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-rw-r--r--drivers/oprofile/oprofilefs.c300
1 files changed, 0 insertions, 300 deletions
diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c
deleted file mode 100644
index 0875f2f122b3..000000000000
--- a/drivers/oprofile/oprofilefs.c
+++ /dev/null
@@ -1,300 +0,0 @@
-/**
- * @file oprofilefs.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- *
- * A simple filesystem for configuration and
- * access of oprofile.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/oprofile.h>
-#include <linux/fs.h>
-#include <linux/fs_context.h>
-#include <linux/pagemap.h>
-#include <linux/uaccess.h>
-
-#include "oprof.h"
-
-#define OPROFILEFS_MAGIC 0x6f70726f
-
-DEFINE_RAW_SPINLOCK(oprofilefs_lock);
-
-static struct inode *oprofilefs_get_inode(struct super_block *sb, int mode)
-{
- struct inode *inode = new_inode(sb);
-
- if (inode) {
- inode->i_ino = get_next_ino();
- inode->i_mode = mode;
- inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
- }
- return inode;
-}
-
-
-static const struct super_operations s_ops = {
- .statfs = simple_statfs,
- .drop_inode = generic_delete_inode,
-};
-
-
-ssize_t oprofilefs_str_to_user(char const *str, char __user *buf, size_t count, loff_t *offset)
-{
- return simple_read_from_buffer(buf, count, offset, str, strlen(str));
-}
-
-
-#define TMPBUFSIZE 50
-
-ssize_t oprofilefs_ulong_to_user(unsigned long val, char __user *buf, size_t count, loff_t *offset)
-{
- char tmpbuf[TMPBUFSIZE];
- size_t maxlen = snprintf(tmpbuf, TMPBUFSIZE, "%lu\n", val);
- if (maxlen > TMPBUFSIZE)
- maxlen = TMPBUFSIZE;
- return simple_read_from_buffer(buf, count, offset, tmpbuf, maxlen);
-}
-
-
-/*
- * Note: If oprofilefs_ulong_from_user() returns 0, then *val remains
- * unchanged and might be uninitialized. This follows write syscall
- * implementation when count is zero: "If count is zero ... [and if]
- * no errors are detected, 0 will be returned without causing any
- * other effect." (man 2 write)
- */
-int oprofilefs_ulong_from_user(unsigned long *val, char const __user *buf, size_t count)
-{
- char tmpbuf[TMPBUFSIZE];
- unsigned long flags;
-
- if (!count)
- return 0;
-
- if (count > TMPBUFSIZE - 1)
- return -EINVAL;
-
- memset(tmpbuf, 0x0, TMPBUFSIZE);
-
- if (copy_from_user(tmpbuf, buf, count))
- return -EFAULT;
-
- raw_spin_lock_irqsave(&oprofilefs_lock, flags);
- *val = simple_strtoul(tmpbuf, NULL, 0);
- raw_spin_unlock_irqrestore(&oprofilefs_lock, flags);
- return count;
-}
-
-
-static ssize_t ulong_read_file(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
- unsigned long *val = file->private_data;
- return oprofilefs_ulong_to_user(*val, buf, count, offset);
-}
-
-
-static ssize_t ulong_write_file(struct file *file, char const __user *buf, size_t count, loff_t *offset)
-{
- unsigned long value;
- int retval;
-
- if (*offset)
- return -EINVAL;
-
- retval = oprofilefs_ulong_from_user(&value, buf, count);
- if (retval <= 0)
- return retval;
-
- retval = oprofile_set_ulong(file->private_data, value);
- if (retval)
- return retval;
-
- return count;
-}
-
-
-static const struct file_operations ulong_fops = {
- .read = ulong_read_file,
- .write = ulong_write_file,
- .open = simple_open,
- .llseek = default_llseek,
-};
-
-
-static const struct file_operations ulong_ro_fops = {
- .read = ulong_read_file,
- .open = simple_open,
- .llseek = default_llseek,
-};
-
-
-static int __oprofilefs_create_file(struct dentry *root, char const *name,
- const struct file_operations *fops, int perm, void *priv)
-{
- struct dentry *dentry;
- struct inode *inode;
-
- if (!root)
- return -ENOMEM;
-
- inode_lock(d_inode(root));
- dentry = d_alloc_name(root, name);
- if (!dentry) {
- inode_unlock(d_inode(root));
- return -ENOMEM;
- }
- inode = oprofilefs_get_inode(root->d_sb, S_IFREG | perm);
- if (!inode) {
- dput(dentry);
- inode_unlock(d_inode(root));
- return -ENOMEM;
- }
- inode->i_fop = fops;
- inode->i_private = priv;
- d_add(dentry, inode);
- inode_unlock(d_inode(root));
- return 0;
-}
-
-
-int oprofilefs_create_ulong(struct dentry *root,
- char const *name, unsigned long *val)
-{
- return __oprofilefs_create_file(root, name,
- &ulong_fops, 0644, val);
-}
-
-
-int oprofilefs_create_ro_ulong(struct dentry *root,
- char const *name, unsigned long *val)
-{
- return __oprofilefs_create_file(root, name,
- &ulong_ro_fops, 0444, val);
-}
-
-
-static ssize_t atomic_read_file(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
- atomic_t *val = file->private_data;
- return oprofilefs_ulong_to_user(atomic_read(val), buf, count, offset);
-}
-
-
-static const struct file_operations atomic_ro_fops = {
- .read = atomic_read_file,
- .open = simple_open,
- .llseek = default_llseek,
-};
-
-
-int oprofilefs_create_ro_atomic(struct dentry *root,
- char const *name, atomic_t *val)
-{
- return __oprofilefs_create_file(root, name,
- &atomic_ro_fops, 0444, val);
-}
-
-
-int oprofilefs_create_file(struct dentry *root,
- char const *name, const struct file_operations *fops)
-{
- return __oprofilefs_create_file(root, name, fops, 0644, NULL);
-}
-
-
-int oprofilefs_create_file_perm(struct dentry *root,
- char const *name, const struct file_operations *fops, int perm)
-{
- return __oprofilefs_create_file(root, name, fops, perm, NULL);
-}
-
-
-struct dentry *oprofilefs_mkdir(struct dentry *parent, char const *name)
-{
- struct dentry *dentry;
- struct inode *inode;
-
- inode_lock(d_inode(parent));
- dentry = d_alloc_name(parent, name);
- if (!dentry) {
- inode_unlock(d_inode(parent));
- return NULL;
- }
- inode = oprofilefs_get_inode(parent->d_sb, S_IFDIR | 0755);
- if (!inode) {
- dput(dentry);
- inode_unlock(d_inode(parent));
- return NULL;
- }
- inode->i_op = &simple_dir_inode_operations;
- inode->i_fop = &simple_dir_operations;
- d_add(dentry, inode);
- inode_unlock(d_inode(parent));
- return dentry;
-}
-
-
-static int oprofilefs_fill_super(struct super_block *sb, struct fs_context *fc)
-{
- struct inode *root_inode;
-
- sb->s_blocksize = PAGE_SIZE;
- sb->s_blocksize_bits = PAGE_SHIFT;
- sb->s_magic = OPROFILEFS_MAGIC;
- sb->s_op = &s_ops;
- sb->s_time_gran = 1;
-
- root_inode = oprofilefs_get_inode(sb, S_IFDIR | 0755);
- if (!root_inode)
- return -ENOMEM;
- root_inode->i_op = &simple_dir_inode_operations;
- root_inode->i_fop = &simple_dir_operations;
- sb->s_root = d_make_root(root_inode);
- if (!sb->s_root)
- return -ENOMEM;
-
- oprofile_create_files(sb->s_root);
-
- // FIXME: verify kill_litter_super removes our dentries
- return 0;
-}
-
-static int oprofilefs_get_tree(struct fs_context *fc)
-{
- return get_tree_single(fc, oprofilefs_fill_super);
-}
-
-static const struct fs_context_operations oprofilefs_context_ops = {
- .get_tree = oprofilefs_get_tree,
-};
-
-static int oprofilefs_init_fs_context(struct fs_context *fc)
-{
- fc->ops = &oprofilefs_context_ops;
- return 0;
-}
-
-static struct file_system_type oprofilefs_type = {
- .owner = THIS_MODULE,
- .name = "oprofilefs",
- .init_fs_context = oprofilefs_init_fs_context,
- .kill_sb = kill_litter_super,
-};
-MODULE_ALIAS_FS("oprofilefs");
-
-
-int __init oprofilefs_register(void)
-{
- return register_filesystem(&oprofilefs_type);
-}
-
-
-void __exit oprofilefs_unregister(void)
-{
- unregister_filesystem(&oprofilefs_type);
-}