-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/lvfs/lustre_quota_fmt.c
- *
- * Lustre administrative quota format.
- * from linux/fs/quota_v2.c
- */
-
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/mount.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#ifdef HAVE_QUOTAIO_V1_H
-# include <linux/quotaio_v1.h>
-#endif
-
-#include <asm/byteorder.h>
-#include <asm/uaccess.h>
-
-#include <lustre_quota.h>
-#include <obd_support.h>
-#include "lustre_quota_fmt.h"
-
-static const uint lustre_initqversions[][MAXQUOTAS] = {
- [LUSTRE_QUOTA_V2] = LUSTRE_INITQVERSIONS_V2
-};
-
-static const int lustre_dqstrinblk[] = {
- [LUSTRE_QUOTA_V2] = LUSTRE_DQSTRINBLK_V2
-};
-
-static const int lustre_disk_dqblk_sz[] = {
- [LUSTRE_QUOTA_V2] = sizeof(struct lustre_disk_dqblk_v2)
-};
-
-static const union
-{
- struct lustre_disk_dqblk_v2 r1;
-} fakedquot[] = {
- [LUSTRE_QUOTA_V2] = {.r1 = {.dqb_itime = __constant_cpu_to_le64(1LLU)}}
-};
-
-static const union
-{
- struct lustre_disk_dqblk_v2 r1;
-} emptydquot[] = {
- [LUSTRE_QUOTA_V2] = {.r1 = { 0 }}
-};
-
-extern void *lustre_quota_journal_start(struct inode *inode, int delete);
-extern void lustre_quota_journal_stop(void *handle);
-extern ssize_t lustre_read_quota(struct file *f, struct inode *inode, int type,
- char *buf, int count, loff_t pos);
-extern ssize_t lustre_write_quota(struct file *f, char *buf, int count, loff_t pos);
-
-int check_quota_file(struct file *f, struct inode *inode, int type,
- lustre_quota_version_t version)
-{
- struct lustre_disk_dqheader dqhead;
- ssize_t size;
- static const uint quota_magics[] = LUSTRE_INITQMAGICS;
- const uint *quota_versions = lustre_initqversions[version];
-
- size = lustre_read_quota(f, inode, type, (char *)&dqhead,
- sizeof(struct lustre_disk_dqheader), 0);
- if (size != sizeof(struct lustre_disk_dqheader))
- return -EINVAL;
- if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] ||
- le32_to_cpu(dqhead.dqh_version) != quota_versions[type])
- return -EINVAL;
- return 0;
-}
-
-/**
- * Check whether given file is really lustre admin quotafile
- */
-int lustre_check_quota_file(struct lustre_quota_info *lqi, int type)
-{
- struct file *f = lqi->qi_files[type];
- return check_quota_file(f, NULL, type, lqi->qi_version);
-}
-EXPORT_SYMBOL(lustre_check_quota_file);
-
-int lustre_read_quota_file_info(struct file* f, struct lustre_mem_dqinfo* info)
-{
- struct lustre_disk_dqinfo dinfo;
- ssize_t size;
-
- size = lustre_read_quota(f, NULL, 0, (char *)&dinfo,
- sizeof(struct lustre_disk_dqinfo),
- LUSTRE_DQINFOOFF);
-
- if (size != sizeof(struct lustre_disk_dqinfo)) {
- CDEBUG(D_ERROR, "Can't read info structure on device %s.\n",
- f->f_vfsmnt->mnt_sb->s_id);
- return -EINVAL;
- }
- info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
- info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
- info->dqi_flags = le32_to_cpu(dinfo.dqi_flags);
- info->dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
- info->dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
- info->dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
- return 0;
-}
-
-/**
- * Read information header from quota file
- */
-int lustre_read_quota_info(struct lustre_quota_info *lqi, int type)
-{
- return lustre_read_quota_file_info(lqi->qi_files[type],
- &lqi->qi_info[type]);
-}
-EXPORT_SYMBOL(lustre_read_quota_info);
-
-/**
- * Write information header to quota file
- */
-int lustre_write_quota_info(struct lustre_quota_info *lqi, int type)
-{
- struct lustre_disk_dqinfo dinfo;
- struct lustre_mem_dqinfo *info = &lqi->qi_info[type];
