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/*
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* Virtio 9p backend
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Anthony Liguori <aliguori@us.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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#include "virtio.h" |
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#include "pc.h" |
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#include "qemu_socket.h" |
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#include "virtio-9p.h" |
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#include "fsdev/qemu-fsdev.h" |
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#include "virtio-9p-debug.h" |
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int dotu = 1; |
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int debug_9p_pdu;
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enum {
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Oread = 0x00,
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Owrite = 0x01,
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Ordwr = 0x02,
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Oexec = 0x03,
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Oexcl = 0x04,
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Otrunc = 0x10,
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Orexec = 0x20,
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Orclose = 0x40,
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Oappend = 0x80,
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}; |
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static int omode_to_uflags(int8_t mode) |
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{ |
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int ret = 0; |
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switch (mode & 3) { |
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case Oread:
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ret = O_RDONLY; |
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break;
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case Ordwr:
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ret = O_RDWR; |
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break;
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case Owrite:
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ret = O_WRONLY; |
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break;
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case Oexec:
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ret = O_RDONLY; |
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break;
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} |
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if (mode & Otrunc) {
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ret |= O_TRUNC; |
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} |
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if (mode & Oappend) {
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ret |= O_APPEND; |
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} |
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if (mode & Oexcl) {
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ret |= O_EXCL; |
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} |
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return ret;
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} |
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void cred_init(FsCred *credp)
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{ |
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credp->fc_uid = -1;
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credp->fc_gid = -1;
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credp->fc_mode = -1;
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credp->fc_rdev = -1;
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} |
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static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
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{ |
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return s->ops->lstat(&s->ctx, path->data, stbuf);
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} |
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static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
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{ |
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ssize_t len; |
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buf->data = qemu_malloc(1024);
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len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1); |
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if (len > -1) { |
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buf->size = len; |
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buf->data[len] = 0;
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} |
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return len;
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} |
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static int v9fs_do_close(V9fsState *s, int fd) |
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{ |
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return s->ops->close(&s->ctx, fd);
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} |
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static int v9fs_do_closedir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->closedir(&s->ctx, dir);
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} |
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static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
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{ |
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return s->ops->open(&s->ctx, path->data, flags);
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} |
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static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path)
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{ |
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return s->ops->opendir(&s->ctx, path->data);
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} |
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static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->rewinddir(&s->ctx, dir);
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} |
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static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
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{ |
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return s->ops->telldir(&s->ctx, dir);
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} |
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static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->readdir(&s->ctx, dir);
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} |
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static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
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{ |
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return s->ops->seekdir(&s->ctx, dir, off);
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} |
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static int v9fs_do_readv(V9fsState *s, int fd, const struct iovec *iov, |
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int iovcnt)
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{ |
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return s->ops->readv(&s->ctx, fd, iov, iovcnt);
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} |
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static off_t v9fs_do_lseek(V9fsState *s, int fd, off_t offset, int whence) |
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{ |
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return s->ops->lseek(&s->ctx, fd, offset, whence);
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} |
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static int v9fs_do_writev(V9fsState *s, int fd, const struct iovec *iov, |
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int iovcnt)
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{ |
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return s->ops->writev(&s->ctx, fd, iov, iovcnt);
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} |
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static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_mode = mode; |
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return s->ops->chmod(&s->ctx, path->data, &cred);
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} |
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static int v9fs_do_mknod(V9fsState *s, V9fsCreateState *vs, mode_t mode, |
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dev_t dev) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = vs->fidp->uid; |
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cred.fc_mode = mode; |
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cred.fc_rdev = dev; |
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return s->ops->mknod(&s->ctx, vs->fullname.data, &cred);
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} |
