+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (c) 2003 Cluster File Systems, Inc.
- * Author: Peter Braam <braam@clusterfs.com>
- * Author: Andreas Dilger <adilger@clusterfs.com>
- * Author: Phil Schwan <phil@clusterfs.com>
- * Author: Mike Shaver <shaver@clusterfs.com>
- *
- * This file is part of the Lustre file system, http://www.lustre.org
- * Lustre is a trademark of Cluster File Systems, Inc.
- *
- * You may have signed or agreed to another license before downloading
- * this software. If so, you are bound by the terms and conditions
- * of that agreement, and the following does not apply to you. See the
- * LICENSE file included with this distribution for more information.
- *
- * If you did not agree to a different license, then this copy of Lustre
- * is open source 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.
- *
- * In either case, 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
- * license text for more details.
- */
-
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-#define DEBUG_SUBSYSTEM S_MDS
-
-#include <linux/version.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/version.h>
-#include <linux/buffer_head.h>
-#include <linux/workqueue.h>
-
-#include <obd_class.h>
-#include <obd_lov.h>
-#include <lustre_fsfilt.h>
-#include <lprocfs_status.h>
-
-#include "mds_internal.h"
-
-/* Exported function from this file are:
- *
- * mds_open - called by the intent handler
- * mds_close - an rpc handling function
- * mds_pin - an rpc handling function - which will go away
- * mds_mfd_close - for force closing files when a client dies
- */
-
-/*
- * MDS file data handling: file data holds a handle for a file opened
- * by a client.
- */
-
-static void mds_mfd_addref(void *mfdp)
-{
- struct mds_file_data *mfd = mfdp;
-
- atomic_inc(&mfd->mfd_refcount);
- CDEBUG(D_INFO, "GETting mfd %p : new refcount %d\n", mfd,
- atomic_read(&mfd->mfd_refcount));
-}
-
-/* Create a new mds_file_data struct.
- * One reference for handle+med_open_head list and dropped by mds_mfd_unlink(),
- * one reference for the caller of this function. */
-struct mds_file_data *mds_mfd_new(void)
-{
- struct mds_file_data *mfd;
-
- OBD_ALLOC(mfd, sizeof *mfd);
- if (mfd == NULL) {
- CERROR("mds: out of memory\n");
- return NULL;
- }
-
- atomic_set(&mfd->mfd_refcount, 2);
-
- CFS_INIT_LIST_HEAD(&mfd->mfd_handle.h_link);
- CFS_INIT_LIST_HEAD(&mfd->mfd_list);
- class_handle_hash(&mfd->mfd_handle, mds_mfd_addref);
-
- return mfd;
-}
-
-/* Get a new reference on the mfd pointed to by handle, if handle is still
- * valid. Caller must drop reference with mds_mfd_put(). */
-static struct mds_file_data *mds_handle2mfd(struct lustre_handle *handle)
-{
- ENTRY;
- LASSERT(handle != NULL);
- RETURN(class_handle2object(handle->cookie));
-}
-
-/* Drop mfd reference, freeing struct if this is the last one. */
-static void mds_mfd_put(struct mds_file_data *mfd)
-{
- CDEBUG(D_INFO, "PUTting mfd %p : new refcount %d\n", mfd,
- atomic_read(&mfd->mfd_refcount) - 1);
- LASSERT(atomic_read(&mfd->mfd_refcount) > 0 &&
- atomic_read(&mfd->mfd_refcount) < 0x5a5a);
- if (atomic_dec_and_test(&mfd->mfd_refcount)) {
- OBD_FREE_RCU(mfd, sizeof *mfd, &mfd->mfd_handle);
- }
-}
-
-/* Remove the mfd handle so that it cannot be found by open/close again.
- * Caller must hold med_open_lock for mfd_list manipulation. */
-void mds_mfd_unlink(struct mds_file_data *mfd, int decref)
-{
- class_handle_unhash(&mfd->mfd_handle);
- list_del_init(&mfd->mfd_list);
- if (decref)
- mds_mfd_put(mfd);
-}
-
-/* Caller must hold mds->mds_epoch_sem */
-static int mds_alloc_filterdata(struct inode *inode)
-{
- LASSERT(inode->i_filterdata == NULL);
- OBD_ALLOC(inode->i_filterdata, sizeof(struct mds_filter_data));
- if (inode->i_filterdata == NULL)
- return -ENOMEM;
- LASSERT(igrab(inode) == inode);
- return 0;
-}
-
-/* Caller must hold mds->mds_epoch_sem */
-static void mds_free_filterdata(struct inode *inode)
-{
- LASSERT(inode->i_filterdata != NULL);
- OBD_FREE(inode->i_filterdata, sizeof(struct mds_filter_data));
- inode->i_filterdata = NULL;
- iput(inode);
-}
-
-/* Write access to a file: executors cause a negative count,
- * writers a positive count. The semaphore is needed to perform
- * a check for the sign and then increment or decrement atomically.
- *
- * This code is closely tied to the allocation of the d_fsdata and the
- * MDS epoch, so we use the same semaphore for the whole lot.
- *
- * We could use a different semaphore for each file, if it ever shows
- * up in a profile, which it won't.
- *
- * epoch argument is nonzero during recovery */
-static int mds_get_write_access(struct mds_obd *mds, struct inode *inode,
- __u64 epoch)
-{
- int rc = 0;
-
- down(&mds->mds_epoch_sem);
-
- if (atomic_read(&inode->i_writecount) < 0) {
- up(&mds->mds_epoch_sem);
- RETURN(-ETXTBSY);
- }
-
-
- if (MDS_FILTERDATA(inode) && MDS_FILTERDATA(inode)->io_epoch != 0) {
- CDEBUG(D_INODE, "continuing MDS epoch "LPU64" for ino %lu/%u\n",
- MDS_FILTERDATA(inode)->io_epoch, inode->i_ino,
- inode->i_generation);
- goto out;
- }
-
- if (inode->i_filterdata == NULL)
- mds_alloc_filterdata(inode);
- if (inode->i_filterdata == NULL) {
- rc = -ENOMEM;
- goto out;
- }
- if (epoch > mds->mds_io_epoch)
- mds->mds_io_epoch = epoch;
- else
- mds->mds_io_epoch++;
- MDS_FILTERDATA(inode)->io_epoch = mds->mds_io_epoch;
- CDEBUG(D_INODE, "starting MDS epoch "LPU64" for ino %lu/%u\n",
- mds->mds_io_epoch, inode->i_ino, inode->i_generation);
- out:
- if (rc == 0)
- atomic_inc(&inode->i_writecount);
- up(&mds->mds_epoch_sem);
- return rc;
-}
-
-/* Returns EAGAIN if the client needs to get size and/or cookies and close
