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2020-01-21erofs: clean up z_erofs_submit_queue()Gao Xiang
A label and extra variables will be eliminated, which is more cleaner. Link: https://lore.kernel.org/r/20200121064819.139469-1-gaoxiang25@huawei.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2020-01-21erofs: fold in postsubmit_is_all_bypassed()Gao Xiang
No need to introduce such separated helper since cache strategy compile configs were changed into runtime options instead in v5.4. No logic changes. Link: https://lore.kernel.org/r/20200121064747.138987-1-gaoxiang25@huawei.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2020-01-11erofs: fix out-of-bound read for shifted uncompressed blockGao Xiang
rq->out[1] should be valid before accessing. Otherwise, in very rare cases, out-of-bound dirty onstack rq->out[1] can equal to *in and lead to unintended memmove behavior. Link: https://lore.kernel.org/r/20200107022546.19432-1-gaoxiang25@huawei.com Fixes: 7fc45dbc938a ("staging: erofs: introduce generic decompression backend") Cc: <stable@vger.kernel.org> # 5.3+ Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2020-01-07erofs: remove void tagging/untagging of workgroup pointersVladimir Zapolskiy
Because workgroup pointers inserted to a radix tree are always tagged with a single value of 0, it is possible to remove tagging and untagging of the pointers completely. Signed-off-by: Vladimir Zapolskiy <vladimir@tuxera.com> Link: https://lore.kernel.org/r/20200102120118.14979-4-vladimir@tuxera.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2020-01-07erofs: remove unused tag argument while registering a workgroupVladimir Zapolskiy
All workgroups are registered with tag value set to 0, to simplify erofs_register_workgroup() interface the tag argument can be removed, if its only value is sent down to the function body. Signed-off-by: Vladimir Zapolskiy <vladimir@tuxera.com> Link: https://lore.kernel.org/r/20200102120118.14979-3-vladimir@tuxera.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2020-01-07erofs: remove unused tag argument while finding a workgroupVladimir Zapolskiy
It is feasible to simplify erofs_find_workgroup() interface by removing an unused function argument. While formally the argument is used in the function itself, its assigned value is ignored on the caller side. Signed-off-by: Vladimir Zapolskiy <vladimir@tuxera.com> Link: https://lore.kernel.org/r/20200102120118.14979-2-vladimir@tuxera.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2020-01-07erofs: correct indentation of an assigned structure inside a functionVladimir Zapolskiy
Trivial change, the expected indentation ruled by the coding style hasn't been met. Signed-off-by: Vladimir Zapolskiy <vladimir@tuxera.com> Link: https://lore.kernel.org/r/20200102120232.15074-1-vladimir@tuxera.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-12-11Merge tag 'erofs-for-5.5-rc2-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs Pull erofs fixes from Gao Xiang: "Mainly address a regression reported by David recently observed together with overlayfs due to the improper return value of listxattr() without xattr. Update outdated expressions in document as well. Summary: - Fix improper return value of listxattr() with no xattr - Keep up documentation with latest code" * tag 'erofs-for-5.5-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs: erofs: update documentation erofs: zero out when listxattr is called with no xattr
2019-12-04erofs: zero out when listxattr is called with no xattrGao Xiang
As David reported [1], ENODATA returns when attempting to modify files by using EROFS as an overlayfs lower layer. The root cause is that listxattr could return unexpected -ENODATA by mistake for inodes without xattr. That breaks listxattr return value convention and it can cause copy up failure when used with overlayfs. Resolve by zeroing out if no xattr is found for listxattr. [1] https://lore.kernel.org/r/CAEvUa7nxnby+rxK-KRMA46=exeOMApkDMAV08AjMkkPnTPV4CQ@mail.gmail.com Link: https://lore.kernel.org/r/20191201084040.29275-1-hsiangkao@aol.com Fixes: cadf1ccf1b00 ("staging: erofs: add error handling for xattr submodule") Cc: <stable@vger.kernel.org> # 4.19+ Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-11-24erofs: remove unnecessary output in erofs_show_options()Chengguang Xu
We have already handled cache_strategy option carefully, so incorrect setting could not pass option parsing. Meanwhile, print 'cache_strategy=(unknown)' can cause failure on remount. Link: https://lore.kernel.org/r/20191119115049.3401-1-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Reviewed-by: Gao Xiang <gaoxiang25@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-11-24erofs: drop all vle annotations for runtime namesGao Xiang
