int mdt_attr_set(struct mdt_thread_info *info, struct mdt_object *mo,
struct md_attr *ma, int flags)
{
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;
int rc;
ENTRY;
/* attr shouldn't be set on remote object */
LASSERT(!mdt_object_remote(mo));
lh = &info->mti_lh[MDT_LH_PARENT];
mdt_lock_reg_init(lh, LCK_PW);
/* Even though the new MDT will grant PERM lock to the old
* client, but the old client will almost ignore that during
* So it needs to revoke both LOOKUP and PERM lock here, so
* both new and old client can cancel the dcache */
if (ma->ma_attr.la_valid & (LA_MODE|LA_UID|LA_GID))
lockpart |= MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM;
rc = mdt_object_lock(info, mo, lh, lockpart, MDT_LOCAL_LOCK);
if (rc != 0)
RETURN(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);
/* This is only for set ctime when rename's source is on remote MDS. */
if (unlikely(ma->ma_attr.la_valid == LA_CTIME))
ma->ma_attr_flags |= MDS_VTX_BYPASS;
/* VBR: update version if attr changed are important for recovery */
if (do_vbr) {
/* update on-disk version of changed object */
tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(mo));
rc = mdt_version_get_check_save(info, mo, 0);
if (rc)
GOTO(out_unlock, rc);
}
/* all attrs are packed into mti_attr in unpack_setattr */
rc = mo_attr_set(info->mti_env, mdt_object_child(mo), ma);
if (rc != 0)
GOTO(out_unlock, rc);
EXIT;
out_unlock:
mdt_object_unlock(info, mo, lh, rc);
return rc;
}
/**
* Get version of object by fid.
*
* Return real version or ENOENT_VERSION if object doesn't exist
*/
static void mdt_obj_version_get(struct mdt_thread_info *info,
struct mdt_object *o, __u64 *version)
{
LASSERT(o);
if (mdt_object_exists(o) && !mdt_object_remote(o) &&
!mdt_object_obf(o))
*version = dt_version_get(info->mti_env, mdt_obj2dt(o));
else
*version = ENOENT_VERSION;
CDEBUG(D_INODE, "FID "DFID" version is "LPX64"\n",
PFID(mdt_object_fid(o)), *version);
}
int mdt_reint_setxattr(struct mdt_thread_info *info,
struct mdt_lock_handle *unused)
{
struct ptlrpc_request *req = mdt_info_req(info);
struct lu_ucred *uc = lu_ucred(info->mti_env);
struct mdt_lock_handle *lh;
const struct lu_env *env = info->mti_env;
struct lu_buf *buf = &info->mti_buf;
struct mdt_reint_record *rr = &info->mti_rr;
struct md_attr *ma = &info->mti_attr;
struct lu_attr *attr = &info->mti_attr.ma_attr;
struct mdt_object *obj;
struct md_object *child;
__u64 valid = attr->la_valid;
const char *xattr_name = rr->rr_name.ln_name;
int xattr_len = rr->rr_eadatalen;
__u64 lockpart;
int rc;
posix_acl_xattr_header *new_xattr = NULL;
__u32 remote = exp_connect_rmtclient(info->mti_exp);
__u32 perm;
ENTRY;
CDEBUG(D_INODE, "setxattr for "DFID"\n", PFID(rr->rr_fid1));
if (info->mti_dlm_req)
ldlm_request_cancel(req, info->mti_dlm_req, 0);
if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SETXATTR))
RETURN(err_serious(-ENOMEM));
CDEBUG(D_INODE, "%s xattr %s\n",
valid & OBD_MD_FLXATTR ? "set" : "remove", xattr_name);
