proc.c

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 */
static int
smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
			struct smb_fattr *fattr)
{
	char *param = server->temp_buf, *mask = param + 12;
	__u16 date, time;
	unsigned char *resp_data = NULL;
	unsigned char *resp_param = NULL;
	int resp_data_len = 0;
	int resp_param_len = 0;
	int mask_len, result;

retry:
	mask_len = smb_encode_path(server, mask, SMB_MAXNAMELEN+1, dentry, NULL);
	if (mask_len < 0) {
		result = mask_len;
		goto out;
	}
	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);

	result = smb_trans2_request(server, TRANSACT2_FINDFIRST,
				    0, NULL, 12 + mask_len, param,
				    &resp_data_len, &resp_data,
				    &resp_param_len, &resp_param);
	if (result < 0)
	{
		if (smb_retry(server))
			goto retry;
		goto out;
	}
	if (server->rcls != 0)
	{ 
		result = smb_errno(server);
#ifdef SMBFS_PARANOIA
		if (result != -ENOENT)
			PARANOIA("error for %s, rcls=%d, err=%d\n",
				 mask, server->rcls, server->err);
#endif
		goto out;
	}
	/* Make sure we got enough data ... */
	result = -EINVAL;
	if (resp_data_len < 22 || WVAL(resp_param, 2) != 1)
	{
		PARANOIA("bad result for %s, len=%d, count=%d\n",
			 mask, resp_data_len, WVAL(resp_param, 2));
		goto out;
	}

	/*
	 * Decode the response into the fattr ...
	 */
	date = WVAL(resp_data, 0);
	time = WVAL(resp_data, 2);
	fattr->f_ctime = date_dos2unix(server, date, time);

	date = WVAL(resp_data, 4);
	time = WVAL(resp_data, 6);
	fattr->f_atime = date_dos2unix(server, date, time);

	date = WVAL(resp_data, 8);
	time = WVAL(resp_data, 10);
	fattr->f_mtime = date_dos2unix(server, date, time);
	VERBOSE("name=%s, date=%x, time=%x, mtime=%ld\n",
		mask, date, time, fattr->f_mtime);
	fattr->f_size = DVAL(resp_data, 12);
	/* ULONG allocation size */
	fattr->attr = WVAL(resp_data, 20);
	result = 0;

out:
	return result;
}

/*
 * Note: called with the server locked.
 */
static int
smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir,
		      struct smb_fattr *fattr)
{
	int result;
	char *p;

      retry:
	p = smb_setup_header(server, SMBgetatr, 0, 0);
	result = smb_simple_encode_path(server, &p, dir, NULL);
	if (result < 0)
		goto out;
	smb_setup_bcc(server, p);

	if ((result = smb_request_ok(server, SMBgetatr, 10, 0)) < 0)
	{
		if (smb_retry(server))
			goto retry;
		goto out;
	}
	fattr->attr    = WVAL(server->packet, smb_vwv0);
	fattr->f_mtime = local2utc(server, DVAL(server->packet, smb_vwv1));
	fattr->f_size  = DVAL(server->packet, 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:
	return result;
}

/*
 * Note: called with the server locked.
 *
 * 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_fattr *attr)
{
	char *p, *param = server->temp_buf;
	__u16 date, time;
	int off_date = 0, off_time = 2;
	unsigned char *resp_data = NULL;
	unsigned char *resp_param = NULL;
	int resp_data_len = 0;
	int resp_param_len = 0;
	int result;

      retry:
	WSET(param, 0, 1);	/* Info level SMB_INFO_STANDARD */
	DSET(param, 2, 0);
	result = smb_encode_path(server, param+6, SMB_MAXNAMELEN+1, dir, NULL);
	if (result < 0)
		goto out;
	p = param + 6 + result;

	result = smb_trans2_request(server, TRANSACT2_QPATHINFO,
				    0, NULL, p - param, param,
				    &resp_data_len, &resp_data,
				    &resp_param_len, &resp_param);
	if (result < 0)
	{
		if (smb_retry(server))
			goto retry;
		goto out;
	}
	if (server->rcls != 0)
	{
		VERBOSE("for %s: result=%d, rcls=%d, err=%d\n",
			&param[6], result, server->rcls, server->err);
		result = smb_errno(server);
		goto out;
	}
	result = -ENOENT;
	if (resp_data_len < 22)
	{
		PARANOIA("not enough data for %s, len=%d\n",
			 &param[6], resp_data_len);
		goto out;
	}

	/*
	 * 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(resp_data, off_date);
	time = WVAL(resp_data, off_time);
	attr->f_ctime = date_dos2unix(server, date, time);

	date = WVAL(resp_data, 4 + off_date);
	time = WVAL(resp_data, 4 + off_time);
	attr->f_atime = date_dos2unix(server, date, time);

	date = WVAL(resp_data, 8 + off_date);
	time = WVAL(resp_data, 8 + off_time);
	attr->f_mtime = date_dos2unix(server, date, time);
#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(resp_data, 12);
	attr->attr = WVAL(resp_data, 20);
	result = 0;

out:
	return result;
}

/*
 * Note: called with the server locked
 */
static int
smb_proc_do_getattr(struct smb_sb_info *server, struct dentry *dir,
		    struct smb_fattr *fattr)
{
	int result;
	struct inode *inode = dir->d_inode;

	smb_init_dirent(server, fattr);

