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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, char *name, |
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mode_t mode, dev_t dev, 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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cred.fc_mode = mode; |
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cred.fc_rdev = dev; |
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return s->ops->mknod(&s->ctx, name, &cred);
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} |
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static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode, |
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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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cred.fc_mode = mode; |
184 |
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return s->ops->mkdir(&s->ctx, name, &cred);
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} |
187 |
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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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} |
192 |
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static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid, |
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int flags, int mode) |
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{ |
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FsCred cred; |
197 |
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cred_init(&cred); |
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cred.fc_uid = uid; |
200 |
cred.fc_gid = gid; |
201 |
cred.fc_mode = mode & 07777;
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flags = flags; |
203 |
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return s->ops->open2(&s->ctx, fullname, flags, &cred);
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} |
206 |
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static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp, |
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const char *oldpath, const char *newpath, gid_t gid) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
212 |
cred.fc_uid = fidp->uid; |
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cred.fc_gid = gid; |
214 |
cred.fc_mode = 0777;
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215 |
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return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
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} |
218 |
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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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} |
223 |
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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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} |
228 |
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static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, |
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V9fsString *newpath) |
231 |
{ |
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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; |
240 |
cred.fc_gid = gid; |
241 |
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return s->ops->chown(&s->ctx, path->data, &cred);
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} |
244 |
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static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
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const struct timespec times[2]) |
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{ |
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return s->ops->utimensat(&s->ctx, path->data, times);
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} |
250 |
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static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
252 |
{ |
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return s->ops->remove(&s->ctx, path->data);
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} |
255 |
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static int v9fs_do_fsync(V9fsState *s, int fd) |
257 |
{ |
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return s->ops->fsync(&s->ctx, fd);
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} |
260 |
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static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
262 |
{ |
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return s->ops->statfs(&s->ctx, path->data, stbuf);
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} |
265 |
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static ssize_t v9fs_do_lgetxattr(V9fsState *s, V9fsString *path,
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V9fsString *xattr_name, |
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void *value, size_t size)
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{ |
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return s->ops->lgetxattr(&s->ctx, path->data,
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xattr_name->data, value, size); |
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} |
273 |
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static ssize_t v9fs_do_llistxattr(V9fsState *s, V9fsString *path,
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void *value, size_t size)
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{ |
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return s->ops->llistxattr(&s->ctx, path->data,
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value, size); |
279 |
} |
280 |
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281 |
static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path, |
282 |
V9fsString *xattr_name, |
283 |
void *value, size_t size, int flags) |
284 |
{ |
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return s->ops->lsetxattr(&s->ctx, path->data,
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xattr_name->data, value, size, flags); |
287 |
} |
288 |
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static void v9fs_string_init(V9fsString *str) |
290 |
{ |
291 |
str->data = NULL;
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str->size = 0;
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293 |
} |
294 |
|
295 |
static void v9fs_string_free(V9fsString *str) |
296 |
{ |
297 |
qemu_free(str->data); |
298 |
str->data = NULL;
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299 |
str->size = 0;
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300 |
} |
301 |
|
302 |
static void v9fs_string_null(V9fsString *str) |
303 |
{ |
304 |
v9fs_string_free(str); |
305 |
} |
306 |
|
307 |
static int number_to_string(void *arg, char type) |
308 |
{ |
309 |
unsigned int ret = 0; |
310 |
|
311 |
switch (type) {
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312 |
case 'u': { |
313 |
unsigned int num = *(unsigned int *)arg; |
314 |
|
315 |
do {
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316 |
ret++; |
317 |
num = num/10;
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318 |
} while (num);
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319 |
break;
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320 |
} |
321 |
default:
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322 |
printf("Number_to_string: Unknown number format\n");
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323 |
return -1; |
324 |
} |
325 |
|
326 |
return ret;
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327 |
} |
328 |
|
329 |
static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) |
330 |
{ |
331 |
va_list ap2; |
332 |
char *iter = (char *)fmt; |
333 |
int len = 0; |
334 |
int nr_args = 0; |
335 |
char *arg_char_ptr;
|
336 |
unsigned int arg_uint; |
337 |
|
338 |
/* Find the number of %'s that denotes an argument */
|
339 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
340 |
nr_args++; |
341 |
iter++; |
342 |
} |
343 |
|
344 |
len = strlen(fmt) - 2*nr_args;
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345 |
|
346 |
if (!nr_args) {
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347 |
goto alloc_print;
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348 |
} |
349 |
|
350 |
va_copy(ap2, ap); |
351 |
|
352 |
iter = (char *)fmt;
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353 |
|
354 |
/* Now parse the format string */
|
355 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
356 |
iter++; |
357 |
switch (*iter) {
|
358 |
case 'u': |
359 |
arg_uint = va_arg(ap2, unsigned int); |
360 |
len += number_to_string((void *)&arg_uint, 'u'); |
361 |
break;
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362 |
case 's': |
363 |
arg_char_ptr = va_arg(ap2, char *);
|
364 |
len += strlen(arg_char_ptr); |
365 |
break;
|
366 |
case 'c': |
367 |
len += 1;
|
368 |
break;
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369 |
default:
|
370 |
fprintf(stderr, |
371 |
"v9fs_string_alloc_printf:Incorrect format %c", *iter);
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372 |
return -1; |
373 |
} |
374 |
iter++; |
375 |
} |
376 |
|
377 |
alloc_print:
|
378 |
*strp = qemu_malloc((len + 1) * sizeof(**strp)); |
379 |
|
380 |
return vsprintf(*strp, fmt, ap);
|
381 |
} |
382 |
|
383 |
static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
384 |
{ |
385 |
va_list ap; |
386 |
int err;
|
387 |
|
388 |
v9fs_string_free(str); |
389 |
|
390 |
va_start(ap, fmt); |
391 |
err = v9fs_string_alloc_printf(&str->data, fmt, ap); |
392 |
BUG_ON(err == -1);
|
393 |
va_end(ap); |
394 |
|
395 |
str->size = err; |
396 |
} |
397 |
|
398 |
static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
399 |
{ |
400 |
v9fs_string_free(lhs); |
401 |
v9fs_string_sprintf(lhs, "%s", rhs->data);
|
402 |
} |
403 |
|
404 |
static size_t v9fs_string_size(V9fsString *str)
|
405 |
{ |
406 |
return str->size;
|
407 |
} |
408 |
|
409 |
static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
|
410 |
{ |
411 |
V9fsFidState *f; |
412 |
|
413 |
for (f = s->fid_list; f; f = f->next) {
|
414 |
if (f->fid == fid) {
|
415 |
return f;
|
416 |
} |
417 |
} |
418 |
|
419 |
return NULL; |
420 |
} |
421 |
|
422 |
static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
423 |
{ |
424 |
V9fsFidState *f; |
425 |
|
426 |
f = lookup_fid(s, fid); |
427 |
if (f) {
|
428 |
return NULL; |
429 |
} |
430 |
|
431 |
f = qemu_mallocz(sizeof(V9fsFidState));
|
432 |
|
433 |
f->fid = fid; |
434 |
f->fid_type = P9_FID_NONE; |
435 |
|
436 |
f->next = s->fid_list; |
437 |
s->fid_list = f; |
438 |
|
439 |
return f;
|
440 |
} |
441 |
|
442 |
static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
443 |
{ |
444 |
int retval = 0; |
445 |
|
446 |
if (fidp->fs.xattr.copied_len == -1) { |
447 |
/* getxattr/listxattr fid */
|
448 |
goto free_value;
|
449 |
} |
450 |
/*
|
451 |
* if this is fid for setxattr. clunk should
|
452 |
* result in setxattr localcall
|
453 |
*/
|
454 |
if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
|
455 |
/* clunk after partial write */
|
456 |
retval = -EINVAL; |
457 |
goto free_out;
|
458 |
} |
459 |
retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, |
460 |
fidp->fs.xattr.value, |
461 |
fidp->fs.xattr.len, |
462 |
fidp->fs.xattr.flags); |
463 |
free_out:
|
464 |
v9fs_string_free(&fidp->fs.xattr.name); |
465 |
free_value:
|
466 |
if (fidp->fs.xattr.value) {
|
467 |
qemu_free(fidp->fs.xattr.value); |
468 |
} |
469 |
return retval;
|
470 |
} |
471 |
|
472 |
static int free_fid(V9fsState *s, int32_t fid) |
473 |
{ |
474 |
int retval = 0; |
475 |
V9fsFidState **fidpp, *fidp; |
476 |
|
477 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
478 |
if ((*fidpp)->fid == fid) {
|
479 |
break;
|
480 |
} |
481 |
} |
482 |
|
483 |
if (*fidpp == NULL) { |
484 |
return -ENOENT;
|
485 |
} |
486 |
|
487 |
fidp = *fidpp; |
488 |
*fidpp = fidp->next; |
489 |
|
490 |
if (fidp->fid_type == P9_FID_FILE) {
|
491 |
v9fs_do_close(s, fidp->fs.fd); |
492 |
} else if (fidp->fid_type == P9_FID_DIR) { |
493 |
v9fs_do_closedir(s, fidp->fs.dir); |
494 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
495 |
retval = v9fs_xattr_fid_clunk(s, fidp); |
496 |
} |
497 |
v9fs_string_free(&fidp->path); |
498 |
qemu_free(fidp); |
499 |
|
500 |
return retval;
|
501 |
} |
502 |
|
503 |
#define P9_QID_TYPE_DIR 0x80 |
504 |
#define P9_QID_TYPE_SYMLINK 0x02 |
505 |
|
506 |
#define P9_STAT_MODE_DIR 0x80000000 |
507 |
#define P9_STAT_MODE_APPEND 0x40000000 |
508 |
#define P9_STAT_MODE_EXCL 0x20000000 |
509 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
510 |
#define P9_STAT_MODE_AUTH 0x08000000 |
511 |
#define P9_STAT_MODE_TMP 0x04000000 |
512 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
513 |
#define P9_STAT_MODE_LINK 0x01000000 |
514 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
515 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
516 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
517 |
#define P9_STAT_MODE_SETUID 0x00080000 |
518 |
#define P9_STAT_MODE_SETGID 0x00040000 |
519 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
520 |
|
521 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
522 |
P9_STAT_MODE_SYMLINK | \ |
523 |
P9_STAT_MODE_LINK | \ |
524 |
P9_STAT_MODE_DEVICE | \ |
525 |
P9_STAT_MODE_NAMED_PIPE | \ |
526 |
P9_STAT_MODE_SOCKET) |
527 |
|
528 |
/* This is the algorithm from ufs in spfs */
|
529 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
530 |
{ |
531 |
size_t size; |
532 |
|
533 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
534 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
535 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
536 |
qidp->type = 0;
|
537 |
if (S_ISDIR(stbuf->st_mode)) {
|
538 |
qidp->type |= P9_QID_TYPE_DIR; |
539 |
} |
540 |
if (S_ISLNK(stbuf->st_mode)) {
|
541 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
542 |
} |
543 |
} |
544 |
|
545 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
546 |
{ |
547 |
struct stat stbuf;
|
548 |
int err;
|
549 |
|
550 |
err = v9fs_do_lstat(s, &fidp->path, &stbuf); |
551 |
if (err) {
|
552 |
return err;
|
553 |
} |
554 |
|
555 |
stat_to_qid(&stbuf, qidp); |
556 |
return 0; |
557 |
} |
558 |
|
559 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
560 |
{ |
561 |
V9fsPDU *pdu = NULL;
|
562 |
|
563 |
if (!QLIST_EMPTY(&s->free_list)) {
|
564 |
pdu = QLIST_FIRST(&s->free_list); |
565 |
QLIST_REMOVE(pdu, next); |
566 |
} |
567 |
return pdu;
|
568 |
} |
569 |
|
570 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
571 |
{ |
572 |
if (pdu) {
|
573 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
574 |
} |
575 |
} |
576 |
|
577 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
578 |
size_t offset, size_t size, int pack)
|
579 |
{ |
580 |
int i = 0; |
581 |
size_t copied = 0;
|
582 |
|
583 |
for (i = 0; size && i < sg_count; i++) { |
584 |
size_t len; |
585 |
if (offset >= sg[i].iov_len) {
|
586 |
/* skip this sg */
|
587 |
offset -= sg[i].iov_len; |
588 |
continue;
|
589 |
} else {
|
590 |
len = MIN(sg[i].iov_len - offset, size); |
591 |
if (pack) {
|
592 |
memcpy(sg[i].iov_base + offset, addr, len); |
593 |
} else {
|
594 |
memcpy(addr, sg[i].iov_base + offset, len); |
595 |
} |
596 |
size -= len; |
597 |
copied += len; |
598 |
addr += len; |
599 |
if (size) {
|
600 |
offset = 0;
|
601 |
continue;
|
602 |
} |
603 |
} |
604 |
} |
605 |
|
606 |
return copied;
|
607 |
} |
608 |
|
609 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
610 |
{ |
611 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
612 |
offset, size, 0);
|
613 |
} |
614 |
|
615 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
616 |
size_t size) |
617 |
{ |
618 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
619 |
offset, size, 1);
|
620 |
} |
621 |
|
622 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
623 |
{ |
624 |
size_t pos = 0;
|
625 |
int i, j;
|
626 |
struct iovec *src_sg;
|
627 |
unsigned int num; |
628 |
|
629 |
if (rx) {
|
630 |
src_sg = pdu->elem.in_sg; |
631 |
num = pdu->elem.in_num; |
632 |
} else {
|
633 |
src_sg = pdu->elem.out_sg; |
634 |
num = pdu->elem.out_num; |
635 |
} |
636 |
|
637 |
j = 0;
|
638 |
for (i = 0; i < num; i++) { |
639 |
if (offset <= pos) {
|
640 |
sg[j].iov_base = src_sg[i].iov_base; |
641 |
sg[j].iov_len = src_sg[i].iov_len; |
642 |
j++; |
643 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
644 |
sg[j].iov_base = src_sg[i].iov_base; |
645 |
sg[j].iov_len = src_sg[i].iov_len; |
646 |
sg[j].iov_base += (offset - pos); |
647 |
sg[j].iov_len -= (offset - pos); |
648 |
j++; |
649 |
} |
650 |
pos += src_sg[i].iov_len; |
651 |
} |
652 |
|
653 |
return j;
|
654 |
} |
655 |
|
656 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
657 |
{ |
658 |
size_t old_offset = offset; |
659 |
va_list ap; |
660 |
int i;
|
661 |
|
662 |
va_start(ap, fmt); |
663 |
for (i = 0; fmt[i]; i++) { |
664 |
switch (fmt[i]) {
|
665 |
case 'b': { |
666 |
uint8_t *valp = va_arg(ap, uint8_t *); |
667 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
668 |
break;
|
669 |
} |
670 |
case 'w': { |
671 |
uint16_t val, *valp; |
672 |
valp = va_arg(ap, uint16_t *); |
673 |
val = le16_to_cpupu(valp); |
674 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
675 |
*valp = val; |
676 |
break;
|
677 |
} |
678 |
case 'd': { |
679 |
uint32_t val, *valp; |
680 |
valp = va_arg(ap, uint32_t *); |
681 |
val = le32_to_cpupu(valp); |
682 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
683 |
*valp = val; |
684 |
break;
|
685 |
} |
686 |
case 'q': { |
687 |
uint64_t val, *valp; |
688 |
valp = va_arg(ap, uint64_t *); |
689 |
val = le64_to_cpup(valp); |
690 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
691 |
*valp = val; |
692 |
break;
|
693 |
} |
694 |
case 'v': { |
695 |
struct iovec *iov = va_arg(ap, struct iovec *); |
696 |
int *iovcnt = va_arg(ap, int *); |
697 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
698 |
break;
|
699 |
} |
700 |
case 's': { |
701 |
V9fsString *str = va_arg(ap, V9fsString *); |
702 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
703 |
/* FIXME: sanity check str->size */
|
704 |
str->data = qemu_malloc(str->size + 1);
|
705 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
706 |
str->data[str->size] = 0;
|
707 |
break;
|
708 |
} |
709 |
case 'Q': { |
710 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
711 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
712 |
&qidp->type, &qidp->version, &qidp->path); |
713 |
break;
|
714 |
} |
715 |
case 'S': { |
716 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
717 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
718 |
&statp->size, &statp->type, &statp->dev, |
719 |
&statp->qid, &statp->mode, &statp->atime, |
720 |
&statp->mtime, &statp->length, |
721 |
&statp->name, &statp->uid, &statp->gid, |
722 |
&statp->muid, &statp->extension, |
723 |
&statp->n_uid, &statp->n_gid, |
724 |
&statp->n_muid); |
725 |
break;
|
726 |
} |
727 |
case 'I': { |
728 |
V9fsIattr *iattr = va_arg(ap, V9fsIattr *); |
729 |
offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
|
730 |
&iattr->valid, &iattr->mode, |
731 |
&iattr->uid, &iattr->gid, &iattr->size, |
732 |
&iattr->atime_sec, &iattr->atime_nsec, |
733 |
&iattr->mtime_sec, &iattr->mtime_nsec); |
734 |
break;
|
735 |
} |
736 |
default:
|
737 |
break;
|
738 |
} |
739 |
} |
740 |
|
741 |
va_end(ap); |
742 |
|
743 |
return offset - old_offset;
|
744 |
} |
745 |
|
746 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
747 |
{ |
748 |
size_t old_offset = offset; |
749 |
va_list ap; |
750 |
int i;
|
751 |
|
752 |
va_start(ap, fmt); |
753 |
for (i = 0; fmt[i]; i++) { |
754 |
switch (fmt[i]) {
|
755 |
case 'b': { |
756 |
uint8_t val = va_arg(ap, int);
|
757 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
758 |
break;
|
759 |
} |
760 |
case 'w': { |
761 |
uint16_t val; |
762 |
cpu_to_le16w(&val, va_arg(ap, int));
|
763 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
764 |
break;
|
765 |
} |
766 |
case 'd': { |
767 |
uint32_t val; |
768 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
769 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
770 |
break;
|
771 |
} |
772 |
case 'q': { |
773 |
uint64_t val; |
774 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
775 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
776 |
break;
|
777 |
} |
778 |
case 'v': { |
779 |
struct iovec *iov = va_arg(ap, struct iovec *); |
780 |
int *iovcnt = va_arg(ap, int *); |
781 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
782 |
break;
|
783 |
} |
784 |
case 's': { |
785 |
V9fsString *str = va_arg(ap, V9fsString *); |
786 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
787 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
788 |
break;
|
789 |
} |
790 |
case 'Q': { |
791 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
792 |
offset += pdu_marshal(pdu, offset, "bdq",
|
793 |
qidp->type, qidp->version, qidp->path); |
794 |
break;
|
795 |
} |
796 |
case 'S': { |
797 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
798 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
799 |
statp->size, statp->type, statp->dev, |
800 |
&statp->qid, statp->mode, statp->atime, |
801 |
statp->mtime, statp->length, &statp->name, |
802 |
&statp->uid, &statp->gid, &statp->muid, |
803 |
&statp->extension, statp->n_uid, |
804 |
statp->n_gid, statp->n_muid); |
805 |
break;
|
806 |
} |
807 |
case 'A': { |
808 |
V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); |
809 |
offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
|
810 |
statp->st_result_mask, |
811 |
&statp->qid, statp->st_mode, |
812 |
statp->st_uid, statp->st_gid, |
813 |
statp->st_nlink, statp->st_rdev, |
814 |
statp->st_size, statp->st_blksize, statp->st_blocks, |
815 |
statp->st_atime_sec, statp->st_atime_nsec, |
816 |
statp->st_mtime_sec, statp->st_mtime_nsec, |
817 |
statp->st_ctime_sec, statp->st_ctime_nsec, |
818 |
statp->st_btime_sec, statp->st_btime_nsec, |
819 |
statp->st_gen, statp->st_data_version); |
820 |
break;
|
821 |
} |
822 |
default:
|
823 |
break;
|
824 |
} |
825 |
} |
826 |
va_end(ap); |
827 |
|
828 |
return offset - old_offset;
|
829 |
} |
830 |
|
831 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
832 |
{ |
833 |
int8_t id = pdu->id + 1; /* Response */ |
834 |
|
835 |
if (len < 0) { |
836 |
V9fsString str; |
837 |
int err = -len;
|
838 |
|
839 |
str.data = strerror(err); |
840 |
str.size = strlen(str.data); |
841 |
|
842 |
len = 7;
|
843 |
len += pdu_marshal(pdu, len, "s", &str);
|
844 |
if (dotu) {
|
845 |
len += pdu_marshal(pdu, len, "d", err);
|
846 |
} |
847 |
|
848 |
id = P9_RERROR; |
849 |
} |
850 |
|
851 |
/* fill out the header */
|
852 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
853 |
|
854 |
/* keep these in sync */
|
855 |
pdu->size = len; |
856 |
pdu->id = id; |
857 |
|
858 |
/* push onto queue and notify */
|
859 |
virtqueue_push(s->vq, &pdu->elem, len); |
860 |
|
861 |
/* FIXME: we should batch these completions */
|
862 |
virtio_notify(&s->vdev, s->vq); |
863 |
|
864 |
free_pdu(s, pdu); |
865 |
} |
866 |
|
867 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
868 |
{ |
869 |
mode_t ret; |
870 |
|
871 |
ret = mode & 0777;
|
872 |
if (mode & P9_STAT_MODE_DIR) {
|
873 |
ret |= S_IFDIR; |
874 |
} |
875 |
|
876 |
if (dotu) {
|
877 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
878 |
ret |= S_IFLNK; |
879 |
} |
880 |
if (mode & P9_STAT_MODE_SOCKET) {
|
881 |
ret |= S_IFSOCK; |
882 |
} |
883 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
884 |
ret |= S_IFIFO; |
885 |
} |
886 |
if (mode & P9_STAT_MODE_DEVICE) {
|
887 |
if (extension && extension->data[0] == 'c') { |
888 |
ret |= S_IFCHR; |
889 |
} else {
|
890 |
ret |= S_IFBLK; |
891 |
} |
892 |
} |
893 |
} |
894 |
|
895 |
if (!(ret&~0777)) { |
896 |
ret |= S_IFREG; |
897 |
} |
898 |
|
899 |
if (mode & P9_STAT_MODE_SETUID) {
|
900 |
ret |= S_ISUID; |
901 |
} |
902 |
if (mode & P9_STAT_MODE_SETGID) {
|
903 |
ret |= S_ISGID; |
904 |
} |
905 |
if (mode & P9_STAT_MODE_SETVTX) {
|
906 |
ret |= S_ISVTX; |
907 |
} |
908 |
|
909 |
return ret;
|
910 |
} |
911 |
|
912 |
static int donttouch_stat(V9fsStat *stat) |
913 |
{ |
914 |
if (stat->type == -1 && |
915 |
stat->dev == -1 &&
|
916 |
stat->qid.type == -1 &&
|
917 |
stat->qid.version == -1 &&
|
918 |
stat->qid.path == -1 &&
|
919 |
stat->mode == -1 &&
|
920 |
stat->atime == -1 &&
|
921 |
stat->mtime == -1 &&
|
922 |
stat->length == -1 &&
|
923 |
!stat->name.size && |
924 |
!stat->uid.size && |
925 |
!stat->gid.size && |
926 |
!stat->muid.size && |
927 |
stat->n_uid == -1 &&
|
928 |
stat->n_gid == -1 &&
|
929 |
stat->n_muid == -1) {
|
930 |
return 1; |
931 |
} |
932 |
|
933 |
return 0; |
934 |
} |
935 |
|
936 |
static void v9fs_stat_free(V9fsStat *stat) |
937 |
{ |
938 |
v9fs_string_free(&stat->name); |
939 |
v9fs_string_free(&stat->uid); |
940 |
v9fs_string_free(&stat->gid); |
941 |
v9fs_string_free(&stat->muid); |
942 |
v9fs_string_free(&stat->extension); |
943 |
} |
944 |
|
945 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
946 |
{ |
947 |
uint32_t mode; |
948 |
|
949 |
mode = stbuf->st_mode & 0777;
|
950 |
if (S_ISDIR(stbuf->st_mode)) {
|
951 |
mode |= P9_STAT_MODE_DIR; |
952 |
} |
953 |
|
954 |
if (dotu) {
|
955 |
if (S_ISLNK(stbuf->st_mode)) {
|
956 |
mode |= P9_STAT_MODE_SYMLINK; |
957 |
} |
958 |
|
959 |
if (S_ISSOCK(stbuf->st_mode)) {
|
960 |
mode |= P9_STAT_MODE_SOCKET; |
961 |
} |
962 |
|
963 |
if (S_ISFIFO(stbuf->st_mode)) {
|
964 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
965 |
} |
966 |
|
967 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
968 |
mode |= P9_STAT_MODE_DEVICE; |
969 |
} |
970 |
|
971 |
if (stbuf->st_mode & S_ISUID) {
|
972 |
mode |= P9_STAT_MODE_SETUID; |
973 |
} |
974 |
|
975 |
if (stbuf->st_mode & S_ISGID) {
|
976 |
mode |= P9_STAT_MODE_SETGID; |
977 |
} |
978 |
|
979 |
if (stbuf->st_mode & S_ISVTX) {
|
980 |
mode |= P9_STAT_MODE_SETVTX; |
981 |
} |
982 |
} |
983 |
|
984 |
return mode;
|
985 |
} |
986 |
|
987 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
988 |
const struct stat *stbuf, |
989 |
V9fsStat *v9stat) |
990 |
{ |
991 |
int err;
|
992 |
const char *str; |
993 |
|
994 |
memset(v9stat, 0, sizeof(*v9stat)); |
995 |
|
996 |
stat_to_qid(stbuf, &v9stat->qid); |
997 |
v9stat->mode = stat_to_v9mode(stbuf); |
998 |
v9stat->atime = stbuf->st_atime; |
999 |
v9stat->mtime = stbuf->st_mtime; |
1000 |
v9stat->length = stbuf->st_size; |
1001 |
|
1002 |
v9fs_string_null(&v9stat->uid); |
1003 |
v9fs_string_null(&v9stat->gid); |
1004 |
v9fs_string_null(&v9stat->muid); |
1005 |
|
1006 |
if (dotu) {
|
1007 |
v9stat->n_uid = stbuf->st_uid; |
1008 |
v9stat->n_gid = stbuf->st_gid; |
1009 |
v9stat->n_muid = 0;
|
1010 |
|
1011 |
v9fs_string_null(&v9stat->extension); |
1012 |
|
1013 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
1014 |
err = v9fs_do_readlink(s, name, &v9stat->extension); |
1015 |
if (err == -1) { |
1016 |
err = -errno; |
1017 |
return err;
|
1018 |
} |
1019 |
v9stat->extension.data[err] = 0;
|
1020 |
v9stat->extension.size = err; |
1021 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1022 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
1023 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
1024 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
1025 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
1026 |
v9fs_string_sprintf(&v9stat->extension, "%s %u",
|
1027 |
"HARDLINKCOUNT", stbuf->st_nlink);
|
1028 |
} |
1029 |
} |
1030 |
|
1031 |
str = strrchr(name->data, '/');
|
1032 |
if (str) {
|
1033 |
str += 1;
|
1034 |
} else {
|
1035 |
str = name->data; |
1036 |
} |
1037 |
|
1038 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
1039 |
|
1040 |
v9stat->size = 61 +
|
1041 |
v9fs_string_size(&v9stat->name) + |
1042 |
v9fs_string_size(&v9stat->uid) + |
1043 |
v9fs_string_size(&v9stat->gid) + |
1044 |
v9fs_string_size(&v9stat->muid) + |
1045 |
v9fs_string_size(&v9stat->extension); |
1046 |
return 0; |
1047 |
} |
1048 |
|
1049 |
#define P9_STATS_MODE 0x00000001ULL |
1050 |
#define P9_STATS_NLINK 0x00000002ULL |
1051 |
#define P9_STATS_UID 0x00000004ULL |
1052 |
#define P9_STATS_GID 0x00000008ULL |
1053 |
#define P9_STATS_RDEV 0x00000010ULL |
1054 |
#define P9_STATS_ATIME 0x00000020ULL |
1055 |
#define P9_STATS_MTIME 0x00000040ULL |
1056 |
#define P9_STATS_CTIME 0x00000080ULL |
1057 |
#define P9_STATS_INO 0x00000100ULL |
1058 |
#define P9_STATS_SIZE 0x00000200ULL |
1059 |
#define P9_STATS_BLOCKS 0x00000400ULL |
1060 |
|
1061 |
#define P9_STATS_BTIME 0x00000800ULL |
1062 |
#define P9_STATS_GEN 0x00001000ULL |
1063 |
#define P9_STATS_DATA_VERSION 0x00002000ULL |
1064 |
|
1065 |
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ |
1066 |
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ |
1067 |
|
1068 |
|
1069 |
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, |
1070 |
V9fsStatDotl *v9lstat) |
1071 |
{ |
1072 |
memset(v9lstat, 0, sizeof(*v9lstat)); |
1073 |
|
1074 |
v9lstat->st_mode = stbuf->st_mode; |
1075 |
v9lstat->st_nlink = stbuf->st_nlink; |
1076 |
v9lstat->st_uid = stbuf->st_uid; |
1077 |
v9lstat->st_gid = stbuf->st_gid; |
1078 |
v9lstat->st_rdev = stbuf->st_rdev; |
1079 |
v9lstat->st_size = stbuf->st_size; |
1080 |
v9lstat->st_blksize = stbuf->st_blksize; |
1081 |
v9lstat->st_blocks = stbuf->st_blocks; |
1082 |
v9lstat->st_atime_sec = stbuf->st_atime; |
1083 |
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; |
1084 |
v9lstat->st_mtime_sec = stbuf->st_mtime; |
1085 |
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; |
1086 |
v9lstat->st_ctime_sec = stbuf->st_ctime; |
1087 |
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; |
1088 |
/* Currently we only support BASIC fields in stat */
|
1089 |
v9lstat->st_result_mask = P9_STATS_BASIC; |
1090 |
|
1091 |
stat_to_qid(stbuf, &v9lstat->qid); |
1092 |
} |
1093 |
|
1094 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1095 |
{ |
1096 |
while (len && *iovcnt) {
|
1097 |
if (len < sg->iov_len) {
|
1098 |
sg->iov_len -= len; |
1099 |
sg->iov_base += len; |
1100 |
len = 0;
|
1101 |
} else {
|
1102 |
len -= sg->iov_len; |
1103 |
sg++; |
1104 |
*iovcnt -= 1;
|
1105 |
} |
1106 |
} |
1107 |
|
1108 |
return sg;
|
1109 |
} |
1110 |
|
1111 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
1112 |
{ |
1113 |
int i;
|
1114 |
int total = 0; |
1115 |
|
1116 |
for (i = 0; i < *cnt; i++) { |
1117 |
if ((total + sg[i].iov_len) > cap) {
|
1118 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
1119 |
i++; |
1120 |
break;
|
1121 |
} |
1122 |
total += sg[i].iov_len; |
1123 |
} |
1124 |
|
1125 |
*cnt = i; |
1126 |
|
1127 |
return sg;
|
1128 |
} |
1129 |
|
1130 |
static void print_sg(struct iovec *sg, int cnt) |
1131 |
{ |
1132 |
int i;
|
1133 |
|
1134 |
printf("sg[%d]: {", cnt);
|
1135 |
for (i = 0; i < cnt; i++) { |
1136 |
if (i) {
|
1137 |
printf(", ");
|
1138 |
} |
1139 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
1140 |
} |
1141 |
printf("}\n");
|
1142 |
} |
1143 |
|
1144 |
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1145 |
{ |
1146 |
V9fsString str; |
1147 |
v9fs_string_init(&str); |
1148 |
v9fs_string_copy(&str, dst); |
1149 |
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
1150 |
v9fs_string_free(&str); |
1151 |
} |
1152 |
|
1153 |
static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
1154 |
{ |
1155 |
V9fsString version; |
1156 |
size_t offset = 7;
|
1157 |
|
1158 |
pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
1159 |
|
1160 |
if (!strcmp(version.data, "9P2000.u")) { |
1161 |
s->proto_version = V9FS_PROTO_2000U; |
1162 |
} else if (!strcmp(version.data, "9P2000.L")) { |
1163 |
s->proto_version = V9FS_PROTO_2000L; |
1164 |
} else {
|
1165 |
v9fs_string_sprintf(&version, "unknown");
|
1166 |
} |
1167 |
|
1168 |
offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
1169 |
complete_pdu(s, pdu, offset); |
1170 |
|
1171 |
v9fs_string_free(&version); |
1172 |
} |
1173 |
|
1174 |
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) |
1175 |
{ |
1176 |
int32_t fid, afid, n_uname; |
1177 |
V9fsString uname, aname; |
1178 |
V9fsFidState *fidp; |
1179 |
V9fsQID qid; |
1180 |
size_t offset = 7;
|
1181 |
ssize_t err; |
1182 |
|
1183 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
1184 |
|
1185 |
fidp = alloc_fid(s, fid); |
1186 |
if (fidp == NULL) { |
1187 |
err = -EINVAL; |
1188 |
goto out;
|
1189 |
} |
1190 |
|
1191 |
fidp->uid = n_uname; |
1192 |
|
1193 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
1194 |
err = fid_to_qid(s, fidp, &qid); |
1195 |
if (err) {
|
1196 |
err = -EINVAL; |
1197 |
free_fid(s, fid); |
1198 |
goto out;
|
1199 |
} |
1200 |
|
1201 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
1202 |
|
1203 |
err = offset; |
1204 |
out:
|
1205 |
complete_pdu(s, pdu, err); |
1206 |
v9fs_string_free(&uname); |
1207 |
v9fs_string_free(&aname); |
1208 |
} |
1209 |
|
1210 |
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1211 |
{ |
1212 |
if (err == -1) { |
1213 |
err = -errno; |
1214 |
goto out;
|
1215 |
} |
1216 |
|
1217 |
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); |
1218 |
if (err) {
|
1219 |
goto out;
|
1220 |
} |
1221 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); |
1222 |
err = vs->offset; |
1223 |
|
1224 |
out:
|
1225 |
complete_pdu(s, vs->pdu, err); |
1226 |
v9fs_stat_free(&vs->v9stat); |
1227 |
qemu_free(vs); |
1228 |
} |
1229 |
|
1230 |
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1231 |
{ |
1232 |
int32_t fid; |
1233 |
V9fsStatState *vs; |
1234 |
ssize_t err = 0;
|
1235 |
|
1236 |
vs = qemu_malloc(sizeof(*vs));
|
1237 |
vs->pdu = pdu; |
1238 |
vs->offset = 7;
|
1239 |
|
1240 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1241 |
|
1242 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
1243 |
|
1244 |
vs->fidp = lookup_fid(s, fid); |
1245 |
if (vs->fidp == NULL) { |
1246 |
err = -ENOENT; |
1247 |
goto out;
|
1248 |
} |
1249 |
|
1250 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1251 |
v9fs_stat_post_lstat(s, vs, err); |
1252 |
return;
|
1253 |
|
1254 |
out:
|
1255 |
complete_pdu(s, vs->pdu, err); |
1256 |
v9fs_stat_free(&vs->v9stat); |
1257 |
qemu_free(vs); |
1258 |
} |
1259 |
|
1260 |
static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs, |
1261 |
int err)
|
1262 |
{ |
1263 |
if (err == -1) { |
1264 |
err = -errno; |
1265 |
goto out;
|
1266 |
} |
1267 |
|
1268 |
stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl); |
1269 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
|
1270 |
err = vs->offset; |
1271 |
|
1272 |
out:
|
1273 |
complete_pdu(s, vs->pdu, err); |
1274 |
qemu_free(vs); |
1275 |
} |
1276 |
|
1277 |
static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu) |
1278 |
{ |
1279 |
int32_t fid; |
1280 |
V9fsStatStateDotl *vs; |
1281 |
ssize_t err = 0;
|
1282 |
V9fsFidState *fidp; |
1283 |
uint64_t request_mask; |
1284 |
|
1285 |
vs = qemu_malloc(sizeof(*vs));
|
1286 |
vs->pdu = pdu; |
1287 |
vs->offset = 7;
|
1288 |
|
1289 |
memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl)); |
1290 |
|
1291 |
pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
|
1292 |
|
1293 |
fidp = lookup_fid(s, fid); |
1294 |
if (fidp == NULL) { |
1295 |
err = -ENOENT; |
1296 |
goto out;
|
1297 |
} |
1298 |
|
1299 |
/* Currently we only support BASIC fields in stat, so there is no
|
1300 |
* need to look at request_mask.
|
1301 |
*/
|
1302 |
err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf); |
1303 |
v9fs_getattr_post_lstat(s, vs, err); |
1304 |
return;
|
1305 |
|
1306 |
out:
|
1307 |
complete_pdu(s, vs->pdu, err); |
1308 |
qemu_free(vs); |
1309 |
} |
1310 |
|
1311 |
/* From Linux kernel code */
|
1312 |
#define ATTR_MODE (1 << 0) |
1313 |
#define ATTR_UID (1 << 1) |
1314 |
#define ATTR_GID (1 << 2) |
1315 |
#define ATTR_SIZE (1 << 3) |
1316 |
#define ATTR_ATIME (1 << 4) |
1317 |
#define ATTR_MTIME (1 << 5) |
1318 |
#define ATTR_CTIME (1 << 6) |
1319 |
#define ATTR_MASK 127 |
1320 |
#define ATTR_ATIME_SET (1 << 7) |
1321 |
#define ATTR_MTIME_SET (1 << 8) |
1322 |
|
1323 |
static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs, |
1324 |
int err)
|
1325 |
{ |
1326 |
if (err == -1) { |
1327 |
err = -errno; |
1328 |
goto out;
|
1329 |
} |
1330 |
err = vs->offset; |
1331 |
|
1332 |
out:
|
1333 |
complete_pdu(s, vs->pdu, err); |
1334 |
qemu_free(vs); |
1335 |
} |
1336 |
|
1337 |
static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err) |
1338 |
{ |
1339 |
if (err == -1) { |
1340 |
err = -errno; |
1341 |
goto out;
|
1342 |
} |
1343 |
|
1344 |
if (vs->v9iattr.valid & (ATTR_SIZE)) {
|
1345 |
err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size); |
1346 |
} |
1347 |
v9fs_setattr_post_truncate(s, vs, err); |
1348 |
return;
|
1349 |
|
1350 |
out:
|
1351 |
complete_pdu(s, vs->pdu, err); |
1352 |
qemu_free(vs); |
1353 |
} |
1354 |
|
1355 |
static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs, |
1356 |
int err)
|
1357 |
{ |
1358 |
if (err == -1) { |
1359 |
err = -errno; |
1360 |
goto out;
|
1361 |
} |
1362 |
|
1363 |
/* If the only valid entry in iattr is ctime we can call
|
1364 |
* chown(-1,-1) to update the ctime of the file
|
1365 |
*/
|
1366 |
if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
|
1367 |
((vs->v9iattr.valid & ATTR_CTIME) |
1368 |
&& !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { |
1369 |
if (!(vs->v9iattr.valid & ATTR_UID)) {
|
1370 |
vs->v9iattr.uid = -1;
|
1371 |
} |
1372 |
if (!(vs->v9iattr.valid & ATTR_GID)) {
|
1373 |
vs->v9iattr.gid = -1;
|
1374 |
} |
1375 |
err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid, |
1376 |
vs->v9iattr.gid); |
1377 |
} |
1378 |
v9fs_setattr_post_chown(s, vs, err); |
1379 |
return;
|
1380 |
|
1381 |
out:
|
1382 |
complete_pdu(s, vs->pdu, err); |
1383 |
qemu_free(vs); |
1384 |
} |
1385 |
|
1386 |
static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err) |
1387 |
{ |
1388 |
if (err == -1) { |
1389 |
err = -errno; |
1390 |
goto out;
|
1391 |
} |
1392 |
|
1393 |
if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
|
1394 |
struct timespec times[2]; |
