diff options
Diffstat (limited to 'kernel/drivers/infiniband/hw/ipath/ipath_fs.c')
| -rw-r--r-- | kernel/drivers/infiniband/hw/ipath/ipath_fs.c | 422 |
1 files changed, 0 insertions, 422 deletions
diff --git a/kernel/drivers/infiniband/hw/ipath/ipath_fs.c b/kernel/drivers/infiniband/hw/ipath/ipath_fs.c deleted file mode 100644 index 1ca8e32a9..000000000 --- a/kernel/drivers/infiniband/hw/ipath/ipath_fs.c +++ /dev/null @@ -1,422 +0,0 @@ -/* - * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved. - * Copyright (c) 2006 PathScale, Inc. All rights reserved. - * - * This software is available to you under a choice of one of two - * licenses. You may choose to be licensed under the terms of the GNU - * General Public License (GPL) Version 2, available from the file - * COPYING in the main directory of this source tree, or the - * OpenIB.org BSD license below: - * - * Redistribution and use in source and binary forms, with or - * without modification, are permitted provided that the following - * conditions are met: - * - * - Redistributions of source code must retain the above - * copyright notice, this list of conditions and the following - * disclaimer. - * - * - Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following - * disclaimer in the documentation and/or other materials - * provided with the distribution. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -#include <linux/module.h> -#include <linux/fs.h> -#include <linux/mount.h> -#include <linux/pagemap.h> -#include <linux/init.h> -#include <linux/namei.h> -#include <linux/slab.h> - -#include "ipath_kernel.h" - -#define IPATHFS_MAGIC 0x726a77 - -static struct super_block *ipath_super; - -static int ipathfs_mknod(struct inode *dir, struct dentry *dentry, - umode_t mode, const struct file_operations *fops, - void *data) -{ - int error; - struct inode *inode = new_inode(dir->i_sb); - - if (!inode) { - error = -EPERM; - goto bail; - } - - inode->i_ino = get_next_ino(); - inode->i_mode = mode; - inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; - inode->i_private = data; - if (S_ISDIR(mode)) { - inode->i_op = &simple_dir_inode_operations; - inc_nlink(inode); - inc_nlink(dir); - } - - inode->i_fop = fops; - - d_instantiate(dentry, inode); - error = 0; - -bail: - return error; -} - -static int create_file(const char *name, umode_t mode, - struct dentry *parent, struct dentry **dentry, - const struct file_operations *fops, void *data) -{ - int error; - - mutex_lock(&d_inode(parent)->i_mutex); - *dentry = lookup_one_len(name, parent, strlen(name)); - if (!IS_ERR(*dentry)) - error = ipathfs_mknod(d_inode(parent), *dentry, - mode, fops, data); - else - error = PTR_ERR(*dentry); - mutex_unlock(&d_inode(parent)->i_mutex); - - return error; -} - -static ssize_t atomic_stats_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - return simple_read_from_buffer(buf, count, ppos, &ipath_stats, - sizeof ipath_stats); -} - -static const struct file_operations atomic_stats_ops = { - .read = atomic_stats_read, - .llseek = default_llseek, -}; - -static ssize_t atomic_counters_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct infinipath_counters counters; - struct ipath_devdata *dd; - - dd = file_inode(file)->i_private; - dd->ipath_f_read_counters(dd, &counters); - - return simple_read_from_buffer(buf, count, ppos, &counters, - sizeof counters); -} - -static const struct file_operations atomic_counters_ops = { - .read = atomic_counters_read, - .llseek = default_llseek, -}; - -static ssize_t flash_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - struct ipath_devdata *dd; - ssize_t ret; - loff_t pos; - char *tmp; - - pos = *ppos; - - if ( pos < 0) { - ret = -EINVAL; - goto bail; - } - - if (pos >= sizeof(struct ipath_flash)) { - ret = 0; - goto bail; - } - - if (count > sizeof(struct ipath_flash) - pos) - count = sizeof(struct ipath_flash) - pos; - - tmp = kmalloc(count, GFP_KERNEL); - if (!tmp) { - ret = -ENOMEM; - goto bail; - } - - dd = file_inode(file)->i_private; - if (ipath_eeprom_read(dd, pos, tmp, count)) { - ipath_dev_err(dd, "failed to read from flash\n"); - ret = -ENXIO; - goto bail_tmp; - } - - if (copy_to_user(buf, tmp, count)) { - ret = -EFAULT; - goto bail_tmp; - } - - *ppos = pos + count; - ret = count; - -bail_tmp: - kfree(tmp); - -bail: - return ret; -} - -static ssize_t flash_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) -{ - struct ipath_devdata *dd; - ssize_t ret; - loff_t pos; - char *tmp; - - pos = *ppos; - - if (pos != 0) { - ret = -EINVAL; - goto bail; - } - - if (count != sizeof(struct