diff options
Diffstat (limited to 'src/init/fs')
| -rw-r--r-- | src/init/fs/misc.c | 168 | ||||
| -rw-r--r-- | src/init/fs/misc.h | 16 |
2 files changed, 0 insertions, 184 deletions
diff --git a/src/init/fs/misc.c b/src/init/fs/misc.c deleted file mode 100644 index a218bf5..0000000 --- a/src/init/fs/misc.c +++ /dev/null @@ -1,168 +0,0 @@ -#include <init/fs/misc.h> -#include <init/stdlib.h> -#include <shared/flags.h> -#include <shared/mem.h> -#include <shared/syscalls.h> -#include <stdbool.h> - -bool fork2_n_mount(const char *path) { - handle_t h; - if (_syscall_fork(FORK_NEWFS, &h) > 0) { /* parent */ - _syscall_mount(h, path, strlen(path)); - _syscall_close(h); - return true; - } - return false; -} - -void fs_passthru(const char *prefix) { - struct fs_wait_response res; - const size_t buf_len = 1024; - char *buf = malloc(buf_len); - int prefix_len = prefix ? strlen(prefix) : 0; - if (!buf) _syscall_exit(1); - - while (!_syscall_fs_wait(buf, buf_len, &res)) { - switch (res.op) { - case VFSOP_OPEN: - if (prefix) { - if (prefix_len + res.len > buf_len) { - _syscall_fs_respond(NULL, -1, 0); - break; - } - - // TODO memmove - char tmp[64]; - memcpy(tmp, buf, res.len); - memcpy(buf + prefix_len, tmp, res.len); - memcpy(buf, prefix, prefix_len); - res.len += prefix_len; - } - _syscall_fs_respond(NULL, _syscall_open(buf, res.len, res.flags), FSR_DELEGATE); - break; - - default: - _syscall_fs_respond(NULL, -1, 0); - break; - } - } - _syscall_exit(0); -} - -void fs_whitelist(const char **list) { - struct fs_wait_response res; - const size_t buf_len = 1024; - char *buf = malloc(buf_len); - bool allow; - if (!buf) _syscall_exit(1); - - while (!_syscall_fs_wait(buf, buf_len, &res)) { - switch (res.op) { - case VFSOP_OPEN: - allow = false; - // TODO reverse dir_inject - for (const char **iter = list; *iter; iter++) { - size_t len = strlen(*iter); // inefficient, whatever - if (len <= res.len && !memcmp(buf, *iter, len)) { - allow = true; - break; - } - } - _syscall_fs_respond(NULL, allow ? _syscall_open(buf, res.len, res.flags) : -1, FSR_DELEGATE); - break; - - default: - _syscall_fs_respond(NULL, -1, 0); - break; - } - } - _syscall_exit(0); -} - - -void fs_dir_inject(const char *path) { - struct fs_dir_handle { - const char *inject; - int delegate, inject_len; - }; - - const size_t path_len = strlen(path); - struct fs_wait_response res; - struct fs_dir_handle *data; - const size_t buf_len = 1024; - char *buf = malloc(buf_len); - int ret, inject_len; - - if (!buf) _syscall_exit(1); - - while (!_syscall_fs_wait(buf, buf_len, &res)) { - data = res.id; - switch (res.op) { - case VFSOP_OPEN: - if (buf[res.len - 1] == '/' && - res.len < path_len && !memcmp(path, buf, res.len)) - { - /* opening a directory that we're injecting into */ - - if (res.flags & OPEN_CREATE) { - _syscall_fs_respond(NULL, -1, 0); - break; - } - - data = malloc(sizeof *data); - data->delegate = _syscall_open(buf, res.len, res.flags); - data->inject = path + res.len; - - /* inject up to the next slash */ - inject_len = 0; - while (data->inject[inject_len] && data->inject[inject_len] != '/') - inject_len++; - if (data->inject[inject_len] == '/') - inject_len++; - data->inject_len = inject_len; - - _syscall_fs_respond(data, 0, 0); - } else { - _syscall_fs_respond(NULL, _syscall_open(buf, res.len, res.flags), FSR_DELEGATE); - } - break; - - case VFSOP_CLOSE: - if (data->delegate >= 0) - _syscall_close(data->delegate); - _syscall_fs_respond(NULL, 0, 0); - break; - - case VFSOP_READ: - if (res.offset > 0) _syscall_fs_respond(NULL, 0, 0); // TODO working offsets - - int out_len = data->inject_len; - memcpy(buf, data->inject, out_len); - buf[out_len++] = '\0'; - - if (data->delegate >= 0) { - int to_read = res.capacity < buf_len ? res.capacity : buf_len; - to_read -= out_len; - ret = _syscall_read(data->delegate, buf + out_len, to_read, 0); - if (ret > 0) out_len += ret; - // TODO deduplicate entries - } - - _syscall_fs_respond(buf, out_len, 0); - break; - - case VFSOP_WRITE: - if (data->delegate >= 0) - ret = _syscall_write(data->delegate, buf, res.len, res.offset); - else - ret = -1; - _syscall_fs_respond(NULL, ret, 0); - break; - - default: - _syscall_fs_respond(NULL, -1, 0); - break; - } - } - _syscall_exit(0); -} diff --git a/src/init/fs/misc.h b/src/init/fs/misc.h deleted file mode 100644 index d64ab1e..0000000 --- a/src/init/fs/misc.h +++ /dev/null @@ -1,16 +0,0 @@ -#pragma once -#include <init/stdlib.h> -#include <stdbool.h> - -bool fork2_n_mount(const char *path); - -void fs_passthru(const char *prefix); -void fs_whitelist(const char **list); - -void fs_dir_inject(const char *path); - -/** Mounts something and injects its path into the fs */ -// TODO path needs to have a trailing slash -#define MOUNT(path, impl) \ - if (!fork2_n_mount(path)) {_klogf("impl %s", path); impl;} \ - if (!fork2_n_mount("/")) {_klogf("dir for %s", path); fs_dir_inject(path);} |