1395 |
if (vs->v9iattr.valid & ATTR_ATIME) {
|
1396 |
if (vs->v9iattr.valid & ATTR_ATIME_SET) {
|
1397 |
times[0].tv_sec = vs->v9iattr.atime_sec;
|
1398 |
times[0].tv_nsec = vs->v9iattr.atime_nsec;
|
1399 |
} else {
|
1400 |
times[0].tv_nsec = UTIME_NOW;
|
1401 |
} |
1402 |
} else {
|
1403 |
times[0].tv_nsec = UTIME_OMIT;
|
1404 |
} |
1405 |
|
1406 |
if (vs->v9iattr.valid & ATTR_MTIME) {
|
1407 |
if (vs->v9iattr.valid & ATTR_MTIME_SET) {
|
1408 |
times[1].tv_sec = vs->v9iattr.mtime_sec;
|
1409 |
times[1].tv_nsec = vs->v9iattr.mtime_nsec;
|
1410 |
} else {
|
1411 |
times[1].tv_nsec = UTIME_NOW;
|
1412 |
} |
1413 |
} else {
|
1414 |
times[1].tv_nsec = UTIME_OMIT;
|
1415 |
} |
1416 |
err = v9fs_do_utimensat(s, &vs->fidp->path, times); |
1417 |
} |
1418 |
v9fs_setattr_post_utimensat(s, vs, err); |
1419 |
return;
|
1420 |
|
1421 |
out:
|
1422 |
complete_pdu(s, vs->pdu, err); |
1423 |
qemu_free(vs); |
1424 |
} |
1425 |
|
1426 |
static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu) |
1427 |
{ |
1428 |
int32_t fid; |
1429 |
V9fsSetattrState *vs; |
1430 |
int err = 0; |
1431 |
|
1432 |
vs = qemu_malloc(sizeof(*vs));
|
1433 |
vs->pdu = pdu; |
1434 |
vs->offset = 7;
|
1435 |
|
1436 |
pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr);
|
1437 |
|
1438 |
vs->fidp = lookup_fid(s, fid); |
1439 |
if (vs->fidp == NULL) { |
1440 |
err = -EINVAL; |
1441 |
goto out;
|
1442 |
} |
1443 |
|
1444 |
if (vs->v9iattr.valid & ATTR_MODE) {
|
1445 |
err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode); |
1446 |
} |
1447 |
|
1448 |
v9fs_setattr_post_chmod(s, vs, err); |
1449 |
return;
|
1450 |
|
1451 |
out:
|
1452 |
complete_pdu(s, vs->pdu, err); |
1453 |
qemu_free(vs); |
1454 |
} |
1455 |
|
1456 |
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1457 |
{ |
1458 |
complete_pdu(s, vs->pdu, err); |
1459 |
|
1460 |
if (vs->nwnames) {
|
1461 |
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1462 |
v9fs_string_free(&vs->wnames[vs->name_idx]); |
1463 |
} |
1464 |
|
1465 |
qemu_free(vs->wnames); |
1466 |
qemu_free(vs->qids); |
1467 |
} |
1468 |
} |
1469 |
|
1470 |
static void v9fs_walk_marshal(V9fsWalkState *vs) |
1471 |
{ |
1472 |
int i;
|
1473 |
vs->offset = 7;
|
1474 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
1475 |
|
1476 |
for (i = 0; i < vs->nwnames; i++) { |
1477 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
1478 |
} |
1479 |
} |
1480 |
|
1481 |
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1482 |
int err)
|
1483 |
{ |
1484 |
if (err == -1) { |
1485 |
free_fid(s, vs->newfidp->fid); |
1486 |
v9fs_string_free(&vs->path); |
1487 |
err = -ENOENT; |
1488 |
goto out;
|
1489 |
} |
1490 |
|
1491 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1492 |
|
1493 |
vs->name_idx++; |
1494 |
if (vs->name_idx < vs->nwnames) {
|
1495 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1496 |
vs->wnames[vs->name_idx].data); |
1497 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1498 |
|
1499 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1500 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1501 |
return;
|
1502 |
} |
1503 |
|
1504 |
v9fs_string_free(&vs->path); |
1505 |
v9fs_walk_marshal(vs); |
1506 |
err = vs->offset; |
1507 |
out:
|
1508 |
v9fs_walk_complete(s, vs, err); |
1509 |
} |
1510 |
|
1511 |
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1512 |
int err)
|
1513 |
{ |
1514 |
if (err == -1) { |
1515 |
v9fs_string_free(&vs->path); |
1516 |
err = -ENOENT; |
1517 |
goto out;
|
1518 |
} |
1519 |
|
1520 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1521 |
vs->name_idx++; |
1522 |
if (vs->name_idx < vs->nwnames) {
|
1523 |
|
1524 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1525 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1526 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1527 |
|
1528 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1529 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1530 |
return;
|
1531 |
} |
1532 |
|
1533 |
v9fs_string_free(&vs->path); |
1534 |
v9fs_walk_marshal(vs); |
1535 |
err = vs->offset; |
1536 |
out:
|
1537 |
v9fs_walk_complete(s, vs, err); |
1538 |
} |
1539 |
|
1540 |
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1541 |
{ |
1542 |
int32_t fid, newfid; |
1543 |
V9fsWalkState *vs; |
1544 |
int err = 0; |
1545 |
int i;
|
1546 |
|
1547 |
vs = qemu_malloc(sizeof(*vs));
|
1548 |
vs->pdu = pdu; |
1549 |
vs->wnames = NULL;
|
1550 |
vs->qids = NULL;
|
1551 |
vs->offset = 7;
|
1552 |
|
1553 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
1554 |
&newfid, &vs->nwnames); |
1555 |
|
1556 |
if (vs->nwnames) {
|
1557 |
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
1558 |
|
1559 |
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); |
1560 |
|
1561 |
for (i = 0; i < vs->nwnames; i++) { |
1562 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
1563 |
&vs->wnames[i]); |
1564 |
} |
1565 |
} |
1566 |
|
1567 |
vs->fidp = lookup_fid(s, fid); |
1568 |
if (vs->fidp == NULL) { |
1569 |
err = -ENOENT; |
1570 |
goto out;
|
1571 |
} |
1572 |
|
1573 |
/* FIXME: is this really valid? */
|
1574 |
if (fid == newfid) {
|
1575 |
|
1576 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
1577 |
v9fs_string_init(&vs->path); |
1578 |
vs->name_idx = 0;
|
1579 |
|
1580 |
if (vs->name_idx < vs->nwnames) {
|
1581 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1582 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1583 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1584 |
|
1585 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1586 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1587 |
return;
|
1588 |
} |
1589 |
} else {
|
1590 |
vs->newfidp = alloc_fid(s, newfid); |
1591 |
if (vs->newfidp == NULL) { |
1592 |
err = -EINVAL; |
1593 |
goto out;
|
1594 |
} |
1595 |
|
1596 |
vs->newfidp->uid = vs->fidp->uid; |
1597 |
v9fs_string_init(&vs->path); |
1598 |
vs->name_idx = 0;
|
1599 |
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); |
1600 |
|
1601 |
if (vs->name_idx < vs->nwnames) {
|
1602 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1603 |
vs->wnames[vs->name_idx].data); |
1604 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1605 |
|
1606 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1607 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1608 |
return;
|
1609 |
} |
1610 |
} |
1611 |
|
1612 |
v9fs_walk_marshal(vs); |
1613 |
err = vs->offset; |
1614 |
out:
|
1615 |
v9fs_walk_complete(s, vs, err); |
1616 |
} |
1617 |
|
1618 |
static int32_t get_iounit(V9fsState *s, V9fsString *name)
|
1619 |
{ |
1620 |
struct statfs stbuf;
|
1621 |
int32_t iounit = 0;
|
1622 |
|
1623 |
/*
|
1624 |
* iounit should be multiples of f_bsize (host filesystem block size
|
1625 |
* and as well as less than (client msize - P9_IOHDRSZ))
|
1626 |
*/
|
1627 |
if (!v9fs_do_statfs(s, name, &stbuf)) {
|
1628 |
iounit = stbuf.f_bsize; |
1629 |
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; |
1630 |
} |
1631 |
|
1632 |
if (!iounit) {
|
1633 |
iounit = s->msize - P9_IOHDRSZ; |
1634 |
} |
1635 |
return iounit;
|
1636 |
} |
1637 |
|
1638 |
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1639 |
{ |
1640 |
if (vs->fidp->fs.dir == NULL) { |
1641 |
err = -errno; |
1642 |
goto out;
|
1643 |
} |
1644 |
vs->fidp->fid_type = P9_FID_DIR; |
1645 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1646 |
err = vs->offset; |
1647 |
out:
|
1648 |
complete_pdu(s, vs->pdu, err); |
1649 |
qemu_free(vs); |
1650 |
|
1651 |
} |
1652 |
|
1653 |
static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1654 |
{ |
1655 |
int err;
|
1656 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
1657 |
err = vs->offset; |
1658 |
complete_pdu(s, vs->pdu, err); |
1659 |
qemu_free(vs); |
1660 |
} |
1661 |
|
1662 |
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1663 |
{ |
1664 |
if (vs->fidp->fs.fd == -1) { |
1665 |
err = -errno; |
1666 |
goto out;
|
1667 |
} |
1668 |
vs->fidp->fid_type = P9_FID_FILE; |
1669 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
1670 |
v9fs_open_post_getiounit(s, vs); |
1671 |
return;
|
1672 |
out:
|
1673 |
complete_pdu(s, vs->pdu, err); |
1674 |
qemu_free(vs); |
1675 |
} |
1676 |
|
1677 |
static inline int valid_flags(int flag) |
1678 |
{ |
1679 |
if (flag & O_NOCTTY || flag & O_NONBLOCK || flag & O_ASYNC ||
|
1680 |
flag & O_CLOEXEC) |
1681 |
return 0; |
1682 |
else
|
1683 |
return 1; |
1684 |
} |
1685 |
|
1686 |
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) |
1687 |
{ |
1688 |
int flags;
|
1689 |
|
1690 |
if (err) {
|
1691 |
err = -errno; |
1692 |
goto out;
|
1693 |
} |
1694 |
|
1695 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1696 |
|
1697 |
if (S_ISDIR(vs->stbuf.st_mode)) {
|
1698 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path); |
1699 |
v9fs_open_post_opendir(s, vs, err); |
1700 |
} else {
|
1701 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1702 |
if (!valid_flags(vs->mode)) {
|
1703 |
err = -EINVAL; |
1704 |
goto out;
|
1705 |
} |
1706 |
flags = vs->mode; |
1707 |
} else {
|
1708 |
flags = omode_to_uflags(vs->mode); |
1709 |
} |
1710 |
vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags); |
1711 |
v9fs_open_post_open(s, vs, err); |
1712 |
} |
1713 |
return;
|
1714 |
out:
|
1715 |
complete_pdu(s, vs->pdu, err); |
1716 |
qemu_free(vs); |
1717 |
} |
1718 |
|
1719 |
static void v9fs_open(V9fsState *s, V9fsPDU *pdu) |
1720 |
{ |
1721 |
int32_t fid; |
1722 |
V9fsOpenState *vs; |
1723 |
ssize_t err = 0;
|
1724 |
|
1725 |
vs = qemu_malloc(sizeof(*vs));
|
1726 |
vs->pdu = pdu; |
1727 |
vs->offset = 7;
|
1728 |
vs->mode = 0;
|
1729 |
|
1730 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1731 |
pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode);
|
1732 |
} else {
|
1733 |
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
1734 |
} |
1735 |
|
1736 |
vs->fidp = lookup_fid(s, fid); |
1737 |
if (vs->fidp == NULL) { |
1738 |
err = -ENOENT; |
1739 |
goto out;
|
1740 |
} |
1741 |
|
1742 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
1743 |
|
1744 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1745 |
|
1746 |
v9fs_open_post_lstat(s, vs, err); |
1747 |
return;
|
1748 |
out:
|
1749 |
complete_pdu(s, pdu, err); |
1750 |
qemu_free(vs); |
1751 |
} |
1752 |
|
1753 |
static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
1754 |
{ |
1755 |
if (err == 0) { |
1756 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
1757 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1758 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
|
1759 |
&vs->iounit); |
1760 |
err = vs->offset; |
1761 |
} else {
|
1762 |
vs->fidp->fid_type = P9_FID_NONE; |
1763 |
close(vs->fidp->fs.fd); |
1764 |
err = -errno; |
1765 |
} |
1766 |
|
1767 |
complete_pdu(s, vs->pdu, err); |
1768 |
v9fs_string_free(&vs->name); |
1769 |
v9fs_string_free(&vs->fullname); |
1770 |
qemu_free(vs); |
1771 |
} |
1772 |
|
1773 |
static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, |
1774 |
int err)
|
1775 |
{ |
1776 |
if (err) {
|
1777 |
err = -errno; |
1778 |
goto out;
|
1779 |
} |
1780 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
1781 |
|
1782 |
out:
|
1783 |
v9fs_post_lcreate(s, vs, err); |
1784 |
} |
1785 |
|
1786 |
static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, |
1787 |
int err)
|
1788 |
{ |
1789 |
if (vs->fidp->fs.fd == -1) { |
1790 |
err = -errno; |
1791 |
goto out;
|
1792 |
} |
1793 |
vs->fidp->fid_type = P9_FID_FILE; |
1794 |
vs->iounit = get_iounit(s, &vs->fullname); |
1795 |
v9fs_lcreate_post_get_iounit(s, vs, err); |
1796 |
return;
|
1797 |
|
1798 |
out:
|
1799 |
v9fs_post_lcreate(s, vs, err); |
1800 |
} |
1801 |
|
1802 |
static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu) |
1803 |
{ |
1804 |
int32_t dfid, flags, mode; |
1805 |
gid_t gid; |
1806 |
V9fsLcreateState *vs; |
1807 |
ssize_t err = 0;
|
1808 |
|
1809 |
vs = qemu_malloc(sizeof(*vs));
|
1810 |
vs->pdu = pdu; |
1811 |
vs->offset = 7;
|
1812 |
|
1813 |
v9fs_string_init(&vs->fullname); |
1814 |
|
1815 |
pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
|
1816 |
&mode, &gid); |
1817 |
|
1818 |
vs->fidp = lookup_fid(s, dfid); |
1819 |
if (vs->fidp == NULL) { |
1820 |
err = -ENOENT; |
1821 |
goto out;
|
1822 |
} |
1823 |
|
1824 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
1825 |
vs->name.data); |
1826 |
|
1827 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
1828 |
gid, flags, mode); |
1829 |
v9fs_lcreate_post_do_open2(s, vs, err); |
1830 |
return;
|
1831 |
|
1832 |
out:
|
1833 |
complete_pdu(s, vs->pdu, err); |
1834 |
v9fs_string_free(&vs->name); |
1835 |
qemu_free(vs); |
1836 |
} |
1837 |
|
1838 |
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
1839 |
{ |
1840 |
int32_t fid; |
1841 |
