Root/fs/jfs/jfs_inode.c

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
29void 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
48void 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 */
72struct 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
156fail_drop:
157    dquot_drop(inode);
158    inode->i_flags |= S_NOQUOTA;
159fail_unlock:
160    inode->i_nlink = 0;
161    unlock_new_inode(inode);
162fail_put:
163    iput(inode);
164fail:
165    return ERR_PTR(rc);
166}
167

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