return do_fat_read(filename, buffer, maxsize, LS_NO);
}
-#ifdef CONFIG_FAT_WRITE
-static void uppercase (char *str, int len)
-{
- int i;
-
- for (i = 0; i < len; i++) {
- TOUPPER(*str);
- str++;
- }
-}
-
-static int total_sector;
-static int disk_write (__u32 startblock, __u32 getsize, __u8 * bufptr)
-{
- if (cur_dev == NULL)
- return -1;
-
- if (startblock + getsize > total_sector) {
- printf("error: overflow occurs\n");
- return -1;
- }
-
- startblock += part_offset;
-
- if (cur_dev->block_read) {
- return cur_dev->block_write(cur_dev->dev, startblock, getsize,
- (unsigned long *) bufptr);
- }
- return -1;
-}
-
-/*
- * Set short name in directory entry
- */
-static void set_name (dir_entry *dirent, const char *filename)
-{
- char s_name[256];
- char *period;
- int period_location, len, i, ext_num;
-
- if (filename == NULL)
- return;
-
- len = strlen(filename);
- if (len == 0)
- return;
-
- memcpy(s_name, filename, len);
- uppercase(s_name, len);
-
- period = strchr(s_name, '.');
- if (period == NULL) {
- period_location = len - 1;
- ext_num = 0;
- } else {
- period_location = period - s_name;
- ext_num = len - period_location - 1;
- }
-
- /* Pad spaces when file name length is shortter than eight */
- if (period_location < 8) {
- memcpy(dirent->name, s_name, period_location);
- for (i = period_location; i < 8; i++)
- dirent->name[i] = ' ';
- } else if (period_location == 8) {
- memcpy(dirent->name, s_name, period_location);
- } else {
- memcpy(dirent->name, s_name, 6);
- dirent->name[6] = '~';
- dirent->name[7] = '1';
- }
-
- if (ext_num < 3) {
- memcpy(dirent->ext, s_name + period_location + 1, ext_num);
- for (i = ext_num; i < 3; i++)
- dirent->name[i] = ' ';
- } else
- memcpy(dirent->ext, s_name + period_location + 1, 3);
-
- debug("name : %s\n", dirent->name);
- debug("ext : %s\n", dirent->ext);
-}
-
-/*
- * Write fat buffer into block device
- */
-static int flush_fat_buffer(fsdata *mydata)
-{
- int getsize = FATBUFSIZE / FS_BLOCK_SIZE;
- __u32 fatlength = mydata->fatlength;
- __u8 *bufptr = mydata->fatbuf;
- __u32 startblock = mydata->fatbufnum * FATBUFBLOCKS;
-
- fatlength *= SECTOR_SIZE;
- startblock += mydata->fat_sect;
-
- if (getsize > fatlength)
- getsize = fatlength;
-
- /* Write FAT buf */
- if (disk_write(startblock, getsize, bufptr) < 0) {
- debug("error: writing FAT blocks\n");
- return -1;
- }
-
- return 0;
-}
-
-#ifdef CONFIG_SUPPORT_VFAT
-/*
- * Set the file name information from 'name' into 'slot',
- */
-static int str2slot (dir_slot *slotptr, const char *name, int *idx)
-{
- int j, end_idx = 0;
-
- for (j = 0; j <= 8; j += 2) {
- if (name[*idx] == 0x00) {
- slotptr->name0_4[j] = 0;
- slotptr->name0_4[j + 1] = 0;
- end_idx++;
- goto name0_4;
- }
- slotptr->name0_4[j] = name[*idx];
- (*idx)++;
- end_idx++;
- }
- for (j = 0; j <= 10; j += 2) {
- if (name[*idx] == 0x00) {
- slotptr->name5_10[j] = 0;
- slotptr->name5_10[j + 1] = 0;
- end_idx++;
- goto name5_10;
- }
- slotptr->name5_10[j] = name[*idx];
- (*idx)++;
- end_idx++;
- }
- for (j = 0; j <= 2; j += 2) {
- if (name[*idx] == 0x00) {
- slotptr->name11_12[j] = 0;
- slotptr->name11_12[j + 1] = 0;
- end_idx++;
- goto name11_12;
- }
- slotptr->name11_12[j] = name[*idx];
- (*idx)++;
- end_idx++;
- }
-
- if (name[*idx] == 0x00)
- return 1;
-
- return 0;
-/* Not used characters are filled with 0xff 0xff */
-name0_4:
- for (; end_idx < 5; end_idx++) {
- slotptr->name0_4[end_idx * 2] = 0xff;
- slotptr->name0_4[end_idx * 2 + 1] = 0xff;
- }
- end_idx = 5;
-name5_10:
- end_idx -= 5;
- for (; end_idx < 6; end_idx++) {
- slotptr->name5_10[end_idx * 2] = 0xff;
- slotptr->name5_10[end_idx * 2 + 1] = 0xff;
- }
- end_idx = 11;
-name11_12:
- end_idx -= 11;
- for (; end_idx < 2; end_idx++) {
- slotptr->name11_12[end_idx * 2] = 0xff;
- slotptr->name11_12[end_idx * 2 + 1] = 0xff;
- }
-
- return 1;
-}
-
-/*
- * Fill dir_slot entries with appropriate name, id, and attr
- * The real directory entry is returned by dentptr
- */
-static void
-fill_dir_slot (dir_entry **dentptr, const char *l_name)
-{
- dir_slot *slotptr = (dir_slot *)get_vfatname_block;
- __u8 counter;
- int idx = 0, ret;
-
- do {
- memset(slotptr, 0x00, sizeof(dir_slot));
- ret = str2slot(slotptr, l_name, &idx);
- slotptr->id = ++counter;
- slotptr->attr = ATTR_VFAT;
- slotptr++;
- } while (ret == 0);
-
- slotptr--;
- slotptr->id |= LAST_LONG_ENTRY_MASK;
-
- while (counter >= 1) {
- memcpy(*dentptr, slotptr, sizeof(dir_slot));
- (*dentptr)++;
- slotptr--;
- counter--;
- }
-}
-
-/*
- * Fill alias_checksum in dir_slot with calculated checksum value
- */
-static void fill_alias_checksum(dir_slot *slotptr, char *name)
-{
- int i;
