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LU-3963 obdclass: convert to linux list api
[fs/lustre-release.git] / lustre / obdclass / dt_object.c
index 13962cd..088c1cb 100644 (file)
@@ -27,7 +27,7 @@
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2012, Intel Corporation.
+ * Copyright (c) 2011, 2013, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -67,13 +67,13 @@ EXPORT_SYMBOL(dt_key);
  */
 void dt_txn_callback_add(struct dt_device *dev, struct dt_txn_callback *cb)
 {
-        cfs_list_add(&cb->dtc_linkage, &dev->dd_txn_callbacks);
+       list_add(&cb->dtc_linkage, &dev->dd_txn_callbacks);
 }
 EXPORT_SYMBOL(dt_txn_callback_add);
 
 void dt_txn_callback_del(struct dt_device *dev, struct dt_txn_callback *cb)
 {
-        cfs_list_del_init(&cb->dtc_linkage);
+       list_del_init(&cb->dtc_linkage);
 }
 EXPORT_SYMBOL(dt_txn_callback_del);
 
@@ -86,7 +86,7 @@ int dt_txn_hook_start(const struct lu_env *env,
         if (th->th_local)
                 return 0;
 
-        cfs_list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
+       list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
                 if (cb->dtc_txn_start == NULL ||
                     !(cb->dtc_tag & env->le_ctx.lc_tags))
                         continue;
@@ -107,7 +107,7 @@ int dt_txn_hook_stop(const struct lu_env *env, struct thandle *txn)
         if (txn->th_local)
                 return 0;
 
-        cfs_list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
+       list_for_each_entry(cb, &dev->dd_txn_callbacks, dtc_linkage) {
                 if (cb->dtc_txn_stop == NULL ||
                     !(cb->dtc_tag & env->le_ctx.lc_tags))
                         continue;
@@ -121,24 +121,23 @@ EXPORT_SYMBOL(dt_txn_hook_stop);
 
 void dt_txn_hook_commit(struct thandle *txn)
 {
-        struct dt_txn_callback *cb;
+       struct dt_txn_callback *cb;
 
-        if (txn->th_local)
-                return;
+       if (txn->th_local)
+               return;
 
-        cfs_list_for_each_entry(cb, &txn->th_dev->dd_txn_callbacks,
-                                dtc_linkage) {
-                if (cb->dtc_txn_commit)
-                        cb->dtc_txn_commit(txn, cb->dtc_cookie);
-        }
+       list_for_each_entry(cb, &txn->th_dev->dd_txn_callbacks,
+                           dtc_linkage) {
+               if (cb->dtc_txn_commit)
+                       cb->dtc_txn_commit(txn, cb->dtc_cookie);
+       }
 }
 EXPORT_SYMBOL(dt_txn_hook_commit);
 
 int dt_device_init(struct dt_device *dev, struct lu_device_type *t)
 {
-
-        CFS_INIT_LIST_HEAD(&dev->dd_txn_callbacks);
-        return lu_device_init(&dev->dd_lu_dev, t);
+       INIT_LIST_HEAD(&dev->dd_txn_callbacks);
+       return lu_device_init(&dev->dd_lu_dev, t);
 }
 EXPORT_SYMBOL(dt_device_init);
 
@@ -215,22 +214,25 @@ EXPORT_SYMBOL(dt_lookup_dir);
 /* this differs from dt_locate by top_dev as parameter
  * but not one from lu_site */
 struct dt_object *dt_locate_at(const struct lu_env *env,
-                              struct dt_device *dev, const struct lu_fid *fid,
-                              struct lu_device *top_dev)
+                              struct dt_device *dev,
+                              const struct lu_fid *fid,
+                              struct lu_device *top_dev,
+                              const struct lu_object_conf *conf)
 {
-       struct lu_object *lo, *n;
-       ENTRY;
+       struct lu_object *lo;
+       struct lu_object *n;
 
-       lo = lu_object_find_at(env, top_dev, fid, NULL);
+       lo = lu_object_find_at(env, top_dev, fid, conf);
        if (IS_ERR(lo))
-               return (void *)lo;
+               return ERR_PTR(PTR_ERR(lo));
 
        LASSERT(lo != NULL);
 
-       cfs_list_for_each_entry(n, &lo->lo_header->loh_layers, lo_linkage) {
+       list_for_each_entry(n, &lo->lo_header->loh_layers, lo_linkage) {
                if (n->lo_dev == &dev->dd_lu_dev)
                        return container_of0(n, struct dt_object, do_lu);
        }
+
        return ERR_PTR(-ENOENT);
 }
 EXPORT_SYMBOL(dt_locate_at);
@@ -293,22 +295,21 @@ dt_store_resolve(const struct lu_env *env, struct dt_device *dt,
        struct dt_thread_info *info = dt_info(env);
        struct dt_find_hint   *dfh = &info->dti_dfh;
        struct dt_object      *obj;
-       char                  *local = info->dti_buf;
        int                    result;
 
 
         dfh->dfh_dt = dt;
         dfh->dfh_fid = fid;
 
-        strncpy(local, path, DT_MAX_PATH);
-        local[DT_MAX_PATH - 1] = '\0';
+       strlcpy(info->dti_buf, path, sizeof(info->dti_buf));
 
         result = dt->dd_ops->dt_root_get(env, dt, fid);
         if (result == 0) {
                 obj = dt_locate(env, dt, fid);
                 if (!IS_ERR(obj)) {
                         dfh->dfh_o = obj;
-                        result = dt_path_parser(env, local, dt_find_entry, dfh);
+                       result = dt_path_parser(env, info->dti_buf,
+                                               dt_find_entry, dfh);
                         if (result != 0)
                                 obj = ERR_PTR(result);
                         else
@@ -564,6 +565,17 @@ EXPORT_SYMBOL(dt_directory_features);
 const struct dt_index_features dt_otable_features;
 EXPORT_SYMBOL(dt_otable_features);
 
+/* lfsck orphan */
+const struct dt_index_features dt_lfsck_orphan_features = {
+       .dif_flags              = 0,
+       .dif_keysize_min        = sizeof(struct lu_fid),
+       .dif_keysize_max        = sizeof(struct lu_fid),
+       .dif_recsize_min        = sizeof(struct lu_orphan_rec),
+       .dif_recsize_max        = sizeof(struct lu_orphan_rec),
+       .dif_ptrsize            = 4
+};
+EXPORT_SYMBOL(dt_lfsck_orphan_features);
+
 /* lfsck */
 const struct dt_index_features dt_lfsck_features = {
        .dif_flags              = DT_IND_UPDATE,
@@ -627,6 +639,8 @@ static inline const struct dt_index_features *dt_index_feat_select(__u64 seq,
                        /* slave index should be a regular file */
                        return ERR_PTR(-ENOENT);
                return &dt_quota_slv_features;
+       } else if (seq == FID_SEQ_LAYOUT_RBTREE){
+               return &dt_lfsck_orphan_features;
        } else if (seq >= FID_SEQ_NORMAL) {
                /* object is part of the namespace, verify that it is a
                 * directory */
@@ -661,10 +675,6 @@ static int dt_index_page_build(const struct lu_env *env, union lu_page *lp,
        int                      rc, size;
        ENTRY;
 
-       /* no support for variable key & record size for now */
-       LASSERT((ii->ii_flags & II_FL_VARKEY) == 0);
-       LASSERT((ii->ii_flags & II_FL_VARREC) == 0);
-
        /* initialize the header of the new container */
        memset(lip, 0, LIP_HDR_SIZE);
        lip->lip_magic = LIP_MAGIC;
@@ -680,7 +690,9 @@ static int dt_index_page_build(const struct lu_env *env, union lu_page *lp,
        do {
                char            *tmp_entry = entry;
                struct dt_key   *key;
-               __u64            hash;
+               __u64           hash;
+               __u16           keysize;
+               __u16           recsize;
 
                /* fetch 64-bit hash value */
                hash = iops->store(env, it);
@@ -697,18 +709,24 @@ static int dt_index_page_build(const struct lu_env *env, union lu_page *lp,
                        GOTO(out, rc = 0);
                }
 
-               if ((ii->ii_flags & II_FL_NOHASH) == 0) {
+               if (!(ii->ii_flags & II_FL_NOHASH)) {
                        /* client wants to the 64-bit hash value associated with
                         * each record */
                        memcpy(tmp_entry, &hash, sizeof(hash));
                        tmp_entry += sizeof(hash);
                }
 
-               /* then the key value */
-               LASSERT(iops->key_size(env, it) == ii->ii_keysize);
-               key = iops->key(env, it);
-               memcpy(tmp_entry, key, ii->ii_keysize);
-               tmp_entry += ii->ii_keysize;
+               if (ii->ii_flags & II_FL_VARKEY)
+                       keysize = iops->key_size(env, it);
+               else
+                       keysize = ii->ii_keysize;
+
+               if (!(ii->ii_flags & II_FL_NOKEY)) {
+                       /* then the key value */
+                       key = iops->key(env, it);
+                       memcpy(tmp_entry, key, keysize);
+                       tmp_entry += keysize;
+               }
 
                /* and finally the record */
                rc = iops->rec(env, it, (struct dt_rec *)tmp_entry, attr);
@@ -720,7 +738,13 @@ static int dt_index_page_build(const struct lu_env *env, union lu_page *lp,
                        lip->lip_nr++;
                        if (unlikely(lip->lip_nr == 1 && ii->ii_count == 0))
                                ii->ii_hash_start = hash;
-                       entry = tmp_entry + ii->ii_recsize;
+
+                       if (ii->ii_flags & II_FL_VARREC)
+                               recsize = iops->rec_size(env, it, attr);
+                       else
+                               recsize = ii->ii_recsize;
+
+                       entry = tmp_entry + recsize;
                        nob -= size;
                }
 
@@ -742,6 +766,7 @@ out:
        return rc;
 }
 
+
 /*
  * Walk index and fill lu_page containers with key/record pairs
  *
@@ -794,6 +819,10 @@ int dt_index_walk(const struct lu_env *env, struct dt_object *obj,
                rc = iops->next(env, it);
        } else if (rc > 0) {
                rc = 0;
+       } else {
+               if (rc == -ENODATA)
+                       rc = 0;
+               GOTO(out, rc);
        }
 
        /* Fill containers one after the other. There might be multiple
@@ -808,7 +837,7 @@ int dt_index_walk(const struct lu_env *env, struct dt_object *obj,
                int              i;
 
                LASSERT(pageidx < rdpg->rp_npages);
-               lp = cfs_kmap(rdpg->rp_pages[pageidx]);
+               lp = kmap(rdpg->rp_pages[pageidx]);
 
                /* fill lu pages */
                for (i = 0; i < LU_PAGE_COUNT; i++, lp++, nob -= LU_PAGE_SIZE) {
@@ -822,9 +851,10 @@ int dt_index_walk(const struct lu_env *env, struct dt_object *obj,
                                /* end of index */
                                break;
                }
-               cfs_kunmap(rdpg->rp_pages[i]);
+               kunmap(rdpg->rp_pages[i]);
        }
 
+out:
        iops->put(env, it);
        iops->fini(env, it);
 
@@ -862,15 +892,10 @@ int dt_index_read(const struct lu_env *env, struct dt_device *dev,
        if (rdpg->rp_count <= 0 && (rdpg->rp_count & (LU_PAGE_SIZE - 1)) != 0)
                RETURN(-EFAULT);
 
-       if (fid_seq(&ii->ii_fid) >= FID_SEQ_NORMAL)
-               /* we don't support directory transfer via OBD_IDX_READ for the
-                * time being */
+       if (!fid_is_quota(&ii->ii_fid) && !fid_is_layout_rbtree(&ii->ii_fid) &&
+           !fid_is_norm(&ii->ii_fid))
                RETURN(-EOPNOTSUPP);
 
-       if (!fid_is_quota(&ii->ii_fid))
-               /* block access to all local files except quota files */
-               RETURN(-EPERM);
-
        /* lookup index object subject to the transfer */
        obj = dt_locate(env, dev, &ii->ii_fid);
        if (IS_ERR(obj))
@@ -892,35 +917,29 @@ int dt_index_read(const struct lu_env *env, struct dt_device *dev,
        }
 
