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 25/32] fscache: Display cache-specific data in /proc/fs/fscache/objects
Date: Mon, 13 Jul 2020 17:35:20 +0100 [thread overview]
Message-ID: <159465812047.1376674.773368234437370021.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <159465784033.1376674.18106463693989811037.stgit@warthog.procyon.org.uk>
Allow the cache to add information in /proc/fs/fscache/objects instead of
displaying cookie key and aux data - which can be seen in the cookies file.
Signed-off-by: David Howells <dhowells@redhat.com>
---
fs/cachefiles/content-map.c | 41 +++++++++++++++++++++++++++++++++++++++++
fs/cachefiles/interface.c | 1 +
fs/cachefiles/internal.h | 1 +
fs/fscache/object-list.c | 33 +++------------------------------
include/linux/fscache-cache.h | 4 ++++
5 files changed, 50 insertions(+), 30 deletions(-)
diff --git a/fs/cachefiles/content-map.c b/fs/cachefiles/content-map.c
index 91c44bb39a93..f2a10e8d8d6d 100644
--- a/fs/cachefiles/content-map.c
+++ b/fs/cachefiles/content-map.c
@@ -396,3 +396,44 @@ void cachefiles_save_content_map(struct cachefiles_object *object)
_leave(" = %zd", ret);
}
+
+/*
+ * Display object information in proc.
+ */
+int cachefiles_display_object(struct seq_file *m, struct fscache_object *_object)
+{
+ struct cachefiles_object *object =
+ container_of(_object, struct cachefiles_object, fscache);
+
+ if (object->fscache.cookie->type == FSCACHE_COOKIE_TYPE_INDEX) {
+ if (object->content_info != CACHEFILES_CONTENT_NO_DATA)
+ seq_printf(m, " ???%u???", object->content_info);
+ } else {
+ switch (object->content_info) {
+ case CACHEFILES_CONTENT_NO_DATA:
+ seq_puts(m, " <n>");
+ break;
+ case CACHEFILES_CONTENT_SINGLE:
+ seq_puts(m, " <s>");
+ break;
+ case CACHEFILES_CONTENT_ALL:
+ seq_puts(m, " <a>");
+ break;
+ case CACHEFILES_CONTENT_MAP:
+ read_lock_bh(&object->content_map_lock);
+ if (object->content_map) {
+ seq_printf(m, " %*phN",
+ object->content_map_size,
+ object->content_map);
+ }
+ read_unlock_bh(&object->content_map_lock);
+ break;
+ default:
+ seq_printf(m, " <%u>", object->content_info);
+ break;
+ }
+ }
+
+ seq_putc(m, '\n');
+ return 0;
+}
diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c
index e73de62d0e73..78180d269c5f 100644
--- a/fs/cachefiles/interface.c
+++ b/fs/cachefiles/interface.c
@@ -491,4 +491,5 @@ const struct fscache_cache_ops cachefiles_cache_ops = {
.shape_request = cachefiles_shape_request,
.read = cachefiles_read,
.write = cachefiles_write,
+ .display_object = cachefiles_display_object,
};
diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h
index 2ea469b77712..c91a9b3c5bd5 100644
--- a/fs/cachefiles/internal.h
+++ b/fs/cachefiles/internal.h
@@ -132,6 +132,7 @@ extern void cachefiles_expand_content_map(struct cachefiles_object *object, loff
extern void cachefiles_shorten_content_map(struct cachefiles_object *object, loff_t new_size);
extern bool cachefiles_load_content_map(struct cachefiles_object *object);
extern void cachefiles_save_content_map(struct cachefiles_object *object);
+extern int cachefiles_display_object(struct seq_file *m, struct fscache_object *object);
/*
* daemon.c
diff --git a/fs/fscache/object-list.c b/fs/fscache/object-list.c
index 5777f909d31a..361610e124bd 100644
--- a/fs/fscache/object-list.c
+++ b/fs/fscache/object-list.c
@@ -155,7 +155,6 @@ static int fscache_objlist_show(struct seq_file *m, void *v)
struct fscache_cookie *cookie;
unsigned long config = data->config;
char _type[3], *type;
- u8 *p;
if ((unsigned long) v == 1) {
seq_puts(m, "OBJECT PARENT USE CHLDN OPS FL S"
@@ -201,8 +200,6 @@ static int fscache_objlist_show(struct seq_file *m, void *v)
obj->stage);
if (obj->cookie) {
- uint16_t keylen = 0, auxlen = 0;
-
switch (cookie->type) {
case 0:
type = "IX";
@@ -211,8 +208,7 @@ static int fscache_objlist_show(struct seq_file *m, void *v)
type = "DT";
break;
default:
- snprintf(_type, sizeof(_type), "%02u",
- cookie->type);
+ snprintf(_type, sizeof(_type), "%02x", cookie->type);
type = _type;
break;
}
@@ -223,34 +219,11 @@ static int fscache_objlist_show(struct seq_file *m, void *v)
type,
cookie->stage,
cookie->flags);
-
- if (config & FSCACHE_OBJLIST_CONFIG_KEY)
- keylen = cookie->key_len;
-
- if (config & FSCACHE_OBJLIST_CONFIG_AUX)
- auxlen = cookie->aux_len;
-
- if (keylen > 0 || auxlen > 0) {
- seq_puts(m, " ");
- p = keylen <= sizeof(cookie->inline_key) ?
- cookie->inline_key : cookie->key;
- for (; keylen > 0; keylen--)
- seq_printf(m, "%02x", *p++);
- if (auxlen > 0) {
- if (config & FSCACHE_OBJLIST_CONFIG_KEY)
- seq_puts(m, ", ");
- p = auxlen <= sizeof(cookie->inline_aux) ?
- cookie->inline_aux : cookie->aux;
- for (; auxlen > 0; auxlen--)
- seq_printf(m, "%02x", *p++);
- }
- }
-
- seq_puts(m, "\n");
} else {
seq_puts(m, "<no_netfs>\n");
}
- return 0;
+
+ return obj->cache->ops->display_object(m, obj);
}
static const struct seq_operations fscache_objlist_ops = {
diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h
index 81a41e37f07b..1357c44d371b 100644
--- a/include/linux/fscache-cache.h
+++ b/include/linux/fscache-cache.h
@@ -19,6 +19,7 @@
#define NR_MAXCACHES BITS_PER_LONG
+struct seq_file;
struct fscache_cache;
struct fscache_cache_ops;
struct fscache_object;
@@ -151,6 +152,9 @@ struct fscache_cache_ops {
int (*write)(struct fscache_object *object,
struct fscache_io_request *req,
struct iov_iter *iter);
+
+ /* Display object info in /proc/fs/fscache/objects */
+ int (*display_object)(struct seq_file *m, struct fscache_object *object);
};
extern struct fscache_cookie fscache_fsdef_index;
next prev parent reply other threads:[~2020-07-13 16:35 UTC|newest]
Thread overview: 35+ 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 08/32] fscache: Replace the object management state machine 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 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 ` David Howells [this message]
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 ` [PATCH 31/32] fscache: Remove the update operation David Howells
[not found] ` <159465784033.1376674.18106463693989811037.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2020-07-13 16:33 ` [PATCH 16/32] cachefiles: Split cachefiles_drop_object() up a bit David Howells
2020-07-13 16:36 ` [PATCH 32/32] cachefiles: Shape write requests David Howells
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