- __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
-
- for (i = 0; i < counter; i++, slotptr++)
- slotptr->alias_checksum = mkcksum(name);
-}
-
-static int
-get_long_file_name (fsdata *mydata, int curclust, __u8 *cluster,
- dir_entry **retdent, char *l_name)
-{
- dir_entry *realdent;
- dir_slot *slotptr = (dir_slot *)(*retdent);
- __u8 *nextclust = cluster + mydata->clust_size * SECTOR_SIZE;
- __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
- int idx = 0;
-
- while ((__u8 *)slotptr < nextclust) {
- if (counter == 0)
- break;
- if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter)
- return -1;
- slotptr++;
- counter--;
- }
-
- if ((__u8 *)slotptr >= nextclust) {
- dir_slot *slotptr2;
-
- slotptr--;
- curclust = get_fatent(mydata, curclust);
- if (CHECK_CLUST(curclust, mydata->fatsize)) {
- debug("curclust: 0x%x\n", curclust);
- printf("Invalid FAT entry\n");
- return -1;
- }
-
- if (get_cluster(mydata, curclust, get_vfatname_block,
- mydata->clust_size * SECTOR_SIZE) != 0) {
- debug("Error: reading directory block\n");
- return -1;
- }
-
- slotptr2 = (dir_slot *)get_vfatname_block;
- while (slotptr2->id > 0x01)
- slotptr2++;
-
- /* Save the real directory entry */
- realdent = (dir_entry *)slotptr2 + 1;
- while ((__u8 *)slotptr2 >= get_vfatname_block) {
- slot2str(slotptr2, l_name, &idx);
- slotptr2--;
- }
- } else {
- /* Save the real directory entry */
- realdent = (dir_entry *)slotptr;
- }
-
- do {
- slotptr--;
- if (slot2str(slotptr, l_name, &idx))
- break;
- } while (!(slotptr->id & LAST_LONG_ENTRY_MASK));
-
- l_name[idx] = '\0';
- if (*l_name == DELETED_FLAG)
- *l_name = '\0';
- else if (*l_name == aRING)
- *l_name = DELETED_FLAG;
- downcase(l_name);
-
- /* Return the real directory entry */
- *retdent = realdent;
-
- return 0;
-}
-
-#endif
-/*
- * Set the entry at index 'entry' in a FAT (16/32) table.
- */
-static int set_fatent_value (fsdata *mydata, __u32 entry, __u32 entry_value)
-{
- __u32 bufnum, offset;
-
- switch (mydata->fatsize) {
- case 32:
- bufnum = entry / FAT32BUFSIZE;
- offset = entry - bufnum * FAT32BUFSIZE;
- break;
- case 16:
- bufnum = entry / FAT16BUFSIZE;
- offset = entry - bufnum * FAT16BUFSIZE;
- break;
- default:
- /* Unsupported FAT size */
- return -1;
- }
-
- /* Read a new block of FAT entries into the cache. */
- if (bufnum != mydata->fatbufnum) {
- int getsize = FATBUFSIZE / FS_BLOCK_SIZE;
- __u8 *bufptr = mydata->fatbuf;
- __u32 fatlength = mydata->fatlength;
- __u32 startblock = bufnum * FATBUFBLOCKS;
-
- fatlength *= SECTOR_SIZE;
- startblock += mydata->fat_sect;
-
- if (getsize > fatlength)
- getsize = fatlength;
-
- if (mydata->fatbufnum != -1) {
- if (flush_fat_buffer(mydata) < 0)
- return -1;
- }
-
- if (disk_read(startblock, getsize, bufptr) < 0) {
- debug("Error reading FAT blocks\n");
- return -1;
- }
- mydata->fatbufnum = bufnum;
- }
-
- /* Set the actual entry */
- switch (mydata->fatsize) {
- case 32:
- ((__u32 *) mydata->fatbuf)[offset] = cpu_to_le32(entry_value);
- break;
- case 16:
- ((__u32 *) mydata->fatbuf)[offset] = cpu_to_le16(entry_value);
- break;
- default:
- return -1;
- }
-
- return 0;
-}
-
-static int writeback_fatbuf(fsdata *mydata, __u32 entry)
-{
- __u32 bufnum, offset;
- int getsize = FATBUFSIZE / FS_BLOCK_SIZE;
- __u8 *bufptr = mydata->fatbuf;
- __u32 fatlength = mydata->fatlength;
- __u32 startblock = bufnum * FATBUFBLOCKS;
-
- switch (mydata->fatsize) {
- case 32:
- bufnum = entry / FAT32BUFSIZE;
- offset = entry - bufnum * FAT32BUFSIZE;
- break;
- case 16:
- bufnum = entry / FAT16BUFSIZE;
- offset = entry - bufnum * FAT16BUFSIZE;
- break;
- default:
- /* Unsupported FAT size */
- return -1;
- }
-
- /* Read a new block of FAT entries into the cache. */
- if (bufnum != mydata->fatbufnum) {
- fatlength *= SECTOR_SIZE;
- startblock += mydata->fat_sect;
-
- if (getsize > fatlength)
- getsize = fatlength;
-
- if (mydata->fatbufnum != -1) {
- if (flush_fat_buffer(mydata) < 0)
- return -1;
- }
- debug("bufnum : %d, offset : %d\n", bufnum, offset);
- }
-
- return 0;
-}
-
-/*
- * Determine the entry value at index 'entry' in a FAT (16/32) table
- */
-static __u32 determine_fatent (fsdata *mydata, __u32 entry)
-{
- __u32 next_fat, next_entry = entry + 1;
-
- while (1) {
- writeback_fatbuf(mydata, next_entry);
- next_fat = get_fatent(mydata, next_entry);
- if (next_fat == 0) {
- set_fatent_value(mydata, entry, next_entry);
- break;
- }
- next_entry++;
- }
- debug("FAT%d: entry: %08x, entry_value: %04x\n",
- mydata->fatsize, entry, next_entry);
-
- return next_entry;
-}
-
-/*
- * Write at most 'size' bytes from 'buffer' into the specified cluster.
- * Return 0 on success, -1 otherwise.
- */
-static int
-set_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer,
- unsigned long size)
-{
- int idx = 0;
- __u32 startsect;
-
- if (clustnum > 0) {
- startsect = mydata->data_begin +
- clustnum * mydata->clust_size;
- } else {
- startsect = mydata->rootdir_sect;
- }
-
- debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect);
-
- if (disk_write(startsect, size / FS_BLOCK_SIZE, buffer) < 0) {
- debug("Error writing data\n");
- return -1;
- }
-
- if (size % FS_BLOCK_SIZE) {
- __u8 tmpbuf[FS_BLOCK_SIZE];
-
- memcpy(tmpbuf, buffer, size % FS_BLOCK_SIZE);
- idx = size / FS_BLOCK_SIZE;
-
- if (disk_write(startsect + idx, 1, tmpbuf) < 0) {
- debug("Error writing data\n");
- return -1;
- }
-
- return 0;
- }
-
- return 0;
-}
-
-/*
- * Find the first empty cluster starting from cluster #2
- */
-static int find_empty_cluster(fsdata *mydata)
-{
- __u32 fat_val, entry = 3;
-
- while (1) {
- fat_val = get_fatent(mydata, entry);
- if (fat_val == 0)
- break;
- entry++;
- }
-
- return entry;
-}
-
-/*
- * Set empty cluster from 'entry' to the end of a file
- */
-static int clear_fatent(fsdata *mydata, __u32 entry)
-{
- __u32 fat_val, initial_fatbufnum = 0;
-
- while (1) {
- fat_val = get_fatent(mydata, entry);
- if (fat_val != 0)
- set_fatent_value(mydata, entry, 0);
-
- if (fat_val == 0xfffffff || fat_val == 0xffff)
- break;
-
- writeback_fatbuf(mydata, fat_val);
- entry = fat_val;
- }
-
- /* Flush fat buffer */
- if (flush_fat_buffer(mydata) < 0)
- return -1;
-
- mydata->fatbufnum = initial_fatbufnum;
-
- return 0;
-}
-
-/*
- * Write at most 'maxsize' bytes from 'buffer' into
- * the file associated with 'dentptr'
- * Return the number of bytes read or -1 on fatal errors.
- */
-static int
-set_contents (fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
- unsigned long maxsize)
-{
- unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
- unsigned int bytesperclust = mydata->clust_size * SECTOR_SIZE;
- __u32 curclust = START(dentptr);
- __u32 endclust, newclust;
- unsigned long actsize;
-
- debug("Filesize: %ld bytes\n", filesize);
-
- if (maxsize > 0 && filesize > maxsize)
- filesize = maxsize;
-
- debug("%ld bytes\n", filesize);
-
- actsize = bytesperclust;
- endclust = curclust;
- do {
- /* search for consecutive clusters */
- while (actsize < filesize) {
- newclust = determine_fatent(mydata, endclust);
-
- if ((newclust - 1) != endclust)
- goto getit;
-
- if (CHECK_CLUST(newclust, mydata->fatsize)) {
- debug("curclust: 0x%x\n", newclust);
- debug("Invalid FAT entry\n");
- return gotsize;
- }
- endclust = newclust;
- actsize += bytesperclust;
- }
- /* actsize >= file size */
- actsize -= bytesperclust;
- /* set remaining clusters */
- if (set_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
- debug("error: writing cluster\n");
- return -1;
- }
-
- /* set remaining bytes */
- gotsize += (int)actsize;
- filesize -= actsize;
- buffer += actsize;
- actsize = filesize;
-
- if (set_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
- debug("error: writing cluster\n");
- return -1;
- }
- gotsize += actsize;
-
- /* Mark end of file in FAT */
- if (mydata->fatsize == 16)
- newclust = 0xffff;
- else if (mydata->fatsize == 32)
- newclust = 0xfffffff;
- set_fatent_value(mydata, endclust, newclust);
-
- return gotsize;
-getit:
- if (set_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
- debug("error: writing cluster\n");
- return -1;
- }
- gotsize += (int)actsize;
- filesize -= actsize;
- buffer += actsize;
-
- if (CHECK_CLUST(curclust, mydata->fatsize)) {
- debug("curclust: 0x%x\n", curclust);
- debug("Invalid FAT entry\n");
- return gotsize;
- }
- actsize = bytesperclust;
- curclust = endclust = newclust;
- } while (1);
-}
-
-/*
- * Fill dir_entry entry
- */
-static void fill_dentry (fsdata *mydata, dir_entry *dentptr,
- const char *filename, __u32 start_cluster, __u32 size, __u8 attr)
-{
- if (mydata->fatsize == 32)
- dentptr->starthi = cpu_to_le16(start_cluster & 0xffff0000);
- dentptr->start = cpu_to_le16(start_cluster & 0xffff);
- dentptr->size = cpu_to_le32(size);
-
- dentptr->attr = attr;
-
- set_name(dentptr, filename);
-}
-
-/*
- * Check whether adding a file makes the file system to
- * exceed the size of the block device
- * Return 1 when overflow occurs, otherwise return 0
- */
-static int check_overflow(fsdata *mydata, __u32 clustnum, unsigned long size)
-{
- __u32 startsect, sect_num;
-
- if (clustnum > 0) {
- startsect = mydata->data_begin +
- clustnum * mydata->clust_size;
- } else {
- startsect = mydata->rootdir_sect;
- }
-
- sect_num = size / FS_BLOCK_SIZE;
- if (size % FS_BLOCK_SIZE)
- sect_num++;
-
- if (startsect + sect_num > total_sector)
- return 1;
-
- return 0;
-}
-
-static dir_entry *empty_dentptr = NULL;
-
-static dir_entry *find_directory_entry (fsdata *mydata, int startsect,
- char *filename, dir_entry *retdent)
-{
- __u16 prevcksum = 0xffff;
- __u32 curclust = startsect;
- int files = 0, dirs = 0;
-
- debug("get_dentfromdir: %s\n", filename);
-
- while (1) {
- dir_entry *dentptr;
-
- int i;
-
- if (disk_read(curclust, mydata->clust_size,
- get_dentfromdir_block) < 0) {
- printf("Error: reading directory block\n");
- return NULL;
- }
-
- dentptr = (dir_entry *)get_dentfromdir_block;
-
- for (i = 0; i < DIRENTSPERCLUST; i++) {
- char s_name[14], l_name[256];
-
- l_name[0] = '\0';
- if (dentptr->name[0] == DELETED_FLAG) {
- dentptr++;
- continue;
- }
- if ((dentptr->attr & ATTR_VOLUME)) {
-#ifdef CONFIG_SUPPORT_VFAT
- if ((dentptr->attr & ATTR_VFAT) &&
- (dentptr-> name[0] & LAST_LONG_ENTRY_MASK)) {
- prevcksum = ((dir_slot *)dentptr)->alias_checksum;
- get_long_file_name(mydata, curclust,
- get_dentfromdir_block,
