diff options
Diffstat (limited to 'qemu/hw/9pfs/cofs.c')
| -rw-r--r-- | qemu/hw/9pfs/cofs.c | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/qemu/hw/9pfs/cofs.c b/qemu/hw/9pfs/cofs.c deleted file mode 100644 index 18c81cb3d..000000000 --- a/qemu/hw/9pfs/cofs.c +++ /dev/null @@ -1,365 +0,0 @@ - -/* - * 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 "qemu/osdep.h" -#include "fsdev/qemu-fsdev.h" -#include "qemu/thread.h" -#include "qemu/coroutine.h" -#include "coth.h" - -static ssize_t __readlink(V9fsState *s, V9fsPath *path, V9fsString *buf) -{ - ssize_t len, maxlen = PATH_MAX; - - buf->data = g_malloc(PATH_MAX); - for(;;) { - len = s->ops->readlink(&s->ctx, path, buf->data, maxlen); - if (len < 0) { - g_free(buf->data); - buf->data = NULL; - buf->size = 0; - break; - } else if (len == maxlen) { - /* - * We dodn't have space to put the NULL or we have more - * to read. Increase the size and try again - */ - maxlen *= 2; - g_free(buf->data); - buf->data = g_malloc(maxlen); - continue; - } - /* - * Null terminate the readlink output - */ - buf->data[len] = '\0'; - buf->size = len; - break; - } - return len; -} - -int v9fs_co_readlink(V9fsPDU *pdu, V9fsPath *path, V9fsString *buf) -{ - int err; - V9fsState *s = pdu->s; - - if (v9fs_request_cancelled(pdu)) { - return -EINTR; - } - v9fs_path_read_lock(s); - v9fs_co_run_in_worker( - { - err = __readlink(s, path, buf); - if (err < 0) { - err = -errno; - } - }); - v9fs_path_unlock(s); - return err; -} - -int v9fs_co_statfs(V9fsPDU *pdu, V9fsPath *path, struct statfs *stbuf) -{ - 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->statfs(&s->ctx, path, stbuf); - if (err < 0) { - err = -errno; - } - }); - v9fs_path_unlock(s); - return err; -} - -int v9fs_co_chmod(V9fsPDU *pdu, V9fsPath *path, mode_t mode) -{ - int err; - FsCred cred; - V9fsState *s = pdu->s; - - if (v9fs_request_cancelled(pdu)) { - return -EINTR; - } - cred_init(&cred); - cred.fc_mode = mode; - v9fs_path_read_lock(s); - v9fs_co_run_in_worker( - { - err = s->ops->chmod(&s->ctx, path, &cred); - if (err < 0) { - err = -errno; - } - }); - v9fs_path_unlock(s); - return err; -} - -int v9fs_co_utimensat(V9fsPDU *pdu, V9fsPath *path, - struct timespec times[2]) -{ - 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->utimensat(&s->ctx, path, times); - if (err < 0) { - err = -errno; - } - }); - v9fs_path_unlock(s); - return err; -} - -int v9fs_co_chown(V9fsPDU *pdu, V9fsPath *path, uid_t uid, gid_t gid) -{ - int err; - FsCred cred; - V9fsState *s = pdu->s; - - if (v9fs_request_cancelled(pdu)) { - return -EINTR; - } - cred_init(&cred); - cred.fc_uid = uid; - cred.fc_gid = gid; - v9fs_path_read_lock(s); - v9fs_co_run_in_worker( - { - err = s->ops->chown(&s->ctx, path, &cred); - if (err < 0) { - err = -errno; - } - }); - v9fs_path_unlock(s); - return err; -} - -int v9fs_co_truncate(V9fsPDU *pdu, V9fsPath *path, off_t size) -{ - 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->truncate(&s->ctx, path, size); - if (err < 0) { - err = -errno; - } - }); - v9fs_path_unlock(s); - return err; -} - -int v9fs_co_mknod(V9fsPDU *pdu, V9fsFidState *fidp, V9fsString *name, uid_t uid, - gid_t gid, dev_t dev, mode_t mode, struct stat *stbuf) -{ - int err; - V9fsPath path; - FsCred cred; - V9fsState *s = pdu->s; - - if (v9fs_request_cancelled(pdu)) { - return -EINTR; - } - cred_init(&cred); - cred.fc_uid = uid; - cred.fc_gid = gid; - cred.fc_mode = mode; - cred.fc_rdev = dev; - v9fs_path_read_lock(s); - v9fs_co_run_in_worker( - { - err = s->ops->mknod(&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; -} - -/* Only works with path name based fid */ -int v9fs_co_remove(V9fsPDU *pdu, V9fsPath *path) -{ - 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->remove(&s->ctx, path->data); - if (err < 0) { - err = -errno; - } - }); - v9fs_path_unlock(s); - return err; -} - -int v9fs_co_unlinkat(V9fsPDU *pdu, V9fsPath *path, V9fsString *name, int flags) -{ - 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->unlinkat(&s->ctx, path, name->data, flags); - if (err < 0) { - err = -errno; - } - }); - v9fs_path_unlock(s); - return err; -} - -/* Only work with path name based fid */ -int v9fs_co_rename(V9fsPDU *pdu, V9fsPath *oldpath, V9fsPath *newpath) -{ - int err; - V9fsState *s = pdu->s; - - if (v9fs_request_cancelled(pdu)) { - return -EINTR; - } - v9fs_co_run_in_worker( - { - err = s->ops->rename(&s->ctx, oldpath->data, newpath->data); - if (err < 0) { - err = -errno; - } - }); - return err; -} - -int v9fs_co_renameat(V9fsPDU *pdu, V9fsPath *olddirpath, V9fsString *oldname, - V9fsPath *newdirpath, V9fsString *newname) -{ - int err; - V9fsState *s = pdu->s; - - if (v9fs_request_cancelled(pdu)) { - return -EINTR; - } - v9fs_co_run_in_worker( - { - err = s->ops->renameat(&s->ctx, olddirpath, oldname->data, - newdirpath, newname->data); - if (err < 0) { - err = -errno; - } - }); - return err; -} - -int v9fs_co_symlink(V9fsPDU *pdu, V9fsFidState *dfidp, V9fsString *name, - const char *oldpath, 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_uid = dfidp->uid; - cred.fc_gid = gid; - cred.fc_mode = 0777; - v9fs_path_read_lock(s); - v9fs_co_run_in_worker( - { - err = s->ops->symlink(&s->ctx, oldpath, &dfidp->path, - name->data, &cred); - if (err < 0) { - err = -errno; - } else { - v9fs_path_init(&path); - err = v9fs_name_to_path(s, &dfidp->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; -} - -/* - * For path name based fid we don't block. So we can - * directly call the fs driver ops. - */ -int v9fs_co_name_to_path(V9fsPDU *pdu, V9fsPath *dirpath, - const char *name, V9fsPath *path) -{ - int err; - V9fsState *s = pdu->s; - - if (s->ctx.export_flags & V9FS_PATHNAME_FSCONTEXT) { - err = s->ops->name_to_path(&s->ctx, dirpath, name, path); - if (err < 0) { - err = -errno; - } - } else { - if (v9fs_request_cancelled(pdu)) { - return -EINTR; - } - v9fs_co_run_in_worker( - { - err = s->ops->name_to_path(&s->ctx, dirpath, name, path); - if (err < 0) { - err = -errno; - } - }); - } - return err; -} |