mds_reint.c 115.15 KiB
/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
* linux/mds/mds_reint.c
* Lustre Metadata Server (mds) reintegration routines
*
* Copyright (C) 2002, 2003 Cluster File Systems, Inc.
* Author: Peter Braam <braam@clusterfs.com>
* Author: Andreas Dilger <adilger@clusterfs.com>
* Author: Phil Schwan <phil@clusterfs.com>
*
* This file is part of Lustre, http://www.lustre.org.
*
* Lustre is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* Lustre is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Lustre; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef EXPORT_SYMTAB
# define EXPORT_SYMTAB
#endif
#define DEBUG_SUBSYSTEM S_MDS
#include <linux/fs.h>
#include <linux/obd_support.h>
#include <linux/obd_class.h>
#include <linux/obd.h>
#include <linux/lustre_lib.h>
#include <linux/lustre_idl.h>
#include <linux/lustre_mds.h>
#include <linux/lustre_dlm.h>
#include <linux/lustre_log.h>
#include <linux/lustre_fsfilt.h>
#include "mds_internal.h"
void mds_commit_cb(struct obd_device *obd, __u64 transno, void *data,
int error)
{
obd_transno_commit_cb(obd, transno, error);
}
struct mds_logcancel_data {
struct lov_mds_md *mlcd_lmm;
int mlcd_size;
int mlcd_cookielen;
int mlcd_eadatalen;
struct llog_cookie mlcd_cookies[0];
};
static void mds_cancel_cookies_cb(struct obd_device *obd, __u64 transno,
void *cb_data, int error)
{
struct mds_logcancel_data *mlcd = cb_data;
struct lov_stripe_md *lsm = NULL;
struct llog_ctxt *ctxt;
int rc;
obd_transno_commit_cb(obd, transno, error);
CDEBUG(D_HA, "cancelling %d cookies\n",
(int)(mlcd->mlcd_cookielen / sizeof(*mlcd->mlcd_cookies)));
rc = obd_unpackmd(obd->u.mds.mds_osc_exp, &lsm, mlcd->mlcd_lmm,
mlcd->mlcd_eadatalen);
if (rc < 0) {
CERROR("bad LSM cancelling %d log cookies: rc %d\n",
(int)(mlcd->mlcd_cookielen/sizeof(*mlcd->mlcd_cookies)),
rc);
} else {
///* XXX 0 normally, SENDNOW for debug */);
ctxt = llog_get_context(&obd->obd_llogs,
mlcd->mlcd_cookies[0].lgc_subsys + 1);
rc = llog_cancel(ctxt, mlcd->mlcd_cookielen /
sizeof(*mlcd->mlcd_cookies),
mlcd->mlcd_cookies, OBD_LLOG_FL_SENDNOW, lsm);
if (rc)
CERROR("error cancelling %d log cookies: rc %d\n",
(int)(mlcd->mlcd_cookielen /
sizeof(*mlcd->mlcd_cookies)), rc);
}
OBD_FREE(mlcd, mlcd->mlcd_size);
}
/* Assumes caller has already pushed us into the kernel context. */
int mds_finish_transno(struct mds_obd *mds, struct inode *inode, void *handle,
struct ptlrpc_request *req, int rc, __u32 op_data)
{
struct mds_export_data *med = &req->rq_export->exp_mds_data;
struct mds_client_data *mcd = med->med_mcd;
struct obd_device *obd = req->rq_export->exp_obd;
int err;
__u64 transno;
loff_t off;
int log_pri = D_HA;
ENTRY;
/* if the export has already been failed, we have no last_rcvd slot */
if (req->rq_export->exp_failed) {
CERROR("committing transaction for disconnected client\n");
if (handle)
GOTO(commit, rc);
RETURN(rc);
}
if (IS_ERR(handle))
RETURN(rc);
if (handle == NULL) {
/* if we're starting our own xaction, use our own inode */
inode = mds->mds_rcvd_filp->f_dentry->d_inode;
handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
if (IS_ERR(handle)) {
CERROR("fsfilt_start: %ld\n", PTR_ERR(handle));
RETURN(PTR_ERR(handle));
}
}
off = med->med_off;
transno = req->rq_reqmsg->transno;
if (rc != 0) {
LASSERTF(transno == 0, "BUG 3934, t"LPU64" rc %d\n", transno, rc);
} else if (transno == 0) {
spin_lock(&mds->mds_transno_lock);
transno = ++mds->mds_last_transno;
spin_unlock(&mds->mds_transno_lock);
} else {
spin_lock(&mds->mds_transno_lock); if (transno > mds->mds_last_transno)
mds->mds_last_transno = transno;
spin_unlock(&mds->mds_transno_lock);
}
req->rq_repmsg->transno = req->rq_transno = transno;
mcd->mcd_last_transno = cpu_to_le64(transno);
mcd->mcd_last_xid = cpu_to_le64(req->rq_xid);
mcd->mcd_last_result = cpu_to_le32(rc);
mcd->mcd_last_data = cpu_to_le32(op_data);
fsfilt_add_journal_cb(req->rq_export->exp_obd, mds->mds_sb,
transno, handle, mds_commit_cb, NULL);
err = fsfilt_write_record(obd, mds->mds_rcvd_filp, mcd, sizeof(*mcd),
&off, 0);
if (err) {
log_pri = D_ERROR;
if (rc == 0)
rc = err;
}
DEBUG_REQ(log_pri, req,
"wrote trans #"LPU64" client %s at idx %u: err = %d",
transno, mcd->mcd_uuid, med->med_idx, err);
err = mds_lov_write_objids(obd);
if (err) {
log_pri = D_ERROR;
if (rc == 0)
rc = err;
}
CDEBUG(log_pri, "wrote objids: err = %d\n", err);
commit:
err = fsfilt_commit(obd, mds->mds_sb, inode, handle, 0);
if (err) {
CERROR("error committing transaction: %d\n", err);
if (!rc)
rc = err;
}
RETURN(rc);
}
/* this gives the same functionality as the code between
* sys_chmod and inode_setattr
* chown_common and inode_setattr
* utimes and inode_setattr
*/
int mds_fix_attr(struct inode *inode, struct mds_update_record *rec)
{
time_t now = LTIME_S(CURRENT_TIME);
struct iattr *attr = &rec->ur_iattr;
unsigned int ia_valid = attr->ia_valid;
int error;
ENTRY;
/* only fix up attrs if the client VFS didn't already */
if (!(ia_valid & ATTR_RAW))
RETURN(0);
if (!(ia_valid & ATTR_CTIME_SET))
LTIME_S(attr->ia_ctime) = now;
if (!(ia_valid & ATTR_ATIME_SET))
LTIME_S(attr->ia_atime) = now;
if (!(ia_valid & ATTR_MTIME_SET))
LTIME_S(attr->ia_mtime) = now;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
RETURN(-EPERM);
/* times */
if ((ia_valid & (ATTR_MTIME|ATTR_ATIME)) == (ATTR_MTIME|ATTR_ATIME)) {
if (rec->_ur_fsuid != inode->i_uid &&
(error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
RETURN(error);
}
if (ia_valid & ATTR_SIZE) {
if ((error = ll_permission(inode, MAY_WRITE, NULL)) != 0)
RETURN(error);
}
if (ia_valid & ATTR_UID) {
/* chown */
error = -EPERM;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
RETURN(-EPERM);
if (attr->ia_uid == (uid_t) -1)
attr->ia_uid = inode->i_uid;
if (attr->ia_gid == (gid_t) -1)
attr->ia_gid = inode->i_gid;
attr->ia_mode = inode->i_mode;
/*
* If the user or group of a non-directory has been
* changed by a non-root user, remove the setuid bit.
* 19981026 David C Niemi <niemi@tux.org>
*
* Changed this to apply to all users, including root,
* to avoid some races. This is the behavior we had in
* 2.0. The check for non-root was definitely wrong
* for 2.2 anyway, as it should have been using
* CAP_FSETID rather than fsuid -- 19990830 SD.
*/
if ((inode->i_mode & S_ISUID) == S_ISUID &&
!S_ISDIR(inode->i_mode)) {
attr->ia_mode &= ~S_ISUID;
attr->ia_valid |= ATTR_MODE;
}
/*
* Likewise, if the user or group of a non-directory
* has been changed by a non-root user, remove the
* setgid bit UNLESS there is no group execute bit
* (this would be a file marked for mandatory
* locking). 19981026 David C Niemi <niemi@tux.org>
*
* Removed the fsuid check (see the comment above) --
* 19990830 SD.
*/
if (((inode->i_mode & (S_ISGID | S_IXGRP)) ==
(S_ISGID | S_IXGRP)) && !S_ISDIR(inode->i_mode)) {
attr->ia_mode &= ~S_ISGID;
attr->ia_valid |= ATTR_MODE;
}
} else if (ia_valid & ATTR_MODE) {
int mode = attr->ia_mode;
/* chmod */
if (attr->ia_mode == (mode_t) -1)
attr->ia_mode = inode->i_mode;
attr->ia_mode =
(mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
}
RETURN(0);
}
void mds_steal_ack_locks(struct ptlrpc_request *req)
{
struct obd_export *exp = req->rq_export; struct list_head *tmp;
struct ptlrpc_reply_state *oldrep;
struct ptlrpc_service *svc;
unsigned long flags;
char str[PTL_NALFMT_SIZE];
int i;
/* CAVEAT EMPTOR: spinlock order */
spin_lock_irqsave (&exp->exp_lock, flags);
list_for_each (tmp, &exp->exp_outstanding_replies) {
oldrep = list_entry(tmp, struct ptlrpc_reply_state,rs_exp_list);
if (oldrep->rs_xid != req->rq_xid)
continue;
if (oldrep->rs_msg.opc != req->rq_reqmsg->opc)
CERROR ("Resent req xid "LPX64" has mismatched opc: "
"new %d old %d\n", req->rq_xid,
req->rq_reqmsg->opc, oldrep->rs_msg.opc);
svc = oldrep->rs_srv_ni->sni_service;
spin_lock (&svc->srv_lock);
list_del_init (&oldrep->rs_exp_list);
CWARN("Stealing %d locks from rs %p x"LPD64".t"LPD64
" o%d NID %s\n",
oldrep->rs_nlocks, oldrep,
oldrep->rs_xid, oldrep->rs_transno, oldrep->rs_msg.opc,
ptlrpc_peernid2str(&exp->exp_connection->c_peer, str));
for (i = 0; i < oldrep->rs_nlocks; i++)
ptlrpc_save_lock(req,
&oldrep->rs_locks[i],
oldrep->rs_modes[i]);
oldrep->rs_nlocks = 0;
DEBUG_REQ(D_HA, req, "stole locks for");
ptlrpc_schedule_difficult_reply (oldrep);
spin_unlock (&svc->srv_lock);
spin_unlock_irqrestore (&exp->exp_lock, flags);
return;
}
spin_unlock_irqrestore (&exp->exp_lock, flags);
}
void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd)
{
DEBUG_REQ(D_HA, req, "restoring transno "LPD64"/status %d",
mcd->mcd_last_transno, mcd->mcd_last_result);
req->rq_repmsg->transno = req->rq_transno = mcd->mcd_last_transno;
req->rq_repmsg->status = req->rq_status = mcd->mcd_last_result;
mds_steal_ack_locks(req);
}
static void reconstruct_reint_setattr(struct mds_update_record *rec,
int offset, struct ptlrpc_request *req)
{
struct mds_export_data *med = &req->rq_export->exp_mds_data;
struct mds_obd *obd = &req->rq_export->exp_obd->u.mds;
struct dentry *de;
struct mds_body *body;
mds_req_from_mcd(req, med->med_mcd);
de = mds_fid2dentry(obd, rec->ur_fid1, NULL);
if (IS_ERR(de)) {
LASSERT(PTR_ERR(de) == req->rq_status); return;
}
body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
mds_pack_inode2fid(req2obd(req), &body->fid1, de->d_inode);
mds_pack_inode2body(req2obd(req), body, de->d_inode);
/* Don't return OST-specific attributes if we didn't just set them */
if (rec->ur_iattr.ia_valid & ATTR_SIZE)
body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
body->valid |= OBD_MD_FLMTIME;
if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
body->valid |= OBD_MD_FLATIME;
l_dput(de);
}
/* In the raw-setattr case, we lock the child inode.
* In the write-back case or if being called from open, the client holds a lock
* already.