VLE was an old informal name of fixed-sized output compression which came from published ATC'19 paper [1]. Drop those old annotations since erofs can handle all encoded clusters in block-aligned basis, which is wider than fixed-sized output compression after larger clustersize feature is fully implemented. Unaligned encoding won't be considered in EROFS since it's not friendly to inplace I/O and perhaps decompression inplace. a) Fixed-sized output compression with 16KB pcluster: ___________________________________ |xxxxxxxx|xxxxxxxx|xxxxxxxx|xxxxxxxx| |___ 0___|___ 1___|___ 2___|___ 3___| physical blocks b) Block-aligned fixed-sized input compression with 16KB pcluster: ___________________________________ |xxxxxxxx|xxxxxxxx|xxxxxxxx|xxx00000| |___ 0___|___ 1___|___ 2___|___ 3___| physical blocks c) Block-unaligned fixed-sized input compression with 16KB compression unit: ____________________________________________ |..xxxxxx|xxxxxxxx|xxxxxxxx|xxxxxxxx|x.......| |___ 0___|___ 1___|___ 2___|___ 3___|___ 4___| physical blocks Refine better names for those as well. [1] https://www.usenix.org/conference/atc19/presentation/gao Link: https://lore.kernel.org/r/20191108033733.63919-1-gaoxiang25@huawei.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-11-24erofs: support superblock checksumPratik Shinde
Introduce superblock checksum feature in order to check at mounting time. Note that the first 1024 bytes are ignore for x86 boot sectors and other oddities. Link: https://lore.kernel.org/r/20191104024937.113939-1-gaoxiang25@huawei.com Signed-off-by: Pratik Shinde <pratikshinde320@gmail.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-11-24erofs: set iowait for sync decompressionGao Xiang
For those tasks waiting I/O for sync decompression, they should be better marked as IO wait state. Link: https://lore.kernel.org/r/20191008125616.183715-5-gaoxiang25@huawei.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-11-24erofs: clean up decompress queue stuffsGao Xiang
Previously, both z_erofs_unzip_io and z_erofs_unzip_io_sb record decompress queues for backend to use. The only difference is that z_erofs_unzip_io is used for on-stack sync decompression so that it doesn't have a super block field (since the caller can pass it in its context), but it increases complexity with only a pointer saving. Rename z_erofs_unzip_io to z_erofs_decompressqueue with a fixed super_block member and kill the other entirely, and it can fallback to sync decompression if memory allocation failure. Link: https://lore.kernel.org/r/20191008125616.183715-4-gaoxiang25@huawei.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-11-24erofs: get rid of __stagingpage_alloc helperGao Xiang
Now open code is much cleaner due to iterative development. Link: https://lore.kernel.org/r/20191124025217.12345-1-hsiangkao@aol.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-10-16erofs: remove dead code since managed cache is now built-inGao Xiang
After commit 4279f3f9889f ("staging: erofs: turn cache strategies into mount options"), cache strategies are changed into mount options rather than old build configs. Let's kill useless code for obsoleted build options. Link: https://lore.kernel.org/r/20191008125616.183715-2-gaoxiang25@huawei.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-10-16erofs: clean up collection handling routinesGao Xiang
- change return value to int since collection is already returned within the collector. - better function naming. Link: https://lore.kernel.org/r/20191008125616.183715-1-gaoxiang25@huawei.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-10-01erofs: fix mis-inplace determination related with noio chainGao Xiang
Fix a recent cleanup patch. noio (bypass) chain is handled asynchronously against submit chain, therefore inplace I/O or pagevec cannot be applied to such pages. Add detailed comment for this as well. Fixes: 97e86a858bc3 ("staging: erofs: tidy up decompression frontend") Reviewed-by: Chao Yu <yuchao0@huawei.com> Link: https://lore.kernel.org/r/20190922100434.229340-1-gaoxiang25@huawei.com Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-10-01erofs: fix erofs_get_meta_page locking due to a cleanupGao Xiang
After doing more drop_caches stress test on our products, I found the mistake introduced by a very recent cleanup [1]. The current rule is that "erofs_get_meta_page" should be returned with page locked (although it's mostly unnecessary for read-only fs after pages are PG_uptodate), but a fix should be done for this. [1] https://lore.kernel.org/r/20190904020912.63925-26-gaoxiang25@huawei.com Fixes: 618f40ea026b ("erofs: use read_cache_page_gfp for erofs_get_meta_page") Reviewed-by: Chao Yu <yuchao0@huawei.com> Link: https://lore.kernel.org/r/20190921184355.149928-1-gaoxiang25@huawei.com Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-10-01erofs: fix return value check in erofs_read_superblock()Wei Yongjun
