예제 #1
0
int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh)
{
	struct nfs_fsinfo fsinfo;
	int ret = -ENOMEM;

	dprintk("--> nfs4_get_rootfh()\n");

	fsinfo.fattr = nfs_alloc_fattr();
	if (fsinfo.fattr == NULL)
		goto out;

	/* Start by getting the root filehandle from the server */
	ret = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo);
	if (ret < 0) {
		dprintk("nfs4_get_rootfh: getroot error = %d\n", -ret);
		goto out;
	}

	if (!(fsinfo.fattr->valid & NFS_ATTR_FATTR_TYPE)
			|| !S_ISDIR(fsinfo.fattr->mode)) {
		printk(KERN_ERR "nfs4_get_rootfh:"
		       " getroot encountered non-directory\n");
		ret = -ENOTDIR;
		goto out;
	}

	if (fsinfo.fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
		printk(KERN_ERR "nfs4_get_rootfh:"
		       " getroot obtained referral\n");
		ret = -EREMOTE;
		goto out;
	}

	memcpy(&server->fsid, &fsinfo.fattr->fsid, sizeof(server->fsid));
out:
	nfs_free_fattr(fsinfo.fattr);
	dprintk("<-- nfs4_get_rootfh() = %d\n", ret);
	return ret;
}
예제 #2
0
파일: proc.c 프로젝트: Cool-Joe/imx23-audio
static int
nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
	struct nfs_linkargs	arg = {
		.fromfh		= NFS_FH(inode),
		.tofh		= NFS_FH(dir),
		.toname		= name->name,
		.tolen		= name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_LINK],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  link %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
	nfs_mark_for_revalidate(inode);
	nfs_mark_for_revalidate(dir);
	dprintk("NFS reply link: %d\n", status);
	return status;
}

static int
nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
		 unsigned int len, struct iattr *sattr)
{
	struct nfs_fh *fh;
	struct nfs_fattr *fattr;
	struct nfs_symlinkargs	arg = {
		.fromfh		= NFS_FH(dir),
		.fromname	= dentry->d_name.name,
		.fromlen	= dentry->d_name.len,
		.pages		= &page,
		.pathlen	= len,
		.sattr		= sattr
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_SYMLINK],
		.rpc_argp	= &arg,
	};
	int status = -ENAMETOOLONG;

	dprintk("NFS call  symlink %s\n", dentry->d_name.name);

	if (len > NFS2_MAXPATHLEN)
		goto out;

	fh = nfs_alloc_fhandle();
	fattr = nfs_alloc_fattr();
	status = -ENOMEM;
	if (fh == NULL || fattr == NULL)
		goto out_free;

	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);

	/*
	 * V2 SYMLINK requests don't return any attributes.  Setting the
	 * filehandle size to zero indicates to nfs_instantiate that it
	 * should fill in the data with a LOOKUP call on the wire.
	 */
	if (status == 0)
		status = nfs_instantiate(dentry, fh, fattr, NULL);

out_free:
	nfs_free_fattr(fattr);
	nfs_free_fhandle(fh);
out:
	dprintk("NFS reply symlink: %d\n", status);
	return status;
}

static int
nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
	struct nfs_createdata *data;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_MKDIR],
	};
	int status = -ENOMEM;

	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
	data = nfs_alloc_createdata(dir, dentry, sattr);
	if (data == NULL)
		goto out;
	msg.rpc_argp = &data->arg;
	msg.rpc_resp = &data->res;

	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);
	if (status == 0)
		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
	nfs_free_createdata(data);
out:
	dprintk("NFS reply mkdir: %d\n", status);
	return status;
}

static int
nfs_proc_rmdir(struct inode *dir, struct qstr *name)
{
	struct nfs_diropargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= name->name,
		.len		= name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_RMDIR],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  rmdir %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);
	dprintk("NFS reply rmdir: %d\n", status);
	return status;
}

/*
 * The READDIR implementation is somewhat hackish - we pass a temporary
 * buffer to the encode function, which installs it in the receive
 * the receive iovec. The decode function just parses the reply to make
 * sure it is syntactically correct; the entries itself are decoded
 * from nfs_readdir by calling the decode_entry function directly.
 */
static int
nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
		 u64 cookie, struct page **pages, unsigned int count, int plus)
{
	struct inode		*dir = dentry->d_inode;
	struct nfs_readdirargs	arg = {
		.fh		= NFS_FH(dir),
		.cookie		= cookie,
		.count		= count,
		.pages		= pages,
	};
	struct rpc_message	msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_READDIR],
		.rpc_argp	= &arg,
		.rpc_cred	= cred,
	};
	int			status;

	dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);

	nfs_invalidate_atime(dir);

	dprintk("NFS reply readdir: %d\n", status);
	return status;
}

static int
nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
			struct nfs_fsstat *stat)
{
	struct nfs2_fsstat fsinfo;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
		.rpc_argp	= fhandle,
		.rpc_resp	= &fsinfo,
	};
	int	status;

	dprintk("NFS call  statfs\n");
	nfs_fattr_init(stat->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply statfs: %d\n", status);
	if (status)
		goto out;
	stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
	stat->fbytes = (u64)fsinfo.bfree  * fsinfo.bsize;
	stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
	stat->tfiles = 0;
	stat->ffiles = 0;
	stat->afiles = 0;
out:
	return status;
}

static int
nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
			struct nfs_fsinfo *info)
{
	struct nfs2_fsstat fsinfo;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
		.rpc_argp	= fhandle,
		.rpc_resp	= &fsinfo,
	};
	int	status;

	dprintk("NFS call  fsinfo\n");
	nfs_fattr_init(info->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply fsinfo: %d\n", status);
	if (status)
		goto out;
	info->rtmax  = NFS_MAXDATA;
	info->rtpref = fsinfo.tsize;
	info->rtmult = fsinfo.bsize;
	info->wtmax  = NFS_MAXDATA;
	info->wtpref = fsinfo.tsize;
	info->wtmult = fsinfo.bsize;
	info->dtpref = fsinfo.tsize;
	info->maxfilesize = 0x7FFFFFFF;
	info->lease_time = 0;
out:
	return status;
}

static int
nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
		  struct nfs_pathconf *info)
{
	info->max_link = 0;
	info->max_namelen = NFS2_MAXNAMLEN;
	return 0;
}

static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
	struct inode *inode = data->header->inode;

	nfs_invalidate_atime(inode);
	if (task->tk_status >= 0) {
		nfs_refresh_inode(inode, data->res.fattr);
		/* Emulate the eof flag, which isn't normally needed in NFSv2
		 * as it is guaranteed to always return the file attributes
		 */
		if (data->args.offset + data->res.count >= data->res.fattr->size)
			data->res.eof = 1;
	}
	return 0;
}

static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
{
	msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
}

static void nfs_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
{
	rpc_call_start(task);
}

static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
	struct inode *inode = data->header->inode;

	if (task->tk_status >= 0)
		nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
	return 0;
}

static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
	/* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
	data->args.stable = NFS_FILE_SYNC;
	msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
}
예제 #3
0
파일: nfs3proc.c 프로젝트: a342604203/nfs
static int
nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
    struct nfs3_linkargs	arg = {
        .fromfh		= NFS_FH(inode),
        .tofh		= NFS_FH(dir),
        .toname		= name->name,
        .tolen		= name->len
    };
    struct nfs3_linkres	res;
    struct rpc_message msg = {
        .rpc_proc	= &nfs3_procedures[NFS3PROC_LINK],
        .rpc_argp	= &arg,
        .rpc_resp	= &res,
    };
    int status = -ENOMEM;

    dprintk("NFS call  link %s\n", name->name);
    res.fattr = nfs_alloc_fattr();
    res.dir_attr = nfs_alloc_fattr();
    if (res.fattr == NULL || res.dir_attr == NULL)
        goto out;

    zql_control_test(NFS_SERVER(inode));
    status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
    nfs_post_op_update_inode(dir, res.dir_attr);
    nfs_post_op_update_inode(inode, res.fattr);
out:
    nfs_free_fattr(res.dir_attr);
    nfs_free_fattr(res.fattr);
    dprintk("NFS reply link: %d\n", status);
    return status;
}

static int
nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
                  unsigned int len, struct iattr *sattr)
{
    struct nfs3_createdata *data;
    int status = -ENOMEM;

    if (len > NFS3_MAXPATHLEN)
        return -ENAMETOOLONG;

    dprintk("NFS call  symlink %pd\n", dentry);

    data = nfs3_alloc_createdata();
    if (data == NULL)
        goto out;
    data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
    data->arg.symlink.fromfh = NFS_FH(dir);
    data->arg.symlink.fromname = dentry->d_name.name;
    data->arg.symlink.fromlen = dentry->d_name.len;
    data->arg.symlink.pages = &page;
    data->arg.symlink.pathlen = len;
    data->arg.symlink.sattr = sattr;

    zql_control_test(NFS_SERVER(dir));
    status = nfs3_do_create(dir, dentry, data);

    nfs3_free_createdata(data);
out:
    dprintk("NFS reply symlink: %d\n", status);
    return status;
}

static int
nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
    struct posix_acl *default_acl, *acl;
    struct nfs3_createdata *data;
    int status = -ENOMEM;

    dprintk("NFS call  mkdir %pd\n", dentry);

    data = nfs3_alloc_createdata();
    if (data == NULL)
        goto out;

    status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
    if (status)
        goto out;

    data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
    data->arg.mkdir.fh = NFS_FH(dir);
    data->arg.mkdir.name = dentry->d_name.name;
    data->arg.mkdir.len = dentry->d_name.len;
    data->arg.mkdir.sattr = sattr;

    zql_control_test(NFS_SERVER(dir));
    status = nfs3_do_create(dir, dentry, data);
    if (status != 0)
        goto out_release_acls;

    status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);

out_release_acls:
    posix_acl_release(acl);
    posix_acl_release(default_acl);
out:
    nfs3_free_createdata(data);
    dprintk("NFS reply mkdir: %d\n", status);
    return status;
}

static int
nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
{
    struct nfs_fattr	*dir_attr;
    struct nfs3_diropargs	arg = {
        .fh		= NFS_FH(dir),
        .name		= name->name,
        .len		= name->len
    };
    struct rpc_message msg = {
        .rpc_proc	= &nfs3_procedures[NFS3PROC_RMDIR],
        .rpc_argp	= &arg,
    };
    int status = -ENOMEM;

    dprintk("NFS call  rmdir %s\n", name->name);
    dir_attr = nfs_alloc_fattr();
    if (dir_attr == NULL)
        goto out;

    msg.rpc_resp = dir_attr;
    zql_control_test(NFS_SERVER(dir));
    status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
    nfs_post_op_update_inode(dir, dir_attr);
    nfs_free_fattr(dir_attr);
out:
    dprintk("NFS reply rmdir: %d\n", status);
    return status;
}