rc = mdt_init_ucred_reint(info);
if (rc != 0)
RETURN(rc);
if (valid & OBD_MD_FLRMTRSETFACL) {
if (unlikely(!remote))
GOTO(out, rc = err_serious(-EINVAL));
perm = mdt_identity_get_perm(uc->uc_identity, remote,
req->rq_peer.nid);
if (!(perm & CFS_RMTACL_PERM))
GOTO(out, rc = err_serious(-EPERM));
}
if (strncmp(xattr_name, XATTR_USER_PREFIX,
sizeof(XATTR_USER_PREFIX) - 1) == 0) {
if (!(exp_connect_flags(req->rq_export) & OBD_CONNECT_XATTR))
GOTO(out, rc = -EOPNOTSUPP);
} else if (strncmp(xattr_name, XATTR_TRUSTED_PREFIX,
sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0) {
if (!md_capable(mdt_ucred(info), CFS_CAP_SYS_ADMIN))
GOTO(out, rc = -EPERM);
if (strcmp(xattr_name, XATTR_NAME_LOV) == 0 ||
strcmp(xattr_name, XATTR_NAME_LMA) == 0 ||
strcmp(xattr_name, XATTR_NAME_LMV) == 0 ||
strcmp(xattr_name, XATTR_NAME_LINK) == 0 ||
strcmp(xattr_name, XATTR_NAME_FID) == 0 ||
strcmp(xattr_name, XATTR_NAME_VERSION) == 0 ||
strcmp(xattr_name, XATTR_NAME_SOM) == 0 ||
strcmp(xattr_name, XATTR_NAME_HSM) == 0 ||
strcmp(xattr_name, XATTR_NAME_LFSCK_NAMESPACE) == 0)
GOTO(out, rc = 0);
} else if ((valid & OBD_MD_FLXATTR) &&
(strcmp(xattr_name, XATTR_NAME_ACL_ACCESS) == 0 ||
strcmp(xattr_name, XATTR_NAME_ACL_DEFAULT) == 0)) {
/* currently lustre limit acl access size */
if (xattr_len > LUSTRE_POSIX_ACL_MAX_SIZE)
GOTO(out, rc = -ERANGE);
}
lockpart = MDS_INODELOCK_UPDATE;
/* Revoke all clients' lookup lock, since the access
* permissions for this inode is changed when ACL_ACCESS is
* set. This isn't needed for ACL_DEFAULT, since that does
* not change the access permissions of this inode, nor any
* other existing inodes. It is setting the ACLs inherited
* by new directories/files at create time. */
/* We need revoke both LOOKUP|PERM lock here, see mdt_attr_set. */
if (!strcmp(xattr_name, XATTR_NAME_ACL_ACCESS))
lockpart |= MDS_INODELOCK_PERM | MDS_INODELOCK_LOOKUP;
/* We need to take the lock on behalf of old clients so that newer
* clients flush their xattr caches */
else
lockpart |= MDS_INODELOCK_XATTR;
lh = &info->mti_lh[MDT_LH_PARENT];
/* ACLs were sent to clients under LCK_CR locks, so taking LCK_EX
* to cancel them. */
mdt_lock_reg_init(lh, LCK_EX);
obj = mdt_object_find_lock(info, rr->rr_fid1, lh, lockpart);
if (IS_ERR(obj))
GOTO(out, rc = PTR_ERR(obj));
tgt_vbr_obj_set(env, mdt_obj2dt(obj));
rc = mdt_version_get_check_save(info, obj, 0);
if (rc)
GOTO(out_unlock, rc);
if (unlikely(!(valid & OBD_MD_FLCTIME))) {
/* This isn't strictly an error, but all current clients
* should set OBD_MD_FLCTIME when setting attributes. */
CWARN("%s: client miss to set OBD_MD_FLCTIME when "
"setxattr %s: [object "DFID"] [valid "LPU64"]\n",
mdt_obd_name(info->mti_mdt), xattr_name,
PFID(rr->rr_fid1), valid);
attr->la_ctime = cfs_time_current_sec();
}
attr->la_valid = LA_CTIME;
child = mdt_object_child(obj);
if (valid & OBD_MD_FLXATTR) {
char *xattr = (void *)rr->rr_eadata;
if (xattr_len > 0) {
int flags = 0;
if (valid & OBD_MD_FLRMTLSETFACL) {
if (unlikely(!remote))
