VisionFive2 Linux kernel

7336d0e654f7a (Thomas Gleixner     2019-05-31 01:09:56 -0700  1) /* SPDX-License-Identifier: GPL-2.0-only */
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000  2) /*
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000  3)  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3a8a9a1034813 (Steven Whitehouse   2006-05-18 15:09:15 -0400  4)  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000  5)  */
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000  6) 
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000  7) #ifndef __DIO_DOT_H__
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000  8) #define __DIO_DOT_H__
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000  9) 
f2f7ba5237e2f (Steven Whitehouse   2006-09-05 10:39:21 -0400 10) #include <linux/buffer_head.h>
f2f7ba5237e2f (Steven Whitehouse   2006-09-05 10:39:21 -0400 11) #include <linux/string.h>
f2f7ba5237e2f (Steven Whitehouse   2006-09-05 10:39:21 -0400 12) #include "incore.h"
f2f7ba5237e2f (Steven Whitehouse   2006-09-05 10:39:21 -0400 13) 
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 14) static inline void gfs2_buffer_clear(struct buffer_head *bh)
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 15) {
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 16) 	memset(bh->b_data, 0, bh->b_size);
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 17) }
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 18) 
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 19) static inline void gfs2_buffer_clear_tail(struct buffer_head *bh, int head)
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 20) {
420b9e5e45d33 (Steven Whitehouse   2006-07-31 15:42:17 -0400 21) 	BUG_ON(head > bh->b_size);
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 22) 	memset(bh->b_data + head, 0, bh->b_size - head);
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 23) }
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 24) 
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 25) static inline void gfs2_buffer_copy_tail(struct buffer_head *to_bh,
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 26) 					 int to_head,
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 27) 					 struct buffer_head *from_bh,
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 28) 					 int from_head)
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 29) {
420b9e5e45d33 (Steven Whitehouse   2006-07-31 15:42:17 -0400 30) 	BUG_ON(from_head < to_head);
420b9e5e45d33 (Steven Whitehouse   2006-07-31 15:42:17 -0400 31) 	memcpy(to_bh->b_data + to_head, from_bh->b_data + from_head,
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 32) 	       from_bh->b_size - from_head);
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 33) 	memset(to_bh->b_data + to_bh->b_size + to_head - from_head,
420b9e5e45d33 (Steven Whitehouse   2006-07-31 15:42:17 -0400 34) 	       0, from_head - to_head);
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 35) }
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 36) 
009d851837ab2 (Steven Whitehouse   2009-12-08 12:12:13 +0000 37) extern const struct address_space_operations gfs2_meta_aops;
1b2ad41214c9b (Steven Whitehouse   2014-03-31 17:48:27 +0100 38) extern const struct address_space_operations gfs2_rgrp_aops;
009d851837ab2 (Steven Whitehouse   2009-12-08 12:12:13 +0000 39) 
009d851837ab2 (Steven Whitehouse   2009-12-08 12:12:13 +0000 40) static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping)
009d851837ab2 (Steven Whitehouse   2009-12-08 12:12:13 +0000 41) {
009d851837ab2 (Steven Whitehouse   2009-12-08 12:12:13 +0000 42) 	struct inode *inode = mapping->host;
009d851837ab2 (Steven Whitehouse   2009-12-08 12:12:13 +0000 43) 	if (mapping->a_ops == &gfs2_meta_aops)
15562c439d0a1 (Bob Peterson        2015-03-16 11:52:05 -0500 44) 		return (((struct gfs2_glock *)mapping) - 1)->gl_name.ln_sbd;
1b2ad41214c9b (Steven Whitehouse   2014-03-31 17:48:27 +0100 45) 	else if (mapping->a_ops == &gfs2_rgrp_aops)
1b2ad41214c9b (Steven Whitehouse   2014-03-31 17:48:27 +0100 46) 		return container_of(mapping, struct gfs2_sbd, sd_aspace);
009d851837ab2 (Steven Whitehouse   2009-12-08 12:12:13 +0000 47) 	else
009d851837ab2 (Steven Whitehouse   2009-12-08 12:12:13 +0000 48) 		return inode->i_sb->s_fs_info;
009d851837ab2 (Steven Whitehouse   2009-12-08 12:12:13 +0000 49) }
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 50) 
7c0ef28a2c9a7 (Steven Whitehouse   2013-07-03 15:13:32 +0100 51) extern struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno);
7c0ef28a2c9a7 (Steven Whitehouse   2013-07-03 15:13:32 +0100 52) extern int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
c8d577038449a (Andreas Gruenbacher 2015-11-11 15:00:35 -0600 53) 			  int rahead, struct buffer_head **bhp);
7c0ef28a2c9a7 (Steven Whitehouse   2013-07-03 15:13:32 +0100 54) extern int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh);
7c0ef28a2c9a7 (Steven Whitehouse   2013-07-03 15:13:32 +0100 55) extern struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno,
7c0ef28a2c9a7 (Steven Whitehouse   2013-07-03 15:13:32 +0100 56) 				       int create);
68cd4ce2caf22 (Bob Peterson        2016-05-02 11:53:35 -0500 57) enum {
68cd4ce2caf22 (Bob Peterson        2016-05-02 11:53:35 -0500 58) 	REMOVE_JDATA = 0,
68cd4ce2caf22 (Bob Peterson        2016-05-02 11:53:35 -0500 59) 	REMOVE_META = 1,
68cd4ce2caf22 (Bob Peterson        2016-05-02 11:53:35 -0500 60) };
68cd4ce2caf22 (Bob Peterson        2016-05-02 11:53:35 -0500 61) 
68cd4ce2caf22 (Bob Peterson        2016-05-02 11:53:35 -0500 62) extern void gfs2_remove_from_journal(struct buffer_head *bh, int meta);
68942870c66a7 (Bob Peterson        2020-07-22 10:27:50 -0500 63) extern void gfs2_journal_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen);
6d8da302aedf9 (Andreas Gruenbacher 2021-03-25 18:48:49 +0100 64) extern int gfs2_meta_buffer(struct gfs2_inode *ip, u32 mtype, u64 num,
6d8da302aedf9 (Andreas Gruenbacher 2021-03-25 18:48:49 +0100 65) 			    struct buffer_head **bhp);
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 66) 
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 67) static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 68) 					 struct buffer_head **bhp)
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 69) {
6d8da302aedf9 (Andreas Gruenbacher 2021-03-25 18:48:49 +0100 70) 	return gfs2_meta_buffer(ip, GFS2_METATYPE_DI, ip->i_no_addr, bhp);
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 71) }
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 72) 
7276b3b0c7710 (Steven Whitehouse   2006-09-21 17:05:23 -0400 73) struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen);
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 74) 
ddacfaf76dd62 (Steven Whitehouse   2006-10-03 11:10:41 -0400 75) #define buffer_busy(bh) \
ddacfaf76dd62 (Steven Whitehouse   2006-10-03 11:10:41 -0400 76) ((bh)->b_state & ((1ul << BH_Dirty) | (1ul << BH_Lock) | (1ul << BH_Pinned)))
ddacfaf76dd62 (Steven Whitehouse   2006-10-03 11:10:41 -0400 77) 
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 78) #endif /* __DIO_DOT_H__ */
b3b94faa5fe59 (David Teigland      2006-01-16 16:50:04 +0000 79)