- &dentptr, l_name);
- debug("vfatname: |%s|\n", l_name);
- } else
-#endif
- {
- /* Volume label or VFAT entry */
- dentptr++;
- continue;
- }
- }
- if (dentptr->name[0] == 0) {
- debug("Dentname == NULL - %d\n", i);
- empty_dentptr = dentptr;
- return NULL;
- }
-
- get_name(dentptr, s_name);
-
- if (strcmp(filename, s_name)
- && strcmp(filename, l_name)) {
- debug("Mismatch: |%s|%s|\n", s_name, l_name);
- dentptr++;
- continue;
- }
-
- memcpy(retdent, dentptr, sizeof(dir_entry));
-
- debug("DentName: %s", s_name);
- debug(", start: 0x%x", START(dentptr));
- debug(", size: 0x%x %s\n",
- FAT2CPU32(dentptr->size),
- (dentptr->attr & ATTR_DIR) ? "(DIR)" : "");
-
- return dentptr;
- }
-
- curclust = get_fatent(mydata, curclust);
- if (CHECK_CLUST(curclust, mydata->fatsize)) {
- debug("curclust: 0x%x\n", curclust);
- printf("Invalid FAT entry\n");
- return NULL;
- }
- }
-
- return NULL;
-}
-
-static int do_fat_write (const char *filename, void *buffer,
- unsigned long size)
-{
- dir_entry *dentptr, *retdent;
- dir_slot *slotptr;
- __u32 startsect;
- __u32 start_cluster;
- boot_sector bs;
- volume_info volinfo;
- fsdata datablock;
- fsdata *mydata = &datablock;
- int cursect;
- int root_cluster, ret, name_len;
- char l_filename[256];
-
- if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
- debug("error: reading boot sector\n");
- return 0;
- }
-
- total_sector = bs.total_sect;
- if (total_sector == 0) {
- total_sector = next_part_offset - part_offset;
- }
-
- root_cluster = bs.root_cluster;
-
- if (mydata->fatsize == 32)
- mydata->fatlength = bs.fat32_length;
- else
- mydata->fatlength = bs.fat_length;
-
- mydata->fat_sect = bs.reserved;
-
- cursect = mydata->rootdir_sect
- = mydata->fat_sect + mydata->fatlength * bs.fats;
-
- mydata->clust_size = bs.cluster_size;
-
- if (mydata->fatsize == 32) {
- mydata->data_begin = mydata->rootdir_sect -
- (mydata->clust_size * 2);
- } else {
- int rootdir_size;
-
- rootdir_size = ((bs.dir_entries[1] * (int)256 +
- bs.dir_entries[0]) *
- sizeof(dir_entry)) /
- SECTOR_SIZE;
- mydata->data_begin = mydata->rootdir_sect +
- rootdir_size -
- (mydata->clust_size * 2);
- }
-
- mydata->fatbufnum = -1;
- startsect = mydata->rootdir_sect;
-
- if (disk_read(cursect, mydata->clust_size, do_fat_read_block) < 0) {
- printf("error: reading rootdir block\n");
- return -1;
- }
- dentptr = (dir_entry *) do_fat_read_block;
-
- name_len = strlen(filename);
- memcpy(l_filename, filename, name_len);
- downcase(l_filename);
- retdent = find_directory_entry(mydata, startsect,
- l_filename, dentptr);
- if (retdent) {
- /* Update file size and start_cluster in a directory entry */
- retdent->size = cpu_to_le32(size);
- start_cluster = FAT2CPU16(retdent->start);
- if (mydata->fatsize == 32)
- start_cluster |=
- (FAT2CPU16(retdent->starthi) << 16);
-
- ret = check_overflow(mydata, start_cluster, size);
- if (ret) {
- printf("error: %ld overflow\n", size);
- return 0;
- }
-
- ret = clear_fatent(mydata, start_cluster);
- if (ret < 0) {
- printf("error: clearing FAT entries\n");
- return 0;
- }
-
- ret = set_contents(mydata, retdent, buffer, size);
- if (ret < 0) {
- printf("error: writing contents\n");
- return 0;
- }
-
- /* Flush fat buffer */
- if (flush_fat_buffer(mydata) < 0)
- return 0;
-
- /* Write directory table to device */
- if (disk_write(cursect, mydata->clust_size, get_dentfromdir_block) < 0) {
- printf("error: wrinting directory entry\n");
- return 0;
- }
- } else {
- ret = start_cluster = find_empty_cluster(mydata);
- if (ret < 0) {
- printf("error: finding empty cluster\n");
- return 0;
- }
-
- ret = check_overflow(mydata, start_cluster, size);
- if (ret) {
- printf("error: %ld overflow\n", size);
- return 0;
- }
-
- slotptr = (dir_slot *)empty_dentptr;
- fill_dir_slot(&empty_dentptr, filename);
-
- /* Set attribute as archieve for regular file */
- fill_dentry(mydata, empty_dentptr, filename,
- start_cluster, size, 0x20);
-
- fill_alias_checksum(slotptr, empty_dentptr->name);
-
- ret = set_contents(mydata, empty_dentptr, buffer, size);
- if (ret < 0) {
- printf("error: writing contents\n");
- return 0;
- }
-
- /* Flush fat buffer */
- if (flush_fat_buffer(mydata) < 0)
- return 0;
-
- /* Write directory table to device */
- if (disk_write(cursect, mydata->clust_size, get_dentfromdir_block) < 0) {
- printf("error: writing directory entry\n");
- return 0;
- }
- }
-
- return 0;
-}
-
-int file_fat_write (const char *filename, void *buffer, unsigned long maxsize)
-{
- printf("writing %s\n", filename);
- return do_fat_write(filename, buffer, maxsize);
-}
-#endif
--- /dev/null
+/*
+ * fat_write.c
+ *
+ * R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg
+ *
+ * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
+ * 2003-03-10 - kharris@nexus-tech.net - ported to uboot
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <config.h>
+#include <fat.h>
+#include <asm/byteorder.h>
+#include <part.h>
+#include "fat.c"
+
+static void uppercase (char *str, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++) {
+ TOUPPER(*str);
+ str++;
+ }
+}
+
+static int total_sector;
+static int disk_write (__u32 startblock, __u32 getsize, __u8 * bufptr)
+{
+ if (cur_dev == NULL)
+ return -1;
+
+ if (startblock + getsize > total_sector) {
+ printf("error: overflow occurs\n");
+ return -1;
+ }
+
+ startblock += part_offset;
+
+ if (cur_dev->block_read) {
+ return cur_dev->block_write(cur_dev->dev, startblock, getsize,
+ (unsigned long *) bufptr);
+ }
+ return -1;
+}
+
+/*
+ * Set short name in directory entry
+ */
+static void set_name (dir_entry *dirent, const char *filename)
+{
+ char s_name[256];
+ char *period;
+ int period_location, len, i, ext_num;
+
