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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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|
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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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} |
148 |
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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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} |
154 |
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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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} |
162 |
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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_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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} |
184 |
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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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} |
189 |
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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; |
199 |
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return s->ops->open2(&s->ctx, vs->fullname.data, flags, &cred);
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} |
202 |
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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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} |
213 |
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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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} |
218 |
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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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} |
223 |
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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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} |
239 |
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static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, V9fsStat v9stat) |
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{ |
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struct timespec ts[2]; |
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if (v9stat.atime != -1) { |
245 |
ts[0].tv_sec = v9stat.atime;
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ts[0].tv_nsec = 0; |
247 |
} else {
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ts[0].tv_nsec = UTIME_OMIT;
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} |
250 |
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if (v9stat.mtime != -1) { |
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ts[1].tv_sec = v9stat.mtime;
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ts[1].tv_nsec = 0; |
254 |
} else {
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ts[1].tv_nsec = UTIME_OMIT;
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} |
257 |
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return s->ops->utimensat(&s->ctx, path->data, ts);
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} |
260 |
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261 |
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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} |
265 |
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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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} |
270 |
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static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
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{ |
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return s->ops->statfs(&s->ctx, path->data, stbuf);
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} |
275 |
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static void v9fs_string_init(V9fsString *str) |
277 |
{ |
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str->data = NULL;
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str->size = 0;
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280 |
} |
281 |
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282 |
static void v9fs_string_free(V9fsString *str) |
283 |
{ |
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qemu_free(str->data); |
285 |
str->data = NULL;
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str->size = 0;
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} |
288 |
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static void v9fs_string_null(V9fsString *str) |
290 |
{ |
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v9fs_string_free(str); |
292 |
} |
293 |
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static int number_to_string(void *arg, char type) |
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{ |
296 |
unsigned int ret = 0; |
297 |
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switch (type) {
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299 |
case 'u': { |
300 |
unsigned int num = *(unsigned int *)arg; |
301 |
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do {
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303 |
ret++; |
304 |
num = num/10;
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} while (num);
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306 |
break;
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307 |
} |
308 |
default:
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printf("Number_to_string: Unknown number format\n");
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return -1; |
311 |
} |
312 |
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313 |
return ret;
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314 |
} |
315 |
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316 |
static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) |
317 |
{ |
318 |
va_list ap2; |
319 |
char *iter = (char *)fmt; |
320 |
int len = 0; |
321 |
int nr_args = 0; |
322 |
char *arg_char_ptr;
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323 |
unsigned int arg_uint; |
324 |
|
325 |
/* Find the number of %'s that denotes an argument */
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326 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
327 |
nr_args++; |
328 |
iter++; |
329 |
} |
330 |
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len = strlen(fmt) - 2*nr_args;
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332 |
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333 |
if (!nr_args) {
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334 |
goto alloc_print;
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335 |
} |
336 |
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337 |
va_copy(ap2, ap); |
338 |
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339 |
iter = (char *)fmt;
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340 |
|
341 |
/* Now parse the format string */
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342 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
343 |
iter++; |
344 |
switch (*iter) {
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345 |
case 'u': |
346 |
arg_uint = va_arg(ap2, unsigned int); |
347 |
len += number_to_string((void *)&arg_uint, 'u'); |
348 |
break;
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349 |
case 's': |
350 |
arg_char_ptr = va_arg(ap2, char *);
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351 |
len += strlen(arg_char_ptr); |
352 |
break;
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353 |
case 'c': |
354 |
len += 1;
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355 |
break;
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356 |
default:
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357 |
fprintf(stderr, |
358 |
"v9fs_string_alloc_printf:Incorrect format %c", *iter);
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359 |
return -1; |
360 |
} |
361 |
iter++; |
362 |
} |
363 |
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364 |
alloc_print:
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365 |
*strp = qemu_malloc((len + 1) * sizeof(**strp)); |
366 |
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367 |
return vsprintf(*strp, fmt, ap);
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368 |
} |
369 |
|
370 |
static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
371 |
{ |
372 |
va_list ap; |
373 |
int err;
|
374 |
|
375 |
v9fs_string_free(str); |
376 |
|
377 |
va_start(ap, fmt); |
378 |
err = v9fs_string_alloc_printf(&str->data, fmt, ap); |
379 |
BUG_ON(err == -1);
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380 |
va_end(ap); |
381 |
|
382 |
str->size = err; |
383 |
} |
384 |
|
385 |
static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
386 |
{ |
387 |
v9fs_string_free(lhs); |
388 |
v9fs_string_sprintf(lhs, "%s", rhs->data);
|
389 |
} |
390 |
|
391 |
static size_t v9fs_string_size(V9fsString *str)
|
392 |
{ |
393 |
return str->size;
|
394 |
} |
395 |
|
396 |
static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
|
397 |
{ |
398 |
V9fsFidState *f; |
399 |
|
400 |
for (f = s->fid_list; f; f = f->next) {
|
401 |
if (f->fid == fid) {
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402 |
return f;
|
403 |
} |
404 |
} |
405 |
|
406 |
return NULL; |
407 |
} |
408 |
|
409 |
static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
410 |
{ |
411 |
V9fsFidState *f; |
412 |
|
413 |
f = lookup_fid(s, fid); |
414 |
if (f) {
|
415 |
return NULL; |
416 |
} |
417 |
|
418 |
f = qemu_mallocz(sizeof(V9fsFidState));
|
419 |
|
420 |
f->fid = fid; |
421 |
f->fd = -1;
|
422 |
f->dir = NULL;
|
423 |
|
424 |
f->next = s->fid_list; |
425 |
s->fid_list = f; |
426 |
|
427 |
return f;
|
428 |
} |
429 |
|
430 |
static int free_fid(V9fsState *s, int32_t fid) |
431 |
{ |
432 |
V9fsFidState **fidpp, *fidp; |
433 |
|
434 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
435 |
if ((*fidpp)->fid == fid) {
|
436 |
break;
|
437 |
} |
438 |
} |
439 |
|
440 |
if (*fidpp == NULL) { |
441 |
return -ENOENT;
|
442 |
} |
443 |
|
444 |
fidp = *fidpp; |
445 |
*fidpp = fidp->next; |
446 |
|
447 |
if (fidp->fd != -1) { |
448 |
v9fs_do_close(s, fidp->fd); |
449 |
} |
450 |
if (fidp->dir) {
|
451 |
v9fs_do_closedir(s, fidp->dir); |
452 |
} |
453 |
v9fs_string_free(&fidp->path); |
454 |
qemu_free(fidp); |
455 |
|
456 |
return 0; |
457 |
} |
458 |
|
459 |
#define P9_QID_TYPE_DIR 0x80 |
460 |
#define P9_QID_TYPE_SYMLINK 0x02 |
461 |
|
462 |
#define P9_STAT_MODE_DIR 0x80000000 |
463 |
#define P9_STAT_MODE_APPEND 0x40000000 |
464 |
#define P9_STAT_MODE_EXCL 0x20000000 |
465 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
466 |
#define P9_STAT_MODE_AUTH 0x08000000 |
467 |
#define P9_STAT_MODE_TMP 0x04000000 |
468 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
469 |
#define P9_STAT_MODE_LINK 0x01000000 |
470 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
