/*
* Free 'count' fragments from fragment number 'fragment'
*/
void ufs_free_fragments (struct inode * inode, unsigned fragment, unsigned count) {
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
unsigned cgno, bit, end_bit, bbase, blkmap, i, blkno, cylno;
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(USPI_UBH);
UFSD(("ENTER, fragment %u, count %u\n", fragment, count))
if (ufs_fragnum(fragment) + count > uspi->s_fpg)
ufs_error (sb, "ufs_free_fragments", "internal error");
lock_super(sb);
cgno = ufs_dtog(fragment);
bit = ufs_dtogd(fragment);
if (cgno >= uspi->s_ncg) {
ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device");
goto failed;
}
ucpi = ufs_load_cylinder (sb, cgno);
if (!ucpi)
goto failed;
ucg = ubh_get_ucg (UCPI_UBH);
if (!ufs_cg_chkmagic(sb, ucg)) {
ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno);
goto failed;
}
end_bit = bit + count;
bbase = ufs_blknum (bit);
blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase);
ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1);
for (i = bit; i < end_bit; i++) {
if (ubh_isclr (UCPI_UBH, ucpi->c_freeoff, i))
ubh_setbit (UCPI_UBH, ucpi->c_freeoff, i);
else ufs_error (sb, "ufs_free_fragments",
"bit already cleared for fragment %u", i);
}
DQUOT_FREE_BLOCK (inode, count);
fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
fs32_add(sb, &usb1->fs_cstotal.cs_nffree, count);
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
blkmap = ubh_blkmap (UCPI_UBH, ucpi->c_freeoff, bbase);
ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1);
/*
* Trying to reassemble free fragments into block
*/
blkno = ufs_fragstoblks (bbase);
if (ubh_isblockset(UCPI_UBH, ucpi->c_freeoff, blkno)) {
fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb);
fs32_sub(sb, &usb1->fs_cstotal.cs_nffree, uspi->s_fpb);
fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
fs32_add(sb, &usb1->fs_cstotal.cs_nbfree, 1);
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
cylno = ufs_cbtocylno (bbase);
fs16_add(sb, &ubh_cg_blks(ucpi, cylno, ufs_cbtorpos(bbase)), 1);
fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
}
ubh_mark_buffer_dirty (USPI_UBH);
ubh_mark_buffer_dirty (UCPI_UBH);
if (sb->s_flags & MS_SYNCHRONOUS) {
ubh_wait_on_buffer (UCPI_UBH);
ubh_ll_rw_block (WRITE, 1, (struct ufs_buffer_head **)&ucpi);
ubh_wait_on_buffer (UCPI_UBH);
}
sb->s_dirt = 1;
unlock_super (sb);
UFSD(("EXIT\n"))
return;
failed:
unlock_super (sb);
UFSD(("EXIT (FAILED)\n"))
return;
}
static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
unsigned oldcount, unsigned newcount, int *err)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
unsigned cgno, fragno, fragoff, count, fragsize, i;
UFSD("ENTER, fragment %llu, oldcount %u, newcount %u\n",
(unsigned long long)fragment, oldcount, newcount);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first (uspi);
count = newcount - oldcount;
cgno = ufs_dtog(uspi, fragment);
if (fs32_to_cpu(sb, UFS_SB(sb)->fs_cs(cgno).cs_nffree) < count)
return 0;
if ((ufs_fragnum (fragment) + newcount) > uspi->s_fpb)
return 0;
ucpi = ufs_load_cylinder (sb, cgno);
if (!ucpi)
return 0;
ucg = ubh_get_ucg (UCPI_UBH(ucpi));
if (!ufs_cg_chkmagic(sb, ucg)) {
ufs_panic (sb, "ufs_add_fragments",
"internal error, bad magic number on cg %u", cgno);
return 0;
}
fragno = ufs_dtogd(uspi, fragment);
fragoff = ufs_fragnum (fragno);
for (i = oldcount; i < newcount; i++)
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
return 0;
/*
* Block can be extended
*/
ucg->cg_time = cpu_to_fs32(sb, get_seconds());
