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* move asm/unaligned.h to linux/unaligned.hAl Viro2024-10-021-1/+1
| | | | | | | | | | | | | | | | | | | asm/unaligned.h is always an include of asm-generic/unaligned.h; might as well move that thing to linux/unaligned.h and include that - there's nothing arch-specific in that header. auto-generated by the following: for i in `git grep -l -w asm/unaligned.h`; do sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i done for i in `git grep -l -w asm-generic/unaligned.h`; do sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i done git mv include/asm-generic/unaligned.h include/linux/unaligned.h git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h
* f2fs: get rid of page->indexChao Yu2024-09-061-1/+2
| | | | | | | | | | | | Convert to use folio, so that we can get rid of 'page->index' to prepare for removal of 'index' field in structure page [1]. [1] https://lore.kernel.org/all/Zp8fgUSIBGQ1TN0D@casper.infradead.org/ Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Chao Yu <chao@kernel.org> Reviewed-by: Li Zetao <lizetao1@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: convert f2fs_clear_page_cache_dirty_tag() to use folioChao Yu2024-09-061-1/+1
| | | | | | | | | | | Convert to use folio, so that we can get rid of 'page->index' to prepare for removal of 'index' field in structure page [1]. [1] https://lore.kernel.org/all/Zp8fgUSIBGQ1TN0D@casper.infradead.org/ Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: prevent possible int overflow in dir_block_index()Nikita Zhandarovich2024-08-051-1/+2
| | | | | | | | | | | | | | | | | | | The result of multiplication between values derived from functions dir_buckets() and bucket_blocks() *could* technically reach 2^30 * 2^2 = 2^32. While unlikely to happen, it is prudent to ensure that it will not lead to integer overflow. Thus, use mul_u32_u32() as it's more appropriate to mitigate the issue. Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE. Fixes: 3843154598a0 ("f2fs: introduce large directory support") Cc: stable@vger.kernel.org Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: Reuse generic_ci_match for ci comparisonsGabriel Krisman Bertazi2024-06-071-54/+4
| | | | | | | | | | | | | Now that ci_match is part of libfs, make f2fs reuse it instead of having a different implementation. Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com> Link: https://lore.kernel.org/r/20240606073353.47130-6-eugen.hristev@collabora.com Reviewed-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Chao Yu <chao@kernel.org> Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de> Signed-off-by: Christian Brauner <brauner@kernel.org>
* f2fs: Simplify the handling of cached casefolded namesGabriel Krisman Bertazi2024-06-071-23/+30
| | | | | | | | | | | | Keeping it as qstr avoids the unnecessary conversion in f2fs_match Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> [eugen.hristev@collabora.com: port to 6.10-rc1 and minor changes] Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com> Link: https://lore.kernel.org/r/20240606073353.47130-3-eugen.hristev@collabora.com Reviewed-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de> Signed-off-by: Christian Brauner <brauner@kernel.org>
* f2fs: fix to create selinux label during whiteout initializationChao Yu2024-02-271-2/+3
| | | | | | | | | | | | | | | | | | | | | | | generic/700 - output mismatch (see /media/fstests/results//generic/700.out.bad) --- tests/generic/700.out 2023-03-28 10:40:42.735529223 +0000 +++ /media/fstests/results//generic/700.out.bad 2024-02-06 04:37:56.000000000 +0000 @@ -1,2 +1,4 @@ QA output created by 700 +/mnt/scratch_f2fs/f1: security.selinux: No such attribute +/mnt/scratch_f2fs/f2: security.selinux: No such attribute Silence is golden ... (Run 'diff -u /media/fstests/tests/generic/700.out /media/fstests/results//generic/700.out.bad' to see the entire diff) HINT: You _MAY_ be missing kernel fix: 70b589a37e1a xfs: add selinux labels to whiteout inodes Previously, it missed to create selinux labels during whiteout inode initialization, fix this issue. Fixes: 7e01e7ad746b ("f2fs: support RENAME_WHITEOUT") Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: support printk_ratelimited() in f2fs_printk()Chao Yu2024-02-051-3/+2
| | | | | | | | | This patch supports using printk_ratelimited() in f2fs_printk(), and wrap ratelimited f2fs_printk() into f2fs_{err,warn,info}_ratelimited(), then, use these new helps to clean up codes. Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: convert to new timestamp accessorsJeff Layton2023-10-181-3/+3
| | | | | | | | Convert to using the new inode timestamp accessor functions. Signed-off-by: Jeff Layton <jlayton@kernel.org> Link: https://lore.kernel.org/r/20231004185347.80880-34-jlayton@kernel.org Signed-off-by: Christian Brauner <brauner@kernel.org>
* f2fs: convert to ctime accessor functionsJeff Layton2023-07-241-4/+4
| | | | | | | | | | | In later patches, we're going to change how the inode's ctime field is used. Switch to using accessor functions instead of raw accesses of inode->i_ctime. Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> Message-Id: <20230705190309.579783-41-jlayton@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>
* f2fs: fix deadlock in i_xattr_sem and inode page lockJaegeuk Kim2023-06-301-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Thread #1: [122554.641906][ T92] f2fs_getxattr+0xd4/0x5fc -> waiting for f2fs_down_read(&F2FS_I(inode)->i_xattr_sem); [122554.641927][ T92] __f2fs_get_acl+0x50/0x284 [122554.641948][ T92] f2fs_init_acl+0x84/0x54c [122554.641969][ T92] f2fs_init_inode_metadata+0x460/0x5f0 [122554.641990][ T92] f2fs_add_inline_entry+0x11c/0x350 -> Locked dir->inode_page by f2fs_get_node_page() [122554.642009][ T92] f2fs_do_add_link+0x100/0x1e4 [122554.642025][ T92] f2fs_create+0xf4/0x22c [122554.642047][ T92] vfs_create+0x130/0x1f4 Thread #2: [123996.386358][ T92] __get_node_page+0x8c/0x504 -> waiting for dir->inode_page lock [123996.386383][ T92] read_all_xattrs+0x11c/0x1f4 [123996.386405][ T92] __f2fs_setxattr+0xcc/0x528 [123996.386424][ T92] f2fs_setxattr+0x158/0x1f4 -> f2fs_down_write(&F2FS_I(inode)->i_xattr_sem); [123996.386443][ T92] __f2fs_set_acl+0x328/0x430 [123996.386618][ T92] f2fs_set_acl+0x38/0x50 [123996.386642][ T92] posix_acl_chmod+0xc8/0x1c8 [123996.386669][ T92] f2fs_setattr+0x5e0/0x6bc [123996.386689][ T92] notify_change+0x4d8/0x580 [123996.386717][ T92] chmod_common+0xd8/0x184 [123996.386748][ T92] do_fchmodat+0x60/0x124 [123996.386766][ T92] __arm64_sys_fchmodat+0x28/0x3c Cc: <stable@vger.kernel.org> Fixes: 27161f13e3c3 "f2fs: avoid race in between read xattr & write xattr" Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: remove folio_detach_private() in .invalidate_folio and .release_folioChao Yu2023-04-171-5/+1
| | | | | | | | | | We have maintain PagePrivate and page_private and page reference w/ {set,clear}_page_private_*, it doesn't need to call folio_detach_private() in the end of .invalidate_folio and .release_folio, remove it and use f2fs_bug_on instead. Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: use common implementation of file typeWeizhao Ouyang2023-04-101-36/+3
| | | | | | | | Use common implementation of file type conversion helpers. Signed-off-by: Weizhao Ouyang <o451686892@gmail.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: convert to use bitmap APIYangtao Li2023-03-291-1/+1
| | | | | | | | Let's use BIT() and GENMASK() instead of open it. Signed-off-by: Yangtao Li <frank.li@vivo.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: merge f2fs_show_injection_info() into time_to_inject()Yangtao Li2023-01-111-3/+1
| | | | | | | | | | | | | | | There is no need to additionally use f2fs_show_injection_info() to output information. Concatenate time_to_inject() and __time_to_inject() via a macro. In the new __time_to_inject() function, pass in the caller function name and parent function. In this way, we no longer need the f2fs_show_injection_info() function, and let's remove it. Suggested-by: Chao Yu <chao@kernel.org> Signed-off-by: Yangtao Li <frank.li@vivo.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: change type for 'sbi->readdir_ra'Yuwei Guan2022-11-281-1/+1
| | | | | | | | | Before this patch, the varibale 'readdir_ra' takes effect if it's equal to '1' or not, so we can change type for it from 'int' to 'bool'. Signed-off-by: Yuwei Guan <Yuwei.Guan@zeekrlife.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: optimize iteration over sparse directoriesChao Yu2022-11-111-10/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Wei Chen reports a kernel bug as blew: INFO: task syz-executor.0:29056 blocked for more than 143 seconds. Not tainted 5.15.0-rc5 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:14632 pid:29056 ppid: 6574 flags:0x00000004 Call Trace: __schedule+0x4a1/0x1720 schedule+0x36/0xe0 rwsem_down_write_slowpath+0x322/0x7a0 fscrypt_ioctl_set_policy+0x11f/0x2a0 __f2fs_ioctl+0x1a9f/0x5780 f2fs_ioctl+0x89/0x3a0 __x64_sys_ioctl+0xe8/0x140 do_syscall_64+0x34/0xb0 entry_SYSCALL_64_after_hwframe+0x44/0xae Eric did some investigation on this issue, quoted from reply of Eric: "Well, the quality of this bug report has a lot to be desired (not on upstream kernel, reproducer is full of totally irrelevant stuff, not sent to the mailing list of the filesystem whose disk image is being fuzzed, etc.). But what is going on is that f2fs_empty_dir() doesn't consider the case of a directory with an extremely large i_size on a malicious disk image. Specifically, the reproducer mounts an f2fs image with a directory that has an i_size of 14814520042850357248, then calls FS_IOC_SET_ENCRYPTION_POLICY on it. That results in a call to f2fs_empty_dir() to check whether the directory is empty. f2fs_empty_dir() then iterates through all 3616826182336513 blocks the directory allegedly contains to check whether any contain anything. i_rwsem is held during this, so anything else that tries to take it will hang." In order to solve this issue, let's use f2fs_get_next_page_offset() to speed up iteration by skipping holes for all below functions: - f2fs_empty_dir - f2fs_readdir - find_in_level The way why we can speed up iteration was described in 'commit 3cf4574705b4 ("f2fs: introduce get_next_page_offset to speed up SEEK_DATA")'. Meanwhile, in f2fs_empty_dir(), let's use f2fs_find_data_page() instead f2fs_get_lock_data_page(), due to i_rwsem was held in caller of f2fs_empty_dir(), there shouldn't be any races, so it's fine to not lock dentry page during lookuping dirents in the page. Link: https://lore.kernel.org/lkml/536944df-a0ae-1dd8-148f-510b476e1347@kernel.org/T/ Reported-by: Wei Chen <harperchen1110@gmail.com> Cc: Eric Biggers <ebiggers@google.com> Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: support recording errors into superblockChao Yu2022-10-041-0/+1