ipath_flash)) { - ret = -EINVAL; - goto bail; - } - - tmp = kmalloc(count, GFP_KERNEL); - if (!tmp) { - ret = -ENOMEM; - goto bail; - } - - if (copy_from_user(tmp, buf, count)) { - ret = -EFAULT; - goto bail_tmp; - } - - dd = file_inode(file)->i_private; - if (ipath_eeprom_write(dd, pos, tmp, count)) { - ret = -ENXIO; - ipath_dev_err(dd, "failed to write to flash\n"); - goto bail_tmp; - } - - *ppos = pos + count; - ret = count; - -bail_tmp: - kfree(tmp); - -bail: - return ret; -} - -static const struct file_operations flash_ops = { - .read = flash_read, - .write = flash_write, - .llseek = default_llseek, -}; - -static int create_device_files(struct super_block *sb, - struct ipath_devdata *dd) -{ - struct dentry *dir, *tmp; - char unit[10]; - int ret; - - snprintf(unit, sizeof unit, "%02d", dd->ipath_unit); - ret = create_file(unit, S_IFDIR|S_IRUGO|S_IXUGO, sb->s_root, &dir, - &simple_dir_operations, dd); - if (ret) { - printk(KERN_ERR "create_file(%s) failed: %d\n", unit, ret); - goto bail; - } - - ret = create_file("atomic_counters", S_IFREG|S_IRUGO, dir, &tmp, - &atomic_counters_ops, dd); - if (ret) { - printk(KERN_ERR "create_file(%s/atomic_counters) " - "failed: %d\n", unit, ret); - goto bail; - } - - ret = create_file("flash", S_IFREG|S_IWUSR|S_IRUGO, dir, &tmp, - &flash_ops, dd); - if (ret) { - printk(KERN_ERR "create_file(%s/flash) " - "failed: %d\n", unit, ret); - goto bail; - } - -bail: - return ret; -} - -static int remove_file(struct dentry *parent, char *name) -{ - struct dentry *tmp; - int ret; - - tmp = lookup_one_len(name, parent, strlen(name)); - - if (IS_ERR(tmp)) { - ret = PTR_ERR(tmp); - goto bail; - } - - spin_lock(&tmp->d_lock); - if (!d_unhashed(tmp) && d_really_is_positive(tmp)) { - dget_dlock(tmp); - __d_drop(tmp); - spin_unlock(&tmp->d_lock); - simple_unlink(d_inode(parent), tmp); - } else - spin_unlock(&tmp->d_lock); - - ret = 0; -bail: - /* - * We don't expect clients to care about the return value, but - * it's there if they need it. - */ - return ret; -} - -static int remove_device_files(struct super_block *sb, - struct ipath_devdata *dd) -{ - struct dentry *dir, *root; - char unit[10]; - int ret; - - root = dget(sb->s_root); - mutex_lock(&d_inode(root)->i_mutex); - snprintf(unit, sizeof unit, "%02d", dd->ipath_unit); - dir = lookup_one_len(unit, root, strlen(unit)); - - if (IS_ERR(dir)) { - ret = PTR_ERR(dir); - printk(KERN_ERR "Lookup of %s failed\n", unit); - goto bail; - } - - remove_file(dir, "flash"); - remove_file(dir, "atomic_counters"); - d_delete(dir); - ret = simple_rmdir(d_inode(root), dir); - -bail: - mutex_unlock(&d_inode(root)->i_mutex); - dput(root); - return ret; -} - -static int ipathfs_fill_super(struct super_block *sb, void *data, - int silent) -{ - struct ipath_devdata *dd, *tmp; - unsigned long flags; - int ret; - - static struct tree_descr files[] = { - [2] = {"atomic_stats", &atomic_stats_ops, S_IRUGO}, - {""}, - }; - - ret = simple_fill_super(sb, IPATHFS_MAGIC, files); - if (ret) { - printk(KERN_ERR "simple_fill_super failed: %d\n", ret); - goto bail; - } - - spin_lock_irqsave(&ipath_devs_lock, flags); - - list_for_each_entry_safe(dd, tmp, &ipath_dev_list, ipath_list) { - spin_unlock_irqrestore(&ipath_devs_lock, flags); - ret = create_device_files(sb, dd); - if (ret) - goto bail; - spin_lock_irqsave(&ipath_devs_lock, flags); - } - - spin_unlock_irqrestore(&ipath_devs_lock, flags); - -bail: - return ret; -} - -static struct dentry *ipathfs_mount(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data) -{ - struct dentry *ret; - ret = mount_single(fs_type, flags, data, ipathfs_fill_super); - if (!IS_ERR(ret)) - ipath_super = ret->d_sb; - return ret; -} - -static void ipathfs_kill_super(struct super_block *s) -{ - kill_litter_super(s); - ipath_super = NULL; -} - -int ipathfs_add_device(struct ipath_devdata *dd) -{ - int ret; - - if (ipath_super == NULL) { - ret = 0; - goto bail; - } - - ret = create_device_files(ipath_super, dd); - -bail: - return ret; -} - -int ipathfs_remove_device(struct ipath_devdata *dd) -{ - int ret; - - if (ipath_super == NULL) { - ret = 0; - goto bail; - } - - ret = remove_device_files(ipath_super, dd); - -bail: - return ret; -} - -static struct file_system_type ipathfs_fs_type = { - .owner = THIS_MODULE, - .name = "ipathfs", - .mount = ipathfs_mount, - .kill_sb = ipathfs_kill_super, -}; -MODULE_ALIAS_FS("ipathfs"); - -int __init ipath_init_ipathfs(void) -{ - return register_filesystem(&ipathfs_fs_type); -} - -void __exit ipath_exit_ipathfs(void) -{ - unregister_filesystem(&ipathfs_fs_type); -} |