| 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| 3 | * Copyright (C) 2004-2008 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 __LOPS_DOT_H__ |
| 11 | #define __LOPS_DOT_H__ |
| 12 | |
| 13 | #include <linux/list.h> |
| 14 | #include "incore.h" |
| 15 | |
| 16 | #define BUF_OFFSET \ |
| 17 | ((sizeof(struct gfs2_log_descriptor) + sizeof(__be64) - 1) & \ |
| 18 | ~(sizeof(__be64) - 1)) |
| 19 | #define DATABUF_OFFSET \ |
| 20 | ((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \ |
| 21 | ~(2 * sizeof(__be64) - 1)) |
| 22 | |
| 23 | extern const struct gfs2_log_operations gfs2_glock_lops; |
| 24 | extern const struct gfs2_log_operations gfs2_buf_lops; |
| 25 | extern const struct gfs2_log_operations gfs2_revoke_lops; |
| 26 | extern const struct gfs2_log_operations gfs2_databuf_lops; |
| 27 | |
| 28 | extern const struct gfs2_log_operations *gfs2_log_ops[]; |
| 29 | extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page); |
| 30 | extern void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw); |
| 31 | extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh); |
| 32 | |
| 33 | static inline unsigned int buf_limit(struct gfs2_sbd *sdp) |
| 34 | { |
| 35 | unsigned int limit; |
| 36 | |
| 37 | limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64); |
| 38 | return limit; |
| 39 | } |
| 40 | |
| 41 | static inline unsigned int databuf_limit(struct gfs2_sbd *sdp) |
| 42 | { |
| 43 | unsigned int limit; |
| 44 | |
| 45 | limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64)); |
| 46 | return limit; |
| 47 | } |
| 48 | |
| 49 | static inline void lops_before_commit(struct gfs2_sbd *sdp, |
| 50 | struct gfs2_trans *tr) |
| 51 | { |
| 52 | int x; |
| 53 | for (x = 0; gfs2_log_ops[x]; x++) |
| 54 | if (gfs2_log_ops[x]->lo_before_commit) |
| 55 | gfs2_log_ops[x]->lo_before_commit(sdp, tr); |
| 56 | } |
| 57 | |
| 58 | static inline void lops_after_commit(struct gfs2_sbd *sdp, |
| 59 | struct gfs2_trans *tr) |
| 60 | { |
| 61 | int x; |
| 62 | for (x = 0; gfs2_log_ops[x]; x++) |
| 63 | if (gfs2_log_ops[x]->lo_after_commit) |
| 64 | gfs2_log_ops[x]->lo_after_commit(sdp, tr); |
| 65 | } |
| 66 | |
| 67 | static inline void lops_before_scan(struct gfs2_jdesc *jd, |
| 68 | struct gfs2_log_header_host *head, |
| 69 | unsigned int pass) |
| 70 | { |
| 71 | int x; |
| 72 | for (x = 0; gfs2_log_ops[x]; x++) |
| 73 | if (gfs2_log_ops[x]->lo_before_scan) |
| 74 | gfs2_log_ops[x]->lo_before_scan(jd, head, pass); |
| 75 | } |
| 76 | |
| 77 | static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start, |
| 78 | struct gfs2_log_descriptor *ld, |
| 79 | __be64 *ptr, |
| 80 | unsigned int pass) |
| 81 | { |
| 82 | int x, error; |
| 83 | for (x = 0; gfs2_log_ops[x]; x++) |
| 84 | if (gfs2_log_ops[x]->lo_scan_elements) { |
| 85 | error = gfs2_log_ops[x]->lo_scan_elements(jd, start, |
| 86 | ld, ptr, pass); |
| 87 | if (error) |
| 88 | return error; |
| 89 | } |
| 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | static inline void lops_after_scan(struct gfs2_jdesc *jd, int error, |
| 95 | unsigned int pass) |
| 96 | { |
| 97 | int x; |
| 98 | for (x = 0; gfs2_log_ops[x]; x++) |
| 99 | if (gfs2_log_ops[x]->lo_before_scan) |
| 100 | gfs2_log_ops[x]->lo_after_scan(jd, error, pass); |
| 101 | } |
| 102 | |
| 103 | #endif /* __LOPS_DOT_H__ */ |
| 104 | |