- struct file *f = lqi->qi_files[type];
- ssize_t size;
-
- info->dqi_flags &= ~DQF_INFO_DIRTY;
- dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
- dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
- dinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
- dinfo.dqi_blocks = cpu_to_le32(info->dqi_blocks);
- dinfo.dqi_free_blk = cpu_to_le32(info->dqi_free_blk);
- dinfo.dqi_free_entry = cpu_to_le32(info->dqi_free_entry);
-
- size = lustre_write_quota(f, (char *)&dinfo,
- sizeof(struct lustre_disk_dqinfo),
- LUSTRE_DQINFOOFF);
-
- if (size != sizeof(struct lustre_disk_dqinfo)) {
- CDEBUG(D_WARNING,
- "Can't write info structure on device %s.\n",
- f->f_vfsmnt->mnt_sb->s_id);
- return -1;
- }
- return 0;
-}
-EXPORT_SYMBOL(lustre_write_quota_info);
-
-void disk2memdqb(struct lustre_mem_dqblk *m, void *d,
- lustre_quota_version_t version)
-{
- struct lustre_disk_dqblk_v2 *dqblk = (struct lustre_disk_dqblk_v2 *)d;
-
- LASSERT(version == LUSTRE_QUOTA_V2);
-
- m->dqb_ihardlimit = le64_to_cpu(dqblk->dqb_ihardlimit);
- m->dqb_isoftlimit = le64_to_cpu(dqblk->dqb_isoftlimit);
- m->dqb_curinodes = le64_to_cpu(dqblk->dqb_curinodes);
- m->dqb_itime = le64_to_cpu(dqblk->dqb_itime);
- m->dqb_bhardlimit = le64_to_cpu(dqblk->dqb_bhardlimit);
- m->dqb_bsoftlimit = le64_to_cpu(dqblk->dqb_bsoftlimit);
- m->dqb_curspace = le64_to_cpu(dqblk->dqb_curspace);
- m->dqb_btime = le64_to_cpu(dqblk->dqb_btime);
-}
-
-static int mem2diskdqb(void *d, struct lustre_mem_dqblk *m,
- qid_t id, lustre_quota_version_t version)
-{
- struct lustre_disk_dqblk_v2 *dqblk = (struct lustre_disk_dqblk_v2 *)d;
-
- LASSERT(version == LUSTRE_QUOTA_V2);
-
- dqblk->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
- dqblk->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
- dqblk->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
- dqblk->dqb_itime = cpu_to_le64(m->dqb_itime);
- dqblk->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit);
- dqblk->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit);
- dqblk->dqb_curspace = cpu_to_le64(m->dqb_curspace);
- dqblk->dqb_btime = cpu_to_le64(m->dqb_btime);
- dqblk->dqb_id = cpu_to_le32(id);
-
- return 0;
-}
-
-dqbuf_t getdqbuf(void)
-{
- dqbuf_t buf = kmalloc(LUSTRE_DQBLKSIZE, GFP_NOFS);
- if (!buf)
- CDEBUG(D_WARNING,
- "VFS: Not enough memory for quota buffers.\n");
- return buf;
-}
-
-void freedqbuf(dqbuf_t buf)
-{
- kfree(buf);
-}
-
-ssize_t read_blk(struct file *filp, struct inode *inode, int type,
- uint blk, dqbuf_t buf)
-{
- ssize_t ret;
-
- memset(buf, 0, LUSTRE_DQBLKSIZE);
- ret = lustre_read_quota(filp, inode, type, (char *)buf, LUSTRE_DQBLKSIZE,
- blk << LUSTRE_DQBLKSIZE_BITS);
-
- /* Reading past EOF just returns a block of zeros */
- if (ret == -EBADR)
- ret = 0;
-
- return ret;
-}
-
-ssize_t write_blk(struct file *filp, uint blk, dqbuf_t buf)
-{
- ssize_t ret;
-
- ret = lustre_write_quota(filp, (char *)buf, LUSTRE_DQBLKSIZE,
- blk << LUSTRE_DQBLKSIZE_BITS);
-
- return ret;
-}
-
-void lustre_mark_info_dirty(struct lustre_mem_dqinfo *info)
-{
- cfs_set_bit(DQF_INFO_DIRTY_B, &info->dqi_flags);
-}
-
-/**
- * Remove empty block from list and return it
- */
-int get_free_dqblk(struct file *filp, struct lustre_mem_dqinfo *info)
-{
- dqbuf_t buf = getdqbuf();
- struct lustre_disk_dqdbheader *dh =
- (struct lustre_disk_dqdbheader *)buf;
- int ret, blk;
-
- if (!buf)
- return -ENOMEM;
- if (info->dqi_free_blk) {
- blk = info->dqi_free_blk;
- if ((ret = read_blk(filp, NULL, 0, blk, buf)) < 0)
- goto out_buf;
