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linux-next/fs/ncpfs/inode.c
Linus Torvalds aab174f0df Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull vfs update from Al Viro:

 - big one - consolidation of descriptor-related logics; almost all of
   that is moved to fs/file.c

   (BTW, I'm seriously tempted to rename the result to fd.c.  As it is,
   we have a situation when file_table.c is about handling of struct
   file and file.c is about handling of descriptor tables; the reasons
   are historical - file_table.c used to be about a static array of
   struct file we used to have way back).

   A lot of stray ends got cleaned up and converted to saner primitives,
   disgusting mess in android/binder.c is still disgusting, but at least
   doesn't poke so much in descriptor table guts anymore.  A bunch of
   relatively minor races got fixed in process, plus an ext4 struct file
   leak.

 - related thing - fget_light() partially unuglified; see fdget() in
   there (and yes, it generates the code as good as we used to have).

 - also related - bits of Cyrill's procfs stuff that got entangled into
   that work; _not_ all of it, just the initial move to fs/proc/fd.c and
   switch of fdinfo to seq_file.

 - Alex's fs/coredump.c spiltoff - the same story, had been easier to
   take that commit than mess with conflicts.  The rest is a separate
   pile, this was just a mechanical code movement.

 - a few misc patches all over the place.  Not all for this cycle,
   there'll be more (and quite a few currently sit in akpm's tree)."

Fix up trivial conflicts in the android binder driver, and some fairly
simple conflicts due to two different changes to the sock_alloc_file()
interface ("take descriptor handling from sock_alloc_file() to callers"
vs "net: Providing protocol type via system.sockprotoname xattr of
/proc/PID/fd entries" adding a dentry name to the socket)

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (72 commits)
  MAX_LFS_FILESIZE should be a loff_t
  compat: fs: Generic compat_sys_sendfile implementation
  fs: push rcu_barrier() from deactivate_locked_super() to filesystems
  btrfs: reada_extent doesn't need kref for refcount
  coredump: move core dump functionality into its own file
  coredump: prevent double-free on an error path in core dumper
  usb/gadget: fix misannotations
  fcntl: fix misannotations
  ceph: don't abuse d_delete() on failure exits
  hypfs: ->d_parent is never NULL or negative
  vfs: delete surplus inode NULL check
  switch simple cases of fget_light to fdget
  new helpers: fdget()/fdput()
  switch o2hb_region_dev_write() to fget_light()
  proc_map_files_readdir(): don't bother with grabbing files
  make get_file() return its argument
  vhost_set_vring(): turn pollstart/pollstop into bool
  switch prctl_set_mm_exe_file() to fget_light()
  switch xfs_find_handle() to fget_light()
  switch xfs_swapext() to fget_light()
  ...
2012-10-02 20:25:04 -07:00

1074 lines
27 KiB
C
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/*
* inode.c
*
* Copyright (C) 1995, 1996 by Volker Lendecke
* Modified for big endian by J.F. Chadima and David S. Miller
* Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
* Modified 1998 Wolfram Pienkoss for NLS
* Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info
*
*/
#include <linux/module.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
#include <linux/time.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/errno.h>
#include <linux/file.h>
#include <linux/fcntl.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/vfs.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/namei.h>
#include <net/sock.h>
#include "ncp_fs.h"
#include "getopt.h"
#define NCP_DEFAULT_FILE_MODE 0600
#define NCP_DEFAULT_DIR_MODE 0700
#define NCP_DEFAULT_TIME_OUT 10
#define NCP_DEFAULT_RETRY_COUNT 20
static void ncp_evict_inode(struct inode *);
static void ncp_put_super(struct super_block *);
static int ncp_statfs(struct dentry *, struct kstatfs *);
static int ncp_show_options(struct seq_file *, struct dentry *);
static struct kmem_cache * ncp_inode_cachep;
static struct inode *ncp_alloc_inode(struct super_block *sb)
{
struct ncp_inode_info *ei;
ei = (struct ncp_inode_info *)kmem_cache_alloc(ncp_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
return &ei->vfs_inode;
}
static void ncp_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(ncp_inode_cachep, NCP_FINFO(inode));
}
static void ncp_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, ncp_i_callback);
}
static void init_once(void *foo)
{
struct ncp_inode_info *ei = (struct ncp_inode_info *) foo;
mutex_init(&ei->open_mutex);
inode_init_once(&ei->vfs_inode);
}
static int init_inodecache(void)
{
ncp_inode_cachep = kmem_cache_create("ncp_inode_cache",
sizeof(struct ncp_inode_info),
0, (SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD),
init_once);
if (ncp_inode_cachep == NULL)
return -ENOMEM;
return 0;
}
static void destroy_inodecache(void)
{
/*
* Make sure all delayed rcu free inodes are flushed before we
* destroy cache.
