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Registered in England and Wales under Company Registration No. 3798903 Subject: [RFC PATCH 13/76] fscache: Temporarily disable fscache_invalidate() From: David Howells To: Trond Myklebust , Anna Schumaker , Steve French , Dominique Martinet Cc: dhowells@redhat.com, Jeff Layton , Matthew Wilcox , Alexander Viro , 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 Date: Fri, 20 Nov 2020 15:05:23 +0000 Message-ID: <160588472376.3465195.8251653192186286930.stgit@warthog.procyon.org.uk> In-Reply-To: <160588455242.3465195.3214733858273019178.stgit@warthog.procyon.org.uk> References: <160588455242.3465195.3214733858273019178.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Temporarily disable the fscache side of fscache_invalidate() so that the operation managing code can be removed. Signed-off-by: David Howells --- fs/cachefiles/interface.c | 9 ++--- fs/fscache/cookie.c | 4 +- fs/fscache/object.c | 78 +---------------------------------------- include/linux/fscache-cache.h | 2 + 4 files changed, 7 insertions(+), 86 deletions(-) diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c index 81322e3acadd..99f42d216ef7 100644 --- a/fs/cachefiles/interface.c +++ b/fs/cachefiles/interface.c @@ -388,7 +388,7 @@ static int cachefiles_attr_changed(struct cachefiles_object *object) /* * Invalidate an object */ -static void cachefiles_invalidate_object(struct fscache_operation *op) +static void cachefiles_invalidate_object(struct fscache_object *_object) { struct cachefiles_object *object; struct cachefiles_cache *cache; @@ -397,14 +397,14 @@ static void cachefiles_invalidate_object(struct fscache_operation *op) uint64_t ni_size; int ret; - object = container_of(op->object, struct cachefiles_object, fscache); + object = container_of(_object, struct cachefiles_object, fscache); cache = container_of(object->fscache.cache, struct cachefiles_cache, cache); - ni_size = op->object->cookie->object_size; + ni_size = object->fscache.cookie->object_size; _enter("{OBJ%x},[%llu]", - op->object->debug_id, (unsigned long long)ni_size); + object->fscache.debug_id, (unsigned long long)ni_size); if (object->backer) { ASSERT(d_is_reg(object->backer)); @@ -425,7 +425,6 @@ static void cachefiles_invalidate_object(struct fscache_operation *op) } } - fscache_op_complete(op, true); _leave(""); } diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c index a50fd9e384a6..30394b32a91c 100644 --- a/fs/fscache/cookie.c +++ b/fs/fscache/cookie.c @@ -653,9 +653,7 @@ void __fscache_invalidate(struct fscache_cookie *cookie) object = hlist_entry(cookie->backing_objects.first, struct fscache_object, cookie_link); - if (fscache_object_is_live(object)) - fscache_raise_event( - object, FSCACHE_OBJECT_EV_INVALIDATE); + /* TODO: Do invalidation */ } spin_unlock(&cookie->lock); diff --git a/fs/fscache/object.c b/fs/fscache/object.c index e31164f0446b..5eda1cd265ef 100644 --- a/fs/fscache/object.c +++ b/fs/fscache/object.c @@ -908,86 +908,10 @@ static void fscache_dequeue_object(struct fscache_object *object) _leave(""); } -/* - * Asynchronously invalidate an object. - */ -static const struct fscache_state *_fscache_invalidate_object(struct fscache_object *object, - int event) -{ - struct fscache_operation *op; - struct fscache_cookie *cookie = object->cookie; - - _enter("{OBJ%x},%d", object->debug_id, event); - - /* We're going to need the cookie. If the cookie is not available then - * retire the object instead. - */ - if (!fscache_use_cookie(object)) { - set_bit(FSCACHE_OBJECT_RETIRED, &object->flags); - _leave(" [no cookie]"); - return transit_to(KILL_OBJECT); - } - - /* Reject any new read/write ops and abort any that are pending. */ - clear_bit(FSCACHE_OBJECT_PENDING_WRITE, &object->flags); - fscache_cancel_all_ops(object); - - /* Now we have to wait for in-progress reads and writes */ - op = kzalloc(sizeof(*op), GFP_KERNEL); - if (!op) - goto nomem; - - fscache_operation_init(cookie, op, object->cache->ops->invalidate_object, - NULL, NULL); - op->flags = FSCACHE_OP_ASYNC | - (1 << FSCACHE_OP_EXCLUSIVE) | - (1 << FSCACHE_OP_UNUSE_COOKIE); - - spin_lock(&cookie->lock); - if (fscache_submit_exclusive_op(object, op) < 0) - goto submit_op_failed; - spin_unlock(&cookie->lock); - fscache_put_operation(op); - - /* Once we've completed the invalidation, we know there will be no data - * stored in the cache and thus we can reinstate the data-check-skip - * optimisation. - */ - set_bit(FSCACHE_COOKIE_NO_DATA_YET, &cookie->flags); - - /* We can allow read and write requests to come in once again. They'll - * queue up behind our exclusive invalidation operation. - */ - if (test_and_clear_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) - wake_up_bit(&cookie->flags, FSCACHE_COOKIE_INVALIDATING); - _leave(" [ok]"); - return transit_to(UPDATE_OBJECT); - -nomem: - fscache_mark_object_dead(object); - fscache_unuse_cookie(object); - _leave(" [ENOMEM]"); - return transit_to(KILL_OBJECT); - -submit_op_failed: - fscache_mark_object_dead(object); - spin_unlock(&cookie->lock); - fscache_unuse_cookie(object); - kfree(op); - _leave(" [EIO]"); - return transit_to(KILL_OBJECT); -} - static const struct fscache_state *fscache_invalidate_object(struct fscache_object *object, int event) { - const struct fscache_state *s; - - fscache_stat(&fscache_n_invalidates_run); - fscache_stat(&fscache_n_cop_invalidate_object); - s = _fscache_invalidate_object(object, event); - fscache_stat_d(&fscache_n_cop_invalidate_object); - return s; + return transit_to(UPDATE_OBJECT); } /* diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h index 60b2f8288668..0fbe25b1271b 100644 --- a/include/linux/fscache-cache.h +++ b/include/linux/fscache-cache.h @@ -171,7 +171,7 @@ struct fscache_cache_ops { void (*update_object)(struct fscache_object *object); /* Invalidate an object */ - void (*invalidate_object)(struct fscache_operation *op); + void (*invalidate_object)(struct fscache_object *object); /* discard the resources pinned by an object and effect retirement if * necessary */