size_t offset = 7;
|
1842 |
int err;
|
1843 |
|
1844 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1845 |
|
1846 |
err = free_fid(s, fid); |
1847 |
if (err < 0) { |
1848 |
goto out;
|
1849 |
} |
1850 |
|
1851 |
offset = 7;
|
1852 |
err = offset; |
1853 |
out:
|
1854 |
complete_pdu(s, pdu, err); |
1855 |
} |
1856 |
|
1857 |
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1858 |
|
1859 |
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1860 |
{ |
1861 |
if (err) {
|
1862 |
goto out;
|
1863 |
} |
1864 |
v9fs_stat_free(&vs->v9stat); |
1865 |
v9fs_string_free(&vs->name); |
1866 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1867 |
vs->offset += vs->count; |
1868 |
err = vs->offset; |
1869 |
out:
|
1870 |
complete_pdu(s, vs->pdu, err); |
1871 |
qemu_free(vs); |
1872 |
return;
|
1873 |
} |
1874 |
|
1875 |
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, |
1876 |
ssize_t err) |
1877 |
{ |
1878 |
if (err) {
|
1879 |
err = -errno; |
1880 |
goto out;
|
1881 |
} |
1882 |
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); |
1883 |
if (err) {
|
1884 |
goto out;
|
1885 |
} |
1886 |
|
1887 |
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", |
1888 |
&vs->v9stat); |
1889 |
if ((vs->len != (vs->v9stat.size + 2)) || |
1890 |
((vs->count + vs->len) > vs->max_count)) { |
1891 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
1892 |
v9fs_read_post_seekdir(s, vs, err); |
1893 |
return;
|
1894 |
} |
1895 |
vs->count += vs->len; |
1896 |
v9fs_stat_free(&vs->v9stat); |
1897 |
v9fs_string_free(&vs->name); |
1898 |
vs->dir_pos = vs->dent->d_off; |
1899 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
1900 |
v9fs_read_post_readdir(s, vs, err); |
1901 |
return;
|
1902 |
out:
|
1903 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
1904 |
v9fs_read_post_seekdir(s, vs, err); |
1905 |
return;
|
1906 |
|
1907 |
} |
1908 |
|
1909 |
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1910 |
{ |
1911 |
if (vs->dent) {
|
1912 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1913 |
v9fs_string_init(&vs->name); |
1914 |
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
1915 |
vs->dent->d_name); |
1916 |
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); |
1917 |
v9fs_read_post_dir_lstat(s, vs, err); |
1918 |
return;
|
1919 |
} |
1920 |
|
1921 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1922 |
vs->offset += vs->count; |
1923 |
err = vs->offset; |
1924 |
complete_pdu(s, vs->pdu, err); |
1925 |
qemu_free(vs); |
1926 |
return;
|
1927 |
} |
1928 |
|
1929 |
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1930 |
{ |
1931 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
1932 |
v9fs_read_post_readdir(s, vs, err); |
1933 |
return;
|
1934 |
} |
1935 |
|
1936 |
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, |
1937 |
ssize_t err) |
1938 |
{ |
1939 |
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
1940 |
v9fs_read_post_telldir(s, vs, err); |
1941 |
return;
|
1942 |
} |
1943 |
|
1944 |
static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1945 |
{ |
1946 |
if (err < 0) { |
1947 |
/* IO error return the error */
|
1948 |
err = -errno; |
1949 |
goto out;
|
1950 |
} |
1951 |
vs->total += vs->len; |
1952 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
1953 |
if (vs->total < vs->count && vs->len > 0) { |
1954 |
do {
|
1955 |
if (0) { |
1956 |
print_sg(vs->sg, vs->cnt); |
1957 |
} |
1958 |
vs->len = v9fs_do_readv(s, vs->fidp->fs.fd, vs->sg, vs->cnt); |
1959 |
} while (vs->len == -1 && errno == EINTR); |
1960 |
if (vs->len == -1) { |
1961 |
err = -errno; |
1962 |
} |
1963 |
v9fs_read_post_readv(s, vs, err); |
1964 |
return;
|
1965 |
} |
1966 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
1967 |
vs->offset += vs->count; |
1968 |
err = vs->offset; |
1969 |
|
1970 |
out:
|
1971 |
complete_pdu(s, vs->pdu, err); |
1972 |
qemu_free(vs); |
1973 |
} |
1974 |
|
1975 |
static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1976 |
{ |
1977 |
if (err == -1) { |
1978 |
err = -errno; |
1979 |
goto out;
|
1980 |
} |
1981 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1982 |
|
1983 |
if (vs->total < vs->count) {
|
1984 |
do {
|
1985 |
if (0) { |
1986 |
print_sg(vs->sg, vs->cnt); |
1987 |
} |
1988 |
vs->len = v9fs_do_readv(s, vs->fidp->fs.fd, vs->sg, vs->cnt); |
1989 |
} while (vs->len == -1 && errno == EINTR); |
1990 |
if (vs->len == -1) { |
1991 |
err = -errno; |
1992 |
} |
1993 |
v9fs_read_post_readv(s, vs, err); |
1994 |
return;
|
1995 |
} |
1996 |
out:
|
1997 |
complete_pdu(s, vs->pdu, err); |
1998 |
qemu_free(vs); |
1999 |
} |
2000 |
|
2001 |
static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
2002 |
{ |
2003 |
ssize_t err = 0;
|
2004 |
int read_count;
|
2005 |
int64_t xattr_len; |
2006 |
|
2007 |
xattr_len = vs->fidp->fs.xattr.len; |
2008 |
read_count = xattr_len - vs->off; |
2009 |
if (read_count > vs->count) {
|
2010 |
read_count = vs->count; |
2011 |
} else if (read_count < 0) { |
2012 |
/*
|
2013 |
* read beyond XATTR value
|
2014 |
*/
|
2015 |
read_count = 0;
|
2016 |
} |
2017 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
|
2018 |
vs->offset += pdu_pack(vs->pdu, vs->offset, |
2019 |
((char *)vs->fidp->fs.xattr.value) + vs->off,
|
2020 |
read_count); |
2021 |
err = vs->offset; |
2022 |
complete_pdu(s, vs->pdu, err); |
2023 |
qemu_free(vs); |
2024 |
} |
2025 |
|
2026 |
static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
2027 |
{ |
2028 |
int32_t fid; |
2029 |
V9fsReadState *vs; |
2030 |
ssize_t err = 0;
|
2031 |
|
2032 |
vs = qemu_malloc(sizeof(*vs));
|
2033 |
vs->pdu = pdu; |
2034 |
vs->offset = 7;
|
2035 |
vs->total = 0;
|
2036 |
vs->len = 0;
|
2037 |
vs->count = 0;
|
2038 |
|
2039 |
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
2040 |
|
2041 |
vs->fidp = lookup_fid(s, fid); |
2042 |
if (vs->fidp == NULL) { |
2043 |
err = -EINVAL; |
2044 |
goto out;
|
2045 |
} |
2046 |
|
2047 |
if (vs->fidp->fid_type == P9_FID_DIR) {
|
2048 |
vs->max_count = vs->count; |
2049 |
vs->count = 0;
|
2050 |
if (vs->off == 0) { |
2051 |
v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
2052 |
} |
2053 |
v9fs_read_post_rewinddir(s, vs, err); |
2054 |
return;
|
2055 |
} else if (vs->fidp->fid_type == P9_FID_FILE) { |
2056 |
vs->sg = vs->iov; |
2057 |
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); |
2058 |
err = v9fs_do_lseek(s, vs->fidp->fs.fd, vs->off, SEEK_SET); |
2059 |
v9fs_read_post_lseek(s, vs, err); |
2060 |
return;
|
2061 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2062 |
v9fs_xattr_read(s, vs); |
2063 |
return;
|
2064 |
} else {
|
2065 |
err = -EINVAL; |
2066 |
} |
2067 |
out:
|
2068 |
complete_pdu(s, pdu, err); |
2069 |
qemu_free(vs); |
2070 |
} |
2071 |
|
2072 |
typedef struct V9fsReadDirState { |
2073 |
V9fsPDU *pdu; |
2074 |
V9fsFidState *fidp; |
2075 |
V9fsQID qid; |
2076 |
off_t saved_dir_pos; |
2077 |
struct dirent *dent;
|
2078 |
int32_t count; |
2079 |
int32_t max_count; |
2080 |
size_t offset; |
2081 |
int64_t initial_offset; |
2082 |
V9fsString name; |
2083 |
} V9fsReadDirState; |
2084 |
|
2085 |
static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs) |
2086 |
{ |
2087 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
2088 |
vs->offset += vs->count; |
2089 |
complete_pdu(s, vs->pdu, vs->offset); |
2090 |
qemu_free(vs); |
2091 |
return;
|
2092 |
} |
2093 |
|
2094 |
/* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
2095 |
* size of type (1) + size of name.size (2) + strlen(name.data)
|
2096 |
*/
|
2097 |
#define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data)) |
2098 |
|
2099 |
static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs) |
2100 |
{ |
2101 |
int len;
|
2102 |
size_t size; |
2103 |
|
2104 |
if (vs->dent) {
|
2105 |
v9fs_string_init(&vs->name); |
2106 |
v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name);
|
2107 |
|
2108 |
if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
|
2109 |
/* Ran out of buffer. Set dir back to old position and return */
|
2110 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos); |
2111 |
v9fs_readdir_post_seekdir(s, vs); |
2112 |
return;
|
2113 |
} |
2114 |
|
2115 |
/* Fill up just the path field of qid because the client uses
|
2116 |
* only that. To fill the entire qid structure we will have
|
2117 |
* to stat each dirent found, which is expensive
|
2118 |
*/
|
2119 |
size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path)); |
2120 |
memcpy(&vs->qid.path, &vs->dent->d_ino, size); |
2121 |
/* Fill the other fields with dummy values */
|
2122 |
vs->qid.type = 0;
|
2123 |
vs->qid.version = 0;
|
2124 |
|
2125 |
len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs", |
2126 |
&vs->qid, vs->dent->d_off, |
2127 |
vs->dent->d_type, &vs->name); |
2128 |
vs->count += len; |
2129 |
v9fs_string_free(&vs->name); |
2130 |
vs->saved_dir_pos = vs->dent->d_off; |
2131 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
2132 |
v9fs_readdir_post_readdir(s, vs); |
2133 |
return;
|
2134 |
} |
2135 |
|
2136 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
2137 |
vs->offset += vs->count; |
2138 |
complete_pdu(s, vs->pdu, vs->offset); |
2139 |
qemu_free(vs); |
2140 |
return;
|
2141 |
} |
2142 |
|
2143 |
static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs) |
2144 |
{ |
2145 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
2146 |
v9fs_readdir_post_readdir(s, vs); |
2147 |
return;
|
2148 |
} |
2149 |
|
2150 |
static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs) |
2151 |
{ |
2152 |
vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
2153 |
v9fs_readdir_post_telldir(s, vs); |
2154 |
return;
|
2155 |
} |
2156 |
|
2157 |
static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu) |
2158 |
{ |
2159 |
int32_t fid; |
2160 |
V9fsReadDirState *vs; |
2161 |
ssize_t err = 0;
|
2162 |
size_t offset = 7;
|
2163 |
|
2164 |
vs = qemu_malloc(sizeof(*vs));
|
2165 |
vs->pdu = pdu; |
2166 |
vs->offset = 7;
|
2167 |
vs->count = 0;
|
2168 |
|
2169 |
pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset,
|
2170 |
&vs->max_count); |
2171 |
|
2172 |
vs->fidp = lookup_fid(s, fid); |
2173 |
if (vs->fidp == NULL || !(vs->fidp->fs.dir)) { |
2174 |
err = -EINVAL; |
2175 |
goto out;
|
2176 |
} |
2177 |
|
2178 |
if (vs->initial_offset == 0) { |
2179 |
v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
2180 |
} else {
|
2181 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset); |
2182 |
} |
2183 |
|
2184 |
v9fs_readdir_post_setdir(s, vs); |
2185 |
return;
|
2186 |
|
2187 |
out:
|
2188 |
complete_pdu(s, pdu, err); |
2189 |
qemu_free(vs); |
2190 |
return;
|
2191 |
} |
2192 |
|
2193 |
static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, |
2194 |
ssize_t err) |
2195 |
{ |
2196 |
if (err < 0) { |
2197 |
/* IO error return the error */
|
2198 |
err = -errno; |
2199 |
goto out;
|
2200 |
} |
2201 |
vs->total += vs->len; |
2202 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
2203 |
if (vs->total < vs->count && vs->len > 0) { |
2204 |
do {
|
2205 |
if (0) { |
2206 |
print_sg(vs->sg, vs->cnt); |
2207 |
} |
2208 |
vs->len = v9fs_do_writev(s, vs->fidp->fs.fd, vs->sg, vs->cnt); |
2209 |
} while (vs->len == -1 && errno == EINTR); |
2210 |
if (vs->len == -1) { |
2211 |
err = -errno; |
2212 |
} |
2213 |
v9fs_write_post_writev(s, vs, err); |
2214 |
return;
|
2215 |
} |
2216 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
2217 |
|
2218 |
err = vs->offset; |
2219 |
out:
|
2220 |
complete_pdu(s, vs->pdu, err); |
2221 |
qemu_free(vs); |
2222 |
} |
2223 |
|
2224 |
static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) |
2225 |
{ |
2226 |
if (err == -1) { |
2227 |
err = -errno; |
2228 |
goto out;
|
2229 |
} |
2230 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2231 |
|
2232 |
if (vs->total < vs->count) {
|
2233 |
do {
|
2234 |
if (0) { |
2235 |
print_sg(vs->sg, vs->cnt); |
2236 |
} |
2237 |
vs->len = v9fs_do_writev(s, vs->fidp->fs.fd, vs->sg, vs->cnt); |
2238 |
} while (vs->len == -1 && errno == EINTR); |
2239 |
if (vs->len == -1) { |
2240 |
err = -errno; |
2241 |
} |
2242 |
v9fs_write_post_writev(s, vs, err); |
2243 |
return;
|
2244 |
} |
2245 |
|
2246 |
out:
|
2247 |
complete_pdu(s, vs->pdu, err); |
2248 |
qemu_free(vs); |
2249 |
} |
2250 |
|
2251 |
static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
2252 |
{ |
2253 |
int i, to_copy;
|
2254 |
ssize_t err = 0;
|
2255 |
int write_count;
|
2256 |
int64_t xattr_len; |
2257 |
|
2258 |
xattr_len = vs->fidp->fs.xattr.len; |
2259 |
write_count = xattr_len - vs->off; |
2260 |
if (write_count > vs->count) {
|
2261 |
write_count = vs->count; |
2262 |
} else if (write_count < 0) { |
2263 |
/*
|
2264 |
* write beyond XATTR value len specified in
|
2265 |
* xattrcreate
|
2266 |
*/
|
2267 |
err = -ENOSPC; |
