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 __DIO_DOT_H__ 11 #define __DIO_DOT_H__ 12 13 static inline void gfs2_buffer_clear(struct buffer_head *bh) 14 { 15 memset(bh->b_data, 0, bh->b_size); 16 } 17 18 static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head) 19 { 20 BUG_ON(head > bh->b_size); 21 memset(bh->b_data + head, 0, bh->b_size - head); 22 } 23 24 static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh, 25 int to_head, 26 struct buffer_head *from_bh, 27 int from_head) 28 { 29 BUG_ON(from_head < to_head); 30 memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head, 31 from_bh->b_size - from_head); 32 memset(to_bh->b_data + to_bh->b_size + to_head - from_head, 33 0, from_head - to_head); 34 } 35 36 struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp); 37 void gfs2_aspace_put(struct inode *aspace); 38 39 void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai); 40 int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai, int flags); 41 void gfs2_ail2_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai); 42 void gfs2_ail_empty_gl(struct gfs2_glock *gl); 43 44 void gfs2_meta_inval(struct gfs2_glock *gl); 45 void gfs2_meta_sync(struct gfs2_glock *gl, int flags); 46 47 struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, uint64_t blkno); 48 int gfs2_meta_read(struct gfs2_glock *gl, uint64_t blkno, 49 int flags, struct buffer_head **bhp); 50 int gfs2_meta_reread(struct gfs2_sbd *sdp, struct buffer_head *bh, int flags); 51 52 void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh, 53 int meta); 54 void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh); 55 void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, 56 struct gfs2_ail *ai); 57 58 void gfs2_meta_wipe(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen); 59 60 void gfs2_meta_cache_flush(struct gfs2_inode *ip); 61 int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, uint64_t num, 62 int new, struct buffer_head **bhp); 63 64 static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip, 65 struct buffer_head **bhp) 66 { 67 return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp); 68 } 69 70 void gfs2_meta_ra(struct gfs2_glock *gl, uint64_t dblock, uint32_t extlen); 71 void gfs2_meta_syncfs(struct gfs2_sbd *sdp); 72 73 #endif /* __DIO_DOT_H__ */ 74 75