diff options
Diffstat (limited to 'qemu/hw/9pfs/codir.c')
| -rw-r--r-- | qemu/hw/9pfs/codir.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/qemu/hw/9pfs/codir.c b/qemu/hw/9pfs/codir.c new file mode 100644 index 000000000..65ad3298b --- /dev/null +++ b/qemu/hw/9pfs/codir.c @@ -0,0 +1,168 @@ + +/* + * Virtio 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 "fsdev/qemu-fsdev.h" +#include "qemu/thread.h" +#include "block/coroutine.h" +#include "virtio-9p-coth.h" + +int v9fs_co_readdir_r(V9fsPDU *pdu, V9fsFidState *fidp, struct dirent *dent, + struct dirent **result) +{ + int err; + V9fsState *s = pdu->s; + + if (v9fs_request_cancelled(pdu)) { + return -EINTR; + } + v9fs_co_run_in_worker( + { + errno = 0; + err = s->ops->readdir_r(&s->ctx, &fidp->fs, dent, result); + if (!*result && errno) { + err = -errno; + } else { + 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 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 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 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 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 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; +} |