199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 2010-2012 Semihalf.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * All rights reserved.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Redistribution and use in source and binary forms, with or without
199767f8919635c4928607450d9e0abb932109ceToomas Soome * modification, are permitted provided that the following conditions
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 1. Redistributions of source code must retain the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer in the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * documentation and/or other materials provided with the distribution.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
199767f8919635c4928607450d9e0abb932109ceToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
199767f8919635c4928607450d9e0abb932109ceToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
199767f8919635c4928607450d9e0abb932109ceToomas Soome * SUCH DAMAGE.
199767f8919635c4928607450d9e0abb932109ceToomas Soome printf("NANDFS_DEBUG:" fmt "\n", ##args); } while (0)
199767f8919635c4928607450d9e0abb932109ceToomas Soome uint32_t groups_per_desc_block; /* desc is super group */
199767f8919635c4928607450d9e0abb932109ceToomas Soome uint32_t blocks_per_desc_block; /* desc is super group */
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_open(const char *, struct open_file *);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_read(struct open_file *, void *, size_t, size_t *);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic off_t nandfs_seek(struct open_file *, off_t, int);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_stat(struct open_file *, struct stat *);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_readdir(struct open_file *, struct dirent *);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_buf_read(struct nandfs *, void **, size_t *);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic struct nandfs_node *nandfs_lookup_path(struct nandfs *, const char *);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_read_inode(struct nandfs *, struct nandfs_node *,
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_read_blk(struct nandfs *, nandfs_daddr_t, void *, int);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_bmap_lookup(struct nandfs *, struct nandfs_node *,
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_get_checkpoint(struct nandfs *, uint64_t,
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic nandfs_daddr_t nandfs_vtop(struct nandfs *, nandfs_daddr_t);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic void nandfs_calc_mdt_consts(int, struct nandfs_mdt *, int);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic void nandfs_mdt_trans(struct nandfs_mdt *, uint64_t,
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int ioread(struct open_file *, off_t, void *, u_int);
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int nandfs_probe_sectorsize(struct open_file *);
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define NINDIR(fs) ((fs)->nf_blocksize / sizeof(nandfs_daddr_t))
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* from NetBSD's src/sys/net/if_ethersubr.c */
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_crc32(uint32_t crc, const uint8_t *buf, size_t len)
199767f8919635c4928607450d9e0abb932109ceToomas Soome 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
199767f8919635c4928607450d9e0abb932109ceToomas Soome 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
199767f8919635c4928607450d9e0abb932109ceToomas Soome 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
199767f8919635c4928607450d9e0abb932109ceToomas Soome for (i = 0; i < len; i++) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (crc ^ ~0U);
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_check_fsdata_crc(struct nandfs_fsdata *fsdata)
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Preserve crc */
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Calculate */
199767f8919635c4928607450d9e0abb932109ceToomas Soome comp_crc = nandfs_crc32(0, (uint8_t *)fsdata, fsdata->f_bytes);
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Restore */
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Check CRC */
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_check_superblock_crc(struct nandfs_fsdata *fsdata,
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Check super block magic */
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Preserve CRC */
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Calculate */
199767f8919635c4928607450d9e0abb932109ceToomas Soome comp_crc = nandfs_crc32(0, (uint8_t *)super, fsdata->f_sbbytes);
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Restore */
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Check CRC */
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_find_super_block(struct nandfs *fs, struct open_file *f)