| | | | | | | | This patch supports to record detail reason of FSCORRUPTED error into f2fs_super_block.s_errors[]. Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: don't use casefolded comparison for "." and ".."Eric Biggers2022-05-171-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Tryng to rename a directory that has all following properties fails with EINVAL and triggers the 'WARN_ON_ONCE(!fscrypt_has_encryption_key(dir))' in f2fs_match_ci_name(): - The directory is casefolded - The directory is encrypted - The directory's encryption key is not yet set up - The parent directory is *not* encrypted The problem is incorrect handling of the lookup of ".." to get the parent reference to update. fscrypt_setup_filename() treats ".." (and ".") specially, as it's never encrypted. It's passed through as-is, and setting up the directory's key is not attempted. As the name isn't a no-key name, f2fs treats it as a "normal" name and attempts a casefolded comparison. That breaks the assumption of the WARN_ON_ONCE() in f2fs_match_ci_name() which assumes that for encrypted directories, casefolded comparisons only happen when the directory's key is set up. We could just remove this WARN_ON_ONCE(). However, since casefolding is always a no-op on "." and ".." anyway, let's instead just not casefold these names. This results in the standard bytewise comparison. Fixes: 7ad08a58bf67 ("f2fs: Handle casefolding with Encryption") Cc: <stable@vger.kernel.org> # v5.11+ Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Gabriel Krisman Bertazi <krisman@collabora.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* Merge tag 'f2fs-for-5.18' of ↵Linus Torvalds2022-03-221-6/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "In this cycle, f2fs has some performance improvements for Android workloads such as using read-unfair rwsems and adding some sysfs entries to control GCs and discard commands in more details. In addtiion, it has some tunings to improve the recovery speed after sudden power-cut. Enhancement: - add reader-unfair rwsems with F2FS_UNFAIR_RWSEM: will replace with generic API support - adjust to make the readahead/recovery flow more efficiently - sysfs entries to control issue speeds of GCs and Discard commands - enable idmapped mounts Bug fix: - correct wrong error handling routines - fix missing conditions in quota - fix a potential deadlock between writeback and block plug routines - fix a deadlock btween freezefs and evict_inode We've added some boundary checks to avoid kernel panics on corrupted images, and several minor code clean-ups" * tag 'f2fs-for-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (27 commits) f2fs: fix to do sanity check on .cp_pack_total_block_count f2fs: make gc_urgent and gc_segment_mode sysfs node readable f2fs: use aggressive GC policy during f2fs_disable_checkpoint() f2fs: fix compressed file start atomic write may cause data corruption f2fs: initialize sbi->gc_mode explicitly f2fs: introduce gc_urgent_mid mode f2fs: compress: fix to print raw data size in error path of lz4 decompression f2fs: remove redundant parameter judgment f2fs: use spin_lock to avoid hang f2fs: don't get FREEZE lock in f2fs_evict_inode in frozen fs f2fs: remove unnecessary read for F2FS_FITS_IN_INODE f2fs: introduce F2FS_UNFAIR_RWSEM to support unfair rwsem f2fs: avoid an infinite loop in f2fs_sync_dirty_inodes f2fs: fix to do sanity check on curseg->alloc_type f2fs: fix to avoid potential deadlock f2fs: quota: fix loop condition at f2fs_quota_sync() f2fs: Restore rwsem lockdep support f2fs: fix missing free nid in f2fs_handle_failed_inode f2fs: support idmapped mounts f2fs: add a way to limit roll forward recovery time ...
| * f2fs: move f2fs to use reader-unfair rwsemsTim Murray2022-01-241-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | f2fs rw_semaphores work better if writers can starve readers, especially for the checkpoint thread, because writers are strictly more important than reader threads. This prevents significant priority inversion between low-priority readers that blocked while trying to acquire the read lock and a second acquisition of the write lock that might be blocking high priority work. Signed-off-by: Tim Murray <timmurray@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* | unicode: clean up the Kconfig symbol confusionChristoph Hellwig2022-01-201-5/+5
|/ | | | | | | | | | | | | | | Turn the CONFIG_UNICODE symbol into a tristate that generates some always built in code and remove the confusing CONFIG_UNICODE_UTF8_DATA symbol. Note that a lot of the IS_ENABLED() checks could be turned from cpp statements into normal ifs, but this change is intended to be fairly mechanic, so that should be cleaned up later. Fixes: 2b3d04787012 ("unicode: Add utf8-data module") Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Reviewed-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
* f2fs: support fault injection for f2fs_kmem_cache_alloc()Chao Yu2021-08-171-2/+2
| | | | | | | | | | | This patch supports to inject fault into f2fs_kmem_cache_alloc(). Usage: a) echo 32768 > /sys/fs/f2fs/<dev>/inject_type or b) mount -o fault_type=32768 <dev> <mountpoint> Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: reduce the scope of setting fsck tag when de->name_len is zeroYangtao Li2021-08-041-5/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I recently found a case where de->name_len is 0 in f2fs_fill_dentries() easily reproduced, and finally set the fsck flag. Thread A Thread B - f2fs_readdir - f2fs_read_inline_dir - ctx->pos = d.max - f2fs_add_dentry - f2fs_add_inline_entry - do_convert_inline_dir - f2fs_add_regular_entry - f2fs_readdir - f2fs_fill_dentries - set_sbi_flag(sbi, SBI_NEED_FSCK) Process A opens the folder, and has been reading without closing it. During this period, Process B created a file under the folder (occupying multiple f2fs_dir_entry, exceeding the d.max of the inline dir). After creation, process A uses the d.max of inline dir to read it again, and it will read that de->name_len is 0. And Chao pointed out that w/o inline conversion, the race condition still can happen as below: dir_entry1: A dir_entry2: B dir_entry3: C free slot: _ ctx->pos: ^ Thread A is traversing directory, ctx-pos moves to below position after readdir() by thread A: AAAABBBB___ ^ Then thread B delete dir_entry2, and create dir_entry3. Thread A calls readdir() to lookup dirents starting from middle of new dirent slots as below: AAAACCCCCC_ ^ In these scenarios, the file system is not damaged, and it's hard to avoid it. But we can bypass tagging FSCK flag if: a) bit_pos (:= ctx->pos % d->max) is non-zero and b) before bit_pos moves to first valid dir_entry. Fixes: ddf06b753a85 ("f2fs: fix to trigger fsck if dirent.name_len is zero") Signed-off-by: Yangtao Li <frank.li@vivo.com> [Chao: clean up description] Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: introduce f2fs_casefolded_name slab cacheChao Yu2021-06-231-6/+11
| | | | | | | | | Add a slab cache: "f2fs_casefolded_name" for memory allocation of casefold name. Reviewed-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: restructure f2fs page.private layoutChao Yu2021-05-141-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Restruct f2fs page private layout for below reasons: There are some cases that f2fs wants to set a flag in a page to indicate a specified status of page: a) page is in transaction list for atomic write b) page contains dummy data for aligned write c) page is migrating for GC d) page contains inline data for inline inode flush e) page belongs to merkle tree, and is verified for fsverity f) page is dirty and has filesystem/inode reference count for writeback g) page is temporary and has decompress io context reference for compression There are existed places in page structure we can use to store f2fs private status/data: - page.flags: PG_checked, PG_private - page.private However it was a mess when we using them, which may cause potential confliction: page.private PG_private PG_checked page._refcount (+1 at most) a) -1 set +1 b) -2 set c), d), e) set f) 0 set +1 g) pointer set The other problem is page.flags has no free slot, if we can avoid set zero to page.private and set PG_private flag, then we use non-zero value to indicate PG_private status, so that we may have chance to reclaim PG_private slot for other usage. [1] The other concern is f2fs has bad scalability in aspect of indicating more page status. So in this patch, let's restructure f2fs' page.private as below to solve above issues: Layout A: lowest bit should be 1 | bit0 = 1 | bit1 | bit2 | ... | bit MAX | private data .... | bit 0 PAGE_PRIVATE_NOT_POINTER bit 1 PAGE_PRIVATE_ATOMIC_WRITE bit 2 PAGE_PRIVATE_DUMMY_WRITE bit 3 PAGE_PRIVATE_ONGOING_MIGRATION bit 4 PAGE_PRIVATE_INLINE_INODE bit 5 PAGE_PRIVATE_REF_RESOURCE bit 6- f2fs private data Layout B: lowest bit should be 0 page.private is a wrapped pointer. After the change: page.private PG_private PG_checked page._refcount (+1 at most) a) 11 set +1 b) 101 set +1 c) 1001 set +1 d) 10001 set +1 e) set f) 100001 set +1 g) pointer set +1 [1] https://lore.kernel.org/linux-f2fs-devel/20210422154705.GO3596236@casper.infradead.org/T/#u Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* Merge tag 'f2fs-for-5.13-rc1' of ↵Linus Torvalds2021-05-041-0/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "In this round, we added a new mount option, "checkpoint_merge", which introduces a kernel thread dealing with the f2fs checkpoints. Once we start to manage the IO priority along with blk-cgroup, the checkpoint operation can be processed in a lower priority under the process context. Since the checkpoint holds all the filesystem operations, we give a higher priority to the checkpoint thread all the time. Enhancements: - introduce gc_merge mount option to introduce a checkpoint thread - improve to run discard thread efficiently - allow modular compression algorithms - expose # of overprivision segments to sysfs - expose runtime compression stat to sysfs Bug fixes: - fix OOB memory access by the node id lookup - avoid touching checkpointed data in the checkpoint-disabled mode - fix the resizing flow to avoid kernel panic and race conditions - fix block allocation issues on pinned files - address some swapfile issues - fix hugtask problem and kernel panic during atomic write operations - don't start checkpoint thread in RO And, we've cleaned up some kernel coding style and build warnings. In addition, we fixed some minor race conditions and error handling routines" * tag 'f2fs-for-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (48 commits) f2fs: drop inplace IO if fs status is abnormal f2fs: compress: remove unneed check condition f2fs: clean up left deprecated IO trace codes f2fs: avoid using native allocate_segment_by_default() f2fs: remove unnecessary struct declaration f2fs: fix to avoid NULL pointer dereference f2fs: avoid duplicated codes for cleanup f2fs: document: add description about compressed space handling f2fs: clean up build warnings f2fs: fix the periodic wakeups of discard thread f2fs: fix to avoid accessing invalid fio in f2fs_allocate_data_block() f2fs: fix to avoid GC/mmap race with f2fs_truncate() f2fs: set checkpoint_merge by default f2fs: Fix a hungtask problem in atomic write f2fs: fix to restrict mount condition on readonly block device f2fs: introduce gc_merge mount option f2fs: fix to cover __allocate_new_section() with curseg_lock f2fs: fix wrong alloc_type in f2fs_do_replace_block f2fs: delete empty compress.h f2fs: fix a typo in inode.c ...
| * f2fs: clean up build warningsYi Zhuang2021-04-101-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch combined the below three clean-up patches. - modify open brace '{' following function definitions - ERROR: spaces required around that ':' - ERROR: spaces required before the open parenthesis '(' - ERROR: spaces prohibited before that ',' - Made suggested modifications from checkpatch in reference to WARNING: Missing a blank line after declarations Signed-off-by: Yi Zhuang <zhuangyi1@huawei.com> Signed-off-by: Jia Yang <jiayang5@huawei.com> Signed-off-by: Jack Qiu <jack.qiu@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* | useful constants: struct qstr for ".."Al Viro2021-04-151-3/+1
|/ | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge tag 'f2fs-for-5.11-rc1' of ↵Linus Torvalds2020-12-171-29/+76
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "In this round, we've made more work into per-file compression support. For example, F2FS_IOC_GET | SET_COMPRESS_OPTION provides a way to change the algorithm or cluster size per file. F2FS_IOC_COMPRESS | DECOMPRESS_FILE provides a way to compress and decompress the existing normal files manually. There is also a new mount option, compress_mode=fs|user, which can control who compresses the data. Chao also added a checksum feature with a mount option so that we are able to detect any corrupted cluster. In addition, Daniel contributed casefolding with encryption patch, which will be used for Android devices. Summary: Enhancements: - add ioctls and mount option to manage per-file compression feature - support casefolding with encryption - support checksum for compressed cluster - avoid IO starvation by replacing mutex with rwsem - add sysfs, max_io_bytes, to control max bio size Bug fixes: - fix use-after-free issue when compression and fsverity are enabled - fix consistency corruption during fault injection test - fix data offset for lseek - get rid of buffer_head which has 32bits limit in fiemap - fix some bugs in multi-partitions support - fix nat entry count calculation in shrinker - fix some stat information And, we've refactored some logics and fix minor bugs as well" * tag 'f2fs-for-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (36 commits) f2fs: compress: fix compression chksum f2fs: fix shift-out-of-bounds in sanity_check_raw_super() f2fs: fix race of pending_pages in decompression f2fs: fix to account inline xattr correctly during recovery f2fs: inline: fix wrong inline inode stat f2fs: inline: correct comment in f2fs_recover_inline_data f2fs: don't check PAGE_SIZE again in sanity_check_raw_super() f2fs: convert to F2FS_*_INO macro f2fs: introduce max_io_bytes, a sysfs entry, to limit bio size f2fs: don't allow any writes on readonly mount f2fs: avoid race condition for shrinker count f2fs: add F2FS_IOC_DECOMPRESS_FILE and F2FS_IOC_COMPRESS_FILE f2fs: add compress_mode mount option f2fs: Remove unnecessary unlikely() f2fs: init dirty_secmap incorrectly f2fs: remove buffer_head which has 32bits limit f2fs: fix wrong block count instead of bytes f2fs: use new conversion functions between blks and bytes f2fs: rename logical_to_blk and blk_to_logical f2fs: fix kbytes written stat for multi-device case ...
| * f2fs: Handle casefolding with EncryptionDaniel Rosenberg2020-12-021-22/+76
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Expand f2fs's casefolding support to include encrypted directories. To index casefolded+encrypted directories, we use the SipHash of the casefolded name, keyed by a key derived from the directory's fscrypt master key. This ensures that the dirhash doesn't leak information about the plaintext filenames. Encryption keys are unavailable during roll-forward recovery, so we can't compute the dirhash when recovering a new dentry in an encrypted + casefolded directory. To avoid having to force a checkpoint when a new file is fsync'ed, store the dirhash on-disk appended to i_name. This patch incorporates work by Eric Biggers <ebiggers@google.com> and Jaegeuk Kim <jaegeuk@kernel.org>. Co-developed-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Daniel Rosenberg <drosen@google.com> Reviewed-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| * fscrypt: Have filesystems handle their d_opsDaniel Rosenberg2020-12-021-7/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This shifts the responsibility of setting up dentry operations from fscrypt to the individual filesystems, allowing them to have their own operations while still setting fscrypt's d_revalidate as appropriate. Most filesystems can just use generic_set_encrypted_ci_d_ops, unless they have their own specific dentry operations as well. That operation will set the minimal d_ops required under the circumstances. Since the fscrypt d_ops are set later on, we must set all d_ops there, since we cannot adjust those later on. This should not result in any change in behavior. Signed-off-by: Daniel Rosenberg <drosen@google.com> Acked-by: Theodore Ts'o <tytso@mit.edu> Acked-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* | fscrypt: introduce fscrypt_prepare_readdir()Eric Biggers2020-12-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The last remaining use of fscrypt_get_encryption_info() from filesystems is for readdir (->iterate_shared()). Every other call is now in fs/crypto/ as part of some other higher-level operation. We need to add a new argument to fscrypt_get_encryption_info() to indicate whether the encryption policy is allowed to be unrecognized or not. Doing this is easier if we can work with high-level operations rather than direct filesystem use of fscrypt_get_encryption_info(). So add a function fscrypt_prepare_readdir() which wraps the call to fscrypt_get_encryption_info() for the readdir use case. Reviewed-by: Andreas Dilger <adilger@dilger.ca> Link: https://lore.kernel.org/r/20201203022041.230976-6-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* | f2fs: remove f2fs_dir_open()Eric Biggers2020-12-021-8/+0
|/ | | | | | | | | | | | | | Since encrypted directories can be opened and searched without their key being available, and each readdir and ->lookup() tries to set up the key, trying to set up the key in ->open() too isn't really useful. Just remove it so that directories don't need an ->open() method anymore, and so that we eliminate a use of fscrypt_get_encryption_info() (which I'd like to stop exporting to filesystems). Reviewed-by: Chao Yu <yuchao0@huawei.com> Link: https://lore.kernel.org/r/20201203022041.230976-3-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* Merge tag 'f2fs-for-5.10-rc1' of ↵Linus Torvalds2020-10-161-91/+18
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "In this round, we've added new features such as zone capacity for ZNS and a new GC policy, ATGC, along with in-memory segment management. In addition, we could improve the decompression speed significantly by changing virtual mapping method. Even though we've fixed lots of small bugs in compression support, I feel that it becomes more stable so that I could give it a try in production. Enhancements: - suport zone capacity in NVMe Zoned Namespace devices - introduce in-memory current segment management - add standart casefolding support - support age threshold based garbage collection - improve decompression speed by changing virtual mapping method Bug fixes: - fix condition checks in some ioctl() such as compression, move_range, etc - fix 32/64bits support in data structures - fix memory allocation in zstd decompress - add some boundary checks to avoid kernel panic on corrupted image - fix disallowing compression for non-empty file - fix slab leakage of compressed block writes In addition, it includes code refactoring for better readability and minor bug fixes for compression and zoned device support" * tag 'f2fs-for-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (51 commits) f2fs: code cleanup by removing unnecessary check f2fs: wait for sysfs kobject removal before freeing f2fs_sb_info f2fs: fix writecount false positive in releasing compress blocks f2fs: introduce check_swap_activate_fast() f2fs: don't issue flush in f2fs_flush_device_cache() for nobarrier case f2fs: handle errors of f2fs_get_meta_page_nofail f2fs: fix to set SBI_NEED_FSCK flag for inconsistent inode f2fs: reject CASEFOLD inode flag without casefold feature f2fs: fix memory alignment to support 32bit f2fs: fix slab leak of rpages pointer f2fs: compress: fix to disallow enabling compress on non-empty file f2fs: compress: introduce cic/dic slab cache f2fs: compress: introduce page array slab cache f2fs: fix to do sanity check on segment/section count f2fs: fix to check segment boundary during SIT page readahead f2fs: fix uninit-value in f2fs_lookup f2fs: remove unneeded parameter in find_in_block() f2fs: fix wrong total_sections check and fsmeta check f2fs: remove duplicated code in sanity_check_area_boundary f2fs: remove unused check on version_bitmap ...
| * f2fs: fix uninit-value in f2fs_lookupChao Yu2020-09-291-5/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As syzbot reported: Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:122 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:219 f2fs_lookup+0xe05/0x1a80 fs/f2fs/namei.c:503 lookup_open fs/namei.c:3082 [inline] open_last_lookups fs/namei.c:3177 [inline] path_openat+0x2729/0x6a90 fs/namei.c:3365 do_filp_open+0x2b8/0x710 fs/namei.c:3395 do_sys_openat2+0xa88/0x1140 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_compat_sys_openat fs/open.c:1242 [inline] __se_compat_sys_openat+0x2a4/0x310 fs/open.c:1240 __ia32_compat_sys_openat+0x56/0x70 fs/open.c:1240 do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline] __do_fast_syscall_32+0x129/0x180 arch/x86/entry/common.c:139 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c In f2fs_lookup(), @res_page could be used before being initialized, because in __f2fs_find_entry(), once F2FS_I(dir)->i_current_depth was been fuzzed to zero, then @res_page will never be initialized, causing this kmsan warning, relocating @res_page initialization place to fix this bug. Reported-by: syzbot+0eac6f0bbd558fd866d7@syzkaller.appspotmail.com Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| * f2fs: remove unneeded parameter in find_in_block()Chao Yu2020-09-291-11/+6
| | | | | | | | | | | | | | | | We can relocate @res_page assignment in find_in_block() to its caller, so unneeded parameter could be removed for cleanup. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| * f2fs: Use generic casefolding supportDaniel Rosenberg2020-09-101-75/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | This switches f2fs over to the generic support provided in the previous patch. Since casefolded dentries behave the same in ext4 and f2fs, we decrease the maintenance burden by unifying them, and any optimizations will immediately apply to both. Signed-off-by: Daniel Rosenberg <drosen@google.com> Reviewed-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* | fscrypt: don't call no-key names "ciphertext names"Eric Biggers2020-09-231-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we're using the term "ciphertext name" ambiguously because it can mean either the actual ciphertext filename, or the encoded filename that is shown when an encrypted directory is listed without its key. The latter we're now usually calling the "no-key name"; and while it's derived from the ciphertext name, it's not the same thing. To avoid this ambiguity, rename fscrypt_name::is_ciphertext_name to fscrypt_name::is_nokey_name, and update comments that say "ciphertext name" (or "encrypted name") to say "no-key name" instead when warranted. Link: https://lore.kernel.org/r/20200924042624.98439-2-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* | f2fs: use fscrypt_prepare_new_inode() and fscrypt_set_context()Eric Biggers2020-09-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert f2fs to use the new functions fscrypt_prepare_new_inode() and fscrypt_set_context(). This avoids calling fscrypt_get_encryption_info() from under f2fs_lock_op(), which can deadlock because fscrypt_get_encryption_info() isn't GFP_NOFS-safe. For more details about this problem, see the earlier patch "fscrypt: add fscrypt_prepare_new_inode() and fscrypt_set_context()". This also fixes a f2fs-specific deadlock when the filesystem is mounted with '-o test_dummy_encryption' and a file is created in an unencrypted directory other than the root directory: INFO: task touch:207 blocked for more than 30 seconds. Not tainted 5.9.0-rc4-00099-g729e3d0919844 #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:touch state:D stack: 0 pid: 207 ppid: 167 flags:0x00000000 Call Trace: [...] lock_page include/linux/pagemap.h:548 [inline] pagecache_get_page+0x25e/0x310 mm/filemap.c:1682 find_or_create_page include/linux/pagemap.h:348 [inline] grab_cache_page include/linux/pagemap.h:424 [inline] f2fs_grab_cache_page fs/f2fs/f2fs.h:2395 [inline] f2fs_grab_cache_page fs/f2fs/f2fs.h:2373 [inline] __get_node_page.part.0+0x39/0x2d0 fs/f2fs/node.c:1350 __get_node_page fs/f2fs/node.c:35 [inline] f2fs_get_node_page+0x2e/0x60 fs/f2fs/node.c:1399 read_inline_xattr+0x88/0x140 fs/f2fs/xattr.c:288 lookup_all_xattrs+0x1f9/0x2c0 fs/f2fs/xattr.c:344 f2fs_getxattr+0x9b/0x160 fs/f2fs/xattr.c:532 f2fs_get_context+0x1e/0x20 fs/f2fs/super.c:2460 fscrypt_get_encryption_info+0x9b/0x450 fs/crypto/keysetup.c:472 fscrypt_inherit_context+0x2f/0xb0 fs/crypto/policy.c:640 f2fs_init_inode_metadata+0xab/0x340 fs/f2fs/dir.c:540 f2fs_add_inline_entry+0x145/0x390 fs/f2fs/inline.c:621 f2fs_add_dentry+0x31/0x80 fs/f2fs/dir.c:757 f2fs_do_add_link+0xcd/0x130 fs/f2fs/dir.c:798 f2fs_add_link fs/f2fs/f2fs.h:3234 [inline] f2fs_create+0x104/0x290 fs/f2fs/namei.c:344 lookup_open.isra.0+0x2de/0x500 fs/namei.c:3103 open_last_lookups+0xa9/0x340 fs/namei.c:3177 path_openat+0x8f/0x1b0 fs/namei.c:3365 do_filp_open+0x87/0x130 fs/namei.c:3395 do_sys_openat2+0x96/0x150 fs/open.c:1168 [...] That happened because f2fs_add_inline_entry() locks the directory inode's page in order to add the dentry, then f2fs_get_context() tries to lock it recursively in order to read the encryption xattr. This problem is specific to "test_dummy_encryption" because normally the directory's fscrypt_info would be set up prior to f2fs_add_inline_entry() in order to encrypt the new filename. Regardless, the new design fixes this test_dummy_encryption deadlock as well as potential deadlocks with fs reclaim, by setting up any needed fscrypt_info structs prior to taking so many locks. The test_dummy_encryption deadlock was reported by Daniel Rosenberg. Reported-by: Daniel Rosenberg <drosen@google.com> Acked-by: Jaegeuk Kim <jaegeuk@kernel.org> Link: https://lore.kernel.org/r/20200917041136.178600-5-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* | fscrypt: drop unused inode argument from fscrypt_fname_alloc_bufferJeff Layton2020-09-071-1/+1
|/ | | | | | Signed-off-by: Jeff Layton <jlayton@kernel.org> Link: https://lore.kernel.org/r/20200810142139.487631-1-jlayton@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* f2fs: fix typo in comment of f2fs_do_add_linkLiu Song2020-07-071-1/+1
| | | | | | | | stakable/stackable Signed-off-by: Liu Song <fishland@aliyun.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: avoid utf8_strncasecmp() with unstable nameEric Biggers2020-06-081-0/+16
| | | | | | | | | | | | | | | | | | | | If the dentry name passed to ->d_compare() fits in dentry::d_iname, then it may be concurrently modified by a rename. This can cause undefined behavior (possibly out-of-bounds memory accesses or crashes) in utf8_strncasecmp(), since fs/unicode/ isn't written to handle strings that may be concurrently modified. Fix this by first copying the filename to a stack buffer if needed. This way we get a stable snapshot of the filename. Fixes: 2c2eb7a300cd ("f2fs: Support case-insensitive file name lookups") Cc: <stable@vger.kernel.org> # v5.4+ Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Daniel Rosenberg <drosen@google.com> Cc: Gabriel Krisman Bertazi <krisman@collabora.co.uk> Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: rework filename handlingEric Biggers2020-05-111-136/+174
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rework f2fs's handling of filenames to use a new 'struct f2fs_filename'. Similar to 'struct ext4_filename', this stores the usr_fname, disk_name, dirhash, crypto_buf, and casefolded name. Some of these names can be NULL in some cases. 'struct f2fs_filename' differs from 'struct fscrypt_name' mainly in that the casefolded name is included. For user-initiated directory operations like lookup() and create(), initialize the f2fs_filename by translating the corresponding fscrypt_name, then computing the dirhash and casefolded name if needed. This makes the dirhash and casefolded name be cached for each syscall, so we don't have to recompute them repeatedly. (Previously, f2fs computed the dirhash once per directory level, and the casefolded name once per directory block.) This improves performance. This rework also makes it much easier to correctly handle all combinations of normal, encrypted, casefolded, and encrypted+casefolded directories. (The fourth isn't supported yet but is being worked on.) The only other cases where an f2fs_filename gets initialized are for two filesystem-internal operations: (1) when converting an inline directory to a regular one, we grab the needed disk_name and hash from an existing f2fs_dir_entry; and (2) when roll-forward recovering a new dentry, we grab the needed disk_name from f2fs_inode::i_name and compute the hash. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: split f2fs_d_compare() from f2fs_match_name()Eric Biggers2020-05-111-35/+35
| | | | | | | | | | | | | | | | Sharing f2fs_ci_compare() between comparing cached dentries (f2fs_d_compare()) and comparing on-disk dentries (f2fs_match_name()) doesn't work as well as intended, as these actions fundamentally differ in several ways (e.g. whether the task may sleep, whether the directory is stable, whether the casefolded name was precomputed, whether the dentry will need to be decrypted once we allow casefold+encrypt, etc.) Just make f2fs_d_compare() implement what it needs directly, and rework f2fs_ci_compare() to be specialized for f2fs_match_name(). Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: clean up f2fs_may_encrypt()Chao Yu2020-03-301-3/+1
| | | | | | | | | | | | Merge below two conditions into f2fs_may_encrypt() for cleanup - IS_ENCRYPTED() - DUMMY_ENCRYPTION_ENABLED() Check IS_ENCRYPTED(inode) condition in f2fs_init_inode_metadata() is enough since we have already set encrypt flag in f2fs_new_inode(). Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* f2fs: don't change inode status under page lockChao Yu2020-03-301-6/+6
| | | | | | | In order to shrink page lock coverage. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
* Merge tag 'f2fs-for-5.6' of ↵Linus Torvalds2020-01-301-4/+21
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "In this series, we've implemented transparent compression experimentally. It supports LZO and LZ4, but will add more later as we investigate in the field more. At this point, the feature doesn't expose compressed space to user directly in order to guarantee potential data updates later to the space. Instead, the main goal is to reduce data writes to flash disk as much as possible, resulting in extending disk life time as well as relaxing IO congestion. Alternatively, we're also considering to add ioctl() to reclaim compressed space and show it to user after putting the immutable bit. Enhancements: - add compression support - avoid unnecessary locks in quota ops - harden power-cut scenario for zoned block devices - use private bio_set to avoid IO congestion - replace GC mutex with rwsem to serialize callers Bug fixes: - fix dentry consistency and memory corruption in rename()'s error case - fix wrong swap extent reports - fix casefolding bugs - change lock coverage to avoid deadlock - avoid GFP_KERNEL under f2fs_lock_op And, we've cleaned up sysfs entries to prepare no debugfs" * tag 'f2fs-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (31 commits) f2fs: fix race conditions in ->d_compare() and ->d_hash() f2fs: fix dcache lookup of !casefolded directories f2fs: Add f2fs stats to sysfs f2fs: delete duplicate information on sysfs nodes f2fs: change to use rwsem for gc_mutex f2fs: update f2fs document regarding to fsync_mode f2fs: add a way to turn off ipu bio cache f2fs: code cleanup for f2fs_statfs_project() f2fs: fix miscounted block limit in f2fs_statfs_project() f2fs: show the CP_PAUSE reason in checkpoint traces f2fs: fix deadlock allocating bio_post_read_ctx from mempool f2fs: remove unneeded check for error allocating bio_post_read_ctx f2fs: convert inline_dir early before starting rename f2fs: fix memleak of kobject f2fs: fix to add swap extent correctly f2fs: run fsck when getting bad inode during GC f2fs: support data compression f2fs: free sysfs kobject f2fs: declare nested quota_sem and remove unnecessary sems f2fs: don't put new_page twice in f2fs_rename ...
| * f2fs: fix race conditions in ->d_compare() and ->d_hash()Eric Biggers2020-01-241-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since ->d_compare() and ->d_hash() can be called in RCU-walk mode, ->d_parent and ->d_inode can be concurrently modified, and in particular, ->d_inode may be changed to NULL. For f2fs_d_hash() this resulted in a reproducible NULL dereference if a lookup is done in a directory being deleted, e.g. with: int main() { if (fork()) { for (;;) { mkdir("subdir", 0700); rmdir("subdir"); } } else { for (;;) access("subdir/file", 0); } } ... or by running the 't_encrypted_d_revalidate' program from xfstests. Both repros work in any directory on a filesystem with the encoding feature, even if the directory doesn't actually have the casefold flag. I couldn't reproduce a crash in f2fs_d_compare(), but it appears that a similar crash is possible there. Fix these bugs by reading ->d_parent and ->d_inode using READ_ONCE() and falling back to the case sensitive behavior if the inode is NULL. Reported-by: Al Viro <viro@zeniv.linux.org.uk> Fixes: 2c2eb7a300cd ("f2fs: Support case-insensitive file name lookups") Cc: <stable@vger.kernel.org> # v5.4+ Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| * f2fs: fix dcache lookup of !casefolded directoriesEric Biggers2020-01-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Do the name comparison for non-casefolded directories correctly. This is analogous to ext4's commit 66883da1eee8 ("ext4: fix dcache lookup of !casefolded directories"). Fixes: 2c2eb7a300cd ("f2fs: Support case-insensitive file name lookups") Cc: <stable@vger.kernel.org> # v5.4+ Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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