diff options
Diffstat (limited to 'include/fuse_common.h')
| -rw-r--r-- | include/fuse_common.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/fuse_common.h b/include/fuse_common.h index e9d8745..dbba05a 100644 --- a/include/fuse_common.h +++ b/include/fuse_common.h @@ -409,6 +409,22 @@ struct fuse_loop_config_v1 { #define FUSE_CAP_EXPLICIT_INVAL_DATA (1 << 25) /** + * Indicates support that dentries can be expired or invalidated. + * + * Expiring dentries, instead of invalidating them, makes a difference for + * overmounted dentries, where plain invalidation would detach all submounts + * before dropping the dentry from the cache. If only expiry is set on the + * dentry, then any overmounts are left alone and until ->d_revalidate() + * is called. + * + * Note: ->d_revalidate() is not called for the case of following a submount, + * so invalidation will only be triggered for the non-overmounted case. + * The dentry could also be mounted in a different mount instance, in which case + * any submounts will still be detached. +*/ +#define FUSE_CAP_EXPIRE_ONLY (1 << 26) + +/** * Ioctl flags * * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine |