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freebsd-skq/sbin/newfs_nandfs/newfs_nandfs.c
Pedro F. Giffuni 1de7b4b805 various: general adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2010-2012 Semihalf.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/fdcio.h>
#include <sys/disk.h>
#include <sys/disklabel.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/endian.h>
#include <sys/stddef.h>
#include <sys/uuid.h>
#include <sys/dirent.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <libgeom.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <fs/nandfs/nandfs_fs.h>
#include <dev/nand/nand_dev.h>
#define DEBUG
#undef DEBUG
#ifdef DEBUG
#define debug(fmt, args...) do { \
printf("nandfs:" fmt "\n", ##args); } while (0)
#else
#define debug(fmt, args...)
#endif
#define NANDFS_FIRST_BLOCK nandfs_first_block()
#define NANDFS_FIRST_CNO 1
#define NANDFS_BLOCK_BAD 1
#define NANDFS_BLOCK_GOOD 0
struct file_info {
uint64_t ino;
const char *name;
uint32_t mode;
uint64_t size;
uint8_t nblocks;
uint32_t *blocks;
struct nandfs_inode *inode;
};
static struct file_info user_files[] = {
{ NANDFS_ROOT_INO, NULL, S_IFDIR | 0755, 0, 1, NULL, NULL },
};
static struct file_info ifile =
{ NANDFS_IFILE_INO, NULL, 0, 0, -1, NULL, NULL };
static struct file_info sufile =
{ NANDFS_SUFILE_INO, NULL, 0, 0, -1, NULL, NULL };
static struct file_info cpfile =
{ NANDFS_CPFILE_INO, NULL, 0, 0, -1, NULL, NULL };
static struct file_info datfile =
{ NANDFS_DAT_INO, NULL, 0, 0, -1, NULL, NULL };
struct nandfs_block {
LIST_ENTRY(nandfs_block) block_link;
uint32_t number;
uint64_t offset;
void *data;
};
static LIST_HEAD(, nandfs_block) block_head =
LIST_HEAD_INITIALIZER(&block_head);
/* Storage geometry */
static off_t mediasize;
static ssize_t sectorsize;
static uint64_t nsegments;
static uint64_t erasesize;
static uint64_t segsize;
static struct nandfs_fsdata fsdata;
static struct nandfs_super_block super_block;
static int is_nand;
/* Nandfs parameters */
static size_t blocksize = NANDFS_DEF_BLOCKSIZE;
static long blocks_per_segment;
static long rsv_segment_percent = 5;
static time_t nandfs_time;
static uint32_t bad_segments_count = 0;
static uint32_t *bad_segments = NULL;
static uint8_t fsdata_blocks_state[NANDFS_NFSAREAS];
static u_char *volumelabel = NULL;
static struct nandfs_super_root *sr;
static uint32_t nuserfiles;
static uint32_t seg_nblocks;
static uint32_t seg_endblock;
#define SIZE_TO_BLOCK(size) howmany(size, blocksize)
static uint32_t
nandfs_first_block(void)
{
uint32_t i, first_free, start_bad_segments = 0;
for (i = 0; i < bad_segments_count; i++) {
if (i == bad_segments[i])
start_bad_segments++;
else
break;
}
first_free = SIZE_TO_BLOCK(NANDFS_DATA_OFFSET_BYTES(erasesize) +
(start_bad_segments * segsize));
if (first_free < (uint32_t)blocks_per_segment)
return (blocks_per_segment);
else
return (first_free);
}
static void
usage(void)
{
fprintf(stderr,
"usage: newfs_nandfs [ -options ] device\n"
"where the options are:\n"
"\t-b block-size\n"
"\t-B blocks-per-segment\n"
"\t-L volume label\n"
"\t-m reserved-segments-percentage\n");
exit(1);
}
static int
nandfs_log2(unsigned n)
{
unsigned count;
/*
* N.B. this function will return 0 if supplied 0.
