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ufs_trunc_dindirect(): pass the number of blocks to keep 

same as the previous two.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-06-18 14:21:09 -04:00
parent 6ac36b8777
commit 7bad5939fc
1 changed files with 26 additions and 31 deletions
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57
fs/ufs/inode.c
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@ -1136,25 +1136,15 @@ static void ufs_trunc_indirect(struct inode *inode, unsigned from, void *p)
static void ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p)
{
struct super_block * sb;
struct ufs_sb_private_info * uspi;
struct super_block *sb = inode->i_sb;
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
struct ufs_buffer_head *dind_bh;
u64 i, tmp, dindirect_block;
u64 tmp;
void *dind;
unsigned from;
UFSD("ENTER: ino %lu\n", inode->i_ino);
sb = inode->i_sb;
uspi = UFS_SB(sb)->s_uspi;
if (DIRECT_BLOCK <= offset) {
dindirect_block = 0;
from = 0;
} else {
dindirect_block = (DIRECT_BLOCK - offset) >> uspi->s_apbshift;
from = (DIRECT_BLOCK - offset) & uspi->s_apbmask;
}
bool free_it = !offset;
unsigned dindirect_block = offset >> uspi->s_apbshift;
unsigned from = offset & uspi->s_apbmask;
unsigned i;
tmp = ufs_data_ptr_to_cpu(sb, p);
if (!tmp)
@ -1176,11 +1166,7 @@ static void ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p)
ubh_mark_buffer_dirty(dind_bh);
}
for (i = 0; i < uspi->s_apb; i++)
if (!ufs_is_data_ptr_zero(uspi,
ubh_get_data_ptr(uspi, dind_bh, i)))
break;
if (i >= uspi->s_apb) {
if (free_it) {
tmp = ufs_data_ptr_to_cpu(sb, p);
write_seqlock(&UFS_I(inode)->meta_lock);
ufs_data_ptr_clear(uspi, p);
@ -1189,13 +1175,11 @@ static void ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p)
ubh_bforget(dind_bh);
ufs_free_blocks(inode, tmp, uspi->s_fpb);
mark_inode_dirty(inode);
dind_bh = NULL;
return;
}
if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh))
if (IS_SYNC(inode) && ubh_buffer_dirty(dind_bh))
ubh_sync_block(dind_bh);
ubh_brelse (dind_bh);
UFSD("EXIT: ino %lu\n", inode->i_ino);
}
static void ufs_trunc_tindirect(struct inode *inode, u64 offset)
@ -1210,6 +1194,8 @@ static void ufs_trunc_tindirect(struct inode *inode, u64 offset)
unsigned tindirect_block = offset >> uspi->s_2apbshift;
unsigned i;
offset -= tindirect_block << uspi->s_2apbshift;
p = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK);
if (!(tmp = ufs_data_ptr_to_cpu(sb, p)))
return;
@ -1221,10 +1207,9 @@ static void ufs_trunc_tindirect(struct inode *inode, u64 offset)
return;
}
for (i = tindirect_block ; i < uspi->s_apb ; i++) {
for (i = tindirect_block ; i < uspi->s_apb ; i++, offset = 0) {
tind = ubh_get_data_ptr(uspi, tind_bh, i);
ufs_trunc_dindirect(inode, UFS_NDADDR +
uspi->s_apb + ((i + 1) << uspi->s_2apbshift), tind);
ufs_trunc_dindirect(inode, offset, tind);
ubh_mark_buffer_dirty(tind_bh);
}
if (free_it) {
@ -1318,18 +1303,28 @@ static void __ufs_truncate_blocks(struct inode *inode)
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block *sb = inode->i_sb;
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
unsigned offsets[4] = {0,};
unsigned offsets[4];
int depth = ufs_block_to_path(inode, DIRECT_BLOCK, offsets);
mutex_lock(&ufsi->truncate_mutex);
switch (depth) {
case 1:
ufs_trunc_direct(inode);
ufs_trunc_indirect(inode, 0,
ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK));
ufs_trunc_dindirect(inode, 0,
ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK));
ufs_trunc_tindirect(inode, 0);
break;
case 2:
ufs_trunc_indirect(inode, offsets[1],
ufs_get_direct_data_ptr(uspi, ufsi, UFS_IND_BLOCK));
ufs_trunc_dindirect(inode, 0,
ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK));
ufs_trunc_tindirect(inode, 0);
break;
case 3:
ufs_trunc_dindirect(inode, UFS_IND_BLOCK + uspi->s_apb,
ufs_trunc_dindirect(inode, DIRECT_BLOCK - UFS_IND_BLOCK - uspi->s_apb,
ufs_get_direct_data_ptr(uspi, ufsi, UFS_DIND_BLOCK));
ufs_trunc_tindirect(inode, 0);
break;