static int do_readlink(struct iovec *iovec, struct iovec *out_iovec)
{
char *buffer;
int size, retval;
V9fsString target, path;
v9fs_string_init(&path);
retval = proxy_unmarshal(iovec, PROXY_HDR_SZ, "sd", &path, &size);
if (retval < 0) {
v9fs_string_free(&path);
return retval;
}
buffer = g_malloc(size);
v9fs_string_init(&target);
retval = readlink(path.data, buffer, size - 1);
if (retval > 0) {
buffer[retval] = '\0';
v9fs_string_sprintf(&target, "%s", buffer);
retval = proxy_marshal(out_iovec, PROXY_HDR_SZ, "s", &target);
} else {
retval = -errno;
}
g_free(buffer);
v9fs_string_free(&target);
v9fs_string_free(&path);
return retval;
}
/*
* create other filesystem objects and send 0 on success
* return -errno on error
*/
static int do_create_others(int type, struct iovec *iovec)
{
dev_t rdev;
int retval = 0;
int offset = PROXY_HDR_SZ;
V9fsString oldpath, path;
int mode, uid, gid, cur_uid, cur_gid;
v9fs_string_init(&path);
v9fs_string_init(&oldpath);
cur_uid = geteuid();
cur_gid = getegid();
retval = proxy_unmarshal(iovec, offset, "dd", &uid, &gid);
if (retval < 0) {
return retval;
}
offset += retval;
retval = setfsugid(uid, gid);
if (retval < 0) {
retval = -errno;
goto err_out;
}
switch (type) {
case T_MKNOD:
retval = proxy_unmarshal(iovec, offset, "sdq", &path, &mode, &rdev);
if (retval < 0) {
goto err_out;
}
retval = mknod(path.data, mode, rdev);
break;
case T_MKDIR:
retval = proxy_unmarshal(iovec, offset, "sd", &path, &mode);
if (retval < 0) {
goto err_out;
}
retval = mkdir(path.data, mode);
break;
case T_SYMLINK:
retval = proxy_unmarshal(iovec, offset, "ss", &oldpath, &path);
if (retval < 0) {
goto err_out;
}
retval = symlink(oldpath.data, path.data);
break;
}
if (retval < 0) {
retval = -errno;
}
err_out:
v9fs_string_free(&path);
v9fs_string_free(&oldpath);
setfsugid(cur_uid, cur_gid);
return retval;
}
static int do_getxattr(int type, struct iovec *iovec, struct iovec *out_iovec)
{
int size = 0, offset, retval;
V9fsString path, name, xattr;
v9fs_string_init(&xattr);
v9fs_string_init(&path);
retval = proxy_unmarshal(iovec, PROXY_HDR_SZ, "ds", &size, &path);
if (retval < 0) {
return retval;
}
offset = PROXY_HDR_SZ + retval;
if (size) {
xattr.data = g_malloc(size);
xattr.size = size;
}
switch (type) {
case T_LGETXATTR:
v9fs_string_init(&name);
retval = proxy_unmarshal(iovec, offset, "s", &name);
if (retval > 0) {
retval = lgetxattr(path.data, name.data, xattr.data, size);
if (retval < 0) {
retval = -errno;
} else {
xattr.size = retval;
}
}
v9fs_string_free(&name);
break;
case T_LLISTXATTR:
retval = llistxattr(path.data, xattr.data, size);
if (retval < 0) {
retval = -errno;
} else {
xattr.size = retval;
}
break;
}
if (retval < 0) {
goto err_out;
}
if (!size) {
proxy_marshal(out_iovec, PROXY_HDR_SZ, "d", retval);
retval = sizeof(retval);
} else {
retval = proxy_marshal(out_iovec, PROXY_HDR_SZ, "s", &xattr);
}
err_out:
v9fs_string_free(&xattr);
v9fs_string_free(&path);
return retval;
}
static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path,
const char *name, FsCred *credp)
{
char *path;
int err = -1;
int serrno = 0;
V9fsString fullname;
char *buffer = NULL;
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
