[deliverable/linux.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, POSIX_ACL_XATTR_ACCESS))
		return XATTR_ACL_ACCESS_T;

	if (!strcmp(name, POSIX_ACL_XATTR_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;
	struct obd_capa *oc;
#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) {
			size = lustre_posix_acl_xattr_filter(
						(posix_acl_xattr_header *)value,
						size, &new_value);
			if (unlikely(size < 0))
				return size;

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

		valid |= rce_ops2valid(rce->rce_ops);
	}
#endif
		oc = ll_mdscapa_get(inode);
		rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
				valid, name, pv, size, 0, flags,
				ll_i2suppgid(inode), &req);
		capa_put(oc);
#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 = dentry->d_inode;

	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)) {
			struct file f;
			int flags = FMODE_WRITE;
			int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
				sizeof(*lump) : sizeof(struct lov_user_md_v3);

			memset(&f, 0, sizeof(f)); /* f.f_flags is used below */
			f.f_dentry = dentry;
			rc = ll_lov_setstripe_ea_info(inode, &f, 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 = dentry->d_inode;

	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 obd_capa *oc;
	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:
		oc = ll_mdscapa_get(inode);
		rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
				valid | (rce ? rce_ops2valid(rce->rce_ops) : 0),
				name, NULL, 0, size, 0, &req);
		capa_put(oc);

		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 = dentry->d_inode;

	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 %s (%s)\n",
			       lmmsize, (int)size, dentry->d_name.name, name);
			rc = -ERANGE;
			goto out;
		}

		lump = (struct lov_user_md *)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 = dentry->d_inode;
	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	{
	63	if (!strcmp(name, POSIX_ACL_XATTR_ACCESS))
	64	return XATTR_ACL_ACCESS_T;
	65
	66	if (!strcmp(name, POSIX_ACL_XATTR_DEFAULT))
	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 PT	113	int xattr_type, rc;
d7e09d03 PT	114	struct obd_capa *oc;
9147dc8d	115	#ifdef CONFIG_FS_POSIX_ACL
1d316792	116	struct rmtacl_ctl_entry *rce = NULL;
d7e09d03	117	posix_acl_xattr_header *new_value = NULL;
d7e09d03	118	ext_acl_xattr_header *acl = NULL;
9147dc8d	119	#endif
d7e09d03	120	const char *pv = value;
d7e09d03 PT	121
	122	xattr_type = get_xattr_type(name);
	123	rc = xattr_type_filter(sbi, xattr_type);
	124	if (rc)
0a3bdb00	125	return rc;
d7e09d03	126
0667dfff LX	127	if ((xattr_type == XATTR_ACL_ACCESS_T \|\|
	128	xattr_type == XATTR_ACL_DEFAULT_T) &&
	129	!inode_owner_or_capable(inode))
	130	return -EPERM;
	131
d7e09d03 PT	132	/* b10667: ignore lustre special xattr for now */
	133	if ((xattr_type == XATTR_TRUSTED_T && strcmp(name, "trusted.lov") == 0) \|\|
	134	(xattr_type == XATTR_LUSTRE_T && strcmp(name, "lustre.lov") == 0))
0a3bdb00	135	return 0;
d7e09d03 PT	136
	137	/* b15587: ignore security.capability xattr for now */
	138	if ((xattr_type == XATTR_SECURITY_T &&
	139	strcmp(name, "security.capability") == 0))
0a3bdb00	140	return 0;
d7e09d03 PT	141
	142	/* LU-549: Disable security.selinux when selinux is disabled */
	143	if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
	144	strcmp(name, "security.selinux") == 0)
