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949 lines
31 KiB
949 lines
31 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
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* Copyright (C) 2010 Red Hat, Inc. |
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* All Rights Reserved. |
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*/ |
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#include "xfs.h" |
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#include "xfs_fs.h" |
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#include "xfs_shared.h" |
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#include "xfs_format.h" |
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#include "xfs_log_format.h" |
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#include "xfs_trans_resv.h" |
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#include "xfs_mount.h" |
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#include "xfs_da_format.h" |
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#include "xfs_da_btree.h" |
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#include "xfs_inode.h" |
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#include "xfs_bmap_btree.h" |
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#include "xfs_quota.h" |
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#include "xfs_trans.h" |
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#include "xfs_qm.h" |
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#include "xfs_trans_space.h" |
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|
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#define _ALLOC true |
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#define _FREE false |
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|
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/* |
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* A buffer has a format structure overhead in the log in addition |
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* to the data, so we need to take this into account when reserving |
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* space in a transaction for a buffer. Round the space required up |
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* to a multiple of 128 bytes so that we don't change the historical |
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* reservation that has been used for this overhead. |
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*/ |
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STATIC uint |
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xfs_buf_log_overhead(void) |
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{ |
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return round_up(sizeof(struct xlog_op_header) + |
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sizeof(struct xfs_buf_log_format), 128); |
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} |
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|
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/* |
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* Calculate out transaction log reservation per item in bytes. |
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* |
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* The nbufs argument is used to indicate the number of items that |
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* will be changed in a transaction. size is used to tell how many |
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* bytes should be reserved per item. |
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*/ |
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STATIC uint |
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xfs_calc_buf_res( |
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uint nbufs, |
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uint size) |
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{ |
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return nbufs * (size + xfs_buf_log_overhead()); |
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} |
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|
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/* |
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* Per-extent log reservation for the btree changes involved in freeing or |
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* allocating an extent. In classic XFS there were two trees that will be |
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* modified (bnobt + cntbt). With rmap enabled, there are three trees |
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* (rmapbt). With reflink, there are four trees (refcountbt). The number of |
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* blocks reserved is based on the formula: |
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* |
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* num trees * ((2 blocks/level * max depth) - 1) |
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* |
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* Keep in mind that max depth is calculated separately for each type of tree. |
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*/ |
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uint |
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xfs_allocfree_log_count( |
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struct xfs_mount *mp, |
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uint num_ops) |
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{ |
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uint blocks; |
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|
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blocks = num_ops * 2 * (2 * mp->m_ag_maxlevels - 1); |
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if (xfs_sb_version_hasrmapbt(&mp->m_sb)) |
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blocks += num_ops * (2 * mp->m_rmap_maxlevels - 1); |
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if (xfs_sb_version_hasreflink(&mp->m_sb)) |
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blocks += num_ops * (2 * mp->m_refc_maxlevels - 1); |
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|
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return blocks; |
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} |
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|
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/* |
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* Logging inodes is really tricksy. They are logged in memory format, |
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* which means that what we write into the log doesn't directly translate into |
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* the amount of space they use on disk. |
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* |
