1*019c3c43Sraf /*
2*019c3c43Sraf * CDDL HEADER START
3*019c3c43Sraf *
4*019c3c43Sraf * The contents of this file are subject to the terms of the
5*019c3c43Sraf * Common Development and Distribution License (the "License").
6*019c3c43Sraf * You may not use this file except in compliance with the License.
7*019c3c43Sraf *
8*019c3c43Sraf * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*019c3c43Sraf * or http://www.opensolaris.org/os/licensing.
10*019c3c43Sraf * See the License for the specific language governing permissions
11*019c3c43Sraf * and limitations under the License.
12*019c3c43Sraf *
13*019c3c43Sraf * When distributing Covered Code, include this CDDL HEADER in each
14*019c3c43Sraf * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*019c3c43Sraf * If applicable, add the following below this CDDL HEADER, with the
16*019c3c43Sraf * fields enclosed by brackets "[]" replaced with your own identifying
17*019c3c43Sraf * information: Portions Copyright [yyyy] [name of copyright owner]
18*019c3c43Sraf *
19*019c3c43Sraf * CDDL HEADER END
20*019c3c43Sraf */
21*019c3c43Sraf
22*019c3c43Sraf /*
23*019c3c43Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24*019c3c43Sraf * Use is subject to license terms.
25*019c3c43Sraf */
26*019c3c43Sraf
27*019c3c43Sraf #include "lint.h"
28*019c3c43Sraf #include <fcntl.h>
29*019c3c43Sraf #include <errno.h>
30*019c3c43Sraf #include <sys/types.h>
31*019c3c43Sraf #include <sys/stat.h>
32*019c3c43Sraf
33*019c3c43Sraf /*
34*019c3c43Sraf * Return the proper Posix error number for a failed (EINVAL) fcntl() operation.
35*019c3c43Sraf */
36*019c3c43Sraf static int
fallocate_errno(int fd)37*019c3c43Sraf fallocate_errno(int fd)
38*019c3c43Sraf {
39*019c3c43Sraf struct stat64 statb;
40*019c3c43Sraf int error;
41*019c3c43Sraf
42*019c3c43Sraf if (fstat64(fd, &statb) != 0) /* can't happen? */
43*019c3c43Sraf error = EBADF;
44*019c3c43Sraf else if (S_ISFIFO(statb.st_mode)) /* pipe or FIFO */
45*019c3c43Sraf error = ESPIPE;
46*019c3c43Sraf else if (!S_ISREG(statb.st_mode)) /* not a regular file */
47*019c3c43Sraf error = ENODEV;
48*019c3c43Sraf else /* the file system doesn't support F_ALLOCSP */
49*019c3c43Sraf error = EINVAL;
50*019c3c43Sraf
51*019c3c43Sraf return (error);
52*019c3c43Sraf }
53*019c3c43Sraf
54*019c3c43Sraf int
posix_fallocate(int fd,off_t offset,off_t len)55*019c3c43Sraf posix_fallocate(int fd, off_t offset, off_t len)
56*019c3c43Sraf {
57*019c3c43Sraf struct flock lck;
58*019c3c43Sraf int error;
59*019c3c43Sraf
60*019c3c43Sraf if (offset < 0 || len <= 0)
61*019c3c43Sraf return (EINVAL);
62*019c3c43Sraf
63*019c3c43Sraf lck.l_whence = 0;
64*019c3c43Sraf lck.l_start = offset;
65*019c3c43Sraf lck.l_len = len;
66*019c3c43Sraf lck.l_type = F_WRLCK;
67*019c3c43Sraf
68*019c3c43Sraf if (fcntl(fd, F_ALLOCSP, &lck) == -1) {
69*019c3c43Sraf if ((error = errno) == EINVAL)
70*019c3c43Sraf error = fallocate_errno(fd);
71*019c3c43Sraf else if (error == EOVERFLOW)
72*019c3c43Sraf error = EFBIG;
73*019c3c43Sraf return (error);
74*019c3c43Sraf }
75*019c3c43Sraf return (0);
76*019c3c43Sraf }
77*019c3c43Sraf
78*019c3c43Sraf #if !defined(_LP64)
79*019c3c43Sraf
80*019c3c43Sraf int
posix_fallocate64(int fd,off64_t offset,off64_t len)81*019c3c43Sraf posix_fallocate64(int fd, off64_t offset, off64_t len)
82*019c3c43Sraf {
83*019c3c43Sraf struct flock64 lck;
84*019c3c43Sraf int error;
85*019c3c43Sraf
86*019c3c43Sraf if (offset < 0 || len <= 0)
87*019c3c43Sraf return (EINVAL);
88*019c3c43Sraf
89*019c3c43Sraf lck.l_whence = 0;
90*019c3c43Sraf lck.l_start = offset;
91*019c3c43Sraf lck.l_len = len;
92*019c3c43Sraf lck.l_type = F_WRLCK;
93*019c3c43Sraf
94*019c3c43Sraf if (fcntl(fd, F_ALLOCSP64, &lck) == -1) {
95*019c3c43Sraf if ((error = errno) == EINVAL)
96*019c3c43Sraf error = fallocate_errno(fd);
97*019c3c43Sraf else if (error == EOVERFLOW)
98*019c3c43Sraf error = EFBIG;
99*019c3c43Sraf return (error);
100*019c3c43Sraf }
101*019c3c43Sraf return (0);
102*019c3c43Sraf }
103*019c3c43Sraf
104*019c3c43Sraf #endif
105