mirror of
https://github.com/adulau/aha.git
synced 2024-12-30 12:46:17 +00:00
e542059884
Per previous discussions about cleaning up ufs_fs.h, people just want this straight up dropped from userspace export. The only remaining consumer (silo) has been fixed a while ago to not rely on this header. This allows use to move it completely from include/linux/ to fs/ufs/ seeing as how the only in-kernel consumer is fs/ufs/. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Jan Kara <jack@ucw.cz> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
287 lines
6.1 KiB
C
287 lines
6.1 KiB
C
/*
|
|
* linux/fs/ufs/util.c
|
|
*
|
|
* Copyright (C) 1998
|
|
* Daniel Pirkl <daniel.pirkl@email.cz>
|
|
* Charles University, Faculty of Mathematics and Physics
|
|
*/
|
|
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/buffer_head.h>
|
|
|
|
#include "ufs_fs.h"
|
|
#include "ufs.h"
|
|
#include "swab.h"
|
|
#include "util.h"
|
|
|
|
struct ufs_buffer_head * _ubh_bread_ (struct ufs_sb_private_info * uspi,
|
|
struct super_block *sb, u64 fragment, u64 size)
|
|
{
|
|
struct ufs_buffer_head * ubh;
|
|
unsigned i, j ;
|
|
u64 count = 0;
|
|
if (size & ~uspi->s_fmask)
|
|
return NULL;
|
|
count = size >> uspi->s_fshift;
|
|
if (count > UFS_MAXFRAG)
|
|
return NULL;
|
|
ubh = (struct ufs_buffer_head *)
|
|
kmalloc (sizeof (struct ufs_buffer_head), GFP_KERNEL);
|
|
if (!ubh)
|
|
return NULL;
|
|
ubh->fragment = fragment;
|
|
ubh->count = count;
|
|
for (i = 0; i < count; i++)
|
|
if (!(ubh->bh[i] = sb_bread(sb, fragment + i)))
|
|
goto failed;
|
|
for (; i < UFS_MAXFRAG; i++)
|
|
ubh->bh[i] = NULL;
|
|
return ubh;
|
|
failed:
|
|
for (j = 0; j < i; j++)
|
|
brelse (ubh->bh[j]);
|
|
kfree(ubh);
|
|
return NULL;
|
|
}
|
|
|
|
struct ufs_buffer_head * ubh_bread_uspi (struct ufs_sb_private_info * uspi,
|
|
struct super_block *sb, u64 fragment, u64 size)
|
|
{
|
|
unsigned i, j;
|
|
u64 count = 0;
|
|
if (size & ~uspi->s_fmask)
|
|
return NULL;
|
|
count = size >> uspi->s_fshift;
|
|
if (count <= 0 || count > UFS_MAXFRAG)
|
|
return NULL;
|
|
USPI_UBH(uspi)->fragment = fragment;
|
|
USPI_UBH(uspi)->count = count;
|
|
for (i = 0; i < count; i++)
|
|
if (!(USPI_UBH(uspi)->bh[i] = sb_bread(sb, fragment + i)))
|
|
goto failed;
|
|
for (; i < UFS_MAXFRAG; i++)
|
|
USPI_UBH(uspi)->bh[i] = NULL;
|
|
return USPI_UBH(uspi);
|
|
failed:
|
|
for (j = 0; j < i; j++)
|
|
brelse (USPI_UBH(uspi)->bh[j]);
|
|
return NULL;
|
|
}
|
|
|
|
void ubh_brelse (struct ufs_buffer_head * ubh)
|
|
{
|
|
unsigned i;
|
|
if (!ubh)
|
|
return;
|
|
for (i = 0; i < ubh->count; i++)
|
|
brelse (ubh->bh[i]);
|
|
kfree (ubh);
|
|
}
|
|
|
|
void ubh_brelse_uspi (struct ufs_sb_private_info * uspi)
|
|
{
|
|
unsigned i;
|
|
if (!USPI_UBH(uspi))
|
|
return;
|
|
for ( i = 0; i < USPI_UBH(uspi)->count; i++ ) {
|
|
brelse (USPI_UBH(uspi)->bh[i]);
|
|
USPI_UBH(uspi)->bh[i] = NULL;
|
|
}
|
|
}
|
|
|
|
void ubh_mark_buffer_dirty (struct ufs_buffer_head * ubh)
|
|
{
|
|
unsigned i;
|
|
if (!ubh)
|
|
return;
|
|
for ( i = 0; i < ubh->count; i++ )
|
|
mark_buffer_dirty (ubh->bh[i]);
|
|
}
|
|
|
|
void ubh_mark_buffer_uptodate (struct ufs_buffer_head * ubh, int flag)
|
|
{
|
|
unsigned i;
|
|
if (!ubh)
|
|
return;
|
|
if (flag) {
|
|
for ( i = 0; i < ubh->count; i++ )
|
|
set_buffer_uptodate (ubh->bh[i]);
|
|
} else {
|
|
for ( i = 0; i < ubh->count; i++ )
|
|
clear_buffer_uptodate (ubh->bh[i]);
|
|
}
|
|
}
|
|
|
|
void ubh_ll_rw_block(int rw, struct ufs_buffer_head *ubh)
|
|
{
|
|
if (!ubh)
|
|
return;
|
|
|
|
ll_rw_block(rw, ubh->count, ubh->bh);
|
|
}
|
|
|
|
void ubh_wait_on_buffer (struct ufs_buffer_head * ubh)
|
|
{
|
|
unsigned i;
|
|
if (!ubh)
|
|
return;
|
|
for ( i = 0; i < ubh->count; i++ )
|
|
wait_on_buffer (ubh->bh[i]);
|
|
}
|
|
|
|
void ubh_bforget (struct ufs_buffer_head * ubh)
|
|
{
|
|
unsigned i;
|
|
if (!ubh)
|
|
return;
|
|
for ( i = 0; i < ubh->count; i++ ) if ( ubh->bh[i] )
|
|
bforget (ubh->bh[i]);
|
|
}
|
|
|
|
int ubh_buffer_dirty (struct ufs_buffer_head * ubh)
|
|
{
|
|
unsigned i;
|
|
unsigned result = 0;
|
|
if (!ubh)
|
|
return 0;
|
|
for ( i = 0; i < ubh->count; i++ )
|
|
result |= buffer_dirty(ubh->bh[i]);
|
|
return result;
|
|
}
|
|
|
|
void _ubh_ubhcpymem_(struct ufs_sb_private_info * uspi,
|
|
unsigned char * mem, struct ufs_buffer_head * ubh, unsigned size)
|
|
{
|
|
unsigned len, bhno;
|
|
if (size > (ubh->count << uspi->s_fshift))
|
|
size = ubh->count << uspi->s_fshift;
|
|
bhno = 0;
|
|
while (size) {
|
|
len = min_t(unsigned int, size, uspi->s_fsize);
|
|
memcpy (mem, ubh->bh[bhno]->b_data, len);
|
|
mem += uspi->s_fsize;
|
|
size -= len;
|
|
bhno++;
|
|
}
|
|
}
|
|
|
|
void _ubh_memcpyubh_(struct ufs_sb_private_info * uspi,
|
|
struct ufs_buffer_head * ubh, unsigned char * mem, unsigned size)
|
|
{
|
|
unsigned len, bhno;
|
|
if (size > (ubh->count << uspi->s_fshift))
|
|
size = ubh->count << uspi->s_fshift;
|
|
bhno = 0;
|
|
while (size) {
|
|
len = min_t(unsigned int, size, uspi->s_fsize);
|
|
memcpy (ubh->bh[bhno]->b_data, mem, len);
|
|
mem += uspi->s_fsize;
|
|
size -= len;
|
|
bhno++;
|
|
}
|
|
}
|
|
|
|
dev_t
|
|
ufs_get_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi)
|
|
{
|
|
__u32 fs32;
|
|
dev_t dev;
|
|
|
|
if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
|
|
fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[1]);
|
|
else
|
|
fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[0]);
|
|
switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
|
|
case UFS_ST_SUNx86:
|
|
case UFS_ST_SUN:
|
|
if ((fs32 & 0xffff0000) == 0 ||
|
|
(fs32 & 0xffff0000) == 0xffff0000)
|
|
dev = old_decode_dev(fs32 & 0x7fff);
|
|
else
|
|
dev = MKDEV(sysv_major(fs32), sysv_minor(fs32));
|
|
break;
|
|
|
|
default:
|
|
dev = old_decode_dev(fs32);
|
|
break;
|
|
}
|
|
return dev;
|
|
}
|
|
|
|
void
|
|
ufs_set_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi, dev_t dev)
|
|
{
|
|
__u32 fs32;
|
|
|
|
switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
|
|
case UFS_ST_SUNx86:
|
|
case UFS_ST_SUN:
|
|
fs32 = sysv_encode_dev(dev);
|
|
if ((fs32 & 0xffff8000) == 0) {
|
|
fs32 = old_encode_dev(dev);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
fs32 = old_encode_dev(dev);
|
|
break;
|
|
}
|
|
if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
|
|
ufsi->i_u1.i_data[1] = cpu_to_fs32(sb, fs32);
|
|
else
|
|
ufsi->i_u1.i_data[0] = cpu_to_fs32(sb, fs32);
|
|
}
|
|
|
|
/**
|
|
* ufs_get_locked_page() - locate, pin and lock a pagecache page, if not exist
|
|
* read it from disk.
|
|
* @mapping: the address_space to search
|
|
* @index: the page index
|
|
*
|
|
* Locates the desired pagecache page, if not exist we'll read it,
|
|
* locks it, increments its reference
|
|
* count and returns its address.
|
|
*
|
|
*/
|
|
|
|
struct page *ufs_get_locked_page(struct address_space *mapping,
|
|
pgoff_t index)
|
|
{
|
|
struct page *page;
|
|
|
|
page = find_lock_page(mapping, index);
|
|
if (!page) {
|
|
page = read_mapping_page(mapping, index, NULL);
|
|
|
|
if (IS_ERR(page)) {
|
|
printk(KERN_ERR "ufs_change_blocknr: "
|
|
"read_mapping_page error: ino %lu, index: %lu\n",
|
|
mapping->host->i_ino, index);
|
|
goto out;
|
|
}
|
|
|
|
lock_page(page);
|
|
|
|
if (unlikely(page->mapping == NULL)) {
|
|
/* Truncate got there first */
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
page = NULL;
|
|
goto out;
|
|
}
|
|
|
|
if (!PageUptodate(page) || PageError(page)) {
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
|
|
printk(KERN_ERR "ufs_change_blocknr: "
|
|
"can not read page: ino %lu, index: %lu\n",
|
|
mapping->host->i_ino, index);
|
|
|
|
page = ERR_PTR(-EIO);
|
|
}
|
|
}
|
|
out:
|
|
return page;
|
|
}
|