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* Case in point - btree format forks in memory format use more space than the |
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* on-disk format. In memory, the buffer contains a normal btree block header so |
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* the btree code can treat it as though it is just another generic buffer. |
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* However, when we write it to the inode fork, we don't write all of this |
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* header as it isn't needed. e.g. the root is only ever in the inode, so |
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* there's no need for sibling pointers which would waste 16 bytes of space. |
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* |
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* Hence when we have an inode with a maximally sized btree format fork, then |
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* amount of information we actually log is greater than the size of the inode |
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* on disk. Hence we need an inode reservation function that calculates all this |
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* correctly. So, we log: |
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* |
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* - 4 log op headers for object |
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* - for the ilf, the inode core and 2 forks |
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* - inode log format object |
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* - the inode core |
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* - two inode forks containing bmap btree root blocks. |
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* - the btree data contained by both forks will fit into the inode size, |
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* hence when combined with the inode core above, we have a total of the |
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* actual inode size. |
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* - the BMBT headers need to be accounted separately, as they are |
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* additional to the records and pointers that fit inside the inode |
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* forks. |
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*/ |
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STATIC uint |
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xfs_calc_inode_res( |
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struct xfs_mount *mp, |
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uint ninodes) |
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{ |
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return ninodes * |
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(4 * sizeof(struct xlog_op_header) + |
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sizeof(struct xfs_inode_log_format) + |
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mp->m_sb.sb_inodesize + |
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2 * XFS_BMBT_BLOCK_LEN(mp)); |
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} |
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|
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/* |
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* Inode btree record insertion/removal modifies the inode btree and free space |
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* btrees (since the inobt does not use the agfl). This requires the following |
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* reservation: |
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* |
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* the inode btree: max depth * blocksize |
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* the allocation btrees: 2 trees * (max depth - 1) * block size |
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* |
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* The caller must account for SB and AG header modifications, etc. |
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*/ |
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STATIC uint |
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xfs_calc_inobt_res( |
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struct xfs_mount *mp) |
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{ |
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return xfs_calc_buf_res(M_IGEO(mp)->inobt_maxlevels, |
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XFS_FSB_TO_B(mp, 1)) + |
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xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1), |
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XFS_FSB_TO_B(mp, 1)); |
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} |
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|
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/* |
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* The free inode btree is a conditional feature. The behavior differs slightly |
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* from that of the traditional inode btree in that the finobt tracks records |
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* for inode chunks with at least one free inode. A record can be removed from |
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* the tree during individual inode allocation. Therefore the finobt |
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* reservation is unconditional for both the inode chunk allocation and |
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* individual inode allocation (modify) cases. |
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* |
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* Behavior aside, the reservation for finobt modification is equivalent to the |
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* traditional inobt: cover a full finobt shape change plus block allocation. |
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*/ |
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STATIC uint |
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xfs_calc_finobt_res( |
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struct xfs_mount *mp) |
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{ |
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if (!xfs_sb_version_hasfinobt(&mp->m_sb)) |
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return 0; |
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|
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return xfs_calc_inobt_res(mp); |
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} |
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|
