/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
/*
*
* @(#)kern_descrip.c 8.8 (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 <sys/param.h>
#include <sys/systm.h>
#include <sys/pipe.h>
#include <kern/kern_types.h>
#include <kern/kalloc.h>
+#include <libkern/OSAtomic.h>
+
+#include <sys/ubc.h>
struct psemnode;
struct pshmnode;
-int fdopen(dev_t dev, int mode, int type, struct proc *p);
-int ogetdtablesize(struct proc *p, void *uap, register_t *retval);
-int finishdup(struct proc * p, struct filedesc *fdp, int old, int new, register_t *retval);
+int fdopen(dev_t dev, int mode, int type, proc_t p);
+int finishdup(proc_t p, struct filedesc *fdp, int old, int new, register_t *retval);
-int closef(struct fileglob *fg, struct proc *p);
-int falloc_locked(struct proc *p, struct fileproc **resultfp, int *resultfd, int locked);
-void fddrop(struct proc *p, int fd);
-int fdgetf_noref(struct proc *p, int fd, struct fileproc **resultfp);
+int falloc_locked(proc_t p, struct fileproc **resultfp, int *resultfd, vfs_context_t ctx, int locked);
+int fdgetf_noref(proc_t p, int fd, struct fileproc **resultfp);
void fg_drop(struct fileproc * fp);
void fg_free(struct fileglob *fg);
void fg_ref(struct fileproc * fp);
-int fp_getfpshm(struct proc *p, int fd, struct fileproc **resultfp, struct pshmnode **resultpshm);
-static int closef_finish(struct fileproc *fp, struct fileglob *fg, struct proc *p);
+/* flags for close_internal_locked */
+#define FD_DUP2RESV 1
+static int close_internal_locked(struct proc *p, int fd, struct fileproc *fp, int flags);
+
+static int closef_finish(struct fileproc *fp, struct fileglob *fg, proc_t p, vfs_context_t ctx);
+
+/* We don't want these exported */
+__private_extern__
+int open1(vfs_context_t, struct nameidata *, int, struct vnode_attr *, register_t *);
+
+__private_extern__
+int unlink1(vfs_context_t, struct nameidata *, int);
+
+static void _fdrelse(struct proc * p, int fd);
-extern void file_lock_init(void);
-extern int is_suser(void);
-extern int kqueue_stat(struct fileproc *fp, struct stat *st, struct proc *p);
-extern int soo_stat(struct socket *so, struct stat *ub);
-extern int vn_path_package_check(vnode_t vp, char *path, int pathlen, int *component);
+
+extern void file_lock_init(void) __attribute__((section("__TEXT, initcode")));
+extern int kqueue_stat(struct fileproc *fp, void *ub, int isstat4, proc_t p);
+#if SOCKETS
+extern int soo_stat(struct socket *so, void *ub, int isstat64);
+#endif /* SOCKETS */
extern kauth_scope_t kauth_scope_fileop;
lck_attr_t * file_lck_attr;
lck_mtx_t * uipc_lock;
-lck_mtx_t * file_iterate_lcok;
lck_mtx_t * file_flist_lock;
+/*
+ * file_lock_init
+ *
+ * Description: Initialize the file lock group and the uipc and flist locks
+ *
+ * Parameters: (void)
+ *
+ * Returns: void
+ *
+ * Notes: Called at system startup from bsd_init().
+ */
void
file_lock_init(void)
{
-
/* allocate file lock group attribute and group */
file_lck_grp_attr= lck_grp_attr_alloc_init();
- lck_grp_attr_setstat(file_lck_grp_attr);
file_lck_grp = lck_grp_alloc_init("file", file_lck_grp_attr);
/* Allocate file lock attribute */
file_lck_attr = lck_attr_alloc_init();
- //lck_attr_setdebug(file_lck_attr);
uipc_lock = lck_mtx_alloc_init(file_lck_grp, file_lck_attr);
- file_iterate_lcok = lck_mtx_alloc_init(file_lck_grp, file_lck_attr);
file_flist_lock = lck_mtx_alloc_init(file_lck_grp, file_lck_attr);
+}
-
+/*
+ * proc_fdlock, proc_fdlock_spin
+ *
+ * Description: Lock to control access to the per process struct fileproc
+ * and struct filedesc
+ *
+ * Parameters: p Process to take the lock on
+ *
+ * Returns: void
+ *
+ * Notes: The lock is initialized in forkproc() and destroyed in
+ * reap_child_process().
+ */
+void
+proc_fdlock(proc_t p)
+{
+ lck_mtx_lock(&p->p_fdmlock);
}
+void
+proc_fdlock_spin(proc_t p)
+{
+ lck_mtx_lock_spin(&p->p_fdmlock);
+}
void
-proc_fdlock(struct proc *p)
+proc_fdlock_assert(proc_t p, int assertflags)
{
- lck_mtx_lock(&p->p_fdmlock);
+ lck_mtx_assert(&p->p_fdmlock, assertflags);
}
+
+/*
+ * proc_fdunlock
+ *
+ * Description: Unlock the lock previously locked by a call to proc_fdlock()
+ *
+ * Parameters: p Process to drop the lock on
+ *
+ * Returns: void
+ */
void
-proc_fdunlock(struct proc *p)
+proc_fdunlock(proc_t p)
{
lck_mtx_unlock(&p->p_fdmlock);
}
+
/*
* System calls on descriptors.
*/
+
+/*
+ * getdtablesize
+ *
+ * Description: Returns the per process maximum size of the descriptor table
+ *
+ * Parameters: p Process being queried
+ * retval Pointer to the call return area
+ *
+ * Returns: 0 Success
+ *
+ * Implicit returns:
+ * *retval (modified) Size of dtable
+ */
int
-getdtablesize(struct proc *p, __unused struct getdtablesize_args *uap, register_t *retval)
+getdtablesize(proc_t p, __unused struct getdtablesize_args *uap, register_t *retval)
{
- proc_fdlock(p);
+ proc_fdlock_spin(p);
*retval = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfiles);
proc_fdunlock(p);
return (0);
}
-int
-ogetdtablesize(struct proc *p, __unused void *uap, register_t *retval)
+
+void
+procfdtbl_reservefd(struct proc * p, int fd)
{
- proc_fdlock(p);
- *retval = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, NOFILE);
- proc_fdunlock(p);
+ p->p_fd->fd_ofiles[fd] = NULL;
+ p->p_fd->fd_ofileflags[fd] |= UF_RESERVED;
+}
- return (0);
+void
+procfdtbl_markclosefd(struct proc * p, int fd)
+{
+ p->p_fd->fd_ofileflags[fd] |= (UF_RESERVED | UF_CLOSING);
+}
+
+void
+procfdtbl_releasefd(struct proc * p, int fd, struct fileproc * fp)
+{
+ if (fp != NULL)
+ p->p_fd->fd_ofiles[fd] = fp;
+ p->p_fd->fd_ofileflags[fd] &= ~UF_RESERVED;
+ if ((p->p_fd->fd_ofileflags[fd] & UF_RESVWAIT) == UF_RESVWAIT) {
+ p->p_fd->fd_ofileflags[fd] &= ~UF_RESVWAIT;
+ wakeup(&p->p_fd);
+ }
+}
+
+void
+procfdtbl_waitfd(struct proc * p, int fd)
+{
+ p->p_fd->fd_ofileflags[fd] |= UF_RESVWAIT;
+ msleep(&p->p_fd, &p->p_fdmlock, PRIBIO, "ftbl_waitfd", NULL);
+}
+
+
+void
+procfdtbl_clearfd(struct proc * p, int fd)
+{
+ int waiting;
+
+ waiting = (p->p_fd->fd_ofileflags[fd] & UF_RESVWAIT);
+ p->p_fd->fd_ofiles[fd] = NULL;
+ p->p_fd->fd_ofileflags[fd] = 0;
+ if ( waiting == UF_RESVWAIT) {
+ wakeup(&p->p_fd);
+ }
}
-static __inline__ void
-_fdrelse(struct filedesc *fdp, int fd)
+/*
+ * _fdrelse
+ *
+ * Description: Inline utility function to free an fd in a filedesc
+ *
+ * Parameters: fdp Pointer to filedesc fd lies in
+ * fd fd to free
+ * reserv fd should be reserved
+ *
+ * Returns: void
+ *
+ * Locks: Assumes proc_fdlock for process pointing to fdp is held by
+ * the caller
+ */
+static void
+_fdrelse(struct proc * p, int fd)
{
+ struct filedesc *fdp = p->p_fd;
+ int nfd = 0;
+
if (fd < fdp->fd_freefile)
fdp->fd_freefile = fd;
#if DIAGNOSTIC
if (fd > fdp->fd_lastfile)
- panic("fdrelse: fd_lastfile inconsistent");
+ panic("fdrelse: fd_lastfile inconsistent");
#endif
- fdp->fd_ofiles[fd] = NULL;
- fdp->fd_ofileflags[fd] = 0;
+ procfdtbl_clearfd(p, fd);
- while ((fd = fdp->fd_lastfile) > 0 &&
- fdp->fd_ofiles[fd] == NULL &&
- !(fdp->fd_ofileflags[fd] & UF_RESERVED))
+ while ((nfd = fdp->fd_lastfile) > 0 &&
+ fdp->fd_ofiles[nfd] == NULL &&
+ !(fdp->fd_ofileflags[nfd] & UF_RESERVED))
fdp->fd_lastfile--;
}
+
/*
- * Duplicate a file descriptor.
+ * dup
+ *
+ * Description: Duplicate a file descriptor.
+ *
+ * Parameters: p Process performing the dup
+ * uap->fd The fd to dup
+ * retval Pointer to the call return area
+ *
+ * Returns: 0 Success
+ * !0 Errno
+ *
+ * Implicit returns:
+ * *retval (modified) The new descriptor
*/
-/* ARGSUSED */
int
-dup(p, uap, retval)
- struct proc *p;
- struct dup_args *uap;
- register_t *retval;
+dup(proc_t p, struct dup_args *uap, register_t *retval)
{
- register struct filedesc *fdp = p->p_fd;
- register int old = uap->fd;
+ struct filedesc *fdp = p->p_fd;
+ int old = uap->fd;
int new, error;
struct fileproc *fp;
return (error);
}
+
/*
- * Duplicate a file descriptor to a particular value.
+ * dup2
+ *
+ * Description: Duplicate a file descriptor to a particular value.
+ *
+ * Parameters: p Process performing the dup
+ * uap->fd The fd to dup
+ * uap->to The fd to dup it to
+ * retval Pointer to the call return area
+ *
+ * Returns: 0 Success
+ * !0 Errno
+ *
+ * Implicit returns:
+ * *retval (modified) The new descriptor
*/
-/* ARGSUSED */
int
-dup2(p, uap, retval)
- struct proc *p;
- struct dup2_args *uap;
- register_t *retval;
+dup2(proc_t p, struct dup2_args *uap, register_t *retval)
{
- register struct filedesc *fdp = p->p_fd;
- register int old = uap->from, new = uap->to;
+ struct filedesc *fdp = p->p_fd;
+ int old = uap->from, new = uap->to;
int i, error;
- struct fileproc *fp;
+ struct fileproc *fp, *nfp;
proc_fdlock(p);
+startover:
if ( (error = fp_lookup(p, old, &fp, 1)) ) {
proc_fdunlock(p);
return(error);
}
if (new < 0 ||
- new >= p->p_rlimit[RLIMIT_NOFILE].rlim_cur ||
+ (rlim_t)new >= p->p_rlimit[RLIMIT_NOFILE].rlim_cur ||
new >= maxfiles) {
fp_drop(p, old, fp, 1);
proc_fdunlock(p);
return (error);
}
if (new != i) {
- _fdrelse(fdp, i);
+ fdrelse(p, i);
goto closeit;
}
} else {
- struct fileproc **fpp;
- char flags;
closeit:
- flags = fdp->fd_ofileflags[new];
- if ((flags & (UF_RESERVED | UF_CLOSING)) == UF_RESERVED) {
+ while ((fdp->fd_ofileflags[new] & UF_RESERVED) == UF_RESERVED) {
+ fp_drop(p, old, fp, 1);
+ procfdtbl_waitfd(p, new);
+#if DIAGNOSTIC
+ proc_fdlock_assert(p, LCK_MTX_ASSERT_OWNED);
+#endif
+ goto startover;
+ }
+
+ if ((fdp->fd_ofiles[new] != NULL) && ((error = fp_lookup(p, new, &nfp, 1)) == 0)) {
fp_drop(p, old, fp, 1);
- proc_fdunlock(p);
- return (EBADF);
+ (void)close_internal_locked(p, new, nfp, FD_DUP2RESV);
+#if DIAGNOSTIC
+ proc_fdlock_assert(p, LCK_MTX_ASSERT_OWNED);
+#endif
+ procfdtbl_clearfd(p, new);
+ goto startover;
+ } else {
+#if DIAGNOSTIC
+ if (fdp->fd_ofiles[new] != NULL)
+ panic("dup2: unable to get ref on a fileproc %d\n", new);
+#endif
+ procfdtbl_reservefd(p, new);
}
- /*
- * dup2() must succeed even if the close has an error.
- */
- if (*(fpp = &fdp->fd_ofiles[new])) {
- struct fileproc *nfp = *fpp;
+#if DIAGNOSTIC
+ proc_fdlock_assert(p, LCK_MTX_ASSERT_OWNED);
+#endif
- close_internal(p, new, nfp, (CLOSEINT_LOCKED | CLOSEINT_WAITONCLOSE | CLOSEINT_NOFDRELSE | CLOSEINT_NOFDNOREF));
- *fpp = NULL;
- }
}
+#if DIAGNOSTIC
+ if (fdp->fd_ofiles[new] != 0)
+ panic("dup2-1: overwriting fd_ofiles with new %d\n", new);
+ if ((fdp->fd_ofileflags[new] & UF_RESERVED) == 0)
+ panic("dup2-1: unreserved fileflags with new %d\n", new);
+#endif
error = finishdup(p, fdp, old, new, retval);
fp_drop(p, old, fp, 1);
proc_fdunlock(p);
return(error);
}
+
+/*
+ * fcntl
+ *
+ * Description: The file control system call.
+ *
+ * Parameters: p Process performing the fcntl
+ * uap->fd The fd to operate against
+ * uap->cmd The command to perform
+ * uap->arg Pointer to the command argument
+ * retval Pointer to the call return area
+ *
+ * Returns: 0 Success
+ * !0 Errno (see fcntl_nocancel)
+ *
+ * Implicit returns:
+ * *retval (modified) fcntl return value (if any)
+ *
+ * Notes: This system call differs from fcntl_nocancel() in that it
+ * tests for cancellation prior to performing a potentially
+ * blocking operation.
+ */
+int
+fcntl(proc_t p, struct fcntl_args *uap, register_t *retval)
+{
+ __pthread_testcancel(1);
+ return(fcntl_nocancel(p, (struct fcntl_nocancel_args *)uap, retval));
+}
+
+
/*
- * The file control system call.
+ * fcntl_nocancel
+ *
+ * Description: A non-cancel-testing file control system call.
+ *
+ * Parameters: p Process performing the fcntl
+ * uap->fd The fd to operate against
+ * uap->cmd The command to perform
+ * uap->arg Pointer to the command argument
+ * retval Pointer to the call return area
+ *
+ * Returns: 0 Success
+ * EINVAL
+ * fp_lookup:EBADF Bad file descriptor
+ * [F_DUPFD]
+ * fdalloc:EMFILE
+ * fdalloc:ENOMEM
+ * finishdup:EBADF
+ * finishdup:ENOMEM
+ * [F_SETOWN]
+ * ESRCH
+ * [F_SETLK]
+ * EBADF
+ * EOVERFLOW
+ * copyin:EFAULT
+ * vnode_getwithref:???
+ * VNOP_ADVLOCK:???
+ * [F_GETLK]
+ * EBADF
+ * EOVERFLOW
+ * copyin:EFAULT
+ * copyout:EFAULT
+ * vnode_getwithref:???