GOTO(out_unlock, rc = -EINVAL);
xattr_len = mdt_rmtlsetfacl(info, child,
xattr_name,
(ext_acl_xattr_header *)xattr,
&new_xattr);
if (xattr_len < 0)
GOTO(out_unlock, rc = xattr_len);
xattr = (char *)new_xattr;
}
if (attr->la_flags & XATTR_REPLACE)
flags |= LU_XATTR_REPLACE;
if (attr->la_flags & XATTR_CREATE)
flags |= LU_XATTR_CREATE;
mdt_fail_write(env, info->mti_mdt->mdt_bottom,
OBD_FAIL_MDS_SETXATTR_WRITE);
buf->lb_buf = xattr;
buf->lb_len = xattr_len;
rc = mo_xattr_set(env, child, buf, xattr_name, flags);
/* update ctime after xattr changed */
if (rc == 0) {
ma->ma_attr_flags |= MDS_PERM_BYPASS;
mo_attr_set(env, child, ma);
}
}
} else if (valid & OBD_MD_FLXATTRRM) {
rc = mo_xattr_del(env, child, xattr_name);
/* update ctime after xattr changed */
if (rc == 0) {
ma->ma_attr_flags |= MDS_PERM_BYPASS;
mo_attr_set(env, child, ma);
}
} else {
CDEBUG(D_INFO, "valid bits: "LPX64"\n", valid);
rc = -EINVAL;
}
if (rc == 0)
mdt_counter_incr(req, LPROC_MDT_SETXATTR);
EXIT;
out_unlock:
mdt_object_unlock_put(info, obj, lh, rc);
if (unlikely(new_xattr != NULL))
lustre_posix_acl_xattr_free(new_xattr, xattr_len);
out:
mdt_exit_ucred(info);
return rc;
}
int mdt_reint_setxattr(struct mdt_thread_info *info,
struct mdt_lock_handle *unused)
{
struct ptlrpc_request *req = mdt_info_req(info);
struct mdt_lock_handle *lh;
const struct lu_env *env = info->mti_env;
struct lu_buf *buf = &info->mti_buf;
struct mdt_reint_record *rr = &info->mti_rr;
struct md_attr *ma = &info->mti_attr;
struct lu_attr *attr = &info->mti_attr.ma_attr;
struct mdt_object *obj;
struct md_object *child;
__u64 valid = attr->la_valid;
const char *xattr_name = rr->rr_name.ln_name;
int xattr_len = rr->rr_eadatalen;
__u64 lockpart = MDS_INODELOCK_UPDATE;
int rc;
ENTRY;
CDEBUG(D_INODE, "setxattr for "DFID": %s %s\n", PFID(rr->rr_fid1),
valid & OBD_MD_FLXATTR ? "set" : "remove", xattr_name);
if (info->mti_dlm_req)
ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP);
if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SETXATTR))
RETURN(err_serious(-ENOMEM));
rc = mdt_init_ucred_reint(info);
if (rc != 0)
RETURN(rc);
if (strncmp(xattr_name, XATTR_USER_PREFIX,
sizeof(XATTR_USER_PREFIX) - 1) == 0) {
if (!(exp_connect_flags(req->rq_export) & OBD_CONNECT_XATTR))
GOTO(out, rc = -EOPNOTSUPP);
} else if (strncmp(xattr_name, XATTR_TRUSTED_PREFIX,
sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0) {
/* setxattr(LMV) with lum is used to shrink dir layout */
if (strcmp(xattr_name, XATTR_NAME_LMV) == 0) {
__u32 *magic = rr->rr_eadata;
/* we don't let to remove LMV? */
if (!rr->rr_eadata)
GOTO(out, rc = 0);
if (le32_to_cpu(*magic) == LMV_USER_MAGIC ||
le32_to_cpu(*magic) == LMV_USER_MAGIC_SPECIFIC) {
rc = mdt_dir_layout_shrink(info);
GOTO(out, rc);
}
}
if (!md_capable(mdt_ucred(info), CFS_CAP_SYS_ADMIN))
GOTO(out, rc = -EPERM);
if (strcmp(xattr_name, XATTR_NAME_LOV) == 0 ||
strcmp(xattr_name, XATTR_NAME_LMA) == 0 ||
strcmp(xattr_name, XATTR_NAME_LMV) == 0 ||
