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-rw-r--r--fs/ocfs2/resize.c40
-rw-r--r--fs/ocfs2/suballoc.c74
-rw-r--r--fs/ocfs2/suballoc.h20
3 files changed, 68 insertions, 66 deletions
diff --git a/fs/ocfs2/resize.c b/fs/ocfs2/resize.c
index 739d452f617..a2de32a317a 100644
--- a/fs/ocfs2/resize.c
+++ b/fs/ocfs2/resize.c
@@ -396,41 +396,16 @@ static int ocfs2_check_new_group(struct inode *inode,
struct buffer_head *group_bh)
{
int ret;
- struct ocfs2_group_desc *gd;
+ struct ocfs2_group_desc *gd =
+ (struct ocfs2_group_desc *)group_bh->b_data;
u16 cl_bpc = le16_to_cpu(di->id2.i_chain.cl_bpc);
- unsigned int max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) *
- le16_to_cpu(di->id2.i_chain.cl_bpc);
+ ret = ocfs2_validate_group_descriptor(inode->i_sb, di, gd, 1);
+ if (ret)
+ goto out;
- gd = (struct ocfs2_group_desc *)group_bh->b_data;
-
- ret = -EIO;
- if (!OCFS2_IS_VALID_GROUP_DESC(gd))
- mlog(ML_ERROR, "Group descriptor # %llu isn't valid.\n",
- (unsigned long long)le64_to_cpu(gd->bg_blkno));
- else if (di->i_blkno != gd->bg_parent_dinode)
- mlog(ML_ERROR, "Group descriptor # %llu has bad parent "
- "pointer (%llu, expected %llu)\n",
- (unsigned long long)le64_to_cpu(gd->bg_blkno),
- (unsigned long long)le64_to_cpu(gd->bg_parent_dinode),
- (unsigned long long)le64_to_cpu(di->i_blkno));
- else if (le16_to_cpu(gd->bg_bits) > max_bits)
- mlog(ML_ERROR, "Group descriptor # %llu has bit count of %u\n",
- (unsigned long long)le64_to_cpu(gd->bg_blkno),
- le16_to_cpu(gd->bg_bits));
- else if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits))
- mlog(ML_ERROR, "Group descriptor # %llu has bit count %u but "
- "claims that %u are free\n",
- (unsigned long long)le64_to_cpu(gd->bg_blkno),
- le16_to_cpu(gd->bg_bits),
- le16_to_cpu(gd->bg_free_bits_count));
- else if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size)))
- mlog(ML_ERROR, "Group descriptor # %llu has bit count %u but "
- "max bitmap bits of %u\n",
- (unsigned long long)le64_to_cpu(gd->bg_blkno),
- le16_to_cpu(gd->bg_bits),
- 8 * le16_to_cpu(gd->bg_size));
- else if (le16_to_cpu(gd->bg_chain) != input->chain)
+ ret = -EINVAL;
+ if (le16_to_cpu(gd->bg_chain) != input->chain)
mlog(ML_ERROR, "Group descriptor # %llu has bad chain %u "
"while input has %u set.\n",
(unsigned long long)le64_to_cpu(gd->bg_blkno),
@@ -449,6 +424,7 @@ static int ocfs2_check_new_group(struct inode *inode,
else
ret = 0;
+out:
return ret;
}
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index 95d432b694e..ddba97dc06a 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -146,59 +146,71 @@ static u32 ocfs2_bits_per_group(struct ocfs2_chain_list *cl)
}
/* somewhat more expensive than our other checks, so use sparingly. */
-int ocfs2_check_group_descriptor(struct super_block *sb,
- struct ocfs2_dinode *di,
- struct ocfs2_group_desc *gd)
+int ocfs2_validate_group_descriptor(struct super_block *sb,
+ struct ocfs2_dinode *di,
+ struct ocfs2_group_desc *gd,
+ int clean_error)
{
unsigned int max_bits;
+#define do_error(fmt, ...) \
+ do{ \
+ if (clean_error) \
+ mlog(ML_ERROR, fmt "\n", ##__VA_ARGS__); \
+ else \
+ ocfs2_error(sb, fmt, ##__VA_ARGS__); \
+ } while (0)
+
if (!OCFS2_IS_VALID_GROUP_DESC(gd)) {
- OCFS2_RO_ON_INVALID_GROUP_DESC(sb, gd);
- return -EIO;
+ do_error("Group Descriptor #%llu has bad signature %.*s",
+ (unsigned long long)le64_to_cpu(gd->bg_blkno), 7,
+ gd->bg_signature);
+ return -EINVAL;
}
if (di->i_blkno != gd->bg_parent_dinode) {
- ocfs2_error(sb, "Group descriptor # %llu has bad parent "
- "pointer (%llu, expected %llu)",
