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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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static int omode_to_uflags(int8_t mode) |
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{ |
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int ret = 0; |
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|
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switch (mode & 3) { |
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case Oread:
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ret = O_RDONLY; |
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break;
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case Ordwr:
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ret = O_RDWR; |
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break;
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case Owrite:
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ret = O_WRONLY; |
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break;
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case Oexec:
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ret = O_RDONLY; |
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break;
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} |
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if (mode & Otrunc) {
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ret |= O_TRUNC; |
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} |
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if (mode & Oappend) {
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ret |= O_APPEND; |
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} |
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if (mode & Oexcl) {
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ret |= O_EXCL; |
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} |
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return ret;
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} |
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|
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void cred_init(FsCred *credp)
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{ |
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credp->fc_uid = -1;
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credp->fc_gid = -1;
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credp->fc_mode = -1;
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credp->fc_rdev = -1;
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} |
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static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
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{ |
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return s->ops->lstat(&s->ctx, path->data, stbuf);
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} |
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static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
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{ |
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ssize_t len; |
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buf->data = qemu_malloc(1024);
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len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1); |
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if (len > -1) { |
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buf->size = len; |
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buf->data[len] = 0;
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} |
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return len;
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} |
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static int v9fs_do_close(V9fsState *s, int fd) |
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{ |
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return s->ops->close(&s->ctx, fd);
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} |
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static int v9fs_do_closedir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->closedir(&s->ctx, dir);
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} |
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static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
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{ |
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return s->ops->open(&s->ctx, path->data, flags);
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} |
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static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path)
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{ |
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return s->ops->opendir(&s->ctx, path->data);
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} |
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static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->rewinddir(&s->ctx, dir);
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} |
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static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
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{ |
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return s->ops->telldir(&s->ctx, dir);
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} |
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static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->readdir(&s->ctx, dir);
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} |
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static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
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{ |
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return s->ops->seekdir(&s->ctx, dir, off);
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} |
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static int v9fs_do_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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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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} |
149 |
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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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} |
157 |
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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) |
160 |
{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = uid; |
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cred.fc_gid = gid; |
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cred.fc_mode = mode; |
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cred.fc_rdev = dev; |
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return s->ops->mknod(&s->ctx, name, &cred);
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} |
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static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode, |
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uid_t uid, gid_t gid) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = uid; |
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cred.fc_gid = gid; |
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cred.fc_mode = mode; |
179 |
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return s->ops->mkdir(&s->ctx, name, &cred);
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} |
182 |
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static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) |
184 |
{ |
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return s->ops->fstat(&s->ctx, fd, stbuf);
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} |
187 |
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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) |
190 |
{ |
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FsCred cred; |
192 |
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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; |
198 |
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return s->ops->open2(&s->ctx, fullname, flags, &cred);
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} |
201 |
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static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp, |
203 |
const char *oldpath, const char *newpath, gid_t gid) |
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{ |
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FsCred cred; |
206 |
cred_init(&cred); |
207 |
cred.fc_uid = fidp->uid; |
208 |
cred.fc_gid = gid; |
209 |
cred.fc_mode = 0777;
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210 |
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return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
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} |
213 |
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static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) |
215 |
{ |
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return s->ops->link(&s->ctx, oldpath->data, newpath->data);
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} |
218 |
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static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
220 |
{ |
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return s->ops->truncate(&s->ctx, path->data, size);
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} |
223 |
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224 |
static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, |
225 |
V9fsString *newpath) |
226 |
{ |
227 |
return s->ops->rename(&s->ctx, oldpath->data, newpath->data);
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} |
229 |
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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); |
234 |
cred.fc_uid = uid; |
235 |
cred.fc_gid = gid; |
236 |
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return s->ops->chown(&s->ctx, path->data, &cred);
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} |
239 |
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static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
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const struct timespec times[2]) |
242 |
{ |
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return s->ops->utimensat(&s->ctx, path->data, times);
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} |
245 |
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246 |
static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
247 |
{ |
248 |
return s->ops->remove(&s->ctx, path->data);
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} |
250 |
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static int v9fs_do_fsync(V9fsState *s, int fd) |
252 |
{ |
253 |
return s->ops->fsync(&s->ctx, fd);
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} |
255 |
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static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
257 |
{ |
258 |
return s->ops->statfs(&s->ctx, path->data, stbuf);
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} |
260 |
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261 |
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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264 |
{ |
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return s->ops->lgetxattr(&s->ctx, path->data,
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xattr_name->data, value, size); |
267 |
} |
268 |
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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); |
274 |
} |
275 |
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276 |
static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path, |
277 |
V9fsString *xattr_name, |
278 |
void *value, size_t size, int flags) |
279 |
{ |
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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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284 |
static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path, |
285 |
V9fsString *xattr_name) |
286 |
{ |
287 |
return s->ops->lremovexattr(&s->ctx, path->data,
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xattr_name->data); |
289 |
} |
290 |
|
291 |
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292 |
static void v9fs_string_init(V9fsString *str) |
293 |
{ |
294 |
str->data = NULL;
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295 |
str->size = 0;
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296 |
} |
297 |
|
298 |
static void v9fs_string_free(V9fsString *str) |
299 |
{ |
300 |
qemu_free(str->data); |
301 |
str->data = NULL;
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302 |
str->size = 0;
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303 |
} |
304 |
|
305 |
static void v9fs_string_null(V9fsString *str) |
306 |
{ |
307 |
v9fs_string_free(str); |
308 |
} |
309 |
|
310 |
static int number_to_string(void *arg, char type) |
311 |
{ |
312 |
unsigned int ret = 0; |
313 |
|
314 |
switch (type) {
|
315 |
case 'u': { |
316 |
unsigned int num = *(unsigned int *)arg; |
317 |
|
318 |
do {
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319 |
ret++; |
320 |
num = num/10;
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321 |
} while (num);
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322 |
break;
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323 |
} |
324 |
case 'U': { |
325 |
unsigned long num = *(unsigned long *)arg; |
326 |
do {
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327 |
ret++; |
328 |
num = num/10;
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329 |
} while (num);
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330 |
