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authorDavid Howells <dhowells@redhat.com>2021-10-21 01:10:46 +0300
committerDavid Howells <dhowells@redhat.com>2022-01-07 12:22:19 +0300
commited1235eb78a7421cd0ac2ad09e931f8f07ccdc7c (patch)
treee33e59dce860d027a3ea48ba68f39e9e71f5ea2b /include/linux/fscache.h
parent8e7a867bb7309fbf47e8c2a68798b919fc02523f (diff)
downloadlinux-ed1235eb78a7421cd0ac2ad09e931f8f07ccdc7c.tar.xz
fscache: Provide a function to let the netfs update its coherency data
Provide a function to let the netfs update its coherency data: void fscache_update_cookie(struct fscache_cookie *cookie, const void *aux_data, const loff_t *object_size); This will update the auxiliary data and/or the size of the object attached to a cookie if either pointer is not-NULL and flag that the disk needs to be updated. Note that fscache_unuse_cookie() also allows this to be done. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/163819610438.215744.4223265964131424954.stgit@warthog.procyon.org.uk/ # v1 Link: https://lore.kernel.org/r/163906913530.143852.18150303220217653820.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/163967117795.1823006.7493373142653442595.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/164021518440.640689.6369952464473039268.stgit@warthog.procyon.org.uk/ # v4
Diffstat (limited to 'include/linux/fscache.h')
-rw-r--r--include/linux/fscache.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/fscache.h b/include/linux/fscache.h
index 7cdc63c4fe35..fc77648c8af6 100644
--- a/include/linux/fscache.h
+++ b/include/linux/fscache.h
@@ -339,6 +339,28 @@ void __fscache_update_cookie(struct fscache_cookie *cookie, const void *aux_data
}
/**
+ * fscache_update_cookie - Request that a cache object be updated
+ * @cookie: The cookie representing the cache object
+ * @aux_data: The updated auxiliary data for the cookie (may be NULL)
+ * @object_size: The current size of the object (may be NULL)
+ *
+ * Request an update of the index data for the cache object associated with the
+ * cookie. The auxiliary data on the cookie will be updated first if @aux_data
+ * is set and the object size will be updated and the object possibly trimmed
+ * if @object_size is set.
+ *
+ * See Documentation/filesystems/caching/netfs-api.rst for a complete
+ * description.
+ */
+static inline
+void fscache_update_cookie(struct fscache_cookie *cookie, const void *aux_data,
+ const loff_t *object_size)
+{
+ if (fscache_cookie_enabled(cookie))
+ __fscache_update_cookie(cookie, aux_data, object_size);
+}
+
+/**
* fscache_invalidate - Notify cache that an object needs invalidation
* @cookie: The cookie representing the cache object
* @aux_data: The updated auxiliary data for the cookie (may be NULL)