2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* file.c
|
|
|
|
*
|
|
|
|
* PURPOSE
|
|
|
|
* File handling routines for the OSTA-UDF(tm) filesystem.
|
|
|
|
*
|
|
|
|
* COPYRIGHT
|
|
|
|
* This file is distributed under the terms of the GNU General Public
|
|
|
|
* License (GPL). Copies of the GPL can be obtained from:
|
|
|
|
* ftp://prep.ai.mit.edu/pub/gnu/GPL
|
|
|
|
* Each contributing author retains all rights to their own work.
|
|
|
|
*
|
|
|
|
* (C) 1998-1999 Dave Boynton
|
|
|
|
* (C) 1998-2004 Ben Fennema
|
|
|
|
* (C) 1999-2000 Stelias Computing Inc
|
|
|
|
*
|
|
|
|
* HISTORY
|
|
|
|
*
|
|
|
|
* 10/02/98 dgb Attempt to integrate into udf.o
|
|
|
|
* 10/07/98 Switched to using generic_readpage, etc., like isofs
|
|
|
|
* And it works!
|
|
|
|
* 12/06/98 blf Added udf_file_read. uses generic_file_read for all cases but
|
|
|
|
* ICBTAG_FLAG_AD_IN_ICB.
|
|
|
|
* 04/06/99 64 bit file handling on 32 bit systems taken from ext2 file.c
|
|
|
|
* 05/12/99 Preliminary file write support
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "udfdecl.h"
|
|
|
|
#include <linux/fs.h>
|
|
|
|
#include <linux/udf_fs.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
|
|
#include <linux/kernel.h>
|
2007-07-21 11:37:18 +00:00
|
|
|
#include <linux/string.h> /* memset */
|
2006-01-11 20:17:46 +00:00
|
|
|
#include <linux/capability.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/smp_lock.h>
|
|
|
|
#include <linux/pagemap.h>
|
|
|
|
#include <linux/buffer_head.h>
|
Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.
This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
getting them indirectly
Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
they don't need sched.h
b) sched.h stops being dependency for significant number of files:
on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
after patch it's only 3744 (-8.3%).
Cross-compile tested on
all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
alpha alpha-up
arm
i386 i386-up i386-defconfig i386-allnoconfig
ia64 ia64-up
m68k
mips
parisc parisc-up
powerpc powerpc-up
s390 s390-up
sparc sparc-up
sparc64 sparc64-up
um-x86_64
x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig
as well as my two usual configs.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-20 21:22:52 +00:00
|
|
|
#include <linux/aio.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
#include "udf_i.h"
|
|
|
|
#include "udf_sb.h"
|
|
|
|
|
2007-07-19 08:47:43 +00:00
|
|
|
static int udf_adinicb_readpage(struct file *file, struct page *page)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct inode *inode = page->mapping->host;
|
|
|
|
char *kaddr;
|
|
|
|
|
2005-05-01 15:59:01 +00:00
|
|
|
BUG_ON(!PageLocked(page));
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
kaddr = kmap(page);
|
|
|
|
memset(kaddr, 0, PAGE_CACHE_SIZE);
|
|
|
|
memcpy(kaddr, UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), inode->i_size);
|
|
|
|
flush_dcache_page(page);
|
|
|
|
SetPageUptodate(page);
|
|
|
|
kunmap(page);
|
|
|
|
unlock_page(page);
|
2007-07-21 11:37:18 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-07-21 11:37:18 +00:00
|
|
|
static int udf_adinicb_writepage(struct page *page, struct writeback_control *wbc)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct inode *inode = page->mapping->host;
|
|
|
|
char *kaddr;
|
|
|
|
|
2005-05-01 15:59:01 +00:00
|
|
|
BUG_ON(!PageLocked(page));
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
kaddr = kmap(page);
|
|
|
|
memcpy(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode), kaddr, inode->i_size);
|
|
|
|
mark_inode_dirty(inode);
|
|
|
|
SetPageUptodate(page);
|
|
|
|
kunmap(page);
|
|
|
|
unlock_page(page);
|
2007-07-21 11:37:18 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-07-19 08:47:43 +00:00
|
|
|
static int udf_adinicb_prepare_write(struct file *file, struct page *page,
|
|
|
|