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static int v9fs_do_mksock(V9fsState *s, V9fsString *path) |
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{ |
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return s->ops->mksock(&s->ctx, path->data);
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} |
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static int v9fs_do_mkdir(V9fsState *s, V9fsCreateState *vs) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = vs->fidp->uid; |
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cred.fc_mode = vs->perm & 0777;
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return s->ops->mkdir(&s->ctx, vs->fullname.data, &cred);
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} |
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static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) |
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{ |
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return s->ops->fstat(&s->ctx, fd, stbuf);
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} |
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static int v9fs_do_open2(V9fsState *s, V9fsCreateState *vs) |
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{ |
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FsCred cred; |
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int flags;
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cred_init(&cred); |
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cred.fc_uid = vs->fidp->uid; |
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cred.fc_mode = vs->perm & 0777;
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flags = omode_to_uflags(vs->mode) | O_CREAT; |
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return s->ops->open2(&s->ctx, vs->fullname.data, flags, &cred);
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} |
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static int v9fs_do_symlink(V9fsState *s, V9fsCreateState *vs) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = vs->fidp->uid; |
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cred.fc_mode = vs->perm | 0777;
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return s->ops->symlink(&s->ctx, vs->extension.data, vs->fullname.data,
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&cred); |
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} |
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static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) |
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{ |
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return s->ops->link(&s->ctx, oldpath->data, newpath->data);
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} |
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static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
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{ |
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return s->ops->truncate(&s->ctx, path->data, size);
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} |
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static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, |
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V9fsString *newpath) |
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{ |
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return s->ops->rename(&s->ctx, oldpath->data, newpath->data);
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} |
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static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = uid; |
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cred.fc_gid = gid; |
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return s->ops->chown(&s->ctx, path->data, &cred);
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} |
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static int v9fs_do_utime(V9fsState *s, V9fsString *path, |
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const struct utimbuf *buf) |
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{ |
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return s->ops->utime(&s->ctx, path->data, buf);
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} |
250 |
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static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
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{ |
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return s->ops->remove(&s->ctx, path->data);
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} |
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static int v9fs_do_fsync(V9fsState *s, int fd) |
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{ |
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return s->ops->fsync(&s->ctx, fd);
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} |
260 |
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static void v9fs_string_init(V9fsString *str) |
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{ |
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str->data = NULL;
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str->size = 0;
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} |
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static void v9fs_string_free(V9fsString *str) |
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{ |
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qemu_free(str->data); |
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str->data = NULL;
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str->size = 0;
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} |
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static void v9fs_string_null(V9fsString *str) |
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{ |
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v9fs_string_free(str); |
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} |
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static int number_to_string(void *arg, char type) |
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{ |
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unsigned int ret = 0; |
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switch (type) {
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case 'u': { |
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unsigned int num = *(unsigned int *)arg; |
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do {
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ret++; |
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num = num/10;
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} while (num);
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break;
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} |
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default:
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printf("Number_to_string: Unknown number format\n");
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return -1; |
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} |
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return ret;
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} |
300 |
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static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) |
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{ |
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va_list ap2; |
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char *iter = (char *)fmt; |
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int len = 0; |
306 |
int nr_args = 0; |
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char *arg_char_ptr;
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unsigned int arg_uint; |
309 |
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/* Find the number of %'s that denotes an argument */
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for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
312 |
nr_args++; |
313 |
iter++; |
314 |
} |
315 |
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len = strlen(fmt) - 2*nr_args;
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317 |
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318 |
if (!nr_args) {
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goto alloc_print;
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320 |
} |
321 |
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322 |
va_copy(ap2, ap); |
323 |
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iter = (char *)fmt;
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325 |
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/* Now parse the format string */
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327 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
328 |
iter++; |
329 |
switch (*iter) {
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330 |
case 'u': |
331 |
arg_uint = va_arg(ap2, unsigned int); |
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len += number_to_string((void *)&arg_uint, 'u'); |
333 |
break;
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case 's': |
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arg_char_ptr = va_arg(ap2, char *);
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len += strlen(arg_char_ptr); |
