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linux_dsm_epyc7002/fs/ncpfs/ioctl.c
Petr Vandrovec 54f67f631d [PATCH] Move ncpfs 32bit compat ioctl to ncpfs 
The ncp specific compat ioctls are clearly local to one file system, so the
code can better live there.

This version of the patch moves everything into the generic ioctl handler
and uses it for both 32 and 64 bit calls.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-01 00:39:23 -07:00

837 lines
21 KiB
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/*
* ioctl.c
*
* Copyright (C) 1995, 1996 by Volker Lendecke
* Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
* Modified 1998, 1999 Wolfram Pienkoss for NLS
*
*/
#include <linux/capability.h>
#include <linux/compat.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/highuid.h>
#include <linux/smp_lock.h>
#include <linux/vmalloc.h>
#include <linux/ncp_fs.h>
#include <asm/uaccess.h>
#include "ncplib_kernel.h"
/* maximum limit for ncp_objectname_ioctl */
#define NCP_OBJECT_NAME_MAX_LEN 4096
/* maximum limit for ncp_privatedata_ioctl */
#define NCP_PRIVATE_DATA_MAX_LEN 8192
/* maximum negotiable packet size */
#define NCP_PACKET_SIZE_INTERNAL 65536
static int
ncp_get_fs_info(struct ncp_server * server, struct file *file,
struct ncp_fs_info __user *arg)
{
struct inode *inode = file->f_dentry->d_inode;
struct ncp_fs_info info;
if ((file_permission(file, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid)) {
return -EACCES;
}
if (copy_from_user(&info, arg, sizeof(info)))
return -EFAULT;
if (info.version != NCP_GET_FS_INFO_VERSION) {
DPRINTK("info.version invalid: %d\n", info.version);
return -EINVAL;
}
/* TODO: info.addr = server->m.serv_addr; */
SET_UID(info.mounted_uid, server->m.mounted_uid);
info.connection = server->connection;
info.buffer_size = server->buffer_size;
info.volume_number = NCP_FINFO(inode)->volNumber;
info.directory_id = NCP_FINFO(inode)->DosDirNum;
if (copy_to_user(arg, &info, sizeof(info)))
return -EFAULT;
return 0;
}
static int
ncp_get_fs_info_v2(struct ncp_server * server, struct file *file,
struct ncp_fs_info_v2 __user * arg)
{
struct inode *inode = file->f_dentry->d_inode;
struct ncp_fs_info_v2 info2;
if ((file_permission(file, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid)) {
return -EACCES;
}
if (copy_from_user(&info2, arg, sizeof(info2)))
return -EFAULT;
if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
DPRINTK("info.version invalid: %d\n", info2.version);
return -EINVAL;
}
info2.mounted_uid = server->m.mounted_uid;
info2.connection = server->connection;
info2.buffer_size = server->buffer_size;
info2.volume_number = NCP_FINFO(inode)->volNumber;
info2.directory_id = NCP_FINFO(inode)->DosDirNum;
info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
if (copy_to_user(arg, &info2, sizeof(info2)))
return -EFAULT;
return 0;
}
#ifdef CONFIG_COMPAT
struct compat_ncp_objectname_ioctl
{
s32 auth_type;
u32 object_name_len;
compat_caddr_t object_name; /* an userspace data, in most cases user name */
};
struct compat_ncp_fs_info_v2 {
s32 version;
u32 mounted_uid;
u32 connection;
u32 buffer_size;
u32 volume_number;
u32 directory_id;
u32 dummy1;
u32 dummy2;
u32 dummy3;
};
struct compat_ncp_ioctl_request {
u32 function;
u32 size;
compat_caddr_t data;
};
struct compat_ncp_privatedata_ioctl
