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ocfs2: Initialize blocks allocated to local quota file

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When we extend local quota file, we should initialize data
in newly allocated block. Firstly because on recovery we could
parse bogus data, secondly so that block checksums are properly
computed.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Jan Kara 2009-07-22 13:17:17 +02:00 committed by Joel Becker
parent 4b3fa1904c
commit 0e7f387bf3
1 changed files with 91 additions and 23 deletions
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114
fs/ocfs2/quota_local.c
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@ -941,7 +941,7 @@ static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
struct ocfs2_local_disk_chunk *dchunk;
int status;
handle_t *handle;
struct buffer_head *bh = NULL;
struct buffer_head *bh = NULL, *dbh = NULL;
u64 p_blkno;
/* We are protected by dqio_sem so no locking needed */
@ -965,34 +965,32 @@ static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
mlog_errno(status);
goto out;
}
down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
&p_blkno, NULL, NULL);
up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
if (status < 0) {
mlog_errno(status);
goto out;
}
bh = sb_getblk(sb, p_blkno);
if (!bh) {
status = -ENOMEM;
mlog_errno(status);
goto out;
}
ocfs2_set_new_buffer_uptodate(lqinode, bh);
dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
handle = ocfs2_start_trans(OCFS2_SB(sb), 3);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto out;
}
/* Initialize chunk header */
down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
&p_blkno, NULL, NULL);
up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
bh = sb_getblk(sb, p_blkno);
if (!bh) {
status = -ENOMEM;
mlog_errno(status);
goto out_trans;
}
dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
ocfs2_set_new_buffer_uptodate(lqinode, bh);
status = ocfs2_journal_access_dq(handle, lqinode, bh,
OCFS2_JOURNAL_ACCESS_WRITE);
OCFS2_JOURNAL_ACCESS_CREATE);
if (status < 0) {
mlog_errno(status);
goto out_trans;
@ -1009,6 +1007,38 @@ static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
goto out_trans;
}
/* Initialize new block with structures */
down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
&p_blkno, NULL, NULL);
up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
dbh = sb_getblk(sb, p_blkno);
if (!dbh) {
status = -ENOMEM;
mlog_errno(status);
goto out_trans;
}
ocfs2_set_new_buffer_uptodate(lqinode, dbh);
status = ocfs2_journal_access_dq(handle, lqinode, dbh,
OCFS2_JOURNAL_ACCESS_CREATE);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
lock_buffer(dbh);
memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
unlock_buffer(dbh);
status = ocfs2_journal_dirty(handle, dbh);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
/* Update local quotafile info */
oinfo->dqi_blocks += 2;
oinfo->dqi_chunks++;
status = ocfs2_local_write_info(sb, type);
@ -1033,6 +1063,7 @@ static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
ocfs2_commit_trans(OCFS2_SB(sb), handle);
out:
brelse(bh);
brelse(dbh);
kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
return ERR_PTR(status);
}
@ -1050,6 +1081,8 @@ static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
struct ocfs2_local_disk_chunk *dchunk;
int epb = ol_quota_entries_per_block(sb);
unsigned int chunk_blocks;
struct buffer_head *bh;
u64 p_blkno;
int status;
handle_t *handle;
@ -1077,12 +1110,46 @@ static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
mlog_errno(status);
goto out;
}
handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
/* Get buffer from the just added block */
down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
&p_blkno, NULL, NULL);
up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
if (status < 0) {
mlog_errno(status);
goto out;
}
bh = sb_getblk(sb, p_blkno);
if (!bh) {
status = -ENOMEM;
mlog_errno(status);
goto out;
}
ocfs2_set_new_buffer_uptodate(lqinode, bh);
handle = ocfs2_start_trans(OCFS2_SB(sb), 3);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto out;
}
/* Zero created block */
status = ocfs2_journal_access_dq(handle, lqinode, bh,
OCFS2_JOURNAL_ACCESS_CREATE);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
lock_buffer(bh);
memset(bh->b_data, 0, sb->s_blocksize);
unlock_buffer(bh);
status = ocfs2_journal_dirty(handle, bh);
if (status < 0) {
mlog_errno(status);
goto out_trans;
}
/* Update chunk header */
status = ocfs2_journal_access_dq(handle, lqinode, chunk->qc_headerbh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
@ -1099,6 +1166,7 @@ static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
mlog_errno(status);
goto out_trans;
}
/* Update file header */
oinfo->dqi_blocks++;
status = ocfs2_local_write_info(sb, type);
if (status < 0) {