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@@ -0,0 +1,919 @@
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+/*
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+ * Implementation of operations over global quota file
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+ */
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+#include <linux/fs.h>
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+#include <linux/quota.h>
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+#include <linux/quotaops.h>
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+#include <linux/dqblk_qtree.h>
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+
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+#define MLOG_MASK_PREFIX ML_QUOTA
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+#include <cluster/masklog.h>
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+
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+#include "ocfs2_fs.h"
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+#include "ocfs2.h"
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+#include "alloc.h"
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+#include "inode.h"
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+#include "journal.h"
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+#include "file.h"
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+#include "sysfile.h"
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+#include "dlmglue.h"
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+#include "uptodate.h"
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+#include "quota.h"
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+
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+static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp)
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+{
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+ struct ocfs2_global_disk_dqblk *d = dp;
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+ struct mem_dqblk *m = &dquot->dq_dqb;
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+
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+ /* Update from disk only entries not set by the admin */
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+ if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) {
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+ m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
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+ m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
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+ }
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+ if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
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+ m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
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+ if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) {
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+ m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit);
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+ m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit);
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+ }
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+ if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
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+ m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
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+ if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags))
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+ m->dqb_btime = le64_to_cpu(d->dqb_btime);
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+ if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags))
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+ m->dqb_itime = le64_to_cpu(d->dqb_itime);
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+ OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count);
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+}
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+
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+static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot)
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+{
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+ struct ocfs2_global_disk_dqblk *d = dp;
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+ struct mem_dqblk *m = &dquot->dq_dqb;
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+
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+ d->dqb_id = cpu_to_le32(dquot->dq_id);
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+ d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count);
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+ d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
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+ d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
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+ d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
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+ d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit);
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+ d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit);
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+ d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
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+ d->dqb_btime = cpu_to_le64(m->dqb_btime);
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+ d->dqb_itime = cpu_to_le64(m->dqb_itime);
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+}
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+
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+static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
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+{
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+ struct ocfs2_global_disk_dqblk *d = dp;
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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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+
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+ if (qtree_entry_unused(&oinfo->dqi_gi, dp))
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+ return 0;
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+ return le32_to_cpu(d->dqb_id) == dquot->dq_id;
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+}
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+
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+struct qtree_fmt_operations ocfs2_global_ops = {
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+ .mem2disk_dqblk = ocfs2_global_mem2diskdqb,
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+ .disk2mem_dqblk = ocfs2_global_disk2memdqb,
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+ .is_id = ocfs2_global_is_id,
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+};
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+
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+
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+struct buffer_head *ocfs2_read_quota_block(struct inode *inode,
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+ int block, int *err)
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+{
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+ struct buffer_head *tmp = NULL;
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+
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+ *err = ocfs2_read_virt_blocks(inode, block, 1, &tmp, 0, NULL);
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+ if (*err)
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+ mlog_errno(*err);
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+
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+ return tmp;
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+}
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+
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+static struct buffer_head *ocfs2_get_quota_block(struct inode *inode,
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+ int block, int *err)
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+{
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+ u64 pblock, pcount;
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+ struct buffer_head *bh;
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+
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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,
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+ 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 NULL;
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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 bh;
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+}
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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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+ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
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+ size_t len, loff_t off)
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+{
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+ struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
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+ struct inode *gqinode = oinfo->dqi_gqinode;
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+ loff_t i_size = i_size_read(gqinode);
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+ int offset = off & (sb->s_blocksize - 1);
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+ sector_t blk = off >> sb->s_blocksize_bits;
