mirror of https://gitee.com/openkylin/linux.git
hppfs pass vfsmount to dentry_open()
Here's patch for hppfs that uses vfs_kern_mount to make sure it always has a procfs instance and passed the vfsmount on through the inode private data. Also fixes a procfs file_system_type leak for every attempted hppfs mount. [ jdike - gave this file a style workover, plus deleted hppfs_dentry_ops ] Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Dave Hansen
Al Viro
parent
8a4e98d9d7
commit
1dd0dd111f
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@ -1,23 +1,25 @@
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/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/kernel.h>
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#include <linux/ctype.h>
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#include <linux/dcache.h>
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/mount.h>
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#include <linux/slab.h>
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#include <linux/statfs.h>
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#include <linux/types.h>
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#include <asm/uaccess.h>
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#include <asm/fcntl.h>
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#include "os.h"
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static int init_inode(struct inode *inode, struct dentry *dentry);
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static int init_inode(struct inode *inode, struct dentry *dentry,
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struct vfsmount *mnt);
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struct hppfs_data {
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struct list_head list;
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@ -33,6 +35,7 @@ struct hppfs_private {
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struct hppfs_inode_info {
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struct dentry *proc_dentry;
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struct vfsmount *proc_mnt;
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struct inode vfs_inode;
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};
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@ -51,14 +54,14 @@ static int is_pid(struct dentry *dentry)
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int i;
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sb = dentry->d_sb;
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if((sb->s_op != &hppfs_sbops) || (dentry->d_parent != sb->s_root))
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return(0);
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if ((sb->s_op != &hppfs_sbops) || (dentry->d_parent != sb->s_root))
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return 0;
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for(i = 0; i < dentry->d_name.len; i++){
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if(!isdigit(dentry->d_name.name[i]))
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return(0);
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for (i = 0; i < dentry->d_name.len; i++) {
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if (!isdigit(dentry->d_name.name[i]))
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return 0;
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}
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return(1);
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return 1;
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}
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static char *dentry_name(struct dentry *dentry, int extra)
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@ -70,8 +73,8 @@ static char *dentry_name(struct dentry *dentry, int extra)
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len = 0;
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parent = dentry;
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while(parent->d_parent != parent){
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if(is_pid(parent))
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while (parent->d_parent != parent) {
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if (is_pid(parent))
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len += strlen("pid") + 1;
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else len += parent->d_name.len + 1;
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parent = parent->d_parent;
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@ -80,12 +83,13 @@ static char *dentry_name(struct dentry *dentry, int extra)
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root = "proc";
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len += strlen(root);
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name = kmalloc(len + extra + 1, GFP_KERNEL);
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if(name == NULL) return(NULL);
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if (name == NULL)
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return NULL;
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name[len] = '\0';
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parent = dentry;
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while(parent->d_parent != parent){
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if(is_pid(parent)){
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while (parent->d_parent != parent) {
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if (is_pid(parent)) {
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seg_name = "pid";
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seg_len = strlen("pid");
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}
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@ -100,27 +104,25 @@ static char *dentry_name(struct dentry *dentry, int extra)