break;
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331 |
} |
332 |
default:
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333 |
printf("Number_to_string: Unknown number format\n");
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334 |
return -1; |
335 |
} |
336 |
|
337 |
return ret;
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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) {
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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 |
static size_t v9fs_string_size(V9fsString *str)
|
427 |
{ |
428 |
return str->size;
|
429 |
} |
430 |
|
431 |
static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
|
432 |
{ |
433 |
V9fsFidState *f; |
434 |
|
435 |
for (f = s->fid_list; f; f = f->next) {
|
436 |
if (f->fid == fid) {
|
437 |
return f;
|
438 |
} |
439 |
} |
440 |
|
441 |
return NULL; |
442 |
} |
443 |
|
444 |
static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
445 |
{ |
446 |
V9fsFidState *f; |
447 |
|
448 |
f = lookup_fid(s, fid); |
449 |
if (f) {
|
450 |
return NULL; |
451 |
} |
452 |
|
453 |
f = qemu_mallocz(sizeof(V9fsFidState));
|
454 |
|
455 |
f->fid = fid; |
456 |
f->fid_type = P9_FID_NONE; |
457 |
|
458 |
f->next = s->fid_list; |
459 |
s->fid_list = f; |
460 |
|
461 |
return f;
|
462 |
} |
463 |
|
464 |
static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
465 |
{ |
466 |
int retval = 0; |
467 |
|
468 |
if (fidp->fs.xattr.copied_len == -1) { |
469 |
/* getxattr/listxattr fid */
|
470 |
goto free_value;
|
471 |
} |
472 |
/*
|
473 |
* if this is fid for setxattr. clunk should
|
474 |
* result in setxattr localcall
|
475 |
*/
|
476 |
if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
|
477 |
/* clunk after partial write */
|
478 |
retval = -EINVAL; |
479 |
goto free_out;
|
480 |
} |
481 |
if (fidp->fs.xattr.len) {
|
482 |
retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, |
483 |
fidp->fs.xattr.value, |
484 |
fidp->fs.xattr.len, |
485 |
fidp->fs.xattr.flags); |
486 |
} else {
|
487 |
retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); |
488 |
} |
489 |
free_out:
|
490 |
v9fs_string_free(&fidp->fs.xattr.name); |
491 |
free_value:
|
492 |
if (fidp->fs.xattr.value) {
|
493 |
qemu_free(fidp->fs.xattr.value); |
494 |
} |
495 |
return retval;
|
496 |
} |
497 |
|
498 |
static int free_fid(V9fsState *s, int32_t fid) |
499 |
{ |
500 |
int retval = 0; |
501 |
V9fsFidState **fidpp, *fidp; |
502 |
|
503 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
504 |
if ((*fidpp)->fid == fid) {
|
505 |
break;
|
506 |
} |
507 |
} |
508 |
|
509 |
if (*fidpp == NULL) { |
510 |
return -ENOENT;
|
511 |
} |
512 |
|
513 |
fidp = *fidpp; |
514 |
*fidpp = fidp->next; |
515 |
|
516 |
if (fidp->fid_type == P9_FID_FILE) {
|
517 |
v9fs_do_close(s, fidp->fs.fd); |
518 |
} else if (fidp->fid_type == P9_FID_DIR) { |
519 |
v9fs_do_closedir(s, fidp->fs.dir); |
520 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
521 |
retval = v9fs_xattr_fid_clunk(s, fidp); |
522 |
} |
523 |
v9fs_string_free(&fidp->path); |
524 |
qemu_free(fidp); |
525 |
|
526 |
return retval;
|
527 |
} |
528 |
|
529 |
#define P9_QID_TYPE_DIR 0x80 |
530 |
#define P9_QID_TYPE_SYMLINK 0x02 |
531 |
|
532 |
#define P9_STAT_MODE_DIR 0x80000000 |
533 |
#define P9_STAT_MODE_APPEND 0x40000000 |
534 |
#define P9_STAT_MODE_EXCL 0x20000000 |
535 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
536 |
#define P9_STAT_MODE_AUTH 0x08000000 |
537 |
#define P9_STAT_MODE_TMP 0x04000000 |
538 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
539 |
#define P9_STAT_MODE_LINK 0x01000000 |
540 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
541 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
542 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
543 |
#define P9_STAT_MODE_SETUID 0x00080000 |
544 |
#define P9_STAT_MODE_SETGID 0x00040000 |
545 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
546 |
|
547 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
548 |
P9_STAT_MODE_SYMLINK | \ |
549 |
P9_STAT_MODE_LINK | \ |
550 |
P9_STAT_MODE_DEVICE | \ |
551 |
P9_STAT_MODE_NAMED_PIPE | \ |
552 |
P9_STAT_MODE_SOCKET) |
553 |
|
554 |
/* This is the algorithm from ufs in spfs */
|
555 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
556 |
{ |
557 |
size_t size; |
558 |
|
559 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
560 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
561 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
562 |
qidp->type = 0;
|
563 |
if (S_ISDIR(stbuf->st_mode)) {
|
564 |
qidp->type |= P9_QID_TYPE_DIR; |
565 |
} |
566 |
if (S_ISLNK(stbuf->st_mode)) {
|
567 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
568 |
} |
569 |
} |
570 |
|
571 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
572 |
{ |
573 |
struct stat stbuf;
|
574 |
int err;
|
575 |
|
576 |
err = v9fs_do_lstat(s, &fidp->path, &stbuf); |
577 |
if (err) {
|
578 |
return err;
|
579 |
} |
580 |
|
581 |
stat_to_qid(&stbuf, qidp); |
582 |
return 0; |
583 |
} |
584 |
|
585 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
586 |
{ |
587 |
V9fsPDU *pdu = NULL;
|
588 |
|
589 |
if (!QLIST_EMPTY(&s->free_list)) {
|
590 |
pdu = QLIST_FIRST(&s->free_list); |
591 |
QLIST_REMOVE(pdu, next); |
592 |
} |
593 |
return pdu;
|
594 |
} |
595 |
|
596 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
597 |
{ |
598 |
if (pdu) {
|
599 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
600 |
} |
601 |
} |
602 |
|
603 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
604 |
size_t offset, size_t size, int pack)
|
605 |
{ |
606 |
int i = 0; |
607 |
size_t copied = 0;
|
608 |
|
609 |
for (i = 0; size && i < sg_count; i++) { |
610 |
size_t len; |
611 |
if (offset >= sg[i].iov_len) {
|
612 |
/* skip this sg */
|
613 |
offset -= sg[i].iov_len; |
614 |
continue;
|
615 |
} else {
|
616 |
len = MIN(sg[i].iov_len - offset, size); |
617 |
if (pack) {
|
618 |
memcpy(sg[i].iov_base + offset, addr, len); |
619 |
} else {
|
620 |
memcpy(addr, sg[i].iov_base + offset, len); |
621 |
} |
622 |
size -= len; |
623 |
copied += len; |
624 |
addr += len; |
625 |
if (size) {
|
626 |
offset = 0;
|
627 |
continue;
|
628 |
} |
629 |
} |
630 |
} |
631 |
|
632 |
return copied;
|
633 |
} |
634 |
|
635 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
636 |
{ |
637 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
638 |
offset, size, 0);
|
639 |
} |
640 |
|
641 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
642 |
size_t size) |
643 |
{ |
644 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
645 |
offset, size, 1);
|
646 |
} |
647 |
|
648 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
649 |
{ |
650 |
size_t pos = 0;
|
651 |
int i, j;
|
652 |
struct iovec *src_sg;
|
653 |
unsigned int num; |
654 |
|
655 |
if (rx) {
|
656 |
src_sg = pdu->elem.in_sg; |
657 |
num = pdu->elem.in_num; |
658 |
} else {
|
659 |
src_sg = pdu->elem.out_sg; |
660 |
num = pdu->elem.out_num; |
661 |
} |
662 |
|
663 |
j = 0;
|
664 |
for (i = 0; i < num; i++) { |
665 |
if (offset <= pos) {
|
666 |
sg[j].iov_base = src_sg[i].iov_base; |
667 |
sg[j].iov_len = src_sg[i].iov_len; |
668 |
j++; |
669 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
670 |
sg[j].iov_base = src_sg[i].iov_base; |
671 |
sg[j].iov_len = src_sg[i].iov_len; |
672 |
sg[j].iov_base += (offset - pos); |
673 |
sg[j].iov_len -= (offset - pos); |
674 |
j++; |
675 |
} |
676 |
pos += src_sg[i].iov_len; |
677 |
} |
678 |
|
679 |
return j;
|
680 |
} |
681 |
|
682 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
683 |
{ |
684 |
size_t old_offset = offset; |
685 |
va_list ap; |
686 |
int i;
|
687 |
|
688 |
va_start(ap, fmt); |
689 |
for (i = 0; fmt[i]; i++) { |
690 |
switch (fmt[i]) {
|
691 |
case 'b': { |
692 |
uint8_t *valp = va_arg(ap, uint8_t *); |
693 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
694 |
break;
|
695 |
} |
696 |
case 'w': { |
697 |
uint16_t val, *valp; |
698 |
valp = va_arg(ap, uint16_t *); |
699 |
val = le16_to_cpupu(valp); |
700 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
701 |
*valp = val; |
702 |
break;
|
703 |
} |
704 |
case 'd': { |
705 |
uint32_t val, *valp; |
706 |
valp = va_arg(ap, uint32_t *); |
707 |
val = le32_to_cpupu(valp); |
708 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
709 |
*valp = val; |
710 |
break;
|
711 |
} |
712 |
case 'q': { |
713 |
uint64_t val, *valp; |
714 |
valp = va_arg(ap, uint64_t *); |
715 |
val = le64_to_cpup(valp); |
716 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
717 |
*valp = val; |
718 |
break;
|
719 |
} |
720 |
case 'v': { |
721 |
struct iovec *iov = va_arg(ap, struct iovec *); |
722 |
int *iovcnt = va_arg(ap, int *); |
723 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
724 |
break;
|
725 |
} |
726 |
case 's': { |
727 |
V9fsString *str = va_arg(ap, V9fsString *); |
728 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
729 |
/* FIXME: sanity check str->size */
|
730 |
str->data = qemu_malloc(str->size + 1);
|
731 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
732 |
str->data[str->size] = 0;
|
733 |
break;
|
734 |
} |
735 |
case 'Q': { |
736 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
737 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
738 |
&qidp->type, &qidp->version, &qidp->path); |
739 |
break;
|
740 |
} |
741 |
case 'S': { |
742 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
743 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
744 |
&statp->size, &statp->type, &statp->dev, |
745 |
&statp->qid, &statp->mode, &statp->atime, |
746 |
&statp->mtime, &statp->length, |
747 |
&statp->name, &statp->uid, &statp->gid, |
748 |
&statp->muid, &statp->extension, |
749 |
&statp->n_uid, &statp->n_gid, |
750 |
&statp->n_muid); |
751 |
break;
|
752 |
} |
753 |
case 'I': { |
754 |
V9fsIattr *iattr = va_arg(ap, V9fsIattr *); |
755 |
offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
|
756 |
&iattr->valid, &iattr->mode, |
757 |
&iattr->uid, &iattr->gid, &iattr->size, |
758 |
&iattr->atime_sec, &iattr->atime_nsec, |
759 |
&iattr->mtime_sec, &iattr->mtime_nsec); |
760 |
break;
|
761 |
} |
762 |
default:
|
763 |
break;
|
764 |
} |
765 |
} |
766 |
|
767 |
va_end(ap); |
768 |
|
769 |
return offset - old_offset;
|
770 |
} |
771 |
|
772 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
773 |
{ |
774 |
size_t old_offset = offset; |
775 |
va_list ap; |
776 |
int i;
|
777 |
|
778 |
va_start(ap, fmt); |
779 |
for (i = 0; fmt[i]; i++) { |
780 |
switch (fmt[i]) {
|
781 |
case 'b': { |
782 |
uint8_t val = va_arg(ap, int);
|
783 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
784 |
break;
|
785 |
} |
786 |
case 'w': { |
787 |
uint16_t val; |
788 |
cpu_to_le16w(&val, va_arg(ap, int));
|
789 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
790 |
break;
|
791 |
} |
792 |
case 'd': { |
793 |
uint32_t val; |
794 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
795 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
796 |
break;
|
797 |
} |
798 |
case 'q': { |
799 |
uint64_t val; |
800 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
801 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
802 |
break;
|
803 |
} |
804 |
case 'v': { |
805 |
struct iovec *iov = va_arg(ap, struct iovec *); |
806 |
int *iovcnt = va_arg(ap, int *); |
807 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
808 |
break;
|
809 |
} |
810 |
case 's': { |
811 |
V9fsString *str = va_arg(ap, V9fsString *); |
812 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
813 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
814 |
break;
|
815 |
} |
816 |
case 'Q': { |
817 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
818 |
offset += pdu_marshal(pdu, offset, "bdq",
|
819 |
qidp->type, qidp->version, qidp->path); |
820 |
break;
|
821 |
} |
822 |
case 'S': { |
823 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
824 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
825 |
statp->size, statp->type, statp->dev, |
826 |
&statp->qid, statp->mode, statp->atime, |
827 |
statp->mtime, statp->length, &statp->name, |
828 |
&statp->uid, &statp->gid, &statp->muid, |
829 |
&statp->extension, statp->n_uid, |
830 |
statp->n_gid, statp->n_muid); |
831 |
break;
|
832 |
} |
833 |
case 'A': { |
834 |
V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); |
835 |
offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
|
836 |
statp->st_result_mask, |
837 |
&statp->qid, statp->st_mode, |
838 |
statp->st_uid, statp->st_gid, |
839 |
statp->st_nlink, statp->st_rdev, |
840 |
statp->st_size, statp->st_blksize, statp->st_blocks, |
841 |
statp->st_atime_sec, statp->st_atime_nsec, |
842 |
statp->st_mtime_sec, statp->st_mtime_nsec, |
843 |
statp->st_ctime_sec, statp->st_ctime_nsec, |
844 |
statp->st_btime_sec, statp->st_btime_nsec, |
845 |
statp->st_gen, statp->st_data_version); |
846 |
break;
|
847 |
} |
848 |
default:
|
849 |
break;
|
850 |
} |
851 |
} |
852 |
va_end(ap); |
853 |
|
854 |
return offset - old_offset;
|
855 |
} |
856 |
|
857 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
858 |
{ |
859 |
int8_t id = pdu->id + 1; /* Response */ |
860 |
|
861 |
if (len < 0) { |
862 |
int err = -len;
|
863 |
len = 7;
|
864 |
|
865 |
if (s->proto_version != V9FS_PROTO_2000L) {
|
866 |
V9fsString str; |
867 |
|
868 |
str.data = strerror(err); |
869 |
str.size = strlen(str.data); |
870 |
|
871 |
len += pdu_marshal(pdu, len, "s", &str);
|
872 |
id = P9_RERROR; |
873 |
} |
874 |
|
875 |
len += pdu_marshal(pdu, len, "d", err);
|
876 |
|
877 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
878 |
id = P9_RLERROR; |
879 |
} |
880 |
} |
881 |
|
882 |
/* fill out the header */
|
883 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
884 |
|
885 |
/* keep these in sync */
|
886 |
pdu->size = len; |
887 |
pdu->id = id; |
888 |
|
889 |
/* push onto queue and notify */
|
890 |
