mirror of https://gitee.com/openkylin/qemu.git
3742 lines
94 KiB
C
3742 lines
94 KiB
C
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/*
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* Virtio 9p backend
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "virtio.h"
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#include "pc.h"
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#include "qemu_socket.h"
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#include "virtio-9p.h"
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#include "fsdev/qemu-fsdev.h"
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#include "virtio-9p-debug.h"
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#include "virtio-9p-xattr.h"
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int debug_9p_pdu;
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enum {
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Oread = 0x00,
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Owrite = 0x01,
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Ordwr = 0x02,
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Oexec = 0x03,
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Oexcl = 0x04,
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Otrunc = 0x10,
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Orexec = 0x20,
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Orclose = 0x40,
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Oappend = 0x80,
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};
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static int omode_to_uflags(int8_t mode)
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{
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int ret = 0;
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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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}
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static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
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{
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FsCred cred;
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cred_init(&cred);
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cred.fc_mode = mode;
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return s->ops->chmod(&s->ctx, path->data, &cred);
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}
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static int v9fs_do_mknod(V9fsState *s, char *name,
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mode_t mode, dev_t dev, uid_t uid, gid_t gid)
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{
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FsCred cred;
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cred_init(&cred);
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cred.fc_uid = uid;
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cred.fc_gid = gid;
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cred.fc_mode = mode;
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cred.fc_rdev = dev;
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return s->ops->mknod(&s->ctx, name, &cred);
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}
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static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode,
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uid_t uid, gid_t gid)
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{
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FsCred cred;
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cred_init(&cred);
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cred.fc_uid = uid;
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cred.fc_gid = gid;
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cred.fc_mode = mode;
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return s->ops->mkdir(&s->ctx, name, &cred);
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}
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static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf)
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{
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return s->ops->fstat(&s->ctx, fd, stbuf);
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}
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static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid,
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int flags, int mode)
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{
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FsCred cred;
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cred_init(&cred);
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cred.fc_uid = uid;
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cred.fc_gid = gid;
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cred.fc_mode = mode & 07777;
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flags = flags;
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return s->ops->open2(&s->ctx, fullname, flags, &cred);
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}
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static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp,
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const char *oldpath, const char *newpath, gid_t gid)
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{
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FsCred cred;
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cred_init(&cred);
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cred.fc_uid = fidp->uid;
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cred.fc_gid = gid;
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cred.fc_mode = 0777;
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return s->ops->symlink(&s->ctx, oldpath, newpath, &cred);
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}
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static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
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{
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return s->ops->link(&s->ctx, oldpath->data, newpath->data);
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}
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static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size)
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{
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return s->ops->truncate(&s->ctx, path->data, size);
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}
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static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath,
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V9fsString *newpath)
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{
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return s->ops->rename(&s->ctx, oldpath->data, newpath->data);
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}
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static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid)
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{
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FsCred cred;
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cred_init(&cred);
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cred.fc_uid = uid;
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cred.fc_gid = gid;
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return s->ops->chown(&s->ctx, path->data, &cred);
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}
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static int v9fs_do_utimensat(V9fsState *s, V9fsString *path,
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const struct timespec times[2])
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{
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return s->ops->utimensat(&s->ctx, path->data, times);
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}
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static int v9fs_do_remove(V9fsState *s, V9fsString *path)
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{
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return s->ops->remove(&s->ctx, path->data);
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}
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static int v9fs_do_fsync(V9fsState *s, int fd, int datasync)
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{
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return s->ops->fsync(&s->ctx, fd, datasync);
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}
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static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf)
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{
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return s->ops->statfs(&s->ctx, path->data, stbuf);
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}
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static ssize_t v9fs_do_lgetxattr(V9fsState *s, V9fsString *path,
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V9fsString *xattr_name,
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void *value, size_t size)
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{
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return s->ops->lgetxattr(&s->ctx, path->data,
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xattr_name->data, value, size);
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}
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|
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static ssize_t v9fs_do_llistxattr(V9fsState *s, V9fsString *path,
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void *value, size_t size)
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{
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return s->ops->llistxattr(&s->ctx, path->data,
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value, size);
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}
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|
|
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static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path,
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V9fsString *xattr_name,
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void *value, size_t size, int flags)
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{
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return s->ops->lsetxattr(&s->ctx, path->data,
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xattr_name->data, value, size, flags);
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}
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|
|
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static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path,
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V9fsString *xattr_name)
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{
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return s->ops->lremovexattr(&s->ctx, path->data,
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xattr_name->data);
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}
