[GFS2] Update truncate function (shrinking partial blocks)
[linux-2.6-block.git] / fs / gfs2 / inode.h
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1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 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 v.2.
8 */
9
10#ifndef __INODE_DOT_H__
11#define __INODE_DOT_H__
12
13static inline int gfs2_is_stuffed(struct gfs2_inode *ip)
14{
15 return !ip->i_di.di_height;
16}
17
18static inline int gfs2_is_jdata(struct gfs2_inode *ip)
19{
20 return ip->i_di.di_flags & GFS2_DIF_JDATA;
21}
22
23void gfs2_inode_attr_in(struct gfs2_inode *ip);
24void gfs2_inode_attr_out(struct gfs2_inode *ip);
25struct inode *gfs2_ip2v_lookup(struct gfs2_inode *ip);
26struct inode *gfs2_ip2v(struct gfs2_inode *ip);
27struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum *inum);
28
29void gfs2_inode_min_init(struct gfs2_inode *ip, unsigned int type);
30int gfs2_inode_refresh(struct gfs2_inode *ip);
31
32int gfs2_inode_get(struct gfs2_glock *i_gl,
33 struct gfs2_inum *inum, int create,
34 struct gfs2_inode **ipp);
35void gfs2_inode_hold(struct gfs2_inode *ip);
36void gfs2_inode_put(struct gfs2_inode *ip);
37void gfs2_inode_destroy(struct gfs2_inode *ip);
38
39int gfs2_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul);
40
41int gfs2_change_nlink(struct gfs2_inode *ip, int diff);
42int gfs2_lookupi(struct gfs2_inode *dip, struct qstr *name, int is_root,
43 struct gfs2_inode **ipp);
44int gfs2_createi(struct gfs2_holder *ghs, struct qstr *name, unsigned int mode);
45int gfs2_unlinki(struct gfs2_inode *dip, struct qstr *name,
46 struct gfs2_inode *ip, struct gfs2_unlinked *ul);
47int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name,
48 struct gfs2_inode *ip, struct gfs2_unlinked *ul);
49int gfs2_unlink_ok(struct gfs2_inode *dip, struct qstr *name,
50 struct gfs2_inode *ip);
51int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to);
52int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len);
53
54int gfs2_glock_nq_atime(struct gfs2_holder *gh);
55int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs);
56
57void gfs2_try_toss_vnode(struct gfs2_inode *ip);
58
59int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr);
60
61int gfs2_repermission(struct inode *inode, int mask, struct nameidata *nd);
62
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63static inline int gfs2_lookup_simple(struct inode *dip, char *name,
64 struct inode **ipp)
b3b94faa 65{
f42faf4f 66 struct gfs2_inode *ip;
b3b94faa 67 struct qstr qstr;
f42faf4f 68 int err;
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69 memset(&qstr, 0, sizeof(struct qstr));
70 qstr.name = name;
71 qstr.len = strlen(name);
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72 err = gfs2_lookupi(get_v2ip(dip), &qstr, 1, &ip);
73 if (err == 0) {
74 *ipp = gfs2_ip2v(ip);
75 if (*ipp == NULL)
76 err = -ENOMEM;
77 gfs2_inode_put(ip);
78 }
79 return err;
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80}
81
82#endif /* __INODE_DOT_H__ */
83