root / hw / 9pfs / virtio-9p-proxy.c @ 84a87cc4
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| 1 |
/*
|
|---|---|
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* Virtio 9p Proxy callback
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
|
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* M. Mohan Kumar <mohan@in.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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#include <sys/socket.h> |
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#include <sys/un.h> |
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#include "hw/virtio.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-proxy.h" |
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|
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typedef struct V9fsProxy { |
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int sockfd;
|
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QemuMutex mutex; |
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struct iovec in_iovec;
|
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struct iovec out_iovec;
|
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} V9fsProxy; |
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|
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/*
|
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* Return received file descriptor on success in *status.
|
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* errno is also returned on *status (which will be < 0)
|
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* return < 0 on transport error.
|
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*/
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static int v9fs_receivefd(int sockfd, int *status) |
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{
|
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struct iovec iov;
|
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struct msghdr msg;
|
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struct cmsghdr *cmsg;
|
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int retval, data, fd;
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union MsgControl msg_control;
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|
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iov.iov_base = &data; |
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iov.iov_len = sizeof(data);
|
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|
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memset(&msg, 0, sizeof(msg)); |
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msg.msg_iov = &iov; |
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msg.msg_iovlen = 1;
|
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msg.msg_control = &msg_control; |
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msg.msg_controllen = sizeof(msg_control);
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|
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do {
|
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retval = recvmsg(sockfd, &msg, 0);
|
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} while (retval < 0 && errno == EINTR); |
| 51 |
if (retval <= 0) { |
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return retval;
|
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} |
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/*
|
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* data is set to V9FS_FD_VALID, if ancillary data is sent. If this
|
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* request doesn't need ancillary data (fd) or an error occurred,
|
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* data is set to negative errno value.
|
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*/
|
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if (data != V9FS_FD_VALID) {
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*status = data; |
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return 0; |
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} |
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/*
|
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* File descriptor (fd) is sent in the ancillary data. Check if we
|
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* indeed received it. One of the reasons to fail to receive it is if
|
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* we exceeded the maximum number of file descriptors!
|
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*/
|
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for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
|
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if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) || |
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cmsg->cmsg_level != SOL_SOCKET || |
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cmsg->cmsg_type != SCM_RIGHTS) {
|
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continue;
|
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} |
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fd = *((int *)CMSG_DATA(cmsg));
|
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*status = fd; |
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return 0; |
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} |
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*status = -ENFILE; /* Ancillary data sent but not received */
|
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return 0; |
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} |
| 81 |
|
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static ssize_t socket_read(int sockfd, void *buff, size_t size) |
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{
|
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ssize_t retval, total = 0;
|
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|
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while (size) {
|
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retval = read(sockfd, buff, size); |
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if (retval == 0) { |
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return -EIO;
|
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} |
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if (retval < 0) { |
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if (errno == EINTR) {
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continue;
|
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} |
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return -errno;
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} |
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size -= retval; |
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buff += retval; |
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total += retval; |
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} |
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return total;
|
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} |
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|
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/* Converts proxy_statfs to VFS statfs structure */
|
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static void prstatfs_to_statfs(struct statfs *stfs, ProxyStatFS *prstfs) |
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{
|
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memset(stfs, 0, sizeof(*stfs)); |
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stfs->f_type = prstfs->f_type; |
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stfs->f_bsize = prstfs->f_bsize; |
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stfs->f_blocks = prstfs->f_blocks; |
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stfs->f_bfree = prstfs->f_bfree; |
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stfs->f_bavail = prstfs->f_bavail; |
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stfs->f_files = prstfs->f_files; |
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stfs->f_ffree = prstfs->f_ffree; |
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stfs->f_fsid.__val[0] = prstfs->f_fsid[0] & 0xFFFFFFFFUL; |
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stfs->f_fsid.__val[1] = prstfs->f_fsid[1] >> 32 & 0xFFFFFFFFFUL; |
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stfs->f_namelen = prstfs->f_namelen; |
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stfs->f_frsize = prstfs->f_frsize; |
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} |
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|
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/* Converts proxy_stat structure to VFS stat structure */
|
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static void prstat_to_stat(struct stat *stbuf, ProxyStat *prstat) |
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{
|
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memset(stbuf, 0, sizeof(*stbuf)); |
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stbuf->st_dev = prstat->st_dev; |
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stbuf->st_ino = prstat->st_ino; |
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stbuf->st_nlink = prstat->st_nlink; |
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stbuf->st_mode = prstat->st_mode; |
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stbuf->st_uid = prstat->st_uid; |
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stbuf->st_gid = prstat->st_gid; |
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stbuf->st_rdev = prstat->st_rdev; |
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stbuf->st_size = prstat->st_size; |
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stbuf->st_blksize = prstat->st_blksize; |
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stbuf->st_blocks = prstat->st_blocks; |
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stbuf->st_atim.tv_sec = prstat->st_atim_sec; |
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stbuf->st_atim.tv_nsec = prstat->st_atim_nsec; |
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stbuf->st_mtime = prstat->st_mtim_sec; |
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stbuf->st_mtim.tv_nsec = prstat->st_mtim_nsec; |
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stbuf->st_ctime = prstat->st_ctim_sec; |
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stbuf->st_ctim.tv_nsec = prstat->st_ctim_nsec; |
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} |
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|
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/*
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* Response contains two parts
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* {header, data}
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* header.type == T_ERROR, data -> -errno
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* header.type == T_SUCCESS, data -> response
|
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* size of errno/response is given by header.size
|
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* returns < 0, on transport error. response is
|
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* valid only if status >= 0.