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parent = parent->d_parent;
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}
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strncpy(name, root, strlen(root));
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return(name);
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return name;
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}
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struct dentry_operations hppfs_dentry_ops = {
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};
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static int file_removed(struct dentry *dentry, const char *file)
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{
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char *host_file;
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int extra, fd;
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extra = 0;
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if(file != NULL) extra += strlen(file) + 1;
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if (file != NULL)
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extra += strlen(file) + 1;
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host_file = dentry_name(dentry, extra + strlen("/remove"));
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if(host_file == NULL){
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printk("file_removed : allocation failed\n");
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return(-ENOMEM);
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if (host_file == NULL) {
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printk(KERN_ERR "file_removed : allocation failed\n");
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return -ENOMEM;
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}
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if(file != NULL){
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if (file != NULL) {
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strcat(host_file, "/");
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strcat(host_file, file);
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}
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@ -128,18 +130,18 @@ static int file_removed(struct dentry *dentry, const char *file)
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fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
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kfree(host_file);
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if(fd > 0){
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if (fd > 0) {
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os_close_file(fd);
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return(1);
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return 1;
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}
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return(0);
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return 0;
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}
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static void hppfs_read_inode(struct inode *ino)
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{
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struct inode *proc_ino;
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if(HPPFS_I(ino)->proc_dentry == NULL)
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if (HPPFS_I(ino)->proc_dentry == NULL)
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return;
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proc_ino = HPPFS_I(ino)->proc_dentry->d_inode;
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@ -177,32 +179,32 @@ static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
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int err, deleted;
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deleted = file_removed(dentry, NULL);
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if(deleted < 0)
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return(ERR_PTR(deleted));
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else if(deleted)
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return(ERR_PTR(-ENOENT));
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if (deleted < 0)
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return ERR_PTR(deleted);
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else if (deleted)
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return ERR_PTR(-ENOENT);
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err = -ENOMEM;
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parent = HPPFS_I(ino)->proc_dentry;
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mutex_lock(&parent->d_inode->i_mutex);
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proc_dentry = d_lookup(parent, &dentry->d_name);
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if(proc_dentry == NULL){
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if (proc_dentry == NULL) {
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proc_dentry = d_alloc(parent, &dentry->d_name);
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if(proc_dentry == NULL){
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if (proc_dentry == NULL) {
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mutex_unlock(&parent->d_inode->i_mutex);
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goto out;
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}
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new = (*parent->d_inode->i_op->lookup)(parent->d_inode,
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proc_dentry, NULL);
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if(new){
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if (new) {
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dput(proc_dentry);
