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-rw-r--r--fs/ncpfs/ioctl.c649
1 files changed, 649 insertions, 0 deletions
diff --git a/fs/ncpfs/ioctl.c b/fs/ncpfs/ioctl.c
new file mode 100644
index 0000000..88df793
--- /dev/null
+++ b/fs/ncpfs/ioctl.c
@@ -0,0 +1,649 @@
+/*
+ * 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/config.h>
+
+#include <asm/uaccess.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/vmalloc.h>
+
+#include <linux/ncp_fs.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 inode* inode, struct ncp_fs_info __user *arg)
+{
+ struct ncp_fs_info info;
+
+ if ((permission(inode, MAY_WRITE, NULL) != 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 inode* inode, struct ncp_fs_info_v2 __user * arg)
+{
+ struct ncp_fs_info_v2 info2;
+
+ if ((permission(inode, MAY_WRITE, NULL) != 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_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) {
+ case NCP_IOC_NCPREQUEST:
+
+ if ((permission(inode, MAY_WRITE, NULL) != 0)
+ && (current->uid != server->m.mounted_uid)) {
+ return -EACCES;
+ }
+ 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, inode, argp);
+
+ case NCP_IOC_GET_FS_INFO_V2:
+ return ncp_get_fs_info_v2(server, inode, argp);
+
+ case NCP_IOC_GETMOUNTUID2:
+ {
+ unsigned long tmp = server->m.mounted_uid;
+
+ if ( (permission(inode, MAY_READ, NULL) != 0)
+ && (current->uid != server->m.mounted_uid))
+ {
+ return -EACCES;
+ }
+ if (put_user(tmp, (unsigned long __user *)argp))
+ return -EFAULT;
+ return 0;
+ }
+
+ case NCP_IOC_GETROOT:
+ {
+ struct ncp_setroot_ioctl sr;
+
+ if ( (permission(inode, MAY_READ, NULL) != 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 ((permission(inode, MAY_WRITE, NULL) != 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 ( (permission(inode, MAY_READ, NULL) != 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 ( (permission(inode, MAY_WRITE, NULL) != 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 ( (permission(inode, MAY_WRITE, NULL) != 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 */
+
+ 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;
+ }
+ 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;
+
+ 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 = ncp_kmalloc(user.object_name_len, GFP_USER);
+ if (!newname) return -ENOMEM;
+ if (copy_from_user(newname, user.object_name, user.object_name_len)) {
+ ncp_kfree_s(newname, user.object_name_len);
+ 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 */
+ if (oldprivate) ncp_kfree_s(oldprivate, oldprivatelen);
+ if (oldname) ncp_kfree_s(oldname, oldnamelen);
+ return 0;
+ }
+ case NCP_IOC_GETPRIVATEDATA:
+ if (current->uid != server->m.mounted_uid) {
+ return -EACCES;
+ }
+ {
+ struct ncp_privatedata_ioctl user;
+ size_t outl;
+
+ 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;
+ }
+ if (copy_to_user(argp, &user, sizeof(user)))
+ return -EFAULT;
+ return 0;
+ }
+ 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;
+
+ if (copy_from_user(&user, argp, sizeof(user)))
+ return -EFAULT;
+ if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
+ return -ENOMEM;
+ if (user.len) {
+ new = ncp_kmalloc(user.len, GFP_USER);
+ if (!new) return -ENOMEM;
+ if (copy_from_user(new, user.data, user.len)) {
+ ncp_kfree_s(new, user.len);
+ 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 */
+ if (old) ncp_kfree_s(old, oldlen);
+ 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 ((permission(inode, MAY_WRITE, NULL) != 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;
+ }
+
+ }
+/* #ifdef CONFIG_UID16 */
+ /* NCP_IOC_GETMOUNTUID may be same as NCP_IOC_GETMOUNTUID2,
+ so we have this out of switch */
+ if (cmd == NCP_IOC_GETMOUNTUID) {
+ __kernel_uid_t uid = 0;
+ if ((permission(inode, MAY_READ, NULL) != 0)
+ && (current->uid != server->m.mounted_uid)) {
+ return -EACCES;
+ }
+ SET_UID(uid, server->m.mounted_uid);
+ if (put_user(uid, (__kernel_uid_t __user *)argp))
+ return -EFAULT;
+ return 0;
+ }
+/* #endif */
+ return -EINVAL;
+}
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