298 lines
9.7 KiB
C
298 lines
9.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_TRANS_H__
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#define __XFS_TRANS_H__
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/* kernel only transaction subsystem defines */
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struct xlog;
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struct xfs_buf;
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struct xfs_buftarg;
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struct xfs_efd_log_item;
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struct xfs_efi_log_item;
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struct xfs_inode;
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struct xfs_item_ops;
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struct xfs_log_iovec;
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struct xfs_mount;
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struct xfs_trans;
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struct xfs_trans_res;
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struct xfs_dquot_acct;
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struct xfs_rud_log_item;
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struct xfs_rui_log_item;
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struct xfs_btree_cur;
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struct xfs_cui_log_item;
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struct xfs_cud_log_item;
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struct xfs_bui_log_item;
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struct xfs_bud_log_item;
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struct xfs_log_item {
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struct list_head li_ail; /* AIL pointers */
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struct list_head li_trans; /* transaction list */
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xfs_lsn_t li_lsn; /* last on-disk lsn */
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struct xlog *li_log;
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struct xfs_ail *li_ailp; /* ptr to AIL */
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uint li_type; /* item type */
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unsigned long li_flags; /* misc flags */
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struct xfs_buf *li_buf; /* real buffer pointer */
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struct list_head li_bio_list; /* buffer item list */
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const struct xfs_item_ops *li_ops; /* function list */
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/* delayed logging */
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struct list_head li_cil; /* CIL pointers */
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struct xfs_log_vec *li_lv; /* active log vector */
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struct xfs_log_vec *li_lv_shadow; /* standby vector */
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xfs_csn_t li_seq; /* CIL commit seq */
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};
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/*
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* li_flags use the (set/test/clear)_bit atomic interfaces because updates can
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* race with each other and we don't want to have to use the AIL lock to
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* serialise all updates.
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*/
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#define XFS_LI_IN_AIL 0
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#define XFS_LI_ABORTED 1
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#define XFS_LI_FAILED 2
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#define XFS_LI_DIRTY 3 /* log item dirty in transaction */
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#define XFS_LI_FLAGS \
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{ (1 << XFS_LI_IN_AIL), "IN_AIL" }, \
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{ (1 << XFS_LI_ABORTED), "ABORTED" }, \
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{ (1 << XFS_LI_FAILED), "FAILED" }, \
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{ (1 << XFS_LI_DIRTY), "DIRTY" }
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struct xfs_item_ops {
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unsigned flags;
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void (*iop_size)(struct xfs_log_item *, int *, int *);
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void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *);
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void (*iop_pin)(struct xfs_log_item *);
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void (*iop_unpin)(struct xfs_log_item *, int remove);
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uint (*iop_push)(struct xfs_log_item *, struct list_head *);
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void (*iop_committing)(struct xfs_log_item *lip, xfs_csn_t seq);
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void (*iop_release)(struct xfs_log_item *);
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xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);
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int (*iop_recover)(struct xfs_log_item *lip,
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struct list_head *capture_list);
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bool (*iop_match)(struct xfs_log_item *item, uint64_t id);
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struct xfs_log_item *(*iop_relog)(struct xfs_log_item *intent,
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struct xfs_trans *tp);
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};
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/* Is this log item a deferred action intent? */
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static inline bool
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xlog_item_is_intent(struct xfs_log_item *lip)
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{
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return lip->li_ops->iop_recover != NULL &&
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lip->li_ops->iop_match != NULL;
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}
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/* Is this a log intent-done item? */
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static inline bool
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xlog_item_is_intent_done(struct xfs_log_item *lip)
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{
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return lip->li_ops->iop_unpin == NULL &&
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lip->li_ops->iop_push == NULL;
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}
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/*
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* Release the log item as soon as committed. This is for items just logging
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* intents that never need to be written back in place.
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*/
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#define XFS_ITEM_RELEASE_WHEN_COMMITTED (1 << 0)
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void xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
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int type, const struct xfs_item_ops *ops);
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/*
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* Return values for the iop_push() routines.
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*/
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#define XFS_ITEM_SUCCESS 0
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#define XFS_ITEM_PINNED 1
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#define XFS_ITEM_LOCKED 2
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#define XFS_ITEM_FLUSHING 3
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/*
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* This is the structure maintained for every active transaction.
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*/
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typedef struct xfs_trans {
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unsigned int t_magic; /* magic number */
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unsigned int t_log_res; /* amt of log space resvd */
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unsigned int t_log_count; /* count for perm log res */
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unsigned int t_blk_res; /* # of blocks resvd */
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unsigned int t_blk_res_used; /* # of resvd blocks used */
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unsigned int t_rtx_res; /* # of rt extents resvd */
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unsigned int t_rtx_res_used; /* # of resvd rt extents used */
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unsigned int t_flags; /* misc flags */
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xfs_fsblock_t t_firstblock; /* first block allocated */
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struct xlog_ticket *t_ticket; /* log mgr ticket */
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struct xfs_mount *t_mountp; /* ptr to fs mount struct */
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struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */
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int64_t t_icount_delta; /* superblock icount change */
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int64_t t_ifree_delta; /* superblock ifree change */
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int64_t t_fdblocks_delta; /* superblock fdblocks chg */
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int64_t t_res_fdblocks_delta; /* on-disk only chg */
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int64_t t_frextents_delta;/* superblock freextents chg*/
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int64_t t_res_frextents_delta; /* on-disk only chg */
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int64_t t_dblocks_delta;/* superblock dblocks change */
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int64_t t_agcount_delta;/* superblock agcount change */
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int64_t t_imaxpct_delta;/* superblock imaxpct change */
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int64_t t_rextsize_delta;/* superblock rextsize chg */
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int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */
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int64_t t_rblocks_delta;/* superblock rblocks change */
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int64_t t_rextents_delta;/* superblocks rextents chg */
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int64_t t_rextslog_delta;/* superblocks rextslog chg */
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struct list_head t_items; /* log item descriptors */
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struct list_head t_busy; /* list of busy extents */
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struct list_head t_dfops; /* deferred operations */
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unsigned long t_pflags; /* saved process flags state */
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} xfs_trans_t;
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/*
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* XFS transaction mechanism exported interfaces that are
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* actually macros.
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*/
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#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
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/*
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* XFS transaction mechanism exported interfaces.
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*/
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int xfs_trans_alloc(struct xfs_mount *mp, struct xfs_trans_res *resp,
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uint blocks, uint rtextents, uint flags,
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struct xfs_trans **tpp);
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int xfs_trans_alloc_empty(struct xfs_mount *mp,
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struct xfs_trans **tpp);
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void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
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int xfs_trans_get_buf_map(struct xfs_trans *tp, struct xfs_buftarg *target,
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struct xfs_buf_map *map, int nmaps, xfs_buf_flags_t flags,
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struct xfs_buf **bpp);
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static inline int
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xfs_trans_get_buf(
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struct xfs_trans *tp,
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struct xfs_buftarg *target,
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xfs_daddr_t blkno,
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int numblks,
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xfs_buf_flags_t flags,
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struct xfs_buf **bpp)
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{
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DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
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return xfs_trans_get_buf_map(tp, target, &map, 1, flags, bpp);
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}
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int xfs_trans_read_buf_map(struct xfs_mount *mp,
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struct xfs_trans *tp,
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struct xfs_buftarg *target,
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struct xfs_buf_map *map, int nmaps,
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xfs_buf_flags_t flags,
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struct xfs_buf **bpp,
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const struct xfs_buf_ops *ops);
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static inline int
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xfs_trans_read_buf(
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struct xfs_mount *mp,
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struct xfs_trans *tp,
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struct xfs_buftarg *target,
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xfs_daddr_t blkno,
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int numblks,
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xfs_buf_flags_t flags,
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struct xfs_buf **bpp,
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const struct xfs_buf_ops *ops)
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{
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DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
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return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
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flags, bpp, ops);
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}
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struct xfs_buf *xfs_trans_getsb(struct xfs_trans *);
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void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
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void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
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void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
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void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
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void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
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void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
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void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
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bool xfs_trans_ordered_buf(xfs_trans_t *, struct xfs_buf *);
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void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
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void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
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void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
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void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
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void xfs_trans_log_buf(struct xfs_trans *, struct xfs_buf *, uint,
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uint);
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void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
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bool xfs_trans_buf_is_dirty(struct xfs_buf *bp);
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void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
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int xfs_trans_commit(struct xfs_trans *);
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int xfs_trans_roll(struct xfs_trans **);
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int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
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void xfs_trans_cancel(xfs_trans_t *);
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int xfs_trans_ail_init(struct xfs_mount *);
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void xfs_trans_ail_destroy(struct xfs_mount *);
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void xfs_trans_buf_set_type(struct xfs_trans *, struct xfs_buf *,
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enum xfs_blft);
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void xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
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struct xfs_buf *src_bp);
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extern struct kmem_cache *xfs_trans_cache;
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static inline struct xfs_log_item *
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xfs_trans_item_relog(
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struct xfs_log_item *lip,
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struct xfs_trans *tp)
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{
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return lip->li_ops->iop_relog(lip, tp);
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}
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struct xfs_dquot;
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int xfs_trans_alloc_inode(struct xfs_inode *ip, struct xfs_trans_res *resv,
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unsigned int dblocks, unsigned int rblocks, bool force,
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struct xfs_trans **tpp);
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int xfs_trans_alloc_icreate(struct xfs_mount *mp, struct xfs_trans_res *resv,
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struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
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struct xfs_dquot *pdqp, unsigned int dblocks,
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struct xfs_trans **tpp);
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int xfs_trans_alloc_ichange(struct xfs_inode *ip, struct xfs_dquot *udqp,
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struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, bool force,
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struct xfs_trans **tpp);
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int xfs_trans_alloc_dir(struct xfs_inode *dp, struct xfs_trans_res *resv,
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struct xfs_inode *ip, unsigned int *dblocks,
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struct xfs_trans **tpp, int *nospace_error);
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static inline void
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xfs_trans_set_context(
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struct xfs_trans *tp)
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{
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ASSERT(current->journal_info == NULL);
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tp->t_pflags = memalloc_nofs_save();
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current->journal_info = tp;
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}
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static inline void
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xfs_trans_clear_context(
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struct xfs_trans *tp)
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{
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if (current->journal_info == tp) {
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memalloc_nofs_restore(tp->t_pflags);
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current->journal_info = NULL;
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}
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}
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static inline void
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xfs_trans_switch_context(
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struct xfs_trans *old_tp,
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struct xfs_trans *new_tp)
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{
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ASSERT(current->journal_info == old_tp);
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new_tp->t_pflags = old_tp->t_pflags;
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old_tp->t_pflags = 0;
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current->journal_info = new_tp;
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}
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#endif /* __XFS_TRANS_H__ */
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