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path: root/fs/ext4/Makefile
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* ext4: move sysfs code from super.c to fs/ext4/sysfs.cTheodore Ts'o2015-09-231-1/+1
| | | | | | | | Also statically allocate the ext4_kset and ext4_feat objects, since we only need exactly one of each, and it's simpler and less code if we drop the dynamic allocation and deallocation when it's not needed. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4 crypto: filename encryption facilitiesMichael Halcrow2015-04-121-1/+2
| | | | | | | Signed-off-by: Uday Savagaonkar <savagaon@google.com> Signed-off-by: Ildar Muslukhov <ildarm@google.com> Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4 crypto: add encryption key management facilitiesMichael Halcrow2015-04-121-1/+1
| | | | | | Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Ildar Muslukhov <muslukhovi@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4 crypto: add ext4 encryption facilitiesMichael Halcrow2015-04-121-1/+1
| | | | | | | | | | | | | | | | | | | | On encrypt, we will re-assign the buffer_heads to point to a bounce page rather than the control_page (which is the original page to write that contains the plaintext). The block I/O occurs against the bounce page. On write completion, we re-assign the buffer_heads to the original plaintext page. On decrypt, we will attach a read completion callback to the bio struct. This read completion will decrypt the read contents in-place prior to setting the page up-to-date. The current encryption mode, AES-256-XTS, lacks cryptographic integrity. AES-256-GCM is in-plan, but we will need to devise a mechanism for handling the integrity data. Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Ildar Muslukhov <ildarm@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4 crypto: add encryption policy and password salt supportMichael Halcrow2015-04-111-0/+1
| | | | | | | Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Ildar Muslukhov <muslukhovi@gmail.com>
* ext4 crypto: add ext4_mpage_readpages()Theodore Ts'o2015-04-081-1/+1
| | | | | | | | This takes code from fs/mpage.c and optimizes it for ext4. Its primary reason is to allow us to more easily add encryption to ext4's read path in an efficient manner. Signed-off-by: Theodore Ts'o <tytso@mit.edu>
* ext4: Remove CONFIG_EXT4_FS_XATTRTao Ma2012-12-101-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | Ted has sent out a RFC about removing this feature. Eric and Jan confirmed that both RedHat and SUSE enable this feature in all their product. David also said that "As far as I know, it's enabled in all Android kernels that use ext4." So it seems OK for us. And what's more, as inline data depends its implementation on xattr, and to be frank, I don't run any test again inline data enabled while xattr disabled. So I think we should add inline data and remove this config option in the same release. [ The savings if you disable CONFIG_EXT4_FS_XATTR is only 27k, which isn't much in the grand scheme of things. Since no one seems to be testing this configuration except for some automated compile farms, on balance we are better removing this config option, and so that it is effectively always enabled. -- tytso ] Cc: David Brown <davidb@codeaurora.org> Cc: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: add the basic function for inline data supportTao Ma2012-12-101-1/+1
| | | | | | | | | | | Implement inline data with xattr. Now we use "system.data" to store xattr, and the xattr will be extended if the i_size is increased while we don't release the space during truncate. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: add operations on extent status treeZheng Liu2012-11-081-1/+1
| | | | | | | | | | | This patch adds operations on a extent status tree. CC: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com> Signed-off-by: Allison Henderson <achender@linux.vnet.ibm.com> Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: move ext4_ind_* functions from inode.c to indirect.cAmir Goldstein2011-06-271-1/+1
| | | | | | | | | This patch moves functions from inode.c to indirect.c. The moved functions are ext4_ind_* functions and their helpers. Functions called from inode.c are declared extern. Signed-off-by: Amir Goldstein <amir73il@users.sf.net> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: add support for multiple mount protectionJohann Lombardi2011-05-241-1/+2
| | | | | | | | | | | | | | Prevent an ext4 filesystem from being mounted multiple times. A sequence number is stored on disk and is periodically updated (every 5 seconds by default) by a mounted filesystem. At mount time, we now wait for s_mmp_update_interval seconds to make sure that the MMP sequence does not change. In case of failure, the nodename, bdevname and the time at which the MMP block was last updated is displayed. Signed-off-by: Andreas Dilger <adilger@whamcloud.com> Signed-off-by: Johann Lombardi <johann@whamcloud.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: use bio layer instead of buffer layer in mpage_da_submit_ioTheodore Ts'o2010-10-271-1/+1
| | | | | | | | | Call the block I/O layer directly instad of going through the buffer layer. This should give us much better performance and scalability, as well as lowering our CPU utilization when doing buffered writeback. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: online defrag -- Add EXT4_IOC_MOVE_EXT ioctlAkira Fujita2009-06-171-1/+1
| | | | | | | | | | | | The EXT4_IOC_MOVE_EXT exchanges the blocks between orig_fd and donor_fd, and then write the file data of orig_fd to donor_fd. ext4_mext_move_extent() is the main fucntion of ext4 online defrag, and this patch includes all functions related to ext4 online defrag. Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com> Signed-off-by: Takashi Sato <t-sato@yk.jp.nec.com> Signed-off-by: Kazuya Mio <k-mio@sx.jp.nec.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: Add a comprehensive block validity check to ext4_get_blocks()Theodore Ts'o2009-05-171-2/+2
| | | | | | | | | | | | | | | To catch filesystem bugs or corruption which could lead to the filesystem getting severly damaged, this patch adds a facility for tracking all of the filesystem metadata blocks by contiguous regions in a red-black tree. This allows quick searching of the tree to locate extents which might overlap with filesystem metadata blocks. This facility is also used by the multi-block allocator to assure that it is not allocating blocks out of the system zone, as well as by the routines used when reading indirect blocks and extents information from disk to make sure their contents are valid. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: Rename ext4dev to ext4Theodore Ts'o2008-10-101-5/+5
| | | | | | | | The ext4 filesystem is getting stable enough that it's time to drop the "dev" prefix. Also remove the requirement for the TEST_FILESYS flag. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: Add multi block allocator for ext4Alex Tomas2008-01-291-1/+1
| | | | | | | | Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: Andreas Dilger <adilger@clusterfs.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
* ext4: Add EXT4_IOC_MIGRATE ioctlAneesh Kumar K.V2008-01-281-1/+1
| | | | | | | The below patch add ioctl for migrating ext3 indirect block mapped inode to ext4 extent mapped inode. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* [PATCH] ext4: uninline large functionsAndrew Morton2006-12-071-1/+2
| | | | | | | | | Saves nearly 4kbytes on x86. Cc: Arnaldo Carvalho de Melo <acme@mandriva.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ext3: add extent map supportAlex Tomas2006-10-111-1/+1
| | | | | | | | | | | | | | | | | | | On disk extents format: /* * this is extent on-disk structure * it's used at the bottom of the tree */ struct ext3_extent { __le32 ee_block; /* first logical block extent covers */ __le16 ee_len; /* number of blocks covered by extent */ __le16 ee_start_hi; /* high 16 bits of physical block */ __le32 ee_start; /* low 32 bigs of physical block */ }; Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ext4: rename ext4 symbols to avoid duplication of ext3 symbolsMingming Cao2006-10-111-6/+6
| | | | | | | | | | Mingming Cao originally did this work, and Shaggy reproduced it using some scripts from her. Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ext4: initial copy of files from ext3Dave Kleikamp2006-10-111-0/+12
Start of the ext4 patch series. See Documentation/filesystems/ext4.txt for details. This is a simple copy of the files in fs/ext3 to fs/ext4 and /usr/incude/linux/ext3* to /usr/include/ex4* Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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