From: Al Viro <viro@zeniv.linux.org.uk>
To: linux-fsdevel@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Gabriel Krisman Bertazi <krisman@kernel.org>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
David Howells <dhowells@redhat.com>,
ceph-devel@vger.kernel.org, linux-nfs@vger.kernel.org,
Amir Goldstein <amir73il@gmail.com>,
Miklos Szeredi <miklos@szeredi.hu>,
Andreas Gruenbacher <agruenba@redhat.com>,
Mike Marshall <hubcap@omnibond.com>
Subject: [PATCHES v3][RFC][CFT] ->d_revalidate() calling conventions changes (->d_parent/->d_name stability problems)
Date: Thu, 23 Jan 2025 01:45:11 +0000 [thread overview]
Message-ID: <20250123014511.GA1962481@ZenIV> (raw)
In-Reply-To: <20250116052103.GF1977892@ZenIV>
Series updated and force-pushed to the same place:
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git #work.d_revalidate
itself on top of #work.dcache.
Individual patches in followups; please, review.
Changes since v2:
* document that stable name passed to ->d_revalidate() may be followed by '/'
rather than NUL - in normal case it's given a pathname component in the
pathname being resolved and it doesn't have to be the last one. Basically,
it's the situation as for ->d_hash() and ->d_compare() - ->len should not
be ignored. AFS, FUSE and orangefs patches in the series ran afoul of that;
spotted (in AFS case) by dhowells. Fixed; in case of afs it used to end up
with incorrect debugging printk, in case of fuse and orangefs - stray invalidations,
unfortunately not caught by testing.
Changes since v1:
* reordered external_name members to get rid of hole on 64bit, as suggested by
dhowells.
* split the added method in two in the last commit ("9p: fix ->rename_sem exclusion")
next prev parent reply other threads:[~2025-01-23 1:45 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-10 2:38 [PATCHES][RFC][CFT] ->d_revalidate() calling conventions changes (->d_parent/->d_name stability problems) Al Viro
2025-01-10 2:42 ` [PATCH 01/20] make sure that DNAME_INLINE_LEN is a multiple of word size Al Viro
2025-01-10 2:42 ` [PATCH 02/20] dcache: back inline names with a struct-wrapped array of unsigned long Al Viro
2025-01-10 9:35 ` Jan Kara
2025-01-10 16:24 ` Al Viro
2025-01-10 2:42 ` [PATCH 03/20] make take_dentry_name_snapshot() lockless Al Viro
2025-01-10 9:45 ` Jan Kara
2025-01-10 2:42 ` [PATCH 04/20] dissolve external_name.u into separate members Al Viro
2025-01-10 7:34 ` David Howells
2025-01-10 16:46 ` Al Viro
2025-01-10 2:42 ` [PATCH 05/20] ext4 fast_commit: make use of name_snapshot primitives Al Viro
2025-01-10 9:15 ` Jan Kara
2025-01-10 2:42 ` [PATCH 06/20] generic_ci_d_compare(): use shortname_storage Al Viro
2025-01-10 2:42 ` [PATCH 07/20] Pass parent directory inode and expected name to ->d_revalidate() Al Viro
2025-01-10 2:42 ` [PATCH 08/20] afs_d_revalidate(): use stable name and parent inode passed by caller Al Viro
2025-01-10 2:42 ` [PATCH 09/20] ceph_d_revalidate(): use stable " Al Viro
