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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-pci.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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switch (mode & 3) { |
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case Oread:
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ret = O_RDONLY; |
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break;
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case Ordwr:
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ret = O_RDWR; |
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break;
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case Owrite:
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ret = O_WRONLY; |
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break;
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case Oexec:
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ret = O_RDONLY; |
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break;
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} |
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if (mode & Otrunc) {
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ret |= O_TRUNC; |
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} |
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if (mode & Oappend) {
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ret |= O_APPEND; |
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} |
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if (mode & Oexcl) {
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ret |= O_EXCL; |
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} |
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return ret;
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} |
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void cred_init(FsCred *credp)
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{ |
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credp->fc_uid = -1;
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credp->fc_gid = -1;
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credp->fc_mode = -1;
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credp->fc_rdev = -1;
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} |
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static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
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{ |
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return s->ops->lstat(&s->ctx, path->data, stbuf);
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} |
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static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
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{ |
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ssize_t len; |
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buf->data = qemu_malloc(1024);
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len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1); |
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if (len > -1) { |
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buf->size = len; |
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buf->data[len] = 0;
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} |
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return len;
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} |
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static int v9fs_do_close(V9fsState *s, int fd) |
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{ |
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return s->ops->close(&s->ctx, fd);
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} |
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static int v9fs_do_closedir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->closedir(&s->ctx, dir);
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} |
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static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
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{ |
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return s->ops->open(&s->ctx, path->data, flags);
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} |
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static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path)
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{ |
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return s->ops->opendir(&s->ctx, path->data);
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} |
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static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->rewinddir(&s->ctx, dir);
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} |
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static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
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{ |
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return s->ops->telldir(&s->ctx, dir);
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} |
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static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir) |
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{ |
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return s->ops->readdir(&s->ctx, dir);
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} |
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static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
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{ |
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return s->ops->seekdir(&s->ctx, dir, off);
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} |
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static int v9fs_do_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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} |
150 |
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static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
152 |
{ |
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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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} |
158 |
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static int v9fs_do_mknod(V9fsState *s, char *name, |
160 |
mode_t mode, dev_t dev, uid_t uid, gid_t gid) |
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{ |
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FsCred cred; |
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cred_init(&cred); |
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cred.fc_uid = uid; |
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cred.fc_gid = gid; |
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cred.fc_mode = mode; |
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cred.fc_rdev = dev; |
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return s->ops->mknod(&s->ctx, name, &cred);
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} |
170 |
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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; |
175 |
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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; |
180 |
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return s->ops->mkdir(&s->ctx, name, &cred);
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} |
183 |
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static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) |
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{ |
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return s->ops->fstat(&s->ctx, fd, stbuf);
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} |
188 |
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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) |
191 |
{ |
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FsCred cred; |
193 |
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cred_init(&cred); |
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cred.fc_uid = uid; |
196 |
cred.fc_gid = gid; |
197 |
cred.fc_mode = mode & 07777;
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flags = flags; |
199 |
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return s->ops->open2(&s->ctx, fullname, flags, &cred);
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} |
202 |
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static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp, |
204 |
const char *oldpath, const char *newpath, gid_t gid) |
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{ |
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FsCred cred; |
207 |
cred_init(&cred); |
208 |
cred.fc_uid = fidp->uid; |
209 |
cred.fc_gid = gid; |
210 |
cred.fc_mode = 0777;
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211 |
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return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
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} |
214 |
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215 |
static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) |
216 |
{ |
217 |
return s->ops->link(&s->ctx, oldpath->data, newpath->data);
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} |
219 |
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static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
221 |
{ |
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return s->ops->truncate(&s->ctx, path->data, size);
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} |
224 |
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225 |
static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, |
226 |
V9fsString *newpath) |
227 |
{ |
228 |
return s->ops->rename(&s->ctx, oldpath->data, newpath->data);
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} |
230 |
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static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) |
232 |
{ |
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FsCred cred; |
234 |
cred_init(&cred); |
235 |
cred.fc_uid = uid; |
236 |
cred.fc_gid = gid; |
237 |
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return s->ops->chown(&s->ctx, path->data, &cred);
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} |
240 |
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static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
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const struct timespec times[2]) |
243 |
{ |
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return s->ops->utimensat(&s->ctx, path->data, times);
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} |
246 |
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247 |
static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
248 |
{ |
249 |
return s->ops->remove(&s->ctx, path->data);
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} |
251 |
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static int v9fs_do_fsync(V9fsState *s, int fd, int datasync) |
253 |
{ |
254 |
return s->ops->fsync(&s->ctx, fd, datasync);
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} |
256 |
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257 |
static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
258 |
{ |
259 |
return s->ops->statfs(&s->ctx, path->data, stbuf);
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} |
261 |
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262 |
static ssize_t v9fs_do_lgetxattr(V9fsState *s, V9fsString *path,
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V9fsString *xattr_name, |
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void *value, size_t size)
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{ |
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return s->ops->lgetxattr(&s->ctx, path->data,
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xattr_name->data, value, size); |
268 |
} |
269 |
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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); |
275 |
} |
276 |
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277 |
static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path, |
278 |
V9fsString *xattr_name, |
279 |
void *value, size_t size, int flags) |
280 |
{ |
281 |
return s->ops->lsetxattr(&s->ctx, path->data,
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xattr_name->data, value, size, flags); |
283 |
} |
284 |
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285 |
static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path, |
286 |
V9fsString *xattr_name) |
287 |
{ |
288 |
return s->ops->lremovexattr(&s->ctx, path->data,
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xattr_name->data); |
290 |
} |
291 |
|
292 |
|
293 |
static void v9fs_string_init(V9fsString *str) |
294 |
{ |
295 |
str->data = NULL;
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296 |
str->size = 0;
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297 |
} |
298 |
|
299 |
static void v9fs_string_free(V9fsString *str) |
300 |
{ |
301 |
qemu_free(str->data); |
302 |
str->data = NULL;
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303 |
str->size = 0;
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304 |
} |
305 |
|
306 |
static void v9fs_string_null(V9fsString *str) |
307 |
{ |
308 |
v9fs_string_free(str); |
309 |
} |
310 |
|
311 |
static int number_to_string(void *arg, char type) |
312 |
{ |
313 |
unsigned int ret = 0; |
314 |
|
315 |
switch (type) {
|
316 |
case 'u': { |
317 |
unsigned int num = *(unsigned int *)arg; |
318 |
|
319 |
do {
|
320 |
ret++; |
321 |
num = num/10;
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322 |
} while (num);
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323 |
break;
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324 |
} |
325 |
case 'U': { |
326 |
unsigned long num = *(unsigned long *)arg; |
327 |
do {
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328 |
ret++; |
329 |
num = num/10;
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330 |
} while (num);
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331 |
break;
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332 |
} |
333 |
default:
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334 |
