Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762328AbZFPUjw (ORCPT ); Tue, 16 Jun 2009 16:39:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752885AbZFPUjl (ORCPT ); Tue, 16 Jun 2009 16:39:41 -0400 Received: from mx2.redhat.com ([66.187.237.31]:59551 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751378AbZFPUjk (ORCPT ); Tue, 16 Jun 2009 16:39:40 -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 08/17] AFS: Implement the PGetFileCell 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 21:39:27 +0100 Message-ID: <20090616203926.4526.37772.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: 3033 Lines: 107 From: Jacob Thebault-Spieker Implement the PGetFileCell pioctl for AFS. This will get the name of the cell to which a file belongs and return to userspace. This can be tested with the OpenAFS userspace tools by doing: fs whichcell /afs on a mounted AFS filesystem, which should return something like: File /afs lives in cell 'cambridge.redhat.com' Signed-off-by: Jacob Thebault-Spieker Signed-off-by: David Howells --- fs/afs/pioctl.c | 31 +++++++++++++++++++++++++++++++ include/linux/afscall.h | 1 + include/linux/venus.h | 1 + 3 files changed, 33 insertions(+), 0 deletions(-) diff --git a/fs/afs/pioctl.c b/fs/afs/pioctl.c index 2e4f741..3d95a0d 100644 --- a/fs/afs/pioctl.c +++ b/fs/afs/pioctl.c @@ -11,6 +11,7 @@ #include #include #include +#include #include "internal.h" /* @@ -39,6 +40,32 @@ static long afs_PGetFID(struct dentry *dentry, struct vice_ioctl *arg, } /* + * Get the cell that the file belongs to + */ +long afs_PGetFileCell(struct dentry *dentry, struct vice_ioctl *arg, + struct key *key) +{ + struct afs_vnode *vnode; + size_t name_len; + + _enter(""); + + vnode = AFS_FS_I(dentry->d_inode); + name_len = strlen(vnode->volume->vlocation->cell->name); + + if (arg->out_size < name_len + 1) { + _leave(" = -EINVAL [%d < %zu]", arg->out_size, name_len + 1); + return -EINVAL; + } + + memcpy(arg->out, &vnode->volume->vlocation->cell->name, name_len + 1); + arg->out_size = name_len + 1; + + _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) @@ -64,6 +91,10 @@ long afs_pioctl(struct dentry *dentry, int cmd, struct vice_ioctl *arg) ret = afs_PGetFID(dentry, arg, key); break; + case VIOC_COMMAND(PGetFileCell): + ret = afs_PGetFileCell(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 cb006a2..0976469 100644 --- a/include/linux/afscall.h +++ b/include/linux/afscall.h @@ -15,5 +15,6 @@ /* pioctl commands */ #define PGetFID 22 /* get file ID */ +#define PGetFileCell 30 /* get the cell a file inhabits */ #endif /* _LINUX_AFSCALL_H */ diff --git a/include/linux/venus.h b/include/linux/venus.h index ea896e4..9cc115c 100644 --- a/include/linux/venus.h +++ b/include/linux/venus.h @@ -18,5 +18,6 @@ * pioctl commands (not usable as ioctls) */ #define VIOCGETFID _VICEIOCTL(PGetFID) +#define VIOC_FILE_CELL_NAME _VICEIOCTL(PGetFileCell) #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/