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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c25a1e0671
Commit702e5bc68a("ocfs2: use generic posix ACL infrastructure") refactored code to use posix_acl_create. The problem with this function is that it is not mindful of the cluster wide inode lock making it unsuitable for use with ocfs2 inode creation with ACLs. For example, when used in ocfs2_mknod, this function can cause deadlock as follows. The parent dir inode lock is taken when calling posix_acl_create -> get_acl -> ocfs2_iop_get_acl which takes the inode lock again. This can cause deadlock if there is a blocked remote lock request waiting for the lock to be downconverted. And same deadlock happened in ocfs2_reflink. This fix is to revert back using ocfs2_init_acl. Fixes:702e5bc68a("ocfs2: use generic posix ACL infrastructure") Signed-off-by: Tariq Saeed <tariq.x.saeed@oracle.com> Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Joseph Qi <joseph.qi@huawei.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* xattr.h
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*
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* Copyright (C) 2004, 2008 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#ifndef OCFS2_XATTR_H
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#define OCFS2_XATTR_H
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#include <linux/init.h>
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#include <linux/xattr.h>
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enum ocfs2_xattr_type {
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OCFS2_XATTR_INDEX_USER = 1,
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OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS,
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OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
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OCFS2_XATTR_INDEX_TRUSTED,
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OCFS2_XATTR_INDEX_SECURITY,
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OCFS2_XATTR_MAX
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};
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struct ocfs2_security_xattr_info {
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int enable;
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const char *name;
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void *value;
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size_t value_len;
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};
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extern const struct xattr_handler ocfs2_xattr_user_handler;
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extern const struct xattr_handler ocfs2_xattr_trusted_handler;
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extern const struct xattr_handler ocfs2_xattr_security_handler;
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extern const struct xattr_handler *ocfs2_xattr_handlers[];
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ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
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int ocfs2_xattr_get_nolock(struct inode *, struct buffer_head *, int,
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const char *, void *, size_t);
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int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
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size_t, int);
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int ocfs2_xattr_set_handle(handle_t *, struct inode *, struct buffer_head *,
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int, const char *, const void *, size_t, int,
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struct ocfs2_alloc_context *,
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struct ocfs2_alloc_context *);
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int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
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struct ocfs2_dinode *di);
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int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
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int ocfs2_init_security_get(struct inode *, struct inode *,
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const struct qstr *,
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struct ocfs2_security_xattr_info *);
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int ocfs2_init_security_set(handle_t *, struct inode *,
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struct buffer_head *,
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struct ocfs2_security_xattr_info *,
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struct ocfs2_alloc_context *,
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struct ocfs2_alloc_context *);
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int ocfs2_calc_security_init(struct inode *,
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struct ocfs2_security_xattr_info *,
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int *, int *, struct ocfs2_alloc_context **);
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int ocfs2_calc_xattr_init(struct inode *, struct buffer_head *,
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umode_t, struct ocfs2_security_xattr_info *,
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int *, int *, int *);
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/*
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* xattrs can live inside an inode, as part of an external xattr block,
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* or inside an xattr bucket, which is the leaf of a tree rooted in an
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* xattr block. Some of the xattr calls, especially the value setting
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* functions, want to treat each of these locations as equal. Let's wrap
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* them in a structure that we can pass around instead of raw buffer_heads.
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*/
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struct ocfs2_xattr_value_buf {
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struct buffer_head *vb_bh;
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ocfs2_journal_access_func vb_access;
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struct ocfs2_xattr_value_root *vb_xv;
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};
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int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
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struct buffer_head *fe_bh,
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struct ocfs2_caching_info *ref_ci,
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struct buffer_head *ref_root_bh,
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struct ocfs2_cached_dealloc_ctxt *dealloc);
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int ocfs2_reflink_xattrs(struct inode *old_inode,
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struct buffer_head *old_bh,
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struct inode *new_inode,
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struct buffer_head *new_bh,
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bool preserve_security);
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int ocfs2_init_security_and_acl(struct inode *dir,
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struct inode *inode,
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const struct qstr *qstr);
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#endif /* OCFS2_XATTR_H */
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