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|
|
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|
|
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|
static void v9fs_string_init(V9fsString *str)
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{
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str->data = NULL;
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str->size = 0;
|
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|
}
|
||
|
|
||
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static void v9fs_string_free(V9fsString *str)
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{
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qemu_free(str->data);
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str->data = NULL;
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str->size = 0;
|
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}
|
||
|
|
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static void v9fs_string_null(V9fsString *str)
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|
{
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v9fs_string_free(str);
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}
|
||
|
|
||
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static int number_to_string(void *arg, char type)
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|
{
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unsigned int ret = 0;
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|
|
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|
switch (type) {
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||
|
case 'u': {
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unsigned int num = *(unsigned int *)arg;
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|
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do {
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|
ret++;
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num = num/10;
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|
} while (num);
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|
break;
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||
|
}
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||
|
case 'U': {
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||
|
unsigned long num = *(unsigned long *)arg;
|
||
|
do {
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|
ret++;
|
||
|
num = num/10;
|
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|
} while (num);
|
||
|
break;
|
||
|
}
|
||
|
default:
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||
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printf("Number_to_string: Unknown number format\n");
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||
|
return -1;
|
||
|
}
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int GCC_FMT_ATTR(2, 0)
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|
v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap)
|
||
|
{
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||
|
va_list ap2;
|
||
|
char *iter = (char *)fmt;
|
||
|
int len = 0;
|
||
|
int nr_args = 0;
|
||
|
char *arg_char_ptr;
|
||
|
unsigned int arg_uint;
|
||
|
unsigned long arg_ulong;
|
||
|
|
||
|
/* Find the number of %'s that denotes an argument */
|
||
|
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {
|
||
|
nr_args++;
|
||
|
iter++;
|
||
|
}
|
||
|
|
||
|
len = strlen(fmt) - 2*nr_args;
|
||
|
|
||
|
if (!nr_args) {
|
||
|
goto alloc_print;
|
||
|
}
|
||
|
|
||
|
va_copy(ap2, ap);
|
||
|
|
||
|
iter = (char *)fmt;
|
||
|
|
||
|
/* Now parse the format string */
|
||
|
for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) {
|
||
|
iter++;
|
||
|
switch (*iter) {
|
||
|
case 'u':
|
||
|
arg_uint = va_arg(ap2, unsigned int);
|
||
|
len += number_to_string((void *)&arg_uint, 'u');
|
||
|
break;
|
||
|
case 'l':
|
||
|
if (*++iter == 'u') {
|
||
|
arg_ulong = va_arg(ap2, unsigned long);
|
||
|
len += number_to_string((void *)&arg_ulong, 'U');
|
||
|
} else {
|
||
|
return -1;
|
||
|
}
|
||
|
break;
|
||
|
case 's':
|
||
|
arg_char_ptr = va_arg(ap2, char *);
|
||
|
len += strlen(arg_char_ptr);
|
||
|
break;
|
||
|
case 'c':
|
||
|
len += 1;
|
||
|
break;
|
||
|
default:
|
||
|
fprintf(stderr,
|
||
|
"v9fs_string_alloc_printf:Incorrect format %c", *iter);
|
||
|
return -1;
|
||
|
}
|
||
|
iter++;
|
||
|
}
|
||
|
|
||
|
alloc_print:
|
||
|
*strp = qemu_malloc((len + 1) * sizeof(**strp));
|
||
|
|
||
|
return vsprintf(*strp, fmt, ap);
|
||
|
}
|
||
|
|
||
|
static void GCC_FMT_ATTR(2, 3)
|
||
|
v9fs_string_sprintf(V9fsString *str, const char *fmt, ...)
|
||
|
{
|
||
|
va_list ap;
|
||
|
int err;
|
||
|
|
||
|
v9fs_string_free(str);
|
||
|
|
||
|
va_start(ap, fmt);
|
||
|
err = v9fs_string_alloc_printf(&str->data, fmt, ap);
|
||
|
BUG_ON(err == -1);
|
||
|
va_end(ap);
|
||
|
|
||
|
str->size = err;
|
||
|
}
|
||
|
|
||
|
static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs)
|
||
|
{
|
||
|
v9fs_string_free(lhs);
|
||
|
v9fs_string_sprintf(lhs, "%s", rhs->data);
|
||
|
}
|
||
|
|
||
|
static size_t v9fs_string_size(V9fsString *str)
|
||
|
{
|
||
|
return str->size;
|
||
|
}
|
||
|
|
||
|
static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
|
||
|
{
|
||
|
V9fsFidState *f;
|
||
|
|
||
|
for (f = s->fid_list; f; f = f->next) {
|
||
|
if (f->fid == fid) {
|
||
|
return f;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
||
|
{
|
||
|
V9fsFidState *f;
|
||
|
|
||
|
f = lookup_fid(s, fid);
|
||
|
if (f) {
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
f = qemu_mallocz(sizeof(V9fsFidState));
|
||
|
|
||
|
f->fid = fid;
|
||
|
f->fid_type = P9_FID_NONE;
|
||
|
|
||
|
f->next = s->fid_list;
|
||
|
s->fid_list = f;
|
||
|
|
||
|
return f;
|
||
|
}
|
||
|
|
||
|
static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp)
|
||
|
{
|
||
|
int retval = 0;
|
||
|
|
||
|
if (fidp->fs.xattr.copied_len == -1) {
|
||
|
/* getxattr/listxattr fid */
|
||
|
goto free_value;
|
||
|
}
|
||
|
/*
|
||
|
* if this is fid for setxattr. clunk should
|
||
|
* result in setxattr localcall
|
||
|
*/
|
||
|
if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) {
|
||
|
/* clunk after partial write */
|
||
|
retval = -EINVAL;
|
||
|
goto free_out;
|
||
|
}
|
||
|
if (fidp->fs.xattr.len) {
|
||
|
retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name,
|
||
|
fidp->fs.xattr.value,
|
||
|
fidp->fs.xattr.len,
|
||
|
fidp->fs.xattr.flags);
|
||
|
} else {
|
||
|
retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name);
|
||
|
}
|
||
|
free_out:
|
||
|
v9fs_string_free(&fidp->fs.xattr.name);
|
||
|
free_value:
|
||
|
if (fidp->fs.xattr.value) {
|
||
|
qemu_free(fidp->fs.xattr.value);
|
||
|
}
|
||
|
return retval;
|
||
|
}
|
||
|
|
||
|
static int free_fid(V9fsState *s, int32_t fid)
|
||
|
{
|
||
|
int retval = 0;
|
||
|
V9fsFidState **fidpp, *fidp;
|
||
|
|
||
|
for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
|
||
|
if ((*fidpp)->fid == fid) {
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (*fidpp == NULL) {
|
||
|
return -ENOENT;
|
||
|
}
|
||
|
|
||
|
fidp = *fidpp;
|
||
|
*fidpp = fidp->next;
|
||
|
|
||
|
if (fidp->fid_type == P9_FID_FILE) {
|
||
|
v9fs_do_close(s, fidp->fs.fd);
|
||
|
} else if (fidp->fid_type == P9_FID_DIR) {
|
||
|
v9fs_do_closedir(s, fidp->fs.dir);
|
||
|
} else if (fidp->fid_type == P9_FID_XATTR) {
|
||
|
retval = v9fs_xattr_fid_clunk(s, fidp);
|
||
|
}
|
||
|
v9fs_string_free(&fidp->path);
|
||
|
qemu_free(fidp);
|
||
|
|
||
|
return retval;
|
||
|
}
|
||
|
|
||
|
#define P9_QID_TYPE_DIR 0x80
|
||
|
#define P9_QID_TYPE_SYMLINK 0x02
|
||
|
|
||
|
#define P9_STAT_MODE_DIR 0x80000000
|
||
|
#define P9_STAT_MODE_APPEND 0x40000000
|
||
|
#define P9_STAT_MODE_EXCL 0x20000000
|
||
|
#define P9_STAT_MODE_MOUNT 0x10000000
|
||
|
#define P9_STAT_MODE_AUTH 0x08000000
|
||
|
#define P9_STAT_MODE_TMP 0x04000000
|
||
|
#define P9_STAT_MODE_SYMLINK 0x02000000
|
||
|
#define P9_STAT_MODE_LINK 0x01000000
|
||
|
#define P9_STAT_MODE_DEVICE 0x00800000
|
||
|
#define P9_STAT_MODE_NAMED_PIPE 0x00200000
|
||
|
#define P9_STAT_MODE_SOCKET 0x00100000
|
||
|
#define P9_STAT_MODE_SETUID 0x00080000
|
||
|
#define P9_STAT_MODE_SETGID 0x00040000
|
||
|
#define P9_STAT_MODE_SETVTX 0x00010000
|
||
|
|
||
|
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
||
|
P9_STAT_MODE_SYMLINK | \
|
||
|
P9_STAT_MODE_LINK | \
|
||
|
P9_STAT_MODE_DEVICE | \
|
||
|
P9_STAT_MODE_NAMED_PIPE | \
|
||
|
P9_STAT_MODE_SOCKET)
|
||
|
|
||
|
/* This is the algorithm from ufs in spfs */
|
||
|
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp)
|
||
|
{
|
||
|
size_t size;
|
||
|
|
||
|
size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path));
|
||
|
memcpy(&qidp->path, &stbuf->st_ino, size);
|
||
|
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
||
|
qidp->type = 0;
|
||
|
if (S_ISDIR(stbuf->st_mode)) {
|
||
|
qidp->type |= P9_QID_TYPE_DIR;
|
||
|
}
|
||
|
if (S_ISLNK(stbuf->st_mode)) {
|
||
|
qidp->type |= P9_QID_TYPE_SYMLINK;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp)
|
||
|
{
|
||
|
struct stat stbuf;
|
||
|
int err;
|
||
|
|
||
|
err = v9fs_do_lstat(s, &fidp->path, &stbuf);
|
||
|
if (err) {
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
stat_to_qid(&stbuf, qidp);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static V9fsPDU *alloc_pdu(V9fsState *s)
|
||
|
{
|
||
|
V9fsPDU *pdu = NULL;
|
||
|
|
||
|
if (!QLIST_EMPTY(&s->free_list)) {
|
||
|
pdu = QLIST_FIRST(&s->free_list);
|
||
|
QLIST_REMOVE(pdu, next);
|
||
|
}
|
||
|
return pdu;
|
||
|
}
|
||
|
|
||
|
static void free_pdu(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
if (pdu) {
|
||
|
QLIST_INSERT_HEAD(&s->free_list, pdu, next);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
|
||
|
size_t offset, size_t size, int pack)
|
||
|
{
|
||
|
int i = 0;
|
||
|
size_t copied = 0;
|
||
|
|
||
|
for (i = 0; size && i < sg_count; i++) {
|
||
|
size_t len;
|
||
|
if (offset >= sg[i].iov_len) {
|
||
|
/* skip this sg */
|
||
|
offset -= sg[i].iov_len;
|
||
|
continue;
|
||
|
} else {
|
||
|
len = MIN(sg[i].iov_len - offset, size);
|
||
|
if (pack) {
|
||
|
memcpy(sg[i].iov_base + offset, addr, len);
|
||
|
} else {
|
||
|
memcpy(addr, sg[i].iov_base + offset, len);
|
||
|
}
|
||
|
size -= len;
|
||
|
copied += len;
|
||
|
addr += len;
|
||
|
if (size) {
|
||
|
offset = 0;
|
||
|
continue;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return copied;
|
||
|
}
|
||
|
|
||
|
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size)
|
||
|
{
|
||
|
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
||
|
offset, size, 0);
|
||
|
}
|
||
|
|
||
|
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src,
|
||
|
size_t size)
|
||
|
{
|
||
|
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num,
|
||
|
offset, size, 1);
|
||
|
}
|
||
|
|
||
|
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg)
|
||
|
{
|
||
|
size_t pos = 0;
|
||
|
int i, j;
|
||
|
struct iovec *src_sg;
|
||
|
unsigned int num;
|
||
|
|
||
|
if (rx) {
|
||
|
src_sg = pdu->elem.in_sg;
|
||
|
num = pdu->elem.in_num;
|
||
|
} else {
|
||
|
src_sg = pdu->elem.out_sg;
|
||
|
num = pdu->elem.out_num;
|
||
|
}
|
||
|
|
||
|
j = 0;
|
||
|
for (i = 0; i < num; i++) {
|
||
|
if (offset <= pos) {
|
||
|
sg[j].iov_base = src_sg[i].iov_base;
|
||
|
sg[j].iov_len = src_sg[i].iov_len;
|
||
|
j++;
|
||
|
} else if (offset < (src_sg[i].iov_len + pos)) {