- (unsigned long long)le64_to_cpu(gd->bg_blkno),
- (unsigned long long)le64_to_cpu(gd->bg_parent_dinode),
- (unsigned long long)le64_to_cpu(di->i_blkno));
- return -EIO;
+ do_error("Group descriptor # %llu has bad parent "
+ "pointer (%llu, expected %llu)",
+ (unsigned long long)le64_to_cpu(gd->bg_blkno),
+ (unsigned long long)le64_to_cpu(gd->bg_parent_dinode),
+ (unsigned long long)le64_to_cpu(di->i_blkno));
+ return -EINVAL;
}
max_bits = le16_to_cpu(di->id2.i_chain.cl_cpg) * le16_to_cpu(di->id2.i_chain.cl_bpc);
if (le16_to_cpu(gd->bg_bits) > max_bits) {
- ocfs2_error(sb, "Group descriptor # %llu has bit count of %u",
- (unsigned long long)le64_to_cpu(gd->bg_blkno),
- le16_to_cpu(gd->bg_bits));
- return -EIO;
+ do_error("Group descriptor # %llu has bit count of %u",
+ (unsigned long long)le64_to_cpu(gd->bg_blkno),
+ le16_to_cpu(gd->bg_bits));
+ return -EINVAL;
}
if (le16_to_cpu(gd->bg_chain) >=
le16_to_cpu(di->id2.i_chain.cl_next_free_rec)) {
- ocfs2_error(sb, "Group descriptor # %llu has bad chain %u",
- (unsigned long long)le64_to_cpu(gd->bg_blkno),
- le16_to_cpu(gd->bg_chain));
- return -EIO;
+ do_error("Group descriptor # %llu has bad chain %u",
+ (unsigned long long)le64_to_cpu(gd->bg_blkno),
+ le16_to_cpu(gd->bg_chain));
+ return -EINVAL;
}
if (le16_to_cpu(gd->bg_free_bits_count) > le16_to_cpu(gd->bg_bits)) {
- ocfs2_error(sb, "Group descriptor # %llu has bit count %u but "
- "claims that %u are free",
- (unsigned long long)le64_to_cpu(gd->bg_blkno),
- le16_to_cpu(gd->bg_bits),
- le16_to_cpu(gd->bg_free_bits_count));
- return -EIO;
+ do_error("Group descriptor # %llu has bit count %u but "
+ "claims that %u are free",
+ (unsigned long long)le64_to_cpu(gd->bg_blkno),
+ le16_to_cpu(gd->bg_bits),
+ le16_to_cpu(gd->bg_free_bits_count));
+ return -EINVAL;
}
if (le16_to_cpu(gd->bg_bits) > (8 * le16_to_cpu(gd->bg_size))) {
- ocfs2_error(sb, "Group descriptor # %llu has bit count %u but "
- "max bitmap bits of %u",
- (unsigned long long)le64_to_cpu(gd->bg_blkno),
- le16_to_cpu(gd->bg_bits),
- 8 * le16_to_cpu(gd->bg_size));
- return -EIO;
+ do_error("Group descriptor # %llu has bit count %u but "
+ "max bitmap bits of %u",
+ (unsigned long long)le64_to_cpu(gd->bg_blkno),
+ le16_to_cpu(gd->bg_bits),
+ 8 * le16_to_cpu(gd->bg_size));
+ return -EINVAL;
}
+#undef do_error
return 0;
}
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h
index 4df159d8f45..7adfcc478bd 100644
--- a/fs/ocfs2/suballoc.h
+++ b/fs/ocfs2/suballoc.h
@@ -165,9 +165,23 @@ void ocfs2_free_ac_resource(struct ocfs2_alloc_context *ac);
u64 ocfs2_which_cluster_group(struct inode *inode, u32 cluster);
/* somewhat more expensive than our other checks, so use sparingly. */
-int ocfs2_check_group_descriptor(struct super_block *sb,
- struct ocfs2_dinode *di,
- struct ocfs2_group_desc *gd);
+/*
+ * By default, ocfs2_validate_group_descriptor() calls ocfs2_error() when it
+ * finds a problem. A caller that wants to check a group descriptor
+ * without going readonly passes a nonzero clean_error. This is only
+ * resize, really.
+ */
+int ocfs2_validate_group_descriptor(struct super_block *sb,
+ struct ocfs2_dinode *di,
+ struct ocfs2_group_desc *gd,
+ int clean_error);
+static inline int ocfs2_check_group_descriptor(struct super_block *sb,
+ struct ocfs2_dinode *di,
+ struct ocfs2_group_desc *gd)
+{
+ return ocfs2_validate_group_descriptor(sb, di, gd, 0);
+}
+
int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_extent_tree *et,
u32 clusters_to_add, u32 extents_to_split,
struct ocfs2_alloc_context **data_ac,
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-26 10:47:09 +0000