#define DEBUG_SUBSYSTEM S_MDS
+#include <lprocfs_status.h>
#include "mdt_internal.h"
#include <lustre_lmv.h>
/* for cross-ref mkdir, mds capa has been fetched from remote obj, then
* we won't go to below*/
- if (repbody->valid & OBD_MD_FLMDSCAPA)
+ if (repbody->mbo_valid & OBD_MD_FLMDSCAPA)
RETURN(rc);
if (rc == 0 && info->mti_mdt->mdt_lut.lut_mds_capa &&
rc = mo_capa_get(info->mti_env, mdt_object_child(object), capa,
0);
if (rc == 0)
- repbody->valid |= OBD_MD_FLMDSCAPA;
+ repbody->mbo_valid |= OBD_MD_FLMDSCAPA;
}
RETURN(rc);
}
+/**
+ * mdt_remote_permission: Check whether the remote operation is permitted,
+ *
+ * Before we implement async cross-MDT updates (DNE phase 2). There are a few
+ * limitations here:
+ *
+ * 1.Only sysadmin can create remote directory and striped directory and
+ * migrate directory now, unless
+ * lctl set_param mdt.*.enable_remote_dir_gid=allow_gid.
+ * 2.Remote directory can only be created on MDT0, unless
+ * lctl set_param mdt.*.enable_remote_dir = 1
+ * 3.Only new clients can access remote dir( >= 2.4) and striped dir(>= 2.6),
+ * old client will return -ENOTSUPP.
+ *
+ * XXX these check are only needed for remote synchronization, once async
+ * update is supported, these check will be removed.
+ *
+ * param[in]info: execution environment.
+ * param[in]parent: the directory of this operation.
+ * param[in]child: the child of this operation.
+ *
+ * retval = 0 remote operation is allowed.
+ * < 0 remote operation is denied.
+ */
+static int mdt_remote_permission(struct mdt_thread_info *info,
+ struct mdt_object *parent,
+ struct mdt_object *child)
+{
+ struct mdt_device *mdt = info->mti_mdt;
+ struct lu_ucred *uc = mdt_ucred(info);
+ struct md_op_spec *spec = &info->mti_spec;
+ struct lu_attr *attr = &info->mti_attr.ma_attr;
+ struct obd_export *exp = mdt_info_req(info)->rq_export;
+
+ /* Only check create remote directory, striped directory and
+ * migration */
+ if (mdt_object_remote(parent) == 0 && mdt_object_remote(child) == 0 &&
+ !(S_ISDIR(attr->la_mode) && spec->u.sp_ea.eadata != NULL &&
+ spec->u.sp_ea.eadatalen != 0) &&
+ info->mti_rr.rr_opcode != REINT_MIGRATE)
+ return 0;
+
+ if (!md_capable(uc, CFS_CAP_SYS_ADMIN)) {
+ if (uc->uc_gid != mdt->mdt_enable_remote_dir_gid &&
+ mdt->mdt_enable_remote_dir_gid != -1)
+ return -EPERM;
+ }
+
+ if (mdt->mdt_enable_remote_dir == 0) {
+ struct seq_server_site *ss = mdt_seq_site(mdt);
+ struct lu_seq_range range = { 0 };
+ int rc;
+
+ fld_range_set_type(&range, LU_SEQ_RANGE_MDT);
+ rc = fld_server_lookup(info->mti_env, ss->ss_server_fld,
+ fid_seq(mdt_object_fid(parent)), &range);
+ if (rc != 0)
+ return rc;
+
+ if (range.lsr_index != 0)
+ return -EPERM;
+ }
+
+ if (!mdt_is_dne_client(exp))
+ return -ENOTSUPP;
+
+ if (S_ISDIR(attr->la_mode) && spec->u.sp_ea.eadata != NULL &&
+ spec->u.sp_ea.eadatalen != 0 && !mdt_is_striped_client(exp))
+ return -ENOTSUPP;
+
+ return 0;
+}
+
/*
* VBR: we save three versions in reply:
* 0 - parent. Check that parent version is the same during replay.