- info->dqi_free_blk = le32_to_cpu(dh->dqdh_next_free);
- } else {
- memset(buf, 0, LUSTRE_DQBLKSIZE);
- /* Assure block allocation... */
- if ((ret = write_blk(filp, info->dqi_blocks, buf)) < 0)
- goto out_buf;
- blk = info->dqi_blocks++;
- }
- lustre_mark_info_dirty(info);
- ret = blk;
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/**
- * Insert empty block to the list
- */
-int put_free_dqblk(struct file *filp, struct lustre_mem_dqinfo *info,
- dqbuf_t buf, uint blk)
-{
- struct lustre_disk_dqdbheader *dh =
- (struct lustre_disk_dqdbheader *)buf;
- int err;
-
- dh->dqdh_next_free = cpu_to_le32(info->dqi_free_blk);
- dh->dqdh_prev_free = cpu_to_le32(0);
- dh->dqdh_entries = cpu_to_le16(0);
- info->dqi_free_blk = blk;
- lustre_mark_info_dirty(info);
- if ((err = write_blk(filp, blk, buf)) < 0)
- /* Some strange block. We had better leave it... */
- return err;
- return 0;
-}
-
-/**
- * Remove given block from the list of blocks with free entries
- */
-int remove_free_dqentry(struct file *filp,
- struct lustre_mem_dqinfo *info, dqbuf_t buf,
- uint blk)
-{
- dqbuf_t tmpbuf = getdqbuf();
- struct lustre_disk_dqdbheader *dh =
- (struct lustre_disk_dqdbheader *)buf;
- uint nextblk = le32_to_cpu(dh->dqdh_next_free), prevblk =
- le32_to_cpu(dh->dqdh_prev_free);
- int err;
-
- if (!tmpbuf)
- return -ENOMEM;
- if (nextblk) {
- if ((err = read_blk(filp, NULL, 0, nextblk, tmpbuf)) < 0)
- goto out_buf;
- ((struct lustre_disk_dqdbheader *)tmpbuf)->dqdh_prev_free =
- dh->dqdh_prev_free;
- if ((err = write_blk(filp, nextblk, tmpbuf)) < 0)
- goto out_buf;
- }
- if (prevblk) {
- if ((err = read_blk(filp, NULL, 0, prevblk, tmpbuf)) < 0)
- goto out_buf;
- ((struct lustre_disk_dqdbheader *)tmpbuf)->dqdh_next_free =
- dh->dqdh_next_free;
- if ((err = write_blk(filp, prevblk, tmpbuf)) < 0)
- goto out_buf;
- } else {
- info->dqi_free_entry = nextblk;
- lustre_mark_info_dirty(info);
- }
- freedqbuf(tmpbuf);
- dh->dqdh_next_free = dh->dqdh_prev_free = cpu_to_le32(0);
- if (write_blk(filp, blk, buf) < 0)
- /* No matter whether write succeeds block is out of list */
- CDEBUG(D_ERROR,
- "VFS: Can't write block (%u) with free entries.\n", blk);
- return 0;
-out_buf:
- freedqbuf(tmpbuf);
- return err;
-}
-
-/**
- * Insert given block to the beginning of list with free entries
- */
-int insert_free_dqentry(struct file *filp,
- struct lustre_mem_dqinfo *info, dqbuf_t buf,
- uint blk)
-{
- dqbuf_t tmpbuf = getdqbuf();
- struct lustre_disk_dqdbheader *dh =
- (struct lustre_disk_dqdbheader *)buf;
- int err;
-
- if (!tmpbuf)
- return -ENOMEM;
- dh->dqdh_next_free = cpu_to_le32(info->dqi_free_entry);
- dh->dqdh_prev_free = cpu_to_le32(0);
- if ((err = write_blk(filp, blk, buf)) < 0)
- goto out_buf;
- if (info->dqi_free_entry) {
- if ((err = read_blk(filp, NULL, 0, info->dqi_free_entry, tmpbuf)) < 0)
- goto out_buf;
- ((struct lustre_disk_dqdbheader *)tmpbuf)->dqdh_prev_free =
- cpu_to_le32(blk);
- if ((err = write_blk(filp, info->dqi_free_entry, tmpbuf)) < 0)
- goto out_buf;
- }
- freedqbuf(tmpbuf);
- info->dqi_free_entry = blk;
- lustre_mark_info_dirty(info);
- return 0;
-out_buf:
- freedqbuf(tmpbuf);
- return err;
-}
-
-
-
-/**
- * Find space for dquot
- */
-static uint find_free_dqentry(struct lustre_dquot *dquot, int *err,
- lustre_quota_version_t version)
-{
- struct lustre_quota_info *lqi = dquot->dq_info;
- struct file *filp = lqi->qi_files[dquot->dq_type];
- struct lustre_mem_dqinfo *info = &lqi->qi_info[dquot->dq_type];
- uint blk, i;
- struct lustre_disk_dqdbheader *dh;
- void *ddquot;