	/*
	 * Select whether to use core or trans2 getattr.
	 * Win 95 appears to break with the trans2 getattr.
 	 */
	if (server->opt.protocol < SMB_PROTOCOL_LANMAN2 ||
	    (server->mnt->flags & (SMB_MOUNT_OLDATTR|SMB_MOUNT_WIN95)) ) {
		result = smb_proc_getattr_core(server, dir, fattr);
	} else {
		if (server->mnt->flags & SMB_MOUNT_DIRATTR)
			result = smb_proc_getattr_ff(server, dir, fattr);
		else
			result = smb_proc_getattr_trans2(server, dir, fattr);
	}

	/*
	 * 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 (server->mnt->flags & SMB_MOUNT_WIN95 &&
	    inode &&
	    inode->u.smbfs_i.flags & SMB_F_LOCALWRITE &&
	    smb_is_open(inode))
	{
		__u16 fileid = inode->u.smbfs_i.fileid;
		fattr->f_size = smb_proc_seek(server, fileid, 2, 0);
	}

	smb_finish_dirent(server, fattr);
	return result;
}

int
smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr)
{
	struct smb_sb_info *server = server_from_dentry(dir);
	int result;

	smb_lock_server(server);
	result = smb_proc_do_getattr(server, dir, fattr);
	smb_unlock_server(server);
	return result;
}


/*
 * Called with the server locked. 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;

      retry:
	p = smb_setup_header(server, SMBsetatr, 8, 0);
	WSET(server->packet, smb_vwv0, attr);
	DSET(server->packet, smb_vwv1, 0); /* mtime */
	WSET(server->packet, smb_vwv3, 0); /* reserved values */
	WSET(server->packet, smb_vwv4, 0);
	WSET(server->packet, smb_vwv5, 0);
	WSET(server->packet, smb_vwv6, 0);
	WSET(server->packet, smb_vwv7, 0);
	result = smb_simple_encode_path(server, &p, dentry, NULL);
	if (result < 0)
		goto out;
	if (p + 2 > (char *)server->packet + server->packet_size) {
		result = -ENAMETOOLONG;
		goto out;
	}
	*p++ = 4;
	*p++ = 0;
	smb_setup_bcc(server, p);

	result = smb_request_ok(server, SMBsetatr, 0, 0);
	if (result < 0) {
		if (smb_retry(server))
			goto retry;
		goto out;
	}
	result = 0;
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));
	smb_lock_server(server);
	result = smb_proc_setattr_core(server, dir, fattr->attr);
	smb_unlock_server(server);
	return result;
}

/*
 * Called with the server locked. 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;

      retry:
	smb_setup_header(server, SMBsetattrE, 7, 0);
	WSET(server->packet, smb_vwv0, inode->u.smbfs_i.fileid);
	/* We don't change the creation time */
	WSET(server->packet, smb_vwv1, 0);
	WSET(server->packet, smb_vwv2, 0);
	date_unix2dos(server, fattr->f_atime, &date, &time);
	WSET(server->packet, smb_vwv3, date);
	WSET(server->packet, smb_vwv4, time);
	date_unix2dos(server, fattr->f_mtime, &date, &time);
	WSET(server->packet, smb_vwv5, date);
	WSET(server->packet, 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

	result = smb_request_ok(server, SMBsetattrE, 0, 0);
	if (result < 0) {
		if (smb_retry(server))
			goto retry;
		goto out;
	}
	result = 0;
out:
	return result;
}

/*
 * Note: called with the server locked.
 *
 * 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 = server->temp_buf;
	unsigned char *resp_data = NULL;
	unsigned char *resp_param = NULL;
	int resp_data_len = 0;
	int resp_param_len = 0;
	int result;
	char data[26];

      retry:
	WSET(param, 0, 1);	/* Info level SMB_INFO_STANDARD */
	DSET(param, 2, 0);
	result = smb_encode_path(server, param+6, SMB_MAXNAMELEN+1, dir, NULL);
	if (result < 0)
		goto out;
	p = param + 6 + result;

	WSET(data, 0, 0); /* creation time */
	WSET(data, 2, 0);
	date_unix2dos(server, fattr->f_atime, &date, &time);
	WSET(data, 4, date);
	WSET(data, 6, time);
	date_unix2dos(server, fattr->f_mtime, &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 */

	result = smb_trans2_request(server, TRANSACT2_SETPATHINFO,
				    26, data, p - param, param,
				    &resp_data_len, &resp_data,
				    &resp_param_len, &resp_param);
	if (result < 0)
	{
		if (smb_retry(server))
			goto retry;
		goto out;
	}
	result = 0;
	if (server->rcls != 0)
		result = smb_errno(server);

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));

	smb_lock_server(server);
	/* 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) &&
		    inode->u.smbfs_i.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);
			}
		}
	}

	smb_unlock_server(server);
	return result;
}

int
smb_proc_dskattr(struct super_block *sb, struct statfs *attr)
{
	struct smb_sb_info *server = &(sb->u.smbfs_sb);
	int result;
	char *p;
	long unit;

	smb_lock_server(server);

      retry:
	smb_setup_header(server, SMBdskattr, 0, 0);

	if ((result = smb_request_ok(server, SMBdskattr, 5, 0)) < 0) {
		if (smb_retry(server))
			goto retry;
		goto out;
	}
	p = SMB_VWV(server->packet);
	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:
	smb_unlock_server(server);
	return result;
}