Thomas Gleixner | 7336d0e | 2019-05-31 01:09:56 -0700 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 4 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #ifndef __DIO_DOT_H__ |
| 8 | #define __DIO_DOT_H__ |
| 9 | |
Steven Whitehouse | f2f7ba5 | 2006-09-05 10:39:21 -0400 | [diff] [blame] | 10 | #include <linux/buffer_head.h> |
| 11 | #include <linux/string.h> |
| 12 | #include "incore.h" |
| 13 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 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 | { |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 21 | BUG_ON(head > bh->b_size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 22 | memset(bh->b_data + head, 0, bh->b_size - head); |
| 23 | } |
| 24 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 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 | { |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 30 | BUG_ON(from_head < to_head); |
| 31 | memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 32 | from_bh->b_size - from_head); |
| 33 | memset(to_bh->b_data + to_bh->b_size + to_head - from_head, |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 34 | 0, from_head - to_head); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 35 | } |
| 36 | |
Steven Whitehouse | 009d851 | 2009-12-08 12:12:13 +0000 | [diff] [blame] | 37 | extern const struct address_space_operations gfs2_meta_aops; |
Steven Whitehouse | 1b2ad41 | 2014-03-31 17:48:27 +0100 | [diff] [blame] | 38 | extern const struct address_space_operations gfs2_rgrp_aops; |
Steven Whitehouse | 009d851 | 2009-12-08 12:12:13 +0000 | [diff] [blame] | 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) |
Bob Peterson | 15562c4 | 2015-03-16 11:52:05 -0500 | [diff] [blame] | 44 | return (((struct gfs2_glock *)mapping) - 1)->gl_name.ln_sbd; |
Steven Whitehouse | 1b2ad41 | 2014-03-31 17:48:27 +0100 | [diff] [blame] | 45 | else if (mapping->a_ops == &gfs2_rgrp_aops) |
| 46 | return container_of(mapping, struct gfs2_sbd, sd_aspace); |
Steven Whitehouse | 009d851 | 2009-12-08 12:12:13 +0000 | [diff] [blame] | 47 | else |
| 48 | return inode->i_sb->s_fs_info; |
| 49 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 50 | |
Steven Whitehouse | 7c0ef28 | 2013-07-03 15:13:32 +0100 | [diff] [blame] | 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, |
Andreas Gruenbacher | c8d5770 | 2015-11-11 15:00:35 -0600 | [diff] [blame] | 53 | int rahead, struct buffer_head **bhp); |
Steven Whitehouse | 7c0ef28 | 2013-07-03 15:13:32 +0100 | [diff] [blame] | 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); |
Bob Peterson | 68cd4ce | 2016-05-02 11:53:35 -0500 | [diff] [blame] | 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); |
Steven Whitehouse | 7c0ef28 | 2013-07-03 15:13:32 +0100 | [diff] [blame] | 63 | extern void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen); |
| 64 | extern int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num, |
| 65 | struct buffer_head **bhp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 66 | |
| 67 | static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip, |
| 68 | struct buffer_head **bhp) |
| 69 | { |
Bob Peterson | f2f9c81 | 2012-05-10 08:33:55 -0400 | [diff] [blame] | 70 | return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, bhp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 71 | } |
| 72 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 73 | struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 74 | |
Steven Whitehouse | ddacfaf | 2006-10-03 11:10:41 -0400 | [diff] [blame] | 75 | #define buffer_busy(bh) \ |
| 76 | ((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned))) |
Steven Whitehouse | ddacfaf | 2006-10-03 11:10:41 -0400 | [diff] [blame] | 77 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 78 | #endif /* __DIO_DOT_H__ */ |
| 79 | |