virtqueue_push(s->vq, &pdu->elem, len); |
891 |
|
892 |
/* FIXME: we should batch these completions */
|
893 |
virtio_notify(&s->vdev, s->vq); |
894 |
|
895 |
free_pdu(s, pdu); |
896 |
} |
897 |
|
898 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
899 |
{ |
900 |
mode_t ret; |
901 |
|
902 |
ret = mode & 0777;
|
903 |
if (mode & P9_STAT_MODE_DIR) {
|
904 |
ret |= S_IFDIR; |
905 |
} |
906 |
|
907 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
908 |
ret |= S_IFLNK; |
909 |
} |
910 |
if (mode & P9_STAT_MODE_SOCKET) {
|
911 |
ret |= S_IFSOCK; |
912 |
} |
913 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
914 |
ret |= S_IFIFO; |
915 |
} |
916 |
if (mode & P9_STAT_MODE_DEVICE) {
|
917 |
if (extension && extension->data[0] == 'c') { |
918 |
ret |= S_IFCHR; |
919 |
} else {
|
920 |
ret |= S_IFBLK; |
921 |
} |
922 |
} |
923 |
|
924 |
if (!(ret&~0777)) { |
925 |
ret |= S_IFREG; |
926 |
} |
927 |
|
928 |
if (mode & P9_STAT_MODE_SETUID) {
|
929 |
ret |= S_ISUID; |
930 |
} |
931 |
if (mode & P9_STAT_MODE_SETGID) {
|
932 |
ret |= S_ISGID; |
933 |
} |
934 |
if (mode & P9_STAT_MODE_SETVTX) {
|
935 |
ret |= S_ISVTX; |
936 |
} |
937 |
|
938 |
return ret;
|
939 |
} |
940 |
|
941 |
static int donttouch_stat(V9fsStat *stat) |
942 |
{ |
943 |
if (stat->type == -1 && |
944 |
stat->dev == -1 &&
|
945 |
stat->qid.type == -1 &&
|
946 |
stat->qid.version == -1 &&
|
947 |
stat->qid.path == -1 &&
|
948 |
stat->mode == -1 &&
|
949 |
stat->atime == -1 &&
|
950 |
stat->mtime == -1 &&
|
951 |
stat->length == -1 &&
|
952 |
!stat->name.size && |
953 |
!stat->uid.size && |
954 |
!stat->gid.size && |
955 |
!stat->muid.size && |
956 |
stat->n_uid == -1 &&
|
957 |
stat->n_gid == -1 &&
|
958 |
stat->n_muid == -1) {
|
959 |
return 1; |
960 |
} |
961 |
|
962 |
return 0; |
963 |
} |
964 |
|
965 |
static void v9fs_stat_free(V9fsStat *stat) |
966 |
{ |
967 |
v9fs_string_free(&stat->name); |
968 |
v9fs_string_free(&stat->uid); |
969 |
v9fs_string_free(&stat->gid); |
970 |
v9fs_string_free(&stat->muid); |
971 |
v9fs_string_free(&stat->extension); |
972 |
} |
973 |
|
974 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
975 |
{ |
976 |
uint32_t mode; |
977 |
|
978 |
mode = stbuf->st_mode & 0777;
|
979 |
if (S_ISDIR(stbuf->st_mode)) {
|
980 |
mode |= P9_STAT_MODE_DIR; |
981 |
} |
982 |
|
983 |
if (S_ISLNK(stbuf->st_mode)) {
|
984 |
mode |= P9_STAT_MODE_SYMLINK; |
985 |
} |
986 |
|
987 |
if (S_ISSOCK(stbuf->st_mode)) {
|
988 |
mode |= P9_STAT_MODE_SOCKET; |
989 |
} |
990 |
|
991 |
if (S_ISFIFO(stbuf->st_mode)) {
|
992 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
993 |
} |
994 |
|
995 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
996 |
mode |= P9_STAT_MODE_DEVICE; |
997 |
} |
998 |
|
999 |
if (stbuf->st_mode & S_ISUID) {
|
1000 |
mode |= P9_STAT_MODE_SETUID; |
1001 |
} |
1002 |
|
1003 |
if (stbuf->st_mode & S_ISGID) {
|
1004 |
mode |= P9_STAT_MODE_SETGID; |
1005 |
} |
1006 |
|
1007 |
if (stbuf->st_mode & S_ISVTX) {
|
1008 |
mode |= P9_STAT_MODE_SETVTX; |
1009 |
} |
1010 |
|
1011 |
return mode;
|
1012 |
} |
1013 |
|
1014 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
1015 |
const struct stat *stbuf, |
1016 |
V9fsStat *v9stat) |
1017 |
{ |
1018 |
int err;
|
1019 |
const char *str; |
1020 |
|
1021 |
memset(v9stat, 0, sizeof(*v9stat)); |
1022 |
|
1023 |
stat_to_qid(stbuf, &v9stat->qid); |
1024 |
v9stat->mode = stat_to_v9mode(stbuf); |
1025 |
v9stat->atime = stbuf->st_atime; |
1026 |
v9stat->mtime = stbuf->st_mtime; |
1027 |
v9stat->length = stbuf->st_size; |
1028 |
|
1029 |
v9fs_string_null(&v9stat->uid); |
1030 |
v9fs_string_null(&v9stat->gid); |
1031 |
v9fs_string_null(&v9stat->muid); |
1032 |
|
1033 |
v9stat->n_uid = stbuf->st_uid; |
1034 |
v9stat->n_gid = stbuf->st_gid; |
1035 |
v9stat->n_muid = 0;
|
1036 |
|
1037 |
v9fs_string_null(&v9stat->extension); |
1038 |
|
1039 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
1040 |
err = v9fs_do_readlink(s, name, &v9stat->extension); |
1041 |
if (err == -1) { |
1042 |
err = -errno; |
1043 |
return err;
|
1044 |
} |
1045 |
v9stat->extension.data[err] = 0;
|
1046 |
v9stat->extension.size = err; |
1047 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1048 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
1049 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
1050 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
1051 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
1052 |
v9fs_string_sprintf(&v9stat->extension, "%s %lu",
|
1053 |
"HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); |
1054 |
} |
1055 |
|
1056 |
str = strrchr(name->data, '/');
|
1057 |
if (str) {
|
1058 |
str += 1;
|
1059 |
} else {
|
1060 |
str = name->data; |
1061 |
} |
1062 |
|
1063 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
1064 |
|
1065 |
v9stat->size = 61 +
|
1066 |
v9fs_string_size(&v9stat->name) + |
1067 |
v9fs_string_size(&v9stat->uid) + |
1068 |
v9fs_string_size(&v9stat->gid) + |
1069 |
v9fs_string_size(&v9stat->muid) + |
1070 |
v9fs_string_size(&v9stat->extension); |
1071 |
return 0; |
1072 |
} |
1073 |
|
1074 |
#define P9_STATS_MODE 0x00000001ULL |
1075 |
#define P9_STATS_NLINK 0x00000002ULL |
1076 |
#define P9_STATS_UID 0x00000004ULL |
1077 |
#define P9_STATS_GID 0x00000008ULL |
1078 |
#define P9_STATS_RDEV 0x00000010ULL |
1079 |
#define P9_STATS_ATIME 0x00000020ULL |
1080 |
#define P9_STATS_MTIME 0x00000040ULL |
1081 |
#define P9_STATS_CTIME 0x00000080ULL |
1082 |
#define P9_STATS_INO 0x00000100ULL |
1083 |
#define P9_STATS_SIZE 0x00000200ULL |
1084 |
#define P9_STATS_BLOCKS 0x00000400ULL |
1085 |
|
1086 |
#define P9_STATS_BTIME 0x00000800ULL |
1087 |
#define P9_STATS_GEN 0x00001000ULL |
1088 |
#define P9_STATS_DATA_VERSION 0x00002000ULL |
1089 |
|
1090 |
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ |
1091 |
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ |
1092 |
|
1093 |
|
1094 |
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, |
1095 |
V9fsStatDotl *v9lstat) |
1096 |
{ |
1097 |
memset(v9lstat, 0, sizeof(*v9lstat)); |
1098 |
|
1099 |
v9lstat->st_mode = stbuf->st_mode; |
1100 |
v9lstat->st_nlink = stbuf->st_nlink; |
1101 |
v9lstat->st_uid = stbuf->st_uid; |
1102 |
v9lstat->st_gid = stbuf->st_gid; |
1103 |
v9lstat->st_rdev = stbuf->st_rdev; |
1104 |
v9lstat->st_size = stbuf->st_size; |
1105 |
v9lstat->st_blksize = stbuf->st_blksize; |
1106 |
v9lstat->st_blocks = stbuf->st_blocks; |
1107 |
v9lstat->st_atime_sec = stbuf->st_atime; |
1108 |
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; |
1109 |
v9lstat->st_mtime_sec = stbuf->st_mtime; |
1110 |
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; |
1111 |
v9lstat->st_ctime_sec = stbuf->st_ctime; |
1112 |
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; |
1113 |
/* Currently we only support BASIC fields in stat */
|
1114 |
v9lstat->st_result_mask = P9_STATS_BASIC; |
1115 |
|
1116 |
stat_to_qid(stbuf, &v9lstat->qid); |
1117 |
} |
1118 |
|
1119 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1120 |
{ |
1121 |
while (len && *iovcnt) {
|
1122 |
if (len < sg->iov_len) {
|
1123 |
sg->iov_len -= len; |
1124 |
sg->iov_base += len; |
1125 |
len = 0;
|
1126 |
} else {
|
1127 |
len -= sg->iov_len; |
1128 |
sg++; |
1129 |
*iovcnt -= 1;
|
1130 |
} |
1131 |
} |
1132 |
|
1133 |
return sg;
|
1134 |
} |
1135 |
|
1136 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
1137 |
{ |
1138 |
int i;
|
1139 |
int total = 0; |
1140 |
|
1141 |
for (i = 0; i < *cnt; i++) { |
1142 |
if ((total + sg[i].iov_len) > cap) {
|
1143 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
1144 |
i++; |
1145 |
break;
|
1146 |
} |
1147 |
total += sg[i].iov_len; |
1148 |
} |
1149 |
|
1150 |
*cnt = i; |
1151 |
|
1152 |
return sg;
|
1153 |
} |
1154 |
|
1155 |
static void print_sg(struct iovec *sg, int cnt) |
1156 |
{ |
1157 |
int i;
|
1158 |
|
1159 |
printf("sg[%d]: {", cnt);
|
1160 |
for (i = 0; i < cnt; i++) { |
1161 |
if (i) {
|
1162 |
printf(", ");
|
1163 |
} |
1164 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
1165 |
} |
1166 |
printf("}\n");
|
1167 |
} |
1168 |
|
1169 |
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1170 |
{ |
1171 |
V9fsString str; |
1172 |
v9fs_string_init(&str); |
1173 |
v9fs_string_copy(&str, dst); |
1174 |
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
1175 |
v9fs_string_free(&str); |
1176 |
} |
1177 |
|
1178 |
static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
1179 |
{ |
1180 |
V9fsString version; |
1181 |
size_t offset = 7;
|
1182 |
|
1183 |
pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
1184 |
|
1185 |
if (!strcmp(version.data, "9P2000.u")) { |
1186 |
s->proto_version = V9FS_PROTO_2000U; |
1187 |
} else if (!strcmp(version.data, "9P2000.L")) { |
1188 |
s->proto_version = V9FS_PROTO_2000L; |
1189 |
} else {
|
1190 |
v9fs_string_sprintf(&version, "unknown");
|
1191 |
} |
1192 |
|
1193 |
offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
1194 |
complete_pdu(s, pdu, offset); |
1195 |
|
1196 |
v9fs_string_free(&version); |
1197 |
} |
1198 |
|
1199 |
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) |
1200 |
{ |
1201 |
int32_t fid, afid, n_uname; |
1202 |
V9fsString uname, aname; |
1203 |
V9fsFidState *fidp; |
1204 |
V9fsQID qid; |
1205 |
size_t offset = 7;
|
1206 |
ssize_t err; |
1207 |
|
1208 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
1209 |
|
1210 |
fidp = alloc_fid(s, fid); |
1211 |
if (fidp == NULL) { |
1212 |
err = -EINVAL; |
1213 |
goto out;
|
1214 |
} |
1215 |
|
1216 |
fidp->uid = n_uname; |
1217 |
|
1218 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
1219 |
err = fid_to_qid(s, fidp, &qid); |
1220 |
if (err) {
|
1221 |
err = -EINVAL; |
1222 |
free_fid(s, fid); |
1223 |
goto out;
|
1224 |
} |
1225 |
|
1226 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
1227 |
|
1228 |
err = offset; |
1229 |
out:
|
1230 |
complete_pdu(s, pdu, err); |
1231 |
v9fs_string_free(&uname); |
1232 |
v9fs_string_free(&aname); |
1233 |
} |
1234 |
|
1235 |
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1236 |
{ |
1237 |
if (err == -1) { |
1238 |
err = -errno; |
1239 |
goto out;
|
1240 |
} |
1241 |
|
1242 |
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); |
1243 |
if (err) {
|
1244 |
goto out;
|
1245 |
} |
1246 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); |
1247 |
err = vs->offset; |
1248 |
|
1249 |
out:
|
1250 |
complete_pdu(s, vs->pdu, err); |
1251 |
v9fs_stat_free(&vs->v9stat); |
1252 |
qemu_free(vs); |
1253 |
} |
1254 |
|
1255 |
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1256 |
{ |
1257 |
int32_t fid; |
1258 |
V9fsStatState *vs; |
1259 |
ssize_t err = 0;
|
1260 |
|
1261 |
vs = qemu_malloc(sizeof(*vs));
|
1262 |
vs->pdu = pdu; |
1263 |
vs->offset = 7;
|
1264 |
|
1265 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1266 |
|
1267 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
1268 |
|
1269 |
vs->fidp = lookup_fid(s, fid); |
1270 |
if (vs->fidp == NULL) { |
1271 |
err = -ENOENT; |
1272 |
goto out;
|
1273 |
} |
1274 |
|
1275 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1276 |
v9fs_stat_post_lstat(s, vs, err); |
1277 |
return;
|
1278 |
|
1279 |
out:
|
1280 |
complete_pdu(s, vs->pdu, err); |
1281 |
v9fs_stat_free(&vs->v9stat); |
1282 |
qemu_free(vs); |
1283 |
} |
1284 |
|
1285 |
static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs, |
1286 |
int err)
|
1287 |
{ |
1288 |
if (err == -1) { |
1289 |
err = -errno; |
1290 |
goto out;
|
1291 |
} |
1292 |
|
1293 |
stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl); |
1294 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
|
1295 |
err = vs->offset; |
1296 |
|
1297 |
out:
|
1298 |
complete_pdu(s, vs->pdu, err); |
1299 |
qemu_free(vs); |
1300 |
} |
1301 |
|
1302 |
static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu) |
1303 |
{ |
1304 |
int32_t fid; |
1305 |
V9fsStatStateDotl *vs; |
1306 |
ssize_t err = 0;
|
1307 |
V9fsFidState *fidp; |
1308 |
uint64_t request_mask; |
1309 |
|
1310 |
vs = qemu_malloc(sizeof(*vs));
|
1311 |
vs->pdu = pdu; |
1312 |
vs->offset = 7;
|
1313 |
|
1314 |
memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl)); |
1315 |
|
1316 |
pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
|
1317 |
|
1318 |
fidp = lookup_fid(s, fid); |
1319 |
if (fidp == NULL) { |
1320 |
err = -ENOENT; |
1321 |
goto out;
|
1322 |
} |
1323 |
|
1324 |
/* Currently we only support BASIC fields in stat, so there is no
|
1325 |
* need to look at request_mask.
|
1326 |
*/
|
1327 |
err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf); |
1328 |
v9fs_getattr_post_lstat(s, vs, err); |
1329 |
return;
|
1330 |
|
1331 |
out:
|
1332 |
complete_pdu(s, vs->pdu, err); |
1333 |
qemu_free(vs); |
1334 |
} |
1335 |
|
1336 |
/* From Linux kernel code */
|
1337 |
#define ATTR_MODE (1 << 0) |
1338 |
#define ATTR_UID (1 << 1) |
1339 |
#define ATTR_GID (1 << 2) |
1340 |
#define ATTR_SIZE (1 << 3) |
1341 |
#define ATTR_ATIME (1 << 4) |
1342 |
#define ATTR_MTIME (1 << 5) |
1343 |
#define ATTR_CTIME (1 << 6) |
1344 |
#define ATTR_MASK 127 |
1345 |
#define ATTR_ATIME_SET (1 << 7) |
1346 |
#define ATTR_MTIME_SET (1 << 8) |
1347 |
|
1348 |
static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs, |
1349 |
int err)
|
1350 |
{ |
1351 |
if (err == -1) { |
1352 |
err = -errno; |
1353 |
goto out;
|
1354 |
} |
1355 |
err = vs->offset; |
1356 |
|
1357 |
out:
|
1358 |
complete_pdu(s, vs->pdu, err); |
1359 |
qemu_free(vs); |
1360 |
} |
1361 |
|
1362 |
static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err) |
1363 |
{ |
1364 |
if (err == -1) { |
1365 |
err = -errno; |
1366 |
goto out;
|
1367 |
} |
1368 |
|
1369 |
if (vs->v9iattr.valid & (ATTR_SIZE)) {
|
1370 |
err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size); |
1371 |
} |
1372 |
v9fs_setattr_post_truncate(s, vs, err); |
1373 |
return;
|
1374 |
|
1375 |
out:
|
1376 |
complete_pdu(s, vs->pdu, err); |
1377 |
qemu_free(vs); |
1378 |
} |
1379 |
|
1380 |
