projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 7336d0e6 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| b3b94faa DT |
2 | /* |
| 3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
| 3a8a9a10 | 4 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
| b3b94faa DT |
5 | */ |
| 6 | ||
| 7 | #ifndef __DIO_DOT_H__ | |
| 8 | #define __DIO_DOT_H__ | |
| 9 | ||
| f2f7ba52 SW |
10 | #include <linux/buffer_head.h> |
| 11 | #include <linux/string.h> | |
| 12 | #include "incore.h" | |
| 13 | ||
| b3b94faa DT |
14 | static inline void gfs2_buffer_clear(struct buffer_head *bh) |
| 15 | { | |
| 16 | memset(bh->b_data, 0, bh->b_size); | |
| 17 | } | |
| 18 | ||
| 19 | static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head) | |
| 20 | { | |
| 420b9e5e | 21 | BUG_ON(head > bh->b_size); |
| b3b94faa DT |
22 | memset(bh->b_data + head, 0, bh->b_size - head); |
| 23 | } | |
| 24 | ||
| b3b94faa DT |
25 | static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh, |
| 26 | int to_head, | |
| 27 | struct buffer_head *from_bh, | |
| 28 | int from_head) | |
| 29 | { | |
| 420b9e5e SW |
30 | BUG_ON(from_head < to_head); |
| 31 | memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head, | |
| b3b94faa DT |
32 | from_bh->b_size - from_head); |
| 33 | memset(to_bh->b_data + to_bh->b_size + to_head - from_head, | |
| 420b9e5e | 34 | 0, from_head - to_head); |
| b3b94faa DT |
35 | } |
| 36 | ||
| 009d8518 | 37 | extern const struct address_space_operations gfs2_meta_aops; |
| 1b2ad412 | 38 | extern const struct address_space_operations gfs2_rgrp_aops; |
| 009d8518 SW |
39 | |
| 40 | static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping) | |
| 41 | { | |
| 42 | struct inode *inode = mapping->host; | |
| 43 | if (mapping->a_ops == &gfs2_meta_aops) | |
| 15562c43 | 44 | return (((struct gfs2_glock *)mapping) - 1)->gl_name.ln_sbd; |
| 1b2ad412 SW |
45 | else if (mapping->a_ops == &gfs2_rgrp_aops) |
| 46 | return container_of(mapping, struct gfs2_sbd, sd_aspace); | |
| 009d8518 SW |
47 | else |
| 48 | return inode->i_sb->s_fs_info; | |
| 49 | } | |
| b3b94faa | 50 | |
| 7c0ef28a SW |
51 | extern struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno); |
| 52 | extern int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags, | |
| c8d57703 | 53 | int rahead, struct buffer_head **bhp); |
| 7c0ef28a SW |
54 | extern int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh); |
| 55 | extern struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, | |
| 56 | int create); | |
| 68cd4ce2 BP |
57 | enum { |
| 58 | REMOVE_JDATA = 0, | |
| 59 | REMOVE_META = 1, | |
| 60 | }; | |
| 61 | ||
| 62 | extern void gfs2_remove_from_journal(struct buffer_head *bh, int meta); | |
| 68942870 | 63 | extern void gfs2_journal_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen); |
| 7c0ef28a SW |
64 | extern int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num, |
| 65 | struct buffer_head **bhp); | |
| b3b94faa DT |
66 | |
| 67 | static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip, | |
| 68 | struct buffer_head **bhp) | |
| 69 | { | |
| f2f9c812 | 70 | return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, bhp); |
| b3b94faa DT |
71 | } |
| 72 | ||
| 7276b3b0 | 73 | struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen); |
| b3b94faa | 74 | |
| ddacfaf7 SW |
75 | #define buffer_busy(bh) \ |
| 76 | ((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned))) | |
| ddacfaf7 | 77 | |
| b3b94faa DT |
78 | #endif /* __DIO_DOT_H__ */ |
| 79 |