fs/xfs/xfs_icreate_item.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2008-2010, 2013 Dave Chinner
   4  * All Rights Reserved.
   5  */
   6 #include "xfs.h"
   7 #include "xfs_fs.h"
   8 #include "xfs_shared.h"
   9 #include "xfs_format.h"
  10 #include "xfs_log_format.h"
  11 #include "xfs_trans_resv.h"
  12 #include "xfs_bit.h"
  13 #include "xfs_mount.h"
  14 #include "xfs_trans.h"
  15 #include "xfs_trans_priv.h"
  16 #include "xfs_error.h"
  17 #include "xfs_icreate_item.h"
  18 #include "xfs_log.h"
  19
  20 kmem_zone_t     *xfs_icreate_zone;              /* inode create item zone */
  21
  22 static inline struct xfs_icreate_item *ICR_ITEM(struct xfs_log_item *lip)
  23 {
  24         return container_of(lip, struct xfs_icreate_item, ic_item);
  25 }
  26
  27 /*
  28  * This returns the number of iovecs needed to log the given inode item.
  29  *
  30  * We only need one iovec for the icreate log structure.
  31  */
  32 STATIC void
  33 xfs_icreate_item_size(
  34         struct xfs_log_item     *lip,
  35         int                     *nvecs,
  36         int                     *nbytes)
  37 {
  38         *nvecs += 1;
  39         *nbytes += sizeof(struct xfs_icreate_log);
  40 }
  41
  42 /*
  43  * This is called to fill in the vector of log iovecs for the
  44  * given inode create log item.
  45  */
  46 STATIC void
  47 xfs_icreate_item_format(
  48         struct xfs_log_item     *lip,
  49         struct xfs_log_vec      *lv)
  50 {
  51         struct xfs_icreate_item *icp = ICR_ITEM(lip);
  52         struct xfs_log_iovec    *vecp = NULL;
  53
  54         xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ICREATE,
  55                         &icp->ic_format,
  56                         sizeof(struct xfs_icreate_log));
  57 }
  58
  59
  60 /* Pinning has no meaning for the create item, so just return. */
  61 STATIC void
  62 xfs_icreate_item_pin(
  63         struct xfs_log_item     *lip)
  64 {
  65 }
  66
  67
  68 /* pinning has no meaning for the create item, so just return. */
  69 STATIC void
  70 xfs_icreate_item_unpin(
  71         struct xfs_log_item     *lip,
  72         int                     remove)
  73 {
  74 }
  75
  76 STATIC void
  77 xfs_icreate_item_unlock(
  78         struct xfs_log_item     *lip)
  79 {
  80         struct xfs_icreate_item *icp = ICR_ITEM(lip);
  81
  82         if (test_bit(XFS_LI_ABORTED, &lip->li_flags))
  83                 kmem_zone_free(xfs_icreate_zone, icp);
  84         return;
  85 }
  86
  87 /*
  88  * Because we have ordered buffers being tracked in the AIL for the inode
  89  * creation, we don't need the create item after this. Hence we can free
  90  * the log item and return -1 to tell the caller we're done with the item.
  91  */
  92 STATIC xfs_lsn_t
  93 xfs_icreate_item_committed(
  94         struct xfs_log_item     *lip,
  95         xfs_lsn_t               lsn)
  96 {
  97         struct xfs_icreate_item *icp = ICR_ITEM(lip);
  98
  99         kmem_zone_free(xfs_icreate_zone, icp);
 100         return (xfs_lsn_t)-1;
 101 }
 102
 103 /* item can never get into the AIL */
 104 STATIC uint
 105 xfs_icreate_item_push(
 106         struct xfs_log_item     *lip,
 107         struct list_head        *buffer_list)
 108 {
 109         ASSERT(0);
 110         return XFS_ITEM_SUCCESS;
 111 }
 112
 113 /* Ordered buffers do the dependency tracking here, so this does nothing. */
 114 STATIC void
 115 xfs_icreate_item_committing(
 116         struct xfs_log_item     *lip,
 117         xfs_lsn_t               lsn)
 118 {
 119 }
 120
 121 /*
 122  * This is the ops vector shared by all buf log items.
 123  */
 124 static const struct xfs_item_ops xfs_icreate_item_ops = {
 125         .iop_size       = xfs_icreate_item_size,
 126         .iop_format     = xfs_icreate_item_format,
 127         .iop_pin        = xfs_icreate_item_pin,
 128         .iop_unpin      = xfs_icreate_item_unpin,
 129         .iop_push       = xfs_icreate_item_push,
 130         .iop_unlock     = xfs_icreate_item_unlock,
 131         .iop_committed  = xfs_icreate_item_committed,
 132         .iop_committing = xfs_icreate_item_committing,
 133 };
 134
 135
 136 /*
 137  * Initialize the inode log item for a newly allocated (in-core) inode.
 138  *
 139  * Inode extents can only reside within an AG. Hence specify the starting
 140  * block for the inode chunk by offset within an AG as well as the
 141  * length of the allocated extent.
 142  *
 143  * This joins the item to the transaction and marks it dirty so
 144  * that we don't need a separate call to do this, nor does the
 145  * caller need to know anything about the icreate item.
 146  */
 147 void
 148 xfs_icreate_log(
 149         struct xfs_trans        *tp,
 150         xfs_agnumber_t          agno,
 151         xfs_agblock_t           agbno,
 152         unsigned int            count,
 153         unsigned int            inode_size,
 154         xfs_agblock_t           length,
 155         unsigned int            generation)
 156 {
 157         struct xfs_icreate_item *icp;
 158
 159         icp = kmem_zone_zalloc(xfs_icreate_zone, KM_SLEEP);
 160
 161         xfs_log_item_init(tp->t_mountp, &icp->ic_item, XFS_LI_ICREATE,
 162                           &xfs_icreate_item_ops);
 163
 164         icp->ic_format.icl_type = XFS_LI_ICREATE;
 165         icp->ic_format.icl_size = 1;    /* single vector */
 166         icp->ic_format.icl_ag = cpu_to_be32(agno);
 167         icp->ic_format.icl_agbno = cpu_to_be32(agbno);
 168         icp->ic_format.icl_count = cpu_to_be32(count);
 169         icp->ic_format.icl_isize = cpu_to_be32(inode_size);
 170         icp->ic_format.icl_length = cpu_to_be32(length);
 171         icp->ic_format.icl_gen = cpu_to_be32(generation);
 172
 173         xfs_trans_add_item(tp, &icp->ic_item);
 174         tp->t_flags |= XFS_TRANS_DIRTY;
 175         set_bit(XFS_LI_DIRTY, &icp->ic_item.li_flags);
 176 }