}
}
+static void uppercase (char *str, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++) {
+ TOUPPER(*str);
+ str++;
+ }
+}
+
static block_dev_desc_t *cur_dev = NULL;
static unsigned long part_offset = 0;
return -1;
}
+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) {
+ debug("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;
+}
+
int fat_register_device (block_dev_desc_t * dev_desc, int part_no)
{
unsigned char buffer[SECTOR_SIZE];
}
/*
+ * 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;
+}
+
+/*
* Get the entry at index 'entry' in a FAT (12/16/32) table.
* On failure 0x00 is returned.
*/
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 ret;
}
/*
+ * 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;
+}
+
+/*
* Extract the full long filename starting at 'retdent' (which is really
* a slot) into 'l_name'. If successful also copy the real directory entry
* into 'retdent'
static int
get_vfatname (fsdata *mydata, int curclust, __u8 *cluster,
- dir_entry *retdent, char *l_name)
+ dir_entry **retdent, char *l_name)
{
dir_entry *realdent;
- dir_slot *slotptr = (dir_slot *)retdent;
+ 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;
downcase(l_name);
/* Return the real directory entry */
- memcpy(retdent, realdent, sizeof(dir_entry));
+ *retdent = realdent;
return 0;
}
+/*
+ * 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 {
+ 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--;
+ }
+}
+
/* Calculate short name checksum */
static __u8 mkcksum (const char *str)
{
return ret;
}
+
+/*
+ * 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);
+}
#endif /* CONFIG_SUPPORT_VFAT */
/*
__attribute__ ((__aligned__ (__alignof__ (dir_entry))))
__u8 get_dentfromdir_block[MAX_CLUSTSIZE];
+static dir_entry *empty_dentptr = NULL;
+
static dir_entry *get_dentfromdir (fsdata *mydata, int startsect,
char *filename, dir_entry *retdent,
int dols)
{
__u16 prevcksum = 0xffff;
- __u32 curclust = START(retdent);
+ __u32 curclust = startsect;
int files = 0, dirs = 0;
debug("get_dentfromdir: %s\n", filename);
int i;
- if (get_cluster(mydata, curclust, get_dentfromdir_block,
- mydata->clust_size * SECTOR_SIZE) != 0) {
- debug("Error: reading directory block\n");
+ if (disk_read(curclust, mydata->clust_size,
+ get_dentfromdir_block) < 0) {
+ printf("Error: reading directory block\n");
return NULL;
}
prevcksum = ((dir_slot *)dentptr)->alias_checksum;
get_vfatname(mydata, curclust,
get_dentfromdir_block,
- dentptr, l_name);
+ &dentptr, l_name);
if (dols) {
int isdir;
char dirc;
files, dirs);
}
debug("Dentname == NULL - %d\n", i);
+ empty_dentptr = dentptr;
return NULL;
}
#ifdef CONFIG_SUPPORT_VFAT
FAT2CPU32(dentptr->size),
(dentptr->attr & ATTR_DIR) ? "(DIR)" : "");
- return retdent;
+ return dentptr;
}
curclust = get_fatent(mydata, curclust);
bs->heads = FAT2CPU16(bs->heads);
bs->total_sect = FAT2CPU32(bs->total_sect);
+ total_sector = bs->total_sect;
+
/* FAT32 entries */
if (bs->fat_length == 0) {
/* Assume FAT32 */
get_vfatname(mydata, 0,
do_fat_read_block,
- dentptr, l_name);
+ &dentptr, l_name);
if (dols == LS_ROOT) {
char dirc;
printf("reading %s\n", filename);
return do_fat_read(filename, buffer, maxsize, LS_NO);
}
+
+/*
+ * 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;
+}
+
+/*
+ * 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;
+
+ while (1) {
+ next_fat = get_fatent(mydata, ++next_entry);
+ if (next_fat == 0) {
+ set_fatent_value(mydata, entry, next_entry);
+ break;
+ }
+ }
+ 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 = 2;
+
+ 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;
+
+ 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;
+ entry++;
+ }
+
+ 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 */
+ 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 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;
+ }
+
+ 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 = get_dentfromdir(mydata, startsect,
+ l_filename, dentptr, LS_NO);
+ 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;
+ }
+
+ /* Flush fat buffer */
+ if (flush_fat_buffer(mydata) < 0)
+ 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