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 "incore.h" 16 17 /** 18 * gfs2_log_lock - acquire the right to mess with the log manager 19 * @sdp: the filesystem 20 * 21 */ 22 23 static inline void gfs2_log_lock(struct gfs2_sbd *sdp) 24 __acquires(&sdp->sd_log_lock) 25 { 26 spin_lock(&sdp->sd_log_lock); 27 } 28 29 /** 30 * gfs2_log_unlock - release the right to mess with the log manager 31 * @sdp: the filesystem 32 * 33 */ 34 35 static inline void gfs2_log_unlock(struct gfs2_sbd *sdp) 36 __releases(&sdp->sd_log_lock) 37 { 38 spin_unlock(&sdp->sd_log_lock); 39 } 40 41 static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp, 42 unsigned int value) 43 { 44 if (++value == sdp->sd_jdesc->jd_blocks) { 45 value = 0; 46 } 47 sdp->sd_log_head = sdp->sd_log_tail = value; 48 } 49 50 unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct, 51 unsigned int ssize); 52 53 int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks); 54 void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks); 55 void gfs2_log_incr_head(struct gfs2_sbd *sdp); 56 57 struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp); 58 struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp, 59 struct buffer_head *real); 60 void __gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl); 61 62 static inline void gfs2_log_flush(struct gfs2_sbd *sbd, struct gfs2_glock *gl) 63 { 64 if (!gl || test_bit(GLF_LFLUSH, &gl->gl_flags)) 65 __gfs2_log_flush(sbd, gl); 66 } 67 68 void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans); 69 void gfs2_remove_from_ail(struct gfs2_bufdata *bd); 70 71 void gfs2_log_shutdown(struct gfs2_sbd *sdp); 72 void gfs2_meta_syncfs(struct gfs2_sbd *sdp); 73 int gfs2_logd(void *data); 74 75 #endif /* __LOG_DOT_H__ */ 76