--- /dev/null
+/*
+ * COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or
+ * code or tables extracted from it, as desired without restriction.
+ *
+ * First, the polynomial itself and its table of feedback terms. The
+ * polynomial is
+ * X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
+ *
+ * Note that we take it "backwards" and put the highest-order term in
+ * the lowest-order bit. The X^32 term is "implied"; the LSB is the
+ * X^31 term, etc. The X^0 term (usually shown as "+1") results in
+ * the MSB being 1
+ *
+ * Note that the usual hardware shift register implementation, which
+ * is what we're using (we're merely optimizing it by doing eight-bit
+ * chunks at a time) shifts bits into the lowest-order term. In our
+ * implementation, that means shifting towards the right. Why do we
+ * do it this way? Because the calculated CRC must be transmitted in
+ * order from highest-order term to lowest-order term. UARTs transmit
+ * characters in order from LSB to MSB. By storing the CRC this way
+ * we hand it to the UART in the order low-byte to high-byte; the UART
+ * sends each low-bit to hight-bit; and the result is transmission bit
+ * by bit from highest- to lowest-order term without requiring any bit
+ * shuffling on our part. Reception works similarly
+ *
+ * The feedback terms table consists of 256, 32-bit entries. Notes
+ *
+ * The table can be generated at runtime if desired; code to do so
+ * is shown later. It might not be obvious, but the feedback
+ * terms simply represent the results of eight shift/xor opera
+ * tions for all combinations of data and CRC register values
+ *
+ * The values must be right-shifted by eight bits by the "updcrc
+ * logic; the shift must be unsigned (bring in zeroes). On some
+ * hardware you could probably optimize the shift in assembler by
+ * using byte-swap instructions
+ * polynomial $edb88320
+ */
+#include <linux/types.h>
+
+const u32 crc32_table[256] = {
+ 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
+ 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
+ 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
+ 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
+ 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
+ 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
+ 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
+ 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
+ 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
+ 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
+ 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
+ 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
+ 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
+ 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
+ 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
+ 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
+ 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
+ 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
+ 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
+ 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
+ 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
+ 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
+ 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
+ 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
+ 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
+ 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
+ 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
+ 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
+ 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
+ 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
+ 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
+ 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
+ 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
+ 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
+ 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
+ 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
+ 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
+ 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
+ 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
+ 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
+ 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
+ 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
+ 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
+ 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
+ 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
+ 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
+ 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
+ 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
+ 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
+ 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
+ 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
+ 0x2d02ef8dL
+};
--- /dev/null
+/*
+ * Copyright (C) 2008 Nokia Corporation.
+ * Copyright (C) 2008 University of Szeged, Hungary
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy
+ * Zoltan Sogor
+ */
+
+#include "mkfs.ubifs.h"
+
+#define PROGRAM_VERSION "1.3"
+
+/* The node buffer must allow for worst case compression */
+#define NODE_BUFFER_SIZE (UBIFS_DATA_NODE_SZ + \
+ UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR)
+
+/* Default time granularity in nanoseconds */
+#define DEFAULT_TIME_GRAN 1000000000
+
+#define MKFS_UBIFS_COMPR_NONE 0
+#define MKFS_UBIFS_COMPR_LZO 1
+
+#define MODEM_IMAGE_SIZE 0xc00000
+
+/**
+ * struct idx_entry - index entry.
+ * @next: next index entry (NULL at end of list)
+ * @prev: previous index entry (NULL at beginning of list)
+ * @key: key
+ * @name: directory entry name used for sorting colliding keys by name
+ * @lnum: LEB number
+ * @offs: offset
+ * @len: length
+ *
+ * The index is recorded as a linked list which is sorted and used to create
+ * the bottom level of the on-flash index tree. The remaining levels of the
+ * index tree are each built from the level below.
+ */
+struct idx_entry {
+ struct idx_entry *next;
+ struct idx_entry *prev;
+ union ubifs_key key;
+ char *name;
+ int lnum;
+ int offs;
+ int len;
+};
+
+/*
+ * Because we copy functions from the kernel, we use a subset of the UBIFS
+ * file-system description object struct ubifs_info.
+ */
+struct ubifs_info info_;
+static struct ubifs_info *c = &info_;
+
+/* Debug levels are: 0 (none), 1 (statistics), 2 (files) ,3 (more details) */
+int debug_level;
+int verbose;
+
+/* The 'head' (position) which nodes are written */
+static int head_lnum;
+static int head_offs;
+static int head_flags;
+
+/* The index list */
+static struct idx_entry *idx_list_first;
+static struct idx_entry *idx_list_last;
+static size_t idx_cnt;
+
+/* Global buffers */
+static void *leb_buf;
+static void *node_buf;
+static void *block_buf;
+static void *lzo_mem;
+
+static void *modem_buf;
+
+/* Inode creation sequence number */
+static unsigned long long creat_sqnum;
+
+/**
+ * calc_min_log_lebs - calculate the minimum number of log LEBs needed.
+ * @max_bud_bytes: journal size (buds only)
+ */
+static int calc_min_log_lebs(unsigned long long max_bud_bytes)
+{
+ int buds, log_lebs;
+ unsigned long long log_size;
+
+ buds = (max_bud_bytes + c->leb_size - 1) / c->leb_size;
+ log_size = ALIGN(UBIFS_REF_NODE_SZ, c->min_io_size);
+ log_size *= buds;
+ log_size += ALIGN(UBIFS_CS_NODE_SZ +
+ UBIFS_REF_NODE_SZ * (c->jhead_cnt + 2),
+ c->min_io_size);
+ log_lebs = (log_size + c->leb_size - 1) / c->leb_size;
+ log_lebs += 1;
+ return log_lebs;
+}
+
+static int set_options(int min_io_size, int leb_size, int max_leb_cnt)
+{
+ int lebs;
+
+ c->fanout = 8;
+ c->orph_lebs = 1;
+ c->key_hash = key_r5_hash;
+ c->key_len = UBIFS_SK_LEN;
+ c->default_compr = UBIFS_COMPR_LZO;
+ c->lsave_cnt = 256;
+
+ c->min_io_size = min_io_size;
+ c->leb_size = leb_size;
+ c->max_leb_cnt = max_leb_cnt;
+
+ /* calcuate max_bud_bytes */
+ lebs = c->max_leb_cnt - UBIFS_SB_LEBS - UBIFS_MST_LEBS;
+ lebs -= c->orph_lebs;
+ lebs -= UBIFS_MIN_LOG_LEBS;
+ /*
+ * We do not know lprops geometry so far, so assume minimum
+ * count of lprops LEBs.
+ */
+ lebs -= UBIFS_MIN_LPT_LEBS;
+ /* Make the journal about 12.5% of main area lebs */
+ c->max_bud_bytes = (lebs / 8) * (long long)c->leb_size;
+ /* Make the max journal size 8MiB */
+ if (c->max_bud_bytes > 8 * 1024 * 1024)
+ c->max_bud_bytes = 8 * 1024 * 1024;
+ if (c->max_bud_bytes < 4 * c->leb_size)
+ c->max_bud_bytes = 4 * c->leb_size;
+
+ /* calculate log_lebs */
+ c->log_lebs = calc_min_log_lebs(c->max_bud_bytes);
+ c->log_lebs += 2;
+
+ return 0;
+}
+
+/**
+ * prepare_node - fill in the common header.