path = fullname.data;
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
buffer = rpath(fs_ctx, path);
err = mknod(buffer, SM_LOCAL_MODE_BITS|S_IFREG, 0);
if (err == -1) {
goto out;
}
err = local_set_xattr(buffer, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
buffer = rpath(fs_ctx, path);
err = mknod(buffer, SM_LOCAL_MODE_BITS|S_IFREG, 0);
if (err == -1) {
goto out;
}
err = local_set_mapped_file_attr(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
buffer = rpath(fs_ctx, path);
err = mknod(buffer, credp->fc_mode, credp->fc_rdev);
if (err == -1) {
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
}
goto out;
err_end:
remove(buffer);
errno = serrno;
out:
g_free(buffer);
v9fs_string_free(&fullname);
return err;
}
static int local_link(FsContext *ctx, V9fsPath *oldpath,
V9fsPath *dirpath, const char *name)
{
int ret;
V9fsString newpath;
char buffer[PATH_MAX], buffer1[PATH_MAX];
v9fs_string_init(&newpath);
v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name);
ret = link(rpath(ctx, oldpath->data, buffer),
rpath(ctx, newpath.data, buffer1));
/* now link the virtfs_metadata files */
if (!ret && (ctx->export_flags & V9FS_SM_MAPPED_FILE)) {
/* Link the .virtfs_metadata files. Create the metada directory */
ret = local_create_mapped_attr_dir(ctx, newpath.data);
if (ret < 0) {
goto err_out;
}
ret = link(local_mapped_attr_path(ctx, oldpath->data, buffer),
local_mapped_attr_path(ctx, newpath.data, buffer1));
if (ret < 0 && errno != ENOENT) {
goto err_out;
}
}
err_out:
v9fs_string_free(&newpath);
return ret;
}
/*
* create a file and send fd on success
* return -errno on error
*/
static int do_create(struct iovec *iovec)
{
int ret;
V9fsString path;
int flags, mode, uid, gid, cur_uid, cur_gid;
v9fs_string_init(&path);
ret = proxy_unmarshal(iovec, PROXY_HDR_SZ, "sdddd",
&path, &flags, &mode, &uid, &gid);
if (ret < 0) {
goto unmarshal_err_out;
}
cur_uid = geteuid();
cur_gid = getegid();
ret = setfsugid(uid, gid);
if (ret < 0) {
/*
* On failure reset back to the
* old uid/gid
*/
ret = -errno;
goto err_out;
}
ret = open(path.data, flags, mode);
if (ret < 0) {
LOGV("%s: Could not open file: %s", __func__, path.data);
ret = -errno;
}
err_out:
setfsugid(cur_uid, cur_gid);
unmarshal_err_out:
v9fs_string_free(&path);
return ret;
}
/*
* create a file and send fd on success
* return -errno on error
*/
static int do_create(struct iovec *iovec)
{
int ret;
V9fsString path;
int flags, mode, uid, gid, cur_uid, cur_gid;
v9fs_string_init(&path);
ret = proxy_unmarshal(iovec, PROXY_HDR_SZ, "sdddd",
&path, &flags, &mode, &uid, &gid);
if (ret < 0) {
goto unmarshal_err_out;
}
ret = setugid(uid, gid, &cur_uid, &cur_gid);
if (ret < 0) {
goto unmarshal_err_out;
}
ret = open(path.data, flags, mode);
if (ret < 0) {
ret = -errno;
}
resetugid(cur_uid, cur_gid);
unmarshal_err_out:
v9fs_string_free(&path);
return ret;
}
static int local_renameat(FsContext *ctx, V9fsPath *olddir,
const char *old_name, V9fsPath *newdir,
const char *new_name)
{
int ret;
V9fsString old_full_name, new_full_name;
v9fs_string_init(&old_full_name);
v9fs_string_init(&new_full_name);
v9fs_string_sprintf(&old_full_name, "%s/%s", olddir->data, old_name);