|
||
|
sg[j].iov_base = src_sg[i].iov_base;
|
||
|
sg[j].iov_len = src_sg[i].iov_len;
|
||
|
sg[j].iov_base += (offset - pos);
|
||
|
sg[j].iov_len -= (offset - pos);
|
||
|
j++;
|
||
|
}
|
||
|
pos += src_sg[i].iov_len;
|
||
|
}
|
||
|
|
||
|
return j;
|
||
|
}
|
||
|
|
||
|
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
|
||
|
{
|
||
|
size_t old_offset = offset;
|
||
|
va_list ap;
|
||
|
int i;
|
||
|
|
||
|
va_start(ap, fmt);
|
||
|
for (i = 0; fmt[i]; i++) {
|
||
|
switch (fmt[i]) {
|
||
|
case 'b': {
|
||
|
uint8_t *valp = va_arg(ap, uint8_t *);
|
||
|
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
||
|
break;
|
||
|
}
|
||
|
case 'w': {
|
||
|
uint16_t val, *valp;
|
||
|
valp = va_arg(ap, uint16_t *);
|
||
|
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
||
|
*valp = le16_to_cpu(val);
|
||
|
break;
|
||
|
}
|
||
|
case 'd': {
|
||
|
uint32_t val, *valp;
|
||
|
valp = va_arg(ap, uint32_t *);
|
||
|
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
||
|
*valp = le32_to_cpu(val);
|
||
|
break;
|
||
|
}
|
||
|
case 'q': {
|
||
|
uint64_t val, *valp;
|
||
|
valp = va_arg(ap, uint64_t *);
|
||
|
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
||
|
*valp = le64_to_cpu(val);
|
||
|
break;
|
||
|
}
|
||
|
case 'v': {
|
||
|
struct iovec *iov = va_arg(ap, struct iovec *);
|
||
|
int *iovcnt = va_arg(ap, int *);
|
||
|
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
||
|
break;
|
||
|
}
|
||
|
case 's': {
|
||
|
V9fsString *str = va_arg(ap, V9fsString *);
|
||
|
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
||
|
/* FIXME: sanity check str->size */
|
||
|
str->data = qemu_malloc(str->size + 1);
|
||
|
offset += pdu_unpack(str->data, pdu, offset, str->size);
|
||
|
str->data[str->size] = 0;
|
||
|
break;
|
||
|
}
|
||
|
case 'Q': {
|
||
|
V9fsQID *qidp = va_arg(ap, V9fsQID *);
|
||
|
offset += pdu_unmarshal(pdu, offset, "bdq",
|
||
|
&qidp->type, &qidp->version, &qidp->path);
|
||
|
break;
|
||
|
}
|
||
|
case 'S': {
|
||
|
V9fsStat *statp = va_arg(ap, V9fsStat *);
|
||
|
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
||
|
&statp->size, &statp->type, &statp->dev,
|
||
|
&statp->qid, &statp->mode, &statp->atime,
|
||
|
&statp->mtime, &statp->length,
|
||
|
&statp->name, &statp->uid, &statp->gid,
|
||
|
&statp->muid, &statp->extension,
|
||
|
&statp->n_uid, &statp->n_gid,
|
||
|
&statp->n_muid);
|
||
|
break;
|
||
|
}
|
||
|
case 'I': {
|
||
|
V9fsIattr *iattr = va_arg(ap, V9fsIattr *);
|
||
|
offset += pdu_unmarshal(pdu, offset, "ddddqqqqq",
|
||
|
&iattr->valid, &iattr->mode,
|
||
|
&iattr->uid, &iattr->gid, &iattr->size,
|
||
|
&iattr->atime_sec, &iattr->atime_nsec,
|
||
|
&iattr->mtime_sec, &iattr->mtime_nsec);
|
||
|
break;
|
||
|
}
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
va_end(ap);
|
||
|
|
||
|
return offset - old_offset;
|
||
|
}
|
||
|
|
||
|
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
|
||
|
{
|
||
|
size_t old_offset = offset;
|
||
|
va_list ap;
|
||
|
int i;
|
||
|
|
||
|
va_start(ap, fmt);
|
||
|
for (i = 0; fmt[i]; i++) {
|
||
|
switch (fmt[i]) {
|
||
|
case 'b': {
|
||
|
uint8_t val = va_arg(ap, int);
|
||
|
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
||
|
break;
|
||
|
}
|
||
|
case 'w': {
|
||
|
uint16_t val;
|
||
|
cpu_to_le16w(&val, va_arg(ap, int));
|
||
|
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
||
|
break;
|
||
|
}
|
||
|
case 'd': {
|
||
|
uint32_t val;
|
||
|
cpu_to_le32w(&val, va_arg(ap, uint32_t));
|
||
|
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
||
|
break;
|
||
|
}
|
||
|
case 'q': {
|
||
|
uint64_t val;
|
||
|
cpu_to_le64w(&val, va_arg(ap, uint64_t));
|
||
|
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
||
|
break;
|
||
|
}
|
||
|
case 'v': {
|
||
|
struct iovec *iov = va_arg(ap, struct iovec *);
|
||
|
int *iovcnt = va_arg(ap, int *);
|
||
|
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
||
|
break;
|
||
|
}
|
||
|
case 's': {
|
||
|
V9fsString *str = va_arg(ap, V9fsString *);
|
||
|
offset += pdu_marshal(pdu, offset, "w", str->size);
|
||
|
offset += pdu_pack(pdu, offset, str->data, str->size);
|
||
|
break;
|
||
|
}
|
||
|
case 'Q': {
|
||
|
V9fsQID *qidp = va_arg(ap, V9fsQID *);
|
||
|
offset += pdu_marshal(pdu, offset, "bdq",
|
||
|
qidp->type, qidp->version, qidp->path);
|
||
|
break;
|
||
|
}
|
||
|
case 'S': {
|
||
|
V9fsStat *statp = va_arg(ap, V9fsStat *);
|
||
|
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
||
|
statp->size, statp->type, statp->dev,
|
||
|
&statp->qid, statp->mode, statp->atime,
|
||
|
statp->mtime, statp->length, &statp->name,
|
||
|
&statp->uid, &statp->gid, &statp->muid,
|
||
|
&statp->extension, statp->n_uid,
|
||
|
statp->n_gid, statp->n_muid);
|
||
|
break;
|
||
|
}
|
||
|
case 'A': {
|
||
|
V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *);
|
||
|
offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq",
|
||
|
statp->st_result_mask,
|
||
|
&statp->qid, statp->st_mode,
|
||
|
statp->st_uid, statp->st_gid,
|
||
|
statp->st_nlink, statp->st_rdev,
|
||
|
statp->st_size, statp->st_blksize, statp->st_blocks,
|
||
|
statp->st_atime_sec, statp->st_atime_nsec,
|
||
|
statp->st_mtime_sec, statp->st_mtime_nsec,
|
||
|
statp->st_ctime_sec, statp->st_ctime_nsec,
|
||
|
statp->st_btime_sec, statp->st_btime_nsec,
|
||
|
statp->st_gen, statp->st_data_version);
|
||
|
break;
|
||
|
}
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
va_end(ap);
|
||
|
|
||
|
return offset - old_offset;
|
||
|
}
|
||
|
|
||
|
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len)
|
||
|
{
|
||
|
int8_t id = pdu->id + 1; /* Response */
|
||
|
|
||
|
if (len < 0) {
|
||
|
int err = -len;
|
||
|
len = 7;
|
||
|
|
||
|
if (s->proto_version != V9FS_PROTO_2000L) {
|
||
|
V9fsString str;
|
||
|
|
||
|
str.data = strerror(err);
|
||
|
str.size = strlen(str.data);
|
||
|
|
||
|
len += pdu_marshal(pdu, len, "s", &str);
|
||
|
id = P9_RERROR;
|
||
|
}
|
||
|
|
||
|
len += pdu_marshal(pdu, len, "d", err);
|
||
|
|
||
|
if (s->proto_version == V9FS_PROTO_2000L) {
|
||
|
id = P9_RLERROR;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* fill out the header */
|
||
|
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag);
|
||
|
|
||
|
/* keep these in sync */
|
||
|
pdu->size = len;
|
||
|
pdu->id = id;
|
||
|
|
||
|
/* push onto queue and notify */
|
||
|
virtqueue_push(s->vq, &pdu->elem, len);
|
||
|
|
||
|
/* FIXME: we should batch these completions */
|
||
|
virtio_notify(&s->vdev, s->vq);
|
||
|
|
||
|
free_pdu(s, pdu);
|
||
|
}
|
||
|
|
||
|
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
||
|
{
|
||
|
mode_t ret;
|
||
|
|
||
|
ret = mode & 0777;
|
||
|
if (mode & P9_STAT_MODE_DIR) {
|
||
|
ret |= S_IFDIR;
|
||
|
}
|
||
|
|
||
|
if (mode & P9_STAT_MODE_SYMLINK) {
|
||
|
ret |= S_IFLNK;
|
||
|
}
|
||
|
if (mode & P9_STAT_MODE_SOCKET) {
|
||
|
ret |= S_IFSOCK;
|
||
|
}
|
||
|
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
||
|
ret |= S_IFIFO;
|
||
|
}
|
||
|
if (mode & P9_STAT_MODE_DEVICE) {
|
||
|
if (extension && extension->data[0] == 'c') {
|
||
|
ret |= S_IFCHR;
|
||
|
} else {
|
||
|
ret |= S_IFBLK;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (!(ret&~0777)) {
|
||
|
ret |= S_IFREG;
|
||
|
}
|
||
|
|
||
|
if (mode & P9_STAT_MODE_SETUID) {
|
||
|
ret |= S_ISUID;
|
||
|
}
|
||
|
if (mode & P9_STAT_MODE_SETGID) {
|
||
|
ret |= S_ISGID;
|
||
|
}
|
||
|
if (mode & P9_STAT_MODE_SETVTX) {
|
||
|
ret |= S_ISVTX;
|
||
|
}
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int donttouch_stat(V9fsStat *stat)
|
||
|
{
|
||
|
if (stat->type == -1 &&
|
||
|
stat->dev == -1 &&
|
||
|
stat->qid.type == -1 &&
|
||
|
stat->qid.version == -1 &&
|
||
|
stat->qid.path == -1 &&
|
||
|
stat->mode == -1 &&
|
||
|
stat->atime == -1 &&
|
||
|
stat->mtime == -1 &&
|
||
|
stat->length == -1 &&
|
||
|
!stat->name.size &&
|
||
|
!stat->uid.size &&
|
||
|
!stat->gid.size &&
|
||
|
!stat->muid.size &&
|
||
|
stat->n_uid == -1 &&
|
||
|
stat->n_gid == -1 &&
|
||
|
stat->n_muid == -1) {
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void v9fs_stat_free(V9fsStat *stat)
|
||
|
{
|
||
|
v9fs_string_free(&stat->name);
|
||
|
v9fs_string_free(&stat->uid);
|
||
|
v9fs_string_free(&stat->gid);
|
||
|
v9fs_string_free(&stat->muid);
|
||
|
v9fs_string_free(&stat->extension);
|
||
|
}
|
||
|
|
||
|
static uint32_t stat_to_v9mode(const struct stat *stbuf)
|
||
|
{
|
||
|
uint32_t mode;
|
||
|
|
||
|
mode = stbuf->st_mode & 0777;
|
||
|
if (S_ISDIR(stbuf->st_mode)) {
|
||
|
mode |= P9_STAT_MODE_DIR;
|
||
|
}
|
||
|
|
||
|
if (S_ISLNK(stbuf->st_mode)) {
|
||
|
mode |= P9_STAT_MODE_SYMLINK;
|
||
|
}
|
||
|
|
||
|
if (S_ISSOCK(stbuf->st_mode)) {
|
||
|
mode |= P9_STAT_MODE_SOCKET;
|
||
|
}
|
||
|
|
||
|
if (S_ISFIFO(stbuf->st_mode)) {
|
||
|
mode |= P9_STAT_MODE_NAMED_PIPE;
|
||
|
}
|
||
|
|
||
|
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
||
|
mode |= P9_STAT_MODE_DEVICE;
|
||
|
}
|
||
|
|
||
|
if (stbuf->st_mode & S_ISUID) {
|
||
|
mode |= P9_STAT_MODE_SETUID;
|
||
|
}
|
||
|
|
||
|
if (stbuf->st_mode & S_ISGID) {
|
||
|
mode |= P9_STAT_MODE_SETGID;
|
||
|
}
|
||
|
|
||
|
if (stbuf->st_mode & S_ISVTX) {
|
||
|
mode |= P9_STAT_MODE_SETVTX;
|
||
|
}
|
||
|
|
||
|
return mode;
|
||
|
}
|
||
|
|
||
|
static int stat_to_v9stat(V9fsState *s, V9fsString *name,
|
||
|
const struct stat *stbuf,
|
||
|
V9fsStat *v9stat)
|
||
|
{
|
||
|
int err;
|
||
|
const char *str;
|
||
|
|
||
|
memset(v9stat, 0, sizeof(*v9stat));
|
||
|
|
||
|
stat_to_qid(stbuf, &v9stat->qid);
|
||
|
v9stat->mode = stat_to_v9mode(stbuf);
|
||
|
v9stat->atime = stbuf->st_atime;
|
||
|
v9stat->mtime = stbuf->st_mtime;
|
||
|
v9stat->length = stbuf->st_size;
|
||
|
|
||
|
v9fs_string_null(&v9stat->uid);
|
||
|
v9fs_string_null(&v9stat->gid);
|
||
|
v9fs_string_null(&v9stat->muid);
|
||
|
|
||
|
v9stat->n_uid = stbuf->st_uid;
|
||
|
v9stat->n_gid = stbuf->st_gid;
|
||
|
v9stat->n_muid = 0;
|
||
|
|
||
|
v9fs_string_null(&v9stat->extension);
|
||
|
|
||
|
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
||
|
err = v9fs_do_readlink(s, name, &v9stat->extension);
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
return err;
|
||
|
}
|
||
|
v9stat->extension.data[err] = 0;
|
||
|
v9stat->extension.size = err;
|
||
|
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) {
|
||
|
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
||
|
S_ISCHR(stbuf->st_mode) ? 'c' : 'b',
|
||
|
major(stbuf->st_rdev), minor(stbuf->st_rdev));
|
||
|
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) {
|
||
|
v9fs_string_sprintf(&v9stat->extension, "%s %lu",
|
||
|
"HARDLINKCOUNT", (unsigned long)stbuf->st_nlink);
|
||
|
}
|
||
|
|
||
|
str = strrchr(name->data, '/');
|
||
|
if (str) {
|
||
|
str += 1;
|
||
|
} else {
|
||
|
str = name->data;
|
||
|
}
|
||
|
|
||
|
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
||
|
|
||
|
v9stat->size = 61 +
|
||
|
v9fs_string_size(&v9stat->name) +
|
||
|
v9fs_string_size(&v9stat->uid) +
|
||
|
v9fs_string_size(&v9stat->gid) +
|
||
|
v9fs_string_size(&v9stat->muid) +
|
||
|
v9fs_string_size(&v9stat->extension);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
#define P9_STATS_MODE 0x00000001ULL
|
||
|
#define P9_STATS_NLINK 0x00000002ULL
|
||
|
#define P9_STATS_UID 0x00000004ULL
|
||
|
#define P9_STATS_GID 0x00000008ULL
|
||
|
#define P9_STATS_RDEV 0x00000010ULL
|
||
|
#define P9_STATS_ATIME 0x00000020ULL