+ if (filename == NULL)
+ return;
+
+ len = strlen(filename);
+ if (len == 0)
+ return;
+
+ memcpy(s_name, filename, len);
+ uppercase(s_name, len);
+
+ period = strchr(s_name, '.');
+ if (period == NULL) {
+ period_location = len - 1;
+ ext_num = 0;
+ } else {
+ period_location = period - s_name;
+ ext_num = len - period_location - 1;
+ }
+
+ /* Pad spaces when file name length is shortter than eight */
+ if (period_location < 8) {
+ memcpy(dirent->name, s_name, period_location);
+ for (i = period_location; i < 8; i++)
+ dirent->name[i] = ' ';
+ } else if (period_location == 8) {
+ memcpy(dirent->name, s_name, period_location);
+ } else {
+ memcpy(dirent->name, s_name, 6);
+ dirent->name[6] = '~';
+ dirent->name[7] = '1';
+ }
+
+ if (ext_num < 3) {
+ memcpy(dirent->ext, s_name + period_location + 1, ext_num);
+ for (i = ext_num; i < 3; i++)
+ dirent->name[i] = ' ';
+ } else
+ memcpy(dirent->ext, s_name + period_location + 1, 3);
+
+ debug("name : %s\n", dirent->name);
+ debug("ext : %s\n", dirent->ext);
+}
+
+/*
+ * Write fat buffer into block device
+ */
+static int flush_fat_buffer(fsdata *mydata)
+{
+ int getsize = FATBUFSIZE / FS_BLOCK_SIZE;
+ __u32 fatlength = mydata->fatlength;
+ __u8 *bufptr = mydata->fatbuf;
+ __u32 startblock = mydata->fatbufnum * FATBUFBLOCKS;
+
+ fatlength *= SECTOR_SIZE;
+ startblock += mydata->fat_sect;
+
+ if (getsize > fatlength)
+ getsize = fatlength;
+
+ /* Write FAT buf */
+ if (disk_write(startblock, getsize, bufptr) < 0) {
+ debug("error: writing FAT blocks\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_SUPPORT_VFAT
+/*
+ * Set the file name information from 'name' into 'slot',
+ */
+static int str2slot (dir_slot *slotptr, const char *name, int *idx)
+{
+ int j, end_idx = 0;
+
+ for (j = 0; j <= 8; j += 2) {
+ if (name[*idx] == 0x00) {
+ slotptr->name0_4[j] = 0;
+ slotptr->name0_4[j + 1] = 0;
+ end_idx++;
+ goto name0_4;
+ }
+ slotptr->name0_4[j] = name[*idx];
+ (*idx)++;
+ end_idx++;
+ }
+ for (j = 0; j <= 10; j += 2) {
+ if (name[*idx] == 0x00) {
+ slotptr->name5_10[j] = 0;
+ slotptr->name5_10[j + 1] = 0;
+ end_idx++;
+ goto name5_10;
+ }
+ slotptr->name5_10[j] = name[*idx];
+ (*idx)++;
+ end_idx++;
+ }
+ for (j = 0; j <= 2; j += 2) {
+ if (name[*idx] == 0x00) {
+ slotptr->name11_12[j] = 0;
+ slotptr->name11_12[j + 1] = 0;
+ end_idx++;
+ goto name11_12;
+ }
+ slotptr->name11_12[j] = name[*idx];
+ (*idx)++;
+ end_idx++;
+ }
+
+ if (name[*idx] == 0x00)
+ return 1;
+
+ return 0;
+/* Not used characters are filled with 0xff 0xff */
+name0_4:
+ for (; end_idx < 5; end_idx++) {
+ slotptr->name0_4[end_idx * 2] = 0xff;
+ slotptr->name0_4[end_idx * 2 + 1] = 0xff;
+ }
+ end_idx = 5;
+name5_10:
+ end_idx -= 5;
+ for (; end_idx < 6; end_idx++) {
+ slotptr->name5_10[end_idx * 2] = 0xff;
+ slotptr->name5_10[end_idx * 2 + 1] = 0xff;
+ }
+ end_idx = 11;
+name11_12:
+ end_idx -= 11;
+ for (; end_idx < 2; end_idx++) {
+ slotptr->name11_12[end_idx * 2] = 0xff;
+ slotptr->name11_12[end_idx * 2 + 1] = 0xff;
+ }
+
+ return 1;
+}
+
+/*
+ * Fill dir_slot entries with appropriate name, id, and attr
+ * The real directory entry is returned by dentptr
+ */
+static void
+fill_dir_slot (dir_entry **dentptr, const char *l_name)
+{
+ dir_slot *slotptr = (dir_slot *)get_vfatname_block;
+ __u8 counter;
+ int idx = 0, ret;
+
+ do {
+ memset(slotptr, 0x00, sizeof(dir_slot));
+ ret = str2slot(slotptr, l_name, &idx);
+ slotptr->id = ++counter;
+ slotptr->attr = ATTR_VFAT;
+ slotptr++;
+ } while (ret == 0);
+
+ slotptr--;
+ slotptr->id |= LAST_LONG_ENTRY_MASK;
+
+ while (counter >= 1) {
+ memcpy(*dentptr, slotptr, sizeof(dir_slot));
+ (*dentptr)++;
+ slotptr--;
+ counter--;
+ }
+}
+
+/*
+ * Fill alias_checksum in dir_slot with calculated checksum value
+ */
+static void fill_alias_checksum(dir_slot *slotptr, char *name)
+{
+ int i;
+ __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
+
+ for (i = 0; i < counter; i++, slotptr++)
+ slotptr->alias_checksum = mkcksum(name);
+}
+
+static int
+get_long_file_name (fsdata *mydata, int curclust, __u8 *cluster,
+ dir_entry **retdent, char *l_name)
+{
+ dir_entry *realdent;
+ dir_slot *slotptr = (dir_slot *)(*retdent);
+ __u8 *nextclust = cluster + mydata->clust_size * SECTOR_SIZE;
+ __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
+ int idx = 0;
+
+ while ((__u8 *)slotptr < nextclust) {
+ if (counter == 0)
+ break;
+ if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter)
+ return -1;
+ slotptr++;
+ counter--;
+ }
+
+ if ((__u8 *)slotptr >= nextclust) {
+ dir_slot *slotptr2;
+
+ slotptr--;
+ curclust = get_fatent(mydata, curclust);
+ if (CHECK_CLUST(curclust, mydata->fatsize)) {
+ debug("curclust: 0x%x\n", curclust);
+ printf("Invalid FAT entry\n");
+ return -1;
+ }
+
+ if (get_cluster(mydata, curclust, get_vfatname_block,
+ mydata->clust_size * SECTOR_SIZE) != 0) {
+ debug("Error: reading directory block\n");
+ return -1;
+ }
+
+ slotptr2 = (dir_slot *)get_vfatname_block;
+ while (slotptr2->id > 0x01)
+ slotptr2++;
+
+ /* Save the real directory entry */
+ realdent = (dir_entry *)slotptr2 + 1;
+ while ((__u8 *)slotptr2 >= get_vfatname_block) {
+ slot2str(slotptr2, l_name, &idx);
+ slotptr2--;
+ }
+ } else {
+ /* Save the real directory entry */
+ realdent = (dir_entry *)slotptr;
+ }
+
+ do {
+ slotptr--;
+ if (slot2str(slotptr, l_name, &idx))
+ break;
+ } while (!(slotptr->id & LAST_LONG_ENTRY_MASK));
+
+ l_name[idx] = '\0';
+ if (*l_name == DELETED_FLAG)
+ *l_name = '\0';
+ else if (*l_name == aRING)
+ *l_name = DELETED_FLAG;
+ downcase(l_name);
+
+ /* Return the real directory entry */
+ *retdent = realdent;
+
+ return 0;
+}
+
+#endif
+/*
+ * Set the entry at index 'entry' in a FAT (16/32) table.
+ */
+static int set_fatent_value (fsdata *mydata, __u32 entry, __u32 entry_value)
+{
+ __u32 bufnum, offset;
+
+ switch (mydata->fatsize) {
+ case 32:
+ bufnum = entry / FAT32BUFSIZE;
+ offset = entry - bufnum * FAT32BUFSIZE;
+ break;
+ case 16:
+ bufnum = entry / FAT16BUFSIZE;
+ offset = entry - bufnum * FAT16BUFSIZE;
+ break;
+ default:
+ /* Unsupported FAT size */
+ return -1;
+ }
+
+ /* Read a new block of FAT entries into the cache. */
+ if (bufnum != mydata->fatbufnum) {
+ int getsize = FATBUFSIZE / FS_BLOCK_SIZE;
+ __u8 *bufptr = mydata->fatbuf;
+ __u32 fatlength = mydata->fatlength;
+ __u32 startblock = bufnum * FATBUFBLOCKS;
+
+ fatlength *= SECTOR_SIZE;
+ startblock += mydata->fat_sect;
+
+ if (getsize > fatlength)
+ getsize = fatlength;
+
+ if (mydata->fatbufnum != -1) {
+ if (flush_fat_buffer(mydata) < 0)
+ return -1;
+ }
+
+ if (disk_read(startblock, getsize, bufptr) < 0) {
+ debug("Error reading FAT blocks\n");
+ return -1;
+ }
+ mydata->fatbufnum = bufnum;
+ }
+
+ /* Set the actual entry */
+ switch (mydata->fatsize) {
+ case 32:
+ ((__u32 *) mydata->fatbuf)[offset] = cpu_to_le32(entry_value);
+ break;
+ case 16:
+ ((__u32 *) mydata->fatbuf)[offset] = cpu_to_le16(entry_value);
+ break;
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+static int writeback_fatbuf(fsdata *mydata, __u32 entry)
+{
+ __u32 bufnum, offset;
+ int getsize = FATBUFSIZE / FS_BLOCK_SIZE;
+ __u32 fatlength = mydata->fatlength;
+ __u32 startblock = bufnum * FATBUFBLOCKS;
+
+ switch (mydata->fatsize) {
+ case 32:
+ bufnum = entry / FAT32BUFSIZE;
+ offset = entry - bufnum * FAT32BUFSIZE;
+ break;
+ case 16:
+ bufnum = entry / FAT16BUFSIZE;
+ offset = entry - bufnum * FAT16BUFSIZE;
+ break;
+ default:
+ /* Unsupported FAT size */
+ return -1;
+ }
+
+ /* Read a new block of FAT entries into the cache. */
+ if (bufnum != mydata->fatbufnum) {
+ fatlength *= SECTOR_SIZE;
+ startblock += mydata->fat_sect;
+
+ if (getsize > fatlength)
+ getsize = fatlength;
+
+ if (mydata->fatbufnum != -1) {
+ if (flush_fat_buffer(mydata) < 0)
+ return -1;
+ }
+ debug("bufnum : %d, offset : %d\n", bufnum, offset);
+ }
+
+ return 0;
+}
+
+/*
+ * Determine the entry value at index 'entry' in a FAT (16/32) table
+ */
+static __u32 determine_fatent (fsdata *mydata, __u32 entry)
+{
+ __u32 next_fat, next_entry = entry + 1;
+
+ while (1) {
+ writeback_fatbuf(mydata, next_entry);
+ next_fat = get_fatent(mydata, next_entry);
+ if (next_fat == 0) {
+ set_fatent_value(mydata, entry, next_entry);
+ break;
+ }
+ next_entry++;
+ }
+ debug("FAT%d: entry: %08x, entry_value: %04x\n",
+ mydata->fatsize, entry, next_entry);
+
+ return next_entry;
+}
+
+/*
+ * Write at most 'size' bytes from 'buffer' into the specified cluster.
+ * Return 0 on success, -1 otherwise.
+ */
+static int
+set_cluster (fsdata *mydata, __u32 clustnum, __u8 *buffer,
+ unsigned long size)
+{
+ int idx = 0;
+ __u32 startsect;
+
+ if (clustnum > 0) {
+ startsect = mydata->data_begin +
+ clustnum * mydata->clust_size;
+ } else {
+ startsect = mydata->rootdir_sect;
+ }
+
+ debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect);
+
+ if (disk_write(startsect, size / FS_BLOCK_SIZE, buffer) < 0) {
+ debug("Error writing data\n");
+ return -1;
+ }
+
+ if (size % FS_BLOCK_SIZE) {
+ __u8 tmpbuf[FS_BLOCK_SIZE];
+
+ memcpy(tmpbuf, buffer, size % FS_BLOCK_SIZE);
+ idx = size / FS_BLOCK_SIZE;
+
+ if (disk_write(startsect + idx, 1, tmpbuf) < 0) {
+ debug("Error writing data\n");
+ return -1;
+ }
+
+ return 0;
+ }
+
+ return 0;
+}
+
+/*
+ * Find the first empty cluster starting from cluster #2
+ */
+static int find_empty_cluster(fsdata *mydata)
+{
+ __u32 fat_val, entry = 3;
+
+ while (1) {
+ fat_val = get_fatent(mydata, entry);
+ if (fat_val == 0)
+ break;
+ entry++;
+ }
+
+ return entry;
+}
+
+/*
+ * Set empty cluster from 'entry' to the end of a file
+ */
+static int clear_fatent(fsdata *mydata, __u32 entry)
+{
+ __u32 fat_val, initial_fatbufnum = 0;
+
+ while (1) {
+ fat_val = get_fatent(mydata, entry);
+ if (fat_val != 0)
+ set_fatent_value(mydata, entry, 0);
+
+ if (fat_val == 0xfffffff || fat_val == 0xffff)
+ break;
+
+ writeback_fatbuf(mydata, fat_val);
+ entry = fat_val;
+ }
+
+ /* Flush fat buffer */
+ if (flush_fat_buffer(mydata) < 0)
+ return -1;
+
+ mydata->fatbufnum = initial_fatbufnum;
+
+ return 0;
+}
+
+/*
+ * Write at most 'maxsize' bytes from 'buffer' into
+ * the file associated with 'dentptr'
+ * Return the number of bytes read or -1 on fatal errors.
+ */
+static int
+set_contents (fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
+ unsigned long maxsize)
+{
+ unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
+ unsigned int bytesperclust = mydata->clust_size * SECTOR_SIZE;
+ __u32 curclust = START(dentptr);
+ __u32 endclust, newclust;
+ unsigned long actsize;
+
+ debug("Filesize: %ld bytes\n", filesize);
+
+ if (maxsize > 0 && filesize > maxsize)
+ filesize = maxsize;
+
+ debug("%ld bytes\n", filesize);
+
+ actsize = bytesperclust;
+ endclust = curclust;
+ do {
+ /* search for consecutive clusters */
+ while (actsize < filesize) {
+ newclust = determine_fatent(mydata, endclust);
+
+ if ((newclust - 1) != endclust)
+ goto getit;
+
+ if (CHECK_CLUST(newclust, mydata->fatsize)) {
+ debug("curclust: 0x%x\n", newclust);
+ debug("Invalid FAT entry\n");
+ return gotsize;
+ }
+ endclust = newclust;
+ actsize += bytesperclust;
+ }
+ /* actsize >= file size */
+ actsize -= bytesperclust;
+ /* set remaining clusters */
+ if (set_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
+ debug("error: writing cluster\n");
+ return -1;
+ }
+
+ /* set remaining bytes */
+ gotsize += (int)actsize;
+ filesize -= actsize;
+ buffer += actsize;
+ actsize = filesize;
+
+ if (set_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
+ debug("error: writing cluster\n");
+ return -1;
+ }
+ gotsize += actsize;
+
+ /* Mark end of file in FAT */
+ if (mydata->fatsize == 16)
+ newclust = 0xffff;
+ else if (mydata->fatsize == 32)
+ newclust = 0xfffffff;
+ set_fatent_value(mydata, endclust, newclust);
+
+ return gotsize;
+getit:
+ if (set_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
+ debug("error: writing cluster\n");
+ return -1;
+ }
+ gotsize += (int)actsize;
+ filesize -= actsize;
+ buffer += actsize;
+
+ if (CHECK_CLUST(curclust, mydata->fatsize)) {
+ debug("curclust: 0x%x\n", curclust);
+ debug("Invalid FAT entry\n");
+ return gotsize;
+ }
+ actsize = bytesperclust;
+ curclust = endclust = newclust;
+ } while (1);
+}
+
+/*
+ * Fill dir_entry entry
+ */
+static void fill_dentry (fsdata *mydata, dir_entry *dentptr,
+ const char *filename, __u32 start_cluster, __u32 size, __u8 attr)
+{
+ if (mydata->fatsize == 32)
+ dentptr->starthi = cpu_to_le16(start_cluster & 0xffff0000);
+ dentptr->start = cpu_to_le16(start_cluster & 0xffff);
+ dentptr->size = cpu_to_le32(size);
+
+ dentptr->attr = attr;
+
+ set_name(dentptr, filename);
+}
+
+/*
+ * Check whether adding a file makes the file system to
+ * exceed the size of the block device
+ * Return 1 when overflow occurs, otherwise return 0
+ */
+static int check_overflow(fsdata *mydata, __u32 clustnum, unsigned long size)
+{
+ __u32 startsect, sect_num;
+
+ if (clustnum > 0) {
+ startsect = mydata->data_begin +
+ clustnum * mydata->clust_size;
+ } else {
+ startsect = mydata->rootdir_sect;
+ }
+
+ sect_num = size / FS_BLOCK_SIZE;
+ if (size % FS_BLOCK_SIZE)
+ sect_num++;
+
+ if (startsect + sect_num > total_sector)
+ return 1;
+
+ return 0;
+}
+
+static dir_entry *empty_dentptr = NULL;
+
+static dir_entry *find_directory_entry (fsdata *mydata, int startsect,
+ char *filename, dir_entry *retdent)
+{
+ __u16 prevcksum = 0xffff;
+ __u32 curclust = startsect;
+
+ debug("get_dentfromdir: %s\n", filename);
+
+ while (1) {
+ dir_entry *dentptr;
+
+ int i;
+
+ if (disk_read(curclust, mydata->clust_size,
+ get_dentfromdir_block) < 0) {
+ printf("Error: reading directory block\n");
+ return NULL;
+ }
+
+ dentptr = (dir_entry *)get_dentfromdir_block;
+
+ for (i = 0; i < DIRENTSPERCLUST; i++) {
+ char s_name[14], l_name[256];
+
+ l_name[0] = '\0';
+ if (dentptr->name[0] == DELETED_FLAG) {
+ dentptr++;
+ continue;
+ }
+ if ((dentptr->attr & ATTR_VOLUME)) {
+#ifdef CONFIG_SUPPORT_VFAT
+ if ((dentptr->attr & ATTR_VFAT) &&
+ (dentptr-> name[0] & LAST_LONG_ENTRY_MASK)) {
+ prevcksum = ((dir_slot *)dentptr)->alias_checksum;
+ get_long_file_name(mydata, curclust,
+ get_dentfromdir_block,
+ &dentptr, l_name);
+ debug("vfatname: |%s|\n", l_name);
+ } else
+#endif
+ {
+ /* Volume label or VFAT entry */
+ dentptr++;
+ continue;
+ }
+ }
+ if (dentptr->name[0] == 0) {
+ debug("Dentname == NULL - %d\n", i);
+ empty_dentptr = dentptr;
+ return NULL;
+ }
+
+ get_name(dentptr, s_name);
+
+ if (strcmp(filename, s_name)
+ && strcmp(filename, l_name)) {
+ debug("Mismatch: |%s|%s|\n", s_name, l_name);
+ dentptr++;
+ continue;
+ }
+
+ memcpy(retdent, dentptr, sizeof(dir_entry));
+
+ debug("DentName: %s", s_name);
+ debug(", start: 0x%x", START(dentptr));
+ debug(", size: 0x%x %s\n",
+ FAT2CPU32(dentptr->size),
+ (dentptr->attr & ATTR_DIR) ? "(DIR)" : "");
+
+ return dentptr;
+ }
+
+ curclust = get_fatent(mydata, curclust);
+ if (CHECK_CLUST(curclust, mydata->fatsize)) {
+ debug("curclust: 0x%x\n", curclust);
+ printf("Invalid FAT entry\n");
+ return NULL;
+ }
+ }
+
+ return NULL;
+}
+
+static int do_fat_write (const char *filename, void *buffer,
+ unsigned long size)
+{
+ dir_entry *dentptr, *retdent;
+ dir_slot *slotptr;
+ __u32 startsect;
+ __u32 start_cluster;
+ boot_sector bs;
+ volume_info volinfo;
+ fsdata datablock;
+ fsdata *mydata = &datablock;
+ int cursect;
+ int root_cluster, ret, name_len;
+ char l_filename[256];
+
+ if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
+ debug("error: reading boot sector\n");
+ return 0;
+ }
+
+ total_sector = bs.total_sect;
+ if (total_sector == 0) {
+ total_sector = next_part_offset - part_offset;
+ }
+
+ root_cluster = bs.root_cluster;
+
+ if (mydata->fatsize == 32)
+ mydata->fatlength = bs.fat32_length;
+ else
+ mydata->fatlength = bs.fat_length;
+
+ mydata->fat_sect = bs.reserved;
+
+ cursect = mydata->rootdir_sect
+ = mydata->fat_sect + mydata->fatlength * bs.fats;
+
+ mydata->clust_size = bs.cluster_size;
+
+ if (mydata->fatsize == 32) {
+ mydata->data_begin = mydata->rootdir_sect -
+ (mydata->clust_size * 2);
+ } else {
+ int rootdir_size;
+
+ rootdir_size = ((bs.dir_entries[1] * (int)256 +
+ bs.dir_entries[0]) *
+ sizeof(dir_entry)) /
+ SECTOR_SIZE;
+ mydata->data_begin = mydata->rootdir_sect +
+ rootdir_size -
+ (mydata->clust_size * 2);
+ }
+
+ mydata->fatbufnum = -1;
+ startsect = mydata->rootdir_sect;
+
+ if (disk_read(cursect, mydata->clust_size, do_fat_read_block) < 0) {
+ printf("error: reading rootdir block\n");
+ return -1;
+ }
+ dentptr = (dir_entry *) do_fat_read_block;
+
+ name_len = strlen(filename);
+ memcpy(l_filename, filename, name_len);
+ downcase(l_filename);
+ retdent = find_directory_entry(mydata, startsect,
+ l_filename, dentptr);
+ if (retdent) {
+ /* Update file size and start_cluster in a directory entry */
+ retdent->size = cpu_to_le32(size);
+ start_cluster = FAT2CPU16(retdent->start);
+ if (mydata->fatsize == 32)
+ start_cluster |=
+ (FAT2CPU16(retdent->starthi) << 16);
+
+ ret = check_overflow(mydata, start_cluster, size);
+ if (ret) {
+ printf("error: %ld overflow\n", size);
+ return 0;
+ }
+
+ ret = clear_fatent(mydata, start_cluster);
+ if (ret < 0) {
+ printf("error: clearing FAT entries\n");
+ return 0;
+ }
+
+ ret = set_contents(mydata, retdent, buffer, size);
+ if (ret < 0) {
+ printf("error: writing contents\n");
+ return 0;
+ }
+
+ /* Flush fat buffer */
+ if (flush_fat_buffer(mydata) < 0)
+ return 0;
+
+ /* Write directory table to device */
+ if (disk_write(cursect, mydata->clust_size, get_dentfromdir_block) < 0) {
+ printf("error: wrinting directory entry\n");
+ return 0;
+ }
+ } else {
+ ret = start_cluster = find_empty_cluster(mydata);
+ if (ret < 0) {
+ printf("error: finding empty cluster\n");
+ return 0;
+ }
+
+ ret = check_overflow(mydata, start_cluster, size);
+ if (ret) {
+ printf("error: %ld overflow\n", size);
+ return 0;
+ }
+
+ slotptr = (dir_slot *)empty_dentptr;
+ fill_dir_slot(&empty_dentptr, filename);
+
+ /* Set attribute as archieve for regular file */
+ fill_dentry(mydata, empty_dentptr, filename,
+ start_cluster, size, 0x20);
+
+ fill_alias_checksum(slotptr, empty_dentptr->name);
+
+ ret = set_contents(mydata, empty_dentptr, buffer, size);
+ if (ret < 0) {
+ printf("error: writing contents\n");
+ return 0;
+ }
+
+ /* Flush fat buffer */
+ if (flush_fat_buffer(mydata) < 0)
+ return 0;
+
+ /* Write directory table to device */
+ if (disk_write(cursect, mydata->clust_size, get_dentfromdir_block) < 0) {
+ printf("error: writing directory entry\n");
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+int file_fat_write (const char *filename, void *buffer, unsigned long maxsize)
+{
+ printf("writing %s\n", filename);
+ return do_fat_write(filename, buffer, maxsize);
+}
projects / kernel / u-boot.git / commitdiff