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-rw-r--r--stand/libsa/nandfs.c1061
1 files changed, 0 insertions, 1061 deletions
diff --git a/stand/libsa/nandfs.c b/stand/libsa/nandfs.c
deleted file mode 100644
index b3e72243e995..000000000000
--- a/stand/libsa/nandfs.c
+++ /dev/null
@@ -1,1061 +0,0 @@
-/*-
- * 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/queue.h>
-#include <sys/stdint.h>
-#include <ufs/ufs/dinode.h>
-#include <fs/nandfs/nandfs_fs.h>
-#include "stand.h"
-#include "string.h"
-#include "zlib.h"
-
-#define DEBUG
-#undef DEBUG
-#ifdef DEBUG
-#define NANDFS_DEBUG(fmt, args...) do { \
- printf("NANDFS_DEBUG:" fmt "\n", ##args); } while (0)
-#else
-#define NANDFS_DEBUG(fmt, args...)
-#endif
-
-struct nandfs_mdt {
- uint32_t entries_per_block;
- uint32_t entries_per_group;
- uint32_t blocks_per_group;
- uint32_t groups_per_desc_block; /* desc is super group */
- uint32_t blocks_per_desc_block; /* desc is super group */
-};
-
-struct bmap_buf {
- LIST_ENTRY(bmap_buf) list;
- nandfs_daddr_t blknr;
- uint64_t *map;
-};
-
-struct nandfs_node {
- struct nandfs_inode *inode;
- LIST_HEAD(, bmap_buf) bmap_bufs;
-};
-struct nandfs {
- int nf_blocksize;
- int nf_sectorsize;
- int nf_cpno;
-
- struct open_file *nf_file;
- struct nandfs_node *nf_opened_node;
- u_int nf_offset;
- uint8_t *nf_buf;
- int64_t nf_buf_blknr;
-
- struct nandfs_fsdata *nf_fsdata;
- struct nandfs_super_block *nf_sb;
- struct nandfs_segment_summary nf_segsum;
- struct nandfs_checkpoint nf_checkpoint;
- struct nandfs_super_root nf_sroot;
- struct nandfs_node nf_ifile;
- struct nandfs_node nf_datfile;
- struct nandfs_node nf_cpfile;
- struct nandfs_mdt nf_datfile_mdt;
- struct nandfs_mdt nf_ifile_mdt;
-
- int nf_nindir[NANDFS_NIADDR];
-};
-
-static int nandfs_open(const char *, struct open_file *);
-static int nandfs_close(struct open_file *);
-static int nandfs_read(struct open_file *, void *, size_t, size_t *);
-static off_t nandfs_seek(struct open_file *, off_t, int);
-static int nandfs_stat(struct open_file *, struct stat *);
-static int nandfs_readdir(struct open_file *, struct dirent *);
-
-static int nandfs_buf_read(struct nandfs *, void **, size_t *);
-static struct nandfs_node *nandfs_lookup_path(struct nandfs *, const char *);
-static int nandfs_read_inode(struct nandfs *, struct nandfs_node *,
- nandfs_lbn_t, u_int, void *, int);
-static int nandfs_read_blk(struct nandfs *, nandfs_daddr_t, void *, int);
-static int nandfs_bmap_lookup(struct nandfs *, struct nandfs_node *,
- nandfs_lbn_t, nandfs_daddr_t *, int);
-static int nandfs_get_checkpoint(struct nandfs *, uint64_t,
- struct nandfs_checkpoint *);
-static nandfs_daddr_t nandfs_vtop(struct nandfs *, nandfs_daddr_t);
-static void nandfs_calc_mdt_consts(int, struct nandfs_mdt *, int);
-static void nandfs_mdt_trans(struct nandfs_mdt *, uint64_t,
- nandfs_daddr_t *, uint32_t *);
-static int ioread(struct open_file *, off_t, void *, u_int);
-static int nandfs_probe_sectorsize(struct open_file *);
-
-struct fs_ops nandfs_fsops = {
- "nandfs",
- nandfs_open,
- nandfs_close,
- nandfs_read,
- null_write,
- nandfs_seek,
- nandfs_stat,
- nandfs_readdir
-};
-
-#define NINDIR(fs) ((fs)->nf_blocksize / sizeof(nandfs_daddr_t))
-
-/* from NetBSD's src/sys/net/if_ethersubr.c */
-static uint32_t
-nandfs_crc32(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 int
-nandfs_check_fsdata_crc(struct nandfs_fsdata *fsdata)
-{
- uint32_t fsdata_crc, comp_crc;
-
- if (fsdata->f_magic != NANDFS_FSDATA_MAGIC)
- return (0);
-
- /* Preserve crc */
- fsdata_crc = fsdata->f_sum;