0a3bdb00	145	return -EOPNOTSUPP;
d7e09d03 PT	146
	147	#ifdef CONFIG_FS_POSIX_ACL
	148	if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
	149	(xattr_type == XATTR_ACL_ACCESS_T \|\|
	150	xattr_type == XATTR_ACL_DEFAULT_T)) {
	151	rce = rct_search(&sbi->ll_rct, current_pid());
	152	if (rce == NULL \|\|
	153	(rce->rce_ops != RMT_LSETFACL &&
	154	rce->rce_ops != RMT_RSETFACL))
0a3bdb00	155	return -EOPNOTSUPP;
d7e09d03 PT	156
	157	if (rce->rce_ops == RMT_LSETFACL) {
	158	struct eacl_entry *ee;
	159
	160	ee = et_search_del(&sbi->ll_et, current_pid(),
	161	ll_inode2fid(inode), xattr_type);
	162	LASSERT(ee != NULL);
	163	if (valid & OBD_MD_FLXATTR) {
	164	acl = lustre_acl_xattr_merge2ext(
	165	(posix_acl_xattr_header *)value,
	166	size, ee->ee_acl);
	167	if (IS_ERR(acl)) {
	168	ee_free(ee);
0a3bdb00	169	return PTR_ERR(acl);
d7e09d03 PT	170	}
	171	size = CFS_ACL_XATTR_SIZE(\
	172	le32_to_cpu(acl->a_count), \
	173	ext_acl_xattr);
	174	pv = (const char *)acl;
	175	}
	176	ee_free(ee);
	177	} else if (rce->rce_ops == RMT_RSETFACL) {
	178	size = lustre_posix_acl_xattr_filter(
	179	(posix_acl_xattr_header *)value,
	180	size, &new_value);
	181	if (unlikely(size < 0))
0a3bdb00	182	return size;
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
7fc1f831 AP	191	oc = ll_mdscapa_get(inode);
	192	rc = md_setxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
	193	valid, name, pv, size, 0, flags,
	194	ll_i2suppgid(inode), &req);
	195	capa_put(oc);
d7e09d03 PT	196	#ifdef CONFIG_FS_POSIX_ACL
	197	if (new_value != NULL)
	198	lustre_posix_acl_xattr_free(new_value, size);
	199	if (acl != NULL)
	200	lustre_ext_acl_xattr_free(acl);
	201	#endif
	202	if (rc) {
	203	if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
	204	LCONSOLE_INFO("Disabling user_xattr feature because "
	205	"it is not supported on the server\n");
	206	sbi->ll_flags &= ~LL_SBI_USER_XATTR;
	207	}
0a3bdb00	208	return rc;
d7e09d03 PT	209	}
	210
	211	ptlrpc_req_finished(req);
0a3bdb00	212	return 0;
d7e09d03 PT	213	}
	214
	215	int ll_setxattr(struct dentry dentry, const char name,
	216	const void *value, size_t size, int flags)
	217	{
	218	struct inode *inode = dentry->d_inode;
	219
	220	LASSERT(inode);
	221	LASSERT(name);
	222
	223	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
	224	inode->i_ino, inode->i_generation, inode, name);
	225
	226	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_SETXATTR, 1);
	227
	228	if ((strncmp(name, XATTR_TRUSTED_PREFIX,
	229	sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
	230	strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) \|\|
	231	(strncmp(name, XATTR_LUSTRE_PREFIX,
	232	sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
	233	strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
	234	struct lov_user_md lump = (struct lov_user_md )value;
	235	int rc = 0;
	236
87ebccf9 DC	237	if (size != 0 && size < sizeof(struct lov_user_md))
	238	return -EINVAL;
	239
d7e09d03 PT	240	/* Attributes that are saved via getxattr will always have
	241	* the stripe_offset as 0. Instead, the MDS should be
	242	* allowed to pick the starting OST index. b=17846 */
	243	if (lump != NULL && lump->lmm_stripe_offset == 0)
	244	lump->lmm_stripe_offset = -1;
	245
	246	if (lump != NULL && S_ISREG(inode->i_mode)) {
	247	struct file f;
	248	int flags = FMODE_WRITE;
	249	int lum_size = (lump->lmm_magic == LOV_USER_MAGIC_V1) ?
