[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 13/29] tools/xenlogd: add 9pfs write request support
Add the write request of the 9pfs protocol. Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Reviewed-by: Jason Andryuk <jandryuk@xxxxxxxxx> --- tools/xen-9pfsd/io.c | 54 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/tools/xen-9pfsd/io.c b/tools/xen-9pfsd/io.c index e5abd25857..f8d981c2a6 100644 --- a/tools/xen-9pfsd/io.c +++ b/tools/xen-9pfsd/io.c @@ -32,6 +32,7 @@ #define P9_CMD_WALK 110 #define P9_CMD_OPEN 112 #define P9_CMD_CREATE 114 +#define P9_CMD_WRITE 118 #define P9_CMD_CLUNK 120 #define P9_CMD_STAT 124 @@ -1119,6 +1120,55 @@ static void p9_create(struct ring *ring, struct p9_header *hdr) free_fid(device, fidp); } +static void p9_write(struct ring *ring, struct p9_header *hdr) +{ + device *device = ring->device; + uint32_t fid; + uint64_t off; + unsigned int len; + uint32_t written; + void *buf; + struct p9_fid *fidp; + int ret; + + ret = fill_data(ring, "ULD", &fid, &off, &len, ring->buffer); + if ( ret != 3 ) + { + p9_error(ring, hdr->tag, EINVAL); + return; + } + + fidp = get_fid_ref(device, fid); + if ( !fidp || !fidp->opened || fidp->isdir ) + { + p9_error(ring, hdr->tag, EBADF); + goto out; + } + + buf = ring->buffer; + + while ( len != 0 ) + { + ret = pwrite(fidp->fd, buf, len, off); + if ( ret < 0 ) + break; + len -= ret; + buf += ret; + off += ret; + } + + written = buf - ring->buffer; + if ( written == 0 ) + { + p9_error(ring, hdr->tag, errno); + goto out; + } + fill_buffer(ring, hdr->cmd + 1, hdr->tag, "U", &written); + + out: + free_fid(device, fidp); +} + static void p9_clunk(struct ring *ring, struct p9_header *hdr) { device *device = ring->device; @@ -1299,6 +1349,10 @@ void *io_thread(void *arg) p9_create(ring, &hdr); break; + case P9_CMD_WRITE: + p9_write(ring, &hdr); + break; + case P9_CMD_CLUNK: p9_clunk(ring, &hdr); break; -- 2.35.3
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