Changes in super.c

a7624ccd - ext2: Make ext2_params_spec static

Wed, 26 Feb 2025 16:57:51 +0000

ext2: Make ext2_params_spec staticIt isn't used outside of fs/ext2/super.c.Reported-by: kernel test robot Fixes: eab61d3260d7 ("ext2: convert to the new mount API")Signed-off-by: Jan Kara List of files: /linux-6.15/fs/ext2/super.c

98f18c76 - ext2: create ext2_msg_fc for use during parsing

Sun, 23 Feb 2025 19:57:41 +0000

ext2: create ext2_msg_fc for use during parsingRather than send a NULL sb to ext2_msg, which omits the s_id frommessages, create a new ext2_msg_fc which is able to provide thisinformation from the filesystem context *fc when parsing.Signed-off-by: Eric Sandeen Signed-off-by: Jan Kara Link: https://patch.msgid.link/20250223201014.7541-3-sandeen@redhat.com List of files: /linux-6.15/fs/ext2/super.c

eab61d32 - ext2: convert to the new mount API

Sun, 23 Feb 2025 19:57:40 +0000

ext2: convert to the new mount APIConvert ext2 to the new mount API.Note that this makes the sb= option more accepting than it was before;previosly, sb= was only accepted if it was the first specified option.Now it can exist anywhere, and if respecified, the last specified valueis used.Parse-time messages here are sent to ext2_msg with a NULL sb, andext2_msg is adjusted to accept that, as ext4 does today as well.Signed-off-by: Eric Sandeen Signed-off-by: Jan Kara Link: https://patch.msgid.link/20250223201014.7541-2-sandeen@redhat.com List of files: /linux-6.15/fs/ext2/super.c

ef51934a - ext2: Remove reference to bh->b_page

Thu, 13 Feb 2025 18:20:43 +0000

ext2: Remove reference to bh->b_pageBuffer heads are attached to folios, not to pages. Alsoflush_dcache_page() is now deprecated in favour of flush_dcache_folio().Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Jan Kara Link: https://patch.msgid.link/20250213182045.2131356-1-willy@infradead.org List of files: /linux-6.15/fs/ext2/super.c

f88c3fb8 - mm, slab: remove last vestiges of SLAB_MEM_SPREAD

Wed, 13 Mar 2024 03:32:19 +0000

mm, slab: remove last vestiges of SLAB_MEM_SPREADYes, yes, I know the slab people were planning on going slow and lettingevery subsystem fight this thing on their own. But let's just rip offthe band-aid and get it over and done with. I don't want to see anumber of unnecessary pull requests just to get rid of a flag that nolonger has any meaning.This was mainly done with a couple of 'sed' scripts and then some manualcleanup of the end result.Link: https://lore.kernel.org/all/CAHk-=wji0u+OOtmAOD-5JV3SXcRJF___k_+8XNKmak0yd5vW1Q@mail.gmail.com/Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/ext2/super.c

0d5fb772 - ext2: remove SLAB_MEM_SPREAD flag usage

Sat, 24 Feb 2024 13:48:16 +0000

ext2: remove SLAB_MEM_SPREAD flag usageThe SLAB_MEM_SPREAD flag is already a no-op after removal of SLABallocator and in [1] it was fully deprecated. Remove its usage so we candelete it from slab. No functional change.Signed-off-by: Chengming Zhou Signed-off-by: Jan Kara Link: https://lore.kernel.org/all/20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz/Message-Id: <20240224134816.829424-1-chengming.zhou@linux.dev> List of files: /linux-6.15/fs/ext2/super.c

ccb49011 - quota: Properly annotate i_dquot arrays with __rcu

Tue, 06 Feb 2024 14:08:19 +0000

quota: Properly annotate i_dquot arrays with __rcuDquots pointed to from i_dquot arrays in inodes are protected bydquot_srcu. Annotate them as such and change .get_dquots callback toreturn properly annotated pointer to make sparse happy.Fixes: b9ba6f94b238 ("quota: remove dqptr_sem")Signed-off-by: Jan Kara List of files: /linux-6.15/fs/ext2/super.c

e21fc203 - exportfs: make ->encode_fh() a mandatory method for NFS export

Mon, 23 Oct 2023 18:07:59 +0000

exportfs: make ->encode_fh() a mandatory method for NFS exportRename the default helper for encoding FILEID_INO32_GEN* file handles togeneric_encode_ino32_fh() and convert the filesystems that used thedefault implementation to use the generic helper explicitly.After this change, exportfs_encode_inode_fh() no longer has a defaultimplementation to encode FILEID_INO32_GEN* file handles.This is a step towards allowing filesystems to encode non-decodeablefile handles for fanotify without having to implement anyexport_operations.Reviewed-by: Jan Kara Reviewed-by: Jeff Layton Acked-by: Chuck Lever Signed-off-by: Amir Goldstein Link: https://lore.kernel.org/r/20231023180801.2953446-3-amir73il@gmail.comAcked-by: Dave Kleikamp Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner List of files: /linux-6.15/fs/ext2/super.c

5cdc59fc - ext2: convert to new timestamp accessors

Wed, 04 Oct 2023 18:52:19 +0000

ext2: convert to new timestamp accessorsConvert to using the new inode timestamp accessor functions.Signed-off-by: Jeff Layton Link: https://lore.kernel.org/r/20231004185347.80880-32-jlayton@kernel.orgSigned-off-by: Christian Brauner List of files: /linux-6.15/fs/ext2/super.c

fc4eed64 - ext2: convert to ctime accessor functions

Wed, 05 Jul 2023 19:01:06 +0000

ext2: convert to ctime accessor functionsIn later patches, we're going to change how the inode's ctime field isused. Switch to using accessor functions instead of raw accesses ofinode->i_ctime.Signed-off-by: Jeff Layton Reviewed-by: Jan Kara Message-Id: <20230705190309.579783-39-jlayton@kernel.org>Signed-off-by: Christian Brauner List of files: /linux-6.15/fs/ext2/super.c

404615d7 - ext2: Drop fragment support

Tue, 13 Jun 2023 10:25:52 +0000

ext2: Drop fragment supportExt2 has fields in superblock reserved for subblock allocation support.However that never landed. Drop the many years dead code.Reported-by: syzbot+af5e10f73dbff48f70af@syzkaller.appspotmail.comSigned-off-by: Jan Kara List of files: /linux-6.15/fs/ext2/super.c

62aeb944 - ext2: Check block size validity during mount

Wed, 01 Mar 2023 10:59:39 +0000

ext2: Check block size validity during mountCheck that log of block size stored in the superblock has sensiblevalue. Otherwise the shift computing the block size can overflow leadingto undefined behavior.Reported-by: syzbot+4fec412f59eba8c01b77@syzkaller.appspotmail.comSigned-off-by: Jan Kara List of files: /linux-6.15/fs/ext2/super.c

b41b98e1 - fs/ext2: Fix code indentation

Mon, 28 Nov 2022 12:05:49 +0000

fs/ext2: Fix code indentationts=4 can cause misunderstanding in code reading. It is better to replace8 spaces with one tab.Signed-off-by: Rong Tao Signed-off-by: Jan Kara List of files: /linux-6.15/fs/ext2/super.c

e7c7fbb9 - ext2: Use kvmalloc() for group descriptor array

Wed, 14 Sep 2022 15:29:33 +0000

ext2: Use kvmalloc() for group descriptor arrayArray of group descriptor block buffers can get rather large. In theoryin can reach 1MB for perfectly valid filesystem and even more formaliciously crafted ones. Use kvmalloc() to allocate the array to avoidstraining memory allocator with large order allocations unnecessarily.Reported-by: syzbot+0f2f7e65a3007d39539f@syzkaller.appspotmail.comSigned-off-by: Jan Kara List of files: /linux-6.15/fs/ext2/super.c

d766f2d1 - ext2: Add sanity checks for group and filesystem size

Wed, 14 Sep 2022 15:24:42 +0000

ext2: Add sanity checks for group and filesystem sizeAdd sanity check that filesystem size does not exceed the underlyingdevice size and that group size is big enough so that metadata can fitinto it. This avoid trying to mount some crafted filesystems withextremely large group counts.Reported-by: syzbot+0f2f7e65a3007d39539f@syzkaller.appspotmail.comReported-by: kernel test robot # Test fixupCC: stable@vger.kernel.orgSigned-off-by: Jan Kara List of files: /linux-6.15/fs/ext2/super.c

0cc5b4ce - ext2: remove nobh support

Mon, 13 Jun 2022 05:37:11 +0000

ext2: remove nobh supportThe nobh mode is an obscure feature to save lowlevel for large memory32-bit configurations while trading for much slower performance andhas been long obsolete. Remove it.Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Signed-off-by: Matthew Wilcox (Oracle) List of files: /linux-6.15/fs/ext2/super.c

fa78f336 - ext2: Add more validity checks for inode counts

Tue, 26 Jul 2022 11:13:50 +0000

ext2: Add more validity checks for inode countsAdd checks verifying number of inodes stored in the superblock matchesthe number computed from number of inodes per group. Also verify we haveat least one block worth of inodes per group. This prevents crashes oncorrupted filesystems.Reported-by: syzbot+d273f7d7f58afd93be48@syzkaller.appspotmail.comSigned-off-by: Jan Kara List of files: /linux-6.15/fs/ext2/super.c

8012b866 - dax: introduce holder for dax_device

Fri, 03 Jun 2022 05:37:25 +0000

dax: introduce holder for dax_devicePatch series "v14 fsdax-rmap + v11 fsdax-reflink", v2.The patchset fsdax-rmap is aimed to support shared pages tracking forfsdax.It moves owner tracking from dax_assocaite_entry() to pmem device driver,by introducing an interface ->memory_failure() for struct pagemap. Thisinterface is called by memory_failure() in mm, and implemented by pmemdevice.Then call holder operations to find the filesystem which the corrupteddata located in, and call filesystem handler to track files or metadataassociated with this page.Finally we are able to try to fix the corrupted data in filesystem and doother necessary processing, such as killing processes who are using thefiles affected.The call trace is like this:memory_failure()|* fsdax case|------------|pgmap->ops->memory_failure() => pmem_pgmap_memory_failure()| dax_holder_notify_failure() =>| dax_device->holder_ops->notify_failure() =>| - xfs_dax_notify_failure()| |* xfs_dax_notify_failure()| |--------------------------| | xfs_rmap_query_range()| | xfs_dax_failure_fn()| | * corrupted on metadata| | try to recover data, call xfs_force_shutdown()| | * corrupted on file data| | try to recover data, call mf_dax_kill_procs()|* normal case|-------------|mf_generic_kill_procs()The patchset fsdax-reflink attempts to add CoW support for fsdax, andtakes XFS, which has both reflink and fsdax features, as an example.One of the key mechanisms needed to be implemented in fsdax is CoW. Copythe data from srcmap before we actually write data to the destinationiomap. And we just copy range in which data won't be changed.Another mechanism is range comparison. In page cache case, readpage() isused to load data on disk to page cache in order to be able to comparedata. In fsdax case, readpage() does not work. So, we need anothercompare data with direct access support.With the two mechanisms implemented in fsdax, we are able to make reflinkand fsdax work together in XFS.This patch (of 14):To easily track filesystem from a pmem device, we introduce a holder fordax_device structure, and also its operation. This holder is used toremember who is using this dax_device: - When it is the backend of a filesystem, the holder will be the instance of this filesystem. - When this pmem device is one of the targets in a mapped device, the holder will be this mapped device. In this case, the mapped device has its own dax_device and it will follow the first rule. So that we can finally track to the filesystem we needed.The holder and holder_ops will be set when filesystem is being mounted,or an target device is being activated.Link: https://lkml.kernel.org/r/20220603053738.1218681-1-ruansy.fnst@fujitsu.comLink: https://lkml.kernel.org/r/20220603053738.1218681-2-ruansy.fnst@fujitsu.comSigned-off-by: Shiyang Ruan Reviewed-by: Christoph Hellwig Reviewed-by: Dan Williams Reviewed-by: Darrick J. Wong Cc: Dave Chinner Cc: Jane Chu Cc: Goldwyn Rodrigues Cc: Al Viro Cc: Matthew Wilcox Cc: Naoya Horiguchi Cc: Miaohe Lin Cc: Dan Williams Cc: Goldwyn Rodrigues Cc: Ritesh Harjani Signed-off-by: Andrew Morton List of files: /linux-6.15/fs/ext2/super.c

9888725d - fs/ext2: replace ternary operator with min_t()

Thu, 14 Jul 2022 06:33:18 +0000

fs/ext2: replace ternary operator with min_t()Fix the following coccicheck warning:fs/ext2/super.c:1494: WARNING opportunity for min().fs/ext2/super.c:1533: WARNING opportunity for min().min_t() macro is defined in include/linux/minmax.h. It avoidsmultiple evaluations of the arguments when non-constant and performsstrict type-checking.Link: https://lore.kernel.org/r/20220714063318.1777139-1-13667453960@163.comSigned-off-by: Jiangshan Yi Signed-off-by: Jan Kara List of files: /linux-6.15/fs/ext2/super.c

fd60b288 - fs: allocate inode by using alloc_inode_sb()

Tue, 22 Mar 2022 21:41:03 +0000

fs: allocate inode by using alloc_inode_sb()The inode allocation is supposed to use alloc_inode_sb(), so convertkmem_cache_alloc() of all filesystems to alloc_inode_sb().Link: https://lkml.kernel.org/r/20220228122126.37293-5-songmuchun@bytedance.comSigned-off-by: Muchun Song Acked-by: Theodore Ts'o [ext4]Acked-by: Roman Gushchin Cc: Alex Shi Cc: Anna Schumaker Cc: Chao Yu Cc: Dave Chinner Cc: Fam Zheng Cc: Jaegeuk Kim Cc: Johannes Weiner Cc: Kari Argillander Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Qi Zheng Cc: Shakeel Butt Cc: Trond Myklebust Cc: Vladimir Davydov Cc: Vlastimil Babka Cc: Wei Yang Cc: Xiongchun Duan Cc: Yang Shi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/ext2/super.c