ocfs2: Fix quota locking
OCFS2 had three issues with quota locking: a) When reading dquot from global quota file, we started a transaction while holding dqio_mutex which is prone to deadlocks because other paths do it the other way around b) During ocfs2_sync_dquot we were not protected against concurrent writers on the same node. Because we first copy data to local buffer, a race could happen resulting in old data being written to global quota file and thus causing quota inconsistency after a crash. c) ip_alloc_sem of quota files was acquired while a transaction is started in ocfs2_quota_write which can deadlock because we first get ip_alloc_sem and then start a transaction when extending quota files. We fix the problem a) by pulling all necessary code to ocfs2_acquire_dquot and ocfs2_release_dquot. Thus we no longer depend on generic dquot_acquire to do the locking and can force proper lock ordering. Problems b) and c) are fixed by locking i_mutex and ip_alloc_sem of global quota file in ocfs2_lock_global_qf and removing ip_alloc_sem from ocfs2_quota_read and ocfs2_quota_write. Acked-by: Joel Becker <Joel.Becker@oracle.com> Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara
parent
ae4f6ef134
commit
fb8dd8d780
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@ -104,10 +104,11 @@ static inline int ocfs2_global_release_dquot(struct dquot *dquot)
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int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
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void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
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int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
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struct buffer_head **bh);
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int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh);
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int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
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struct buffer_head **bh);
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int ocfs2_create_local_dquot(struct dquot *dquot);
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int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
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extern const struct dquot_operations ocfs2_quota_operations;
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extern struct quota_format_type ocfs2_quota_format;
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@ -28,6 +28,41 @@
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#include "buffer_head_io.h"
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#include "quota.h"
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/*
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* Locking of quotas with OCFS2 is rather complex. Here are rules that
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* should be obeyed by all the functions:
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* - any write of quota structure (either to local or global file) is protected
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* by dqio_mutex or dquot->dq_lock.
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* - any modification of global quota file holds inode cluster lock, i_mutex,
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* and ip_alloc_sem of the global quota file (achieved by
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* ocfs2_lock_global_qf). It also has to hold qinfo_lock.
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* - an allocation of new blocks for local quota file is protected by
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* its ip_alloc_sem
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*
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* A rough sketch of locking dependencies (lf = local file, gf = global file):
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* Normal filesystem operation:
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* start_trans -> dqio_mutex -> write to lf
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* Syncing of local and global file:
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* ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
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* write to gf
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* -> write to lf
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* Acquire dquot for the first time:
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* dq_lock -> ocfs2_lock_global_qf -> qinfo_lock -> read from gf
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* -> alloc space for gf
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* -> start_trans -> qinfo_lock -> write to gf
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* -> ip_alloc_sem of lf -> alloc space for lf
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* -> write to lf
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* Release last reference to dquot:
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* dq_lock -> ocfs2_lock_global_qf -> start_trans -> qinfo_lock -> write to gf
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* -> write to lf
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* Note that all the above operations also hold the inode cluster lock of lf.
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* Recovery:
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* inode cluster lock of recovered lf
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* -> read bitmaps -> ip_alloc_sem of lf
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* -> ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
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* write to gf
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*/
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static struct workqueue_struct *ocfs2_quota_wq = NULL;
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static void qsync_work_fn(struct work_struct *work);
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@ -92,8 +127,7 @@ struct qtree_fmt_operations ocfs2_global_ops = {
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.is_id = ocfs2_global_is_id,
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};
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static int ocfs2_validate_quota_block(struct super_block *sb,
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struct buffer_head *bh)
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int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh)
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{
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struct ocfs2_disk_dqtrailer *dqt =
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ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
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@ -111,33 +145,6 @@ static int ocfs2_validate_quota_block(struct super_block *sb,
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return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
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}
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int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
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struct buffer_head **bh)
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{
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int rc = 0;
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struct buffer_head *tmp = *bh;
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if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
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ocfs2_error(inode->i_sb,
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"Quota file %llu is probably corrupted! Requested "
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"to read block %Lu but file has size only %Lu\n",
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(unsigned long long)OCFS2_I(inode)->ip_blkno,
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(unsigned long long)v_block,
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(unsigned long long)i_size_read(inode));
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return -EIO;
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}
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rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
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ocfs2_validate_quota_block);
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if (rc)
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mlog_errno(rc);
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/* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
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if (!rc && !*bh)
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*bh = tmp;
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return rc;
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}
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int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
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struct buffer_head **bhp)
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{
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@ -151,27 +158,6 @@ int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
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return rc;
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}
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static int ocfs2_get_quota_block(struct inode *inode, int block,
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struct buffer_head **bh)
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{
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u64 pblock, pcount;
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int err;
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down_read(&OCFS2_I(inode)->ip_alloc_sem);
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err = ocfs2_extent_map_get_blocks(inode, block, &pblock, &pcount, NULL);
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up_read(&OCFS2_I(inode)->ip_alloc_sem);
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if (err) {
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mlog_errno(err);
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return err;
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}
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*bh = sb_getblk(inode->i_sb, pblock);
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if (!*bh) {
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err = -EIO;
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mlog_errno(err);
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}
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return err;
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}
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/* Read data from global quotafile - avoid pagecache and such because we cannot
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* afford acquiring the locks... We use quota cluster lock to serialize
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* operations. Caller is responsible for acquiring it. */
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@ -186,6 +172,7 @@ ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
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int err = 0;
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struct buffer_head *bh;
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size_t toread, tocopy;
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u64 pblock = 0, pcount = 0;
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if (off > i_size)
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return 0;
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@ -194,8 +181,19 @@ ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
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toread = len;
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while (toread > 0) {
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tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
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if (!pcount) {
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err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock,
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&pcount, NULL);
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if (err) {
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mlog_errno(err);
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return err;
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}
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} else {
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pcount--;
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pblock++;
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}
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bh = NULL;
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err = ocfs2_read_quota_block(gqinode, blk, &bh);
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err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
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if (err) {
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mlog_errno(err);
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return err;
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@ -223,6 +221,7 @@ ssize_t ocfs2_quota_write(struct super_block *sb, int type,
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int err = 0, new = 0, ja_type;
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struct buffer_head *bh = NULL;
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handle_t *handle = journal_current_handle();
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u64 pblock, pcount;
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if (!handle) {
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mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
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@ -235,12 +234,11 @@ ssize_t ocfs2_quota_write(struct super_block *sb, int type,
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len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
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}
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mutex_lock_nested(&gqinode->i_mutex, I_MUTEX_QUOTA);
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if (gqinode->i_size < off + len) {
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loff_t rounded_end =
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ocfs2_align_bytes_to_blocks(sb, off + len);
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/* Space is already allocated in ocfs2_global_read_dquot() */
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/* Space is already allocated in ocfs2_acquire_dquot() */
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err = ocfs2_simple_size_update(gqinode,
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oinfo->dqi_gqi_bh,
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rounded_end);
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@ -248,13 +246,20 @@ ssize_t ocfs2_quota_write(struct super_block *sb, int type,
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goto out;
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new = 1;
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}
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err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL);
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if (err) {
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mlog_errno(err);
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goto out;
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}
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/* Not rewriting whole block? */
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if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
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!new) {
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err = ocfs2_read_quota_block(gqinode, blk, &bh);
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err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
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ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
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} else {
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err = ocfs2_get_quota_block(gqinode, blk, &bh);
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bh = sb_getblk(sb, pblock);
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if (!bh)
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err = -ENOMEM;
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ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
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}
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if (err) {
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@ -279,13 +284,11 @@ ssize_t ocfs2_quota_write(struct super_block *sb, int type,
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brelse(bh);
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out:
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if (err) {
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mutex_unlock(&gqinode->i_mutex);
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mlog_errno(err);
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return err;
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}
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gqinode->i_version++;
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ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
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mutex_unlock(&gqinode->i_mutex);
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return len;
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}
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@ -303,11 +306,23 @@ int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
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else
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WARN_ON(bh != oinfo->dqi_gqi_bh);
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spin_unlock(&dq_data_lock);
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if (ex) {
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mutex_lock(&oinfo->dqi_gqinode->i_mutex);
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down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
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} else {
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down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
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}
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return 0;
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}
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void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
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{
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if (ex) {
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up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
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mutex_unlock(&oinfo->dqi_gqinode->i_mutex);
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} else {
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up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
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}
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ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
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brelse(oinfo->dqi_gqi_bh);
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spin_lock(&dq_data_lock);
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@ -458,75 +473,6 @@ static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type)
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OCFS2_QUOTA_BLOCK_UPDATE_CREDITS;
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}
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/* Read in information from global quota file and acquire a reference to it.
