root / hw / 9pfs / virtio-9p.c @ 936532a4
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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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#include "virtio-9p-xattr.h" |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov, |
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int iovcnt, int64_t offset)
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{
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return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset);
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} |
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|
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static int v9fs_do_pwritev(V9fsState *s, int fd, const struct iovec *iov, |
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int iovcnt, int64_t offset)
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{
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return s->ops->pwritev(&s->ctx, fd, iov, iovcnt, offset);
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} |
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|
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static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
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{
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_mode = mode; |
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return s->ops->chmod(&s->ctx, path->data, &cred);
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} |
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static int v9fs_do_mknod(V9fsState *s, 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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|
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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; |
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return s->ops->mkdir(&s->ctx, name, &cred);
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} |
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|
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static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) |
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{
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return s->ops->fstat(&s->ctx, fd, stbuf);
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} |
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|
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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; |
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|
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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 & 07777;
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flags = flags; |
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|
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return s->ops->open2(&s->ctx, fullname, flags, &cred);
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} |
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|
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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); |
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cred.fc_uid = fidp->uid; |
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cred.fc_gid = gid; |
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cred.fc_mode = 0777;
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return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
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} |
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static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) |
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{
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return s->ops->link(&s->ctx, oldpath->data, newpath->data);
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} |
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static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
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{
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return s->ops->truncate(&s->ctx, path->data, size);
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} |
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static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, |
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V9fsString *newpath) |
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{
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return s->ops->rename(&s->ctx, oldpath->data, newpath->data);
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} |
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|
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static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) |
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{
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = uid; |
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cred.fc_gid = gid; |
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|
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return s->ops->chown(&s->ctx, path->data, &cred);
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} |
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|
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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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} |
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|
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static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
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{
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return s->ops->remove(&s->ctx, path->data);
|
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} |
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|
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static int v9fs_do_fsync(V9fsState *s, int fd, int datasync) |
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{
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return s->ops->fsync(&s->ctx, fd, datasync);
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} |
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static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
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{
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return s->ops->statfs(&s->ctx, path->data, stbuf);
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} |
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|
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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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} |
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|
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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); |
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} |
| 275 |
|
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static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path, |
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V9fsString *xattr_name, |
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void *value, size_t size, int flags) |
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{
|
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return s->ops->lsetxattr(&s->ctx, path->data,
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xattr_name->data, value, size, flags); |
| 282 |
} |
| 283 |
|
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static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path, |
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V9fsString *xattr_name) |
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{
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return s->ops->lremovexattr(&s->ctx, path->data,
|
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xattr_name->data); |
| 289 |
} |
| 290 |
|
| 291 |
|
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static void v9fs_string_init(V9fsString *str) |
| 293 |
{
|
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str->data = NULL;
|
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str->size = 0;
|
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} |
| 297 |
|
| 298 |
static void v9fs_string_free(V9fsString *str) |
| 299 |
{
|
| 300 |
qemu_free(str->data); |
| 301 |
str->data = NULL;
|
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str->size = 0;
|
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} |
| 304 |
|
| 305 |
static void v9fs_string_null(V9fsString *str) |
| 306 |
{
|
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v9fs_string_free(str); |
| 308 |
} |
| 309 |
|
| 310 |
static int number_to_string(void *arg, char type) |
| 311 |
{
|
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unsigned int ret = 0; |
| 313 |
|
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switch (type) {
|
| 315 |
case 'u': { |
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unsigned int num = *(unsigned int *)arg; |
| 317 |
|
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do {
|
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ret++; |
| 320 |
num = num/10;
|
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} while (num);
|
| 322 |
break;
|
| 323 |
} |
| 324 |
case 'U': { |
| 325 |
unsigned long num = *(unsigned long *)arg; |
| 326 |
do {
|
| 327 |
ret++; |
| 328 |
num = num/10;
|
| 329 |
} while (num);
|
| 330 |
break;
|
| 331 |
} |
| 332 |
default:
|
| 333 |
printf("Number_to_string: Unknown number format\n");
|
| 334 |
return -1; |
| 335 |
} |
| 336 |
|
| 337 |
return ret;
|
| 338 |
} |
| 339 |
|
| 340 |
static int GCC_FMT_ATTR(2, 0) |
| 341 |
v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) |
| 342 |
{
|
| 343 |
va_list ap2; |
| 344 |
char *iter = (char *)fmt; |
| 345 |
int len = 0; |
| 346 |
int nr_args = 0; |
| 347 |
char *arg_char_ptr;
|
| 348 |
unsigned int arg_uint; |
| 349 |
unsigned long arg_ulong; |
| 350 |
|
| 351 |
/* Find the number of %'s that denotes an argument */
|
| 352 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
| 353 |
nr_args++; |
| 354 |
iter++; |
| 355 |
} |
| 356 |
|
| 357 |
len = strlen(fmt) - 2*nr_args;
|
| 358 |
|
| 359 |
if (!nr_args) {
|
| 360 |
goto alloc_print;
|
| 361 |
} |
| 362 |
|
| 363 |
va_copy(ap2, ap); |
| 364 |
|
| 365 |
iter = (char *)fmt;
|
| 366 |
|
| 367 |
/* Now parse the format string */
|
| 368 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
| 369 |
iter++; |
| 370 |
switch (*iter) {
|
| 371 |
case 'u': |
| 372 |
arg_uint = va_arg(ap2, unsigned int); |
| 373 |
len += number_to_string((void *)&arg_uint, 'u'); |
| 374 |
break;
|
| 375 |
case 'l': |
| 376 |
if (*++iter == 'u') { |
| 377 |
arg_ulong = va_arg(ap2, unsigned long); |
| 378 |
len += number_to_string((void *)&arg_ulong, 'U'); |
| 379 |
} else {
|
| 380 |
return -1; |
| 381 |
} |
| 382 |
break;
|
| 383 |
case 's': |
| 384 |
arg_char_ptr = va_arg(ap2, char *);
|
| 385 |
len += strlen(arg_char_ptr); |
| 386 |
break;
|
| 387 |
case 'c': |
| 388 |
len += 1;
|
| 389 |
break;
|
| 390 |
default:
|
| 391 |
fprintf(stderr, |
| 392 |
"v9fs_string_alloc_printf:Incorrect format %c", *iter);
|
| 393 |
return -1; |
| 394 |
} |
| 395 |
iter++; |
| 396 |
} |
| 397 |
|
| 398 |
alloc_print:
|
| 399 |
*strp = qemu_malloc((len + 1) * sizeof(**strp)); |
| 400 |
|
| 401 |
return vsprintf(*strp, fmt, ap);
|
| 402 |
} |
| 403 |
|
| 404 |
static void GCC_FMT_ATTR(2, 3) |
| 405 |
v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
| 406 |
{
|
| 407 |
va_list ap; |
| 408 |
int err;
|
| 409 |
|
| 410 |
v9fs_string_free(str); |
| 411 |
|
| 412 |
va_start(ap, fmt); |
| 413 |
err = v9fs_string_alloc_printf(&str->data, fmt, ap); |
| 414 |
BUG_ON(err == -1);
|
| 415 |
va_end(ap); |
| 416 |
|
| 417 |
str->size = err; |
| 418 |
} |
| 419 |
|
| 420 |
static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
| 421 |
{
|
| 422 |
v9fs_string_free(lhs); |
| 423 |
v9fs_string_sprintf(lhs, "%s", rhs->data);
|
| 424 |
} |
| 425 |
|
| 426 |
/*
|
| 427 |
* Return TRUE if s1 is an ancestor of s2.
|
| 428 |
*
|
| 429 |
* E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
|
| 430 |
* As a special case, We treat s1 as ancestor of s2 if they are same!
|
| 431 |
*/
|
| 432 |
static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2) |
| 433 |
{
|
| 434 |
if (!strncmp(s1->data, s2->data, s1->size)) {
|
| 435 |
if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') { |
| 436 |
return 1; |
| 437 |
} |
| 438 |
} |
| 439 |
return 0; |
| 440 |
} |
| 441 |
|
| 442 |
static size_t v9fs_string_size(V9fsString *str)
|
| 443 |
{
|
| 444 |
return str->size;
|
| 445 |
} |
| 446 |
|
| 447 |
static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
|
| 448 |
{
|
| 449 |
V9fsFidState *f; |
| 450 |
|
| 451 |
for (f = s->fid_list; f; f = f->next) {
|
| 452 |
if (f->fid == fid) {
|
| 453 |
return f;
|
| 454 |
} |
| 455 |
} |
| 456 |
|
| 457 |
return NULL; |
| 458 |
} |
| 459 |
|
| 460 |
static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
| 461 |
{
|
| 462 |
V9fsFidState *f; |
| 463 |
|
| 464 |
f = lookup_fid(s, fid); |
| 465 |
if (f) {
|
| 466 |
return NULL; |
| 467 |
} |
| 468 |
|
| 469 |
f = qemu_mallocz(sizeof(V9fsFidState));
|
| 470 |
|
| 471 |
f->fid = fid; |
| 472 |
f->fid_type = P9_FID_NONE; |
| 473 |
|
| 474 |
f->next = s->fid_list; |
| 475 |
s->fid_list = f; |
| 476 |
|
| 477 |
return f;
|
| 478 |
} |
| 479 |
|
| 480 |
static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
| 481 |
{
|
| 482 |
int retval = 0; |
| 483 |
|
| 484 |
if (fidp->fs.xattr.copied_len == -1) { |
| 485 |
/* getxattr/listxattr fid */
|
| 486 |
goto free_value;
|
| 487 |
} |
| 488 |
/*
|
| 489 |
* if this is fid for setxattr. clunk should
|
| 490 |
* result in setxattr localcall
|
| 491 |
*/
|
| 492 |
if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
|
| 493 |
/* clunk after partial write */
|
| 494 |
retval = -EINVAL; |
| 495 |
goto free_out;
|
| 496 |
} |
| 497 |
if (fidp->fs.xattr.len) {
|
| 498 |
retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, |
| 499 |
fidp->fs.xattr.value, |
| 500 |
fidp->fs.xattr.len, |
| 501 |
fidp->fs.xattr.flags); |
| 502 |
} else {
|
| 503 |
retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); |
| 504 |
} |
| 505 |
free_out:
|
| 506 |
v9fs_string_free(&fidp->fs.xattr.name); |
| 507 |
free_value:
|
| 508 |
if (fidp->fs.xattr.value) {
|
| 509 |
