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CHECKP: semi-stable vfs

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boreddevnl
2026-04-11 23:08:33 +02:00
parent 5933483009
commit 38ed0b5ffa
6 changed files with 704 additions and 456 deletions
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42
src/fs/vfs.c
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@@ -339,12 +339,14 @@ void vfs_close(vfs_file_t *file) {
int vfs_read(vfs_file_t *file, void *buf, int size) {
if (!file || !file->valid || !file->mount) return -1;
if (!file->mount->ops->read) return -1;
return file->mount->ops->read(file->mount->fs_private, file->fs_handle, buf, size);
}
int vfs_write(vfs_file_t *file, const void *buf, int size) {
if (!file || !file->valid || !file->mount) return -1;
if (!file->mount->ops->write) return -1;
return file->mount->ops->write(file->mount->fs_private, file->fs_handle, buf, size);
}
@@ -372,6 +374,7 @@ uint32_t vfs_file_size(vfs_file_t *file) {
int vfs_list_directory(const char *path, vfs_dirent_t *entries, int max) {
if (!path || !entries) return -1;
char normalized[VFS_MAX_PATH];
vfs_normalize_path(path, normalized);
@@ -483,10 +486,15 @@ bool vfs_mkdir(const char *path) {
const char *rel_path = NULL;
vfs_mount_t *mount = vfs_resolve_mount(normalized, &rel_path);
// If it's in /dev/, check if it's within a mounted volume deeper than the device node
if (vfs_starts_with(normalized, "/dev/")) {
if (!mount || !rel_path || rel_path[0] == '\0') {
return false; // Protect raw device nodes
}
}
if (!mount || !mount->ops->mkdir) return false;
if (!rel_path || rel_path[0] == '\0') return false;
return mount->ops->mkdir(mount->fs_private, rel_path);
}
@@ -496,17 +504,21 @@ bool vfs_rmdir(const char *path) {
char normalized[VFS_MAX_PATH];
vfs_normalize_path(path, normalized);
// Protect root and virtual directories
// Protect root and virtual /dev directory itself
if (normalized[0] == '/' && normalized[1] == '\0') return false;
if (vfs_strcmp(normalized, "/dev") == 0) return false;
if (vfs_starts_with(normalized, "/dev/")) return false;
const char *rel_path = NULL;
vfs_mount_t *mount = vfs_resolve_mount(normalized, &rel_path);
// If it's in /dev/, allow only if it's inside a mount beyond the device node
if (vfs_starts_with(normalized, "/dev/")) {
if (!mount || !rel_path || rel_path[0] == '\0') {
return false; // Protect raw device nodes
}
}
if (!mount || !mount->ops->rmdir) return false;
if (!rel_path || rel_path[0] == '\0') return false;
return mount->ops->rmdir(mount->fs_private, rel_path);
}
@@ -516,17 +528,21 @@ bool vfs_delete(const char *path) {
char normalized[VFS_MAX_PATH];
vfs_normalize_path(path, normalized);
// Protect root and virtual directories
// Protect root and virtual /dev directory itself
if (normalized[0] == '/' && normalized[1] == '\0') return false;
if (vfs_strcmp(normalized, "/dev") == 0) return false;
if (vfs_starts_with(normalized, "/dev/")) return false;
const char *rel_path = NULL;
vfs_mount_t *mount = vfs_resolve_mount(normalized, &rel_path);
// If it's in /dev/, allow only if it's inside a mount beyond the device node
if (vfs_starts_with(normalized, "/dev/")) {
if (!mount || !rel_path || rel_path[0] == '\0') {
return false; // Protect raw device nodes
}
}
if (!mount || !mount->ops->unlink) return false;
if (!rel_path || rel_path[0] == '\0') return false;
return mount->ops->unlink(mount->fs_private, rel_path);
}