-
- /* Calculate */
- fsdata->f_sum = (0);
- comp_crc = nandfs_crc32(0, (uint8_t *)fsdata, fsdata->f_bytes);
-
- /* Restore */
- fsdata->f_sum = fsdata_crc;
-
- /* Check CRC */
- return (fsdata_crc == comp_crc);
-}
-
-static int
-nandfs_check_superblock_crc(struct nandfs_fsdata *fsdata,
- struct nandfs_super_block *super)
-{
- uint32_t super_crc, comp_crc;
-
- /* Check super block magic */
- if (super->s_magic != NANDFS_SUPER_MAGIC)
- return (0);
-
- /* Preserve CRC */
- super_crc = super->s_sum;
-
- /* Calculate */
- super->s_sum = (0);
- comp_crc = nandfs_crc32(0, (uint8_t *)super, fsdata->f_sbbytes);
-
- /* Restore */
- super->s_sum = super_crc;
-
- /* Check CRC */
- return (super_crc == comp_crc);
-}
-
-static int
-nandfs_find_super_block(struct nandfs *fs, struct open_file *f)
-{
- struct nandfs_super_block *sb;
- int i, j, n, s;
- int sectors_to_read, error;
-
- sb = malloc(fs->nf_sectorsize);
- if (sb == NULL)
- return (ENOMEM);
-
- memset(fs->nf_sb, 0, sizeof(*fs->nf_sb));
-
- sectors_to_read = (NANDFS_NFSAREAS * fs->nf_fsdata->f_erasesize) /
- fs->nf_sectorsize;
- for (i = 0; i < sectors_to_read; i++) {
- NANDFS_DEBUG("reading i %d offset %d\n", i,
- i * fs->nf_sectorsize);
- error = ioread(f, i * fs->nf_sectorsize, (char *)sb,
- fs->nf_sectorsize);
- if (error) {
- NANDFS_DEBUG("error %d\n", error);
- continue;
- }
- n = fs->nf_sectorsize / sizeof(struct nandfs_super_block);
- s = 0;
- if ((i * fs->nf_sectorsize) % fs->nf_fsdata->f_erasesize == 0) {
- if (fs->nf_sectorsize == sizeof(struct nandfs_fsdata))
- continue;
- else {
- s += (sizeof(struct nandfs_fsdata) /
- sizeof(struct nandfs_super_block));
- }
- }
-
- for (j = s; j < n; j++) {
- if (!nandfs_check_superblock_crc(fs->nf_fsdata, &sb[j]))
- continue;
- NANDFS_DEBUG("magic %x wtime %jd, lastcp 0x%jx\n",
- sb[j].s_magic, sb[j].s_wtime, sb[j].s_last_cno);
- if (sb[j].s_last_cno > fs->nf_sb->s_last_cno)
- memcpy(fs->nf_sb, &sb[j], sizeof(*fs->nf_sb));
- }
- }
-
- free(sb);
-
- return (fs->nf_sb->s_magic != 0 ? 0 : EINVAL);
-}
-
-static int
-nandfs_find_fsdata(struct nandfs *fs, struct open_file *f)
-{
- int offset, error, i;
-
- NANDFS_DEBUG("starting\n");
-
- offset = 0;
- for (i = 0; i < 64 * NANDFS_NFSAREAS; i++) {
- error = ioread(f, offset, (char *)fs->nf_fsdata,
- sizeof(struct nandfs_fsdata));
- if (error)
- return (error);
- if (fs->nf_fsdata->f_magic == NANDFS_FSDATA_MAGIC) {
- NANDFS_DEBUG("found at %x, volume %s\n", offset,
- fs->nf_fsdata->f_volume_name);
- if (nandfs_check_fsdata_crc(fs->nf_fsdata))
- break;
- }
- offset += fs->nf_sectorsize;
- }
-
- return (error);
-}
-
-static int
-nandfs_read_structures(struct nandfs *fs, struct open_file *f)
-{
- int error;
-
- error = nandfs_find_fsdata(fs, f);
- if (error)
- return (error);
-
- error = nandfs_find_super_block(fs, f);
-
- if (error == 0)
- NANDFS_DEBUG("selected sb with w_time %jd last_pseg %jx\n",
- fs->nf_sb->s_wtime, fs->nf_sb->s_last_pseg);
-
- return (error);
-}
-
-static int
-nandfs_mount(struct nandfs *fs, struct open_file *f)
-{
- int err = 0, level;
- uint64_t last_pseg;
-
- fs->nf_fsdata = malloc(sizeof(struct nandfs_fsdata));
- fs->nf_sb = malloc(sizeof(struct nandfs_super_block));
-
- err = nandfs_read_structures(fs, f);
- if (err) {
- free(fs->nf_fsdata);
- free(fs->nf_sb);
- return (err);
- }
-
- fs->nf_blocksize = 1 << (fs->nf_fsdata->f_log_block_size + 10);
-
- NANDFS_DEBUG("using superblock with wtime %jd\n", fs->nf_sb->s_wtime);
-
- fs->nf_cpno = fs->nf_sb->s_last_cno;
- last_pseg = fs->nf_sb->s_last_pseg;
-
- /*
- * Calculate indirect block levels.
