/*
* linux/fs/ext2/inode.c
*
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card (card@masi.ibp.fr)
* Laboratoire MASI - Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* from
*
* linux/fs/minix/inode.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* Goal-directed block allocation by Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
*/
#include <asm/segment.h>
#include <asm/system.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ext2_fs.h>
#include <linux/sched.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/locks.h>
#include <linux/mm.h>
static int ext2_update_inode(struct inode * inode, int do_sync);
void ext2_put_inode (struct inode * inode)
{
ext2_discard_prealloc (inode);
if (inode->i_nlink || inode->i_ino == EXT2_ACL_IDX_INO ||
inode->i_ino == EXT2_ACL_DATA_INO)
return;
inode->u.ext2_i.i_dtime = CURRENT_TIME;
inode->i_dirt = 1;
ext2_update_inode(inode, IS_SYNC(inode));
inode->i_size = 0;
if (inode->i_blocks)
ext2_truncate (inode);
ext2_free_inode (inode);
}
#define inode_bmap(inode, nr) ((inode)->u.ext2_i.i_data[(nr)])
static inline int block_bmap (struct buffer_head * bh, int nr)
{
int tmp;
if (!bh)
return 0;
tmp = ((u32 *) bh->b_data)[nr];
brelse (bh);
return tmp;
}
/*
* ext2_discard_prealloc and ext2_alloc_block are atomic wrt. the
* superblock in the same manner as are ext2_free_blocks and
* 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
* can't block until then.
*/
void ext2_discard_prealloc (struct inode * inode)
{
#ifdef EXT2_PREALLOCATE
unsigned short total;
if (inode->u.ext2_i.i_prealloc_count) {
total = inode->u.ext2_i.i_prealloc_count;
inode->u.ext2_i.i_prealloc_count = 0;
ext2_free_blocks (inode, inode->u.ext2_i.i_prealloc_block, total);
}
#endif
}
static int ext2_alloc_block (struct inode * inode, unsigned long goal, int * err)
{
#ifdef EXT2FS_DEBUG
static unsigned long alloc_hits = 0, alloc_attempts = 0;
#endif
unsigned long result;
struct buffer_head * bh;
wait_on_super (inode->i_sb);
#ifdef EXT2_PREALLOCATE
if (inode->u.ext2_i.i_prealloc_count &&
(goal == inode->u.ext2_i.i_prealloc_block ||
goal + 1 == inode->u.ext2_i.i_prealloc_block))
{
result = inode->u.ext2_i.i_prealloc_block++;
inode->u.ext2_i.i_prealloc_count--;
ext2_debug ("preallocation hit (%lu/%lu).\n",
++alloc_hits, ++alloc_attempts);
/* It doesn't matter if we block in getblk() since
we have already atomically allocated the block, and
are only clearing it now. */
if (!(bh = getblk (inode->i_sb->s_dev, result,
inode->i_sb->s_blocksize))) {
ext2_error (inode->i_sb, "ext2_alloc_block",
"cannot get block %lu", result);
return 0;
}
memset(bh->b_data, 0, inode->i_sb->s_blocksize);
mark_buffer_uptodate(bh, 1);
mark_buffer_dirty(bh, 1);
brelse (bh);
} else {
ext2_discard_prealloc (inode);
ext2_debug ("preallocation miss (%lu/%lu).\n",
alloc_hits, ++alloc_attempts);
if (S_ISREG(inode->i_mode))
result = ext2_new_block (inode, goal,
&inode->u.ext2_i.i_prealloc_count,
&inode->u.ext2_i.i_prealloc_block, err);
else
result = ext2_new_block (inode, goal, 0, 0, err);
}
#else
result = ext2_new_block (inode, goal, 0, 0, err);
