Retire code added to support CloudABI
CloudABI was removed in cf0ee8738e
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880aec7361
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a0558fe90d
@ -906,7 +906,7 @@ kern_dup(struct thread *td, u_int mode, int flags, int old, int new)
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FILEDESC_XLOCK(fdp);
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if (fget_locked(fdp, old) == NULL)
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goto unlock;
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if ((mode == FDDUP_FIXED || mode == FDDUP_MUSTREPLACE) && old == new) {
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if (mode == FDDUP_FIXED && old == new) {
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td->td_retval[0] = new;
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if (flags & FDDUP_FLAG_CLOEXEC)
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fdp->fd_ofiles[new].fde_flags |= UF_EXCLOSE;
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@ -932,13 +932,6 @@ kern_dup(struct thread *td, u_int mode, int flags, int old, int new)
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goto unlock;
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}
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break;
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case FDDUP_MUSTREPLACE:
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/* Target file descriptor must exist. */
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if (fget_locked(fdp, new) == NULL) {
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fdrop(oldfp, td);
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goto unlock;
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}
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break;
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case FDDUP_FIXED:
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if (new >= fdp->fd_nfiles) {
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/*
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@ -2320,14 +2313,6 @@ pdunshare(struct thread *td)
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p->p_pd = pdp;
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}
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void
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fdinstall_remapped(struct thread *td, struct filedesc *fdp)
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{
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fdescfree(td);
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td->td_proc->p_fd = fdp;
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}
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/*
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* Copy a filedesc structure. A NULL pointer in returns a NULL reference,
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* this is to ease callers, not catch errors.
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@ -2380,66 +2365,6 @@ pdcopy(struct pwddesc *pdp)
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return (newpdp);
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}
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/*
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* Copies a filedesc structure, while remapping all file descriptors
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* stored inside using a translation table.
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*
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* File descriptors are copied over to the new file descriptor table,
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* regardless of whether the close-on-exec flag is set.
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*/
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int
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fdcopy_remapped(struct filedesc *fdp, const int *fds, size_t nfds,
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struct filedesc **ret)
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{
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struct filedesc *newfdp;
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struct filedescent *nfde, *ofde;
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int error, i, lastfile;
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MPASS(fdp != NULL);
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newfdp = fdinit(fdp, true, &lastfile);
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if (nfds > lastfile + 1) {
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/* New table cannot be larger than the old one. */
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error = E2BIG;
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goto bad;
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}
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/* Copy all passable descriptors (i.e. not kqueue). */
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newfdp->fd_freefile = nfds;
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for (i = 0; i < nfds; ++i) {
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if (fds[i] < 0 || fds[i] > lastfile) {
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/* File descriptor out of bounds. */
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error = EBADF;
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goto bad;
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}
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ofde = &fdp->fd_ofiles[fds[i]];
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if (ofde->fde_file == NULL) {
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/* Unused file descriptor. */
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error = EBADF;
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goto bad;
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}
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if ((ofde->fde_file->f_ops->fo_flags & DFLAG_PASSABLE) == 0) {
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/* File descriptor cannot be passed. */
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error = EINVAL;
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goto bad;
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}
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if (!fhold(ofde->fde_file)) {
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error = EBADF;
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goto bad;
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}
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nfde = &newfdp->fd_ofiles[i];
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*nfde = *ofde;
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filecaps_copy(&ofde->fde_caps, &nfde->fde_caps, true);
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fdused_init(newfdp, i);
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}
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FILEDESC_SUNLOCK(fdp);
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*ret = newfdp;
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return (0);
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bad:
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FILEDESC_SUNLOCK(fdp);
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fdescfree_remapped(newfdp);
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return (error);
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}
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/*
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* Clear POSIX style locks. This is only used when fdp looses a reference (i.e.
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* one of processes using it exits) and the table used to be shared.
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@ -2526,7 +2451,7 @@ fdclearlocks(struct thread *td)
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* Release a filedesc structure.
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*/
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static void
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fdescfree_fds(struct thread *td, struct filedesc *fdp, bool needclose)
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fdescfree_fds(struct thread *td, struct filedesc *fdp)
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{
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struct filedesc0 *fdp0;
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struct freetable *ft, *tft;
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@ -2551,10 +2476,7 @@ fdescfree_fds(struct thread *td, struct filedesc *fdp, bool needclose)
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fp = fde->fde_file;
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if (fp != NULL) {
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fdefree_last(fde);
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if (needclose)
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(void) closef(fp, td);
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else
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fdrop(fp, td);
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(void) closef(fp, td);
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}
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}
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@ -2598,7 +2520,7 @@ fdescfree(struct thread *td)
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if (refcount_release(&fdp->fd_refcnt) == 0)
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return;
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fdescfree_fds(td, fdp, 1);
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fdescfree_fds(td, fdp);
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}
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void
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@ -2621,17 +2543,6 @@ pdescfree(struct thread *td)
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pddrop(pdp);
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}
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void
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fdescfree_remapped(struct filedesc *fdp)
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{
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#ifdef INVARIANTS
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/* fdescfree_fds() asserts that fd_refcnt == 0. */
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if (!refcount_release(&fdp->fd_refcnt))
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panic("%s: fd table %p has extra references", __func__, fdp);
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#endif
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fdescfree_fds(curthread, fdp, 0);
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}
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/*
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* For setugid programs, we don't want to people to use that setugidness
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* to generate error messages which write to a file which otherwise would
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@ -704,21 +704,14 @@ do_execve(struct thread *td, struct image_args *args, struct mac *mac_p,
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goto exec_fail_dealloc;
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}
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if (args->fdp != NULL) {
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/* Install a brand new file descriptor table. */
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fdinstall_remapped(td, args->fdp);
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args->fdp = NULL;
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} else {
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/*
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* Keep on using the existing file descriptor table. For
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* security and other reasons, the file descriptor table
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* cannot be shared after an exec.
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*/
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fdunshare(td);
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pdunshare(td);
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/* close files on exec */
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fdcloseexec(td);
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}
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/*
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* For security and other reasons, the file descriptor table cannot be
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* shared after an exec.
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*/
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fdunshare(td);
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pdunshare(td);
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/* close files on exec */
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fdcloseexec(td);
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/*
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* Malloc things before we need locks.
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@ -1239,69 +1232,6 @@ exec_copyin_args(struct image_args *args, const char *fname,
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return (error);
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}
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int
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exec_copyin_data_fds(struct thread *td, struct image_args *args,
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const void *data, size_t datalen, const int *fds, size_t fdslen)
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{
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struct filedesc *ofdp;
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const char *p;
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int *kfds;
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int error;
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memset(args, '\0', sizeof(*args));
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ofdp = td->td_proc->p_fd;
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if (datalen >= ARG_MAX || fdslen >= ofdp->fd_nfiles)
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return (E2BIG);
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error = exec_alloc_args(args);
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if (error != 0)
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return (error);
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args->begin_argv = args->buf;
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args->stringspace = ARG_MAX;
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if (datalen > 0) {
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/*
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* Argument buffer has been provided. Copy it into the
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* kernel as a single string and add a terminating null
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* byte.
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*/
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error = copyin(data, args->begin_argv, datalen);
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if (error != 0)
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goto err_exit;
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args->begin_argv[datalen] = '\0';
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args->endp = args->begin_argv + datalen + 1;
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args->stringspace -= datalen + 1;
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/*
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* Traditional argument counting. Count the number of
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* null bytes.
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*/
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for (p = args->begin_argv; p < args->endp; ++p)
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if (*p == '\0')
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++args->argc;
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} else {
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/* No argument buffer provided. */
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args->endp = args->begin_argv;
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}
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/* Create new file descriptor table. */
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kfds = malloc(fdslen * sizeof(int), M_TEMP, M_WAITOK);
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error = copyin(fds, kfds, fdslen * sizeof(int));
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if (error != 0) {
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free(kfds, M_TEMP);
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goto err_exit;
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}
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error = fdcopy_remapped(ofdp, kfds, fdslen, &args->fdp);
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free(kfds, M_TEMP);
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if (error != 0)
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goto err_exit;
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return (0);
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err_exit:
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exec_free_args(args);
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return (error);
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}
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struct exec_args_kva {
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vm_offset_t addr;
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u_int gen;
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@ -1438,8 +1368,6 @@ exec_free_args(struct image_args *args)
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free(args->fname_buf, M_TEMP);
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args->fname_buf = NULL;
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}
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if (args->fdp != NULL)
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fdescfree_remapped(args->fdp);
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}
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/*
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@ -597,8 +597,7 @@ do_fork(struct thread *td, struct fork_req *fr, struct proc *p2, struct thread *
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* been preserved.
