/*
|
/*
|
* linux/fs/ext2/inode.c
|
* linux/fs/ext2/inode.c
|
*
|
*
|
* Copyright (C) 1992, 1993, 1994, 1995
|
* Copyright (C) 1992, 1993, 1994, 1995
|
* Remy Card (card@masi.ibp.fr)
|
* Remy Card (card@masi.ibp.fr)
|
* Laboratoire MASI - Institut Blaise Pascal
|
* Laboratoire MASI - Institut Blaise Pascal
|
* Universite Pierre et Marie Curie (Paris VI)
|
* Universite Pierre et Marie Curie (Paris VI)
|
*
|
*
|
* from
|
* from
|
*
|
*
|
* linux/fs/minix/inode.c
|
* linux/fs/minix/inode.c
|
*
|
*
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
*
|
*
|
* Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
|
* Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
|
* Big-endian to little-endian byte-swapping/bitmaps by
|
* Big-endian to little-endian byte-swapping/bitmaps by
|
* David S. Miller (davem@caip.rutgers.edu), 1995
|
* David S. Miller (davem@caip.rutgers.edu), 1995
|
*/
|
*/
|
|
|
#include <asm/segment.h>
|
#include <asm/segment.h>
|
#include <asm/system.h>
|
#include <asm/system.h>
|
|
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/fs.h>
|
#include <linux/fs.h>
|
#include <linux/ext2_fs.h>
|
#include <linux/ext2_fs.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/stat.h>
|
#include <linux/stat.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/locks.h>
|
#include <linux/locks.h>
|
#include <linux/mm.h>
|
#include <linux/mm.h>
|
|
|
static int ext2_update_inode(struct inode * inode, int do_sync);
|
static int ext2_update_inode(struct inode * inode, int do_sync);
|
|
|
void ext2_put_inode (struct inode * inode)
|
void ext2_put_inode (struct inode * inode)
|
{
|
{
|
ext2_discard_prealloc (inode);
|
ext2_discard_prealloc (inode);
|
if (inode->i_nlink || inode->i_ino == EXT2_ACL_IDX_INO ||
|
if (inode->i_nlink || inode->i_ino == EXT2_ACL_IDX_INO ||
|
inode->i_ino == EXT2_ACL_DATA_INO)
|
inode->i_ino == EXT2_ACL_DATA_INO)
|
return;
|
return;
|
inode->u.ext2_i.i_dtime = CURRENT_TIME;
|
inode->u.ext2_i.i_dtime = CURRENT_TIME;
|
inode->i_dirt = 1;
|
inode->i_dirt = 1;
|
ext2_update_inode(inode, IS_SYNC(inode));
|
ext2_update_inode(inode, IS_SYNC(inode));
|
inode->i_size = 0;
|
inode->i_size = 0;
|
if (inode->i_blocks)
|
if (inode->i_blocks)
|
ext2_truncate (inode);
|
ext2_truncate (inode);
|
ext2_free_inode (inode);
|
ext2_free_inode (inode);
|
}
|
}
|
|
|
#define inode_bmap(inode, nr) ((inode)->u.ext2_i.i_data[(nr)])
|
#define inode_bmap(inode, nr) ((inode)->u.ext2_i.i_data[(nr)])
|
|
|
static inline int block_bmap (struct buffer_head * bh, int nr)
|
static inline int block_bmap (struct buffer_head * bh, int nr)
|
{
|
{
|
int tmp;
|
int tmp;
|
|
|
if (!bh)
|
if (!bh)
|
return 0;
|
return 0;
|
tmp = swab32(((u32 *) bh->b_data)[nr]);
|
tmp = swab32(((u32 *) bh->b_data)[nr]);
|
brelse (bh);
|
brelse (bh);
|
return tmp;
|
return tmp;
|
}
|
}
|
|
|
/*
|
/*
|
* ext2_discard_prealloc and ext2_alloc_block are atomic wrt. the
|
* ext2_discard_prealloc and ext2_alloc_block are atomic wrt. the
|
* superblock in the same manner as are ext2_free_blocks and
|
* superblock in the same manner as are ext2_free_blocks and
|
* ext2_new_block. We just wait on the super rather than locking it
|
* ext2_new_block. We just wait on the super rather than locking it
|
* here, since ext2_new_block will do the necessary locking and we
|
* here, since ext2_new_block will do the necessary locking and we
|
* can't block until then.
|
* can't block until then.
|
*/
|
*/
|
void ext2_discard_prealloc (struct inode * inode)
|
void ext2_discard_prealloc (struct inode * inode)
|
{
|
{
|
#ifdef EXT2_PREALLOCATE
|
#ifdef EXT2_PREALLOCATE
|
unsigned short total;
|
unsigned short total;
|
|
|
if (inode->u.ext2_i.i_prealloc_count) {
|
if (inode->u.ext2_i.i_prealloc_count) {
|
total = inode->u.ext2_i.i_prealloc_count;
|
total = inode->u.ext2_i.i_prealloc_count;
|
inode->u.ext2_i.i_prealloc_count = 0;
|
inode->u.ext2_i.i_prealloc_count = 0;
|
ext2_free_blocks (inode, inode->u.ext2_i.i_prealloc_block, total);
|
ext2_free_blocks (inode, inode->u.ext2_i.i_prealloc_block, total);
|
}
|
}
|
#endif
|
#endif
|
}
|
}
|
|
|
static int ext2_alloc_block (struct inode * inode, unsigned long goal, int * err)
|
static int ext2_alloc_block (struct inode * inode, unsigned long goal, int * err)
|
{
|
{
|
#ifdef EXT2FS_DEBUG
|
#ifdef EXT2FS_DEBUG
|
static unsigned long alloc_hits = 0, alloc_attempts = 0;
|
static unsigned long alloc_hits = 0, alloc_attempts = 0;
|
#endif
|
#endif
|
unsigned long result;
|
unsigned long result;
|
struct buffer_head * bh;
|
struct buffer_head * bh;
|
|
|
wait_on_super (inode->i_sb);
|
wait_on_super (inode->i_sb);
|
|
|
#ifdef EXT2_PREALLOCATE
|
#ifdef EXT2_PREALLOCATE
|
if (inode->u.ext2_i.i_prealloc_count &&
|
if (inode->u.ext2_i.i_prealloc_count &&
|
(goal == inode->u.ext2_i.i_prealloc_block ||
|
(goal == inode->u.ext2_i.i_prealloc_block ||
|
goal + 1 == inode->u.ext2_i.i_prealloc_block))
|
goal + 1 == inode->u.ext2_i.i_prealloc_block))
|
{
|
{
|
result = inode->u.ext2_i.i_prealloc_block++;
|
result = inode->u.ext2_i.i_prealloc_block++;
|
inode->u.ext2_i.i_prealloc_count--;
|
inode->u.ext2_i.i_prealloc_count--;
|
ext2_debug ("preallocation hit (%lu/%lu).\n",
|
ext2_debug ("preallocation hit (%lu/%lu).\n",
|
++alloc_hits, ++alloc_attempts);
|
++alloc_hits, ++alloc_attempts);
|
|
|
/* It doesn't matter if we block in getblk() since
|
/* It doesn't matter if we block in getblk() since
|
we have already atomically allocated the block, and
|
we have already atomically allocated the block, and
|
are only clearing it now. */
|
are only clearing it now. */
|
if (!(bh = getblk (inode->i_sb->s_dev, result,
|
if (!(bh = getblk (inode->i_sb->s_dev, result,
|
inode->i_sb->s_blocksize))) {
|
inode->i_sb->s_blocksize))) {
|
ext2_error (inode->i_sb, "ext2_alloc_block",
|
ext2_error (inode->i_sb, "ext2_alloc_block",
|
"cannot get block %lu", result);
|
"cannot get block %lu", result);
|
return 0;
|
return 0;
|
}
|
}
|
memset(bh->b_data, 0, inode->i_sb->s_blocksize);
|
memset(bh->b_data, 0, inode->i_sb->s_blocksize);
|
mark_buffer_uptodate(bh, 1);
|
mark_buffer_uptodate(bh, 1);
|
mark_buffer_dirty(bh, 1);
|
mark_buffer_dirty(bh, 1);
|
brelse (bh);
|
brelse (bh);
|
} else {
|
} else {
|
ext2_discard_prealloc (inode);
|
ext2_discard_prealloc (inode);
|
ext2_debug ("preallocation miss (%lu/%lu).\n",
|
ext2_debug ("preallocation miss (%lu/%lu).\n",
|
alloc_hits, ++alloc_attempts);
|
alloc_hits, ++alloc_attempts);
|
if (S_ISREG(inode->i_mode))
|
if (S_ISREG(inode->i_mode))
|
result = ext2_new_block (inode, goal,
|
result = ext2_new_block (inode, goal,
|
&inode->u.ext2_i.i_prealloc_count,
|
&inode->u.ext2_i.i_prealloc_count,
|
&inode->u.ext2_i.i_prealloc_block, err);
|
&inode->u.ext2_i.i_prealloc_block, err);
|
else
|
else
|
result = ext2_new_block (inode, goal, 0, 0, err);
|
result = ext2_new_block (inode, goal, 0, 0, err);
|
}
|
}
|
#else
|
#else
|
result = ext2_new_block (inode, goal, 0, 0, err);
|
result = ext2_new_block (inode, goal, 0, 0, err);
|
#endif
|
#endif
|
|
|
return result;
|
return result;
|
}
|
}
|
|
|
|
|
int ext2_bmap (struct inode * inode, int block)
|
int ext2_bmap (struct inode * inode, int block)
|
{
|
{
|
int i;
|
int i;
|
int addr_per_block = EXT2_ADDR_PER_BLOCK(inode->i_sb);
|
int addr_per_block = EXT2_ADDR_PER_BLOCK(inode->i_sb);
|
int addr_per_block_bits = EXT2_ADDR_PER_BLOCK_BITS(inode->i_sb);
|
int addr_per_block_bits = EXT2_ADDR_PER_BLOCK_BITS(inode->i_sb);
|
|
|
if (block < 0) {
|
if (block < 0) {
|
ext2_warning (inode->i_sb, "ext2_bmap", "block < 0");
|
ext2_warning (inode->i_sb, "ext2_bmap", "block < 0");
|
return 0;
|
return 0;
|
}
|
}
|
if (block >= EXT2_NDIR_BLOCKS + addr_per_block +
|
if (block >= EXT2_NDIR_BLOCKS + addr_per_block +
|
(1 << (addr_per_block_bits * 2)) +
|
(1 << (addr_per_block_bits * 2)) +
|
((1 << (addr_per_block_bits * 2)) << addr_per_block_bits)) {
|
((1 << (addr_per_block_bits * 2)) << addr_per_block_bits)) {
|
ext2_warning (inode->i_sb, "ext2_bmap", "block > big");
|
ext2_warning (inode->i_sb, "ext2_bmap", "block > big");
|
return 0;
|
return 0;
|
}
|
}
|
if (block < EXT2_NDIR_BLOCKS)
|
if (block < EXT2_NDIR_BLOCKS)
|
return inode_bmap (inode, block);
|
return inode_bmap (inode, block);
|
block -= EXT2_NDIR_BLOCKS;
|
block -= EXT2_NDIR_BLOCKS;
|
if (block < addr_per_block) {
|
if (block < addr_per_block) {
|
i = inode_bmap (inode, EXT2_IND_BLOCK);
|
i = inode_bmap (inode, EXT2_IND_BLOCK);
|
if (!i)
|
if (!i)
|
return 0;
|
return 0;
|
return block_bmap (bread (inode->i_dev, i,
|
return block_bmap (bread (inode->i_dev, i,
|
inode->i_sb->s_blocksize), block);
|
inode->i_sb->s_blocksize), block);
|
}
|
}
|
block -= addr_per_block;
|
block -= addr_per_block;
|
if (block < (1 << (addr_per_block_bits * 2))) {
|
if (block < (1 << (addr_per_block_bits * 2))) {
|
i = inode_bmap (inode, EXT2_DIND_BLOCK);
|
i = inode_bmap (inode, EXT2_DIND_BLOCK);
|
if (!i)
|
if (!i)
|
return 0;
|
return 0;
|
i = block_bmap (bread (inode->i_dev, i,
|
i = block_bmap (bread (inode->i_dev, i,
|
inode->i_sb->s_blocksize),
|
inode->i_sb->s_blocksize),
|
block >> addr_per_block_bits);
|
block >> addr_per_block_bits);
|
if (!i)
|
if (!i)
|
return 0;
|
return 0;
|
return block_bmap (bread (inode->i_dev, i,
|
return block_bmap (bread (inode->i_dev, i,
|
inode->i_sb->s_blocksize),
|
inode->i_sb->s_blocksize),
|
block & (addr_per_block - 1));
|
block & (addr_per_block - 1));
|
}
|
}
|
block -= (1 << (addr_per_block_bits * 2));
|
block -= (1 << (addr_per_block_bits * 2));
|
i = inode_bmap (inode, EXT2_TIND_BLOCK);
|
i = inode_bmap (inode, EXT2_TIND_BLOCK);
|
if (!i)
|
if (!i)
|
return 0;
|
return 0;
|
i = block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
|
i = block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
|
block >> (addr_per_block_bits * 2));
|
block >> (addr_per_block_bits * 2));
|
if (!i)
|
if (!i)
|
return 0;
|
return 0;
|
i = block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
|
i = block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
|
(block >> addr_per_block_bits) & (addr_per_block - 1));
|
(block >> addr_per_block_bits) & (addr_per_block - 1));
|
if (!i)
|
if (!i)
|
return 0;
|
return 0;
|
return block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
|
return block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
|
block & (addr_per_block - 1));
|
block & (addr_per_block - 1));
|
}
|
}
|
|
|
static struct buffer_head * inode_getblk (struct inode * inode, int nr,
|
static struct buffer_head * inode_getblk (struct inode * inode, int nr,
|
int create, int new_block, int * err)
|
int create, int new_block, int * err)
|
{
|
{
|
u32 * p;
|
u32 * p;
|
int tmp, goal = 0;
|
int tmp, goal = 0;
|
struct buffer_head * result;
|
struct buffer_head * result;
|
int blocks = inode->i_sb->s_blocksize / 512;
|
int blocks = inode->i_sb->s_blocksize / 512;
|
|
|
p = inode->u.ext2_i.i_data + nr;
|
p = inode->u.ext2_i.i_data + nr;
|
repeat:
|
repeat:
|
tmp = *p;
|
tmp = *p;
|
if (tmp) {
|
if (tmp) {
|
result = getblk (inode->i_dev, tmp, inode->i_sb->s_blocksize);
|
result = getblk (inode->i_dev, tmp, inode->i_sb->s_blocksize);
|
if (tmp == *p)
|
if (tmp == *p)
|
return result;
|
return result;
|
brelse (result);
|
brelse (result);
|
goto repeat;
|
goto repeat;
|
}
|
}
|
if (!create || new_block >=
|
if (!create || new_block >=
|
(current->rlim[RLIMIT_FSIZE].rlim_cur >>
|
(current->rlim[RLIMIT_FSIZE].rlim_cur >>
|
EXT2_BLOCK_SIZE_BITS(inode->i_sb))) {
|
EXT2_BLOCK_SIZE_BITS(inode->i_sb))) {
|
*err = -EFBIG;
|
*err = -EFBIG;
|
return NULL;
|
return NULL;
|
}
|
}
|
if (inode->u.ext2_i.i_next_alloc_block == new_block)
|
if (inode->u.ext2_i.i_next_alloc_block == new_block)
|
goal = inode->u.ext2_i.i_next_alloc_goal;
|
goal = inode->u.ext2_i.i_next_alloc_goal;
|
|
|
ext2_debug ("hint = %d,", goal);
|
ext2_debug ("hint = %d,", goal);
|
|
|
if (!goal) {
|
if (!goal) {
|
for (tmp = nr - 1; tmp >= 0; tmp--) {
|
for (tmp = nr - 1; tmp >= 0; tmp--) {
|
if (inode->u.ext2_i.i_data[tmp]) {
|
if (inode->u.ext2_i.i_data[tmp]) {
|
goal = inode->u.ext2_i.i_data[tmp];
|
goal = inode->u.ext2_i.i_data[tmp];
|
break;
|
break;
|
}
|
}
|
}
|
}
|
if (!goal)
|
if (!goal)
|
goal = (inode->u.ext2_i.i_block_group *
|
goal = (inode->u.ext2_i.i_block_group *
|
EXT2_BLOCKS_PER_GROUP(inode->i_sb)) +
|
EXT2_BLOCKS_PER_GROUP(inode->i_sb)) +
|
swab32(inode->i_sb->u.ext2_sb.s_es->s_first_data_block);
|
swab32(inode->i_sb->u.ext2_sb.s_es->s_first_data_block);
|
}
|
}
|
|
|
ext2_debug ("goal = %d.\n", goal);
|
ext2_debug ("goal = %d.\n", goal);
|
|
|
tmp = ext2_alloc_block (inode, goal, err);
|
tmp = ext2_alloc_block (inode, goal, err);
|
if (!tmp)
|
if (!tmp)
|
return NULL;
|
return NULL;
|
result = getblk (inode->i_dev, tmp, inode->i_sb->s_blocksize);
|
result = getblk (inode->i_dev, tmp, inode->i_sb->s_blocksize);
|
if (*p) {
|
if (*p) {
|
ext2_free_blocks (inode, tmp, 1);
|
ext2_free_blocks (inode, tmp, 1);
|
brelse (result);
|
brelse (result);
|
goto repeat;
|
goto repeat;
|
}
|
}
|
*p = tmp;
|
*p = tmp;
|
inode->u.ext2_i.i_next_alloc_block = new_block;
|
inode->u.ext2_i.i_next_alloc_block = new_block;
|
inode->u.ext2_i.i_next_alloc_goal = tmp;
|
inode->u.ext2_i.i_next_alloc_goal = tmp;
|
inode->i_ctime = CURRENT_TIME;
|
inode->i_ctime = CURRENT_TIME;
|
inode->i_blocks += blocks;
|
inode->i_blocks += blocks;
|
if (IS_SYNC(inode) || inode->u.ext2_i.i_osync)
|
if (IS_SYNC(inode) || inode->u.ext2_i.i_osync)
|
ext2_sync_inode (inode);
|
ext2_sync_inode (inode);
|
else
|
else
|
inode->i_dirt = 1;
|
inode->i_dirt = 1;
|
return result;
|
return result;
|
}
|
}
|
|
|
static struct buffer_head * block_getblk (struct inode * inode,
|
static struct buffer_head * block_getblk (struct inode * inode,
|
struct buffer_head * bh, int nr,
|
struct buffer_head * bh, int nr,
|
int create, int blocksize,
|
int create, int blocksize,
|
int new_block, int * err)
|
int new_block, int * err)
|
{
|
{
|
int tmp, goal = 0;
|
int tmp, goal = 0;
|
u32 * p;
|
u32 * p;
|
struct buffer_head * result;
|
struct buffer_head * result;
|
int blocks = inode->i_sb->s_blocksize / 512;
|
int blocks = inode->i_sb->s_blocksize / 512;
|
|
|
if (!bh)
|
if (!bh)
|
return NULL;
|
return NULL;
|
if (!buffer_uptodate(bh)) {
|
if (!buffer_uptodate(bh)) {
|
ll_rw_block (READ, 1, &bh);
|
ll_rw_block (READ, 1, &bh);
|
wait_on_buffer (bh);
|
wait_on_buffer (bh);
|
if (!buffer_uptodate(bh)) {
|
if (!buffer_uptodate(bh)) {
|
brelse (bh);
|
brelse (bh);
|
return NULL;
|
return NULL;
|
}
|
}
|
}
|
}
|
p = (u32 *) bh->b_data + nr;
|
p = (u32 *) bh->b_data + nr;
|
repeat:
|
repeat:
|
tmp = swab32(*p);
|
tmp = swab32(*p);
|
if (tmp) {
|
if (tmp) {
|
result = getblk (bh->b_dev, tmp, blocksize);
|
result = getblk (bh->b_dev, tmp, blocksize);
|
if (tmp == swab32(*p)) {
|
if (tmp == swab32(*p)) {
|
brelse (bh);
|
brelse (bh);
|
return result;
|
return result;
|
}
|
}
|
brelse (result);
|
brelse (result);
|
goto repeat;
|
goto repeat;
|
}
|
}
|
if (!create || new_block >=
|
if (!create || new_block >=
|
(current->rlim[RLIMIT_FSIZE].rlim_cur >>
|
(current->rlim[RLIMIT_FSIZE].rlim_cur >>
|
EXT2_BLOCK_SIZE_BITS(inode->i_sb))) {
|
EXT2_BLOCK_SIZE_BITS(inode->i_sb))) {
|
brelse (bh);
|
brelse (bh);
|
*err = -EFBIG;
|
*err = -EFBIG;
|
return NULL;
|
return NULL;
|
}
|
}
|
if (inode->u.ext2_i.i_next_alloc_block == new_block)
|
if (inode->u.ext2_i.i_next_alloc_block == new_block)
|
goal = inode->u.ext2_i.i_next_alloc_goal;
|
goal = inode->u.ext2_i.i_next_alloc_goal;
|
if (!goal) {
|
if (!goal) {
|
for (tmp = nr - 1; tmp >= 0; tmp--) {
|
for (tmp = nr - 1; tmp >= 0; tmp--) {
|
if (swab32(((u32 *) bh->b_data)[tmp])) {
|
if (swab32(((u32 *) bh->b_data)[tmp])) {
|
goal = swab32(((u32 *)bh->b_data)[tmp]);
|
goal = swab32(((u32 *)bh->b_data)[tmp]);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
if (!goal)
|
if (!goal)
|
goal = bh->b_blocknr;
|
goal = bh->b_blocknr;
|
}
|
}
|
tmp = ext2_alloc_block (inode, goal, err);
|
tmp = ext2_alloc_block (inode, goal, err);
|
if (!tmp) {
|
if (!tmp) {
|
brelse (bh);
|
brelse (bh);
|
return NULL;
|
return NULL;
|
}
|
}
|
result = getblk (bh->b_dev, tmp, blocksize);
|
result = getblk (bh->b_dev, tmp, blocksize);
|
if (swab32(*p)) {
|
if (swab32(*p)) {
|
ext2_free_blocks (inode, tmp, 1);
|
ext2_free_blocks (inode, tmp, 1);
|
brelse (result);
|
brelse (result);
|
goto repeat;
|
goto repeat;
|
}
|
}
|
*p = swab32(tmp);
|
*p = swab32(tmp);
|
mark_buffer_dirty(bh, 1);
|
mark_buffer_dirty(bh, 1);
|
if (IS_SYNC(inode) || inode->u.ext2_i.i_osync) {
|
if (IS_SYNC(inode) || inode->u.ext2_i.i_osync) {
|
ll_rw_block (WRITE, 1, &bh);
|
ll_rw_block (WRITE, 1, &bh);
|
wait_on_buffer (bh);
|
wait_on_buffer (bh);
|
}
|
}
|
inode->i_ctime = CURRENT_TIME;
|
inode->i_ctime = CURRENT_TIME;
|
inode->i_blocks += blocks;
|
inode->i_blocks += blocks;
|
inode->i_dirt = 1;
|
inode->i_dirt = 1;
|
inode->u.ext2_i.i_next_alloc_block = new_block;
|
inode->u.ext2_i.i_next_alloc_block = new_block;
|
inode->u.ext2_i.i_next_alloc_goal = tmp;
|
inode->u.ext2_i.i_next_alloc_goal = tmp;
|
brelse (bh);
|
brelse (bh);
|
return result;
|
return result;
|
}
|
}
|
|
|
struct buffer_head * ext2_getblk (struct inode * inode, long block,
|
struct buffer_head * ext2_getblk (struct inode * inode, long block,
|
int create, int * err)
|
int create, int * err)
|
{
|
{
|
struct buffer_head * bh;
|
struct buffer_head * bh;
|
unsigned long b;
|
unsigned long b;
|
unsigned long addr_per_block = EXT2_ADDR_PER_BLOCK(inode->i_sb);
|
unsigned long addr_per_block = EXT2_ADDR_PER_BLOCK(inode->i_sb);
|
int addr_per_block_bits = EXT2_ADDR_PER_BLOCK_BITS(inode->i_sb);
|
int addr_per_block_bits = EXT2_ADDR_PER_BLOCK_BITS(inode->i_sb);
|
|
|
*err = -EIO;
|
*err = -EIO;
|
if (block < 0) {
|
if (block < 0) {
|
ext2_warning (inode->i_sb, "ext2_getblk", "block < 0");
|
ext2_warning (inode->i_sb, "ext2_getblk", "block < 0");
|
return NULL;
|
return NULL;
|
}
|
}
|
if (block > EXT2_NDIR_BLOCKS + addr_per_block +
|
if (block > EXT2_NDIR_BLOCKS + addr_per_block +
|
(1 << (addr_per_block_bits * 2)) +
|
(1 << (addr_per_block_bits * 2)) +
|
((1 << (addr_per_block_bits * 2)) << addr_per_block_bits)) {
|
((1 << (addr_per_block_bits * 2)) << addr_per_block_bits)) {
|
ext2_warning (inode->i_sb, "ext2_getblk", "block > big");
|
ext2_warning (inode->i_sb, "ext2_getblk", "block > big");
|
return NULL;
|
return NULL;
|
}
|
}
|
/*
|
/*
|
* If this is a sequential block allocation, set the next_alloc_block
|
* If this is a sequential block allocation, set the next_alloc_block
|
* to this block now so that all the indblock and data block
|
* to this block now so that all the indblock and data block
|
* allocations use the same goal zone
|
* allocations use the same goal zone
|
*/
|
*/
|
|
|
ext2_debug ("block %lu, next %lu, goal %lu.\n", block,
|
ext2_debug ("block %lu, next %lu, goal %lu.\n", block,
|
inode->u.ext2_i.i_next_alloc_block,
|
inode->u.ext2_i.i_next_alloc_block,
|
inode->u.ext2_i.i_next_alloc_goal);
|
inode->u.ext2_i.i_next_alloc_goal);
|
|
|
if (block == inode->u.ext2_i.i_next_alloc_block + 1) {
|
if (block == inode->u.ext2_i.i_next_alloc_block + 1) {
|
inode->u.ext2_i.i_next_alloc_block++;
|
inode->u.ext2_i.i_next_alloc_block++;
|
inode->u.ext2_i.i_next_alloc_goal++;
|
inode->u.ext2_i.i_next_alloc_goal++;
|
}
|
}
|
|
|
*err = -ENOSPC;
|
*err = -ENOSPC;
|
b = block;
|
b = block;
|
if (block < EXT2_NDIR_BLOCKS)
|
if (block < EXT2_NDIR_BLOCKS)
|
return inode_getblk (inode, block, create, b, err);
|
return inode_getblk (inode, block, create, b, err);
|
block -= EXT2_NDIR_BLOCKS;
|
block -= EXT2_NDIR_BLOCKS;
|
if (block < addr_per_block) {
|
if (block < addr_per_block) {
|
bh = inode_getblk (inode, EXT2_IND_BLOCK, create, b, err);
|
bh = inode_getblk (inode, EXT2_IND_BLOCK, create, b, err);
|
return block_getblk (inode, bh, block, create,
|
return block_getblk (inode, bh, block, create,
|
inode->i_sb->s_blocksize, b, err);
|
inode->i_sb->s_blocksize, b, err);
|
}
|
}
|
block -= addr_per_block;
|
block -= addr_per_block;
|
if (block < (1 << (addr_per_block_bits * 2))) {
|
if (block < (1 << (addr_per_block_bits * 2))) {
|
bh = inode_getblk (inode, EXT2_DIND_BLOCK, create, b, err);
|
bh = inode_getblk (inode, EXT2_DIND_BLOCK, create, b, err);
|
bh = block_getblk (inode, bh, block >> addr_per_block_bits,
|
bh = block_getblk (inode, bh, block >> addr_per_block_bits,
|
create, inode->i_sb->s_blocksize, b, err);
|
create, inode->i_sb->s_blocksize, b, err);
|
return block_getblk (inode, bh, block & (addr_per_block - 1),
|
return block_getblk (inode, bh, block & (addr_per_block - 1),
|
create, inode->i_sb->s_blocksize, b, err);
|
create, inode->i_sb->s_blocksize, b, err);
|
}
|
}
|
block -= (1 << (addr_per_block_bits * 2));
|
block -= (1 << (addr_per_block_bits * 2));
|
bh = inode_getblk (inode, EXT2_TIND_BLOCK, create, b, err);
|
bh = inode_getblk (inode, EXT2_TIND_BLOCK, create, b, err);
|
bh = block_getblk (inode, bh, block >> (addr_per_block_bits * 2),
|
bh = block_getblk (inode, bh, block >> (addr_per_block_bits * 2),
|
create, inode->i_sb->s_blocksize, b, err);
|
create, inode->i_sb->s_blocksize, b, err);
|
bh = block_getblk (inode, bh, (block >> addr_per_block_bits) & (addr_per_block - 1),
|
bh = block_getblk (inode, bh, (block >> addr_per_block_bits) & (addr_per_block - 1),
|
create, inode->i_sb->s_blocksize, b, err);
|
create, inode->i_sb->s_blocksize, b, err);
|
return block_getblk (inode, bh, block & (addr_per_block - 1), create,
|
return block_getblk (inode, bh, block & (addr_per_block - 1), create,
|
inode->i_sb->s_blocksize, b, err);
|
inode->i_sb->s_blocksize, b, err);
|
}
|
}
|
|
|
struct buffer_head * ext2_bread (struct inode * inode, int block,
|
struct buffer_head * ext2_bread (struct inode * inode, int block,
|
int create, int *err)
|
int create, int *err)
|
{
|
{
|
struct buffer_head * bh;
|
struct buffer_head * bh;
|
|
|
bh = ext2_getblk (inode, block, create, err);
|
bh = ext2_getblk (inode, block, create, err);
|
if (!bh || buffer_uptodate(bh))
|
if (!bh || buffer_uptodate(bh))
|
return bh;
|
return bh;
|
ll_rw_block (READ, 1, &bh);
|
ll_rw_block (READ, 1, &bh);
|
wait_on_buffer (bh);
|
wait_on_buffer (bh);
|
if (buffer_uptodate(bh))
|
if (buffer_uptodate(bh))
|
return bh;
|
return bh;
|
brelse (bh);
|
brelse (bh);
|
*err = -EIO;
|
*err = -EIO;
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
void ext2_read_inode (struct inode * inode)
|
void ext2_read_inode (struct inode * inode)
|
{
|
{
|
struct buffer_head * bh;
|
struct buffer_head * bh;
|
struct ext2_inode * raw_inode;
|
struct ext2_inode * raw_inode;
|
unsigned long block_group;
|
unsigned long block_group;
|
unsigned long group_desc;
|
unsigned long group_desc;
|
unsigned long desc;
|
unsigned long desc;
|
unsigned long block;
|
unsigned long block;
|
unsigned long offset;
|
unsigned long offset;
|
struct ext2_group_desc * gdp;
|
struct ext2_group_desc * gdp;
|
|
|
if ((inode->i_ino != EXT2_ROOT_INO && inode->i_ino != EXT2_ACL_IDX_INO &&
|
if ((inode->i_ino != EXT2_ROOT_INO && inode->i_ino != EXT2_ACL_IDX_INO &&
|
inode->i_ino != EXT2_ACL_DATA_INO &&
|
inode->i_ino != EXT2_ACL_DATA_INO &&
|
inode->i_ino < EXT2_FIRST_INO(inode->i_sb)) ||
|
inode->i_ino < EXT2_FIRST_INO(inode->i_sb)) ||
|
inode->i_ino > swab32(inode->i_sb->u.ext2_sb.s_es->s_inodes_count)) {
|
inode->i_ino > swab32(inode->i_sb->u.ext2_sb.s_es->s_inodes_count)) {
|
ext2_error (inode->i_sb, "ext2_read_inode",
|
ext2_error (inode->i_sb, "ext2_read_inode",
|
"bad inode number: %lu", inode->i_ino);
|
"bad inode number: %lu", inode->i_ino);
|
return;
|
return;
|
}
|
}
|
block_group = (inode->i_ino - 1) / EXT2_INODES_PER_GROUP(inode->i_sb);
|
block_group = (inode->i_ino - 1) / EXT2_INODES_PER_GROUP(inode->i_sb);
|
if (block_group >= inode->i_sb->u.ext2_sb.s_groups_count)
|
if (block_group >= inode->i_sb->u.ext2_sb.s_groups_count)
|
ext2_panic (inode->i_sb, "ext2_read_inode",
|
ext2_panic (inode->i_sb, "ext2_read_inode",
|
"group >= groups count");
|
"group >= groups count");
|
group_desc = block_group >> EXT2_DESC_PER_BLOCK_BITS(inode->i_sb);
|
group_desc = block_group >> EXT2_DESC_PER_BLOCK_BITS(inode->i_sb);
|
desc = block_group & (EXT2_DESC_PER_BLOCK(inode->i_sb) - 1);
|
desc = block_group & (EXT2_DESC_PER_BLOCK(inode->i_sb) - 1);
|
bh = inode->i_sb->u.ext2_sb.s_group_desc[group_desc];
|
bh = inode->i_sb->u.ext2_sb.s_group_desc[group_desc];
|
if (!bh) {
|
if (!bh) {
|
ext2_error (inode->i_sb, "ext2_read_inode",
|
ext2_error (inode->i_sb, "ext2_read_inode",
|
"Descriptor not loaded");
|
"Descriptor not loaded");
|
goto bad_inode;
|
goto bad_inode;
|
}
|
}
|
|
|
gdp = (struct ext2_group_desc *) bh->b_data;
|
gdp = (struct ext2_group_desc *) bh->b_data;
|
/*
|
/*
|
* Figure out the offset within the block group inode table
|
* Figure out the offset within the block group inode table
|
*/
|
*/
|
offset = ((inode->i_ino - 1) % EXT2_INODES_PER_GROUP(inode->i_sb)) *
|
offset = ((inode->i_ino - 1) % EXT2_INODES_PER_GROUP(inode->i_sb)) *
|
EXT2_INODE_SIZE(inode->i_sb);
|
EXT2_INODE_SIZE(inode->i_sb);
|
block = swab32(gdp[desc].bg_inode_table) +
|
block = swab32(gdp[desc].bg_inode_table) +
|
(offset >> EXT2_BLOCK_SIZE_BITS(inode->i_sb));
|
(offset >> EXT2_BLOCK_SIZE_BITS(inode->i_sb));
|
if (!(bh = bread (inode->i_dev, block, inode->i_sb->s_blocksize))) {
|
if (!(bh = bread (inode->i_dev, block, inode->i_sb->s_blocksize))) {
|
ext2_error (inode->i_sb, "ext2_read_inode",
|
ext2_error (inode->i_sb, "ext2_read_inode",
|
"unable to read i-node block - "
|
"unable to read i-node block - "
|
"inode=%lu, block=%lu", inode->i_ino, block);
|
"inode=%lu, block=%lu", inode->i_ino, block);
|
goto bad_inode;
|
goto bad_inode;
|
}
|
}
|
|
|
offset &= (EXT2_BLOCK_SIZE(inode->i_sb) - 1);
|
offset &= (EXT2_BLOCK_SIZE(inode->i_sb) - 1);
|
raw_inode = (struct ext2_inode *) (bh->b_data + offset);
|
raw_inode = (struct ext2_inode *) (bh->b_data + offset);
|
|
|
inode->i_mode = swab16(raw_inode->i_mode);
|
inode->i_mode = swab16(raw_inode->i_mode);
|
inode->i_uid = swab16(raw_inode->i_uid);
|
inode->i_uid = swab16(raw_inode->i_uid);
|
inode->i_gid = swab16(raw_inode->i_gid);
|
inode->i_gid = swab16(raw_inode->i_gid);
|
inode->i_nlink = swab16(raw_inode->i_links_count);
|
inode->i_nlink = swab16(raw_inode->i_links_count);
|
inode->i_size = swab32(raw_inode->i_size);
|
inode->i_size = swab32(raw_inode->i_size);
|
inode->i_atime = swab32(raw_inode->i_atime);
|
inode->i_atime = swab32(raw_inode->i_atime);
|
inode->i_ctime = swab32(raw_inode->i_ctime);
|
inode->i_ctime = swab32(raw_inode->i_ctime);
|
inode->i_mtime = swab32(raw_inode->i_mtime);
|
inode->i_mtime = swab32(raw_inode->i_mtime);
|
inode->u.ext2_i.i_dtime = swab32(raw_inode->i_dtime);
|
inode->u.ext2_i.i_dtime = swab32(raw_inode->i_dtime);
|
inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat), not the fs block size */
|
inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat), not the fs block size */
|
inode->i_blocks = swab32(raw_inode->i_blocks);
|
inode->i_blocks = swab32(raw_inode->i_blocks);
|
inode->i_version = ++event;
|
inode->i_version = ++event;
|
inode->u.ext2_i.i_new_inode = 0;
|
inode->u.ext2_i.i_new_inode = 0;
|
inode->u.ext2_i.i_flags = swab32(raw_inode->i_flags);
|
inode->u.ext2_i.i_flags = swab32(raw_inode->i_flags);
|
inode->u.ext2_i.i_faddr = swab32(raw_inode->i_faddr);
|
inode->u.ext2_i.i_faddr = swab32(raw_inode->i_faddr);
|
inode->u.ext2_i.i_frag_no = raw_inode->i_frag;
|
inode->u.ext2_i.i_frag_no = raw_inode->i_frag;
|
inode->u.ext2_i.i_frag_size = raw_inode->i_fsize;
|
inode->u.ext2_i.i_frag_size = raw_inode->i_fsize;
|
inode->u.ext2_i.i_osync = 0;
|
inode->u.ext2_i.i_osync = 0;
|
inode->u.ext2_i.i_file_acl = swab32(raw_inode->i_file_acl);
|
inode->u.ext2_i.i_file_acl = swab32(raw_inode->i_file_acl);
|
inode->u.ext2_i.i_dir_acl = swab32(raw_inode->i_dir_acl);
|
inode->u.ext2_i.i_dir_acl = swab32(raw_inode->i_dir_acl);
|
inode->u.ext2_i.i_version = swab32(raw_inode->i_version);
|
inode->u.ext2_i.i_version = swab32(raw_inode->i_version);
|
inode->u.ext2_i.i_block_group = block_group;
|
inode->u.ext2_i.i_block_group = block_group;
|
inode->u.ext2_i.i_next_alloc_block = 0;
|
inode->u.ext2_i.i_next_alloc_block = 0;
|
inode->u.ext2_i.i_next_alloc_goal = 0;
|
inode->u.ext2_i.i_next_alloc_goal = 0;
|
if (inode->u.ext2_i.i_prealloc_count)
|
if (inode->u.ext2_i.i_prealloc_count)
|
ext2_error (inode->i_sb, "ext2_read_inode",
|
ext2_error (inode->i_sb, "ext2_read_inode",
|
"New inode has non-zero prealloc count!");
|
"New inode has non-zero prealloc count!");
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
|
inode->i_rdev = to_kdev_t(swab32(raw_inode->i_block[0]));
|
inode->i_rdev = to_kdev_t(swab32(raw_inode->i_block[0]));
|
else if (S_ISLNK(inode->i_mode) && !inode->i_blocks)
|
else if (S_ISLNK(inode->i_mode) && !inode->i_blocks)
|
for (block = 0; block < EXT2_N_BLOCKS; block++)
|
for (block = 0; block < EXT2_N_BLOCKS; block++)
|
inode->u.ext2_i.i_data[block] = raw_inode->i_block[block];
|
inode->u.ext2_i.i_data[block] = raw_inode->i_block[block];
|
else for (block = 0; block < EXT2_N_BLOCKS; block++)
|
else for (block = 0; block < EXT2_N_BLOCKS; block++)
|
inode->u.ext2_i.i_data[block] = swab32(raw_inode->i_block[block]);
|
inode->u.ext2_i.i_data[block] = swab32(raw_inode->i_block[block]);
|
brelse (bh);
|
brelse (bh);
|
inode->i_op = NULL;
|
inode->i_op = NULL;
|
if (inode->i_ino == EXT2_ACL_IDX_INO ||
|
if (inode->i_ino == EXT2_ACL_IDX_INO ||
|
inode->i_ino == EXT2_ACL_DATA_INO)
|
inode->i_ino == EXT2_ACL_DATA_INO)
|
/* Nothing to do */ ;
|
/* Nothing to do */ ;
|
else if (S_ISREG(inode->i_mode))
|
else if (S_ISREG(inode->i_mode))
|
inode->i_op = &ext2_file_inode_operations;
|
inode->i_op = &ext2_file_inode_operations;
|
else if (S_ISDIR(inode->i_mode))
|
else if (S_ISDIR(inode->i_mode))
|
inode->i_op = &ext2_dir_inode_operations;
|
inode->i_op = &ext2_dir_inode_operations;
|
else if (S_ISLNK(inode->i_mode))
|
else if (S_ISLNK(inode->i_mode))
|
inode->i_op = &ext2_symlink_inode_operations;
|
inode->i_op = &ext2_symlink_inode_operations;
|
else if (S_ISCHR(inode->i_mode))
|
else if (S_ISCHR(inode->i_mode))
|
inode->i_op = &chrdev_inode_operations;
|
inode->i_op = &chrdev_inode_operations;
|
else if (S_ISBLK(inode->i_mode))
|
else if (S_ISBLK(inode->i_mode))
|
inode->i_op = &blkdev_inode_operations;
|
inode->i_op = &blkdev_inode_operations;
|
else if (S_ISFIFO(inode->i_mode))
|
else if (S_ISFIFO(inode->i_mode))
|
init_fifo(inode);
|
init_fifo(inode);
|
if (inode->u.ext2_i.i_flags & EXT2_SYNC_FL)
|
if (inode->u.ext2_i.i_flags & EXT2_SYNC_FL)
|
inode->i_flags |= MS_SYNCHRONOUS;
|
inode->i_flags |= MS_SYNCHRONOUS;
|
if (inode->u.ext2_i.i_flags & EXT2_APPEND_FL)
|
if (inode->u.ext2_i.i_flags & EXT2_APPEND_FL)
|
inode->i_flags |= S_APPEND;
|
inode->i_flags |= S_APPEND;
|
if (inode->u.ext2_i.i_flags & EXT2_IMMUTABLE_FL)
|
if (inode->u.ext2_i.i_flags & EXT2_IMMUTABLE_FL)
|
inode->i_flags |= S_IMMUTABLE;
|
inode->i_flags |= S_IMMUTABLE;
|
if (inode->u.ext2_i.i_flags & EXT2_NOATIME_FL)
|
if (inode->u.ext2_i.i_flags & EXT2_NOATIME_FL)
|
inode->i_flags |= MS_NOATIME;
|
inode->i_flags |= MS_NOATIME;
|
return;
|
return;
|
|
|
bad_inode:
|
bad_inode:
|
make_bad_inode(inode);
|
make_bad_inode(inode);
|
return;
|
return;
|
}
|
}
|
|
|
static int ext2_update_inode(struct inode * inode, int do_sync)
|
static int ext2_update_inode(struct inode * inode, int do_sync)
|
{
|
{
|
struct buffer_head * bh;
|
struct buffer_head * bh;
|
struct ext2_inode * raw_inode;
|
struct ext2_inode * raw_inode;
|
unsigned long block_group;
|
unsigned long block_group;
|
unsigned long group_desc;
|
unsigned long group_desc;
|
unsigned long desc;
|
unsigned long desc;
|
unsigned long block;
|
unsigned long block;
|
unsigned long offset;
|
unsigned long offset;
|
int err = 0;
|
int err = 0;
|
struct ext2_group_desc * gdp;
|
struct ext2_group_desc * gdp;
|
|
|
if ((inode->i_ino != EXT2_ROOT_INO &&
|
if ((inode->i_ino != EXT2_ROOT_INO &&
|
inode->i_ino < EXT2_FIRST_INO(inode->i_sb)) ||
|
inode->i_ino < EXT2_FIRST_INO(inode->i_sb)) ||
|
inode->i_ino > swab32(inode->i_sb->u.ext2_sb.s_es->s_inodes_count)) {
|
inode->i_ino > swab32(inode->i_sb->u.ext2_sb.s_es->s_inodes_count)) {
|
ext2_error (inode->i_sb, "ext2_write_inode",
|
ext2_error (inode->i_sb, "ext2_write_inode",
|
"bad inode number: %lu", inode->i_ino);
|
"bad inode number: %lu", inode->i_ino);
|
return 0;
|
return 0;
|
}
|
}
|
block_group = (inode->i_ino - 1) / EXT2_INODES_PER_GROUP(inode->i_sb);
|
block_group = (inode->i_ino - 1) / EXT2_INODES_PER_GROUP(inode->i_sb);
|
if (block_group >= inode->i_sb->u.ext2_sb.s_groups_count)
|
if (block_group >= inode->i_sb->u.ext2_sb.s_groups_count)
|
ext2_panic (inode->i_sb, "ext2_write_inode",
|
ext2_panic (inode->i_sb, "ext2_write_inode",
|
"group >= groups count");
|
"group >= groups count");
|
group_desc = block_group >> EXT2_DESC_PER_BLOCK_BITS(inode->i_sb);
|
group_desc = block_group >> EXT2_DESC_PER_BLOCK_BITS(inode->i_sb);
|
desc = block_group & (EXT2_DESC_PER_BLOCK(inode->i_sb) - 1);
|
desc = block_group & (EXT2_DESC_PER_BLOCK(inode->i_sb) - 1);
|
bh = inode->i_sb->u.ext2_sb.s_group_desc[group_desc];
|
bh = inode->i_sb->u.ext2_sb.s_group_desc[group_desc];
|
if (!bh)
|
if (!bh)
|
ext2_panic (inode->i_sb, "ext2_write_inode",
|
ext2_panic (inode->i_sb, "ext2_write_inode",
|
"Descriptor not loaded");
|
"Descriptor not loaded");
|
gdp = (struct ext2_group_desc *) bh->b_data;
|
gdp = (struct ext2_group_desc *) bh->b_data;
|
/*
|
/*
|
* Figure out the offset within the block group inode table
|
* Figure out the offset within the block group inode table
|
*/
|
*/
|
offset = ((inode->i_ino - 1) % EXT2_INODES_PER_GROUP(inode->i_sb)) *
|
offset = ((inode->i_ino - 1) % EXT2_INODES_PER_GROUP(inode->i_sb)) *
|
EXT2_INODE_SIZE(inode->i_sb);
|
EXT2_INODE_SIZE(inode->i_sb);
|
block = swab32(gdp[desc].bg_inode_table) +
|
block = swab32(gdp[desc].bg_inode_table) +
|
(offset >> EXT2_BLOCK_SIZE_BITS(inode->i_sb));
|
(offset >> EXT2_BLOCK_SIZE_BITS(inode->i_sb));
|
if (!(bh = bread (inode->i_dev, block, inode->i_sb->s_blocksize))) {
|
if (!(bh = bread (inode->i_dev, block, inode->i_sb->s_blocksize))) {
|
ext2_error (inode->i_sb, "ext2_write_inode",
|
ext2_error (inode->i_sb, "ext2_write_inode",
|
"unable to read i-node block - "
|
"unable to read i-node block - "
|
"inode=%lu, block=%lu", inode->i_ino, block);
|
"inode=%lu, block=%lu", inode->i_ino, block);
|
/*
|
/*
|
* Unfortunately we're in a lose-lose situation. I think that
|
* Unfortunately we're in a lose-lose situation. I think that
|
* keeping the inode in-core with the dirty bit set is
|
* keeping the inode in-core with the dirty bit set is
|
* the worse option, since that will soak up inodes until
|
* the worse option, since that will soak up inodes until
|
* the end of the world. Clearing the dirty bit is nasty if
|
* the end of the world. Clearing the dirty bit is nasty if
|
* we haven't succeeded in writing out, but it's less nasty
|
* we haven't succeeded in writing out, but it's less nasty
|
* than the alternative. -- sct
|
* than the alternative. -- sct
|
*/
|
*/
|
inode->i_dirt = 0;
|
inode->i_dirt = 0;
|
|
|
return -EIO;
|
return -EIO;
|
}
|
}
|
|
|
offset &= EXT2_BLOCK_SIZE(inode->i_sb) - 1;
|
offset &= EXT2_BLOCK_SIZE(inode->i_sb) - 1;
|
raw_inode = (struct ext2_inode *) (bh->b_data + offset);
|
raw_inode = (struct ext2_inode *) (bh->b_data + offset);
|
|
|
raw_inode->i_mode = swab16(inode->i_mode);
|
raw_inode->i_mode = swab16(inode->i_mode);
|
raw_inode->i_uid = swab16(inode->i_uid);
|
raw_inode->i_uid = swab16(inode->i_uid);
|
raw_inode->i_gid = swab16(inode->i_gid);
|
raw_inode->i_gid = swab16(inode->i_gid);
|
raw_inode->i_links_count = swab16(inode->i_nlink);
|
raw_inode->i_links_count = swab16(inode->i_nlink);
|
raw_inode->i_size = swab32(inode->i_size);
|
raw_inode->i_size = swab32(inode->i_size);
|
raw_inode->i_atime = swab32(inode->i_atime);
|
raw_inode->i_atime = swab32(inode->i_atime);
|
raw_inode->i_ctime = swab32(inode->i_ctime);
|
raw_inode->i_ctime = swab32(inode->i_ctime);
|
raw_inode->i_mtime = swab32(inode->i_mtime);
|
raw_inode->i_mtime = swab32(inode->i_mtime);
|
raw_inode->i_blocks = swab32(inode->i_blocks);
|
raw_inode->i_blocks = swab32(inode->i_blocks);
|
raw_inode->i_dtime = swab32(inode->u.ext2_i.i_dtime);
|
raw_inode->i_dtime = swab32(inode->u.ext2_i.i_dtime);
|
raw_inode->i_flags = swab32(inode->u.ext2_i.i_flags);
|
raw_inode->i_flags = swab32(inode->u.ext2_i.i_flags);
|
raw_inode->i_faddr = swab32(inode->u.ext2_i.i_faddr);
|
raw_inode->i_faddr = swab32(inode->u.ext2_i.i_faddr);
|
raw_inode->i_frag = inode->u.ext2_i.i_frag_no;
|
raw_inode->i_frag = inode->u.ext2_i.i_frag_no;
|
raw_inode->i_fsize = inode->u.ext2_i.i_frag_size;
|
raw_inode->i_fsize = inode->u.ext2_i.i_frag_size;
|
raw_inode->i_file_acl = swab32(inode->u.ext2_i.i_file_acl);
|
raw_inode->i_file_acl = swab32(inode->u.ext2_i.i_file_acl);
|
raw_inode->i_dir_acl = swab32(inode->u.ext2_i.i_dir_acl);
|
raw_inode->i_dir_acl = swab32(inode->u.ext2_i.i_dir_acl);
|
raw_inode->i_version = swab32(inode->u.ext2_i.i_version);
|
raw_inode->i_version = swab32(inode->u.ext2_i.i_version);
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
|
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
|
raw_inode->i_block[0] = swab32(kdev_t_to_nr(inode->i_rdev));
|
raw_inode->i_block[0] = swab32(kdev_t_to_nr(inode->i_rdev));
|
else if (S_ISLNK(inode->i_mode) && !inode->i_blocks)
|
else if (S_ISLNK(inode->i_mode) && !inode->i_blocks)
|
for (block = 0; block < EXT2_N_BLOCKS; block++)
|
for (block = 0; block < EXT2_N_BLOCKS; block++)
|
raw_inode->i_block[block] = inode->u.ext2_i.i_data[block];
|
raw_inode->i_block[block] = inode->u.ext2_i.i_data[block];
|
else for (block = 0; block < EXT2_N_BLOCKS; block++)
|
else for (block = 0; block < EXT2_N_BLOCKS; block++)
|
raw_inode->i_block[block] = swab32(inode->u.ext2_i.i_data[block]);
|
raw_inode->i_block[block] = swab32(inode->u.ext2_i.i_data[block]);
|
mark_buffer_dirty(bh, 1);
|
mark_buffer_dirty(bh, 1);
|
inode->i_dirt = 0;
|
inode->i_dirt = 0;
|
if (do_sync) {
|
if (do_sync) {
|
ll_rw_block (WRITE, 1, &bh);
|
ll_rw_block (WRITE, 1, &bh);
|
wait_on_buffer (bh);
|
wait_on_buffer (bh);
|
if (buffer_req(bh) && !buffer_uptodate(bh)) {
|
if (buffer_req(bh) && !buffer_uptodate(bh)) {
|
ext2_error (inode->i_sb,
|
ext2_error (inode->i_sb,
|
"IO error syncing ext2 inode ["
|
"IO error syncing ext2 inode ["
|
"%s:%08lx]\n",
|
"%s:%08lx]\n",
|
kdevname(inode->i_dev), inode->i_ino);
|
kdevname(inode->i_dev), inode->i_ino);
|
err = -EIO;
|
err = -EIO;
|
}
|
}
|
}
|
}
|
brelse (bh);
|
brelse (bh);
|
return err;
|
return err;
|
}
|
}
|
|
|
void ext2_write_inode (struct inode * inode)
|
void ext2_write_inode (struct inode * inode)
|
{
|
{
|
ext2_update_inode (inode, 0);
|
ext2_update_inode (inode, 0);
|
}
|
}
|
|
|
int ext2_sync_inode (struct inode *inode)
|
int ext2_sync_inode (struct inode *inode)
|
{
|
{
|
return ext2_update_inode (inode, 1);
|
return ext2_update_inode (inode, 1);
|
}
|
}
|
|
|
|
|
