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_format.h"
 22#include "xfs_log_format.h"
 23#include "xfs_trans_resv.h"
 24#include "xfs_bit.h"
 25#include "xfs_mount.h"
 26#include "xfs_trans.h"
 27#include "xfs_trans_priv.h"
 28#include "xfs_error.h"
 29#include "xfs_icreate_item.h"
 30#include "xfs_log.h"
 31
 32kmem_zone_t	*xfs_icreate_zone;		/* inode create item zone */
 33
 34static inline struct xfs_icreate_item *ICR_ITEM(struct xfs_log_item *lip)
 35{
 36	return container_of(lip, struct xfs_icreate_item, ic_item);
 37}
 38
 39/*
 40 * This returns the number of iovecs needed to log the given inode item.
 41 *
 42 * We only need one iovec for the icreate log structure.
 43 */
 44STATIC void
 45xfs_icreate_item_size(
 46	struct xfs_log_item	*lip,
 47	int			*nvecs,
 48	int			*nbytes)
 49{
 50	*nvecs += 1;
 51	*nbytes += sizeof(struct xfs_icreate_log);
 52}
 53
 54/*
 55 * This is called to fill in the vector of log iovecs for the
 56 * given inode create log item.
 57 */
 58STATIC void
 59xfs_icreate_item_format(
 60	struct xfs_log_item	*lip,
 61	struct xfs_log_vec	*lv)
 62{
 63	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
 64	struct xfs_log_iovec	*vecp = NULL;
 65
 66	xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ICREATE,
 67			&icp->ic_format,
 68			sizeof(struct xfs_icreate_log));
 69}
 70
 71
 72/* Pinning has no meaning for the create item, so just return. */
 73STATIC void
 74xfs_icreate_item_pin(
 75	struct xfs_log_item	*lip)
 76{
 77}
 78
 79
 80/* pinning has no meaning for the create item, so just return. */
 81STATIC void
 82xfs_icreate_item_unpin(
 83	struct xfs_log_item	*lip,
 84	int			remove)
 85{
 86}
 87
 88STATIC void
 89xfs_icreate_item_unlock(
 90	struct xfs_log_item	*lip)
 91{
 92	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
 93
 94	if (icp->ic_item.li_flags & XFS_LI_ABORTED)
 95		kmem_zone_free(xfs_icreate_zone, icp);
 96	return;
 97}
 98
 99/*
100 * Because we have ordered buffers being tracked in the AIL for the inode
101 * creation, we don't need the create item after this. Hence we can free
102 * the log item and return -1 to tell the caller we're done with the item.
103 */
104STATIC xfs_lsn_t
105xfs_icreate_item_committed(
106	struct xfs_log_item	*lip,
107	xfs_lsn_t		lsn)
108{
109	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
110
111	kmem_zone_free(xfs_icreate_zone, icp);
112	return (xfs_lsn_t)-1;
113}
114
115/* item can never get into the AIL */
116STATIC uint
117xfs_icreate_item_push(
118	struct xfs_log_item	*lip,
119	struct list_head	*buffer_list)
120{
121	ASSERT(0);
122	return XFS_ITEM_SUCCESS;
123}
124
125/* Ordered buffers do the dependency tracking here, so this does nothing. */
126STATIC void
127xfs_icreate_item_committing(
128	struct xfs_log_item	*lip,
129	xfs_lsn_t		lsn)
130{
131}
132
133/*
134 * This is the ops vector shared by all buf log items.
135 */
136static const struct xfs_item_ops xfs_icreate_item_ops = {
137	.iop_size	= xfs_icreate_item_size,
138	.iop_format	= xfs_icreate_item_format,
139	.iop_pin	= xfs_icreate_item_pin,
140	.iop_unpin	= xfs_icreate_item_unpin,
141	.iop_push	= xfs_icreate_item_push,
142	.iop_unlock	= xfs_icreate_item_unlock,
143	.iop_committed	= xfs_icreate_item_committed,
144	.iop_committing = xfs_icreate_item_committing,
145};
146
147
148/*
149 * Initialize the inode log item for a newly allocated (in-core) inode.
150 *
151 * Inode extents can only reside within an AG. Hence specify the starting
152 * block for the inode chunk by offset within an AG as well as the
153 * length of the allocated extent.
154 *
155 * This joins the item to the transaction and marks it dirty so
156 * that we don't need a separate call to do this, nor does the
157 * caller need to know anything about the icreate item.
158 */
159void
160xfs_icreate_log(
161	struct xfs_trans	*tp,
162	xfs_agnumber_t		agno,
163	xfs_agblock_t		agbno,
164	unsigned int		count,
165	unsigned int		inode_size,
166	xfs_agblock_t		length,
167	unsigned int		generation)
168{
169	struct xfs_icreate_item	*icp;
170
171	icp = kmem_zone_zalloc(xfs_icreate_zone, KM_SLEEP);
172
173	xfs_log_item_init(tp->t_mountp, &icp->ic_item, XFS_LI_ICREATE,
174			  &xfs_icreate_item_ops);
175
176	icp->ic_format.icl_type = XFS_LI_ICREATE;
177	icp->ic_format.icl_size = 1;	/* single vector */
178	icp->ic_format.icl_ag = cpu_to_be32(agno);
179	icp->ic_format.icl_agbno = cpu_to_be32(agbno);
180	icp->ic_format.icl_count = cpu_to_be32(count);
181	icp->ic_format.icl_isize = cpu_to_be32(inode_size);
182	icp->ic_format.icl_length = cpu_to_be32(length);
183	icp->ic_format.icl_gen = cpu_to_be32(generation);
184
185	xfs_trans_add_item(tp, &icp->ic_item);
186	tp->t_flags |= XFS_TRANS_DIRTY;
187	icp->ic_item.li_desc->lid_flags |= XFS_LID_DIRTY;
188}