v9fs_string_sprintf(&new_full_name, "%s/%s", newdir->data, new_name);
ret = local_rename(ctx, old_full_name.data, new_full_name.data);
v9fs_string_free(&old_full_name);
v9fs_string_free(&new_full_name);
return ret;
}
static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
int flags, FsCred *credp, V9fsFidOpenState *fs)
{
char *path;
int fd = -1;
int err = -1;
int serrno = 0;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
path = fullname.data;
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS);
if (fd == -1) {
err = fd;
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFREG;
/* Set cleint credentials in xattr */
err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
fd = open(rpath(fs_ctx, path, buffer), flags, credp->fc_mode);
if (fd == -1) {
err = fd;
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
}
err = fd;
fs->fd = fd;
goto out;
err_end:
close(fd);
remove(rpath(fs_ctx, path, buffer));
errno = serrno;
out:
v9fs_string_free(&fullname);
return err;
}
/*
* Gets stat/statfs information and packs in out_iovec structure
* on success returns number of bytes packed in out_iovec struture
* otherwise returns -errno
*/
static int do_stat(int type, struct iovec *iovec, struct iovec *out_iovec)
{
int retval;
V9fsString path;
ProxyStat pr_stat;
ProxyStatFS pr_stfs;
struct stat st_buf;
struct statfs stfs_buf;
v9fs_string_init(&path);
retval = proxy_unmarshal(iovec, PROXY_HDR_SZ, "s", &path);
if (retval < 0) {
return retval;
}
switch (type) {
case T_LSTAT:
retval = lstat(path.data, &st_buf);
if (retval < 0) {
retval = -errno;
} else {
stat_to_prstat(&pr_stat, &st_buf);
retval = proxy_marshal(out_iovec, PROXY_HDR_SZ,
"qqqdddqqqqqqqqqq", pr_stat.st_dev,
pr_stat.st_ino, pr_stat.st_nlink,
pr_stat.st_mode, pr_stat.st_uid,
pr_stat.st_gid, pr_stat.st_rdev,
pr_stat.st_size, pr_stat.st_blksize,
pr_stat.st_blocks,
pr_stat.st_atim_sec, pr_stat.st_atim_nsec,
pr_stat.st_mtim_sec, pr_stat.st_mtim_nsec,
pr_stat.st_ctim_sec, pr_stat.st_ctim_nsec);
}
break;
case T_STATFS:
retval = statfs(path.data, &stfs_buf);
if (retval < 0) {
retval = -errno;
} else {
statfs_to_prstatfs(&pr_stfs, &stfs_buf);
retval = proxy_marshal(out_iovec, PROXY_HDR_SZ,
"qqqqqqqqqqq", pr_stfs.f_type,
pr_stfs.f_bsize, pr_stfs.f_blocks,
pr_stfs.f_bfree, pr_stfs.f_bavail,
pr_stfs.f_files, pr_stfs.f_ffree,
pr_stfs.f_fsid[0], pr_stfs.f_fsid[1],
pr_stfs.f_namelen, pr_stfs.f_frsize);
}
break;
}
v9fs_string_free(&path);
return retval;
}
static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
const char *name, int flags)
{
int ret;
V9fsString fullname;
char *buffer;
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir->data, name);
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
if (flags == AT_REMOVEDIR) {
/*
* If directory remove .virtfs_metadata contained in the
* directory
*/
buffer = g_strdup_printf("%s/%s/%s", ctx->fs_root,
fullname.data, VIRTFS_META_DIR);
ret = remove(buffer);
g_free(buffer);
if (ret < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
* in non-mapped mode ?. Ignore ENOENT.
*/
goto err_out;
}
}
/*
* Now remove the name from parent directory
* .virtfs_metadata directory.
