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GFS2: Add a bug trap in allocation code
[linux-2.6-block.git] / fs / gfs2 / inode.h
CommitLineData
b3b94faa
DT		 1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10 3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa
DT		 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
e9fc2aa0 7 * of the GNU General Public License version 2.
b3b94faa
DT		 8 */
9
10#ifndef __INODE_DOT_H__
11#define __INODE_DOT_H__
12
b2760583 13#include <linux/fs.h>
b1e71b06
SW		 14#include <linux/buffer_head.h>
15#include <linux/mm.h>
77658aad
SW		 16#include "util.h"
17
b1e71b06
SW		 18extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
19extern int gfs2_internal_read(struct gfs2_inode *ip,
20 struct file_ra_state *ra_state,
21 char *buf, loff_t *pos, unsigned size);
22extern void gfs2_set_aops(struct inode *inode);
23
dbb7cae2 24static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
b3b94faa 25{
ecc30c79 26 return !ip->i_height;
b3b94faa
DT		 27}
28
dbb7cae2 29static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
b3b94faa 30{
383f01fb 31 return ip->i_diskflags & GFS2_DIF_JDATA;
b3b94faa
DT		 32}
33
bf36a713
SW		 34static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
35{
36 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
37 return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
38}
39
5561093e
SW		 40static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
41{
42 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
43 return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
44}
45
dbb7cae2 46static inline int gfs2_is_dir(const struct gfs2_inode *ip)
18ec7d5c 47{
b60623c2 48 return S_ISDIR(ip->i_inode.i_mode);
18ec7d5c
SW		 49}
50
77658aad
SW		 51static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
52{
53 inode->i_blocks = blocks <<
54 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
55}
56
57static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
9e2dbdac 58{
77658aad 59 return inode->i_blocks >>
9e2dbdac
SW		 60 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
61}
62
77658aad
SW		 63static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
64{
65 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
66 change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
67 inode->i_blocks += change;
68}
69
dbb7cae2
SW		 70static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
71 u64 no_formal_ino)
72{
73 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
74}
75
bb8d8a6f
SW		 76static inline void gfs2_inum_out(const struct gfs2_inode *ip,
77 struct gfs2_dirent *dent)
78{
79 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
80 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
81}
82
a2e0f799
SW		 83static inline int gfs2_check_internal_file_size(struct inode *inode,
84 u64 minsize, u64 maxsize)
85{
86 u64 size = i_size_read(inode);
87 if (size < minsize || size > maxsize)
88 goto err;
89 if (size & ((1 << inode->i_blkbits) - 1))
90 goto err;
91 return 0;
92err:
93 gfs2_consist_inode(GFS2_I(inode));
94 return -EIO;
95}
bb8d8a6f 96
b1e71b06
SW		 97extern void gfs2_set_iop(struct inode *inode);
98extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
1a0eae88 99 u64 no_addr, u64 no_formal_ino);
ed4878e8 100extern void gfs2_process_unlinked_inode(struct super_block *sb, u64 no_addr);
b1e71b06
SW		 101extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
102
103extern int gfs2_inode_refresh(struct gfs2_inode *ip);
104
105extern int gfs2_dinode_dealloc(struct gfs2_inode *inode);
106extern int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
107extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
108 int is_root);
109extern struct inode *gfs2_createi(struct gfs2_holder *ghs,
110 const struct qstr *name,
111 unsigned int mode, dev_t dev);
b1e71b06 112extern int gfs2_permission(struct inode *inode, int mask);
b1e71b06
SW		 113extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
114extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
115extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
116extern void gfs2_dinode_print(const struct gfs2_inode *ip);
b3b94faa 117
b2760583
SW		 118extern const struct inode_operations gfs2_file_iops;
119extern const struct inode_operations gfs2_dir_iops;
120extern const struct inode_operations gfs2_symlink_iops;
10d21988
CH		 121extern const struct file_operations gfs2_file_fops_nolock;
122extern const struct file_operations gfs2_dir_fops_nolock;
b2760583
SW		 123
124extern void gfs2_set_inode_flags(struct inode *inode);
f057f6cd
SW		 125
126#ifdef CONFIG_GFS2_FS_LOCKING_DLM
10d21988
CH		 127extern const struct file_operations gfs2_file_fops;
128extern const struct file_operations gfs2_dir_fops;
129
f057f6cd
SW		 130static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
131{
132 return sdp->sd_args.ar_localflocks;
133}
134#else /* Single node only */
10d21988
CH		 135#define gfs2_file_fops gfs2_file_fops_nolock
136#define gfs2_dir_fops gfs2_dir_fops_nolock
137
f057f6cd
SW		 138static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
139{
140 return 1;
141}
142#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
b2760583 143
b3b94faa
DT		 144#endif /* __INODE_DOT_H__ */
145
Linux 6.x block layer and io_uring tree(s)