+ * VNOP_ADVLOCK:???
+ * [F_PREALLOCATE]
+ * EBADF
+ * EINVAL
+ * copyin:EFAULT
+ * copyout:EFAULT
+ * vnode_getwithref:???
+ * VNOP_ALLOCATE:???
+ * [F_SETSIZE,F_RDADVISE]
+ * EBADF
+ * copyin:EFAULT
+ * vnode_getwithref:???
+ * [F_RDAHEAD,F_NOCACHE]
+ * EBADF
+ * vnode_getwithref:???
+ * [???]
+ *
+ * Implicit returns:
+ * *retval (modified) fcntl return value (if any)
*/
int
-fcntl(p, uap, retval)
- struct proc *p;
- struct fcntl_args *uap;
- register_t *retval;
+fcntl_nocancel(proc_t p, struct fcntl_nocancel_args *uap, register_t *retval)
{
int fd = uap->fd;
struct filedesc *fdp = p->p_fd;
struct fileproc *fp;
char *pop;
- struct vnode *vp;
+ struct vnode *vp = NULLVP; /* for AUDIT_ARG() at end */
int i, tmp, error, error2, flg = F_POSIX;
struct flock fl;
struct vfs_context context;
proc_fdunlock(p);
return(error);
}
- context.vc_proc = p;
+ context.vc_thread = current_thread();
context.vc_ucred = fp->f_cred;
if (proc_is64bit(p)) {
argp = uap->arg;
}
else {
- /* since the arg parameter is defined as a long but may be either
- * a long or a pointer we must take care to handle sign extension
- * issues. Our sys call munger will sign extend a long when we are
- * called from a 32-bit process. Since we can never have an address
- * greater than 32-bits from a 32-bit process we lop off the top
- * 32-bits to avoid getting the wrong address
+ /*
+ * Since the arg parameter is defined as a long but may be
+ * either a long or a pointer we must take care to handle
+ * sign extension issues. Our sys call munger will sign
+ * extend a long when we are called from a 32-bit process.
+ * Since we can never have an address greater than 32-bits
+ * from a 32-bit process we lop off the top 32-bits to avoid
+ * getting the wrong address
*/
argp = CAST_USER_ADDR_T(uap->arg);
}
pop = &fdp->fd_ofileflags[fd];
+#if CONFIG_MACF
+ error = mac_file_check_fcntl(proc_ucred(p), fp->f_fglob, uap->cmd,
+ uap->arg);
+ if (error)
+ goto out;
+#endif
+
switch (uap->cmd) {
case F_DUPFD:
tmp = CAST_DOWN(int, uap->arg);
fp->f_flag |= FFLAGS(tmp) & FCNTLFLAGS;
tmp = fp->f_flag & FNONBLOCK;
- error = fo_ioctl(fp, FIONBIO, (caddr_t)&tmp, p);
+ error = fo_ioctl(fp, FIONBIO, (caddr_t)&tmp, &context);
if (error)
goto out;
tmp = fp->f_flag & FASYNC;
- error = fo_ioctl(fp, FIOASYNC, (caddr_t)&tmp, p);
+ error = fo_ioctl(fp, FIOASYNC, (caddr_t)&tmp, &context);
if (!error)
goto out;
fp->f_flag &= ~FNONBLOCK;
tmp = 0;
- (void)fo_ioctl(fp, FIONBIO, (caddr_t)&tmp, p);
+ (void)fo_ioctl(fp, FIONBIO, (caddr_t)&tmp, &context);
goto out;
case F_GETOWN:
error = 0;
goto out;
}
- error = fo_ioctl(fp, (int)TIOCGPGRP, (caddr_t)retval, p);
+ error = fo_ioctl(fp, (int)TIOCGPGRP, (caddr_t)retval, &context);
*retval = -*retval;
goto out;
goto out;
}
if (fp->f_type == DTYPE_PIPE) {
- error = fo_ioctl(fp, (int)TIOCSPGRP, (caddr_t)&tmp, p);
+ error = fo_ioctl(fp, (int)TIOCSPGRP, (caddr_t)&tmp, &context);
goto out;
}
if (tmp <= 0) {
tmp = -tmp;
} else {
- struct proc *p1 = pfind(tmp);
+ proc_t p1 = proc_find(tmp);
if (p1 == 0) {
error = ESRCH;
goto out;
}
- tmp = (int)p1->p_pgrp->pg_id;
+ tmp = (int)p1->p_pgrpid;
+ proc_rele(p1);
}
- error = fo_ioctl(fp, (int)TIOCSPGRP, (caddr_t)&tmp, p);
+ error = fo_ioctl(fp, (int)TIOCSPGRP, (caddr_t)&tmp, &context);
goto out;
case F_SETLKW:
proc_fdunlock(p);
/* Copy in the lock structure */
- error = copyin(argp, (caddr_t)&fl, sizeof (fl));
+ error = copyin(argp, (caddr_t)&fl, sizeof(fl));
if (error) {
goto outdrop;
}
+
+ if ((fl.l_whence == SEEK_CUR) && (fl.l_start + offset < fl.l_start)) {
+ error = EOVERFLOW;
+ goto outdrop;
+ }
+
if ( (error = vnode_getwithref(vp)) ) {
goto outdrop;
}
if (fl.l_whence == SEEK_CUR)
fl.l_start += offset;
+#if CONFIG_MACF
+ error = mac_file_check_lock(proc_ucred(p), fp->f_fglob,
+ F_SETLK, &fl);
+ if (error) {
+ (void)vnode_put(vp);
+ goto outdrop;
+ }
+#endif
switch (fl.l_type) {
case F_RDLCK:
error = EBADF;
goto outdrop;
}
- p->p_flag |= P_ADVLOCK;
+ // XXX UInt32 unsafe for LP64 kernel
+ OSBitOrAtomic(P_LADVLOCK, (UInt32 *)&p->p_ladvflag);
error = VNOP_ADVLOCK(vp, (caddr_t)p, F_SETLK, &fl, flg, &context);
(void)vnode_put(vp);
goto outdrop;
error = EBADF;
goto outdrop;
}
- p->p_flag |= P_ADVLOCK;
+ // XXX UInt32 unsafe for LP64 kernel
+ OSBitOrAtomic(P_LADVLOCK, (UInt32 *)&p->p_ladvflag);
error = VNOP_ADVLOCK(vp, (caddr_t)p, F_SETLK, &fl, flg, &context);
(void)vnode_put(vp);
goto outdrop;
proc_fdunlock(p);
/* Copy in the lock structure */
- error = copyin(argp, (caddr_t)&fl, sizeof (fl));
+ error = copyin(argp, (caddr_t)&fl, sizeof(fl));
if (error)
goto outdrop;
+ /* Check starting byte and ending byte for EOVERFLOW in SEEK_CUR */
+ /* and ending byte for EOVERFLOW in SEEK_SET */
+ if (((fl.l_whence == SEEK_CUR) &&
+ ((fl.l_start + offset < fl.l_start) ||
+ ((fl.l_len > 0) && (fl.l_start+offset + fl.l_len - 1 < fl.l_start+offset)))) ||
+ ((fl.l_whence == SEEK_SET) && (fl.l_len > 0) && (fl.l_start + fl.l_len - 1 < fl.l_start)))
+ {
+ /* lf_advlock doesn't check start/end for F_GETLK if file has no locks */
+ error = EOVERFLOW;
+ goto outdrop;
+ }
+
+ if ((fl.l_whence == SEEK_SET) && (fl.l_start < 0)) {
+ error = EINVAL;
+ goto outdrop;
+ }
+
+ switch (fl.l_type) {
+ case F_RDLCK:
+ case F_UNLCK:
+ case F_WRLCK:
+ break;
+ default:
+ error = EINVAL;
+ goto outdrop;
+ }
+
+ switch (fl.l_whence) {
+ case SEEK_CUR:
+ case SEEK_SET:
+ case SEEK_END:
+ break;
+ default:
+ error = EINVAL;
+ goto outdrop;
+ }
+
if ( (error = vnode_getwithref(vp)) == 0 ) {
if (fl.l_whence == SEEK_CUR)
fl.l_start += offset;
+#if CONFIG_MACF
+ error = mac_file_check_lock(proc_ucred(p), fp->f_fglob,
+ F_GETLK, &fl);
+ if (error == 0)
+#endif
error = VNOP_ADVLOCK(vp, (caddr_t)p, F_GETLK, &fl, F_POSIX, &context);
(void)vnode_put(vp);
if (error == 0)
- error = copyout((caddr_t)&fl, argp, sizeof (fl));
+ error = copyout((caddr_t)&fl, argp, sizeof(fl));
}
goto outdrop;
goto outdrop;
}
- error = copyin(argp, (caddr_t)&alloc_struct, sizeof (alloc_struct));
+ error = copyin(argp, (caddr_t)&alloc_struct, sizeof(alloc_struct));
if (error)
goto outdrop;
&context);
(void)vnode_put(vp);
- error2 = copyout((caddr_t)&alloc_struct, argp, sizeof (alloc_struct));
+ error2 = copyout((caddr_t)&alloc_struct, argp, sizeof(alloc_struct));
if (error == 0)
error = error2;
error = EBADF;
goto out;
}
+ vp = (struct vnode *)fp->f_data;
proc_fdunlock(p);
error = copyin(argp, (caddr_t)&offset, sizeof (off_t));
if (error)
goto outdrop;
+ error = vnode_getwithref(vp);
+ if (error)
+ goto outdrop;
+
+#if CONFIG_MACF
+ error = mac_vnode_check_truncate(&context,
+ fp->f_fglob->fg_cred, vp);
+ if (error) {
+ (void)vnode_put(vp);
+ goto outdrop;
+ }
+#endif
/*
* Make sure that we are root. Growing a file
* without zero filling the data is a security hole
* root would have access anyway so we'll allow it
*/
-
if (!is_suser()) {
error = EACCES;
- goto outdrop;
- }
- vp = (struct vnode *)fp->f_data;
-
- if ( (error = vnode_getwithref(vp)) == 0 ) {
- /*
+ } else {
+ /*
* set the file size
*/
- error = vnode_setsize(vp, offset, IO_NOZEROFILL, &context);
-
- (void)vnode_put(vp);
+ error = vnode_setsize(vp, offset, IO_NOZEROFILL,
+ &context);
}
+
+ (void)vnode_put(vp);
goto outdrop;
case F_RDAHEAD:
error = EBADF;
goto out;
}
+ if (uap->arg)
+ fp->f_fglob->fg_flag &= ~FNORDAHEAD;
+ else
+ fp->f_fglob->fg_flag |= FNORDAHEAD;
+
+ goto out;
+
+ case F_NOCACHE:
+ if (fp->f_type != DTYPE_VNODE) {
+ error = EBADF;
+ goto out;
+ }
+ if (uap->arg)
+ fp->f_fglob->fg_flag |= FNOCACHE;
+ else
+ fp->f_fglob->fg_flag &= ~FNOCACHE;
+
+ goto out;
+
+ case F_GLOBAL_NOCACHE:
+ if (fp->f_type != DTYPE_VNODE) {
+ error = EBADF;
+ goto out;
+ }
vp = (struct vnode *)fp->f_data;
proc_fdunlock(p);
- if ( (error = vnode_getwithref(vp)) == 0) {
- if (uap->arg)
- vnode_clearnoreadahead(vp);
+ if ( (error = vnode_getwithref(vp)) == 0 ) {
+
+ *retval = vnode_isnocache(vp);
+
+ if (uap->arg)
+ vnode_setnocache(vp);
else
- vnode_setnoreadahead(vp);
+ vnode_clearnocache(vp);
(void)vnode_put(vp);
}
goto outdrop;
- case F_NOCACHE:
- if (fp->f_type != DTYPE_VNODE) {
- error = EBADF;
+ case F_CHECK_OPENEVT:
+ if (fp->f_type != DTYPE_VNODE) {
+ error = EBADF;
goto out;
}
vp = (struct vnode *)fp->f_data;
proc_fdunlock(p);
if ( (error = vnode_getwithref(vp)) == 0 ) {
- if (uap->arg)
- vnode_setnocache(vp);
+
+ *retval = vnode_is_openevt(vp);
+
+ if (uap->arg)
+ vnode_set_openevt(vp);
else
- vnode_clearnocache(vp);
+ vnode_clear_openevt(vp);
(void)vnode_put(vp);
}
vp = (struct vnode *)fp->f_data;
proc_fdunlock(p);
- if ( (error = copyin(argp, (caddr_t)&ra_struct, sizeof (ra_struct))) )
+ if ( (error = copyin(argp, (caddr_t)&ra_struct, sizeof(ra_struct))) )
goto outdrop;
if ( (error = vnode_getwithref(vp)) == 0 ) {
error = VNOP_IOCTL(vp, F_RDADVISE, (caddr_t)&ra_struct, 0, &context);
goto outdrop;
}
}
- if (strcmp(vnode_mount(vp)->mnt_vfsstat.f_fstypename, "hfs") != 0) {
+ if (strncmp(vnode_mount(vp)->mnt_vfsstat.f_fstypename, "hfs",
+ sizeof(vnode_mount(vp)->mnt_vfsstat.f_fstypename)) != 0) {
error = EINVAL;
} else {
/*
l2p_struct.l2p_contigbytes = 0; /* for now */
l2p_struct.l2p_devoffset = bn * devBlockSize;
l2p_struct.l2p_devoffset += fp->f_offset - offset;
- error = copyout((caddr_t)&l2p_struct, argp, sizeof (l2p_struct));
+ error = copyout((caddr_t)&l2p_struct, argp, sizeof(l2p_struct));
}
goto outdrop;
}
}
break;
}
-
- default:
- if (uap->cmd < FCNTL_FS_SPECIFIC_BASE) {
- error = EINVAL;
- goto out;
- }
-
- // if it's a fs-specific fcntl() then just pass it through
- if (fp->f_type != DTYPE_VNODE) {
+ /*
+ * SPI (private) for opening a file starting from a dir fd
+ */
+ case F_OPENFROM: {
+ struct user_fopenfrom fopen;
+ struct vnode_attr va;
+ struct nameidata nd;
+ int cmode;
+
+ /* Check if this isn't a valid file descriptor */
+ if ((fp->f_type != DTYPE_VNODE) ||
+ (fp->f_flag & FREAD) == 0) {
error = EBADF;
goto out;
}
vp = (struct vnode *)fp->f_data;
proc_fdunlock(p);
- if ( (error = vnode_getwithref(vp)) == 0 ) {
- error = VNOP_IOCTL(vp, uap->cmd, CAST_DOWN(caddr_t, argp), 0, &context);
+ if (vnode_getwithref(vp)) {
+ error = ENOENT;
+ goto outdrop;
+ }
+
+ /* Only valid for directories */
+ if (vp->v_type != VDIR) {
+ vnode_put(vp);
+ error = ENOTDIR;
+ goto outdrop;
+ }
- (void)vnode_put(vp);
+ /* Get flags, mode and pathname arguments. */
+ if (IS_64BIT_PROCESS(p)) {
+ error = copyin(argp, &fopen, sizeof(fopen));
+ } else {
+ struct fopenfrom fopen32;
+
+ error = copyin(argp, &fopen32, sizeof(fopen32));
+ fopen.o_flags = fopen32.o_flags;
+ fopen.o_mode = fopen32.o_mode;
+ fopen.o_pathname = CAST_USER_ADDR_T(fopen32.o_pathname);
+ }
+ if (error) {
+ vnode_put(vp);
+ goto outdrop;
}
+ VATTR_INIT(&va);
+ /* Mask off all but regular access permissions */
+ cmode = ((fopen.o_mode &~ fdp->fd_cmask) & ALLPERMS) & ~S_ISTXT;
+ VATTR_SET(&va, va_mode, cmode & ACCESSPERMS);
+
+ /* Start the lookup relative to the file descriptor's vnode. */
+ NDINIT(&nd, LOOKUP, USEDVP | FOLLOW | AUDITVNPATH1, UIO_USERSPACE,
+ fopen.o_pathname, &context);
+ nd.ni_dvp = vp;
+
+ error = open1(&context, &nd, fopen.o_flags, &va, retval);
+
+ vnode_put(vp);
break;
-
}
+ /*
+ * SPI (private) for unlinking a file starting from a dir fd
+ */