static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs, |
1381 |
int err)
|
1382 |
{ |
1383 |
if (err == -1) { |
1384 |
err = -errno; |
1385 |
goto out;
|
1386 |
} |
1387 |
|
1388 |
/* If the only valid entry in iattr is ctime we can call
|
1389 |
* chown(-1,-1) to update the ctime of the file
|
1390 |
*/
|
1391 |
if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
|
1392 |
((vs->v9iattr.valid & ATTR_CTIME) |
1393 |
&& !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { |
1394 |
if (!(vs->v9iattr.valid & ATTR_UID)) {
|
1395 |
vs->v9iattr.uid = -1;
|
1396 |
} |
1397 |
if (!(vs->v9iattr.valid & ATTR_GID)) {
|
1398 |
vs->v9iattr.gid = -1;
|
1399 |
} |
1400 |
err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid, |
1401 |
vs->v9iattr.gid); |
1402 |
} |
1403 |
v9fs_setattr_post_chown(s, vs, err); |
1404 |
return;
|
1405 |
|
1406 |
out:
|
1407 |
complete_pdu(s, vs->pdu, err); |
1408 |
qemu_free(vs); |
1409 |
} |
1410 |
|
1411 |
static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err) |
1412 |
{ |
1413 |
if (err == -1) { |
1414 |
err = -errno; |
1415 |
goto out;
|
1416 |
} |
1417 |
|
1418 |
if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
|
1419 |
struct timespec times[2]; |
1420 |
if (vs->v9iattr.valid & ATTR_ATIME) {
|
1421 |
if (vs->v9iattr.valid & ATTR_ATIME_SET) {
|
1422 |
times[0].tv_sec = vs->v9iattr.atime_sec;
|
1423 |
times[0].tv_nsec = vs->v9iattr.atime_nsec;
|
1424 |
} else {
|
1425 |
times[0].tv_nsec = UTIME_NOW;
|
1426 |
} |
1427 |
} else {
|
1428 |
times[0].tv_nsec = UTIME_OMIT;
|
1429 |
} |
1430 |
|
1431 |
if (vs->v9iattr.valid & ATTR_MTIME) {
|
1432 |
if (vs->v9iattr.valid & ATTR_MTIME_SET) {
|
1433 |
times[1].tv_sec = vs->v9iattr.mtime_sec;
|
1434 |
times[1].tv_nsec = vs->v9iattr.mtime_nsec;
|
1435 |
} else {
|
1436 |
times[1].tv_nsec = UTIME_NOW;
|
1437 |
} |
1438 |
} else {
|
1439 |
times[1].tv_nsec = UTIME_OMIT;
|
1440 |
} |
1441 |
err = v9fs_do_utimensat(s, &vs->fidp->path, times); |
1442 |
} |
1443 |
v9fs_setattr_post_utimensat(s, vs, err); |
1444 |
return;
|
1445 |
|
1446 |
out:
|
1447 |
complete_pdu(s, vs->pdu, err); |
1448 |
qemu_free(vs); |
1449 |
} |
1450 |
|
1451 |
static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu) |
1452 |
{ |
1453 |
int32_t fid; |
1454 |
V9fsSetattrState *vs; |
1455 |
int err = 0; |
1456 |
|
1457 |
vs = qemu_malloc(sizeof(*vs));
|
1458 |
vs->pdu = pdu; |
1459 |
vs->offset = 7;
|
1460 |
|
1461 |
pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr);
|
1462 |
|
1463 |
vs->fidp = lookup_fid(s, fid); |
1464 |
if (vs->fidp == NULL) { |
1465 |
err = -EINVAL; |
1466 |
goto out;
|
1467 |
} |
1468 |
|
1469 |
if (vs->v9iattr.valid & ATTR_MODE) {
|
1470 |
err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode); |
1471 |
} |
1472 |
|
1473 |
v9fs_setattr_post_chmod(s, vs, err); |
1474 |
return;
|
1475 |
|
1476 |
out:
|
1477 |
complete_pdu(s, vs->pdu, err); |
1478 |
qemu_free(vs); |
1479 |
} |
1480 |
|
1481 |
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1482 |
{ |
1483 |
complete_pdu(s, vs->pdu, err); |
1484 |
|
1485 |
if (vs->nwnames) {
|
1486 |
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1487 |
v9fs_string_free(&vs->wnames[vs->name_idx]); |
1488 |
} |
1489 |
|
1490 |
qemu_free(vs->wnames); |
1491 |
qemu_free(vs->qids); |
1492 |
} |
1493 |
} |
1494 |
|
1495 |
static void v9fs_walk_marshal(V9fsWalkState *vs) |
1496 |
{ |
1497 |
int i;
|
1498 |
vs->offset = 7;
|
1499 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
1500 |
|
1501 |
for (i = 0; i < vs->nwnames; i++) { |
1502 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
1503 |
} |
1504 |
} |
1505 |
|
1506 |
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1507 |
int err)
|
1508 |
{ |
1509 |
if (err == -1) { |
1510 |
free_fid(s, vs->newfidp->fid); |
1511 |
v9fs_string_free(&vs->path); |
1512 |
err = -ENOENT; |
1513 |
goto out;
|
1514 |
} |
1515 |
|
1516 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1517 |
|
1518 |
vs->name_idx++; |
1519 |
if (vs->name_idx < vs->nwnames) {
|
1520 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1521 |
vs->wnames[vs->name_idx].data); |
1522 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1523 |
|
1524 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1525 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1526 |
return;
|
1527 |
} |
1528 |
|
1529 |
v9fs_string_free(&vs->path); |
1530 |
v9fs_walk_marshal(vs); |
1531 |
err = vs->offset; |
1532 |
out:
|
1533 |
v9fs_walk_complete(s, vs, err); |
1534 |
} |
1535 |
|
1536 |
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1537 |
int err)
|
1538 |
{ |
1539 |
if (err == -1) { |
1540 |
v9fs_string_free(&vs->path); |
1541 |
err = -ENOENT; |
1542 |
goto out;
|
1543 |
} |
1544 |
|
1545 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1546 |
vs->name_idx++; |
1547 |
if (vs->name_idx < vs->nwnames) {
|
1548 |
|
1549 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1550 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1551 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1552 |
|
1553 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1554 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1555 |
return;
|
1556 |
} |
1557 |
|
1558 |
v9fs_string_free(&vs->path); |
1559 |
v9fs_walk_marshal(vs); |
1560 |
err = vs->offset; |
1561 |
out:
|
1562 |
v9fs_walk_complete(s, vs, err); |
1563 |
} |
1564 |
|
1565 |
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1566 |
{ |
1567 |
int32_t fid, newfid; |
1568 |
V9fsWalkState *vs; |
1569 |
int err = 0; |
1570 |
int i;
|
1571 |
|
1572 |
vs = qemu_malloc(sizeof(*vs));
|
1573 |
vs->pdu = pdu; |
1574 |
vs->wnames = NULL;
|
1575 |
vs->qids = NULL;
|
1576 |
vs->offset = 7;
|
1577 |
|
1578 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
1579 |
&newfid, &vs->nwnames); |
1580 |
|
1581 |
if (vs->nwnames) {
|
1582 |
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
1583 |
|
1584 |
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); |
1585 |
|
1586 |
for (i = 0; i < vs->nwnames; i++) { |
1587 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
1588 |
&vs->wnames[i]); |
1589 |
} |
1590 |
} |
1591 |
|
1592 |
vs->fidp = lookup_fid(s, fid); |
1593 |
if (vs->fidp == NULL) { |
1594 |
err = -ENOENT; |
1595 |
goto out;
|
1596 |
} |
1597 |
|
1598 |
/* FIXME: is this really valid? */
|
1599 |
if (fid == newfid) {
|
1600 |
|
1601 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
1602 |
v9fs_string_init(&vs->path); |
1603 |
vs->name_idx = 0;
|
1604 |
|
1605 |
if (vs->name_idx < vs->nwnames) {
|
1606 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1607 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1608 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1609 |
|
1610 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1611 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1612 |
return;
|
1613 |
} |
1614 |
} else {
|
1615 |
vs->newfidp = alloc_fid(s, newfid); |
1616 |
if (vs->newfidp == NULL) { |
1617 |
err = -EINVAL; |
1618 |
goto out;
|
1619 |
} |
1620 |
|
1621 |
vs->newfidp->uid = vs->fidp->uid; |
1622 |
v9fs_string_init(&vs->path); |
1623 |
vs->name_idx = 0;
|
1624 |
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); |
1625 |
|
1626 |
if (vs->name_idx < vs->nwnames) {
|
1627 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1628 |
vs->wnames[vs->name_idx].data); |
1629 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1630 |
|
1631 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1632 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1633 |
return;
|
1634 |
} |
1635 |
} |
1636 |
|
1637 |
v9fs_walk_marshal(vs); |
1638 |
err = vs->offset; |
1639 |
out:
|
1640 |
v9fs_walk_complete(s, vs, err); |
1641 |
} |
1642 |
|
1643 |
static int32_t get_iounit(V9fsState *s, V9fsString *name)
|
1644 |
{ |
1645 |
struct statfs stbuf;
|
1646 |
int32_t iounit = 0;
|
1647 |
|
1648 |
/*
|
1649 |
* iounit should be multiples of f_bsize (host filesystem block size
|
1650 |
* and as well as less than (client msize - P9_IOHDRSZ))
|
1651 |
*/
|
1652 |
if (!v9fs_do_statfs(s, name, &stbuf)) {
|
1653 |
iounit = stbuf.f_bsize; |
1654 |
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; |
1655 |
} |
1656 |
|
1657 |
if (!iounit) {
|
1658 |
iounit = s->msize - P9_IOHDRSZ; |
1659 |
} |
1660 |
return iounit;
|
1661 |
} |
1662 |
|
1663 |
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1664 |
{ |
1665 |
if (vs->fidp->fs.dir == NULL) { |
1666 |
err = -errno; |
1667 |
goto out;
|
1668 |
} |
1669 |
vs->fidp->fid_type = P9_FID_DIR; |
1670 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1671 |
err = vs->offset; |
1672 |
out:
|
1673 |
complete_pdu(s, vs->pdu, err); |
1674 |
qemu_free(vs); |
1675 |
|
1676 |
} |
1677 |
|
1678 |
static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1679 |
{ |
1680 |
int err;
|
1681 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
1682 |
err = vs->offset; |
1683 |
complete_pdu(s, vs->pdu, err); |
1684 |
qemu_free(vs); |
1685 |
} |
1686 |
|
1687 |
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1688 |
{ |
1689 |
if (vs->fidp->fs.fd == -1) { |
1690 |
err = -errno; |
1691 |
goto out;
|
1692 |
} |
1693 |
vs->fidp->fid_type = P9_FID_FILE; |
1694 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
1695 |
v9fs_open_post_getiounit(s, vs); |
1696 |
return;
|
1697 |
out:
|
1698 |
complete_pdu(s, vs->pdu, err); |
1699 |
qemu_free(vs); |
1700 |
} |
1701 |
|
1702 |
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) |
1703 |
{ |
1704 |
int flags;
|
1705 |
|
1706 |
if (err) {
|
1707 |
err = -errno; |
1708 |
goto out;
|
1709 |
} |
1710 |
|
1711 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1712 |
|
1713 |
if (S_ISDIR(vs->stbuf.st_mode)) {
|
1714 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path); |
1715 |
v9fs_open_post_opendir(s, vs, err); |
1716 |
} else {
|
1717 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1718 |
flags = vs->mode; |
1719 |
flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
1720 |
/* Ignore direct disk access hint until the server supports it. */
|
1721 |
flags &= ~O_DIRECT; |
1722 |
} else {
|
1723 |
flags = omode_to_uflags(vs->mode); |
1724 |
} |
1725 |
vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags); |
1726 |
v9fs_open_post_open(s, vs, err); |
1727 |
} |
1728 |
return;
|
1729 |
out:
|
1730 |
complete_pdu(s, vs->pdu, err); |
1731 |
qemu_free(vs); |
1732 |
} |
1733 |
|
1734 |
static void v9fs_open(V9fsState *s, V9fsPDU *pdu) |
1735 |
{ |
1736 |
int32_t fid; |
1737 |
V9fsOpenState *vs; |
1738 |
ssize_t err = 0;
|
1739 |
|
1740 |
vs = qemu_malloc(sizeof(*vs));
|
1741 |
vs->pdu = pdu; |
1742 |
vs->offset = 7;
|
1743 |
vs->mode = 0;
|
1744 |
|
1745 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1746 |
pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode);
|
1747 |
} else {
|
1748 |
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
1749 |
} |
1750 |
|
1751 |
vs->fidp = lookup_fid(s, fid); |
1752 |
if (vs->fidp == NULL) { |
1753 |
err = -ENOENT; |
1754 |
goto out;
|
1755 |
} |
1756 |
|
1757 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
1758 |
|
1759 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1760 |
|
1761 |
v9fs_open_post_lstat(s, vs, err); |
1762 |
return;
|
1763 |
out:
|
1764 |
complete_pdu(s, pdu, err); |
1765 |
qemu_free(vs); |
1766 |
} |
1767 |
|
1768 |
static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
1769 |
{ |
1770 |
if (err == 0) { |
1771 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
1772 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1773 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
|
1774 |
&vs->iounit); |
1775 |
err = vs->offset; |
1776 |
} else {
|
1777 |
vs->fidp->fid_type = P9_FID_NONE; |
1778 |
err = -errno; |
1779 |
if (vs->fidp->fs.fd > 0) { |
1780 |
close(vs->fidp->fs.fd); |
1781 |
} |
1782 |
} |
1783 |
|
1784 |
complete_pdu(s, vs->pdu, err); |
1785 |
v9fs_string_free(&vs->name); |
1786 |
v9fs_string_free(&vs->fullname); |
1787 |
qemu_free(vs); |
1788 |
} |
1789 |
|
1790 |
static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, |
1791 |
int err)
|
1792 |
{ |
1793 |
if (err) {
|
1794 |
err = -errno; |
1795 |
goto out;
|
1796 |
} |
1797 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
1798 |
|
1799 |
out:
|
1800 |
v9fs_post_lcreate(s, vs, err); |
1801 |
} |
1802 |
|
1803 |
static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, |
1804 |
int err)
|
1805 |
{ |
1806 |
if (vs->fidp->fs.fd == -1) { |
1807 |
err = -errno; |
1808 |
goto out;
|
1809 |
} |
1810 |
vs->fidp->fid_type = P9_FID_FILE; |
1811 |
vs->iounit = get_iounit(s, &vs->fullname); |
1812 |
v9fs_lcreate_post_get_iounit(s, vs, err); |
1813 |
return;
|
1814 |
|
1815 |
out:
|
1816 |
v9fs_post_lcreate(s, vs, err); |
1817 |
} |
1818 |
|
1819 |
static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu) |
1820 |
{ |
1821 |
int32_t dfid, flags, mode; |
1822 |
gid_t gid; |
1823 |
V9fsLcreateState *vs; |
1824 |
ssize_t err = 0;
|
1825 |
|
1826 |
vs = qemu_malloc(sizeof(*vs));
|
1827 |
vs->pdu = pdu; |
1828 |
vs->offset = 7;
|
1829 |
|
1830 |
v9fs_string_init(&vs->fullname); |
1831 |
|
1832 |
pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
|
1833 |
&mode, &gid); |
1834 |
|
1835 |
vs->fidp = lookup_fid(s, dfid); |
1836 |
if (vs->fidp == NULL) { |
1837 |
err = -ENOENT; |
1838 |
goto out;
|
1839 |
} |
1840 |
|
1841 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
1842 |
vs->name.data); |
1843 |
|
1844 |
/* Ignore direct disk access hint until the server supports it. */
|
1845 |
flags &= ~O_DIRECT; |
1846 |
|
1847 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
1848 |
gid, flags, mode); |
1849 |
v9fs_lcreate_post_do_open2(s, vs, err); |
1850 |
return;
|
1851 |
|
1852 |
out:
|
1853 |
complete_pdu(s, vs->pdu, err); |
1854 |
v9fs_string_free(&vs->name); |
1855 |
qemu_free(vs); |
1856 |
} |
1857 |
|
1858 |
