da6053d0a7
Previously we were a bit sloppy with the index and size types of arrays, we'd regularly use unsigned. While I don't think this ever resulted in real issues I think we should be more careful there and follow a stricter regime: unless there's a strong reason not to use size_t for array sizes and indexes, size_t it should be. Any allocations we do ultimately will use size_t anyway, and converting forth and back between unsigned and size_t will always be a source of problems. Note that on 32bit machines "unsigned" and "size_t" are equivalent, and on 64bit machines our arrays shouldn't grow that large anyway, and if they do we have a problem, however that kind of overly large allocation we have protections for usually, but for overflows we do not have that so much, hence let's add it. So yeah, it's a story of the current code being already "good enough", but I think some extra type hygiene is better. This patch tries to be comprehensive, but it probably isn't and I missed a few cases. But I guess we can cover that later as we notice it. Among smaller fixes, this changes: 1. strv_length()' return type becomes size_t 2. the unit file changes array size becomes size_t 3. DNS answer and query array sizes become size_t Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=76745
117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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Copyright 2016 Djalal Harouni
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***/
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typedef struct NamespaceInfo NamespaceInfo;
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typedef struct BindMount BindMount;
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typedef struct TemporaryFileSystem TemporaryFileSystem;
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#include <stdbool.h>
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#include "dissect-image.h"
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#include "macro.h"
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typedef enum ProtectHome {
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PROTECT_HOME_NO,
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PROTECT_HOME_YES,
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PROTECT_HOME_READ_ONLY,
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PROTECT_HOME_TMPFS,
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_PROTECT_HOME_MAX,
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_PROTECT_HOME_INVALID = -1
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} ProtectHome;
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typedef enum NamespaceType {
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NAMESPACE_MOUNT,
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NAMESPACE_CGROUP,
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NAMESPACE_UTS,
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NAMESPACE_IPC,
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NAMESPACE_USER,
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NAMESPACE_PID,
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NAMESPACE_NET,
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_NAMESPACE_TYPE_MAX,
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_NAMESPACE_TYPE_INVALID = -1,
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} NamespaceType;
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typedef enum ProtectSystem {
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PROTECT_SYSTEM_NO,
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PROTECT_SYSTEM_YES,
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PROTECT_SYSTEM_FULL,
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PROTECT_SYSTEM_STRICT,
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_PROTECT_SYSTEM_MAX,
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_PROTECT_SYSTEM_INVALID = -1
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} ProtectSystem;
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struct NamespaceInfo {
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bool ignore_protect_paths:1;
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bool private_dev:1;
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bool protect_control_groups:1;
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bool protect_kernel_tunables:1;
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bool protect_kernel_modules:1;
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bool mount_apivfs:1;
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};
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struct BindMount {
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char *source;
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char *destination;
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bool read_only:1;
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bool recursive:1;
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bool ignore_enoent:1;
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};
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struct TemporaryFileSystem {
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char *path;
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char *options;
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};
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int setup_namespace(
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const char *root_directory,
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const char *root_image,
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const NamespaceInfo *ns_info,
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char **read_write_paths,
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char **read_only_paths,
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char **inaccessible_paths,
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char **empty_directories,
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const BindMount *bind_mounts,
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size_t n_bind_mounts,
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const TemporaryFileSystem *temporary_filesystems,
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size_t n_temporary_filesystems,
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const char *tmp_dir,
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const char *var_tmp_dir,
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ProtectHome protect_home,
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ProtectSystem protect_system,
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unsigned long mount_flags,
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DissectImageFlags dissected_image_flags);
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int setup_tmp_dirs(
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const char *id,
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char **tmp_dir,
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char **var_tmp_dir);
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int setup_netns(int netns_storage_socket[2]);
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const char* protect_home_to_string(ProtectHome p) _const_;
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ProtectHome protect_home_from_string(const char *s) _pure_;
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ProtectHome parse_protect_home_or_bool(const char *s);
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const char* protect_system_to_string(ProtectSystem p) _const_;
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ProtectSystem protect_system_from_string(const char *s) _pure_;
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ProtectSystem parse_protect_system_or_bool(const char *s);
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void bind_mount_free_many(BindMount *b, size_t n);
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int bind_mount_add(BindMount **b, size_t *n, const BindMount *item);
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void temporary_filesystem_free_many(TemporaryFileSystem *t, size_t n);
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int temporary_filesystem_add(TemporaryFileSystem **t, size_t *n,
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const char *path, const char *options);
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const char* namespace_type_to_string(NamespaceType t) _const_;
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NamespaceType namespace_type_from_string(const char *s) _pure_;
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bool ns_type_supported(NamespaceType type);
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