337 |
break;
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338 |
case 'c': |
339 |
len += 1;
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break;
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341 |
default:
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342 |
fprintf(stderr, |
343 |
"v9fs_string_alloc_printf:Incorrect format %c", *iter);
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344 |
return -1; |
345 |
} |
346 |
iter++; |
347 |
} |
348 |
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349 |
alloc_print:
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350 |
*strp = qemu_malloc((len + 1) * sizeof(**strp)); |
351 |
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352 |
return vsprintf(*strp, fmt, ap);
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} |
354 |
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355 |
static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
356 |
{ |
357 |
va_list ap; |
358 |
int err;
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359 |
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360 |
v9fs_string_free(str); |
361 |
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362 |
va_start(ap, fmt); |
363 |
err = v9fs_string_alloc_printf(&str->data, fmt, ap); |
364 |
BUG_ON(err == -1);
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365 |
va_end(ap); |
366 |
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367 |
str->size = err; |
368 |
} |
369 |
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370 |
static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
371 |
{ |
372 |
v9fs_string_free(lhs); |
373 |
v9fs_string_sprintf(lhs, "%s", rhs->data);
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374 |
} |
375 |
|
376 |
static size_t v9fs_string_size(V9fsString *str)
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377 |
{ |
378 |
return str->size;
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379 |
} |
380 |
|
381 |
static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
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382 |
{ |
383 |
V9fsFidState *f; |
384 |
|
385 |
for (f = s->fid_list; f; f = f->next) {
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386 |
if (f->fid == fid) {
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387 |
return f;
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388 |
} |
389 |
} |
390 |
|
391 |
return NULL; |
392 |
} |
393 |
|
394 |
static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
395 |
{ |
396 |
V9fsFidState *f; |
397 |
|
398 |
f = lookup_fid(s, fid); |
399 |
if (f) {
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400 |
return NULL; |
401 |
} |
402 |
|
403 |
f = qemu_mallocz(sizeof(V9fsFidState));
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404 |
|
405 |
f->fid = fid; |
406 |
f->fd = -1;
|
407 |
f->dir = NULL;
|
408 |
|
409 |
f->next = s->fid_list; |
410 |
s->fid_list = f; |
411 |
|
412 |
return f;
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413 |
} |
414 |
|
415 |
static int free_fid(V9fsState *s, int32_t fid) |
416 |
{ |
417 |
V9fsFidState **fidpp, *fidp; |
418 |
|
419 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
420 |
if ((*fidpp)->fid == fid) {
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421 |
break;
|
422 |
} |
423 |
} |
424 |
|
425 |
if (*fidpp == NULL) { |
426 |
return -ENOENT;
|
427 |
} |
428 |
|
429 |
fidp = *fidpp; |
430 |
*fidpp = fidp->next; |
431 |
|
432 |
if (fidp->fd != -1) { |
433 |
v9fs_do_close(s, fidp->fd); |
434 |
} |
435 |
if (fidp->dir) {
|
436 |
v9fs_do_closedir(s, fidp->dir); |
437 |
} |
438 |
v9fs_string_free(&fidp->path); |
439 |
qemu_free(fidp); |
440 |
|
441 |
return 0; |
442 |
} |
443 |
|
444 |
#define P9_QID_TYPE_DIR 0x80 |
445 |
#define P9_QID_TYPE_SYMLINK 0x02 |
446 |
|
447 |
#define P9_STAT_MODE_DIR 0x80000000 |
448 |
#define P9_STAT_MODE_APPEND 0x40000000 |
449 |
#define P9_STAT_MODE_EXCL 0x20000000 |
450 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
451 |
#define P9_STAT_MODE_AUTH 0x08000000 |
452 |
#define P9_STAT_MODE_TMP 0x04000000 |
453 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
454 |
#define P9_STAT_MODE_LINK 0x01000000 |
455 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
456 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
457 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
458 |
#define P9_STAT_MODE_SETUID 0x00080000 |
459 |
#define P9_STAT_MODE_SETGID 0x00040000 |
460 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
461 |
|
462 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
463 |
P9_STAT_MODE_SYMLINK | \ |
464 |
P9_STAT_MODE_LINK | \ |
465 |
P9_STAT_MODE_DEVICE | \ |
466 |
P9_STAT_MODE_NAMED_PIPE | \ |
467 |
P9_STAT_MODE_SOCKET) |
468 |
|
469 |
/* This is the algorithm from ufs in spfs */
|
470 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
471 |
{ |
472 |
size_t size; |
473 |
|
474 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
475 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
476 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
477 |
qidp->type = 0;
|
478 |
if (S_ISDIR(stbuf->st_mode)) {
|
479 |
qidp->type |= P9_QID_TYPE_DIR; |
480 |
} |
481 |
if (S_ISLNK(stbuf->st_mode)) {
|
482 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
483 |
} |
484 |
} |
485 |
|
486 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
487 |
{ |
488 |
struct stat stbuf;
|
489 |
int err;
|
490 |
|
491 |
err = v9fs_do_lstat(s, &fidp->path, &stbuf); |
492 |
if (err) {
|
493 |
return err;
|
494 |
} |
495 |
|
496 |
stat_to_qid(&stbuf, qidp); |
497 |
return 0; |
498 |
} |
499 |
|
500 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
501 |
{ |
502 |
V9fsPDU *pdu = NULL;
|
503 |
|
504 |
if (!QLIST_EMPTY(&s->free_list)) {
|
505 |
pdu = QLIST_FIRST(&s->free_list); |
506 |
QLIST_REMOVE(pdu, next); |
507 |
} |
508 |
return pdu;
|
509 |
} |
510 |
|
511 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
512 |
{ |
513 |
if (pdu) {
|
514 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
515 |
} |
516 |
} |
517 |
|
518 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
519 |
size_t offset, size_t size, int pack)
|
520 |
{ |
521 |
int i = 0; |
522 |
size_t copied = 0;
|
523 |
|
524 |
for (i = 0; size && i < sg_count; i++) { |
525 |
size_t len; |
526 |
if (offset >= sg[i].iov_len) {
|
527 |
/* skip this sg */
|
528 |
offset -= sg[i].iov_len; |
529 |
continue;
|
530 |
} else {
|
531 |
len = MIN(sg[i].iov_len - offset, size); |
532 |
if (pack) {
|
533 |
memcpy(sg[i].iov_base + offset, addr, len); |
534 |
} else {
|
535 |
memcpy(addr, sg[i].iov_base + offset, len); |
536 |
} |
537 |
size -= len; |
538 |
copied += len; |
539 |
addr += len; |
540 |
if (size) {
|
541 |
offset = 0;
|
542 |
continue;
|
543 |
} |
544 |
} |
545 |
} |
546 |
|
547 |
return copied;
|
548 |
} |
549 |
|
550 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
551 |
{ |
552 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
553 |
offset, size, 0);
|
554 |
} |
555 |
|
556 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
557 |
size_t size) |
558 |
{ |
559 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
560 |
offset, size, 1);
|
561 |
} |
562 |
|
563 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
564 |
{ |
565 |
size_t pos = 0;
|
566 |
int i, j;
|
567 |
struct iovec *src_sg;
|
568 |
unsigned int num; |
569 |
|
570 |
if (rx) {
|
571 |
src_sg = pdu->elem.in_sg; |
572 |
num = pdu->elem.in_num; |
573 |
} else {
|
574 |
src_sg = pdu->elem.out_sg; |
575 |
num = pdu->elem.out_num; |
576 |
} |
577 |
|
578 |
j = 0;
|
579 |
for (i = 0; i < num; i++) { |
580 |
if (offset <= pos) {
|
581 |
sg[j].iov_base = src_sg[i].iov_base; |
582 |
sg[j].iov_len = src_sg[i].iov_len; |
583 |
j++; |
584 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
585 |
sg[j].iov_base = src_sg[i].iov_base; |
586 |
sg[j].iov_len = src_sg[i].iov_len; |
587 |
sg[j].iov_base += (offset - pos); |
588 |
sg[j].iov_len -= (offset - pos); |
589 |
j++; |
590 |
} |
591 |
pos += src_sg[i].iov_len; |
592 |
} |
593 |
|
594 |
return j;
|
595 |
} |
596 |
|
597 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
598 |
{ |
599 |
size_t old_offset = offset; |
600 |
va_list ap; |
601 |
int i;
|
602 |
|
603 |
va_start(ap, fmt); |
604 |
for (i = 0; fmt[i]; i++) { |
605 |
switch (fmt[i]) {
|
606 |
case 'b': { |
607 |
uint8_t *valp = va_arg(ap, uint8_t *); |
608 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
609 |
break;
|
610 |
} |
611 |
case 'w': { |
612 |
uint16_t val, *valp; |
613 |
valp = va_arg(ap, uint16_t *); |
614 |
val = le16_to_cpupu(valp); |
615 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
616 |
*valp = val; |
617 |
break;
|
618 |
} |
619 |
case 'd': { |
620 |
uint32_t val, *valp; |
621 |
valp = va_arg(ap, uint32_t *); |
622 |
val = le32_to_cpupu(valp); |
623 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
624 |
*valp = val; |
625 |
break;
|
626 |
} |
627 |
case 'q': { |
628 |
uint64_t val, *valp; |
629 |
valp = va_arg(ap, uint64_t *); |
630 |
val = le64_to_cpup(valp); |
631 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
632 |
*valp = val; |
633 |
break;
|
634 |
} |
635 |
case 'v': { |
636 |
struct iovec *iov = va_arg(ap, struct iovec *); |
637 |
int *iovcnt = va_arg(ap, int *); |
638 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
639 |
break;
|
640 |
} |
641 |
case 's': { |
642 |
V9fsString *str = va_arg(ap, V9fsString *); |
643 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
644 |
/* FIXME: sanity check str->size */
|
645 |
str->data = qemu_malloc(str->size + 1);
|
646 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
647 |
str->data[str->size] = 0;
|
648 |
break;
|
649 |
} |
650 |
case 'Q': { |
651 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
652 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
653 |
&qidp->type, &qidp->version, &qidp->path); |
654 |
break;
|
655 |
} |
656 |
case 'S': { |
657 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
658 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
659 |
&statp->size, &statp->type, &statp->dev, |
660 |
&statp->qid, &statp->mode, &statp->atime, |
661 |
&statp->mtime, &statp->length, |
662 |
&statp->name, &statp->uid, &statp->gid, |
663 |
&statp->muid, &statp->extension, |
664 |
&statp->n_uid, &statp->n_gid, |
665 |
&statp->n_muid); |
666 |
break;
|
667 |
} |
668 |
default:
|
669 |
break;
|
670 |
} |
671 |
} |
672 |
|
673 |
va_end(ap); |
674 |
|
675 |
return offset - old_offset;
|
676 |
} |
677 |
|
678 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
679 |
{ |
680 |
size_t old_offset = offset; |
681 |
va_list ap; |
682 |
int i;
|
683 |
|
684 |
va_start(ap, fmt); |
685 |
for (i = 0; fmt[i]; i++) { |
686 |
switch (fmt[i]) {
|
687 |
case 'b': { |
688 |
uint8_t val = va_arg(ap, int);
|
689 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
690 |
break;
|
691 |
} |
692 |
case 'w': { |
693 |
uint16_t val; |
694 |
cpu_to_le16w(&val, va_arg(ap, int));
|
695 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
696 |
break;
|
697 |
} |
698 |
case 'd': { |
699 |
uint32_t val; |
700 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
701 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
702 |
break;
|
703 |
} |
704 |
case 'q': { |
705 |
uint64_t val; |
706 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
707 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
708 |
break;
|
709 |
} |
710 |
case 'v': { |
711 |
struct iovec *iov = va_arg(ap, struct iovec *); |
712 |
int *iovcnt = va_arg(ap, int *); |
713 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
714 |
break;
|
715 |
} |
716 |
case 's': { |
717 |
V9fsString *str = va_arg(ap, V9fsString *); |
718 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
719 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
720 |
break;
|
721 |
} |
722 |
case 'Q': { |
723 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
724 |
offset += pdu_marshal(pdu, offset, "bdq",
|
725 |
qidp->type, qidp->version, qidp->path); |
726 |
break;
|
727 |
} |
728 |
case 'S': { |
729 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
730 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
731 |
statp->size, statp->type, statp->dev, |
732 |
&statp->qid, statp->mode, statp->atime, |
733 |
statp->mtime, statp->length, &statp->name, |
734 |
&statp->uid, &statp->gid, &statp->muid, |
735 |
&statp->extension, statp->n_uid, |
736 |
statp->n_gid, statp->n_muid); |
737 |
break;
|
738 |
} |
739 |
default:
|
740 |
break;
|
741 |
} |
742 |
} |
743 |
va_end(ap); |
744 |
|
745 |
return offset - old_offset;
|
746 |
} |
747 |
|
748 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
749 |
{ |
750 |
int8_t id = pdu->id + 1; /* Response */ |
751 |
|
752 |
if (len < 0) { |
753 |
V9fsString str; |
754 |
int err = -len;
|
755 |
|
756 |
str.data = strerror(err); |
757 |
str.size = strlen(str.data); |
758 |
|
759 |
len = 7;
|
760 |
len += pdu_marshal(pdu, len, "s", &str);
|
761 |
if (dotu) {
|
762 |
len += pdu_marshal(pdu, len, "d", err);
|
763 |
} |
764 |
|
765 |
id = P9_RERROR; |
766 |
} |
767 |
|
768 |
/* fill out the header */
|
769 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
770 |
|
771 |
/* keep these in sync */
|
772 |
pdu->size = len; |
773 |
pdu->id = id; |
774 |
|
775 |
/* push onto queue and notify */
|
776 |
virtqueue_push(s->vq, &pdu->elem, len); |
777 |
|
778 |
/* FIXME: we should batch these completions */
|
779 |
virtio_notify(&s->vdev, s->vq); |
780 |
|
781 |
free_pdu(s, pdu); |
782 |
} |
783 |
|
784 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
785 |
{ |
786 |
mode_t ret; |
787 |
|
788 |
ret = mode & 0777;
|
789 |
if (mode & P9_STAT_MODE_DIR) {
|
790 |
ret |= S_IFDIR; |
791 |
} |
792 |
|
793 |
if (dotu) {
|
794 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
795 |
ret |= S_IFLNK; |
796 |
} |
797 |
if (mode & P9_STAT_MODE_SOCKET) {
|
798 |
ret |= S_IFSOCK; |
799 |
} |
800 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
801 |
ret |= S_IFIFO; |
802 |
} |
803 |
if (mode & P9_STAT_MODE_DEVICE) {
|
804 |
if (extension && extension->data[0] == 'c') { |
805 |
ret |= S_IFCHR; |
806 |
} else {
|
807 |
ret |= S_IFBLK; |
808 |
} |
809 |
} |
810 |
} |
811 |
|
812 |
if (!(ret&~0777)) { |
813 |
ret |= S_IFREG; |
814 |
} |
815 |
|
816 |
if (mode & P9_STAT_MODE_SETUID) {
|
817 |
ret |= S_ISUID; |
818 |
} |
819 |
if (mode & P9_STAT_MODE_SETGID) {
|
820 |
ret |= S_ISGID; |
821 |
} |
822 |
if (mode & P9_STAT_MODE_SETVTX) {
|
823 |
ret |= S_ISVTX; |
824 |
} |
825 |
|
826 |
return ret;
|
827 |
} |
828 |
|
829 |
static int donttouch_stat(V9fsStat *stat) |
830 |
{ |
831 |
if (stat->type == -1 && |
832 |
stat->dev == -1 &&
|
833 |
stat->qid.type == -1 &&
|
834 |
stat->qid.version == -1 &&
|
835 |
stat->qid.path == -1 &&
|
836 |
stat->mode == -1 &&
|
837 |
stat->atime == -1 &&
|
838 |
stat->mtime == -1 &&
|
839 |
stat->length == -1 &&
|
840 |
!stat->name.size && |
841 |
!stat->uid.size && |
842 |
!stat->gid.size && |
843 |
!stat->muid.size && |
844 |
stat->n_uid == -1 &&
|
845 |
stat->n_gid == -1 &&
|
846 |
stat->n_muid == -1) {
|
847 |
return 1; |
848 |
} |
849 |
|
850 |
return 0; |
851 |
} |
852 |
|
853 |
static void v9fs_stat_free(V9fsStat *stat) |
854 |
{ |
855 |
v9fs_string_free(&stat->name); |
856 |
v9fs_string_free(&stat->uid); |
857 |
v9fs_string_free(&stat->gid); |
858 |
v9fs_string_free(&stat->muid); |
859 |
v9fs_string_free(&stat->extension); |
860 |
} |
861 |
|
862 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
863 |
{ |
864 |
uint32_t mode; |
865 |
|
866 |
mode = stbuf->st_mode & 0777;
|
867 |
if (S_ISDIR(stbuf->st_mode)) {
|
868 |
mode |= P9_STAT_MODE_DIR; |
869 |
} |
870 |
|
871 |
if (dotu) {
|
872 |
if (S_ISLNK(stbuf->st_mode)) {
|
873 |
mode |= P9_STAT_MODE_SYMLINK; |
874 |
} |
875 |
|
876 |
if (S_ISSOCK(stbuf->st_mode)) {
|
877 |
mode |= P9_STAT_MODE_SOCKET; |
878 |
} |
879 |
|
880 |
if (S_ISFIFO(stbuf->st_mode)) {
|
881 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
882 |
} |
883 |
|
884 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
885 |
mode |= P9_STAT_MODE_DEVICE; |
886 |
} |
887 |
|
888 |
if (stbuf->st_mode & S_ISUID) {
|
889 |
mode |= P9_STAT_MODE_SETUID; |
890 |
} |
891 |
|
892 |
if (stbuf->st_mode & S_ISGID) {
|
893 |
mode |= P9_STAT_MODE_SETGID; |
894 |
} |
895 |
|
896 |
if (stbuf->st_mode & S_ISVTX) {
|
897 |
mode |= P9_STAT_MODE_SETVTX; |
898 |
} |
899 |
} |
900 |
|
901 |
return mode;
|
902 |
} |
903 |
|
904 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
905 |
const struct stat *stbuf, |
906 |
V9fsStat *v9stat) |
907 |
{ |
908 |
int err;
|
909 |
const char *str; |
910 |
|
911 |
memset(v9stat, 0, sizeof(*v9stat)); |
912 |
|
913 |
stat_to_qid(stbuf, &v9stat->qid); |
914 |
v9stat->mode = stat_to_v9mode(stbuf); |
915 |
v9stat->atime = stbuf->st_atime; |
916 |
v9stat->mtime = stbuf->st_mtime; |
917 |
v9stat->length = stbuf->st_size; |
918 |
|
919 |
v9fs_string_null(&v9stat->uid); |
920 |
v9fs_string_null(&v9stat->gid); |
921 |
v9fs_string_null(&v9stat->muid); |
922 |
|
923 |
if (dotu) {
|
924 |
v9stat->n_uid = stbuf->st_uid; |
925 |
v9stat->n_gid = stbuf->st_gid; |
926 |
v9stat->n_muid = 0;
|
927 |
|
928 |
v9fs_string_null(&v9stat->extension); |
929 |
|
930 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
931 |
err = v9fs_do_readlink(s, name, &v9stat->extension); |
932 |
if (err == -1) { |
933 |
err = -errno; |
934 |
return err;
|
935 |
} |
936 |
v9stat->extension.data[err] = 0;
|
937 |
v9stat->extension.size = err; |
938 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
939 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
940 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
941 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
942 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
943 |
v9fs_string_sprintf(&v9stat->extension, "%s %u",
|
944 |
"HARDLINKCOUNT", stbuf->st_nlink);
|
945 |
} |
946 |
} |
947 |
|
948 |
str = strrchr(name->data, '/');
|
949 |
if (str) {
|
950 |
str += 1;
|
951 |
} else {
|
952 |
str = name->data; |
953 |
} |
954 |
|
955 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
956 |
|
957 |
v9stat->size = 61 +
|
958 |
v9fs_string_size(&v9stat->name) + |
959 |
v9fs_string_size(&v9stat->uid) + |
960 |
v9fs_string_size(&v9stat->gid) + |
961 |
v9fs_string_size(&v9stat->muid) + |
962 |
v9fs_string_size(&v9stat->extension); |
963 |
return 0; |
964 |
} |
965 |
|
966 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
967 |
{ |
968 |
while (len && *iovcnt) {
|
969 |
if (len < sg->iov_len) {
|
970 |
sg->iov_len -= len; |
971 |
sg->iov_base += len; |
972 |
len = 0;
|
973 |
} else {
|
974 |
len -= sg->iov_len; |
975 |
sg++; |
976 |
*iovcnt -= 1;
|
977 |
} |
978 |
} |
979 |
|
980 |
return sg;
|
981 |
} |
982 |
|
