--- /dev/null
+/*
+ * proc.c
+ *
+ * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
+ * Copyright (C) 1997 by Volker Lendecke
+ *
+ * Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/types.h>
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/stat.h>
+#include <linux/fcntl.h>
+#include <linux/dcache.h>
+#include <linux/nls.h>
+#include <linux/smp_lock.h>
+#include <linux/net.h>
+#include <linux/vfs.h>
+#include <net/sock.h>
+
+#include <asm/string.h>
+#include <asm/div64.h>
+
+#include "smb_fs.h"
+#include "smbno.h"
+#include "smb_mount.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);
+ while (!IS_ROOT(entry)) {
+ struct dentry *parent;
+
+ if (maxlen < (3<<unicode)) {
+ dput(entry);
+ return -ENAMETOOLONG;
+ }
+
+ spin_lock(&entry->d_lock);
+ 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;
+ spin_unlock(&entry->d_lock);
+
+ parent = dget_parent(entry);
+ dput(entry);
+ entry = parent;
+ }
+ 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 = 1; 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_path.dentry->d_inode))
+ goto out_putf;
+
+ server->sock_file = filp;
+ server->conn_pid = get_pid(task_pid(current));
+ 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_path.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,
+ pid_nr(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_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_path.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_path.dentry;
+ struct smb_sb_info *server = server_from_dentry(dir);
+ struct qstr qname;
+ struct smb_fattr fattr;
+
+ unsigned char *p, *lastname;
+ char *mask, *param;
+ __u16 command;
+ int first, entries_seen;
+
+ /* Both NT and OS/2 accept info level 1 (but see note below). */
+ int info_level = 260;
+ const int max_matches = 512;
+
+ unsigned int ff_searchcount = 0;
+ unsigned int ff_eos = 0;
+ unsigned int ff_lastname = 0;
+ unsigned int ff_dir_handle = 0;
+ unsigned int loop_count = 0;
+ unsigned int mask_len, i;
+ int result;
+ struct smb_request *req;
+ unsigned char *name_buf;
+ static struct qstr star = {
+ .name = "*",
+ .len = 1,
+ };
+
+ lock_kernel();
+
+ /*
+ * We always prefer unix style. Use info level 1 for older
+ * servers that don't do 260.
+ */
+ if (server->opt.capabilities & SMB_CAP_UNIX)
+ info_level = SMB_FIND_FILE_UNIX;
+ else if (server->opt.protocol < SMB_PROTOCOL_NT1)
+ info_level = 1;
+
+ result = -ENOMEM;
+ if (! (name_buf = kmalloc(SMB_MAXNAMELEN+2, GFP_KERNEL)))
+ goto out;
+ if (! (req = smb_alloc_request(server, server->opt.max_xmit)))
+ goto out_name;
+ param = req->rq_buffer;
+
+ /*
+ * Encode the initial path
+ */
+ mask = param + 12;
+
+ result = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dir, &star);
+ if (result <= 0)
+ goto out_free;
+ mask_len = result - 1; /* mask_len is strlen, not #bytes */
+ result = 0;
+ first = 1;
+ VERBOSE("starting mask_len=%d, mask=%s\n", mask_len, mask);
+
+ entries_seen = 2;
+ ff_eos = 0;
+
+ while (ff_eos == 0) {
+ loop_count += 1;
+ if (loop_count > 10) {
+ printk(KERN_WARNING "smb_proc_readdir_long: "
+ "Looping in FIND_NEXT??\n");
+ result = -EIO;
+ break;
+ }
+
+ if (first != 0) {
+ command = TRANSACT2_FINDFIRST;
+ WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
+ WSET(param, 2, max_matches); /* max count */
+ WSET(param, 4, SMB_CLOSE_IF_END);
+ WSET(param, 6, info_level);
+ DSET(param, 8, 0);
+ } else {
