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vfs: redo locking

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Matheus
2024-08-26 21:47:23 -03:00
parent da150523ba
commit 42bda0bf92
32 changed files with 271 additions and 169 deletions
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kernel-src/sys/syscalls/fchownat.c
+9 -2
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@@ -27,6 +27,7 @@ syscallret_t syscall_fchownat(context_t *, int fd, char *upath, uid_t owner, gid
node = file->vnode;
VOP_HOLD(node);
VOP_LOCK(node);
fd_release(file);
} else {
// chown is done on the file pointed to by the path relative to fd
@@ -50,13 +51,17 @@ syscallret_t syscall_fchownat(context_t *, int fd, char *upath, uid_t owner, gid
}
ret.errno = auth_filesystem_check(&_cpu()->thread->proc->cred, AUTH_ACTIONS_FILESYSTEM_SETATTR, node);
if (ret.errno)
if (ret.errno) {
VOP_UNLOCK(node);
goto cleanup;
}
vattr_t attr;
ret.errno = VOP_GETATTR(node, &attr, &_cpu()->thread->proc->cred);
if (ret.errno)
if (ret.errno) {
VOP_UNLOCK(node);
goto cleanup;
}
// TODO retain set uid and set gid bits if an auth access was ok
attr.uid = owner;
@@ -66,6 +71,8 @@ syscallret_t syscall_fchownat(context_t *, int fd, char *upath, uid_t owner, gid
ret.errno = VOP_SETATTR(node, &attr, ((owner == -1) ? 0 : V_ATTR_UID) | ((group == -1) ? 0 : V_ATTR_GID), &_cpu()->thread->proc->cred);
ret.ret = ret.errno ? -1 : 0;
VOP_UNLOCK(node);
cleanup:
if (node)
VOP_RELEASE(node);