983 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
984 |
{ |
985 |
int i;
|
986 |
int total = 0; |
987 |
|
988 |
for (i = 0; i < *cnt; i++) { |
989 |
if ((total + sg[i].iov_len) > cap) {
|
990 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
991 |
i++; |
992 |
break;
|
993 |
} |
994 |
total += sg[i].iov_len; |
995 |
} |
996 |
|
997 |
*cnt = i; |
998 |
|
999 |
return sg;
|
1000 |
} |
1001 |
|
1002 |
static void print_sg(struct iovec *sg, int cnt) |
1003 |
{ |
1004 |
int i;
|
1005 |
|
1006 |
printf("sg[%d]: {", cnt);
|
1007 |
for (i = 0; i < cnt; i++) { |
1008 |
if (i) {
|
1009 |
printf(", ");
|
1010 |
} |
1011 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
1012 |
} |
1013 |
printf("}\n");
|
1014 |
} |
1015 |
|
1016 |
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1017 |
{ |
1018 |
V9fsString str; |
1019 |
v9fs_string_init(&str); |
1020 |
v9fs_string_copy(&str, dst); |
1021 |
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
1022 |
v9fs_string_free(&str); |
1023 |
} |
1024 |
|
1025 |
static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
1026 |
{ |
1027 |
int32_t msize; |
1028 |
V9fsString version; |
1029 |
size_t offset = 7;
|
1030 |
|
1031 |
pdu_unmarshal(pdu, offset, "ds", &msize, &version);
|
1032 |
|
1033 |
if (strcmp(version.data, "9P2000.u")) { |
1034 |
v9fs_string_sprintf(&version, "unknown");
|
1035 |
} |
1036 |
|
1037 |
offset += pdu_marshal(pdu, offset, "ds", msize, &version);
|
1038 |
complete_pdu(s, pdu, offset); |
1039 |
|
1040 |
v9fs_string_free(&version); |
1041 |
} |
1042 |
|
1043 |
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) |
1044 |
{ |
1045 |
int32_t fid, afid, n_uname; |
1046 |
V9fsString uname, aname; |
1047 |
V9fsFidState *fidp; |
1048 |
V9fsQID qid; |
1049 |
size_t offset = 7;
|
1050 |
ssize_t err; |
1051 |
|
1052 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
1053 |
|
1054 |
fidp = alloc_fid(s, fid); |
1055 |
if (fidp == NULL) { |
1056 |
err = -EINVAL; |
1057 |
goto out;
|
1058 |
} |
1059 |
|
1060 |
fidp->uid = n_uname; |
1061 |
|
1062 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
1063 |
err = fid_to_qid(s, fidp, &qid); |
1064 |
if (err) {
|
1065 |
err = -EINVAL; |
1066 |
free_fid(s, fid); |
1067 |
goto out;
|
1068 |
} |
1069 |
|
1070 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
1071 |
|
1072 |
err = offset; |
1073 |
out:
|
1074 |
complete_pdu(s, pdu, err); |
1075 |
v9fs_string_free(&uname); |
1076 |
v9fs_string_free(&aname); |
1077 |
} |
1078 |
|
1079 |
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1080 |
{ |
1081 |
if (err == -1) { |
1082 |
err = -errno; |
1083 |
goto out;
|
1084 |
} |
1085 |
|
1086 |
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); |
1087 |
if (err) {
|
1088 |
goto out;
|
1089 |
} |
1090 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); |
1091 |
err = vs->offset; |
1092 |
|
1093 |
out:
|
1094 |
complete_pdu(s, vs->pdu, err); |
1095 |
v9fs_stat_free(&vs->v9stat); |
1096 |
qemu_free(vs); |
1097 |
} |
1098 |
|
1099 |
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1100 |
{ |
1101 |
int32_t fid; |
1102 |
V9fsStatState *vs; |
1103 |
ssize_t err = 0;
|
1104 |
|
1105 |
vs = qemu_malloc(sizeof(*vs));
|
1106 |
vs->pdu = pdu; |
1107 |
vs->offset = 7;
|
1108 |
|
1109 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1110 |
|
1111 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
1112 |
|
1113 |
vs->fidp = lookup_fid(s, fid); |
1114 |
if (vs->fidp == NULL) { |
1115 |
err = -ENOENT; |
1116 |
goto out;
|
1117 |
} |
1118 |
|
1119 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1120 |
v9fs_stat_post_lstat(s, vs, err); |
1121 |
return;
|
1122 |
|
1123 |
out:
|
1124 |
complete_pdu(s, vs->pdu, err); |
1125 |
v9fs_stat_free(&vs->v9stat); |
1126 |
qemu_free(vs); |
1127 |
} |
1128 |
|
1129 |
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1130 |
{ |
1131 |
complete_pdu(s, vs->pdu, err); |
1132 |
|
1133 |
if (vs->nwnames) {
|
1134 |
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1135 |
v9fs_string_free(&vs->wnames[vs->name_idx]); |
1136 |
} |
1137 |
|
1138 |
qemu_free(vs->wnames); |
1139 |
qemu_free(vs->qids); |
1140 |
} |
1141 |
} |
1142 |
|
1143 |
static void v9fs_walk_marshal(V9fsWalkState *vs) |
1144 |
{ |
1145 |
int i;
|
1146 |
vs->offset = 7;
|
1147 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
1148 |
|
1149 |
for (i = 0; i < vs->nwnames; i++) { |
1150 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
1151 |
} |
1152 |
} |
1153 |
|
1154 |
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1155 |
int err)
|
1156 |
{ |
1157 |
if (err == -1) { |
1158 |
free_fid(s, vs->newfidp->fid); |
1159 |
v9fs_string_free(&vs->path); |
1160 |
err = -ENOENT; |
1161 |
goto out;
|
1162 |
} |
1163 |
|
1164 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1165 |
|
1166 |
vs->name_idx++; |
1167 |
if (vs->name_idx < vs->nwnames) {
|
1168 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1169 |
vs->wnames[vs->name_idx].data); |
1170 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1171 |
|
1172 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1173 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1174 |
return;
|
1175 |
} |
1176 |
|
1177 |
v9fs_string_free(&vs->path); |
1178 |
v9fs_walk_marshal(vs); |
1179 |
err = vs->offset; |
1180 |
out:
|
1181 |
v9fs_walk_complete(s, vs, err); |
1182 |
} |
1183 |
|
1184 |
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1185 |
int err)
|
1186 |
{ |
1187 |
if (err == -1) { |
1188 |
v9fs_string_free(&vs->path); |
1189 |
err = -ENOENT; |
1190 |
goto out;
|
1191 |
} |
1192 |
|
1193 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1194 |
vs->name_idx++; |
1195 |
if (vs->name_idx < vs->nwnames) {
|
1196 |
|
1197 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1198 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1199 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1200 |
|
1201 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1202 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1203 |
return;
|
1204 |
} |
1205 |
|
1206 |
v9fs_string_free(&vs->path); |
1207 |
v9fs_walk_marshal(vs); |
1208 |
err = vs->offset; |
1209 |
out:
|
1210 |
v9fs_walk_complete(s, vs, err); |
1211 |
} |
1212 |
|
1213 |
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1214 |
{ |
1215 |
int32_t fid, newfid; |
1216 |
V9fsWalkState *vs; |
1217 |
int err = 0; |
1218 |
int i;
|
1219 |
|
1220 |
vs = qemu_malloc(sizeof(*vs));
|
1221 |
vs->pdu = pdu; |
1222 |
vs->wnames = NULL;
|
1223 |
vs->qids = NULL;
|
1224 |
vs->offset = 7;
|
1225 |
|
1226 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
1227 |
&newfid, &vs->nwnames); |
1228 |
|
1229 |
if (vs->nwnames) {
|
1230 |
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
1231 |
|
1232 |
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); |
1233 |
|
1234 |
for (i = 0; i < vs->nwnames; i++) { |
1235 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
1236 |
&vs->wnames[i]); |
1237 |
} |
1238 |
} |
1239 |
|
1240 |
vs->fidp = lookup_fid(s, fid); |
1241 |
if (vs->fidp == NULL) { |
1242 |
err = -ENOENT; |
1243 |
goto out;
|
1244 |
} |
1245 |
|
1246 |
/* FIXME: is this really valid? */
|
1247 |
if (fid == newfid) {
|
1248 |
|
1249 |
BUG_ON(vs->fidp->fd != -1);
|
1250 |
BUG_ON(vs->fidp->dir); |
1251 |
v9fs_string_init(&vs->path); |
1252 |
vs->name_idx = 0;
|
1253 |
|
1254 |
if (vs->name_idx < vs->nwnames) {
|
1255 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1256 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1257 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1258 |
|
1259 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1260 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1261 |
return;
|
1262 |
} |
1263 |
} else {
|
1264 |
vs->newfidp = alloc_fid(s, newfid); |
1265 |
if (vs->newfidp == NULL) { |
1266 |
err = -EINVAL; |
1267 |
goto out;
|
1268 |
} |
1269 |
|
1270 |
vs->newfidp->uid = vs->fidp->uid; |
1271 |
v9fs_string_init(&vs->path); |
1272 |
vs->name_idx = 0;
|
1273 |
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); |
1274 |
|
1275 |
if (vs->name_idx < vs->nwnames) {
|
1276 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1277 |
vs->wnames[vs->name_idx].data); |
1278 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1279 |
|
1280 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1281 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1282 |
return;
|
1283 |
} |
1284 |
} |
1285 |
|
1286 |
v9fs_walk_marshal(vs); |
1287 |
err = vs->offset; |
1288 |
out:
|
1289 |
v9fs_walk_complete(s, vs, err); |
1290 |
} |
1291 |
|
1292 |
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1293 |
{ |
1294 |
if (vs->fidp->dir == NULL) { |
1295 |
err = -errno; |
1296 |
goto out;
|
1297 |
} |
1298 |
|
1299 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1300 |
err = vs->offset; |
1301 |
out:
|
1302 |
complete_pdu(s, vs->pdu, err); |
1303 |
qemu_free(vs); |
1304 |
|
1305 |
} |
1306 |
|
1307 |
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1308 |
{ |
1309 |
if (vs->fidp->fd == -1) { |
1310 |
err = -errno; |
1311 |
goto out;
|
1312 |
} |
1313 |
|
1314 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1315 |
err = vs->offset; |
1316 |
out:
|
1317 |
complete_pdu(s, vs->pdu, err); |
1318 |
qemu_free(vs); |
1319 |
} |
1320 |
|
1321 |
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) |
1322 |
{ |
1323 |
if (err) {
