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Diffstat (limited to 'fs/ocfs2/quota_local.c')
-rw-r--r--fs/ocfs2/quota_local.c425
1 files changed, 417 insertions, 8 deletions
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index 40e82b483136..b98562174cd0 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -49,14 +49,25 @@ static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
return 1 + (ol_chunk_blocks(sb) + 1) * c;
}
-/* Offset of the dquot structure in the quota file */
-static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
+static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
+{
+ int epb = ol_quota_entries_per_block(sb);
+
+ return ol_quota_chunk_block(sb, c) + 1 + off / epb;
+}
+
+static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
{
int epb = ol_quota_entries_per_block(sb);
- return ((ol_quota_chunk_block(sb, c) + 1 + off / epb)
- << sb->s_blocksize_bits) +
- (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
+ return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
+}
+
+/* Offset of the dquot structure in the quota file */
+static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
+{
+ return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
+ ol_dqblk_block_off(sb, c, off);
}
/* Compute block number from given offset */
@@ -253,6 +264,379 @@ static void olq_update_info(struct buffer_head *bh, void *private)
spin_unlock(&dq_data_lock);
}
+static int ocfs2_add_recovery_chunk(struct super_block *sb,
+ struct ocfs2_local_disk_chunk *dchunk,
+ int chunk,
+ struct list_head *head)
+{
+ struct ocfs2_recovery_chunk *rc;
+
+ rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
+ if (!rc)
+ return -ENOMEM;
+ rc->rc_chunk = chunk;
+ rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
+ if (!rc->rc_bitmap) {
+ kfree(rc);
+ return -ENOMEM;
+ }
+ memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
+ (ol_chunk_entries(sb) + 7) >> 3);
+ list_add_tail(&rc->rc_list, head);
+ return 0;
+}
+
+static void free_recovery_list(struct list_head *head)
+{
+ struct ocfs2_recovery_chunk *next;
+ struct ocfs2_recovery_chunk *rchunk;
+
+ list_for_each_entry_safe(rchunk, next, head, rc_list) {
+ list_del(&rchunk->rc_list);
+ kfree(rchunk->rc_bitmap);
+ kfree(rchunk);
+ }
+}
+
+void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
+{
+ int type;
+
+ for (type = 0; type < MAXQUOTAS; type++)
+ free_recovery_list(&(rec->r_list[type]));
+ kfree(rec);
+}
+
+/* Load entries in our quota file we have to recover*/
+static int ocfs2_recovery_load_quota(struct inode *lqinode,
+ struct ocfs2_local_disk_dqinfo *ldinfo,
+ int type,
+ struct list_head *head)
+{
+ struct super_block *sb = lqinode->i_sb;
+ struct buffer_head *hbh;
+ struct ocfs2_local_disk_chunk *dchunk;
+ int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
+ int status = 0;
+
+ for (i = 0; i < chunks; i++) {
+ hbh = ocfs2_read_quota_block(lqinode,
+ ol_quota_chunk_block(sb, i),
+ &status);
+ if (!hbh) {
+ mlog_errno(status);
+ break;
+ }
+ dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
+ if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
+ status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
+ brelse(hbh);
+ if (status < 0)
+ break;
+ }
+ if (status < 0)
+ free_recovery_list(head);
+ return status;
+}
+
+static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
+{
+ int type;
+ struct ocfs2_quota_recovery *rec;
+
+ rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
+ if (!rec)
+ return NULL;
+ for (type = 0; type < MAXQUOTAS; type++)
+ INIT_LIST_HEAD(&(rec->r_list[type]));
+ return rec;
+}
+
+/* Load information we need for quota recovery into memory */
+struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
+ struct ocfs2_super *osb,
+ int slot_num)
+{
+ unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
+ unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
+ LOCAL_GROUP_QUOTA_SYSTEM_INODE };
+ struct super_block *sb = osb->sb;
+ struct ocfs2_local_disk_dqinfo *ldinfo;
+ struct inode *lqinode;
+ struct buffer_head *bh;
+ int type;
+ int status = 0;
+ struct ocfs2_quota_recovery *rec;
+
+ mlog(ML_NOTICE, "Beginning quota recovery in slot %u\n", slot_num);
+ rec = ocfs2_alloc_quota_recovery();
+ if (!rec)
+ return ERR_PTR(-ENOMEM);
+ /* First init... */
+
+ for (type = 0; type < MAXQUOTAS; type++) {
+ if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
+ continue;
+ /* At this point, journal of the slot is already replayed so
+ * we can trust metadata and data of the quota file */
+ lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
+ if (!lqinode) {
+ status = -ENOENT;
+ goto out;
+ }
+ status = ocfs2_inode_lock_full(lqinode, NULL, 1,
+ OCFS2_META_LOCK_RECOVERY);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out_put;
+ }
+ /* Now read local header */
+ bh = ocfs2_read_quota_block(lqinode, 0, &status);
+ if (!bh) {
+ mlog_errno(status);
+ mlog(ML_ERROR, "failed to read quota file info header "
+ "(slot=%d type=%d)\n", slot_num, type);
+ goto out_lock;
+ }
+ ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
+ OCFS2_LOCAL_INFO_OFF);
+ status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
+ &rec->r_list[type]);
+ brelse(bh);
+out_lock:
+ ocfs2_inode_unlock(lqinode, 1);
+out_put:
+ iput(lqinode);
+ if (status < 0)
+ break;
+ }
+out:
+ if (status < 0) {
+ ocfs2_free_quota_recovery(rec);
+ rec = ERR_PTR(status);
+ }
+ return rec;
+}
+
+/* Sync changes in local quota file into global quota file and
+ * reinitialize local quota file.