*
* We use the ATTR_FROM_OPEN flag to tell these cases apart. */
static int mds_reint_setattr(struct mds_update_record *rec, int offset,
struct ptlrpc_request *req,
struct lustre_handle *lh)
{
struct mds_obd *mds = mds_req2mds(req);
struct obd_device *obd = req->rq_export->exp_obd;
struct mds_body *body;
struct dentry *de;
struct inode *inode = NULL;
struct lustre_handle lockh[2] = {{0}, {0}};
int parent_mode;
void *handle = NULL;
struct mds_logcancel_data *mlcd = NULL;
int rc = 0, cleanup_phase = 0, err, locked = 0;
ENTRY;
LASSERT(offset == 0);
DEBUG_REQ(D_INODE, req, "setattr "LPU64"/%u %x", rec->ur_fid1->id,
rec->ur_fid1->generation, rec->ur_iattr.ia_valid);
MDS_CHECK_RESENT(req, reconstruct_reint_setattr(rec, offset, req));
if (rec->ur_iattr.ia_valid & ATTR_FROM_OPEN) {
de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
if (IS_ERR(de))
GOTO(cleanup, rc = PTR_ERR(de));
} else {
__u64 lockpart = MDS_INODELOCK_UPDATE;
if (rec->ur_iattr.ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID) )
lockpart |= MDS_INODELOCK_LOOKUP;
de = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, LCK_PW,
lockh, &parent_mode, NULL, 0, lockpart);
if (IS_ERR(de))
GOTO(cleanup, rc = PTR_ERR(de));
locked = 1;
}
cleanup_phase = 1;
inode = de->d_inode;
LASSERT(inode);
if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
rec->ur_eadata != NULL)
down(&inode->i_sem);
OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE, inode->i_sb);
handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_CTIME))
CDEBUG(D_INODE, "setting mtime %lu, ctime %lu\n",
LTIME_S(rec->ur_iattr.ia_mtime),
LTIME_S(rec->ur_iattr.ia_ctime));
rc = mds_fix_attr(inode, rec);
if (rc)
GOTO(cleanup, rc);
if (rec->ur_iattr.ia_valid & ATTR_ATTR_FLAG) /* ioctl */
rc = fsfilt_iocontrol(obd, inode, NULL, EXT3_IOC_SETFLAGS,
(long)&rec->ur_iattr.ia_attr_flags);
else /* setattr */
rc = fsfilt_setattr(obd, de, handle, &rec->ur_iattr, 0);
if (rc == 0 && (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
rec->ur_eadata != NULL) {
struct lov_stripe_md *lsm = NULL;
rc = ll_permission(inode, MAY_WRITE, NULL);
if (rc < 0)
GOTO(cleanup, rc);
rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
mds->mds_osc_exp, 0, &lsm, rec->ur_eadata);
if (rc)
GOTO(cleanup, rc);
obd_free_memmd(mds->mds_osc_exp, &lsm);
rc = fsfilt_set_md(obd, inode, handle, rec->ur_eadata,
rec->ur_eadatalen);
if (rc)
GOTO(cleanup, rc);
}
body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
mds_pack_inode2fid(obd, &body->fid1, inode);
mds_pack_inode2body(obd, body, inode);
/* Don't return OST-specific attributes if we didn't just set them */
if (rec->ur_iattr.ia_valid & ATTR_SIZE)
body->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
if (rec->ur_iattr.ia_valid & (ATTR_MTIME | ATTR_MTIME_SET))
body->valid |= OBD_MD_FLMTIME;
if (rec->ur_iattr.ia_valid & (ATTR_ATIME | ATTR_ATIME_SET))
body->valid |= OBD_MD_FLATIME;
if (rc == 0 && rec->ur_cookielen && !IS_ERR(mds->mds_osc_obd)) {
OBD_ALLOC(mlcd, sizeof(*mlcd) + rec->ur_cookielen +
rec->ur_eadatalen);
if (mlcd) {
mlcd->mlcd_size = sizeof(*mlcd) + rec->ur_cookielen +
rec->ur_eadatalen;
mlcd->mlcd_eadatalen = rec->ur_eadatalen;
mlcd->mlcd_cookielen = rec->ur_cookielen;
mlcd->mlcd_lmm = (void *)&mlcd->mlcd_cookies +
mlcd->mlcd_cookielen;
memcpy(&mlcd->mlcd_cookies, rec->ur_logcookies,
mlcd->mlcd_cookielen);
memcpy(mlcd->mlcd_lmm, rec->ur_eadata,
mlcd->mlcd_eadatalen);
} else {
CERROR("unable to allocate log cancel data\n");
}
} EXIT;
cleanup:
if (mlcd != NULL)
fsfilt_add_journal_cb(req->rq_export->exp_obd, mds->mds_sb, 0,
handle, mds_cancel_cookies_cb, mlcd);
err = mds_finish_transno(mds, inode, handle, req, rc, 0);
switch (cleanup_phase) {
case 1:
if ((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) &&
rec->ur_eadata != NULL)
up(&inode->i_sem);
l_dput(de);
if (locked) {
#ifdef S_PDIROPS
if (lockh[1].cookie != 0)
ldlm_lock_decref(lockh + 1, parent_mode);
#endif
if (rc) {
ldlm_lock_decref(lockh, LCK_PW);
} else {
ptlrpc_save_lock (req, lockh, LCK_PW);
}
}
case 0:
break;
default:
LBUG();
}
if (err && !rc)
rc = err;
req->rq_status = rc;
return 0;
}
static void reconstruct_reint_create(struct mds_update_record *rec, int offset,
struct ptlrpc_request *req)
{
struct mds_export_data *med = &req->rq_export->exp_mds_data;
struct mds_obd *obd = &req->rq_export->exp_obd->u.mds;
struct dentry *parent, *child;
struct mds_body *body;
ENTRY;
mds_req_from_mcd(req, med->med_mcd);
if (req->rq_status) {
EXIT;
return;
}
parent = mds_fid2dentry(obd, rec->ur_fid1, NULL);
LASSERT(!IS_ERR(parent));
child = ll_lookup_one_len(rec->ur_name, parent, rec->ur_namelen - 1);
LASSERT(!IS_ERR(child));
if ((child->d_flags & DCACHE_CROSS_REF)) {
LASSERTF(child->d_inode == NULL, "BUG 3869");
body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
mds_pack_dentry2fid(&body->fid1, child);
mds_pack_dentry2body(body, child);
body->valid |= OBD_MD_MDS;
} else if (child->d_inode == NULL) {
DEBUG_REQ(D_ERROR, req, "parent "LPU64"/%u name %s mode %o",
rec->ur_fid1->id, rec->ur_fid1->generation,
rec->ur_name, rec->ur_mode);
LASSERTF(child->d_inode != NULL, "BUG 3869");
} else {
body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
mds_pack_inode2fid(req2obd(req), &body->fid1, child->d_inode);
mds_pack_inode2body(req2obd(req), body, child->d_inode); }
l_dput(parent);
l_dput(child);
EXIT;
}
static int mds_reint_create(struct mds_update_record *rec, int offset,
struct ptlrpc_request *req,
struct lustre_handle *lh)
{
struct dentry *dparent = NULL;
struct mds_obd *mds = mds_req2mds(req);
struct obd_device *obd = req->rq_export->exp_obd;
struct dentry *dchild = NULL;
struct inode *dir = NULL;
void *handle = NULL;
struct lustre_handle lockh[2] = {{0}, {0}};
int parent_mode;
int rc = 0, err, type = rec->ur_mode & S_IFMT, cleanup_phase = 0;
int created = 0;
struct dentry_params dp;
struct mea *mea = NULL;
int mea_size;
ENTRY;
LASSERT(offset == 0);
LASSERT(!strcmp(req->rq_export->exp_obd->obd_type->typ_name, LUSTRE_MDS_NAME));
DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u name %s mode %o",
rec->ur_fid1->id, rec->ur_fid1->generation,
rec->ur_name, rec->ur_mode);
MDS_CHECK_RESENT(req, reconstruct_reint_create(rec, offset, req));
if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE))
GOTO(cleanup, rc = -ESTALE);
dparent = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, LCK_PW, lockh,
&parent_mode, rec->ur_name,
rec->ur_namelen - 1, MDS_INODELOCK_UPDATE);
if (IS_ERR(dparent)) {
rc = PTR_ERR(dparent);
CERROR("parent lookup error %d\n", rc);
GOTO(cleanup, rc);
}
cleanup_phase = 1; /* locked parent dentry */
dir = dparent->d_inode;
LASSERT(dir);
ldlm_lock_dump_handle(D_OTHER, lockh);
/* try to retrieve MEA data for this dir */
rc = mds_get_lmv_attr(obd, dparent->d_inode, &mea, &mea_size);
if (rc)
GOTO(cleanup, rc);
if (mea != NULL) {
/* dir is already splitted, check is requested filename
* should live at this MDS or at another one */
int i;
i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
if (mea->mea_master != mea->mea_fids[i].mds) {
CDEBUG(D_OTHER, "inapropriate MDS(%d) for %lu/%u:%s."
" should be %d(%d)\n",
mea->mea_master, dparent->d_inode->i_ino,
dparent->d_inode->i_generation, rec->ur_name,
mea->mea_fids[i].mds, i);
GOTO(cleanup, rc = -ERESTART);
}
}
dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1);
if (IS_ERR(dchild)) {
rc = PTR_ERR(dchild);
CERROR("child lookup error %d\n", rc);
GOTO(cleanup, rc);
}
cleanup_phase = 2; /* child dentry */
OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb);
if (type == S_IFREG || type == S_IFDIR) {
rc = mds_try_to_split_dir(obd, dparent, &mea, 0, parent_mode);
CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d/%d\n",
obd->obd_name, dparent->d_inode->i_ino,
dparent->d_inode->i_generation, rc, parent_mode);
if (rc > 0) {
/* dir got splitted */
GOTO(cleanup, rc = -ERESTART);
} else if (rc < 0) {
/* error happened during spitting. */
GOTO(cleanup, rc);
}
}
if (dir->i_mode & S_ISGID) {
if (S_ISDIR(rec->ur_mode))
rec->ur_mode |= S_ISGID;
}
dchild->d_fsdata = (void *)&dp;
dp.p_inum = (unsigned long)rec->ur_fid2->id;
dp.p_ptr = req;
switch (type) {
case S_IFREG:{
handle = fsfilt_start(obd, dir, FSFILT_OP_CREATE, NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
rc = ll_vfs_create(dir, dchild, rec->ur_mode, NULL);
EXIT;
break;
}
case S_IFDIR:{
int nstripes = 0;
int i;
/* as Peter asked, mkdir() should distribute new directories
* over the whole cluster in order to distribute namespace
* processing load. first, we calculate which MDS to use to put
* new directory's inode in. */
i = mds_choose_mdsnum(obd, rec->ur_name, rec->ur_namelen - 1,
rec->ur_flags);
if (i == mds->mds_num) {
/* inode will be created locally */
handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
rc = vfs_mkdir(dir, dchild, rec->ur_mode);
if (rec->ur_eadata)
nstripes = *(u16 *)rec->ur_eadata;
if (rc == 0 && nstripes) {
/* we pass LCK_EX to split routine to
* signalthat we have exclusive access
* to the directory. simple because
* nobody knows it already exists -bzzz */ rc = mds_try_to_split_dir(obd, dchild,
NULL, nstripes,
LCK_EX);
if (rc > 0) {
/* dir got splitted */
rc = 0;
} else if (rc < 0) {
/* an error occured during
* splitting. */
GOTO(cleanup, rc);
}
}
} else if (!DENTRY_VALID(dchild)) {
/* inode will be created on another MDS */
struct obdo *oa = NULL;
struct mds_body *body;
/* first, create that inode */
oa = obdo_alloc();
LASSERT(oa != NULL);
oa->o_mds = i;
oa->o_easize = 0;
if (rec->ur_eadata) {
/* user asks for creating splitted dir */
oa->o_easize = *((u16 *) rec->ur_eadata);
}
obdo_from_inode(oa, dir, OBD_MD_FLTYPE | OBD_MD_FLATIME |
OBD_MD_FLMTIME | OBD_MD_FLCTIME |
OBD_MD_FLUID | OBD_MD_FLGID);
oa->o_mode = dir->i_mode;
CDEBUG(D_OTHER, "%s: create dir on MDS %u\n",
obd->obd_name, i);
if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
CWARN("%s: replay dir creation %*s -> %u/%u\n",
obd->obd_name, rec->ur_namelen - 1,
rec->ur_name, (unsigned) rec->ur_fid2->id,
(unsigned) rec->ur_fid2->generation);
oa->o_id = rec->ur_fid2->id;
oa->o_generation = rec->ur_fid2->generation;
oa->o_flags |= OBD_FL_RECREATE_OBJS;
}
rc = obd_create(mds->mds_lmv_exp, oa, NULL, NULL);
if (rc) {
obdo_free(oa);
GOTO(cleanup, rc);
}
/* now, add new dir entry for it */
handle = fsfilt_start(obd, dir, FSFILT_OP_MKDIR, NULL);
if (IS_ERR(handle)) {
obdo_free(oa);
GOTO(cleanup, rc = PTR_ERR(handle));
}
rc = fsfilt_add_dir_entry(obd, dparent, rec->ur_name,
rec->ur_namelen - 1,
oa->o_id, oa->o_generation,
i);
LASSERT(rc == 0);
/* fill reply */
body = lustre_msg_buf(req->rq_repmsg,
offset, sizeof (*body));
body->valid |= OBD_MD_FLID | OBD_MD_MDS;
body->fid1.id = oa->o_id;
body->fid1.mds = i;
body->fid1.generation = oa->o_generation;
obdo_free(oa);
} else { /* requested name exists in the directory */
rc = -EEXIST;
}
EXIT;
break;
}
case S_IFLNK:{
handle = fsfilt_start(obd, dir, FSFILT_OP_SYMLINK, NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
if (rec->ur_tgt == NULL) /* no target supplied */
rc = -EINVAL; /* -EPROTO? */
else
rc = vfs_symlink(dir, dchild, rec->ur_tgt);
EXIT;
break;
}
case S_IFCHR:
case S_IFBLK:
case S_IFIFO:
case S_IFSOCK:{
int rdev = rec->ur_rdev;
handle = fsfilt_start(obd, dir, FSFILT_OP_MKNOD, NULL);
if (IS_ERR(handle))
GOTO(cleanup, (handle = NULL, rc = PTR_ERR(handle)));
rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
EXIT;
break;
}
default:
CERROR("bad file type %o creating %s\n", type, rec->ur_name);
dchild->d_fsdata = NULL;
GOTO(cleanup, rc = -EINVAL);
}
/* In case we stored the desired inum in here, we want to clean up. */
if (dchild->d_fsdata == (void *)(unsigned long)rec->ur_fid2->id)
dchild->d_fsdata = NULL;
if (rc) {
CDEBUG(D_INODE, "error during create: %d\n", rc);
GOTO(cleanup, rc);
} else if (dchild->d_inode) {
struct iattr iattr;
struct inode *inode = dchild->d_inode;
struct mds_body *body;
created = 1;
LTIME_S(iattr.ia_atime) = LTIME_S(rec->ur_time);
LTIME_S(iattr.ia_ctime) = LTIME_S(rec->ur_time);
LTIME_S(iattr.ia_mtime) = LTIME_S(rec->ur_time);
iattr.ia_uid = rec->_ur_fsuid;
if (dir->i_mode & S_ISGID)
iattr.ia_gid = dir->i_gid;
else
iattr.ia_gid = rec->_ur_fsgid;
iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
ATTR_MTIME | ATTR_CTIME;
if (rec->ur_fid2->id) {
LASSERT(rec->ur_fid2->id == inode->i_ino);
inode->i_generation = rec->ur_fid2->generation;
/* Dirtied and committed by the upcoming setattr. */
CDEBUG(D_INODE, "recreated ino %lu with gen %u\n",
inode->i_ino, inode->i_generation);
} else {
#if 0
struct lustre_handle child_ino_lockh;
#endif
CDEBUG(D_INODE, "created ino %lu with gen %x\n",
inode->i_ino, inode->i_generation);
#if 0
/* The inode we were allocated may have just been freed
* by an unlink operation. We take this lock to
* synchronize against the matching reply-ack-lock taken
* in unlink, to avoid replay problems if this reply
* makes it out to the client but the unlink's does not.
* See bug 2029 for more detail.*/
rc = mds_lock_new_child(obd, inode, &child_ino_lockh);
if (rc != ELDLM_OK) {
CERROR("error locking for unlink/create sync: "
"%d\n", rc);
} else {
ldlm_lock_decref(&child_ino_lockh, LCK_EX);
}
#endif
}
rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
if (rc)
CERROR("error on child setattr: rc = %d\n", rc);
iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
if (rc)
CERROR("error on parent setattr: rc = %d\n", rc);
body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
mds_pack_inode2fid(obd, &body->fid1, inode);
mds_pack_inode2body(obd, body, inode);
}
EXIT;
cleanup:
err = mds_finish_transno(mds, dir, handle, req, rc, 0);
if (rc && created) {
/* Destroy the file we just created. This should not need extra
* journal credits, as we have already modified all of the
* blocks needed in order to create the file in the first
* place. */
switch (type) {
case S_IFDIR:
err = vfs_rmdir(dir, dchild);
if (err)
CERROR("rmdir in error path: %d\n", err);
break;
default:
err = vfs_unlink(dir, dchild);
if (err)
CERROR("unlink in error path: %d\n", err);
break;
}
} else {
rc = err;
}
switch (cleanup_phase) {
case 2: /* child dentry */
l_dput(dchild);
case 1: /* locked parent dentry */
#ifdef S_PDIROPS
if (lockh[1].cookie != 0)
ldlm_lock_decref(lockh + 1, parent_mode);
#endif
if (rc) {
ldlm_lock_decref(lockh, LCK_PW);
} else {
ptlrpc_save_lock(req, lockh, LCK_PW); }
l_dput(dparent);
case 0:
break;
default:
CERROR("invalid cleanup_phase %d\n", cleanup_phase);
LBUG();
}
if (mea)
OBD_FREE(mea, mea_size);
req->rq_status = rc;
return 0;
}
static int res_gt(struct ldlm_res_id *res1, struct ldlm_res_id *res2,
ldlm_policy_data_t *p1, ldlm_policy_data_t *p2)
{
int i;
for (i = 0; i < RES_NAME_SIZE; i++) {
/* return 1 here, because enqueue_ordered will skip resources
* of all zeroes if they're sorted to the end of the list. */
if (res1->name[i] == 0 && res2->name[i] != 0)
return 1;
if (res2->name[i] == 0 && res1->name[i] != 0)
return 0;
if (res1->name[i] > res2->name[i])
return 1;
if (res1->name[i] < res2->name[i])
return 0;
}
if (!p1 || !p2)
return 0;
if (memcmp(p1, p2, sizeof(*p1)) < 0)
return 1;
return 0;
}
/* This function doesn't use ldlm_match_or_enqueue because we're always called
* with EX or PW locks, and the MDS is no longer allowed to match write locks,
* because they take the place of local semaphores.
*
* One or two locks are taken in numerical order. A res_id->name[0] of 0 means
* no lock is taken for that res_id. Must be at least one non-zero res_id. */
int enqueue_ordered_locks(struct obd_device *obd, struct ldlm_res_id *p1_res_id,
struct lustre_handle *p1_lockh, int p1_lock_mode,
ldlm_policy_data_t *p1_policy,
struct ldlm_res_id *p2_res_id,
struct lustre_handle *p2_lockh, int p2_lock_mode,
ldlm_policy_data_t *p2_policy)
{
struct ldlm_res_id *res_id[2] = { p1_res_id, p2_res_id };
struct lustre_handle *handles[2] = { p1_lockh, p2_lockh };
int lock_modes[2] = { p1_lock_mode, p2_lock_mode };
ldlm_policy_data_t *policies[2] = { p1_policy, p2_policy };
int rc, flags;
ENTRY;
LASSERT(p1_res_id != NULL && p2_res_id != NULL);
CDEBUG(D_INFO, "locks before: "LPU64"/"LPU64"\n", res_id[0]->name[0],
res_id[1]->name[0]);
if (res_gt(p1_res_id, p2_res_id, p1_policy, p2_policy)) {
handles[1] = p1_lockh;
handles[0] = p2_lockh; res_id[1] = p1_res_id;
res_id[0] = p2_res_id;
lock_modes[1] = p1_lock_mode;
lock_modes[0] = p2_lock_mode;
policies[1] = p1_policy;
policies[0] = p2_policy;
}
CDEBUG(D_DLMTRACE, "lock order: "LPU64"/"LPU64"\n",
res_id[0]->name[0], res_id[1]->name[0]);
flags = LDLM_FL_LOCAL_ONLY;
rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, *res_id[0],
LDLM_IBITS, policies[0], lock_modes[0], &flags,
mds_blocking_ast, ldlm_completion_ast, NULL, NULL,
NULL, 0, NULL, handles[0]);
if (rc != ELDLM_OK)
RETURN(-EIO);
ldlm_lock_dump_handle(D_OTHER, handles[0]);
if (!memcmp(res_id[0], res_id[1], sizeof(*res_id[0])) &&
(policies[0]->l_inodebits.bits & policies[1]->l_inodebits.bits)) {
memcpy(handles[1], handles[0], sizeof(*(handles[1])));
ldlm_lock_addref(handles[1], lock_modes[1]);
} else if (res_id[1]->name[0] != 0) {
flags = LDLM_FL_LOCAL_ONLY;
rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
*res_id[1], LDLM_IBITS, policies[1],
lock_modes[1], &flags, mds_blocking_ast,
ldlm_completion_ast, NULL, NULL, NULL, 0,
NULL, handles[1]);
if (rc != ELDLM_OK) {
ldlm_lock_decref(handles[0], lock_modes[0]);
RETURN(-EIO);
}
ldlm_lock_dump_handle(D_OTHER, handles[1]);
}
RETURN(0);
}
int enqueue_4ordered_locks(struct obd_device *obd,struct ldlm_res_id *p1_res_id,
struct lustre_handle *p1_lockh, int p1_lock_mode,
ldlm_policy_data_t *p1_policy,
struct ldlm_res_id *p2_res_id,
struct lustre_handle *p2_lockh, int p2_lock_mode,
ldlm_policy_data_t *p2_policy,
struct ldlm_res_id *c1_res_id,
struct lustre_handle *c1_lockh, int c1_lock_mode,
ldlm_policy_data_t *c1_policy,
struct ldlm_res_id *c2_res_id,
struct lustre_handle *c2_lockh, int c2_lock_mode,
ldlm_policy_data_t *c2_policy)
{
struct ldlm_res_id *res_id[5] = { p1_res_id, p2_res_id,
c1_res_id, c2_res_id };
struct lustre_handle *dlm_handles[5] = { p1_lockh, p2_lockh,
c1_lockh, c2_lockh };
int lock_modes[5] = { p1_lock_mode, p2_lock_mode,
c1_lock_mode, c2_lock_mode };
ldlm_policy_data_t *policies[5] = { p1_policy, p2_policy,
c1_policy, c2_policy};
int rc, i, j, sorted, flags;
ENTRY;
CDEBUG(D_DLMTRACE,
"locks before: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
res_id[3]->name[0]);
/* simple insertion sort - we have at most 4 elements */
for (i = 1; i < 4; i++) {
j = i - 1;
dlm_handles[4] = dlm_handles[i];
res_id[4] = res_id[i];
lock_modes[4] = lock_modes[i];
policies[4] = policies[i];
sorted = 0;
do {
if (res_gt(res_id[j], res_id[4], policies[j],
policies[4])) {
dlm_handles[j + 1] = dlm_handles[j];
res_id[j + 1] = res_id[j];
lock_modes[j + 1] = lock_modes[j];
policies[j + 1] = policies[j];
j--;
} else {
sorted = 1;
}
} while (j >= 0 && !sorted);
dlm_handles[j + 1] = dlm_handles[4];
res_id[j + 1] = res_id[4];
lock_modes[j + 1] = lock_modes[4];
policies[j + 1] = policies[4];
}
CDEBUG(D_DLMTRACE,
"lock order: "LPU64"/"LPU64"/"LPU64"/"LPU64"\n",
res_id[0]->name[0], res_id[1]->name[0], res_id[2]->name[0],
res_id[3]->name[0]);
/* XXX we could send ASTs on all these locks first before blocking? */
for (i = 0; i < 4; i++) {
flags = 0;
if (res_id[i]->name[0] == 0)
break;
if (i != 0 &&
!memcmp(res_id[i], res_id[i-1], sizeof(*res_id[i])) &&
(policies[i]->l_inodebits.bits &
policies[i-1]->l_inodebits.bits) ) {
memcpy(dlm_handles[i], dlm_handles[i-1],
sizeof(*(dlm_handles[i])));
ldlm_lock_addref(dlm_handles[i], lock_modes[i]);
} else {
rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
*res_id[i], LDLM_IBITS,
policies[i],
lock_modes[i], &flags,
mds_blocking_ast,
ldlm_completion_ast, NULL, NULL,
NULL, 0, NULL, dlm_handles[i]);
if (rc != ELDLM_OK)
GOTO(out_err, rc = -EIO);
ldlm_lock_dump_handle(D_OTHER, dlm_handles[i]);
}
}
RETURN(0);
out_err:
while (i-- > 0)
ldlm_lock_decref(dlm_handles[i], lock_modes[i]);
return rc;
}
/* In the unlikely case that the child changed while we were waiting
* on the lock, we need to drop the lock on the old child and either:
* - if the child has a lower resource name, then we have to also * drop the parent lock and regain the locks in the right order
* - in the rename case, if the child has a lower resource name than one of
* the other parent/child resources (maxres) we also need to reget the locks
* - if the child has a higher resource name (this is the common case)
* we can just get the lock on the new child (still in lock order)
*
* Returns 0 if the child did not change or if it changed but could be locked.