+ command = TRANSACT2_FINDNEXT;
+
+ VERBOSE("handle=0x%X, lastname=%d, mask=%.*s\n",
+ ff_dir_handle, ff_lastname, mask_len, mask);
+
+ WSET(param, 0, ff_dir_handle); /* search handle */
+ WSET(param, 2, max_matches); /* max count */
+ WSET(param, 4, info_level);
+ DSET(param, 6, 0);
+ WSET(param, 10, SMB_CONTINUE_BIT|SMB_CLOSE_IF_END);
+ }
+
+ req->rq_trans2_command = command;
+ req->rq_ldata = 0;
+ req->rq_data = NULL;
+ req->rq_lparm = 12 + mask_len + 1;
+ req->rq_parm = param;
+ req->rq_flags = 0;
+ result = smb_add_request(req);
+ if (result < 0) {
+ PARANOIA("error=%d, breaking\n", result);
+ break;
+ }
+
+ if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) {
+ /* a damn Win95 bug - sometimes it clags if you
+ ask it too fast */
+ schedule_timeout_interruptible(msecs_to_jiffies(200));
+ continue;
+ }
+
+ if (req->rq_rcls != 0) {
+ result = smb_errno(req);
+ PARANOIA("name=%s, result=%d, rcls=%d, err=%d\n",
+ mask, result, req->rq_rcls, req->rq_err);
+ break;
+ }
+
+ /* parse out some important return info */
+ if (first != 0) {
+ ff_dir_handle = WVAL(req->rq_parm, 0);
+ ff_searchcount = WVAL(req->rq_parm, 2);
+ ff_eos = WVAL(req->rq_parm, 4);
+ ff_lastname = WVAL(req->rq_parm, 8);
+ } else {
+ ff_searchcount = WVAL(req->rq_parm, 0);
+ ff_eos = WVAL(req->rq_parm, 2);
+ ff_lastname = WVAL(req->rq_parm, 6);
+ }
+
+ if (ff_searchcount == 0)
+ break;
+
+ /* Now we are ready to parse smb directory entries. */
+
+ /* point to the data bytes */
+ p = req->rq_data;
+ for (i = 0; i < ff_searchcount; i++) {
+ /* make sure we stay within the buffer */
+ if (p >= req->rq_data + req->rq_ldata) {
+ printk(KERN_ERR "smb_proc_readdir_long: "
+ "dirent pointer outside buffer! "
+ "%p %d@%p\n",
+ p, req->rq_ldata, req->rq_data);
+ result = -EIO; /* always a comm. error? */
+ goto out_free;
+ }
+
+ p = smb_decode_long_dirent(server, p, info_level,
+ &qname, &fattr, name_buf);
+
+ /* ignore . and .. from the server */
+ if (entries_seen == 2 && qname.name[0] == '.') {
+ if (qname.len == 1)
+ continue;
+ if (qname.name[1] == '.' && qname.len == 2)
+ continue;
+ }
+
+ if (!smb_fill_cache(filp, dirent, filldir, ctl,
+ &qname, &fattr))
+ ; /* stop reading? */
+ entries_seen++;
+ }
+
+ VERBOSE("received %d entries, eos=%d\n", ff_searchcount,ff_eos);
+
+ /*
+ * We might need the lastname for continuations.
+ *
+ * Note that some servers (win95?) point to the filename and
+ * others (NT4, Samba using NT1) to the dir entry. We assume
+ * here that those who do not point to a filename do not need
+ * this info to continue the listing.
+ *
+ * OS/2 needs this and talks infolevel 1.
+ * NetApps want lastname with infolevel 260.
+ * win2k want lastname with infolevel 260, and points to
+ * the record not to the name.
+ * Samba+CifsUnixExt doesn't need lastname.
+ *
+ * Both are happy if we return the data they point to. So we do.
+ * (FIXME: above is not true with win2k)
+ */
+ mask_len = 0;
+ if (info_level != SMB_FIND_FILE_UNIX &&
+ ff_lastname > 0 && ff_lastname < req->rq_ldata) {
+ lastname = req->rq_data + ff_lastname;
+
+ switch (info_level) {
+ case 260:
+ mask_len = req->rq_ldata - ff_lastname;
+ break;
+ case 1:
+ /* lastname points to a length byte */
+ mask_len = *lastname++;
+ if (ff_lastname + 1 + mask_len > req->rq_ldata)
+ mask_len = req->rq_ldata - ff_lastname - 1;
+ break;
+ }
+
+ /*
+ * Update the mask string for the next message.
+ */
+ if (mask_len > 255)
+ mask_len = 255;
+ if (mask_len)
+ strncpy(mask, lastname, mask_len);
+ }
+ mask_len = strnlen(mask, mask_len);
+ VERBOSE("new mask, len=%d@%d of %d, mask=%.*s\n",
+ mask_len, ff_lastname, req->rq_ldata, mask_len, mask);
+
+ first = 0;
+ loop_count = 0;
+ }
+
+out_free:
+ smb_rput(req);
+out_name:
+ kfree(name_buf);
+out:
+ unlock_kernel();
+ return result;
+}
+
+/*
+ * This version uses the trans2 TRANSACT2_FINDFIRST message
+ * to get the attribute data.
+ *
+ * Bugs Noted:
+ */
+static int
+smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
+ struct smb_fattr *fattr)
+{
+ char *param, *mask;
+ __u16 date, time;
+ int mask_len, result;
+ struct smb_request *req;
+
+ result = -ENOMEM;
+ if (! (req = smb_alloc_request(server, PAGE_SIZE)))
+ goto out;
+ param = req->rq_buffer;
+ mask = param + 12;
+
+ mask_len = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dentry,NULL);
+ if (mask_len < 0) {
+ result = mask_len;
+ goto out_free;
+ }
+ VERBOSE("name=%s, len=%d\n", mask, mask_len);
+ WSET(param, 0, aSYSTEM | aHIDDEN | aDIR);
+ WSET(param, 2, 1); /* max count */
+ WSET(param, 4, 1); /* close after this call */
+ WSET(param, 6, 1); /* info_level */
+ DSET(param, 8, 0);
+
+ req->rq_trans2_command = TRANSACT2_FINDFIRST;
+ req->rq_ldata = 0;
+ req->rq_data = NULL;
+ req->rq_lparm = 12 + mask_len;
+ req->rq_parm = param;
+ req->rq_flags = 0;
+ result = smb_add_request(req);
+ if (result < 0)
+ goto out_free;
+ if (req->rq_rcls != 0) {
+ result = smb_errno(req);
+#ifdef SMBFS_PARANOIA
+ if (result != -ENOENT)
+ PARANOIA("error for %s, rcls=%d, err=%d\n",
+ mask, req->rq_rcls, req->rq_err);
+#endif
+ goto out_free;
+ }
+ /* Make sure we got enough data ... */
+ result = -EINVAL;
+ if (req->rq_ldata < 22 || WVAL(req->rq_parm, 2) != 1) {
+ PARANOIA("bad result for %s, len=%d, count=%d\n",
+ mask, req->rq_ldata, WVAL(req->rq_parm, 2));
+ goto out_free;
+ }
+
+ /*
+ * Decode the response into the fattr ...
+ */
+ date = WVAL(req->rq_data, 0);
+ time = WVAL(req->rq_data, 2);
+ fattr->f_ctime.tv_sec = date_dos2unix(server, date, time);
+ fattr->f_ctime.tv_nsec = 0;
+
+ date = WVAL(req->rq_data, 4);
+ time = WVAL(req->rq_data, 6);
+ fattr->f_atime.tv_sec = date_dos2unix(server, date, time);
+ fattr->f_atime.tv_nsec = 0;
+
+ date = WVAL(req->rq_data, 8);
+ time = WVAL(req->rq_data, 10);
+ fattr->f_mtime.tv_sec = date_dos2unix(server, date, time);
+ fattr->f_mtime.tv_nsec = 0;
+ VERBOSE("name=%s, date=%x, time=%x, mtime=%ld\n",
+ mask, date, time, fattr->f_mtime.tv_sec);
+ 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_path.dentry);
+
+ if (smb_proc_ops_wait(server) < 0)
+ return -EIO;
+
+ return server->ops->readdir(filp, dirent, filldir, ctl);
+}
+
+int
+smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr)
+{
+ struct smb_sb_info *server = server_from_dentry(dir);
+ int result;
+
+ smb_init_dirent(server, fattr);
+ result = server->ops->getattr(server, dir, fattr);
+ smb_finish_dirent(server, fattr);
+
+ return result;
+}
+
+
+/*
+ * Because of bugs in the core protocol, we use this only to set
+ * attributes. See smb_proc_settime() below for timestamp handling.
+ *
+ * Bugs Noted:
+ * (1) If mtime is non-zero, both Win 3.1 and Win 95 fail
+ * with an undocumented error (ERRDOS code 50). Setting
+ * mtime to 0 allows the attributes to be set.
+ * (2) The extra parameters following the name string aren't
+ * in the CIFS docs, but seem to be necessary for operation.
+ */
+static int
+smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry,
+ __u16 attr)
+{
+ char *p;
+ int result;
+ struct smb_request *req;
+
+ result = -ENOMEM;
+ if (! (req = smb_alloc_request(server, PAGE_SIZE)))
+ goto out;
+
+ p = smb_setup_header(req, SMBsetatr, 8, 0);
+ WSET(req->rq_header, smb_vwv0, attr);
+ DSET(req->rq_header, smb_vwv1, 0); /* mtime */
+ WSET(req->rq_header, smb_vwv3, 0); /* reserved values */
+ WSET(req->rq_header, smb_vwv4, 0);
+ WSET(req->rq_header, smb_vwv5, 0);
+ WSET(req->rq_header, smb_vwv6, 0);
+ WSET(req->rq_header, smb_vwv7, 0);
+ result = smb_simple_encode_path(req, &p, dentry, NULL);
+ if (result < 0)
+ goto out_free;
+ if (p + 2 > (char *)req->rq_buffer + req->rq_bufsize) {
+ result = -ENAMETOOLONG;
+ goto out_free;
+ }
+ *p++ = 4;
+ *p++ = 0;
+ smb_setup_bcc(req, p);
+
+ result = smb_request_ok(req, SMBsetatr, 0, 0);
+ if (result < 0)
+ goto out_free;
+ result = 0;
+
+out_free:
+ smb_rput(req);
+out:
+ return result;
+}
+
+/*
+ * Because of bugs in the trans2 setattr messages, we must set
+ * attributes and timestamps separately. The core SMBsetatr
+ * message seems to be the only reliable way to set attributes.
+ */
+int
+smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr)
+{
+ struct smb_sb_info *server = server_from_dentry(dir);
+ int result;
+
+ VERBOSE("setting %s/%s, open=%d\n",
+ DENTRY_PATH(dir), smb_is_open(dir->d_inode));
+ result = smb_proc_setattr_core(server, dir, fattr->attr);
+ return result;
+}
+
+/*
+ * Sets the timestamps for an file open with write permissions.
+ */
+static int
+smb_proc_setattr_ext(struct smb_sb_info *server,
+ struct inode *inode, struct smb_fattr *fattr)
+{
+ __u16 date, time;
+ int result;
+ struct smb_request *req;
+
+ result = -ENOMEM;
+ if (! (req = smb_alloc_request(server, 0)))
+ goto out;
+
+ smb_setup_header(req, SMBsetattrE, 7, 0);
+ WSET(req->rq_header, smb_vwv0, SMB_I(inode)->fileid);
+ /* We don't change the creation time */
+ WSET(req->rq_header, smb_vwv1, 0);
+ WSET(req->rq_header, smb_vwv2, 0);
+ date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
+ WSET(req->rq_header, smb_vwv3, date);
+ WSET(req->rq_header, smb_vwv4, time);
+ date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
+ WSET(req->rq_header, smb_vwv5, date);
+ WSET(req->rq_header, smb_vwv6, time);
+#ifdef SMBFS_DEBUG_TIMESTAMP
+ printk(KERN_DEBUG "smb_proc_setattr_ext: date=%d, time=%d, mtime=%ld\n",
+ date, time, fattr->f_mtime);
+#endif
+
+ req->rq_flags |= SMB_REQ_NORETRY;
+ result = smb_request_ok(req, SMBsetattrE, 0, 0);
+ if (result < 0)
+ goto out_free;
+ result = 0;
+out_free:
+ smb_rput(req);
+out:
+ return result;
+}
+
+/*
+ * Bugs Noted:
+ * (1) The TRANSACT2_SETPATHINFO message under Win NT 4.0 doesn't
+ * set the file's attribute flags.