|
1324 |
err = -errno; |
1325 |
goto out;
|
1326 |
} |
1327 |
|
1328 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1329 |
|
1330 |
if (S_ISDIR(vs->stbuf.st_mode)) {
|
1331 |
vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path); |
1332 |
v9fs_open_post_opendir(s, vs, err); |
1333 |
} else {
|
1334 |
vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path, |
1335 |
omode_to_uflags(vs->mode)); |
1336 |
v9fs_open_post_open(s, vs, err); |
1337 |
} |
1338 |
return;
|
1339 |
out:
|
1340 |
complete_pdu(s, vs->pdu, err); |
1341 |
qemu_free(vs); |
1342 |
} |
1343 |
|
1344 |
static void v9fs_open(V9fsState *s, V9fsPDU *pdu) |
1345 |
{ |
1346 |
int32_t fid; |
1347 |
V9fsOpenState *vs; |
1348 |
ssize_t err = 0;
|
1349 |
|
1350 |
|
1351 |
vs = qemu_malloc(sizeof(*vs));
|
1352 |
vs->pdu = pdu; |
1353 |
vs->offset = 7;
|
1354 |
|
1355 |
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
1356 |
|
1357 |
vs->fidp = lookup_fid(s, fid); |
1358 |
if (vs->fidp == NULL) { |
1359 |
err = -ENOENT; |
1360 |
goto out;
|
1361 |
} |
1362 |
|
1363 |
BUG_ON(vs->fidp->fd != -1);
|
1364 |
BUG_ON(vs->fidp->dir); |
1365 |
|
1366 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1367 |
|
1368 |
v9fs_open_post_lstat(s, vs, err); |
1369 |
return;
|
1370 |
out:
|
1371 |
complete_pdu(s, pdu, err); |
1372 |
qemu_free(vs); |
1373 |
} |
1374 |
|
1375 |
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
1376 |
{ |
1377 |
int32_t fid; |
1378 |
size_t offset = 7;
|
1379 |
int err;
|
1380 |
|
1381 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1382 |
|
1383 |
err = free_fid(s, fid); |
1384 |
if (err < 0) { |
1385 |
goto out;
|
1386 |
} |
1387 |
|
1388 |
offset = 7;
|
1389 |
err = offset; |
1390 |
out:
|
1391 |
complete_pdu(s, pdu, err); |
1392 |
} |
1393 |
|
1394 |
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1395 |
|
1396 |
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1397 |
{ |
1398 |
if (err) {
|
1399 |
goto out;
|
1400 |
} |
1401 |
v9fs_stat_free(&vs->v9stat); |
1402 |
v9fs_string_free(&vs->name); |
1403 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1404 |
vs->offset += vs->count; |
1405 |
err = vs->offset; |
1406 |
out:
|
1407 |
complete_pdu(s, vs->pdu, err); |
1408 |
qemu_free(vs); |
1409 |
return;
|
1410 |
} |
1411 |
|
1412 |
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, |
1413 |
ssize_t err) |
1414 |
{ |
1415 |
if (err) {
|
1416 |
err = -errno; |
1417 |
goto out;
|
1418 |
} |
1419 |
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); |
1420 |
if (err) {
|
1421 |
goto out;
|
1422 |
} |
1423 |
|
1424 |
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", |
1425 |
&vs->v9stat); |
1426 |
if ((vs->len != (vs->v9stat.size + 2)) || |
1427 |
((vs->count + vs->len) > vs->max_count)) { |
1428 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); |
1429 |
v9fs_read_post_seekdir(s, vs, err); |
1430 |
return;
|
1431 |
} |
1432 |
vs->count += vs->len; |
1433 |
v9fs_stat_free(&vs->v9stat); |
1434 |
v9fs_string_free(&vs->name); |
1435 |
vs->dir_pos = vs->dent->d_off; |
1436 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
1437 |
v9fs_read_post_readdir(s, vs, err); |
1438 |
return;
|
1439 |
out:
|
1440 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); |
1441 |
v9fs_read_post_seekdir(s, vs, err); |
1442 |
return;
|
1443 |
|
1444 |
} |
1445 |
|
1446 |
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1447 |
{ |
1448 |
if (vs->dent) {
|
1449 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1450 |
v9fs_string_init(&vs->name); |
1451 |
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
1452 |
vs->dent->d_name); |
1453 |
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); |
1454 |
v9fs_read_post_dir_lstat(s, vs, err); |
1455 |
return;
|
1456 |
} |
1457 |
|
1458 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1459 |
vs->offset += vs->count; |
1460 |
err = vs->offset; |
1461 |
complete_pdu(s, vs->pdu, err); |
1462 |
qemu_free(vs); |
1463 |
return;
|
1464 |
} |
1465 |
|
1466 |
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1467 |
{ |
1468 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
1469 |
v9fs_read_post_readdir(s, vs, err); |
1470 |
return;
|
1471 |
} |
1472 |
|
1473 |
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, |
1474 |
ssize_t err) |
1475 |
{ |
1476 |
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir); |
1477 |
v9fs_read_post_telldir(s, vs, err); |
1478 |
return;
|
1479 |
} |
1480 |
|
1481 |
static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1482 |
{ |
1483 |
if (err < 0) { |
1484 |
/* IO error return the error */
|
1485 |
err = -errno; |
1486 |
goto out;
|
1487 |
} |
1488 |
vs->total += vs->len; |
1489 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
1490 |
if (vs->total < vs->count && vs->len > 0) { |
1491 |
do {
|
1492 |
if (0) { |
1493 |
print_sg(vs->sg, vs->cnt); |
1494 |
} |
1495 |
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); |
1496 |
} while (vs->len == -1 && errno == EINTR); |
1497 |
if (vs->len == -1) { |
1498 |
err = -errno; |
1499 |
} |
1500 |
v9fs_read_post_readv(s, vs, err); |
1501 |
return;
|
1502 |
} |
1503 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
1504 |
vs->offset += vs->count; |
1505 |
err = vs->offset; |
1506 |
|
1507 |
out:
|
1508 |
complete_pdu(s, vs->pdu, err); |
1509 |
qemu_free(vs); |
1510 |
} |
1511 |
|
1512 |
static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1513 |
{ |
1514 |
if (err == -1) { |
1515 |
err = -errno; |
1516 |
goto out;
|
1517 |
} |
1518 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1519 |
|
1520 |
if (vs->total < vs->count) {
|
1521 |
do {
|
1522 |
if (0) { |
1523 |
print_sg(vs->sg, vs->cnt); |
1524 |
} |
1525 |
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); |
1526 |
} while (vs->len == -1 && errno == EINTR); |
1527 |
if (vs->len == -1) { |
1528 |
err = -errno; |
1529 |
} |
1530 |
v9fs_read_post_readv(s, vs, err); |
1531 |
return;
|
1532 |
} |
1533 |
out:
|
1534 |
complete_pdu(s, vs->pdu, err); |
1535 |
qemu_free(vs); |
1536 |
} |
1537 |
|
1538 |
static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
1539 |
{ |
1540 |
int32_t fid; |
1541 |
V9fsReadState *vs; |
1542 |
ssize_t err = 0;
|
1543 |
|
1544 |
vs = qemu_malloc(sizeof(*vs));
|
1545 |
vs->pdu = pdu; |
1546 |
vs->offset = 7;
|
1547 |
vs->total = 0;
|
1548 |
vs->len = 0;
|
1549 |
vs->count = 0;
|
1550 |
|
1551 |
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
1552 |
|
1553 |
vs->fidp = lookup_fid(s, fid); |
1554 |
if (vs->fidp == NULL) { |
1555 |
err = -EINVAL; |
1556 |
goto out;
|
1557 |
} |
1558 |
|
1559 |
if (vs->fidp->dir) {
|
1560 |
vs->max_count = vs->count; |
1561 |
vs->count = 0;
|
1562 |
if (vs->off == 0) { |
1563 |
v9fs_do_rewinddir(s, vs->fidp->dir); |
1564 |
} |
1565 |
v9fs_read_post_rewinddir(s, vs, err); |
1566 |
return;
|
1567 |
} else if (vs->fidp->fd != -1) { |
1568 |
vs->sg = vs->iov; |
1569 |
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); |
1570 |
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); |
1571 |
v9fs_read_post_lseek(s, vs, err); |
1572 |
return;
|
1573 |
} else {
|
1574 |
err = -EINVAL; |
1575 |
} |
1576 |
out:
|
1577 |
complete_pdu(s, pdu, err); |
1578 |
qemu_free(vs); |
1579 |
} |
1580 |
|
1581 |
static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, |
1582 |
ssize_t err) |
1583 |
{ |
1584 |
if (err < 0) { |
1585 |
/* IO error return the error */
|
1586 |
err = -errno; |
1587 |
goto out;
|
1588 |
} |
1589 |
vs->total += vs->len; |
1590 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
1591 |
if (vs->total < vs->count && vs->len > 0) { |
1592 |
do {
|
1593 |
if (0) { |
1594 |
print_sg(vs->sg, vs->cnt); |
1595 |
} |
1596 |
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); |
1597 |
} while (vs->len == -1 && errno == EINTR); |
1598 |
if (vs->len == -1) { |
1599 |
err = -errno; |
1600 |
} |
1601 |
v9fs_write_post_writev(s, vs, err); |
1602 |
return;
|
1603 |
} |
1604 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
1605 |
|
1606 |
err = vs->offset; |
1607 |
out:
|
1608 |
complete_pdu(s, vs->pdu, err); |
1609 |
qemu_free(vs); |
1610 |
} |
1611 |
|
1612 |
static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) |
1613 |
{ |
1614 |
if (err == -1) { |
1615 |
err = -errno; |
1616 |
goto out;
|
1617 |
} |
1618 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1619 |
|
1620 |
if (vs->total < vs->count) {
|
1621 |
do {
|
1622 |
if (0) { |
1623 |
print_sg(vs->sg, vs->cnt); |
1624 |
} |
1625 |
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); |
1626 |
} while (vs->len == -1 && errno == EINTR); |
1627 |
if (vs->len == -1) { |
1628 |
err = -errno; |
1629 |
} |
1630 |
v9fs_write_post_writev(s, vs, err); |
1631 |
return;
|
1632 |
} |
1633 |
|
1634 |
out:
|
1635 |
complete_pdu(s, vs->pdu, err); |
1636 |
qemu_free(vs); |
1637 |
} |
1638 |
|
1639 |
static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
1640 |
{ |
1641 |
int32_t fid; |
1642 |
V9fsWriteState *vs; |
1643 |
ssize_t err; |
1644 |
|
1645 |
vs = qemu_malloc(sizeof(*vs));
|
1646 |
|
1647 |
vs->pdu = pdu; |
1648 |
vs->offset = 7;
|
1649 |
vs->sg = vs->iov; |
1650 |
vs->total = 0;
|
1651 |
vs->len = 0;
|
1652 |
|
1653 |
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
1654 |
vs->sg, &vs->cnt); |
1655 |
|
1656 |
vs->fidp = lookup_fid(s, fid); |
1657 |
if (vs->fidp == NULL) { |
1658 |
err = -EINVAL; |
1659 |
goto out;