/*
 * The READDIR implementation is somewhat hackish - we pass the user buffer
 * to the encode function, which installs it in the receive iovec.
 * The decode function itself doesn't perform any decoding, it just makes
 * sure the reply is syntactically correct.
 *
 * Also note that this implementation handles both plain readdir and
 * readdirplus.
 */
static int
nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
                  u64 cookie, struct page **pages, unsigned int count, int plus)
{
    struct inode		*dir = dentry->d_inode;
    __be32			*verf = NFS_I(dir)->cookieverf;
    struct nfs3_readdirargs	arg = {
        .fh		= NFS_FH(dir),
        .cookie		= cookie,
        .verf		= {verf[0], verf[1]},
        .plus		= plus,
        .count		= count,
        .pages		= pages
    };
    struct nfs3_readdirres	res = {
        .verf		= verf,
        .plus		= plus
    };
    struct rpc_message	msg = {
        .rpc_proc	= &nfs3_procedures[NFS3PROC_READDIR],
        .rpc_argp	= &arg,
        .rpc_resp	= &res,
        .rpc_cred	= cred
    };
    int status = -ENOMEM;

    if (plus)
        msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];

    dprintk("NFS call  readdir%s %d\n",
            plus? "plus" : "", (unsigned int) cookie);

    res.dir_attr = nfs_alloc_fattr();
    if (res.dir_attr == NULL)
        goto out;

    zql_control_test(NFS_SERVER(dir));
    status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);

    nfs_invalidate_atime(dir);
    nfs_refresh_inode(dir, res.dir_attr);

    nfs_free_fattr(res.dir_attr);
out:
    dprintk("NFS reply readdir%s: %d\n",
            plus? "plus" : "", status);
    return status;
}

static int
nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
                dev_t rdev)
{
    struct posix_acl *default_acl, *acl;
    struct nfs3_createdata *data;
    int status = -ENOMEM;

    dprintk("NFS call  mknod %pd %u:%u\n", dentry,
            MAJOR(rdev), MINOR(rdev));

    data = nfs3_alloc_createdata();
    if (data == NULL)
        goto out;

    status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
    if (status)
        goto out;

    data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
    data->arg.mknod.fh = NFS_FH(dir);
    data->arg.mknod.name = dentry->d_name.name;
    data->arg.mknod.len = dentry->d_name.len;
    data->arg.mknod.sattr = sattr;
    data->arg.mknod.rdev = rdev;

    switch (sattr->ia_mode & S_IFMT) {
    case S_IFBLK:
        data->arg.mknod.type = NF3BLK;
        break;
    case S_IFCHR:
        data->arg.mknod.type = NF3CHR;
        break;
    case S_IFIFO:
        data->arg.mknod.type = NF3FIFO;
        break;
    case S_IFSOCK:
        data->arg.mknod.type = NF3SOCK;
        break;
    default:
        status = -EINVAL;
        goto out;
    }

    zql_control_test(NFS_SERVER(dir));
    status = nfs3_do_create(dir, dentry, data);
    if (status != 0)
        goto out_release_acls;

    status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);

out_release_acls:
    posix_acl_release(acl);
    posix_acl_release(default_acl);
out:
    nfs3_free_createdata(data);
    dprintk("NFS reply mknod: %d\n", status);
    return status;
}

static int
nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
                 struct nfs_fsstat *stat)
{
    struct rpc_message msg = {
        .rpc_proc	= &nfs3_procedures[NFS3PROC_FSSTAT],
        .rpc_argp	= fhandle,
        .rpc_resp	= stat,
    };
    int	status;

    dprintk("NFS call  fsstat\n");
    nfs_fattr_init(stat->fattr);
    zql_control_test(server);
    status = rpc_call_sync(server->client, &msg, 0);
    dprintk("NFS reply fsstat: %d\n", status);
    return status;
}

static int
do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
               struct nfs_fsinfo *info)
{
    struct rpc_message msg = {
        .rpc_proc	= &nfs3_procedures[NFS3PROC_FSINFO],
        .rpc_argp	= fhandle,
        .rpc_resp	= info,
    };
    int	status;

    dprintk("NFS call  fsinfo\n");
    nfs_fattr_init(info->fattr);
    status = rpc_call_sync(client, &msg, 0);
    dprintk("NFS reply fsinfo: %d\n", status);
    return status;
}

/*
 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 * nfs_create_server
 */
static int
nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
                 struct nfs_fsinfo *info)
{
    int	status;

    zql_control_test(server);
    status = do_proc_fsinfo(server->client, fhandle, info);
    if (status && server->nfs_client->cl_rpcclient != server->client)
        status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
    return status;
}
예제 #4
0
파일: nfs3proc.c 프로젝트: a342604203/nfs
static int
nfs3_proc_lookup(struct inode *dir, struct qstr *name,
                 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
                 struct nfs4_label *label)
{
    struct nfs3_diropargs	arg = {
        .fh		= NFS_FH(dir),
        .name		= name->name,
        .len		= name->len
    };
    struct nfs3_diropres	res = {
        .fh		= fhandle,
        .fattr		= fattr
    };
    struct rpc_message msg = {
        .rpc_proc	= &nfs3_procedures[NFS3PROC_LOOKUP],
        .rpc_argp	= &arg,
        .rpc_resp	= &res,
    };
    int			status;

    dprintk("NFS call  lookup %s\n", name->name);
    res.dir_attr = nfs_alloc_fattr();
    if (res.dir_attr == NULL)
        return -ENOMEM;

    nfs_fattr_init(fattr);
    zql_control_test(NFS_SERVER(dir));
    status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
    nfs_refresh_inode(dir, res.dir_attr);
    if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
        msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
        msg.rpc_argp = fhandle;
        msg.rpc_resp = fattr;
        status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
    }
    nfs_free_fattr(res.dir_attr);
    dprintk("NFS reply lookup: %d\n", status);
    return status;
}

static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
{
    struct nfs3_accessargs	arg = {
        .fh		= NFS_FH(inode),
    };
    struct nfs3_accessres	res;
    struct rpc_message msg = {
        .rpc_proc	= &nfs3_procedures[NFS3PROC_ACCESS],
        .rpc_argp	= &arg,
        .rpc_resp	= &res,
        .rpc_cred	= entry->cred,
    };
    int mode = entry->mask;
    int status = -ENOMEM;

    dprintk("NFS call  access\n");

    if (mode & MAY_READ)
        arg.access |= NFS3_ACCESS_READ;
    if (S_ISDIR(inode->i_mode)) {
        if (mode & MAY_WRITE)
            arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
        if (mode & MAY_EXEC)
            arg.access |= NFS3_ACCESS_LOOKUP;
    } else {
        if (mode & MAY_WRITE)
            arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
        if (mode & MAY_EXEC)
            arg.access |= NFS3_ACCESS_EXECUTE;
    }

    res.fattr = nfs_alloc_fattr();
    if (res.fattr == NULL)
        goto out;

    zql_control_test(NFS_SERVER(inode));
    status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
    nfs_refresh_inode(inode, res.fattr);
    if (status == 0) {
        entry->mask = 0;
        if (res.access & NFS3_ACCESS_READ)
            entry->mask |= MAY_READ;
        if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
            entry->mask |= MAY_WRITE;
        if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
            entry->mask |= MAY_EXEC;
    }
    nfs_free_fattr(res.fattr);
out:
    dprintk("NFS reply access: %d\n", status);
    return status;
}

static int nfs3_proc_readlink(struct inode *inode, struct page *page,
                              unsigned int pgbase, unsigned int pglen)
{
    struct nfs_fattr	*fattr;
    struct nfs3_readlinkargs args = {
        .fh		= NFS_FH(inode),
        .pgbase		= pgbase,
        .pglen		= pglen,
        .pages		= &page
    };
    struct rpc_message msg = {
        .rpc_proc	= &nfs3_procedures[NFS3PROC_READLINK],
        .rpc_argp	= &args,
    };
    int status = -ENOMEM;

    dprintk("NFS call  readlink\n");
    fattr = nfs_alloc_fattr();
    if (fattr == NULL)
        goto out;
    msg.rpc_resp = fattr;

    zql_control_test(NFS_SERVER(inode));
    status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
    nfs_refresh_inode(inode, fattr);
    nfs_free_fattr(fattr);
out:
    dprintk("NFS reply readlink: %d\n", status);
    return status;
}

struct nfs3_createdata {
    struct rpc_message msg;
    union {
        struct nfs3_createargs create;
        struct nfs3_mkdirargs mkdir;
        struct nfs3_symlinkargs symlink;
        struct nfs3_mknodargs mknod;
    } arg;
    struct nfs3_diropres res;
    struct nfs_fh fh;
    struct nfs_fattr fattr;
    struct nfs_fattr dir_attr;
};

static struct nfs3_createdata *nfs3_alloc_createdata(void)
{
    struct nfs3_createdata *data;

    data = kzalloc(sizeof(*data), GFP_KERNEL);
    if (data != NULL) {
        data->msg.rpc_argp = &data->arg;
        data->msg.rpc_resp = &data->res;
        data->res.fh = &data->fh;
        data->res.fattr = &data->fattr;
        data->res.dir_attr = &data->dir_attr;
        nfs_fattr_init(data->res.fattr);
        nfs_fattr_init(data->res.dir_attr);
    }
    return data;
}

static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
{
    int status;

    status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
    nfs_post_op_update_inode(dir, data->res.dir_attr);
    if (status == 0)
        status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
    return status;
}