printf("Number_to_string: Unknown number format\n");
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335 |
return -1; |
336 |
} |
337 |
|
338 |
return ret;
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339 |
} |
340 |
|
341 |
static int GCC_FMT_ATTR(2, 0) |
342 |
v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) |
343 |
{ |
344 |
va_list ap2; |
345 |
char *iter = (char *)fmt; |
346 |
int len = 0; |
347 |
int nr_args = 0; |
348 |
char *arg_char_ptr;
|
349 |
unsigned int arg_uint; |
350 |
unsigned long arg_ulong; |
351 |
|
352 |
/* Find the number of %'s that denotes an argument */
|
353 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
354 |
nr_args++; |
355 |
iter++; |
356 |
} |
357 |
|
358 |
len = strlen(fmt) - 2*nr_args;
|
359 |
|
360 |
if (!nr_args) {
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361 |
goto alloc_print;
|
362 |
} |
363 |
|
364 |
va_copy(ap2, ap); |
365 |
|
366 |
iter = (char *)fmt;
|
367 |
|
368 |
/* Now parse the format string */
|
369 |
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
370 |
iter++; |
371 |
switch (*iter) {
|
372 |
case 'u': |
373 |
arg_uint = va_arg(ap2, unsigned int); |
374 |
len += number_to_string((void *)&arg_uint, 'u'); |
375 |
break;
|
376 |
case 'l': |
377 |
if (*++iter == 'u') { |
378 |
arg_ulong = va_arg(ap2, unsigned long); |
379 |
len += number_to_string((void *)&arg_ulong, 'U'); |
380 |
} else {
|
381 |
return -1; |
382 |
} |
383 |
break;
|
384 |
case 's': |
385 |
arg_char_ptr = va_arg(ap2, char *);
|
386 |
len += strlen(arg_char_ptr); |
387 |
break;
|
388 |
case 'c': |
389 |
len += 1;
|
390 |
break;
|
391 |
default:
|
392 |
fprintf(stderr, |
393 |
"v9fs_string_alloc_printf:Incorrect format %c", *iter);
|
394 |
return -1; |
395 |
} |
396 |
iter++; |
397 |
} |
398 |
|
399 |
alloc_print:
|
400 |
*strp = qemu_malloc((len + 1) * sizeof(**strp)); |
401 |
|
402 |
return vsprintf(*strp, fmt, ap);
|
403 |
} |
404 |
|
405 |
static void GCC_FMT_ATTR(2, 3) |
406 |
v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
407 |
{ |
408 |
va_list ap; |
409 |
int err;
|
410 |
|
411 |
v9fs_string_free(str); |
412 |
|
413 |
va_start(ap, fmt); |
414 |
err = v9fs_string_alloc_printf(&str->data, fmt, ap); |
415 |
BUG_ON(err == -1);
|
416 |
va_end(ap); |
417 |
|
418 |
str->size = err; |
419 |
} |
420 |
|
421 |
static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
422 |
{ |
423 |
v9fs_string_free(lhs); |
424 |
v9fs_string_sprintf(lhs, "%s", rhs->data);
|
425 |
} |
426 |
|
427 |
/*
|
428 |
* Return TRUE if s1 is an ancestor of s2.
|
429 |
*
|
430 |
* E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d".
|
431 |
* As a special case, We treat s1 as ancestor of s2 if they are same!
|
432 |
*/
|
433 |
static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2) |
434 |
{ |
435 |
if (!strncmp(s1->data, s2->data, s1->size)) {
|
436 |
if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') { |
437 |
return 1; |
438 |
} |
439 |
} |
440 |
return 0; |
441 |
} |
442 |
|
443 |
static size_t v9fs_string_size(V9fsString *str)
|
444 |
{ |
445 |
return str->size;
|
446 |
} |
447 |
|
448 |
static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
|
449 |
{ |
450 |
V9fsFidState *f; |
451 |
|
452 |
for (f = s->fid_list; f; f = f->next) {
|
453 |
if (f->fid == fid) {
|
454 |
return f;
|
455 |
} |
456 |
} |
457 |
|
458 |
return NULL; |
459 |
} |
460 |
|
461 |
static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
462 |
{ |
463 |
V9fsFidState *f; |
464 |
|
465 |
f = lookup_fid(s, fid); |
466 |
if (f) {
|
467 |
return NULL; |
468 |
} |
469 |
|
470 |
f = qemu_mallocz(sizeof(V9fsFidState));
|
471 |
|
472 |
f->fid = fid; |
473 |
f->fid_type = P9_FID_NONE; |
474 |
|
475 |
f->next = s->fid_list; |
476 |
s->fid_list = f; |
477 |
|
478 |
return f;
|
479 |
} |
480 |
|
481 |
static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
482 |
{ |
483 |
int retval = 0; |
484 |
|
485 |
if (fidp->fs.xattr.copied_len == -1) { |
486 |
/* getxattr/listxattr fid */
|
487 |
goto free_value;
|
488 |
} |
489 |
/*
|
490 |
* if this is fid for setxattr. clunk should
|
491 |
* result in setxattr localcall
|
492 |
*/
|
493 |
if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
|
494 |
/* clunk after partial write */
|
495 |
retval = -EINVAL; |
496 |
goto free_out;
|
497 |
} |
498 |
if (fidp->fs.xattr.len) {
|
499 |
retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, |
500 |
fidp->fs.xattr.value, |
501 |
fidp->fs.xattr.len, |
502 |
fidp->fs.xattr.flags); |
503 |
} else {
|
504 |
retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); |
505 |
} |
506 |
free_out:
|
507 |
v9fs_string_free(&fidp->fs.xattr.name); |
508 |
free_value:
|
509 |
if (fidp->fs.xattr.value) {
|
510 |
qemu_free(fidp->fs.xattr.value); |
511 |
} |
512 |
return retval;
|
513 |
} |
514 |
|
515 |
static int free_fid(V9fsState *s, int32_t fid) |
516 |
{ |
517 |
int retval = 0; |
518 |
V9fsFidState **fidpp, *fidp; |
519 |
|
520 |
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
521 |
if ((*fidpp)->fid == fid) {
|
522 |
break;
|
523 |
} |
524 |
} |
525 |
|
526 |
if (*fidpp == NULL) { |
527 |
return -ENOENT;
|
528 |
} |
529 |
|
530 |
fidp = *fidpp; |
531 |
*fidpp = fidp->next; |
532 |
|
533 |
if (fidp->fid_type == P9_FID_FILE) {
|
534 |
v9fs_do_close(s, fidp->fs.fd); |
535 |
} else if (fidp->fid_type == P9_FID_DIR) { |
536 |
v9fs_do_closedir(s, fidp->fs.dir); |
537 |
} else if (fidp->fid_type == P9_FID_XATTR) { |
538 |
retval = v9fs_xattr_fid_clunk(s, fidp); |
539 |
} |
540 |
v9fs_string_free(&fidp->path); |
541 |
qemu_free(fidp); |
542 |
|
543 |
return retval;
|
544 |
} |
545 |
|
546 |
#define P9_QID_TYPE_DIR 0x80 |
547 |
#define P9_QID_TYPE_SYMLINK 0x02 |
548 |
|
549 |
#define P9_STAT_MODE_DIR 0x80000000 |
550 |
#define P9_STAT_MODE_APPEND 0x40000000 |
551 |
#define P9_STAT_MODE_EXCL 0x20000000 |
552 |
#define P9_STAT_MODE_MOUNT 0x10000000 |
553 |
#define P9_STAT_MODE_AUTH 0x08000000 |
554 |
#define P9_STAT_MODE_TMP 0x04000000 |
555 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
556 |
#define P9_STAT_MODE_LINK 0x01000000 |
557 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
558 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
559 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
560 |
#define P9_STAT_MODE_SETUID 0x00080000 |
561 |
#define P9_STAT_MODE_SETGID 0x00040000 |
562 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
563 |
|
564 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
565 |
P9_STAT_MODE_SYMLINK | \ |
566 |
P9_STAT_MODE_LINK | \ |
567 |
P9_STAT_MODE_DEVICE | \ |
568 |
P9_STAT_MODE_NAMED_PIPE | \ |
569 |
P9_STAT_MODE_SOCKET) |
570 |
|
571 |
/* This is the algorithm from ufs in spfs */
|
572 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
573 |
{ |
574 |
size_t size; |
575 |
|
576 |
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
577 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
578 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
579 |
qidp->type = 0;
|
580 |
if (S_ISDIR(stbuf->st_mode)) {
|
581 |
qidp->type |= P9_QID_TYPE_DIR; |
582 |
} |
583 |
if (S_ISLNK(stbuf->st_mode)) {
|
584 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
585 |
} |
586 |
} |
587 |
|
588 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
589 |
{ |
590 |
struct stat stbuf;
|
591 |
int err;
|
592 |
|
593 |
err = v9fs_do_lstat(s, &fidp->path, &stbuf); |
594 |
if (err) {
|
595 |
return err;
|
596 |
} |
597 |
|
598 |
stat_to_qid(&stbuf, qidp); |
599 |
return 0; |
600 |
} |
601 |
|
602 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
603 |
{ |
604 |
V9fsPDU *pdu = NULL;
|
605 |
|
606 |
if (!QLIST_EMPTY(&s->free_list)) {
|
607 |
pdu = QLIST_FIRST(&s->free_list); |
608 |
QLIST_REMOVE(pdu, next); |
609 |
} |
610 |
return pdu;
|
611 |
} |
612 |
|
613 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
614 |
{ |
615 |
if (pdu) {
|
616 |
if (debug_9p_pdu) {
|
617 |
pprint_pdu(pdu); |
618 |
} |
619 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
620 |
} |
621 |
} |
622 |
|
623 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
624 |
size_t offset, size_t size, int pack)
|
625 |
{ |
626 |
int i = 0; |
627 |
size_t copied = 0;
|
628 |
|
629 |
for (i = 0; size && i < sg_count; i++) { |
630 |
size_t len; |
631 |
if (offset >= sg[i].iov_len) {
|
632 |
/* skip this sg */
|
633 |
offset -= sg[i].iov_len; |
634 |
continue;
|
635 |
} else {
|
636 |
len = MIN(sg[i].iov_len - offset, size); |
637 |
if (pack) {
|
638 |
memcpy(sg[i].iov_base + offset, addr, len); |
639 |
} else {
|
640 |
memcpy(addr, sg[i].iov_base + offset, len); |
641 |
} |
642 |
size -= len; |
643 |
copied += len; |
644 |
addr += len; |
645 |
if (size) {
|
646 |
offset = 0;
|
647 |
continue;
|
648 |
} |
649 |
} |
650 |
} |
651 |
|
652 |
return copied;
|
653 |
} |
654 |
|
655 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
656 |
{ |
657 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
658 |
offset, size, 0);
|
659 |
} |
660 |
|
661 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
662 |
size_t size) |
663 |
{ |
664 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
665 |
offset, size, 1);
|
666 |
} |
667 |
|
668 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
669 |
{ |
670 |
size_t pos = 0;
|
671 |
int i, j;
|
672 |
struct iovec *src_sg;
|
673 |
unsigned int num; |
674 |
|
675 |
if (rx) {
|
676 |
src_sg = pdu->elem.in_sg; |
677 |
num = pdu->elem.in_num; |
678 |
} else {
|
679 |
src_sg = pdu->elem.out_sg; |
680 |
num = pdu->elem.out_num; |
681 |
} |
682 |
|
683 |
j = 0;
|
684 |
for (i = 0; i < num; i++) { |
685 |
if (offset <= pos) {
|
686 |
sg[j].iov_base = src_sg[i].iov_base; |
687 |
sg[j].iov_len = src_sg[i].iov_len; |
688 |
j++; |
689 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
690 |
sg[j].iov_base = src_sg[i].iov_base; |
691 |
sg[j].iov_len = src_sg[i].iov_len; |
692 |
sg[j].iov_base += (offset - pos); |
693 |
sg[j].iov_len -= (offset - pos); |
694 |
j++; |
695 |
} |
696 |
pos += src_sg[i].iov_len; |
697 |
} |
698 |
|
699 |
return j;
|
700 |
} |
701 |
|
702 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
703 |
{ |
704 |
size_t old_offset = offset; |
705 |
va_list ap; |
706 |
int i;
|
707 |
|
708 |
va_start(ap, fmt); |
709 |
for (i = 0; fmt[i]; i++) { |
710 |
switch (fmt[i]) {
|
711 |
case 'b': { |
712 |
uint8_t *valp = va_arg(ap, uint8_t *); |
713 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
714 |
break;
|
715 |
} |
716 |
case 'w': { |
717 |
uint16_t val, *valp; |
718 |
valp = va_arg(ap, uint16_t *); |
719 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
720 |
*valp = le16_to_cpu(val); |
721 |
break;
|
722 |
} |
723 |
case 'd': { |
724 |
uint32_t val, *valp; |
725 |
valp = va_arg(ap, uint32_t *); |
726 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
727 |
*valp = le32_to_cpu(val); |
728 |
break;
|
729 |
} |
730 |
case 'q': { |
731 |
uint64_t val, *valp; |
732 |
valp = va_arg(ap, uint64_t *); |
733 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
734 |
*valp = le64_to_cpu(val); |
735 |
break;
|
736 |
} |
737 |
case 'v': { |
738 |
struct iovec *iov = va_arg(ap, struct iovec *); |
739 |
int *iovcnt = va_arg(ap, int *); |
740 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
741 |
break;
|
742 |
} |
743 |
case 's': { |
744 |
V9fsString *str = va_arg(ap, V9fsString *); |
745 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
746 |
/* FIXME: sanity check str->size */
|
747 |
str->data = qemu_malloc(str->size + 1);
|
748 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
749 |
str->data[str->size] = 0;
|
750 |
break;
|
751 |
} |
752 |
case 'Q': { |
753 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
754 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
755 |
&qidp->type, &qidp->version, &qidp->path); |
756 |
break;
|
757 |
} |
758 |
case 'S': { |
759 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
760 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
761 |
&statp->size, &statp->type, &statp->dev, |
762 |
&statp->qid, &statp->mode, &statp->atime, |
763 |
&statp->mtime, &statp->length, |
764 |
&statp->name, &statp->uid, &statp->gid, |
765 |
&statp->muid, &statp->extension, |
766 |
&statp->n_uid, &statp->n_gid, |
767 |
&statp->n_muid); |
768 |
break;
|
769 |
} |
770 |
case 'I': { |
771 |
V9fsIattr *iattr = va_arg(ap, V9fsIattr *); |
772 |
offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
|
773 |
&iattr->valid, &iattr->mode, |
774 |
&iattr->uid, &iattr->gid, &iattr->size, |
775 |
&iattr->atime_sec, &iattr->atime_nsec, |
776 |
&iattr->mtime_sec, &iattr->mtime_nsec); |
777 |
break;
|
778 |
} |
779 |
default:
|
780 |
break;
|
781 |
} |
782 |
} |
783 |
|
784 |
va_end(ap); |
785 |
|
786 |
return offset - old_offset;
|
787 |
} |
788 |
|
789 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
790 |
{ |
791 |
size_t old_offset = offset; |
792 |
va_list ap; |
793 |
int i;
|
794 |
|
795 |
va_start(ap, fmt); |
796 |
for (i = 0; fmt[i]; i++) { |
797 |
switch (fmt[i]) {
|
798 |
case 'b': { |
799 |
uint8_t val = va_arg(ap, int);
|
800 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
801 |
break;
|
802 |
} |
803 |
case 'w': { |
804 |
uint16_t val; |
805 |
cpu_to_le16w(&val, va_arg(ap, int));
|
806 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
807 |
break;
|
808 |
} |
809 |
case 'd': { |
810 |
uint32_t val; |
811 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
812 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
813 |
break;
|
814 |
} |
815 |
case 'q': { |
816 |
uint64_t val; |
817 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
818 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
819 |
break;
|
820 |
} |
821 |
case 'v': { |
822 |
struct iovec *iov = va_arg(ap, struct iovec *); |
823 |
int *iovcnt = va_arg(ap, int *); |
824 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
825 |
break;
|
826 |
} |
827 |
case 's': { |
828 |
V9fsString *str = va_arg(ap, V9fsString *); |
829 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
830 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
831 |
break;
|
832 |
} |
833 |
case 'Q': { |
834 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
835 |
offset += pdu_marshal(pdu, offset, "bdq",
|
836 |
qidp->type, qidp->version, qidp->path); |
837 |
break;
|
838 |
} |
839 |
case 'S': { |
840 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
841 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
842 |
statp->size, statp->type, statp->dev, |
843 |
