diff options
| author | David Howells <dhowells@redhat.com> | 2021-11-17 16:22:21 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2022-01-07 13:42:08 +0000 |
| commit | df98e87f2091774c377ddfaedfe64bd90ed4bdca (patch) | |
| tree | 626bfd7ea0af245966ca301cc7b1c1f28c38f9de /fs/cachefiles/internal.h | |
| parent | 13871bad1ef7f41947c816a9e342aa9fa8643c5e (diff) | |
cachefiles: Implement object lifecycle funcs
Implement allocate, get, see and put functions for the cachefiles_object
struct. The members of the struct we're going to need are also added.
Additionally, implement a lifecycle tracepoint.
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/163819639457.215744.4600093239395728232.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/163906939569.143852.3594314410666551982.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/163967148857.1823006.6332962598220464364.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/164021547762.640689.8422781599594931000.stgit@warthog.procyon.org.uk/ # v4
Diffstat (limited to 'fs/cachefiles/internal.h')
| -rw-r--r-- | fs/cachefiles/internal.h | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h index ab0e9307be7b..8763ee4a0df2 100644 --- a/fs/cachefiles/internal.h +++ b/fs/cachefiles/internal.h @@ -19,6 +19,16 @@ struct cachefiles_cache; struct cachefiles_object; +enum cachefiles_content { + /* These values are saved on disk */ + CACHEFILES_CONTENT_NO_DATA = 0, /* No content stored */ + CACHEFILES_CONTENT_SINGLE = 1, /* Content is monolithic, all is present */ + CACHEFILES_CONTENT_ALL = 2, /* Content is all present, no map */ + CACHEFILES_CONTENT_BACKFS_MAP = 3, /* Content is piecemeal, mapped through backing fs */ + CACHEFILES_CONTENT_DIRTY = 4, /* Content is dirty (only seen on disk) */ + nr__cachefiles_content +}; + /* * Cached volume representation. */ @@ -31,10 +41,20 @@ struct cachefiles_volume { }; /* - * Data file records. + * Backing file state. */ struct cachefiles_object { - int debug_id; /* debugging ID */ + struct fscache_cookie *cookie; /* Netfs data storage object cookie */ + struct cachefiles_volume *volume; /* Cache volume that holds this object */ + struct list_head cache_link; /* Link in cache->*_list */ + struct file *file; /* The file representing this object */ + char *d_name; /* Backing file name */ + int debug_id; + spinlock_t lock; + refcount_t ref; + u8 d_name_len; /* Length of filename */ + enum cachefiles_content content_info:8; /* Info about content presence */ + unsigned long flags; }; /* @@ -146,6 +166,17 @@ static inline int cachefiles_inject_remove_error(void) * interface.c */ extern const struct fscache_cache_ops cachefiles_cache_ops; +extern void cachefiles_see_object(struct cachefiles_object *object, + enum cachefiles_obj_ref_trace why); +extern struct cachefiles_object *cachefiles_grab_object(struct cachefiles_object *object, + enum cachefiles_obj_ref_trace why); +extern void cachefiles_put_object(struct cachefiles_object *object, + enum cachefiles_obj_ref_trace why); + +/* + * main.c + */ +extern struct kmem_cache *cachefiles_object_jar; /* * namei.c |