2268 |
goto out;
|
2269 |
} |
2270 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count);
|
2271 |
err = vs->offset; |
2272 |
vs->fidp->fs.xattr.copied_len += write_count; |
2273 |
/*
|
2274 |
* Now copy the content from sg list
|
2275 |
*/
|
2276 |
for (i = 0; i < vs->cnt; i++) { |
2277 |
if (write_count > vs->sg[i].iov_len) {
|
2278 |
to_copy = vs->sg[i].iov_len; |
2279 |
} else {
|
2280 |
to_copy = write_count; |
2281 |
} |
2282 |
memcpy((char *)vs->fidp->fs.xattr.value + vs->off,
|
2283 |
vs->sg[i].iov_base, to_copy); |
2284 |
/* updating vs->off since we are not using below */
|
2285 |
vs->off += to_copy; |
2286 |
write_count -= to_copy; |
2287 |
} |
2288 |
out:
|
2289 |
complete_pdu(s, vs->pdu, err); |
2290 |
qemu_free(vs); |
2291 |
} |
2292 |
|
2293 |
static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
2294 |
{ |
2295 |
int32_t fid; |
2296 |
V9fsWriteState *vs; |
2297 |
ssize_t err; |
2298 |
|
2299 |
vs = qemu_malloc(sizeof(*vs));
|
2300 |
|
2301 |
vs->pdu = pdu; |
2302 |
vs->offset = 7;
|
2303 |
vs->sg = vs->iov; |
2304 |
vs->total = 0;
|
2305 |
vs->len = 0;
|
2306 |
|
2307 |
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
2308 |
vs->sg, &vs->cnt); |
2309 |
|
2310 |
vs->fidp = lookup_fid(s, fid); |
2311 |
if (vs->fidp == NULL) { |
2312 |
err = -EINVAL; |
2313 |
goto out;
|
2314 |
} |
2315 |
|
2316 |
if (vs->fidp->fid_type == P9_FID_FILE) {
|
2317 |
if (vs->fidp->fs.fd == -1) { |
2318 |
err = -EINVAL; |
2319 |
goto out;
|
2320 |
} |
2321 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2322 |
/*
|
2323 |
* setxattr operation
|
2324 |
*/
|
2325 |
v9fs_xattr_write(s, vs); |
2326 |
return;
|
2327 |
} else {
|
2328 |
err = -EINVAL; |
2329 |
goto out;
|
2330 |
} |
2331 |
err = v9fs_do_lseek(s, vs->fidp->fs.fd, vs->off, SEEK_SET); |
2332 |
|
2333 |
v9fs_write_post_lseek(s, vs, err); |
2334 |
return;
|
2335 |
|
2336 |
out:
|
2337 |
complete_pdu(s, vs->pdu, err); |
2338 |
qemu_free(vs); |
2339 |
} |
2340 |
|
2341 |
static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
2342 |
{ |
2343 |
int err;
|
2344 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
2345 |
stat_to_qid(&vs->stbuf, &vs->qid); |
2346 |
|
2347 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
2348 |
err = vs->offset; |
2349 |
|
2350 |
complete_pdu(s, vs->pdu, err); |
2351 |
v9fs_string_free(&vs->name); |
2352 |
v9fs_string_free(&vs->extension); |
2353 |
v9fs_string_free(&vs->fullname); |
2354 |
qemu_free(vs); |
2355 |
} |
2356 |
|
2357 |
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
2358 |
{ |
2359 |
if (err == 0) { |
2360 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
2361 |
v9fs_create_post_getiounit(s, vs); |
2362 |
return;
|
2363 |
} |
2364 |
|
2365 |
complete_pdu(s, vs->pdu, err); |
2366 |
v9fs_string_free(&vs->name); |
2367 |
v9fs_string_free(&vs->extension); |
2368 |
v9fs_string_free(&vs->fullname); |
2369 |
qemu_free(vs); |
2370 |
} |
2371 |
|
2372 |
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) |
2373 |
{ |
2374 |
if (err) {
|
2375 |
err = -errno; |
2376 |
} |
2377 |
v9fs_post_create(s, vs, err); |
2378 |
} |
2379 |
|
2380 |
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, |
2381 |
int err)
|
2382 |
{ |
2383 |
if (!vs->fidp->fs.dir) {
|
2384 |
err = -errno; |
2385 |
} |
2386 |
vs->fidp->fid_type = P9_FID_DIR; |
2387 |
v9fs_post_create(s, vs, err); |
2388 |
} |
2389 |
|
2390 |
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, |
2391 |
int err)
|
2392 |
{ |
2393 |
if (err) {
|
2394 |
err = -errno; |
2395 |
goto out;
|
2396 |
} |
2397 |
|
2398 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname); |
2399 |
v9fs_create_post_opendir(s, vs, err); |
2400 |
return;
|
2401 |
|
2402 |
out:
|
2403 |
v9fs_post_create(s, vs, err); |
2404 |
} |
2405 |
|
2406 |
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) |
2407 |
{ |
2408 |
if (err) {
|
2409 |
err = -errno; |
2410 |
goto out;
|
2411 |
} |
2412 |
|
2413 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2414 |
v9fs_create_post_dir_lstat(s, vs, err); |
2415 |
return;
|
2416 |
|
2417 |
out:
|
2418 |
v9fs_post_create(s, vs, err); |
2419 |
} |
2420 |
|
2421 |
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2422 |
{ |
2423 |
if (err) {
|
2424 |
vs->fidp->fid_type = P9_FID_NONE; |
2425 |
close(vs->fidp->fs.fd); |
2426 |
err = -errno; |
2427 |
} |
2428 |
v9fs_post_create(s, vs, err); |
2429 |
return;
|
2430 |
} |
2431 |
|
2432 |
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) |
2433 |
{ |
2434 |
if (vs->fidp->fs.fd == -1) { |
2435 |
err = -errno; |
2436 |
goto out;
|
2437 |
} |
2438 |
vs->fidp->fid_type = P9_FID_FILE; |
2439 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
2440 |
v9fs_create_post_fstat(s, vs, err); |
2441 |
|
2442 |
return;
|
2443 |
|
2444 |
out:
|
2445 |
v9fs_post_create(s, vs, err); |
2446 |
|
2447 |
} |
2448 |
|
2449 |
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) |
2450 |
{ |
2451 |
|
2452 |
if (err == 0 || errno != ENOENT) { |
2453 |
err = -errno; |
2454 |
goto out;
|
2455 |
} |
2456 |
|
2457 |
if (vs->perm & P9_STAT_MODE_DIR) {
|
2458 |
err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777,
|
2459 |
vs->fidp->uid, -1);
|
2460 |
v9fs_create_post_mkdir(s, vs, err); |
2461 |
} else if (vs->perm & P9_STAT_MODE_SYMLINK) { |
2462 |
err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
2463 |
vs->fullname.data, -1);
|
2464 |
v9fs_create_post_perms(s, vs, err); |
2465 |
} else if (vs->perm & P9_STAT_MODE_LINK) { |
2466 |
int32_t nfid = atoi(vs->extension.data); |
2467 |
V9fsFidState *nfidp = lookup_fid(s, nfid); |
2468 |
if (nfidp == NULL) { |
2469 |
err = -errno; |
2470 |
v9fs_post_create(s, vs, err); |
2471 |
} |
2472 |
err = v9fs_do_link(s, &nfidp->path, &vs->fullname); |
2473 |
v9fs_create_post_perms(s, vs, err); |
2474 |
} else if (vs->perm & P9_STAT_MODE_DEVICE) { |
2475 |
char ctype;
|
2476 |
uint32_t major, minor; |
2477 |
mode_t nmode = 0;
|
2478 |
|
2479 |
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, |
2480 |
&minor) != 3) {
|
2481 |
err = -errno; |
2482 |
v9fs_post_create(s, vs, err); |
2483 |
} |
2484 |
|
2485 |
switch (ctype) {
|
2486 |
case 'c': |
2487 |
nmode = S_IFCHR; |
2488 |
break;
|
2489 |
case 'b': |
2490 |
nmode = S_IFBLK; |
2491 |
break;
|
2492 |
default:
|
2493 |
err = -EIO; |
2494 |
v9fs_post_create(s, vs, err); |
2495 |
} |
2496 |
|
2497 |
nmode |= vs->perm & 0777;
|
2498 |
err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
2499 |
makedev(major, minor), vs->fidp->uid, -1);
|
2500 |
v9fs_create_post_perms(s, vs, err); |
2501 |
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { |
2502 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
|
2503 |
0, vs->fidp->uid, -1); |
2504 |
v9fs_post_create(s, vs, err); |
2505 |
} else if (vs->perm & P9_STAT_MODE_SOCKET) { |
2506 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
|
2507 |
0, vs->fidp->uid, -1); |
2508 |
v9fs_post_create(s, vs, err); |
2509 |
} else {
|
2510 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
2511 |
-1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
|
2512 |
|
2513 |
v9fs_create_post_open2(s, vs, err); |
2514 |
} |
2515 |
|
2516 |
return;
|
2517 |
|
2518 |
out:
|
2519 |
v9fs_post_create(s, vs, err); |
2520 |
} |
2521 |
|
2522 |
static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
2523 |
{ |
2524 |
int32_t fid; |
2525 |
V9fsCreateState *vs; |
2526 |
int err = 0; |
2527 |
|
2528 |
vs = qemu_malloc(sizeof(*vs));
|
2529 |
vs->pdu = pdu; |
2530 |
vs->offset = 7;
|
2531 |
|
2532 |
v9fs_string_init(&vs->fullname); |
2533 |
|
2534 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
2535 |
&vs->perm, &vs->mode, &vs->extension); |
2536 |
|
2537 |
vs->fidp = lookup_fid(s, fid); |
2538 |
if (vs->fidp == NULL) { |
2539 |
err = -EINVAL; |
2540 |
goto out;
|
2541 |
} |
2542 |
|
2543 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
2544 |
vs->name.data); |
2545 |
|
2546 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2547 |
v9fs_create_post_lstat(s, vs, err); |
2548 |
return;
|
2549 |
|
2550 |
out:
|
2551 |
complete_pdu(s, vs->pdu, err); |
2552 |
v9fs_string_free(&vs->name); |
2553 |
v9fs_string_free(&vs->extension); |
2554 |
qemu_free(vs); |
2555 |
} |
2556 |
|
2557 |
static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
2558 |
{ |
2559 |
if (err == 0) { |
2560 |
stat_to_qid(&vs->stbuf, &vs->qid); |
2561 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
2562 |
err = vs->offset; |
2563 |
} else {
|
2564 |
err = -errno; |
2565 |
} |
2566 |
complete_pdu(s, vs->pdu, err); |
2567 |
v9fs_string_free(&vs->name); |
2568 |
v9fs_string_free(&vs->symname); |
2569 |
v9fs_string_free(&vs->fullname); |
2570 |
qemu_free(vs); |
2571 |
} |
2572 |
|
2573 |
static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, |
2574 |
int err)
|
2575 |
{ |
2576 |
if (err) {
|
2577 |
goto out;
|
2578 |
} |
2579 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2580 |
out:
|
2581 |
v9fs_post_symlink(s, vs, err); |
2582 |
} |
2583 |
|
2584 |
static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu) |
2585 |
{ |
2586 |
int32_t dfid; |
2587 |
V9fsSymlinkState *vs; |
2588 |
int err = 0; |
2589 |
gid_t gid; |
2590 |
|
2591 |
vs = qemu_malloc(sizeof(*vs));
|
2592 |
vs->pdu = pdu; |
2593 |
vs->offset = 7;
|
2594 |
|
2595 |
v9fs_string_init(&vs->fullname); |
2596 |
|
2597 |
pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
|
2598 |
&vs->symname, &gid); |
2599 |
|
2600 |
vs->dfidp = lookup_fid(s, dfid); |
2601 |
if (vs->dfidp == NULL) { |
2602 |
err = -EINVAL; |
2603 |
goto out;
|
2604 |
} |
2605 |
|
2606 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
|
2607 |
vs->name.data); |
2608 |
err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, |
2609 |
vs->fullname.data, gid); |
2610 |
v9fs_symlink_post_do_symlink(s, vs, err); |
2611 |
return;
|
2612 |
|
2613 |
out:
|
2614 |
complete_pdu(s, vs->pdu, err); |
2615 |
v9fs_string_free(&vs->name); |
2616 |
v9fs_string_free(&vs->symname); |
2617 |
qemu_free(vs); |
2618 |
} |
2619 |
|
2620 |
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
2621 |
{ |
2622 |
/* A nop call with no return */
|
2623 |
complete_pdu(s, pdu, 7);
|
2624 |
} |
2625 |
|
2626 |
static void v9fs_link(V9fsState *s, V9fsPDU *pdu) |
2627 |
{ |
2628 |
int32_t dfid, oldfid; |
2629 |
V9fsFidState *dfidp, *oldfidp; |
2630 |
V9fsString name, fullname; |
2631 |
size_t offset = 7;
|
2632 |
int err = 0; |
2633 |
|
2634 |
v9fs_string_init(&fullname); |
2635 |
|
2636 |
pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
|
2637 |
|
2638 |
dfidp = lookup_fid(s, dfid); |
2639 |
if (dfidp == NULL) { |
2640 |
err = -errno; |
2641 |
goto out;
|
2642 |
} |
2643 |
|
2644 |
oldfidp = lookup_fid(s, oldfid); |
2645 |
if (oldfidp == NULL) { |
2646 |
err = -errno; |
2647 |
goto out;
|
2648 |
} |
2649 |
|
2650 |
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
|
2651 |
err = offset; |
2652 |
err = v9fs_do_link(s, &oldfidp->path, &fullname); |
2653 |
if (err) {
|
2654 |
err = -errno; |
2655 |
} |
2656 |
v9fs_string_free(&fullname); |
2657 |
|
2658 |
out:
|
2659 |
v9fs_string_free(&name); |
2660 |
complete_pdu(s, pdu, err); |
2661 |
} |
2662 |
|
2663 |
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
2664 |
int err)
|
2665 |
{ |
2666 |
if (err < 0) { |
2667 |
err = -errno; |
2668 |
} else {
|
2669 |
err = vs->offset; |
2670 |
} |
2671 |
|
2672 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
2673 |
free_fid(s, vs->fidp->fid); |
2674 |
|
2675 |
complete_pdu(s, vs->pdu, err); |
2676 |
qemu_free(vs); |
2677 |
} |
2678 |
|
2679 |
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
2680 |
{ |
2681 |
int32_t fid; |
2682 |
V9fsRemoveState *vs; |
2683 |
int err = 0; |
2684 |
|
2685 |
vs = qemu_malloc(sizeof(*vs));
|
2686 |
vs->pdu = pdu; |
2687 |
vs->offset = 7;
|
2688 |
|
2689 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
2690 |
|
2691 |
vs->fidp = lookup_fid(s, fid); |
2692 |
if (vs->fidp == NULL) { |
2693 |
err = -EINVAL; |
2694 |
goto out;
|
2695 |
} |
2696 |
|
2697 |
err = v9fs_do_remove(s, &vs->fidp->path); |
2698 |
v9fs_remove_post_remove(s, vs, err); |
2699 |
return;
|
2700 |
|
2701 |
out:
|
2702 |
complete_pdu(s, pdu, err); |
2703 |
qemu_free(vs); |
2704 |
} |
2705 |
|
2706 |
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2707 |
{ |
2708 |
if (err < 0) { |
2709 |
goto out;
|
2710 |
} |
2711 |
|
2712 |
err = vs->offset; |
2713 |
|
2714 |
out:
|
2715 |
v9fs_stat_free(&vs->v9stat); |
2716 |
complete_pdu(s, vs->pdu, err); |
2717 |
qemu_free(vs); |
2718 |
} |
2719 |
|
2720 |
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) |
2721 |
{ |
2722 |
if (err < 0) { |
2723 |
goto out;
|
2724 |
} |
2725 |
if (vs->v9stat.length != -1) { |
2726 |