static void nfs3_free_createdata(struct nfs3_createdata *data)
{
    kfree(data);
}
예제 #5
0
파일: proc.c 프로젝트: 119-org/hi3518-osdrv
static int
nfs_proc_remove(struct inode *dir, struct qstr *name)
{
	struct nfs_removeargs arg = {
		.fh = NFS_FH(dir),
		.name.len = name->len,
		.name.name = name->name,
	};
	struct rpc_message msg = { 
		.rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
		.rpc_argp = &arg,
	};
	int			status;

	dprintk("NFS call  remove %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);

	dprintk("NFS reply remove: %d\n", status);
	return status;
}

static void
nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
{
	msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
}

static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
{
	if (nfs_async_handle_expired_key(task))
		return 0;
	nfs_mark_for_revalidate(dir);
	return 1;
}

static void
nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
{
	msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME];
}

static int
nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
		     struct inode *new_dir)
{
	if (nfs_async_handle_expired_key(task))
		return 0;
	nfs_mark_for_revalidate(old_dir);
	nfs_mark_for_revalidate(new_dir);
	return 1;
}

static int
nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
		struct inode *new_dir, struct qstr *new_name)
{
	struct nfs_renameargs	arg = {
		.old_dir	= NFS_FH(old_dir),
		.old_name	= old_name,
		.new_dir	= NFS_FH(new_dir),
		.new_name	= new_name,
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_RENAME],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
	status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
	nfs_mark_for_revalidate(old_dir);
	nfs_mark_for_revalidate(new_dir);
	dprintk("NFS reply rename: %d\n", status);
	return status;
}

static int
nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
	struct nfs_linkargs	arg = {
		.fromfh		= NFS_FH(inode),
		.tofh		= NFS_FH(dir),
		.toname		= name->name,
		.tolen		= name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_LINK],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  link %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
	nfs_mark_for_revalidate(inode);
	nfs_mark_for_revalidate(dir);
	dprintk("NFS reply link: %d\n", status);
	return status;
}

static int
nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
		 unsigned int len, struct iattr *sattr)
{
	struct nfs_fh *fh;
	struct nfs_fattr *fattr;
	struct nfs_symlinkargs	arg = {
		.fromfh		= NFS_FH(dir),
		.fromname	= dentry->d_name.name,
		.fromlen	= dentry->d_name.len,
		.pages		= &page,
		.pathlen	= len,
		.sattr		= sattr
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_SYMLINK],
		.rpc_argp	= &arg,
	};
	int status = -ENAMETOOLONG;

	dprintk("NFS call  symlink %s\n", dentry->d_name.name);

	if (len > NFS2_MAXPATHLEN)
		goto out;

	fh = nfs_alloc_fhandle();
	fattr = nfs_alloc_fattr();
	status = -ENOMEM;
	if (fh == NULL || fattr == NULL)
		goto out_free;

	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);

	/*
	 * V2 SYMLINK requests don't return any attributes.  Setting the
	 * filehandle size to zero indicates to nfs_instantiate that it
	 * should fill in the data with a LOOKUP call on the wire.
	 */
	if (status == 0)
		status = nfs_instantiate(dentry, fh, fattr);

out_free:
	nfs_free_fattr(fattr);
	nfs_free_fhandle(fh);
out:
	dprintk("NFS reply symlink: %d\n", status);
	return status;
}

static int
nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
	struct nfs_createdata *data;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_MKDIR],
	};
	int status = -ENOMEM;

	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
	data = nfs_alloc_createdata(dir, dentry, sattr);
	if (data == NULL)
		goto out;
	msg.rpc_argp = &data->arg;
	msg.rpc_resp = &data->res;

	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);
	if (status == 0)
		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
	nfs_free_createdata(data);
out:
	dprintk("NFS reply mkdir: %d\n", status);
	return status;
}

static int
nfs_proc_rmdir(struct inode *dir, struct qstr *name)
{
	struct nfs_diropargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= name->name,
		.len		= name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_RMDIR],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  rmdir %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);
	dprintk("NFS reply rmdir: %d\n", status);
	return status;
}

/*
 * The READDIR implementation is somewhat hackish - we pass a temporary
 * buffer to the encode function, which installs it in the receive
 * the receive iovec. The decode function just parses the reply to make
 * sure it is syntactically correct; the entries itself are decoded
 * from nfs_readdir by calling the decode_entry function directly.
 */
static int
nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
		 u64 cookie, struct page **pages, unsigned int count, int plus)
{
	struct inode		*dir = dentry->d_inode;
	struct nfs_readdirargs	arg = {
		.fh		= NFS_FH(dir),
		.cookie		= cookie,
		.count		= count,
		.pages		= pages,
	};
	struct rpc_message	msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_READDIR],
		.rpc_argp	= &arg,
		.rpc_cred	= cred,
	};
	int			status;

	dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);

	nfs_invalidate_atime(dir);

	dprintk("NFS reply readdir: %d\n", status);
	return status;
}

static int
nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
			struct nfs_fsstat *stat)
{
	struct nfs2_fsstat fsinfo;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
		.rpc_argp	= fhandle,
		.rpc_resp	= &fsinfo,
	};
	int	status;

	dprintk("NFS call  statfs\n");
	nfs_fattr_init(stat->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply statfs: %d\n", status);
	if (status)
		goto out;
	stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
	stat->fbytes = (u64)fsinfo.bfree  * fsinfo.bsize;
	stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
	stat->tfiles = 0;
	stat->ffiles = 0;
	stat->afiles = 0;
out:
	return status;
}

static int
nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
			struct nfs_fsinfo *info)
{
	struct nfs2_fsstat fsinfo;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
		.rpc_argp	= fhandle,
		.rpc_resp	= &fsinfo,
	};
	int	status;

	dprintk("NFS call  fsinfo\n");
	nfs_fattr_init(info->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply fsinfo: %d\n", status);
	if (status)
		goto out;
	info->rtmax  = NFS_MAXDATA;
	info->rtpref = fsinfo.tsize;
	info->rtmult = fsinfo.bsize;
	info->wtmax  = NFS_MAXDATA;
	info->wtpref = fsinfo.tsize;
	info->wtmult = fsinfo.bsize;
	info->dtpref = fsinfo.tsize;
	info->maxfilesize = 0x7FFFFFFF;
	info->lease_time = 0;
out:
	return status;
}

static int
nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
		  struct nfs_pathconf *info)
{
	info->max_link = 0;
	info->max_namelen = NFS2_MAXNAMLEN;
	return 0;
}

static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
	if (nfs_async_handle_expired_key(task))
		return -EAGAIN;

	nfs_invalidate_atime(data->inode);
	if (task->tk_status >= 0) {
		nfs_refresh_inode(data->inode, data->res.fattr);
		/* Emulate the eof flag, which isn't normally needed in NFSv2
		 * as it is guaranteed to always return the file attributes
		 */
		if (data->args.offset + data->args.count >= data->res.fattr->size)
			data->res.eof = 1;
	}
	return 0;
}

static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
{
	msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
}

static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
	if (nfs_async_handle_expired_key(task))
		return -EAGAIN;

	if (task->tk_status >= 0)
		nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
	return 0;
}

static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
	/* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
	data->args.stable = NFS_FILE_SYNC;
	msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
}

static void
nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
	BUG();
}

static int
nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
{
	struct inode *inode = filp->f_path.dentry->d_inode;

	return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
}

/* Helper functions for NFS lock bounds checking */
#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
static int nfs_lock_check_bounds(const struct file_lock *fl)
{
	__s32 start, end;

	start = (__s32)fl->fl_start;
	if ((loff_t)start != fl->fl_start)
		goto out_einval;

	if (fl->fl_end != OFFSET_MAX) {
		end = (__s32)fl->fl_end;
		if ((loff_t)end != fl->fl_end)
			goto out_einval;
	} else
		end = NFS_LOCK32_OFFSET_MAX;

	if (start < 0 || start > end)
		goto out_einval;
	return 0;
out_einval:
	return -EINVAL;
}

const struct nfs_rpc_ops nfs_v2_clientops = {
	.version	= 2,		       /* protocol version */
	.dentry_ops	= &nfs_dentry_operations,
	.dir_inode_ops	= &nfs_dir_inode_operations,
	.file_inode_ops	= &nfs_file_inode_operations,
	.getroot	= nfs_proc_get_root,
	.getattr	= nfs_proc_getattr,
	.setattr	= nfs_proc_setattr,
	.lookup		= nfs_proc_lookup,
	.access		= NULL,		       /* access */
	.readlink	= nfs_proc_readlink,
	.create		= nfs_proc_create,
	.remove		= nfs_proc_remove,
	.unlink_setup	= nfs_proc_unlink_setup,
	.unlink_done	= nfs_proc_unlink_done,
	.rename		= nfs_proc_rename,
	.rename_setup	= nfs_proc_rename_setup,
	.rename_done	= nfs_proc_rename_done,
	.link		= nfs_proc_link,
	.symlink	= nfs_proc_symlink,
	.mkdir		= nfs_proc_mkdir,
	.rmdir		= nfs_proc_rmdir,
	.readdir	= nfs_proc_readdir,
	.mknod		= nfs_proc_mknod,
	.statfs		= nfs_proc_statfs,
	.fsinfo		= nfs_proc_fsinfo,
	.pathconf	= nfs_proc_pathconf,
	.decode_dirent	= nfs2_decode_dirent,
	.read_setup	= nfs_proc_read_setup,
	.read_done	= nfs_read_done,
	.write_setup	= nfs_proc_write_setup,
	.write_done	= nfs_write_done,
	.commit_setup	= nfs_proc_commit_setup,
	.lock		= nfs_proc_lock,
	.lock_check_bounds = nfs_lock_check_bounds,
	.close_context	= nfs_close_context,
	.init_client	= nfs_init_client,
};
예제 #6
0
파일: nfs3acl.c 프로젝트: 020gzh/linux
struct posix_acl *nfs3_get_acl(struct inode *inode, int type)
{
	struct nfs_server *server = NFS_SERVER(inode);
	struct page *pages[NFSACL_MAXPAGES] = { };
	struct nfs3_getaclargs args = {
		.fh = NFS_FH(inode),
		/* The xdr layer may allocate pages here. */
		.pages = pages,
	};
	struct nfs3_getaclres res = {
		NULL,
	};
	struct rpc_message msg = {
		.rpc_argp	= &args,
		.rpc_resp	= &res,
	};
	int status, count;

	if (!nfs_server_capable(inode, NFS_CAP_ACLS))
		return ERR_PTR(-EOPNOTSUPP);

	status = nfs_revalidate_inode(server, inode);
	if (status < 0)
		return ERR_PTR(status);