+ * @node: node
+ * @len: node length
+ */
+static void prepare_node(void *node, int len)
+{
+ uint32_t crc;
+ struct ubifs_ch *ch = node;
+
+ ch->magic = cpu_to_le32(UBIFS_NODE_MAGIC);
+ ch->len = cpu_to_le32(len);
+ ch->group_type = UBIFS_NO_NODE_GROUP;
+ ch->sqnum = cpu_to_le64(++c->max_sqnum);
+ ch->padding[0] = ch->padding[1] = 0;
+ crc = ubifs_crc32(UBIFS_CRC32_INIT, node + 8, len - 8);
+ ch->crc = cpu_to_le32(crc);
+}
+
+/**
+ * write_leb - copy the image of a LEB to the output target.
+ * @lnum: LEB number
+ * @len: length of data in the buffer
+ * @buf: buffer (must be at least c->leb_size bytes)
+ * @dtype: expected data type
+ */
+int write_leb(int lnum, int len, void *buf, int dtype)
+{
+ unsigned long pos = (unsigned long)lnum * c->leb_size;
+
+ dbg_msg("LEB %d len %d", lnum, len);
+ memset(buf + len, 0xff, c->leb_size - len);
+
+ memcpy(modem_buf + pos, buf, c->leb_size);
+
+ return 0;
+}
+
+/**
+ * write_empty_leb - copy the image of an empty LEB to the output target.
+ * @lnum: LEB number
+ * @dtype: expected data type
+ */
+static int write_empty_leb(int lnum, int dtype)
+{
+ return write_leb(lnum, 0, leb_buf, dtype);
+}
+
+/**
+ * do_pad - pad a buffer to the minimum I/O size.
+ * @buf: buffer
+ * @len: buffer length
+ */
+static int do_pad(void *buf, int len)
+{
+ int pad_len, alen = ALIGN(len, 8), wlen = ALIGN(alen, c->min_io_size);
+ uint32_t crc;
+
+ memset(buf + len, 0xff, alen - len);
+ pad_len = wlen - alen;
+ dbg_msg("len %d pad_len %d", len, pad_len);
+ buf += alen;
+ if (pad_len >= (int)UBIFS_PAD_NODE_SZ) {
+ struct ubifs_ch *ch = buf;
+ struct ubifs_pad_node *pad_node = buf;
+
+ ch->magic = cpu_to_le32(UBIFS_NODE_MAGIC);
+ ch->node_type = UBIFS_PAD_NODE;
+ ch->group_type = UBIFS_NO_NODE_GROUP;
+ ch->padding[0] = ch->padding[1] = 0;
+ ch->sqnum = cpu_to_le64(0);
+ ch->len = cpu_to_le32(UBIFS_PAD_NODE_SZ);
+
+ pad_len -= UBIFS_PAD_NODE_SZ;
+ pad_node->pad_len = cpu_to_le32(pad_len);
+
+ crc = ubifs_crc32(UBIFS_CRC32_INIT, buf + 8,
+ UBIFS_PAD_NODE_SZ - 8);
+ ch->crc = cpu_to_le32(crc);
+
+ memset(buf + UBIFS_PAD_NODE_SZ, 0, pad_len);
+ } else if (pad_len > 0)
+ memset(buf, UBIFS_PADDING_BYTE, pad_len);
+
+ return wlen;
+}
+
+/**
+ * write_node - write a node to a LEB.
+ * @node: node
+ * @len: node length
+ * @lnum: LEB number
+ * @dtype: expected data type
+ */
+static int write_node(void *node, int len, int lnum, int dtype)
+{
+ prepare_node(node, len);
+
+ memcpy(leb_buf, node, len);
+
+ len = do_pad(leb_buf, len);
+
+ return write_leb(lnum, len, leb_buf, dtype);
+}
+
+/**
+ * calc_dark - calculate LEB dark space size.
+ * @c: the UBIFS file-system description object
+ * @spc: amount of free and dirty space in the LEB
+ *
+ * This function calculates amount of dark space in an LEB which has @spc bytes
+ * of free and dirty space. Returns the calculations result.
+ *
+ * Dark space is the space which is not always usable - it depends on which
+ * nodes are written in which order. E.g., if an LEB has only 512 free bytes,
+ * it is dark space, because it cannot fit a large data node. So UBIFS cannot
+ * count on this LEB and treat these 512 bytes as usable because it is not true
+ * if, for example, only big chunks of uncompressible data will be written to
+ * the FS.
+ */
+static int calc_dark(struct ubifs_info *c, int spc)
+{
+ if (spc < c->dark_wm)
+ return spc;
+
+ /*
+ * If we have slightly more space then the dark space watermark, we can
+ * anyway safely assume it we'll be able to write a node of the
+ * smallest size there.
+ */
+ if (spc - c->dark_wm < (int)MIN_WRITE_SZ)
+ return spc - MIN_WRITE_SZ;
+
+ return c->dark_wm;
+}
+
+/**
+ * set_lprops - set the LEB property values for a LEB.
+ * @lnum: LEB number
+ * @offs: end offset of data in the LEB
+ * @flags: LEB property flags
+ */
+static void set_lprops(int lnum, int offs, int flags)
+{
+ int i = lnum - c->main_first, free, dirty;
+ int a = max_t(int, c->min_io_size, 8);
+
+ free = c->leb_size - ALIGN(offs, a);
+ dirty = c->leb_size - free - ALIGN(offs, 8);
+ dbg_msg("LEB %d free %d dirty %d flags %d", lnum, free, dirty,
+ flags);
+ c->lpt[i].free = free;
+ c->lpt[i].dirty = dirty;
+ c->lpt[i].flags = flags;
+ c->lst.total_free += free;
+ c->lst.total_dirty += dirty;
+ if (flags & LPROPS_INDEX)
+ c->lst.idx_lebs += 1;
+ else {
+ int spc;
+
+ spc = free + dirty;
+ if (spc < c->dead_wm)
+ c->lst.total_dead += spc;
+ else
+ c->lst.total_dark += calc_dark(c, spc);
+ c->lst.total_used += c->leb_size - spc;
+ }
+}
+
+/**
+ * add_to_index - add a node key and position to the index.
+ * @key: node key
+ * @lnum: node LEB number
+ * @offs: node offset
+ * @len: node length
+ */
+static int add_to_index(union ubifs_key *key, char *name, int lnum, int offs,
+ int len)
+{
+ struct idx_entry *e;
+
+ dbg_msg("LEB %d offs %d len %d", lnum, offs, len);
+ e = malloc(sizeof(struct idx_entry));
+ if (!e)
+ return err_msg("out of memory");
+
+ e->next = NULL;
+ e->prev = idx_list_last;
+ e->key = *key;
+ e->name = name;
+ e->lnum = lnum;
+ e->offs = offs;
+ e->len = len;
+ if (!idx_list_first)
+ idx_list_first = e;
+ if (idx_list_last)
+ idx_list_last->next = e;
+ idx_list_last = e;
+ idx_cnt += 1;
+ return 0;
+}
+
+/**
+ * flush_nodes - write the current head and move the head to the next LEB.
+ */
+static int flush_nodes(void)
+{
+ int len, err;
+
+ if (!head_offs)
+ return 0;
+ len = do_pad(leb_buf, head_offs);
+ err = write_leb(head_lnum, len, leb_buf, UBI_UNKNOWN);
+ if (err)
+ return err;
+ set_lprops(head_lnum, head_offs, head_flags);
+ head_lnum += 1;
+ head_offs = 0;
+
+ return 0;
+}
+
+/**
+ * reserve_space - reserve space for a node on the head.
+ * @len: node length
+ * @lnum: LEB number is returned here
+ * @offs: offset is returned here
+ */
+static int reserve_space(int len, int *lnum, int *offs)
+{
+ int err;
+
+ if (len > c->leb_size - head_offs) {
+ err = flush_nodes();
+ if (err)
+ return err;
+ }
+ *lnum = head_lnum;
+ *offs = head_offs;
+ head_offs += ALIGN(len, 8);
+ return 0;
+}
+
+/**
+ * add_node - write a node to the head.