{
u32 len;
compat_caddr_t data; /* ~1000 for NDS */
};
#define NCP_IOC_GET_FS_INFO_V2_32 _IOWR('n', 4, struct compat_ncp_fs_info_v2)
#define NCP_IOC_NCPREQUEST_32 _IOR('n', 1, struct compat_ncp_ioctl_request)
#define NCP_IOC_GETOBJECTNAME_32 _IOWR('n', 9, struct compat_ncp_objectname_ioctl)
#define NCP_IOC_SETOBJECTNAME_32 _IOR('n', 9, struct compat_ncp_objectname_ioctl)
#define NCP_IOC_GETPRIVATEDATA_32 _IOWR('n', 10, struct compat_ncp_privatedata_ioctl)
#define NCP_IOC_SETPRIVATEDATA_32 _IOR('n', 10, struct compat_ncp_privatedata_ioctl)
static int
ncp_get_compat_fs_info_v2(struct ncp_server * server, struct file *file,
struct compat_ncp_fs_info_v2 __user * arg)
{
struct inode *inode = file->f_dentry->d_inode;
struct compat_ncp_fs_info_v2 info2;
if ((file_permission(file, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid)) {
return -EACCES;
}
if (copy_from_user(&info2, arg, sizeof(info2)))
return -EFAULT;
if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
DPRINTK("info.version invalid: %d\n", info2.version);
return -EINVAL;
}
info2.mounted_uid = server->m.mounted_uid;
info2.connection = server->connection;
info2.buffer_size = server->buffer_size;
info2.volume_number = NCP_FINFO(inode)->volNumber;
info2.directory_id = NCP_FINFO(inode)->DosDirNum;
info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
if (copy_to_user(arg, &info2, sizeof(info2)))
return -EFAULT;
return 0;
}
#endif
#define NCP_IOC_GETMOUNTUID16 _IOW('n', 2, u16)
#define NCP_IOC_GETMOUNTUID32 _IOW('n', 2, u32)
#define NCP_IOC_GETMOUNTUID64 _IOW('n', 2, u64)
#ifdef CONFIG_NCPFS_NLS
/* Here we are select the iocharset and the codepage for NLS.
* Thanks Petr Vandrovec for idea and many hints.
*/
static int
ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
{
struct ncp_nls_ioctl user;
struct nls_table *codepage;
struct nls_table *iocharset;
struct nls_table *oldset_io;
struct nls_table *oldset_cp;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (server->root_setuped)
return -EBUSY;
if (copy_from_user(&user, arg, sizeof(user)))
return -EFAULT;
codepage = NULL;
user.codepage[NCP_IOCSNAME_LEN] = 0;
if (!user.codepage[0] || !strcmp(user.codepage, "default"))
codepage = load_nls_default();
else {
codepage = load_nls(user.codepage);
if (!codepage) {
return -EBADRQC;
}
}
iocharset = NULL;
user.iocharset[NCP_IOCSNAME_LEN] = 0;
if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) {
iocharset = load_nls_default();
NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
} else if (!strcmp(user.iocharset, "utf8")) {
iocharset = load_nls_default();
NCP_SET_FLAG(server, NCP_FLAG_UTF8);
} else {
iocharset = load_nls(user.iocharset);
if (!iocharset) {
unload_nls(codepage);
return -EBADRQC;
}
NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
}
oldset_cp = server->nls_vol;
server->nls_vol = codepage;
oldset_io = server->nls_io;
server->nls_io = iocharset;
if (oldset_cp)
unload_nls(oldset_cp);
if (oldset_io)
unload_nls(oldset_io);
return 0;
}
static int
ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
{
struct ncp_nls_ioctl user;
int len;
memset(&user, 0, sizeof(user));
if (server->nls_vol && server->nls_vol->charset) {
len = strlen(server->nls_vol->charset);
if (len > NCP_IOCSNAME_LEN)
len = NCP_IOCSNAME_LEN;
strncpy(user.codepage, server->nls_vol->charset, len);
