There is no need to modify the buffer passed to ext4fs_write_file(). The memset() call is not required here and was likely copied from the equivalent part of the ext4fs_read_file() function where we do need it.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com
---
Changes in v3: - reworded commit log
Changes in v2: None
fs/ext4/ext4_common.c | 2 +- fs/ext4/ext4_common.h | 2 +- fs/ext4/ext4_write.c | 11 +++++------ include/ext4fs.h | 2 +- 4 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c index 67e2471bd3..b881482c39 100644 --- a/fs/ext4/ext4_common.c +++ b/fs/ext4/ext4_common.c @@ -190,7 +190,7 @@ uint32_t ext4fs_div_roundup(uint32_t size, uint32_t n) return res; }
-void put_ext4(uint64_t off, void *buf, uint32_t size) +void put_ext4(u64 off, const void *buf, u32 size) { uint64_t startblock; uint64_t remainder; diff --git a/fs/ext4/ext4_common.h b/fs/ext4/ext4_common.h index 1ee81ab7ce..50155eccfc 100644 --- a/fs/ext4/ext4_common.h +++ b/fs/ext4/ext4_common.h @@ -72,7 +72,7 @@ int ext4fs_iget(int inode_no, struct ext2_inode *inode); void ext4fs_allocate_blocks(struct ext2_inode *file_inode, unsigned int total_remaining_blocks, unsigned int *total_no_of_block); -void put_ext4(uint64_t off, void *buf, uint32_t size); +void put_ext4(u64 off, const void *buf, u32 size); struct ext2_block_group *ext4fs_get_group_descriptor (const struct ext_filesystem *fs, uint32_t bg_idx); uint64_t ext4fs_bg_get_block_id(const struct ext2_block_group *bg, diff --git a/fs/ext4/ext4_write.c b/fs/ext4/ext4_write.c index 1de29236f0..51ca1c0916 100644 --- a/fs/ext4/ext4_write.c +++ b/fs/ext4/ext4_write.c @@ -752,7 +752,7 @@ void ext4fs_deinit(void) * contigous sectors as ext4fs_read_file */ static int ext4fs_write_file(struct ext2_inode *file_inode, - int pos, unsigned int len, char *buf) + int pos, unsigned int len, const char *buf) { int i; int blockcnt; @@ -764,7 +764,7 @@ static int ext4fs_write_file(struct ext2_inode *file_inode, int delayed_start = 0; int delayed_extent = 0; int delayed_next = 0; - char *delayed_buf = NULL; + const char *delayed_buf = NULL;
/* Adjust len so it we can't read past the end of the file. */ if (len > filesize) @@ -816,7 +816,6 @@ static int ext4fs_write_file(struct ext2_inode *file_inode, (uint32_t) delayed_extent); previous_block_number = -1; } - memset(buf, 0, fs->blksz - skipfirst); } buf += fs->blksz - skipfirst; } @@ -830,8 +829,8 @@ static int ext4fs_write_file(struct ext2_inode *file_inode, return len; }
-int ext4fs_write(const char *fname, unsigned char *buffer, - unsigned long sizebytes) +int ext4fs_write(const char *fname, const char *buffer, + unsigned long sizebytes) { int ret = 0; struct ext2_inode *file_inode = NULL; @@ -950,7 +949,7 @@ int ext4fs_write(const char *fname, unsigned char *buffer, if (ext4fs_put_metadata(temp_ptr, itable_blkno)) goto fail; /* copy the file content into data blocks */ - if (ext4fs_write_file(file_inode, 0, sizebytes, (char *)buffer) == -1) { + if (ext4fs_write_file(file_inode, 0, sizebytes, buffer) == -1) { printf("Error in copying content\n"); /* FIXME: Deallocate data blocks */ goto fail; diff --git a/include/ext4fs.h b/include/ext4fs.h index bcf440364e..d4dcefaa96 100644 --- a/include/ext4fs.h +++ b/include/ext4fs.h @@ -128,7 +128,7 @@ extern int gindex; int ext4fs_init(void); void ext4fs_deinit(void); int ext4fs_filename_unlink(char *filename); -int ext4fs_write(const char *fname, unsigned char *buffer, +int ext4fs_write(const char *fname, const char *buffer, unsigned long sizebytes); int ext4_write_file(const char *filename, void *buf, loff_t offset, loff_t len, loff_t *actwrite);