2011-05-19 02:42:42 +04:00
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/*
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2016-06-06 12:52:34 +03:00
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* 9p backend
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2011-05-19 02:42:42 +04:00
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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2016-01-26 21:17:10 +03:00
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#include "qemu/osdep.h"
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2011-05-19 02:42:42 +04:00
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#include "fsdev/qemu-fsdev.h"
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2012-12-17 21:20:00 +04:00
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#include "qemu/thread.h"
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2015-09-01 16:48:02 +03:00
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#include "qemu/coroutine.h"
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2015-11-18 20:57:30 +03:00
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#include "coth.h"
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2011-05-19 02:42:42 +04:00
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2016-06-06 12:52:34 +03:00
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int v9fs_co_readdir(V9fsPDU *pdu, V9fsFidState *fidp, struct dirent **dent)
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2011-05-19 02:42:42 +04:00
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{
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int err;
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2011-08-02 10:06:17 +04:00
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V9fsState *s = pdu->s;
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2011-05-19 02:42:42 +04:00
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2011-08-02 10:06:17 +04:00
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if (v9fs_request_cancelled(pdu)) {
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return -EINTR;
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}
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2011-05-19 02:42:42 +04:00
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v9fs_co_run_in_worker(
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{
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2016-06-06 12:52:34 +03:00
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struct dirent *entry;
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2011-05-19 02:42:42 +04:00
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errno = 0;
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2016-06-06 12:52:34 +03:00
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entry = s->ops->readdir(&s->ctx, &fidp->fs);
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if (!entry && errno) {
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2011-05-19 02:42:42 +04:00
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err = -errno;
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} else {
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2016-06-06 12:52:34 +03:00
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*dent = entry;
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2011-05-19 02:42:42 +04:00
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err = 0;
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}
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});
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return err;
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}
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2011-08-02 10:06:17 +04:00
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off_t v9fs_co_telldir(V9fsPDU *pdu, V9fsFidState *fidp)
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2011-05-19 02:42:42 +04:00
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{
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off_t err;
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2011-08-02 10:06:17 +04:00
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V9fsState *s = pdu->s;
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2011-05-19 02:42:42 +04:00
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2011-08-02 10:06:17 +04:00
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if (v9fs_request_cancelled(pdu)) {
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return -EINTR;
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}
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2011-05-19 02:42:42 +04:00
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v9fs_co_run_in_worker(
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{
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2011-10-25 10:40:40 +04:00
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err = s->ops->telldir(&s->ctx, &fidp->fs);
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2011-05-19 02:42:42 +04:00
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if (err < 0) {
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err = -errno;
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}
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});
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return err;
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}
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2011-08-02 10:06:17 +04:00
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void v9fs_co_seekdir(V9fsPDU *pdu, V9fsFidState *fidp, off_t offset)
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2011-05-19 02:42:42 +04:00
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{
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2011-08-02 10:06:17 +04:00
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V9fsState *s = pdu->s;
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if (v9fs_request_cancelled(pdu)) {
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return;
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}
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2011-05-19 02:42:42 +04:00
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v9fs_co_run_in_worker(
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{
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2011-10-25 10:40:40 +04:00
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s->ops->seekdir(&s->ctx, &fidp->fs, offset);
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2011-05-19 02:42:42 +04:00
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});
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}
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2011-08-02 10:06:17 +04:00
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void v9fs_co_rewinddir(V9fsPDU *pdu, V9fsFidState *fidp)
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2011-05-19 02:42:42 +04:00
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{
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2011-08-02 10:06:17 +04:00
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V9fsState *s = pdu->s;
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if (v9fs_request_cancelled(pdu)) {
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return;
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}
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2011-05-19 02:42:42 +04:00
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v9fs_co_run_in_worker(
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{
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2011-10-25 10:40:40 +04:00
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s->ops->rewinddir(&s->ctx, &fidp->fs);
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2011-05-19 02:42:42 +04:00
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});
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}
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2011-08-08 22:14:24 +04:00
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2011-08-02 10:06:17 +04:00
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int v9fs_co_mkdir(V9fsPDU *pdu, V9fsFidState *fidp, V9fsString *name,
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2011-05-24 13:40:56 +04:00
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mode_t mode, uid_t uid, gid_t gid, struct stat *stbuf)
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2011-08-08 22:14:24 +04:00
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{
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int err;
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FsCred cred;
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2011-09-09 13:44:18 +04:00
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V9fsPath path;
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2011-08-02 10:06:17 +04:00
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V9fsState *s = pdu->s;
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2011-08-08 22:14:24 +04:00
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2011-08-02 10:06:17 +04:00
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if (v9fs_request_cancelled(pdu)) {
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2011-11-29 12:52:38 +04:00
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return -EINTR;
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2011-08-02 10:06:17 +04:00
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}
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2011-08-08 22:14:24 +04:00
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cred_init(&cred);
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cred.fc_mode = mode;
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cred.fc_uid = uid;
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cred.fc_gid = gid;
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2011-08-02 10:05:54 +04:00
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v9fs_path_read_lock(s);
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2011-08-08 22:14:24 +04:00
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v9fs_co_run_in_worker(
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{
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2011-09-09 13:44:18 +04:00
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err = s->ops->mkdir(&s->ctx, &fidp->path, name->data, &cred);
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2011-08-08 22:14:24 +04:00
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if (err < 0) {
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err = -errno;
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2011-05-24 13:40:56 +04:00
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} else {
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2011-09-09 13:44:18 +04:00
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v9fs_path_init(&path);
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err = v9fs_name_to_path(s, &fidp->path, name->data, &path);
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if (!err) {
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err = s->ops->lstat(&s->ctx, &path, stbuf);
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if (err < 0) {
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err = -errno;
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}
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2011-05-24 13:40:56 +04:00
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}
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2011-09-09 13:44:18 +04:00
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v9fs_path_free(&path);
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2011-08-08 22:14:24 +04:00
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}
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});
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2011-08-02 10:05:54 +04:00
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v9fs_path_unlock(s);
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2011-08-08 22:14:24 +04:00
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return err;
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}
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2011-05-07 16:42:42 +04:00
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2011-08-02 10:06:17 +04:00
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int v9fs_co_opendir(V9fsPDU *pdu, V9fsFidState *fidp)
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2011-05-07 16:42:42 +04:00
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{
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int err;
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2011-08-02 10:06:17 +04:00
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V9fsState *s = pdu->s;
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2011-05-07 16:42:42 +04:00
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2011-08-02 10:06:17 +04:00
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if (v9fs_request_cancelled(pdu)) {
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2011-11-29 12:52:38 +04:00
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return -EINTR;
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2011-08-02 10:06:17 +04:00
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}
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2011-08-02 10:05:54 +04:00
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v9fs_path_read_lock(s);
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2011-05-07 16:42:42 +04:00
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v9fs_co_run_in_worker(
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{
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2011-10-25 10:40:40 +04:00
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err = s->ops->opendir(&s->ctx, &fidp->path, &fidp->fs);
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if (err < 0) {
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2011-05-07 16:42:42 +04:00
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err = -errno;
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} else {
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err = 0;
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}
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});
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2011-08-02 10:05:54 +04:00
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v9fs_path_unlock(s);
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2011-05-18 15:38:34 +04:00
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if (!err) {
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total_open_fd++;
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if (total_open_fd > open_fd_hw) {
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2011-08-02 10:06:17 +04:00
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v9fs_reclaim_fd(pdu);
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2011-05-18 15:38:34 +04:00
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}
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}
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2011-05-07 16:42:42 +04:00
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return err;
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}
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2011-05-07 19:39:24 +04:00
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2011-10-25 10:40:40 +04:00
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int v9fs_co_closedir(V9fsPDU *pdu, V9fsFidOpenState *fs)
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2011-05-07 19:39:24 +04:00
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{
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int err;
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2011-08-02 10:06:17 +04:00
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V9fsState *s = pdu->s;
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2011-05-07 19:39:24 +04:00
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2011-08-02 10:06:17 +04:00
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if (v9fs_request_cancelled(pdu)) {
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2011-11-29 12:52:38 +04:00
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return -EINTR;
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2011-08-02 10:06:17 +04:00
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}
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2011-05-07 19:39:24 +04:00
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v9fs_co_run_in_worker(
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{
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2011-10-25 10:40:40 +04:00
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err = s->ops->closedir(&s->ctx, fs);
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2011-05-07 19:39:24 +04:00
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if (err < 0) {
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err = -errno;
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}
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});
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2011-05-18 15:38:34 +04:00
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if (!err) {
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total_open_fd--;
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}
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2011-05-07 19:39:24 +04:00
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return err;
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}
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