199767f8919635c4928607450d9e0abb932109ceToomas Soome int i, j, n, s;
199767f8919635c4928607450d9e0abb932109ceToomas Soome sectors_to_read = (NANDFS_NFSAREAS * fs->nf_fsdata->f_erasesize) /
199767f8919635c4928607450d9e0abb932109ceToomas Soome for (i = 0; i < sectors_to_read; i++) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome error = ioread(f, i * fs->nf_sectorsize, (char *)sb,
199767f8919635c4928607450d9e0abb932109ceToomas Soome n = fs->nf_sectorsize / sizeof(struct nandfs_super_block);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if ((i * fs->nf_sectorsize) % fs->nf_fsdata->f_erasesize == 0) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (fs->nf_sectorsize == sizeof(struct nandfs_fsdata))
199767f8919635c4928607450d9e0abb932109ceToomas Soome s += (sizeof(struct nandfs_fsdata) /
199767f8919635c4928607450d9e0abb932109ceToomas Soome sizeof(struct nandfs_super_block));
199767f8919635c4928607450d9e0abb932109ceToomas Soome for (j = s; j < n; j++) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (!nandfs_check_superblock_crc(fs->nf_fsdata, &sb[j]))
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("magic %x wtime %jd, lastcp 0x%jx\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soome sb[j].s_magic, sb[j].s_wtime, sb[j].s_last_cno);
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_find_fsdata(struct nandfs *fs, struct open_file *f)
199767f8919635c4928607450d9e0abb932109ceToomas Soome error = ioread(f, offset, (char *)fs->nf_fsdata,
199767f8919635c4928607450d9e0abb932109ceToomas Soome sizeof(struct nandfs_fsdata));
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (fs->nf_fsdata->f_magic == NANDFS_FSDATA_MAGIC) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("found at %x, volume %s\n", offset,
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_read_structures(struct nandfs *fs, struct open_file *f)
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("selected sb with w_time %jd last_pseg %jx\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_mount(struct nandfs *fs, struct open_file *f)
199767f8919635c4928607450d9e0abb932109ceToomas Soome fs->nf_fsdata = malloc(sizeof(struct nandfs_fsdata));
199767f8919635c4928607450d9e0abb932109ceToomas Soome fs->nf_sb = malloc(sizeof(struct nandfs_super_block));
199767f8919635c4928607450d9e0abb932109ceToomas Soome fs->nf_blocksize = 1 << (fs->nf_fsdata->f_log_block_size + 10);
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("using superblock with wtime %jd\n", fs->nf_sb->s_wtime);
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Calculate indirect block levels.
199767f8919635c4928607450d9e0abb932109ceToomas Soome nandfs_calc_mdt_consts(fs->nf_blocksize, &fs->nf_datfile_mdt,
199767f8919635c4928607450d9e0abb932109ceToomas Soome nandfs_calc_mdt_consts(fs->nf_blocksize, &fs->nf_ifile_mdt,
199767f8919635c4928607450d9e0abb932109ceToomas Soome err = ioread(f, last_pseg * fs->nf_blocksize, &fs->nf_segsum,
199767f8919635c4928607450d9e0abb932109ceToomas Soome err = ioread(f, (last_pseg + fs->nf_segsum.ss_nblocks - 1) *
199767f8919635c4928607450d9e0abb932109ceToomas Soome fs->nf_blocksize, &fs->nf_sroot, sizeof(struct nandfs_super_root));
199767f8919635c4928607450d9e0abb932109ceToomas Soome err = nandfs_get_checkpoint(fs, fs->nf_cpno, &fs->nf_checkpoint);
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("checkpoint cp_cno=%lld\n", fs->nf_checkpoint.cp_cno);
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("checkpoint cp_inodes_count=%lld\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("checkpoint cp_ifile_inode.i_blocks=%lld\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soome fs->nf_ifile.inode = &fs->nf_checkpoint.cp_ifile_inode;
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define NINDIR(fs) ((fs)->nf_blocksize / sizeof(nandfs_daddr_t))
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_open(const char *path, struct open_file *f)
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_open('%s', %p)\n", path, f);
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Calculate indirect block levels.
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("fs %p nf_sectorsize=%x\n", fs, fs->nf_sectorsize);
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("Cannot mount nandfs: %s\n", strerror(err));
199767f8919635c4928607450d9e0abb932109ceToomas Soome LIST_FOREACH_SAFE(bmap, &node->bmap_bufs, list, tmp) {
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_read(struct open_file *f, void *addr, size_t size, size_t *resid)
199767f8919635c4928607450d9e0abb932109ceToomas Soome struct nandfs *fs = (struct nandfs *)f->f_fsdata;
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_read(file=%p, addr=%p, size=%d)\n", f, addr, size);
199767f8919635c4928607450d9e0abb932109ceToomas Soome while (size != 0) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (fs->nf_offset >= fs->nf_opened_node->inode->i_size)
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_seek(struct open_file *f, off_t offset, int where)
