[U-Boot] [PATCH v8 3/6] ext4: Prepare API change for files greater than 2GB
Suriyan Ramasami
suriyan.r at gmail.com
Mon Nov 17 23:39:36 CET 2014
Change the internal EXT4 functions to use loff_t for offsets.
Signed-off-by: Suriyan Ramasami <suriyan.r at gmail.com>
Acked-by: Simon Glass <sjg at chromium.org>
---
Changes in v8:
- None
Changes in v7:
- Split this patch for bisectability.
Changes in v6: None
Changes in v5: None
common/cmd_ext4.c | 61 +++++++--------------------------------------------
fs/ext4/ext4_common.c | 24 ++++++++++----------
fs/ext4/ext4_common.h | 4 ++--
fs/ext4/ext4_write.c | 32 +++++++++++++++++++++++++++
fs/ext4/ext4fs.c | 43 +++++++++++++++++++++++-------------
include/ext4fs.h | 8 ++++---
6 files changed, 88 insertions(+), 84 deletions(-)
diff --git a/common/cmd_ext4.c b/common/cmd_ext4.c
index ecfc6d3..19423d1 100644
--- a/common/cmd_ext4.c
+++ b/common/cmd_ext4.c
@@ -61,61 +61,16 @@ int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
#if defined(CONFIG_CMD_EXT4_WRITE)
int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
- char *const argv[])
+ char *const argv[])
{
- const char *filename = "/";
- int dev, part;
- unsigned long ram_address;
- unsigned long file_size;
- disk_partition_t info;
- block_dev_desc_t *dev_desc;
-
- if (argc < 6)
- return cmd_usage(cmdtp);
-
- part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
- if (part < 0)
- return 1;
-
- dev = dev_desc->dev;
-
- /* get the filename */
- filename = argv[4];
-
- /* get the address in hexadecimal format (string to int) */
- ram_address = simple_strtoul(argv[3], NULL, 16);
-
- /* get the filesize in hexadecimal format */
- file_size = simple_strtoul(argv[5], NULL, 16);
-
- /* set the device as block device */
- ext4fs_set_blk_dev(dev_desc, &info);
-
- /* mount the filesystem */
- if (!ext4fs_mount(info.size)) {
- printf("Bad ext4 partition %s %d:%d\n", argv[1], dev, part);
- goto fail;
- }
-
- /* start write */
- if (ext4fs_write(filename, (unsigned char *)ram_address, file_size)) {
- printf("** Error ext4fs_write() **\n");
- goto fail;
- }
- ext4fs_close();
-
- return 0;
-
-fail:
- ext4fs_close();
-
- return 1;
+ return do_save(cmdtp, flag, argc, argv, FS_TYPE_EXT);
}
-U_BOOT_CMD(ext4write, 6, 1, do_ext4_write,
- "create a file in the root directory",
- "<interface> <dev[:part]> <addr> <absolute filename path> [sizebytes]\n"
- " - create a file in / directory");
+U_BOOT_CMD(ext4write, 7, 1, do_ext4_write,
+ "create a file in the root directory",
+ "<interface> <dev[:part]> <addr> <absolute filename path>\n"
+ " [sizebytes] [file offset]\n"
+ " - create a file in / directory");
#endif
@@ -132,7 +87,7 @@ U_BOOT_CMD(ext4ls, 4, 1, do_ext4_ls,
"<interface> <dev[:part]> [directory]\n"
" - list files from 'dev' on 'interface' in a 'directory'");
-U_BOOT_CMD(ext4load, 6, 0, do_ext4_load,
+U_BOOT_CMD(ext4load, 7, 0, do_ext4_load,
"load binary file from a Ext4 filesystem",
"<interface> [<dev[:part]> [addr [filename [bytes [pos]]]]]\n"
" - load binary file 'filename' from 'dev' on 'interface'\n"
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
index cccc06a..cab5465 100644
--- a/fs/ext4/ext4_common.c
+++ b/fs/ext4/ext4_common.c
@@ -1892,6 +1892,7 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
{
unsigned int fpos = 0;
int status;
+ loff_t actread;
struct ext2fs_node *diro = (struct ext2fs_node *) dir;
#ifdef DEBUG
@@ -1909,8 +1910,8 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
status = ext4fs_read_file(diro, fpos,
sizeof(struct ext2_dirent),
- (char *) &dirent);
- if (status < 1)
+ (char *)&dirent, &actread);
+ if (status < 0)
return 0;
if (dirent.namelen != 0) {
@@ -1921,8 +1922,9 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
status = ext4fs_read_file(diro,
fpos +
sizeof(struct ext2_dirent),
- dirent.namelen, filename);
- if (status < 1)
+ dirent.namelen, filename,
+ &actread);
+ if (status < 0)
return 0;
fdiro = zalloc(sizeof(struct ext2fs_node));
@@ -2004,8 +2006,8 @@ int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
printf("< ? > ");
break;
}
- printf("%10d %s\n",
- __le32_to_cpu(fdiro->inode.size),
+ printf("%10u %s\n",
+ __le32_to_cpu(fdiro->inode.size),
filename);
}
free(fdiro);
@@ -2020,6 +2022,7 @@ static char *ext4fs_read_symlink(struct ext2fs_node *node)
char *symlink;
struct ext2fs_node *diro = node;
int status;
+ loff_t actread;
if (!diro->inode_read) {
status = ext4fs_read_inode(diro->data, diro->ino, &diro->inode);
@@ -2036,7 +2039,7 @@ static char *ext4fs_read_symlink(struct ext2fs_node *node)
} else {
status = ext4fs_read_file(diro, 0,
__le32_to_cpu(diro->inode.size),
- symlink);
+ symlink, &actread);
if (status == 0) {
free(symlink);
return 0;
@@ -2170,11 +2173,10 @@ int ext4fs_find_file(const char *path, struct ext2fs_node *rootnode,
return 1;
}
-int ext4fs_open(const char *filename)
+int ext4fs_open(const char *filename, loff_t *len)
{
struct ext2fs_node *fdiro = NULL;
int status;
- int len;
if (ext4fs_root == NULL)
return -1;
@@ -2191,10 +2193,10 @@ int ext4fs_open(const char *filename)
if (status == 0)
goto fail;
}
- len = __le32_to_cpu(fdiro->inode.size);
+ *len = __le32_to_cpu(fdiro->inode.size);
ext4fs_file = fdiro;
- return len;
+ return 0;
fail:
ext4fs_free_node(fdiro, &ext4fs_root->diropen);
diff --git a/fs/ext4/ext4_common.h b/fs/ext4/ext4_common.h
index 5fa1719..48fd2ac 100644
--- a/fs/ext4/ext4_common.h
+++ b/fs/ext4/ext4_common.h
@@ -50,8 +50,8 @@ static inline void *zalloc(size_t size)
int ext4fs_read_inode(struct ext2_data *data, int ino,
struct ext2_inode *inode);
-int ext4fs_read_file(struct ext2fs_node *node, int pos,
- unsigned int len, char *buf);
+int ext4fs_read_file(struct ext2fs_node *node, loff_t pos, loff_t len,
+ char *buf, loff_t *actread);
int ext4fs_find_file(const char *path, struct ext2fs_node *rootnode,
struct ext2fs_node **foundnode, int expecttype);
int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
diff --git a/fs/ext4/ext4_write.c b/fs/ext4/ext4_write.c
index 648a596..f7c52cc 100644
--- a/fs/ext4/ext4_write.c
+++ b/fs/ext4/ext4_write.c
@@ -975,3 +975,35 @@ fail:
return -1;
}
+
+int ext4_write_file(const char *filename, void *buf, loff_t offset,
+ loff_t len, loff_t *actwrite)
+{
+ int ret;
+
+ if (offset != 0) {
+ printf("** Cannot support non-zero offset **\n");
+ return -1;
+ }
+
+ /* mount the filesystem */
+ if (!ext4fs_mount(0)) {
+ printf("** Error Bad ext4 partition **\n");
+ goto fail;
+ }
+
+ ret = ext4fs_write(filename, buf, len);
+
+ if (ret) {
+ printf("** Error ext4fs_write() **\n");
+ goto fail;
+ }
+ ext4fs_close();
+
+ return 0;
+
+fail:
+ ext4fs_close();
+
+ return -1;
+}
diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
index cbdc220..dcb4151 100644
--- a/fs/ext4/ext4fs.c
+++ b/fs/ext4/ext4fs.c
@@ -45,8 +45,8 @@ void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot)
* Optimized read file API : collects and defers contiguous sector
* reads into one potentially more efficient larger sequential read action
*/
-int ext4fs_read_file(struct ext2fs_node *node, int pos,
- unsigned int len, char *buf)
+int ext4fs_read_file(struct ext2fs_node *node, loff_t pos,
+ loff_t len, char *buf, loff_t *actread)
{
struct ext_filesystem *fs = get_fs();
int i;
@@ -150,7 +150,8 @@ int ext4fs_read_file(struct ext2fs_node *node, int pos,
previous_block_number = -1;
}
- return len;
+ *actread = len;
+ return 0;
}
int ext4fs_ls(const char *dirname)
@@ -176,23 +177,31 @@ int ext4fs_ls(const char *dirname)
int ext4fs_exists(const char *filename)
{
- int file_len;
+ loff_t file_len;
+ int ret;
- file_len = ext4fs_open(filename);
- return file_len >= 0;
+ ret = ext4fs_open(filename, &file_len);
+ return ret == 0;
}
int ext4fs_size(const char *filename)
{
- return ext4fs_open(filename);
+ loff_t size;
+ int ret;
+
+ ret = ext4fs_open(filename, &size);
+ if (ret)
+ return ret;
+ else
+ return size;
}
-int ext4fs_read(char *buf, unsigned len)
+int ext4fs_read(char *buf, loff_t len, loff_t *actread)
{
if (ext4fs_root == NULL || ext4fs_file == NULL)
return 0;
- return ext4fs_read_file(ext4fs_file, 0, len, buf);
+ return ext4fs_read_file(ext4fs_file, 0, len, buf, actread);
}
int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
@@ -210,16 +219,17 @@ int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
int ext4_read_file(const char *filename, void *buf, int offset, int len)
{
- int file_len;
- int len_read;
+ loff_t file_len;
+ loff_t len_read;
+ int ret;
if (offset != 0) {
printf("** Cannot support non-zero offset **\n");
return -1;
}
- file_len = ext4fs_open(filename);
- if (file_len < 0) {
+ ret = ext4fs_open(filename, &file_len);
+ if (ret < 0) {
printf("** File not found %s **\n", filename);
return -1;
}
@@ -227,7 +237,10 @@ int ext4_read_file(const char *filename, void *buf, int offset, int len)
if (len == 0)
len = file_len;
- len_read = ext4fs_read(buf, len);
+ ret = ext4fs_read(buf, len, &len_read);
- return len_read;
+ if (ret)
+ return ret;
+ else
+ return len_read;
}
diff --git a/include/ext4fs.h b/include/ext4fs.h
index 6c419f3..66841e7 100644
--- a/include/ext4fs.h
+++ b/include/ext4fs.h
@@ -125,12 +125,14 @@ int ext4fs_init(void);
void ext4fs_deinit(void);
int ext4fs_filename_check(char *filename);
int ext4fs_write(const char *fname, unsigned char *buffer,
- unsigned long sizebytes);
+ unsigned long sizebytes);
+int ext4_write_file(const char *filename, void *buf, loff_t offset, loff_t len,
+ loff_t *actwrite);
#endif
struct ext_filesystem *get_fs(void);
-int ext4fs_open(const char *filename);
-int ext4fs_read(char *buf, unsigned len);
+int ext4fs_open(const char *filename, loff_t *len);
+int ext4fs_read(char *buf, loff_t len, loff_t *actread);
int ext4fs_mount(unsigned part_length);
void ext4fs_close(void);
void ext4fs_reinit_global(void);
--
1.8.3.1
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