&statp->qid, statp->mode, statp->atime, |
844 |
statp->mtime, statp->length, &statp->name, |
845 |
&statp->uid, &statp->gid, &statp->muid, |
846 |
&statp->extension, statp->n_uid, |
847 |
statp->n_gid, statp->n_muid); |
848 |
break;
|
849 |
} |
850 |
case 'A': { |
851 |
V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); |
852 |
offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
|
853 |
statp->st_result_mask, |
854 |
&statp->qid, statp->st_mode, |
855 |
statp->st_uid, statp->st_gid, |
856 |
statp->st_nlink, statp->st_rdev, |
857 |
statp->st_size, statp->st_blksize, statp->st_blocks, |
858 |
statp->st_atime_sec, statp->st_atime_nsec, |
859 |
statp->st_mtime_sec, statp->st_mtime_nsec, |
860 |
statp->st_ctime_sec, statp->st_ctime_nsec, |
861 |
statp->st_btime_sec, statp->st_btime_nsec, |
862 |
statp->st_gen, statp->st_data_version); |
863 |
break;
|
864 |
} |
865 |
default:
|
866 |
break;
|
867 |
} |
868 |
} |
869 |
va_end(ap); |
870 |
|
871 |
return offset - old_offset;
|
872 |
} |
873 |
|
874 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
875 |
{ |
876 |
int8_t id = pdu->id + 1; /* Response */ |
877 |
|
878 |
if (len < 0) { |
879 |
int err = -len;
|
880 |
len = 7;
|
881 |
|
882 |
if (s->proto_version != V9FS_PROTO_2000L) {
|
883 |
V9fsString str; |
884 |
|
885 |
str.data = strerror(err); |
886 |
str.size = strlen(str.data); |
887 |
|
888 |
len += pdu_marshal(pdu, len, "s", &str);
|
889 |
id = P9_RERROR; |
890 |
} |
891 |
|
892 |
len += pdu_marshal(pdu, len, "d", err);
|
893 |
|
894 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
895 |
id = P9_RLERROR; |
896 |
} |
897 |
} |
898 |
|
899 |
/* fill out the header */
|
900 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
901 |
|
902 |
/* keep these in sync */
|
903 |
pdu->size = len; |
904 |
pdu->id = id; |
905 |
|
906 |
/* push onto queue and notify */
|
907 |
virtqueue_push(s->vq, &pdu->elem, len); |
908 |
|
909 |
/* FIXME: we should batch these completions */
|
910 |
virtio_notify(&s->vdev, s->vq); |
911 |
|
912 |
free_pdu(s, pdu); |
913 |
} |
914 |
|
915 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
916 |
{ |
917 |
mode_t ret; |
918 |
|
919 |
ret = mode & 0777;
|
920 |
if (mode & P9_STAT_MODE_DIR) {
|
921 |
ret |= S_IFDIR; |
922 |
} |
923 |
|
924 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
925 |
ret |= S_IFLNK; |
926 |
} |
927 |
if (mode & P9_STAT_MODE_SOCKET) {
|
928 |
ret |= S_IFSOCK; |
929 |
} |
930 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
931 |
ret |= S_IFIFO; |
932 |
} |
933 |
if (mode & P9_STAT_MODE_DEVICE) {
|
934 |
if (extension && extension->data[0] == 'c') { |
935 |
ret |= S_IFCHR; |
936 |
} else {
|
937 |
ret |= S_IFBLK; |
938 |
} |
939 |
} |
940 |
|
941 |
if (!(ret&~0777)) { |
942 |
ret |= S_IFREG; |
943 |
} |
944 |
|
945 |
if (mode & P9_STAT_MODE_SETUID) {
|
946 |
ret |= S_ISUID; |
947 |
} |
948 |
if (mode & P9_STAT_MODE_SETGID) {
|
949 |
ret |= S_ISGID; |
950 |
} |
951 |
if (mode & P9_STAT_MODE_SETVTX) {
|
952 |
ret |= S_ISVTX; |
953 |
} |
954 |
|
955 |
return ret;
|
956 |
} |
957 |
|
958 |
static int donttouch_stat(V9fsStat *stat) |
959 |
{ |
960 |
if (stat->type == -1 && |
961 |
stat->dev == -1 &&
|
962 |
stat->qid.type == -1 &&
|
963 |
stat->qid.version == -1 &&
|
964 |
stat->qid.path == -1 &&
|
965 |
stat->mode == -1 &&
|
966 |
stat->atime == -1 &&
|
967 |
stat->mtime == -1 &&
|
968 |
stat->length == -1 &&
|
969 |
!stat->name.size && |
970 |
!stat->uid.size && |
971 |
!stat->gid.size && |
972 |
!stat->muid.size && |
973 |
stat->n_uid == -1 &&
|
974 |
stat->n_gid == -1 &&
|
975 |
stat->n_muid == -1) {
|
976 |
return 1; |
977 |
} |
978 |
|
979 |
return 0; |
980 |
} |
981 |
|
982 |
static void v9fs_stat_free(V9fsStat *stat) |
983 |
{ |
984 |
v9fs_string_free(&stat->name); |
985 |
v9fs_string_free(&stat->uid); |
986 |
v9fs_string_free(&stat->gid); |
987 |
v9fs_string_free(&stat->muid); |
988 |
v9fs_string_free(&stat->extension); |
989 |
} |
990 |
|
991 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
992 |
{ |
993 |
uint32_t mode; |
994 |
|
995 |
mode = stbuf->st_mode & 0777;
|
996 |
if (S_ISDIR(stbuf->st_mode)) {
|
997 |
mode |= P9_STAT_MODE_DIR; |
998 |
} |
999 |
|
1000 |
if (S_ISLNK(stbuf->st_mode)) {
|
1001 |
mode |= P9_STAT_MODE_SYMLINK; |
1002 |
} |
1003 |
|
1004 |
if (S_ISSOCK(stbuf->st_mode)) {
|
1005 |
mode |= P9_STAT_MODE_SOCKET; |
1006 |
} |
1007 |
|
1008 |
if (S_ISFIFO(stbuf->st_mode)) {
|
1009 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
1010 |
} |
1011 |
|
1012 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
1013 |
mode |= P9_STAT_MODE_DEVICE; |
1014 |
} |
1015 |
|
1016 |
if (stbuf->st_mode & S_ISUID) {
|
1017 |
mode |= P9_STAT_MODE_SETUID; |
1018 |
} |
1019 |
|
1020 |
if (stbuf->st_mode & S_ISGID) {
|
1021 |
mode |= P9_STAT_MODE_SETGID; |
1022 |
} |
1023 |
|
1024 |
if (stbuf->st_mode & S_ISVTX) {
|
1025 |
mode |= P9_STAT_MODE_SETVTX; |
1026 |
} |
1027 |
|
1028 |
return mode;
|
1029 |
} |
1030 |
|
1031 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
1032 |
const struct stat *stbuf, |
1033 |
V9fsStat *v9stat) |
1034 |
{ |
1035 |
int err;
|
1036 |
const char *str; |
1037 |
|
1038 |
memset(v9stat, 0, sizeof(*v9stat)); |
1039 |
|
1040 |
stat_to_qid(stbuf, &v9stat->qid); |
1041 |
v9stat->mode = stat_to_v9mode(stbuf); |
1042 |
v9stat->atime = stbuf->st_atime; |
1043 |
v9stat->mtime = stbuf->st_mtime; |
1044 |
v9stat->length = stbuf->st_size; |
1045 |
|
1046 |
v9fs_string_null(&v9stat->uid); |
1047 |
v9fs_string_null(&v9stat->gid); |
1048 |
v9fs_string_null(&v9stat->muid); |
1049 |
|
1050 |
v9stat->n_uid = stbuf->st_uid; |
1051 |
v9stat->n_gid = stbuf->st_gid; |
1052 |
v9stat->n_muid = 0;
|
1053 |
|
1054 |
v9fs_string_null(&v9stat->extension); |
1055 |
|
1056 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
1057 |
err = v9fs_do_readlink(s, name, &v9stat->extension); |
1058 |
if (err == -1) { |
1059 |
err = -errno; |
1060 |
return err;
|
1061 |
} |
1062 |
v9stat->extension.data[err] = 0;
|
1063 |
v9stat->extension.size = err; |
1064 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1065 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
1066 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
1067 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
1068 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
1069 |
v9fs_string_sprintf(&v9stat->extension, "%s %lu",
|
1070 |
"HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); |
1071 |
} |
1072 |
|
1073 |
str = strrchr(name->data, '/');
|
1074 |
if (str) {
|
1075 |
str += 1;
|
1076 |
} else {
|
1077 |
str = name->data; |
1078 |
} |
1079 |
|
1080 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
1081 |
|
1082 |
v9stat->size = 61 +
|
1083 |
v9fs_string_size(&v9stat->name) + |
1084 |
v9fs_string_size(&v9stat->uid) + |
1085 |
v9fs_string_size(&v9stat->gid) + |
1086 |
v9fs_string_size(&v9stat->muid) + |
1087 |
v9fs_string_size(&v9stat->extension); |
1088 |
return 0; |
1089 |
} |
1090 |
|
1091 |
#define P9_STATS_MODE 0x00000001ULL |
1092 |
#define P9_STATS_NLINK 0x00000002ULL |
1093 |
#define P9_STATS_UID 0x00000004ULL |
1094 |
#define P9_STATS_GID 0x00000008ULL |
1095 |
#define P9_STATS_RDEV 0x00000010ULL |
1096 |
#define P9_STATS_ATIME 0x00000020ULL |
1097 |
#define P9_STATS_MTIME 0x00000040ULL |
1098 |
#define P9_STATS_CTIME 0x00000080ULL |
1099 |
#define P9_STATS_INO 0x00000100ULL |
1100 |
#define P9_STATS_SIZE 0x00000200ULL |
1101 |
#define P9_STATS_BLOCKS 0x00000400ULL |
1102 |
|
1103 |
#define P9_STATS_BTIME 0x00000800ULL |
1104 |
#define P9_STATS_GEN 0x00001000ULL |
1105 |
#define P9_STATS_DATA_VERSION 0x00002000ULL |
1106 |
|
1107 |
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ |
1108 |
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ |
1109 |
|
1110 |
|
1111 |
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, |
1112 |
V9fsStatDotl *v9lstat) |
1113 |
{ |
1114 |
memset(v9lstat, 0, sizeof(*v9lstat)); |
1115 |
|
1116 |
v9lstat->st_mode = stbuf->st_mode; |
1117 |
v9lstat->st_nlink = stbuf->st_nlink; |
1118 |
v9lstat->st_uid = stbuf->st_uid; |
1119 |
v9lstat->st_gid = stbuf->st_gid; |
1120 |
v9lstat->st_rdev = stbuf->st_rdev; |
1121 |
v9lstat->st_size = stbuf->st_size; |
1122 |
v9lstat->st_blksize = stbuf->st_blksize; |
1123 |
v9lstat->st_blocks = stbuf->st_blocks; |
1124 |
v9lstat->st_atime_sec = stbuf->st_atime; |
1125 |
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; |
1126 |
v9lstat->st_mtime_sec = stbuf->st_mtime; |
1127 |
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; |
1128 |
v9lstat->st_ctime_sec = stbuf->st_ctime; |
1129 |
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; |
1130 |
/* Currently we only support BASIC fields in stat */
|
1131 |
v9lstat->st_result_mask = P9_STATS_BASIC; |
1132 |
|
1133 |
stat_to_qid(stbuf, &v9lstat->qid); |
1134 |
} |
1135 |
|
1136 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1137 |
{ |
1138 |
while (len && *iovcnt) {
|
1139 |
if (len < sg->iov_len) {
|
1140 |
sg->iov_len -= len; |
1141 |
sg->iov_base += len; |
1142 |
len = 0;
|
1143 |
} else {
|
1144 |
len -= sg->iov_len; |
1145 |
sg++; |
1146 |
*iovcnt -= 1;
|
1147 |
} |
1148 |
} |
1149 |
|
1150 |
return sg;
|
1151 |
} |
1152 |
|
1153 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
1154 |
{ |
1155 |
int i;
|
1156 |
int total = 0; |
1157 |
|
1158 |
for (i = 0; i < *cnt; i++) { |
1159 |
if ((total + sg[i].iov_len) > cap) {
|
1160 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
1161 |
i++; |
1162 |
break;
|
1163 |
} |
1164 |
total += sg[i].iov_len; |
1165 |
} |
1166 |
|
1167 |
*cnt = i; |
1168 |
|
1169 |
return sg;
|
1170 |
} |
1171 |
|
1172 |
static void print_sg(struct iovec *sg, int cnt) |
1173 |
{ |
1174 |
int i;
|
1175 |
|
1176 |
printf("sg[%d]: {", cnt);
|
1177 |
for (i = 0; i < cnt; i++) { |
1178 |
if (i) {
|
1179 |
printf(", ");
|
1180 |
} |
1181 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
1182 |
} |
1183 |
printf("}\n");
|
1184 |
} |
1185 |
|
1186 |
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1187 |
{ |
1188 |
V9fsString str; |
1189 |
v9fs_string_init(&str); |
1190 |
v9fs_string_copy(&str, dst); |
1191 |
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
1192 |
v9fs_string_free(&str); |
1193 |
} |
1194 |
|
1195 |
static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
1196 |
{ |
1197 |
V9fsString version; |
1198 |
size_t offset = 7;
|
1199 |
|
1200 |
pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
1201 |
|
1202 |
if (!strcmp(version.data, "9P2000.u")) { |
1203 |
s->proto_version = V9FS_PROTO_2000U; |
1204 |
} else if (!strcmp(version.data, "9P2000.L")) { |
1205 |
s->proto_version = V9FS_PROTO_2000L; |
1206 |
} else {
|
1207 |
v9fs_string_sprintf(&version, "unknown");
|
1208 |
} |
1209 |
|
1210 |
offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
1211 |
complete_pdu(s, pdu, offset); |
1212 |
|
1213 |
v9fs_string_free(&version); |
1214 |
} |
1215 |
|
1216 |
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) |
1217 |
{ |
1218 |
int32_t fid, afid, n_uname; |
1219 |
V9fsString uname, aname; |
1220 |
V9fsFidState *fidp; |
1221 |
V9fsQID qid; |
1222 |
size_t offset = 7;
|
1223 |
ssize_t err; |
1224 |
|
1225 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
1226 |
|
1227 |
fidp = alloc_fid(s, fid); |
1228 |
if (fidp == NULL) { |
1229 |
err = -EINVAL; |
1230 |
goto out;
|
1231 |
} |
1232 |
|
1233 |
fidp->uid = n_uname; |
1234 |
|
1235 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
1236 |
err = fid_to_qid(s, fidp, &qid); |
1237 |
if (err) {
|
1238 |
err = -EINVAL; |
1239 |
free_fid(s, fid); |
1240 |
goto out;
|
1241 |
} |
1242 |
|
1243 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
1244 |
|
1245 |
err = offset; |
1246 |
out:
|
1247 |
complete_pdu(s, pdu, err); |
1248 |
v9fs_string_free(&uname); |
1249 |
v9fs_string_free(&aname); |
1250 |
} |
1251 |
|
1252 |
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1253 |
{ |
1254 |
if (err == -1) { |
1255 |
err = -errno; |
1256 |
goto out;
|
1257 |
} |
1258 |
|
1259 |
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); |
1260 |
if (err) {
|
1261 |
goto out;
|
1262 |
} |
1263 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); |
1264 |
err = vs->offset; |
1265 |
|
1266 |
out:
|
1267 |
complete_pdu(s, vs->pdu, err); |
1268 |
v9fs_stat_free(&vs->v9stat); |
1269 |
qemu_free(vs); |
1270 |
} |
1271 |
|
1272 |
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1273 |
{ |
1274 |
int32_t fid; |
1275 |
V9fsStatState *vs; |
1276 |
ssize_t err = 0;
|
1277 |
|
1278 |
vs = qemu_malloc(sizeof(*vs));
|
1279 |
vs->pdu = pdu; |
1280 |
vs->offset = 7;
|
1281 |
|
1282 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1283 |
|
1284 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
1285 |
|
1286 |
vs->fidp = lookup_fid(s, fid); |
1287 |
if (vs->fidp == NULL) { |
1288 |
err = -ENOENT; |
1289 |
goto out;
|
1290 |
} |
1291 |
|
1292 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1293 |
v9fs_stat_post_lstat(s, vs, err); |
1294 |
return;
|
1295 |
|
1296 |
out:
|
1297 |
complete_pdu(s, vs->pdu, err); |
1298 |
v9fs_stat_free(&vs->v9stat); |
1299 |
qemu_free(vs); |
1300 |
} |
1301 |
|
1302 |
static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs, |
1303 |
int err)
|
1304 |
{ |
1305 |
if (err == -1) { |
1306 |
err = -errno; |
1307 |
goto out;
|
1308 |
} |
1309 |
|
1310 |
stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl); |
1311 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
|
1312 |
err = vs->offset; |
1313 |
|
1314 |
out:
|
1315 |
complete_pdu(s, vs->pdu, err); |
1316 |
qemu_free(vs); |
1317 |
} |
1318 |
|
1319 |
static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu) |
1320 |
{ |
1321 |
int32_t fid; |
1322 |
V9fsStatStateDotl *vs; |
1323 |
ssize_t err = 0;
|
1324 |
V9fsFidState *fidp; |
1325 |
uint64_t request_mask; |
1326 |
|
1327 |
vs = qemu_malloc(sizeof(*vs));
|
1328 |
vs->pdu = pdu; |
1329 |
vs->offset = 7;
|
1330 |
|
1331 |
memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl)); |
1332 |
|
1333 |
pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
|
1334 |
|
1335 |
fidp = lookup_fid(s, fid); |
1336 |
if (fidp == NULL) { |
1337 |
err = -ENOENT; |
1338 |
goto out;
|
1339 |
} |
1340 |
|
1341 |
/* Currently we only support BASIC fields in stat, so there is no
|
1342 |
* need to look at request_mask.
|
1343 |
*/
|
1344 |
err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf); |
1345 |
v9fs_getattr_post_lstat(s, vs, err); |
1346 |
return;
|