+ * @key: node key
+ * @node: node
+ * @len: node length
+ */
+static int add_node(union ubifs_key *key, char *name, void *node, int len)
+{
+ int err, lnum, offs;
+
+ prepare_node(node, len);
+
+ err = reserve_space(len, &lnum, &offs);
+ if (err)
+ return err;
+
+ memcpy(leb_buf + offs, node, len);
+ memset(leb_buf + offs + len, 0xff, ALIGN(len, 8) - len);
+
+ add_to_index(key, name, lnum, offs, len);
+
+ return 0;
+}
+
+/**
+ * add_inode_with_data - write an inode.
+ */
+static int add_inode_with_data(unsigned long file_size, ino_t inum, void *data,
+ unsigned int data_len)
+{
+ struct ubifs_ino_node *ino = node_buf;
+ union ubifs_key key;
+ int len, use_flags = 0;
+
+ creat_sqnum = c->max_sqnum;
+
+ use_flags |= UBIFS_COMPR_FL;
+
+ memset(ino, 0, UBIFS_INO_NODE_SZ);
+
+ ino_key_init(c, &key, inum);
+ ino->ch.node_type = UBIFS_INO_NODE;
+ key_write(c, &key, &ino->key);
+ ino->size = cpu_to_le64(file_size);
+
+ if (inum == UBIFS_ROOT_INO) {
+ ino->creat_sqnum = cpu_to_le64(1);
+ ino->nlink = cpu_to_le32(2);
+ ino->atime_sec = cpu_to_le64(0x4ca2dfd9);
+ ino->ctime_sec = cpu_to_le64(0x4ca2dfd9);
+ ino->mtime_sec = cpu_to_le64(0x4ca2dfd9);
+ ino->mode = cpu_to_le32(0x41ed);
+ } else {
+ ino->creat_sqnum = cpu_to_le64(2);
+ ino->nlink = cpu_to_le32(1);
+ ino->atime_sec = cpu_to_le64(0x4ca2dfd9);
+ ino->ctime_sec = cpu_to_le64(0x4ca2dfd9);
+ ino->mtime_sec = cpu_to_le64(0x4ca2dfd9);
+ ino->uid = cpu_to_le32(1000);
+ ino->gid = cpu_to_le32(513);
+ ino->mode = cpu_to_le32(0x81c0);
+ }
+
+ ino->flags = cpu_to_le32(use_flags);
+ ino->data_len = cpu_to_le32(data_len);
+ ino->compr_type = cpu_to_le16(c->default_compr);
+ if (data_len)
+ memcpy(&ino->data, data, data_len);
+
+ len = UBIFS_INO_NODE_SZ + data_len;
+
+ return add_node(&key, NULL, ino, len);
+}
+
+/**
+ * add_inode - write an inode.
+ */
+static int add_inode(unsigned long file_size, ino_t inum)
+{
+ return add_inode_with_data(file_size, inum, NULL, 0);
+}
+
+/**
+ * add_dent_node - write a directory entry node.
+ * @dir_inum: target inode number of directory
+ * @name: directory entry name
+ * @inum: target inode number of the directory entry
+ * @type: type of the target inode
+ */
+static int add_dent_node(ino_t dir_inum, const char *name, ino_t inum,
+ unsigned char type)
+{
+ struct ubifs_dent_node *dent = node_buf;
+ union ubifs_key key;
+ struct qstr dname;
+ char *kname;
+ int len;
+
+ dbg_msg("%s ino %lu type %u dir ino %lu", name, inum,
+ (unsigned)type, dir_inum);
+ memset(dent, 0, UBIFS_DENT_NODE_SZ);
+
+ dname.name = (void *)name;
+ dname.len = strlen(name);
+
+ dent->ch.node_type = UBIFS_DENT_NODE;
+
+ dent_key_init(c, &key, dir_inum, &dname);
+ key_write(c, &key, dent->key);
+ dent->inum = cpu_to_le64(inum);
+ dent->padding1 = 0;
+ dent->type = type;
+ dent->nlen = cpu_to_le16(dname.len);
+ memcpy(dent->name, dname.name, dname.len);
+ dent->name[dname.len] = '\0';
+
+ len = UBIFS_DENT_NODE_SZ + dname.len + 1;
+
+ kname = strdup(name);
+ if (!kname)
+ return err_msg("cannot allocate memory");
+
+ return add_node(&key, kname, dent, len);
+}
+
+/**
+ * add_data_node - write the data of a file to the output buffer.
+ */
+static int add_data_node(unsigned long file_size, void *src_addr, ino_t inum)
+{
+ struct ubifs_data_node *dn = node_buf;
+ void *buf = block_buf;
+ ssize_t bytes_read, offset;
+ union ubifs_key key;
+ int dn_len, err;
+ unsigned int block_no = 0;
+ size_t out_len;
+
+ creat_sqnum = c->max_sqnum++;
+
+ bytes_read = 0;
+ offset = 0;
+
+ do {
+ memset(buf, 0, UBIFS_BLOCK_SIZE);
+ if (offset + UBIFS_BLOCK_SIZE > file_size) {
+ memcpy(buf, src_addr + offset, file_size - offset);
+ bytes_read = file_size - offset;
+ } else {
+ memcpy(buf, src_addr + offset, UBIFS_BLOCK_SIZE);
+ bytes_read = UBIFS_BLOCK_SIZE;
+ }
+
+ /* Make data node */
+ memset(dn, 0, UBIFS_DATA_NODE_SZ);
+ data_key_init(c, &key, inum, block_no++);
+ dn->ch.node_type = UBIFS_DATA_NODE;
+ key_write(c, &key, &dn->key);
+ dn->size = cpu_to_le32(bytes_read);
+ memcpy(&dn->data, buf, bytes_read);
+ out_len = bytes_read;
+
+ err = lzo1x_1_compress(buf, bytes_read, &dn->data,
+ &out_len, lzo_mem);
+ if (err != LZO_E_OK)
+ return err;
+ dn->compr_type = cpu_to_le16(MKFS_UBIFS_COMPR_LZO);
+ dn_len = UBIFS_DATA_NODE_SZ + out_len;
+ /* Add data node to file system */
+
+ err = add_node(&key, NULL, dn, dn_len);
+ if (err)
+ return err;
+
+ offset += UBIFS_BLOCK_SIZE;
+ } while (offset < file_size);
+
+ return err;
+}
+
+static int namecmp(const char *name1, const char *name2)
+{
+ size_t len1 = strlen(name1), len2 = strlen(name2);
+ size_t clen = (len1 < len2) ? len1 : len2;
+ int cmp;
+
+ cmp = memcmp(name1, name2, clen);
+ if (cmp)
+ return cmp;
+ return (len1 < len2) ? -1 : 1;
+}
+
+static int cmp_idx(const void *a, const void *b)
+{
+ const struct idx_entry *e1 = *(const struct idx_entry **)a;
+ const struct idx_entry *e2 = *(const struct idx_entry **)b;
+ int cmp;
+
+ cmp = keys_cmp(c, &e1->key, &e2->key);
+ if (cmp)
+ return cmp;
+ return namecmp(e1->name, e2->name);
+}
+
+/**
+ * add_idx_node - write an index node to the head.