- int dqblk_sz = lustre_disk_dqblk_sz[version];
- int dqstrinblk = lustre_dqstrinblk[version];
- dqbuf_t buf;
-
- *err = 0;
- if (!(buf = getdqbuf())) {
- *err = -ENOMEM;
- return 0;
- }
- dh = (struct lustre_disk_dqdbheader *)buf;
- ddquot = GETENTRIES(buf, version);
- if (info->dqi_free_entry) {
- blk = info->dqi_free_entry;
- if ((*err = read_blk(filp, NULL, 0, blk, buf)) < 0)
- goto out_buf;
- } else {
- blk = get_free_dqblk(filp, info);
- if ((int)blk < 0) {
- *err = blk;
- freedqbuf(buf);
- return 0;
- }
- memset(buf, 0, LUSTRE_DQBLKSIZE);
- info->dqi_free_entry = blk; /* This is enough as block is
- already zeroed and entry list
- is empty... */
- lustre_mark_info_dirty(info);
- }
-
- /* Will block be full */
- if (le16_to_cpu(dh->dqdh_entries) + 1 >= dqstrinblk)
- if ((*err = remove_free_dqentry(filp, info, buf, blk)) < 0) {
- CDEBUG(D_ERROR,
- "VFS: find_free_dqentry(): Can't remove block "
- "(%u) from entry free list.\n", blk);
- goto out_buf;
- }
- dh->dqdh_entries = cpu_to_le16(le16_to_cpu(dh->dqdh_entries) + 1);
- /* Find free structure in block */
- for (i = 0; i < dqstrinblk &&
- memcmp((char *)&emptydquot[version],
- (char *)ddquot + i * dqblk_sz, dqblk_sz);
- i++);
-
- if (i == dqstrinblk) {
- CDEBUG(D_ERROR,
- "VFS: find_free_dqentry(): Data block full but it "
- "shouldn't.\n");
- *err = -EIO;
- goto out_buf;
- }
-
- if ((*err = write_blk(filp, blk, buf)) < 0) {
- CDEBUG(D_ERROR,
- "VFS: find_free_dqentry(): Can't write quota data "
- "block %u.\n", blk);
- goto out_buf;
- }
- dquot->dq_off =
- (blk << LUSTRE_DQBLKSIZE_BITS) +
- sizeof(struct lustre_disk_dqdbheader) +
- i * dqblk_sz;
- freedqbuf(buf);
- return blk;
-out_buf:
- freedqbuf(buf);
- return 0;
-}
-
-/**
- * Insert reference to structure into the trie
- */
-static int do_insert_tree(struct lustre_dquot *dquot, uint * treeblk, int depth,
- lustre_quota_version_t version)
-{
- struct lustre_quota_info *lqi = dquot->dq_info;
- struct file *filp = lqi->qi_files[dquot->dq_type];
- struct lustre_mem_dqinfo *info = &lqi->qi_info[dquot->dq_type];
- dqbuf_t buf;
- int ret = 0, newson = 0, newact = 0;
- u32 *ref;
- uint newblk;
-
- if (!(buf = getdqbuf()))
- return -ENOMEM;
- if (!*treeblk) {
- ret = get_free_dqblk(filp, info);
- if (ret < 0)
- goto out_buf;
- *treeblk = ret;
- memset(buf, 0, LUSTRE_DQBLKSIZE);
- newact = 1;
- } else {
- if ((ret = read_blk(filp, NULL, 0, *treeblk, buf)) < 0) {
- CERROR("VFS: Can't read tree quota block %u.\n",
- *treeblk);
- goto out_buf;
- }
- }
- ref = (u32 *) buf;
- newblk = le32_to_cpu(ref[GETIDINDEX(dquot->dq_id, depth)]);
- if (!newblk)
- newson = 1;
- if (depth == LUSTRE_DQTREEDEPTH - 1) {
-
- if (newblk) {
- CDEBUG(D_ERROR,
- "VFS: Inserting already present quota entry "
- "(block %u).\n",
- ref[GETIDINDEX(dquot->dq_id, depth)]);
- ret = -EIO;
- goto out_buf;
- }
-
- newblk = find_free_dqentry(dquot, &ret, version);
- } else
- ret = do_insert_tree(dquot, &newblk, depth + 1, version);
- if (newson && ret >= 0) {
- ref[GETIDINDEX(dquot->dq_id, depth)] = cpu_to_le32(newblk);
- ret = write_blk(filp, *treeblk, buf);
- } else if (newact && ret < 0)
- put_free_dqblk(filp, info, buf, *treeblk);
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/**
- * Wrapper for inserting quota structure into tree
- */
-static inline int dq_insert_tree(struct lustre_dquot *dquot,
- lustre_quota_version_t version)
-{
- int tmp = LUSTRE_DQTREEOFF;
- return do_insert_tree(dquot, &tmp, 0, version);
-}
-
-/**
- * We don't have to be afraid of deadlocks as we never have quotas on
- * quota files...
- */
-static int lustre_write_dquot(struct lustre_dquot *dquot,
- lustre_quota_version_t version)
-{
- int type = dquot->dq_type;
- struct file *filp;
- loff_t offset;
- ssize_t ret;
- int dqblk_sz = lustre_disk_dqblk_sz[version];
- struct lustre_disk_dqblk_v2 ddquot;
-
- ret = mem2diskdqb(&ddquot, &dquot->dq_dqb, dquot->dq_id, version);
- if (ret < 0)
- return ret;
-
- if (!dquot->dq_off)
- if ((ret = dq_insert_tree(dquot, version)) < 0) {
- CDEBUG(D_ERROR,
- "VFS: Error %Zd occurred while creating "
- "quota.\n", ret);
- return ret;
- }
- filp = dquot->dq_info->qi_files[type];
- offset = dquot->dq_off;
- /* Argh... We may need to write structure full of zeroes but that would
- * be treated as an empty place by the rest of the code. Format change
- * would be definitely cleaner but the problems probably are not worth
- * it */
- if (!memcmp((char *)&emptydquot[version], (char *)&ddquot, dqblk_sz))
- ddquot.dqb_itime = cpu_to_le64(1);
-
- ret = lustre_write_quota(filp, (char *)&ddquot, dqblk_sz, offset);
- if (ret != dqblk_sz) {
- CDEBUG(D_WARNING, "VFS: dquota write failed on dev %s\n",
- filp->f_dentry->d_sb->s_id);
- if (ret >= 0)
- ret = -ENOSPC;
- } else
- ret = 0;
-
- return ret;
-}
-
-/**
- * Free dquot entry in data block
- */
-static int free_dqentry(struct lustre_dquot *dquot, uint blk,
- lustre_quota_version_t version)
-{
- struct file *filp = dquot->dq_info->qi_files[dquot->dq_type];
- struct lustre_mem_dqinfo *info =
- &dquot->dq_info->qi_info[dquot->dq_type];
- struct lustre_disk_dqdbheader *dh;
- dqbuf_t buf = getdqbuf();
- int dqstrinblk = lustre_dqstrinblk[version];
- int ret = 0;
-
- if (!buf)
- return -ENOMEM;
- if (dquot->dq_off >> LUSTRE_DQBLKSIZE_BITS != blk) {
- CDEBUG(D_ERROR,
- "VFS: Quota structure has offset to other block (%u) "
- "than it should (%u).\n",
- blk, (uint) (dquot->dq_off >> LUSTRE_DQBLKSIZE_BITS));
- goto out_buf;
- }
- if ((ret = read_blk(filp, NULL, 0, blk, buf)) < 0) {
- CDEBUG(D_ERROR, "VFS: Can't read quota data block %u\n", blk);
- goto out_buf;
- }
- dh = (struct lustre_disk_dqdbheader *)buf;
- dh->dqdh_entries = cpu_to_le16(le16_to_cpu(dh->dqdh_entries) - 1);
- if (!le16_to_cpu(dh->dqdh_entries)) { /* Block got free? */
- if ((ret = remove_free_dqentry(filp, info, buf, blk)) < 0 ||
- (ret = put_free_dqblk(filp, info, buf, blk)) < 0) {
- CDEBUG(D_ERROR,
- "VFS: Can't move quota data block (%u) to free "
- "list.\n", blk);
- goto out_buf;
- }
- } else {
- memset(buf + (dquot->dq_off & ((1<<LUSTRE_DQBLKSIZE_BITS) - 1)),
- 0, lustre_disk_dqblk_sz[version]);
- if (le16_to_cpu(dh->dqdh_entries) == dqstrinblk - 1) {
- /* Insert will write block itself */
- if ((ret =
- insert_free_dqentry(filp, info, buf, blk)) < 0) {
- CDEBUG(D_ERROR,
- "VFS: Can't insert quota data block "
- "(%u) to free entry list.\n", blk);
- goto out_buf;
- }
- } else if ((ret = write_blk(filp, blk, buf)) < 0) {
- CDEBUG(D_ERROR,
- "VFS: Can't write quota data block %u\n", blk);
- goto out_buf;
- }
- }
- dquot->dq_off = 0; /* Quota is now unattached */
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/**
- * Remove reference to dquot from tree
- */
-static int remove_tree(struct lustre_dquot *dquot, uint * blk, int depth,
- lustre_quota_version_t version)
-{
- struct file *filp = dquot->dq_info->qi_files[dquot->dq_type];
- struct lustre_mem_dqinfo *info =
- &dquot->dq_info->qi_info[dquot->dq_type];
- dqbuf_t buf = getdqbuf();
- int ret = 0;
- uint newblk;
- u32 *ref = (u32 *) buf;
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(filp, NULL, 0, *blk, buf)) < 0) {
- CERROR("VFS: Can't read quota data block %u\n", *blk);
- goto out_buf;
- }
- newblk = le32_to_cpu(ref[GETIDINDEX(dquot->dq_id, depth)]);
- if (depth == LUSTRE_DQTREEDEPTH - 1) {
- ret = free_dqentry(dquot, newblk, version);
- newblk = 0;
- } else
- ret = remove_tree(dquot, &newblk, depth + 1, version);
- if (ret >= 0 && !newblk) {
- int i;
- ref[GETIDINDEX(dquot->dq_id, depth)] = cpu_to_le32(0);
- for (i = 0; i < LUSTRE_DQBLKSIZE && !buf[i]; i++)
- /* Block got empty? */ ;
- /* don't put the root block into free blk list! */
- if (i == LUSTRE_DQBLKSIZE && *blk != LUSTRE_DQTREEOFF) {
- put_free_dqblk(filp, info, buf, *blk);
- *blk = 0;
- } else if ((ret = write_blk(filp, *blk, buf)) < 0)
- CDEBUG(D_ERROR,
- "VFS: Can't write quota tree block %u.\n", *blk);
- }
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/**
- * Delete dquot from tree
- */
-static int lustre_delete_dquot(struct lustre_dquot *dquot,
- lustre_quota_version_t version)
-{
- uint tmp = LUSTRE_DQTREEOFF;
-
- if (!dquot->dq_off) /* Even not allocated? */
- return 0;
- return remove_tree(dquot, &tmp, 0, version);
-}
-
-/**
- * Find entry in block
- */
-static loff_t find_block_dqentry(struct lustre_dquot *dquot, uint blk,
- lustre_quota_version_t version)
-{
- struct file *filp = dquot->dq_info->qi_files[dquot->dq_type];
- dqbuf_t buf = getdqbuf();
- loff_t ret = 0;
- int i;
- struct lustre_disk_dqblk_v2 *ddquot =
- (struct lustre_disk_dqblk_v2 *)GETENTRIES(buf, version);
- int dqblk_sz = lustre_disk_dqblk_sz[version];
- int dqstrinblk = lustre_dqstrinblk[version];
-
- LASSERT(version == LUSTRE_QUOTA_V2);
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(filp, NULL, 0, blk, buf)) < 0) {
- CERROR("VFS: Can't read quota tree block %u.\n", blk);
- goto out_buf;
- }
- if (dquot->dq_id)
- for (i = 0; i < dqstrinblk &&
- le32_to_cpu(ddquot[i].dqb_id) != dquot->dq_id;
- i++) ;
- else { /* ID 0 as a bit more complicated searching... */
- for (i = 0; i < dqstrinblk; i++)
- if (!le32_to_cpu(ddquot[i].dqb_id)
- && memcmp((char *)&emptydquot[version],
- (char *)&ddquot[i], dqblk_sz))
- break;
- }
- if (i == dqstrinblk) {
- CDEBUG(D_ERROR,
- "VFS: Quota for id %u referenced but not present.\n",
- dquot->dq_id);
- ret = -EIO;
- goto out_buf;
- } else
- ret =
- (blk << LUSTRE_DQBLKSIZE_BITS) +
- sizeof(struct lustre_disk_dqdbheader) +
- i * dqblk_sz;
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/**
- * Find entry for given id in the tree
- */
-static loff_t find_tree_dqentry(struct lustre_dquot *dquot, uint blk, int depth,
- lustre_quota_version_t version)
-{
- struct file *filp = dquot->dq_info->qi_files[dquot->dq_type];
- dqbuf_t buf = getdqbuf();
- loff_t ret = 0;
- u32 *ref = (u32 *) buf;
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(filp, NULL, 0, blk, buf)) < 0) {
- CERROR("VFS: Can't read quota tree block %u.\n", blk);
- goto out_buf;
- }
- ret = 0;
- blk = le32_to_cpu(ref[GETIDINDEX(dquot->dq_id, depth)]);
- if (!blk) /* No reference? */
- goto out_buf;
- if (depth < LUSTRE_DQTREEDEPTH - 1)
- ret = find_tree_dqentry(dquot, blk, depth + 1, version);
- else
- ret = find_block_dqentry(dquot, blk, version);
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/**
- * Find entry for given id in the tree - wrapper function
- */
-static inline loff_t find_dqentry(struct lustre_dquot *dquot,
- lustre_quota_version_t version)
-{
- return find_tree_dqentry(dquot, LUSTRE_DQTREEOFF, 0, version);
-}
-
-int lustre_read_dquot(struct lustre_dquot *dquot)
-{
- int type = dquot->dq_type;
- struct file *filp;
- loff_t offset;
- int ret = 0, dqblk_sz;
- lustre_quota_version_t version;
-
- /* Invalidated quota? */
- if (!dquot->dq_info || !(filp = dquot->dq_info->qi_files[type])) {
- CDEBUG(D_ERROR, "VFS: Quota invalidated while reading!\n");
- return -ESRCH;
- }
-
- version = dquot->dq_info->qi_version;
- LASSERT(version == LUSTRE_QUOTA_V2);
- dqblk_sz = lustre_disk_dqblk_sz[version];
-
- offset = find_dqentry(dquot, version);
- if (offset <= 0) { /* Entry not present? */
- if (offset < 0)
- CDEBUG(D_ERROR,
- "VFS: Can't read quota structure for id %u.\n",
- dquot->dq_id);
- dquot->dq_off = 0;
- cfs_set_bit(DQ_FAKE_B, &dquot->dq_flags);
- memset(&dquot->dq_dqb, 0, sizeof(struct lustre_mem_dqblk));
- ret = offset;
- } else {
- struct lustre_disk_dqblk_v2 ddquot;
-
- dquot->dq_off = offset;
- if ((ret = lustre_read_quota(filp, NULL, type, (char *)&ddquot,
- dqblk_sz, offset)) != dqblk_sz) {
- if (ret >= 0)
- ret = -EIO;
- CDEBUG(D_ERROR,
- "VFS: Error while reading quota structure for id "
- "%u.\n", dquot->dq_id);
- memset((char *)&ddquot, 0, dqblk_sz);
- } else {
- ret = 0;
- /* We need to escape back all-zero structure */
- if (!memcmp((char *)&fakedquot[version],
- (char *)&ddquot, dqblk_sz))
- ddquot.dqb_itime = cpu_to_le64(0);
- }
- disk2memdqb(&dquot->dq_dqb, &ddquot, version);
- }
-
- return ret;
-}
-EXPORT_SYMBOL(lustre_read_dquot);
-
-/**
- * Commit changes of dquot to disk - it might also mean deleting
- * it when quota became fake.
- */
-int lustre_commit_dquot(struct lustre_dquot *dquot)
-{
- int rc = 0;
- lustre_quota_version_t version = dquot->dq_info->qi_version;
- void *handle;
- struct inode *inode = dquot->dq_info->qi_files[dquot->dq_type]->f_dentry->d_inode;
- int delete = 0;
-
- /* always clear the flag so we don't loop on an IO error... */
- cfs_clear_bit(DQ_MOD_B, &dquot->dq_flags);
-
- /* The block/inode usage in admin quotafile isn't the real usage
- * over all cluster, so keep the fake dquot entry on disk is
- * meaningless, just remove it */
- if (cfs_test_bit(DQ_FAKE_B, &dquot->dq_flags))
- delete = 1;
- handle = lustre_quota_journal_start(inode, delete);
- if (unlikely(IS_ERR(handle))) {
- rc = PTR_ERR(handle);
- CERROR("fail to lustre_quota_journal_start: rc = %d\n", rc);
- return rc;
- }
-
- if (delete)
- rc = lustre_delete_dquot(dquot, version);
- else
- rc = lustre_write_dquot(dquot, version);
- lustre_quota_journal_stop(handle);
-
- if (rc < 0)
- return rc;
-
- if (lustre_info_dirty(&dquot->dq_info->qi_info[dquot->dq_type]))
- rc = lustre_write_quota_info(dquot->dq_info, dquot->dq_type);
-
- return rc;
-}
-EXPORT_SYMBOL(lustre_commit_dquot);
-
-int lustre_init_quota_header(struct lustre_quota_info *lqi, int type,
- int fakemagics)
-{
- static const uint quota_magics[] = LUSTRE_INITQMAGICS;
- static const uint fake_magics[] = LUSTRE_BADQMAGICS;
- const uint* quota_versions = lustre_initqversions[lqi->qi_version];
- struct lustre_disk_dqheader dqhead;
- ssize_t size;
- struct file *fp = lqi->qi_files[type];
- int rc = 0;
-
- /* write quotafile header */
- dqhead.dqh_magic = cpu_to_le32(fakemagics ?
- fake_magics[type] : quota_magics[type]);
- dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
- size = lustre_write_quota(fp, (char *)&dqhead,
- sizeof(struct lustre_disk_dqheader), 0);
-
- if (size != sizeof(struct lustre_disk_dqheader)) {
- CDEBUG(D_ERROR, "error writing quoafile header (rc:%d)\n", rc);
- rc = size;
- }
-
- return rc;
-}
-
-/**
- * We need to export this function to initialize quotafile, because we haven't
- * user level check utility
- */
-int lustre_init_quota_info_generic(struct lustre_quota_info *lqi, int type,
- int fakemagics)
-{
- struct lustre_mem_dqinfo *dqinfo = &lqi->qi_info[type];
- int rc;
-
- rc = lustre_init_quota_header(lqi, type, fakemagics);
- if (rc)
- return rc;
-
- /* write init quota info */
- memset(dqinfo, 0, sizeof(*dqinfo));
- dqinfo->dqi_bgrace = MAX_DQ_TIME;
- dqinfo->dqi_igrace = MAX_IQ_TIME;
- dqinfo->dqi_blocks = LUSTRE_DQTREEOFF + 1;
-
- return lustre_write_quota_info(lqi, type);
-}
-
-int lustre_init_quota_info(struct lustre_quota_info *lqi, int type)
-{
- return lustre_init_quota_info_generic(lqi, type, 0);
-}
-EXPORT_SYMBOL(lustre_init_quota_info);
-
-static int walk_block_dqentry(struct file *filp, struct inode *inode, int type,
- uint blk, cfs_list_t *list)
-{
- dqbuf_t buf = getdqbuf();
- loff_t ret = 0;
- struct lustre_disk_dqdbheader *dqhead =
- (struct lustre_disk_dqdbheader *)buf;
- struct dqblk *blk_item;
- struct dqblk *pos;
- cfs_list_t *tmp;
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(filp, inode, type, blk, buf)) < 0) {
- CERROR("VFS: Can't read quota tree block %u.\n", blk);
- goto out_buf;
- }
- ret = 0;
-
- if (!le32_to_cpu(dqhead->dqdh_entries))
- goto out_buf;
-
- if (cfs_list_empty(list)) {
- tmp = list;
- goto done;
- }
-
- cfs_list_for_each_entry(pos, list, link) {
- if (blk == pos->blk) /* we got this blk already */
- goto out_buf;
- if (blk > pos->blk)
- continue;
- break;
- }
- tmp = &pos->link;
-done:
- blk_item = kmalloc(sizeof(*blk_item), GFP_NOFS);
- if (!blk_item) {
- ret = -ENOMEM;
- goto out_buf;
- }
- blk_item->blk = blk;
- CFS_INIT_LIST_HEAD(&blk_item->link);
-
- cfs_list_add_tail(&blk_item->link, tmp);
-
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-int walk_tree_dqentry(struct file *filp, struct inode *inode, int type,
- uint blk, int depth, cfs_list_t *list)
-{
- dqbuf_t buf = getdqbuf();
- loff_t ret = 0;
- int index;
- u32 *ref = (u32 *) buf;
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(filp, inode, type, blk, buf)) < 0) {
- CERROR("VFS: Can't read quota tree block %u.\n", blk);
- goto out_buf;
- }
- ret = 0;
-
- for (index = 0; index <= 0xff && !ret; index++) {
- blk = le32_to_cpu(ref[index]);
- if (!blk) /* No reference */
- continue;
-
- if (depth < LUSTRE_DQTREEDEPTH - 1)
- ret = walk_tree_dqentry(filp, inode, type, blk,
- depth + 1, list);
- else
- ret = walk_block_dqentry(filp, inode, type, blk, list);
- }
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/**
- * Walk through the quota file (v2 format) to get all ids with quota limit
- */
-int lustre_get_qids(struct file *fp, struct inode *inode, int type,
- cfs_list_t *list)
-{
- cfs_list_t blk_list;
- struct dqblk *blk_item, *tmp;
- dqbuf_t buf = NULL;
- struct lustre_disk_dqblk_v2 *ddquot;
- int rc;
- lustre_quota_version_t version;
-
- ENTRY;
-
- LASSERT(ergo(fp == NULL, inode != NULL));
-
- if (check_quota_file(fp, inode, type, LUSTRE_QUOTA_V2) == 0)
- version = LUSTRE_QUOTA_V2;
- else {
- CDEBUG(D_ERROR, "unknown quota file format!\n");
- RETURN(-EINVAL);
- }
-
- if (!cfs_list_empty(list)) {
- CDEBUG(D_ERROR, "not empty list\n");
- RETURN(-EINVAL);
- }
-
- CFS_INIT_LIST_HEAD(&blk_list);
- rc = walk_tree_dqentry(fp, inode, type, LUSTRE_DQTREEOFF, 0, &blk_list);
- if (rc) {
- CDEBUG(D_ERROR, "walk through quota file failed!(%d)\n", rc);
- GOTO(out_free, rc);
- }
- if (cfs_list_empty(&blk_list))
- RETURN(0);
-
- buf = getdqbuf();
- if (!buf)
- RETURN(-ENOMEM);
- ddquot = (struct lustre_disk_dqblk_v2 *)GETENTRIES(buf, version);
-
- cfs_list_for_each_entry(blk_item, &blk_list, link) {
- loff_t ret = 0;
- int i, dqblk_sz = lustre_disk_dqblk_sz[version];
-
- memset(buf, 0, LUSTRE_DQBLKSIZE);
- if ((ret = read_blk(fp, inode, type, blk_item->blk, buf)) < 0) {
- CERROR("VFS: Can't read quota tree block %u.\n",
- blk_item->blk);
- GOTO(out_free, rc = ret);
- }
-
- for (i = 0; i < lustre_dqstrinblk[version]; i++) {
- struct dquot_id *dqid;
- /* skip empty entry */
- if (!memcmp((char *)&emptydquot[version],
- (char *)&ddquot[i], dqblk_sz))
- continue;
-
- OBD_ALLOC_GFP(dqid, sizeof(*dqid), CFS_ALLOC_NOFS);
- if (!dqid)
- GOTO(out_free, rc = -ENOMEM);
-
- dqid->di_id = le32_to_cpu(ddquot[i].dqb_id);
- dqid->di_flag = le64_to_cpu(ddquot[i].dqb_ihardlimit) ?
- QI_SET : 0;
- dqid->di_flag |= le64_to_cpu(ddquot[i].dqb_bhardlimit) ?
- QB_SET : 0;
-
- CFS_INIT_LIST_HEAD(&dqid->di_link);
- cfs_list_add(&dqid->di_link, list);
- }
- }
-
-out_free:
- cfs_list_for_each_entry_safe(blk_item, tmp, &blk_list, link) {
- cfs_list_del_init(&blk_item->link);
- kfree(blk_item);
- }
- if (buf)
- freedqbuf(buf);
-
- RETURN(rc);
-}
-EXPORT_SYMBOL(lustre_get_qids);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff