示例#1
0
struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat,
				      int dotu)
{
	int size, statsz;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	statsz = p9_size_wstat(wstat, dotu);
	size = 4 + 2 + 2 + statsz;	/* fid[4] stat[n] */
	fc = p9_create_common(bufp, size, P9_TWSTAT);
	if (IS_ERR(fc))
		goto error;

	p9_put_int32(bufp, fid, &fc->params.twstat.fid);
	buf_put_int16(bufp, statsz + 2);
	p9_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, dotu);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#2
0
struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count,
				      const char __user *data)
{
	int size, err;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	/* fid[4] offset[8] count[4] data[count] */
	size = 4 + 8 + 4 + count;
	fc = p9_create_common(bufp, size, P9_TWRITE);
	if (IS_ERR(fc))
		goto error;

	p9_put_int32(bufp, fid, &fc->params.twrite.fid);
	p9_put_int64(bufp, offset, &fc->params.twrite.offset);
	p9_put_int32(bufp, count, &fc->params.twrite.count);
	err = p9_put_user_data(bufp, data, count, &fc->params.twrite.data);
	if (err) {
		kfree(fc);
		fc = ERR_PTR(err);
		goto error;
	}

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#3
0
struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
	char *extension, int dotu)
{
	int size;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	/* fid[4] name[s] perm[4] mode[1] */
	size = 4 + 2 + strlen(name) + 4 + 1;
	if (dotu) {
		size += 2 +			/* extension[s] */
		    (extension == NULL ? 0 : strlen(extension));
	}

	fc = p9_create_common(bufp, size, P9_TCREATE);
	if (IS_ERR(fc))
		goto error;

	p9_put_int32(bufp, fid, &fc->params.tcreate.fid);
	p9_put_str(bufp, name, &fc->params.tcreate.name);
	p9_put_int32(bufp, perm, &fc->params.tcreate.perm);
	p9_put_int8(bufp, mode, &fc->params.tcreate.mode);
	if (dotu)
		p9_put_str(bufp, extension, &fc->params.tcreate.extension);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#4
0
struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
	char *extension, int extended)
{
	int size;
	struct v9fs_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	size = 4 + 2 + strlen(name) + 4 + 1;	/* fid[4] name[s] perm[4] mode[1] */
	if (extended && extension!=NULL)
		size += 2 + strlen(extension);	/* extension[s] */

	fc = v9fs_create_common(bufp, size, TCREATE);
	if (IS_ERR(fc))
		goto error;

	v9fs_put_int32(bufp, fid, &fc->params.tcreate.fid);
	v9fs_put_str(bufp, name, &fc->params.tcreate.name);
	v9fs_put_int32(bufp, perm, &fc->params.tcreate.perm);
	v9fs_put_int8(bufp, mode, &fc->params.tcreate.mode);
	if (extended)
		v9fs_put_str(bufp, extension, &fc->params.tcreate.extension);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
      error:
	return fc;
}
示例#5
0
static void buf_get_str(struct cbuf *buf, struct p9_str *vstr)
{
	vstr->len = buf_get_int16(buf);
	if (!buf_check_overflow(buf) && buf_check_size(buf, vstr->len)) {
		vstr->str = buf->p;
		buf->p += vstr->len;
	} else {
		vstr->len = 0;
		vstr->str = NULL;
	}
}
示例#6
0
int
p9_deserialize_stat(void *buf, u32 buflen, struct p9_stat *stat,
		int dotu)
{
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;
	unsigned char *p;

	buf_init(bufp, buf, buflen);
	p = bufp->p;
	buf_get_stat(bufp, stat, dotu);

	if (buf_check_overflow(bufp))
		return 0;
	else
		return bufp->p - p;
}
示例#7
0
struct p9_fcall *p9_create_tstat(u32 fid)
{
	int size;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	size = 4;		/* fid[4] */
	fc = p9_create_common(bufp, size, P9_TSTAT);
	if (IS_ERR(fc))
		goto error;