strcmp(xattr_name, XATTR_NAME_LINK) == 0 ||
strcmp(xattr_name, XATTR_NAME_FID) == 0 ||
strcmp(xattr_name, XATTR_NAME_VERSION) == 0 ||
strcmp(xattr_name, XATTR_NAME_SOM) == 0 ||
strcmp(xattr_name, XATTR_NAME_HSM) == 0 ||
strcmp(xattr_name, XATTR_NAME_LFSCK_NAMESPACE) == 0)
GOTO(out, rc = 0);
} else if ((valid & OBD_MD_FLXATTR) &&
(strcmp(xattr_name, XATTR_NAME_ACL_ACCESS) == 0 ||
strcmp(xattr_name, XATTR_NAME_ACL_DEFAULT) == 0)) {
rc = mdt_nodemap_map_acl(info, rr->rr_eadata, xattr_len,
xattr_name, NODEMAP_CLIENT_TO_FS);
if (rc < 0)
GOTO(out, rc);
/* ACLs were mapped out, return an error so the user knows */
if (rc != xattr_len)
GOTO(out, rc = -EPERM);
} else if ((strlen(xattr_name) > strlen(XATTR_LUSTRE_LOV) + 1) &&
strncmp(xattr_name, XATTR_LUSTRE_LOV,
strlen(XATTR_LUSTRE_LOV)) == 0) {
if (strncmp(xattr_name, XATTR_LUSTRE_LOV".add",
strlen(XATTR_LUSTRE_LOV".add")) &&
strncmp(xattr_name, XATTR_LUSTRE_LOV".set",
strlen(XATTR_LUSTRE_LOV".set")) &&
strncmp(xattr_name, XATTR_LUSTRE_LOV".del",
strlen(XATTR_LUSTRE_LOV".del"))) {
CERROR("%s: invalid xattr name: %s\n",
mdt_obd_name(info->mti_mdt), xattr_name);
GOTO(out, rc = -EINVAL);
}
lockpart |= MDS_INODELOCK_LAYOUT;
}
/* Revoke all clients' lookup lock, since the access
* permissions for this inode is changed when ACL_ACCESS is
* set. This isn't needed for ACL_DEFAULT, since that does
* not change the access permissions of this inode, nor any
* other existing inodes. It is setting the ACLs inherited
* by new directories/files at create time. */
/* We need revoke both LOOKUP|PERM lock here, see mdt_attr_set. */
if (!strcmp(xattr_name, XATTR_NAME_ACL_ACCESS))
lockpart |= MDS_INODELOCK_PERM | MDS_INODELOCK_LOOKUP;
/* We need to take the lock on behalf of old clients so that newer
* clients flush their xattr caches */
else
lockpart |= MDS_INODELOCK_XATTR;
lh = &info->mti_lh[MDT_LH_PARENT];
/* ACLs were sent to clients under LCK_CR locks, so taking LCK_EX
* to cancel them. */
mdt_lock_reg_init(lh, LCK_EX);
obj = mdt_object_find_lock(info, rr->rr_fid1, lh, lockpart);
if (IS_ERR(obj))
GOTO(out, rc = PTR_ERR(obj));
tgt_vbr_obj_set(env, mdt_obj2dt(obj));
rc = mdt_version_get_check_save(info, obj, 0);
if (rc)
GOTO(out_unlock, rc);
if (unlikely(!(valid & OBD_MD_FLCTIME))) {
/* This isn't strictly an error, but all current clients
* should set OBD_MD_FLCTIME when setting attributes. */
CWARN("%s: client miss to set OBD_MD_FLCTIME when "
"setxattr %s: [object "DFID"] [valid %llu]\n",
mdt_obd_name(info->mti_mdt), xattr_name,
PFID(rr->rr_fid1), valid);
attr->la_ctime = ktime_get_real_seconds();
}
attr->la_valid = LA_CTIME;
child = mdt_object_child(obj);
if (valid & OBD_MD_FLXATTR) {
int flags = 0;
if (attr->la_flags & XATTR_REPLACE)
flags |= LU_XATTR_REPLACE;
if (attr->la_flags & XATTR_CREATE)
flags |= LU_XATTR_CREATE;
mdt_fail_write(env, info->mti_mdt->mdt_bottom,
OBD_FAIL_MDS_SETXATTR_WRITE);
buf->lb_buf = rr->rr_eadata;
buf->lb_len = xattr_len;
rc = mo_xattr_set(env, child, buf, xattr_name, flags);
