5 * File handling routines for the OSTA-UDF(tm) filesystem.
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
13 * (C) 1998-1999 Dave Boynton
14 * (C) 1998-2004 Ben Fennema
15 * (C) 1999-2000 Stelias Computing Inc
19 * 10/02/98 dgb Attempt to integrate into udf.o
20 * 10/07/98 Switched to using generic_readpage, etc., like isofs
22 * 12/06/98 blf Added udf_file_read. uses generic_file_read for all cases but
23 * ICBTAG_FLAG_AD_IN_ICB.
24 * 04/06/99 64 bit file handling on 32 bit systems taken from ext2 file.c
25 * 05/12/99 Preliminary file write support
30 #include <asm/uaccess.h>
31 #include <linux/kernel.h>
32 #include <linux/string.h> /* memset */
33 #include <linux/capability.h>
34 #include <linux/errno.h>
35 #include <linux/smp_lock.h>
36 #include <linux/pagemap.h>
37 #include <linux/quotaops.h>
38 #include <linux/buffer_head.h>
39 #include <linux/aio.h>
40 #include <linux/smp_lock.h>
45 static int udf_adinicb_readpage(struct file
*file
, struct page
*page
)
47 struct inode
*inode
= page
->mapping
->host
;
49 struct udf_inode_info
*iinfo
= UDF_I(inode
);
51 BUG_ON(!PageLocked(page
));
54 memset(kaddr
, 0, PAGE_CACHE_SIZE
);
55 memcpy(kaddr
, iinfo
->i_ext
.i_data
+ iinfo
->i_lenEAttr
, inode
->i_size
);
56 flush_dcache_page(page
);
57 SetPageUptodate(page
);
64 static int udf_adinicb_writepage(struct page
*page
,
65 struct writeback_control
*wbc
)
67 struct inode
*inode
= page
->mapping
->host
;
69 struct udf_inode_info
*iinfo
= UDF_I(inode
);
71 BUG_ON(!PageLocked(page
));
74 memcpy(iinfo
->i_ext
.i_data
+ iinfo
->i_lenEAttr
, kaddr
, inode
->i_size
);
75 mark_inode_dirty(inode
);
76 SetPageUptodate(page
);
83 static int udf_adinicb_write_end(struct file
*file
,
84 struct address_space
*mapping
,
85 loff_t pos
, unsigned len
, unsigned copied
,
86 struct page
*page
, void *fsdata
)
88 struct inode
*inode
= mapping
->host
;
89 unsigned offset
= pos
& (PAGE_CACHE_SIZE
- 1);
91 struct udf_inode_info
*iinfo
= UDF_I(inode
);
93 kaddr
= kmap_atomic(page
, KM_USER0
);
94 memcpy(iinfo
->i_ext
.i_data
+ iinfo
->i_lenEAttr
+ offset
,
95 kaddr
+ offset
, copied
);
96 kunmap_atomic(kaddr
, KM_USER0
);
98 return simple_write_end(file
, mapping
, pos
, len
, copied
, page
, fsdata
);
101 const struct address_space_operations udf_adinicb_aops
= {
102 .readpage
= udf_adinicb_readpage
,
103 .writepage
= udf_adinicb_writepage
,
104 .sync_page
= block_sync_page
,
105 .write_begin
= simple_write_begin
,
106 .write_end
= udf_adinicb_write_end
,
109 static ssize_t
udf_file_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
110 unsigned long nr_segs
, loff_t ppos
)
113 struct file
*file
= iocb
->ki_filp
;
114 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
116 size_t count
= iocb
->ki_left
;
117 struct udf_inode_info
*iinfo
= UDF_I(inode
);
119 if (iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
120 if (file
->f_flags
& O_APPEND
)
125 if (inode
->i_sb
->s_blocksize
<
126 (udf_file_entry_alloc_offset(inode
) +
128 udf_expand_file_adinicb(inode
, pos
+ count
, &err
);
129 if (iinfo
->i_alloc_type
== ICBTAG_FLAG_AD_IN_ICB
) {
130 udf_debug("udf_expand_adinicb: err=%d\n", err
);
134 if (pos
+ count
> inode
->i_size
)
135 iinfo
->i_lenAlloc
= pos
+ count
;
137 iinfo
->i_lenAlloc
= inode
->i_size
;
141 retval
= generic_file_aio_write(iocb
, iov
, nr_segs
, ppos
);
143 mark_inode_dirty(inode
);
148 long udf_ioctl(struct file
*filp
, unsigned int cmd
, unsigned long arg
)
150 struct inode
*inode
= filp
->f_dentry
->d_inode
;
151 long old_block
, new_block
;
152 int result
= -EINVAL
;
156 if (file_permission(filp
, MAY_READ
) != 0) {
157 udf_debug("no permission to access inode %lu\n", inode
->i_ino
);
163 udf_debug("invalid argument to udf_ioctl\n");
169 case UDF_GETVOLIDENT
:
170 if (copy_to_user((char __user
*)arg
,
171 UDF_SB(inode
->i_sb
)->s_volume_ident
, 32))
176 case UDF_RELOCATE_BLOCKS
:
177 if (!capable(CAP_SYS_ADMIN
)) {
181 if (get_user(old_block
, (long __user
*)arg
)) {
185 result
= udf_relocate_blocks(inode
->i_sb
,
186 old_block
, &new_block
);
188 result
= put_user(new_block
, (long __user
*)arg
);
191 result
= put_user(UDF_I(inode
)->i_lenEAttr
, (int __user
*)arg
);
194 result
= copy_to_user((char __user
*)arg
,
195 UDF_I(inode
)->i_ext
.i_data
,
196 UDF_I(inode
)->i_lenEAttr
) ? -EFAULT
: 0;
205 static int udf_release_file(struct inode
*inode
, struct file
*filp
)
207 if (filp
->f_mode
& FMODE_WRITE
) {
208 mutex_lock(&inode
->i_mutex
);
210 udf_discard_prealloc(inode
);
211 udf_truncate_tail_extent(inode
);
213 mutex_unlock(&inode
->i_mutex
);
218 const struct file_operations udf_file_operations
= {
219 .read
= do_sync_read
,
220 .aio_read
= generic_file_aio_read
,
221 .unlocked_ioctl
= udf_ioctl
,
222 .open
= dquot_file_open
,
223 .mmap
= generic_file_mmap
,
224 .write
= do_sync_write
,
225 .aio_write
= udf_file_aio_write
,
226 .release
= udf_release_file
,
227 .fsync
= generic_file_fsync
,
228 .splice_read
= generic_file_splice_read
,
229 .llseek
= generic_file_llseek
,
232 int udf_setattr(struct dentry
*dentry
, struct iattr
*iattr
)
234 struct inode
*inode
= dentry
->d_inode
;
237 error
= inode_change_ok(inode
, iattr
);
241 if (is_quota_modification(inode
, iattr
))
242 dquot_initialize(inode
);
244 if ((iattr
->ia_valid
& ATTR_UID
&& iattr
->ia_uid
!= inode
->i_uid
) ||
245 (iattr
->ia_valid
& ATTR_GID
&& iattr
->ia_gid
!= inode
->i_gid
)) {
246 error
= dquot_transfer(inode
, iattr
);
251 return inode_setattr(inode
, iattr
);
254 const struct inode_operations udf_file_inode_operations
= {
255 .truncate
= udf_truncate
,
256 .setattr
= udf_setattr
,