471 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
472 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
473 |
#define P9_STAT_MODE_SETUID 0x00080000 |
474 |
#define P9_STAT_MODE_SETGID 0x00040000 |
475 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
476 |
|
477 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
478 |
P9_STAT_MODE_SYMLINK | \ |
479 |
P9_STAT_MODE_LINK | \ |
480 |
P9_STAT_MODE_DEVICE | \ |
481 |
P9_STAT_MODE_NAMED_PIPE | \ |
482 |
P9_STAT_MODE_SOCKET) |
483 |
|
484 |
/* This is the algorithm from ufs in spfs */
|
485 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
486 |
{ |
487 |
size_t size; |
488 |
|
489 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
490 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
491 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
492 |
qidp->type = 0;
|
493 |
if (S_ISDIR(stbuf->st_mode)) {
|
494 |
qidp->type |= P9_QID_TYPE_DIR; |
495 |
} |
496 |
if (S_ISLNK(stbuf->st_mode)) {
|
497 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
498 |
} |
499 |
} |
500 |
|
501 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
502 |
{ |
503 |
struct stat stbuf;
|
504 |
int err;
|
505 |
|
506 |
err = v9fs_do_lstat(s, &fidp->path, &stbuf); |
507 |
if (err) {
|
508 |
return err;
|
509 |
} |
510 |
|
511 |
stat_to_qid(&stbuf, qidp); |
512 |
return 0; |
513 |
} |
514 |
|
515 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
516 |
{ |
517 |
V9fsPDU *pdu = NULL;
|
518 |
|
519 |
if (!QLIST_EMPTY(&s->free_list)) {
|
520 |
pdu = QLIST_FIRST(&s->free_list); |
521 |
QLIST_REMOVE(pdu, next); |
522 |
} |
523 |
return pdu;
|
524 |
} |
525 |
|
526 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
527 |
{ |
528 |
if (pdu) {
|
529 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
530 |
} |
531 |
} |
532 |
|
533 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
534 |
size_t offset, size_t size, int pack)
|
535 |
{ |
536 |
int i = 0; |
537 |
size_t copied = 0;
|
538 |
|
539 |
for (i = 0; size && i < sg_count; i++) { |
540 |
size_t len; |
541 |
if (offset >= sg[i].iov_len) {
|
542 |
/* skip this sg */
|
543 |
offset -= sg[i].iov_len; |
544 |
continue;
|
545 |
} else {
|
546 |
len = MIN(sg[i].iov_len - offset, size); |
547 |
if (pack) {
|
548 |
memcpy(sg[i].iov_base + offset, addr, len); |
549 |
} else {
|
550 |
memcpy(addr, sg[i].iov_base + offset, len); |
551 |
} |
552 |
size -= len; |
553 |
copied += len; |
554 |
addr += len; |
555 |
if (size) {
|
556 |
offset = 0;
|
557 |
continue;
|
558 |
} |
559 |
} |
560 |
} |
561 |
|
562 |
return copied;
|
563 |
} |
564 |
|
565 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
566 |
{ |
567 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
568 |
offset, size, 0);
|
569 |
} |
570 |
|
571 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
572 |
size_t size) |
573 |
{ |
574 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
575 |
offset, size, 1);
|
576 |
} |
577 |
|
578 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
579 |
{ |
580 |
size_t pos = 0;
|
581 |
int i, j;
|
582 |
struct iovec *src_sg;
|
583 |
unsigned int num; |
584 |
|
585 |
if (rx) {
|
586 |
src_sg = pdu->elem.in_sg; |
587 |
num = pdu->elem.in_num; |
588 |
} else {
|
589 |
src_sg = pdu->elem.out_sg; |
590 |
num = pdu->elem.out_num; |
591 |
} |
592 |
|
593 |
j = 0;
|
594 |
for (i = 0; i < num; i++) { |
595 |
if (offset <= pos) {
|
596 |
sg[j].iov_base = src_sg[i].iov_base; |
597 |
sg[j].iov_len = src_sg[i].iov_len; |
598 |
j++; |
599 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
600 |
sg[j].iov_base = src_sg[i].iov_base; |
601 |
sg[j].iov_len = src_sg[i].iov_len; |
602 |
sg[j].iov_base += (offset - pos); |
603 |
sg[j].iov_len -= (offset - pos); |
604 |
j++; |
605 |
} |
606 |
pos += src_sg[i].iov_len; |
607 |
} |
608 |
|
609 |
return j;
|
610 |
} |
611 |
|
612 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
613 |
{ |
614 |
size_t old_offset = offset; |
615 |
va_list ap; |
616 |
int i;
|
617 |
|
618 |
va_start(ap, fmt); |
619 |
for (i = 0; fmt[i]; i++) { |
620 |
switch (fmt[i]) {
|
621 |
case 'b': { |
622 |
uint8_t *valp = va_arg(ap, uint8_t *); |
623 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
624 |
break;
|
625 |
} |
626 |
case 'w': { |
627 |
uint16_t val, *valp; |
628 |
valp = va_arg(ap, uint16_t *); |
629 |
val = le16_to_cpupu(valp); |
630 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
631 |
*valp = val; |
632 |
break;
|
633 |
} |
634 |
case 'd': { |
635 |
uint32_t val, *valp; |
636 |
valp = va_arg(ap, uint32_t *); |
637 |
val = le32_to_cpupu(valp); |
638 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
639 |
*valp = val; |
640 |
break;
|
641 |
} |
642 |
case 'q': { |
643 |
uint64_t val, *valp; |
644 |
valp = va_arg(ap, uint64_t *); |
645 |
val = le64_to_cpup(valp); |
646 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
647 |
*valp = val; |
648 |
break;
|
649 |
} |
650 |
case 'v': { |
651 |
struct iovec *iov = va_arg(ap, struct iovec *); |
652 |
int *iovcnt = va_arg(ap, int *); |
653 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
654 |
break;
|
655 |
} |
656 |
case 's': { |
657 |
V9fsString *str = va_arg(ap, V9fsString *); |
658 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
659 |
/* FIXME: sanity check str->size */
|
660 |
str->data = qemu_malloc(str->size + 1);
|
661 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
662 |
str->data[str->size] = 0;
|
663 |
break;
|
664 |
} |
665 |
case 'Q': { |
666 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
667 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
668 |
&qidp->type, &qidp->version, &qidp->path); |
669 |
break;
|
670 |
} |
671 |
case 'S': { |
672 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
673 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
674 |
&statp->size, &statp->type, &statp->dev, |
675 |
&statp->qid, &statp->mode, &statp->atime, |
676 |
&statp->mtime, &statp->length, |
677 |
&statp->name, &statp->uid, &statp->gid, |
678 |
&statp->muid, &statp->extension, |
679 |
&statp->n_uid, &statp->n_gid, |
680 |
&statp->n_muid); |
681 |
break;
|
682 |
} |
683 |
default:
|
684 |
break;
|
685 |
} |
686 |
} |
687 |
|
688 |
va_end(ap); |
689 |
|
690 |
return offset - old_offset;
|
691 |
} |
692 |
|
693 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
694 |
{ |
695 |
size_t old_offset = offset; |
696 |
va_list ap; |
697 |
int i;
|
698 |
|
699 |
va_start(ap, fmt); |
700 |
for (i = 0; fmt[i]; i++) { |
701 |
switch (fmt[i]) {
|
702 |
case 'b': { |
703 |
uint8_t val = va_arg(ap, int);
|
704 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
705 |
break;
|
706 |
} |
707 |
case 'w': { |
708 |
uint16_t val; |
709 |
cpu_to_le16w(&val, va_arg(ap, int));
|
710 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
711 |
break;
|
712 |
} |
713 |
case 'd': { |
714 |
uint32_t val; |
715 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
716 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
717 |
break;
|
718 |
} |
719 |
case 'q': { |
720 |
uint64_t val; |
721 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
722 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
723 |
break;
|
724 |
} |
725 |
case 'v': { |
726 |
struct iovec *iov = va_arg(ap, struct iovec *); |
727 |
int *iovcnt = va_arg(ap, int *); |
728 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
729 |
break;
|
730 |
} |
731 |
case 's': { |
732 |
V9fsString *str = va_arg(ap, V9fsString *); |
733 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
734 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
735 |
break;
|
736 |
} |
737 |
case 'Q': { |
738 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
739 |
offset += pdu_marshal(pdu, offset, "bdq",
|
740 |
qidp->type, qidp->version, qidp->path); |
741 |
break;
|
742 |
} |
743 |
case 'S': { |
744 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
745 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
746 |
statp->size, statp->type, statp->dev, |
747 |
&statp->qid, statp->mode, statp->atime, |
748 |
statp->mtime, statp->length, &statp->name, |
749 |
&statp->uid, &statp->gid, &statp->muid, |
750 |
&statp->extension, statp->n_uid, |
751 |
statp->n_gid, statp->n_muid); |
752 |
break;
|
753 |
} |
754 |
case 'A': { |
755 |
V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); |
756 |
offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
|
757 |
statp->st_result_mask, |
758 |
&statp->qid, statp->st_mode, |
759 |
statp->st_uid, statp->st_gid, |
760 |
statp->st_nlink, statp->st_rdev, |
761 |
statp->st_size, statp->st_blksize, statp->st_blocks, |
762 |
statp->st_atime_sec, statp->st_atime_nsec, |
763 |
statp->st_mtime_sec, statp->st_mtime_nsec, |
764 |
statp->st_ctime_sec, statp->st_ctime_nsec, |
765 |
statp->st_btime_sec, statp->st_btime_nsec, |
766 |
statp->st_gen, statp->st_data_version); |
767 |
break;
|
768 |
} |
769 |
default:
|
770 |
break;
|
771 |
} |
772 |
} |
773 |
va_end(ap); |
774 |
|
775 |
return offset - old_offset;
|
776 |
} |
777 |
|
778 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
779 |
{ |
780 |
int8_t id = pdu->id + 1; /* Response */ |
781 |
|
782 |
if (len < 0) { |
783 |
V9fsString str; |
784 |
int err = -len;
|
785 |
|
786 |
str.data = strerror(err); |
787 |
str.size = strlen(str.data); |
788 |
|
789 |
len = 7;
|
790 |
len += pdu_marshal(pdu, len, "s", &str);
|
791 |
if (dotu) {
|
792 |
len += pdu_marshal(pdu, len, "d", err);
|
793 |
} |
794 |
|
795 |
id = P9_RERROR; |
796 |
} |
797 |
|
798 |
/* fill out the header */
|
799 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
800 |
|
801 |
/* keep these in sync */
|
802 |
pdu->size = len; |
803 |
pdu->id = id; |
804 |
|
805 |
/* push onto queue and notify */
|
806 |
virtqueue_push(s->vq, &pdu->elem, len); |
807 |
|
808 |
/* FIXME: we should batch these completions */
|
809 |
virtio_notify(&s->vdev, s->vq); |
810 |
|
811 |
free_pdu(s, pdu); |
812 |
} |
813 |
|
814 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
815 |
{ |
816 |
mode_t ret; |
817 |
|
818 |
ret = mode & 0777;
|
819 |
if (mode & P9_STAT_MODE_DIR) {
|
820 |
ret |= S_IFDIR; |
821 |
} |
822 |
|
823 |
if (dotu) {
|
824 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
825 |
ret |= S_IFLNK; |
826 |
} |
827 |
if (mode & P9_STAT_MODE_SOCKET) {
|
828 |
ret |= S_IFSOCK; |
829 |
} |
830 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
831 |
ret |= S_IFIFO; |
832 |
} |
833 |
if (mode & P9_STAT_MODE_DEVICE) {
|
834 |
if (extension && extension->data[0] == 'c') { |
835 |
ret |= S_IFCHR; |
836 |
} else {
|
837 |
ret |= S_IFBLK; |
838 |
} |
839 |
} |
840 |
} |
841 |
|
842 |
if (!(ret&~0777)) { |
843 |
ret |= S_IFREG; |
844 |
} |
845 |
|
846 |
if (mode & P9_STAT_MODE_SETUID) {
|
847 |
ret |= S_ISUID; |
848 |
} |
849 |
if (mode & P9_STAT_MODE_SETGID) {
|
850 |
ret |= S_ISGID; |
851 |
} |
852 |
if (mode & P9_STAT_MODE_SETVTX) {
|
853 |
ret |= S_ISVTX; |
854 |
} |
855 |
|
856 |
return ret;
|
857 |
} |
858 |
|
859 |
static int donttouch_stat(V9fsStat *stat) |
860 |
{ |
861 |
if (stat->type == -1 && |
862 |
stat->dev == -1 &&
|
863 |