qemu_free(fidp->fs.xattr.value); |
| 510 |
} |
| 511 |
return retval;
|
| 512 |
} |
| 513 |
|
| 514 |
static int free_fid(V9fsState *s, int32_t fid) |
| 515 |
{
|
| 516 |
int retval = 0; |
| 517 |
V9fsFidState **fidpp, *fidp; |
| 518 |
|
| 519 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
| 520 |
if ((*fidpp)->fid == fid) {
|
| 521 |
break;
|
| 522 |
} |
| 523 |
} |
| 524 |
|
| 525 |
if (*fidpp == NULL) { |
| 526 |
return -ENOENT;
|
| 527 |
} |
| 528 |
|
| 529 |
fidp = *fidpp; |
| 530 |
*fidpp = fidp->next; |
| 531 |
|
| 532 |
if (fidp->fid_type == P9_FID_FILE) {
|
| 533 |
v9fs_do_close(s, fidp->fs.fd); |
| 534 |
} else if (fidp->fid_type == P9_FID_DIR) { |
| 535 |
v9fs_do_closedir(s, fidp->fs.dir); |
| 536 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
| 537 |
retval = v9fs_xattr_fid_clunk(s, fidp); |
| 538 |
} |
| 539 |
v9fs_string_free(&fidp->path); |
| 540 |
qemu_free(fidp); |
| 541 |
|
| 542 |
return retval;
|
| 543 |
} |
| 544 |
|
| 545 |
#define P9_QID_TYPE_DIR 0x80 |
| 546 |
#define P9_QID_TYPE_SYMLINK 0x02 |
| 547 |
|
| 548 |
#define P9_STAT_MODE_DIR 0x80000000 |
| 549 |
#define P9_STAT_MODE_APPEND 0x40000000 |
| 550 |
#define P9_STAT_MODE_EXCL 0x20000000 |
| 551 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
| 552 |
#define P9_STAT_MODE_AUTH 0x08000000 |
| 553 |
#define P9_STAT_MODE_TMP 0x04000000 |
| 554 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
| 555 |
#define P9_STAT_MODE_LINK 0x01000000 |
| 556 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
| 557 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
| 558 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
| 559 |
#define P9_STAT_MODE_SETUID 0x00080000 |
| 560 |
#define P9_STAT_MODE_SETGID 0x00040000 |
| 561 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
| 562 |
|
| 563 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
| 564 |
P9_STAT_MODE_SYMLINK | \ |
| 565 |
P9_STAT_MODE_LINK | \ |
| 566 |
P9_STAT_MODE_DEVICE | \ |
| 567 |
P9_STAT_MODE_NAMED_PIPE | \ |
| 568 |
P9_STAT_MODE_SOCKET) |
| 569 |
|
| 570 |
/* This is the algorithm from ufs in spfs */
|
| 571 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
| 572 |
{
|
| 573 |
size_t size; |
| 574 |
|
| 575 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
| 576 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
| 577 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
| 578 |
qidp->type = 0;
|
| 579 |
if (S_ISDIR(stbuf->st_mode)) {
|
| 580 |
qidp->type |= P9_QID_TYPE_DIR; |
| 581 |
} |
| 582 |
if (S_ISLNK(stbuf->st_mode)) {
|
| 583 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
| 584 |
} |
| 585 |
} |
| 586 |
|
| 587 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
| 588 |
{
|
| 589 |
struct stat stbuf;
|
| 590 |
int err;
|
| 591 |
|
| 592 |
err = v9fs_do_lstat(s, &fidp->path, &stbuf); |
| 593 |
if (err) {
|
| 594 |
return err;
|
| 595 |
} |
| 596 |
|
| 597 |
stat_to_qid(&stbuf, qidp); |
| 598 |
return 0; |
| 599 |
} |
| 600 |
|
| 601 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
| 602 |
{
|
| 603 |
V9fsPDU *pdu = NULL;
|
| 604 |
|
| 605 |
if (!QLIST_EMPTY(&s->free_list)) {
|
| 606 |
pdu = QLIST_FIRST(&s->free_list); |
| 607 |
QLIST_REMOVE(pdu, next); |
| 608 |
} |
| 609 |
return pdu;
|
| 610 |
} |
| 611 |
|
| 612 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
| 613 |
{
|
| 614 |
if (pdu) {
|
| 615 |
if (debug_9p_pdu) {
|
| 616 |
pprint_pdu(pdu); |
| 617 |
} |
| 618 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
| 619 |
} |
| 620 |
} |
| 621 |
|
| 622 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
| 623 |
size_t offset, size_t size, int pack)
|
| 624 |
{
|
| 625 |
int i = 0; |
| 626 |
size_t copied = 0;
|
| 627 |
|
| 628 |
for (i = 0; size && i < sg_count; i++) { |
| 629 |
size_t len; |
| 630 |
if (offset >= sg[i].iov_len) {
|
| 631 |
/* skip this sg */
|
| 632 |
offset -= sg[i].iov_len; |
| 633 |
continue;
|
| 634 |
} else {
|
| 635 |
len = MIN(sg[i].iov_len - offset, size); |
| 636 |
if (pack) {
|
| 637 |
memcpy(sg[i].iov_base + offset, addr, len); |
| 638 |
} else {
|
| 639 |
memcpy(addr, sg[i].iov_base + offset, len); |
| 640 |
} |
| 641 |
size -= len; |
| 642 |
copied += len; |
| 643 |
addr += len; |
| 644 |
if (size) {
|
| 645 |
offset = 0;
|
| 646 |
continue;
|
| 647 |
} |
| 648 |
} |
| 649 |
} |
| 650 |
|
| 651 |
return copied;
|
| 652 |
} |
| 653 |
|
| 654 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
| 655 |
{
|
| 656 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
| 657 |
offset, size, 0);
|
| 658 |
} |
| 659 |
|
| 660 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
| 661 |
size_t size) |
| 662 |
{
|
| 663 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
| 664 |
offset, size, 1);
|
| 665 |
} |
| 666 |
|
| 667 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
| 668 |
{
|
| 669 |
size_t pos = 0;
|
| 670 |
int i, j;
|
| 671 |
struct iovec *src_sg;
|
| 672 |
unsigned int num; |
| 673 |
|
| 674 |
if (rx) {
|
| 675 |
src_sg = pdu->elem.in_sg; |
| 676 |
num = pdu->elem.in_num; |
| 677 |
} else {
|
| 678 |
src_sg = pdu->elem.out_sg; |
| 679 |
num = pdu->elem.out_num; |
| 680 |
} |
| 681 |
|
| 682 |
j = 0;
|
| 683 |
for (i = 0; i < num; i++) { |
| 684 |
if (offset <= pos) {
|
| 685 |
sg[j].iov_base = src_sg[i].iov_base; |
| 686 |
sg[j].iov_len = src_sg[i].iov_len; |
| 687 |
j++; |
| 688 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
| 689 |
sg[j].iov_base = src_sg[i].iov_base; |
| 690 |
sg[j].iov_len = src_sg[i].iov_len; |
| 691 |
sg[j].iov_base += (offset - pos); |
| 692 |
sg[j].iov_len -= (offset - pos); |
| 693 |
j++; |
| 694 |
} |
| 695 |
pos += src_sg[i].iov_len; |
| 696 |
} |
| 697 |
|
| 698 |
return j;
|
| 699 |
} |
| 700 |
|
| 701 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
| 702 |
{
|
| 703 |
size_t old_offset = offset; |
| 704 |
va_list ap; |
| 705 |
int i;
|
| 706 |
|
| 707 |
va_start(ap, fmt); |
| 708 |
for (i = 0; fmt[i]; i++) { |
| 709 |
switch (fmt[i]) {
|
| 710 |
case 'b': { |
| 711 |
uint8_t *valp = va_arg(ap, uint8_t *); |
| 712 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
| 713 |
break;
|
| 714 |
} |
| 715 |
case 'w': { |
| 716 |
uint16_t val, *valp; |
| 717 |
valp = va_arg(ap, uint16_t *); |
| 718 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
| 719 |
*valp = le16_to_cpu(val); |
| 720 |
break;
|
| 721 |
} |
| 722 |
case 'd': { |
| 723 |
uint32_t val, *valp; |
| 724 |
valp = va_arg(ap, uint32_t *); |
| 725 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
| 726 |
*valp = le32_to_cpu(val); |
| 727 |
break;
|
| 728 |
} |
| 729 |
case 'q': { |
| 730 |
uint64_t val, *valp; |
| 731 |
valp = va_arg(ap, uint64_t *); |
| 732 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
| 733 |
*valp = le64_to_cpu(val); |
| 734 |
break;
|
| 735 |
} |
| 736 |
case 'v': { |
| 737 |
struct iovec *iov = va_arg(ap, struct iovec *); |
| 738 |
int *iovcnt = va_arg(ap, int *); |
| 739 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
| 740 |
break;
|
| 741 |
} |
| 742 |
case 's': { |
| 743 |
V9fsString *str = va_arg(ap, V9fsString *); |
| 744 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
| 745 |
/* FIXME: sanity check str->size */
|
| 746 |
str->data = qemu_malloc(str->size + 1);
|
| 747 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
| 748 |
str->data[str->size] = 0;
|
| 749 |
break;
|
| 750 |
} |
| 751 |
case 'Q': { |
| 752 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
| 753 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
| 754 |
&qidp->type, &qidp->version, &qidp->path); |
| 755 |
break;
|
| 756 |
} |
| 757 |
case 'S': { |
| 758 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
| 759 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
| 760 |
&statp->size, &statp->type, &statp->dev, |
| 761 |
&statp->qid, &statp->mode, &statp->atime, |
| 762 |
&statp->mtime, &statp->length, |
| 763 |
&statp->name, &statp->uid, &statp->gid, |
| 764 |
&statp->muid, &statp->extension, |
| 765 |
&statp->n_uid, &statp->n_gid, |
| 766 |
&statp->n_muid); |
| 767 |
break;
|
| 768 |
} |
| 769 |
case 'I': { |
| 770 |
V9fsIattr *iattr = va_arg(ap, V9fsIattr *); |
| 771 |
offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
|
| 772 |
&iattr->valid, &iattr->mode, |
| 773 |
&iattr->uid, &iattr->gid, &iattr->size, |
| 774 |
&iattr->atime_sec, &iattr->atime_nsec, |
| 775 |
&iattr->mtime_sec, &iattr->mtime_nsec); |
| 776 |
break;
|
| 777 |
} |
| 778 |
default:
|
| 779 |
break;
|
| 780 |
} |
| 781 |
} |
| 782 |
|
| 783 |
va_end(ap); |
| 784 |
|
| 785 |
return offset - old_offset;
|
| 786 |
} |
| 787 |
|
| 788 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
| 789 |
{
|
| 790 |
size_t old_offset = offset; |
| 791 |
va_list ap; |
| 792 |
int i;
|
| 793 |
|
| 794 |
va_start(ap, fmt); |
| 795 |
for (i = 0; fmt[i]; i++) { |
| 796 |
switch (fmt[i]) {
|
| 797 |
case 'b': { |
| 798 |
uint8_t val = va_arg(ap, int);
|
| 799 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
| 800 |
break;
|
| 801 |
} |
| 802 |
case 'w': { |
| 803 |
uint16_t val; |
| 804 |
cpu_to_le16w(&val, va_arg(ap, int));
|
| 805 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
| 806 |
break;
|
| 807 |
} |
| 808 |
case 'd': { |
| 809 |
uint32_t val; |
| 810 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
| 811 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
| 812 |
break;
|
| 813 |
} |
| 814 |
case 'q': { |
| 815 |
uint64_t val; |
| 816 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
| 817 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
| 818 |
break;
|
| 819 |
} |
| 820 |
case 'v': { |
| 821 |
struct iovec *iov = va_arg(ap, struct iovec *); |
| 822 |
int *iovcnt = va_arg(ap, int *); |
| 823 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
| 824 |
break;
|
| 825 |
} |
| 826 |
case 's': { |
| 827 |
V9fsString *str = va_arg(ap, V9fsString *); |
| 828 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
| 829 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
| 830 |
break;
|
| 831 |
} |
| 832 |
case 'Q': { |
| 833 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
| 834 |
offset += pdu_marshal(pdu, offset, "bdq",
|
| 835 |
qidp->type, qidp->version, qidp->path); |
| 836 |
break;
|
| 837 |
} |
| 838 |
case 'S': { |
| 839 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
| 840 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
| 841 |
statp->size, statp->type, statp->dev, |
| 842 |
&statp->qid, statp->mode, statp->atime, |
| 843 |
statp->mtime, statp->length, &statp->name, |
| 844 |
&statp->uid, &statp->gid, &statp->muid, |
| 845 |
&statp->extension, statp->n_uid, |
| 846 |
statp->n_gid, statp->n_muid); |
| 847 |
break;
|
| 848 |
} |
| 849 |
case 'A': { |
| 850 |
V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); |
| 851 |
offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
|
| 852 |
statp->st_result_mask, |
| 853 |
&statp->qid, statp->st_mode, |
| 854 |
statp->st_uid, statp->st_gid, |
| 855 |
statp->st_nlink, statp->st_rdev, |
| 856 |
statp->st_size, statp->st_blksize, statp->st_blocks, |
| 857 |
statp->st_atime_sec, statp->st_atime_nsec, |
| 858 |
statp->st_mtime_sec, statp->st_mtime_nsec, |
| 859 |
statp->st_ctime_sec, statp->st_ctime_nsec, |
| 860 |
statp->st_btime_sec, statp->st_btime_nsec, |
| 861 |
statp->st_gen, statp->st_data_version); |
| 862 |
break;
|
| 863 |
} |
| 864 |
default:
|
| 865 |
break;
|
| 866 |
} |
| 867 |
} |
| 868 |
va_end(ap); |
| 869 |
|
| 870 |
return offset - old_offset;
|
| 871 |
} |
| 872 |
|
| 873 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
| 874 |
{
|
| 875 |
int8_t id = pdu->id + 1; /* Response */ |
| 876 |
|
| 877 |
if (len < 0) { |
| 878 |
int err = -len;
|
| 879 |
len = 7;
|
| 880 |
|
| 881 |
if (s->proto_version != V9FS_PROTO_2000L) {
|
| 882 |
V9fsString str; |
| 883 |
|
| 884 |
str.data = strerror(err); |
| 885 |
str.size = strlen(str.data); |
| 886 |
|
| 887 |
len += pdu_marshal(pdu, len, "s", &str);
|
| 888 |
id = P9_RERROR; |
| 889 |
} |
| 890 |
|
| 891 |
len += pdu_marshal(pdu, len, "d", err);
|
| 892 |
|
| 893 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
| 894 |
id = P9_RLERROR; |
| 895 |
} |
| 896 |
} |
| 897 |
|
| 898 |
/* fill out the header */
|
| 899 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
| 900 |
|
| 901 |
/* keep these in sync */
|
| 902 |
pdu->size = len; |
| 903 |
pdu->id = id; |
| 904 |
|
| 905 |
/* push onto queue and notify */
|
| 906 |
virtqueue_push(s->vq, &pdu->elem, len); |
| 907 |
|
| 908 |
/* FIXME: we should batch these completions */
|
| 909 |
virtio_notify(&s->vdev, s->vq); |
| 910 |
|
| 911 |
free_pdu(s, pdu); |
| 912 |
} |
| 913 |
|
| 914 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
| 915 |
{
|
| 916 |
mode_t ret; |
| 917 |
|
| 918 |
ret = mode & 0777;
|
| 919 |
if (mode & P9_STAT_MODE_DIR) {
|
| 920 |
ret |= S_IFDIR; |
| 921 |
} |
| 922 |
|
| 923 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
| 924 |
ret |= S_IFLNK; |
| 925 |
} |
| 926 |
if (mode & P9_STAT_MODE_SOCKET) {
|
| 927 |
ret |= S_IFSOCK; |
| 928 |
} |
| 929 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
| 930 |
ret |= S_IFIFO; |
| 931 |
} |
| 932 |
if (mode & P9_STAT_MODE_DEVICE) {
|
| 933 |
if (extension && extension->data[0] == 'c') { |
| 934 |
ret |= S_IFCHR; |
| 935 |
} else {
|
| 936 |
ret |= S_IFBLK; |
| 937 |
} |
| 938 |
} |
| 939 |
|
| 940 |
if (!(ret&~0777)) { |
| 941 |
ret |= S_IFREG; |
| 942 |
} |
| 943 |
|
| 944 |
if (mode & P9_STAT_MODE_SETUID) {
|
| 945 |
ret |= S_ISUID; |
| 946 |
} |
| 947 |
if (mode & P9_STAT_MODE_SETGID) {
|
| 948 |
ret |= S_ISGID; |
| 949 |
} |
| 950 |
if (mode & P9_STAT_MODE_SETVTX) {
|
| 951 |
ret |= S_ISVTX; |
| 952 |
} |
| 953 |
|
| 954 |
return ret;
|
| 955 |
} |
| 956 |
|
| 957 |
static int donttouch_stat(V9fsStat *stat) |
| 958 |
{
|
| 959 |
if (stat->type == -1 && |
| 960 |
stat->dev == -1 &&
|
| 961 |
stat->qid.type == -1 &&
|
| 962 |
stat->qid.version == -1 &&
|
| 963 |
stat->qid.path == -1 &&
|
| 964 |
stat->mode == -1 &&
|
| 965 |
stat->atime == -1 &&
|
| 966 |
stat->mtime == -1 &&
|
| 967 |
stat->length == -1 &&
|
| 968 |
!stat->name.size && |
| 969 |
!stat->uid.size && |
| 970 |
!stat->gid.size && |
| 971 |
!stat->muid.size && |
| 972 |
stat->n_uid == -1 &&
|
| 973 |
stat->n_gid == -1 &&
|
| 974 |
stat->n_muid == -1) {
|
| 975 |
return 1; |
| 976 |
} |
| 977 |
|
| 978 |
return 0; |
| 979 |
} |
| 980 |
|
| 981 |
static void v9fs_stat_free(V9fsStat *stat) |
| 982 |
{
|
| 983 |
v9fs_string_free(&stat->name); |
| 984 |
v9fs_string_free(&stat->uid); |
| 985 |
v9fs_string_free(&stat->gid); |
| 986 |
v9fs_string_free(&stat->muid); |
| 987 |
v9fs_string_free(&stat->extension); |
| 988 |
} |
| 989 |
|
| 990 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
| 991 |
{
|
| 992 |
uint32_t mode; |
| 993 |
|
| 994 |
mode = stbuf->st_mode & 0777;
|
| 995 |
if (S_ISDIR(stbuf->st_mode)) {
|
| 996 |
mode |= P9_STAT_MODE_DIR; |
| 997 |
} |
| 998 |
|
| 999 |
if (S_ISLNK(stbuf->st_mode)) {
|
| 1000 |
mode |= P9_STAT_MODE_SYMLINK; |
| 1001 |
} |
| 1002 |
|
| 1003 |
if (S_ISSOCK(stbuf->st_mode)) {
|
| 1004 |
mode |= P9_STAT_MODE_SOCKET; |
| 1005 |
} |
| 1006 |
|
| 1007 |
if (S_ISFIFO(stbuf->st_mode)) {
|
| 1008 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
| 1009 |
} |
| 1010 |
|
| 1011 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
| 1012 |
mode |= P9_STAT_MODE_DEVICE; |
| 1013 |
} |
| 1014 |
|
| 1015 |
if (stbuf->st_mode & S_ISUID) {
|
| 1016 |
mode |= P9_STAT_MODE_SETUID; |
| 1017 |
} |
| 1018 |
|
| 1019 |
if (stbuf->st_mode & S_ISGID) {
|
| 1020 |
mode |= P9_STAT_MODE_SETGID; |
| 1021 |
} |
| 1022 |
|
| 1023 |
if (stbuf->st_mode & S_ISVTX) {
|
| 1024 |
mode |= P9_STAT_MODE_SETVTX; |
| 1025 |
} |
| 1026 |
|
| 1027 |
return mode;
|
| 1028 |
} |
| 1029 |
|
| 1030 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
| 1031 |
const struct stat *stbuf, |
| 1032 |
V9fsStat *v9stat) |
| 1033 |
{
|
| 1034 |
int err;
|
| 1035 |
const char *str; |
| 1036 |
|
| 1037 |
memset(v9stat, 0, sizeof(*v9stat)); |
| 1038 |
|
| 1039 |
stat_to_qid(stbuf, &v9stat->qid); |
| 1040 |
v9stat->mode = stat_to_v9mode(stbuf); |
| 1041 |
v9stat->atime = stbuf->st_atime; |
| 1042 |
v9stat->mtime = stbuf->st_mtime; |
| 1043 |
v9stat->length = stbuf->st_size; |
| 1044 |
|
| 1045 |
v9fs_string_null(&v9stat->uid); |
| 1046 |
v9fs_string_null(&v9stat->gid); |
| 1047 |
v9fs_string_null(&v9stat->muid); |
| 1048 |
|
| 1049 |
v9stat->n_uid = stbuf->st_uid; |
| 1050 |
v9stat->n_gid = stbuf->st_gid; |
| 1051 |
v9stat->n_muid = 0;
|
| 1052 |
|
| 1053 |
v9fs_string_null(&v9stat->extension); |
| 1054 |
|
| 1055 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
| 1056 |
err = v9fs_do_readlink(s, name, &v9stat->extension); |
| 1057 |
if (err == -1) { |
| 1058 |
err = -errno; |
| 1059 |
return err;
|
| 1060 |
} |
| 1061 |
v9stat->extension.data[err] = 0;
|
| 1062 |
v9stat->extension.size = err; |
| 1063 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
| 1064 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
| 1065 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
| 1066 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
| 1067 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
| 1068 |
v9fs_string_sprintf(&v9stat->extension, "%s %lu",
|
| 1069 |
"HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); |
| 1070 |
} |
| 1071 |
|
| 1072 |
str = strrchr(name->data, '/');
|
| 1073 |
if (str) {
|
| 1074 |
str += 1;
|
| 1075 |
} else {
|
| 1076 |
str = name->data; |
| 1077 |
} |
| 1078 |
|
| 1079 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
| 1080 |
|
| 1081 |
v9stat->size = 61 +
|
| 1082 |
v9fs_string_size(&v9stat->name) + |
| 1083 |
v9fs_string_size(&v9stat->uid) + |
| 1084 |
v9fs_string_size(&v9stat->gid) + |
| 1085 |
v9fs_string_size(&v9stat->muid) + |
| 1086 |
v9fs_string_size(&v9stat->extension); |
| 1087 |
return 0; |
| 1088 |
} |
| 1089 |
|
| 1090 |
#define P9_STATS_MODE 0x00000001ULL |
| 1091 |
#define P9_STATS_NLINK 0x00000002ULL |
| 1092 |
#define P9_STATS_UID 0x00000004ULL |
| 1093 |
#define P9_STATS_GID 0x00000008ULL |
| 1094 |
#define P9_STATS_RDEV 0x00000010ULL |
| 1095 |
#define P9_STATS_ATIME 0x00000020ULL |
| 1096 |
#define P9_STATS_MTIME 0x00000040ULL |
| 1097 |
#define P9_STATS_CTIME 0x00000080ULL |
| 1098 |
#define P9_STATS_INO 0x00000100ULL |
| 1099 |
#define P9_STATS_SIZE 0x00000200ULL |
| 1100 |
#define P9_STATS_BLOCKS 0x00000400ULL |
| 1101 |
|
| 1102 |
#define P9_STATS_BTIME 0x00000800ULL |
| 1103 |
#define P9_STATS_GEN 0x00001000ULL |
| 1104 |
#define P9_STATS_DATA_VERSION 0x00002000ULL |
| 1105 |
|
| 1106 |
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ |
| 1107 |
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ |
| 1108 |
|
| 1109 |
|
| 1110 |
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, |
| 1111 |
V9fsStatDotl *v9lstat) |
| 1112 |
{
|
| 1113 |
memset(v9lstat, 0, sizeof(*v9lstat)); |
| 1114 |
|
| 1115 |
v9lstat->st_mode = stbuf->st_mode; |
| 1116 |
v9lstat->st_nlink = stbuf->st_nlink; |
| 1117 |
v9lstat->st_uid = stbuf->st_uid; |
| 1118 |
v9lstat->st_gid = stbuf->st_gid; |
| 1119 |
v9lstat->st_rdev = stbuf->st_rdev; |
| 1120 |
v9lstat->st_size = stbuf->st_size; |
| 1121 |
v9lstat->st_blksize = stbuf->st_blksize; |
| 1122 |
v9lstat->st_blocks = stbuf->st_blocks; |
| 1123 |
v9lstat->st_atime_sec = stbuf->st_atime; |
| 1124 |
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; |
| 1125 |
v9lstat->st_mtime_sec = stbuf->st_mtime; |
| 1126 |
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; |
| 1127 |
v9lstat->st_ctime_sec = stbuf->st_ctime; |
| 1128 |
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; |
| 1129 |
/* Currently we only support BASIC fields in stat */
|
| 1130 |
v9lstat->st_result_mask = P9_STATS_BASIC; |
| 1131 |
|
| 1132 |
stat_to_qid(stbuf, &v9lstat->qid); |
| 1133 |
} |
| 1134 |
|
| 1135 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
| 1136 |
{
|
| 1137 |
while (len && *iovcnt) {
|
| 1138 |
if (len < sg->iov_len) {
|
| 1139 |
sg->iov_len -= len; |
| 1140 |
sg->iov_base += len; |
| 1141 |
len = 0;
|
| 1142 |
} else {
|
| 1143 |
len -= sg->iov_len; |
| 1144 |
sg++; |
| 1145 |
*iovcnt -= 1;
|
| 1146 |
} |
| 1147 |
} |
| 1148 |
|
| 1149 |
return sg;
|
| 1150 |
} |
| 1151 |
|
| 1152 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
| 1153 |
{
|
| 1154 |
int i;
|
| 1155 |
int total = 0; |
| 1156 |
|
| 1157 |
for (i = 0; i < *cnt; i++) { |
| 1158 |
if ((total + sg[i].iov_len) > cap) {
|
| 1159 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
| 1160 |
i++; |
| 1161 |
break;
|
| 1162 |
} |
| 1163 |
total += sg[i].iov_len; |
| 1164 |
} |
| 1165 |
|
| 1166 |
*cnt = i; |
| 1167 |
|
| 1168 |
return sg;
|
| 1169 |
} |
| 1170 |
|
| 1171 |
static void print_sg(struct iovec *sg, int cnt) |
| 1172 |
{
|
| 1173 |
int i;
|
| 1174 |
|
| 1175 |
printf("sg[%d]: {", cnt);
|
| 1176 |
for (i = 0; i < cnt; i++) { |
| 1177 |
if (i) {
|
| 1178 |
printf(", ");
|
| 1179 |
} |
| 1180 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
| 1181 |
} |
| 1182 |
printf("}\n");
|
| 1183 |
} |
| 1184 |
|
| 1185 |
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
| 1186 |
{
|
| 1187 |
V9fsString str; |
| 1188 |
v9fs_string_init(&str); |
| 1189 |
v9fs_string_copy(&str, dst); |
| 1190 |
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
| 1191 |
v9fs_string_free(&str); |
| 1192 |
} |
| 1193 |
|
| 1194 |
static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
| 1195 |
{
|
| 1196 |
V9fsString version; |
| 1197 |
size_t offset = 7;
|
| 1198 |
|
| 1199 |
pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
| 1200 |
|
| 1201 |
if (!strcmp(version.data, "9P2000.u")) { |
| 1202 |
s->proto_version = V9FS_PROTO_2000U; |
| 1203 |
} else if (!strcmp(version.data, "9P2000.L")) { |
| 1204 |
s->proto_version = V9FS_PROTO_2000L; |
| 1205 |
} else {
|
| 1206 |
v9fs_string_sprintf(&version, "unknown");
|
| 1207 |
} |
| 1208 |
|
| 1209 |
offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
| 1210 |
complete_pdu(s, pdu, offset); |
| 1211 |
|
| 1212 |
v9fs_string_free(&version); |
| 1213 |
} |
| 1214 |
|
| 1215 |
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) |
| 1216 |
{
|
| 1217 |
int32_t fid, afid, n_uname; |
| 1218 |
V9fsString uname, aname; |
| 1219 |
V9fsFidState *fidp; |
| 1220 |
V9fsQID qid; |
| 1221 |
size_t offset = 7;
|
| 1222 |
ssize_t err; |
| 1223 |
|
| 1224 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
| 1225 |
|
| 1226 |
fidp = alloc_fid(s, fid); |
| 1227 |
if (fidp == NULL) { |
| 1228 |
err = -EINVAL; |
| 1229 |
goto out;
|
| 1230 |
} |
| 1231 |
|
| 1232 |
fidp->uid = n_uname; |
| 1233 |
|
| 1234 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
| 1235 |
err = fid_to_qid(s, fidp, &qid); |
| 1236 |
if (err) {
|
| 1237 |
err = -EINVAL; |
| 1238 |
free_fid(s, fid); |
| 1239 |
goto out;
|
| 1240 |
} |
| 1241 |
|
| 1242 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
| 1243 |
|
| 1244 |
err = offset; |
| 1245 |
out:
|
| 1246 |
complete_pdu(s, pdu, err); |
| 1247 |
v9fs_string_free(&uname); |
| 1248 |
v9fs_string_free(&aname); |
| 1249 |
} |
| 1250 |
|
| 1251 |
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
| 1252 |
{
|
| 1253 |
if (err == -1) { |
| 1254 |
err = -errno; |
| 1255 |
goto out;
|
| 1256 |
} |
| 1257 |
|
| 1258 |
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); |
| 1259 |
if (err) {
|
| 1260 |
goto out;
|
| 1261 |
} |
| 1262 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); |
| 1263 |
err = vs->offset; |
| 1264 |
|
| 1265 |
out:
|
| 1266 |
complete_pdu(s, vs->pdu, err); |
| 1267 |
v9fs_stat_free(&vs->v9stat); |
| 1268 |
qemu_free(vs); |
| 1269 |
} |
| 1270 |
|
| 1271 |
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
| 1272 |
{
|
| 1273 |
int32_t fid; |
| 1274 |
V9fsStatState *vs; |
| 1275 |
ssize_t err = 0;
|
| 1276 |
|
| 1277 |
vs = qemu_malloc(sizeof(*vs));
|
| 1278 |
vs->pdu = pdu; |
| 1279 |
vs->offset = 7;
|
| 1280 |
|
| 1281 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
| 1282 |
|
| 1283 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
| 1284 |
|
| 1285 |
vs->fidp = lookup_fid(s, fid); |
| 1286 |
if (vs->fidp == NULL) { |
| 1287 |
err = -ENOENT; |
| 1288 |
goto out;
|
| 1289 |
} |
| 1290 |
|
| 1291 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
| 1292 |
v9fs_stat_post_lstat(s, vs, err); |
| 1293 |
return;
|
| 1294 |
|
| 1295 |
out:
|
| 1296 |
complete_pdu(s, vs->pdu, err); |
| 1297 |
v9fs_stat_free(&vs->v9stat); |
| 1298 |
qemu_free(vs); |
| 1299 |
} |
| 1300 |
|
| 1301 |
static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs, |
| 1302 |
int err)
|
| 1303 |
{
|
| 1304 |
if (err == -1) { |
| 1305 |
err = -errno; |
| 1306 |
goto out;
|
| 1307 |
} |
| 1308 |
|
| 1309 |
stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl); |
| 1310 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
|
| 1311 |
err = vs->offset; |
| 1312 |
|
| 1313 |
out:
|
| 1314 |
complete_pdu(s, vs->pdu, err); |
| 1315 |
qemu_free(vs); |
| 1316 |
} |
| 1317 |
|
| 1318 |
static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu) |
| 1319 |
{
|
| 1320 |
int32_t fid; |
| 1321 |
V9fsStatStateDotl *vs; |
| 1322 |
ssize_t err = 0;
|
| 1323 |
V9fsFidState *fidp; |
| 1324 |
uint64_t request_mask; |
| 1325 |
|
| 1326 |
vs = qemu_malloc(sizeof(*vs));
|
| 1327 |
vs->pdu = pdu; |
| 1328 |
vs->offset = 7;
|
| 1329 |
|
| 1330 |
memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl)); |
| 1331 |
|
| 1332 |
pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
|
| 1333 |
|
| 1334 |
fidp = lookup_fid(s, fid); |
| 1335 |
if (fidp == NULL) { |
| 1336 |
err = -ENOENT; |
| 1337 |
goto out;
|
| 1338 |
} |
| 1339 |
|
| 1340 |
/* Currently we only support BASIC fields in stat, so there is no
|
| 1341 |
* need to look at request_mask.
|
| 1342 |
*/
|
| 1343 |
err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf); |
| 1344 |
v9fs_getattr_post_lstat(s, vs, err); |
| 1345 |
return;
|
| 1346 |
|
| 1347 |
out:
|
| 1348 |
complete_pdu(s, vs->pdu, err); |
| 1349 |
qemu_free(vs); |
| 1350 |
} |
| 1351 |
|
| 1352 |
/* From Linux kernel code */
|
| 1353 |
#define ATTR_MODE (1 << 0) |
| 1354 |
#define ATTR_UID (1 << 1) |
| 1355 |
#define ATTR_GID (1 << 2) |
| 1356 |
#define ATTR_SIZE (1 << 3) |
| 1357 |
#define ATTR_ATIME (1 << 4) |
| 1358 |
#define ATTR_MTIME (1 << 5) |
| 1359 |
#define ATTR_CTIME (1 << 6) |
| 1360 |
#define ATTR_MASK 127 |
| 1361 |
#define ATTR_ATIME_SET (1 << 7) |
| 1362 |
#define ATTR_MTIME_SET (1 << 8) |
| 1363 |
|
| 1364 |
static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs, |
| 1365 |
int err)
|
| 1366 |
{
|
| 1367 |
if (err == -1) { |
| 1368 |
err = -errno; |
| 1369 |
goto out;
|
| 1370 |
} |
| 1371 |
err = vs->offset; |
| 1372 |
|
| 1373 |
out:
|
| 1374 |
complete_pdu(s, vs->pdu, err); |
| 1375 |
qemu_free(vs); |
| 1376 |
} |
| 1377 |
|
| 1378 |
static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err) |
| 1379 |
{
|
| 1380 |
if (err == -1) { |
| 1381 |
err = -errno; |
| 1382 |
goto out;
|
| 1383 |
} |
| 1384 |
|
| 1385 |
if (vs->v9iattr.valid & (ATTR_SIZE)) {
|
| 1386 |
err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size); |
| 1387 |
} |
| 1388 |
v9fs_setattr_post_truncate(s, vs, err); |
| 1389 |
return;
|
| 1390 |
|
| 1391 |
out:
|
| 1392 |
complete_pdu(s, vs->pdu, err); |
| 1393 |
qemu_free(vs); |
| 1394 |
} |
| 1395 |
|
| 1396 |
static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs, |
| 1397 |
int err)
|
| 1398 |
{
|
| 1399 |
if (err == -1) { |
| 1400 |
err = -errno; |
| 1401 |
goto out;
|
| 1402 |
} |
| 1403 |
|
| 1404 |
/* If the only valid entry in iattr is ctime we can call
|
| 1405 |
* chown(-1,-1) to update the ctime of the file
|
| 1406 |
*/
|
| 1407 |
if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
|
| 1408 |
((vs->v9iattr.valid & ATTR_CTIME) |
| 1409 |
&& !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) {
|
| 1410 |
if (!(vs->v9iattr.valid & ATTR_UID)) {
|
| 1411 |
vs->v9iattr.uid = -1;
|
| 1412 |
} |
| 1413 |
if (!(vs->v9iattr.valid & ATTR_GID)) {
|
| 1414 |
vs->v9iattr.gid = -1;
|
| 1415 |
} |
| 1416 |
err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid, |
| 1417 |
vs->v9iattr.gid); |
| 1418 |
} |
| 1419 |
v9fs_setattr_post_chown(s, vs, err); |
| 1420 |
return;
|
| 1421 |
|
| 1422 |
out:
|
| 1423 |
complete_pdu(s, vs->pdu, err); |
| 1424 |
qemu_free(vs); |
| 1425 |
} |
| 1426 |
|
| 1427 |
static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err) |
| 1428 |
{
|
| 1429 |
if (err == -1) { |
| 1430 |
err = -errno; |
| 1431 |
goto out;
|
| 1432 |
} |
| 1433 |
|
| 1434 |
if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
|
| 1435 |
struct timespec times[2]; |
| 1436 |
if (vs->v9iattr.valid & ATTR_ATIME) {
|
| 1437 |
if (vs->v9iattr.valid & ATTR_ATIME_SET) {
|
| 1438 |
times[0].tv_sec = vs->v9iattr.atime_sec;
|
| 1439 |
times[0].tv_nsec = vs->v9iattr.atime_nsec;
|
| 1440 |
} else {
|
| 1441 |
times[0].tv_nsec = UTIME_NOW;
|
| 1442 |
} |
| 1443 |
} else {
|
| 1444 |
times[0].tv_nsec = UTIME_OMIT;
|
| 1445 |
} |
| 1446 |
|
| 1447 |
if (vs->v9iattr.valid & ATTR_MTIME) {
|
| 1448 |
if (vs->v9iattr.valid & ATTR_MTIME_SET) {