/* update ctime after xattr changed */
if (rc == 0) {
ma->ma_attr_flags |= MDS_PERM_BYPASS;
mo_attr_set(env, child, ma);
}
} else if (valid & OBD_MD_FLXATTRRM) {
rc = mo_xattr_del(env, child, xattr_name);
/* update ctime after xattr changed */
if (rc == 0) {
ma->ma_attr_flags |= MDS_PERM_BYPASS;
mo_attr_set(env, child, ma);
}
} else {
CDEBUG(D_INFO, "valid bits: %#llx\n", valid);
rc = -EINVAL;
}
if (rc == 0)
mdt_counter_incr(req, LPROC_MDT_SETXATTR);
EXIT;
out_unlock:
mdt_object_unlock_put(info, obj, lh, rc);
out:
mdt_exit_ucred(info);
return rc;
}
/*
* VBR: save versions in reply: 0 - parent; 1 - child by fid; 2 - target by
* name.
*/
static int mdt_reint_link(struct mdt_thread_info *info,
struct mdt_lock_handle *lhc)
{
struct mdt_reint_record *rr = &info->mti_rr;
struct ptlrpc_request *req = mdt_info_req(info);
struct md_attr *ma = &info->mti_attr;
struct mdt_object *ms;
struct mdt_object *mp;
struct mdt_lock_handle *lhs;
struct mdt_lock_handle *lhp;
struct lu_name *lname;
int rc;
ENTRY;
DEBUG_REQ(D_INODE, req, "link "DFID" to "DFID"/%s",
PFID(rr->rr_fid1), PFID(rr->rr_fid2), rr->rr_name);
if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
RETURN(err_serious(-ENOENT));
if (info->mti_dlm_req)
ldlm_request_cancel(req, info->mti_dlm_req, 0);
/* Invalid case so return error immediately instead of
* processing it */
if (lu_fid_eq(rr->rr_fid1, rr->rr_fid2))
RETURN(-EPERM);
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))
RETURN(-EPERM);
/* step 1: find & lock the target parent dir */
lhp = &info->mti_lh[MDT_LH_PARENT];
mdt_lock_pdo_init(lhp, LCK_PW, rr->rr_name,
rr->rr_namelen);
mp = mdt_object_find_lock(info, rr->rr_fid2, lhp,
MDS_INODELOCK_UPDATE);
if (IS_ERR(mp))
RETURN(PTR_ERR(mp));
rc = mdt_version_get_check_save(info, mp, 0);
if (rc)
GOTO(out_unlock_parent, rc);
/* step 2: find & lock the source */
lhs = &info->mti_lh[MDT_LH_CHILD];
mdt_lock_reg_init(lhs, LCK_EX);
ms = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid1);
if (IS_ERR(ms))
GOTO(out_unlock_parent, rc = PTR_ERR(ms));
if (mdt_object_remote(ms)) {
mdt_object_put(info->mti_env, ms);
CERROR("%s: source inode "DFID" on remote MDT from "DFID"\n",
mdt_obd_name(info->mti_mdt), PFID(rr->rr_fid1),
PFID(rr->rr_fid2));
GOTO(out_unlock_parent, rc = -EXDEV);
}
rc = mdt_object_lock(info, ms, lhs, MDS_INODELOCK_UPDATE |
MDS_INODELOCK_XATTR, MDT_CROSS_LOCK);
if (rc != 0) {
mdt_object_put(info->mti_env, ms);
GOTO(out_unlock_parent, rc);
}
/* step 3: link it */
mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
OBD_FAIL_MDS_REINT_LINK_WRITE);
tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(ms));
rc = mdt_version_get_check_save(info, ms, 1);
if (rc)
GOTO(out_unlock_child, rc);
lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
/** check target version by name during replay */
rc = mdt_lookup_version_check(info, mp, lname, &info->mti_tmp_fid1, 2);
if (rc != 0 && rc != -ENOENT)
GOTO(out_unlock_child, rc);
