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Date: Fri, 25 May 2018 21:13:38 -0600
From: Andreas Dilger <adilger@...ger.ca>
To: Artem Blagodarenko <artem.blagodarenko@...il.com>
Cc: linux-ext4@...r.kernel.org
Subject: Re: [PATCH v4 1/4] ext2fs: opening filesystem code refactoring
On May 25, 2018, at 6:42 AM, Artem Blagodarenko <artem.blagodarenko@...il.com> wrote:
>
> There are similar opening filesystem code in different utilities.
>
> The patch moves this code to ext2fs_try_open_fs().
I think the patch is fine, but this comment is not consistent with the
actual patch. It is moving the improved handling *from* try_open_fs()
into ext2fs_open().
> This function make one of the action based on parameters:
> 1) open filesystem with given superblock, superblock size
> 2) open filesystem with given superblock, but try to
> find right block size
> 3) open filesystem with default superblock and block size
>
> Signed-off-by: Artem Blagodarenko <artem.blagodarenko@...il.com>
Aside from minor whitespace and comment cleanup, you can add:
Reviewed-by: Andreas Dilger <adilger@...ger.ca>
> ---
> e2fsck/unix.c | 28 +++-------------------------
> lib/ext2fs/openfs.c | 36 +++++++++++++++++++++++++++++++++++-
> misc/dumpe2fs.c | 17 +++--------------
> 3 files changed, 41 insertions(+), 40 deletions(-)
>
> diff --git a/e2fsck/unix.c b/e2fsck/unix.c
> index cbe5ec50..491e9eb6 100644
> --- a/e2fsck/unix.c
> +++ b/e2fsck/unix.c
> @@ -1142,31 +1142,9 @@ static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
> ext2_filsys *ret_fs)
> {
> errcode_t retval;
> -
> - *ret_fs = NULL;
> - if (ctx->superblock && ctx->blocksize) {
> - retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
> - flags, ctx->superblock, ctx->blocksize,
> - io_ptr, ret_fs);
> - } else if (ctx->superblock) {
> - int blocksize;
> - for (blocksize = EXT2_MIN_BLOCK_SIZE;
> - blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
> - if (*ret_fs) {
> - ext2fs_free(*ret_fs);
> - *ret_fs = NULL;
> - }
> - retval = ext2fs_open2(ctx->filesystem_name,
> - ctx->io_options, flags,
> - ctx->superblock, blocksize,
> - io_ptr, ret_fs);
> - if (!retval)
> - break;
> - }
> - } else
> - retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
> - flags, 0, 0, io_ptr, ret_fs);
> -
> + retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
> + flags, ctx->superblock, ctx->blocksize,
> + io_ptr, ret_fs);
> if (retval == 0) {
> (*ret_fs)->priv_data = ctx;
> e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
> diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
> index 532e70f7..d18e1ad2 100644
> --- a/lib/ext2fs/openfs.c
> +++ b/lib/ext2fs/openfs.c
> @@ -108,7 +108,7 @@ errcode_t ext2fs_open(const char *name, int flags, int superblock,
> * EXT2_FLAG_64BITS - Allow 64-bit bitfields (needed for large
> * filesystems)
> */
> -errcode_t ext2fs_open2(const char *name, const char *io_options,
> +static errcode_t __ext2fs_open2(const char *name, const char *io_options,
> int flags, int superblock,
> unsigned int block_size, io_manager manager,
> ext2_filsys *ret_fs)
> @@ -504,6 +504,40 @@ cleanup:
> return retval;
> }
>
> +errcode_t ext2fs_open2(const char *name, const char *io_options,
> + int flags, int superblock,
> + unsigned int block_size, io_manager manager,
> + ext2_filsys *ret_fs)
> +{
> + errcode_t retval;
> +
> + *ret_fs = NULL;
> + if (superblock && block_size) {
> + retval = __ext2fs_open2(name, io_options,
> + flags, superblock, block_size,
(style) align after '(' on previous line
> + manager, ret_fs);
> + } else if (superblock) {
> + int block_size;
> +
> + for (block_size = EXT2_MIN_BLOCK_SIZE;
> + block_size <= EXT2_MAX_BLOCK_SIZE; block_size *= 2) {
> + if (*ret_fs) {
> + ext2fs_free(*ret_fs);
> + *ret_fs = NULL;
> + }
> + retval = __ext2fs_open2(name,
> + io_options, flags,
(style) align after '(' on previous line
> + superblock, block_size,
> + manager, ret_fs);
> + if (!retval)
> + break;
> + }
> + } else
> + retval = __ext2fs_open2(name, io_options,
> + flags, 0, 0, manager, ret_fs);
(style) align after '(' on previous line
(style) consistent {} around all branches of if/else block
> + return retval;
> +}
> +
> /*
> * Set/get the filesystem data I/O channel.
> *
> diff --git a/misc/dumpe2fs.c b/misc/dumpe2fs.c
> index 395ea9ee..6c4d7965 100644
> --- a/misc/dumpe2fs.c
> +++ b/misc/dumpe2fs.c
> @@ -568,20 +568,9 @@ int main (int argc, char ** argv)
> if (image_dump)
> flags |= EXT2_FLAG_IMAGE_FILE;
> try_open_again:
> - if (use_superblock && !use_blocksize) {
> - for (use_blocksize = EXT2_MIN_BLOCK_SIZE;
> - use_blocksize <= EXT2_MAX_BLOCK_SIZE;
> - use_blocksize *= 2) {
> - retval = ext2fs_open (device_name, flags,
> - use_superblock,
> - use_blocksize, unix_io_manager,
> - &fs);
> - if (!retval)
> - break;
> - }
> - } else
> - retval = ext2fs_open (device_name, flags, use_superblock,
> - use_blocksize, unix_io_manager, &fs);
> + retval = ext2fs_open2(device_name, 0,
> + flags, use_superblock, use_blocksize,
> + unix_io_manager, &fs);
> if (retval && !(flags & EXT2_FLAG_IGNORE_CSUM_ERRORS)) {
> flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
> goto try_open_again;
> --
> 2.14.3
>
Cheers, Andreas
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