root / hw / 9pfs / virtio-9p-local.c @ 1a9978a5
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/*
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* Virtio 9p Posix callback
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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 "hw/virtio/virtio.h" |
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#include "virtio-9p.h" |
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#include "virtio-9p-xattr.h" |
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#include <arpa/inet.h> |
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#include <pwd.h> |
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#include <grp.h> |
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#include <sys/socket.h> |
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#include <sys/un.h> |
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#include "qemu/xattr.h" |
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#include <libgen.h> |
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#include <linux/fs.h> |
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#ifdef CONFIG_LINUX_MAGIC_H
|
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#include <linux/magic.h> |
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#endif
|
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#include <sys/ioctl.h> |
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|
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#ifndef XFS_SUPER_MAGIC
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#define XFS_SUPER_MAGIC 0x58465342 |
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#endif
|
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#ifndef EXT2_SUPER_MAGIC
|
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#define EXT2_SUPER_MAGIC 0xEF53 |
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#endif
|
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#ifndef REISERFS_SUPER_MAGIC
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#define REISERFS_SUPER_MAGIC 0x52654973 |
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#endif
|
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#ifndef BTRFS_SUPER_MAGIC
|
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#define BTRFS_SUPER_MAGIC 0x9123683E |
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#endif
|
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|
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#define VIRTFS_META_DIR ".virtfs_metadata" |
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|
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static const char *local_mapped_attr_path(FsContext *ctx, |
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const char *path, char *buffer) |
| 47 |
{
|
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char *dir_name;
|
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char *tmp_path = g_strdup(path);
|
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char *base_name = basename(tmp_path);
|
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|
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/* NULL terminate the directory */
|
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dir_name = tmp_path; |
| 54 |
*(base_name - 1) = '\0'; |
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|
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snprintf(buffer, PATH_MAX, "%s/%s/%s/%s",
|
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ctx->fs_root, dir_name, VIRTFS_META_DIR, base_name); |
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g_free(tmp_path); |
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return buffer;
|
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} |
| 61 |
|
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static FILE *local_fopen(const char *path, const char *mode) |
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{
|
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int fd, o_mode = 0; |
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FILE *fp; |
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int flags = O_NOFOLLOW;
|
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/*
|
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* only supports two modes
|
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*/
|
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if (mode[0] == 'r') { |
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flags |= O_RDONLY; |
| 72 |
} else if (mode[0] == 'w') { |
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flags |= O_WRONLY | O_TRUNC | O_CREAT; |
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o_mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; |
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} else {
|
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return NULL; |
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} |
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fd = open(path, flags, o_mode); |
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if (fd == -1) { |
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return NULL; |
| 81 |
} |
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fp = fdopen(fd, mode); |
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if (!fp) {
|
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close(fd); |
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} |
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return fp;
|
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} |
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|
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#define ATTR_MAX 100 |
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static void local_mapped_file_attr(FsContext *ctx, const char *path, |
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struct stat *stbuf)
|
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{
|
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FILE *fp; |
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char buf[ATTR_MAX];
|
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char attr_path[PATH_MAX];
|
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|
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local_mapped_attr_path(ctx, path, attr_path); |
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fp = local_fopen(attr_path, "r");
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if (!fp) {
|
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return;
|
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} |
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memset(buf, 0, ATTR_MAX);
|
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while (fgets(buf, ATTR_MAX, fp)) {
|
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if (!strncmp(buf, "virtfs.uid", 10)) { |
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stbuf->st_uid = atoi(buf+11);
|
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} else if (!strncmp(buf, "virtfs.gid", 10)) { |
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stbuf->st_gid = atoi(buf+11);
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} else if (!strncmp(buf, "virtfs.mode", 11)) { |
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stbuf->st_mode = atoi(buf+12);
|
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} else if (!strncmp(buf, "virtfs.rdev", 11)) { |
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stbuf->st_rdev = atoi(buf+12);
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} |
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memset(buf, 0, ATTR_MAX);
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} |
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fclose(fp); |
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} |
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|
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static int local_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat *stbuf) |
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{
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int err;
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char buffer[PATH_MAX];
|
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char *path = fs_path->data;
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|
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err = lstat(rpath(fs_ctx, path, buffer), stbuf); |
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if (err) {
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return err;
|
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} |
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if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
|
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/* Actual credentials are part of extended attrs */
|
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uid_t tmp_uid; |
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gid_t tmp_gid; |
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mode_t tmp_mode; |
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dev_t tmp_dev; |
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if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.uid", &tmp_uid, |
| 135 |
sizeof(uid_t)) > 0) { |
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stbuf->st_uid = tmp_uid; |
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} |
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if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.gid", &tmp_gid, |
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sizeof(gid_t)) > 0) { |
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stbuf->st_gid = tmp_gid; |
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} |
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if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.mode", |
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&tmp_mode, sizeof(mode_t)) > 0) { |
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stbuf->st_mode = tmp_mode; |
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} |
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if (getxattr(rpath(fs_ctx, path, buffer), "user.virtfs.rdev", &tmp_dev, |
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sizeof(dev_t)) > 0) { |
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stbuf->st_rdev = tmp_dev; |
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} |
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} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
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local_mapped_file_attr(fs_ctx, path, stbuf); |
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} |
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return err;
|
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} |
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|
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static int local_create_mapped_attr_dir(FsContext *ctx, const char *path) |
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{
|
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int err;
|
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char attr_dir[PATH_MAX];
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char *tmp_path = g_strdup(path);
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|
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snprintf(attr_dir, PATH_MAX, "%s/%s/%s",
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ctx->fs_root, dirname(tmp_path), VIRTFS_META_DIR); |
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|
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err = mkdir(attr_dir, 0700);
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if (err < 0 && errno == EEXIST) { |
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err = 0;
|
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} |
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g_free(tmp_path); |
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return err;
|
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} |
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|
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static int local_set_mapped_file_attr(FsContext *ctx, |
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const char *path, FsCred *credp) |
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{
|
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FILE *fp; |
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int ret = 0; |
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char buf[ATTR_MAX];
|
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char attr_path[PATH_MAX];
|
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int uid = -1, gid = -1, mode = -1, rdev = -1; |
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|
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fp = local_fopen(local_mapped_attr_path(ctx, path, attr_path), "r");
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if (!fp) {
|
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goto create_map_file;
|
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} |
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memset(buf, 0, ATTR_MAX);
|
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while (fgets(buf, ATTR_MAX, fp)) {
|
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if (!strncmp(buf, "virtfs.uid", 10)) { |
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uid = atoi(buf+11);
|
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} else if (!strncmp(buf, "virtfs.gid", 10)) { |
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gid = atoi(buf+11);
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} else if (!strncmp(buf, "virtfs.mode", 11)) { |
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mode = atoi(buf+12);
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} else if (!strncmp(buf, "virtfs.rdev", 11)) { |
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rdev = atoi(buf+12);
|
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} |
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memset(buf, 0, ATTR_MAX);
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} |
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fclose(fp); |
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goto update_map_file;
|
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|
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create_map_file:
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ret = local_create_mapped_attr_dir(ctx, path); |
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if (ret < 0) { |
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goto err_out;
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} |
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|
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update_map_file:
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fp = local_fopen(attr_path, "w");
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if (!fp) {
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ret = -1;
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goto err_out;
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} |
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|
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if (credp->fc_uid != -1) { |
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uid = credp->fc_uid; |
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} |
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if (credp->fc_gid != -1) { |
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gid = credp->fc_gid; |
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} |
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if (credp->fc_mode != -1) { |
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mode = credp->fc_mode; |
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} |
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if (credp->fc_rdev != -1) { |
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rdev = credp->fc_rdev; |
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} |
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|
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|
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if (uid != -1) { |
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fprintf(fp, "virtfs.uid=%d\n", uid);
|
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} |
| 232 |
if (gid != -1) { |
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fprintf(fp, "virtfs.gid=%d\n", gid);
|
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} |
| 235 |
if (mode != -1) { |
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fprintf(fp, "virtfs.mode=%d\n", mode);
|
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} |
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if (rdev != -1) { |
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fprintf(fp, "virtfs.rdev=%d\n", rdev);
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} |
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fclose(fp); |
| 242 |
|
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err_out:
|
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return ret;
|
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} |
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|
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static int local_set_xattr(const char *path, FsCred *credp) |
| 248 |
{
|
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int err;
|
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|
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if (credp->fc_uid != -1) { |
| 252 |
err = setxattr(path, "user.virtfs.uid", &credp->fc_uid, sizeof(uid_t), |
| 253 |
0);
|
| 254 |
if (err) {
|
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return err;
|
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} |
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} |
| 258 |
if (credp->fc_gid != -1) { |
| 259 |
err = setxattr(path, "user.virtfs.gid", &credp->fc_gid, sizeof(gid_t), |
| 260 |
0);
|
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if (err) {
|
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return err;
|
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} |
| 264 |
} |
| 265 |
if (credp->fc_mode != -1) { |
| 266 |
err = setxattr(path, "user.virtfs.mode", &credp->fc_mode,
|
| 267 |
sizeof(mode_t), 0); |
| 268 |
if (err) {
|
| 269 |
return err;
|
| 270 |
} |
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} |
| 272 |
if (credp->fc_rdev != -1) { |
| 273 |
err = setxattr(path, "user.virtfs.rdev", &credp->fc_rdev,
|
| 274 |
sizeof(dev_t), 0); |
| 275 |
if (err) {
|
| 276 |
return err;
|
| 277 |
} |
| 278 |
} |
| 279 |
return 0; |
| 280 |
} |
| 281 |
|
| 282 |
static int local_post_create_passthrough(FsContext *fs_ctx, const char *path, |
| 283 |
FsCred *credp) |
| 284 |
{
|
| 285 |
char buffer[PATH_MAX];
|
| 286 |
|
| 287 |
if (lchown(rpath(fs_ctx, path, buffer), credp->fc_uid,
|
| 288 |
credp->fc_gid) < 0) {
|
| 289 |
/*
|
| 290 |
* If we fail to change ownership and if we are
|
| 291 |
* using security model none. Ignore the error
|
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*/
|
| 293 |
if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) {
|
| 294 |
return -1; |
| 295 |
} |
| 296 |
} |
| 297 |
|
| 298 |
if (chmod(rpath(fs_ctx, path, buffer), credp->fc_mode & 07777) < 0) { |
| 299 |
return -1; |
| 300 |
} |
| 301 |
return 0; |
| 302 |
} |
| 303 |
|
| 304 |
static ssize_t local_readlink(FsContext *fs_ctx, V9fsPath *fs_path,
|
| 305 |
char *buf, size_t bufsz)
|
| 306 |
{
|
| 307 |
ssize_t tsize = -1;
|
| 308 |
char buffer[PATH_MAX];
|
| 309 |
char *path = fs_path->data;
|
| 310 |
|
| 311 |
if ((fs_ctx->export_flags & V9FS_SM_MAPPED) ||
|
| 312 |
(fs_ctx->export_flags & V9FS_SM_MAPPED_FILE)) {
