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ufs: restore maintaining ->i_blocks 

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-06-08 21:15:03 -04:00
parent 414cf7186d
commit eb315d2ae6
2 changed files with 26 additions and 1 deletions
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1
fs/stat.c
View File

@ -672,6 +672,7 @@ void __inode_add_bytes(struct inode *inode, loff_t bytes)
inode->i_bytes -= 512;
}
}
EXPORT_SYMBOL(__inode_add_bytes);
void inode_add_bytes(struct inode *inode, loff_t bytes)
{

26
fs/ufs/balloc.c
View File

@ -82,7 +82,8 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
ufs_error (sb, "ufs_free_fragments",
"bit already cleared for fragment %u", i);
}
inode_sub_bytes(inode, count << uspi->s_fshift);
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);
@ -184,6 +185,7 @@ do_more:
ufs_error(sb, "ufs_free_blocks", "freeing free fragment");
}
ubh_setblock(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
inode_sub_bytes(inode, uspi->s_fpb << uspi->s_fshift);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
@ -494,6 +496,20 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
return 0;
}
static bool try_add_frags(struct inode *inode, unsigned frags)
{
unsigned size = frags * i_blocksize(inode);
spin_lock(&inode->i_lock);
__inode_add_bytes(inode, size);
if (unlikely((u32)inode->i_blocks != inode->i_blocks)) {
__inode_sub_bytes(inode, size);
spin_unlock(&inode->i_lock);
return false;
}
spin_unlock(&inode->i_lock);
return true;
}
static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
unsigned oldcount, unsigned newcount)
{
@ -530,6 +546,9 @@ static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
for (i = oldcount; i < newcount; i++)
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
return 0;
if (!try_add_frags(inode, count))
return 0;
/*
* Block can be extended
*/
@ -647,6 +666,7 @@ cg_found:
ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, goal + i);
i = uspi->s_fpb - count;
inode_sub_bytes(inode, i << uspi->s_fshift);
fs32_add(sb, &ucg->cg_cs.cs_nffree, i);
uspi->cs_total.cs_nffree += i;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i);
@ -657,6 +677,8 @@ cg_found:
result = ufs_bitmap_search (sb, ucpi, goal, allocsize);
if (result == INVBLOCK)
return 0;
if (!try_add_frags(inode, count))
return 0;
for (i = 0; i < count; i++)
ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, result + i);
@ -716,6 +738,8 @@ norot:
return INVBLOCK;
ucpi->c_rotor = result;
gotit:
if (!try_add_frags(inode, uspi->s_fpb))
return 0;
blkno = ufs_fragstoblks(result);
ubh_clrblock (UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)