+ * @node: index node
+ * @child_cnt: number of children of this index node
+ */
+static int add_idx_node(void *node, int child_cnt)
+{
+ int err, lnum, offs, len;
+
+ len = ubifs_idx_node_sz(c, child_cnt);
+
+ prepare_node(node, len);
+
+ err = reserve_space(len, &lnum, &offs);
+ if (err)
+ return err;
+
+ memcpy(leb_buf + offs, node, len);
+ memset(leb_buf + offs + len, 0xff, ALIGN(len, 8) - len);
+
+ c->old_idx_sz += ALIGN(len, 8);
+
+ dbg_msg("at %d:%d len %d index size %llu", lnum, offs, len,
+ c->old_idx_sz);
+
+ /* The last index node written will be the root */
+ c->zroot.lnum = lnum;
+ c->zroot.offs = offs;
+ c->zroot.len = len;
+
+ return 0;
+}
+
+/**
+ * write_index - write out the index.
+ */
+static int write_index(void)
+{
+ size_t sz, i, cnt, idx_sz, pstep, bcnt;
+ struct idx_entry **idx_ptr, **p;
+ struct ubifs_idx_node *idx;
+ struct ubifs_branch *br;
+ int child_cnt, j, level, blnum, boffs, blen, blast_len, err;
+
+ dbg_msg("leaf node count: %zd", idx_cnt);
+
+ /* Reset the head for the index */
+ head_flags = LPROPS_INDEX;
+ /* Allocate index node */
+ idx_sz = ubifs_idx_node_sz(c, c->fanout);
+ idx = malloc(idx_sz);
+ if (!idx)
+ return err_msg("out of memory");
+
+ /* Make an array of pointers to sort the index list */
+ sz = idx_cnt * sizeof(struct idx_entry *);
+ if (sz / sizeof(struct idx_entry *) != idx_cnt) {
+ free(idx);
+ return err_msg("index is too big (%zu entries)", idx_cnt);
+ }
+ idx_ptr = malloc(sz);
+ if (!idx_ptr) {
+ free(idx);
+ return err_msg("out of memory - needed %zu bytes for index",
+ sz);
+ }
+ idx_ptr[0] = idx_list_first;
+ for (i = 1; i < idx_cnt; i++)
+ idx_ptr[i] = idx_ptr[i - 1]->next;
+ ubifs_qsort(idx_ptr, idx_cnt, sizeof(struct idx_entry *), cmp_idx);
+ /* Write level 0 index nodes */
+ cnt = idx_cnt / c->fanout;
+ if (idx_cnt % c->fanout)
+ cnt += 1;
+ p = idx_ptr;
+ blnum = head_lnum;
+ boffs = head_offs;
+ for (i = 0; i < cnt; i++) {
+ /*
+ * Calculate the child count. All index nodes are created full
+ * except for the last index node on each row.
+ */
+ if (i == cnt - 1) {
+ child_cnt = idx_cnt % c->fanout;
+ if (child_cnt == 0)
+ child_cnt = c->fanout;
+ } else
+ child_cnt = c->fanout;
+ memset(idx, 0, idx_sz);
+ idx->ch.node_type = UBIFS_IDX_NODE;
+ idx->child_cnt = cpu_to_le16(child_cnt);
+ idx->level = cpu_to_le16(0);
+ for (j = 0; j < child_cnt; j++, p++) {
+ br = ubifs_idx_branch(c, idx, j);
+ key_write_idx(c, &(*p)->key, &br->key);
+ br->lnum = cpu_to_le32((*p)->lnum);
+ br->offs = cpu_to_le32((*p)->offs);
+ br->len = cpu_to_le32((*p)->len);
+ }
+ add_idx_node(idx, child_cnt);
+ }
+ /* Write level 1 index nodes and above */
+ level = 0;
+ pstep = 1;
+ while (cnt > 1) {
+ /*
+ * 'blast_len' is the length of the last index node in the level
+ * below.
+ */
+ blast_len = ubifs_idx_node_sz(c, child_cnt);
+ /* 'bcnt' is the number of index nodes in the level below */
+ bcnt = cnt;
+ /* 'cnt' is the number of index nodes in this level */
+ cnt = (cnt + c->fanout - 1) / c->fanout;
+ if (cnt == 0)
+ cnt = 1;
+ level += 1;
+ /*
+ * The key of an index node is the same as the key of its first
+ * child. Thus we can get the key by stepping along the bottom
+ * level 'p' with an increasing large step 'pstep'.
+ */
+ p = idx_ptr;
+ pstep *= c->fanout;
+ for (i = 0; i < cnt; i++) {
+ /*
+ * Calculate the child count. All index nodes are
+ * created full except for the last index node on each
+ * row.
+ */
+ if (i == cnt - 1) {
+ child_cnt = bcnt % c->fanout;
+ if (child_cnt == 0)
+ child_cnt = c->fanout;
+ } else
+ child_cnt = c->fanout;
+ memset(idx, 0, idx_sz);
+ idx->ch.node_type = UBIFS_IDX_NODE;
+ idx->child_cnt = cpu_to_le16(child_cnt);
+ idx->level = cpu_to_le16(level);
+ for (j = 0; j < child_cnt; j++) {
+ size_t bn = i * c->fanout + j;
+
+ /*
+ * The length of the index node in the level
+ * below is 'idx_sz' except when it is the last
+ * node on the row. i.e. all the others on the
+ * row are full.
+ */
+ if (bn == bcnt - 1)
+ blen = blast_len;
+ else
+ blen = idx_sz;
+ /*
+ * 'blnum' and 'boffs' hold the position of the
+ * index node on the level below.
+ */
+ if (boffs + blen > c->leb_size) {
+ blnum += 1;
+ boffs = 0;
+ }
+ /*
+ * Fill in the branch with the key and position
+ * of the index node from the level below.
+ */
+ br = ubifs_idx_branch(c, idx, j);
+ key_write_idx(c, &(*p)->key, &br->key);
+ br->lnum = cpu_to_le32(blnum);
+ br->offs = cpu_to_le32(boffs);
+ br->len = cpu_to_le32(blen);
+ /*
+ * Step to the next index node on the level
+ * below.
+ */
+ boffs += ALIGN(blen, 8);
+ p += pstep;
+ }
+ add_idx_node(idx, child_cnt);
+ }
+ }
+
+ /* Free stuff */
+ for (i = 0; i < idx_cnt; i++)
+ free(idx_ptr[i]);
+ free(idx_ptr);
+ free(idx);
+
+ dbg_msg("zroot is at %d:%d len %d", c->zroot.lnum, c->zroot.offs,
+ c->zroot.len);
+
+ /* Set the index head */
+ c->ihead_lnum = head_lnum;
+ c->ihead_offs = ALIGN(head_offs, c->min_io_size);
+ dbg_msg("ihead is at %d:%d", c->ihead_lnum, c->ihead_offs);
+
+ /* Flush the last index LEB */
+ err = flush_nodes();
+ if (err)
+ return err;
+
+ return 0;
+}
+
+/**
+ * set_gc_lnum - set the LEB number reserved for the garbage collector.
+ */
+static int set_gc_lnum(void)
+{
+ int err;
+
+ c->gc_lnum = head_lnum++;
+
+ err = write_empty_leb(c->gc_lnum, UBI_LONGTERM);
+ if (err)
+ return err;
+ set_lprops(c->gc_lnum, 0, 0);
+ c->lst.empty_lebs += 1;
+ return 0;
+}
+
+/**
+ * finalize_leb_cnt - now that we know how many LEBs we used.
+ */
+static int finalize_leb_cnt(void)
+{
+ c->leb_cnt = head_lnum;
+ if (c->leb_cnt > c->max_leb_cnt)
+ /* TODO: in this case it segfaults because buffer overruns - we
+ * somewhere allocate smaller buffers - fix */
+ return err_msg("max_leb_cnt too low (%d needed)", c->leb_cnt);
+ c->main_lebs = c->leb_cnt - c->main_first;
+
+ c->max_bud_bytes = c->leb_size * (c->main_lebs - 1);
+
+ return 0;
+}
+
+/**
+ * write_super - write the super block.
