X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/8f6c56a50524aa785f7e596d52dddfb331e18961..HEAD:/bsd/kern/sys_generic.c diff --git a/bsd/kern/sys_generic.c b/bsd/kern/sys_generic.c index 02286d88d..1d88f75a8 100644 --- a/bsd/kern/sys_generic.c +++ b/bsd/kern/sys_generic.c @@ -1,8 +1,8 @@ /* - * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2015 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ - * + * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in @@ -11,10 +11,10 @@ * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. - * + * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. - * + * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, @@ -22,7 +22,7 @@ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. - * + * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ @@ -65,6 +65,12 @@ * * @(#)sys_generic.c 8.9 (Berkeley) 2/14/95 */ +/* + * NOTICE: This file was modified by SPARTA, Inc. in 2006 to introduce + * support for mandatory and extensible security protections. This notice + * is included in support of clause 2.2 (b) of the Apple Public License, + * Version 2.0. + */ #include #include @@ -73,12 +79,9 @@ #include #include #include -#if KTRACE #include -#else -#include -#endif #include +#include #include #include #include @@ -91,22 +94,33 @@ #include #include #include +#include +#include +#include #include #include #include #include #include #include +#include +#include +#include +#include +#include +#include +#include #include +#include #include #include #include #include #include -#include +#include #include #include @@ -125,240 +139,282 @@ #include #include /* for wait queue based select */ -#include -#include -#if KTRACE -#include -#endif +#include #include +/* for remote time api*/ +#include +#include +#include + +#if CONFIG_MACF +#include +#endif + +/* for entitlement check */ +#include +/* + * If you need accounting for KM_SELECT consider using + * KALLOC_HEAP_DEFINE to define a view. + */ +#define KM_SELECT KHEAP_DEFAULT + +/* XXX should be in a header file somewhere */ +extern kern_return_t IOBSDGetPlatformUUID(__darwin_uuid_t uuid, mach_timespec_t timeoutp); + +int rd_uio(struct proc *p, int fdes, uio_t uio, int is_preadv, user_ssize_t *retval); +int wr_uio(struct proc *p, int fdes, uio_t uio, int is_pwritev, user_ssize_t *retval); +int do_uiowrite(struct proc *p, struct fileproc *fp, uio_t uio, int flags, user_ssize_t *retval); + +__private_extern__ int dofileread(vfs_context_t ctx, struct fileproc *fp, + user_addr_t bufp, user_size_t nbyte, + off_t offset, int flags, user_ssize_t *retval); +__private_extern__ int dofilewrite(vfs_context_t ctx, struct fileproc *fp, + user_addr_t bufp, user_size_t nbyte, + off_t offset, int flags, user_ssize_t *retval); +static int preparefileread(struct proc *p, struct fileproc **fp_ret, int fd, int check_for_vnode); + +/* Conflict wait queue for when selects collide (opaque type) */ +struct waitq select_conflict_queue; + +/* + * Init routine called from bsd_init.c + */ +void select_waitq_init(void); +void +select_waitq_init(void) +{ + waitq_init(&select_conflict_queue, SYNC_POLICY_FIFO); +} + +#define f_flag fp_glob->fg_flag +#define f_type fp_glob->fg_ops->fo_type +#define f_cred fp_glob->fg_cred +#define f_ops fp_glob->fg_ops +#define f_data fp_glob->fg_data -int rd_uio(struct proc *p, int fdes, uio_t uio, user_ssize_t *retval); -int wr_uio(struct proc *p, int fdes, uio_t uio, user_ssize_t *retval); -extern void *get_bsduthreadarg(thread_t); -extern int *get_bsduthreadrval(thread_t); - -__private_extern__ int dofileread(struct proc *p, struct fileproc *fp, int fd, - user_addr_t bufp, user_size_t nbyte, - off_t offset, int flags, user_ssize_t *retval); -__private_extern__ int dofilewrite(struct proc *p, struct fileproc *fp, int fd, - user_addr_t bufp, user_size_t nbyte, - off_t offset, int flags, user_ssize_t *retval); -__private_extern__ int preparefileread(struct proc *p, struct fileproc **fp_ret, int fd, int check_for_vnode); -__private_extern__ void donefileread(struct proc *p, struct fileproc *fp_ret, int fd); - -#if NETAT -extern int appletalk_inited; -#endif /* NETAT */ - -#define f_flag f_fglob->fg_flag -#define f_type f_fglob->fg_type -#define f_msgcount f_fglob->fg_msgcount -#define f_cred f_fglob->fg_cred -#define f_ops f_fglob->fg_ops -#define f_offset f_fglob->fg_offset -#define f_data f_fglob->fg_data /* * Read system call. + * + * Returns: 0 Success + * preparefileread:EBADF + * preparefileread:ESPIPE + * preparefileread:ENXIO + * preparefileread:EBADF + * dofileread:??? */ int -read(p, uap, retval) - struct proc *p; - register struct read_args *uap; - user_ssize_t *retval; +read(struct proc *p, struct read_args *uap, user_ssize_t *retval) +{ + __pthread_testcancel(1); + return read_nocancel(p, (struct read_nocancel_args *)uap, retval); +} + +int +read_nocancel(struct proc *p, struct read_nocancel_args *uap, user_ssize_t *retval) { struct fileproc *fp; int error; int fd = uap->fd; + struct vfs_context context; - if ( (error = preparefileread(p, &fp, fd, 0)) ) - return (error); + if ((error = preparefileread(p, &fp, fd, 0))) { + return error; + } + + context = *(vfs_context_current()); + context.vc_ucred = fp->fp_glob->fg_cred; - error = dofileread(p, fp, uap->fd, uap->cbuf, uap->nbyte, - (off_t)-1, 0, retval); + error = dofileread(&context, fp, uap->cbuf, uap->nbyte, + (off_t)-1, 0, retval); - donefileread(p, fp, fd); + fp_drop(p, fd, fp, 0); - return (error); + return error; } -/* +/* * Pread system call + * + * Returns: 0 Success + * preparefileread:EBADF + * preparefileread:ESPIPE + * preparefileread:ENXIO + * preparefileread:EBADF + * dofileread:??? */ int -pread(p, uap, retval) - struct proc *p; - register struct pread_args *uap; - user_ssize_t *retval; +pread(struct proc *p, struct pread_args *uap, user_ssize_t *retval) { - struct fileproc *fp; + __pthread_testcancel(1); + return pread_nocancel(p, (struct pread_nocancel_args *)uap, retval); +} + +int +pread_nocancel(struct proc *p, struct pread_nocancel_args *uap, user_ssize_t *retval) +{ + struct fileproc *fp = NULL; /* fp set by preparefileread() */ int fd = uap->fd; int error; + struct vfs_context context; + + if ((error = preparefileread(p, &fp, fd, 1))) { + goto out; + } + + context = *(vfs_context_current()); + context.vc_ucred = fp->fp_glob->fg_cred; - if ( (error = preparefileread(p, &fp, fd, 1)) ) - return (error); + error = dofileread(&context, fp, uap->buf, uap->nbyte, + uap->offset, FOF_OFFSET, retval); - error = dofileread(p, fp, uap->fd, uap->buf, uap->nbyte, - uap->offset, FOF_OFFSET, retval); - - donefileread(p, fp, fd); + fp_drop(p, fd, fp, 0); - if (!error) - KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO, SYS_pread) | DBG_FUNC_NONE), - uap->fd, uap->nbyte, (unsigned int)((uap->offset >> 32)), (unsigned int)(uap->offset), 0); - - return (error); + KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO, SYS_pread) | DBG_FUNC_NONE), + uap->fd, uap->nbyte, (unsigned int)((uap->offset >> 32)), (unsigned int)(uap->offset), 0); + +out: + return error; } /* * Code common for read and pread */ -void -donefileread(struct proc *p, struct fileproc *fp, int fd) -{ - proc_fdlock(p); - - fp->f_flags &= ~FP_INCHRREAD; - - fp_drop(p, fd, fp, 1); - proc_fdunlock(p); -} - -int +/* + * Returns: 0 Success + * EBADF + * ESPIPE + * ENXIO + * fp_lookup:EBADF + */ +static int preparefileread(struct proc *p, struct fileproc **fp_ret, int fd, int check_for_pread) { vnode_t vp; - int error; + int error; struct fileproc *fp; - proc_fdlock(p); + AUDIT_ARG(fd, fd); + + proc_fdlock_spin(p); error = fp_lookup(p, fd, &fp, 1); if (error) { - proc_fdunlock(p); - return (error); + proc_fdunlock(p); + return error; } if ((fp->f_flag & FREAD) == 0) { - error = EBADF; + error = EBADF; goto out; } if (check_for_pread && (fp->f_type != DTYPE_VNODE)) { - error = ESPIPE; + error = ESPIPE; goto out; } if (fp->f_type == DTYPE_VNODE) { - vp = (struct vnode *)fp->f_fglob->fg_data; + vp = (struct vnode *)fp->fp_glob->fg_data; - if (vp->v_type == VCHR) - fp->f_flags |= FP_INCHRREAD; + if (check_for_pread && (vnode_isfifo(vp))) { + error = ESPIPE; + goto out; + } + if (check_for_pread && (vp->v_flag & VISTTY)) { + error = ENXIO; + goto out; + } } *fp_ret = fp; - proc_fdunlock(p); - return (0); + proc_fdunlock(p); + return 0; out: fp_drop(p, fd, fp, 1); proc_fdunlock(p); - return (error); + return error; } +/* + * Returns: 0 Success + * EINVAL + * fo_read:??? + */ __private_extern__ int -dofileread(p, fp, fd, bufp, nbyte, offset, flags, retval) - struct proc *p; - struct fileproc *fp; - int fd, flags; - user_addr_t bufp; - user_size_t nbyte; - off_t offset; - user_ssize_t *retval; +dofileread(vfs_context_t ctx, struct fileproc *fp, + user_addr_t bufp, user_size_t nbyte, off_t offset, int flags, + user_ssize_t *retval) { uio_t auio; user_ssize_t bytecnt; - long error = 0; - char uio_buf[ UIO_SIZEOF(1) ]; -#if KTRACE - uio_t ktruio = NULL; - char ktr_uio_buf[ UIO_SIZEOF(1) ]; - int didktr = 0; -#endif + int error = 0; + char uio_buf[UIO_SIZEOF(1)]; - // LP64todo - do we want to raise this? - if (nbyte > INT_MAX) - return (EINVAL); + if (nbyte > INT_MAX) { + return EINVAL; + } - if (IS_64BIT_PROCESS(p)) { - auio = uio_createwithbuffer(1, offset, UIO_USERSPACE64, UIO_READ, - &uio_buf[0], sizeof(uio_buf)); + if (IS_64BIT_PROCESS(vfs_context_proc(ctx))) { + auio = uio_createwithbuffer(1, offset, UIO_USERSPACE64, UIO_READ, + &uio_buf[0], sizeof(uio_buf)); } else { - auio = uio_createwithbuffer(1, offset, UIO_USERSPACE32, UIO_READ, - &uio_buf[0], sizeof(uio_buf)); + auio = uio_createwithbuffer(1, offset, UIO_USERSPACE32, UIO_READ, + &uio_buf[0], sizeof(uio_buf)); } - uio_addiov(auio, bufp, nbyte); - -#if KTRACE - /* - * if tracing, save a copy of iovec - */ - if (KTRPOINT(p, KTR_GENIO)) { - didktr = 1; - - if (IS_64BIT_PROCESS(p)) { - ktruio = uio_createwithbuffer(1, offset, UIO_USERSPACE64, UIO_READ, - &ktr_uio_buf[0], sizeof(ktr_uio_buf)); - } else { - ktruio = uio_createwithbuffer(1, offset, UIO_USERSPACE32, UIO_READ, - &ktr_uio_buf[0], sizeof(ktr_uio_buf)); - } - uio_addiov(ktruio, bufp, nbyte); + if (uio_addiov(auio, bufp, nbyte) != 0) { + *retval = 0; + return EINVAL; } -#endif + bytecnt = nbyte; - if ((error = fo_read(fp, auio, fp->f_cred, flags, p))) { + if ((error = fo_read(fp, auio, flags, ctx))) { if (uio_resid(auio) != bytecnt && (error == ERESTART || - error == EINTR || error == EWOULDBLOCK)) + error == EINTR || error == EWOULDBLOCK)) { error = 0; + } } bytecnt -= uio_resid(auio); -#if KTRACE - if (didktr && error == 0) { - uio_setresid(ktruio, bytecnt); - ktrgenio(p->p_tracep, fd, UIO_READ, ktruio, error); - } -#endif *retval = bytecnt; - return (error); + return error; } -/* - * Scatter read system call. +/* + * Vector read. + * + * Returns: 0 Success + * EINVAL + * ENOMEM + * preparefileread:EBADF + * preparefileread:ESPIPE + * preparefileread:ENXIO + * preparefileread:EBADF + * copyin:EFAULT + * rd_uio:??? */ -int -readv(p, uap, retval) - struct proc *p; - register struct readv_args *uap; - user_ssize_t *retval; +static int +readv_preadv_uio(struct proc *p, int fdes, + user_addr_t user_iovp, int iovcnt, off_t offset, int is_preadv, + user_ssize_t *retval) { uio_t auio = NULL; int error; - int size_of_iovec; struct user_iovec *iovp; - /* Verify range bedfore calling uio_create() */ - if (uap->iovcnt <= 0 || uap->iovcnt > UIO_MAXIOV) - return (EINVAL); + /* Verify range before calling uio_create() */ + if (iovcnt <= 0 || iovcnt > UIO_MAXIOV) { + return EINVAL; + } /* allocate a uio large enough to hold the number of iovecs passed */ - auio = uio_create(uap->iovcnt, 0, - (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), - UIO_READ); - + auio = uio_create(iovcnt, offset, + (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), + UIO_READ); + /* get location of iovecs within the uio. then copyin the iovecs from * user space. */ @@ -367,186 +423,309 @@ readv(p, uap, retval) error = ENOMEM; goto ExitThisRoutine; } - size_of_iovec = (IS_64BIT_PROCESS(p) ? sizeof(struct user_iovec) : sizeof(struct iovec)); - error = copyin(uap->iovp, (caddr_t)iovp, (uap->iovcnt * size_of_iovec)); + error = copyin_user_iovec_array(user_iovp, + IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, + iovcnt, iovp); if (error) { goto ExitThisRoutine; } - - /* finalize uio_t for use and do the IO + + /* finalize uio_t for use and do the IO */ - uio_calculateresid(auio); - error = rd_uio(p, uap->fd, auio, retval); + error = uio_calculateresid(auio); + if (error) { + goto ExitThisRoutine; + } + error = rd_uio(p, fdes, auio, is_preadv, retval); ExitThisRoutine: if (auio != NULL) { uio_free(auio); } - return (error); + return error; +} + +/* + * Scatter read system call. + */ +int +readv(struct proc *p, struct readv_args *uap, user_ssize_t *retval) +{ + __pthread_testcancel(1); + return readv_nocancel(p, (struct readv_nocancel_args *)uap, retval); +} + +int +readv_nocancel(struct proc *p, struct readv_nocancel_args *uap, user_ssize_t *retval) +{ + return readv_preadv_uio(p, uap->fd, uap->iovp, uap->iovcnt, 0, 0, retval); +} + +/* + * Preadv system call + */ +int +sys_preadv(struct proc *p, struct preadv_args *uap, user_ssize_t *retval) +{ + __pthread_testcancel(1); + return sys_preadv_nocancel(p, (struct preadv_nocancel_args *)uap, retval); +} + +int +sys_preadv_nocancel(struct proc *p, struct preadv_nocancel_args *uap, user_ssize_t *retval) +{ + return readv_preadv_uio(p, uap->fd, uap->iovp, uap->iovcnt, uap->offset, 1, retval); } /* * Write system call + * + * Returns: 0 Success + * EBADF + * fp_lookup:EBADF + * dofilewrite:??? */ int -write(p, uap, retval) - struct proc *p; - register struct write_args *uap; - user_ssize_t *retval; +write(struct proc *p, struct write_args *uap, user_ssize_t *retval) +{ + __pthread_testcancel(1); + return write_nocancel(p, (struct write_nocancel_args *)uap, retval); +} + +int +write_nocancel(struct proc *p, struct write_nocancel_args *uap, user_ssize_t *retval) { struct fileproc *fp; - int error; + int error; int fd = uap->fd; - error = fp_lookup(p,fd,&fp,0); - if (error) - return(error); + AUDIT_ARG(fd, fd); + + error = fp_lookup(p, fd, &fp, 0); + if (error) { + return error; + } if ((fp->f_flag & FWRITE) == 0) { error = EBADF; + } else if (fp_isguarded(fp, GUARD_WRITE)) { + proc_fdlock(p); + error = fp_guard_exception(p, fd, fp, kGUARD_EXC_WRITE); + proc_fdunlock(p); } else { - error = dofilewrite(p, fp, uap->fd, uap->cbuf, uap->nbyte, - (off_t)-1, 0, retval); + struct vfs_context context = *(vfs_context_current()); + context.vc_ucred = fp->fp_glob->fg_cred; + + error = dofilewrite(&context, fp, uap->cbuf, uap->nbyte, + (off_t)-1, 0, retval); } - if (error == 0) - fp_drop_written(p, fd, fp); - else - fp_drop(p, fd, fp, 0); - return(error); + fp_drop(p, fd, fp, 0); + return error; } -/* +/* * pwrite system call + * + * Returns: 0 Success + * EBADF + * ESPIPE + * ENXIO + * EINVAL + * fp_lookup:EBADF + * dofilewrite:??? */ int -pwrite(p, uap, retval) - struct proc *p; - register struct pwrite_args *uap; - user_ssize_t *retval; +pwrite(struct proc *p, struct pwrite_args *uap, user_ssize_t *retval) +{ + __pthread_testcancel(1); + return pwrite_nocancel(p, (struct pwrite_nocancel_args *)uap, retval); +} + +int +pwrite_nocancel(struct proc *p, struct pwrite_nocancel_args *uap, user_ssize_t *retval) { - struct fileproc *fp; - int error; + struct fileproc *fp; + int error; int fd = uap->fd; + vnode_t vp = (vnode_t)0; + + AUDIT_ARG(fd, fd); - error = fp_lookup(p,fd,&fp,0); - if (error) - return(error); + error = fp_get_ftype(p, fd, DTYPE_VNODE, ESPIPE, &fp); + if (error) { + return error; + } if ((fp->f_flag & FWRITE) == 0) { error = EBADF; + } else if (fp_isguarded(fp, GUARD_WRITE)) { + proc_fdlock(p); + error = fp_guard_exception(p, fd, fp, kGUARD_EXC_WRITE); + proc_fdunlock(p); } else { - if (fp->f_type != DTYPE_VNODE) { + struct vfs_context context = *vfs_context_current(); + context.vc_ucred = fp->fp_glob->fg_cred; + + vp = (vnode_t)fp->fp_glob->fg_data; + if (vnode_isfifo(vp)) { error = ESPIPE; - } else { - error = dofilewrite(p, fp, uap->fd, uap->buf, uap->nbyte, - uap->offset, FOF_OFFSET, retval); + goto errout; + } + if ((vp->v_flag & VISTTY)) { + error = ENXIO; + goto errout; } - } - if (error == 0) - fp_drop_written(p, fd, fp); - else - fp_drop(p, fd, fp, 0); + if (uap->offset == (off_t)-1) { + error = EINVAL; + goto errout; + } + + error = dofilewrite(&context, fp, uap->buf, uap->nbyte, + uap->offset, FOF_OFFSET, retval); + } +errout: + fp_drop(p, fd, fp, 0); - if (!error) - KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO, SYS_pwrite) | DBG_FUNC_NONE), - uap->fd, uap->nbyte, (unsigned int)((uap->offset >> 32)), (unsigned int)(uap->offset), 0); - - return(error); + KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_SC_EXTENDED_INFO, SYS_pwrite) | DBG_FUNC_NONE), + uap->fd, uap->nbyte, (unsigned int)((uap->offset >> 32)), (unsigned int)(uap->offset), 0); + + return error; } -__private_extern__ int -dofilewrite(p, fp, fd, bufp, nbyte, offset, flags, retval) - struct proc *p; - struct fileproc *fp; - int fd, flags; - user_addr_t bufp; - user_size_t nbyte; - off_t offset; - user_ssize_t *retval; -{ +/* + * Returns: 0 Success + * EINVAL + * :EPIPE + * :??? [indirect through struct fileops] + */ +__private_extern__ int +dofilewrite(vfs_context_t ctx, struct fileproc *fp, + user_addr_t bufp, user_size_t nbyte, off_t offset, int flags, + user_ssize_t *retval) +{ uio_t auio; - long error = 0; + int error = 0; user_ssize_t bytecnt; - char uio_buf[ UIO_SIZEOF(1) ]; -#if KTRACE - uio_t ktruio; - int didktr = 0; - char ktr_uio_buf[ UIO_SIZEOF(1) ]; -#endif + char uio_buf[UIO_SIZEOF(1)]; - // LP64todo - do we want to raise this? - if (nbyte > INT_MAX) - return (EINVAL); + if (nbyte > INT_MAX) { + *retval = 0; + return EINVAL; + } - if (IS_64BIT_PROCESS(p)) { - auio = uio_createwithbuffer(1, offset, UIO_USERSPACE64, UIO_WRITE, - &uio_buf[0], sizeof(uio_buf)); + if (IS_64BIT_PROCESS(vfs_context_proc(ctx))) { + auio = uio_createwithbuffer(1, offset, UIO_USERSPACE64, UIO_WRITE, + &uio_buf[0], sizeof(uio_buf)); } else { - auio = uio_createwithbuffer(1, offset, UIO_USERSPACE32, UIO_WRITE, - &uio_buf[0], sizeof(uio_buf)); + auio = uio_createwithbuffer(1, offset, UIO_USERSPACE32, UIO_WRITE, + &uio_buf[0], sizeof(uio_buf)); } - uio_addiov(auio, bufp, nbyte); - -#if KTRACE - /* - * if tracing, save a copy of iovec and uio - */ - if (KTRPOINT(p, KTR_GENIO)) { - didktr = 1; - - if (IS_64BIT_PROCESS(p)) { - ktruio = uio_createwithbuffer(1, offset, UIO_USERSPACE64, UIO_WRITE, - &ktr_uio_buf[0], sizeof(ktr_uio_buf)); - } else { - ktruio = uio_createwithbuffer(1, offset, UIO_USERSPACE32, UIO_WRITE, - &ktr_uio_buf[0], sizeof(ktr_uio_buf)); - } - uio_addiov(ktruio, bufp, nbyte); + if (uio_addiov(auio, bufp, nbyte) != 0) { + *retval = 0; + return EINVAL; } -#endif - bytecnt = nbyte; - if ((error = fo_write(fp, auio, fp->f_cred, flags, p))) { + + bytecnt = nbyte; + if ((error = fo_write(fp, auio, flags, ctx))) { if (uio_resid(auio) != bytecnt && (error == ERESTART || - error == EINTR || error == EWOULDBLOCK)) + error == EINTR || error == EWOULDBLOCK)) { error = 0; + } /* The socket layer handles SIGPIPE */ - if (error == EPIPE && fp->f_type != DTYPE_SOCKET) - psignal(p, SIGPIPE); + if (error == EPIPE && fp->f_type != DTYPE_SOCKET && + (fp->fp_glob->fg_lflags & FG_NOSIGPIPE) == 0) { + /* XXX Raise the signal on the thread? */ + psignal(vfs_context_proc(ctx), SIGPIPE); + } } bytecnt -= uio_resid(auio); -#if KTRACE - if (didktr && error == 0) { - uio_setresid(ktruio, bytecnt); - ktrgenio(p->p_tracep, fd, UIO_WRITE, ktruio, error); + if (bytecnt) { + os_atomic_or(&fp->fp_glob->fg_flag, FWASWRITTEN, relaxed); } -#endif *retval = bytecnt; - return (error); + return error; } - -/* - * Gather write system call - */ -int -writev(p, uap, retval) - struct proc *p; - register struct writev_args *uap; - user_ssize_t *retval; + +/* + * Returns: 0 Success + * EBADF + * ESPIPE + * ENXIO + * fp_lookup:EBADF + * fp_guard_exception:??? + */ +static int +preparefilewrite(struct proc *p, struct fileproc **fp_ret, int fd, int check_for_pwrite) +{ + vnode_t vp; + int error; + struct fileproc *fp; + + AUDIT_ARG(fd, fd); + + proc_fdlock_spin(p); + + error = fp_lookup(p, fd, &fp, 1); + + if (error) { + proc_fdunlock(p); + return error; + } + if ((fp->f_flag & FWRITE) == 0) { + error = EBADF; + goto ExitThisRoutine; + } + if (fp_isguarded(fp, GUARD_WRITE)) { + error = fp_guard_exception(p, fd, fp, kGUARD_EXC_WRITE); + goto ExitThisRoutine; + } + if (check_for_pwrite) { + if (fp->f_type != DTYPE_VNODE) { + error = ESPIPE; + goto ExitThisRoutine; + } + + vp = (vnode_t)fp->fp_glob->fg_data; + if (vnode_isfifo(vp)) { + error = ESPIPE; + goto ExitThisRoutine; + } + if ((vp->v_flag & VISTTY)) { + error = ENXIO; + goto ExitThisRoutine; + } + } + + *fp_ret = fp; + + proc_fdunlock(p); + return 0; + +ExitThisRoutine: + fp_drop(p, fd, fp, 1); + proc_fdunlock(p); + return error; +} + +static int +writev_prwritev_uio(struct proc *p, int fd, + user_addr_t user_iovp, int iovcnt, off_t offset, int is_pwritev, + user_ssize_t *retval) { uio_t auio = NULL; int error; - int size_of_iovec; struct user_iovec *iovp; - /* Verify range bedfore calling uio_create() */ - if (uap->iovcnt <= 0 || uap->iovcnt > UIO_MAXIOV) - return (EINVAL); + /* Verify range before calling uio_create() */ + if (iovcnt <= 0 || iovcnt > UIO_MAXIOV || offset < 0) { + return EINVAL; + } /* allocate a uio large enough to hold the number of iovecs passed */ - auio = uio_create(uap->iovcnt, 0, - (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), - UIO_WRITE); - + auio = uio_create(iovcnt, offset, + (IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32), + UIO_WRITE); + /* get location of iovecs within the uio. then copyin the iovecs from * user space. */ @@ -555,227 +734,197 @@ writev(p, uap, retval) error = ENOMEM; goto ExitThisRoutine; } - size_of_iovec = (IS_64BIT_PROCESS(p) ? sizeof(struct user_iovec) : sizeof(struct iovec)); - error = copyin(uap->iovp, (caddr_t)iovp, (uap->iovcnt * size_of_iovec)); + error = copyin_user_iovec_array(user_iovp, + IS_64BIT_PROCESS(p) ? UIO_USERSPACE64 : UIO_USERSPACE32, + iovcnt, iovp); if (error) { goto ExitThisRoutine; } - - /* finalize uio_t for use and do the IO + + /* finalize uio_t for use and do the IO */ - uio_calculateresid(auio); - error = wr_uio(p, uap->fd, auio, retval); + error = uio_calculateresid(auio); + if (error) { + goto ExitThisRoutine; + } + + error = wr_uio(p, fd, auio, is_pwritev, retval); ExitThisRoutine: if (auio != NULL) { uio_free(auio); } - return (error); + return error; +} + +/* + * Gather write system call + */ +int +writev(struct proc *p, struct writev_args *uap, user_ssize_t *retval) +{ + __pthread_testcancel(1); + return writev_nocancel(p, (struct writev_nocancel_args *)uap, retval); } +int +writev_nocancel(struct proc *p, struct writev_nocancel_args *uap, user_ssize_t *retval) +{ + return writev_prwritev_uio(p, uap->fd, uap->iovp, uap->iovcnt, 0, 0, retval); +} +/* + * Pwritev system call + */ int -wr_uio(p, fdes, uio, retval) - struct proc *p; - int fdes; - register uio_t uio; - user_ssize_t *retval; +sys_pwritev(struct proc *p, struct pwritev_args *uap, user_ssize_t *retval) +{ + __pthread_testcancel(1); + return sys_pwritev_nocancel(p, (struct pwritev_nocancel_args *)uap, retval); +} + +int +sys_pwritev_nocancel(struct proc *p, struct pwritev_nocancel_args *uap, user_ssize_t *retval) +{ + return writev_prwritev_uio(p, uap->fd, uap->iovp, uap->iovcnt, uap->offset, 1, retval); +} + +/* + * Returns: 0 Success + * preparefileread:EBADF + * preparefileread:ESPIPE + * preparefileread:ENXIO + * preparefileread:??? + * fo_write:??? + */ +int +wr_uio(struct proc *p, int fd, uio_t uio, int is_pwritev, user_ssize_t *retval) { struct fileproc *fp; int error; - user_ssize_t count; -#if KTRACE - struct iovec_64 *ktriov = NULL; - struct uio ktruio; - int didktr = 0; - u_int iovlen; -#endif - - error = fp_lookup(p,fdes,&fp,0); - if (error) - return(error); + int flags; - if ((fp->f_flag & FWRITE) == 0) { - error = EBADF; - goto out; + if ((error = preparefilewrite(p, &fp, fd, is_pwritev))) { + return error; } - count = uio_resid(uio); -#if KTRACE - /* - * if tracing, save a copy of iovec - */ - if (KTRPOINT(p, KTR_GENIO)) { - iovlen = uio->uio_iovcnt * - (IS_64BIT_PROCESS(p) ? sizeof (struct iovec_64) : sizeof (struct iovec_32)); - MALLOC(ktriov, struct iovec_64 *, iovlen, M_TEMP, M_WAITOK); - if (ktriov != NULL) { - bcopy((caddr_t)uio->uio_iovs.iov64p, (caddr_t)ktriov, iovlen); - ktruio = *uio; - didktr = 1; - } - } -#endif - error = fo_write(fp, uio, fp->f_cred, 0, p); + + flags = is_pwritev ? FOF_OFFSET : 0; + error = do_uiowrite(p, fp, uio, flags, retval); + + fp_drop(p, fd, fp, 0); + + return error; +} + +int +do_uiowrite(struct proc *p, struct fileproc *fp, uio_t uio, int flags, user_ssize_t *retval) +{ + int error; + user_ssize_t count; + struct vfs_context context = *vfs_context_current(); + + count = uio_resid(uio); + + context.vc_ucred = fp->f_cred; + error = fo_write(fp, uio, flags, &context); if (error) { if (uio_resid(uio) != count && (error == ERESTART || - error == EINTR || error == EWOULDBLOCK)) - error = 0; + error == EINTR || error == EWOULDBLOCK)) { + error = 0; + } /* The socket layer handles SIGPIPE */ - if (error == EPIPE && fp->f_type != DTYPE_SOCKET) - psignal(p, SIGPIPE); - } - *retval = count - uio_resid(uio); - -#if KTRACE - if (didktr) { - if (error == 0) { - ktruio.uio_iovs.iov64p = ktriov; - uio_setresid(&ktruio, *retval); - ktrgenio(p->p_tracep, fdes, UIO_WRITE, &ktruio, error); + if (error == EPIPE && fp->f_type != DTYPE_SOCKET && + (fp->fp_glob->fg_lflags & FG_NOSIGPIPE) == 0) { + psignal(p, SIGPIPE); } - FREE(ktriov, M_TEMP); } -#endif + count -= uio_resid(uio); + if (count) { + os_atomic_or(&fp->fp_glob->fg_flag, FWASWRITTEN, relaxed); + } + *retval = count; -out: - if ( (error == 0) ) - fp_drop_written(p, fdes, fp); - else - fp_drop(p, fdes, fp, 0); - return(error); + return error; } - +/* + * Returns: 0 Success + * preparefileread:EBADF + * preparefileread:ESPIPE + * preparefileread:ENXIO + * fo_read:??? + */ int -rd_uio(p, fdes, uio, retval) - struct proc *p; - int fdes; - register uio_t uio; - user_ssize_t *retval; +rd_uio(struct proc *p, int fdes, uio_t uio, int is_preadv, user_ssize_t *retval) { struct fileproc *fp; int error; user_ssize_t count; -#if KTRACE - struct iovec_64 *ktriov = NULL; - struct uio ktruio; - int didktr = 0; - u_int iovlen; -#endif + struct vfs_context context = *vfs_context_current(); - if ( (error = preparefileread(p, &fp, fdes, 0)) ) - return (error); + if ((error = preparefileread(p, &fp, fdes, is_preadv))) { + return error; + } count = uio_resid(uio); -#if KTRACE - /* - * if tracing, save a copy of iovec - */ - if (KTRPOINT(p, KTR_GENIO)) { - iovlen = uio->uio_iovcnt * - (IS_64BIT_PROCESS(p) ? sizeof (struct iovec_64) : sizeof (struct iovec_32)); - MALLOC(ktriov, struct iovec_64 *, iovlen, M_TEMP, M_WAITOK); - if (ktriov != NULL) { - bcopy((caddr_t)uio->uio_iovs.iov64p, (caddr_t)ktriov, iovlen); - ktruio = *uio; - didktr = 1; - } - } -#endif - error = fo_read(fp, uio, fp->f_cred, 0, p); + + context.vc_ucred = fp->f_cred; + + int flags = is_preadv ? FOF_OFFSET : 0; + error = fo_read(fp, uio, flags, &context); if (error) { - if (uio_resid(uio) != count && (error == ERESTART || - error == EINTR || error == EWOULDBLOCK)) - error = 0; + if (uio_resid(uio) != count && (error == ERESTART || + error == EINTR || error == EWOULDBLOCK)) { + error = 0; + } } *retval = count - uio_resid(uio); -#if KTRACE - if (didktr) { - if (error == 0) { - ktruio.uio_iovs.iov64p = ktriov; - uio_setresid(&ktruio, *retval); - ktrgenio(p->p_tracep, fdes, UIO_READ, &ktruio, error); - } - FREE(ktriov, M_TEMP); - } -#endif - donefileread(p, fp, fdes); + fp_drop(p, fdes, fp, 0); - return (error); + return error; } /* * Ioctl system call * + * Returns: 0 Success + * EBADF + * ENOTTY + * ENOMEM + * ESRCH + * copyin:EFAULT + * copyoutEFAULT + * fp_lookup:EBADF Bad file descriptor + * fo_ioctl:??? */ int -ioctl(struct proc *p, register struct ioctl_args *uap, __unused register_t *retval) +ioctl(struct proc *p, struct ioctl_args *uap, __unused int32_t *retval) { - struct fileproc *fp; - register u_long com; + struct fileproc *fp = NULL; int error = 0; - register u_int size; - caddr_t datap, memp; - boolean_t is64bit; - int tmp; -#define STK_PARAMS 128 - char stkbuf[STK_PARAMS]; + u_int size = 0; + caddr_t datap = NULL, memp = NULL; + boolean_t is64bit = FALSE; + int tmp = 0; +#define STK_PARAMS 128 + char stkbuf[STK_PARAMS] = {}; int fd = uap->fd; + u_long com = uap->com; + struct vfs_context context = *vfs_context_current(); AUDIT_ARG(fd, uap->fd); - AUDIT_ARG(cmd, CAST_DOWN(int, uap->com)); /* LP64todo: uap->com is a user-land long */ AUDIT_ARG(addr, uap->data); is64bit = proc_is64bit(p); - - proc_fdlock(p); - error = fp_lookup(p,fd,&fp,1); - if (error) { - proc_fdunlock(p); - return(error); - } - - AUDIT_ARG(file, p, fp); - - if ((fp->f_flag & (FREAD | FWRITE)) == 0) { - error = EBADF; - goto out; - } - -#if NETAT - /* - * ### LD 6/11/97 Hack Alert: this is to get AppleTalk to work - * while implementing an ATioctl system call - */ - { - if (appletalk_inited && ((uap->com & 0x0000FFFF) == 0xff99)) { - u_long fixed_command; -#ifdef APPLETALK_DEBUG - kprintf("ioctl: special AppleTalk \n"); -#endif - datap = &stkbuf[0]; - *(user_addr_t *)datap = uap->data; - fixed_command = _IOW(0, 0xff99, uap->data); - error = fo_ioctl(fp, fixed_command, datap, p); - goto out; - } - } - -#endif /* NETAT */ - - - switch (com = uap->com) { - case FIONCLEX: - *fdflags(p, uap->fd) &= ~UF_EXCLOSE; - error =0; - goto out; - case FIOCLEX: - *fdflags(p, uap->fd) |= UF_EXCLOSE; - error =0; - goto out; +#if CONFIG_AUDIT + if (is64bit) { + AUDIT_ARG(value64, com); + } else { + AUDIT_ARG(cmd, CAST_DOWN_EXPLICIT(int, com)); } +#endif /* CONFIG_AUDIT */ /* * Interpret high order word to find amount of data to be @@ -783,273 +932,471 @@ ioctl(struct proc *p, register struct ioctl_args *uap, __unused register_t *retv */ size = IOCPARM_LEN(com); if (size > IOCPARM_MAX) { - error = ENOTTY; - goto out; + return ENOTTY; } - memp = NULL; - if (size > sizeof (stkbuf)) { - proc_fdunlock(p); - if ((memp = (caddr_t)kalloc(size)) == 0) { - proc_fdlock(p); - error = ENOMEM; - goto out; + if (size > sizeof(stkbuf)) { + memp = (caddr_t)kheap_alloc(KHEAP_TEMP, size, Z_WAITOK); + if (memp == 0) { + return ENOMEM; } - proc_fdlock(p); datap = memp; - } else + } else { datap = &stkbuf[0]; - if (com&IOC_IN) { + } + if (com & IOC_IN) { if (size) { - proc_fdunlock(p); error = copyin(uap->data, datap, size); if (error) { - if (memp) - kfree(memp, size); - proc_fdlock(p); - goto out; + goto out_nofp; } - proc_fdlock(p); } else { /* XXX - IOC_IN and no size? we should proably return an error here!! */ if (is64bit) { *(user_addr_t *)datap = uap->data; - } - else { + } else { *(uint32_t *)datap = (uint32_t)uap->data; } } - } else if ((com&IOC_OUT) && size) + } else if ((com & IOC_OUT) && size) { /* * Zero the buffer so the user always * gets back something deterministic. */ bzero(datap, size); - else if (com&IOC_VOID) { + } else if (com & IOC_VOID) { /* XXX - this is odd since IOC_VOID means no parameters */ if (is64bit) { *(user_addr_t *)datap = uap->data; - } - else { + } else { *(uint32_t *)datap = (uint32_t)uap->data; } } + proc_fdlock(p); + error = fp_lookup(p, fd, &fp, 1); + if (error) { + proc_fdunlock(p); + goto out_nofp; + } + + AUDIT_ARG(file, p, fp); + + if ((fp->f_flag & (FREAD | FWRITE)) == 0) { + error = EBADF; + goto out; + } + + context.vc_ucred = fp->fp_glob->fg_cred; + +#if CONFIG_MACF + error = mac_file_check_ioctl(context.vc_ucred, fp->fp_glob, com); + if (error) { + goto out; + } +#endif + switch (com) { + case FIONCLEX: + *fdflags(p, fd) &= ~UF_EXCLOSE; + break; + + case FIOCLEX: + *fdflags(p, fd) |= UF_EXCLOSE; + break; case FIONBIO: - if ( (tmp = *(int *)datap) ) - fp->f_flag |= FNONBLOCK; - else - fp->f_flag &= ~FNONBLOCK; - error = fo_ioctl(fp, FIONBIO, (caddr_t)&tmp, p); + // FIXME (rdar://54898652) + // + // this code is broken if fnctl(F_SETFL), ioctl() are + // called concurrently for the same fileglob. + if ((tmp = *(int *)datap)) { + os_atomic_or(&fp->f_flag, FNONBLOCK, relaxed); + } else { + os_atomic_andnot(&fp->f_flag, FNONBLOCK, relaxed); + } + error = fo_ioctl(fp, FIONBIO, (caddr_t)&tmp, &context); break; case FIOASYNC: - if ( (tmp = *(int *)datap) ) - fp->f_flag |= FASYNC; - else - fp->f_flag &= ~FASYNC; - error = fo_ioctl(fp, FIOASYNC, (caddr_t)&tmp, p); + // FIXME (rdar://54898652) + // + // this code is broken if fnctl(F_SETFL), ioctl() are + // called concurrently for the same fileglob. + if ((tmp = *(int *)datap)) { + os_atomic_or(&fp->f_flag, FASYNC, relaxed); + } else { + os_atomic_andnot(&fp->f_flag, FASYNC, relaxed); + } + error = fo_ioctl(fp, FIOASYNC, (caddr_t)&tmp, &context); break; case FIOSETOWN: tmp = *(int *)datap; if (fp->f_type == DTYPE_SOCKET) { ((struct socket *)fp->f_data)->so_pgid = tmp; - error = 0; break; } if (fp->f_type == DTYPE_PIPE) { - error = fo_ioctl(fp, (int)TIOCSPGRP, (caddr_t)&tmp, p); + error = fo_ioctl(fp, TIOCSPGRP, (caddr_t)&tmp, &context); break; } if (tmp <= 0) { tmp = -tmp; } else { - struct proc *p1 = pfind(tmp); + struct proc *p1 = proc_find(tmp); if (p1 == 0) { error = ESRCH; break; } - tmp = p1->p_pgrp->pg_id; + tmp = p1->p_pgrpid; + proc_rele(p1); } - error = fo_ioctl(fp, (int)TIOCSPGRP, (caddr_t)&tmp, p); + error = fo_ioctl(fp, TIOCSPGRP, (caddr_t)&tmp, &context); break; case FIOGETOWN: if (fp->f_type == DTYPE_SOCKET) { - error = 0; *(int *)datap = ((struct socket *)fp->f_data)->so_pgid; break; } - error = fo_ioctl(fp, TIOCGPGRP, datap, p); + error = fo_ioctl(fp, TIOCGPGRP, datap, &context); *(int *)datap = -*(int *)datap; break; default: - error = fo_ioctl(fp, com, datap, p); + error = fo_ioctl(fp, com, datap, &context); /* * Copy any data to user, size was * already set and checked above. */ - if (error == 0 && (com&IOC_OUT) && size) + if (error == 0 && (com & IOC_OUT) && size) { error = copyout(datap, uap->data, (u_int)size); + } break; } - proc_fdunlock(p); - if (memp) - kfree(memp, size); - proc_fdlock(p); out: fp_drop(p, fd, fp, 1); proc_fdunlock(p); - return(error); + +out_nofp: + if (memp) { + kheap_free(KHEAP_TEMP, memp, size); + } + return error; } -int selwait, nselcoll; +int selwait, nselcoll; #define SEL_FIRSTPASS 1 #define SEL_SECONDPASS 2 extern int selcontinue(int error); extern int selprocess(int error, int sel_pass); -static int selscan(struct proc *p, struct _select * sel, - int nfd, register_t *retval, int sel_pass, wait_queue_sub_t wqsub); -static int selcount(struct proc *p, u_int32_t *ibits, u_int32_t *obits, - int nfd, int * count); -static int seldrop(struct proc *p, u_int32_t *ibits, int nfd); -extern uint64_t tvtoabstime(struct timeval *tvp); +static int selscan(struct proc *p, struct _select * sel, struct _select_data * seldata, + int nfd, int32_t *retval, int sel_pass, struct waitq_set *wqset); +static int selcount(struct proc *p, u_int32_t *ibits, int nfd, int *count); +static int seldrop_locked(struct proc *p, u_int32_t *ibits, int nfd, int lim, int *need_wakeup); +static int seldrop(struct proc *p, u_int32_t *ibits, int nfd, int lim); +static int select_internal(struct proc *p, struct select_nocancel_args *uap, uint64_t timeout, int32_t *retval); /* * Select system call. + * + * Returns: 0 Success + * EINVAL Invalid argument + * EAGAIN Nonconformant error if allocation fails */ int -select(struct proc *p, struct select_args *uap, register_t *retval) +select(struct proc *p, struct select_args *uap, int32_t *retval) +{ + __pthread_testcancel(1); + return select_nocancel(p, (struct select_nocancel_args *)uap, retval); +} + +int +select_nocancel(struct proc *p, struct select_nocancel_args *uap, int32_t *retval) +{ + uint64_t timeout = 0; + + if (uap->tv) { + int err; + struct timeval atv; + if (IS_64BIT_PROCESS(p)) { + struct user64_timeval atv64; + err = copyin(uap->tv, (caddr_t)&atv64, sizeof(atv64)); + /* Loses resolution - assume timeout < 68 years */ + atv.tv_sec = (__darwin_time_t)atv64.tv_sec; + atv.tv_usec = atv64.tv_usec; + } else { + struct user32_timeval atv32; + err = copyin(uap->tv, (caddr_t)&atv32, sizeof(atv32)); + atv.tv_sec = atv32.tv_sec; + atv.tv_usec = atv32.tv_usec; + } + if (err) { + return err; + } + + if (itimerfix(&atv)) { + err = EINVAL; + return err; + } + + clock_absolutetime_interval_to_deadline(tvtoabstime(&atv), &timeout); + } + + return select_internal(p, uap, timeout, retval); +} + +int +pselect(struct proc *p, struct pselect_args *uap, int32_t *retval) +{ + __pthread_testcancel(1); + return pselect_nocancel(p, (struct pselect_nocancel_args *)uap, retval); +} + +int +pselect_nocancel(struct proc *p, struct pselect_nocancel_args *uap, int32_t *retval) +{ + int err; + struct uthread *ut; + uint64_t timeout = 0; + + if (uap->ts) { + struct timespec ts; + + if (IS_64BIT_PROCESS(p)) { + struct user64_timespec ts64; + err = copyin(uap->ts, (caddr_t)&ts64, sizeof(ts64)); + ts.tv_sec = (__darwin_time_t)ts64.tv_sec; + ts.tv_nsec = (long)ts64.tv_nsec; + } else { + struct user32_timespec ts32; + err = copyin(uap->ts, (caddr_t)&ts32, sizeof(ts32)); + ts.tv_sec = ts32.tv_sec; + ts.tv_nsec = ts32.tv_nsec; + } + if (err) { + return err; + } + + if (!timespec_is_valid(&ts)) { + return EINVAL; + } + clock_absolutetime_interval_to_deadline(tstoabstime(&ts), &timeout); + } + + ut = get_bsdthread_info(current_thread()); + + if (uap->mask != USER_ADDR_NULL) { + /* save current mask, then copyin and set new mask */ + sigset_t newset; + err = copyin(uap->mask, &newset, sizeof(sigset_t)); + if (err) { + return err; + } + ut->uu_oldmask = ut->uu_sigmask; + ut->uu_flag |= UT_SAS_OLDMASK; + ut->uu_sigmask = (newset & ~sigcantmask); + } + + err = select_internal(p, (struct select_nocancel_args *)uap, timeout, retval); + + if (err != EINTR && ut->uu_flag & UT_SAS_OLDMASK) { + /* + * Restore old mask (direct return case). NOTE: EINTR can also be returned + * if the thread is cancelled. In that case, we don't reset the signal + * mask to its original value (which usually happens in the signal + * delivery path). This behavior is permitted by POSIX. + */ + ut->uu_sigmask = ut->uu_oldmask; + ut->uu_oldmask = 0; + ut->uu_flag &= ~UT_SAS_OLDMASK; + } + + return err; +} + +void +select_cleanup_uthread(struct _select *sel) +{ + kheap_free(KHEAP_DATA_BUFFERS, sel->ibits, 2 * sel->nbytes); + sel->ibits = sel->obits = NULL; + sel->nbytes = 0; +} + +static int +select_grow_uthread_cache(struct _select *sel, uint32_t nbytes) +{ + uint32_t *buf; + + buf = kheap_alloc(KHEAP_DATA_BUFFERS, 2 * nbytes, Z_WAITOK | Z_ZERO); + if (buf) { + select_cleanup_uthread(sel); + sel->ibits = buf; + sel->obits = buf + nbytes / sizeof(uint32_t); + sel->nbytes = nbytes; + return true; + } + return false; +} + +static void +select_bzero_uthread_cache(struct _select *sel) +{ + bzero(sel->ibits, sel->nbytes * 2); +} + +/* + * Generic implementation of {,p}select. Care: we type-pun uap across the two + * syscalls, which differ slightly. The first 4 arguments (nfds and the fd sets) + * are identical. The 5th (timeout) argument points to different types, so we + * unpack in the syscall-specific code, but the generic code still does a null + * check on this argument to determine if a timeout was specified. + */ +static int +select_internal(struct proc *p, struct select_nocancel_args *uap, uint64_t timeout, int32_t *retval) { int error = 0; - u_int ni, nw, size; + u_int ni, nw; thread_t th_act; - struct uthread *uth; + struct uthread *uth; struct _select *sel; - int needzerofill = 1; + struct _select_data *seldata; int count = 0; + size_t sz = 0; th_act = current_thread(); uth = get_bsdthread_info(th_act); sel = &uth->uu_select; - retval = (int *)get_bsduthreadrval(th_act); + seldata = &uth->uu_save.uus_select_data; *retval = 0; + seldata->args = uap; + seldata->retval = retval; + seldata->wqp = NULL; + seldata->count = 0; + if (uap->nd < 0) { - return (EINVAL); + return EINVAL; } - if (uap->nd > p->p_fd->fd_nfiles) - uap->nd = p->p_fd->fd_nfiles; /* forgiving; slightly wrong */ + /* select on thread of process that already called proc_exit() */ + if (p->p_fd == NULL) { + return EBADF; + } + if (uap->nd > p->p_fd->fd_nfiles) { + uap->nd = p->p_fd->fd_nfiles; /* forgiving; slightly wrong */ + } nw = howmany(uap->nd, NFDBITS); ni = nw * sizeof(fd_mask); /* - * if this is the first select by the thread - * allocate the space for bits. - */ - if (sel->nbytes == 0) { - sel->nbytes = 3 * ni; - MALLOC(sel->ibits, u_int32_t *, sel->nbytes, M_TEMP, M_WAITOK | M_ZERO); - MALLOC(sel->obits, u_int32_t *, sel->nbytes, M_TEMP, M_WAITOK | M_ZERO); - if ((sel->ibits == NULL) || (sel->obits == NULL)) - panic("select out of memory"); - needzerofill = 0; - } - - /* - * if the previously allocated space for the bits - * is smaller than what is requested. Reallocate. + * if the previously allocated space for the bits is smaller than + * what is requested or no space has yet been allocated for this + * thread, allocate enough space now. + * + * Note: If this process fails, select() will return EAGAIN; this + * is the same thing pool() returns in a no-memory situation, but + * it is not a POSIX compliant error code for select(). */ if (sel->nbytes < (3 * ni)) { - sel->nbytes = (3 * ni); - FREE(sel->ibits, M_TEMP); - FREE(sel->obits, M_TEMP); - MALLOC(sel->ibits, u_int32_t *, sel->nbytes, M_TEMP, M_WAITOK | M_ZERO); - MALLOC(sel->obits, u_int32_t *, sel->nbytes, M_TEMP, M_WAITOK | M_ZERO); - if ((sel->ibits == NULL) || (sel->obits == NULL)) - panic("select out of memory"); - needzerofill = 0; - } - - if (needzerofill) { - bzero((caddr_t)sel->ibits, sel->nbytes); - bzero((caddr_t)sel->obits, sel->nbytes); + if (!select_grow_uthread_cache(sel, 3 * ni)) { + return EAGAIN; + } + } else { + select_bzero_uthread_cache(sel); } /* * get the bits from the user address space */ -#define getbits(name, x) \ +#define getbits(name, x) \ do { \ - if (uap->name && (error = copyin(uap->name, \ - (caddr_t)&sel->ibits[(x) * nw], ni))) \ - goto continuation; \ + if (uap->name && (error = copyin(uap->name, \ + (caddr_t)&sel->ibits[(x) * nw], ni))) \ + goto continuation; \ } while (0) getbits(in, 0); getbits(ou, 1); getbits(ex, 2); -#undef getbits +#undef getbits - if (uap->tv) { - struct timeval atv; - if (IS_64BIT_PROCESS(p)) { - struct user_timeval atv64; - error = copyin(uap->tv, (caddr_t)&atv64, sizeof(atv64)); - /* Loses resolution - assume timeout < 68 years */ - atv.tv_sec = atv64.tv_sec; - atv.tv_usec = atv64.tv_usec; - } else { - error = copyin(uap->tv, (caddr_t)&atv, sizeof(atv)); - } - if (error) - goto continuation; - if (itimerfix(&atv)) { - error = EINVAL; - goto continuation; - } + seldata->abstime = timeout; - clock_absolutetime_interval_to_deadline( - tvtoabstime(&atv), &sel->abstime); + if ((error = selcount(p, sel->ibits, uap->nd, &count))) { + goto continuation; } - else - sel->abstime = 0; - if ( (error = selcount(p, sel->ibits, sel->obits, uap->nd, &count)) ) { - goto continuation; + /* + * We need an array of waitq pointers. This is due to the new way + * in which waitqs are linked to sets. When a thread selects on a + * file descriptor, a waitq (embedded in a selinfo structure) is + * added to the thread's local waitq set. There is no longer any + * way to directly iterate over all members of a given waitq set. + * The process of linking a waitq into a set may allocate a link + * table object. Because we can't iterate over all the waitqs to + * which our thread waitq set belongs, we need a way of removing + * this link object! + * + * Thus we need a buffer which will hold one waitq pointer + * per FD being selected. During the tear-down phase we can use + * these pointers to dis-associate the underlying selinfo's waitq + * from our thread's waitq set. + * + * Because we also need to allocate a waitq set for this thread, + * we use a bare buffer pointer to hold all the memory. Note that + * this memory is cached in the thread pointer and not reaped until + * the thread exists. This is generally OK because threads that + * call select tend to keep calling select repeatedly. + */ + sz = ALIGN(sizeof(struct waitq_set)) + (count * sizeof(uint64_t)); + if (sz > uth->uu_wqstate_sz) { + /* (re)allocate a buffer to hold waitq pointers */ + if (uth->uu_wqset) { + if (waitq_set_is_valid(uth->uu_wqset)) { + waitq_set_deinit(uth->uu_wqset); + } + kheap_free(KM_SELECT, uth->uu_wqset, uth->uu_wqstate_sz); + } else if (uth->uu_wqstate_sz && !uth->uu_wqset) { + panic("select: thread structure corrupt! " + "uu_wqstate_sz:%ld, wqstate_buf == NULL", + uth->uu_wqstate_sz); + } + uth->uu_wqstate_sz = sz; + uth->uu_wqset = kheap_alloc(KM_SELECT, sz, Z_WAITOK); + if (!uth->uu_wqset) { + panic("can't allocate %ld bytes for wqstate buffer", + uth->uu_wqstate_sz); + } + waitq_set_init(uth->uu_wqset, + SYNC_POLICY_FIFO | SYNC_POLICY_PREPOST, NULL, NULL); } - sel->count = count; - size = SIZEOF_WAITQUEUE_SET + (count * SIZEOF_WAITQUEUE_LINK); - if (sel->allocsize) { - if (sel->wqset == 0) - panic("select: wql memory smashed"); - /* needed for the select now */ - if (size > sel->allocsize) { - kfree(sel->wqset, sel->allocsize); - sel->allocsize = size; - sel->wqset = (wait_queue_set_t)kalloc(size); - if (sel->wqset == (wait_queue_set_t)NULL) - panic("failed to allocate memory for waitqueue\n"); - } - } else { - sel->count = count; - sel->allocsize = size; - sel->wqset = (wait_queue_set_t)kalloc(sel->allocsize); - if (sel->wqset == (wait_queue_set_t)NULL) - panic("failed to allocate memory for waitqueue\n"); + if (!waitq_set_is_valid(uth->uu_wqset)) { + waitq_set_init(uth->uu_wqset, + SYNC_POLICY_FIFO | SYNC_POLICY_PREPOST, NULL, NULL); } - bzero(sel->wqset, size); - sel->wql = (char *)sel->wqset + SIZEOF_WAITQUEUE_SET; - wait_queue_set_init(sel->wqset, (SYNC_POLICY_FIFO | SYNC_POLICY_PREPOST)); + + /* the last chunk of our buffer is an array of waitq pointers */ + seldata->wqp = (uint64_t *)((char *)(uth->uu_wqset) + ALIGN(sizeof(struct waitq_set))); + bzero(seldata->wqp, sz - ALIGN(sizeof(struct waitq_set))); + + seldata->count = count; continuation: - return selprocess(error, SEL_FIRSTPASS); + + if (error) { + /* + * We have already cleaned up any state we established, + * either locally or as a result of selcount(). We don't + * need to wait_subqueue_unlink_all(), since we haven't set + * anything at this point. + */ + return error; + } + + return selprocess(0, SEL_FIRSTPASS); } int @@ -1058,17 +1405,25 @@ selcontinue(int error) return selprocess(error, SEL_SECONDPASS); } + +/* + * selprocess + * + * Parameters: error The error code from our caller + * sel_pass The pass we are on + */ int selprocess(int error, int sel_pass) { int ncoll; u_int ni, nw; thread_t th_act; - struct uthread *uth; + struct uthread *uth; struct proc *p; - struct select_args *uap; + struct select_nocancel_args *uap; int *retval; struct _select *sel; + struct _select_data *seldata; int unwind = 1; int prepost = 0; int somewakeup = 0; @@ -1077,51 +1432,51 @@ selprocess(int error, int sel_pass) p = current_proc(); th_act = current_thread(); - uap = (struct select_args *)get_bsduthreadarg(th_act); - retval = (int *)get_bsduthreadrval(th_act); uth = get_bsdthread_info(th_act); sel = &uth->uu_select; + seldata = &uth->uu_save.uus_select_data; + uap = seldata->args; + retval = seldata->retval; - /* if it is first pass wait queue is not setup yet */ - if ((error != 0) && (sel_pass == SEL_FIRSTPASS)) - unwind = 0; - if (sel->count == 0) - unwind = 0; + if ((error != 0) && (sel_pass == SEL_FIRSTPASS)) { + unwind = 0; + } + if (seldata->count == 0) { + unwind = 0; + } retry: if (error != 0) { - goto done; + goto done; } ncoll = nselcoll; - p->p_flag |= P_SELECT; - /* skip scans if the select is just for timeouts */ - if (sel->count) { - if (sel_pass == SEL_FIRSTPASS) - wait_queue_sub_clearrefs(sel->wqset); + OSBitOrAtomic(P_SELECT, &p->p_flag); - error = selscan(p, sel, uap->nd, retval, sel_pass, sel->wqset); + /* skip scans if the select is just for timeouts */ + if (seldata->count) { + error = selscan(p, sel, seldata, uap->nd, retval, sel_pass, uth->uu_wqset); if (error || *retval) { goto done; } - if (prepost) { - /* if the select of log, then we canwakeup and discover some one - * else already read the data; go toselct again if time permits - */ - prepost = 0; - doretry = 1; - } - if (somewakeup) { - somewakeup = 0; - doretry = 1; + if (prepost || somewakeup) { + /* + * if the select of log, then we can wakeup and + * discover some one else already read the data; + * go to select again if time permits + */ + prepost = 0; + somewakeup = 0; + doretry = 1; } } if (uap->tv) { - uint64_t now; + uint64_t now; clock_get_uptime(&now); - if (now >= sel->abstime) + if (now >= seldata->abstime) { goto done; + } } if (doretry) { @@ -1135,59 +1490,72 @@ retry: * To effect a poll, the timeout argument should be * non-nil, pointing to a zero-valued timeval structure. */ - if (uap->tv && sel->abstime == 0) { + if (uap->tv && seldata->abstime == 0) { goto done; } /* No spurious wakeups due to colls,no need to check for them */ - if ((sel_pass == SEL_SECONDPASS) || ((p->p_flag & P_SELECT) == 0)) { + if ((sel_pass == SEL_SECONDPASS) || ((p->p_flag & P_SELECT) == 0)) { sel_pass = SEL_FIRSTPASS; goto retry; } - p->p_flag &= ~P_SELECT; + OSBitAndAtomic(~((uint32_t)P_SELECT), &p->p_flag); /* if the select is just for timeout skip check */ - if (sel->count &&(sel_pass == SEL_SECONDPASS)) + if (seldata->count && (sel_pass == SEL_SECONDPASS)) { panic("selprocess: 2nd pass assertwaiting"); + } - /* Wait Queue Subordinate has waitqueue as first element */ - wait_result = wait_queue_assert_wait((wait_queue_t)sel->wqset, - &selwait, THREAD_ABORTSAFE, sel->abstime); + /* waitq_set has waitqueue as first element */ + wait_result = waitq_assert_wait64_leeway((struct waitq *)uth->uu_wqset, + NO_EVENT64, THREAD_ABORTSAFE, + TIMEOUT_URGENCY_USER_NORMAL, + seldata->abstime, + TIMEOUT_NO_LEEWAY); if (wait_result != THREAD_AWAKENED) { /* there are no preposted events */ error = tsleep1(NULL, PSOCK | PCATCH, - "select", 0, selcontinue); - } else { + "select", 0, selcontinue); + } else { prepost = 1; error = 0; } - sel_pass = SEL_SECONDPASS; if (error == 0) { - if (!prepost) - somewakeup =1; + sel_pass = SEL_SECONDPASS; + if (!prepost) { + somewakeup = 1; + } goto retry; } done: if (unwind) { - wait_subqueue_unlink_all(sel->wqset); - seldrop(p, sel->ibits, uap->nd); + seldrop(p, sel->ibits, uap->nd, seldata->count); + waitq_set_deinit(uth->uu_wqset); + /* + * zero out the waitq pointer array to avoid use-after free + * errors in the selcount error path (seldrop_locked) if/when + * the thread re-calls select(). + */ + bzero((void *)uth->uu_wqset, uth->uu_wqstate_sz); } - p->p_flag &= ~P_SELECT; + OSBitAndAtomic(~((uint32_t)P_SELECT), &p->p_flag); /* select is not restarted after signals... */ - if (error == ERESTART) + if (error == ERESTART) { error = EINTR; - if (error == EWOULDBLOCK) + } + if (error == EWOULDBLOCK) { error = 0; + } nw = howmany(uap->nd, NFDBITS); ni = nw * sizeof(fd_mask); -#define putbits(name, x) \ +#define putbits(name, x) \ do { \ - if (uap->name && (error2 = \ - copyout((caddr_t)&sel->obits[(x) * nw], uap->name, ni))) \ - error = error2; \ + if (uap->name && (error2 = \ + copyout((caddr_t)&sel->obits[(x) * nw], uap->name, ni))) \ + error = error2; \ } while (0) if (error == 0) { @@ -1198,108 +1566,285 @@ done: putbits(ex, 2); #undef putbits } - return(error); + + if (error != EINTR && sel_pass == SEL_SECONDPASS && uth->uu_flag & UT_SAS_OLDMASK) { + /* restore signal mask - continuation case */ + uth->uu_sigmask = uth->uu_oldmask; + uth->uu_oldmask = 0; + uth->uu_flag &= ~UT_SAS_OLDMASK; + } + + return error; } -static int -selscan(p, sel, nfd, retval, sel_pass, wqsub) - struct proc *p; - struct _select *sel; - int nfd; - register_t *retval; - int sel_pass; - wait_queue_sub_t wqsub; -{ - register struct filedesc *fdp = p->p_fd; - register int msk, i, j, fd; - register u_int32_t bits; - struct fileproc *fp; - int n = 0; - int nc = 0; - static int flag[3] = { FREAD, FWRITE, 0 }; - u_int32_t *iptr, *optr; - u_int nw; - u_int32_t *ibits, *obits; - char * wql; - char * wql_ptr; + +/** + * remove the fileproc's underlying waitq from the supplied waitq set; + * clear FP_INSELECT when appropriate + * + * Parameters: + * fp File proc that is potentially currently in select + * wqset Waitq set to which the fileproc may belong + * (usually this is the thread's private waitq set) + * Conditions: + * proc_fdlock is held + */ +static void +selunlinkfp(struct fileproc *fp, uint64_t wqp_id, struct waitq_set *wqset) +{ + int valid_set = waitq_set_is_valid(wqset); + int valid_q = !!wqp_id; /* - * Problems when reboot; due to MacOSX signal probs - * in Beaker1C ; verify that the p->p_fd is valid + * This could be called (from selcount error path) before we setup + * the thread's wqset. Check the wqset passed in, and only unlink if + * the set is valid. + */ + + /* unlink the underlying waitq from the input set (thread waitq set) */ + if (valid_q && valid_set) { + waitq_unlink_by_prepost_id(wqp_id, wqset); + } + + /* allow passing a invalid fp for seldrop unwind */ + if (!(fp->fp_flags & (FP_INSELECT | FP_SELCONFLICT))) { + return; + } + + /* + * We can always remove the conflict queue from our thread's set: this + * will not affect other threads that potentially need to be awoken on + * the conflict queue during a fileproc_drain - those sets will still + * be linked with the global conflict queue, and the last waiter + * on the fp clears the CONFLICT marker. + */ + if (valid_set && (fp->fp_flags & FP_SELCONFLICT)) { + waitq_unlink(&select_conflict_queue, wqset); + } + + /* jca: TODO: + * This isn't quite right - we don't actually know if this + * fileproc is in another select or not! Here we just assume + * that if we were the first thread to select on the FD, then + * we'll be the one to clear this flag... + */ + if (valid_set && fp->fp_wset == (void *)wqset) { + fp->fp_flags &= ~FP_INSELECT; + fp->fp_wset = NULL; + } +} + +/** + * connect a fileproc to the given wqset, potentially bridging to a waitq + * pointed to indirectly by wq_data + * + * Parameters: + * fp File proc potentially currently in select + * wq_data Pointer to a pointer to a waitq (could be NULL) + * wqset Waitq set to which the fileproc should now belong + * (usually this is the thread's private waitq set) + * + * Conditions: + * proc_fdlock is held + */ +static uint64_t +sellinkfp(struct fileproc *fp, void **wq_data, struct waitq_set *wqset) +{ + struct waitq *f_wq = NULL; + + if ((fp->fp_flags & FP_INSELECT) != FP_INSELECT) { + if (wq_data) { + panic("non-null data:%p on fp:%p not in select?!" + "(wqset:%p)", wq_data, fp, wqset); + } + return 0; + } + + if ((fp->fp_flags & FP_SELCONFLICT) == FP_SELCONFLICT) { + waitq_link(&select_conflict_queue, wqset, WAITQ_SHOULD_LOCK, NULL); + } + + /* + * The wq_data parameter has potentially been set by selrecord called + * from a subsystems fo_select() function. If the subsystem does not + * call selrecord, then wq_data will be NULL + * + * Use memcpy to get the value into a proper pointer because + * wq_data most likely points to a stack variable that could be + * unaligned on 32-bit systems. + */ + if (wq_data) { + memcpy(&f_wq, wq_data, sizeof(f_wq)); + if (!waitq_is_valid(f_wq)) { + f_wq = NULL; + } + } + + /* record the first thread's wqset in the fileproc structure */ + if (!fp->fp_wset) { + fp->fp_wset = (void *)wqset; + } + + /* handles NULL f_wq */ + return waitq_get_prepost_id(f_wq); +} + + +/* + * selscan + * + * Parameters: p Process performing the select + * sel The per-thread select context structure + * nfd The number of file descriptors to scan + * retval The per thread system call return area + * sel_pass Which pass this is; allowed values are + * SEL_FIRSTPASS and SEL_SECONDPASS + * wqset The per thread wait queue set + * + * Returns: 0 Success + * EIO Invalid p->p_fd field XXX Obsolete? + * EBADF One of the files in the bit vector is + * invalid. + */ +static int +selscan(struct proc *p, struct _select *sel, struct _select_data * seldata, + int nfd, int32_t *retval, int sel_pass, struct waitq_set *wqset) +{ + struct filedesc *fdp = p->p_fd; + int msk, i, j, fd; + u_int32_t bits; + struct fileproc *fp; + int n = 0; /* count of bits */ + int nc = 0; /* bit vector offset (nc'th bit) */ + static int flag[3] = { FREAD, FWRITE, 0 }; + u_int32_t *iptr, *optr; + u_int nw; + u_int32_t *ibits, *obits; + uint64_t reserved_link, *rl_ptr = NULL; + int count; + struct vfs_context context = *vfs_context_current(); + + /* + * Problems when reboot; due to MacOSX signal probs + * in Beaker1C ; verify that the p->p_fd is valid */ if (fdp == NULL) { - *retval=0; - return(EIO); + *retval = 0; + return EIO; } ibits = sel->ibits; obits = sel->obits; - wql = sel->wql; nw = howmany(nfd, NFDBITS); - nc = 0; - proc_fdlock(p); + count = seldata->count; - if (sel->count) { - for (msk = 0; msk < 3; msk++) { - iptr = (u_int32_t *)&ibits[msk * nw]; - optr = (u_int32_t *)&obits[msk * nw]; + nc = 0; + if (!count) { + *retval = 0; + return 0; + } - for (i = 0; i < nfd; i += NFDBITS) { - bits = iptr[i/NFDBITS]; + proc_fdlock(p); + for (msk = 0; msk < 3; msk++) { + iptr = (u_int32_t *)&ibits[msk * nw]; + optr = (u_int32_t *)&obits[msk * nw]; - while ((j = ffs(bits)) && (fd = i + --j) < nfd) { - bits &= ~(1 << j); - fp = fdp->fd_ofiles[fd]; + for (i = 0; i < nfd; i += NFDBITS) { + bits = iptr[i / NFDBITS]; - if (fp == NULL || - (fdp->fd_ofileflags[fd] & UF_RESERVED)) { - proc_fdunlock(p); - return(EBADF); - } - if (sel_pass == SEL_SECONDPASS) { - wql_ptr = (char *)0; - fp->f_flags &= ~FP_INSELECT; - fp->f_waddr = (void *)0; + while ((j = ffs(bits)) && (fd = i + --j) < nfd) { + bits &= ~(1U << j); + + fp = fp_get_noref_locked(p, fd); + if (fp == NULL) { + /* + * If we abort because of a bad + * fd, let the caller unwind... + */ + proc_fdunlock(p); + return EBADF; + } + if (sel_pass == SEL_SECONDPASS) { + reserved_link = 0; + rl_ptr = NULL; + selunlinkfp(fp, seldata->wqp[nc], wqset); + } else { + reserved_link = waitq_link_reserve((struct waitq *)wqset); + rl_ptr = &reserved_link; + if (fp->fp_flags & FP_INSELECT) { + /* someone is already in select on this fp */ + fp->fp_flags |= FP_SELCONFLICT; } else { - wql_ptr = (wql + nc * SIZEOF_WAITQUEUE_LINK); - fp->f_flags |= FP_INSELECT; - fp->f_waddr = (void *)wqsub; + fp->fp_flags |= FP_INSELECT; } - if (fp->f_ops && fo_select(fp, flag[msk], wql_ptr, p)) { - optr[fd/NFDBITS] |= (1 << (fd % NFDBITS)); - n++; + + waitq_set_lazy_init_link(wqset); + } + + context.vc_ucred = fp->f_cred; + + /* + * stash this value b/c fo_select may replace + * reserved_link with a pointer to a waitq object + */ + uint64_t rsvd = reserved_link; + + /* The select; set the bit, if true */ + if (fp->f_ops && fp->f_type + && fo_select(fp, flag[msk], rl_ptr, &context)) { + optr[fd / NFDBITS] |= (1U << (fd % NFDBITS)); + n++; + } + if (sel_pass == SEL_FIRSTPASS) { + waitq_link_release(rsvd); + /* + * If the fp's supporting selinfo structure was linked + * to this thread's waitq set, then 'reserved_link' + * will have been updated by selrecord to be a pointer + * to the selinfo's waitq. + */ + if (reserved_link == rsvd) { + rl_ptr = NULL; /* fo_select never called selrecord() */ } - nc++; + /* + * Hook up the thread's waitq set either to + * the fileproc structure, or to the global + * conflict queue: but only on the first + * select pass. + */ + seldata->wqp[nc] = sellinkfp(fp, (void **)rl_ptr, wqset); } + nc++; } } } proc_fdunlock(p); + *retval = n; - return (0); + return 0; } -static int poll_callback(struct kqueue *, struct kevent *, void *); +static int poll_callback(struct kevent_qos_s *, kevent_ctx_t); + +int +poll(struct proc *p, struct poll_args *uap, int32_t *retval) +{ + __pthread_testcancel(1); + return poll_nocancel(p, (struct poll_nocancel_args *)uap, retval); +} -struct poll_continue_args { - user_addr_t pca_fds; - u_int pca_nfds; - u_int pca_rfds; -}; int -poll(struct proc *p, struct poll_args *uap, register_t *retval) +poll_nocancel(struct proc *p, struct poll_nocancel_args *uap, int32_t *retval) { - struct poll_continue_args *cont; - struct pollfd *fds; - struct kqueue *kq; - struct timeval atv; + struct pollfd *fds = NULL; + struct kqueue *kq = NULL; int ncoll, error = 0; u_int nfds = uap->nfds; u_int rfds = 0; - u_int i; - size_t ni; + rlim_t nofile = proc_limitgetcur(p, RLIMIT_NOFILE, TRUE); + size_t ni = nfds * sizeof(struct pollfd); /* * This is kinda bogus. We have fd limits, but that is not @@ -1309,49 +1854,34 @@ poll(struct proc *p, struct poll_args *uap, register_t *retval) * safe, but not overly restrictive. */ if (nfds > OPEN_MAX || - (nfds > p->p_rlimit[RLIMIT_NOFILE].rlim_cur && nfds > FD_SETSIZE)) - return (EINVAL); + (nfds > nofile && (proc_suser(p) || nfds > FD_SETSIZE))) { + return EINVAL; + } kq = kqueue_alloc(p); - if (kq == NULL) - return (EAGAIN); - - ni = nfds * sizeof(struct pollfd) + sizeof(struct poll_continue_args); - MALLOC(cont, struct poll_continue_args *, ni, M_TEMP, M_WAITOK); - if (NULL == cont) { - error = EAGAIN; - goto out; + if (kq == NULL) { + return EAGAIN; } - - fds = (struct pollfd *)&cont[1]; - error = copyin(uap->fds, fds, nfds * sizeof(struct pollfd)); - if (error) - goto out; - if (uap->timeout != -1) { - struct timeval rtv; + if (nfds) { + fds = kheap_alloc(KHEAP_TEMP, ni, Z_WAITOK); + if (NULL == fds) { + error = EAGAIN; + goto out; + } - atv.tv_sec = uap->timeout / 1000; - atv.tv_usec = (uap->timeout % 1000) * 1000; - if (itimerfix(&atv)) { - error = EINVAL; + error = copyin(uap->fds, fds, nfds * sizeof(struct pollfd)); + if (error) { goto out; } - getmicrouptime(&rtv); - timevaladd(&atv, &rtv); - } else { - atv.tv_sec = 0; - atv.tv_usec = 0; } /* JMM - all this P_SELECT stuff is bogus */ ncoll = nselcoll; - p->p_flag |= P_SELECT; - - for (i = 0; i < nfds; i++) { + OSBitOrAtomic(P_SELECT, &p->p_flag); + for (u_int i = 0; i < nfds; i++) { short events = fds[i].events; - struct kevent kev; - int kerror = 0; + __assert_only int rc; /* per spec, ignore fd values below zero */ if (fds[i].fd < 0) { @@ -1360,156 +1890,218 @@ poll(struct proc *p, struct poll_args *uap, register_t *retval) } /* convert the poll event into a kqueue kevent */ - kev.ident = fds[i].fd; - kev.flags = EV_ADD | EV_ONESHOT | EV_POLL; - kev.fflags = NOTE_LOWAT; - kev.data = 1; /* efficiency be damned: any data should trigger */ - kev.udata = CAST_USER_ADDR_T(&fds[i]); + struct kevent_qos_s kev = { + .ident = fds[i].fd, + .flags = EV_ADD | EV_ONESHOT | EV_POLL, + .udata = CAST_USER_ADDR_T(&fds[i]) + }; /* Handle input events */ - if (events & ( POLLIN | POLLRDNORM | POLLPRI | POLLRDBAND )) { + if (events & (POLLIN | POLLRDNORM | POLLPRI | POLLRDBAND | POLLHUP)) { kev.filter = EVFILT_READ; - if (!