- */
- nandfs_daddr_t mult;
-
- mult = 1;
- for (level = 0; level < NANDFS_NIADDR; level++) {
- mult *= NINDIR(fs);
- fs->nf_nindir[level] = mult;
- }
-
- nandfs_calc_mdt_consts(fs->nf_blocksize, &fs->nf_datfile_mdt,
- fs->nf_fsdata->f_dat_entry_size);
-
- nandfs_calc_mdt_consts(fs->nf_blocksize, &fs->nf_ifile_mdt,
- fs->nf_fsdata->f_inode_size);
-
- err = ioread(f, last_pseg * fs->nf_blocksize, &fs->nf_segsum,
- sizeof(struct nandfs_segment_summary));
- if (err) {
- free(fs->nf_sb);
- free(fs->nf_fsdata);
- return (err);
- }
-
- err = ioread(f, (last_pseg + fs->nf_segsum.ss_nblocks - 1) *
- fs->nf_blocksize, &fs->nf_sroot, sizeof(struct nandfs_super_root));
- if (err) {
- free(fs->nf_sb);
- free(fs->nf_fsdata);
- return (err);
- }
-
- fs->nf_datfile.inode = &fs->nf_sroot.sr_dat;
- LIST_INIT(&fs->nf_datfile.bmap_bufs);
- fs->nf_cpfile.inode = &fs->nf_sroot.sr_cpfile;
- LIST_INIT(&fs->nf_cpfile.bmap_bufs);
-
- err = nandfs_get_checkpoint(fs, fs->nf_cpno, &fs->nf_checkpoint);
- if (err) {
- free(fs->nf_sb);
- free(fs->nf_fsdata);
- return (err);
- }
-
- NANDFS_DEBUG("checkpoint cp_cno=%lld\n", fs->nf_checkpoint.cp_cno);
- NANDFS_DEBUG("checkpoint cp_inodes_count=%lld\n",
- fs->nf_checkpoint.cp_inodes_count);
- NANDFS_DEBUG("checkpoint cp_ifile_inode.i_blocks=%lld\n",
- fs->nf_checkpoint.cp_ifile_inode.i_blocks);
-
- fs->nf_ifile.inode = &fs->nf_checkpoint.cp_ifile_inode;
- LIST_INIT(&fs->nf_ifile.bmap_bufs);
- return (0);
-}
-
-#define NINDIR(fs) ((fs)->nf_blocksize / sizeof(nandfs_daddr_t))
-
-static int
-nandfs_open(const char *path, struct open_file *f)
-{
- struct nandfs *fs;
- struct nandfs_node *node;
- int err, bsize, level;
-
- NANDFS_DEBUG("nandfs_open('%s', %p)\n", path, f);
-
- fs = malloc(sizeof(struct nandfs));
- f->f_fsdata = fs;
- fs->nf_file = f;
-
- bsize = nandfs_probe_sectorsize(f);
- if (bsize < 0) {
- printf("Cannot probe medium sector size\n");
- return (EINVAL);
- }
-
- fs->nf_sectorsize = bsize;
-
- /*
- * Calculate indirect block levels.