	250	sizeof(*lump) : sizeof(struct lov_user_md_v3);
	251
23ea7e7b	252	memset(&f, 0, sizeof(f)); /* f.f_flags is used below */
d7e09d03 PT	253	f.f_dentry = dentry;
	254	rc = ll_lov_setstripe_ea_info(inode, &f, flags, lump,
	255	lum_size);
	256	/* b10667: rc always be 0 here for now */
	257	rc = 0;
	258	} else if (S_ISDIR(inode->i_mode)) {
	259	rc = ll_dir_setstripe(inode, lump, 0);
	260	}
	261
	262	return rc;
	263
	264	} else if (strcmp(name, XATTR_NAME_LMA) == 0 \|\|
	265	strcmp(name, XATTR_NAME_LINK) == 0)
	266	return 0;
	267
	268	return ll_setxattr_common(inode, name, value, size, flags,
	269	OBD_MD_FLXATTR);
	270	}
	271
	272	int ll_removexattr(struct dentry dentry, const char name)
	273	{
	274	struct inode *inode = dentry->d_inode;
	275
	276	LASSERT(inode);
	277	LASSERT(name);
	278
	279	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
	280	inode->i_ino, inode->i_generation, inode, name);
	281
	282	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_REMOVEXATTR, 1);
	283	return ll_setxattr_common(inode, name, NULL, 0, 0,
	284	OBD_MD_FLXATTRRM);
	285	}
	286
	287	static
	288	int ll_getxattr_common(struct inode inode, const char name,
	289	void *buffer, size_t size, __u64 valid)
	290	{
	291	struct ll_sb_info *sbi = ll_i2sbi(inode);
	292	struct ptlrpc_request *req = NULL;
	293	struct mdt_body *body;
	294	int xattr_type, rc;
	295	void *xdata;
	296	struct obd_capa *oc;
	297	struct rmtacl_ctl_entry *rce = NULL;
e93a3082	298	struct ll_inode_info *lli = ll_i2info(inode);
d7e09d03 PT	299
	300	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
	301	inode->i_ino, inode->i_generation, inode);
	302
	303	/* listxattr have slightly different behavior from of ext3:
	304	* without 'user_xattr' ext3 will list all xattr names but
	305	* filtered out "^user..*"; we list them all for simplicity.
	306	*/
	307	if (!name) {
	308	xattr_type = XATTR_OTHER_T;
	309	goto do_getxattr;
	310	}
	311
	312	xattr_type = get_xattr_type(name);
	313	rc = xattr_type_filter(sbi, xattr_type);
	314	if (rc)
0a3bdb00	315	return rc;
d7e09d03 PT	316
	317	/* b15587: ignore security.capability xattr for now */
	318	if ((xattr_type == XATTR_SECURITY_T &&
	319	strcmp(name, "security.capability") == 0))
0a3bdb00	320	return -ENODATA;
d7e09d03 PT	321
	322	/* LU-549: Disable security.selinux when selinux is disabled */
	323	if (xattr_type == XATTR_SECURITY_T && !selinux_is_enabled() &&
	324	strcmp(name, "security.selinux") == 0)
0a3bdb00	325	return -EOPNOTSUPP;
d7e09d03 PT	326
	327	#ifdef CONFIG_FS_POSIX_ACL
	328	if (sbi->ll_flags & LL_SBI_RMT_CLIENT &&
	329	(xattr_type == XATTR_ACL_ACCESS_T \|\|
	330	xattr_type == XATTR_ACL_DEFAULT_T)) {
	331	rce = rct_search(&sbi->ll_rct, current_pid());
	332	if (rce == NULL \|\|
	333	(rce->rce_ops != RMT_LSETFACL &&
	334	rce->rce_ops != RMT_LGETFACL &&
	335	rce->rce_ops != RMT_RSETFACL &&
	336	rce->rce_ops != RMT_RGETFACL))
0a3bdb00	337	return -EOPNOTSUPP;
d7e09d03 PT	338	}
	339
	340	/* posix acl is under protection of LOOKUP lock. when calling to this,
	341	* we just have path resolution to the target inode, so we have great
	342	* chance that cached ACL is uptodate.
