[U-Boot] [PATCH v7 5/6] fs: API changes to enable extra parameter to return size of type loff_t
Simon Glass
sjg at chromium.org
Wed Nov 12 01:55:12 CET 2014
On 10 November 2014 13:17, Suriyan Ramasami <suriyan.r at gmail.com> wrote:
> The sandbox/ext4/fat/generic fs commands do not gracefully deal with file
> greater than 2GB. Negative values are returned in such cases.
>
> To handle this, the fs functions have been modified to take an additional
> parameter of type "* loff_t" which is then populated. The return value of
> the fs fucntions are used only for error conditions.
>
> Signed-off-by: Suriyan Ramasami <suriyan.r at gmail.com>
A few nits below, but:
Acked-by: Simon Glass <sjg at chromium.org>
>
> ---
>
> Changes in v7:
> * Simon - API change in separate patch
>
> common/cmd_fs.c | 17 +++++++++++
> fs/ext4/ext4fs.c | 22 ++++-----------
> fs/fat/fat.c | 20 ++++---------
> fs/fs.c | 77 ++++++++++++++++++++++++++++++--------------------
> fs/sandbox/sandboxfs.c | 29 +++++++------------
> include/ext4fs.h | 5 ++--
> include/fat.h | 5 ++--
> include/fs.h | 41 ++++++++++++++++-----------
> include/sandboxfs.h | 8 ++++--
> 9 files changed, 121 insertions(+), 103 deletions(-)
>
> diff --git a/common/cmd_fs.c b/common/cmd_fs.c
> index 6754340..0d9da11 100644
> --- a/common/cmd_fs.c
> +++ b/common/cmd_fs.c
> @@ -51,6 +51,23 @@ U_BOOT_CMD(
> " If 'pos' is 0 or omitted, the file is read from the start."
> )
>
> +static int do_save_wrapper(cmd_tbl_t *cmdtp, int flag, int argc,
> + char * const argv[])
> +{
> + return do_save(cmdtp, flag, argc, argv, FS_TYPE_ANY);
> +}
> +
> +U_BOOT_CMD(
> + save, 7, 0, do_save_wrapper,
> + "save file to a filesystem",
> + "<interface> <dev[:part]> <addr> <filename> bytes [pos]\n"
> + " - Save binary file 'filename' to partition 'part' on device\n"
> + " type 'interface' instance 'dev' from addr 'addr' in memory.\n"
> + " 'bytes' gives the size to save in bytes and is mandatory.\n"
> + " 'pos' gives the file byte position to start writing to.\n"
> + " If 'pos' is 0 or omitted, the file is written from the start."
> +)
> +
> static int do_ls_wrapper(cmd_tbl_t *cmdtp, int flag, int argc,
> char * const argv[])
> {
> diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
> index dcb4151..ae1c47d 100644
> --- a/fs/ext4/ext4fs.c
> +++ b/fs/ext4/ext4fs.c
> @@ -184,16 +184,9 @@ int ext4fs_exists(const char *filename)
> return ret == 0;
> }
>
> -int ext4fs_size(const char *filename)
> +int ext4fs_size(const char *filename, loff_t *size)
> {
> - loff_t size;
> - int ret;
> -
> - ret = ext4fs_open(filename, &size);
> - if (ret)
> - return ret;
> - else
> - return size;
> + return ext4fs_open(filename, size);
> }
>
> int ext4fs_read(char *buf, loff_t len, loff_t *actread)
> @@ -217,10 +210,10 @@ int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
> return 0;
> }
>
> -int ext4_read_file(const char *filename, void *buf, int offset, int len)
> +int ext4_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
> + loff_t *len_read)
> {
> loff_t file_len;
> - loff_t len_read;
> int ret;
>
> if (offset != 0) {
> @@ -237,10 +230,7 @@ int ext4_read_file(const char *filename, void *buf, int offset, int len)
> if (len == 0)
> len = file_len;
>
> - ret = ext4fs_read(buf, len, &len_read);
> + ret = ext4fs_read(buf, len, len_read);
>
> - if (ret)
> - return ret;
> - else
> - return len_read;
> + return ret;
Probably don't need ret here
> }
> diff --git a/fs/fat/fat.c b/fs/fat/fat.c
> index 29d0825..993b1f2 100644
> --- a/fs/fat/fat.c
> +++ b/fs/fat/fat.c
> @@ -1248,16 +1248,9 @@ int fat_exists(const char *filename)
> return ret == 0;
> }
>
> -int fat_size(const char *filename)
> +int fat_size(const char *filename, loff_t *size)
> {
> -loff_t size;
> -int ret;
> -
> - ret = do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1, &size);
> - if (ret)
> - return ret;
> - else
> - return size;
> + return do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1, size);
> }
>
> int file_fat_read_at(const char *filename, loff_t pos, void *buffer,
> @@ -1280,18 +1273,17 @@ int ret;
> return actread;
> }
>
> -int fat_read_file(const char *filename, void *buf, int offset, int len)
> +int fat_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
> + loff_t *actread)
> {
> int ret;
> - loff_t actread;
>
> - ret = file_fat_read_at(filename, offset, buf, len, &actread);
> + ret = file_fat_read_at(filename, offset, buf, len, actread);
> if (ret) {
> printf("** Unable to read file %s **\n", filename);
> - return ret;
> }
Remove {} around that
>
> - return actread;
> + return ret;
> }
>
> void fat_close(void)
> diff --git a/fs/fs.c b/fs/fs.c
> index dd680f3..0f5a1f4 100644
> --- a/fs/fs.c
> +++ b/fs/fs.c
> @@ -46,19 +46,21 @@ static inline int fs_exists_unsupported(const char *filename)
> return 0;
> }
>
> -static inline int fs_size_unsupported(const char *filename)
> +static inline int fs_size_unsupported(const char *filename, loff_t *size)
> {
> return -1;
> }
>
> static inline int fs_read_unsupported(const char *filename, void *buf,
> - int offset, int len)
> + loff_t offset, loff_t len,
> + loff_t *actread)
> {
> return -1;
> }
>
> static inline int fs_write_unsupported(const char *filename, void *buf,
> - int offset, int len)
> + loff_t offset, loff_t len,
> + loff_t *actwrite)
> {
> return -1;
> }
> @@ -82,9 +84,11 @@ struct fstype_info {
> disk_partition_t *fs_partition);
> int (*ls)(const char *dirname);
> int (*exists)(const char *filename);
> - int (*size)(const char *filename);
> - int (*read)(const char *filename, void *buf, int offset, int len);
> - int (*write)(const char *filename, void *buf, int offset, int len);
> + int (*size)(const char *filename, loff_t *size);
> + int (*read)(const char *filename, void *buf, loff_t offset,
> + loff_t len, loff_t *actread);
> + int (*write)(const char *filename, void *buf, loff_t offset,
> + loff_t len, loff_t *actwrite);
> void (*close)(void);
> };
>
> @@ -99,7 +103,11 @@ static struct fstype_info fstypes[] = {
> .exists = fat_exists,
> .size = fat_size,
> .read = fat_read_file,
> +#ifdef CONFIG_FAT_WRITE
> + .write = file_fat_write,
> +#else
> .write = fs_write_unsupported,
> +#endif
> },
> #endif
> #ifdef CONFIG_FS_EXT4
> @@ -112,7 +120,11 @@ static struct fstype_info fstypes[] = {
> .exists = ext4fs_exists,
> .size = ext4fs_size,
> .read = ext4_read_file,
> +#ifdef CONFIG_CMD_EXT4_WRITE
> + .write = ext4_write_file,
> +#else
> .write = fs_write_unsupported,
> +#endif
> },
> #endif
> #ifdef CONFIG_SANDBOX
> @@ -233,20 +245,21 @@ int fs_exists(const char *filename)
> return ret;
> }
>
> -int fs_size(const char *filename)
> +int fs_size(const char *filename, loff_t *size)
> {
> int ret;
>
> struct fstype_info *info = fs_get_info(fs_type);
>
> - ret = info->size(filename);
> + ret = info->size(filename, size);
>
> fs_close();
>
> return ret;
> }
>
> -int fs_read(const char *filename, ulong addr, int offset, int len)
> +int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
> + loff_t *actread)
> {
> struct fstype_info *info = fs_get_info(fs_type);
> void *buf;
> @@ -257,11 +270,11 @@ int fs_read(const char *filename, ulong addr, int offset, int len)
> * means read the whole file.
> */
> buf = map_sysmem(addr, len);
> - ret = info->read(filename, buf, offset, len);
> + ret = info->read(filename, buf, offset, len, actread);
> unmap_sysmem(buf);
>
> /* If we requested a specific number of bytes, check we got it */
> - if (ret >= 0 && len && ret != len) {
> + if (ret == 0 && len && *actread != len) {
> printf("** Unable to read file %s **\n", filename);
> ret = -1;
> }
> @@ -270,17 +283,18 @@ int fs_read(const char *filename, ulong addr, int offset, int len)
> return ret;
> }
>
> -int fs_write(const char *filename, ulong addr, int offset, int len)
> +int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
> + loff_t *actwrite)
> {
> struct fstype_info *info = fs_get_info(fs_type);
> void *buf;
> int ret;
>
> buf = map_sysmem(addr, len);
> - ret = info->write(filename, buf, offset, len);
> + ret = info->write(filename, buf, offset, len, actwrite);
> unmap_sysmem(buf);
>
> - if (ret >= 0 && ret != len) {
> + if (ret < 0 && len != *actwrite) {
> printf("** Unable to write file %s **\n", filename);
> ret = -1;
> }
> @@ -292,7 +306,7 @@ int fs_write(const char *filename, ulong addr, int offset, int len)
> int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
> int fstype)
> {
> - int size;
> + loff_t size;
>
> if (argc != 4)
> return CMD_RET_USAGE;
> @@ -300,8 +314,7 @@ int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
> if (fs_set_blk_dev(argv[1], argv[2], fstype))
> return 1;
>
> - size = fs_size(argv[3]);
> - if (size < 0)
> + if (fs_size(argv[3], &size) < 0)
> return CMD_RET_FAILURE;
>
> setenv_hex("filesize", size);
> @@ -315,9 +328,10 @@ int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
> unsigned long addr;
> const char *addr_str;
> const char *filename;
> - unsigned long bytes;
> - unsigned long pos;
> - int len_read;
> + loff_t bytes;
> + loff_t pos;
> + loff_t len_read;
> + int ret;
> unsigned long time;
> char *ep;
>
> @@ -359,12 +373,12 @@ int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
> pos = 0;
>
> time = get_timer(0);
> - len_read = fs_read(filename, addr, pos, bytes);
> + ret = fs_read(filename, addr, pos, bytes, &len_read);
> time = get_timer(time);
> - if (len_read <= 0)
> + if (ret < 0)
> return 1;
>
> - printf("%d bytes read in %lu ms", len_read, time);
> + printf("%llu bytes read in %lu ms", len_read, time);
> if (time > 0) {
> puts(" (");
> print_size(len_read / time * 1000, "/s");
> @@ -408,9 +422,10 @@ int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
> {
> unsigned long addr;
> const char *filename;
> - unsigned long bytes;
> - unsigned long pos;
> - int len;
> + loff_t bytes;
> + loff_t pos;
> + loff_t len;
> + int ret;
> unsigned long time;
>
> if (argc < 6 || argc > 7)
> @@ -419,8 +434,8 @@ int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
> if (fs_set_blk_dev(argv[1], argv[2], fstype))
> return 1;
>
> - filename = argv[3];
> - addr = simple_strtoul(argv[4], NULL, 16);
> + addr = simple_strtoul(argv[3], NULL, 16);
> + filename = argv[4];
> bytes = simple_strtoul(argv[5], NULL, 16);
> if (argc >= 7)
> pos = simple_strtoul(argv[6], NULL, 16);
> @@ -428,12 +443,12 @@ int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
> pos = 0;
>
> time = get_timer(0);
> - len = fs_write(filename, addr, pos, bytes);
> + ret = fs_write(filename, addr, pos, bytes, &len);
> time = get_timer(time);
> - if (len <= 0)
> + if (ret < 0)
> return 1;
>
> - printf("%d bytes written in %lu ms", len, time);
> + printf("%llu bytes written in %lu ms", len, time);
> if (time > 0) {
> puts(" (");
> print_size(len / time * 1000, "/s");
> diff --git a/fs/sandbox/sandboxfs.c b/fs/sandbox/sandboxfs.c
