2008-08-25 17:56:50 +00:00
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/*
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* Implementation of operations over local 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/module.h>
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#define MLOG_MASK_PREFIX ML_QUOTA
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#include <cluster/masklog.h>
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#include "ocfs2_fs.h"
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#include "ocfs2.h"
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#include "inode.h"
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#include "alloc.h"
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#include "file.h"
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#include "buffer_head_io.h"
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#include "journal.h"
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#include "sysfile.h"
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#include "dlmglue.h"
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#include "quota.h"
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/* Number of local quota structures per block */
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static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
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{
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return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
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sizeof(struct ocfs2_local_disk_dqblk));
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}
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/* Number of blocks with entries in one chunk */
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static inline unsigned int ol_chunk_blocks(struct super_block *sb)
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{
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return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
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OCFS2_QBLK_RESERVED_SPACE) << 3) /
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ol_quota_entries_per_block(sb);
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}
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/* Number of entries in a chunk bitmap */
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static unsigned int ol_chunk_entries(struct super_block *sb)
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{
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return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
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}
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/* Offset of the chunk in quota file */
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static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
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{
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/* 1 block for local quota file info, 1 block per chunk for chunk info */
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return 1 + (ol_chunk_blocks(sb) + 1) * c;
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}
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/* Offset of the dquot structure in the quota file */
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static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
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{
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int epb = ol_quota_entries_per_block(sb);
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return ((ol_quota_chunk_block(sb, c) + 1 + off / epb)
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<< sb->s_blocksize_bits) +
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(off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
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}
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/* Compute block number from given offset */
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static inline unsigned int ol_dqblk_file_block(struct super_block *sb, loff_t off)
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{
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return off >> sb->s_blocksize_bits;
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}
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static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
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{
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return off & ((1 << sb->s_blocksize_bits) - 1);
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}
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/* Compute offset in the chunk of a structure with the given offset */
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static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
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{
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int epb = ol_quota_entries_per_block(sb);
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return ((off >> sb->s_blocksize_bits) -
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ol_quota_chunk_block(sb, c) - 1) * epb
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+ ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
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sizeof(struct ocfs2_local_disk_dqblk);
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}
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/* Write bufferhead into the fs */
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static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
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void (*modify)(struct buffer_head *, void *), void *private)
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{
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struct super_block *sb = inode->i_sb;
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handle_t *handle;
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int status;
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handle = ocfs2_start_trans(OCFS2_SB(sb), 1);
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if (IS_ERR(handle)) {