- */
- nandfs_daddr_t mult;
-
- mult = 1;
- for (level = 0; level < NANDFS_NIADDR; level++) {
- mult *= NINDIR(fs);
- fs->nf_nindir[level] = mult;
- }
-
- NANDFS_DEBUG("fs %p nf_sectorsize=%x\n", fs, fs->nf_sectorsize);
-
- err = nandfs_mount(fs, f);
- if (err) {
- NANDFS_DEBUG("Cannot mount nandfs: %s\n", strerror(err));
- return (err);
- }
-
- node = nandfs_lookup_path(fs, path);
- if (node == NULL)
- return (EINVAL);
-
- fs->nf_offset = 0;
- fs->nf_buf = NULL;
- fs->nf_buf_blknr = -1;
- fs->nf_opened_node = node;
- LIST_INIT(&fs->nf_opened_node->bmap_bufs);
- return (0);
-}
-
-static void
-nandfs_free_node(struct nandfs_node *node)
-{
- struct bmap_buf *bmap, *tmp;
-
- free(node->inode);
- LIST_FOREACH_SAFE(bmap, &node->bmap_bufs, list, tmp) {
- LIST_REMOVE(bmap, list);
- free(bmap->map);
- free(bmap);
- }
- free(node);
-}
-
-static int
-nandfs_close(struct open_file *f)
-{
- struct nandfs *fs = f->f_fsdata;
-
- NANDFS_DEBUG("nandfs_close(%p)\n", f);
-
- if (fs->nf_buf != NULL)
- free(fs->nf_buf);
-
- nandfs_free_node(fs->nf_opened_node);
- free(fs->nf_sb);
- free(fs);
- return (0);
-}
-
-static int
-nandfs_read(struct open_file *f, void *addr, size_t size, size_t *resid)
-{
- struct nandfs *fs = (struct nandfs *)f->f_fsdata;
- size_t csize, buf_size;
- void *buf;
- int error = 0;
-
- NANDFS_DEBUG("nandfs_read(file=%p, addr=%p, size=%d)\n", f, addr, size);
-
- while (size != 0) {
- if (fs->nf_offset >= fs->nf_opened_node->inode->i_size)
- break;
-
- error = nandfs_buf_read(fs, &buf, &buf_size);
- if (error)
- break;
-
- csize = size;
- if (csize > buf_size)
- csize = buf_size;
-
- bcopy(buf, addr, csize);
-
- fs->nf_offset += csize;
- addr = (char *)addr + csize;
- size -= csize;
- }
-
- if (resid)
- *resid = size;
- return (error);
-}
-
-static off_t
-nandfs_seek(struct open_file *f, off_t offset, int where)
-{
- struct nandfs *fs = f->f_fsdata;
- off_t off;
- u_int size;
-
- NANDFS_DEBUG("nandfs_seek(file=%p, offset=%lld, where=%d)\n", f,
- offset, where);
-
- size = fs->nf_opened_node->inode->i_size;
-
- switch (where) {
- case SEEK_SET:
- off = 0;
- break;
- case SEEK_CUR:
- off = fs->nf_offset;
- break;
- case SEEK_END:
- off = size;
- break;
- default:
- errno = EINVAL;
- return (-1);
- }
-
- off += offset;
- if (off < 0 || off > size) {
- errno = EINVAL;
- return(-1);
- }
-
- fs->nf_offset = (u_int)off;
-
- return (off);
-}
-
-static int
-nandfs_stat(struct open_file *f, struct stat *sb)
-{
- struct nandfs *fs = f->f_fsdata;
-
- NANDFS_DEBUG("nandfs_stat(file=%p, stat=%p)\n", f, sb);
-
- sb->st_size = fs->nf_opened_node->inode->i_size;
- sb->st_mode = fs->nf_opened_node->inode->i_mode;
- sb->st_uid = fs->nf_opened_node->inode->i_uid;
- sb->st_gid = fs->nf_opened_node->inode->i_gid;
- return (0);
-}
-
-static int
-nandfs_readdir(struct open_file *f, struct dirent *d)
-{
- struct nandfs *fs = f->f_fsdata;
- struct nandfs_dir_entry *dirent;
- void *buf;
- size_t buf_size;
-
- NANDFS_DEBUG("nandfs_readdir(file=%p, dirent=%p)\n", f, d);
-
