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nilfs2: replace BUG_ON and BUG calls triggerable from ioctl

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Pekka Enberg advised me:
> It would be nice if BUG(), BUG_ON(), and panic() calls would be
> converted to proper error handling using WARN_ON() calls. The BUG()
> call in nilfs_cpfile_delete_checkpoints(), for example, looks to be
> triggerable from user-space via the ioctl() system call.

This will follow the comment and keep them to a minimum.

Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ryusuke Konishi
2009-04-06 19:01:55 -07:00
committed by Linus Torvalds
parent 2c2e52fc4f
commit 1f5abe7e7d
13 changed files with 144 additions and 160 deletions
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19
fs/nilfs2/inode.c
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@@ -61,12 +61,6 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
map_bh(bh_result, inode->i_sb, blknum);
goto out;
}
if (unlikely(ret == 1)) {
printk(KERN_ERR "nilfs_get_block: bmap_lookup returns "
"buffer_head pointer (blkoff=%llu, blknum=%lu)\n",
(unsigned long long)blkoff, blknum);
BUG();
}
/* data block was not found */
if (ret == -ENOENT && create) {
struct nilfs_transaction_info ti;
@@ -85,14 +79,14 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
* However, the page having this block must
* be locked in this case.
*/
printk(KERN_ERR
printk(KERN_WARNING
"nilfs_get_block: a race condition "
"while inserting a data block. "
"(inode number=%lu, file block "
"offset=%llu)\n",
inode->i_ino,
(unsigned long long)blkoff);
BUG();
err = 0;
} else if (err == -EINVAL) {
nilfs_error(inode->i_sb, __func__,
"broken bmap (inode=%lu)\n",
@@ -621,7 +615,6 @@ void nilfs_truncate(struct inode *inode)
struct nilfs_transaction_info ti;
struct super_block *sb = inode->i_sb;
struct nilfs_inode_info *ii = NILFS_I(inode);
int ret;
if (!test_bit(NILFS_I_BMAP, &ii->i_state))
return;
@@ -630,8 +623,7 @@ void nilfs_truncate(struct inode *inode)
blocksize = sb->s_blocksize;
blkoff = (inode->i_size + blocksize - 1) >> sb->s_blocksize_bits;
ret = nilfs_transaction_begin(sb, &ti, 0);
BUG_ON(ret);
nilfs_transaction_begin(sb, &ti, 0); /* never fails */
block_truncate_page(inode->i_mapping, inode->i_size, nilfs_get_block);
@@ -652,7 +644,6 @@ void nilfs_delete_inode(struct inode *inode)
struct nilfs_transaction_info ti;
struct super_block *sb = inode->i_sb;
struct nilfs_inode_info *ii = NILFS_I(inode);
int err;
if (unlikely(is_bad_inode(inode))) {
if (inode->i_data.nrpages)
@@ -660,8 +651,8 @@ void nilfs_delete_inode(struct inode *inode)
clear_inode(inode);
return;
}
err = nilfs_transaction_begin(sb, &ti, 0);
BUG_ON(err);
nilfs_transaction_begin(sb, &ti, 0); /* never fails */
if (inode->i_data.nrpages)
truncate_inode_pages(&inode->i_data, 0);