1347 |
|
1348 |
out:
|
1349 |
complete_pdu(s, vs->pdu, err); |
1350 |
qemu_free(vs); |
1351 |
} |
1352 |
|
1353 |
/* From Linux kernel code */
|
1354 |
#define ATTR_MODE (1 << 0) |
1355 |
#define ATTR_UID (1 << 1) |
1356 |
#define ATTR_GID (1 << 2) |
1357 |
#define ATTR_SIZE (1 << 3) |
1358 |
#define ATTR_ATIME (1 << 4) |
1359 |
#define ATTR_MTIME (1 << 5) |
1360 |
#define ATTR_CTIME (1 << 6) |
1361 |
#define ATTR_MASK 127 |
1362 |
#define ATTR_ATIME_SET (1 << 7) |
1363 |
#define ATTR_MTIME_SET (1 << 8) |
1364 |
|
1365 |
static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs, |
1366 |
int err)
|
1367 |
{ |
1368 |
if (err == -1) { |
1369 |
err = -errno; |
1370 |
goto out;
|
1371 |
} |
1372 |
err = vs->offset; |
1373 |
|
1374 |
out:
|
1375 |
complete_pdu(s, vs->pdu, err); |
1376 |
qemu_free(vs); |
1377 |
} |
1378 |
|
1379 |
static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err) |
1380 |
{ |
1381 |
if (err == -1) { |
1382 |
err = -errno; |
1383 |
goto out;
|
1384 |
} |
1385 |
|
1386 |
if (vs->v9iattr.valid & (ATTR_SIZE)) {
|
1387 |
err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size); |
1388 |
} |
1389 |
v9fs_setattr_post_truncate(s, vs, err); |
1390 |
return;
|
1391 |
|
1392 |
out:
|
1393 |
complete_pdu(s, vs->pdu, err); |
1394 |
qemu_free(vs); |
1395 |
} |
1396 |
|
1397 |
static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs, |
1398 |
int err)
|
1399 |
{ |
1400 |
if (err == -1) { |
1401 |
err = -errno; |
1402 |
goto out;
|
1403 |
} |
1404 |
|
1405 |
/* If the only valid entry in iattr is ctime we can call
|
1406 |
* chown(-1,-1) to update the ctime of the file
|
1407 |
*/
|
1408 |
if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
|
1409 |
((vs->v9iattr.valid & ATTR_CTIME) |
1410 |
&& !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { |
1411 |
if (!(vs->v9iattr.valid & ATTR_UID)) {
|
1412 |
vs->v9iattr.uid = -1;
|
1413 |
} |
1414 |
if (!(vs->v9iattr.valid & ATTR_GID)) {
|
1415 |
vs->v9iattr.gid = -1;
|
1416 |
} |
1417 |
err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid, |
1418 |
vs->v9iattr.gid); |
1419 |
} |
1420 |
v9fs_setattr_post_chown(s, vs, err); |
1421 |
return;
|
1422 |
|
1423 |
out:
|
1424 |
complete_pdu(s, vs->pdu, err); |
1425 |
qemu_free(vs); |
1426 |
} |
1427 |
|
1428 |
static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err) |
1429 |
{ |
1430 |
if (err == -1) { |
1431 |
err = -errno; |
1432 |
goto out;
|
1433 |
} |
1434 |
|
1435 |
if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
|
1436 |
struct timespec times[2]; |
1437 |
if (vs->v9iattr.valid & ATTR_ATIME) {
|
1438 |
if (vs->v9iattr.valid & ATTR_ATIME_SET) {
|
1439 |
times[0].tv_sec = vs->v9iattr.atime_sec;
|
1440 |
times[0].tv_nsec = vs->v9iattr.atime_nsec;
|
1441 |
} else {
|
1442 |
times[0].tv_nsec = UTIME_NOW;
|
1443 |
} |
1444 |
} else {
|
1445 |
times[0].tv_nsec = UTIME_OMIT;
|
1446 |
} |
1447 |
|
1448 |
if (vs->v9iattr.valid & ATTR_MTIME) {
|
1449 |
if (vs->v9iattr.valid & ATTR_MTIME_SET) {
|
1450 |
times[1].tv_sec = vs->v9iattr.mtime_sec;
|
1451 |
times[1].tv_nsec = vs->v9iattr.mtime_nsec;
|
1452 |
} else {
|
1453 |
times[1].tv_nsec = UTIME_NOW;
|
1454 |
} |
1455 |
} else {
|
1456 |
times[1].tv_nsec = UTIME_OMIT;
|
1457 |
} |
1458 |
err = v9fs_do_utimensat(s, &vs->fidp->path, times); |
1459 |
} |
1460 |
v9fs_setattr_post_utimensat(s, vs, err); |
1461 |
return;
|
1462 |
|
1463 |
out:
|
1464 |
complete_pdu(s, vs->pdu, err); |
1465 |
qemu_free(vs); |
1466 |
} |
1467 |
|
1468 |
static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu) |
1469 |
{ |
1470 |
int32_t fid; |
1471 |
V9fsSetattrState *vs; |
1472 |
int err = 0; |
1473 |
|
1474 |
vs = qemu_malloc(sizeof(*vs));
|
1475 |
vs->pdu = pdu; |
1476 |
vs->offset = 7;
|
1477 |
|
1478 |
pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr);
|
1479 |
|
1480 |
vs->fidp = lookup_fid(s, fid); |
1481 |
if (vs->fidp == NULL) { |
1482 |
err = -EINVAL; |
1483 |
goto out;
|
1484 |
} |
1485 |
|
1486 |
if (vs->v9iattr.valid & ATTR_MODE) {
|
1487 |
err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode); |
1488 |
} |
1489 |
|
1490 |
v9fs_setattr_post_chmod(s, vs, err); |
1491 |
return;
|
1492 |
|
1493 |
out:
|
1494 |
complete_pdu(s, vs->pdu, err); |
1495 |
qemu_free(vs); |
1496 |
} |
1497 |
|
1498 |
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1499 |
{ |
1500 |
complete_pdu(s, vs->pdu, err); |
1501 |
|
1502 |
if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
|
1503 |
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1504 |
v9fs_string_free(&vs->wnames[vs->name_idx]); |
1505 |
} |
1506 |
|
1507 |
qemu_free(vs->wnames); |
1508 |
qemu_free(vs->qids); |
1509 |
} |
1510 |
} |
1511 |
|
1512 |
static void v9fs_walk_marshal(V9fsWalkState *vs) |
1513 |
{ |
1514 |
int i;
|
1515 |
vs->offset = 7;
|
1516 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
1517 |
|
1518 |
for (i = 0; i < vs->nwnames; i++) { |
1519 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
1520 |
} |
1521 |
} |
1522 |
|
1523 |
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1524 |
int err)
|
1525 |
{ |
1526 |
if (err == -1) { |
1527 |
free_fid(s, vs->newfidp->fid); |
1528 |
v9fs_string_free(&vs->path); |
1529 |
err = -ENOENT; |
1530 |
goto out;
|
1531 |
} |
1532 |
|
1533 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1534 |
|
1535 |
vs->name_idx++; |
1536 |
if (vs->name_idx < vs->nwnames) {
|
1537 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1538 |
vs->wnames[vs->name_idx].data); |
1539 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1540 |
|
1541 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1542 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1543 |
return;
|
1544 |
} |
1545 |
|
1546 |
v9fs_string_free(&vs->path); |
1547 |
v9fs_walk_marshal(vs); |
1548 |
err = vs->offset; |
1549 |
out:
|
1550 |
v9fs_walk_complete(s, vs, err); |
1551 |
} |
1552 |
|
1553 |
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, |
1554 |
int err)
|
1555 |
{ |
1556 |
if (err == -1) { |
1557 |
v9fs_string_free(&vs->path); |
1558 |
err = -ENOENT; |
1559 |
goto out;
|
1560 |
} |
1561 |
|
1562 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
1563 |
vs->name_idx++; |
1564 |
if (vs->name_idx < vs->nwnames) {
|
1565 |
|
1566 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1567 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1568 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1569 |
|
1570 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1571 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1572 |
return;
|
1573 |
} |
1574 |
|
1575 |
v9fs_string_free(&vs->path); |
1576 |
v9fs_walk_marshal(vs); |
1577 |
err = vs->offset; |
1578 |
out:
|
1579 |
v9fs_walk_complete(s, vs, err); |
1580 |
} |
1581 |
|
1582 |
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1583 |
{ |
1584 |
int32_t fid, newfid; |
1585 |
V9fsWalkState *vs; |
1586 |
int err = 0; |
1587 |
int i;
|
1588 |
|
1589 |
vs = qemu_malloc(sizeof(*vs));
|
1590 |
vs->pdu = pdu; |
1591 |
vs->wnames = NULL;
|
1592 |
vs->qids = NULL;
|
1593 |
vs->offset = 7;
|
1594 |
|
1595 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
1596 |
&newfid, &vs->nwnames); |
1597 |
|
1598 |
if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) {
|
1599 |
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
1600 |
|
1601 |
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); |
1602 |
|
1603 |
for (i = 0; i < vs->nwnames; i++) { |
1604 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
1605 |
&vs->wnames[i]); |
1606 |
} |
1607 |
} else if (vs->nwnames > P9_MAXWELEM) { |
1608 |
err = -EINVAL; |
1609 |
goto out;
|
1610 |
} |
1611 |
|
1612 |
vs->fidp = lookup_fid(s, fid); |
1613 |
if (vs->fidp == NULL) { |
1614 |
err = -ENOENT; |
1615 |
goto out;
|
1616 |
} |
1617 |
|
1618 |
/* FIXME: is this really valid? */
|
1619 |
if (fid == newfid) {
|
1620 |
|
1621 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
1622 |
v9fs_string_init(&vs->path); |
1623 |
vs->name_idx = 0;
|
1624 |
|
1625 |
if (vs->name_idx < vs->nwnames) {
|
1626 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
1627 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
1628 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
1629 |
|
1630 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1631 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
1632 |
return;
|
1633 |
} |
1634 |
} else {
|
1635 |
vs->newfidp = alloc_fid(s, newfid); |
1636 |
if (vs->newfidp == NULL) { |
1637 |
err = -EINVAL; |
1638 |
goto out;
|
1639 |
} |
1640 |
|
1641 |
vs->newfidp->uid = vs->fidp->uid; |
1642 |
v9fs_string_init(&vs->path); |
1643 |
vs->name_idx = 0;
|
1644 |
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); |
1645 |
|
1646 |
if (vs->name_idx < vs->nwnames) {
|
1647 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
1648 |
vs->wnames[vs->name_idx].data); |
1649 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
1650 |
|
1651 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
1652 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
1653 |
return;
|
1654 |
} |
1655 |
} |
1656 |
|
1657 |
v9fs_walk_marshal(vs); |
1658 |
err = vs->offset; |
1659 |
out:
|
1660 |
v9fs_walk_complete(s, vs, err); |
1661 |
} |
1662 |
|
1663 |
static int32_t get_iounit(V9fsState *s, V9fsString *name)
|
1664 |
{ |
1665 |
struct statfs stbuf;
|
1666 |
int32_t iounit = 0;
|
1667 |
|
1668 |
/*
|
1669 |
* iounit should be multiples of f_bsize (host filesystem block size
|
1670 |
* and as well as less than (client msize - P9_IOHDRSZ))
|
1671 |
*/
|
1672 |
if (!v9fs_do_statfs(s, name, &stbuf)) {
|
1673 |
iounit = stbuf.f_bsize; |
1674 |
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; |
1675 |
} |
1676 |
|
1677 |
if (!iounit) {
|
1678 |
iounit = s->msize - P9_IOHDRSZ; |
1679 |
} |
1680 |
return iounit;
|
1681 |
} |
1682 |
|
1683 |
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1684 |
{ |
1685 |
if (vs->fidp->fs.dir == NULL) { |
1686 |
err = -errno; |
1687 |
goto out;
|
1688 |
} |
1689 |
vs->fidp->fid_type = P9_FID_DIR; |
1690 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1691 |
err = vs->offset; |
1692 |
out:
|
1693 |
complete_pdu(s, vs->pdu, err); |
1694 |
qemu_free(vs); |
1695 |
|
1696 |
} |
1697 |
|
1698 |
static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1699 |
{ |
1700 |
int err;
|
1701 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
1702 |
err = vs->offset; |
1703 |
complete_pdu(s, vs->pdu, err); |
1704 |
qemu_free(vs); |
1705 |
} |
1706 |
|
1707 |
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1708 |
{ |
1709 |
if (vs->fidp->fs.fd == -1) { |
1710 |
err = -errno; |
1711 |
goto out;
|
1712 |
} |
1713 |
vs->fidp->fid_type = P9_FID_FILE; |
1714 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
1715 |
v9fs_open_post_getiounit(s, vs); |
1716 |
return;
|
1717 |
out:
|
1718 |
complete_pdu(s, vs->pdu, err); |
1719 |
qemu_free(vs); |
1720 |
} |
1721 |
|
1722 |
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) |
1723 |
{ |
1724 |
int flags;
|
1725 |
|
1726 |
if (err) {
|
1727 |
err = -errno; |
1728 |
goto out;
|
1729 |
} |
1730 |
|
1731 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1732 |
|
1733 |
if (S_ISDIR(vs->stbuf.st_mode)) {
|
1734 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path); |
1735 |
v9fs_open_post_opendir(s, vs, err); |
1736 |
} else {
|
1737 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1738 |
flags = vs->mode; |
1739 |
flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
1740 |
/* Ignore direct disk access hint until the server supports it. */
|
1741 |
flags &= ~O_DIRECT; |
1742 |
} else {
|
1743 |
flags = omode_to_uflags(vs->mode); |
1744 |
} |
1745 |
vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags); |
1746 |
v9fs_open_post_open(s, vs, err); |
1747 |
} |
1748 |
return;
|
1749 |
out:
|
1750 |
complete_pdu(s, vs->pdu, err); |
1751 |
qemu_free(vs); |
1752 |
} |
1753 |
|
1754 |
static void v9fs_open(V9fsState *s, V9fsPDU *pdu) |
1755 |
{ |
1756 |
int32_t fid; |
1757 |
V9fsOpenState *vs; |
1758 |
ssize_t err = 0;
|
1759 |
|
1760 |
vs = qemu_malloc(sizeof(*vs));
|
1761 |
vs->pdu = pdu; |
1762 |
vs->offset = 7;
|
1763 |
vs->mode = 0;
|
1764 |
|
1765 |
if (s->proto_version == V9FS_PROTO_2000L) {
|
1766 |
pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode);
|
1767 |
} else {
|
1768 |
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
1769 |
} |
1770 |
|
1771 |
vs->fidp = lookup_fid(s, fid); |
1772 |
if (vs->fidp == NULL) { |
1773 |
err = -ENOENT; |
1774 |
goto out;
|
1775 |
} |
1776 |
|
1777 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
1778 |
|
1779 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
1780 |
|
1781 |
v9fs_open_post_lstat(s, vs, err); |
1782 |
return;
|
1783 |
out:
|
1784 |
complete_pdu(s, pdu, err); |
1785 |
qemu_free(vs); |
1786 |
} |
1787 |
|
1788 |
static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
1789 |
{ |
1790 |
if (err == 0) { |
1791 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
1792 |
stat_to_qid(&vs->stbuf, &vs->qid); |
1793 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
|
1794 |
vs->iounit); |
1795 |
err = vs->offset; |
1796 |
} else {
|
1797 |
vs->fidp->fid_type = P9_FID_NONE; |
1798 |
err = -errno; |
1799 |
if (vs->fidp->fs.fd > 0) { |
1800 |
close(vs->fidp->fs.fd); |
1801 |
} |
1802 |
} |
1803 |
|
1804 |
complete_pdu(s, vs->pdu, err); |
1805 |
v9fs_string_free(&vs->name); |
1806 |
v9fs_string_free(&vs->fullname); |
1807 |
qemu_free(vs); |
1808 |
} |
1809 |
|
1810 |
static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, |
1811 |
int err)
|
1812 |
{ |
1813 |
if (err) {
|
1814 |
err = -errno; |
1815 |
goto out;
|
1816 |
} |
1817 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
1818 |
|
1819 |
out:
|
1820 |
v9fs_post_lcreate(s, vs, err); |
1821 |
} |
1822 |
|
1823 |
static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, |
1824 |
int err)
|
1825 |
{ |
1826 |
if (vs->fidp->fs.fd == -1) { |
1827 |
err = -errno; |
1828 |
goto out;
|
1829 |
} |
1830 |
vs->fidp->fid_type = P9_FID_FILE; |
1831 |
vs->iounit = get_iounit(s, &vs->fullname); |
1832 |
v9fs_lcreate_post_get_iounit(s, vs, err); |
1833 |
return;
|
1834 |
|
1835 |
out:
|
1836 |
v9fs_post_lcreate(s, vs, err); |
1837 |
} |
1838 |
|
1839 |
static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu) |
1840 |
{ |
1841 |
int32_t dfid, flags, mode; |
1842 |
gid_t gid; |
1843 |
V9fsLcreateState *vs; |
1844 |
ssize_t err = 0;
|
1845 |
|
1846 |