static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err) |
1859 |
{ |
1860 |
if (err == -1) { |
1861 |
err = -errno; |
1862 |
} |
1863 |
complete_pdu(s, pdu, err); |
1864 |
} |
1865 |
|
1866 |
static void v9fs_fsync(V9fsState *s, V9fsPDU *pdu) |
1867 |
{ |
1868 |
int32_t fid; |
1869 |
size_t offset = 7;
|
1870 |
V9fsFidState *fidp; |
1871 |
int err;
|
1872 |
|
1873 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1874 |
fidp = lookup_fid(s, fid); |
1875 |
if (fidp == NULL) { |
1876 |
err = -ENOENT; |
1877 |
v9fs_post_do_fsync(s, pdu, err); |
1878 |
return;
|
1879 |
} |
1880 |
err = v9fs_do_fsync(s, fidp->fs.fd); |
1881 |
v9fs_post_do_fsync(s, pdu, err); |
1882 |
} |
1883 |
|
1884 |
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
1885 |
{ |
1886 |
int32_t fid; |
1887 |
size_t offset = 7;
|
1888 |
int err;
|
1889 |
|
1890 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1891 |
|
1892 |
err = free_fid(s, fid); |
1893 |
if (err < 0) { |
1894 |
goto out;
|
1895 |
} |
1896 |
|
1897 |
offset = 7;
|
1898 |
err = offset; |
1899 |
out:
|
1900 |
complete_pdu(s, pdu, err); |
1901 |
} |
1902 |
|
1903 |
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1904 |
|
1905 |
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1906 |
{ |
1907 |
if (err) {
|
1908 |
goto out;
|
1909 |
} |
1910 |
v9fs_stat_free(&vs->v9stat); |
1911 |
v9fs_string_free(&vs->name); |
1912 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1913 |
vs->offset += vs->count; |
1914 |
err = vs->offset; |
1915 |
out:
|
1916 |
complete_pdu(s, vs->pdu, err); |
1917 |
qemu_free(vs); |
1918 |
return;
|
1919 |
} |
1920 |
|
1921 |
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, |
1922 |
ssize_t err) |
1923 |
{ |
1924 |
if (err) {
|
1925 |
err = -errno; |
1926 |
goto out;
|
1927 |
} |
1928 |
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); |
1929 |
if (err) {
|
1930 |
goto out;
|
1931 |
} |
1932 |
|
1933 |
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", |
1934 |
&vs->v9stat); |
1935 |
if ((vs->len != (vs->v9stat.size + 2)) || |
1936 |
((vs->count + vs->len) > vs->max_count)) { |
1937 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
1938 |
v9fs_read_post_seekdir(s, vs, err); |
1939 |
return;
|
1940 |
} |
1941 |
vs->count += vs->len; |
1942 |
v9fs_stat_free(&vs->v9stat); |
1943 |
v9fs_string_free(&vs->name); |
1944 |
vs->dir_pos = vs->dent->d_off; |
1945 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
1946 |
v9fs_read_post_readdir(s, vs, err); |
1947 |
return;
|
1948 |
out:
|
1949 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
1950 |
v9fs_read_post_seekdir(s, vs, err); |
1951 |
return;
|
1952 |
|
1953 |
} |
1954 |
|
1955 |
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1956 |
{ |
1957 |
if (vs->dent) {
|
1958 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1959 |
v9fs_string_init(&vs->name); |
1960 |
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
1961 |
vs->dent->d_name); |
1962 |
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); |
1963 |
v9fs_read_post_dir_lstat(s, vs, err); |
1964 |
return;
|
1965 |
} |
1966 |
|
1967 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1968 |
vs->offset += vs->count; |
1969 |
err = vs->offset; |
1970 |
complete_pdu(s, vs->pdu, err); |
1971 |
qemu_free(vs); |
1972 |
return;
|
1973 |
} |
1974 |
|
1975 |
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1976 |
{ |
1977 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
1978 |
v9fs_read_post_readdir(s, vs, err); |
1979 |
return;
|
1980 |
} |
1981 |
|
1982 |
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, |
1983 |
ssize_t err) |
1984 |
{ |
1985 |
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
1986 |
v9fs_read_post_telldir(s, vs, err); |
1987 |
return;
|
1988 |
} |
1989 |
|
1990 |
static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1991 |
{ |
1992 |
if (err < 0) { |
1993 |
/* IO error return the error */
|
1994 |
err = -errno; |
1995 |
goto out;
|
1996 |
} |
1997 |
vs->total += vs->len; |
1998 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
1999 |
if (vs->total < vs->count && vs->len > 0) { |
2000 |
do {
|
2001 |
if (0) { |
2002 |
print_sg(vs->sg, vs->cnt); |
2003 |
} |
2004 |
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2005 |
vs->off); |
2006 |
if (vs->len > 0) { |
2007 |
vs->off += vs->len; |
2008 |
} |
2009 |
} while (vs->len == -1 && errno == EINTR); |
2010 |
if (vs->len == -1) { |
2011 |
err = -errno; |
2012 |
} |
2013 |
v9fs_read_post_preadv(s, vs, err); |
2014 |
return;
|
2015 |
} |
2016 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
2017 |
vs->offset += vs->count; |
2018 |
err = vs->offset; |
2019 |
|
2020 |
out:
|
2021 |
complete_pdu(s, vs->pdu, err); |
2022 |
qemu_free(vs); |
2023 |
} |
2024 |
|
2025 |
static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
2026 |
{ |
2027 |
ssize_t err = 0;
|
2028 |
int read_count;
|
2029 |
int64_t xattr_len; |
2030 |
|
2031 |
xattr_len = vs->fidp->fs.xattr.len; |
2032 |
read_count = xattr_len - vs->off; |
2033 |
if (read_count > vs->count) {
|
2034 |
read_count = vs->count; |
2035 |
} else if (read_count < 0) { |
2036 |
/*
|
2037 |
* read beyond XATTR value
|
2038 |
*/
|
2039 |
read_count = 0;
|
2040 |
} |
2041 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
|
2042 |
vs->offset += pdu_pack(vs->pdu, vs->offset, |
2043 |
((char *)vs->fidp->fs.xattr.value) + vs->off,
|
2044 |
read_count); |
2045 |
err = vs->offset; |
2046 |
complete_pdu(s, vs->pdu, err); |
2047 |
qemu_free(vs); |
2048 |
} |
2049 |
|
2050 |
static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
2051 |
{ |
2052 |
int32_t fid; |
2053 |
V9fsReadState *vs; |
2054 |
ssize_t err = 0;
|
2055 |
|
2056 |
vs = qemu_malloc(sizeof(*vs));
|
2057 |
vs->pdu = pdu; |
2058 |
vs->offset = 7;
|
2059 |
vs->total = 0;
|
2060 |
vs->len = 0;
|
2061 |
vs->count = 0;
|
2062 |
|
2063 |
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
2064 |
|
2065 |
vs->fidp = lookup_fid(s, fid); |
2066 |
if (vs->fidp == NULL) { |
2067 |
err = -EINVAL; |
2068 |
goto out;
|
2069 |
} |
2070 |
|
2071 |
if (vs->fidp->fid_type == P9_FID_DIR) {
|
2072 |
vs->max_count = vs->count; |
2073 |
vs->count = 0;
|
2074 |
if (vs->off == 0) { |
2075 |
v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
2076 |
} |
2077 |
v9fs_read_post_rewinddir(s, vs, err); |
2078 |
return;
|
2079 |
} else if (vs->fidp->fid_type == P9_FID_FILE) { |
2080 |
vs->sg = vs->iov; |
2081 |
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); |
2082 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2083 |
if (vs->total <= vs->count) {
|
2084 |
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2085 |
vs->off); |
2086 |
if (vs->len > 0) { |
2087 |
vs->off += vs->len; |
2088 |
} |
2089 |
err = vs->len; |
2090 |
v9fs_read_post_preadv(s, vs, err); |
2091 |
} |
2092 |
return;
|
2093 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2094 |
v9fs_xattr_read(s, vs); |
2095 |
return;
|
2096 |
} else {
|
2097 |
err = -EINVAL; |
2098 |
} |
2099 |
out:
|
2100 |
complete_pdu(s, pdu, err); |
2101 |
qemu_free(vs); |
2102 |
} |
2103 |
|
2104 |
typedef struct V9fsReadDirState { |
2105 |
V9fsPDU *pdu; |
2106 |
V9fsFidState *fidp; |
2107 |
V9fsQID qid; |
2108 |
off_t saved_dir_pos; |
2109 |
struct dirent *dent;
|
2110 |
int32_t count; |
2111 |
int32_t max_count; |
2112 |
size_t offset; |
2113 |
int64_t initial_offset; |
2114 |
V9fsString name; |
2115 |
} V9fsReadDirState; |
2116 |
|
2117 |
static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs) |
2118 |
{ |
2119 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
2120 |
vs->offset += vs->count; |
2121 |
complete_pdu(s, vs->pdu, vs->offset); |
2122 |
qemu_free(vs); |
2123 |
return;
|
2124 |
} |
2125 |
|
2126 |
/* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
2127 |
* size of type (1) + size of name.size (2) + strlen(name.data)
|
2128 |
*/
|
2129 |
#define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data)) |
2130 |
|
2131 |
static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs) |
2132 |
{ |
2133 |
int len;
|
2134 |
size_t size; |
2135 |
|
2136 |
if (vs->dent) {
|
2137 |
v9fs_string_init(&vs->name); |
2138 |
v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name);
|
2139 |
|
2140 |
if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
|
2141 |
/* Ran out of buffer. Set dir back to old position and return */
|
2142 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos); |
2143 |
v9fs_readdir_post_seekdir(s, vs); |
2144 |
return;
|
2145 |
} |
2146 |
|
2147 |
/* Fill up just the path field of qid because the client uses
|
2148 |
* only that. To fill the entire qid structure we will have
|
2149 |
* to stat each dirent found, which is expensive
|
2150 |
*/
|
2151 |
size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path)); |
2152 |
memcpy(&vs->qid.path, &vs->dent->d_ino, size); |
2153 |
/* Fill the other fields with dummy values */
|
2154 |
vs->qid.type = 0;
|
2155 |
vs->qid.version = 0;
|
2156 |
|
2157 |
len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs", |
2158 |
&vs->qid, vs->dent->d_off, |
2159 |
vs->dent->d_type, &vs->name); |
2160 |
vs->count += len; |
2161 |
v9fs_string_free(&vs->name); |
2162 |
vs->saved_dir_pos = vs->dent->d_off; |
2163 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
2164 |
v9fs_readdir_post_readdir(s, vs); |
2165 |
return;
|
2166 |
} |
2167 |
|
2168 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
2169 |
vs->offset += vs->count; |
2170 |
complete_pdu(s, vs->pdu, vs->offset); |
2171 |
qemu_free(vs); |
2172 |
return;
|
2173 |
} |
2174 |
|
2175 |
static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs) |
2176 |
{ |
2177 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
2178 |
v9fs_readdir_post_readdir(s, vs); |
2179 |
return;
|
2180 |
} |
2181 |
|
2182 |
static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs) |
2183 |
{ |
2184 |
vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
2185 |
v9fs_readdir_post_telldir(s, vs); |
2186 |
return;
|
2187 |
} |
2188 |
|
2189 |
static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu) |
2190 |
{ |
2191 |
int32_t fid; |
2192 |
V9fsReadDirState *vs; |
2193 |
ssize_t err = 0;
|
2194 |
size_t offset = 7;
|
2195 |
|
2196 |
vs = qemu_malloc(sizeof(*vs));
|
2197 |
vs->pdu = pdu; |
2198 |
vs->offset = 7;
|
2199 |
vs->count = 0;
|
2200 |
|
2201 |
pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset,
|
2202 |
&vs->max_count); |
2203 |
|
2204 |
vs->fidp = lookup_fid(s, fid); |
2205 |
if (vs->fidp == NULL || !(vs->fidp->fs.dir)) { |
2206 |
err = -EINVAL; |
2207 |
goto out;
|
2208 |
} |
2209 |
|
2210 |
if (vs->initial_offset == 0) { |
2211 |
v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
2212 |
} else {
|
2213 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset); |
2214 |
} |
2215 |
|
2216 |
v9fs_readdir_post_setdir(s, vs); |
2217 |
return;
|
2218 |
|
2219 |
out:
|
2220 |
complete_pdu(s, pdu, err); |
2221 |
qemu_free(vs); |
2222 |
return;
|
2223 |
} |
2224 |
|
2225 |
static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs, |
2226 |
ssize_t err) |
2227 |
{ |
2228 |
if (err < 0) { |
2229 |
/* IO error return the error */
|
2230 |
err = -errno; |
2231 |
goto out;
|
2232 |
} |
2233 |
vs->total += vs->len; |
2234 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
2235 |
if (vs->total < vs->count && vs->len > 0) { |
2236 |
do {
|
2237 |
if (0) { |
2238 |
print_sg(vs->sg, vs->cnt); |
2239 |
} |
2240 |
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2241 |
vs->off); |
2242 |
if (vs->len > 0) { |
2243 |
vs->off += vs->len; |
2244 |
} |
2245 |
} while (vs->len == -1 && errno == EINTR); |
2246 |
if (vs->len == -1) { |
2247 |
err = -errno; |
2248 |
} |
2249 |
v9fs_write_post_pwritev(s, vs, err); |
2250 |
return;
|
2251 |
} |
2252 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
2253 |
err = vs->offset; |
2254 |
out:
|
2255 |
complete_pdu(s, vs->pdu, err); |
2256 |
qemu_free(vs); |
2257 |
} |
2258 |
|
2259 |
static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
2260 |
{ |
2261 |
int i, to_copy;
|
2262 |
ssize_t err = 0;
|
2263 |
int write_count;
|
2264 |
int64_t xattr_len; |
2265 |
|
2266 |
xattr_len = vs->fidp->fs.xattr.len; |
2267 |
write_count = xattr_len - vs->off; |
2268 |
if (write_count > vs->count) {
|
2269 |
write_count = vs->count; |
2270 |
} else if (write_count < 0) { |
2271 |
/*
|
2272 |
* write beyond XATTR value len specified in
|
2273 |
* xattrcreate
|
2274 |
*/
|
2275 |
err = -ENOSPC; |
2276 |
goto out;
|
2277 |
} |
2278 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count);
|
2279 |
err = vs->offset; |
2280 |
vs->fidp->fs.xattr.copied_len += write_count; |
2281 |
/*
|
2282 |
* Now copy the content from sg list
|
2283 |
*/
|
2284 |
for (i = 0; i < vs->cnt; i++) { |
2285 |
if (write_count > vs->sg[i].iov_len) {
|
2286 |
to_copy = vs->sg[i].iov_len; |
2287 |
} else {
|
2288 |
to_copy = write_count; |
2289 |
} |
2290 |
memcpy((char *)vs->fidp->fs.xattr.value + vs->off,
|
2291 |
vs->sg[i].iov_base, to_copy); |
2292 |
/* updating vs->off since we are not using below */
|
2293 |
vs->off += to_copy; |
2294 |
write_count -= to_copy; |
2295 |
} |
2296 |
out:
|
2297 |
complete_pdu(s, vs->pdu, err); |
2298 |
qemu_free(vs); |
2299 |
} |
2300 |
|
2301 |
static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
2302 |
{ |
2303 |
int32_t fid; |
2304 |
V9fsWriteState *vs; |
2305 |
ssize_t err; |
2306 |
|
2307 |
vs = qemu_malloc(sizeof(*vs));
|
2308 |
|
2309 |
vs->pdu = pdu; |
2310 |
vs->offset = 7;
|
2311 |
vs->sg = vs->iov; |
2312 |
vs->total = 0;
|
2313 |
vs->len = 0;
|
2314 |
|
2315 |
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
2316 |
vs->sg, &vs->cnt); |
2317 |
|
2318 |
vs->fidp = lookup_fid(s, fid); |
2319 |
if (vs->fidp == NULL) { |
2320 |
err = -EINVAL; |
2321 |
goto out;
|
2322 |
} |
2323 |
|
2324 |
if (vs->fidp->fid_type == P9_FID_FILE) {
|
2325 |
if (vs->fidp->fs.fd == -1) { |
2326 |
err = -EINVAL; |
2327 |
goto out;
|
2328 |
} |
2329 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2330 |
/*
|
2331 |
* setxattr operation
|
2332 |
*/
|
2333 |
v9fs_xattr_write(s, vs); |
2334 |
return;
|
2335 |
} else {
|
2336 |
err = -EINVAL; |
2337 |
goto out;
|
2338 |
} |
2339 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2340 |
if (vs->total <= vs->count) {
|
2341 |
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off); |
2342 |
if (vs->len > 0) { |
2343 |
vs->off += vs->len; |
2344 |
} |
2345 |
err = vs->len; |
2346 |
v9fs_write_post_pwritev(s, vs, err); |
2347 |
} |
2348 |
return;
|
2349 |
out:
|
2350 |
complete_pdu(s, vs->pdu, err); |
2351 |
qemu_free(vs); |
2352 |
} |
2353 |
|
2354 |
static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
2355 |
{ |
2356 |
int err;
|
2357 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
2358 |
stat_to_qid(&vs->stbuf, &vs->qid); |
2359 |
|
2360 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
2361 |
err = vs->offset; |
2362 |
|
2363 |
complete_pdu(s, vs->pdu, err); |
2364 |
v9fs_string_free(&vs->name); |
2365 |
v9fs_string_free(&vs->extension); |
2366 |
v9fs_string_free(&vs->fullname); |
2367 |
qemu_free(vs); |
2368 |
} |
2369 |
|
2370 |
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
2371 |
{ |
2372 |
if (err == 0) { |
2373 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
2374 |
v9fs_create_post_getiounit(s, vs); |
2375 |
return;
|
2376 |
} |
2377 |
|
2378 |
complete_pdu(s, vs->pdu, err); |
2379 |
v9fs_string_free(&vs->name); |
2380 |
v9fs_string_free(&vs->extension); |
2381 |
v9fs_string_free(&vs->fullname); |
2382 |
qemu_free(vs); |
2383 |
} |
2384 |
|
2385 |
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) |
2386 |
{ |
2387 |
if (err) {
|
2388 |
err = -errno; |
2389 |
} |
2390 |
v9fs_post_create(s, vs, err); |
2391 |
} |
2392 |
|
2393 |
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, |
2394 |
int err)
|
2395 |
{ |
2396 |
if (!vs->fidp->fs.dir) {
|
2397 |
err = -errno; |
2398 |
} |
2399 |
vs->fidp->fid_type = P9_FID_DIR; |
2400 |
v9fs_post_create(s, vs, err); |
2401 |
} |
2402 |
|
2403 |
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, |
2404 |
int err)
|
2405 |
{ |
2406 |
if (err) {
|
2407 |
err = -errno; |
2408 |
goto out;
|
2409 |
} |
2410 |
|
2411 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname); |
2412 |
v9fs_create_post_opendir(s, vs, err); |
2413 |
return;
|
2414 |
|
2415 |
out:
|
2416 |
v9fs_post_create(s, vs, err); |
2417 |
} |
2418 |
|
2419 |
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) |
2420 |
{ |
2421 |
if (err) {
|
2422 |
err = -errno; |
2423 |
goto out;
|
2424 |
} |
2425 |
|
2426 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2427 |
v9fs_create_post_dir_lstat(s, vs, err); |
2428 |
return;
|
2429 |
|
2430 |
out:
|
2431 |
v9fs_post_create(s, vs, err); |
2432 |
} |
2433 |
|
2434 |
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2435 |
{ |
2436 |
if (err) {
|
2437 |
vs->fidp->fid_type = P9_FID_NONE; |
2438 |
close(vs->fidp->fs.fd); |
2439 |
err = -errno; |
2440 |
} |
2441 |
v9fs_post_create(s, vs, err); |
2442 |
return;
|
2443 |
} |
2444 |
|
2445 |
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) |
2446 |
{ |
2447 |
if (vs->fidp->fs.fd == -1) { |
2448 |
err = -errno; |
2449 |
goto out;
|
2450 |
} |
2451 |
vs->fidp->fid_type = P9_FID_FILE; |
2452 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
2453 |
v9fs_create_post_fstat(s, vs, err); |
2454 |
|
2455 |
return;
|
2456 |
|
2457 |
out:
|
2458 |
v9fs_post_create(s, vs, err); |
2459 |
|
2460 |
} |
2461 |
|
2462 |
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) |
2463 |
{ |
2464 |
|
2465 |
if (err == 0 || errno != ENOENT) { |
2466 |
err = -errno; |
2467 |
goto out;
|
2468 |
} |
2469 |
|
2470 |
if (vs->perm & P9_STAT_MODE_DIR) {
|
2471 |
err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777,
|
2472 |
vs->fidp->uid, -1);
|
2473 |
v9fs_create_post_mkdir(s, vs, err); |
2474 |
} else if (vs->perm & P9_STAT_MODE_SYMLINK) { |
2475 |
err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
2476 |
vs->fullname.data, -1);
|
2477 |
v9fs_create_post_perms(s, vs, err); |
2478 |
} else if (vs->perm & P9_STAT_MODE_LINK) { |
2479 |
int32_t nfid = atoi(vs->extension.data); |
2480 |
V9fsFidState *nfidp = lookup_fid(s, nfid); |
2481 |
if (nfidp == NULL) { |
2482 |
err = -errno; |
2483 |
v9fs_post_create(s, vs, err); |
2484 |
} |
2485 |
err = v9fs_do_link(s, &nfidp->path, &vs->fullname); |
2486 |
v9fs_create_post_perms(s, vs, err); |
2487 |
} else if (vs->perm & P9_STAT_MODE_DEVICE) { |
2488 |
char ctype;
|
2489 |
uint32_t major, minor; |
2490 |
mode_t nmode = 0;
|
2491 |
|
2492 |
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, |
2493 |
&minor) != 3) {
|
2494 |
err = -errno; |
2495 |
v9fs_post_create(s, vs, err); |
2496 |
} |
2497 |
|
2498 |
switch (ctype) {
|
2499 |
case 'c': |
2500 |
nmode = S_IFCHR; |
2501 |
break;
|
2502 |
case 'b': |
2503 |
nmode = S_IFBLK; |
2504 |
break;
|
2505 |
default:
|
2506 |
err = -EIO; |
2507 |
v9fs_post_create(s, vs, err); |
2508 |
} |
2509 |
|
2510 |
nmode |= vs->perm & 0777;
|
2511 |
err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
2512 |
makedev(major, minor), vs->fidp->uid, -1);
|
2513 |
v9fs_create_post_perms(s, vs, err); |
2514 |
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { |
2515 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
|
2516 |
0, vs->fidp->uid, -1); |
2517 |
v9fs_post_create(s, vs, err); |
2518 |
} else if (vs->perm & P9_STAT_MODE_SOCKET) { |
2519 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
|
2520 |
0, vs->fidp->uid, -1); |
2521 |
v9fs_post_create(s, vs, err); |
2522 |
} else {
|
2523 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
2524 |
-1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
|
2525 |
|
2526 |
v9fs_create_post_open2(s, vs, err); |
2527 |
} |
2528 |
|
2529 |
return;
|
2530 |
|
2531 |
out:
|
2532 |
v9fs_post_create(s, vs, err); |
2533 |
} |
2534 |
|
2535 |
static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
2536 |
{ |
2537 |
int32_t fid; |
2538 |
V9fsCreateState *vs; |
2539 |
int err = 0; |
2540 |
|
2541 |
vs = qemu_malloc(sizeof(*vs));
|
2542 |
vs->pdu = pdu; |
2543 |
vs->offset = 7;
|
2544 |
|
2545 |
v9fs_string_init(&vs->fullname); |
2546 |
|
2547 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
2548 |
&vs->perm, &vs->mode, &vs->extension); |
2549 |
|
2550 |
vs->fidp = lookup_fid(s, fid); |
2551 |
if (vs->fidp == NULL) { |
2552 |
err = -EINVAL; |
2553 |
goto out;
|
2554 |
} |
2555 |
|
2556 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
2557 |
vs->name.data); |
2558 |
|
2559 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2560 |
v9fs_create_post_lstat(s, vs, err); |
2561 |
return;
|
2562 |
|
2563 |
out:
|
2564 |
complete_pdu(s, vs->pdu, err); |
2565 |
v9fs_string_free(&vs->name); |
2566 |
v9fs_string_free(&vs->extension); |
2567 |
qemu_free(vs); |
2568 |
} |
2569 |
|
2570 |
static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
2571 |
{ |
2572 |
if (err == 0) { |
2573 |
stat_to_qid(&vs->stbuf, &vs->qid); |
2574 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
2575 |
err = vs->offset; |
2576 |
} else {
|
2577 |
err = -errno; |
2578 |
} |
2579 |
complete_pdu(s, vs->pdu, err); |
2580 |
v9fs_string_free(&vs->name); |
2581 |
v9fs_string_free(&vs->symname); |
2582 |
v9fs_string_free(&vs->fullname); |
2583 |
qemu_free(vs); |
2584 |
} |
2585 |
|
2586 |
static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, |
2587 |
int err)
|
2588 |
{ |
2589 |
if (err) {
|
2590 |
goto out;
|
2591 |
} |
2592 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2593 |
out:
|
2594 |
v9fs_post_symlink(s, vs, err); |
2595 |
} |
2596 |
|
2597 |
static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu) |
2598 |
{ |
2599 |
int32_t dfid; |
2600 |
V9fsSymlinkState *vs; |
2601 |
int err = 0; |
2602 |
gid_t gid; |
2603 |
|
2604 |
vs = qemu_malloc(sizeof(*vs));
|
2605 |
vs->pdu = pdu; |
2606 |
vs->offset = 7;
|
2607 |
|
2608 |
v9fs_string_init(&vs->fullname); |
2609 |
|
2610 |
pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
|
2611 |
&vs->symname, &gid); |
2612 |
|
2613 |
vs->dfidp = lookup_fid(s, dfid); |
2614 |
if (vs->dfidp == NULL) { |
2615 |
err = -EINVAL; |
2616 |
goto out;
|
2617 |
} |
2618 |
|
2619 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
|
2620 |
vs->name.data); |
2621 |
err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, |
2622 |
vs->fullname.data, gid); |
2623 |
v9fs_symlink_post_do_symlink(s, vs, err); |
2624 |
return;
|
2625 |
|
2626 |
out:
|
2627 |
complete_pdu(s, vs->pdu, err); |
2628 |
v9fs_string_free(&vs->name); |
2629 |
v9fs_string_free(&vs->symname); |
2630 |
qemu_free(vs); |
2631 |
} |
2632 |
|
2633 |
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
2634 |
{ |
2635 |
/* A nop call with no return */
|
2636 |
complete_pdu(s, pdu, 7);
|
2637 |
} |
2638 |
|
2639 |
static void v9fs_link(V9fsState *s, V9fsPDU *pdu) |
2640 |
{ |
2641 |
int32_t dfid, oldfid; |
2642 |
V9fsFidState *dfidp, *oldfidp; |
2643 |
V9fsString name, fullname; |
2644 |
size_t offset = 7;
|
2645 |
int err = 0; |
2646 |
|
2647 |
v9fs_string_init(&fullname); |
2648 |
|
2649 |
pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
|
2650 |
|
2651 |
dfidp = lookup_fid(s, dfid); |
2652 |
if (dfidp == NULL) { |
2653 |
err = -errno; |
2654 |
goto out;
|
2655 |
} |
2656 |
|
2657 |
oldfidp = lookup_fid(s, oldfid); |
2658 |
if (oldfidp == NULL) { |
2659 |
err = -errno; |
2660 |
goto out;
|
2661 |
} |
2662 |
|
2663 |
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
|
2664 |
err = offset; |
2665 |
err = v9fs_do_link(s, &oldfidp->path, &fullname); |
2666 |
if (err) {
|
2667 |
err = -errno; |
2668 |
} |
2669 |
v9fs_string_free(&fullname); |
2670 |
|
2671 |
out:
|
2672 |
v9fs_string_free(&name); |
2673 |
complete_pdu(s, pdu, err); |
2674 |
} |
2675 |
|
2676 |
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
2677 |
int err)
|
2678 |
{ |
2679 |
if (err < 0) { |
2680 |
err = -errno; |
2681 |
} else {
|
2682 |
err = vs->offset; |
2683 |
} |
2684 |
|
2685 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
2686 |
free_fid(s, vs->fidp->fid); |
2687 |
|
2688 |
complete_pdu(s, vs->pdu, err); |
2689 |
qemu_free(vs); |
2690 |
} |
2691 |
|
2692 |
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
2693 |
{ |
2694 |
int32_t fid; |
2695 |
V9fsRemoveState *vs; |
2696 |
int err = 0; |
2697 |
|
2698 |
vs = qemu_malloc(sizeof(*vs));
|
2699 |
vs->pdu = pdu; |
2700 |
vs->offset = 7;
|
2701 |
|
2702 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
2703 |
|
2704 |
vs->fidp = lookup_fid(s, fid); |
2705 |
if (vs->fidp == NULL) { |
2706 |
err = -EINVAL; |
2707 |
goto out;
|
2708 |
} |
2709 |
|
2710 |
err = v9fs_do_remove(s, &vs->fidp->path); |
2711 |
v9fs_remove_post_remove(s, vs, err); |
2712 |
return;
|
2713 |
|
2714 |
out:
|
2715 |
complete_pdu(s, pdu, err); |
2716 |
qemu_free(vs); |
2717 |
} |
2718 |
|
2719 |
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2720 |
{ |
2721 |
if (err < 0) { |
2722 |
goto out;
|
2723 |
} |
2724 |
|
2725 |
err = vs->offset; |
2726 |
|
2727 |
out:
|
2728 |
v9fs_stat_free(&vs->v9stat); |
2729 |
complete_pdu(s, vs->pdu, err); |
2730 |
qemu_free(vs); |
2731 |
} |
2732 |
|
2733 |
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) |
2734 |
{ |
2735 |
if (err < 0) { |
2736 |
goto out;
|
2737 |
} |
2738 |
if (vs->v9stat.length != -1) { |
2739 |
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { |
2740 |
err = -errno; |
2741 |
} |
2742 |
} |
2743 |
v9fs_wstat_post_truncate(s, vs, err); |
2744 |
return;
|
2745 |
|
2746 |
out:
|
2747 |
v9fs_stat_free(&vs->v9stat); |
2748 |
complete_pdu(s, vs->pdu, err); |
2749 |
qemu_free(vs); |
2750 |
} |
2751 |
|
2752 |
static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs) |
2753 |
{ |
2754 |
int err = 0; |
2755 |
char *old_name, *new_name;
|
2756 |
char *end;
|
2757 |
|
2758 |
if (vs->newdirfid != -1) { |
2759 |
V9fsFidState *dirfidp; |
2760 |
dirfidp = lookup_fid(s, vs->newdirfid); |
2761 |
|
2762 |
if (dirfidp == NULL) { |
2763 |
err = -ENOENT; |
2764 |
goto out;
|
2765 |
} |
2766 |
|
2767 |
BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
2768 |
|
2769 |
new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2);
|
2770 |
|
2771 |
strcpy(new_name, dirfidp->path.data); |
2772 |
strcat(new_name, "/");
|
2773 |
strcat(new_name + dirfidp->path.size, vs->name.data); |
2774 |
} else {
|
2775 |
old_name = vs->fidp->path.data; |
2776 |
end = strrchr(old_name, '/');
|
2777 |
if (end) {
|
2778 |
end++; |
2779 |
} else {
|
2780 |
end = old_name; |
2781 |
} |
2782 |
new_name = qemu_mallocz(end - old_name + vs->name.size + 1);
|
2783 |
|
2784 |
strncat(new_name, old_name, end - old_name); |
2785 |
strncat(new_name + (end - old_name), vs->name.data, vs->name.size); |
2786 |
} |
2787 |
|
2788 |
v9fs_string_free(&vs->name); |
2789 |
vs->name.data = qemu_strdup(new_name); |
2790 |
vs->name.size = strlen(new_name); |
2791 |
|
2792 |
if (strcmp(new_name, vs->fidp->path.data) != 0) { |
2793 |
if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) {
|
2794 |
err = -errno; |
2795 |
} else {
|
2796 |
V9fsFidState *fidp; |
2797 |
/*
|
2798 |
* Fixup fid's pointing to the old name to
|
2799 |
* start pointing to the new name
|
2800 |
*/
|
2801 |
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
2802 |
if (vs->fidp == fidp) {
|
2803 |
/*
|
2804 |
* we replace name of this fid towards the end
|
2805 |
* so that our below strcmp will work
|
2806 |
*/
|
2807 |
continue;
|
2808 |
} |
2809 |
if (!strncmp(vs->fidp->path.data, fidp->path.data,
|
2810 |
strlen(vs->fidp->path.data))) { |
2811 |
/* replace the name */
|
2812 |
v9fs_fix_path(&fidp->path, &vs->name, |
2813 |
strlen(vs->fidp->path.data)); |
2814 |
} |
2815 |
} |
2816 |
v9fs_string_copy(&vs->fidp->path, &vs->name); |
2817 |
} |
2818 |
} |
