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Wed, 4 Mar 2026 22:29:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772663388; bh=4g9Hc6BCi1UzcQ6UmFUsAKXtEqFK6/wIIRnu62xorDM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=H7E6g6Lm08bdby4/2tHEolh5uuAfzAVSsM3yLpncdqLzpMpx2R/jiaVVx3BrpUlHV zLgQZLl3q+J8YOTxOWa4cFn0qM9qtzHl3urpYxu/J8dk/Ng4eTR5ve5/MwMG2EM0x4 13hRsUgqaHxQn1bDCNJafYTopHM59GSiSSfWDaMrsTRgNMP0a8wibVOr0aBrw1II97 INDpQBDBhw/6g/ZfJeCr4GjGF8S8trfaYHGCsvv3rBpIoZHp4hfWrZiyJa1NX9T5Ya lxm3zNjb7ZsIhtDD0mqurpzxaf9es4FePOHSAnjX78l7+ajL920pZ2wjsA901PjGJl 9YO9TEkdx8L9Q== Date: Wed, 4 Mar 2026 17:29:46 -0500 From: Mike Snitzer To: Jeff Layton Cc: Luis de Bethencourt , Salah Triki , Nicolas Pitre , Christoph Hellwig , Jan Kara , Anders Larsen , Alexander Viro , Christian Brauner , David Sterba , Chris Mason , Gao Xiang , Chao Yu , Yue Hu , Jeffle Xu , Sandeep Dhavale , Hongbo Li , Chunhai Guo , Jan Kara , Theodore Ts'o , Andreas Dilger , Jaegeuk Kim , OGAWA Hirofumi , David Woodhouse , Richard Weinberger , Dave Kleikamp , Ryusuke Konishi , Viacheslav Dubeyko , Konstantin Komarov , Mark Fasheh , Joel Becker , Joseph Qi , Mike Marshall , Martin Brandenburg , Miklos Szeredi , Amir Goldstein , Phillip Lougher , Carlos Maiolino , Hugh Dickins , Baolin Wang , Andrew Morton , Namjae Jeon , Sungjong Seo , Yuezhang Mo , Chuck Lever , Alexander Aring , Andreas Gruenbacher , Jonathan Corbet , "Matthew Wilcox (Oracle)" , Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , Xiubo Li , Ilya Dryomov , Trond Myklebust , Anna Schumaker , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Bharath SM , Hans de Goede , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@lists.linux.dev, devel@lists.orangefs.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, gfs2@lists.linux.dev, linux-doc@vger.kernel.org, v9fs@lists.linux.dev, ceph-devel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org Subject: Re: [PATCH 24/24] fs: remove simple_nosetlease() Message-ID: References: <20260108-setlease-6-20-v1-0-ea4dec9b67fa@kernel.org> <20260108-setlease-6-20-v1-24-ea4dec9b67fa@kernel.org> X-Mailing-List: linux-erofs@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, Mar 04, 2026 at 11:59:32AM -0500, Jeff Layton wrote: > On Wed, 2026-02-25 at 12:58 -0500, Mike Snitzer wrote: > > On Thu, Jan 08, 2026 at 12:13:19PM -0500, Jeff Layton wrote: > > > Setting ->setlease() to a NULL pointer now has the same effect as > > > setting it to simple_nosetlease(). Remove all of the setlease > > > file_operations that are set to simple_nosetlease, and the function > > > itself. > > > > > > Signed-off-by: Jeff Layton > > > --- > > > fs/9p/vfs_dir.c | 2 -- > > > fs/9p/vfs_file.c | 2 -- > > > fs/ceph/dir.c | 2 -- > > > fs/ceph/file.c | 1 - > > > fs/fuse/dir.c | 1 - > > > fs/gfs2/file.c | 2 -- > > > fs/libfs.c | 18 ------------------ > > > fs/nfs/dir.c | 1 - > > > fs/nfs/file.c | 1 - > > > fs/smb/client/cifsfs.c | 1 - > > > fs/vboxsf/dir.c | 1 - > > > fs/vboxsf/file.c | 1 - > > > include/linux/fs.h | 1 - > > > 13 files changed, 34 deletions(-) > > > > > > > > > > > > diff --git a/fs/libfs.c b/fs/libfs.c > > > index 697c6d5fc12786c036f0086886297fb5cd52ae00..f1860dff86f2703266beecf31e9d2667af7a9684 100644 > > > --- a/fs/libfs.c > > > +++ b/fs/libfs.c > > > @@ -1699,24 +1699,6 @@ struct inode *alloc_anon_inode(struct super_block *s) > > > } > > > EXPORT_SYMBOL(alloc_anon_inode); > > > > > > -/** > > > - * simple_nosetlease - generic helper for prohibiting leases > > > - * @filp: file pointer > > > - * @arg: type of lease to obtain > > > - * @flp: new lease supplied for insertion > > > - * @priv: private data for lm_setup operation > > > - * > > > - * Generic helper for filesystems that do not wish to allow leases to be set. > > > - * All arguments are ignored and it just returns -EINVAL. > > > - */ > > > -int > > > -simple_nosetlease(struct file *filp, int arg, struct file_lease **flp, > > > - void **priv) > > > -{ > > > - return -EINVAL; > > > -} > > > -EXPORT_SYMBOL(simple_nosetlease); > > > - > > > /** > > > * simple_get_link - generic helper to get the target of "fast" symlinks > > > * @dentry: not used here > > > diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c > > > index 71df279febf797880ded19e45528c3df4cea2dde..23a78a742b619dea8b76ddf28f4f59a1c8a015e2 100644 > > > --- a/fs/nfs/dir.c > > > +++ b/fs/nfs/dir.c > > > @@ -66,7 +66,6 @@ const struct file_operations nfs_dir_operations = { > > > .open = nfs_opendir, > > > .release = nfs_closedir, > > > .fsync = nfs_fsync_dir, > > > - .setlease = simple_nosetlease, > > > }; > > > > > > const struct address_space_operations nfs_dir_aops = { > > > diff --git a/fs/nfs/file.c b/fs/nfs/file.c > > > index d020aab40c64ebda30d130b6acee1b9194621457..9d269561961825f88529551b0f0287920960ac62 100644 > > > --- a/fs/nfs/file.c > > > +++ b/fs/nfs/file.c > > > @@ -962,7 +962,6 @@ const struct file_operations nfs_file_operations = { > > > .splice_read = nfs_file_splice_read, > > > .splice_write = iter_file_splice_write, > > > .check_flags = nfs_check_flags, > > > - .setlease = simple_nosetlease, > > > .fop_flags = FOP_DONTCACHE, > > > }; > > > EXPORT_SYMBOL_GPL(nfs_file_operations); > > > > Hey Jeff, > > > > I've noticed an NFS reexport regression in v6.19 and now v7.0-rc1 > > (similar but different due to your series that requires opt-in via > > .setlease). > > > > Bisect first pointed out this commit: > > 10dcd5110678 nfs: properly disallow delegation requests on directories > > > > And now with v7.0-rc1 its the fact that NFS doesn't provide .setlease > > so lstat() on parent dir (of file that I touch) gets -EINVAL. > > > > So its a confluence of NFS's dir delegations and your setlease changes. > > > > If I reexport NFSv4.2 filesystem in terms of NFSv4.1, the regression > > is seen by doing (lstat reproducer that gemini spit out for me is > > attached): > > > > $ touch /mnt/share41/test > > $ strace ./lstat /mnt/share41 > > ... > > lstat("/mnt/share41", 0x7ffec0d79920) = -1 EINVAL (Invalid argument) > > > > If I immediately re-run it works: > > ... > > lstat("/mnt/share41", {st_mode=S_IFDIR|0777, st_size=4096, ...}) = 0 > > > > I'm not sure what the proper fix is yet, but I feel like you've missed > > that NFS itself can be (re)exported? > > > > > > My apologies. I missed seeing this last week. > > That's a very simple reproducer! That's very strange behavior, > especially since NFS4 does provide a setlease operation: > > const struct file_operations nfs4_file_operations = { > [...] > .setlease = nfs4_setlease, > [...] > }; Huh, not sure how I missed nfs4_setlease... > I'm not sure why this would cause lstat() to return -EINVAL. Likewise, especially given nfs4_setlease > What's happening on the wire when this occurs? > > I'll plan to take a look here soon either way. I'll have to revisit myself, been a bit. Will let you know. Thanks, Mike