]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
uml: move hppfs_kern.c to hppfs.c
authorJeff Dike <jdike@addtoit.com>
Mon, 12 May 2008 21:01:50 +0000 (14:01 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 13 May 2008 15:02:21 +0000 (08:02 -0700)
There's no reason for the _kern in hppfs_kern.c, so move it to hppfs.c.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/hppfs/Makefile
fs/hppfs/hppfs.c [new file with mode: 0644]
fs/hppfs/hppfs_kern.c [deleted file]

index 6890433f7595c7514c0dd9ee8fb5cbc1ba103b11..8a1f50344368a9e1c1a3efab4120effd5d7e70da 100644 (file)
@@ -1,9 +1,9 @@
 #
-# Copyright (C) 2002, 2003 Jeff Dike (jdike@karaya.com)
+# Copyright (C) 2002 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 # Licensed under the GPL
 #
 
-hppfs-objs := hppfs_kern.o
+hppfs-objs := hppfs.o
 
 obj-y =
-obj-$(CONFIG_HPPFS) += hppfs.o
+obj-$(CONFIG_HPPFS) += $(hppfs-objs)
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
new file mode 100644 (file)
index 0000000..65077aa
--- /dev/null
@@ -0,0 +1,771 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/ctype.h>
+#include <linux/dcache.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mount.h>
+#include <linux/slab.h>
+#include <linux/statfs.h>
+#include <linux/types.h>
+#include <asm/uaccess.h>
+#include "os.h"
+
+static struct inode *get_inode(struct super_block *, struct dentry *);
+
+struct hppfs_data {
+       struct list_head list;
+       char contents[PAGE_SIZE - sizeof(struct list_head)];
+};
+
+struct hppfs_private {
+       struct file *proc_file;
+       int host_fd;
+       loff_t len;
+       struct hppfs_data *contents;
+};
+
+struct hppfs_inode_info {
+       struct dentry *proc_dentry;
+       struct inode vfs_inode;
+};
+
+static inline struct hppfs_inode_info *HPPFS_I(struct inode *inode)
+{
+       return container_of(inode, struct hppfs_inode_info, vfs_inode);
+}
+
+#define HPPFS_SUPER_MAGIC 0xb00000ee
+
+static const struct super_operations hppfs_sbops;
+
+static int is_pid(struct dentry *dentry)
+{
+       struct super_block *sb;
+       int i;
+
+       sb = dentry->d_sb;
+       if (dentry->d_parent != sb->s_root)
+               return 0;
+
+       for (i = 0; i < dentry->d_name.len; i++) {
+               if (!isdigit(dentry->d_name.name[i]))
+                       return 0;
+       }
+       return 1;
+}
+
+static char *dentry_name(struct dentry *dentry, int extra)
+{
+       struct dentry *parent;
+       char *root, *name;
+       const char *seg_name;
+       int len, seg_len;
+
+       len = 0;
+       parent = dentry;
+       while (parent->d_parent != parent) {
+               if (is_pid(parent))
+                       len += strlen("pid") + 1;
+               else len += parent->d_name.len + 1;
+               parent = parent->d_parent;
+       }
+
+       root = "proc";
+       len += strlen(root);
+       name = kmalloc(len + extra + 1, GFP_KERNEL);
+       if (name == NULL)
+               return NULL;
+
+       name[len] = '\0';
+       parent = dentry;
+       while (parent->d_parent != parent) {
+               if (is_pid(parent)) {
+                       seg_name = "pid";
+                       seg_len = strlen("pid");
+               }
+               else {
+                       seg_name = parent->d_name.name;
+                       seg_len = parent->d_name.len;
+               }
+
+               len -= seg_len + 1;
+               name[len] = '/';
+               strncpy(&name[len + 1], seg_name, seg_len);
+               parent = parent->d_parent;
+       }
+       strncpy(name, root, strlen(root));
+       return name;
+}
+
+static int file_removed(struct dentry *dentry, const char *file)
+{
+       char *host_file;
+       int extra, fd;
+
+       extra = 0;
+       if (file != NULL)
+               extra += strlen(file) + 1;
+
+       host_file = dentry_name(dentry, extra + strlen("/remove"));
+       if (host_file == NULL) {
+               printk(KERN_ERR "file_removed : allocation failed\n");
+               return -ENOMEM;
+       }
+
+       if (file != NULL) {
+               strcat(host_file, "/");
+               strcat(host_file, file);
+       }
+       strcat(host_file, "/remove");
+
+       fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
+       kfree(host_file);
+       if (fd > 0) {
+               os_close_file(fd);
+               return 1;
+       }
+       return 0;
+}
+
+static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
+                                  struct nameidata *nd)
+{
+       struct dentry *proc_dentry, *new, *parent;
+       struct inode *inode;
+       int err, deleted;
+
+       deleted = file_removed(dentry, NULL);
+       if (deleted < 0)
+               return ERR_PTR(deleted);
+       else if (deleted)
+               return ERR_PTR(-ENOENT);
+
+       err = -ENOMEM;
+       parent = HPPFS_I(ino)->proc_dentry;
+       mutex_lock(&parent->d_inode->i_mutex);
+       proc_dentry = d_lookup(parent, &dentry->d_name);
+       if (proc_dentry == NULL) {
+               proc_dentry = d_alloc(parent, &dentry->d_name);
+               if (proc_dentry == NULL) {
+                       mutex_unlock(&parent->d_inode->i_mutex);
+                       goto out;
+               }
+               new = (*parent->d_inode->i_op->lookup)(parent->d_inode,
+                                                      proc_dentry, NULL);
+               if (new) {
+                       dput(proc_dentry);
+                       proc_dentry = new;
+               }
+       }
+       mutex_unlock(&parent->d_inode->i_mutex);
+
+       if (IS_ERR(proc_dentry))
+               return proc_dentry;
+
+       err = -ENOMEM;
+       inode = get_inode(ino->i_sb, proc_dentry);
+       if (!inode)
+               goto out_dput;
+
+       d_add(dentry, inode);
+       return NULL;
+
+ out_dput:
+       dput(proc_dentry);
+ out:
+       return ERR_PTR(err);
+}
+
+static const struct inode_operations hppfs_file_iops = {
+};
+
+static ssize_t read_proc(struct file *file, char __user *buf, ssize_t count,
+                        loff_t *ppos, int is_user)
+{
+       ssize_t (*read)(struct file *, char __user *, size_t, loff_t *);
+       ssize_t n;
+
+       read = file->f_path.dentry->d_inode->i_fop->read;
+
+       if (!is_user)
+               set_fs(KERNEL_DS);
+
+       n = (*read)(file, buf, count, &file->f_pos);
+
+       if (!is_user)
+               set_fs(USER_DS);
+
+       if (ppos)
+               *ppos = file->f_pos;
+       return n;
+}
+
+static ssize_t hppfs_read_file(int fd, char __user *buf, ssize_t count)
+{
+       ssize_t n;
+       int cur, err;
+       char *new_buf;
+
+       n = -ENOMEM;
+       new_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+       if (new_buf == NULL) {
+               printk(KERN_ERR "hppfs_read_file : kmalloc failed\n");
+               goto out;
+       }
+       n = 0;
+       while (count > 0) {
+               cur = min_t(ssize_t, count, PAGE_SIZE);
+               err = os_read_file(fd, new_buf, cur);
+               if (err < 0) {
+                       printk(KERN_ERR "hppfs_read : read failed, "
+                              "errno = %d\n", err);
+                       n = err;
+                       goto out_free;
+               } else if (err == 0)
+                       break;
+
+               if (copy_to_user(buf, new_buf, err)) {
+                       n = -EFAULT;
+                       goto out_free;
+               }
+               n += err;
+               count -= err;
+       }
+ out_free:
+       kfree(new_buf);
+ out:
+       return n;
+}
+
+static ssize_t hppfs_read(struct file *file, char __user *buf, size_t count,
+                         loff_t *ppos)
+{
+       struct hppfs_private *hppfs = file->private_data;
+       struct hppfs_data *data;
+       loff_t off;
+       int err;
+
+       if (hppfs->contents != NULL) {
+               int rem;
+
+               if (*ppos >= hppfs->len)
+                       return 0;
+
+               data = hppfs->contents;
+               off = *ppos;
+               while (off >= sizeof(data->contents)) {
+                       data = list_entry(data->list.next, struct hppfs_data,
+                                         list);
+                       off -= sizeof(data->contents);
+               }
+
+               if (off + count > hppfs->len)
+                       count = hppfs->len - off;
+               rem = copy_to_user(buf, &data->contents[off], count);
+               *ppos += count - rem;
+               if (rem > 0)
+                       return -EFAULT;
+       } else if (hppfs->host_fd != -1) {
+               err = os_seek_file(hppfs->host_fd, *ppos);
+               if (err) {
+                       printk(KERN_ERR "hppfs_read : seek failed, "
+                              "errno = %d\n", err);
+                       return err;
+               }
+               count = hppfs_read_file(hppfs->host_fd, buf, count);
+               if (count > 0)
+                       *ppos += count;
+       }
+       else count = read_proc(hppfs->proc_file, buf, count, ppos, 1);
+
+       return count;
+}
+
+static ssize_t hppfs_write(struct file *file, const char __user *buf,
+                          size_t len, loff_t *ppos)
+{
+       struct hppfs_private *data = file->private_data;
+       struct file *proc_file = data->proc_file;
+       ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *);
+
+       write = proc_file->f_path.dentry->d_inode->i_fop->write;
+       return (*write)(proc_file, buf, len, ppos);
+}
+
+static int open_host_sock(char *host_file, int *filter_out)
+{
+       char *end;
+       int fd;
+
+       end = &host_file[strlen(host_file)];
+       strcpy(end, "/rw");
+       *filter_out = 1;
+       fd = os_connect_socket(host_file);
+       if (fd > 0)
+               return fd;
+
+       strcpy(end, "/r");
+       *filter_out = 0;
+       fd = os_connect_socket(host_file);
+       return fd;
+}
+
+static void free_contents(struct hppfs_data *head)
+{
+       struct hppfs_data *data;
+       struct list_head *ele, *next;
+
+       if (head == NULL)
+               return;
+
+       list_for_each_safe(ele, next, &head->list) {
+               data = list_entry(ele, struct hppfs_data, list);
+               kfree(data);
+       }
+       kfree(head);
+}
+
+static struct hppfs_data *hppfs_get_data(int fd, int filter,
+                                        struct file *proc_file,
+                                        struct file *hppfs_file,
+                                        loff_t *size_out)
+{
+       struct hppfs_data *data, *new, *head;
+       int n, err;
+
+       err = -ENOMEM;
+       data = kmalloc(sizeof(*data), GFP_KERNEL);
+       if (data == NULL) {
+               printk(KERN_ERR "hppfs_get_data : head allocation failed\n");
+               goto failed;
+       }
+
+       INIT_LIST_HEAD(&data->list);
+
+       head = data;
+       *size_out = 0;
+
+       if (filter) {
+               while ((n = read_proc(proc_file, data->contents,
+                                     sizeof(data->contents), NULL, 0)) > 0)
+                       os_write_file(fd, data->contents, n);
+               err = os_shutdown_socket(fd, 0, 1);
+               if (err) {
+                       printk(KERN_ERR "hppfs_get_data : failed to shut down "
+                              "socket\n");
+                       goto failed_free;
+               }
+       }
+       while (1) {
+               n = os_read_file(fd, data->contents, sizeof(data->contents));
+               if (n < 0) {
+                       err = n;
+                       printk(KERN_ERR "hppfs_get_data : read failed, "
+                              "errno = %d\n", err);
+                       goto failed_free;
+               } else if (n == 0)
+                       break;
+
+               *size_out += n;
+
+               if (n < sizeof(data->contents))
+                       break;
+
+               new = kmalloc(sizeof(*data), GFP_KERNEL);
+               if (new == 0) {
+                       printk(KERN_ERR "hppfs_get_data : data allocation "
+                              "failed\n");
+                       err = -ENOMEM;
+                       goto failed_free;
+               }
+
+               INIT_LIST_HEAD(&new->list);
+               list_add(&new->list, &data->list);
+               data = new;
+       }
+       return head;
+
+ failed_free:
+       free_contents(head);
+ failed:
+       return ERR_PTR(err);
+}
+
+static struct hppfs_private *hppfs_data(void)
+{
+       struct hppfs_private *data;
+
+       data = kmalloc(sizeof(*data), GFP_KERNEL);
+       if (data == NULL)
+               return data;
+
+       *data = ((struct hppfs_private ) { .host_fd             = -1,
+                                          .len                 = -1,
+                                          .contents            = NULL } );
+       return data;
+}
+
+static int file_mode(int fmode)
+{
+       if (fmode == (FMODE_READ | FMODE_WRITE))
+               return O_RDWR;
+       if (fmode == FMODE_READ)
+               return O_RDONLY;
+       if (fmode == FMODE_WRITE)
+               return O_WRONLY;
+       return 0;
+}
+
+static int hppfs_open(struct inode *inode, struct file *file)
+{
+       struct hppfs_private *data;
+       struct vfsmount *proc_mnt;
+       struct dentry *proc_dentry;
+       char *host_file;
+       int err, fd, type, filter;
+
+       err = -ENOMEM;
+       data = hppfs_data();
+       if (data == NULL)
+               goto out;
+
+       host_file = dentry_name(file->f_path.dentry, strlen("/rw"));
+       if (host_file == NULL)
+               goto out_free2;
+
+       proc_dentry = HPPFS_I(inode)->proc_dentry;
+       proc_mnt = inode->i_sb->s_fs_info;
+
+       /* XXX This isn't closed anywhere */
+       data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
+                                     file_mode(file->f_mode));
+       err = PTR_ERR(data->proc_file);
+       if (IS_ERR(data->proc_file))
+               goto out_free1;
+
+       type = os_file_type(host_file);
+       if (type == OS_TYPE_FILE) {
+               fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
+               if (fd >= 0)
+                       data->host_fd = fd;
+               else
+                       printk(KERN_ERR "hppfs_open : failed to open '%s', "
+                              "errno = %d\n", host_file, -fd);
+
+               data->contents = NULL;
+       } else if (type == OS_TYPE_DIR) {
+               fd = open_host_sock(host_file, &filter);
+               if (fd > 0) {
+                       data->contents = hppfs_get_data(fd, filter,
+                                                       data->proc_file,
+                                                       file, &data->len);
+                       if (!IS_ERR(data->contents))
+                               data->host_fd = fd;
+               } else
+                       printk(KERN_ERR "hppfs_open : failed to open a socket "
+                              "in '%s', errno = %d\n", host_file, -fd);
+       }
+       kfree(host_file);
+
+       file->private_data = data;
+       return 0;
+
+ out_free1:
+       kfree(host_file);
+ out_free2:
+       free_contents(data->contents);
+       kfree(data);
+ out:
+       return err;
+}
+
+static int hppfs_dir_open(struct inode *inode, struct file *file)
+{
+       struct hppfs_private *data;
+       struct vfsmount *proc_mnt;
+       struct dentry *proc_dentry;
+       int err;
+
+       err = -ENOMEM;
+       data = hppfs_data();
+       if (data == NULL)
+               goto out;
+
+       proc_dentry = HPPFS_I(inode)->proc_dentry;
+       proc_mnt = inode->i_sb->s_fs_info;
+       data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
+                                     file_mode(file->f_mode));
+       err = PTR_ERR(data->proc_file);
+       if (IS_ERR(data->proc_file))
+               goto out_free;
+
+       file->private_data = data;
+       return 0;
+
+ out_free:
+       kfree(data);
+ out:
+       return err;
+}
+
+static loff_t hppfs_llseek(struct file *file, loff_t off, int where)
+{
+       struct hppfs_private *data = file->private_data;
+       struct file *proc_file = data->proc_file;
+       loff_t (*llseek)(struct file *, loff_t, int);
+       loff_t ret;
+
+       llseek = proc_file->f_path.dentry->d_inode->i_fop->llseek;
+       if (llseek != NULL) {
+               ret = (*llseek)(proc_file, off, where);
+               if (ret < 0)
+                       return ret;
+       }
+
+       return default_llseek(file, off, where);
+}
+
+static const struct file_operations hppfs_file_fops = {
+       .owner          = NULL,
+       .llseek         = hppfs_llseek,
+       .read           = hppfs_read,
+       .write          = hppfs_write,
+       .open           = hppfs_open,
+};
+
+struct hppfs_dirent {
+       void *vfs_dirent;
+       filldir_t filldir;
+       struct dentry *dentry;
+};
+
+static int hppfs_filldir(void *d, const char *name, int size,
+                        loff_t offset, u64 inode, unsigned int type)
+{
+       struct hppfs_dirent *dirent = d;
+
+       if (file_removed(dirent->dentry, name))
+               return 0;
+
+       return (*dirent->filldir)(dirent->vfs_dirent, name, size, offset,
+                                 inode, type);
+}
+
+static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
+{
+       struct hppfs_private *data = file->private_data;
+       struct file *proc_file = data->proc_file;
+       int (*readdir)(struct file *, void *, filldir_t);
+       struct hppfs_dirent dirent = ((struct hppfs_dirent)
+                                     { .vfs_dirent     = ent,
+                                       .filldir        = filldir,
+                                       .dentry         = file->f_path.dentry
+                                     });
+       int err;
+
+       readdir = proc_file->f_path.dentry->d_inode->i_fop->readdir;
+
+       proc_file->f_pos = file->f_pos;
+       err = (*readdir)(proc_file, &dirent, hppfs_filldir);
+       file->f_pos = proc_file->f_pos;
+
+       return err;
+}
+
+static int hppfs_fsync(struct file *file, struct dentry *dentry, int datasync)
+{
+       return 0;
+}
+
+static const struct file_operations hppfs_dir_fops = {
+       .owner          = NULL,
+       .readdir        = hppfs_readdir,
+       .open           = hppfs_dir_open,
+       .fsync          = hppfs_fsync,
+};
+
+static int hppfs_statfs(struct dentry *dentry, struct kstatfs *sf)
+{
+       sf->f_blocks = 0;
+       sf->f_bfree = 0;
+       sf->f_bavail = 0;
+       sf->f_files = 0;
+       sf->f_ffree = 0;
+       sf->f_type = HPPFS_SUPER_MAGIC;
+       return 0;
+}
+
+static struct inode *hppfs_alloc_inode(struct super_block *sb)
+{
+       struct hppfs_inode_info *hi;
+
+       hi = kmalloc(sizeof(*hi), GFP_KERNEL);
+       if (!hi)
+               return NULL;
+
+       hi->proc_dentry = NULL;
+       inode_init_once(&hi->vfs_inode);
+       return &hi->vfs_inode;
+}
+
+void hppfs_delete_inode(struct inode *ino)
+{
+       dput(HPPFS_I(ino)->proc_dentry);
+       mntput(ino->i_sb->s_fs_info);
+
+       clear_inode(ino);
+}
+
+static void hppfs_destroy_inode(struct inode *inode)
+{
+       kfree(HPPFS_I(inode));
+}
+
+static const struct super_operations hppfs_sbops = {
+       .alloc_inode    = hppfs_alloc_inode,
+       .destroy_inode  = hppfs_destroy_inode,
+       .delete_inode   = hppfs_delete_inode,
+       .statfs         = hppfs_statfs,
+};
+
+static int hppfs_readlink(struct dentry *dentry, char __user *buffer,
+                         int buflen)
+{
+       struct dentry *proc_dentry;
+
+       proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
+       return proc_dentry->d_inode->i_op->readlink(proc_dentry, buffer,
+                                                   buflen);
+}
+
+static void *hppfs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+       struct dentry *proc_dentry;
+
+       proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
+
+       return proc_dentry->d_inode->i_op->follow_link(proc_dentry, nd);
+}
+
+int hppfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+       return generic_permission(inode, mask, NULL);
+}
+
+static const struct inode_operations hppfs_dir_iops = {
+       .lookup         = hppfs_lookup,
+       .permission     = hppfs_permission,
+};
+
+static const struct inode_operations hppfs_link_iops = {
+       .readlink       = hppfs_readlink,
+       .follow_link    = hppfs_follow_link,
+       .permission     = hppfs_permission,
+};
+
+static struct inode *get_inode(struct super_block *sb, struct dentry *dentry)
+{
+       struct inode *proc_ino = dentry->d_inode;
+       struct inode *inode = new_inode(sb);
+
+       if (!inode)
+               return ERR_PTR(-ENOMEM);
+
+       if (S_ISDIR(dentry->d_inode->i_mode)) {
+               inode->i_op = &hppfs_dir_iops;
+               inode->i_fop = &hppfs_dir_fops;
+       } else if (S_ISLNK(dentry->d_inode->i_mode)) {
+               inode->i_op = &hppfs_link_iops;
+               inode->i_fop = &hppfs_file_fops;
+       } else {
+               inode->i_op = &hppfs_file_iops;
+               inode->i_fop = &hppfs_file_fops;
+       }
+
+       HPPFS_I(inode)->proc_dentry = dget(dentry);
+
+       inode->i_uid = proc_ino->i_uid;
+       inode->i_gid = proc_ino->i_gid;
+       inode->i_atime = proc_ino->i_atime;
+       inode->i_mtime = proc_ino->i_mtime;
+       inode->i_ctime = proc_ino->i_ctime;
+       inode->i_ino = proc_ino->i_ino;
+       inode->i_mode = proc_ino->i_mode;
+       inode->i_nlink = proc_ino->i_nlink;
+       inode->i_size = proc_ino->i_size;
+       inode->i_blocks = proc_ino->i_blocks;
+
+       return inode;
+}
+
+static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
+{
+       struct inode *root_inode;
+       struct vfsmount *proc_mnt;
+       int err = -ENOENT;
+
+       proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
+       if (IS_ERR(proc_mnt))
+               goto out;
+
+       sb->s_blocksize = 1024;
+       sb->s_blocksize_bits = 10;
+       sb->s_magic = HPPFS_SUPER_MAGIC;
+       sb->s_op = &hppfs_sbops;
+       sb->s_fs_info = proc_mnt;
+
+       err = -ENOMEM;
+       root_inode = get_inode(sb, proc_mnt->mnt_sb->s_root);
+       if (!root_inode)
+               goto out_mntput;
+
+       sb->s_root = d_alloc_root(root_inode);
+       if (!sb->s_root)
+               goto out_iput;
+
+       return 0;
+
+ out_iput:
+       iput(root_inode);
+ out_mntput:
+       mntput(proc_mnt);
+ out:
+       return(err);
+}
+
+static int hppfs_read_super(struct file_system_type *type,
+                           int flags, const char *dev_name,
+                           void *data, struct vfsmount *mnt)
+{
+       return get_sb_nodev(type, flags, data, hppfs_fill_super, mnt);
+}
+
+static struct file_system_type hppfs_type = {
+       .owner          = THIS_MODULE,
+       .name           = "hppfs",
+       .get_sb         = hppfs_read_super,
+       .kill_sb        = kill_anon_super,
+       .fs_flags       = 0,
+};
+
+static int __init init_hppfs(void)
+{
+       return register_filesystem(&hppfs_type);
+}
+
+static void __exit exit_hppfs(void)
+{
+       unregister_filesystem(&hppfs_type);
+}
+
+module_init(init_hppfs)
+module_exit(exit_hppfs)
+MODULE_LICENSE("GPL");
diff --git a/fs/hppfs/hppfs_kern.c b/fs/hppfs/hppfs_kern.c
deleted file mode 100644 (file)
index 65077aa..0000000
+++ /dev/null
@@ -1,771 +0,0 @@
-/*
- * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <linux/ctype.h>
-#include <linux/dcache.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/mount.h>
-#include <linux/slab.h>
-#include <linux/statfs.h>
-#include <linux/types.h>
-#include <asm/uaccess.h>
-#include "os.h"
-
-static struct inode *get_inode(struct super_block *, struct dentry *);
-
-struct hppfs_data {
-       struct list_head list;
-       char contents[PAGE_SIZE - sizeof(struct list_head)];
-};
-
-struct hppfs_private {
-       struct file *proc_file;
-       int host_fd;
-       loff_t len;
-       struct hppfs_data *contents;
-};
-
-struct hppfs_inode_info {
-       struct dentry *proc_dentry;
-       struct inode vfs_inode;
-};
-
-static inline struct hppfs_inode_info *HPPFS_I(struct inode *inode)
-{
-       return container_of(inode, struct hppfs_inode_info, vfs_inode);
-}
-
-#define HPPFS_SUPER_MAGIC 0xb00000ee
-
-static const struct super_operations hppfs_sbops;
-
-static int is_pid(struct dentry *dentry)
-{
-       struct super_block *sb;
-       int i;
-
-       sb = dentry->d_sb;
-       if (dentry->d_parent != sb->s_root)
-               return 0;
-
-       for (i = 0; i < dentry->d_name.len; i++) {
-               if (!isdigit(dentry->d_name.name[i]))
-                       return 0;
-       }
-       return 1;
-}
-
-static char *dentry_name(struct dentry *dentry, int extra)
-{
-       struct dentry *parent;
-       char *root, *name;
-       const char *seg_name;
-       int len, seg_len;
-
-       len = 0;
-       parent = dentry;
-       while (parent->d_parent != parent) {
-               if (is_pid(parent))
-                       len += strlen("pid") + 1;
-               else len += parent->d_name.len + 1;
-               parent = parent->d_parent;
-       }
-
-       root = "proc";
-       len += strlen(root);
-       name = kmalloc(len + extra + 1, GFP_KERNEL);
-       if (name == NULL)
-               return NULL;
-
-       name[len] = '\0';
-       parent = dentry;
-       while (parent->d_parent != parent) {
-               if (is_pid(parent)) {
-                       seg_name = "pid";
-                       seg_len = strlen("pid");
-               }
-               else {
-                       seg_name = parent->d_name.name;
-                       seg_len = parent->d_name.len;
-               }
-
-               len -= seg_len + 1;
-               name[len] = '/';
-               strncpy(&name[len + 1], seg_name, seg_len);
-               parent = parent->d_parent;
-       }
-       strncpy(name, root, strlen(root));
-       return name;
-}
-
-static int file_removed(struct dentry *dentry, const char *file)
-{
-       char *host_file;
-       int extra, fd;
-
-       extra = 0;
-       if (file != NULL)
-               extra += strlen(file) + 1;
-
-       host_file = dentry_name(dentry, extra + strlen("/remove"));
-       if (host_file == NULL) {
-               printk(KERN_ERR "file_removed : allocation failed\n");
-               return -ENOMEM;
-       }
-
-       if (file != NULL) {
-               strcat(host_file, "/");
-               strcat(host_file, file);
-       }
-       strcat(host_file, "/remove");
-
-       fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
-       kfree(host_file);
-       if (fd > 0) {
-               os_close_file(fd);
-               return 1;
-       }
-       return 0;
-}
-
-static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
-                                  struct nameidata *nd)
-{
-       struct dentry *proc_dentry, *new, *parent;
-       struct inode *inode;
-       int err, deleted;
-
-       deleted = file_removed(dentry, NULL);
-       if (deleted < 0)
-               return ERR_PTR(deleted);
-       else if (deleted)
-               return ERR_PTR(-ENOENT);
-
-       err = -ENOMEM;
-       parent = HPPFS_I(ino)->proc_dentry;
-       mutex_lock(&parent->d_inode->i_mutex);
-       proc_dentry = d_lookup(parent, &dentry->d_name);
-       if (proc_dentry == NULL) {
-               proc_dentry = d_alloc(parent, &dentry->d_name);
-               if (proc_dentry == NULL) {
-                       mutex_unlock(&parent->d_inode->i_mutex);
-                       goto out;
-               }
-               new = (*parent->d_inode->i_op->lookup)(parent->d_inode,
-                                                      proc_dentry, NULL);
-               if (new) {
-                       dput(proc_dentry);
-                       proc_dentry = new;
-               }
-       }
-       mutex_unlock(&parent->d_inode->i_mutex);
-
-       if (IS_ERR(proc_dentry))
-               return proc_dentry;
-
-       err = -ENOMEM;
-       inode = get_inode(ino->i_sb, proc_dentry);
-       if (!inode)
-               goto out_dput;
-
-       d_add(dentry, inode);
-       return NULL;
-
- out_dput:
-       dput(proc_dentry);
- out:
-       return ERR_PTR(err);
-}
-
-static const struct inode_operations hppfs_file_iops = {
-};
-
-static ssize_t read_proc(struct file *file, char __user *buf, ssize_t count,
-                        loff_t *ppos, int is_user)
-{
-       ssize_t (*read)(struct file *, char __user *, size_t, loff_t *);
-       ssize_t n;
-
-       read = file->f_path.dentry->d_inode->i_fop->read;
-
-       if (!is_user)
-               set_fs(KERNEL_DS);
-
-       n = (*read)(file, buf, count, &file->f_pos);
-
-       if (!is_user)
-               set_fs(USER_DS);
-
-       if (ppos)
-               *ppos = file->f_pos;
-       return n;
-}
-
-static ssize_t hppfs_read_file(int fd, char __user *buf, ssize_t count)
-{
-       ssize_t n;
-       int cur, err;
-       char *new_buf;
-
-       n = -ENOMEM;
-       new_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
-       if (new_buf == NULL) {
-               printk(KERN_ERR "hppfs_read_file : kmalloc failed\n");
-               goto out;
-       }
-       n = 0;
-       while (count > 0) {
-               cur = min_t(ssize_t, count, PAGE_SIZE);
-               err = os_read_file(fd, new_buf, cur);
-               if (err < 0) {
-                       printk(KERN_ERR "hppfs_read : read failed, "
-                              "errno = %d\n", err);
-                       n = err;
-                       goto out_free;
-               } else if (err == 0)
-                       break;
-
-               if (copy_to_user(buf, new_buf, err)) {
-                       n = -EFAULT;
-                       goto out_free;
-               }
-               n += err;
-               count -= err;
-       }
- out_free:
-       kfree(new_buf);
- out:
-       return n;
-}
-
-static ssize_t hppfs_read(struct file *file, char __user *buf, size_t count,
-                         loff_t *ppos)
-{
-       struct hppfs_private *hppfs = file->private_data;
-       struct hppfs_data *data;
-       loff_t off;
-       int err;
-
-       if (hppfs->contents != NULL) {
-               int rem;
-
-               if (*ppos >= hppfs->len)
-                       return 0;
-
-               data = hppfs->contents;
-               off = *ppos;
-               while (off >= sizeof(data->contents)) {
-                       data = list_entry(data->list.next, struct hppfs_data,
-                                         list);
-                       off -= sizeof(data->contents);
-               }
-
-               if (off + count > hppfs->len)
-                       count = hppfs->len - off;
-               rem = copy_to_user(buf, &data->contents[off], count);
-               *ppos += count - rem;
-               if (rem > 0)
-                       return -EFAULT;
-       } else if (hppfs->host_fd != -1) {
-               err = os_seek_file(hppfs->host_fd, *ppos);
-               if (err) {
-                       printk(KERN_ERR "hppfs_read : seek failed, "
-                              "errno = %d\n", err);
-                       return err;
-               }
-               count = hppfs_read_file(hppfs->host_fd, buf, count);
-               if (count > 0)
-                       *ppos += count;
-       }
-       else count = read_proc(hppfs->proc_file, buf, count, ppos, 1);
-
-       return count;
-}
-
-static ssize_t hppfs_write(struct file *file, const char __user *buf,
-                          size_t len, loff_t *ppos)
-{
-       struct hppfs_private *data = file->private_data;
-       struct file *proc_file = data->proc_file;
-       ssize_t (*write)(struct file *, const char __user *, size_t, loff_t *);
-
-       write = proc_file->f_path.dentry->d_inode->i_fop->write;
-       return (*write)(proc_file, buf, len, ppos);
-}
-
-static int open_host_sock(char *host_file, int *filter_out)
-{
-       char *end;
-       int fd;
-
-       end = &host_file[strlen(host_file)];
-       strcpy(end, "/rw");
-       *filter_out = 1;
-       fd = os_connect_socket(host_file);
-       if (fd > 0)
-               return fd;
-
-       strcpy(end, "/r");
-       *filter_out = 0;
-       fd = os_connect_socket(host_file);
-       return fd;
-}
-
-static void free_contents(struct hppfs_data *head)
-{
-       struct hppfs_data *data;
-       struct list_head *ele, *next;
-
-       if (head == NULL)
-               return;
-
-       list_for_each_safe(ele, next, &head->list) {
-               data = list_entry(ele, struct hppfs_data, list);
-               kfree(data);
-       }
-       kfree(head);
-}
-
-static struct hppfs_data *hppfs_get_data(int fd, int filter,
-                                        struct file *proc_file,
-                                        struct file *hppfs_file,
-                                        loff_t *size_out)
-{
-       struct hppfs_data *data, *new, *head;
-       int n, err;
-
-       err = -ENOMEM;
-       data = kmalloc(sizeof(*data), GFP_KERNEL);
-       if (data == NULL) {
-               printk(KERN_ERR "hppfs_get_data : head allocation failed\n");
-               goto failed;
-       }
-
-       INIT_LIST_HEAD(&data->list);
-
-       head = data;
-       *size_out = 0;
-
-       if (filter) {
-               while ((n = read_proc(proc_file, data->contents,
-                                     sizeof(data->contents), NULL, 0)) > 0)
-                       os_write_file(fd, data->contents, n);
-               err = os_shutdown_socket(fd, 0, 1);
-               if (err) {
-                       printk(KERN_ERR "hppfs_get_data : failed to shut down "
-                              "socket\n");
-                       goto failed_free;
-               }
-       }
-       while (1) {
-               n = os_read_file(fd, data->contents, sizeof(data->contents));
-               if (n < 0) {
-                       err = n;
-                       printk(KERN_ERR "hppfs_get_data : read failed, "
-                              "errno = %d\n", err);
-                       goto failed_free;
-               } else if (n == 0)
-                       break;
-
-               *size_out += n;
-
-               if (n < sizeof(data->contents))
-                       break;
-
-               new = kmalloc(sizeof(*data), GFP_KERNEL);
-               if (new == 0) {
-                       printk(KERN_ERR "hppfs_get_data : data allocation "
-                              "failed\n");
-                       err = -ENOMEM;
-                       goto failed_free;
-               }
-
-               INIT_LIST_HEAD(&new->list);
-               list_add(&new->list, &data->list);
-               data = new;
-       }
-       return head;
-
- failed_free:
-       free_contents(head);
- failed:
-       return ERR_PTR(err);
-}
-
-static struct hppfs_private *hppfs_data(void)
-{
-       struct hppfs_private *data;
-
-       data = kmalloc(sizeof(*data), GFP_KERNEL);
-       if (data == NULL)
-               return data;
-
-       *data = ((struct hppfs_private ) { .host_fd             = -1,
-                                          .len                 = -1,
-                                          .contents            = NULL } );
-       return data;
-}
-
-static int file_mode(int fmode)
-{
-       if (fmode == (FMODE_READ | FMODE_WRITE))
-               return O_RDWR;
-       if (fmode == FMODE_READ)
-               return O_RDONLY;
-       if (fmode == FMODE_WRITE)
-               return O_WRONLY;
-       return 0;
-}
-
-static int hppfs_open(struct inode *inode, struct file *file)
-{
-       struct hppfs_private *data;
-       struct vfsmount *proc_mnt;
-       struct dentry *proc_dentry;
-       char *host_file;
-       int err, fd, type, filter;
-
-       err = -ENOMEM;
-       data = hppfs_data();
-       if (data == NULL)
-               goto out;
-
-       host_file = dentry_name(file->f_path.dentry, strlen("/rw"));
-       if (host_file == NULL)
-               goto out_free2;
-
-       proc_dentry = HPPFS_I(inode)->proc_dentry;
-       proc_mnt = inode->i_sb->s_fs_info;
-
-       /* XXX This isn't closed anywhere */
-       data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
-                                     file_mode(file->f_mode));
-       err = PTR_ERR(data->proc_file);
-       if (IS_ERR(data->proc_file))
-               goto out_free1;
-
-       type = os_file_type(host_file);
-       if (type == OS_TYPE_FILE) {
-               fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
-               if (fd >= 0)
-                       data->host_fd = fd;
-               else
-                       printk(KERN_ERR "hppfs_open : failed to open '%s', "
-                              "errno = %d\n", host_file, -fd);
-
-               data->contents = NULL;
-       } else if (type == OS_TYPE_DIR) {
-               fd = open_host_sock(host_file, &filter);
-               if (fd > 0) {
-                       data->contents = hppfs_get_data(fd, filter,
-                                                       data->proc_file,
-                                                       file, &data->len);
-                       if (!IS_ERR(data->contents))
-                               data->host_fd = fd;
-               } else
-                       printk(KERN_ERR "hppfs_open : failed to open a socket "
-                              "in '%s', errno = %d\n", host_file, -fd);
-       }
-       kfree(host_file);
-
-       file->private_data = data;
-       return 0;
-
- out_free1:
-       kfree(host_file);
- out_free2:
-       free_contents(data->contents);
-       kfree(data);
- out:
-       return err;
-}
-
-static int hppfs_dir_open(struct inode *inode, struct file *file)
-{
-       struct hppfs_private *data;
-       struct vfsmount *proc_mnt;
-       struct dentry *proc_dentry;
-       int err;
-
-       err = -ENOMEM;
-       data = hppfs_data();
-       if (data == NULL)
-               goto out;
-
-       proc_dentry = HPPFS_I(inode)->proc_dentry;
-       proc_mnt = inode->i_sb->s_fs_info;
-       data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
-                                     file_mode(file->f_mode));
-       err = PTR_ERR(data->proc_file);
-       if (IS_ERR(data->proc_file))
-               goto out_free;
-
-       file->private_data = data;
-       return 0;
-
- out_free:
-       kfree(data);
- out:
-       return err;
-}
-
-static loff_t hppfs_llseek(struct file *file, loff_t off, int where)
-{
-       struct hppfs_private *data = file->private_data;
-       struct file *proc_file = data->proc_file;
-       loff_t (*llseek)(struct file *, loff_t, int);
-       loff_t ret;
-
-       llseek = proc_file->f_path.dentry->d_inode->i_fop->llseek;
-       if (llseek != NULL) {
-               ret = (*llseek)(proc_file, off, where);
-               if (ret < 0)
-                       return ret;
-       }
-
-       return default_llseek(file, off, where);
-}
-
-static const struct file_operations hppfs_file_fops = {
-       .owner          = NULL,
-       .llseek         = hppfs_llseek,
-       .read           = hppfs_read,
-       .write          = hppfs_write,
-       .open           = hppfs_open,
-};
-
-struct hppfs_dirent {
-       void *vfs_dirent;
-       filldir_t filldir;
-       struct dentry *dentry;
-};
-
-static int hppfs_filldir(void *d, const char *name, int size,
-                        loff_t offset, u64 inode, unsigned int type)
-{
-       struct hppfs_dirent *dirent = d;
-
-       if (file_removed(dirent->dentry, name))
-               return 0;
-
-       return (*dirent->filldir)(dirent->vfs_dirent, name, size, offset,
-                                 inode, type);
-}
-
-static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
-{
-       struct hppfs_private *data = file->private_data;
-       struct file *proc_file = data->proc_file;
-       int (*readdir)(struct file *, void *, filldir_t);
-       struct hppfs_dirent dirent = ((struct hppfs_dirent)
-                                     { .vfs_dirent     = ent,
-                                       .filldir        = filldir,
-                                       .dentry         = file->f_path.dentry
-                                     });
-       int err;
-
-       readdir = proc_file->f_path.dentry->d_inode->i_fop->readdir;
-
-       proc_file->f_pos = file->f_pos;
-       err = (*readdir)(proc_file, &dirent, hppfs_filldir);
-       file->f_pos = proc_file->f_pos;
-
-       return err;
-}
-
-static int hppfs_fsync(struct file *file, struct dentry *dentry, int datasync)
-{
-       return 0;
-}
-
-static const struct file_operations hppfs_dir_fops = {
-       .owner          = NULL,
-       .readdir        = hppfs_readdir,
-       .open           = hppfs_dir_open,
-       .fsync          = hppfs_fsync,
-};
-
-static int hppfs_statfs(struct dentry *dentry, struct kstatfs *sf)
-{
-       sf->f_blocks = 0;
-       sf->f_bfree = 0;
-       sf->f_bavail = 0;
-       sf->f_files = 0;
-       sf->f_ffree = 0;
-       sf->f_type = HPPFS_SUPER_MAGIC;
-       return 0;
-}
-
-static struct inode *hppfs_alloc_inode(struct super_block *sb)
-{
-       struct hppfs_inode_info *hi;
-
-       hi = kmalloc(sizeof(*hi), GFP_KERNEL);
-       if (!hi)
-               return NULL;
-
-       hi->proc_dentry = NULL;
-       inode_init_once(&hi->vfs_inode);
-       return &hi->vfs_inode;
-}
-
-void hppfs_delete_inode(struct inode *ino)
-{
-       dput(HPPFS_I(ino)->proc_dentry);
-       mntput(ino->i_sb->s_fs_info);
-
-       clear_inode(ino);
-}
-
-static void hppfs_destroy_inode(struct inode *inode)
-{
-       kfree(HPPFS_I(inode));
-}
-
-static const struct super_operations hppfs_sbops = {
-       .alloc_inode    = hppfs_alloc_inode,
-       .destroy_inode  = hppfs_destroy_inode,
-       .delete_inode   = hppfs_delete_inode,
-       .statfs         = hppfs_statfs,
-};
-
-static int hppfs_readlink(struct dentry *dentry, char __user *buffer,
-                         int buflen)
-{
-       struct dentry *proc_dentry;
-
-       proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
-       return proc_dentry->d_inode->i_op->readlink(proc_dentry, buffer,
-                                                   buflen);
-}
-
-static void *hppfs_follow_link(struct dentry *dentry, struct nameidata *nd)
-{
-       struct dentry *proc_dentry;
-
-       proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
-
-       return proc_dentry->d_inode->i_op->follow_link(proc_dentry, nd);
-}
-
-int hppfs_permission(struct inode *inode, int mask, struct nameidata *nd)
-{
-       return generic_permission(inode, mask, NULL);
-}
-
-static const struct inode_operations hppfs_dir_iops = {
-       .lookup         = hppfs_lookup,
-       .permission     = hppfs_permission,
-};
-
-static const struct inode_operations hppfs_link_iops = {
-       .readlink       = hppfs_readlink,
-       .follow_link    = hppfs_follow_link,
-       .permission     = hppfs_permission,
-};
-
-static struct inode *get_inode(struct super_block *sb, struct dentry *dentry)
-{
-       struct inode *proc_ino = dentry->d_inode;
-       struct inode *inode = new_inode(sb);
-
-       if (!inode)
-               return ERR_PTR(-ENOMEM);
-
-       if (S_ISDIR(dentry->d_inode->i_mode)) {
-               inode->i_op = &hppfs_dir_iops;
-               inode->i_fop = &hppfs_dir_fops;
-       } else if (S_ISLNK(dentry->d_inode->i_mode)) {
-               inode->i_op = &hppfs_link_iops;
-               inode->i_fop = &hppfs_file_fops;
-       } else {
-               inode->i_op = &hppfs_file_iops;
-               inode->i_fop = &hppfs_file_fops;
-       }
-
-       HPPFS_I(inode)->proc_dentry = dget(dentry);
-
-       inode->i_uid = proc_ino->i_uid;
-       inode->i_gid = proc_ino->i_gid;
-       inode->i_atime = proc_ino->i_atime;
-       inode->i_mtime = proc_ino->i_mtime;
-       inode->i_ctime = proc_ino->i_ctime;
-       inode->i_ino = proc_ino->i_ino;
-       inode->i_mode = proc_ino->i_mode;
-       inode->i_nlink = proc_ino->i_nlink;
-       inode->i_size = proc_ino->i_size;
-       inode->i_blocks = proc_ino->i_blocks;
-
-       return inode;
-}
-
-static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
-{
-       struct inode *root_inode;
-       struct vfsmount *proc_mnt;
-       int err = -ENOENT;
-
-       proc_mnt = do_kern_mount("proc", 0, "proc", NULL);
-       if (IS_ERR(proc_mnt))
-               goto out;
-
-       sb->s_blocksize = 1024;
-       sb->s_blocksize_bits = 10;
-       sb->s_magic = HPPFS_SUPER_MAGIC;
-       sb->s_op = &hppfs_sbops;
-       sb->s_fs_info = proc_mnt;
-
-       err = -ENOMEM;
-       root_inode = get_inode(sb, proc_mnt->mnt_sb->s_root);
-       if (!root_inode)
-               goto out_mntput;
-
-       sb->s_root = d_alloc_root(root_inode);
-       if (!sb->s_root)
-               goto out_iput;
-
-       return 0;
-
- out_iput:
-       iput(root_inode);
- out_mntput:
-       mntput(proc_mnt);
- out:
-       return(err);
-}
-
-static int hppfs_read_super(struct file_system_type *type,
-                           int flags, const char *dev_name,
-                           void *data, struct vfsmount *mnt)
-{
-       return get_sb_nodev(type, flags, data, hppfs_fill_super, mnt);
-}
-
-static struct file_system_type hppfs_type = {
-       .owner          = THIS_MODULE,
-       .name           = "hppfs",
-       .get_sb         = hppfs_read_super,
-       .kill_sb        = kill_anon_super,
-       .fs_flags       = 0,
-};
-
-static int __init init_hppfs(void)
-{
-       return register_filesystem(&hppfs_type);
-}
-
-static void __exit exit_hppfs(void)
-{
-       unregister_filesystem(&hppfs_type);
-}
-
-module_init(init_hppfs)
-module_exit(exit_hppfs)
-MODULE_LICENSE("GPL");