	343	*/
	344	if (xattr_type == XATTR_ACL_ACCESS_T &&
	345	!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
e93a3082	346
d7e09d03 PT	347	struct posix_acl *acl;
	348
	349	spin_lock(&lli->lli_lock);
	350	acl = posix_acl_dup(lli->lli_posix_acl);
	351	spin_unlock(&lli->lli_lock);
	352
	353	if (!acl)
0a3bdb00	354	return -ENODATA;
d7e09d03 PT	355
	356	rc = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
	357	posix_acl_release(acl);
0a3bdb00	358	return rc;
d7e09d03 PT	359	}
d7e09d03 PT	360	if (xattr_type == XATTR_ACL_DEFAULT_T && !S_ISDIR(inode->i_mode))
0a3bdb00	361	return -ENODATA;
d7e09d03 PT	362	#endif
	363
	364	do_getxattr:
e93a3082	365	if (sbi->ll_xattr_cache_enabled && xattr_type != XATTR_ACL_ACCESS_T) {
7fc1f831	366	rc = ll_xattr_cache_get(inode, name, buffer, size, valid);
e93a3082 AP	367	if (rc == -EAGAIN)
e93a3082 AP	368	goto getxattr_nocache;
7fc1f831	369	if (rc < 0)
34e1f2bb	370	goto out_xattr;
e93a3082 AP	371
	372	/* Add "system.posix_acl_access" to the list */
	373	if (lli->lli_posix_acl != NULL && valid & OBD_MD_FLXATTRLS) {
	374	if (size == 0) {
	375	rc += sizeof(XATTR_NAME_ACL_ACCESS);
	376	} else if (size - rc >= sizeof(XATTR_NAME_ACL_ACCESS)) {
	377	memcpy(buffer + rc, XATTR_NAME_ACL_ACCESS,
	378	sizeof(XATTR_NAME_ACL_ACCESS));
	379	rc += sizeof(XATTR_NAME_ACL_ACCESS);
	380	} else {
34e1f2bb JL	381	rc = -ERANGE;
34e1f2bb JL	382	goto out_xattr;
e93a3082 AP	383	}
e93a3082 AP	384	}
7fc1f831	385	} else {
e93a3082	386	getxattr_nocache:
7fc1f831 AP	387	oc = ll_mdscapa_get(inode);
	388	rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
	389	valid \| (rce ? rce_ops2valid(rce->rce_ops) : 0),
	390	name, NULL, 0, size, 0, &req);
	391	capa_put(oc);
	392
	393	if (rc < 0)
34e1f2bb	394	goto out_xattr;
7fc1f831 AP	395
	396	body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
	397	LASSERT(body);
	398
	399	/* only detect the xattr size */
34e1f2bb JL	400	if (size == 0) {
	401	rc = body->eadatasize;
	402	goto out;
	403	}
7fc1f831 AP	404
	405	if (size < body->eadatasize) {
	406	CERROR("server bug: replied size %u > %u\n",
	407	body->eadatasize, (int)size);
34e1f2bb JL	408	rc = -ERANGE;
34e1f2bb JL	409	goto out;
d7e09d03	410	}
d7e09d03	411
34e1f2bb JL	412	if (body->eadatasize == 0) {
	413	rc = -ENODATA;
	414	goto out;
	415	}
d7e09d03	416
7fc1f831 AP	417	/* do not need swab xattr data */
	418	xdata = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA,
	419	body->eadatasize);
34e1f2bb JL	420	if (!xdata) {
	421	rc = -EFAULT;
	422	goto out;
	423	}
d7e09d03	424
7fc1f831 AP	425	memcpy(buffer, xdata, body->eadatasize);