|
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*/
|
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static int v9fs_receive_response(V9fsProxy *proxy, int type, |
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int *status, void *response) |
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{
|
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int retval;
|
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ProxyHeader header; |
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struct iovec *reply = &proxy->in_iovec;
|
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|
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*status = 0;
|
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reply->iov_len = 0;
|
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retval = socket_read(proxy->sockfd, reply->iov_base, PROXY_HDR_SZ); |
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if (retval < 0) { |
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return retval;
|
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} |
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reply->iov_len = PROXY_HDR_SZ; |
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proxy_unmarshal(reply, 0, "dd", &header.type, &header.size); |
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/*
|
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* if response size > PROXY_MAX_IO_SZ, read the response but ignore it and
|
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* return -ENOBUFS
|
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*/
|
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if (header.size > PROXY_MAX_IO_SZ) {
|
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int count;
|
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while (header.size > 0) { |
| 174 |
count = MIN(PROXY_MAX_IO_SZ, header.size); |
| 175 |
count = socket_read(proxy->sockfd, reply->iov_base, count); |
| 176 |
if (count < 0) { |
| 177 |
return count;
|
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} |
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header.size -= count; |
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} |
| 181 |
*status = -ENOBUFS; |
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return 0; |
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} |
| 184 |
|
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retval = socket_read(proxy->sockfd, |
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reply->iov_base + PROXY_HDR_SZ, header.size); |
| 187 |
if (retval < 0) { |
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return retval;
|
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} |
| 190 |
reply->iov_len += header.size; |
| 191 |
/* there was an error during processing request */
|
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if (header.type == T_ERROR) {
|
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int ret;
|
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ret = proxy_unmarshal(reply, PROXY_HDR_SZ, "d", status);
|
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if (ret < 0) { |
| 196 |
*status = ret; |
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} |
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return 0; |
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} |
| 200 |
|
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switch (type) {
|
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case T_LSTAT: {
|
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ProxyStat prstat; |
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retval = proxy_unmarshal(reply, PROXY_HDR_SZ, |
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"qqqdddqqqqqqqqqq", &prstat.st_dev,
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&prstat.st_ino, &prstat.st_nlink, |
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&prstat.st_mode, &prstat.st_uid, |
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&prstat.st_gid, &prstat.st_rdev, |
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&prstat.st_size, &prstat.st_blksize, |
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&prstat.st_blocks, |
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&prstat.st_atim_sec, &prstat.st_atim_nsec, |
| 212 |
&prstat.st_mtim_sec, &prstat.st_mtim_nsec, |
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&prstat.st_ctim_sec, &prstat.st_ctim_nsec); |
| 214 |
prstat_to_stat(response, &prstat); |
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break;
|
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} |
| 217 |
case T_STATFS: {
|
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ProxyStatFS prstfs; |
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retval = proxy_unmarshal(reply, PROXY_HDR_SZ, |
| 220 |
"qqqqqqqqqqq", &prstfs.f_type,
|
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&prstfs.f_bsize, &prstfs.f_blocks, |
| 222 |
&prstfs.f_bfree, &prstfs.f_bavail, |
| 223 |
&prstfs.f_files, &prstfs.f_ffree, |
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&prstfs.f_fsid[0], &prstfs.f_fsid[1], |
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&prstfs.f_namelen, &prstfs.f_frsize); |
| 226 |
prstatfs_to_statfs(response, &prstfs); |
| 227 |
break;
|
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} |
| 229 |
case T_READLINK: {
|
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V9fsString target; |
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v9fs_string_init(&target); |
| 232 |
retval = proxy_unmarshal(reply, PROXY_HDR_SZ, "s", &target);
|
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strcpy(response, target.data); |
| 234 |
v9fs_string_free(&target); |
| 235 |
break;
|
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} |
| 237 |
case T_LGETXATTR:
|
| 238 |
case T_LLISTXATTR: {
|
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V9fsString xattr; |
| 240 |
v9fs_string_init(&xattr); |
| 241 |
retval = proxy_unmarshal(reply, PROXY_HDR_SZ, "s", &xattr);
|
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memcpy(response, xattr.data, xattr.size); |
| 243 |
v9fs_string_free(&xattr); |
| 244 |
break;
|
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} |
| 246 |
case T_GETVERSION:
|
| 247 |
proxy_unmarshal(reply, PROXY_HDR_SZ, "q", response);
|
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break;
|
| 249 |
default:
|
| 250 |
return -1; |
| 251 |
} |
| 252 |
if (retval < 0) { |
| 253 |
*status = retval; |
| 254 |
} |
| 255 |
return 0; |
| 256 |
} |
| 257 |
|
| 258 |
/*
|
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* return < 0 on transport error.
|
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* *status is valid only if return >= 0
|
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*/
|
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static int v9fs_receive_status(V9fsProxy *proxy, |
| 263 |
struct iovec *reply, int *status) |
| 264 |
{
|
| 265 |
int retval;
|
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ProxyHeader header; |
| 267 |
|
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*status = 0;
|
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reply->iov_len = 0;
|
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retval = socket_read(proxy->sockfd, reply->iov_base, PROXY_HDR_SZ); |
| 271 |
if (retval < 0) { |
| 272 |
return retval;
|
| 273 |
} |
| 274 |
reply->iov_len = PROXY_HDR_SZ; |
| 275 |
proxy_unmarshal(reply, 0, "dd", &header.type, &header.size); |
| 276 |
if (header.size != sizeof(int)) { |
| 277 |
*status = -ENOBUFS; |
| 278 |
return 0; |
| 279 |
} |
| 280 |
retval = socket_read(proxy->sockfd, |
| 281 |
reply->iov_base + PROXY_HDR_SZ, header.size); |
| 282 |
if (retval < 0) { |
| 283 |
return retval;
|
| 284 |
} |
| 285 |
reply->iov_len += header.size; |
| 286 |
proxy_unmarshal(reply, PROXY_HDR_SZ, "d", status);
|
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return 0; |
| 288 |
} |
| 289 |
|
| 290 |
/*
|
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* Proxy->header and proxy->request written to socket by QEMU process.