stat->qid.type == -1 &&
|
864 |
stat->qid.version == -1 &&
|
865 |
stat->qid.path == -1 &&
|
866 |
stat->mode == -1 &&
|
867 |
stat->atime == -1 &&
|
868 |
stat->mtime == -1 &&
|
869 |
stat->length == -1 &&
|
870 |
!stat->name.size && |
871 |
!stat->uid.size && |
872 |
!stat->gid.size && |
873 |
!stat->muid.size && |
874 |
stat->n_uid == -1 &&
|
875 |
stat->n_gid == -1 &&
|
876 |
stat->n_muid == -1) {
|
877 |
return 1; |
878 |
} |
879 |
|
880 |
return 0; |
881 |
} |
882 |
|
883 |
static void v9fs_stat_free(V9fsStat *stat) |
884 |
{ |
885 |
v9fs_string_free(&stat->name); |
886 |
v9fs_string_free(&stat->uid); |
887 |
v9fs_string_free(&stat->gid); |
888 |
v9fs_string_free(&stat->muid); |
889 |
v9fs_string_free(&stat->extension); |
890 |
} |
891 |
|
892 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
893 |
{ |
894 |
uint32_t mode; |
895 |
|
896 |
mode = stbuf->st_mode & 0777;
|
897 |
if (S_ISDIR(stbuf->st_mode)) {
|
898 |
mode |= P9_STAT_MODE_DIR; |
899 |
} |
900 |
|
901 |
if (dotu) {
|
902 |
if (S_ISLNK(stbuf->st_mode)) {
|
903 |
mode |= P9_STAT_MODE_SYMLINK; |
904 |
} |
905 |
|
906 |
if (S_ISSOCK(stbuf->st_mode)) {
|
907 |
mode |= P9_STAT_MODE_SOCKET; |
908 |
} |
909 |
|
910 |
if (S_ISFIFO(stbuf->st_mode)) {
|
911 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
912 |
} |
913 |
|
914 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
915 |
mode |= P9_STAT_MODE_DEVICE; |
916 |
} |
917 |
|
918 |
if (stbuf->st_mode & S_ISUID) {
|
919 |
mode |= P9_STAT_MODE_SETUID; |
920 |
} |
921 |
|
922 |
if (stbuf->st_mode & S_ISGID) {
|
923 |
mode |= P9_STAT_MODE_SETGID; |
924 |
} |
925 |
|
926 |
if (stbuf->st_mode & S_ISVTX) {
|
927 |
mode |= P9_STAT_MODE_SETVTX; |
928 |
} |
929 |
} |
930 |
|
931 |
return mode;
|
932 |
} |
933 |
|
934 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
935 |
const struct stat *stbuf, |
936 |
V9fsStat *v9stat) |
937 |
{ |
938 |
int err;
|
939 |
const char *str; |
940 |
|
941 |
memset(v9stat, 0, sizeof(*v9stat)); |
942 |
|
943 |
stat_to_qid(stbuf, &v9stat->qid); |
944 |
v9stat->mode = stat_to_v9mode(stbuf); |
945 |
v9stat->atime = stbuf->st_atime; |
946 |
v9stat->mtime = stbuf->st_mtime; |
947 |
v9stat->length = stbuf->st_size; |
948 |
|
949 |
v9fs_string_null(&v9stat->uid); |
950 |
v9fs_string_null(&v9stat->gid); |
951 |
v9fs_string_null(&v9stat->muid); |
952 |
|
953 |
if (dotu) {
|
954 |
v9stat->n_uid = stbuf->st_uid; |
955 |
v9stat->n_gid = stbuf->st_gid; |
956 |
v9stat->n_muid = 0;
|
957 |
|
958 |
v9fs_string_null(&v9stat->extension); |
959 |
|
960 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
961 |
err = v9fs_do_readlink(s, name, &v9stat->extension); |
962 |
if (err == -1) { |
963 |
err = -errno; |
964 |
return err;
|
965 |
} |
966 |
v9stat->extension.data[err] = 0;
|
967 |
v9stat->extension.size = err; |
968 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
969 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
970 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
971 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
972 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
973 |
v9fs_string_sprintf(&v9stat->extension, "%s %u",
|
974 |
"HARDLINKCOUNT", stbuf->st_nlink);
|
975 |
} |
976 |
} |
977 |
|
978 |
str = strrchr(name->data, '/');
|
979 |
if (str) {
|
980 |
str += 1;
|
981 |
} else {
|
982 |
str = name->data; |
983 |
} |
984 |
|
985 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
986 |
|
987 |
v9stat->size = 61 +
|
988 |
v9fs_string_size(&v9stat->name) + |
989 |
v9fs_string_size(&v9stat->uid) + |
990 |
v9fs_string_size(&v9stat->gid) + |
991 |
v9fs_string_size(&v9stat->muid) + |
992 |
v9fs_string_size(&v9stat->extension); |
993 |
return 0; |
994 |
} |
995 |
|
996 |
#define P9_STATS_MODE 0x00000001ULL |
997 |
#define P9_STATS_NLINK 0x00000002ULL |
998 |
#define P9_STATS_UID 0x00000004ULL |
999 |
#define P9_STATS_GID 0x00000008ULL |
1000 |
#define P9_STATS_RDEV 0x00000010ULL |
1001 |
#define P9_STATS_ATIME 0x00000020ULL |
1002 |
#define P9_STATS_MTIME 0x00000040ULL |
1003 |
#define P9_STATS_CTIME 0x00000080ULL |
1004 |
#define P9_STATS_INO 0x00000100ULL |
1005 |
#define P9_STATS_SIZE 0x00000200ULL |
1006 |
#define P9_STATS_BLOCKS 0x00000400ULL |
1007 |
|
1008 |
#define P9_STATS_BTIME 0x00000800ULL |
1009 |
#define P9_STATS_GEN 0x00001000ULL |
1010 |
#define P9_STATS_DATA_VERSION 0x00002000ULL |
1011 |
|
1012 |
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ |
1013 |
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ |
1014 |
|
1015 |
|
1016 |
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, |
1017 |
V9fsStatDotl *v9lstat) |
1018 |
{ |
1019 |
memset(v9lstat, 0, sizeof(*v9lstat)); |
1020 |
|
1021 |
v9lstat->st_mode = stbuf->st_mode; |
1022 |
v9lstat->st_nlink = stbuf->st_nlink; |
1023 |
v9lstat->st_uid = stbuf->st_uid; |
1024 |
v9lstat->st_gid = stbuf->st_gid; |
1025 |
v9lstat->st_rdev = stbuf->st_rdev; |
1026 |
v9lstat->st_size = stbuf->st_size; |
1027 |
v9lstat->st_blksize = stbuf->st_blksize; |
1028 |
v9lstat->st_blocks = stbuf->st_blocks; |
1029 |
v9lstat->st_atime_sec = stbuf->st_atime; |
1030 |
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; |
1031 |
v9lstat->st_mtime_sec = stbuf->st_mtime; |
1032 |
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; |
1033 |
v9lstat->st_ctime_sec = stbuf->st_ctime; |
1034 |
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; |
1035 |
/* Currently we only support BASIC fields in stat */
|
1036 |
v9lstat->st_result_mask = P9_STATS_BASIC; |
1037 |
|
1038 |
stat_to_qid(stbuf, &v9lstat->qid); |
1039 |
} |
1040 |
|
1041 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1042 |
{ |
1043 |
while (len && *iovcnt) {
|
1044 |
if (len < sg->iov_len) {
|
1045 |
sg->iov_len -= len; |
1046 |
sg->iov_base += len; |
1047 |
len = 0;
|
1048 |
} else {
|
1049 |
len -= sg->iov_len; |
1050 |
sg++; |
1051 |
*iovcnt -= 1;
|
1052 |
} |
1053 |
} |
1054 |
|
1055 |
return sg;
|
1056 |
} |
1057 |
|
1058 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
1059 |
{ |
1060 |
int i;
|
1061 |
int total = 0; |
1062 |
|
1063 |
for (i = 0; i < *cnt; i++) { |
1064 |
if ((total + sg[i].iov_len) > cap) {
|
1065 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
1066 |
i++; |
1067 |
break;
|
1068 |
} |
1069 |
total += sg[i].iov_len; |
1070 |
} |
1071 |
|
1072 |
*cnt = i; |
1073 |
|
1074 |
return sg;
|
1075 |
} |
1076 |
|
1077 |
static void print_sg(struct iovec *sg, int cnt) |
1078 |
{ |
1079 |
int i;
|
1080 |
|
1081 |
printf("sg[%d]: {", cnt);
|
1082 |
for (i = 0; i < cnt; i++) { |
1083 |
if (i) {
|
1084 |
printf(", ");
|
1085 |
} |
1086 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
1087 |
} |
1088 |
printf("}\n");
|
1089 |
} |
1090 |
|
1091 |
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1092 |
{ |
1093 |
V9fsString str; |
1094 |
v9fs_string_init(&str); |
1095 |
v9fs_string_copy(&str, dst); |
1096 |
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
1097 |
v9fs_string_free(&str); |
1098 |
} |
1099 |
|
1100 |
static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
1101 |
{ |
1102 |
V9fsString version; |
1103 |
size_t offset = 7;
|
1104 |
|
1105 |
pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
1106 |
|
1107 |
if (!strcmp(version.data, "9P2000.u")) { |
1108 |
s->proto_version = V9FS_PROTO_2000U; |
1109 |
} else if (!strcmp(version.data, "9P2000.L")) { |
1110 |
s->proto_version = V9FS_PROTO_2000L; |
1111 |
} else {
|
1112 |
v9fs_string_sprintf(&version, "unknown");
|
1113 |
} |
1114 |
|
1115 |
offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
1116 |
complete_pdu(s, pdu, offset); |
1117 |
|
1118 |
v9fs_string_free(&version); |
1119 |
} |
1120 |
|
1121 |
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) |
1122 |
{ |
1123 |
int32_t fid, afid, n_uname; |
1124 |
V9fsString uname, aname; |
1125 |
V9fsFidState *fidp; |
1126 |
V9fsQID qid; |
1127 |
size_t offset = 7;
|
1128 |
ssize_t err; |
1129 |
|
1130 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
1131 |
|
1132 |
fidp = alloc_fid(s, fid); |
1133 |
if (fidp == NULL) { |
1134 |
err = -EINVAL; |
1135 |
goto out;
|
1136 |
} |
1137 |
|
1138 |
fidp->uid = n_uname; |
1139 |
|
1140 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
1141 |
err = fid_to_qid(s, fidp, &qid); |
1142 |
if (err) {
|
1143 |
err = -EINVAL; |
1144 |
free_fid(s, fid); |
1145 |
goto out;
|
1146 |
} |
1147 |
|
1148 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
1149 |
|
1150 |
err = offset; |
1151 |
out:
|
1152 |
complete_pdu(s, pdu, err); |
1153 |
v9fs_string_free(&uname); |
1154 |
v9fs_string_free(&aname); |
1155 |
} |
1156 |
|
1157 |
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1158 |
{ |
1159 |
if (err == -1) { |
1160 |
err = -errno; |
1161 |
goto out;
|
1162 |
} |
1163 |
|
1164 |
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); |
1165 |
if (err) {
|
1166 |
goto out;
|
1167 |
} |
1168 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); |
1169 |
err = vs->offset; |
1170 |
|
1171 |
out:
|
1172 |
complete_pdu(s, vs->pdu, err); |
1173 |
v9fs_stat_free(&vs->v9stat); |
1174 |
qemu_free(vs); |
1175 |
} |
1176 |
|
1177 |
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1178 |
{ |
1179 |
int32_t fid; |
1180 |
V9fsStatState *vs; |
1181 |
ssize_t err = 0;
|
1182 |
|
1183 |
vs = qemu_malloc(sizeof(*vs));
|
1184 |
vs->pdu = pdu; |
1185 |
vs->offset = 7;
|
1186 |
|
1187 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1188 |
|
1189 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
1190 |
|
1191 |
vs->fidp = lookup_fid(s, fid); |
1192 |
if (vs->fidp == NULL) { |
1193 |
err = -ENOENT; |
1194 |
goto out;
|
1195 |
} |
1196 |
|
1197 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1198 |
v9fs_stat_post_lstat(s, vs, err); |
1199 |
return;
|
1200 |
|
1201 |
out:
|
1202 |
complete_pdu(s, vs->pdu, err); |
1203 |
v9fs_stat_free(&vs->v9stat); |
1204 |
qemu_free(vs); |
1205 |
} |
1206 |
|
1207 |
static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs, |
1208 |
int err)
|
1209 |
{ |
1210 |
if (err == -1) { |
1211 |
err = -errno; |
1212 |
goto out;
|
1213 |
} |
1214 |
|
1215 |
stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl); |
1216 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
|
1217 |
err = vs->offset; |
1218 |
|
1219 |
out:
|
1220 |
complete_pdu(s, vs->pdu, err); |
1221 |
qemu_free(vs); |
1222 |
} |
1223 |
|
1224 |
static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu) |
1225 |
{ |
1226 |
int32_t fid; |
1227 |
V9fsStatStateDotl *vs; |
1228 |
ssize_t err = 0;
|
1229 |
V9fsFidState *fidp; |
1230 |
uint64_t request_mask; |
1231 |
|
1232 |
vs = qemu_malloc(sizeof(*vs));
|
1233 |
vs->pdu = pdu; |
1234 |
vs->offset = 7;
|
1235 |
|
1236 |
memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl)); |
1237 |
|
1238 |
pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
|
1239 |
|
1240 |
fidp = lookup_fid(s, fid); |
1241 |
if (fidp == NULL) { |
1242 |
err = -ENOENT; |
1243 |
goto out;
|
1244 |
} |
1245 |
|
1246 |
/* Currently we only support BASIC fields in stat, so there is no
|
1247 |
* need to look at request_mask.