	/*
	 * Only get the access acl when explicitly requested: We don't
	 * need it for access decisions, and only some applications use
	 * it. Applications which request the access acl first are not
	 * penalized from this optimization.
	 */
	if (type == ACL_TYPE_ACCESS)
		args.mask |= NFS_ACLCNT|NFS_ACL;
	if (S_ISDIR(inode->i_mode))
		args.mask |= NFS_DFACLCNT|NFS_DFACL;
	if (args.mask == 0)
		return NULL;

	dprintk("NFS call getacl\n");
	msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_GETACL];
	res.fattr = nfs_alloc_fattr();
	if (res.fattr == NULL)
		return ERR_PTR(-ENOMEM);

	status = rpc_call_sync(server->client_acl, &msg, 0);
	dprintk("NFS reply getacl: %d\n", status);

	/* pages may have been allocated at the xdr layer. */
	for (count = 0; count < NFSACL_MAXPAGES && args.pages[count]; count++)
		__free_page(args.pages[count]);

	switch (status) {
		case 0:
			status = nfs_refresh_inode(inode, res.fattr);
			break;
		case -EPFNOSUPPORT:
		case -EPROTONOSUPPORT:
			dprintk("NFS_V3_ACL extension not supported; disabling\n");
			server->caps &= ~NFS_CAP_ACLS;
		case -ENOTSUPP:
			status = -EOPNOTSUPP;
		default:
			goto getout;
	}
	if ((args.mask & res.mask) != args.mask) {
		status = -EIO;
		goto getout;
	}

	if (res.acl_access != NULL) {
		if ((posix_acl_equiv_mode(res.acl_access, NULL) == 0) ||
		    res.acl_access->a_count == 0) {
			posix_acl_release(res.acl_access);
			res.acl_access = NULL;
		}
	}

	if (res.mask & NFS_ACL)
		set_cached_acl(inode, ACL_TYPE_ACCESS, res.acl_access);
	else
		forget_cached_acl(inode, ACL_TYPE_ACCESS);

	if (res.mask & NFS_DFACL)
		set_cached_acl(inode, ACL_TYPE_DEFAULT, res.acl_default);
	else
		forget_cached_acl(inode, ACL_TYPE_DEFAULT);

	nfs_free_fattr(res.fattr);
	if (type == ACL_TYPE_ACCESS) {
		posix_acl_release(res.acl_default);
		return res.acl_access;
	} else {
		posix_acl_release(res.acl_access);
		return res.acl_default;
	}

getout:
	posix_acl_release(res.acl_access);
	posix_acl_release(res.acl_default);
	nfs_free_fattr(res.fattr);
	return ERR_PTR(status);
}
예제 #7
0
파일: nfs3acl.c 프로젝트: 020gzh/linux
	if (args.len > NFS_ACL_INLINE_BUFSIZE) {
		unsigned int npages = 1 + ((args.len - 1) >> PAGE_SHIFT);

		status = -ENOMEM;
		do {
			args.pages[args.npages] = alloc_page(GFP_KERNEL);
			if (args.pages[args.npages] == NULL)
				goto out_freepages;
			args.npages++;
		} while (args.npages < npages);
	}

	dprintk("NFS call setacl\n");
	status = -ENOMEM;
	fattr = nfs_alloc_fattr();
	if (fattr == NULL)
		goto out_freepages;

	msg.rpc_proc = &server->client_acl->cl_procinfo[ACLPROC3_SETACL];
	msg.rpc_resp = fattr;
	status = rpc_call_sync(server->client_acl, &msg, 0);
	nfs_access_zap_cache(inode);
	nfs_zap_acl_cache(inode);
	dprintk("NFS reply setacl: %d\n", status);

	switch (status) {
		case 0:
			status = nfs_refresh_inode(inode, fattr);
			set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
			set_cached_acl(inode, ACL_TYPE_DEFAULT, dfacl);
예제 #8
0
static int
nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
	struct nfs_linkargs	arg = {
		.fromfh		= NFS_FH(inode),
		.tofh		= NFS_FH(dir),
		.toname		= name->name,
		.tolen		= name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_LINK],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  link %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
	nfs_mark_for_revalidate(inode);
	nfs_mark_for_revalidate(dir);
	dprintk("NFS reply link: %d\n", status);
	return status;
}

static int
nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
		 unsigned int len, struct iattr *sattr)
{
	struct nfs_fh *fh;
	struct nfs_fattr *fattr;
	struct nfs_symlinkargs	arg = {
		.fromfh		= NFS_FH(dir),
		.fromname	= dentry->d_name.name,
		.fromlen	= dentry->d_name.len,
		.pages		= &page,
		.pathlen	= len,
		.sattr		= sattr
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_SYMLINK],
		.rpc_argp	= &arg,
	};
	int status = -ENAMETOOLONG;

	dprintk("NFS call  symlink %s\n", dentry->d_name.name);

	if (len > NFS2_MAXPATHLEN)
		goto out;

	fh = nfs_alloc_fhandle();
	fattr = nfs_alloc_fattr();
	status = -ENOMEM;
	if (fh == NULL || fattr == NULL)
		goto out_free;

	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);

	/*
                                                                 
                                                                
                                                           
  */
	if (status == 0)
		status = nfs_instantiate(dentry, fh, fattr);

out_free:
	nfs_free_fattr(fattr);
	nfs_free_fhandle(fh);
out:
	dprintk("NFS reply symlink: %d\n", status);
	return status;
}

static int
nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
	struct nfs_createdata *data;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_MKDIR],
	};
	int status = -ENOMEM;

	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
	data = nfs_alloc_createdata(dir, dentry, sattr);
	if (data == NULL)
		goto out;
	msg.rpc_argp = &data->arg;
	msg.rpc_resp = &data->res;

	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);
	if (status == 0)
		status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
	nfs_free_createdata(data);
out:
	dprintk("NFS reply mkdir: %d\n", status);
	return status;
}

static int
nfs_proc_rmdir(struct inode *dir, struct qstr *name)
{
	struct nfs_diropargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= name->name,
		.len		= name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_RMDIR],
		.rpc_argp	= &arg,
	};
	int			status;

	dprintk("NFS call  rmdir %s\n", name->name);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_mark_for_revalidate(dir);
	dprintk("NFS reply rmdir: %d\n", status);
	return status;
}

/*
                                                                       
                                                                  
                                                                       
                                                                   
                                                                  
 */
static int
nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
		 u64 cookie, struct page **pages, unsigned int count, int plus)
{
	struct inode		*dir = dentry->d_inode;
	struct nfs_readdirargs	arg = {
		.fh		= NFS_FH(dir),
		.cookie		= cookie,
		.count		= count,
		.pages		= pages,
	};
	struct rpc_message	msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_READDIR],
		.rpc_argp	= &arg,
		.rpc_cred	= cred,
	};
	int			status;

	dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);

	nfs_invalidate_atime(dir);

	dprintk("NFS reply readdir: %d\n", status);
	return status;
}

static int
nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
			struct nfs_fsstat *stat)
{
	struct nfs2_fsstat fsinfo;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
		.rpc_argp	= fhandle,
		.rpc_resp	= &fsinfo,
	};
	int	status;

	dprintk("NFS call  statfs\n");
	nfs_fattr_init(stat->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply statfs: %d\n", status);
	if (status)
		goto out;
	stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
	stat->fbytes = (u64)fsinfo.bfree  * fsinfo.bsize;
	stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
	stat->tfiles = 0;
	stat->ffiles = 0;
	stat->afiles = 0;
out:
	return status;
}

static int
nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
			struct nfs_fsinfo *info)
{
	struct nfs2_fsstat fsinfo;
	struct rpc_message msg = {
		.rpc_proc	= &nfs_procedures[NFSPROC_STATFS],
		.rpc_argp	= fhandle,
		.rpc_resp	= &fsinfo,
	};
	int	status;

	dprintk("NFS call  fsinfo\n");
	nfs_fattr_init(info->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply fsinfo: %d\n", status);
	if (status)
		goto out;
	info->rtmax  = NFS_MAXDATA;
	info->rtpref = fsinfo.tsize;
	info->rtmult = fsinfo.bsize;
	info->wtmax  = NFS_MAXDATA;
	info->wtpref = fsinfo.tsize;
	info->wtmult = fsinfo.bsize;
	info->dtpref = fsinfo.tsize;
	info->maxfilesize = 0x7FFFFFFF;
	info->lease_time = 0;
out:
	return status;
}

static int
nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
		  struct nfs_pathconf *info)
{
	info->max_link = 0;
	info->max_namelen = NFS2_MAXNAMLEN;
	return 0;
}

static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
	if (nfs_async_handle_expired_key(task))
		return -EAGAIN;

	nfs_invalidate_atime(data->inode);
	if (task->tk_status >= 0) {
		nfs_refresh_inode(data->inode, data->res.fattr);
		/*                                                           
                                                             
   */
		if (data->args.offset + data->args.count >= data->res.fattr->size)
			data->res.eof = 1;
	}
	return 0;
}

static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
{
	msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
}

static void nfs_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
{
	rpc_call_start(task);
}

static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
	if (nfs_async_handle_expired_key(task))
		return -EAGAIN;

	if (task->tk_status >= 0)
		nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
	return 0;
}

static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
	/*                                                           */
	data->args.stable = NFS_FILE_SYNC;
	msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
}
예제 #9
0
static int
nfs3_proc_remove(struct inode *dir, struct qstr *name)
{
	struct nfs_removeargs arg = {
		.fh = NFS_FH(dir),
		.name.len = name->len,
		.name.name = name->name,
	};
	struct nfs_removeres res;
	struct rpc_message msg = {
		.rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
		.rpc_argp = &arg,
		.rpc_resp = &res,
	};
	int status = -ENOMEM;

	dprintk("NFS call  remove %s\n", name->name);
	res.dir_attr = nfs_alloc_fattr();
	if (res.dir_attr == NULL)
		goto out;

