1 /*
2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
4  *
5  * This copyrighted material is made available to anyone wishing to use,
6  * modify, copy, or redistribute it subject to the terms and conditions
7  * of the GNU General Public License version 2.
8  */
9 
10 #ifndef __LOG_DOT_H__
11 #define __LOG_DOT_H__
12 
13 #include <linux/list.h>
14 #include <linux/spinlock.h>
15 #include <linux/writeback.h>
16 #include "incore.h"
17 #include "inode.h"
18 
19 /**
20  * gfs2_log_lock - acquire the right to mess with the log manager
21  * @sdp: the filesystem
22  *
23  */
24 
gfs2_log_lock(struct gfs2_sbd * sdp)25 static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
26 __acquires(&sdp->sd_log_lock)
27 {
28 	spin_lock(&sdp->sd_log_lock);
29 }
30 
31 /**
32  * gfs2_log_unlock - release the right to mess with the log manager
33  * @sdp: the filesystem
34  *
35  */
36 
gfs2_log_unlock(struct gfs2_sbd * sdp)37 static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
38 __releases(&sdp->sd_log_lock)
39 {
40 	spin_unlock(&sdp->sd_log_lock);
41 }
42 
gfs2_log_pointers_init(struct gfs2_sbd * sdp,unsigned int value)43 static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
44 					  unsigned int value)
45 {
46 	if (++value == sdp->sd_jdesc->jd_blocks) {
47 		value = 0;
48 	}
49 	sdp->sd_log_head = sdp->sd_log_tail = value;
50 }
51 
gfs2_ordered_add_inode(struct gfs2_inode * ip)52 static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
53 {
54 	struct gfs2_sbd *sdp;
55 
56 	if (!gfs2_is_ordered(ip))
57 		return;
58 
59 	sdp = GFS2_SB(&ip->i_inode);
60 	if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
61 		spin_lock(&sdp->sd_ordered_lock);
62 		if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
63 			list_add(&ip->i_ordered, &sdp->sd_log_le_ordered);
64 		spin_unlock(&sdp->sd_ordered_lock);
65 	}
66 }
67 extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
68 extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
69 			    unsigned int ssize);
70 
71 extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
72 extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
73 extern void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
74 				  u64 seq, u32 tail, u32 flags, int op_flags);
75 extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
76 			   u32 type);
77 extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
78 extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
79 
80 extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
81 extern int gfs2_logd(void *data);
82 extern void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
83 extern void gfs2_glock_remove_revoke(struct gfs2_glock *gl);
84 extern void gfs2_write_revokes(struct gfs2_sbd *sdp);
85 
86 #endif /* __LOG_DOT_H__ */
87