struct dentry *dentry;
} Node;
-static rwlock_t entries_lock = RW_LOCK_UNLOCKED;
+static DEFINE_RWLOCK(entries_lock);
+static struct file_system_type bm_fs_type;
static struct vfsmount *bm_mnt;
static int entry_count;
char *iname_addr = iname;
int retval;
int fd_binary = -1;
- char fd_str[12];
struct files_struct *files = NULL;
retval = -ENOEXEC;
}
if (fmt->flags & MISC_FMT_OPEN_BINARY) {
- char *fdsp = fd_str;
files = current->files;
retval = unshare_files();
/* if the binary is not readable than enforce mm->dumpable=0
regardless of the interpreter's permissions */
- if (permission(bprm->file->f_dentry->d_inode, MAY_READ, NULL))
+ if (file_permission(bprm->file, MAY_READ))
bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
allow_write_access(bprm->file);
bprm->file = NULL;
- /* make argv[1] be the file descriptor of the binary */
- snprintf(fd_str, sizeof(fd_str), "%d", fd_binary);
- retval = copy_strings_kernel(1, &fdsp, bprm);
- if (retval < 0)
- goto _error;
- bprm->argc++;
+ /* mark the bprm that fd should be passed to interp */
+ bprm->interp_flags |= BINPRM_FLAGS_EXECFD;
+ bprm->interp_data = fd_binary;
} else {
allow_write_access(bprm->file);
fput(bprm->file);
bprm->file = NULL;
- /* make argv[1] be the path to the binary */
- retval = copy_strings_kernel (1, &bprm->interp, bprm);
- if (retval < 0)
- goto _error;
- bprm->argc++;
}
+ /* make argv[1] be the path to the binary */
+ retval = copy_strings_kernel (1, &bprm->interp, bprm);
+ if (retval < 0)
+ goto _error;
+ bprm->argc++;
+
+ /* add the interp as argv[0] */
retval = copy_strings_kernel (1, &iname_addr, bprm);
if (retval < 0)
goto _error;
bprm->argc ++;
+
bprm->interp = iname; /* for binfmt_script */
interp_file = open_exec (iname);
goto _error;
if (files) {
- steal_locks(files);
put_files_struct(files);
files = NULL;
}
if (fd_binary > 0)
sys_close(fd_binary);
bprm->interp_flags = 0;
+ bprm->interp_data = 0;
_unshare:
if (files) {
put_files_struct(current->files);
return p - from;
}
-static inline char * check_special_flags (char * sfs, Node * e)
+static char * check_special_flags (char * sfs, Node * e)
{
char * p = sfs;
int cont = 1;
inode->i_mode = mode;
inode->i_uid = 0;
inode->i_gid = 0;
- inode->i_blksize = PAGE_CACHE_SIZE;
inode->i_blocks = 0;
- inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ inode->i_atime = inode->i_mtime = inode->i_ctime =
+ current_fs_time(inode->i_sb);
}
return inode;
}
static void bm_clear_inode(struct inode *inode)
{
- kfree(inode->u.generic_ip);
+ kfree(inode->i_private);
}
static void kill_node(Node *e)
static ssize_t
bm_entry_read(struct file * file, char __user * buf, size_t nbytes, loff_t *ppos)
{
- Node *e = file->f_dentry->d_inode->u.generic_ip;
+ Node *e = file->f_dentry->d_inode->i_private;
loff_t pos = *ppos;
ssize_t res;
char *page;
size_t count, loff_t *ppos)
{
struct dentry *root;
- Node *e = file->f_dentry->d_inode->u.generic_ip;
+ Node *e = file->f_dentry->d_inode->i_private;
int res = parse_command(buffer, count);
switch (res) {
case 2: set_bit(Enabled, &e->flags);
break;
case 3: root = dget(file->f_vfsmnt->mnt_sb->s_root);
- down(&root->d_inode->i_sem);
+ mutex_lock(&root->d_inode->i_mutex);
kill_node(e);
- up(&root->d_inode->i_sem);
+ mutex_unlock(&root->d_inode->i_mutex);
dput(root);
break;
default: return res;
return count;
}
-static struct file_operations bm_entry_operations = {
+static const struct file_operations bm_entry_operations = {
.read = bm_entry_read,
.write = bm_entry_write,
};
return PTR_ERR(e);
root = dget(sb->s_root);
- down(&root->d_inode->i_sem);
+ mutex_lock(&root->d_inode->i_mutex);
dentry = lookup_one_len(e->name, root, strlen(e->name));
err = PTR_ERR(dentry);
if (IS_ERR(dentry))
if (!inode)
goto out2;
- err = simple_pin_fs("binfmt_misc", &bm_mnt, &entry_count);
+ err = simple_pin_fs(&bm_fs_type, &bm_mnt, &entry_count);
if (err) {
iput(inode);
inode = NULL;
}
e->dentry = dget(dentry);
- inode->u.generic_ip = e;
+ inode->i_private = e;
inode->i_fop = &bm_entry_operations;
d_instantiate(dentry, inode);
out2:
dput(dentry);
out:
- up(&root->d_inode->i_sem);
+ mutex_unlock(&root->d_inode->i_mutex);
dput(root);
if (err) {
return count;
}
-static struct file_operations bm_register_operations = {
+static const struct file_operations bm_register_operations = {
.write = bm_register_write,
};
case 1: enabled = 0; break;
case 2: enabled = 1; break;
case 3: root = dget(file->f_vfsmnt->mnt_sb->s_root);
- down(&root->d_inode->i_sem);
+ mutex_lock(&root->d_inode->i_mutex);
while (!list_empty(&entries))
kill_node(list_entry(entries.next, Node, list));
- up(&root->d_inode->i_sem);
+ mutex_unlock(&root->d_inode->i_mutex);
dput(root);
default: return res;
}
return count;
}
-static struct file_operations bm_status_operations = {
+static const struct file_operations bm_status_operations = {
.read = bm_status_read,
.write = bm_status_write,
};
return err;
}
-static struct super_block *bm_get_sb(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int bm_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
{
- return get_sb_single(fs_type, flags, data, bm_fill_super);
+ return get_sb_single(fs_type, flags, data, bm_fill_super, mnt);
}
static struct linux_binfmt misc_format = {