|
| 1449 |
times[1].tv_sec = vs->v9iattr.mtime_sec;
|
| 1450 |
times[1].tv_nsec = vs->v9iattr.mtime_nsec;
|
| 1451 |
} else {
|
| 1452 |
times[1].tv_nsec = UTIME_NOW;
|
| 1453 |
} |
| 1454 |
} else {
|
| 1455 |
times[1].tv_nsec = UTIME_OMIT;
|
| 1456 |
} |
| 1457 |
err = v9fs_do_utimensat(s, &vs->fidp->path, times); |
| 1458 |
} |
| 1459 |
v9fs_setattr_post_utimensat(s, vs, err); |
| 1460 |
return;
|
| 1461 |
|
| 1462 |
out:
|
| 1463 |
complete_pdu(s, vs->pdu, err); |
| 1464 |
qemu_free(vs); |
| 1465 |
} |
| 1466 |
|
| 1467 |
static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu) |
| 1468 |
{
|
| 1469 |
int32_t fid; |
| 1470 |
V9fsSetattrState *vs; |
| 1471 |
int err = 0; |
| 1472 |
|
| 1473 |
vs = qemu_malloc(sizeof(*vs));
|
| 1474 |
vs->pdu = pdu; |
| 1475 |
vs->offset = 7;
|
| 1476 |
|
| 1477 |
pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr);
|
| 1478 |
|
| 1479 |
vs->fidp = lookup_fid(s, fid); |
| 1480 |
if (vs->fidp == NULL) { |
| 1481 |
err = -EINVAL; |
| 1482 |
goto out;
|
| 1483 |
} |
| 1484 |
|
| 1485 |
if (vs->v9iattr.valid & ATTR_MODE) {
|
| 1486 |
err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode); |
| 1487 |
} |
| 1488 |
|
| 1489 |
v9fs_setattr_post_chmod(s, vs, err); |
| 1490 |
return;
|
| 1491 |
|
| 1492 |
out:
|
| 1493 |
complete_pdu(s, vs->pdu, err); |
| 1494 |
qemu_free(vs); |
| 1495 |
} |
| 1496 |
|
| 1497 |
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
| 1498 |
{
|
| 1499 |
complete_pdu(s, vs->pdu, err); |
| 1500 |
|
| 1501 |
if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
|
| 1502 |
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
| 1503 |
v9fs_string_free(&vs->wnames[vs->name_idx]); |
| 1504 |
} |
| 1505 |
|
| 1506 |
qemu_free(vs->wnames); |
| 1507 |
qemu_free(vs->qids); |
| 1508 |
} |
| 1509 |
} |
| 1510 |
|
| 1511 |
static void v9fs_walk_marshal(V9fsWalkState *vs) |
| 1512 |
{
|
| 1513 |
int i;
|
| 1514 |
vs->offset = 7;
|
| 1515 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
| 1516 |
|
| 1517 |
for (i = 0; i < vs->nwnames; i++) { |
| 1518 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
| 1519 |
} |
| 1520 |
} |
| 1521 |
|
| 1522 |
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, |
| 1523 |
int err)
|
| 1524 |
{
|
| 1525 |
if (err == -1) { |
| 1526 |
free_fid(s, vs->newfidp->fid); |
| 1527 |
v9fs_string_free(&vs->path); |
| 1528 |
err = -ENOENT; |
| 1529 |
goto out;
|
| 1530 |
} |
| 1531 |
|
| 1532 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
| 1533 |
|
| 1534 |
vs->name_idx++; |
| 1535 |
if (vs->name_idx < vs->nwnames) {
|
| 1536 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
| 1537 |
vs->wnames[vs->name_idx].data); |
| 1538 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
| 1539 |
|
| 1540 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
| 1541 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
| 1542 |
return;
|
| 1543 |
} |
| 1544 |
|
| 1545 |
v9fs_string_free(&vs->path); |
| 1546 |
v9fs_walk_marshal(vs); |
| 1547 |
err = vs->offset; |
| 1548 |
out:
|
| 1549 |
v9fs_walk_complete(s, vs, err); |
| 1550 |
} |
| 1551 |
|
| 1552 |
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, |
| 1553 |
int err)
|
| 1554 |
{
|
| 1555 |
if (err == -1) { |
| 1556 |
v9fs_string_free(&vs->path); |
| 1557 |
err = -ENOENT; |
| 1558 |
goto out;
|
| 1559 |
} |
| 1560 |
|
| 1561 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
| 1562 |
vs->name_idx++; |
| 1563 |
if (vs->name_idx < vs->nwnames) {
|
| 1564 |
|
| 1565 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
| 1566 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
| 1567 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
| 1568 |
|
| 1569 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
| 1570 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
| 1571 |
return;
|
| 1572 |
} |
| 1573 |
|
| 1574 |
v9fs_string_free(&vs->path); |
| 1575 |
v9fs_walk_marshal(vs); |
| 1576 |
err = vs->offset; |
| 1577 |
out:
|
| 1578 |
v9fs_walk_complete(s, vs, err); |
| 1579 |
} |
| 1580 |
|
| 1581 |
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
| 1582 |
{
|
| 1583 |
int32_t fid, newfid; |
| 1584 |
V9fsWalkState *vs; |
| 1585 |
int err = 0; |
| 1586 |
int i;
|
| 1587 |
|
| 1588 |
vs = qemu_malloc(sizeof(*vs));
|
| 1589 |
vs->pdu = pdu; |
| 1590 |
vs->wnames = NULL;
|
| 1591 |
vs->qids = NULL;
|
| 1592 |
vs->offset = 7;
|
| 1593 |
|
| 1594 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
| 1595 |
&newfid, &vs->nwnames); |
| 1596 |
|
| 1597 |
if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
|
| 1598 |
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
| 1599 |
|
| 1600 |
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); |
| 1601 |
|
| 1602 |
for (i = 0; i < vs->nwnames; i++) { |
| 1603 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
| 1604 |
&vs->wnames[i]); |
| 1605 |
} |
| 1606 |
} else if (vs->nwnames > P9_MAXWELEM) { |
| 1607 |
err = -EINVAL; |
| 1608 |
goto out;
|
| 1609 |
} |
| 1610 |
|
| 1611 |
vs->fidp = lookup_fid(s, fid); |
| 1612 |
if (vs->fidp == NULL) { |
| 1613 |
err = -ENOENT; |
| 1614 |
goto out;
|
| 1615 |
} |
| 1616 |
|
| 1617 |
/* FIXME: is this really valid? */
|
| 1618 |
if (fid == newfid) {
|
| 1619 |
|
| 1620 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
| 1621 |
v9fs_string_init(&vs->path); |
| 1622 |
vs->name_idx = 0;
|
| 1623 |
|
| 1624 |
if (vs->name_idx < vs->nwnames) {
|
| 1625 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
| 1626 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
| 1627 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
| 1628 |
|
| 1629 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
| 1630 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
| 1631 |
return;
|
| 1632 |
} |
| 1633 |
} else {
|
| 1634 |
vs->newfidp = alloc_fid(s, newfid); |
| 1635 |
if (vs->newfidp == NULL) { |
| 1636 |
err = -EINVAL; |
| 1637 |
goto out;
|
| 1638 |
} |
| 1639 |
|
| 1640 |
vs->newfidp->uid = vs->fidp->uid; |
| 1641 |
v9fs_string_init(&vs->path); |
| 1642 |
vs->name_idx = 0;
|
| 1643 |
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); |
| 1644 |
|
| 1645 |
if (vs->name_idx < vs->nwnames) {
|
| 1646 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
| 1647 |
vs->wnames[vs->name_idx].data); |
| 1648 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
| 1649 |
|
| 1650 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
| 1651 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
| 1652 |
return;
|
| 1653 |
} |
| 1654 |
} |
| 1655 |
|
| 1656 |
v9fs_walk_marshal(vs); |
| 1657 |
err = vs->offset; |
| 1658 |
out:
|
| 1659 |
v9fs_walk_complete(s, vs, err); |
| 1660 |
} |
| 1661 |
|
| 1662 |
static int32_t get_iounit(V9fsState *s, V9fsString *name)
|
| 1663 |
{
|
| 1664 |
struct statfs stbuf;
|
| 1665 |
int32_t iounit = 0;
|
| 1666 |
|
| 1667 |
/*
|
| 1668 |
* iounit should be multiples of f_bsize (host filesystem block size
|
| 1669 |
* and as well as less than (client msize - P9_IOHDRSZ))
|
| 1670 |
*/
|
| 1671 |
if (!v9fs_do_statfs(s, name, &stbuf)) {
|
| 1672 |
iounit = stbuf.f_bsize; |
| 1673 |
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; |
| 1674 |
} |
| 1675 |
|
| 1676 |
if (!iounit) {
|
| 1677 |
iounit = s->msize - P9_IOHDRSZ; |
| 1678 |
} |
| 1679 |
return iounit;
|
| 1680 |
} |
| 1681 |
|
| 1682 |
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
| 1683 |
{
|
| 1684 |
if (vs->fidp->fs.dir == NULL) { |
| 1685 |
err = -errno; |
| 1686 |
goto out;
|
| 1687 |
} |
| 1688 |
vs->fidp->fid_type = P9_FID_DIR; |
| 1689 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
| 1690 |
err = vs->offset; |
| 1691 |
out:
|
| 1692 |
complete_pdu(s, vs->pdu, err); |
| 1693 |
qemu_free(vs); |
| 1694 |
|
| 1695 |
} |
| 1696 |
|
| 1697 |
static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
| 1698 |
{
|
| 1699 |
int err;
|
| 1700 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
| 1701 |
err = vs->offset; |
| 1702 |
complete_pdu(s, vs->pdu, err); |
| 1703 |
qemu_free(vs); |
| 1704 |
} |
| 1705 |
|
| 1706 |
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
| 1707 |
{
|
| 1708 |
if (vs->fidp->fs.fd == -1) { |
| 1709 |
err = -errno; |
| 1710 |
goto out;
|
| 1711 |
} |
| 1712 |
vs->fidp->fid_type = P9_FID_FILE; |
| 1713 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
| 1714 |
v9fs_open_post_getiounit(s, vs); |
| 1715 |
return;
|
| 1716 |
out:
|
| 1717 |
complete_pdu(s, vs->pdu, err); |
| 1718 |
qemu_free(vs); |
| 1719 |
} |
| 1720 |
|
| 1721 |
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) |
| 1722 |
{
|
| 1723 |
int flags;
|
| 1724 |
|
| 1725 |
if (err) {
|
| 1726 |
err = -errno; |
| 1727 |
goto out;
|
| 1728 |
} |
| 1729 |
|
| 1730 |
stat_to_qid(&vs->stbuf, &vs->qid); |
| 1731 |
|
| 1732 |
if (S_ISDIR(vs->stbuf.st_mode)) {
|
| 1733 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path); |
| 1734 |
v9fs_open_post_opendir(s, vs, err); |
| 1735 |
} else {
|
| 1736 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
| 1737 |
flags = vs->mode; |
| 1738 |
flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
| 1739 |
/* Ignore direct disk access hint until the server supports it. */
|
| 1740 |
flags &= ~O_DIRECT; |
| 1741 |
} else {
|
| 1742 |
flags = omode_to_uflags(vs->mode); |
| 1743 |
} |
| 1744 |
vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags); |
| 1745 |
v9fs_open_post_open(s, vs, err); |
| 1746 |
} |
| 1747 |
return;
|
| 1748 |
out:
|
| 1749 |
complete_pdu(s, vs->pdu, err); |
| 1750 |
qemu_free(vs); |
| 1751 |
} |
| 1752 |
|
| 1753 |
static void v9fs_open(V9fsState *s, V9fsPDU *pdu) |
| 1754 |
{
|
| 1755 |
int32_t fid; |
| 1756 |
V9fsOpenState *vs; |
| 1757 |
ssize_t err = 0;
|
| 1758 |
|
| 1759 |
vs = qemu_malloc(sizeof(*vs));
|
| 1760 |
vs->pdu = pdu; |
| 1761 |
vs->offset = 7;
|
| 1762 |
vs->mode = 0;
|
| 1763 |
|
| 1764 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
| 1765 |
pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode);
|
| 1766 |
} else {
|
| 1767 |
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
| 1768 |
} |
| 1769 |
|
| 1770 |
vs->fidp = lookup_fid(s, fid); |
| 1771 |
if (vs->fidp == NULL) { |
| 1772 |
err = -ENOENT; |
| 1773 |
goto out;
|
| 1774 |
} |
| 1775 |
|
| 1776 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
| 1777 |
|
| 1778 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
| 1779 |
|
| 1780 |
v9fs_open_post_lstat(s, vs, err); |
| 1781 |
return;
|
| 1782 |
out:
|
| 1783 |
complete_pdu(s, pdu, err); |
| 1784 |
qemu_free(vs); |
| 1785 |
} |
| 1786 |
|
| 1787 |
static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
| 1788 |
{
|
| 1789 |
if (err == 0) { |
| 1790 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
| 1791 |
stat_to_qid(&vs->stbuf, &vs->qid); |
| 1792 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
|
| 1793 |
vs->iounit); |
| 1794 |
err = vs->offset; |
| 1795 |
} else {
|
| 1796 |
vs->fidp->fid_type = P9_FID_NONE; |
| 1797 |
err = -errno; |
| 1798 |
if (vs->fidp->fs.fd > 0) { |
| 1799 |
close(vs->fidp->fs.fd); |
| 1800 |
} |
| 1801 |
} |
| 1802 |
|
| 1803 |
complete_pdu(s, vs->pdu, err); |
| 1804 |
v9fs_string_free(&vs->name); |
| 1805 |
v9fs_string_free(&vs->fullname); |
| 1806 |
qemu_free(vs); |
| 1807 |
} |
| 1808 |
|
| 1809 |
static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, |
| 1810 |
int err)
|
| 1811 |
{
|
| 1812 |
if (err) {
|
| 1813 |
err = -errno; |
| 1814 |
goto out;
|
| 1815 |
} |
| 1816 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
| 1817 |
|
| 1818 |
out:
|
| 1819 |
v9fs_post_lcreate(s, vs, err); |
| 1820 |
} |
| 1821 |
|
| 1822 |
static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, |
| 1823 |
int err)
|
| 1824 |
{
|
| 1825 |
if (vs->fidp->fs.fd == -1) { |
| 1826 |
err = -errno; |
| 1827 |
goto out;
|
| 1828 |
} |
| 1829 |
vs->fidp->fid_type = P9_FID_FILE; |
| 1830 |
vs->iounit = get_iounit(s, &vs->fullname); |
| 1831 |
v9fs_lcreate_post_get_iounit(s, vs, err); |
| 1832 |
return;
|
| 1833 |
|
| 1834 |
out:
|
| 1835 |
v9fs_post_lcreate(s, vs, err); |
| 1836 |
} |
| 1837 |
|
| 1838 |
static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu) |
| 1839 |
{
|
| 1840 |
int32_t dfid, flags, mode; |
| 1841 |
gid_t gid; |
| 1842 |
V9fsLcreateState *vs; |
| 1843 |
ssize_t err = 0;
|
| 1844 |
|
| 1845 |
vs = qemu_malloc(sizeof(*vs));
|
| 1846 |
vs->pdu = pdu; |
| 1847 |
vs->offset = 7;
|
| 1848 |
|
| 1849 |
v9fs_string_init(&vs->fullname); |
| 1850 |
|
| 1851 |
pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
|
| 1852 |
&mode, &gid); |
| 1853 |
|
| 1854 |
vs->fidp = lookup_fid(s, dfid); |
| 1855 |
if (vs->fidp == NULL) { |
| 1856 |
err = -ENOENT; |
| 1857 |
goto out;
|
| 1858 |
} |
| 1859 |
|
| 1860 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
| 1861 |
vs->name.data); |
| 1862 |
|
| 1863 |
/* Ignore direct disk access hint until the server supports it. */
|
| 1864 |
flags &= ~O_DIRECT; |
| 1865 |
|
| 1866 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
| 1867 |
gid, flags, mode); |
| 1868 |
v9fs_lcreate_post_do_open2(s, vs, err); |
| 1869 |
return;
|
| 1870 |
|
| 1871 |
out:
|
| 1872 |
complete_pdu(s, vs->pdu, err); |
| 1873 |
v9fs_string_free(&vs->name); |
| 1874 |
qemu_free(vs); |
| 1875 |
} |
| 1876 |
|
| 1877 |
static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err) |
| 1878 |
{
|
| 1879 |
if (err == -1) { |
| 1880 |
err = -errno; |
| 1881 |
} |
| 1882 |
complete_pdu(s, pdu, err); |
| 1883 |
} |
| 1884 |
|
| 1885 |
static void v9fs_fsync(V9fsState *s, V9fsPDU *pdu) |
| 1886 |
{
|
| 1887 |
int32_t fid; |
| 1888 |
size_t offset = 7;
|
| 1889 |
V9fsFidState *fidp; |
| 1890 |
int datasync;
|
| 1891 |
int err;
|
| 1892 |
|
| 1893 |
pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
|
| 1894 |
fidp = lookup_fid(s, fid); |
| 1895 |
if (fidp == NULL) { |
| 1896 |
err = -ENOENT; |
| 1897 |
v9fs_post_do_fsync(s, pdu, err); |
| 1898 |
return;
|
| 1899 |
} |
| 1900 |
err = v9fs_do_fsync(s, fidp->fs.fd, datasync); |
| 1901 |
v9fs_post_do_fsync(s, pdu, err); |
| 1902 |
} |
| 1903 |
|
| 1904 |
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
| 1905 |
{
|
| 1906 |
int32_t fid; |
| 1907 |
size_t offset = 7;
|
| 1908 |
int err;
|
| 1909 |
|
| 1910 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
| 1911 |
|
| 1912 |
err = free_fid(s, fid); |
| 1913 |
if (err < 0) { |
| 1914 |
goto out;
|
| 1915 |
} |
| 1916 |
|
| 1917 |
offset = 7;
|
| 1918 |
err = offset; |
| 1919 |
out:
|
| 1920 |
complete_pdu(s, pdu, err); |
| 1921 |
} |
| 1922 |
|
| 1923 |
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
| 1924 |
|
| 1925 |
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
| 1926 |
{
|
| 1927 |
if (err) {
|
| 1928 |
goto out;
|
| 1929 |
} |
| 1930 |
v9fs_stat_free(&vs->v9stat); |
| 1931 |
v9fs_string_free(&vs->name); |
| 1932 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
| 1933 |
vs->offset += vs->count; |
| 1934 |
err = vs->offset; |
| 1935 |
out:
|
| 1936 |
complete_pdu(s, vs->pdu, err); |
| 1937 |
qemu_free(vs); |
| 1938 |
return;
|
| 1939 |
} |
| 1940 |
|
| 1941 |
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, |
| 1942 |
ssize_t err) |
| 1943 |
{
|
| 1944 |
if (err) {
|
| 1945 |
err = -errno; |
| 1946 |
goto out;
|
| 1947 |
} |
| 1948 |
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); |
| 1949 |
if (err) {
|
| 1950 |
goto out;
|
| 1951 |
} |
| 1952 |
|
| 1953 |
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", |
| 1954 |
&vs->v9stat); |
| 1955 |
if ((vs->len != (vs->v9stat.size + 2)) || |
| 1956 |
((vs->count + vs->len) > vs->max_count)) {
|
| 1957 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
| 1958 |
v9fs_read_post_seekdir(s, vs, err); |
| 1959 |
return;
|
| 1960 |
} |
| 1961 |
vs->count += vs->len; |
| 1962 |
v9fs_stat_free(&vs->v9stat); |
| 1963 |
v9fs_string_free(&vs->name); |
| 1964 |
vs->dir_pos = vs->dent->d_off; |
| 1965 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
| 1966 |
v9fs_read_post_readdir(s, vs, err); |
| 1967 |
return;
|
| 1968 |
out:
|
| 1969 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
| 1970 |
v9fs_read_post_seekdir(s, vs, err); |
| 1971 |
return;
|
| 1972 |
|
| 1973 |
} |
| 1974 |
|
| 1975 |
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
| 1976 |
{
|
| 1977 |
if (vs->dent) {
|
| 1978 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
| 1979 |
v9fs_string_init(&vs->name); |
| 1980 |
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
| 1981 |
vs->dent->d_name); |
| 1982 |
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); |
| 1983 |
v9fs_read_post_dir_lstat(s, vs, err); |
| 1984 |
return;
|
| 1985 |
} |
| 1986 |
|
| 1987 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
| 1988 |
vs->offset += vs->count; |
| 1989 |
err = vs->offset; |
| 1990 |
complete_pdu(s, vs->pdu, err); |
| 1991 |
qemu_free(vs); |
| 1992 |
return;
|
| 1993 |
} |
| 1994 |
|
| 1995 |
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
| 1996 |
{
|
| 1997 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
| 1998 |
v9fs_read_post_readdir(s, vs, err); |
| 1999 |
return;
|
| 2000 |
} |
| 2001 |
|
| 2002 |
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, |
| 2003 |
ssize_t err) |
| 2004 |
{
|
| 2005 |
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
| 2006 |
v9fs_read_post_telldir(s, vs, err); |
| 2007 |
return;
|
| 2008 |
} |
| 2009 |
|
| 2010 |
static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
| 2011 |
{
|
| 2012 |
if (err < 0) { |
| 2013 |
/* IO error return the error */
|
| 2014 |
err = -errno; |
| 2015 |
goto out;
|
| 2016 |
} |
| 2017 |
vs->total += vs->len; |
| 2018 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
| 2019 |
if (vs->total < vs->count && vs->len > 0) { |
| 2020 |
do {
|
| 2021 |
if (0) { |
| 2022 |
print_sg(vs->sg, vs->cnt); |
| 2023 |
} |
| 2024 |
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
| 2025 |
vs->off); |
| 2026 |
if (vs->len > 0) { |
| 2027 |
vs->off += vs->len; |
| 2028 |
} |
| 2029 |
} while (vs->len == -1 && errno == EINTR); |
| 2030 |
if (vs->len == -1) { |
| 2031 |
err = -errno; |
| 2032 |
} |
| 2033 |
v9fs_read_post_preadv(s, vs, err); |
| 2034 |
return;
|
| 2035 |
} |
| 2036 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
| 2037 |
vs->offset += vs->count; |
| 2038 |
err = vs->offset; |
| 2039 |
|
| 2040 |
out:
|
| 2041 |
complete_pdu(s, vs->pdu, err); |
| 2042 |
qemu_free(vs); |
| 2043 |
} |
| 2044 |
|
| 2045 |
static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
| 2046 |
{
|
| 2047 |
ssize_t err = 0;
|
| 2048 |
int read_count;
|
| 2049 |
int64_t xattr_len; |
| 2050 |
|
| 2051 |
xattr_len = vs->fidp->fs.xattr.len; |
| 2052 |
read_count = xattr_len - vs->off; |
| 2053 |
if (read_count > vs->count) {
|
| 2054 |
read_count = vs->count; |
| 2055 |
} else if (read_count < 0) { |
| 2056 |
/*
|
| 2057 |
* read beyond XATTR value
|
| 2058 |
*/
|
| 2059 |
read_count = 0;
|
| 2060 |
} |
| 2061 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
|
| 2062 |
vs->offset += pdu_pack(vs->pdu, vs->offset, |
| 2063 |
((char *)vs->fidp->fs.xattr.value) + vs->off,
|
| 2064 |
read_count); |
| 2065 |
err = vs->offset; |
| 2066 |
complete_pdu(s, vs->pdu, err); |
| 2067 |
qemu_free(vs); |
| 2068 |
} |
| 2069 |
|
| 2070 |
static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
| 2071 |
{
|
| 2072 |
int32_t fid; |
| 2073 |
V9fsReadState *vs; |
| 2074 |
ssize_t err = 0;
|
| 2075 |
|
| 2076 |
vs = qemu_malloc(sizeof(*vs));
|
| 2077 |
vs->pdu = pdu; |
| 2078 |
vs->offset = 7;
|
| 2079 |
vs->total = 0;
|
| 2080 |
vs->len = 0;
|
| 2081 |
vs->count = 0;
|
| 2082 |
|
| 2083 |
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
| 2084 |
|
| 2085 |
vs->fidp = lookup_fid(s, fid); |
| 2086 |
if (vs->fidp == NULL) { |
| 2087 |
err = -EINVAL; |
| 2088 |
goto out;
|
| 2089 |
} |
| 2090 |
|
| 2091 |
if (vs->fidp->fid_type == P9_FID_DIR) {
|
| 2092 |
vs->max_count = vs->count; |
| 2093 |
vs->count = 0;
|
| 2094 |
if (vs->off == 0) { |
| 2095 |
v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
| 2096 |
} |
| 2097 |
v9fs_read_post_rewinddir(s, vs, err); |
| 2098 |
return;
|
| 2099 |
} else if (vs->fidp->fid_type == P9_FID_FILE) { |
| 2100 |
vs->sg = vs->iov; |
| 2101 |
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); |
| 2102 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
| 2103 |
if (vs->total <= vs->count) {
|
| 2104 |
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
| 2105 |
vs->off); |
| 2106 |
if (vs->len > 0) { |
| 2107 |
vs->off += vs->len; |
| 2108 |
} |
| 2109 |
err = vs->len; |
| 2110 |
v9fs_read_post_preadv(s, vs, err); |
| 2111 |
} |
| 2112 |
return;
|
| 2113 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
| 2114 |
v9fs_xattr_read(s, vs); |
| 2115 |
return;
|
| 2116 |
} else {
|
| 2117 |
err = -EINVAL; |
| 2118 |
} |
| 2119 |
out:
|
| 2120 |
complete_pdu(s, pdu, err); |
| 2121 |
qemu_free(vs); |
| 2122 |
} |
| 2123 |
|
| 2124 |
typedef struct V9fsReadDirState { |
| 2125 |
V9fsPDU *pdu; |
| 2126 |
V9fsFidState *fidp; |
| 2127 |
V9fsQID qid; |
| 2128 |
off_t saved_dir_pos; |
| 2129 |
struct dirent *dent;
|
| 2130 |
int32_t count; |
| 2131 |
int32_t max_count; |
| 2132 |
size_t offset; |
| 2133 |
int64_t initial_offset; |
| 2134 |
V9fsString name; |
| 2135 |
} V9fsReadDirState; |
| 2136 |
|
| 2137 |
static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs) |
| 2138 |
{
|
| 2139 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
| 2140 |
vs->offset += vs->count; |
| 2141 |
complete_pdu(s, vs->pdu, vs->offset); |
| 2142 |
qemu_free(vs); |
| 2143 |
return;
|
| 2144 |
} |
| 2145 |
|
| 2146 |
/* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
| 2147 |
* size of type (1) + size of name.size (2) + strlen(name.data)
|
| 2148 |
*/
|
| 2149 |
#define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data)) |
| 2150 |
|
| 2151 |
static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs) |
| 2152 |
{
|
| 2153 |
int len;
|
| 2154 |
size_t size; |
| 2155 |
|
| 2156 |
if (vs->dent) {
|
| 2157 |
v9fs_string_init(&vs->name); |
| 2158 |
v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name);
|
| 2159 |
|
| 2160 |
if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
|
| 2161 |
/* Ran out of buffer. Set dir back to old position and return */
|
| 2162 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos); |
| 2163 |
v9fs_readdir_post_seekdir(s, vs); |
| 2164 |
return;
|
| 2165 |
} |
| 2166 |
|
| 2167 |
/* Fill up just the path field of qid because the client uses
|
| 2168 |
* only that. To fill the entire qid structure we will have
|
| 2169 |
* to stat each dirent found, which is expensive
|
| 2170 |
*/
|
| 2171 |
size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path)); |
| 2172 |
memcpy(&vs->qid.path, &vs->dent->d_ino, size); |
| 2173 |
/* Fill the other fields with dummy values */
|
| 2174 |
vs->qid.type = 0;
|
| 2175 |
vs->qid.version = 0;
|
| 2176 |
|
| 2177 |
len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs", |
| 2178 |
&vs->qid, vs->dent->d_off, |
| 2179 |
vs->dent->d_type, &vs->name); |
| 2180 |
vs->count += len; |
| 2181 |
v9fs_string_free(&vs->name); |
| 2182 |
vs->saved_dir_pos = vs->dent->d_off; |
| 2183 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
| 2184 |
v9fs_readdir_post_readdir(s, vs); |
| 2185 |
return;
|
| 2186 |
} |
| 2187 |
|
| 2188 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
| 2189 |
vs->offset += vs->count; |
| 2190 |
complete_pdu(s, vs->pdu, vs->offset); |
| 2191 |
qemu_free(vs); |
| 2192 |
return;
|
| 2193 |
} |
| 2194 |
|
| 2195 |
static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs) |
| 2196 |
{
|
| 2197 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
| 2198 |
v9fs_readdir_post_readdir(s, vs); |
| 2199 |
return;
|
| 2200 |
} |
| 2201 |
|
| 2202 |
static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs) |
| 2203 |
{
|
| 2204 |
vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
| 2205 |
v9fs_readdir_post_telldir(s, vs); |
| 2206 |
return;
|
| 2207 |
} |
| 2208 |
|
| 2209 |
static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu) |
| 2210 |
{
|
| 2211 |
int32_t fid; |
| 2212 |
V9fsReadDirState *vs; |
| 2213 |
ssize_t err = 0;
|
| 2214 |
size_t offset = 7;
|
| 2215 |
|
| 2216 |
vs = qemu_malloc(sizeof(*vs));
|
| 2217 |
vs->pdu = pdu; |
| 2218 |
vs->offset = 7;
|
| 2219 |
vs->count = 0;
|
| 2220 |
|
| 2221 |
pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset,
|
| 2222 |
&vs->max_count); |
| 2223 |
|
| 2224 |
vs->fidp = lookup_fid(s, fid); |
| 2225 |
if (vs->fidp == NULL || !(vs->fidp->fs.dir)) { |
| 2226 |
err = -EINVAL; |
| 2227 |
goto out;
|
| 2228 |
} |
| 2229 |
|
| 2230 |
if (vs->initial_offset == 0) { |
| 2231 |
v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
| 2232 |
} else {
|
| 2233 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset); |
| 2234 |
} |
| 2235 |
|
| 2236 |
v9fs_readdir_post_setdir(s, vs); |
| 2237 |
return;
|
| 2238 |
|
| 2239 |
out:
|
| 2240 |
complete_pdu(s, pdu, err); |
| 2241 |
qemu_free(vs); |
| 2242 |
return;
|
| 2243 |
} |
| 2244 |
|
| 2245 |
static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs, |
| 2246 |
ssize_t err) |
| 2247 |
{
|
| 2248 |
if (err < 0) { |
| 2249 |
/* IO error return the error */
|
| 2250 |
err = -errno; |
| 2251 |
goto out;
|
| 2252 |
} |
| 2253 |
vs->total += vs->len; |
| 2254 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
| 2255 |
if (vs->total < vs->count && vs->len > 0) { |
| 2256 |
do {
|
| 2257 |
if (0) { |
| 2258 |
print_sg(vs->sg, vs->cnt); |
| 2259 |
} |
| 2260 |
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
| 2261 |
vs->off); |
| 2262 |
if (vs->len > 0) { |
| 2263 |
vs->off += vs->len; |
| 2264 |
} |
| 2265 |
} while (vs->len == -1 && errno == EINTR); |
| 2266 |
if (vs->len == -1) { |
| 2267 |
err = -errno; |
| 2268 |
} |
| 2269 |
v9fs_write_post_pwritev(s, vs, err); |
| 2270 |
return;
|
| 2271 |
} |
| 2272 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
| 2273 |
err = vs->offset; |
| 2274 |
out:
|
| 2275 |
complete_pdu(s, vs->pdu, err); |
| 2276 |
qemu_free(vs); |
| 2277 |
} |
| 2278 |
|
| 2279 |
static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
| 2280 |
{
|
| 2281 |
int i, to_copy;
|
| 2282 |
ssize_t err = 0;
|
| 2283 |
int write_count;
|
| 2284 |
int64_t xattr_len; |
| 2285 |
|
| 2286 |
xattr_len = vs->fidp->fs.xattr.len; |
| 2287 |
write_count = xattr_len - vs->off; |
| 2288 |
if (write_count > vs->count) {
|
| 2289 |
write_count = vs->count; |
| 2290 |
} else if (write_count < 0) { |
| 2291 |
/*
|
| 2292 |
* write beyond XATTR value len specified in
|
| 2293 |
* xattrcreate
|
| 2294 |
*/
|
| 2295 |
err = -ENOSPC; |
| 2296 |
goto out;
|
| 2297 |
} |
| 2298 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count);
|
| 2299 |
err = vs->offset; |
| 2300 |
vs->fidp->fs.xattr.copied_len += write_count; |
| 2301 |
/*
|
| 2302 |
* Now copy the content from sg list
|
| 2303 |
*/
|
| 2304 |
for (i = 0; i < vs->cnt; i++) { |
| 2305 |
if (write_count > vs->sg[i].iov_len) {
|
| 2306 |
to_copy = vs->sg[i].iov_len; |
| 2307 |
} else {
|
| 2308 |
to_copy = write_count; |
| 2309 |
} |
| 2310 |
memcpy((char *)vs->fidp->fs.xattr.value + vs->off,
|
| 2311 |
vs->sg[i].iov_base, to_copy); |
| 2312 |
/* updating vs->off since we are not using below */
|
| 2313 |
vs->off += to_copy; |
| 2314 |
write_count -= to_copy; |
| 2315 |
} |
| 2316 |
out:
|
| 2317 |
complete_pdu(s, vs->pdu, err); |
| 2318 |
qemu_free(vs); |
| 2319 |
} |
| 2320 |
|
| 2321 |
static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
| 2322 |
{
|
| 2323 |
int32_t fid; |
| 2324 |
V9fsWriteState *vs; |
| 2325 |
ssize_t err; |
| 2326 |
|
| 2327 |
vs = qemu_malloc(sizeof(*vs));
|
| 2328 |
|
| 2329 |
vs->pdu = pdu; |
| 2330 |
vs->offset = 7;
|
| 2331 |
vs->sg = vs->iov; |
| 2332 |
vs->total = 0;
|
| 2333 |
vs->len = 0;
|
| 2334 |
|
| 2335 |
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
| 2336 |
vs->sg, &vs->cnt); |
| 2337 |
|
| 2338 |
vs->fidp = lookup_fid(s, fid); |
| 2339 |
if (vs->fidp == NULL) { |
| 2340 |
err = -EINVAL; |
| 2341 |
goto out;
|
| 2342 |
} |
| 2343 |
|
| 2344 |
if (vs->fidp->fid_type == P9_FID_FILE) {
|
| 2345 |
if (vs->fidp->fs.fd == -1) { |
| 2346 |
err = -EINVAL; |
| 2347 |
goto out;
|
| 2348 |
} |
| 2349 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
| 2350 |
/*
|
| 2351 |
* setxattr operation
|
| 2352 |
*/
|
| 2353 |
v9fs_xattr_write(s, vs); |
| 2354 |
return;
|
| 2355 |
} else {
|
| 2356 |
err = -EINVAL; |
| 2357 |
goto out;
|
| 2358 |
} |
| 2359 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
| 2360 |
if (vs->total <= vs->count) {
|
| 2361 |
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off); |
| 2362 |
if (vs->len > 0) { |
| 2363 |
vs->off += vs->len; |
| 2364 |
} |
| 2365 |
err = vs->len; |
| 2366 |
v9fs_write_post_pwritev(s, vs, err); |
| 2367 |
} |
| 2368 |
return;
|
| 2369 |
out:
|
| 2370 |
complete_pdu(s, vs->pdu, err); |
| 2371 |
qemu_free(vs); |
| 2372 |
} |
| 2373 |
|
| 2374 |
static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
| 2375 |
{
|
| 2376 |
int err;
|
| 2377 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
| 2378 |
stat_to_qid(&vs->stbuf, &vs->qid); |
| 2379 |
|
| 2380 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
| 2381 |
err = vs->offset; |
| 2382 |
|
| 2383 |
complete_pdu(s, vs->pdu, err); |
| 2384 |
v9fs_string_free(&vs->name); |
| 2385 |
v9fs_string_free(&vs->extension); |
| 2386 |
v9fs_string_free(&vs->fullname); |
| 2387 |
qemu_free(vs); |
| 2388 |
} |
| 2389 |
|
| 2390 |
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
| 2391 |
{
|
| 2392 |
if (err == 0) { |
| 2393 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
| 2394 |
v9fs_create_post_getiounit(s, vs); |
| 2395 |
return;
|
| 2396 |
} |
| 2397 |
|
| 2398 |
complete_pdu(s, vs->pdu, err); |
| 2399 |
v9fs_string_free(&vs->name); |
| 2400 |
v9fs_string_free(&vs->extension); |
| 2401 |
v9fs_string_free(&vs->fullname); |
| 2402 |
qemu_free(vs); |
| 2403 |
} |
| 2404 |
|
| 2405 |
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) |
| 2406 |
{
|
| 2407 |
if (err) {
|
| 2408 |
err = -errno; |
| 2409 |
} |
| 2410 |
v9fs_post_create(s, vs, err); |
| 2411 |
} |
| 2412 |
|
| 2413 |
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, |
| 2414 |
int err)
|
| 2415 |
{
|
| 2416 |
if (!vs->fidp->fs.dir) {
|
| 2417 |
err = -errno; |
| 2418 |
} |
| 2419 |
vs->fidp->fid_type = P9_FID_DIR; |
| 2420 |
v9fs_post_create(s, vs, err); |
| 2421 |
} |
| 2422 |
|
| 2423 |
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, |
| 2424 |
int err)
|
| 2425 |
{
|
| 2426 |
if (err) {
|
| 2427 |
err = -errno; |
| 2428 |
goto out;
|
| 2429 |
} |
| 2430 |
|
| 2431 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname); |
| 2432 |
v9fs_create_post_opendir(s, vs, err); |
| 2433 |
return;
|
| 2434 |
|
| 2435 |
out:
|
| 2436 |
v9fs_post_create(s, vs, err); |
| 2437 |
} |
| 2438 |
|
| 2439 |
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) |
| 2440 |
{
|
| 2441 |
if (err) {
|
| 2442 |
err = -errno; |
| 2443 |
goto out;
|
| 2444 |
} |
| 2445 |
|
| 2446 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
| 2447 |
v9fs_create_post_dir_lstat(s, vs, err); |
| 2448 |
return;
|
| 2449 |
|
| 2450 |
out:
|
| 2451 |
v9fs_post_create(s, vs, err); |
| 2452 |
} |
| 2453 |
|
| 2454 |
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
| 2455 |
{
|
| 2456 |
if (err) {
|
| 2457 |
vs->fidp->fid_type = P9_FID_NONE; |
| 2458 |
close(vs->fidp->fs.fd); |
| 2459 |
err = -errno; |
| 2460 |
} |
| 2461 |
v9fs_post_create(s, vs, err); |
| 2462 |
return;
|
| 2463 |
} |
| 2464 |
|
| 2465 |
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) |
| 2466 |
{
|
| 2467 |
if (vs->fidp->fs.fd == -1) { |
| 2468 |
err = -errno; |
| 2469 |
goto out;
|
| 2470 |
} |
| 2471 |
vs->fidp->fid_type = P9_FID_FILE; |
| 2472 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
| 2473 |
v9fs_create_post_fstat(s, vs, err); |
| 2474 |
|
| 2475 |
return;
|
| 2476 |
|
| 2477 |
out:
|
| 2478 |
v9fs_post_create(s, vs, err); |
| 2479 |
|
| 2480 |
} |
| 2481 |
|
| 2482 |
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) |
| 2483 |
{
|
| 2484 |
|
| 2485 |
if (err == 0 || errno != ENOENT) { |
| 2486 |
err = -errno; |
| 2487 |
goto out;
|
| 2488 |
} |
| 2489 |
|
| 2490 |
if (vs->perm & P9_STAT_MODE_DIR) {
|
| 2491 |
err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777,
|
| 2492 |
vs->fidp->uid, -1);
|
| 2493 |
v9fs_create_post_mkdir(s, vs, err); |
| 2494 |
} else if (vs->perm & P9_STAT_MODE_SYMLINK) { |
| 2495 |
err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
| 2496 |
vs->fullname.data, -1);
|
| 2497 |
v9fs_create_post_perms(s, vs, err); |
| 2498 |
} else if (vs->perm & P9_STAT_MODE_LINK) { |
| 2499 |
int32_t nfid = atoi(vs->extension.data); |
| 2500 |
V9fsFidState *nfidp = lookup_fid(s, nfid); |
| 2501 |
if (nfidp == NULL) { |
| 2502 |
err = -errno; |
| 2503 |
v9fs_post_create(s, vs, err); |
| 2504 |
} |
| 2505 |
err = v9fs_do_link(s, &nfidp->path, &vs->fullname); |
| 2506 |
v9fs_create_post_perms(s, vs, err); |
| 2507 |
} else if (vs->perm & P9_STAT_MODE_DEVICE) { |
| 2508 |
char ctype;
|
| 2509 |
uint32_t major, minor; |
| 2510 |
mode_t nmode = 0;
|
| 2511 |
|
| 2512 |
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, |
| 2513 |
&minor) != 3) {
|
| 2514 |
err = -errno; |
| 2515 |
v9fs_post_create(s, vs, err); |
| 2516 |
} |
| 2517 |
|
| 2518 |
switch (ctype) {
|
| 2519 |
case 'c': |
| 2520 |
nmode = S_IFCHR; |
| 2521 |
break;
|
| 2522 |
case 'b': |
| 2523 |
nmode = S_IFBLK; |
| 2524 |
break;
|
| 2525 |
default:
|
| 2526 |
err = -EIO; |
| 2527 |
v9fs_post_create(s, vs, err); |
| 2528 |
} |
| 2529 |
|
| 2530 |
nmode |= vs->perm & 0777;
|
| 2531 |
err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
| 2532 |
makedev(major, minor), vs->fidp->uid, -1);
|
| 2533 |
v9fs_create_post_perms(s, vs, err); |
| 2534 |
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { |
| 2535 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
|
| 2536 |
0, vs->fidp->uid, -1); |
| 2537 |
v9fs_post_create(s, vs, err); |
| 2538 |
} else if (vs->perm & P9_STAT_MODE_SOCKET) { |
| 2539 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
|
| 2540 |
0, vs->fidp->uid, -1); |
| 2541 |
v9fs_post_create(s, vs, err); |
| 2542 |
} else {
|
| 2543 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
| 2544 |
-1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
|
| 2545 |
|
| 2546 |
v9fs_create_post_open2(s, vs, err); |
| 2547 |
} |
| 2548 |
|
| 2549 |
return;
|
| 2550 |
|
| 2551 |
out:
|
| 2552 |
v9fs_post_create(s, vs, err); |
| 2553 |
} |
| 2554 |
|
| 2555 |
static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
| 2556 |
{
|
| 2557 |
int32_t fid; |
| 2558 |
V9fsCreateState *vs; |
| 2559 |
int err = 0; |
| 2560 |
|
| 2561 |
vs = qemu_malloc(sizeof(*vs));
|
| 2562 |
vs->pdu = pdu; |
| 2563 |
vs->offset = 7;
|
| 2564 |
|
| 2565 |
v9fs_string_init(&vs->fullname); |
| 2566 |
|
| 2567 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
| 2568 |
&vs->perm, &vs->mode, &vs->extension); |
| 2569 |
|
| 2570 |
vs->fidp = lookup_fid(s, fid); |
| 2571 |
if (vs->fidp == NULL) { |
| 2572 |
err = -EINVAL; |
| 2573 |
goto out;
|
| 2574 |
} |
| 2575 |
|
| 2576 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
| 2577 |
vs->name.data); |
| 2578 |
|
| 2579 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
| 2580 |
v9fs_create_post_lstat(s, vs, err); |
| 2581 |
return;
|
| 2582 |
|
| 2583 |
out:
|
| 2584 |
complete_pdu(s, vs->pdu, err); |
| 2585 |
v9fs_string_free(&vs->name); |
| 2586 |
v9fs_string_free(&vs->extension); |
| 2587 |
qemu_free(vs); |
| 2588 |
} |
| 2589 |
|
| 2590 |
static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
| 2591 |
{
|
| 2592 |
if (err == 0) { |
| 2593 |
stat_to_qid(&vs->stbuf, &vs->qid); |
| 2594 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
| 2595 |
err = vs->offset; |
| 2596 |
} else {
|
| 2597 |
err = -errno; |
| 2598 |
} |
| 2599 |
complete_pdu(s, vs->pdu, err); |
| 2600 |
v9fs_string_free(&vs->name); |
| 2601 |
v9fs_string_free(&vs->symname); |
| 2602 |
v9fs_string_free(&vs->fullname); |
| 2603 |
qemu_free(vs); |
| 2604 |
} |
| 2605 |
|
| 2606 |
static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, |
| 2607 |
int err)
|
| 2608 |
{
|
| 2609 |
if (err) {
|
| 2610 |
goto out;
|
| 2611 |
} |
| 2612 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
| 2613 |
out:
|
| 2614 |
v9fs_post_symlink(s, vs, err); |
| 2615 |
} |
| 2616 |
|
| 2617 |
static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu) |
| 2618 |
{
|
| 2619 |
int32_t dfid; |
| 2620 |
V9fsSymlinkState *vs; |
| 2621 |
int err = 0; |
| 2622 |
gid_t gid; |
| 2623 |
|
| 2624 |
vs = qemu_malloc(sizeof(*vs));
|
| 2625 |
vs->pdu = pdu; |
| 2626 |
vs->offset = 7;
|
| 2627 |
|
| 2628 |
v9fs_string_init(&vs->fullname); |
| 2629 |
|
| 2630 |
pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
|
| 2631 |
&vs->symname, &gid); |
| 2632 |
|
| 2633 |
vs->dfidp = lookup_fid(s, dfid); |
| 2634 |
if (vs->dfidp == NULL) { |
| 2635 |
err = -EINVAL; |
| 2636 |
goto out;
|
| 2637 |
} |
| 2638 |
|
| 2639 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
|
| 2640 |
vs->name.data); |
| 2641 |
err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, |
| 2642 |
vs->fullname.data, gid); |
| 2643 |
v9fs_symlink_post_do_symlink(s, vs, err); |
| 2644 |
return;
|
| 2645 |
|
| 2646 |
out:
|
| 2647 |
complete_pdu(s, vs->pdu, err); |
| 2648 |
v9fs_string_free(&vs->name); |
| 2649 |
v9fs_string_free(&vs->symname); |
| 2650 |
qemu_free(vs); |
| 2651 |
} |
| 2652 |
|
| 2653 |
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
| 2654 |
{
|
| 2655 |
/* A nop call with no return */
|
| 2656 |
complete_pdu(s, pdu, 7);
|
| 2657 |
} |
| 2658 |
|
| 2659 |
static void v9fs_link(V9fsState *s, V9fsPDU *pdu) |
| 2660 |
{
|
| 2661 |
int32_t dfid, oldfid; |
| 2662 |
V9fsFidState *dfidp, *oldfidp; |
| 2663 |
V9fsString name, fullname; |
| 2664 |
size_t offset = 7;
|
| 2665 |
int err = 0; |
| 2666 |
|
| 2667 |
v9fs_string_init(&fullname); |
| 2668 |
|
| 2669 |
pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
|
| 2670 |
|
| 2671 |
dfidp = lookup_fid(s, dfid); |
| 2672 |
if (dfidp == NULL) { |
| 2673 |
err = -errno; |
| 2674 |
goto out;
|
| 2675 |
} |
| 2676 |
|
| 2677 |
oldfidp = lookup_fid(s, oldfid); |
| 2678 |
if (oldfidp == NULL) { |
| 2679 |
err = -errno; |
| 2680 |
goto out;
|
| 2681 |
} |
| 2682 |
|
| 2683 |
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
|
| 2684 |
err = offset; |
| 2685 |
err = v9fs_do_link(s, &oldfidp->path, &fullname); |
| 2686 |
if (err) {
|
| 2687 |
err = -errno; |
| 2688 |
} |
| 2689 |
v9fs_string_free(&fullname); |
| 2690 |
|
| 2691 |
out:
|
| 2692 |
v9fs_string_free(&name); |
| 2693 |
complete_pdu(s, pdu, err); |
| 2694 |
} |
| 2695 |
|
| 2696 |
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
| 2697 |
int err)
|
| 2698 |
{
|
| 2699 |
if (err < 0) { |
| 2700 |
err = -errno; |
| 2701 |
} else {
|
| 2702 |
err = vs->offset; |
| 2703 |
} |
| 2704 |
|
| 2705 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
| 2706 |
free_fid(s, vs->fidp->fid); |
| 2707 |
|
| 2708 |
complete_pdu(s, vs->pdu, err); |
| 2709 |
qemu_free(vs); |
| 2710 |
} |
| 2711 |
|
| 2712 |
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
| 2713 |
{
|
| 2714 |
int32_t fid; |
| 2715 |
V9fsRemoveState *vs; |
| 2716 |
int err = 0; |
| 2717 |
|
| 2718 |
vs = qemu_malloc(sizeof(*vs));
|
| 2719 |
vs->pdu = pdu; |
| 2720 |
vs->offset = 7;
|
| 2721 |
|
| 2722 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
| 2723 |
|
| 2724 |
vs->fidp = lookup_fid(s, fid); |
| 2725 |
if (vs->fidp == NULL) { |
| 2726 |
err = -EINVAL; |
| 2727 |
goto out;
|
| 2728 |
} |
| 2729 |
|
| 2730 |
err = v9fs_do_remove(s, &vs->fidp->path); |
| 2731 |
v9fs_remove_post_remove(s, vs, err); |
| 2732 |
return;
|
| 2733 |
|
| 2734 |
out:
|
| 2735 |
complete_pdu(s, pdu, err); |
| 2736 |
qemu_free(vs); |
| 2737 |
} |
| 2738 |
|
| 2739 |
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
| 2740 |
{
|
| 2741 |
if (err < 0) { |
| 2742 |
goto out;
|
| 2743 |
} |
| 2744 |
|
| 2745 |
err = vs->offset; |
| 2746 |
|
| 2747 |
out:
|
| 2748 |
v9fs_stat_free(&vs->v9stat); |
| 2749 |
complete_pdu(s, vs->pdu, err); |
| 2750 |
qemu_free(vs); |
| 2751 |
} |
| 2752 |
|
| 2753 |
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) |
| 2754 |
{
|
| 2755 |
if (err < 0) { |
| 2756 |
goto out;
|
| 2757 |
} |
| 2758 |
if (vs->v9stat.length != -1) { |
| 2759 |
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { |
| 2760 |
err = -errno; |
| 2761 |
} |
| 2762 |
} |
| 2763 |
v9fs_wstat_post_truncate(s, vs, err); |
| 2764 |
return;
|
| 2765 |
|
| 2766 |
out:
|
| 2767 |
v9fs_stat_free(&vs->v9stat); |
| 2768 |
complete_pdu(s, vs->pdu, err); |
| 2769 |
qemu_free(vs); |
| 2770 |
} |
| 2771 |
|
| 2772 |
static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs) |
| 2773 |
{
|
| 2774 |
int err = 0; |
| 2775 |
char *old_name, *new_name;
|
| 2776 |
char *end;
|
| 2777 |
|
| 2778 |
if (vs->newdirfid != -1) { |
| 2779 |
V9fsFidState *dirfidp; |
| 2780 |
dirfidp = lookup_fid(s, vs->newdirfid); |
| 2781 |
|
| 2782 |
if (dirfidp == NULL) { |
| 2783 |
err = -ENOENT; |
| 2784 |
goto out;
|
| 2785 |
} |
| 2786 |
|
| 2787 |
BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
| 2788 |
|
| 2789 |
new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2);
|
| 2790 |
|
| 2791 |
strcpy(new_name, dirfidp->path.data); |
| 2792 |
strcat(new_name, "/");
|
| 2793 |
strcat(new_name + dirfidp->path.size, vs->name.data); |
| 2794 |
} else {
|
| 2795 |
old_name = vs->fidp->path.data; |
| 2796 |
end = strrchr(old_name, '/');
|
| 2797 |
if (end) {
|
| 2798 |
end++; |
| 2799 |
} else {
|
| 2800 |
end = old_name; |
| 2801 |
} |
| 2802 |
new_name = qemu_mallocz(end - old_name + vs->name.size + 1);
|
| 2803 |
|
| 2804 |
strncat(new_name, old_name, end - old_name); |
| 2805 |
strncat(new_name + (end - old_name), vs->name.data, vs->name.size); |
| 2806 |
} |
| 2807 |
|
| 2808 |
v9fs_string_free(&vs->name); |
| 2809 |
vs->name.data = qemu_strdup(new_name); |
| 2810 |
vs->name.size = strlen(new_name); |
| 2811 |
|
| 2812 |
if (strcmp(new_name, vs->fidp->path.data) != 0) { |
| 2813 |
if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) {
|
| 2814 |
err = -errno; |
| 2815 |
} else {
|
| 2816 |
V9fsFidState *fidp; |
| 2817 |
/*
|
| 2818 |
* Fixup fid's pointing to the old name to
|
| 2819 |
* start pointing to the new name
|
| 2820 |
*/
|
| 2821 |
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
| 2822 |
if (vs->fidp == fidp) {
|
| 2823 |
/*
|
| 2824 |
* we replace name of this fid towards the end so
|
| 2825 |
* that our below v9fs_path_is_ancestor check will
|
| 2826 |
* work
|
| 2827 |
*/
|
| 2828 |
continue;
|
| 2829 |
} |
| 2830 |
if (v9fs_path_is_ancestor(&vs->fidp->path, &fidp->path)) {
|
| 2831 |
/* replace the name */
|
| 2832 |
v9fs_fix_path(&fidp->path, &vs->name, |
| 2833 |
strlen(vs->fidp->path.data)); |
| 2834 |
} |
| 2835 |
} |
| 2836 |
v9fs_string_copy(&vs->fidp->path, &vs->name); |
| 2837 |
} |
| 2838 |
} |
| 2839 |
out:
|
| 2840 |
v9fs_string_free(&vs->name); |
| 2841 |
return err;
|
| 2842 |
} |
| 2843 |
|
| 2844 |
static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err) |
| 2845 |
{
|
| 2846 |
complete_pdu(s, vs->pdu, err); |
| 2847 |
qemu_free(vs); |
| 2848 |
} |
| 2849 |
|
| 2850 |
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
| 2851 |
{
|
| 2852 |
if (err < 0) { |
| 2853 |
goto out;
|
| 2854 |
} |
| 2855 |
|
| 2856 |
if (vs->v9stat.name.size != 0) { |
| 2857 |
V9fsRenameState *vr; |
| 2858 |
|
| 2859 |
vr = qemu_mallocz(sizeof(V9fsRenameState));
|
| 2860 |