	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_post_op_update_inode(dir, res.dir_attr);
	nfs_free_fattr(res.dir_attr);
out:
	dprintk("NFS reply remove: %d\n", status);
	return status;
}

static void
nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
{
	msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
}

static int
nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
{
	struct nfs_removeres *res;
	if (nfs3_async_handle_jukebox(task, dir))
		return 0;
	res = task->tk_msg.rpc_resp;
	nfs_post_op_update_inode(dir, res->dir_attr);
	return 1;
}

static void
nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
{
	msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
}

static int
nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
		      struct inode *new_dir)
{
	struct nfs_renameres *res;

	if (nfs3_async_handle_jukebox(task, old_dir))
		return 0;
	res = task->tk_msg.rpc_resp;

	nfs_post_op_update_inode(old_dir, res->old_fattr);
	nfs_post_op_update_inode(new_dir, res->new_fattr);
	return 1;
}

static int
nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
		 struct inode *new_dir, struct qstr *new_name)
{
	struct nfs_renameargs	arg = {
		.old_dir	= NFS_FH(old_dir),
		.old_name	= old_name,
		.new_dir	= NFS_FH(new_dir),
		.new_name	= new_name,
	};
	struct nfs_renameres res;
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_RENAME],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
	};
	int status = -ENOMEM;

	dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);

	res.old_fattr = nfs_alloc_fattr();
	res.new_fattr = nfs_alloc_fattr();
	if (res.old_fattr == NULL || res.new_fattr == NULL)
		goto out;

	status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
	nfs_post_op_update_inode(old_dir, res.old_fattr);
	nfs_post_op_update_inode(new_dir, res.new_fattr);
out:
	nfs_free_fattr(res.old_fattr);
	nfs_free_fattr(res.new_fattr);
	dprintk("NFS reply rename: %d\n", status);
	return status;
}

static int
nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
{
	struct nfs3_linkargs	arg = {
		.fromfh		= NFS_FH(inode),
		.tofh		= NFS_FH(dir),
		.toname		= name->name,
		.tolen		= name->len
	};
	struct nfs3_linkres	res;
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_LINK],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
	};
	int status = -ENOMEM;

	dprintk("NFS call  link %s\n", name->name);
	res.fattr = nfs_alloc_fattr();
	res.dir_attr = nfs_alloc_fattr();
	if (res.fattr == NULL || res.dir_attr == NULL)
		goto out;

	status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
	nfs_post_op_update_inode(dir, res.dir_attr);
	nfs_post_op_update_inode(inode, res.fattr);
out:
	nfs_free_fattr(res.dir_attr);
	nfs_free_fattr(res.fattr);
	dprintk("NFS reply link: %d\n", status);
	return status;
}

static int
nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
		  unsigned int len, struct iattr *sattr)
{
	struct nfs3_createdata *data;
	int status = -ENOMEM;

	if (len > NFS3_MAXPATHLEN)
		return -ENAMETOOLONG;

	dprintk("NFS call  symlink %s\n", dentry->d_name.name);

	data = nfs3_alloc_createdata();
	if (data == NULL)
		goto out;
	data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
	data->arg.symlink.fromfh = NFS_FH(dir);
	data->arg.symlink.fromname = dentry->d_name.name;
	data->arg.symlink.fromlen = dentry->d_name.len;
	data->arg.symlink.pages = &page;
	data->arg.symlink.pathlen = len;
	data->arg.symlink.sattr = sattr;

	status = nfs3_do_create(dir, dentry, data);

	nfs3_free_createdata(data);
out:
	dprintk("NFS reply symlink: %d\n", status);
	return status;
}

static int
nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
{
	struct nfs3_createdata *data;
	int mode = sattr->ia_mode;
	int status = -ENOMEM;

	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);

	sattr->ia_mode &= ~current_umask();

	data = nfs3_alloc_createdata();
	if (data == NULL)
		goto out;

	data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
	data->arg.mkdir.fh = NFS_FH(dir);
	data->arg.mkdir.name = dentry->d_name.name;
	data->arg.mkdir.len = dentry->d_name.len;
	data->arg.mkdir.sattr = sattr;

	status = nfs3_do_create(dir, dentry, data);
	if (status != 0)
		goto out;

	status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
	nfs3_free_createdata(data);
	dprintk("NFS reply mkdir: %d\n", status);
	return status;
}

static int
nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
{
	struct nfs_fattr	*dir_attr;
	struct nfs3_diropargs	arg = {
		.fh		= NFS_FH(dir),
		.name		= name->name,
		.len		= name->len
	};
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_RMDIR],
		.rpc_argp	= &arg,
	};
	int status = -ENOMEM;

	dprintk("NFS call  rmdir %s\n", name->name);
	dir_attr = nfs_alloc_fattr();
	if (dir_attr == NULL)
		goto out;

	msg.rpc_resp = dir_attr;
	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
	nfs_post_op_update_inode(dir, dir_attr);
	nfs_free_fattr(dir_attr);
out:
	dprintk("NFS reply rmdir: %d\n", status);
	return status;
}

/*
 * The READDIR implementation is somewhat hackish - we pass the user buffer
 * to the encode function, which installs it in the receive iovec.
 * The decode function itself doesn't perform any decoding, it just makes
 * sure the reply is syntactically correct.
 *
 * Also note that this implementation handles both plain readdir and
 * readdirplus.
 */
static int
nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
		  u64 cookie, struct page **pages, unsigned int count, int plus)
{
	struct inode		*dir = dentry->d_inode;
	__be32			*verf = NFS_COOKIEVERF(dir);
	struct nfs3_readdirargs	arg = {
		.fh		= NFS_FH(dir),
		.cookie		= cookie,
		.verf		= {verf[0], verf[1]},
		.plus		= plus,
		.count		= count,
		.pages		= pages
	};
	struct nfs3_readdirres	res = {
		.verf		= verf,
		.plus		= plus
	};
	struct rpc_message	msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_READDIR],
		.rpc_argp	= &arg,
		.rpc_resp	= &res,
		.rpc_cred	= cred
	};
	int status = -ENOMEM;

	if (plus)
		msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];

	dprintk("NFS call  readdir%s %d\n",
			plus? "plus" : "", (unsigned int) cookie);

	res.dir_attr = nfs_alloc_fattr();
	if (res.dir_attr == NULL)
		goto out;

	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);

	nfs_invalidate_atime(dir);
	nfs_refresh_inode(dir, res.dir_attr);

	nfs_free_fattr(res.dir_attr);
out:
	dprintk("NFS reply readdir%s: %d\n",
			plus? "plus" : "", status);
	return status;
}

static int
nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
		dev_t rdev)
{
	struct nfs3_createdata *data;
	mode_t mode = sattr->ia_mode;
	int status = -ENOMEM;

	dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
			MAJOR(rdev), MINOR(rdev));

	sattr->ia_mode &= ~current_umask();

	data = nfs3_alloc_createdata();
	if (data == NULL)
		goto out;

	data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
	data->arg.mknod.fh = NFS_FH(dir);
	data->arg.mknod.name = dentry->d_name.name;
	data->arg.mknod.len = dentry->d_name.len;
	data->arg.mknod.sattr = sattr;
	data->arg.mknod.rdev = rdev;

	switch (sattr->ia_mode & S_IFMT) {
	case S_IFBLK:
		data->arg.mknod.type = NF3BLK;
		break;
	case S_IFCHR:
		data->arg.mknod.type = NF3CHR;
		break;
	case S_IFIFO:
		data->arg.mknod.type = NF3FIFO;
		break;
	case S_IFSOCK:
		data->arg.mknod.type = NF3SOCK;
		break;
	default:
		status = -EINVAL;
		goto out;
	}

	status = nfs3_do_create(dir, dentry, data);
	if (status != 0)
		goto out;
	status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
	nfs3_free_createdata(data);
	dprintk("NFS reply mknod: %d\n", status);
	return status;
}

static int
nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
		 struct nfs_fsstat *stat)
{
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_FSSTAT],
		.rpc_argp	= fhandle,
		.rpc_resp	= stat,
	};
	int	status;

	dprintk("NFS call  fsstat\n");
	nfs_fattr_init(stat->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply fsstat: %d\n", status);
	return status;
}

static int
do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
		 struct nfs_fsinfo *info)
{
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_FSINFO],
		.rpc_argp	= fhandle,
		.rpc_resp	= info,
	};
	int	status;

	dprintk("NFS call  fsinfo\n");
	nfs_fattr_init(info->fattr);
	status = rpc_call_sync(client, &msg, 0);
	dprintk("NFS reply fsinfo: %d\n", status);
	return status;
}

/*
 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 * nfs_create_server
 */
static int
nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
		   struct nfs_fsinfo *info)
{
	int	status;

	status = do_proc_fsinfo(server->client, fhandle, info);
	if (status && server->nfs_client->cl_rpcclient != server->client)
		status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
	return status;
}

static int
nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
		   struct nfs_pathconf *info)
{
	struct rpc_message msg = {
		.rpc_proc	= &nfs3_procedures[NFS3PROC_PATHCONF],
		.rpc_argp	= fhandle,
		.rpc_resp	= info,
	};
	int	status;

	dprintk("NFS call  pathconf\n");
	nfs_fattr_init(info->fattr);
	status = rpc_call_sync(server->client, &msg, 0);
	dprintk("NFS reply pathconf: %d\n", status);
	return status;
}

static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
{
	if (nfs3_async_handle_jukebox(task, data->inode))
		return -EAGAIN;

	nfs_invalidate_atime(data->inode);
	nfs_refresh_inode(data->inode, &data->fattr);
	return 0;
}

static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
{
	msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
}

static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
	if (nfs3_async_handle_jukebox(task, data->inode))
		return -EAGAIN;
	if (task->tk_status >= 0)
		nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
	return 0;
}

static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
	msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
}

static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
{
	if (nfs3_async_handle_jukebox(task, data->inode))
		return -EAGAIN;
	nfs_refresh_inode(data->inode, data->res.fattr);
	return 0;
}

static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
	msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
}

static int
nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
{
	struct inode *inode = filp->f_path.dentry->d_inode;

