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-rw-r--r--fs/xfs/libxfs/xfs_trans_resv.h105
1 files changed, 105 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_trans_resv.h b/fs/xfs/libxfs/xfs_trans_resv.h
new file mode 100644
index 000000000..0554b9d77
--- /dev/null
+++ b/fs/xfs/libxfs/xfs_trans_resv.h
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+#ifndef __XFS_TRANS_RESV_H__
+#define __XFS_TRANS_RESV_H__
+
+struct xfs_mount;
+
+/*
+ * structure for maintaining pre-calculated transaction reservations.
+ */
+struct xfs_trans_res {
+ uint tr_logres; /* log space unit in bytes per log ticket */
+ int tr_logcount; /* number of log operations per log ticket */
+ int tr_logflags; /* log flags, currently only used for indicating
+ * a reservation request is permanent or not */
+};
+
+struct xfs_trans_resv {
+ struct xfs_trans_res tr_write; /* extent alloc trans */
+ struct xfs_trans_res tr_itruncate; /* truncate trans */
+ struct xfs_trans_res tr_rename; /* rename trans */
+ struct xfs_trans_res tr_link; /* link trans */
+ struct xfs_trans_res tr_remove; /* unlink trans */
+ struct xfs_trans_res tr_symlink; /* symlink trans */
+ struct xfs_trans_res tr_create; /* create trans */
+ struct xfs_trans_res tr_create_tmpfile; /* create O_TMPFILE trans */
+ struct xfs_trans_res tr_mkdir; /* mkdir trans */
+ struct xfs_trans_res tr_ifree; /* inode free trans */
+ struct xfs_trans_res tr_ichange; /* inode update trans */
+ struct xfs_trans_res tr_growdata; /* fs data section grow trans */
+ struct xfs_trans_res tr_addafork; /* add inode attr fork trans */
+ struct xfs_trans_res tr_writeid; /* write setuid/setgid file */
+ struct xfs_trans_res tr_attrinval; /* attr fork buffer
+ * invalidation */
+ struct xfs_trans_res tr_attrsetm; /* set/create an attribute at
+ * mount time */
+ struct xfs_trans_res tr_attrsetrt; /* set/create an attribute at
+ * runtime */
+ struct xfs_trans_res tr_attrrm; /* remove an attribute */
+ struct xfs_trans_res tr_clearagi; /* clear agi unlinked bucket */
+ struct xfs_trans_res tr_growrtalloc; /* grow realtime allocations */
+ struct xfs_trans_res tr_growrtzero; /* grow realtime zeroing */
+ struct xfs_trans_res tr_growrtfree; /* grow realtime freeing */
+ struct xfs_trans_res tr_qm_setqlim; /* adjust quota limits */
+ struct xfs_trans_res tr_qm_dqalloc; /* allocate quota on disk */
+ struct xfs_trans_res tr_sb; /* modify superblock */
+ struct xfs_trans_res tr_fsyncts; /* update timestamps on fsync */
+};
+
+/* shorthand way of accessing reservation structure */
+#define M_RES(mp) (&(mp)->m_resv)
+
+/*
+ * Per-directory log reservation for any directory change.
+ * dir blocks: (1 btree block per level + data block + free block) * dblock size
+ * bmap btree: (levels + 2) * max depth * block size
+ * v2 directory blocks can be fragmented below the dirblksize down to the fsb
+ * size, so account for that in the DAENTER macros.
+ */
+#define XFS_DIROP_LOG_RES(mp) \
+ (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
+ (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
+#define XFS_DIROP_LOG_COUNT(mp) \
+ (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
+ XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
+
+/*
+ * Various log count values.
+ */
+#define XFS_DEFAULT_LOG_COUNT 1
+#define XFS_DEFAULT_PERM_LOG_COUNT 2
+#define XFS_ITRUNCATE_LOG_COUNT 2
+#define XFS_INACTIVE_LOG_COUNT 2
+#define XFS_CREATE_LOG_COUNT 2
+#define XFS_CREATE_TMPFILE_LOG_COUNT 2
+#define XFS_MKDIR_LOG_COUNT 3
+#define XFS_SYMLINK_LOG_COUNT 3
+#define XFS_REMOVE_LOG_COUNT 2
+#define XFS_LINK_LOG_COUNT 2
+#define XFS_RENAME_LOG_COUNT 2
+#define XFS_WRITE_LOG_COUNT 2
+#define XFS_ADDAFORK_LOG_COUNT 2
+#define XFS_ATTRINVAL_LOG_COUNT 1
+#define XFS_ATTRSET_LOG_COUNT 3
+#define XFS_ATTRRM_LOG_COUNT 3
+
+/*
+ * Original log operation counts were overestimated in the early days of
+ * reflink. These are retained here purely for minimum log size calculations
+ * and must not be used for runtime reservations.
+ */
+#define XFS_ITRUNCATE_LOG_COUNT_REFLINK 8
+#define XFS_WRITE_LOG_COUNT_REFLINK 8
+
+void xfs_trans_resv_calc(struct xfs_mount *mp, struct xfs_trans_resv *resp);
+uint xfs_allocfree_block_count(struct xfs_mount *mp, uint num_ops);
+
+unsigned int xfs_calc_itruncate_reservation_minlogsize(struct xfs_mount *mp);
+unsigned int xfs_calc_write_reservation_minlogsize(struct xfs_mount *mp);
+unsigned int xfs_calc_qm_dqalloc_reservation_minlogsize(struct xfs_mount *mp);
+
+#endif /* __XFS_TRANS_RESV_H__ */