vr->newdirfid = -1;
|
| 2861 |
vr->pdu = vs->pdu; |
| 2862 |
vr->fidp = vs->fidp; |
| 2863 |
vr->offset = vs->offset; |
| 2864 |
vr->name.size = vs->v9stat.name.size; |
| 2865 |
vr->name.data = qemu_strdup(vs->v9stat.name.data); |
| 2866 |
|
| 2867 |
err = v9fs_complete_rename(s, vr); |
| 2868 |
qemu_free(vr); |
| 2869 |
} |
| 2870 |
v9fs_wstat_post_rename(s, vs, err); |
| 2871 |
return;
|
| 2872 |
|
| 2873 |
out:
|
| 2874 |
v9fs_stat_free(&vs->v9stat); |
| 2875 |
complete_pdu(s, vs->pdu, err); |
| 2876 |
qemu_free(vs); |
| 2877 |
} |
| 2878 |
|
| 2879 |
static void v9fs_rename(V9fsState *s, V9fsPDU *pdu) |
| 2880 |
{
|
| 2881 |
int32_t fid; |
| 2882 |
V9fsRenameState *vs; |
| 2883 |
ssize_t err = 0;
|
| 2884 |
|
| 2885 |
vs = qemu_malloc(sizeof(*vs));
|
| 2886 |
vs->pdu = pdu; |
| 2887 |
vs->offset = 7;
|
| 2888 |
|
| 2889 |
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name);
|
| 2890 |
|
| 2891 |
vs->fidp = lookup_fid(s, fid); |
| 2892 |
if (vs->fidp == NULL) { |
| 2893 |
err = -ENOENT; |
| 2894 |
goto out;
|
| 2895 |
} |
| 2896 |
|
| 2897 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
| 2898 |
|
| 2899 |
err = v9fs_complete_rename(s, vs); |
| 2900 |
v9fs_rename_post_rename(s, vs, err); |
| 2901 |
return;
|
| 2902 |
out:
|
| 2903 |
complete_pdu(s, vs->pdu, err); |
| 2904 |
qemu_free(vs); |
| 2905 |
} |
| 2906 |
|
| 2907 |
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
| 2908 |
{
|
| 2909 |
if (err < 0) { |
| 2910 |
goto out;
|
| 2911 |
} |
| 2912 |
|
| 2913 |
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
| 2914 |
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
| 2915 |
vs->v9stat.n_gid)) {
|
| 2916 |
err = -errno; |
| 2917 |
} |
| 2918 |
} |
| 2919 |
v9fs_wstat_post_chown(s, vs, err); |
| 2920 |
return;
|
| 2921 |
|
| 2922 |
out:
|
| 2923 |
v9fs_stat_free(&vs->v9stat); |
| 2924 |
complete_pdu(s, vs->pdu, err); |
| 2925 |
qemu_free(vs); |
| 2926 |
} |
| 2927 |
|
| 2928 |
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) |
| 2929 |
{
|
| 2930 |
if (err < 0) { |
| 2931 |
goto out;
|
| 2932 |
} |
| 2933 |
|
| 2934 |
if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
| 2935 |
struct timespec times[2]; |
| 2936 |
if (vs->v9stat.atime != -1) { |
| 2937 |
times[0].tv_sec = vs->v9stat.atime;
|
| 2938 |
times[0].tv_nsec = 0; |
| 2939 |
} else {
|
| 2940 |
times[0].tv_nsec = UTIME_OMIT;
|
| 2941 |
} |
| 2942 |
if (vs->v9stat.mtime != -1) { |
| 2943 |
times[1].tv_sec = vs->v9stat.mtime;
|
| 2944 |
times[1].tv_nsec = 0; |
| 2945 |
} else {
|
| 2946 |
times[1].tv_nsec = UTIME_OMIT;
|
| 2947 |
} |
| 2948 |
|
| 2949 |
if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
|
| 2950 |
err = -errno; |
| 2951 |
} |
| 2952 |
} |
| 2953 |
|
| 2954 |
v9fs_wstat_post_utime(s, vs, err); |
| 2955 |
return;
|
| 2956 |
|
| 2957 |
out:
|
| 2958 |
v9fs_stat_free(&vs->v9stat); |
| 2959 |
complete_pdu(s, vs->pdu, err); |
| 2960 |
qemu_free(vs); |
| 2961 |
} |
| 2962 |
|
| 2963 |
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) |
| 2964 |
{
|
| 2965 |
if (err == -1) { |
| 2966 |
err = -errno; |
| 2967 |
} |
| 2968 |
v9fs_stat_free(&vs->v9stat); |
| 2969 |
complete_pdu(s, vs->pdu, err); |
| 2970 |
qemu_free(vs); |
| 2971 |
} |
| 2972 |
|
| 2973 |
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) |
| 2974 |
{
|
| 2975 |
uint32_t v9_mode; |
| 2976 |
|
| 2977 |
if (err == -1) { |
| 2978 |
err = -errno; |
| 2979 |
goto out;
|
| 2980 |
} |
| 2981 |
|
| 2982 |
v9_mode = stat_to_v9mode(&vs->stbuf); |
| 2983 |
|
| 2984 |
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
| 2985 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) {
|
| 2986 |
/* Attempting to change the type */
|
| 2987 |
err = -EIO; |
| 2988 |
goto out;
|
| 2989 |
} |
| 2990 |
|
| 2991 |
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
| 2992 |
&vs->v9stat.extension))) {
|
| 2993 |
err = -errno; |
| 2994 |
} |
| 2995 |
v9fs_wstat_post_chmod(s, vs, err); |
| 2996 |
return;
|
| 2997 |
|
| 2998 |
out:
|
| 2999 |
v9fs_stat_free(&vs->v9stat); |
| 3000 |
complete_pdu(s, vs->pdu, err); |
| 3001 |
qemu_free(vs); |
| 3002 |
} |
| 3003 |
|
| 3004 |
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
| 3005 |
{
|
| 3006 |
int32_t fid; |
| 3007 |
V9fsWstatState *vs; |
| 3008 |
int err = 0; |
| 3009 |
|
| 3010 |
vs = qemu_malloc(sizeof(*vs));
|
| 3011 |
vs->pdu = pdu; |
| 3012 |
vs->offset = 7;
|
| 3013 |
|
| 3014 |
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
| 3015 |
|
| 3016 |
vs->fidp = lookup_fid(s, fid); |
| 3017 |
if (vs->fidp == NULL) { |
| 3018 |
err = -EINVAL; |
| 3019 |
goto out;
|
| 3020 |
} |
| 3021 |
|
| 3022 |
/* do we need to sync the file? */
|
| 3023 |
if (donttouch_stat(&vs->v9stat)) {
|
| 3024 |
err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0);
|
| 3025 |
v9fs_wstat_post_fsync(s, vs, err); |
| 3026 |
return;
|
| 3027 |
} |
| 3028 |
|
| 3029 |
if (vs->v9stat.mode != -1) { |
| 3030 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
| 3031 |
v9fs_wstat_post_lstat(s, vs, err); |
| 3032 |
return;
|
| 3033 |
} |
| 3034 |
|
| 3035 |
v9fs_wstat_post_chmod(s, vs, err); |
| 3036 |
return;
|
| 3037 |
|
| 3038 |
out:
|
| 3039 |
v9fs_stat_free(&vs->v9stat); |
| 3040 |
complete_pdu(s, vs->pdu, err); |
| 3041 |
qemu_free(vs); |
| 3042 |
} |
| 3043 |
|
| 3044 |
static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err) |
| 3045 |
{
|
| 3046 |
int32_t bsize_factor; |
| 3047 |
|
| 3048 |
if (err) {
|
| 3049 |
err = -errno; |
| 3050 |
goto out;
|
| 3051 |
} |
| 3052 |
|
| 3053 |
/*
|
| 3054 |
* compute bsize factor based on host file system block size
|
| 3055 |
* and client msize
|
| 3056 |
*/
|
| 3057 |
bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize; |
| 3058 |
if (!bsize_factor) {
|
| 3059 |
bsize_factor = 1;
|
| 3060 |
} |
| 3061 |
vs->v9statfs.f_type = vs->stbuf.f_type; |
| 3062 |
vs->v9statfs.f_bsize = vs->stbuf.f_bsize; |
| 3063 |
vs->v9statfs.f_bsize *= bsize_factor; |
| 3064 |
/*
|
| 3065 |
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
| 3066 |
* adjust(divide) the number of blocks, free blocks and available
|
| 3067 |
* blocks by bsize factor
|
| 3068 |
*/
|
| 3069 |
vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor; |
| 3070 |
vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor; |
| 3071 |
vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor; |
| 3072 |
vs->v9statfs.f_files = vs->stbuf.f_files; |
| 3073 |
vs->v9statfs.f_ffree = vs->stbuf.f_ffree; |
| 3074 |
vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] | |
| 3075 |
(unsigned long long)vs->stbuf.f_fsid.__val[1] << 32; |
| 3076 |
vs->v9statfs.f_namelen = vs->stbuf.f_namelen; |
| 3077 |
|
| 3078 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
|
| 3079 |
vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks, |
| 3080 |
vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files, |
| 3081 |
vs->v9statfs.f_ffree, vs->v9statfs.fsid_val, |
| 3082 |
vs->v9statfs.f_namelen); |
| 3083 |
|
| 3084 |
out:
|
| 3085 |
complete_pdu(s, vs->pdu, vs->offset); |
| 3086 |
qemu_free(vs); |
| 3087 |
} |
| 3088 |
|
| 3089 |
static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu) |
| 3090 |
{
|
| 3091 |
V9fsStatfsState *vs; |
| 3092 |
ssize_t err = 0;
|
| 3093 |
|
| 3094 |
vs = qemu_malloc(sizeof(*vs));
|
| 3095 |
vs->pdu = pdu; |
| 3096 |
vs->offset = 7;
|
| 3097 |
|
| 3098 |
memset(&vs->v9statfs, 0, sizeof(vs->v9statfs)); |
| 3099 |
|
| 3100 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
|
| 3101 |
|
| 3102 |
vs->fidp = lookup_fid(s, vs->fid); |
| 3103 |
if (vs->fidp == NULL) { |
| 3104 |
err = -ENOENT; |
| 3105 |
goto out;
|
| 3106 |
} |
| 3107 |
|
| 3108 |
err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf); |
| 3109 |
v9fs_statfs_post_statfs(s, vs, err); |
| 3110 |
return;
|
| 3111 |
|
| 3112 |
out:
|
| 3113 |
complete_pdu(s, vs->pdu, err); |
| 3114 |
qemu_free(vs); |
| 3115 |
} |
| 3116 |
|
| 3117 |
static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
| 3118 |
{
|
| 3119 |
if (err == -1) { |
| 3120 |
err = -errno; |
| 3121 |
goto out;
|
| 3122 |
} |
| 3123 |
|
| 3124 |
stat_to_qid(&vs->stbuf, &vs->qid); |
| 3125 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
| 3126 |
err = vs->offset; |
| 3127 |
out:
|
| 3128 |
complete_pdu(s, vs->pdu, err); |
| 3129 |
v9fs_string_free(&vs->fullname); |
| 3130 |
v9fs_string_free(&vs->name); |
| 3131 |
qemu_free(vs); |
| 3132 |
} |
| 3133 |
|
| 3134 |
static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err) |
| 3135 |
{
|
| 3136 |
if (err == -1) { |
| 3137 |
err = -errno; |
| 3138 |
goto out;
|
| 3139 |
} |
| 3140 |
|
| 3141 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
| 3142 |
v9fs_mknod_post_lstat(s, vs, err); |
| 3143 |
return;
|
| 3144 |
out:
|
| 3145 |
complete_pdu(s, vs->pdu, err); |
| 3146 |
v9fs_string_free(&vs->fullname); |
| 3147 |
v9fs_string_free(&vs->name); |
| 3148 |
qemu_free(vs); |
| 3149 |
} |
| 3150 |
|
| 3151 |
static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu) |
| 3152 |
{
|
| 3153 |
int32_t fid; |
| 3154 |
V9fsMkState *vs; |
| 3155 |
int err = 0; |
| 3156 |
V9fsFidState *fidp; |
| 3157 |
gid_t gid; |
| 3158 |
int mode;
|
| 3159 |
int major, minor;
|
| 3160 |
|
| 3161 |
vs = qemu_malloc(sizeof(*vs));
|
| 3162 |
vs->pdu = pdu; |
| 3163 |
vs->offset = 7;
|
| 3164 |
|
| 3165 |
v9fs_string_init(&vs->fullname); |
| 3166 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode,
|
| 3167 |
&major, &minor, &gid); |
| 3168 |
|
| 3169 |
fidp = lookup_fid(s, fid); |
| 3170 |
if (fidp == NULL) { |
| 3171 |
err = -ENOENT; |
| 3172 |
goto out;
|
| 3173 |
} |
| 3174 |
|
| 3175 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
| 3176 |
err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor), |
| 3177 |
fidp->uid, gid); |
| 3178 |
v9fs_mknod_post_mknod(s, vs, err); |
| 3179 |
return;
|
| 3180 |
|
| 3181 |
out:
|
| 3182 |
complete_pdu(s, vs->pdu, err); |
| 3183 |
v9fs_string_free(&vs->fullname); |
| 3184 |
v9fs_string_free(&vs->name); |
| 3185 |
qemu_free(vs); |
| 3186 |
} |
| 3187 |
|
| 3188 |
/*
|
| 3189 |
* Implement posix byte range locking code
|
| 3190 |
* Server side handling of locking code is very simple, because 9p server in
|
| 3191 |
* QEMU can handle only one client. And most of the lock handling
|
| 3192 |
* (like conflict, merging) etc is done by the VFS layer itself, so no need to
|
| 3193 |
* do any thing in * qemu 9p server side lock code path.
|
| 3194 |
* So when a TLOCK request comes, always return success
|
| 3195 |
*/
|
| 3196 |
|
| 3197 |
static void v9fs_lock(V9fsState *s, V9fsPDU *pdu) |
| 3198 |
{
|
| 3199 |
int32_t fid, err = 0;
|
| 3200 |
V9fsLockState *vs; |
| 3201 |
|
| 3202 |
vs = qemu_mallocz(sizeof(*vs));
|
| 3203 |
vs->pdu = pdu; |
| 3204 |
vs->offset = 7;
|
| 3205 |
|
| 3206 |
vs->flock = qemu_malloc(sizeof(*vs->flock));
|
| 3207 |
pdu_unmarshal(vs->pdu, vs->offset, "dbdqqds", &fid, &vs->flock->type,
|
| 3208 |
&vs->flock->flags, &vs->flock->start, &vs->flock->length, |
| 3209 |
&vs->flock->proc_id, &vs->flock->client_id); |
| 3210 |
|
| 3211 |
vs->status = P9_LOCK_ERROR; |
| 3212 |
|
| 3213 |
/* We support only block flag now (that too ignored currently) */
|
| 3214 |
if (vs->flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
|
| 3215 |
err = -EINVAL; |
| 3216 |
goto out;
|
| 3217 |
} |
| 3218 |
vs->fidp = lookup_fid(s, fid); |
| 3219 |
if (vs->fidp == NULL) { |
| 3220 |
err = -ENOENT; |
| 3221 |
goto out;
|
| 3222 |
} |
| 3223 |
|
| 3224 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
| 3225 |
if (err < 0) { |
| 3226 |
err = -errno; |
| 3227 |
goto out;
|
| 3228 |
} |
| 3229 |
vs->status = P9_LOCK_SUCCESS; |
| 3230 |
out:
|
| 3231 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "b", vs->status);
|
| 3232 |
complete_pdu(s, vs->pdu, err); |
| 3233 |
qemu_free(vs->flock); |
| 3234 |
qemu_free(vs); |
| 3235 |
} |
| 3236 |
|
| 3237 |
/*
|
| 3238 |
* When a TGETLOCK request comes, always return success because all lock
|
| 3239 |
* handling is done by client's VFS layer.
|
| 3240 |
*/
|
| 3241 |
|
| 3242 |
static void v9fs_getlock(V9fsState *s, V9fsPDU *pdu) |
| 3243 |
{
|
| 3244 |
int32_t fid, err = 0;
|
| 3245 |
V9fsGetlockState *vs; |
| 3246 |
|
| 3247 |
vs = qemu_mallocz(sizeof(*vs));
|
| 3248 |
vs->pdu = pdu; |
| 3249 |
vs->offset = 7;
|
| 3250 |
|
| 3251 |
vs->glock = qemu_malloc(sizeof(*vs->glock));
|
| 3252 |
pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type,
|
| 3253 |
&vs->glock->start, &vs->glock->length, &vs->glock->proc_id, |
| 3254 |
&vs->glock->client_id); |
| 3255 |
|
| 3256 |
vs->fidp = lookup_fid(s, fid); |
| 3257 |
if (vs->fidp == NULL) { |
| 3258 |
err = -ENOENT; |
| 3259 |
goto out;
|
| 3260 |
} |
| 3261 |
|
| 3262 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
| 3263 |
if (err < 0) { |
| 3264 |
err = -errno; |
| 3265 |
goto out;
|
| 3266 |
} |
| 3267 |
vs->glock->type = F_UNLCK; |
| 3268 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type,
|
| 3269 |
vs->glock->start, vs->glock->length, vs->glock->proc_id, |
| 3270 |
&vs->glock->client_id); |
| 3271 |
out:
|
| 3272 |
complete_pdu(s, vs->pdu, err); |
| 3273 |
qemu_free(vs->glock); |
| 3274 |
qemu_free(vs); |
| 3275 |
} |
| 3276 |
|
| 3277 |
static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
| 3278 |
{
|
| 3279 |
if (err == -1) { |
| 3280 |
err = -errno; |
| 3281 |
goto out;
|
| 3282 |
} |
| 3283 |
|
| 3284 |
stat_to_qid(&vs->stbuf, &vs->qid); |
| 3285 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
| 3286 |
err = vs->offset; |
| 3287 |
out:
|
| 3288 |
complete_pdu(s, vs->pdu, err); |
| 3289 |
v9fs_string_free(&vs->fullname); |
| 3290 |
v9fs_string_free(&vs->name); |
| 3291 |
qemu_free(vs); |
| 3292 |
} |
| 3293 |
|
| 3294 |
static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err) |
| 3295 |
{
|
| 3296 |
if (err == -1) { |
| 3297 |
err = -errno; |
| 3298 |
goto out;
|
| 3299 |
} |
| 3300 |
|
| 3301 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
| 3302 |
v9fs_mkdir_post_lstat(s, vs, err); |
| 3303 |
return;
|
| 3304 |
out:
|
| 3305 |
complete_pdu(s, vs->pdu, err); |
| 3306 |
v9fs_string_free(&vs->fullname); |
| 3307 |
v9fs_string_free(&vs->name); |
| 3308 |
qemu_free(vs); |
| 3309 |
} |
| 3310 |
|
| 3311 |
static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu) |
| 3312 |
{
|
| 3313 |
int32_t fid; |
| 3314 |
V9fsMkState *vs; |
| 3315 |
int err = 0; |
| 3316 |
V9fsFidState *fidp; |
| 3317 |
gid_t gid; |
| 3318 |
int mode;
|
| 3319 |
|
| 3320 |
vs = qemu_malloc(sizeof(*vs));
|
| 3321 |
vs->pdu = pdu; |
| 3322 |
vs->offset = 7;
|
| 3323 |