- if (fs->nf_offset >= fs->nf_opened_node->inode->i_size) {
- NANDFS_DEBUG("nandfs_readdir(file=%p, dirent=%p) ENOENT\n",
- f, d);
- return (ENOENT);
- }
-
- if (nandfs_buf_read(fs, &buf, &buf_size)) {
- NANDFS_DEBUG("nandfs_readdir(file=%p, dirent=%p)"
- "buf_read failed\n", f, d);
- return (EIO);
- }
-
- NANDFS_DEBUG("nandfs_readdir(file=%p, dirent=%p) moving forward\n",
- f, d);
-
- dirent = (struct nandfs_dir_entry *)buf;
- fs->nf_offset += dirent->rec_len;
- strncpy(d->d_name, dirent->name, dirent->name_len);
- d->d_name[dirent->name_len] = '\0';
- d->d_type = dirent->file_type;
- return (0);
-}
-
-static int
-nandfs_buf_read(struct nandfs *fs, void **buf_p, size_t *size_p)
-{
- nandfs_daddr_t blknr, blkoff;
-
- blknr = fs->nf_offset / fs->nf_blocksize;
- blkoff = fs->nf_offset % fs->nf_blocksize;
-
- if (blknr != fs->nf_buf_blknr) {
- if (fs->nf_buf == NULL)
- fs->nf_buf = malloc(fs->nf_blocksize);
-
- if (nandfs_read_inode(fs, fs->nf_opened_node, blknr, 1,
- fs->nf_buf, 0))
- return (EIO);
-
- fs->nf_buf_blknr = blknr;
- }
-
- *buf_p = fs->nf_buf + blkoff;
- *size_p = fs->nf_blocksize - blkoff;
-
- NANDFS_DEBUG("nandfs_buf_read buf_p=%p size_p=%d\n", *buf_p, *size_p);
-
- if (*size_p > fs->nf_opened_node->inode->i_size - fs->nf_offset)
- *size_p = fs->nf_opened_node->inode->i_size - fs->nf_offset;
-
- return (0);
-}
-
-static struct nandfs_node *
-nandfs_lookup_node(struct nandfs *fs, uint64_t ino)
-{
- uint64_t blocknr;
- int entrynr;
- struct nandfs_inode *buffer;
- struct nandfs_node *node;
- struct nandfs_inode *inode;
-
- NANDFS_DEBUG("nandfs_lookup_node ino=%lld\n", ino);
-
- if (ino == 0) {
- printf("nandfs_lookup_node: invalid inode requested\n");
- return (NULL);
- }
-
- buffer = malloc(fs->nf_blocksize);
- inode = malloc(sizeof(struct nandfs_inode));
- node = malloc(sizeof(struct nandfs_node));
-
- nandfs_mdt_trans(&fs->nf_ifile_mdt, ino, &blocknr, &entrynr);
-
- if (nandfs_read_inode(fs, &fs->nf_ifile, blocknr, 1, buffer, 0))
- return (NULL);
-
- memcpy(inode, &buffer[entrynr], sizeof(struct nandfs_inode));
- node->inode = inode;
- free(buffer);
- return (node);
-}
-
-static struct nandfs_node *
-nandfs_lookup_path(struct nandfs *fs, const char *path)
-{
- struct nandfs_node *node;
- struct nandfs_dir_entry *dirent;
- char *namebuf;
- uint64_t i, done, pinode, inode;
- int nlinks = 0, counter, len, link_len, nameidx;
- uint8_t *buffer, *orig;
- char *strp, *lpath;
-
- buffer = malloc(fs->nf_blocksize);
- orig = buffer;
-
- namebuf = malloc(2 * MAXPATHLEN + 2);
- strncpy(namebuf, path, MAXPATHLEN);
- namebuf[MAXPATHLEN] = '\0';
- done = nameidx = 0;
- lpath = namebuf;
-
- /* Get the root inode */
- node = nandfs_lookup_node(fs, NANDFS_ROOT_INO);
- inode = NANDFS_ROOT_INO;
-
- while ((strp = strsep(&lpath, "/")) != NULL) {
- if (*strp == '\0')
- continue;
- if ((node->inode->i_mode & IFMT) != IFDIR) {
- nandfs_free_node(node);
- node = NULL;
- goto out;
- }
-
- len = strlen(strp);
- NANDFS_DEBUG("%s: looking for %s\n", __func__, strp);
- for (i = 0; i < node->inode->i_blocks; i++) {
