[U-Boot] [PATCH v7 2/6] fat: prepare for API change for files greater than 2GB

Simon Glass sjg at chromium.org
Wed Nov 12 01:27:00 CET 2014


Hi,

On 10 November 2014 13:17, Suriyan Ramasami <suriyan.r at gmail.com> wrote:
> Change the internal fat functions to use loff_t for offsets.
>
> Signed-off-by: Suriyan Ramasami <suriyan.r at gmail.com>
>
> ---
>
> Changes in v7:
> * Split it so that its bisectable.

A few bits below but with these fixed:

Acked-by: Simon Glass <sjg at chromium.org>

>
>  common/cmd_fat.c   |   9 ++--
>  common/env_fat.c   |   4 +-
>  fs/fat/fat.c       | 133 +++++++++++++++++++++++++++++++----------------------
>  fs/fat/fat_write.c |  61 +++++++++++++-----------
>  fs/fat/file.c      |   4 +-
>  include/fat.h      |  13 +++---
>  6 files changed, 128 insertions(+), 96 deletions(-)
>
> diff --git a/common/cmd_fat.c b/common/cmd_fat.c
> index 633fbf1..c00fb28 100644
> --- a/common/cmd_fat.c
> +++ b/common/cmd_fat.c
> @@ -100,7 +100,8 @@ U_BOOT_CMD(
>  static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
>                 int argc, char * const argv[])
>  {
> -       long size;
> +       loff_t size;
> +       int ret;
>         unsigned long addr;
>         unsigned long count;
>         block_dev_desc_t *dev_desc = NULL;
> @@ -127,15 +128,15 @@ static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
>         count = simple_strtoul(argv[5], NULL, 16);
>
>         buf = map_sysmem(addr, count);
> -       size = file_fat_write(argv[4], buf, count);
> +       ret = file_fat_write(argv[4], buf, 0, count, &size);
>         unmap_sysmem(buf);
> -       if (size == -1) {
> +       if (ret < 0) {
>                 printf("\n** Unable to write \"%s\" from %s %d:%d **\n",
>                         argv[4], argv[1], dev, part);
>                 return 1;
>         }
>
> -       printf("%ld bytes written\n", size);
> +       printf("%llu bytes written\n", size);
>
>         return 0;
>  }
> diff --git a/common/env_fat.c b/common/env_fat.c
> index 8db0160..9a6ce63 100644
> --- a/common/env_fat.c
> +++ b/common/env_fat.c
> @@ -41,6 +41,7 @@ int saveenv(void)
>         disk_partition_t info;
>         int dev, part;
>         int err;
> +       loff_t size;
>
>         err = env_export(&env_new);
>         if (err)
> @@ -59,7 +60,8 @@ int saveenv(void)
>                 return 1;
>         }
>
> -       err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, sizeof(env_t));
> +       err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, sizeof(env_t),
> +                            &size);
>         if (err == -1) {
>                 printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
>                         FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
> diff --git a/fs/fat/fat.c b/fs/fat/fat.c
> index 561921f..29d0825 100644
> --- a/fs/fat/fat.c
> +++ b/fs/fat/fat.c
> @@ -317,32 +317,33 @@ get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size)
>  /*
>   * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr'
>   * into 'buffer'.
> - * Return the number of bytes read or -1 on fatal errors.
> + * Update the number of bytes read in *gotsize or return -1 on fatal errors.
>   */
>  __u8 get_contents_vfatname_block[MAX_CLUSTSIZE]
>         __aligned(ARCH_DMA_MINALIGN);
>
> -static long
> -get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
> -            __u8 *buffer, unsigned long maxsize)
> +static int