	return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
}

const struct nfs_rpc_ops nfs_v3_clientops = {
	.version	= 3,			/* protocol version */
	.dentry_ops	= &nfs_dentry_operations,
	.dir_inode_ops	= &nfs3_dir_inode_operations,
	.file_inode_ops	= &nfs3_file_inode_operations,
	.file_ops	= &nfs_file_operations,
	.getroot	= nfs3_proc_get_root,
	.getattr	= nfs3_proc_getattr,
	.setattr	= nfs3_proc_setattr,
	.lookup		= nfs3_proc_lookup,
	.access		= nfs3_proc_access,
	.readlink	= nfs3_proc_readlink,
	.create		= nfs3_proc_create,
	.remove		= nfs3_proc_remove,
	.unlink_setup	= nfs3_proc_unlink_setup,
	.unlink_done	= nfs3_proc_unlink_done,
	.rename		= nfs3_proc_rename,
	.rename_setup	= nfs3_proc_rename_setup,
	.rename_done	= nfs3_proc_rename_done,
	.link		= nfs3_proc_link,
	.symlink	= nfs3_proc_symlink,
	.mkdir		= nfs3_proc_mkdir,
	.rmdir		= nfs3_proc_rmdir,
	.readdir	= nfs3_proc_readdir,
	.mknod		= nfs3_proc_mknod,
	.statfs		= nfs3_proc_statfs,
	.fsinfo		= nfs3_proc_fsinfo,
	.pathconf	= nfs3_proc_pathconf,
	.decode_dirent	= nfs3_decode_dirent,
	.read_setup	= nfs3_proc_read_setup,
	.read_done	= nfs3_read_done,
	.write_setup	= nfs3_proc_write_setup,
	.write_done	= nfs3_write_done,
	.commit_setup	= nfs3_proc_commit_setup,
	.commit_done	= nfs3_commit_done,
	.lock		= nfs3_proc_lock,
	.clear_acl_cache = nfs3_forget_cached_acls,
	.close_context	= nfs_close_context,
	.init_client	= nfs_init_client,
};
예제 #10
0
파일: nfs42proc.c 프로젝트: Chong-Li/cse522
static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
				 loff_t offset, loff_t len)
{
	struct inode *inode = file_inode(filep);
	struct nfs_server *server = NFS_SERVER(inode);
	struct nfs42_falloc_args args = {
		.falloc_fh	= NFS_FH(inode),
		.falloc_offset	= offset,
		.falloc_length	= len,
		.falloc_bitmask	= server->cache_consistency_bitmask,
	};
	struct nfs42_falloc_res res = {
		.falloc_server	= server,
	};
	int status;

	msg->rpc_argp = &args;
	msg->rpc_resp = &res;

	status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE);
	if (status)
		return status;

	res.falloc_fattr = nfs_alloc_fattr();
	if (!res.falloc_fattr)
		return -ENOMEM;

	status = nfs4_call_sync(server->client, server, msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == 0)
		status = nfs_post_op_update_inode(inode, res.falloc_fattr);

	kfree(res.falloc_fattr);
	return status;
}

static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
				loff_t offset, loff_t len)
{
	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	struct nfs4_exception exception = { };
	int err;

	do {
		err = _nfs42_proc_fallocate(msg, filep, offset, len);
		if (err == -ENOTSUPP)
			return -EOPNOTSUPP;
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	return err;
}

int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
		return -EOPNOTSUPP;

	mutex_lock(&inode->i_mutex);

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;

	mutex_unlock(&inode->i_mutex);
	return err;
}

int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
		return -EOPNOTSUPP;

	nfs_wb_all(inode);
	mutex_lock(&inode->i_mutex);

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == 0)
		truncate_pagecache_range(inode, offset, (offset + len) -1);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;

	mutex_unlock(&inode->i_mutex);
	return err;
}

static loff_t _nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{
	struct inode *inode = file_inode(filep);
	struct nfs42_seek_args args = {
		.sa_fh		= NFS_FH(inode),
		.sa_offset	= offset,
		.sa_what	= (whence == SEEK_HOLE) ?
					NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
	};
	struct nfs42_seek_res res;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
	struct nfs_server *server = NFS_SERVER(inode);
	int status;

	if (!nfs_server_capable(inode, NFS_CAP_SEEK))
		return -ENOTSUPP;

	status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ);
	if (status)
		return status;

	nfs_wb_all(inode);
	status = nfs4_call_sync(server->client, server, &msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == -ENOTSUPP)
		server->caps &= ~NFS_CAP_SEEK;
	if (status)
		return status;

	return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
}

loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{
	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	struct nfs4_exception exception = { };
	loff_t err;

	do {
		err = _nfs42_proc_llseek(filep, offset, whence);
		if (err >= 0)
			break;
		if (err == -ENOTSUPP)
			return -EOPNOTSUPP;
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	return err;
}


static void
nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct nfs_server *server = NFS_SERVER(data->args.inode);

	nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
			     &data->res.seq_res, task);
}

static void
nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;

	if (!nfs4_sequence_done(task, &data->res.seq_res))
		return;

	switch (task->tk_status) {
	case 0:
		break;
	case -ENOTSUPP:
	case -EOPNOTSUPP:
		NFS_SERVER(data->inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
	default:
		dprintk("%s server returns %d\n", __func__, task->tk_status);
	}
}

static void
nfs42_layoutstat_release(void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct nfs_server *nfss = NFS_SERVER(data->args.inode);

	if (nfss->pnfs_curr_ld->cleanup_layoutstats)
		nfss->pnfs_curr_ld->cleanup_layoutstats(data);

	pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
	smp_mb__before_atomic();
	clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
	smp_mb__after_atomic();
	nfs_iput_and_deactive(data->inode);
	kfree(data->args.devinfo);
	kfree(data);
}

static const struct rpc_call_ops nfs42_layoutstat_ops = {
	.rpc_call_prepare = nfs42_layoutstat_prepare,
	.rpc_call_done = nfs42_layoutstat_done,
	.rpc_release = nfs42_layoutstat_release,
};

int nfs42_proc_layoutstats_generic(struct nfs_server *server,
				   struct nfs42_layoutstat_data *data)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
		.rpc_argp = &data->args,
		.rpc_resp = &data->res,
	};
	struct rpc_task_setup task_setup = {
		.rpc_client = server->client,
		.rpc_message = &msg,
		.callback_ops = &nfs42_layoutstat_ops,
		.callback_data = data,
		.flags = RPC_TASK_ASYNC,
	};
	struct rpc_task *task;

	data->inode = nfs_igrab_and_active(data->args.inode);
	if (!data->inode) {
		nfs42_layoutstat_release(data);
		return -EAGAIN;
	}
	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
	task = rpc_run_task(&task_setup);
	if (IS_ERR(task))
		return PTR_ERR(task);
	return 0;
}

static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
			     struct file *dst_f, loff_t src_offset,
			     loff_t dst_offset, loff_t count)
{
	struct inode *src_inode = file_inode(src_f);
	struct inode *dst_inode = file_inode(dst_f);
	struct nfs_server *server = NFS_SERVER(dst_inode);
	struct nfs42_clone_args args = {
		.src_fh = NFS_FH(src_inode),
		.dst_fh = NFS_FH(dst_inode),
		.src_offset = src_offset,
		.dst_offset = dst_offset,
		.count = count,
		.dst_bitmask = server->cache_consistency_bitmask,
	};
	struct nfs42_clone_res res = {
		.server	= server,
	};
	int status;

	msg->rpc_argp = &args;
	msg->rpc_resp = &res;

	status = nfs42_set_rw_stateid(&args.src_stateid, src_f, FMODE_READ);
	if (status)
		return status;

	status = nfs42_set_rw_stateid(&args.dst_stateid, dst_f, FMODE_WRITE);
	if (status)
		return status;

	res.dst_fattr = nfs_alloc_fattr();
	if (!res.dst_fattr)
		return -ENOMEM;

	status = nfs4_call_sync(server->client, server, msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == 0)
		status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);

	kfree(res.dst_fattr);
	return status;
}

int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
		     loff_t src_offset, loff_t dst_offset, loff_t count)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
	};
	struct inode *inode = file_inode(src_f);
	struct nfs_server *server = NFS_SERVER(file_inode(src_f));
	struct nfs4_exception exception = { };
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_CLONE))
		return -EOPNOTSUPP;

	do {
		err = _nfs42_proc_clone(&msg, src_f, dst_f, src_offset,
					dst_offset, count);
		if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
			NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
			return -EOPNOTSUPP;
		}
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	return err;

}
예제 #11
0
파일: nfs42proc.c 프로젝트: acton393/linux
static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
		struct nfs_lock_context *lock, loff_t offset, loff_t len)
{
	struct inode *inode = file_inode(filep);
	struct nfs_server *server = NFS_SERVER(inode);
	struct nfs42_falloc_args args = {
		.falloc_fh	= NFS_FH(inode),
		.falloc_offset	= offset,
		.falloc_length	= len,
		.falloc_bitmask	= server->cache_consistency_bitmask,
	};
	struct nfs42_falloc_res res = {
		.falloc_server	= server,
	};
	int status;

	msg->rpc_argp = &args;
	msg->rpc_resp = &res;

	status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
			lock, FMODE_WRITE);
	if (status)
		return status;

	res.falloc_fattr = nfs_alloc_fattr();
	if (!res.falloc_fattr)
		return -ENOMEM;

	status = nfs4_call_sync(server->client, server, msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == 0)
		status = nfs_post_op_update_inode(inode, res.falloc_fattr);

	kfree(res.falloc_fattr);
	return status;
}

static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
				loff_t offset, loff_t len)
{
	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	struct nfs4_exception exception = { };
	struct nfs_lock_context *lock;
	int err;

	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	if (IS_ERR(lock))
		return PTR_ERR(lock);

	exception.inode = file_inode(filep);
	exception.state = lock->open_context->state;

	do {
		err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
		if (err == -ENOTSUPP) {
			err = -EOPNOTSUPP;
			break;
		}
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	nfs_put_lock_context(lock);
	return err;
}

int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
		return -EOPNOTSUPP;

	inode_lock(inode);

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;

	inode_unlock(inode);
	return err;
}

int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
		return -EOPNOTSUPP;

	inode_lock(inode);
	err = nfs_sync_inode(inode);
	if (err)
		goto out_unlock;

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == 0)
		truncate_pagecache_range(inode, offset, (offset + len) -1);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
out_unlock:
	inode_unlock(inode);
	return err;
}

static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src,
				struct nfs_lock_context *src_lock,
				struct file *dst, loff_t pos_dst,
				struct nfs_lock_context *dst_lock,
				size_t count)
{
	struct nfs42_copy_args args = {
		.src_fh		= NFS_FH(file_inode(src)),
		.src_pos	= pos_src,
		.dst_fh		= NFS_FH(file_inode(dst)),
		.dst_pos	= pos_dst,
		.count		= count,
	};
	struct nfs42_copy_res res;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
	struct inode *dst_inode = file_inode(dst);
	struct nfs_server *server = NFS_SERVER(dst_inode);
	int status;

	status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
				     src_lock, FMODE_READ);
	if (status)
		return status;

	status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
			pos_src, pos_src + (loff_t)count - 1);
	if (status)
		return status;

	status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
				     dst_lock, FMODE_WRITE);
	if (status)
		return status;

	status = nfs_sync_inode(dst_inode);
	if (status)
		return status;

	status = nfs4_call_sync(server->client, server, &msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == -ENOTSUPP)
		server->caps &= ~NFS_CAP_COPY;
	if (status)
		return status;

	if (res.write_res.verifier.committed != NFS_FILE_SYNC) {
		status = nfs_commit_file(dst, &res.write_res.verifier.verifier);
		if (status)
			return status;
	}

	truncate_pagecache_range(dst_inode, pos_dst,
				 pos_dst + res.write_res.count);

	return res.write_res.count;
}

ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
			struct file *dst, loff_t pos_dst,
			size_t count)
{
	struct nfs_server *server = NFS_SERVER(file_inode(dst));
	struct nfs_lock_context *src_lock;
	struct nfs_lock_context *dst_lock;
	struct nfs4_exception src_exception = { };
	struct nfs4_exception dst_exception = { };
	ssize_t err, err2;

	if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
		return -EOPNOTSUPP;

	src_lock = nfs_get_lock_context(nfs_file_open_context(src));
	if (IS_ERR(src_lock))
		return PTR_ERR(src_lock);

	src_exception.inode = file_inode(src);
	src_exception.state = src_lock->open_context->state;

	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
	if (IS_ERR(dst_lock)) {
		err = PTR_ERR(dst_lock);
		goto out_put_src_lock;
	}

	dst_exception.inode = file_inode(dst);
	dst_exception.state = dst_lock->open_context->state;

	do {
		inode_lock(file_inode(dst));
		err = _nfs42_proc_copy(src, pos_src, src_lock,
				       dst, pos_dst, dst_lock, count);
		inode_unlock(file_inode(dst));

		if (err == -ENOTSUPP) {
			err = -EOPNOTSUPP;
			break;
		}

		err2 = nfs4_handle_exception(server, err, &src_exception);
		err  = nfs4_handle_exception(server, err, &dst_exception);
		if (!err)
			err = err2;
	} while (src_exception.retry || dst_exception.retry);

	nfs_put_lock_context(dst_lock);
out_put_src_lock:
	nfs_put_lock_context(src_lock);
	return err;
}

static loff_t _nfs42_proc_llseek(struct file *filep,
		struct nfs_lock_context *lock, loff_t offset, int whence)
{
	struct inode *inode = file_inode(filep);
	struct nfs42_seek_args args = {
		.sa_fh		= NFS_FH(inode),
		.sa_offset	= offset,
		.sa_what	= (whence == SEEK_HOLE) ?
					NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
	};
	struct nfs42_seek_res res;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
	struct nfs_server *server = NFS_SERVER(inode);
	int status;

	if (!nfs_server_capable(inode, NFS_CAP_SEEK))
		return -ENOTSUPP;

	status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
			lock, FMODE_READ);
	if (status)
		return status;

	status = nfs_filemap_write_and_wait_range(inode->i_mapping,
			offset, LLONG_MAX);
	if (status)
		return status;

	status = nfs4_call_sync(server->client, server, &msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == -ENOTSUPP)
		server->caps &= ~NFS_CAP_SEEK;
	if (status)
		return status;

	return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
}

loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{
	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	struct nfs4_exception exception = { };
	struct nfs_lock_context *lock;
	loff_t err;

	lock = nfs_get_lock_context(nfs_file_open_context(filep));
	if (IS_ERR(lock))
		return PTR_ERR(lock);

	exception.inode = file_inode(filep);
	exception.state = lock->open_context->state;

	do {
		err = _nfs42_proc_llseek(filep, lock, offset, whence);
		if (err >= 0)
			break;
		if (err == -ENOTSUPP) {
			err = -EOPNOTSUPP;
			break;
		}
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	nfs_put_lock_context(lock);
	return err;
}


static void
nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct inode *inode = data->inode;
	struct nfs_server *server = NFS_SERVER(inode);
	struct pnfs_layout_hdr *lo;

	spin_lock(&inode->i_lock);
	lo = NFS_I(inode)->layout;
	if (!pnfs_layout_is_valid(lo)) {
		spin_unlock(&inode->i_lock);
		rpc_exit(task, 0);
		return;
	}
	nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
	spin_unlock(&inode->i_lock);
	nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
			     &data->res.seq_res, task);

}

static void
nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct inode *inode = data->inode;
	struct pnfs_layout_hdr *lo;

	if (!nfs4_sequence_done(task, &data->res.seq_res))
		return;

	switch (task->tk_status) {
	case 0:
		break;
	case -NFS4ERR_EXPIRED:
	case -NFS4ERR_ADMIN_REVOKED:
	case -NFS4ERR_DELEG_REVOKED:
	case -NFS4ERR_STALE_STATEID:
	case -NFS4ERR_BAD_STATEID:
		spin_lock(&inode->i_lock);
		lo = NFS_I(inode)->layout;
		if (pnfs_layout_is_valid(lo) &&
		    nfs4_stateid_match(&data->args.stateid,
					     &lo->plh_stateid)) {
			LIST_HEAD(head);

			/*
			 * Mark the bad layout state as invalid, then retry
			 * with the current stateid.
			 */
			pnfs_mark_layout_stateid_invalid(lo, &head);
			spin_unlock(&inode->i_lock);
			pnfs_free_lseg_list(&head);
		} else
			spin_unlock(&inode->i_lock);
		break;
	case -NFS4ERR_OLD_STATEID:
		spin_lock(&inode->i_lock);
		lo = NFS_I(inode)->layout;
		if (pnfs_layout_is_valid(lo) &&
		    nfs4_stateid_match_other(&data->args.stateid,
					&lo->plh_stateid)) {
			/* Do we need to delay before resending? */
			if (!nfs4_stateid_is_newer(&lo->plh_stateid,
						&data->args.stateid))
				rpc_delay(task, HZ);
			rpc_restart_call_prepare(task);
		}
		spin_unlock(&inode->i_lock);
		break;
	case -ENOTSUPP:
	case -EOPNOTSUPP:
		NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
	}

	dprintk("%s server returns %d\n", __func__, task->tk_status);
}

static void
nfs42_layoutstat_release(void *calldata)
{
	struct nfs42_layoutstat_data *data = calldata;
	struct nfs_server *nfss = NFS_SERVER(data->args.inode);

	if (nfss->pnfs_curr_ld->cleanup_layoutstats)
		nfss->pnfs_curr_ld->cleanup_layoutstats(data);

	pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
	smp_mb__before_atomic();
	clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
	smp_mb__after_atomic();
	nfs_iput_and_deactive(data->inode);
	kfree(data->args.devinfo);
	kfree(data);
}

static const struct rpc_call_ops nfs42_layoutstat_ops = {
	.rpc_call_prepare = nfs42_layoutstat_prepare,
	.rpc_call_done = nfs42_layoutstat_done,
	.rpc_release = nfs42_layoutstat_release,
};

int nfs42_proc_layoutstats_generic(struct nfs_server *server,
				   struct nfs42_layoutstat_data *data)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
		.rpc_argp = &data->args,
		.rpc_resp = &data->res,
	};
	struct rpc_task_setup task_setup = {
		.rpc_client = server->client,
		.rpc_message = &msg,
		.callback_ops = &nfs42_layoutstat_ops,
		.callback_data = data,
		.flags = RPC_TASK_ASYNC,
	};
	struct rpc_task *task;

	data->inode = nfs_igrab_and_active(data->args.inode);
	if (!data->inode) {
		nfs42_layoutstat_release(data);
		return -EAGAIN;
	}
	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
	task = rpc_run_task(&task_setup);
	if (IS_ERR(task))
		return PTR_ERR(task);
	rpc_put_task(task);
	return 0;
}

static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
		struct file *dst_f, struct nfs_lock_context *src_lock,
		struct nfs_lock_context *dst_lock, loff_t src_offset,
		loff_t dst_offset, loff_t count)
{
	struct inode *src_inode = file_inode(src_f);
	struct inode *dst_inode = file_inode(dst_f);
	struct nfs_server *server = NFS_SERVER(dst_inode);
	struct nfs42_clone_args args = {
		.src_fh = NFS_FH(src_inode),
		.dst_fh = NFS_FH(dst_inode),
		.src_offset = src_offset,
		.dst_offset = dst_offset,
		.count = count,
		.dst_bitmask = server->cache_consistency_bitmask,
	};
	struct nfs42_clone_res res = {
		.server	= server,
	};
	int status;

	msg->rpc_argp = &args;
	msg->rpc_resp = &res;

	status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
			src_lock, FMODE_READ);
	if (status)
		return status;

	status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
			dst_lock, FMODE_WRITE);
	if (status)
		return status;

	res.dst_fattr = nfs_alloc_fattr();
	if (!res.dst_fattr)
		return -ENOMEM;

	status = nfs4_call_sync(server->client, server, msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == 0)
		status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);

	kfree(res.dst_fattr);
	return status;
}

int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
		     loff_t src_offset, loff_t dst_offset, loff_t count)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
	};
	struct inode *inode = file_inode(src_f);
	struct nfs_server *server = NFS_SERVER(file_inode(src_f));
	struct nfs_lock_context *src_lock;
	struct nfs_lock_context *dst_lock;
	struct nfs4_exception src_exception = { };
	struct nfs4_exception dst_exception = { };
	int err, err2;

	if (!nfs_server_capable(inode, NFS_CAP_CLONE))
		return -EOPNOTSUPP;

	src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
	if (IS_ERR(src_lock))
		return PTR_ERR(src_lock);

	src_exception.inode = file_inode(src_f);
	src_exception.state = src_lock->open_context->state;

	dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
	if (IS_ERR(dst_lock)) {
		err = PTR_ERR(dst_lock);
		goto out_put_src_lock;
	}

	dst_exception.inode = file_inode(dst_f);
	dst_exception.state = dst_lock->open_context->state;

	do {
		err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
					src_offset, dst_offset, count);
		if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
			NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
			err = -EOPNOTSUPP;
			break;
		}

		err2 = nfs4_handle_exception(server, err, &src_exception);
		err = nfs4_handle_exception(server, err, &dst_exception);
		if (!err)
			err = err2;
	} while (src_exception.retry || dst_exception.retry);

	nfs_put_lock_context(dst_lock);
out_put_src_lock:
	nfs_put_lock_context(src_lock);
	return err;
}
예제 #12
0
/*
 * get an NFS2/NFS3 root dentry from the root filehandle
 */
struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh,
			    const char *devname)
{
	struct nfs_server *server = NFS_SB(sb);
	struct nfs_fsinfo fsinfo;
	struct dentry *ret;
	struct inode *inode;
	void *name = kstrdup(devname, GFP_KERNEL);
	int error;

	if (!name)
		return ERR_PTR(-ENOMEM);

	/* get the actual root for this mount */
	fsinfo.fattr = nfs_alloc_fattr();
	if (fsinfo.fattr == NULL) {
		kfree(name);
		return ERR_PTR(-ENOMEM);
	}

	error = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo);
	if (error < 0) {
		dprintk("nfs_get_root: getattr error = %d\n", -error);
		ret = ERR_PTR(error);
		goto out;
	}

	inode = nfs_fhget(sb, mntfh, fsinfo.fattr);
	if (IS_ERR(inode)) {
		dprintk("nfs_get_root: get root inode failed\n");
		ret = ERR_CAST(inode);
		goto out;
	}

	error = nfs_superblock_set_dummy_root(sb, inode);
	if (error != 0) {
		ret = ERR_PTR(error);
		goto out;
	}

	/* root dentries normally start off anonymous and get spliced in later
	 * if the dentry tree reaches them; however if the dentry already
	 * exists, we'll pick it up at this point and use it as the root
	 */
	ret = d_obtain_alias(inode);
	if (IS_ERR(ret)) {
		dprintk("nfs_get_root: get root dentry failed\n");
		goto out;
	}

	security_d_instantiate(ret, inode);
	spin_lock(&ret->d_lock);
	if (IS_ROOT(ret) && !(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
		ret->d_fsdata = name;
		name = NULL;
	}
	spin_unlock(&ret->d_lock);
out:
	if (name)
		kfree(name);
	nfs_free_fattr(fsinfo.fattr);
	return ret;
}
예제 #13
0
/*
 * get an NFS4 root dentry from the root filehandle
 */
struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh)
{
	struct nfs_server *server = NFS_SB(sb);
	struct nfs_fattr *fattr = NULL;
	struct dentry *ret;
	struct inode *inode;
	int error;

	dprintk("--> nfs4_get_root()\n");

	/* get the info about the server and filesystem */
	error = nfs4_server_capabilities(server, mntfh);
	if (error < 0) {
		dprintk("nfs_get_root: getcaps error = %d\n",
			-error);
		return ERR_PTR(error);
	}

	fattr = nfs_alloc_fattr();
	if (fattr == NULL)
		return ERR_PTR(-ENOMEM);;

	/* get the actual root for this mount */
	error = server->nfs_client->rpc_ops->getattr(server, mntfh, fattr);
	if (error < 0) {
		dprintk("nfs_get_root: getattr error = %d\n", -error);
		ret = ERR_PTR(error);
		goto out;
	}

	inode = nfs_fhget(sb, mntfh, fattr);
	if (IS_ERR(inode)) {
		dprintk("nfs_get_root: get root inode failed\n");
		ret = ERR_CAST(inode);
		goto out;
	}

	error = nfs_superblock_set_dummy_root(sb, inode);
	if (error != 0) {
		ret = ERR_PTR(error);
		goto out;
	}

	/* root dentries normally start off anonymous and get spliced in later
	 * if the dentry tree reaches them; however if the dentry already
	 * exists, we'll pick it up at this point and use it as the root
	 */
	ret = d_obtain_alias(inode);
	if (IS_ERR(ret)) {
		dprintk("nfs_get_root: get root dentry failed\n");
		goto out;
	}

	security_d_instantiate(ret, inode);

	if (ret->d_op == NULL)
		ret->d_op = server->nfs_client->rpc_ops->dentry_ops;

out:
	nfs_free_fattr(fattr);
	dprintk("<-- nfs4_get_root()\n");
	return ret;
}
예제 #14
0
파일: nfs42proc.c 프로젝트: 19Dan01/linux
static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
				 loff_t offset, loff_t len)
{
	struct inode *inode = file_inode(filep);
	struct nfs_server *server = NFS_SERVER(inode);
	struct nfs42_falloc_args args = {
		.falloc_fh	= NFS_FH(inode),
		.falloc_offset	= offset,
		.falloc_length	= len,
		.falloc_bitmask	= server->cache_consistency_bitmask,
	};
	struct nfs42_falloc_res res = {
		.falloc_server	= server,
	};
	int status;

	msg->rpc_argp = &args;
	msg->rpc_resp = &res;

	status = nfs42_set_rw_stateid(&args.falloc_stateid, filep, FMODE_WRITE);
	if (status)
		return status;

	res.falloc_fattr = nfs_alloc_fattr();
	if (!res.falloc_fattr)
		return -ENOMEM;

	status = nfs4_call_sync(server->client, server, msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == 0)
		status = nfs_post_op_update_inode(inode, res.falloc_fattr);

	kfree(res.falloc_fattr);
	return status;
}

static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
				loff_t offset, loff_t len)
{
	struct nfs_server *server = NFS_SERVER(file_inode(filep));
	struct nfs4_exception exception = { };
	int err;

	do {
		err = _nfs42_proc_fallocate(msg, filep, offset, len);
		if (err == -ENOTSUPP)
			return -EOPNOTSUPP;
		err = nfs4_handle_exception(server, err, &exception);
	} while (exception.retry);

	return err;
}

int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
		return -EOPNOTSUPP;

	mutex_lock(&inode->i_mutex);

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;

	mutex_unlock(&inode->i_mutex);
	return err;
}

int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
{
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
	};
	struct inode *inode = file_inode(filep);
	int err;

	if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
		return -EOPNOTSUPP;

	nfs_wb_all(inode);
	mutex_lock(&inode->i_mutex);

	err = nfs42_proc_fallocate(&msg, filep, offset, len);
	if (err == 0)
		truncate_pagecache_range(inode, offset, (offset + len) -1);
	if (err == -EOPNOTSUPP)
		NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;

	mutex_unlock(&inode->i_mutex);
	return err;
}

loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{
	struct inode *inode = file_inode(filep);
	struct nfs42_seek_args args = {
		.sa_fh		= NFS_FH(inode),
		.sa_offset	= offset,
		.sa_what	= (whence == SEEK_HOLE) ?
					NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
	};
	struct nfs42_seek_res res;
	struct rpc_message msg = {
		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
		.rpc_argp = &args,
		.rpc_resp = &res,
	};
	struct nfs_server *server = NFS_SERVER(inode);
	int status;

	if (!nfs_server_capable(inode, NFS_CAP_SEEK))
		return -ENOTSUPP;

	status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ);
	if (status)
		return status;

	nfs_wb_all(inode);
	status = nfs4_call_sync(server->client, server, &msg,
				&args.seq_args, &res.seq_res, 0);
	if (status == -ENOTSUPP)
		server->caps &= ~NFS_CAP_SEEK;
	if (status)
		return status;

	return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
}
예제 #15
0
static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
{
	struct vfsmount *mnt;
	struct nfs_server *server = NFS_SERVER(dentry->d_inode);
	struct dentry *parent;
	struct nfs_fh *fh = NULL;
	struct nfs_fattr *fattr = NULL;
	int err;

	dprintk("--> nfs_follow_mountpoint()\n");

	err = -ESTALE;
	if (IS_ROOT(dentry))
		goto out_err;

	err = -ENOMEM;
	fh = nfs_alloc_fhandle();
	fattr = nfs_alloc_fattr();
	if (fh == NULL || fattr == NULL)
		goto out_err;

	dprintk("%s: enter\n", __func__);
	dput(nd->path.dentry);
	nd->path.dentry = dget(dentry);

	/* Look it up again */
	parent = dget_parent(nd->path.dentry);
	err = server->nfs_client->rpc_ops->lookup(parent->d_inode,
						  &nd->path.dentry->d_name,
						  fh, fattr);
	dput(parent);
	if (err != 0)
		goto out_err;

	if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
		mnt = nfs_do_refmount(nd->path.mnt, nd->path.dentry);
	else
		mnt = nfs_do_submount(nd->path.mnt, nd->path.dentry, fh,
				      fattr);
	err = PTR_ERR(mnt);
	if (IS_ERR(mnt))
		goto out_err;

	mntget(mnt);
	err = do_add_mount(mnt, &nd->path, nd->path.mnt->mnt_flags|MNT_SHRINKABLE,
			   &nfs_automount_list);
	if (err < 0) {
		mntput(mnt);
		if (err == -EBUSY)
			goto out_follow;
		goto out_err;
	}
	path_put(&nd->path);
	nd->path.mnt = mnt;
	nd->path.dentry = dget(mnt->mnt_root);
	schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout);
out:
	nfs_free_fattr(fattr);
	nfs_free_fhandle(fh);
	dprintk("%s: done, returned %d\n", __func__, err);

	dprintk("<-- nfs_follow_mountpoint() = %d\n", err);
	return ERR_PTR(err);
out_err:
	path_put(&nd->path);
	goto out;
out_follow:
	while (d_mountpoint(nd->path.dentry) &&
	       follow_down(&nd->path))
		;
	err = 0;
	goto out;
}