diff options
Diffstat (limited to 'net/9p/protocol.c')
| -rw-r--r-- | net/9p/protocol.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/net/9p/protocol.c b/net/9p/protocol.c index 1e308f210928..2ce515b859b3 100644 --- a/net/9p/protocol.c +++ b/net/9p/protocol.c @@ -114,6 +114,26 @@ pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size) return size - len; } +static size_t +pdu_write_urw(struct p9_fcall *pdu, const char *kdata, const char __user *udata, + size_t size) +{ + BUG_ON(pdu->size > P9_IOHDRSZ); + pdu->pubuf = (char __user *)udata; + pdu->pkbuf = (char *)kdata; + pdu->pbuf_size = size; + return 0; +} + +static size_t +pdu_write_readdir(struct p9_fcall *pdu, const char *kdata, size_t size) +{ + BUG_ON(pdu->size > P9_READDIRHDRSZ); + pdu->pkbuf = (char *)kdata; + pdu->pbuf_size = size; + return 0; +} + /* b - int8_t w - int16_t @@ -445,6 +465,25 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt, errcode = -EFAULT; } break; + case 'E':{ + int32_t cnt = va_arg(ap, int32_t); + const char *k = va_arg(ap, const void *); + const char *u = va_arg(ap, const void *); + errcode = p9pdu_writef(pdu, proto_version, "d", + cnt); + if (!errcode && pdu_write_urw(pdu, k, u, cnt)) + errcode = -EFAULT; + } + break; + case 'F':{ + int32_t cnt = va_arg(ap, int32_t); + const char *k = va_arg(ap, const void *); + errcode = p9pdu_writef(pdu, proto_version, "d", + cnt); + if (!errcode && pdu_write_readdir(pdu, k, cnt)) + errcode = -EFAULT; + } + break; case 'U':{ int32_t count = va_arg(ap, int32_t); const char __user *udata = @@ -579,6 +618,7 @@ EXPORT_SYMBOL(p9stat_read); int p9pdu_prepare(struct p9_fcall *pdu, int16_t tag, int8_t type) { + pdu->id = type; return p9pdu_writef(pdu, 0, "dbw", 0, type, tag); } @@ -606,6 +646,10 @@ void p9pdu_reset(struct p9_fcall *pdu) { pdu->offset = 0; pdu->size = 0; + pdu->private = NULL; + pdu->pubuf = NULL; + pdu->pkbuf = NULL; + pdu->pbuf_size = 0; } int p9dirent_read(char *buf, int len, struct p9_dirent *dirent, |