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proc_dentry = new;
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}
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}
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mutex_unlock(&parent->d_inode->i_mutex);
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if(IS_ERR(proc_dentry))
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return(proc_dentry);
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if (IS_ERR(proc_dentry))
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return proc_dentry;
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inode = hppfs_iget(ino->i_sb);
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if (IS_ERR(inode)) {
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@ -210,22 +212,21 @@ static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
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goto out_dput;
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}
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err = init_inode(inode, proc_dentry);
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if(err)
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err = init_inode(inode, proc_dentry, HPPFS_I(ino)->proc_mnt);
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if (err)
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goto out_put;
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hppfs_read_inode(inode);
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d_add(dentry, inode);
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dentry->d_op = &hppfs_dentry_ops;
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return(NULL);
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return NULL;
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out_put:
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iput(inode);
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out_dput:
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dput(proc_dentry);
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out:
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return(ERR_PTR(err));
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return ERR_PTR(err);
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}
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static const struct inode_operations hppfs_file_iops = {
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@ -239,15 +240,16 @@ static ssize_t read_proc(struct file *file, char __user *buf, ssize_t count,
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read = file->f_path.dentry->d_inode->i_fop->read;
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if(!is_user)
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if (!is_user)
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set_fs(KERNEL_DS);
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n = (*read)(file, buf, count, &file->f_pos);
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if(!is_user)
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if (!is_user)
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set_fs(USER_DS);
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if(ppos) *ppos = file->f_pos;
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if (ppos)
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*ppos = file->f_pos;
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return n;
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}
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@ -259,24 +261,23 @@ static ssize_t hppfs_read_file(int fd, char __user *buf, ssize_t count)
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n = -ENOMEM;
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new_buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
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if(new_buf == NULL){
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printk("hppfs_read_file : kmalloc failed\n");
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if (new_buf == NULL) {
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printk(KERN_ERR "hppfs_read_file : kmalloc failed\n");
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goto out;
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}
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n = 0;
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while(count > 0){
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while (count > 0) {
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cur = min_t(ssize_t, count, PAGE_SIZE);
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err = os_read_file(fd, new_buf, cur);
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if(err < 0){
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printk("hppfs_read : read failed, errno = %d\n",
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err);
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if (err < 0) {
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printk(KERN_ERR "hppfs_read : read failed, "
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"errno = %d\n", err);
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n = err;
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goto out_free;
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}
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else if(err == 0)
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} else if (err == 0)
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break;
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if(copy_to_user(buf, new_buf, err)){
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if (copy_to_user(buf, new_buf, err)) {
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n = -EFAULT;
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goto out_free;
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}
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@ -297,35 +298,36 @@ static ssize_t hppfs_read(struct file *file, char __user *buf, size_t count,
