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The NAND Flash environment consists of several distinct components: - NAND framework (drivers harness for NAND controllers and NAND chips) - NAND simulator (NANDsim) - NAND file system (NAND FS) - Companion tools and utilities - Documentation (manual pages) This work is still experimental. Please use with caution. Obtained from: Semihalf Supported by: FreeBSD Foundation, Juniper Networks
248 lines
5.6 KiB
C
248 lines
5.6 KiB
C
/*-
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* Copyright (c) 2010-2012 Semihalf.
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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 <assert.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <sys/stdint.h>
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#include <sys/ucred.h>
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#include <sys/disk.h>
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#include <sys/mount.h>
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#include <fs/nandfs/nandfs_fs.h>
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#include <libnandfs.h>
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#define NANDFS_IS_VALID 0x1
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#define NANDFS_IS_OPENED 0x2
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#define NANDFS_IS_OPENED_DEV 0x4
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#define NANDFS_IS_ERROR 0x8
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#define DEBUG
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#undef DEBUG
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#ifdef DEBUG
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#define NANDFS_DEBUG(fmt, args...) do { \
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printf("libnandfs:" fmt "\n", ##args); } while (0)
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#else
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#define NANDFS_DEBUG(fmt, args...)
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#endif
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#define NANDFS_ASSERT_VALID(fs) assert((fs)->n_flags & NANDFS_IS_VALID)
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#define NANDFS_ASSERT_VALID_DEV(fs) \
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assert(((fs)->n_flags & (NANDFS_IS_VALID | NANDFS_IS_OPENED_DEV)) == \
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(NANDFS_IS_VALID | NANDFS_IS_OPENED_DEV))
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int
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nandfs_iserror(struct nandfs *fs)
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{
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NANDFS_ASSERT_VALID(fs);
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return (fs->n_flags & NANDFS_IS_ERROR);
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}
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const char *
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nandfs_errmsg(struct nandfs *fs)
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{
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NANDFS_ASSERT_VALID(fs);
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assert(nandfs_iserror(fs));
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assert(fs->n_errmsg);
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return (fs->n_errmsg);
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}
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static void
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nandfs_seterr(struct nandfs *fs, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(fs->n_errmsg, sizeof(fs->n_errmsg), fmt, ap);
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va_end(ap);
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fs->n_flags |= NANDFS_IS_ERROR;
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}
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const char *
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nandfs_dev(struct nandfs *fs)
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{
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NANDFS_ASSERT_VALID(fs);
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return (fs->n_dev);
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}
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void
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nandfs_init(struct nandfs *fs, const char *dir)
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{
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snprintf(fs->n_ioc, sizeof(fs->n_ioc), "%s/%s", dir, ".");
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fs->n_iocfd = -1;
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fs->n_flags = NANDFS_IS_VALID;
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}
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void
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nandfs_destroy(struct nandfs *fs)
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{
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assert(fs->n_iocfd == -1);
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fs->n_flags &=
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~(NANDFS_IS_ERROR | NANDFS_IS_VALID);
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assert(fs->n_flags == 0);
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}
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int
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nandfs_open(struct nandfs *fs)
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{
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struct nandfs_fsinfo fsinfo;
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fs->n_flags |= NANDFS_IS_OPENED;
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fs->n_iocfd = open(fs->n_ioc, O_RDONLY, S_IRUSR | S_IWUSR | S_IRGRP |
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S_IWGRP | S_IROTH | S_IWOTH);
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if (fs->n_iocfd == -1) {
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nandfs_seterr(fs, "couldn't open %s: %s", fs->n_ioc,
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strerror(errno));
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return (-1);
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}
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if (ioctl(fs->n_iocfd, NANDFS_IOCTL_GET_FSINFO, &fsinfo) == -1) {
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nandfs_seterr(fs, "couldn't fetch fsinfo: %s",
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strerror(errno));
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return (-1);
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}
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memcpy(&fs->n_fsdata, &fsinfo.fs_fsdata, sizeof(fs->n_fsdata));
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memcpy(&fs->n_sb, &fsinfo.fs_super, sizeof(fs->n_sb));
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snprintf(fs->n_dev, sizeof(fs->n_dev), "%s", fsinfo.fs_dev);
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return (0);
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}
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void
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nandfs_close(struct nandfs *fs)
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{
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NANDFS_ASSERT_VALID(fs);
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assert(fs->n_flags & NANDFS_IS_OPENED);
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close(fs->n_iocfd);
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fs->n_iocfd = -1;
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fs->n_flags &= ~NANDFS_IS_OPENED;
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}
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int
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nandfs_get_cpstat(struct nandfs *fs, struct nandfs_cpstat *cpstat)
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{
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NANDFS_ASSERT_VALID(fs);
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if (ioctl(fs->n_iocfd, NANDFS_IOCTL_GET_CPSTAT, cpstat) == -1) {
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nandfs_seterr(fs, "ioctl NANDFS_IOCTL_GET_CPSTAT: %s",
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strerror(errno));
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return (-1);
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}
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return (0);
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}
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static ssize_t
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nandfs_get_cpinfo(struct nandfs *fs, uint64_t cno, int mode,
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struct nandfs_cpinfo *cpinfo, size_t nci)
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{
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struct nandfs_argv args;
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NANDFS_ASSERT_VALID(fs);
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args.nv_base = (u_long)cpinfo;
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args.nv_nmembs = nci;
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args.nv_index = cno;
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args.nv_flags = mode;
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if (ioctl(fs->n_iocfd, NANDFS_IOCTL_GET_CPINFO, &args) == -1) {
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nandfs_seterr(fs, "ioctl NANDFS_IOCTL_GET_CPINFO: %s",
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strerror(errno));
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return (-1);
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}
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return (args.nv_nmembs);
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}
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ssize_t
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nandfs_get_cp(struct nandfs *fs, uint64_t cno, struct nandfs_cpinfo *cpinfo,
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size_t nci)
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{
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return (nandfs_get_cpinfo(fs, cno, NANDFS_CHECKPOINT, cpinfo, nci));
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}
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ssize_t
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nandfs_get_snap(struct nandfs *fs, uint64_t cno, struct nandfs_cpinfo *cpinfo,
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size_t nci)
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{
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return (nandfs_get_cpinfo(fs, cno, NANDFS_SNAPSHOT, cpinfo, nci));
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}
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int
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nandfs_make_snap(struct nandfs *fs, uint64_t *cno)
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{
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NANDFS_ASSERT_VALID(fs);
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if (ioctl(fs->n_iocfd, NANDFS_IOCTL_MAKE_SNAP, cno) == -1) {
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nandfs_seterr(fs, "ioctl NANDFS_IOCTL_MAKE_SNAP: %s",
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strerror(errno));
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return (-1);
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}
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return (0);
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}
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int
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nandfs_delete_snap(struct nandfs *fs, uint64_t cno)
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{
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NANDFS_ASSERT_VALID(fs);
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if (ioctl(fs->n_iocfd, NANDFS_IOCTL_DELETE_SNAP, &cno) == -1) {
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nandfs_seterr(fs, "ioctl NANDFS_IOCTL_DELETE_SNAP: %s",
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strerror(errno));
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return (-1);
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}
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return (0);
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}
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