> index 312caec..ca25104 100644
> --- a/fs/sandbox/sandboxfs.c
> +++ b/fs/sandbox/sandboxfs.c
> @@ -103,46 +103,37 @@ int sandbox_fs_exists(const char *filename)
> return ret == 0;
> }
>
> -int sandbox_fs_size(const char *filename)
> +int sandbox_fs_size(const char *filename, loff_t *size)
> {
> - loff_t size;
> - int ret;
> -
> - ret = os_get_filesize(filename, &size);
> - if (ret)
> - return ret;
> - else
> - return size;
> + return os_get_filesize(filename, size);
> }
>
> void sandbox_fs_close(void)
> {
> }
>
> -int fs_read_sandbox(const char *filename, void *buf, int offset, int len)
> +int fs_read_sandbox(const char *filename, void *buf, loff_t offset, loff_t len,
> + loff_t *actread)
> {
> int ret;
> - loff_t actread;
>
> - ret = sandbox_fs_read_at(filename, offset, buf, len, &actread);
> + ret = sandbox_fs_read_at(filename, offset, buf, len, actread);
> if (ret) {
> printf("** Unable to read file %s **\n", filename);
> - return ret;
> }
Remove {}
>
> - return actread;
> + return ret;
> }
>
> -int fs_write_sandbox(const char *filename, void *buf, int offset, int len)
> +int fs_write_sandbox(const char *filename, void *buf, loff_t offset,
> + loff_t len, loff_t *actwrite)
> {
> int ret;
> - loff_t actwrite;
>
> - ret = sandbox_fs_write_at(filename, offset, buf, len, &actwrite);
> + ret = sandbox_fs_write_at(filename, offset, buf, len, actwrite);
> if (ret) {
> printf("** Unable to write file %s **\n", filename);
> - return ret;
> }
Remove {}
>
> - return actwrite;
> + return ret;
> }
> diff --git a/include/ext4fs.h b/include/ext4fs.h
> index 66841e7..7630057 100644
> --- a/include/ext4fs.h
> +++ b/include/ext4fs.h
> @@ -138,13 +138,14 @@ void ext4fs_close(void);
> void ext4fs_reinit_global(void);
> int ext4fs_ls(const char *dirname);
> int ext4fs_exists(const char *filename);
> -int ext4fs_size(const char *filename);
> +int ext4fs_size(const char *filename, loff_t *size);
> void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot);
> int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len, char *buf);
> void ext4fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
> long int read_allocated_block(struct ext2_inode *inode, int fileblock);
> int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
> disk_partition_t *fs_partition);
> -int ext4_read_file(const char *filename, void *buf, int offset, int len);
> +int ext4_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
> + loff_t *actread);
> int ext4_read_superblock(char *buffer);
> #endif
> diff --git a/include/fat.h b/include/fat.h
> index 99c6429..3038bd7 100644
> --- a/include/fat.h
> +++ b/include/fat.h
> @@ -198,7 +198,7 @@ int file_cd(const char *path);
> int file_fat_detectfs(void);
> int file_fat_ls(const char *dir);
> int fat_exists(const char *filename);
> -int fat_size(const char *filename);
> +int fat_size(const char *filename, loff_t *size);
> 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);
> @@ -208,6 +208,7 @@ int fat_register_device(block_dev_desc_t *dev_desc, int part_no);
>
> 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);
> +int fat_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
> + loff_t *actread);
> void fat_close(void);
> #endif /* _FAT_H_ */
> diff --git a/include/fs.h b/include/fs.h
> index 06a45f2..95966dd 100644
> --- a/include/fs.h
> +++ b/include/fs.h
> @@ -51,32 +51,41 @@ int fs_ls(const char *dirname);
> int fs_exists(const char *filename);
>
> /*
> - * Determine a file's size
> + * fs_size - Determine a file's size
> *
> - * Returns the file's size in bytes, or a negative value if it doesn't exist.
> + * @filename: Name of the file
> + * @size: Size of file
> + * @return 0 if ok with valid *size, negative on error
> */
> -int fs_size(const char *filename);
> +int fs_size(const char *filename, loff_t *size);
>
> /*
> - * Read file "filename" from the partition previously set by fs_set_blk_dev(),
> - * to address "addr", starting at byte offset "offset", and reading "len"
> - * bytes. "offset" may be 0 to read from the start of the file. "len" may be
> - * 0 to read the entire file. Note that not all filesystem types support
> - * either/both offset!=0 or len!=0.
> + * fs_read - Read file from the partition previously set by fs_set_blk_dev()
> + * Note that not all filesystem types support either/both offset!=0 or len!=0.
> *
> - * Returns number of bytes read on success. Returns <= 0 on error.
> + * @filename: Name of file to read from
> + * @addr: The address to read into
> + * @offset: The offset in file to read from
> + * @len: The number of bytes to read. Maybe 0 to read entire file
> + * @actread: Returns the actual number of bytes read
> + * @return 0 if ok with valid *actread, -1 on error conditions
> */
> -int fs_read(const char *filename, ulong addr, int offset, int len);
> +int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
> + loff_t *actread);
>
> /*
> - * Write file "filename" to the partition previously set by fs_set_blk_dev(),
> - * from address "addr", starting at byte offset "offset", and writing "len"
> - * bytes. "offset" may be 0 to write to the start of the file. Note that not
> - * all filesystem types support offset!=0.
> + * fs_write - Write file to the partition previously set by fs_set_blk_dev()
> + * Note that not all filesystem types support offset!=0.
> *
> - * Returns number of bytes read on success. Returns <= 0 on error.
> + * @filename: Name of file to read from
> + * @addr: The address to read into
> + * @offset: The offset in file to read from. Maybe 0 to write to start of file
> + * @len: The number of bytes to write
> + * @actwrite: Returns the actual number of bytes written
> + * @return 0 if ok with valid *actwrite, -1 on error conditions
> */
> -int fs_write(const char *filename, ulong addr, int offset, int len);
> +int fs_write(const char *filename, ulong addr, loff_t offset, loff_t len,
> + loff_t *actwrite);
>
> /*
> * Common implementation for various filesystem commands, optionally limited
> diff --git a/include/sandboxfs.h b/include/sandboxfs.h
> index 8e5da6b..4c7745d 100644
> --- a/include/sandboxfs.h
> +++ b/include/sandboxfs.h
> @@ -28,8 +28,10 @@ int sandbox_fs_write_at(const char *filename, loff_t pos, void *buffer,
> void sandbox_fs_close(void);
> int sandbox_fs_ls(const char *dirname);
> int sandbox_fs_exists(const char *filename);
> -int sandbox_fs_size(const char *filename);
> -int fs_read_sandbox(const char *filename, void *buf, int offset, int len);
> -int fs_write_sandbox(const char *filename, void *buf, int offset, int len);
> +int sandbox_fs_size(const char *filename, loff_t *size);
> +int fs_read_sandbox(const char *filename, void *buf, loff_t offset, loff_t len,
> + loff_t *actread);
> +int fs_write_sandbox(const char *filename, void *buf, loff_t offset,
> + loff_t len, loff_t *actwrite);
>
> #endif
> --
> 1.9.1
>
Regards,
Simon
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