In case of error, the function read_mapping_page() returns ERR_PTR() not NULL. The NULL test in the return value check should be replaced with IS_ERR(). Fixes: fe7c2423570d ("erofs: use read_mapping_page instead of sb_bread") Reviewed-by: Gao Xiang <gaoxiang25@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Link: https://lore.kernel.org/r/20190918083033.47780-1-weiyongjun1@huawei.com Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
2019-09-05erofs: use read_cache_page_gfp for erofs_get_meta_pageGao Xiang
As Christoph said [1], "I'd much prefer to just use read_cache_page_gfp, and live with the fact that this allocates bufferheads behind you for now. I'll try to speed up my attempts to get rid of the buffer heads on the block device mapping instead. " This simplifies the code a lot and a minor thing is "no REQ_META (e.g. for blktrace) on metadata at all..." [1] https://lore.kernel.org/r/20190903153704.GA2201@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-26-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: always use iget5_lockedGao Xiang
As Christoph said [1] [2], "Just use the slightly more complicated 32-bit version everywhere so that you have a single actually tested code path. And then remove this helper. " [1] https://lore.kernel.org/r/20190829102426.GE20598@infradead.org/ [2] https://lore.kernel.org/r/20190902125320.GA16726@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-25-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: use read_mapping_page instead of sb_breadGao Xiang
As Christoph said [1], "This seems to be your only direct use of buffer heads, which while not deprecated are a bit of an ugly step child. So if you can easily avoid creating a buffer_head dependency in a new filesystem I think you should avoid it. " [1] https://lore.kernel.org/r/20190902125109.GA9826@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-24-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: rename errln/infoln/debugln to erofs_{err, info, dbg}Gao Xiang
Add prefix "erofs_" to these functions and print sb->s_id as a prefix to erofs_{err, info} so that the user knows which file system is affected. Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-23-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: save one level of indentationGao Xiang
As Christoph said [1], ".. and save one level of indentation." [1] https://lore.kernel.org/r/20190829102426.GE20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-22-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: kill use_vmap module parameterGao Xiang
As Christoph said [1], "vm_map_ram is supposed to generally behave better. So if it doesn't please report that that to the arch maintainer and linux-mm so that they can look into the issue. Having user make choices of deep down kernel internals is just a horrible interface. Please talk to maintainers of other bits of the kernel if you see issues and / or need enhancements. " Let's redo the previous conclusion and kill the vmap approach. [1] https://lore.kernel.org/r/20190830165533.GA10909@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-21-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: kill all erofs specific fault injectionGao Xiang
As Christoph suggested [1], "Please just use plain kmalloc everywhere and let the normal kernel error injection code take care of injeting any errors." [1] https://lore.kernel.org/r/20190829102426.GE20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-20-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: add "erofs_" prefix for common and short functionsGao Xiang
Add erofs_ prefix to free_inode, alloc_inode, ... Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-19-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: kill __submit_bio()Gao Xiang
As Christoph pointed out [1], " Why is there __submit_bio which really just obsfucates what is going on? Also why is __submit_bio using bio_set_op_attrs instead of opencode it as the comment right next to it asks you to? " Let's use submit_bio directly instead. [1] https://lore.kernel.org/r/20190830162812.GA10694@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-18-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: kill prio and nofail of erofs_get_meta_page()Gao Xiang
As Christoph pointed out [1], "Why is there __erofs_get_meta_page with the two weird booleans instead of a single erofs_get_meta_page that gets and gfp_t for additional flags and an unsigned int for additional bio op flags." And since all callers can handle errors, let's kill prio and nofail and erofs_get_inline_page() now. [1] https://lore.kernel.org/r/20190830162812.GA10694@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-17-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: localize erofs_grab_bio()Gao Xiang