+ case F_UNLINKFROM: {
+ struct nameidata nd;
+ user_addr_t pathname;
+
+ /* Check if this isn't a valid file descriptor */
+ if ((fp->f_type != DTYPE_VNODE) ||
+ (fp->f_flag & FREAD) == 0) {
+ error = EBADF;
+ goto out;
+ }
+ vp = (struct vnode *)fp->f_data;
+ proc_fdunlock(p);
+
+ if (vnode_getwithref(vp)) {
+ error = ENOENT;
+ goto outdrop;
+ }
+
+ /* Only valid for directories */
+ if (vp->v_type != VDIR) {
+ vnode_put(vp);
+ error = ENOTDIR;
+ goto outdrop;
+ }
+
+ /* Get flags, mode and pathname arguments. */
+ if (IS_64BIT_PROCESS(p)) {
+ pathname = (user_addr_t)argp;
+ } else {
+ pathname = CAST_USER_ADDR_T(argp);
+ }
+
+ /* Start the lookup relative to the file descriptor's vnode. */
+ NDINIT(&nd, DELETE, USEDVP | AUDITVNPATH1, UIO_USERSPACE, pathname, &context);
+ nd.ni_dvp = vp;
+
+ error = unlink1(&context, &nd, 0);
+
+ vnode_put(vp);
+ break;
+
+ }
+
+ case F_ADDSIGS: {
+ struct user_fsignatures fs;
+ kern_return_t kr;
+ vm_address_t kernel_blob_addr;
+ vm_size_t kernel_blob_size;
+
+ if (fp->f_type != DTYPE_VNODE) {
+ error = EBADF;
+ goto out;
+ }
+ vp = (struct vnode *)fp->f_data;
+ proc_fdunlock(p);
+ error = vnode_getwithref(vp);
+ if (error)
+ goto outdrop;
+
+ if (IS_64BIT_PROCESS(p)) {
+ error = copyin(argp, &fs, sizeof (fs));
+ } else {
+ struct fsignatures fs32;
+
+ error = copyin(argp, &fs32, sizeof (fs32));
+ fs.fs_file_start = fs32.fs_file_start;
+ fs.fs_blob_start = CAST_USER_ADDR_T(fs32.fs_blob_start);
+ fs.fs_blob_size = fs32.fs_blob_size;
+ }
+
+ if (error) {
+ vnode_put(vp);
+ goto outdrop;
+ }
+
+#define CS_MAX_BLOB_SIZE (1ULL * 1024 * 1024) /* XXX ? */
+ if (fs.fs_blob_size > CS_MAX_BLOB_SIZE) {
+ error = E2BIG;
+ vnode_put(vp);
+ goto outdrop;
+ }
+
+ kernel_blob_size = CAST_DOWN(vm_size_t, fs.fs_blob_size);
+ kr = kmem_alloc(kernel_map,
+ &kernel_blob_addr,
+ kernel_blob_size);
+ if (kr != KERN_SUCCESS) {
+ error = ENOMEM;
+ vnode_put(vp);
+ goto outdrop;
+ }
+
+ error = copyin(fs.fs_blob_start,
+ (void *) kernel_blob_addr,
+ kernel_blob_size);
+ if (error) {
+ kmem_free(kernel_map,
+ kernel_blob_addr,
+ kernel_blob_size);
+ vnode_put(vp);
+ goto outdrop;
+ }
+
+ error = ubc_cs_blob_add(
+ vp,
+ CPU_TYPE_ANY, /* not for a specific architecture */
+ fs.fs_file_start,
+ kernel_blob_addr,
+ kernel_blob_size);
+ if (error) {
+ kmem_free(kernel_map,
+ kernel_blob_addr,
+ kernel_blob_size);
+ } else {
+ /* ubc_blob_add() was consumed "kernel_blob_addr" */
+ }
+
+ (void) vnode_put(vp);
+ break;
+ }
+
+ case F_MARKDEPENDENCY: {
+ struct vnode *root_vp;
+ struct vnode_attr va;
+ vfs_context_t ctx = vfs_context_current();
+ kauth_cred_t cred;
+
+ if ((current_proc()->p_flag & P_DEPENDENCY_CAPABLE) == 0) {
+ error = EPERM;
+ goto out;
+ }
+
+ if (fp->f_type != DTYPE_VNODE) {
+ error = EBADF;
+ goto out;
+ }
+
+ vp = (struct vnode *)fp->f_data;
+ proc_fdunlock(p);
+
+ if (vnode_getwithref(vp)) {
+ error = ENOENT;
+ goto outdrop;
+ }
+
+ // the passed in vnode must be the root dir of the file system
+ if (VFS_ROOT(vp->v_mount, &root_vp, ctx) != 0 || vp != root_vp) {
+ error = EINVAL;
+ vnode_put(vp);
+ goto outdrop;
+ }
+ vnode_put(root_vp);
+
+ // get the owner of the root dir
+ VATTR_INIT(&va);
+ VATTR_WANTED(&va, va_uid);
+ if (vnode_getattr(vp, &va, ctx) != 0) {
+ error = EINVAL;
+ vnode_put(vp);
+ goto outdrop;
+ }
+
+ // and last, check that the caller is the super user or
+ // the owner of the mount point
+ cred = vfs_context_ucred(ctx);
+ if (!is_suser() && va.va_uid != kauth_cred_getuid(cred)) {
+ error = EACCES;
+ vnode_put(vp);
+ goto outdrop;
+ }
+
+ // if all those checks pass then we can mark the dependency
+ vfs_markdependency(vp->v_mount);
+ error = 0;
+
+ vnode_put(vp);
+
+ break;
+ }
+
+ default:
+ if (uap->cmd < FCNTL_FS_SPECIFIC_BASE) {
+ error = EINVAL;
+ goto out;
+ }
+
+ // if it's a fs-specific fcntl() then just pass it through
+
+ if (fp->f_type != DTYPE_VNODE) {
+ error = EBADF;
+ goto out;
+ }
+ vp = (struct vnode *)fp->f_data;
+ proc_fdunlock(p);
+
+ if ( (error = vnode_getwithref(vp)) == 0 ) {
+ error = VNOP_IOCTL(vp, uap->cmd, CAST_DOWN(caddr_t, argp), 0, &context);
+
+ (void)vnode_put(vp);
+ }
+ break;
+
+ }
+
+outdrop:
+ AUDIT_ARG(vnpath_withref, vp, ARG_VNODE1);
+ fp_drop(p, fd, fp, 0);
+ return(error);
+out:
+ fp_drop(p, fd, fp, 1);
+ proc_fdunlock(p);
+ return(error);
+}
+
-outdrop:
- AUDIT_ARG(vnpath_withref, vp, ARG_VNODE1);
- fp_drop(p, fd, fp, 0);
- return(error);
-out:
- fp_drop(p, fd, fp, 1);
- proc_fdunlock(p);
- return(error);
-}
-
/*
- * Common code for dup, dup2, and fcntl(F_DUPFD).
+ * finishdup
+ *
+ * Description: Common code for dup, dup2, and fcntl(F_DUPFD).
+ *
+ * Parameters: p Process performing the dup
+ * old The fd to dup
+ * new The fd to dup it to
+ * retval Pointer to the call return area
+ *
+ * Returns: 0 Success
+ * EBADF
+ * ENOMEM
+ *
+ * Implicit returns:
+ * *retval (modified) The new descriptor
+ *
+ * Locks: Assumes proc_fdlock for process pointing to fdp is held by
+ * the caller
+ *
+ * Notes: This function may drop and reacquire this lock; it is unsafe
+ * for a caller to assume that other state protected by the lock
+ * has not been subsequently changes out from under it.
*/
int
-finishdup(struct proc * p, struct filedesc *fdp, int old, int new, register_t *retval)
+finishdup(proc_t p, struct filedesc *fdp, int old, int new, register_t *retval)
{
struct fileproc *nfp;
struct fileproc *ofp;
+#if CONFIG_MACF
+ int error;
+#endif
+
+#if DIAGNOSTIC
+ proc_fdlock_assert(p, LCK_MTX_ASSERT_OWNED);
+#endif
if ((ofp = fdp->fd_ofiles[old]) == NULL ||
(fdp->fd_ofileflags[old] & UF_RESERVED)) {
- _fdrelse(fdp, new);
+ fdrelse(p, new);
return (EBADF);
}
fg_ref(ofp);
+
+#if CONFIG_MACF
+ error = mac_file_check_dup(proc_ucred(p), ofp->f_fglob, new);
+ if (error) {
+ fg_drop(ofp);
+ fdrelse(p, new);
+ return (error);
+ }
+#endif
+
proc_fdunlock(p);
MALLOC_ZONE(nfp, struct fileproc *, sizeof(struct fileproc), M_FILEPROC, M_WAITOK);
- bzero(nfp, sizeof(struct fileproc));
+ /* Failure check follows proc_fdlock() due to handling requirements */
proc_fdlock(p);
- nfp->f_flags = ofp->f_flags;
+
+ if (nfp == NULL) {
+ fg_drop(ofp);
+ fdrelse(p, new);
+ return (ENOMEM);
+ }
+
+ bzero(nfp, sizeof(struct fileproc));
+
+ nfp->f_flags = 0;
nfp->f_fglob = ofp->f_fglob;
nfp->f_iocount = 0;
- fdp->fd_ofiles[new] = nfp;
- fdp->fd_ofileflags[new] = fdp->fd_ofileflags[old] &~ UF_EXCLOSE;
+#if DIAGNOSTIC
+ if (fdp->fd_ofiles[new] != 0)
+ panic("finishdup: overwriting fd_ofiles with new %d\n", new);
+ if ((fdp->fd_ofileflags[new] & UF_RESERVED) == 0)
+ panic("finishdup: unreserved fileflags with new %d\n", new);
+#endif
+
if (new > fdp->fd_lastfile)
fdp->fd_lastfile = new;
+ procfdtbl_releasefd(p, new, nfp);
*retval = new;
return (0);
}
+/*
+ * close
+ *
+ * Description: The implementation of the close(2) system call
+ *
+ * Parameters: p Process in whose per process file table
+ * the close is to occur
+ * uap->fd fd to be closed
+ * retval <unused>
+ *
+ * Returns: 0 Success
+ * fp_lookup:EBADF Bad file descriptor
+ * close_internal:EBADF
+ * close_internal:??? Anything returnable by a per-fileops
+ * close function
+ */
+int
+close(proc_t p, struct close_args *uap, register_t *retval)
+{
+ __pthread_testcancel(1);
+ return(close_nocancel(p, (struct close_nocancel_args *)uap, retval));
+}
+
+
int
-close(struct proc *p, struct close_args *uap, __unused register_t *retval)
+close_nocancel(proc_t p, struct close_nocancel_args *uap, __unused register_t *retval)
{
struct fileproc *fp;
int fd = uap->fd;
return(error);
}
- error = close_internal(p, fd, fp, CLOSEINT_LOCKED | CLOSEINT_WAITONCLOSE);
+ error = close_internal_locked(p, fd, fp, 0);
proc_fdunlock(p);
/*
+ * close_internal_locked
+ *
* Close a file descriptor.
+ *
+ * Parameters: p Process in whose per process file table
+ * the close is to occur
+ * fd fd to be closed
+ * fp fileproc associated with the fd
+ *
+ * Returns: 0 Success
+ * EBADF fd already in close wait state
+ * closef_locked:??? Anything returnable by a per-fileops
+ * close function
+ *
+ * Locks: Assumes proc_fdlock for process is held by the caller and returns
+ * with lock held
+ *
+ * Notes: This function may drop and reacquire this lock; it is unsafe
+ * for a caller to assume that other state protected by the lock
+ * has not been subsequently changes out from under it, if the
+ * caller made the call with the lock held.
*/
-int
-close_internal(struct proc *p, int fd, struct fileproc *fp, int flags)
+static int
+close_internal_locked(proc_t p, int fd, struct fileproc *fp, int flags)
{
struct filedesc *fdp = p->p_fd;
int error =0;
- int locked = flags & CLOSEINT_LOCKED;
- int waitonclose = flags & CLOSEINT_WAITONCLOSE;
- int norelse = flags & CLOSEINT_NOFDRELSE;
- int nofdref = flags & CLOSEINT_NOFDNOREF;
- int slpstate = PRIBIO;
+ int resvfd = flags & FD_DUP2RESV;
- if (!locked)
- proc_fdlock(p);
- /* Keep people from using the filedesc while we are closing it */
- fdp->fd_ofileflags[fd] |= UF_RESERVED;
+#if DIAGNOSTIC
+ proc_fdlock_assert(p, LCK_MTX_ASSERT_OWNED);
+#endif
- fdp->fd_ofileflags[fd] |= UF_CLOSING;
+ /* Keep people from using the filedesc while we are closing it */
+ procfdtbl_markclosefd(p, fd);
- if ((waitonclose && ((fp->f_flags & FP_CLOSING) == FP_CLOSING))) {
- if (nofdref == 0)
- fp_drop(p, fd, fp, 1);
- fp->f_flags |= FP_WAITCLOSE;
- if (!locked)
- slpstate |= PDROP;
- msleep(&fp->f_flags, &p->p_fdmlock, slpstate, "close wait",0) ;
- return(EBADF);
+ if ((fp->f_flags & FP_CLOSING) == FP_CLOSING) {
+ panic("close_internal_locked: being called on already closing fd\n");
}
+
+#if DIAGNOSTIC
+ if ((fdp->fd_ofileflags[fd] & UF_RESERVED) == 0)
+ panic("close_internal: unreserved fileflags with fd %d\n", fd);
+#endif
+
fp->f_flags |= FP_CLOSING;
- if (nofdref)
- fp->f_iocount++;
if ( (fp->f_flags & FP_AIOISSUED) || kauth_authorize_fileop_has_listeners() ) {
if ((fp->f_flags & FP_INCHRREAD) == 0)
fileproc_drain(p, fp);
- if (norelse == 0)
- _fdrelse(fdp, fd);
+
+ if (resvfd == 0)
+ _fdrelse(p, fd);
+
error = closef_locked(fp, fp->f_fglob, p);
if ((fp->f_flags & FP_WAITCLOSE) == FP_WAITCLOSE)
wakeup(&fp->f_flags);
fp->f_flags &= ~(FP_WAITCLOSE | FP_CLOSING);
- if (!locked)
- proc_fdunlock(p);
+ proc_fdunlock(p);
+
+ FREE_ZONE(fp, sizeof(*fp), M_FILEPROC);
+
+ proc_fdlock(p);
+
+#if DIAGNOSTIC
+ if (resvfd != 0) {
+ if ((fdp->fd_ofileflags[fd] & UF_RESERVED) == 0)
+ panic("close with reserved fd returns with freed fd:%d: proc: %x\n", fd, (unsigned int)p);
+ }
+#endif
- FREE_ZONE(fp, sizeof *fp, M_FILEPROC);
return(error);
}
+
/*
- * Return status information about a file descriptor.
+ * fstat1
+ *
+ * Description: Return status information about a file descriptor.
+ *
+ * Parameters: p The process doing the fstat
+ * fd The fd to stat
+ * ub The user stat buffer
+ * xsecurity The user extended security
+ * buffer, or 0 if none
+ * xsecurity_size The size of xsecurity, or 0
+ * if no xsecurity
+ * isstat64 Flag to indicate 64 bit version
+ * for inode size, etc.
*
- * XXX switch on node type is bogus; need a stat in struct fileops instead.
+ * Returns: 0 Success
+ * EBADF
+ * EFAULT
+ * fp_lookup:EBADF Bad file descriptor
+ * vnode_getwithref:???
