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Wed, 7 Oct 2020 01:07:52 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,jglisse@redhat.com,,RULES_HIT:30029:30045:30054:30064:30070:30075:30090,0,RBL:216.205.24.124:@redhat.com:.lbl8.mailshell.net-64.10.201.10 62.18.0.100;04y8ndc74ereioi8s39a1gmwece3tycefapjwhw4fx3yfq5f16761hf4sq5u8k5.kdayx4sepxd9be34i6uewizgjd7s1wsr591ix3oosr9dbqdj3bme3n11q9fs4qp.r-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:ft,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: tin12_3009b01271cb X-Filterd-Recvd-Size: 10339 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by imf04.hostedemail.com (Postfix) with ESMTP for ; Wed, 7 Oct 2020 01:07:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602032871; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Al92MyeBChT8tzOQ+O0pHpVNfPLYQ6PQt7R8QJetTew=; b=PeRvPNkgoR+wDWXguX4eL/nPg98XY6ncU2mCOdTWJnwbFU0LlkSJp6+ixRWxooQvwFYSVY 4dXRUdtrDTgqVJWTE/L3znRQePkwBSWnurmiCxtzEF0CPd95N27qfN1g13A61tImF8p9qY RIaZeDz0pXxgwo78/5zQURo/blmSGPw= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-443-1erG1MQUPYSzK0pI4Ow4ow-1; Tue, 06 Oct 2020 21:07:47 -0400 X-MC-Unique: 1erG1MQUPYSzK0pI4Ow4ow-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D89CD803F5B; Wed, 7 Oct 2020 01:07:45 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-119-161.rdu2.redhat.com [10.10.119.161]) by smtp.corp.redhat.com (Postfix) with ESMTP id D03E95D9D2; Wed, 7 Oct 2020 01:07:44 +0000 (UTC) From: jglisse@redhat.com To: linux-kernel@vger.kernel.org Cc: =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Andrew Morton , Alexander Viro , Tejun Heo , Jan Kara , Josef Bacik Subject: [PATCH 14/14] mm: add struct address_space to is_dirty_writeback() callback Date: Tue, 6 Oct 2020 21:06:03 -0400 Message-Id: <20201007010603.3452458-15-jglisse@redhat.com> In-Reply-To: <20201007010603.3452458-1-jglisse@redhat.com> References: <20201007010603.3452458-1-jglisse@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Jérôme Glisse This is part of patchset to remove dependency on struct page.mapping field so that we can temporarily update it to point to a special structure tracking temporary page state (note that original mapping pointer is preserved and can still be accessed but at a cost). Add struct address_space to is_dirty_writeback() callback arguments. Note that this patch does not make use of the new argument, nor does it use a valid one at call site (by default this patch just use NULL for new argument value). Use following script (from root of linux kernel tree): ./that-script.sh that-semantic-patch.spatch %<-------------------------------------------------------------------- #!/bin/sh spatch_file=$1 echo PART1 =========================================================== # P1 find callback functions name spatch --dir . --no-includes -D part1 --sp-file $spatch_file echo PART2 =========================================================== # P2 change callback function prototype cat /tmp/unicorn-functions | sort | uniq | while read func ; do for file in $( git grep -l $func -- '*.[ch]' ) ; do echo $file spatch --no-includes --in-place -D part2 \ -D fn=$func --sp-file $spatch_file $file done done echo PART 3 ========================================================== # P3 find all function which call the callback spatch --dir . --include-headers -D part3 --sp-file $spatch_file echo PART 4=========================================================== # P4 change all funcitons which call the callback cat /tmp/unicorn-files | sort | uniq | while read file ; do echo $file spatch --no-includes --in-place -D part4 \ --sp-file $spatch_file $file done -------------------------------------------------------------------->% With the following semantic patch: %<-------------------------------------------------------------------- virtual part1, part2, part3, part4 // ---------------------------------------------------------------------------- // Part 1 is grepping all function that are use as callback for is_dirty_writeback. // initialize file where we collect all function name (erase it) @initialize:python depends on part1@ @@ file=open('/tmp/unicorn-functions', 'w') file.close() // match function name use as a callback @p1r2 depends on part1@ identifier I1, FN; @@ struct address_space_operations I1 = {..., .is_dirty_writeback = FN, ...