As Christoph pointed out [1], "erofs_grab_bio tries to handle a bio_alloc failure, except that the function will not actually fail due the mempool backing it." Sorry about useless code, fix it now and localize erofs_grab_bio [2]. [1] https://lore.kernel.org/r/20190830162812.GA10694@infradead.org/ [2] https://lore.kernel.org/r/20190902122016.GL15931@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-16-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: kill verbose debug info in erofs_fill_superGao Xiang
As Christoph said [1], "That is some very verbose debug info. We usually don't add that and let people trace the function instead. " [1] https://lore.kernel.org/r/20190829101545.GC20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-15-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: use dsb instead of layout for ondisk super_blockGao Xiang
As Christoph pointed out [1], "Why is the variable name for the on-disk subperblock layout? We usually still calls this something with sb in the name, e.g. dsb. for disksuper block. " Let's fix it. [1] https://lore.kernel.org/r/20190829101545.GC20598@infradead.org/ Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-14-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: better erofs symlink stuffsGao Xiang
Fix as Christoph suggested [1] [2], "remove is_inode_fast_symlink and just opencode it in the few places using it" and "Please just set the ops directly instead of obsfucating that in a single caller, single line inline function. And please set it instead of the normal symlink iops in the same place where you also set those." [1] https://lore.kernel.org/r/20190830163910.GB29603@infradead.org/ [2] https://lore.kernel.org/r/20190829102426.GE20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-13-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: update comments in inode.cGao Xiang
As Christoph suggested [1], update them all. [1] https://lore.kernel.org/r/20190829102426.GE20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-12-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: update erofs_fs.h commentsGao Xiang
As Christoph said [1] [2], update it now. [1] https://lore.kernel.org/r/20190902124521.GA22153@infradead.org/ [2] https://lore.kernel.org/r/20190902120548.GB15931@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-11-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: use erofs_inode namingGao Xiang
As Christoph suggested [1], "Why is this called vnode instead of inode? That seems like a rather odd naming for a Linux file system." [1] https://lore.kernel.org/r/20190829101545.GC20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-10-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: kill erofs_{init,exit}_inode_cacheGao Xiang
As Christoph said [1] "having this function seems entirely pointless", let's kill those. filesystem function name ext2,f2fs,ext4,isofs,squashfs,cifs,... init_inodecache In addition, add a necessary "rcu_barrier()" on exit_fs(); [1] https://lore.kernel.org/r/20190829101545.GC20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-9-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: better naming for erofs inode related stuffsGao Xiang
updates inode naming - kill is_inode_layout_compression [1] - kill magic underscores [2] [3] - better naming for datamode & data_mapping_mode [3] - better naming erofs_inode_{compact, extended} [4] [1] https://lore.kernel.org/r/20190829102426.GE20598@infradead.org/ [2] https://lore.kernel.org/r/20190829102426.GE20598@infradead.org/ [3] https://lore.kernel.org/r/20190902122627.GN15931@infradead.org/ [4] https://lore.kernel.org/r/20190902125438.GA17750@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-8-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: use feature_incompat rather than requirementsGao Xiang
As Christoph said [1], "This is only cosmetic, why not stick to feature_compat and feature_incompat?" In my thought, requirements means "incompatible" instead of "feature" though. [1] https://lore.kernel.org/r/20190902125109.GA9826@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-7-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: update erofs_inode_is_data_compressed helperGao Xiang
As Christoph said, "This looks like a really obsfucated way to write: return datamode == EROFS_INODE_FLAT_COMPRESSION || datamode == EROFS_INODE_FLAT_COMPRESSION_LEGACY; " Although I had my own consideration, it's the right way for now. [1] https://lore.kernel.org/r/20190829095954.GB20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-6-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: kill __packed for on-disk structuresGao Xiang
As Christoph suggested "Please don't add __packed" [1], remove all __packed except struct erofs_dirent here. Note that all on-disk fields except struct erofs_dirent (12 bytes with a 8-byte nid) in EROFS are naturally aligned. [1] https://lore.kernel.org/r/20190829095954.GB20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-5-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: some macros are much more readable as a functionGao Xiang
As Christoph suggested [1], these macros are much more readable as a function. [1] https://lore.kernel.org/r/20190829095954.GB20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-4-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: on-disk format should have explicitly assigned numbersGao Xiang
As Christoph suggested [1], on-disk format should have explicitly assigned numbers. [1] https://lore.kernel.org/r/20190829095954.GB20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-3-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-05erofs: remove all the byte offset commentsGao Xiang
As Christoph suggested [1], "Please remove all the byte offset comments. that is something that can easily be checked with gdb or pahole." [1] https://lore.kernel.org/r/20190829095954.GB20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-2-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-04erofs: using switch-case while checking the inode type.Pratik Shinde
while filling the linux inode, using switch-case statement to check the type of inode. switch-case statement looks more clean here. Signed-off-by: Pratik Shinde <pratikshinde320@gmail.com> Reviewed-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190830095615.10995-1-pratikshinde320@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-30erofs: reduntant assignment in __erofs_get_meta_page()Gao Xiang
As Joe Perches suggested [1], err = bio_add_page(bio, page, PAGE_SIZE, 0); - if (unlikely(err != PAGE_SIZE)) { + if (err != PAGE_SIZE) { err = -EFAULT; goto err_out; } The initial assignment to err is odd as it's not actually an error value -E<FOO> but a int size from a unsigned int len. Here the return is either 0 or PAGE_SIZE. This would be more legible to me as: if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE) { err = -EFAULT; goto err_out; } [1] https://lore.kernel.org/r/74c4784319b40deabfbaea92468f7e3ef44f1c96.camel@perches.com/ Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190829171741.225219-1-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-30erofs: remove all likely/unlikely annotationsGao Xiang
As Dan Carpenter suggested [1], I have to remove all erofs likely/unlikely annotations. [1] https://lore.kernel.org/linux-fsdevel/20190829154346.GK23584@kadam/ Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190829163827.203274-1-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-24erofs: move erofs out of stagingGao Xiang
EROFS filesystem has been merged into linux-staging for a year. EROFS is designed to be a better solution of saving extra storage space with guaranteed end-to-end performance for read-only files with the help of reduced metadata, fixed-sized output compression and decompression inplace technologies. In the past year, EROFS was greatly improved by many people as a staging driver, self-tested, betaed by a large number of our internal users, successfully applied to almost all in-service HUAWEI smartphones as the part of EMUI 9.1 and proven to be stable enough to be moved out of staging. EROFS is a self-contained filesystem driver. Although there are still some TODOs to be more generic, we have a dedicated team actively keeping on working on EROFS in order to make it better with the evolution of Linux kernel as the other in-kernel filesystems. As Pavel suggested, it's better to do as one commit since git can do moves and all histories will be saved in this way. Let's promote it from staging and enhance it more actively as a "real" part of kernel for more wider scenarios! Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Pavel Machek <pavel@denx.de> Cc: David Sterba <dsterba@suse.cz> Cc: Amir Goldstein <amir73il@gmail.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Darrick J . Wong <darrick.wong@oracle.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: Jan Kara <jack@suse.cz> Cc: Richard Weinberger <richard@nod.at> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Chao Yu <yuchao0@huawei.com> Cc: Miao Xie <miaoxie@huawei.com> Cc: Li Guifu <bluce.liguifu@huawei.com> Cc: Fang Wei <fangwei1@huawei.com> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190822213659.5501-1-hsiangkao@aol.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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