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 int 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 97 #endif /* __LOG_DOT_H__ */ 98