diff options
Diffstat (limited to 'fs/ncpfs/ioctl.c')
| -rw-r--r-- | fs/ncpfs/ioctl.c | 649 |
1 files changed, 649 insertions, 0 deletions
diff --git a/fs/ncpfs/ioctl.c b/fs/ncpfs/ioctl.c new file mode 100644 index 000000000000..88df79356a1f --- /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; +} |