blob: 31606076f7015671350f061819e588dd75e08ffe [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
10#ifndef __INODE_DOT_H__
11#define __INODE_DOT_H__
12
Steven Whitehouseb2760582008-10-14 16:05:55 +010013#include <linux/fs.h>
Steven Whitehouseb1e71b02009-05-22 10:01:55 +010014#include <linux/buffer_head.h>
15#include <linux/mm.h>
Steven Whitehouse77658aa2008-02-12 14:17:27 +000016#include "util.h"
17
Steven Whitehouseb1e71b02009-05-22 10:01:55 +010018extern 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);
Benjamin Marzinski39211202010-08-20 00:21:02 -050022extern void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
23 unsigned int from, unsigned int to);
Steven Whitehouseb1e71b02009-05-22 10:01:55 +010024extern void gfs2_set_aops(struct inode *inode);
25
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010026static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +000027{
Steven Whitehouseecc30c72008-01-28 10:37:35 +000028 return !ip->i_height;
David Teiglandb3b94fa2006-01-16 16:50:04 +000029}
30
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010031static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +000032{
Steven Whitehouse383f01f2008-11-04 10:05:22 +000033 return ip->i_diskflags & GFS2_DIF_JDATA;
David Teiglandb3b94fa2006-01-16 16:50:04 +000034}
35
Steven Whitehousebf36a712007-10-17 08:35:19 +010036static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
37{
38 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
39 return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
40}
41
Steven Whitehouse55610932007-10-17 08:47:38 +010042static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
43{
44 const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
45 return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
46}
47
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010048static inline int gfs2_is_dir(const struct gfs2_inode *ip)
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000049{
Steven Whitehouseb60623c2006-11-01 12:22:46 -050050 return S_ISDIR(ip->i_inode.i_mode);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000051}
52
Steven Whitehouse77658aa2008-02-12 14:17:27 +000053static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
Steven Whitehouse9e2dbda2006-11-08 15:45:46 -050054{
Steven Whitehouse77658aa2008-02-12 14:17:27 +000055 inode->i_blocks = blocks <<
Steven Whitehouse9e2dbda2006-11-08 15:45:46 -050056 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
57}
58
Steven Whitehouse77658aa2008-02-12 14:17:27 +000059static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
60{
61 return inode->i_blocks >>
62 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
63}
64
65static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
66{
67 gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
68 change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
69 inode->i_blocks += change;
70}
71
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010072static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
73 u64 no_formal_ino)
74{
75 return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
76}
77
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010078static inline void gfs2_inum_out(const struct gfs2_inode *ip,
79 struct gfs2_dirent *dent)
80{
81 dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
82 dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
83}
84
Steven Whitehousea2e0f792010-08-11 09:53:11 +010085static inline int gfs2_check_internal_file_size(struct inode *inode,
86 u64 minsize, u64 maxsize)
87{
88 u64 size = i_size_read(inode);
89 if (size < minsize || size > maxsize)
90 goto err;
91 if (size & ((1 << inode->i_blkbits) - 1))
92 goto err;
93 return 0;
94err:
95 gfs2_consist_inode(GFS2_I(inode));
96 return -EIO;
97}
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010098
Steven Whitehouseb1e71b02009-05-22 10:01:55 +010099extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
Bob Peterson44ad37d2011-03-17 16:19:58 -0400100 u64 no_addr, u64 no_formal_ino,
101 int non_block);
Steven Whitehouse044b9412010-11-03 20:01:07 +0000102extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
103 u64 *no_formal_ino,
104 unsigned int blktype);
Steven Whitehouse4667a0e2011-04-18 14:18:09 +0100105extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int nonblock);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000106
Steven Whitehouseb1e71b02009-05-22 10:01:55 +0100107extern int gfs2_inode_refresh(struct gfs2_inode *ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000108
Steven Whitehouseb1e71b02009-05-22 10:01:55 +0100109extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
110 int is_root);
Nick Pigginb74c79e2011-01-07 17:49:58 +1100111extern int gfs2_permission(struct inode *inode, int mask, unsigned int flags);
Steven Whitehouseb1e71b02009-05-22 10:01:55 +0100112extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
113extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
114extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000115
Steven Whitehouseb2760582008-10-14 16:05:55 +0100116extern const struct inode_operations gfs2_file_iops;
117extern const struct inode_operations gfs2_dir_iops;
118extern const struct inode_operations gfs2_symlink_iops;
Christoph Hellwig10d21982009-04-07 19:42:17 +0200119extern const struct file_operations gfs2_file_fops_nolock;
120extern const struct file_operations gfs2_dir_fops_nolock;
Steven Whitehouseb2760582008-10-14 16:05:55 +0100121
122extern void gfs2_set_inode_flags(struct inode *inode);
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000123
124#ifdef CONFIG_GFS2_FS_LOCKING_DLM
Christoph Hellwig10d21982009-04-07 19:42:17 +0200125extern const struct file_operations gfs2_file_fops;
126extern const struct file_operations gfs2_dir_fops;
127
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000128static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
129{
130 return sdp->sd_args.ar_localflocks;
131}
132#else /* Single node only */
Christoph Hellwig10d21982009-04-07 19:42:17 +0200133#define gfs2_file_fops gfs2_file_fops_nolock
134#define gfs2_dir_fops gfs2_dir_fops_nolock
135
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000136static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
137{
138 return 1;
139}
140#endif /* CONFIG_GFS2_FS_LOCKING_DLM */
Steven Whitehouseb2760582008-10-14 16:05:55 +0100141
David Teiglandb3b94fa2006-01-16 16:50:04 +0000142#endif /* __INODE_DOT_H__ */
143