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loff_t off;
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int err;
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if(hppfs->contents != NULL){
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if(*ppos >= hppfs->len) return(0);
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if (hppfs->contents != NULL) {
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if (*ppos >= hppfs->len)
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return 0;
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data = hppfs->contents;
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off = *ppos;
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while(off >= sizeof(data->contents)){
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while (off >= sizeof(data->contents)) {
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data = list_entry(data->list.next, struct hppfs_data,
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list);
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off -= sizeof(data->contents);
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}
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if(off + count > hppfs->len)
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if (off + count > hppfs->len)
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count = hppfs->len - off;
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copy_to_user(buf, &data->contents[off], count);
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*ppos += count;
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}
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else if(hppfs->host_fd != -1){
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} else if (hppfs->host_fd != -1) {
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err = os_seek_file(hppfs->host_fd, *ppos);
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if(err){
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printk("hppfs_read : seek failed, errno = %d\n", err);
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return(err);
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if (err) {
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printk(KERN_ERR "hppfs_read : seek failed, "
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"errno = %d\n", err);
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return err;
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}
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count = hppfs_read_file(hppfs->host_fd, buf, count);
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if(count > 0)
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if (count > 0)
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*ppos += count;
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}
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else count = read_proc(hppfs->proc_file, buf, count, ppos, 1);
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return(count);
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return count;
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}
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static ssize_t hppfs_write(struct file *file, const char __user *buf, size_t len,
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@ -342,7 +344,7 @@ static ssize_t hppfs_write(struct file *file, const char __user *buf, size_t len
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err = (*write)(proc_file, buf, len, &proc_file->f_pos);
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file->f_pos = proc_file->f_pos;
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return(err);
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return err;
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}
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static int open_host_sock(char *host_file, int *filter_out)
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@ -354,13 +356,13 @@ static int open_host_sock(char *host_file, int *filter_out)
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strcpy(end, "/rw");
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*filter_out = 1;
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fd = os_connect_socket(host_file);
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if(fd > 0)
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return(fd);
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if (fd > 0)
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return fd;
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strcpy(end, "/r");
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*filter_out = 0;
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fd = os_connect_socket(host_file);
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return(fd);
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return fd;
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}
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static void free_contents(struct hppfs_data *head)
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@ -368,9 +370,10 @@ static void free_contents(struct hppfs_data *head)
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struct hppfs_data *data;
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struct list_head *ele, *next;
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if(head == NULL) return;
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if (head == NULL)
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return;
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list_for_each_safe(ele, next, &head->list){
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list_for_each_safe(ele, next, &head->list) {
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data = list_entry(ele, struct hppfs_data, list);
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kfree(data);