|
1660 |
} |
1661 |
|
1662 |
if (vs->fidp->fd == -1) { |
1663 |
err = -EINVAL; |
1664 |
goto out;
|
1665 |
} |
1666 |
|
1667 |
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); |
1668 |
|
1669 |
v9fs_write_post_lseek(s, vs, err); |
1670 |
return;
|
1671 |
|
1672 |
out:
|
1673 |
complete_pdu(s, vs->pdu, err); |
1674 |
qemu_free(vs); |
1675 |
} |
1676 |
|
1677 |
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
1678 |
{ |
1679 |
if (err == 0) { |
1680 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
1681 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1682 |
|
1683 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1684 |
|
1685 |
err = vs->offset; |
1686 |
} |
1687 |
|
1688 |
complete_pdu(s, vs->pdu, err); |
1689 |
v9fs_string_free(&vs->name); |
1690 |
v9fs_string_free(&vs->extension); |
1691 |
v9fs_string_free(&vs->fullname); |
1692 |
qemu_free(vs); |
1693 |
} |
1694 |
|
1695 |
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) |
1696 |
{ |
1697 |
if (err) {
|
1698 |
err = -errno; |
1699 |
} |
1700 |
v9fs_post_create(s, vs, err); |
1701 |
} |
1702 |
|
1703 |
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, |
1704 |
int err)
|
1705 |
{ |
1706 |
if (!vs->fidp->dir) {
|
1707 |
err = -errno; |
1708 |
} |
1709 |
v9fs_post_create(s, vs, err); |
1710 |
} |
1711 |
|
1712 |
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, |
1713 |
int err)
|
1714 |
{ |
1715 |
if (err) {
|
1716 |
err = -errno; |
1717 |
goto out;
|
1718 |
} |
1719 |
|
1720 |
vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname); |
1721 |
v9fs_create_post_opendir(s, vs, err); |
1722 |
return;
|
1723 |
|
1724 |
out:
|
1725 |
v9fs_post_create(s, vs, err); |
1726 |
} |
1727 |
|
1728 |
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) |
1729 |
{ |
1730 |
if (err) {
|
1731 |
err = -errno; |
1732 |
goto out;
|
1733 |
} |
1734 |
|
1735 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
1736 |
v9fs_create_post_dir_lstat(s, vs, err); |
1737 |
return;
|
1738 |
|
1739 |
out:
|
1740 |
v9fs_post_create(s, vs, err); |
1741 |
} |
1742 |
|
1743 |
static void v9fs_create_post_mksock(V9fsState *s, V9fsCreateState *vs, |
1744 |
int err)
|
1745 |
{ |
1746 |
if (err) {
|
1747 |
err = -errno; |
1748 |
goto out;
|
1749 |
} |
1750 |
|
1751 |
err = v9fs_do_chmod(s, &vs->fullname, vs->perm & 0777);
|
1752 |
v9fs_create_post_perms(s, vs, err); |
1753 |
return;
|
1754 |
|
1755 |
out:
|
1756 |
v9fs_post_create(s, vs, err); |
1757 |
} |
1758 |
|
1759 |
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
1760 |
{ |
1761 |
if (err) {
|
1762 |
vs->fidp->fd = -1;
|
1763 |
err = -errno; |
1764 |
} |
1765 |
|
1766 |
v9fs_post_create(s, vs, err); |
1767 |
return;
|
1768 |
} |
1769 |
|
1770 |
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) |
1771 |
{ |
1772 |
if (vs->fidp->fd == -1) { |
1773 |
err = -errno; |
1774 |
goto out;
|
1775 |
} |
1776 |
|
1777 |
err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf); |
1778 |
v9fs_create_post_fstat(s, vs, err); |
1779 |
|
1780 |
return;
|
1781 |
|
1782 |
out:
|
1783 |
v9fs_post_create(s, vs, err); |
1784 |
|
1785 |
} |
1786 |
|
1787 |
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) |
1788 |
{ |
1789 |
|
1790 |
if (err == 0 || errno != ENOENT) { |
1791 |
err = -errno; |
1792 |
goto out;
|
1793 |
} |
1794 |
|
1795 |
if (vs->perm & P9_STAT_MODE_DIR) {
|
1796 |
err = v9fs_do_mkdir(s, vs); |
1797 |
v9fs_create_post_mkdir(s, vs, err); |
1798 |
} else if (vs->perm & P9_STAT_MODE_SYMLINK) { |
1799 |
err = v9fs_do_symlink(s, vs); |
1800 |
v9fs_create_post_perms(s, vs, err); |
1801 |
} else if (vs->perm & P9_STAT_MODE_LINK) { |
1802 |
int32_t nfid = atoi(vs->extension.data); |
1803 |
V9fsFidState *nfidp = lookup_fid(s, nfid); |
1804 |
if (nfidp == NULL) { |
1805 |
err = -errno; |
1806 |
v9fs_post_create(s, vs, err); |
1807 |
} |
1808 |
err = v9fs_do_link(s, &nfidp->path, &vs->fullname); |
1809 |
v9fs_create_post_perms(s, vs, err); |
1810 |
} else if (vs->perm & P9_STAT_MODE_DEVICE) { |
1811 |
char ctype;
|
1812 |
uint32_t major, minor; |
1813 |
mode_t nmode = 0;
|
1814 |
|
1815 |
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, |
1816 |
&minor) != 3) {
|
1817 |
err = -errno; |
1818 |
v9fs_post_create(s, vs, err); |
1819 |
} |
1820 |
|
1821 |
switch (ctype) {
|
1822 |
case 'c': |
1823 |
nmode = S_IFCHR; |
1824 |
break;
|
1825 |
case 'b': |
1826 |
nmode = S_IFBLK; |
1827 |
break;
|
1828 |
default:
|
1829 |
err = -EIO; |
1830 |
v9fs_post_create(s, vs, err); |
1831 |
} |
1832 |
|
1833 |
nmode |= vs->perm & 0777;
|
1834 |
err = v9fs_do_mknod(s, vs, nmode, makedev(major, minor)); |
1835 |
v9fs_create_post_perms(s, vs, err); |
1836 |
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { |
1837 |
err = v9fs_do_mknod(s, vs, S_IFIFO | (vs->perm & 0777), 0); |
1838 |
v9fs_post_create(s, vs, err); |
1839 |
} else if (vs->perm & P9_STAT_MODE_SOCKET) { |
1840 |
err = v9fs_do_mksock(s, &vs->fullname); |
1841 |
v9fs_create_post_mksock(s, vs, err); |
1842 |
} else {
|
1843 |
vs->fidp->fd = v9fs_do_open2(s, vs); |
1844 |
v9fs_create_post_open2(s, vs, err); |
1845 |
} |
1846 |
|
1847 |
return;
|
1848 |
|
1849 |
out:
|
1850 |
v9fs_post_create(s, vs, err); |
1851 |
} |
1852 |
|
1853 |
static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
1854 |
{ |
1855 |
int32_t fid; |
1856 |
V9fsCreateState *vs; |
1857 |
int err = 0; |
1858 |
|
1859 |
vs = qemu_malloc(sizeof(*vs));
|
1860 |
vs->pdu = pdu; |
1861 |
vs->offset = 7;
|
1862 |
|
1863 |
v9fs_string_init(&vs->fullname); |
1864 |
|
1865 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
1866 |
&vs->perm, &vs->mode, &vs->extension); |
1867 |
|
1868 |
vs->fidp = lookup_fid(s, fid); |
1869 |
if (vs->fidp == NULL) { |
1870 |
err = -EINVAL; |
1871 |
goto out;
|
1872 |
} |
1873 |
|
1874 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
1875 |
vs->name.data); |
1876 |
|
1877 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
1878 |
v9fs_create_post_lstat(s, vs, err); |
1879 |
return;
|
1880 |
|
1881 |
out:
|
1882 |
complete_pdu(s, vs->pdu, err); |
1883 |
v9fs_string_free(&vs->name); |
1884 |
v9fs_string_free(&vs->extension); |
1885 |
qemu_free(vs); |
1886 |
} |
1887 |
|
1888 |
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
1889 |
{ |
1890 |
/* A nop call with no return */
|
1891 |
complete_pdu(s, pdu, 7);
|
1892 |
} |
1893 |
|
1894 |
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
1895 |
int err)
|
1896 |
{ |
1897 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
1898 |
err = free_fid(s, vs->fidp->fid); |
1899 |
if (err < 0) { |
1900 |
goto out;
|
1901 |
} |
1902 |
|
1903 |
err = vs->offset; |
1904 |
out:
|
1905 |
complete_pdu(s, vs->pdu, err); |
1906 |
qemu_free(vs); |
1907 |
} |
1908 |
|
1909 |
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
1910 |
{ |
1911 |
int32_t fid; |
1912 |
V9fsRemoveState *vs; |
1913 |
int err = 0; |
1914 |
|
1915 |
vs = qemu_malloc(sizeof(*vs));
|
1916 |
vs->pdu = pdu; |
1917 |
vs->offset = 7;
|
1918 |
|
1919 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
1920 |
|
1921 |
vs->fidp = lookup_fid(s, fid); |
1922 |
if (vs->fidp == NULL) { |
1923 |
err = -EINVAL; |
1924 |
goto out;
|
1925 |
} |
1926 |
|
1927 |
err = v9fs_do_remove(s, &vs->fidp->path); |
1928 |
v9fs_remove_post_remove(s, vs, err); |
1929 |
return;
|
1930 |
|
1931 |
out:
|
1932 |
complete_pdu(s, pdu, err); |
1933 |
qemu_free(vs); |
1934 |
} |
1935 |
|
1936 |
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
1937 |
{ |
1938 |
if (err < 0) { |
1939 |
goto out;
|
1940 |
} |
1941 |
|
1942 |
err = vs->offset; |
1943 |
|
1944 |
out:
|
1945 |
v9fs_stat_free(&vs->v9stat); |
1946 |
complete_pdu(s, vs->pdu, err); |
1947 |
qemu_free(vs); |
1948 |
} |
1949 |
|
1950 |
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) |
1951 |
{ |
1952 |
if (err < 0) { |
1953 |
goto out;
|
1954 |
} |
1955 |
|
1956 |
if (vs->v9stat.name.size != 0) { |
1957 |
v9fs_string_free(&vs->nname); |
1958 |
} |
1959 |
|
1960 |
if (vs->v9stat.length != -1) { |
1961 |
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { |
1962 |
err = -errno; |
1963 |
} |
1964 |
} |
1965 |
v9fs_wstat_post_truncate(s, vs, err); |
1966 |
return;
|
1967 |
|
1968 |
out:
|
1969 |
v9fs_stat_free(&vs->v9stat); |
1970 |
complete_pdu(s, vs->pdu, err); |
1971 |
qemu_free(vs); |
1972 |
} |
1973 |
|
1974 |
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
1975 |
{ |
1976 |
V9fsFidState *fidp; |
1977 |
if (err < 0) { |
1978 |
goto out;
|
1979 |
} |
1980 |
|
1981 |
if (vs->v9stat.name.size != 0) { |
1982 |
char *old_name, *new_name;
|
1983 |
char *end;
|
1984 |
|
1985 |
old_name = vs->fidp->path.data; |
1986 |
end = strrchr(old_name, '/');
|
1987 |
if (end) {
|
1988 |
end++; |
1989 |
} else {
|
1990 |
end = old_name; |
1991 |
} |
1992 |
|
1993 |
new_name = qemu_malloc(end - old_name + vs->v9stat.name.size + 1);
|
1994 |
|
1995 |
memset(new_name, 0, end - old_name + vs->v9stat.name.size + 1); |
1996 |
memcpy(new_name, old_name, end - old_name); |
1997 |
memcpy(new_name + (end - old_name), vs->v9stat.name.data, |
1998 |
vs->v9stat.name.size); |
1999 |
vs->nname.data = new_name; |
2000 |
vs->nname.size = strlen(new_name); |
2001 |
|
2002 |
if (strcmp(new_name, vs->fidp->path.data) != 0) { |
2003 |
if (v9fs_do_rename(s, &vs->fidp->path, &vs->nname)) {
|
2004 |
err = -errno; |
2005 |
} else {
|
2006 |
/*
|
2007 |
* Fixup fid's pointing to the old name to
|
2008 |