user.codepage[len] = 0;
}
if (NCP_IS_FLAG(server, NCP_FLAG_UTF8))
strcpy(user.iocharset, "utf8");
else if (server->nls_io && server->nls_io->charset) {
len = strlen(server->nls_io->charset);
if (len > NCP_IOCSNAME_LEN)
len = NCP_IOCSNAME_LEN;
strncpy(user.iocharset, server->nls_io->charset, len);
user.iocharset[len] = 0;
}
if (copy_to_user(arg, &user, sizeof(user)))
return -EFAULT;
return 0;
}
#endif /* CONFIG_NCPFS_NLS */
int ncp_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct ncp_server *server = NCP_SERVER(inode);
int result;
struct ncp_ioctl_request request;
char* bouncebuffer;
void __user *argp = (void __user *)arg;
switch (cmd) {
#ifdef CONFIG_COMPAT
case NCP_IOC_NCPREQUEST_32:
#endif
case NCP_IOC_NCPREQUEST:
if ((file_permission(filp, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid)) {
return -EACCES;
}
#ifdef CONFIG_COMPAT
if (cmd == NCP_IOC_NCPREQUEST_32) {
struct compat_ncp_ioctl_request request32;
if (copy_from_user(&request32, argp, sizeof(request32)))
return -EFAULT;
request.function = request32.function;
request.size = request32.size;
request.data = compat_ptr(request32.data);
} else
#endif
if (copy_from_user(&request, argp, sizeof(request)))
return -EFAULT;
if ((request.function > 255)
|| (request.size >
NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
return -EINVAL;
}
bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
if (!bouncebuffer)
return -ENOMEM;
if (copy_from_user(bouncebuffer, request.data, request.size)) {
vfree(bouncebuffer);
return -EFAULT;
}
ncp_lock_server(server);
/* FIXME: We hack around in the server's structures
here to be able to use ncp_request */
server->has_subfunction = 0;
server->current_size = request.size;
memcpy(server->packet, bouncebuffer, request.size);
result = ncp_request2(server, request.function,
bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
if (result < 0)
result = -EIO;
else
result = server->reply_size;
ncp_unlock_server(server);
DPRINTK("ncp_ioctl: copy %d bytes\n",
result);
if (result >= 0)
if (copy_to_user(request.data, bouncebuffer, result))
result = -EFAULT;
vfree(bouncebuffer);
return result;
case NCP_IOC_CONN_LOGGED_IN:
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
return -EINVAL;
if (server->root_setuped)
return -EBUSY;
server->root_setuped = 1;
return ncp_conn_logged_in(inode->i_sb);
case NCP_IOC_GET_FS_INFO:
return ncp_get_fs_info(server, filp, argp);
case NCP_IOC_GET_FS_INFO_V2:
return ncp_get_fs_info_v2(server, filp, argp);
#ifdef CONFIG_COMPAT
case NCP_IOC_GET_FS_INFO_V2_32:
return ncp_get_compat_fs_info_v2(server, filp, argp);
#endif
/* we have too many combinations of CONFIG_COMPAT,
* CONFIG_64BIT and CONFIG_UID16, so just handle
* any of the possible ioctls */
case NCP_IOC_GETMOUNTUID16:
case NCP_IOC_GETMOUNTUID32:
case NCP_IOC_GETMOUNTUID64:
if ((file_permission(filp, MAY_READ) != 0)
&& (current->uid != server->m.mounted_uid)) {
return -EACCES;
}
if (cmd == NCP_IOC_GETMOUNTUID16) {
u16 uid;
SET_UID(uid, server->m.mounted_uid);
if (put_user(uid, (u16 __user *)argp))
return -EFAULT;
} else if (cmd == NCP_IOC_GETMOUNTUID32) {
if (put_user(server->m.mounted_uid,
(u32 __user *)argp))
return -EFAULT;
} else {
if (put_user(server->m.mounted_uid,
(u64 __user *)argp))
return -EFAULT;
}
return 0;
case NCP_IOC_GETROOT:
{
struct ncp_setroot_ioctl sr;
if ((file_permission(filp, MAY_READ) != 0)
&& (current->uid != server->m.mounted_uid))
{
return -EACCES;
}
if (server->m.mounted_vol[0]) {
struct dentry* dentry = inode->i_sb->s_root;
if (dentry) {
struct inode* inode = dentry->d_inode;
if (inode) {
sr.volNumber = NCP_FINFO(inode)->volNumber;
sr.dirEntNum = NCP_FINFO(inode)->dirEntNum;
sr.namespace = server->name_space[sr.volNumber];
} else
DPRINTK("ncpfs: s_root->d_inode==NULL\n");
} else
DPRINTK("ncpfs: s_root==NULL\n");
} else {
sr.volNumber = -1;
sr.namespace = 0;
sr.dirEntNum = 0;
}
if (copy_to_user(argp, &sr, sizeof(sr)))
return -EFAULT;
return 0;
}
case NCP_IOC_SETROOT:
{
struct ncp_setroot_ioctl sr;
__u32 vnum;
__le32 de;
__le32 dosde;
struct dentry* dentry;
if (!capable(CAP_SYS_ADMIN))
{
return -EACCES;
}
if (server->root_setuped) return -EBUSY;
if (copy_from_user(&sr, argp, sizeof(sr)))
return -EFAULT;
if (sr.volNumber < 0) {
server->m.mounted_vol[0] = 0;
vnum = NCP_NUMBER_OF_VOLUMES;
de = 0;
dosde = 0;
} else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
return -EINVAL;
} else if (ncp_mount_subdir(server, sr.volNumber,
sr.namespace, sr.dirEntNum,
&vnum, &de, &dosde)) {
return -ENOENT;
}
dentry = inode->i_sb->s_root;
server->root_setuped = 1;
if (dentry) {
struct inode* inode = dentry->d_inode;
if (inode) {
NCP_FINFO(inode)->volNumber = vnum;
NCP_FINFO(inode)->dirEntNum = de;
NCP_FINFO(inode)->DosDirNum = dosde;
} else
DPRINTK("ncpfs: s_root->d_inode==NULL\n");
} else
DPRINTK("ncpfs: s_root==NULL\n");
return 0;
}
#ifdef CONFIG_NCPFS_PACKET_SIGNING
case NCP_IOC_SIGN_INIT:
if ((file_permission(filp, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid))
{
return -EACCES;
}
if (argp) {
if (server->sign_wanted)
{
struct ncp_sign_init sign;
if (copy_from_user(&sign, argp, sizeof(sign)))
return -EFAULT;
memcpy(server->sign_root,sign.sign_root,8);
memcpy(server->sign_last,sign.sign_last,16);
server->sign_active = 1;
}
/* ignore when signatures not wanted */
} else {
server->sign_active = 0;
}
return 0;
case NCP_IOC_SIGN_WANTED:
if ((file_permission(filp, MAY_READ) != 0)
&& (current->uid != server->m.mounted_uid))
{
return -EACCES;
}
if (put_user(server->sign_wanted, (int __user *)argp))
return -EFAULT;
return 0;
case NCP_IOC_SET_SIGN_WANTED:
{
int newstate;
if ((file_permission(filp, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid))
{
return -EACCES;
}
/* get only low 8 bits... */
if (get_user(newstate, (unsigned char __user *)argp))
return -EFAULT;
if (server->sign_active) {
/* cannot turn signatures OFF when active */
if (!newstate) return -EINVAL;
} else {
server->sign_wanted = newstate != 0;
}
return 0;
}
#endif /* CONFIG_NCPFS_PACKET_SIGNING */
#ifdef CONFIG_NCPFS_IOCTL_LOCKING
case NCP_IOC_LOCKUNLOCK:
if ((file_permission(filp, MAY_WRITE) != 0)
&& (current->uid != server->m.mounted_uid))
{
return -EACCES;
}
{
struct ncp_lock_ioctl rqdata;
int result;
if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
return -EFAULT;
if (rqdata.origin != 0)
return -EINVAL;
/* check for cmd */
switch (rqdata.cmd) {
case NCP_LOCK_EX:
case NCP_LOCK_SH:
if (rqdata.timeout == 0)
rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
break;
case NCP_LOCK_LOG:
rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; /* has no effect */