/* save version of file name for replay, it must be ENOENT here */
if (!req_is_replay(mdt_info_req(info))) {
if (rc != -ENOENT) {
CDEBUG(D_INFO, "link target %.*s existed!\n",
rr->rr_namelen, (char *)rr->rr_name);
GOTO(out_unlock_child, rc = -EEXIST);
}
info->mti_ver[2] = ENOENT_VERSION;
mdt_version_save(mdt_info_req(info), info->mti_ver[2], 2);
}
rc = mdo_link(info->mti_env, mdt_object_child(mp),
mdt_object_child(ms), lname, ma);
if (rc == 0)
mdt_counter_incr(req, LPROC_MDT_LINK);
EXIT;
out_unlock_child:
mdt_object_unlock_put(info, ms, lhs, rc);
out_unlock_parent:
mdt_object_unlock_put(info, mp, lhp, rc);
return rc;
}
/*
* VBR: we save three versions in reply:
* 0 - parent. Check that parent version is the same during replay.
* 1 - name. Version of 'name' if file exists with the same name or
* ENOENT_VERSION, it is needed because file may appear due to missed replays.
* 2 - child. Version of child by FID. Must be ENOENT. It is mostly sanity
* check.
*/
static int mdt_md_create(struct mdt_thread_info *info)
{
struct mdt_device *mdt = info->mti_mdt;
struct mdt_object *parent;
struct mdt_object *child;
struct mdt_lock_handle *lh;
struct mdt_body *repbody;
struct md_attr *ma = &info->mti_attr;
struct mdt_reint_record *rr = &info->mti_rr;
struct lu_name *lname;
int rc;
ENTRY;
DEBUG_REQ(D_INODE, mdt_info_req(info), "Create (%s->"DFID") in "DFID,
rr->rr_name, PFID(rr->rr_fid2), PFID(rr->rr_fid1));
if (fid_is_obf(rr->rr_fid1) || fid_is_dot_lustre(rr->rr_fid1))
RETURN(-EPERM);
repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
lh = &info->mti_lh[MDT_LH_PARENT];
mdt_lock_pdo_init(lh, LCK_PW, rr->rr_name, rr->rr_namelen);
parent = mdt_object_find_lock(info, rr->rr_fid1, lh,
MDS_INODELOCK_UPDATE);
if (IS_ERR(parent))
RETURN(PTR_ERR(parent));
rc = mdt_version_get_check_save(info, parent, 0);
if (rc)
GOTO(out_put_parent, rc);
/*
* Check child name version during replay.
* During create replay a file may exist with same name.
*/
lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
rc = mdt_lookup_version_check(info, parent, lname,
&info->mti_tmp_fid1, 1);
if (rc == 0)
GOTO(out_put_parent, rc = -EEXIST);
/* -ENOENT is expected here */
if (rc != -ENOENT)
GOTO(out_put_parent, rc);
/* save version of file name for replay, it must be ENOENT here */
mdt_enoent_version_save(info, 1);
child = mdt_object_new(info->mti_env, mdt, rr->rr_fid2);
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);
}
}
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,
&RMF_CAPA1);
LASSERT(ma->ma_capa);
mdt_fail_write(info->mti_env, info->mti_mdt->mdt_bottom,
OBD_FAIL_MDS_REINT_CREATE_WRITE);
/* Version of child will be updated on disk. */
tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(child));
rc = mdt_version_get_check_save(info, child, 2);
if (rc)
GOTO(out_put_child, rc);
/* Let lower layer know current lock mode. */
info->mti_spec.sp_cr_mode =
mdt_dlm_mode2mdl_mode(lh->mlh_pdo_mode);
/*
* Do not perform lookup sanity check. We know that name does
* not exist.
