From: Christoph Hellwig <hch@infradead.org>
To: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Cc: viro@ZenIV.linux.org.uk, jack@suse.cz, dedekind1@gmail.com,
richard.weinberger@gmail.com, linux-mtd@lists.infradead.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v3 01/39] fs: introduce a ->s_cdev field into struct super_block
Date: Sat, 3 Oct 2015 23:31:19 -0700 [thread overview]
Message-ID: <20151004063119.GF28519@infradead.org> (raw)
In-Reply-To: <1442307754-13233-2-git-send-email-yangds.fnst@cn.fujitsu.com>
On Tue, Sep 15, 2015 at 05:01:56PM +0800, Dongsheng Yang wrote:
> There are some filesystems are running on char devs, such
> as ubifs. So we need a field in super_block to hold a
> reference to the char device.
We only care about the block device to get a device number to return
in st.st_dev. And while filesystem literally run on top of a block
device that is not the case of a character device - you might use a
chardev to identify a device to mount but it'll never use the actual
char device.
So please don't bloat the superblock with this.
next prev parent reply other threads:[~2015-10-04 6:31 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-15 9:01 [PATCH v3 00/39] Add quota supporting in ubifs Dongsheng Yang
2015-09-15 9:01 ` [PATCH v3 01/39] fs: introduce a ->s_cdev field into struct super_block Dongsheng Yang
2015-10-04 6:31 ` Christoph Hellwig [this message]
2015-10-05 8:36 ` Jan Kara
2015-09-15 9:01 ` [PATCH v3 02/39] fs: cleanup: remove the blank line before EXPORT_SYMBOL Dongsheng Yang
2015-09-15 9:01 ` [PATCH v3 03/39] fs: super: cleanup: make the comment of each function aligned Dongsheng Yang
2015-09-15 9:01 ` [PATCH v3 04/39] fs: super: consolidate the get_super class functions Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 05/39] fs: super: introduce a get_super_cdev to get super by a cdev reference Dongsheng Yang
2015-10-04 6:32 ` Christoph Hellwig
2015-09-15 9:02 ` [PATCH v3 06/39] fs: super: introduce a get_super_cdev_thawed to get sb by " Dongsheng Yang
2015-09-15 21:24 ` Jan Kara
2015-09-15 9:02 ` [PATCH v3 07/39] fs: char_dev: introduce cd_acquire function to acquire cdev Dongsheng Yang
2015-09-16 8:16 ` Jan Kara
2015-09-17 3:30 ` Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 08/39] fs: introduce a __lookup_dev for internal using Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 09/39] fs: char_dev: introduce lookup_cdev to get cdev by pathname Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 10/39] fs: dquot: skip invalidate_bdev if bdev is NULL Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 11/39] fs: quota: replace opened calling of ->sync_fs with sync_filesystem Dongsheng Yang
2015-09-16 10:14 ` Jan Kara
2015-09-17 6:28 ` Dongsheng Yang
2015-09-17 11:05 ` Jan Kara
2015-09-18 5:49 ` Dongsheng Yang
2015-09-18 9:00 ` Jan Kara
2015-09-21 4:31 ` Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 12/39] fs: quota: make quota support fs which is running on char dev Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 13/39] fs: introduce a get_qsize() to inode_operations Dongsheng Yang
2015-10-04 6:33 ` Christoph Hellwig
2015-10-05 8:01 ` Jan Kara
2015-09-15 9:02 ` [PATCH v3 14/39] fs: quota: restore i_flags of quota files in dquot_disable Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 15/39] fs: quota: introduce a callback of restore_iflags to quotactl_ops Dongsheng Yang
2015-09-16 9:47 ` Jan Kara
2015-09-15 9:02 ` [PATCH v3 16/39] ubi: introduce a interface to get cdev in ubi_volume Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 17/39] ubifs: extend budget for blocks Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 18/39] ubifs: fill sb->s_cdev in ubifs_fill_super() Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 19/39] ubifs: fill ->s_dev in ubifs_fill_super Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 20/39] ubifs: export read_block() from file.c Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 21/39] ubifs: introduce i_dquot to ubifs_inode Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 22/39] ubifs: implement IO functions for quota files Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 23/39] ubifs: disable quota in ubifs_put_super Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 24/39] ubifs: write quota back in ubifs_sync Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 25/39] ubifs: set/clear MS_RDONLY properly in ubifs_remount Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 26/39] ubifs: suspend & resume quota " Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 27/39] ubifs: check inode with NULL before using it Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 28/39] ubifs: record quota information about inode in ubifs_new_inode Dongsheng Yang
2015-09-15 9:35 ` Sheng Yong
2015-09-16 1:46 ` Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 29/39] ubifs: free quota inode information in ubifs_evict_inode Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 30/39] ubifs: alloc quota space in ubifs writing path Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 31/39] ubifs: free quota space in do_truncation Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 32/39] ubifs: free quota space when deleting a file Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 33/39] ubifs: adapt quota space informatin in do_setattr Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 34/39] ubifs: transfer quota information in changing owner or group Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 35/39] ubifs: write inode in ubifs_quota_write if we are appending Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 36/39] ubifs: implement ubifs_get_qsize to get quota size in ubifs Dongsheng Yang
2015-09-16 10:00 ` Jan Kara
2015-09-17 7:23 ` Dongsheng Yang
2015-09-17 12:00 ` Jan Kara
2015-09-18 6:14 ` Dongsheng Yang
2015-09-18 11:20 ` Jan Kara
2015-09-21 4:35 ` Dongsheng Yang
2015-09-21 9:13 ` Jan Kara
2015-09-21 9:16 ` Dongsheng Yang
2015-09-21 9:44 ` Jan Kara
2015-09-21 11:02 ` Dongsheng Yang
2015-09-23 7:42 ` Jan Kara
2015-09-24 0:50 ` Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 37/39] ubifs: implement ubifs_restore_iflags for quotactl_operations Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 38/39] ubifs: fill the quota related fields in ubifs_fill_super Dongsheng Yang
2015-09-15 9:02 ` [PATCH v3 39/39] ubifs: introduce quota related mount options Dongsheng Yang
2015-09-15 9:36 ` Sheng Yong
2015-09-16 1:48 ` Dongsheng Yang
2015-10-03 18:57 ` [PATCH v3 00/39] Add quota supporting in ubifs Richard Weinberger
2015-10-04 2:32 ` Dongsheng Yang
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