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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [fs/] [smbfs/] [proc.c] - Rev 1778
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/* * proc.c * * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke * * 28/06/96 - Fixed long file name support (smb_proc_readdir_long) by Yuri Per */ #include <linux/config.h> #include <linux/fs.h> #include <linux/smbno.h> #include <linux/smb_fs.h> #include <linux/types.h> #include <linux/errno.h> #include <linux/malloc.h> #include <linux/stat.h> #include <linux/fcntl.h> #include <asm/segment.h> #include <asm/string.h> #define SMB_VWV(packet) ((packet) + SMB_HEADER_LEN) #define SMB_CMD(packet) (BVAL(packet,8)) #define SMB_WCT(packet) (BVAL(packet, SMB_HEADER_LEN - 1)) #define SMB_BCC(packet) smb_bcc(packet) #define SMB_BUF(packet) ((packet) + SMB_HEADER_LEN + SMB_WCT(packet) * 2 + 2) #define SMB_DIRINFO_SIZE 43 #define SMB_STATUS_SIZE 21 static int smb_request_ok(struct smb_server *s, int command, int wct, int bcc); static inline int min(int a, int b) { return a < b ? a : b; } static void str_upper(char *name) { while (*name) { if (*name >= 'a' && *name <= 'z') *name -= ('a' - 'A'); name++; } } static void str_lower(char *name) { while (*name) { if (*name >= 'A' && *name <= 'Z') *name += ('a' - 'A'); name++; } } /*****************************************************************************/ /* */ /* Encoding/Decoding section */ /* */ /*****************************************************************************/ static inline byte * smb_decode_word(byte * p, word * data) { *data = WVAL(p, 0); return p + 2; } byte * smb_encode_smb_length(byte * p, dword len) { BSET(p, 0, 0); BSET(p, 1, 0); BSET(p, 2, (len & 0xFF00) >> 8); BSET(p, 3, (len & 0xFF)); if (len > 0xFFFF) { BSET(p, 1, 1); } return p + 4; } static byte * smb_encode_ascii(byte * p, const byte * name, int len) { *p++ = 4; strcpy(p, name); return p + len + 1; } static byte * smb_encode_this_name(byte * p, const char *name, const int len) { *p++ = '\\'; strncpy(p, name, len); return p + len; } /* I put smb_encode_parents into a separate function so that the recursion only takes 16 bytes on the stack per path component on a 386. */ static byte * smb_encode_parents(byte * p, struct smb_inode_info *ino) { byte *q; if (ino->dir == NULL) { return p; } q = smb_encode_parents(p, ino->dir); if (q - p + 1 + ino->finfo.len > SMB_MAXPATHLEN) { return p; } return smb_encode_this_name(q, ino->finfo.name, ino->finfo.len); } static byte * smb_encode_path(struct smb_server *server, byte * p, struct smb_inode_info *dir, const char *name, const int len) { byte *start = p; if (dir != NULL) { p = smb_encode_parents(p, dir); } p = smb_encode_this_name(p, name, len); *p++ = 0; if (server->protocol <= PROTOCOL_COREPLUS) { str_upper(start); } return p; } static byte * smb_decode_data(byte * p, byte * data, word * data_len, int fs) { word len; if (!(*p == 1 || *p == 5)) { printk("smb_decode_data: Warning! Data block not starting " "with 1 or 5\n"); } len = WVAL(p, 1); p += 3; if (fs) memcpy_tofs(data, p, len); else memcpy(data, p, len); *data_len = len; return p + len; } static byte * smb_name_mangle(byte * p, const byte * name) { int len, pad = 0; len = strlen(name); if (len < 16) pad = 16 - len; *p++ = 2 * (len + pad); while (*name) { *p++ = (*name >> 4) + 'A'; *p++ = (*name & 0x0F) + 'A'; name++; } while (pad--) { *p++ = 'C'; *p++ = 'A'; } *p++ = '\0'; return p; } /* 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 */ extern struct timezone sys_tz; static int utc2local(int time) { return time - sys_tz.tz_minuteswest * 60 + sys_tz.tz_dsttime * 3600; } static int local2utc(int time) { return time + sys_tz.tz_minuteswest * 60 - sys_tz.tz_dsttime * 3600; } /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ static int date_dos2unix(unsigned short time, unsigned short date) { int month, year, secs; month = ((date >> 5) & 15) - 1; 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(secs); } /*****************************************************************************/ /* */ /* Support section. */ /* */ /*****************************************************************************/ dword smb_len(byte * p) { return ((BVAL(p, 1) & 0x1) << 16L) | (BVAL(p, 2) << 8L) | (BVAL(p, 3)); } static word smb_bcc(byte * packet) { int pos = SMB_HEADER_LEN + SMB_WCT(packet) * sizeof(word); return WVAL(packet, pos); } /* smb_valid_packet: We check if packet fulfills the basic requirements of a smb packet */ static int smb_valid_packet(byte * packet) { DDPRINTK("len: %d, wct: %d, bcc: %d\n", smb_len(packet), SMB_WCT(packet), SMB_BCC(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(byte * packet, int command, int wct, int bcc) { return (SMB_CMD(packet) == command && SMB_WCT(packet) >= wct && (bcc == -1 || SMB_BCC(packet) >= bcc)) ? 