unsigned offset, unsigned to)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
kmap(page);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-07-19 08:47:43 +00:00
|
|
|
static int udf_adinicb_commit_write(struct file *file, struct page *page,
|
|
|
|
unsigned offset, unsigned to)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct inode *inode = page->mapping->host;
|
|
|
|
char *kaddr = page_address(page);
|
|
|
|
|
|
|
|
memcpy(UDF_I_DATA(inode) + UDF_I_LENEATTR(inode) + offset,
|
2007-07-19 08:47:43 +00:00
|
|
|
kaddr + offset, to - offset);
|
2005-04-16 22:20:36 +00:00
|
|
|
mark_inode_dirty(inode);
|
|
|
|
SetPageUptodate(page);
|
|
|
|
kunmap(page);
|
|
|
|
/* only one page here */
|
|
|
|
if (to > inode->i_size)
|
|
|
|
inode->i_size = to;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-06-28 11:26:44 +00:00
|
|
|
const struct address_space_operations udf_adinicb_aops = {
|
2007-07-21 11:37:18 +00:00
|
|
|
.readpage = udf_adinicb_readpage,
|
|
|
|
.writepage = udf_adinicb_writepage,
|
|
|
|
.sync_page = block_sync_page,
|
|
|
|
.prepare_write = udf_adinicb_prepare_write,
|
|
|
|
.commit_write = udf_adinicb_commit_write,
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
2006-10-01 06:28:48 +00:00
|
|
|
static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
|
2007-07-19 08:47:43 +00:00
|
|
|
unsigned long nr_segs, loff_t ppos)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
ssize_t retval;
|
2006-10-01 06:28:48 +00:00
|
|
|
struct file *file = iocb->ki_filp;
|
2006-12-08 10:37:44 +00:00
|
|
|
struct inode *inode = file->f_path.dentry->d_inode;
|
2005-04-16 22:20:36 +00:00
|
|
|
int err, pos;
|
2006-10-01 06:28:48 +00:00
|
|
|
size_t count = iocb->ki_left;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-19 08:47:43 +00:00
|
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) {
|
2005-04-16 22:20:36 +00:00
|
|
|
if (file->f_flags & O_APPEND)
|
|
|
|
pos = inode->i_size;
|
|
|
|
else
|
2006-10-01 06:28:48 +00:00
|
|
|
pos = ppos;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-21 11:37:18 +00:00
|
|
|
if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) +
|
|
|
|
pos + count)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
udf_expand_file_adinicb(inode, pos + count, &err);
|
2007-07-19 08:47:43 +00:00
|
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB) {
|
2005-04-16 22:20:36 +00:00
|
|
|
udf_debug("udf_expand_adinicb: err=%d\n", err);
|
|
|
|
return err;
|
|
|
|
}
|
2007-07-19 08:47:43 +00:00
|
|
|
} else {
|
2005-04-16 22:20:36 +00:00
|
|
|
if (pos + count > inode->i_size)
|
|
|
|
UDF_I_LENALLOC(inode) = pos + count;
|
|
|
|
else
|
|
|
|
UDF_I_LENALLOC(inode) = inode->i_size;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2006-10-01 06:28:48 +00:00
|
|
|
retval = generic_file_aio_write(iocb, iov, nr_segs, ppos);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (retval > 0)
|
|
|
|
mark_inode_dirty(inode);
|
2007-07-21 11:37:18 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* udf_ioctl
|
|
|
|
*
|
|
|
|
* PURPOSE
|
|
|
|
* Issue an ioctl.
|
|
|
|
*
|
|
|
|
* DESCRIPTION
|
|
|
|
* Optional - sys_ioctl() will return -ENOTTY if this routine is not
|
|
|
|
* available, and the ioctl cannot be handled without filesystem help.
|
|
|
|
*
|
|
|
|
* sys_ioctl() handles these ioctls that apply only to regular files:
|
|
|
|
* FIBMAP [requires udf_block_map()], FIGETBSZ, FIONREAD
|
|
|
|
* These ioctls are also handled by sys_ioctl():
|
|
|
|
* FIOCLEX, FIONCLEX, FIONBIO, FIOASYNC
|
|
|
|
* All other ioctls are passed to the filesystem.
|
|
|
|
*
|
|
|
|
* Refer to sys_ioctl() in fs/ioctl.c
|
|
|
|
* sys_ioctl() -> .
|
|
|
|
*
|
|
|
|
* PRE-CONDITIONS
|
|
|
|
* inode Pointer to inode that ioctl was issued on.
|
|
|
|
* filp Pointer to file that ioctl was issued on.
|
|
|
|
* cmd The ioctl command.
|
|
|
|
* arg The ioctl argument [can be interpreted as a
|
|
|
|
* user-space pointer if desired].
|
|
|
|
*
|
|
|
|
* POST-CONDITIONS
|
|
|
|
* <return> Success (>=0) or an error code (<=0) that
|
|
|
|
* sys_ioctl() will return.
|
|
|
|
*
|
|
|
|
* HISTORY
|
|
|
|
* July 1, 1997 - Andrew E. Mileski
|
|
|
|
* Written, tested, and released.
|
|
|
|
*/
|
|
|
|
int udf_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
|
2007-07-19 08:47:43 +00:00
|
|
|
unsigned long arg)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-07-21 11:37:18 +00:00
|
|
|
long old_block, new_block;
|
2005-04-16 22:20:36 +00:00
|
|
|
int result = -EINVAL;
|
|
|
|
|
2007-07-19 08:47:43 +00:00
|
|
|
if (file_permission(filp, MAY_READ) != 0) {
|
2007-07-21 11:37:18 +00:00
|
|
|
udf_debug("no permission to access inode %lu\n",
|
|
|
|
inode->i_ino);
|
2005-04-16 22:20:36 +00:00
|
|
|
return -EPERM;
|
|
|
|
}
|
|
|
|
|
2007-07-19 08:47:43 +00:00
|
|
|
if (!arg) {
|
2005-04-16 22:20:36 +00:00
|
|
|
udf_debug("invalid argument to udf_ioctl\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2007-07-19 08:47:43 +00:00
|
|
|
switch (cmd) {
|
|
|
|
case UDF_GETVOLIDENT:
|
|
|
|
return copy_to_user((char __user *)arg,
|
2007-07-21 11:37:18 +00:00
|
|
|
UDF_SB_VOLIDENT(inode->i_sb), 32) ? -EFAULT : 0;
|
2007-07-19 08:47:43 +00:00
|
|
|
case UDF_RELOCATE_BLOCKS:
|
2007-07-21 11:37:18 +00:00
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
|
|
return -EACCES;
|
|
|
|
if (get_user(old_block, (long __user *)arg))
|
|
|
|
return -EFAULT;
|
|
|
|
if ((result = udf_relocate_blocks(inode->i_sb,
|
|
|
|
old_block, &new_block)) == 0)
|
|
|
|
result = put_user(new_block, (long __user *)arg);
|
|
|
|
return result;
|
2007-07-19 08:47:43 +00:00
|
|
|
case UDF_GETEASIZE:
|
|
|
|
result = put_user(UDF_I_LENEATTR(inode), (int __user *)arg);
|
|
|
|
break;
|
|
|
|
case UDF_GETEABLOCK:
|
|
|
|
result = copy_to_user((char __user *)arg, UDF_I_DATA(inode),
|
|
|
|
UDF_I_LENEATTR(inode)) ? -EFAULT : 0;
|
|
|
|
break;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* udf_release_file
|
|
|
|
*
|
|
|
|
* PURPOSE
|
|
|
|
* Called when all references to the file are closed
|
|
|
|
*
|
|
|
|
* DESCRIPTION
|
|
|
|
* Discard prealloced blocks
|
|
|
|
*
|
|
|
|
* HISTORY
|
|
|
|
*
|
|
|
|
*/
|
2007-07-19 08:47:43 +00:00
|
|
|
static int udf_release_file(struct inode *inode, struct file *filp)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-07-19 08:47:43 +00:00
|
|
|
if (filp->f_mode & FMODE_WRITE) {
|
2005-04-16 22:20:36 +00:00
|
|
|
lock_kernel();
|
|
|
|
udf_discard_prealloc(inode);
|
|
|
|
unlock_kernel();
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-03-28 09:56:42 +00:00
|
|
|
const struct file_operations udf_file_operations = {
|
2007-07-21 11:37:18 +00:00
|
|
|
.read = do_sync_read,
|
|
|
|
.aio_read = generic_file_aio_read,
|
|
|
|
.ioctl = udf_ioctl,
|
|
|
|
.open = generic_file_open,
|
|
|
|
.mmap = generic_file_mmap,
|
|
|
|
.write = do_sync_write,
|
|
|
|
.aio_write = udf_file_aio_write,
|
|
|
|
.release = udf_release_file,
|
|
|
|
.fsync = udf_fsync_file,
|
|
|
|
.splice_read = generic_file_splice_read,
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
2007-02-12 08:55:40 +00:00
|
|
|
const struct inode_operations udf_file_inode_operations = {
|
2007-07-19 08:47:43 +00:00
|
|
|
.truncate = udf_truncate,
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|