| | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| | 2 | /* |
| | 3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| | 4 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
| | 5 | */ |
| | 6 | |
| | 7 | #ifndef __DIO_DOT_H__ |
| | 8 | #define __DIO_DOT_H__ |
| | 9 | |
| | 10 | #include <linux/buffer_head.h> |
| | 11 | #include <linux/string.h> |
| | 12 | #include "incore.h" |
| | 13 | |
| | 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 | { |
| | 21 | BUG_ON(head > bh->b_size); |
| | 22 | memset(bh->b_data + head, 0, bh->b_size - head); |
| | 23 | } |
| | 24 | |
| | 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 | { |
| | 30 | BUG_ON(from_head < to_head); |
| | 31 | memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head, |
| | 32 | from_bh->b_size - from_head); |
| | 33 | memset(to_bh->b_data + to_bh->b_size + to_head - from_head, |
| | 34 | 0, from_head - to_head); |
| | 35 | } |
| | 36 | |
| | 37 | extern const struct address_space_operations gfs2_meta_aops; |
| | 38 | extern const struct address_space_operations gfs2_rgrp_aops; |
| | 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) |
| | 44 | return (((struct gfs2_glock *)mapping) - 1)->gl_name.ln_sbd; |
| | 45 | else if (mapping->a_ops == &gfs2_rgrp_aops) |
| | 46 | return container_of(mapping, struct gfs2_sbd, sd_aspace); |
| | 47 | else |
| | 48 | return inode->i_sb->s_fs_info; |
| | 49 | } |
| | 50 | |
| | 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, |
| | 53 | int rahead, struct buffer_head **bhp); |
| | 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); |
| | 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); |
| | 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); |
| | 66 | |
| | 67 | static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip, |
| | 68 | struct buffer_head **bhp) |
| | 69 | { |
| | 70 | return gfs2_meta_indirect_buffer(ip, 0, ip->i_no_addr, bhp); |
| | 71 | } |
| | 72 | |
| | 73 | struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen); |
| | 74 | |
| | 75 | #define buffer_busy(bh) \ |
| | 76 | ((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned))) |
| | 77 | |
| | 78 | #endif /* __DIO_DOT_H__ */ |
| | 79 | |
projects / mirror_ubuntu-hirsute-kernel.git / blame_incremental