*/
rcu_barrier();
kmem_cache_destroy(ncp_inode_cachep);
}
static int ncp_remount(struct super_block *sb, int *flags, char* data)
{
*flags |= MS_NODIRATIME;
return 0;
}
static const struct super_operations ncp_sops =
{
.alloc_inode = ncp_alloc_inode,
.destroy_inode = ncp_destroy_inode,
.drop_inode = generic_delete_inode,
.evict_inode = ncp_evict_inode,
.put_super = ncp_put_super,
.statfs = ncp_statfs,
.remount_fs = ncp_remount,
.show_options = ncp_show_options,
};
/*
* Fill in the ncpfs-specific information in the inode.
*/
static void ncp_update_dirent(struct inode *inode, struct ncp_entry_info *nwinfo)
{
NCP_FINFO(inode)->DosDirNum = nwinfo->i.DosDirNum;
NCP_FINFO(inode)->dirEntNum = nwinfo->i.dirEntNum;
NCP_FINFO(inode)->volNumber = nwinfo->volume;
}
void ncp_update_inode(struct inode *inode, struct ncp_entry_info *nwinfo)
{
ncp_update_dirent(inode, nwinfo);
NCP_FINFO(inode)->nwattr = nwinfo->i.attributes;
NCP_FINFO(inode)->access = nwinfo->access;
memcpy(NCP_FINFO(inode)->file_handle, nwinfo->file_handle,
sizeof(nwinfo->file_handle));
DPRINTK("ncp_update_inode: updated %s, volnum=%d, dirent=%u\n",
nwinfo->i.entryName, NCP_FINFO(inode)->volNumber,
NCP_FINFO(inode)->dirEntNum);
}
static void ncp_update_dates(struct inode *inode, struct nw_info_struct *nwi)
{
/* NFS namespace mode overrides others if it's set. */
DPRINTK(KERN_DEBUG "ncp_update_dates_and_mode: (%s) nfs.mode=0%o\n",
nwi->entryName, nwi->nfs.mode);
if (nwi->nfs.mode) {
/* XXX Security? */
inode->i_mode = nwi->nfs.mode;
}
inode->i_blocks = (i_size_read(inode) + NCP_BLOCK_SIZE - 1) >> NCP_BLOCK_SHIFT;
inode->i_mtime.tv_sec = ncp_date_dos2unix(nwi->modifyTime, nwi->modifyDate);
inode->i_ctime.tv_sec = ncp_date_dos2unix(nwi->creationTime, nwi->creationDate);
inode->i_atime.tv_sec = ncp_date_dos2unix(0, nwi->lastAccessDate);
inode->i_atime.tv_nsec = 0;
inode->i_mtime.tv_nsec = 0;
inode->i_ctime.tv_nsec = 0;
}
static void ncp_update_attrs(struct inode *inode, struct ncp_entry_info *nwinfo)
{
struct nw_info_struct *nwi = &nwinfo->i;
struct ncp_server *server = NCP_SERVER(inode);
if (nwi->attributes & aDIR) {
inode->i_mode = server->m.dir_mode;
/* for directories dataStreamSize seems to be some
Object ID ??? */
i_size_write(inode, NCP_BLOCK_SIZE);
} else {
u32 size;
inode->i_mode = server->m.file_mode;
size = le32_to_cpu(nwi->dataStreamSize);
i_size_write(inode, size);
#ifdef CONFIG_NCPFS_EXTRAS
if ((server->m.flags & (NCP_MOUNT_EXTRAS|NCP_MOUNT_SYMLINKS))
&& (nwi->attributes & aSHARED)) {
switch (nwi->attributes & (aHIDDEN|aSYSTEM)) {
case aHIDDEN:
if (server->m.flags & NCP_MOUNT_SYMLINKS) {
if (/* (size >= NCP_MIN_SYMLINK_SIZE)
&& */ (size <= NCP_MAX_SYMLINK_SIZE)) {
inode->i_mode = (inode->i_mode & ~S_IFMT) | S_IFLNK;
NCP_FINFO(inode)->flags |= NCPI_KLUDGE_SYMLINK;
break;
}
}
/* FALLTHROUGH */
case 0:
if (server->m.flags & NCP_MOUNT_EXTRAS)
inode->i_mode |= S_IRUGO;
break;
case aSYSTEM:
if (server->m.flags & NCP_MOUNT_EXTRAS)
inode->i_mode |= (inode->i_mode >> 2) & S_IXUGO;
break;
/* case aSYSTEM|aHIDDEN: */
default:
/* reserved combination */
break;
}
}
#endif
}
if (nwi->attributes & aRONLY) inode->i_mode &= ~S_IWUGO;
}
void ncp_update_inode2(struct inode* inode, struct ncp_entry_info *nwinfo)
{
NCP_FINFO(inode)->flags = 0;
if (!atomic_read(&NCP_FINFO(inode)->opened)) {
NCP_FINFO(inode)->nwattr = nwinfo->i.attributes;
ncp_update_attrs(inode, nwinfo);
}
ncp_update_dates(inode, &nwinfo->i);
ncp_update_dirent(inode, nwinfo);
}
/*
* Fill in the inode based on the ncp_entry_info structure. Used only for brand new inodes.
