From: jxiong <jxiong>
Date: Sat, 29 Dec 2007 08:57:39 +0000 (+0000)
Subject: merge from b1_6
X-Git-Tag: v1_7_110~1^13~3
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=f462ebba449dbe50d6d42784f5fd1931337b6088;p=fs%2Flustre-release.git

merge from b1_6
---

diff --git a/lustre/lvfs/lustre_quota_fmt_convert.c b/lustre/lvfs/lustre_quota_fmt_convert.c
new file mode 100644
index 0000000..70350ed
--- /dev/null
+++ b/lustre/lvfs/lustre_quota_fmt_convert.c
@@ -0,0 +1,185 @@
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * convert quota format.
+ *
+ *  from
+ *  linux/fs/quota_v2.c
+ */
+
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
+
+#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>
+#include <linux/quotaio_v1.h>
+
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+
+#include <lustre_quota.h>
+#include <obd_support.h>
+#include "lustre_quota_fmt.h"
+
+static int admin_convert_dqinfo(struct file *fp_v1, struct file *fp_v2,
+                                struct lustre_quota_info *lqi, int type)
+{
+        struct lustre_mem_dqinfo *info_old, *info_new = &lqi->qi_info[type];
+        int rc;
+
+        OBD_ALLOC_PTR(info_old);
+        if (info_old == NULL)
+                return -ENOMEM;
+
+        rc = lustre_read_quota_file_info(fp_v1, info_old);
+        if (!rc) {
+                /* save essential fields: bgrace, igrace, flags */
+                info_new->dqi_bgrace = info_old->dqi_bgrace;
+                info_new->dqi_igrace = info_old->dqi_igrace;
+                info_new->dqi_flags  = info_old->dqi_flags;
+                rc = lustre_write_quota_info(lqi, type);
+        }
+
+        OBD_FREE_PTR(info_old);
+
+        return rc;
+}
+
+static int admin_convert_v1_to_v2(struct file *fp_v1, struct file *fp_v2,
+                                  struct lustre_quota_info *lqi, int type)
+{
+        struct list_head blk_list;
+        struct dqblk *blk_item, *tmp;
+        dqbuf_t buf = NULL;
+        struct lustre_disk_dqblk *ddquot;
+        struct lustre_dquot *dquot = NULL;
+        int rc;
+
+        ENTRY;
+
+        INIT_LIST_HEAD(&blk_list);
+
+        rc = admin_convert_dqinfo(fp_v1, fp_v2, lqi, type);
+        if (rc) {
+                CERROR("could not copy dqinfo!(%d)\n", rc);
+                GOTO(out_free, rc);
+        }
+
+        rc = walk_tree_dqentry(fp_v1, NULL, type, LUSTRE_DQTREEOFF, 0, &blk_list);
+        if (rc) {
+                CERROR("walk through quota file failed!(%d)\n", rc);
+                GOTO(out_free, rc);
+        }
+        if (list_empty(&blk_list))
+                RETURN(0);
+
+        buf = getdqbuf();
+        if (!buf)
+                GOTO(out_free, rc = -ENOMEM);
+
+        ddquot = (struct lustre_disk_dqblk*)GETENTRIES(buf, LUSTRE_QUOTA_V1);
+
+        OBD_ALLOC_PTR(dquot);
+        if (dquot == NULL)
+                GOTO(out_free, rc = -ENOMEM);
+
+        list_for_each_entry(blk_item, &blk_list, link) {
+                loff_t ret = 0;
+                int i;
+                struct lustre_disk_dqblk fakedquot;
+
+                memset(buf, 0, LUSTRE_DQBLKSIZE);
+                if ((ret = quota_read(fp_v1, NULL, type, blk_item->blk, buf))<0) {
+                        CERROR("VFS: Can't read quota tree block %u.\n",
+                               blk_item->blk);
+                        GOTO(out_free, rc = ret);
+                }
+
+                memset(&fakedquot, 0, sizeof(struct lustre_disk_dqblk));
+                for (i = 0; i < LUSTRE_DQSTRINBLK; i++) {
+                        /* skip empty entry */
+                        if (!memcmp
+                            (&fakedquot, ddquot + i,
+                             sizeof(struct lustre_disk_dqblk)))
+                                continue;
+
+                        memset(dquot, 0, sizeof(*dquot));
+
+                        dquot->dq_id = le32_to_cpu(ddquot[i].dqb_id);
+                        dquot->dq_type = type;
+                        dquot->dq_info = lqi;
+
+                        disk2memdqb(&dquot->dq_dqb, &ddquot[i], LUSTRE_QUOTA_V1);
+                        rc = lustre_commit_dquot(dquot);
+                        if (rc < 0)
+                                GOTO(out_free, rc);
+                }
+        }
+
+        EXIT;
+
+out_free:
+        list_for_each_entry_safe(blk_item, tmp, &blk_list, link) {
+                list_del_init(&blk_item->link);
+                kfree(blk_item);
+        }
+        if (buf)
+                freedqbuf(buf);
+        if (dquot)
+                OBD_FREE_PTR(dquot);
+        return rc;
+}
+
+int lustre_quota_convert(struct lustre_quota_info *lqi, int type)
+{
+        struct file *f_v2 = lqi->qi_files[type];
+        const char *qf_v1[] = LUSTRE_ADMIN_QUOTAFILES_V1;
+        char name[64];
+        struct file *f_v1;
+        int rc = 0;
+        ENTRY;
+
+        LASSERT(f_v2);
+
+        rc = lustre_init_quota_info_generic(lqi, type, 1);
+        if (rc) {
+                CERROR("could not initialize new quota file(%d)\n", rc);
+                RETURN(rc);
+        }
+
+        /* Open old quota file and copy to the new one */
+        sprintf(name, "OBJECTS/%s", qf_v1[type]);
+        f_v1 = filp_open(name, O_RDONLY, 0);
+        if (!IS_ERR(f_v1)) {
+                if (!check_quota_file(f_v1, NULL, type, LUSTRE_QUOTA_V1)) {
+                        rc = admin_convert_v1_to_v2(f_v1, f_v2, lqi, type);
+                        if (rc)
+                                CERROR("failed to convert v1 quota file"
+                                       " to v2 quota file.\n");
+                        else
+                                CDEBUG(D_INFO, "Found v1 quota file, "
+                                               "successfully converted to v2.\n");
+                }
+                else
+                        CERROR("old quota file is broken, "
+                               "new quota file will be empty\n");
+
+                filp_close(f_v1, 0);
+        } else if (PTR_ERR(f_v1) != -ENOENT) /* No quota file is ok */
+                CERROR("old quota file can not be open, "
+                       "new quota file will be empty (%ld)\n", PTR_ERR(f_v1));
+
+        /* mark corresponding quota file as correct */
+        if (!rc)
+                lustre_init_quota_header(lqi, type, 0);
+
+        RETURN(rc);
+}
+
+EXPORT_SYMBOL(lustre_quota_convert);