1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) International Business Machines Corp., 2000-2002
4 * Portions Copyright (C) Christoph Hellwig, 2001-2002
5 */
6
7 #include <linux/mm.h>
8 #include <linux/fs.h>
9 #include <linux/posix_acl.h>
10 #include <linux/quotaops.h>
11 #include "jfs_incore.h"
12 #include "jfs_inode.h"
13 #include "jfs_dmap.h"
14 #include "jfs_txnmgr.h"
15 #include "jfs_xattr.h"
16 #include "jfs_acl.h"
17 #include "jfs_debug.h"
18
19 int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
20 {
21 struct inode *inode = file->f_mapping->host;
22 int rc = 0;
23
24 rc = file_write_and_wait_range(file, start, end);
25 if (rc)
26 return rc;
27
28 inode_lock(inode);
29 if (!(inode->i_state & I_DIRTY_ALL) ||
30 (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
31 /* Make sure committed changes hit the disk */
32 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
33 inode_unlock(inode);
34 return rc;
35 }
36
37 rc |= jfs_commit_inode(inode, 1);
38 inode_unlock(inode);
39
40 return rc ? -EIO : 0;
41 }
42
43 static int jfs_open(struct inode *inode, struct file *file)
44 {
45 int rc;
46
47 if ((rc = dquot_file_open(inode, file)))
48 return rc;
49
50 /*
51 * We attempt to allow only one "active" file open per aggregate
52 * group. Otherwise, appending to files in parallel can cause
53 * fragmentation within the files.
54 *
55 * If the file is empty, it was probably just created and going
56 * to be written to. If it has a size, we'll hold off until the
57 * file is actually grown.
58 */
59 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
60 (inode->i_size == 0)) {
61 struct jfs_inode_info *ji = JFS_IP(inode);
62 spin_lock_irq(&ji->ag_lock);
63 if (ji->active_ag == -1) {
64 struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
65 ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
66 atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]);
67 }
68 spin_unlock_irq(&ji->ag_lock);
69 }
70
71 return 0;
72 }
73 static int jfs_release(struct inode *inode, struct file *file)
74 {
75 struct jfs_inode_info *ji = JFS_IP(inode);
76
77 spin_lock_irq(&ji->ag_lock);
78 if (ji->active_ag != -1) {
79 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
80 atomic_dec(&bmap->db_active[ji->active_ag]);
81 ji->active_ag = -1;
82 }
83 spin_unlock_irq(&ji->ag_lock);
84
85 return 0;
86 }
87
88 int jfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
89 struct iattr *iattr)
90 {
91 struct inode *inode = d_inode(dentry);
92 int rc;
93
94 rc = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
95 if (rc)
96 return rc;
97
98 if (is_quota_modification(&nop_mnt_idmap, inode, iattr)) {
99 rc = dquot_initialize(inode);
100 if (rc)
101 return rc;
102 }
103 if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
104 (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
105 rc = dquot_transfer(&nop_mnt_idmap, inode, iattr);
106 if (rc)
107 return rc;
108 }
109
110 if ((iattr->ia_valid & ATTR_SIZE) &&
111 iattr->ia_size != i_size_read(inode)) {
112 inode_dio_wait(inode);
113
114 rc = inode_newsize_ok(inode, iattr->ia_size);
115 if (rc)
116 return rc;
117
118 truncate_setsize(inode, iattr->ia_size);
119 jfs_truncate(inode);
120 }
121
122 setattr_copy(&nop_mnt_idmap, inode, iattr);
123 mark_inode_dirty(inode);
124
125 if (iattr->ia_valid & ATTR_MODE)
126 rc = posix_acl_chmod(&nop_mnt_idmap, dentry, inode->i_mode);
127 return rc;
128 }
129
130 const struct inode_operations jfs_file_inode_operations = {
131 .listxattr = jfs_listxattr,
132 .setattr = jfs_setattr,
133 .fileattr_get = jfs_fileattr_get,
134 .fileattr_set = jfs_fileattr_set,
135 #ifdef CONFIG_JFS_POSIX_ACL
136 .get_inode_acl = jfs_get_acl,
137 .set_acl = jfs_set_acl,
138 #endif
139 };
140
141 const struct file_operations jfs_file_operations = {
142 .open = jfs_open,
143 .llseek = generic_file_llseek,
144 .read_iter = generic_file_read_iter,
145 .write_iter = generic_file_write_iter,
146 .mmap = generic_file_mmap,
147 .splice_read = filemap_splice_read,
148 .splice_write = iter_file_splice_write,
149 .fsync = jfs_fsync,
150 .release = jfs_release,
151 .unlocked_ioctl = jfs_ioctl,
152 .compat_ioctl = compat_ptr_ioctl,
153 };
154
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