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| author | David Howells <dhowells@redhat.com> | 2021-10-21 09:55:21 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2022-01-07 13:41:53 +0000 |
| commit | fe2140e2f57fef8562e0f9b7cd447d2b08dc2f35 (patch) | |
| tree | 0ab7fb840bfbbc540a71e69848dc99dbce6f63b0 /fs/cachefiles/cache.c | |
| parent | d1065b0a6fd9397edd3094c56b777d0d8ec1290d (diff) | |
| download | lwn-fe2140e2f57fef8562e0f9b7cd447d2b08dc2f35.tar.gz lwn-fe2140e2f57fef8562e0f9b7cd447d2b08dc2f35.zip | |
cachefiles: Implement volume support
Implement support for creating the directory layout for a volume on disk
and setting up and withdrawing volume caching.
Each volume has a directory named for the volume key under the root of the
cache (prefixed with an 'I' to indicate to cachefilesd that it's an index)
and then creates a bunch of hash bucket subdirectories under that (named as
'@' plus a hex number) in which cookie files will be created.
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/163819635314.215744.13081522301564537723.stgit@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/163906936397.143852.17788457778396467161.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/163967143860.1823006.7185205806080225038.stgit@warthog.procyon.org.uk/ # v3
Link: https://lore.kernel.org/r/164021545212.640689.5064821392307582927.stgit@warthog.procyon.org.uk/ # v4
Diffstat (limited to 'fs/cachefiles/cache.c')
| -rw-r--r-- | fs/cachefiles/cache.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/fs/cachefiles/cache.c b/fs/cachefiles/cache.c index 0462e7af87fb..c4b9280ca0cd 100644 --- a/fs/cachefiles/cache.c +++ b/fs/cachefiles/cache.c @@ -263,6 +263,32 @@ begin_cull: } /* + * Withdraw volumes. + */ +static void cachefiles_withdraw_volumes(struct cachefiles_cache *cache) +{ + _enter(""); + + for (;;) { + struct cachefiles_volume *volume = NULL; + + spin_lock(&cache->object_list_lock); + if (!list_empty(&cache->volumes)) { + volume = list_first_entry(&cache->volumes, + struct cachefiles_volume, cache_link); + list_del_init(&volume->cache_link); + } + spin_unlock(&cache->object_list_lock); + if (!volume) + break; + + cachefiles_withdraw_volume(volume); + } + + _leave(""); +} + +/* * Sync a cache to backing disk. */ static void cachefiles_sync_cache(struct cachefiles_cache *cache) @@ -303,7 +329,7 @@ void cachefiles_withdraw_cache(struct cachefiles_cache *cache) // PLACEHOLDER: Withdraw objects fscache_wait_for_objects(fscache); - // PLACEHOLDER: Withdraw volume + cachefiles_withdraw_volumes(cache); cachefiles_sync_cache(cache); cache->cache = NULL; fscache_relinquish_cache(fscache); |