+ */
+static int
+smb_proc_setattr_trans2(struct smb_sb_info *server,
+ struct dentry *dir, struct smb_fattr *fattr)
+{
+ __u16 date, time;
+ char *p, *param;
+ int result;
+ char data[26];
+ struct smb_request *req;
+
+ result = -ENOMEM;
+ if (! (req = smb_alloc_request(server, PAGE_SIZE)))
+ goto out;
+ param = req->rq_buffer;
+
+ WSET(param, 0, 1); /* Info level SMB_INFO_STANDARD */
+ DSET(param, 2, 0);
+ result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL);
+ if (result < 0)
+ goto out_free;
+ p = param + 6 + result;
+
+ WSET(data, 0, 0); /* creation time */
+ WSET(data, 2, 0);
+ date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time);
+ WSET(data, 4, date);
+ WSET(data, 6, time);
+ date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time);
+ WSET(data, 8, date);
+ WSET(data, 10, time);
+#ifdef SMBFS_DEBUG_TIMESTAMP
+ printk(KERN_DEBUG "setattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n",
+ DENTRY_PATH(dir), date, time, fattr->f_mtime);
+#endif
+ DSET(data, 12, 0); /* size */
+ DSET(data, 16, 0); /* blksize */
+ WSET(data, 20, 0); /* attr */
+ DSET(data, 22, 0); /* ULONG EA size */
+
+ req->rq_trans2_command = TRANSACT2_SETPATHINFO;
+ req->rq_ldata = 26;
+ req->rq_data = data;
+ req->rq_lparm = p - param;
+ req->rq_parm = param;
+ req->rq_flags = 0;
+ result = smb_add_request(req);
+ if (result < 0)
+ goto out_free;
+ result = 0;
+ if (req->rq_rcls != 0)
+ result = smb_errno(req);
+
+out_free:
+ smb_rput(req);
+out:
+ return result;
+}
+
+/*
+ * ATTR_MODE 0x001
+ * ATTR_UID 0x002
+ * ATTR_GID 0x004
+ * ATTR_SIZE 0x008
+ * ATTR_ATIME 0x010
+ * ATTR_MTIME 0x020
+ * ATTR_CTIME 0x040
+ * ATTR_ATIME_SET 0x080
+ * ATTR_MTIME_SET 0x100
+ * ATTR_FORCE 0x200
+ * ATTR_ATTR_FLAG 0x400
+ *
+ * major/minor should only be set by mknod.
+ */
+int
+smb_proc_setattr_unix(struct dentry *d, struct iattr *attr,
+ unsigned int major, unsigned int minor)
+{
+ struct smb_sb_info *server = server_from_dentry(d);
+ u64 nttime;
+ char *p, *param;
+ int result;
+ char data[100];
+ struct smb_request *req;
+
+ result = -ENOMEM;
+ if (! (req = smb_alloc_request(server, PAGE_SIZE)))
+ goto out;
+ param = req->rq_buffer;
+
+ DEBUG1("valid flags = 0x%04x\n", attr->ia_valid);
+
+ WSET(param, 0, SMB_SET_FILE_UNIX_BASIC);
+ DSET(param, 2, 0);
+ result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL);
+ if (result < 0)
+ goto out_free;
+ p = param + 6 + result;
+
+ /* 0 L file size in bytes */
+ /* 8 L file size on disk in bytes (block count) */
+ /* 40 L uid */
+ /* 48 L gid */
+ /* 56 W file type enum */
+ /* 60 L devmajor */
+ /* 68 L devminor */
+ /* 76 L unique ID (inode) */
+ /* 84 L permissions */
+ /* 92 L link count */
+ LSET(data, 0, SMB_SIZE_NO_CHANGE);
+ LSET(data, 8, SMB_SIZE_NO_CHANGE);
+ LSET(data, 16, SMB_TIME_NO_CHANGE);
+ LSET(data, 24, SMB_TIME_NO_CHANGE);
+ LSET(data, 32, SMB_TIME_NO_CHANGE);
+ LSET(data, 40, SMB_UID_NO_CHANGE);
+ LSET(data, 48, SMB_GID_NO_CHANGE);
+ DSET(data, 56, smb_filetype_from_mode(attr->ia_mode));
+ LSET(data, 60, major);
+ LSET(data, 68, minor);
+ LSET(data, 76, 0);
+ LSET(data, 84, SMB_MODE_NO_CHANGE);
+ LSET(data, 92, 0);
+
+ if (attr->ia_valid & ATTR_SIZE) {
+ LSET(data, 0, attr->ia_size);
+ LSET(data, 8, 0); /* can't set anyway */
+ }
+
+ /*
+ * FIXME: check the conversion function it the correct one
+ *
+ * we can't set ctime but we might as well pass this to the server
+ * and let it ignore it.