- if (nandfs_read_inode(fs, node, i, 1, orig, 0)) {
- node = NULL;
- goto out;
- }
-
- buffer = orig;
- done = counter = 0;
- while (1) {
- dirent =
- (struct nandfs_dir_entry *)(void *)buffer;
- NANDFS_DEBUG("%s: dirent.name = %s\n",
- __func__, dirent->name);
- NANDFS_DEBUG("%s: dirent.rec_len = %d\n",
- __func__, dirent->rec_len);
- NANDFS_DEBUG("%s: dirent.inode = %lld\n",
- __func__, dirent->inode);
- if (len == dirent->name_len &&
- (strncmp(strp, dirent->name, len) == 0) &&
- dirent->inode != 0) {
- nandfs_free_node(node);
- node = nandfs_lookup_node(fs,
- dirent->inode);
- pinode = inode;
- inode = dirent->inode;
- done = 1;
- break;
- }
-
- counter += dirent->rec_len;
- buffer += dirent->rec_len;
-
- if (counter == fs->nf_blocksize)
- break;
- }
-
- if (done)
- break;
- }
-
- if (!done) {
- node = NULL;
- goto out;
- }
-
- NANDFS_DEBUG("%s: %.*s has mode %o\n", __func__,
- dirent->name_len, dirent->name, node->inode->i_mode);
-
- if ((node->inode->i_mode & IFMT) == IFLNK) {
- NANDFS_DEBUG("%s: %.*s is symlink\n",
- __func__, dirent->name_len, dirent->name);
- link_len = node->inode->i_size;
-
- if (++nlinks > MAXSYMLINKS) {
- nandfs_free_node(node);
- node = NULL;
- goto out;
- }
-
- if (nandfs_read_inode(fs, node, 0, 1, orig, 0)) {
- nandfs_free_node(node);
- node = NULL;
- goto out;
- }
-
- NANDFS_DEBUG("%s: symlink is %.*s\n",
- __func__, link_len, (char *)orig);
-
- nameidx = (nameidx == 0) ? MAXPATHLEN + 1 : 0;
- bcopy((char *)orig, namebuf + nameidx,
- (unsigned)link_len);
- if (lpath != NULL) {
- namebuf[nameidx + link_len++] = '/';
- strncpy(namebuf + nameidx + link_len, lpath,
- MAXPATHLEN - link_len);
- namebuf[nameidx + MAXPATHLEN] = '\0';
- } else
- namebuf[nameidx + link_len] = '\0';
-
- NANDFS_DEBUG("%s: strp=%s, lpath=%s, namebuf0=%s, "
- "namebuf1=%s, idx=%d\n", __func__, strp, lpath,
- namebuf + 0, namebuf + MAXPATHLEN + 1, nameidx);
-
- lpath = namebuf + nameidx;
-
- nandfs_free_node(node);
-
- /*
- * If absolute pathname, restart at root. Otherwise
- * continue with out parent inode.
- */
- inode = (orig[0] == '/') ? NANDFS_ROOT_INO : pinode;
- node = nandfs_lookup_node(fs, inode);
- }
- }
-
-out:
- free(namebuf);
- free(orig);
- return (node);
-}
-
-static int
-nandfs_read_inode(struct nandfs *fs, struct nandfs_node *node,
- nandfs_daddr_t blknr, u_int nblks, void *buf, int raw)
-{
- uint64_t *pblks;
- uint64_t *vblks;
- u_int i;
- int error;
-
- pblks = malloc(nblks * sizeof(uint64_t));
- vblks = malloc(nblks * sizeof(uint64_t));
-
- NANDFS_DEBUG("nandfs_read_inode fs=%p node=%p blknr=%lld nblks=%d\n",
- fs, node, blknr, nblks);
- for (i = 0; i < nblks; i++) {
- error = nandfs_bmap_lookup(fs, node, blknr + i, &vblks[i], raw);
- if (error) {
- free(pblks);
- free(vblks);
- return (error);
- }
- if (raw == 0)
- pblks[i] = nandfs_vtop(fs, vblks[i]);
- else
- pblks[i] = vblks[i];
- }
-
- for (i = 0; i < nblks; i++) {
- if (ioread(fs->nf_file, pblks[i] * fs->nf_blocksize, buf,
- fs->nf_blocksize)) {
- free(pblks);