if (likely(!IS_ERR(child))) {
struct md_object *next = mdt_object_child(parent);
- if (mdt_object_remote(child)) {
- struct seq_server_site *ss;
- struct lu_ucred *uc = mdt_ucred(info);
-
- if (!md_capable(uc, CFS_CAP_SYS_ADMIN)) {
- if (uc->uc_gid !=
- mdt->mdt_enable_remote_dir_gid &&
- mdt->mdt_enable_remote_dir_gid != -1) {
- CERROR("%s: Creating remote dir is only"
- " permitted for administrator or"
- " set mdt_enable_remote_dir_gid:"
- " rc = %d\n",
- mdt_obd_name(mdt), -EPERM);
- GOTO(out_put_child, rc = -EPERM);
- }
- }
-
- ss = mdt_seq_site(mdt);
- if (ss->ss_node_id != 0 &&
- mdt->mdt_enable_remote_dir == 0) {
- CERROR("%s: remote dir is only permitted on"
- " MDT0 or set_param"
- " mdt.*.enable_remote_dir=1\n",
- mdt_obd_name(mdt));
- GOTO(out_put_child, rc = -EPERM);
- }
- if (!mdt_is_dne_client(mdt_info_req(info)->rq_export)) {
- /* Return -EIO for old client */
- GOTO(out_put_child, rc = -EIO);
- }
+ rc = mdt_remote_permission(info, parent, child);
+ if (rc != 0)
+ GOTO(out_put_child, rc);
- }
- ma->ma_need = MA_INODE;
+ ma->ma_need = MA_INODE;
ma->ma_valid = 0;
/* capa for cross-ref will be stored here */
ma->ma_capa = req_capsule_server_get(info->mti_pill,
if (rc == 0)
rc = mdt_attr_get_complex(info, child, ma);
- if (rc == 0) {
- /* Return fid & attr to client. */
- if (ma->ma_valid & MA_INODE)
- mdt_pack_attr2body(info, repbody, &ma->ma_attr,
- mdt_object_fid(child));
- }
+ if (rc == 0) {
+ /* Return fid & attr to client. */
+ if (ma->ma_valid & MA_INODE)
+ mdt_pack_attr2body(info, repbody, &ma->ma_attr,
+ mdt_object_fid(child));
+ }
out_put_child:
- mdt_object_put(info->mti_env, child);
- } else {
- rc = PTR_ERR(child);
- }
- mdt_create_pack_capa(info, rc, child, repbody);
+ mdt_create_pack_capa(info, rc, child, repbody);
+ mdt_object_put(info->mti_env, child);
+ } else {
+ rc = PTR_ERR(child);
+ mdt_create_pack_capa(info, rc, NULL, repbody);
+ }
unlock_parent:
mdt_object_unlock(info, parent, lh, rc);
put_parent:
static int mdt_unlock_slaves(struct mdt_thread_info *mti,
struct mdt_object *obj, __u64 ibits,
+ struct mdt_lock_handle *s0_lh,
+ struct mdt_object *s0_obj,
struct ldlm_enqueue_info *einfo)
{
ldlm_policy_data_t *policy = &mti->mti_policy;
if (!S_ISDIR(obj->mot_header.loh_attr))
RETURN(0);
+ /* Unlock stripe 0 */
+ if (s0_lh != NULL && lustre_handle_is_used(&s0_lh->mlh_reg_lh)) {
+ LASSERT(s0_obj != NULL);
+ mdt_object_unlock_put(mti, s0_obj, s0_lh, 1);
+ }
+
memset(policy, 0, sizeof(*policy));
policy->l_inodebits.bits = ibits;
**/
static int mdt_lock_slaves(struct mdt_thread_info *mti, struct mdt_object *obj,
ldlm_mode_t mode, __u64 ibits,
+ struct mdt_lock_handle *s0_lh,
+ struct mdt_object **s0_objp,
struct ldlm_enqueue_info *einfo)
{
ldlm_policy_data_t *policy = &mti->mti_policy;
- int rc;
+ struct lu_buf *buf = &mti->mti_buf;
+ struct lmv_mds_md_v1 *lmv;
+ struct lu_fid *fid = &mti->mti_tmp_fid1;
+ int rc;
ENTRY;
if (!S_ISDIR(obj->mot_header.loh_attr))
RETURN(0);
+ buf->lb_buf = mti->mti_xattr_buf;
+ buf->lb_len = sizeof(mti->mti_xattr_buf);
+ rc = mo_xattr_get(mti->mti_env, mdt_object_child(obj), buf,
+ XATTR_NAME_LMV);
+ if (rc == -ERANGE) {
+ rc = mdt_big_xattr_get(mti, obj, XATTR_NAME_LMV);
+ if (rc > 0) {
+ buf->lb_buf = mti->mti_big_lmm;
+ buf->lb_len = mti->mti_big_lmmsize;
+ }
+ }
+
+ if (rc == -ENODATA || rc == -ENOENT)
+ RETURN(0);
+
+ if (rc <= 0)
+ RETURN(rc);
+
+ lmv = buf->lb_buf;
+ if (le32_to_cpu(lmv->lmv_magic) != LMV_MAGIC_V1)
+ RETURN(-EINVAL);
+
+ /* Sigh, 0_stripe and master object are different