*/
for (count = 0; n/2; count++)
n /= 2;
return count;
}
/* from NetBSD's src/sys/net/if_ethersubr.c */
static uint32_t
crc32_le(uint32_t crc, const uint8_t *buf, size_t len)
{
static const uint32_t crctab[] = {
0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
};
size_t i;
crc = crc ^ ~0U;
for (i = 0; i < len; i++) {
crc ^= buf[i];
crc = (crc >> 4) ^ crctab[crc & 0xf];
crc = (crc >> 4) ^ crctab[crc & 0xf];
}
return (crc ^ ~0U);
}
static void *
get_block(uint32_t block_nr, uint64_t offset)
{
struct nandfs_block *block, *new_block;
LIST_FOREACH(block, &block_head, block_link) {
if (block->number == block_nr)
return block->data;
}
debug("allocating block %x\n", block_nr);
new_block = malloc(sizeof(*block));
if (!new_block)
err(1, "cannot allocate block");
new_block->number = block_nr;
new_block->offset = offset;
new_block->data = malloc(blocksize);
if (!new_block->data)
err(1, "cannot allocate block data");
memset(new_block->data, 0, blocksize);
LIST_INSERT_HEAD(&block_head, new_block, block_link);
return (new_block->data);
}
static int
nandfs_seg_usage_blk_offset(uint64_t seg, uint64_t *blk, uint64_t *offset)
{
uint64_t off;
uint16_t seg_size;
seg_size = sizeof(struct nandfs_segment_usage);
off = roundup(sizeof(struct nandfs_sufile_header), seg_size);
off += (seg * seg_size);
*blk = off / blocksize;
*offset = (off % blocksize) / seg_size;
return (0);
}
static uint32_t
segment_size(void)
{
u_int size;
size = sizeof(struct nandfs_segment_summary );
size += seg_nblocks * sizeof(struct nandfs_binfo_v);
if (size > blocksize)
err(1, "segsum info bigger that blocksize");
return (size);
}
static void
prepare_blockgrouped_file(uint32_t block)
{
struct nandfs_block_group_desc *desc;
uint32_t i, entries;
desc = (struct nandfs_block_group_desc *)get_block(block, 0);
entries = blocksize / sizeof(struct nandfs_block_group_desc);
for (i = 0; i < entries; i++)
desc[i].bg_nfrees = blocksize * 8;
}
static void
alloc_blockgrouped_file(uint32_t block, uint32_t entry)
{
struct nandfs_block_group_desc *desc;
uint32_t desc_nr;
uint32_t *bitmap;
desc = (struct nandfs_block_group_desc *)get_block(block, 0);
bitmap = (uint32_t *)get_block(block + 1, 1);
bitmap += (entry >> 5);
if (*bitmap & (1 << (entry % 32))) {
printf("nandfs: blockgrouped entry %d already allocated\n",
entry);
}
*bitmap |= (1 << (entry % 32));
desc_nr = entry / (blocksize * 8);
desc[desc_nr].bg_nfrees--;
}
static uint64_t
count_su_blocks(void)
{
uint64_t maxblk, blk, offset, i;
maxblk = blk = 0;
for (i = 0; i < bad_segments_count; i++) {
nandfs_seg_usage_blk_offset(bad_segments[i], &blk, &offset);
debug("bad segment at block:%jx off: %jx", blk, offset);
if (blk > maxblk)
maxblk = blk;
}
debug("bad segment needs %#jx", blk);
if (blk >= NANDFS_NDADDR) {
printf("nandfs: file too big (%jd > %d)\n", blk, NANDFS_NDADDR);
exit(2);
}
sufile.size = (blk + 1) * blocksize;
return (blk + 1);
}
static void
count_seg_blocks(void)
{
uint32_t i;
for (i = 0; i < nuserfiles; i++)
if (user_files[i].nblocks) {
seg_nblocks += user_files[i].nblocks;
user_files[i].blocks = malloc(user_files[i].nblocks * sizeof(uint32_t));
}
ifile.nblocks = 2 +
SIZE_TO_BLOCK(sizeof(struct nandfs_inode) * (NANDFS_USER_INO + 1));
ifile.blocks = malloc(ifile.nblocks * sizeof(uint32_t));
