Add a check that the backing filesystem supports the creation of tmpfiles[1].
Suggested-by: Jeff Layton <[email protected]> Signed-off-by: David Howells <[email protected]> Reviewed-by: Jeff Layton <[email protected]> cc: [email protected] Link: https://lore.kernel.org/r/[email protected]/ [1] --- fs/cachefiles/cache.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/cachefiles/cache.c b/fs/cachefiles/cache.c index 2b2879c5d1d2..7077f72e6f47 100644 --- a/fs/cachefiles/cache.c +++ b/fs/cachefiles/cache.c @@ -51,6 +51,7 @@ int cachefiles_add_cache(struct cachefiles_cache *cache) /* Check features of the backing filesystem: * - Directories must support looking up and directory creation + * - We create tmpfiles to handle invalidation * - We use xattrs to store metadata * - We need to be able to query the amount of space available * - We want to be able to sync the filesystem when stopping the cache @@ -60,6 +61,7 @@ int cachefiles_add_cache(struct cachefiles_cache *cache) if (d_is_negative(root) || !d_backing_inode(root)->i_op->lookup || !d_backing_inode(root)->i_op->mkdir || + !d_backing_inode(root)->i_op->tmpfile || !(d_backing_inode(root)->i_opflags & IOP_XATTR) || !root->d_sb->s_op->statfs || !root->d_sb->s_op->sync_fs || -- Linux-cachefs mailing list [email protected] https://listman.redhat.com/mailman/listinfo/linux-cachefs