+ * object, though they are in the same MDT, to avoid
+ * adding osd_object_lock here, so we will enqueue the
+ * stripe0 lock in MDT0 for now */
+ fid_le_to_cpu(fid, &lmv->lmv_stripe_fids[0]);
+ *s0_objp = mdt_object_find_lock(mti, fid, s0_lh, ibits);
+ if (IS_ERR(*s0_objp))
+ RETURN(PTR_ERR(*s0_objp));
+
memset(einfo, 0, sizeof(*einfo));
einfo->ei_type = LDLM_IBITS;
einfo->ei_mode = mode;
RETURN(rc);
}
-int mdt_attr_set(struct mdt_thread_info *info, struct mdt_object *mo,
- struct md_attr *ma, int flags)
+static int mdt_attr_set(struct mdt_thread_info *info, struct mdt_object *mo,
+ struct md_attr *ma)
{
- struct mdt_lock_handle *lh;
- int do_vbr = ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID|LA_FLAGS);
- __u64 lockpart = MDS_INODELOCK_UPDATE;
+ struct mdt_lock_handle *lh;
+ int do_vbr = ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID|LA_FLAGS);
+ __u64 lockpart = MDS_INODELOCK_UPDATE;
struct ldlm_enqueue_info *einfo = &info->mti_einfo;
- int rc;
- ENTRY;
-
- /* attr shouldn't be set on remote object */
- LASSERT(!mdt_object_remote(mo));
+ struct mdt_lock_handle *s0_lh;
+ struct mdt_object *s0_obj = NULL;
+ int rc;
+ ENTRY;
lh = &info->mti_lh[MDT_LH_PARENT];
mdt_lock_reg_init(lh, LCK_PW);
if (rc != 0)
RETURN(rc);
- rc = mdt_lock_slaves(info, mo, LCK_EX, lockpart, einfo);
+ s0_lh = &info->mti_lh[MDT_LH_LOCAL];
+ mdt_lock_reg_init(s0_lh, LCK_PW);
+ rc = mdt_lock_slaves(info, mo, LCK_PW, lockpart, s0_lh, &s0_obj, einfo);
if (rc != 0)
GOTO(out_unlock, rc);
- if (mdt_object_exists(mo) == 0)
- GOTO(out_unlock, rc = -ENOENT);
-
/* all attrs are packed into mti_attr in unpack_setattr */
mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
OBD_FAIL_MDS_REINT_SETATTR_WRITE);
EXIT;
out_unlock:
- mdt_unlock_slaves(info, mo, lockpart, einfo);
+ mdt_unlock_slaves(info, mo, lockpart, s0_lh, s0_obj, einfo);
mdt_object_unlock(info, mo, lh, rc);
return rc;
}
if (IS_ERR(mo))
GOTO(out, rc = PTR_ERR(mo));
+ if (!mdt_object_exists(mo))
+ GOTO(out_put, rc = -ENOENT);
+
+ if (mdt_object_remote(mo))
+ GOTO(out_put, rc = -EREMOTE);
+
/* start a log jounal handle if needed */
if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM)) {
if ((ma->ma_attr.la_valid & LA_SIZE) ||
}
mdt_ioepoch_open(info, mo, 0);
- repbody->ioepoch = mo->mot_ioepoch;
+ repbody->mbo_ioepoch = mo->mot_ioepoch;
mdt_object_get(info->mti_env, mo);
mdt_mfd_set_mode(mfd, MDS_FMODE_TRUNC);
mfd->mfd_xid = req->rq_xid;
spin_lock(&med->med_open_lock);
- cfs_list_add(&mfd->mfd_list, &med->med_open_head);
+ list_add(&mfd->mfd_list, &med->med_open_head);
spin_unlock(&med->med_open_lock);
- repbody->handle.cookie = mfd->mfd_handle.h_cookie;
+ repbody->mbo_handle.cookie = mfd->mfd_handle.h_cookie;
}
som_au = info->mti_ioepoch && info->mti_ioepoch->flags & MF_SOM_CHANGE;
if (som_au) {
/* SOM Attribute update case. Find the proper mfd and update
* SOM attributes on the proper object. */
- LASSERT(mdt_conn_flags(info) & OBD_CONNECT_SOM);
- LASSERT(info->mti_ioepoch);
+ if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM))
+ GOTO(out_put, rc = -EPROTO);
spin_lock(&med->med_open_lock);
mfd = mdt_handle2mfd(med, &info->mti_ioepoch->handle,
info->mti_ioepoch->handle.cookie);
GOTO(out_put, rc = -ESTALE);
}
- LASSERT(mfd->mfd_mode == MDS_FMODE_SOM);
- LASSERT(!(info->mti_ioepoch->flags & MF_EPOCH_CLOSE));
- class_handle_unhash(&mfd->mfd_handle);
- cfs_list_del_init(&mfd->mfd_list);
+ if (mfd->mfd_mode != MDS_FMODE_SOM ||
+ (info->mti_ioepoch->flags & MF_EPOCH_CLOSE))
