Contributors: 13
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Linus Torvalds (pre-git) |
699 |
61.05% |
19 |
43.18% |
| Alex Kiernan |
162 |
14.15% |
1 |
2.27% |
| Evgeniy Dushistov |
103 |
9.00% |
5 |
11.36% |
| Al Viro |
66 |
5.76% |
4 |
9.09% |
| Linus Torvalds |
34 |
2.97% |
3 |
6.82% |
| Matthew Wilcox |
26 |
2.27% |
2 |
4.55% |
| Christoph Hellwig |
21 |
1.83% |
3 |
6.82% |
| Andrew Morton |
17 |
1.48% |
2 |
4.55% |
| Dave Jones |
12 |
1.05% |
1 |
2.27% |
| Mike Frysinger |
2 |
0.17% |
1 |
2.27% |
| Greg Kroah-Hartman |
1 |
0.09% |
1 |
2.27% |
| Arnd Bergmann |
1 |
0.09% |
1 |
2.27% |
| Michael Christie |
1 |
0.09% |
1 |
2.27% |
| Total |
1145 |
|
44 |
|
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// SPDX-License-Identifier: GPL-2.0
/*
* 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 = kmalloc (sizeof (struct ufs_buffer_head), GFP_NOFS);
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_sync_block(struct ufs_buffer_head *ubh)
{
if (ubh) {
unsigned i;
for (i = 0; i < ubh->count; i++)
write_dirty_buffer(ubh->bh[i], 0);
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;
}
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_folio() - locate, pin and lock a pagecache folio, if not exist
* read it from disk.
* @mapping: the address_space to search
* @index: the page index
*
* Locates the desired pagecache folio, if not exist we'll read it,
* locks it, increments its reference
* count and returns its address.
*
*/
struct folio *ufs_get_locked_folio(struct address_space *mapping,
pgoff_t index)
{
struct inode *inode = mapping->host;
struct folio *folio = filemap_lock_folio(mapping, index);
if (IS_ERR(folio)) {
folio = read_mapping_folio(mapping, index, NULL);
if (IS_ERR(folio)) {
printk(KERN_ERR "ufs_change_blocknr: read_mapping_folio error: ino %lu, index: %lu\n",
mapping->host->i_ino, index);
return folio;
}
folio_lock(folio);
if (unlikely(folio->mapping == NULL)) {
/* Truncate got there first */
folio_unlock(folio);
folio_put(folio);
return NULL;
}
}
if (!folio_buffers(folio))
create_empty_buffers(folio, 1 << inode->i_blkbits, 0);
return folio;
}