seg_nblocks += ifile.nblocks;
cpfile.nblocks =
SIZE_TO_BLOCK((NANDFS_CPFILE_FIRST_CHECKPOINT_OFFSET + 1) *
sizeof(struct nandfs_checkpoint));
cpfile.blocks = malloc(cpfile.nblocks * sizeof(uint32_t));
seg_nblocks += cpfile.nblocks;
if (!bad_segments) {
sufile.nblocks =
SIZE_TO_BLOCK((NANDFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET + 1) *
sizeof(struct nandfs_segment_usage));
} else {
debug("bad blocks found: extra space for sufile");
sufile.nblocks = count_su_blocks();
}
sufile.blocks = malloc(sufile.nblocks * sizeof(uint32_t));
seg_nblocks += sufile.nblocks;
datfile.nblocks = 2 +
SIZE_TO_BLOCK((seg_nblocks) * sizeof(struct nandfs_dat_entry));
datfile.blocks = malloc(datfile.nblocks * sizeof(uint32_t));
seg_nblocks += datfile.nblocks;
}
static void
assign_file_blocks(uint64_t start_block)
{
uint32_t i, j;
for (i = 0; i < nuserfiles; i++)
for (j = 0; j < user_files[i].nblocks; j++) {
debug("user file %d at block %d at %#jx",
i, j, (uintmax_t)start_block);
user_files[i].blocks[j] = start_block++;
}
for (j = 0; j < ifile.nblocks; j++) {
debug("ifile block %d at %#jx", j, (uintmax_t)start_block);
ifile.blocks[j] = start_block++;
}
for (j = 0; j < cpfile.nblocks; j++) {
debug("cpfile block %d at %#jx", j, (uintmax_t)start_block);
cpfile.blocks[j] = start_block++;
}
for (j = 0; j < sufile.nblocks; j++) {
debug("sufile block %d at %#jx", j, (uintmax_t)start_block);
sufile.blocks[j] = start_block++;
}
for (j = 0; j < datfile.nblocks; j++) {
debug("datfile block %d at %#jx", j, (uintmax_t)start_block);
datfile.blocks[j] = start_block++;
}
/* add one for superroot */
debug("sr at block %#jx", (uintmax_t)start_block);
sr = (struct nandfs_super_root *)get_block(start_block++, 0);
seg_endblock = start_block;
}
static void
save_datfile(void)
{
prepare_blockgrouped_file(datfile.blocks[0]);
}
static uint64_t
update_datfile(uint64_t block)
{
struct nandfs_dat_entry *dat;
static uint64_t vblock = 0;
uint64_t allocated, i, off;
if (vblock == 0) {
alloc_blockgrouped_file(datfile.blocks[0], vblock);
vblock++;
}
allocated = vblock;
i = vblock / (blocksize / sizeof(*dat));
off = vblock % (blocksize / sizeof(*dat));
vblock++;
dat = (struct nandfs_dat_entry *)get_block(datfile.blocks[2 + i], 2 + i);
alloc_blockgrouped_file(datfile.blocks[0], allocated);
dat[off].de_blocknr = block;
dat[off].de_start = NANDFS_FIRST_CNO;
dat[off].de_end = UINTMAX_MAX;
return (allocated);
}
static union nandfs_binfo *
update_block_info(union nandfs_binfo *binfo, struct file_info *file)
{
nandfs_daddr_t vblock;
uint32_t i;
for (i = 0; i < file->nblocks; i++) {
debug("%s: blk %x", __func__, i);
if (file->ino != NANDFS_DAT_INO) {
vblock = update_datfile(file->blocks[i]);
binfo->bi_v.bi_vblocknr = vblock;
binfo->bi_v.bi_blkoff = i;
binfo->bi_v.bi_ino = file->ino;
file->inode->i_db[i] = vblock;
} else {
binfo->bi_dat.bi_blkoff = i;
binfo->bi_dat.bi_ino = file->ino;
file->inode->i_db[i] = datfile.blocks[i];
}
binfo++;
}
return (binfo);
}
static void
save_segsum(struct nandfs_segment_summary *ss)
{
union nandfs_binfo *binfo;
struct nandfs_block *block;
uint32_t sum_bytes, i;
uint8_t crc_data, crc_skip;
sum_bytes = segment_size();
ss->ss_magic = NANDFS_SEGSUM_MAGIC;
ss->ss_bytes = sizeof(struct nandfs_segment_summary);
