1/*
  2 * Copyright (c) 2008-2010, 2013 Dave Chinner
  3 * All Rights Reserved.
  4 *
  5 * This program is free software; you can redistribute it and/or
  6 * modify it under the terms of the GNU General Public License as
  7 * published by the Free Software Foundation.
  8 *
  9 * This program is distributed in the hope that it would be useful,
 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12 * GNU General Public License for more details.
 13 *
 14 * You should have received a copy of the GNU General Public License
 15 * along with this program; if not, write the Free Software Foundation,
 16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 17 */
 18#include "xfs.h"
 19#include "xfs_fs.h"
 20#include "xfs_shared.h"
 21#include "xfs_log_format.h"
 22#include "xfs_trans_resv.h"
 23#include "xfs_bit.h"
 24#include "xfs_sb.h"
 25#include "xfs_ag.h"
 26#include "xfs_mount.h"
 27#include "xfs_trans.h"
 28#include "xfs_trans_priv.h"
 29#include "xfs_error.h"
 30#include "xfs_icreate_item.h"
 31#include "xfs_log.h"
 32
 33kmem_zone_t	*xfs_icreate_zone;		/* inode create item zone */
 34
 35static inline struct xfs_icreate_item *ICR_ITEM(struct xfs_log_item *lip)
 36{
 37	return container_of(lip, struct xfs_icreate_item, ic_item);
 38}
 39
 40/*
 41 * This returns the number of iovecs needed to log the given inode item.
 42 *
 43 * We only need one iovec for the icreate log structure.
 44 */
 45STATIC void
 46xfs_icreate_item_size(
 47	struct xfs_log_item	*lip,
 48	int			*nvecs,
 49	int			*nbytes)
 50{
 51	*nvecs += 1;
 52	*nbytes += sizeof(struct xfs_icreate_log);
 53}
 54
 55/*
 56 * This is called to fill in the vector of log iovecs for the
 57 * given inode create log item.
 58 */
 59STATIC void
 60xfs_icreate_item_format(
 61	struct xfs_log_item	*lip,
 62	struct xfs_log_vec	*lv)
 63{
 64	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
 65	struct xfs_log_iovec	*vecp = NULL;
 66
 67	xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ICREATE,
 68			&icp->ic_format,
 69			sizeof(struct xfs_icreate_log));
 70}
 71
 72
 73/* Pinning has no meaning for the create item, so just return. */
 74STATIC void
 75xfs_icreate_item_pin(
 76	struct xfs_log_item	*lip)
 77{
 78}
 79
 80
 81/* pinning has no meaning for the create item, so just return. */
 82STATIC void
 83xfs_icreate_item_unpin(
 84	struct xfs_log_item	*lip,
 85	int			remove)
 86{
 87}
 88
 89STATIC void
 90xfs_icreate_item_unlock(
 91	struct xfs_log_item	*lip)
 92{
 93	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
 94
 95	if (icp->ic_item.li_flags & XFS_LI_ABORTED)
 96		kmem_zone_free(xfs_icreate_zone, icp);
 97	return;
 98}
 99
100/*
101 * Because we have ordered buffers being tracked in the AIL for the inode
102 * creation, we don't need the create item after this. Hence we can free
103 * the log item and return -1 to tell the caller we're done with the item.
104 */
105STATIC xfs_lsn_t
106xfs_icreate_item_committed(
107	struct xfs_log_item	*lip,
108	xfs_lsn_t		lsn)
109{
110	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
111
112	kmem_zone_free(xfs_icreate_zone, icp);
113	return (xfs_lsn_t)-1;
114}
115
116/* item can never get into the AIL */
117STATIC uint
118xfs_icreate_item_push(
119	struct xfs_log_item	*lip,
120	struct list_head	*buffer_list)
121{
122	ASSERT(0);
123	return XFS_ITEM_SUCCESS;
124}
125
126/* Ordered buffers do the dependency tracking here, so this does nothing. */
127STATIC void
128xfs_icreate_item_committing(
129	struct xfs_log_item	*lip,
130	xfs_lsn_t		lsn)
131{
132}
133
134/*
135 * This is the ops vector shared by all buf log items.
136 */
137static struct xfs_item_ops xfs_icreate_item_ops = {
138	.iop_size	= xfs_icreate_item_size,
139	.iop_format	= xfs_icreate_item_format,
140	.iop_pin	= xfs_icreate_item_pin,
141	.iop_unpin	= xfs_icreate_item_unpin,
142	.iop_push	= xfs_icreate_item_push,
143	.iop_unlock	= xfs_icreate_item_unlock,
144	.iop_committed	= xfs_icreate_item_committed,
145	.iop_committing = xfs_icreate_item_committing,
146};
147
148
149/*
150 * Initialize the inode log item for a newly allocated (in-core) inode.
151 *
152 * Inode extents can only reside within an AG. Hence specify the starting
153 * block for the inode chunk by offset within an AG as well as the
154 * length of the allocated extent.
155 *
156 * This joins the item to the transaction and marks it dirty so
157 * that we don't need a separate call to do this, nor does the
158 * caller need to know anything about the icreate item.
159 */
160void
161xfs_icreate_log(
162	struct xfs_trans	*tp,
163	xfs_agnumber_t		agno,
164	xfs_agblock_t		agbno,
165	unsigned int		count,
166	unsigned int		inode_size,
167	xfs_agblock_t		length,
168	unsigned int		generation)
169{
170	struct xfs_icreate_item	*icp;
171
172	icp = kmem_zone_zalloc(xfs_icreate_zone, KM_SLEEP);
173
174	xfs_log_item_init(tp->t_mountp, &icp->ic_item, XFS_LI_ICREATE,
175			  &xfs_icreate_item_ops);
176
177	icp->ic_format.icl_type = XFS_LI_ICREATE;
178	icp->ic_format.icl_size = 1;	/* single vector */
179	icp->ic_format.icl_ag = cpu_to_be32(agno);
180	icp->ic_format.icl_agbno = cpu_to_be32(agbno);
181	icp->ic_format.icl_count = cpu_to_be32(count);
182	icp->ic_format.icl_isize = cpu_to_be32(inode_size);
183	icp->ic_format.icl_length = cpu_to_be32(length);
184	icp->ic_format.icl_gen = cpu_to_be32(generation);
185
186	xfs_trans_add_item(tp, &icp->ic_item);
187	tp->t_flags |= XFS_TRANS_DIRTY;
188	icp->ic_item.li_desc->lid_flags |= XFS_LID_DIRTY;
189}