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/* |
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* Calculate the reservation required to allocate or free an inode chunk. This |
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* includes: |
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* |
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* the allocation btrees: 2 trees * (max depth - 1) * block size |
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* the inode chunk: m_ino_geo.ialloc_blks * N |
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* |
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* The size N of the inode chunk reservation depends on whether it is for |
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* allocation or free and which type of create transaction is in use. An inode |
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* chunk free always invalidates the buffers and only requires reservation for |
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* headers (N == 0). An inode chunk allocation requires a chunk sized |
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* reservation on v4 and older superblocks to initialize the chunk. No chunk |
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* reservation is required for allocation on v5 supers, which use ordered |
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* buffers to initialize. |
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*/ |
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STATIC uint |
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xfs_calc_inode_chunk_res( |
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struct xfs_mount *mp, |
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bool alloc) |
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{ |
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uint res, size = 0; |
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|
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res = xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1), |
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XFS_FSB_TO_B(mp, 1)); |
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if (alloc) { |
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/* icreate tx uses ordered buffers */ |
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if (xfs_sb_version_has_v3inode(&mp->m_sb)) |
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return res; |
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size = XFS_FSB_TO_B(mp, 1); |
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} |
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res += xfs_calc_buf_res(M_IGEO(mp)->ialloc_blks, size); |
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return res; |
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} |
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|
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/* |
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* Per-extent log reservation for the btree changes involved in freeing or |
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* allocating a realtime extent. We have to be able to log as many rtbitmap |
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* blocks as needed to mark inuse MAXEXTLEN blocks' worth of realtime extents, |
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* as well as the realtime summary block. |
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*/ |
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static unsigned int |
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xfs_rtalloc_log_count( |
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struct xfs_mount *mp, |
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unsigned int num_ops) |
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{ |
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unsigned int blksz = XFS_FSB_TO_B(mp, 1); |
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unsigned int rtbmp_bytes; |
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rtbmp_bytes = (MAXEXTLEN / mp->m_sb.sb_rextsize) / NBBY; |
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return (howmany(rtbmp_bytes, blksz) + 1) * num_ops; |
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} |
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|
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/* |
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* Various log reservation values. |
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* |
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* These are based on the size of the file system block because that is what |
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* most transactions manipulate. Each adds in an additional 128 bytes per |
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* item logged to try to account for the overhead of the transaction mechanism. |
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* |
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* Note: Most of the reservations underestimate the number of allocation |
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* groups into which they could free extents in the xfs_defer_finish() call. |
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* This is because the number in the worst case is quite high and quite |
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* unusual. In order to fix this we need to change xfs_defer_finish() to free |
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* extents in only a single AG at a time. This will require changes to the |
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* EFI code as well, however, so that the EFI for the extents not freed is |
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* logged again in each transaction. See SGI PV #261917. |
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* |
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* Reservation functions here avoid a huge stack in xfs_trans_init due to |
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* register overflow from temporaries in the calculations. |
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*/ |
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|
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/* |
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* In a write transaction we can allocate a maximum of 2 |
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* extents. This gives (t1): |
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* the inode getting the new extents: inode size |
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* the inode's bmap btree: max depth * block size |
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* the agfs of the ags from which the extents are allocated: 2 * sector |