(events & ( POLLIN | POLLRDNORM ))) + if (events & (POLLPRI | POLLRDBAND)) { kev.flags |= EV_OOBAND; - kerror = kevent_register(kq, &kev, p); + } + rc = kevent_register(kq, &kev, NULL); + assert((rc & FILTER_REGISTER_WAIT) == 0); } /* Handle output events */ - if (kerror == 0 && - events & ( POLLOUT | POLLWRNORM | POLLWRBAND )) { + if ((kev.flags & EV_ERROR) == 0 && + (events & (POLLOUT | POLLWRNORM | POLLWRBAND))) { kev.filter = EVFILT_WRITE; - kerror = kevent_register(kq, &kev, p); + rc = kevent_register(kq, &kev, NULL); + assert((rc & FILTER_REGISTER_WAIT) == 0); } /* Handle BSD extension vnode events */ - if (kerror == 0 && - events & ( POLLEXTEND | POLLATTRIB | POLLNLINK | POLLWRITE )) { + if ((kev.flags & EV_ERROR) == 0 && + (events & (POLLEXTEND | POLLATTRIB | POLLNLINK | POLLWRITE))) { kev.filter = EVFILT_VNODE; kev.fflags = 0; - if (events & POLLEXTEND) + if (events & POLLEXTEND) { kev.fflags |= NOTE_EXTEND; - if (events & POLLATTRIB) + } + if (events & POLLATTRIB) { kev.fflags |= NOTE_ATTRIB; - if (events & POLLNLINK) + } + if (events & POLLNLINK) { kev.fflags |= NOTE_LINK; - if (events & POLLWRITE) + } + if (events & POLLWRITE) { kev.fflags |= NOTE_WRITE; - kerror = kevent_register(kq, &kev, p); + } + rc = kevent_register(kq, &kev, NULL); + assert((rc & FILTER_REGISTER_WAIT) == 0); } - if (kerror != 0) { + if (kev.flags & EV_ERROR) { fds[i].revents = POLLNVAL; rfds++; - } else + } else { fds[i].revents = 0; + } } - /* Did we have any trouble registering? */ - if (rfds > 0) + /* + * Did we have any trouble registering? + * If user space passed 0 FDs, then respect any timeout value passed. + * This is an extremely inefficient sleep. If user space passed one or + * more FDs, and we had trouble registering _all_ of them, then bail + * out. If a subset of the provided FDs failed to register, then we + * will still call the kqueue_scan function. + */ + if (nfds && (rfds == nfds)) { goto done; + } /* scan for, and possibly wait for, the kevents to trigger */ - cont->pca_fds = uap->fds; - cont->pca_nfds = nfds; - cont->pca_rfds = rfds; - error = kevent_scan(kq, poll_callback, NULL, cont, &atv, p); - rfds = cont->pca_rfds; - - done: - p->p_flag &= ~P_SELECT; + kevent_ctx_t kectx = kevent_get_context(current_thread()); + *kectx = (struct kevent_ctx_s){ + .kec_process_noutputs = rfds, + .kec_process_flags = KEVENT_FLAG_POLL, + .kec_deadline = 0, /* wait forever */ + }; + + /* + * If any events have trouble registering, an event has fired and we + * shouldn't wait for events in kqueue_scan. + */ + if (rfds) { + kectx->kec_process_flags |= KEVENT_FLAG_IMMEDIATE; + } else if (uap->timeout != -1) { + clock_interval_to_deadline(uap->timeout, NSEC_PER_MSEC, + &kectx->kec_deadline); + } + + error = kqueue_scan(kq, kectx->kec_process_flags, kectx, poll_callback); + rfds = kectx->kec_process_noutputs; + +done: + OSBitAndAtomic(~((uint32_t)P_SELECT), &p->p_flag); /* poll is not restarted after signals... */ - if (error == ERESTART) + if (error == ERESTART) { error = EINTR; - if (error == EWOULDBLOCK) - error = 0; + } if (error == 0) { error = copyout(fds, uap->fds, nfds * sizeof(struct pollfd)); *retval = rfds; } - out: - if (NULL != cont) - FREE(cont, M_TEMP); +out: + kheap_free(KHEAP_TEMP, fds, ni); - kqueue_dealloc(kq, p); - return (error); + kqueue_dealloc(kq); + return error; } static int -poll_callback(__unused struct kqueue *kq, struct kevent *kevp, void *data) +poll_callback(struct kevent_qos_s *kevp, kevent_ctx_t kectx) { - struct poll_continue_args *cont = (struct poll_continue_args *)data; struct pollfd *fds = CAST_DOWN(struct pollfd *, kevp->udata); - short mask; + short prev_revents = fds->revents; + short mask = 0; /* convert the results back into revents */ - if (kevp->flags & EV_EOF) + if (kevp->flags & EV_EOF) { fds->revents |= POLLHUP; - if (kevp->flags & EV_ERROR) + } + if (kevp->flags & EV_ERROR) { fds->revents |= POLLERR; - cont->pca_rfds++; + } switch (kevp->filter) { case EVFILT_READ: - if (fds->revents & POLLHUP) - mask = (POLLIN | POLLRDNORM | POLLPRI | POLLRDBAND ); - else { - mask = 0; - if (kevp->data != 0) - mask |= (POLLIN | POLLRDNORM ); - if (kevp->flags & EV_OOBAND) - mask |= ( POLLPRI | POLLRDBAND ); + if (fds->revents & POLLHUP) { + mask = (POLLIN | POLLRDNORM | POLLPRI | POLLRDBAND); + } else { + mask = (POLLIN | POLLRDNORM); + if (kevp->flags & EV_OOBAND) { + mask |= (POLLPRI | POLLRDBAND); + } } fds->revents |= (fds->events & mask); break; case EVFILT_WRITE: - if (!(fds->revents & POLLHUP)) - fds->revents |= (fds->events & ( POLLOUT | POLLWRNORM | POLLWRBAND )); + if (!(fds->revents & POLLHUP)) { + fds->revents |= (fds->events & (POLLOUT | POLLWRNORM | POLLWRBAND)); + } break; - case EVFILT_PROC: - if (kevp->fflags & NOTE_EXTEND) + case EVFILT_VNODE: + if (kevp->fflags & NOTE_EXTEND) { fds->revents |= (fds->events & POLLEXTEND); - if (kevp->fflags & NOTE_ATTRIB) + } + if (kevp->fflags & NOTE_ATTRIB) { fds->revents |= (fds->events & POLLATTRIB); - if (kevp->fflags & NOTE_LINK) + } + if (kevp->fflags & NOTE_LINK) { fds->revents |= (fds->events & POLLNLINK); - if (kevp->fflags & NOTE_WRITE) + } + if (kevp->fflags & NOTE_WRITE) { fds->revents |= (fds->events & POLLWRITE); + } break; } + + if (fds->revents != 0 && prev_revents == 0) { + kectx->kec_process_noutputs++; + } + return 0; } - + int seltrue(__unused dev_t dev, __unused int flag, __unused struct proc *p) { - - return (1); + return 1; } +/* + * selcount + * + * Count the number of bits set in the input bit vector, and establish an + * outstanding fp->fp_iocount for each of the descriptors which will be in + * use in the select operation. + * + * Parameters: p The process doing the select + * ibits The input bit vector + * nfd The number of fd's in the vector + * countp Pointer to where to store the bit count + * + * Returns: 0 Success + * EIO Bad per process open file table + * EBADF One of the bits in the input bit vector + * references an invalid fd + * + * Implicit: *countp (modified) Count of fd's + * + * Notes: This function is the first pass under the proc_fdlock() that + * permits us to recognize invalid descriptors in the bit vector; + * the may, however, not remain valid through the drop and + * later reacquisition of the proc_fdlock(). + */ static int -selcount(struct proc *p, u_int32_t *ibits, __unused u_int32_t *obits, - int nfd, int *count) +selcount(struct proc *p, u_int32_t *ibits, int nfd, int *countp) { - register struct filedesc *fdp = p->p_fd; - register int msk, i, j, fd; - register u_int32_t bits; + struct filedesc *fdp = p->p_fd; + int msk, i, j, fd; + u_int32_t bits; struct fileproc *fp; int n = 0; u_int32_t *iptr; u_int nw; - int error=0; - int dropcount; + int error = 0; + int need_wakeup = 0; /* * Problems when reboot; due to MacOSX signal probs * in Beaker1C ; verify that the p->p_fd is valid */ if (fdp == NULL) { - *count=0; - return(EIO); + *countp = 0; + return EIO; } nw = howmany(nfd, NFDBITS); @@ -1517,156 +2109,228 @@ selcount(struct proc *p, u_int32_t *ibits, __unused u_int32_t *obits, for (msk = 0; msk < 3; msk++) { iptr = (u_int32_t *)&ibits[msk * nw]; for (i = 0; i < nfd; i += NFDBITS) { - bits = iptr[i/NFDBITS]; + bits = iptr[i / NFDBITS]; while ((j = ffs(bits)) && (fd = i + --j) < nfd) { - bits &= ~(1 << j); - fp = fdp->fd_ofiles[fd]; - if (fp == NULL || - (fdp->fd_ofileflags[fd] & UF_RESERVED)) { - *count=0; - error = EBADF; - goto bad; + bits &= ~(1U << j); + + fp = fp_get_noref_locked(p, fd); + if (fp == NULL) { + *countp = 0; + error = EBADF; + goto bad; } - fp->f_iocount++; + os_ref_retain_locked(&fp->fp_iocount); n++; } } } proc_fdunlock(p); - *count = n; - return (0); + *countp = n; + return 0; + bad: - dropcount = 0; - - if (n== 0) + if (n == 0) { goto out; - /* undo the iocounts */ - for (msk = 0; msk < 3; msk++) { - iptr = (u_int32_t *)&ibits[msk * nw]; - for (i = 0; i < nfd; i += NFDBITS) { - bits = iptr[i/NFDBITS]; - while ((j = ffs(bits)) && (fd = i + --j) < nfd) { - bits &= ~(1 << j); - fp = fdp->fd_ofiles[fd]; - if (dropcount >= n) - goto out; - fp->f_iocount--; - - if (p->p_fpdrainwait && fp->f_iocount == 0) { - p->p_fpdrainwait = 0; - wakeup(&p->p_fpdrainwait); - } - dropcount++; - } - } } + /* Ignore error return; it's already EBADF */ + (void)seldrop_locked(p, ibits, nfd, n, &need_wakeup); + out: proc_fdunlock(p); - return(error); + if (need_wakeup) { + wakeup(&p->p_fpdrainwait); + } + return error; } + +/* + * seldrop_locked + * + * Drop outstanding wait queue references set up during selscan(); drop the + * outstanding per fileproc fp_iocount picked up during the selcount(). + * + * Parameters: p Process performing the select + * ibits Input bit bector of fd's + * nfd Number of fd's + * lim Limit to number of vector entries to + * consider, or -1 for "all" + * inselect True if + * need_wakeup Pointer to flag to set to do a wakeup + * if f_iocont on any descriptor goes to 0 + * + * Returns: 0 Success + * EBADF One or more fds in the bit vector + * were invalid, but the rest + * were successfully dropped + * + * Notes: An fd make become bad while the proc_fdlock() is not held, + * if a multithreaded application closes the fd out from under + * the in progress select. In this case, we still have to + * clean up after the set up on the remaining fds. + */ static int -seldrop(p, ibits, nfd) - struct proc *p; - u_int32_t *ibits; - int nfd; +seldrop_locked(struct proc *p, u_int32_t *ibits, int nfd, int lim, int *need_wakeup) { - register struct filedesc *fdp = p->p_fd; - register int msk, i, j, fd; - register u_int32_t bits; + struct filedesc *fdp = p->p_fd; + int msk, i, j, nc, fd; + u_int32_t bits; struct fileproc *fp; - int n = 0; u_int32_t *iptr; u_int nw; + int error = 0; + uthread_t uth = get_bsdthread_info(current_thread()); + struct _select_data *seldata; + + *need_wakeup = 0; /* * Problems when reboot; due to MacOSX signal probs * in Beaker1C ; verify that the p->p_fd is valid */ if (fdp == NULL) { - return(EIO); + return EIO; } nw = howmany(nfd, NFDBITS); + seldata = &uth->uu_save.uus_select_data; - - proc_fdlock(p); + nc = 0; for (msk = 0; msk < 3; msk++) { iptr = (u_int32_t *)&ibits[msk * nw]; for (i = 0; i < nfd; i += NFDBITS) { - bits = iptr[i/NFDBITS]; + bits = iptr[i / NFDBITS]; while ((j = ffs(bits)) && (fd = i + --j) < nfd) { - bits &= ~(1 << j); - fp = fdp->fd_ofiles[fd]; - if (fp == NULL -#if 0 - /* if you are here then it is being closed */ - || (fdp->fd_ofileflags[fd] & UF_RESERVED) -#endif - ) { - proc_fdunlock(p); - return(EBADF); + bits &= ~(1U << j); + /* + * If we've already dropped as many as were + * counted/scanned, then we are done. + */ + if (nc >= lim) { + goto done; } - n++; - fp->f_iocount--; - fp->f_flags &= ~FP_INSELECT; - if (p->p_fpdrainwait && fp->f_iocount == 0) { - p->p_fpdrainwait = 0; - wakeup(&p->p_fpdrainwait); + /* + * We took an I/O reference in selcount, + * so the fp can't possibly be NULL. + */ + fp = fp_get_noref_locked_with_iocount(p, fd); + selunlinkfp(fp, + seldata->wqp ? seldata->wqp[nc] : 0, + uth->uu_wqset); + + nc++; + + const os_ref_count_t refc = os_ref_release_locked(&fp->fp_iocount); + if (0 == refc) { + panic("fp_iocount overdecrement!"); + } + + if (1 == refc) { + /* + * The last iocount is responsible for clearing + * selconfict flag - even if we didn't set it - + * and is also responsible for waking up anyone + * waiting on iocounts to drain. + */ + if (fp->fp_flags & FP_SELCONFLICT) { + fp->fp_flags &= ~FP_SELCONFLICT; + } + if (p->p_fpdrainwait) { + p->p_fpdrainwait = 0; + *need_wakeup = 1; + } } } } } +done: + return error; +} + + +static int +seldrop(struct proc *p, u_int32_t *ibits, int nfd, int lim) +{ + int error; + int need_wakeup = 0; + + proc_fdlock(p); + error = seldrop_locked(p, ibits, nfd, lim, &need_wakeup); proc_fdunlock(p); - return (0); + if (need_wakeup) { + wakeup(&p->p_fpdrainwait); + } + return error; } /* * Record a select request. */ void -selrecord(__unused struct proc *selector, struct selinfo *sip, void * p_wql) +selrecord(__unused struct proc *selector, struct selinfo *sip, void *s_data) { - thread_t cur_act = current_thread(); + thread_t cur_act = current_thread(); struct uthread * ut = get_bsdthread_info(cur_act); + /* on input, s_data points to the 64-bit ID of a reserved link object */ + uint64_t *reserved_link = (uint64_t *)s_data; /* need to look at collisions */ - if ((p_wql == (void *)0) && ((sip->si_flags & SI_INITED) == 0)) { - return; - } - /*do not record if this is second pass of select */ - if((p_wql == (void *)0)) { + if (!s_data) { return; } if ((sip->si_flags & SI_INITED) == 0) { - wait_queue_init(&sip->si_wait_queue, SYNC_POLICY_FIFO); + waitq_init(&sip->si_waitq, SYNC_POLICY_FIFO); sip->si_flags |= SI_INITED; sip->si_flags &= ~SI_CLEAR; } if (sip->si_flags & SI_RECORDED) { sip->si_flags |= SI_COLL; - } else + } else { sip->si_flags &= ~SI_COLL; + } sip->si_flags |= SI_RECORDED; - if (!wait_queue_member(&sip->si_wait_queue, ut->uu_select.wqset)) - wait_queue_link_noalloc(&sip->si_wait_queue, ut->uu_select.wqset, - (wait_queue_link_t)p_wql); + /* note: this checks for pre-existing linkage */ + waitq_link(&sip->si_waitq, ut->uu_wqset, + WAITQ_SHOULD_LOCK, reserved_link); + + /* + * Always consume the reserved link. + * We can always call waitq_link_release() safely because if + * waitq_link is successful, it consumes the link and resets the + * value to 0, in which case our call to release becomes a no-op. + * If waitq_link fails, then the following release call will actually + * release the reserved link object. + */ + waitq_link_release(*reserved_link); + *reserved_link = 0; + + /* + * Use the s_data pointer as an output parameter as well + * This avoids changing the prototype for this function which is + * used by many kexts. We need to surface the waitq object + * associated with the selinfo we just added to the thread's select + * set. New waitq sets do not have back-pointers to set members, so + * the only way to clear out set linkage objects is to go from the + * waitq to the set. We use a memcpy because s_data could be + * pointing to an unaligned value on the stack + * (especially on 32-bit systems) + */ + void *wqptr = (void *)&sip->si_waitq; + memcpy((void *)s_data, (void *)&wqptr, sizeof(void *)); return; } void -selwakeup(sip) - register struct selinfo *sip; +selwakeup(struct selinfo *sip) { - if ((sip->si_flags & SI_INITED) == 0) { return; } @@ -1681,785 +2345,1247 @@ selwakeup(sip) } if (sip->si_flags & SI_RECORDED) { - wait_queue_wakeup_all(&sip->si_wait_queue, &selwait, THREAD_AWAKENED); + waitq_wakeup64_all(&sip->si_waitq, NO_EVENT64, + THREAD_AWAKENED, WAITQ_ALL_PRIORITIES); sip->si_flags &= ~SI_RECORDED; } - } -void -selthreadclear(sip) - register struct selinfo *sip; +void +selthreadclear(struct selinfo *sip) { + struct waitq *wq; if ((sip->si_flags & SI_INITED) == 0) { return; } if (sip->si_flags & SI_RECORDED) { - selwakeup(sip); - sip->si_flags &= ~(SI_RECORDED | SI_COLL); + selwakeup(sip); + sip->si_flags &= ~(SI_RECORDED | SI_COLL); } sip->si_flags |= SI_CLEAR; - wait_queue_unlinkall_nofree(&sip->si_wait_queue); -} - - - + sip->si_flags &= ~SI_INITED; -#define DBG_EVENT 0x10 + wq = &sip->si_waitq; -#define DBG_POST 0x10 -#define DBG_WATCH 0x11 -#define DBG_WAIT 0x12 -#define DBG_MOD 0x13 -#define DBG_EWAKEUP 0x14 -#define DBG_ENQUEUE 0x15 -#define DBG_DEQUEUE 0x16 - -#define DBG_MISC_POST MISCDBG_CODE(DBG_EVENT,DBG_POST) -#define DBG_MISC_WATCH MISCDBG_CODE(DBG_EVENT,DBG_WATCH) -#define DBG_MISC_WAIT MISCDBG_CODE(DBG_EVENT,DBG_WAIT) -#define DBG_MISC_MOD MISCDBG_CODE(DBG_EVENT,DBG_MOD) -#define DBG_MISC_EWAKEUP MISCDBG_CODE(DBG_EVENT,DBG_EWAKEUP) -#define DBG_MISC_ENQUEUE MISCDBG_CODE(DBG_EVENT,DBG_ENQUEUE) -#define DBG_MISC_DEQUEUE MISCDBG_CODE(DBG_EVENT,DBG_DEQUEUE) - - -#define EVPROCDEQUE(p, evq) do { \ - proc_lock(p); \ - if (evq->ee_flags & EV_QUEUED) { \ - TAILQ_REMOVE(&p->p_evlist, evq, ee_plist); \ - evq->ee_flags &= ~EV_QUEUED; \ - } \ - proc_unlock(p); \ -} while (0); + /* + * Higher level logic may have a handle on this waitq's prepost ID, + * but that's OK because the waitq_deinit will remove/invalidate the + * prepost object (as well as mark