vs = qemu_malloc(sizeof(*vs));
|
1847 |
vs->pdu = pdu; |
1848 |
vs->offset = 7;
|
1849 |
|
1850 |
v9fs_string_init(&vs->fullname); |
1851 |
|
1852 |
pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
|
1853 |
&mode, &gid); |
1854 |
|
1855 |
vs->fidp = lookup_fid(s, dfid); |
1856 |
if (vs->fidp == NULL) { |
1857 |
err = -ENOENT; |
1858 |
goto out;
|
1859 |
} |
1860 |
|
1861 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
1862 |
vs->name.data); |
1863 |
|
1864 |
/* Ignore direct disk access hint until the server supports it. */
|
1865 |
flags &= ~O_DIRECT; |
1866 |
|
1867 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
1868 |
gid, flags, mode); |
1869 |
v9fs_lcreate_post_do_open2(s, vs, err); |
1870 |
return;
|
1871 |
|
1872 |
out:
|
1873 |
complete_pdu(s, vs->pdu, err); |
1874 |
v9fs_string_free(&vs->name); |
1875 |
qemu_free(vs); |
1876 |
} |
1877 |
|
1878 |
static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err) |
1879 |
{ |
1880 |
if (err == -1) { |
1881 |
err = -errno; |
1882 |
} |
1883 |
complete_pdu(s, pdu, err); |
1884 |
} |
1885 |
|
1886 |
static void v9fs_fsync(V9fsState *s, V9fsPDU *pdu) |
1887 |
{ |
1888 |
int32_t fid; |
1889 |
size_t offset = 7;
|
1890 |
V9fsFidState *fidp; |
1891 |
int datasync;
|
1892 |
int err;
|
1893 |
|
1894 |
pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
|
1895 |
fidp = lookup_fid(s, fid); |
1896 |
if (fidp == NULL) { |
1897 |
err = -ENOENT; |
1898 |
v9fs_post_do_fsync(s, pdu, err); |
1899 |
return;
|
1900 |
} |
1901 |
err = v9fs_do_fsync(s, fidp->fs.fd, datasync); |
1902 |
v9fs_post_do_fsync(s, pdu, err); |
1903 |
} |
1904 |
|
1905 |
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
1906 |
{ |
1907 |
int32_t fid; |
1908 |
size_t offset = 7;
|
1909 |
int err;
|
1910 |
|
1911 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
1912 |
|
1913 |
err = free_fid(s, fid); |
1914 |
if (err < 0) { |
1915 |
goto out;
|
1916 |
} |
1917 |
|
1918 |
offset = 7;
|
1919 |
err = offset; |
1920 |
out:
|
1921 |
complete_pdu(s, pdu, err); |
1922 |
} |
1923 |
|
1924 |
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1925 |
|
1926 |
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1927 |
{ |
1928 |
if (err) {
|
1929 |
goto out;
|
1930 |
} |
1931 |
v9fs_stat_free(&vs->v9stat); |
1932 |
v9fs_string_free(&vs->name); |
1933 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1934 |
vs->offset += vs->count; |
1935 |
err = vs->offset; |
1936 |
out:
|
1937 |
complete_pdu(s, vs->pdu, err); |
1938 |
qemu_free(vs); |
1939 |
return;
|
1940 |
} |
1941 |
|
1942 |
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, |
1943 |
ssize_t err) |
1944 |
{ |
1945 |
if (err) {
|
1946 |
err = -errno; |
1947 |
goto out;
|
1948 |
} |
1949 |
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); |
1950 |
if (err) {
|
1951 |
goto out;
|
1952 |
} |
1953 |
|
1954 |
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", |
1955 |
&vs->v9stat); |
1956 |
if ((vs->len != (vs->v9stat.size + 2)) || |
1957 |
((vs->count + vs->len) > vs->max_count)) { |
1958 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
1959 |
v9fs_read_post_seekdir(s, vs, err); |
1960 |
return;
|
1961 |
} |
1962 |
vs->count += vs->len; |
1963 |
v9fs_stat_free(&vs->v9stat); |
1964 |
v9fs_string_free(&vs->name); |
1965 |
vs->dir_pos = vs->dent->d_off; |
1966 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
1967 |
v9fs_read_post_readdir(s, vs, err); |
1968 |
return;
|
1969 |
out:
|
1970 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
1971 |
v9fs_read_post_seekdir(s, vs, err); |
1972 |
return;
|
1973 |
|
1974 |
} |
1975 |
|
1976 |
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1977 |
{ |
1978 |
if (vs->dent) {
|
1979 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
1980 |
v9fs_string_init(&vs->name); |
1981 |
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
1982 |
vs->dent->d_name); |
1983 |
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); |
1984 |
v9fs_read_post_dir_lstat(s, vs, err); |
1985 |
return;
|
1986 |
} |
1987 |
|
1988 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
1989 |
vs->offset += vs->count; |
1990 |
err = vs->offset; |
1991 |
complete_pdu(s, vs->pdu, err); |
1992 |
qemu_free(vs); |
1993 |
return;
|
1994 |
} |
1995 |
|
1996 |
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
1997 |
{ |
1998 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
1999 |
v9fs_read_post_readdir(s, vs, err); |
2000 |
return;
|
2001 |
} |
2002 |
|
2003 |
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, |
2004 |
ssize_t err) |
2005 |
{ |
2006 |
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
2007 |
v9fs_read_post_telldir(s, vs, err); |
2008 |
return;
|
2009 |
} |
2010 |
|
2011 |
static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
2012 |
{ |
2013 |
if (err < 0) { |
2014 |
/* IO error return the error */
|
2015 |
err = -errno; |
2016 |
goto out;
|
2017 |
} |
2018 |
vs->total += vs->len; |
2019 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
2020 |
if (vs->total < vs->count && vs->len > 0) { |
2021 |
do {
|
2022 |
if (0) { |
2023 |
print_sg(vs->sg, vs->cnt); |
2024 |
} |
2025 |
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2026 |
vs->off); |
2027 |
if (vs->len > 0) { |
2028 |
vs->off += vs->len; |
2029 |
} |
2030 |
} while (vs->len == -1 && errno == EINTR); |
2031 |
if (vs->len == -1) { |
2032 |
err = -errno; |
2033 |
} |
2034 |
v9fs_read_post_preadv(s, vs, err); |
2035 |
return;
|
2036 |
} |
2037 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
2038 |
vs->offset += vs->count; |
2039 |
err = vs->offset; |
2040 |
|
2041 |
out:
|
2042 |
complete_pdu(s, vs->pdu, err); |
2043 |
qemu_free(vs); |
2044 |
} |
2045 |
|
2046 |
static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
2047 |
{ |
2048 |
ssize_t err = 0;
|
2049 |
int read_count;
|
2050 |
int64_t xattr_len; |
2051 |
|
2052 |
xattr_len = vs->fidp->fs.xattr.len; |
2053 |
read_count = xattr_len - vs->off; |
2054 |
if (read_count > vs->count) {
|
2055 |
read_count = vs->count; |
2056 |
} else if (read_count < 0) { |
2057 |
/*
|
2058 |
* read beyond XATTR value
|
2059 |
*/
|
2060 |
read_count = 0;
|
2061 |
} |
2062 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
|
2063 |
vs->offset += pdu_pack(vs->pdu, vs->offset, |
2064 |
((char *)vs->fidp->fs.xattr.value) + vs->off,
|
2065 |
read_count); |
2066 |
err = vs->offset; |
2067 |
complete_pdu(s, vs->pdu, err); |
2068 |
qemu_free(vs); |
2069 |
} |
2070 |
|
2071 |
static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
2072 |
{ |
2073 |
int32_t fid; |
2074 |
V9fsReadState *vs; |
2075 |
ssize_t err = 0;
|
2076 |
|
2077 |
vs = qemu_malloc(sizeof(*vs));
|
2078 |
vs->pdu = pdu; |
2079 |
vs->offset = 7;
|
2080 |
vs->total = 0;
|
2081 |
vs->len = 0;
|
2082 |
vs->count = 0;
|
2083 |
|
2084 |
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
2085 |
|
2086 |
vs->fidp = lookup_fid(s, fid); |
2087 |
if (vs->fidp == NULL) { |
2088 |
err = -EINVAL; |
2089 |
goto out;
|
2090 |
} |
2091 |
|
2092 |
if (vs->fidp->fid_type == P9_FID_DIR) {
|
2093 |
vs->max_count = vs->count; |
2094 |
vs->count = 0;
|
2095 |
if (vs->off == 0) { |
2096 |
v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
2097 |
} |
2098 |
v9fs_read_post_rewinddir(s, vs, err); |
2099 |
return;
|
2100 |
} else if (vs->fidp->fid_type == P9_FID_FILE) { |
2101 |
vs->sg = vs->iov; |
2102 |
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); |
2103 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2104 |
if (vs->total <= vs->count) {
|
2105 |
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2106 |
vs->off); |
2107 |
if (vs->len > 0) { |
2108 |
vs->off += vs->len; |
2109 |
} |
2110 |
err = vs->len; |
2111 |
v9fs_read_post_preadv(s, vs, err); |
2112 |
} |
2113 |
return;
|
2114 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2115 |
v9fs_xattr_read(s, vs); |
2116 |
return;
|
2117 |
} else {
|
2118 |
err = -EINVAL; |
2119 |
} |
2120 |
out:
|
2121 |
complete_pdu(s, pdu, err); |
2122 |
qemu_free(vs); |
2123 |
} |
2124 |
|
2125 |
typedef struct V9fsReadDirState { |
2126 |
V9fsPDU *pdu; |
2127 |
V9fsFidState *fidp; |
2128 |
V9fsQID qid; |
2129 |
off_t saved_dir_pos; |
2130 |
struct dirent *dent;
|
2131 |
int32_t count; |
2132 |
int32_t max_count; |
2133 |
size_t offset; |
2134 |
int64_t initial_offset; |
2135 |
V9fsString name; |
2136 |
} V9fsReadDirState; |
2137 |
|
2138 |
static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs) |
2139 |
{ |
2140 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
2141 |
vs->offset += vs->count; |
2142 |
complete_pdu(s, vs->pdu, vs->offset); |
2143 |
qemu_free(vs); |
2144 |
return;
|
2145 |
} |
2146 |
|
2147 |
/* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
2148 |
* size of type (1) + size of name.size (2) + strlen(name.data)
|
2149 |
*/
|
2150 |
#define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data)) |
2151 |
|
2152 |
static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs) |
2153 |
{ |
2154 |
int len;
|
2155 |
size_t size; |
2156 |
|
2157 |
if (vs->dent) {
|
2158 |
v9fs_string_init(&vs->name); |
2159 |
v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name);
|
2160 |
|
2161 |
if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
|
2162 |
/* Ran out of buffer. Set dir back to old position and return */
|
2163 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos); |
2164 |
v9fs_readdir_post_seekdir(s, vs); |
2165 |
return;
|
2166 |
} |
2167 |
|
2168 |
/* Fill up just the path field of qid because the client uses
|
2169 |
* only that. To fill the entire qid structure we will have
|
2170 |
* to stat each dirent found, which is expensive
|
2171 |
*/
|
2172 |
size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path)); |
2173 |
memcpy(&vs->qid.path, &vs->dent->d_ino, size); |
2174 |
/* Fill the other fields with dummy values */
|
2175 |
vs->qid.type = 0;
|
2176 |
vs->qid.version = 0;
|
2177 |
|
2178 |
len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs", |
2179 |
&vs->qid, vs->dent->d_off, |
2180 |
vs->dent->d_type, &vs->name); |
2181 |
vs->count += len; |
2182 |
v9fs_string_free(&vs->name); |
2183 |
vs->saved_dir_pos = vs->dent->d_off; |
2184 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
2185 |
v9fs_readdir_post_readdir(s, vs); |
2186 |
return;
|
2187 |
} |
2188 |
|
2189 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
2190 |
vs->offset += vs->count; |
2191 |
complete_pdu(s, vs->pdu, vs->offset); |
2192 |
qemu_free(vs); |
2193 |
return;
|
2194 |
} |
2195 |
|
2196 |
static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs) |
2197 |
{ |
2198 |
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
2199 |
v9fs_readdir_post_readdir(s, vs); |
2200 |
return;
|
2201 |
} |
2202 |
|
2203 |
static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs) |
2204 |
{ |
2205 |
vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
2206 |
v9fs_readdir_post_telldir(s, vs); |
2207 |
return;
|
2208 |
} |
2209 |
|
2210 |
static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu) |
2211 |
{ |
2212 |
int32_t fid; |
2213 |
V9fsReadDirState *vs; |
2214 |
ssize_t err = 0;
|
2215 |
size_t offset = 7;
|
2216 |
|
2217 |
vs = qemu_malloc(sizeof(*vs));
|
2218 |
vs->pdu = pdu; |
2219 |
vs->offset = 7;
|
2220 |
vs->count = 0;
|
2221 |
|
2222 |
pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset,
|
2223 |
&vs->max_count); |
2224 |
|
2225 |
vs->fidp = lookup_fid(s, fid); |
2226 |
if (vs->fidp == NULL || !(vs->fidp->fs.dir)) { |
2227 |
err = -EINVAL; |
2228 |
goto out;
|
2229 |
} |
2230 |
|
2231 |
if (vs->initial_offset == 0) { |
2232 |
v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
2233 |
} else {
|
2234 |
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset); |
2235 |
} |
2236 |
|
2237 |
v9fs_readdir_post_setdir(s, vs); |
2238 |
return;
|
2239 |
|
2240 |
out:
|
2241 |
complete_pdu(s, pdu, err); |
2242 |
qemu_free(vs); |
2243 |
return;
|
2244 |
} |
2245 |
|
2246 |
static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs, |
2247 |
ssize_t err) |
2248 |
{ |
2249 |
if (err < 0) { |
2250 |
/* IO error return the error */
|
2251 |
err = -errno; |
2252 |
goto out;
|
2253 |
} |
2254 |
vs->total += vs->len; |
2255 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
2256 |
if (vs->total < vs->count && vs->len > 0) { |
2257 |
do {
|
2258 |
if (0) { |
2259 |
print_sg(vs->sg, vs->cnt); |
2260 |
} |
2261 |
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2262 |
vs->off); |
2263 |
if (vs->len > 0) { |
2264 |
vs->off += vs->len; |
2265 |
} |
2266 |
} while (vs->len == -1 && errno == EINTR); |
2267 |
if (vs->len == -1) { |
2268 |
err = -errno; |
2269 |
} |
2270 |
v9fs_write_post_pwritev(s, vs, err); |
2271 |
return;
|
2272 |
} |
2273 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
2274 |
err = vs->offset; |
2275 |
out:
|
2276 |
complete_pdu(s, vs->pdu, err); |
2277 |
qemu_free(vs); |
2278 |
} |
2279 |
|
2280 |
static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
2281 |
{ |
2282 |
int i, to_copy;
|
2283 |
ssize_t err = 0;
|
2284 |
int write_count;
|
2285 |
int64_t xattr_len; |
2286 |
|
2287 |
xattr_len = vs->fidp->fs.xattr.len; |
2288 |
write_count = xattr_len - vs->off; |
2289 |
if (write_count > vs->count) {
|
2290 |
write_count = vs->count; |
2291 |
} else if (write_count < 0) { |
2292 |
/*
|
2293 |
* write beyond XATTR value len specified in
|
2294 |
* xattrcreate
|
2295 |
*/
|
2296 |
err = -ENOSPC; |
2297 |
goto out;
|
2298 |
} |
2299 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count);
|
2300 |
err = vs->offset; |
2301 |
vs->fidp->fs.xattr.copied_len += write_count; |
2302 |
/*
|
2303 |
* Now copy the content from sg list
|
2304 |
*/
|
2305 |
for (i = 0; i < vs->cnt; i++) { |
2306 |
if (write_count > vs->sg[i].iov_len) {
|
2307 |
to_copy = vs->sg[i].iov_len; |
2308 |
} else {
|
2309 |
to_copy = write_count; |
2310 |
} |
2311 |
memcpy((char *)vs->fidp->fs.xattr.value + vs->off,
|
2312 |
vs->sg[i].iov_base, to_copy); |
2313 |
/* updating vs->off since we are not using below */
|
2314 |
vs->off += to_copy; |
2315 |
write_count -= to_copy; |
2316 |
} |
2317 |
out:
|
2318 |
complete_pdu(s, vs->pdu, err); |
2319 |
qemu_free(vs); |
2320 |
} |
2321 |
|
2322 |
static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
2323 |
{ |
2324 |
int32_t fid; |
2325 |
V9fsWriteState *vs; |
2326 |
ssize_t err; |
2327 |
|
2328 |
vs = qemu_malloc(sizeof(*vs));
|
2329 |
|
2330 |
vs->pdu = pdu; |
2331 |
vs->offset = 7;
|
2332 |