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}
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@ -387,8 +390,8 @@ static struct hppfs_data *hppfs_get_data(int fd, int filter,
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err = -ENOMEM;
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data = kmalloc(sizeof(*data), GFP_KERNEL);
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if(data == NULL){
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printk("hppfs_get_data : head allocation failed\n");
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if (data == NULL) {
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printk(KERN_ERR "hppfs_get_data : head allocation failed\n");
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goto failed;
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}
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@ -397,36 +400,36 @@ static struct hppfs_data *hppfs_get_data(int fd, int filter,
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head = data;
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*size_out = 0;
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if(filter){
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while((n = read_proc(proc_file, data->contents,
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if (filter) {
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while ((n = read_proc(proc_file, data->contents,
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sizeof(data->contents), NULL, 0)) > 0)
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os_write_file(fd, data->contents, n);
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err = os_shutdown_socket(fd, 0, 1);
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if(err){
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printk("hppfs_get_data : failed to shut down "
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if (err) {
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printk(KERN_ERR "hppfs_get_data : failed to shut down "
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"socket\n");
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goto failed_free;
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}
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}
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while(1){
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while (1) {
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n = os_read_file(fd, data->contents, sizeof(data->contents));
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if(n < 0){
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if (n < 0) {
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err = n;
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printk("hppfs_get_data : read failed, errno = %d\n",
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err);
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printk(KERN_ERR "hppfs_get_data : read failed, "
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"errno = %d\n", err);
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goto failed_free;
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}
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else if(n == 0)
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} else if (n == 0)
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break;
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*size_out += n;
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|
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if(n < sizeof(data->contents))
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if (n < sizeof(data->contents))
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break;
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new = kmalloc(sizeof(*data), GFP_KERNEL);
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if(new == 0){
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printk("hppfs_get_data : data allocation failed\n");
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if (new == 0) {
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printk(KERN_ERR "hppfs_get_data : data allocation "
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"failed\n");
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err = -ENOMEM;
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goto failed_free;
|
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}
|
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|
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@ -435,12 +438,12 @@ static struct hppfs_data *hppfs_get_data(int fd, int filter,
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list_add(&new->list, &data->list);
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data = new;
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}
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return(head);
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return head;
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failed_free:
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free_contents(head);
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failed:
|
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return(ERR_PTR(err));
|
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return ERR_PTR(err);
|
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}
|
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|
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static struct hppfs_private *hppfs_data(void)
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|
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@ -448,77 +451,79 @@ static struct hppfs_private *hppfs_data(void)
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struct hppfs_private *data;
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|
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data = kmalloc(sizeof(*data), GFP_KERNEL);