* start pointing to the new name
|
2009 |
*/
|
2010 |
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
2011 |
|
2012 |
if (vs->fidp == fidp) {
|
2013 |
/*
|
2014 |
* we replace name of this fid towards the end
|
2015 |
* so that our below strcmp will work
|
2016 |
*/
|
2017 |
continue;
|
2018 |
} |
2019 |
if (!strncmp(vs->fidp->path.data, fidp->path.data,
|
2020 |
strlen(vs->fidp->path.data))) { |
2021 |
/* replace the name */
|
2022 |
v9fs_fix_path(&fidp->path, &vs->nname, |
2023 |
strlen(vs->fidp->path.data)); |
2024 |
} |
2025 |
} |
2026 |
v9fs_string_copy(&vs->fidp->path, &vs->nname); |
2027 |
} |
2028 |
} |
2029 |
} |
2030 |
v9fs_wstat_post_rename(s, vs, err); |
2031 |
return;
|
2032 |
|
2033 |
out:
|
2034 |
v9fs_stat_free(&vs->v9stat); |
2035 |
complete_pdu(s, vs->pdu, err); |
2036 |
qemu_free(vs); |
2037 |
} |
2038 |
|
2039 |
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2040 |
{ |
2041 |
if (err < 0) { |
2042 |
goto out;
|
2043 |
} |
2044 |
|
2045 |
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
2046 |
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
2047 |
vs->v9stat.n_gid)) { |
2048 |
err = -errno; |
2049 |
} |
2050 |
} |
2051 |
v9fs_wstat_post_chown(s, vs, err); |
2052 |
return;
|
2053 |
|
2054 |
out:
|
2055 |
v9fs_stat_free(&vs->v9stat); |
2056 |
complete_pdu(s, vs->pdu, err); |
2057 |
qemu_free(vs); |
2058 |
} |
2059 |
|
2060 |
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) |
2061 |
{ |
2062 |
if (err < 0) { |
2063 |
goto out;
|
2064 |
} |
2065 |
|
2066 |
if (vs->v9stat.mtime != -1) { |
2067 |
struct utimbuf tb;
|
2068 |
tb.actime = 0;
|
2069 |
tb.modtime = vs->v9stat.mtime; |
2070 |
if (v9fs_do_utime(s, &vs->fidp->path, &tb)) {
|
2071 |
err = -errno; |
2072 |
} |
2073 |
} |
2074 |
|
2075 |
v9fs_wstat_post_utime(s, vs, err); |
2076 |
return;
|
2077 |
|
2078 |
out:
|
2079 |
v9fs_stat_free(&vs->v9stat); |
2080 |
complete_pdu(s, vs->pdu, err); |
2081 |
qemu_free(vs); |
2082 |
} |
2083 |
|
2084 |
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) |
2085 |
{ |
2086 |
if (err == -1) { |
2087 |
err = -errno; |
2088 |
} |
2089 |
v9fs_stat_free(&vs->v9stat); |
2090 |
complete_pdu(s, vs->pdu, err); |
2091 |
qemu_free(vs); |
2092 |
} |
2093 |
|
2094 |
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) |
2095 |
{ |
2096 |
uint32_t v9_mode; |
2097 |
|
2098 |
if (err == -1) { |
2099 |
err = -errno; |
2100 |
goto out;
|
2101 |
} |
2102 |
|
2103 |
v9_mode = stat_to_v9mode(&vs->stbuf); |
2104 |
|
2105 |
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
2106 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) { |
2107 |
/* Attempting to change the type */
|
2108 |
err = -EIO; |
2109 |
goto out;
|
2110 |
} |
2111 |
|
2112 |
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
2113 |
&vs->v9stat.extension))) { |
2114 |
err = -errno; |
2115 |
} |
2116 |
v9fs_wstat_post_chmod(s, vs, err); |
2117 |
return;
|
2118 |
|
2119 |
out:
|
2120 |
v9fs_stat_free(&vs->v9stat); |
2121 |
complete_pdu(s, vs->pdu, err); |
2122 |
qemu_free(vs); |
2123 |
} |
2124 |
|
2125 |
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
2126 |
{ |
2127 |
int32_t fid; |
2128 |
V9fsWstatState *vs; |
2129 |
int err = 0; |
2130 |
|
2131 |
vs = qemu_malloc(sizeof(*vs));
|
2132 |
vs->pdu = pdu; |
2133 |
vs->offset = 7;
|
2134 |
|
2135 |
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
2136 |
|
2137 |
vs->fidp = lookup_fid(s, fid); |
2138 |
if (vs->fidp == NULL) { |
2139 |
err = -EINVAL; |
2140 |
goto out;
|
2141 |
} |
2142 |
|
2143 |
/* do we need to sync the file? */
|
2144 |
if (donttouch_stat(&vs->v9stat)) {
|
2145 |
err = v9fs_do_fsync(s, vs->fidp->fd); |
2146 |
v9fs_wstat_post_fsync(s, vs, err); |
2147 |
return;
|
2148 |
} |
2149 |
|
2150 |
if (vs->v9stat.mode != -1) { |
2151 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
2152 |
v9fs_wstat_post_lstat(s, vs, err); |
2153 |
return;
|
2154 |
} |
2155 |
|
2156 |
v9fs_wstat_post_chmod(s, vs, err); |
2157 |
return;
|
2158 |
|
2159 |
out:
|
2160 |
v9fs_stat_free(&vs->v9stat); |
2161 |
complete_pdu(s, vs->pdu, err); |
2162 |
qemu_free(vs); |
2163 |
} |
2164 |
|
2165 |
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
2166 |
|
2167 |
static pdu_handler_t *pdu_handlers[] = {
|
2168 |
[P9_TVERSION] = v9fs_version, |
2169 |
[P9_TATTACH] = v9fs_attach, |
2170 |
[P9_TSTAT] = v9fs_stat, |
2171 |
[P9_TWALK] = v9fs_walk, |
2172 |
[P9_TCLUNK] = v9fs_clunk, |
2173 |
[P9_TOPEN] = v9fs_open, |
2174 |
[P9_TREAD] = v9fs_read, |
2175 |
#if 0
|
2176 |
[P9_TAUTH] = v9fs_auth,
|
2177 |
#endif
|
2178 |
[P9_TFLUSH] = v9fs_flush, |
2179 |
[P9_TCREATE] = v9fs_create, |
2180 |
[P9_TWRITE] = v9fs_write, |
2181 |
[P9_TWSTAT] = v9fs_wstat, |
2182 |
[P9_TREMOVE] = v9fs_remove, |
2183 |
}; |
2184 |
|
2185 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
2186 |
{ |
2187 |
pdu_handler_t *handler; |
2188 |
|
2189 |
if (debug_9p_pdu) {
|
2190 |
pprint_pdu(pdu); |
2191 |
} |
2192 |
|
2193 |
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); |
2194 |
|
2195 |
handler = pdu_handlers[pdu->id]; |
2196 |
BUG_ON(handler == NULL);
|
2197 |
|
2198 |
handler(s, pdu); |
2199 |
} |
2200 |
|
2201 |
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
2202 |
{ |
2203 |
V9fsState *s = (V9fsState *)vdev; |
2204 |
V9fsPDU *pdu; |
2205 |
ssize_t len; |
2206 |
|
2207 |
while ((pdu = alloc_pdu(s)) &&
|
2208 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
2209 |
uint8_t *ptr; |
2210 |
|
2211 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
2212 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
2213 |
|
2214 |
ptr = pdu->elem.out_sg[0].iov_base;
|
2215 |
|
2216 |
memcpy(&pdu->size, ptr, 4);
|
2217 |
pdu->id = ptr[4];
|
2218 |
memcpy(&pdu->tag, ptr + 5, 2); |
2219 |
|
2220 |
submit_pdu(s, pdu); |
2221 |
} |
2222 |
|
2223 |
free_pdu(s, pdu); |
2224 |
} |
2225 |
|
2226 |
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
2227 |
{ |
2228 |
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
2229 |
return features;
|
2230 |
} |
2231 |
|
2232 |
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
2233 |
{ |
2234 |
return (V9fsState *)vdev;
|
2235 |
} |
2236 |
|
2237 |
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) |
2238 |
{ |
2239 |
struct virtio_9p_config *cfg;
|
2240 |
V9fsState *s = to_virtio_9p(vdev); |
2241 |
|
2242 |
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + |
2243 |
s->tag_len); |
2244 |
stw_raw(&cfg->tag_len, s->tag_len); |
2245 |
memcpy(cfg->tag, s->tag, s->tag_len); |
2246 |
memcpy(config, cfg, s->config_size); |
2247 |
qemu_free(cfg); |
2248 |
} |
2249 |
|
2250 |
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) |
2251 |
{ |
2252 |
V9fsState *s; |
2253 |
int i, len;
|
2254 |
struct stat stat;
|
2255 |
FsTypeEntry *fse; |
2256 |
|
2257 |
|
2258 |
s = (V9fsState *)virtio_common_init("virtio-9p",
|
2259 |
VIRTIO_ID_9P, |
2260 |
sizeof(struct virtio_9p_config)+ |
2261 |
MAX_TAG_LEN, |
2262 |
sizeof(V9fsState));
|
2263 |
|
2264 |
/* initialize pdu allocator */
|
2265 |
QLIST_INIT(&s->free_list); |
2266 |
for (i = 0; i < (MAX_REQ - 1); i++) { |
2267 |
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
2268 |
} |
2269 |
|
2270 |
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); |
2271 |
|
2272 |
fse = get_fsdev_fsentry(conf->fsdev_id); |
2273 |
|
2274 |
if (!fse) {
|
2275 |
/* We don't have a fsdev identified by fsdev_id */
|
2276 |
fprintf(stderr, "Virtio-9p device couldn't find fsdev "
|
2277 |
"with the id %s\n", conf->fsdev_id);
|
2278 |
exit(1);
|
2279 |
} |
2280 |
|
2281 |
if (!fse->path || !conf->tag) {
|
2282 |
/* we haven't specified a mount_tag or the path */
|
2283 |
fprintf(stderr, "fsdev with id %s needs path "
|
2284 |
"and Virtio-9p device needs mount_tag arguments\n",
|
2285 |
conf->fsdev_id); |
2286 |
exit(1);
|
2287 |
} |
2288 |
|
2289 |
if (!strcmp(fse->security_model, "passthrough")) { |
2290 |
/* Files on the Fileserver set to client user credentials */
|
2291 |
s->ctx.fs_sm = SM_PASSTHROUGH; |
2292 |
} else if (!strcmp(fse->security_model, "mapped")) { |
2293 |
/* Files on the fileserver are set to QEMU credentials.
|
2294 |
* Client user credentials are saved in extended attributes.
|
2295 |
*/
|
2296 |
s->ctx.fs_sm = SM_MAPPED; |
2297 |
} else {
|
2298 |
/* user haven't specified a correct security option */
|
2299 |
fprintf(stderr, "one of the following must be specified as the"
|
2300 |
"security option:\n\t security_model=passthrough \n\t "
|
2301 |
"security_model=mapped\n");
|
2302 |
return NULL; |
2303 |
} |
2304 |
|
2305 |
if (lstat(fse->path, &stat)) {
|
2306 |
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
2307 |
exit(1);
|
2308 |
} else if (!S_ISDIR(stat.st_mode)) { |
2309 |
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
2310 |
exit(1);
|
2311 |
} |
2312 |
|
2313 |
s->ctx.fs_root = qemu_strdup(fse->path); |
2314 |
len = strlen(conf->tag); |
2315 |
if (len > MAX_TAG_LEN) {
|
2316 |
len = MAX_TAG_LEN; |
2317 |
} |
2318 |
/* s->tag is non-NULL terminated string */
|
2319 |
s->tag = qemu_malloc(len); |
2320 |
memcpy(s->tag, conf->tag, len); |
2321 |
s->tag_len = len; |
2322 |
s->ctx.uid = -1;
|
2323 |
|
2324 |
s->ops = fse->ops; |
2325 |
s->vdev.get_features = virtio_9p_get_features; |
2326 |
s->config_size = sizeof(struct virtio_9p_config) + |
2327 |
s->tag_len; |
2328 |
s->vdev.get_config = virtio_9p_get_config; |
2329 |
|
2330 |
return &s->vdev;
|
2331 |
} |