+static inline void v9fs_put_int64(struct cbuf *bufp, u64 val, u64 * p)
+{
+ *p = val;
+ buf_put_int64(bufp, val);
+}
+
+static void
+v9fs_put_str(struct cbuf *bufp, char *data, struct v9fs_str *str)
+{
+ int len;
+ char *s;
+
+ if (data)
+ len = strlen(data);
+ else
+ len = 0;
+
+ s = buf_put_stringn(bufp, data, len);
+ if (str) {
+ str->len = len;
+ str->str = s;
+ }
+}
+
+static int
+v9fs_put_user_data(struct cbuf *bufp, const char __user * data, int count,
+ unsigned char **pdata)
+{
+ *pdata = buf_alloc(bufp, count);
+ return copy_from_user(*pdata, data, count);
+}
+
+static void
+v9fs_put_wstat(struct cbuf *bufp, struct v9fs_wstat *wstat,
+ struct v9fs_stat *stat, int statsz, int extended)
+{
+ v9fs_put_int16(bufp, statsz, &stat->size);
+ v9fs_put_int16(bufp, wstat->type, &stat->type);
+ v9fs_put_int32(bufp, wstat->dev, &stat->dev);
+ v9fs_put_int8(bufp, wstat->qid.type, &stat->qid.type);
+ v9fs_put_int32(bufp, wstat->qid.version, &stat->qid.version);
+ v9fs_put_int64(bufp, wstat->qid.path, &stat->qid.path);
+ v9fs_put_int32(bufp, wstat->mode, &stat->mode);
+ v9fs_put_int32(bufp, wstat->atime, &stat->atime);
+ v9fs_put_int32(bufp, wstat->mtime, &stat->mtime);
+ v9fs_put_int64(bufp, wstat->length, &stat->length);
+
+ v9fs_put_str(bufp, wstat->name, &stat->name);
+ v9fs_put_str(bufp, wstat->uid, &stat->uid);
+ v9fs_put_str(bufp, wstat->gid, &stat->gid);
+ v9fs_put_str(bufp, wstat->muid, &stat->muid);
+
+ if (extended) {
+ v9fs_put_str(bufp, wstat->extension, &stat->extension);
+ v9fs_put_int32(bufp, wstat->n_uid, &stat->n_uid);
+ v9fs_put_int32(bufp, wstat->n_gid, &stat->n_gid);
+ v9fs_put_int32(bufp, wstat->n_muid, &stat->n_muid);
+ }
+}
+
+static struct v9fs_fcall *
+v9fs_create_common(struct cbuf *bufp, u32 size, u8 id)
+{
+ struct v9fs_fcall *fc;
+
+ size += 4 + 1 + 2; /* size[4] id[1] tag[2] */
+ fc = kmalloc(sizeof(struct v9fs_fcall) + size, GFP_KERNEL);
+ if (!fc)
+ return ERR_PTR(-ENOMEM);
+
+ fc->sdata = (char *)fc + sizeof(*fc);
+
+ buf_init(bufp, (char *)fc->sdata, size);
+ v9fs_put_int32(bufp, size, &fc->size);
+ v9fs_put_int8(bufp, id, &fc->id);
+ v9fs_put_int16(bufp, V9FS_NOTAG, &fc->tag);
+
+ return fc;
+}
+
+void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag)
+{
+ fc->tag = tag;
+ *(__le16 *) (fc->sdata + 5) = cpu_to_le16(tag);
+}
+
+struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 2 + strlen(version); /* msize[4] version[s] */
+ fc = v9fs_create_common(bufp, size, TVERSION);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, msize, &fc->params.tversion.msize);
+ v9fs_put_str(bufp, version, &fc->params.tversion.version);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+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;
+}
+
+struct v9fs_fcall *
+v9fs_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname); /* fid[4] afid[4] uname[s] aname[s] */
+ fc = v9fs_create_common(bufp, size, TATTACH);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tattach.fid);
+ v9fs_put_int32(bufp, afid, &fc->params.tattach.afid);
+ v9fs_put_str(bufp, uname, &fc->params.tattach.uname);
+ v9fs_put_str(bufp, aname, &fc->params.tattach.aname);
+
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tflush(u16 oldtag)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 2; /* oldtag[2] */
+ fc = v9fs_create_common(bufp, size, TFLUSH);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int16(bufp, oldtag, &fc->params.tflush.oldtag);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
+ char **wnames)
+{
+ int i, size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ if (nwname > V9FS_MAXWELEM) {
+ dprintk(DEBUG_ERROR, "nwname > %d\n", V9FS_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 = v9fs_create_common(bufp, size, TWALK);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.twalk.fid);
+ v9fs_put_int32(bufp, newfid, &fc->params.twalk.newfid);
+ v9fs_put_int16(bufp, nwname, &fc->params.twalk.nwname);
+ for (i = 0; i < nwname; i++) {
+ v9fs_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]);
+ }
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 1; /* fid[4] mode[1] */
+ fc = v9fs_create_common(bufp, size, TOPEN);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.topen.fid);
+ v9fs_put_int8(bufp, mode, &fc->params.topen.mode);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode)
+{
+ 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] */
+ 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 (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count)
+{
+ int size;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 8 + 4; /* fid[4] offset[8] count[4] */
+ fc = v9fs_create_common(bufp, size, TREAD);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tread.fid);
+ v9fs_put_int64(bufp, offset, &fc->params.tread.offset);
+ v9fs_put_int32(bufp, count, &fc->params.tread.count);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
+ const char __user * data)
+{
+ int size, err;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 8 + 4 + count; /* fid[4] offset[8] count[4] data[count] */
+ fc = v9fs_create_common(bufp, size, TWRITE);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.twrite.fid);
+ v9fs_put_int64(bufp, offset, &fc->params.twrite.offset);
+ v9fs_put_int32(bufp, count, &fc->params.twrite.count);
+ err = v9fs_put_user_data(bufp, data, count, &fc->params.twrite.data);
+ if (err) {
+ kfree(fc);
+ fc = ERR_PTR(err);
+ }
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_tclunk(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, TCLUNK);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tclunk.fid);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+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;
+}
+
+struct v9fs_fcall *v9fs_create_tstat(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, TSTAT);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.tstat.fid);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;
+}
+
+struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
+ int extended)
+{
+ int size, statsz;
+ struct v9fs_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ statsz = v9fs_size_wstat(wstat, extended);
+ size = 4 + 2 + 2 + statsz; /* fid[4] stat[n] */
+ fc = v9fs_create_common(bufp, size, TWSTAT);
+ if (IS_ERR(fc))
+ goto error;
+
+ v9fs_put_int32(bufp, fid, &fc->params.twstat.fid);
+ buf_put_int16(bufp, statsz + 2);
+ v9fs_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, extended);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+ error:
+ return fc;