+ * The function expects local quota file to be already locked and
+ * dqonoff_mutex locked. */
+static int ocfs2_recover_local_quota_file(struct inode *lqinode,
+ int type,
+ struct ocfs2_quota_recovery *rec)
+{
+ struct super_block *sb = lqinode->i_sb;
+ struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
+ struct ocfs2_local_disk_chunk *dchunk;
+ struct ocfs2_local_disk_dqblk *dqblk;
+ struct dquot *dquot;
+ handle_t *handle;
+ struct buffer_head *hbh = NULL, *qbh = NULL;
+ int status = 0;
+ int bit, chunk;
+ struct ocfs2_recovery_chunk *rchunk, *next;
+ qsize_t spacechange, inodechange;
+
+ mlog_entry("ino=%lu type=%u", (unsigned long)lqinode->i_ino, type);
+
+ status = ocfs2_lock_global_qf(oinfo, 1);
+ if (status < 0)
+ goto out;
+
+ 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) {
+ 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,
+ ol_dqblk_block(sb, chunk, bit),
+ &status);
+ if (!qbh) {
+ mlog_errno(status);
+ break;
+ }
+ dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
+ ol_dqblk_block_off(sb, chunk, bit));
+ dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
+ if (!dquot) {
+ status = -EIO;
+ mlog(ML_ERROR, "Failed to get quota structure "
+ "for id %u, type %d. Cannot finish quota "
+ "file recovery.\n",
+ (unsigned)le64_to_cpu(dqblk->dqb_id),
+ type);
+ goto out_put_bh;
+ }
+ handle = ocfs2_start_trans(OCFS2_SB(sb),
+ OCFS2_QSYNC_CREDITS);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ mlog_errno(status);
+ goto out_put_dquot;
+ }
+ mutex_lock(&sb_dqopt(sb)->dqio_mutex);
+ spin_lock(&dq_data_lock);
+ /* Add usage from quota entry into quota changes
+ * of our node. Auxiliary variables are important
+ * due to signedness */
+ spacechange = le64_to_cpu(dqblk->dqb_spacemod);
+ inodechange = le64_to_cpu(dqblk->dqb_inodemod);
+ dquot->dq_dqb.dqb_curspace += spacechange;
+ dquot->dq_dqb.dqb_curinodes += inodechange;
+ spin_unlock(&dq_data_lock);
+ /* We want to drop reference held by the crashed
+ * node. Since we have our own reference we know
+ * global structure actually won't be freed. */
+ status = ocfs2_global_release_dquot(dquot);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out_commit;
+ }
+ /* Release local quota file entry */
+ status = ocfs2_journal_access(handle, lqinode,
+ qbh, OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out_commit;
+ }
+ lock_buffer(qbh);
+ WARN_ON(!ocfs2_test_bit(bit, dchunk->dqc_bitmap));
+ ocfs2_clear_bit(bit, dchunk->dqc_bitmap);
+ le32_add_cpu(&dchunk->dqc_free, 1);
+ unlock_buffer(qbh);
+ status = ocfs2_journal_dirty(handle, qbh);
+ if (status < 0)
+ mlog_errno(status);
+out_commit:
+ mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
+ ocfs2_commit_trans(OCFS2_SB(sb), handle);
+out_put_dquot:
+ dqput(dquot);
+out_put_bh:
+ brelse(qbh);
+ if (status < 0)
+ break;
+ }
+ brelse(hbh);
+ list_del(&rchunk->rc_list);
+ kfree(rchunk->rc_bitmap);
+ kfree(rchunk);
+ if (status < 0)
+ break;
+ }
+ ocfs2_unlock_global_qf(oinfo, 1);
+out:
+ if (status < 0)
+ free_recovery_list(&(rec->r_list[type]));
+ mlog_exit(status);
+ return status;
+}
+
+/* Recover local quota files for given node different from us */
+int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
+ struct ocfs2_quota_recovery *rec,
+ int slot_num)
+{
+ unsigned int ino[MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
+ LOCAL_GROUP_QUOTA_SYSTEM_INODE };
+ struct super_block *sb = osb->sb;
+ struct ocfs2_local_disk_dqinfo *ldinfo;
+ struct buffer_head *bh;
+ handle_t *handle;
+ int type;
+ int status = 0;
+ struct inode *lqinode;
+ unsigned int flags;
+
+ mlog(ML_NOTICE, "Finishing quota recovery in slot %u\n", slot_num);
+ mutex_lock(&sb_dqopt(sb)->dqonoff_mutex);
+ for (type = 0; type < MAXQUOTAS; type++) {
+ if (list_empty(&(rec->r_list[type])))
+ continue;
+ mlog(0, "Recovering quota in slot %d\n", slot_num);
+ lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
+ if (!lqinode) {
+ status = -ENOENT;
+ goto out;
+ }
+ status = ocfs2_inode_lock_full(lqinode, NULL, 1,
+ OCFS2_META_LOCK_NOQUEUE);
+ /* Someone else is holding the lock? Then he must be
+ * doing the recovery. Just skip the file... */
+ if (status == -EAGAIN) {
+ mlog(ML_NOTICE, "skipping quota recovery for slot %d "
+ "because quota file is locked.\n", slot_num);
+ status = 0;
+ goto out_put;
+ } else if (status < 0) {
+ mlog_errno(status);
+ goto out_put;
+ }
+ /* Now read local header */
+ bh = ocfs2_read_quota_block(lqinode, 0, &status);
+ if (!bh) {
+ mlog_errno(status);
+ mlog(ML_ERROR, "failed to read quota file info header "
+ "(slot=%d type=%d)\n", slot_num, type);
+ goto out_lock;
+ }
+ ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
+ OCFS2_LOCAL_INFO_OFF);
+ /* Is recovery still needed? */
+ flags = le32_to_cpu(ldinfo->dqi_flags);
+ if (!(flags & OLQF_CLEAN))
+ status = ocfs2_recover_local_quota_file(lqinode,
+ type,
+ rec);
+ /* We don't want to mark file as clean when it is actually
+ * active */
+ if (slot_num == osb->slot_num)
+ goto out_bh;
+ /* Mark quota file as clean if we are recovering quota file of
+ * some other node. */
+ handle = ocfs2_start_trans(osb, 1);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ mlog_errno(status);
+ goto out_bh;
+ }
+ status = ocfs2_journal_access(handle, lqinode, bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out_trans;
+ }
+ lock_buffer(bh);
+ ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
+ unlock_buffer(bh);
+ status = ocfs2_journal_dirty(handle, bh);
+ if (status < 0)
+ mlog_errno(status);
+out_trans:
+ ocfs2_commit_trans(osb, handle);
+out_bh:
+ brelse(bh);
+out_lock:
+ ocfs2_inode_unlock(lqinode, 1);
+out_put:
+ iput(lqinode);
+ if (status < 0)
+ break;
+ }
+out:
+ mutex_unlock(&sb_dqopt(sb)->dqonoff_mutex);
+ kfree(rec);
+ return status;
+}
+
/* Read information header from quota file */
static int ocfs2_local_read_info(struct super_block *sb, int type)
{
@@ -262,6 +646,7 @@ static int ocfs2_local_read_info(struct super_block *sb, int type)
struct inode *lqinode = sb_dqopt(sb)->files[type];
int status;
struct buffer_head *bh = NULL;
+ struct ocfs2_quota_recovery *rec;
int locked = 0;
info->dqi_maxblimit = 0x7fffffffffffffffLL;
@@ -275,6 +660,7 @@ static int ocfs2_local_read_info(struct super_block *sb, int type)
info->dqi_priv = oinfo;
oinfo->dqi_type = type;
INIT_LIST_HEAD(&oinfo->dqi_chunk);
+ oinfo->dqi_rec = NULL;
oinfo->dqi_lqi_bh = NULL;
oinfo->dqi_ibh = NULL;
@@ -305,10 +691,27 @@ static int ocfs2_local_read_info(struct super_block *sb, int type)
oinfo->dqi_ibh = bh;
/* We crashed when using local quota file? */
- if (!(info->dqi_flags & OLQF_CLEAN))
- goto out_err; /* So far we just bail out. Later we should resync here */
+ if (!(info->dqi_flags & OLQF_CLEAN)) {
+ rec = OCFS2_SB(sb)->quota_rec;
+ if (!rec) {
+ rec = ocfs2_alloc_quota_recovery();
+ if (!rec) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto out_err;
+ }
+ OCFS2_SB(sb)->quota_rec = rec;
+ }
- status = ocfs2_load_local_quota_bitmaps(sb_dqopt(sb)->files[type],
+ status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
+ &rec->r_list[type]);
+ if (status < 0) {
+ mlog_errno(status);
+ goto out_err;
+ }
+ }
+
+ status = ocfs2_load_local_quota_bitmaps(lqinode,
ldinfo,
&oinfo->dqi_chunk);
if (status < 0) {
@@ -394,6 +797,12 @@ static int ocfs2_local_free_info(struct super_block *sb, int type)
}
ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
+ /* dqonoff_mutex protects us against racing with recovery thread... */
+ if (oinfo->dqi_rec) {
+ ocfs2_free_quota_recovery(oinfo->dqi_rec);
+ mark_clean = 0;
+ }
+
if (!mark_clean)
goto out;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 14:58:51 +0100