+ * copyout:EFAULT
+ * vnode_getwithref:???
+ * vn_stat:???
+ * soo_stat:???
+ * pipe_stat:???
+ * pshm_stat:???
+ * kqueue_stat:???
+ *
+ * Notes: Internal implementation for all other fstat() related
+ * functions
+ *
+ * XXX switch on node type is bogus; need a stat in struct
+ * XXX fileops instead.
*/
static int
-fstat1(struct proc *p, int fd, user_addr_t ub, user_addr_t xsecurity, user_addr_t xsecurity_size)
+fstat1(proc_t p, int fd, user_addr_t ub, user_addr_t xsecurity, user_addr_t xsecurity_size, int isstat64)
{
struct fileproc *fp;
struct stat sb;
+ struct stat64 sb64;
struct user_stat user_sb;
+ struct user_stat64 user_sb64;
int error, my_size;
int funnel_state;
- short type;
+ file_type_t type;
caddr_t data;
kauth_filesec_t fsec;
- ssize_t xsecurity_bufsize;
- int entrycount;
- struct vfs_context context;
+ user_size_t xsecurity_bufsize;
+ vfs_context_t ctx = vfs_context_current();
+ void * sbptr;
AUDIT_ARG(fd, fd);
- if ((error = fp_lookup(p, fd, &fp, 0)) != 0)
+ if ((error = fp_lookup(p, fd, &fp, 0)) != 0) {
return(error);
+ }
type = fp->f_type;
data = fp->f_data;
fsec = KAUTH_FILESEC_NONE;
+ sbptr = (isstat64 != 0) ? (void *)&sb64: (void *)&sb;
+
switch (type) {
case DTYPE_VNODE:
- context.vc_proc = current_proc();
- context.vc_ucred = kauth_cred_get();
if ((error = vnode_getwithref((vnode_t)data)) == 0) {
/*
- * If the caller has the file open, and is not requesting extended security,
- * we are going to let them get the basic stat information.
+ * If the caller has the file open, and is not
+ * requesting extended security information, we are
+ * going to let them get the basic stat information.
*/
if (xsecurity == USER_ADDR_NULL) {
- error = vn_stat_noauth((vnode_t)data, &sb, NULL, &context);
+ error = vn_stat_noauth((vnode_t)data, sbptr, NULL, isstat64, ctx);
} else {
- error = vn_stat((vnode_t)data, &sb, &fsec, &context);
+ error = vn_stat((vnode_t)data, sbptr, &fsec, isstat64, ctx);
}
AUDIT_ARG(vnpath, (struct vnode *)data, ARG_VNODE1);
}
break;
+#if SOCKETS
case DTYPE_SOCKET:
- error = soo_stat((struct socket *)data, &sb);
+ error = soo_stat((struct socket *)data, sbptr, isstat64);
break;
+#endif /* SOCKETS */
case DTYPE_PIPE:
- error = pipe_stat((void *)data, &sb);
+ error = pipe_stat((void *)data, sbptr, isstat64);
break;
case DTYPE_PSXSHM:
- error = pshm_stat((void *)data, &sb);
+ error = pshm_stat((void *)data, sbptr, isstat64);
break;
case DTYPE_KQUEUE:
funnel_state = thread_funnel_set(kernel_flock, TRUE);
- error = kqueue_stat(fp, &sb, p);
+ error = kqueue_stat(fp, sbptr, isstat64, p);
thread_funnel_set(kernel_flock, funnel_state);
break;
error = EBADF;
goto out;
}
- /* Zap spare fields */
- sb.st_lspare = 0;
- sb.st_qspare[0] = 0LL;
- sb.st_qspare[1] = 0LL;
if (error == 0) {
caddr_t sbp;
- if (IS_64BIT_PROCESS(current_proc())) {
- munge_stat(&sb, &user_sb);
- my_size = sizeof(user_sb);
- sbp = (caddr_t)&user_sb;
- }
- else {
- my_size = sizeof(sb);
- sbp = (caddr_t)&sb;
+
+ if (isstat64 != 0) {
+ sb64.st_lspare = 0;
+ sb64.st_qspare[0] = 0LL;
+ sb64.st_qspare[1] = 0LL;
+ if (IS_64BIT_PROCESS(current_proc())) {
+ munge_stat64(&sb64, &user_sb64);
+ my_size = sizeof(user_sb64);
+ sbp = (caddr_t)&user_sb64;
+ } else {
+ my_size = sizeof(sb64);
+ sbp = (caddr_t)&sb64;
+ }
+ } else {
+ sb.st_lspare = 0;
+ sb.st_qspare[0] = 0LL;
+ sb.st_qspare[1] = 0LL;
+ if (IS_64BIT_PROCESS(current_proc())) {
+ munge_stat(&sb, &user_sb);
+ my_size = sizeof(user_sb);
+ sbp = (caddr_t)&user_sb;
+ } else {
+ my_size = sizeof(sb);
+ sbp = (caddr_t)&sb;
+ }
}
+
error = copyout(sbp, ub, my_size);
}
return (error);
}
+
+/*
+ * fstat_extended
+ *
+ * Description: Extended version of fstat supporting returning extended
+ * security information
+ *
+ * Parameters: p The process doing the fstat
+ * uap->fd The fd to stat
+ * uap->ub The user stat buffer
+ * uap->xsecurity The user extended security
+ * buffer, or 0 if none
+ * uap->xsecurity_size The size of xsecurity, or 0
+ *
+ * Returns: 0 Success
+ * !0 Errno (see fstat1)
+ */
+int
+fstat_extended(proc_t p, struct fstat_extended_args *uap, __unused register_t *retval)
+{
+ return(fstat1(p, uap->fd, uap->ub, uap->xsecurity, uap->xsecurity_size, 0));
+}
+
+
+/*
+ * fstat
+ *
+ * Description: Get file status for the file associated with fd
+ *
+ * Parameters: p The process doing the fstat
+ * uap->fd The fd to stat
+ * uap->ub The user stat buffer
+ *
+ * Returns: 0 Success
+ * !0 Errno (see fstat1)
+ */
+int
+fstat(proc_t p, register struct fstat_args *uap, __unused register_t *retval)
+{
+ return(fstat1(p, uap->fd, uap->ub, 0, 0, 0));
+}
+
+
+/*
+ * fstat64_extended
+ *
+ * Description: Extended version of fstat64 supporting returning extended
+ * security information
+ *
+ * Parameters: p The process doing the fstat
+ * uap->fd The fd to stat
+ * uap->ub The user stat buffer
+ * uap->xsecurity The user extended security
+ * buffer, or 0 if none
+ * uap->xsecurity_size The size of xsecurity, or 0
+ *
+ * Returns: 0 Success
+ * !0 Errno (see fstat1)
+ */
int
-fstat_extended(struct proc *p, struct fstat_extended_args *uap, __unused register_t *retval)
+fstat64_extended(proc_t p, struct fstat64_extended_args *uap, __unused register_t *retval)
{
- return(fstat1(p, uap->fd, uap->ub, uap->xsecurity, uap->xsecurity_size));
+ return(fstat1(p, uap->fd, uap->ub, uap->xsecurity, uap->xsecurity_size, 1));
}
+
+/*
+ * fstat64
+ *
+ * Description: Get 64 bit version of the file status for the file associated
+ * with fd
+ *
+ * Parameters: p The process doing the fstat
+ * uap->fd The fd to stat
+ * uap->ub The user stat buffer
+ *
+ * Returns: 0 Success
+ * !0 Errno (see fstat1)
+ */
int
-fstat(struct proc *p, register struct fstat_args *uap, __unused register_t *retval)
+fstat64(proc_t p, register struct fstat64_args *uap, __unused register_t *retval)
{
- return(fstat1(p, uap->fd, uap->ub, 0, 0));
+ return(fstat1(p, uap->fd, uap->ub, 0, 0, 1));
}
+
/*
- * Return pathconf information about a file descriptor.
+ * fpathconf
+ *
+ * Description: Return pathconf information about a file descriptor.
+ *
+ * Parameters: p Process making the request
+ * uap->fd fd to get information about
+ * uap->name Name of information desired
+ * retval Pointer to the call return area
+ *
+ * Returns: 0 Success
+ * EINVAL
+ * fp_lookup:EBADF Bad file descriptor
+ * vnode_getwithref:???
+ * vn_pathconf:???
+ *
+ * Implicit returns:
+ * *retval (modified) Returned information (numeric)
*/
int
-fpathconf(p, uap, retval)
- struct proc *p;
- register struct fpathconf_args *uap;
- register_t *retval;
+fpathconf(proc_t p, struct fpathconf_args *uap, register_t *retval)
{
int fd = uap->fd;
struct fileproc *fp;
struct vnode *vp;
- struct vfs_context context;
int error = 0;
- short type;
+ file_type_t type;
caddr_t data;
if ( (error = vnode_getwithref(vp)) == 0) {
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
- context.vc_proc = p;
- context.vc_ucred = kauth_cred_get();
-
- error = vn_pathconf(vp, uap->name, retval, &context);
+ error = vn_pathconf(vp, uap->name, retval, vfs_context_current());
(void)vnode_put(vp);
}
goto out;
case DTYPE_PSXSHM:
+ case DTYPE_PSXSEM:
case DTYPE_KQUEUE:
+ case DTYPE_FSEVENTS:
error = EINVAL;
goto out;
- default:
- panic("fpathconf (unrecognized - %d)", type);
}
/*NOTREACHED*/
out:
}
/*
- * Allocate a file descriptor for the process.
+ * Statistics counter for the number of times a process calling fdalloc()
+ * has resulted in an expansion of the per process open file table.
+ *
+ * XXX This would likely be of more use if it were per process
*/
int fdexpand;
+
+/*
+ * fdalloc
+ *
+ * Description: Allocate a file descriptor for the process.
+ *
+ * Parameters: p Process to allocate the fd in
+ * want The fd we would prefer to get
+ * result Pointer to fd we got
+ *
+ * Returns: 0 Success
+ * EMFILE
+ * ENOMEM
+ *
+ * Implicit returns:
+ * *result (modified) The fd which was allocated
+ */
int
-fdalloc(p, want, result)
- struct proc *p;
- int want;
- int *result;
+fdalloc(proc_t p, int want, int *result)
{
- register struct filedesc *fdp = p->p_fd;
- register int i;
+ struct filedesc *fdp = p->p_fd;
+ int i;
int lim, last, numfiles, oldnfiles;
struct fileproc **newofiles, **ofiles;
- char *newofileflags, *ofileflags;
+ char *newofileflags;
/*
* Search for a free descriptor starting at the higher
* of want or fd_freefile. If that fails, consider
* expanding the ofile array.
*/
+#if DIAGNOSTIC
+ proc_fdlock_assert(p, LCK_MTX_ASSERT_OWNED);
+#endif
+
lim = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfiles);
for (;;) {
last = min(fdp->fd_nfiles, lim);
if ((i = want) < fdp->fd_freefile)
i = fdp->fd_freefile;
- ofiles = &fdp->fd_ofiles[i];
- ofileflags = &fdp->fd_ofileflags[i];
for (; i < last; i++) {
- if (*ofiles == NULL && !(*ofileflags & UF_RESERVED)) {
- *ofileflags = UF_RESERVED;
+ if (fdp->fd_ofiles[i] == NULL && !(fdp->fd_ofileflags[i] & UF_RESERVED)) {
+ procfdtbl_reservefd(p, i);
if (i > fdp->fd_lastfile)
fdp->fd_lastfile = i;
if (want <= fdp->fd_freefile)
*result = i;
return (0);
}
- ofiles++; ofileflags++;
}
/*
*/
oldnfiles = fdp->fd_nfiles;
(void) memcpy(newofiles, fdp->fd_ofiles,
- oldnfiles * sizeof *fdp->fd_ofiles);
+ oldnfiles * sizeof(*fdp->fd_ofiles));
(void) memset(&newofiles[oldnfiles], 0,
- (numfiles - oldnfiles) * sizeof *fdp->fd_ofiles);
+ (numfiles - oldnfiles) * sizeof(*fdp->fd_ofiles));
(void) memcpy(newofileflags, fdp->fd_ofileflags,
- oldnfiles * sizeof *fdp->fd_ofileflags);
+ oldnfiles * sizeof(*fdp->fd_ofileflags));
(void) memset(&newofileflags[oldnfiles], 0,
(numfiles - oldnfiles) *
- sizeof *fdp->fd_ofileflags);
+ sizeof(*fdp->fd_ofileflags));
ofiles = fdp->fd_ofiles;
fdp->fd_ofiles = newofiles;
fdp->fd_ofileflags = newofileflags;
}
}
+
/*
- * Check to see whether n user file descriptors
- * are available to the process p.
+ * fdavail
+ *
+ * Description: Check to see whether n user file descriptors are available
+ * to the process p.
+ *
+ * Parameters: p Process to check in
+ * n The number of fd's desired
+ *
+ * Returns: 0 No
+ * 1 Yes
+ *
+ * Locks: Assumes proc_fdlock for process is held by the caller
+ *
+ * Notes: The answer only remains valid so long as the proc_fdlock is
+ * held by the caller.
*/
int
-fdavail(p, n)
- struct proc *p;
- int n;
+fdavail(proc_t p, int n)
{
struct filedesc *fdp = p->p_fd;
struct fileproc **fpp;
return (0);
}
-void
-fdrelse(p, fd)
- struct proc *p;
- int fd;
-{
- _fdrelse(p->p_fd, fd);
-}
+/*
+ * fdrelse
+ *
+ * Description: Legacy KPI wrapper function for _fdrelse
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to free
+ *
+ * Returns: void
+ *
+ * Locks: Assumes proc_fdlock for process is held by the caller
+ */
void
-fddrop(p, fd)
- struct proc *p;
- int fd;
+fdrelse(proc_t p, int fd)
{
- struct filedesc *fdp = p->p_fd;
- struct fileproc *fp;
-
- if (fd < fdp->fd_freefile)
- fdp->fd_freefile = fd;
-#if DIAGNOSTIC
- if (fd > fdp->fd_lastfile)
- panic("fdrelse: fd_lastfile inconsistent");
-#endif
- fp = fdp->fd_ofiles[fd];
- fdp->fd_ofiles[fd] = NULL;
- fdp->fd_ofileflags[fd] = 0;
-
- while ((fd = fdp->fd_lastfile) > 0 &&
- fdp->fd_ofiles[fd] == NULL &&
- !(fdp->fd_ofileflags[fd] & UF_RESERVED))
- fdp->fd_lastfile--;
- FREE_ZONE(fp, sizeof *fp, M_FILEPROC);
+ _fdrelse(p, fd);
}
+/*
+ * fdgetf_noref
+ *
+ * Description: Get the fileproc pointer for the given fd from the per process
+ * open file table without taking an explicit reference on it.
+ *
+ * Parameters: p Process containing fd
+ * fd fd to obtain fileproc for
+ * resultfp Pointer to pointer return area
+ *
+ * Returns: 0 Success
+ * EBADF
+ *
+ * Implicit returns:
+ * *resultfp (modified) Pointer to fileproc pointer
+ *
+ * Locks: Assumes proc_fdlock for process is held by the caller
+ *
+ * Notes: Because there is no reference explicitly taken, the returned
+ * fileproc pointer is only valid so long as the proc_fdlock
+ * remains held by the caller.