	p9_put_int32(bufp, fid, &fc->params.tstat.fid);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#8
0
struct p9_fcall *p9_create_tflush(u16 oldtag)
{
	int size;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	size = 2;		/* oldtag[2] */
	fc = p9_create_common(bufp, size, P9_TFLUSH);
	if (IS_ERR(fc))
		goto error;

	p9_put_int16(bufp, oldtag, &fc->params.tflush.oldtag);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#9
0
struct v9fs_fcall *v9fs_create_tremove(u32 fid)
{
	int size;
	struct v9fs_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	size = 4;		/* fid[4] */
	fc = v9fs_create_common(bufp, size, TREMOVE);
	if (IS_ERR(fc))
		goto error;

	v9fs_put_int32(bufp, fid, &fc->params.tremove.fid);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
      error:
	return fc;
}
示例#10
0
struct p9_fcall *p9_create_topen(u32 fid, u8 mode)
{
	int size;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	size = 4 + 1;		/* fid[4] mode[1] */
	fc = p9_create_common(bufp, size, P9_TOPEN);
	if (IS_ERR(fc))
		goto error;

	p9_put_int32(bufp, fid, &fc->params.topen.fid);
	p9_put_int8(bufp, mode, &fc->params.topen.mode);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#11
0
struct p9_fcall *p9_create_tversion(u32 msize, char *version)
{
	int size;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	size = 4 + 2 + strlen(version);	/* msize[4] version[s] */
	fc = p9_create_common(bufp, size, P9_TVERSION);
	if (IS_ERR(fc))
		goto error;

	p9_put_int32(bufp, msize, &fc->params.tversion.msize);
	p9_put_str(bufp, version, &fc->params.tversion.version);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#12
0
struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count)
{
	int size;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	size = 4 + 8 + 4;	/* fid[4] offset[8] count[4] */
	fc = p9_create_common(bufp, size, P9_TREAD);
	if (IS_ERR(fc))
		goto error;

	p9_put_int32(bufp, fid, &fc->params.tread.fid);
	p9_put_int64(bufp, offset, &fc->params.tread.offset);
	p9_put_int32(bufp, count, &fc->params.tread.count);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#13
0
struct v9fs_fcall *v9fs_create_tauth(u32 afid, char *uname, char *aname)
{
	int size;
	struct v9fs_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	size = 4 + 2 + strlen(uname) + 2 + strlen(aname);	/* afid[4] uname[s] aname[s] */
	fc = v9fs_create_common(bufp, size, TAUTH);
	if (IS_ERR(fc))
		goto error;

	v9fs_put_int32(bufp, afid, &fc->params.tauth.afid);
	v9fs_put_str(bufp, uname, &fc->params.tauth.uname);
	v9fs_put_str(bufp, aname, &fc->params.tauth.aname);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
      error:
	return fc;
}
示例#14
0
struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname,
				     char **wnames)
{
	int i, size;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	if (nwname > P9_MAXWELEM) {
		P9_DPRINTK(P9_DEBUG_ERROR, "nwname > %d\n", P9_MAXWELEM);
		return NULL;
	}

	size = 4 + 4 + 2;	/* fid[4] newfid[4] nwname[2] ... */
	for (i = 0; i < nwname; i++) {
		size += 2 + strlen(wnames[i]);	/* wname[s] */
	}

	fc = p9_create_common(bufp, size, P9_TWALK);
	if (IS_ERR(fc))
		goto error;

	p9_put_int32(bufp, fid, &fc->params.twalk.fid);
	p9_put_int32(bufp, newfid, &fc->params.twalk.newfid);
	p9_put_int16(bufp, nwname, &fc->params.twalk.nwname);
	for (i = 0; i < nwname; i++) {
		p9_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]);
	}

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#15
0
struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname,
	u32 n_uname, int dotu)
{
	int size;
	struct p9_fcall *fc;
	struct cbuf buffer;
	struct cbuf *bufp = &buffer;

	/* afid[4] uname[s] aname[s] */
	size = 4 + 2 + 2;
	if (uname)
		size += strlen(uname);

	if (aname)
		size += strlen(aname);

	if (dotu)
		size += 4;	/* n_uname */

	fc = p9_create_common(bufp, size, P9_TAUTH);
	if (IS_ERR(fc))
		goto error;

	p9_put_int32(bufp, afid, &fc->params.tauth.afid);
	p9_put_str(bufp, uname, &fc->params.tauth.uname);
	p9_put_str(bufp, aname, &fc->params.tauth.aname);
	if (dotu)
		p9_put_int32(bufp, n_uname, &fc->params.tauth.n_uname);

	if (buf_check_overflow(bufp)) {
		kfree(fc);
		fc = ERR_PTR(-ENOMEM);
	}
error:
	return fc;
}
示例#16
0
int
p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *rcall,
		       int dotu)
{

	struct cbuf buffer;
	struct cbuf *bufp = &buffer;
	int i = 0;

	buf_init(bufp, buf, buflen);

	rcall->size = buf_get_int32(bufp);
	rcall->id = buf_get_int8(bufp);
	rcall->tag = buf_get_int16(bufp);

	P9_DPRINTK(P9_DEBUG_CONV, "size %d id %d tag %d\n", rcall->size,
							rcall->id, rcall->tag);

	switch (rcall->id) {
	default:
		P9_EPRINTK(KERN_ERR, "unknown message type: %d\n", rcall->id);
		return -EPROTO;
	case P9_RVERSION:
		rcall->params.rversion.msize = buf_get_int32(bufp);
		buf_get_str(bufp, &rcall->params.rversion.version);
		break;
	case P9_RFLUSH:
		break;
	case P9_RATTACH:
		rcall->params.rattach.qid.type = buf_get_int8(bufp);
		rcall->params.rattach.qid.version = buf_get_int32(bufp);
		rcall->params.rattach.qid.path = buf_get_int64(bufp);
		break;
	case P9_RWALK:
		rcall->params.rwalk.nwqid = buf_get_int16(bufp);
		if (rcall->params.rwalk.nwqid > P9_MAXWELEM) {
			P9_EPRINTK(KERN_ERR,
					"Rwalk with more than %d qids: %d\n",
					P9_MAXWELEM, rcall->params.rwalk.nwqid);
			return -EPROTO;
		}

		for (i = 0; i < rcall->params.rwalk.nwqid; i++)
			buf_get_qid(bufp, &rcall->params.rwalk.wqids[i]);
		break;
	case P9_ROPEN:
		buf_get_qid(bufp, &rcall->params.ropen.qid);
		rcall->params.ropen.iounit = buf_get_int32(bufp);
		break;
	case P9_RCREATE:
		buf_get_qid(bufp, &rcall->params.rcreate.qid);
		rcall->params.rcreate.iounit = buf_get_int32(bufp);
		break;
	case P9_RREAD:
		rcall->params.rread.count = buf_get_int32(bufp);
		rcall->params.rread.data = bufp->p;
		buf_check_size(bufp, rcall->params.rread.count);
		break;
	case P9_RWRITE:
		rcall->params.rwrite.count = buf_get_int32(bufp);
		break;
	case P9_RCLUNK:
		break;
	case P9_RREMOVE:
		break;
	case P9_RSTAT:
		buf_get_int16(bufp);
		buf_get_stat(bufp, &rcall->params.rstat.stat, dotu);
		break;
	case P9_RWSTAT:
		break;
	case P9_RERROR:
		buf_get_str(bufp, &rcall->params.rerror.error);
		if (dotu)
			rcall->params.rerror.errno = buf_get_int16(bufp);
		break;
	}

	if (buf_check_overflow(bufp)) {
		P9_DPRINTK(P9_DEBUG_ERROR, "buffer overflow\n");
		return -EIO;
	}

	return bufp->p - bufp->sp;
}