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_seek(file=%p, offset=%lld, where=%d)\n", f,
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (-1);
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_stat(struct open_file *f, struct stat *sb)
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_stat(file=%p, stat=%p)\n", f, sb);
199767f8919635c4928607450d9e0abb932109ceToomas Soome sb->st_size = fs->nf_opened_node->inode->i_size;
199767f8919635c4928607450d9e0abb932109ceToomas Soome sb->st_mode = fs->nf_opened_node->inode->i_mode;
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_readdir(struct open_file *f, struct dirent *d)
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_readdir(file=%p, dirent=%p)\n", f, d);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (fs->nf_offset >= fs->nf_opened_node->inode->i_size) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_readdir(file=%p, dirent=%p) ENOENT\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_readdir(file=%p, dirent=%p)"
199767f8919635c4928607450d9e0abb932109ceToomas Soome "buf_read failed\n", f, d);
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_readdir(file=%p, dirent=%p) moving forward\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soome strncpy(d->d_name, dirent->name, dirent->name_len);
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_buf_read(struct nandfs *fs, void **buf_p, size_t *size_p)
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (nandfs_read_inode(fs, fs->nf_opened_node, blknr, 1,
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_buf_read buf_p=%p size_p=%d\n", *buf_p, *size_p);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (*size_p > fs->nf_opened_node->inode->i_size - fs->nf_offset)
199767f8919635c4928607450d9e0abb932109ceToomas Soome *size_p = fs->nf_opened_node->inode->i_size - fs->nf_offset;
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic struct nandfs_node *
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_lookup_node(struct nandfs *fs, uint64_t ino)
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_lookup_node ino=%lld\n", ino);
199767f8919635c4928607450d9e0abb932109ceToomas Soome printf("nandfs_lookup_node: invalid inode requested\n");
199767f8919635c4928607450d9e0abb932109ceToomas Soome nandfs_mdt_trans(&fs->nf_ifile_mdt, ino, &blocknr, &entrynr);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (nandfs_read_inode(fs, &fs->nf_ifile, blocknr, 1, buffer, 0))
199767f8919635c4928607450d9e0abb932109ceToomas Soome memcpy(inode, &buffer[entrynr], sizeof(struct nandfs_inode));
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic struct nandfs_node *
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_lookup_path(struct nandfs *fs, const char *path)
199767f8919635c4928607450d9e0abb932109ceToomas Soome int nlinks = 0, counter, len, link_len, nameidx;
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Get the root inode */
199767f8919635c4928607450d9e0abb932109ceToomas Soome node = nandfs_lookup_node(fs, NANDFS_ROOT_INO);
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("%s: looking for %s\n", __func__, strp);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (nandfs_read_inode(fs, node, i, 1, orig, 0)) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("%s: %.*s has mode %o\n", __func__,
199767f8919635c4928607450d9e0abb932109ceToomas Soome dirent->name_len, dirent->name, node->inode->i_mode);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (nandfs_read_inode(fs, node, 0, 1, orig, 0)) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("%s: strp=%s, lpath=%s, namebuf0=%s, "
199767f8919635c4928607450d9e0abb932109ceToomas Soome "namebuf1=%s, idx=%d\n", __func__, strp, lpath,
199767f8919635c4928607450d9e0abb932109ceToomas Soome namebuf + 0, namebuf + MAXPATHLEN + 1, nameidx);
199767f8919635c4928607450d9e0abb932109ceToomas Soome * If absolute pathname, restart at root. Otherwise
199767f8919635c4928607450d9e0abb932109ceToomas Soome * continue with out parent inode.
199767f8919635c4928607450d9e0abb932109ceToomas Soome inode = (orig[0] == '/') ? NANDFS_ROOT_INO : pinode;
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_read_inode(struct nandfs *fs, struct nandfs_node *node,
199767f8919635c4928607450d9e0abb932109ceToomas Soome nandfs_daddr_t blknr, u_int nblks, void *buf, int raw)
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_read_inode fs=%p node=%p blknr=%lld nblks=%d\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soome for (i = 0; i < nblks; i++) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome error = nandfs_bmap_lookup(fs, node, blknr + i, &vblks[i], raw);
199767f8919635c4928607450d9e0abb932109ceToomas Soome for (i = 0; i < nblks; i++) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (ioread(fs->nf_file, pblks[i] * fs->nf_blocksize, buf,
199767f8919635c4928607450d9e0abb932109ceToomas Soome buf = (void *)((uintptr_t)buf + fs->nf_blocksize);
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_read_blk(struct nandfs *fs, nandfs_daddr_t blknr, void *buf, int phys)