ss->ss_flags = NANDFS_SS_LOGBGN | NANDFS_SS_LOGEND | NANDFS_SS_SR;
ss->ss_seq = 1;
ss->ss_create = nandfs_time;
ss->ss_next = nandfs_first_block() + blocks_per_segment;
/* nblocks = segment blocks + segsum block + superroot */
ss->ss_nblocks = seg_nblocks + 2;
ss->ss_nbinfos = seg_nblocks;
ss->ss_sumbytes = sum_bytes;
crc_skip = sizeof(ss->ss_datasum) + sizeof(ss->ss_sumsum);
ss->ss_sumsum = crc32_le(0, (uint8_t *)ss + crc_skip,
sum_bytes - crc_skip);
crc_data = 0;
binfo = (union nandfs_binfo *)(ss + 1);
for (i = 0; i < nuserfiles; i++) {
if (user_files[i].nblocks)
binfo = update_block_info(binfo, &user_files[i]);
}
binfo = update_block_info(binfo, &ifile);
binfo = update_block_info(binfo, &cpfile);
binfo = update_block_info(binfo, &sufile);
update_block_info(binfo, &datfile);
/* save superroot crc */
crc_skip = sizeof(sr->sr_sum);
sr->sr_sum = crc32_le(0, (uint8_t *)sr + crc_skip,
NANDFS_SR_BYTES - crc_skip);
/* segment checksup */
crc_skip = sizeof(ss->ss_datasum);
LIST_FOREACH(block, &block_head, block_link) {
if (block->number < NANDFS_FIRST_BLOCK)
continue;
if (block->number == NANDFS_FIRST_BLOCK)
crc_data = crc32_le(0,
(uint8_t *)block->data + crc_skip,
blocksize - crc_skip);
else
crc_data = crc32_le(crc_data, (uint8_t *)block->data,
blocksize);
}
ss->ss_datasum = crc_data;
}
static void
create_fsdata(void)
{
struct uuid tmp;
memset(&fsdata, 0, sizeof(struct nandfs_fsdata));
fsdata.f_magic = NANDFS_FSDATA_MAGIC;
fsdata.f_nsegments = nsegments;
fsdata.f_erasesize = erasesize;
fsdata.f_first_data_block = NANDFS_FIRST_BLOCK;
fsdata.f_blocks_per_segment = blocks_per_segment;
fsdata.f_r_segments_percentage = rsv_segment_percent;
fsdata.f_rev_level = NANDFS_CURRENT_REV;
fsdata.f_sbbytes = NANDFS_SB_BYTES;
fsdata.f_bytes = NANDFS_FSDATA_CRC_BYTES;
fsdata.f_ctime = nandfs_time;
fsdata.f_log_block_size = nandfs_log2(blocksize) - 10;
fsdata.f_errors = 1;
fsdata.f_inode_size = sizeof(struct nandfs_inode);
fsdata.f_dat_entry_size = sizeof(struct nandfs_dat_entry);
fsdata.f_checkpoint_size = sizeof(struct nandfs_checkpoint);
fsdata.f_segment_usage_size = sizeof(struct nandfs_segment_usage);
uuidgen(&tmp, 1);
fsdata.f_uuid = tmp;
if (volumelabel)
memcpy(fsdata.f_volume_name, volumelabel, 16);
fsdata.f_sum = crc32_le(0, (const uint8_t *)&fsdata,
NANDFS_FSDATA_CRC_BYTES);
}
static void
save_fsdata(void *data)
{
memcpy(data, &fsdata, sizeof(fsdata));
}
static void
create_super_block(void)
{
memset(&super_block, 0, sizeof(struct nandfs_super_block));
super_block.s_magic = NANDFS_SUPER_MAGIC;
super_block.s_last_cno = NANDFS_FIRST_CNO;
super_block.s_last_pseg = NANDFS_FIRST_BLOCK;
super_block.s_last_seq = 1;
super_block.s_free_blocks_count =
(nsegments - bad_segments_count) * blocks_per_segment;
super_block.s_mtime = 0;
super_block.s_wtime = nandfs_time;
super_block.s_state = NANDFS_VALID_FS;
super_block.s_sum = crc32_le(0, (const uint8_t *)&super_block,
NANDFS_SB_BYTES);
}
static void
save_super_block(void *data)
{
memcpy(data, &super_block, sizeof(super_block));
}
static void
save_super_root(void)
{
sr->sr_bytes = NANDFS_SR_BYTES;
sr->sr_flags = 0;
sr->sr_nongc_ctime = nandfs_time;
datfile.inode = &sr->sr_dat;
cpfile.inode = &sr->sr_cpfile;
sufile.inode = &sr->sr_sufile;
}
static struct nandfs_dir_entry *
