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| -rw-r--r-- | ChangeLog.rst | 3 | ||||
| -rw-r--r-- | include/fuse_lowlevel.h | 13 |
2 files changed, 16 insertions, 0 deletions
diff --git a/ChangeLog.rst b/ChangeLog.rst index 24b4d9c..0b6ce98 100644 --- a/ChangeLog.rst +++ b/ChangeLog.rst @@ -17,6 +17,9 @@ Unreleased Changes filesystem fully unprivileged and unable to re-acquire privilege via setuid, fscaps, etc. +* Documented under which conditions the `fuse_lowlevel_notify_*` + functions may block. + libfuse 3.2.6 (2018-08-31) ========================== diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h index 7ae8c1e..395c0d9 100644 --- a/include/fuse_lowlevel.h +++ b/include/fuse_lowlevel.h @@ -1531,6 +1531,15 @@ int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph); * this (or a newer) version, the function will return -ENOSYS and do * nothing. * + * If the filesystem has writeback caching enabled, invalidating an + * inode will first trigger a writeback of all dirty pages. The call + * will block until all writeback requests have completed and the + * inode has been invalidated. It will, however, not wait for + * completion of pending writeback requests that have been issued + * before. + * + * If there are no dirty pages, this function will never block. + * * @param se the session object * @param ino the inode number * @param off the offset in the inode where to start invalidating @@ -1554,6 +1563,8 @@ int fuse_lowlevel_notify_inval_inode(struct fuse_session *se, fuse_ino_t ino, * removexattr(), readdir() or readdirplus() request for the inode * itself. * + * When called correctly, this function will never block. + * * Added in FUSE protocol version 7.12. If the kernel does not support * this (or a newer) version, the function will return -ENOSYS and do * nothing. @@ -1582,6 +1593,8 @@ int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent, * description of fuse_lowlevel_notify_inval_entry() for more * details). * + * When called correctly, this function will never block. + * * Added in FUSE protocol version 7.18. If the kernel does not support * this (or a newer) version, the function will return -ENOSYS and do * nothing. |