diff options
| author | Christoph Hellwig <hch@lst.de> | 2015-10-03 15:32:37 +0200 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-10-14 07:08:43 +0200 |
| commit | 870823e629ea194e6cf8e82a9694ac62cad49512 (patch) | |
| tree | b48ab62284a125096e42d6628850c7a8e4629aa7 /include | |
| parent | Linux 4.3-rc1 (diff) | |
| download | linux-870823e629ea194e6cf8e82a9694ac62cad49512.tar.xz linux-870823e629ea194e6cf8e82a9694ac62cad49512.zip | |
configfs: add show and store methods to struct configfs_attribute
Add methods to struct configfs_attribute to directly show and store
attributes without adding boilerplate code to every user. In addition
to the methods this also adds 3 helper macros to define read/write,
read-only and write-only attributes with a single line of code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/configfs.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/configfs.h b/include/linux/configfs.h index 63a36e89d0eb..85e9956a86de 100644 --- a/include/linux/configfs.h +++ b/include/linux/configfs.h @@ -125,8 +125,35 @@ struct configfs_attribute { const char *ca_name; struct module *ca_owner; umode_t ca_mode; + ssize_t (*show)(struct config_item *, char *); + ssize_t (*store)(struct config_item *, const char *, size_t); }; +#define CONFIGFS_ATTR(_pfx, _name) \ +static struct configfs_attribute _pfx##attr_##_name = { \ + .ca_name = __stringify(_name), \ + .ca_mode = S_IRUGO | S_IWUSR, \ + .ca_owner = THIS_MODULE, \ + .show = _pfx##_name##_show, \ + .store = _pfx##_name##_store, \ +} + +#define CONFIGFS_ATTR_RO(_pfx, _name) \ +static struct configfs_attribute _pfx##attr_##_name = { \ + .ca_name = __stringify(_name), \ + .ca_mode = S_IRUGO, \ + .ca_owner = THIS_MODULE, \ + .show = _pfx##_name##_show, \ +} + +#define CONFIGFS_ATTR_WO(_pfx, _name) \ +static struct configfs_attribute _pfx##attr_##_name = { \ + .ca_name = __stringify(_name), \ + .ca_mode = S_IWUSR, \ + .ca_owner = THIS_MODULE, \ + .store = _pfx##_name##_store, \ +} + /* * Users often need to create attribute structures for their configurable * attributes, containing a configfs_attribute member and function pointers |