#include <lustre/lustre_idl.h>
#include <lustre_disk.h> /* for changelogs */
#include <lustre_param.h>
+#include <lustre_fid.h>
#include "mdd_internal.h"
const struct md_device_operations mdd_ops;
+static struct lu_device_type mdd_device_type;
static const char mdd_root_dir_name[] = "ROOT";
+static const char mdd_obf_dir_name[] = "fid";
+static const char mdd_dot_lustre_name[] = ".lustre";
static int mdd_device_init(const struct lu_env *env, struct lu_device *d,
const char *name, struct lu_device *next)
ENTRY;
mdd_changelog_fini(env, m);
dt_txn_callback_del(m->mdd_child, &m->mdd_txn_cb);
+ mdd_object_put(env, m->mdd_dot_lustre_objs.mdd_obf);
+ mdd_object_put(env, m->mdd_dot_lustre);
if (m->mdd_obd_dev)
mdd_fini_obd(env, m, cfg);
orph_index_fini(env, m);
RETURN(rc);
}
+/**
+ * Create ".lustre" directory.
+ */
+static int create_dot_lustre_dir(const struct lu_env *env, struct mdd_device *m)
+{
+ struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
+ struct md_object *mdo;
+ int rc;
+
+ memcpy(fid, &LU_DOT_LUSTRE_FID, sizeof(struct lu_fid));
+ mdo = llo_store_create_index(env, &m->mdd_md_dev, m->mdd_child,
+ mdd_root_dir_name, mdd_dot_lustre_name,
+ fid, &dt_directory_features);
+ /* .lustre dir may be already present */
+ if (IS_ERR(mdo) && PTR_ERR(mdo) != -EEXIST) {
+ rc = PTR_ERR(mdo);
+ CERROR("creating obj [%s] fid = "DFID" rc = %d\n",
+ mdd_dot_lustre_name, PFID(fid), rc);
+ RETURN(rc);
+ }
+
+ return 0;
+}
+
+static int dot_lustre_attr_get(const struct lu_env *env, struct md_object *obj,
+ struct md_attr *ma)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+
+ return mdd_attr_get_internal_locked(env, mdd_obj, ma);
+}
+
+static int dot_lustre_attr_set(const struct lu_env *env, struct md_object *obj,
+ const struct md_attr *ma)
+{
+ return -EPERM;
+}
+
+static int dot_lustre_xattr_get(const struct lu_env *env,
+ struct md_object *obj, struct lu_buf *buf,
+ const char *name)
+{
+ return 0;
+}
+
+/**
+ * Direct access to the ".lustre" directory is not allowed.
+ */
+static int dot_lustre_mdd_open(const struct lu_env *env, struct md_object *obj,
+ int flags)
+{
+ return -EPERM;
+}
+
+static int dot_lustre_path(const struct lu_env *env, struct md_object *obj,
+ char *path, int pathlen, __u64 recno, int *linkno)
+{
+ return -ENOSYS;
+}
+
+static struct md_object_operations mdd_dot_lustre_obj_ops = {
+ .moo_attr_get = dot_lustre_attr_get,
+ .moo_attr_set = dot_lustre_attr_set,
+ .moo_xattr_get = dot_lustre_xattr_get,
+ .moo_open = dot_lustre_mdd_open,
+ .moo_path = dot_lustre_path
+};
+
+static int dot_lustre_lookup(const struct lu_env *env, struct md_object *p,
+ const struct lu_name *lname, struct lu_fid *f,
+ struct md_op_spec *spec)
+{
+ if (strcmp(lname->ln_name, mdd_obf_dir_name) == 0)
+ *f = LU_OBF_FID;
+ else
+ return -ENOENT;
+
+ return 0;
+}
+
+static int dot_lustre_create(const struct lu_env *env, struct md_object *pobj,
+ const struct lu_name *lname,
+ struct md_object *child, struct md_op_spec *spec,
+ struct md_attr* ma)
+{
+ return -EPERM;
+}
+
+static int dot_lustre_rename(const struct lu_env *env,
+ struct md_object *src_pobj,
+ struct md_object *tgt_pobj,
+ const struct lu_fid *lf,
+ const struct lu_name *lsname,
+ struct md_object *tobj,