199767f8919635c4928607450d9e0abb932109ceToomas Soome pblknr = (phys ? blknr : nandfs_vtop(fs, blknr));
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (ioread(fs->nf_file, pblknr * fs->nf_blocksize, buf,
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_get_checkpoint(struct nandfs *fs, uint64_t cpno,
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_get_checkpoint(fs=%p cpno=%lld)\n", fs, cpno);
199767f8919635c4928607450d9e0abb932109ceToomas Soome cpno += NANDFS_CPFILE_FIRST_CHECKPOINT_OFFSET - 1;
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (nandfs_read_inode(fs, &fs->nf_cpfile, blocknr, 1, buf, 0)) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome memcpy(cp, buf + blockoff, sizeof(struct nandfs_checkpoint));
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_get_map(struct nandfs *fs, struct nandfs_node *node, nandfs_daddr_t blknr,
199767f8919635c4928607450d9e0abb932109ceToomas Soome LIST_INSERT_HEAD(&node->bmap_bufs, bmap, list);
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("%s:(node=%p, map=%p)\n", __func__, node, map);
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_bmap_lookup(struct nandfs *fs, struct nandfs_node *node,
199767f8919635c4928607450d9e0abb932109ceToomas Soome nandfs_lbn_t lblknr, nandfs_daddr_t *vblknr, int phys)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * nindir[0] = NINDIR
199767f8919635c4928607450d9e0abb932109ceToomas Soome * nindir[1] = NINDIR**2
199767f8919635c4928607450d9e0abb932109ceToomas Soome * nindir[2] = NINDIR**3
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("lblknr=%jx fs->nf_nindir[%d]=%d\n", lblknr, level, fs->nf_nindir[level]);
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Block number too high */
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("calling get_map with %jx\n", ind_block_num);
199767f8919635c4928607450d9e0abb932109ceToomas Soome map = nandfs_get_map(fs, node, ind_block_num, phys);
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_vtop(struct nandfs *fs, nandfs_daddr_t vblocknr)
199767f8919635c4928607450d9e0abb932109ceToomas Soome nandfs_mdt_trans(&fs->nf_datfile_mdt, vblocknr, &blocknr, &entrynr);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (nandfs_read_inode(fs, &fs->nf_datfile, blocknr, 1, dat, 1)) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("nandfs_vtop entrynr=%d vblocknr=%lld pblocknr=%lld\n",
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_calc_mdt_consts(int blocksize, struct nandfs_mdt *mdt, int entry_size)
199767f8919635c4928607450d9e0abb932109ceToomas Soome mdt->entries_per_group = blocksize * 8; /* bits in sector */
199767f8919635c4928607450d9e0abb932109ceToomas Soome mdt->entries_per_block = blocksize / entry_size;
199767f8919635c4928607450d9e0abb932109ceToomas Soome (mdt->entries_per_group -1) / mdt->entries_per_block + 1 + 1;
199767f8919635c4928607450d9e0abb932109ceToomas Soome blocksize / sizeof(struct nandfs_block_group_desc);
199767f8919635c4928607450d9e0abb932109ceToomas Soome mdt->groups_per_desc_block * mdt->blocks_per_group + 1;
199767f8919635c4928607450d9e0abb932109ceToomas Soomenandfs_mdt_trans(struct nandfs_mdt *mdt, uint64_t index,
199767f8919635c4928607450d9e0abb932109ceToomas Soome nandfs_daddr_t *blocknr, uint32_t *entry_in_block)
199767f8919635c4928607450d9e0abb932109ceToomas Soome uint64_t group, group_offset, blocknr_in_group;
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Calculate our offset in the file */
199767f8919635c4928607450d9e0abb932109ceToomas Soome desc_block = group / mdt->groups_per_desc_block;
199767f8919635c4928607450d9e0abb932109ceToomas Soome desc_offset = group % mdt->groups_per_desc_block;
199767f8919635c4928607450d9e0abb932109ceToomas Soome blocknr_in_group = group_offset / mdt->entries_per_block;
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* To descgroup offset */
199767f8919635c4928607450d9e0abb932109ceToomas Soome blknr = 1 + desc_block * mdt->blocks_per_desc_block;
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* To group offset */
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* To actual file block */
199767f8919635c4928607450d9e0abb932109ceToomas Soome *entry_in_block = group_offset % mdt->entries_per_block;
199767f8919635c4928607450d9e0abb932109ceToomas Soomeioread(struct open_file *f, off_t pos, void *buf, u_int length)
199767f8919635c4928607450d9e0abb932109ceToomas Soome int bsize = ((struct nandfs *)f->f_fsdata)->nf_sectorsize;
199767f8919635c4928607450d9e0abb932109ceToomas Soome NANDFS_DEBUG("pos=%lld length=%d off=%d nsec=%d\n", pos, length,
199767f8919635c4928607450d9e0abb932109ceToomas Soome err = (f->f_dev->dv_strategy)(f->f_devdata, F_READ, pos,
199767f8919635c4928607450d9e0abb932109ceToomas Soome memcpy(buf, (void *)((uintptr_t)buffer + off), length);
199767f8919635c4928607450d9e0abb932109ceToomas Soome err = (f->f_dev->dv_strategy)(f->f_devdata, F_READ, 0, i,
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (-1);