From: Jan Kara <jack@suse.cz> To: Eric Biggers <ebiggers@kernel.org> Cc: linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, Theodore Ts'o <tytso@mit.edu>, Christoph Hellwig <hch@lst.de> Subject: Re: [PATCH v2 06/12] fs: pass only I_DIRTY_INODE flags to ->dirty_inode Date: Mon, 11 Jan 2021 15:56:33 +0100 [thread overview] Message-ID: <20210111145633.GE18475@quack2.suse.cz> (raw) In-Reply-To: <20210109075903.208222-7-ebiggers@kernel.org> On Fri 08-01-21 23:58:57, Eric Biggers wrote: > From: Eric Biggers <ebiggers@google.com> > > ->dirty_inode is now only called when I_DIRTY_INODE (I_DIRTY_SYNC and/or > I_DIRTY_DATASYNC) is set. However it may still be passed other dirty > flags at the same time, provided that these other flags happened to be > passed to __mark_inode_dirty() at the same time as I_DIRTY_INODE. > > This doesn't make sense because there is no reason for filesystems to > care about these extra flags. Nor are filesystems notified about all > updates to these other flags. > > Therefore, mask the flags before passing them to ->dirty_inode. > > Also properly document ->dirty_inode in vfs.rst. > > Reviewed-by: Christoph Hellwig <hch@lst.de> > Signed-off-by: Eric Biggers <ebiggers@google.com> Looks good to me. Feel free to add: Reviewed-by: Jan Kara <jack@suse.cz> Honza > --- > Documentation/filesystems/vfs.rst | 5 ++++- > fs/fs-writeback.c | 2 +- > 2 files changed, 5 insertions(+), 2 deletions(-) > > diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst > index ca52c82e5bb54..287b80948a40b 100644 > --- a/Documentation/filesystems/vfs.rst > +++ b/Documentation/filesystems/vfs.rst > @@ -270,7 +270,10 @@ or bottom half). > ->alloc_inode. > > ``dirty_inode`` > - this method is called by the VFS to mark an inode dirty. > + this method is called by the VFS when an inode is marked dirty. > + This is specifically for the inode itself being marked dirty, > + not its data. If the update needs to be persisted by fdatasync(), > + then I_DIRTY_DATASYNC will be set in the flags argument. > > ``write_inode`` > this method is called when the VFS needs to write an inode to > diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c > index b7616bbd55336..2e6064012f7d3 100644 > --- a/fs/fs-writeback.c > +++ b/fs/fs-writeback.c > @@ -2259,7 +2259,7 @@ void __mark_inode_dirty(struct inode *inode, int flags) > trace_writeback_dirty_inode_start(inode, flags); > > if (sb->s_op->dirty_inode) > - sb->s_op->dirty_inode(inode, flags); > + sb->s_op->dirty_inode(inode, flags & I_DIRTY_INODE); > > trace_writeback_dirty_inode(inode, flags); > > -- > 2.30.0 > -- Jan Kara <jack@suse.com> SUSE Labs, CR
WARNING: multiple messages have this Message-ID (diff)
From: Jan Kara <jack@suse.cz> To: Eric Biggers <ebiggers@kernel.org> Cc: Theodore Ts'o <tytso@mit.edu>, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, Christoph Hellwig <hch@lst.de> Subject: Re: [f2fs-dev] [PATCH v2 06/12] fs: pass only I_DIRTY_INODE flags to ->dirty_inode Date: Mon, 11 Jan 2021 15:56:33 +0100 [thread overview] Message-ID: <20210111145633.GE18475@quack2.suse.cz> (raw) In-Reply-To: <20210109075903.208222-7-ebiggers@kernel.org> On Fri 08-01-21 23:58:57, Eric Biggers wrote: > From: Eric Biggers <ebiggers@google.com> > > ->dirty_inode is now only called when I_DIRTY_INODE (I_DIRTY_SYNC and/or > I_DIRTY_DATASYNC) is set. However it may still be passed other dirty > flags at the same time, provided that these other flags happened to be > passed to __mark_inode_dirty() at the same time as I_DIRTY_INODE. > > This doesn't make sense because there is no reason for filesystems to > care about these extra flags. Nor are filesystems notified about all > updates to these other flags. > > Therefore, mask the flags before passing them to ->dirty_inode. > > Also properly document ->dirty_inode in vfs.rst. > > Reviewed-by: Christoph Hellwig <hch@lst.de> > Signed-off-by: Eric Biggers <ebiggers@google.com> Looks good to me. Feel free to add: Reviewed-by: Jan Kara <jack@suse.cz> Honza > --- > Documentation/filesystems/vfs.rst | 5 ++++- > fs/fs-writeback.c | 2 +- > 2 files changed, 5 insertions(+), 2 deletions(-) > > diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst > index ca52c82e5bb54..287b80948a40b 100644 > --- a/Documentation/filesystems/vfs.rst > +++ b/Documentation/filesystems/vfs.rst > @@ -270,7 +270,10 @@ or bottom half). > ->alloc_inode. > > ``dirty_inode`` > - this method is called by the VFS to mark an inode dirty. > + this method is called by the VFS when an inode is marked dirty. > + This is specifically for the inode itself being marked dirty, > + not its data. If the update needs to be persisted by fdatasync(), > + then I_DIRTY_DATASYNC will be set in the flags argument. > > ``write_inode`` > this method is called when the VFS needs to write an inode to > diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c > index b7616bbd55336..2e6064012f7d3 100644 > --- a/fs/fs-writeback.c > +++ b/fs/fs-writeback.c > @@ -2259,7 +2259,7 @@ void __mark_inode_dirty(struct inode *inode, int flags) > trace_writeback_dirty_inode_start(inode, flags); > > if (sb->s_op->dirty_inode) > - sb->s_op->dirty_inode(inode, flags); > + sb->s_op->dirty_inode(inode, flags & I_DIRTY_INODE); > > trace_writeback_dirty_inode(inode, flags); > > -- > 2.30.0 > -- Jan Kara <jack@suse.com> SUSE Labs, CR _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
next prev parent reply other threads:[~2021-01-11 14:57 UTC|newest] Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-09 7:58 [PATCH v2 00/12] lazytime fix and cleanups Eric Biggers 2021-01-09 7:58 ` [f2fs-dev] " Eric Biggers 2021-01-09 7:58 ` [PATCH v2 01/12] fs: fix lazytime expiration handling in __writeback_single_inode() Eric Biggers 2021-01-09 7:58 ` [f2fs-dev] " Eric Biggers 2021-01-11 10:48 ` Christoph Hellwig 2021-01-11 10:48 ` [f2fs-dev] " Christoph Hellwig 2021-01-11 14:46 ` Jan Kara 2021-01-11 14:46 ` [f2fs-dev] " Jan Kara 2021-01-09 7:58 ` [PATCH v2 02/12] fs: correctly document the inode dirty flags Eric Biggers 2021-01-09 7:58 ` [f2fs-dev] " Eric Biggers 2021-01-11 14:48 ` Jan Kara 2021-01-11 14:48 ` [f2fs-dev] " Jan Kara 2021-01-09 7:58 ` [PATCH v2 03/12] fs: only specify I_DIRTY_TIME when needed in generic_update_time() Eric Biggers 2021-01-09 7:58 ` [f2fs-dev] " Eric Biggers 2021-01-11 14:50 ` Jan Kara 2021-01-11 14:50 ` [f2fs-dev] " Jan Kara 2021-01-09 7:58 ` [PATCH v2 04/12] fat: only specify I_DIRTY_TIME