|
| 313 |
int fd;
|
| 314 |
fd = open(rpath(fs_ctx, path, buffer), O_RDONLY | O_NOFOLLOW); |
| 315 |
if (fd == -1) { |
| 316 |
return -1; |
| 317 |
} |
| 318 |
do {
|
| 319 |
tsize = read(fd, (void *)buf, bufsz);
|
| 320 |
} while (tsize == -1 && errno == EINTR); |
| 321 |
close(fd); |
| 322 |
return tsize;
|
| 323 |
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 324 |
(fs_ctx->export_flags & V9FS_SM_NONE)) {
|
| 325 |
tsize = readlink(rpath(fs_ctx, path, buffer), buf, bufsz); |
| 326 |
} |
| 327 |
return tsize;
|
| 328 |
} |
| 329 |
|
| 330 |
static int local_close(FsContext *ctx, V9fsFidOpenState *fs) |
| 331 |
{
|
| 332 |
return close(fs->fd);
|
| 333 |
} |
| 334 |
|
| 335 |
static int local_closedir(FsContext *ctx, V9fsFidOpenState *fs) |
| 336 |
{
|
| 337 |
return closedir(fs->dir);
|
| 338 |
} |
| 339 |
|
| 340 |
static int local_open(FsContext *ctx, V9fsPath *fs_path, |
| 341 |
int flags, V9fsFidOpenState *fs)
|
| 342 |
{
|
| 343 |
char buffer[PATH_MAX];
|
| 344 |
char *path = fs_path->data;
|
| 345 |
|
| 346 |
fs->fd = open(rpath(ctx, path, buffer), flags | O_NOFOLLOW); |
| 347 |
return fs->fd;
|
| 348 |
} |
| 349 |
|
| 350 |
static int local_opendir(FsContext *ctx, |
| 351 |
V9fsPath *fs_path, V9fsFidOpenState *fs) |
| 352 |
{
|
| 353 |
char buffer[PATH_MAX];
|
| 354 |
char *path = fs_path->data;
|
| 355 |
|
| 356 |
fs->dir = opendir(rpath(ctx, path, buffer)); |
| 357 |
if (!fs->dir) {
|
| 358 |
return -1; |
| 359 |
} |
| 360 |
return 0; |
| 361 |
} |
| 362 |
|
| 363 |
static void local_rewinddir(FsContext *ctx, V9fsFidOpenState *fs) |
| 364 |
{
|
| 365 |
return rewinddir(fs->dir);
|
| 366 |
} |
| 367 |
|
| 368 |
static off_t local_telldir(FsContext *ctx, V9fsFidOpenState *fs)
|
| 369 |
{
|
| 370 |
return telldir(fs->dir);
|
| 371 |
} |
| 372 |
|
| 373 |
static int local_readdir_r(FsContext *ctx, V9fsFidOpenState *fs, |
| 374 |
struct dirent *entry,
|
| 375 |
struct dirent **result)
|
| 376 |
{
|
| 377 |
int ret;
|
| 378 |
|
| 379 |
again:
|
| 380 |
ret = readdir_r(fs->dir, entry, result); |
| 381 |
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
|
| 382 |
if (!ret && *result != NULL && |
| 383 |
!strcmp(entry->d_name, VIRTFS_META_DIR)) {
|
| 384 |
/* skp the meta data directory */
|
| 385 |
goto again;
|
| 386 |
} |
| 387 |
} |
| 388 |
return ret;
|
| 389 |
} |
| 390 |
|
| 391 |
static void local_seekdir(FsContext *ctx, V9fsFidOpenState *fs, off_t off) |
| 392 |
{
|
| 393 |
return seekdir(fs->dir, off);
|
| 394 |
} |
| 395 |
|
| 396 |
static ssize_t local_preadv(FsContext *ctx, V9fsFidOpenState *fs,
|
| 397 |
const struct iovec *iov, |
| 398 |
int iovcnt, off_t offset)
|
| 399 |
{
|
| 400 |
#ifdef CONFIG_PREADV
|
| 401 |
return preadv(fs->fd, iov, iovcnt, offset);
|
| 402 |
#else
|
| 403 |
int err = lseek(fs->fd, offset, SEEK_SET);
|
| 404 |
if (err == -1) { |
| 405 |
return err;
|
| 406 |
} else {
|
| 407 |
return readv(fs->fd, iov, iovcnt);
|
| 408 |
} |
| 409 |
#endif
|
| 410 |
} |
| 411 |
|
| 412 |
static ssize_t local_pwritev(FsContext *ctx, V9fsFidOpenState *fs,
|
| 413 |
const struct iovec *iov, |
| 414 |
int iovcnt, off_t offset)
|
| 415 |
{
|
| 416 |
ssize_t ret |
| 417 |
; |
| 418 |
#ifdef CONFIG_PREADV
|
| 419 |
ret = pwritev(fs->fd, iov, iovcnt, offset); |
| 420 |
#else
|
| 421 |
int err = lseek(fs->fd, offset, SEEK_SET);
|
| 422 |
if (err == -1) { |
| 423 |
return err;
|
| 424 |
} else {
|
| 425 |
ret = writev(fs->fd, iov, iovcnt); |
| 426 |
} |
| 427 |
#endif
|
| 428 |
#ifdef CONFIG_SYNC_FILE_RANGE
|
| 429 |
if (ret > 0 && ctx->export_flags & V9FS_IMMEDIATE_WRITEOUT) { |
| 430 |
/*
|
| 431 |
* Initiate a writeback. This is not a data integrity sync.
|
| 432 |
* We want to ensure that we don't leave dirty pages in the cache
|
| 433 |
* after write when writeout=immediate is sepcified.
|
| 434 |
*/
|
| 435 |
sync_file_range(fs->fd, offset, ret, |
| 436 |
SYNC_FILE_RANGE_WAIT_BEFORE | SYNC_FILE_RANGE_WRITE); |
| 437 |
} |
| 438 |
#endif
|
| 439 |
return ret;
|
| 440 |
} |
| 441 |
|
| 442 |
static int local_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
| 443 |
{
|
| 444 |
char buffer[PATH_MAX];
|
| 445 |
char *path = fs_path->data;
|
| 446 |
|
| 447 |
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
|
| 448 |
return local_set_xattr(rpath(fs_ctx, path, buffer), credp);
|
| 449 |
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 450 |
return local_set_mapped_file_attr(fs_ctx, path, credp);
|
| 451 |
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 452 |
(fs_ctx->export_flags & V9FS_SM_NONE)) {
|
| 453 |
return chmod(rpath(fs_ctx, path, buffer), credp->fc_mode);
|
| 454 |
} |
| 455 |
return -1; |
| 456 |
} |
| 457 |
|
| 458 |
static int local_mknod(FsContext *fs_ctx, V9fsPath *dir_path, |
| 459 |
const char *name, FsCred *credp) |
| 460 |
{
|
| 461 |
char *path;
|
| 462 |
int err = -1; |
| 463 |
int serrno = 0; |
| 464 |
V9fsString fullname; |
| 465 |
char buffer[PATH_MAX];
|
| 466 |
|
| 467 |
v9fs_string_init(&fullname); |
| 468 |
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
|
| 469 |
path = fullname.data; |
| 470 |
|
| 471 |
/* Determine the security model */
|
| 472 |
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
|
| 473 |
err = mknod(rpath(fs_ctx, path, buffer), |
| 474 |
SM_LOCAL_MODE_BITS|S_IFREG, 0);
|
| 475 |
if (err == -1) { |
| 476 |
goto out;
|
| 477 |
} |
| 478 |
err = local_set_xattr(rpath(fs_ctx, path, buffer), credp); |
| 479 |
if (err == -1) { |
| 480 |
serrno = errno; |
| 481 |
goto err_end;
|
| 482 |
} |
| 483 |
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 484 |
|
| 485 |
err = mknod(rpath(fs_ctx, path, buffer), |
| 486 |
SM_LOCAL_MODE_BITS|S_IFREG, 0);
|
| 487 |
if (err == -1) { |
| 488 |
goto out;
|
| 489 |
} |
| 490 |
err = local_set_mapped_file_attr(fs_ctx, path, credp); |
| 491 |
if (err == -1) { |
| 492 |
serrno = errno; |
| 493 |
goto err_end;
|
| 494 |
} |
| 495 |
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 496 |
(fs_ctx->export_flags & V9FS_SM_NONE)) {
|
| 497 |
err = mknod(rpath(fs_ctx, path, buffer), credp->fc_mode, |
| 498 |
credp->fc_rdev); |
| 499 |
if (err == -1) { |
| 500 |
goto out;
|
| 501 |
} |
| 502 |
err = local_post_create_passthrough(fs_ctx, path, credp); |
| 503 |
if (err == -1) { |
| 504 |
serrno = errno; |
| 505 |
goto err_end;
|
| 506 |
} |
| 507 |
} |
| 508 |
goto out;
|
| 509 |
|
| 510 |
err_end:
|
| 511 |
remove(rpath(fs_ctx, path, buffer)); |
| 512 |
errno = serrno; |
| 513 |
out:
|
| 514 |
v9fs_string_free(&fullname); |
| 515 |
return err;
|
| 516 |
} |
| 517 |
|
| 518 |
static int local_mkdir(FsContext *fs_ctx, V9fsPath *dir_path, |
| 519 |
const char *name, FsCred *credp) |
| 520 |
{
|
| 521 |
char *path;
|
| 522 |
int err = -1; |
| 523 |
int serrno = 0; |
| 524 |
V9fsString fullname; |
| 525 |
char buffer[PATH_MAX];
|
| 526 |
|
| 527 |
v9fs_string_init(&fullname); |
| 528 |
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
|
| 529 |
path = fullname.data; |
| 530 |
|
| 531 |
/* Determine the security model */
|
| 532 |
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
|
| 533 |
err = mkdir(rpath(fs_ctx, path, buffer), SM_LOCAL_DIR_MODE_BITS); |
| 534 |
if (err == -1) { |
| 535 |
goto out;
|
| 536 |
} |
| 537 |
credp->fc_mode = credp->fc_mode|S_IFDIR; |
| 538 |
err = local_set_xattr(rpath(fs_ctx, path, buffer), credp); |
| 539 |
if (err == -1) { |
| 540 |
serrno = errno; |
| 541 |
goto err_end;
|
| 542 |
} |
| 543 |
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 544 |
err = mkdir(rpath(fs_ctx, path, buffer), SM_LOCAL_DIR_MODE_BITS); |
| 545 |
if (err == -1) { |
| 546 |
goto out;
|
| 547 |
} |
| 548 |
credp->fc_mode = credp->fc_mode|S_IFDIR; |
| 549 |
err = local_set_mapped_file_attr(fs_ctx, path, credp); |
| 550 |
if (err == -1) { |
| 551 |
serrno = errno; |
| 552 |
goto err_end;
|
| 553 |
} |
| 554 |
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 555 |
(fs_ctx->export_flags & V9FS_SM_NONE)) {
|
| 556 |
err = mkdir(rpath(fs_ctx, path, buffer), credp->fc_mode); |
| 557 |
if (err == -1) { |
| 558 |
goto out;
|
| 559 |
} |
| 560 |
err = local_post_create_passthrough(fs_ctx, path, credp); |
| 561 |
if (err == -1) { |
| 562 |
serrno = errno; |
| 563 |
goto err_end;
|
| 564 |
} |
| 565 |
} |
| 566 |
goto out;
|
| 567 |
|
| 568 |
err_end:
|
| 569 |
remove(rpath(fs_ctx, path, buffer)); |
| 570 |
errno = serrno; |
| 571 |
out:
|
| 572 |
v9fs_string_free(&fullname); |
| 573 |
return err;
|
| 574 |
} |
| 575 |
|
| 576 |
static int local_fstat(FsContext *fs_ctx, int fid_type, |
| 577 |
V9fsFidOpenState *fs, struct stat *stbuf)
|
| 578 |
{
|
| 579 |
int err, fd;
|
| 580 |
|
| 581 |
if (fid_type == P9_FID_DIR) {
|
| 582 |
fd = dirfd(fs->dir); |
| 583 |
} else {
|
| 584 |
fd = fs->fd; |
| 585 |
} |
| 586 |
|
| 587 |
err = fstat(fd, stbuf); |
| 588 |
if (err) {
|
| 589 |
return err;
|
| 590 |
} |
| 591 |
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
|
| 592 |
/* Actual credentials are part of extended attrs */
|
| 593 |
uid_t tmp_uid; |
| 594 |
gid_t tmp_gid; |
| 595 |
mode_t tmp_mode; |
| 596 |
dev_t tmp_dev; |
| 597 |
|
| 598 |
if (fgetxattr(fd, "user.virtfs.uid", |
| 599 |
&tmp_uid, sizeof(uid_t)) > 0) { |
| 600 |
stbuf->st_uid = tmp_uid; |
| 601 |
} |
| 602 |
if (fgetxattr(fd, "user.virtfs.gid", |
| 603 |
&tmp_gid, sizeof(gid_t)) > 0) { |
| 604 |
stbuf->st_gid = tmp_gid; |
| 605 |
} |
| 606 |
if (fgetxattr(fd, "user.virtfs.mode", |
| 607 |
&tmp_mode, sizeof(mode_t)) > 0) { |
| 608 |
stbuf->st_mode = tmp_mode; |
| 609 |
} |
| 610 |
if (fgetxattr(fd, "user.virtfs.rdev", |
| 611 |
&tmp_dev, sizeof(dev_t)) > 0) { |
| 612 |
stbuf->st_rdev = tmp_dev; |
| 613 |
} |
| 614 |
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 615 |
errno = EOPNOTSUPP; |
| 616 |
return -1; |
| 617 |
} |
| 618 |
return err;
|
| 619 |
} |
| 620 |
|
| 621 |
static int local_open2(FsContext *fs_ctx, V9fsPath *dir_path, const char *name, |
| 622 |
int flags, FsCred *credp, V9fsFidOpenState *fs)
|
| 623 |
{
|
| 624 |
char *path;
|
| 625 |
int fd = -1; |
| 626 |
int err = -1; |
| 627 |
int serrno = 0; |
| 628 |
V9fsString fullname; |
| 629 |
char buffer[PATH_MAX];
|
| 630 |
|
| 631 |
/*
|
| 632 |
* Mark all the open to not follow symlinks
|
| 633 |
*/
|
| 634 |
flags |= O_NOFOLLOW; |
| 635 |
|
| 636 |
v9fs_string_init(&fullname); |
| 637 |
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
|
| 638 |
path = fullname.data; |
| 639 |
|
| 640 |
/* Determine the security model */
|
| 641 |
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
|
| 642 |
fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS); |
| 643 |
if (fd == -1) { |
| 644 |
err = fd; |
| 645 |
goto out;
|
| 646 |
} |
| 647 |
credp->fc_mode = credp->fc_mode|S_IFREG; |
| 648 |
/* Set cleint credentials in xattr */
|
| 649 |
err = local_set_xattr(rpath(fs_ctx, path, buffer), credp); |
| 650 |
if (err == -1) { |
| 651 |
serrno = errno; |
| 652 |
goto err_end;
|
| 653 |
} |
| 654 |
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 655 |
fd = open(rpath(fs_ctx, path, buffer), flags, SM_LOCAL_MODE_BITS); |
| 656 |
if (fd == -1) { |
| 657 |
err = fd; |
| 658 |
goto out;
|
| 659 |
} |
| 660 |
credp->fc_mode = credp->fc_mode|S_IFREG; |
| 661 |
/* Set client credentials in .virtfs_metadata directory files */
|
| 662 |
err = local_set_mapped_file_attr(fs_ctx, path, credp); |
| 663 |
if (err == -1) { |
| 664 |
serrno = errno; |
| 665 |
goto err_end;
|
| 666 |
} |
| 667 |
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 668 |
(fs_ctx->export_flags & V9FS_SM_NONE)) {
|
| 669 |
fd = open(rpath(fs_ctx, path, buffer), flags, credp->fc_mode); |
| 670 |
if (fd == -1) { |
| 671 |
err = fd; |
| 672 |
goto out;
|
| 673 |
} |
| 674 |
err = local_post_create_passthrough(fs_ctx, path, credp); |
| 675 |
if (err == -1) { |
| 676 |
serrno = errno; |
| 677 |
goto err_end;
|
| 678 |
} |
| 679 |
} |
| 680 |
err = fd; |
| 681 |
fs->fd = fd; |
| 682 |
goto out;
|
| 683 |
|
| 684 |
err_end:
|
| 685 |
close(fd); |
| 686 |
remove(rpath(fs_ctx, path, buffer)); |
| 687 |
errno = serrno; |
| 688 |
out:
|
| 689 |
v9fs_string_free(&fullname); |
| 690 |
return err;
|
| 691 |
} |
| 692 |
|
| 693 |
|
| 694 |
static int local_symlink(FsContext *fs_ctx, const char *oldpath, |
| 695 |
V9fsPath *dir_path, const char *name, FsCred *credp) |
| 696 |
{
|
| 697 |
int err = -1; |
| 698 |
int serrno = 0; |
| 699 |
char *newpath;
|
| 700 |
V9fsString fullname; |
| 701 |
char buffer[PATH_MAX];
|
| 702 |
|
| 703 |
v9fs_string_init(&fullname); |
| 704 |
v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
|
| 705 |
newpath = fullname.data; |
| 706 |
|
| 707 |
/* Determine the security model */
|
| 708 |
if (fs_ctx->export_flags & V9FS_SM_MAPPED) {
|
| 709 |
int fd;
|
| 710 |
ssize_t oldpath_size, write_size; |
| 711 |
fd = open(rpath(fs_ctx, newpath, buffer), |
| 712 |
O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW, |
| 713 |
SM_LOCAL_MODE_BITS); |
| 714 |
if (fd == -1) { |
| 715 |
err = fd; |
| 716 |
goto out;
|
| 717 |
} |
| 718 |
/* Write the oldpath (target) to the file. */
|
| 719 |
oldpath_size = strlen(oldpath); |
| 720 |
do {
|
| 721 |
write_size = write(fd, (void *)oldpath, oldpath_size);
|
| 722 |
} while (write_size == -1 && errno == EINTR); |
| 723 |
|
| 724 |
if (write_size != oldpath_size) {
|
| 725 |
serrno = errno; |
| 726 |
close(fd); |
| 727 |