}; @script:python p1r3 depends on p1r2@ funcname << p1r2.FN; @@ if funcname != "NULL": file=open('/tmp/unicorn-functions', 'a') file.write(funcname + '\n') file.close() // ------------------------------------------------------------------- // Part 2 modify callback @p2r1 depends on part2@ identifier virtual.fn; identifier I1, I2, I3; type T1, T2, T3; @@ void fn( +struct address_space *__mapping, T1 I1, T2 I2, T3 I3) { ... } @p2r2 depends on part2@ identifier virtual.fn; identifier I1, I2, I3; type T1, T2, T3; @@ void fn( +struct address_space *__mapping, T1 I1, T2 I2, T3 I3); @p2r3 depends on part2@ identifier virtual.fn; expression E1, E2, E3; @@ fn( +MAPPING_NULL, E1, E2, E3) // ---------------------------------------------------------------------------- // Part 3 is grepping all function that are use the callback for is_dirty_writeback. // initialize file where we collect all function name (erase it) @initialize:python depends on part3@ @@ file=open('/tmp/unicorn-files', 'w') file.write("./include/linux/pagemap.h\n") file.write("./include/linux/mm.h\n") file.write("./include/linux/fs.h\n") file.write("./mm/readahead.c\n") file.write("./mm/filemap.c\n") file.close() @p3r1 depends on part3 exists@ expression E1, E2, E3, E4; identifier FN; position P; @@ FN@P(...) {... ( E1.a_ops->is_dirty_writeback(E2, E3, E4) | E1->a_ops->is_dirty_writeback(E2, E3, E4) ) ...} @script:python p3r2 depends on p3r1@ P << p3r1.P; @@ file=open('/tmp/unicorn-files', 'a') file.write(P[0].file + '\n') file.close() // ------------------------------------------------------------------- // Part 4 generic modification @p4r1 depends on part4@ @@ struct address_space_operations { ... void (*is_dirty_writeback)( +struct address_space *, struct page *, ...); ... }; @p4r2 depends on part4@ expression E1, E2, E3, E4; @@ E1.a_ops->is_dirty_writeback( +MAPPING_NULL, E2, E3, E4) @p4r3 depends on part4@ expression E1, E2, E3, E4; @@ E1->a_ops->is_dirty_writeback( +MAPPING_NULL, E2, E3, E4) -------------------------------------------------------------------->% Signed-off-by: Jérôme Glisse Cc: linux-mm@kvack.org Cc: linux-fsdevel@vger.kernel.org Cc: Andrew Morton Cc: Alexander Viro Cc: linux-fsdevel@vger.kernel.org Cc: Tejun Heo Cc: Jan Kara Cc: Josef Bacik --- fs/buffer.c | 3 ++- fs/nfs/file.c | 5 +++-- include/linux/buffer_head.h | 3 ++- include/linux/fs.h | 3 ++- mm/vmscan.c | 3 ++- 5 files changed, 11 insertions(+), 6 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index 7adf0af7530ba..d050ef5bf9d7b 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -83,7 +83,8 @@ EXPORT_SYMBOL(unlock_buffer); * are unlocked and clean then the PageDirty information is stale. If * any of the pages are locked, it is assumed they are locked for IO. */ -void buffer_check_dirty_writeback(struct page *page, +void buffer_check_dirty_writeback(struct address_space *__mapping, + struct page *page, bool *dirty, bool *writeback) { struct buffer_head *head, *bh; diff --git a/fs/nfs/file.c b/fs/nfs/file.c index b1ba143de48d9..d99b2db7ba3a3 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -437,8 +437,9 @@ static int nfs_release_page(struct address_space *__mapping, return nfs_fscache_release_page(page, gfp); } -static void nfs_check_dirty_writeback(struct page *page, - bool *dirty, bool *writeback) +static void nfs_check_dirty_writeback(struct address_space *__mapping, + struct page *page, + bool *dirty, bool *writeback) { struct nfs_inode *nfsi; struct address_space *mapping = page_file_mapping(page); diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 89a3758531889..b19998fa8e4d4 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -145,7 +145,8 @@ BUFFER_FNS(Defer_Completion, defer_completion) }) #define page_has_buffers(page) PagePrivate(page) -void buffer_check_dirty_writeback(struct page *page, +void buffer_check_dirty_writeback(struct address_space *__mapping, + struct page *page, bool *dirty, bool *writeback); /* diff --git a/include/linux/fs.h b/include/linux/fs.h index 6798a13e3c980..ebdb961016925 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -415,7 +415,8 @@ struct address_space_operations { int (*is_partially_uptodate) (struct address_space *, struct page *, unsigned long, unsigned long); - void (*is_dirty_writeback) (struct page *, bool *, bool *); + void (*is_dirty_writeback) (struct address_space *, struct page *, + bool *, bool *); int (*error_remove_page)(struct address_space *, struct page *); /* swapfile support */ diff --git a/mm/vmscan.c b/mm/vmscan.c index bae7fb9c3512a..d402f94e14f2f 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1058,7 +1058,8 @@ static void page_check_dirty_writeback(struct page *page, mapping = page_mapping(page); if (mapping && mapping->a_ops->is_dirty_writeback) - mapping->a_ops->is_dirty_writeback(page, dirty, writeback); + mapping->a_ops->is_dirty_writeback(MAPPING_NULL, page, dirty, + writeback); } /*