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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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+
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+ if (off > i_size)
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+ return 0;
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+ if (off + len > i_size)
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+ len = i_size - off;
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+ toread = len;
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+ while (toread > 0) {
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+ tocopy = min((size_t)(sb->s_blocksize - offset), toread);
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+ bh = ocfs2_read_quota_block(gqinode, blk, &err);
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+ if (!bh) {
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+ mlog_errno(err);
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+ return err;
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+ }
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+ memcpy(data, bh->b_data + offset, tocopy);
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+ brelse(bh);
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+ offset = 0;
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+ toread -= tocopy;
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+ data += tocopy;
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+ blk++;
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+ }
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+ return len;
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+}
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+
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+/* Write to quotafile (we know the transaction is already started and has
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+ * enough credits) */
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+ssize_t ocfs2_quota_write(struct super_block *sb, int type,
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+ const char *data, size_t len, loff_t off)
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+{
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+ struct mem_dqinfo *info = sb_dqinfo(sb, type);
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+ struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
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+ struct inode *gqinode = oinfo->dqi_gqinode;
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+ int offset = off & (sb->s_blocksize - 1);
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+ sector_t blk = off >> sb->s_blocksize_bits;
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+ int err = 0, new = 0;
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+ struct buffer_head *bh;
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+ handle_t *handle = journal_current_handle();
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+
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+ if (!handle) {
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+ mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
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+ "because transaction was not started.\n",
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+ (unsigned long long)off, (unsigned long long)len);
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+ return -EIO;
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+ }
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+ if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
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+ WARN_ON(1);
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+ len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
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+ }
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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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+ down_write(&OCFS2_I(gqinode)->ip_alloc_sem);
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+ err = ocfs2_extend_no_holes(gqinode, off + len, off);
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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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+ err = ocfs2_simple_size_update(gqinode,
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+ oinfo->dqi_gqi_bh,
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+ off + len);
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+ if (err < 0)
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+ goto out;
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+ new = 1;
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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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+ bh = ocfs2_read_quota_block(gqinode, blk, &err);
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+ if (!bh) {
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+ mlog_errno(err);
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+ return err;
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+ }
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+ err = ocfs2_journal_access(handle, gqinode, bh,
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+ OCFS2_JOURNAL_ACCESS_WRITE);
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+ } else {
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+ bh = ocfs2_get_quota_block(gqinode, blk, &err);
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+ if (!bh) {
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+ mlog_errno(err);
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+ return err;
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+ }
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+ err = ocfs2_journal_access(handle, gqinode, bh,
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+ OCFS2_JOURNAL_ACCESS_CREATE);
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+ }
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+ if (err < 0) {
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+ brelse(bh);
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+ goto out;
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+ }
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+ lock_buffer(bh);
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+ if (new)
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+ memset(bh->b_data, 0, sb->s_blocksize);
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+ memcpy(bh->b_data + offset, data, len);
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+ flush_dcache_page(bh->b_page);
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+ unlock_buffer(bh);
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+ ocfs2_set_buffer_uptodate(gqinode, bh);
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+ err = ocfs2_journal_dirty(handle, bh);
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+ brelse(bh);
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+ if (err < 0)
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+ goto out;
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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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+
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+int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
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+{
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+ int status;
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+ struct buffer_head *bh = NULL;
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+
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+ status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
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+ if (status < 0)
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+ return status;
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+ spin_lock(&dq_data_lock);
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+ if (!oinfo->dqi_gqi_count++)
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+ oinfo->dqi_gqi_bh = bh;
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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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+ return 0;
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+}
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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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+ 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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+ if (!--oinfo->dqi_gqi_count)
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+ oinfo->dqi_gqi_bh = NULL;
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+ spin_unlock(&dq_data_lock);
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+}
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+
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+/* Read information header from global quota file */
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+int ocfs2_global_read_info(struct super_block *sb, int type)
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+{
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+ struct inode *gqinode = NULL;
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+ unsigned int ino[MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
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+ GROUP_QUOTA_SYSTEM_INODE };
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+ struct ocfs2_global_disk_dqinfo dinfo;
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+ struct mem_dqinfo *info = sb_dqinfo(sb, type);
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+ struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
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+ int status;
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+
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+ mlog_entry_void();
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+
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+ /* Read global header */
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+ gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
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+ OCFS2_INVALID_SLOT);
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+ if (!gqinode) {
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+ mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
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+ type);
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+ status = -EINVAL;
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+ goto out_err;
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+ }
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+ oinfo->dqi_gi.dqi_sb = sb;
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+ oinfo->dqi_gi.dqi_type = type;
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+ ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
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+ oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
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+ oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
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+ oinfo->dqi_gqi_bh = NULL;
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+ oinfo->dqi_gqi_count = 0;
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+ oinfo->dqi_gqinode = gqinode;
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+ status = ocfs2_lock_global_qf(oinfo, 0);
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+ if (status < 0) {
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+ mlog_errno(status);
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+ goto out_err;
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+ }
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+ status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
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+ sizeof(struct ocfs2_global_disk_dqinfo),
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+ OCFS2_GLOBAL_INFO_OFF);
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+ ocfs2_unlock_global_qf(oinfo, 0);
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+ if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
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+ mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
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+ status);
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+ if (status >= 0)
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+ status = -EIO;
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+ mlog_errno(status);
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+ goto out_err;
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+ }
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+ info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
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+ info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
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+ oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
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+ oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
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+ oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
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+ oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
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+ oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
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+ oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
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+ OCFS2_QBLK_RESERVED_SPACE;
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+ oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
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+out_err:
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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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+/* Write information to global quota file. Expects exlusive lock on quota
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+ * file inode and quota info */
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+static int __ocfs2_global_write_info(struct super_block *sb, int type)
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+{
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+ struct mem_dqinfo *info = sb_dqinfo(sb, type);
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+ struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
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+ struct ocfs2_global_disk_dqinfo dinfo;
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+ ssize_t size;
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+
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+ spin_lock(&dq_data_lock);
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+ info->dqi_flags &= ~DQF_INFO_DIRTY;
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+ dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
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+ dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
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+ spin_unlock(&dq_data_lock);
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+ dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms);
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+ dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks);
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+ dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk);
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+ dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry);
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+ size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
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+ sizeof(struct ocfs2_global_disk_dqinfo),
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|
|
+ OCFS2_GLOBAL_INFO_OFF);
|
|
|
+ if (size != sizeof(struct ocfs2_global_disk_dqinfo)) {
|
|
|
+ mlog(ML_ERROR, "Cannot write global quota info structure\n");
|
|
|
+ if (size >= 0)
|
|
|
+ size = -EIO;
|
|
|
+ return size;
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+int ocfs2_global_write_info(struct super_block *sb, int type)
|
|
|
+{
|
|
|
+ int err;
|
|
|
+ struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
|
|
|
+
|
|
|
+ err = ocfs2_qinfo_lock(info, 1);
|
|
|
+ if (err < 0)
|
|
|
+ return err;
|
|
|
+ err = __ocfs2_global_write_info(sb, type);
|
|
|
+ ocfs2_qinfo_unlock(info, 1);
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+/* Read in information from global quota file and acquire a reference to it.
|
|
|
+ * dquot_acquire() has already started the transaction and locked quota file */
|
|
|
+int ocfs2_global_read_dquot(struct dquot *dquot)
|
|
|
+{
|
|
|
+ int err, err2, ex = 0;
|
|
|
+ struct ocfs2_mem_dqinfo *info =
|
|
|
+ sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
|
|
|
+
|
|
|
+ err = ocfs2_qinfo_lock(info, 0);
|
|
|
+ if (err < 0)
|
|
|
+ goto out;
|
|
|
+ err = qtree_read_dquot(&info->dqi_gi, dquot);
|
|
|
+ if (err < 0)
|
|
|
+ goto out_qlock;
|
|
|
+ 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? */
|
|
|
+ /* Upgrade to exclusive lock for allocation */
|
|
|
+ err = ocfs2_qinfo_lock(info, 1);
|
|
|
+ if (err < 0)
|
|
|
+ goto out_qlock;
|
|
|
+ ex = 1;
|
|
|
+ }
|
|
|
+ err = qtree_write_dquot(&info->dqi_gi, dquot);
|
|
|
+ if (ex && info_dirty(sb_dqinfo(dquot->dq_sb, dquot->dq_type))) {
|
|
|
+ err2 = __ocfs2_global_write_info(dquot->dq_sb, dquot->dq_type);
|
|
|
+ if (!err)
|
|
|
+ err = err2;
|
|
|
+ }
|
|
|
+out_qlock:
|
|
|
+ if (ex)
|
|
|
+ ocfs2_qinfo_unlock(info, 1);
|
|
|
+ ocfs2_qinfo_unlock(info, 0);
|
|
|
+out:
|
|
|
+ if (err < 0)
|
|
|
+ mlog_errno(err);
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+/* Sync local information about quota modifications with global quota file.
|
|
|
+ * Caller must have started the transaction and obtained exclusive lock for
|
|
|
+ * global quota file inode */
|
|
|
+int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
|
|
|
+{
|
|
|
+ int err, err2;
|
|
|
+ struct super_block *sb = dquot->dq_sb;
|
|
|
+ int type = dquot->dq_type;
|
|
|
+ struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
|
|
|
+ struct ocfs2_global_disk_dqblk dqblk;
|
|
|
+ s64 spacechange, inodechange;
|
|
|
+ time_t olditime, oldbtime;
|
|
|
+
|
|
|
+ err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
|
|
|
+ sizeof(struct ocfs2_global_disk_dqblk),
|
|
|
+ dquot->dq_off);
|
|
|
+ if (err != sizeof(struct ocfs2_global_disk_dqblk)) {
|
|
|
+ if (err >= 0) {
|
|
|
+ mlog(ML_ERROR, "Short read from global quota file "
|
|
|
+ "(%u read)\n", err);
|
|
|
+ err = -EIO;
|
|
|
+ }
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Update space and inode usage. Get also other information from
|
|
|
+ * global quota file so that we don't overwrite any changes there.