case NCP_LOCK_CLEAR:
break;
default:
return -EINVAL;
}
/* locking needs both read and write access */
if ((result = ncp_make_open(inode, O_RDWR)) != 0)
{
return result;
}
result = -EIO;
if (!ncp_conn_valid(server))
goto outrel;
result = -EISDIR;
if (!S_ISREG(inode->i_mode))
goto outrel;
if (rqdata.cmd == NCP_LOCK_CLEAR)
{
result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
NCP_FINFO(inode)->file_handle,
rqdata.offset,
rqdata.length);
if (result > 0) result = 0; /* no such lock */
}
else
{
int lockcmd;
switch (rqdata.cmd)
{
case NCP_LOCK_EX: lockcmd=1; break;
case NCP_LOCK_SH: lockcmd=3; break;
default: lockcmd=0; break;
}
result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
NCP_FINFO(inode)->file_handle,
lockcmd,
rqdata.offset,
rqdata.length,
rqdata.timeout);
if (result > 0) result = -EAGAIN;
}
outrel:
ncp_inode_close(inode);
return result;
}
#endif /* CONFIG_NCPFS_IOCTL_LOCKING */
#ifdef CONFIG_COMPAT
case NCP_IOC_GETOBJECTNAME_32:
if (current->uid != server->m.mounted_uid) {
return -EACCES;
}
{
struct compat_ncp_objectname_ioctl user;
size_t outl;
if (copy_from_user(&user, argp, sizeof(user)))
return -EFAULT;
user.auth_type = server->auth.auth_type;
outl = user.object_name_len;
user.object_name_len = server->auth.object_name_len;
if (outl > user.object_name_len)
outl = user.object_name_len;
if (outl) {
if (copy_to_user(compat_ptr(user.object_name),
server->auth.object_name,
outl)) return -EFAULT;
}
if (copy_to_user(argp, &user, sizeof(user)))
return -EFAULT;
return 0;
}
#endif
case NCP_IOC_GETOBJECTNAME:
if (current->uid != server->m.mounted_uid) {
return -EACCES;
}
{
struct ncp_objectname_ioctl user;
size_t outl;
if (copy_from_user(&user, argp, sizeof(user)))
return -EFAULT;
user.auth_type = server->auth.auth_type;
outl = user.object_name_len;
user.object_name_len = server->auth.object_name_len;
if (outl > user.object_name_len)
outl = user.object_name_len;
if (outl) {
if (copy_to_user(user.object_name,
server->auth.object_name,
outl)) return -EFAULT;
}
if (copy_to_user(argp, &user, sizeof(user)))
return -EFAULT;
return 0;
}
#ifdef CONFIG_COMPAT
case NCP_IOC_SETOBJECTNAME_32:
#endif
case NCP_IOC_SETOBJECTNAME:
if (current->uid != server->m.mounted_uid) {
return -EACCES;
}
{
struct ncp_objectname_ioctl user;
void* newname;
void* oldname;
size_t oldnamelen;
void* oldprivate;
size_t oldprivatelen;
#ifdef CONFIG_COMPAT
if (cmd == NCP_IOC_SETOBJECTNAME_32) {
struct compat_ncp_objectname_ioctl user32;
if (copy_from_user(&user32, argp, sizeof(user32)))
return -EFAULT;
user.auth_type = user32.auth_type;
user.object_name_len = user32.object_name_len;
user.object_name = compat_ptr(user32.object_name);
} else
#endif
if (copy_from_user(&user, argp, sizeof(user)))
return -EFAULT;
if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
return -ENOMEM;
if (user.object_name_len) {
newname = kmalloc(user.object_name_len, GFP_USER);
if (!newname)
return -ENOMEM;
if (copy_from_user(newname, user.object_name, user.object_name_len)) {
kfree(newname);
return -EFAULT;
}
} else {
newname = NULL;
}
/* enter critical section */
/* maybe that kfree can sleep so do that this way */
/* it is at least more SMP friendly (in future...) */
oldname = server->auth.object_name;
oldnamelen = server->auth.object_name_len;
oldprivate = server->priv.data;