*/
static void ncp_set_attr(struct inode *inode, struct ncp_entry_info *nwinfo)
{
struct ncp_server *server = NCP_SERVER(inode);
NCP_FINFO(inode)->flags = 0;
ncp_update_attrs(inode, nwinfo);
DDPRINTK("ncp_read_inode: inode->i_mode = %u\n", inode->i_mode);
set_nlink(inode, 1);
inode->i_uid = server->m.uid;
inode->i_gid = server->m.gid;
ncp_update_dates(inode, &nwinfo->i);
ncp_update_inode(inode, nwinfo);
}
#if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS)
static const struct inode_operations ncp_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = page_follow_link_light,
.put_link = page_put_link,
.setattr = ncp_notify_change,
};
#endif
/*
* Get a new inode.
*/
struct inode *
ncp_iget(struct super_block *sb, struct ncp_entry_info *info)
{
struct inode *inode;
if (info == NULL) {
printk(KERN_ERR "ncp_iget: info is NULL\n");
return NULL;
}
inode = new_inode(sb);
if (inode) {
atomic_set(&NCP_FINFO(inode)->opened, info->opened);
inode->i_mapping->backing_dev_info = sb->s_bdi;
inode->i_ino = info->ino;
ncp_set_attr(inode, info);
if (S_ISREG(inode->i_mode)) {
inode->i_op = &ncp_file_inode_operations;
inode->i_fop = &ncp_file_operations;
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &ncp_dir_inode_operations;
inode->i_fop = &ncp_dir_operations;
#ifdef CONFIG_NCPFS_NFS_NS
} else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
init_special_inode(inode, inode->i_mode,
new_decode_dev(info->i.nfs.rdev));
#endif
#if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS)
} else if (S_ISLNK(inode->i_mode)) {
inode->i_op = &ncp_symlink_inode_operations;
inode->i_data.a_ops = &ncp_symlink_aops;
#endif
} else {
make_bad_inode(inode);
}
insert_inode_hash(inode);
} else
printk(KERN_ERR "ncp_iget: iget failed!\n");
return inode;
}
static void
ncp_evict_inode(struct inode *inode)
{
truncate_inode_pages(&inode->i_data, 0);
clear_inode(inode);
if (S_ISDIR(inode->i_mode)) {
DDPRINTK("ncp_evict_inode: put directory %ld\n", inode->i_ino);
}
if (ncp_make_closed(inode) != 0) {
/* We can't do anything but complain. */
printk(KERN_ERR "ncp_evict_inode: could not close\n");
}
}
static void ncp_stop_tasks(struct ncp_server *server) {
struct sock* sk = server->ncp_sock->sk;
lock_sock(sk);
sk->sk_error_report = server->error_report;
sk->sk_data_ready = server->data_ready;
sk->sk_write_space = server->write_space;
release_sock(sk);
del_timer_sync(&server->timeout_tm);
flush_work(&server->rcv.tq);
if (sk->sk_socket->type == SOCK_STREAM)
flush_work(&server->tx.tq);
else
flush_work(&server->timeout_tq);
}
static int ncp_show_options(struct seq_file *seq, struct dentry *root)
{
struct ncp_server *server = NCP_SBP(root->d_sb);
unsigned int tmp;
if (server->m.uid != 0)
seq_printf(seq, ",uid=%u", server->m.uid);
if (server->m.gid != 0)
seq_printf(seq, ",gid=%u", server->m.gid);
if (server->m.mounted_uid != 0)
seq_printf(seq, ",owner=%u", server->m.mounted_uid);
tmp = server->m.file_mode & S_IALLUGO;
if (tmp != NCP_DEFAULT_FILE_MODE)
seq_printf(seq, ",mode=0%o", tmp);
tmp = server->m.dir_mode & S_IALLUGO;
if (tmp != NCP_DEFAULT_DIR_MODE)
seq_printf(seq, ",dirmode=0%o", tmp);
if (server->m.time_out != NCP_DEFAULT_TIME_OUT * HZ / 100) {
tmp = server->m.time_out * 100 / HZ;
seq_printf(seq, ",timeout=%u", tmp);
}
if (server->m.retry_count != NCP_DEFAULT_RETRY_COUNT)
seq_printf(seq, ",retry=%u", server->m.retry_count);
if (server->m.flags != 0)
seq_printf(seq, ",flags=%lu", server->m.flags);
if (server->m.wdog_pid != NULL)
seq_printf(seq, ",wdogpid=%u", pid_vnr(server->m.wdog_pid));
return 0;
}
static const struct ncp_option ncp_opts[] = {
{ "uid", OPT_INT, 'u' },
{ "gid", OPT_INT, 'g' },
{ "owner", OPT_INT, 'o' },
{ "mode", OPT_INT, 'm' },
{ "dirmode", OPT_INT, 'd' },
{ "timeout", OPT_INT, 't' },
{ "retry", OPT_INT, 'r' },
{ "flags", OPT_INT, 'f' },
{ "wdogpid", OPT_INT, 'w' },
{ "ncpfd", OPT_INT, 'n' },
{ "infofd", OPT_INT, 'i' }, /* v5 */
{ "version", OPT_INT, 'v' },
{ NULL, 0, 0 } };
static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options) {
int optval;
char *optarg;
unsigned long optint;
int version = 0;
int ret;
data->flags = 0;
data->int_flags = 0;
data->mounted_uid = 0;
data->wdog_pid = NULL;
data->ncp_fd = ~0;
data->time_out = NCP_DEFAULT_TIME_OUT;
data->retry_count = NCP_DEFAULT_RETRY_COUNT;
data->uid = 0;
data->gid = 0;
data->file_mode = NCP_DEFAULT_FILE_MODE;
data->dir_mode = NCP_DEFAULT_DIR_MODE;
data->info_fd = -1;
data->mounted_vol[0] = 0;
while ((optval = ncp_getopt("ncpfs", &options, ncp_opts, NULL, &optarg, &optint)) != 0) {
ret = optval;
if (ret < 0)
goto err;
switch (optval) {
case 'u':
data->uid = optint;
break;
case 'g':
data->gid = optint;
break;
case 'o':
data->mounted_uid = optint;
break;
case 'm':
data->file_mode = optint;
break;
case 'd':
data->dir_mode = optint;
break;
case 't':
data->time_out = optint;
break;
case 'r':
data->retry_count = optint;
break;
case 'f':
data->flags = optint;
break;
case 'w':
data->wdog_pid = find_get_pid(optint);
break;
case 'n':
data->ncp_fd = optint;
break;
case 'i':
data->info_fd = optint;
break;
case 'v':
ret = -ECHRNG;
if (optint < NCP_MOUNT_VERSION_V4)
goto err;
if (optint > NCP_MOUNT_VERSION_V5)
goto err;
version = optint;
break;
}
}
return 0;
err:
put_pid(data->wdog_pid);
data->wdog_pid = NULL;
return ret;
}
static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
{
struct ncp_mount_data_kernel data;
struct ncp_server *server;
struct file *ncp_filp;
struct inode *root_inode;
struct inode *sock_inode;
struct socket *sock;
int error;
int default_bufsize;
#ifdef CONFIG_NCPFS_PACKET_SIGNING
int options;
#endif
struct ncp_entry_info finfo;
memset(&data, 0, sizeof(data));
server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
if (!server)
return -ENOMEM;
sb->s_fs_info = server;
error = -EFAULT;
if (raw_data == NULL)
goto out;
switch (*(int*)raw_data) {
case NCP_MOUNT_VERSION:
{
struct ncp_mount_data* md = (struct ncp_mount_data*)raw_data;
data.flags = md->flags;
data.int_flags = NCP_IMOUNT_LOGGEDIN_POSSIBLE;
data.mounted_uid = md->mounted_uid;
data.wdog_pid = find_get_pid(md->wdog_pid);
data.ncp_fd = md->ncp_fd;
data.time_out = md->time_out;
data.retry_count = md->retry_count;
data.uid = md->uid;
data.gid = md->gid;
data.file_mode = md->file_mode;
data.dir_mode = md->dir_mode;
data.info_fd = -1;
memcpy(data.mounted_vol, md->mounted_vol,
NCP_VOLNAME_LEN+1);
}
break;
case NCP_MOUNT_VERSION_V4:
{
struct ncp_mount_data_v4* md = (struct ncp_mount_data_v4*)raw_data;
data.flags = md->flags;
data.mounted_uid = md->mounted_uid;
data.wdog_pid = find_get_pid(md->wdog_pid);
data.ncp_fd = md->ncp_fd;
