[mirror_ubuntu-zesty-kernel.git] / drivers / staging / lustre / lustre / llite / xattr.c

/*
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2011, 2012, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 */

#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/selinux.h>

#define DEBUG_SUBSYSTEM S_LLITE

#include "../include/obd_support.h"
#include "../include/lustre_lite.h"
#include "../include/lustre_dlm.h"
#include "../include/lustre_ver.h"
#include "../include/lustre_eacl.h"

#include "llite_internal.h"

#define XATTR_USER_T	    (1)
#define XATTR_TRUSTED_T	 (2)
#define XATTR_SECURITY_T	(3)
#define XATTR_ACL_ACCESS_T      (4)
#define XATTR_ACL_DEFAULT_T     (5)
#define XATTR_LUSTRE_T	  (6)
#define XATTR_OTHER_T	   (7)

static
int get_xattr_type(const char *name)
{
	if (!strcmp(name, XATTR_NAME_POSIX_ACL_ACCESS))
		return XATTR_ACL_ACCESS_T;

	if (!strcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT))
		return XATTR_ACL_DEFAULT_T;

	if (!strncmp(name, XATTR_USER_PREFIX,
		     sizeof(XATTR_USER_PREFIX) - 1))
		return XATTR_USER_T;

	if (!strncmp(name, XATTR_TRUSTED_PREFIX,
		     sizeof(XATTR_TRUSTED_PREFIX) - 1))
		return XATTR_TRUSTED_T;

	if (!strncmp(name, XATTR_SECURITY_PREFIX,
		     sizeof(XATTR_SECURITY_PREFIX) - 1))
		return XATTR_SECURITY_T;

	if (!strncmp(name, XATTR_LUSTRE_PREFIX,
		     sizeof(XATTR_LUSTRE_PREFIX) - 1))
		return XATTR_LUSTRE_T;

	return XATTR_OTHER_T;
}

static
int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
{
	if ((xattr_type == XATTR_ACL_ACCESS_T ||
	     xattr_type == XATTR_ACL_DEFAULT_T) &&
	   !(sbi->ll_flags & LL_SBI_ACL))
		return -EOPNOTSUPP;

	if (xattr_type == XATTR_USER_T && !(sbi->ll_flags & LL_SBI_USER_XATTR))
		return -EOPNOTSUPP;
	if (xattr_type == XATTR_TRUSTED_T && !capable(CFS_CAP_SYS_ADMIN))
		return -EPERM;
	if (xattr_type == XATTR_OTHER_T)
		return -EOPNOTSUPP;

	return 0;
}

static
int ll_setxattr_common(struct inode *inode, const char *name,
		       const void *value, size_t size,
		       int flags, __u64 valid)
{
	struct ll_sb_info *sbi = ll_i2sbi(inode);
	struct ptlrpc_request *req = NULL;
	int xattr_type, rc;
#ifdef CONFIG_FS_POSIX_ACL
	struct rmtacl_ctl_entry *rce = NULL;
	posix_acl_xattr_header *new_value = NULL;
	ext_acl_xattr_header *acl = NULL;
#endif
	const char *pv = value;

	xattr_type = get_xattr_type(name);
	rc = xattr_type_filter(sbi, xattr_type);
	if (rc)
		return rc;

	if ((xattr_type == XATTR_ACL_ACCESS_T ||
	     xattr_type == XATTR_ACL_DEFAULT_T) &&
	    !inode_owner_or_capable(inode))
		return -EPERM;

	/* b10667: ignore lustre special xattr for now */
	if ((xattr_type == XATTR_TRUSTED_T && strcmp(name, "trusted.lov") == 0) ||
	    (xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
		return 0;

	/* b15587: ignore security.capability xattr for now */
	if ((xattr_type == XATTR_SECURITY_T &&
	    strcmp(name, "security.capability") == 0))
		return 0;

	/* LU-549:  Disable security.selinux when selinux is disabled */
	if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
	    strcmp(name, "security.selinux") == 0)
		return -EOPNOTSUPP;

#ifdef CONFIG_FS_POSIX_ACL
	if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
	    (xattr_type == XATTR_ACL_ACCESS_T ||
	    xattr_type == XATTR_ACL_DEFAULT_T)) {
		rce = rct_search(&sbi->ll_rct, current_pid());
		if (rce == NULL ||
		    (rce->rce_ops != RMT_LSETFACL &&
		    rce->rce_ops != RMT_RSETFACL))
			return -EOPNOTSUPP;

		if (rce->rce_ops == RMT_LSETFACL) {
			struct eacl_entry *ee;

			ee = et_search_del(&sbi->ll_et, current_pid(),
					   ll_inode2fid(inode), xattr_type);
			LASSERT(ee != NULL);
			if (valid & OBD_MD_FLXATTR) {
				acl = lustre_acl_xattr_merge2ext(
						(posix_acl_xattr_header *)value,
						size, ee->ee_acl);
				if (IS_ERR(acl)) {
					ee_free(ee);
					return PTR_ERR(acl);
				}
				size =  CFS_ACL_XATTR_SIZE(\
						le32_to_cpu(acl->a_count), \
						ext_acl_xattr);
				pv = (const char *)acl;
			}
			ee_free(ee);
		} else if (rce->rce_ops == RMT_RSETFACL) {
			rc = lustre_posix_acl_xattr_filter(
						(posix_acl_xattr_header *)value,
						size, &new_value);
			if (unlikely(rc < 0))
				return rc;
			size = rc;

			pv = (const char *)new_value;
		} else
			return -EOPNOTSUPP;

		valid |= rce_ops2valid(rce->rce_ops);
	}
#endif
	rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode),
			 valid, name, pv, size, 0, flags,
			 ll_i2suppgid(inode), &req);
#ifdef CONFIG_FS_POSIX_ACL
	if (new_value != NULL)
		lustre_posix_acl_xattr_free(new_value, size);
	if (acl != NULL)
		lustre_ext_acl_xattr_free(acl);
#endif
	if (rc) {
		if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
			LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n");
			sbi->ll_flags &= ~LL_SBI_USER_XATTR;
		}
		return rc;
	}

	ptlrpc_req_finished(req);
	return 0;
}

int ll_setxattr(struct dentry *dentry, const char *name,
		const void *value, size_t size, int flags)
{
	struct inode *inode = d_inode(dentry);

	LASSERT(inode);
	LASSERT(name);

	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
	       inode->i_ino, inode->i_generation, inode, name);

	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);

	if ((strncmp(name, XATTR_TRUSTED_PREFIX,
		     sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
	     strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
	    (strncmp(name, XATTR_LUSTRE_PREFIX,
		     sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
	     strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
		struct lov_user_md *lump = (struct lov_user_md *)value;
		int rc = 0;

		if (size != 0 && size < sizeof(struct lov_user_md))
			return -EINVAL;

		/* Attributes that are saved via getxattr will always have
		 * the stripe_offset as 0.  Instead, the MDS should be
		 * allowed to pick the starting OST index.   b=17846 */
		if (lump != NULL && lump->lmm_stripe_offset == 0)
			lump->lmm_stripe_offset = -1;

		if (lump != NULL && S_ISREG(inode->i_mode)) {
			int flags = FMODE_WRITE;
			int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
				sizeof(*lump) : sizeof(struct lov_user_md_v3);

			rc = ll_lov_setstripe_ea_info(inode, dentry, flags, lump,
						      lum_size);
			/* b10667: rc always be 0 here for now */
			rc = 0;
		} else if (S_ISDIR(inode->i_mode)) {
			rc = ll_dir_setstripe(inode, lump, 0);
		}

		return rc;

	} else if (strcmp(name, XATTR_NAME_LMA) == 0 ||
		   strcmp(name, XATTR_NAME_LINK) == 0)
		return 0;

	return ll_setxattr_common(inode, name, value, size, flags,
				  OBD_MD_FLXATTR);
}

int ll_removexattr(struct dentry *dentry, const char *name)
{
	struct inode *inode = d_inode(dentry);

	LASSERT(inode);
	LASSERT(name);

	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
	       inode->i_ino, inode->i_generation, inode, name);

	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
	return ll_setxattr_common(inode, name, NULL, 0, 0,
				  OBD_MD_FLXATTRRM);
}

static
int ll_getxattr_common(struct inode *inode, const char *name,
		       void *buffer, size_t size, __u64 valid)
{
	struct ll_sb_info *sbi = ll_i2sbi(inode);
	struct ptlrpc_request *req = NULL;
	struct mdt_body *body;
	int xattr_type, rc;
	void *xdata;
	struct rmtacl_ctl_entry *rce = NULL;
	struct ll_inode_info *lli = ll_i2info(inode);

	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
	       inode->i_ino, inode->i_generation, inode);

	/* listxattr have slightly different behavior from of ext3:
	 * without 'user_xattr' ext3 will list all xattr names but
	 * filtered out "^user..*"; we list them all for simplicity.
	 */
	if (!name) {
		xattr_type = XATTR_OTHER_T;
		goto do_getxattr;
	}

	xattr_type = get_xattr_type(name);
	rc = xattr_type_filter(sbi, xattr_type);
	if (rc)
		return rc;

	/* b15587: ignore security.capability xattr for now */
	if ((xattr_type == XATTR_SECURITY_T &&
	    strcmp(name, "security.capability") == 0))
		return -ENODATA;

	/* LU-549:  Disable security.selinux when selinux is disabled */
	if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
	    strcmp(name, "security.selinux") == 0)
		return -EOPNOTSUPP;

#ifdef CONFIG_FS_POSIX_ACL
	if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
	    (xattr_type == XATTR_ACL_ACCESS_T ||
	    xattr_type == XATTR_ACL_DEFAULT_T)) {
		rce = rct_search(&sbi->ll_rct, current_pid());
		if (rce == NULL ||
		    (rce->rce_ops != RMT_LSETFACL &&
		    rce->rce_ops != RMT_LGETFACL &&
		    rce->rce_ops != RMT_RSETFACL &&
		    rce->rce_ops != RMT_RGETFACL))
			return -EOPNOTSUPP;
	}

	/* posix acl is under protection of LOOKUP lock. when calling to this,
	 * we just have path resolution to the target inode, so we have great
	 * chance that cached ACL is uptodate.
	 */
	if (xattr_type == XATTR_ACL_ACCESS_T &&
	    !(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {

		struct posix_acl *acl;

		spin_lock(&lli->lli_lock);
		acl = posix_acl_dup(lli->lli_posix_acl);
		spin_unlock(&lli->lli_lock);

		if (!acl)
			return -ENODATA;

		rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
		posix_acl_release(acl);
		return rc;
	}
	if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
		return -ENODATA;
#endif

do_getxattr:
	if (sbi->ll_xattr_cache_enabled && xattr_type != XATTR_ACL_ACCESS_T) {
		rc = ll_xattr_cache_get(inode, name, buffer, size, valid);
		if (rc == -EAGAIN)
			goto getxattr_nocache;
		if (rc < 0)
			goto out_xattr;

		/* Add "system.posix_acl_access" to the list */
		if (lli->lli_posix_acl != NULL && valid & OBD_MD_FLXATTRLS) {
			if (size == 0) {
				rc += sizeof(XATTR_NAME_ACL_ACCESS);
			} else if (size - rc >= sizeof(XATTR_NAME_ACL_ACCESS)) {
				memcpy(buffer + rc, XATTR_NAME_ACL_ACCESS,
				       sizeof(XATTR_NAME_ACL_ACCESS));
				rc += sizeof(XATTR_NAME_ACL_ACCESS);
			} else {
				rc = -ERANGE;
				goto out_xattr;
			}
		}
	} else {
getxattr_nocache:
		rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode),
				valid | (rce ? rce_ops2valid(rce->rce_ops) : 0),
				name, NULL, 0, size, 0, &req);

		if (rc < 0)
			goto out_xattr;

		body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
		LASSERT(body);

		/* only detect the xattr size */
		if (size == 0) {
			rc = body->eadatasize;
			goto out;
		}

		if (size < body->eadatasize) {
			CERROR("server bug: replied size %u > %u\n",
				body->eadatasize, (int)size);
			rc = -ERANGE;
			goto out;
		}

		if (body->eadatasize == 0) {
			rc = -ENODATA;
			goto out;
		}

		/* do not need swab xattr data */
		xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
							body->eadatasize);
		if (!xdata) {
			rc = -EFAULT;
			goto out;
		}

		memcpy(buffer, xdata, body->eadatasize);
		rc = body->eadatasize;
	}

#ifdef CONFIG_FS_POSIX_ACL
	if (rce && rce->rce_ops == RMT_LSETFACL) {
		ext_acl_xattr_header *acl;

		acl = lustre_posix_acl_xattr_2ext(
					(posix_acl_xattr_header *)buffer, rc);
		if (IS_ERR(acl)) {
			rc = PTR_ERR(acl);
			goto out;
		}

		rc = ee_add(&sbi->ll_et, current_pid(), ll_inode2fid(inode),
			    xattr_type, acl);
		if (unlikely(rc < 0)) {
			lustre_ext_acl_xattr_free(acl);
			goto out;
		}
	}
#endif

out_xattr:
	if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
		LCONSOLE_INFO(
			"%s: disabling user_xattr feature because it is not supported on the server: rc = %d\n",
			ll_get_fsname(inode->i_sb, NULL, 0), rc);
		sbi->ll_flags &= ~LL_SBI_USER_XATTR;
	}
out:
	ptlrpc_req_finished(req);
	return rc;
}

ssize_t ll_getxattr(struct dentry *dentry, const char *name,
		    void *buffer, size_t size)
{
	struct inode *inode = d_inode(dentry);

	LASSERT(inode);
	LASSERT(name);

	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
	       inode->i_ino, inode->i_generation, inode, name);

	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);

	if ((strncmp(name, XATTR_TRUSTED_PREFIX,
		     sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
	     strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) ||
	    (strncmp(name, XATTR_LUSTRE_PREFIX,
		     sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
	     strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
		struct lov_stripe_md *lsm;
		struct lov_user_md *lump;
		struct lov_mds_md *lmm = NULL;
		struct ptlrpc_request *request = NULL;
		int rc = 0, lmmsize = 0;

		if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
			return -ENODATA;

		if (size == 0 && S_ISDIR(inode->i_mode)) {
			/* XXX directory EA is fix for now, optimize to save
			 * RPC transfer */
			rc = sizeof(struct lov_user_md);
			goto out;
		}

		lsm = ccc_inode_lsm_get(inode);
		if (lsm == NULL) {
			if (S_ISDIR(inode->i_mode)) {
				rc = ll_dir_getstripe(inode, &lmm,
						      &lmmsize, &request);
			} else {
				rc = -ENODATA;
			}
		} else {
			/* LSM is present already after lookup/getattr call.
			 * we need to grab layout lock once it is implemented */
			rc = obd_packmd(ll_i2dtexp(inode), &lmm, lsm);
			lmmsize = rc;
		}
		ccc_inode_lsm_put(inode, lsm);

		if (rc < 0)
			goto out;

		if (size == 0) {
			/* used to call ll_get_max_mdsize() forward to get
			 * the maximum buffer size, while some apps (such as
			 * rsync 3.0.x) care much about the exact xattr value
			 * size */
			rc = lmmsize;
			goto out;
		}

		if (size < lmmsize) {
			CERROR("server bug: replied size %d > %d for %pd (%s)\n",
			       lmmsize, (int)size, dentry, name);
			rc = -ERANGE;
			goto out;
		}

		lump = buffer;
		memcpy(lump, lmm, lmmsize);
		/* do not return layout gen for getxattr otherwise it would
		 * confuse tar --xattr by recognizing layout gen as stripe
		 * offset when the file is restored. See LU-2809. */
		lump->lmm_layout_gen = 0;

		rc = lmmsize;
out:
		if (request)
			ptlrpc_req_finished(request);
		else if (lmm)
			obd_free_diskmd(ll_i2dtexp(inode), &lmm);
		return rc;
	}

	return ll_getxattr_common(inode, name, buffer, size, OBD_MD_FLXATTR);
}

ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
{
	struct inode *inode = d_inode(dentry);
	int rc = 0, rc2 = 0;
	struct lov_mds_md *lmm = NULL;
	struct ptlrpc_request *request = NULL;
	int lmmsize;

	LASSERT(inode);

	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
	       inode->i_ino, inode->i_generation, inode);

	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);

	rc = ll_getxattr_common(inode, NULL, buffer, size, OBD_MD_FLXATTRLS);
	if (rc < 0)
		goto out;

	if (buffer != NULL) {
		struct ll_sb_info *sbi = ll_i2sbi(inode);
		char *xattr_name = buffer;
		int xlen, rem = rc;

		while (rem > 0) {
			xlen = strnlen(xattr_name, rem - 1) + 1;
			rem -= xlen;
			if (xattr_type_filter(sbi,
					get_xattr_type(xattr_name)) == 0) {
				/* skip OK xattr type
				 * leave it in buffer
				 */
				xattr_name += xlen;
				continue;
			}
			/* move up remaining xattrs in buffer
			 * removing the xattr that is not OK
			 */
			memmove(xattr_name, xattr_name + xlen, rem);
			rc -= xlen;
		}
	}
	if (S_ISREG(inode->i_mode)) {
		if (!ll_i2info(inode)->lli_has_smd)
			rc2 = -1;
	} else if (S_ISDIR(inode->i_mode)) {
		rc2 = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
	}

	if (rc2 < 0) {
		rc2 = 0;
		goto out;
	} else if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)) {
		const int prefix_len = sizeof(XATTR_LUSTRE_PREFIX) - 1;
		const size_t name_len   = sizeof("lov") - 1;
		const size_t total_len  = prefix_len + name_len + 1;

		if (((rc + total_len) > size) && (buffer != NULL)) {
			ptlrpc_req_finished(request);
			return -ERANGE;
		}

		if (buffer != NULL) {
			buffer += rc;
			memcpy(buffer, XATTR_LUSTRE_PREFIX, prefix_len);
			memcpy(buffer + prefix_len, "lov", name_len);
			buffer[prefix_len + name_len] = '\0';
		}
		rc2 = total_len;
	}
out:
	ptlrpc_req_finished(request);
	rc = rc + rc2;

	return rc;
}
Commit	Line	Data
d7e09d03 PT	1	/*
	2	* GPL HEADER START
	3	*
	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 only,
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License version 2 for more details (a copy is included
	14	* in the LICENSE file that accompanied this code).
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* version 2 along with this program; If not, see
	18	* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
	19	*
	20	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	21	* CA 95054 USA or visit www.sun.com if you need additional information or
	22	* have any questions.
	23	*
	24	* GPL HEADER END
	25	*/
	26	/*
	27	* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
	28	* Use is subject to license terms.
	29	*
	30	* Copyright (c) 2011, 2012, Intel Corporation.
	31	*/
	32	/*
	33	* This file is part of Lustre, http://www.lustre.org/
	34	* Lustre is a trademark of Sun Microsystems, Inc.
	35	*/
	36
	37	#include <linux/fs.h>
	38	#include <linux/sched.h>
	39	#include <linux/mm.h>
	40	#include <linux/selinux.h>
	41
	42	#define DEBUG_SUBSYSTEM S_LLITE
	43
67a235f5 GKH	44	#include "../include/obd_support.h"
	45	#include "../include/lustre_lite.h"
	46	#include "../include/lustre_dlm.h"
	47	#include "../include/lustre_ver.h"
	48	#include "../include/lustre_eacl.h"
d7e09d03 PT	49
	50	#include "llite_internal.h"
	51
	52	#define XATTR_USER_T (1)
	53	#define XATTR_TRUSTED_T (2)
	54	#define XATTR_SECURITY_T (3)
	55	#define XATTR_ACL_ACCESS_T (4)
	56	#define XATTR_ACL_DEFAULT_T (5)
	57	#define XATTR_LUSTRE_T (6)
	58	#define XATTR_OTHER_T (7)
	59
	60	static
	61	int get_xattr_type(const char *name)
	62	{
97d79299	63	if (!strcmp(name, XATTR_NAME_POSIX_ACL_ACCESS))
d7e09d03 PT	64	return XATTR_ACL_ACCESS_T;
d7e09d03 PT	65
97d79299	66	if (!strcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT))
d7e09d03 PT	67	return XATTR_ACL_DEFAULT_T;
	68
	69	if (!strncmp(name, XATTR_USER_PREFIX,
	70	sizeof(XATTR_USER_PREFIX) - 1))
	71	return XATTR_USER_T;
	72
	73	if (!strncmp(name, XATTR_TRUSTED_PREFIX,
	74	sizeof(XATTR_TRUSTED_PREFIX) - 1))
	75	return XATTR_TRUSTED_T;
	76
	77	if (!strncmp(name, XATTR_SECURITY_PREFIX,
	78	sizeof(XATTR_SECURITY_PREFIX) - 1))
	79	return XATTR_SECURITY_T;
	80
	81	if (!strncmp(name, XATTR_LUSTRE_PREFIX,
	82	sizeof(XATTR_LUSTRE_PREFIX) - 1))
	83	return XATTR_LUSTRE_T;
	84
	85	return XATTR_OTHER_T;
	86	}
	87
	88	static
	89	int xattr_type_filter(struct ll_sb_info *sbi, int xattr_type)
	90	{
	91	if ((xattr_type == XATTR_ACL_ACCESS_T \|\|
	92	xattr_type == XATTR_ACL_DEFAULT_T) &&
	93	!(sbi->ll_flags & LL_SBI_ACL))
	94	return -EOPNOTSUPP;
	95
	96	if (xattr_type == XATTR_USER_T && !(sbi->ll_flags & LL_SBI_USER_XATTR))
	97	return -EOPNOTSUPP;
2eb90a75	98	if (xattr_type == XATTR_TRUSTED_T && !capable(CFS_CAP_SYS_ADMIN))
d7e09d03 PT	99	return -EPERM;
	100	if (xattr_type == XATTR_OTHER_T)
	101	return -EOPNOTSUPP;
	102
	103	return 0;
	104	}
	105
	106	static
	107	int ll_setxattr_common(struct inode inode, const char name,
	108	const void *value, size_t size,
	109	int flags, __u64 valid)
	110	{
	111	struct ll_sb_info *sbi = ll_i2sbi(inode);
7fc1f831	112	struct ptlrpc_request *req = NULL;
d7e09d03	113	int xattr_type, rc;
9147dc8d	114	#ifdef CONFIG_FS_POSIX_ACL
1d316792	115	struct rmtacl_ctl_entry *rce = NULL;
d7e09d03	116	posix_acl_xattr_header *new_value = NULL;
d7e09d03	117	ext_acl_xattr_header *acl = NULL;
9147dc8d	118	#endif
d7e09d03	119	const char *pv = value;
d7e09d03 PT	120
	121	xattr_type = get_xattr_type(name);
	122	rc = xattr_type_filter(sbi, xattr_type);
	123	if (rc)
0a3bdb00	124	return rc;
d7e09d03	125
0667dfff LX	126	if ((xattr_type == XATTR_ACL_ACCESS_T \|\|
	127	xattr_type == XATTR_ACL_DEFAULT_T) &&
	128	!inode_owner_or_capable(inode))
	129	return -EPERM;
	130
d7e09d03 PT	131	/* b10667: ignore lustre special xattr for now */
	132	if ((xattr_type == XATTR_TRUSTED_T && strcmp(name, "trusted.lov") == 0) \|\|
	133	(xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
0a3bdb00	134	return 0;
d7e09d03 PT	135
	136	/* b15587: ignore security.capability xattr for now */
	137	if ((xattr_type == XATTR_SECURITY_T &&
	138	strcmp(name, "security.capability") == 0))
0a3bdb00	139	return 0;
d7e09d03 PT	140
	141	/* LU-549: Disable security.selinux when selinux is disabled */
	142	if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
	143	strcmp(name, "security.selinux") == 0)
0a3bdb00	144	return -EOPNOTSUPP;
d7e09d03 PT	145
	146	#ifdef CONFIG_FS_POSIX_ACL
	147	if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
	148	(xattr_type == XATTR_ACL_ACCESS_T \|\|
	149	xattr_type == XATTR_ACL_DEFAULT_T)) {
	150	rce = rct_search(&sbi->ll_rct, current_pid());
	151	if (rce == NULL \|\|
	152	(rce->rce_ops != RMT_LSETFACL &&
	153	rce->rce_ops != RMT_RSETFACL))
0a3bdb00	154	return -EOPNOTSUPP;
d7e09d03 PT	155
	156	if (rce->rce_ops == RMT_LSETFACL) {
	157	struct eacl_entry *ee;
	158
	159	ee = et_search_del(&sbi->ll_et, current_pid(),
	160	ll_inode2fid(inode), xattr_type);
	161	LASSERT(ee != NULL);
	162	if (valid & OBD_MD_FLXATTR) {
	163	acl = lustre_acl_xattr_merge2ext(
	164	(posix_acl_xattr_header *)value,
	165	size, ee->ee_acl);
	166	if (IS_ERR(acl)) {
	167	ee_free(ee);
0a3bdb00	168	return PTR_ERR(acl);
d7e09d03 PT	169	}
	170	size = CFS_ACL_XATTR_SIZE(\
	171	le32_to_cpu(acl->a_count), \
	172	ext_acl_xattr);
	173	pv = (const char *)acl;
	174	}
	175	ee_free(ee);
	176	} else if (rce->rce_ops == RMT_RSETFACL) {
92bb833e	177	rc = lustre_posix_acl_xattr_filter(
d7e09d03 PT	178	(posix_acl_xattr_header *)value,
d7e09d03 PT	179	size, &new_value);
92bb833e AH	180	if (unlikely(rc < 0))
	181	return rc;
	182	size = rc;
d7e09d03 PT	183
	184	pv = (const char *)new_value;
	185	} else
0a3bdb00	186	return -EOPNOTSUPP;
d7e09d03 PT	187
	188	valid \|= rce_ops2valid(rce->rce_ops);
	189	}
	190	#endif
ef2e0f55	191	rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode),
a612b007 OD	192	valid, name, pv, size, 0, flags,
a612b007 OD	193	ll_i2suppgid(inode), &req);
d7e09d03 PT	194	#ifdef CONFIG_FS_POSIX_ACL
	195	if (new_value != NULL)
	196	lustre_posix_acl_xattr_free(new_value, size);
	197	if (acl != NULL)
	198	lustre_ext_acl_xattr_free(acl);
	199	#endif
	200	if (rc) {
	201	if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
2d00bd17	202	LCONSOLE_INFO("Disabling user_xattr feature because it is not supported on the server\n");
d7e09d03 PT	203	sbi->ll_flags &= ~LL_SBI_USER_XATTR;
d7e09d03 PT	204	}
0a3bdb00	205	return rc;
d7e09d03 PT	206	}
	207
	208	ptlrpc_req_finished(req);
0a3bdb00	209	return 0;
d7e09d03 PT	210	}
	211
	212	int ll_setxattr(struct dentry dentry, const char name,
	213	const void *value, size_t size, int flags)
	214	{
2b0143b5	215	struct inode *inode = d_inode(dentry);
d7e09d03 PT	216
	217	LASSERT(inode);
	218	LASSERT(name);
	219
	220	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
	221	inode->i_ino, inode->i_generation, inode, name);
	222
	223	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
	224
	225	if ((strncmp(name, XATTR_TRUSTED_PREFIX,
	226	sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
	227	strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) \|\|
	228	(strncmp(name, XATTR_LUSTRE_PREFIX,
	229	sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
	230	strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
	231	struct lov_user_md lump = (struct lov_user_md )value;
	232	int rc = 0;
	233
87ebccf9 DC	234	if (size != 0 && size < sizeof(struct lov_user_md))
	235	return -EINVAL;
	236
d7e09d03 PT	237	/* Attributes that are saved via getxattr will always have
	238	* the stripe_offset as 0. Instead, the MDS should be
	239	* allowed to pick the starting OST index. b=17846 */
	240	if (lump != NULL && lump->lmm_stripe_offset == 0)
	241	lump->lmm_stripe_offset = -1;
	242
	243	if (lump != NULL && S_ISREG(inode->i_mode)) {
d7e09d03 PT	244	int flags = FMODE_WRITE;
	245	int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
	246	sizeof(*lump) : sizeof(struct lov_user_md_v3);
	247
c139f3ce	248	rc = ll_lov_setstripe_ea_info(inode, dentry, flags, lump,
d7e09d03 PT	249	lum_size);
	250	/* b10667: rc always be 0 here for now */
	251	rc = 0;
	252	} else if (S_ISDIR(inode->i_mode)) {
	253	rc = ll_dir_setstripe(inode, lump, 0);
	254	}
	255
	256	return rc;
	257
	258	} else if (strcmp(name, XATTR_NAME_LMA) == 0 \|\|
	259	strcmp(name, XATTR_NAME_LINK) == 0)
	260	return 0;
	261
	262	return ll_setxattr_common(inode, name, value, size, flags,
	263	OBD_MD_FLXATTR);
	264	}
	265
	266	int ll_removexattr(struct dentry dentry, const char name)
	267	{
2b0143b5	268	struct inode *inode = d_inode(dentry);
d7e09d03 PT	269
	270	LASSERT(inode);
	271	LASSERT(name);
	272
	273	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
	274	inode->i_ino, inode->i_generation, inode, name);
	275
	276	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
	277	return ll_setxattr_common(inode, name, NULL, 0, 0,
	278	OBD_MD_FLXATTRRM);
	279	}
	280
	281	static
	282	int ll_getxattr_common(struct inode inode, const char name,
	283	void *buffer, size_t size, __u64 valid)
	284	{
	285	struct ll_sb_info *sbi = ll_i2sbi(inode);
	286	struct ptlrpc_request *req = NULL;
	287	struct mdt_body *body;
	288	int xattr_type, rc;
	289	void *xdata;
d7e09d03	290	struct rmtacl_ctl_entry *rce = NULL;
e93a3082	291	struct ll_inode_info *lli = ll_i2info(inode);
d7e09d03 PT	292
	293	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
	294	inode->i_ino, inode->i_generation, inode);
	295
	296	/* listxattr have slightly different behavior from of ext3:
	297	* without 'user_xattr' ext3 will list all xattr names but
	298	* filtered out "^user..*"; we list them all for simplicity.
	299	*/
	300	if (!name) {
	301	xattr_type = XATTR_OTHER_T;
	302	goto do_getxattr;
	303	}
	304
	305	xattr_type = get_xattr_type(name);
	306	rc = xattr_type_filter(sbi, xattr_type);
	307	if (rc)
0a3bdb00	308	return rc;
d7e09d03 PT	309
	310	/* b15587: ignore security.capability xattr for now */
	311	if ((xattr_type == XATTR_SECURITY_T &&
	312	strcmp(name, "security.capability") == 0))
0a3bdb00	313	return -ENODATA;
d7e09d03 PT	314
	315	/* LU-549: Disable security.selinux when selinux is disabled */
	316	if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
	317	strcmp(name, "security.selinux") == 0)
0a3bdb00	318	return -EOPNOTSUPP;
d7e09d03 PT	319
	320	#ifdef CONFIG_FS_POSIX_ACL
	321	if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
	322	(xattr_type == XATTR_ACL_ACCESS_T \|\|
	323	xattr_type == XATTR_ACL_DEFAULT_T)) {
	324	rce = rct_search(&sbi->ll_rct, current_pid());
	325	if (rce == NULL \|\|
	326	(rce->rce_ops != RMT_LSETFACL &&
	327	rce->rce_ops != RMT_LGETFACL &&
	328	rce->rce_ops != RMT_RSETFACL &&
	329	rce->rce_ops != RMT_RGETFACL))
0a3bdb00	330	return -EOPNOTSUPP;
d7e09d03 PT	331	}
	332
	333	/* posix acl is under protection of LOOKUP lock. when calling to this,
	334	* we just have path resolution to the target inode, so we have great
	335	* chance that cached ACL is uptodate.
	336	*/
	337	if (xattr_type == XATTR_ACL_ACCESS_T &&
	338	!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
e93a3082	339
d7e09d03 PT	340	struct posix_acl *acl;
	341
	342	spin_lock(&lli->lli_lock);
	343	acl = posix_acl_dup(lli->lli_posix_acl);
	344	spin_unlock(&lli->lli_lock);
	345
	346	if (!acl)
0a3bdb00	347	return -ENODATA;
d7e09d03 PT	348
	349	rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
	350	posix_acl_release(acl);
0a3bdb00	351	return rc;
d7e09d03 PT	352	}
d7e09d03 PT	353	if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
0a3bdb00	354	return -ENODATA;
d7e09d03 PT	355	#endif
	356
	357	do_getxattr:
e93a3082	358	if (sbi->ll_xattr_cache_enabled && xattr_type != XATTR_ACL_ACCESS_T) {
7fc1f831	359	rc = ll_xattr_cache_get(inode, name, buffer, size, valid);
e93a3082 AP	360	if (rc == -EAGAIN)
e93a3082 AP	361	goto getxattr_nocache;
7fc1f831	362	if (rc < 0)
34e1f2bb	363	goto out_xattr;
e93a3082 AP	364
	365	/* Add "system.posix_acl_access" to the list */
	366	if (lli->lli_posix_acl != NULL && valid & OBD_MD_FLXATTRLS) {
	367	if (size == 0) {
	368	rc += sizeof(XATTR_NAME_ACL_ACCESS);
	369	} else if (size - rc >= sizeof(XATTR_NAME_ACL_ACCESS)) {
	370	memcpy(buffer + rc, XATTR_NAME_ACL_ACCESS,
	371	sizeof(XATTR_NAME_ACL_ACCESS));
	372	rc += sizeof(XATTR_NAME_ACL_ACCESS);
	373	} else {
34e1f2bb JL	374	rc = -ERANGE;
34e1f2bb JL	375	goto out_xattr;
e93a3082 AP	376	}
e93a3082 AP	377	}
7fc1f831	378	} else {
e93a3082	379	getxattr_nocache:
ef2e0f55	380	rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode),
7fc1f831 AP	381	valid \| (rce ? rce_ops2valid(rce->rce_ops) : 0),
7fc1f831 AP	382	name, NULL, 0, size, 0, &req);
7fc1f831 AP	383
7fc1f831 AP	384	if (rc < 0)
34e1f2bb	385	goto out_xattr;
7fc1f831 AP	386
	387	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
	388	LASSERT(body);
	389
	390	/* only detect the xattr size */
34e1f2bb JL	391	if (size == 0) {
	392	rc = body->eadatasize;
	393	goto out;
	394	}
7fc1f831 AP	395
	396	if (size < body->eadatasize) {
	397	CERROR("server bug: replied size %u > %u\n",
	398	body->eadatasize, (int)size);
34e1f2bb JL	399	rc = -ERANGE;
34e1f2bb JL	400	goto out;
d7e09d03	401	}
d7e09d03	402
34e1f2bb JL	403	if (body->eadatasize == 0) {
	404	rc = -ENODATA;
	405	goto out;
	406	}
d7e09d03	407
7fc1f831 AP	408	/* do not need swab xattr data */
	409	xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
	410	body->eadatasize);
34e1f2bb JL	411	if (!xdata) {
	412	rc = -EFAULT;
	413	goto out;
	414	}
d7e09d03	415
7fc1f831 AP	416	memcpy(buffer, xdata, body->eadatasize);
7fc1f831 AP	417	rc = body->eadatasize;
d7e09d03 PT	418	}
d7e09d03 PT	419
d7e09d03	420	#ifdef CONFIG_FS_POSIX_ACL
7fc1f831	421	if (rce && rce->rce_ops == RMT_LSETFACL) {
d7e09d03 PT	422	ext_acl_xattr_header *acl;
d7e09d03 PT	423
7fc1f831 AP	424	acl = lustre_posix_acl_xattr_2ext(
7fc1f831 AP	425	(posix_acl_xattr_header *)buffer, rc);
34e1f2bb JL	426	if (IS_ERR(acl)) {
	427	rc = PTR_ERR(acl);
	428	goto out;
	429	}
d7e09d03 PT	430
	431	rc = ee_add(&sbi->ll_et, current_pid(), ll_inode2fid(inode),
	432	xattr_type, acl);
	433	if (unlikely(rc < 0)) {
	434	lustre_ext_acl_xattr_free(acl);
34e1f2bb	435	goto out;
d7e09d03 PT	436	}
	437	}
	438	#endif
	439
7fc1f831 AP	440	out_xattr:
	441	if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
	442	LCONSOLE_INFO(
	443	"%s: disabling user_xattr feature because it is not supported on the server: rc = %d\n",
	444	ll_get_fsname(inode->i_sb, NULL, 0), rc);
	445	sbi->ll_flags &= ~LL_SBI_USER_XATTR;
d7e09d03	446	}
d7e09d03 PT	447	out:
	448	ptlrpc_req_finished(req);
	449	return rc;
	450	}
	451
	452	ssize_t ll_getxattr(struct dentry dentry, const char name,
	453	void *buffer, size_t size)
	454	{
2b0143b5	455	struct inode *inode = d_inode(dentry);
d7e09d03 PT	456
	457	LASSERT(inode);
	458	LASSERT(name);
	459
	460	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
	461	inode->i_ino, inode->i_generation, inode, name);
	462
	463	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
	464
	465	if ((strncmp(name, XATTR_TRUSTED_PREFIX,
	466	sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
	467	strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) \|\|
	468	(strncmp(name, XATTR_LUSTRE_PREFIX,
	469	sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
	470	strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
	471	struct lov_stripe_md *lsm;
	472	struct lov_user_md *lump;
	473	struct lov_mds_md *lmm = NULL;
	474	struct ptlrpc_request *request = NULL;
	475	int rc = 0, lmmsize = 0;
	476
	477	if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
	478	return -ENODATA;
	479
	480	if (size == 0 && S_ISDIR(inode->i_mode)) {
	481	/* XXX directory EA is fix for now, optimize to save
	482	* RPC transfer */
34e1f2bb JL	483	rc = sizeof(struct lov_user_md);
34e1f2bb JL	484	goto out;
d7e09d03 PT	485	}
	486
	487	lsm = ccc_inode_lsm_get(inode);
	488	if (lsm == NULL) {
	489	if (S_ISDIR(inode->i_mode)) {
	490	rc = ll_dir_getstripe(inode, &lmm,
	491	&lmmsize, &request);
	492	} else {
	493	rc = -ENODATA;
	494	}
	495	} else {
	496	/* LSM is present already after lookup/getattr call.
	497	* we need to grab layout lock once it is implemented */
	498	rc = obd_packmd(ll_i2dtexp(inode), &lmm, lsm);
	499	lmmsize = rc;
	500	}
	501	ccc_inode_lsm_put(inode, lsm);
	502
	503	if (rc < 0)
34e1f2bb	504	goto out;
d7e09d03 PT	505
	506	if (size == 0) {
	507	/* used to call ll_get_max_mdsize() forward to get
	508	* the maximum buffer size, while some apps (such as
	509	* rsync 3.0.x) care much about the exact xattr value
	510	* size */
	511	rc = lmmsize;
34e1f2bb	512	goto out;
d7e09d03 PT	513	}
	514
	515	if (size < lmmsize) {
09561a53 AV	516	CERROR("server bug: replied size %d > %d for %pd (%s)\n",
09561a53 AV	517	lmmsize, (int)size, dentry, name);
34e1f2bb JL	518	rc = -ERANGE;
34e1f2bb JL	519	goto out;
d7e09d03 PT	520	}
d7e09d03 PT	521
634ffdd9	522	lump = buffer;
d7e09d03 PT	523	memcpy(lump, lmm, lmmsize);
	524	/* do not return layout gen for getxattr otherwise it would
	525	* confuse tar --xattr by recognizing layout gen as stripe
	526	* offset when the file is restored. See LU-2809. */
	527	lump->lmm_layout_gen = 0;
	528
	529	rc = lmmsize;
	530	out:
	531	if (request)
	532	ptlrpc_req_finished(request);
	533	else if (lmm)
	534	obd_free_diskmd(ll_i2dtexp(inode), &lmm);
fbe7c6c7	535	return rc;
d7e09d03 PT	536	}
	537
	538	return ll_getxattr_common(inode, name, buffer, size, OBD_MD_FLXATTR);
	539	}
	540
	541	ssize_t ll_listxattr(struct dentry dentry, char buffer, size_t size)
	542	{
2b0143b5	543	struct inode *inode = d_inode(dentry);
d7e09d03 PT	544	int rc = 0, rc2 = 0;
	545	struct lov_mds_md *lmm = NULL;
	546	struct ptlrpc_request *request = NULL;
	547	int lmmsize;
	548
	549	LASSERT(inode);
	550
	551	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
	552	inode->i_ino, inode->i_generation, inode);
	553
	554	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
	555
	556	rc = ll_getxattr_common(inode, NULL, buffer, size, OBD_MD_FLXATTRLS);
	557	if (rc < 0)
34e1f2bb	558	goto out;
d7e09d03 PT	559
	560	if (buffer != NULL) {
	561	struct ll_sb_info *sbi = ll_i2sbi(inode);
	562	char *xattr_name = buffer;
	563	int xlen, rem = rc;
	564
	565	while (rem > 0) {
	566	xlen = strnlen(xattr_name, rem - 1) + 1;
	567	rem -= xlen;
	568	if (xattr_type_filter(sbi,
	569	get_xattr_type(xattr_name)) == 0) {
	570	/* skip OK xattr type
	571	* leave it in buffer
	572	*/
	573	xattr_name += xlen;
	574	continue;
	575	}
	576	/* move up remaining xattrs in buffer
	577	* removing the xattr that is not OK
	578	*/
	579	memmove(xattr_name, xattr_name + xlen, rem);
	580	rc -= xlen;
	581	}
	582	}
	583	if (S_ISREG(inode->i_mode)) {
	584	if (!ll_i2info(inode)->lli_has_smd)
	585	rc2 = -1;
	586	} else if (S_ISDIR(inode->i_mode)) {
	587	rc2 = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
	588	}
	589
	590	if (rc2 < 0) {
34e1f2bb JL	591	rc2 = 0;
34e1f2bb JL	592	goto out;
d7e09d03 PT	593	} else if (S_ISREG(inode->i_mode) \|\| S_ISDIR(inode->i_mode)) {
	594	const int prefix_len = sizeof(XATTR_LUSTRE_PREFIX) - 1;
	595	const size_t name_len = sizeof("lov") - 1;
	596	const size_t total_len = prefix_len + name_len + 1;
	597
cb6a2db6 KM	598	if (((rc + total_len) > size) && (buffer != NULL)) {
	599	ptlrpc_req_finished(request);
	600	return -ERANGE;
	601	}
	602
	603	if (buffer != NULL) {
d7e09d03 PT	604	buffer += rc;
	605	memcpy(buffer, XATTR_LUSTRE_PREFIX, prefix_len);
	606	memcpy(buffer + prefix_len, "lov", name_len);
	607	buffer[prefix_len + name_len] = '\0';
	608	}
	609	rc2 = total_len;
	610	}
	611	out:
	612	ptlrpc_req_finished(request);
	613	rc = rc + rc2;
	614
	615	return rc;
	616	}