2025-01-10 19:45 ` Viacheslav Dubeyko
2025-01-10 2:42 ` [PATCH 10/20] ceph_d_revalidate(): propagate stable name down into request enconding Al Viro
2025-01-10 2:42 ` [PATCH 11/20] fscrypt_d_revalidate(): use stable parent inode passed by caller Al Viro
2025-01-10 2:42 ` [PATCH 12/20] exfat_d_revalidate(): " Al Viro
2025-01-10 2:42 ` [PATCH 13/20] vfat_revalidate{,_ci}(): " Al Viro
2025-01-10 2:42 ` [PATCH 14/20] fuse_dentry_revalidate(): use stable parent inode and name " Al Viro
2025-01-10 2:42 ` [PATCH 15/20] gfs2_drevalidate(): " Al Viro
2025-01-10 19:20 ` Andreas Grünbacher
2025-01-10 2:42 ` [PATCH 16/20] nfs{,4}_lookup_validate(): use stable parent inode " Al Viro
2025-01-10 2:43 ` [PATCH 17/20] nfs: fix ->d_revalidate() UAF on ->d_name accesses Al Viro
2025-01-10 2:43 ` [PATCH 18/20] ocfs2_dentry_revalidate(): use stable parent inode and name passed by caller Al Viro
2025-01-10 9:54 ` Jan Kara
2025-01-10 2:43 ` [PATCH 19/20] orangefs_d_revalidate(): " Al Viro
2025-01-10 3:06 ` Linus Torvalds
2025-01-10 2:43 ` [PATCH 20/20] 9p: fix ->rename_sem exclusion Al Viro
2025-01-10 3:11 ` Linus Torvalds
2025-01-10 5:53 ` Al Viro
2025-01-10 9:21 ` [PATCH 01/20] make sure that DNAME_INLINE_LEN is a multiple of word size Jan Kara
2025-01-16 5:21 ` [PATCHES v2][RFC][CFT] ->d_revalidate() calling conventions changes (->d_parent/->d_name stability problems) Al Viro
2025-01-16 5:22 ` [PATCH v2 01/20] make sure that DNAME_INLINE_LEN is a multiple of word size Al Viro
2025-01-16 5:22 ` [PATCH v2 02/20] dcache: back inline names with a struct-wrapped array of unsigned long Al Viro
2025-01-16 5:23 ` [PATCH v2 03/20] make take_dentry_name_snapshot() lockless Al Viro
2025-01-16 5:23 ` [PATCH v2 04/20] dissolve external_name.u into separate members Al Viro
2025-01-16 10:06 ` Jan Kara
2025-01-16 5:23 ` [PATCH v2 05/20] ext4 fast_commit: make use of name_snapshot primitives Al Viro
2025-01-16 5:23 ` [PATCH v2 06/20] generic_ci_d_compare(): use shortname_storage Al Viro
2025-01-16 15:38 ` Gabriel Krisman Bertazi
2025-01-16 15:46 ` Al Viro
2025-01-16 15:53 ` Gabriel Krisman Bertazi
2025-01-16 5:23 ` [PATCH v2 07/20] Pass parent directory inode and expected name to ->d_revalidate() Al Viro
2025-01-16 15:15 ` Gabriel Krisman Bertazi
2025-01-17 18:55 ` Jeff Layton
2025-01-17 19:00 ` Al Viro
2025-01-16 5:23 ` [PATCH v2 08/20] afs_d_revalidate(): use stable name and parent inode passed by caller Al Viro
2025-01-22 20:27 ` David Howells
2025-01-22 21:01 ` Al Viro
2025-01-22 21:24 ` Al Viro
2025-01-22 21:55 ` David Howells
2025-01-16 5:23 ` [PATCH v2 09/20] ceph_d_revalidate(): use stable " Al Viro
2025-01-17 18:35 ` Jeff Layton
2025-01-16 5:23 ` [PATCH v2 10/20] ceph_d_revalidate(): propagate stable name down into request enconding Al Viro
2025-01-17 18:35 ` Jeff Layton
2025-01-16 5:23 ` [PATCH v2 11/20] fscrypt_d_revalidate(): use stable parent inode passed by caller Al Viro