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* dquot_acquire() has already started the transaction and locked quota file */
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int ocfs2_global_read_dquot(struct dquot *dquot)
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{
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int err, err2, ex = 0;
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struct super_block *sb = dquot->dq_sb;
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int type = dquot->dq_type;
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struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
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struct ocfs2_super *osb = OCFS2_SB(sb);
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struct inode *gqinode = info->dqi_gqinode;
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int need_alloc = ocfs2_global_qinit_alloc(sb, type);
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handle_t *handle = NULL;
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err = ocfs2_qinfo_lock(info, 0);
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if (err < 0)
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goto out;
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err = qtree_read_dquot(&info->dqi_gi, dquot);
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if (err < 0)
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goto out_qlock;
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OCFS2_DQUOT(dquot)->dq_use_count++;
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OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
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OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
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ocfs2_qinfo_unlock(info, 0);
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if (!dquot->dq_off) { /* No real quota entry? */
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ex = 1;
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/*
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* Add blocks to quota file before we start a transaction since
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* locking allocators ranks above a transaction start
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*/
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WARN_ON(journal_current_handle());
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down_write(&OCFS2_I(gqinode)->ip_alloc_sem);
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err = ocfs2_extend_no_holes(gqinode,
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gqinode->i_size + (need_alloc << sb->s_blocksize_bits),
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gqinode->i_size);
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up_write(&OCFS2_I(gqinode)->ip_alloc_sem);
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if (err < 0)
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goto out;
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}
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handle = ocfs2_start_trans(osb,
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ocfs2_calc_global_qinit_credits(sb, type));
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if (IS_ERR(handle)) {
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err = PTR_ERR(handle);
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goto out;
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}
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err = ocfs2_qinfo_lock(info, ex);
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if (err < 0)
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goto out_trans;
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err = qtree_write_dquot(&info->dqi_gi, dquot);
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if (ex && info_dirty(sb_dqinfo(dquot->dq_sb, dquot->dq_type))) {
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err2 = __ocfs2_global_write_info(dquot->dq_sb, dquot->dq_type);
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if (!err)
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err = err2;
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}
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out_qlock:
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if (ex)
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ocfs2_qinfo_unlock(info, 1);
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else
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ocfs2_qinfo_unlock(info, 0);
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out_trans:
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if (handle)
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ocfs2_commit_trans(osb, handle);
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out:
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if (err < 0)
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mlog_errno(err);
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return err;
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}
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/* Sync local information about quota modifications with global quota file.
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* Caller must have started the transaction and obtained exclusive lock for
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* global quota file inode */
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@ -742,6 +688,10 @@ static int ocfs2_release_dquot(struct dquot *dquot)
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mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
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mutex_lock(&dquot->dq_lock);
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/* Check whether we are not racing with some other dqget() */
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if (atomic_read(&dquot->dq_count) > 1)
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goto out;
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status = ocfs2_lock_global_qf(oinfo, 1);
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if (status < 0)
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goto out;
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@ -752,30 +702,113 @@ static int ocfs2_release_dquot(struct dquot *dquot)
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mlog_errno(status);
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goto out_ilock;
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}
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status = dquot_release(dquot);
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status = ocfs2_global_release_dquot(dquot);
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if (status < 0) {
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mlog_errno(status);
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goto out_trans;
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}
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status = ocfs2_local_release_dquot(handle, dquot);
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/*
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* If we fail here, we cannot do much as global structure is
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* already released. So just complain...
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*/
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if (status < 0)
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mlog_errno(status);
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clear_bit(DQ_ACTIVE_B, &dquot->dq_flags);
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out_trans:
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ocfs2_commit_trans(osb, handle);
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out_ilock:
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ocfs2_unlock_global_qf(oinfo, 1);
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out:
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mutex_unlock(&dquot->dq_lock);
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mlog_exit(status);
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return status;
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}
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/*
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* Read global dquot structure from disk or create it if it does
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* not exist. Also update use count of the global structure and
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* create structure in node-local quota file.
