autofs: update ioctl documentation regarding struct autofs_dev_ioctl
This is the same asbf72eda5
except that it's a different file. Sync documentation with changes made by730c9eec
in 2009. Link: http://lkml.kernel.org/r/148577165630.9801.6081791213151121657.stgit@pluto.themaw.net Signed-off-by: Tomohiro Kusumi <tkusumi@tuxera.com> Signed-off-by: Ian Kent <raven@themaw.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
c5dd2ea064
commit
8848808094
|
@ -179,6 +179,7 @@ struct autofs_dev_ioctl {
|
||||||
* including this struct */
|
* including this struct */
|
||||||
__s32 ioctlfd; /* automount command fd */
|
__s32 ioctlfd; /* automount command fd */
|
||||||
|
|
||||||
|
/* Command parameters */
|
||||||
union {
|
union {
|
||||||
struct args_protover protover;
|
struct args_protover protover;
|
||||||
struct args_protosubver protosubver;
|
struct args_protosubver protosubver;
|
||||||
|
|
|
@ -425,8 +425,20 @@ Each ioctl is passed a pointer to an `autofs_dev_ioctl` structure:
|
||||||
* including this struct */
|
* including this struct */
|
||||||
__s32 ioctlfd; /* automount command fd */
|
__s32 ioctlfd; /* automount command fd */
|
||||||
|
|
||||||
__u32 arg1; /* Command parameters */
|
/* Command parameters */
|
||||||
__u32 arg2;
|
union {
|
||||||
|
struct args_protover protover;
|
||||||
|
struct args_protosubver protosubver;
|
||||||
|
struct args_openmount openmount;
|
||||||
|
struct args_ready ready;
|
||||||
|
struct args_fail fail;
|
||||||
|
struct args_setpipefd setpipefd;
|
||||||
|
struct args_timeout timeout;
|
||||||
|
struct args_requester requester;
|
||||||
|
struct args_expire expire;
|
||||||
|
struct args_askumount askumount;
|
||||||
|
struct args_ismountpoint ismountpoint;
|
||||||
|
};
|
||||||
|
|
||||||
char path[0];
|
char path[0];
|
||||||
};
|
};
|
||||||
|
@ -446,24 +458,22 @@ Commands are:
|
||||||
set version numbers.
|
set version numbers.
|
||||||
- **AUTOFS_DEV_IOCTL_OPENMOUNT_CMD**: return an open file descriptor
|
- **AUTOFS_DEV_IOCTL_OPENMOUNT_CMD**: return an open file descriptor
|
||||||
on the root of an autofs filesystem. The filesystem is identified
|
on the root of an autofs filesystem. The filesystem is identified
|
||||||
by name and device number, which is stored in `arg1`. Device
|
by name and device number, which is stored in `openmount.devid`.
|
||||||
numbers for existing filesystems can be found in
|
Device numbers for existing filesystems can be found in
|
||||||
`/proc/self/mountinfo`.
|
`/proc/self/mountinfo`.
|
||||||
- **AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD**: same as `close(ioctlfd)`.
|
- **AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD**: same as `close(ioctlfd)`.
|
||||||
- **AUTOFS_DEV_IOCTL_SETPIPEFD_CMD**: if the filesystem is in
|
- **AUTOFS_DEV_IOCTL_SETPIPEFD_CMD**: if the filesystem is in
|
||||||
catatonic mode, this can provide the write end of a new pipe
|
catatonic mode, this can provide the write end of a new pipe
|
||||||
in `arg1` to re-establish communication with a daemon. The
|
in `setpipefd.pipefd` to re-establish communication with a daemon.
|
||||||
process group of the calling process is used to identify the
|
The process group of the calling process is used to identify the
|
||||||
daemon.
|
daemon.
|
||||||
- **AUTOFS_DEV_IOCTL_REQUESTER_CMD**: `path` should be a
|
- **AUTOFS_DEV_IOCTL_REQUESTER_CMD**: `path` should be a
|
||||||
name within the filesystem that has been auto-mounted on.
|
name within the filesystem that has been auto-mounted on.
|
||||||
On successful return, `arg1` and `arg2` will be the UID and GID
|
On successful return, `requester.uid` and `requester.gid` will be
|
||||||
of the process which triggered that mount.
|
the UID and GID of the process which triggered that mount.
|
||||||
|
|
||||||
- **AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD**: Check if path is a
|
- **AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD**: Check if path is a
|
||||||
mountpoint of a particular type - see separate documentation for
|
mountpoint of a particular type - see separate documentation for
|
||||||
details.
|
details.
|
||||||
|
|
||||||
- **AUTOFS_DEV_IOCTL_PROTOVER_CMD**:
|
- **AUTOFS_DEV_IOCTL_PROTOVER_CMD**:
|
||||||
- **AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD**:
|
- **AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD**:
|
||||||
- **AUTOFS_DEV_IOCTL_READY_CMD**:
|
- **AUTOFS_DEV_IOCTL_READY_CMD**:
|
||||||
|
@ -473,7 +483,7 @@ Commands are:
|
||||||
- **AUTOFS_DEV_IOCTL_EXPIRE_CMD**:
|
- **AUTOFS_DEV_IOCTL_EXPIRE_CMD**:
|
||||||
- **AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD**: These all have the same
|
- **AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD**: These all have the same
|
||||||
function as the similarly named **AUTOFS_IOC** ioctls, except
|
function as the similarly named **AUTOFS_IOC** ioctls, except
|
||||||
that **FAIL** can be given an explicit error number in `arg1`
|
that **FAIL** can be given an explicit error number in `fail.status`
|
||||||
instead of assuming `ENOENT`, and this **EXPIRE** command
|
instead of assuming `ENOENT`, and this **EXPIRE** command
|
||||||
corresponds to **AUTOFS_IOC_EXPIRE_MULTI**.
|
corresponds to **AUTOFS_IOC_EXPIRE_MULTI**.
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue