From: David Howells <dhowells@redhat.com>
To: Trond Myklebust <trondmy@hammerspace.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
Steve French <sfrench@samba.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Matthew Wilcox <willy@infradead.org>
Cc: Jeff Layton <jlayton@redhat.com>,
Dave Wysochanski <dwysocha@redhat.com>,
dhowells@redhat.com, linux-cachefs@redhat.com,
linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org,
linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org,
v9fs-developer@lists.sourceforge.net,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 04/32] vfs: Provide S_CACHE_FILE inode flag
Date: Mon, 13 Jul 2020 17:31:24 +0100 [thread overview]
Message-ID: <159465788421.1376674.17851071117062513659.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <159465784033.1376674.18106463693989811037.stgit@warthog.procyon.org.uk>
Provide an S_CACHE_FILE inode flag that cachefiles can set to ward off
other kernel services and drivers (including itself) from using its cache
files.
Signed-off-by: David Howells <dhowells@redhat.com>
---
include/linux/fs.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index aa3e3af92220..33d30742b26e 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2003,6 +2003,7 @@ struct super_operations {
#define S_ENCRYPTED 16384 /* Encrypted file (using fs/crypto/) */
#define S_CASEFOLD 32768 /* Casefolded file */
#define S_VERITY 65536 /* Verity file (using fs/verity/) */
+#define S_CACHE_FILE 0x20000 /* File is in use as cache file (eg. fs/cachefiles) */
/*
* Note that nosuid etc flags are inode-specific: setting some file-system
WARNING: multiple messages have this Message-ID (diff)
From: David Howells <dhowells@redhat.com>
To: Trond Myklebust <trondmy@hammerspace.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
Steve French <sfrench@samba.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Matthew Wilcox <willy@infradead.org>
Cc: linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-cachefs@redhat.com,
linux-fsdevel@vger.kernel.org,
v9fs-developer@lists.sourceforge.net, ceph-devel@vger.kernel.org,
linux-afs@lists.infradead.org
Subject: [PATCH 04/32] vfs: Provide S_CACHE_FILE inode flag
Date: Mon, 13 Jul 2020 17:31:24 +0100 [thread overview]
Message-ID: <159465788421.1376674.17851071117062513659.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <159465784033.1376674.18106463693989811037.stgit@warthog.procyon.org.uk>
Provide an S_CACHE_FILE inode flag that cachefiles can set to ward off
other kernel services and drivers (including itself) from using its cache
files.
Signed-off-by: David Howells <dhowells@redhat.com>
---
include/linux/fs.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index aa3e3af92220..33d30742b26e 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2003,6 +2003,7 @@ struct super_operations {
#define S_ENCRYPTED 16384 /* Encrypted file (using fs/crypto/) */
#define S_CASEFOLD 32768 /* Casefolded file */
#define S_VERITY 65536 /* Verity file (using fs/verity/) */
+#define S_CACHE_FILE 0x20000 /* File is in use as cache file (eg. fs/cachefiles) */
/*
* Note that nosuid etc flags are inode-specific: setting some file-system
next prev parent reply other threads:[~2020-07-13 16:31 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-13 16:30 [PATCH 00/32] fscache: Rewrite 2: Make the I/O interface use kiocb/iov_iter David Howells
2020-07-13 16:30 ` David Howells
2020-07-13 16:30 ` [PATCH 01/32] iov_iter: Add ITER_MAPPING David Howells
2020-07-13 16:30 ` David Howells
2020-07-19 1:44 ` Al Viro
2020-07-19 9:51 ` David Howells