*/
buffer = local_mapped_attr_path(ctx, fullname.data);
ret = remove(buffer);
g_free(buffer);
if (ret < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
* in non-mapped mode ?. Ignore ENOENT.
*/
goto err_out;
}
}
/* Remove the name finally */
buffer = rpath(ctx, fullname.data);
ret = remove(buffer);
g_free(buffer);
err_out:
v9fs_string_free(&fullname);
return ret;
}
static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
const char *name, int flags)
{
int ret;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir->data, name);
ret = remove(rpath(ctx, fullname.data, buffer));
v9fs_string_free(&fullname);
return ret;
}
static int local_link(FsContext *ctx, V9fsPath *oldpath,
V9fsPath *dirpath, const char *name)
{
int ret;
V9fsString newpath;
char buffer[PATH_MAX], buffer1[PATH_MAX];
v9fs_string_init(&newpath);
v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name);
ret = link(rpath(ctx, oldpath->data, buffer),
rpath(ctx, newpath.data, buffer1));
v9fs_string_free(&newpath);
return ret;
}
static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path,
const char *name, FsCred *credp)
{
char *path;
int err = -1;
int serrno = 0;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
path = fullname.data;
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
err = mkdir(rpath(fs_ctx, path, buffer), SM_LOCAL_DIR_MODE_BITS);
if (err == -1) {
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFDIR;
err = local_set_xattr(rpath(fs_ctx, path, buffer), credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
err = mkdir(rpath(fs_ctx, path, buffer), credp->fc_mode);
if (err == -1) {
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
}
goto out;
err_end:
remove(rpath(fs_ctx, path, buffer));
errno = serrno;
out:
v9fs_string_free(&fullname);
return err;
}
/*
* open a file and send fd on success
* return -errno on error
*/
static int do_open(struct iovec *iovec)
{
int flags, ret;
V9fsString path;
v9fs_string_init(&path);
ret = proxy_unmarshal(iovec, PROXY_HDR_SZ, "sd", &path, &flags);
if (ret < 0) {
goto err_out;
}
ret = open(path.data, flags);
if (ret < 0) {
ret = -errno;
}
err_out:
v9fs_string_free(&path);
return ret;
}
static int local_symlink(FsContext *fs_ctx, const char *oldpath,
V9fsPath *dir_path, const char *name, FsCred *credp)
{
int err = -1;
int serrno = 0;
char *newpath;
V9fsString fullname;
char buffer[PATH_MAX];
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
newpath = fullname.data;
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
int fd;
ssize_t oldpath_size, write_size;
fd = open(rpath(fs_ctx, newpath, buffer),
O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW,
SM_LOCAL_MODE_BITS);
if (fd == -1) {
err = fd;
goto out;
}
/* Write the oldpath (target) to the file. */
oldpath_size = strlen(oldpath);
do {
write_size = write(fd, (void *)oldpath, oldpath_size);
} while (write_size == -1 && errno == EINTR);
if (write_size != oldpath_size) {
serrno = errno;
close(fd);
err = -1;
goto err_end;
}
close(fd);
/* Set cleint credentials in symlink's xattr */
credp->fc_mode = credp->fc_mode|S_IFLNK;
err = local_set_xattr(rpath(fs_ctx, newpath, buffer), credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
int fd;
ssize_t oldpath_size, write_size;
fd = open(rpath(fs_ctx, newpath, buffer),
O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW,
SM_LOCAL_MODE_BITS);
if (fd == -1) {
err = fd;
goto out;
}
/* Write the oldpath (target) to the file. */
oldpath_size = strlen(oldpath);
do {
write_size = write(fd, (void *)oldpath, oldpath_size);
} while (write_size == -1 && errno == EINTR);
if (write_size != oldpath_size) {
serrno = errno;
close(fd);
err = -1;
goto err_end;
}
close(fd);
/* Set cleint credentials in symlink's xattr */
credp->fc_mode = credp->fc_mode|S_IFLNK;
err = local_set_mapped_file_attr(fs_ctx, newpath, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
err = symlink(oldpath, rpath(fs_ctx, newpath, buffer));
if (err) {
goto out;
}
err = lchown(rpath(fs_ctx, newpath, buffer), credp->fc_uid,
credp->fc_gid);
if (err == -1) {
/*
* If we fail to change ownership and if we are
* using security model none. Ignore the error
*/
if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) {
serrno = errno;
goto err_end;
} else
err = 0;
}
}
goto out;
err_end:
remove(rpath(fs_ctx, newpath, buffer));
errno = serrno;
out:
v9fs_string_free(&fullname);
return err;
}
/*
* Response contains two parts
* {header, data}
* header.type == T_ERROR, data -> -errno
* header.type == T_SUCCESS, data -> response
* size of errno/response is given by header.size
* returns < 0, on transport error. response is
* valid only if status >= 0.
