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;
}
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;
}
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;
}
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;
}
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;
}
}
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;
}
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;
}
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;
}
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 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;
}
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;
}
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;
}
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 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;
}
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;
}
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;
}