#endif
return result;
}
int ext2_bmap (struct inode * inode, int block)
{
int i;
int addr_per_block = EXT2_ADDR_PER_BLOCK(inode->i_sb);
int addr_per_block_bits = EXT2_ADDR_PER_BLOCK_BITS(inode->i_sb);
if (block < 0) {
ext2_warning (inode->i_sb, "ext2_bmap", "block < 0");
return 0;
}
if (block >= EXT2_NDIR_BLOCKS + addr_per_block +
(1 << (addr_per_block_bits * 2)) +
((1 << (addr_per_block_bits * 2)) << addr_per_block_bits)) {
ext2_warning (inode->i_sb, "ext2_bmap", "block > big");
return 0;
}
if (block < EXT2_NDIR_BLOCKS)
return inode_bmap (inode, block);
block -= EXT2_NDIR_BLOCKS;
if (block < addr_per_block) {
i = inode_bmap (inode, EXT2_IND_BLOCK);
if (!i)
return 0;
return block_bmap (bread (inode->i_dev, i,
inode->i_sb->s_blocksize), block);
}
block -= addr_per_block;
if (block < (1 << (addr_per_block_bits * 2))) {
i = inode_bmap (inode, EXT2_DIND_BLOCK);
if (!i)
return 0;
i = block_bmap (bread (inode->i_dev, i,
inode->i_sb->s_blocksize),
block >> addr_per_block_bits);
if (!i)
return 0;
return block_bmap (bread (inode->i_dev, i,
inode->i_sb->s_blocksize),
block & (addr_per_block - 1));
}
block -= (1 << (addr_per_block_bits * 2));
i = inode_bmap (inode, EXT2_TIND_BLOCK);
if (!i)
return 0;
i = block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
block >> (addr_per_block_bits * 2));
if (!i)
return 0;
i = block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
(block >> addr_per_block_bits) & (addr_per_block - 1));
if (!i)
return 0;
return block_bmap (bread (inode->i_dev, i, inode->i_sb->s_blocksize),
block & (addr_per_block - 1));
}
static struct buffer_head * inode_getblk (struct inode * inode, int nr,
int create, int new_block, int * err)
{
u32 * p;
int tmp, goal = 0;
struct buffer_head * result;
int blocks = inode->i_sb->s_blocksize / 512;
p = inode->u.ext2_i.i_data + nr;
repeat:
tmp = *p;
if (tmp) {
result = getblk (inode->i_dev, tmp, inode->i_sb->s_blocksize);
if (tmp == *p)
return result;
brelse (result);
goto repeat;
}
if (!create || new_block >=
(current->rlim[RLIMIT_FSIZE].rlim_cur >>
EXT2_BLOCK_SIZE_BITS(inode->i_sb))) {
*err = -EFBIG;
return NULL;
}
if (inode->u.ext2_i.i_next_alloc_block == new_block)
goal = inode->u.ext2_i.i_next_alloc_goal;
ext2_debug ("hint = %d,", goal);
if (!goal) {
for (tmp = nr - 1; tmp >= 0; tmp--) {
if (inode->u.ext2_i.i_data[tmp]) {
goal = inode->u.ext2_i.i_data[tmp];
break;
}
}
if (!goal)
goal = (inode->u.ext2_i.i_block_group *
EXT2_BLOCKS_PER_GROUP(inode->i_sb)) +
inode->i_sb->u.ext2_sb.s_es->s_first_data_block;
}
ext2_debug ("goal = %d.\n", goal);
tmp = ext2_alloc_block (inode, goal, err);
if (!tmp)
return NULL;
result = getblk (inode->i_dev, tmp, inode->i_sb->s_blocksize);
if (*p) {
ext2_free_blocks (inode, tmp, 1);
brelse (result);
goto repeat;
}
*p = tmp;
inode->u.ext2_i.i_next_alloc_block = new_block;
inode->u.ext2_i.i_next_alloc_goal = tmp;
inode->i_ctime = CURRENT_TIME;
inode->i_blocks += blocks;
if (IS_SYNC(inode) || inode->u.ext2_i.i_osync)
ext2_sync_inode (inode);
else
inode->i_dirt = 1;
return result;
}
static struct buffer_head * block_getblk (struct inode * inode,
struct buffer_head * bh, int nr,
int create, int blocksize,
int new_block, int * err)
{
int tmp, goal = 0;
u32 * p;
struct buffer_head * result;
int blocks = inode->i_sb->s_blocksize / 512;
if (!bh)
return NULL;
if (!buffer_uptodate(bh)) {
ll_rw_block (READ, 1, &bh);
wait_on_buffer (bh);
if (!buffer_uptodate(bh)) {
brelse (bh);
return NULL;
}
}
p = (u32 *) bh->b_data + nr;
repeat:
tmp = *p;
if (tmp) {
result = getblk (bh->b_dev, tmp, blocksize);
if (tmp == *p) {
brelse (bh);
return result;
}
brelse (result);
goto repeat;
}
if (!create || new_block >=
(current->rlim[RLIMIT_FSIZE].rlim_cur >>
EXT2_BLOCK_SIZE_BITS(inode->i_sb))) {
brelse (bh);
*err = -EFBIG;
return NULL;
}
if (inode->u.ext2_i.i_next_alloc_block == new_block)
goal = inode->u.ext2_i.i_next_alloc_goal;
if (!goal) {
for (tmp = nr - 1; tmp >= 0; tmp--) {
if (((u32 *) bh->b_data)[tmp]) {
goal = ((u32 *)bh->b_data)[tmp];
break;
}
}
if (!goal)
goal = bh->b_blocknr;
}
tmp = ext2_alloc_block (inode, goal, err);
if (!tmp) {
brelse (bh);
return NULL;
}
result = getblk (bh->b_dev, tmp, blocksize);
if (*p) {
ext2_free_blocks (inode, tmp, 1);
brelse (result);
goto repeat;
}
*p = tmp;
mark_buffer_dirty(bh, 1);
if (IS_SYNC(inode) || inode->u.ext2_i.i_osync) {
ll_rw_block (WRITE, 1, &bh);
wait_on_buffer (bh);
}
inode->i_ctime = CURRENT_TIME;
inode->i_blocks += blocks;
inode->i_dirt = 1;
inode->u.ext2_i.i_next_alloc_block = new_block;
inode->u.ext2_i.i_next_alloc_goal = tmp;
brelse (bh);
return result;
}
static int block_getcluster (struct inode * inode, struct buffer_head * bh,
int nr,
int blocksize)
{
u32 * p;
int firstblock = 0;
int result = 0;
int i;
/* Check to see if clustering possible here. */
if(!bh) return 0;
if((nr & ((PAGE_SIZE >> EXT2_BLOCK_SIZE_BITS(inode->i_sb)) - 1)) != 0)
goto out;
if(nr + 3 > EXT2_ADDR_PER_BLOCK(inode->i_sb)) goto out;
for(i=0; i< (PAGE_SIZE >> EXT2_BLOCK_SIZE_BITS(inode->i_sb)); i++) {
p = (u32 *) bh->b_data + nr + i;
/* All blocks in cluster must already be allocated */
if(*p == 0) goto out;
/* See if aligned correctly */
if(i==0) firstblock = *p;
else if(*p != firstblock + i) goto out;
}
p = (u32 *) bh->b_data + nr;
result = generate_cluster(bh->b_dev, (int *) p, blocksize);
out:
brelse(bh);
return result;
}
struct buffer_head * ext2_getblk (struct inode * inode, long block,
int create, int * err)
{
struct buffer_head * bh;
unsigned long b;
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);
*err = -EIO;
if (block < 0) {
ext2_warning (inode->i_sb, "ext2_getblk", "block < 0");
return NULL;
}
if (block > EXT2_NDIR_BLOCKS + addr_per_block +
(1 << (addr_per_block_bits * 2)) +
((1 << (addr_per_block_bits * 2)) << addr_per_block_bits)) {
ext2_warning (inode->i_sb, "ext2_getblk", "block > big");
return NULL;
}
/*
* If this is a sequential block allocation, set the next_alloc_block
* to this block now so that all the indblock and data block
* allocations use the same goal zone
*/
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_goal);
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_goal++;
}
*err = -ENOSPC;
b = block;
if (block < EXT2_NDIR_BLOCKS)
return inode_getblk (inode, block, create, b, err);
block -= EXT2_NDIR_BLOCKS;
if (block < addr_per_block) {
bh = inode_getblk (inode, EXT2_IND_BLOCK, create, b, err);
return block_getblk (inode, bh, block, create,
inode->i_sb->s_blocksize, b, err);
}
block -= addr_per_block;
if (block < (1 << (addr_per_block_bits * 2))) {
bh = inode_getblk (inode, EXT2_DIND_BLOCK, create, b, err);
bh = block_getblk (inode, bh, block >> addr_per_block_bits,
create, inode->i_sb->s_blocksize, b, err);
return block_getblk (inode, bh, block & (addr_per_block - 1),
create, inode->i_sb->s_blocksize, b, err);
}
block -= (1 << (addr_per_block_bits * 2));
bh = inode_getblk (inode, EXT2_TIND_BLOCK, create, b, err);
bh = block_getblk (inode, bh, block >> (addr_per_block_bits * 2),
create, inode->i_sb->s_blocksize, b, err);
bh = block_getblk (inode, bh, (block >> addr_per_block_bits) & (addr_per_block - 1),
create, inode->i_sb->s_blocksize, b, err);
return block_getblk (inode, bh, block & (addr_per_block - 1), create,
inode->i_sb->s_blocksize, b, err);
}
int ext2_getcluster (struct inode * inode, long block)
{
struct buffer_head * bh;
int err, create;
unsigned long b;
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);
create = 0;
err = -EIO;
if (block < 0) {
ext2_warning (inode->i_sb, "ext2_getblk", "block < 0");
return 0;
}
if (block > EXT2_NDIR_BLOCKS + addr_per_block +
(1 << (addr_per_block_bits * 2)) +
((1 << (addr_per_block_bits * 2)) << addr_per_block_bits)) {
ext2_warning (inode->i_sb, "ext2_getblk", "block > big");
return 0;
}
err = -ENOSPC;
b = block;
if (block < EXT2_NDIR_BLOCKS) return 0;
block -= EXT2_NDIR_BLOCKS;
if (block < addr_per_block) {
bh = inode_getblk (inode, EXT2_IND_BLOCK, create, b, &err);
return block_getcluster (inode, bh, block,
inode->i_sb->s_blocksize);
}
block -= addr_per_block;
if (block < (1 << (addr_per_block_bits * 2))) {
bh = inode_getblk (inode, EXT2_DIND_BLOCK, create, b, &err);
bh = block_getblk (inode, bh, block >> addr_per_block_bits,
create, inode->i_sb->s_blocksize, b, &err);
return block_getcluster (inode, bh, block & (addr_per_block - 1),
inode->i_sb->s_blocksize);
}
block -= (1 << (addr_per_block_bits * 2));
bh = inode_getblk (inode, EXT2_TIND_BLOCK, create, b, &err);
bh = block_getblk (inode, bh, block >> (addr_per_block_bits * 2),
create, inode->i_sb->s_blocksize, b, &err);
bh = block_getblk (inode, bh, (block >> addr_per_block_bits) & (addr_per_block - 1),
create, inode->i_sb->s_blocksize, b, &err);
return block_getcluster (inode, bh, block & (addr_per_block - 1),
inode->i_sb->s_blocksize);
}
struct buffer_head * ext2_bread (struct inode * inode, int block,
int create, int *err)
{
struct buffer_head * bh;
bh = ext2_getblk (inode, block, create, err);
if (!bh || buffer_uptodate(bh))
return bh;
ll_rw_block (READ, 1, &bh);
wait_on_buffer (bh);
if (buffer_uptodate(bh))
return bh;
brelse (bh);
*err = -EIO;
return NULL;
}
void ext2_read_inode (struct inode * inode)
{
struct buffer_head * bh;
struct ext2_inode * raw_inode;
unsigned long block_group;
unsigned long group_desc;
unsigned long desc;
unsigned long block;
unsigned long offset;
struct ext2_group_desc * gdp;
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_FIRST_INO(inode->i_sb)) ||
inode->i_ino > inode->i_sb->u.ext2_sb.s_es->s_inodes_count) {
ext2_error (inode->i_sb, "ext2_read_inode",
"bad inode number: %lu", inode->i_ino);
return;
}
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)
ext2_panic (inode->i_sb, "ext2_read_inode",
"group >= groups count");
group_desc = block_group >> EXT2_DESC_PER_BLOCK_BITS(inode->i_sb);
desc = block_group & (EXT2_DESC_PER_BLOCK(inode->i_sb) - 1);
bh = inode->i_sb->u.ext2_sb.s_group_desc[group_desc];
if (!bh)
ext2_panic (inode->i_sb, "ext2_read_inode",
"Descriptor not loaded");
gdp = (struct ext2_group_desc *) bh->b_data;
/*
* Figure out the offset within the block group inode table
*/
offset = ((inode->i_ino - 1) % EXT2_INODES_PER_GROUP(inode->i_sb)) *
EXT2_INODE_SIZE(inode->i_sb);
block = gdp[desc].bg_inode_table +
(offset >> EXT2_BLOCK_SIZE_BITS(inode->i_sb));
if (!(bh = bread (inode->i_dev, block, inode->i_sb->s_blocksize)))
ext2_panic (inode->i_sb, "ext2_read_inode",
"unable to read i-node block - "
"inode=%lu, block=%lu", inode->i_ino, block);
offset &= (EXT2_BLOCK_SIZE(inode->i_sb) - 1);
raw_inode = (struct ext2_inode *) (bh->b_data + offset);
inode->i_mode = raw_inode->i_mode;
inode->i_uid = raw_inode->i_uid;
inode->i_gid = raw_inode->i_gid;
inode->i_nlink = raw_inode->i_links_count;
inode->i_size = raw_inode->i_size;
inode->i_atime = raw_inode->i_atime;
inode->i_ctime = raw_inode->i_ctime;
inode->i_mtime = raw_inode->i_mtime;
inode->u.ext2_i.i_dtime = raw_inode->i_dtime;
inode->i_blksize = PAGE_SIZE; /* This is the optimal IO size (for stat), not the fs block size */
inode->i_blocks = raw_inode->i_blocks;
inode->i_version = ++event;
inode->u.ext2_i.i_new_inode = 0;
inode->u.ext2_i.i_flags = raw_inode->i_flags;
inode->u.ext2_i.i_faddr = raw_inode->i_faddr;
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_osync = 0;
inode->u.ext2_i.i_file_acl = raw_inode->i_file_acl;
inode->u.ext2_i.i_dir_acl = raw_inode->i_dir_acl;
inode->u.ext2_i.i_version = raw_inode->i_version;
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_goal = 0;
if (inode->u.ext2_i.i_prealloc_count)
ext2_error (inode->i_sb, "ext2_read_inode",
"New inode has non-zero prealloc count!");
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
inode->i_rdev = to_kdev_t(raw_inode->i_block[0]);
else for (block = 0; block < EXT2_N_BLOCKS; block++)
inode->u.ext2_i.i_data[block] = raw_inode->i_block[block];
brelse (bh);
inode->i_op = NULL;
if (inode->i_ino == EXT2_ACL_IDX_INO ||
inode->i_ino == EXT2_ACL_DATA_INO)
/* Nothing to do */ ;
else if (S_ISREG(inode->i_mode))
inode->i_op = &ext2_file_inode_operations;
else if (S_ISDIR(inode->i_mode))
inode->i_op = &ext2_dir_inode_operations;
else if (S_ISLNK(inode->i_mode))
inode->i_op = &ext2_symlink_inode_operations;
else if (S_ISCHR(inode->i_mode))
inode->i_op = &chrdev_inode_operations;
else if (S_ISBLK(inode->i_mode))
inode->i_op = &blkdev_inode_operations;
else if (S_ISFIFO(inode->i_mode))
init_fifo(inode);
if (inode->u.ext2_i.i_flags & EXT2_SYNC_FL)
inode->i_flags |= MS_SYNCHRONOUS;
if (inode->u.ext2_i.i_flags & EXT2_APPEND_FL)
inode->i_flags |= S_APPEND;
if (inode->u.ext2_i.i_flags & EXT2_IMMUTABLE_FL)
inode->i_flags |= S_IMMUTABLE;
}
static int ext2_update_inode(struct inode * inode, int do_sync)
{
struct buffer_head * bh;
struct ext2_inode * raw_inode;
unsigned long block_group;
unsigned long group_desc;
unsigned long desc;
unsigned long block;
unsigned long offset;
int err = 0;
struct ext2_group_desc * gdp;
if ((inode->i_ino != EXT2_ROOT_INO &&
inode->i_ino < EXT2_FIRST_INO(inode->i_sb)) ||
inode->i_ino > inode->i_sb->u.ext2_sb.s_es->s_inodes_count) {
ext2_error (inode->i_sb, "ext2_write_inode",
"bad inode number: %lu", inode->i_ino);
return 0;
}
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)
ext2_panic (inode->i_sb, "ext2_write_inode",
"group >= groups count");
group_desc = block_group >> EXT2_DESC_PER_BLOCK_BITS(inode->i_sb);
desc = block_group & (EXT2_DESC_PER_BLOCK(inode->i_sb) - 1);
bh = inode->i_sb->u.ext2_sb.s_group_desc[group_desc];
if (!bh)
ext2_panic (inode->i_sb, "ext2_write_inode",
"Descriptor not loaded");
gdp = (struct ext2_group_desc *) bh->b_data;
/*
* Figure out the offset within the block group inode table
*/
offset = ((inode->i_ino - 1) % EXT2_INODES_PER_GROUP(inode->i_sb)) *
EXT2_INODE_SIZE(inode->i_sb);
block = gdp[desc].bg_inode_table +
(offset >> EXT2_BLOCK_SIZE_BITS(inode->i_sb));
if (!(bh = bread (inode->i_dev, block, inode->i_sb->s_blocksize)))
ext2_panic (inode->i_sb, "ext2_write_inode",
"unable to read i-node block - "
"inode=%lu, block=%lu", inode->i_ino, block);
offset &= EXT2_BLOCK_SIZE(inode->i_sb) - 1;
raw_inode = (struct ext2_inode *) (bh->b_data + offset);
raw_inode->i_mode = inode->i_mode;
raw_inode->i_uid = inode->i_uid;
raw_inode->i_gid = inode->i_gid;
raw_inode->i_links_count = inode->i_nlink;
raw_inode->i_size = inode->i_size;
raw_inode->i_atime = inode->i_atime;
raw_inode->i_ctime = inode->i_ctime;
raw_inode->i_mtime = inode->i_mtime;
raw_inode->i_blocks = inode->i_blocks;
raw_inode->i_dtime = inode->u.ext2_i.i_dtime;
raw_inode->i_flags = inode->u.ext2_i.i_flags;
raw_inode->i_faddr = inode->u.ext2_i.i_faddr;
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_file_acl = inode->u.ext2_i.i_file_acl;
raw_inode->i_dir_acl = inode->u.ext2_i.i_dir_acl;
raw_inode->i_version = inode->u.ext2_i.i_version;
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
raw_inode->i_block[0] = kdev_t_to_nr(inode->i_rdev);
else for (block = 0; block < EXT2_N_BLOCKS; block++)
raw_inode->i_block[block] = inode->u.ext2_i.i_data[block];
mark_buffer_dirty(bh, 1);
inode->i_dirt = 0;
if (do_sync) {
ll_rw_block (WRITE, 1, &bh);
wait_on_buffer (bh);
if (buffer_req(bh) && !buffer_uptodate(bh)) {
printk ("IO error syncing ext2 inode ["
"%s:%08lx]\n",
kdevname(inode->i_dev), inode->i_ino);
err = -1;
}
}
brelse (bh);
return err;
}
void ext2_write_inode (struct inode * inode)
{
ext2_update_inode (inode, 0);
}
int ext2_sync_inode (struct inode *inode)
{
return ext2_update_inode (inode, 1);
}