|
1248 |
*/
|
1249 |
err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf); |
1250 |
v9fs_getattr_post_lstat(s, vs, err); |
1251 |
return;
|
1252 |
|
1253 |
out:
|
1254 |
complete_pdu(s, vs->pdu, err); |
1255 |
qemu_free(vs); |
1256 |
} |
1257 |
|
1258 |
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1259 |
{ |
1260 |
complete_pdu(s, vs->pdu, err); |
1261 |
|
1262 |
if (vs->nwnames) {
|
1263 |
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1264 |
v9fs_string_free(&vs->wnames[vs->name_idx]); |
1265 |
} |
1266 |
|
1267 |
qemu_free(vs->wnames); |
1268 |
qemu_free(vs->qids); |
1269 |
} |
1270 |
} |
1271 |
|
1272 |
static void v9fs_walk_marshal(V9fsWalkState *vs) |
1273 |
{ |
1274 |
int i;
|
1275 |
vs->offset = 7;
|
1276 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
1277 |
|
1278 |
for (i = 0; i < vs->nwnames; i++) { |
1279 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
1280 |
} |
1281 |
} |
1282 |
|
1283 |
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1284 |
int err)
|
1285 |
{ |
1286 |
if (err == -1) { |
1287 |
free_fid(s, vs->newfidp->fid); |
1288 |
v9fs_string_free(&vs->path); |
1289 |
err = -ENOENT; |
1290 |
goto out;
|
1291 |
} |
1292 |
|
1293 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1294 |
|
1295 |
vs->name_idx++; |
1296 |
if (vs->name_idx < vs->nwnames) {
|
1297 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1298 |
vs->wnames[vs->name_idx].data); |
1299 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1300 |
|
1301 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1302 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1303 |
return;
|
1304 |
} |
1305 |
|
1306 |
v9fs_string_free(&vs->path); |
1307 |
v9fs_walk_marshal(vs); |
1308 |
err = vs->offset; |
1309 |
out:
|
1310 |
v9fs_walk_complete(s, vs, err); |
1311 |
} |
1312 |
|
1313 |
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1314 |
int err)
|
1315 |
{ |
1316 |
if (err == -1) { |
1317 |
v9fs_string_free(&vs->path); |
1318 |
err = -ENOENT; |
1319 |
goto out;
|
1320 |
} |
1321 |
|
1322 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1323 |
vs->name_idx++; |
1324 |
if (vs->name_idx < vs->nwnames) {
|
1325 |
|
1326 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1327 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1328 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1329 |
|
1330 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1331 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1332 |
return;
|
1333 |
} |
1334 |
|
1335 |
v9fs_string_free(&vs->path); |
1336 |
v9fs_walk_marshal(vs); |
1337 |
err = vs->offset; |
1338 |
out:
|
1339 |
v9fs_walk_complete(s, vs, err); |
1340 |
} |
1341 |
|
1342 |
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1343 |
{ |
1344 |
int32_t fid, newfid; |
1345 |
V9fsWalkState *vs; |
1346 |
int err = 0; |
1347 |
int i;
|
1348 |
|
1349 |
vs = qemu_malloc(sizeof(*vs));
|
1350 |
vs->pdu = pdu; |
1351 |
vs->wnames = NULL;
|
1352 |
vs->qids = NULL;
|
1353 |
vs->offset = 7;
|
1354 |
|
1355 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
1356 |
&newfid, &vs->nwnames); |
1357 |
|
1358 |
if (vs->nwnames) {
|
1359 |
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
1360 |
|
1361 |
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); |
1362 |
|
1363 |
for (i = 0; i < vs->nwnames; i++) { |
1364 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
1365 |
&vs->wnames[i]); |
1366 |
} |
1367 |
} |
1368 |
|
1369 |
vs->fidp = lookup_fid(s, fid); |
1370 |
if (vs->fidp == NULL) { |
1371 |
err = -ENOENT; |
1372 |
goto out;
|
1373 |
} |
1374 |
|
1375 |
/* FIXME: is this really valid? */
|
1376 |
if (fid == newfid) {
|
1377 |
|
1378 |
BUG_ON(vs->fidp->fd != -1);
|
1379 |
BUG_ON(vs->fidp->dir); |
1380 |
v9fs_string_init(&vs->path); |
1381 |
vs->name_idx = 0;
|
1382 |
|
1383 |
if (vs->name_idx < vs->nwnames) {
|
1384 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1385 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1386 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1387 |
|
1388 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1389 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1390 |
return;
|
1391 |
} |
1392 |
} else {
|
1393 |
vs->newfidp = alloc_fid(s, newfid); |
1394 |
if (vs->newfidp == NULL) { |
1395 |
err = -EINVAL; |
1396 |
goto out;
|
1397 |
} |
1398 |
|
1399 |
vs->newfidp->uid = vs->fidp->uid; |
1400 |
v9fs_string_init(&vs->path); |
1401 |
vs->name_idx = 0;
|
1402 |
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); |
1403 |
|
1404 |
if (vs->name_idx < vs->nwnames) {
|
1405 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1406 |
vs->wnames[vs->name_idx].data); |
1407 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1408 |
|
1409 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1410 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1411 |
return;
|
1412 |
} |
1413 |
} |
1414 |
|
1415 |
v9fs_walk_marshal(vs); |
1416 |
err = vs->offset; |
1417 |
out:
|
1418 |
v9fs_walk_complete(s, vs, err); |
1419 |
} |
1420 |
|
1421 |
static int32_t get_iounit(V9fsState *s, V9fsString *name)
|
1422 |
{ |
1423 |
struct statfs stbuf;
|
1424 |
int32_t iounit = 0;
|
1425 |
|
1426 |
/*
|
1427 |
* iounit should be multiples of f_bsize (host filesystem block size
|
1428 |
* and as well as less than (client msize - P9_IOHDRSZ))
|
1429 |
*/
|
1430 |
if (!v9fs_do_statfs(s, name, &stbuf)) {
|
1431 |
iounit = stbuf.f_bsize; |
1432 |
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; |
1433 |
} |
1434 |
|
1435 |
if (!iounit) {
|
1436 |
iounit = s->msize - P9_IOHDRSZ; |
1437 |
} |
1438 |
return iounit;
|
1439 |
} |
1440 |
|
1441 |
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1442 |
{ |
1443 |
if (vs->fidp->dir == NULL) { |
1444 |
err = -errno; |
1445 |
goto out;
|
1446 |
} |
1447 |
|
1448 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1449 |
err = vs->offset; |
1450 |
out:
|
1451 |
complete_pdu(s, vs->pdu, err); |
1452 |
qemu_free(vs); |
1453 |
|
1454 |
} |
1455 |
|
1456 |
static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1457 |
{ |
1458 |
int err;
|
1459 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
1460 |
err = vs->offset; |
1461 |
complete_pdu(s, vs->pdu, err); |
1462 |
qemu_free(vs); |
1463 |
} |
1464 |
|
1465 |
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1466 |
{ |
1467 |
if (vs->fidp->fd == -1) { |
1468 |
err = -errno; |
1469 |
goto out;
|
1470 |
} |
1471 |
|
1472 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
1473 |
v9fs_open_post_getiounit(s, vs); |
1474 |
return;
|
1475 |
out:
|
1476 |
complete_pdu(s, vs->pdu, err); |
1477 |
qemu_free(vs); |
1478 |
} |
1479 |
|
1480 |
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) |
1481 |
{ |
1482 |
if (err) {
|
1483 |
err = -errno; |
1484 |
goto out;
|
1485 |
} |
1486 |
|
1487 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1488 |
|
1489 |
if (S_ISDIR(vs->stbuf.st_mode)) {
|
1490 |
vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path); |
1491 |
v9fs_open_post_opendir(s, vs, err); |
1492 |
} else {
|
1493 |
vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path, |
1494 |
omode_to_uflags(vs->mode)); |
1495 |
v9fs_open_post_open(s, vs, err); |
1496 |
} |
1497 |
return;
|
1498 |
out:
|
1499 |
complete_pdu(s, vs->pdu, err); |
1500 |
qemu_free(vs); |
1501 |
} |
1502 |
|
1503 |
static void v9fs_open(V9fsState *s, V9fsPDU *pdu) |
1504 |
{ |
1505 |
int32_t fid; |
1506 |
V9fsOpenState *vs; |
1507 |
ssize_t err = 0;
|
1508 |
|
1509 |
|
1510 |
vs = qemu_malloc(sizeof(*vs));
|
1511 |
vs->pdu = pdu; |
1512 |
vs->offset = 7;
|
1513 |
|
1514 |
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
1515 |
|
1516 |
vs->fidp = lookup_fid(s, fid); |
1517 |
if (vs->fidp == NULL) { |
1518 |
err = -ENOENT; |
1519 |
goto out;
|
1520 |
} |
1521 |
|
1522 |
BUG_ON(vs->fidp->fd != -1);
|
1523 |
BUG_ON(vs->fidp->dir); |
1524 |
|
1525 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1526 |
|
1527 |
v9fs_open_post_lstat(s, vs, err); |
1528 |
return;
|
1529 |
out:
|
1530 |
complete_pdu(s, pdu, err); |
1531 |
qemu_free(vs); |
1532 |
} |
1533 |
|
1534 |
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
1535 |
{ |
1536 |
int32_t fid; |
1537 |
size_t offset = 7;
|
1538 |
int err;
|
1539 |
|
1540 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1541 |
|
1542 |
err = free_fid(s, fid); |
1543 |
if (err < 0) { |
1544 |
goto out;
|
1545 |
} |
1546 |
|
1547 |
offset = 7;
|
1548 |
err = offset; |
1549 |
out:
|
1550 |
complete_pdu(s, pdu, err); |
1551 |
} |
1552 |
|
1553 |
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1554 |
|
1555 |
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1556 |
{ |
1557 |
if (err) {
|
1558 |
goto out;
|
1559 |
} |
1560 |
v9fs_stat_free(&vs->v9stat); |
1561 |
v9fs_string_free(&vs->name); |
1562 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1563 |
vs->offset += vs->count; |
1564 |
err = vs->offset; |
1565 |
out:
|
1566 |
complete_pdu(s, vs->pdu, err); |
1567 |
qemu_free(vs); |
1568 |
return;
|
1569 |
} |
1570 |
|
1571 |
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, |
1572 |
ssize_t err) |
1573 |
{ |
1574 |
if (err) {
|
1575 |
err = -errno; |
1576 |
goto out;
|
1577 |
} |
1578 |
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); |
1579 |
if (err) {
|
1580 |
goto out;
|
1581 |
} |
1582 |
|
1583 |
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", |
1584 |
&vs->v9stat); |
1585 |
if ((vs->len != (vs->v9stat.size + 2)) || |
1586 |
((vs->count + vs->len) > vs->max_count)) { |
1587 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); |
1588 |
v9fs_read_post_seekdir(s, vs, err); |
1589 |
return;
|
1590 |
} |
1591 |
vs->count += vs->len; |
1592 |
v9fs_stat_free(&vs->v9stat); |
1593 |
v9fs_string_free(&vs->name); |
1594 |
vs->dir_pos = vs->dent->d_off; |
1595 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
1596 |
v9fs_read_post_readdir(s, vs, err); |
1597 |
return;
|
1598 |
out:
|
1599 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); |
1600 |
v9fs_read_post_seekdir(s, vs, err); |
1601 |
return;
|
1602 |
|
1603 |
} |
1604 |
|
1605 |
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1606 |
{ |
1607 |
if (vs->dent) {
|
1608 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1609 |
v9fs_string_init(&vs->name); |
1610 |
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
1611 |
vs->dent->d_name); |
1612 |
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); |
1613 |
v9fs_read_post_dir_lstat(s, vs, err); |
1614 |
return;
|
1615 |
} |
1616 |
|
1617 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1618 |
vs->offset += vs->count; |
1619 |
err = vs->offset; |
1620 |
complete_pdu(s, vs->pdu, err); |
1621 |
qemu_free(vs); |
1622 |
return;
|
1623 |
} |
1624 |
|
1625 |
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1626 |
{ |
1627 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
1628 |
v9fs_read_post_readdir(s, vs, err); |
1629 |
return;
|
1630 |
} |
1631 |
|
1632 |
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, |
1633 |
ssize_t err) |
1634 |
{ |
1635 |
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir); |
1636 |
v9fs_read_post_telldir(s, vs, err); |
1637 |
return;
|
1638 |
} |
1639 |
|
1640 |
static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1641 |
{ |
1642 |
if (err < 0) { |
1643 |
/* IO error return the error */
|
1644 |
err = -errno; |
1645 |
goto out;
|
1646 |
} |
1647 |
vs->total += vs->len; |
1648 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
1649 |
if (vs->total < vs->count && vs->len > 0) { |
1650 |
do {
|
1651 |
if (0) { |
1652 |
print_sg(vs->sg, vs->cnt); |
1653 |
} |
1654 |
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); |
1655 |
} while (vs->len == -1 && errno == EINTR); |
1656 |
if (vs->len == -1) { |
1657 |
err = -errno; |
1658 |
} |
1659 |
v9fs_read_post_readv(s, vs, err); |
1660 |
return;
|
1661 |
} |
1662 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
1663 |
vs->offset += vs->count; |
1664 |
err = vs->offset; |
1665 |
|
1666 |
out:
|
1667 |
complete_pdu(s, vs->pdu, err); |
1668 |
qemu_free(vs); |
1669 |
} |
1670 |
|
1671 |
static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1672 |
{ |
1673 |
if (err == -1) { |
1674 |
err = -errno; |
1675 |
goto out;
|
1676 |
} |
1677 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1678 |
|
1679 |
if (vs->total < vs->count) {
|
1680 |
do {
|
1681 |
if (0) { |
1682 |
print_sg(vs->sg, vs->cnt); |
1683 |
} |
1684 |
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); |
1685 |
} while (vs->len == -1 && errno == EINTR); |
1686 |
if (vs->len == -1) { |
1687 |
err = -errno; |
1688 |
} |
1689 |
v9fs_read_post_readv(s, vs, err); |
1690 |
return;
|
1691 |
} |
1692 |
out:
|
1693 |
complete_pdu(s, vs->pdu, err); |
1694 |
qemu_free(vs); |
1695 |
} |
1696 |
|
1697 |
static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
1698 |
{ |
1699 |
int32_t fid; |
1700 |
V9fsReadState *vs; |
1701 |
ssize_t err = 0;
|
1702 |
|
1703 |
vs = qemu_malloc(sizeof(*vs));
|
1704 |
vs->pdu = pdu; |
1705 |
vs->offset = 7;
|
1706 |
vs->total = 0;
|
1707 |
vs->len = 0;
|
1708 |
vs->count = 0;
|
1709 |
|
1710 |
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
1711 |
|
1712 |
vs->fidp = lookup_fid(s, fid); |
1713 |
if (vs->fidp == NULL) { |
1714 |
err = -EINVAL; |
1715 |
goto out;
|
1716 |
} |
1717 |
|
1718 |
if (vs->fidp->dir) {
|
1719 |
vs->max_count = vs->count; |
1720 |
vs->count = 0;
|
1721 |
if (vs->off == 0) { |
1722 |
v9fs_do_rewinddir(s, vs->fidp->dir); |
1723 |
} |
1724 |
v9fs_read_post_rewinddir(s, vs, err); |
1725 |
return;
|
1726 |
} else if (vs->fidp->fd != -1) { |
1727 |
vs->sg = vs->iov; |
1728 |
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); |
1729 |
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); |
1730 |
v9fs_read_post_lseek(s, vs, err); |
1731 |
return;
|
1732 |
} else {
|
1733 |
err = -EINVAL; |
1734 |
} |
1735 |
out:
|
1736 |
complete_pdu(s, pdu, err); |
1737 |
qemu_free(vs); |
1738 |
} |
1739 |
|
1740 |
typedef struct V9fsReadDirState { |
1741 |
V9fsPDU *pdu; |
1742 |
V9fsFidState *fidp; |
1743 |
V9fsQID qid; |
1744 |
off_t saved_dir_pos; |
1745 |
struct dirent *dent;
|
1746 |
int32_t count; |
1747 |
int32_t max_count; |
1748 |
size_t offset; |
1749 |
int64_t initial_offset; |
1750 |
V9fsString name; |
1751 |
} V9fsReadDirState; |
1752 |
|
1753 |
static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs) |
1754 |
{ |
1755 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1756 |
vs->offset += vs->count; |
1757 |
complete_pdu(s, vs->pdu, vs->offset); |
1758 |
qemu_free(vs); |
1759 |
return;
|
1760 |
} |
1761 |
|
1762 |
/* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
1763 |
* size of type (1) + size of name.size (2) + strlen(name.data)
|
1764 |
*/
|
1765 |
#define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data)) |
1766 |
|
1767 |
static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs) |
1768 |
{ |
1769 |
int len;
|
1770 |
size_t size; |
1771 |
|
1772 |
if (vs->dent) {
|
1773 |
v9fs_string_init(&vs->name); |
1774 |
v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name);
|
1775 |
|
1776 |
if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
|
1777 |
/* Ran out of buffer. Set dir back to old position and return */
|
1778 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->saved_dir_pos); |
1779 |
v9fs_readdir_post_seekdir(s, vs); |
1780 |
return;
|
1781 |
} |
1782 |
|
1783 |
/* Fill up just the path field of qid because the client uses
|
1784 |
* only that. To fill the entire qid structure we will have
|
1785 |
* to stat each dirent found, which is expensive
|
1786 |
*/
|
1787 |
size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path)); |
1788 |
memcpy(&vs->qid.path, &vs->dent->d_ino, size); |
1789 |
/* Fill the other fields with dummy values */
|
1790 |
vs->qid.type = 0;
|
1791 |
vs->qid.version = 0;
|
1792 |
|
1793 |
len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs", |
1794 |
&vs->qid, vs->dent->d_off, |
1795 |
vs->dent->d_type, &vs->name); |
1796 |
vs->count += len; |
1797 |
v9fs_string_free(&vs->name); |
1798 |
vs->saved_dir_pos = vs->dent->d_off; |
1799 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
1800 |
v9fs_readdir_post_readdir(s, vs); |
1801 |
return;
|
1802 |
} |
1803 |
|
1804 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1805 |
vs->offset += vs->count; |
1806 |
complete_pdu(s, vs->pdu, vs->offset); |
1807 |
qemu_free(vs); |
1808 |
return;
|
1809 |
} |
1810 |
|
1811 |
static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs) |
1812 |
{ |
1813 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
1814 |
v9fs_readdir_post_readdir(s, vs); |
1815 |
return;
|
1816 |
} |
1817 |
|
1818 |
static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs) |
1819 |
{ |
1820 |
vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->dir); |
1821 |
v9fs_readdir_post_telldir(s, vs); |
1822 |
return;
|
1823 |
} |
1824 |
|
1825 |
static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu) |
1826 |
{ |
1827 |
int32_t fid; |
1828 |
V9fsReadDirState *vs; |
1829 |
ssize_t err = 0;
|
1830 |
size_t offset = 7;
|
1831 |
|
1832 |
vs = qemu_malloc(sizeof(*vs));
|
1833 |
vs->pdu = pdu; |
1834 |
vs->offset = 7;
|
1835 |
vs->count = 0;
|
1836 |
|
1837 |
pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset,
|
1838 |
&vs->max_count); |
1839 |
|
1840 |
vs->fidp = lookup_fid(s, fid); |
1841 |
if (vs->fidp == NULL || !(vs->fidp->dir)) { |
1842 |
err = -EINVAL; |
1843 |
goto out;
|
1844 |
} |
1845 |
|
1846 |
if (vs->initial_offset == 0) { |
1847 |
v9fs_do_rewinddir(s, vs->fidp->dir); |
1848 |
} else {
|
1849 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->initial_offset); |
1850 |
} |
1851 |
|
1852 |
v9fs_readdir_post_setdir(s, vs); |
1853 |
return;
|
1854 |
|
1855 |
out:
|
1856 |
complete_pdu(s, pdu, err); |
1857 |
qemu_free(vs); |
1858 |
return;
|
1859 |
} |
1860 |
|
1861 |
static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, |
1862 |
ssize_t err) |
1863 |
{ |
1864 |
if (err < 0) { |
1865 |
/* IO error return the error */
|
1866 |
err = -errno; |
1867 |
goto out;
|
1868 |
} |
1869 |
vs->total += vs->len; |
1870 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
1871 |
if (vs->total < vs->count && vs->len > 0) { |
1872 |
do {
|
1873 |
if (0) { |
1874 |
print_sg(vs->sg, vs->cnt); |
1875 |
} |
1876 |
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); |
1877 |
} while (vs->len == -1 && errno == EINTR); |
1878 |
if (vs->len == -1) { |
1879 |
err = -errno; |
1880 |
} |
1881 |
v9fs_write_post_writev(s, vs, err); |
1882 |
return;
|
1883 |
} |
1884 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
1885 |
|
1886 |
err = vs->offset; |
1887 |
out:
|
1888 |
complete_pdu(s, vs->pdu, err); |
1889 |
qemu_free(vs); |
1890 |
} |
1891 |
|
1892 |
static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) |
1893 |
{ |
1894 |
if (err == -1) { |
1895 |
err = -errno; |
1896 |
goto out;
|
1897 |
} |
1898 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1899 |
|
1900 |
if (vs->total < vs->count) {
|
1901 |
do {
|
1902 |
if (0) { |
1903 |
print_sg(vs->sg, vs->cnt); |
1904 |
} |
1905 |
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); |
1906 |
} while (vs->len == -1 && errno == EINTR); |
1907 |
if (vs->len == -1) { |
1908 |
err = -errno; |
1909 |
} |
1910 |
v9fs_write_post_writev(s, vs, err); |
1911 |
return;
|
1912 |
} |
1913 |
|
1914 |
out:
|
1915 |
complete_pdu(s, vs->pdu, err); |
1916 |
qemu_free(vs); |
1917 |
} |
1918 |
|
1919 |
static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
1920 |
{ |
1921 |
int32_t fid; |
1922 |
V9fsWriteState *vs; |
1923 |
ssize_t err; |
1924 |
|
1925 |
vs = qemu_malloc(sizeof(*vs));
|
1926 |
|
1927 |
vs->pdu = pdu; |
1928 |
vs->offset = 7;
|
1929 |
vs->sg = vs->iov; |
1930 |
vs->total = 0;
|
1931 |
vs->len = 0;
|
1932 |
|
1933 |
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
1934 |
vs->sg, &vs->cnt); |
1935 |
|
1936 |
vs->fidp = lookup_fid(s, fid); |
1937 |
if (vs->fidp == NULL) { |
1938 |
err = -EINVAL; |
1939 |
goto out;
|
1940 |
} |
1941 |
|
1942 |
if (vs->fidp->fd == -1) { |
1943 |
err = -EINVAL; |
1944 |
goto out;
|
1945 |
} |
1946 |
|
1947 |
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); |
1948 |
|
1949 |
v9fs_write_post_lseek(s, vs, err); |
1950 |
return;
|
1951 |
|
1952 |
out:
|
1953 |
complete_pdu(s, vs->pdu, err); |
1954 |
qemu_free(vs); |
1955 |
} |
1956 |
|
1957 |
static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
1958 |
{ |
1959 |
int err;
|
1960 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
1961 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1962 |
|
1963 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
1964 |
err = vs->offset; |
1965 |
|
1966 |
complete_pdu(s, vs->pdu, err); |
1967 |
v9fs_string_free(&vs->name); |
1968 |
v9fs_string_free(&vs->extension); |
1969 |
v9fs_string_free(&vs->fullname); |
1970 |
qemu_free(vs); |
1971 |
} |
1972 |
|
1973 |
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
1974 |
{ |
1975 |
if (err == 0) { |
1976 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
1977 |
v9fs_create_post_getiounit(s, vs); |
1978 |
return;
|
1979 |
} |
1980 |
|
1981 |
complete_pdu(s, vs->pdu, err); |
1982 |
v9fs_string_free(&vs->name); |
1983 |
v9fs_string_free(&vs->extension); |
1984 |
v9fs_string_free(&vs->fullname); |
1985 |
qemu_free(vs); |
1986 |
} |
1987 |
|
1988 |
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) |
1989 |
{ |
1990 |
if (err) {
|
1991 |
err = -errno; |
1992 |
} |
1993 |
v9fs_post_create(s, vs, err); |
1994 |
} |
1995 |
|
1996 |
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, |
1997 |
int err)
|
1998 |
{ |
1999 |
if (!vs->fidp->dir) {
|
2000 |
err = -errno; |
2001 |
} |
2002 |
v9fs_post_create(s, vs, err); |
2003 |
} |
2004 |
|
2005 |
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, |
2006 |
int err)
|
2007 |
{ |
2008 |
if (err) {
|
2009 |
err = -errno; |
2010 |
goto out;
|
2011 |
} |
2012 |
|
2013 |
vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname); |
2014 |
v9fs_create_post_opendir(s, vs, err); |
2015 |
return;
|
2016 |
|
2017 |
out:
|
2018 |
v9fs_post_create(s, vs, err); |
2019 |
} |
2020 |
|
2021 |
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) |
2022 |
{ |
2023 |
if (err) {
|
2024 |
err = -errno; |
2025 |
goto out;
|
2026 |
} |
2027 |
|
2028 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2029 |
v9fs_create_post_dir_lstat(s, vs, err); |
2030 |
return;
|
2031 |
|
2032 |
out:
|
2033 |
v9fs_post_create(s, vs, err); |
2034 |
} |
2035 |
|
2036 |
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2037 |
{ |
2038 |
if (err) {
|
2039 |
vs->fidp->fd = -1;
|
2040 |
err = -errno; |
2041 |
} |
2042 |
|
2043 |
v9fs_post_create(s, vs, err); |
2044 |
return;
|
2045 |
} |
2046 |
|
2047 |
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) |
2048 |
{ |
2049 |
if (vs->fidp->fd == -1) { |
2050 |
err = -errno; |
2051 |
goto out;
|
2052 |
} |
2053 |
|
2054 |
err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf); |
2055 |
v9fs_create_post_fstat(s, vs, err); |
2056 |
|
2057 |
return;
|
2058 |
|
2059 |
out:
|
2060 |
v9fs_post_create(s, vs, err); |
2061 |
|
2062 |
} |
2063 |
|
2064 |
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) |
2065 |
{ |
2066 |
|
2067 |
if (err == 0 || errno != ENOENT) { |
2068 |
err = -errno; |
2069 |
goto out;
|
2070 |
} |
2071 |
|
2072 |
if (vs->perm & P9_STAT_MODE_DIR) {
|
2073 |
err = v9fs_do_mkdir(s, vs); |
2074 |
v9fs_create_post_mkdir(s, vs, err); |
2075 |
} else if (vs->perm & P9_STAT_MODE_SYMLINK) { |
2076 |
err = v9fs_do_symlink(s, vs); |
2077 |
v9fs_create_post_perms(s, vs, err); |
2078 |
} else if (vs->perm & P9_STAT_MODE_LINK) { |
2079 |
int32_t nfid = atoi(vs->extension.data); |
2080 |
V9fsFidState *nfidp = lookup_fid(s, nfid); |
2081 |
if (nfidp == NULL) { |
2082 |
err = -errno; |
2083 |
v9fs_post_create(s, vs, err); |
2084 |
} |
2085 |
err = v9fs_do_link(s, &nfidp->path, &vs->fullname); |
2086 |
v9fs_create_post_perms(s, vs, err); |
2087 |
} else if (vs->perm & P9_STAT_MODE_DEVICE) { |
2088 |
char ctype;
|
2089 |
uint32_t major, minor; |
2090 |
mode_t nmode = 0;
|
2091 |
|
2092 |
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, |
2093 |
&minor) != 3) {
|
2094 |
err = -errno; |
2095 |
v9fs_post_create(s, vs, err); |
2096 |
} |
2097 |
|
2098 |
switch (ctype) {
|
2099 |
case 'c': |
2100 |
nmode = S_IFCHR; |
2101 |
break;
|
2102 |
case 'b': |
2103 |
nmode = S_IFBLK; |
2104 |
break;
|
2105 |
default:
|
2106 |
err = -EIO; |
2107 |
v9fs_post_create(s, vs, err); |
2108 |
} |
2109 |
|
2110 |
nmode |= vs->perm & 0777;
|
2111 |
err = v9fs_do_mknod(s, vs, nmode, makedev(major, minor)); |
2112 |
v9fs_create_post_perms(s, vs, err); |
2113 |
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { |
2114 |
err = v9fs_do_mknod(s, vs, S_IFIFO | (vs->perm & 0777), 0); |
2115 |
v9fs_post_create(s, vs, err); |
2116 |
} else if (vs->perm & P9_STAT_MODE_SOCKET) { |
2117 |
err = v9fs_do_mknod(s, vs, S_IFSOCK | (vs->perm & 0777), 0); |
2118 |
v9fs_post_create(s, vs, err); |
2119 |
} else {
|
2120 |
vs->fidp->fd = v9fs_do_open2(s, vs); |
2121 |
v9fs_create_post_open2(s, vs, err); |
2122 |
} |
2123 |
|
2124 |
return;
|
2125 |
|
2126 |
out:
|
2127 |
v9fs_post_create(s, vs, err); |
2128 |
} |
2129 |
|
2130 |
static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
2131 |
{ |
2132 |
int32_t fid; |
2133 |
V9fsCreateState *vs; |
2134 |
int err = 0; |
2135 |
|
2136 |
vs = qemu_malloc(sizeof(*vs));
|
2137 |
vs->pdu = pdu; |
2138 |
vs->offset = 7;
|
2139 |
|
2140 |
v9fs_string_init(&vs->fullname); |
2141 |
|
2142 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
2143 |
&vs->perm, &vs->mode, &vs->extension); |
2144 |
|
2145 |
vs->fidp = lookup_fid(s, fid); |
2146 |
if (vs->fidp == NULL) { |
2147 |
err = -EINVAL; |
2148 |
goto out;
|
2149 |
} |
2150 |
|
2151 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
2152 |
vs->name.data); |
2153 |
|
2154 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2155 |
v9fs_create_post_lstat(s, vs, err); |
2156 |
return;
|
2157 |
|
2158 |
out:
|
2159 |
complete_pdu(s, vs->pdu, err); |
2160 |
v9fs_string_free(&vs->name); |
2161 |
v9fs_string_free(&vs->extension); |
2162 |
qemu_free(vs); |
2163 |
} |
2164 |
|
2165 |
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
2166 |
{ |
2167 |
/* A nop call with no return */
|
2168 |
complete_pdu(s, pdu, 7);
|
2169 |
} |
2170 |
|
2171 |
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
2172 |
int err)
|
2173 |
{ |
2174 |
if (err < 0) { |
2175 |
err = -errno; |
2176 |
} else {
|
2177 |
err = vs->offset; |
2178 |
} |
2179 |
|
2180 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
2181 |
free_fid(s, vs->fidp->fid); |
2182 |
|
2183 |
complete_pdu(s, vs->pdu, err); |
2184 |
qemu_free(vs); |
2185 |
} |
2186 |
|
2187 |
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
2188 |
{ |
2189 |
int32_t fid; |
2190 |
V9fsRemoveState *vs; |
2191 |
int err = 0; |
2192 |
|
2193 |
vs = qemu_malloc(sizeof(*vs));
|
2194 |
vs->pdu = pdu; |
2195 |
vs->offset = 7;
|
2196 |
|
2197 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
2198 |
|
2199 |
vs->fidp = lookup_fid(s, fid); |
2200 |
if (vs->fidp == NULL) { |
2201 |
err = -EINVAL; |
2202 |
goto out;
|
2203 |
} |
2204 |
|
2205 |
err = v9fs_do_remove(s, &vs->fidp->path); |
2206 |
v9fs_remove_post_remove(s, vs, err); |
2207 |
return;
|
2208 |
|
2209 |
out:
|
2210 |
complete_pdu(s, pdu, err); |
2211 |
qemu_free(vs); |
2212 |
} |
2213 |
|
2214 |
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2215 |
{ |
2216 |
if (err < 0) { |
2217 |
goto out;
|
2218 |
} |
2219 |
|
2220 |
err = vs->offset; |
2221 |
|
2222 |
out:
|
2223 |
v9fs_stat_free(&vs->v9stat); |
2224 |
complete_pdu(s, vs->pdu, err); |
2225 |
qemu_free(vs); |
2226 |
} |
2227 |
|
2228 |
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) |
2229 |
{ |
2230 |
if (err < 0) { |
2231 |
goto out;
|
2232 |
} |
2233 |
|
2234 |
if (vs->v9stat.name.size != 0) { |
2235 |
v9fs_string_free(&vs->nname); |
2236 |
} |
2237 |
|
2238 |
if (vs->v9stat.length != -1) { |
2239 |
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { |
2240 |
err = -errno; |
2241 |
} |
2242 |
} |
2243 |
v9fs_wstat_post_truncate(s, vs, err); |
2244 |
return;
|
2245 |
|
2246 |
out:
|
2247 |
v9fs_stat_free(&vs->v9stat); |
2248 |
complete_pdu(s, vs->pdu, err); |
2249 |
qemu_free(vs); |
2250 |
} |
2251 |
|
2252 |
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
2253 |
{ |
2254 |
V9fsFidState *fidp; |
2255 |
if (err < 0) { |
2256 |
goto out;
|
2257 |
} |
2258 |
|
2259 |
if (vs->v9stat.name.size != 0) { |
2260 |
char *old_name, *new_name;
|
2261 |
char *end;
|
2262 |
|
2263 |
old_name = vs->fidp->path.data; |
2264 |
end = strrchr(old_name, '/');
|
2265 |
if (end) {
|
2266 |
end++; |
2267 |
} else {
|
2268 |
end = old_name; |
2269 |
} |
2270 |
|
2271 |
new_name = qemu_mallocz(end - old_name + vs->v9stat.name.size + 1);
|
2272 |
|
2273 |
memcpy(new_name, old_name, end - old_name); |
2274 |
memcpy(new_name + (end - old_name), vs->v9stat.name.data, |
2275 |
vs->v9stat.name.size); |
2276 |
vs->nname.data = new_name; |
2277 |
vs->nname.size = strlen(new_name); |
2278 |
|
2279 |
if (strcmp(new_name, vs->fidp->path.data) != 0) { |
2280 |
if (v9fs_do_rename(s, &vs->fidp->path, &vs->nname)) {
|
2281 |
err = -errno; |
2282 |
} else {
|
2283 |
/*
|
2284 |
* Fixup fid's pointing to the old name to
|
2285 |
* start pointing to the new name
|
2286 |
*/
|
2287 |
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
2288 |
|
2289 |
if (vs->fidp == fidp) {
|
2290 |
/*
|
2291 |
* we replace name of this fid towards the end
|
2292 |
* so that our below strcmp will work
|
2293 |
*/
|
2294 |
continue;
|
2295 |
} |
2296 |
if (!strncmp(vs->fidp->path.data, fidp->path.data,
|
2297 |
strlen(vs->fidp->path.data))) { |
2298 |
/* replace the name */
|
2299 |
v9fs_fix_path(&fidp->path, &vs->nname, |
2300 |
strlen(vs->fidp->path.data)); |
2301 |
} |
2302 |
} |
2303 |
v9fs_string_copy(&vs->fidp->path, &vs->nname); |
2304 |
} |
2305 |
} |
2306 |
} |
2307 |
v9fs_wstat_post_rename(s, vs, err); |
2308 |
return;
|
2309 |
|
2310 |
out:
|
2311 |
v9fs_stat_free(&vs->v9stat); |
2312 |
complete_pdu(s, vs->pdu, err); |
2313 |
qemu_free(vs); |
2314 |
} |
2315 |
|
2316 |
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2317 |
{ |
2318 |
if (err < 0) { |
2319 |
goto out;
|
2320 |
} |
2321 |
|
2322 |
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
2323 |
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
2324 |
vs->v9stat.n_gid)) { |
2325 |
err = -errno; |
2326 |
} |
2327 |
} |
2328 |
v9fs_wstat_post_chown(s, vs, err); |
2329 |
return;
|
2330 |
|
2331 |
out:
|
2332 |
v9fs_stat_free(&vs->v9stat); |
2333 |
complete_pdu(s, vs->pdu, err); |
2334 |
qemu_free(vs); |
2335 |
} |
2336 |
|
2337 |
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) |
2338 |
{ |
2339 |
if (err < 0) { |
2340 |
goto out;
|
2341 |
} |
2342 |
|
2343 |
if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
2344 |
if (v9fs_do_utimensat(s, &vs->fidp->path, vs->v9stat)) {
|
2345 |
err = -errno; |
2346 |
} |
2347 |
} |
2348 |
|
2349 |
v9fs_wstat_post_utime(s, vs, err); |
2350 |
return;
|
2351 |
|
2352 |
out:
|
2353 |
v9fs_stat_free(&vs->v9stat); |
2354 |
complete_pdu(s, vs->pdu, err); |
2355 |
qemu_free(vs); |
2356 |
} |
2357 |
|
2358 |
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) |
2359 |
{ |
2360 |
if (err == -1) { |
2361 |
err = -errno; |
2362 |
} |
2363 |
v9fs_stat_free(&vs->v9stat); |
2364 |
complete_pdu(s, vs->pdu, err); |
2365 |
qemu_free(vs); |
2366 |
} |
2367 |
|
2368 |
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) |
2369 |
{ |
2370 |
uint32_t v9_mode; |
2371 |
|
2372 |
if (err == -1) { |
2373 |
err = -errno; |
2374 |
goto out;
|
2375 |
} |
2376 |
|
2377 |
v9_mode = stat_to_v9mode(&vs->stbuf); |
2378 |
|
2379 |
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
2380 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) { |
2381 |
/* Attempting to change the type */
|
2382 |
err = -EIO; |
2383 |
goto out;
|
2384 |
} |
2385 |
|
2386 |
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
2387 |
&vs->v9stat.extension))) { |
2388 |
err = -errno; |
2389 |
} |
2390 |
v9fs_wstat_post_chmod(s, vs, err); |
2391 |
return;
|
2392 |
|
2393 |
out:
|
2394 |
v9fs_stat_free(&vs->v9stat); |
2395 |
complete_pdu(s, vs->pdu, err); |
2396 |
qemu_free(vs); |
2397 |
} |
2398 |
|
2399 |
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
2400 |
{ |
2401 |
int32_t fid; |
2402 |
V9fsWstatState *vs; |
2403 |
int err = 0; |
2404 |
|
2405 |
vs = qemu_malloc(sizeof(*vs));
|
2406 |
vs->pdu = pdu; |
2407 |
vs->offset = 7;
|
2408 |
|
2409 |
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
2410 |
|
2411 |
vs->fidp = lookup_fid(s, fid); |
2412 |
if (vs->fidp == NULL) { |
2413 |
err = -EINVAL; |
2414 |
goto out;
|
2415 |
} |
2416 |
|
2417 |
/* do we need to sync the file? */
|
2418 |
if (donttouch_stat(&vs->v9stat)) {
|
2419 |
err = v9fs_do_fsync(s, vs->fidp->fd); |
2420 |
v9fs_wstat_post_fsync(s, vs, err); |
2421 |
return;
|
2422 |
} |
2423 |
|
2424 |
if (vs->v9stat.mode != -1) { |
2425 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
2426 |
v9fs_wstat_post_lstat(s, vs, err); |
2427 |
return;
|
2428 |
} |
2429 |
|
2430 |
v9fs_wstat_post_chmod(s, vs, err); |
2431 |
return;
|
2432 |
|
2433 |
out:
|
2434 |
v9fs_stat_free(&vs->v9stat); |
2435 |
complete_pdu(s, vs->pdu, err); |
2436 |
qemu_free(vs); |
2437 |
} |
2438 |
|
2439 |
static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err) |
2440 |
{ |
2441 |
int32_t bsize_factor; |
2442 |
|
2443 |
if (err) {
|
2444 |
err = -errno; |
2445 |
goto out;
|
2446 |
} |
2447 |
|
2448 |
/*
|
2449 |
* compute bsize factor based on host file system block size
|
2450 |
* and client msize
|
2451 |
*/
|
2452 |
bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize; |
2453 |
if (!bsize_factor) {
|
2454 |
bsize_factor = 1;
|
2455 |
} |
2456 |
vs->v9statfs.f_type = vs->stbuf.f_type; |
2457 |
vs->v9statfs.f_bsize = vs->stbuf.f_bsize; |
2458 |
vs->v9statfs.f_bsize *= bsize_factor; |
2459 |
/*
|
2460 |
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
2461 |
* adjust(divide) the number of blocks, free blocks and available
|
2462 |
* blocks by bsize factor
|
2463 |
*/
|
2464 |
vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor; |
2465 |
vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor; |
2466 |
vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor; |
2467 |
vs->v9statfs.f_files = vs->stbuf.f_files; |
2468 |
vs->v9statfs.f_ffree = vs->stbuf.f_ffree; |
2469 |
vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] | |
2470 |
(unsigned long long)vs->stbuf.f_fsid.__val[1] << 32; |
2471 |
vs->v9statfs.f_namelen = vs->stbuf.f_namelen; |
2472 |
|
2473 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
|
2474 |
vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks, |
2475 |
vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files, |
2476 |
vs->v9statfs.f_ffree, vs->v9statfs.fsid_val, |
2477 |
vs->v9statfs.f_namelen); |
2478 |
|
2479 |
out:
|
2480 |
complete_pdu(s, vs->pdu, vs->offset); |
2481 |
qemu_free(vs); |
2482 |
} |
2483 |
|
2484 |
static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu) |
2485 |
{ |
2486 |
V9fsStatfsState *vs; |
2487 |
ssize_t err = 0;
|
2488 |
|
2489 |
vs = qemu_malloc(sizeof(*vs));
|
2490 |
vs->pdu = pdu; |
2491 |
vs->offset = 7;
|
2492 |
|
2493 |
memset(&vs->v9statfs, 0, sizeof(vs->v9statfs)); |
2494 |
|
2495 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
|
2496 |
|
2497 |
vs->fidp = lookup_fid(s, vs->fid); |
2498 |
if (vs->fidp == NULL) { |
2499 |
err = -ENOENT; |
2500 |
goto out;
|
2501 |
} |
2502 |
|
2503 |
err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf); |
2504 |
v9fs_statfs_post_statfs(s, vs, err); |
2505 |
return;
|
2506 |
|
2507 |
out:
|
2508 |
complete_pdu(s, vs->pdu, err); |
2509 |
qemu_free(vs); |
2510 |
} |
2511 |
|
2512 |
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
2513 |
|
2514 |
static pdu_handler_t *pdu_handlers[] = {
|
2515 |
[P9_TREADDIR] = v9fs_readdir, |
2516 |
[P9_TSTATFS] = v9fs_statfs, |
2517 |
[P9_TGETATTR] = v9fs_getattr, |
2518 |
[P9_TVERSION] = v9fs_version, |
2519 |
[P9_TATTACH] = v9fs_attach, |
2520 |
[P9_TSTAT] = v9fs_stat, |
2521 |
[P9_TWALK] = v9fs_walk, |
2522 |
[P9_TCLUNK] = v9fs_clunk, |
2523 |
[P9_TOPEN] = v9fs_open, |
2524 |
[P9_TREAD] = v9fs_read, |
2525 |
#if 0
|
2526 |
[P9_TAUTH] = v9fs_auth,
|
2527 |
#endif
|
2528 |
[P9_TFLUSH] = v9fs_flush, |
2529 |
[P9_TCREATE] = v9fs_create, |
2530 |
[P9_TWRITE] = v9fs_write, |
2531 |
[P9_TWSTAT] = v9fs_wstat, |
2532 |
[P9_TREMOVE] = v9fs_remove, |
2533 |
}; |
2534 |
|
2535 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
2536 |
{ |
2537 |
pdu_handler_t *handler; |
2538 |
|
2539 |
if (debug_9p_pdu) {
|
2540 |
pprint_pdu(pdu); |
2541 |
} |
2542 |
|
2543 |
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); |
2544 |
|
2545 |
handler = pdu_handlers[pdu->id]; |
2546 |
BUG_ON(handler == NULL);
|
2547 |
|
2548 |
handler(s, pdu); |
2549 |
} |
2550 |
|
2551 |
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
2552 |
{ |
2553 |
V9fsState *s = (V9fsState *)vdev; |
2554 |
V9fsPDU *pdu; |
2555 |
ssize_t len; |
2556 |
|
2557 |
while ((pdu = alloc_pdu(s)) &&
|
2558 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
2559 |
uint8_t *ptr; |
2560 |
|
2561 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
2562 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
2563 |
|
2564 |
ptr = pdu->elem.out_sg[0].iov_base;
|
2565 |
|
2566 |
memcpy(&pdu->size, ptr, 4);
|
2567 |
pdu->id = ptr[4];
|
2568 |
memcpy(&pdu->tag, ptr + 5, 2); |
2569 |
|
2570 |
submit_pdu(s, pdu); |
2571 |
} |
2572 |
|
2573 |
free_pdu(s, pdu); |
2574 |
} |
2575 |
|
2576 |
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
2577 |
{ |
2578 |
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
2579 |
return features;
|
2580 |
} |
2581 |
|
2582 |
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
2583 |
{ |
2584 |
return (V9fsState *)vdev;
|
2585 |
} |
2586 |
|
2587 |
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) |
2588 |
{ |
2589 |
struct virtio_9p_config *cfg;
|
2590 |
V9fsState *s = to_virtio_9p(vdev); |
2591 |
|
2592 |
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + |
2593 |
s->tag_len); |
2594 |
stw_raw(&cfg->tag_len, s->tag_len); |
2595 |
memcpy(cfg->tag, s->tag, s->tag_len); |
2596 |
memcpy(config, cfg, s->config_size); |
2597 |
qemu_free(cfg); |
2598 |
} |
2599 |
|
2600 |
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) |
2601 |
{ |
2602 |
V9fsState *s; |
2603 |
int i, len;
|
2604 |
struct stat stat;
|
2605 |
FsTypeEntry *fse; |
2606 |
|
2607 |
|
2608 |
s = (V9fsState *)virtio_common_init("virtio-9p",
|
2609 |
VIRTIO_ID_9P, |
2610 |
sizeof(struct virtio_9p_config)+ |
2611 |
MAX_TAG_LEN, |
2612 |
sizeof(V9fsState));
|
2613 |
|
2614 |
/* initialize pdu allocator */
|
2615 |
QLIST_INIT(&s->free_list); |
2616 |
for (i = 0; i < (MAX_REQ - 1); i++) { |
2617 |
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
2618 |
} |
2619 |
|
2620 |
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); |
2621 |
|
2622 |
fse = get_fsdev_fsentry(conf->fsdev_id); |
2623 |
|
2624 |
if (!fse) {
|
2625 |
/* We don't have a fsdev identified by fsdev_id */
|
2626 |
fprintf(stderr, "Virtio-9p device couldn't find fsdev "
|
2627 |
"with the id %s\n", conf->fsdev_id);
|
2628 |
exit(1);
|
2629 |
} |
2630 |
|
2631 |
if (!fse->path || !conf->tag) {
|
2632 |
/* we haven't specified a mount_tag or the path */
|
2633 |
fprintf(stderr, "fsdev with id %s needs path "
|
2634 |
"and Virtio-9p device needs mount_tag arguments\n",
|
2635 |
conf->fsdev_id); |
2636 |
exit(1);
|
2637 |
} |
2638 |
|
2639 |
if (!strcmp(fse->security_model, "passthrough")) { |
2640 |
/* Files on the Fileserver set to client user credentials */
|
2641 |
s->ctx.fs_sm = SM_PASSTHROUGH; |
2642 |
} else if (!strcmp(fse->security_model, "mapped")) { |
2643 |
/* Files on the fileserver are set to QEMU credentials.
|
2644 |
* Client user credentials are saved in extended attributes.
|
2645 |
*/
|
2646 |
s->ctx.fs_sm = SM_MAPPED; |
2647 |
} else {
|
2648 |
/* user haven't specified a correct security option */
|
2649 |
fprintf(stderr, "one of the following must be specified as the"
|
2650 |
"security option:\n\t security_model=passthrough \n\t "
|
2651 |
"security_model=mapped\n");
|
2652 |
return NULL; |
2653 |
} |
2654 |
|
2655 |
if (lstat(fse->path, &stat)) {
|
2656 |
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
2657 |
exit(1);
|
2658 |
} else if (!S_ISDIR(stat.st_mode)) { |
2659 |
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
2660 |
exit(1);
|
2661 |
} |
2662 |
|
2663 |
s->ctx.fs_root = qemu_strdup(fse->path); |
2664 |
len = strlen(conf->tag); |
2665 |
if (len > MAX_TAG_LEN) {
|
2666 |
len = MAX_TAG_LEN; |
2667 |
} |
2668 |
/* s->tag is non-NULL terminated string */
|
2669 |
s->tag = qemu_malloc(len); |
2670 |
memcpy(s->tag, conf->tag, len); |
2671 |
s->tag_len = len; |
2672 |
s->ctx.uid = -1;
|
2673 |
|
2674 |
s->ops = fse->ops; |
2675 |
s->vdev.get_features = virtio_9p_get_features; |
2676 |
s->config_size = sizeof(struct virtio_9p_config) + |
2677 |
s->tag_len; |
2678 |
s->vdev.get_config = virtio_9p_get_config; |
2679 |
|
2680 |
return &s->vdev;
|
2681 |
} |