97cbd5e722
Summary: Open file list is currently created as statically allocated array (64 items). Once this array is filled up, loader will not be able to operate with files. In most cases, this mechanism is good enough, but the problem appears, when we have many disks with zfs pool(s). In current loader implementation, all discovered zfs pool configurations are kept in memory and disk devices open - consuming the open file array. Rewrite the open file mechanism to use dynamically allocated list. Reviewed by: imp MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D31364
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*-
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* Copyright (c) 1999,2000 Jonathan Lemon <jlemon@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include "stand.h"
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struct dirent *
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readdirfd(int fd)
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{
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static struct dirent dir; /* XXX not thread safe */
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struct open_file *f;
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f = fd2open_file(fd);
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if (f == NULL || !(f->f_flags & F_READ)) {
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errno = EBADF;
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return (NULL);
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}
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if (f->f_flags & F_RAW) {
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errno = EIO;
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return (NULL);
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}
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errno = (f->f_ops->fo_readdir)(f, &dir);
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if (errno)
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return (NULL);
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return (&dir);
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}
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