|
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* This request read by proxy helper process
|
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* returns 0 on success and -errno on error
|
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*/
|
| 295 |
static int v9fs_request(V9fsProxy *proxy, int type, |
| 296 |
void *response, const char *fmt, ...) |
| 297 |
{
|
| 298 |
dev_t rdev; |
| 299 |
va_list ap; |
| 300 |
int size = 0; |
| 301 |
int retval = 0; |
| 302 |
uint64_t offset; |
| 303 |
ProxyHeader header = { 0, 0};
|
| 304 |
struct timespec spec[2]; |
| 305 |
int flags, mode, uid, gid;
|
| 306 |
V9fsString *name, *value; |
| 307 |
V9fsString *path, *oldpath; |
| 308 |
struct iovec *iovec = NULL, *reply = NULL; |
| 309 |
|
| 310 |
qemu_mutex_lock(&proxy->mutex); |
| 311 |
|
| 312 |
if (proxy->sockfd == -1) { |
| 313 |
retval = -EIO; |
| 314 |
goto err_out;
|
| 315 |
} |
| 316 |
iovec = &proxy->out_iovec; |
| 317 |
reply = &proxy->in_iovec; |
| 318 |
va_start(ap, fmt); |
| 319 |
switch (type) {
|
| 320 |
case T_OPEN:
|
| 321 |
path = va_arg(ap, V9fsString *); |
| 322 |
flags = va_arg(ap, int);
|
| 323 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sd", path, flags);
|
| 324 |
if (retval > 0) { |
| 325 |
header.size = retval; |
| 326 |
header.type = T_OPEN; |
| 327 |
} |
| 328 |
break;
|
| 329 |
case T_CREATE:
|
| 330 |
path = va_arg(ap, V9fsString *); |
| 331 |
flags = va_arg(ap, int);
|
| 332 |
mode = va_arg(ap, int);
|
| 333 |
uid = va_arg(ap, int);
|
| 334 |
gid = va_arg(ap, int);
|
| 335 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sdddd", path,
|
| 336 |
flags, mode, uid, gid); |
| 337 |
if (retval > 0) { |
| 338 |
header.size = retval; |
| 339 |
header.type = T_CREATE; |
| 340 |
} |
| 341 |
break;
|
| 342 |
case T_MKNOD:
|
| 343 |
path = va_arg(ap, V9fsString *); |
| 344 |
mode = va_arg(ap, int);
|
| 345 |
rdev = va_arg(ap, long int); |
| 346 |
uid = va_arg(ap, int);
|
| 347 |
gid = va_arg(ap, int);
|
| 348 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ddsdq",
|
| 349 |
uid, gid, path, mode, rdev); |
| 350 |
if (retval > 0) { |
| 351 |
header.size = retval; |
| 352 |
header.type = T_MKNOD; |
| 353 |
} |
| 354 |
break;
|
| 355 |
case T_MKDIR:
|
| 356 |
path = va_arg(ap, V9fsString *); |
| 357 |
mode = va_arg(ap, int);
|
| 358 |
uid = va_arg(ap, int);
|
| 359 |
gid = va_arg(ap, int);
|
| 360 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ddsd",
|
| 361 |
uid, gid, path, mode); |
| 362 |
if (retval > 0) { |
| 363 |
header.size = retval; |
| 364 |
header.type = T_MKDIR; |
| 365 |
} |
| 366 |
break;
|
| 367 |
case T_SYMLINK:
|
| 368 |
oldpath = va_arg(ap, V9fsString *); |
| 369 |
path = va_arg(ap, V9fsString *); |
| 370 |
uid = va_arg(ap, int);
|
| 371 |
gid = va_arg(ap, int);
|
| 372 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ddss",
|
| 373 |
uid, gid, oldpath, path); |
| 374 |
if (retval > 0) { |
| 375 |
header.size = retval; |
| 376 |
header.type = T_SYMLINK; |
| 377 |
} |
| 378 |
break;
|
| 379 |
case T_LINK:
|
| 380 |
oldpath = va_arg(ap, V9fsString *); |
| 381 |
path = va_arg(ap, V9fsString *); |
| 382 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ss",
|
| 383 |
oldpath, path); |
| 384 |
if (retval > 0) { |
| 385 |
header.size = retval; |
| 386 |
header.type = T_LINK; |
| 387 |
} |
| 388 |
break;
|
| 389 |
case T_LSTAT:
|
| 390 |
path = va_arg(ap, V9fsString *); |
| 391 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "s", path);
|
| 392 |
if (retval > 0) { |
| 393 |
header.size = retval; |
| 394 |
header.type = T_LSTAT; |
| 395 |
} |
| 396 |
break;
|
| 397 |
case T_READLINK:
|
| 398 |
path = va_arg(ap, V9fsString *); |
| 399 |
size = va_arg(ap, int);
|
| 400 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sd", path, size);
|
| 401 |
if (retval > 0) { |
| 402 |
header.size = retval; |
| 403 |
header.type = T_READLINK; |
| 404 |
} |
| 405 |
break;
|
| 406 |
case T_STATFS:
|
| 407 |
path = va_arg(ap, V9fsString *); |
| 408 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "s", path);
|
| 409 |
if (retval > 0) { |
| 410 |
header.size = retval; |
| 411 |
header.type = T_STATFS; |
| 412 |
} |
| 413 |
break;
|
| 414 |
case T_CHMOD:
|
| 415 |
path = va_arg(ap, V9fsString *); |
| 416 |
mode = va_arg(ap, int);
|
| 417 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sd", path, mode);
|
| 418 |
if (retval > 0) { |
| 419 |
header.size = retval; |
| 420 |
header.type = T_CHMOD; |
| 421 |
} |
| 422 |
break;
|
| 423 |
case T_CHOWN:
|
| 424 |
path = va_arg(ap, V9fsString *); |
| 425 |
uid = va_arg(ap, int);
|
| 426 |
gid = va_arg(ap, int);
|
| 427 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sdd", path, uid, gid);
|
| 428 |
if (retval > 0) { |
| 429 |
header.size = retval; |
| 430 |
header.type = T_CHOWN; |
| 431 |
} |
| 432 |
break;
|
| 433 |
case T_TRUNCATE:
|
| 434 |
path = va_arg(ap, V9fsString *); |
| 435 |
offset = va_arg(ap, uint64_t); |
| 436 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sq", path, offset);
|
| 437 |
if (retval > 0) { |
| 438 |
header.size = retval; |
| 439 |
header.type = T_TRUNCATE; |
| 440 |
} |
| 441 |
break;
|
| 442 |
case T_UTIME:
|
| 443 |
path = va_arg(ap, V9fsString *); |
| 444 |
spec[0].tv_sec = va_arg(ap, long); |
| 445 |
spec[0].tv_nsec = va_arg(ap, long); |
| 446 |
spec[1].tv_sec = va_arg(ap, long); |
| 447 |
spec[1].tv_nsec = va_arg(ap, long); |
| 448 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sqqqq", path,
|
| 449 |
spec[0].tv_sec, spec[1].tv_nsec, |
| 450 |
spec[1].tv_sec, spec[1].tv_nsec); |
| 451 |
if (retval > 0) { |
| 452 |
header.size = retval; |
| 453 |
header.type = T_UTIME; |
| 454 |
} |
| 455 |
break;
|
| 456 |
case T_RENAME:
|
| 457 |
oldpath = va_arg(ap, V9fsString *); |
| 458 |
path = va_arg(ap, V9fsString *); |
| 459 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ss", oldpath, path);
|
| 460 |
if (retval > 0) { |
| 461 |
header.size = retval; |
| 462 |
header.type = T_RENAME; |
| 463 |
} |
| 464 |
break;
|
| 465 |
case T_REMOVE:
|
| 466 |
path = va_arg(ap, V9fsString *); |
| 467 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "s", path);
|
| 468 |
if (retval > 0) { |
| 469 |
header.size = retval; |
| 470 |
header.type = T_REMOVE; |
| 471 |
} |
| 472 |
break;
|
| 473 |
case T_LGETXATTR:
|
| 474 |
size = va_arg(ap, int);
|
| 475 |
path = va_arg(ap, V9fsString *); |
| 476 |
name = va_arg(ap, V9fsString *); |
| 477 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, |
| 478 |
"dss", size, path, name);
|
| 479 |
if (retval > 0) { |
| 480 |
header.size = retval; |
| 481 |
header.type = T_LGETXATTR; |
| 482 |
} |
| 483 |
break;
|
| 484 |
case T_LLISTXATTR:
|
| 485 |
size = va_arg(ap, int);
|
| 486 |
path = va_arg(ap, V9fsString *); |
| 487 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ds", size, path);
|
| 488 |
if (retval > 0) { |
| 489 |
header.size = retval; |
| 490 |
header.type = T_LLISTXATTR; |
| 491 |
} |
| 492 |
break;
|
| 493 |
case T_LSETXATTR:
|
| 494 |
path = va_arg(ap, V9fsString *); |
| 495 |
name = va_arg(ap, V9fsString *); |
| 496 |
value = va_arg(ap, V9fsString *); |
| 497 |
size = va_arg(ap, int);
|
| 498 |
flags = va_arg(ap, int);
|
| 499 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "sssdd",
|
| 500 |
path, name, value, size, flags); |
| 501 |
if (retval > 0) { |
| 502 |
header.size = retval; |
| 503 |
header.type = T_LSETXATTR; |
| 504 |
} |
| 505 |
break;
|
| 506 |
case T_LREMOVEXATTR:
|
| 507 |
path = va_arg(ap, V9fsString *); |
| 508 |
name = va_arg(ap, V9fsString *); |
| 509 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "ss", path, name);
|
| 510 |
if (retval > 0) { |
| 511 |
header.size = retval; |
| 512 |
header.type = T_LREMOVEXATTR; |
| 513 |
} |
| 514 |
break;
|
| 515 |
case T_GETVERSION:
|
| 516 |
path = va_arg(ap, V9fsString *); |
| 517 |
retval = proxy_marshal(iovec, PROXY_HDR_SZ, "s", path);
|
| 518 |
if (retval > 0) { |
| 519 |
header.size = retval; |
| 520 |
header.type = T_GETVERSION; |
| 521 |
} |
| 522 |
break;
|
| 523 |
default:
|
| 524 |
error_report("Invalid type %d\n", type);
|
| 525 |
retval = -EINVAL; |
| 526 |
break;
|
| 527 |
} |
| 528 |
va_end(ap); |
| 529 |
|
| 530 |
if (retval < 0) { |
| 531 |
goto err_out;
|
| 532 |
} |
| 533 |
|
| 534 |
/* marshal the header details */
|
| 535 |
proxy_marshal(iovec, 0, "dd", header.type, header.size); |
| 536 |
header.size += PROXY_HDR_SZ; |
| 537 |
|
| 538 |
retval = qemu_write_full(proxy->sockfd, iovec->iov_base, header.size); |
| 539 |
if (retval != header.size) {
|
| 540 |
goto close_error;
|
| 541 |
} |
| 542 |
|
| 543 |
switch (type) {
|
| 544 |
case T_OPEN:
|
| 545 |
case T_CREATE:
|
| 546 |
/*
|
| 547 |
* A file descriptor is returned as response for
|
| 548 |
* T_OPEN,T_CREATE on success
|
| 549 |
*/
|
| 550 |
if (v9fs_receivefd(proxy->sockfd, &retval) < 0) { |
| 551 |
goto close_error;
|
| 552 |
} |
| 553 |
break;
|
| 554 |
case T_MKNOD:
|
| 555 |
case T_MKDIR:
|
| 556 |
case T_SYMLINK:
|
| 557 |
case T_LINK:
|
| 558 |
case T_CHMOD:
|
| 559 |
case T_CHOWN:
|
| 560 |
case T_RENAME:
|
| 561 |
case T_TRUNCATE:
|
| 562 |
case T_UTIME:
|
| 563 |
case T_REMOVE:
|
| 564 |
case T_LSETXATTR:
|
| 565 |
case T_LREMOVEXATTR:
|
| 566 |
if (v9fs_receive_status(proxy, reply, &retval) < 0) { |
| 567 |
goto close_error;
|
| 568 |
} |
| 569 |
break;
|
| 570 |
case T_LSTAT:
|
| 571 |
case T_READLINK:
|
| 572 |
case T_STATFS:
|
| 573 |
case T_GETVERSION:
|
| 574 |
if (v9fs_receive_response(proxy, type, &retval, response) < 0) { |
| 575 |
goto close_error;
|
| 576 |
} |
| 577 |
break;
|
| 578 |
case T_LGETXATTR:
|
| 579 |
case T_LLISTXATTR:
|
| 580 |
if (!size) {
|
| 581 |
if (v9fs_receive_status(proxy, reply, &retval) < 0) { |
| 582 |
goto close_error;
|
| 583 |
} |
| 584 |
} else {
|
| 585 |
if (v9fs_receive_response(proxy, type, &retval, response) < 0) { |
| 586 |
goto close_error;
|
| 587 |
} |
| 588 |
} |
| 589 |
break;
|
| 590 |
} |
| 591 |
|
| 592 |
err_out:
|
| 593 |
qemu_mutex_unlock(&proxy->mutex); |
