mdc_lib.c

lustre 1.6.5 source code

/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 *  Copyright (c) 2003 Cluster File Systems, Inc.
 *
 *   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.
 */

#define DEBUG_SUBSYSTEM S_MDC
#ifndef __KERNEL__
# include <fcntl.h>
# include <liblustre.h>
#endif
#include <lustre/lustre_idl.h>
#include <lustre_net.h>
#include "mdc_internal.h"

#ifndef __KERNEL__
/* some liblustre hackings here */
#ifndef O_DIRECTORY
#define O_DIRECTORY     0
#endif
#endif

void mdc_readdir_pack(struct ptlrpc_request *req, int offset, __u64 pg_off,
                      __u32 size, struct ll_fid *fid)
{
        struct mds_body *b;

        b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*b));
        b->fsuid = current->fsuid;
        b->fsgid = current->fsgid;
        b->capability = current->cap_effective;
        b->fid1 = *fid;
        b->size = pg_off;                       /* !! */
        b->suppgid = -1;
        b->nlink = size;                        /* !! */
}

static void mdc_pack_body(struct mds_body *b)
{
        LASSERT (b != NULL);

        b->fsuid = current->fsuid;
        b->fsgid = current->fsgid;
        b->capability = current->cap_effective;
}

void mdc_pack_req_body(struct ptlrpc_request *req, int offset,
                       __u64 valid, struct ll_fid *fid, int ea_size, int flags)
{
        struct mds_body *b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*b));

        if (fid)
                b->fid1 = *fid;
        b->valid = valid;
        b->eadatasize = ea_size;
        b->flags = flags;
        mdc_pack_body(b);
}

/* packing of MDS records */
void mdc_create_pack(struct ptlrpc_request *req, int offset,
                     struct mdc_op_data *op_data, const void *data, int datalen,
                     __u32 mode, __u32 uid, __u32 gid, __u32 cap_effective,
                     __u64 rdev)
{
        struct mds_rec_create *rec;
        char *tmp;
        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));

        rec->cr_opcode = REINT_CREATE;
        rec->cr_fsuid = uid;
        rec->cr_fsgid = gid;
        rec->cr_cap = cap_effective;
        rec->cr_fid = op_data->fid1;
        memset(&rec->cr_replayfid, 0, sizeof(rec->cr_replayfid));
        rec->cr_mode = mode;
        rec->cr_rdev = rdev;
        rec->cr_time = op_data->mod_time;
        rec->cr_suppgid = op_data->suppgids[0];

        tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1, op_data->namelen + 1);
        LOGL0(op_data->name, op_data->namelen, tmp);

        if (data) {
                tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, datalen);
                memcpy (tmp, data, datalen);
        }
}

static __u32 mds_pack_open_flags(__u32 flags)
{
        __u32 cr_flags = (flags & (FMODE_READ | FMODE_WRITE |
                                   MDS_OPEN_DELAY_CREATE | MDS_OPEN_HAS_EA |
                                   MDS_OPEN_HAS_OBJS | MDS_OPEN_OWNEROVERRIDE |
                                   MDS_OPEN_LOCK));
        if (flags & O_CREAT)
                cr_flags |= MDS_OPEN_CREAT;
        if (flags & O_EXCL)
                cr_flags |= MDS_OPEN_EXCL;
        if (flags & O_TRUNC)
                cr_flags |= MDS_OPEN_TRUNC;
        if (flags & O_APPEND)
                cr_flags |= MDS_OPEN_APPEND;
        if (flags & O_SYNC)
                cr_flags |= MDS_OPEN_SYNC;
        if (flags & O_DIRECTORY)
                cr_flags |= MDS_OPEN_DIRECTORY;
        if (flags & O_JOIN_FILE)
                cr_flags |= MDS_OPEN_JOIN_FILE;
#ifdef FMODE_EXEC
        if (flags & FMODE_EXEC)
                cr_flags |= MDS_FMODE_EXEC;
#endif
        return cr_flags;
}

/* packing of MDS records */
void mdc_join_pack(struct ptlrpc_request *req, int offset,
                   struct mdc_op_data *op_data, __u64 head_size)
{
        struct mds_rec_join *rec;

        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*rec));
        LASSERT(rec != NULL);
        rec->jr_fid = op_data->fid2;
        rec->jr_headsize = head_size;
}

void mdc_open_pack(struct ptlrpc_request *req, int offset,
                   struct mdc_op_data *op_data, __u32 mode, __u64 rdev,
                   __u32 flags, const void *lmm, int lmmlen)
{
        struct mds_rec_create *rec;
        char *tmp;
        rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));

        /* XXX do something about time, uid, gid */
        rec->cr_opcode = REINT_OPEN;
        rec->cr_fsuid = current->fsuid;
        rec->cr_fsgid = current->fsgid;
        rec->cr_cap = current->cap_effective;
        rec->cr_fid = op_data->fid1;
        memset(&rec->cr_replayfid, 0, sizeof(rec->cr_replayfid));
        rec->cr_mode = mode;
        rec->cr_flags = mds_pack_open_flags(flags);
        rec->cr_rdev = rdev;
        rec->cr_time = op_data->mod_time;
        rec->cr_suppgid = op_data->suppgids[0];

        if (op_data->name) {
                tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1,
                                     op_data->namelen + 1);
                LOGL0(op_data->name, op_data->namelen, tmp);
        }

        if (lmm) {
                rec->cr_flags |= MDS_OPEN_HAS_EA;
#ifndef __KERNEL__
                /*XXX a hack for liblustre to set EA (LL_IOC_LOV_SETSTRIPE) */
                rec->cr_replayfid = op_data->fid2;
#endif
                tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, lmmlen);
                memcpy (tmp, lmm, lmmlen);
        }
}

static inline __u64 attr_pack(unsigned int ia_valid) {
        __u64 sa_valid = 0;

        if (ia_valid & ATTR_MODE)
                sa_valid |= MDS_ATTR_MODE;
        if (ia_valid & ATTR_UID)
                sa_valid |= MDS_ATTR_UID;
        if (ia_valid & ATTR_GID)
                sa_valid |= MDS_ATTR_GID;
        if (ia_valid & ATTR_SIZE)
                sa_valid |= MDS_ATTR_SIZE;
        if (ia_valid & ATTR_ATIME)
                sa_valid |= MDS_ATTR_ATIME;
        if (ia_valid & ATTR_MTIME)
                sa_valid |= MDS_ATTR_MTIME;
        if (ia_valid & ATTR_CTIME)
                sa_valid |= MDS_ATTR_CTIME;
        if (ia_valid & ATTR_ATIME_SET)
                sa_valid |= MDS_ATTR_ATIME_SET;
        if (ia_valid & ATTR_MTIME_SET)
                sa_valid |= MDS_ATTR_MTIME_SET;
        if (ia_valid & ATTR_FORCE)
                sa_valid |= MDS_ATTR_FORCE;
        if (ia_valid & ATTR_ATTR_FLAG)
                sa_valid |= MDS_ATTR_ATTR_FLAG;
        if (ia_valid & ATTR_KILL_SUID)
                sa_valid |=  MDS_ATTR_KILL_SUID;
        if (ia_valid & ATTR_KILL_SGID)
                sa_valid |= MDS_ATTR_KILL_SGID;
        if (ia_valid & ATTR_CTIME_SET)
                sa_valid |= MDS_ATTR_CTIME_SET;
        if (ia_valid & ATTR_FROM_OPEN)
                sa_valid |= MDS_ATTR_FROM_OPEN;
        if (ia_valid & MDS_OPEN_OWNEROVERRIDE)
                /* NFSD hack (see bug 5781) */
                sa_valid |= MDS_OPEN_OWNEROVERRIDE;
        return sa_valid;
}

void mdc_setattr_pack(struct ptlrpc_request *req, int offset,
                      struct mdc_op_data *data, struct iattr *iattr, void *ea,
                      int ealen, void *ea2, int ea2len)
{
        struct mds_rec_setattr *rec = lustre_msg_buf(req->rq_reqmsg, offset,
                                                     sizeof(*rec));
        rec->sa_opcode = REINT_SETATTR;
        rec->sa_fsuid = current->fsuid;