|
| 3324 |
v9fs_string_init(&vs->fullname); |
| 3325 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode,
|
| 3326 |
&gid); |
| 3327 |
|
| 3328 |
fidp = lookup_fid(s, fid); |
| 3329 |
if (fidp == NULL) { |
| 3330 |
err = -ENOENT; |
| 3331 |
goto out;
|
| 3332 |
} |
| 3333 |
|
| 3334 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
| 3335 |
err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid); |
| 3336 |
v9fs_mkdir_post_mkdir(s, vs, err); |
| 3337 |
return;
|
| 3338 |
|
| 3339 |
out:
|
| 3340 |
complete_pdu(s, vs->pdu, err); |
| 3341 |
v9fs_string_free(&vs->fullname); |
| 3342 |
v9fs_string_free(&vs->name); |
| 3343 |
qemu_free(vs); |
| 3344 |
} |
| 3345 |
|
| 3346 |
static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err) |
| 3347 |
{
|
| 3348 |
|
| 3349 |
if (err < 0) { |
| 3350 |
err = -errno; |
| 3351 |
free_fid(s, vs->xattr_fidp->fid); |
| 3352 |
goto out;
|
| 3353 |
} |
| 3354 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
| 3355 |
err = vs->offset; |
| 3356 |
out:
|
| 3357 |
complete_pdu(s, vs->pdu, err); |
| 3358 |
v9fs_string_free(&vs->name); |
| 3359 |
qemu_free(vs); |
| 3360 |
return;
|
| 3361 |
} |
| 3362 |
|
| 3363 |
static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err) |
| 3364 |
{
|
| 3365 |
if (err < 0) { |
| 3366 |
err = -errno; |
| 3367 |
free_fid(s, vs->xattr_fidp->fid); |
| 3368 |
goto out;
|
| 3369 |
} |
| 3370 |
/*
|
| 3371 |
* Read the xattr value
|
| 3372 |
*/
|
| 3373 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
| 3374 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
| 3375 |
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
| 3376 |
if (vs->size) {
|
| 3377 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
| 3378 |
err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, |
| 3379 |
&vs->name, vs->xattr_fidp->fs.xattr.value, |
| 3380 |
vs->xattr_fidp->fs.xattr.len); |
| 3381 |
} |
| 3382 |
v9fs_post_xattr_getvalue(s, vs, err); |
| 3383 |
return;
|
| 3384 |
out:
|
| 3385 |
complete_pdu(s, vs->pdu, err); |
| 3386 |
v9fs_string_free(&vs->name); |
| 3387 |
qemu_free(vs); |
| 3388 |
} |
| 3389 |
|
| 3390 |
static void v9fs_post_lxattr_getvalue(V9fsState *s, |
| 3391 |
V9fsXattrState *vs, int err)
|
| 3392 |
{
|
| 3393 |
if (err < 0) { |
| 3394 |
err = -errno; |
| 3395 |
free_fid(s, vs->xattr_fidp->fid); |
| 3396 |
goto out;
|
| 3397 |
} |
| 3398 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
| 3399 |
err = vs->offset; |
| 3400 |
out:
|
| 3401 |
complete_pdu(s, vs->pdu, err); |
| 3402 |
v9fs_string_free(&vs->name); |
| 3403 |
qemu_free(vs); |
| 3404 |
return;
|
| 3405 |
} |
| 3406 |
|
| 3407 |
static void v9fs_post_lxattr_check(V9fsState *s, |
| 3408 |
V9fsXattrState *vs, ssize_t err) |
| 3409 |
{
|
| 3410 |
if (err < 0) { |
| 3411 |
err = -errno; |
| 3412 |
free_fid(s, vs->xattr_fidp->fid); |
| 3413 |
goto out;
|
| 3414 |
} |
| 3415 |
/*
|
| 3416 |
* Read the xattr value
|
| 3417 |
*/
|
| 3418 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
| 3419 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
| 3420 |
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
| 3421 |
if (vs->size) {
|
| 3422 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
| 3423 |
err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, |
| 3424 |
vs->xattr_fidp->fs.xattr.value, |
| 3425 |
vs->xattr_fidp->fs.xattr.len); |
| 3426 |
} |
| 3427 |
v9fs_post_lxattr_getvalue(s, vs, err); |
| 3428 |
return;
|
| 3429 |
out:
|
| 3430 |
complete_pdu(s, vs->pdu, err); |
| 3431 |
v9fs_string_free(&vs->name); |
| 3432 |
qemu_free(vs); |
| 3433 |
} |
| 3434 |
|
| 3435 |
static void v9fs_xattrwalk(V9fsState *s, V9fsPDU *pdu) |
| 3436 |
{
|
| 3437 |
ssize_t err = 0;
|
| 3438 |
V9fsXattrState *vs; |
| 3439 |
int32_t fid, newfid; |
| 3440 |
|
| 3441 |
vs = qemu_malloc(sizeof(*vs));
|
| 3442 |
vs->pdu = pdu; |
| 3443 |
vs->offset = 7;
|
| 3444 |
|
| 3445 |
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name);
|
| 3446 |
vs->file_fidp = lookup_fid(s, fid); |
| 3447 |
if (vs->file_fidp == NULL) { |
| 3448 |
err = -ENOENT; |
| 3449 |
goto out;
|
| 3450 |
} |
| 3451 |
|
| 3452 |
vs->xattr_fidp = alloc_fid(s, newfid); |
| 3453 |
if (vs->xattr_fidp == NULL) { |
| 3454 |
err = -EINVAL; |
| 3455 |
goto out;
|
| 3456 |
} |
| 3457 |
|
| 3458 |
v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path); |
| 3459 |
if (vs->name.data[0] == 0) { |
| 3460 |
/*
|
| 3461 |
* listxattr request. Get the size first
|
| 3462 |
*/
|
| 3463 |
vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, |
| 3464 |
NULL, 0); |
| 3465 |
if (vs->size < 0) { |
| 3466 |
err = vs->size; |
| 3467 |
} |
| 3468 |
v9fs_post_lxattr_check(s, vs, err); |
| 3469 |
return;
|
| 3470 |
} else {
|
| 3471 |
/*
|
| 3472 |
* specific xattr fid. We check for xattr
|
| 3473 |
* presence also collect the xattr size
|
| 3474 |
*/
|
| 3475 |
vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, |
| 3476 |
&vs->name, NULL, 0); |
| 3477 |
if (vs->size < 0) { |
| 3478 |
err = vs->size; |
| 3479 |
} |
| 3480 |
v9fs_post_xattr_check(s, vs, err); |
| 3481 |
return;
|
| 3482 |
} |
| 3483 |
out:
|
| 3484 |
complete_pdu(s, vs->pdu, err); |
| 3485 |
v9fs_string_free(&vs->name); |
| 3486 |
qemu_free(vs); |
| 3487 |
} |
| 3488 |
|
| 3489 |
static void v9fs_xattrcreate(V9fsState *s, V9fsPDU *pdu) |
| 3490 |
{
|
| 3491 |
int flags;
|
| 3492 |
int32_t fid; |
| 3493 |
ssize_t err = 0;
|
| 3494 |
V9fsXattrState *vs; |
| 3495 |
|
| 3496 |
vs = qemu_malloc(sizeof(*vs));
|
| 3497 |
vs->pdu = pdu; |
| 3498 |
vs->offset = 7;
|
| 3499 |
|
| 3500 |
pdu_unmarshal(vs->pdu, vs->offset, "dsqd",
|
| 3501 |
&fid, &vs->name, &vs->size, &flags); |
| 3502 |
|
| 3503 |
vs->file_fidp = lookup_fid(s, fid); |
| 3504 |
if (vs->file_fidp == NULL) { |
| 3505 |
err = -EINVAL; |
| 3506 |
goto out;
|
| 3507 |
} |
| 3508 |
|
| 3509 |
/* Make the file fid point to xattr */
|
| 3510 |
vs->xattr_fidp = vs->file_fidp; |
| 3511 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
| 3512 |
vs->xattr_fidp->fs.xattr.copied_len = 0;
|
| 3513 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
| 3514 |
vs->xattr_fidp->fs.xattr.flags = flags; |
| 3515 |
v9fs_string_init(&vs->xattr_fidp->fs.xattr.name); |
| 3516 |
v9fs_string_copy(&vs->xattr_fidp->fs.xattr.name, &vs->name); |
| 3517 |
if (vs->size)
|
| 3518 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
| 3519 |
else
|
| 3520 |
vs->xattr_fidp->fs.xattr.value = NULL;
|
| 3521 |
|
| 3522 |
out:
|
| 3523 |
complete_pdu(s, vs->pdu, err); |
| 3524 |
v9fs_string_free(&vs->name); |
| 3525 |
qemu_free(vs); |
| 3526 |
} |
| 3527 |
|
| 3528 |
static void v9fs_readlink_post_readlink(V9fsState *s, V9fsReadLinkState *vs, |
| 3529 |
int err)
|
| 3530 |
{
|
| 3531 |
if (err < 0) { |
| 3532 |
err = -errno; |
| 3533 |
goto out;
|
| 3534 |
} |
| 3535 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "s", &vs->target);
|
| 3536 |
err = vs->offset; |
| 3537 |
out:
|
| 3538 |
complete_pdu(s, vs->pdu, err); |
| 3539 |
v9fs_string_free(&vs->target); |
| 3540 |
qemu_free(vs); |
| 3541 |
} |
| 3542 |
|
| 3543 |
static void v9fs_readlink(V9fsState *s, V9fsPDU *pdu) |
| 3544 |
{
|
| 3545 |
int32_t fid; |
| 3546 |
V9fsReadLinkState *vs; |
| 3547 |
int err = 0; |
| 3548 |
V9fsFidState *fidp; |
| 3549 |
|
| 3550 |
vs = qemu_malloc(sizeof(*vs));
|
| 3551 |
vs->pdu = pdu; |
| 3552 |
vs->offset = 7;
|
| 3553 |
|
| 3554 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
| 3555 |
|
| 3556 |
fidp = lookup_fid(s, fid); |
| 3557 |
if (fidp == NULL) { |
| 3558 |
err = -ENOENT; |
| 3559 |
goto out;
|
| 3560 |
} |
| 3561 |
|
| 3562 |
v9fs_string_init(&vs->target); |
| 3563 |
err = v9fs_do_readlink(s, &fidp->path, &vs->target); |
| 3564 |
v9fs_readlink_post_readlink(s, vs, err); |
| 3565 |
return;
|
| 3566 |
out:
|
| 3567 |
complete_pdu(s, vs->pdu, err); |
| 3568 |
qemu_free(vs); |
| 3569 |
} |
| 3570 |
|
| 3571 |
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
| 3572 |
|
| 3573 |
static pdu_handler_t *pdu_handlers[] = {
|
| 3574 |
[P9_TREADDIR] = v9fs_readdir, |
| 3575 |
[P9_TSTATFS] = v9fs_statfs, |
| 3576 |
[P9_TGETATTR] = v9fs_getattr, |
| 3577 |
[P9_TSETATTR] = v9fs_setattr, |
| 3578 |
[P9_TXATTRWALK] = v9fs_xattrwalk, |
| 3579 |
[P9_TXATTRCREATE] = v9fs_xattrcreate, |
| 3580 |
[P9_TMKNOD] = v9fs_mknod, |
| 3581 |
[P9_TRENAME] = v9fs_rename, |
| 3582 |
[P9_TLOCK] = v9fs_lock, |
| 3583 |
[P9_TGETLOCK] = v9fs_getlock, |
| 3584 |
[P9_TREADLINK] = v9fs_readlink, |
| 3585 |
[P9_TMKDIR] = v9fs_mkdir, |
| 3586 |
[P9_TVERSION] = v9fs_version, |
| 3587 |
[P9_TLOPEN] = v9fs_open, |
| 3588 |
[P9_TATTACH] = v9fs_attach, |
| 3589 |
[P9_TSTAT] = v9fs_stat, |
| 3590 |
[P9_TWALK] = v9fs_walk, |
| 3591 |
[P9_TCLUNK] = v9fs_clunk, |
| 3592 |
[P9_TFSYNC] = v9fs_fsync, |
| 3593 |
[P9_TOPEN] = v9fs_open, |
| 3594 |
[P9_TREAD] = v9fs_read, |
| 3595 |
#if 0
|
| 3596 |
[P9_TAUTH] = v9fs_auth,
|
| 3597 |
#endif
|
| 3598 |
[P9_TFLUSH] = v9fs_flush, |
| 3599 |
[P9_TLINK] = v9fs_link, |
| 3600 |
[P9_TSYMLINK] = v9fs_symlink, |
| 3601 |
[P9_TCREATE] = v9fs_create, |
| 3602 |
[P9_TLCREATE] = v9fs_lcreate, |
| 3603 |
[P9_TWRITE] = v9fs_write, |
| 3604 |
[P9_TWSTAT] = v9fs_wstat, |
| 3605 |
[P9_TREMOVE] = v9fs_remove, |
| 3606 |
}; |
| 3607 |
|
| 3608 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
| 3609 |
{
|
| 3610 |
pdu_handler_t *handler; |
| 3611 |
|
| 3612 |
if (debug_9p_pdu) {
|
| 3613 |
pprint_pdu(pdu); |
| 3614 |
} |
| 3615 |
|
| 3616 |
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); |
| 3617 |
|
| 3618 |
handler = pdu_handlers[pdu->id]; |
| 3619 |
BUG_ON(handler == NULL);
|
| 3620 |
|
| 3621 |
handler(s, pdu); |
| 3622 |
} |
| 3623 |
|
| 3624 |
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
| 3625 |
{
|
| 3626 |
V9fsState *s = (V9fsState *)vdev; |
| 3627 |
V9fsPDU *pdu; |
| 3628 |
ssize_t len; |
| 3629 |
|
| 3630 |
while ((pdu = alloc_pdu(s)) &&
|
| 3631 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
| 3632 |
uint8_t *ptr; |
| 3633 |
|
| 3634 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
| 3635 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
| 3636 |
|
| 3637 |
ptr = pdu->elem.out_sg[0].iov_base;
|
| 3638 |
|
| 3639 |
memcpy(&pdu->size, ptr, 4);
|
| 3640 |
pdu->id = ptr[4];
|
| 3641 |
memcpy(&pdu->tag, ptr + 5, 2); |
| 3642 |
|
| 3643 |
submit_pdu(s, pdu); |
| 3644 |
} |
| 3645 |
|
| 3646 |
free_pdu(s, pdu); |
| 3647 |
} |
| 3648 |
|
| 3649 |
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
| 3650 |
{
|
| 3651 |
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
| 3652 |
return features;
|
| 3653 |
} |
| 3654 |
|
| 3655 |
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
| 3656 |
{
|
| 3657 |
return (V9fsState *)vdev;
|
| 3658 |
} |
| 3659 |
|
| 3660 |
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) |
| 3661 |
{
|
| 3662 |
struct virtio_9p_config *cfg;
|
| 3663 |
V9fsState *s = to_virtio_9p(vdev); |
| 3664 |
|
| 3665 |
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + |
| 3666 |
s->tag_len); |
| 3667 |
stw_raw(&cfg->tag_len, s->tag_len); |
| 3668 |
memcpy(cfg->tag, s->tag, s->tag_len); |
| 3669 |
memcpy(config, cfg, s->config_size); |
| 3670 |
qemu_free(cfg); |
| 3671 |
} |
| 3672 |
|
| 3673 |
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) |
| 3674 |
{
|
| 3675 |
V9fsState *s; |
| 3676 |
int i, len;
|
| 3677 |
struct stat stat;
|
| 3678 |
FsTypeEntry *fse; |
| 3679 |
|
| 3680 |
|
| 3681 |
s = (V9fsState *)virtio_common_init("virtio-9p",
|
| 3682 |
VIRTIO_ID_9P, |
| 3683 |
sizeof(struct virtio_9p_config)+ |
| 3684 |
MAX_TAG_LEN, |
| 3685 |
sizeof(V9fsState));
|
| 3686 |
|
| 3687 |
/* initialize pdu allocator */
|
| 3688 |
QLIST_INIT(&s->free_list); |
| 3689 |
for (i = 0; i < (MAX_REQ - 1); i++) { |
| 3690 |
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
| 3691 |
} |
| 3692 |
|
| 3693 |
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); |
| 3694 |
|
| 3695 |
fse = get_fsdev_fsentry(conf->fsdev_id); |
| 3696 |
|
| 3697 |
if (!fse) {
|
| 3698 |
/* We don't have a fsdev identified by fsdev_id */
|
| 3699 |
fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
|
| 3700 |
"id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL"); |
| 3701 |
exit(1);
|
| 3702 |
} |
| 3703 |
|
| 3704 |
if (!fse->path || !conf->tag) {
|
| 3705 |
/* we haven't specified a mount_tag or the path */
|
| 3706 |
fprintf(stderr, "fsdev with id %s needs path "
|
| 3707 |
"and Virtio-9p device needs mount_tag arguments\n",
|
| 3708 |
conf->fsdev_id); |
| 3709 |
exit(1);
|
| 3710 |
} |
| 3711 |
|
| 3712 |
if (!strcmp(fse->security_model, "passthrough")) { |
| 3713 |
/* Files on the Fileserver set to client user credentials */
|
| 3714 |
s->ctx.fs_sm = SM_PASSTHROUGH; |
| 3715 |
s->ctx.xops = passthrough_xattr_ops; |
| 3716 |
} else if (!strcmp(fse->security_model, "mapped")) { |
| 3717 |
/* Files on the fileserver are set to QEMU credentials.
|
| 3718 |
* Client user credentials are saved in extended attributes.
|
| 3719 |
*/
|
| 3720 |
s->ctx.fs_sm = SM_MAPPED; |
| 3721 |
s->ctx.xops = mapped_xattr_ops; |
| 3722 |
} else if (!strcmp(fse->security_model, "none")) { |
| 3723 |
/*
|
| 3724 |
* Files on the fileserver are set to QEMU credentials.
|
| 3725 |
*/
|
| 3726 |
s->ctx.fs_sm = SM_NONE; |
| 3727 |
s->ctx.xops = none_xattr_ops; |
| 3728 |
} else {
|
| 3729 |
fprintf(stderr, "Default to security_model=none. You may want"
|
| 3730 |
" enable advanced security model using "
|
| 3731 |
"security option:\n\t security_model=passthrough \n\t "
|
| 3732 |
"security_model=mapped\n");
|
| 3733 |
s->ctx.fs_sm = SM_NONE; |
| 3734 |
s->ctx.xops = none_xattr_ops; |
| 3735 |
} |
| 3736 |
|
| 3737 |
if (lstat(fse->path, &stat)) {
|
| 3738 |
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
| 3739 |
exit(1);
|
| 3740 |
} else if (!S_ISDIR(stat.st_mode)) { |
| 3741 |
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
| 3742 |
exit(1);
|
| 3743 |
} |
| 3744 |
|
| 3745 |
s->ctx.fs_root = qemu_strdup(fse->path); |
| 3746 |
len = strlen(conf->tag); |
| 3747 |
if (len > MAX_TAG_LEN) {
|
| 3748 |
len = MAX_TAG_LEN; |
| 3749 |
} |
| 3750 |
/* s->tag is non-NULL terminated string */
|
| 3751 |
s->tag = qemu_malloc(len); |
| 3752 |
memcpy(s->tag, conf->tag, len); |
| 3753 |
s->tag_len = len; |
| 3754 |
s->ctx.uid = -1;
|
| 3755 |
|
| 3756 |
s->ops = fse->ops; |
| 3757 |
s->vdev.get_features = virtio_9p_get_features; |
| 3758 |
s->config_size = sizeof(struct virtio_9p_config) + |
| 3759 |
s->tag_len; |
| 3760 |
s->vdev.get_config = virtio_9p_get_config; |
| 3761 |
|
| 3762 |
return &s->vdev;
|
| 3763 |
} |