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* the superblock free block counter: sector size |
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* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size |
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* Or, if we're writing to a realtime file (t2): |
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* the inode getting the new extents: inode size |
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* the inode's bmap btree: max depth * block size |
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* the agfs of the ags from which the extents are allocated: 2 * sector |
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* the superblock free block counter: sector size |
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* the realtime bitmap: ((MAXEXTLEN / rtextsize) / NBBY) bytes |
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* the realtime summary: 1 block |
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* the allocation btrees: 2 trees * (2 * max depth - 1) * block size |
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* And the bmap_finish transaction can free bmap blocks in a join (t3): |
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* the agfs of the ags containing the blocks: 2 * sector size |
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* the agfls of the ags containing the blocks: 2 * sector size |
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* the super block free block counter: sector size |
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* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size |
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*/ |
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STATIC uint |
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xfs_calc_write_reservation( |
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struct xfs_mount *mp) |
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{ |
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unsigned int t1, t2, t3; |
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unsigned int blksz = XFS_FSB_TO_B(mp, 1); |
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|
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t1 = xfs_calc_inode_res(mp, 1) + |
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xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), blksz) + |
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xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + |
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xfs_calc_buf_res(xfs_allocfree_log_count(mp, 2), blksz); |
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|
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if (xfs_sb_version_hasrealtime(&mp->m_sb)) { |
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t2 = xfs_calc_inode_res(mp, 1) + |
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xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), |
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blksz) + |
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xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + |
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xfs_calc_buf_res(xfs_rtalloc_log_count(mp, 1), blksz) + |
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xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1), blksz); |
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} else { |
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t2 = 0; |
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} |
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t3 = xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) + |
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xfs_calc_buf_res(xfs_allocfree_log_count(mp, 2), blksz); |
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|
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return XFS_DQUOT_LOGRES(mp) + max3(t1, t2, t3); |
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} |
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|
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/* |
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* In truncating a file we free up to two extents at once. We can modify (t1): |
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* the inode being truncated: inode size |
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* the inode's bmap btree: (max depth + 1) * block size |
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* And the bmap_finish transaction can free the blocks and bmap blocks (t2): |
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* the agf for each of the ags: 4 * sector size |
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* the agfl for each of the ags: 4 * sector size |
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* the super block to reflect the freed blocks: sector size |
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* worst case split in allocation btrees per extent assuming 4 extents: |
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* 4 exts * 2 trees * (2 * max depth - 1) * block size |
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* Or, if it's a realtime file (t3): |
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* the agf for each of the ags: 2 * sector size |
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* the agfl for each of the ags: 2 * sector size |
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* the super block to reflect the freed blocks: sector size |
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* the realtime bitmap: 2 exts * ((MAXEXTLEN / rtextsize) / NBBY) bytes |
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* the realtime summary: 2 exts * 1 block |
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* worst case split in allocation btrees per extent assuming 2 extents: |
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* 2 exts * 2 trees * (2 * max depth - 1) * block size |
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*/ |
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STATIC uint |
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xfs_calc_itruncate_reservation( |
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struct xfs_mount *mp) |
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{ |
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unsigned int t1, t2, t3; |
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unsigned int blksz = XFS_FSB_TO_B(mp, 1); |
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|
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t1 = xfs_calc_inode_res(mp, 1) + |
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xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1, blksz); |
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|
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t2 = xfs_calc_buf_res(9, mp->m_sb.sb_sectsize) + |
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xfs_calc_buf_res(xfs_allocfree_log_count(mp, 4), blksz); |
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|
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if (xfs_sb_version_hasrealtime(&mp->m_sb)) { |
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t3 = xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) + |
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xfs_calc_buf_res(xfs_rtalloc_log_count(mp, 2), blksz) + |
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xfs_calc_buf_res(xfs_allocfree_log_count(mp, 2), blksz); |
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} else { |
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t3 = 0; |
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} |
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|
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return XFS_DQUOT_LOGRES(mp) + max3(t1, t2, t3); |
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} |
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|
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/* |
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* In renaming a files we can modify: |
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* the four inodes involved: 4 * inode size |
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* the two directory btrees: 2 * (max depth + v2) * dir block size |
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* the two directory bmap btrees: 2 * max depth * block size |
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* And the bmap_finish transaction can free dir and bmap blocks (two sets |
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* of bmap blocks) giving: |
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* the agf for the ags in which the blocks live: 3 * sector size |
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* the agfl for the ags in which the blocks live: 3 * sector size |
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* the superblock for the free block count: sector size |
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* the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size |
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*/ |
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STATIC uint |
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xfs_calc_rename_reservation( |
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struct xfs_mount *mp) |
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{ |
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return XFS_DQUOT_LOGRES(mp) + |
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max((xfs_calc_inode_res(mp, 4) + |
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xfs_calc_buf_res(2 * XFS_DIROP_LOG_COUNT(mp), |
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XFS_FSB_TO_B(mp, 1))), |
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(xfs_calc_buf_res(7, mp->m_sb.sb_sectsize) + |
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xfs_calc_buf_res(xfs_allocfree_log_count(mp, 3), |
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XFS_FSB_TO_B(mp, 1)))); |
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} |
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|
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/* |
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* For removing an inode from unlinked list at first, we can modify: |
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* the agi hash list and counters: sector size |
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* the on disk inode before ours in the agi hash list: inode cluster size |
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* the on disk inode in the agi hash list: inode cluster size |
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*/ |
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STATIC uint |
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xfs_calc_iunlink_remove_reservation( |
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struct xfs_mount *mp) |
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{ |
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return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
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2 * M_IGEO(mp)->inode_cluster_size; |
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} |
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|
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/* |
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* For creating a link to an inode: |
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* the parent directory inode: inode size |
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* the linked inode: inode size |
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* the directory btree could split: (max depth + v2) * dir block size |
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* the directory bmap btree could join or split: (max depth + v2) * blocksize |
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* And the bmap_finish transaction can free some bmap blocks giving: |
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* the agf for the ag in which the blocks live: sector size |
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* the agfl for the ag in which the blocks live: sector size |
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* the superblock for the free block count: sector size |
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* the allocation btrees: 2 trees * (2 * max depth - 1) * block size |
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*/ |
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STATIC uint |
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xfs_calc_link_reservation( |
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struct xfs_mount *mp) |
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{ |
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return XFS_DQUOT_LOGRES(mp) + |
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xfs_calc_iunlink_remove_reservation(mp) + |
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max((xfs_calc_inode_res(mp, 2) + |
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xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), |
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XFS_FSB_TO_B(mp, 1))), |
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(xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + |
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xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1), |
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XFS_FSB_TO_B(mp, 1)))); |
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} |
|
|
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/* |
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* For adding an inode to unlinked list we can modify: |
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* the agi hash list: sector size |
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* the on disk inode: inode cluster size |
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*/ |
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STATIC uint |
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xfs_calc_iunlink_add_reservation(xfs_mount_t *mp) |
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{ |
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return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
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M_IGEO(mp)->inode_cluster_size; |
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} |
|
|
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/* |
|
* For removing a directory entry we can modify: |
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* the parent directory inode: inode size |
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* the removed inode: inode size |
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* the directory btree could join: (max depth + v2) * dir block size |
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* the directory bmap btree could join or split: (max depth + v2) * blocksize |
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* And the bmap_finish transaction can free the dir and bmap blocks giving: |
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* the agf for the ag in which the blocks live: 2 * sector size |
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* the agfl for the ag in which the blocks live: 2 * sector size |
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* the superblock for the free block count: sector size |
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* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size |
|
*/ |
|
STATIC uint |
|
xfs_calc_remove_reservation( |
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struct xfs_mount *mp) |
|
{ |
|
return XFS_DQUOT_LOGRES(mp) + |
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xfs_calc_iunlink_add_reservation(mp) + |
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max((xfs_calc_inode_res(mp, 1) + |
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xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), |
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XFS_FSB_TO_B(mp, 1))), |
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(xfs_calc_buf_res(4, mp->m_sb.sb_sectsize) + |
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xfs_calc_buf_res(xfs_allocfree_log_count(mp, 2), |
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XFS_FSB_TO_B(mp, 1)))); |
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} |
|
|
|
/* |
|
* For create, break it in to the two cases that the transaction |
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* covers. We start with the modify case - allocation done by modification |
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* of the state of existing inodes - and the allocation case. |
|
*/ |
|
|
|
/* |
|
* For create we can modify: |
|
* the parent directory inode: inode size |
|
* the new inode: inode size |
|
* the inode btree entry: block size |
|
* the superblock for the nlink flag: sector size |
|
* the directory btree: (max depth + v2) * dir block size |
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* the directory inode's bmap btree: (max depth + v2) * block size |
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* the finobt (record modification and allocation btrees) |
|
*/ |
|
STATIC uint |
|
xfs_calc_create_resv_modify( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_inode_res(mp, 2) + |
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xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
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(uint)XFS_FSB_TO_B(mp, 1) + |
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xfs_calc_buf_res(XFS_DIROP_LOG_COUNT(mp), XFS_FSB_TO_B(mp, 1)) + |
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xfs_calc_finobt_res(mp); |
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} |
|
|
|
/* |
|
* For icreate we can allocate some inodes giving: |
|
* the agi and agf of the ag getting the new inodes: 2 * sectorsize |
|
* the superblock for the nlink flag: sector size |
|
* the inode chunk (allocation, optional init) |
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* the inobt (record insertion) |
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* the finobt (optional, record insertion) |
|
*/ |
|
STATIC uint |
|
xfs_calc_icreate_resv_alloc( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + |
|
mp->m_sb.sb_sectsize + |
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xfs_calc_inode_chunk_res(mp, _ALLOC) + |
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xfs_calc_inobt_res(mp) + |
|
xfs_calc_finobt_res(mp); |
|
} |
|
|
|
STATIC uint |
|
xfs_calc_icreate_reservation(xfs_mount_t *mp) |
|
{ |
|
return XFS_DQUOT_LOGRES(mp) + |
|
max(xfs_calc_icreate_resv_alloc(mp), |
|
xfs_calc_create_resv_modify(mp)); |
|
} |
|
|
|
STATIC uint |
|
xfs_calc_create_tmpfile_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
uint res = XFS_DQUOT_LOGRES(mp); |
|
|
|
res += xfs_calc_icreate_resv_alloc(mp); |
|
return res + xfs_calc_iunlink_add_reservation(mp); |
|
} |
|
|
|
/* |
|
* Making a new directory is the same as creating a new file. |
|
*/ |
|
STATIC uint |
|
xfs_calc_mkdir_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_icreate_reservation(mp); |
|
} |
|
|
|
|
|
/* |
|
* Making a new symplink is the same as creating a new file, but |
|
* with the added blocks for remote symlink data which can be up to 1kB in |
|
* length (XFS_SYMLINK_MAXLEN). |
|
*/ |
|
STATIC uint |
|
xfs_calc_symlink_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_icreate_reservation(mp) + |
|
xfs_calc_buf_res(1, XFS_SYMLINK_MAXLEN); |
|
} |
|
|
|
/* |
|
* In freeing an inode we can modify: |
|
* the inode being freed: inode size |
|
* the super block free inode counter, AGF and AGFL: sector size |
|
* the on disk inode (agi unlinked list removal) |
|
* the inode chunk (invalidated, headers only) |
|
* the inode btree |
|
* the finobt (record insertion, removal or modification) |
|
* |
|
* Note that the inode chunk res. includes an allocfree res. for freeing of the |
|
* inode chunk. This is technically extraneous because the inode chunk free is |
|
* deferred (it occurs after a transaction roll). Include the extra reservation |
|
* anyways since we've had reports of ifree transaction overruns due to too many |
|
* agfl fixups during inode chunk frees. |
|
*/ |
|
STATIC uint |
|
xfs_calc_ifree_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return XFS_DQUOT_LOGRES(mp) + |
|
xfs_calc_inode_res(mp, 1) + |
|
xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + |
|
xfs_calc_iunlink_remove_reservation(mp) + |
|
xfs_calc_inode_chunk_res(mp, _FREE) + |
|
xfs_calc_inobt_res(mp) + |
|
xfs_calc_finobt_res(mp); |
|
} |
|
|
|
/* |
|
* When only changing the inode we log the inode and possibly the superblock |
|
* We also add a bit of slop for the transaction stuff. |
|
*/ |
|
STATIC uint |
|
xfs_calc_ichange_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return XFS_DQUOT_LOGRES(mp) + |
|
xfs_calc_inode_res(mp, 1) + |
|
xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); |
|
|
|
} |
|
|
|
/* |
|
* Growing the data section of the filesystem. |
|
* superblock |
|
* agi and agf |
|
* allocation btrees |
|
*/ |
|
STATIC uint |
|
xfs_calc_growdata_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_buf_res(3, mp->m_sb.sb_sectsize) + |
|
xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1), |
|
XFS_FSB_TO_B(mp, 1)); |
|
} |
|
|
|
/* |
|
* Growing the rt section of the filesystem. |
|
* In the first set of transactions (ALLOC) we allocate space to the |
|
* bitmap or summary files. |
|
* superblock: sector size |
|
* agf of the ag from which the extent is allocated: sector size |
|
* bmap btree for bitmap/summary inode: max depth * blocksize |
|
* bitmap/summary inode: inode size |
|
* allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize |
|
*/ |
|
STATIC uint |
|
xfs_calc_growrtalloc_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + |
|
xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), |
|
XFS_FSB_TO_B(mp, 1)) + |
|
xfs_calc_inode_res(mp, 1) + |
|
xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1), |
|
XFS_FSB_TO_B(mp, 1)); |
|
} |
|
|
|
/* |
|
* Growing the rt section of the filesystem. |
|
* In the second set of transactions (ZERO) we zero the new metadata blocks. |
|
* one bitmap/summary block: blocksize |
|
*/ |
|
STATIC uint |
|
xfs_calc_growrtzero_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_buf_res(1, mp->m_sb.sb_blocksize); |
|
} |
|
|
|
/* |
|
* Growing the rt section of the filesystem. |
|
* In the third set of transactions (FREE) we update metadata without |
|
* allocating any new blocks. |
|
* superblock: sector size |
|
* bitmap inode: inode size |
|
* summary inode: inode size |
|
* one bitmap block: blocksize |
|
* summary blocks: new summary size |
|
*/ |
|
STATIC uint |
|
xfs_calc_growrtfree_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
|
xfs_calc_inode_res(mp, 2) + |
|
xfs_calc_buf_res(1, mp->m_sb.sb_blocksize) + |
|
xfs_calc_buf_res(1, mp->m_rsumsize); |
|
} |
|
|
|
/* |
|
* Logging the inode modification timestamp on a synchronous write. |
|
* inode |
|
*/ |
|
STATIC uint |
|
xfs_calc_swrite_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_inode_res(mp, 1); |
|
} |
|
|
|
/* |
|
* Logging the inode mode bits when writing a setuid/setgid file |
|
* inode |
|
*/ |
|
STATIC uint |
|
xfs_calc_writeid_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_inode_res(mp, 1); |
|
} |
|
|
|
/* |
|
* Converting the inode from non-attributed to attributed. |
|
* the inode being converted: inode size |
|
* agf block and superblock (for block allocation) |
|
* the new block (directory sized) |
|
* bmap blocks for the new directory block |
|
* allocation btrees |
|
*/ |
|
STATIC uint |
|
xfs_calc_addafork_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return XFS_DQUOT_LOGRES(mp) + |
|
xfs_calc_inode_res(mp, 1) + |
|
xfs_calc_buf_res(2, mp->m_sb.sb_sectsize) + |
|
xfs_calc_buf_res(1, mp->m_dir_geo->blksize) + |
|
xfs_calc_buf_res(XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1, |
|
XFS_FSB_TO_B(mp, 1)) + |
|
xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1), |
|
XFS_FSB_TO_B(mp, 1)); |
|
} |
|
|
|
/* |
|
* Removing the attribute fork of a file |
|
* the inode being truncated: inode size |
|
* the inode's bmap btree: max depth * block size |
|
* And the bmap_finish transaction can free the blocks and bmap blocks: |
|
* the agf for each of the ags: 4 * sector size |
|
* the agfl for each of the ags: 4 * sector size |
|
* the super block to reflect the freed blocks: sector size |
|
* worst case split in allocation btrees per extent assuming 4 extents: |
|
* 4 exts * 2 trees * (2 * max depth - 1) * block size |
|
*/ |
|
STATIC uint |
|
xfs_calc_attrinval_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return max((xfs_calc_inode_res(mp, 1) + |
|
xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK), |
|
XFS_FSB_TO_B(mp, 1))), |
|
(xfs_calc_buf_res(9, mp->m_sb.sb_sectsize) + |
|
xfs_calc_buf_res(xfs_allocfree_log_count(mp, 4), |
|
XFS_FSB_TO_B(mp, 1)))); |
|
} |
|
|
|
/* |
|
* Setting an attribute at mount time. |
|
* the inode getting the attribute |
|
* the superblock for allocations |
|
* the agfs extents are allocated from |
|
* the attribute btree * max depth |
|
* the inode allocation btree |
|
* Since attribute transaction space is dependent on the size of the attribute, |
|
* the calculation is done partially at mount time and partially at runtime(see |
|
* below). |
|
*/ |
|
STATIC uint |
|
xfs_calc_attrsetm_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return XFS_DQUOT_LOGRES(mp) + |
|
xfs_calc_inode_res(mp, 1) + |
|
xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
|
xfs_calc_buf_res(XFS_DA_NODE_MAXDEPTH, XFS_FSB_TO_B(mp, 1)); |
|
} |
|
|
|
/* |
|
* Setting an attribute at runtime, transaction space unit per block. |
|
* the superblock for allocations: sector size |
|
* the inode bmap btree could join or split: max depth * block size |
|
* Since the runtime attribute transaction space is dependent on the total |
|
* blocks needed for the 1st bmap, here we calculate out the space unit for |
|
* one block so that the caller could figure out the total space according |
|
* to the attibute extent length in blocks by: |
|
* ext * M_RES(mp)->tr_attrsetrt.tr_logres |
|
*/ |
|
STATIC uint |
|
xfs_calc_attrsetrt_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) + |
|
xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK), |
|
XFS_FSB_TO_B(mp, 1)); |
|
} |
|
|
|
/* |
|
* Removing an attribute. |
|
* the inode: inode size |
|
* the attribute btree could join: max depth * block size |
|
* the inode bmap btree could join or split: max depth * block size |
|
* And the bmap_finish transaction can free the attr blocks freed giving: |
|
* the agf for the ag in which the blocks live: 2 * sector size |
|
* the agfl for the ag in which the blocks live: 2 * sector size |
|
* the superblock for the free block count: sector size |
|
* the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size |
|
*/ |
|
STATIC uint |
|
xfs_calc_attrrm_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return XFS_DQUOT_LOGRES(mp) + |
|
max((xfs_calc_inode_res(mp, 1) + |
|
xfs_calc_buf_res(XFS_DA_NODE_MAXDEPTH, |
|
XFS_FSB_TO_B(mp, 1)) + |
|
(uint)XFS_FSB_TO_B(mp, |
|
XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + |
|
xfs_calc_buf_res(XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK), 0)), |
|
(xfs_calc_buf_res(5, mp->m_sb.sb_sectsize) + |