- * again -- which is never true if the file is about to be unlinked. Otherwise
- * returns the number of remaining writers. */
-static int mds_put_write_access(struct mds_obd *mds, struct inode *inode,
- struct mds_body *body, int unlinking)
-{
- int rc = 0;
- ENTRY;
-
- down(&mds->mds_epoch_sem);
- atomic_dec(&inode->i_writecount);
- rc = atomic_read(&inode->i_writecount);
- if (rc > 0)
- GOTO(out, rc);
-#if 0
- if (!unlinking && !(body->valid & OBD_MD_FLSIZE))
- GOTO(out, rc = EAGAIN);
-#endif
- mds_free_filterdata(inode);
- out:
- up(&mds->mds_epoch_sem);
- return rc;
-}
-
-static int mds_deny_write_access(struct mds_obd *mds, struct inode *inode)
-{
- ENTRY;
- down(&mds->mds_epoch_sem);
- if (atomic_read(&inode->i_writecount) > 0) {
- up(&mds->mds_epoch_sem);
- RETURN(-ETXTBSY);
- }
- atomic_dec(&inode->i_writecount);
- up(&mds->mds_epoch_sem);
- RETURN(0);
-}
-
-static void mds_allow_write_access(struct inode *inode)
-{
- ENTRY;
- atomic_inc(&inode->i_writecount);
-}
-
-int mds_query_write_access(struct inode *inode)
-{
- ENTRY;
- RETURN(atomic_read(&inode->i_writecount));
-}
-
-/* This replaces the VFS dentry_open, it manages mfd and writecount */
-static struct mds_file_data *mds_dentry_open(struct dentry *dentry,
- struct vfsmount *mnt, int flags,
- struct ptlrpc_request *req)
-{
- struct mds_export_data *med = &req->rq_export->exp_mds_data;
- struct mds_obd *mds = mds_req2mds(req);
- struct mds_file_data *mfd;
- struct mds_body *body;
- int error;
- ENTRY;
-
- mfd = mds_mfd_new();
- if (mfd == NULL) {
- CERROR("mds: out of memory\n");
- GOTO(cleanup_dentry, error = -ENOMEM);
- }
-
- body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF, sizeof(*body));
-
- if (flags & FMODE_WRITE) {
- /* FIXME: in recovery, need to pass old epoch here */
- error = mds_get_write_access(mds, dentry->d_inode, 0);
- if (error)
- GOTO(cleanup_mfd, error);
- body->io_epoch = MDS_FILTERDATA(dentry->d_inode)->io_epoch;
- } else if (flags & MDS_FMODE_EXEC) {
- error = mds_deny_write_access(mds, dentry->d_inode);
- if (error)
- GOTO(cleanup_mfd, error);
- }
-
- dget(dentry);
-
- /* Mark the file as open to handle open-unlink. */
- MDS_DOWN_WRITE_ORPHAN_SEM(dentry->d_inode);
- mds_orphan_open_inc(dentry->d_inode);
- MDS_UP_WRITE_ORPHAN_SEM(dentry->d_inode);
-
- mfd->mfd_mode = flags;
- mfd->mfd_dentry = dentry;
- mfd->mfd_xid = req->rq_xid;
-
- spin_lock(&med->med_open_lock);
- list_add(&mfd->mfd_list, &med->med_open_head);
- spin_unlock(&med->med_open_lock);
-
- body->handle.cookie = mfd->mfd_handle.h_cookie;
-
- RETURN(mfd);
-
-cleanup_mfd:
- mds_mfd_put(mfd);
- mds_mfd_unlink(mfd, 1);
-cleanup_dentry:
- return ERR_PTR(error);
-}
-
-/* Must be called with i_mutex held */
-static int mds_create_objects(struct ptlrpc_request *req, int offset,
- struct mds_update_record *rec,
- struct mds_obd *mds, struct obd_device *obd,
- struct dentry *dchild, void **handle,
- struct lov_mds_md **objid)
-{
- struct inode *inode = dchild->d_inode;
- struct obd_trans_info oti = { 0 };
- struct lov_mds_md *lmm = NULL;
- int rc, lmm_size;
- struct mds_body *body;
- struct obd_info oinfo = { { { 0 } } };
- void *lmm_buf;
- ENTRY;
-
- if (!S_ISREG(inode->i_mode))
- RETURN(0);
- if (!md_should_create(rec->ur_flags))
- RETURN(0);
-
- body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF, sizeof(*body));
-
- if (body->valid & OBD_MD_FLEASIZE)
- RETURN(0);
-
- oti_init(&oti, req);
-
- /* replay case */
- if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
- if (rec->ur_fid2->id == 0) {
- DEBUG_REQ(D_ERROR, req, "fid2 not set on open replay");
- RETURN(-EFAULT);
- }
-
- body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
- lmm_size = rec->ur_eadatalen;
- lmm = rec->ur_eadata;
- LASSERT(lmm);
-
- if (*handle == NULL)
- *handle = fsfilt_start(obd,inode,FSFILT_OP_CREATE,NULL);
- if (IS_ERR(*handle)) {
- rc = PTR_ERR(*handle);
- *handle = NULL;
- GOTO(out_ids, rc);
- }
-
- rc = fsfilt_set_md(obd, inode, *handle, lmm, lmm_size, "lov");
- if (rc)
- CERROR("open replay failed to set md:%d\n", rc);
- lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, lmm_size);
- LASSERT(lmm_buf);
- memcpy(lmm_buf, lmm, lmm_size);
-
- *objid = lmm_buf;
- RETURN(rc);
- }
-
- if (OBD_FAIL_CHECK(OBD_FAIL_MDS_ALLOC_OBDO))
- GOTO(out_ids, rc = -ENOMEM);
-
- OBDO_ALLOC(oinfo.oi_oa);
- if (oinfo.oi_oa == NULL)
- GOTO(out_ids, rc = -ENOMEM);
- oinfo.oi_oa->o_uid = 0; /* must have 0 uid / gid on OST */
- oinfo.oi_oa->o_gid = 0;
- oinfo.oi_oa->o_mode = S_IFREG | 0600;
- oinfo.oi_oa->o_id = inode->i_ino;
- oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLFLAGS |
- OBD_MD_FLMODE | OBD_MD_FLUID | OBD_MD_FLGID;
- oinfo.oi_oa->o_size = 0;
-
- obdo_from_inode(oinfo.oi_oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
- OBD_MD_FLMTIME | OBD_MD_FLCTIME);
-
- if (!(rec->ur_flags & MDS_OPEN_HAS_OBJS)) {
- /* check if things like lfs setstripe are sending us the ea */
- if (rec->ur_flags & MDS_OPEN_HAS_EA) {
- rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
- mds->mds_osc_exp,
- 0, &oinfo.oi_md, rec->ur_eadata);
- if (rc)
- GOTO(out_oa, rc);
- } else {
- OBD_ALLOC(lmm, mds->mds_max_mdsize);
- if (lmm == NULL)
- GOTO(out_oa, rc = -ENOMEM);
-
- lmm_size = mds->mds_max_mdsize;
- rc = mds_get_md(obd, dchild->d_parent->d_inode,
- lmm, &lmm_size, 1);
- if (rc > 0)
- rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
- mds->mds_osc_exp,
- 0, &oinfo.oi_md, lmm);
- OBD_FREE(lmm, mds->mds_max_mdsize);
- if (rc)
- GOTO(out_oa, rc);
- }
- rc = obd_create(mds->mds_osc_exp, oinfo.oi_oa,
- &oinfo.oi_md, &oti);
- if (rc) {
- int level = D_ERROR;
- if (rc == -ENOSPC)
- level = D_INODE;
- CDEBUG(level, "error creating objects for "
- "inode %lu: rc = %d\n",