|
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if(data == NULL)
|
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return(data);
|
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if (data == NULL)
|
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return data;
|
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|
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*data = ((struct hppfs_private ) { .host_fd = -1,
|
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.len = -1,
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.contents = NULL } );
|
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return(data);
|
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return data;
|
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}
|
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|
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static int file_mode(int fmode)
|
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{
|
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if(fmode == (FMODE_READ | FMODE_WRITE))
|
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return(O_RDWR);
|
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if(fmode == FMODE_READ)
|
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return(O_RDONLY);
|
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if(fmode == FMODE_WRITE)
|
||||
return(O_WRONLY);
|
||||
return(0);
|
||||
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 dentry *proc_dentry;
|
||||
struct vfsmount *proc_mnt;
|
||||
char *host_file;
|
||||
int err, fd, type, filter;
|
||||
|
||||
err = -ENOMEM;
|
||||
data = hppfs_data();
|
||||
if(data == NULL)
|
||||
if (data == NULL)
|
||||
goto out;
|
||||
|
||||
host_file = dentry_name(file->f_path.dentry, strlen("/rw"));
|
||||
if(host_file == NULL)
|
||||
if (host_file == NULL)
|
||||
goto out_free2;
|
||||
|
||||
proc_dentry = HPPFS_I(inode)->proc_dentry;
|
||||
proc_mnt = HPPFS_I(inode)->proc_mnt;
|
||||
|
||||
/* XXX This isn't closed anywhere */
|
||||
data->proc_file = dentry_open(dget(proc_dentry), NULL,
|
||||
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))
|
||||
if (IS_ERR(data->proc_file))
|
||||
goto out_free1;
|
||||
|
||||
type = os_file_type(host_file);
|
||||
if(type == OS_TYPE_FILE){
|
||||
if (type == OS_TYPE_FILE) {
|
||||
fd = os_open_file(host_file, of_read(OPENFLAGS()), 0);
|
||||
if(fd >= 0)
|
||||
if (fd >= 0)
|
||||
data->host_fd = fd;
|
||||
else printk("hppfs_open : failed to open '%s', errno = %d\n",
|
||||
host_file, -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){
|
||||
} else if (type == OS_TYPE_DIR) {
|
||||
fd = open_host_sock(host_file, &filter);
|
||||
if(fd > 0){
|
||||
if (fd > 0) {
|
||||
data->contents = hppfs_get_data(fd, filter,
|
||||
data->proc_file,
|
||||
file, &data->len);
|
||||
if(!IS_ERR(data->contents))
|
||||
if (!IS_ERR(data->contents))
|
||||
data->host_fd = fd;
|
||||
}
|
||||
else printk("hppfs_open : failed to open a socket in "
|
||||
"'%s', errno = %d\n", host_file, -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);
|
||||
return 0;
|
||||
|
||||
out_free1:
|
||||
kfree(host_file);
|
||||
|
|
@ -526,34 +531,36 @@ static int hppfs_open(struct inode *inode, struct file *file)
|
|||
free_contents(data->contents);
|
||||
kfree(data);
|
||||
out:
|
||||
return(err);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int hppfs_dir_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct hppfs_private *data;
|
||||
struct dentry *proc_dentry;
|
||||
struct vfsmount *proc_mnt;
|
||||
int err;
|
||||
|
||||
err = -ENOMEM;
|
||||
data = hppfs_data();
|
||||
if(data == NULL)
|
||||
if (data == NULL)
|
||||
goto out;
|
||||
|
||||
proc_dentry = HPPFS_I(inode)->proc_dentry;
|
||||
data->proc_file = dentry_open(dget(proc_dentry), NULL,
|
||||
proc_mnt = HPPFS_I(inode)->proc_mnt;
|
||||
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))
|
||||
if (IS_ERR(data->proc_file))
|
||||
goto out_free;
|
||||
|
||||
file->private_data = data;
|
||||
return(0);
|
||||
return 0;
|
||||
|
||||
out_free:
|
||||
kfree(data);
|
||||
out:
|
||||
return(err);
|
||||
return err;
|
||||
}
|
||||
|
||||
static loff_t hppfs_llseek(struct file *file, loff_t off, int where)
|
||||
|
|
@ -564,13 +571,13 @@ static loff_t hppfs_llseek(struct file *file, loff_t off, int where)
|
|||
loff_t ret;
|
||||
|
||||
llseek = proc_file->f_path.dentry->d_inode->i_fop->llseek;
|
||||
if(llseek != NULL){
|
||||
if (llseek != NULL) {
|
||||
ret = (*llseek)(proc_file, off, where);
|
||||
if(ret < 0)
|
||||
return(ret);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
return(default_llseek(file, off, where));
|
||||
return default_llseek(file, off, where);
|
||||
}
|
||||
|
||||
static const struct file_operations hppfs_file_fops = {
|
||||
|
|
@ -592,11 +599,11 @@ static int hppfs_filldir(void *d, const char *name, int size,
|
|||
{
|
||||
struct hppfs_dirent *dirent = d;
|
||||
|
||||
if(file_removed(dirent->dentry, name))
|
||||
return(0);
|
||||
if (file_removed(dirent->dentry, name))
|
||||
return 0;
|
||||
|
||||
return((*dirent->filldir)(dirent->vfs_dirent, name, size, offset,
|
||||
inode, type));
|
||||
return (*dirent->filldir)(dirent->vfs_dirent, name, size, offset,
|
||||
inode, type);
|
||||
}
|
||||
|
||||
static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
|
||||
|
|
@ -607,7 +614,8 @@ static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
|
|||
struct hppfs_dirent dirent = ((struct hppfs_dirent)
|
||||
{ .vfs_dirent = ent,
|
||||
.filldir = filldir,
|
||||
.dentry = file->f_path.dentry } );
|
||||
.dentry = file->f_path.dentry
|
||||
});
|
||||
int err;
|
||||
|
||||
readdir = proc_file->f_path.dentry->d_inode->i_fop->readdir;
|
||||
|
|
@ -616,12 +624,12 @@ static int hppfs_readdir(struct file *file, void *ent, filldir_t filldir)
|
|||
err = (*readdir)(proc_file, &dirent, hppfs_filldir);
|
||||
file->f_pos = proc_file->f_pos;
|
