fs/xfs/xfs_icreate_item.c

   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_types.h"
  21 #include "xfs_bit.h"
  22 #include "xfs_log.h"
  23 #include "xfs_inum.h"
  24 #include "xfs_trans.h"
  25 #include "xfs_buf_item.h"
  26 #include "xfs_sb.h"
  27 #include "xfs_ag.h"
  28 #include "xfs_dir2.h"
  29 #include "xfs_mount.h"
  30 #include "xfs_trans_priv.h"
  31 #include "xfs_bmap_btree.h"
  32 #include "xfs_alloc_btree.h"
  33 #include "xfs_ialloc_btree.h"
  34 #include "xfs_attr_sf.h"
  35 #include "xfs_dinode.h"
  36 #include "xfs_inode.h"
  37 #include "xfs_inode_item.h"
  38 #include "xfs_btree.h"
  39 #include "xfs_ialloc.h"
  40 #include "xfs_error.h"
  41 #include "xfs_icreate_item.h"
  42
  43 kmem_zone_t     *xfs_icreate_zone;              /* inode create item zone */
  44
  45 static inline struct xfs_icreate_item *ICR_ITEM(struct xfs_log_item *lip)
  46 {
  47         return container_of(lip, struct xfs_icreate_item, ic_item);
  48 }
  49
  50 /*
  51  * This returns the number of iovecs needed to log the given inode item.
  52  *
  53  * We only need one iovec for the icreate log structure.
  54  */
  55 STATIC uint
  56 xfs_icreate_item_size(
  57         struct xfs_log_item     *lip)
  58 {
  59         return 1;
  60 }
  61
  62 /*
  63  * This is called to fill in the vector of log iovecs for the
  64  * given inode create log item.
  65  */
  66 STATIC void
  67 xfs_icreate_item_format(
  68         struct xfs_log_item     *lip,
  69         struct xfs_log_iovec    *log_vector)
  70 {
  71         struct xfs_icreate_item *icp = ICR_ITEM(lip);
  72
  73         log_vector->i_addr = (xfs_caddr_t)&icp->ic_format;
  74         log_vector->i_len  = sizeof(struct xfs_icreate_log);
  75         log_vector->i_type = XLOG_REG_TYPE_ICREATE;
  76 }
  77
  78
  79 /* Pinning has no meaning for the create item, so just return. */
  80 STATIC void
  81 xfs_icreate_item_pin(
  82         struct xfs_log_item     *lip)
  83 {
  84 }
  85
  86
  87 /* pinning has no meaning for the create item, so just return. */
  88 STATIC void
  89 xfs_icreate_item_unpin(
  90         struct xfs_log_item     *lip,
  91         int                     remove)
  92 {
  93 }
  94
  95 STATIC void
  96 xfs_icreate_item_unlock(
  97         struct xfs_log_item     *lip)
  98 {
  99         struct xfs_icreate_item *icp = ICR_ITEM(lip);
 100
 101         if (icp->ic_item.li_flags & XFS_LI_ABORTED)
 102                 kmem_zone_free(xfs_icreate_zone, icp);
 103         return;
 104 }
 105
 106 /*
 107  * Because we have ordered buffers being tracked in the AIL for the inode
 108  * creation, we don't need the create item after this. Hence we can free
 109  * the log item and return -1 to tell the caller we're done with the item.
 110  */
 111 STATIC xfs_lsn_t
 112 xfs_icreate_item_committed(
 113         struct xfs_log_item     *lip,
 114         xfs_lsn_t               lsn)
 115 {
 116         struct xfs_icreate_item *icp = ICR_ITEM(lip);
 117
 118         kmem_zone_free(xfs_icreate_zone, icp);
 119         return (xfs_lsn_t)-1;
 120 }
 121
 122 /* item can never get into the AIL */
 123 STATIC uint
 124 xfs_icreate_item_push(
 125         struct xfs_log_item     *lip,
 126         struct list_head        *buffer_list)
 127 {
 128         ASSERT(0);
 129         return XFS_ITEM_SUCCESS;
 130 }
 131
 132 /* Ordered buffers do the dependency tracking here, so this does nothing. */
 133 STATIC void
 134 xfs_icreate_item_committing(
 135         struct xfs_log_item     *lip,
 136         xfs_lsn_t               lsn)
 137 {
 138 }
 139
 140 /*
 141  * This is the ops vector shared by all buf log items.
 142  */
 143 static struct xfs_item_ops xfs_icreate_item_ops = {
 144         .iop_size       = xfs_icreate_item_size,
 145         .iop_format     = xfs_icreate_item_format,
 146         .iop_pin        = xfs_icreate_item_pin,
 147         .iop_unpin      = xfs_icreate_item_unpin,
 148         .iop_push       = xfs_icreate_item_push,
 149         .iop_unlock     = xfs_icreate_item_unlock,
 150         .iop_committed  = xfs_icreate_item_committed,
 151         .iop_committing = xfs_icreate_item_committing,
 152 };
 153
 154
 155 /*
 156  * Initialize the inode log item for a newly allocated (in-core) inode.
 157  *
 158  * Inode extents can only reside within an AG. Hence specify the starting
 159  * block for the inode chunk by offset within an AG as well as the
 160  * length of the allocated extent.
 161  *
 162  * This joins the item to the transaction and marks it dirty so
 163  * that we don't need a separate call to do this, nor does the
 164  * caller need to know anything about the icreate item.
 165  */
 166 void
 167 xfs_icreate_log(
 168         struct xfs_trans        *tp,
 169         xfs_agnumber_t          agno,
 170         xfs_agblock_t           agbno,
 171         unsigned int            count,
 172         unsigned int            inode_size,
 173         xfs_agblock_t           length,
 174         unsigned int            generation)
 175 {
 176         struct xfs_icreate_item *icp;
 177
 178         icp = kmem_zone_zalloc(xfs_icreate_zone, KM_SLEEP);
 179
 180         xfs_log_item_init(tp->t_mountp, &icp->ic_item, XFS_LI_ICREATE,
 181                           &xfs_icreate_item_ops);
 182
 183         icp->ic_format.icl_type = XFS_LI_ICREATE;
 184         icp->ic_format.icl_size = 1;    /* single vector */
 185         icp->ic_format.icl_ag = cpu_to_be32(agno);
 186         icp->ic_format.icl_agbno = cpu_to_be32(agbno);
 187         icp->ic_format.icl_count = cpu_to_be32(count);
 188         icp->ic_format.icl_isize = cpu_to_be32(inode_size);
 189         icp->ic_format.icl_length = cpu_to_be32(length);
 190         icp->ic_format.icl_gen = cpu_to_be32(generation);
 191
 192         xfs_trans_add_item(tp, &icp->ic_item);
 193         tp->t_flags |= XFS_TRANS_DIRTY;
 194         icp->ic_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 195 }