for (i = newcount; i < (uspi->s_fpb - fragoff); i++)
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
break;
fragsize = i - oldcount;
if (!fs32_to_cpu(sb, ucg->cg_frsum[fragsize]))
ufs_panic (sb, "ufs_add_fragments",
"internal error or corrupted bitmap on cg %u", cgno);
fs32_sub(sb, &ucg->cg_frsum[fragsize], 1);
if (fragsize != count)
fs32_add(sb, &ucg->cg_frsum[fragsize - count], 1);
for (i = oldcount; i < newcount; i++)
ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i);
fs32_sub(sb, &ucg->cg_cs.cs_nffree, count);
fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
uspi->cs_total.cs_nffree -= count;
ubh_mark_buffer_dirty (USPI_UBH(uspi));
ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
if (sb->s_flags & MS_SYNCHRONOUS)
ubh_sync_block(UCPI_UBH(ucpi));
sb->s_dirt = 1;
UFSD("EXIT, fragment %llu\n", (unsigned long long)fragment);
return fragment;
}
u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
u64 goal, unsigned count, int *err,
struct page *locked_page)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_super_block_first * usb1;
unsigned cgno, oldcount, newcount;
u64 tmp, request, result;
UFSD("ENTER, ino %lu, fragment %llu, goal %llu, count %u\n",
inode->i_ino, (unsigned long long)fragment,
(unsigned long long)goal, count);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
usb1 = ubh_get_usb_first(uspi);
*err = -ENOSPC;
lock_super (sb);
tmp = ufs_data_ptr_to_cpu(sb, p);
if (count + ufs_fragnum(fragment) > uspi->s_fpb) {
ufs_warning(sb, "ufs_new_fragments", "internal warning"
" fragment %llu, count %u",
(unsigned long long)fragment, count);
count = uspi->s_fpb - ufs_fragnum(fragment);
}
oldcount = ufs_fragnum (fragment);
newcount = oldcount + count;
/*
* Somebody else has just allocated our fragments
*/
if (oldcount) {
if (!tmp) {
ufs_error(sb, "ufs_new_fragments", "internal error, "
"fragment %llu, tmp %llu\n",
(unsigned long long)fragment,
(unsigned long long)tmp);
unlock_super(sb);
return INVBLOCK;
}
if (fragment < UFS_I(inode)->i_lastfrag) {
UFSD("EXIT (ALREADY ALLOCATED)\n");
unlock_super (sb);
return 0;
}
}
else {
if (tmp) {
UFSD("EXIT (ALREADY ALLOCATED)\n");
unlock_super(sb);
return 0;
}
}
/*
* There is not enough space for user on the device
*/
if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) {
unlock_super (sb);
UFSD("EXIT (FAILED)\n");
return 0;
}
if (goal >= uspi->s_size)
goal = 0;
if (goal == 0)
cgno = ufs_inotocg (inode->i_ino);
else
cgno = ufs_dtog(uspi, goal);
/*
* allocate new fragment
*/
if (oldcount == 0) {
result = ufs_alloc_fragments (inode, cgno, goal, count, err);
if (result) {
ufs_cpu_to_data_ptr(sb, p, result);
*err = 0;
UFS_I(inode)->i_lastfrag =
max_t(u32, UFS_I(inode)->i_lastfrag,
fragment + count);
ufs_clear_frags(inode, result + oldcount,
newcount - oldcount, locked_page != NULL);
}
unlock_super(sb);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
/*
* resize block
*/
result = ufs_add_fragments (inode, tmp, oldcount, newcount, err);
if (result) {
*err = 0;
UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
locked_page != NULL);
unlock_super(sb);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
/*
* allocate new block and move data
*/
switch (fs32_to_cpu(sb, usb1->fs_optim)) {
case UFS_OPTSPACE:
request = newcount;
if (uspi->s_minfree < 5 || uspi->cs_total.cs_nffree
> uspi->s_dsize * uspi->s_minfree / (2 * 100))
break;
usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
break;
default:
usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
case UFS_OPTTIME:
request = uspi->s_fpb;
if (uspi->cs_total.cs_nffree < uspi->s_dsize *
(uspi->s_minfree - 2) / 100)
break;
usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
break;
}
result = ufs_alloc_fragments (inode, cgno, goal, request, err);
if (result) {
ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
locked_page != NULL);
ufs_change_blocknr(inode, fragment - oldcount, oldcount,
uspi->s_sbbase + tmp,
uspi->s_sbbase + result, locked_page);
ufs_cpu_to_data_ptr(sb, p, result);
*err = 0;
UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
unlock_super(sb);
if (newcount < request)
ufs_free_fragments (inode, result + newcount, request - newcount);
ufs_free_fragments (inode, tmp, oldcount);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
return result;
}
unlock_super(sb);
UFSD("EXIT (FAILED)\n");
return 0;
}
static int ufs_trunc_direct(struct inode *inode)
{
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block * sb;
struct ufs_sb_private_info * uspi;
void *p;
u64 frag1, frag2, frag3, frag4, block1, block2;
unsigned frag_to_free, free_count;
unsigned i, tmp;
int retry;
UFSD("ENTER: ino %lu\n", inode->i_ino);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
frag_to_free = 0;
free_count = 0;
retry = 0;
frag1 = DIRECT_FRAGMENT;
frag4 = min_t(u32, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
frag3 = frag4 & ~uspi->s_fpbmask;
block1 = block2 = 0;
if (frag2 > frag3) {
frag2 = frag4;
frag3 = frag4 = 0;
} else if (frag2 < frag3) {
block1 = ufs_fragstoblks (frag2);
block2 = ufs_fragstoblks (frag3);
}
UFSD("ino %lu, frag1 %llu, frag2 %llu, block1 %llu, block2 %llu,"
" frag3 %llu, frag4 %llu\n", inode->i_ino,
(unsigned long long)frag1, (unsigned long long)frag2,
(unsigned long long)block1, (unsigned long long)block2,
(unsigned long long)frag3, (unsigned long long)frag4);
if (frag1 >= frag2)
goto next1;
/*
* Free first free fragments
*/
p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag1));
tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp )
ufs_panic (sb, "ufs_trunc_direct", "internal error");
frag2 -= frag1;
frag1 = ufs_fragnum (frag1);
ufs_free_fragments(inode, tmp + frag1, frag2);
mark_inode_dirty(inode);
frag_to_free = tmp + frag1;
next1:
/*
* Free whole blocks
*/
for (i = block1 ; i < block2; i++) {
p = ufs_get_direct_data_ptr(uspi, ufsi, i);
tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp)
continue;
ufs_data_ptr_clear(uspi, p);
if (free_count == 0) {
frag_to_free = tmp;
free_count = uspi->s_fpb;
} else if (free_count > 0 && frag_to_free == tmp - free_count)
free_count += uspi->s_fpb;
else {
ufs_free_blocks (inode, frag_to_free, free_count);
frag_to_free = tmp;
free_count = uspi->s_fpb;
}
mark_inode_dirty(inode);
}
if (free_count > 0)
ufs_free_blocks (inode, frag_to_free, free_count);
if (frag3 >= frag4)
goto next3;
/*
* Free last free fragments
*/
p = ufs_get_direct_data_ptr(uspi, ufsi, ufs_fragstoblks(frag3));
tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp )
ufs_panic(sb, "ufs_truncate_direct", "internal error");
frag4 = ufs_fragnum (frag4);
ufs_data_ptr_clear(uspi, p);
ufs_free_fragments (inode, tmp, frag4);
mark_inode_dirty(inode);
next3:
UFSD("EXIT: ino %lu\n", inode->i_ino);
return retry;
}
static int ufs_alloc_lastblock(struct inode *inode)
{
int err = 0;
struct super_block *sb = inode->i_sb;
struct address_space *mapping = inode->i_mapping;
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
unsigned i, end;
sector_t lastfrag;
struct page *lastpage;
struct buffer_head *bh;
u64 phys64;
lastfrag = (i_size_read(inode) + uspi->s_fsize - 1) >> uspi->s_fshift;
if (!lastfrag)
goto out;
lastfrag--;
lastpage = ufs_get_locked_page(mapping, lastfrag >>
(PAGE_CACHE_SHIFT - inode->i_blkbits));
if (IS_ERR(lastpage)) {
err = -EIO;
goto out;
}
end = lastfrag & ((1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1);
bh = page_buffers(lastpage);
for (i = 0; i < end; ++i)
bh = bh->b_this_page;
err = ufs_getfrag_block(inode, lastfrag, bh, 1);
if (unlikely(err))
goto out_unlock;
if (buffer_new(bh)) {
clear_buffer_new(bh);
unmap_underlying_metadata(bh->b_bdev,
bh->b_blocknr);
/*
* we do not zeroize fragment, because of
* if it maped to hole, it already contains zeroes
*/
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
set_page_dirty(lastpage);
}
if (lastfrag >= UFS_IND_FRAGMENT) {
end = uspi->s_fpb - ufs_fragnum(lastfrag) - 1;
phys64 = bh->b_blocknr + 1;
for (i = 0; i < end; ++i) {
bh = sb_getblk(sb, i + phys64);
lock_buffer(bh);
memset(bh->b_data, 0, sb->s_blocksize);
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
unlock_buffer(bh);
sync_dirty_buffer(bh);
brelse(bh);
}
}
out_unlock:
ufs_put_locked_page(lastpage);
out:
return err;
}
/*
* Free 'count' fragments from fragment number 'fragment'
*/
void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct ufs_cg_private_info * ucpi;
struct ufs_cylinder_group * ucg;
unsigned cgno, bit, end_bit, bbase, blkmap, i;
u64 blkno;
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
UFSD("ENTER, fragment %llu, count %u\n",
(unsigned long long)fragment, count);
if (ufs_fragnum(fragment) + count > uspi->s_fpg)
ufs_error (sb, "ufs_free_fragments", "internal error");
mutex_lock(&UFS_SB(sb)->s_lock);
cgno = ufs_dtog(uspi, fragment);
bit = ufs_dtogd(uspi, fragment);
if (cgno >= uspi->s_ncg) {
ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device");
goto failed;
}
ucpi = ufs_load_cylinder (sb, cgno);
if (!ucpi)
goto failed;
ucg = ubh_get_ucg (UCPI_UBH(ucpi));
if (!ufs_cg_chkmagic(sb, ucg)) {
ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno);
goto failed;
}
end_bit = bit + count;
bbase = ufs_blknum (bit);
blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase);
ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1);
for (i = bit; i < end_bit; i++) {
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, i))
ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, i);
else
ufs_error (sb, "ufs_free_fragments",
"bit already cleared for fragment %u", i);
}
fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
uspi->cs_total.cs_nffree += count;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase);
ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1);
/*
* Trying to reassemble free fragments into block
*/
blkno = ufs_fragstoblks (bbase);
if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) {
fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb);
uspi->cs_total.cs_nffree -= uspi->s_fpb;
fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
uspi->cs_total.cs_nbfree++;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
if (uspi->fs_magic != UFS2_MAGIC) {
unsigned cylno = ufs_cbtocylno (bbase);
fs16_add(sb, &ubh_cg_blks(ucpi, cylno,
ufs_cbtorpos(bbase)), 1);
fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
}
}
ubh_mark_buffer_dirty (USPI_UBH(uspi));
ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
if (sb->s_flags & MS_SYNCHRONOUS)
ubh_sync_block(UCPI_UBH(ucpi));
ufs_mark_sb_dirty(sb);
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT\n");
return;
failed:
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT (FAILED)\n");
return;
}