add_de(void *block, struct nandfs_dir_entry *de, uint64_t ino,
const char *name, uint8_t type)
{
uint16_t reclen;
/* modify last de */
de->rec_len = NANDFS_DIR_REC_LEN(de->name_len);
de = (void *)((uint8_t *)de + de->rec_len);
reclen = blocksize - ((uintptr_t)de - (uintptr_t)block);
if (reclen < NANDFS_DIR_REC_LEN(strlen(name))) {
printf("nandfs: too many dir entries for one block\n");
return (NULL);
}
de->inode = ino;
de->rec_len = reclen;
de->name_len = strlen(name);
de->file_type = type;
memset(de->name, 0,
(strlen(name) + NANDFS_DIR_PAD - 1) & ~NANDFS_DIR_ROUND);
memcpy(de->name, name, strlen(name));
return (de);
}
static struct nandfs_dir_entry *
make_dir(void *block, uint64_t ino, uint64_t parent_ino)
{
struct nandfs_dir_entry *de = (struct nandfs_dir_entry *)block;
/* create '..' entry */
de->inode = parent_ino;
de->rec_len = NANDFS_DIR_REC_LEN(2);
de->name_len = 2;
de->file_type = DT_DIR;
memset(de->name, 0, NANDFS_DIR_NAME_LEN(2));
memcpy(de->name, "..", 2);
/* create '.' entry */
de = (void *)((uint8_t *)block + NANDFS_DIR_REC_LEN(2));
de->inode = ino;
de->rec_len = blocksize - NANDFS_DIR_REC_LEN(2);
de->name_len = 1;
de->file_type = DT_DIR;
memset(de->name, 0, NANDFS_DIR_NAME_LEN(1));
memcpy(de->name, ".", 1);
return (de);
}
static void
save_root_dir(void)
{
struct file_info *root = &user_files[0];
struct nandfs_dir_entry *de;
uint32_t i;
void *block;
block = get_block(root->blocks[0], 0);
de = make_dir(block, root->ino, root->ino);
for (i = 1; i < nuserfiles; i++)
de = add_de(block, de, user_files[i].ino, user_files[i].name,
IFTODT(user_files[i].mode));
root->size = ((uintptr_t)de - (uintptr_t)block) +
NANDFS_DIR_REC_LEN(de->name_len);
}
static void
save_sufile(void)
{
struct nandfs_sufile_header *header;
struct nandfs_segment_usage *su;
uint64_t blk, i, off;
void *block;
int start;
/*
* At the beginning just zero-out everything
*/
for (i = 0; i < sufile.nblocks; i++)
get_block(sufile.blocks[i], 0);
start = 0;
block = get_block(sufile.blocks[start], 0);
header = (struct nandfs_sufile_header *)block;
header->sh_ncleansegs = nsegments - bad_segments_count - 1;
header->sh_ndirtysegs = 1;
header->sh_last_alloc = 1;
su = (struct nandfs_segment_usage *)header;
off = NANDFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET;
/* Allocate data segment */
su[off].su_lastmod = nandfs_time;
/* nblocks = segment blocks + segsum block + superroot */
su[off].su_nblocks = seg_nblocks + 2;
su[off].su_flags = NANDFS_SEGMENT_USAGE_DIRTY;
off++;
/* Allocate next segment */
su[off].su_lastmod = nandfs_time;
su[off].su_nblocks = 0;
su[off].su_flags = NANDFS_SEGMENT_USAGE_DIRTY;
for (i = 0; i < bad_segments_count; i++) {
nandfs_seg_usage_blk_offset(bad_segments[i], &blk, &off);
debug("storing bad_segments[%jd]=%x at %jx off %jx\n", i,
bad_segments[i], blk, off);
block = get_block(sufile.blocks[blk],
off * sizeof(struct nandfs_segment_usage *));
su = (struct nandfs_segment_usage *)block;
su[off].su_lastmod = nandfs_time;
su[off].su_nblocks = 0;
su[off].su_flags = NANDFS_SEGMENT_USAGE_ERROR;
}
}
static void
save_cpfile(void)
{
struct nandfs_cpfile_header *header;
struct nandfs_checkpoint *cp, *initial_cp;
int i, entries = blocksize / sizeof(struct nandfs_checkpoint);
uint64_t cno;