*/
static int v9fs_receive_response(V9fsProxy *proxy, int type,
int *status, void *response)
{
int retval;
ProxyHeader header;
struct iovec *reply = &proxy->in_iovec;
*status = 0;
reply->iov_len = 0;
retval = socket_read(proxy->sockfd, reply->iov_base, PROXY_HDR_SZ);
if (retval < 0) {
return retval;
}
reply->iov_len = PROXY_HDR_SZ;
proxy_unmarshal(reply, 0, "dd", &header.type, &header.size);
/*
* if response size > PROXY_MAX_IO_SZ, read the response but ignore it and
* return -ENOBUFS
*/
if (header.size > PROXY_MAX_IO_SZ) {
int count;
while (header.size > 0) {
count = MIN(PROXY_MAX_IO_SZ, header.size);
count = socket_read(proxy->sockfd, reply->iov_base, count);
if (count < 0) {
return count;
}
header.size -= count;
}
*status = -ENOBUFS;
return 0;
}
retval = socket_read(proxy->sockfd,
reply->iov_base + PROXY_HDR_SZ, header.size);
if (retval < 0) {
return retval;
}
reply->iov_len += header.size;
/* there was an error during processing request */
if (header.type == T_ERROR) {
int ret;
ret = proxy_unmarshal(reply, PROXY_HDR_SZ, "d", status);
if (ret < 0) {
*status = ret;
}
return 0;
}
switch (type) {
case T_LSTAT: {
ProxyStat prstat;
retval = proxy_unmarshal(reply, PROXY_HDR_SZ,
"qqqdddqqqqqqqqqq", &prstat.st_dev,
&prstat.st_ino, &prstat.st_nlink,
&prstat.st_mode, &prstat.st_uid,
&prstat.st_gid, &prstat.st_rdev,
&prstat.st_size, &prstat.st_blksize,
&prstat.st_blocks,
&prstat.st_atim_sec, &prstat.st_atim_nsec,
&prstat.st_mtim_sec, &prstat.st_mtim_nsec,
&prstat.st_ctim_sec, &prstat.st_ctim_nsec);
prstat_to_stat(response, &prstat);
break;
}
case T_STATFS: {
ProxyStatFS prstfs;
retval = proxy_unmarshal(reply, PROXY_HDR_SZ,
"qqqqqqqqqqq", &prstfs.f_type,
&prstfs.f_bsize, &prstfs.f_blocks,
&prstfs.f_bfree, &prstfs.f_bavail,
&prstfs.f_files, &prstfs.f_ffree,
&prstfs.f_fsid[0], &prstfs.f_fsid[1],
&prstfs.f_namelen, &prstfs.f_frsize);
prstatfs_to_statfs(response, &prstfs);
break;
}
case T_READLINK: {
V9fsString target;
v9fs_string_init(&target);
retval = proxy_unmarshal(reply, PROXY_HDR_SZ, "s", &target);
strcpy(response, target.data);
v9fs_string_free(&target);
break;
}
case T_LGETXATTR:
case T_LLISTXATTR: {
V9fsString xattr;
v9fs_string_init(&xattr);
retval = proxy_unmarshal(reply, PROXY_HDR_SZ, "s", &xattr);
memcpy(response, xattr.data, xattr.size);
v9fs_string_free(&xattr);
break;
}
case T_GETVERSION:
proxy_unmarshal(reply, PROXY_HDR_SZ, "q", response);
break;
default:
return -1;
}
if (retval < 0) {
*status = retval;
}
return 0;
}
static int process_requests(int sock)
{
int flags;
int size = 0;
int retval = 0;
uint64_t offset;
ProxyHeader header;
int mode, uid, gid;
V9fsString name, value;
struct timespec spec[2];