oldprivatelen = server->priv.len;
server->auth.auth_type = user.auth_type;
server->auth.object_name_len = user.object_name_len;
server->auth.object_name = newname;
server->priv.len = 0;
server->priv.data = NULL;
/* leave critical section */
kfree(oldprivate);
kfree(oldname);
return 0;
}
#ifdef CONFIG_COMPAT
case NCP_IOC_GETPRIVATEDATA_32:
#endif
case NCP_IOC_GETPRIVATEDATA:
if (current->uid != server->m.mounted_uid) {
return -EACCES;
}
{
struct ncp_privatedata_ioctl user;
size_t outl;
#ifdef CONFIG_COMPAT
if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
struct compat_ncp_privatedata_ioctl user32;
if (copy_from_user(&user32, argp, sizeof(user32)))
return -EFAULT;
user.len = user32.len;
user.data = compat_ptr(user32.data);
} else
#endif
if (copy_from_user(&user, argp, sizeof(user)))
return -EFAULT;
outl = user.len;
user.len = server->priv.len;
if (outl > user.len) outl = user.len;
if (outl) {
if (copy_to_user(user.data,
server->priv.data,
outl)) return -EFAULT;
}
#ifdef CONFIG_COMPAT
if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
struct compat_ncp_privatedata_ioctl user32;
user32.len = user.len;
user32.data = (unsigned long) user.data;
if (copy_to_user(&user32, argp, sizeof(user32)))
return -EFAULT;
} else
#endif
if (copy_to_user(argp, &user, sizeof(user)))
return -EFAULT;
return 0;
}
#ifdef CONFIG_COMPAT
case NCP_IOC_SETPRIVATEDATA_32:
#endif
case NCP_IOC_SETPRIVATEDATA:
if (current->uid != server->m.mounted_uid) {
return -EACCES;
}
{
struct ncp_privatedata_ioctl user;
void* new;
void* old;
size_t oldlen;
#ifdef CONFIG_COMPAT
if (cmd == NCP_IOC_SETPRIVATEDATA_32) {
struct compat_ncp_privatedata_ioctl user32;
if (copy_from_user(&user32, argp, sizeof(user32)))
return -EFAULT;
user.len = user32.len;
user.data = compat_ptr(user32.data);
} else
#endif
if (copy_from_user(&user, argp, sizeof(user)))
return -EFAULT;
if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
return -ENOMEM;
if (user.len) {
new = kmalloc(user.len, GFP_USER);
if (!new)
return -ENOMEM;
if (copy_from_user(new, user.data, user.len)) {
kfree(new);
return -EFAULT;
}
} else {
new = NULL;
}
/* enter critical section */
old = server->priv.data;
oldlen = server->priv.len;
server->priv.len = user.len;
server->priv.data = new;
/* leave critical section */
kfree(old);
return 0;
}
#ifdef CONFIG_NCPFS_NLS
case NCP_IOC_SETCHARSETS:
return ncp_set_charsets(server, argp);
case NCP_IOC_GETCHARSETS:
return ncp_get_charsets(server, argp);
#endif /* CONFIG_NCPFS_NLS */
case NCP_IOC_SETDENTRYTTL:
if ((file_permission(filp, MAY_WRITE) != 0) &&
(current->uid != server->m.mounted_uid))
return -EACCES;
{
u_int32_t user;
if (copy_from_user(&user, argp, sizeof(user)))
return -EFAULT;
/* 20 secs at most... */
if (user > 20000)
return -EINVAL;
user = (user * HZ) / 1000;
server->dentry_ttl = user;
return 0;
}
case NCP_IOC_GETDENTRYTTL:
{
u_int32_t user = (server->dentry_ttl * 1000) / HZ;
if (copy_to_user(argp, &user, sizeof(user)))
return -EFAULT;
return 0;
}
}
return -EINVAL;
}
#ifdef CONFIG_COMPAT
long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file->f_dentry->d_inode;
int ret;
lock_kernel();
arg = (unsigned long) compat_ptr(arg);
ret = ncp_ioctl(inode, file, cmd, arg);
unlock_kernel();
return ret;
}
#endif
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