+ GOTO(out_put, rc = -EPROTO);
+
+ class_handle_unhash(&mfd->mfd_handle);
+ list_del_init(&mfd->mfd_list);
spin_unlock(&med->med_open_lock);
mdt_mfd_close(info, mfd);
} else if ((ma->ma_valid & MA_INODE) && ma->ma_attr.la_valid) {
- LASSERT((ma->ma_valid & MA_LOV) == 0);
- rc = mdt_attr_set(info, mo, ma, rr->rr_flags);
+ if (ma->ma_valid & MA_LOV)
+ GOTO(out_put, rc = -EPROTO);
+
+ rc = mdt_attr_set(info, mo, ma);
if (rc)
GOTO(out_put, rc);
} else if ((ma->ma_valid & MA_LOV) && (ma->ma_valid & MA_INODE)) {
struct lu_buf *buf = &info->mti_buf;
- LASSERT(ma->ma_attr.la_valid == 0);
+
+ if (ma->ma_attr.la_valid != 0)
+ GOTO(out_put, rc = -EPROTO);
+
buf->lb_buf = ma->ma_lmm;
buf->lb_len = ma->ma_lmm_size;
rc = mo_xattr_set(info->mti_env, mdt_object_child(mo),
} else if ((ma->ma_valid & MA_LMV) && (ma->ma_valid & MA_INODE)) {
struct lu_buf *buf = &info->mti_buf;
- LASSERT(ma->ma_attr.la_valid == 0);
+ if (ma->ma_attr.la_valid != 0)
+ GOTO(out_put, rc = -EPROTO);
+
buf->lb_buf = ma->ma_lmv;
buf->lb_len = ma->ma_lmv_size;
rc = mo_xattr_set(info->mti_env, mdt_object_child(mo),
buf, XATTR_NAME_DEFAULT_LMV, 0);
if (rc)
GOTO(out_put, rc);
- } else
- LBUG();
+ } else {
+ GOTO(out_put, rc = -EPROTO);
+ }
/* If file data is modified, add the dirty flag */
if (ma->ma_attr_flags & MDS_DATA_MODIFIED)
rc = mo_capa_get(info->mti_env, mdt_object_child(mo), capa, 0);
if (rc)
GOTO(out_put, rc);
- repbody->valid |= OBD_MD_FLOSSCAPA;
+ repbody->mbo_valid |= OBD_MD_FLOSSCAPA;
}
EXIT;
struct mdt_lock_handle *parent_lh;
struct mdt_lock_handle *child_lh;
struct ldlm_enqueue_info *einfo = &info->mti_einfo;
+ struct mdt_lock_handle *s0_lh = NULL;
+ struct mdt_object *s0_obj = NULL;
int rc;
int no_name = 0;
ENTRY;
PNAME(&rr->rr_name), PFID(mdt_object_fid(mc)));
if (!mdt_is_dne_client(req->rq_export))
- /* Return -EIO for old client */
- GOTO(put_child, rc = -EIO);
+ /* Return -ENOTSUPP for old client */
+ GOTO(put_child, rc = -ENOTSUPP);
if (info->mti_spec.sp_rm_entry) {
struct lu_ucred *uc = mdt_ucred(info);
MDT_CROSS_LOCK);
repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
LASSERT(repbody != NULL);
- repbody->fid1 = *mdt_object_fid(mc);
- repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
+ repbody->mbo_fid1 = *mdt_object_fid(mc);
+ repbody->mbo_valid |= (OBD_MD_FLID | OBD_MD_MDS);
GOTO(unlock_child, rc = -EREMOTE);
} else if (info->mti_spec.sp_rm_entry) {
rc = -EPERM;
ma->ma_need = MA_INODE;
ma->ma_valid = 0;
- rc = mdt_lock_slaves(info, mc, LCK_EX, MDS_INODELOCK_UPDATE, einfo);
+ s0_lh = &info->mti_lh[MDT_LH_LOCAL];
+ mdt_lock_reg_init(s0_lh, LCK_EX);
+ rc = mdt_lock_slaves(info, mc, LCK_EX, MDS_INODELOCK_UPDATE, s0_lh,
+ &s0_obj, einfo);
if (rc != 0)
GOTO(unlock_child, rc);
EXIT;
unlock_child:
- mdt_unlock_slaves(info, mc, MDS_INODELOCK_UPDATE, einfo);
+ mdt_unlock_slaves(info, mc, MDS_INODELOCK_UPDATE, s0_lh, s0_obj, einfo);
mdt_object_unlock(info, mc, child_lh, rc);
-
- /* Since we do not need reply md striped dir info to client, so
- * reset mti_big_lmm_used to avoid confusing mdt_fix_reply */
- if (info->mti_big_lmm_used)
- info->mti_big_lmm_used = 0;
put_child:
mdt_object_put(info->mti_env, mc);
unlock_parent:
if (rc)
GOTO(out_unlock_parent, rc);
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME3, 5);
+
/* step 2: find & lock the source */
lhs = &info->mti_lh[MDT_LH_CHILD];
mdt_lock_reg_init(lhs, LCK_EX);
* target. Source should not be ancestor of target dir. May be other rename
* checks can be moved here later.