*/
info->mti_spec.sp_cr_lookup = 0;
info->mti_spec.sp_feat = &dt_directory_features;
rc = mdo_create(info->mti_env, next, lname,
mdt_object_child(child),
&info->mti_spec, ma);
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));
}
out_put_child:
mdt_object_put(info->mti_env, child);
} else {
rc = PTR_ERR(child);
}
mdt_create_pack_capa(info, rc, child, repbody);
out_put_parent:
mdt_object_unlock_put(info, parent, lh, rc);
RETURN(rc);
}
/**
* For DNE phase I, only these renames are allowed
* mv src_p/src_c tgt_p/tgt_c
* 1. src_p/src_c/tgt_p/tgt_c are in the same MDT.
* 2. src_p and tgt_p are same directory, and tgt_c does not
* exists. In this case, all of modification will happen
* in the MDT where ithesource parent is, only one remote
* update is needed, i.e. set c_time/m_time on the child.
* And tgt_c will be still in the same MDT as the original
* src_c.
*/
static int mdt_reint_rename(struct mdt_thread_info *info,
struct mdt_lock_handle *lhc)
{
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 *mold;
struct mdt_object *mnew = NULL;
struct mdt_lock_handle *lh_srcdirp;
struct mdt_lock_handle *lh_tgtdirp;
struct mdt_lock_handle *lh_oldp;
struct mdt_lock_handle *lh_newp;
struct lu_fid *old_fid = &info->mti_tmp_fid1;
struct lu_fid *new_fid = &info->mti_tmp_fid2;
struct lustre_handle rename_lh = { 0 };
struct lu_name slname = { 0 };
struct lu_name *lname;
int rc;
ENTRY;
if (info->mti_dlm_req)
ldlm_request_cancel(req, info->mti_dlm_req, 0);
DEBUG_REQ(D_INODE, req, "rename "DFID"/%s to "DFID"/%s",
PFID(rr->rr_fid1), rr->rr_name,
PFID(rr->rr_fid2), rr->rr_tgt);
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))
RETURN(-EPERM);
rc = mdt_rename_lock(info, &rename_lh);
if (rc) {
CERROR("Can't lock FS for rename, rc %d\n", rc);
RETURN(rc);
}
lh_newp = &info->mti_lh[MDT_LH_NEW];
/* 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,
rr->rr_namelen);
msrcdir = mdt_object_find_lock(info, rr->rr_fid1, lh_srcdirp,
MDS_INODELOCK_UPDATE);
if (IS_ERR(msrcdir))
GOTO(out_rename_lock, rc = 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,
rr->rr_tgtlen);
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)
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);
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);
}
}
}
/* step 3: find & lock the old object. */
lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
mdt_name_copy(&slname, lname);
fid_zero(old_fid);
rc = mdt_lookup_version_check(info, msrcdir, &slname, old_fid, 2);
if (rc != 0)
GOTO(out_unlock_target, rc);
if (lu_fid_eq(old_fid, rr->rr_fid1) || lu_fid_eq(old_fid, rr->rr_fid2))
GOTO(out_unlock_target, rc = -EINVAL);
if (fid_is_obf(old_fid) || fid_is_dot_lustre(old_fid))
GOTO(out_unlock_target, 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));
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 |
MDS_INODELOCK_XATTR, MDT_CROSS_LOCK);
if (rc != 0) {
mdt_object_put(info->mti_env, mold);
GOTO(out_unlock_target, rc);
}
tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(mold));