|
|
|
+ * We are */
|
|
|
+ spin_lock(&dq_data_lock);
|
|
|
+ spacechange = dquot->dq_dqb.dqb_curspace -
|
|
|
+ OCFS2_DQUOT(dquot)->dq_origspace;
|
|
|
+ inodechange = dquot->dq_dqb.dqb_curinodes -
|
|
|
+ OCFS2_DQUOT(dquot)->dq_originodes;
|
|
|
+ olditime = dquot->dq_dqb.dqb_itime;
|
|
|
+ oldbtime = dquot->dq_dqb.dqb_btime;
|
|
|
+ ocfs2_global_disk2memdqb(dquot, &dqblk);
|
|
|
+ mlog(0, "Syncing global dquot %d space %lld+%lld, inodes %lld+%lld\n",
|
|
|
+ dquot->dq_id, dquot->dq_dqb.dqb_curspace, spacechange,
|
|
|
+ dquot->dq_dqb.dqb_curinodes, inodechange);
|
|
|
+ if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
|
|
|
+ dquot->dq_dqb.dqb_curspace += spacechange;
|
|
|
+ if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
|
|
|
+ dquot->dq_dqb.dqb_curinodes += inodechange;
|
|
|
+ /* Set properly space grace time... */
|
|
|
+ if (dquot->dq_dqb.dqb_bsoftlimit &&
|
|
|
+ dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) {
|
|
|
+ if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) &&
|
|
|
+ oldbtime > 0) {
|
|
|
+ if (dquot->dq_dqb.dqb_btime > 0)
|
|
|
+ dquot->dq_dqb.dqb_btime =
|
|
|
+ min(dquot->dq_dqb.dqb_btime, oldbtime);
|
|
|
+ else
|
|
|
+ dquot->dq_dqb.dqb_btime = oldbtime;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ dquot->dq_dqb.dqb_btime = 0;
|
|
|
+ clear_bit(DQ_BLKS_B, &dquot->dq_flags);
|
|
|
+ }
|
|
|
+ /* Set properly inode grace time... */
|
|
|
+ if (dquot->dq_dqb.dqb_isoftlimit &&
|
|
|
+ dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) {
|
|
|
+ if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) &&
|
|
|
+ olditime > 0) {
|
|
|
+ if (dquot->dq_dqb.dqb_itime > 0)
|
|
|
+ dquot->dq_dqb.dqb_itime =
|
|
|
+ min(dquot->dq_dqb.dqb_itime, olditime);
|
|
|
+ else
|
|
|
+ dquot->dq_dqb.dqb_itime = olditime;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ dquot->dq_dqb.dqb_itime = 0;
|
|
|
+ clear_bit(DQ_INODES_B, &dquot->dq_flags);
|
|
|
+ }
|
|
|
+ /* All information is properly updated, clear the flags */
|
|
|
+ __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
|
|
|
+ __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
|
|
|
+ __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
|
|
|
+ __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
|
|
|
+ __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
|
|
|
+ __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
|
|
|
+ OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace;
|
|
|
+ OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes;
|
|
|
+ spin_unlock(&dq_data_lock);
|
|
|
+ err = ocfs2_qinfo_lock(info, freeing);
|
|
|
+ if (err < 0) {
|
|
|
+ mlog(ML_ERROR, "Failed to lock quota info, loosing quota write"
|
|
|
+ " (type=%d, id=%u)\n", dquot->dq_type,
|
|
|
+ (unsigned)dquot->dq_id);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ if (freeing)
|
|
|
+ OCFS2_DQUOT(dquot)->dq_use_count--;
|
|
|
+ err = qtree_write_dquot(&info->dqi_gi, dquot);
|
|
|
+ if (err < 0)
|
|
|
+ goto out_qlock;
|
|
|
+ if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) {
|
|
|
+ err = qtree_release_dquot(&info->dqi_gi, dquot);
|
|
|
+ if (info_dirty(sb_dqinfo(sb, type))) {
|
|
|
+ err2 = __ocfs2_global_write_info(sb, type);
|
|
|
+ if (!err)
|
|
|
+ err = err2;
|
|
|
+ }
|
|
|
+ }
|
|
|
+out_qlock:
|
|
|
+ ocfs2_qinfo_unlock(info, freeing);
|
|
|
+out:
|
|
|
+ if (err < 0)
|
|
|
+ mlog_errno(err);
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Wrappers for generic quota functions
|
|
|
+ */
|
|
|
+
|
|
|
+static int ocfs2_write_dquot(struct dquot *dquot)
|
|
|
+{
|
|
|
+ handle_t *handle;
|
|
|
+ struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
|
|
|
+ int status = 0;
|
|
|
+
|
|
|
+ mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
|
|
|
+
|
|
|
+ handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ status = PTR_ERR(handle);
|
|
|
+ mlog_errno(status);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ status = dquot_commit(dquot);
|
|
|
+ ocfs2_commit_trans(osb, handle);
|
|
|
+out:
|
|
|
+ mlog_exit(status);
|
|
|
+ return status;
|
|
|
+}
|
|
|
+
|
|
|
+int ocfs2_calc_qdel_credits(struct super_block *sb, int type)
|
|
|
+{
|
|
|
+ struct ocfs2_mem_dqinfo *oinfo;
|
|
|
+ int features[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
|
|
|
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA };
|
|
|
+
|
|
|
+ if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, features[type]))
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
|
+ /* We modify tree, leaf block, global info, local chunk header,
|
|
|
+ * global and local inode */
|
|
|
+ return oinfo->dqi_gi.dqi_qtree_depth + 2 + 1 +
|
|
|
+ 2 * OCFS2_INODE_UPDATE_CREDITS;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_release_dquot(struct dquot *dquot)
|
|
|
+{
|
|
|
+ handle_t *handle;
|
|
|
+ struct ocfs2_mem_dqinfo *oinfo =
|
|
|
+ sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
|
|
|
+ struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
|
|
|
+ int status = 0;
|
|
|
+
|
|
|
+ mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
|
|
|
+
|
|
|
+ status = ocfs2_lock_global_qf(oinfo, 1);
|
|
|
+ if (status < 0)
|
|
|
+ goto out;
|
|
|
+ handle = ocfs2_start_trans(osb,
|
|
|
+ ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type));
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ status = PTR_ERR(handle);
|
|
|
+ mlog_errno(status);
|
|
|
+ goto out_ilock;
|
|
|
+ }
|
|
|
+ status = dquot_release(dquot);
|
|
|
+ ocfs2_commit_trans(osb, handle);
|
|
|
+out_ilock:
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 1);
|
|
|
+out:
|
|
|
+ mlog_exit(status);
|
|
|
+ return status;
|
|
|
+}
|
|
|
+
|
|
|
+int ocfs2_calc_qinit_credits(struct super_block *sb, int type)
|
|
|
+{
|
|
|
+ struct ocfs2_mem_dqinfo *oinfo;
|
|
|
+ int features[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
|
|
|
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA };
|
|
|
+ struct ocfs2_dinode *lfe, *gfe;
|
|
|
+
|
|
|
+ if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, features[type]))
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
|
+ gfe = (struct ocfs2_dinode *)oinfo->dqi_gqi_bh->b_data;
|
|
|
+ lfe = (struct ocfs2_dinode *)oinfo->dqi_lqi_bh->b_data;
|
|
|
+ /* We can extend local file + global file. In local file we
|
|
|
+ * can modify info, chunk header block and dquot block. In
|
|
|
+ * global file we can modify info, tree and leaf block */
|
|
|
+ return ocfs2_calc_extend_credits(sb, &lfe->id2.i_list, 0) +
|
|
|
+ ocfs2_calc_extend_credits(sb, &gfe->id2.i_list, 0) +
|
|
|
+ 3 + oinfo->dqi_gi.dqi_qtree_depth + 2;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_acquire_dquot(struct dquot *dquot)
|
|
|
+{
|
|
|
+ handle_t *handle;
|
|
|
+ struct ocfs2_mem_dqinfo *oinfo =
|
|
|
+ sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
|
|
|
+ struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
|
|
|
+ int status = 0;
|
|
|
+
|
|
|
+ mlog_entry("id=%u, type=%d", dquot->dq_id, dquot->dq_type);
|
|
|
+ /* We need an exclusive lock, because we're going to update use count
|
|
|
+ * and instantiate possibly new dquot structure */
|
|
|
+ status = ocfs2_lock_global_qf(oinfo, 1);
|
|
|
+ if (status < 0)
|
|
|
+ goto out;
|
|
|
+ handle = ocfs2_start_trans(osb,
|
|
|
+ ocfs2_calc_qinit_credits(dquot->dq_sb, dquot->dq_type));
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ status = PTR_ERR(handle);
|
|
|
+ mlog_errno(status);
|
|
|
+ goto out_ilock;
|
|
|
+ }
|
|
|
+ status = dquot_acquire(dquot);
|
|
|
+ ocfs2_commit_trans(osb, handle);
|
|
|
+out_ilock:
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 1);
|
|
|
+out:
|
|
|
+ mlog_exit(status);
|
|
|
+ return status;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
|
|
|
+{
|
|
|
+ unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) |
|
|
|
+ (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) |
|
|
|
+ (1 << (DQ_LASTSET_B + QIF_INODES_B)) |
|
|
|
+ (1 << (DQ_LASTSET_B + QIF_SPACE_B)) |
|
|
|
+ (1 << (DQ_LASTSET_B + QIF_BTIME_B)) |
|
|
|
+ (1 << (DQ_LASTSET_B + QIF_ITIME_B));
|
|
|
+ int sync = 0;
|
|
|
+ int status;
|
|
|
+ struct super_block *sb = dquot->dq_sb;
|
|
|
+ int type = dquot->dq_type;
|
|
|
+ struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
|
+ handle_t *handle;
|
|
|
+ struct ocfs2_super *osb = OCFS2_SB(sb);
|
|
|
+
|
|
|
+ mlog_entry("id=%u, type=%d", dquot->dq_id, type);
|
|
|
+ dquot_mark_dquot_dirty(dquot);
|
|
|
+
|
|
|
+ /* In case user set some limits, sync dquot immediately to global
|
|
|
+ * quota file so that information propagates quicker */
|
|
|
+ spin_lock(&dq_data_lock);
|
|
|
+ if (dquot->dq_flags & mask)
|
|
|
+ sync = 1;
|
|
|
+ spin_unlock(&dq_data_lock);
|
|
|
+ if (!sync) {
|
|
|
+ status = ocfs2_write_dquot(dquot);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ status = ocfs2_lock_global_qf(oinfo, 1);
|
|
|
+ if (status < 0)
|
|
|
+ goto out;
|
|
|
+ handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS);
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ status = PTR_ERR(handle);
|
|
|
+ mlog_errno(status);
|
|
|
+ goto out_ilock;
|
|
|
+ }
|
|
|
+ status = ocfs2_sync_dquot(dquot);
|
|
|
+ if (status < 0) {
|
|
|
+ mlog_errno(status);
|
|
|
+ goto out_trans;
|
|
|
+ }
|
|
|
+ /* Now write updated local dquot structure */
|
|
|
+ status = dquot_commit(dquot);
|
|
|
+out_trans:
|
|
|
+ ocfs2_commit_trans(osb, handle);
|
|
|
+out_ilock:
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 1);
|
|
|
+out:
|
|
|
+ mlog_exit(status);
|
|
|
+ return status;
|
|
|
+}
|
|
|
+
|
|
|
+/* This should happen only after set_dqinfo(). */
|
|
|
+static int ocfs2_write_info(struct super_block *sb, int type)
|
|
|
+{
|
|
|
+ handle_t *handle;
|
|
|
+ int status = 0;
|
|
|
+ struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
|
|
|
+
|
|
|
+ mlog_entry_void();
|
|
|
+
|
|
|
+ status = ocfs2_lock_global_qf(oinfo, 1);
|
|
|
+ if (status < 0)
|
|
|
+ goto out;
|
|
|
+ handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS);
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ status = PTR_ERR(handle);
|
|
|
+ mlog_errno(status);
|
|
|
+ goto out_ilock;
|
|
|
+ }
|
|
|
+ status = dquot_commit_info(sb, type);
|
|
|
+ ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
|
+out_ilock:
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 1);
|
|
|
+out:
|
|
|
+ mlog_exit(status);
|
|
|
+ return status;
|
|
|
+}
|
|
|
+
|
|
|
+/* This is difficult. We have to lock quota inode and start transaction
|
|
|
+ * in this function but we don't want to take the penalty of exlusive
|
|
|
+ * quota file lock when we are just going to use cached structures. So
|
|
|
+ * we just take read lock check whether we have dquot cached and if so,
|
|
|
+ * we don't have to take the write lock... */
|
|
|
+static int ocfs2_dquot_initialize(struct inode *inode, int type)
|
|
|
+{
|
|
|
+ handle_t *handle = NULL;
|
|
|
+ int status = 0;
|
|
|
+ struct super_block *sb = inode->i_sb;
|
|
|
+ struct ocfs2_mem_dqinfo *oinfo;
|
|
|
+ int exclusive = 0;
|
|
|
+ int cnt;
|
|
|
+ qid_t id;
|
|
|
+
|
|
|
+ mlog_entry_void();
|
|
|
+
|
|
|
+ for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
|
|
|
+ if (type != -1 && cnt != type)
|
|
|
+ continue;
|
|
|
+ if (!sb_has_quota_active(sb, cnt))
|
|
|
+ continue;
|
|
|
+ oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
|
+ status = ocfs2_lock_global_qf(oinfo, 0);
|
|
|
+ if (status < 0)
|
|
|
+ goto out;
|
|
|
+ /* This is just a performance optimization not a reliable test.
|
|
|
+ * Since we hold an inode lock, noone can actually release
|
|
|
+ * the structure until we are finished with initialization. */
|
|
|
+ if (inode->i_dquot[cnt] != NODQUOT) {
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 0);
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+ /* When we have inode lock, we know that no dquot_release() can
|
|
|
+ * run and thus we can safely check whether we need to
|
|
|
+ * read+modify global file to get quota information or whether
|
|
|
+ * our node already has it. */
|
|
|
+ if (cnt == USRQUOTA)
|
|
|
+ id = inode->i_uid;
|
|
|
+ else if (cnt == GRPQUOTA)
|
|
|
+ id = inode->i_gid;
|
|
|
+ else
|
|
|
+ BUG();
|
|
|
+ /* Obtain exclusion from quota off... */
|
|
|
+ down_write(&sb_dqopt(sb)->dqptr_sem);
|
|
|
+ exclusive = !dquot_is_cached(sb, id, cnt);
|
|
|
+ up_write(&sb_dqopt(sb)->dqptr_sem);
|
|
|
+ if (exclusive) {
|
|
|
+ status = ocfs2_lock_global_qf(oinfo, 1);
|
|
|
+ if (status < 0) {
|
|
|
+ exclusive = 0;
|
|
|
+ mlog_errno(status);
|
|
|
+ goto out_ilock;
|
|
|
+ }
|
|
|
+ handle = ocfs2_start_trans(OCFS2_SB(sb),
|
|
|
+ ocfs2_calc_qinit_credits(sb, cnt));
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ status = PTR_ERR(handle);
|
|
|
+ mlog_errno(status);
|
|
|
+ goto out_ilock;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ dquot_initialize(inode, cnt);
|
|
|
+ if (exclusive) {
|
|
|
+ ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 1);
|
|
|
+ }
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 0);
|
|
|
+ }
|
|
|
+ mlog_exit(0);
|
|
|
+ return 0;
|
|
|
+out_ilock:
|
|
|
+ if (exclusive)
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 1);
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 0);
|
|
|
+out:
|
|
|
+ mlog_exit(status);
|
|
|
+ return status;
|
|
|
+}
|
|
|
+
|
|
|
+static int ocfs2_dquot_drop_slow(struct inode *inode)
|
|
|
+{
|
|
|
+ int status;
|
|
|
+ int cnt;
|
|
|
+ int got_lock[MAXQUOTAS] = {0, 0};
|
|
|
+ handle_t *handle;
|
|
|
+ struct super_block *sb = inode->i_sb;
|
|
|
+ struct ocfs2_mem_dqinfo *oinfo;
|
|
|
+
|
|
|
+ for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
|
|
|
+ if (!sb_has_quota_active(sb, cnt))
|
|
|
+ continue;
|
|
|
+ oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
|
+ status = ocfs2_lock_global_qf(oinfo, 1);
|
|
|
+ if (status < 0)
|
|
|
+ goto out;
|
|
|
+ got_lock[cnt] = 1;
|
|
|
+ }
|
|
|
+ handle = ocfs2_start_trans(OCFS2_SB(sb),
|
|
|
+ ocfs2_calc_qinit_credits(sb, USRQUOTA) +
|
|
|
+ ocfs2_calc_qinit_credits(sb, GRPQUOTA));
|
|
|
+ if (IS_ERR(handle)) {
|
|
|
+ status = PTR_ERR(handle);
|
|
|
+ mlog_errno(status);
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+ dquot_drop(inode);
|
|
|
+ ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
|
+out:
|
|
|
+ for (cnt = 0; cnt < MAXQUOTAS; cnt++)
|
|
|
+ if (got_lock[cnt]) {
|
|
|
+ oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 1);
|
|
|
+ }
|
|
|
+ return status;
|
|
|
+}
|
|
|
+
|
|
|
+/* See the comment before ocfs2_dquot_initialize. */
|
|
|
+static int ocfs2_dquot_drop(struct inode *inode)
|
|
|
+{
|
|
|
+ int status = 0;
|
|
|
+ struct super_block *sb = inode->i_sb;
|
|
|
+ struct ocfs2_mem_dqinfo *oinfo;
|
|
|
+ int exclusive = 0;
|
|
|
+ int cnt;
|
|
|
+ int got_lock[MAXQUOTAS] = {0, 0};
|
|
|
+
|
|
|
+ mlog_entry_void();
|
|
|
+ for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
|
|
|
+ if (!sb_has_quota_active(sb, cnt))
|
|
|
+ continue;
|
|
|
+ oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
|
+ status = ocfs2_lock_global_qf(oinfo, 0);
|
|
|
+ if (status < 0)
|
|
|
+ goto out;
|
|
|
+ got_lock[cnt] = 1;
|
|
|
+ }
|
|
|
+ /* Lock against anyone releasing references so that when when we check
|
|
|
+ * we know we are not going to be last ones to release dquot */
|
|
|
+ down_write(&sb_dqopt(sb)->dqptr_sem);
|
|
|
+ /* Urgh, this is a terrible hack :( */
|
|
|
+ for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
|
|
|
+ if (inode->i_dquot[cnt] != NODQUOT &&
|
|
|
+ atomic_read(&inode->i_dquot[cnt]->dq_count) > 1) {
|
|
|
+ exclusive = 1;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (!exclusive)
|
|
|
+ dquot_drop_locked(inode);
|
|
|
+ up_write(&sb_dqopt(sb)->dqptr_sem);
|
|
|
+out:
|
|
|
+ for (cnt = 0; cnt < MAXQUOTAS; cnt++)
|
|
|
+ if (got_lock[cnt]) {
|
|
|
+ oinfo = sb_dqinfo(sb, cnt)->dqi_priv;
|
|
|
+ ocfs2_unlock_global_qf(oinfo, 0);
|
|
|
+ }
|
|
|
+ /* In case we bailed out because we had to do expensive locking
|
|
|
+ * do it now... */
|
|
|
+ if (exclusive)
|
|
|
+ status = ocfs2_dquot_drop_slow(inode);
|
|
|
+ mlog_exit(status);
|
|
|
+ return status;
|
|
|
+}
|
|
|
+
|
|
|
+static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type)
|
|
|
+{
|
|
|
+ struct ocfs2_dquot *dquot =
|
|
|
+ kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS);
|
|
|
+
|
|
|
+ if (!dquot)
|
|
|
+ return NULL;
|
|
|
+ return &dquot->dq_dquot;
|
|
|
+}
|
|
|
+
|
|
|
+static void ocfs2_destroy_dquot(struct dquot *dquot)
|
|
|
+{
|
|
|
+ kmem_cache_free(ocfs2_dquot_cachep, dquot);
|
|
|
+}
|
|
|
+
|
|
|
+struct dquot_operations ocfs2_quota_operations = {
|
|
|
+ .initialize = ocfs2_dquot_initialize,
|
|
|
+ .drop = ocfs2_dquot_drop,
|
|
|
+ .alloc_space = dquot_alloc_space,
|
|
|
+ .alloc_inode = dquot_alloc_inode,
|
|
|
+ .free_space = dquot_free_space,
|
|
|
+ .free_inode = dquot_free_inode,
|
|
|
+ .transfer = dquot_transfer,
|
|
|
+ .write_dquot = ocfs2_write_dquot,
|
|
|
+ .acquire_dquot = ocfs2_acquire_dquot,
|
|
|
+ .release_dquot = ocfs2_release_dquot,
|
|
|
+ .mark_dirty = ocfs2_mark_dquot_dirty,
|
|
|
+ .write_info = ocfs2_write_info,
|
|
|
+ .alloc_dquot = ocfs2_alloc_dquot,
|
|
|
+ .destroy_dquot = ocfs2_destroy_dquot,
|
|
|
+};
|
Jan Kara