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 void gfs2_ordered_del_inode(struct gfs2_inode *ip);
74 unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct);
75 void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
76 bool gfs2_log_is_empty(struct gfs2_sbd *sdp);
77 void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes);
78 void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
79 bool gfs2_log_try_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
80 unsigned int *extra_revokes);
81 void gfs2_log_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
82 unsigned int *extra_revokes);
83 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 void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
87 u32 type);
88 void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
89 void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
90 void log_flush_wait(struct gfs2_sbd *sdp);
91
92 int gfs2_logd(void *data);
93 void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
94 void gfs2_glock_remove_revoke(struct gfs2_glock *gl);
95 void gfs2_flush_revokes(struct gfs2_sbd *sdp);
96 void gfs2_ail_drain(struct gfs2_sbd *sdp);
97
98 #endif /* __LOG_DOT_H__ */
99
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