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status = PTR_ERR(handle);
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mlog_errno(status);
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return status;
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}
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status = ocfs2_journal_access(handle, inode, bh,
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OCFS2_JOURNAL_ACCESS_WRITE);
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if (status < 0) {
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mlog_errno(status);
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ocfs2_commit_trans(OCFS2_SB(sb), handle);
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return status;
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}
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lock_buffer(bh);
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modify(bh, private);
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unlock_buffer(bh);
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status = ocfs2_journal_dirty(handle, bh);
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if (status < 0) {
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mlog_errno(status);
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ocfs2_commit_trans(OCFS2_SB(sb), handle);
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return status;
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}
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status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
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if (status < 0) {
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mlog_errno(status);
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return status;
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}
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return 0;
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}
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/* Check whether we understand format of quota files */
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static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
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{
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unsigned int lmagics[MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
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unsigned int lversions[MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
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unsigned int gmagics[MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
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unsigned int gversions[MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
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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 buffer_head *bh;
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struct inode *linode = sb_dqopt(sb)->files[type];
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struct inode *ginode = NULL;
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struct ocfs2_disk_dqheader *dqhead;
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int status, ret = 0;
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/* First check whether we understand local quota file */
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bh = ocfs2_read_quota_block(linode, 0, &status);
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if (!bh) {
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mlog_errno(status);
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mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
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type);
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goto out_err;
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}
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dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
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if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
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mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
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" type=%d\n", le32_to_cpu(dqhead->dqh_magic),
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lmagics[type], type);
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goto out_err;
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}
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if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
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mlog(ML_ERROR, "quota file version does not match (%u != %u),"
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" type=%d\n", le32_to_cpu(dqhead->dqh_version),
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lversions[type], type);
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goto out_err;
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}
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brelse(bh);
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bh = NULL;
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/* Next check whether we understand global quota file */
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ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
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OCFS2_INVALID_SLOT);
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if (!ginode) {
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mlog(ML_ERROR, "cannot get global quota file inode "
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"(type=%d)\n", type);
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goto out_err;
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}
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/* Since the header is read only, we don't care about locking */
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bh = ocfs2_read_quota_block(ginode, 0, &status);
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if (!bh) {
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mlog_errno(status);
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mlog(ML_ERROR, "failed to read global quota file header "
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"(type=%d)\n", type);
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goto out_err;
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}
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dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
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if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
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mlog(ML_ERROR, "global quota file magic does not match "
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"(%u != %u), type=%d\n",
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le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
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goto out_err;
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}
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if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
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mlog(ML_ERROR, "global quota file version does not match "
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"(%u != %u), type=%d\n",
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le32_to_cpu(dqhead->dqh_version), gversions[type],
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type);
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goto out_err;
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}
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ret = 1;
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out_err:
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brelse(bh);
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iput(ginode);
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return ret;
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}
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/* Release given list of quota file chunks */
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static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
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{
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struct ocfs2_quota_chunk *pos, *next;
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list_for_each_entry_safe(pos, next, head, qc_chunk) {
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list_del(&pos->qc_chunk);
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brelse(pos->qc_headerbh);
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kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
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}
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}
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/* Load quota bitmaps into memory */
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static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
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struct ocfs2_local_disk_dqinfo *ldinfo,
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struct list_head *head)
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{
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struct ocfs2_quota_chunk *newchunk;
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int i, status;
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INIT_LIST_HEAD(head);
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for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
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newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
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if (!newchunk) {
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ocfs2_release_local_quota_bitmaps(head);
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return -ENOMEM;
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}
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newchunk->qc_num = i;
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newchunk->qc_headerbh = ocfs2_read_quota_block(inode,
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ol_quota_chunk_block(inode->i_sb, i),
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&status);
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if (!newchunk->qc_headerbh) {
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mlog_errno(status);
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kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
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ocfs2_release_local_quota_bitmaps(head);
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return status;
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}
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list_add_tail(&newchunk->qc_chunk, head);
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}
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return 0;
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}
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static void olq_update_info(struct buffer_head *bh, void *private)
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{
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struct mem_dqinfo *info = private;
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struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
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struct ocfs2_local_disk_dqinfo *ldinfo;
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ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
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OCFS2_LOCAL_INFO_OFF);
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spin_lock(&dq_data_lock);
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ldinfo->dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
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ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
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ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
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spin_unlock(&dq_data_lock);
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}
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/* Read information header from quota file */
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static int ocfs2_local_read_info(struct super_block *sb, int type)
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{
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struct ocfs2_local_disk_dqinfo *ldinfo;
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struct mem_dqinfo *info = sb_dqinfo(sb, type);
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struct ocfs2_mem_dqinfo *oinfo;
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struct inode *lqinode = sb_dqopt(sb)->files[type];
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int status;
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struct buffer_head *bh = NULL;
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int locked = 0;
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info->dqi_maxblimit = 0x7fffffffffffffffLL;
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info->dqi_maxilimit = 0x7fffffffffffffffLL;
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oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
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if (!oinfo) {
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mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
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" info.");
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goto out_err;
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}
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info->dqi_priv = oinfo;
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oinfo->dqi_type = type;
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INIT_LIST_HEAD(&oinfo->dqi_chunk);
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oinfo->dqi_lqi_bh = NULL;
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oinfo->dqi_ibh = NULL;
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status = ocfs2_global_read_info(sb, type);
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if (status < 0)
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goto out_err;
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status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
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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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locked = 1;
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/* Now read local header */
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bh = ocfs2_read_quota_block(lqinode, 0, &status);
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if (!bh) {
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mlog_errno(status);
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mlog(ML_ERROR, "failed to read quota file info header "
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"(type=%d)\n", type);
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goto out_err;
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}
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ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
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OCFS2_LOCAL_INFO_OFF);
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info->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
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oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
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oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
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oinfo->dqi_ibh = bh;
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/* We crashed when using local quota file? */
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if (!(info->dqi_flags & OLQF_CLEAN))
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goto out_err; /* So far we just bail out. Later we should resync here */
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status = ocfs2_load_local_quota_bitmaps(sb_dqopt(sb)->files[type],
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ldinfo,
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&oinfo->dqi_chunk);
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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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/* Now mark quota file as used */
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info->dqi_flags &= ~OLQF_CLEAN;
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status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
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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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return 0;
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out_err:
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if (oinfo) {
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iput(oinfo->dqi_gqinode);
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ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
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ocfs2_lock_res_free(&oinfo->dqi_gqlock);
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brelse(oinfo->dqi_lqi_bh);
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if (locked)
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ocfs2_inode_unlock(lqinode, 1);
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ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
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kfree(oinfo);
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}
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brelse(bh);
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return -1;
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}
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/* Write local info to quota file */
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static int ocfs2_local_write_info(struct super_block *sb, int type)
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{
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|
|
struct mem_dqinfo *info = sb_dqinfo(sb, type);
|
|
|
|
struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
|
|
|
|
->dqi_ibh;
|
|
|
|
int status;
|
|
|
|
|
|
|
|
status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
|
|
|
|
info);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Release info from memory */
|
|
|
|
static int ocfs2_local_free_info(struct super_block *sb, int type)
|
|
|
|
{
|
|
|
|
struct mem_dqinfo *info = sb_dqinfo(sb, type);
|
|
|
|
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
|
|
|
|
struct ocfs2_quota_chunk *chunk;
|
|
|
|
struct ocfs2_local_disk_chunk *dchunk;
|
|
|
|
int mark_clean = 1, len;
|
|
|
|
int status;
|
|
|
|
|
2008-10-20 13:36:47 +00:00
|
|
|
/* At this point we know there are no more dquots and thus
|
|
|
|
* even if there's some sync in the pdflush queue, it won't
|
|
|
|
* find any dquots and return without doing anything */
|
|
|
|
cancel_delayed_work_sync(&oinfo->dqi_sync_work);
|
2008-08-25 17:56:50 +00:00
|
|
|
iput(oinfo->dqi_gqinode);
|
|
|
|
ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
|
|
|
|
ocfs2_lock_res_free(&oinfo->dqi_gqlock);
|
|
|
|
list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
|
|
|
|
dchunk = (struct ocfs2_local_disk_chunk *)
|
|
|
|
(chunk->qc_headerbh->b_data);
|
|
|
|
if (chunk->qc_num < oinfo->dqi_chunks - 1) {
|
|
|
|
len = ol_chunk_entries(sb);
|
|
|
|
} else {
|
|
|
|
len = (oinfo->dqi_blocks -
|
|
|
|
ol_quota_chunk_block(sb, chunk->qc_num) - 1)
|
|
|
|
* ol_quota_entries_per_block(sb);
|
|
|
|
}
|
|
|
|
/* Not all entries free? Bug! */
|
|
|
|
if (le32_to_cpu(dchunk->dqc_free) != len) {
|
|
|
|
mlog(ML_ERROR, "releasing quota file with used "
|
|
|
|
"entries (type=%d)\n", type);
|
|
|
|
mark_clean = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
|
|
|
|
|
|
|
|
if (!mark_clean)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
/* Mark local file as clean */
|
|
|
|
info->dqi_flags |= OLQF_CLEAN;
|
|
|
|
status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
|
|
|
|
oinfo->dqi_ibh,
|
|
|
|
olq_update_info,
|
|
|
|
info);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
|
|
|
|
brelse(oinfo->dqi_ibh);
|
|
|
|
brelse(oinfo->dqi_lqi_bh);
|
|
|
|
kfree(oinfo);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void olq_set_dquot(struct buffer_head *bh, void *private)
|
|
|
|
{
|
|
|
|
struct ocfs2_dquot *od = private;
|
|
|
|
struct ocfs2_local_disk_dqblk *dqblk;
|
|
|
|
struct super_block *sb = od->dq_dquot.dq_sb;
|
|
|
|
|
|
|
|
dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
|
|
|
|
+ ol_dqblk_block_offset(sb, od->dq_local_off));
|
|
|
|
|
|
|
|
dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
|
|
|
|
spin_lock(&dq_data_lock);
|
|
|
|
dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
|
|
|
|
od->dq_origspace);
|
|
|
|
dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
|
|
|
|
od->dq_originodes);
|
|
|
|
spin_unlock(&dq_data_lock);
|
|
|
|
mlog(0, "Writing local dquot %u space %lld inodes %lld\n",
|
|
|
|
od->dq_dquot.dq_id, dqblk->dqb_spacemod, dqblk->dqb_inodemod);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Write dquot to local quota file */
|
|
|
|
static int ocfs2_local_write_dquot(struct dquot *dquot)
|
|
|
|
{
|
|
|
|
struct super_block *sb = dquot->dq_sb;
|
|
|
|
struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
|
|
|
|
struct buffer_head *bh;
|
|
|
|
int status;
|
|
|
|
|
|
|
|
bh = ocfs2_read_quota_block(sb_dqopt(sb)->files[dquot->dq_type],
|
|
|
|
ol_dqblk_file_block(sb, od->dq_local_off),
|
|
|
|
&status);
|
|
|
|
if (!bh) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
status = ocfs2_modify_bh(sb_dqopt(sb)->files[dquot->dq_type], bh,
|
|
|
|
olq_set_dquot, od);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
brelse(bh);
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Find free entry in local quota file */
|
|
|
|
static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
|
|
|
|
int type,
|
|
|
|
int *offset)
|
|
|
|
{
|
|
|
|
struct mem_dqinfo *info = sb_dqinfo(sb, type);
|
|
|
|
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
|
|
|
|
struct ocfs2_quota_chunk *chunk;
|
|
|
|
struct ocfs2_local_disk_chunk *dchunk;
|
|
|
|
int found = 0, len;
|
|
|
|
|
|
|
|
list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
|
|
|
|
dchunk = (struct ocfs2_local_disk_chunk *)
|
|
|
|
chunk->qc_headerbh->b_data;
|
|
|
|
if (le32_to_cpu(dchunk->dqc_free) > 0) {
|
|
|
|
found = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!found)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if (chunk->qc_num < oinfo->dqi_chunks - 1) {
|
|
|
|
len = ol_chunk_entries(sb);
|
|
|
|
} else {
|
|
|
|
len = (oinfo->dqi_blocks -
|
|
|
|
ol_quota_chunk_block(sb, chunk->qc_num) - 1)
|
|
|
|
* ol_quota_entries_per_block(sb);
|
|
|
|
}
|
|
|
|
|
|
|
|
found = ocfs2_find_next_zero_bit(dchunk->dqc_bitmap, len, 0);
|
|
|
|
/* We failed? */
|
|
|
|
if (found == len) {
|
|
|
|
mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
|
|
|
|
" entries free (type=%d)\n", chunk->qc_num,
|
|
|
|
le32_to_cpu(dchunk->dqc_free), type);
|
|
|
|
return ERR_PTR(-EIO);
|
|
|
|
}
|
|
|
|
*offset = found;
|
|
|
|
return chunk;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Add new chunk to the local quota file */
|
|
|
|
static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
|
|
|
|
struct super_block *sb,
|
|
|
|
int type,
|
|
|
|
int *offset)
|
|
|
|
{
|
|
|
|
struct mem_dqinfo *info = sb_dqinfo(sb, type);
|
|
|
|
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
|
|
|
|
struct inode *lqinode = sb_dqopt(sb)->files[type];
|
|
|
|
struct ocfs2_quota_chunk *chunk = NULL;
|
|
|
|
struct ocfs2_local_disk_chunk *dchunk;
|
|
|
|
int status;
|
|
|
|
handle_t *handle;
|
|
|
|
struct buffer_head *bh = NULL;
|
|
|
|
u64 p_blkno;
|
|
|
|
|
|
|
|
/* We are protected by dqio_sem so no locking needed */
|
|
|
|
status = ocfs2_extend_no_holes(lqinode,
|
|
|
|
lqinode->i_size + 2 * sb->s_blocksize,
|
|
|
|
lqinode->i_size);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
|
|
|
|
lqinode->i_size + 2 * sb->s_blocksize);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
|
|
|
|
if (!chunk) {
|
|
|
|
status = -ENOMEM;
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
down_read(&OCFS2_I(lqinode)->ip_alloc_sem);
|
|
|
|
status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
|
|
|
|
&p_blkno, NULL, NULL);
|
|
|
|
up_read(&OCFS2_I(lqinode)->ip_alloc_sem);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
bh = sb_getblk(sb, p_blkno);
|
|
|
|
if (!bh) {
|
|
|
|
status = -ENOMEM;
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
|
|
|
|
|
|
|
|
handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
|
|
|
|
if (IS_ERR(handle)) {
|
|
|
|
status = PTR_ERR(handle);
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
status = ocfs2_journal_access(handle, lqinode, bh,
|
|
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out_trans;
|
|
|
|
}
|
|
|
|
lock_buffer(bh);
|
|
|
|
dchunk->dqc_free = ol_quota_entries_per_block(sb);
|
|
|
|
memset(dchunk->dqc_bitmap, 0,
|
|
|
|
sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
|
|
|
|
OCFS2_QBLK_RESERVED_SPACE);
|
|
|
|
set_buffer_uptodate(bh);
|
|
|
|
unlock_buffer(bh);
|
|
|
|
status = ocfs2_journal_dirty(handle, bh);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out_trans;
|
|
|
|
}
|
|
|
|
|
|
|
|
oinfo->dqi_blocks += 2;
|
|
|
|
oinfo->dqi_chunks++;
|
|
|
|
status = ocfs2_local_write_info(sb, type);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out_trans;
|
|
|
|
}
|
|
|
|
status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
|
|
|
|
chunk->qc_num = list_entry(chunk->qc_chunk.prev,
|
|
|
|
struct ocfs2_quota_chunk,
|
|
|
|
qc_chunk)->qc_num + 1;
|
|
|
|
chunk->qc_headerbh = bh;
|
|
|
|
*offset = 0;
|
|
|
|
return chunk;
|
|
|
|
out_trans:
|
|
|
|
ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
|
|
out:
|
|
|
|
brelse(bh);
|
|
|
|
kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
|
|
|
|
return ERR_PTR(status);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Find free entry in local quota file */
|
|
|
|
static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
|
|
|
|
struct super_block *sb,
|
|
|
|
int type,
|
|
|
|
int *offset)
|
|
|
|
{
|
|
|
|
struct mem_dqinfo *info = sb_dqinfo(sb, type);
|
|
|
|
struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
|
|
|
|
struct ocfs2_quota_chunk *chunk;
|
|
|
|
struct inode *lqinode = sb_dqopt(sb)->files[type];
|
|
|
|
struct ocfs2_local_disk_chunk *dchunk;
|
|
|
|
int epb = ol_quota_entries_per_block(sb);
|
|
|
|
unsigned int chunk_blocks;
|
|
|
|
int status;
|
|
|
|
handle_t *handle;
|
|
|
|
|
|
|
|
if (list_empty(&oinfo->dqi_chunk))
|
|
|
|
return ocfs2_local_quota_add_chunk(sb, type, offset);
|
|
|
|
/* Is the last chunk full? */
|
|
|
|
chunk = list_entry(oinfo->dqi_chunk.prev,
|
|
|
|
struct ocfs2_quota_chunk, qc_chunk);
|
|
|
|
chunk_blocks = oinfo->dqi_blocks -
|
|
|
|
ol_quota_chunk_block(sb, chunk->qc_num) - 1;
|
|
|
|
if (ol_chunk_blocks(sb) == chunk_blocks)
|
|
|
|
return ocfs2_local_quota_add_chunk(sb, type, offset);
|
|
|
|
|
|
|
|
/* We are protected by dqio_sem so no locking needed */
|
|
|
|
status = ocfs2_extend_no_holes(lqinode,
|
|
|
|
lqinode->i_size + sb->s_blocksize,
|
|
|
|
lqinode->i_size);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
|
|
|
|
lqinode->i_size + sb->s_blocksize);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
handle = ocfs2_start_trans(OCFS2_SB(sb), 2);
|
|
|
|
if (IS_ERR(handle)) {
|
|
|
|
status = PTR_ERR(handle);
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
status = ocfs2_journal_access(handle, lqinode, chunk->qc_headerbh,
|
|
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out_trans;
|
|
|
|
}
|
|
|
|
|
|
|
|
dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
|
|
|
|
lock_buffer(chunk->qc_headerbh);
|
|
|
|
le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
|
|
|
|
unlock_buffer(chunk->qc_headerbh);
|
|
|
|
status = ocfs2_journal_dirty(handle, chunk->qc_headerbh);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out_trans;
|
|
|
|
}
|
|
|
|
oinfo->dqi_blocks++;
|
|
|
|
status = ocfs2_local_write_info(sb, type);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out_trans;
|
|
|
|
}
|
|
|
|
|
|
|
|
status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
*offset = chunk_blocks * epb;
|
|
|
|
return chunk;
|
|
|
|
out_trans:
|
|
|
|
ocfs2_commit_trans(OCFS2_SB(sb), handle);
|
|
|
|
out:
|
|
|
|
return ERR_PTR(status);
|
|
|
|
}
|
|
|
|
|
|
|
|
void olq_alloc_dquot(struct buffer_head *bh, void *private)
|
|
|
|
{
|
|
|
|
int *offset = private;
|
|
|
|
struct ocfs2_local_disk_chunk *dchunk;
|
|
|
|
|
|
|
|
dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
|
|
|
|
ocfs2_set_bit(*offset, dchunk->dqc_bitmap);
|
|
|
|
le32_add_cpu(&dchunk->dqc_free, -1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Create dquot in the local file for given id */
|
|
|
|
static int ocfs2_create_local_dquot(struct dquot *dquot)
|
|
|
|
{
|
|
|
|
struct super_block *sb = dquot->dq_sb;
|
|
|
|
int type = dquot->dq_type;
|
|
|
|
struct inode *lqinode = sb_dqopt(sb)->files[type];
|
|
|
|
struct ocfs2_quota_chunk *chunk;
|
|
|
|
struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
|
|
|
|
int offset;
|
|
|
|
int status;
|
|
|
|
|
|
|
|
chunk = ocfs2_find_free_entry(sb, type, &offset);
|
|
|
|
if (!chunk) {
|
|
|
|
chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
|
|
|
|
if (IS_ERR(chunk))
|
|
|
|
return PTR_ERR(chunk);
|
|
|
|
} else if (IS_ERR(chunk)) {
|
|
|
|
return PTR_ERR(chunk);
|
|
|
|
}
|
|
|
|
od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
|
|
|
|
od->dq_chunk = chunk;
|
|
|
|
|
|
|
|
/* Initialize dquot structure on disk */
|
|
|
|
status = ocfs2_local_write_dquot(dquot);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Mark structure as allocated */
|
|
|
|
status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
|
|
|
|
&offset);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
int status;
|
|
|
|
int type = dquot->dq_type;
|
|
|
|
struct ocfs2_dquot *od = OCFS2_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(handle, sb_dqopt(sb)->files[type],
|
|
|
|
od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
|
|
|
|
od->dq_local_off);
|
|
|
|
dchunk = (struct ocfs2_local_disk_chunk *)
|
|
|
|
(od->dq_chunk->qc_headerbh->b_data);
|
|
|
|
/* Mark structure as freed */
|
|
|
|
lock_buffer(od->dq_chunk->qc_headerbh);
|
|
|
|
ocfs2_clear_bit(offset, dchunk->dqc_bitmap);
|
|
|
|
le32_add_cpu(&dchunk->dqc_free, 1);
|
|
|
|
unlock_buffer(od->dq_chunk->qc_headerbh);
|
|
|
|
status = ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
|
|
|
|
if (status < 0) {
|
|
|
|
mlog_errno(status);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
status = 0;
|
|
|
|
out:
|
|
|
|
/* Clear the read bit so that next time someone uses this
|
|
|
|
* dquot he reads fresh info from disk and allocates local
|
|
|
|
* dquot structure */
|
|
|
|
clear_bit(DQ_READ_B, &dquot->dq_flags);
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct quota_format_ops ocfs2_format_ops = {
|
|
|
|
.check_quota_file = ocfs2_local_check_quota_file,
|
|
|
|
.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 = {
|
|
|
|
.qf_fmt_id = QFMT_OCFS2,
|
|
|
|
.qf_ops = &ocfs2_format_ops,
|
|
|
|
.qf_owner = THIS_MODULE
|
|
|
|
};
|