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*/
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static int ocfs2_acquire_dquot(struct dquot *dquot)
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{
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struct ocfs2_mem_dqinfo *oinfo =
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sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
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int status = 0;
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int status = 0, err;
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int ex = 0;
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struct super_block *sb = dquot->dq_sb;
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struct ocfs2_super *osb = OCFS2_SB(sb);
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int type = dquot->dq_type;
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struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
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struct inode *gqinode = info->dqi_gqinode;
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int need_alloc = ocfs2_global_qinit_alloc(sb, type);
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handle_t *handle;
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mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
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/* We need an exclusive lock, because we're going to update use count
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* and instantiate possibly new dquot structure */
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status = ocfs2_lock_global_qf(oinfo, 1);
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mlog_entry("id=%u, type=%d", dquot->dq_id, type);
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mutex_lock(&dquot->dq_lock);
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/*
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* We need an exclusive lock, because we're going to update use count
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* and instantiate possibly new dquot structure
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*/
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status = ocfs2_lock_global_qf(info, 1);
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if (status < 0)
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goto out;
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status = dquot_acquire(dquot);
|
||||
ocfs2_unlock_global_qf(oinfo, 1);
|
||||
if (!test_bit(DQ_READ_B, &dquot->dq_flags)) {
|
||||
status = ocfs2_qinfo_lock(info, 0);
|
||||
if (status < 0)
|
||||
goto out_dq;
|
||||
status = qtree_read_dquot(&info->dqi_gi, dquot);
|
||||
ocfs2_qinfo_unlock(info, 0);
|
||||
if (status < 0)
|
||||
goto out_dq;
|
||||
}
|
||||
set_bit(DQ_READ_B, &dquot->dq_flags);
|
||||
|
||||
OCFS2_DQUOT(dquot)->dq_use_count++;
|
||||
OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
|
||||
OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
|
||||
if (!dquot->dq_off) { /* No real quota entry? */
|
||||
ex = 1;
|
||||
/*
|
||||
* Add blocks to quota file before we start a transaction since
|
||||
* locking allocators ranks above a transaction start
|
||||
*/
|
||||
WARN_ON(journal_current_handle());
|
||||
status = ocfs2_extend_no_holes(gqinode,
|
||||
gqinode->i_size + (need_alloc << sb->s_blocksize_bits),
|
||||
gqinode->i_size);
|
||||
if (status < 0)
|
||||
goto out_dq;
|
||||
}
|
||||
|
||||
handle = ocfs2_start_trans(osb,
|
||||
ocfs2_calc_global_qinit_credits(sb, type));
|
||||
if (IS_ERR(handle)) {
|
||||
status = PTR_ERR(handle);
|
||||
goto out_dq;
|
||||
}
|
||||
status = ocfs2_qinfo_lock(info, ex);
|
||||
if (status < 0)
|
||||
goto out_trans;
|
||||
status = qtree_write_dquot(&info->dqi_gi, dquot);
|
||||
if (ex && info_dirty(sb_dqinfo(sb, type))) {
|
||||
err = __ocfs2_global_write_info(sb, type);
|
||||
if (!status)
|
||||
status = err;
|
||||
}
|
||||
ocfs2_qinfo_unlock(info, ex);
|
||||
out_trans:
|
||||
ocfs2_commit_trans(osb, handle);
|
||||
out_dq:
|
||||
ocfs2_unlock_global_qf(info, 1);
|
||||
if (status < 0)
|
||||
goto out;
|
||||
|
||||
status = ocfs2_create_local_dquot(dquot);
|
||||
if (status < 0)
|
||||
goto out;
|
||||
set_bit(DQ_ACTIVE_B, &dquot->dq_flags);
|
||||
out:
|
||||
mutex_unlock(&dquot->dq_lock);
|
||||
mlog_exit(status);
|
||||
return status;
|
||||
}
|
||||
|
|
@ -820,7 +853,9 @@ static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
|
|||
mlog_errno(status);
|
||||
goto out_ilock;
|
||||
}
|
||||
mutex_lock(&sb_dqopt(sb)->dqio_mutex);
|
||||
status = ocfs2_sync_dquot(dquot);
|
||||
mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
|
||||
if (status < 0) {
|
||||
mlog_errno(status);
|
||||
goto out_trans;
|
||||
|
|
|
|||
|
|
@ -22,6 +22,7 @@
|
|||
#include "dlmglue.h"
|
||||
#include "quota.h"
|
||||
#include "uptodate.h"
|
||||
#include "super.h"
|
||||
|
||||
/* Number of local quota structures per block */
|
||||
static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
|
||||
|
|
@ -129,6 +130,39 @@ static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
|
|||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Read quota block from a given logical offset.
|
||||
*
|
||||
* This function acquires ip_alloc_sem and thus it must not be called with a
|
||||
* transaction started.