* Returns 1 if the child changed and we need to re-lock (no locks held).
* Returns -ve error with a valid dchild (no locks held). */
static int mds_verify_child(struct obd_device *obd,
struct ldlm_res_id *parent_res_id,
struct lustre_handle *parent_lockh,
struct dentry *dparent, int parent_mode,
struct ldlm_res_id *child_res_id,
struct lustre_handle *child_lockh,
struct dentry **dchildp, int child_mode,
ldlm_policy_data_t *child_policy,
const char *name, int namelen,
struct ldlm_res_id *maxres)
{
struct dentry *vchild, *dchild = *dchildp;
int rc = 0, cleanup_phase = 2; /* parent, child locks */
ENTRY;
vchild = ll_lookup_one_len(name, dparent, namelen - 1);
if (IS_ERR(vchild))
GOTO(cleanup, rc = PTR_ERR(vchild));
if ((vchild->d_flags & DCACHE_CROSS_REF)) {
if (child_res_id->name[0] == vchild->d_inum &&
child_res_id->name[1] == vchild->d_generation) {
if (dchild != NULL)
l_dput(dchild);
*dchildp = vchild;
RETURN(0);
}
goto changed;
}
if (likely((vchild->d_inode == NULL && child_res_id->name[0] == 0) ||
(vchild->d_inode != NULL &&
child_res_id->name[0] == vchild->d_inode->i_ino &&
child_res_id->name[1] == vchild->d_inode->i_generation))) {
if (dchild != NULL)
l_dput(dchild);
*dchildp = vchild;
RETURN(0);
}
changed:
CDEBUG(D_DLMTRACE, "child inode changed: %p != %p (%lu != "LPU64")\n",
vchild->d_inode, dchild ? dchild->d_inode : 0,
vchild->d_inode ? vchild->d_inode->i_ino : 0,
child_res_id->name[0]);
if (child_res_id->name[0] != 0)
ldlm_lock_decref(child_lockh, child_mode);
if (dchild)
l_dput(dchild);
cleanup_phase = 1; /* parent lock only */
*dchildp = dchild = vchild;
if (dchild->d_inode || (dchild->d_flags & DCACHE_CROSS_REF)) {
int flags = 0;
if (dchild->d_inode) {
child_res_id->name[0] = dchild->d_inode->i_ino;
child_res_id->name[1] = dchild->d_inode->i_generation;
} else {
child_res_id->name[0] = dchild->d_inum; child_res_id->name[1] = dchild->d_generation;
}
if (res_gt(parent_res_id, child_res_id, NULL, NULL) ||
res_gt(maxres, child_res_id, NULL, NULL)) {
CDEBUG(D_DLMTRACE, "relock "LPU64"<("LPU64"|"LPU64")\n",
child_res_id->name[0], parent_res_id->name[0],
maxres->name[0]);
GOTO(cleanup, rc = 1);
}
rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
*child_res_id, LDLM_IBITS, child_policy,
child_mode, &flags, mds_blocking_ast,
ldlm_completion_ast, NULL, NULL, NULL, 0,
NULL, child_lockh);
if (rc != ELDLM_OK)
GOTO(cleanup, rc = -EIO);
} else {
memset(child_res_id, 0, sizeof(*child_res_id));
}
EXIT;
cleanup:
if (rc) {
switch(cleanup_phase) {
case 2:
if (child_res_id->name[0] != 0)
ldlm_lock_decref(child_lockh, child_mode);
case 1:
ldlm_lock_decref(parent_lockh, parent_mode);
}
}
return rc;
}
int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds,
struct ll_fid *fid,
struct lustre_handle *parent_lockh,
struct dentry **dparentp, int parent_mode,
__u64 parent_lockpart, int *update_mode,
char *name, int namelen,
struct lustre_handle *child_lockh,
struct dentry **dchildp, int child_mode,
__u64 child_lockpart, void *clone_info)
{
struct ldlm_res_id child_res_id = { .name = {0} };
struct ldlm_res_id parent_res_id = { .name = {0} };
ldlm_policy_data_t parent_policy = {.l_inodebits = { parent_lockpart }};
ldlm_policy_data_t child_policy = {.l_inodebits = { child_lockpart }};
struct inode *inode;
int rc = 0, cleanup_phase = 0;
ENTRY;
/* Step 1: Lookup parent */
*dparentp = mds_fid2dentry(mds, fid, NULL);
if (IS_ERR(*dparentp)) {
rc = PTR_ERR(*dparentp);
*dparentp = NULL;
RETURN(rc);
}
CDEBUG(D_INODE, "parent ino %lu, name %s\n",
(*dparentp)->d_inode->i_ino, name);
parent_res_id.name[0] = (*dparentp)->d_inode->i_ino;
parent_res_id.name[1] = (*dparentp)->d_inode->i_generation;
#ifdef S_PDIROPS
parent_lockh[1].cookie = 0; if (name && IS_PDIROPS((*dparentp)->d_inode)) {
struct ldlm_res_id res_id = { .name = {0} };
ldlm_policy_data_t policy;
int flags = 0;
*update_mode = mds_lock_mode_for_dir(obd, *dparentp, parent_mode);
if (*update_mode) {
res_id.name[0] = (*dparentp)->d_inode->i_ino;
res_id.name[1] = (*dparentp)->d_inode->i_generation;
policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
res_id, LDLM_IBITS, &policy,
*update_mode, &flags,
mds_blocking_ast,
ldlm_completion_ast,
NULL, NULL, NULL, 0, NULL,
parent_lockh + 1);
if (rc != ELDLM_OK)
RETURN(-ENOLCK);
}
parent_res_id.name[2] = full_name_hash(name, namelen - 1);
CDEBUG(D_INFO, "take lock on %lu:%u:"LPX64"\n",
(*dparentp)->d_inode->i_ino,
(*dparentp)->d_inode->i_generation,
parent_res_id.name[2]);
}
#endif
cleanup_phase = 1; /* parent dentry */
#ifdef CONFIG_SNAPFS
if (clone_info) {
/*FIXME is there any other FUNC will use d_fsdata,
*excepet creating inode according inum*/
(*dparentp)->d_fsdata = clone_info;
}
#endif
/* Step 2: Lookup child (without DLM lock, to get resource name) */
*dchildp = ll_lookup_one_len(name, *dparentp, namelen - 1);
if (IS_ERR(*dchildp)) {
rc = PTR_ERR(*dchildp);
CDEBUG(D_INODE, "child lookup error %d\n", rc);
GOTO(cleanup, rc);
}
if ((*dchildp)->d_flags & DCACHE_CROSS_REF) {
/* inode lives on another MDS: return * mds/ino/gen
* and LOOKUP lock. drop possible UPDATE lock! */
child_policy.l_inodebits.bits &= ~MDS_INODELOCK_UPDATE;
child_policy.l_inodebits.bits |= MDS_INODELOCK_LOOKUP;
child_res_id.name[0] = (*dchildp)->d_inum;
child_res_id.name[1] = (*dchildp)->d_generation;
goto retry_locks;
}
inode = (*dchildp)->d_inode;
if (inode != NULL)
inode = igrab(inode);
if (inode == NULL)
goto retry_locks;
child_res_id.name[0] = inode->i_ino;
child_res_id.name[1] = inode->i_generation;
iput(inode);
retry_locks:
cleanup_phase = 2; /* child dentry */
/* Step 3: Lock parent and child in resource order. If child doesn't * exist, we still have to lock the parent and re-lookup. */
rc = enqueue_ordered_locks(obd,&parent_res_id,parent_lockh,parent_mode,
&parent_policy, &child_res_id, child_lockh,
child_mode, &child_policy);
if (rc)
GOTO(cleanup, rc);
if ((*dchildp)->d_inode || ((*dchildp)->d_flags & DCACHE_CROSS_REF))
cleanup_phase = 4; /* child lock */
else
cleanup_phase = 3; /* parent lock */
/* Step 4: Re-lookup child to verify it hasn't changed since locking */
rc = mds_verify_child(obd, &parent_res_id, parent_lockh, *dparentp,
parent_mode, &child_res_id, child_lockh,
dchildp, child_mode, &child_policy,
name, namelen, &parent_res_id);
if (rc > 0)
goto retry_locks;
if (rc < 0) {
cleanup_phase = 3;
GOTO(cleanup, rc);
}
cleanup:
if (rc) {
switch (cleanup_phase) {
case 4:
ldlm_lock_decref(child_lockh, child_mode);
case 3:
ldlm_lock_decref(parent_lockh, parent_mode);
case 2:
l_dput(*dchildp);
case 1:
#ifdef S_PDIROPS
if (parent_lockh[1].cookie)
ldlm_lock_decref(parent_lockh + 1, *update_mode);
#endif
l_dput(*dparentp);
default: ;
}
}
return rc;
}
void mds_reconstruct_generic(struct ptlrpc_request *req)
{
struct mds_export_data *med = &req->rq_export->exp_mds_data;
mds_req_from_mcd(req, med->med_mcd);
}
int mds_create_local_dentry(struct mds_update_record *rec,
struct obd_device *obd)
{
struct mds_obd *mds = &obd->u.mds;
struct inode *fids_dir = mds->mds_fids_dir->d_inode;
int fidlen = 0, rc, cleanup_phase = 0;
struct dentry *new_child = NULL;
char *fidname = rec->ur_name;
struct dentry *child = NULL;
struct lustre_handle lockh[2] = {{0}, {0}};
void *handle;
ENTRY;
down(&fids_dir->i_sem);
fidlen = ll_fid2str(fidname, rec->ur_fid1->id, rec->ur_fid1->generation);
CDEBUG(D_OTHER, "look for local dentry '%s' for %u/%u\n",
fidname, (unsigned) rec->ur_fid1->id,
(unsigned) rec->ur_fid1->generation);
new_child = lookup_one_len(fidname, mds->mds_fids_dir, fidlen);
up(&fids_dir->i_sem);
if (IS_ERR(new_child)) {
CERROR("can't lookup %s: %d\n", fidname,
(int) PTR_ERR(new_child));
GOTO(cleanup, rc = PTR_ERR(new_child));
}
cleanup_phase = 1;
if (new_child->d_inode != NULL) {
/* nice. we've already have local dentry! */
CDEBUG(D_OTHER, "found dentry in FIDS/: %u/%u\n",
(unsigned) new_child->d_inode->i_ino,
(unsigned) new_child->d_inode->i_generation);
rec->ur_fid1->id = fids_dir->i_ino;
rec->ur_fid1->generation = fids_dir->i_generation;
rec->ur_namelen = fidlen + 1;
GOTO(cleanup, rc = 0);
}
/* new, local dentry will be added soon. we need no aliases here */
d_drop(new_child);
if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
child = mds_fid2dentry(mds, rec->ur_fid1, NULL);
} else {
child = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL,
LCK_EX, lockh, NULL, NULL, 0,
MDS_INODELOCK_UPDATE);
}
