fs/gfs2/log.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   5  */
   6
   7 #ifndef __LOG_DOT_H__
   8 #define __LOG_DOT_H__
   9
  10 #include <linux/list.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/writeback.h>
  13 #include "incore.h"
  14 #include "inode.h"
  15
  16 /*
  17  * The minimum amount of log space required for a log flush is one block for
  18  * revokes and one block for the log header.  Log flushes other than
  19  * GFS2_LOG_HEAD_FLUSH_NORMAL may write one or two more log headers.
  20  */
  21 #define GFS2_LOG_FLUSH_MIN_BLOCKS 4
  22
  23 /**
  24  * gfs2_log_lock - acquire the right to mess with the log manager
  25  * @sdp: the filesystem
  26  *
  27  */
  28
  29 static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
  30 __acquires(&sdp->sd_log_lock)
  31 {
  32         spin_lock(&sdp->sd_log_lock);
  33 }
  34
  35 /**
  36  * gfs2_log_unlock - release the right to mess with the log manager
  37  * @sdp: the filesystem
  38  *
  39  */
  40
  41 static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
  42 __releases(&sdp->sd_log_lock)
  43 {
  44         spin_unlock(&sdp->sd_log_lock);
  45 }
  46
  47 static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
  48                                           unsigned int value)
  49 {
  50         if (++value == sdp->sd_jdesc->jd_blocks) {
  51                 value = 0;
  52         }
  53         sdp->sd_log_tail = value;
  54         sdp->sd_log_flush_tail = value;
  55         sdp->sd_log_head = value;
  56 }
  57
  58 static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
  59 {
  60         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  61
  62         if (gfs2_is_jdata(ip) || !gfs2_is_ordered(sdp))
  63                 return;
  64
  65         if (list_empty(&ip->i_ordered)) {
  66                 spin_lock(&sdp->sd_ordered_lock);
  67                 if (list_empty(&ip->i_ordered))
  68                         list_add(&ip->i_ordered, &sdp->sd_log_ordered);
  69                 spin_unlock(&sdp->sd_ordered_lock);
  70         }
  71 }
  72
  73 extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
  74 extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct);
  75 extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
  76 extern bool gfs2_log_is_empty(struct gfs2_sbd *sdp);
  77 extern void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes);
  78 extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
  79 extern bool gfs2_log_try_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
  80                                  unsigned int *extra_revokes);
  81 extern void gfs2_log_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
  82                              unsigned int *extra_revokes);
  83 extern void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
  84                                   u64 seq, u32 tail, u32 lblock, u32 flags,
  85                                   blk_opf_t op_flags);
  86 extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
  87                            u32 type);
  88 extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
  89 extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
  90 extern void log_flush_wait(struct gfs2_sbd *sdp);
  91
  92 extern int gfs2_logd(void *data);
  93 extern void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
  94 extern void gfs2_glock_remove_revoke(struct gfs2_glock *gl);
  95 extern void gfs2_flush_revokes(struct gfs2_sbd *sdp);
  96 extern void gfs2_ail_drain(struct gfs2_sbd *sdp);
  97
  98 #endif /* __LOG_DOT_H__ */