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
jfs_fsync(struct file * file,loff_t start,loff_t end,int datasync)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
jfs_open(struct inode * inode,struct file * file)43 static int jfs_open(struct inode *inode, struct file *file)
44 {
45 int rc;
46
47 if (S_ISREG(inode->i_mode) && inode->i_size < 0)
48 return -EIO;
49
50 if ((rc = dquot_file_open(inode, file)))
51 return rc;
52
53 /*
54 * We attempt to allow only one "active" file open per aggregate
55 * group. Otherwise, appending to files in parallel can cause
56 * fragmentation within the files.
57 *
58 * If the file is empty, it was probably just created and going
59 * to be written to. If it has a size, we'll hold off until the
60 * file is actually grown.
61 */
62 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
63 (inode->i_size == 0)) {
64 struct jfs_inode_info *ji = JFS_IP(inode);
65 spin_lock_irq(&ji->ag_lock);
66 if (ji->active_ag == -1) {
67 struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
68 ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
69 atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]);
70 }
71 spin_unlock_irq(&ji->ag_lock);
72 }
73
74 return 0;
75 }
jfs_release(struct inode * inode,struct file * file)76 static int jfs_release(struct inode *inode, struct file *file)
77 {
78 struct jfs_inode_info *ji = JFS_IP(inode);
79
80 spin_lock_irq(&ji->ag_lock);
81 if (ji->active_ag != -1) {
82 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
83 atomic_dec(&bmap->db_active[ji->active_ag]);
84 ji->active_ag = -1;
85 }
86 spin_unlock_irq(&ji->ag_lock);
87
88 return 0;
89 }
90
jfs_setattr(struct mnt_idmap * idmap,struct dentry * dentry,struct iattr * iattr)91 int jfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
92 struct iattr *iattr)
93 {
94 struct inode *inode = d_inode(dentry);
95 int rc;
96
97 rc = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
98 if (rc)
99 return rc;
100
101 if (is_quota_modification(&nop_mnt_idmap, inode, iattr)) {
102 rc = dquot_initialize(inode);
103 if (rc)
104 return rc;
105 }
106 if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
107 (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
108 rc = dquot_transfer(&nop_mnt_idmap, inode, iattr);
109 if (rc)
110 return rc;
111 }
112
113 if ((iattr->ia_valid & ATTR_SIZE) &&
114 iattr->ia_size != i_size_read(inode)) {
115 inode_dio_wait(inode);
116
117 rc = inode_newsize_ok(inode, iattr->ia_size);
118 if (rc)
119 return rc;
120
121 truncate_setsize(inode, iattr->ia_size);
122 jfs_truncate(inode);
123 }
124
125 setattr_copy(&nop_mnt_idmap, inode, iattr);
126 mark_inode_dirty(inode);
127
128 if (iattr->ia_valid & ATTR_MODE)
129 rc = posix_acl_chmod(&nop_mnt_idmap, dentry, inode->i_mode);
130 return rc;
131 }
132
133 const struct inode_operations jfs_file_inode_operations = {
134 .listxattr = jfs_listxattr,
135 .setattr = jfs_setattr,
136 .fileattr_get = jfs_fileattr_get,
137 .fileattr_set = jfs_fileattr_set,
138 #ifdef CONFIG_JFS_POSIX_ACL
139 .get_inode_acl = jfs_get_acl,
140 .set_acl = jfs_set_acl,
141 #endif
142 };
143
144 const struct file_operations jfs_file_operations = {
145 .open = jfs_open,
146 .llseek = generic_file_llseek,
147 .read_iter = generic_file_read_iter,
148 .write_iter = generic_file_write_iter,
149 .mmap = generic_file_mmap,
150 .splice_read = filemap_splice_read,
151 .splice_write = iter_file_splice_write,
152 .fsync = jfs_fsync,
153 .release = jfs_release,
154 .unlocked_ioctl = jfs_ioctl,
155 .compat_ioctl = compat_ptr_ioctl,
156 };
157