NAME
libnvmf_registry_update - Update an attribute in a controller's registry entry
SYNOPSIS
int libnvmf_registry_update (struct libnvme_global_ctx *ctx , const char *device , const char *attr , const char *value );
ARGUMENTS
- ctx
-
libnvme global context; must not be NULL
- device
-
Kernel device name (e.g. "nvme3")
- attr
-
Attribute name to update (e.g. "owner")
- value
-
New attribute value, or NULL to remove the attribute file
DESCRIPTION
Writes the attribute value to the controller's registry entry using an atomic tmp-file rename. If the entry does not exist, it is created atomically the same way as on connect, including the best-effort seqnum stamp for the udev cleanup rule. If value is NULL, the attribute file is removed instead; a missing entry is left alone in this case.
RETURN
0 on success, negative errno from underlying system calls otherwise.