+	if (!root_inode)
+		goto out_no_root;
+	/*
+	 * Fixup the root inode's nlink value
+	 */
+	root_inode->i_nlink += nr_processes();
+	root_inode->i_uid = 0;
+	root_inode->i_gid = 0;
+	s->s_root = d_alloc_root(root_inode);
+	if (!s->s_root)
+		goto out_no_root;
+	return 0;
+
+out_no_root:
+	printk("proc_read_super: get root inode failed\n");
+	iput(root_inode);
+	return -ENOMEM;
+}
+MODULE_LICENSE("GPL");