data.time_out = md->time_out;
data.retry_count = md->retry_count;
data.uid = md->uid;
data.gid = md->gid;
data.file_mode = md->file_mode;
data.dir_mode = md->dir_mode;
data.info_fd = -1;
}
break;
default:
error = -ECHRNG;
if (memcmp(raw_data, "vers", 4) == 0) {
error = ncp_parse_options(&data, raw_data);
}
if (error)
goto out;
break;
}
error = -EBADF;
ncp_filp = fget(data.ncp_fd);
if (!ncp_filp)
goto out;
error = -ENOTSOCK;
sock_inode = ncp_filp->f_path.dentry->d_inode;
if (!S_ISSOCK(sock_inode->i_mode))
goto out_fput;
sock = SOCKET_I(sock_inode);
if (!sock)
goto out_fput;
if (sock->type == SOCK_STREAM)
default_bufsize = 0xF000;
else
default_bufsize = 1024;
sb->s_flags |= MS_NODIRATIME; /* probably even noatime */
sb->s_maxbytes = 0xFFFFFFFFU;
sb->s_blocksize = 1024; /* Eh... Is this correct? */
sb->s_blocksize_bits = 10;
sb->s_magic = NCP_SUPER_MAGIC;
sb->s_op = &ncp_sops;
sb->s_d_op = &ncp_dentry_operations;
sb->s_bdi = &server->bdi;
server = NCP_SBP(sb);
memset(server, 0, sizeof(*server));
error = bdi_setup_and_register(&server->bdi, "ncpfs", BDI_CAP_MAP_COPY);
if (error)
goto out_fput;
server->ncp_filp = ncp_filp;
server->ncp_sock = sock;
if (data.info_fd != -1) {
struct socket *info_sock;
error = -EBADF;
server->info_filp = fget(data.info_fd);
if (!server->info_filp)
goto out_bdi;
error = -ENOTSOCK;
sock_inode = server->info_filp->f_path.dentry->d_inode;
if (!S_ISSOCK(sock_inode->i_mode))
goto out_fput2;
info_sock = SOCKET_I(sock_inode);
if (!info_sock)
goto out_fput2;
error = -EBADFD;
if (info_sock->type != SOCK_STREAM)
goto out_fput2;
server->info_sock = info_sock;
}
/* server->lock = 0; */
mutex_init(&server->mutex);
server->packet = NULL;
/* server->buffer_size = 0; */
/* server->conn_status = 0; */
/* server->root_dentry = NULL; */
/* server->root_setuped = 0; */
mutex_init(&server->root_setup_lock);
#ifdef CONFIG_NCPFS_PACKET_SIGNING
/* server->sign_wanted = 0; */
/* server->sign_active = 0; */
#endif
init_rwsem(&server->auth_rwsem);
server->auth.auth_type = NCP_AUTH_NONE;
/* server->auth.object_name_len = 0; */
/* server->auth.object_name = NULL; */
/* server->auth.object_type = 0; */
/* server->priv.len = 0; */
/* server->priv.data = NULL; */
server->m = data;
/* Although anything producing this is buggy, it happens
now because of PATH_MAX changes.. */
if (server->m.time_out < 1) {
server->m.time_out = 10;
printk(KERN_INFO "You need to recompile your ncpfs utils..\n");
}
server->m.time_out = server->m.time_out * HZ / 100;
server->m.file_mode = (server->m.file_mode & S_IRWXUGO) | S_IFREG;
server->m.dir_mode = (server->m.dir_mode & S_IRWXUGO) | S_IFDIR;
#ifdef CONFIG_NCPFS_NLS
/* load the default NLS charsets */
server->nls_vol = load_nls_default();
server->nls_io = load_nls_default();
#endif /* CONFIG_NCPFS_NLS */
atomic_set(&server->dentry_ttl, 0); /* no caching */
INIT_LIST_HEAD(&server->tx.requests);
mutex_init(&server->rcv.creq_mutex);
server->tx.creq = NULL;
server->rcv.creq = NULL;
init_timer(&server->timeout_tm);
#undef NCP_PACKET_SIZE
#define NCP_PACKET_SIZE 131072
error = -ENOMEM;
server->packet_size = NCP_PACKET_SIZE;
server->packet = vmalloc(NCP_PACKET_SIZE);
if (server->packet == NULL)
goto out_nls;
server->txbuf = vmalloc(NCP_PACKET_SIZE);
if (server->txbuf == NULL)
goto out_packet;