err = -1;
|
| 728 |
goto err_end;
|
| 729 |
} |
| 730 |
close(fd); |
| 731 |
/* Set cleint credentials in symlink's xattr */
|
| 732 |
credp->fc_mode = credp->fc_mode|S_IFLNK; |
| 733 |
err = local_set_xattr(rpath(fs_ctx, newpath, buffer), credp); |
| 734 |
if (err == -1) { |
| 735 |
serrno = errno; |
| 736 |
goto err_end;
|
| 737 |
} |
| 738 |
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 739 |
int fd;
|
| 740 |
ssize_t oldpath_size, write_size; |
| 741 |
fd = open(rpath(fs_ctx, newpath, buffer), |
| 742 |
O_CREAT|O_EXCL|O_RDWR|O_NOFOLLOW, |
| 743 |
SM_LOCAL_MODE_BITS); |
| 744 |
if (fd == -1) { |
| 745 |
err = fd; |
| 746 |
goto out;
|
| 747 |
} |
| 748 |
/* Write the oldpath (target) to the file. */
|
| 749 |
oldpath_size = strlen(oldpath); |
| 750 |
do {
|
| 751 |
write_size = write(fd, (void *)oldpath, oldpath_size);
|
| 752 |
} while (write_size == -1 && errno == EINTR); |
| 753 |
|
| 754 |
if (write_size != oldpath_size) {
|
| 755 |
serrno = errno; |
| 756 |
close(fd); |
| 757 |
err = -1;
|
| 758 |
goto err_end;
|
| 759 |
} |
| 760 |
close(fd); |
| 761 |
/* Set cleint credentials in symlink's xattr */
|
| 762 |
credp->fc_mode = credp->fc_mode|S_IFLNK; |
| 763 |
err = local_set_mapped_file_attr(fs_ctx, newpath, credp); |
| 764 |
if (err == -1) { |
| 765 |
serrno = errno; |
| 766 |
goto err_end;
|
| 767 |
} |
| 768 |
} else if ((fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 769 |
(fs_ctx->export_flags & V9FS_SM_NONE)) {
|
| 770 |
err = symlink(oldpath, rpath(fs_ctx, newpath, buffer)); |
| 771 |
if (err) {
|
| 772 |
goto out;
|
| 773 |
} |
| 774 |
err = lchown(rpath(fs_ctx, newpath, buffer), credp->fc_uid, |
| 775 |
credp->fc_gid); |
| 776 |
if (err == -1) { |
| 777 |
/*
|
| 778 |
* If we fail to change ownership and if we are
|
| 779 |
* using security model none. Ignore the error
|
| 780 |
*/
|
| 781 |
if ((fs_ctx->export_flags & V9FS_SEC_MASK) != V9FS_SM_NONE) {
|
| 782 |
serrno = errno; |
| 783 |
goto err_end;
|
| 784 |
} else
|
| 785 |
err = 0;
|
| 786 |
} |
| 787 |
} |
| 788 |
goto out;
|
| 789 |
|
| 790 |
err_end:
|
| 791 |
remove(rpath(fs_ctx, newpath, buffer)); |
| 792 |
errno = serrno; |
| 793 |
out:
|
| 794 |
v9fs_string_free(&fullname); |
| 795 |
return err;
|
| 796 |
} |
| 797 |
|
| 798 |
static int local_link(FsContext *ctx, V9fsPath *oldpath, |
| 799 |
V9fsPath *dirpath, const char *name) |
| 800 |
{
|
| 801 |
int ret;
|
| 802 |
V9fsString newpath; |
| 803 |
char buffer[PATH_MAX], buffer1[PATH_MAX];
|
| 804 |
|
| 805 |
v9fs_string_init(&newpath); |
| 806 |
v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name);
|
| 807 |
|
| 808 |
ret = link(rpath(ctx, oldpath->data, buffer), |
| 809 |
rpath(ctx, newpath.data, buffer1)); |
| 810 |
|
| 811 |
/* now link the virtfs_metadata files */
|
| 812 |
if (!ret && (ctx->export_flags & V9FS_SM_MAPPED_FILE)) {
|
| 813 |
/* Link the .virtfs_metadata files. Create the metada directory */
|
| 814 |
ret = local_create_mapped_attr_dir(ctx, newpath.data); |
| 815 |
if (ret < 0) { |
| 816 |
goto err_out;
|
| 817 |
} |
| 818 |
ret = link(local_mapped_attr_path(ctx, oldpath->data, buffer), |
| 819 |
local_mapped_attr_path(ctx, newpath.data, buffer1)); |
| 820 |
if (ret < 0 && errno != ENOENT) { |
| 821 |
goto err_out;
|
| 822 |
} |
| 823 |
} |
| 824 |
err_out:
|
| 825 |
v9fs_string_free(&newpath); |
| 826 |
return ret;
|
| 827 |
} |
| 828 |
|
| 829 |
static int local_truncate(FsContext *ctx, V9fsPath *fs_path, off_t size) |
| 830 |
{
|
| 831 |
char buffer[PATH_MAX];
|
| 832 |
char *path = fs_path->data;
|
| 833 |
|
| 834 |
return truncate(rpath(ctx, path, buffer), size);
|
| 835 |
} |
| 836 |
|
| 837 |
static int local_rename(FsContext *ctx, const char *oldpath, |
| 838 |
const char *newpath) |
| 839 |
{
|
| 840 |
int err;
|
| 841 |
char buffer[PATH_MAX], buffer1[PATH_MAX];
|
| 842 |
|
| 843 |
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
|
| 844 |
err = local_create_mapped_attr_dir(ctx, newpath); |
| 845 |
if (err < 0) { |
| 846 |
return err;
|
| 847 |
} |
| 848 |
/* rename the .virtfs_metadata files */
|
| 849 |
err = rename(local_mapped_attr_path(ctx, oldpath, buffer), |
| 850 |
local_mapped_attr_path(ctx, newpath, buffer1)); |
| 851 |
if (err < 0 && errno != ENOENT) { |
| 852 |
return err;
|
| 853 |
} |
| 854 |
} |
| 855 |
return rename(rpath(ctx, oldpath, buffer), rpath(ctx, newpath, buffer1));
|
| 856 |
} |
| 857 |
|
| 858 |
static int local_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp) |
| 859 |
{
|
| 860 |
char buffer[PATH_MAX];
|
| 861 |
char *path = fs_path->data;
|
| 862 |
|
| 863 |
if ((credp->fc_uid == -1 && credp->fc_gid == -1) || |
| 864 |
(fs_ctx->export_flags & V9FS_SM_PASSTHROUGH) || |
| 865 |
(fs_ctx->export_flags & V9FS_SM_NONE)) {
|
| 866 |
return lchown(rpath(fs_ctx, path, buffer),
|
| 867 |
credp->fc_uid, credp->fc_gid); |
| 868 |
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED) { |
| 869 |
return local_set_xattr(rpath(fs_ctx, path, buffer), credp);
|
| 870 |
} else if (fs_ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 871 |
return local_set_mapped_file_attr(fs_ctx, path, credp);
|
| 872 |
} |
| 873 |
return -1; |
| 874 |
} |
| 875 |
|
| 876 |
static int local_utimensat(FsContext *s, V9fsPath *fs_path, |
| 877 |
const struct timespec *buf) |
| 878 |
{
|
| 879 |
char buffer[PATH_MAX];
|
| 880 |
char *path = fs_path->data;
|
| 881 |
|
| 882 |
return qemu_utimens(rpath(s, path, buffer), buf);
|
| 883 |
} |
| 884 |
|
| 885 |
static int local_remove(FsContext *ctx, const char *path) |
| 886 |
{
|
| 887 |
int err;
|
| 888 |
struct stat stbuf;
|
| 889 |
char buffer[PATH_MAX];
|
| 890 |
|
| 891 |
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
|
| 892 |
err = lstat(rpath(ctx, path, buffer), &stbuf); |
| 893 |
if (err) {
|
| 894 |
goto err_out;
|
| 895 |
} |
| 896 |
/*
|
| 897 |
* If directory remove .virtfs_metadata contained in the
|
| 898 |
* directory
|
| 899 |
*/
|
| 900 |
if (S_ISDIR(stbuf.st_mode)) {
|
| 901 |
sprintf(buffer, "%s/%s/%s", ctx->fs_root, path, VIRTFS_META_DIR);
|
| 902 |
err = remove(buffer); |
| 903 |
if (err < 0 && errno != ENOENT) { |
| 904 |
/*
|
| 905 |
* We didn't had the .virtfs_metadata file. May be file created
|
| 906 |
* in non-mapped mode ?. Ignore ENOENT.
|
| 907 |
*/
|
| 908 |
goto err_out;
|
| 909 |
} |
| 910 |
} |
| 911 |
/*
|
| 912 |
* Now remove the name from parent directory
|
| 913 |
* .virtfs_metadata directory
|
| 914 |
*/
|
| 915 |
err = remove(local_mapped_attr_path(ctx, path, buffer)); |
| 916 |
if (err < 0 && errno != ENOENT) { |
| 917 |
/*
|
| 918 |
* We didn't had the .virtfs_metadata file. May be file created
|
| 919 |
* in non-mapped mode ?. Ignore ENOENT.