2819 |
out:
|
2820 |
v9fs_string_free(&vs->name); |
2821 |
return err;
|
2822 |
} |
2823 |
|
2824 |
static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err) |
2825 |
{ |
2826 |
complete_pdu(s, vs->pdu, err); |
2827 |
qemu_free(vs); |
2828 |
} |
2829 |
|
2830 |
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
2831 |
{ |
2832 |
if (err < 0) { |
2833 |
goto out;
|
2834 |
} |
2835 |
|
2836 |
if (vs->v9stat.name.size != 0) { |
2837 |
V9fsRenameState *vr; |
2838 |
|
2839 |
vr = qemu_mallocz(sizeof(V9fsRenameState));
|
2840 |
vr->newdirfid = -1;
|
2841 |
vr->pdu = vs->pdu; |
2842 |
vr->fidp = vs->fidp; |
2843 |
vr->offset = vs->offset; |
2844 |
vr->name.size = vs->v9stat.name.size; |
2845 |
vr->name.data = qemu_strdup(vs->v9stat.name.data); |
2846 |
|
2847 |
err = v9fs_complete_rename(s, vr); |
2848 |
qemu_free(vr); |
2849 |
} |
2850 |
v9fs_wstat_post_rename(s, vs, err); |
2851 |
return;
|
2852 |
|
2853 |
out:
|
2854 |
v9fs_stat_free(&vs->v9stat); |
2855 |
complete_pdu(s, vs->pdu, err); |
2856 |
qemu_free(vs); |
2857 |
} |
2858 |
|
2859 |
static void v9fs_rename(V9fsState *s, V9fsPDU *pdu) |
2860 |
{ |
2861 |
int32_t fid; |
2862 |
V9fsRenameState *vs; |
2863 |
ssize_t err = 0;
|
2864 |
|
2865 |
vs = qemu_malloc(sizeof(*vs));
|
2866 |
vs->pdu = pdu; |
2867 |
vs->offset = 7;
|
2868 |
|
2869 |
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name);
|
2870 |
|
2871 |
vs->fidp = lookup_fid(s, fid); |
2872 |
if (vs->fidp == NULL) { |
2873 |
err = -ENOENT; |
2874 |
goto out;
|
2875 |
} |
2876 |
|
2877 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
2878 |
|
2879 |
err = v9fs_complete_rename(s, vs); |
2880 |
v9fs_rename_post_rename(s, vs, err); |
2881 |
return;
|
2882 |
out:
|
2883 |
complete_pdu(s, vs->pdu, err); |
2884 |
qemu_free(vs); |
2885 |
} |
2886 |
|
2887 |
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2888 |
{ |
2889 |
if (err < 0) { |
2890 |
goto out;
|
2891 |
} |
2892 |
|
2893 |
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
2894 |
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
2895 |
vs->v9stat.n_gid)) { |
2896 |
err = -errno; |
2897 |
} |
2898 |
} |
2899 |
v9fs_wstat_post_chown(s, vs, err); |
2900 |
return;
|
2901 |
|
2902 |
out:
|
2903 |
v9fs_stat_free(&vs->v9stat); |
2904 |
complete_pdu(s, vs->pdu, err); |
2905 |
qemu_free(vs); |
2906 |
} |
2907 |
|
2908 |
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) |
2909 |
{ |
2910 |
if (err < 0) { |
2911 |
goto out;
|
2912 |
} |
2913 |
|
2914 |
if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
2915 |
struct timespec times[2]; |
2916 |
if (vs->v9stat.atime != -1) { |
2917 |
times[0].tv_sec = vs->v9stat.atime;
|
2918 |
times[0].tv_nsec = 0; |
2919 |
} else {
|
2920 |
times[0].tv_nsec = UTIME_OMIT;
|
2921 |
} |
2922 |
if (vs->v9stat.mtime != -1) { |
2923 |
times[1].tv_sec = vs->v9stat.mtime;
|
2924 |
times[1].tv_nsec = 0; |
2925 |
} else {
|
2926 |
times[1].tv_nsec = UTIME_OMIT;
|
2927 |
} |
2928 |
|
2929 |
if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
|
2930 |
err = -errno; |
2931 |
} |
2932 |
} |
2933 |
|
2934 |
v9fs_wstat_post_utime(s, vs, err); |
2935 |
return;
|
2936 |
|
2937 |
out:
|
2938 |
v9fs_stat_free(&vs->v9stat); |
2939 |
complete_pdu(s, vs->pdu, err); |
2940 |
qemu_free(vs); |
2941 |
} |
2942 |
|
2943 |
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) |
2944 |
{ |
2945 |
if (err == -1) { |
2946 |
err = -errno; |
2947 |
} |
2948 |
v9fs_stat_free(&vs->v9stat); |
2949 |
complete_pdu(s, vs->pdu, err); |
2950 |
qemu_free(vs); |
2951 |
} |
2952 |
|
2953 |
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) |
2954 |
{ |
2955 |
uint32_t v9_mode; |
2956 |
|
2957 |
if (err == -1) { |
2958 |
err = -errno; |
2959 |
goto out;
|
2960 |
} |
2961 |
|
2962 |
v9_mode = stat_to_v9mode(&vs->stbuf); |
2963 |
|
2964 |
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
2965 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) { |
2966 |
/* Attempting to change the type */
|
2967 |
err = -EIO; |
2968 |
goto out;
|
2969 |
} |
2970 |
|
2971 |
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
2972 |
&vs->v9stat.extension))) { |
2973 |
err = -errno; |
2974 |
} |
2975 |
v9fs_wstat_post_chmod(s, vs, err); |
2976 |
return;
|
2977 |
|
2978 |
out:
|
2979 |
v9fs_stat_free(&vs->v9stat); |
2980 |
complete_pdu(s, vs->pdu, err); |
2981 |
qemu_free(vs); |
2982 |
} |
2983 |
|
2984 |
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
2985 |
{ |
2986 |
int32_t fid; |
2987 |
V9fsWstatState *vs; |
2988 |
int err = 0; |
2989 |
|
2990 |
vs = qemu_malloc(sizeof(*vs));
|
2991 |
vs->pdu = pdu; |
2992 |
vs->offset = 7;
|
2993 |
|
2994 |
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
2995 |
|
2996 |
vs->fidp = lookup_fid(s, fid); |
2997 |
if (vs->fidp == NULL) { |
2998 |
err = -EINVAL; |
2999 |
goto out;
|
3000 |
} |
3001 |
|
3002 |
/* do we need to sync the file? */
|
3003 |
if (donttouch_stat(&vs->v9stat)) {
|
3004 |
err = v9fs_do_fsync(s, vs->fidp->fs.fd); |
3005 |
v9fs_wstat_post_fsync(s, vs, err); |
3006 |
return;
|
3007 |
} |
3008 |
|
3009 |
if (vs->v9stat.mode != -1) { |
3010 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
3011 |
v9fs_wstat_post_lstat(s, vs, err); |
3012 |
return;
|
3013 |
} |
3014 |
|
3015 |
v9fs_wstat_post_chmod(s, vs, err); |
3016 |
return;
|
3017 |
|
3018 |
out:
|
3019 |
v9fs_stat_free(&vs->v9stat); |
3020 |
complete_pdu(s, vs->pdu, err); |
3021 |
qemu_free(vs); |
3022 |
} |
3023 |
|
3024 |
static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err) |
3025 |
{ |
3026 |
int32_t bsize_factor; |
3027 |
|
3028 |
if (err) {
|
3029 |
err = -errno; |
3030 |
goto out;
|
3031 |
} |
3032 |
|
3033 |
/*
|
3034 |
* compute bsize factor based on host file system block size
|
3035 |
* and client msize
|
3036 |
*/
|
3037 |
bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize; |
3038 |
if (!bsize_factor) {
|
3039 |
bsize_factor = 1;
|
3040 |
} |
3041 |
vs->v9statfs.f_type = vs->stbuf.f_type; |
3042 |
vs->v9statfs.f_bsize = vs->stbuf.f_bsize; |
3043 |
vs->v9statfs.f_bsize *= bsize_factor; |
3044 |
/*
|
3045 |
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
3046 |
* adjust(divide) the number of blocks, free blocks and available
|
3047 |
* blocks by bsize factor
|
3048 |
*/
|
3049 |
vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor; |
3050 |
vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor; |
3051 |
vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor; |
3052 |
vs->v9statfs.f_files = vs->stbuf.f_files; |
3053 |
vs->v9statfs.f_ffree = vs->stbuf.f_ffree; |
3054 |
vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] | |
3055 |
(unsigned long long)vs->stbuf.f_fsid.__val[1] << 32; |
3056 |
vs->v9statfs.f_namelen = vs->stbuf.f_namelen; |
3057 |
|
3058 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
|
3059 |
vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks, |
3060 |
vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files, |
3061 |
vs->v9statfs.f_ffree, vs->v9statfs.fsid_val, |
3062 |
vs->v9statfs.f_namelen); |
3063 |
|
3064 |
out:
|
3065 |
complete_pdu(s, vs->pdu, vs->offset); |
3066 |
qemu_free(vs); |
3067 |
} |
3068 |
|
3069 |
static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu) |
3070 |
{ |
3071 |
V9fsStatfsState *vs; |
3072 |
ssize_t err = 0;
|
3073 |
|
3074 |
vs = qemu_malloc(sizeof(*vs));
|
3075 |
vs->pdu = pdu; |
3076 |
vs->offset = 7;
|
3077 |
|
3078 |
memset(&vs->v9statfs, 0, sizeof(vs->v9statfs)); |
3079 |
|
3080 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
|
3081 |
|
3082 |
vs->fidp = lookup_fid(s, vs->fid); |
3083 |
if (vs->fidp == NULL) { |
3084 |
err = -ENOENT; |
3085 |
goto out;
|
3086 |
} |
3087 |
|
3088 |
err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf); |
3089 |
v9fs_statfs_post_statfs(s, vs, err); |
3090 |
return;
|
3091 |
|
3092 |
out:
|
3093 |
complete_pdu(s, vs->pdu, err); |
3094 |
qemu_free(vs); |
3095 |
} |
3096 |
|
3097 |
static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3098 |
{ |
3099 |
if (err == -1) { |
3100 |
err = -errno; |
3101 |
goto out;
|
3102 |
} |
3103 |
|
3104 |
stat_to_qid(&vs->stbuf, &vs->qid); |
3105 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
3106 |
err = vs->offset; |
3107 |
out:
|
3108 |
complete_pdu(s, vs->pdu, err); |
3109 |
v9fs_string_free(&vs->fullname); |
3110 |
v9fs_string_free(&vs->name); |
3111 |
qemu_free(vs); |
3112 |
} |
3113 |
|
3114 |
static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err) |
3115 |
{ |
3116 |
if (err == -1) { |
3117 |
err = -errno; |
3118 |
goto out;
|
3119 |
} |
3120 |
|
3121 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
3122 |
v9fs_mknod_post_lstat(s, vs, err); |
3123 |
return;
|
3124 |
out:
|
3125 |
complete_pdu(s, vs->pdu, err); |
3126 |
v9fs_string_free(&vs->fullname); |
3127 |
v9fs_string_free(&vs->name); |
3128 |
qemu_free(vs); |
3129 |
} |
3130 |
|
3131 |
static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu) |
3132 |
{ |
3133 |
int32_t fid; |
3134 |
V9fsMkState *vs; |
3135 |
int err = 0; |
3136 |
V9fsFidState *fidp; |
3137 |
gid_t gid; |
3138 |
int mode;
|
3139 |
int major, minor;
|
3140 |
|
3141 |
vs = qemu_malloc(sizeof(*vs));
|
3142 |
vs->pdu = pdu; |
3143 |
vs->offset = 7;
|
3144 |
|
3145 |
v9fs_string_init(&vs->fullname); |
3146 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode,
|
3147 |
&major, &minor, &gid); |
3148 |
|
3149 |
fidp = lookup_fid(s, fid); |
3150 |
if (fidp == NULL) { |
3151 |
err = -ENOENT; |
3152 |
goto out;
|
3153 |
} |
3154 |
|
3155 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
3156 |
err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor), |
3157 |
fidp->uid, gid); |
3158 |
v9fs_mknod_post_mknod(s, vs, err); |
3159 |
return;
|
3160 |
|
3161 |
out:
|
3162 |
complete_pdu(s, vs->pdu, err); |
3163 |
v9fs_string_free(&vs->fullname); |
3164 |
v9fs_string_free(&vs->name); |
3165 |
qemu_free(vs); |
3166 |
} |
3167 |
|
3168 |
/*
|
3169 |
* Implement posix byte range locking code
|
3170 |
* Server side handling of locking code is very simple, because 9p server in
|
3171 |
* QEMU can handle only one client. And most of the lock handling
|
3172 |
* (like conflict, merging) etc is done by the VFS layer itself, so no need to
|
3173 |
* do any thing in * qemu 9p server side lock code path.
|
3174 |
* So when a TLOCK request comes, always return success
|
3175 |
*/
|
3176 |
|
3177 |
static void v9fs_lock(V9fsState *s, V9fsPDU *pdu) |
3178 |
{ |
3179 |
int32_t fid, err = 0;
|
3180 |
V9fsLockState *vs; |
3181 |
|
3182 |
vs = qemu_mallocz(sizeof(*vs));
|
3183 |
vs->pdu = pdu; |
3184 |
vs->offset = 7;
|
3185 |
|
3186 |
vs->flock = qemu_malloc(sizeof(*vs->flock));
|
3187 |
pdu_unmarshal(vs->pdu, vs->offset, "dbdqqds", &fid, &vs->flock->type,
|
3188 |
&vs->flock->flags, &vs->flock->start, &vs->flock->length, |
3189 |
&vs->flock->proc_id, &vs->flock->client_id); |
3190 |
|
3191 |
vs->status = P9_LOCK_ERROR; |
3192 |
|
3193 |
/* We support only block flag now (that too ignored currently) */
|
3194 |
if (vs->flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
|
3195 |
err = -EINVAL; |
3196 |
goto out;
|
3197 |
} |
3198 |
vs->fidp = lookup_fid(s, fid); |
3199 |
if (vs->fidp == NULL) { |
3200 |
err = -ENOENT; |
3201 |
goto out;
|
3202 |
} |
3203 |
|
3204 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
3205 |
if (err < 0) { |
3206 |
err = -errno; |
3207 |
goto out;
|
3208 |
} |
3209 |
vs->status = P9_LOCK_SUCCESS; |
3210 |
out:
|
3211 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "b", vs->status);
|
3212 |
complete_pdu(s, vs->pdu, err); |
3213 |
qemu_free(vs->flock); |
3214 |
qemu_free(vs); |
3215 |
} |
3216 |
|
3217 |
/*
|
3218 |
* When a TGETLOCK request comes, always return success because all lock
|
3219 |
* handling is done by client's VFS layer.
|
3220 |
*/
|
3221 |
|
3222 |
static void v9fs_getlock(V9fsState *s, V9fsPDU *pdu) |
3223 |
{ |
3224 |
int32_t fid, err = 0;
|
3225 |
V9fsGetlockState *vs; |
3226 |
|
3227 |
vs = qemu_mallocz(sizeof(*vs));
|
3228 |
vs->pdu = pdu; |
3229 |
vs->offset = 7;
|
3230 |
|
3231 |
vs->glock = qemu_malloc(sizeof(*vs->glock));
|
3232 |
pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type,
|
3233 |
&vs->glock->start, &vs->glock->length, &vs->glock->proc_id, |
3234 |
&vs->glock->client_id); |
3235 |
|
3236 |
vs->fidp = lookup_fid(s, fid); |
3237 |
if (vs->fidp == NULL) { |
3238 |
err = -ENOENT; |
3239 |
goto out;
|
3240 |
} |
3241 |
|
3242 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
3243 |
if (err < 0) { |
3244 |
err = -errno; |
3245 |
goto out;
|
3246 |
} |
3247 |
vs->glock->type = F_UNLCK; |
3248 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type,
|
3249 |
vs->glock->start, vs->glock->length, vs->glock->proc_id, |
3250 |
&vs->glock->client_id); |
3251 |
out:
|
3252 |
complete_pdu(s, vs->pdu, err); |
3253 |
qemu_free(vs->glock); |
3254 |
qemu_free(vs); |
3255 |
} |
3256 |
|
3257 |
static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3258 |
{ |
3259 |
if (err == -1) { |
3260 |
err = -errno; |
3261 |
goto out;
|
3262 |
} |
3263 |
|
3264 |
stat_to_qid(&vs->stbuf, &vs->qid); |
3265 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
3266 |
err = vs->offset; |
3267 |
out:
|
3268 |
complete_pdu(s, vs->pdu, err); |
3269 |
v9fs_string_free(&vs->fullname); |
3270 |
v9fs_string_free(&vs->name); |
3271 |
qemu_free(vs); |
3272 |
} |
3273 |
|
3274 |
static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err) |
3275 |
{ |
3276 |
if (err == -1) { |
3277 |
err = -errno; |
3278 |
goto out;
|
3279 |
} |
3280 |
|
3281 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
3282 |
v9fs_mkdir_post_lstat(s, vs, err); |
3283 |
return;
|
3284 |
out:
|
3285 |
complete_pdu(s, vs->pdu, err); |
3286 |
v9fs_string_free(&vs->fullname); |
3287 |
v9fs_string_free(&vs->name); |
3288 |
qemu_free(vs); |
3289 |
} |
3290 |
|
3291 |
static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu) |
3292 |
{ |
3293 |