+ */
int
-fdgetf_noref(p, fd, resultfp)
- struct proc *p;
- int fd;
- struct fileproc **resultfp;
+fdgetf_noref(proc_t p, int fd, struct fileproc **resultfp)
{
struct filedesc *fdp = p->p_fd;
struct fileproc *fp;
}
-/* should be called only when proc_fdlock is held */
-void
-fp_setflags(proc_t p, struct fileproc * fp, int flags)
+/*
+ * fp_getfvp
+ *
+ * Description: Get fileproc and vnode pointer for a given fd from the per
+ * process open file table of the specified process, and if
+ * successful, increment the f_iocount
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to get information for
+ * resultfp Pointer to result fileproc
+ * pointer area, or 0 if none
+ * resultvp Pointer to result vnode pointer
+ * area, or 0 if none
+ *
+ * Returns: 0 Success
+ * EBADF Bad file descriptor
+ * ENOTSUP fd does not refer to a vnode
+ *
+ * Implicit returns:
+ * *resultfp (modified) Fileproc pointer
+ * *resultvp (modified) vnode pointer
+ *
+ * Notes: The resultfp and resultvp fields are optional, and may be
+ * independently specified as NULL to skip returning information
+ *
+ * Locks: Internally takes and releases proc_fdlock
+ */
+int
+fp_getfvp(proc_t p, int fd, struct fileproc **resultfp, struct vnode **resultvp)
{
- proc_fdlock(p);
- fp->f_flags |= flags;
- proc_fdunlock(p);
-}
+ struct filedesc *fdp = p->p_fd;
+ struct fileproc *fp;
-void
-fp_clearflags(proc_t p, struct fileproc * fp, int flags)
-{
+ proc_fdlock_spin(p);
+ if (fd < 0 || fd >= fdp->fd_nfiles ||
+ (fp = fdp->fd_ofiles[fd]) == NULL ||
+ (fdp->fd_ofileflags[fd] & UF_RESERVED)) {
+ proc_fdunlock(p);
+ return (EBADF);
+ }
+ if (fp->f_type != DTYPE_VNODE) {
+ proc_fdunlock(p);
+ return(ENOTSUP);
+ }
+ fp->f_iocount++;
- proc_fdlock(p);
- if (fp)
- fp->f_flags &= ~flags;
+ if (resultfp)
+ *resultfp = fp;
+ if (resultvp)
+ *resultvp = (struct vnode *)fp->f_data;
proc_fdunlock(p);
+
+ return (0);
}
+
+/*
+ * fp_getfvpandvid
+ *
+ * Description: Get fileproc, vnode pointer, and vid for a given fd from the
+ * per process open file table of the specified process, and if
+ * successful, increment the f_iocount
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to get information for
+ * resultfp Pointer to result fileproc
+ * pointer area, or 0 if none
+ * resultvp Pointer to result vnode pointer
+ * area, or 0 if none
+ * vidp Pointer to resuld vid area
+ *
+ * Returns: 0 Success
+ * EBADF Bad file descriptor
+ * ENOTSUP fd does not refer to a vnode
+ *
+ * Implicit returns:
+ * *resultfp (modified) Fileproc pointer
+ * *resultvp (modified) vnode pointer
+ * *vidp vid value
+ *
+ * Notes: The resultfp and resultvp fields are optional, and may be
+ * independently specified as NULL to skip returning information
+ *
+ * Locks: Internally takes and releases proc_fdlock
+ */
int
-fp_getfvp(p, fd, resultfp, resultvp)
- struct proc *p;
- int fd;
- struct fileproc **resultfp;
- struct vnode **resultvp;
+fp_getfvpandvid(proc_t p, int fd, struct fileproc **resultfp,
+ struct vnode **resultvp, uint32_t *vidp)
{
struct filedesc *fdp = p->p_fd;
struct fileproc *fp;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if (fd < 0 || fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED)) {
*resultfp = fp;
if (resultvp)
*resultvp = (struct vnode *)fp->f_data;
+ if (vidp)
+ *vidp = (uint32_t)vnode_vid((struct vnode *)fp->f_data);
proc_fdunlock(p);
return (0);
/*
+ * fp_getfsock
+ *
+ * Description: Get fileproc and socket pointer for a given fd from the
+ * per process open file table of the specified process, and if
+ * successful, increment the f_iocount
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to get information for
+ * resultfp Pointer to result fileproc
+ * pointer area, or 0 if none
+ * results Pointer to result socket
+ * pointer area, or 0 if none
+ *
* Returns: EBADF The file descriptor is invalid
* EOPNOTSUPP The file descriptor is not a socket
* 0 Success
*
+ * Implicit returns:
+ * *resultfp (modified) Fileproc pointer
+ * *results (modified) socket pointer
+ *
* Notes: EOPNOTSUPP should probably be ENOTSOCK; this function is only
* ever called from accept1().
*/
int
-fp_getfsock(p, fd, resultfp, results)
- struct proc *p;
- int fd;
- struct fileproc **resultfp;
- struct socket **results;
+fp_getfsock(proc_t p, int fd, struct fileproc **resultfp,
+ struct socket **results)
{
struct filedesc *fdp = p->p_fd;
struct fileproc *fp;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if (fd < 0 || fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED)) {
}
+/*
+ * fp_getfkq
+ *
+ * Description: Get fileproc and kqueue pointer for a given fd from the
+ * per process open file table of the specified process, and if
+ * successful, increment the f_iocount
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to get information for
+ * resultfp Pointer to result fileproc
+ * pointer area, or 0 if none
+ * resultkq Pointer to result kqueue
+ * pointer area, or 0 if none
+ *
+ * Returns: EBADF The file descriptor is invalid
+ * EBADF The file descriptor is not a socket
+ * 0 Success
+ *
+ * Implicit returns:
+ * *resultfp (modified) Fileproc pointer
+ * *resultkq (modified) kqueue pointer
+ *
+ * Notes: The second EBADF should probably be something else to make
+ * the error condition distinct.
+ */
int
-fp_getfkq(p, fd, resultfp, resultkq)
- struct proc *p;
- int fd;
- struct fileproc **resultfp;
- struct kqueue **resultkq;
+fp_getfkq(proc_t p, int fd, struct fileproc **resultfp,
+ struct kqueue **resultkq)
{
struct filedesc *fdp = p->p_fd;
struct fileproc *fp;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if ( fd < 0 || fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED)) {
return (0);
}
+
+/*
+ * fp_getfpshm
+ *
+ * Description: Get fileproc and POSIX shared memory pointer for a given fd
+ * from the per process open file table of the specified process
+ * and if successful, increment the f_iocount
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to get information for
+ * resultfp Pointer to result fileproc
+ * pointer area, or 0 if none
+ * resultpshm Pointer to result POSIX
+ * shared memory pointer
+ * pointer area, or 0 if none
+ *
+ * Returns: EBADF The file descriptor is invalid
+ * EBADF The file descriptor is not a POSIX
+ * shared memory area
+ * 0 Success
+ *
+ * Implicit returns:
+ * *resultfp (modified) Fileproc pointer
+ * *resultpshm (modified) POSIX shared memory pointer
+ *
+ * Notes: The second EBADF should probably be something else to make
+ * the error condition distinct.
+ */
int
-fp_getfpshm(p, fd, resultfp, resultpshm)
- struct proc *p;
- int fd;
- struct fileproc **resultfp;
- struct pshmnode **resultpshm;
+fp_getfpshm(proc_t p, int fd, struct fileproc **resultfp,
+ struct pshmnode **resultpshm)
{
struct filedesc *fdp = p->p_fd;
struct fileproc *fp;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if (fd < 0 || fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED)) {
}
+/*
+ * fp_getfsem
+ *
+ * Description: Get fileproc and POSIX semaphore pointer for a given fd from
+ * the per process open file table of the specified process
+ * and if successful, increment the f_iocount
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to get information for
+ * resultfp Pointer to result fileproc
+ * pointer area, or 0 if none
+ * resultpsem Pointer to result POSIX
+ * semaphore pointer area, or
+ * 0 if none
+ *
+ * Returns: EBADF The file descriptor is invalid
+ * EBADF The file descriptor is not a POSIX
+ * semaphore
+ * 0 Success
+ *
+ * Implicit returns:
+ * *resultfp (modified) Fileproc pointer
+ * *resultpsem (modified) POSIX semaphore pointer
+ *
+ * Notes: The second EBADF should probably be something else to make
+ * the error condition distinct.
+ *
+ * In order to support unnamed POSIX semaphores, the named
+ * POSIX semaphores will have to move out of the per-process
+ * open filetable, and into a global table that is shared with
+ * unnamed POSIX semaphores, since unnamed POSIX semaphores
+ * are typically used by declaring instances in shared memory,
+ * and there's no other way to do this without changing the
+ * underlying type, which would introduce binary compatibility
+ * issues.
+ */
int
-fp_getfpsem(p, fd, resultfp, resultpsem)
- struct proc *p;
- int fd;
- struct fileproc **resultfp;
- struct psemnode **resultpsem;
+fp_getfpsem(proc_t p, int fd, struct fileproc **resultfp,
+ struct psemnode **resultpsem)
{
struct filedesc *fdp = p->p_fd;
struct fileproc *fp;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if (fd < 0 || fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED)) {
return (0);
}
+
+
+/*
+ * fp_getfpipe
+ *
+ * Description: Get fileproc and pipe pointer for a given fd from the
+ * per process open file table of the specified process
+ * and if successful, increment the f_iocount
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to get information for
+ * resultfp Pointer to result fileproc
+ * pointer area, or 0 if none
+ * resultpipe Pointer to result pipe
+ * pointer area, or 0 if none
+ *
+ * Returns: EBADF The file descriptor is invalid
+ * EBADF The file descriptor is not a socket
+ * 0 Success
+ *
+ * Implicit returns:
+ * *resultfp (modified) Fileproc pointer
+ * *resultpipe (modified) pipe pointer
+ *
+ * Notes: The second EBADF should probably be something else to make
+ * the error condition distinct.
+ */
int
-fp_lookup(p, fd, resultfp, locked)
- struct proc *p;
- int fd;
- struct fileproc **resultfp;
- int locked;
+fp_getfpipe(proc_t p, int fd, struct fileproc **resultfp,
+ struct pipe **resultpipe)
{
struct filedesc *fdp = p->p_fd;
struct fileproc *fp;
- if (!locked)
- proc_fdlock(p);
+ proc_fdlock_spin(p);
+ if (fd < 0 || fd >= fdp->fd_nfiles ||
+ (fp = fdp->fd_ofiles[fd]) == NULL ||
+ (fdp->fd_ofileflags[fd] & UF_RESERVED)) {
+ proc_fdunlock(p);
+ return (EBADF);
+ }
+ if (fp->f_type != DTYPE_PIPE) {
+ proc_fdunlock(p);
+ return(EBADF);
+ }
+ fp->f_iocount++;
+
+ if (resultfp)
+ *resultfp = fp;
+ if (resultpipe)
+ *resultpipe = (struct pipe *)fp->f_data;
+ proc_fdunlock(p);
+
+ return (0);
+}
+
+
+#define DTYPE_ATALK -1 /* XXX This does not belong here */
+
+
+/*
+ * fp_getfatalk
+ *
+ * Description: Get fileproc and atalk pointer for a given fd from the
+ * per process open file table of the specified process
+ * and if successful, increment the f_iocount
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to get information for
+ * resultfp Pointer to result fileproc
+ * pointer area, or 0 if none
+ * resultatalk Pointer to result atalk
+ * pointer area, or 0 if none
+ * Returns: EBADF The file descriptor is invalid
+ * EBADF The file descriptor is not a socket
+ * 0 Success
+ *
+ * Implicit returns:
+ * *resultfp (modified) Fileproc pointer
+ * *resultatalk (modified) atalk pointer
+ *
+ * Notes: The second EBADF should probably be something else to make
+ * the error condition distinct.
+ *
+ * XXX This code is specific to AppleTalk protocol support, and
+ * XXX should be conditionally compiled
+ */
+int
+fp_getfatalk(proc_t p, int fd, struct fileproc **resultfp,
+ struct atalk **resultatalk)
+{
+ struct filedesc *fdp = p->p_fd;
+ struct fileproc *fp;
+
+ proc_fdlock_spin(p);
if (fd < 0 || fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
(fdp->fd_ofileflags[fd] & UF_RESERVED)) {
+ proc_fdunlock(p);
+ return (EBADF);
+ }
+ if (fp->f_type != (DTYPE_ATALK+1)) {
+ proc_fdunlock(p);
+ return(EBADF);
+ }
+ fp->f_iocount++;
+
+ if (resultfp)
+ *resultfp = fp;
+ if (resultatalk)
+ *resultatalk = (struct atalk *)fp->f_data;
+ proc_fdunlock(p);
+
+ return (0);
+}
+
+
+/*
+ * fp_lookup
+ *
+ * Description: Get fileproc pointer for a given fd from the per process
+ * open file table of the specified process and if successful,
+ * increment the f_iocount
+ *
+ * Parameters: p Process in which fd lives
+ * fd fd to get information for
+ * resultfp Pointer to result fileproc
+ * pointer area, or 0 if none
+ * locked !0 if the caller holds the
+ * proc_fdlock, 0 otherwise
+ *
+ * Returns: 0 Success
+ * EBADF Bad file descriptor
+ *
+ * Implicit returns:
+ * *resultfp (modified) Fileproc pointer
+ *
+ * Locks: If the argument 'locked' is non-zero, then the caller is
+ * expected to have taken and held the proc_fdlock; if it is
+ * zero, than this routine internally takes and drops this lock.
+ */
+int
+fp_lookup(proc_t p, int fd, struct fileproc **resultfp, int locked)
+{
+ struct filedesc *fdp = p->p_fd;
+ struct fileproc *fp;
+
+ if (!locked)
+ proc_fdlock_spin(p);
+ if (fd < 0 || fdp == NULL || fd >= fdp->fd_nfiles ||
+ (fp = fdp->fd_ofiles[fd]) == NULL ||
+ (fdp->fd_ofileflags[fd] & UF_RESERVED)) {
if (!locked)
proc_fdunlock(p);
return (EBADF);
return (0);
}
+
+/*
+ * fp_drop_written
+ *
+ * Description: Set the FP_WRITTEN flag on the fileproc and drop the I/O
+ * reference previously taken by calling fp_lookup et. al.
+ *
+ * Parameters: p Process in which the fd lives
+ * fd fd associated with the fileproc
+ * fp fileproc on which to set the
+ * flag and drop the reference
+ *
+ * Returns: 0 Success
+ * fp_drop:EBADF Bad file descriptor
+ *
+ * Locks: This function internally takes and drops the proc_fdlock for
+ * the supplied process
+ *
+ * Notes: The fileproc must correspond to the fd in the supplied proc
+ */
int
fp_drop_written(proc_t p, int fd, struct fileproc *fp)
{
int error;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
fp->f_flags |= FP_WRITTEN;
}
+/*
+ * fp_drop_event
+ *
+ * Description: Set the FP_WAITEVENT flag on the fileproc and drop the I/O
+ * reference previously taken by calling fp_lookup et. al.
+ *
+ * Parameters: p Process in which the fd lives
+ * fd fd associated with the fileproc
+ * fp fileproc on which to set the
+ * flag and drop the reference
+ *
+ * Returns: 0 Success
+ * fp_drop:EBADF Bad file descriptor
+ *
+ * Locks: This function internally takes and drops the proc_fdlock for
+ * the supplied process
+ *
+ * Notes: The fileproc must correspond to the fd in the supplied proc
+ */
int
fp_drop_event(proc_t p, int fd, struct fileproc *fp)
{
int error;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
fp->f_flags |= FP_WAITEVENT;
return (error);
}
+
+/*
+ * fp_drop
+ *
+ * Description: Drop the I/O reference previously taken by calling fp_lookup
+ * et. al.
+ *
+ * Parameters: p Process in which the fd lives
+ * fd fd associated with the fileproc
+ * fp fileproc on which to set the
+ * flag and drop the reference
+ * locked flag to internally take and
+ * drop proc_fdlock if it is not
+ * already held by the caller
+ *
+ * Returns: 0 Success
+ * EBADF Bad file descriptor
+ *
+ * Locks: This function internally takes and drops the proc_fdlock for
+ * the supplied process if 'locked' is non-zero, and assumes that
+ * the caller already holds this lock if 'locked' is non-zero.
