[PATCH 10/29] tools/xenlogd: add 9pfs clunk request support

[Juergen Gross <jgross@xxxxxxxx>]

Add the clunk request of the 9pfs protocol.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 tools/xenlogd/io.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/tools/xenlogd/io.c b/tools/xenlogd/io.c
index c2b259f42e..2607095e51 100644
--- a/tools/xenlogd/io.c
+++ b/tools/xenlogd/io.c
@@ -31,6 +31,7 @@
 #define P9_CMD_ERROR      107
 #define P9_CMD_WALK       110
 #define P9_CMD_OPEN       112
+#define P9_CMD_CLUNK      120
 
 /* P9 protocol open flags. */
 #define P9_OREAD            0   /* read */
@@ -860,6 +861,38 @@ static void p9_open(device *device, struct p9_header *hdr)
     fill_buffer(device, hdr->cmd + 1, hdr->tag, "QU", &qid, &iounit);
 }
 
+static void p9_clunk(device *device, struct p9_header *hdr)
+{
+    uint32_t fid;
+    struct p9_fid *fidp;
+    int ret;
+
+    ret = fill_data(device, "U", &fid);
+    if ( ret != 1 )
+    {
+        p9_error(device, hdr->tag, EINVAL);
+        return;
+    }
+
+    fidp = find_fid(device, fid);
+    if ( !fidp )
+    {
+        p9_error(device, hdr->tag, ENOENT);
+        return;
+    }
+
+    if ( fidp->opened )
+    {
+        close(fidp->fd);
+        if ( fidp->mode & P9_OREMOVE )
+            unlink(fidp->path);
+    }
+
+    free_fid(device, fidp);
+
+    fill_buffer(device, hdr->cmd + 1, hdr->tag, "");
+}
+
 void *io_thread(void *arg)
 {
     device *device = arg;
@@ -931,6 +964,10 @@ void *io_thread(void *arg)
                 p9_open(device, &hdr);
                 break;
 
+            case P9_CMD_CLUNK:
+                p9_clunk(device, &hdr);
+                break;
+
             default:
                 syslog(LOG_DEBUG, "%u.%u sent unhandled command %u\n",
                        device->domid, device->devid, hdr.cmd);
-- 
2.35.3