2025-01-17 15:20 ` Jeff Layton
2025-01-16 5:23 ` [PATCH v2 12/20] exfat_d_revalidate(): " Al Viro
2025-01-16 5:23 ` [PATCH v2 13/20] vfat_revalidate{,_ci}(): " Al Viro
2025-01-17 15:22 ` Jeff Layton
2025-01-16 5:23 ` [PATCH v2 14/20] fuse_dentry_revalidate(): use stable parent inode and name " Al Viro
2025-01-17 15:18 ` Jeff Layton
2025-01-16 5:23 ` [PATCH v2 15/20] gfs2_drevalidate(): " Al Viro
2025-01-16 5:23 ` [PATCH v2 16/20] nfs{,4}_lookup_validate(): use stable parent inode " Al Viro
2025-01-17 14:05 ` Jeff Layton
2025-01-16 5:23 ` [PATCH v2 17/20] nfs: fix ->d_revalidate() UAF on ->d_name accesses Al Viro
2025-01-17 15:12 ` Jeff Layton
2025-01-16 5:23 ` [PATCH v2 18/20] ocfs2_dentry_revalidate(): use stable parent inode and name passed by caller Al Viro
2025-01-16 5:23 ` [PATCH v2 19/20] orangefs_d_revalidate(): " Al Viro
2025-01-16 5:23 ` [PATCH v2 20/20] 9p: fix ->rename_sem exclusion Al Viro
2025-01-23 1:45 ` Al Viro [this message]
2025-01-23 1:46 ` [PATCH v3 01/20] make sure that DNAME_INLINE_LEN is a multiple of word size Al Viro
2025-01-23 1:46 ` [PATCH v3 02/20] dcache: back inline names with a struct-wrapped array of unsigned long Al Viro
2025-01-23 1:46 ` [PATCH v3 03/20] make take_dentry_name_snapshot() lockless Al Viro
2025-01-23 1:46 ` [PATCH v3 04/20] dissolve external_name.u into separate members Al Viro
2025-01-23 1:46 ` [PATCH v3 05/20] ext4 fast_commit: make use of name_snapshot primitives Al Viro
2025-01-23 1:46 ` [PATCH v3 06/20] generic_ci_d_compare(): use shortname_storage Al Viro
2025-01-23 1:46 ` [PATCH v3 07/20] Pass parent directory inode and expected name to ->d_revalidate() Al Viro
2025-01-23 1:46 ` [PATCH v3 08/20] afs_d_revalidate(): use stable name and parent inode passed by caller Al Viro
2025-01-23 1:46 ` [PATCH v3 09/20] ceph_d_revalidate(): use stable " Al Viro
2025-01-23 1:46 ` [PATCH v3 10/20] ceph_d_revalidate(): propagate stable name down into request encoding Al Viro
2025-01-23 1:46 ` [PATCH v3 11/20] fscrypt_d_revalidate(): use stable parent inode passed by caller Al Viro
2025-01-23 1:46 ` [PATCH v3 12/20] exfat_d_revalidate(): " Al Viro
2025-01-23 1:46 ` [PATCH v3 13/20] vfat_revalidate{,_ci}(): " Al Viro
2025-01-23 1:46 ` [PATCH v3 14/20] fuse_dentry_revalidate(): use stable parent inode and name " Al Viro
2025-01-23 10:51 ` Miklos Szeredi
2025-01-23 1:46 ` [PATCH v3 15/20] gfs2_drevalidate(): " Al Viro
2025-01-23 1:46 ` [PATCH v3 16/20] nfs{,4}_lookup_validate(): use stable parent inode " Al Viro
2025-01-23 1:46 ` [PATCH v3 17/20] nfs: fix ->d_revalidate() UAF on ->d_name accesses Al Viro
2025-01-23 1:46 ` [PATCH v3 18/20] ocfs2_dentry_revalidate(): use stable parent inode and name passed by caller Al Viro
2025-01-23 1:46 ` [PATCH v3 19/20] orangefs_d_revalidate(): " Al Viro
2025-01-25 16:25 ` Mike Marshall
2025-01-23 1:46 ` [PATCH v3 20/20] 9p: fix ->rename_sem exclusion Al Viro
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