vs->sg = vs->iov; |
2333 |
vs->total = 0;
|
2334 |
vs->len = 0;
|
2335 |
|
2336 |
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
2337 |
vs->sg, &vs->cnt); |
2338 |
|
2339 |
vs->fidp = lookup_fid(s, fid); |
2340 |
if (vs->fidp == NULL) { |
2341 |
err = -EINVAL; |
2342 |
goto out;
|
2343 |
} |
2344 |
|
2345 |
if (vs->fidp->fid_type == P9_FID_FILE) {
|
2346 |
if (vs->fidp->fs.fd == -1) { |
2347 |
err = -EINVAL; |
2348 |
goto out;
|
2349 |
} |
2350 |
} else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2351 |
/*
|
2352 |
* setxattr operation
|
2353 |
*/
|
2354 |
v9fs_xattr_write(s, vs); |
2355 |
return;
|
2356 |
} else {
|
2357 |
err = -EINVAL; |
2358 |
goto out;
|
2359 |
} |
2360 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2361 |
if (vs->total <= vs->count) {
|
2362 |
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off); |
2363 |
if (vs->len > 0) { |
2364 |
vs->off += vs->len; |
2365 |
} |
2366 |
err = vs->len; |
2367 |
v9fs_write_post_pwritev(s, vs, err); |
2368 |
} |
2369 |
return;
|
2370 |
out:
|
2371 |
complete_pdu(s, vs->pdu, err); |
2372 |
qemu_free(vs); |
2373 |
} |
2374 |
|
2375 |
static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
2376 |
{ |
2377 |
int err;
|
2378 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
2379 |
stat_to_qid(&vs->stbuf, &vs->qid); |
2380 |
|
2381 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
2382 |
err = vs->offset; |
2383 |
|
2384 |
complete_pdu(s, vs->pdu, err); |
2385 |
v9fs_string_free(&vs->name); |
2386 |
v9fs_string_free(&vs->extension); |
2387 |
v9fs_string_free(&vs->fullname); |
2388 |
qemu_free(vs); |
2389 |
} |
2390 |
|
2391 |
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
2392 |
{ |
2393 |
if (err == 0) { |
2394 |
vs->iounit = get_iounit(s, &vs->fidp->path); |
2395 |
v9fs_create_post_getiounit(s, vs); |
2396 |
return;
|
2397 |
} |
2398 |
|
2399 |
complete_pdu(s, vs->pdu, err); |
2400 |
v9fs_string_free(&vs->name); |
2401 |
v9fs_string_free(&vs->extension); |
2402 |
v9fs_string_free(&vs->fullname); |
2403 |
qemu_free(vs); |
2404 |
} |
2405 |
|
2406 |
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) |
2407 |
{ |
2408 |
if (err) {
|
2409 |
err = -errno; |
2410 |
} |
2411 |
v9fs_post_create(s, vs, err); |
2412 |
} |
2413 |
|
2414 |
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, |
2415 |
int err)
|
2416 |
{ |
2417 |
if (!vs->fidp->fs.dir) {
|
2418 |
err = -errno; |
2419 |
} |
2420 |
vs->fidp->fid_type = P9_FID_DIR; |
2421 |
v9fs_post_create(s, vs, err); |
2422 |
} |
2423 |
|
2424 |
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, |
2425 |
int err)
|
2426 |
{ |
2427 |
if (err) {
|
2428 |
err = -errno; |
2429 |
goto out;
|
2430 |
} |
2431 |
|
2432 |
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname); |
2433 |
v9fs_create_post_opendir(s, vs, err); |
2434 |
return;
|
2435 |
|
2436 |
out:
|
2437 |
v9fs_post_create(s, vs, err); |
2438 |
} |
2439 |
|
2440 |
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) |
2441 |
{ |
2442 |
if (err) {
|
2443 |
err = -errno; |
2444 |
goto out;
|
2445 |
} |
2446 |
|
2447 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2448 |
v9fs_create_post_dir_lstat(s, vs, err); |
2449 |
return;
|
2450 |
|
2451 |
out:
|
2452 |
v9fs_post_create(s, vs, err); |
2453 |
} |
2454 |
|
2455 |
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2456 |
{ |
2457 |
if (err) {
|
2458 |
vs->fidp->fid_type = P9_FID_NONE; |
2459 |
close(vs->fidp->fs.fd); |
2460 |
err = -errno; |
2461 |
} |
2462 |
v9fs_post_create(s, vs, err); |
2463 |
return;
|
2464 |
} |
2465 |
|
2466 |
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) |
2467 |
{ |
2468 |
if (vs->fidp->fs.fd == -1) { |
2469 |
err = -errno; |
2470 |
goto out;
|
2471 |
} |
2472 |
vs->fidp->fid_type = P9_FID_FILE; |
2473 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
2474 |
v9fs_create_post_fstat(s, vs, err); |
2475 |
|
2476 |
return;
|
2477 |
|
2478 |
out:
|
2479 |
v9fs_post_create(s, vs, err); |
2480 |
|
2481 |
} |
2482 |
|
2483 |
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) |
2484 |
{ |
2485 |
|
2486 |
if (err == 0 || errno != ENOENT) { |
2487 |
err = -errno; |
2488 |
goto out;
|
2489 |
} |
2490 |
|
2491 |
if (vs->perm & P9_STAT_MODE_DIR) {
|
2492 |
err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777,
|
2493 |
vs->fidp->uid, -1);
|
2494 |
v9fs_create_post_mkdir(s, vs, err); |
2495 |
} else if (vs->perm & P9_STAT_MODE_SYMLINK) { |
2496 |
err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
2497 |
vs->fullname.data, -1);
|
2498 |
v9fs_create_post_perms(s, vs, err); |
2499 |
} else if (vs->perm & P9_STAT_MODE_LINK) { |
2500 |
int32_t nfid = atoi(vs->extension.data); |
2501 |
V9fsFidState *nfidp = lookup_fid(s, nfid); |
2502 |
if (nfidp == NULL) { |
2503 |
err = -errno; |
2504 |
v9fs_post_create(s, vs, err); |
2505 |
} |
2506 |
err = v9fs_do_link(s, &nfidp->path, &vs->fullname); |
2507 |
v9fs_create_post_perms(s, vs, err); |
2508 |
} else if (vs->perm & P9_STAT_MODE_DEVICE) { |
2509 |
char ctype;
|
2510 |
uint32_t major, minor; |
2511 |
mode_t nmode = 0;
|
2512 |
|
2513 |
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, |
2514 |
&minor) != 3) {
|
2515 |
err = -errno; |
2516 |
v9fs_post_create(s, vs, err); |
2517 |
} |
2518 |
|
2519 |
switch (ctype) {
|
2520 |
case 'c': |
2521 |
nmode = S_IFCHR; |
2522 |
break;
|
2523 |
case 'b': |
2524 |
nmode = S_IFBLK; |
2525 |
break;
|
2526 |
default:
|
2527 |
err = -EIO; |
2528 |
v9fs_post_create(s, vs, err); |
2529 |
} |
2530 |
|
2531 |
nmode |= vs->perm & 0777;
|
2532 |
err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
2533 |
makedev(major, minor), vs->fidp->uid, -1);
|
2534 |
v9fs_create_post_perms(s, vs, err); |
2535 |
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { |
2536 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
|
2537 |
0, vs->fidp->uid, -1); |
2538 |
v9fs_post_create(s, vs, err); |
2539 |
} else if (vs->perm & P9_STAT_MODE_SOCKET) { |
2540 |
err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
|
2541 |
0, vs->fidp->uid, -1); |
2542 |
v9fs_post_create(s, vs, err); |
2543 |
} else {
|
2544 |
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
2545 |
-1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
|
2546 |
|
2547 |
v9fs_create_post_open2(s, vs, err); |
2548 |
} |
2549 |
|
2550 |
return;
|
2551 |
|
2552 |
out:
|
2553 |
v9fs_post_create(s, vs, err); |
2554 |
} |
2555 |
|
2556 |
static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
2557 |
{ |
2558 |
int32_t fid; |
2559 |
V9fsCreateState *vs; |
2560 |
int err = 0; |
2561 |
|
2562 |
vs = qemu_malloc(sizeof(*vs));
|
2563 |
vs->pdu = pdu; |
2564 |
vs->offset = 7;
|
2565 |
|
2566 |
v9fs_string_init(&vs->fullname); |
2567 |
|
2568 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
2569 |
&vs->perm, &vs->mode, &vs->extension); |
2570 |
|
2571 |
vs->fidp = lookup_fid(s, fid); |
2572 |
if (vs->fidp == NULL) { |
2573 |
err = -EINVAL; |
2574 |
goto out;
|
2575 |
} |
2576 |
|
2577 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
2578 |
vs->name.data); |
2579 |
|
2580 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2581 |
v9fs_create_post_lstat(s, vs, err); |
2582 |
return;
|
2583 |
|
2584 |
out:
|
2585 |
complete_pdu(s, vs->pdu, err); |
2586 |
v9fs_string_free(&vs->name); |
2587 |
v9fs_string_free(&vs->extension); |
2588 |
qemu_free(vs); |
2589 |
} |
2590 |
|
2591 |
static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
2592 |
{ |
2593 |
if (err == 0) { |
2594 |
stat_to_qid(&vs->stbuf, &vs->qid); |
2595 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
2596 |
err = vs->offset; |
2597 |
} else {
|
2598 |
err = -errno; |
2599 |
} |
2600 |
complete_pdu(s, vs->pdu, err); |
2601 |
v9fs_string_free(&vs->name); |
2602 |
v9fs_string_free(&vs->symname); |
2603 |
v9fs_string_free(&vs->fullname); |
2604 |
qemu_free(vs); |
2605 |
} |
2606 |
|
2607 |
static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, |
2608 |
int err)
|
2609 |
{ |
2610 |
if (err) {
|
2611 |
goto out;
|
2612 |
} |
2613 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
2614 |
out:
|
2615 |
v9fs_post_symlink(s, vs, err); |
2616 |
} |
2617 |
|
2618 |
static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu) |
2619 |
{ |
2620 |
int32_t dfid; |
2621 |
V9fsSymlinkState *vs; |
2622 |
int err = 0; |
2623 |
gid_t gid; |
2624 |
|
2625 |
vs = qemu_malloc(sizeof(*vs));
|
2626 |
vs->pdu = pdu; |
2627 |
vs->offset = 7;
|
2628 |
|
2629 |
v9fs_string_init(&vs->fullname); |
2630 |
|
2631 |
pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
|
2632 |
&vs->symname, &gid); |
2633 |
|
2634 |
vs->dfidp = lookup_fid(s, dfid); |
2635 |
if (vs->dfidp == NULL) { |
2636 |
err = -EINVAL; |
2637 |
goto out;
|
2638 |
} |
2639 |
|
2640 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
|
2641 |
vs->name.data); |
2642 |
err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, |
2643 |
vs->fullname.data, gid); |
2644 |
v9fs_symlink_post_do_symlink(s, vs, err); |
2645 |
return;
|
2646 |
|
2647 |
out:
|
2648 |
complete_pdu(s, vs->pdu, err); |
2649 |
v9fs_string_free(&vs->name); |
2650 |
v9fs_string_free(&vs->symname); |
2651 |
qemu_free(vs); |
2652 |
} |
2653 |
|
2654 |
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
2655 |
{ |
2656 |
/* A nop call with no return */
|
2657 |
complete_pdu(s, pdu, 7);
|
2658 |
} |
2659 |
|
2660 |
static void v9fs_link(V9fsState *s, V9fsPDU *pdu) |
2661 |
{ |
2662 |
int32_t dfid, oldfid; |
2663 |
V9fsFidState *dfidp, *oldfidp; |
2664 |
V9fsString name, fullname; |
2665 |
size_t offset = 7;
|
2666 |
int err = 0; |
2667 |
|
2668 |
v9fs_string_init(&fullname); |
2669 |
|
2670 |
pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
|
2671 |
|
2672 |
dfidp = lookup_fid(s, dfid); |
2673 |
if (dfidp == NULL) { |
2674 |
err = -errno; |
2675 |
goto out;
|
2676 |
} |
2677 |
|
2678 |
oldfidp = lookup_fid(s, oldfid); |
2679 |
if (oldfidp == NULL) { |
2680 |
err = -errno; |
2681 |
goto out;
|
2682 |
} |
2683 |
|
2684 |
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
|
2685 |
err = offset; |
2686 |
err = v9fs_do_link(s, &oldfidp->path, &fullname); |
2687 |
if (err) {
|
2688 |
err = -errno; |
2689 |
} |
2690 |
v9fs_string_free(&fullname); |
2691 |
|
2692 |
out:
|
2693 |
v9fs_string_free(&name); |
2694 |
complete_pdu(s, pdu, err); |
2695 |
} |
2696 |
|
2697 |
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
2698 |
int err)
|
2699 |
{ |
2700 |
if (err < 0) { |
2701 |
err = -errno; |
2702 |
} else {
|
2703 |
err = vs->offset; |
2704 |
} |
2705 |
|
2706 |
/* For TREMOVE we need to clunk the fid even on failed remove */
|
2707 |
free_fid(s, vs->fidp->fid); |
2708 |
|
2709 |
complete_pdu(s, vs->pdu, err); |
2710 |
qemu_free(vs); |
2711 |
} |
2712 |
|
2713 |
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
2714 |
{ |
2715 |
int32_t fid; |
2716 |
V9fsRemoveState *vs; |
2717 |
int err = 0; |
2718 |
|
2719 |
vs = qemu_malloc(sizeof(*vs));
|
2720 |
vs->pdu = pdu; |
2721 |
vs->offset = 7;
|
2722 |
|
2723 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
2724 |
|
2725 |
vs->fidp = lookup_fid(s, fid); |
2726 |
if (vs->fidp == NULL) { |
2727 |
err = -EINVAL; |
2728 |
goto out;
|
2729 |
} |
2730 |
|
2731 |
err = v9fs_do_remove(s, &vs->fidp->path); |
2732 |
v9fs_remove_post_remove(s, vs, err); |
2733 |
return;
|
2734 |
|
2735 |
out:
|
2736 |
complete_pdu(s, pdu, err); |
2737 |
qemu_free(vs); |
2738 |
} |
2739 |
|
2740 |
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2741 |
{ |
2742 |
if (err < 0) { |
2743 |
goto out;
|
2744 |
} |
2745 |
|
2746 |
err = vs->offset; |
2747 |
|
2748 |
out:
|
2749 |
v9fs_stat_free(&vs->v9stat); |
2750 |
complete_pdu(s, vs->pdu, err); |
2751 |
qemu_free(vs); |
2752 |
} |
2753 |
|
2754 |
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) |
2755 |
{ |
2756 |
if (err < 0) { |
2757 |
goto out;
|
2758 |
} |
2759 |
if (vs->v9stat.length != -1) { |
2760 |
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { |
2761 |
err = -errno; |
2762 |
} |
2763 |
} |
2764 |
v9fs_wstat_post_truncate(s, vs, err); |
2765 |
return;
|
2766 |
|
2767 |
out:
|
2768 |
v9fs_stat_free(&vs->v9stat); |
2769 |
complete_pdu(s, vs->pdu, err); |
2770 |
qemu_free(vs); |
2771 |
} |
2772 |
|
2773 |
static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs) |
2774 |
{ |
2775 |
int err = 0; |
2776 |
char *old_name, *new_name;
|
2777 |
char *end;
|
2778 |
|
2779 |
if (vs->newdirfid != -1) { |
2780 |
V9fsFidState *dirfidp; |
2781 |
dirfidp = lookup_fid(s, vs->newdirfid); |
2782 |
|
2783 |
if (dirfidp == NULL) { |
2784 |
err = -ENOENT; |
2785 |
goto out;
|
2786 |
} |
2787 |
|
2788 |
BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
2789 |
|
2790 |
new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2);
|
2791 |
|
2792 |
strcpy(new_name, dirfidp->path.data); |
2793 |
strcat(new_name, "/");
|
2794 |
strcat(new_name + dirfidp->path.size, vs->name.data); |
2795 |
} else {
|
2796 |
old_name = vs->fidp->path.data; |
2797 |
end = strrchr(old_name, '/');
|
2798 |
if (end) {
|
2799 |
end++; |
2800 |
} else {
|
2801 |
end = old_name; |
2802 |
} |
2803 |
new_name = qemu_mallocz(end - old_name + vs->name.size + 1);
|
2804 |
|
2805 |
strncat(new_name, old_name, end - old_name); |
2806 |
strncat(new_name + (end - old_name), vs->name.data, vs->name.size); |
2807 |
} |
2808 |
|
2809 |
v9fs_string_free(&vs->name); |
2810 |
vs->name.data = qemu_strdup(new_name); |
2811 |
vs->name.size = strlen(new_name); |
2812 |
|
2813 |
if (strcmp(new_name, vs->fidp->path.data) != 0) { |
2814 |
if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) {
|
2815 |
err = -errno; |
2816 |
} else {
|
2817 |
V9fsFidState *fidp; |
2818 |
/*
|
2819 |
* Fixup fid's pointing to the old name to
|
2820 |
* start pointing to the new name
|
2821 |
*/
|
2822 |
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
2823 |
if (vs->fidp == fidp) {
|
2824 |
/*
|
2825 |
* we replace name of this fid towards the end so
|
2826 |
* that our below v9fs_path_is_ancestor check will
|
2827 |
* work
|
2828 |
*/
|
2829 |
continue;
|
2830 |
} |
2831 |
if (v9fs_path_is_ancestor(&vs->fidp->path, &fidp->path)) {
|
2832 |
/* replace the name */
|
2833 |
v9fs_fix_path(&fidp->path, &vs->name, |
2834 |
strlen(vs->fidp->path.data)); |
2835 |
} |
2836 |
} |
2837 |
v9fs_string_copy(&vs->fidp->path, &vs->name); |
2838 |
} |
2839 |
} |
2840 |
out:
|
2841 |
v9fs_string_free(&vs->name); |
2842 |
return err;
|
2843 |
} |
2844 |
|
2845 |
static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err) |