V9fsString oldpath, path;
struct iovec in_iovec, out_iovec;
in_iovec.iov_base = g_malloc(PROXY_MAX_IO_SZ + PROXY_HDR_SZ);
in_iovec.iov_len = PROXY_MAX_IO_SZ + PROXY_HDR_SZ;
out_iovec.iov_base = g_malloc(PROXY_MAX_IO_SZ + PROXY_HDR_SZ);
out_iovec.iov_len = PROXY_MAX_IO_SZ + PROXY_HDR_SZ;
while (1) {
/*
* initialize the header type, so that we send
* response to proper request type.
*/
header.type = 0;
retval = read_request(sock, &in_iovec, &header);
if (retval < 0) {
goto err_out;
}
switch (header.type) {
case T_OPEN:
retval = do_open(&in_iovec);
break;
case T_CREATE:
retval = do_create(&in_iovec);
break;
case T_MKNOD:
case T_MKDIR:
case T_SYMLINK:
retval = do_create_others(header.type, &in_iovec);
break;
case T_LINK:
v9fs_string_init(&path);
v9fs_string_init(&oldpath);
retval = proxy_unmarshal(&in_iovec, PROXY_HDR_SZ,
"ss", &oldpath, &path);
if (retval > 0) {
retval = link(oldpath.data, path.data);
if (retval < 0) {
retval = -errno;
}
}
v9fs_string_free(&oldpath);
v9fs_string_free(&path);
break;
case T_LSTAT:
case T_STATFS:
retval = do_stat(header.type, &in_iovec, &out_iovec);
break;
case T_READLINK:
retval = do_readlink(&in_iovec, &out_iovec);
break;
case T_CHMOD:
v9fs_string_init(&path);
retval = proxy_unmarshal(&in_iovec, PROXY_HDR_SZ,
"sd", &path, &mode);
if (retval > 0) {
retval = chmod(path.data, mode);
if (retval < 0) {
retval = -errno;
}
}
v9fs_string_free(&path);
break;
case T_CHOWN:
v9fs_string_init(&path);
retval = proxy_unmarshal(&in_iovec, PROXY_HDR_SZ, "sdd", &path,
&uid, &gid);
if (retval > 0) {
retval = lchown(path.data, uid, gid);
if (retval < 0) {
retval = -errno;
}
}
v9fs_string_free(&path);
break;
case T_TRUNCATE:
v9fs_string_init(&path);
retval = proxy_unmarshal(&in_iovec, PROXY_HDR_SZ, "sq",
&path, &offset);
if (retval > 0) {
retval = truncate(path.data, offset);
if (retval < 0) {
retval = -errno;
}
}
v9fs_string_free(&path);
break;
case T_UTIME:
v9fs_string_init(&path);
retval = proxy_unmarshal(&in_iovec, PROXY_HDR_SZ, "sqqqq", &path,
&spec[0].tv_sec, &spec[0].tv_nsec,
&spec[1].tv_sec, &spec[1].tv_nsec);
if (retval > 0) {
retval = utimensat(AT_FDCWD, path.data, spec,
AT_SYMLINK_NOFOLLOW);
if (retval < 0) {
retval = -errno;
}
}
v9fs_string_free(&path);
break;
case T_RENAME:
v9fs_string_init(&path);
v9fs_string_init(&oldpath);
retval = proxy_unmarshal(&in_iovec, PROXY_HDR_SZ,
"ss", &oldpath, &path);
if (retval > 0) {
retval = rename(oldpath.data, path.data);
if (retval < 0) {
retval = -errno;
}
}
v9fs_string_free(&oldpath);
v9fs_string_free(&path);
break;
case T_REMOVE:
v9fs_string_init(&path);
retval = proxy_unmarshal(&in_iovec, PROXY_HDR_SZ, "s", &path);
if (retval > 0) {
retval = remove(path.data);
if (retval < 0) {
retval = -errno;
}
}
v9fs_string_free(&path);
break;
case T_LGETXATTR:
case T_LLISTXATTR:
retval = do_getxattr(header.type, &in_iovec, &out_iovec);
break;
case T_LSETXATTR:
v9fs_string_init(&path);
v9fs_string_init(&name);
v9fs_string_init(&value);
retval = proxy_unmarshal(&in_iovec, PROXY_HDR_SZ, "sssdd", &path,
&name, &value, &size, &flags);
if (retval > 0) {
retval = lsetxattr(path.data,
name.data, value.data, size, flags);
if (retval < 0) {
retval = -errno;
}
}
v9fs_string_free(&path);
v9fs_string_free(&name);
v9fs_string_free(&value);
break;
case T_LREMOVEXATTR:
v9fs_string_init(&path);
v9fs_string_init(&name);
retval = proxy_unmarshal(&in_iovec,
PROXY_HDR_SZ, "ss", &path, &name);
if (retval > 0) {
retval = lremovexattr(path.data, name.data);
if (retval < 0) {
retval = -errno;
}
}
v9fs_string_free(&path);
v9fs_string_free(&name);
break;
case T_GETVERSION:
retval = do_getversion(&in_iovec, &out_iovec);
break;
default:
goto err_out;
break;
}
if (process_reply(sock, header.type, &out_iovec, retval) < 0) {
goto err_out;
}
}
err_out:
g_free(in_iovec.iov_base);
g_free(out_iovec.iov_base);
return -1;
}
static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name,
int flags, FsCred *credp, V9fsFidOpenState *fs)
{
char *path;
int fd = -1;
int err = -1;
int serrno = 0;
V9fsString fullname;
char *buffer;
/*
* Mark all the open to not follow symlinks
*/
flags |= O_NOFOLLOW;
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
path = fullname.data;
/* Determine the security model */
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
buffer = rpath(fs_ctx, path);
fd = open(buffer, flags, SM_LOCAL_MODE_BITS);
if (fd == -1) {
g_free(buffer);
err = fd;
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFREG;
/* Set cleint credentials in xattr */
err = local_set_xattr(buffer, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) {
buffer = rpath(fs_ctx, path);
fd = open(buffer, flags, SM_LOCAL_MODE_BITS);
if (fd == -1) {
g_free(buffer);
err = fd;
goto out;
}
credp->fc_mode = credp->fc_mode|S_IFREG;
/* Set client credentials in .virtfs_metadata directory files */
err = local_set_mapped_file_attr(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) ||
(fs_ctx->export_flags & V9FS_SM_NONE)) {
buffer = rpath(fs_ctx, path);
fd = open(buffer, flags, credp->fc_mode);
if (fd == -1) {
g_free(buffer);
err = fd;
goto out;
}
err = local_post_create_passthrough(fs_ctx, path, credp);
if (err == -1) {
serrno = errno;
goto err_end;
}
}
err = fd;
fs->fd = fd;
goto out;
err_end:
close(fd);
remove(buffer);
errno = serrno;
g_free(buffer);
out:
v9fs_string_free(&fullname);
return err;
}