7fc1f831 AP	426	rc = body->eadatasize;
d7e09d03 PT	427	}
d7e09d03 PT	428
d7e09d03	429	#ifdef CONFIG_FS_POSIX_ACL
7fc1f831	430	if (rce && rce->rce_ops == RMT_LSETFACL) {
d7e09d03 PT	431	ext_acl_xattr_header *acl;
d7e09d03 PT	432
7fc1f831 AP	433	acl = lustre_posix_acl_xattr_2ext(
7fc1f831 AP	434	(posix_acl_xattr_header *)buffer, rc);
34e1f2bb JL	435	if (IS_ERR(acl)) {
	436	rc = PTR_ERR(acl);
	437	goto out;
	438	}
d7e09d03 PT	439
	440	rc = ee_add(&sbi->ll_et, current_pid(), ll_inode2fid(inode),
	441	xattr_type, acl);
	442	if (unlikely(rc < 0)) {
	443	lustre_ext_acl_xattr_free(acl);
34e1f2bb	444	goto out;
d7e09d03 PT	445	}
	446	}
	447	#endif
	448
7fc1f831 AP	449	out_xattr:
	450	if (rc == -EOPNOTSUPP && xattr_type == XATTR_USER_T) {
	451	LCONSOLE_INFO(
	452	"%s: disabling user_xattr feature because it is not supported on the server: rc = %d\n",
	453	ll_get_fsname(inode->i_sb, NULL, 0), rc);
	454	sbi->ll_flags &= ~LL_SBI_USER_XATTR;
d7e09d03	455	}
d7e09d03 PT	456	out:
	457	ptlrpc_req_finished(req);
	458	return rc;
	459	}
	460
	461	ssize_t ll_getxattr(struct dentry dentry, const char name,
	462	void *buffer, size_t size)
	463	{
	464	struct inode *inode = dentry->d_inode;
	465
	466	LASSERT(inode);
	467	LASSERT(name);
	468
	469	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), xattr %s\n",
	470	inode->i_ino, inode->i_generation, inode, name);
	471
	472	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_GETXATTR, 1);
	473
	474	if ((strncmp(name, XATTR_TRUSTED_PREFIX,
	475	sizeof(XATTR_TRUSTED_PREFIX) - 1) == 0 &&
	476	strcmp(name + sizeof(XATTR_TRUSTED_PREFIX) - 1, "lov") == 0) \|\|
	477	(strncmp(name, XATTR_LUSTRE_PREFIX,
	478	sizeof(XATTR_LUSTRE_PREFIX) - 1) == 0 &&
	479	strcmp(name + sizeof(XATTR_LUSTRE_PREFIX) - 1, "lov") == 0)) {
	480	struct lov_stripe_md *lsm;
	481	struct lov_user_md *lump;
	482	struct lov_mds_md *lmm = NULL;
	483	struct ptlrpc_request *request = NULL;
	484	int rc = 0, lmmsize = 0;
	485
	486	if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
	487	return -ENODATA;
	488
	489	if (size == 0 && S_ISDIR(inode->i_mode)) {
	490	/* XXX directory EA is fix for now, optimize to save
	491	* RPC transfer */
34e1f2bb JL	492	rc = sizeof(struct lov_user_md);
34e1f2bb JL	493	goto out;
d7e09d03 PT	494	}
	495
	496	lsm = ccc_inode_lsm_get(inode);
	497	if (lsm == NULL) {
	498	if (S_ISDIR(inode->i_mode)) {
	499	rc = ll_dir_getstripe(inode, &lmm,
	500	&lmmsize, &request);
	501	} else {
	502	rc = -ENODATA;
	503	}
	504	} else {
	505	/* LSM is present already after lookup/getattr call.
