ia64/linux-2.6.18-xen.hg

view fs/jfs/jfs_inode.c @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
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 */
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"
29 void jfs_set_inode_flags(struct inode *inode)
30 {
31 unsigned int flags = JFS_IP(inode)->mode2;
33 inode->i_flags &= ~(S_IMMUTABLE | S_APPEND |
34 S_NOATIME | S_DIRSYNC | S_SYNC);
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 }
48 /*
49 * NAME: ialloc()
50 *
51 * FUNCTION: Allocate a new inode
52 *
53 */
54 struct inode *ialloc(struct inode *parent, umode_t mode)
55 {
56 struct super_block *sb = parent->i_sb;
57 struct inode *inode;
58 struct jfs_inode_info *jfs_inode;
59 int rc;
61 inode = new_inode(sb);
62 if (!inode) {
63 jfs_warn("ialloc: new_inode returned NULL!");
64 return inode;
65 }
67 jfs_inode = JFS_IP(inode);
69 rc = diAlloc(parent, S_ISDIR(mode), inode);
70 if (rc) {
71 jfs_warn("ialloc: diAlloc returned %d!", rc);
72 make_bad_inode(inode);
73 iput(inode);
74 return NULL;
75 }
77 inode->i_uid = current->fsuid;
78 if (parent->i_mode & S_ISGID) {
79 inode->i_gid = parent->i_gid;
80 if (S_ISDIR(mode))
81 mode |= S_ISGID;
82 } else
83 inode->i_gid = current->fsgid;
85 /*
86 * New inodes need to save sane values on disk when
87 * uid & gid mount options are used
88 */
89 jfs_inode->saved_uid = inode->i_uid;
90 jfs_inode->saved_gid = inode->i_gid;
92 /*
93 * Allocate inode to quota.
94 */
95 if (DQUOT_ALLOC_INODE(inode)) {
96 DQUOT_DROP(inode);
97 inode->i_flags |= S_NOQUOTA;
98 inode->i_nlink = 0;
99 iput(inode);
100 return NULL;
101 }
103 inode->i_mode = mode;
104 /* inherit flags from parent */
105 jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;
107 if (S_ISDIR(mode)) {
108 jfs_inode->mode2 |= IDIRECTORY;
109 jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
110 }
111 else {
112 jfs_inode->mode2 |= INLINEEA | ISPARSE;
113 if (S_ISLNK(mode))
114 jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
115 }
116 jfs_inode->mode2 |= mode;
118 inode->i_blksize = sb->s_blocksize;
119 inode->i_blocks = 0;
120 inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
121 jfs_inode->otime = inode->i_ctime.tv_sec;
122 inode->i_generation = JFS_SBI(sb)->gengen++;
124 jfs_inode->cflag = 0;
126 /* Zero remaining fields */
127 memset(&jfs_inode->acl, 0, sizeof(dxd_t));
128 memset(&jfs_inode->ea, 0, sizeof(dxd_t));
129 jfs_inode->next_index = 0;
130 jfs_inode->acltype = 0;
131 jfs_inode->btorder = 0;
132 jfs_inode->btindex = 0;
133 jfs_inode->bxflag = 0;
134 jfs_inode->blid = 0;
135 jfs_inode->atlhead = 0;
136 jfs_inode->atltail = 0;
137 jfs_inode->xtlid = 0;
138 jfs_set_inode_flags(inode);
140 jfs_info("ialloc returns inode = 0x%p\n", inode);
142 return inode;
143 }