2020-07-13 16:31 ` [PATCH 02/32] vm: Add wait/unlock functions for PG_fscache David Howells
2020-07-13 16:31 ` David Howells
2020-07-13 16:31 ` [PATCH 03/32] vfs: Export rw_verify_area() for use by cachefiles David Howells
2020-07-13 16:31 ` David Howells [this message]
2020-07-13 16:31 ` [PATCH 04/32] vfs: Provide S_CACHE_FILE inode flag David Howells
2020-07-13 16:31 ` [PATCH 05/32] mm: Provide lru_to_last_page() to get last of a page list David Howells
2020-07-13 16:31 ` [PATCH 06/32] cachefiles: Remove tree of active files and use S_CACHE_FILE inode flag David Howells
2020-07-13 16:31 ` David Howells
2020-07-13 16:31 ` [PATCH 07/32] fscache: Provide a simple thread pool for running ops asynchronously David Howells
2020-07-13 16:32 ` [PATCH 08/32] fscache: Replace the object management state machine David Howells
2020-07-13 16:32 ` David Howells
2020-07-13 16:32 ` [PATCH 09/32] fscache: Rewrite the I/O API based on iov_iter David Howells
2020-07-13 16:32 ` [PATCH 10/32] fscache: Remove fscache_wait_on_invalidate() David Howells
2020-07-13 16:32 ` David Howells
2020-07-13 16:32 ` [PATCH 11/32] fscache: Keep track of size of a file last set independently on the server David Howells
2020-07-13 16:32 ` David Howells
2020-07-13 16:32 ` [PATCH 12/32] fscache, cachefiles: Fix disabled histogram warnings David Howells
2020-07-13 16:32 ` David Howells
2020-07-13 16:33 ` [PATCH 13/32] fscache: Recast assertion in terms of cookie not being an index David Howells
2020-07-13 16:33 ` [PATCH 14/32] cachefiles: Remove some redundant checks on unsigned values David Howells
2020-07-13 16:33 ` David Howells
2020-07-13 16:33 ` [PATCH 15/32] cachefiles: trace: Log coherency checks David Howells
2020-07-13 16:33 ` David Howells
2020-07-13 16:33 ` [PATCH 16/32] cachefiles: Split cachefiles_drop_object() up a bit David Howells
2020-07-13 16:33 ` David Howells
2020-07-13 16:33 ` [PATCH 17/32] cachefiles: Implement new fscache I/O backend API David Howells
2020-07-13 16:33 ` [PATCH 18/32] cachefiles: Merge object->backer into object->dentry David Howells
2020-07-13 16:34 ` [PATCH 19/32] cachefiles: Implement a content-present indicator and bitmap David Howells
2020-07-13 16:34 ` David Howells
2020-07-13 16:34 ` [PATCH 20/32] cachefiles: Implement extent shaper David Howells
2020-07-13 16:34 ` [PATCH 21/32] cachefiles: Round the cachefile size up to DIO block size David Howells
2020-07-13 16:34 ` [PATCH 22/32] cachefiles: Implement read and write parts of new I/O API David Howells
2020-07-13 16:34 ` David Howells
2020-07-13 16:34 ` [PATCH 23/32] cachefiles: Add I/O tracepoints David Howells
2020-07-13 16:34 ` David Howells
2020-07-13 16:35 ` [PATCH 24/32] fscache: Add read helper David Howells
2020-07-13 16:35 ` David Howells
2020-07-13 16:35 ` [PATCH 25/32] fscache: Display cache-specific data in /proc/fs/fscache/objects David Howells
2020-07-13 16:35 ` David Howells
2020-07-13 16:35 ` [PATCH 26/32] fscache: Remove more obsolete stats David Howells
2020-07-13 16:35 ` David Howells
2020-07-13 16:35 ` [PATCH 27/32] fscache: New stats David Howells
2020-07-13 16:35 ` [PATCH 28/32] fscache, cachefiles: Rewrite invalidation David Howells
2020-07-13 16:35 ` David Howells
2020-07-13 16:36 ` [PATCH 29/32] fscache: Implement "will_modify" parameter on fscache_use_cookie() David Howells
2020-07-13 16:36 ` [PATCH 30/32] fscache: Provide resize operation David Howells
2020-07-13 16:36 ` [PATCH 31/32] fscache: Remove the update operation David Howells
2020-07-13 16:36 ` [PATCH 32/32] cachefiles: Shape write requests David Howells
2020-07-13 16:36 ` David Howells
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