|
| 920 |
*/
|
| 921 |
goto err_out;
|
| 922 |
} |
| 923 |
} |
| 924 |
return remove(rpath(ctx, path, buffer));
|
| 925 |
err_out:
|
| 926 |
return err;
|
| 927 |
} |
| 928 |
|
| 929 |
static int local_fsync(FsContext *ctx, int fid_type, |
| 930 |
V9fsFidOpenState *fs, int datasync)
|
| 931 |
{
|
| 932 |
int fd;
|
| 933 |
|
| 934 |
if (fid_type == P9_FID_DIR) {
|
| 935 |
fd = dirfd(fs->dir); |
| 936 |
} else {
|
| 937 |
fd = fs->fd; |
| 938 |
} |
| 939 |
|
| 940 |
if (datasync) {
|
| 941 |
return qemu_fdatasync(fd);
|
| 942 |
} else {
|
| 943 |
return fsync(fd);
|
| 944 |
} |
| 945 |
} |
| 946 |
|
| 947 |
static int local_statfs(FsContext *s, V9fsPath *fs_path, struct statfs *stbuf) |
| 948 |
{
|
| 949 |
char buffer[PATH_MAX];
|
| 950 |
char *path = fs_path->data;
|
| 951 |
|
| 952 |
return statfs(rpath(s, path, buffer), stbuf);
|
| 953 |
} |
| 954 |
|
| 955 |
static ssize_t local_lgetxattr(FsContext *ctx, V9fsPath *fs_path,
|
| 956 |
const char *name, void *value, size_t size) |
| 957 |
{
|
| 958 |
char *path = fs_path->data;
|
| 959 |
|
| 960 |
return v9fs_get_xattr(ctx, path, name, value, size);
|
| 961 |
} |
| 962 |
|
| 963 |
static ssize_t local_llistxattr(FsContext *ctx, V9fsPath *fs_path,
|
| 964 |
void *value, size_t size)
|
| 965 |
{
|
| 966 |
char *path = fs_path->data;
|
| 967 |
|
| 968 |
return v9fs_list_xattr(ctx, path, value, size);
|
| 969 |
} |
| 970 |
|
| 971 |
static int local_lsetxattr(FsContext *ctx, V9fsPath *fs_path, const char *name, |
| 972 |
void *value, size_t size, int flags) |
| 973 |
{
|
| 974 |
char *path = fs_path->data;
|
| 975 |
|
| 976 |
return v9fs_set_xattr(ctx, path, name, value, size, flags);
|
| 977 |
} |
| 978 |
|
| 979 |
static int local_lremovexattr(FsContext *ctx, V9fsPath *fs_path, |
| 980 |
const char *name) |
| 981 |
{
|
| 982 |
char *path = fs_path->data;
|
| 983 |
|
| 984 |
return v9fs_remove_xattr(ctx, path, name);
|
| 985 |
} |
| 986 |
|
| 987 |
static int local_name_to_path(FsContext *ctx, V9fsPath *dir_path, |
| 988 |
const char *name, V9fsPath *target) |
| 989 |
{
|
| 990 |
if (dir_path) {
|
| 991 |
v9fs_string_sprintf((V9fsString *)target, "%s/%s",
|
| 992 |
dir_path->data, name); |
| 993 |
} else {
|
| 994 |
v9fs_string_sprintf((V9fsString *)target, "%s", name);
|
| 995 |
} |
| 996 |
/* Bump the size for including terminating NULL */
|
| 997 |
target->size++; |
| 998 |
return 0; |
| 999 |
} |
| 1000 |
|
| 1001 |
static int local_renameat(FsContext *ctx, V9fsPath *olddir, |
| 1002 |
const char *old_name, V9fsPath *newdir, |
| 1003 |
const char *new_name) |
| 1004 |
{
|
| 1005 |
int ret;
|
| 1006 |
V9fsString old_full_name, new_full_name; |
| 1007 |
|
| 1008 |
v9fs_string_init(&old_full_name); |
| 1009 |
v9fs_string_init(&new_full_name); |
| 1010 |
|
| 1011 |
v9fs_string_sprintf(&old_full_name, "%s/%s", olddir->data, old_name);
|
| 1012 |
v9fs_string_sprintf(&new_full_name, "%s/%s", newdir->data, new_name);
|
| 1013 |
|
| 1014 |
ret = local_rename(ctx, old_full_name.data, new_full_name.data); |
| 1015 |
v9fs_string_free(&old_full_name); |
| 1016 |
v9fs_string_free(&new_full_name); |
| 1017 |
return ret;
|
| 1018 |
} |
| 1019 |
|
| 1020 |
static int local_unlinkat(FsContext *ctx, V9fsPath *dir, |
| 1021 |
const char *name, int flags) |
| 1022 |
{
|
| 1023 |
int ret;
|
| 1024 |
V9fsString fullname; |
| 1025 |
char buffer[PATH_MAX];
|
| 1026 |
|
| 1027 |
v9fs_string_init(&fullname); |
| 1028 |
|
| 1029 |
v9fs_string_sprintf(&fullname, "%s/%s", dir->data, name);
|
| 1030 |
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
|
| 1031 |
if (flags == AT_REMOVEDIR) {
|
| 1032 |
/*
|
| 1033 |
* If directory remove .virtfs_metadata contained in the
|
| 1034 |
* directory
|
| 1035 |
*/
|
| 1036 |
sprintf(buffer, "%s/%s/%s", ctx->fs_root,
|
| 1037 |
fullname.data, VIRTFS_META_DIR); |
| 1038 |
ret = remove(buffer); |
| 1039 |
if (ret < 0 && errno != ENOENT) { |
| 1040 |
/*
|
| 1041 |
* We didn't had the .virtfs_metadata file. May be file created
|
| 1042 |
* in non-mapped mode ?. Ignore ENOENT.
|
| 1043 |
*/
|
| 1044 |
goto err_out;
|
| 1045 |
} |
| 1046 |
} |
| 1047 |
/*
|
| 1048 |
* Now remove the name from parent directory
|
| 1049 |
* .virtfs_metadata directory.
|
| 1050 |
*/
|
| 1051 |
ret = remove(local_mapped_attr_path(ctx, fullname.data, buffer)); |
| 1052 |
if (ret < 0 && errno != ENOENT) { |
| 1053 |
/*
|
| 1054 |
* We didn't had the .virtfs_metadata file. May be file created
|
| 1055 |
* in non-mapped mode ?. Ignore ENOENT.