put this on the same line as the next

> +get_contents(fsdata *mydata, dir_entry *dentptr, loff_t pos,
> +            __u8 *buffer, loff_t maxsize, loff_t *gotsize)
>  {
> -       unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
> +       loff_t filesize = FAT2CPU32(dentptr->size);
>         unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
>         __u32 curclust = START(dentptr);
>         __u32 endclust, newclust;
> -       unsigned long actsize;
> +       loff_t actsize;
>
> -       debug("Filesize: %ld bytes\n", filesize);
> +       *gotsize = 0;
> +       debug("Filesize: %llu bytes\n", filesize);
>
>         if (pos >= filesize) {
> -               debug("Read position past EOF: %lu\n", pos);
> -               return gotsize;
> +               debug("Read position past EOF: %llu\n", pos);
> +               return 0;
>         }
>
>         if (maxsize > 0 && filesize > pos + maxsize)
>                 filesize = pos + maxsize;
>
> -       debug("%ld bytes\n", filesize);
> +       debug("%llu bytes\n", filesize);
>
>         actsize = bytesperclust;
>
> @@ -352,7 +353,7 @@ get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
>                 if (CHECK_CLUST(curclust, mydata->fatsize)) {
>                         debug("curclust: 0x%x\n", curclust);
>                         debug("Invalid FAT entry\n");
> -                       return gotsize;
> +                       return 0;
>                 }
>                 actsize += bytesperclust;
>         }
> @@ -373,16 +374,16 @@ get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
>                 filesize -= actsize;
>                 actsize -= pos;
>                 memcpy(buffer, get_contents_vfatname_block + pos, actsize);
> -               gotsize += actsize;
> +               *gotsize += actsize;
>                 if (!filesize)
> -                       return gotsize;
> +                       return 0;
>                 buffer += actsize;
>
>                 curclust = get_fatent(mydata, curclust);
>                 if (CHECK_CLUST(curclust, mydata->fatsize)) {
>                         debug("curclust: 0x%x\n", curclust);
>                         debug("Invalid FAT entry\n");
> -                       return gotsize;
> +                       return 0;
>                 }
>         }
>
> @@ -398,7 +399,7 @@ get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
>                         if (CHECK_CLUST(newclust, mydata->fatsize)) {
>                                 debug("curclust: 0x%x\n", newclust);
>                                 debug("Invalid FAT entry\n");
> -                               return gotsize;
> +                               return 0;
>                         }
>                         endclust = newclust;
>                         actsize += bytesperclust;
> @@ -410,14 +411,14 @@ get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
>                         printf("Error reading cluster\n");
>                         return -1;
>                 }
> -               gotsize += actsize;
> -               return gotsize;
> +               *gotsize += actsize;
> +               return 0;
>  getit:
>                 if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
>                         printf("Error reading cluster\n");
>                         return -1;
>                 }
> -               gotsize += (int)actsize;
> +               *gotsize += (int)actsize;
>                 filesize -= actsize;
>                 buffer += actsize;
>
> @@ -425,7 +426,7 @@ getit:
>                 if (CHECK_CLUST(curclust, mydata->fatsize)) {
>                         debug("curclust: 0x%x\n", curclust);
>                         printf("Invalid FAT entry\n");
> -                       return gotsize;
> +                       return 0;
>                 }
>                 actsize = bytesperclust;
>                 endclust = curclust;
> @@ -633,8 +634,8 @@ static dir_entry *get_dentfromdir(fsdata *mydata, int startsect,
>                                                 }
>                                                 if (doit) {
>                                                         if (dirc == ' ') {
> -                                                               printf(" %8ld   %s%c\n",
> -                                                                       (long)FAT2CPU32(dentptr->size),
> +                                                               printf(" %8u   %s%c\n",
> +                                                                      FAT2CPU32(dentptr->size),
>                                                                         l_name,
>                                                                         dirc);
>                                                         } else {
> @@ -690,8 +691,8 @@ static dir_entry *get_dentfromdir(fsdata *mydata, int startsect,
>
>                                 if (doit) {
>                                         if (dirc == ' ') {
> -                                               printf(" %8ld   %s%c\n",
> -                                                       (long)FAT2CPU32(dentptr->size),
> +                                               printf(" %8u   %s%c\n",
> +                                                      FAT2CPU32(dentptr->size),
>                                                         s_name, dirc);
>                                         } else {
>                                                 printf("            %s%c\n",
> @@ -806,9 +807,8 @@ exit:
>  __u8 do_fat_read_at_block[MAX_CLUSTSIZE]
>         __aligned(ARCH_DMA_MINALIGN);
>
> -long
> -do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
> -              unsigned long maxsize, int dols, int dogetsize)
> +int do_fat_read_at(const char *filename, loff_t pos, void *buffer,
> +                  loff_t maxsize, int dols, int dogetsize, loff_t *size)
>  {
>         char fnamecopy[2048];
>         boot_sector bs;
> @@ -821,7 +821,7 @@ do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
>         __u32 cursect;
>         int idx, isdir = 0;
>         int files = 0, dirs = 0;
> -       long ret = -1;
> +       int ret = -1;
>         int firsttime;
>         __u32 root_cluster = 0;
>         int rootdir_size = 0;
> @@ -974,8 +974,8 @@ do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
>                                                 }
>                                                 if (doit) {
>                                                         if (dirc == ' ') {
> -                                                               printf(" %8ld   %s%c\n",
> -                                                                       (long)FAT2CPU32(dentptr->size),
> +                                                               printf(" %8u   %s%c\n",
> +                                                                      FAT2CPU32(dentptr->size),
>                                                                         l_name,
>                                                                         dirc);
>                                                         } else {
> @@ -1032,8 +1032,8 @@ do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
>                                 }
>                                 if (doit) {
>                                         if (dirc == ' ') {
> -                                               printf(" %8ld   %s%c\n",
> -                                                       (long)FAT2CPU32(dentptr->size),
> +                                               printf(" %8u   %s%c\n",
> +                                                      FAT2CPU32(dentptr->size),
>                                                         s_name, dirc);
>                                         } else {
>                                                 printf("            %s%c\n",
> @@ -1102,7 +1102,7 @@ do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
>                         if (dols == LS_ROOT) {
>                                 printf("\n%d file(s), %d dir(s)\n\n",
>                                        files, dirs);
> -                               ret = 0;
> +                               *size = 0;
>                         }
>                         goto exit;
>                 }
> @@ -1141,7 +1141,7 @@ rootdir_done:
>                 if (get_dentfromdir(mydata, startsect, subname, dentptr,
>                                      isdir ? 0 : dols) == NULL) {
>                         if (dols && !isdir)
> -                               ret = 0;
> +                               *size = 0;
>                         goto exit;
>                 }
>
> @@ -1152,21 +1152,23 @@ rootdir_done:
>                         subname = nextname;
>         }
>
> -       if (dogetsize)
> -               ret = FAT2CPU32(dentptr->size);
> -       else
> -               ret = get_contents(mydata, dentptr, pos, buffer, maxsize);
> -       debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
> +       if (dogetsize) {
> +               *size = FAT2CPU32(dentptr->size);
> +               ret = 0;
> +       } else {
> +               ret = get_contents(mydata, dentptr, pos, buffer, maxsize, size);
> +       }
> +       debug("Size: %u, got: %llu\n", FAT2CPU32(dentptr->size), *size);
>
>  exit:
>         free(mydata->fatbuf);
>         return ret;
>  }
>
> -long
> -do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols)
> +int do_fat_read(const char *filename, void *buffer, loff_t maxsize, int dols,
> +               loff_t *actread)
>  {
> -       return do_fat_read_at(filename, 0, buffer, maxsize, dols, 0);
> +       return do_fat_read_at(filename, 0, buffer, maxsize, dols, 0, actread);
>  }
>
>  int file_fat_detectfs(void)
> @@ -1233,44 +1235,63 @@ int file_fat_detectfs(void)
>
>  int file_fat_ls(const char *dir)
>  {
> -       return do_fat_read(dir, NULL, 0, LS_YES);
> +       loff_t size;
> +
> +       return do_fat_read(dir, NULL, 0, LS_YES, &size);
>  }
>
>  int fat_exists(const char *filename)
>  {
> -       int sz;
> -       sz = do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1);
> -       return sz >= 0;
> +       int ret;
> +       loff_t size;

blank line here

> +       ret = do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1, &size);
> +       return ret == 0;
>  }
>
>  int fat_size(const char *filename)
>  {
> -       return do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1);
> +loff_t size;
> +int ret;

indent those two lines

> +
> +       ret = do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1, &size);
> +       if (ret)
> +               return ret;
> +       else
> +               return size;
>  }
>
> -long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
> -                     unsigned long maxsize)
> +int file_fat_read_at(const char *filename, loff_t pos, void *buffer,
> +                    loff_t maxsize, loff_t *actread)
>  {
>         printf("reading %s\n", filename);
> -       return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO, 0);
> +       return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO, 0,
> +                             actread);
>  }
>
> -long file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
> +int file_fat_read(const char *filename, void *buffer, int maxsize)
>  {
> -       return file_fat_read_at(filename, 0, buffer, maxsize);
> +loff_t actread;
> +int ret;

indent those two lines

> +
> +       ret =  file_fat_read_at(filename, 0, buffer, maxsize, &actread);
> +       if (ret)
> +               return ret;
> +       else
> +               return actread;
>  }
>
>  int fat_read_file(const char *filename, void *buf, int offset, int len)
>  {
> -       int len_read;
> +       int ret;
> +       loff_t actread;
>
> -       len_read = file_fat_read_at(filename, offset, buf, len);
> -       if (len_read == -1) {
> +       ret = file_fat_read_at(filename, offset, buf, len, &actread);
> +       if (ret) {
>                 printf("** Unable to read file %s **\n", filename);
> -               return -1;
> +               return ret;
>         }
>
> -       return len_read;
> +       return actread;
>  }
>
>  void fat_close(void)
> diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c
> index 24ed5d3..88dd495 100644
> --- a/fs/fat/fat_write.c
> +++ b/fs/fat/fat_write.c
> @@ -660,24 +660,26 @@ static int clear_fatent(fsdata *mydata, __u32 entry)
>  /*
>   * Write at most 'maxsize' bytes from 'buffer' into
>   * the file associated with 'dentptr'
> - * Return the number of bytes read or -1 on fatal errors.
> + * Update the number of bytes written in *gotsize and return 0
> + * or return -1 on fatal errors.
>   */
>  static int
>  set_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
> -             unsigned long maxsize)
> +             loff_t maxsize, loff_t *gotsize)
>  {
> -       unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
> +       loff_t filesize = FAT2CPU32(dentptr->size);
>         unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
>         __u32 curclust = START(dentptr);
>         __u32 endclust = 0, newclust = 0;
> -       unsigned long actsize;
> +       loff_t actsize;
>
> -       debug("Filesize: %ld bytes\n", filesize);
> +       *gotsize = 0;
> +       debug("Filesize: %llu bytes\n", filesize);
>
>         if (maxsize > 0 && filesize > maxsize)
>                 filesize = maxsize;
>
> -       debug("%ld bytes\n", filesize);
> +       debug("%llu bytes\n", filesize);
>
>         actsize = bytesperclust;
>         endclust = curclust;
> @@ -692,7 +694,7 @@ set_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
>                         if (CHECK_CLUST(newclust, mydata->fatsize)) {
>                                 debug("curclust: 0x%x\n", newclust);
>                                 debug("Invalid FAT entry\n");
> -                               return gotsize;
> +                               return 0;
>                         }
>                         endclust = newclust;
>                         actsize += bytesperclust;
> @@ -706,7 +708,7 @@ set_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
>                 }
>
>                 /* set remaining bytes */
> -               gotsize += (int)actsize;
> +               *gotsize += actsize;
>                 filesize -= actsize;
>                 buffer += actsize;
>                 actsize = filesize;
> @@ -715,7 +717,7 @@ set_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
>                         debug("error: writing cluster\n");
>                         return -1;
>                 }
> -               gotsize += actsize;
> +               *gotsize += actsize;
>
>                 /* Mark end of file in FAT */
>                 if (mydata->fatsize == 16)
> @@ -724,20 +726,20 @@ set_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
>                         newclust = 0xfffffff;
>                 set_fatent_value(mydata, endclust, newclust);
>
> -               return gotsize;
> +               return 0;
>  getit:
>                 if (set_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
>                         debug("error: writing cluster\n");
>                         return -1;
>                 }
> -               gotsize += (int)actsize;
> +               *gotsize += actsize;
>                 filesize -= actsize;
>                 buffer += actsize;
>
>                 if (CHECK_CLUST(curclust, mydata->fatsize)) {
>                         debug("curclust: 0x%x\n", curclust);
>                         debug("Invalid FAT entry\n");
> -                       return gotsize;
> +                       return 0;
>                 }
>                 actsize = bytesperclust;
>                 curclust = endclust = newclust;
> @@ -766,7 +768,7 @@ static void fill_dentry(fsdata *mydata, dir_entry *dentptr,
>   * 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)
> +static int check_overflow(fsdata *mydata, __u32 clustnum, loff_t size)
>  {
>         __u32 startsect, sect_num;
>
> @@ -923,8 +925,8 @@ static dir_entry *find_directory_entry(fsdata *mydata, int startsect,
>         return NULL;
>  }
>
> -static int do_fat_write(const char *filename, void *buffer,
> -       unsigned long size)
> +static int do_fat_write(const char *filename, void *buffer, loff_t size,
> +                       loff_t *actwrite)
>  {
>         dir_entry *dentptr, *retdent;
>         __u32 startsect;
> @@ -936,8 +938,8 @@ static int do_fat_write(const char *filename, void *buffer,
>         int cursect;
>         int ret = -1, name_len;
>         char l_filename[VFAT_MAXLEN_BYTES];
> -       int write_size = size;
>
> +       *actwrite = size;
>         dir_curclust = 0;
>
>         if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
> @@ -1015,7 +1017,7 @@ static int do_fat_write(const char *filename, void *buffer,
>
>                 ret = check_overflow(mydata, start_cluster, size);
>                 if (ret) {
> -                       printf("Error: %ld overflow\n", size);
> +                       printf("Error: %llu overflow\n", size);
>                         goto exit;
>                 }
>
> @@ -1025,13 +1027,12 @@ static int do_fat_write(const char *filename, void *buffer,
>                         goto exit;
>                 }
>
> -               ret = set_contents(mydata, retdent, buffer, size);
> +               ret = set_contents(mydata, retdent, buffer, size, actwrite);
>                 if (ret < 0) {
>                         printf("Error: writing contents\n");
>                         goto exit;
>                 }
> -               write_size = ret;
> -               debug("attempt to write 0x%x bytes\n", write_size);
> +               debug("attempt to write 0x%llx bytes\n", *actwrite);
>
>                 /* Flush fat buffer */
>                 ret = flush_fat_buffer(mydata);
> @@ -1061,7 +1062,7 @@ static int do_fat_write(const char *filename, void *buffer,
>
>                 ret = check_overflow(mydata, start_cluster, size);
>                 if (ret) {
> -                       printf("Error: %ld overflow\n", size);
> +                       printf("Error: %llu overflow\n", size);
>                         goto exit;
>                 }
>
> @@ -1069,13 +1070,13 @@ static int do_fat_write(const char *filename, void *buffer,
>                 fill_dentry(mydata, empty_dentptr, filename,
>                         start_cluster, size, 0x20);
>
> -               ret = set_contents(mydata, empty_dentptr, buffer, size);
> +               ret = set_contents(mydata, empty_dentptr, buffer, size,
> +                                  actwrite);
>                 if (ret < 0) {
>                         printf("Error: writing contents\n");
>                         goto exit;
>                 }
> -               write_size = ret;
> -               debug("attempt to write 0x%x bytes\n", write_size);
> +               debug("attempt to write 0x%llx bytes\n", *actwrite);
>
>                 /* Flush fat buffer */
>                 ret = flush_fat_buffer(mydata);
> @@ -1096,11 +1097,17 @@ static int do_fat_write(const char *filename, void *buffer,
>
>  exit:
>         free(mydata->fatbuf);
> -       return ret < 0 ? ret : write_size;
> +       return ret;
>  }
>
> -int file_fat_write(const char *filename, void *buffer, unsigned long maxsize)
> +int file_fat_write(const char *filename, void *buffer, loff_t offset,
> +                  loff_t maxsize, loff_t *actwrite)
>  {
> +       if (offset != 0) {
> +               printf("Error: non zero offset is currently not suported.\n");
> +               return -1;
> +       }
> +
>         printf("writing %s\n", filename);
> -       return do_fat_write(filename, buffer, maxsize);
> +       return do_fat_write(filename, buffer, maxsize, actwrite);
>  }
> diff --git a/fs/fat/file.c b/fs/fat/file.c
> index d910c46..98559f2 100644
> --- a/fs/fat/file.c
> +++ b/fs/fat/file.c
> @@ -162,8 +162,8 @@ file_ls(const char *dir)
>         return filesystems[current_filesystem].ls(arg);
>  }
>
> -long
> -file_read(const char *filename, void *buffer, unsigned long maxsize)
> +int

put on next line

> +file_read(const char *filename, void *buffer, int maxsize)
>  {
>         char fullpath[1024];
>         const char *arg;
> diff --git a/include/fat.h b/include/fat.h
> index 20ca3f3..99c6429 100644
> --- a/include/fat.h
> +++ b/include/fat.h
> @@ -178,8 +178,8 @@ typedef struct {
>
>  typedef int    (file_detectfs_func)(void);
>  typedef int    (file_ls_func)(const char *dir);
> -typedef long   (file_read_func)(const char *filename, void *buffer,
> -                                unsigned long maxsize);
> +typedef int    (file_read_func)(const char *filename, void *buffer,
> +                                int maxsize);
>
>  struct filesystem {
>         file_detectfs_func      *detect;
> @@ -199,14 +199,15 @@ int file_fat_detectfs(void);
>  int file_fat_ls(const char *dir);
>  int fat_exists(const char *filename);
>  int fat_size(const char *filename);
> -long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
> -                     unsigned long maxsize);
> -long file_fat_read(const char *filename, void *buffer, unsigned long maxsize);
> +int file_fat_read_at(const char *filename, loff_t pos, void *buffer,
> +                    loff_t maxsize, loff_t *actread);
> +int file_fat_read(const char *filename, void *buffer, int maxsize);
>  const char *file_getfsname(int idx);
>  int fat_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
>  int fat_register_device(block_dev_desc_t *dev_desc, int part_no);
>
> -int file_fat_write(const char *filename, void *buffer, unsigned long maxsize);
> +int file_fat_write(const char *filename, void *buf, loff_t offset, loff_t len,
> +                  loff_t *actwrite);
>  int fat_read_file(const char *filename, void *buf, int offset, int len);
>  void fat_close(void);
>  #endif /* _FAT_H_ */
> --
> 1.9.1
>

Regards,
Simon


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