*/
-static int mdt_rename_sanity(struct mdt_thread_info *info, struct lu_fid *fid)
+static int mdt_is_subdir(struct mdt_thread_info *info,
+ struct mdt_object *dir,
+ const struct lu_fid *fid)
{
- struct mdt_reint_record *rr = &info->mti_rr;
- struct lu_fid dst_fid = *rr->rr_fid2;
- struct mdt_object *dst;
+ struct lu_fid dir_fid = dir->mot_header.loh_fid;
int rc = 0;
ENTRY;
/* If the source and target are in the same directory, they can not
* be parent/child relationship, so subdir check is not needed */
- if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2))
+ if (lu_fid_eq(&dir_fid, fid))
return 0;
- do {
- LASSERT(fid_is_sane(&dst_fid));
- dst = mdt_object_find(info->mti_env, info->mti_mdt, &dst_fid);
- if (!IS_ERR(dst)) {
- rc = mdo_is_subdir(info->mti_env,
- mdt_object_child(dst), fid,
- &dst_fid);
- mdt_object_put(info->mti_env, dst);
- if (rc != -EREMOTE && rc < 0) {
- CERROR("Failed mdo_is_subdir(), rc %d\n", rc);
- } else {
- /* check the found fid */
- if (lu_fid_eq(&dst_fid, fid))
- rc = -EINVAL;
- }
- } else {
- rc = PTR_ERR(dst);
- }
- } while (rc == -EREMOTE);
+ if (!mdt_object_exists(dir))
+ RETURN(-ENOENT);
+
+ rc = mdo_is_subdir(info->mti_env, mdt_object_child(dir),
+ fid, &dir_fid);
+ if (rc < 0) {
+ CERROR("%s: failed subdir check in "DFID" for "DFID
+ ": rc = %d\n", mdt_obd_name(info->mti_mdt),
+ PFID(&dir_fid), PFID(fid), rc);
+ /* Return EINVAL only if a parent is the @fid */
+ if (rc == -EINVAL)
+ rc = -EIO;
+ } else {
+ /* check the found fid */
+ if (lu_fid_eq(&dir_fid, fid))
+ rc = -EINVAL;
+ }
RETURN(rc);
}
GOTO(out, rc);
}
- CFS_INIT_LIST_HEAD(&mll->mll_list);
+ INIT_LIST_HEAD(&mll->mll_list);
mll->mll_obj = mdt_pobj;
list_add_tail(&mll->mll_list, lock_list);
}
CDEBUG(D_INODE, "migrate "DFID"/"DNAME" to "DFID"\n", PFID(rr->rr_fid1),
PNAME(&rr->rr_name), PFID(rr->rr_fid2));
+
/* 1: lock the source dir. */
msrcdir = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
if (IS_ERR(msrcdir)) {
GOTO(out_put_child, rc = -EPERM);
}
+ rc = mdt_remote_permission(info, msrcdir, mold);
+ if (rc != 0)
+ GOTO(out_put_child, rc);
+
/* 3: iterate the linkea of the object and lock all of the objects */
- CFS_INIT_LIST_HEAD(&lock_list);
+ INIT_LIST_HEAD(&lock_list);
rc = mdt_lock_objects_in_linkea(info, mold, msrcdir, &lock_list);
if (rc != 0)
GOTO(out_put_child, rc);
lmv_le_to_cpu(ma->ma_lmv, ma->ma_lmv);
lmm1 = &ma->ma_lmv->lmv_md_v1;
- if (lmm1->lmv_magic != LMV_MAGIC_MIGRATE) {
+ if (!(lmm1->lmv_hash_type & LMV_HASH_FLAG_MIGRATION)) {
CERROR("%s: can not migrate striped dir "DFID
": rc = %d\n", mdt_obd_name(info->mti_mdt),
PFID(mdt_object_fid(mold)), -EPERM);
RETURN(rc);
}
+static struct mdt_object *mdt_object_find_check(struct mdt_thread_info *info,
+ const struct lu_fid *fid,
+ int idx)
+{
+ struct mdt_object *dir;
+ int rc;
+ ENTRY;
+
+ dir = mdt_object_find(info->mti_env, info->mti_mdt, fid);
+ if (IS_ERR(dir))
+ RETURN(dir);
+
+ /* check early, the real version will be saved after locking */
+ rc = mdt_version_get_check(info, dir, idx);
+ if (rc)
+ GOTO(out_put, rc);
+
+ RETURN(dir);
+out_put:
+ mdt_object_put(info->mti_env, dir);
+ return ERR_PTR(rc);
+}
+
+static int mdt_object_lock_save(struct mdt_thread_info *info,
+ struct mdt_object *dir,
+ struct mdt_lock_handle *lh,
+ int idx)
+{
+ int rc;
+
+ /* we lock the target dir if it is local */
+ rc = mdt_object_lock(info, dir, lh, MDS_INODELOCK_UPDATE,
+ MDT_LOCAL_LOCK);
+ if (rc != 0)
+ return rc;
+
+ /* get and save correct version after locking */
+ mdt_version_get_save(info, dir, idx);
+ return 0;
+}
+
+
+static int mdt_rename_parents_lock(struct mdt_thread_info *info,
+ struct mdt_object **srcp,
+ struct mdt_object **tgtp)
+{
+ struct mdt_reint_record *rr = &info->mti_rr;
+ const struct lu_fid *fid_src = rr->rr_fid1;
+ const struct lu_fid *fid_tgt = rr->rr_fid2;
+ struct mdt_lock_handle *lh_src = &info->mti_lh[MDT_LH_PARENT];
+ struct mdt_lock_handle *lh_tgt = &info->mti_lh[MDT_LH_CHILD];
+ struct mdt_object *src;
+ struct mdt_object *tgt;
+ int reverse = 0;
+ int rc;
+ ENTRY;
+
+ /* find both parents. */
+ src = mdt_object_find_check(info, fid_src, 0);
+ if (IS_ERR(src))
+ RETURN(PTR_ERR(src));
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME3, 5);
+
+ if (lu_fid_eq(fid_src, fid_tgt)) {
+ tgt = src;
+ mdt_object_get(info->mti_env, tgt);
+ } else {
+ /* Check if the @src is not a child of the @tgt, otherwise a
+ * reverse locking must take place. */
+ rc = mdt_is_subdir(info, src, fid_tgt);
+ if (rc == -EINVAL)
+ reverse = 1;
+ else if (rc)
+ GOTO(err_src_put, rc);
+
+ tgt = mdt_object_find_check(info, fid_tgt, 1);
+ if (IS_ERR(tgt))
+ GOTO(err_src_put, rc = PTR_ERR(tgt));
+
+ if (unlikely(mdt_object_remote(tgt))) {
+ CDEBUG(D_INFO, "Source dir "DFID" target dir "DFID
+ "on different MDTs\n", PFID(fid_src),
+ PFID(fid_tgt));
+ GOTO(err_tgt_put, rc = -EXDEV);
+ }
+ }
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME4, 5);
+
+ /* lock parents in the proper order. */
+ if (reverse) {
+ rc = mdt_object_lock_save(info, tgt, lh_tgt, 1);
+ if (rc)
+ GOTO(err_tgt_put, rc);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME, 5);
+
+ rc = mdt_object_lock_save(info, src, lh_src, 0);
+ } else {
+ rc = mdt_object_lock_save(info, src, lh_src, 0);
+ if (rc)
+ GOTO(err_tgt_put, rc);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME, 5);
+
+ if (tgt != src)
+ rc = mdt_object_lock_save(info, tgt, lh_tgt, 1);
+ else if (lh_src->mlh_pdo_hash != lh_tgt->mlh_pdo_hash) {
+ rc = mdt_pdir_hash_lock(info, lh_tgt, tgt,
+ MDS_INODELOCK_UPDATE);
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK2, 10);
+ }
+ }
+ if (rc)
+ GOTO(err_unlock, rc);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME4, 5);
+
+ *srcp = src;
+ *tgtp = tgt;
+ RETURN(0);
+
+err_unlock:
+ /* The order does not matter as the handle is checked inside,
+ * as well as not used handle. */
+ mdt_object_unlock(info, src, lh_src, rc);
+ mdt_object_unlock(info, tgt, lh_tgt, rc);
+err_tgt_put:
+ mdt_object_put(info->mti_env, tgt);
+err_src_put:
+ mdt_object_put(info->mti_env, src);
+ RETURN(rc);
+}
+
/*
* VBR: rename versions in reply: 0 - src parent; 1 - tgt parent;
* 2 - src child; 3 - tgt child.