|
xfs_calc_buf_res(xfs_allocfree_log_count(mp, 2), |
|
XFS_FSB_TO_B(mp, 1)))); |
|
} |
|
|
|
/* |
|
* Clearing a bad agino number in an agi hash bucket. |
|
*/ |
|
STATIC uint |
|
xfs_calc_clear_agi_bucket_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); |
|
} |
|
|
|
/* |
|
* Adjusting quota limits. |
|
* the disk quota buffer: sizeof(struct xfs_disk_dquot) |
|
*/ |
|
STATIC uint |
|
xfs_calc_qm_setqlim_reservation(void) |
|
{ |
|
return xfs_calc_buf_res(1, sizeof(struct xfs_disk_dquot)); |
|
} |
|
|
|
/* |
|
* Allocating quota on disk if needed. |
|
* the write transaction log space for quota file extent allocation |
|
* the unit of quota allocation: one system block size |
|
*/ |
|
STATIC uint |
|
xfs_calc_qm_dqalloc_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_write_reservation(mp) + |
|
xfs_calc_buf_res(1, |
|
XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) - 1); |
|
} |
|
|
|
/* |
|
* Turning off quotas. |
|
* the quota off logitems: sizeof(struct xfs_qoff_logitem) * 2 |
|
* the superblock for the quota flags: sector size |
|
*/ |
|
STATIC uint |
|
xfs_calc_qm_quotaoff_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return sizeof(struct xfs_qoff_logitem) * 2 + |
|
xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); |
|
} |
|
|
|
/* |
|
* End of turning off quotas. |
|
* the quota off logitems: sizeof(struct xfs_qoff_logitem) * 2 |
|
*/ |
|
STATIC uint |
|
xfs_calc_qm_quotaoff_end_reservation(void) |
|
{ |
|
return sizeof(struct xfs_qoff_logitem) * 2; |
|
} |
|
|
|
/* |
|
* Syncing the incore super block changes to disk. |
|
* the super block to reflect the changes: sector size |
|
*/ |
|
STATIC uint |
|
xfs_calc_sb_reservation( |
|
struct xfs_mount *mp) |
|
{ |
|
return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize); |
|
} |
|
|
|
void |
|
xfs_trans_resv_calc( |
|
struct xfs_mount *mp, |
|
struct xfs_trans_resv *resp) |
|
{ |
|
/* |
|
* The following transactions are logged in physical format and |
|
* require a permanent reservation on space. |
|
*/ |
|
resp->tr_write.tr_logres = xfs_calc_write_reservation(mp); |
|
if (xfs_sb_version_hasreflink(&mp->m_sb)) |
|
resp->tr_write.tr_logcount = XFS_WRITE_LOG_COUNT_REFLINK; |
|
else |
|
resp->tr_write.tr_logcount = XFS_WRITE_LOG_COUNT; |
|
resp->tr_write.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_itruncate.tr_logres = xfs_calc_itruncate_reservation(mp); |
|
if (xfs_sb_version_hasreflink(&mp->m_sb)) |
|
resp->tr_itruncate.tr_logcount = |
|
XFS_ITRUNCATE_LOG_COUNT_REFLINK; |
|
else |
|
resp->tr_itruncate.tr_logcount = XFS_ITRUNCATE_LOG_COUNT; |
|
resp->tr_itruncate.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_rename.tr_logres = xfs_calc_rename_reservation(mp); |
|
resp->tr_rename.tr_logcount = XFS_RENAME_LOG_COUNT; |
|
resp->tr_rename.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_link.tr_logres = xfs_calc_link_reservation(mp); |
|
resp->tr_link.tr_logcount = XFS_LINK_LOG_COUNT; |
|
resp->tr_link.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_remove.tr_logres = xfs_calc_remove_reservation(mp); |
|
resp->tr_remove.tr_logcount = XFS_REMOVE_LOG_COUNT; |
|
resp->tr_remove.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_symlink.tr_logres = xfs_calc_symlink_reservation(mp); |
|
resp->tr_symlink.tr_logcount = XFS_SYMLINK_LOG_COUNT; |
|
resp->tr_symlink.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_create.tr_logres = xfs_calc_icreate_reservation(mp); |
|
resp->tr_create.tr_logcount = XFS_CREATE_LOG_COUNT; |
|
resp->tr_create.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_create_tmpfile.tr_logres = |
|
xfs_calc_create_tmpfile_reservation(mp); |
|
resp->tr_create_tmpfile.tr_logcount = XFS_CREATE_TMPFILE_LOG_COUNT; |
|
resp->tr_create_tmpfile.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_mkdir.tr_logres = xfs_calc_mkdir_reservation(mp); |
|
resp->tr_mkdir.tr_logcount = XFS_MKDIR_LOG_COUNT; |
|
resp->tr_mkdir.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_ifree.tr_logres = xfs_calc_ifree_reservation(mp); |
|
resp->tr_ifree.tr_logcount = XFS_INACTIVE_LOG_COUNT; |
|
resp->tr_ifree.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_addafork.tr_logres = xfs_calc_addafork_reservation(mp); |
|
resp->tr_addafork.tr_logcount = XFS_ADDAFORK_LOG_COUNT; |
|
resp->tr_addafork.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_attrinval.tr_logres = xfs_calc_attrinval_reservation(mp); |
|
resp->tr_attrinval.tr_logcount = XFS_ATTRINVAL_LOG_COUNT; |
|
resp->tr_attrinval.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_attrsetm.tr_logres = xfs_calc_attrsetm_reservation(mp); |
|
resp->tr_attrsetm.tr_logcount = XFS_ATTRSET_LOG_COUNT; |
|
resp->tr_attrsetm.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_attrrm.tr_logres = xfs_calc_attrrm_reservation(mp); |
|
resp->tr_attrrm.tr_logcount = XFS_ATTRRM_LOG_COUNT; |
|
resp->tr_attrrm.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_growrtalloc.tr_logres = xfs_calc_growrtalloc_reservation(mp); |
|
resp->tr_growrtalloc.tr_logcount = XFS_DEFAULT_PERM_LOG_COUNT; |
|
resp->tr_growrtalloc.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
resp->tr_qm_dqalloc.tr_logres = xfs_calc_qm_dqalloc_reservation(mp); |
|
if (xfs_sb_version_hasreflink(&mp->m_sb)) |
|
resp->tr_qm_dqalloc.tr_logcount = XFS_WRITE_LOG_COUNT_REFLINK; |
|
else |
|
resp->tr_qm_dqalloc.tr_logcount = XFS_WRITE_LOG_COUNT; |
|
resp->tr_qm_dqalloc.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
/* |
|
* The following transactions are logged in logical format with |
|
* a default log count. |
|
*/ |
|
resp->tr_qm_setqlim.tr_logres = xfs_calc_qm_setqlim_reservation(); |
|
resp->tr_qm_setqlim.tr_logcount = XFS_DEFAULT_LOG_COUNT; |
|
|
|
resp->tr_qm_quotaoff.tr_logres = xfs_calc_qm_quotaoff_reservation(mp); |
|
resp->tr_qm_quotaoff.tr_logcount = XFS_DEFAULT_LOG_COUNT; |
|
|
|
resp->tr_qm_equotaoff.tr_logres = |
|
xfs_calc_qm_quotaoff_end_reservation(); |
|
resp->tr_qm_equotaoff.tr_logcount = XFS_DEFAULT_LOG_COUNT; |
|
|
|
resp->tr_sb.tr_logres = xfs_calc_sb_reservation(mp); |
|
resp->tr_sb.tr_logcount = XFS_DEFAULT_LOG_COUNT; |
|
|
|
/* growdata requires permanent res; it can free space to the last AG */ |
|
resp->tr_growdata.tr_logres = xfs_calc_growdata_reservation(mp); |
|
resp->tr_growdata.tr_logcount = XFS_DEFAULT_PERM_LOG_COUNT; |
|
resp->tr_growdata.tr_logflags |= XFS_TRANS_PERM_LOG_RES; |
|
|
|
/* The following transaction are logged in logical format */ |
|
resp->tr_ichange.tr_logres = xfs_calc_ichange_reservation(mp); |
|
resp->tr_fsyncts.tr_logres = xfs_calc_swrite_reservation(mp); |
|
resp->tr_writeid.tr_logres = xfs_calc_writeid_reservation(mp); |
|
resp->tr_attrsetrt.tr_logres = xfs_calc_attrsetrt_reservation(mp); |
|
resp->tr_clearagi.tr_logres = xfs_calc_clear_agi_bucket_reservation(mp); |
|
resp->tr_growrtzero.tr_logres = xfs_calc_growrtzero_reservation(mp); |
|
resp->tr_growrtfree.tr_logres = xfs_calc_growrtfree_reservation(mp); |
|
}
|
|
|