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { |
2727 |
err = -errno; |
2728 |
} |
2729 |
} |
2730 |
v9fs_wstat_post_truncate(s, vs, err); |
2731 |
return;
|
2732 |
|
2733 |
out:
|
2734 |
v9fs_stat_free(&vs->v9stat); |
2735 |
complete_pdu(s, vs->pdu, err); |
2736 |
qemu_free(vs); |
2737 |
} |
2738 |
|
2739 |
static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs) |
2740 |
{ |
2741 |
int err = 0; |
2742 |
char *old_name, *new_name;
|
2743 |
char *end;
|
2744 |
|
2745 |
if (vs->newdirfid != -1) { |
2746 |
V9fsFidState *dirfidp; |
2747 |
dirfidp = lookup_fid(s, vs->newdirfid); |
2748 |
|
2749 |
if (dirfidp == NULL) { |
2750 |
err = -ENOENT; |
2751 |
goto out;
|
2752 |
} |
2753 |
|
2754 |
BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
2755 |
|
2756 |
new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2);
|
2757 |
|
2758 |
strcpy(new_name, dirfidp->path.data); |
2759 |
strcat(new_name, "/");
|
2760 |
strcat(new_name + dirfidp->path.size, vs->name.data); |
2761 |
} else {
|
2762 |
old_name = vs->fidp->path.data; |
2763 |
end = strrchr(old_name, '/');
|
2764 |
if (end) {
|
2765 |
end++; |
2766 |
} else {
|
2767 |
end = old_name; |
2768 |
} |
2769 |
new_name = qemu_mallocz(end - old_name + vs->name.size + 1);
|
2770 |
|
2771 |
strncat(new_name, old_name, end - old_name); |
2772 |
strncat(new_name + (end - old_name), vs->name.data, vs->name.size); |
2773 |
} |
2774 |
|
2775 |
v9fs_string_free(&vs->name); |
2776 |
vs->name.data = qemu_strdup(new_name); |
2777 |
vs->name.size = strlen(new_name); |
2778 |
|
2779 |
if (strcmp(new_name, vs->fidp->path.data) != 0) { |
2780 |
if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) {
|
2781 |
err = -errno; |
2782 |
} else {
|
2783 |
V9fsFidState *fidp; |
2784 |
/*
|
2785 |
* Fixup fid's pointing to the old name to
|
2786 |
* start pointing to the new name
|
2787 |
*/
|
2788 |
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
2789 |
if (vs->fidp == fidp) {
|
2790 |
/*
|
2791 |
* we replace name of this fid towards the end
|
2792 |
* so that our below strcmp will work
|
2793 |
*/
|
2794 |
continue;
|
2795 |
} |
2796 |
if (!strncmp(vs->fidp->path.data, fidp->path.data,
|
2797 |
strlen(vs->fidp->path.data))) { |
2798 |
/* replace the name */
|
2799 |
v9fs_fix_path(&fidp->path, &vs->name, |
2800 |
strlen(vs->fidp->path.data)); |
2801 |
} |
2802 |
} |
2803 |
v9fs_string_copy(&vs->fidp->path, &vs->name); |
2804 |
} |
2805 |
} |
2806 |
out:
|
2807 |
v9fs_string_free(&vs->name); |
2808 |
return err;
|
2809 |
} |
2810 |
|
2811 |
static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err) |
2812 |
{ |
2813 |
complete_pdu(s, vs->pdu, err); |
2814 |
qemu_free(vs); |
2815 |
} |
2816 |
|
2817 |
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
2818 |
{ |
2819 |
if (err < 0) { |
2820 |
goto out;
|
2821 |
} |
2822 |
|
2823 |
if (vs->v9stat.name.size != 0) { |
2824 |
V9fsRenameState *vr; |
2825 |
|
2826 |
vr = qemu_malloc(sizeof(V9fsRenameState));
|
2827 |
memset(vr, sizeof(*vr), 0); |
2828 |
vr->newdirfid = -1;
|
2829 |
vr->pdu = vs->pdu; |
2830 |
vr->fidp = vs->fidp; |
2831 |
vr->offset = vs->offset; |
2832 |
vr->name.size = vs->v9stat.name.size; |
2833 |
vr->name.data = qemu_strdup(vs->v9stat.name.data); |
2834 |
|
2835 |
err = v9fs_complete_rename(s, vr); |
2836 |
qemu_free(vr); |
2837 |
} |
2838 |
v9fs_wstat_post_rename(s, vs, err); |
2839 |
return;
|
2840 |
|
2841 |
out:
|
2842 |
v9fs_stat_free(&vs->v9stat); |
2843 |
complete_pdu(s, vs->pdu, err); |
2844 |
qemu_free(vs); |
2845 |
} |
2846 |
|
2847 |
static void v9fs_rename(V9fsState *s, V9fsPDU *pdu) |
2848 |
{ |
2849 |
int32_t fid; |
2850 |
V9fsRenameState *vs; |
2851 |
ssize_t err = 0;
|
2852 |
|
2853 |
vs = qemu_malloc(sizeof(*vs));
|
2854 |
vs->pdu = pdu; |
2855 |
vs->offset = 7;
|
2856 |
|
2857 |
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name);
|
2858 |
|
2859 |
vs->fidp = lookup_fid(s, fid); |
2860 |
if (vs->fidp == NULL) { |
2861 |
err = -ENOENT; |
2862 |
goto out;
|
2863 |
} |
2864 |
|
2865 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
2866 |
|
2867 |
err = v9fs_complete_rename(s, vs); |
2868 |
v9fs_rename_post_rename(s, vs, err); |
2869 |
return;
|
2870 |
out:
|
2871 |
complete_pdu(s, vs->pdu, err); |
2872 |
qemu_free(vs); |
2873 |
} |
2874 |
|
2875 |
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2876 |
{ |
2877 |
if (err < 0) { |
2878 |
goto out;
|
2879 |
} |
2880 |
|
2881 |
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
2882 |
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
2883 |
vs->v9stat.n_gid)) { |
2884 |
err = -errno; |
2885 |
} |
2886 |
} |
2887 |
v9fs_wstat_post_chown(s, vs, err); |
2888 |
return;
|
2889 |
|
2890 |
out:
|
2891 |
v9fs_stat_free(&vs->v9stat); |
2892 |
complete_pdu(s, vs->pdu, err); |
2893 |
qemu_free(vs); |
2894 |
} |
2895 |
|
2896 |
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) |
2897 |
{ |
2898 |
if (err < 0) { |
2899 |
goto out;
|
2900 |
} |
2901 |
|
2902 |
if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
2903 |
struct timespec times[2]; |
2904 |
if (vs->v9stat.atime != -1) { |
2905 |
times[0].tv_sec = vs->v9stat.atime;
|
2906 |
times[0].tv_nsec = 0; |
2907 |
} else {
|
2908 |
times[0].tv_nsec = UTIME_OMIT;
|
2909 |
} |
2910 |
if (vs->v9stat.mtime != -1) { |
2911 |
times[1].tv_sec = vs->v9stat.mtime;
|
2912 |
times[1].tv_nsec = 0; |
2913 |
} else {
|
2914 |
times[1].tv_nsec = UTIME_OMIT;
|
2915 |
} |
2916 |
|
2917 |
if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
|
2918 |
err = -errno; |
2919 |
} |
2920 |
} |
2921 |
|
2922 |
v9fs_wstat_post_utime(s, vs, err); |
2923 |
return;
|
2924 |
|
2925 |
out:
|
2926 |
v9fs_stat_free(&vs->v9stat); |
2927 |
complete_pdu(s, vs->pdu, err); |
2928 |
qemu_free(vs); |
2929 |
} |
2930 |
|
2931 |
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) |
2932 |
{ |
2933 |
if (err == -1) { |
2934 |
err = -errno; |
2935 |
} |
2936 |
v9fs_stat_free(&vs->v9stat); |
2937 |
complete_pdu(s, vs->pdu, err); |
2938 |
qemu_free(vs); |
2939 |
} |
2940 |
|
2941 |
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) |
2942 |
{ |
2943 |
uint32_t v9_mode; |
2944 |
|
2945 |
if (err == -1) { |
2946 |
err = -errno; |
2947 |
goto out;
|
2948 |
} |
2949 |
|
2950 |
v9_mode = stat_to_v9mode(&vs->stbuf); |
2951 |
|
2952 |
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
2953 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) { |
2954 |
/* Attempting to change the type */
|
2955 |
err = -EIO; |
2956 |
goto out;
|
2957 |
} |
2958 |
|
2959 |
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
2960 |
&vs->v9stat.extension))) { |
2961 |
err = -errno; |
2962 |
} |
2963 |
v9fs_wstat_post_chmod(s, vs, err); |
2964 |
return;
|
2965 |
|
2966 |
out:
|
2967 |
v9fs_stat_free(&vs->v9stat); |
2968 |
complete_pdu(s, vs->pdu, err); |
2969 |
qemu_free(vs); |
2970 |
} |
2971 |
|
2972 |
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
2973 |
{ |
2974 |
int32_t fid; |
2975 |
V9fsWstatState *vs; |
2976 |
int err = 0; |
2977 |
|
2978 |
vs = qemu_malloc(sizeof(*vs));
|
2979 |
vs->pdu = pdu; |
2980 |
vs->offset = 7;
|
2981 |
|
2982 |
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
2983 |
|
2984 |
vs->fidp = lookup_fid(s, fid); |
2985 |
if (vs->fidp == NULL) { |
2986 |
err = -EINVAL; |
2987 |
goto out;
|
2988 |
} |
2989 |
|
2990 |
/* do we need to sync the file? */
|
2991 |
if (donttouch_stat(&vs->v9stat)) {
|
2992 |
err = v9fs_do_fsync(s, vs->fidp->fs.fd); |
2993 |
v9fs_wstat_post_fsync(s, vs, err); |
2994 |
return;
|
2995 |
} |
2996 |
|
2997 |
if (vs->v9stat.mode != -1) { |
2998 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
2999 |
v9fs_wstat_post_lstat(s, vs, err); |
3000 |
return;
|
3001 |
} |
3002 |
|
3003 |
v9fs_wstat_post_chmod(s, vs, err); |
3004 |
return;
|
3005 |
|
3006 |
out:
|
3007 |
v9fs_stat_free(&vs->v9stat); |
3008 |
complete_pdu(s, vs->pdu, err); |
3009 |
qemu_free(vs); |
3010 |
} |
3011 |
|
3012 |
static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err) |
3013 |
{ |
3014 |
int32_t bsize_factor; |
3015 |
|
3016 |
if (err) {
|
3017 |
err = -errno; |
3018 |
goto out;
|
3019 |
} |
3020 |
|
3021 |
/*
|
3022 |
* compute bsize factor based on host file system block size
|
3023 |
* and client msize
|
3024 |
*/
|
3025 |
bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize; |
3026 |
if (!bsize_factor) {
|
3027 |
bsize_factor = 1;
|
3028 |
} |
3029 |
vs->v9statfs.f_type = vs->stbuf.f_type; |
3030 |
vs->v9statfs.f_bsize = vs->stbuf.f_bsize; |
3031 |
vs->v9statfs.f_bsize *= bsize_factor; |
3032 |
/*
|
3033 |
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
3034 |
* adjust(divide) the number of blocks, free blocks and available
|
3035 |
* blocks by bsize factor
|
3036 |
*/
|
3037 |
vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor; |
3038 |
vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor; |
3039 |
vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor; |
3040 |
vs->v9statfs.f_files = vs->stbuf.f_files; |
3041 |
vs->v9statfs.f_ffree = vs->stbuf.f_ffree; |
3042 |
vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] | |
3043 |
(unsigned long long)vs->stbuf.f_fsid.__val[1] << 32; |
3044 |
vs->v9statfs.f_namelen = vs->stbuf.f_namelen; |
3045 |
|
3046 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
|
3047 |
vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks, |
3048 |
vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files, |
3049 |
vs->v9statfs.f_ffree, vs->v9statfs.fsid_val, |
3050 |
vs->v9statfs.f_namelen); |
3051 |
|
3052 |
out:
|
3053 |
complete_pdu(s, vs->pdu, vs->offset); |
3054 |
qemu_free(vs); |
3055 |
} |
3056 |
|
3057 |
static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu) |
3058 |
{ |
3059 |
V9fsStatfsState *vs; |
3060 |
ssize_t err = 0;
|
3061 |
|
3062 |
vs = qemu_malloc(sizeof(*vs));
|
3063 |
vs->pdu = pdu; |
3064 |
vs->offset = 7;
|
3065 |
|
3066 |
memset(&vs->v9statfs, 0, sizeof(vs->v9statfs)); |
3067 |
|
3068 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
|
3069 |
|
3070 |
vs->fidp = lookup_fid(s, vs->fid); |
3071 |
if (vs->fidp == NULL) { |
3072 |
err = -ENOENT; |
3073 |
goto out;
|
3074 |
} |
3075 |
|
3076 |
err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf); |
3077 |
v9fs_statfs_post_statfs(s, vs, err); |
3078 |
return;
|
3079 |
|
3080 |
out:
|
3081 |
complete_pdu(s, vs->pdu, err); |
3082 |
qemu_free(vs); |
3083 |
} |
3084 |
|
3085 |
static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3086 |
{ |
3087 |
if (err == -1) { |
3088 |
err = -errno; |
3089 |
goto out;
|
3090 |
} |
3091 |
|
3092 |
stat_to_qid(&vs->stbuf, &vs->qid); |
3093 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
3094 |
err = vs->offset; |
3095 |
out:
|
3096 |
complete_pdu(s, vs->pdu, err); |
3097 |
v9fs_string_free(&vs->fullname); |
3098 |
v9fs_string_free(&vs->name); |
3099 |
qemu_free(vs); |
3100 |
} |
3101 |
|
3102 |
static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err) |
3103 |
{ |
3104 |
if (err == -1) { |
3105 |
err = -errno; |
3106 |
goto out;
|
3107 |
} |
3108 |
|
3109 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
3110 |
v9fs_mknod_post_lstat(s, vs, err); |
3111 |
return;
|
3112 |
out:
|
3113 |
complete_pdu(s, vs->pdu, err); |
3114 |
v9fs_string_free(&vs->fullname); |
3115 |
v9fs_string_free(&vs->name); |
3116 |
qemu_free(vs); |
3117 |
} |
3118 |
|
3119 |
static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu) |
3120 |
{ |
3121 |
int32_t fid; |
3122 |
V9fsMkState *vs; |
3123 |
int err = 0; |
3124 |
V9fsFidState *fidp; |
3125 |
gid_t gid; |
3126 |
int mode;
|
3127 |
int major, minor;
|
3128 |
|
3129 |
vs = qemu_malloc(sizeof(*vs));
|
3130 |
vs->pdu = pdu; |
3131 |
vs->offset = 7;
|
3132 |
|
3133 |
v9fs_string_init(&vs->fullname); |
3134 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode,
|
3135 |
&major, &minor, &gid); |
3136 |
|
3137 |
fidp = lookup_fid(s, fid); |
3138 |
if (fidp == NULL) { |
3139 |
err = -ENOENT; |
3140 |
goto out;
|
3141 |
} |
3142 |
|
3143 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
3144 |
err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor), |
3145 |
fidp->uid, gid); |
3146 |
v9fs_mknod_post_mknod(s, vs, err); |
3147 |
return;
|
3148 |
|
3149 |
out:
|
3150 |
complete_pdu(s, vs->pdu, err); |
3151 |
v9fs_string_free(&vs->fullname); |
3152 |
v9fs_string_free(&vs->name); |
3153 |
qemu_free(vs); |
3154 |
} |
3155 |
|
3156 |
static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3157 |
{ |
3158 |
if (err == -1) { |
3159 |
err = -errno; |
3160 |
goto out;
|
3161 |
} |
3162 |
|
3163 |
stat_to_qid(&vs->stbuf, &vs->qid); |
3164 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
3165 |
err = vs->offset; |
3166 |
out:
|
3167 |
complete_pdu(s, vs->pdu, err); |
3168 |
v9fs_string_free(&vs->fullname); |
3169 |