int32_t fid; |
3294 |
V9fsMkState *vs; |
3295 |
int err = 0; |
3296 |
V9fsFidState *fidp; |
3297 |
gid_t gid; |
3298 |
int mode;
|
3299 |
|
3300 |
vs = qemu_malloc(sizeof(*vs));
|
3301 |
vs->pdu = pdu; |
3302 |
vs->offset = 7;
|
3303 |
|
3304 |
v9fs_string_init(&vs->fullname); |
3305 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode,
|
3306 |
&gid); |
3307 |
|
3308 |
fidp = lookup_fid(s, fid); |
3309 |
if (fidp == NULL) { |
3310 |
err = -ENOENT; |
3311 |
goto out;
|
3312 |
} |
3313 |
|
3314 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
3315 |
err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid); |
3316 |
v9fs_mkdir_post_mkdir(s, vs, err); |
3317 |
return;
|
3318 |
|
3319 |
out:
|
3320 |
complete_pdu(s, vs->pdu, err); |
3321 |
v9fs_string_free(&vs->fullname); |
3322 |
v9fs_string_free(&vs->name); |
3323 |
qemu_free(vs); |
3324 |
} |
3325 |
|
3326 |
static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err) |
3327 |
{ |
3328 |
|
3329 |
if (err < 0) { |
3330 |
err = -errno; |
3331 |
free_fid(s, vs->xattr_fidp->fid); |
3332 |
goto out;
|
3333 |
} |
3334 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
3335 |
err = vs->offset; |
3336 |
out:
|
3337 |
complete_pdu(s, vs->pdu, err); |
3338 |
v9fs_string_free(&vs->name); |
3339 |
qemu_free(vs); |
3340 |
return;
|
3341 |
} |
3342 |
|
3343 |
static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err) |
3344 |
{ |
3345 |
if (err < 0) { |
3346 |
err = -errno; |
3347 |
free_fid(s, vs->xattr_fidp->fid); |
3348 |
goto out;
|
3349 |
} |
3350 |
/*
|
3351 |
* Read the xattr value
|
3352 |
*/
|
3353 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
3354 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
3355 |
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
3356 |
if (vs->size) {
|
3357 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
3358 |
err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, |
3359 |
&vs->name, vs->xattr_fidp->fs.xattr.value, |
3360 |
vs->xattr_fidp->fs.xattr.len); |
3361 |
} |
3362 |
v9fs_post_xattr_getvalue(s, vs, err); |
3363 |
return;
|
3364 |
out:
|
3365 |
complete_pdu(s, vs->pdu, err); |
3366 |
v9fs_string_free(&vs->name); |
3367 |
qemu_free(vs); |
3368 |
} |
3369 |
|
3370 |
static void v9fs_post_lxattr_getvalue(V9fsState *s, |
3371 |
V9fsXattrState *vs, int err)
|
3372 |
{ |
3373 |
if (err < 0) { |
3374 |
err = -errno; |
3375 |
free_fid(s, vs->xattr_fidp->fid); |
3376 |
goto out;
|
3377 |
} |
3378 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
3379 |
err = vs->offset; |
3380 |
out:
|
3381 |
complete_pdu(s, vs->pdu, err); |
3382 |
v9fs_string_free(&vs->name); |
3383 |
qemu_free(vs); |
3384 |
return;
|
3385 |
} |
3386 |
|
3387 |
static void v9fs_post_lxattr_check(V9fsState *s, |
3388 |
V9fsXattrState *vs, ssize_t err) |
3389 |
{ |
3390 |
if (err < 0) { |
3391 |
err = -errno; |
3392 |
free_fid(s, vs->xattr_fidp->fid); |
3393 |
goto out;
|
3394 |
} |
3395 |
/*
|
3396 |
* Read the xattr value
|
3397 |
*/
|
3398 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
3399 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
3400 |
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
3401 |
if (vs->size) {
|
3402 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
3403 |
err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, |
3404 |
vs->xattr_fidp->fs.xattr.value, |
3405 |
vs->xattr_fidp->fs.xattr.len); |
3406 |
} |
3407 |
v9fs_post_lxattr_getvalue(s, vs, err); |
3408 |
return;
|
3409 |
out:
|
3410 |
complete_pdu(s, vs->pdu, err); |
3411 |
v9fs_string_free(&vs->name); |
3412 |
qemu_free(vs); |
3413 |
} |
3414 |
|
3415 |
static void v9fs_xattrwalk(V9fsState *s, V9fsPDU *pdu) |
3416 |
{ |
3417 |
ssize_t err = 0;
|
3418 |
V9fsXattrState *vs; |
3419 |
int32_t fid, newfid; |
3420 |
|
3421 |
vs = qemu_malloc(sizeof(*vs));
|
3422 |
vs->pdu = pdu; |
3423 |
vs->offset = 7;
|
3424 |
|
3425 |
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name);
|
3426 |
vs->file_fidp = lookup_fid(s, fid); |
3427 |
if (vs->file_fidp == NULL) { |
3428 |
err = -ENOENT; |
3429 |
goto out;
|
3430 |
} |
3431 |
|
3432 |
vs->xattr_fidp = alloc_fid(s, newfid); |
3433 |
if (vs->xattr_fidp == NULL) { |
3434 |
err = -EINVAL; |
3435 |
goto out;
|
3436 |
} |
3437 |
|
3438 |
v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path); |
3439 |
if (vs->name.data[0] == 0) { |
3440 |
/*
|
3441 |
* listxattr request. Get the size first
|
3442 |
*/
|
3443 |
vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, |
3444 |
NULL, 0); |
3445 |
if (vs->size < 0) { |
3446 |
err = vs->size; |
3447 |
} |
3448 |
v9fs_post_lxattr_check(s, vs, err); |
3449 |
return;
|
3450 |
} else {
|
3451 |
/*
|
3452 |
* specific xattr fid. We check for xattr
|
3453 |
* presence also collect the xattr size
|
3454 |
*/
|
3455 |
vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, |
3456 |
&vs->name, NULL, 0); |
3457 |
if (vs->size < 0) { |
3458 |
err = vs->size; |
3459 |
} |
3460 |
v9fs_post_xattr_check(s, vs, err); |
3461 |
return;
|
3462 |
} |
3463 |
out:
|
3464 |
complete_pdu(s, vs->pdu, err); |
3465 |
v9fs_string_free(&vs->name); |
3466 |
qemu_free(vs); |
3467 |
} |
3468 |
|
3469 |
static void v9fs_xattrcreate(V9fsState *s, V9fsPDU *pdu) |
3470 |
{ |
3471 |
int flags;
|
3472 |
int32_t fid; |
3473 |
ssize_t err = 0;
|
3474 |
V9fsXattrState *vs; |
3475 |
|
3476 |
vs = qemu_malloc(sizeof(*vs));
|
3477 |
vs->pdu = pdu; |
3478 |
vs->offset = 7;
|
3479 |
|
3480 |
pdu_unmarshal(vs->pdu, vs->offset, "dsqd",
|
3481 |
&fid, &vs->name, &vs->size, &flags); |
3482 |
|
3483 |
vs->file_fidp = lookup_fid(s, fid); |
3484 |
if (vs->file_fidp == NULL) { |
3485 |
err = -EINVAL; |
3486 |
goto out;
|
3487 |
} |
3488 |
|
3489 |
/* Make the file fid point to xattr */
|
3490 |
vs->xattr_fidp = vs->file_fidp; |
3491 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
3492 |
vs->xattr_fidp->fs.xattr.copied_len = 0;
|
3493 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
3494 |
vs->xattr_fidp->fs.xattr.flags = flags; |
3495 |
v9fs_string_init(&vs->xattr_fidp->fs.xattr.name); |
3496 |
v9fs_string_copy(&vs->xattr_fidp->fs.xattr.name, &vs->name); |
3497 |
if (vs->size)
|
3498 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
3499 |
else
|
3500 |
vs->xattr_fidp->fs.xattr.value = NULL;
|
3501 |
|
3502 |
out:
|
3503 |
complete_pdu(s, vs->pdu, err); |
3504 |
v9fs_string_free(&vs->name); |
3505 |
qemu_free(vs); |
3506 |
} |
3507 |
|
3508 |
static void v9fs_readlink_post_readlink(V9fsState *s, V9fsReadLinkState *vs, |
3509 |
int err)
|
3510 |
{ |
3511 |
if (err < 0) { |
3512 |
err = -errno; |
3513 |
goto out;
|
3514 |
} |
3515 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "s", &vs->target);
|
3516 |
err = vs->offset; |
3517 |
out:
|
3518 |
complete_pdu(s, vs->pdu, err); |
3519 |
v9fs_string_free(&vs->target); |
3520 |
qemu_free(vs); |
3521 |
} |
3522 |
|
3523 |
static void v9fs_readlink(V9fsState *s, V9fsPDU *pdu) |
3524 |
{ |
3525 |
int32_t fid; |
3526 |
V9fsReadLinkState *vs; |
3527 |
int err = 0; |
3528 |
V9fsFidState *fidp; |
3529 |
|
3530 |
vs = qemu_malloc(sizeof(*vs));
|
3531 |
vs->pdu = pdu; |
3532 |
vs->offset = 7;
|
3533 |
|
3534 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
3535 |
|
3536 |
fidp = lookup_fid(s, fid); |
3537 |
if (fidp == NULL) { |
3538 |
err = -ENOENT; |
3539 |
goto out;
|
3540 |
} |
3541 |
|
3542 |
v9fs_string_init(&vs->target); |
3543 |
err = v9fs_do_readlink(s, &fidp->path, &vs->target); |
3544 |
v9fs_readlink_post_readlink(s, vs, err); |
3545 |
return;
|
3546 |
out:
|
3547 |
complete_pdu(s, vs->pdu, err); |
3548 |
qemu_free(vs); |
3549 |
} |
3550 |
|
3551 |
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
3552 |
|
3553 |
static pdu_handler_t *pdu_handlers[] = {
|
3554 |
[P9_TREADDIR] = v9fs_readdir, |
3555 |
[P9_TSTATFS] = v9fs_statfs, |
3556 |
[P9_TGETATTR] = v9fs_getattr, |
3557 |
[P9_TSETATTR] = v9fs_setattr, |
3558 |
[P9_TXATTRWALK] = v9fs_xattrwalk, |
3559 |
[P9_TXATTRCREATE] = v9fs_xattrcreate, |
3560 |
[P9_TMKNOD] = v9fs_mknod, |
3561 |
[P9_TRENAME] = v9fs_rename, |
3562 |
[P9_TLOCK] = v9fs_lock, |
3563 |
[P9_TGETLOCK] = v9fs_getlock, |
3564 |
[P9_TREADLINK] = v9fs_readlink, |
3565 |
[P9_TMKDIR] = v9fs_mkdir, |
3566 |
[P9_TVERSION] = v9fs_version, |
3567 |
[P9_TLOPEN] = v9fs_open, |
3568 |
[P9_TATTACH] = v9fs_attach, |
3569 |
[P9_TSTAT] = v9fs_stat, |
3570 |
[P9_TWALK] = v9fs_walk, |
3571 |
[P9_TCLUNK] = v9fs_clunk, |
3572 |
[P9_TFSYNC] = v9fs_fsync, |
3573 |
[P9_TOPEN] = v9fs_open, |
3574 |
[P9_TREAD] = v9fs_read, |
3575 |
#if 0
|
3576 |
[P9_TAUTH] = v9fs_auth,
|
3577 |
#endif
|
3578 |
[P9_TFLUSH] = v9fs_flush, |
3579 |
[P9_TLINK] = v9fs_link, |
3580 |
[P9_TSYMLINK] = v9fs_symlink, |
3581 |
[P9_TCREATE] = v9fs_create, |
3582 |
[P9_TLCREATE] = v9fs_lcreate, |
3583 |
[P9_TWRITE] = v9fs_write, |
3584 |
[P9_TWSTAT] = v9fs_wstat, |
3585 |
[P9_TREMOVE] = v9fs_remove, |
3586 |
}; |
3587 |
|
3588 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3589 |
{ |
3590 |
pdu_handler_t *handler; |
3591 |
|
3592 |
if (debug_9p_pdu) {
|
3593 |
pprint_pdu(pdu); |
3594 |
} |
3595 |
|
3596 |
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); |
3597 |
|
3598 |
handler = pdu_handlers[pdu->id]; |
3599 |
BUG_ON(handler == NULL);
|
3600 |
|
3601 |
handler(s, pdu); |
3602 |
} |
3603 |
|
3604 |
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
3605 |
{ |
3606 |
V9fsState *s = (V9fsState *)vdev; |
3607 |
V9fsPDU *pdu; |
3608 |
ssize_t len; |
3609 |
|
3610 |
while ((pdu = alloc_pdu(s)) &&
|
3611 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
3612 |
uint8_t *ptr; |
3613 |
|
3614 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
3615 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
3616 |
|
3617 |
ptr = pdu->elem.out_sg[0].iov_base;
|
3618 |
|
3619 |
memcpy(&pdu->size, ptr, 4);
|
3620 |
pdu->id = ptr[4];
|
3621 |
memcpy(&pdu->tag, ptr + 5, 2); |
3622 |
|
3623 |
submit_pdu(s, pdu); |
3624 |
} |
3625 |
|
3626 |
free_pdu(s, pdu); |
3627 |
} |
3628 |
|
3629 |
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
3630 |
{ |
3631 |
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
3632 |
return features;
|
3633 |
} |
3634 |
|
3635 |
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
3636 |
{ |
3637 |
return (V9fsState *)vdev;
|
3638 |
} |
3639 |
|
3640 |
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) |
3641 |
{ |
3642 |
struct virtio_9p_config *cfg;
|
3643 |
V9fsState *s = to_virtio_9p(vdev); |
3644 |
|
3645 |
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + |
3646 |
s->tag_len); |
3647 |
stw_raw(&cfg->tag_len, s->tag_len); |
3648 |
memcpy(cfg->tag, s->tag, s->tag_len); |
3649 |
memcpy(config, cfg, s->config_size); |
3650 |
qemu_free(cfg); |
3651 |
} |
3652 |
|
3653 |
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) |
3654 |
{ |
3655 |
V9fsState *s; |
3656 |
int i, len;
|
3657 |
struct stat stat;
|
3658 |
FsTypeEntry *fse; |
3659 |
|
3660 |
|
3661 |
s = (V9fsState *)virtio_common_init("virtio-9p",
|
3662 |
VIRTIO_ID_9P, |
3663 |
sizeof(struct virtio_9p_config)+ |
3664 |
MAX_TAG_LEN, |
3665 |
sizeof(V9fsState));
|
3666 |
|
3667 |
/* initialize pdu allocator */
|
3668 |
QLIST_INIT(&s->free_list); |
3669 |
for (i = 0; i < (MAX_REQ - 1); i++) { |
3670 |
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
3671 |
} |
3672 |
|
3673 |
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); |
3674 |
|
3675 |
fse = get_fsdev_fsentry(conf->fsdev_id); |
3676 |
|
3677 |
if (!fse) {
|
3678 |
/* We don't have a fsdev identified by fsdev_id */
|
3679 |
fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
|
3680 |
"id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL"); |
3681 |
exit(1);
|
3682 |
} |
3683 |
|
3684 |
if (!fse->path || !conf->tag) {
|
3685 |
/* we haven't specified a mount_tag or the path */
|
3686 |
fprintf(stderr, "fsdev with id %s needs path "
|
3687 |
"and Virtio-9p device needs mount_tag arguments\n",
|
3688 |
conf->fsdev_id); |
3689 |
exit(1);
|
3690 |
} |
3691 |
|
3692 |
if (!strcmp(fse->security_model, "passthrough")) { |
3693 |
/* Files on the Fileserver set to client user credentials */
|
3694 |
s->ctx.fs_sm = SM_PASSTHROUGH; |
3695 |
s->ctx.xops = passthrough_xattr_ops; |
3696 |
} else if (!strcmp(fse->security_model, "mapped")) { |
3697 |
/* Files on the fileserver are set to QEMU credentials.
|
3698 |
* Client user credentials are saved in extended attributes.
|
3699 |
*/
|
3700 |
s->ctx.fs_sm = SM_MAPPED; |
3701 |
s->ctx.xops = mapped_xattr_ops; |
3702 |
} else if (!strcmp(fse->security_model, "none")) { |
3703 |
/*
|
3704 |
* Files on the fileserver are set to QEMU credentials.
|
3705 |
*/
|
3706 |
s->ctx.fs_sm = SM_NONE; |
3707 |
s->ctx.xops = none_xattr_ops; |
3708 |
} else {
|
3709 |
fprintf(stderr, "Default to security_model=none. You may want"
|
3710 |
" enable advanced security model using "
|
3711 |
"security option:\n\t security_model=passthrough \n\t "
|
3712 |
"security_model=mapped\n");
|
3713 |
s->ctx.fs_sm = SM_NONE; |
3714 |
s->ctx.xops = none_xattr_ops; |
3715 |
} |
3716 |
|
3717 |
if (lstat(fse->path, &stat)) {
|
3718 |
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
3719 |
exit(1);
|
3720 |
} else if (!S_ISDIR(stat.st_mode)) { |
3721 |
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
3722 |
exit(1);
|
3723 |
} |
3724 |
|
3725 |
s->ctx.fs_root = qemu_strdup(fse->path); |
3726 |
len = strlen(conf->tag); |
3727 |
if (len > MAX_TAG_LEN) {
|
3728 |
len = MAX_TAG_LEN; |
3729 |
} |
3730 |
/* s->tag is non-NULL terminated string */
|
3731 |
s->tag = qemu_malloc(len); |
3732 |
memcpy(s->tag, conf->tag, len); |
3733 |
s->tag_len = len; |
3734 |
s->ctx.uid = -1;
|
3735 |
|
3736 |
s->ops = fse->ops; |
3737 |
s->vdev.get_features = virtio_9p_get_features; |
3738 |
s->config_size = sizeof(struct virtio_9p_config) + |
3739 |
s->tag_len; |
3740 |
s->vdev.get_config = virtio_9p_get_config; |
3741 |
|
3742 |
return &s->vdev;
|
3743 |
} |