struct mdt_reint_record *rr = &info->mti_rr;
struct md_attr *ma = &info->mti_attr;
struct ptlrpc_request *req = mdt_info_req(info);
- struct mdt_object *msrcdir;
- struct mdt_object *mtgtdir;
+ struct mdt_object *msrcdir = NULL;
+ struct mdt_object *mtgtdir = NULL;
struct mdt_object *mold;
struct mdt_object *mnew = NULL;
struct mdt_lock_handle *lh_srcdirp;
PFID(rr->rr_fid1), PNAME(&rr->rr_name),
PFID(rr->rr_fid2), PNAME(&rr->rr_tgt_name));
- /* step 1: lock the source dir. */
lh_srcdirp = &info->mti_lh[MDT_LH_PARENT];
mdt_lock_pdo_init(lh_srcdirp, LCK_PW, &rr->rr_name);
- msrcdir = mdt_object_find_lock(info, rr->rr_fid1, lh_srcdirp,
- MDS_INODELOCK_UPDATE);
- if (IS_ERR(msrcdir))
- RETURN(PTR_ERR(msrcdir));
-
- rc = mdt_version_get_check_save(info, msrcdir, 0);
- if (rc)
- GOTO(out_unlock_source, rc);
-
- /* step 2: find & lock the target dir. */
lh_tgtdirp = &info->mti_lh[MDT_LH_CHILD];
mdt_lock_pdo_init(lh_tgtdirp, LCK_PW, &rr->rr_tgt_name);
- if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) {
- mdt_object_get(info->mti_env, msrcdir);
- mtgtdir = msrcdir;
- if (lh_tgtdirp->mlh_pdo_hash != lh_srcdirp->mlh_pdo_hash) {
- rc = mdt_pdir_hash_lock(info, lh_tgtdirp, mtgtdir,
- MDS_INODELOCK_UPDATE);
- if (rc != 0)
- GOTO(out_unlock_source, rc);
- OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK2, 10);
- }
- } else {
- mtgtdir = mdt_object_find(info->mti_env, info->mti_mdt,
- rr->rr_fid2);
- if (IS_ERR(mtgtdir))
- GOTO(out_unlock_source, rc = PTR_ERR(mtgtdir));
- /* check early, the real version will be saved after locking */
- rc = mdt_version_get_check(info, mtgtdir, 1);
- if (rc)
- GOTO(out_put_target, rc);
+ /* step 1&2: lock the source and target dirs. */
+ rc = mdt_rename_parents_lock(info, &msrcdir, &mtgtdir);
+ if (rc)
+ RETURN(rc);
- if (unlikely(mdt_object_remote(mtgtdir))) {
- CDEBUG(D_INFO, "Source dir "DFID" target dir "DFID
- "on different MDTs\n", PFID(rr->rr_fid1),
- PFID(rr->rr_fid2));
- GOTO(out_put_target, rc = -EXDEV);
- } else {
- if (likely(mdt_object_exists(mtgtdir))) {
- /* we lock the target dir if it is local */
- rc = mdt_object_lock(info, mtgtdir, lh_tgtdirp,
- MDS_INODELOCK_UPDATE,
- MDT_LOCAL_LOCK);
- if (rc != 0)
- GOTO(out_put_target, rc);
- /* get and save correct version after locking */
- mdt_version_get_save(info, mtgtdir, 1);
- } else {
- GOTO(out_put_target, rc = -ESTALE);
- }
- }
- }
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RENAME2, 5);
/* step 3: find & lock the old object. */
fid_zero(old_fid);
rc = mdt_lookup_version_check(info, msrcdir, &rr->rr_name, old_fid, 2);
if (rc != 0)
- GOTO(out_unlock_target, rc);
+ GOTO(out_unlock_parents, rc);
if (lu_fid_eq(old_fid, rr->rr_fid1) || lu_fid_eq(old_fid, rr->rr_fid2))
- GOTO(out_unlock_target, rc = -EINVAL);
+ GOTO(out_unlock_parents, rc = -EINVAL);
if (!fid_is_md_operative(old_fid))
- GOTO(out_unlock_target, rc = -EPERM);
+ GOTO(out_unlock_parents, rc = -EPERM);
mold = mdt_object_find(info->mti_env, info->mti_mdt, old_fid);
if (IS_ERR(mold))
- GOTO(out_unlock_target, rc = PTR_ERR(mold));
+ GOTO(out_unlock_parents, rc = PTR_ERR(mold));
+
+ /* Check if @mtgtdir is subdir of @mold, before locking child
+ * to avoid reverse locking. */
+ rc = mdt_is_subdir(info, mtgtdir, old_fid);
+ if (rc)
+ GOTO(out_put_old, rc);
tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(mold));
/* save version after locking */
GOTO(out_put_new, rc = -EXDEV);
}
+ /* Before locking the target dir, check we do not replace
+ * a dir with a non-dir, otherwise it may deadlock with
+ * link op which tries to create a link in this dir
+ * back to this non-dir. */
+ if (S_ISDIR(lu_object_attr(&mnew->mot_obj)) &&
+ !S_ISDIR(lu_object_attr(&mold->mot_obj)))
+ GOTO(out_put_new, rc = -EISDIR);
+
lh_oldp = &info->mti_lh[MDT_LH_OLD];
mdt_lock_reg_init(lh_oldp, LCK_EX);
rc = mdt_object_lock(info, mold, lh_oldp, MDS_INODELOCK_LOOKUP |
if (rc != 0)
GOTO(out_put_new, rc);
+ /* Check if @msrcdir is subdir of @mnew, before locking child
+ * to avoid reverse locking. */
+ rc = mdt_is_subdir(info, msrcdir, new_fid);
+ if (rc)
+ GOTO(out_unlock_old, rc);
+
/* We used to acquire MDS_INODELOCK_FULL here but we
* can't do this now because a running HSM restore on
* the rename onto victim will hold the layout
mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
OBD_FAIL_MDS_REINT_RENAME_WRITE);
- /* Check if @dst is subdir of @src. */
- rc = mdt_rename_sanity(info, old_fid);
- if (rc)
- GOTO(out_unlock_new, rc);
-
if (mnew != NULL)
mutex_lock(&mnew->mot_lov_mutex);
}
EXIT;
-out_unlock_new:
if (mnew != NULL)
mdt_object_unlock(info, mnew, lh_newp, rc);
out_unlock_old:
mdt_object_put(info->mti_env, mnew);
out_put_old:
mdt_object_put(info->mti_env, mold);
-out_unlock_target:
- mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc);
-out_put_target:
- mdt_object_put(info->mti_env, mtgtdir);
-out_unlock_source:
+out_unlock_parents:
+ mdt_object_unlock_put(info, mtgtdir, lh_tgtdirp, rc);
mdt_object_unlock_put(info, msrcdir, lh_srcdirp, rc);
return rc;
}
if (info->mti_dlm_req)
ldlm_request_cancel(req, info->mti_dlm_req, 0);
- if (fid_is_obf(rr->rr_fid1) || fid_is_dot_lustre(rr->rr_fid1) ||
- fid_is_obf(rr->rr_fid2) || fid_is_dot_lustre(rr->rr_fid2))
+ if (!fid_is_md_operative(rr->rr_fid1) ||
+ !fid_is_md_operative(rr->rr_fid2))
RETURN(-EPERM);
rc = mdt_rename_lock(info, &rename_lh, rename_lock);
return mdt_reint_rename_or_migrate(info, lhc, MRL_MIGRATE);
}
-typedef int (*mdt_reinter)(struct mdt_thread_info *info,
- struct mdt_lock_handle *lhc);
-
-static mdt_reinter reinters[REINT_MAX] = {
- [REINT_SETATTR] = mdt_reint_setattr,
- [REINT_CREATE] = mdt_reint_create,
- [REINT_LINK] = mdt_reint_link,
- [REINT_UNLINK] = mdt_reint_unlink,
- [REINT_RENAME] = mdt_reint_rename,
- [REINT_OPEN] = mdt_reint_open,
- [REINT_SETXATTR] = mdt_reint_setxattr,
- [REINT_RMENTRY] = mdt_reint_unlink,
- [REINT_MIGRATE] = mdt_reint_migrate,
+struct mdt_reinter {
+ int (*mr_handler)(struct mdt_thread_info *, struct mdt_lock_handle *);
+ enum lprocfs_extra_opc mr_extra_opc;
+};
+
+static const struct mdt_reinter mdt_reinters[] = {
+ [REINT_SETATTR] = {
+ .mr_handler = &mdt_reint_setattr,
+ .mr_extra_opc = MDS_REINT_SETATTR,
+ },
+ [REINT_CREATE] = {
+ .mr_handler = &mdt_reint_create,
+ .mr_extra_opc = MDS_REINT_CREATE,
+ },
+ [REINT_LINK] = {
+ .mr_handler = &mdt_reint_link,
+ .mr_extra_opc = MDS_REINT_LINK,
+ },
+ [REINT_UNLINK] = {
+ .mr_handler = &mdt_reint_unlink,
+ .mr_extra_opc = MDS_REINT_UNLINK,
+ },
+ [REINT_RENAME] = {
+ .mr_handler = &mdt_reint_rename,
+ .mr_extra_opc = MDS_REINT_RENAME,
+ },
+ [REINT_OPEN] = {
+ .mr_handler = &mdt_reint_open,
+ .mr_extra_opc = MDS_REINT_OPEN,
+ },
+ [REINT_SETXATTR] = {
+ .mr_handler = &mdt_reint_setxattr,
+ .mr_extra_opc = MDS_REINT_SETXATTR,
+ },
+ [REINT_RMENTRY] = {
+ .mr_handler = &mdt_reint_unlink,
+ .mr_extra_opc = MDS_REINT_UNLINK,
+ },
+ [REINT_MIGRATE] = {
+ .mr_handler = &mdt_reint_migrate,
+ .mr_extra_opc = MDS_REINT_RENAME,
+ },
};
int mdt_reint_rec(struct mdt_thread_info *info,
- struct mdt_lock_handle *lhc)
+ struct mdt_lock_handle *lhc)
{
- int rc;
- ENTRY;
+ const struct mdt_reinter *mr;
+ int rc;
+ ENTRY;
- rc = reinters[info->mti_rr.rr_opcode](info, lhc);
+ if (!(info->mti_rr.rr_opcode < ARRAY_SIZE(mdt_reinters)))
+ RETURN(-EPROTO);
- RETURN(rc);
+ mr = &mdt_reinters[info->mti_rr.rr_opcode];
+ if (mr->mr_handler == NULL)
+ RETURN(-EPROTO);
+
+ rc = (*mr->mr_handler)(info, lhc);
+
+ lprocfs_counter_incr(ptlrpc_req2svc(mdt_info_req(info))->srv_stats,
+ PTLRPC_LAST_CNTR + mr->mr_extra_opc);
+
+ RETURN(rc);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff