Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763105AbZFPUnq (ORCPT ); Tue, 16 Jun 2009 16:43:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763117AbZFPUkc (ORCPT ); Tue, 16 Jun 2009 16:40:32 -0400 Received: from mx2.redhat.com ([66.187.237.31]:59627 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763020AbZFPUk3 (ORCPT ); Tue, 16 Jun 2009 16:40:29 -0400 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells Subject: [PATCH 07/17] AFS: Implement the PGetFid pioctl To: torvalds@osdl.org, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, linux-afs@lists.infradead.org, linux-fsdevel@vger.kernel.org, Jacob Thebault-Spieker , David Howells Date: Tue, 16 Jun 2009 21:39:21 +0100 Message-ID: <20090616203921.4526.8438.stgit@warthog.procyon.org.uk> In-Reply-To: <20090616203845.4526.60013.stgit@warthog.procyon.org.uk> References: <20090616203845.4526.60013.stgit@warthog.procyon.org.uk> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2782 Lines: 103 From: Jacob Thebault-Spieker Implement the PGetFID pioctl for AFS. This will get the FID of a specified file and return it to userspace. This can be tested with the OpenAFS userspace tools by doing: fs getfid /afs on a mounted AFS filesystem, which should return something like: File /afs (1.1.0) contained in volume 1 Signed-off-by: Jacob Thebault-Spieker Signed-off-by: David Howells --- fs/afs/pioctl.c | 30 ++++++++++++++++++++++++++++++ include/linux/afscall.h | 3 +++ include/linux/venus.h | 1 + 3 files changed, 34 insertions(+), 0 deletions(-) diff --git a/fs/afs/pioctl.c b/fs/afs/pioctl.c index 6cac006..2e4f741 100644 --- a/fs/afs/pioctl.c +++ b/fs/afs/pioctl.c @@ -10,9 +10,35 @@ #include #include #include +#include #include "internal.h" /* + * Get the AFS file identifier of a file + */ +static long afs_PGetFID(struct dentry *dentry, struct vice_ioctl *arg, + struct key *key) +{ + struct afs_vnode *vnode; + + _enter(""); + + vnode = AFS_FS_I(dentry->d_inode); + + if (arg->out_size < sizeof(vnode->fid)) { + _leave(" = -EINVAL [%d < %zu]", + arg->out_size, sizeof(vnode->fid)); + return -EINVAL; + } + + memcpy(arg->out, &vnode->fid, sizeof(vnode->fid)); + arg->out_size = sizeof(vnode->fid); + + _leave(" = 0 [%d]", arg->out_size); + return 0; +} + +/* * The AFS path-based I/O control operation */ long afs_pioctl(struct dentry *dentry, int cmd, struct vice_ioctl *arg) @@ -34,6 +60,10 @@ long afs_pioctl(struct dentry *dentry, int cmd, struct vice_ioctl *arg) #define VIOC_COMMAND(nr) (_VICEIOCTL(nr) & ~IOCSIZE_MASK) switch (cmd & ~IOCSIZE_MASK) { + case VIOC_COMMAND(PGetFID): + ret = afs_PGetFID(dentry, arg, key); + break; + default: _debug("fallback to pathless: %x", cmd); ret = afs_pathless_pioctl(cmd, arg); diff --git a/include/linux/afscall.h b/include/linux/afscall.h index 40cbfa5..cb006a2 100644 --- a/include/linux/afscall.h +++ b/include/linux/afscall.h @@ -13,4 +13,7 @@ #define AFSCALL_PIOCTL 0x14 +/* pioctl commands */ +#define PGetFID 22 /* get file ID */ + #endif /* _LINUX_AFSCALL_H */ diff --git a/include/linux/venus.h b/include/linux/venus.h index 19fe13e..ea896e4 100644 --- a/include/linux/venus.h +++ b/include/linux/venus.h @@ -17,5 +17,6 @@ /* * pioctl commands (not usable as ioctls) */ +#define VIOCGETFID _VICEIOCTL(PGetFID) #endif /* _LINUX_VENUS_H */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/