*/
#include "fsdev/qemu-fsdev.h"
-#include "qemu-thread.h"
-#include "qemu-coroutine.h"
+#include "qemu/thread.h"
+#include "block/coroutine.h"
#include "virtio-9p-coth.h"
-int v9fs_co_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf)
+int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t st_mode,
+ V9fsStatDotl *v9stat)
+{
+ int err = 0;
+ V9fsState *s = pdu->s;
+
+ if (v9fs_request_cancelled(pdu)) {
+ return -EINTR;
+ }
+ if (s->ctx.exops.get_st_gen) {
+ v9fs_path_read_lock(s);
+ v9fs_co_run_in_worker(
+ {
+ err = s->ctx.exops.get_st_gen(&s->ctx, path, st_mode,
+ &v9stat->st_gen);
+ if (err < 0) {
+ err = -errno;
+ }
+ });
+ v9fs_path_unlock(s);
+ }
+ /* The ioctl may not be supported depending on the path */
+ if (err == -ENOTTY) {
+ err = 0;
+ }
+ return err;
+}
+
+int v9fs_co_lstat(V9fsPDU *pdu, V9fsPath *path, struct stat *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->lstat(&s->ctx, path->data, stbuf);
+ err = s->ops->lstat(&s->ctx, path, stbuf);
if (err < 0) {
err = -errno;
}
});
+ v9fs_path_unlock(s);
return err;
}
-int v9fs_co_fstat(V9fsState *s, int fd, struct stat *stbuf)
+int v9fs_co_fstat(V9fsPDU *pdu, V9fsFidState *fidp, struct stat *stbuf)
{
int err;
+ V9fsState *s = pdu->s;
+ if (v9fs_request_cancelled(pdu)) {
+ return -EINTR;
+ }
v9fs_co_run_in_worker(
{
- err = s->ops->fstat(&s->ctx, fd, stbuf);
+ err = s->ops->fstat(&s->ctx, fidp->fid_type, &fidp->fs, stbuf);
if (err < 0) {
err = -errno;
}
});
+ /*
+ * Some FS driver (local:mapped-file) can't support fetching attributes
+ * using file descriptor. Use Path name in that case.
+ */
+ if (err == -EOPNOTSUPP) {
+ err = v9fs_co_lstat(pdu, &fidp->path, stbuf);
+ if (err == -ENOENT) {
+ /*
+ * fstat on an unlinked file. Work with partial results
+ * returned from s->ops->fstat
+ */
+ err = 0;
+ }
+ }
return err;
}
-int v9fs_co_open(V9fsState *s, V9fsFidState *fidp, int flags)
+int v9fs_co_open(V9fsPDU *pdu, V9fsFidState *fidp, 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(
{
- fidp->fs.fd = s->ops->open(&s->ctx, fidp->path.data, flags);
- if (fidp->fs.fd == -1) {
+ err = s->ops->open(&s->ctx, &fidp->path, flags, &fidp->fs);
+ if (err == -1) {
err = -errno;
} else {
err = 0;
}
});
+ v9fs_path_unlock(s);
if (!err) {
total_open_fd++;
if (total_open_fd > open_fd_hw) {
- v9fs_reclaim_fd(s);
+ v9fs_reclaim_fd(pdu);
}
}
return err;
}
-int v9fs_co_open2(V9fsState *s, V9fsFidState *fidp, char *fullname, gid_t gid,
- int flags, int mode)
+int v9fs_co_open2(V9fsPDU *pdu, V9fsFidState *fidp, V9fsString *name, gid_t gid,
+ int flags, int mode, 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 & 07777;
cred.fc_uid = fidp->uid;
cred.fc_gid = gid;
+ /*
+ * Hold the directory fid lock so that directory path name
+ * don't change. Read lock is fine because this fid cannot
+ * be used by any other operation.
+ */
+ v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
- fidp->fs.fd = s->ops->open2(&s->ctx, fullname, flags, &cred);
- err = 0;
- if (fidp->fs.fd == -1) {
+ err = s->ops->open2(&s->ctx, &fidp->path,
+ name->data, flags, &cred, &fidp->fs);
+ 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;
+ s->ops->close(&s->ctx, &fidp->fs);
+ } else {
+ v9fs_path_copy(&fidp->path, &path);
+ }
+ } else {
+ s->ops->close(&s->ctx, &fidp->fs);
+ }
+ v9fs_path_free(&path);
}
});
+ v9fs_path_unlock(s);
if (!err) {
total_open_fd++;
if (total_open_fd > open_fd_hw) {
- v9fs_reclaim_fd(s);
+ v9fs_reclaim_fd(pdu);
}
}
return err;
}
-int v9fs_co_close(V9fsState *s, int fd)
+int v9fs_co_close(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->close(&s->ctx, fd);
+ err = s->ops->close(&s->ctx, fs);
if (err < 0) {
err = -errno;
}
return err;
}
-int v9fs_co_fsync(V9fsState *s, V9fsFidState *fidp, int datasync)
+int v9fs_co_fsync(V9fsPDU *pdu, V9fsFidState *fidp, int datasync)
{
- int fd;
int err;
+ V9fsState *s = pdu->s;
- fd = fidp->fs.fd;
+ if (v9fs_request_cancelled(pdu)) {
+ return -EINTR;
+ }
v9fs_co_run_in_worker(
{
- err = s->ops->fsync(&s->ctx, fd, datasync);
+ err = s->ops->fsync(&s->ctx, fidp->fid_type, &fidp->fs, datasync);
if (err < 0) {
err = -errno;
}
return err;
}
-int v9fs_co_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
+int v9fs_co_link(V9fsPDU *pdu, V9fsFidState *oldfid,
+ V9fsFidState *newdirfid, V9fsString *name)
{
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->link(&s->ctx, oldpath->data, newpath->data);
+ err = s->ops->link(&s->ctx, &oldfid->path,
+ &newdirfid->path, name->data);
if (err < 0) {
err = -errno;
}
});
+ v9fs_path_unlock(s);
return err;
}
-int v9fs_co_pwritev(V9fsState *s, V9fsFidState *fidp,
+int v9fs_co_pwritev(V9fsPDU *pdu, V9fsFidState *fidp,
struct iovec *iov, int iovcnt, int64_t offset)
{
- int fd;
int err;
+ V9fsState *s = pdu->s;
- fd = fidp->fs.fd;
+ if (v9fs_request_cancelled(pdu)) {
+ return -EINTR;
+ }
v9fs_co_run_in_worker(
{
- err = s->ops->pwritev(&s->ctx, fd, iov, iovcnt, offset);
+ err = s->ops->pwritev(&s->ctx, &fidp->fs, iov, iovcnt, offset);
if (err < 0) {
err = -errno;
}
return err;
}
-int v9fs_co_preadv(V9fsState *s, V9fsFidState *fidp,
+int v9fs_co_preadv(V9fsPDU *pdu, V9fsFidState *fidp,
struct iovec *iov, int iovcnt, int64_t offset)
{
- int fd;
int err;
+ V9fsState *s = pdu->s;
- fd = fidp->fs.fd;
+ if (v9fs_request_cancelled(pdu)) {
+ return -EINTR;
+ }
v9fs_co_run_in_worker(
{
- err = s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset);
+ err = s->ops->preadv(&s->ctx, &fidp->fs, iov, iovcnt, offset);
if (err < 0) {
err = -errno;
}
projects / qemu.git / blobdiff