|
||
|
#define P9_STATS_MTIME 0x00000040ULL
|
||
|
#define P9_STATS_CTIME 0x00000080ULL
|
||
|
#define P9_STATS_INO 0x00000100ULL
|
||
|
#define P9_STATS_SIZE 0x00000200ULL
|
||
|
#define P9_STATS_BLOCKS 0x00000400ULL
|
||
|
|
||
|
#define P9_STATS_BTIME 0x00000800ULL
|
||
|
#define P9_STATS_GEN 0x00001000ULL
|
||
|
#define P9_STATS_DATA_VERSION 0x00002000ULL
|
||
|
|
||
|
#define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */
|
||
|
#define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */
|
||
|
|
||
|
|
||
|
static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf,
|
||
|
V9fsStatDotl *v9lstat)
|
||
|
{
|
||
|
memset(v9lstat, 0, sizeof(*v9lstat));
|
||
|
|
||
|
v9lstat->st_mode = stbuf->st_mode;
|
||
|
v9lstat->st_nlink = stbuf->st_nlink;
|
||
|
v9lstat->st_uid = stbuf->st_uid;
|
||
|
v9lstat->st_gid = stbuf->st_gid;
|
||
|
v9lstat->st_rdev = stbuf->st_rdev;
|
||
|
v9lstat->st_size = stbuf->st_size;
|
||
|
v9lstat->st_blksize = stbuf->st_blksize;
|
||
|
v9lstat->st_blocks = stbuf->st_blocks;
|
||
|
v9lstat->st_atime_sec = stbuf->st_atime;
|
||
|
v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec;
|
||
|
v9lstat->st_mtime_sec = stbuf->st_mtime;
|
||
|
v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec;
|
||
|
v9lstat->st_ctime_sec = stbuf->st_ctime;
|
||
|
v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec;
|
||
|
/* Currently we only support BASIC fields in stat */
|
||
|
v9lstat->st_result_mask = P9_STATS_BASIC;
|
||
|
|
||
|
stat_to_qid(stbuf, &v9lstat->qid);
|
||
|
}
|
||
|
|
||
|
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt)
|
||
|
{
|
||
|
while (len && *iovcnt) {
|
||
|
if (len < sg->iov_len) {
|
||
|
sg->iov_len -= len;
|
||
|
sg->iov_base += len;
|
||
|
len = 0;
|
||
|
} else {
|
||
|
len -= sg->iov_len;
|
||
|
sg++;
|
||
|
*iovcnt -= 1;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return sg;
|
||
|
}
|
||
|
|
||
|
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt)
|
||
|
{
|
||
|
int i;
|
||
|
int total = 0;
|
||
|
|
||
|
for (i = 0; i < *cnt; i++) {
|
||
|
if ((total + sg[i].iov_len) > cap) {
|
||
|
sg[i].iov_len -= ((total + sg[i].iov_len) - cap);
|
||
|
i++;
|
||
|
break;
|
||
|
}
|
||
|
total += sg[i].iov_len;
|
||
|
}
|
||
|
|
||
|
*cnt = i;
|
||
|
|
||
|
return sg;
|
||
|
}
|
||
|
|
||
|
static void print_sg(struct iovec *sg, int cnt)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
printf("sg[%d]: {", cnt);
|
||
|
for (i = 0; i < cnt; i++) {
|
||
|
if (i) {
|
||
|
printf(", ");
|
||
|
}
|
||
|
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
||
|
}
|
||
|
printf("}\n");
|
||
|
}
|
||
|
|
||
|
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len)
|
||
|
{
|
||
|
V9fsString str;
|
||
|
v9fs_string_init(&str);
|
||
|
v9fs_string_copy(&str, dst);
|
||
|
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
||
|
v9fs_string_free(&str);
|
||
|
}
|
||
|
|
||
|
static void v9fs_version(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
V9fsString version;
|
||
|
size_t offset = 7;
|
||
|
|
||
|
pdu_unmarshal(pdu, offset, "ds", &s->msize, &version);
|
||
|
|
||
|
if (!strcmp(version.data, "9P2000.u")) {
|
||
|
s->proto_version = V9FS_PROTO_2000U;
|
||
|
} else if (!strcmp(version.data, "9P2000.L")) {
|
||
|
s->proto_version = V9FS_PROTO_2000L;
|
||
|
} else {
|
||
|
v9fs_string_sprintf(&version, "unknown");
|
||
|
}
|
||
|
|
||
|
offset += pdu_marshal(pdu, offset, "ds", s->msize, &version);
|
||
|
complete_pdu(s, pdu, offset);
|
||
|
|
||
|
v9fs_string_free(&version);
|
||
|
}
|
||
|
|
||
|
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid, afid, n_uname;
|
||
|
V9fsString uname, aname;
|
||
|
V9fsFidState *fidp;
|
||
|
V9fsQID qid;
|
||
|
size_t offset = 7;
|
||
|
ssize_t err;
|
||
|
|
||
|
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
||
|
|
||
|
fidp = alloc_fid(s, fid);
|
||
|
if (fidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
fidp->uid = n_uname;
|
||
|
|
||
|
v9fs_string_sprintf(&fidp->path, "%s", "/");
|
||
|
err = fid_to_qid(s, fidp, &qid);
|
||
|
if (err) {
|
||
|
err = -EINVAL;
|
||
|
free_fid(s, fid);
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
||
|
|
||
|
err = offset;
|
||
|
out:
|
||
|
complete_pdu(s, pdu, err);
|
||
|
v9fs_string_free(&uname);
|
||
|
v9fs_string_free(&aname);
|
||
|
}
|
||
|
|
||
|
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat);
|
||
|
if (err) {
|
||
|
goto out;
|
||
|
}
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat);
|
||
|
err = vs->offset;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsStatState *vs;
|
||
|
ssize_t err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
memset(&vs->v9stat, 0, sizeof(vs->v9stat));
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
||
|
v9fs_stat_post_lstat(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl);
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl);
|
||
|
err = vs->offset;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsStatStateDotl *vs;
|
||
|
ssize_t err = 0;
|
||
|
V9fsFidState *fidp;
|
||
|
uint64_t request_mask;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl));
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask);
|
||
|
|
||
|
fidp = lookup_fid(s, fid);
|
||
|
if (fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* Currently we only support BASIC fields in stat, so there is no
|
||
|
* need to look at request_mask.
|
||
|
*/
|
||
|
err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf);
|
||
|
v9fs_getattr_post_lstat(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
/* From Linux kernel code */
|
||
|
#define ATTR_MODE (1 << 0)
|
||
|
#define ATTR_UID (1 << 1)
|
||
|
#define ATTR_GID (1 << 2)
|
||
|
#define ATTR_SIZE (1 << 3)
|
||
|
#define ATTR_ATIME (1 << 4)
|
||
|
#define ATTR_MTIME (1 << 5)
|
||
|
#define ATTR_CTIME (1 << 6)
|
||
|
#define ATTR_MASK 127
|
||
|
#define ATTR_ATIME_SET (1 << 7)
|
||
|
#define ATTR_MTIME_SET (1 << 8)
|
||
|
|
||
|
static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
err = vs->offset;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->v9iattr.valid & (ATTR_SIZE)) {
|
||
|
err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size);
|
||
|
}
|
||
|
v9fs_setattr_post_truncate(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* If the only valid entry in iattr is ctime we can call
|
||
|
* chown(-1,-1) to update the ctime of the file
|
||
|
*/
|
||
|
if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) ||
|
||
|
((vs->v9iattr.valid & ATTR_CTIME)
|
||
|
&& !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) {
|
||
|
if (!(vs->v9iattr.valid & ATTR_UID)) {
|
||
|
vs->v9iattr.uid = -1;
|
||
|
}
|
||
|
if (!(vs->v9iattr.valid & ATTR_GID)) {
|
||
|
vs->v9iattr.gid = -1;
|
||
|
}
|
||
|
err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid,
|
||
|
vs->v9iattr.gid);
|
||
|
}
|
||
|
v9fs_setattr_post_chown(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) {
|
||
|
struct timespec times[2];
|
||
|
if (vs->v9iattr.valid & ATTR_ATIME) {
|
||
|
if (vs->v9iattr.valid & ATTR_ATIME_SET) {
|
||
|
times[0].tv_sec = vs->v9iattr.atime_sec;
|
||
|
times[0].tv_nsec = vs->v9iattr.atime_nsec;
|
||
|
} else {
|
||
|
times[0].tv_nsec = UTIME_NOW;
|
||
|
}
|
||
|
} else {
|
||
|
times[0].tv_nsec = UTIME_OMIT;
|
||
|
}
|
||
|
|
||
|
if (vs->v9iattr.valid & ATTR_MTIME) {
|
||
|
if (vs->v9iattr.valid & ATTR_MTIME_SET) {
|
||
|
times[1].tv_sec = vs->v9iattr.mtime_sec;
|
||
|
times[1].tv_nsec = vs->v9iattr.mtime_nsec;
|
||
|
} else {
|
||
|
times[1].tv_nsec = UTIME_NOW;
|
||
|
}
|
||
|
} else {
|
||
|
times[1].tv_nsec = UTIME_OMIT;
|
||
|
}
|
||
|
err = v9fs_do_utimensat(s, &vs->fidp->path, times);
|
||
|
}
|
||
|
v9fs_setattr_post_utimensat(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsSetattrState *vs;
|
||
|
int err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->v9iattr.valid & ATTR_MODE) {
|
||
|
err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode);
|
||
|
}
|
||
|
|
||
|
v9fs_setattr_post_chmod(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err)
|
||
|
{
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
|
||
|
if (vs->nwnames) {
|
||
|
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) {
|
||
|
v9fs_string_free(&vs->wnames[vs->name_idx]);
|
||
|
}
|
||
|
|
||
|
qemu_free(vs->wnames);
|
||
|
qemu_free(vs->qids);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void v9fs_walk_marshal(V9fsWalkState *vs)
|
||
|
{
|
||
|
int i;
|
||
|
vs->offset = 7;
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
||
|
|
||
|
for (i = 0; i < vs->nwnames; i++) {
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
free_fid(s, vs->newfidp->fid);
|
||
|
v9fs_string_free(&vs->path);
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
|
||
|
|
||
|
vs->name_idx++;
|
||
|
if (vs->name_idx < vs->nwnames) {
|
||
|
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
||
|
vs->wnames[vs->name_idx].data);
|
||
|
v9fs_string_copy(&vs->newfidp->path, &vs->path);
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
|
||
|
v9fs_walk_post_newfid_lstat(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
v9fs_string_free(&vs->path);
|
||
|
v9fs_walk_marshal(vs);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
v9fs_walk_complete(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
v9fs_string_free(&vs->path);
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
|
||
|
vs->name_idx++;
|
||
|
if (vs->name_idx < vs->nwnames) {
|
||
|
|
||
|
v9fs_string_sprintf(&vs->path, "%s/%s",
|
||
|
vs->fidp->path.data, vs->wnames[vs->name_idx].data);
|
||
|
v9fs_string_copy(&vs->fidp->path, &vs->path);
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
||
|
v9fs_walk_post_oldfid_lstat(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
v9fs_string_free(&vs->path);
|
||
|
v9fs_walk_marshal(vs);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
v9fs_walk_complete(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid, newfid;
|
||
|
V9fsWalkState *vs;
|
||
|
int err = 0;
|
||
|
int i;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->wnames = NULL;
|
||
|
vs->qids = NULL;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
||
|
&newfid, &vs->nwnames);
|
||
|
|
||
|
if (vs->nwnames) {
|
||
|
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames);
|
||
|
|
||
|
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames);
|
||
|
|
||
|
for (i = 0; i < vs->nwnames; i++) {
|
||
|
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
||
|
&vs->wnames[i]);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* FIXME: is this really valid? */
|
||
|
if (fid == newfid) {
|
||
|
|
||
|
BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
|
||
|
v9fs_string_init(&vs->path);
|
||
|
vs->name_idx = 0;
|
||
|
|
||
|
if (vs->name_idx < vs->nwnames) {
|
||
|
v9fs_string_sprintf(&vs->path, "%s/%s",
|
||
|
vs->fidp->path.data, vs->wnames[vs->name_idx].data);
|
||
|
v9fs_string_copy(&vs->fidp->path, &vs->path);
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
||
|
v9fs_walk_post_oldfid_lstat(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
} else {
|
||
|
vs->newfidp = alloc_fid(s, newfid);
|
||
|
if (vs->newfidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
vs->newfidp->uid = vs->fidp->uid;
|
||
|
v9fs_string_init(&vs->path);
|
||
|
vs->name_idx = 0;
|
||
|
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path);
|
||
|
|
||
|
if (vs->name_idx < vs->nwnames) {
|
||
|
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
||
|
vs->wnames[vs->name_idx].data);
|
||
|
v9fs_string_copy(&vs->newfidp->path, &vs->path);
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
|
||
|
v9fs_walk_post_newfid_lstat(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
v9fs_walk_marshal(vs);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
v9fs_walk_complete(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static int32_t get_iounit(V9fsState *s, V9fsString *name)
|
||
|
{
|
||
|
struct statfs stbuf;
|
||
|
int32_t iounit = 0;
|
||
|
|
||
|
/*
|
||
|
* iounit should be multiples of f_bsize (host filesystem block size
|
||
|
* and as well as less than (client msize - P9_IOHDRSZ))
|
||
|
*/
|
||
|
if (!v9fs_do_statfs(s, name, &stbuf)) {
|
||
|
iounit = stbuf.f_bsize;
|
||
|
iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize;
|
||
|
}
|
||
|
|
||
|
if (!iounit) {
|
||
|
iounit = s->msize - P9_IOHDRSZ;
|
||
|
}
|
||
|
return iounit;
|
||
|
}
|
||
|
|
||
|
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err)
|
||
|
{
|
||
|
if (vs->fidp->fs.dir == NULL) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->fidp->fid_type = P9_FID_DIR;
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
|
||
|
}
|
||
|
|
||
|
static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs)
|
||
|
{
|
||
|
int err;
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
||
|
err = vs->offset;
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err)
|
||
|
{
|
||
|
if (vs->fidp->fs.fd == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->fidp->fid_type = P9_FID_FILE;
|
||
|
vs->iounit = get_iounit(s, &vs->fidp->path);
|
||
|
v9fs_open_post_getiounit(s, vs);
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err)
|
||
|
{
|
||
|
int flags;
|
||
|
|
||
|
if (err) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
stat_to_qid(&vs->stbuf, &vs->qid);
|
||
|
|
||
|
if (S_ISDIR(vs->stbuf.st_mode)) {
|
||
|
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path);
|
||
|
v9fs_open_post_opendir(s, vs, err);
|
||
|
} else {
|
||
|
if (s->proto_version == V9FS_PROTO_2000L) {
|
||
|
flags = vs->mode;
|
||
|
flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT);
|
||
|
/* Ignore direct disk access hint until the server supports it. */
|
||
|
flags &= ~O_DIRECT;
|
||
|
} else {
|
||
|
flags = omode_to_uflags(vs->mode);
|
||
|
}
|
||
|
vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags);
|
||
|
v9fs_open_post_open(s, vs, err);
|
||
|
}
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_open(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsOpenState *vs;
|
||
|
ssize_t err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
vs->mode = 0;
|
||
|
|
||
|
if (s->proto_version == V9FS_PROTO_2000L) {
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode);
|
||
|
} else {
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
||
|
}
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
||
|
|
||
|
v9fs_open_post_lstat(s, vs, err);
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err)
|
||
|
{
|
||
|
if (err == 0) {
|
||
|
v9fs_string_copy(&vs->fidp->path, &vs->fullname);
|
||
|
stat_to_qid(&vs->stbuf, &vs->qid);
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid,
|
||
|
&vs->iounit);
|
||
|
err = vs->offset;
|
||
|
} else {
|
||
|
vs->fidp->fid_type = P9_FID_NONE;
|
||
|
err = -errno;
|
||
|
if (vs->fidp->fs.fd > 0) {
|
||
|
close(vs->fidp->fs.fd);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
|
||
|
|
||
|
out:
|
||
|
v9fs_post_lcreate(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (vs->fidp->fs.fd == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->fidp->fid_type = P9_FID_FILE;
|
||
|
vs->iounit = get_iounit(s, &vs->fullname);
|
||
|
v9fs_lcreate_post_get_iounit(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_post_lcreate(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t dfid, flags, mode;
|
||
|
gid_t gid;
|
||
|
V9fsLcreateState *vs;
|
||
|
ssize_t err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
v9fs_string_init(&vs->fullname);
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags,
|
||
|
&mode, &gid);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, dfid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
||
|
vs->name.data);
|
||
|
|
||
|
/* Ignore direct disk access hint until the server supports it. */
|
||
|
flags &= ~O_DIRECT;
|
||
|
|
||
|
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
|
||
|
gid, flags, mode);
|
||
|
v9fs_lcreate_post_do_open2(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
complete_pdu(s, pdu, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_fsync(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
size_t offset = 7;
|
||
|
V9fsFidState *fidp;
|
||
|
int datasync;
|
||
|
int err;
|
||
|
|
||
|
pdu_unmarshal(pdu, offset, "dd", &fid, &datasync);
|
||
|
fidp = lookup_fid(s, fid);
|
||
|
if (fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
v9fs_post_do_fsync(s, pdu, err);
|
||
|
return;
|
||
|
}
|
||
|
err = v9fs_do_fsync(s, fidp->fs.fd, datasync);
|
||
|
v9fs_post_do_fsync(s, pdu, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
size_t offset = 7;
|
||
|
int err;
|
||
|
|
||
|
pdu_unmarshal(pdu, offset, "d", &fid);
|
||
|
|
||
|
err = free_fid(s, fid);
|
||
|
if (err < 0) {
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
offset = 7;
|
||
|
err = offset;
|
||
|
out:
|
||
|
complete_pdu(s, pdu, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t);
|
||
|
|
||
|
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
|
||
|
{
|
||
|
if (err) {
|
||
|
goto out;
|
||
|
}
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
||
|
vs->offset += vs->count;
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs,
|
||
|
ssize_t err)
|
||
|
{
|
||
|
if (err) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat);
|
||
|
if (err) {
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S",
|
||
|
&vs->v9stat);
|
||
|
if ((vs->len != (vs->v9stat.size + 2)) ||
|
||
|
((vs->count + vs->len) > vs->max_count)) {
|
||
|
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
|
||
|
v9fs_read_post_seekdir(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
vs->count += vs->len;
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
vs->dir_pos = vs->dent->d_off;
|
||
|
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
|
||
|
v9fs_read_post_readdir(s, vs, err);
|
||
|
return;
|
||
|
out:
|
||
|
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos);
|
||
|
v9fs_read_post_seekdir(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
}
|
||
|
|
||
|
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
|
||
|
{
|
||
|
if (vs->dent) {
|
||
|
memset(&vs->v9stat, 0, sizeof(vs->v9stat));
|
||
|
v9fs_string_init(&vs->name);
|
||
|
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
||
|
vs->dent->d_name);
|
||
|
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf);
|
||
|
v9fs_read_post_dir_lstat(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
||
|
vs->offset += vs->count;
|
||
|
err = vs->offset;
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err)
|
||
|
{
|
||
|
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
|
||
|
v9fs_read_post_readdir(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs,
|
||
|
ssize_t err)
|
||
|
{
|
||
|
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
|
||
|
v9fs_read_post_telldir(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
/* IO error return the error */
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->total += vs->len;
|
||
|
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
|
||
|
if (vs->total < vs->count && vs->len > 0) {
|
||
|
do {
|
||
|
if (0) {
|
||
|
print_sg(vs->sg, vs->cnt);
|
||
|
}
|
||
|
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
|
||
|
vs->off);
|
||
|
if (vs->len > 0) {
|
||
|
vs->off += vs->len;
|
||
|
}
|
||
|
} while (vs->len == -1 && errno == EINTR);
|
||
|
if (vs->len == -1) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
v9fs_read_post_preadv(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
||
|
vs->offset += vs->count;
|
||
|
err = vs->offset;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs)
|
||
|
{
|
||
|
ssize_t err = 0;
|
||
|
int read_count;
|
||
|
int64_t xattr_len;
|
||
|
|
||
|
xattr_len = vs->fidp->fs.xattr.len;
|
||
|
read_count = xattr_len - vs->off;
|
||
|
if (read_count > vs->count) {
|
||
|
read_count = vs->count;
|
||
|
} else if (read_count < 0) {
|
||
|
/*
|
||
|
* read beyond XATTR value
|
||
|
*/
|
||
|
read_count = 0;
|
||
|
}
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count);
|
||
|
vs->offset += pdu_pack(vs->pdu, vs->offset,
|
||
|
((char *)vs->fidp->fs.xattr.value) + vs->off,
|
||
|
read_count);
|
||
|
err = vs->offset;
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_read(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsReadState *vs;
|
||
|
ssize_t err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
vs->total = 0;
|
||
|
vs->len = 0;
|
||
|
vs->count = 0;
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->fidp->fid_type == P9_FID_DIR) {
|
||
|
vs->max_count = vs->count;
|
||
|
vs->count = 0;
|
||
|
if (vs->off == 0) {
|
||
|
v9fs_do_rewinddir(s, vs->fidp->fs.dir);
|
||
|
}
|
||
|
v9fs_read_post_rewinddir(s, vs, err);
|
||
|
return;
|
||
|
} else if (vs->fidp->fid_type == P9_FID_FILE) {
|
||
|
vs->sg = vs->iov;
|
||
|
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt);
|
||
|
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
|
||
|
if (vs->total <= vs->count) {
|
||
|
vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
|
||
|
vs->off);
|
||
|
if (vs->len > 0) {
|
||
|
vs->off += vs->len;
|
||
|
}
|
||
|
err = vs->len;
|
||
|
v9fs_read_post_preadv(s, vs, err);
|
||
|
}
|
||
|
return;
|
||
|
} else if (vs->fidp->fid_type == P9_FID_XATTR) {
|
||
|
v9fs_xattr_read(s, vs);
|
||
|
return;
|
||
|
} else {
|
||
|
err = -EINVAL;
|
||
|
}
|
||
|
out:
|
||
|
complete_pdu(s, pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
typedef struct V9fsReadDirState {
|
||
|
V9fsPDU *pdu;
|
||
|
V9fsFidState *fidp;
|
||
|
V9fsQID qid;
|
||
|
off_t saved_dir_pos;
|
||
|
struct dirent *dent;
|
||
|
int32_t count;
|
||
|
int32_t max_count;
|
||
|
size_t offset;
|
||
|
int64_t initial_offset;
|
||
|
V9fsString name;
|
||
|
} V9fsReadDirState;
|
||
|
|
||
|
static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs)
|
||
|
{
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
||
|
vs->offset += vs->count;
|
||
|
complete_pdu(s, vs->pdu, vs->offset);
|
||
|
qemu_free(vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
/* Size of each dirent on the wire: size of qid (13) + size of offset (8)
|
||
|
* size of type (1) + size of name.size (2) + strlen(name.data)
|
||
|
*/
|
||
|
#define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data))
|
||
|
|
||
|
static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs)
|
||
|
{
|
||
|
int len;
|
||
|
size_t size;
|
||
|
|
||
|
if (vs->dent) {
|
||
|
v9fs_string_init(&vs->name);
|
||
|
v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name);
|
||
|
|
||
|
if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) {
|
||
|
/* Ran out of buffer. Set dir back to old position and return */
|
||
|
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos);
|
||
|
v9fs_readdir_post_seekdir(s, vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
/* Fill up just the path field of qid because the client uses
|
||
|
* only that. To fill the entire qid structure we will have
|
||
|
* to stat each dirent found, which is expensive
|
||
|
*/
|
||
|
size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path));
|
||
|
memcpy(&vs->qid.path, &vs->dent->d_ino, size);
|
||
|
/* Fill the other fields with dummy values */
|
||
|
vs->qid.type = 0;
|
||
|
vs->qid.version = 0;
|
||
|
|
||
|
len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs",
|
||
|
&vs->qid, vs->dent->d_off,
|
||
|
vs->dent->d_type, &vs->name);
|
||
|
vs->count += len;
|
||
|
v9fs_string_free(&vs->name);
|
||
|
vs->saved_dir_pos = vs->dent->d_off;
|
||
|
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
|
||
|
v9fs_readdir_post_readdir(s, vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
||
|
vs->offset += vs->count;
|
||
|
complete_pdu(s, vs->pdu, vs->offset);
|
||
|
qemu_free(vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs)
|
||
|
{
|
||
|
vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir);
|
||
|
v9fs_readdir_post_readdir(s, vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs)
|
||
|
{
|
||
|
vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir);
|
||
|
v9fs_readdir_post_telldir(s, vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsReadDirState *vs;
|
||
|
ssize_t err = 0;
|
||
|
size_t offset = 7;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
vs->count = 0;
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset,
|
||
|
&vs->max_count);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL || !(vs->fidp->fs.dir)) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->initial_offset == 0) {
|
||
|
v9fs_do_rewinddir(s, vs->fidp->fs.dir);
|
||
|
} else {
|
||
|
v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset);
|
||
|
}
|
||
|
|
||
|
v9fs_readdir_post_setdir(s, vs);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, pdu, err);
|
||
|
qemu_free(vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs,
|
||
|
ssize_t err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
/* IO error return the error */
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->total += vs->len;
|
||
|
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
|
||
|
if (vs->total < vs->count && vs->len > 0) {
|
||
|
do {
|
||
|
if (0) {
|
||
|
print_sg(vs->sg, vs->cnt);
|
||
|
}
|
||
|
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt,
|
||
|
vs->off);
|
||
|
if (vs->len > 0) {
|
||
|
vs->off += vs->len;
|
||
|
}
|
||
|
} while (vs->len == -1 && errno == EINTR);
|
||
|
if (vs->len == -1) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
v9fs_write_post_pwritev(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs)
|
||
|
{
|
||
|
int i, to_copy;
|
||
|
ssize_t err = 0;
|
||
|
int write_count;
|
||
|
int64_t xattr_len;
|
||
|
|
||
|
xattr_len = vs->fidp->fs.xattr.len;
|
||
|
write_count = xattr_len - vs->off;
|
||
|
if (write_count > vs->count) {
|
||
|
write_count = vs->count;
|
||
|
} else if (write_count < 0) {
|
||
|
/*
|
||
|
* write beyond XATTR value len specified in
|
||
|
* xattrcreate
|
||
|
*/
|
||
|
err = -ENOSPC;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count);
|
||
|
err = vs->offset;
|
||
|
vs->fidp->fs.xattr.copied_len += write_count;
|
||
|
/*
|
||
|
* Now copy the content from sg list
|
||
|
*/
|
||
|
for (i = 0; i < vs->cnt; i++) {
|
||
|
if (write_count > vs->sg[i].iov_len) {
|
||
|
to_copy = vs->sg[i].iov_len;
|
||
|
} else {
|
||
|
to_copy = write_count;
|
||
|
}
|
||
|
memcpy((char *)vs->fidp->fs.xattr.value + vs->off,
|
||
|
vs->sg[i].iov_base, to_copy);
|
||
|
/* updating vs->off since we are not using below */
|
||
|
vs->off += to_copy;
|
||
|
write_count -= to_copy;
|
||
|
}
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_write(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsWriteState *vs;
|
||
|
ssize_t err;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
vs->sg = vs->iov;
|
||
|
vs->total = 0;
|
||
|
vs->len = 0;
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
||
|
vs->sg, &vs->cnt);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->fidp->fid_type == P9_FID_FILE) {
|
||
|
if (vs->fidp->fs.fd == -1) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
} else if (vs->fidp->fid_type == P9_FID_XATTR) {
|
||
|
/*
|
||
|
* setxattr operation
|
||
|
*/
|
||
|
v9fs_xattr_write(s, vs);
|
||
|
return;
|
||
|
} else {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
|
||
|
if (vs->total <= vs->count) {
|
||
|
vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off);
|
||
|
if (vs->len > 0) {
|
||
|
vs->off += vs->len;
|
||
|
}
|
||
|
err = vs->len;
|
||
|
v9fs_write_post_pwritev(s, vs, err);
|
||
|
}
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs)
|
||
|
{
|
||
|
int err;
|
||
|
v9fs_string_copy(&vs->fidp->path, &vs->fullname);
|
||
|
stat_to_qid(&vs->stbuf, &vs->qid);
|
||
|
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit);
|
||
|
err = vs->offset;
|
||
|
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
v9fs_string_free(&vs->extension);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err)
|
||
|
{
|
||
|
if (err == 0) {
|
||
|
vs->iounit = get_iounit(s, &vs->fidp->path);
|
||
|
v9fs_create_post_getiounit(s, vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
v9fs_string_free(&vs->extension);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err)
|
||
|
{
|
||
|
if (err) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (!vs->fidp->fs.dir) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
vs->fidp->fid_type = P9_FID_DIR;
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname);
|
||
|
v9fs_create_post_opendir(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err)
|
||
|
{
|
||
|
if (err) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
|
||
|
v9fs_create_post_dir_lstat(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err)
|
||
|
{
|
||
|
if (err) {
|
||
|
vs->fidp->fid_type = P9_FID_NONE;
|
||
|
close(vs->fidp->fs.fd);
|
||
|
err = -errno;
|
||
|
}
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err)
|
||
|
{
|
||
|
if (vs->fidp->fs.fd == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->fidp->fid_type = P9_FID_FILE;
|
||
|
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
|
||
|
v9fs_create_post_fstat(s, vs, err);
|
||
|
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
|
||
|
}
|
||
|
|
||
|
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
|
||
|
{
|
||
|
|
||
|
if (err == 0 || errno != ENOENT) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->perm & P9_STAT_MODE_DIR) {
|
||
|
err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777,
|
||
|
vs->fidp->uid, -1);
|
||
|
v9fs_create_post_mkdir(s, vs, err);
|
||
|
} else if (vs->perm & P9_STAT_MODE_SYMLINK) {
|
||
|
err = v9fs_do_symlink(s, vs->fidp, vs->extension.data,
|
||
|
vs->fullname.data, -1);
|
||
|
v9fs_create_post_perms(s, vs, err);
|
||
|
} else if (vs->perm & P9_STAT_MODE_LINK) {
|
||
|
int32_t nfid = atoi(vs->extension.data);
|
||
|
V9fsFidState *nfidp = lookup_fid(s, nfid);
|
||
|
if (nfidp == NULL) {
|
||
|
err = -errno;
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
}
|
||
|
err = v9fs_do_link(s, &nfidp->path, &vs->fullname);
|
||
|
v9fs_create_post_perms(s, vs, err);
|
||
|
} else if (vs->perm & P9_STAT_MODE_DEVICE) {
|
||
|
char ctype;
|
||
|
uint32_t major, minor;
|
||
|
mode_t nmode = 0;
|
||
|
|
||
|
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major,
|
||
|
&minor) != 3) {
|
||
|
err = -errno;
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
}
|
||
|
|
||
|
switch (ctype) {
|
||
|
case 'c':
|
||
|
nmode = S_IFCHR;
|
||
|
break;
|
||
|
case 'b':
|
||
|
nmode = S_IFBLK;
|
||
|
break;
|
||
|
default:
|
||
|
err = -EIO;
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
}
|
||
|
|
||
|
nmode |= vs->perm & 0777;
|
||
|
err = v9fs_do_mknod(s, vs->fullname.data, nmode,
|
||
|
makedev(major, minor), vs->fidp->uid, -1);
|
||
|
v9fs_create_post_perms(s, vs, err);
|
||
|
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) {
|
||
|
err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777),
|
||
|
0, vs->fidp->uid, -1);
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
} else if (vs->perm & P9_STAT_MODE_SOCKET) {
|
||
|
err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777),
|
||
|
0, vs->fidp->uid, -1);
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
} else {
|
||
|
vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid,
|
||
|
-1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm);
|
||
|
|
||
|
v9fs_create_post_open2(s, vs, err);
|
||
|
}
|
||
|
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_post_create(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_create(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsCreateState *vs;
|
||
|
int err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
v9fs_string_init(&vs->fullname);
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
||
|
&vs->perm, &vs->mode, &vs->extension);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
||
|
vs->name.data);
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
|
||
|
v9fs_create_post_lstat(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
v9fs_string_free(&vs->extension);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err)
|
||
|
{
|
||
|
if (err == 0) {
|
||
|
stat_to_qid(&vs->stbuf, &vs->qid);
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
||
|
err = vs->offset;
|
||
|
} else {
|
||
|
err = -errno;
|
||
|
}
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
v9fs_string_free(&vs->symname);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err) {
|
||
|
goto out;
|
||
|
}
|
||
|
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
|
||
|
out:
|
||
|
v9fs_post_symlink(s, vs, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t dfid;
|
||
|
V9fsSymlinkState *vs;
|
||
|
int err = 0;
|
||
|
gid_t gid;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
v9fs_string_init(&vs->fullname);
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name,
|
||
|
&vs->symname, &gid);
|
||
|
|
||
|
vs->dfidp = lookup_fid(s, dfid);
|
||
|
if (vs->dfidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data,
|
||
|
vs->name.data);
|
||
|
err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data,
|
||
|
vs->fullname.data, gid);
|
||
|
v9fs_symlink_post_do_symlink(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
v9fs_string_free(&vs->symname);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
/* A nop call with no return */
|
||
|
complete_pdu(s, pdu, 7);
|
||
|
}
|
||
|
|
||
|
static void v9fs_link(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t dfid, oldfid;
|
||
|
V9fsFidState *dfidp, *oldfidp;
|
||
|
V9fsString name, fullname;
|
||
|
size_t offset = 7;
|
||
|
int err = 0;
|
||
|
|
||
|
v9fs_string_init(&fullname);
|
||
|
|
||
|
pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name);
|
||
|
|
||
|
dfidp = lookup_fid(s, dfid);
|
||
|
if (dfidp == NULL) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
oldfidp = lookup_fid(s, oldfid);
|
||
|
if (oldfidp == NULL) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data);
|
||
|
err = offset;
|
||
|
err = v9fs_do_link(s, &oldfidp->path, &fullname);
|
||
|
if (err) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
v9fs_string_free(&fullname);
|
||
|
|