+ const struct lu_name *ltname, struct md_attr *ma)
+{
+ return -EPERM;
+}
+
+static int dot_lustre_link(const struct lu_env *env, struct md_object *tgt_obj,
+ struct md_object *src_obj,
+ const struct lu_name *lname, struct md_attr *ma)
+{
+ return -EPERM;
+}
+
+static int dot_lustre_unlink(const struct lu_env *env, struct md_object *pobj,
+ struct md_object *cobj, const struct lu_name *lname,
+ struct md_attr *ma)
+{
+ return -EPERM;
+}
+
+static struct md_dir_operations mdd_dot_lustre_dir_ops = {
+ .mdo_lookup = dot_lustre_lookup,
+ .mdo_create = dot_lustre_create,
+ .mdo_rename = dot_lustre_rename,
+ .mdo_link = dot_lustre_link,
+ .mdo_unlink = dot_lustre_unlink,
+};
+
+static int obf_attr_get(const struct lu_env *env, struct md_object *obj,
+ struct md_attr *ma)
+{
+ int rc = 0;
+
+ if (ma->ma_need & MA_INODE) {
+ struct mdd_device *mdd = mdo2mdd(obj);
+
+ /* "fid" is a virtual object and hence does not have any "real"
+ * attributes. So we reuse attributes of .lustre for "fid" dir */
+ ma->ma_need |= MA_INODE;
+ rc = dot_lustre_attr_get(env, &mdd->mdd_dot_lustre->mod_obj, ma);
+ if (rc)
+ return rc;
+ ma->ma_valid |= MA_INODE;
+ }
+
+ /* "fid" directory does not have any striping information. */
+ if (ma->ma_need & MA_LOV) {
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+
+ if (ma->ma_valid & MA_LOV)
+ return 0;
+
+ if (!(S_ISREG(mdd_object_type(mdd_obj)) ||
+ S_ISDIR(mdd_object_type(mdd_obj))))
+ return 0;
+
+ if (ma->ma_need & MA_LOV_DEF) {
+ rc = mdd_get_default_md(mdd_obj, ma->ma_lmm,
+ &ma->ma_lmm_size);
+ if (rc > 0) {
+ ma->ma_valid |= MA_LOV;
+ rc = 0;
+ }
+ }
+ }
+
+ return rc;
+}
+
+static int obf_attr_set(const struct lu_env *env, struct md_object *obj,
+ const struct md_attr *ma)
+{
+ return -EPERM;
+}
+
+static int obf_xattr_get(const struct lu_env *env,
+ struct md_object *obj, struct lu_buf *buf,
+ const char *name)
+{
+ return 0;
+}
+
+static int obf_mdd_open(const struct lu_env *env, struct md_object *obj,
+ int flags)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+
+ mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
+ mdd_obj->mod_count++;
+ mdd_write_unlock(env, mdd_obj);
+
+ return 0;
+}
+
+static int obf_mdd_close(const struct lu_env *env, struct md_object *obj,
+ struct md_attr *ma)
+{
+ struct mdd_object *mdd_obj = md2mdd_obj(obj);
+
+ mdd_write_lock(env, mdd_obj, MOR_TGT_CHILD);
+ mdd_obj->mod_count--;
+ mdd_write_unlock(env, mdd_obj);
+
+ return 0;
+}
+
+/** Nothing to list in "fid" directory */
+static int obf_mdd_readpage(const struct lu_env *env, struct md_object *obj,
+ const struct lu_rdpg *rdpg)
+{
+ return -EPERM;
+}
+
+static int obf_path(const struct lu_env *env, struct md_object *obj,
+ char *path, int pathlen, __u64 recno, int *linkno)
+{
+ return -ENOSYS;
+}
+
+static struct md_object_operations mdd_obf_obj_ops = {
+ .moo_attr_get = obf_attr_get,
+ .moo_attr_set = obf_attr_set,
+ .moo_xattr_get = obf_xattr_get,
+ .moo_open = obf_mdd_open,
+ .moo_close = obf_mdd_close,
+ .moo_readpage = obf_mdd_readpage,
+ .moo_path = obf_path
+};
+
+/**
+ * Lookup method for "fid" object. Only filenames with correct SEQ:OID format
+ * are valid. We also check if object with passed fid exists or not.
+ */
+static int obf_lookup(const struct lu_env *env, struct md_object *p,
+ const struct lu_name *lname, struct lu_fid *f,
+ struct md_op_spec *spec)
+{
+ char *name = (char *)lname->ln_name;
+ struct mdd_device *mdd = mdo2mdd(p);
+ struct mdd_object *child;
+ int rc = 0;
+
+ while (*name == '[')
+ name++;
+
+ sscanf(name, SFID, &(f->f_seq), &(f->f_oid),
+ &(f->f_ver));
+ if (!fid_is_sane(f)) {
+ CWARN("bad FID format [%s], should be "DFID"\n", lname->ln_name,
+ (__u64)1, 2, 0);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ /* Check if object with this fid exists */
+ child = mdd_object_find(env, mdd, f);
+ if (child == NULL)
+ GOTO(out, rc = 0);
+ if (IS_ERR(child))
+ GOTO(out, rc = PTR_ERR(child));
+
+ if (mdd_object_exists(child) == 0)
+ rc = -ENOENT;
+
+ mdd_object_put(env, child);
+
+out:
+ return rc;
+}
+
+static int obf_create(const struct lu_env *env, struct md_object *pobj,
+ const struct lu_name *lname, struct md_object *child,
+ struct md_op_spec *spec, struct md_attr* ma)
+{
+ return -EPERM;
+}
+
+static int obf_rename(const struct lu_env *env,
+ struct md_object *src_pobj, struct md_object *tgt_pobj,
+ const struct lu_fid *lf, const struct lu_name *lsname,
+ struct md_object *tobj, const struct lu_name *ltname,
+ struct md_attr *ma)
+{
+ return -EPERM;
+}
+
+static int obf_link(const struct lu_env *env, struct md_object *tgt_obj,
+ struct md_object *src_obj, const struct lu_name *lname,
+ struct md_attr *ma)
+{
+ return -EPERM;
+}
+
+static int obf_unlink(const struct lu_env *env, struct md_object *pobj,
+ struct md_object *cobj, const struct lu_name *lname,
+ struct md_attr *ma)
+{
+ return -EPERM;
+}
+
+static struct md_dir_operations mdd_obf_dir_ops = {
+ .mdo_lookup = obf_lookup,
+ .mdo_create = obf_create,
+ .mdo_rename = obf_rename,
+ .mdo_link = obf_link,
+ .mdo_unlink = obf_unlink
+};
+
+/**
+ * Create special in-memory "fid" object for open-by-fid.
+ */
+static int mdd_obf_setup(const struct lu_env *env, struct mdd_device *m)
+{
+ struct mdd_object *mdd_obf;
+ struct lu_object *obf_lu_obj;
+ int rc = 0;
+
+ m->mdd_dot_lustre_objs.mdd_obf = mdd_object_find(env, m,
+ &LU_OBF_FID);
+ if (m->mdd_dot_lustre_objs.mdd_obf == NULL ||
+ IS_ERR(m->mdd_dot_lustre_objs.mdd_obf))
+ GOTO(out, rc = -ENOENT);
+
+ mdd_obf = m->mdd_dot_lustre_objs.mdd_obf;
+ mdd_obf->mod_obj.mo_dir_ops = &mdd_obf_dir_ops;
+ mdd_obf->mod_obj.mo_ops = &mdd_obf_obj_ops;
+ /* Don't allow objects to be created in "fid" dir */
+ mdd_obf->mod_flags |= IMMUTE_OBJ;
+
+ obf_lu_obj = mdd2lu_obj(mdd_obf);
+ obf_lu_obj->lo_header->loh_attr |= (LOHA_EXISTS | S_IFDIR);
+
+out:
+ return rc;
+}
+
+/** Setup ".lustre" directory object */
+static int mdd_dot_lustre_setup(const struct lu_env *env, struct mdd_device *m)
+{
+ struct dt_object *dt_dot_lustre;
+ struct lu_fid *fid = &mdd_env_info(env)->mti_fid;
+ int rc;
+
+ rc = create_dot_lustre_dir(env, m);
+ if (rc)
+ return rc;
+
+ dt_dot_lustre = dt_store_open(env, m->mdd_child, mdd_root_dir_name,
+ mdd_dot_lustre_name, fid);
+ if (IS_ERR(dt_dot_lustre)) {
+ rc = PTR_ERR(dt_dot_lustre);
+ GOTO(out, rc);
+ }
+
+ /* references are released in mdd_device_shutdown() */
+ m->mdd_dot_lustre = lu2mdd_obj(lu_object_locate(dt_dot_lustre->do_lu.lo_header,
+ &mdd_device_type));
+
+ lu_object_put(env, &dt_dot_lustre->do_lu);
+
+ m->mdd_dot_lustre->mod_obj.mo_dir_ops = &mdd_dot_lustre_dir_ops;
+ m->mdd_dot_lustre->mod_obj.mo_ops = &mdd_dot_lustre_obj_ops;
+
+ rc = mdd_obf_setup(env, m);
+ if (rc)
+ CERROR("Error initializing \"fid\" object - %d.\n", rc);
+
+out:
+ RETURN(rc);
+}
+
static int mdd_process_config(const struct lu_env *env,
struct lu_device *d, struct lustre_cfg *cfg)
{
LASSERT(root != NULL);
lu_object_put(env, &root->do_lu);
rc = orph_index_init(env, mdd);
- } else
+ } else {
rc = PTR_ERR(root);
+ }
+ if (rc)
+ GOTO(out, rc);
+
+ rc = mdd_dot_lustre_setup(env, mdd);
+ if (rc) {
+ CERROR("Error(%d) initializing .lustre objects\n", rc);
+ GOTO(out, rc);
+ }
out:
RETURN(rc);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff