1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2005 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 v.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 memset(bh->b_data + head, 0, bh->b_size - head); 21 } 22 23 static inline void gfs2_buffer_clear_ends(struct buffer_head *bh, int offset, 24 int amount, int journaled) 25 { 26 int z_off1 = (journaled) ? sizeof(struct gfs2_meta_header) : 0; 27 int z_len1 = offset - z_off1; 28 int z_off2 = offset + amount; 29 int z_len2 = (bh)->b_size - z_off2; 30 31 if (z_len1) 32 memset(bh->b_data + z_off1, 0, z_len1); 33 34 if (z_len2) 35 memset(bh->b_data + z_off2, 0, z_len2); 36 } 37 38 static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh, 39 int to_head, 40 struct buffer_head *from_bh, 41 int from_head) 42 { 43 memcpy(to_bh->b_data + to_head, 44 from_bh->b_data + from_head, 45 from_bh->b_size - from_head); 46 memset(to_bh->b_data + to_bh->b_size + to_head - from_head, 47 0, 48 from_head - to_head); 49 } 50 51 struct inode *gfs2_aspace_get(struct gfs2_sbd *sdp); 52 void gfs2_aspace_put(struct inode *aspace); 53 54 void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai); 55 int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai, int flags); 56 void gfs2_ail2_empty_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai); 57 void gfs2_ail_empty_gl(struct gfs2_glock *gl); 58 59 void gfs2_meta_inval(struct gfs2_glock *gl); 60 void gfs2_meta_sync(struct gfs2_glock *gl, int flags); 61 62 struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, uint64_t blkno); 63 int gfs2_meta_read(struct gfs2_glock *gl, uint64_t blkno, 64 int flags, struct buffer_head **bhp); 65 int gfs2_meta_reread(struct gfs2_sbd *sdp, struct buffer_head *bh, int flags); 66 67 void gfs2_attach_bufdata(struct gfs2_glock *gl, struct buffer_head *bh, int meta); 68 void gfs2_meta_pin(struct gfs2_sbd *sdp, struct buffer_head *bh); 69 void gfs2_meta_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh, 70 struct gfs2_ail *ai); 71 72 void gfs2_meta_wipe(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen); 73 74 void gfs2_meta_cache_flush(struct gfs2_inode *ip); 75 int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, uint64_t num, 76 int new, struct buffer_head **bhp); 77 78 static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip, 79 struct buffer_head **bhp) 80 { 81 return gfs2_meta_indirect_buffer(ip, 0, ip->i_num.no_addr, 0, bhp); 82 } 83 84 void gfs2_meta_ra(struct gfs2_glock *gl, uint64_t dblock, uint32_t extlen); 85 void gfs2_meta_syncfs(struct gfs2_sbd *sdp); 86 87 #endif /* __DIO_DOT_H__ */ 88 89