Define the cachefiles_cache struct that's going to carry the cache-level parameters and state of a cache. Define the beginning of the cachefiles_object struct that's going to carry the state for a data storage object. For the moment this is just a debugging ID for logging purposes. Signed-off-by: David Howells <dhowells@xxxxxxxxxx> cc: linux-cachefs@xxxxxxxxxx Link: https://lore.kernel.org/r/163819623690.215744.2824739137193655547.stgit@xxxxxxxxxxxxxxxxxxxxxx/ # v1 Link: https://lore.kernel.org/r/163906924292.143852.15881439716653984905.stgit@xxxxxxxxxxxxxxxxxxxxxx/ # v2 Link: https://lore.kernel.org/r/163967131405.1823006.4480555941533935597.stgit@xxxxxxxxxxxxxxxxxxxxxx/ # v3 --- fs/cachefiles/internal.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h index 26e0e23d7702..cff4b2a5f928 100644 --- a/fs/cachefiles/internal.h +++ b/fs/cachefiles/internal.h @@ -16,6 +16,52 @@ #include <linux/cred.h> #include <linux/security.h> +struct cachefiles_cache; +struct cachefiles_object; + +/* + * Data file records. + */ +struct cachefiles_object { + int debug_id; /* debugging ID */ +}; + +/* + * Cache files cache definition + */ +struct cachefiles_cache { + struct vfsmount *mnt; /* mountpoint holding the cache */ + struct file *cachefilesd; /* manager daemon handle */ + const struct cred *cache_cred; /* security override for accessing cache */ + struct mutex daemon_mutex; /* command serialisation mutex */ + wait_queue_head_t daemon_pollwq; /* poll waitqueue for daemon */ + atomic_t gravecounter; /* graveyard uniquifier */ + atomic_t f_released; /* number of objects released lately */ + atomic_long_t b_released; /* number of blocks released lately */ + unsigned frun_percent; /* when to stop culling (% files) */ + unsigned fcull_percent; /* when to start culling (% files) */ + unsigned fstop_percent; /* when to stop allocating (% files) */ + unsigned brun_percent; /* when to stop culling (% blocks) */ + unsigned bcull_percent; /* when to start culling (% blocks) */ + unsigned bstop_percent; /* when to stop allocating (% blocks) */ + unsigned bsize; /* cache's block size */ + unsigned bshift; /* min(ilog2(PAGE_SIZE / bsize), 0) */ + uint64_t frun; /* when to stop culling */ + uint64_t fcull; /* when to start culling */ + uint64_t fstop; /* when to stop allocating */ + sector_t brun; /* when to stop culling */ + sector_t bcull; /* when to start culling */ + sector_t bstop; /* when to stop allocating */ + unsigned long flags; +#define CACHEFILES_READY 0 /* T if cache prepared */ +#define CACHEFILES_DEAD 1 /* T if cache dead */ +#define CACHEFILES_CULLING 2 /* T if cull engaged */ +#define CACHEFILES_STATE_CHANGED 3 /* T if state changed (poll trigger) */ + char *rootdirname; /* name of cache root directory */ + char *secctx; /* LSM security context */ + char *tag; /* cache binding tag */ +}; + /* * Debug tracing.