0 : -EIO; } static int smb_errno(int errcls, int error) { if (errcls == ERRDOS) switch (error) { case ERRbadfunc: return EINVAL; case ERRbadfile: return ENOENT; 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: return EREMOTEIO; 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 0; case ERRbadshare: return ETXTBSY; case ERRlock: return EDEADLK; case ERRfilexists: return EEXIST; case 87: return 0; /* Unknown error!! */ /* This next error seems to occur on an mv when * the destination exists */ case 183: return EEXIST; default: return EIO; } else if (errcls == ERRSRV) switch (error) { case ERRerror: return ENFILE; case ERRbadpw: return EINVAL; case ERRbadtype: return EIO; case ERRaccess: return EACCES; default: return EIO; } else if (errcls == ERRHRD) switch (error) { case ERRnowrite: return EROFS; case ERRbadunit: return ENODEV; case ERRnotready: return EUCLEAN; case ERRbadcmd: return EIO; case ERRdata: return EIO; case ERRbadreq: return ERANGE; case ERRbadshare: return ETXTBSY; case ERRlock: return EDEADLK; default: return EIO; } else if (errcls == ERRCMD) return EIO; return 0; } static void smb_lock_server(struct smb_server *server) { while (server->lock) sleep_on(&server->wait); server->lock = 1; } static void smb_unlock_server(struct smb_server *server) { if (server->lock != 1) { printk("smb_unlock_server: was not locked!\n"); } server->lock = 0; wake_up(&server->wait); } /* 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_server *s, int command, int wct, int bcc) { int result = 0; s->rcls = 0; s->err = 0; if (smb_request(s) < 0) { DPRINTK("smb_request failed\n"); result = -EIO; } else if (smb_valid_packet(s->packet) != 0) { DPRINTK("not a valid packet!\n"); result = -EIO; } else if (s->rcls != 0) { result = -smb_errno(s->rcls, s->err); } else if (smb_verify(s->packet, command, wct, bcc) != 0) { DPRINTK("smb_verify failed\n"); result = -EIO; } return result; } /* smb_retry: This function should be called when smb_request_ok has indicated an error. If the error was indicated because the connection was killed, we try to reconnect. If smb_retry returns 0, the error was indicated for another reason, so a retry would not be of any use. */ static int smb_retry(struct smb_server *server) { if (server->state != CONN_INVALID) { return 0; } if (smb_release(server) < 0) { DPRINTK("smb_retry: smb_release failed\n"); server->state = CONN_RETRIED; return 0; } if (smb_proc_reconnect(server) < 0) { DPRINTK("smb_proc_reconnect failed\n"); server->state = CONN_RETRIED; return 0; } server->state = CONN_VALID; return 1; } static int smb_request_ok_unlock(struct smb_server *s, int command, int wct, int bcc) { int result = smb_request_ok(s, command, wct, bcc); smb_unlock_server(s); return result; } /* smb_setup_header: We completely set up the packet. You only have to insert the command-specific fields */ __u8 * smb_setup_header(struct smb_server * server, byte command, word wct, word bcc) { dword xmit_len = SMB_HEADER_LEN + wct * sizeof(word) + bcc + 2; byte *p = server->packet; byte *buf = server->packet; p = smb_encode_smb_length(p, xmit_len - 4); BSET(p, 0, 0xff); BSET(p, 1, 'S'); BSET(p, 2, 'M'); BSET(p, 3, 'B'); BSET(p, 4, command); p += 5; memset(p, '\0', 19); p += 19; p += 8; WSET(buf, smb_tid, server->tid); WSET(buf, smb_pid, server->pid); WSET(buf, smb_uid, server->server_uid); WSET(buf, smb_mid, server->mid); if (server->protocol > PROTOCOL_CORE) { BSET(buf, smb_flg, 0x8); WSET(buf, smb_flg2, 0x3); } *p++ = wct; /* wct */ p += 2 * wct; WSET(p, 0, bcc); return p + 2; } /* smb_setup_header_exclusive waits on server->lock and locks the server, when it's free. You have to unlock it manually when you're finished with server->packet! */ static byte * smb_setup_header_exclusive(struct smb_server *server, byte command, word wct, word bcc) { smb_lock_server(server); return smb_setup_header(server, command, wct, bcc); } static void smb_setup_bcc(struct smb_server *server, byte * p) { __u8 *packet = server->packet; __u8 *pbcc = packet + SMB_HEADER_LEN + 2 * SMB_WCT(packet); __u16 bcc = p - (pbcc + 2); WSET(pbcc, 0, bcc); smb_encode_smb_length(packet, SMB_HEADER_LEN + 2 * SMB_WCT(packet) - 2 + bcc); } /*****************************************************************************/ /* */ /* File operation section. */ /* */ /*****************************************************************************/ int smb_proc_open(struct smb_server *server, struct smb_inode_info *dir, const char *name, int len, struct smb_dirent *entry) { int error; char *p; char *buf; const word o_attr = aSYSTEM | aHIDDEN | aDIR; DPRINTK("smb_proc_open: name=%s\n", name); smb_lock_server(server); if (entry->opened != 0) { /* Somebody else opened the file while we slept */ smb_unlock_server(server); return 0; } retry: buf = server->packet; p = smb_setup_header(server, SMBopen, 2, 0); WSET(buf, smb_vwv0, 0x42); /* read/write */ WSET(buf, smb_vwv1, o_attr); *p++ = 4; p = smb_encode_path(server, p, dir, name, len); smb_setup_bcc(server, p); if ((error = smb_request_ok(server, SMBopen, 7, 0)) != 0) { if (smb_retry(server)) { goto retry; } if ((error != -EACCES) && (error != -ETXTBSY) && (error != -EROFS)) { smb_unlock_server(server); return error; } /* N.B. Packet may change after request */ buf = server->packet; p = smb_setup_header(server, SMBopen, 2, 0); WSET(buf, smb_vwv0, 0x40); /* read only */ WSET(buf, smb_vwv1, o_attr); *p++ = 4; p = smb_encode_path(server, p, dir, name, len); smb_setup_bcc(server, p); if ((error = smb_request_ok(server, SMBopen, 7, 0)) != 0) { if (smb_retry(server)) { goto retry; } smb_unlock_server(server); return error; } } /* We should now have data in vwv[0..6]. */ /* N.B. Packet may change after request */ buf = server->packet; entry->fileid = WVAL(buf, smb_vwv0); entry->attr = WVAL(buf, smb_vwv1); entry->f_ctime = entry->f_atime = entry->f_mtime = local2utc(DVAL(buf, smb_vwv2)); entry->f_size = DVAL(buf, smb_vwv4); entry->access = WVAL(buf, smb_vwv6); entry->opened = 1; entry->access &= 3; smb_unlock_server(server); DPRINTK("smb_proc_open: entry->access = %d\n", entry->access); return 0; } int smb_proc_close(struct smb_server *server, __u16 fileid, __u32 mtime) { char *buf; smb_setup_header_exclusive(server, SMBclose, 3, 0); buf = server->packet; WSET(buf, smb_vwv0, fileid); DSET(buf, smb_vwv1, utc2local(mtime)); return smb_request_ok_unlock(server, SMBclose, 0, 0); } /* In smb_proc_read and smb_proc_write we do not retry, because the file-id would not be valid after a reconnection. */ /* smb_proc_read: fs indicates if it should be copied with memcpy_tofs. */ int smb_proc_read(struct smb_server *server, struct smb_dirent *finfo, off_t offset, long count, char *data, int fs) { word returned_count, data_len; char *buf; int error; smb_setup_header_exclusive(server, SMBread, 5, 0); buf = server->packet; WSET(buf, smb_vwv0, finfo->fileid); WSET(buf, smb_vwv1, count); DSET(buf, smb_vwv2, offset); WSET(buf, smb_vwv4, 0); if ((error = smb_request_ok(server, SMBread, 5, -1)) < 0) { smb_unlock_server(server); return error; } returned_count = WVAL(server->packet, smb_vwv0); smb_decode_data(SMB_BUF(server->packet), data, &data_len, fs); smb_unlock_server(server); if (returned_count != data_len) { printk("smb_proc_read: Warning, returned_count != data_len\n"); printk("smb_proc_read: ret_c=%d, data_len=%d\n", returned_count, data_len); } return data_len; } int smb_proc_write(struct smb_server *server, struct smb_dirent *finfo, off_t offset, int count, const char *data) { int res = 0; char *buf; byte *p; p = smb_setup_header_exclusive(server, SMBwrite, 5, count + 3); buf = server->packet; WSET(buf, smb_vwv0, finfo->fileid); WSET(buf, smb_vwv1, count); DSET(buf, smb_vwv2, offset); WSET(buf, smb_vwv4, 0); *p++ = 1; WSET(p, 0, count); memcpy_fromfs(p + 2, data, count); if ((res = smb_request_ok(server, SMBwrite, 1, 0)) >= 0) { res = WVAL(server->packet, smb_vwv0); } smb_unlock_server(server); return res; } int smb_proc_create(struct inode *dir, const char *name, int len, word attr, time_t ctime) { int error; char *p; struct smb_server *server = SMB_SERVER(dir); char *buf; __u16 fileid; smb_lock_server(server); retry: buf = server->packet; p = smb_setup_header(server, SMBcreate, 3, 0); WSET(buf, smb_vwv0, attr); DSET(buf, smb_vwv1, utc2local(ctime)); *p++ = 4; p = smb_encode_path(server, p, SMB_INOP(dir), name, len); smb_setup_bcc(server, p); if ((error = smb_request_ok(server, SMBcreate, 1, 0)) < 0) { if (smb_retry(server)) { goto retry; } smb_unlock_server(server); return error; } fileid = WVAL(server->packet, smb_vwv0); smb_unlock_server(server); smb_proc_close(server, fileid, CURRENT_TIME); return 0; } int smb_proc_mv(struct inode *odir, const char *oname, const int olen, struct inode *ndir, const char *nname, const int nlen) { char *p; struct smb_server *server = SMB_SERVER(odir); int result; smb_lock_server(server); retry: p = smb_setup_header(server, SMBmv, 1, 0); WSET(server->packet, smb_vwv0, aSYSTEM | aHIDDEN); *p++ = 4; p = smb_encode_path(server, p, SMB_INOP(odir), oname, olen); *p++ = 4; p = smb_encode_path(server, p, SMB_INOP(ndir), nname, nlen); smb_setup_bcc(server, p); if ((result = smb_request_ok(server, SMBmv, 0, 0)) < 0) { if (smb_retry(server)) { goto retry; } } smb_unlock_server(server); return result; } int smb_proc_mkdir(struct inode *dir, const char *name, const int len) { char *p; int result; struct smb_server *server = SMB_SERVER(dir); smb_lock_server(server); retry: p = smb_setup_header(server, SMBmkdir, 0, 0); *p++ = 4; p = smb_encode_path(server, p, SMB_INOP(dir), name, len); smb_setup_bcc(server, p); if ((result = smb_request_ok(server, SMBmkdir, 0, 0)) < 0) { if (smb_retry(server)) { goto retry; } } smb_unlock_server(server); return result; } int