diff options
| author | Luis Henriques <luis@igalia.com> | 2025-02-26 09:14:51 +0000 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2025-04-15 12:56:40 +0200 |
| commit | 2396356a945bb022aff02656f59c2a45d457043f (patch) | |
| tree | aa65795d0a7b4276cab2a8b0abb2912206a4c3e1 /include/uapi/linux | |
| parent | faa794dd2e17e74cc0c8fdb6742dfb6ca3c182d0 (diff) | |
fuse: add more control over cache invalidation behaviour
Currently userspace is able to notify the kernel to invalidate the cache
for an inode. This means that, if all the inodes in a filesystem need to
be invalidated, then userspace needs to iterate through all of them and do
this kernel notification separately.
This patch adds the concept of 'epoch': each fuse connection will have the
current epoch initialized and every new dentry will have it's d_time set to
the current epoch value. A new operation will then allow userspace to
increment the epoch value. Every time a dentry is d_revalidate()'ed, it's
epoch is compared with the current connection epoch and invalidated if it's
value is different.
Signed-off-by: Luis Henriques <luis@igalia.com>
Tested-by: Laura Promberger <laura.promberger@cern.ch>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/fuse.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h index 5ec43ecbceb7..122d6586e8d4 100644 --- a/include/uapi/linux/fuse.h +++ b/include/uapi/linux/fuse.h @@ -232,6 +232,9 @@ * * 7.43 * - add FUSE_REQUEST_TIMEOUT + * + * 7.44 + * - add FUSE_NOTIFY_INC_EPOCH */ #ifndef _LINUX_FUSE_H @@ -267,7 +270,7 @@ #define FUSE_KERNEL_VERSION 7 /** Minor version number of this interface */ -#define FUSE_KERNEL_MINOR_VERSION 43 +#define FUSE_KERNEL_MINOR_VERSION 44 /** The node ID of the root inode */ #define FUSE_ROOT_ID 1 @@ -671,6 +674,7 @@ enum fuse_notify_code { FUSE_NOTIFY_RETRIEVE = 5, FUSE_NOTIFY_DELETE = 6, FUSE_NOTIFY_RESEND = 7, + FUSE_NOTIFY_INC_EPOCH = 8, FUSE_NOTIFY_CODE_MAX, }; |