the waitq invalid). This de-couples + * us from any callers that may have a handle to this waitq via the + * prepost ID. + */ + waitq_deinit(wq); +} /* - * called upon socket close. deque and free all events for - * the socket... socket must be locked by caller. + * gethostuuid + * + * Description: Get the host UUID from IOKit and return it to user space. + * + * Parameters: uuid_buf Pointer to buffer to receive UUID + * timeout Timespec for timout + * + * Returns: 0 Success + * EWOULDBLOCK Timeout is too short + * copyout:EFAULT Bad user buffer + * mac_system_check_info:EPERM Client not allowed to perform this operation + * + * Notes: A timeout seems redundant, since if it's tolerable to not + * have a system UUID in hand, then why ask for one? */ -void -evsofree(struct socket *sp) +int +gethostuuid(struct proc *p, struct gethostuuid_args *uap, __unused int32_t *retval) { - struct eventqelt *evq, *next; - proc_t p; + kern_return_t kret; + int error; + mach_timespec_t mach_ts; /* for IOKit call */ + __darwin_uuid_t uuid_kern = {}; /* for IOKit call */ + + /* Check entitlement */ + if (!IOTaskHasEntitlement(current_task(), "com.apple.private.getprivatesysid")) { +#if !defined(XNU_TARGET_OS_OSX) +#if CONFIG_MACF + if ((error = mac_system_check_info(kauth_cred_get(), "hw.uuid")) != 0) { + /* EPERM invokes userspace upcall if present */ + return error; + } +#endif +#endif + } - if (sp == NULL) - return; + /* Convert the 32/64 bit timespec into a mach_timespec_t */ + if (proc_is64bit(p)) { + struct user64_timespec ts; + error = copyin(uap->timeoutp, &ts, sizeof(ts)); + if (error) { + return error; + } + mach_ts.tv_sec = (unsigned int)ts.tv_sec; + mach_ts.tv_nsec = (clock_res_t)ts.tv_nsec; + } else { + struct user32_timespec ts; + error = copyin(uap->timeoutp, &ts, sizeof(ts)); + if (error) { + return error; + } + mach_ts.tv_sec = ts.tv_sec; + mach_ts.tv_nsec = ts.tv_nsec; + } - for (evq = sp->so_evlist.tqh_first; evq != NULL; evq = next) { - next = evq->ee_slist.tqe_next; - p = evq->ee_proc; + /* Call IOKit with the stack buffer to get the UUID */ + kret = IOBSDGetPlatformUUID(uuid_kern, mach_ts); - if (evq->ee_flags & EV_QUEUED) { - EVPROCDEQUE(p, evq); - } - TAILQ_REMOVE(&sp->so_evlist, evq, ee_slist); // remove from socket q - FREE(evq, M_TEMP); + /* + * If we get it, copy out the data to the user buffer; note that a + * uuid_t is an array of characters, so this is size invariant for + * 32 vs. 64 bit. + */ + if (kret == KERN_SUCCESS) { + error = copyout(uuid_kern, uap->uuid_buf, sizeof(uuid_kern)); + } else { + error = EWOULDBLOCK; } -} + return error; +} /* - * called upon pipe close. deque and free all events for - * the pipe... pipe must be locked by caller + * ledger + * + * Description: Omnibus system call for ledger operations */ -void -evpipefree(struct pipe *cpipe) +int +ledger(struct proc *p, struct ledger_args *args, __unused int32_t *retval) { - struct eventqelt *evq, *next; - proc_t p; - - for (evq = cpipe->pipe_evlist.tqh_first; evq != NULL; evq = next) { - next = evq->ee_slist.tqe_next; - p = evq->ee_proc; - - EVPROCDEQUE(p, evq); +#if !CONFIG_MACF +#pragma unused(p) +#endif + int rval, pid, len, error; +#ifdef LEDGER_DEBUG + struct ledger_limit_args lla; +#endif + task_t task; + proc_t proc; - TAILQ_REMOVE(&cpipe->pipe_evlist, evq, ee_slist); // remove from pipe q - FREE(evq, M_TEMP); + /* Finish copying in the necessary args before taking the proc lock */ + error = 0; + len = 0; + if (args->cmd == LEDGER_ENTRY_INFO) { + error = copyin(args->arg3, (char *)&len, sizeof(len)); + } else if (args->cmd == LEDGER_TEMPLATE_INFO) { + error = copyin(args->arg2, (char *)&len, sizeof(len)); + } else if (args->cmd == LEDGER_LIMIT) +#ifdef LEDGER_DEBUG + { error = copyin(args->arg2, (char *)&lla, sizeof(lla));} +#else + { return EINVAL; } +#endif + else if ((args->cmd < 0) || (args->cmd > LEDGER_MAX_CMD)) { + return EINVAL; } -} + if (error) { + return error; + } + if (len < 0) { + return EINVAL; + } -/* - * enqueue this event if it's not already queued. wakeup - * the proc if we do queue this event to it... - * entered with proc lock held... we drop it before - * doing the wakeup and return in that state - */ -static void -evprocenque(struct eventqelt *evq) -{ - proc_t p; + rval = 0; + if (args->cmd != LEDGER_TEMPLATE_INFO) { + pid = (int)args->arg1; + proc = proc_find(pid); + if (proc == NULL) { + return ESRCH; + } - assert(evq); - p = evq->ee_proc; +#if CONFIG_MACF + error = mac_proc_check_ledger(p, proc, args->cmd); + if (error) { + proc_rele(proc); + return error; + } +#endif - KERNEL_DEBUG(DBG_MISC_ENQUEUE|DBG_FUNC_START, evq, evq->ee_flags, evq->ee_eventmask,0,0); + task = proc->task; + } - proc_lock(p); + switch (args->cmd) { +#ifdef LEDGER_DEBUG + case LEDGER_LIMIT: { + if (!kauth_cred_issuser(kauth_cred_get())) { + rval = EPERM; + } + rval = ledger_limit(task, &lla); + proc_rele(proc); + break; + } +#endif + case LEDGER_INFO: { + struct ledger_info info = {}; + + rval = ledger_info(task, &info); + proc_rele(proc); + if (rval == 0) { + rval = copyout(&info, args->arg2, + sizeof(info)); + } + break; + } - if (evq->ee_flags & EV_QUEUED) { - proc_unlock(p); + case LEDGER_ENTRY_INFO: { + void *buf; + int sz; - KERNEL_DEBUG(DBG_MISC_ENQUEUE|DBG_FUNC_END, 0,0,0,0,0); - return; + rval = ledger_get_task_entry_info_multiple(task, &buf, &len); + proc_rele(proc); + if ((rval == 0) && (len >= 0)) { + sz = len * sizeof(struct ledger_entry_info); + rval = copyout(buf, args->arg2, sz); + kheap_free(KHEAP_DATA_BUFFERS, buf, sz); + } + if (rval == 0) { + rval = copyout(&len, args->arg3, sizeof(len)); + } + break; } - evq->ee_flags |= EV_QUEUED; - TAILQ_INSERT_TAIL(&p->p_evlist, evq, ee_plist); + case LEDGER_TEMPLATE_INFO: { + void *buf; + int sz; - proc_unlock(p); + rval = ledger_template_info(&buf, &len); + if ((rval == 0) && (len >= 0)) { + sz = len * sizeof(struct ledger_template_info); + rval = copyout(buf, args->arg1, sz); + kheap_free(KHEAP_DATA_BUFFERS, buf, sz); + } + if (rval == 0) { + rval = copyout(&len, args->arg2, sizeof(len)); + } + break; + } - wakeup(&p->p_evlist); + default: + panic("ledger syscall logic error -- command type %d", args->cmd); + proc_rele(proc); + rval = EINVAL; + } - KERNEL_DEBUG(DBG_MISC_ENQUEUE|DBG_FUNC_END, 0,0,0,0,0); + return rval; } - -/* - * pipe lock must be taken by the caller +int +telemetry(__unused struct proc *p, struct telemetry_args *args, __unused int32_t *retval) +{ + int error = 0; + + switch (args->cmd) { +#if CONFIG_TELEMETRY + case TELEMETRY_CMD_TIMER_EVENT: + error = telemetry_timer_event(args->deadline, args->interval, args->leeway); + break; + case TELEMETRY_CMD_PMI_SETUP: + error = telemetry_pmi_setup((enum telemetry_pmi)args->deadline, args->interval); + break; +#endif /* CONFIG_TELEMETRY */ + case TELEMETRY_CMD_VOUCHER_NAME: + if (thread_set_voucher_name((mach_port_name_t)args->deadline)) { + error = EINVAL; + } + break; + + default: + error = EINVAL; + break; + } + + return error; +} + +/* + * Logging + * + * Description: syscall to access kernel logging from userspace + * + * Args: + * tag - used for syncing with userspace on the version. + * flags - flags used by the syscall. + * buffer - userspace address of string to copy. + * size - size of buffer. */ -void -postpipeevent(struct pipe *pipep, int event) -{ - int mask; - struct eventqelt *evq; - - if (pipep == NULL) - return; - KERNEL_DEBUG(DBG_MISC_POST|DBG_FUNC_START, event,0,0,1,0); - - for (evq = pipep->pipe_evlist.tqh_first; - evq != NULL; evq = evq->ee_slist.tqe_next) { - - if (evq->ee_eventmask == 0) - continue; - mask = 0; - - switch (event & (EV_RWBYTES | EV_RCLOSED | EV_WCLOSED)) { - - case EV_RWBYTES: - if ((evq->ee_eventmask & EV_RE) && pipep->pipe_buffer.cnt) { - mask |= EV_RE; - evq->ee_req.er_rcnt = pipep->pipe_buffer.cnt; - } - if ((evq->ee_eventmask & EV_WR) && - (pipep->pipe_buffer.size - pipep->pipe_buffer.cnt) >= PIPE_BUF) { - - if (pipep->pipe_state & PIPE_EOF) { - mask |= EV_WR|EV_RESET; - break; - } - mask |= EV_WR; - evq->ee_req.er_wcnt = pipep->pipe_buffer.size - pipep->pipe_buffer.cnt; - } - break; - - case EV_WCLOSED: - case EV_RCLOSED: - if ((evq->ee_eventmask & EV_RE)) { - mask |= EV_RE|EV_RCLOSED; - } - if ((evq->ee_eventmask & EV_WR)) { - mask |= EV_WR|EV_WCLOSED; - } - break; - - default: - return; - } - if (mask) { - /* - * disarm... postevents are nops until this event is 'read' via - * waitevent and then re-armed via modwatch - */ - evq->ee_eventmask = 0; +int +log_data(__unused struct proc *p, struct log_data_args *args, int *retval) +{ + unsigned int tag = args->tag; + unsigned int flags = args->flags; + user_addr_t buffer = args->buffer; + unsigned int size = args->size; + int ret = 0; + char *log_msg = NULL; + int error; + *retval = 0; - /* - * since events are disarmed until after the waitevent - * the ee_req.er_xxxx fields can't change once we've - * inserted this event into the proc queue... - * therefore, the waitevent will see a 'consistent' - * snapshot of the event, even though it won't hold - * the pipe lock, and we're updating the event outside - * of the proc lock, which it will hold - */ - evq->ee_req.er_eventbits |= mask; + /* + * Tag synchronize the syscall version with userspace. + * Tag == 0 => flags == OS_LOG_TYPE + */ + if (tag != 0) { + return EINVAL; + } - KERNEL_DEBUG(DBG_MISC_POST, evq, evq->ee_req.er_eventbits, mask, 1,0); + /* + * OS_LOG_TYPE are defined in libkern/os/log.h + * In userspace they are defined in libtrace/os/log.h + */ + if (flags != OS_LOG_TYPE_DEFAULT && + flags != OS_LOG_TYPE_INFO && + flags != OS_LOG_TYPE_DEBUG && + flags != OS_LOG_TYPE_ERROR && + flags != OS_LOG_TYPE_FAULT) { + return EINVAL; + } - evprocenque(evq); - } + if (size == 0) { + return EINVAL; + } + + /* truncate to OS_LOG_DATA_MAX_SIZE */ + if (size > OS_LOG_DATA_MAX_SIZE) { + printf("%s: WARNING msg is going to be truncated from %u to %u\n", + __func__, size, OS_LOG_DATA_MAX_SIZE); + size = OS_LOG_DATA_MAX_SIZE; + } + + log_msg = kheap_alloc(KHEAP_TEMP, size, Z_WAITOK); + if (!log_msg) { + return ENOMEM; + } + + error = copyin(buffer, log_msg, size); + if (error) { + ret = EFAULT; + goto out; } - KERNEL_DEBUG(DBG_MISC_POST|DBG_FUNC_END, 0,0,0,1,0); + log_msg[size - 1] = '\0'; + + /* + * This will log to dmesg and logd. + * The call will fail if the current + * process is not a driverKit process. + */ + os_log_driverKit(&ret, OS_LOG_DEFAULT, (os_log_type_t)flags, "%s", log_msg); + +out: + if (log_msg != NULL) { + kheap_free(KHEAP_TEMP, log_msg, size); + } + + return ret; } +#if DEVELOPMENT || DEBUG +#if CONFIG_WAITQ_DEBUG +static uint64_t g_wqset_num = 0; +struct g_wqset { + queue_chain_t link; + struct waitq_set *wqset; +}; -/* - * given either a sockbuf or a socket run down the - * event list and queue ready events found... - * the socket must be locked by the caller - */ -void -postevent(struct socket *sp, struct sockbuf *sb, int event) -{ - int mask; - struct eventqelt *evq; - struct tcpcb *tp; - - if (sb) - sp = sb->sb_so; - if (sp == NULL) - return; - - KERNEL_DEBUG(DBG_MISC_POST|DBG_FUNC_START, (int)sp, event, 0, 0, 0); - - for (evq = sp->so_evlist.tqh_first; - evq != NULL; evq = evq->ee_slist.tqe_next) { - - if (evq->ee_eventmask == 0) - continue; - mask = 0; - - /* ready for reading: - - byte cnt >= receive low water mark - - read-half of conn closed - - conn pending for listening sock - - socket error pending - - ready for writing - - byte cnt avail >= send low water mark - - write half of conn closed - - socket error pending - - non-blocking conn completed successfully - - exception pending - - out of band data - - sock at out of band mark - */ - - switch (event & EV_DMASK) { - - case EV_OOB: - if ((evq->ee_eventmask & EV_EX)) { - if (sp->so_oobmark || ((sp->so_state & SS_RCVATMARK))) - mask |= EV_EX|EV_OOB; - } - break; - - case EV_RWBYTES|EV_OOB: - if ((evq->ee_eventmask & EV_EX)) { - if (sp->so_oobmark || ((sp->so_state & SS_RCVATMARK))) - mask |= EV_EX|EV_OOB; - } - /* - * fall into the next case - */ - case EV_RWBYTES: - if ((evq->ee_eventmask & EV_RE) && soreadable(sp)) { - if (sp->so_error) { - if ((sp->so_type == SOCK_STREAM) && ((sp->so_error == ECONNREFUSED) || (sp->so_error == ECONNRESET))) { - if ((sp->so_pcb == 0) || (((struct inpcb *)sp->so_pcb)->inp_state == INPCB_STATE_DEAD) || !(tp = sototcpcb(sp)) || - (tp->t_state == TCPS_CLOSED)) { - mask |= EV_RE|EV_RESET; - break; - } - } - } - mask |= EV_RE; - evq->ee_req.er_rcnt = sp->so_rcv.sb_cc; - - if (sp->so_state & SS_CANTRCVMORE) { - mask |= EV_FIN; - break; - } - } - if ((evq->ee_eventmask & EV_WR) && sowriteable(sp)) { - if (sp->so_error) { - if ((sp->so_type == SOCK_STREAM) && ((sp->so_error == ECONNREFUSED) || (sp->so_error == ECONNRESET))) { - if ((sp->so_pcb == 0) || (((struct inpcb *)sp->so_pcb)->inp_state == INPCB_STATE_DEAD) || !(tp = sototcpcb(sp)) || - (tp->t_state == TCPS_CLOSED)) { - mask |= EV_WR|EV_RESET; - break; - } - } - } - mask |= EV_WR; - evq->ee_req.er_wcnt = sbspace(&sp->so_snd); - } - break; - - case EV_RCONN: - if ((evq->ee_eventmask & EV_RE)) { - mask |= EV_RE|EV_RCONN; - evq->ee_req.er_rcnt = sp->so_qlen + 1; // incl this one - } - break; - - case EV_WCONN: - if ((evq->ee_eventmask & EV_WR)) { - mask |= EV_WR|EV_WCONN; - } - break; - - case EV_RCLOSED: - if ((evq->ee_eventmask & EV_RE)) { - mask |= EV_RE|EV_RCLOSED; - } - break; - - case EV_WCLOSED: - if ((evq->ee_eventmask & EV_WR)) { - mask |= EV_WR|EV_WCLOSED; - } - break; - - case EV_FIN: - if (evq->ee_eventmask & EV_RE) { - mask |= EV_RE|EV_FIN; - } - break; - - case EV_RESET: - case EV_TIMEOUT: - if (evq->ee_eventmask & EV_RE) { - mask |= EV_RE | event; - } - if (evq->ee_eventmask & EV_WR) { - mask |= EV_WR | event; - } - break; - - default: - KERNEL_DEBUG(DBG_MISC_POST|DBG_FUNC_END, (int)sp, -1, 0, 0, 0); - return; - } /* switch */ - - KERNEL_DEBUG(DBG_MISC_POST, (int)evq, evq->ee_eventmask, evq->ee_req.er_eventbits, mask, 0); - - if (mask) { - /* - * disarm... postevents are nops until this event is 'read' via - * waitevent and then re-armed via modwatch - */ - evq->ee_eventmask = 0; +static queue_head_t g_wqset_list; +static struct waitq_set *g_waitq_set = NULL; - /* - * since events are disarmed until after the waitevent - * the ee_req.er_xxxx fields can't change once we've - * inserted this event into the proc queue... - * since waitevent can't see this event until we - * enqueue it, waitevent will see a 'consistent' - * snapshot of the event, even though it won't hold - * the socket lock, and we're updating the event outside - * of the proc lock, which it will hold - */ - evq->ee_req.er_eventbits |= mask; +static inline struct waitq_set * +sysctl_get_wqset(int idx) +{ + struct g_wqset *gwqs; + + if (!g_wqset_num) { + queue_init(&g_wqset_list); + } - evprocenque(evq); + /* don't bother with locks: this is test-only code! */ + qe_foreach_element(gwqs, &g_wqset_list, link) { + if ((int)(wqset_id(gwqs->wqset) & 0xffffffff) == idx) { + return gwqs->wqset; } } - KERNEL_DEBUG(DBG_MISC_POST|DBG_FUNC_END, (int)sp, 0, 0, 0, 0); + + /* allocate a new one */ + ++g_wqset_num; + gwqs = (struct g_wqset *)kalloc(sizeof(*gwqs)); + assert(gwqs != NULL); + + gwqs->wqset = waitq_set_alloc(SYNC_POLICY_FIFO | SYNC_POLICY_PREPOST, NULL); + enqueue_tail(&g_wqset_list, &gwqs->link); + printf("[WQ]: created new waitq set 0x%llx\n", wqset_id(gwqs->wqset)); + + return gwqs->wqset; } +#define MAX_GLOBAL_TEST_QUEUES 64 +static int g_wq_init = 0; +static struct waitq g_wq[MAX_GLOBAL_TEST_QUEUES]; -/* - * watchevent system call. user passes us an event to watch - * for. we malloc an event object, initialize it, and queue - * it to the open socket. when the event occurs, postevent() - * will enque it back to our proc where we can retrieve it - * via waitevent(). - * - * should this prevent duplicate events on same socket? - */ -int -watchevent(proc_t p, struct watchevent_args *uap, __unused int *retval) +static inline struct waitq * +global_test_waitq(int idx) { - struct eventqelt *evq = (struct eventqelt *)0; - struct eventqelt *np = NULL; - struct eventreq *erp; - struct fileproc *fp = NULL; + if (idx < 0) { + return NULL; + } + + if (!g_wq_init) { + g_wq_init = 1; + for (int i = 0; i < MAX_GLOBAL_TEST_QUEUES; i++) { + waitq_init(&g_wq[i], SYNC_POLICY_FIFO); + } + } + + return &g_wq[idx % MAX_GLOBAL_TEST_QUEUES]; +} + +static int sysctl_waitq_wakeup_one SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) int error; + int index; + struct waitq *waitq; + kern_return_t kr; + int64_t event64 = 0; + + error = SYSCTL_IN(req, &event64, sizeof(event64)); + if (error) { + return error; + } + + if (!req->newptr) { + return SYSCTL_OUT(req, &event64, sizeof(event64)); + } - KERNEL_DEBUG(DBG_MISC_WATCH|DBG_FUNC_START, 0,0,0,0,0); + if (event64 < 0) { + index = (int)((-event64) & 0xffffffff); + waitq = wqset_waitq(sysctl_get_wqset(index)); + index = -index; + } else { + index = (int)event64; + waitq = global_test_waitq(index); + } - // get a qelt and fill with users req - MALLOC(evq, struct eventqelt *, sizeof(struct eventqelt), M_TEMP, M_WAITOK); + event64 = 0; - if (evq == NULL) - panic("can't MALLOC evq"); - erp = &evq->ee_req; + printf("[WQ]: Waking one thread on waitq [%d] event:0x%llx\n", + index, event64); + kr = waitq_wakeup64_one(waitq, (event64_t)event64, THREAD_AWAKENED, + WAITQ_ALL_PRIORITIES); + printf("[WQ]: \tkr=%d\n", kr); - // get users request pkt - if ( (error = copyin(CAST_USER_ADDR_T(uap->u_req), (caddr_t)erp, - sizeof(struct eventreq))) ) { - FREE(evq, M_TEMP); + return SYSCTL_OUT(req, &kr, sizeof(kr)); +} +SYSCTL_PROC(_kern, OID_AUTO, waitq_wakeup_one, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_waitq_wakeup_one, "Q", "wakeup one thread waiting on given event"); - KERNEL_DEBUG(DBG_MISC_WATCH|DBG_FUNC_END, error,0,0,0,0); - return(error); + +static int sysctl_waitq_wakeup_all SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + int error; + int index; + struct waitq *waitq; + kern_return_t kr; + int64_t event64 = 0; + + error = SYSCTL_IN(req, &event64, sizeof(event64)); + if (error) { + return error; } - KERNEL_DEBUG(DBG_MISC_WATCH, erp->er_handle,uap->u_eventmask,evq,0,0); - // validate, freeing qelt if errors - error = 0; - proc_fdlock(p); + if (!req->newptr) { + return SYSCTL_OUT(req, &event64, sizeof(event64)); + } - if (erp->er_type != EV_FD) { - error = EINVAL; - } else if ((error = fp_lookup(p, erp->er_handle, &fp, 1)) != 0) { - error = EBADF; - } else if (fp->f_type == DTYPE_SOCKET) { - socket_lock((struct socket *)fp->f_data, 1); - np = ((struct socket *)fp->f_data)->so_evlist.tqh_first; - } else if (fp->f_type == DTYPE_PIPE) { - PIPE_LOCK((struct pipe *)fp->f_data); - np = ((struct pipe *)fp->f_data)->pipe_evlist.tqh_first; + if (event64 < 0) { + index = (int)((-event64) & 0xffffffff); + waitq = wqset_waitq(sysctl_get_wqset(index)); + index = -index; } else { - fp_drop(p, erp->er_handle, fp, 1); - error = EINVAL; + index = (int)event64; + waitq = global_test_waitq(index); } - proc_fdunlock(p); + event64 = 0; + + printf("[WQ]: Waking all threads on waitq [%d] event:0x%llx\n", + index, event64); + kr = waitq_wakeup64_all(waitq, (event64_t)event64, + THREAD_AWAKENED, WAITQ_ALL_PRIORITIES); + printf("[WQ]: \tkr=%d\n", kr); + + return SYSCTL_OUT(req, &kr, sizeof(kr)); +} +SYSCTL_PROC(_kern, OID_AUTO, waitq_wakeup_all, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_waitq_wakeup_all, "Q", "wakeup all threads waiting on given event"); + + +static int sysctl_waitq_wait SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + int error; + int index; + struct waitq *waitq; + kern_return_t kr; + int64_t event64 = 0; + + error = SYSCTL_IN(req, &event64, sizeof(event64)); if (error) { - FREE(evq, M_TEMP); + return error; + } - KERNEL_DEBUG(DBG_MISC_WATCH|DBG_FUNC_END, error,0,0,0,0); - return(error); + if (!req->newptr) { + return SYSCTL_OUT(req, &event64, sizeof(event64)); } - - /* - * only allow one watch per file per proc - */ - for ( ; np != NULL; np = np->ee_slist.tqe_next) { - if (np->ee_proc == p) { - if (fp->f_type == DTYPE_SOCKET) - socket_unlock((struct socket *)fp->f_data, 1); - else - PIPE_UNLOCK((struct pipe *)fp->f_data); - fp_drop(p, erp->er_handle, fp, 0); - FREE(evq, M_TEMP); - - KERNEL_DEBUG(DBG_MISC_WATCH|DBG_FUNC_END, EINVAL,0,0,0,0); - return(EINVAL); - } - } - erp->er_ecnt = erp->er_rcnt = erp->er_wcnt = erp->er_eventbits = 0; - evq->ee_proc = p; - evq->ee_eventmask = uap->u_eventmask & EV_MASK; - evq->ee_flags = 0; - - if (fp->f_type == DTYPE_SOCKET) { - TAILQ_INSERT_TAIL(&((struct socket *)fp->f_data)->so_evlist, evq, ee_slist); - postevent((struct socket *)fp->f_data, 0, EV_RWBYTES); // catch existing events - - socket_unlock((struct socket *)fp->f_data, 1); + + if (event64 < 0) { + index = (int)((-event64) & 0xffffffff); + waitq = wqset_waitq(sysctl_get_wqset(index)); + index = -index; } else { - TAILQ_INSERT_TAIL(&((struct pipe *)fp->f_data)->pipe_evlist, evq, ee_slist); - postpipeevent((struct pipe *)fp->f_data, EV_RWBYTES); + index = (int)event64; + waitq = global_test_waitq(index); + } + + event64 = 0; - PIPE_UNLOCK((struct pipe *)fp->f_data); + printf("[WQ]: Current thread waiting on waitq [%d] event:0x%llx\n", + index, event64); + kr = waitq_assert_wait64(waitq, (event64_t)event64, THREAD_INTERRUPTIBLE, 0); + if (kr == THREAD_WAITING) { + thread_block(THREAD_CONTINUE_NULL); } - fp_drop_event(p, erp->er_handle, fp); + printf("[WQ]: \tWoke Up: kr=%d\n", kr); - KERNEL_DEBUG(DBG_MISC_WATCH|DBG_FUNC_END, 0,0,0,0,0); - return(0); + return SYSCTL_OUT(req, &kr, sizeof(kr)); } +SYSCTL_PROC(_kern, OID_AUTO, waitq_wait, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_waitq_wait, "Q", "start waiting on given event"); +static int sysctl_wqset_select SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + int error; + struct waitq_set *wqset; + uint64_t event64 = 0; -/* - * waitevent system call. - * grabs the next waiting event for this proc and returns - * it. if no events, user can request to sleep with timeout - * or poll mode (tv=NULL); - */ -int -waitevent(proc_t p, struct waitevent_args *uap, int *retval) + error = SYSCTL_IN(req, &event64, sizeof(event64)); + if (error) { + return error; + } + + if (!req->newptr) { + goto out; + } + + wqset = sysctl_get_wqset((int)(event64 & 0xffffffff)); + g_waitq_set = wqset; + + event64 = wqset_id(wqset); + printf("[WQ]: selected wqset 0x%llx\n", event64); + +out: + if (g_waitq_set) { + event64 = wqset_id(g_waitq_set); + } else { + event64 = (uint64_t)(-1); + } + + return SYSCTL_OUT(req, &event64, sizeof(event64)); +} +SYSCTL_PROC(_kern, OID_AUTO, wqset_select, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_wqset_select, "Q", "select/create a global waitq set"); + + +static int sysctl_waitq_link SYSCTL_HANDLER_ARGS { - int error = 0; - struct eventqelt *evq; - struct eventreq er; - uint64_t abstime, interval; +#pragma unused(oidp, arg1, arg2) + int error; + int index; + struct waitq *waitq; + struct waitq_set *wqset; + kern_return_t kr; + uint64_t reserved_link = 0; + int64_t event64 = 0; + + error = SYSCTL_IN(req, &event64, sizeof(event64)); + if (error) { + return error; + } - if (uap->tv) { - struct timeval atv; + if (!req->newptr) { + return SYSCTL_OUT(req, &event64, sizeof(event64)); + } - error = copyin(CAST_USER_ADDR_T(uap->tv), (caddr_t)&atv, sizeof (atv)); - if (error) - return(error); - if (itimerfix(&atv)) { - error = EINVAL; - return(error); + if (!g_waitq_set) { + g_waitq_set = sysctl_get_wqset(1); + } + wqset = g_waitq_set; + + if (event64 < 0) { + struct waitq_set *tmp; + index = (int)((-event64) & 0xffffffff); + tmp = sysctl_get_wqset(index); + if (tmp == wqset) { + goto out; } - interval = tvtoabstime(&atv); - } else - interval = 0; + waitq = wqset_waitq(tmp); + index = -index; + } else { + index = (int)event64; + waitq = global_test_waitq(index); + } - KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_START, 0,0,0,0,0); + printf("[WQ]: linking waitq [%d] to global wqset (0x%llx)\n", + index, wqset_id(wqset)); + reserved_link = waitq_link_reserve(waitq); + kr = waitq_link(waitq, wqset, WAITQ_SHOULD_LOCK, &reserved_link); + waitq_link_release(reserved_link); - proc_lock(p); -retry: - if ((evq = p->p_evlist.tqh_first) != NULL) { - /* - * found one... make a local copy while it's still on the queue - * to prevent it from changing while in the midst of copying - * don't want to hold the proc lock across a copyout because - * it might block on a page fault at the target in user space - */ - bcopy((caddr_t)&evq->ee_req, (caddr_t)&er, sizeof (struct eventreq)); + printf("[WQ]: \tkr=%d\n", kr); - TAILQ_REMOVE(&p->p_evlist, evq, ee_plist); +out: + return SYSCTL_OUT(req, &kr, sizeof(kr)); +} +SYSCTL_PROC(_kern, OID_AUTO, waitq_link, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_waitq_link, "Q", "link global waitq to test waitq set"); - evq->ee_flags &= ~EV_QUEUED; - proc_unlock(p); +static int sysctl_waitq_unlink SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + int error; + int index; + struct waitq *waitq; + struct waitq_set *wqset; + kern_return_t kr; + uint64_t event64 = 0; - error = copyout((caddr_t)&er, CAST_USER_ADDR_T(uap->u_req), sizeof(struct eventreq)); + error = SYSCTL_IN(req, &event64, sizeof(event64)); + if (error) { + return error; + } - KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_END, error, - evq->ee_req.er_handle,evq->ee_req.er_eventbits,evq,0); - return (error); + if (!req->newptr) { + return SYSCTL_OUT(req, &event64, sizeof(event64)); } - else { - if (uap->tv && interval == 0) { - proc_unlock(p); - *retval = 1; // poll failed - KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_END, error,0,0,0,0); - return (error); - } - if (interval != 0) - clock_absolutetime_interval_to_deadline(interval, &abstime); - else - abstime = 0; + if (!g_waitq_set) { + g_waitq_set = sysctl_get_wqset(1); + } + wqset = g_waitq_set; - KERNEL_DEBUG(DBG_MISC_WAIT, 1,&p->p_evlist,0,0,0); + index = (int)event64; + waitq = global_test_waitq(index); - error = msleep1(&p->p_evlist, &p->p_mlock, (PSOCK | PCATCH), "waitevent", abstime); + printf("[WQ]: unlinking waitq [%d] from global wqset (0x%llx)\n", + index, wqset_id(wqset)); - KERNEL_DEBUG(DBG_MISC_WAIT, 2,&p->p_evlist,0,0,0); + kr = waitq_unlink(waitq, wqset); + printf("[WQ]: \tkr=%d\n", kr); - if (error == 0) - goto retry; - if (error == ERESTART) - error = EINTR; - if (error == EWOULDBLOCK) { - *retval = 1; - error = 0; - } + return SYSCTL_OUT(req, &kr, sizeof(kr)); +} +SYSCTL_PROC(_kern, OID_AUTO, waitq_unlink, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_waitq_unlink, "Q", "unlink global waitq from test waitq set"); + + +static int sysctl_waitq_clear_prepost SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + struct waitq *waitq; + uint64_t event64 = 0; + int error, index; + + error = SYSCTL_IN(req, &event64, sizeof(event64)); + if (error) { + return error; } - proc_unlock(p); - KERNEL_DEBUG(DBG_MISC_WAIT|DBG_FUNC_END, 0,0,0,0,0); - return (error); + if (!req->newptr) { + return SYSCTL_OUT(req, &event64, sizeof(event64)); + } + + index = (int)event64; + waitq = global_test_waitq(index); + + printf("[WQ]: clearing prepost on waitq [%d]\n", index); + waitq_clear_prepost(waitq); + + return SYSCTL_OUT(req, &event64, sizeof(event64)); } +SYSCTL_PROC(_kern, OID_AUTO, waitq_clear_prepost, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_waitq_clear_prepost, "Q", "clear prepost on given waitq"); -/* - * modwatch system call. user passes in event to modify. - * if we find it we reset the event bits and que/deque event - * it needed. - */ -int -modwatch(proc_t p, struct modwatch_args *uap, __unused int *retval) +static int sysctl_wqset_unlink_all SYSCTL_HANDLER_ARGS { - struct eventreq er; - struct eventreq *erp = &er; - struct eventqelt *evq; +#pragma unused(oidp, arg1, arg2) int error; - struct fileproc *fp; - int flag; + struct waitq_set *wqset; + kern_return_t kr; + uint64_t event64 = 0; - KERNEL_DEBUG(DBG_MISC_MOD|DBG_FUNC_START, 0,0,0,0,0); + error = SYSCTL_IN(req, &event64, sizeof(event64)); + if (error) { + return error; + } - /* - * get user's request pkt - */ - if ((error = copyin(CAST_USER_ADDR_T(uap->u_req), (caddr_t)erp, - sizeof(struct eventreq)))) { - KERNEL_DEBUG(DBG_MISC_MOD|DBG_FUNC_END, error,0,0,0,0); - return(error); + if (!req->newptr) { + return SYSCTL_OUT(req, &event64, sizeof(event64)); } - proc_fdlock(p); - if (erp->er_type != EV_FD) { - error = EINVAL; - } else if ((error = fp_lookup(p, erp->er_handle, &fp, 1)) != 0) { - error = EBADF; - } else if (fp->f_type == DTYPE_SOCKET) { - socket_lock((struct socket *)fp->f_data, 1); - evq = ((struct socket *)fp->f_data)->so_evlist.tqh_first; - } else if (fp->f_type == DTYPE_PIPE) { - PIPE_LOCK((struct pipe *)fp->f_data); - evq = ((struct pipe *)fp->f_data)->pipe_evlist.tqh_first; - } else { - fp_drop(p, erp->er_handle, fp, 1); - error = EINVAL; + if (!g_waitq_set) { + g_waitq_set = sysctl_get_wqset(1); } + wqset = g_waitq_set; + + printf("[WQ]: unlinking all queues from global wqset (0x%llx)\n", + wqset_id(wqset)); + kr = waitq_set_unlink_all(wqset); + printf("[WQ]: \tkr=%d\n", kr); + + return SYSCTL_OUT(req, &kr, sizeof(kr)); +} +SYSCTL_PROC(_kern, OID_AUTO, wqset_unlink_all, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_wqset_unlink_all, "Q", "unlink all queues from test waitq set"); + + +static int sysctl_wqset_clear_preposts SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + struct waitq_set *wqset = NULL; + uint64_t event64 = 0; + int error, index; + + error = SYSCTL_IN(req, &event64, sizeof(event64)); if (error) { - proc_fdunlock(p); - KERNEL_DEBUG(DBG_MISC_MOD|DBG_FUNC_END, error,0,0,0,0); - return(error); + return error; } - if ((uap->u_eventmask == EV_RM) && (fp->f_flags & FP_WAITEVENT)) { - fp->f_flags &= ~FP_WAITEVENT; + if (!req->newptr) { + goto out; } - proc_fdunlock(p); - // locate event if possible - for ( ; evq != NULL; evq = evq->ee_slist.tqe_next) { - if (evq->ee_proc == p) - break; + index = (int)((event64) & 0xffffffff); + wqset = sysctl_get_wqset(index); + assert(wqset != NULL); + + printf("[WQ]: clearing preposts on wqset 0x%llx\n", wqset_id(wqset)); + waitq_set_clear_preposts(wqset); + +out: + if (wqset) { + event64 = wqset_id(wqset); + } else { + event64 = (uint64_t)(-1); } - if (evq == NULL) { - if (fp->f_type == DTYPE_SOCKET) - socket_unlock((struct socket *)fp->f_data, 1); - else - PIPE_UNLOCK((struct pipe *)fp->f_data); - fp_drop(p, erp->er_handle, fp, 0); - KERNEL_DEBUG(DBG_MISC_MOD|DBG_FUNC_END, EINVAL,0,0,0,0); - return(EINVAL); + + return SYSCTL_OUT(req, &event64, sizeof(event64)); +} +SYSCTL_PROC(_kern, OID_AUTO, wqset_clear_preposts, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_wqset_clear_preposts, "Q", "clear preposts on given waitq set"); + +#endif /* CONFIG_WAITQ_DEBUG */ + +static int +sysctl_waitq_set_nelem SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + int nelem; + + /* Read only */ + if (req->newptr != USER_ADDR_NULL) { + return EPERM; } - KERNEL_DEBUG(DBG_MISC_MOD, erp->er_handle,uap->u_eventmask,evq,0,0); - if (uap->u_eventmask == EV_RM) { - EVPROCDEQUE(p, evq); + nelem = sysctl_helper_waitq_set_nelem(); - if (fp->f_type == DTYPE_SOCKET) { - TAILQ_REMOVE(&((struct socket *)fp->f_data)->so_evlist, evq, ee_slist); - socket_unlock((struct socket *)fp->f_data, 1); + return SYSCTL_OUT(req, &nelem, sizeof(nelem)); +} + +SYSCTL_PROC(_kern, OID_AUTO, n_ltable_entries, CTLFLAG_RD | CTLFLAG_LOCKED, + 0, 0, sysctl_waitq_set_nelem, "I", "ltable elementis currently used"); + + +static int +sysctl_mpsc_test_pingpong SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + uint64_t value = 0; + int error; + + error = SYSCTL_IN(req, &value, sizeof(value)); + if (error) { + return error; + } + + if (error == 0 && req->newptr) { + error = mpsc_test_pingpong(value, &value); + if (error == 0) { + error = SYSCTL_OUT(req, &value, sizeof(value)); + } + } + + return error; +} +SYSCTL_PROC(_kern, OID_AUTO, mpsc_test_pingpong, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_mpsc_test_pingpong, "Q", "MPSC tests: pingpong"); + +#endif /* DEVELOPMENT || DEBUG */ + +/*Remote Time api*/ +SYSCTL_NODE(_machdep, OID_AUTO, remotetime, CTLFLAG_RD | CTLFLAG_LOCKED, 0, "Remote time api"); + +#if DEVELOPMENT || DEBUG +#if CONFIG_MACH_BRIDGE_SEND_TIME +extern _Atomic uint32_t bt_init_flag; +extern uint32_t mach_bridge_timer_enable(uint32_t, int); + +SYSCTL_INT(_machdep_remotetime, OID_AUTO, bridge_timer_init_flag, + CTLFLAG_RD | CTLFLAG_LOCKED, &bt_init_flag, 0, ""); + +static int sysctl_mach_bridge_timer_enable SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + uint32_t value = 0; + int error = 0; + /* User is querying buffer size */ + if (req->oldptr == USER_ADDR_NULL && req->newptr == USER_ADDR_NULL) { + req->oldidx = sizeof(value); + return 0; + } + if (os_atomic_load(&bt_init_flag, acquire)) { + if (req->newptr) { + int new_value = 0; + error = SYSCTL_IN(req, &new_value, sizeof(new_value)); + if (error) { + return error; + } + if (new_value == 0 || new_value == 1) { + value = mach_bridge_timer_enable(new_value, 1); + } else { + return EPERM; + } } else { - TAILQ_REMOVE(&((struct pipe *)fp->f_data)->pipe_evlist, evq, ee_slist); - PIPE_UNLOCK((struct pipe *)fp->f_data); - } - fp_drop(p, erp->er_handle, fp, 0); - FREE(evq, M_TEMP); - KERNEL_DEBUG(DBG_MISC_MOD|DBG_FUNC_END, 0,0,0,0,0); - return(0); - } - switch (uap->u_eventmask & EV_MASK) { - - case 0: - flag = 0; - break; + value = mach_bridge_timer_enable(0, 0); + } + } + error = SYSCTL_OUT(req, &value, sizeof(value)); + return error; +} - case EV_RE: - case EV_WR: - case EV_RE|EV_WR: - flag = EV_RWBYTES; - break; +SYSCTL_PROC(_machdep_remotetime, OID_AUTO, bridge_timer_enable, + CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_mach_bridge_timer_enable, "I", ""); - case EV_EX: - flag = EV_OOB; - break; +#endif /* CONFIG_MACH_BRIDGE_SEND_TIME */ - case EV_EX|EV_RE: - case EV_EX|EV_WR: - case EV_EX|EV_RE|EV_WR: - flag = EV_OOB|EV_RWBYTES; - break; +static int sysctl_mach_bridge_remote_time SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + uint64_t ltime = 0, rtime = 0; + if (req->oldptr == USER_ADDR_NULL) { + req->oldidx = sizeof(rtime); + return 0; + } + if (req->newptr) { + int error = SYSCTL_IN(req, <ime, sizeof(ltime)); + if (error) { + return error; + } + } + rtime = mach_bridge_remote_time(ltime); + return SYSCTL_OUT(req, &rtime, sizeof(rtime)); +} +SYSCTL_PROC(_machdep_remotetime, OID_AUTO, mach_bridge_remote_time, + CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_mach_bridge_remote_time, "Q", ""); - default: - if (fp->f_type == DTYPE_SOCKET) - socket_unlock((struct socket *)fp->f_data, 1); - else - PIPE_UNLOCK((struct pipe *)fp->f_data); - fp_drop(p, erp->er_handle, fp, 0); - KERNEL_DEBUG(DBG_MISC_WATCH|DBG_FUNC_END, EINVAL,0,0,0,0); - return(EINVAL); +#endif /* DEVELOPMENT || DEBUG */ + +#if CONFIG_MACH_BRIDGE_RECV_TIME +extern struct bt_params bt_params_get_latest(void); + +static int sysctl_mach_bridge_conversion_params SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + struct bt_params params = {}; + if (req->oldptr == USER_ADDR_NULL) { + req->oldidx = sizeof(struct bt_params); + return 0; } - /* - * since we're holding the socket/pipe lock, the event - * cannot go from the unqueued state to the queued state - * however, it can go from the queued state to the unqueued state - * since that direction is protected by the proc_lock... - * so do a quick check for EV_QUEUED w/o holding the proc lock - * since by far the common case will be NOT EV_QUEUED, this saves - * us taking the proc_lock the majority of the time - */ - if (evq->ee_flags & EV_QUEUED) { - /* - * EVPROCDEQUE will recheck the state after it grabs the proc_lock - */ - EVPROCDEQUE(p, evq); + if (req->newptr) { + return EPERM; } + params = bt_params_get_latest(); + return SYSCTL_OUT(req, ¶ms, MIN(sizeof(params), req->oldlen)); +} + +SYSCTL_PROC(_machdep_remotetime, OID_AUTO, conversion_params, + CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, + 0, sysctl_mach_bridge_conversion_params, "S,bt_params", ""); + +#endif /* CONFIG_MACH_BRIDGE_RECV_TIME */ + +#if DEVELOPMENT || DEBUG + +#include +extern int32_t sysctl_get_bound_cpuid(void); +extern kern_return_t sysctl_thread_bind_cpuid(int32_t cpuid); +static int +sysctl_kern_sched_thread_bind_cpu SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + /* - * while the event is off the proc queue and - * we're holding the socket/pipe lock - * it's safe to update these fields... + * DO NOT remove this bootarg guard or make this non-development. + * This kind of binding should only be used for tests and + * experiments in a custom configuration, never shipping code. */ - evq->ee_req.er_eventbits = 0; - evq->ee_eventmask = uap->u_eventmask & EV_MASK; - if (fp->f_type == DTYPE_SOCKET) { - postevent((struct socket *)fp->f_data, 0, flag); - socket_unlock((struct socket *)fp->f_data, 1); + if (!PE_parse_boot_argn("enable_skstb", NULL, 0)) { + return ENOENT; + } + + int32_t cpuid = sysctl_get_bound_cpuid(); + + int32_t new_value; + int changed; + int error = sysctl_io_number(req, cpuid, sizeof cpuid, &new_value, &changed); + if (error) { + return error; } - else { - postpipeevent((struct pipe *)fp->f_data, flag); - PIPE_UNLOCK((struct pipe *)fp->f_data); + + if (changed) { + kern_return_t kr = sysctl_thread_bind_cpuid(new_value); + + if (kr == KERN_NOT_SUPPORTED) { + return ENOTSUP; + } + + if (kr == KERN_INVALID_VALUE) { + return ERANGE; + } } - fp_drop(p, erp->er_handle, fp, 0); - KERNEL_DEBUG(DBG_MISC_MOD|DBG_FUNC_END, evq->ee_req.er_handle,evq->ee_eventmask,fp->f_data,flag,0); - return(0); + + return error; } -/* this routine is called from the close of fd with proc_fdlock held */ -int -waitevent_close(struct proc *p, struct fileproc *fp) +SYSCTL_PROC(_kern, OID_AUTO, sched_thread_bind_cpu, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_kern_sched_thread_bind_cpu, "I", ""); + +#if __AMP__ +extern char sysctl_get_bound_cluster_type(void); +extern void sysctl_thread_bind_cluster_type(char cluster_type); +static int +sysctl_kern_sched_thread_bind_cluster_type SYSCTL_HANDLER_ARGS { - struct eventqelt *evq; +#pragma unused(oidp, arg1, arg2) + char buff[4]; + if (!PE_parse_boot_argn("enable_skstb", NULL, 0)) { + return ENOENT; + } - fp->f_flags &= ~FP_WAITEVENT; + int error = SYSCTL_IN(req, buff, 1); + if (error) { + return error; + } + char cluster_type = buff[0]; - if (fp->f_type == DTYPE_SOCKET) { - socket_lock((struct socket *)fp->f_data, 1); - evq = ((struct socket *)fp->f_data)->so_evlist.tqh_first; + if (!req->newptr) { + goto out; } - else if (fp->f_type == DTYPE_PIPE) { - PIPE_LOCK((struct pipe *)fp->f_data); - evq = ((struct pipe *)fp->f_data)->pipe_evlist.tqh_first; + + sysctl_thread_bind_cluster_type(cluster_type); +out: + cluster_type = sysctl_get_bound_cluster_type(); + buff[0] = cluster_type; + + return SYSCTL_OUT(req, buff, 1); +} + +SYSCTL_PROC(_kern, OID_AUTO, sched_thread_bind_cluster_type, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_kern_sched_thread_bind_cluster_type, "A", ""); + +extern char sysctl_get_task_cluster_type(void); +extern void sysctl_task_set_cluster_type(char cluster_type); +static int +sysctl_kern_sched_task_set_cluster_type SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + char buff[4]; + + if (!PE_parse_boot_argn("enable_skstsct", NULL, 0)) { + return ENOENT; } - else { - return(EINVAL); + + int error = SYSCTL_IN(req, buff, 1); + if (error) { + return error; + } + char cluster_type = buff[0]; + + if (!req->newptr) { + goto out; } - proc_fdunlock(p); + sysctl_task_set_cluster_type(cluster_type); +out: + cluster_type = sysctl_get_task_cluster_type(); + buff[0] = cluster_type; + + return SYSCTL_OUT(req, buff, 1); +} + +SYSCTL_PROC(_kern, OID_AUTO, sched_task_set_cluster_type, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_kern_sched_task_set_cluster_type, "A", ""); + +#if CONFIG_SCHED_EDGE + +/* + * Edge Scheduler Sysctls + * + * The Edge scheduler uses edge configurations to decide feasability of + * migrating threads across clusters. The sysctls allow dynamic configuration + * of the edge properties and edge weights. This configuration is typically + * updated via callouts from CLPC. + * + * + */ +extern sched_clutch_edge sched_edge_config_e_to_p; +extern sched_clutch_edge sched_edge_config_p_to_e; +extern kern_return_t sched_edge_sysctl_configure_e_to_p(uint64_t); +extern kern_return_t sched_edge_sysctl_configure_p_to_e(uint64_t); +extern sched_clutch_edge sched_edge_e_to_p(void); +extern sched_clutch_edge sched_edge_p_to_e(void); + +static int sysctl_sched_edge_config_e_to_p SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + int error; + kern_return_t kr; + int64_t edge_config = 0; - // locate event if possible - for ( ; evq != NULL; evq = evq->ee_slist.tqe_next) { - if (evq->ee_proc == p) - break; + error = SYSCTL_IN(req, &edge_config, sizeof(edge_config)); + if (error) { + return error; } - if (evq == NULL) { - if (fp->f_type == DTYPE_SOCKET) - socket_unlock((struct socket *)fp->f_data, 1); - else - PIPE_UNLOCK((struct pipe *)fp->f_data); - proc_fdlock(p); + if (!req->newptr) { + edge_config = sched_edge_e_to_p().sce_edge_packed; + return SYSCTL_OUT(req, &edge_config, sizeof(edge_config)); + } + + kr = sched_edge_sysctl_configure_e_to_p(edge_config); + return SYSCTL_OUT(req, &kr, sizeof(kr)); +} +SYSCTL_PROC(_kern, OID_AUTO, sched_edge_config_e_to_p, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_sched_edge_config_e_to_p, "Q", "Edge Scheduler Config for E-to-P cluster"); + +static int sysctl_sched_edge_config_p_to_e SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + int error; + kern_return_t kr; + int64_t edge_config = 0; - return(EINVAL); + error = SYSCTL_IN(req, &edge_config, sizeof(edge_config)); + if (error) { + return error; } - EVPROCDEQUE(p, evq); - if (fp->f_type == DTYPE_SOCKET) { - TAILQ_REMOVE(&((struct socket *)fp->f_data)->so_evlist, evq, ee_slist); - socket_unlock((struct socket *)fp->f_data, 1); - } else { - TAILQ_REMOVE(&((struct pipe *)fp->f_data)->pipe_evlist, evq, ee_slist); - PIPE_UNLOCK((struct pipe *)fp->f_data); + if (!req->newptr) { + edge_config = sched_edge_p_to_e().sce_edge_packed; + return SYSCTL_OUT(req, &edge_config, sizeof(edge_config)); } - FREE(evq, M_TEMP); - proc_fdlock(p); + kr = sched_edge_sysctl_configure_p_to_e(edge_config); + return SYSCTL_OUT(req, &kr, sizeof(kr)); +} +SYSCTL_PROC(_kern, OID_AUTO, sched_edge_config_p_to_e, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_sched_edge_config_p_to_e, "Q", "Edge Scheduler Config for P-to-E cluster"); + +extern int sched_edge_restrict_ut; +SYSCTL_INT(_kern, OID_AUTO, sched_edge_restrict_ut, CTLFLAG_RW | CTLFLAG_LOCKED, &sched_edge_restrict_ut, 0, "Edge Scheduler Restrict UT Threads"); +extern int sched_edge_restrict_bg; +SYSCTL_INT(_kern, OID_AUTO, sched_edge_restrict_bg, CTLFLAG_RW | CTLFLAG_LOCKED, &sched_edge_restrict_ut, 0, "Edge Scheduler Restrict BG Threads"); +extern int sched_edge_migrate_ipi_immediate; +SYSCTL_INT(_kern, OID_AUTO, sched_edge_migrate_ipi_immediate, CTLFLAG_RW | CTLFLAG_LOCKED, &sched_edge_migrate_ipi_immediate, 0, "Edge Scheduler uses immediate IPIs for migration event based on execution latency"); + +#endif /* CONFIG_SCHED_EDGE */ + +#endif /* __AMP__ */ + +/* used for testing by exception_tests */ +extern uint32_t ipc_control_port_options; +SYSCTL_INT(_kern, OID_AUTO, ipc_control_port_options, + CTLFLAG_RD | CTLFLAG_LOCKED, &ipc_control_port_options, 0, ""); + +#endif /* DEVELOPMENT || DEBUG */ + +extern uint32_t task_exc_guard_default; + +SYSCTL_INT(_kern, OID_AUTO, task_exc_guard_default, + CTLFLAG_RD | CTLFLAG_LOCKED, &task_exc_guard_default, 0, ""); + + +static int +sysctl_kern_tcsm_available SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + uint32_t value = machine_csv(CPUVN_CI) ? 1 : 0; + + if (req->newptr) { + return EINVAL; + } + + return SYSCTL_OUT(req, &value, sizeof(value)); +} +SYSCTL_PROC(_kern, OID_AUTO, tcsm_available, + CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED | CTLFLAG_MASKED | CTLFLAG_ANYBODY, + 0, 0, sysctl_kern_tcsm_available, "I", ""); + + +static int +sysctl_kern_tcsm_enable SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + uint32_t soflags = 0; + uint32_t old_value = thread_get_no_smt() ? 1 : 0; + + int error = SYSCTL_IN(req, &soflags, sizeof(soflags)); + if (error) { + return error; + } + + if (soflags && machine_csv(CPUVN_CI)) { + thread_set_no_smt(true); + machine_tecs(current_thread()); + } - return(0); + return SYSCTL_OUT(req, &old_value, sizeof(old_value)); } +SYSCTL_PROC(_kern, OID_AUTO, tcsm_enable, + CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED | CTLFLAG_MASKED | CTLFLAG_ANYBODY, + 0, 0, sysctl_kern_tcsm_enable, "I", ""); + + +#if DEVELOPMENT || DEBUG +extern void sysctl_task_set_no_smt(char no_smt); +extern char sysctl_task_get_no_smt(void); + +static int +sysctl_kern_sched_task_set_no_smt SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + char buff[4]; + + int error = SYSCTL_IN(req, buff, 1); + if (error) { + return error; + } + char no_smt = buff[0]; + + if (!req->newptr) { + goto out; + } + + sysctl_task_set_no_smt(no_smt); +out: + no_smt = sysctl_task_get_no_smt(); + buff[0] = no_smt; + + return SYSCTL_OUT(req, buff, 1); +} + +SYSCTL_PROC(_kern, OID_AUTO, sched_task_set_no_smt, CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_LOCKED | CTLFLAG_ANYBODY, + 0, 0, sysctl_kern_sched_task_set_no_smt, "A", ""); + +static int +sysctl_kern_sched_thread_set_no_smt(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req) +{ + int new_value, changed; + int old_value = thread_get_no_smt() ? 1 : 0; + int error = sysctl_io_number(req, old_value, sizeof(int), &new_value, &changed); + + if (changed) { + thread_set_no_smt(!!new_value); + } + + return error; +} + +SYSCTL_PROC(_kern, OID_AUTO, sched_thread_set_no_smt, + CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED | CTLFLAG_ANYBODY, + 0, 0, sysctl_kern_sched_thread_set_no_smt, "I", ""); + +static int +sysctl_kern_debug_get_preoslog SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + static bool oneshot_executed = false; + size_t preoslog_size = 0; + const char *preoslog = NULL; + + // DumpPanic pases a non-zero write value when it needs oneshot behaviour + if (req->newptr) { + uint8_t oneshot = 0; + int error = SYSCTL_IN(req, &oneshot, sizeof(oneshot)); + if (error) { + return error; + } + + if (oneshot) { + if (!OSCompareAndSwap8(false, true, &oneshot_executed)) { + return EPERM; + } + } + } + + preoslog = sysctl_debug_get_preoslog(&preoslog_size); + if (preoslog == NULL || preoslog_size == 0) { + return 0; + } + + if (req->oldptr == USER_ADDR_NULL) { + req->oldidx = preoslog_size; + return 0; + } + + return SYSCTL_OUT(req, preoslog, preoslog_size); +} + +SYSCTL_PROC(_kern, OID_AUTO, preoslog, CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_kern_debug_get_preoslog, "-", ""); + +static int +sysctl_kern_task_set_filter_msg_flag SYSCTL_HANDLER_ARGS +{ +#pragma unused(oidp, arg1, arg2) + int new_value, changed; + int old_value = task_get_filter_msg_flag(current_task()) ? 1 : 0; + int error = sysctl_io_number(req, old_value, sizeof(int), &new_value, &changed); + + if (changed) { + task_set_filter_msg_flag(current_task(), !!new_value); + } + + return error; +} + +SYSCTL_PROC(_kern, OID_AUTO, task_set_filter_msg_flag, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, + 0, 0, sysctl_kern_task_set_filter_msg_flag, "I", ""); +#endif /* DEVELOPMENT || DEBUG */