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*/
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p2->p_flag |= p1->p_flag & P_SUGID;
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td2->td_pflags |= (td->td_pflags & (TDP_ALTSTACK |
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TDP_SIGFASTBLOCK)) | TDP_FORKING;
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td2->td_pflags |= (td->td_pflags & (TDP_ALTSTACK | TDP_SIGFASTBLOCK));
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SESS_LOCK(p1->p_session);
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if (p1->p_session->s_ttyvp != NULL && p1->p_flag & P_CONTROLT)
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p2->p_flag |= P_CONTROLT;
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@ -1100,7 +1099,6 @@ fork_exit(void (*callout)(void *, struct trapframe *), void *arg,
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if (p->p_sysent->sv_schedtail != NULL)
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(p->p_sysent->sv_schedtail)(td);
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td->td_pflags &= ~TDP_FORKING;
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}
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/*
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@ -215,8 +215,6 @@ syscallret(struct thread *td)
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ksiginfo_t ksi;
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int traced;
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KASSERT((td->td_pflags & TDP_FORKING) == 0,
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("fork() did not clear TDP_FORKING upon completion"));
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KASSERT(td->td_errno != ERELOOKUP,
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("ERELOOKUP not consumed syscall %d", td->td_sa.code));
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@ -203,7 +203,6 @@ enum {
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FDDUP_NORMAL, /* dup() behavior. */
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FDDUP_FCNTL, /* fcntl()-style errors. */
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FDDUP_FIXED, /* Force fixed allocation. */
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FDDUP_MUSTREPLACE, /* Target must exist. */
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FDDUP_LASTMODE,
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};
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@ -250,12 +249,8 @@ void fdclose(struct thread *td, struct file *fp, int idx);
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void fdcloseexec(struct thread *td);
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void fdsetugidsafety(struct thread *td);
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struct filedesc *fdcopy(struct filedesc *fdp);
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int fdcopy_remapped(struct filedesc *fdp, const int *fds, size_t nfds,
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struct filedesc **newfdp);
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void fdinstall_remapped(struct thread *td, struct filedesc *fdp);
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void fdunshare(struct thread *td);
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void fdescfree(struct thread *td);
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void fdescfree_remapped(struct filedesc *fdp);
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int fdlastfile(struct filedesc *fdp);
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int fdlastfile_single(struct filedesc *fdp);
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struct filedesc *fdinit(struct filedesc *fdp, bool prepfiles, int *lastfile);
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@ -55,7 +55,6 @@ struct image_args {
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int argc; /* count of argument strings */
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int envc; /* count of environment strings */
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int fd; /* file descriptor of the executable */
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struct filedesc *fdp; /* new file descriptor table */
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};
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struct image_params {
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@ -120,8 +119,6 @@ void exec_setregs(struct thread *, struct image_params *, uintptr_t);
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int exec_shell_imgact(struct image_params *);
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int exec_copyin_args(struct image_args *, const char *, enum uio_seg,
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char **, char **);
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int exec_copyin_data_fds(struct thread *, struct image_args *, const void *,
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size_t, const int *, size_t);
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void exec_stackgap(struct image_params *imgp, uintptr_t *dp);
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int pre_execve(struct thread *td, struct vmspace **oldvmspace);
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void post_execve(struct thread *td, int error, struct vmspace *oldvmspace);
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@ -524,7 +524,7 @@ do { \
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#define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */
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#define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */
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#define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */
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#define TDP_FORKING 0x20000000 /* Thread is being created through fork() */
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#define TDP_UNUSED0 0x20000000 /* UNUSED */
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#define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */
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#define TDP_SIGFASTPENDING 0x80000000 /* Pending signal due to sigfastblock */
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