TrustedFirmware Git Browser
Code Review Sign In
review.trustedfirmware.org / hafnium / third_party / linux.git / b4b6d4a02fa8aa8187d426b508fb7f3b69df0dcc / . / fs / gfs2 / inode.h
blob: b5b6341a4f5c301cfa6e91e61cac216fa02051c3 [file] [log] [blame]
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame^]1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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
7 * of the GNU General Public License version 2.
8 */
9
10#ifndef __INODE_DOT_H__
11#define __INODE_DOT_H__
12
13#include <linux/fs.h>
14#include <linux/buffer_head.h>
15#include <linux/mm.h>
16#include "util.h"
17
18extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
19extern int gfs2_internal_read(struct gfs2_inode *ip,
20 char *buf, loff_t *pos, unsigned size);
21extern void gfs2_set_aops(struct inode *inode);
22
23static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
24{
25 return !ip->i_height;
26}
27
28static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
29{
30 return ip->i_diskflags & GFS2_DIF_JDATA;
31}
32
33static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
34{
35 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
36 return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
37}
38
39static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
40{
41 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
42 return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
43}
44
45static inline int gfs2_is_dir(const struct gfs2_inode *ip)
46{
47 return S_ISDIR(ip->i_inode.i_mode);
48}
49
50static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
51{
52 inode->i_blocks = blocks <<
53 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
54}
55
56static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
57{
58 return inode->i_blocks >>
59 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
60}
61
62static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
63{
64 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
65 change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
66 inode->i_blocks += change;
67}
68
69static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
70 u64 no_formal_ino)
71{
72 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
73}
74
75static inline void gfs2_inum_out(const struct gfs2_inode *ip,
76 struct gfs2_dirent *dent)
77{
78 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
79 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
80}
81
82static inline int gfs2_check_internal_file_size(struct inode *inode,
83 u64 minsize, u64 maxsize)
84{
85 u64 size = i_size_read(inode);
86 if (size < minsize || size > maxsize)
87 goto err;
88 if (size & (BIT(inode->i_blkbits) - 1))
89 goto err;
90 return 0;
91err:
92 gfs2_consist_inode(GFS2_I(inode));
93 return -EIO;
94}
95
96extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
97 u64 no_addr, u64 no_formal_ino,
98 unsigned int blktype);
99extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
100 u64 *no_formal_ino,
101 unsigned int blktype);
102
103extern int gfs2_inode_refresh(struct gfs2_inode *ip);
104
105extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
106 int is_root);
107extern int gfs2_permission(struct inode *inode, int mask);
108extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr);
109extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
110extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
111extern int gfs2_open_common(struct inode *inode, struct file *file);
112extern loff_t gfs2_seek_data(struct file *file, loff_t offset);
113extern loff_t gfs2_seek_hole(struct file *file, loff_t offset);
114
115extern const struct inode_operations gfs2_file_iops;
116extern const struct inode_operations gfs2_dir_iops;
117extern const struct inode_operations gfs2_symlink_iops;
118extern const struct file_operations gfs2_file_fops_nolock;
119extern const struct file_operations gfs2_dir_fops_nolock;
120
121extern void gfs2_set_inode_flags(struct inode *inode);
122
123#ifdef CONFIG_GFS2_FS_LOCKING_DLM
124extern const struct file_operations gfs2_file_fops;
125extern const struct file_operations gfs2_dir_fops;
126
127static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
128{
129 return sdp->sd_args.ar_localflocks;
130}
131#else /* Single node only */
132#define gfs2_file_fops gfs2_file_fops_nolock
133#define gfs2_dir_fops gfs2_dir_fops_nolock
134
135static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
136{
137 return 1;
138}
139#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
140
141#endif /* __INODE_DOT_H__ */
142