+ *
+ * Notes: The fileproc must correspond to the fd in the supplied proc
+ */
int
-fp_drop(p, fd, fp, locked)
- struct proc *p;
- int fd;
- struct fileproc *fp;
- int locked;
+fp_drop(proc_t p, int fd, struct fileproc *fp, int locked)
{
struct filedesc *fdp = p->p_fd;
+ int needwakeup = 0;
if (!locked)
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if ((fp == FILEPROC_NULL) && (fd < 0 || fd >= fdp->fd_nfiles ||
(fp = fdp->fd_ofiles[fd]) == NULL ||
((fdp->fd_ofileflags[fd] & UF_RESERVED) &&
if (p->p_fpdrainwait && fp->f_iocount == 0) {
p->p_fpdrainwait = 0;
- wakeup(&p->p_fpdrainwait);
+ needwakeup = 1;
}
if (!locked)
proc_fdunlock(p);
+ if (needwakeup)
+ wakeup(&p->p_fpdrainwait);
return (0);
}
+
+/*
+ * file_vnode
+ *
+ * Description: Given an fd, look it up in the current process's per process
+ * open file table, and return its internal vnode pointer.
+ *
+ * Parameters: fd fd to obtain vnode from
+ * vpp pointer to vnode return area
+ *
+ * Returns: 0 Success
+ * EINVAL The fd does not refer to a
+ * vnode fileproc entry
+ * fp_lookup:EBADF Bad file descriptor
+ *
+ * Implicit returns:
+ * *vpp (modified) Returned vnode pointer
+ *
+ * Locks: This function internally takes and drops the proc_fdlock for
+ * the current process
+ *
+ * Notes: If successful, this function increments the f_iocount on the
+ * fd's corresponding fileproc.
+ *
+ * The fileproc referenced is not returned; because of this, care
+ * must be taken to not drop the last reference (e.g. by closing
+ * the file). This is inhernely unsafe, since the reference may
+ * not be recoverable from the vnode, if there is a subsequent
+ * close that destroys the associate fileproc. The caller should
+ * therefore retain their own reference on the fileproc so that
+ * the f_iocount can be dropped subsequently. Failure to do this
+ * can result in the returned pointer immediately becoming invalid
+ * following the call.
+ *
+ * Use of this function is discouraged.
+ */
int
file_vnode(int fd, struct vnode **vpp)
{
- struct proc * p = current_proc();
+ proc_t p = current_proc();
struct fileproc *fp;
int error;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if ( (error = fp_lookup(p, fd, &fp, 1)) ) {
proc_fdunlock(p);
return(error);
}
+/*
+ * file_socket
+ *
+ * Description: Given an fd, look it up in the current process's per process
+ * open file table, and return its internal socket pointer.
+ *
+ * Parameters: fd fd to obtain vnode from
+ * sp pointer to socket return area
+ *
+ * Returns: 0 Success
+ * ENOTSOCK Not a socket
+ * fp_lookup:EBADF Bad file descriptor
+ *
+ * Implicit returns:
+ * *sp (modified) Returned socket pointer
+ *
+ * Locks: This function internally takes and drops the proc_fdlock for
+ * the current process
+ *
+ * Notes: If successful, this function increments the f_iocount on the
+ * fd's corresponding fileproc.
+ *
+ * The fileproc referenced is not returned; because of this, care
+ * must be taken to not drop the last reference (e.g. by closing
+ * the file). This is inhernely unsafe, since the reference may
+ * not be recoverable from the socket, if there is a subsequent
+ * close that destroys the associate fileproc. The caller should
+ * therefore retain their own reference on the fileproc so that
+ * the f_iocount can be dropped subsequently. Failure to do this
+ * can result in the returned pointer immediately becoming invalid
+ * following the call.
+ *
+ * Use of this function is discouraged.
+ */
int
file_socket(int fd, struct socket **sp)
{
- struct proc * p = current_proc();
+ proc_t p = current_proc();
struct fileproc *fp;
int error;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if ( (error = fp_lookup(p, fd, &fp, 1)) ) {
proc_fdunlock(p);
return(error);
return(0);
}
+
+/*
+ * file_flags
+ *
+ * Description: Given an fd, look it up in the current process's per process
+ * open file table, and return its fileproc's flags field.
+ *
+ * Parameters: fd fd whose flags are to be
+ * retrieved
+ * flags pointer to flags data area
+ *
+ * Returns: 0 Success
+ * ENOTSOCK Not a socket
+ * fp_lookup:EBADF Bad file descriptor
+ *
+ * Implicit returns:
+ * *flags (modified) Returned flags field
+ *
+ * Locks: This function internally takes and drops the proc_fdlock for
+ * the current process
+ *
+ * Notes: This function will internally increment and decrement the
+ * f_iocount of the fileproc as part of its operation.
+ */
int
-file_flags(int fd, int * flags)
+file_flags(int fd, int *flags)
{
- struct proc * p = current_proc();
+ proc_t p = current_proc();
struct fileproc *fp;
int error;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if ( (error = fp_lookup(p, fd, &fp, 1)) ) {
proc_fdunlock(p);
return(error);
}
+/*
+ * file_drop
+ *
+ * Description: Drop an iocount reference on an fd, and wake up any waiters
+ * for draining (i.e. blocked in fileproc_drain() called during
+ * the last attempt to close a file).
+ *
+ * Parameters: fd fd on which an ioreference is
+ * to be dropped
+ *
+ * Returns: 0 Success
+ * EBADF Bad file descriptor
+ *
+ * Description: Given an fd, look it up in the current process's per process
+ * open file table, and drop it's fileproc's f_iocount by one
+ *
+ * Notes: This is intended as a corresponding operation to the functions
+ * file_vnode() and file_socket() operations.
+ *
+ * Technically, the close reference is supposed to be protected
+ * by a fileproc_drain(), however, a drain will only block if
+ * the fd refers to a character device, and that device has had
+ * preparefileread() called on it. If it refers to something
+ * other than a character device, then the drain will occur and
+ * block each close attempt, rather than merely the last close.
+ *
+ * Since it's possible for an fd that refers to a character
+ * device to have an intermediate close followed by an open to
+ * cause a different file to correspond to that descriptor,
+ * unless there was a cautionary reference taken on the fileproc,
+ * this is an inherently unsafe function. This happens in the
+ * case where multiple fd's in a process refer to the same
+ * character device (e.g. stdin/out/err pointing to a tty, etc.).
+ *
+ * Use of this function is discouraged.
+ */
int
file_drop(int fd)
{
struct fileproc *fp;
- struct proc *p = current_proc();
+ proc_t p = current_proc();
+ int needwakeup = 0;
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if (fd < 0 || fd >= p->p_fd->fd_nfiles ||
(fp = p->p_fd->fd_ofiles[fd]) == NULL ||
((p->p_fd->fd_ofileflags[fd] & UF_RESERVED) &&
if (p->p_fpdrainwait && fp->f_iocount == 0) {
p->p_fpdrainwait = 0;
- wakeup(&p->p_fpdrainwait);
+ needwakeup = 1;
}
proc_fdunlock(p);
- return(0);
-
+ if (needwakeup)
+ wakeup(&p->p_fpdrainwait);
+ return(0);
}
+
+/*
+ * falloc
+ *
+ * Description: Allocate an entry in the per process open file table and
+ * return the corresponding fileproc and fd.
+ *
+ * Parameters: p The process in whose open file
+ * table the fd is to be allocated
+ * resultfp Pointer to fileproc pointer
+ * return area
+ * resultfd Pointer to fd return area
+ * ctx VFS context
+ *
+ * Returns: 0 Success
+ * falloc:ENFILE Too many open files in system
+ * falloc:EMFILE Too many open files in process
+ * falloc:ENOMEM M_FILEPROC or M_FILEGLOB zone
+ * exhausted
+ *
+ * Implicit returns:
+ * *resultfd (modified) Returned fileproc pointer
+ * *resultfd (modified) Returned fd
+ *
+ * Locks: This function takes and drops the proc_fdlock; if this lock
+ * is alread held, use falloc_locked() instead.
+ *
+ * Notes: This function takes separate process and context arguments
+ * solely to support kern_exec.c; otherwise, it would take
+ * neither, and expect falloc_locked() to use the
+ * vfs_context_current() routine internally.
+ */
int
-falloc(p, resultfp, resultfd )
- struct proc *p;
- struct fileproc **resultfp;
- int *resultfd;
+falloc(proc_t p, struct fileproc **resultfp, int *resultfd, vfs_context_t ctx)
{
int error;
proc_fdlock(p);
- error = falloc_locked(p, resultfp, resultfd, 1);
+ error = falloc_locked(p, resultfp, resultfd, ctx, 1);
proc_fdunlock(p);
return(error);
}
+
+
/*
+ * falloc_locked
+ *
* Create a new open file structure and allocate
* a file decriptor for the process that refers to it.
+ *
+ * Returns: 0 Success
+ *
+ * Description: Allocate an entry in the per process open file table and
+ * return the corresponding fileproc and fd.
+ *
+ * Parameters: p The process in whose open file
+ * table the fd is to be allocated
+ * resultfp Pointer to fileproc pointer
+ * return area
+ * resultfd Pointer to fd return area
+ * ctx VFS context
+ * locked Flag to indicate whether the
+ * caller holds proc_fdlock
+ *
+ * Returns: 0 Success
+ * ENFILE Too many open files in system
+ * fdalloc:EMFILE Too many open files in process
+ * ENOMEM M_FILEPROC or M_FILEGLOB zone
+ * exhausted
+ * fdalloc:ENOMEM
+ *
+ * Implicit returns:
+ * *resultfd (modified) Returned fileproc pointer
+ * *resultfd (modified) Returned fd
+ *
+ * Locks: If the parameter 'locked' is zero, this function takes and
+ * drops the proc_fdlock; if non-zero, the caller must hold the
+ * lock.
+ *
+ * Notes: If you intend to use a non-zero 'locked' parameter, use the
+ * utility function falloc() instead.
+ *
+ * This function takes separate process and context arguments
+ * solely to support kern_exec.c; otherwise, it would take
+ * neither, and use the vfs_context_current() routine internally.
*/
int
-falloc_locked(p, resultfp, resultfd, locked)
- struct proc *p;
- struct fileproc **resultfp;
- int *resultfd;
- int locked;
+falloc_locked(proc_t p, struct fileproc **resultfp, int *resultfd,
+ vfs_context_t ctx, int locked)
{
struct fileproc *fp, *fq;
struct fileglob *fg;
tablefull("file");
return (ENFILE);
}
+#if CONFIG_MACF
+ error = mac_file_check_create(proc_ucred(p));
+ if (error) {
+ if (!locked)
+ proc_fdunlock(p);
+ return (error);
+ }
+#endif
+
/*
* Allocate a new file descriptor.
* If the process has file descriptor zero open, add to the list
proc_fdunlock(p);
MALLOC_ZONE(fp, struct fileproc *, sizeof(struct fileproc), M_FILEPROC, M_WAITOK);
+ if (fp == NULL) {
+ if (locked)
+ proc_fdlock(p);
+ return (ENOMEM);
+ }
MALLOC_ZONE(fg, struct fileglob *, sizeof(struct fileglob), M_FILEGLOB, M_WAITOK);
+ if (fg == NULL) {
+ FREE_ZONE(fp, sizeof(*fp), M_FILEPROC);
+ if (locked)
+ proc_fdlock(p);
+ return (ENOMEM);
+ }
bzero(fp, sizeof(struct fileproc));
bzero(fg, sizeof(struct fileglob));
lck_mtx_init(&fg->fg_lock, file_lck_grp, file_lck_attr);
fp->f_iocount = 1;
fg->fg_count = 1;
fp->f_fglob = fg;
+#if CONFIG_MACF
+ mac_file_label_init(fg);
+#endif
+
+ kauth_cred_ref(ctx->vc_ucred);
proc_fdlock(p);
- fp->f_cred = kauth_cred_proc_ref(p);
+ fp->f_cred = ctx->vc_ucred;
- lck_mtx_lock(file_flist_lock);
+#if CONFIG_MACF
+ mac_file_label_associate(fp->f_cred, fg);
+#endif
+
+ lck_mtx_lock_spin(file_flist_lock);
nfiles++;
return (0);
}
+
/*
- * Free a file structure.
+ * fg_free
+ *
+ * Description: Free a file structure; drop the global open file count, and
+ * drop the credential reference, if the fileglob has one, and
+ * destroy the instance mutex before freeing
+ *
+ * Parameters: fg Pointer to fileglob to be
+ * freed
+ *
+ * Returns: void
*/
void
-fg_free(fg)
- struct fileglob *fg;
+fg_free(struct fileglob *fg)
{
- kauth_cred_t cred;
-
- lck_mtx_lock(file_flist_lock);
+ lck_mtx_lock_spin(file_flist_lock);
LIST_REMOVE(fg, f_list);
nfiles--;
lck_mtx_unlock(file_flist_lock);
- cred = fg->fg_cred;
- if (cred != NOCRED) {
- fg->fg_cred = NOCRED;
- kauth_cred_rele(cred);
+ if (IS_VALID_CRED(fg->fg_cred)) {
+ kauth_cred_unref(&fg->fg_cred);
}
lck_mtx_destroy(&fg->fg_lock, file_lck_grp);
+#if CONFIG_MACF
+ mac_file_label_destroy(fg);
+#endif
FREE_ZONE(fg, sizeof *fg, M_FILEGLOB);
}
+
+/*
+ * fdexec
+ *
+ * Description: Perform close-on-exec processing for all files in a process
+ * that are either marked as close-on-exec, or which were in the
+ * process of being opened at the time of the execve
+ *
+ * Parameters: p Pointer to process calling
+ * execve
+ *
+ * Returns: void
+ *
+ * Locks: This function internally takes and drops proc_fdlock()
+ *
+ * Notes: This function drops and retakes the kernel funnel; this is
+ * inherently unsafe, since another thread may have the
+ * proc_fdlock.
+ *
+ * XXX: We should likely reverse the lock and funnel drop/acquire
+ * order to avoid the small race window; it's also possible that
+ * if the program doing the exec has an outstanding listen socket
+ * and a network connection is completed asyncrhonously that we
+ * will end up with a "ghost" socket reference in the new process.
+ *
+ * This needs reworking to make it safe to remove the funnel from
+ * the execve and posix_spawn system calls.
+ */
void
-fdexec(p)
- struct proc *p;
+fdexec(proc_t p)
{
struct filedesc *fdp = p->p_fd;
int i = fdp->fd_lastfile;
- struct fileproc **fpp = &fdp->fd_ofiles[i];
- char *flags = &fdp->fd_ofileflags[i];
- int funnel_state;
+ struct fileproc *fp;
- funnel_state = thread_funnel_set(kernel_flock, FALSE);
proc_fdlock(p);
-
while (i >= 0) {
- if ((*flags & (UF_RESERVED|UF_EXCLOSE)) == UF_EXCLOSE) {
- struct fileproc *fp = *fpp;
+ fp = fdp->fd_ofiles[i];
+ if (
+ ((fdp->fd_ofileflags[i] & (UF_RESERVED|UF_EXCLOSE)) == UF_EXCLOSE)
+#if CONFIG_MACF
+ || (fp && mac_file_check_inherit(proc_ucred(p), fp->f_fglob))
+#endif
+ ) {
if (i < fdp->fd_knlistsize)
knote_fdclose(p, i);
-
- *fpp = NULL; *flags = 0;
+ procfdtbl_clearfd(p, i);
if (i == fdp->fd_lastfile && i > 0)
fdp->fd_lastfile--;
+ if (i < fdp->fd_freefile)
+ fdp->fd_freefile = i;
closef_locked(fp, fp->f_fglob, p);
- FREE_ZONE(fp, sizeof *fp, M_FILEPROC);
+ FREE_ZONE(fp, sizeof(*fp), M_FILEPROC);
}
-
- i--; fpp--; flags--;
+ i--;
}
proc_fdunlock(p);
- thread_funnel_set(kernel_flock, funnel_state);
}
+
/*
- * Copy a filedesc structure.