- free(vblks);
- return (EIO);
- }
-
- buf = (void *)((uintptr_t)buf + fs->nf_blocksize);
- }
-
- free(pblks);
- free(vblks);
- return (0);
-}
-
-static int
-nandfs_read_blk(struct nandfs *fs, nandfs_daddr_t blknr, void *buf, int phys)
-{
- uint64_t pblknr;
-
- pblknr = (phys ? blknr : nandfs_vtop(fs, blknr));
-
- return (ioread(fs->nf_file, pblknr * fs->nf_blocksize, buf,
- fs->nf_blocksize));
-}
-
-static int
-nandfs_get_checkpoint(struct nandfs *fs, uint64_t cpno,
- struct nandfs_checkpoint *cp)
-{
- uint64_t blocknr;
- int blockoff, cp_per_block, dlen;
- uint8_t *buf;
-
- NANDFS_DEBUG("nandfs_get_checkpoint(fs=%p cpno=%lld)\n", fs, cpno);
-
- buf = malloc(fs->nf_blocksize);
-
- cpno += NANDFS_CPFILE_FIRST_CHECKPOINT_OFFSET - 1;
- dlen = fs->nf_fsdata->f_checkpoint_size;
- cp_per_block = fs->nf_blocksize / dlen;
- blocknr = cpno / cp_per_block;
- blockoff = (cpno % cp_per_block) * dlen;
-
- if (nandfs_read_inode(fs, &fs->nf_cpfile, blocknr, 1, buf, 0)) {
- free(buf);
- return (EINVAL);
- }
-
- memcpy(cp, buf + blockoff, sizeof(struct nandfs_checkpoint));
- free(buf);
-
- return (0);
-}
-
-static uint64_t *
-nandfs_get_map(struct nandfs *fs, struct nandfs_node *node, nandfs_daddr_t blknr,
- int phys)
-{
- struct bmap_buf *bmap;
- uint64_t *map;
-
- LIST_FOREACH(bmap, &node->bmap_bufs, list) {
- if (bmap->blknr == blknr)
- return (bmap->map);
- }
-
- map = malloc(fs->nf_blocksize);
- if (nandfs_read_blk(fs, blknr, map, phys)) {
- free(map);
- return (NULL);
- }
-
- bmap = malloc(sizeof(struct bmap_buf));
- bmap->blknr = blknr;
- bmap->map = map;
-
- LIST_INSERT_HEAD(&node->bmap_bufs, bmap, list);
-
- NANDFS_DEBUG("%s:(node=%p, map=%p)\n", __func__, node, map);
- return (map);
-}
-
-static int
-nandfs_bmap_lookup(struct nandfs *fs, struct nandfs_node *node,
- nandfs_lbn_t lblknr, nandfs_daddr_t *vblknr, int phys)
-{
- struct nandfs_inode *ino;
- nandfs_daddr_t ind_block_num;
- uint64_t *map;
- int idx;
- int level;
-
- ino = node->inode;
-
- if (lblknr < NANDFS_NDADDR) {
- *vblknr = ino->i_db[lblknr];
- return (0);
- }
-
- lblknr -= NANDFS_NDADDR;
-
- /*
- * nindir[0] = NINDIR
- * nindir[1] = NINDIR**2
- * nindir[2] = NINDIR**3
- * etc
- */
- for (level = 0; level < NANDFS_NIADDR; level++) {
- NANDFS_DEBUG("lblknr=%jx fs->nf_nindir[%d]=%d\n", lblknr, level, fs->nf_nindir[level]);
- if (lblknr < fs->nf_nindir[level])
- break;
- lblknr -= fs->nf_nindir[level];
- }
-
- if (level == NANDFS_NIADDR) {
- /* Block number too high */
- NANDFS_DEBUG("lblknr %jx too high\n", lblknr);
- return (EFBIG);
- }
-
- ind_block_num = ino->i_ib[level];
-
- for (; level >= 0; level--) {
- if (ind_block_num == 0) {
- *vblknr = 0; /* missing */
- return (0);
- }
-
- twiddle(1);
- NANDFS_DEBUG("calling get_map with %jx\n", ind_block_num);
- map = nandfs_get_map(fs, node, ind_block_num, phys);
- if (map == NULL)
- return (EIO);
-
- if (level > 0) {
- idx = lblknr / fs->nf_nindir[level - 1];
- lblknr %= fs->nf_nindir[level - 1];
- } else
- idx = lblknr;
-
- ind_block_num = ((nandfs_daddr_t *)map)[idx];
- }
-
- *vblknr = ind_block_num;
-
- return (0);
-}
-
-static nandfs_daddr_t
-nandfs_vtop(struct nandfs *fs, nandfs_daddr_t vblocknr)
-{
- nandfs_lbn_t blocknr;
- nandfs_daddr_t pblocknr;
- int entrynr;
- struct nandfs_dat_entry *dat;
-
- dat = malloc(fs->nf_blocksize);
- nandfs_mdt_trans(&fs->nf_datfile_mdt, vblocknr, &blocknr, &entrynr);
-
- if (nandfs_read_inode(fs, &fs->nf_datfile, blocknr, 1, dat, 1)) {
- free(dat);
- return (0);
- }
-
- NANDFS_DEBUG("nandfs_vtop entrynr=%d vblocknr=%lld pblocknr=%lld\n",
- entrynr, vblocknr, dat[entrynr].de_blocknr);
-
- pblocknr = dat[entrynr].de_blocknr;
- free(dat);
- return (pblocknr);
-}
-
-static void
-nandfs_calc_mdt_consts(int blocksize, struct nandfs_mdt *mdt, int entry_size)
-{
-
- mdt->entries_per_group = blocksize * 8; /* bits in sector */
- mdt->entries_per_block = blocksize / entry_size;
- mdt->blocks_per_group =
- (mdt->entries_per_group -1) / mdt->entries_per_block + 1 + 1;
- mdt->groups_per_desc_block =
- blocksize / sizeof(struct nandfs_block_group_desc);
- mdt->blocks_per_desc_block =
- mdt->groups_per_desc_block * mdt->blocks_per_group + 1;
-}
-
-static void
-nandfs_mdt_trans(struct nandfs_mdt *mdt, uint64_t index,
- nandfs_daddr_t *blocknr, uint32_t *entry_in_block)
-{
- nandfs_daddr_t blknr;
- uint64_t group, group_offset, blocknr_in_group;
- uint64_t desc_block, desc_offset;
-
- /* Calculate our offset in the file */
- group = index / mdt->entries_per_group;
- group_offset = index % mdt->entries_per_group;
- desc_block = group / mdt->groups_per_desc_block;
- desc_offset = group % mdt->groups_per_desc_block;
- blocknr_in_group = group_offset / mdt->entries_per_block;
-
- /* To descgroup offset */
- blknr = 1 + desc_block * mdt->blocks_per_desc_block;
-
- /* To group offset */
- blknr += desc_offset * mdt->blocks_per_group;
-
- /* To actual file block */
- blknr += 1 + blocknr_in_group;
-
- *blocknr = blknr;
- *entry_in_block = group_offset % mdt->entries_per_block;
-}
-
-static int
-ioread(struct open_file *f, off_t pos, void *buf, u_int length)
-{
- void *buffer;
- int err;
- int bsize = ((struct nandfs *)f->f_fsdata)->nf_sectorsize;
- u_int off, nsec;
-
- off = pos % bsize;
- pos /= bsize;
- nsec = howmany(length, bsize);
-
- NANDFS_DEBUG("pos=%lld length=%d off=%d nsec=%d\n", pos, length,
- off, nsec);
-
- buffer = malloc(nsec * bsize);
-
- err = (f->f_dev->dv_strategy)(f->f_devdata, F_READ, pos,
- nsec * bsize, buffer, NULL);
-
- memcpy(buf, (void *)((uintptr_t)buffer + off), length);
- free(buffer);
-
- return (err);
-}
-
-static int
-nandfs_probe_sectorsize(struct open_file *f)
-{
- void *buffer;
- int i, err;
-
- buffer = malloc(16 * 1024);
-
- NANDFS_DEBUG("probing for sector size: ");
-
- for (i = 512; i < (16 * 1024); i <<= 1) {
- NANDFS_DEBUG("%d ", i);
- err = (f->f_dev->dv_strategy)(f->f_devdata, F_READ, 0, i,
- buffer, NULL);
-
- if (err == 0) {
- NANDFS_DEBUG("found");
- free(buffer);
- return (i);
- }
- }
-
- free(buffer);
- NANDFS_DEBUG("not found\n");
- return (-1);
-}