| 594 |
return retval;
|
| 595 |
|
| 596 |
close_error:
|
| 597 |
close(proxy->sockfd); |
| 598 |
proxy->sockfd = -1;
|
| 599 |
qemu_mutex_unlock(&proxy->mutex); |
| 600 |
return -EIO;
|
| 601 |
} |
| 602 |
|
| 603 |
static int proxy_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf) |
| 604 |
{
|
| 605 |
int retval;
|
| 606 |
retval = v9fs_request(fs_ctx->private, T_LSTAT, stbuf, "s", fs_path);
|
| 607 |
if (retval < 0) { |
| 608 |
errno = -retval; |
| 609 |
return -1; |
| 610 |
} |
| 611 |
return retval;
|
| 612 |
} |
| 613 |
|
| 614 |
static ssize_t proxy_readlink(FsContext *fs_ctx, V9fsPath *fs_path,
|
| 615 |
char *buf, size_t bufsz)
|
| 616 |
{
|
| 617 |
int retval;
|
| 618 |
retval = v9fs_request(fs_ctx->private, T_READLINK, buf, "sd",
|
| 619 |
fs_path, bufsz); |
| 620 |
if (retval < 0) { |
| 621 |
errno = -retval; |
| 622 |
return -1; |
| 623 |
} |
| 624 |
return strlen(buf);
|
| 625 |
} |
| 626 |
|
| 627 |
static int proxy_close(FsContext *ctx, V9fsFidOpenState *fs) |
| 628 |
{
|
| 629 |
return close(fs->fd);
|
| 630 |
} |
| 631 |
|
| 632 |
static int proxy_closedir(FsContext *ctx, V9fsFidOpenState *fs) |
| 633 |
{
|
| 634 |
return closedir(fs->dir);
|
| 635 |
} |
| 636 |
|
| 637 |
static int proxy_open(FsContext *ctx, V9fsPath *fs_path, |
| 638 |
int flags, V9fsFidOpenState *fs)
|
| 639 |
{
|
| 640 |
fs->fd = v9fs_request(ctx->private, T_OPEN, NULL, "sd", fs_path, flags); |
| 641 |
if (fs->fd < 0) { |
| 642 |
errno = -fs->fd; |
| 643 |
fs->fd = -1;
|
| 644 |
} |
| 645 |
return fs->fd;
|
| 646 |
} |
| 647 |
|
| 648 |
static int proxy_opendir(FsContext *ctx, |
| 649 |
V9fsPath *fs_path, V9fsFidOpenState *fs) |
| 650 |
{
|
| 651 |
int serrno, fd;
|
| 652 |
|
| 653 |
fs->dir = NULL;
|
| 654 |
fd = v9fs_request(ctx->private, T_OPEN, NULL, "sd", fs_path, O_DIRECTORY); |
| 655 |
if (fd < 0) { |
| 656 |
errno = -fd; |
| 657 |
return -1; |
| 658 |
} |
| 659 |
fs->dir = fdopendir(fd); |
| 660 |
if (!fs->dir) {
|
| 661 |
serrno = errno; |
| 662 |
close(fd); |
| 663 |
errno = serrno; |
| 664 |
return -1; |
| 665 |
} |
| 666 |
return 0; |
| 667 |
} |
| 668 |
|
| 669 |
static void proxy_rewinddir(FsContext *ctx, V9fsFidOpenState *fs) |
| 670 |
{
|
| 671 |
return rewinddir(fs->dir);
|
| 672 |
} |
| 673 |
|
| 674 |
static off_t proxy_telldir(FsContext *ctx, V9fsFidOpenState *fs)
|
| 675 |
{
|
| 676 |
return telldir(fs->dir);
|
| 677 |
} |
| 678 |
|
| 679 |
static int proxy_readdir_r(FsContext *ctx, V9fsFidOpenState *fs, |
| 680 |
struct dirent *entry,
|
| 681 |
struct dirent **result)
|
| 682 |
{
|
| 683 |
return readdir_r(fs->dir, entry, result);
|
| 684 |
} |
| 685 |
|
| 686 |
static void proxy_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off) |
| 687 |
{
|
| 688 |
return seekdir(fs->dir, off);
|
| 689 |
} |
| 690 |
|
| 691 |
static ssize_t proxy_preadv(FsContext *ctx, V9fsFidOpenState *fs,
|
| 692 |
const struct iovec *iov, |
| 693 |
int iovcnt, off_t offset)
|
| 694 |
{
|
| 695 |
#ifdef CONFIG_PREADV
|
| 696 |
return preadv(fs->fd, iov, iovcnt, offset);
|
| 697 |
#else
|
| 698 |
int err = lseek(fs->fd, offset, SEEK_SET);
|
| 699 |
if (err == -1) { |
| 700 |
return err;
|
| 701 |
} else {
|
| 702 |
return readv(fs->fd, iov, iovcnt);
|
| 703 |
} |
| 704 |
#endif
|
| 705 |
} |
| 706 |
|
| 707 |
static ssize_t proxy_pwritev(FsContext *ctx, V9fsFidOpenState *fs,
|
| 708 |
const struct iovec *iov, |
| 709 |
int iovcnt, off_t offset)
|
| 710 |
{
|
| 711 |
ssize_t ret; |
| 712 |
|
| 713 |
#ifdef CONFIG_PREADV
|
| 714 |
ret = pwritev(fs->fd, iov, iovcnt, offset); |
| 715 |
#else
|
| 716 |
int err = lseek(fs->fd, offset, SEEK_SET);
|
| 717 |
if (err == -1) { |
| 718 |
return err;
|
| 719 |
} else {
|
| 720 |
ret = writev(fs->fd, iov, iovcnt); |
| 721 |
} |
| 722 |
#endif
|
| 723 |
#ifdef CONFIG_SYNC_FILE_RANGE
|
| 724 |
if (ret > 0 && ctx->export_flags & V9FS_IMMEDIATE_WRITEOUT) { |
| 725 |
/*
|
| 726 |
* Initiate a writeback. This is not a data integrity sync.
|
| 727 |
* We want to ensure that we don't leave dirty pages in the cache
|
| 728 |
* after write when writeout=immediate is sepcified.
|
| 729 |
*/
|
| 730 |
sync_file_range(fs->fd, offset, ret, |
| 731 |
SYNC_FILE_RANGE_WAIT_BEFORE | SYNC_FILE_RANGE_WRITE); |
| 732 |
} |
| 733 |
#endif
|
| 734 |
return ret;
|
| 735 |
} |
| 736 |
|
| 737 |
static int proxy_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
| 738 |
{
|
| 739 |
int retval;
|
| 740 |
retval = v9fs_request(fs_ctx->private, T_CHMOD, NULL, "sd", |
| 741 |
fs_path, credp->fc_mode); |
| 742 |
if (retval < 0) { |
| 743 |
errno = -retval; |
| 744 |
} |
| 745 |
return retval;
|
| 746 |
} |
| 747 |
|
| 748 |
static int proxy_mknod(FsContext *fs_ctx, V9fsPath *dir_path, |
| 749 |
const char *name, FsCred *credp) |
| 750 |
{
|
| 751 |
int retval;
|
| 752 |
V9fsString fullname; |
| 753 |
|
| 754 |
v9fs_string_init(&fullname); |
| 755 |
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
|
| 756 |
|
| 757 |
retval = v9fs_request(fs_ctx->private, T_MKNOD, NULL, "sdqdd", |
| 758 |
&fullname, credp->fc_mode, credp->fc_rdev, |
| 759 |
credp->fc_uid, credp->fc_gid); |
| 760 |
v9fs_string_free(&fullname); |
| 761 |
if (retval < 0) { |
| 762 |
errno = -retval; |
| 763 |
retval = -1;
|
| 764 |
} |
| 765 |
return retval;
|
| 766 |
} |
| 767 |
|
| 768 |
static int proxy_mkdir(FsContext *fs_ctx, V9fsPath *dir_path, |
| 769 |
const char *name, FsCred *credp) |
| 770 |
{
|
| 771 |
int retval;
|
| 772 |
V9fsString fullname; |
| 773 |
|
| 774 |
v9fs_string_init(&fullname); |
| 775 |
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
|
| 776 |
|
| 777 |
retval = v9fs_request(fs_ctx->private, T_MKDIR, NULL, "sddd", &fullname, |
| 778 |
credp->fc_mode, credp->fc_uid, credp->fc_gid); |
| 779 |
v9fs_string_free(&fullname); |
| 780 |
if (retval < 0) { |
| 781 |
errno = -retval; |
| 782 |
retval = -1;
|
| 783 |
} |
| 784 |
v9fs_string_free(&fullname); |
| 785 |
return retval;
|
| 786 |
} |
| 787 |
|
| 788 |
static int proxy_fstat(FsContext *fs_ctx, int fid_type, |
| 789 |
V9fsFidOpenState *fs, struct stat *stbuf)
|
| 790 |
{
|
| 791 |
int fd;
|
| 792 |
|
| 793 |
if (fid_type == P9_FID_DIR) {
|
| 794 |
fd = dirfd(fs->dir); |
| 795 |
} else {
|
| 796 |
fd = fs->fd; |
| 797 |
} |
| 798 |
return fstat(fd, stbuf);
|
| 799 |
} |
| 800 |
|
| 801 |
static int proxy_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name, |
| 802 |
int flags, FsCred *credp, V9fsFidOpenState *fs)
|
| 803 |
{
|
| 804 |
V9fsString fullname; |
| 805 |
|
| 806 |
v9fs_string_init(&fullname); |
| 807 |
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
|
| 808 |
|
| 809 |
fs->fd = v9fs_request(fs_ctx->private, T_CREATE, NULL, "sdddd", |
| 810 |
&fullname, flags, credp->fc_mode, |
| 811 |
credp->fc_uid, credp->fc_gid); |
| 812 |
v9fs_string_free(&fullname); |
| 813 |
if (fs->fd < 0) { |
| 814 |
errno = -fs->fd; |
| 815 |
fs->fd = -1;
|
| 816 |
} |
| 817 |
return fs->fd;
|
| 818 |
} |
| 819 |
|
| 820 |
static int proxy_symlink(FsContext *fs_ctx, const char *oldpath, |
| 821 |
V9fsPath *dir_path, const char *name, FsCred *credp) |
| 822 |
{
|
| 823 |
int retval;
|
| 824 |
V9fsString fullname, target; |
| 825 |
|
| 826 |
v9fs_string_init(&fullname); |
| 827 |
v9fs_string_init(&target); |
| 828 |
|
| 829 |
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
|
| 830 |
v9fs_string_sprintf(&target, "%s", oldpath);
|
| 831 |
|
| 832 |
retval = v9fs_request(fs_ctx->private, T_SYMLINK, NULL, "ssdd", |
| 833 |
&target, &fullname, credp->fc_uid, credp->fc_gid); |
| 834 |
v9fs_string_free(&fullname); |
| 835 |
v9fs_string_free(&target); |
| 836 |
if (retval < 0) { |
| 837 |
errno = -retval; |
| 838 |
retval = -1;
|
| 839 |
} |
| 840 |
return retval;
|
| 841 |
} |
| 842 |
|
| 843 |
static int proxy_link(FsContext *ctx, V9fsPath *oldpath, |
| 844 |
V9fsPath *dirpath, const char *name) |
| 845 |
{
|
| 846 |
int retval;
|
| 847 |
V9fsString newpath; |
| 848 |
|
| 849 |
v9fs_string_init(&newpath); |
| 850 |
v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name);
|
| 851 |
|
| 852 |
retval = v9fs_request(ctx->private, T_LINK, NULL, "ss", oldpath, &newpath); |
| 853 |
v9fs_string_free(&newpath); |
| 854 |
if (retval < 0) { |
| 855 |
errno = -retval; |
| 856 |
retval = -1;
|
| 857 |
} |
| 858 |
return retval;
|
| 859 |
} |
| 860 |
|
| 861 |
static int proxy_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size) |
| 862 |
{
|
| 863 |
int retval;
|
| 864 |
|
| 865 |
retval = v9fs_request(ctx->private, T_TRUNCATE, NULL, "sq", fs_path, size); |
| 866 |
if (retval < 0) { |
| 867 |
errno = -retval; |
| 868 |
return -1; |
| 869 |
} |
| 870 |
return 0; |
| 871 |
} |
| 872 |
|
| 873 |
static int proxy_rename(FsContext *ctx, const char *oldpath, |
| 874 |
const char *newpath) |
| 875 |
{
|
| 876 |
int retval;
|
| 877 |
V9fsString oldname, newname; |
| 878 |
|
| 879 |
v9fs_string_init(&oldname); |
| 880 |
v9fs_string_init(&newname); |
| 881 |
|
| 882 |
v9fs_string_sprintf(&oldname, "%s", oldpath);
|
| 883 |
v9fs_string_sprintf(&newname, "%s", newpath);
|
| 884 |
retval = v9fs_request(ctx->private, T_RENAME, NULL, "ss", |
| 885 |
&oldname, &newname); |
| 886 |
v9fs_string_free(&oldname); |
| 887 |
v9fs_string_free(&newname); |
| 888 |
if (retval < 0) { |
| 889 |
errno = -retval; |
| 890 |
} |
| 891 |
return retval;
|
| 892 |
} |
| 893 |
|
| 894 |
static int proxy_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
| 895 |
{
|
| 896 |
int retval;
|
| 897 |
retval = v9fs_request(fs_ctx->private, T_CHOWN, NULL, "sdd", |
| 898 |
fs_path, credp->fc_uid, credp->fc_gid); |
| 899 |
if (retval < 0) { |
| 900 |
errno = -retval; |
| 901 |
} |
| 902 |
return retval;
|
| 903 |
} |
| 904 |
|
| 905 |
static int proxy_utimensat(FsContext *s, V9fsPath *fs_path, |
| 906 |
const struct timespec *buf) |
| 907 |
{
|
| 908 |
int retval;
|
| 909 |
retval = v9fs_request(s->private, T_UTIME, NULL, "sqqqq", |
| 910 |
fs_path, |
| 911 |
buf[0].tv_sec, buf[0].tv_nsec, |
| 912 |
buf[1].tv_sec, buf[1].tv_nsec); |
| 913 |
if (retval < 0) { |
| 914 |
errno = -retval; |
| 915 |
} |
| 916 |
return retval;
|
| 917 |
} |
| 918 |
|
| 919 |
static int proxy_remove(FsContext *ctx, const char *path) |
| 920 |
{
|
| 921 |
int retval;
|
| 922 |
V9fsString name; |
| 923 |
v9fs_string_init(&name); |
| 924 |
v9fs_string_sprintf(&name, "%s", path);
|
| 925 |
retval = v9fs_request(ctx->private, T_REMOVE, NULL, "s", &name); |
| 926 |
v9fs_string_free(&name); |
| 927 |
if (retval < 0) { |
| 928 |
errno = -retval; |
| 929 |
} |
| 930 |
return retval;
|
| 931 |
} |
| 932 |
|
| 933 |
static int proxy_fsync(FsContext *ctx, int fid_type, |
| 934 |
V9fsFidOpenState *fs, int datasync)
|
| 935 |
{
|
| 936 |
int fd;
|
| 937 |
|
| 938 |
if (fid_type == P9_FID_DIR) {
|
| 939 |
fd = dirfd(fs->dir); |
| 940 |
} else {
|
| 941 |
fd = fs->fd; |
| 942 |
} |
| 943 |
|
| 944 |
if (datasync) {
|
| 945 |
return qemu_fdatasync(fd);
|
| 946 |
} else {
|
| 947 |
return fsync(fd);
|
| 948 |
} |
| 949 |
} |
| 950 |
|
| 951 |
static int proxy_statfs(FsContext *s, V9fsPath *fs_path, struct statfs *stbuf) |
| 952 |
{
|
| 953 |
int retval;
|
| 954 |
retval = v9fs_request(s->private, T_STATFS, stbuf, "s", fs_path);
|
| 955 |
if (retval < 0) { |
| 956 |
errno = -retval; |
| 957 |
return -1; |
| 958 |
} |
| 959 |
return retval;
|
| 960 |
} |
| 961 |
|
| 962 |
static ssize_t proxy_lgetxattr(FsContext *ctx, V9fsPath *fs_path,
|
| 963 |
const char *name, void *value, size_t size) |
| 964 |
{
|
| 965 |
int retval;
|
| 966 |
V9fsString xname; |
| 967 |
|
| 968 |
v9fs_string_init(&xname); |
| 969 |
v9fs_string_sprintf(&xname, "%s", name);
|
| 970 |
retval = v9fs_request(ctx->private, T_LGETXATTR, value, "dss", size,
|
| 971 |
fs_path, &xname); |
| 972 |
v9fs_string_free(&xname); |
| 973 |
if (retval < 0) { |
| 974 |
errno = -retval; |
| 975 |
} |
| 976 |
return retval;
|
| 977 |
} |
| 978 |
|
| 979 |
static ssize_t proxy_llistxattr(FsContext *ctx, V9fsPath *fs_path,
|
| 980 |
void *value, size_t size)
|
| 981 |
{
|
| 982 |
int retval;
|
| 983 |
retval = v9fs_request(ctx->private, T_LLISTXATTR, value, "ds", size,
|
| 984 |
fs_path); |
| 985 |
if (retval < 0) { |
| 986 |
errno = -retval; |
| 987 |
} |
| 988 |
return retval;
|
| 989 |
} |
| 990 |
|
| 991 |
static int proxy_lsetxattr(FsContext *ctx, V9fsPath *fs_path, const char *name, |
| 992 |
void *value, size_t size, int flags) |
| 993 |
{
|
| 994 |
int retval;
|
| 995 |
V9fsString xname, xvalue; |
| 996 |
|
| 997 |
v9fs_string_init(&xname); |
| 998 |
v9fs_string_sprintf(&xname, "%s", name);
|
| 999 |
|
| 1000 |
v9fs_string_init(&xvalue); |
| 1001 |
xvalue.size = size; |
| 1002 |
xvalue.data = g_malloc(size); |
| 1003 |
memcpy(xvalue.data, value, size); |
| 1004 |
|
| 1005 |
retval = v9fs_request(ctx->private, T_LSETXATTR, value, "sssdd",
|
| 1006 |
fs_path, &xname, &xvalue, size, flags); |
| 1007 |
v9fs_string_free(&xname); |
| 1008 |
v9fs_string_free(&xvalue); |
| 1009 |
if (retval < 0) { |
| 1010 |
errno = -retval; |
| 1011 |
} |
| 1012 |
return retval;
|
| 1013 |
} |
| 1014 |
|
| 1015 |
static int proxy_lremovexattr(FsContext *ctx, V9fsPath *fs_path, |
| 1016 |
const char *name) |
| 1017 |
{
|
| 1018 |
int retval;
|
| 1019 |
V9fsString xname; |
| 1020 |
|
| 1021 |
v9fs_string_init(&xname); |
| 1022 |
v9fs_string_sprintf(&xname, "%s", name);
|
| 1023 |
retval = v9fs_request(ctx->private, T_LREMOVEXATTR, NULL, "ss", |
| 1024 |
fs_path, &xname); |
| 1025 |
v9fs_string_free(&xname); |
| 1026 |
if (retval < 0) { |
| 1027 |
errno = -retval; |
| 1028 |
} |
| 1029 |
return retval;
|
| 1030 |
} |
| 1031 |
|
| 1032 |
static int proxy_name_to_path(FsContext *ctx, V9fsPath *dir_path, |
| 1033 |
const char *name, V9fsPath *target) |
| 1034 |
{
|
| 1035 |
if (dir_path) {
|
| 1036 |
v9fs_string_sprintf((V9fsString *)target, "%s/%s",
|
| 1037 |
dir_path->data, name); |
| 1038 |
} else {
|
| 1039 |
v9fs_string_sprintf((V9fsString *)target, "%s", name);
|
| 1040 |
} |
| 1041 |
/* Bump the size for including terminating NULL */
|
| 1042 |
target->size++; |
| 1043 |
return 0; |
| 1044 |
} |
| 1045 |
|
| 1046 |
static int proxy_renameat(FsContext *ctx, V9fsPath *olddir, |
| 1047 |
const char *old_name, V9fsPath *newdir, |
| 1048 |
const char *new_name) |
| 1049 |
{
|
| 1050 |
int ret;
|
| 1051 |
V9fsString old_full_name, new_full_name; |
| 1052 |
|
| 1053 |
v9fs_string_init(&old_full_name); |
| 1054 |
v9fs_string_init(&new_full_name); |
| 1055 |
|
| 1056 |
v9fs_string_sprintf(&old_full_name, "%s/%s", olddir->data, old_name);
|
| 1057 |
v9fs_string_sprintf(&new_full_name, "%s/%s", newdir->data, new_name);
|
| 1058 |
|
| 1059 |
ret = proxy_rename(ctx, old_full_name.data, new_full_name.data); |
| 1060 |
v9fs_string_free(&old_full_name); |
| 1061 |
v9fs_string_free(&new_full_name); |
| 1062 |
return ret;
|
| 1063 |
} |
| 1064 |
|
| 1065 |
static int proxy_unlinkat(FsContext *ctx, V9fsPath *dir, |
| 1066 |
const char *name, int flags) |
| 1067 |
{
|
| 1068 |
int ret;
|
| 1069 |
V9fsString fullname; |
| 1070 |
v9fs_string_init(&fullname); |
| 1071 |
|
| 1072 |
v9fs_string_sprintf(&fullname, "%s/%s", dir->data, name);
|
| 1073 |
ret = proxy_remove(ctx, fullname.data); |
| 1074 |
v9fs_string_free(&fullname); |
| 1075 |
|
| 1076 |
return ret;
|
| 1077 |
} |
| 1078 |
|
| 1079 |
static int proxy_ioc_getversion(FsContext *fs_ctx, V9fsPath *path, |
| 1080 |
mode_t st_mode, uint64_t *st_gen) |
| 1081 |
{
|
| 1082 |
int err;
|
| 1083 |
|
| 1084 |
/* Do not try to open special files like device nodes, fifos etc
|
| 1085 |
* we can get fd for regular files and directories only
|
| 1086 |
*/
|
| 1087 |
if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) {
|
| 1088 |
return 0; |
| 1089 |
} |
| 1090 |
err = v9fs_request(fs_ctx->private, T_GETVERSION, st_gen, "s", path);
|
| 1091 |
if (err < 0) { |
| 1092 |
errno = -err; |
| 1093 |
err = -1;
|
| 1094 |
} |
| 1095 |
return err;
|
| 1096 |
} |
| 1097 |
|
| 1098 |
static int connect_namedsocket(const char *path) |
| 1099 |
{
|
| 1100 |
int sockfd, size;
|
| 1101 |
struct sockaddr_un helper;
|
| 1102 |
|
| 1103 |
sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
|
| 1104 |
if (sockfd < 0) { |
| 1105 |
fprintf(stderr, "socket %s\n", strerror(errno));
|
| 1106 |
return -1; |
| 1107 |
} |
| 1108 |
strcpy(helper.sun_path, path); |
| 1109 |
helper.sun_family = AF_UNIX; |
| 1110 |
size = strlen(helper.sun_path) + sizeof(helper.sun_family);
|
| 1111 |
if (connect(sockfd, (struct sockaddr *)&helper, size) < 0) { |
| 1112 |
fprintf(stderr, "socket error\n");
|
| 1113 |
return -1; |
| 1114 |
} |
| 1115 |
|
| 1116 |
/* remove the socket for security reasons */
|
| 1117 |
unlink(path); |
| 1118 |
return sockfd;
|
| 1119 |
} |
| 1120 |
|
| 1121 |
static int proxy_parse_opts(QemuOpts *opts, struct FsDriverEntry *fs) |
| 1122 |
{
|
| 1123 |
const char *socket = qemu_opt_get(opts, "socket"); |
| 1124 |
const char *sock_fd = qemu_opt_get(opts, "sock_fd"); |
| 1125 |
|
| 1126 |
if (!socket && !sock_fd) {
|
| 1127 |
fprintf(stderr, "socket and sock_fd none of the option specified\n");
|
| 1128 |
return -1; |
| 1129 |
} |
| 1130 |
if (socket && sock_fd) {
|
| 1131 |
fprintf(stderr, "Both socket and sock_fd options specified\n");
|
| 1132 |
return -1; |
| 1133 |
} |
| 1134 |
if (socket) {
|
| 1135 |
fs->path = g_strdup(socket); |
| 1136 |
fs->export_flags = V9FS_PROXY_SOCK_NAME; |
| 1137 |
} else {
|
| 1138 |
fs->path = g_strdup(sock_fd); |
| 1139 |
fs->export_flags = V9FS_PROXY_SOCK_FD; |
| 1140 |
} |
| 1141 |
return 0; |
| 1142 |
} |
| 1143 |
|
| 1144 |
static int proxy_init(FsContext *ctx) |
| 1145 |
{
|
| 1146 |
V9fsProxy *proxy = g_malloc(sizeof(V9fsProxy));
|
| 1147 |
int sock_id;
|
| 1148 |
|
| 1149 |
if (ctx->export_flags & V9FS_PROXY_SOCK_NAME) {
|
| 1150 |
sock_id = connect_namedsocket(ctx->fs_root); |
| 1151 |
} else {
|
| 1152 |
sock_id = atoi(ctx->fs_root); |
| 1153 |
if (sock_id < 0) { |
| 1154 |
fprintf(stderr, "socket descriptor not initialized\n");
|
| 1155 |
return -1; |
| 1156 |
} |
| 1157 |
} |
| 1158 |
g_free(ctx->fs_root); |
| 1159 |
|
| 1160 |
proxy->in_iovec.iov_base = g_malloc(PROXY_MAX_IO_SZ + PROXY_HDR_SZ); |
| 1161 |
proxy->in_iovec.iov_len = PROXY_MAX_IO_SZ + PROXY_HDR_SZ; |
| 1162 |
proxy->out_iovec.iov_base = g_malloc(PROXY_MAX_IO_SZ + PROXY_HDR_SZ); |
| 1163 |
proxy->out_iovec.iov_len = PROXY_MAX_IO_SZ + PROXY_HDR_SZ; |
| 1164 |
|
| 1165 |
ctx->private = proxy; |
| 1166 |
proxy->sockfd = sock_id; |
| 1167 |
qemu_mutex_init(&proxy->mutex); |
| 1168 |
|
| 1169 |
ctx->export_flags |= V9FS_PATHNAME_FSCONTEXT; |
| 1170 |
ctx->exops.get_st_gen = proxy_ioc_getversion; |
| 1171 |
return 0; |
| 1172 |
} |
| 1173 |
|
| 1174 |
FileOperations proxy_ops = {
|
| 1175 |
.parse_opts = proxy_parse_opts, |
| 1176 |
.init = proxy_init, |
| 1177 |
.lstat = proxy_lstat, |
| 1178 |
.readlink = proxy_readlink, |
| 1179 |
.close = proxy_close, |
| 1180 |
.closedir = proxy_closedir, |
| 1181 |
.open = proxy_open, |
| 1182 |
.opendir = proxy_opendir, |
| 1183 |
.rewinddir = proxy_rewinddir, |
| 1184 |
.telldir = proxy_telldir, |
| 1185 |
.readdir_r = proxy_readdir_r, |
| 1186 |
.seekdir = proxy_seekdir, |
| 1187 |
.preadv = proxy_preadv, |
| 1188 |
.pwritev = proxy_pwritev, |
| 1189 |
.chmod = proxy_chmod, |
| 1190 |
.mknod = proxy_mknod, |
| 1191 |
.mkdir = proxy_mkdir, |
| 1192 |
.fstat = proxy_fstat, |
| 1193 |
.open2 = proxy_open2, |
| 1194 |
.symlink = proxy_symlink, |
| 1195 |
.link = proxy_link, |
| 1196 |
.truncate = proxy_truncate, |
| 1197 |
.rename = proxy_rename, |
| 1198 |
.chown = proxy_chown, |
| 1199 |
.utimensat = proxy_utimensat, |
| 1200 |
.remove = proxy_remove, |
| 1201 |
.fsync = proxy_fsync, |
| 1202 |
.statfs = proxy_statfs, |
| 1203 |
.lgetxattr = proxy_lgetxattr, |
| 1204 |
.llistxattr = proxy_llistxattr, |
| 1205 |
.lsetxattr = proxy_lsetxattr, |
| 1206 |
.lremovexattr = proxy_lremovexattr, |
| 1207 |
.name_to_path = proxy_name_to_path, |
| 1208 |
.renameat = proxy_renameat, |
| 1209 |
.unlinkat = proxy_unlinkat, |
| 1210 |
}; |