	506	* we need to grab layout lock once it is implemented */
	507	rc = obd_packmd(ll_i2dtexp(inode), &lmm, lsm);
	508	lmmsize = rc;
	509	}
	510	ccc_inode_lsm_put(inode, lsm);
	511
	512	if (rc < 0)
34e1f2bb	513	goto out;
d7e09d03 PT	514
	515	if (size == 0) {
	516	/* used to call ll_get_max_mdsize() forward to get
	517	* the maximum buffer size, while some apps (such as
	518	* rsync 3.0.x) care much about the exact xattr value
	519	* size */
	520	rc = lmmsize;
34e1f2bb	521	goto out;
d7e09d03 PT	522	}
	523
	524	if (size < lmmsize) {
	525	CERROR("server bug: replied size %d > %d for %s (%s)\n",
	526	lmmsize, (int)size, dentry->d_name.name, name);
34e1f2bb JL	527	rc = -ERANGE;
34e1f2bb JL	528	goto out;
d7e09d03 PT	529	}
	530
	531	lump = (struct lov_user_md *)buffer;
	532	memcpy(lump, lmm, lmmsize);
	533	/* do not return layout gen for getxattr otherwise it would
	534	* confuse tar --xattr by recognizing layout gen as stripe
	535	* offset when the file is restored. See LU-2809. */
	536	lump->lmm_layout_gen = 0;
	537
	538	rc = lmmsize;
	539	out:
	540	if (request)
	541	ptlrpc_req_finished(request);
	542	else if (lmm)
	543	obd_free_diskmd(ll_i2dtexp(inode), &lmm);
fbe7c6c7	544	return rc;
d7e09d03 PT	545	}
	546
	547	return ll_getxattr_common(inode, name, buffer, size, OBD_MD_FLXATTR);
	548	}
	549
	550	ssize_t ll_listxattr(struct dentry dentry, char buffer, size_t size)
	551	{
	552	struct inode *inode = dentry->d_inode;
	553	int rc = 0, rc2 = 0;
	554	struct lov_mds_md *lmm = NULL;
	555	struct ptlrpc_request *request = NULL;
	556	int lmmsize;
	557
	558	LASSERT(inode);
	559
	560	CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
	561	inode->i_ino, inode->i_generation, inode);
	562
	563	ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LISTXATTR, 1);
	564
	565	rc = ll_getxattr_common(inode, NULL, buffer, size, OBD_MD_FLXATTRLS);
	566	if (rc < 0)
34e1f2bb	567	goto out;
d7e09d03 PT	568
	569	if (buffer != NULL) {
	570	struct ll_sb_info *sbi = ll_i2sbi(inode);
	571	char *xattr_name = buffer;
	572	int xlen, rem = rc;
	573
	574	while (rem > 0) {
	575	xlen = strnlen(xattr_name, rem - 1) + 1;
	576	rem -= xlen;
	577	if (xattr_type_filter(sbi,
	578	get_xattr_type(xattr_name)) == 0) {
	579	/* skip OK xattr type
	580	* leave it in buffer
	581	*/
	582	xattr_name += xlen;
	583	continue;
	584	}
	585	/* move up remaining xattrs in buffer
	586	* removing the xattr that is not OK
	587	*/
	588	memmove(xattr_name, xattr_name + xlen, rem);
	589	rc -= xlen;
	590	}
	591	}
	592	if (S_ISREG(inode->i_mode)) {
	593	if (!ll_i2info(inode)->lli_has_smd)
	594	rc2 = -1;
	595	} else if (S_ISDIR(inode->i_mode)) {
	596	rc2 = ll_dir_getstripe(inode, &lmm, &lmmsize, &request);
	597	}
	598
	599	if (rc2 < 0) {
34e1f2bb JL	600	rc2 = 0;
34e1f2bb JL	601	goto out;
d7e09d03 PT	602	} else if (S_ISREG(inode->i_mode) \|\| S_ISDIR(inode->i_mode)) {
	603	const int prefix_len = sizeof(XATTR_LUSTRE_PREFIX) - 1;
	604	const size_t name_len = sizeof("lov") - 1;
	605	const size_t total_len = prefix_len + name_len + 1;
	606
cb6a2db6 KM	607	if (((rc + total_len) > size) && (buffer != NULL)) {
	608	ptlrpc_req_finished(request);
	609	return -ERANGE;
	610	}
	611
	612	if (buffer != NULL) {
d7e09d03 PT	613	buffer += rc;
	614	memcpy(buffer, XATTR_LUSTRE_PREFIX, prefix_len);
	615	memcpy(buffer + prefix_len, "lov", name_len);
	616	buffer[prefix_len + name_len] = '\0';
	617	}
	618	rc2 = total_len;
	619	}
	620	out:
	621	ptlrpc_req_finished(request);
	622	rc = rc + rc2;
	623
	624	return rc;
	625	}