+ */
+ if (attr->ia_valid & ATTR_CTIME) {
+ nttime = smb_unixutc2ntutc(attr->ia_ctime);
+ LSET(data, 16, nttime);
+ }
+ if (attr->ia_valid & ATTR_ATIME) {
+ nttime = smb_unixutc2ntutc(attr->ia_atime);
+ LSET(data, 24, nttime);
+ }
+ if (attr->ia_valid & ATTR_MTIME) {
+ nttime = smb_unixutc2ntutc(attr->ia_mtime);
+ LSET(data, 32, nttime);
+ }
+
+ if (attr->ia_valid & ATTR_UID) {
+ LSET(data, 40, attr->ia_uid);
+ }
+ if (attr->ia_valid & ATTR_GID) {
+ LSET(data, 48, attr->ia_gid);
+ }
+
+ if (attr->ia_valid & ATTR_MODE) {
+ LSET(data, 84, attr->ia_mode);
+ }
+
+ req->rq_trans2_command = TRANSACT2_SETPATHINFO;
+ req->rq_ldata = 100;
+ req->rq_data = data;
+ req->rq_lparm = p - param;
+ req->rq_parm = param;
+ req->rq_flags = 0;
+ result = smb_add_request(req);
+
+out_free:
+ smb_rput(req);
+out:
+ return result;
+}
+
+
+/*
+ * Set the modify and access timestamps for a file.
+ *
+ * Incredibly enough, in all of SMB there is no message to allow
+ * setting both attributes and timestamps at once.
+ *
+ * Bugs Noted:
+ * (1) Win 95 doesn't support the TRANSACT2_SETFILEINFO message
+ * with info level 1 (INFO_STANDARD).
+ * (2) Win 95 seems not to support setting directory timestamps.
+ * (3) Under the core protocol apparently the only way to set the
+ * timestamp is to open and close the file.
+ */
+int
+smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr)
+{
+ struct smb_sb_info *server = server_from_dentry(dentry);
+ struct inode *inode = dentry->d_inode;
+ int result;
+
+ VERBOSE("setting %s/%s, open=%d\n",
+ DENTRY_PATH(dentry), smb_is_open(inode));
+
+ /* setting the time on a Win95 server fails (tridge) */
+ if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2 &&
+ !(server->mnt->flags & SMB_MOUNT_WIN95)) {
+ if (smb_is_open(inode) && SMB_I(inode)->access != SMB_O_RDONLY)
+ result = smb_proc_setattr_ext(server, inode, fattr);
+ else
+ result = smb_proc_setattr_trans2(server, dentry, fattr);
+ } else {
+ /*
+ * Fail silently on directories ... timestamp can't be set?
+ */
+ result = 0;
+ if (S_ISREG(inode->i_mode)) {
+ /*
+ * Set the mtime by opening and closing the file.
+ * Note that the file is opened read-only, but this
+ * still allows us to set the date (tridge)
+ */
+ result = -EACCES;
+ if (!smb_is_open(inode))
+ smb_proc_open(server, dentry, SMB_O_RDONLY);
+ if (smb_is_open(inode)) {
+ inode->i_mtime = fattr->f_mtime;
+ result = smb_proc_close_inode(server, inode);
+ }
+ }
+ }
+
+ return result;
+}
+
+int
+smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr)
+{
+ struct smb_sb_info *server = SMB_SB(dentry->d_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);
+}
projects / mv-sheeva.git / blobdiff