+ * fdcopy
+ *
+ * Description: Copy a filedesc structure. This is normally used as part of
+ * forkproc() when forking a new process, to copy the per process
+ * open file table over to the new process.
+ *
+ * Parameters: p Process whose open file table
+ * is to be copied (parent)
+ * uth_cdir Per thread current working
+ * cirectory, or NULL
+ *
+ * Returns: NULL Copy failed
+ * !NULL Pointer to new struct filedesc
+ *
+ * Locks: This function internally takes and drops proc_fdlock()
+ *
+ * Notes: Files are copied directly, ignoring the new resource limits
+ * for the process that's being copied into. Since the descriptor
+ * references are just additional references, this does not count
+ * against the number of open files on the system.
+ *
+ * The struct filedesc includes the current working directory,
+ * and the current root directory, if the process is chroot'ed.
+ *
+ * If the exec was called by a thread using a per thread current
+ * working directory, we inherit the working directory from the
+ * thread making the call, rather than from the process.
+ *
+ * In the case of a failure to obtain a reference, for most cases,
+ * the file entry will be silently droppped. There's an exception
+ * for the case of a chroot dir, since a failure to to obtain a
+ * reference there would constitute an "escape" from the chroot
+ * environment, which must not be allowed. In that case, we will
+ * deny the execve() operation, rather than allowing the escape.
*/
struct filedesc *
-fdcopy(p)
- struct proc *p;
+fdcopy(proc_t p, vnode_t uth_cdir)
{
struct filedesc *newfdp, *fdp = p->p_fd;
int i;
vnode_t v_dir;
MALLOC_ZONE(newfdp, struct filedesc *,
- sizeof *newfdp, M_FILEDESC, M_WAITOK);
+ sizeof(*newfdp), M_FILEDESC, M_WAITOK);
if (newfdp == NULL)
return(NULL);
/*
* the FD_CHROOT flag will be inherited via this copy
*/
- (void) memcpy(newfdp, fdp, sizeof *newfdp);
+ (void) memcpy(newfdp, fdp, sizeof(*newfdp));
+
+ /*
+ * If we are running with per-thread current working directories,
+ * inherit the new current working directory from the current thread
+ * instead, before we take our references.
+ */
+ if (uth_cdir != NULLVP)
+ newfdp->fd_cdir = uth_cdir;
/*
- * for both fd_cdir and fd_rdir make sure we get
+ * For both fd_cdir and fd_rdir make sure we get
* a valid reference... if we can't, than set
* set the pointer(s) to NULL in the child... this
* will keep us from using a non-referenced vp
if ( (vnode_ref(v_dir)) )
newfdp->fd_rdir = NULL;
vnode_put(v_dir);
- } else
+ } else {
newfdp->fd_rdir = NULL;
+ }
}
+ /* Coming from a chroot environment and unable to get a reference... */
if (newfdp->fd_rdir == NULL && fdp->fd_rdir) {
/*
- * we couldn't get a new reference on
- * the root directory being
- * inherited... we might as well drop
- * our reference from the parent also
- * since the vnode has gone DEAD making
- * it useless... by dropping it we'll
- * be that much closer to recyling it
+ * We couldn't get a new reference on
+ * the chroot directory being
+ * inherited... this is fatal, since
+ * otherwise it would constitute an
+ * escape from a chroot environment by
+ * the new process.
*/
- vnode_rele(fdp->fd_rdir);
- fdp->fd_rdir = NULL;
+ if (newfdp->fd_cdir)
+ vnode_rele(newfdp->fd_cdir);
+ FREE_ZONE(newfdp, sizeof *newfdp, M_FILEDESC);
+ return(NULL);
}
newfdp->fd_refcnt = 1;
if (newfdp->fd_rdir)
vnode_rele(newfdp->fd_rdir);
- FREE_ZONE(newfdp, sizeof *newfdp, M_FILEDESC);
+ FREE_ZONE(newfdp, sizeof(*newfdp), M_FILEDESC);
return(NULL);
}
+ (void) memset(newfdp->fd_ofiles, 0, i * OFILESIZE);
proc_fdlock(p);
newfdp->fd_ofileflags = (char *) &newfdp->fd_ofiles[i];
char *flags;
(void) memcpy(newfdp->fd_ofiles, fdp->fd_ofiles,
- i * sizeof *fdp->fd_ofiles);
+ (newfdp->fd_lastfile + 1) * sizeof(*fdp->fd_ofiles));
(void) memcpy(newfdp->fd_ofileflags, fdp->fd_ofileflags,
- i * sizeof *fdp->fd_ofileflags);
+ (newfdp->fd_lastfile + 1) * sizeof(*fdp->fd_ofileflags));
/*
* kq descriptors cannot be copied.
fpp = newfdp->fd_ofiles;
flags = newfdp->fd_ofileflags;
- for (i = newfdp->fd_lastfile; i-- >= 0; fpp++, flags++)
+ for (i = newfdp->fd_lastfile + 1; --i >= 0; fpp++, flags++)
if ((ofp = *fpp) != NULL && !(*flags & UF_RESERVED)) {
MALLOC_ZONE(fp, struct fileproc *, sizeof(struct fileproc), M_FILEPROC, M_WAITOK);
- bzero(fp, sizeof(struct fileproc));
- fp->f_flags = ofp->f_flags;
- //fp->f_iocount = ofp->f_iocount;
- fp->f_iocount = 0;
- fp->f_fglob = ofp->f_fglob;
- (void)fg_ref(fp);
- *fpp = fp;
+ if (fp == NULL) {
+ /*
+ * XXX no room to copy, unable to
+ * XXX safely unwind state at present
+ */
+ *fpp = NULL;
+ } else {
+ bzero(fp, sizeof(struct fileproc));
+ fp->f_flags = ofp->f_flags;
+ //fp->f_iocount = ofp->f_iocount;
+ fp->f_iocount = 0;
+ fp->f_fglob = ofp->f_fglob;
+ (void)fg_ref(fp);
+ *fpp = fp;
+ }
} else {
+ if (i < newfdp->fd_freefile)
+ newfdp->fd_freefile = i;
*fpp = NULL;
*flags = 0;
}
- } else
- (void) memset(newfdp->fd_ofiles, 0, i * OFILESIZE);
+ }
proc_fdunlock(p);
return (newfdp);
}
+
/*
- * Release a filedesc structure.
+ * fdfree
+ *
+ * Description: Release a filedesc (per process open file table) structure;
+ * this is done on process exit(), or from forkproc_free() if
+ * the fork fails for some reason subsequent to a successful
+ * call to fdcopy()
+ *
+ * Parameters: p Pointer to process going away
+ *
+ * Returns: void
+ *
+ * Locks: This function internally takes and drops proc_fdlock()
*/
void
-fdfree(p)
- struct proc *p;
+fdfree(proc_t p)
{
struct filedesc *fdp;
struct fileproc *fp;
if ((fp = fdp->fd_ofiles[i]) != NULL) {
if (fdp->fd_ofileflags[i] & UF_RESERVED)
- panic("fdfree: found fp with UF_RESERVED\n");
+ panic("fdfree: found fp with UF_RESERVED\n");
/* closef drops the iocount ... */
if ((fp->f_flags & FP_INCHRREAD) != 0)
fp->f_iocount++;
- fdp->fd_ofiles[i] = NULL;
- fdp->fd_ofileflags[i] |= UF_RESERVED;
+ procfdtbl_reservefd(p, i);
if (i < fdp->fd_knlistsize)
knote_fdclose(p, i);
if (fp->f_flags & FP_WAITEVENT)
(void)waitevent_close(p, fp);
(void) closef_locked(fp, fp->f_fglob, p);
- FREE_ZONE(fp, sizeof *fp, M_FILEPROC);
+ FREE_ZONE(fp, sizeof(*fp), M_FILEPROC);
}
}
FREE_ZONE(fdp->fd_ofiles, fdp->fd_nfiles * OFILESIZE, M_OFILETABL);
if (fdp->fd_rdir)
vnode_rele(fdp->fd_rdir);
- proc_fdlock(p);
+ proc_fdlock_spin(p);
p->p_fd = NULL;
proc_fdunlock(p);
if (fdp->fd_knhash)
FREE(fdp->fd_knhash, M_KQUEUE);
- FREE_ZONE(fdp, sizeof *fdp, M_FILEDESC);
+ FREE_ZONE(fdp, sizeof(*fdp), M_FILEDESC);
}
+
+/*
+ * closef_finish
+ *
+ * Description: Called on last open instance for a fileglob for a file being
+ * closed.
+ *
+ * Parameters: fp Pointer to fileproc for fd
+ * fg Pointer to fileglob for fd
+ * p Pointer to proc structure
+ *
+ * Returns: 0 Success
+ * <fo_close>:??? Anything returnable by a per-fileops
+ * close function
+ *
+ * Note: fp can only be non-NULL if p is also non-NULL. If p is NULL,
+ * then fg must eith be locked (FHASLOCK) or must not have a
+ * type of DTYPE_VNODE.
+ *
+ * On return, the fg is freed.
+ *
+ * This function may block draining output to a character
+ * device on last close of that device.
+ */
static int
-closef_finish(fp, fg, p)
- struct fileproc *fp;
- struct fileglob *fg;
- struct proc *p;
+closef_finish(struct fileproc *fp, struct fileglob *fg, proc_t p, vfs_context_t ctx)
{
- struct vnode *vp;
- struct flock lf;
int error;
- struct vfs_context context;
- if ((fg->fg_flag & FHASLOCK) && fg->fg_type == DTYPE_VNODE) {
- lf.l_whence = SEEK_SET;
- lf.l_start = 0;
- lf.l_len = 0;
- lf.l_type = F_UNLCK;
- vp = (struct vnode *)fg->fg_data;
- context.vc_proc = p;
- context.vc_ucred = fg->fg_cred;
- (void) VNOP_ADVLOCK(vp, (caddr_t)fg, F_UNLCK, &lf, F_FLOCK, &context);
- }
+ /* fg_ops completed initialization? */
if (fg->fg_ops)
- error = fo_close(fg, p);
+ error = fo_close(fg, ctx);
else
error = 0;
+ /* if fp is non-NULL, drain it out */
if (((fp != (struct fileproc *)0) && ((fp->f_flags & FP_INCHRREAD) != 0))) {
- proc_fdlock(p);
+ proc_fdlock_spin(p);
if ( ((fp->f_flags & FP_INCHRREAD) != 0) ) {
fileproc_drain(p, fp);
}
return (error);
}
-int
-closef(fg, p)
- struct fileglob *fg;
- struct proc *p;
-{
- int error;
-
- proc_fdlock(p);
- error = closef_locked((struct fileproc *)0, fg, p);
- proc_fdunlock(p);
-
- return(error);
-}
/*
- * Internal form of close.
- * Decrement reference count on file structure.
- * Note: p may be NULL when closing a file
- * that was being passed in a message.
+ * closef_locked
+ *
+ * Description: Internal form of closef; called with proc_fdlock held
+ *
+ * Parameters: fp Pointer to fileproc for fd
+ * fg Pointer to fileglob for fd
+ * p Pointer to proc structure
+ *
+ * Returns: 0 Success
+ * closef_finish:??? Anything returnable by a per-fileops
+ * close function
+ *
+ * Note: Decrements reference count on file structure; if this was the
+ * last reference, then closef_finish() is called
+ *
+ * p and fp are allowed to be NULL when closing a file that was
+ * being passed in a message (but only if we are called when this
+ * is NOT the last reference).
*/
int
-closef_locked(fp, fg, p)
- struct fileproc *fp;
- struct fileglob *fg;
- struct proc *p;
+closef_locked(struct fileproc *fp, struct fileglob *fg, proc_t p)
{
struct vnode *vp;
struct flock lf;
if (fg == NULL) {
return (0);
}
+
+ /* Set up context with cred stashed in fg */
+ if (p == current_proc())
+ context.vc_thread = current_thread();
+ else
+ context.vc_thread = NULL;
+ context.vc_ucred = fg->fg_cred;
+
/*
* POSIX record locking dictates that any close releases ALL
* locks owned by this process. This is handled by setting
* If the descriptor was in a message, POSIX-style locks
* aren't passed with the descriptor.
*/
- if (p && (p->p_flag & P_ADVLOCK) && fg->fg_type == DTYPE_VNODE) {
+ if (p && (p->p_ladvflag & P_LADVLOCK) && fg->fg_type == DTYPE_VNODE) {
proc_fdunlock(p);
lf.l_whence = SEEK_SET;
vp = (struct vnode *)fg->fg_data;
if ( (error = vnode_getwithref(vp)) == 0 ) {
- context.vc_proc = p;
- context.vc_ucred = fg->fg_cred;
(void) VNOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_POSIX, &context);
-
(void)vnode_put(vp);
}
proc_fdlock(p);
}
- lck_mtx_lock(&fg->fg_lock);
+ lck_mtx_lock_spin(&fg->fg_lock);
fg->fg_count--;
if (fg->fg_count > 0) {
lck_mtx_unlock(&fg->fg_lock);
return (0);
}
+#if DIAGNOSTIC
if (fg->fg_count != 0)
- panic("fg: being freed with bad fg_count (%d)", fg, fg->fg_count);
+ panic("fg %p: being freed with bad fg_count (%d)", fg, fg->fg_count);
+#endif
if (fp && (fp->f_flags & FP_WRITTEN))
fg->fg_flag |= FWASWRITTEN;
lck_mtx_unlock(&fg->fg_lock);
proc_fdunlock(p);
- error = closef_finish(fp, fg, p);
+ error = closef_finish(fp, fg, p, &context);
proc_fdlock(p);
return(error);
}
+/* sleep address to permit wakeup of select by fileproc_drain() */
extern int selwait;
+
+
+/*
+ * fileproc_drain
+ *
+ * Description: Drain out pending I/O operations
+ *
+ * Parameters: p Process closing this file
+ * fp fileproc struct for the open
+ * instance on the file
+ *
+ * Returns: void
+ *
+ * Locks: Assumes the caller holds the proc_fdlock
+ *
+ * Notes: For character devices, this occurs on the last close of the
+ * device; for all other file descriptos, this occurs on each
+ * close to prevent fd's from being closed out from under
+ * operations currently in progress and blocked
+ *
+ * See Also: file_vnode(), file_socket(), file_drop(), and the cautions
+ * regarding their use and interaction with this function.
+ */
void
-fileproc_drain(struct proc *p, struct fileproc * fp)
+fileproc_drain(proc_t p, struct fileproc * fp)
{
+ struct vfs_context context;
+
+ context.vc_thread = proc_thread(p); /* XXX */
+ context.vc_ucred = fp->f_fglob->fg_cred;
+
fp->f_iocount-- ; /* (the one the close holds) */
while (fp->f_iocount) {
+
+ lck_mtx_convert_spin(&p->p_fdmlock);
+
if (((fp->f_flags & FP_INSELECT)== FP_INSELECT)) {
wait_queue_wakeup_all((wait_queue_t)fp->f_waddr, &selwait, THREAD_INTERRUPTED);
} else {
if (fp->f_fglob->fg_ops->fo_drain) {
- (*fp->f_fglob->fg_ops->fo_drain)(fp, p);
+ (*fp->f_fglob->fg_ops->fo_drain)(fp, &context);
}
}
p->p_fpdrainwait = 1;
- msleep(&p->p_fpdrainwait, &p->p_fdmlock, PRIBIO, "fpdrain",0);
+ msleep(&p->p_fpdrainwait, &p->p_fdmlock, PRIBIO, "fpdrain", NULL);
- //panic("successful wait after drain\n");
}
}
+
+/*
+ * fp_free
+ *
+ * Description: Release the fd and free the fileproc associated with the fd
+ * in the per process open file table of the specified process;
+ * these values must correspond.