server->rxbuf = vmalloc(NCP_PACKET_SIZE);
if (server->rxbuf == NULL)
goto out_txbuf;
lock_sock(sock->sk);
server->data_ready = sock->sk->sk_data_ready;
server->write_space = sock->sk->sk_write_space;
server->error_report = sock->sk->sk_error_report;
sock->sk->sk_user_data = server;
sock->sk->sk_data_ready = ncp_tcp_data_ready;
sock->sk->sk_error_report = ncp_tcp_error_report;
if (sock->type == SOCK_STREAM) {
server->rcv.ptr = (unsigned char*)&server->rcv.buf;
server->rcv.len = 10;
server->rcv.state = 0;
INIT_WORK(&server->rcv.tq, ncp_tcp_rcv_proc);
INIT_WORK(&server->tx.tq, ncp_tcp_tx_proc);
sock->sk->sk_write_space = ncp_tcp_write_space;
} else {
INIT_WORK(&server->rcv.tq, ncpdgram_rcv_proc);
INIT_WORK(&server->timeout_tq, ncpdgram_timeout_proc);
server->timeout_tm.data = (unsigned long)server;
server->timeout_tm.function = ncpdgram_timeout_call;
}
release_sock(sock->sk);
ncp_lock_server(server);
error = ncp_connect(server);
ncp_unlock_server(server);
if (error < 0)
goto out_rxbuf;
DPRINTK("ncp_fill_super: NCP_SBP(sb) = %x\n", (int) NCP_SBP(sb));
error = -EMSGSIZE; /* -EREMOTESIDEINCOMPATIBLE */
#ifdef CONFIG_NCPFS_PACKET_SIGNING
if (ncp_negotiate_size_and_options(server, default_bufsize,
NCP_DEFAULT_OPTIONS, &(server->buffer_size), &options) == 0)
{
if (options != NCP_DEFAULT_OPTIONS)
{
if (ncp_negotiate_size_and_options(server,
default_bufsize,
options & 2,
&(server->buffer_size), &options) != 0)
{
goto out_disconnect;
}
}
ncp_lock_server(server);
if (options & 2)
server->sign_wanted = 1;
ncp_unlock_server(server);
}
else
#endif /* CONFIG_NCPFS_PACKET_SIGNING */
if (ncp_negotiate_buffersize(server, default_bufsize,
&(server->buffer_size)) != 0)
goto out_disconnect;
DPRINTK("ncpfs: bufsize = %d\n", server->buffer_size);
memset(&finfo, 0, sizeof(finfo));
finfo.i.attributes = aDIR;
finfo.i.dataStreamSize = 0; /* ignored */
finfo.i.dirEntNum = 0;
finfo.i.DosDirNum = 0;
#ifdef CONFIG_NCPFS_SMALLDOS
finfo.i.NSCreator = NW_NS_DOS;
#endif
finfo.volume = NCP_NUMBER_OF_VOLUMES;
/* set dates of mountpoint to Jan 1, 1986; 00:00 */
finfo.i.creationTime = finfo.i.modifyTime
= cpu_to_le16(0x0000);
finfo.i.creationDate = finfo.i.modifyDate
= finfo.i.lastAccessDate
= cpu_to_le16(0x0C21);
finfo.i.nameLen = 0;
finfo.i.entryName[0] = '\0';
finfo.opened = 0;
finfo.ino = 2; /* tradition */
server->name_space[finfo.volume] = NW_NS_DOS;
error = -ENOMEM;
root_inode = ncp_iget(sb, &finfo);
if (!root_inode)
goto out_disconnect;
DPRINTK("ncp_fill_super: root vol=%d\n", NCP_FINFO(root_inode)->volNumber);
sb->s_root = d_make_root(root_inode);
if (!sb->s_root)
goto out_disconnect;
return 0;
out_disconnect:
ncp_lock_server(server);
ncp_disconnect(server);
ncp_unlock_server(server);
out_rxbuf:
ncp_stop_tasks(server);
vfree(server->rxbuf);
out_txbuf:
vfree(server->txbuf);
out_packet:
vfree(server->packet);
out_nls:
#ifdef CONFIG_NCPFS_NLS
unload_nls(server->nls_io);
unload_nls(server->nls_vol);
#endif
mutex_destroy(&server->rcv.creq_mutex);
mutex_destroy(&server->root_setup_lock);
mutex_destroy(&server->mutex);
out_fput2:
if (server->info_filp)
fput(server->info_filp);
out_bdi:
bdi_destroy(&server->bdi);
out_fput:
/* 23/12/1998 Marcin Dalecki <dalecki@cs.net.pl>:
*
* The previously used put_filp(ncp_filp); was bogus, since
* it doesn't perform proper unlocking.
*/
fput(ncp_filp);
out:
put_pid(data.wdog_pid);
sb->s_fs_info = NULL;
kfree(server);
return error;
}
static void ncp_put_super(struct super_block *sb)
{
struct ncp_server *server = NCP_SBP(sb);
ncp_lock_server(server);
ncp_disconnect(server);
ncp_unlock_server(server);
ncp_stop_tasks(server);
#ifdef CONFIG_NCPFS_NLS
/* unload the NLS charsets */
unload_nls(server->nls_vol);
unload_nls(server->nls_io);
#endif /* CONFIG_NCPFS_NLS */
mutex_destroy(&server->rcv.creq_mutex);
mutex_destroy(&server->root_setup_lock);
mutex_destroy(&server->mutex);
if (server->info_filp)
fput(server->info_filp);
fput(server->ncp_filp);
kill_pid(server->m.wdog_pid, SIGTERM, 1);
put_pid(server->m.wdog_pid);
bdi_destroy(&server->bdi);
kfree(server->priv.data);
kfree(server->auth.object_name);
vfree(server->rxbuf);
vfree(server->txbuf);
vfree(server->packet);
sb->s_fs_info = NULL;
kfree(server);
}
static int ncp_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct dentry* d;
struct inode* i;
struct ncp_inode_info* ni;
struct ncp_server* s;
struct ncp_volume_info vi;
struct super_block *sb = dentry->d_sb;
int err;
__u8 dh;
d = sb->s_root;
if (!d) {
goto dflt;
}
i = d->d_inode;
if (!i) {
goto dflt;
}
ni = NCP_FINFO(i);
if (!ni) {
goto dflt;
}
s = NCP_SBP(sb);
if (!s) {
goto dflt;
}
if (!s->m.mounted_vol[0]) {
goto dflt;
}
err = ncp_dirhandle_alloc(s, ni->volNumber, ni->DosDirNum, &dh);
if (err) {
goto dflt;
}
err = ncp_get_directory_info(s, dh, &vi);
ncp_dirhandle_free(s, dh);
if (err) {
goto dflt;
}
buf->f_type = NCP_SUPER_MAGIC;
buf->f_bsize = vi.sectors_per_block * 512;
buf->f_blocks = vi.total_blocks;
buf->f_bfree = vi.free_blocks;
buf->f_bavail = vi.free_blocks;
buf->f_files = vi.total_dir_entries;
buf->f_ffree = vi.available_dir_entries;
buf->f_namelen = 12;
return 0;
/* We cannot say how much disk space is left on a mounted
NetWare Server, because free space is distributed over
volumes, and the current user might have disk quotas. So
free space is not that simple to determine. Our decision
here is to err conservatively. */
dflt:;
buf->f_type = NCP_SUPER_MAGIC;
buf->f_bsize = NCP_BLOCK_SIZE;
buf->f_blocks = 0;
buf->f_bfree = 0;
buf->f_bavail = 0;
buf->f_namelen = 12;
return 0;
}
int ncp_notify_change(struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = dentry->d_inode;
int result = 0;
__le32 info_mask;
struct nw_modify_dos_info info;
struct ncp_server *server;
result = -EIO;
server = NCP_SERVER(inode);
if (!server) /* How this could happen? */
goto out;
/* ageing the dentry to force validation */
ncp_age_dentry(server, dentry);
result = inode_change_ok(inode, attr);
if (result < 0)
goto out;
result = -EPERM;
if (((attr->ia_valid & ATTR_UID) &&
(attr->ia_uid != server->m.uid)))
goto out;
if (((attr->ia_valid & ATTR_GID) &&
(attr->ia_gid != server->m.gid)))
goto out;
if (((attr->ia_valid & ATTR_MODE) &&
(attr->ia_mode &
~(S_IFREG | S_IFDIR | S_IRWXUGO))))
goto out;
info_mask = 0;
memset(&info, 0, sizeof(info));
#if 1
if ((attr->ia_valid & ATTR_MODE) != 0)
{
umode_t newmode = attr->ia_mode;
info_mask |= DM_ATTRIBUTES;
if (S_ISDIR(inode->i_mode)) {
newmode &= server->m.dir_mode;
} else {
#ifdef CONFIG_NCPFS_EXTRAS
if (server->m.flags & NCP_MOUNT_EXTRAS) {
/* any non-default execute bit set */
if (newmode & ~server->m.file_mode & S_IXUGO)
info.attributes |= aSHARED | aSYSTEM;
/* read for group/world and not in default file_mode */
else if (newmode & ~server->m.file_mode & S_IRUGO)
info.attributes |= aSHARED;
} else
#endif
newmode &= server->m.file_mode;
}
if (newmode & S_IWUGO)
info.attributes &= ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
else
info.attributes |= (aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
#ifdef CONFIG_NCPFS_NFS_NS
if (ncp_is_nfs_extras(server, NCP_FINFO(inode)->volNumber)) {
result = ncp_modify_nfs_info(server,
NCP_FINFO(inode)->volNumber,
NCP_FINFO(inode)->dirEntNum,
attr->ia_mode, 0);
if (result != 0)
goto out;
info.attributes &= ~(aSHARED | aSYSTEM);
{
/* mark partial success */
struct iattr tmpattr;
tmpattr.ia_valid = ATTR_MODE;
tmpattr.ia_mode = attr->ia_mode;
setattr_copy(inode, &tmpattr);
mark_inode_dirty(inode);
}
}
#endif
}
#endif
/* Do SIZE before attributes, otherwise mtime together with size does not work...
*/
if ((attr->ia_valid & ATTR_SIZE) != 0) {
int written;
DPRINTK("ncpfs: trying to change size to %ld\n",
attr->ia_size);
if ((result = ncp_make_open(inode, O_WRONLY)) < 0) {
result = -EACCES;
goto out;
}
ncp_write_kernel(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle,
attr->ia_size, 0, "", &written);
/* According to ndir, the changes only take effect after
closing the file */
ncp_inode_close(inode);
result = ncp_make_closed(inode);
if (result)
goto out;
if (attr->ia_size != i_size_read(inode)) {
result = vmtruncate(inode, attr->ia_size);
if (result)
goto out;
mark_inode_dirty(inode);
}
}
if ((attr->ia_valid & ATTR_CTIME) != 0) {
info_mask |= (DM_CREATE_TIME | DM_CREATE_DATE);
ncp_date_unix2dos(attr->ia_ctime.tv_sec,
&info.creationTime, &info.creationDate);
}
if ((attr->ia_valid & ATTR_MTIME) != 0) {
info_mask |= (DM_MODIFY_TIME | DM_MODIFY_DATE);
ncp_date_unix2dos(attr->ia_mtime.tv_sec,
&info.modifyTime, &info.modifyDate);
}
if ((attr->ia_valid & ATTR_ATIME) != 0) {
__le16 dummy;
info_mask |= (DM_LAST_ACCESS_DATE);
ncp_date_unix2dos(attr->ia_atime.tv_sec,
&dummy, &info.lastAccessDate);
}
if (info_mask != 0) {
result = ncp_modify_file_or_subdir_dos_info(NCP_SERVER(inode),
inode, info_mask, &info);
if (result != 0) {
if (info_mask == (DM_CREATE_TIME | DM_CREATE_DATE)) {
/* NetWare seems not to allow this. I
do not know why. So, just tell the
user everything went fine. This is
a terrible hack, but I do not know
how to do this correctly. */
result = 0;
} else
goto out;
}
#ifdef CONFIG_NCPFS_STRONG
if ((!result) && (info_mask & DM_ATTRIBUTES))
NCP_FINFO(inode)->nwattr = info.attributes;
#endif
}
if (result)
goto out;
setattr_copy(inode, attr);
mark_inode_dirty(inode);
out:
if (result > 0)
result = -EACCES;
return result;
}
static struct dentry *ncp_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
return mount_nodev(fs_type, flags, data, ncp_fill_super);
}
static struct file_system_type ncp_fs_type = {
.owner = THIS_MODULE,
.name = "ncpfs",
.mount = ncp_mount,
.kill_sb = kill_anon_super,
.fs_flags = FS_BINARY_MOUNTDATA,
};
static int __init init_ncp_fs(void)
{
int err;
DPRINTK("ncpfs: init_ncp_fs called\n");
err = init_inodecache();
if (err)
goto out1;
err = register_filesystem(&ncp_fs_type);
if (err)
goto out;
return 0;
out:
destroy_inodecache();
out1:
return err;
}
static void __exit exit_ncp_fs(void)
{
DPRINTK("ncpfs: exit_ncp_fs called\n");
unregister_filesystem(&ncp_fs_type);
destroy_inodecache();
}
module_init(init_ncp_fs)
module_exit(exit_ncp_fs)
MODULE_LICENSE("GPL");
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