- inode->i_ino, rc);
- if (rc > 0) {
- CERROR("obd_create returned invalid "
- "rc %d\n", rc);
- rc = -EIO;
- }
- GOTO(out_oa, rc);
- }
- } else {
- rc = obd_iocontrol(OBD_IOC_LOV_SETEA, mds->mds_osc_exp,
- 0, &oinfo.oi_md, rec->ur_eadata);
- if (rc) {
- GOTO(out_oa, rc);
- }
- oinfo.oi_md->lsm_object_id = oinfo.oi_oa->o_id;
- oinfo.oi_md->lsm_object_gr = oinfo.oi_oa->o_gr;
- }
- if (i_size_read(inode)) {
- oinfo.oi_oa->o_size = i_size_read(inode);
- obdo_from_inode(oinfo.oi_oa, inode, OBD_MD_FLTYPE |
- OBD_MD_FLATIME | OBD_MD_FLMTIME |
- OBD_MD_FLCTIME | OBD_MD_FLSIZE);
-
- /* pack lustre id to OST */
- oinfo.oi_oa->o_fid = body->fid1.id;
- oinfo.oi_oa->o_generation = body->fid1.generation;
- oinfo.oi_oa->o_valid |= OBD_MD_FLFID | OBD_MD_FLGENER;
-
- rc = obd_setattr_rqset(mds->mds_osc_exp, &oinfo, &oti);
- if (rc) {
- CERROR("error setting attrs for inode %lu: rc %d\n",
- inode->i_ino, rc);
- if (rc > 0) {
- CERROR("obd_setattr_async returned bad rc %d\n",
- rc);
- rc = -EIO;
- }
- GOTO(out_oa, rc);
- }
- }
-
- body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
- obdo_refresh_inode(inode, oinfo.oi_oa, OBD_MD_FLBLKSZ);
-
- LASSERT(oinfo.oi_md && oinfo.oi_md->lsm_object_id);
- lmm = NULL;
- rc = obd_packmd(mds->mds_osc_exp, &lmm, oinfo.oi_md);
- if (rc < 0) {
- CERROR("cannot pack lsm, err = %d\n", rc);
- GOTO(out_oa, rc);
- }
- lmm_size = rc;
- body->eadatasize = rc;
-
- if (*handle == NULL)
- *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
- if (IS_ERR(*handle)) {
- rc = PTR_ERR(*handle);
- *handle = NULL;
- GOTO(free_diskmd, rc);
- }
-
- rc = fsfilt_set_md(obd, inode, *handle, lmm, lmm_size, "lov");
- lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, lmm_size);
- LASSERT(lmm_buf);
- memcpy(lmm_buf, lmm, lmm_size);
-
- *objid = lmm_buf; // save for mds_lov_update_objid
-
-free_diskmd:
- obd_free_diskmd(mds->mds_osc_exp, &lmm);
-out_oa:
- oti_free_cookies(&oti);
- OBDO_FREE(oinfo.oi_oa);
-out_ids:
- if (oinfo.oi_md)
- obd_free_memmd(mds->mds_osc_exp, &oinfo.oi_md);
- RETURN(rc);
-}
-
-static void reconstruct_open(struct mds_update_record *rec, int offset,
- struct ptlrpc_request *req,
- struct lustre_handle *child_lockh)
-{
- struct mds_export_data *med = &req->rq_export->exp_mds_data;
- struct mds_client_data *mcd = med->med_mcd;
- struct mds_obd *mds = mds_req2mds(req);
- struct mds_file_data *mfd;
- struct obd_device *obd = req->rq_export->exp_obd;
- struct dentry *parent, *dchild;
- struct ldlm_reply *rep;
- struct mds_body *body;
- int rc;
- struct list_head *t;
- int put_child = 1;
- ENTRY;
-
- LASSERT(offset == DLM_INTENT_REC_OFF); /* only called via intent */
- rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF, sizeof(*rep));
- body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF, sizeof(*body));
-
- /* copy rc, transno and disp; steal locks */
- mds_req_from_mcd(req, mcd);
- intent_set_disposition(rep, le32_to_cpu(mcd->mcd_last_data));
-
- /* Only replay if create or open actually happened. */
- if (!intent_disposition(rep, DISP_OPEN_CREATE | DISP_OPEN_OPEN) ) {
- EXIT;
- return; /* error looking up parent or child */
- }
-
- parent = mds_fid2dentry(mds, rec->ur_fid1, NULL);
- LASSERT(!IS_ERR(parent));
-
- dchild = ll_lookup_one_len(rec->ur_name, parent, rec->ur_namelen - 1);
- LASSERT(!IS_ERR(dchild));
-
- if (!dchild->d_inode)
- GOTO(out_dput, 0); /* child not present to open */
-
- /* At this point, we know we have a child. We'll send
- * it back _unless_ it not created and open failed.
- */
- if (intent_disposition(rep, DISP_OPEN_OPEN) &&
- !intent_disposition(rep, DISP_OPEN_CREATE) &&
- req->rq_status) {
- GOTO(out_dput, 0);
- }
-
- mds_pack_inode2fid(&body->fid1, dchild->d_inode);
- mds_pack_inode2body(body, dchild->d_inode);
- if (S_ISREG(dchild->d_inode->i_mode)) {
- rc = mds_pack_md(obd, req->rq_repmsg, DLM_REPLY_REC_OFF + 1,
- body, dchild->d_inode, 1);
-
- if (rc)
- LASSERT(rc == req->rq_status);
-
- /* If we have LOV EA data, the OST holds size, mtime */
- if (!(body->valid & OBD_MD_FLEASIZE))
- body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
- OBD_MD_FLATIME | OBD_MD_FLMTIME);
- }
-
- if (!(rec->ur_flags & MDS_OPEN_JOIN_FILE))
- lustre_shrink_reply(req, DLM_REPLY_REC_OFF + 1,
- body->eadatasize, 0);
-
- if (req->rq_export->exp_connect_flags & OBD_CONNECT_ACL &&
- !(rec->ur_flags & MDS_OPEN_JOIN_FILE)) {
- int acl_off = DLM_REPLY_REC_OFF + (body->eadatasize ? 2 : 1);
-
- rc = mds_pack_acl(med, dchild->d_inode, req->rq_repmsg,
- body, acl_off);
- lustre_shrink_reply(req, acl_off, body->aclsize, 0);
- if (!req->rq_status && rc)
- req->rq_status = rc;
- }
-
- /* If we have -EEXIST as the status, and we were asked to create
- * exclusively, we can tell we failed because the file already existed.
- */
- if (req->rq_status == -EEXIST &&
- ((rec->ur_flags & (MDS_OPEN_CREAT | MDS_OPEN_EXCL)) ==
- (MDS_OPEN_CREAT | MDS_OPEN_EXCL))) {
- GOTO(out_dput, 0);
- }
-
- /* If we didn't get as far as trying to open, then some locking thing
- * probably went wrong, and we'll just bail here.
- */
- if (!intent_disposition(rep, DISP_OPEN_OPEN))
- GOTO(out_dput, 0);
-
- /* If we failed, then we must have failed opening, so don't look for
- * file descriptor or anything, just give the client the bad news.
- */
- if (req->rq_status)
- GOTO(out_dput, 0);
-
- mfd = NULL;
- spin_lock(&med->med_open_lock);
- list_for_each(t, &med->med_open_head) {
- mfd = list_entry(t, struct mds_file_data, mfd_list);
- if (mfd->mfd_xid == req->rq_xid) {
- mds_mfd_addref(mfd);
- break;
- }
- mfd = NULL;
- }
- spin_unlock(&med->med_open_lock);
-
- /* #warning "XXX fixme" bug 2991 */
- /* Here it used to LASSERT(mfd) if exp_outstanding_reply != NULL.
- * Now that exp_outstanding_reply is a list, it's just using mfd != NULL
- * to detect a re-open */
- if (mfd == NULL) {
- if (rec->ur_flags & MDS_OPEN_JOIN_FILE) {
- rc = mds_join_file(rec, req, dchild, NULL);
- if (rc)
- GOTO(out_dput, rc);
- }
- mntget(mds->mds_vfsmnt);
- CERROR("Re-opened file \n");
- mfd = mds_dentry_open(dchild, mds->mds_vfsmnt,
- rec->ur_flags & ~MDS_OPEN_TRUNC, req);
- if (!mfd) {
- CERROR("mds: out of memory\n");
- GOTO(out_dput, req->rq_status = -ENOMEM);
- }
- put_child = 0;
- } else {
- body->handle.cookie = mfd->mfd_handle.h_cookie;
- CDEBUG(D_INODE, "resend mfd %p, cookie "LPX64"\n", mfd,
- mfd->mfd_handle.h_cookie);
- }
-
- mds_mfd_put(mfd);
-
- out_dput:
- if (put_child)
- l_dput(dchild);
- l_dput(parent);
- EXIT;
-}
-
-/* do NOT or the MAY_*'s, you'll get the weakest */
-static int accmode(struct inode *inode, int flags)
-{
- int res = 0;
-
- /* Sadly, NFSD reopens a file repeatedly during operation, so the
- * "acc_mode = 0" allowance for newly-created files isn't honoured.
- * NFSD uses the MDS_OPEN_OWNEROVERRIDE flag to say that a file
- * owner can write to a file even if it is marked readonly to hide
- * its brokenness. (bug 5781) */
- if (flags & MDS_OPEN_OWNEROVERRIDE && inode->i_uid == current->fsuid)
- return 0;
-
- if (flags & FMODE_READ)
- res = MAY_READ;
- if (flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
- res |= MAY_WRITE;
- if (flags & MDS_FMODE_EXEC)
- res = MAY_EXEC;
- return res;
-}
-
-/* Handles object creation, actual opening, and I/O epoch */
-static int mds_finish_open(struct ptlrpc_request *req, struct dentry *dchild,
- struct mds_body *body, int flags, void **handle,
- struct mds_update_record *rec,struct ldlm_reply *rep,
- struct lustre_handle *lockh)
-{
- struct mds_obd *mds = mds_req2mds(req);
- struct obd_device *obd = req->rq_export->exp_obd;
- struct mds_file_data *mfd = NULL;
- struct lov_mds_md *lmm = NULL; /* object IDs created */
- int rc = 0;
- ENTRY;
-
- /* atomically create objects if necessary */
- LOCK_INODE_MUTEX(dchild->d_inode);
-
- if (S_ISREG(dchild->d_inode->i_mode) &&
- !(body->valid & OBD_MD_FLEASIZE)) {
- rc = mds_pack_md(obd, req->rq_repmsg, DLM_REPLY_REC_OFF + 1,
- body, dchild->d_inode, 0);
- if (rc) {
- UNLOCK_INODE_MUTEX(dchild->d_inode);
- RETURN(rc);
- }
- }
- if (rec != NULL) {
- if ((body->valid & OBD_MD_FLEASIZE) &&
- (rec->ur_flags & MDS_OPEN_HAS_EA)) {
- UNLOCK_INODE_MUTEX(dchild->d_inode);
- RETURN(-EEXIST);
- }
- if (rec->ur_flags & MDS_OPEN_JOIN_FILE) {
- UNLOCK_INODE_MUTEX(dchild->d_inode);
- rc = mds_join_file(rec, req, dchild, lockh);
- if (rc)
- RETURN(rc);
- LOCK_INODE_MUTEX(dchild->d_inode);
- }
- if (!(body->valid & OBD_MD_FLEASIZE) &&
- !(body->valid & OBD_MD_FLMODEASIZE)) {
- /* no EA: create objects */
- rc = mds_create_objects(req, DLM_REPLY_REC_OFF + 1, rec,
- mds, obd, dchild, handle, &lmm);
- if (rc) {
- CERROR("mds_create_objects: rc = %d\n", rc);
- UNLOCK_INODE_MUTEX(dchild->d_inode);
- RETURN(rc);
- }
- }
- }
- /* If the inode has no EA data, then MDS holds size, mtime */
- if (S_ISREG(dchild->d_inode->i_mode) &&
- !(body->valid & OBD_MD_FLEASIZE)) {
- body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
- OBD_MD_FLATIME | OBD_MD_FLMTIME);
- }
- UNLOCK_INODE_MUTEX(dchild->d_inode);
-
- if (rec && !(rec->ur_flags & MDS_OPEN_JOIN_FILE))
- lustre_shrink_reply(req, DLM_REPLY_REC_OFF + 1,
- body->eadatasize, 0);
-
- if (req->rq_export->exp_connect_flags & OBD_CONNECT_ACL &&
- rec && !(rec->ur_flags & MDS_OPEN_JOIN_FILE)) {
- int acl_off = DLM_REPLY_REC_OFF + (body->eadatasize ? 2 : 1);
-
- rc = mds_pack_acl(&req->rq_export->exp_mds_data,
- dchild->d_inode, req->rq_repmsg,
- body, acl_off);
- lustre_shrink_reply(req, acl_off, body->aclsize, 0);
- if (rc)
- RETURN(rc);
- }
-
- intent_set_disposition(rep, DISP_OPEN_OPEN);
- mfd = mds_dentry_open(dchild, mds->mds_vfsmnt, flags, req);
- if (IS_ERR(mfd))
- RETURN(PTR_ERR(mfd));
-
- CDEBUG(D_INODE, "mfd %p, cookie "LPX64"\n", mfd,
- mfd->mfd_handle.h_cookie);
-
- if (lmm != NULL)
- mds_lov_update_objids(obd, lmm);
-
- if (rc) /* coverity[deadcode] */
- mds_mfd_unlink(mfd, 1);
-
- mds_mfd_put(mfd);
- RETURN(rc);
-}
-
-static int mds_open_by_fid(struct ptlrpc_request *req, struct ll_fid *fid,
- struct mds_body *body, int flags,
- struct mds_update_record *rec,struct ldlm_reply *rep)
-{
- struct mds_obd *mds = mds_req2mds(req);
- struct dentry *dchild;
- char fidname[LL_FID_NAMELEN];
- int fidlen = 0, rc;
- void *handle = NULL;
- ENTRY;
-
- fidlen = ll_fid2str(fidname, fid->id, fid->generation);
- dchild = ll_lookup_one_len(fidname, mds->mds_pending_dir, fidlen);
- if (IS_ERR(dchild)) {
- rc = PTR_ERR(dchild);
- CERROR("error looking up %s in PENDING: rc = %d\n",fidname, rc);
- RETURN(rc);
- }
-
- if (dchild->d_inode != NULL) {
- mds_inode_set_orphan(dchild->d_inode);
- CWARN("Orphan %s found and opened in PENDING directory\n",
- fidname);
- } else {
- l_dput(dchild);
-
- /* We didn't find it in PENDING so it isn't an orphan. See
- * if it was a regular inode that was previously created. */
- dchild = mds_fid2dentry(mds, fid, NULL);
- if (IS_ERR(dchild))
- RETURN(PTR_ERR(dchild));
- }
-
- mds_pack_inode2fid(&body->fid1, dchild->d_inode);
- mds_pack_inode2body(body, dchild->d_inode);
- intent_set_disposition(rep, DISP_LOOKUP_EXECD);
- intent_set_disposition(rep, DISP_LOOKUP_POS);
-
- rc = mds_finish_open(req, dchild, body, flags, &handle, rec, rep, NULL);
- rc = mds_finish_transno(mds, dchild->d_inode, handle,
- req, rc, rep ? rep->lock_policy_res1 : 0, 0);
- /* XXX what do we do here if mds_finish_transno itself failed? */
-
- l_dput(dchild);
- RETURN(rc);
-}
-
-int mds_pin(struct ptlrpc_request *req, int offset)
-{
- struct obd_device *obd = req->rq_export->exp_obd;
- struct mds_body *reqbody, *repbody;
- struct lvfs_run_ctxt saved;
- int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*repbody) };
- ENTRY;
-
- reqbody = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*reqbody));
-
- rc = lustre_pack_reply(req, 2, size, NULL);
- if (rc)
- RETURN(rc);
-
- repbody = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
- sizeof(*repbody));
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- rc = mds_open_by_fid(req, &reqbody->fid1, repbody, reqbody->flags, NULL,
- NULL);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- RETURN(rc);
-}
-
-/* Get an internal lock on the inode number (but not generation) to sync
- * new inode creation with inode unlink (bug 2029). If child_lockh is NULL
- * we just get the lock as a barrier to wait for other holders of this lock,
- * and drop it right away again. */
-int mds_lock_new_child(struct obd_device *obd, struct inode *inode,
- struct lustre_handle *child_lockh)
-{
- struct ldlm_res_id child_res_id = { .name = { inode->i_ino, 0, 1, 0 } };
- struct lustre_handle lockh;
- int lock_flags = LDLM_FL_ATOMIC_CB;
- int rc;
-
- if (child_lockh == NULL)
- child_lockh = &lockh;
-
- rc = ldlm_cli_enqueue_local(obd->obd_namespace, &child_res_id,
- LDLM_PLAIN, NULL, LCK_EX, &lock_flags,
- ldlm_blocking_ast, ldlm_completion_ast,
- NULL, NULL, 0, NULL, child_lockh);
- if (rc != ELDLM_OK)
- CERROR("ldlm_cli_enqueue_local: %d\n", rc);
- else if (child_lockh == &lockh)
- ldlm_lock_decref(child_lockh, LCK_EX);
-
- RETURN(rc);
-}
-
-int mds_open(struct mds_update_record *rec, int offset,
- struct ptlrpc_request *req, struct lustre_handle *child_lockh)
-{
- /* XXX ALLOCATE _something_ - 464 bytes on stack here */
- struct obd_device *obd = req->rq_export->exp_obd;
- struct mds_obd *mds = mds_req2mds(req);
- struct ldlm_reply *rep = NULL;
- struct mds_body *body = NULL;
- struct dentry *dchild = NULL, *dparent = NULL;
- struct mds_export_data *med;
- struct lustre_handle parent_lockh;
- int rc = 0, cleanup_phase = 0, acc_mode, created = 0;
- int parent_mode = LCK_CR;
- void *handle = NULL;
- struct lvfs_dentry_params dp = LVFS_DENTRY_PARAMS_INIT;
- unsigned int qcids[MAXQUOTAS] = { current->fsuid, current->fsgid };
- unsigned int qpids[MAXQUOTAS] = { 0, 0 };
- int child_mode = LCK_CR;
- /* Always returning LOOKUP lock if open succesful to guard
- dentry on client. */
- ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_LOOKUP}};
- struct ldlm_res_id child_res_id = { .name = {0}};
- int lock_flags = 0;
- ENTRY;
-
- mds_counter_incr(req->rq_export, LPROC_MDS_OPEN);
-
- OBD_FAIL_TIMEOUT_ORSET(OBD_FAIL_MDS_PAUSE_OPEN, OBD_FAIL_ONCE,
- (obd_timeout + 1) / 4);
-
- CLASSERT(MAXQUOTAS < 4);
- if (offset == DLM_INTENT_REC_OFF) { /* intent */
- rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF,
- sizeof(*rep));
- body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF,
- sizeof(*body));
- } else if (offset == REQ_REC_OFF) { /* non-intent reint */
- body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
- sizeof(*body));
- LBUG(); /* XXX: not supported yet? */
- } else {
- body = NULL;
- LBUG();
- }
-
- MDS_CHECK_RESENT(req, reconstruct_open(rec, offset, req, child_lockh));
-
- /* Step 0: If we are passed a fid, then we assume the client already
- * opened this file and is only replaying the RPC, so we open the
- * inode by fid (at some large expense in security). */
- /*XXX liblustre use mds_open_by_fid to implement LL_IOC_LOV_SETSTRIPE */
- if (((lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) ||
- (req->rq_export->exp_libclient && rec->ur_flags&MDS_OPEN_HAS_EA))&&
- !(rec->ur_flags & MDS_OPEN_JOIN_FILE)) {
- if (rec->ur_fid2->id == 0) {
- struct ldlm_lock *lock = ldlm_handle2lock(child_lockh);
- if (lock) {
- LDLM_ERROR(lock, "fid2 not set on open replay");
- LDLM_LOCK_PUT(lock);
- }
- DEBUG_REQ(D_ERROR, req, "fid2 not set on open replay");
- RETURN(-EFAULT);
- }
-
- rc = mds_open_by_fid(req, rec->ur_fid2, body, rec->ur_flags,
- rec, rep);
- if (rc != -ENOENT) {
- if (req->rq_export->exp_libclient &&
- rec->ur_flags & MDS_OPEN_HAS_EA)
- RETURN(0);
-
- RETURN(rc);
- }
-
- /* We didn't find the correct inode on disk either, so we
- * need to re-create it via a regular replay. */
- if (!(rec->ur_flags & MDS_OPEN_CREAT)) {
- DEBUG_REQ(D_ERROR, req,"OPEN_CREAT not in open replay");
- RETURN(-EFAULT);
- }
- } else if (rec->ur_fid2->id) {
- DEBUG_REQ(D_ERROR, req, "fid2 "LPU64"/%u on open non-replay",
- rec->ur_fid2->id, rec->ur_fid2->generation);
- RETURN(-EFAULT);
- }
-
- /* If we got here, we must be called via intent */
- LASSERT(offset == DLM_INTENT_REC_OFF);
-
- med = &req->rq_export->exp_mds_data;
- if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) {
- CERROR("test case OBD_FAIL_MDS_OPEN_PACK\n");
- RETURN(-ENOMEM);
- }
-
- /* Step 1: Find and lock the parent */
- if (rec->ur_flags & (MDS_OPEN_CREAT | MDS_OPEN_JOIN_FILE))
- parent_mode = LCK_EX;
- dparent = mds_fid2locked_dentry(obd, rec->ur_fid1, NULL, parent_mode,
- &parent_lockh, MDS_INODELOCK_UPDATE);
- if (IS_ERR(dparent)) {
- rc = PTR_ERR(dparent);
- if (rc != -ENOENT) {
- CERROR("parent "LPU64"/%u lookup error %d\n",
- rec->ur_fid1->id, rec->ur_fid1->generation, rc);
- } else {
- /* Just cannot find parent - make it look like
- * usual negative lookup to avoid extra MDS RPC */
- intent_set_disposition(rep, DISP_LOOKUP_EXECD);
- intent_set_disposition(rep, DISP_LOOKUP_NEG);
- }
- GOTO(cleanup, rc);
- }
- LASSERT(dparent->d_inode != NULL);
-
- cleanup_phase = 1; /* parent dentry and lock */
-
- if (rec->ur_flags & MDS_OPEN_JOIN_FILE) {
- dchild = dget(dparent);
- cleanup_phase = 2; /* child dentry */
- acc_mode = accmode(dchild->d_inode, rec->ur_flags);
- GOTO(found_child, rc);
- }
-
- /* Step 2: Lookup the child */
-
- if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) &&
- (rec->ur_flags & MDS_OPEN_LOCK) && (rec->ur_namelen == 1)) {
- /* hack for nfsd with no_subtree_check, it will use anon
- * dentry w/o filename to open the file. the anon dentry's
- * parent was set to itself, so rec->ur_fid1 is the file.
- * And in MDC it cannot derive the dentry's parent dentry,
- * hence the file's name, so we hack here in MDS,
- * refer to bug 13030. */
- dchild = mds_fid2dentry(mds, rec->ur_fid1, NULL);
- } else {
- dchild = ll_lookup_one_len(rec->ur_name, dparent,
- rec->ur_namelen - 1);
- }
- if (IS_ERR(dchild)) {
- rc = PTR_ERR(dchild);
- dchild = NULL; /* don't confuse mds_finish_transno() below */
- GOTO(cleanup, rc);
- }
-
- cleanup_phase = 2; /* child dentry */
-
- intent_set_disposition(rep, DISP_LOOKUP_EXECD);
- if (dchild->d_inode)
- intent_set_disposition(rep, DISP_LOOKUP_POS);
- else
- intent_set_disposition(rep, DISP_LOOKUP_NEG);
-
- /*Step 3: If the child was negative, and we're supposed to, create it.*/
- if (dchild->d_inode == NULL) {
- unsigned long ino = rec->ur_fid2->id;
- struct iattr iattr;
- struct inode *inode;
-
- if (!(rec->ur_flags & MDS_OPEN_CREAT)) {
- /* It's negative and we weren't supposed to create it */
- GOTO(cleanup, rc = -ENOENT);
- }
-
- if (req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
- GOTO(cleanup, rc = -EROFS);
-
- intent_set_disposition(rep, DISP_OPEN_CREATE);
- handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_CREATE,
- NULL);
- if (IS_ERR(handle)) {
- rc = PTR_ERR(handle);
- handle = NULL;
- GOTO(cleanup, rc);
- }
- dchild->d_fsdata = (void *) &dp;
- dp.ldp_ptr = req;
- dp.ldp_inum = ino;
-
- rc = ll_vfs_create(dparent->d_inode, dchild, rec->ur_mode,NULL);
- if (dchild->d_fsdata == (void *)(unsigned long)ino)
- dchild->d_fsdata = NULL;
-
- if (rc) {
- CDEBUG(D_INODE, "error during create: %d\n", rc);
- GOTO(cleanup, rc);
- }
- inode = dchild->d_inode;
- if (ino) {
- LASSERT(ino == inode->i_ino);
- /* Written as part of setattr */
- inode->i_generation = rec->ur_fid2->generation;
- CDEBUG(D_HA, "recreated ino %lu with gen %u\n",
- inode->i_ino, inode->i_generation);
- }
-
- created = 1;
- LTIME_S(iattr.ia_atime) = rec->ur_time;
- LTIME_S(iattr.ia_ctime) = rec->ur_time;
- LTIME_S(iattr.ia_mtime) = rec->ur_time;
-
- iattr.ia_uid = current->fsuid; /* set by push_ctxt already */
- if (dparent->d_inode->i_mode & S_ISGID)
- iattr.ia_gid = dparent->d_inode->i_gid;
- else
- iattr.ia_gid = current->fsgid;
-
- iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
- ATTR_MTIME | ATTR_CTIME;
-
- 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);
-
- rc = fsfilt_commit(obd, dchild->d_inode, handle, 0);
- handle = NULL;
- acc_mode = 0; /* Don't check for permissions */
- } else {
- acc_mode = accmode(dchild->d_inode, rec->ur_flags);
- }
-
- LASSERTF(!mds_inode_is_orphan(dchild->d_inode),
- "dchild %.*s (%p) inode %p/%lu/%u\n", dchild->d_name.len,
- dchild->d_name.name, dchild, dchild->d_inode,
- dchild->d_inode->i_ino, dchild->d_inode->i_generation);
-
-found_child:
- mds_pack_inode2fid(&body->fid1, dchild->d_inode);
- mds_pack_inode2body(body, dchild->d_inode);
-
- if (S_ISREG(dchild->d_inode->i_mode)) {
- /* Check permissions etc */
- rc = ll_permission(dchild->d_inode, acc_mode, NULL);
- if (rc != 0)
- GOTO(cleanup, rc);
-
- if ((req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY) &&
- (acc_mode & MAY_WRITE))
- GOTO(cleanup, rc = -EROFS);
-
- /* An append-only file must be opened in append mode for
- * writing */
- if (IS_APPEND(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0 &&
- ((rec->ur_flags & MDS_OPEN_APPEND) == 0 ||
- (rec->ur_flags & MDS_OPEN_TRUNC) != 0))
- GOTO(cleanup, rc = -EPERM);
- }
-
- if (!created && (rec->ur_flags & MDS_OPEN_CREAT) &&
- (rec->ur_flags & MDS_OPEN_EXCL)) {
- /* File already exists, we didn't just create it, and we
- * were passed O_EXCL; err-or. */
- GOTO(cleanup, rc = -EEXIST); // returns a lock to the client
- }
-
- /* if we are following a symlink, don't open */
- if (S_ISLNK(dchild->d_inode->i_mode))
- GOTO(cleanup_no_trans, rc = 0);
-
- if (S_ISDIR(dchild->d_inode->i_mode)) {
- if (rec->ur_flags & MDS_OPEN_CREAT ||
- rec->ur_flags & FMODE_WRITE) {
- /* we are trying to create or write a exist dir */
- GOTO(cleanup, rc = -EISDIR);
- }
- if (rec->ur_flags & MDS_FMODE_EXEC) {
- /* we are trying to exec a directory */
- GOTO(cleanup, rc = -EACCES);
- }
- if (ll_permission(dchild->d_inode, acc_mode, NULL)) {
- intent_set_disposition(rep, DISP_OPEN_OPEN);
- GOTO(cleanup, rc = -EACCES);
- }
- } else if (rec->ur_flags & MDS_OPEN_DIRECTORY) {
- GOTO(cleanup, rc = -ENOTDIR);
- }
-
- if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MDS_OPEN_CREATE,
- OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE)) {
- GOTO(cleanup, rc = -EAGAIN);
- }
-
- /* Obtain OPEN lock as well */
- policy.l_inodebits.bits |= MDS_INODELOCK_OPEN;
-
- /* We cannot use acc_mode here, because it is zeroed in case of
- creating a file, so we get wrong lockmode */
- if (accmode(dchild->d_inode, rec->ur_flags) & MAY_WRITE)
- child_mode = LCK_CW;
- else if (accmode(dchild->d_inode, rec->ur_flags) & MAY_EXEC)
- child_mode = LCK_PR;
- else
- child_mode = LCK_CR;
-
- if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) &&
- (rec->ur_flags & MDS_OPEN_LOCK)) {
- /* In case of replay we do not get a lock assuming that the
- caller has it already */
- child_res_id.name[0] = dchild->d_inode->i_ino;
- child_res_id.name[1] = dchild->d_inode->i_generation;
-
- rc = ldlm_cli_enqueue_local(obd->obd_namespace, &child_res_id,
- LDLM_IBITS, &policy, child_mode,
- &lock_flags, ldlm_blocking_ast,
- ldlm_completion_ast, NULL, NULL,
- 0, NULL, child_lockh);
- if (rc != ELDLM_OK)
- GOTO(cleanup, rc);
-
- /* Let mds_intent_policy know that we have a lock to return */
- intent_set_disposition(rep, DISP_OPEN_LOCK);
- cleanup_phase = 3;
- }
-
- if (!S_ISREG(dchild->d_inode->i_mode) &&
- !S_ISDIR(dchild->d_inode->i_mode) &&
- (req->rq_export->exp_connect_flags & OBD_CONNECT_NODEVOH)) {
- /* If client supports this, do not return open handle for
- * special device nodes */
- GOTO(cleanup_no_trans, rc = 0);
- }
-
- /* Step 5: mds_open it */
- rc = mds_finish_open(req, dchild, body, rec->ur_flags, &handle, rec,
- rep, &parent_lockh);
- GOTO(cleanup, rc);
-
- cleanup:
- rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
- req, rc, rep ? rep->lock_policy_res1 : 0, 0);
-
- cleanup_no_trans:
- switch (cleanup_phase) {
- case 3:
- if (rc)
- /* It is safe to leave IT_OPEN_LOCK set, if rc is not 0,
- * mds_intent_policy won't try to return any locks */
- ldlm_lock_decref(child_lockh, child_mode);
- case 2:
- if (rc && created) {
- int err = vfs_unlink(dparent->d_inode, dchild);
- if (err) {
- CERROR("unlink(%.*s) in error path: %d\n",
- dchild->d_name.len, dchild->d_name.name,
- err);
- }
- } else if (created) {
- mds_lock_new_child(obd, dchild->d_inode, NULL);
- /* save uid/gid for quota acquire/release */
- qpids[USRQUOTA] = dparent->d_inode->i_uid;
- qpids[GRPQUOTA] = dparent->d_inode->i_gid;
- }
- l_dput(dchild);
- case 1:
- if (dparent == NULL)
- break;
-
- l_dput(dparent);
- if (rc)
- ldlm_lock_decref(&parent_lockh, parent_mode);
- else
- ptlrpc_save_lock(req, &parent_lockh, parent_mode);
- }
- /* trigger dqacq on the owner of child and parent */
- lquota_adjust(mds_quota_interface_ref, obd, qcids, qpids, rc,
- FSFILT_OP_CREATE);
-
- /* If we have not taken the "open" lock, we may not return 0 here,
- because caller expects 0 to mean "lock is taken", and it needs
- nonzero return here for caller to return EDLM_LOCK_ABORTED to
- client. Later caller should rewrite the return value back to zero
- if it to be used any further
- */
- RETURN(rc);
-}
-
-/* Close a "file descriptor" and possibly unlink an orphan from the
- * PENDING directory. Caller must hold child->i_mutex, this drops it.
- *
- * If we are being called from mds_disconnect() because the client has
- * disappeared, then req == NULL and we do not update last_rcvd because
- * there is nothing that could be recovered by the client at this stage
- * (it will not even _have_ an entry in last_rcvd anymore).
- *
- * Returns EAGAIN if the client needs to get more data and re-close. */
-int mds_mfd_close(struct ptlrpc_request *req, int offset,struct obd_device *obd,
- struct mds_file_data *mfd, int unlink_orphan,
- struct lov_mds_md *lmm, int lmm_size,
- struct llog_cookie *logcookies, int cookies_size,
- __u64 *valid)
-{
- struct inode *inode = mfd->mfd_dentry->d_inode;
- char fidname[LL_FID_NAMELEN];
- int last_orphan, fidlen, rc = 0, cleanup_phase = 0;
- struct dentry *pending_child = NULL;
- struct mds_obd *mds = &obd->u.mds;
- struct inode *pending_dir = mds->mds_pending_dir->d_inode;
- void *handle = NULL;
- struct mds_body *request_body = NULL, *reply_body = NULL;
- struct lvfs_dentry_params dp = LVFS_DENTRY_PARAMS_INIT;
- struct iattr iattr = { 0 };
- ENTRY;
-
- if (req && req->rq_reqmsg != NULL)
- request_body = lustre_msg_buf(req->rq_reqmsg, offset,
- sizeof(*request_body));
- if (req && req->rq_repmsg != NULL)
- reply_body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
- sizeof(*reply_body));
-
- fidlen = ll_fid2str(fidname, inode->i_ino, inode->i_generation);
-
- CDEBUG(D_INODE, "inode %p ino %s nlink %d orphan %d\n", inode, fidname,
- inode->i_nlink, mds_orphan_open_count(inode));
-
- last_orphan = mds_orphan_open_dec_test(inode) &&
- mds_inode_is_orphan(inode);
-
- /* this is half of the actual "close" */
- if (mfd->mfd_mode & FMODE_WRITE) {
- rc = mds_put_write_access(mds, inode, request_body,
- last_orphan && unlink_orphan);
- } else if (mfd->mfd_mode & MDS_FMODE_EXEC) {
- mds_allow_write_access(inode);
- }
- /* here writecount change also needs protection from orphan write sem.
- * so drop orphan write sem after mds_put_write_access, bz 12888. */
- MDS_UP_WRITE_ORPHAN_SEM(inode);
-
- if (last_orphan && unlink_orphan) {
- int stripe_count = 0;
- LASSERT(rc == 0); /* mds_put_write_access must have succeeded */
-
- CDEBUG(D_INODE, "destroying orphan object %s\n", fidname);
-
- if ((S_ISREG(inode->i_mode) && inode->i_nlink != 1) ||
- (S_ISDIR(inode->i_mode) && inode->i_nlink != 2))
- CERROR("found \"orphan\" %s %s with link count %d\n",
- S_ISREG(inode->i_mode) ? "file" : "dir",
- fidname, inode->i_nlink);
-
- /* Sadly, there is no easy way to save pending_child from
- * mds_reint_unlink() into mfd, so we need to re-lookup,
- * but normally it will still be in the dcache. */
- LOCK_INODE_MUTEX(pending_dir);
- cleanup_phase = 1; /* UNLOCK_INODE_MUTEX(pending_dir) when finished */
- pending_child = lookup_one_len(fidname, mds->mds_pending_dir,
- fidlen);
- if (IS_ERR(pending_child))
- GOTO(cleanup, rc = PTR_ERR(pending_child));
- LASSERT(pending_child->d_inode != NULL);
-
- cleanup_phase = 2; /* dput(pending_child) when finished */
- if (S_ISDIR(pending_child->d_inode->i_mode)) {
- rc = vfs_rmdir(pending_dir, pending_child);
- if (rc)
- CERROR("error unlinking orphan dir %s: rc %d\n",
- fidname,rc);
- goto out;
- }
-
- if (lmm != NULL) {
- stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
- }
-
- handle = fsfilt_start_log(obd, pending_dir, FSFILT_OP_UNLINK,
- NULL, stripe_count);
- if (IS_ERR(handle)) {
- rc = PTR_ERR(handle);
- handle = NULL;
- GOTO(cleanup, rc);
- }
-
- if (lmm != NULL && (*valid & OBD_MD_FLEASIZE) &&
- mds_log_op_unlink(obd, lmm, lmm_size,
- logcookies, cookies_size) > 0) {
- *valid |= OBD_MD_FLCOOKIE;
- }
-
- dp.ldp_inum = 0;
- dp.ldp_ptr = req;
- pending_child->d_fsdata = (void *) &dp;
- rc = vfs_unlink(pending_dir, pending_child);
- if (rc)
- CERROR("error unlinking orphan %s: rc %d\n",fidname,rc);
-
- goto out; /* Don't bother updating attrs on unlinked inode */
- }
-
-#if 0
- if (request_body != NULL && mfd->mfd_mode & FMODE_WRITE && rc == 0) {
- /* Update the on-disk attributes if this was the last write
- * close, and all information was provided (i.e., rc == 0)
- *
- * XXX this should probably be abstracted with mds_reint_setattr
- */
-
- if (request_body->valid & OBD_MD_FLMTIME &&
- LTIME_S(iattr.ia_mtime) > LTIME_S(inode->i_mtime)) {
- LTIME_S(iattr.ia_mtime) = request_body->mtime;
- iattr.ia_valid |= ATTR_MTIME;
- }
- if (request_body->valid & OBD_MD_FLCTIME &&
- LTIME_S(iattr.ia_ctime) > LTIME_S(inode->i_ctime)) {
- LTIME_S(iattr.ia_ctime) = request_body->ctime;
- iattr.ia_valid |= ATTR_CTIME;
- }
-
- /* XXX can't set block count with fsfilt_setattr (!) */
- if (request_body->valid & OBD_MD_FLSIZE) {
- iattr.ia_valid |= ATTR_SIZE;
- iattr.ia_size = request_body->size;
- }
- /* iattr.ia_blocks = request_body->blocks */
-
- }
-#endif
- if (request_body != NULL && request_body->valid & OBD_MD_FLATIME) {
- /* Only start a transaction to write out only the atime if
- * it is more out-of-date than the specified limit. If we
- * are already going to write out the atime then do it anyway.