when needed in fat_update_time() Eric Biggers 2021-01-09 7:58 ` [f2fs-dev] " Eric Biggers 2021-01-11 10:52 ` Christoph Hellwig 2021-01-11 10:52 ` [f2fs-dev] " Christoph Hellwig 2021-01-11 19:50 ` Eric Biggers 2021-01-11 19:50 ` [f2fs-dev] " Eric Biggers 2021-01-12 5:21 ` Dave Chinner 2021-01-12 5:21 ` [f2fs-dev] " Dave Chinner 2021-01-12 13:23 ` Christoph Hellwig 2021-01-12 13:23 ` [f2fs-dev] " Christoph Hellwig 2021-01-11 14:52 ` Jan Kara 2021-01-11 14:52 ` [f2fs-dev] " Jan Kara 2021-01-09 7:58 ` [PATCH v2 05/12] fs: don't call ->dirty_inode for lazytime timestamp updates Eric Biggers 2021-01-09 7:58 ` [f2fs-dev] " Eric Biggers 2021-01-11 14:54 ` Jan Kara 2021-01-11 14:54 ` [f2fs-dev] " Jan Kara 2021-01-09 7:58 ` [PATCH v2 06/12] fs: pass only I_DIRTY_INODE flags to ->dirty_inode Eric Biggers 2021-01-09 7:58 ` [f2fs-dev] " Eric Biggers 2021-01-11 14:56 ` Jan Kara [this message] 2021-01-11 14:56 ` Jan Kara 2021-01-09 7:58 ` [PATCH v2 07/12] fs: clean up __mark_inode_dirty() a bit Eric Biggers 2021-01-09 7:58 ` [f2fs-dev] " Eric Biggers 2021-01-11 14:59 ` Jan Kara 2021-01-11 14:59 ` [f2fs-dev] " Jan Kara 2021-01-09 7:58 ` [PATCH v2 08/12] fs: drop redundant check from __writeback_single_inode() Eric Biggers 2021-01-09 7:58 ` [f2fs-dev] " Eric Biggers 2021-01-11 10:52 ` Christoph Hellwig 2021-01-11 10:52 ` [f2fs-dev] " Christoph Hellwig 2021-01-11 15:00 ` Jan Kara 2021-01-11 15:00 ` [f2fs-dev] " Jan Kara 2021-01-09 7:59 ` [PATCH v2 09/12] fs: improve comments for writeback_single_inode() Eric Biggers 2021-01-09 7:59 ` [f2fs-dev] " Eric Biggers 2021-01-11 10:53 ` Christoph Hellwig 2021-01-11 10:53 ` [f2fs-dev] " Christoph Hellwig 2021-01-11 15:05 ` Jan Kara 2021-01-11 15:05 ` [f2fs-dev] " Jan Kara 2021-01-09 7:59 ` [PATCH v2 10/12] gfs2: don't worry about I_DIRTY_TIME in gfs2_fsync() Eric Biggers 2021-01-09 7:59 ` [f2fs-dev] " Eric Biggers 2021-01-11 15:06 ` Jan Kara 2021-01-11 15:06 ` [f2fs-dev] " Jan Kara 2021-01-09 7:59 ` [PATCH v2 11/12] ext4: simplify i_state checks in __ext4_update_other_inode_time() Eric Biggers 2021-01-09 7:59 ` [f2fs-dev] " Eric Biggers 2021-01-11 10:53 ` Christoph Hellwig 2021-01-11 10:53 ` [f2fs-dev] " Christoph Hellwig 2021-01-11 20:23 ` Eric Biggers 2021-01-11 20:23 ` [f2fs-dev] " Eric Biggers 2021-01-12 13:25 ` Christoph Hellwig 2021-01-12 13:25 ` [f2fs-dev] " Christoph Hellwig 2021-02-03 5:16 ` Theodore Ts'o 2021-02-03 5:16 ` [f2fs-dev] " Theodore Ts'o 2021-01-11 15:11 ` Jan Kara 2021-01-11 15:11 ` [f2fs-dev] " Jan Kara 2021-01-09 7:59 ` [PATCH v2 12/12] xfs: remove a stale comment from xfs_file_aio_write_checks() Eric Biggers 2021-01-09 7:59 ` [f2fs-dev] " Eric Biggers 2021-01-12 17:31 ` Darrick J. Wong 2021-01-12 17:31 ` [f2fs-dev] " Darrick J. Wong 2021-01-11 15:15 ` [PATCH v2 00/12] lazytime fix and cleanups Jan Kara 2021-01-11 15:15 ` [f2fs-dev] " Jan Kara 2021-01-11 20:44 ` Eric Biggers 2021-01-11 20:44 ` [f2fs-dev] " Eric Biggers 2021-02-03 5:11 ` Theodore Ts'o 2021-02-03 5:11 ` [f2fs-dev] " Theodore Ts'o 2021-02-03 5:22 ` Eric Biggers 2021-02-03 5:22 ` [f2fs-dev] " Eric Biggers 2021-02-03 15:49 ` Theodore Ts'o 2021-02-03 15:49 ` [f2fs-dev] " Theodore Ts'o
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