David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 4 | * |
| 5 | * This copyrighted material is made available to anyone wishing to use, |
| 6 | * modify, copy, or redistribute it subject to the terms and conditions |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/spinlock.h> |
| 13 | #include <linux/completion.h> |
| 14 | #include <linux/buffer_head.h> |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 15 | #include <linux/xattr.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 16 | #include <linux/posix_acl.h> |
| 17 | #include <linux/posix_acl_xattr.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 18 | #include <linux/gfs2_ondisk.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 19 | |
| 20 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 21 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 22 | #include "acl.h" |
Steven Whitehouse | 307cf6e | 2009-08-26 18:51:04 +0100 | [diff] [blame] | 23 | #include "xattr.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 24 | #include "glock.h" |
| 25 | #include "inode.h" |
| 26 | #include "meta_io.h" |
| 27 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 28 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 29 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 30 | static const char *gfs2_acl_name(int type) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 31 | { |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 32 | switch (type) { |
| 33 | case ACL_TYPE_ACCESS: |
| 34 | return GFS2_POSIX_ACL_ACCESS; |
| 35 | case ACL_TYPE_DEFAULT: |
| 36 | return GFS2_POSIX_ACL_DEFAULT; |
| 37 | } |
| 38 | return NULL; |
| 39 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 40 | |
Steven Whitehouse | 018a01c | 2011-11-23 13:31:51 +0000 | [diff] [blame] | 41 | struct posix_acl *gfs2_get_acl(struct inode *inode, int type) |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 42 | { |
Steven Whitehouse | 018a01c | 2011-11-23 13:31:51 +0000 | [diff] [blame] | 43 | struct gfs2_inode *ip = GFS2_I(inode); |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 44 | struct posix_acl *acl; |
| 45 | const char *name; |
| 46 | char *data; |
| 47 | int len; |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 48 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 49 | if (!ip->i_eattr) |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 50 | return NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 51 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 52 | name = gfs2_acl_name(type); |
| 53 | if (name == NULL) |
| 54 | return ERR_PTR(-EINVAL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 55 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 56 | len = gfs2_xattr_acl_get(ip, name, &data); |
| 57 | if (len < 0) |
| 58 | return ERR_PTR(len); |
| 59 | if (len == 0) |
| 60 | return NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 61 | |
Eric W. Biederman | 5f3a4a2 | 2012-09-10 20:17:44 -0700 | [diff] [blame] | 62 | acl = posix_acl_from_xattr(&init_user_ns, data, len); |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 63 | kfree(data); |
| 64 | return acl; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 65 | } |
| 66 | |
Al Viro | d3fb612 | 2011-07-23 18:37:50 -0400 | [diff] [blame] | 67 | static int gfs2_set_mode(struct inode *inode, umode_t mode) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 68 | { |
Steven Whitehouse | 69dca42 | 2009-09-29 12:40:19 +0100 | [diff] [blame] | 69 | int error = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 70 | |
Steven Whitehouse | 69dca42 | 2009-09-29 12:40:19 +0100 | [diff] [blame] | 71 | if (mode != inode->i_mode) { |
Steven Whitehouse | f9425ad | 2012-05-04 14:33:06 +0100 | [diff] [blame] | 72 | inode->i_mode = mode; |
| 73 | mark_inode_dirty(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 74 | } |
| 75 | |
Steven Whitehouse | 69dca42 | 2009-09-29 12:40:19 +0100 | [diff] [blame] | 76 | return error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 77 | } |
| 78 | |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 79 | int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 80 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 81 | int error; |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 82 | int len; |
| 83 | char *data; |
| 84 | const char *name = gfs2_acl_name(type); |
| 85 | |
| 86 | BUG_ON(name == NULL); |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 87 | |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 88 | if (acl->a_count > GFS2_ACL_MAX_ENTRIES) |
Jie Liu | f2113eb | 2014-03-04 11:28:39 +0800 | [diff] [blame^] | 89 | return -E2BIG; |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 90 | |
| 91 | if (type == ACL_TYPE_ACCESS) { |
Al Viro | d695212 | 2011-07-23 18:56:36 -0400 | [diff] [blame] | 92 | umode_t mode = inode->i_mode; |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 93 | |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 94 | error = posix_acl_equiv_mode(acl, &mode); |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 95 | if (error < 0) |
| 96 | return error; |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 97 | |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 98 | if (error == 0) |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 99 | acl = NULL; |
| 100 | |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 101 | error = gfs2_set_mode(inode, mode); |
| 102 | if (error) |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 103 | return error; |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 104 | } |
| 105 | |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 106 | if (acl) { |
| 107 | len = posix_acl_to_xattr(&init_user_ns, acl, NULL, 0); |
| 108 | if (len == 0) |
| 109 | return 0; |
| 110 | data = kmalloc(len, GFP_NOFS); |
| 111 | if (data == NULL) |
| 112 | return -ENOMEM; |
| 113 | error = posix_acl_to_xattr(&init_user_ns, acl, data, len); |
| 114 | if (error < 0) |
| 115 | goto out; |
| 116 | } else { |
| 117 | data = NULL; |
| 118 | len = 0; |
Steven Whitehouse | 106381b | 2009-09-29 16:26:23 +0100 | [diff] [blame] | 119 | } |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 120 | |
| 121 | error = __gfs2_xattr_set(inode, name, data, len, 0, GFS2_EATYPE_SYS); |
| 122 | if (error) |
| 123 | goto out; |
| 124 | |
| 125 | if (acl) |
| 126 | set_cached_acl(inode, type, acl); |
| 127 | else |
| 128 | forget_cached_acl(inode, type); |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 129 | out: |
Christoph Hellwig | e01580b | 2013-12-20 05:16:52 -0800 | [diff] [blame] | 130 | kfree(data); |
Steven Whitehouse | 2646a1f | 2009-10-02 11:50:54 +0100 | [diff] [blame] | 131 | return error; |
| 132 | } |