||
|
out:
|
||
|
v9fs_string_free(&name);
|
||
|
complete_pdu(s, pdu, err);
|
||
|
}
|
||
|
|
||
|
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
err = -errno;
|
||
|
} else {
|
||
|
err = vs->offset;
|
||
|
}
|
||
|
|
||
|
/* For TREMOVE we need to clunk the fid even on failed remove */
|
||
|
free_fid(s, vs->fidp->fid);
|
||
|
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsRemoveState *vs;
|
||
|
int err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = v9fs_do_remove(s, &vs->fidp->path);
|
||
|
v9fs_remove_post_remove(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = vs->offset;
|
||
|
|
||
|
out:
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
goto out;
|
||
|
}
|
||
|
if (vs->v9stat.length != -1) {
|
||
|
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
}
|
||
|
v9fs_wstat_post_truncate(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs)
|
||
|
{
|
||
|
int err = 0;
|
||
|
char *old_name, *new_name;
|
||
|
char *end;
|
||
|
|
||
|
if (vs->newdirfid != -1) {
|
||
|
V9fsFidState *dirfidp;
|
||
|
dirfidp = lookup_fid(s, vs->newdirfid);
|
||
|
|
||
|
if (dirfidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
BUG_ON(dirfidp->fid_type != P9_FID_NONE);
|
||
|
|
||
|
new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2);
|
||
|
|
||
|
strcpy(new_name, dirfidp->path.data);
|
||
|
strcat(new_name, "/");
|
||
|
strcat(new_name + dirfidp->path.size, vs->name.data);
|
||
|
} else {
|
||
|
old_name = vs->fidp->path.data;
|
||
|
end = strrchr(old_name, '/');
|
||
|
if (end) {
|
||
|
end++;
|
||
|
} else {
|
||
|
end = old_name;
|
||
|
}
|
||
|
new_name = qemu_mallocz(end - old_name + vs->name.size + 1);
|
||
|
|
||
|
strncat(new_name, old_name, end - old_name);
|
||
|
strncat(new_name + (end - old_name), vs->name.data, vs->name.size);
|
||
|
}
|
||
|
|
||
|
v9fs_string_free(&vs->name);
|
||
|
vs->name.data = qemu_strdup(new_name);
|
||
|
vs->name.size = strlen(new_name);
|
||
|
|
||
|
if (strcmp(new_name, vs->fidp->path.data) != 0) {
|
||
|
if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) {
|
||
|
err = -errno;
|
||
|
} else {
|
||
|
V9fsFidState *fidp;
|
||
|
/*
|
||
|
* Fixup fid's pointing to the old name to
|
||
|
* start pointing to the new name
|
||
|
*/
|
||
|
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
||
|
if (vs->fidp == fidp) {
|
||
|
/*
|
||
|
* we replace name of this fid towards the end
|
||
|
* so that our below strcmp will work
|
||
|
*/
|
||
|
continue;
|
||
|
}
|
||
|
if (!strncmp(vs->fidp->path.data, fidp->path.data,
|
||
|
strlen(vs->fidp->path.data))) {
|
||
|
/* replace the name */
|
||
|
v9fs_fix_path(&fidp->path, &vs->name,
|
||
|
strlen(vs->fidp->path.data));
|
||
|
}
|
||
|
}
|
||
|
v9fs_string_copy(&vs->fidp->path, &vs->name);
|
||
|
}
|
||
|
}
|
||
|
out:
|
||
|
v9fs_string_free(&vs->name);
|
||
|
return err;
|
||
|
}
|
||
|
|
||
|
static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err)
|
||
|
{
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->v9stat.name.size != 0) {
|
||
|
V9fsRenameState *vr;
|
||
|
|
||
|
vr = qemu_mallocz(sizeof(V9fsRenameState));
|
||
|
vr->newdirfid = -1;
|
||
|
vr->pdu = vs->pdu;
|
||
|
vr->fidp = vs->fidp;
|
||
|
vr->offset = vs->offset;
|
||
|
vr->name.size = vs->v9stat.name.size;
|
||
|
vr->name.data = qemu_strdup(vs->v9stat.name.data);
|
||
|
|
||
|
err = v9fs_complete_rename(s, vr);
|
||
|
qemu_free(vr);
|
||
|
}
|
||
|
v9fs_wstat_post_rename(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_rename(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsRenameState *vs;
|
||
|
ssize_t err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
BUG_ON(vs->fidp->fid_type != P9_FID_NONE);
|
||
|
|
||
|
err = v9fs_complete_rename(s, vs);
|
||
|
v9fs_rename_post_rename(s, vs, err);
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) {
|
||
|
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
||
|
vs->v9stat.n_gid)) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
}
|
||
|
v9fs_wstat_post_chown(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) {
|
||
|
struct timespec times[2];
|
||
|
if (vs->v9stat.atime != -1) {
|
||
|
times[0].tv_sec = vs->v9stat.atime;
|
||
|
times[0].tv_nsec = 0;
|
||
|
} else {
|
||
|
times[0].tv_nsec = UTIME_OMIT;
|
||
|
}
|
||
|
if (vs->v9stat.mtime != -1) {
|
||
|
times[1].tv_sec = vs->v9stat.mtime;
|
||
|
times[1].tv_nsec = 0;
|
||
|
} else {
|
||
|
times[1].tv_nsec = UTIME_OMIT;
|
||
|
}
|
||
|
|
||
|
if (v9fs_do_utimensat(s, &vs->fidp->path, times)) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
v9fs_wstat_post_utime(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err)
|
||
|
{
|
||
|
uint32_t v9_mode;
|
||
|
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
v9_mode = stat_to_v9mode(&vs->stbuf);
|
||
|
|
||
|
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
||
|
(v9_mode & P9_STAT_MODE_TYPE_BITS)) {
|
||
|
/* Attempting to change the type */
|
||
|
err = -EIO;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
||
|
&vs->v9stat.extension))) {
|
||
|
err = -errno;
|
||
|
}
|
||
|
v9fs_wstat_post_chmod(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsWstatState *vs;
|
||
|
int err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* do we need to sync the file? */
|
||
|
if (donttouch_stat(&vs->v9stat)) {
|
||
|
err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0);
|
||
|
v9fs_wstat_post_fsync(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (vs->v9stat.mode != -1) {
|
||
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
||
|
v9fs_wstat_post_lstat(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
v9fs_wstat_post_chmod(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
v9fs_stat_free(&vs->v9stat);
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err)
|
||
|
{
|
||
|
int32_t bsize_factor;
|
||
|
|
||
|
if (err) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* compute bsize factor based on host file system block size
|
||
|
* and client msize
|
||
|
*/
|
||
|
bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize;
|
||
|
if (!bsize_factor) {
|
||
|
bsize_factor = 1;
|
||
|
}
|
||
|
vs->v9statfs.f_type = vs->stbuf.f_type;
|
||
|
vs->v9statfs.f_bsize = vs->stbuf.f_bsize;
|
||
|
vs->v9statfs.f_bsize *= bsize_factor;
|
||
|
/*
|
||
|
* f_bsize is adjusted(multiplied) by bsize factor, so we need to
|
||
|
* adjust(divide) the number of blocks, free blocks and available
|
||
|
* blocks by bsize factor
|
||
|
*/
|
||
|
vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor;
|
||
|
vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor;
|
||
|
vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor;
|
||
|
vs->v9statfs.f_files = vs->stbuf.f_files;
|
||
|
vs->v9statfs.f_ffree = vs->stbuf.f_ffree;
|
||
|
vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] |
|
||
|
(unsigned long long)vs->stbuf.f_fsid.__val[1] << 32;
|
||
|
vs->v9statfs.f_namelen = vs->stbuf.f_namelen;
|
||
|
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd",
|
||
|
vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks,
|
||
|
vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files,
|
||
|
vs->v9statfs.f_ffree, vs->v9statfs.fsid_val,
|
||
|
vs->v9statfs.f_namelen);
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, vs->offset);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
V9fsStatfsState *vs;
|
||
|
ssize_t err = 0;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
memset(&vs->v9statfs, 0, sizeof(vs->v9statfs));
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, vs->fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf);
|
||
|
v9fs_statfs_post_statfs(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
stat_to_qid(&vs->stbuf, &vs->qid);
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
|
||
|
v9fs_mknod_post_lstat(s, vs, err);
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsMkState *vs;
|
||
|
int err = 0;
|
||
|
V9fsFidState *fidp;
|
||
|
gid_t gid;
|
||
|
int mode;
|
||
|
int major, minor;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
v9fs_string_init(&vs->fullname);
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode,
|
||
|
&major, &minor, &gid);
|
||
|
|
||
|
fidp = lookup_fid(s, fid);
|
||
|
if (fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
||
|
err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor),
|
||
|
fidp->uid, gid);
|
||
|
v9fs_mknod_post_mknod(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Implement posix byte range locking code
|
||
|
* Server side handling of locking code is very simple, because 9p server in
|
||
|
* QEMU can handle only one client. And most of the lock handling
|
||
|
* (like conflict, merging) etc is done by the VFS layer itself, so no need to
|
||
|
* do any thing in * qemu 9p server side lock code path.
|
||
|
* So when a TLOCK request comes, always return success
|
||
|
*/
|
||
|
|
||
|
static void v9fs_lock(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid, err = 0;
|
||
|
V9fsLockState *vs;
|
||
|
|
||
|
vs = qemu_mallocz(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
vs->flock = qemu_malloc(sizeof(*vs->flock));
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dbdqqds", &fid, &vs->flock->type,
|
||
|
&vs->flock->flags, &vs->flock->start, &vs->flock->length,
|
||
|
&vs->flock->proc_id, &vs->flock->client_id);
|
||
|
|
||
|
vs->status = P9_LOCK_ERROR;
|
||
|
|
||
|
/* We support only block flag now (that too ignored currently) */
|
||
|
if (vs->flock->flags & ~P9_LOCK_FLAGS_BLOCK) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
|
||
|
if (err < 0) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->status = P9_LOCK_SUCCESS;
|
||
|
out:
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "b", vs->status);
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs->flock);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* When a TGETLOCK request comes, always return success because all lock
|
||
|
* handling is done by client's VFS layer.
|
||
|
*/
|
||
|
|
||
|
static void v9fs_getlock(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid, err = 0;
|
||
|
V9fsGetlockState *vs;
|
||
|
|
||
|
vs = qemu_mallocz(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
vs->glock = qemu_malloc(sizeof(*vs->glock));
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type,
|
||
|
&vs->glock->start, &vs->glock->length, &vs->glock->proc_id,
|
||
|
&vs->glock->client_id);
|
||
|
|
||
|
vs->fidp = lookup_fid(s, fid);
|
||
|
if (vs->fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf);
|
||
|
if (err < 0) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->glock->type = F_UNLCK;
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type,
|
||
|
vs->glock->start, vs->glock->length, vs->glock->proc_id,
|
||
|
&vs->glock->client_id);
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs->glock);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
stat_to_qid(&vs->stbuf, &vs->qid);
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err)
|
||
|
{
|
||
|
if (err == -1) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
|
||
|
v9fs_mkdir_post_lstat(s, vs, err);
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsMkState *vs;
|
||
|
int err = 0;
|
||
|
V9fsFidState *fidp;
|
||
|
gid_t gid;
|
||
|
int mode;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
v9fs_string_init(&vs->fullname);
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode,
|
||
|
