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 32 kmem_zone_t *xfs_icreate_zone; /* inode create item zone */ 33 34 static 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 */ 44 STATIC void 45 xfs_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 */ 58 STATIC void 59 xfs_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. */ 73 STATIC void 74 xfs_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. */ 81 STATIC void 82 xfs_icreate_item_unpin( 83 struct xfs_log_item *lip, 84 int remove) 85 { 86 } 87 88 STATIC void 89 xfs_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 */ 104 STATIC xfs_lsn_t 105 xfs_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 */ 116 STATIC uint 117 xfs_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. */ 126 STATIC void 127 xfs_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 */ 136 static 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 */ 159 void 160 xfs_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 } 189