|
| 1056 |
*/
|
| 1057 |
goto err_out;
|
| 1058 |
} |
| 1059 |
} |
| 1060 |
/* Remove the name finally */
|
| 1061 |
ret = remove(rpath(ctx, fullname.data, buffer)); |
| 1062 |
v9fs_string_free(&fullname); |
| 1063 |
|
| 1064 |
err_out:
|
| 1065 |
return ret;
|
| 1066 |
} |
| 1067 |
|
| 1068 |
static int local_ioc_getversion(FsContext *ctx, V9fsPath *path, |
| 1069 |
mode_t st_mode, uint64_t *st_gen) |
| 1070 |
{
|
| 1071 |
#ifdef FS_IOC_GETVERSION
|
| 1072 |
int err;
|
| 1073 |
V9fsFidOpenState fid_open; |
| 1074 |
|
| 1075 |
/*
|
| 1076 |
* Do not try to open special files like device nodes, fifos etc
|
| 1077 |
* We can get fd for regular files and directories only
|
| 1078 |
*/
|
| 1079 |
if (!S_ISREG(st_mode) && !S_ISDIR(st_mode)) {
|
| 1080 |
errno = ENOTTY; |
| 1081 |
return -1; |
| 1082 |
} |
| 1083 |
err = local_open(ctx, path, O_RDONLY, &fid_open); |
| 1084 |
if (err < 0) { |
| 1085 |
return err;
|
| 1086 |
} |
| 1087 |
err = ioctl(fid_open.fd, FS_IOC_GETVERSION, st_gen); |
| 1088 |
local_close(ctx, &fid_open); |
| 1089 |
return err;
|
| 1090 |
#else
|
| 1091 |
errno = ENOTTY; |
| 1092 |
return -1; |
| 1093 |
#endif
|
| 1094 |
} |
| 1095 |
|
| 1096 |
static int local_init(FsContext *ctx) |
| 1097 |
{
|
| 1098 |
int err = 0; |
| 1099 |
struct statfs stbuf;
|
| 1100 |
|
| 1101 |
if (ctx->export_flags & V9FS_SM_PASSTHROUGH) {
|
| 1102 |
ctx->xops = passthrough_xattr_ops; |
| 1103 |
} else if (ctx->export_flags & V9FS_SM_MAPPED) { |
| 1104 |
ctx->xops = mapped_xattr_ops; |
| 1105 |
} else if (ctx->export_flags & V9FS_SM_NONE) { |
| 1106 |
ctx->xops = none_xattr_ops; |
| 1107 |
} else if (ctx->export_flags & V9FS_SM_MAPPED_FILE) { |
| 1108 |
/*
|
| 1109 |
* xattr operation for mapped-file and passthrough
|
| 1110 |
* remain same.
|
| 1111 |
*/
|
| 1112 |
ctx->xops = passthrough_xattr_ops; |
| 1113 |
} |
| 1114 |
ctx->export_flags |= V9FS_PATHNAME_FSCONTEXT; |
| 1115 |
#ifdef FS_IOC_GETVERSION
|
| 1116 |
/*
|
| 1117 |
* use ioc_getversion only if the iocl is definied
|
| 1118 |
*/
|
| 1119 |
err = statfs(ctx->fs_root, &stbuf); |
| 1120 |
if (!err) {
|
| 1121 |
switch (stbuf.f_type) {
|
| 1122 |
case EXT2_SUPER_MAGIC:
|
| 1123 |
case BTRFS_SUPER_MAGIC:
|
| 1124 |
case REISERFS_SUPER_MAGIC:
|
| 1125 |
case XFS_SUPER_MAGIC:
|
| 1126 |
ctx->exops.get_st_gen = local_ioc_getversion; |
| 1127 |
break;
|
| 1128 |
} |
| 1129 |
} |
| 1130 |
#endif
|
| 1131 |
return err;
|
| 1132 |
} |
| 1133 |
|
| 1134 |
static int local_parse_opts(QemuOpts *opts, struct FsDriverEntry *fse) |
| 1135 |
{
|
| 1136 |
const char *sec_model = qemu_opt_get(opts, "security_model"); |
| 1137 |
const char *path = qemu_opt_get(opts, "path"); |
| 1138 |
|
| 1139 |
if (!sec_model) {
|
| 1140 |
fprintf(stderr, "security model not specified, "
|
| 1141 |
"local fs needs security model\nvalid options are:"
|
| 1142 |
"\tsecurity_model=[passthrough|mapped|none]\n");
|
| 1143 |
return -1; |
| 1144 |
} |
| 1145 |
|
| 1146 |
if (!strcmp(sec_model, "passthrough")) { |
| 1147 |
fse->export_flags |= V9FS_SM_PASSTHROUGH; |
| 1148 |
} else if (!strcmp(sec_model, "mapped") || |
| 1149 |
!strcmp(sec_model, "mapped-xattr")) {
|
| 1150 |
fse->export_flags |= V9FS_SM_MAPPED; |
| 1151 |
} else if (!strcmp(sec_model, "none")) { |
| 1152 |
fse->export_flags |= V9FS_SM_NONE; |
| 1153 |
} else if (!strcmp(sec_model, "mapped-file")) { |
| 1154 |
fse->export_flags |= V9FS_SM_MAPPED_FILE; |
| 1155 |
} else {
|
| 1156 |
fprintf(stderr, "Invalid security model %s specified, valid options are"
|
| 1157 |
"\n\t [passthrough|mapped-xattr|mapped-file|none]\n",
|
| 1158 |
sec_model); |
| 1159 |
return -1; |
| 1160 |
} |
| 1161 |
|
| 1162 |
if (!path) {
|
| 1163 |
fprintf(stderr, "fsdev: No path specified.\n");
|
| 1164 |
return -1; |
| 1165 |
} |
| 1166 |
fse->path = g_strdup(path); |
| 1167 |
|
| 1168 |
return 0; |
| 1169 |
} |
| 1170 |
|
| 1171 |
FileOperations local_ops = {
|
| 1172 |
.parse_opts = local_parse_opts, |
| 1173 |
.init = local_init, |
| 1174 |
.lstat = local_lstat, |
| 1175 |
.readlink = local_readlink, |
| 1176 |
.close = local_close, |
| 1177 |
.closedir = local_closedir, |
| 1178 |
.open = local_open, |
| 1179 |
.opendir = local_opendir, |
| 1180 |
.rewinddir = local_rewinddir, |
| 1181 |
.telldir = local_telldir, |
| 1182 |
.readdir_r = local_readdir_r, |
| 1183 |
.seekdir = local_seekdir, |
| 1184 |
.preadv = local_preadv, |
| 1185 |
.pwritev = local_pwritev, |
| 1186 |
.chmod = local_chmod, |
| 1187 |
.mknod = local_mknod, |
| 1188 |
.mkdir = local_mkdir, |
| 1189 |
.fstat = local_fstat, |
| 1190 |
.open2 = local_open2, |
| 1191 |
.symlink = local_symlink, |
| 1192 |
.link = local_link, |
| 1193 |
.truncate = local_truncate, |
| 1194 |
.rename = local_rename, |
| 1195 |
.chown = local_chown, |
| 1196 |
.utimensat = local_utimensat, |
| 1197 |
.remove = local_remove, |
| 1198 |
.fsync = local_fsync, |
| 1199 |
.statfs = local_statfs, |
| 1200 |
.lgetxattr = local_lgetxattr, |
| 1201 |
.llistxattr = local_llistxattr, |
| 1202 |
.lsetxattr = local_lsetxattr, |
| 1203 |
.lremovexattr = local_lremovexattr, |
| 1204 |
.name_to_path = local_name_to_path, |
| 1205 |
.renameat = local_renameat, |
| 1206 |
.unlinkat = local_unlinkat, |
| 1207 |
}; |