+ */
+static int write_super(void)
+{
+ struct ubifs_sb_node sup;
+ int i;
+
+ memset(&sup, 0, UBIFS_SB_NODE_SZ);
+
+ sup.ch.node_type = UBIFS_SB_NODE;
+ sup.key_hash = c->key_hash_type;
+ sup.min_io_size = cpu_to_le32(c->min_io_size);
+ sup.leb_size = cpu_to_le32(c->leb_size);
+ sup.leb_cnt = cpu_to_le32(c->leb_cnt);
+ sup.max_leb_cnt = cpu_to_le32(c->max_leb_cnt);
+ sup.max_bud_bytes = cpu_to_le64(c->max_bud_bytes);
+ sup.log_lebs = cpu_to_le32(c->log_lebs);
+ sup.lpt_lebs = cpu_to_le32(c->lpt_lebs);
+ sup.orph_lebs = cpu_to_le32(c->orph_lebs);
+ sup.jhead_cnt = cpu_to_le32(c->jhead_cnt);
+ sup.fanout = cpu_to_le32(c->fanout);
+ sup.lsave_cnt = cpu_to_le32(c->lsave_cnt);
+ sup.fmt_version = cpu_to_le32(UBIFS_FORMAT_VERSION);
+ sup.default_compr = cpu_to_le16(c->default_compr);
+ sup.rp_size = cpu_to_le64(c->rp_size);
+ sup.time_gran = cpu_to_le32(DEFAULT_TIME_GRAN);
+
+ for (i = 0; i < 16; i++)
+ sup.uuid[i] = 1;
+
+ if (c->big_lpt)
+ sup.flags |= cpu_to_le32(UBIFS_FLG_BIGLPT);
+
+ return write_node(&sup, UBIFS_SB_NODE_SZ, UBIFS_SB_LNUM, UBI_LONGTERM);
+}
+
+/**
+ * write_master - write the master node.
+ */
+static int write_master(void)
+{
+ struct ubifs_mst_node mst;
+ int err;
+
+ memset(&mst, 0, UBIFS_MST_NODE_SZ);
+
+ mst.ch.node_type = UBIFS_MST_NODE;
+ mst.log_lnum = cpu_to_le32(UBIFS_LOG_LNUM);
+ mst.highest_inum = cpu_to_le64(c->highest_inum);
+ mst.cmt_no = cpu_to_le64(0);
+ mst.flags = cpu_to_le32(UBIFS_MST_NO_ORPHS);
+ mst.root_lnum = cpu_to_le32(c->zroot.lnum);
+ mst.root_offs = cpu_to_le32(c->zroot.offs);
+ mst.root_len = cpu_to_le32(c->zroot.len);
+ mst.gc_lnum = cpu_to_le32(c->gc_lnum);
+ mst.ihead_lnum = cpu_to_le32(c->ihead_lnum);
+ mst.ihead_offs = cpu_to_le32(c->ihead_offs);
+ mst.index_size = cpu_to_le64(c->old_idx_sz);
+ mst.lpt_lnum = cpu_to_le32(c->lpt_lnum);
+ mst.lpt_offs = cpu_to_le32(c->lpt_offs);
+ mst.nhead_lnum = cpu_to_le32(c->nhead_lnum);
+ mst.nhead_offs = cpu_to_le32(c->nhead_offs);
+ mst.ltab_lnum = cpu_to_le32(c->ltab_lnum);
+ mst.ltab_offs = cpu_to_le32(c->ltab_offs);
+ mst.lsave_lnum = cpu_to_le32(c->lsave_lnum);
+ mst.lsave_offs = cpu_to_le32(c->lsave_offs);
+ mst.lscan_lnum = cpu_to_le32(c->lscan_lnum);
+ mst.empty_lebs = cpu_to_le32(c->lst.empty_lebs);
+ mst.idx_lebs = cpu_to_le32(c->lst.idx_lebs);
+ mst.total_free = cpu_to_le64(c->lst.total_free);
+ mst.total_dirty = cpu_to_le64(c->lst.total_dirty);
+ mst.total_used = cpu_to_le64(c->lst.total_used);
+ mst.total_dead = cpu_to_le64(c->lst.total_dead);
+ mst.total_dark = cpu_to_le64(c->lst.total_dark);
+ mst.leb_cnt = cpu_to_le32(c->leb_cnt);
+
+ err = write_node(&mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM,
+ UBI_SHORTTERM);
+ if (err)
+ return err;
+
+ err = write_node(&mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM + 1,
+ UBI_SHORTTERM);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+/**
+ * write_log - write an empty log.
+ */
+static int write_log(void)
+{
+ struct ubifs_cs_node cs;
+ int err, i, lnum;
+
+ lnum = UBIFS_LOG_LNUM;
+
+ cs.ch.node_type = UBIFS_CS_NODE;
+ cs.cmt_no = cpu_to_le64(0);
+
+ err = write_node(&cs, UBIFS_CS_NODE_SZ, lnum, UBI_UNKNOWN);
+ if (err)
+ return err;
+
+ lnum += 1;
+
+ for (i = 1; i < c->log_lebs; i++, lnum++) {
+ err = write_empty_leb(lnum, UBI_UNKNOWN);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+
+/**
+ * pack_bits - pack bit fields end-to-end.
+ * @addr: address at which to pack (passed and next address returned)
+ * @pos: bit position at which to pack (passed and next position returned)
+ * @val: value to pack
+ * @nrbits: number of bits of value to pack (1-32)
+ */
+static void pack_bits(uint8_t **addr, int *pos, uint32_t val, int nrbits)
+{
+ uint8_t *p = *addr;
+ int b = *pos;
+
+ if (b) {
+ *p |= ((uint8_t)val) << b;
+ nrbits += b;
+ if (nrbits > 8) {
+ *++p = (uint8_t)(val >>= (8 - b));
+ if (nrbits > 16) {
+ *++p = (uint8_t)(val >>= 8);
+ if (nrbits > 24) {
+ *++p = (uint8_t)(val >>= 8);
+ if (nrbits > 32)
+ *++p = (uint8_t)(val >>= 8);
+ }
+ }
+ }
+ } else {
+ *p = (uint8_t)val;
+ if (nrbits > 8) {
+ *++p = (uint8_t)(val >>= 8);
+ if (nrbits > 16) {
+ *++p = (uint8_t)(val >>= 8);
+ if (nrbits > 24)
+ *++p = (uint8_t)(val >>= 8);
+ }
+ }
+ }
+ b = nrbits & 7;
+ if (b == 0)
+ p++;
+ *addr = p;
+ *pos = b;
+}
+
+/**
+ * pack_pnode - pack all the bit fields of a pnode.
+ * @c: UBIFS file-system description object
+ * @buf: buffer into which to pack
+ * @pnode: pnode to pack
+ */
+static void pack_pnode(struct ubifs_info *c, void *buf,
+ struct ubifs_pnode *pnode)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0;
+ uint16_t crc;
+
+ pack_bits(&addr, &pos, UBIFS_LPT_PNODE, UBIFS_LPT_TYPE_BITS);
+ if (c->big_lpt)
+ pack_bits(&addr, &pos, pnode->num, c->pcnt_bits);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ pack_bits(&addr, &pos, pnode->lprops[i].free >> 3,
+ c->space_bits);
+ pack_bits(&addr, &pos, pnode->lprops[i].dirty >> 3,
+ c->space_bits);
+ if (pnode->lprops[i].flags & LPROPS_INDEX)
+ pack_bits(&addr, &pos, 1, 1);
+ else
+ pack_bits(&addr, &pos, 0, 1);
+ }
+ crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ c->pnode_sz - UBIFS_LPT_CRC_BYTES);
+ addr = buf;
+ pos = 0;
+ pack_bits(&addr, &pos, crc, UBIFS_LPT_CRC_BITS);
+}
+
+/**
+ * calc_nnode_num - calculate nnode number.