header = (struct nandfs_cpfile_header *)get_block(cpfile.blocks[0], 0);
header->ch_ncheckpoints = 1;
header->ch_nsnapshots = 0;
cp = (struct nandfs_checkpoint *)header;
/* fill first checkpoint data*/
initial_cp = &cp[NANDFS_CPFILE_FIRST_CHECKPOINT_OFFSET];
initial_cp->cp_flags = 0;
initial_cp->cp_checkpoints_count = 0;
initial_cp->cp_cno = NANDFS_FIRST_CNO;
initial_cp->cp_create = nandfs_time;
initial_cp->cp_nblk_inc = seg_endblock - 1;
initial_cp->cp_blocks_count = seg_nblocks;
memset(&initial_cp->cp_snapshot_list, 0,
sizeof(struct nandfs_snapshot_list));
ifile.inode = &initial_cp->cp_ifile_inode;
/* mark rest of cp as invalid */
cno = NANDFS_FIRST_CNO + 1;
i = NANDFS_CPFILE_FIRST_CHECKPOINT_OFFSET + 1;
for (; i < entries; i++) {
cp[i].cp_cno = cno++;
cp[i].cp_flags = NANDFS_CHECKPOINT_INVALID;
}
}
static void
init_inode(struct nandfs_inode *inode, struct file_info *file)
{
inode->i_blocks = file->nblocks;
inode->i_ctime = nandfs_time;
inode->i_mtime = nandfs_time;
inode->i_mode = file->mode & 0xffff;
inode->i_links_count = 1;
if (file->size > 0)
inode->i_size = file->size;
else
inode->i_size = 0;
if (file->ino == NANDFS_USER_INO)
inode->i_flags = SF_NOUNLINK|UF_NOUNLINK;
else
inode->i_flags = 0;
}
static void
save_ifile(void)
{
struct nandfs_inode *inode;
struct file_info *file;
uint64_t ino, blk, off;
uint32_t i;
prepare_blockgrouped_file(ifile.blocks[0]);
for (i = 0; i <= NANDFS_USER_INO; i++)
alloc_blockgrouped_file(ifile.blocks[0], i);
for (i = 0; i < nuserfiles; i++) {
file = &user_files[i];
ino = file->ino;
blk = ino / (blocksize / sizeof(*inode));
off = ino % (blocksize / sizeof(*inode));
inode =
(struct nandfs_inode *)get_block(ifile.blocks[2 + blk], 2 + blk);
file->inode = &inode[off];
init_inode(file->inode, file);
}
init_inode(ifile.inode, &ifile);
init_inode(cpfile.inode, &cpfile);
init_inode(sufile.inode, &sufile);
init_inode(datfile.inode, &datfile);
}
static int
create_fs(void)
{
uint64_t start_block;
uint32_t segsum_size;
char *data;
int i;
nuserfiles = nitems(user_files);
/* Count and assign blocks */
count_seg_blocks();
segsum_size = segment_size();
start_block = NANDFS_FIRST_BLOCK + SIZE_TO_BLOCK(segsum_size);
assign_file_blocks(start_block);
/* Create super root structure */
save_super_root();
/* Create root directory */
save_root_dir();
/* Fill in file contents */
save_sufile();
save_cpfile();
save_ifile();
save_datfile();
/* Save fsdata and superblocks */
create_fsdata();
create_super_block();
for (i = 0; i < NANDFS_NFSAREAS; i++) {
if (fsdata_blocks_state[i] != NANDFS_BLOCK_GOOD)
continue;
data = get_block((i * erasesize)/blocksize, 0);
save_fsdata(data);
data = get_block((i * erasesize + NANDFS_SBLOCK_OFFSET_BYTES) /
blocksize, 0);
if (blocksize > NANDFS_SBLOCK_OFFSET_BYTES)
data += NANDFS_SBLOCK_OFFSET_BYTES;
save_super_block(data);
memset(data + sizeof(struct nandfs_super_block), 0xff,
(blocksize - sizeof(struct nandfs_super_block) -
NANDFS_SBLOCK_OFFSET_BYTES));
}
/* Save segment summary and CRCs */
save_segsum(get_block(NANDFS_FIRST_BLOCK, 0));
return (0);
}
static void
write_fs(int fda)
{
struct nandfs_block *block;
char *data;
u_int ret;
/* Overwrite next block with ff if not nand device */
if (!is_nand) {
data = get_block(seg_endblock, 0);
memset(data, 0xff, blocksize);
}
LIST_FOREACH(block, &block_head, block_link) {
lseek(fda, block->number * blocksize, SEEK_SET);
ret = write(fda, block->data, blocksize);
if (ret != blocksize)
err(1, "cannot write filesystem data");
}
}
static void
check_parameters(void)
{
int i;
/* check blocksize */
if ((blocksize < NANDFS_MIN_BLOCKSIZE) || (blocksize > MAXBSIZE) ||
((blocksize - 1) & blocksize)) {
errx(1, "Bad blocksize (%zu). Must be in range [%u-%u] "
"and a power of two.", blocksize, NANDFS_MIN_BLOCKSIZE,
MAXBSIZE);
}
/* check blocks per segments */
if ((blocks_per_segment < NANDFS_SEG_MIN_BLOCKS) ||
((blocksize - 1) & blocksize))
errx(1, "Bad blocks per segment (%lu). Must be greater than "
"%u and a power of two.", blocks_per_segment,
NANDFS_SEG_MIN_BLOCKS);
/* check reserved segment percentage */
if ((rsv_segment_percent < 1) || (rsv_segment_percent > 99))
errx(1, "Bad reserved segment percentage. "
"Must in range 1..99.");
/* check volume label */
i = 0;
if (volumelabel) {
while (isalnum(volumelabel[++i]))
;
if (volumelabel[i] != '\0') {
errx(1, "bad volume label. "
"Valid characters are alphanumerics.");
}
if (strlen(volumelabel) >= 16)
errx(1, "Bad volume label. Length is longer than %d.",
16);
}
nandfs_time = time(NULL);
}
static void
print_parameters(void)
{
printf("filesystem parameters:\n");
printf("blocksize: %#zx sectorsize: %#zx\n", blocksize, sectorsize);
printf("erasesize: %#jx mediasize: %#jx\n", erasesize, mediasize);
printf("segment size: %#jx blocks per segment: %#x\n", segsize,
(uint32_t)blocks_per_segment);
}
/*
* Exit with error if file system is mounted.
*/
static void
check_mounted(const char *fname, mode_t mode)
{
struct statfs *mp;
const char *s1, *s2;
size_t len;
int n, r;
if (!(n = getmntinfo(&mp, MNT_NOWAIT)))
err(1, "getmntinfo");
len = strlen(_PATH_DEV);
s1 = fname;
if (!strncmp(s1, _PATH_DEV, len))
s1 += len;
r = S_ISCHR(mode) && s1 != fname && *s1 == 'r';
for (; n--; mp++) {
s2 = mp->f_mntfromname;
if (!strncmp(s2, _PATH_DEV, len))
s2 += len;
if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) ||
!strcmp(s1, s2))
errx(1, "%s is mounted on %s", fname, mp->f_mntonname);
}
}
static void
calculate_geometry(int fd)
{
struct chip_param_io chip_params;
char ident[DISK_IDENT_SIZE];
char medianame[MAXPATHLEN];
/* Check storage type */
g_get_ident(fd, ident, DISK_IDENT_SIZE);
g_get_name(ident, medianame, MAXPATHLEN);
debug("device name: %s", medianame);
is_nand = (strstr(medianame, "gnand") != NULL);
debug("is_nand = %d", is_nand);
sectorsize = g_sectorsize(fd);
debug("sectorsize: %#zx", sectorsize);
/* Get storage size */
mediasize = g_mediasize(fd);
debug("mediasize: %#jx", mediasize);
/* Get storage erase unit size */
if (!is_nand)
erasesize = NANDFS_DEF_ERASESIZE;
else if (ioctl(fd, NAND_IO_GET_CHIP_PARAM, &chip_params) != -1)
erasesize = chip_params.page_size * chip_params.pages_per_block;
else
errx(1, "Cannot ioctl(NAND_IO_GET_CHIP_PARAM)");
debug("erasesize: %#jx", (uintmax_t)erasesize);
if (blocks_per_segment == 0) {
if (erasesize >= NANDFS_MIN_SEGSIZE)
blocks_per_segment = erasesize / blocksize;
else
blocks_per_segment = NANDFS_MIN_SEGSIZE / blocksize;
}
/* Calculate number of segments */
segsize = blocksize * blocks_per_segment;
nsegments = ((mediasize - NANDFS_NFSAREAS * erasesize) / segsize) - 2;
debug("segsize: %#jx", segsize);
debug("nsegments: %#jx", nsegments);
}
static void
erase_device(int fd)
{
int rest, failed;
uint64_t i, nblocks;
off_t offset;
failed = 0;
for (i = 0; i < NANDFS_NFSAREAS; i++) {
debug("Deleting %jx\n", i * erasesize);
if (g_delete(fd, i * erasesize, erasesize)) {
printf("cannot delete %jx\n", i * erasesize);
fsdata_blocks_state[i] = NANDFS_BLOCK_BAD;
failed++;
} else
fsdata_blocks_state[i] = NANDFS_BLOCK_GOOD;
}
if (failed == NANDFS_NFSAREAS) {
printf("%d first blocks not usable. Unable to create "
"filesystem.\n", failed);
exit(1);
}
for (i = 0; i < nsegments; i++) {
offset = NANDFS_NFSAREAS * erasesize + i * segsize;
if (g_delete(fd, offset, segsize)) {
printf("cannot delete segment %jx (offset %jd)\n",
i, offset);
bad_segments_count++;
bad_segments = realloc(bad_segments,
bad_segments_count * sizeof(uint32_t));
bad_segments[bad_segments_count - 1] = i;
}
}
if (bad_segments_count == nsegments) {
printf("no valid segments\n");
exit(1);
}
/* Delete remaining blocks at the end of device */
rest = mediasize % segsize;
nblocks = rest / erasesize;
for (i = 0; i < nblocks; i++) {
offset = (segsize * nsegments) + (i * erasesize);
if (g_delete(fd, offset, erasesize)) {
printf("cannot delete space after last segment "
"- probably a bad block\n");
}
}
}
static void
erase_initial(int fd)
{
char buf[512];
u_int i;
memset(buf, 0xff, sizeof(buf));
lseek(fd, 0, SEEK_SET);
for (i = 0; i < NANDFS_NFSAREAS * erasesize; i += sizeof(buf))
write(fd, buf, sizeof(buf));
}
static void
create_nandfs(int fd)
{
create_fs();
write_fs(fd);
}
static void
print_summary(void)
{
printf("filesystem was created successfully\n");
printf("total segments: %#jx valid segments: %#jx\n", nsegments,
nsegments - bad_segments_count);
printf("total space: %ju MB free: %ju MB\n",
(nsegments *
blocks_per_segment * blocksize) / (1024 * 1024),
((nsegments - bad_segments_count) *
blocks_per_segment * blocksize) / (1024 * 1024));
}
int
main(int argc, char *argv[])
{
struct stat sb;
char buf[MAXPATHLEN];
const char opts[] = "b:B:L:m:";
const char *fname;
int ch, fd;
while ((ch = getopt(argc, argv, opts)) != -1) {
switch (ch) {
case 'b':
blocksize = strtol(optarg, (char **)NULL, 10);
if (blocksize == 0)
usage();
break;
case 'B':
blocks_per_segment = strtol(optarg, (char **)NULL, 10);
if (blocks_per_segment == 0)
usage();
break;
case 'L':
volumelabel = optarg;
break;
case 'm':
rsv_segment_percent = strtol(optarg, (char **)NULL, 10);
if (rsv_segment_percent == 0)
usage();
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc < 1 || argc > 2)
usage();
/* construct proper device path */
fname = *argv++;
if (!strchr(fname, '/')) {
snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname);
if (!(fname = strdup(buf)))
err(1, NULL);
}
fd = g_open(fname, 1);
if (fd == -1)
err(1, "Cannot open %s", fname);
if (fstat(fd, &sb) == -1)
err(1, "Cannot stat %s", fname);
if (!S_ISCHR(sb.st_mode))
warnx("%s is not a character device", fname);
check_mounted(fname, sb.st_mode);
calculate_geometry(fd);
check_parameters();
print_parameters();
if (is_nand)
erase_device(fd);
else
erase_initial(fd);
create_nandfs(fd);
print_summary();
g_close(fd);
return (0);
}
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