+ *
+ * Parameters: p Process containing fd
+ * fd fd to be released
+ * fp fileproc to be freed
+ *
+ * Returns: 0 Success
+ *
+ * Notes: XXX function should be void - no one interprets the returns
+ * XXX code
+ */
int
-fp_free(struct proc * p, int fd, struct fileproc * fp)
+fp_free(proc_t p, int fd, struct fileproc * fp)
{
- proc_fdlock(p);
+ proc_fdlock_spin(p);
fdrelse(p, fd);
proc_fdunlock(p);
fg_free(fp->f_fglob);
- FREE_ZONE(fp, sizeof *fp, M_FILEPROC);
+ FREE_ZONE(fp, sizeof(*fp), M_FILEPROC);
+ return(0);
}
/*
- * Apply an advisory lock on a file descriptor.
+ * flock
+ *
+ * Description: Apply an advisory lock on a file descriptor.
+ *
+ * Parameters: p Process making request
+ * uap->fd fd on which the lock is to be
+ * attempted
+ * uap->how (Un)Lock bits, including type
+ * retval Pointer to the call return area
+ *
+ * Returns: 0 Success
+ * fp_getfvp:EBADF Bad file descriptor
+ * fp_getfvp:ENOTSUP fd does not refer to a vnode
+ * vnode_getwithref:???
+ * VNOP_ADVLOCK:???
*
- * Just attempt to get a record lock of the requested type on
- * the entire file (l_whence = SEEK_SET, l_start = 0, l_len = 0).
+ * Implicit returns:
+ * *retval (modified) Size of dtable
+ *
+ * Notes: Just attempt to get a record lock of the requested type on
+ * the entire file (l_whence = SEEK_SET, l_start = 0, l_len = 0).
*/
int
-flock(struct proc *p, register struct flock_args *uap, __unused register_t *retval)
+flock(proc_t p, struct flock_args *uap, __unused register_t *retval)
{
int fd = uap->fd;
int how = uap->how;
struct fileproc *fp;
struct vnode *vp;
struct flock lf;
- struct vfs_context context;
+ vfs_context_t ctx = vfs_context_current();
int error=0;
AUDIT_ARG(fd, uap->fd);
}
AUDIT_ARG(vnpath, vp, ARG_VNODE1);
- context.vc_proc = p;
- context.vc_ucred = fp->f_cred;
-
lf.l_whence = SEEK_SET;
lf.l_start = 0;
lf.l_len = 0;
if (how & LOCK_UN) {
lf.l_type = F_UNLCK;
fp->f_flag &= ~FHASLOCK;
- error = VNOP_ADVLOCK(vp, (caddr_t)fp->f_fglob, F_UNLCK, &lf, F_FLOCK, &context);
+ error = VNOP_ADVLOCK(vp, (caddr_t)fp->f_fglob, F_UNLCK, &lf, F_FLOCK, ctx);
goto out;
}
if (how & LOCK_EX)
error = EBADF;
goto out;
}
+#if CONFIG_MACF
+ error = mac_file_check_lock(proc_ucred(p), fp->f_fglob, F_SETLK, &lf);
+ if (error)
+ goto out;
+#endif
fp->f_flag |= FHASLOCK;
if (how & LOCK_NB) {
- error = VNOP_ADVLOCK(vp, (caddr_t)fp->f_fglob, F_SETLK, &lf, F_FLOCK, &context);
+ error = VNOP_ADVLOCK(vp, (caddr_t)fp->f_fglob, F_SETLK, &lf, F_FLOCK, ctx);
goto out;
}
- error = VNOP_ADVLOCK(vp, (caddr_t)fp->f_fglob, F_SETLK, &lf, F_FLOCK|F_WAIT, &context);
+ error = VNOP_ADVLOCK(vp, (caddr_t)fp->f_fglob, F_SETLK, &lf, F_FLOCK|F_WAIT, ctx);
out:
(void)vnode_put(vp);
out1:
}
/*
- * File Descriptor pseudo-device driver (/dev/fd/).
+ * dupfdopen
*
- * Opening minor device N dup()s the file (if any) connected to file
- * descriptor N belonging to the calling process. Note that this driver
- * consists of only the ``open()'' routine, because all subsequent
- * references to this file will be direct to the other driver.
- */
-int
-fdopen(dev_t dev, __unused int mode, __unused int type, struct proc *p)
-{
-
- /*
- * XXX Kludge: set curproc->p_dupfd to contain the value of the
- * the file descriptor being sought for duplication. The error
- * return ensures that the vnode for this device will be released
- * by vn_open. Open will detect this special error and take the
- * actions in dupfdopen below. Other callers of vn_open or vnop_open
- * will simply report the error.
- */
- p->p_dupfd = minor(dev);
- return (ENODEV);
-}
-
-/*
- * Duplicate the specified descriptor to a free descriptor.
+ * Description: Duplicate the specified descriptor to a free descriptor;
+ * this is the second half of fdopen(), above.
+ *
+ * Parameters: fdp filedesc pointer to fill in
+ * indx fd to dup to
+ * dfd fd to dup from
+ * mode mode to set on new fd
+ * error command code
+ *
+ * Returns: 0 Success
+ * EBADF Source fd is bad
+ * EACCES Requested mode not allowed
+ * !0 'error', if not ENODEV or
+ * ENXIO
+ *
+ * Notes: XXX This is not thread safe; see fdopen() above
*/
int
-dupfdopen(fdp, indx, dfd, mode, error)
- register struct filedesc *fdp;
- register int indx, dfd;
- int mode;
- int error;
+dupfdopen(struct filedesc *fdp, int indx, int dfd, int mode, int error)
{
struct fileproc *wfp;
struct fileproc *fp;
- struct proc * p = current_proc();
+#if CONFIG_MACF
+ int myerror;
+#endif
+ proc_t p = current_proc();
/*
* If the to-be-dup'd fd number is greater than the allowed number
proc_fdunlock(p);
return (EBADF);
}
+#if CONFIG_MACF
+ myerror = mac_file_check_dup(proc_ucred(p), wfp->f_fglob, dfd);
+ if (myerror) {
+ proc_fdunlock(p);
+ return (myerror);
+ }
+#endif
/*
* There are two cases of interest here.
*
proc_fdunlock(p);
return (0);
- case ENXIO:
- /*
- * Steal away the file pointer from dfd, and stuff it into indx.
- */
- if (indx > fdp->fd_lastfile)
- fdp->fd_lastfile = indx;
-
- if (fp->f_fglob)
- fg_free(fp->f_fglob);
- fp->f_fglob = wfp->f_fglob;
-
- fdp->fd_ofileflags[indx] = fdp->fd_ofileflags[dfd];
- _fdrelse(fdp, dfd);
-
- proc_fdunlock(p);
-
- FREE_ZONE(wfp, sizeof *fp, M_FILEPROC);
-
- return (0);
-
default:
proc_fdunlock(p);
return (error);
/* NOTREACHED */
}
+
+/*
+ * fg_ref
+ *
+ * Description: Add a reference to a fileglob by fileproc
+ *
+ * Parameters: fp fileproc containing fileglob
+ * pointer
+ *
+ * Returns: void
+ *
+ * Notes: XXX Should use OSAddAtomic?
+ */
void
fg_ref(struct fileproc * fp)
{
fg = fp->f_fglob;
- lck_mtx_lock(&fg->fg_lock);
+ lck_mtx_lock_spin(&fg->fg_lock);
+
+#if DIAGNOSTIC
+ if ((fp->f_flags & ~((unsigned int)FP_VALID_FLAGS)) != 0)
+ panic("fg_ref: invalid bits on fp%x\n", (unsigned int)fp);
+
+ if (fg->fg_count == 0)
+ panic("fg_ref: adding fgcount to zeroed fg :fp %x, fg%x\n ", (unsigned int)fp, (unsigned int)fg);
+#endif
fg->fg_count++;
lck_mtx_unlock(&fg->fg_lock);
}
+
+/*
+ * fg_drop
+ *
+ * Description: Remove a reference to a fileglob by fileproc
+ *
+ * Parameters: fp fileproc containing fileglob
+ * pointer
+ *
+ * Returns: void
+ *
+ * Notes: XXX Should use OSAddAtomic?
+ */
void
fg_drop(struct fileproc * fp)
{
struct fileglob *fg;
fg = fp->f_fglob;
- lck_mtx_lock(&fg->fg_lock);
+ lck_mtx_lock_spin(&fg->fg_lock);
fg->fg_count--;
lck_mtx_unlock(&fg->fg_lock);
}
+/*
+ * fg_insertuipc
+ *
+ * Description: Insert fileglob onto message queue
+ *
+ * Parameters: fg Fileglob pointer to insert
+ *
+ * Returns: void
+ *
+ * Locks: Takes and drops fg_lock, potentially many times
+ */
void
fg_insertuipc(struct fileglob * fg)
{
-int insertque = 0;
+ int insertque = 0;
- lck_mtx_lock(&fg->fg_lock);
+ lck_mtx_lock_spin(&fg->fg_lock);
while (fg->fg_lflags & FG_RMMSGQ) {
+ lck_mtx_convert_spin(&fg->fg_lock);
+
fg->fg_lflags |= FG_WRMMSGQ;
- msleep(&fg->fg_lflags, &fg->fg_lock, 0, "fg_insertuipc", 0);
+ msleep(&fg->fg_lflags, &fg->fg_lock, 0, "fg_insertuipc", NULL);
}
fg->fg_count++;
lck_mtx_unlock(&fg->fg_lock);
if (insertque) {
- lck_mtx_lock(uipc_lock);
+ lck_mtx_lock_spin(uipc_lock);
+ unp_gc_wait();
LIST_INSERT_HEAD(&fmsghead, fg, f_msglist);
lck_mtx_unlock(uipc_lock);
lck_mtx_lock(&fg->fg_lock);
}
+
+/*
+ * fg_removeuipc
+ *
+ * Description: Remove fileglob from message queue
+ *
+ * Parameters: fg Fileglob pointer to remove
+ *
+ * Returns: void
+ *
+ * Locks: Takes and drops fg_lock, potentially many times
+ */
void
fg_removeuipc(struct fileglob * fg)
{
-int removeque = 0;
+ int removeque = 0;
- lck_mtx_lock(&fg->fg_lock);
+ lck_mtx_lock_spin(&fg->fg_lock);
while (fg->fg_lflags & FG_INSMSGQ) {
+ lck_mtx_convert_spin(&fg->fg_lock);
+
fg->fg_lflags |= FG_WINSMSGQ;
- msleep(&fg->fg_lflags, &fg->fg_lock, 0, "fg_removeuipc", 0);
+ msleep(&fg->fg_lflags, &fg->fg_lock, 0, "fg_removeuipc", NULL);
}
fg->fg_msgcount--;
if (fg->fg_msgcount == 0) {
lck_mtx_unlock(&fg->fg_lock);
if (removeque) {
- lck_mtx_lock(uipc_lock);
+ lck_mtx_lock_spin(uipc_lock);
+ unp_gc_wait();
LIST_REMOVE(fg, f_msglist);
lck_mtx_unlock(uipc_lock);
lck_mtx_lock(&fg->fg_lock);
}
+/*
+ * fo_read
+ *
+ * Description: Generic fileops read indirected through the fileops pointer
+ * in the fileproc structure
+ *
+ * Parameters: fp fileproc structure pointer
+ * uio user I/O structure pointer
+ * flags FOF_ flags
+ * ctx VFS context for operation
+ *
+ * Returns: 0 Success
+ * !0 Errno from read
+ */
int
-fo_read(struct fileproc *fp, struct uio *uio, kauth_cred_t cred, int flags, struct proc *p)
+fo_read(struct fileproc *fp, struct uio *uio, int flags, vfs_context_t ctx)
{
- return ((*fp->f_ops->fo_read)(fp, uio, cred, flags, p));
+ return ((*fp->f_ops->fo_read)(fp, uio, flags, ctx));
}
+
+/*
+ * fo_write
+ *
+ * Description: Generic fileops write indirected through the fileops pointer
+ * in the fileproc structure
+ *
+ * Parameters: fp fileproc structure pointer
+ * uio user I/O structure pointer
+ * flags FOF_ flags
+ * ctx VFS context for operation
+ *
+ * Returns: 0 Success
+ * !0 Errno from write
+ */
int
-fo_write(struct fileproc *fp, struct uio *uio, kauth_cred_t cred, int flags, struct proc *p)
+fo_write(struct fileproc *fp, struct uio *uio, int flags, vfs_context_t ctx)
{
- return((*fp->f_ops->fo_write)(fp, uio, cred, flags, p));
+ return((*fp->f_ops->fo_write)(fp, uio, flags, ctx));
}
+
+/*
+ * fo_ioctl
+ *
+ * Description: Generic fileops ioctl indirected through the fileops pointer
+ * in the fileproc structure
+ *
+ * Parameters: fp fileproc structure pointer
+ * com ioctl command
+ * data pointer to internalized copy
+ * of user space ioctl command
+ * parameter data in kernel space
+ * ctx VFS context for operation
+ *
+ * Returns: 0 Success
+ * !0 Errno from ioctl
+ *
+ * Locks: The caller is assumed to have held the proc_fdlock; this
+ * function releases and reacquires this lock. If the caller
+ * accesses data protected by this lock prior to calling this
+ * function, it will need to revalidate/reacquire any cached
+ * protected data obtained prior to the call.
+ */
int
-fo_ioctl(struct fileproc *fp, u_long com, caddr_t data, struct proc *p)
+fo_ioctl(struct fileproc *fp, u_long com, caddr_t data, vfs_context_t ctx)
{
-int error;
+ int error;
- proc_fdunlock(p);
- error = (*fp->f_ops->fo_ioctl)(fp, com, data, p);
- proc_fdlock(p);
+ proc_fdunlock(vfs_context_proc(ctx));
+ error = (*fp->f_ops->fo_ioctl)(fp, com, data, ctx);
+ proc_fdlock(vfs_context_proc(ctx));
return(error);
}
+
+/*
+ * fo_select
+ *
+ * Description: Generic fileops select indirected through the fileops pointer
+ * in the fileproc structure
+ *
+ * Parameters: fp fileproc structure pointer
+ * which select which
+ * wql pointer to wait queue list
+ * ctx VFS context for operation
+ *
+ * Returns: 0 Success
+ * !0 Errno from select
+ */
int
-fo_select(struct fileproc *fp, int which, void *wql, struct proc *p)
+fo_select(struct fileproc *fp, int which, void *wql, vfs_context_t ctx)
{
- return((*fp->f_ops->fo_select)(fp, which, wql, p));
+ return((*fp->f_ops->fo_select)(fp, which, wql, ctx));
}
+
+/*
+ * fo_close
+ *
+ * Description: Generic fileops close indirected through the fileops pointer
+ * in the fileproc structure
+ *
+ * Parameters: fp fileproc structure pointer for
+ * file to close
+ * ctx VFS context for operation
+ *
+ * Returns: 0 Success
+ * !0 Errno from close
+ */
int
-fo_close(struct fileglob *fg, struct proc *p)
+fo_close(struct fileglob *fg, vfs_context_t ctx)
{
- return((*fg->fg_ops->fo_close)(fg, p));
+ return((*fg->fg_ops->fo_close)(fg, ctx));
}
+
+/*
+ * fo_kqfilter
+ *
+ * Description: Generic fileops kqueue filter indirected through the fileops
+ * pointer in the fileproc structure
+ *
+ * Parameters: fp fileproc structure pointer
+ * kn pointer to knote to filter on
+ * ctx VFS context for operation
+ *
+ * Returns: 0 Success
+ * !0 Errno from kqueue filter
+ */
int
-fo_kqfilter(struct fileproc *fp, struct knote *kn, struct proc *p)
+fo_kqfilter(struct fileproc *fp, struct knote *kn, vfs_context_t ctx)
{
- return ((*fp->f_ops->fo_kqfilter)(fp, kn, p));
+ return ((*fp->f_ops->fo_kqfilter)(fp, kn, ctx));
}
-
projects / apple / xnu.git / blobdiff