- * */
- LTIME_S(iattr.ia_atime) = request_body->atime;
- if ((LTIME_S(iattr.ia_atime) >
- LTIME_S(inode->i_atime) + mds->mds_atime_diff) ||
- (iattr.ia_valid != 0 &&
- LTIME_S(iattr.ia_atime) > LTIME_S(inode->i_atime)))
- iattr.ia_valid |= ATTR_ATIME;
- }
-
- if (iattr.ia_valid != 0) {
- handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
- if (IS_ERR(handle)) {
- rc = PTR_ERR(handle);
- handle = NULL;
- GOTO(cleanup, rc);
- }
- rc = fsfilt_setattr(obd, mfd->mfd_dentry, handle, &iattr, 0);
- if (rc)
- CERROR("error in setattr(%s): rc %d\n", fidname, rc);
- }
-out:
- /* If other clients have this file open for write, rc will be > 0 */
- if (rc > 0)
- rc = 0;
- l_dput(mfd->mfd_dentry);
- mds_mfd_put(mfd);
-
- cleanup:
- if (req != NULL && reply_body != NULL) {
- rc = mds_finish_transno(mds, pending_dir, handle, req, rc, 0, 0);
- } else if (handle) {
- int err = fsfilt_commit(obd, pending_dir, handle, 0);
- if (err) {
- CERROR("error committing close: %d\n", err);
- if (!rc)
- rc = err;
- }
- }
-
- switch (cleanup_phase) {
- case 2:
- dput(pending_child);
- case 1:
- UNLOCK_INODE_MUTEX(pending_dir);
- }
- RETURN(rc);
-}
-
-int mds_close(struct ptlrpc_request *req, int offset)
-{
- struct mds_export_data *med = &req->rq_export->exp_mds_data;
- struct obd_device *obd = req->rq_export->exp_obd;
- struct mds_body *body;
- struct mds_file_data *mfd;
- struct lvfs_run_ctxt saved;
- struct inode *inode;
- int rc, repsize[4] = { sizeof(struct ptlrpc_body),
- sizeof(struct mds_body),
- obd->u.mds.mds_max_mdsize,
- obd->u.mds.mds_max_cookiesize };
- struct mds_body *reply_body;
- struct lov_mds_md *lmm;
- int lmm_size;
- struct llog_cookie *logcookies;
- int cookies_size;
- ENTRY;
-
- rc = lustre_pack_reply(req, 4, repsize, NULL);
- if (rc)
- req->rq_status = rc;
- /* continue on to drop local open even if we can't send reply */
- else
- MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
-
- CDEBUG(D_INODE, "close req->rep_len %d mdsize %d cookiesize %d\n",
- req->rq_replen,
- obd->u.mds.mds_max_mdsize, obd->u.mds.mds_max_cookiesize);
- mds_counter_incr(req->rq_export, LPROC_MDS_CLOSE);
-
- body = lustre_swab_reqbuf(req, offset, sizeof(*body),
- lustre_swab_mds_body);
- if (body == NULL) {
- CERROR("Can't unpack body\n");
- req->rq_status = -EFAULT;
- RETURN(-EFAULT);
- }
-
- spin_lock(&med->med_open_lock);
- mfd = mds_handle2mfd(&body->handle);
- if (mfd == NULL) {
- spin_unlock(&med->med_open_lock);
- DEBUG_REQ(D_ERROR, req, "no handle for file close ino "LPD64
- ": cookie "LPX64, body->fid1.id, body->handle.cookie);
- req->rq_status = -ESTALE;
- RETURN(-ESTALE);
- }
- /* Remove mfd handle so it can't be found again. We consume mfd_list
- * reference here, but still have mds_handle2mfd ref until mfd_close. */
- mds_mfd_unlink(mfd, 1);
- spin_unlock(&med->med_open_lock);
-
- inode = mfd->mfd_dentry->d_inode;
- /* child orphan sem protects orphan_dec_test && is_orphan race */
- MDS_DOWN_WRITE_ORPHAN_SEM(inode); /* mds_mfd_close drops this */
- if (mds_inode_is_orphan(inode) && mds_orphan_open_count(inode) == 1) {
- body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
- sizeof(*body));
- LASSERT(body != NULL);
-
- mds_pack_inode2fid(&body->fid1, inode);
- mds_pack_inode2body(body, inode);
- mds_pack_md(obd, req->rq_repmsg, REPLY_REC_OFF + 1, body, inode,
- MDS_PACK_MD_LOCK);
- }
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- reply_body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*reply_body));
- lmm = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 1, 0);
- lmm_size = lustre_msg_buflen(req->rq_repmsg, REPLY_REC_OFF + 1),
- logcookies = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 2, 0);
- cookies_size = lustre_msg_buflen(req->rq_repmsg, REPLY_REC_OFF + 2);
- req->rq_status = mds_mfd_close(req, offset, obd, mfd, 1,
- lmm, lmm_size, logcookies, cookies_size,
- &reply_body->valid);
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- mds_shrink_reply(obd, req, body, REPLY_REC_OFF + 1);
- if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) {
- CERROR("test case OBD_FAIL_MDS_CLOSE_PACK\n");
- req->rq_status = -ENOMEM;
- RETURN(-ENOMEM);
- }
-
- RETURN(rc);
-}
-
-int mds_done_writing(struct ptlrpc_request *req, int offset)
-{
- struct mds_body *body;
- int rc, size[2] = { sizeof(struct ptlrpc_body),
- sizeof(struct mds_body) };
- ENTRY;
-
- MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
-
- body = lustre_swab_reqbuf(req, offset, sizeof(*body),
- lustre_swab_mds_body);
- if (body == NULL) {
- CERROR("Can't unpack body\n");
- req->rq_status = -EFAULT;
- RETURN(-EFAULT);
- }
-
- rc = lustre_pack_reply(req, 2, size, NULL);
- if (rc)
- req->rq_status = rc;
-
- RETURN(0);
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff