xref: /openbmc/linux/fs/jfs/jfs_inode.c (revision 63dc02bd)
1 /*
2  *   Copyright (C) International Business Machines Corp., 2000-2004
3  *
4  *   This program is free software;  you can redistribute it and/or modify
5  *   it under the terms of the GNU General Public License as published by
6  *   the Free Software Foundation; either version 2 of the License, or
7  *   (at your option) any later version.
8  *
9  *   This program is distributed in the hope that it will be useful,
10  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
12  *   the GNU General Public License for more details.
13  *
14  *   You should have received a copy of the GNU General Public License
15  *   along with this program;  if not, write to the Free Software
16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  */
18 
19 #include <linux/fs.h>
20 #include <linux/quotaops.h>
21 #include "jfs_incore.h"
22 #include "jfs_inode.h"
23 #include "jfs_filsys.h"
24 #include "jfs_imap.h"
25 #include "jfs_dinode.h"
26 #include "jfs_debug.h"
27 
28 
29 void jfs_set_inode_flags(struct inode *inode)
30 {
31 	unsigned int flags = JFS_IP(inode)->mode2;
32 
33 	inode->i_flags &= ~(S_IMMUTABLE | S_APPEND |
34 		S_NOATIME | S_DIRSYNC | S_SYNC);
35 
36 	if (flags & JFS_IMMUTABLE_FL)
37 		inode->i_flags |= S_IMMUTABLE;
38 	if (flags & JFS_APPEND_FL)
39 		inode->i_flags |= S_APPEND;
40 	if (flags & JFS_NOATIME_FL)
41 		inode->i_flags |= S_NOATIME;
42 	if (flags & JFS_DIRSYNC_FL)
43 		inode->i_flags |= S_DIRSYNC;
44 	if (flags & JFS_SYNC_FL)
45 		inode->i_flags |= S_SYNC;
46 }
47 
48 void jfs_get_inode_flags(struct jfs_inode_info *jfs_ip)
49 {
50 	unsigned int flags = jfs_ip->vfs_inode.i_flags;
51 
52 	jfs_ip->mode2 &= ~(JFS_IMMUTABLE_FL | JFS_APPEND_FL | JFS_NOATIME_FL |
53 			   JFS_DIRSYNC_FL | JFS_SYNC_FL);
54 	if (flags & S_IMMUTABLE)
55 		jfs_ip->mode2 |= JFS_IMMUTABLE_FL;
56 	if (flags & S_APPEND)
57 		jfs_ip->mode2 |= JFS_APPEND_FL;
58 	if (flags & S_NOATIME)
59 		jfs_ip->mode2 |= JFS_NOATIME_FL;
60 	if (flags & S_DIRSYNC)
61 		jfs_ip->mode2 |= JFS_DIRSYNC_FL;
62 	if (flags & S_SYNC)
63 		jfs_ip->mode2 |= JFS_SYNC_FL;
64 }
65 
66 /*
67  * NAME:	ialloc()
68  *
69  * FUNCTION:	Allocate a new inode
70  *
71  */
72 struct inode *ialloc(struct inode *parent, umode_t mode)
73 {
74 	struct super_block *sb = parent->i_sb;
75 	struct inode *inode;
76 	struct jfs_inode_info *jfs_inode;
77 	int rc;
78 
79 	inode = new_inode(sb);
80 	if (!inode) {
81 		jfs_warn("ialloc: new_inode returned NULL!");
82 		rc = -ENOMEM;
83 		goto fail;
84 	}
85 
86 	jfs_inode = JFS_IP(inode);
87 
88 	rc = diAlloc(parent, S_ISDIR(mode), inode);
89 	if (rc) {
90 		jfs_warn("ialloc: diAlloc returned %d!", rc);
91 		if (rc == -EIO)
92 			make_bad_inode(inode);
93 		goto fail_put;
94 	}
95 
96 	if (insert_inode_locked(inode) < 0) {
97 		rc = -EINVAL;
98 		goto fail_unlock;
99 	}
100 
101 	inode_init_owner(inode, parent, mode);
102 	/*
103 	 * New inodes need to save sane values on disk when
104 	 * uid & gid mount options are used
105 	 */
106 	jfs_inode->saved_uid = inode->i_uid;
107 	jfs_inode->saved_gid = inode->i_gid;
108 
109 	/*
110 	 * Allocate inode to quota.
111 	 */
112 	dquot_initialize(inode);
113 	rc = dquot_alloc_inode(inode);
114 	if (rc)
115 		goto fail_drop;
116 
117 	/* inherit flags from parent */
118 	jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;
119 
120 	if (S_ISDIR(mode)) {
121 		jfs_inode->mode2 |= IDIRECTORY;
122 		jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
123 	}
124 	else {
125 		jfs_inode->mode2 |= INLINEEA | ISPARSE;
126 		if (S_ISLNK(mode))
127 			jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
128 	}
129 	jfs_inode->mode2 |= inode->i_mode;
130 
131 	inode->i_blocks = 0;
132 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
133 	jfs_inode->otime = inode->i_ctime.tv_sec;
134 	inode->i_generation = JFS_SBI(sb)->gengen++;
135 
136 	jfs_inode->cflag = 0;
137 
138 	/* Zero remaining fields */
139 	memset(&jfs_inode->acl, 0, sizeof(dxd_t));
140 	memset(&jfs_inode->ea, 0, sizeof(dxd_t));
141 	jfs_inode->next_index = 0;
142 	jfs_inode->acltype = 0;
143 	jfs_inode->btorder = 0;
144 	jfs_inode->btindex = 0;
145 	jfs_inode->bxflag = 0;
146 	jfs_inode->blid = 0;
147 	jfs_inode->atlhead = 0;
148 	jfs_inode->atltail = 0;
149 	jfs_inode->xtlid = 0;
150 	jfs_set_inode_flags(inode);
151 
152 	jfs_info("ialloc returns inode = 0x%p\n", inode);
153 
154 	return inode;
155 
156 fail_drop:
157 	dquot_drop(inode);
158 	inode->i_flags |= S_NOQUOTA;
159 fail_unlock:
160 	clear_nlink(inode);
161 	unlock_new_inode(inode);
162 fail_put:
163 	iput(inode);
164 fail:
165 	return ERR_PTR(rc);
166 }
167