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| author | Nikolaus Rath <Nikolaus@rath.org> | 2018-09-20 08:56:16 +0100 |
|---|---|---|
| committer | Nikolaus Rath <Nikolaus@rath.org> | 2018-09-20 09:07:45 +0100 |
| commit | 40e452e40503d21f438bfdaae2a81980c717e057 (patch) | |
| tree | 5f729d2f69e6d85c9f443b707517e6447937d9c6 /include | |
| parent | 7b0075c06f171cdac7a3d565463c0e5938dff04d (diff) | |
| download | libfuse-40e452e40503d21f438bfdaae2a81980c717e057.tar.gz | |
Clarify what qualifies as a "related operation" for notify_inval_entry.
Diffstat (limited to 'include')
| -rw-r--r-- | include/fuse_lowlevel.h | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h index 6528e87..7ae8c1e 100644 --- a/include/fuse_lowlevel.h +++ b/include/fuse_lowlevel.h @@ -1545,9 +1545,14 @@ int fuse_lowlevel_notify_inval_inode(struct fuse_session *se, fuse_ino_t ino, * Notify to invalidate parent attributes and the dentry matching * parent/name * - * To avoid a deadlock don't call this function from a filesystem - * operation and don't call it with a lock held that can also be held - * by a filesystem operation. + * To avoid a deadlock this function must not be called while + * executing a related filesytem operation or while holding a lock + * that could be needed to execute such an operation. As of kernel + * 4.18, a "related operation" is a lookup(), symlink(), mknod(), + * mkdir(), unlink(), rename(), link() or create() request for the + * parent, and a setattr(), unlink(), rmdir(), rename(), setxattr(), + * removexattr(), readdir() or readdirplus() request for the inode + * itself. * * 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 @@ -1571,9 +1576,11 @@ int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent, * watches registered for the dentry, then the watchers are informed * that the dentry has been deleted. * - * To avoid a deadlock don't call this function from a filesystem - * operation and don't call it with a lock held that can also be held - * by a filesystem operation. + * To avoid a deadlock this function must not be called while + * executing a related filesytem operation or while holding a lock + * that could be needed to execute such an operation (see the + * description of fuse_lowlevel_notify_inval_entry() for more + * details). * * 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 |