if (IS_ERR(child)) {
rc = PTR_ERR(child);
if (rc != -ENOENT || !(rec->ur_mode & MDS_MODE_REPLAY))
CERROR("can't get victim: %d\n", rc);
GOTO(cleanup, rc);
}
cleanup_phase = 2;
handle = fsfilt_start(obd, fids_dir, FSFILT_OP_LINK, NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
rc = fsfilt_add_dir_entry(obd, mds->mds_fids_dir, fidname, fidlen,
rec->ur_fid1->id, rec->ur_fid1->generation,
mds->mds_num);
if (rc)
CERROR("error linking orphan %lu/%lu to FIDS: rc = %d\n",
(unsigned long) child->d_inode->i_ino,
(unsigned long) child->d_inode->i_generation, rc);
else {
if (S_ISDIR(child->d_inode->i_mode)) {
fids_dir->i_nlink++;
mark_inode_dirty(fids_dir);
}
mark_inode_dirty(child->d_inode);
}
fsfilt_commit(obd, mds->mds_sb, fids_dir, handle, 0);
rec->ur_fid1->id = fids_dir->i_ino;
rec->ur_fid1->generation = fids_dir->i_generation;
rec->ur_namelen = fidlen + 1;
cleanup:
switch(cleanup_phase) {
case 2:
if (!(rec->ur_mode & MDS_MODE_DONT_LOCK))
ldlm_lock_decref(lockh, LCK_EX);
dput(child); case 1:
dput(new_child);
case 0:
break;
}
RETURN(rc);
}
static int mds_copy_unlink_reply(struct ptlrpc_request *master,
struct ptlrpc_request *slave)
{
void *cookie, *cookie2;
struct mds_body *body2;
struct mds_body *body;
void *ea, *ea2;
ENTRY;
body = lustre_msg_buf(slave->rq_repmsg, 0, sizeof(*body));
LASSERT(body != NULL);
body2 = lustre_msg_buf(master->rq_repmsg, 0, sizeof (*body));
LASSERT(body2 != NULL);
if (!(body->valid & (OBD_MD_FLID | OBD_MD_FLGENER))) {
RETURN(0);
}
memcpy(body2, body, sizeof(*body));
body2->valid &= ~OBD_MD_FLCOOKIE;
if (!(body->valid & OBD_MD_FLEASIZE) &&
!(body->valid & OBD_MD_FLDIREA))
RETURN(0);
if (body->eadatasize == 0) {
CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
RETURN(0);
}
LASSERT(master->rq_repmsg->buflens[1] >= body->eadatasize);
ea = lustre_msg_buf(slave->rq_repmsg, 1, body->eadatasize);
LASSERT(ea != NULL);
ea2 = lustre_msg_buf(master->rq_repmsg, 1, body->eadatasize);
LASSERT(ea2 != NULL);
memcpy(ea2, ea, body->eadatasize);
if (body->valid & OBD_MD_FLCOOKIE) {
LASSERT(master->rq_repmsg->buflens[2] >=
slave->rq_repmsg->buflens[2]);
cookie = lustre_msg_buf(slave->rq_repmsg, 2,
slave->rq_repmsg->buflens[2]);
LASSERT(cookie != NULL);
cookie2 = lustre_msg_buf(master->rq_repmsg, 2,
master->rq_repmsg->buflens[2]);
LASSERT(cookie2 != NULL);
memcpy(cookie2, cookie, slave->rq_repmsg->buflens[2]);
body2->valid |= OBD_MD_FLCOOKIE;
}
RETURN(0);
}
static int mds_reint_unlink_remote(struct mds_update_record *rec, int offset,
struct ptlrpc_request *req,
struct lustre_handle *parent_lockh,
int update_mode,
struct dentry *dparent, struct lustre_handle *child_lockh,
struct dentry *dchild)
{
struct obd_device *obd = req->rq_export->exp_obd;
struct mds_obd *mds = mds_req2mds(req);
struct mdc_op_data op_data;
int rc = 0, cleanup_phase = 0;
struct ptlrpc_request *request = NULL;
void *handle;
ENTRY;
LASSERT(offset == 0 || offset == 2);
DEBUG_REQ(D_INODE, req, "unlink %*s (remote inode %u/%u/%u)",
rec->ur_namelen - 1, rec->ur_name, (unsigned)dchild->d_mdsnum,
(unsigned) dchild->d_inum, (unsigned) dchild->d_generation);
if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
DEBUG_REQ(D_HA, req, "unlink %*s (remote inode %u/%u/%u)",
rec->ur_namelen - 1, rec->ur_name,
(unsigned)dchild->d_mdsnum,
(unsigned) dchild->d_inum,
(unsigned) dchild->d_generation);
/* time to drop i_nlink on remote MDS */
memset(&op_data, 0, sizeof(op_data));
op_data.fid1.mds = dchild->d_mdsnum;
op_data.fid1.id = dchild->d_inum;
op_data.fid1.generation = dchild->d_generation;
op_data.create_mode = rec->ur_mode;
if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
op_data.create_mode |= MDS_MODE_REPLAY;
rc = md_unlink(mds->mds_lmv_exp, &op_data, &request);
cleanup_phase = 2;
if (request) {
if (rc == 0)
mds_copy_unlink_reply(req, request);
ptlrpc_req_finished(request);
}
if (rc == 0) {
handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, dchild);
rc = mds_finish_transno(mds, dparent->d_inode, handle, req,
rc, 0);
}
cleanup:
req->rq_status = rc;
#ifdef S_PDIROPS
if (parent_lockh[1].cookie != 0)
ldlm_lock_decref(parent_lockh + 1, update_mode);
#endif
ldlm_lock_decref(child_lockh, LCK_EX);
if (rc)
ldlm_lock_decref(parent_lockh, LCK_PW);
else
ptlrpc_save_lock(req, parent_lockh, LCK_PW);
l_dput(dchild);
l_dput(dparent);
return 0;
}
static int mds_reint_unlink(struct mds_update_record *rec, int offset,
struct ptlrpc_request *req,
struct lustre_handle *lh)
{
struct dentry *dparent, *dchild; struct mds_obd *mds = mds_req2mds(req);
struct obd_device *obd = req->rq_export->exp_obd;
struct mds_body *body = NULL;
struct inode *child_inode;
struct lustre_handle parent_lockh[2] = {{0}, {0}};
struct lustre_handle child_lockh = {0};
#if 0
struct lustre_handle child_reuse_lockh = {0};
#endif
struct lustre_handle * slave_lockh = NULL;
char fidname[LL_FID_NAMELEN];
void *handle = NULL;
int rc = 0, log_unlink = 0, cleanup_phase = 0;
int unlink_by_fid = 0;
int update_mode;
ENTRY;
LASSERT(offset == 0 || offset == 2);
DEBUG_REQ(D_INODE, req, "parent ino "LPU64"/%u, child %s",
rec->ur_fid1->id, rec->ur_fid1->generation, rec->ur_name);
MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK))
GOTO(cleanup, rc = -ENOENT);
if (rec->ur_namelen == 1) {
/* this is request to drop i_nlink on local inode */
unlink_by_fid = 1;
rec->ur_name = fidname;
rc = mds_create_local_dentry(rec, obd);
if (rc == -ENOENT || (rec->ur_mode & MDS_MODE_REPLAY)) {
DEBUG_REQ(D_HA, req,
"drop nlink on inode %u/%u/%u (replay)",
(unsigned) rec->ur_fid1->mds,
(unsigned) rec->ur_fid1->id,
(unsigned) rec->ur_fid1->generation);
req->rq_status = 0;
RETURN(0);
}
}
if (rec->ur_mode & MDS_MODE_DONT_LOCK) {
/* master mds for directory asks slave removing
* inode is already locked */
dparent = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL,
LCK_PW, parent_lockh,
&update_mode, rec->ur_name,
rec->ur_namelen,
MDS_INODELOCK_UPDATE);
if (IS_ERR(dparent))
GOTO(cleanup, rc = PTR_ERR(dparent));
dchild = ll_lookup_one_len(rec->ur_name, dparent,
rec->ur_namelen - 1);
if (IS_ERR(dchild))
GOTO(cleanup, rc = PTR_ERR(dchild));
child_lockh.cookie = 0;
LASSERT(!(dchild->d_flags & DCACHE_CROSS_REF));
LASSERT(dchild->d_inode != NULL);
LASSERT(S_ISDIR(dchild->d_inode->i_mode));
} else {
rc = mds_get_parent_child_locked(obd, mds, rec->ur_fid1,
parent_lockh, &dparent,
LCK_PW, MDS_INODELOCK_UPDATE,
&update_mode, rec->ur_name,
rec->ur_namelen, &child_lockh,
&dchild, LCK_EX,
MDS_INODELOCK_LOOKUP |
MDS_INODELOCK_UPDATE, NULL); }
if (rc)
GOTO(cleanup, rc);
if (dchild->d_flags & DCACHE_CROSS_REF) {
/* we should have parent lock only here */
LASSERT(unlink_by_fid == 0);
LASSERT(dchild->d_mdsnum != mds->mds_num);
mds_reint_unlink_remote(rec, offset, req, parent_lockh,
update_mode, dparent, &child_lockh, dchild);
RETURN(0);
}
cleanup_phase = 1; /* dchild, dparent, locks */
dget(dchild);
child_inode = dchild->d_inode;
if (child_inode == NULL) {
CDEBUG(D_INODE, "child doesn't exist (dir %lu, name %s)\n",
dparent ? dparent->d_inode->i_ino : 0, rec->ur_name);
GOTO(cleanup, rc = -ENOENT);
}
cleanup_phase = 2; /* dchild has a lock */
/* We have to do these checks ourselves, in case we are making an
* orphan. The client tells us whether rmdir() or unlink() was called,
* so we need to return appropriate errors (bug 72).
*
* We don't have to check permissions, because vfs_rename (called from
* mds_open_unlink_rename) also calls may_delete. */
if ((rec->ur_mode & S_IFMT) == S_IFDIR) {
if (!S_ISDIR(child_inode->i_mode))
GOTO(cleanup, rc = -ENOTDIR);
} else {
if (S_ISDIR(child_inode->i_mode))
GOTO(cleanup, rc = -EISDIR);
}
/* handle splitted dir */
rc = mds_lock_slave_objs(obd, dchild, &slave_lockh);
if (rc)
GOTO(cleanup, rc);
#if 0
/* Step 4: Get a lock on the ino to sync with creation WRT inode
* reuse (see bug 2029). */
rc = mds_lock_new_child(obd, child_inode, &child_reuse_lockh);
if (rc != ELDLM_OK)
GOTO(cleanup, rc);
#endif
cleanup_phase = 3; /* child inum lock */
OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dparent->d_inode->i_sb);
/* ldlm_reply in buf[0] if called via intent */
if (offset)
offset = 1;
body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*body));
LASSERT(body != NULL);
/* If this is the last reference to this inode, get the OBD EA
* data first so the client can destroy OST objects.
* we only do the object removal if no open files remain.
* Nobody can get at this name anymore because of the locks so
* we make decisions here as to whether to remove the inode */
if (S_ISREG(child_inode->i_mode) && child_inode->i_nlink == 1 &&
mds_open_orphan_count(child_inode) == 0) {
mds_pack_inode2fid(obd, &body->fid1, child_inode); mds_pack_inode2body(obd, body, child_inode);
mds_pack_md(obd, req->rq_repmsg, offset + 1, body,
child_inode, 1);
if (!(body->valid & OBD_MD_FLEASIZE)) {
body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
OBD_MD_FLATIME | OBD_MD_FLMTIME);
} else {
log_unlink = 1;
}
}
/* Step 4: Do the unlink: we already verified ur_mode above (bug 72) */
switch (child_inode->i_mode & S_IFMT) {
case S_IFDIR:
/* Drop any lingering child directories before we start our
* transaction, to avoid doing multiple inode dirty/delete
* in our compound transaction (bug 1321). */
shrink_dcache_parent(dchild);
handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_RMDIR,
NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
cleanup_phase = 4; /* transaction */
rc = vfs_rmdir(dparent->d_inode, dchild);
break;
case S_IFREG: {
#warning "optimization is possible here: we could drop nlink w/o removing local dentry in FIDS/"
struct lov_mds_md *lmm = lustre_msg_buf(req->rq_repmsg,
offset + 1, 0);
handle = fsfilt_start_log(obd, dparent->d_inode,
FSFILT_OP_UNLINK, NULL,
le32_to_cpu(lmm->lmm_stripe_count));
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
cleanup_phase = 4; /* transaction */
rc = vfs_unlink(dparent->d_inode, dchild);
if (!rc && log_unlink)
if (mds_log_op_unlink(obd, child_inode,
lustre_msg_buf(req->rq_repmsg, offset + 1, 0),
req->rq_repmsg->buflens[offset + 1],
lustre_msg_buf(req->rq_repmsg, offset + 2, 0),
req->rq_repmsg->buflens[offset + 2]) > 0)
body->valid |= OBD_MD_FLCOOKIE;
break;
}
case S_IFLNK:
case S_IFCHR:
case S_IFBLK:
case S_IFIFO:
case S_IFSOCK:
handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_UNLINK,
NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
cleanup_phase = 4; /* transaction */
rc = vfs_unlink(dparent->d_inode, dchild);
break;
default:
CERROR("bad file type %o unlinking %s\n", rec->ur_mode,
rec->ur_name);
LBUG();
GOTO(cleanup, rc = -EINVAL);
}
cleanup:
if (rc == 0) {
struct iattr iattr;
int err;
iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
LTIME_S(iattr.ia_mtime) = LTIME_S(rec->ur_time);
LTIME_S(iattr.ia_ctime) = LTIME_S(rec->ur_time);
err = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
if (err)
CERROR("error on parent setattr: rc = %d\n", err);
}
switch(cleanup_phase) {
case 4:
LASSERT(dchild != NULL && dchild->d_inode != NULL);
LASSERT(atomic_read(&dchild->d_inode->i_count) > 0);
if (rc == 0 && dchild->d_inode->i_nlink == 0 &&
mds_open_orphan_count(dchild->d_inode) > 0) {
/* filesystem is really going to destroy an inode
* we have to delay this till inode is opened -bzzz */
mds_open_unlink_rename(rec, obd, dparent, dchild, NULL);
}
/* handle splitted dir */
if (rc == 0) {
/* master directory can be non-empty or something else ... */
mds_unlink_slave_objs(obd, dchild);
}
rc = mds_finish_transno(mds, dparent->d_inode, handle, req,
rc, 0);
if (!rc)
(void)obd_set_info(mds->mds_osc_exp, strlen("unlinked"),
"unlinked", 0, NULL);
case 3: /* child ino-reuse lock */
#if 0
if (rc && body != NULL) {
// Don't unlink the OST objects if the MDS unlink failed
body->valid = 0;
}
if (rc)
ldlm_lock_decref(&child_reuse_lockh, LCK_EX);
else
ptlrpc_save_lock(req, &child_reuse_lockh, LCK_EX);
#endif
case 2: /* child lock */
mds_unlock_slave_objs(obd, dchild, slave_lockh);
if (child_lockh.cookie)
ldlm_lock_decref(&child_lockh, LCK_EX);
case 1: /* child and parent dentry, parent lock */
#ifdef S_PDIROPS
if (parent_lockh[1].cookie != 0)
ldlm_lock_decref(parent_lockh + 1, update_mode);
#endif
if (rc)
ldlm_lock_decref(parent_lockh, LCK_PW);
else
ptlrpc_save_lock(req, parent_lockh, LCK_PW);
l_dput(dchild);
l_dput(dchild);
l_dput(dparent);
case 0:
break;
default:
CERROR("invalid cleanup_phase %d\n", cleanup_phase);
LBUG();
}
req->rq_status = rc;
return 0;
}
/*
* to service requests from remote MDS to increment i_nlink */
static int mds_reint_link_acquire(struct mds_update_record *rec,
int offset, struct ptlrpc_request *req,
struct lustre_handle *lh)
{
struct obd_device *obd = req->rq_export->exp_obd;
struct ldlm_res_id src_res_id = { .name = {0} };
struct lustre_handle *handle = NULL, src_lockh = {0};
struct mds_obd *mds = mds_req2mds(req);
int rc = 0, cleanup_phase = 0;
struct dentry *de_src = NULL;
ldlm_policy_data_t policy;
int flags = 0;
ENTRY;
DEBUG_REQ(D_INODE, req, "%s: request to acquire i_nlinks %u/%u/%u\n",
obd->obd_name, (unsigned) rec->ur_fid1->mds,
(unsigned) rec->ur_fid1->id,
(unsigned) rec->ur_fid1->generation);
/* Step 1: Lookup the source inode and target directory by FID */
de_src = mds_fid2dentry(mds, rec->ur_fid1, NULL);
if (IS_ERR(de_src))
GOTO(cleanup, rc = PTR_ERR(de_src));
cleanup_phase = 1; /* source dentry */
src_res_id.name[0] = de_src->d_inode->i_ino;
src_res_id.name[1] = de_src->d_inode->i_generation;
policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
src_res_id, LDLM_IBITS, &policy,
LCK_EX, &flags, mds_blocking_ast,
ldlm_completion_ast, NULL, NULL,
NULL, 0, NULL, &src_lockh);
if (rc != ELDLM_OK)
GOTO(cleanup, rc = -ENOLCK);
cleanup_phase = 2; /* lock */
OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
handle = fsfilt_start(obd, de_src->d_inode, FSFILT_OP_LINK, NULL);
if (IS_ERR(handle)) {
rc = PTR_ERR(handle);
GOTO(cleanup, rc);
}
de_src->d_inode->i_nlink++;
mark_inode_dirty(de_src->d_inode);
cleanup:
rc = mds_finish_transno(mds, de_src ? de_src->d_inode : NULL,
handle, req, rc, 0);
EXIT;
switch (cleanup_phase) {
case 2:
if (rc)
ldlm_lock_decref(&src_lockh, LCK_EX);
else
ptlrpc_save_lock(req, &src_lockh, LCK_EX);
case 1:
l_dput(de_src);
case 0:
break;
default:
CERROR("invalid cleanup_phase %d\n", cleanup_phase);
LBUG();
}
req->rq_status = rc;
return 0;
}
/*
* request to link to foreign inode:
* - acquire i_nlinks on this inode
* - add dentry
*/
static int mds_reint_link_to_remote(struct mds_update_record *rec,
int offset, struct ptlrpc_request *req,
struct lustre_handle *lh)
{
struct lustre_handle *handle = NULL, tgt_dir_lockh[2] = {{0}, {0}};
struct obd_device *obd = req->rq_export->exp_obd;
struct dentry *de_tgt_dir = NULL;
struct mds_obd *mds = mds_req2mds(req);
int rc = 0, cleanup_phase = 0;
struct mdc_op_data op_data;
struct ptlrpc_request *request = NULL;
int update_mode;
ENTRY;
#define fmt "%s: request to link %u/%u/%u:%*s to foreign inode %u/%u/%u\n"
DEBUG_REQ(D_INODE, req, fmt, obd->obd_name,
(unsigned) rec->ur_fid2->mds,
(unsigned) rec->ur_fid2->id,
(unsigned) rec->ur_fid2->generation,
rec->ur_namelen - 1, rec->ur_name,
(unsigned) rec->ur_fid1->mds,
(unsigned) rec->ur_fid1->id,
(unsigned)rec->ur_fid1->generation);
de_tgt_dir = mds_fid2locked_dentry(obd, rec->ur_fid2, NULL, LCK_EX,
tgt_dir_lockh, &update_mode,
rec->ur_name, rec->ur_namelen - 1,
MDS_INODELOCK_UPDATE);
if (IS_ERR(de_tgt_dir))
GOTO(cleanup, rc = PTR_ERR(de_tgt_dir));
cleanup_phase = 1;
op_data.fid1 = *(rec->ur_fid1);
op_data.namelen = 0;
op_data.name = NULL;
rc = md_link(mds->mds_lmv_exp, &op_data, &request);
if (rc)
GOTO(cleanup, rc);
cleanup_phase = 2;
if (request)
ptlrpc_req_finished(request);
OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_tgt_dir->d_inode->i_sb);
handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
if (IS_ERR(handle)) {
rc = PTR_ERR(handle);
GOTO(cleanup, rc);
}
rc = fsfilt_add_dir_entry(obd, de_tgt_dir, rec->ur_name,
rec->ur_namelen - 1, rec->ur_fid1->id,
rec->ur_fid1->generation, rec->ur_fid1->mds);
cleanup_phase = 3;
cleanup:
rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
handle, req, rc, 0);
EXIT;
switch (cleanup_phase) {
case 3:
if (rc) { /* FIXME: drop i_nlink on remote inode here */
CERROR("MUST drop drop i_nlink here\n");
}
case 2:
case 1:
if (rc) {
ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
#ifdef S_PDIROPS
ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
#endif
} else {
ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
#ifdef S_PDIROPS
ptlrpc_save_lock(req, tgt_dir_lockh+1, update_mode);
#endif
}
l_dput(de_tgt_dir);
break;
default:
CERROR("invalid cleanup_phase %d\n", cleanup_phase);
LBUG();
}
req->rq_status = rc;
return 0;
}
static int mds_reint_link(struct mds_update_record *rec, int offset,
struct ptlrpc_request *req,
struct lustre_handle *lh)
{
struct obd_device *obd = req->rq_export->exp_obd;
struct dentry *de_src = NULL;
struct dentry *de_tgt_dir = NULL;
struct dentry *dchild = NULL;
struct mds_obd *mds = mds_req2mds(req);
struct lustre_handle *handle = NULL;
struct lustre_handle tgt_dir_lockh[2] = {{0}, {0}}, src_lockh = {0};
struct ldlm_res_id src_res_id = { .name = {0} };
struct ldlm_res_id tgt_dir_res_id = { .name = {0} };
ldlm_policy_data_t src_policy ={.l_inodebits = {MDS_INODELOCK_UPDATE}};
ldlm_policy_data_t tgt_dir_policy =
{.l_inodebits = {MDS_INODELOCK_UPDATE}};
int rc = 0, cleanup_phase = 0;
int update_mode = 0;
ENTRY;
LASSERT(offset == 0);
DEBUG_REQ(D_INODE, req, "original "LPU64"/%u to "LPU64"/%u %s",
rec->ur_fid1->id, rec->ur_fid1->generation,
rec->ur_fid2->id, rec->ur_fid2->generation, rec->ur_name);
MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
// memset(tgt_dir_lockh, 0, 2*sizeof(tgt_dir_lockh[0]));
if (OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK))
GOTO(cleanup, rc = -ENOENT);
if (rec->ur_fid1->mds != mds->mds_num) {
rc = mds_reint_link_to_remote(rec, offset, req, lh);
RETURN(rc);
}
if (rec->ur_namelen == 1) {
rc = mds_reint_link_acquire(rec, offset, req, lh);
RETURN(rc);
}
/* Step 1: Lookup the source inode and target directory by FID */
de_src = mds_fid2dentry(mds, rec->ur_fid1, NULL); if (IS_ERR(de_src))
GOTO(cleanup, rc = PTR_ERR(de_src));
cleanup_phase = 1; /* source dentry */
de_tgt_dir = mds_fid2dentry(mds, rec->ur_fid2, NULL);
if (IS_ERR(de_tgt_dir)) {
rc = PTR_ERR(de_tgt_dir);
de_tgt_dir = NULL;
GOTO(cleanup, rc);
}
cleanup_phase = 2; /* target directory dentry */
CDEBUG(D_INODE, "linking %*s/%s to inode %lu\n",
de_tgt_dir->d_name.len, de_tgt_dir->d_name.name, rec->ur_name,
de_src->d_inode->i_ino);
/* Step 2: Take the two locks */
src_res_id.name[0] = de_src->d_inode->i_ino;
src_res_id.name[1] = de_src->d_inode->i_generation;
tgt_dir_res_id.name[0] = de_tgt_dir->d_inode->i_ino;
tgt_dir_res_id.name[1] = de_tgt_dir->d_inode->i_generation;
#ifdef S_PDIROPS
if (IS_PDIROPS(de_tgt_dir->d_inode)) {
int flags = 0;
update_mode = mds_lock_mode_for_dir(obd, de_tgt_dir, LCK_EX);
if (update_mode) {
rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
tgt_dir_res_id, LDLM_IBITS,
&src_policy, update_mode, &flags,
mds_blocking_ast,
ldlm_completion_ast, NULL, NULL,
NULL, 0, NULL, tgt_dir_lockh + 1);
if (rc != ELDLM_OK)
GOTO(cleanup, rc = -ENOLCK);
}
tgt_dir_res_id.name[2] = full_name_hash(rec->ur_name,
rec->ur_namelen - 1);
CDEBUG(D_INFO, "take lock on %lu:%u:"LPX64"\n",
de_tgt_dir->d_inode->i_ino,
de_tgt_dir->d_inode->i_generation,
tgt_dir_res_id.name[2]);
}
#endif
rc = enqueue_ordered_locks(obd, &src_res_id, &src_lockh, LCK_EX,
&src_policy,
&tgt_dir_res_id, tgt_dir_lockh, LCK_EX,
&tgt_dir_policy);
if (rc)
GOTO(cleanup, rc);
cleanup_phase = 3; /* locks */
/* Step 3: Lookup the child */
dchild = ll_lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen-1);
if (IS_ERR(dchild)) {
rc = PTR_ERR(dchild);
if (rc != -EPERM && rc != -EACCES)
CERROR("child lookup error %d\n", rc);
GOTO(cleanup, rc);
}
cleanup_phase = 4; /* child dentry */
if (dchild->d_inode) {
CDEBUG(D_INODE, "child exists (dir %lu, name %s)\n",
de_tgt_dir->d_inode->i_ino, rec->ur_name);
rc = -EEXIST; GOTO(cleanup, rc);
}
/* Step 4: Do it. */
OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE, de_src->d_inode->i_sb);
handle = fsfilt_start(obd, de_tgt_dir->d_inode, FSFILT_OP_LINK, NULL);
if (IS_ERR(handle)) {
rc = PTR_ERR(handle);
GOTO(cleanup, rc);
}
rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
if (rc && rc != -EPERM && rc != -EACCES)
CERROR("vfs_link error %d\n", rc);
cleanup:
rc = mds_finish_transno(mds, de_tgt_dir ? de_tgt_dir->d_inode : NULL,
handle, req, rc, 0);
EXIT;
switch (cleanup_phase) {
case 4: /* child dentry */
l_dput(dchild);
case 3: /* locks */
if (rc) {
ldlm_lock_decref(&src_lockh, LCK_EX);
ldlm_lock_decref(tgt_dir_lockh, LCK_EX);
} else {
ptlrpc_save_lock(req, &src_lockh, LCK_EX);
ptlrpc_save_lock(req, tgt_dir_lockh, LCK_EX);
}
case 2: /* target dentry */
#ifdef S_PDIROPS
if (tgt_dir_lockh[1].cookie && update_mode)
ldlm_lock_decref(tgt_dir_lockh + 1, update_mode);
#endif
if (de_tgt_dir)
l_dput(de_tgt_dir);
case 1: /* source dentry */
l_dput(de_src);
case 0:
break;
default:
CERROR("invalid cleanup_phase %d\n", cleanup_phase);
LBUG();
}
req->rq_status = rc;
return 0;
}
/*
* add a hard link in the PENDING directory, only used by rename()
*/
static int mds_add_link_orphan(struct mds_update_record *rec,
struct obd_device *obd,
struct dentry *dentry)
{
struct mds_obd *mds = &obd->u.mds;
struct inode *pending_dir = mds->mds_pending_dir->d_inode;
struct dentry *pending_child;
char fidname[LL_FID_NAMELEN];
int fidlen = 0, rc;
ENTRY;
LASSERT(dentry->d_inode);
LASSERT(!mds_inode_is_orphan(dentry->d_inode));
down(&pending_dir->i_sem);
fidlen = ll_fid2str(fidname, dentry->d_inode->i_ino,
dentry->d_inode->i_generation);
CDEBUG(D_ERROR, "pending destroy of %dx open file %s = %s\n",
mds_open_orphan_count(dentry->d_inode),
rec->ur_name, fidname);
pending_child = lookup_one_len(fidname, mds->mds_pending_dir, fidlen);
if (IS_ERR(pending_child))
GOTO(out_lock, rc = PTR_ERR(pending_child));
if (pending_child->d_inode != NULL) {
CERROR("re-destroying orphan file %s?\n", rec->ur_name);
LASSERT(pending_child->d_inode == dentry->d_inode);
GOTO(out_dput, rc = 0);
}
lock_kernel();
rc = vfs_link(dentry, pending_dir, pending_child);
unlock_kernel();
if (rc)
CERROR("error addlink orphan %s to PENDING: rc = %d\n",
rec->ur_name, rc);
else
mds_inode_set_orphan(dentry->d_inode);
out_dput:
l_dput(pending_child);
out_lock:
up(&pending_dir->i_sem);
RETURN(rc);
}
/* The idea here is that we need to get four locks in the end:
* one on each parent directory, one on each child. We need to take
* these locks in some kind of order (to avoid deadlocks), and the order
* I selected is "increasing resource number" order. We need to look up
* the children, however, before we know what the resource number(s) are.
* Thus the following plan:
*
* 1,2. Look up the parents
* 3,4. Look up the children
* 5. Take locks on the parents and children, in order
* 6. Verify that the children haven't changed since they were looked up
*
* If there was a race and the children changed since they were first looked
* up, it is possible that mds_verify_child() will be able to just grab the
* lock on the new child resource (if it has a higher resource than any other)
* but we need to compare against not only its parent, but also against the
* parent and child of the "other half" of the rename, hence maxres_{src,tgt}.
*
* We need the fancy igrab() on the child inodes because we aren't holding a
* lock on the parent after the lookup is done, so dentry->d_inode may change
* at any time, and igrab() itself doesn't like getting passed a NULL argument.
*/
static int mds_get_parents_children_locked(struct obd_device *obd,
struct mds_obd *mds,
struct ll_fid *p1_fid,
struct dentry **de_srcdirp,
struct ll_fid *p2_fid,
struct dentry **de_tgtdirp,
int parent_mode,
const char *old_name, int old_len,
struct dentry **de_oldp,
const char *new_name, int new_len,
struct dentry **de_newp,
struct lustre_handle *dlm_handles,
int child_mode)
{
struct ldlm_res_id p1_res_id = { .name = {0} };
struct ldlm_res_id p2_res_id = { .name = {0} };
struct ldlm_res_id c1_res_id = { .name = {0} };
struct ldlm_res_id c2_res_id = { .name = {0} }; ldlm_policy_data_t p_policy = {.l_inodebits = {MDS_INODELOCK_UPDATE}};
/* Only dentry should change, but the inode itself would be
intact otherwise */
ldlm_policy_data_t c1_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP}};
/* If something is going to be replaced, both dentry and inode locks are
needed */
ldlm_policy_data_t c2_policy = {.l_inodebits = {MDS_INODELOCK_LOOKUP|
MDS_INODELOCK_UPDATE}};
struct ldlm_res_id *maxres_src, *maxres_tgt;
struct inode *inode;
int rc = 0, cleanup_phase = 0;
ENTRY;
/* Step 1: Lookup the source directory */
*de_srcdirp = mds_fid2dentry(mds, p1_fid, NULL);
if (IS_ERR(*de_srcdirp))
GOTO(cleanup, rc = PTR_ERR(*de_srcdirp));
cleanup_phase = 1; /* source directory dentry */
p1_res_id.name[0] = (*de_srcdirp)->d_inode->i_ino;
p1_res_id.name[1] = (*de_srcdirp)->d_inode->i_generation;
/* Step 2: Lookup the target directory */
if (memcmp(p1_fid, p2_fid, sizeof(*p1_fid)) == 0) {
*de_tgtdirp = dget(*de_srcdirp);
} else {
*de_tgtdirp = mds_fid2dentry(mds, p2_fid, NULL);
if (IS_ERR(*de_tgtdirp)) {
rc = PTR_ERR(*de_tgtdirp);
*de_tgtdirp = NULL;
GOTO(cleanup, rc);
}
}
cleanup_phase = 2; /* target directory dentry */
p2_res_id.name[0] = (*de_tgtdirp)->d_inode->i_ino;
p2_res_id.name[1] = (*de_tgtdirp)->d_inode->i_generation;
#ifdef S_PDIROPS
dlm_handles[5].cookie = 0;
dlm_handles[6].cookie = 0;
if (IS_PDIROPS((*de_srcdirp)->d_inode)) {
/* Get a temp lock on just ino, gen to flush client cache and
* to protect dirs from concurrent splitting */
rc = enqueue_ordered_locks(obd, &p1_res_id, &(dlm_handles[5]),
LCK_PW, &p_policy, &p2_res_id,
&(dlm_handles[6]),LCK_PW,&p_policy);
if (rc != ELDLM_OK)
GOTO(cleanup, rc);
p1_res_id.name[2] = full_name_hash(old_name, old_len - 1);
p2_res_id.name[2] = full_name_hash(new_name, new_len - 1);
CDEBUG(D_INFO, "take locks on %lu:%u:"LPX64", %lu:%u:"LPX64"\n",
(*de_srcdirp)->d_inode->i_ino,
(*de_srcdirp)->d_inode->i_generation, p1_res_id.name[2],
(*de_tgtdirp)->d_inode->i_ino,
(*de_tgtdirp)->d_inode->i_generation, p2_res_id.name[2]);
}
cleanup_phase = 3;
#endif
/* Step 3: Lookup the source child entry */
*de_oldp = ll_lookup_one_len(old_name, *de_srcdirp, old_len - 1);
if (IS_ERR(*de_oldp)) {
rc = PTR_ERR(*de_oldp);
CERROR("old child lookup error (%*s): %d\n",
old_len - 1, old_name, rc);
GOTO(cleanup, rc);
}
cleanup_phase = 4; /* original name dentry */
inode = (*de_oldp)->d_inode;
if (inode != NULL) {
inode = igrab(inode);
if (inode == NULL)
GOTO(cleanup, rc = -ENOENT);
c1_res_id.name[0] = inode->i_ino;
c1_res_id.name[1] = inode->i_generation;
iput(inode);
} else if ((*de_oldp)->d_flags & DCACHE_CROSS_REF) {
c1_res_id.name[0] = (*de_oldp)->d_inum;
c1_res_id.name[1] = (*de_oldp)->d_generation;
}
/* Step 4: Lookup the target child entry */
*de_newp = ll_lookup_one_len(new_name, *de_tgtdirp, new_len - 1);
if (IS_ERR(*de_newp)) {
rc = PTR_ERR(*de_newp);
CERROR("new child lookup error (%*s): %d\n",
old_len - 1, old_name, rc);
GOTO(cleanup, rc);
}
cleanup_phase = 5; /* target dentry */
inode = (*de_newp)->d_inode;
if (inode != NULL) {
inode = igrab(inode);
if (inode == NULL)
goto retry_locks;
c2_res_id.name[0] = inode->i_ino;
c2_res_id.name[1] = inode->i_generation;
iput(inode);
} else if ((*de_newp)->d_flags & DCACHE_CROSS_REF) {
c2_res_id.name[0] = (*de_newp)->d_inum;
c2_res_id.name[1] = (*de_newp)->d_generation;
}
retry_locks:
/* Step 5: Take locks on the parents and child(ren) */
maxres_src = &p1_res_id;
maxres_tgt = &p2_res_id;
cleanup_phase = 5; /* target dentry */
if (c1_res_id.name[0] != 0 && res_gt(&c1_res_id, &p1_res_id, NULL,NULL))
maxres_src = &c1_res_id;
if (c2_res_id.name[0] != 0 && res_gt(&c2_res_id, &p2_res_id, NULL,NULL))
maxres_tgt = &c2_res_id;
rc = enqueue_4ordered_locks(obd, &p1_res_id,&dlm_handles[0],parent_mode,
&p_policy,
&p2_res_id, &dlm_handles[1], parent_mode,
&p_policy,
&c1_res_id, &dlm_handles[2], child_mode,
&c1_policy,
&c2_res_id, &dlm_handles[3], child_mode,
&c2_policy);
if (rc)
GOTO(cleanup, rc);
cleanup_phase = 6; /* parent and child(ren) locks */
/* Step 6a: Re-lookup source child to verify it hasn't changed */
rc = mds_verify_child(obd, &p1_res_id, &dlm_handles[0], *de_srcdirp,
parent_mode, &c1_res_id, &dlm_handles[2],
de_oldp, child_mode, &c1_policy, old_name,old_len, maxres_tgt);
if (rc) {
if (c2_res_id.name[0] != 0)
ldlm_lock_decref(&dlm_handles[3], child_mode);
ldlm_lock_decref(&dlm_handles[1], parent_mode);
cleanup_phase = 5;
if (rc > 0)
goto retry_locks;
GOTO(cleanup, rc);
}
if (!DENTRY_VALID(*de_oldp))
GOTO(cleanup, rc = -ENOENT);
/* Step 6b: Re-lookup target child to verify it hasn't changed */
rc = mds_verify_child(obd, &p2_res_id, &dlm_handles[1], *de_tgtdirp,
parent_mode, &c2_res_id, &dlm_handles[3],
de_newp, child_mode, &c2_policy, new_name,
new_len, maxres_src);
if (rc) {
ldlm_lock_decref(&dlm_handles[2], child_mode);
ldlm_lock_decref(&dlm_handles[0], parent_mode);
cleanup_phase = 5;
if (rc > 0)
goto retry_locks;
GOTO(cleanup, rc);
}
EXIT;
cleanup:
if (rc) {
switch (cleanup_phase) {
case 6: /* child lock(s) */
if (c2_res_id.name[0] != 0)
ldlm_lock_decref(&dlm_handles[3], child_mode);
if (c1_res_id.name[0] != 0)
ldlm_lock_decref(&dlm_handles[2], child_mode);
ldlm_lock_decref(&dlm_handles[1], parent_mode);
ldlm_lock_decref(&dlm_handles[0], parent_mode);
case 5: /* target dentry */
l_dput(*de_newp);
case 4: /* source dentry */
l_dput(*de_oldp);
case 3:
#ifdef S_PDIROPS
if (dlm_handles[5].cookie != 0)
ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
if (dlm_handles[6].cookie != 0)
ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
#endif
case 2: /* target directory dentry */
l_dput(*de_tgtdirp);
case 1: /* source directry dentry */
l_dput(*de_srcdirp);
}
}
return rc;
}
static int mds_reint_rename_create_name(struct mds_update_record *rec,
int offset, struct ptlrpc_request *req)
{
struct obd_device *obd = req->rq_export->exp_obd;
struct dentry *de_srcdir = NULL;
struct dentry *de_new = NULL;
struct mds_obd *mds = mds_req2mds(req);
struct lustre_handle parent_lockh[2] = {{0}, {0}};
struct lustre_handle child_lockh = {0};
int cleanup_phase = 0; void *handle = NULL;
int update_mode, rc = 0;
ENTRY;
/* another MDS executing rename operation has asked us
* to create target name. such a creation should destroy
* existing target name */
CDEBUG(D_OTHER, "%s: request to create name %s for %lu/%lu/%lu\n",
obd->obd_name, rec->ur_tgt,
(unsigned long) rec->ur_fid1->mds,
(unsigned long) rec->ur_fid1->id,
(unsigned long) rec->ur_fid1->generation);
/* first, lookup the target */
child_lockh.cookie = 0;
rc = mds_get_parent_child_locked(obd, mds, rec->ur_fid2, parent_lockh,
&de_srcdir,LCK_PW,MDS_INODELOCK_UPDATE,
&update_mode, rec->ur_tgt, rec->ur_tgtlen,
&child_lockh, &de_new, LCK_EX,
MDS_INODELOCK_LOOKUP, NULL);
if (rc)
GOTO(cleanup, rc);
cleanup_phase = 1;
LASSERT(de_srcdir);
LASSERT(de_srcdir->d_inode);
LASSERT(de_new);
if (de_new->d_inode) {
/* name exists and points to local inode
* try to unlink this name and create new one */
CERROR("%s: %s points to local inode %lu/%lu\n",
obd->obd_name, rec->ur_tgt,
(unsigned long) de_new->d_inode->i_ino,
(unsigned long) de_new->d_inode->i_generation);
handle = fsfilt_start(obd, de_srcdir->d_inode,
FSFILT_OP_RENAME, NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
rc = fsfilt_del_dir_entry(req->rq_export->exp_obd, de_new);
if (rc)
GOTO(cleanup, rc);
} else if (de_new->d_flags & DCACHE_CROSS_REF) {
/* name exists adn points to remove inode */
CERROR("%s: %s points to remote inode %lu/%lu/%lu\n",
obd->obd_name, rec->ur_tgt,
(unsigned long) de_new->d_mdsnum,
(unsigned long) de_new->d_inum,
(unsigned long) de_new->d_generation);
} else {
/* name doesn't exist. the simplest case */
handle = fsfilt_start(obd, de_srcdir->d_inode,
FSFILT_OP_LINK, NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
}
cleanup_phase = 2;
rc = fsfilt_add_dir_entry(obd, de_srcdir, rec->ur_tgt,
rec->ur_tgtlen - 1, rec->ur_fid1->id,
rec->ur_fid1->generation, rec->ur_fid1->mds);
if (rc)
CERROR("add_dir_entry() returned error %d\n", rc);
cleanup:
EXIT;
rc = mds_finish_transno(mds, de_srcdir ? de_srcdir->d_inode : NULL,
handle, req, rc, 0);
switch(cleanup_phase) { case 2:
case 1:
#ifdef S_PDIROPS
if (parent_lockh[1].cookie != 0)
ldlm_lock_decref(&parent_lockh[1], update_mode);
#endif
ldlm_lock_decref(&parent_lockh[0], LCK_PW);
if (child_lockh.cookie != 0)
ldlm_lock_decref(&child_lockh, LCK_EX);
l_dput(de_new);
l_dput(de_srcdir);
break;
default:
LBUG();
}
req->rq_status = rc;
RETURN(0);
}
static int mds_reint_rename_to_remote(struct mds_update_record *rec, int offset,
struct ptlrpc_request *req)
{
struct obd_device *obd = req->rq_export->exp_obd;
struct ptlrpc_request *req2 = NULL;
struct dentry *de_srcdir = NULL;
struct dentry *de_old = NULL;
struct mds_obd *mds = mds_req2mds(req);
struct lustre_handle parent_lockh[2] = {{0}, {0}};
struct lustre_handle child_lockh = {0};
struct mdc_op_data opdata;
void *handle = NULL;
int update_mode, rc = 0;
ENTRY;
CDEBUG(D_OTHER, "%s: move name %s onto another mds%u\n",
obd->obd_name, rec->ur_name, rec->ur_fid2->mds + 1);
memset(&opdata, 0, sizeof(opdata));
child_lockh.cookie = 0;
rc = mds_get_parent_child_locked(obd, mds, rec->ur_fid1, parent_lockh,
&de_srcdir,LCK_PW,MDS_INODELOCK_UPDATE,
&update_mode, rec->ur_name,
rec->ur_namelen, &child_lockh, &de_old,
LCK_EX, MDS_INODELOCK_LOOKUP, NULL);
LASSERT(rc == 0);
LASSERT(de_srcdir);
LASSERT(de_srcdir->d_inode);
LASSERT(de_old);
/* we already know the target should be created on another MDS
* so, we have to request that MDS to do it */
/* prepare source fid */
if (de_old->d_flags & DCACHE_CROSS_REF) {
LASSERT(de_old->d_inode == NULL);
CDEBUG(D_OTHER, "request to move remote name\n");
opdata.fid1.mds = de_old->d_mdsnum;
opdata.fid1.id = de_old->d_inum;
opdata.fid1.generation = de_old->d_generation;
} else if (de_old->d_inode == NULL) {
/* oh, source doesn't exist */
GOTO(cleanup, rc = -ENOENT);
} else {
LASSERT(de_old->d_inode != NULL);
CDEBUG(D_OTHER, "request to move local name\n");
opdata.fid1.mds = mds->mds_num;
opdata.fid1.id = de_old->d_inode->i_ino;
opdata.fid1.generation = de_old->d_inode->i_generation; }
opdata.fid2 = *(rec->ur_fid2);
rc = md_rename(mds->mds_lmv_exp, &opdata, NULL, 0, rec->ur_tgt,
rec->ur_tgtlen - 1, &req2);
if (rc)
GOTO(cleanup, rc);
handle = fsfilt_start(obd, de_srcdir->d_inode, FSFILT_OP_UNLINK, NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
rc = fsfilt_del_dir_entry(obd, de_old);
d_drop(de_old);
cleanup:
EXIT;
rc = mds_finish_transno(mds, de_srcdir ? de_srcdir->d_inode : NULL,
handle, req, rc, 0);
if (req2)
ptlrpc_req_finished(req2);
#ifdef S_PDIROPS
if (parent_lockh[1].cookie != 0)
ldlm_lock_decref(&parent_lockh[1], update_mode);
#endif
ldlm_lock_decref(&parent_lockh[0], LCK_PW);
if (child_lockh.cookie != 0)
ldlm_lock_decref(&child_lockh, LCK_EX);
l_dput(de_old);
l_dput(de_srcdir);
req->rq_status = rc;
RETURN(0);
}
static int mds_reint_rename(struct mds_update_record *rec, int offset,
struct ptlrpc_request *req, struct lustre_handle *lockh)
{
struct obd_device *obd = req->rq_export->exp_obd;
struct dentry *de_srcdir = NULL;
struct dentry *de_tgtdir = NULL;
struct dentry *de_old = NULL;
struct dentry *de_new = NULL;
struct mds_obd *mds = mds_req2mds(req);
struct lustre_handle dlm_handles[7] = {{0},{0},{0},{0},{0},{0},{0}};
struct mds_body *body = NULL;
int rc = 0, lock_count = 3;
int cleanup_phase = 0;
void *handle = NULL;
ENTRY;
LASSERT(offset == 0);
DEBUG_REQ(D_INODE, req, "parent "LPU64"/%u %s to "LPU64"/%u %s",
rec->ur_fid1->id, rec->ur_fid1->generation, rec->ur_name,
rec->ur_fid2->id, rec->ur_fid2->generation, rec->ur_tgt);
MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
if (rec->ur_namelen == 1) {
rc = mds_reint_rename_create_name(rec, offset, req);
RETURN(rc);
}
if (rec->ur_fid2->mds != mds->mds_num) {
rc = mds_reint_rename_to_remote(rec, offset, req);
RETURN(rc); }
rc = mds_get_parents_children_locked(obd, mds, rec->ur_fid1, &de_srcdir,
rec->ur_fid2, &de_tgtdir, LCK_PW,
rec->ur_name, rec->ur_namelen,
&de_old, rec->ur_tgt,
rec->ur_tgtlen, &de_new,
dlm_handles, LCK_EX);
if (rc)
GOTO(cleanup, rc);
cleanup_phase = 1; /* parent(s), children, locks */
if (de_new->d_inode)
lock_count = 4;
/* sanity check for src inode */
if (de_old->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
de_old->d_inode->i_ino == de_tgtdir->d_inode->i_ino)
GOTO(cleanup, rc = -EINVAL);
/* sanity check for dest inode */
if (de_new->d_inode &&
(de_new->d_inode->i_ino == de_srcdir->d_inode->i_ino ||
de_new->d_inode->i_ino == de_tgtdir->d_inode->i_ino))
GOTO(cleanup, rc = -EINVAL);
if (de_old->d_inode == de_new->d_inode)
GOTO(cleanup, rc = 0);
/* if we are about to remove the target at first, pass the EA of
* that inode to client to perform and cleanup on OST */
body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
LASSERT(body != NULL);
if (de_new->d_inode &&
S_ISREG(de_new->d_inode->i_mode) &&
de_new->d_inode->i_nlink == 1 &&
mds_open_orphan_count(de_new->d_inode) == 0) {
mds_pack_inode2fid(obd, &body->fid1, de_new->d_inode);
mds_pack_inode2body(obd, body, de_new->d_inode);
mds_pack_md(obd, req->rq_repmsg, 1, body, de_new->d_inode, 1);
if (!(body->valid & OBD_MD_FLEASIZE)) {
body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
OBD_MD_FLATIME | OBD_MD_FLMTIME);
} else {
/* XXX need log unlink? */
}
}
OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
de_srcdir->d_inode->i_sb);
handle = fsfilt_start(obd, de_tgtdir->d_inode, FSFILT_OP_RENAME, NULL);
if (IS_ERR(handle))
GOTO(cleanup, rc = PTR_ERR(handle));
/* FIXME need adjust the journal block count? */
/* if the target should be moved to PENDING, we at first increase the
* link and later vfs_rename() will decrease the link count again */
if (de_new->d_inode &&
S_ISREG(de_new->d_inode->i_mode) &&
de_new->d_inode->i_nlink == 1 &&
mds_open_orphan_count(de_new->d_inode) > 0) {
rc = mds_add_link_orphan(rec, obd, de_new);
if (rc)
GOTO(cleanup, rc);
}
lock_kernel(); de_old->d_fsdata = req;
de_new->d_fsdata = req;
rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
unlock_kernel();
GOTO(cleanup, rc);
cleanup:
rc = mds_finish_transno(mds, de_tgtdir ? de_tgtdir->d_inode : NULL,
handle, req, rc, 0);
switch (cleanup_phase) {
case 1:
#ifdef S_PDIROPS
if (dlm_handles[5].cookie != 0)
ldlm_lock_decref(&(dlm_handles[5]), LCK_PW);
if (dlm_handles[6].cookie != 0)
ldlm_lock_decref(&(dlm_handles[6]), LCK_PW);
#endif
if (rc) {
if (lock_count == 4)
ldlm_lock_decref(&(dlm_handles[3]), LCK_EX);
ldlm_lock_decref(&(dlm_handles[2]), LCK_EX);
ldlm_lock_decref(&(dlm_handles[1]), LCK_PW);
ldlm_lock_decref(&(dlm_handles[0]), LCK_PW);
} else {
if (lock_count == 4)
ptlrpc_save_lock(req,&(dlm_handles[3]), LCK_EX);
ptlrpc_save_lock(req, &(dlm_handles[2]), LCK_EX);
ptlrpc_save_lock(req, &(dlm_handles[1]), LCK_PW);
ptlrpc_save_lock(req, &(dlm_handles[0]), LCK_PW);
}
l_dput(de_new);
l_dput(de_old);
l_dput(de_tgtdir);
l_dput(de_srcdir);
case 0:
break;
default:
CERROR("invalid cleanup_phase %d\n", cleanup_phase);
LBUG();
}
req->rq_status = rc;
return 0;
}
typedef int (*mds_reinter)(struct mds_update_record *, int offset,
struct ptlrpc_request *, struct lustre_handle *);
static mds_reinter reinters[REINT_MAX + 1] = {
[REINT_SETATTR] mds_reint_setattr,
[REINT_CREATE] mds_reint_create,
[REINT_LINK] mds_reint_link,
[REINT_UNLINK] mds_reint_unlink,
[REINT_RENAME] mds_reint_rename,
[REINT_OPEN] mds_open
};
int mds_reint_rec(struct mds_update_record *rec, int offset,
struct ptlrpc_request *req, struct lustre_handle *lockh)
{
struct obd_device *obd = req->rq_export->exp_obd;
struct lvfs_run_ctxt saved;
int rc;
/* checked by unpacker */
LASSERT(rec->ur_opcode <= REINT_MAX &&
reinters[rec->ur_opcode] != NULL);
push_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
rc = reinters[rec->ur_opcode] (rec, offset, req, lockh);
pop_ctxt(&saved, &obd->obd_lvfs_ctxt, &rec->ur_uc);
return rc;
}