smb_proc_rmdir(struct inode *dir, const char *name, const int len) { char *p; int result; struct smb_server *server = SMB_SERVER(dir); smb_lock_server(server); retry: p = smb_setup_header(server, SMBrmdir, 0, 0); *p++ = 4; p = smb_encode_path(server, p, SMB_INOP(dir), name, len); smb_setup_bcc(server, p); if ((result = smb_request_ok(server, SMBrmdir, 0, 0)) < 0) { if (smb_retry(server)) { goto retry; } } smb_unlock_server(server); return result; } int smb_proc_unlink(struct inode *dir, const char *name, const int len) { char *p; struct smb_server *server = SMB_SERVER(dir); int result; smb_lock_server(server); retry: p = smb_setup_header(server, SMBunlink, 1, 0); WSET(server->packet, smb_vwv0, aSYSTEM | aHIDDEN); *p++ = 4; p = smb_encode_path(server, p, SMB_INOP(dir), name, len); smb_setup_bcc(server, p); if ((result = smb_request_ok(server, SMBunlink, 0, 0)) < 0) { if (smb_retry(server)) { goto retry; } } smb_unlock_server(server); return result; } int smb_proc_trunc(struct smb_server *server, word fid, dword length) { char *p; char *buf; int result; smb_lock_server(server); retry: buf = server->packet; p = smb_setup_header(server, SMBwrite, 5, 0); WSET(buf, smb_vwv0, fid); WSET(buf, smb_vwv1, 0); DSET(buf, smb_vwv2, length); WSET(buf, smb_vwv4, 0); p = smb_encode_ascii(p, "", 0); smb_setup_bcc(server, p); if ((result = smb_request_ok(server, SMBwrite, 1, 0)) < 0) { if (smb_retry(server)) { goto retry; } } smb_unlock_server(server); return result; } static void smb_init_dirent(struct smb_server *server, struct smb_dirent *entry) { memset(entry, 0, sizeof(struct smb_dirent)); entry->f_nlink = 1; entry->f_uid = server->m.uid; entry->f_gid = server->m.gid; entry->f_blksize = 512; } static void smb_finish_dirent(struct smb_server *server, struct smb_dirent *entry) { if ((entry->attr & aDIR) != 0) { entry->f_mode = server->m.dir_mode; entry->f_size = 512; } else { entry->f_mode = server->m.file_mode; } if (entry->attr & aRONLY) entry->f_mode &= ~0222; if ((entry->f_blksize != 0) && (entry->f_size != 0)) { entry->f_blocks = (entry->f_size - 1) / entry->f_blksize + 1; } else { entry->f_blocks = 0; } return; } void smb_init_root_dirent(struct smb_server *server, struct smb_dirent *entry) { smb_init_dirent(server, entry); entry->attr = aDIR; entry->f_ino = 1; smb_finish_dirent(server, entry); } static char * smb_decode_dirent(struct smb_server *server, char *p, struct smb_dirent *entry) { smb_init_dirent(server, entry); p += SMB_STATUS_SIZE; /* reserved (search_status) */ entry->attr = BVAL(p, 0); entry->f_mtime = entry->f_atime = entry->f_ctime = date_dos2unix(WVAL(p, 1), WVAL(p, 3)); entry->f_size = DVAL(p, 5); entry->len = strlen(p + 9); if (entry->len > 12) { entry->len = 12; } memcpy(entry->name, p + 9, entry->len); entry->name[entry->len] = '\0'; while (entry->len > 2) { /* Pathworks fills names with spaces */ entry->len -= 1; if (entry->name[entry->len] == ' ') { entry->name[entry->len] = '\0'; } } switch (server->case_handling) { case CASE_UPPER: str_upper(entry->name); break; case CASE_LOWER: str_lower(entry->name); break; default: break; } DPRINTK("smb_decode_dirent: name = %s\n", entry->name); smb_finish_dirent(server, entry); 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 < PROTOCOL_LANMAN2 */ static int smb_proc_readdir_short(struct smb_server *server, struct inode *dir, int fpos, int cache_size, struct smb_dirent *entry) { char *p; char *buf; int error; int result; int i; int first, total_count; struct smb_dirent *current_entry; word bcc; word count; char status[SMB_STATUS_SIZE]; int entries_asked = (server->max_xmit - 100) / SMB_DIRINFO_SIZE; DPRINTK("SMB call readdir %d @ %d\n", cache_size, fpos); smb_lock_server(server); retry: buf = server->packet; first = 1; total_count = 0; current_entry = entry; while (1) { if (first == 1) { p = smb_setup_header(server, SMBsearch, 2, 0); WSET(buf, smb_vwv0, entries_asked); WSET(buf, smb_vwv1, aDIR); *p++ = 4; p = smb_encode_path(server, p, SMB_INOP(dir), "*.*", 3); *p++ = 5; WSET(p, 0, 0); p += 2; } else { p = smb_setup_header(server, SMBsearch, 2, 0); WSET(buf, smb_vwv0, entries_asked); WSET(buf, smb_vwv1, aDIR); p = smb_encode_ascii(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(server, p); if ((error = smb_request_ok(server, SMBsearch, 1, -1)) < 0) { if ((server->rcls == ERRDOS) && (server->err == ERRnofiles)) { result = total_count - fpos; goto unlock_return; } else { if (smb_retry(server)) { goto retry; } result = error; goto unlock_return; } } p = SMB_VWV(server->packet); p = smb_decode_word(p, &count); p = smb_decode_word(p, &bcc); first = 0; if (count <= 0) { result = total_count - fpos; goto unlock_return; } if (bcc != count * SMB_DIRINFO_SIZE + 3) { result = -EIO; goto unlock_return; } p += 3; /* Skipping VBLOCK header (5, length lo, length hi). */ /* Read the last entry into the status field. */ memcpy(status, SMB_BUF(server->packet) + 3 + (count - 1) * SMB_DIRINFO_SIZE, SMB_STATUS_SIZE); /* Now we are ready to parse smb directory entries. */ for (i = 0; i < count; i++) { if (total_count < fpos) { p += SMB_DIRINFO_SIZE; DDPRINTK("smb_proc_readdir: skipped entry.\n"); DDPRINTK(" total_count = %d\n" " i = %d, fpos = %d\n", total_count, i, fpos); } else if (total_count >= fpos + cache_size) { result = total_count - fpos; goto unlock_return; } else { p = smb_decode_dirent(server, p, current_entry); current_entry->f_pos = total_count; DDPRINTK("smb_proc_readdir: entry->f_pos = " "%lu\n", entry->f_pos); current_entry += 1; } total_count += 1; } } unlock_return: smb_unlock_server(server); return result; } /* interpret a long filename structure - this is mostly guesses at the moment. The length of the structure is returned. The structure of a long filename depends on the info level. 260 is used by NT and 2 is used by OS/2. */ static char * smb_decode_long_dirent(struct smb_server *server, char *p, struct smb_dirent *entry, int level) { char *result; smb_init_dirent(server, entry); switch (level) { /* We might add more levels later... */ case 1: entry->len = BVAL(p, 26); strncpy(entry->name, p + 27, entry->len); entry->name[entry->len] = '\0'; entry->f_size = DVAL(p, 16); entry->attr = BVAL(p, 24); entry->f_ctime = date_dos2unix(WVAL(p, 6), WVAL(p, 4)); entry->f_atime = date_dos2unix(WVAL(p, 10), WVAL(p, 8)); entry->f_mtime = date_dos2unix(WVAL(p, 14), WVAL(p, 12)); result = p + 28 + BVAL(p, 26); break; default: DPRINTK("Unknown long filename format %d\n", level); result = p + WVAL(p, 0); } switch (server->case_handling) { case CASE_UPPER: str_upper(entry->name); break; case CASE_LOWER: str_lower(entry->name); break; default: break; } smb_finish_dirent(server, entry); return result; } int smb_proc_readdir_long(struct smb_server *server, struct inode *dir, int fpos, int cache_size, struct smb_dirent *cache) { /* NT uses 260, OS/2 uses 2. Both accept 1. */ const int info_level = 1; const int max_matches = 512; char *p; char *lastname; int lastname_len; int i; int first, entries, entries_seen; unsigned char *resp_data = NULL; unsigned char *resp_param = NULL; int resp_data_len = 0; int resp_param_len = 0; __u16 command; int result; int ff_resume_key = 0; int ff_searchcount = 0; int ff_eos = 0; int ff_lastname = 0; int ff_dir_handle = 0; int loop_count = 0; char param[SMB_MAXPATHLEN + 2 + 12]; int mask_len; unsigned char *mask = &(param[12]); mask_len = smb_encode_path(server, mask, SMB_INOP(dir), "*", 1) - mask; mask[mask_len] = 0; mask[mask_len + 1] = 0; DPRINTK("smb_readdir_long cache=%d, fpos=%d, mask=%s\n", cache_size, fpos, mask); smb_lock_server(server); retry: first = 1; entries = 0; entries_seen = 2; while (ff_eos == 0) { loop_count += 1; if (loop_count > 200) { printk("smb_proc_readdir_long: " "Looping in FIND_NEXT??\n"); break; } if (first != 0) { command = TRANSACT2_FINDFIRST; WSET(param, 0, aSYSTEM | aHIDDEN | aDIR); WSET(param, 2, max_matches); /* max count */ WSET(param, 4, 8 + 4 + 2); /* resume required + close on end + continue */ WSET(param, 6, info_level); DSET(param, 8, 0); } else { command = TRANSACT2_FINDNEXT; DPRINTK("hand=0x%X resume=%d ff_lastname=%d mask=%s\n", ff_dir_handle, ff_resume_key, ff_lastname, mask); WSET(param, 0, ff_dir_handle); WSET(param, 2, max_matches); /* max count */ WSET(param, 4, info_level); DSET(param, 6, ff_resume_key); /* ff_resume_key */ WSET(param, 10, 8 + 4 + 2); /* resume required + close on end + continue */ } #ifdef CONFIG_SMB_WIN95 /* Windows 95 is not able to deliver answers to FIND_NEXT fast enough, so sleep 0.2 seconds */ current->timeout = jiffies + HZ / 5; current->state = TASK_INTERRUPTIBLE; schedule(); current->timeout = 0; #endif result = smb_trans2_request(server, command, 0, NULL, 12 + mask_len + 2, param, &resp_data_len, &resp_data, &resp_param_len, &resp_param); if (result < 0) { if (smb_retry(server)) { goto retry; } DPRINTK("smb_proc_readdir_long: " "got error from trans2_request\n"); break; } if (server->rcls != 0) { result = -EIO; break; } /* parse out some important return info */ if (first != 0) { ff_dir_handle = WVAL(resp_param, 0); ff_searchcount = WVAL(resp_param, 2); ff_eos = WVAL(resp_param, 4); ff_lastname = WVAL(resp_param, 8); } else { ff_searchcount = WVAL(resp_param, 0); ff_eos = WVAL(resp_param, 2); ff_lastname = WVAL(resp_param, 6); } if (ff_searchcount == 0) { break; } /* point to the data bytes */ p = resp_data; /* we might need the lastname for continuations */ lastname = ""; lastname_len = 0; if (ff_lastname > 0) { switch (info_level) { case 260: lastname = p + ff_lastname; lastname_len = resp_data_len - ff_lastname; ff_resume_key = 0; break; case 1: lastname = p + ff_lastname + 1; lastname_len = BVAL(p, ff_lastname); ff_resume_key = 0; break; } } lastname_len = min(lastname_len, 256); strncpy(mask, lastname, lastname_len); mask[lastname_len] = '\0'; /* Now we are ready to parse smb directory entries. */ for (i = 0; i < ff_searchcount; i++) { struct smb_dirent *entry = &(cache[entries]); p = smb_decode_long_dirent(server, p, entry, info_level); DDPRINTK("smb_readdir_long: got %s\n", entry->name); if ((entry->name[0] == '.') && ((entry->name[1] == '\0') || ((entry->name[1] == '.') && (entry->name[2] == '\0')))) { /* ignore . and .. from the server */ continue; } if (entries_seen >= fpos) { entry->f_pos = entries_seen; entries += 1; } if (entries >= cache_size) { goto finished; } entries_seen += 1; } DPRINTK("received %d entries (eos=%d resume=%d)\n", ff_searchcount, ff_eos, ff_resume_key); first = 0; } finished: smb_unlock_server(server); return entries; } int smb_proc_readdir(struct smb_server *server, struct inode *dir, int fpos, int cache_size, struct smb_dirent *entry) { if (server->protocol >= PROTOCOL_LANMAN2) return smb_proc_readdir_long(server, dir, fpos, cache_size, entry); else return smb_proc_readdir_short(server, dir, fpos, cache_size, entry); } /* * This version uses the core protocol to get the attribute info. * It works OK with Win 3.11, 95 and NT 3.51, but NOT with NT 4 (bad mtime). */ static int smb_proc_getattr_core(struct inode *dir, const char *name, int len, struct smb_dirent *entry) { int result; char *p; struct smb_server *server = SMB_SERVER(dir); char *buf; smb_lock_server(server); DDPRINTK("smb_proc_getattr_core: %s\n", name); retry: buf = server->packet; p = smb_setup_header(server, SMBgetatr, 0, 0); *p++ = 4; p = smb_encode_path(server, p, SMB_INOP(dir), name, len); smb_setup_bcc(server, p); if ((result = smb_request_ok(server, SMBgetatr, 10, 0)) < 0) { if (smb_retry(server)) { goto retry; } smb_unlock_server(server); return result; } /* N.B. Packet may change after request */ buf = server->packet; entry->attr = WVAL(buf, smb_vwv0); entry->f_ctime = entry->f_atime = entry->f_mtime = local2utc(DVAL(buf, smb_vwv1)); DDPRINTK("smb_proc_getattr_core: mtime=%ld\n", entry->f_mtime); entry->f_size = DVAL(buf, smb_vwv3); smb_unlock_server(server); return 0; } /* * This version uses the trans2 findfirst to get the attribute info. * It works fine with NT 3.51 and NT 4 (any SP), but not with Win95 (ERRerror). */ static int smb_proc_getattr_ff(struct inode *dir, const char *name, int len, struct smb_dirent *entry) { unsigned char *resp_data = NULL; unsigned char *resp_param = NULL; int resp_data_len = 0; int resp_param_len = 0; char param[SMB_MAXPATHLEN + 1 + 12]; int mask_len; unsigned char *mask = &(param[12]); int result; char *p; struct smb_server *server = SMB_SERVER(dir); mask_len = smb_encode_path(server, mask, SMB_INOP(dir), name, len) - mask; mask[mask_len] = 0; DDPRINTK("smb_proc_getattr_ff: mask=%s\n", mask); smb_lock_server(server); retry: WSET(param, 0, aSYSTEM | aHIDDEN | aDIR); WSET(param, 2, 1); /* max count */ WSET(param, 4, 2 + 1); /* close on end + close after this call */ WSET(param, 6, 1); /* info level */ DSET(param, 8, 0); result = smb_trans2_request(server, TRANSACT2_FINDFIRST, 0, NULL, 12 + mask_len + 1, param, &resp_data_len, &resp_data, &resp_param_len, &resp_param); if (result < 0) { if (smb_retry(server)) { DPRINTK("smb_proc_getattr_ff: error=%d, retrying\n", result); goto retry; } goto out; } if (server->rcls != 0) { result = -smb_errno(server->rcls, server->err); if (result != -ENOENT) DPRINTK("smb_proc_getattr_ff: rcls=%d, err=%d\n", server->rcls, server->err); goto out; } /* Make sure we got enough data ... */ result = -EINVAL; /* WVAL(resp_param, 2) is ff_searchcount */ if (resp_data_len < 22 || WVAL(resp_param, 2) != 1) { DPRINTK("smb_proc_getattr_ff: bad result, len=%d, count=%d\n", resp_data_len, WVAL(resp_param, 2)); goto out; } /* Decode the response (info level 1, as in smb_decode_long_dirent) */ p = resp_data; entry->f_ctime = date_dos2unix(WVAL(p, 2), WVAL(p, 0)); entry->f_atime = date_dos2unix(WVAL(p, 6), WVAL(p, 4)); entry->f_mtime = date_dos2unix(WVAL(p, 10), WVAL(p, 8)); entry->f_size = DVAL(p, 12); entry->attr = WVAL(p, 20); DDPRINTK("smb_proc_getattr_ff: attr=%x\n", entry->attr); result = 0; out: smb_unlock_server(server); return result; } int smb_proc_getattr(struct inode *dir, const char *name, int len, struct smb_dirent *entry) { struct smb_server *server = SMB_SERVER(dir); int result; smb_init_dirent(server, entry); /* Use trans2 for NT, use core protocol for others (Win95/3.11/...). * We distinguish NT from Win95 by looking at the capabilities, * in the same way as in Samba 1.9.18p2's reply.c. */ if ((server->protocol >= PROTOCOL_LANMAN2) && (server->blkmode & (CAP_NT_SMBS | CAP_STATUS32))) result = smb_proc_getattr_ff(dir, name, len, entry); else result = smb_proc_getattr_core(dir, name, len, entry); smb_finish_dirent(server, entry); entry->len = len; memcpy(entry->name, name, len); /* entry->name is null terminated from smb_init_dirent */ return result; } int smb_proc_setattr(struct smb_server *server, struct inode *i, struct smb_dirent *new_finfo) { char *p; char *buf; int result; smb_lock_server(server); retry: buf = server->packet; p = smb_setup_header(server, SMBsetatr, 8, 0); WSET(buf, smb_vwv0, new_finfo->attr); DSET(buf, smb_vwv1, 0); DSET(buf, smb_vwv3, 0); DSET(buf, smb_vwv5, 0); WSET(buf, smb_vwv7, 0); *p++ = 4; p = smb_encode_path(server, p, SMB_INOP(i)->dir, SMB_INOP(i)->finfo.name, SMB_INOP(i)->finfo.len); smb_setup_bcc(server, p); if ((result = smb_request_ok(server, SMBsetatr, 0, 0)) < 0) { if (smb_retry(server)) { goto retry; } } smb_unlock_server(server); return result; } int smb_proc_dskattr(struct super_block *super, struct smb_dskattr *attr) { int error; char *p; struct smb_server *server = &(SMB_SBP(super)->s_server); smb_lock_server(server); retry: smb_setup_header(server, SMBdskattr, 0, 0); if ((error = smb_request_ok(server, SMBdskattr, 5, 0)) < 0) { if (smb_retry(server)) { goto retry; } smb_unlock_server(server); return error; } p = SMB_VWV(server->packet); p = smb_decode_word(p, &attr->total); p = smb_decode_word(p, &attr->allocblocks); p = smb_decode_word(p, &attr->blocksize); p = smb_decode_word(p, &attr->free); smb_unlock_server(server); return 0; } /*****************************************************************************/ /* */ /* Mount/umount operations. */ /* */ /*****************************************************************************/ struct smb_prots { enum smb_protocol prot; const char *name; }; /* smb_proc_reconnect: We expect the server to be locked, so that you can call the routine from within smb_retry. The socket must be created, like after a user-level socket()-call. It may not be connected. */ int smb_proc_reconnect(struct smb_server *server) { struct smb_prots prots[] = { {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"}, {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"}, #ifdef LANMAN1 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"}, {PROTOCOL_LANMAN1, "LANMAN1.0"}, #endif #ifdef LANMAN2 {PROTOCOL_LANMAN2, "LM1.2X002"}, #endif #ifdef NT1 {PROTOCOL_NT1, "NT LM 0.12"}, {PROTOCOL_NT1, "NT LANMAN 1.0"}, #endif {-1, NULL}}; char dev[] = "A:"; int i, plength; int max_xmit = 1024; /* Space needed for first request. */ int given_max_xmit = server->m.max_xmit; int result; byte *p; if ((result = smb_connect(server)) < 0) { DPRINTK("smb_proc_reconnect: could not smb_connect\n"); goto fail; } /* Here we assume that the connection is valid */ server->state = CONN_VALID; if (server->packet != NULL) { smb_vfree(server->packet); server->packet = NULL; server->packet_size = 0; } server->packet = smb_vmalloc(max_xmit); if (server->packet == NULL) { printk("smb_proc_connect: No memory! Bailing out.\n"); result = -ENOMEM; goto fail; } server->packet_size = server->max_xmit = max_xmit; /* * Start with an RFC1002 session request packet. */ p = server->packet + 4; p = smb_name_mangle(p, server->m.server_name); p = smb_name_mangle(p, server->m.client_name); smb_encode_smb_length(server->packet, (void *) p - (void *) (server->packet)); server->packet[0] = 0x81; /* SESSION REQUEST */ if (smb_catch_keepalive(server) < 0) { printk("smb_proc_connect: could not catch_keepalives\n"); } if ((result = smb_request(server)) < 0) { DPRINTK("smb_proc_connect: Failed to send SESSION REQUEST.\n"); smb_dont_catch_keepalive(server); goto fail; } if (server->packet[0] != 0x82) { printk("smb_proc_connect: Did not receive positive response " "(err = %x)\n", server->packet[0]); smb_dont_catch_keepalive(server); result = -EIO; goto fail; } DPRINTK("smb_proc_connect: Passed SESSION REQUEST.\n"); /* Now we are ready to send a SMB Negotiate Protocol packet. */ memset(server->packet, 0, SMB_HEADER_LEN); plength = 0; for (i = 0; prots[i].name != NULL; i++) { plength += strlen(prots[i].name) + 2; } smb_setup_header(server, SMBnegprot, 0, plength); p = SMB_BUF(server->packet); for (i = 0; prots[i].name != NULL; i++) { *p++ = 2; strcpy(p, prots[i].name); p += strlen(prots[i].name) + 1; } if ((result = smb_request_ok(server, SMBnegprot, 1, -1)) < 0) { DPRINTK("smb_proc_connect: Failure requesting SMBnegprot\n"); smb_dont_catch_keepalive(server); goto fail; } else { DDPRINTK("smb_proc_connect: Request SMBnegprot.."); } DDPRINTK("Verified!\n"); p = SMB_VWV(server->packet); p = smb_decode_word(p, (word *) & i); #ifdef CONFIG_COLDFIRE /* * Not quite sure why this is needed??? * Maybe the byte swapping code is broken, but the result * byte is certainly in the wrong position within the word. */ i = i >> 16; #endif server->protocol = prots[i].prot; DPRINTK("smb_proc_connect: Server wants %s protocol.