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 31/32] fscache: Remove the update operation
Date: Mon, 13 Jul 2020 17:36:37 +0100 [thread overview]
Message-ID: <159465819792.1376674.9917789832076544130.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <159465784033.1376674.18106463693989811037.stgit@warthog.procyon.org.uk>
Remove the cache-side of the object update operation as it doesn't
serialise with other setattr, O_TRUNC and write operations.
Signed-off-by: David Howells <dhowells@redhat.com>
---
fs/cachefiles/interface.c | 59 -----------------------------------------
fs/fscache/internal.h | 1 -
fs/fscache/obj.c | 14 ----------
fs/fscache/stats.c | 4 +--
include/linux/fscache-cache.h | 2 -
5 files changed, 1 insertion(+), 79 deletions(-)
diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c
index d4172a40ddc9..21a06dd575ca 100644
--- a/fs/cachefiles/interface.c
+++ b/fs/cachefiles/interface.c
@@ -152,64 +152,6 @@ struct fscache_object *cachefiles_grab_object(struct fscache_object *_object,
return &object->fscache;
}
-/*
- * update the auxiliary data for an object object on disk
- */
-static void cachefiles_update_object(struct fscache_object *_object)
-{
- struct cachefiles_object *object;
- struct cachefiles_cache *cache;
- const struct cred *saved_cred;
- struct inode *inode;
- loff_t object_size, i_size;
- int ret;
-
- _enter("{OBJ%x}", _object->debug_id);
-
- object = container_of(_object, struct cachefiles_object, fscache);
- cache = container_of(object->fscache.cache, struct cachefiles_cache,
- cache);
-
- cachefiles_begin_secure(cache, &saved_cred);
-
- object_size = object->fscache.cookie->object_size;
- inode = d_inode(object->dentry);
- i_size = i_size_read(inode);
- if (i_size > object_size) {
- struct path path = {
- .mnt = cache->mnt,
- .dentry = object->dentry
- };
- _debug("trunc %llx -> %llx", i_size, object_size);
- trace_cachefiles_trunc(object, inode, i_size, object_size);
- ret = vfs_truncate(&path, object_size);
- if (ret < 0) {
- cachefiles_io_error_obj(object, "Trunc-to-size failed");
- cachefiles_remove_object_xattr(cache, object->dentry);
- goto out;
- }
-
- object_size = round_up(object_size, CACHEFILES_DIO_BLOCK_SIZE);
- i_size = i_size_read(inode);
- _debug("trunc %llx -> %llx", i_size, object_size);
- if (i_size < object_size) {
- trace_cachefiles_trunc(object, inode, i_size, object_size);
- ret = vfs_truncate(&path, object_size);
- if (ret < 0) {
- cachefiles_io_error_obj(object, "Trunc-to-dio-size failed");
- cachefiles_remove_object_xattr(cache, object->dentry);
- goto out;
- }
- }
- }
-
- cachefiles_set_object_xattr(object);
-
-out:
- cachefiles_end_secure(cache, saved_cred);
- _leave("");
-}
-
/*
* Shorten the backing object to discard any dirty data and free up
* any unused granules.
@@ -653,7 +595,6 @@ const struct fscache_cache_ops cachefiles_cache_ops = {
.lookup_object = cachefiles_lookup_object,
.free_lookup_data = cachefiles_free_lookup_data,
.grab_object = cachefiles_grab_object,
- .update_object = cachefiles_update_object,
.resize_object = cachefiles_resize_object,
.invalidate_object = cachefiles_invalidate_object,
.drop_object = cachefiles_drop_object,
diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
index eb61e0716e20..ca74b0090e15 100644
--- a/fs/fscache/internal.h
+++ b/fs/fscache/internal.h
@@ -202,7 +202,6 @@ extern atomic_t fscache_n_cop_alloc_object;
extern atomic_t fscache_n_cop_lookup_object;
extern atomic_t fscache_n_cop_create_object;
extern atomic_t fscache_n_cop_invalidate_object;
-extern atomic_t fscache_n_cop_update_object;
extern atomic_t fscache_n_cop_drop_object;
extern atomic_t fscache_n_cop_put_object;
extern atomic_t fscache_n_cop_sync_cache;
diff --git a/fs/fscache/obj.c b/fs/fscache/obj.c
index 139b59472628..a2306f32044c 100644
--- a/fs/fscache/obj.c
+++ b/fs/fscache/obj.c
@@ -54,14 +54,6 @@ static int fscache_do_create_object(struct fscache_object *object, void *data)
return ret;
}
-static void fscache_do_update_object(struct fscache_object *object)
-{
- fscache_stat(&fscache_n_updates_run);
- fscache_stat(&fscache_n_cop_update_object);
- object->cache->ops->update_object(object);
- fscache_stat_d(&fscache_n_cop_update_object);
-}
-
static void fscache_do_drop_object(struct fscache_cache *cache,
struct fscache_object *object,
bool invalidate)
@@ -282,12 +274,6 @@ void fscache_drop_object(struct fscache_cookie *cookie,
_enter("{OBJ%x,%d},%u",
object->debug_id, object->n_children, invalidate);
- if (!invalidate &&
- test_bit(FSCACHE_OBJECT_NEEDS_UPDATE, &object->flags)) {
- _debug("final update");
- fscache_do_update_object(object);
- }
-
spin_lock(&cache->object_list_lock);
list_del_init(&object->cache_link);
spin_unlock(&cache->object_list_lock);
diff --git a/fs/fscache/stats.c b/fs/fscache/stats.c
index 33cea7f527db..f35f22f9a7f3 100644
--- a/fs/fscache/stats.c
+++ b/fs/fscache/stats.c
@@ -50,7 +50,6 @@ atomic_t fscache_n_cop_alloc_object;
atomic_t fscache_n_cop_lookup_object;
atomic_t fscache_n_cop_create_object;
atomic_t fscache_n_cop_invalidate_object;
-atomic_t fscache_n_cop_update_object;
atomic_t fscache_n_cop_drop_object;
atomic_t fscache_n_cop_put_object;
atomic_t fscache_n_cop_sync_cache;
@@ -150,9 +149,8 @@ int fscache_stats_show(struct seq_file *m, void *v)
seq_printf(m, "CacheOp: alo=%d luo=%d\n",
atomic_read(&fscache_n_cop_alloc_object),
atomic_read(&fscache_n_cop_lookup_object));
- seq_printf(m, "CacheOp: inv=%d upo=%d dro=%d pto=%d atc=%d syn=%d\n",
+ seq_printf(m, "CacheOp: inv=%d dro=%d pto=%d atc=%d syn=%d\n",
atomic_read(&fscache_n_cop_invalidate_object),
- atomic_read(&fscache_n_cop_update_object),
atomic_read(&fscache_n_cop_drop_object),
atomic_read(&fscache_n_cop_put_object),
atomic_read(&fscache_n_cop_attr_changed),
diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h
index ba0ad89a968e..14ee82de2d79 100644
--- a/include/linux/fscache-cache.h
+++ b/include/linux/fscache-cache.h
@@ -116,8 +116,6 @@ struct fscache_cache_ops {
/* unpin an object in the cache */
void (*unpin_object)(struct fscache_object *object);
- /* store the updated auxiliary data on an object */
- void (*update_object)(struct fscache_object *object);
/* Change the size of a data object */
void (*resize_object)(struct fscache_object *object, loff_t new_size);
next prev parent reply other threads:[~2020-07-13 16:36 UTC|newest]
Thread overview: 34+ 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 ` [PATCH 01/32] iov_iter: Add ITER_MAPPING 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 ` [PATCH 03/32] vfs: Export rw_verify_area() for use by cachefiles David Howells
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 ` [PATCH 07/32] fscache: Provide a simple thread pool for running ops asynchronously 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 ` [PATCH 11/32] fscache: Keep track of size of a file last set independently on the server David Howells
2020-07-13 16:32 ` [PATCH 12/32] fscache, cachefiles: Fix disabled histogram warnings 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 ` [PATCH 15/32] cachefiles: trace: Log coherency checks 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 ` [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 ` [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 ` [PATCH 23/32] cachefiles: Add I/O tracepoints David Howells
2020-07-13 16:35 ` [PATCH 24/32] fscache: Add read helper 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 ` [PATCH 26/32] fscache: Remove more obsolete stats 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 16:36 ` [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 ` David Howells [this message]
2020-07-13 16:36 ` [PATCH 32/32] cachefiles: Shape write requests David Howells
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=159465819792.1376674.9917789832076544130.stgit@warthog.procyon.org.uk \
--to=dhowells@redhat.com \
--cc=anna.schumaker@netapp.com \
--cc=ceph-devel@vger.kernel.org \
--cc=dwysocha@redhat.com \
--cc=jlayton@redhat.com \
--cc=linux-afs@lists.infradead.org \
--cc=linux-cachefs@redhat.com \
--cc=linux-cifs@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nfs@vger.kernel.org \
--cc=sfrench@samba.org \
--cc=trondmy@hammerspace.com \
--cc=v9fs-developer@lists.sourceforge.net \
--cc=viro@zeniv.linux.org.uk \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).