mirror of https://gitlab.com/qemu-project/qemu
hw/9pfs: Reset server state during TVERSION
As per the 9p rfc, during TVERSION its necessary to clean all the active fids, so that we start the session from a clean state. Its also needed in scenarios where the guest is booting off 9p, and boot fails, and client restarts, without any knowledge of the past, it will issue a TVERSION again so this ensures that we always start from a clean state. Signed-off-by: Deepak C Shetty <deepakcs@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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@ -523,6 +523,30 @@ static int v9fs_mark_fids_unreclaim(V9fsPDU *pdu, V9fsPath *path)
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return 0;
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return 0;
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}
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}
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static void virtfs_reset(V9fsPDU *pdu)
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{
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V9fsState *s = pdu->s;
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V9fsFidState *fidp = NULL;
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/* Free all fids */
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while (s->fid_list) {
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fidp = s->fid_list;
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s->fid_list = fidp->next;
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if (fidp->ref) {
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fidp->clunked = 1;
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} else {
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free_fid(pdu, fidp);
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}
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}
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if (fidp) {
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/* One or more unclunked fids found... */
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error_report("9pfs:%s: One or more uncluncked fids "
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"found during reset", __func__);
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}
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return;
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}
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#define P9_QID_TYPE_DIR 0x80
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#define P9_QID_TYPE_DIR 0x80
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#define P9_QID_TYPE_SYMLINK 0x02
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#define P9_QID_TYPE_SYMLINK 0x02
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@ -1196,6 +1220,8 @@ static void v9fs_version(void *opaque)
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pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
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pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
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trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data);
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trace_v9fs_version(pdu->tag, pdu->id, s->msize, version.data);
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virtfs_reset(pdu);
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if (!strcmp(version.data, "9P2000.u")) {
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if (!strcmp(version.data, "9P2000.u")) {
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s->proto_version = V9FS_PROTO_2000U;
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s->proto_version = V9FS_PROTO_2000U;
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} else if (!strcmp(version.data, "9P2000.L")) {
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} else if (!strcmp(version.data, "9P2000.L")) {
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