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authorJoel Becker <Joel.Becker@oracle.com>2008-11-25 15:31:27 +0100
committerMark Fasheh <mfasheh@suse.com>2009-01-05 08:40:24 -0800
commit85eb8b73d66530bb7b931789ae7a5ec9744eed34 (patch)
tree4590be147364e0437f23a0d6bf72ccc900852eb9 /fs/ocfs2/quota_local.c
parent57a09a7b3d9445a17c78d544f1e49d4d7d61705a (diff)
downloadlinux-85eb8b73d66530bb7b931789ae7a5ec9744eed34.tar.bz2
ocfs2: Fix ocfs2_read_quota_block() error handling.
ocfs2_bread() has become ocfs2_read_virt_blocks(), with a prototype to match ocfs2_read_blocks(). The quota code, converting from ocfs2_bread(), wraps the call to ocfs2_read_virt_blocks() in ocfs2_read_quota_block(). Unfortunately, the prototype of ocfs2_read_quota_block() matches the old prototype of ocfs2_bread(). The problem is that ocfs2_bread() returned the buffer head, and callers assumed that a NULL pointer was indicative of error. It wasn't. This is why ocfs2_bread() took an int*err argument as well. The new prototype of ocfs2_read_virt_blocks() avoids this error handling confusion. Let's change ocfs2_read_quota_block() to match. Signed-off-by: Joel Becker <joel.becker@oracle.com> Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/quota_local.c')
-rw-r--r--fs/ocfs2/quota_local.c64
1 files changed, 35 insertions, 29 deletions
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index b98562174cd0..7053664f66a6 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -139,15 +139,15 @@ static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
GROUP_QUOTA_SYSTEM_INODE };
- struct buffer_head *bh;
+ struct buffer_head *bh = NULL;
struct inode *linode = sb_dqopt(sb)->files[type];
struct inode *ginode = NULL;
struct ocfs2_disk_dqheader *dqhead;
int status, ret = 0;
/* First check whether we understand local quota file */
- bh = ocfs2_read_quota_block(linode, 0, &status);
- if (!bh) {
+ status = ocfs2_read_quota_block(linode, 0, &bh);
+ if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
type);
@@ -178,8 +178,8 @@ static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
goto out_err;
}
/* Since the header is read only, we don't care about locking */
- bh = ocfs2_read_quota_block(ginode, 0, &status);
- if (!bh) {
+ status = ocfs2_read_quota_block(ginode, 0, &bh);
+ if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read global quota file header "
"(type=%d)\n", type);
@@ -235,10 +235,11 @@ static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
return -ENOMEM;
}
newchunk->qc_num = i;
- newchunk->qc_headerbh = ocfs2_read_quota_block(inode,
+ newchunk->qc_headerbh = NULL;
+ status = ocfs2_read_quota_block(inode,
ol_quota_chunk_block(inode->i_sb, i),
- &status);
- if (!newchunk->qc_headerbh) {
+ &newchunk->qc_headerbh);
+ if (status) {
mlog_errno(status);
kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
ocfs2_release_local_quota_bitmaps(head);
@@ -320,10 +321,11 @@ static int ocfs2_recovery_load_quota(struct inode *lqinode,
int status = 0;
for (i = 0; i < chunks; i++) {
- hbh = ocfs2_read_quota_block(lqinode,
- ol_quota_chunk_block(sb, i),
- &status);
- if (!hbh) {
+ hbh = NULL;
+ status = ocfs2_read_quota_block(lqinode,
+ ol_quota_chunk_block(sb, i),
+ &hbh);
+ if (status) {
mlog_errno(status);
break;
}
@@ -392,8 +394,9 @@ struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
goto out_put;
}
/* Now read local header */
- bh = ocfs2_read_quota_block(lqinode, 0, &status);
- if (!bh) {
+ bh = NULL;
+ status = ocfs2_read_quota_block(lqinode, 0, &bh);
+ if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read quota file info header "
"(slot=%d type=%d)\n", slot_num, type);
@@ -447,19 +450,21 @@ static int ocfs2_recover_local_quota_file(struct inode *lqinode,
list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
chunk = rchunk->rc_chunk;
- hbh = ocfs2_read_quota_block(lqinode,
- ol_quota_chunk_block(sb, chunk),
- &status);
- if (!hbh) {
+ hbh = NULL;
+ status = ocfs2_read_quota_block(lqinode,
+ ol_quota_chunk_block(sb, chunk),
+ &hbh);
+ if (status) {
mlog_errno(status);
break;
}
dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
for_each_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
- qbh = ocfs2_read_quota_block(lqinode,
+ qbh = NULL;
+ status = ocfs2_read_quota_block(lqinode,
ol_dqblk_block(sb, chunk, bit),
- &status);
- if (!qbh) {
+ &qbh);
+ if (status) {
mlog_errno(status);
break;
}
@@ -581,8 +586,9 @@ int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
goto out_put;
}
/* Now read local header */
- bh = ocfs2_read_quota_block(lqinode, 0, &status);
- if (!bh) {
+ bh = NULL;
+ status = ocfs2_read_quota_block(lqinode, 0, &bh);
+ if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read quota file info header "
"(slot=%d type=%d)\n", slot_num, type);
@@ -676,8 +682,8 @@ static int ocfs2_local_read_info(struct super_block *sb, int type)
locked = 1;
/* Now read local header */
- bh = ocfs2_read_quota_block(lqinode, 0, &status);
- if (!bh) {
+ status = ocfs2_read_quota_block(lqinode, 0, &bh);
+ if (status) {
mlog_errno(status);
mlog(ML_ERROR, "failed to read quota file info header "
"(type=%d)\n", type);
@@ -850,13 +856,13 @@ static int ocfs2_local_write_dquot(struct dquot *dquot)
{
struct super_block *sb = dquot->dq_sb;
struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
- struct buffer_head *bh;
+ struct buffer_head *bh = NULL;
int status;
- bh = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type],
+ status = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type],
ol_dqblk_file_block(sb, od->dq_local_off),
- &status);
- if (!bh) {
+ &bh);
+ if (status) {
mlog_errno(status);
goto out;
}