+ * @row: the row in the tree (root is zero)
+ * @col: the column in the row (leftmost is zero)
+ *
+ * The nnode number is a number that uniquely identifies a nnode and can be used
+ * easily to traverse the tree from the root to that nnode.
+ *
+ * This function calculates and returns the nnode number for the nnode at @row
+ * and @col.
+ */
+static int calc_nnode_num(int row, int col)
+{
+ int num, bits;
+
+ num = 1;
+ while (row--) {
+ bits = (col & (UBIFS_LPT_FANOUT - 1));
+ col >>= UBIFS_LPT_FANOUT_SHIFT;
+ num <<= UBIFS_LPT_FANOUT_SHIFT;
+ num |= bits;
+ }
+ return num;
+}
+
+/**
+ * pack_nnode - pack all the bit fields of a nnode.
+ * @c: UBIFS file-system description object
+ * @buf: buffer into which to pack
+ * @nnode: nnode to pack
+ */
+static void pack_nnode(struct ubifs_info *c, void *buf,
+ struct ubifs_nnode *nnode)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0;
+ uint16_t crc;
+
+ pack_bits(&addr, &pos, UBIFS_LPT_NNODE, UBIFS_LPT_TYPE_BITS);
+ if (c->big_lpt)
+ pack_bits(&addr, &pos, nnode->num, c->pcnt_bits);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ int lnum = nnode->nbranch[i].lnum;
+
+ if (lnum == 0)
+ lnum = c->lpt_last + 1;
+ pack_bits(&addr, &pos, lnum - c->lpt_first, c->lpt_lnum_bits);
+ pack_bits(&addr, &pos, nnode->nbranch[i].offs,
+ c->lpt_offs_bits);
+ }
+ crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ c->nnode_sz - UBIFS_LPT_CRC_BYTES);
+ addr = buf;
+ pos = 0;
+ pack_bits(&addr, &pos, crc, UBIFS_LPT_CRC_BITS);
+}
+
+/**
+ * pack_lsave - pack the LPT's save table.
+ * @c: UBIFS file-system description object
+ * @buf: buffer into which to pack
+ * @lsave: LPT's save table to pack
+ */
+static void pack_lsave(struct ubifs_info *c, void *buf, int *lsave)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0;
+ uint16_t crc;
+
+ pack_bits(&addr, &pos, UBIFS_LPT_LSAVE, UBIFS_LPT_TYPE_BITS);
+ for (i = 0; i < c->lsave_cnt; i++)
+ pack_bits(&addr, &pos, lsave[i], c->lnum_bits);
+ crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ c->lsave_sz - UBIFS_LPT_CRC_BYTES);
+ addr = buf;
+ pos = 0;
+ pack_bits(&addr, &pos, crc, UBIFS_LPT_CRC_BITS);
+}
+
+/**
+ * set_ltab - set LPT LEB properties.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number
+ * @free: amount of free space
+ * @dirty: amount of dirty space
+ */
+static void set_ltab(struct ubifs_info *c, int lnum, int free, int dirty)
+{
+ dbg_msg("LEB %d free %d dirty %d to %d %d",
+ lnum, c->ltab[lnum - c->lpt_first].free,
+ c->ltab[lnum - c->lpt_first].dirty, free, dirty);
+ c->ltab[lnum - c->lpt_first].free = free;
+ c->ltab[lnum - c->lpt_first].dirty = dirty;
+}
+
+/**
+ * pack_ltab - pack the LPT's own lprops table.
+ * @c: UBIFS file-system description object
+ * @buf: buffer into which to pack
+ * @ltab: LPT's own lprops table to pack
+ */
+static void pack_ltab(struct ubifs_info *c, void *buf,
+ struct ubifs_lpt_lprops *ltab)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0;
+ uint16_t crc;
+
+ pack_bits(&addr, &pos, UBIFS_LPT_LTAB, UBIFS_LPT_TYPE_BITS);
+ for (i = 0; i < c->lpt_lebs; i++) {
+ pack_bits(&addr, &pos, ltab[i].free, c->lpt_spc_bits);
+ pack_bits(&addr, &pos, ltab[i].dirty, c->lpt_spc_bits);
+ }
+ crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ c->ltab_sz - UBIFS_LPT_CRC_BYTES);
+ addr = buf;
+ pos = 0;
+ pack_bits(&addr, &pos, crc, UBIFS_LPT_CRC_BITS);
+}
+
+/**
+ * create_lpt - create LPT.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int create_lpt(struct ubifs_info *c)
+{
+ int lnum, err = 0, i, j, cnt, len, alen, row;
+ int blnum, boffs, bsz, bcnt;
+ struct ubifs_pnode *pnode = NULL;
+ struct ubifs_nnode *nnode = NULL;
+ void *buf = NULL, *p;
+ int *lsave = NULL;
+
+ pnode = malloc(sizeof(struct ubifs_pnode));
+ nnode = malloc(sizeof(struct ubifs_nnode));
+ buf = malloc(c->leb_size);
+ lsave = malloc(sizeof(int) * c->lsave_cnt);
+ if (!pnode || !nnode || !buf || !lsave) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memset(pnode, 0 , sizeof(struct ubifs_pnode));
+ memset(nnode, 0 , sizeof(struct ubifs_pnode));
+
+ c->lscan_lnum = c->main_first;
+
+ lnum = c->lpt_first;
+ p = buf;
+ len = 0;
+ /* Number of leaf nodes (pnodes) */
+ cnt = (c->main_lebs + UBIFS_LPT_FANOUT - 1) >> UBIFS_LPT_FANOUT_SHIFT;
+ //printf("pnode_cnt=%d\n",cnt);
+
+ /*
+ * To calculate the internal node branches, we keep information about
+ * the level below.
+ */
+ blnum = lnum; /* LEB number of level below */
+ boffs = 0; /* Offset of level below */
+ bcnt = cnt; /* Number of nodes in level below */
+ bsz = c->pnode_sz; /* Size of nodes in level below */
+
+ /* Add pnodes */
+ for (i = 0; i < cnt; i++) {
+ if (len + c->pnode_sz > c->leb_size) {
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen, alen - len);
+ memset(p, 0xff, alen - len);
+ err = write_leb(lnum++, alen, buf, UBI_SHORTTERM);
+ if (err)
+ goto out;
+ p = buf;
+ len = 0;
+ }
+ /* Fill in the pnode */
+ for (j = 0; j < UBIFS_LPT_FANOUT; j++) {
+ int k = (i << UBIFS_LPT_FANOUT_SHIFT) + j;
+
+ if (k < c->main_lebs)
+ pnode->lprops[j] = c->lpt[k];
+ else {
+ pnode->lprops[j].free = c->leb_size;
+ pnode->lprops[j].dirty = 0;
+ pnode->lprops[j].flags = 0;
+ }
+ }
+ pack_pnode(c, p, pnode);
+ p += c->pnode_sz;
+ len += c->pnode_sz;
+ /*
+ * pnodes are simply numbered left to right starting at zero,
+ * which means the pnode number can be used easily to traverse
+ * down the tree to the corresponding pnode.
+ */
+ pnode->num += 1;
+ }
+
+ row = c->lpt_hght - 1;
+ /* Add all nnodes, one level at a time */
+ while (1) {
+ /* Number of internal nodes (nnodes) at next level */
+ cnt = (cnt + UBIFS_LPT_FANOUT - 1) / UBIFS_LPT_FANOUT;
+ if (cnt == 0)
+ cnt = 1;
+ for (i = 0; i < cnt; i++) {
+ if (len + c->nnode_sz > c->leb_size) {
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen,
+ alen - len);
+ memset(p, 0xff, alen - len);
+ err = write_leb(lnum++, alen, buf, UBI_SHORTTERM);
+ if (err)
+ goto out;
+ p = buf;
+ len = 0;
+ }
+ /* The root is on row zero */
+ if (row == 0) {
+ c->lpt_lnum = lnum;
+ c->lpt_offs = len;
+ }
+ /* Set branches to the level below */
+ for (j = 0; j < UBIFS_LPT_FANOUT; j++) {
+ if (bcnt) {
+ if (boffs + bsz > c->leb_size) {
+ blnum += 1;
+ boffs = 0;
+ }
+ nnode->nbranch[j].lnum = blnum;
+ nnode->nbranch[j].offs = boffs;
+ boffs += bsz;
+ bcnt--;
+ } else {
+ nnode->nbranch[j].lnum = 0;
+ nnode->nbranch[j].offs = 0;
+ }
+ }
+ nnode->num = calc_nnode_num(row, i);
+ pack_nnode(c, p, nnode);
+ p += c->nnode_sz;
+ len += c->nnode_sz;
+ }
+ /* Row zero is the top row */
+ if (row == 0)
+ break;
+ /* Update the information about the level below */
+ bcnt = cnt;
+ bsz = c->nnode_sz;
+ row -= 1;
+ }
+
+ if (c->big_lpt) {
+ /* Need to add LPT's save table */
+ if (len + c->lsave_sz > c->leb_size) {
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen, alen - len);
+ memset(p, 0xff, alen - len);
+ err = write_leb(lnum++, alen, buf, UBI_SHORTTERM);
+ if (err)
+ goto out;
+ p = buf;
+ len = 0;
+ }
+
+ c->lsave_lnum = lnum;
+ c->lsave_offs = len;
+
+ for (i = 0; i < c->lsave_cnt; i++)
+ lsave[i] = c->main_first + i;
+
+ pack_lsave(c, p, lsave);
+ p += c->lsave_sz;
+ len += c->lsave_sz;
+ }
+
+ /* Need to add LPT's own LEB properties table */
+ if (len + c->ltab_sz > c->leb_size) {
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen, alen - len);
+ memset(p, 0xff, alen - len);
+ err = write_leb(lnum++, alen, buf, UBI_SHORTTERM);
+ if (err)
+ goto out;
+ p = buf;
+ len = 0;
+ }
+
+ c->ltab_lnum = lnum;
+ c->ltab_offs = len;
+
+ /* Update ltab before packing it */
+ len += c->ltab_sz;
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen, alen - len);
+
+ pack_ltab(c, p, c->ltab);
+ p += c->ltab_sz;
+
+ /* Write remaining buffer */
+ memset(p, 0xff, alen - len);
+ err = write_leb(lnum, alen, buf, UBI_SHORTTERM);
+ if (err)
+ goto out;
+
+ c->nhead_lnum = lnum;
+ c->nhead_offs = ALIGN(len, c->min_io_size);
+
+out:
+ return err;
+}
+
+/**
+ * write_lpt - write the LEB properties tree.
+ */
+static int write_lpt(void)
+{
+ int err, lnum;
+
+ err = create_lpt(c);
+ if (err)
+ return err;
+
+ lnum = c->nhead_lnum + 1;
+ while (lnum <= c->lpt_last) {
+ err = write_empty_leb(lnum++, UBI_SHORTTERM);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * write_orphan_area - write an empty orphan area.
+ */
+static int write_orphan_area(void)
+{
+ int err, i, lnum;
+
+ lnum = UBIFS_LOG_LNUM + c->log_lebs + c->lpt_lebs;
+ for (i = 0; i < c->orph_lebs; i++, lnum++) {
+ err = write_empty_leb(lnum, UBI_SHORTTERM);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
+/**
+ * do_calc_lpt_geom - calculate sizes for the LPT area.
+ * @c: the UBIFS file-system description object
+ *
+ * Calculate the sizes of LPT bit fields, nodes, and tree, based on the
+ * properties of the flash and whether LPT is "big" (c->big_lpt).
+ */
+static void do_calc_lpt_geom(struct ubifs_info *c)
+{
+ int n, bits, per_leb_wastage;
+ long long sz, tot_wastage;
+
+ c->pnode_cnt = (c->main_lebs + UBIFS_LPT_FANOUT - 1) / UBIFS_LPT_FANOUT;
+
+ n = (c->pnode_cnt + UBIFS_LPT_FANOUT - 1) / UBIFS_LPT_FANOUT;
+ c->nnode_cnt = n;
+ while (n > 1) {
+ n = (n + UBIFS_LPT_FANOUT - 1) / UBIFS_LPT_FANOUT;
+ c->nnode_cnt += n;
+ }
+
+ c->lpt_hght = 1;
+ n = UBIFS_LPT_FANOUT;
+ while (n < c->pnode_cnt) {
+ c->lpt_hght += 1;
+ n <<= UBIFS_LPT_FANOUT_SHIFT;
+ }
+
+ c->space_bits = fls(c->leb_size) - 3;
+ c->lpt_lnum_bits = fls(c->lpt_lebs);
+ c->lpt_offs_bits = fls(c->leb_size - 1);
+ c->lpt_spc_bits = fls(c->leb_size);
+
+ n = (c->max_leb_cnt + UBIFS_LPT_FANOUT - 1) / UBIFS_LPT_FANOUT;
+ c->pcnt_bits = fls(n - 1);
+
+ c->lnum_bits = fls(c->max_leb_cnt - 1);
+
+ bits = UBIFS_LPT_CRC_BITS + UBIFS_LPT_TYPE_BITS +
+ (c->big_lpt ? c->pcnt_bits : 0) +
+ (c->space_bits * 2 + 1) * UBIFS_LPT_FANOUT;
+ c->pnode_sz = (bits + 7) / 8;
+
+ bits = UBIFS_LPT_CRC_BITS + UBIFS_LPT_TYPE_BITS +
+ (c->big_lpt ? c->pcnt_bits : 0) +
+ (c->lpt_lnum_bits + c->lpt_offs_bits) * UBIFS_LPT_FANOUT;
+ c->nnode_sz = (bits + 7) / 8;
+
+ bits = UBIFS_LPT_CRC_BITS + UBIFS_LPT_TYPE_BITS +
+ c->lpt_lebs * c->lpt_spc_bits * 2;
+ c->ltab_sz = (bits + 7) / 8;
+
+ bits = UBIFS_LPT_CRC_BITS + UBIFS_LPT_TYPE_BITS +
+ c->lnum_bits * c->lsave_cnt;
+ c->lsave_sz = (bits + 7) / 8;
+
+ /* Calculate the minimum LPT size */
+ c->lpt_sz = (long long)c->pnode_cnt * c->pnode_sz;
+ c->lpt_sz += (long long)c->nnode_cnt * c->nnode_sz;
+ c->lpt_sz += c->ltab_sz;
+ c->lpt_sz += c->lsave_sz;
+
+ /* Add wastage */
+ sz = c->lpt_sz;
+ per_leb_wastage = max_t(int, c->pnode_sz, c->nnode_sz);
+ sz += per_leb_wastage;
+ tot_wastage = per_leb_wastage;
+ while (sz > c->leb_size) {
+ sz += per_leb_wastage;
+ sz -= c->leb_size;
+ tot_wastage += per_leb_wastage;
+ }
+ tot_wastage += ALIGN(sz, c->min_io_size) - sz;
+ c->lpt_sz += tot_wastage;
+}
+
+/**
+ * calc_dflt_lpt_geom - calculate default LPT geometry.
+ * @c: the UBIFS file-system description object
+ * @main_lebs: number of main area LEBs is passed and returned here
+ * @big_lpt: whether the LPT area is "big" is returned here
+ *
+ * The size of the LPT area depends on parameters that themselves are dependent
+ * on the size of the LPT area. This function, successively recalculates the LPT
+ * area geometry until the parameters and resultant geometry are consistent.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int calc_dflt_lpt_geom(struct ubifs_info *c, int *main_lebs, int *big_lpt)
+{
+ int i, lebs_needed;
+ uint64_t sz;
+
+ /* Start by assuming the minimum number of LPT LEBs */
+ c->lpt_lebs = UBIFS_MIN_LPT_LEBS;
+ c->main_lebs = *main_lebs - c->lpt_lebs;
+ if (c->main_lebs <= 0)
+ return -EINVAL;
+
+ /* And assume we will use the small LPT model */
+ c->big_lpt = 0;
+
+ /*
+ * Calculate the geometry based on assumptions above and then see if it
+ * makes sense
+ */
+ do_calc_lpt_geom(c);
+
+ /* Small LPT model must have lpt_sz < leb_size */
+ if (c->lpt_sz > c->leb_size) {
+ /* Nope, so try again using big LPT model */
+ c->big_lpt = 1;
+ do_calc_lpt_geom(c);
+ }
+
+ /* Now check there are enough LPT LEBs */
+ for (i = 0; i < 64 ; i++) {
+ sz = c->lpt_sz * 4; /* Allow 4 times the size */
+ sz += c->leb_size - 1;
+ do_div(sz, c->leb_size);
+ lebs_needed = sz;
+ if (lebs_needed > c->lpt_lebs) {
+ /* Not enough LPT LEBs so try again with more */
+ c->lpt_lebs = lebs_needed;
+ c->main_lebs = *main_lebs - c->lpt_lebs;
+ if (c->main_lebs <= 0)
+ return -EINVAL;
+ do_calc_lpt_geom(c);
+ continue;
+ }
+ if (c->ltab_sz > c->leb_size) {
+ err_msg("LPT ltab too big");
+ return -EINVAL;
+ }
+ *main_lebs = c->main_lebs;
+ *big_lpt = c->big_lpt;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+int init_compression(void)
+{
+ lzo_mem = malloc(LZO1X_MEM_COMPRESS);
+ if (!lzo_mem)
+ return -1;
+
+ return 0;
+}
+
+/**
+ * init - initialize things.
+ */
+static int init(void)
+{
+ int err, i, main_lebs, big_lpt = 0;
+
+ c->highest_inum = UBIFS_FIRST_INO;
+
+ c->jhead_cnt = 1;
+
+ main_lebs = c->max_leb_cnt - UBIFS_SB_LEBS - UBIFS_MST_LEBS;
+ main_lebs -= c->log_lebs + c->orph_lebs;
+
+ err = calc_dflt_lpt_geom(c, &main_lebs, &big_lpt);
+ if (err)
+ return err;
+
+ c->main_first = UBIFS_LOG_LNUM + c->log_lebs + c->lpt_lebs +
+ c->orph_lebs;
+ head_lnum = c->main_first;
+ head_offs = 0;
+
+ c->lpt_first = UBIFS_LOG_LNUM + c->log_lebs;
+ c->lpt_last = c->lpt_first + c->lpt_lebs - 1;
+
+ c->lpt = malloc(c->main_lebs * sizeof(struct ubifs_lprops));
+ if (!c->lpt)
+ return err_msg("unable to allocate LPT");
+
+ c->ltab = malloc(c->lpt_lebs * sizeof(struct ubifs_lprops));
+ if (!c->ltab)
+ return err_msg("unable to allocate LPT ltab");
+
+ /* Initialize LPT's own lprops */
+ for (i = 0; i < c->lpt_lebs; i++) {
+ c->ltab[i].free = c->leb_size;
+ c->ltab[i].dirty = 0;
+ }
+
+ c->dead_wm = ALIGN(MIN_WRITE_SZ, c->min_io_size);
+ c->dark_wm = ALIGN(UBIFS_MAX_NODE_SZ, c->min_io_size);
+ dbg_msg("dead_wm %d dark_wm %d", c->dead_wm, c->dark_wm);
+
+ leb_buf = malloc(c->leb_size);
+ if (!leb_buf)
+ return err_msg("out of memory");
+
+ node_buf = malloc(NODE_BUFFER_SIZE);
+ if (!node_buf)
+ return err_msg("out of memory");
+
+ block_buf = malloc(UBIFS_BLOCK_SIZE);
+ if (!block_buf)
+ return err_msg("out of memory");
+
+ err = init_compression();
+ if (err)
+ return err;
+
+ modem_buf = malloc(MODEM_IMAGE_SIZE);
+ if (!modem_buf)
+ return err_msg("out of memory");
+
+ return 0;
+}
+
+/**
+ * deinit - deinitialize things.
+ */
+static void deinit(void)
+{
+ free(c->lpt);
+ free(c->ltab);
+ free(leb_buf);
+ free(node_buf);
+ free(block_buf);
+ free(lzo_mem);
+}
+
+/**
+ * mkfs - make the file system.
+ *
+ * Each on-flash area has a corresponding function to create it. The order of
+ * the functions reflects what information must be known to complete each stage.
+ * As a consequence the output file is not written sequentially. No effort has
+ * been made to make efficient use of memory or to allow for the possibility of
+ * incremental updates to the output file.
+ */
+int mkfs(void *src_addr, unsigned long src_size,
+ void **dest_addr, unsigned long *dest_size,
+ int min_io_size, int leb_size, int max_leb_cnt)
+{
+ int err = 0;
+ ino_t inum;
+ ino_t dir_inum = UBIFS_ROOT_INO;
+ unsigned char type = UBIFS_ITYPE_REG;
+ char *name = "modem.bin";
+ unsigned long root_dir_size = UBIFS_INO_NODE_SZ;
+
+ err = set_options(min_io_size, leb_size, max_leb_cnt);
+ if (err)
+ return err;
+
+ err = init();
+ if (err)
+ goto out;
+
+ c->highest_inum++;
+ inum = c->highest_inum;
+ creat_sqnum = c->max_sqnum++;
+
+ err = add_data_node(src_size, src_addr, inum);
+ if (err)
+ goto out;
+
+ err = add_inode(src_size, inum);
+ if (err)
+ goto out;
+
+ err = add_dent_node(dir_inum, name, inum, type);
+ if (err)
+ goto out;
+
+ root_dir_size += ALIGN(UBIFS_DENT_NODE_SZ + strlen(name) + 1, 8);
+
+ err = add_inode(root_dir_size, dir_inum);
+ if (err)
+ goto out;
+
+ err = flush_nodes();
+ if (err)
+ goto out;
+
+ err = set_gc_lnum();
+ if (err)
+ goto out;
+
+ err = write_index();
+ if (err)
+ goto out;
+
+ err = finalize_leb_cnt();
+ if (err)
+ goto out;
+
+ err = write_lpt();
+ if (err)
+ goto out;
+
+ err = write_super();
+ if (err)
+ goto out;
+
+ err = write_master();
+ if (err)
+ goto out;
+
+ err = write_log();
+ if (err)
+ goto out;
+
+ err = write_orphan_area();
+
+ *dest_addr = modem_buf;
+ *dest_size = (unsigned long) c->leb_cnt * c->leb_size;
+
+ printf("ubifs image offset : 0x%x\n", (unsigned int) dest_addr);
+ printf("ubifs image size : 0x%lx\n", *dest_size);
+
+out:
+ deinit();
+ return err;
+}
projects / kernel / u-boot.git / commitdiff