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freebsd-dev/sbin/newfs_nandfs/newfs_nandfs.c

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/*-
* 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 >= NDADDR) {
printf("nandfs: file too big (%jd > %d)\n", blk, 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)
{
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(&fsdata.f_uuid, 1);
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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