        /* fill ii_flags with supported index features */
-       ii->ii_flags &= II_FL_NOHASH;
-
-       ii->ii_keysize = feat->dif_keysize_max;
-       if ((feat->dif_flags & DT_IND_VARKEY) != 0) {
-               /* key size is variable */
-               ii->ii_flags |= II_FL_VARKEY;
-               /* we don't support variable key size for the time being */
-               GOTO(out, rc = -EOPNOTSUPP);
-       }
+       ii->ii_flags &= (II_FL_NOHASH | II_FL_NOKEY | II_FL_VARKEY |
+                        II_FL_VARREC);
 
-       ii->ii_recsize = feat->dif_recsize_max;
-       if ((feat->dif_flags & DT_IND_VARREC) != 0) {
-               /* record size is variable */
-               ii->ii_flags |= II_FL_VARREC;
-               /* we don't support variable record size for the time being */
-               GOTO(out, rc = -EOPNOTSUPP);
-       }
+       if (!(feat->dif_flags & DT_IND_VARKEY))
+               ii->ii_keysize = feat->dif_keysize_max;
 
-       if ((feat->dif_flags & DT_IND_NONUNQ) != 0)
+       if (!(feat->dif_flags & DT_IND_VARREC))
+               ii->ii_recsize = feat->dif_recsize_max;
+
+       if (!(feat->dif_flags & DT_IND_NONUNQ))
                /* key isn't necessarily unique */
                ii->ii_flags |= II_FL_NONUNQ;
 
-       dt_read_lock(env, obj, 0);
-       /* fetch object version before walking the index */
-       ii->ii_version = dt_version_get(env, obj);
+       if (!fid_is_layout_rbtree(&ii->ii_fid)) {
+               dt_read_lock(env, obj, 0);
+               /* fetch object version before walking the index */
+               ii->ii_version = dt_version_get(env, obj);
+       }
 
        /* walk the index and fill lu_idxpages with key/record pairs */
-       rc = dt_index_walk(env, obj, rdpg, dt_index_page_build ,ii);
-       dt_read_unlock(env, obj);
+       rc = dt_index_walk(env, obj, rdpg, dt_index_page_build, ii);
+       if (!fid_is_layout_rbtree(&ii->ii_fid))
+               dt_read_unlock(env, obj);
 
        if (rc == 0) {
                /* index is empty */
@@ -936,7 +955,7 @@ out:
 EXPORT_SYMBOL(dt_index_read);
 
 #ifdef LPROCFS
-
+#ifndef HAVE_ONLY_PROCFS_SEQ
 int lprocfs_dt_rd_blksize(char *page, char **start, off_t off,
                          int count, int *eof, void *data)
 {
@@ -944,9 +963,9 @@ int lprocfs_dt_rd_blksize(char *page, char **start, off_t off,
        struct obd_statfs osfs;
 
        int rc = dt_statfs(NULL, dt, &osfs);
-       if (rc != 0) {
+       if (rc == 0) {
                *eof = 1;
-               rc = snprintf(page, count, "%d\n",
+               rc = snprintf(page, count, "%u\n",
                                (unsigned) osfs.os_bsize);
        }
 
@@ -961,7 +980,7 @@ int lprocfs_dt_rd_kbytestotal(char *page, char **start, off_t off,
        struct obd_statfs osfs;
 
        int rc = dt_statfs(NULL, dt, &osfs);
-       if (rc != 0) {
+       if (rc == 0) {
                __u32 blk_size = osfs.os_bsize >> 10;
                __u64 result = osfs.os_blocks;
 
@@ -983,7 +1002,7 @@ int lprocfs_dt_rd_kbytesfree(char *page, char **start, off_t off,
        struct obd_statfs osfs;
 
        int rc = dt_statfs(NULL, dt, &osfs);
-       if (rc != 0) {
+       if (rc == 0) {
                __u32 blk_size = osfs.os_bsize >> 10;
                __u64 result = osfs.os_bfree;
 
@@ -1005,7 +1024,7 @@ int lprocfs_dt_rd_kbytesavail(char *page, char **start, off_t off,
        struct obd_statfs osfs;
 
        int rc = dt_statfs(NULL, dt, &osfs);
-       if (rc != 0) {
+       if (rc == 0) {
                __u32 blk_size = osfs.os_bsize >> 10;
                __u64 result = osfs.os_bavail;
 