2846 |
{ |
2847 |
complete_pdu(s, vs->pdu, err); |
2848 |
qemu_free(vs); |
2849 |
} |
2850 |
|
2851 |
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
2852 |
{ |
2853 |
if (err < 0) { |
2854 |
goto out;
|
2855 |
} |
2856 |
|
2857 |
if (vs->v9stat.name.size != 0) { |
2858 |
V9fsRenameState *vr; |
2859 |
|
2860 |
vr = qemu_mallocz(sizeof(V9fsRenameState));
|
2861 |
vr->newdirfid = -1;
|
2862 |
vr->pdu = vs->pdu; |
2863 |
vr->fidp = vs->fidp; |
2864 |
vr->offset = vs->offset; |
2865 |
vr->name.size = vs->v9stat.name.size; |
2866 |
vr->name.data = qemu_strdup(vs->v9stat.name.data); |
2867 |
|
2868 |
err = v9fs_complete_rename(s, vr); |
2869 |
qemu_free(vr); |
2870 |
} |
2871 |
v9fs_wstat_post_rename(s, vs, err); |
2872 |
return;
|
2873 |
|
2874 |
out:
|
2875 |
v9fs_stat_free(&vs->v9stat); |
2876 |
complete_pdu(s, vs->pdu, err); |
2877 |
qemu_free(vs); |
2878 |
} |
2879 |
|
2880 |
static void v9fs_rename(V9fsState *s, V9fsPDU *pdu) |
2881 |
{ |
2882 |
int32_t fid; |
2883 |
V9fsRenameState *vs; |
2884 |
ssize_t err = 0;
|
2885 |
|
2886 |
vs = qemu_malloc(sizeof(*vs));
|
2887 |
vs->pdu = pdu; |
2888 |
vs->offset = 7;
|
2889 |
|
2890 |
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name);
|
2891 |
|
2892 |
vs->fidp = lookup_fid(s, fid); |
2893 |
if (vs->fidp == NULL) { |
2894 |
err = -ENOENT; |
2895 |
goto out;
|
2896 |
} |
2897 |
|
2898 |
BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
2899 |
|
2900 |
err = v9fs_complete_rename(s, vs); |
2901 |
v9fs_rename_post_rename(s, vs, err); |
2902 |
return;
|
2903 |
out:
|
2904 |
complete_pdu(s, vs->pdu, err); |
2905 |
qemu_free(vs); |
2906 |
} |
2907 |
|
2908 |
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2909 |
{ |
2910 |
if (err < 0) { |
2911 |
goto out;
|
2912 |
} |
2913 |
|
2914 |
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
2915 |
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
2916 |
vs->v9stat.n_gid)) { |
2917 |
err = -errno; |
2918 |
} |
2919 |
} |
2920 |
v9fs_wstat_post_chown(s, vs, err); |
2921 |
return;
|
2922 |
|
2923 |
out:
|
2924 |
v9fs_stat_free(&vs->v9stat); |
2925 |
complete_pdu(s, vs->pdu, err); |
2926 |
qemu_free(vs); |
2927 |
} |
2928 |
|
2929 |
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) |
2930 |
{ |
2931 |
if (err < 0) { |
2932 |
goto out;
|
2933 |
} |
2934 |
|
2935 |
if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
2936 |
struct timespec times[2]; |
2937 |
if (vs->v9stat.atime != -1) { |
2938 |
times[0].tv_sec = vs->v9stat.atime;
|
2939 |
times[0].tv_nsec = 0; |
2940 |
} else {
|
2941 |
times[0].tv_nsec = UTIME_OMIT;
|
2942 |
} |
2943 |
if (vs->v9stat.mtime != -1) { |
2944 |
times[1].tv_sec = vs->v9stat.mtime;
|
2945 |
times[1].tv_nsec = 0; |
2946 |
} else {
|
2947 |
times[1].tv_nsec = UTIME_OMIT;
|
2948 |
} |
2949 |
|
2950 |
if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
|
2951 |
err = -errno; |
2952 |
} |
2953 |
} |
2954 |
|
2955 |
v9fs_wstat_post_utime(s, vs, err); |
2956 |
return;
|
2957 |
|
2958 |
out:
|
2959 |
v9fs_stat_free(&vs->v9stat); |
2960 |
complete_pdu(s, vs->pdu, err); |
2961 |
qemu_free(vs); |
2962 |
} |
2963 |
|
2964 |
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) |
2965 |
{ |
2966 |
if (err == -1) { |
2967 |
err = -errno; |
2968 |
} |
2969 |
v9fs_stat_free(&vs->v9stat); |
2970 |
complete_pdu(s, vs->pdu, err); |
2971 |
qemu_free(vs); |
2972 |
} |
2973 |
|
2974 |
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) |
2975 |
{ |
2976 |
uint32_t v9_mode; |
2977 |
|
2978 |
if (err == -1) { |
2979 |
err = -errno; |
2980 |
goto out;
|
2981 |
} |
2982 |
|
2983 |
v9_mode = stat_to_v9mode(&vs->stbuf); |
2984 |
|
2985 |
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
2986 |
(v9_mode & P9_STAT_MODE_TYPE_BITS)) { |
2987 |
/* Attempting to change the type */
|
2988 |
err = -EIO; |
2989 |
goto out;
|
2990 |
} |
2991 |
|
2992 |
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
2993 |
&vs->v9stat.extension))) { |
2994 |
err = -errno; |
2995 |
} |
2996 |
v9fs_wstat_post_chmod(s, vs, err); |
2997 |
return;
|
2998 |
|
2999 |
out:
|
3000 |
v9fs_stat_free(&vs->v9stat); |
3001 |
complete_pdu(s, vs->pdu, err); |
3002 |
qemu_free(vs); |
3003 |
} |
3004 |
|
3005 |
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
3006 |
{ |
3007 |
int32_t fid; |
3008 |
V9fsWstatState *vs; |
3009 |
int err = 0; |
3010 |
|
3011 |
vs = qemu_malloc(sizeof(*vs));
|
3012 |
vs->pdu = pdu; |
3013 |
vs->offset = 7;
|
3014 |
|
3015 |
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
3016 |
|
3017 |
vs->fidp = lookup_fid(s, fid); |
3018 |
if (vs->fidp == NULL) { |
3019 |
err = -EINVAL; |
3020 |
goto out;
|
3021 |
} |
3022 |
|
3023 |
/* do we need to sync the file? */
|
3024 |
if (donttouch_stat(&vs->v9stat)) {
|
3025 |
err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0);
|
3026 |
v9fs_wstat_post_fsync(s, vs, err); |
3027 |
return;
|
3028 |
} |
3029 |
|
3030 |
if (vs->v9stat.mode != -1) { |
3031 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
3032 |
v9fs_wstat_post_lstat(s, vs, err); |
3033 |
return;
|
3034 |
} |
3035 |
|
3036 |
v9fs_wstat_post_chmod(s, vs, err); |
3037 |
return;
|
3038 |
|
3039 |
out:
|
3040 |
v9fs_stat_free(&vs->v9stat); |
3041 |
complete_pdu(s, vs->pdu, err); |
3042 |
qemu_free(vs); |
3043 |
} |
3044 |
|
3045 |
static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err) |
3046 |
{ |
3047 |
int32_t bsize_factor; |
3048 |
|
3049 |
if (err) {
|
3050 |
err = -errno; |
3051 |
goto out;
|
3052 |
} |
3053 |
|
3054 |
/*
|
3055 |
* compute bsize factor based on host file system block size
|
3056 |
* and client msize
|
3057 |
*/
|
3058 |
bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize; |
3059 |
if (!bsize_factor) {
|
3060 |
bsize_factor = 1;
|
3061 |
} |
3062 |
vs->v9statfs.f_type = vs->stbuf.f_type; |
3063 |
vs->v9statfs.f_bsize = vs->stbuf.f_bsize; |
3064 |
vs->v9statfs.f_bsize *= bsize_factor; |
3065 |
/*
|
3066 |
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
3067 |
* adjust(divide) the number of blocks, free blocks and available
|
3068 |
* blocks by bsize factor
|
3069 |
*/
|
3070 |
vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor; |
3071 |
vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor; |
3072 |
vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor; |
3073 |
vs->v9statfs.f_files = vs->stbuf.f_files; |
3074 |
vs->v9statfs.f_ffree = vs->stbuf.f_ffree; |
3075 |
vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] | |
3076 |
(unsigned long long)vs->stbuf.f_fsid.__val[1] << 32; |
3077 |
vs->v9statfs.f_namelen = vs->stbuf.f_namelen; |
3078 |
|
3079 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
|
3080 |
vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks, |
3081 |
vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files, |
3082 |
vs->v9statfs.f_ffree, vs->v9statfs.fsid_val, |
3083 |
vs->v9statfs.f_namelen); |
3084 |
|
3085 |
out:
|
3086 |
complete_pdu(s, vs->pdu, vs->offset); |
3087 |
qemu_free(vs); |
3088 |
} |
3089 |
|
3090 |
static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu) |
3091 |
{ |
3092 |
V9fsStatfsState *vs; |
3093 |
ssize_t err = 0;
|
3094 |
|
3095 |
vs = qemu_malloc(sizeof(*vs));
|
3096 |
vs->pdu = pdu; |
3097 |
vs->offset = 7;
|
3098 |
|
3099 |
memset(&vs->v9statfs, 0, sizeof(vs->v9statfs)); |
3100 |
|
3101 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
|
3102 |
|
3103 |
vs->fidp = lookup_fid(s, vs->fid); |
3104 |
if (vs->fidp == NULL) { |
3105 |
err = -ENOENT; |
3106 |
goto out;
|
3107 |
} |
3108 |
|
3109 |
err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf); |
3110 |
v9fs_statfs_post_statfs(s, vs, err); |
3111 |
return;
|
3112 |
|
3113 |
out:
|
3114 |
complete_pdu(s, vs->pdu, err); |
3115 |
qemu_free(vs); |
3116 |
} |
3117 |
|
3118 |
static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3119 |
{ |
3120 |
if (err == -1) { |
3121 |
err = -errno; |
3122 |
goto out;
|
3123 |
} |
3124 |
|
3125 |
stat_to_qid(&vs->stbuf, &vs->qid); |
3126 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
3127 |
err = vs->offset; |
3128 |
out:
|
3129 |
complete_pdu(s, vs->pdu, err); |
3130 |
v9fs_string_free(&vs->fullname); |
3131 |
v9fs_string_free(&vs->name); |
3132 |
qemu_free(vs); |
3133 |
} |
3134 |
|
3135 |
static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err) |
3136 |
{ |
3137 |
if (err == -1) { |
3138 |
err = -errno; |
3139 |
goto out;
|
3140 |
} |
3141 |
|
3142 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
3143 |
v9fs_mknod_post_lstat(s, vs, err); |
3144 |
return;
|
3145 |
out:
|
3146 |
complete_pdu(s, vs->pdu, err); |
3147 |
v9fs_string_free(&vs->fullname); |
3148 |
v9fs_string_free(&vs->name); |
3149 |
qemu_free(vs); |
3150 |
} |
3151 |
|
3152 |
static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu) |
3153 |
{ |
3154 |
int32_t fid; |
3155 |
V9fsMkState *vs; |
3156 |
int err = 0; |
3157 |
V9fsFidState *fidp; |
3158 |
gid_t gid; |
3159 |
int mode;
|
3160 |
int major, minor;
|
3161 |
|
3162 |
vs = qemu_malloc(sizeof(*vs));
|
3163 |
vs->pdu = pdu; |
3164 |
vs->offset = 7;
|
3165 |
|
3166 |
v9fs_string_init(&vs->fullname); |
3167 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode,
|
3168 |
&major, &minor, &gid); |
3169 |
|
3170 |
fidp = lookup_fid(s, fid); |
3171 |
if (fidp == NULL) { |
3172 |
err = -ENOENT; |
3173 |
goto out;
|
3174 |
} |
3175 |
|
3176 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
3177 |
err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor), |
3178 |
fidp->uid, gid); |
3179 |
v9fs_mknod_post_mknod(s, vs, err); |
3180 |
return;
|
3181 |
|
3182 |
out:
|
3183 |
complete_pdu(s, vs->pdu, err); |
3184 |
v9fs_string_free(&vs->fullname); |
3185 |
v9fs_string_free(&vs->name); |
3186 |
qemu_free(vs); |
3187 |
} |
3188 |
|
3189 |
/*
|
3190 |
* Implement posix byte range locking code
|
3191 |
* Server side handling of locking code is very simple, because 9p server in
|
3192 |
* QEMU can handle only one client. And most of the lock handling
|
3193 |
* (like conflict, merging) etc is done by the VFS layer itself, so no need to
|
3194 |
* do any thing in * qemu 9p server side lock code path.
|
3195 |
* So when a TLOCK request comes, always return success
|
3196 |
*/
|
3197 |
|
3198 |
static void v9fs_lock(V9fsState *s, V9fsPDU *pdu) |
3199 |
{ |
3200 |
int32_t fid, err = 0;
|
3201 |
V9fsLockState *vs; |
3202 |
|
3203 |
vs = qemu_mallocz(sizeof(*vs));
|
3204 |
vs->pdu = pdu; |
3205 |
vs->offset = 7;
|
3206 |
|
3207 |
vs->flock = qemu_malloc(sizeof(*vs->flock));
|
3208 |
pdu_unmarshal(vs->pdu, vs->offset, "dbdqqds", &fid, &vs->flock->type,
|
3209 |
&vs->flock->flags, &vs->flock->start, &vs->flock->length, |
3210 |
&vs->flock->proc_id, &vs->flock->client_id); |
3211 |
|
3212 |
vs->status = P9_LOCK_ERROR; |
3213 |
|
3214 |
/* We support only block flag now (that too ignored currently) */
|
3215 |
if (vs->flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
|
3216 |
err = -EINVAL; |
3217 |
goto out;
|
3218 |
} |
3219 |
vs->fidp = lookup_fid(s, fid); |
3220 |
if (vs->fidp == NULL) { |
3221 |
err = -ENOENT; |
3222 |
goto out;
|
3223 |
} |
3224 |
|
3225 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
3226 |
if (err < 0) { |
3227 |
err = -errno; |
3228 |
goto out;
|
3229 |
} |
3230 |
vs->status = P9_LOCK_SUCCESS; |
3231 |
out:
|
3232 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "b", vs->status);
|
3233 |
complete_pdu(s, vs->pdu, err); |
3234 |
qemu_free(vs->flock); |
3235 |
qemu_free(vs); |
3236 |
} |
3237 |
|
3238 |
/*
|
3239 |
* When a TGETLOCK request comes, always return success because all lock
|
3240 |
* handling is done by client's VFS layer.
|
3241 |
*/
|
3242 |
|
3243 |
static void v9fs_getlock(V9fsState *s, V9fsPDU *pdu) |
3244 |
{ |
3245 |
int32_t fid, err = 0;
|
3246 |
V9fsGetlockState *vs; |
3247 |
|
3248 |
vs = qemu_mallocz(sizeof(*vs));
|
3249 |
vs->pdu = pdu; |
3250 |
vs->offset = 7;
|
3251 |
|
3252 |
vs->glock = qemu_malloc(sizeof(*vs->glock));
|
3253 |
pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type,
|
3254 |
&vs->glock->start, &vs->glock->length, &vs->glock->proc_id, |
3255 |
&vs->glock->client_id); |
3256 |
|
3257 |
vs->fidp = lookup_fid(s, fid); |
3258 |
if (vs->fidp == NULL) { |
3259 |
err = -ENOENT; |
3260 |
goto out;
|
3261 |
} |
3262 |
|
3263 |
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); |
3264 |
if (err < 0) { |
3265 |
err = -errno; |
3266 |
goto out;
|
3267 |
} |
3268 |
vs->glock->type = F_UNLCK; |
3269 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type,
|
3270 |
vs->glock->start, vs->glock->length, vs->glock->proc_id, |
3271 |
&vs->glock->client_id); |
3272 |
out:
|
3273 |
complete_pdu(s, vs->pdu, err); |
3274 |
qemu_free(vs->glock); |
3275 |
qemu_free(vs); |
3276 |
} |
3277 |
|
3278 |
static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3279 |
{ |
3280 |
if (err == -1) { |
3281 |
err = -errno; |
3282 |
goto out;
|
3283 |
} |
3284 |
|
3285 |
stat_to_qid(&vs->stbuf, &vs->qid); |
3286 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
3287 |
err = vs->offset; |
3288 |
out:
|
3289 |
complete_pdu(s, vs->pdu, err); |
3290 |
v9fs_string_free(&vs->fullname); |
3291 |
v9fs_string_free(&vs->name); |
3292 |
qemu_free(vs); |
3293 |
} |
3294 |
|
3295 |
static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err) |
3296 |
{ |
3297 |
if (err == -1) { |
3298 |
err = -errno; |
3299 |
goto out;
|
3300 |
} |
3301 |
|
3302 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
3303 |
v9fs_mkdir_post_lstat(s, vs, err); |
3304 |
return;
|
3305 |
out:
|
3306 |
complete_pdu(s, vs->pdu, err); |
3307 |
v9fs_string_free(&vs->fullname); |
3308 |
v9fs_string_free(&vs->name); |
3309 |
qemu_free(vs); |
3310 |
} |
3311 |
|
3312 |
static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu) |
3313 |
{ |
3314 |
int32_t fid; |
3315 |
V9fsMkState *vs; |
3316 |
int err = 0; |
3317 |
V9fsFidState *fidp; |
3318 |
gid_t gid; |
3319 |
int mode;
|
3320 |
|
3321 |
vs = qemu_malloc(sizeof(*vs));
|
3322 |
vs->pdu = pdu; |
3323 |
vs->offset = 7;
|
3324 |
|
3325 |
v9fs_string_init(&vs->fullname); |
3326 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode,
|
3327 |
&gid); |
3328 |
|
3329 |
fidp = lookup_fid(s, fid); |
3330 |
if (fidp == NULL) { |
3331 |
err = -ENOENT; |
3332 |
goto out;
|
3333 |
} |
3334 |
|
3335 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
3336 |
err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid); |
3337 |
v9fs_mkdir_post_mkdir(s, vs, err); |
3338 |
return;
|