/* save version after locking */
mdt_version_get_save(info, mold, 2);
mdt_set_capainfo(info, 2, old_fid, BYPASS_CAPA);
/* step 4: find & lock the new object. */
/* new target object may not exist now */
lname = mdt_name(info->mti_env, (char *)rr->rr_tgt, rr->rr_tgtlen);
/* lookup with version checking */
fid_zero(new_fid);
rc = mdt_lookup_version_check(info, mtgtdir, lname, new_fid, 3);
if (rc == 0) {
/* the new_fid should have been filled at this moment */
if (lu_fid_eq(old_fid, new_fid))
GOTO(out_unlock_old, rc);
if (lu_fid_eq(new_fid, rr->rr_fid1) ||
lu_fid_eq(new_fid, rr->rr_fid2))
GOTO(out_unlock_old, rc = -EINVAL);
if (fid_is_obf(new_fid) || fid_is_dot_lustre(new_fid))
GOTO(out_unlock_old, rc = -EPERM);
if (mdt_object_remote(mold)) {
CDEBUG(D_INFO, "Src child "DFID" is on another MDT\n",
PFID(old_fid));
GOTO(out_unlock_old, rc = -EXDEV);
}
mdt_lock_reg_init(lh_newp, LCK_EX);
mnew = mdt_object_find(info->mti_env, info->mti_mdt, new_fid);
if (IS_ERR(mnew))
GOTO(out_unlock_old, rc = PTR_ERR(mnew));
if (mdt_object_remote(mnew)) {
mdt_object_put(info->mti_env, mnew);
CDEBUG(D_INFO, "src child "DFID" is on another MDT\n",
PFID(new_fid));
GOTO(out_unlock_old, rc = -EXDEV);
}
/* 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
* lock. See LU-4002. */
rc = mdt_object_lock(info, mnew, lh_newp,
MDS_INODELOCK_LOOKUP |
MDS_INODELOCK_UPDATE,
MDT_CROSS_LOCK);
if (rc != 0) {
mdt_object_put(info->mti_env, mnew);
GOTO(out_unlock_old, rc);
}
/* get and save version after locking */
mdt_version_get_save(info, mnew, 3);
mdt_set_capainfo(info, 3, new_fid, BYPASS_CAPA);
} else if (rc != -EREMOTE && rc != -ENOENT) {
GOTO(out_unlock_old, rc);
} else {
/* If mnew does not exist and mold are remote directory,
* it only allows rename if they are under same directory */
if (mtgtdir != msrcdir && mdt_object_remote(mold)) {
CDEBUG(D_INFO, "Src child "DFID" is on another MDT\n",
PFID(old_fid));
GOTO(out_unlock_old, rc = -EXDEV);
}
mdt_enoent_version_save(info, 3);
}
/* step 5: rename it */
mdt_reint_init_ma(info, ma);
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);
rc = mdo_rename(info->mti_env, mdt_object_child(msrcdir),
mdt_object_child(mtgtdir), old_fid, &slname,
(mnew ? mdt_object_child(mnew) : NULL),
lname, ma);
if (mnew != NULL)
mutex_unlock(&mnew->mot_lov_mutex);
/* handle last link of tgt object */
if (rc == 0) {
mdt_counter_incr(req, LPROC_MDT_RENAME);
if (mnew)
mdt_handle_last_unlink(info, mnew, ma);
mdt_rename_counter_tally(info, info->mti_mdt, req,
msrcdir, mtgtdir);
}
EXIT;
out_unlock_new:
if (mnew)
mdt_object_unlock_put(info, mnew, lh_newp, rc);
out_unlock_old:
mdt_object_unlock_put(info, mold, lh_oldp, rc);
out_unlock_target:
mdt_object_unlock(info, mtgtdir, lh_tgtdirp, rc);
out_put_target:
mdt_object_put(info->mti_env, mtgtdir);
out_unlock_source:
mdt_object_unlock_put(info, msrcdir, lh_srcdirp, rc);
out_rename_lock:
if (lustre_handle_is_used(&rename_lh))
mdt_rename_unlock(&rename_lh);
return rc;
}