@@ -1027,7 +1046,7 @@ int lprocfs_dt_rd_filestotal(char *page, char **start, off_t off,
        struct obd_statfs osfs;
 
        int rc = dt_statfs(NULL, dt, &osfs);
-       if (rc != 0) {
+       if (rc == 0) {
                *eof = 1;
                rc = snprintf(page, count, LPU64"\n", osfs.os_files);
        }
@@ -1043,7 +1062,7 @@ int lprocfs_dt_rd_filesfree(char *page, char **start, off_t off,
        struct obd_statfs osfs;
 
        int rc = dt_statfs(NULL, dt, &osfs);
-       if (rc != 0) {
+       if (rc == 0) {
                *eof = 1;
                rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
        }
@@ -1051,5 +1070,99 @@ int lprocfs_dt_rd_filesfree(char *page, char **start, off_t off,
        return rc;
 }
 EXPORT_SYMBOL(lprocfs_dt_rd_filesfree);
+#endif
+
+int lprocfs_dt_blksize_seq_show(struct seq_file *m, void *v)
+{
+       struct dt_device *dt = m->private;
+       struct obd_statfs osfs;
+
+       int rc = dt_statfs(NULL, dt, &osfs);
+       if (rc == 0)
+               seq_printf(m, "%u\n", (unsigned) osfs.os_bsize);
+       return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_blksize_seq_show);
+
+int lprocfs_dt_kbytestotal_seq_show(struct seq_file *m, void *v)
+{
+       struct dt_device *dt = m->private;
+       struct obd_statfs osfs;
+
+       int rc = dt_statfs(NULL, dt, &osfs);
+       if (rc == 0) {
+               __u32 blk_size = osfs.os_bsize >> 10;
+               __u64 result = osfs.os_blocks;
+
+               while (blk_size >>= 1)
+                       result <<= 1;
+
+               seq_printf(m, LPU64"\n", result);
+       }
+       return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_kbytestotal_seq_show);
+
+int lprocfs_dt_kbytesfree_seq_show(struct seq_file *m, void *v)
+{
+       struct dt_device *dt = m->private;
+       struct obd_statfs osfs;
+
+       int rc = dt_statfs(NULL, dt, &osfs);
+       if (rc == 0) {
+               __u32 blk_size = osfs.os_bsize >> 10;
+               __u64 result = osfs.os_bfree;
+
+               while (blk_size >>= 1)
+                       result <<= 1;
+
+               seq_printf(m, LPU64"\n", result);
+       }
+       return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_kbytesfree_seq_show);
+
+int lprocfs_dt_kbytesavail_seq_show(struct seq_file *m, void *v)
+{
+       struct dt_device *dt = m->private;
+       struct obd_statfs osfs;
+
+       int rc = dt_statfs(NULL, dt, &osfs);
+       if (rc == 0) {
+               __u32 blk_size = osfs.os_bsize >> 10;
+               __u64 result = osfs.os_bavail;
+
+               while (blk_size >>= 1)
+                       result <<= 1;
+
+               seq_printf(m, LPU64"\n", result);
+       }
+       return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_kbytesavail_seq_show);
+
+int lprocfs_dt_filestotal_seq_show(struct seq_file *m, void *v)
+{
+       struct dt_device *dt = m->private;
+       struct obd_statfs osfs;
+
+       int rc = dt_statfs(NULL, dt, &osfs);
+       if (rc == 0)
+               seq_printf(m, LPU64"\n", osfs.os_files);
+       return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_filestotal_seq_show);
+
+int lprocfs_dt_filesfree_seq_show(struct seq_file *m, void *v)
+{
+       struct dt_device *dt = m->private;
+       struct obd_statfs osfs;
+
+       int rc = dt_statfs(NULL, dt, &osfs);
+       if (rc == 0)
+               seq_printf(m, LPU64"\n", osfs.os_ffree);
+       return rc;
+}
+EXPORT_SYMBOL(lprocfs_dt_filesfree_seq_show);
 
 #endif /* LPROCFS */