/* * 9p backend * * Copyright IBM, Corp. 2011 * * Authors: * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. * */ #include "qemu/osdep.h" #include "fsdev/qemu-fsdev.h" #include "qemu/thread.h" #include "qemu/coroutine.h" #include "coth.h" int coroutine_fn v9fs_co_readdir(V9fsPDU *pdu, V9fsFidState *fidp, struct dirent **dent) { int err; V9fsState *s = pdu->s; if (v9fs_request_cancelled(pdu)) { return -EINTR; } v9fs_co_run_in_worker( { struct dirent *entry; errno = 0; entry = s->ops->readdir(&s->ctx, &fidp->fs); if (!entry && errno) { err = -errno; } else { *dent = entry; err = 0; } }); return err; } off_t v9fs_co_telldir(V9fsPDU *pdu, V9fsFidState *fidp) { off_t err; V9fsState *s = pdu->s; if (v9fs_request_cancelled(pdu)) { return -EINTR; } v9fs_co_run_in_worker( { err = s->ops->telldir(&s->ctx, &fidp->fs); if (err < 0) { err = -errno; } }); return err; } void coroutine_fn v9fs_co_seekdir(V9fsPDU *pdu, V9fsFidState *fidp, off_t offset) { V9fsState *s = pdu->s; if (v9fs_request_cancelled(pdu)) { return; } v9fs_co_run_in_worker( { s->ops->seekdir(&s->ctx, &fidp->fs, offset); }); } void coroutine_fn v9fs_co_rewinddir(V9fsPDU *pdu, V9fsFidState *fidp) { V9fsState *s = pdu->s; if (v9fs_request_cancelled(pdu)) { return; } v9fs_co_run_in_worker( { s->ops->rewinddir(&s->ctx, &fidp->fs); }); } int coroutine_fn v9fs_co_mkdir(V9fsPDU *pdu, V9fsFidState *fidp, V9fsString *name, mode_t mode, uid_t uid, gid_t gid, struct stat *stbuf) { int err; FsCred cred; V9fsPath path; V9fsState *s = pdu->s; if (v9fs_request_cancelled(pdu)) { return -EINTR; } cred_init(&cred); cred.fc_mode = mode; cred.fc_uid = uid; cred.fc_gid = gid; v9fs_path_read_lock(s); v9fs_co_run_in_worker( { err = s->ops->mkdir(&s->ctx, &fidp->path, name->data, &cred); if (err < 0) { err = -errno; } else { v9fs_path_init(&path); err = v9fs_name_to_path(s, &fidp->path, name->data, &path); if (!err) { err = s->ops->lstat(&s->ctx, &path, stbuf); if (err < 0) { err = -errno; } } v9fs_path_free(&path); } }); v9fs_path_unlock(s); return err; } int coroutine_fn v9fs_co_opendir(V9fsPDU *pdu, V9fsFidState *fidp) { int err; V9fsState *s = pdu->s; if (v9fs_request_cancelled(pdu)) { return -EINTR; } v9fs_path_read_lock(s); v9fs_co_run_in_worker( { err = s->ops->opendir(&s->ctx, &fidp->path, &fidp->fs); if (err < 0) { err = -errno; } else { err = 0; } }); v9fs_path_unlock(s); if (!err) { total_open_fd++; if (total_open_fd > open_fd_hw) { v9fs_reclaim_fd(pdu); } } return err; } int coroutine_fn v9fs_co_closedir(V9fsPDU *pdu, V9fsFidOpenState *fs) { int err; V9fsState *s = pdu->s; if (v9fs_request_cancelled(pdu)) { return -EINTR; } v9fs_co_run_in_worker( { err = s->ops->closedir(&s->ctx, fs); if (err < 0) { err = -errno; } }); if (!err) { total_open_fd--; } return err; }