/* * proc.c * * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke * Copyright (C) 1997 by Volker Lendecke * * Please add a note about your changes to smbfs in the ChangeLog file. */ #include <linux/types.h> #include <linux/capability.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/fs.h> #include <linux/file.h> #include <linux/stat.h> #include <linux/fcntl.h> #include <linux/dcache.h> #include <linux/dirent.h> #include <linux/nls.h> #include <linux/smp_lock.h> #include <linux/net.h> #include <linux/vfs.h> #include <linux/smb_fs.h> #include <linux/smbno.h> #include <linux/smb_mount.h> #include <net/sock.h> #include <asm/string.h> #include <asm/div64.h> #include "smb_debug.h" #include "proto.h" #include "request.h" /* Features. Undefine if they cause problems, this should perhaps be a config option. */ #define SMBFS_POSIX_UNLINK 1 /* Allow smb_retry to be interrupted. */ #define SMB_RETRY_INTR #define SMB_VWV(packet) ((packet) + SMB_HEADER_LEN) #define SMB_CMD(packet) (*(packet+8)) #define SMB_WCT(packet) (*(packet+SMB_HEADER_LEN - 1)) #define SMB_DIRINFO_SIZE 43 #define SMB_STATUS_SIZE 21 #define SMB_ST_BLKSIZE (PAGE_SIZE) #define SMB_ST_BLKSHIFT (PAGE_SHIFT) static struct smb_ops smb_ops_core; static struct smb_ops smb_ops_os2; static struct smb_ops smb_ops_win95; static struct smb_ops smb_ops_winNT; static struct smb_ops smb_ops_unix; static struct smb_ops smb_ops_null; static void smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr); static void smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr); static int smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir, struct smb_fattr *fattr); static int smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry, struct smb_fattr *fattr); static int smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry, u16 attr); static int smb_proc_setattr_ext(struct smb_sb_info *server, struct inode *inode, struct smb_fattr *fattr); static int smb_proc_query_cifsunix(struct smb_sb_info *server); static void install_ops(struct smb_ops *dst, struct smb_ops *src); static void str_upper(char *name, int len) { while (len--) { if (*name >= 'a' && *name <= 'z') *name -= ('a' - 'A'); name++; } } #if 0 static void str_lower(char *name, int len) { while (len--) { if (*name >= 'A' && *name <= 'Z') *name += ('a' - 'A'); name++; } } #endif /* reverse a string inline. This is used by the dircache walking routines */ static void reverse_string(char *buf, int len) { char c; char *end = buf+len-1; while(buf < end) { c = *buf; *(buf++) = *end; *(end--) = c; } } /* no conversion, just a wrapper for memcpy. */ static int convert_memcpy(unsigned char *output, int olen, const unsigned char *input, int ilen, struct nls_table *nls_from, struct nls_table *nls_to) { if (olen < ilen) return -ENAMETOOLONG; memcpy(output, input, ilen); return ilen; } static inline int write_char(unsigned char ch, char *output, int olen) { if (olen < 4) return -ENAMETOOLONG; sprintf(output, ":x%02x", ch); return 4; } static inline int write_unichar(wchar_t ch, char *output, int olen) { if (olen < 5) return -ENAMETOOLONG; sprintf(output, ":%04x", ch); return 5; } /* convert from one "codepage" to another (possibly being utf8). */ static int convert_cp(unsigned char *output, int olen, const unsigned char *input, int ilen, struct nls_table *nls_from, struct nls_table *nls_to) { int len = 0; int n; wchar_t ch; while (ilen > 0) { /* convert by changing to unicode and back to the new cp */ n = nls_from->char2uni(input, ilen, &ch); if (n == -EINVAL) { ilen--; n = write_char(*input++, output, olen); if (n < 0) goto fail; output += n; olen -= n; len += n; continue; } else if (n < 0) goto fail; input += n; ilen -= n; n = nls_to->uni2char(ch, output, olen); if (n == -EINVAL) n = write_unichar(ch, output, olen); if (n < 0) goto fail; output += n; olen -= n; len += n; } return len; fail: return n; } /* ----------------------------------------------------------- */ /* * nls_unicode * * This encodes/decodes little endian unicode format */ static int uni2char(wchar_t uni, unsigned char *out, int boundlen) { if (boundlen < 2) return -EINVAL; *out++ = uni & 0xff; *out++ = uni >> 8; return 2; } static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni) { if (boundlen < 2) return -EINVAL; *uni = (rawstring[1] << 8) | rawstring[0]; return 2; } static struct nls_table unicode_table = { .charset = "unicode", .uni2char = uni2char, .char2uni = char2uni, }; /* ----------------------------------------------------------- */ static int setcodepage(struct nls_table **p, char *name) { struct nls_table *nls; if (!name || !*name) { nls = NULL; } else if ( (nls = load_nls(name)) == NULL) { printk (KERN_ERR "smbfs: failed to load nls '%s'\n", name); return -EINVAL; } /* if already set, unload the previous one. */ if (*p && *p != &unicode_table) unload_nls(*p); *p = nls; return 0; } /* Handles all changes to codepage settings. */ int smb_setcodepage(struct smb_sb_info *server, struct smb_nls_codepage *cp) { int n = 0; smb_lock_server(server); /* Don't load any nls_* at all, if no remote is requested */ if (!*cp->remote_name) goto out; /* local */ n = setcodepage(&server->local_nls, cp->local_name); if (n != 0) goto out; /* remote */ if (!strcmp(cp->remote_name, "unicode")) { server->remote_nls = &unicode_table; } else { n = setcodepage(&server->remote_nls, cp->remote_name); if (n != 0) setcodepage(&server->local_nls, NULL); } out: if (server->local_nls != NULL && server->remote_nls != NULL) server->ops->convert = convert_cp; else server->ops->convert = convert_memcpy; smb_unlock_server(server); return n; } /*****************************************************************************/ /* */ /* Encoding/Decoding section */ /* */ /*****************************************************************************/ static __u8 * smb_encode_smb_length(__u8 * p, __u32 len) { *p = 0; *(p+1) = 0; *(p+2) = (len & 0xFF00) >> 8; *(p+3) = (len & 0xFF); if (len > 0xFFFF) { *(p+1) = 1; } return p + 4; } /* * smb_build_path: build the path to entry and name storing it in buf. * The path returned will have the trailing '\0'. */ static int smb_build_path(struct smb_sb_info *server, unsigned char *buf, int maxlen, struct dentry *entry, struct qstr *name) { unsigned char *path = buf; int len; int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE) != 0; if (maxlen < (2<<unicode)) return -ENAMETOOLONG; if (maxlen > SMB_MAXPATHLEN + 1) maxlen = SMB_MAXPATHLEN + 1; if (entry == NULL) goto test_name_and_out; /* * If IS_ROOT, we have to do no walking at all. */ if (IS_ROOT(entry) && !name) { *path++ = '\\'; if (unicode) *path++ = '\0'; *path++ = '\0'; if (unicode) *path++ = '\0'; return path-buf; } /* * Build the path string walking the tree backward from end to ROOT * and store it in reversed order [see reverse_string()] */ dget(entry); spin_lock(&entry->d_lock); while (!IS_ROOT(entry)) { struct dentry *parent; if (maxlen < (3<<unicode)) { spin_unlock(&entry->d_lock); dput(entry); return -ENAMETOOLONG; } len = server->ops->convert(path, maxlen-2, entry->d_name.name, entry->d_name.len, server->local_nls, server->remote_nls); if (len < 0) { spin_unlock(&entry->d_lock); dput(entry); return len; } reverse_string(path, len); path += len; if (unicode) { /* Note: reverse order */ *path++ = '\0'; maxlen--; } *path++ = '\\'; maxlen -= len+1; parent = entry->d_parent; dget(parent); spin_unlock(&entry->d_lock); dput(entry); entry = parent; spin_lock(&entry->d_lock); } spin_unlock(&entry->d_lock); dput(entry); reverse_string(buf, path-buf); /* maxlen has space for at least one char */ test_name_and_out: if (name) { if (maxlen < (3<<unicode)) return -ENAMETOOLONG; *path++ = '\\'; if (unicode) { *path++ = '\0'; maxlen--; } len = server->ops->convert(path, maxlen-2, name->name, name->len, server->local_nls, server->remote_nls); if (len < 0) return len; path += len; maxlen -= len+1; } /* maxlen has space for at least one char */ *path++ = '\0'; if (unicode) *path++ = '\0'; return path-buf; } static int smb_encode_path(struct smb_sb_info *server, char *buf, int maxlen, struct dentry *dir, struct qstr *name) { int result; result = smb_build_path(server, buf, maxlen, dir, name); if (result < 0) goto out; if (server->opt.protocol <= SMB_PROTOCOL_COREPLUS) str_upper(buf, result); out: return result; } /* encode_path for non-trans2 request SMBs */ static int smb_simple_encode_path(struct smb_request *req, char **p, struct dentry * entry, struct qstr * name) { struct smb_sb_info *server = req->rq_server; char *s = *p; int res; int maxlen = ((char *)req->rq_buffer + req->rq_bufsize) - s; int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE); if (!maxlen) return -ENAMETOOLONG; *s++ = 4; /* ASCII data format */ /* * SMB Unicode strings must be 16bit aligned relative the start of the * packet. If they are not they must be padded with 0. */ if (unicode) { int align = s - (char *)req->rq_buffer; if (!(align & 1)) { *s++ = '\0'; maxlen--; } } res = smb_encode_path(server, s, maxlen-1, entry, name); if (res < 0) return res; *p = s + res; return 0; } /* The following are taken directly from msdos-fs */ /* Linear day numbers of the respective 1sts in non-leap years. */ static int day_n[] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */ static time_t utc2local(struct smb_sb_info *server, time_t time) { return time - server->opt.serverzone*60; } static time_t local2utc(struct smb_sb_info *server, time_t time) { return time + server->opt.serverzone*60; } /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ static time_t date_dos2unix(struct smb_sb_info *server, __u16 date, __u16 time) { int month, year; time_t secs; /* first subtract and mask after that... Otherwise, if date == 0, bad things happen */ month = ((date >> 5) - 1) & 15; year = date >> 9; secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653); /* days since 1.1.70 plus 80's leap day */ return local2utc(server, secs); } /* Convert linear UNIX date to a MS-DOS time/date pair. */ static void date_unix2dos(struct smb_sb_info *server, int unix_date, __u16 *date, __u16 *time) { int day, year, nl_day, month; unix_date = utc2local(server, unix_date); if (unix_date < 315532800) unix_date = 315532800; *time = (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) + (((unix_date / 3600) % 24) << 11); day = unix_date / 86400 - 3652; year = day / 365; if ((year + 3) / 4 + 365 * year > day) year--; day -= (year + 3) / 4 + 365 * year; if (day == 59 && !(year & 3)) { nl_day = day; month = 2; } else { nl_day = (year & 3) || day <= 59 ? day : day - 1; for (month = 0; month < 12; month++) if (day_n[month] > nl_day) break; } *date = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9); } /* The following are taken from fs/ntfs/util.c */ #define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000) /* * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units) * into Unix UTC (based 1970-01-01, in seconds). */ static struct timespec smb_ntutc2unixutc(u64 ntutc) { struct timespec ts; /* FIXME: what about the timezone difference? */ /* Subtract the NTFS time offset, then convert to 1s intervals. */ u64 t = ntutc - NTFS_TIME_OFFSET; ts.tv_nsec = do_div(t, 10000000) * 100; ts.tv_sec = t; return ts; } /* Convert the Unix UTC into NT time */ static u64 smb_unixutc2ntutc(struct timespec ts) { /* Note: timezone conversion is probably wrong. */ /* return ((u64)utc2local(server, t)) * 10000000 + NTFS_TIME_OFFSET; */ return ((u64)ts.tv_sec) * 10000000 + ts.tv_nsec/100 + NTFS_TIME_OFFSET; } #define MAX_FILE_MODE 6 static mode_t file_mode[] = { S_IFREG, S_IFDIR, S_IFLNK, S_IFCHR, S_IFBLK, S_IFIFO, S_IFSOCK }; static int smb_filetype_to_mode(u32 filetype) { if (filetype > MAX_FILE_MODE) { PARANOIA("Filetype out of range: %d\n", filetype); return S_IFREG; } return file_mode[filetype]; } static u32 smb_filetype_from_mode(int mode) { if (S_ISREG(mode)) return UNIX_TYPE_FILE; if (S_ISDIR(mode)) return UNIX_TYPE_DIR; if (S_ISLNK(mode)) return UNIX_TYPE_SYMLINK; if (S_ISCHR(mode)) return UNIX_TYPE_CHARDEV; if (S_ISBLK(mode)) return UNIX_TYPE_BLKDEV; if (S_ISFIFO(mode)) return UNIX_TYPE_FIFO; if (S_ISSOCK(mode)) return UNIX_TYPE_SOCKET; return UNIX_TYPE_UNKNOWN; } /*****************************************************************************/ /* */ /* Support section. */ /* */ /*****************************************************************************/ __u32 smb_len(__u8 * p) { return ((*(p+1) & 0x1) << 16L) | (*(p+2) << 8L) | *(p+3); } static __u16 smb_bcc(__u8 * packet) { int pos = SMB_HEADER_LEN + SMB_WCT(packet) * sizeof(__u16); return WVAL(packet, pos); } /* smb_valid_packet: We check if packet fulfills the basic requirements of a smb packet */ static int smb_valid_packet(__u8 * packet) { return (packet[4] == 0xff && packet[5] == 'S' && packet[6] == 'M' && packet[7] == 'B' && (smb_len(packet) + 4 == SMB_HEADER_LEN + SMB_WCT(packet) * 2 + smb_bcc(packet))); } /* smb_verify: We check if we got the answer we expected, and if we got enough data. If bcc == -1, we don't care. */ static int smb_verify(__u8 * packet, int command, int wct, int bcc) { if (SMB_CMD(packet) != command) goto bad_command; if (SMB_WCT(packet) < wct) goto bad_wct; if (bcc != -1 && smb_bcc(packet) < bcc) goto bad_bcc; return 0; bad_command: printk(KERN_ERR "smb_verify: command=%x, SMB_CMD=%x??\n", command, SMB_CMD(packet)); goto fail; bad_wct: printk(KERN_ERR "smb_verify: command=%x, wct=%d, SMB_WCT=%d??\n", command, wct, SMB_WCT(packet)); goto fail; bad_bcc: printk(KERN_ERR "smb_verify: command=%x, bcc=%d, SMB_BCC=%d??\n", command, bcc, smb_bcc(packet)); fail: return -EIO; } /* * Returns the maximum read or write size for the "payload". Making all of the * packet fit within the negotiated max_xmit size. * * N.B. Since this value is usually computed before locking the server, * the server's packet size must never be decreased! */ static inline int smb_get_xmitsize(struct smb_sb_info *server, int overhead) { return server->opt.max_xmit - overhead; } /* * Calculate the maximum read size */ int smb_get_rsize(struct smb_sb_info *server) { /* readX has 12 parameters, read has 5 */ int overhead = SMB_HEADER_LEN + 12 * sizeof(__u16) + 2 + 1 + 2; int size = smb_get_xmitsize(server, overhead); VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size); return size; } /* * Calculate the maximum write size */ int smb_get_wsize(struct smb_sb_info *server) { /* writeX has 14 parameters, write has 5 */ int overhead = SMB_HEADER_LEN + 14 * sizeof(__u16) + 2 + 1 + 2; int size = smb_get_xmitsize(server, overhead); VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size); return size; } /* * Convert SMB error codes to -E... errno values. */ int smb_errno(struct smb_request *req) { int errcls = req->rq_rcls; int error = req->rq_err; char *class = "Unknown"; VERBOSE("errcls %d code %d from command 0x%x\n", errcls, error, SMB_CMD(req->rq_header)); if (errcls == ERRDOS) { switch (error) { case ERRbadfunc: return -EINVAL; case ERRbadfile: case ERRbadpath: return -ENOENT; case ERRnofids: return -EMFILE; case ERRnoaccess: return -EACCES; case ERRbadfid: return -EBADF; case ERRbadmcb: return -EREMOTEIO; case ERRnomem: return -ENOMEM; case ERRbadmem: return -EFAULT; case ERRbadenv: case ERRbadformat: return -EREMOTEIO; case ERRbadaccess: return -EACCES; case ERRbaddata: return -E2BIG; case ERRbaddrive: return -ENXIO; case ERRremcd: return -EREMOTEIO; case ERRdiffdevice: return -EXDEV; case ERRnofiles: return -ENOENT; case ERRbadshare: return -ETXTBSY; case ERRlock: return -EDEADLK; case ERRfilexists: return -EEXIST; case ERROR_INVALID_PARAMETER: return -EINVAL; case ERROR_DISK_FULL: return -ENOSPC; case ERROR_INVALID_NAME: return -ENOENT; case ERROR_DIR_NOT_EMPTY: return -ENOTEMPTY; case ERROR_NOT_LOCKED: return -ENOLCK; case ERROR_ALREADY_EXISTS: return -EEXIST; default: class = "ERRDOS"; goto err_unknown; } } else if (errcls == ERRSRV) { switch (error) { /* N.B. This is wrong ... EIO ? */ case ERRerror: return -ENFILE; case ERRbadpw: return -EINVAL; case ERRbadtype: case ERRtimeout: return -EIO; case ERRaccess: return -EACCES; /* * This is a fatal error, as it means the "tree ID" * for this connection is no longer valid. We map * to a special error code and get a new connection. */ case ERRinvnid: return -EBADSLT; default: class = "ERRSRV"; goto err_unknown; } } else if (errcls == ERRHRD) { switch (error) { case ERRnowrite: return -EROFS; case ERRbadunit: return -ENODEV; case ERRnotready: return -EUCLEAN; case ERRbadcmd: case ERRdata: return -EIO; case ERRbadreq: return -ERANGE; case ERRbadshare: return -ETXTBSY; case ERRlock: return -EDEADLK; case ERRdiskfull: return -ENOSPC; default: class = "ERRHRD"; goto err_unknown; } } else if (errcls == ERRCMD) { class = "ERRCMD"; } else if (errcls == SUCCESS) { return 0; /* This is the only valid 0 return */ } err_unknown: printk(KERN_ERR "smb_errno: class %s, code %d from command 0x%x\n", class, error, SMB_CMD(req->rq_header)); return -EIO; } /* smb_request_ok: We expect the server to be locked. Then we do the request and check the answer completely. When smb_request_ok returns 0, you can be quite sure that everything went well. When the answer is <=0, the returned number is a valid unix errno. */ static int smb_request_ok(struct smb_request *req, int command, int wct, int bcc) { int result; req->rq_resp_wct = wct; req->rq_resp_bcc = bcc; result = smb_add_request(req); if (result != 0) { DEBUG1("smb_request failed\n"); goto out; } if (smb_valid_packet(req->rq_header) != 0) { PARANOIA("invalid packet!\n"); goto out; } result = smb_verify(req->rq_header, command, wct, bcc); out: return result; } /* * This implements the NEWCONN ioctl. It installs the server pid, * sets server->state to CONN_VALID, and wakes up the waiting process. */ int smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt) { struct file *filp; struct sock *sk; int error; VERBOSE("fd=%d, pid=%d\n", opt->fd, current->pid); smb_lock_server(server); /* * Make sure we don't already have a valid connection ... */ error = -EINVAL; if (server->state == CONN_VALID) goto out; error = -EACCES; if (current->uid != server->mnt->mounted_uid && !capable(CAP_SYS_ADMIN)) goto out; error = -EBADF; filp = fget(opt->fd); if (!filp) goto out; if (!smb_valid_socket(filp->f_dentry->d_inode)) goto out_putf; server->sock_file = filp; server->conn_pid = current->pid; server->opt = *opt; server->generation += 1; server->state = CONN_VALID; error = 0; if (server->conn_error) { /* * conn_error is the returncode we originally decided to * drop the old connection on. This message should be positive * and not make people ask questions on why smbfs is printing * error messages ... */ printk(KERN_INFO "SMB connection re-established (%d)\n", server->conn_error); server->conn_error = 0; } /* * Store the server in sock user_data (Only used by sunrpc) */ sk = SOCKET_I(filp->f_dentry->d_inode)->sk; sk->sk_user_data = server; /* chain into the data_ready callback */ server->data_ready = xchg(&sk->sk_data_ready, smb_data_ready); /* check if we have an old smbmount that uses seconds for the serverzone */ if (server->opt.serverzone > 12*60 || server->opt.serverzone < -12*60) server->opt.serverzone /= 60; /* now that we have an established connection we can detect the server type and enable bug workarounds */ if (server->opt.protocol < SMB_PROTOCOL_LANMAN2) install_ops(server->ops, &smb_ops_core); else if (server->opt.protocol == SMB_PROTOCOL_LANMAN2) install_ops(server->ops, &smb_ops_os2); else if (server->opt.protocol == SMB_PROTOCOL_NT1 && (server->opt.max_xmit < 0x1000) && !(server->opt.capabilities & SMB_CAP_NT_SMBS)) { /* FIXME: can we kill the WIN95 flag now? */ server->mnt->flags |= SMB_MOUNT_WIN95; VERBOSE("detected WIN95 server\n"); install_ops(server->ops, &smb_ops_win95); } else { /* * Samba has max_xmit 65535 * NT4spX has max_xmit 4536 (or something like that) * win2k has ... */ VERBOSE("detected NT1 (Samba, NT4/5) server\n"); install_ops(server->ops, &smb_ops_winNT); } /* FIXME: the win9x code wants to modify these ... (seek/trunc bug) */ if (server->mnt->flags & SMB_MOUNT_OLDATTR) { server->ops->getattr = smb_proc_getattr_core; } else if (server->mnt->flags & SMB_MOUNT_DIRATTR) { server->ops->getattr = smb_proc_getattr_ff; } /* Decode server capabilities */ if (server->opt.capabilities & SMB_CAP_LARGE_FILES) { /* Should be ok to set this now, as no one can access the mount until the connection has been established. */ SB_of(server)->s_maxbytes = ~0ULL >> 1; VERBOSE("LFS enabled\n"); } if (server->opt.capabilities & SMB_CAP_UNICODE) { server->mnt->flags |= SMB_MOUNT_UNICODE; VERBOSE("Unicode enabled\n"); } else { server->mnt->flags &= ~SMB_MOUNT_UNICODE; } #if 0 /* flags we may test for other patches ... */ if (server->opt.capabilities & SMB_CAP_LARGE_READX) { VERBOSE("Large reads enabled\n"); } if (server->opt.capabilities & SMB_CAP_LARGE_WRITEX) { VERBOSE("Large writes enabled\n"); } #endif if (server->opt.capabilities & SMB_CAP_UNIX) { struct inode *inode; VERBOSE("Using UNIX CIFS extensions\n"); install_ops(server->ops, &smb_ops_unix); inode = SB_of(server)->s_root->d_inode; if (inode) inode->i_op = &smb_dir_inode_operations_unix; } VERBOSE("protocol=%d, max_xmit=%d, pid=%d capabilities=0x%x\n", server->opt.protocol, server->opt.max_xmit, server->conn_pid, server->opt.capabilities); /* FIXME: this really should be done by smbmount. */ if (server->opt.max_xmit > SMB_MAX_PACKET_SIZE) { server->opt.max_xmit = SMB_MAX_PACKET_SIZE; } smb_unlock_server(server); smbiod_wake_up(); if (server->opt.capabilities & SMB_CAP_UNIX) smb_proc_query_cifsunix(server); server->conn_complete++; wake_up_interruptible_all(&server->conn_wq); return error; out: smb_unlock_server(server); smbiod_wake_up(); return error; out_putf: fput(filp); goto out; } /* smb_setup_header: We completely set up the packet. You only have to insert the command-specific fields */ __u8 * smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc) { __u32 xmit_len = SMB_HEADER_LEN + wct * sizeof(__u16) + bcc + 2; __u8 *p = req->rq_header; struct smb_sb_info *server = req->rq_server; p = smb_encode_smb_length(p, xmit_len - 4); *p++ = 0xff; *p++ = 'S'; *p++ = 'M'; *p++ = 'B'; *p++ = command; memset(p, '\0', 19); p += 19; p += 8; if (server->opt.protocol > SMB_PROTOCOL_CORE) { int flags = SMB_FLAGS_CASELESS_PATHNAMES; int flags2 = SMB_FLAGS2_LONG_PATH_COMPONENTS | SMB_FLAGS2_EXTENDED_ATTRIBUTES; /* EA? not really ... */ *(req->rq_header + smb_flg) = flags; if (server->mnt->flags & SMB_MOUNT_UNICODE) flags2 |= SMB_FLAGS2_UNICODE_STRINGS; WSET(req->rq_header, smb_flg2, flags2); } *p++ = wct; /* wct */ p += 2 * wct; WSET(p, 0, bcc); /* Include the header in the data to send */ req->rq_iovlen = 1; req->rq_iov[0].iov_base = req->rq_header; req->rq_iov[0].iov_len = xmit_len - bcc; return req->rq_buffer; } static void smb_setup_bcc(struct smb_request *req, __u8 *p) { u16 bcc = p - req->rq_buffer; u8 *pbcc = req->rq_header + SMB_HEADER_LEN + 2*SMB_WCT(req->rq_header); WSET(pbcc, 0, bcc); smb_encode_smb_length(req->rq_header, SMB_HEADER_LEN + 2*SMB_WCT(req->rq_header) - 2 + bcc); /* Include the "bytes" in the data to send */ req->rq_iovlen = 2; req->rq_iov[1].iov_base = req->rq_buffer; req->rq_iov[1].iov_len = bcc; } static int smb_proc_seek(struct smb_sb_info *server, __u16 fileid, __u16 mode, off_t offset) { int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, 0))) goto out; smb_setup_header(req, SMBlseek, 4, 0); WSET(req->rq_header, smb_vwv0, fileid); WSET(req->rq_header, smb_vwv1, mode); DSET(req->rq_header, smb_vwv2, offset); req->rq_flags |= SMB_REQ_NORETRY; result = smb_request_ok(req, SMBlseek, 2, 0); if (result < 0) { result = 0; goto out_free; } result = DVAL(req->rq_header, smb_vwv0); out_free: smb_rput(req); out: return result; } static int smb_proc_open(struct smb_sb_info *server, struct dentry *dentry, int wish) { struct inode *ino = dentry->d_inode; struct smb_inode_info *ei = SMB_I(ino); int mode, read_write = 0x42, read_only = 0x40; int res; char *p; struct smb_request *req; /* * Attempt to open r/w, unless there are no write privileges. */ mode = read_write; if (!(ino->i_mode & (S_IWUSR | S_IWGRP | S_IWOTH))) mode = read_only; #if 0 /* FIXME: why is this code not in? below we fix it so that a caller wanting RO doesn't get RW. smb_revalidate_inode does some optimization based on access mode. tail -f needs it to be correct. We must open rw since we don't do the open if called a second time with different 'wish'. Is that not supported by smb servers? */ if (!(wish & (O_WRONLY | O_RDWR))) mode = read_only; #endif res = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; retry: p = smb_setup_header(req, SMBopen, 2, 0); WSET(req->rq_header, smb_vwv0, mode); WSET(req->rq_header, smb_vwv1, aSYSTEM | aHIDDEN | aDIR); res = smb_simple_encode_path(req, &p, dentry, NULL); if (res < 0) goto out_free; smb_setup_bcc(req, p); res = smb_request_ok(req, SMBopen, 7, 0); if (res != 0) { if (mode == read_write && (res == -EACCES || res == -ETXTBSY || res == -EROFS)) { VERBOSE("%s/%s R/W failed, error=%d, retrying R/O\n", DENTRY_PATH(dentry), res); mode = read_only; req->rq_flags = 0; goto retry; } goto out_free; } /* We should now have data in vwv[0..6]. */ ei->fileid = WVAL(req->rq_header, smb_vwv0); ei->attr = WVAL(req->rq_header, smb_vwv1); /* smb_vwv2 has mtime */ /* smb_vwv4 has size */ ei->access = (WVAL(req->rq_header, smb_vwv6) & SMB_ACCMASK); ei->open = server->generation; out_free: smb_rput(req); out: return res; } /* * Make sure the file is open, and check that the access * is compatible with the desired access. */ int smb_open(struct dentry *dentry, int wish) { struct inode *inode = dentry->d_inode; int result; __u16 access; result = -ENOENT; if (!inode) { printk(KERN_ERR "smb_open: no inode for dentry %s/%s\n", DENTRY_PATH(dentry)); goto out; } if (!smb_is_open(inode)) { struct smb_sb_info *server = server_from_inode(inode); result = 0; if (!smb_is_open(inode)) result = smb_proc_open(server, dentry, wish); if (result) goto out; /* * A successful open means the path is still valid ... */ smb_renew_times(dentry); } /* * Check whether the access is compatible with the desired mode. */ result = 0; access = SMB_I(inode)->access; if (access != wish && access != SMB_O_RDWR) { PARANOIA("%s/%s access denied, access=%x, wish=%x\n", DENTRY_PATH(dentry), access, wish); result = -EACCES; } out: return result; } static int smb_proc_close(struct smb_sb_info *server, __u16 fileid, __u32 mtime) { struct smb_request *req; int result = -ENOMEM; if (! (req = smb_alloc_request(server, 0))) goto out; smb_setup_header(req, SMBclose, 3, 0); WSET(req->rq_header, smb_vwv0, fileid); DSET(req->rq_header, smb_vwv1, utc2local(server, mtime)); req->rq_flags |= SMB_REQ_NORETRY; result = smb_request_ok(req, SMBclose, 0, 0); smb_rput(req); out: return result; } /* * Win NT 4.0 has an apparent bug in that it fails to update the * modify time when writing to a file. As a workaround, we update * both modify and access time locally, and post the times to the * server when closing the file. */ static int smb_proc_close_inode(struct smb_sb_info *server, struct inode * ino) { struct smb_inode_info *ei = SMB_I(ino); int result = 0; if (smb_is_open(ino)) { /* * We clear the open flag in advance, in case another * process observes the value while we block below. */ ei->open = 0; /* * Kludge alert: SMB timestamps are accurate only to * two seconds ... round the times to avoid needless * cache invalidations! */ if (ino->i_mtime.tv_sec & 1) { ino->i_mtime.tv_sec--; ino->i_mtime.tv_nsec = 0; } if (ino->i_atime.tv_sec & 1) { ino->i_atime.tv_sec--; ino->i_atime.tv_nsec = 0; } /* * If the file is open with write permissions, * update the time stamps to sync mtime and atime. */ if ((server->opt.capabilities & SMB_CAP_UNIX) == 0 && (server->opt.protocol >= SMB_PROTOCOL_LANMAN2) && !(ei->access == SMB_O_RDONLY)) { struct smb_fattr fattr; smb_get_inode_attr(ino, &fattr); smb_proc_setattr_ext(server, ino, &fattr); } result = smb_proc_close(server, ei->fileid, ino->i_mtime.tv_sec); /* * Force a revalidation after closing ... some servers * don't post the size until the file has been closed. */ if (server->opt.protocol < SMB_PROTOCOL_NT1) ei->oldmtime = 0; ei->closed = jiffies; } return result; } int smb_close(struct inode *ino) { int result = 0; if (smb_is_open(ino)) { struct smb_sb_info *server = server_from_inode(ino); result = smb_proc_close_inode(server, ino); } return result; } /* * This is used to close a file following a failed instantiate. * Since we don't have an inode, we can't use any of the above. */ int smb_close_fileid(struct dentry *dentry, __u16 fileid) { struct smb_sb_info *server = server_from_dentry(dentry); int result; result = smb_proc_close(server, fileid, get_seconds()); return result; } /* In smb_proc_read and smb_proc_write we do not retry, because the file-id would not be valid after a reconnection. */ static void smb_proc_read_data(struct smb_request *req) { req->rq_iov[0].iov_base = req->rq_buffer; req->rq_iov[0].iov_len = 3; req->rq_iov[1].iov_base = req->rq_page; req->rq_iov[1].iov_len = req->rq_rsize; req->rq_iovlen = 2; req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd; } static int smb_proc_read(struct inode *inode, loff_t offset, int count, char *data) { struct smb_sb_info *server = server_from_inode(inode); __u16 returned_count, data_len; unsigned char *buf; int result; struct smb_request *req; u8 rbuf[4]; result = -ENOMEM; if (! (req = smb_alloc_request(server, 0))) goto out; smb_setup_header(req, SMBread, 5, 0); buf = req->rq_header; WSET(buf, smb_vwv0, SMB_I(inode)->fileid); WSET(buf, smb_vwv1, count); DSET(buf, smb_vwv2, offset); WSET(buf, smb_vwv4, 0); req->rq_page = data; req->rq_rsize = count; req->rq_callback = smb_proc_read_data; req->rq_buffer = rbuf; req->rq_flags |= SMB_REQ_NORETRY | SMB_REQ_STATIC; result = smb_request_ok(req, SMBread, 5, -1); if (result < 0) goto out_free; returned_count = WVAL(req->rq_header, smb_vwv0); data_len = WVAL(rbuf, 1); if (returned_count != data_len) { printk(KERN_NOTICE "smb_proc_read: returned != data_len\n"); printk(KERN_NOTICE "smb_proc_read: ret_c=%d, data_len=%d\n", returned_count, data_len); } result = data_len; out_free: smb_rput(req); out: VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n", inode->i_ino, SMB_I(inode)->fileid, count, result); return result; } static int smb_proc_write(struct inode *inode, loff_t offset, int count, const char *data) { struct smb_sb_info *server = server_from_inode(inode); int result; u16 fileid = SMB_I(inode)->fileid; u8 buf[4]; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, 0))) goto out; VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n", inode->i_ino, fileid, count, offset); smb_setup_header(req, SMBwrite, 5, count + 3); WSET(req->rq_header, smb_vwv0, fileid); WSET(req->rq_header, smb_vwv1, count); DSET(req->rq_header, smb_vwv2, offset); WSET(req->rq_header, smb_vwv4, 0); buf[0] = 1; WSET(buf, 1, count); /* yes, again ... */ req->rq_iov[1].iov_base = buf; req->rq_iov[1].iov_len = 3; req->rq_iov[2].iov_base = (char *) data; req->rq_iov[2].iov_len = count; req->rq_iovlen = 3; req->rq_flags |= SMB_REQ_NORETRY; result = smb_request_ok(req, SMBwrite, 1, 0); if (result >= 0) result = WVAL(req->rq_header, smb_vwv0); smb_rput(req); out: return result; } /* * In smb_proc_readX and smb_proc_writeX we do not retry, because the * file-id would not be valid after a reconnection. */ #define SMB_READX_MAX_PAD 64 static void smb_proc_readX_data(struct smb_request *req) { /* header length, excluding the netbios length (-4) */ int hdrlen = SMB_HEADER_LEN + req->rq_resp_wct*2 - 2; int data_off = WVAL(req->rq_header, smb_vwv6); /* * Some genius made the padding to the data bytes arbitrary. * So we must first calculate the amount of padding used by the server. */ data_off -= hdrlen; if (data_off > SMB_READX_MAX_PAD || data_off < 0) { PARANOIA("offset is larger than SMB_READX_MAX_PAD or negative!\n"); PARANOIA("%d > %d || %d < 0\n", data_off, SMB_READX_MAX_PAD, data_off); req->rq_rlen = req->rq_bufsize + 1; return; } req->rq_iov[0].iov_base = req->rq_buffer; req->rq_iov[0].iov_len = data_off; req->rq_iov[1].iov_base = req->rq_page; req->rq_iov[1].iov_len = req->rq_rsize; req->rq_iovlen = 2; req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd; } static int smb_proc_readX(struct inode *inode, loff_t offset, int count, char *data) { struct smb_sb_info *server = server_from_inode(inode); unsigned char *buf; int result; struct smb_request *req; static char pad[SMB_READX_MAX_PAD]; result = -ENOMEM; if (! (req = smb_alloc_request(server, 0))) goto out; smb_setup_header(req, SMBreadX, 12, 0); buf = req->rq_header; WSET(buf, smb_vwv0, 0x00ff); WSET(buf, smb_vwv1, 0); WSET(buf, smb_vwv2, SMB_I(inode)->fileid); DSET(buf, smb_vwv3, (u32)offset); /* low 32 bits */ WSET(buf, smb_vwv5, count); WSET(buf, smb_vwv6, 0); DSET(buf, smb_vwv7, 0); WSET(buf, smb_vwv9, 0); DSET(buf, smb_vwv10, (u32)(offset >> 32)); /* high 32 bits */ WSET(buf, smb_vwv11, 0); req->rq_page = data; req->rq_rsize = count; req->rq_callback = smb_proc_readX_data; req->rq_buffer = pad; req->rq_bufsize = SMB_READX_MAX_PAD; req->rq_flags |= SMB_REQ_STATIC | SMB_REQ_NORETRY; result = smb_request_ok(req, SMBreadX, 12, -1); if (result < 0) goto out_free; result = WVAL(req->rq_header, smb_vwv5); out_free: smb_rput(req); out: VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n", inode->i_ino, SMB_I(inode)->fileid, count, result); return result; } static int smb_proc_writeX(struct inode *inode, loff_t offset, int count, const char *data) { struct smb_sb_info *server = server_from_inode(inode); int result; u8 *p; static u8 pad[4]; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, 0))) goto out; VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n", inode->i_ino, SMB_I(inode)->fileid, count, offset); p = smb_setup_header(req, SMBwriteX, 14, count + 1); WSET(req->rq_header, smb_vwv0, 0x00ff); WSET(req->rq_header, smb_vwv1, 0); WSET(req->rq_header, smb_vwv2, SMB_I(inode)->fileid); DSET(req->rq_header, smb_vwv3, (u32)offset); /* low 32 bits */ DSET(req->rq_header, smb_vwv5, 0); WSET(req->rq_header, smb_vwv7, 0); /* write mode */ WSET(req->rq_header, smb_vwv8, 0); WSET(req->rq_header, smb_vwv9, 0); WSET(req->rq_header, smb_vwv10, count); /* data length */ WSET(req->rq_header, smb_vwv11, smb_vwv12 + 2 + 1); DSET(req->rq_header, smb_vwv12, (u32)(offset >> 32)); req->rq_iov[1].iov_base = pad; req->rq_iov[1].iov_len = 1; req->rq_iov[2].iov_base = (char *) data; req->rq_iov[2].iov_len = count; req->rq_iovlen = 3; req->rq_flags |= SMB_REQ_NORETRY; result = smb_request_ok(req, SMBwriteX, 6, 0); if (result >= 0) result = WVAL(req->rq_header, smb_vwv2); smb_rput(req); out: return result; } int smb_proc_create(struct dentry *dentry, __u16 attr, time_t ctime, __u16 *fileid) { struct smb_sb_info *server = server_from_dentry(dentry); char *p; int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; p = smb_setup_header(req, SMBcreate, 3, 0); WSET(req->rq_header, smb_vwv0, attr); DSET(req->rq_header, smb_vwv1, utc2local(server, ctime)); result = smb_simple_encode_path(req, &p, dentry, NULL); if (result < 0) goto out_free; smb_setup_bcc(req, p); result = smb_request_ok(req, SMBcreate, 1, 0); if (result < 0) goto out_free; *fileid = WVAL(req->rq_header, smb_vwv0); result = 0; out_free: smb_rput(req); out: return result; } int smb_proc_mv(struct dentry *old_dentry, struct dentry *new_dentry) { struct smb_sb_info *server = server_from_dentry(old_dentry); char *p; int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; p = smb_setup_header(req, SMBmv, 1, 0); WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN | aDIR); result = smb_simple_encode_path(req, &p, old_dentry, NULL); if (result < 0) goto out_free; result = smb_simple_encode_path(req, &p, new_dentry, NULL); if (result < 0) goto out_free; smb_setup_bcc(req, p); if ((result = smb_request_ok(req, SMBmv, 0, 0)) < 0) goto out_free; result = 0; out_free: smb_rput(req); out: return result; } /* * Code common to mkdir and rmdir. */ static int smb_proc_generic_command(struct dentry *dentry, __u8 command) { struct smb_sb_info *server = server_from_dentry(dentry); char *p; int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; p = smb_setup_header(req, command, 0, 0); result = smb_simple_encode_path(req, &p, dentry, NULL); if (result < 0) goto out_free; smb_setup_bcc(req, p); result = smb_request_ok(req, command, 0, 0); if (result < 0) goto out_free; result = 0; out_free: smb_rput(req); out: return result; } int smb_proc_mkdir(struct dentry *dentry) { return smb_proc_generic_command(dentry, SMBmkdir); } int smb_proc_rmdir(struct dentry *dentry) { return smb_proc_generic_command(dentry, SMBrmdir); } #if SMBFS_POSIX_UNLINK /* * Removes readonly attribute from a file. Used by unlink to give posix * semantics. */ static int smb_set_rw(struct dentry *dentry,struct smb_sb_info *server) { int result; struct smb_fattr fattr; /* FIXME: cifsUE should allow removing a readonly file. */ /* first get current attribute */ smb_init_dirent(server, &fattr); result = server->ops->getattr(server, dentry, &fattr); smb_finish_dirent(server, &fattr); if (result < 0) return result; /* if RONLY attribute is set, remove it */ if (fattr.attr & aRONLY) { /* read only attribute is set */ fattr.attr &= ~aRONLY; result = smb_proc_setattr_core(server, dentry, fattr.attr); } return result; } #endif int smb_proc_unlink(struct dentry *dentry) { struct smb_sb_info *server = server_from_dentry(dentry); int flag = 0; char *p; int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; retry: p = smb_setup_header(req, SMBunlink, 1, 0); WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN); result = smb_simple_encode_path(req, &p, dentry, NULL); if (result < 0) goto out_free; smb_setup_bcc(req, p); if ((result = smb_request_ok(req, SMBunlink, 0, 0)) < 0) { #if SMBFS_POSIX_UNLINK if (result == -EACCES && !flag) { /* Posix semantics is for the read-only state of a file to be ignored in unlink(). In the SMB world a unlink() is refused on a read-only file. To make things easier for unix users we try to override the files permission if the unlink fails with the right error. This introduces a race condition that could lead to a file being written by someone who shouldn't have access, but as far as I can tell that is unavoidable */ /* remove RONLY attribute and try again */ result = smb_set_rw(dentry,server); if (result == 0) { flag = 1; req->rq_flags = 0; goto retry; } } #endif goto out_free; } result = 0; out_free: smb_rput(req); out: return result; } int smb_proc_flush(struct smb_sb_info *server, __u16 fileid) { int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, 0))) goto out; smb_setup_header(req, SMBflush, 1, 0); WSET(req->rq_header, smb_vwv0, fileid); req->rq_flags |= SMB_REQ_NORETRY; result = smb_request_ok(req, SMBflush, 0, 0); smb_rput(req); out: return result; } static int smb_proc_trunc32(struct inode *inode, loff_t length) { /* * Writing 0bytes is old-SMB magic for truncating files. * MAX_NON_LFS should prevent this from being called with a too * large offset. */ return smb_proc_write(inode, length, 0, NULL); } static int smb_proc_trunc64(struct inode *inode, loff_t length) { struct smb_sb_info *server = server_from_inode(inode); int result; char *param; char *data; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, 14))) goto out; param = req->rq_buffer; data = req->rq_buffer + 6; /* FIXME: must we also set allocation size? winNT seems to do that */ WSET(param, 0, SMB_I(inode)->fileid); WSET(param, 2, SMB_SET_FILE_END_OF_FILE_INFO); WSET(param, 4, 0); LSET(data, 0, length); req->rq_trans2_command = TRANSACT2_SETFILEINFO; req->rq_ldata = 8; req->rq_data = data; req->rq_lparm = 6; req->rq_parm = param; req->rq_flags |= SMB_REQ_NORETRY; result = smb_add_request(req); if (result < 0) goto out_free; result = 0; if (req->rq_rcls != 0) result = smb_errno(req); out_free: smb_rput(req); out: return result; } static int smb_proc_trunc95(struct inode *inode, loff_t length) { struct smb_sb_info *server = server_from_inode(inode); int result = smb_proc_trunc32(inode, length); /* * win9x doesn't appear to update the size immediately. * It will return the old file size after the truncate, * confusing smbfs. So we force an update. * * FIXME: is this still necessary? */ smb_proc_flush(server, SMB_I(inode)->fileid); return result; } static void smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr) { memset(fattr, 0, sizeof(*fattr)); fattr->f_nlink = 1; fattr->f_uid = server->mnt->uid; fattr->f_gid = server->mnt->gid; fattr->f_blksize = SMB_ST_BLKSIZE; fattr->f_unix = 0; } static void smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr) { if (fattr->f_unix) return; fattr->f_mode = server->mnt->file_mode; if (fattr->attr & aDIR) { fattr->f_mode = server->mnt->dir_mode; fattr->f_size = SMB_ST_BLKSIZE; } /* Check the read-only flag */ if (fattr->attr & aRONLY) fattr->f_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH); /* How many 512 byte blocks do we need for this file? */ fattr->f_blocks = 0; if (fattr->f_size != 0) fattr->f_blocks = 1 + ((fattr->f_size-1) >> 9); return; } void smb_init_root_dirent(struct smb_sb_info *server, struct smb_fattr *fattr, struct super_block *sb) { smb_init_dirent(server, fattr); fattr->attr = aDIR; fattr->f_ino = 2; /* traditional root inode number */ fattr->f_mtime = current_fs_time(sb); smb_finish_dirent(server, fattr); } /* * Decode a dirent for old protocols * * qname is filled with the decoded, and possibly translated, name. * fattr receives decoded attributes * * Bugs Noted: * (1) Pathworks servers may pad the name with extra spaces. */ static char * smb_decode_short_dirent(struct smb_sb_info *server, char *p, struct qstr *qname, struct smb_fattr *fattr, unsigned char *name_buf) { int len; /* * SMB doesn't have a concept of inode numbers ... */ smb_init_dirent(server, fattr); fattr->f_ino = 0; /* FIXME: do we need this? */ p += SMB_STATUS_SIZE; /* reserved (search_status) */ fattr->attr = *p; fattr->f_mtime.tv_sec = date_dos2unix(server, WVAL(p, 3), WVAL(p, 1)); fattr->f_mtime.tv_nsec = 0; fattr->f_size = DVAL(p, 5); fattr->f_ctime = fattr->f_mtime; fattr->f_atime = fattr->f_mtime; qname->name = p + 9; len = strnlen(qname->name, 12); /* * Trim trailing blanks for Pathworks servers */ while (len > 2 && qname->name[len-1] == ' ') len--; smb_finish_dirent(server, fattr); #if 0 /* FIXME: These only work for ascii chars, and recent smbmount doesn't allow the flag to be set anyway. It kills const. Remove? */ switch (server->opt.case_handling) { case SMB_CASE_UPPER: str_upper(entry->name, len); break; case SMB_CASE_LOWER: str_lower(entry->name, len); break; default: break; } #endif qname->len = 0; len = server->ops->convert(name_buf, SMB_MAXNAMELEN, qname->name, len, server->remote_nls, server->local_nls); if (len > 0) { qname->len = len; qname->name = name_buf; DEBUG1("len=%d, name=%.*s\n",qname->len,qname->len,qname->name); } return p + 22; } /* * This routine is used to read in directory entries from the network. * Note that it is for short directory name seeks, i.e.: protocol < * SMB_PROTOCOL_LANMAN2 */ static int smb_proc_readdir_short(struct file *filp, void *dirent, filldir_t filldir, struct smb_cache_control *ctl) { struct dentry *dir = filp->f_dentry; struct smb_sb_info *server = server_from_dentry(dir); struct qstr qname; struct smb_fattr fattr; char *p; int result; int i, first, entries_seen, entries; int entries_asked = (server->opt.max_xmit - 100) / SMB_DIRINFO_SIZE; __u16 bcc; __u16 count; char status[SMB_STATUS_SIZE]; static struct qstr mask = { .name = "*.*", .len = 3, }; unsigned char *last_status; struct smb_request *req; unsigned char *name_buf; VERBOSE("%s/%s\n", DENTRY_PATH(dir)); lock_kernel(); result = -ENOMEM; if (! (name_buf = kmalloc(SMB_MAXNAMELEN, GFP_KERNEL))) goto out; first = 1; entries = 0; entries_seen = 2; /* implicit . and .. */ result = -ENOMEM; if (! (req = smb_alloc_request(server, server->opt.max_xmit))) goto out_name; while (1) { p = smb_setup_header(req, SMBsearch, 2, 0); WSET(req->rq_header, smb_vwv0, entries_asked); WSET(req->rq_header, smb_vwv1, aDIR); if (first == 1) { result = smb_simple_encode_path(req, &p, dir, &mask); if (result < 0) goto out_free; if (p + 3 > (char *)req->rq_buffer + req->rq_bufsize) { result = -ENAMETOOLONG; goto out_free; } *p++ = 5; WSET(p, 0, 0); p += 2; first = 0; } else { if (p + 5 + SMB_STATUS_SIZE > (char *)req->rq_buffer + req->rq_bufsize) { result = -ENAMETOOLONG; goto out_free; } *p++ = 4; *p++ = 0; *p++ = 5; WSET(p, 0, SMB_STATUS_SIZE); p += 2; memcpy(p, status, SMB_STATUS_SIZE); p += SMB_STATUS_SIZE; } smb_setup_bcc(req, p); result = smb_request_ok(req, SMBsearch, 1, -1); if (result < 0) { if ((req->rq_rcls == ERRDOS) && (req->rq_err == ERRnofiles)) break; goto out_free; } count = WVAL(req->rq_header, smb_vwv0); if (count <= 0) break; result = -EIO; bcc = smb_bcc(req->rq_header); if (bcc != count * SMB_DIRINFO_SIZE + 3) goto out_free; p = req->rq_buffer + 3; /* Make sure the response fits in the buffer. Fixed sized entries means we don't have to check in the decode loop. */ last_status = req->rq_buffer + 3 + (count-1) * SMB_DIRINFO_SIZE; if (last_status + SMB_DIRINFO_SIZE >= req->rq_buffer + req->rq_bufsize) { printk(KERN_ERR "smb_proc_readdir_short: " "last dir entry outside buffer! " "%d@%p %d@%p\n", SMB_DIRINFO_SIZE, last_status, req->rq_bufsize, req->rq_buffer); goto out_free; } /* Read the last entry into the status field. */ memcpy(status, last_status, SMB_STATUS_SIZE); /* Now we are ready to parse smb directory entries. */ for (i = 0; i < count; i++) { p = smb_decode_short_dirent(server, p, &qname, &fattr, name_buf); if (qname.len == 0) continue; if (entries_seen == 2 && qname.name[0] == '.') { if (qname.len == 1) continue; if (qname.name[1] == '.' && qname.len == 2) continue; } if (!smb_fill_cache(filp, dirent, filldir, ctl, &qname, &fattr)) ; /* stop reading? */ entries_seen++; } } result = entries; out_free: smb_rput(req); out_name: kfree(name_buf); out: unlock_kernel(); return result; } static void smb_decode_unix_basic(struct smb_fattr *fattr, struct smb_sb_info *server, char *p) { u64 size, disk_bytes; /* FIXME: verify nls support. all is sent as utf8? */ fattr->f_unix = 1; fattr->f_mode = 0; /* FIXME: use the uniqueID from the remote instead? */ /* 0 L file size in bytes */ /* 8 L file size on disk in bytes (block count) */ /* 40 L uid */ /* 48 L gid */ /* 56 W file type */ /* 60 L devmajor */ /* 68 L devminor */ /* 76 L unique ID (inode) */ /* 84 L permissions */ /* 92 L link count */ size = LVAL(p, 0); disk_bytes = LVAL(p, 8); /* * Some samba versions round up on-disk byte usage * to 1MB boundaries, making it useless. When seeing * that, use the size instead. */ if (!(disk_bytes & 0xfffff)) disk_bytes = size+511; fattr->f_size = size; fattr->f_blocks = disk_bytes >> 9; fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 16)); fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 24)); fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 32)); if (server->mnt->flags & SMB_MOUNT_UID) fattr->f_uid = server->mnt->uid; else fattr->f_uid = LVAL(p, 40); if (server->mnt->flags & SMB_MOUNT_GID) fattr->f_gid = server->mnt->gid; else fattr->f_gid = LVAL(p, 48); fattr->f_mode |= smb_filetype_to_mode(WVAL(p, 56)); if (S_ISBLK(fattr->f_mode) || S_ISCHR(fattr->f_mode)) { __u64 major = LVAL(p, 60); __u64 minor = LVAL(p, 68); fattr->f_rdev = MKDEV(major & 0xffffffff, minor & 0xffffffff); if (MAJOR(fattr->f_rdev) != (major & 0xffffffff) || MINOR(fattr->f_rdev) != (minor & 0xffffffff)) fattr->f_rdev = 0; } fattr->f_mode |= LVAL(p, 84); if ( (server->mnt->flags & SMB_MOUNT_DMODE) && (S_ISDIR(fattr->f_mode)) ) fattr->f_mode = (server->mnt->dir_mode & S_IRWXUGO) | S_IFDIR; else if ( (server->mnt->flags & SMB_MOUNT_FMODE) && !(S_ISDIR(fattr->f_mode)) ) fattr->f_mode = (server->mnt->file_mode & S_IRWXUGO) | (fattr->f_mode & S_IFMT); } /* * Interpret a long filename structure using the specified info level: * level 1 for anything below NT1 protocol * level 260 for NT1 protocol * * qname is filled with the decoded, and possibly translated, name * fattr receives decoded attributes. * * Bugs Noted: * (1) Win NT 4.0 appends a null byte to names and counts it in the length! */ static char * smb_decode_long_dirent(struct smb_sb_info *server, char *p, int level, struct qstr *qname, struct smb_fattr *fattr, unsigned char *name_buf) { char *result; unsigned int len = 0; int n; __u16 date, time; int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE); /* * SMB doesn't have a concept of inode numbers ... */ smb_init_dirent(server, fattr); fattr->f_ino = 0; /* FIXME: do we need this? */ switch (level) { case 1: len = *((unsigned char *) p + 22); qname->name = p + 23; result = p + 24 + len; date = WVAL(p, 0); time = WVAL(p, 2); fattr->f_ctime.tv_sec = date_dos2unix(server, date, time); fattr->f_ctime.tv_nsec = 0; date = WVAL(p, 4); time = WVAL(p, 6); fattr->f_atime.tv_sec = date_dos2unix(server, date, time); fattr->f_atime.tv_nsec = 0; date = WVAL(p, 8); time = WVAL(p, 10); fattr->f_mtime.tv_sec = date_dos2unix(server, date, time); fattr->f_mtime.tv_nsec = 0; fattr->f_size = DVAL(p, 12); /* ULONG allocation size */ fattr->attr = WVAL(p, 20); VERBOSE("info 1 at %p, len=%d, name=%.*s\n", p, len, len, qname->name); break; case 260: result = p + WVAL(p, 0); len = DVAL(p, 60); if (len > 255) len = 255; /* NT4 null terminates, unless we are using unicode ... */ qname->name = p + 94; if (!unicode && len && qname->name[len-1] == '\0') len--; fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 8)); fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 16)); fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 24)); /* change time (32) */ fattr->f_size = LVAL(p, 40); /* alloc size (48) */ fattr->attr = DVAL(p, 56); VERBOSE("info 260 at %p, len=%d, name=%.*s\n", p, len, len, qname->name); break; case SMB_FIND_FILE_UNIX: result = p + WVAL(p, 0); qname->name = p + 108; len = strlen(qname->name); /* FIXME: should we check the length?? */ p += 8; smb_decode_unix_basic(fattr, server, p); VERBOSE("info SMB_FIND_FILE_UNIX at %p, len=%d, name=%.*s\n", p, len, len, qname->name); break; default: PARANOIA("Unknown info level %d\n", level); result = p + WVAL(p, 0); goto out; } smb_finish_dirent(server, fattr); #if 0 /* FIXME: These only work for ascii chars, and recent smbmount doesn't allow the flag to be set anyway. Remove? */ switch (server->opt.case_handling) { case SMB_CASE_UPPER: str_upper(qname->name, len); break; case SMB_CASE_LOWER: str_lower(qname->name, len); break; default: break; } #endif qname->len = 0; n = server->ops->convert(name_buf, SMB_MAXNAMELEN, qname->name, len, server->remote_nls, server->local_nls); if (n > 0) { qname->len = n; qname->name = name_buf; } out: return result; } /* findfirst/findnext flags */ #define SMB_CLOSE_AFTER_FIRST (1<<0) #define SMB_CLOSE_IF_END (1<<1) #define SMB_REQUIRE_RESUME_KEY (1<<2) #define SMB_CONTINUE_BIT (1<<3) /* * Note: samba-2.0.7 (at least) has a very similar routine, cli_list, in * source/libsmb/clilist.c. When looking for smb bugs in the readdir code, * go there for advise. * * Bugs Noted: * (1) When using Info Level 1 Win NT 4.0 truncates directory listings * for certain patterns of names and/or lengths. The breakage pattern * is completely reproducible and can be toggled by the creation of a * single file. (E.g. echo hi >foo breaks, rm -f foo works.) */ static int smb_proc_readdir_long(struct file *filp, void *dirent, filldir_t filldir, struct smb_cache_control *ctl) { struct dentry *dir = filp->f_dentry; struct smb_sb_info *server = server_from_dentry(dir); struct qstr qname; struct smb_fattr fattr; unsigned char *p, *lastname; char *mask, *param; __u16 command; int first, entries_seen; /* Both NT and OS/2 accept info level 1 (but see note below). */ int info_level = 260; const int max_matches = 512; unsigned int ff_searchcount = 0; unsigned int ff_eos = 0; unsigned int ff_lastname = 0; unsigned int ff_dir_handle = 0; unsigned int loop_count = 0; unsigned int mask_len, i; int result; struct smb_request *req; unsigned char *name_buf; static struct qstr star = { .name = "*", .len = 1, }; lock_kernel(); /* * We always prefer unix style. Use info level 1 for older * servers that don't do 260. */ if (server->opt.capabilities & SMB_CAP_UNIX) info_level = SMB_FIND_FILE_UNIX; else if (server->opt.protocol < SMB_PROTOCOL_NT1) info_level = 1; result = -ENOMEM; if (! (name_buf = kmalloc(SMB_MAXNAMELEN+2, GFP_KERNEL))) goto out; if (! (req = smb_alloc_request(server, server->opt.max_xmit))) goto out_name; param = req->rq_buffer; /* * Encode the initial path */ mask = param + 12; result = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dir, &star); if (result <= 0) goto out_free; mask_len = result - 1; /* mask_len is strlen, not #bytes */ result = 0; first = 1; VERBOSE("starting mask_len=%d, mask=%s\n", mask_len, mask); entries_seen = 2; ff_eos = 0; while (ff_eos == 0) { loop_count += 1; if (loop_count > 10) { printk(KERN_WARNING "smb_proc_readdir_long: " "Looping in FIND_NEXT??\n"); result = -EIO; break; } if (first != 0) { command = TRANSACT2_FINDFIRST; WSET(param, 0, aSYSTEM | aHIDDEN | aDIR); WSET(param, 2, max_matches); /* max count */ WSET(param, 4, SMB_CLOSE_IF_END); WSET(param, 6, info_level); DSET(param, 8, 0); } else { command = TRANSACT2_FINDNEXT; VERBOSE("handle=0x%X, lastname=%d, mask=%.*s\n", ff_dir_handle, ff_lastname, mask_len, mask); WSET(param, 0, ff_dir_handle); /* search handle */ WSET(param, 2, max_matches); /* max count */ WSET(param, 4, info_level); DSET(param, 6, 0); WSET(param, 10, SMB_CONTINUE_BIT|SMB_CLOSE_IF_END); } req->rq_trans2_command = command; req->rq_ldata = 0; req->rq_data = NULL; req->rq_lparm = 12 + mask_len + 1; req->rq_parm = param; req->rq_flags = 0; result = smb_add_request(req); if (result < 0) { PARANOIA("error=%d, breaking\n", result); break; } if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) { /* a damn Win95 bug - sometimes it clags if you ask it too fast */ schedule_timeout_interruptible(msecs_to_jiffies(200)); continue; } if (req->rq_rcls != 0) { result = smb_errno(req); PARANOIA("name=%s, result=%d, rcls=%d, err=%d\n", mask, result, req->rq_rcls, req->rq_err); break; } /* parse out some important return info */ if (first != 0) { ff_dir_handle = WVAL(req->rq_parm, 0); ff_searchcount = WVAL(req->rq_parm, 2); ff_eos = WVAL(req->rq_parm, 4); ff_lastname = WVAL(req->rq_parm, 8); } else { ff_searchcount = WVAL(req->rq_parm, 0); ff_eos = WVAL(req->rq_parm, 2); ff_lastname = WVAL(req->rq_parm, 6); } if (ff_searchcount == 0) break; /* Now we are ready to parse smb directory entries. */ /* point to the data bytes */ p = req->rq_data; for (i = 0; i < ff_searchcount; i++) { /* make sure we stay within the buffer */ if (p >= req->rq_data + req->rq_ldata) { printk(KERN_ERR "smb_proc_readdir_long: " "dirent pointer outside buffer! " "%p %d@%p\n", p, req->rq_ldata, req->rq_data); result = -EIO; /* always a comm. error? */ goto out_free; } p = smb_decode_long_dirent(server, p, info_level, &qname, &fattr, name_buf); /* ignore . and .. from the server */ if (entries_seen == 2 && qname.name[0] == '.') { if (qname.len == 1) continue; if (qname.name[1] == '.' && qname.len == 2) continue; } if (!smb_fill_cache(filp, dirent, filldir, ctl, &qname, &fattr)) ; /* stop reading? */ entries_seen++; } VERBOSE("received %d entries, eos=%d\n", ff_searchcount,ff_eos); /* * We might need the lastname for continuations. * * Note that some servers (win95?) point to the filename and * others (NT4, Samba using NT1) to the dir entry. We assume * here that those who do not point to a filename do not need * this info to continue the listing. * * OS/2 needs this and talks infolevel 1. * NetApps want lastname with infolevel 260. * win2k want lastname with infolevel 260, and points to * the record not to the name. * Samba+CifsUnixExt doesn't need lastname. * * Both are happy if we return the data they point to. So we do. * (FIXME: above is not true with win2k) */ mask_len = 0; if (info_level != SMB_FIND_FILE_UNIX && ff_lastname > 0 && ff_lastname < req->rq_ldata) { lastname = req->rq_data + ff_lastname; switch (info_level) { case 260: mask_len = req->rq_ldata - ff_lastname; break; case 1: /* lastname points to a length byte */ mask_len = *lastname++; if (ff_lastname + 1 + mask_len > req->rq_ldata) mask_len = req->rq_ldata - ff_lastname - 1; break; } /* * Update the mask string for the next message. */ if (mask_len > 255) mask_len = 255; if (mask_len) strncpy(mask, lastname, mask_len); } mask_len = strnlen(mask, mask_len); VERBOSE("new mask, len=%d@%d of %d, mask=%.*s\n", mask_len, ff_lastname, req->rq_ldata, mask_len, mask); first = 0; loop_count = 0; } out_free: smb_rput(req); out_name: kfree(name_buf); out: unlock_kernel(); return result; } /* * This version uses the trans2 TRANSACT2_FINDFIRST message * to get the attribute data. * * Bugs Noted: */ static int smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry, struct smb_fattr *fattr) { char *param, *mask; __u16 date, time; int mask_len, result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; param = req->rq_buffer; mask = param + 12; mask_len = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dentry,NULL); if (mask_len < 0) { result = mask_len; goto out_free; } VERBOSE("name=%s, len=%d\n", mask, mask_len); WSET(param, 0, aSYSTEM | aHIDDEN | aDIR); WSET(param, 2, 1); /* max count */ WSET(param, 4, 1); /* close after this call */ WSET(param, 6, 1); /* info_level */ DSET(param, 8, 0); req->rq_trans2_command = TRANSACT2_FINDFIRST; req->rq_ldata = 0; req->rq_data = NULL; req->rq_lparm = 12 + mask_len; req->rq_parm = param; req->rq_flags = 0; result = smb_add_request(req); if (result < 0) goto out_free; if (req->rq_rcls != 0) { result = smb_errno(req); #ifdef SMBFS_PARANOIA if (result != -ENOENT) PARANOIA("error for %s, rcls=%d, err=%d\n", mask, req->rq_rcls, req->rq_err); #endif goto out_free; } /* Make sure we got enough data ... */ result = -EINVAL; if (req->rq_ldata < 22 || WVAL(req->rq_parm, 2) != 1) { PARANOIA("bad result for %s, len=%d, count=%d\n", mask, req->rq_ldata, WVAL(req->rq_parm, 2)); goto out_free; } /* * Decode the response into the fattr ... */ date = WVAL(req->rq_data, 0); time = WVAL(req->rq_data, 2); fattr->f_ctime.tv_sec = date_dos2unix(server, date, time); fattr->f_ctime.tv_nsec = 0; date = WVAL(req->rq_data, 4); time = WVAL(req->rq_data, 6); fattr->f_atime.tv_sec = date_dos2unix(server, date, time); fattr->f_atime.tv_nsec = 0; date = WVAL(req->rq_data, 8); time = WVAL(req->rq_data, 10); fattr->f_mtime.tv_sec = date_dos2unix(server, date, time); fattr->f_mtime.tv_nsec = 0; VERBOSE("name=%s, date=%x, time=%x, mtime=%ld\n", mask, date, time, fattr->f_mtime); fattr->f_size = DVAL(req->rq_data, 12); /* ULONG allocation size */ fattr->attr = WVAL(req->rq_data, 20); result = 0; out_free: smb_rput(req); out: return result; } static int smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir, struct smb_fattr *fattr) { int result; char *p; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; p = smb_setup_header(req, SMBgetatr, 0, 0); result = smb_simple_encode_path(req, &p, dir, NULL); if (result < 0) goto out_free; smb_setup_bcc(req, p); if ((result = smb_request_ok(req, SMBgetatr, 10, 0)) < 0) goto out_free; fattr->attr = WVAL(req->rq_header, smb_vwv0); fattr->f_mtime.tv_sec = local2utc(server, DVAL(req->rq_header, smb_vwv1)); fattr->f_mtime.tv_nsec = 0; fattr->f_size = DVAL(req->rq_header, smb_vwv3); fattr->f_ctime = fattr->f_mtime; fattr->f_atime = fattr->f_mtime; #ifdef SMBFS_DEBUG_TIMESTAMP printk("getattr_core: %s/%s, mtime=%ld\n", DENTRY_PATH(dir), fattr->f_mtime); #endif result = 0; out_free: smb_rput(req); out: return result; } /* * Bugs Noted: * (1) Win 95 swaps the date and time fields in the standard info level. */ static int smb_proc_getattr_trans2(struct smb_sb_info *server, struct dentry *dir, struct smb_request *req, int infolevel) { char *p, *param; int result; param = req->rq_buffer; WSET(param, 0, infolevel); DSET(param, 2, 0); result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL); if (result < 0) goto out; p = param + 6 + result; req->rq_trans2_command = TRANSACT2_QPATHINFO; req->rq_ldata = 0; req->rq_data = NULL; req->rq_lparm = p - param; req->rq_parm = param; req->rq_flags = 0; result = smb_add_request(req); if (result < 0) goto out; if (req->rq_rcls != 0) { VERBOSE("for %s: result=%d, rcls=%d, err=%d\n", ¶m[6], result, req->rq_rcls, req->rq_err); result = smb_errno(req); goto out; } result = -ENOENT; if (req->rq_ldata < 22) { PARANOIA("not enough data for %s, len=%d\n", ¶m[6], req->rq_ldata); goto out; } result = 0; out: return result; } static int smb_proc_getattr_trans2_std(struct smb_sb_info *server, struct dentry *dir, struct smb_fattr *attr) { u16 date, time; int off_date = 0, off_time = 2; int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; result = smb_proc_getattr_trans2(server, dir, req, SMB_INFO_STANDARD); if (result < 0) goto out_free; /* * Kludge alert: Win 95 swaps the date and time field, * contrary to the CIFS docs and Win NT practice. */ if (server->mnt->flags & SMB_MOUNT_WIN95) { off_date = 2; off_time = 0; } date = WVAL(req->rq_data, off_date); time = WVAL(req->rq_data, off_time); attr->f_ctime.tv_sec = date_dos2unix(server, date, time); attr->f_ctime.tv_nsec = 0; date = WVAL(req->rq_data, 4 + off_date); time = WVAL(req->rq_data, 4 + off_time); attr->f_atime.tv_sec = date_dos2unix(server, date, time); attr->f_atime.tv_nsec = 0; date = WVAL(req->rq_data, 8 + off_date); time = WVAL(req->rq_data, 8 + off_time); attr->f_mtime.tv_sec = date_dos2unix(server, date, time); attr->f_mtime.tv_nsec = 0; #ifdef SMBFS_DEBUG_TIMESTAMP printk(KERN_DEBUG "getattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n", DENTRY_PATH(dir), date, time, attr->f_mtime); #endif attr->f_size = DVAL(req->rq_data, 12); attr->attr = WVAL(req->rq_data, 20); out_free: smb_rput(req); out: return result; } static int smb_proc_getattr_trans2_all(struct smb_sb_info *server, struct dentry *dir, struct smb_fattr *attr) { struct smb_request *req; int result; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; result = smb_proc_getattr_trans2(server, dir, req, SMB_QUERY_FILE_ALL_INFO); if (result < 0) goto out_free; attr->f_ctime = smb_ntutc2unixutc(LVAL(req->rq_data, 0)); attr->f_atime = smb_ntutc2unixutc(LVAL(req->rq_data, 8)); attr->f_mtime = smb_ntutc2unixutc(LVAL(req->rq_data, 16)); /* change (24) */ attr->attr = WVAL(req->rq_data, 32); /* pad? (34) */ /* allocated size (40) */ attr->f_size = LVAL(req->rq_data, 48); out_free: smb_rput(req); out: return result; } static int smb_proc_getattr_unix(struct smb_sb_info *server, struct dentry *dir, struct smb_fattr *attr) { struct smb_request *req; int result; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; result = smb_proc_getattr_trans2(server, dir, req, SMB_QUERY_FILE_UNIX_BASIC); if (result < 0) goto out_free; smb_decode_unix_basic(attr, server, req->rq_data); out_free: smb_rput(req); out: return result; } static int smb_proc_getattr_95(struct smb_sb_info *server, struct dentry *dir, struct smb_fattr *attr) { struct inode *inode = dir->d_inode; int result; /* FIXME: why not use the "all" version? */ result = smb_proc_getattr_trans2_std(server, dir, attr); if (result < 0) goto out; /* * None of the getattr versions here can make win9x return the right * filesize if there are changes made to an open file. * A seek-to-end does return the right size, but we only need to do * that on files we have written. */ if (inode && SMB_I(inode)->flags & SMB_F_LOCALWRITE && smb_is_open(inode)) { __u16 fileid = SMB_I(inode)->fileid; attr->f_size = smb_proc_seek(server, fileid, 2, 0); } out: return result; } static int smb_proc_ops_wait(struct smb_sb_info *server) { int result; result = wait_event_interruptible_timeout(server->conn_wq, server->conn_complete, 30*HZ); if (!result || signal_pending(current)) return -EIO; return 0; } static int smb_proc_getattr_null(struct smb_sb_info *server, struct dentry *dir, struct smb_fattr *fattr) { int result; if (smb_proc_ops_wait(server) < 0) return -EIO; smb_init_dirent(server, fattr); result = server->ops->getattr(server, dir, fattr); smb_finish_dirent(server, fattr); return result; } static int smb_proc_readdir_null(struct file *filp, void *dirent, filldir_t filldir, struct smb_cache_control *ctl) { struct smb_sb_info *server = server_from_dentry(filp->f_dentry); if (smb_proc_ops_wait(server) < 0) return -EIO; return server->ops->readdir(filp, dirent, filldir, ctl); } int smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr) { struct smb_sb_info *server = server_from_dentry(dir); int result; smb_init_dirent(server, fattr); result = server->ops->getattr(server, dir, fattr); smb_finish_dirent(server, fattr); return result; } /* * Because of bugs in the core protocol, we use this only to set * attributes. See smb_proc_settime() below for timestamp handling. * * Bugs Noted: * (1) If mtime is non-zero, both Win 3.1 and Win 95 fail * with an undocumented error (ERRDOS code 50). Setting * mtime to 0 allows the attributes to be set. * (2) The extra parameters following the name string aren't * in the CIFS docs, but seem to be necessary for operation. */ static int smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry, __u16 attr) { char *p; int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; p = smb_setup_header(req, SMBsetatr, 8, 0); WSET(req->rq_header, smb_vwv0, attr); DSET(req->rq_header, smb_vwv1, 0); /* mtime */ WSET(req->rq_header, smb_vwv3, 0); /* reserved values */ WSET(req->rq_header, smb_vwv4, 0); WSET(req->rq_header, smb_vwv5, 0); WSET(req->rq_header, smb_vwv6, 0); WSET(req->rq_header, smb_vwv7, 0); result = smb_simple_encode_path(req, &p, dentry, NULL); if (result < 0) goto out_free; if (p + 2 > (char *)req->rq_buffer + req->rq_bufsize) { result = -ENAMETOOLONG; goto out_free; } *p++ = 4; *p++ = 0; smb_setup_bcc(req, p); result = smb_request_ok(req, SMBsetatr, 0, 0); if (result < 0) goto out_free; result = 0; out_free: smb_rput(req); out: return result; } /* * Because of bugs in the trans2 setattr messages, we must set * attributes and timestamps separately. The core SMBsetatr * message seems to be the only reliable way to set attributes. */ int smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr) { struct smb_sb_info *server = server_from_dentry(dir); int result; VERBOSE("setting %s/%s, open=%d\n", DENTRY_PATH(dir), smb_is_open(dir->d_inode)); result = smb_proc_setattr_core(server, dir, fattr->attr); return result; } /* * Sets the timestamps for an file open with write permissions. */ static int smb_proc_setattr_ext(struct smb_sb_info *server, struct inode *inode, struct smb_fattr *fattr) { __u16 date, time; int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, 0))) goto out; smb_setup_header(req, SMBsetattrE, 7, 0); WSET(req->rq_header, smb_vwv0, SMB_I(inode)->fileid); /* We don't change the creation time */ WSET(req->rq_header, smb_vwv1, 0); WSET(req->rq_header, smb_vwv2, 0); date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time); WSET(req->rq_header, smb_vwv3, date); WSET(req->rq_header, smb_vwv4, time); date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time); WSET(req->rq_header, smb_vwv5, date); WSET(req->rq_header, smb_vwv6, time); #ifdef SMBFS_DEBUG_TIMESTAMP printk(KERN_DEBUG "smb_proc_setattr_ext: date=%d, time=%d, mtime=%ld\n", date, time, fattr->f_mtime); #endif req->rq_flags |= SMB_REQ_NORETRY; result = smb_request_ok(req, SMBsetattrE, 0, 0); if (result < 0) goto out_free; result = 0; out_free: smb_rput(req); out: return result; } /* * Bugs Noted: * (1) The TRANSACT2_SETPATHINFO message under Win NT 4.0 doesn't * set the file's attribute flags. */ static int smb_proc_setattr_trans2(struct smb_sb_info *server, struct dentry *dir, struct smb_fattr *fattr) { __u16 date, time; char *p, *param; int result; char data[26]; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; param = req->rq_buffer; WSET(param, 0, 1); /* Info level SMB_INFO_STANDARD */ DSET(param, 2, 0); result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL); if (result < 0) goto out_free; p = param + 6 + result; WSET(data, 0, 0); /* creation time */ WSET(data, 2, 0); date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time); WSET(data, 4, date); WSET(data, 6, time); date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time); WSET(data, 8, date); WSET(data, 10, time); #ifdef SMBFS_DEBUG_TIMESTAMP printk(KERN_DEBUG "setattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n", DENTRY_PATH(dir), date, time, fattr->f_mtime); #endif DSET(data, 12, 0); /* size */ DSET(data, 16, 0); /* blksize */ WSET(data, 20, 0); /* attr */ DSET(data, 22, 0); /* ULONG EA size */ req->rq_trans2_command = TRANSACT2_SETPATHINFO; req->rq_ldata = 26; req->rq_data = data; req->rq_lparm = p - param; req->rq_parm = param; req->rq_flags = 0; result = smb_add_request(req); if (result < 0) goto out_free; result = 0; if (req->rq_rcls != 0) result = smb_errno(req); out_free: smb_rput(req); out: return result; } /* * ATTR_MODE 0x001 * ATTR_UID 0x002 * ATTR_GID 0x004 * ATTR_SIZE 0x008 * ATTR_ATIME 0x010 * ATTR_MTIME 0x020 * ATTR_CTIME 0x040 * ATTR_ATIME_SET 0x080 * ATTR_MTIME_SET 0x100 * ATTR_FORCE 0x200 * ATTR_ATTR_FLAG 0x400 * * major/minor should only be set by mknod. */ int smb_proc_setattr_unix(struct dentry *d, struct iattr *attr, unsigned int major, unsigned int minor) { struct smb_sb_info *server = server_from_dentry(d); u64 nttime; char *p, *param; int result; char data[100]; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; param = req->rq_buffer; DEBUG1("valid flags = 0x%04x\n", attr->ia_valid); WSET(param, 0, SMB_SET_FILE_UNIX_BASIC); DSET(param, 2, 0); result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL); if (result < 0) goto out_free; p = param + 6 + result; /* 0 L file size in bytes */ /* 8 L file size on disk in bytes (block count) */ /* 40 L uid */ /* 48 L gid */ /* 56 W file type enum */ /* 60 L devmajor */ /* 68 L devminor */ /* 76 L unique ID (inode) */ /* 84 L permissions */ /* 92 L link count */ LSET(data, 0, SMB_SIZE_NO_CHANGE); LSET(data, 8, SMB_SIZE_NO_CHANGE); LSET(data, 16, SMB_TIME_NO_CHANGE); LSET(data, 24, SMB_TIME_NO_CHANGE); LSET(data, 32, SMB_TIME_NO_CHANGE); LSET(data, 40, SMB_UID_NO_CHANGE); LSET(data, 48, SMB_GID_NO_CHANGE); DSET(data, 56, smb_filetype_from_mode(attr->ia_mode)); LSET(data, 60, major); LSET(data, 68, minor); LSET(data, 76, 0); LSET(data, 84, SMB_MODE_NO_CHANGE); LSET(data, 92, 0); if (attr->ia_valid & ATTR_SIZE) { LSET(data, 0, attr->ia_size); LSET(data, 8, 0); /* can't set anyway */ } /* * FIXME: check the conversion function it the correct one * * we can't set ctime but we might as well pass this to the server * and let it ignore it. */ if (attr->ia_valid & ATTR_CTIME) { nttime = smb_unixutc2ntutc(attr->ia_ctime); LSET(data, 16, nttime); } if (attr->ia_valid & ATTR_ATIME) { nttime = smb_unixutc2ntutc(attr->ia_atime); LSET(data, 24, nttime); } if (attr->ia_valid & ATTR_MTIME) { nttime = smb_unixutc2ntutc(attr->ia_mtime); LSET(data, 32, nttime); } if (attr->ia_valid & ATTR_UID) { LSET(data, 40, attr->ia_uid); } if (attr->ia_valid & ATTR_GID) { LSET(data, 48, attr->ia_gid); } if (attr->ia_valid & ATTR_MODE) { LSET(data, 84, attr->ia_mode); } req->rq_trans2_command = TRANSACT2_SETPATHINFO; req->rq_ldata = 100; req->rq_data = data; req->rq_lparm = p - param; req->rq_parm = param; req->rq_flags = 0; result = smb_add_request(req); out_free: smb_rput(req); out: return result; } /* * Set the modify and access timestamps for a file. * * Incredibly enough, in all of SMB there is no message to allow * setting both attributes and timestamps at once. * * Bugs Noted: * (1) Win 95 doesn't support the TRANSACT2_SETFILEINFO message * with info level 1 (INFO_STANDARD). * (2) Win 95 seems not to support setting directory timestamps. * (3) Under the core protocol apparently the only way to set the * timestamp is to open and close the file. */ int smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr) { struct smb_sb_info *server = server_from_dentry(dentry); struct inode *inode = dentry->d_inode; int result; VERBOSE("setting %s/%s, open=%d\n", DENTRY_PATH(dentry), smb_is_open(inode)); /* setting the time on a Win95 server fails (tridge) */ if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2 && !(server->mnt->flags & SMB_MOUNT_WIN95)) { if (smb_is_open(inode) && SMB_I(inode)->access != SMB_O_RDONLY) result = smb_proc_setattr_ext(server, inode, fattr); else result = smb_proc_setattr_trans2(server, dentry, fattr); } else { /* * Fail silently on directories ... timestamp can't be set? */ result = 0; if (S_ISREG(inode->i_mode)) { /* * Set the mtime by opening and closing the file. * Note that the file is opened read-only, but this * still allows us to set the date (tridge) */ result = -EACCES; if (!smb_is_open(inode)) smb_proc_open(server, dentry, SMB_O_RDONLY); if (smb_is_open(inode)) { inode->i_mtime = fattr->f_mtime; result = smb_proc_close_inode(server, inode); } } } return result; } int smb_proc_dskattr(struct super_block *sb, struct kstatfs *attr) { struct smb_sb_info *server = SMB_SB(sb); int result; char *p; long unit; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, 0))) goto out; smb_setup_header(req, SMBdskattr, 0, 0); if ((result = smb_request_ok(req, SMBdskattr, 5, 0)) < 0) goto out_free; p = SMB_VWV(req->rq_header); unit = (WVAL(p, 2) * WVAL(p, 4)) >> SMB_ST_BLKSHIFT; attr->f_blocks = WVAL(p, 0) * unit; attr->f_bsize = SMB_ST_BLKSIZE; attr->f_bavail = attr->f_bfree = WVAL(p, 6) * unit; result = 0; out_free: smb_rput(req); out: return result; } int smb_proc_read_link(struct smb_sb_info *server, struct dentry *d, char *buffer, int len) { char *p, *param; int result; struct smb_request *req; DEBUG1("readlink of %s/%s\n", DENTRY_PATH(d)); result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; param = req->rq_buffer; WSET(param, 0, SMB_QUERY_FILE_UNIX_LINK); DSET(param, 2, 0); result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL); if (result < 0) goto out_free; p = param + 6 + result; req->rq_trans2_command = TRANSACT2_QPATHINFO; req->rq_ldata = 0; req->rq_data = NULL; req->rq_lparm = p - param; req->rq_parm = param; req->rq_flags = 0; result = smb_add_request(req); if (result < 0) goto out_free; DEBUG1("for %s: result=%d, rcls=%d, err=%d\n", ¶m[6], result, req->rq_rcls, req->rq_err); /* copy data up to the \0 or buffer length */ result = len; if (req->rq_ldata < len) result = req->rq_ldata; strncpy(buffer, req->rq_data, result); out_free: smb_rput(req); out: return result; } /* * Create a symlink object called dentry which points to oldpath. * Samba does not permit dangling links but returns a suitable error message. */ int smb_proc_symlink(struct smb_sb_info *server, struct dentry *d, const char *oldpath) { char *p, *param; int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; param = req->rq_buffer; WSET(param, 0, SMB_SET_FILE_UNIX_LINK); DSET(param, 2, 0); result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, d, NULL); if (result < 0) goto out_free; p = param + 6 + result; req->rq_trans2_command = TRANSACT2_SETPATHINFO; req->rq_ldata = strlen(oldpath) + 1; req->rq_data = (char *) oldpath; req->rq_lparm = p - param; req->rq_parm = param; req->rq_flags = 0; result = smb_add_request(req); if (result < 0) goto out_free; DEBUG1("for %s: result=%d, rcls=%d, err=%d\n", ¶m[6], result, req->rq_rcls, req->rq_err); result = 0; out_free: smb_rput(req); out: return result; } /* * Create a hard link object called new_dentry which points to dentry. */ int smb_proc_link(struct smb_sb_info *server, struct dentry *dentry, struct dentry *new_dentry) { char *p, *param; int result; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, PAGE_SIZE))) goto out; param = req->rq_buffer; WSET(param, 0, SMB_SET_FILE_UNIX_HLINK); DSET(param, 2, 0); result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, new_dentry, NULL); if (result < 0) goto out_free; p = param + 6 + result; /* Grr, pointless separation of parameters and data ... */ req->rq_data = p; req->rq_ldata = smb_encode_path(server, p, SMB_MAXPATHLEN+1, dentry, NULL); req->rq_trans2_command = TRANSACT2_SETPATHINFO; req->rq_lparm = p - param; req->rq_parm = param; req->rq_flags = 0; result = smb_add_request(req); if (result < 0) goto out_free; DEBUG1("for %s: result=%d, rcls=%d, err=%d\n", ¶m[6], result, req->rq_rcls, req->rq_err); result = 0; out_free: smb_rput(req); out: return result; } static int smb_proc_query_cifsunix(struct smb_sb_info *server) { int result; int major, minor; u64 caps; char param[2]; struct smb_request *req; result = -ENOMEM; if (! (req = smb_alloc_request(server, 100))) goto out; WSET(param, 0, SMB_QUERY_CIFS_UNIX_INFO); req->rq_trans2_command = TRANSACT2_QFSINFO; req->rq_ldata = 0; req->rq_data = NULL; req->rq_lparm = 2; req->rq_parm = param; req->rq_flags = 0; result = smb_add_request(req); if (result < 0) goto out_free; if (req->rq_ldata < 12) { PARANOIA("Not enough data\n"); goto out_free; } major = WVAL(req->rq_data, 0); minor = WVAL(req->rq_data, 2); DEBUG1("Server implements CIFS Extensions for UNIX systems v%d.%d\n", major, minor); /* FIXME: verify that we are ok with this major/minor? */ caps = LVAL(req->rq_data, 4); DEBUG1("Server capabilities 0x%016llx\n", caps); out_free: smb_rput(req); out: return result; } static void install_ops(struct smb_ops *dst, struct smb_ops *src) { memcpy(dst, src, sizeof(void *) * SMB_OPS_NUM_STATIC); } /* < LANMAN2 */ static struct smb_ops smb_ops_core = { .read = smb_proc_read, .write = smb_proc_write, .readdir = smb_proc_readdir_short, .getattr = smb_proc_getattr_core, .truncate = smb_proc_trunc32, }; /* LANMAN2, OS/2, others? */ static struct smb_ops smb_ops_os2 = { .read = smb_proc_read, .write = smb_proc_write, .readdir = smb_proc_readdir_long, .getattr = smb_proc_getattr_trans2_std, .truncate = smb_proc_trunc32, }; /* Win95, and possibly some NetApp versions too */ static struct smb_ops smb_ops_win95 = { .read = smb_proc_read, /* does not support 12word readX */ .write = smb_proc_write, .readdir = smb_proc_readdir_long, .getattr = smb_proc_getattr_95, .truncate = smb_proc_trunc95, }; /* Samba, NT4 and NT5 */ static struct smb_ops smb_ops_winNT = { .read = smb_proc_readX, .write = smb_proc_writeX, .readdir = smb_proc_readdir_long, .getattr = smb_proc_getattr_trans2_all, .truncate = smb_proc_trunc64, }; /* Samba w/ unix extensions. Others? */ static struct smb_ops smb_ops_unix = { .read = smb_proc_readX, .write = smb_proc_writeX, .readdir = smb_proc_readdir_long, .getattr = smb_proc_getattr_unix, /* FIXME: core/ext/time setattr needs to be cleaned up! */ /* .setattr = smb_proc_setattr_unix, */ .truncate = smb_proc_trunc64, }; /* Place holder until real ops are in place */ static struct smb_ops smb_ops_null = { .readdir = smb_proc_readdir_null, .getattr = smb_proc_getattr_null, }; void smb_install_null_ops(struct smb_ops *ops) { install_ops(ops, &smb_ops_null); }