From: David Chinner Subject: [PATCH] XFS ->fallocate() support Date: Mon, 30 Apr 2007 13:11:21 +1000 Message-ID: <20070430031121.GO32602149@melbourne.sgi.com> References: <20070329115126.GB7374@amitarora.in.ibm.com> <20070329101010.7a2b8783.akpm@linux-foundation.org> <20070330071417.GI355@devserv.devel.redhat.com> <20070417125514.GA7574@amitarora.in.ibm.com> <20070418130600.GW5967@schatzie.adilger.int> <20070420135146.GA21352@amitarora.in.ibm.com> <20070420145918.GY355@devserv.devel.redhat.com> <20070424121632.GA10136@amitarora.in.ibm.com> <20070426175056.GA25321@amitarora.in.ibm.com> <20070430004702.GM32602149@melbourne.sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "Amit K. Arora" , torvalds@osdl.org, akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, xfs@oss.sgi.com, suparna@in.ibm.com, cmm@us.ibm.com To: David Chinner Return-path: Content-Disposition: inline In-Reply-To: <20070430004702.GM32602149@melbourne.sgi.com> Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Add XFS support for ->fallocate() vector. Signed-Off-By: Dave Chinner --- fs/xfs/linux-2.6/xfs_iops.c | 48 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) Index: 2.6.x-xfs-new/fs/xfs/linux-2.6/xfs_iops.c =================================================================== --- 2.6.x-xfs-new.orig/fs/xfs/linux-2.6/xfs_iops.c 2007-02-07 13:24:32.000000000 +1100 +++ 2.6.x-xfs-new/fs/xfs/linux-2.6/xfs_iops.c 2007-04-30 11:02:16.225095992 +1000 @@ -812,6 +812,53 @@ xfs_vn_removexattr( return namesp->attr_remove(vp, attr, xflags); } +STATIC long +xfs_vn_fallocate( + struct inode *inode, + int mode, + loff_t offset, + loff_t len) +{ + long error = -EOPNOTSUPP; + bhv_vnode_t *vp = vn_from_inode(inode); + bhv_desc_t *bdp; + int do_setattr = 0; + xfs_flock64_t bf; + + bf.l_whence = 0; + bf.l_start = offset; + bf.l_len = len; + + bdp = bhv_lookup_range(VN_BHV_HEAD(vp), VNODE_POSITION_XFS, + VNODE_POSITION_XFS); + + switch (mode) { + case FA_ALLOCATE: /* changes file size */ + error = xfs_change_file_space(bdp, XFS_IOC_RESVSP, + &bf, 0, NULL, 0); + if (offset + len > i_size_read(inode)) + do_setattr = offset + len; + break; + case FA_DEALLOCATE: + /* XXX: changes file size? this just punches a hole */ + error = xfs_change_file_space(bdp, XFS_IOC_UNRESVSP, + &bf, 0, NULL, 0); + break; + default: + break; + } + + /* Change file size if needed */ + if (!error && do_setattr) { + bhv_vattr_t va; + + va.va_mask = XFS_AT_SIZE; + va.va_size = do_setattr; + error = bhv_vop_setattr(vp, &va, 0, NULL); + } + + return error; +} struct inode_operations xfs_inode_operations = { .permission = xfs_vn_permission, @@ -822,6 +869,7 @@ struct inode_operations xfs_inode_operat .getxattr = xfs_vn_getxattr, .listxattr = xfs_vn_listxattr, .removexattr = xfs_vn_removexattr, + .fallocate = xfs_vn_fallocate, }; struct inode_operations xfs_dir_inode_operations = {