diff options
Diffstat (limited to 'fs/smbfs/proc.c')
| -rw-r--r-- | fs/smbfs/proc.c | 3509 |
1 files changed, 3509 insertions, 0 deletions
diff --git a/fs/smbfs/proc.c b/fs/smbfs/proc.c new file mode 100644 index 000000000000..220babe91efd --- /dev/null +++ b/fs/smbfs/proc.c @@ -0,0 +1,3509 @@ +/* + * 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/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 */ + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(HZ/5); + 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); + LSET(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); +} |