Wei Liu <wei.l...@citrix.com> writes: > On Fri, Jan 08, 2016 at 02:00:31PM +0530, Aneesh Kumar K.V wrote: >> Wei Liu <wei.l...@citrix.com> writes: >> >> > And make v9fs_pack static function. Now we only need to export >> > v9fs_{,un}marshal to device. >> > >> > Signed-off-by: Wei Liu <wei.l...@citrix.com> >> > --- >> > fsdev/virtio-9p-marshal.c | 4 ++-- >> > fsdev/virtio-9p-marshal.h | 3 --- >> > hw/9pfs/virtio-9p.c | 21 +++++++++++++-------- >> > 3 files changed, 15 insertions(+), 13 deletions(-) >> > >> > diff --git a/fsdev/virtio-9p-marshal.c b/fsdev/virtio-9p-marshal.c >> > index c3ac316..d120bd2 100644 >> > --- a/fsdev/virtio-9p-marshal.c >> > +++ b/fsdev/virtio-9p-marshal.c >> > @@ -70,8 +70,8 @@ static ssize_t v9fs_unpack(void *dst, struct iovec >> > *out_sg, int out_num, >> > return v9fs_packunpack(dst, out_sg, out_num, offset, size, 0); >> > } >> > >> > -ssize_t v9fs_pack(struct iovec *in_sg, int in_num, size_t offset, >> > - const void *src, size_t size) >> > +static ssize_t v9fs_pack(struct iovec *in_sg, int in_num, size_t offset, >> > + const void *src, size_t size) >> > { >> > return v9fs_packunpack((void *)src, in_sg, in_num, offset, size, 1); >> > } >> > diff --git a/fsdev/virtio-9p-marshal.h b/fsdev/virtio-9p-marshal.h >> > index 0709bcd..766a48e 100644 >> > --- a/fsdev/virtio-9p-marshal.h >> > +++ b/fsdev/virtio-9p-marshal.h >> > @@ -3,9 +3,6 @@ >> > >> > #include "9p-marshal.h" >> > >> > - >> > -ssize_t v9fs_pack(struct iovec *in_sg, int in_num, size_t offset, >> > - const void *src, size_t size); >> > ssize_t v9fs_unmarshal(struct iovec *out_sg, int out_num, size_t offset, >> > int bswap, const char *fmt, ...); >> > ssize_t v9fs_marshal(struct iovec *in_sg, int in_num, size_t offset, >> > diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c >> > index 30ff828..654c103 100644 >> > --- a/hw/9pfs/virtio-9p.c >> > +++ b/hw/9pfs/virtio-9p.c >> > @@ -1561,6 +1561,7 @@ static int v9fs_xattr_read(V9fsState *s, V9fsPDU >> > *pdu, V9fsFidState *fidp, >> > size_t offset = 7; >> > int read_count; >> > int64_t xattr_len; >> > + V9fsBlob blob; >> > >> > xattr_len = fidp->fs.xattr.len; >> > read_count = xattr_len - off; >> > @@ -1572,14 +1573,18 @@ static int v9fs_xattr_read(V9fsState *s, V9fsPDU >> > *pdu, V9fsFidState *fidp, >> > */ >> > read_count = 0; >> > } >> > - err = pdu_marshal(pdu, offset, "d", read_count); >> > - if (err < 0) { >> > - return err; >> > - } >> > - offset += err; >> > - err = v9fs_pack(pdu->elem.in_sg, pdu->elem.in_num, offset, >> > - ((char *)fidp->fs.xattr.value) + off, >> > - read_count); >> > + >> > + v9fs_blob_init(&blob); >> > + >> > + blob.data = g_malloc(read_count); >> > + memcpy(blob.data, ((char *)fidp->fs.xattr.value) + off, >> > + read_count); >> > + blob.size = read_count; >> > + >> > + err = pdu_marshal(pdu, offset, "dB", read_count, &blob); >> >> Is this correct ? >> >> earlier we had read_count <data> >> now we have >> read_count, <blob> which is read_count, blob->size, data >> > > Yes, you're right. There is an error. > > The new code should be > > err = pdu_marshal(pdu, offset, "B", &blob); > > Thanks for your careful review. >
We would then need 'B' to encode size as int ie, 'd' instead of 'w' -aneesh