&gid);
|
||
|
|
||
|
fidp = lookup_fid(s, fid);
|
||
|
if (fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data);
|
||
|
err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid);
|
||
|
v9fs_mkdir_post_mkdir(s, vs, err);
|
||
|
return;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->fullname);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err)
|
||
|
{
|
||
|
|
||
|
if (err < 0) {
|
||
|
err = -errno;
|
||
|
free_fid(s, vs->xattr_fidp->fid);
|
||
|
goto out;
|
||
|
}
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
err = -errno;
|
||
|
free_fid(s, vs->xattr_fidp->fid);
|
||
|
goto out;
|
||
|
}
|
||
|
/*
|
||
|
* Read the xattr value
|
||
|
*/
|
||
|
vs->xattr_fidp->fs.xattr.len = vs->size;
|
||
|
vs->xattr_fidp->fid_type = P9_FID_XATTR;
|
||
|
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
||
|
if (vs->size) {
|
||
|
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
|
||
|
err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
|
||
|
&vs->name, vs->xattr_fidp->fs.xattr.value,
|
||
|
vs->xattr_fidp->fs.xattr.len);
|
||
|
}
|
||
|
v9fs_post_xattr_getvalue(s, vs, err);
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_post_lxattr_getvalue(V9fsState *s,
|
||
|
V9fsXattrState *vs, int err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
err = -errno;
|
||
|
free_fid(s, vs->xattr_fidp->fid);
|
||
|
goto out;
|
||
|
}
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
static void v9fs_post_lxattr_check(V9fsState *s,
|
||
|
V9fsXattrState *vs, ssize_t err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
err = -errno;
|
||
|
free_fid(s, vs->xattr_fidp->fid);
|
||
|
goto out;
|
||
|
}
|
||
|
/*
|
||
|
* Read the xattr value
|
||
|
*/
|
||
|
vs->xattr_fidp->fs.xattr.len = vs->size;
|
||
|
vs->xattr_fidp->fid_type = P9_FID_XATTR;
|
||
|
vs->xattr_fidp->fs.xattr.copied_len = -1;
|
||
|
if (vs->size) {
|
||
|
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
|
||
|
err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
|
||
|
vs->xattr_fidp->fs.xattr.value,
|
||
|
vs->xattr_fidp->fs.xattr.len);
|
||
|
}
|
||
|
v9fs_post_lxattr_getvalue(s, vs, err);
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_xattrwalk(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
ssize_t err = 0;
|
||
|
V9fsXattrState *vs;
|
||
|
int32_t fid, newfid;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name);
|
||
|
vs->file_fidp = lookup_fid(s, fid);
|
||
|
if (vs->file_fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
vs->xattr_fidp = alloc_fid(s, newfid);
|
||
|
if (vs->xattr_fidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path);
|
||
|
if (vs->name.data[0] == 0) {
|
||
|
/*
|
||
|
* listxattr request. Get the size first
|
||
|
*/
|
||
|
vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path,
|
||
|
NULL, 0);
|
||
|
if (vs->size < 0) {
|
||
|
err = vs->size;
|
||
|
}
|
||
|
v9fs_post_lxattr_check(s, vs, err);
|
||
|
return;
|
||
|
} else {
|
||
|
/*
|
||
|
* specific xattr fid. We check for xattr
|
||
|
* presence also collect the xattr size
|
||
|
*/
|
||
|
vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path,
|
||
|
&vs->name, NULL, 0);
|
||
|
if (vs->size < 0) {
|
||
|
err = vs->size;
|
||
|
}
|
||
|
v9fs_post_xattr_check(s, vs, err);
|
||
|
return;
|
||
|
}
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_xattrcreate(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int flags;
|
||
|
int32_t fid;
|
||
|
ssize_t err = 0;
|
||
|
V9fsXattrState *vs;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "dsqd",
|
||
|
&fid, &vs->name, &vs->size, &flags);
|
||
|
|
||
|
vs->file_fidp = lookup_fid(s, fid);
|
||
|
if (vs->file_fidp == NULL) {
|
||
|
err = -EINVAL;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
/* Make the file fid point to xattr */
|
||
|
vs->xattr_fidp = vs->file_fidp;
|
||
|
vs->xattr_fidp->fid_type = P9_FID_XATTR;
|
||
|
vs->xattr_fidp->fs.xattr.copied_len = 0;
|
||
|
vs->xattr_fidp->fs.xattr.len = vs->size;
|
||
|
vs->xattr_fidp->fs.xattr.flags = flags;
|
||
|
v9fs_string_init(&vs->xattr_fidp->fs.xattr.name);
|
||
|
v9fs_string_copy(&vs->xattr_fidp->fs.xattr.name, &vs->name);
|
||
|
if (vs->size)
|
||
|
vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size);
|
||
|
else
|
||
|
vs->xattr_fidp->fs.xattr.value = NULL;
|
||
|
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->name);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_readlink_post_readlink(V9fsState *s, V9fsReadLinkState *vs,
|
||
|
int err)
|
||
|
{
|
||
|
if (err < 0) {
|
||
|
err = -errno;
|
||
|
goto out;
|
||
|
}
|
||
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "s", &vs->target);
|
||
|
err = vs->offset;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
v9fs_string_free(&vs->target);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
static void v9fs_readlink(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
int32_t fid;
|
||
|
V9fsReadLinkState *vs;
|
||
|
int err = 0;
|
||
|
V9fsFidState *fidp;
|
||
|
|
||
|
vs = qemu_malloc(sizeof(*vs));
|
||
|
vs->pdu = pdu;
|
||
|
vs->offset = 7;
|
||
|
|
||
|
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
||
|
|
||
|
fidp = lookup_fid(s, fid);
|
||
|
if (fidp == NULL) {
|
||
|
err = -ENOENT;
|
||
|
goto out;
|
||
|
}
|
||
|
|
||
|
v9fs_string_init(&vs->target);
|
||
|
err = v9fs_do_readlink(s, &fidp->path, &vs->target);
|
||
|
v9fs_readlink_post_readlink(s, vs, err);
|
||
|
return;
|
||
|
out:
|
||
|
complete_pdu(s, vs->pdu, err);
|
||
|
qemu_free(vs);
|
||
|
}
|
||
|
|
||
|
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu);
|
||
|
|
||
|
static pdu_handler_t *pdu_handlers[] = {
|
||
|
[P9_TREADDIR] = v9fs_readdir,
|
||
|
[P9_TSTATFS] = v9fs_statfs,
|
||
|
[P9_TGETATTR] = v9fs_getattr,
|
||
|
[P9_TSETATTR] = v9fs_setattr,
|
||
|
[P9_TXATTRWALK] = v9fs_xattrwalk,
|
||
|
[P9_TXATTRCREATE] = v9fs_xattrcreate,
|
||
|
[P9_TMKNOD] = v9fs_mknod,
|
||
|
[P9_TRENAME] = v9fs_rename,
|
||
|
[P9_TLOCK] = v9fs_lock,
|
||
|
[P9_TGETLOCK] = v9fs_getlock,
|
||
|
[P9_TREADLINK] = v9fs_readlink,
|
||
|
[P9_TMKDIR] = v9fs_mkdir,
|
||
|
[P9_TVERSION] = v9fs_version,
|
||
|
[P9_TLOPEN] = v9fs_open,
|
||
|
[P9_TATTACH] = v9fs_attach,
|
||
|
[P9_TSTAT] = v9fs_stat,
|
||
|
[P9_TWALK] = v9fs_walk,
|
||
|
[P9_TCLUNK] = v9fs_clunk,
|
||
|
[P9_TFSYNC] = v9fs_fsync,
|
||
|
[P9_TOPEN] = v9fs_open,
|
||
|
[P9_TREAD] = v9fs_read,
|
||
|
#if 0
|
||
|
[P9_TAUTH] = v9fs_auth,
|
||
|
#endif
|
||
|
[P9_TFLUSH] = v9fs_flush,
|
||
|
[P9_TLINK] = v9fs_link,
|
||
|
[P9_TSYMLINK] = v9fs_symlink,
|
||
|
[P9_TCREATE] = v9fs_create,
|
||
|
[P9_TLCREATE] = v9fs_lcreate,
|
||
|
[P9_TWRITE] = v9fs_write,
|
||
|
[P9_TWSTAT] = v9fs_wstat,
|
||
|
[P9_TREMOVE] = v9fs_remove,
|
||
|
};
|
||
|
|
||
|
static void submit_pdu(V9fsState *s, V9fsPDU *pdu)
|
||
|
{
|
||
|
pdu_handler_t *handler;
|
||
|
|
||
|
if (debug_9p_pdu) {
|
||
|
pprint_pdu(pdu);
|
||
|
}
|
||
|
|
||
|
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers));
|
||
|
|
||
|
handler = pdu_handlers[pdu->id];
|
||
|
BUG_ON(handler == NULL);
|
||
|
|
||
|
handler(s, pdu);
|
||
|
}
|
||
|
|
||
|
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
|
||
|
{
|
||
|
V9fsState *s = (V9fsState *)vdev;
|
||
|
V9fsPDU *pdu;
|
||
|
ssize_t len;
|
||
|
|
||
|
while ((pdu = alloc_pdu(s)) &&
|
||
|
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
||
|
uint8_t *ptr;
|
||
|
|
||
|
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
|
||
|
BUG_ON(pdu->elem.out_sg[0].iov_len < 7);
|
||
|
|
||
|
ptr = pdu->elem.out_sg[0].iov_base;
|
||
|
|
||
|
memcpy(&pdu->size, ptr, 4);
|
||
|
pdu->id = ptr[4];
|
||
|
memcpy(&pdu->tag, ptr + 5, 2);
|
||
|
|
||
|
submit_pdu(s, pdu);
|
||
|
}
|
||
|
|
||
|
free_pdu(s, pdu);
|
||
|
}
|
||
|
|
||
|
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
||
|
{
|
||
|
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
||
|
return features;
|
||
|
}
|
||
|
|
||
|
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
||
|
{
|
||
|
return (V9fsState *)vdev;
|
||
|
}
|
||
|
|
||
|
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
|
||
|
{
|
||
|
struct virtio_9p_config *cfg;
|
||
|
V9fsState *s = to_virtio_9p(vdev);
|
||
|
|
||
|
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) +
|
||
|
s->tag_len);
|
||
|
stw_raw(&cfg->tag_len, s->tag_len);
|
||
|
memcpy(cfg->tag, s->tag, s->tag_len);
|
||
|
memcpy(config, cfg, s->config_size);
|
||
|
qemu_free(cfg);
|
||
|
}
|
||
|
|
||
|
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
|
||
|
{
|
||
|
V9fsState *s;
|
||
|
int i, len;
|
||
|
struct stat stat;
|
||
|
FsTypeEntry *fse;
|
||
|
|
||
|
|
||
|
s = (V9fsState *)virtio_common_init("virtio-9p",
|
||
|
VIRTIO_ID_9P,
|
||
|
sizeof(struct virtio_9p_config)+
|
||
|
MAX_TAG_LEN,
|
||
|
sizeof(V9fsState));
|
||
|
|
||
|
/* initialize pdu allocator */
|
||
|
QLIST_INIT(&s->free_list);
|
||
|
for (i = 0; i < (MAX_REQ - 1); i++) {
|
||
|
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
|
||
|
}
|
||
|
|
||
|
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
|
||
|
|
||
|
fse = get_fsdev_fsentry(conf->fsdev_id);
|
||
|
|
||
|
if (!fse) {
|
||
|
/* We don't have a fsdev identified by fsdev_id */
|
||
|
fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
|
||
|
"id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
|
||
|
exit(1);
|
||
|
}
|
||
|
|
||
|
if (!fse->path || !conf->tag) {
|
||
|
/* we haven't specified a mount_tag or the path */
|
||
|
fprintf(stderr, "fsdev with id %s needs path "
|
||
|
"and Virtio-9p device needs mount_tag arguments\n",
|
||
|
conf->fsdev_id);
|
||
|
exit(1);
|
||
|
}
|
||
|
|
||
|
if (!strcmp(fse->security_model, "passthrough")) {
|
||
|
/* Files on the Fileserver set to client user credentials */
|
||
|
s->ctx.fs_sm = SM_PASSTHROUGH;
|
||
|
s->ctx.xops = passthrough_xattr_ops;
|
||
|
} else if (!strcmp(fse->security_model, "mapped")) {
|
||
|
/* Files on the fileserver are set to QEMU credentials.
|
||
|
* Client user credentials are saved in extended attributes.
|
||
|
*/
|
||
|
s->ctx.fs_sm = SM_MAPPED;
|
||
|
s->ctx.xops = mapped_xattr_ops;
|
||
|
} else if (!strcmp(fse->security_model, "none")) {
|
||
|
/*
|
||
|
* Files on the fileserver are set to QEMU credentials.
|
||
|
*/
|
||
|
s->ctx.fs_sm = SM_NONE;
|
||
|
s->ctx.xops = none_xattr_ops;
|
||
|
} else {
|
||
|
fprintf(stderr, "Default to security_model=none. You may want"
|
||
|
" enable advanced security model using "
|
||
|
"security option:\n\t security_model=passthrough \n\t "
|
||
|
"security_model=mapped\n");
|
||
|
s->ctx.fs_sm = SM_NONE;
|
||
|
s->ctx.xops = none_xattr_ops;
|
||
|
}
|
||
|
|
||
|
if (lstat(fse->path, &stat)) {
|
||
|
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
||
|
exit(1);
|
||
|
} else if (!S_ISDIR(stat.st_mode)) {
|
||
|
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
||
|
exit(1);
|
||
|
}
|
||
|
|
||
|
s->ctx.fs_root = qemu_strdup(fse->path);
|
||
|
len = strlen(conf->tag);
|
||
|
if (len > MAX_TAG_LEN) {
|
||
|
len = MAX_TAG_LEN;
|
||
|
}
|
||
|
/* s->tag is non-NULL terminated string */
|
||
|
s->tag = qemu_malloc(len);
|
||
|
memcpy(s->tag, conf->tag, len);
|
||
|
s->tag_len = len;
|
||
|
s->ctx.uid = -1;
|
||
|
|
||
|
s->ops = fse->ops;
|
||
|
s->vdev.get_features = virtio_9p_get_features;
|
||
|
s->config_size = sizeof(struct virtio_9p_config) +
|
||
|
s->tag_len;
|
||
|
s->vdev.get_config = virtio_9p_get_config;
|
||
|
|
||
|
return &s->vdev;
|
||
|
}
|