\n", prots[i].name); if (server->protocol >= PROTOCOL_LANMAN1) { word passlen = strlen(server->m.password); word userlen = strlen(server->m.username); #ifdef DEBUG_SMB_PASSWORD DPRINTK("smb_proc_connect: password = %s\n", server->m.password); #endif DPRINTK("smb_proc_connect: usernam = %s\n", server->m.username); if (server->protocol >= PROTOCOL_NT1) { server->max_xmit = DVAL(server->packet, smb_vwv3 + 1); server->maxmux = WVAL(server->packet, smb_vwv1 + 1); server->maxvcs = WVAL(server->packet, smb_vwv2 + 1); server->blkmode = DVAL(server->packet, smb_vwv9 + 1); server->sesskey = DVAL(server->packet, smb_vwv7 + 1); } else { server->max_xmit = WVAL(server->packet, smb_vwv2); server->maxmux = WVAL(server->packet, smb_vwv3); server->maxvcs = WVAL(server->packet, smb_vwv4); server->blkmode = WVAL(server->packet, smb_vwv5); server->sesskey = DVAL(server->packet, smb_vwv6); } DPRINTK("smb_proc_connect: blkmode (capabilities) = %x\n", server->blkmode); if (server->max_xmit < given_max_xmit) { /* We do not distinguish between the client requests and the server response. */ given_max_xmit = server->max_xmit; } if (server->protocol >= PROTOCOL_NT1) { char *workgroup = server->m.domain; char *OS_id = "Unix"; char *client_id = "ksmbfs"; smb_setup_header(server, SMBsesssetupX, 13, 5 + userlen + passlen + strlen(workgroup) + strlen(OS_id) + strlen(client_id)); WSET(server->packet, smb_vwv0, 0x00ff); WSET(server->packet, smb_vwv1, 0); WSET(server->packet, smb_vwv2, given_max_xmit); WSET(server->packet, smb_vwv3, 2); WSET(server->packet, smb_vwv4, server->pid); DSET(server->packet, smb_vwv5, server->sesskey); WSET(server->packet, smb_vwv7, passlen + 1); WSET(server->packet, smb_vwv8, 0); WSET(server->packet, smb_vwv9, 0); p = SMB_BUF(server->packet); strcpy(p, server->m.password); p += passlen + 1; strcpy(p, server->m.username); p += userlen + 1; strcpy(p, workgroup); p += strlen(p) + 1; strcpy(p, OS_id); p += strlen(p) + 1; strcpy(p, client_id); } else { smb_setup_header(server, SMBsesssetupX, 10, 2 + userlen + passlen); WSET(server->packet, smb_vwv0, 0x00ff); WSET(server->packet, smb_vwv1, 0); WSET(server->packet, smb_vwv2, given_max_xmit); WSET(server->packet, smb_vwv3, 2); WSET(server->packet, smb_vwv4, server->pid); DSET(server->packet, smb_vwv5, server->sesskey); WSET(server->packet, smb_vwv7, passlen + 1); WSET(server->packet, smb_vwv8, 0); WSET(server->packet, smb_vwv9, 0); p = SMB_BUF(server->packet); strcpy(p, server->m.password); p += passlen + 1; strcpy(p, server->m.username); } if ((result = smb_request_ok(server, SMBsesssetupX, 3, 0)) < 0) { DPRINTK("smb_proc_connect: SMBsessetupX failed\n"); smb_dont_catch_keepalive(server); goto fail; } smb_decode_word(server->packet + 32, &(server->server_uid)); } else { server->max_xmit = 0; server->maxmux = 0; server->maxvcs = 0; server->blkmode = 0; server->sesskey = 0; } /* Fine! We have a connection, send a tcon message. */ smb_setup_header(server, SMBtcon, 0, 6 + strlen(server->m.service) + strlen(server->m.password) + strlen(dev)); p = SMB_BUF(server->packet); p = smb_encode_ascii(p, server->m.service, strlen(server->m.service)); p = smb_encode_ascii(p, server->m.password, strlen(server->m.password)); p = smb_encode_ascii(p, dev, strlen(dev)); if ((result = smb_request_ok(server, SMBtcon, 2, 0)) < 0) { DPRINTK("smb_proc_connect: SMBtcon not verified.\n"); smb_dont_catch_keepalive(server); goto fail; } DDPRINTK("OK! Managed to set up SMBtcon!\n"); p = SMB_VWV(server->packet); if (server->protocol <= PROTOCOL_COREPLUS) { word max_xmit; p = smb_decode_word(p, &max_xmit); server->max_xmit = max_xmit; if (server->max_xmit > given_max_xmit) { server->max_xmit = given_max_xmit; } } else { p += 2; } p = smb_decode_word(p, &server->tid); /* Ok, everything is fine. max_xmit does not include */ /* the TCP-SMB header of 4 bytes. */ server->max_xmit += 4; DPRINTK("max_xmit = %d, tid = %d\n", server->max_xmit, server->tid); /* Now make a new packet with the correct size. */ smb_vfree(server->packet); server->packet = NULL; server->packet = smb_vmalloc(server->max_xmit); if (server->packet == NULL) { printk("smb_proc_connect: No memory left in end of " "connection phase :-(\n"); smb_dont_catch_keepalive(server); goto fail; } server->packet_size = server->max_xmit; DPRINTK("smb_proc_connect: Normal exit\n"); return 0; fail: server->state = CONN_INVALID; return result; } /* smb_proc_reconnect: server->packet is allocated with server->max_xmit bytes if and only if we return >= 0 */ int smb_proc_connect(struct smb_server *server) { int result; smb_lock_server(server); result = smb_proc_reconnect(server); if ((result < 0) && (server->packet != NULL)) { smb_vfree(server->packet); server->packet = NULL; } smb_unlock_server(server); return result; } int smb_proc_disconnect(struct smb_server *server) { smb_setup_header_exclusive(server, SMBtdis, 0, 0); return smb_request_ok_unlock(server, SMBtdis, 0, 0); }
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