||||
|
||||
return(err);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int hppfs_fsync(struct file *file, struct dentry *dentry, int datasync)
|
||||
{
|
||||
return(0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct file_operations hppfs_dir_fops = {
|
||||
|
|
@ -639,7 +647,7 @@ static int hppfs_statfs(struct dentry *dentry, struct kstatfs *sf)
|
|||
sf->f_files = 0;
|
||||
sf->f_ffree = 0;
|
||||
sf->f_type = HPPFS_SUPER_MAGIC;
|
||||
return(0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct inode *hppfs_alloc_inode(struct super_block *sb)
|
||||
|
|
@ -647,12 +655,13 @@ static struct inode *hppfs_alloc_inode(struct super_block *sb)
|
|||
struct hppfs_inode_info *hi;
|
||||
|
||||
hi = kmalloc(sizeof(*hi), GFP_KERNEL);
|
||||
if(hi == NULL)
|
||||
return(NULL);
|
||||
if (!hi)
|
||||
return NULL;
|
||||
|
||||
*hi = ((struct hppfs_inode_info) { .proc_dentry = NULL });
|
||||
hi->proc_dentry = NULL;
|
||||
hi->proc_mnt = NULL;
|
||||
inode_init_once(&hi->vfs_inode);
|
||||
return(&hi->vfs_inode);
|
||||
return &hi->vfs_inode;
|
||||
}
|
||||
|
||||
void hppfs_delete_inode(struct inode *ino)
|
||||
|
|
@ -665,21 +674,31 @@ static void hppfs_destroy_inode(struct inode *inode)
|
|||
kfree(HPPFS_I(inode));
|
||||
}
|
||||
|
||||
static void hppfs_put_super(struct super_block *sb)
|
||||
{
|
||||
mntput(HPPFS_I(sb->s_root->d_inode)->proc_mnt);
|
||||
}
|
||||
|
||||
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,
|
||||
.put_super = hppfs_put_super,
|
||||
};
|
||||
|
||||
static int hppfs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
|
||||
static int hppfs_readlink(struct dentry *dentry, char __user *buffer,
|
||||
int buflen)
|
||||
{
|
||||
struct file *proc_file;
|
||||
struct dentry *proc_dentry;
|
||||
struct vfsmount *proc_mnt;
|
||||
int ret;
|
||||
|
||||
proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
|
||||
proc_file = dentry_open(dget(proc_dentry), NULL, O_RDONLY);
|
||||
proc_mnt = HPPFS_I(dentry->d_inode)->proc_mnt;
|
||||
|
||||
proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt), O_RDONLY);
|
||||
if (IS_ERR(proc_file))
|
||||
return PTR_ERR(proc_file);
|
||||
|
||||
|
|
@ -694,10 +713,13 @@ static void* hppfs_follow_link(struct dentry *dentry, struct nameidata *nd)
|
|||
{
|
||||
struct file *proc_file;
|
||||
struct dentry *proc_dentry;
|
||||
struct vfsmount *proc_mnt;
|
||||
void *ret;
|
||||
|
||||
proc_dentry = HPPFS_I(dentry->d_inode)->proc_dentry;
|
||||
proc_file = dentry_open(dget(proc_dentry), NULL, O_RDONLY);
|
||||
proc_mnt = HPPFS_I(dentry->d_inode)->proc_mnt;
|
||||
|
||||
proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt), O_RDONLY);
|
||||
if (IS_ERR(proc_file))
|
||||
return proc_file;
|
||||
|
||||
|
|
@ -717,44 +739,43 @@ static const struct inode_operations hppfs_link_iops = {
|
|||
.follow_link = hppfs_follow_link,
|
||||
};
|
||||
|
||||
static int init_inode(struct inode *inode, struct dentry *dentry)
|
||||
static int init_inode(struct inode *inode, struct dentry *dentry,
|
||||
struct vfsmount *mnt)
|
||||
{
|
||||
if(S_ISDIR(dentry->d_inode->i_mode)){
|
||||
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)){
|
||||
} else if (S_ISLNK(dentry->d_inode->i_mode)) {
|
||||
inode->i_op = &hppfs_link_iops;
|
||||
inode->i_fop = &hppfs_file_fops;
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
inode->i_op = &hppfs_file_iops;
|
||||
inode->i_fop = &hppfs_file_fops;
|
||||
}
|
||||
|
||||
HPPFS_I(inode)->proc_dentry = dentry;
|
||||
HPPFS_I(inode)->proc_mnt = mnt;
|
||||
|
||||
return(0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
|
||||
{
|
||||
struct inode *root_inode;
|
||||
struct file_system_type *procfs;
|
||||
struct super_block *proc_sb;
|
||||
struct vfsmount *proc_mnt;
|
||||
int err;
|
||||
|
||||
err = -ENOENT;
|
||||
procfs = get_fs_type("proc");
|
||||
if(procfs == NULL)
|
||||
if (!procfs)
|
||||
goto out;
|
||||
|
||||
if(list_empty(&procfs->fs_supers))
|
||||
proc_mnt = vfs_kern_mount(procfs, 0, procfs->name, NULL);
|
||||
put_filesystem(procfs);
|
||||
if (IS_ERR(proc_mnt))
|
||||
goto out;
|
||||
|
||||
proc_sb = list_entry(procfs->fs_supers.next, struct super_block,
|
||||
s_instances);
|
||||
|
||||
sb->s_blocksize = 1024;
|
||||
sb->s_blocksize_bits = 10;
|
||||
sb->s_magic = HPPFS_SUPER_MAGIC;
|
||||
|
|
@ -766,21 +787,23 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent)
|
|||
goto out;
|
||||
}
|
||||
|
||||
err = init_inode(root_inode, proc_sb->s_root);
|
||||
if(err)
|
||||
goto out_put;
|
||||
err = init_inode(root_inode, proc_mnt->mnt_sb->s_root, proc_mnt);
|
||||
if (err)
|
||||
goto out_iput;
|
||||
|
||||
err = -ENOMEM;
|
||||
sb->s_root = d_alloc_root(root_inode);
|
||||
if(sb->s_root == NULL)
|
||||
goto out_put;
|
||||
if (!sb->s_root)
|
||||
goto out_iput;
|
||||
|
||||
hppfs_read_inode(root_inode);
|
||||
|
||||
return(0);
|
||||
return 0;
|
||||
|
||||
out_put:
|
||||
out_iput:
|
||||
iput(root_inode);
|
||||
out_mntput:
|
||||
mntput(proc_mnt);
|
||||
out:
|
||||
return(err);
|
||||
}
|
||||
|
|
@ -802,7 +825,7 @@ static struct file_system_type hppfs_type = {
|
|||
|
||||
static int __init init_hppfs(void)
|
||||
{
|
||||
return(register_filesystem(&hppfs_type));
|
||||
return register_filesystem(&hppfs_type);
|
||||
}
|
||||
|
||||
static void __exit exit_hppfs(void)
|
||||
|
|
@ -813,14 +836,3 @@ static void __exit exit_hppfs(void)
|
|||
module_init(init_hppfs)
|
||||
module_exit(exit_hppfs)
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
/*
|
||||
* Overrides for Emacs so that we follow Linus's tabbing style.
|
||||
* Emacs will notice this stuff at the end of the file and automatically
|
||||
* adjust the settings for this buffer only. This must remain at the end
|
||||
* of the file.
|
||||
* ---------------------------------------------------------------------------
|
||||
* Local variables:
|
||||
* c-file-style: "linux"
|
||||
* End:
|
||||
*/
|
||||
|
|
|
|||
Loading…
Reference in New Issue