1b3b94faaSDavid Teigland /* 2b3b94faaSDavid Teigland * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 33a8a9a10SSteven Whitehouse * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 4b3b94faaSDavid Teigland * 5b3b94faaSDavid Teigland * This copyrighted material is made available to anyone wishing to use, 6b3b94faaSDavid Teigland * modify, copy, or redistribute it subject to the terms and conditions 7e9fc2aa0SSteven Whitehouse * of the GNU General Public License version 2. 8b3b94faaSDavid Teigland */ 9b3b94faaSDavid Teigland 10b3b94faaSDavid Teigland #ifndef __LOG_DOT_H__ 11b3b94faaSDavid Teigland #define __LOG_DOT_H__ 12b3b94faaSDavid Teigland 13f2f7ba52SSteven Whitehouse #include <linux/list.h> 14f2f7ba52SSteven Whitehouse #include <linux/spinlock.h> 15f2f7ba52SSteven Whitehouse #include "incore.h" 16f2f7ba52SSteven Whitehouse 17b3b94faaSDavid Teigland /** 18b3b94faaSDavid Teigland * gfs2_log_lock - acquire the right to mess with the log manager 19b3b94faaSDavid Teigland * @sdp: the filesystem 20b3b94faaSDavid Teigland * 21b3b94faaSDavid Teigland */ 22b3b94faaSDavid Teigland 23b3b94faaSDavid Teigland static inline void gfs2_log_lock(struct gfs2_sbd *sdp) 24b3b94faaSDavid Teigland { 25b3b94faaSDavid Teigland spin_lock(&sdp->sd_log_lock); 26b3b94faaSDavid Teigland } 27b3b94faaSDavid Teigland 28b3b94faaSDavid Teigland /** 29b3b94faaSDavid Teigland * gfs2_log_unlock - release the right to mess with the log manager 30b3b94faaSDavid Teigland * @sdp: the filesystem 31b3b94faaSDavid Teigland * 32b3b94faaSDavid Teigland */ 33b3b94faaSDavid Teigland 34b3b94faaSDavid Teigland static inline void gfs2_log_unlock(struct gfs2_sbd *sdp) 35b3b94faaSDavid Teigland { 36b3b94faaSDavid Teigland spin_unlock(&sdp->sd_log_lock); 37b3b94faaSDavid Teigland } 38b3b94faaSDavid Teigland 39b3b94faaSDavid Teigland static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp, 40b3b94faaSDavid Teigland unsigned int value) 41b3b94faaSDavid Teigland { 42b3b94faaSDavid Teigland if (++value == sdp->sd_jdesc->jd_blocks) { 43b3b94faaSDavid Teigland value = 0; 44b3b94faaSDavid Teigland } 45b3b94faaSDavid Teigland sdp->sd_log_head = sdp->sd_log_tail = value; 46b3b94faaSDavid Teigland } 47b3b94faaSDavid Teigland 48b3b94faaSDavid Teigland unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct, 49b3b94faaSDavid Teigland unsigned int ssize); 50b3b94faaSDavid Teigland 51b3b94faaSDavid Teigland int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks); 52b3b94faaSDavid Teigland void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks); 5316615be1SSteven Whitehouse void gfs2_log_incr_head(struct gfs2_sbd *sdp); 54b3b94faaSDavid Teigland 55b3b94faaSDavid Teigland struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp); 56b3b94faaSDavid Teigland struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp, 57b3b94faaSDavid Teigland struct buffer_head *real); 582bcd610dSSteven Whitehouse void __gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl); 592bcd610dSSteven Whitehouse 602bcd610dSSteven Whitehouse static inline void gfs2_log_flush(struct gfs2_sbd *sbd, struct gfs2_glock *gl) 612bcd610dSSteven Whitehouse { 622bcd610dSSteven Whitehouse if (!gl || test_bit(GLF_LFLUSH, &gl->gl_flags)) 632bcd610dSSteven Whitehouse __gfs2_log_flush(sbd, gl); 642bcd610dSSteven Whitehouse } 652bcd610dSSteven Whitehouse 66b3b94faaSDavid Teigland void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans); 67f91a0d3eSSteven Whitehouse void gfs2_remove_from_ail(struct gfs2_bufdata *bd); 68b3b94faaSDavid Teigland 69b3b94faaSDavid Teigland void gfs2_log_shutdown(struct gfs2_sbd *sdp); 70a25311c8SSteven Whitehouse void gfs2_meta_syncfs(struct gfs2_sbd *sdp); 71ec69b188SSteven Whitehouse int gfs2_logd(void *data); 72b3b94faaSDavid Teigland 73b3b94faaSDavid Teigland #endif /* __LOG_DOT_H__ */ 74