diff options
author | David Howells <dhowells@redhat.com> | 2021-08-20 19:08:30 +0300 |
---|---|---|
committer | David Howells <dhowells@redhat.com> | 2023-12-24 18:08:51 +0300 |
commit | c1ec4d7c2e13471558cfea302b7583856284f94c (patch) | |
tree | 6899f7f54f3871ebd5b906a56b9828b0a73492cd /fs/netfs/misc.c | |
parent | a34847d4b73c3a98b565b1d1cc6e1b70c661e18b (diff) | |
download | linux-c1ec4d7c2e13471558cfea302b7583856284f94c.tar.xz |
netfs: Provide invalidate_folio and release_folio calls
Provide default invalidate_folio and release_folio calls. These will need
to interact with invalidation correctly at some point. They will be needed
if netfslib is to make use of folio->private for its own purposes.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Diffstat (limited to 'fs/netfs/misc.c')
-rw-r--r-- | fs/netfs/misc.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/fs/netfs/misc.c b/fs/netfs/misc.c index 68baf55c47a4..45bb19ec9a63 100644 --- a/fs/netfs/misc.c +++ b/fs/netfs/misc.c @@ -84,3 +84,45 @@ void netfs_clear_inode_writeback(struct inode *inode, const void *aux) } } EXPORT_SYMBOL(netfs_clear_inode_writeback); + +/** + * netfs_invalidate_folio - Invalidate or partially invalidate a folio + * @folio: Folio proposed for release + * @offset: Offset of the invalidated region + * @length: Length of the invalidated region + * + * Invalidate part or all of a folio for a network filesystem. The folio will + * be removed afterwards if the invalidated region covers the entire folio. + */ +void netfs_invalidate_folio(struct folio *folio, size_t offset, size_t length) +{ + _enter("{%lx},%zx,%zx", folio_index(folio), offset, length); + + folio_wait_fscache(folio); +} +EXPORT_SYMBOL(netfs_invalidate_folio); + +/** + * netfs_release_folio - Try to release a folio + * @folio: Folio proposed for release + * @gfp: Flags qualifying the release + * + * Request release of a folio and clean up its private state if it's not busy. + * Returns true if the folio can now be released, false if not + */ +bool netfs_release_folio(struct folio *folio, gfp_t gfp) +{ + struct netfs_inode *ctx = netfs_inode(folio_inode(folio)); + + if (folio_test_private(folio)) + return false; + if (folio_test_fscache(folio)) { + if (current_is_kswapd() || !(gfp & __GFP_FS)) + return false; + folio_wait_fscache(folio); + } + + fscache_note_page_release(netfs_i_cookie(ctx)); + return true; +} +EXPORT_SYMBOL(netfs_release_folio); |