3339 |
|
3340 |
out:
|
3341 |
complete_pdu(s, vs->pdu, err); |
3342 |
v9fs_string_free(&vs->fullname); |
3343 |
v9fs_string_free(&vs->name); |
3344 |
qemu_free(vs); |
3345 |
} |
3346 |
|
3347 |
static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err) |
3348 |
{ |
3349 |
|
3350 |
if (err < 0) { |
3351 |
err = -errno; |
3352 |
free_fid(s, vs->xattr_fidp->fid); |
3353 |
goto out;
|
3354 |
} |
3355 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
3356 |
err = vs->offset; |
3357 |
out:
|
3358 |
complete_pdu(s, vs->pdu, err); |
3359 |
v9fs_string_free(&vs->name); |
3360 |
qemu_free(vs); |
3361 |
return;
|
3362 |
} |
3363 |
|
3364 |
static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err) |
3365 |
{ |
3366 |
if (err < 0) { |
3367 |
err = -errno; |
3368 |
free_fid(s, vs->xattr_fidp->fid); |
3369 |
goto out;
|
3370 |
} |
3371 |
/*
|
3372 |
* Read the xattr value
|
3373 |
*/
|
3374 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
3375 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
3376 |
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
3377 |
if (vs->size) {
|
3378 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
3379 |
err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, |
3380 |
&vs->name, vs->xattr_fidp->fs.xattr.value, |
3381 |
vs->xattr_fidp->fs.xattr.len); |
3382 |
} |
3383 |
v9fs_post_xattr_getvalue(s, vs, err); |
3384 |
return;
|
3385 |
out:
|
3386 |
complete_pdu(s, vs->pdu, err); |
3387 |
v9fs_string_free(&vs->name); |
3388 |
qemu_free(vs); |
3389 |
} |
3390 |
|
3391 |
static void v9fs_post_lxattr_getvalue(V9fsState *s, |
3392 |
V9fsXattrState *vs, int err)
|
3393 |
{ |
3394 |
if (err < 0) { |
3395 |
err = -errno; |
3396 |
free_fid(s, vs->xattr_fidp->fid); |
3397 |
goto out;
|
3398 |
} |
3399 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
3400 |
err = vs->offset; |
3401 |
out:
|
3402 |
complete_pdu(s, vs->pdu, err); |
3403 |
v9fs_string_free(&vs->name); |
3404 |
qemu_free(vs); |
3405 |
return;
|
3406 |
} |
3407 |
|
3408 |
static void v9fs_post_lxattr_check(V9fsState *s, |
3409 |
V9fsXattrState *vs, ssize_t err) |
3410 |
{ |
3411 |
if (err < 0) { |
3412 |
err = -errno; |
3413 |
free_fid(s, vs->xattr_fidp->fid); |
3414 |
goto out;
|
3415 |
} |
3416 |
/*
|
3417 |
* Read the xattr value
|
3418 |
*/
|
3419 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
3420 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
3421 |
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
3422 |
if (vs->size) {
|
3423 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
3424 |
err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, |
3425 |
vs->xattr_fidp->fs.xattr.value, |
3426 |
vs->xattr_fidp->fs.xattr.len); |
3427 |
} |
3428 |
v9fs_post_lxattr_getvalue(s, vs, err); |
3429 |
return;
|
3430 |
out:
|
3431 |
complete_pdu(s, vs->pdu, err); |
3432 |
v9fs_string_free(&vs->name); |
3433 |
qemu_free(vs); |
3434 |
} |
3435 |
|
3436 |
static void v9fs_xattrwalk(V9fsState *s, V9fsPDU *pdu) |
3437 |
{ |
3438 |
ssize_t err = 0;
|
3439 |
V9fsXattrState *vs; |
3440 |
int32_t fid, newfid; |
3441 |
|
3442 |
vs = qemu_malloc(sizeof(*vs));
|
3443 |
vs->pdu = pdu; |
3444 |
vs->offset = 7;
|
3445 |
|
3446 |
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name);
|
3447 |
vs->file_fidp = lookup_fid(s, fid); |
3448 |
if (vs->file_fidp == NULL) { |
3449 |
err = -ENOENT; |
3450 |
goto out;
|
3451 |
} |
3452 |
|
3453 |
vs->xattr_fidp = alloc_fid(s, newfid); |
3454 |
if (vs->xattr_fidp == NULL) { |
3455 |
err = -EINVAL; |
3456 |
goto out;
|
3457 |
} |
3458 |
|
3459 |
v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path); |
3460 |
if (vs->name.data[0] == 0) { |
3461 |
/*
|
3462 |
* listxattr request. Get the size first
|
3463 |
*/
|
3464 |
vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, |
3465 |
NULL, 0); |
3466 |
if (vs->size < 0) { |
3467 |
err = vs->size; |
3468 |
} |
3469 |
v9fs_post_lxattr_check(s, vs, err); |
3470 |
return;
|
3471 |
} else {
|
3472 |
/*
|
3473 |
* specific xattr fid. We check for xattr
|
3474 |
* presence also collect the xattr size
|
3475 |
*/
|
3476 |
vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, |
3477 |
&vs->name, NULL, 0); |
3478 |
if (vs->size < 0) { |
3479 |
err = vs->size; |
3480 |
} |
3481 |
v9fs_post_xattr_check(s, vs, err); |
3482 |
return;
|
3483 |
} |
3484 |
out:
|
3485 |
complete_pdu(s, vs->pdu, err); |
3486 |
v9fs_string_free(&vs->name); |
3487 |
qemu_free(vs); |
3488 |
} |
3489 |
|
3490 |
static void v9fs_xattrcreate(V9fsState *s, V9fsPDU *pdu) |
3491 |
{ |
3492 |
int flags;
|
3493 |
int32_t fid; |
3494 |
ssize_t err = 0;
|
3495 |
V9fsXattrState *vs; |
3496 |
|
3497 |
vs = qemu_malloc(sizeof(*vs));
|
3498 |
vs->pdu = pdu; |
3499 |
vs->offset = 7;
|
3500 |
|
3501 |
pdu_unmarshal(vs->pdu, vs->offset, "dsqd",
|
3502 |
&fid, &vs->name, &vs->size, &flags); |
3503 |
|
3504 |
vs->file_fidp = lookup_fid(s, fid); |
3505 |
if (vs->file_fidp == NULL) { |
3506 |
err = -EINVAL; |
3507 |
goto out;
|
3508 |
} |
3509 |
|
3510 |
/* Make the file fid point to xattr */
|
3511 |
vs->xattr_fidp = vs->file_fidp; |
3512 |
vs->xattr_fidp->fid_type = P9_FID_XATTR; |
3513 |
vs->xattr_fidp->fs.xattr.copied_len = 0;
|
3514 |
vs->xattr_fidp->fs.xattr.len = vs->size; |
3515 |
vs->xattr_fidp->fs.xattr.flags = flags; |
3516 |
v9fs_string_init(&vs->xattr_fidp->fs.xattr.name); |
3517 |
v9fs_string_copy(&vs->xattr_fidp->fs.xattr.name, &vs->name); |
3518 |
if (vs->size)
|
3519 |
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); |
3520 |
else
|
3521 |
vs->xattr_fidp->fs.xattr.value = NULL;
|
3522 |
|
3523 |
out:
|
3524 |
complete_pdu(s, vs->pdu, err); |
3525 |
v9fs_string_free(&vs->name); |
3526 |
qemu_free(vs); |
3527 |
} |
3528 |
|
3529 |
static void v9fs_readlink_post_readlink(V9fsState *s, V9fsReadLinkState *vs, |
3530 |
int err)
|
3531 |
{ |
3532 |
if (err < 0) { |
3533 |
err = -errno; |
3534 |
goto out;
|
3535 |
} |
3536 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "s", &vs->target);
|
3537 |
err = vs->offset; |
3538 |
out:
|
3539 |
complete_pdu(s, vs->pdu, err); |
3540 |
v9fs_string_free(&vs->target); |
3541 |
qemu_free(vs); |
3542 |
} |
3543 |
|
3544 |
static void v9fs_readlink(V9fsState *s, V9fsPDU *pdu) |
3545 |
{ |
3546 |
int32_t fid; |
3547 |
V9fsReadLinkState *vs; |
3548 |
int err = 0; |
3549 |
V9fsFidState *fidp; |
3550 |
|
3551 |
vs = qemu_malloc(sizeof(*vs));
|
3552 |
vs->pdu = pdu; |
3553 |
vs->offset = 7;
|
3554 |
|
3555 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
3556 |
|
3557 |
fidp = lookup_fid(s, fid); |
3558 |
if (fidp == NULL) { |
3559 |
err = -ENOENT; |
3560 |
goto out;
|
3561 |
} |
3562 |
|
3563 |
v9fs_string_init(&vs->target); |
3564 |
err = v9fs_do_readlink(s, &fidp->path, &vs->target); |
3565 |
v9fs_readlink_post_readlink(s, vs, err); |
3566 |
return;
|
3567 |
out:
|
3568 |
complete_pdu(s, vs->pdu, err); |
3569 |
qemu_free(vs); |
3570 |
} |
3571 |
|
3572 |
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
3573 |
|
3574 |
static pdu_handler_t *pdu_handlers[] = {
|
3575 |
[P9_TREADDIR] = v9fs_readdir, |
3576 |
[P9_TSTATFS] = v9fs_statfs, |
3577 |
[P9_TGETATTR] = v9fs_getattr, |
3578 |
[P9_TSETATTR] = v9fs_setattr, |
3579 |
[P9_TXATTRWALK] = v9fs_xattrwalk, |
3580 |
[P9_TXATTRCREATE] = v9fs_xattrcreate, |
3581 |
[P9_TMKNOD] = v9fs_mknod, |
3582 |
[P9_TRENAME] = v9fs_rename, |
3583 |
[P9_TLOCK] = v9fs_lock, |
3584 |
[P9_TGETLOCK] = v9fs_getlock, |
3585 |
[P9_TREADLINK] = v9fs_readlink, |
3586 |
[P9_TMKDIR] = v9fs_mkdir, |
3587 |
[P9_TVERSION] = v9fs_version, |
3588 |
[P9_TLOPEN] = v9fs_open, |
3589 |
[P9_TATTACH] = v9fs_attach, |
3590 |
[P9_TSTAT] = v9fs_stat, |
3591 |
[P9_TWALK] = v9fs_walk, |
3592 |
[P9_TCLUNK] = v9fs_clunk, |
3593 |
[P9_TFSYNC] = v9fs_fsync, |
3594 |
[P9_TOPEN] = v9fs_open, |
3595 |
[P9_TREAD] = v9fs_read, |
3596 |
#if 0
|
3597 |
[P9_TAUTH] = v9fs_auth,
|
3598 |
#endif
|
3599 |
[P9_TFLUSH] = v9fs_flush, |
3600 |
[P9_TLINK] = v9fs_link, |
3601 |
[P9_TSYMLINK] = v9fs_symlink, |
3602 |
[P9_TCREATE] = v9fs_create, |
3603 |
[P9_TLCREATE] = v9fs_lcreate, |
3604 |
[P9_TWRITE] = v9fs_write, |
3605 |
[P9_TWSTAT] = v9fs_wstat, |
3606 |
[P9_TREMOVE] = v9fs_remove, |
3607 |
}; |
3608 |
|
3609 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3610 |
{ |
3611 |
pdu_handler_t *handler; |
3612 |
|
3613 |
if (debug_9p_pdu) {
|
3614 |
pprint_pdu(pdu); |
3615 |
} |
3616 |
|
3617 |
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); |
3618 |
|
3619 |
handler = pdu_handlers[pdu->id]; |
3620 |
BUG_ON(handler == NULL);
|
3621 |
|
3622 |
handler(s, pdu); |
3623 |
} |
3624 |
|
3625 |
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
3626 |
{ |
3627 |
V9fsState *s = (V9fsState *)vdev; |
3628 |
V9fsPDU *pdu; |
3629 |
ssize_t len; |
3630 |
|
3631 |
while ((pdu = alloc_pdu(s)) &&
|
3632 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
3633 |
uint8_t *ptr; |
3634 |
|
3635 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
3636 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
3637 |
|
3638 |
ptr = pdu->elem.out_sg[0].iov_base;
|
3639 |
|
3640 |
memcpy(&pdu->size, ptr, 4);
|
3641 |
pdu->id = ptr[4];
|
3642 |
memcpy(&pdu->tag, ptr + 5, 2); |
3643 |
|
3644 |
submit_pdu(s, pdu); |
3645 |
} |
3646 |
|
3647 |
free_pdu(s, pdu); |
3648 |
} |
3649 |
|
3650 |
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
3651 |
{ |
3652 |
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
3653 |
return features;
|
3654 |
} |
3655 |
|
3656 |
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
3657 |
{ |
3658 |
return (V9fsState *)vdev;
|
3659 |
} |
3660 |
|
3661 |
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) |
3662 |
{ |
3663 |
struct virtio_9p_config *cfg;
|
3664 |
V9fsState *s = to_virtio_9p(vdev); |
3665 |
|
3666 |
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + |
3667 |
s->tag_len); |
3668 |
stw_raw(&cfg->tag_len, s->tag_len); |
3669 |
memcpy(cfg->tag, s->tag, s->tag_len); |
3670 |
memcpy(config, cfg, s->config_size); |
3671 |
qemu_free(cfg); |
3672 |
} |
3673 |
|
3674 |
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) |
3675 |
{ |
3676 |
V9fsState *s; |
3677 |
int i, len;
|
3678 |
struct stat stat;
|
3679 |
FsTypeEntry *fse; |
3680 |
|
3681 |
|
3682 |
s = (V9fsState *)virtio_common_init("virtio-9p",
|
3683 |
VIRTIO_ID_9P, |
3684 |
sizeof(struct virtio_9p_config)+ |
3685 |
MAX_TAG_LEN, |
3686 |
sizeof(V9fsState));
|
3687 |
|
3688 |
/* initialize pdu allocator */
|
3689 |
QLIST_INIT(&s->free_list); |
3690 |
for (i = 0; i < (MAX_REQ - 1); i++) { |
3691 |
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
3692 |
} |
3693 |
|
3694 |
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); |
3695 |
|
3696 |
fse = get_fsdev_fsentry(conf->fsdev_id); |
3697 |
|
3698 |
if (!fse) {
|
3699 |
/* We don't have a fsdev identified by fsdev_id */
|
3700 |
fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
|
3701 |
"id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL"); |
3702 |
exit(1);
|
3703 |
} |
3704 |
|
3705 |
if (!fse->path || !conf->tag) {
|
3706 |
/* we haven't specified a mount_tag or the path */
|
3707 |
fprintf(stderr, "fsdev with id %s needs path "
|
3708 |
"and Virtio-9p device needs mount_tag arguments\n",
|
3709 |
conf->fsdev_id); |
3710 |
exit(1);
|
3711 |
} |
3712 |
|
3713 |
if (!strcmp(fse->security_model, "passthrough")) { |
3714 |
/* Files on the Fileserver set to client user credentials */
|
3715 |
s->ctx.fs_sm = SM_PASSTHROUGH; |
3716 |
s->ctx.xops = passthrough_xattr_ops; |
3717 |
} else if (!strcmp(fse->security_model, "mapped")) { |
3718 |
/* Files on the fileserver are set to QEMU credentials.
|
3719 |
* Client user credentials are saved in extended attributes.
|
3720 |
*/
|
3721 |
s->ctx.fs_sm = SM_MAPPED; |
3722 |
s->ctx.xops = mapped_xattr_ops; |
3723 |
} else if (!strcmp(fse->security_model, "none")) { |
3724 |
/*
|
3725 |
* Files on the fileserver are set to QEMU credentials.
|
3726 |
*/
|
3727 |
s->ctx.fs_sm = SM_NONE; |
3728 |
s->ctx.xops = none_xattr_ops; |
3729 |
} else {
|
3730 |
fprintf(stderr, "Default to security_model=none. You may want"
|
3731 |
" enable advanced security model using "
|
3732 |
"security option:\n\t security_model=passthrough \n\t "
|
3733 |
"security_model=mapped\n");
|
3734 |
s->ctx.fs_sm = SM_NONE; |
3735 |
s->ctx.xops = none_xattr_ops; |
3736 |
} |
3737 |
|
3738 |
if (lstat(fse->path, &stat)) {
|
3739 |
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
3740 |
exit(1);
|
3741 |
} else if (!S_ISDIR(stat.st_mode)) { |
3742 |
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
3743 |
exit(1);
|
3744 |
} |
3745 |
|
3746 |
s->ctx.fs_root = qemu_strdup(fse->path); |
3747 |
len = strlen(conf->tag); |
3748 |
if (len > MAX_TAG_LEN) {
|
3749 |
len = MAX_TAG_LEN; |
3750 |
} |
3751 |
/* s->tag is non-NULL terminated string */
|
3752 |
s->tag = qemu_malloc(len); |
3753 |
memcpy(s->tag, conf->tag, len); |
3754 |
s->tag_len = len; |
3755 |
s->ctx.uid = -1;
|
3756 |
|
3757 |
s->ops = fse->ops; |
3758 |
s->vdev.get_features = virtio_9p_get_features; |
3759 |
s->config_size = sizeof(struct virtio_9p_config) + |
3760 |
s->tag_len; |
3761 |
s->vdev.get_config = virtio_9p_get_config; |
3762 |
|
3763 |
return &s->vdev;
|
3764 |
} |
3765 |
|
3766 |
static int virtio_9p_init_pci(PCIDevice *pci_dev) |
3767 |
{ |
3768 |
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev); |
3769 |
VirtIODevice *vdev; |
3770 |
|
3771 |
vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf); |
3772 |
vdev->nvectors = proxy->nvectors; |
3773 |
virtio_init_pci(proxy, vdev, |
3774 |
PCI_VENDOR_ID_REDHAT_QUMRANET, |
3775 |
0x1009,
|
3776 |
0x2,
|
3777 |
0x00);
|
3778 |
/* make the actual value visible */
|
3779 |
proxy->nvectors = vdev->nvectors; |
3780 |
return 0; |
3781 |
} |
3782 |
|
3783 |
static PCIDeviceInfo virtio_9p_info = {
|
3784 |
.qdev.name = "virtio-9p-pci",
|
3785 |
.qdev.size = sizeof(VirtIOPCIProxy),
|
3786 |
.init = virtio_9p_init_pci, |
3787 |
.qdev.props = (Property[]) { |
3788 |
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2), |
3789 |
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features), |
3790 |
DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
|
3791 |
DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
|
3792 |
DEFINE_PROP_END_OF_LIST(), |
3793 |
} |
3794 |
}; |
3795 |
|
3796 |
static void virtio_9p_register_devices(void) |
3797 |
{ |
3798 |
pci_qdev_register(&virtio_9p_info); |
3799 |
} |
3800 |
|
3801 |
device_init(virtio_9p_register_devices) |