From: Ferenc Wagner <wferi@niif.hu> To: Phillip Lougher <phillip@lougher.demon.co.uk>, Phillip Lougher <phillip.lougher@gmail.com>, linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, linux-embedded@vger.kernel.org Cc: Ferenc Wagner <wferi@niif.hu> Subject: [PATCH 0/3] RFC: direct MTD support for SquashFS Date: Tue, 30 Mar 2010 15:32:46 +0200 [thread overview] Message-ID: <1269955969-26123-1-git-send-email-wferi@niif.hu> (raw) In-Reply-To: <87mxxxltk6.fsf@tac.ki.iif.hu> Hi, Here is another, very different take on the subject. It isn't a real plugin system, but touches as little existing code as possible, and still quite easy to extend if needed. The MTD with LZMA case is somewhat challenged, as the current interface mismatch requires extra copying. It seems fairly easy to change the kernel decompressor interface to scatter/gather operation in the future, to do away with this. This patch does not consider SQUASHFS_METADATA_SIZE during buffer_head allocation in block.c, on the principle of hands-off. Extra question: does squashfs_put_super require BKL protection? Comments welcome. Regards, Feri. Ferenc Wagner (3): squashfs: parametrize decompressors on buffer_head operations squashfs: gather everything block device specific into block.c squashfs: add MTD backend fs/squashfs/Kconfig | 2 +- fs/squashfs/Makefile | 6 +- fs/squashfs/backend.c | 63 +++++++++++++++ fs/squashfs/backend.h | 12 +++ fs/squashfs/block.c | 42 +++++++--- fs/squashfs/decompressor.h | 8 +- fs/squashfs/lzma_wrapper.c | 11 ++- fs/squashfs/mtd.c | 179 ++++++++++++++++++++++++++++++++++++++++++++ fs/squashfs/squashfs.h | 22 +++++- fs/squashfs/super.c | 45 +++--------- fs/squashfs/zlib_wrapper.c | 13 ++-- 11 files changed, 337 insertions(+), 66 deletions(-) create mode 100644 fs/squashfs/backend.c create mode 100644 fs/squashfs/backend.h create mode 100644 fs/squashfs/mtd.c
WARNING: multiple messages have this Message-ID (diff)
From: Ferenc Wagner <wferi@niif.hu> To: Phillip Lougher <phillip@lougher.demon.co.uk>, Phillip Lougher <phillip.lougher@gmail.com>, linux-fsdevel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, Cc: Ferenc Wagner <wferi@niif.hu> Subject: [PATCH 0/3] RFC: direct MTD support for SquashFS Date: Tue, 30 Mar 2010 15:32:46 +0200 [thread overview] Message-ID: <1269955969-26123-1-git-send-email-wferi@niif.hu> (raw) In-Reply-To: <87mxxxltk6.fsf@tac.ki.iif.hu> Hi, Here is another, very different take on the subject. It isn't a real plugin system, but touches as little existing code as possible, and still quite easy to extend if needed. The MTD with LZMA case is somewhat challenged, as the current interface mismatch requires extra copying. It seems fairly easy to change the kernel decompressor interface to scatter/gather operation in the future, to do away with this. This patch does not consider SQUASHFS_METADATA_SIZE during buffer_head allocation in block.c, on the principle of hands-off. Extra question: does squashfs_put_super require BKL protection? Comments welcome. Regards, Feri. Ferenc Wagner (3): squashfs: parametrize decompressors on buffer_head operations squashfs: gather everything block device specific into block.c squashfs: add MTD backend fs/squashfs/Kconfig | 2 +- fs/squashfs/Makefile | 6 +- fs/squashfs/backend.c | 63 +++++++++++++++ fs/squashfs/backend.h | 12 +++ fs/squashfs/block.c | 42 +++++++--- fs/squashfs/decompressor.h | 8 +- fs/squashfs/lzma_wrapper.c | 11 ++- fs/squashfs/mtd.c | 179 ++++++++++++++++++++++++++++++++++++++++++++ fs/squashfs/squashfs.h | 22 +++++- fs/squashfs/super.c | 45 +++--------- fs/squashfs/zlib_wrapper.c | 13 ++-- 11 files changed, 337 insertions(+), 66 deletions(-) create mode 100644 fs/squashfs/backend.c create mode 100644 fs/squashfs/backend.h create mode 100644 fs/squashfs/mtd.c
next prev parent reply other threads:[~2010-03-30 14:21 UTC|newest] Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-03-16 13:38 RFC: direct MTD support for SquashFS Ferenc Wagner 2010-03-16 13:38 ` Ferenc Wagner 2010-03-16 14:26 ` Peter Korsgaard 2010-03-16 14:26 ` Peter Korsgaard 2010-03-16 19:18 ` Vitaly Wool 2010-03-16 19:18 ` Vitaly Wool 2010-03-16 19:18 ` Vitaly Wool 2010-03-18 16:38 ` Ferenc Wagner 2010-03-18 16:38 ` Ferenc Wagner 2010-03-18 16:38 ` Ferenc Wagner 2010-03-18 16:38 ` Ferenc Wagner 2010-03-18 21:40 ` Phillip Lougher 2010-03-18 21:40 ` Phillip Lougher 2010-03-18 22:52 ` Ferenc Wagner 2010-03-19 1:05 ` Ferenc Wagner 2010-03-19 7:30 ` Phillip Lougher 2010-03-19 14:12 ` Ferenc Wagner 2010-03-23 11:34 ` Ferenc Wagner 2010-03-23 11:34 ` Ferenc Wagner 2010-03-23 20:45 ` Ferenc Wagner 2010-03-23 20:47 ` Ferenc Wagner 2010-03-23 20:47 ` Ferenc Wagner 2010-03-24 5:23 ` Phillip Lougher 2010-03-24 5:23 ` Phillip Lougher 2010-03-24 6:35 ` Peter Korsgaard 2010-03-24 6:35 ` Peter Korsgaard 2010-03-24 11:28 ` Ferenc Wagner 2010-03-24 11:35 ` Peter Korsgaard 2010-03-24 13:48 ` Ferenc Wagner 2010-03-24 13:48 ` Ferenc Wagner 2010-03-30 13:32 ` [PATCH 0/3] " Ferenc Wagner 2010-03-30 13:32 ` Ferenc Wagner [this message] 2010-03-30 13:32 ` Ferenc Wagner 2010-03-31 6:35 ` Marco Stornelli 2010-03-31 6:35 ` Marco Stornelli 2010-03-30 13:32 ` [PATCH 1/3] squashfs: parametrize decompressors on buffer_head operations Ferenc Wagner 2010-03-30 13:32 ` Ferenc Wagner 2010-03-30 13:32 ` Ferenc Wagner 2010-03-30 13:32 ` [PATCH 2/3] squashfs: gather everything block device specific into block.c Ferenc Wagner 2010-03-30 13:32 ` Ferenc Wagner 2010-03-30 16:50 ` Ferenc Wagner 2010-03-30 16:50 ` Ferenc Wagner 2010-03-30 13:32 ` Ferenc Wagner 2010-03-30 13:32 ` [PATCH 3/3] squashfs: add MTD backend Ferenc Wagner 2010-03-30 13:32 ` Ferenc Wagner 2010-03-30 13:32 ` Ferenc Wagner
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