|
||||
*/
|
||||
static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
|
||||
struct buffer_head **bh)
|
||||
{
|
||||
int rc = 0;
|
||||
struct buffer_head *tmp = *bh;
|
||||
|
||||
if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block) {
|
||||
ocfs2_error(inode->i_sb,
|
||||
"Quota file %llu is probably corrupted! Requested "
|
||||
"to read block %Lu but file has size only %Lu\n",
|
||||
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
||||
(unsigned long long)v_block,
|
||||
(unsigned long long)i_size_read(inode));
|
||||
return -EIO;
|
||||
}
|
||||
rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
|
||||
ocfs2_validate_quota_block);
|
||||
if (rc)
|
||||
mlog_errno(rc);
|
||||
|
||||
/* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
|
||||
if (!rc && !*bh)
|
||||
*bh = tmp;
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* Check whether we understand format of quota files */
|
||||
static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
|
||||
{
|
||||
|
|
@ -972,10 +1006,8 @@ static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
|
|||
}
|
||||
|
||||
/* 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;
|
||||
|
|
@ -1003,10 +1035,8 @@ static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
|
|||
ocfs2_journal_dirty(handle, bh);
|
||||
|
||||
/* 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;
|
||||
|
|
@ -1103,10 +1133,8 @@ static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
|
|||
}
|
||||
|
||||
/* 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;
|
||||
|
|
@ -1187,7 +1215,7 @@ static void olq_alloc_dquot(struct buffer_head *bh, void *private)
|
|||
}
|
||||
|
||||
/* Create dquot in the local file for given id */
|
||||
static int ocfs2_create_local_dquot(struct dquot *dquot)
|
||||
int ocfs2_create_local_dquot(struct dquot *dquot)
|
||||
{
|
||||
struct super_block *sb = dquot->dq_sb;
|
||||
int type = dquot->dq_type;
|
||||
|
|
@ -1237,36 +1265,11 @@ out:
|
|||
return status;
|
||||
}
|
||||
|
||||
/* Create entry in local file for dquot, load data from the global file */
|
||||
static int ocfs2_local_read_dquot(struct dquot *dquot)
|
||||
{
|
||||
int status;
|
||||
|
||||
mlog_entry("id=%u, type=%d\n", dquot->dq_id, dquot->dq_type);
|
||||
|
||||
status = ocfs2_global_read_dquot(dquot);
|
||||
if (status < 0) {
|
||||
mlog_errno(status);
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
/* Now create entry in the local quota file */
|
||||
status = ocfs2_create_local_dquot(dquot);
|
||||
if (status < 0) {
|
||||
mlog_errno(status);
|
||||
goto out_err;
|
||||
}
|
||||
mlog_exit(0);
|
||||
return 0;
|
||||
out_err:
|
||||
mlog_exit(status);
|
||||
return status;
|
||||
}
|
||||
|
||||
/* Release dquot structure from local quota file. ocfs2_release_dquot() has
|
||||
* already started a transaction and obtained exclusive lock for global
|
||||
* quota file. */
|
||||
static int ocfs2_local_release_dquot(struct dquot *dquot)
|
||||
/*
|
||||
* Release dquot structure from local quota file. ocfs2_release_dquot() has
|
||||
* already started a transaction and written all changes to global quota file
|
||||
*/
|
||||
int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
|
||||
{
|
||||
int status;
|
||||
int type = dquot->dq_type;
|
||||
|
|
@ -1274,15 +1277,6 @@ static int ocfs2_local_release_dquot(struct dquot *dquot)
|
|||
struct super_block *sb = dquot->dq_sb;
|
||||
struct ocfs2_local_disk_chunk *dchunk;
|
||||
int offset;
|
||||
handle_t *handle = journal_current_handle();
|
||||
|
||||
BUG_ON(!handle);
|
||||
/* First write all local changes to global file */
|
||||
status = ocfs2_global_release_dquot(dquot);
|
||||
if (status < 0) {
|
||||
mlog_errno(status);
|
||||
goto out;
|
||||
}
|
||||
|
||||
status = ocfs2_journal_access_dq(handle,
|
||||
INODE_CACHE(sb_dqopt(sb)->files[type]),
|
||||
|
|
@ -1315,9 +1309,7 @@ static const struct quota_format_ops ocfs2_format_ops = {
|
|||
.read_file_info = ocfs2_local_read_info,
|
||||
.write_file_info = ocfs2_global_write_info,
|
||||
.free_file_info = ocfs2_local_free_info,
|
||||
.read_dqblk = ocfs2_local_read_dquot,
|
||||
.commit_dqblk = ocfs2_local_write_dquot,
|
||||
.release_dqblk = ocfs2_local_release_dquot,
|
||||
};
|
||||
|
||||
struct quota_format_type ocfs2_quota_format = {
|
||||
|
|
|
|||
Reference in New Issue