v9fs_string_free(&vs->name); |
3170 |
qemu_free(vs); |
3171 |
} |
3172 |
|
3173 |
static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err) |
3174 |
{ |
3175 |
if (err == -1) { |
3176 |
err = -errno; |
3177 |
goto out;
|
3178 |
} |
3179 |
|
3180 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
3181 |
v9fs_mkdir_post_lstat(s, vs, err); |
3182 |
return;
|
3183 |
out:
|
3184 |
complete_pdu(s, vs->pdu, err); |
3185 |
v9fs_string_free(&vs->fullname); |
3186 |
v9fs_string_free(&vs->name); |
3187 |
qemu_free(vs); |
3188 |
} |
3189 |
|
3190 |
static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu) |
3191 |
{ |
3192 |
int32_t fid; |
3193 |
V9fsMkState *vs; |
3194 |
int err = 0; |
3195 |
V9fsFidState *fidp; |
3196 |
gid_t gid; |
3197 |
int mode;
|
3198 |
|
3199 |
vs = qemu_malloc(sizeof(*vs));
|
3200 |
vs->pdu = pdu; |
3201 |
vs->offset = 7;
|
3202 |
|
3203 |
v9fs_string_init(&vs->fullname); |
3204 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode,
|
3205 |
&gid); |
3206 |
|
3207 |
fidp = lookup_fid(s, fid); |
3208 |
if (fidp == NULL) { |
3209 |
err = -ENOENT; |
3210 |
goto out;
|
3211 |
} |
3212 |
|
3213 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
3214 |
err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid); |
3215 |
v9fs_mkdir_post_mkdir(s, vs, err); |
3216 |
return;
|
3217 |
|
3218 |
out:
|
3219 |
complete_pdu(s, vs->pdu, err); |
3220 |
v9fs_string_free(&vs->fullname); |
3221 |
v9fs_string_free(&vs->name); |
3222 |
qemu_free(vs); |
3223 |
} |
3224 |
|
3225 |
static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err) |
3226 |
{ |
3227 |
|
3228 |
if (err < 0) { |
3229 |
err = -errno; |
3230 |
free_fid(s, vs->xattr_fidp->fid); |
3231 |
goto out;
|
3232 |
} |
3233 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
3234 |
err = vs->offset; |
3235 |
out:
|
3236 |
complete_pdu(s, vs->pdu, err); |
3237 |
v9fs_string_free(&vs->name); |
3238 |
qemu_free(vs); |
3239 |
return;
|
3240 |
} |
3241 |
|
3242 |
static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err) |
3243 |
{ |
3244 |
if (err < 0) { |
3245 |
err = -errno; |
3246 |
free_fid(s, vs->xattr_fidp->fid); |
3247 |
goto out;
|
3248 |
} |
3249 |
/*
|
3250 |
* Read the xattr value
|
3251 |
*/
|
3252 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
3253 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
3254 |
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
3255 |
if (vs->size) {
|
3256 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
3257 |
err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, |
3258 |
&vs->name, vs->xattr_fidp->fs.xattr.value, |
3259 |
vs->xattr_fidp->fs.xattr.len); |
3260 |
} |
3261 |
v9fs_post_xattr_getvalue(s, vs, err); |
3262 |
return;
|
3263 |
out:
|
3264 |
complete_pdu(s, vs->pdu, err); |
3265 |
v9fs_string_free(&vs->name); |
3266 |
qemu_free(vs); |
3267 |
} |
3268 |
|
3269 |
static void v9fs_post_lxattr_getvalue(V9fsState *s, |
3270 |
V9fsXattrState *vs, int err)
|
3271 |
{ |
3272 |
if (err < 0) { |
3273 |
err = -errno; |
3274 |
free_fid(s, vs->xattr_fidp->fid); |
3275 |
goto out;
|
3276 |
} |
3277 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
3278 |
err = vs->offset; |
3279 |
out:
|
3280 |
complete_pdu(s, vs->pdu, err); |
3281 |
v9fs_string_free(&vs->name); |
3282 |
qemu_free(vs); |
3283 |
return;
|
3284 |
} |
3285 |
|
3286 |
static void v9fs_post_lxattr_check(V9fsState *s, |
3287 |
V9fsXattrState *vs, ssize_t err) |
3288 |
{ |
3289 |
if (err < 0) { |
3290 |
err = -errno; |
3291 |
free_fid(s, vs->xattr_fidp->fid); |
3292 |
goto out;
|
3293 |
} |
3294 |
/*
|
3295 |
* Read the xattr value
|
3296 |
*/
|
3297 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
3298 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
3299 |
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
3300 |
if (vs->size) {
|
3301 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
3302 |
err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, |
3303 |
vs->xattr_fidp->fs.xattr.value, |
3304 |
vs->xattr_fidp->fs.xattr.len); |
3305 |
} |
3306 |
v9fs_post_lxattr_getvalue(s, vs, err); |
3307 |
return;
|
3308 |
out:
|
3309 |
complete_pdu(s, vs->pdu, err); |
3310 |
v9fs_string_free(&vs->name); |
3311 |
qemu_free(vs); |
3312 |
} |
3313 |
|
3314 |
static void v9fs_xattrwalk(V9fsState *s, V9fsPDU *pdu) |
3315 |
{ |
3316 |
ssize_t err = 0;
|
3317 |
V9fsXattrState *vs; |
3318 |
int32_t fid, newfid; |
3319 |
|
3320 |
vs = qemu_malloc(sizeof(*vs));
|
3321 |
vs->pdu = pdu; |
3322 |
vs->offset = 7;
|
3323 |
|
3324 |
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name);
|
3325 |
vs->file_fidp = lookup_fid(s, fid); |
3326 |
if (vs->file_fidp == NULL) { |
3327 |
err = -ENOENT; |
3328 |
goto out;
|
3329 |
} |
3330 |
|
3331 |
vs->xattr_fidp = alloc_fid(s, newfid); |
3332 |
if (vs->xattr_fidp == NULL) { |
3333 |
err = -EINVAL; |
3334 |
goto out;
|
3335 |
} |
3336 |
|
3337 |
v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path); |
3338 |
if (vs->name.data[0] == 0) { |
3339 |
/*
|
3340 |
* listxattr request. Get the size first
|
3341 |
*/
|
3342 |
vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, |
3343 |
NULL, 0); |
3344 |
if (vs->size < 0) { |
3345 |
err = vs->size; |
3346 |
} |
3347 |
v9fs_post_lxattr_check(s, vs, err); |
3348 |
return;
|
3349 |
} else {
|
3350 |
/*
|
3351 |
* specific xattr fid. We check for xattr
|
3352 |
* presence also collect the xattr size
|
3353 |
*/
|
3354 |
vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, |
3355 |
&vs->name, NULL, 0); |
3356 |
if (vs->size < 0) { |
3357 |
err = vs->size; |
3358 |
} |
3359 |
v9fs_post_xattr_check(s, vs, err); |
3360 |
return;
|
3361 |
} |
3362 |
out:
|
3363 |
complete_pdu(s, vs->pdu, err); |
3364 |
v9fs_string_free(&vs->name); |
3365 |
qemu_free(vs); |
3366 |
} |
3367 |
|
3368 |
static void v9fs_xattrcreate(V9fsState *s, V9fsPDU *pdu) |
3369 |
{ |
3370 |
int flags;
|
3371 |
int32_t fid; |
3372 |
ssize_t err = 0;
|
3373 |
V9fsXattrState *vs; |
3374 |
|
3375 |
vs = qemu_malloc(sizeof(*vs));
|
3376 |
vs->pdu = pdu; |
3377 |
vs->offset = 7;
|
3378 |
|
3379 |
pdu_unmarshal(vs->pdu, vs->offset, "dsqd",
|
3380 |
&fid, &vs->name, &vs->size, &flags); |
3381 |
|
3382 |
vs->file_fidp = lookup_fid(s, fid); |
3383 |
if (vs->file_fidp == NULL) { |
3384 |
err = -EINVAL; |
3385 |
goto out;
|
3386 |
} |
3387 |
|
3388 |
/* Make the file fid point to xattr */
|
3389 |
vs->xattr_fidp = vs->file_fidp; |
3390 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
3391 |
vs->xattr_fidp->fs.xattr.copied_len = 0;
|
3392 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
3393 |
vs->xattr_fidp->fs.xattr.flags = flags; |
3394 |
v9fs_string_init(&vs->xattr_fidp->fs.xattr.name); |
3395 |
v9fs_string_copy(&vs->xattr_fidp->fs.xattr.name, &vs->name); |
3396 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
3397 |
|
3398 |
out:
|
3399 |
complete_pdu(s, vs->pdu, err); |
3400 |
v9fs_string_free(&vs->name); |
3401 |
qemu_free(vs); |
3402 |
} |
3403 |
|
3404 |
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
3405 |
|
3406 |
static pdu_handler_t *pdu_handlers[] = {
|
3407 |
[P9_TREADDIR] = v9fs_readdir, |
3408 |
[P9_TSTATFS] = v9fs_statfs, |
3409 |
[P9_TGETATTR] = v9fs_getattr, |
3410 |
[P9_TSETATTR] = v9fs_setattr, |
3411 |
[P9_TXATTRWALK] = v9fs_xattrwalk, |
3412 |
[P9_TXATTRCREATE] = v9fs_xattrcreate, |
3413 |
[P9_TMKNOD] = v9fs_mknod, |
3414 |
[P9_TRENAME] = v9fs_rename, |
3415 |
[P9_TMKDIR] = v9fs_mkdir, |
3416 |
[P9_TVERSION] = v9fs_version, |
3417 |
[P9_TLOPEN] = v9fs_open, |
3418 |
[P9_TATTACH] = v9fs_attach, |
3419 |
[P9_TSTAT] = v9fs_stat, |
3420 |
[P9_TWALK] = v9fs_walk, |
3421 |
[P9_TCLUNK] = v9fs_clunk, |
3422 |
[P9_TOPEN] = v9fs_open, |
3423 |
[P9_TREAD] = v9fs_read, |
3424 |
#if 0
|
3425 |
[P9_TAUTH] = v9fs_auth,
|
3426 |
#endif
|
3427 |
[P9_TFLUSH] = v9fs_flush, |
3428 |
[P9_TLINK] = v9fs_link, |
3429 |
[P9_TSYMLINK] = v9fs_symlink, |
3430 |
[P9_TCREATE] = v9fs_create, |
3431 |
[P9_TLCREATE] = v9fs_lcreate, |
3432 |
[P9_TWRITE] = v9fs_write, |
3433 |
[P9_TWSTAT] = v9fs_wstat, |
3434 |
[P9_TREMOVE] = v9fs_remove, |
3435 |
}; |
3436 |
|
3437 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3438 |
{ |
3439 |
pdu_handler_t *handler; |
3440 |
|
3441 |
if (debug_9p_pdu) {
|
3442 |
pprint_pdu(pdu); |
3443 |
} |
3444 |
|
3445 |
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); |
3446 |
|
3447 |
handler = pdu_handlers[pdu->id]; |
3448 |
BUG_ON(handler == NULL);
|
3449 |
|
3450 |
handler(s, pdu); |
3451 |
} |
3452 |
|
3453 |
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
3454 |
{ |
3455 |
V9fsState *s = (V9fsState *)vdev; |
3456 |
V9fsPDU *pdu; |
3457 |
ssize_t len; |
3458 |
|
3459 |
while ((pdu = alloc_pdu(s)) &&
|
3460 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
3461 |
uint8_t *ptr; |
3462 |
|
3463 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
3464 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
3465 |
|
3466 |
ptr = pdu->elem.out_sg[0].iov_base;
|
3467 |
|
3468 |
memcpy(&pdu->size, ptr, 4);
|
3469 |
pdu->id = ptr[4];
|
3470 |
memcpy(&pdu->tag, ptr + 5, 2); |
3471 |
|
3472 |
submit_pdu(s, pdu); |
3473 |
} |
3474 |
|
3475 |
free_pdu(s, pdu); |
3476 |
} |
3477 |
|
3478 |
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
3479 |
{ |
3480 |
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
3481 |
return features;
|
3482 |
} |
3483 |
|
3484 |
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
3485 |
{ |
3486 |
return (V9fsState *)vdev;
|
3487 |
} |
3488 |
|
3489 |
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) |
3490 |
{ |
3491 |
struct virtio_9p_config *cfg;
|
3492 |
V9fsState *s = to_virtio_9p(vdev); |
3493 |
|
3494 |
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + |
3495 |
s->tag_len); |
3496 |
stw_raw(&cfg->tag_len, s->tag_len); |
3497 |
memcpy(cfg->tag, s->tag, s->tag_len); |
3498 |
memcpy(config, cfg, s->config_size); |
3499 |
qemu_free(cfg); |
3500 |
} |
3501 |
|
3502 |
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) |
3503 |
{ |
3504 |
V9fsState *s; |
3505 |
int i, len;
|
3506 |
struct stat stat;
|
3507 |
FsTypeEntry *fse; |
3508 |
|
3509 |
|
3510 |
s = (V9fsState *)virtio_common_init("virtio-9p",
|
3511 |
VIRTIO_ID_9P, |
3512 |
sizeof(struct virtio_9p_config)+ |
3513 |
MAX_TAG_LEN, |
3514 |
sizeof(V9fsState));
|
3515 |
|
3516 |
/* initialize pdu allocator */
|
3517 |
QLIST_INIT(&s->free_list); |
3518 |
for (i = 0; i < (MAX_REQ - 1); i++) { |
3519 |
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
3520 |
} |
3521 |
|
3522 |
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); |
3523 |
|
3524 |
fse = get_fsdev_fsentry(conf->fsdev_id); |
3525 |
|
3526 |
if (!fse) {
|
3527 |
/* We don't have a fsdev identified by fsdev_id */
|
3528 |
fprintf(stderr, "Virtio-9p device couldn't find fsdev "
|
3529 |
"with the id %s\n", conf->fsdev_id);
|
3530 |
exit(1);
|
3531 |
} |
3532 |
|
3533 |
if (!fse->path || !conf->tag) {
|
3534 |
/* we haven't specified a mount_tag or the path */
|
3535 |
fprintf(stderr, "fsdev with id %s needs path "
|
3536 |
"and Virtio-9p device needs mount_tag arguments\n",
|
3537 |
conf->fsdev_id); |
3538 |
exit(1);
|
3539 |
} |
3540 |
|
3541 |
if (!strcmp(fse->security_model, "passthrough")) { |
3542 |
/* Files on the Fileserver set to client user credentials */
|
3543 |
s->ctx.fs_sm = SM_PASSTHROUGH; |
3544 |
} else if (!strcmp(fse->security_model, "mapped")) { |
3545 |
/* Files on the fileserver are set to QEMU credentials.
|
3546 |
* Client user credentials are saved in extended attributes.
|
3547 |
*/
|
3548 |
s->ctx.fs_sm = SM_MAPPED; |
3549 |
} else {
|
3550 |
/* user haven't specified a correct security option */
|
3551 |
fprintf(stderr, "one of the following must be specified as the"
|
3552 |
"security option:\n\t security_model=passthrough \n\t "
|
3553 |
"security_model=mapped\n");
|
3554 |
return NULL; |
3555 |
} |
3556 |
|
3557 |
if (lstat(fse->path, &stat)) {
|
3558 |
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
3559 |
exit(1);
|
3560 |
} else if (!S_ISDIR(stat.st_mode)) { |
3561 |
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
3562 |
exit(1);
|
3563 |
} |
3564 |
|
3565 |
s->ctx.fs_root = qemu_strdup(fse->path); |
3566 |
len = strlen(conf->tag); |
3567 |
if (len > MAX_TAG_LEN) {
|
3568 |
len = MAX_TAG_LEN; |
3569 |
} |
3570 |
/* s->tag is non-NULL terminated string */
|
3571 |
s->tag = qemu_malloc(len); |
3572 |
memcpy(s->tag, conf->tag, len); |
3573 |
s->tag_len = len; |
3574 |
s->ctx.uid = -1;
|
3575 |
|
3576 |
s->ops = fse->ops; |
3577 |
s->vdev.get_features = virtio_9p_get_features; |
3578 |
s->config_size = sizeof(struct virtio_9p_config) + |
3579 |
s->tag_len; |
3580 |
s->vdev.get_config = virtio_9p_get_config; |
3581 |
|
3582 |
return &s->vdev;
|
3583 |
} |