Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * linux/fs/reiserfs/xattr.c |
| 4 | * |
| 5 | * Copyright (c) 2002 by Jeff Mahoney, <jeffm@suse.com> |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * In order to implement EA/ACLs in a clean, backwards compatible manner, |
| 11 | * they are implemented as files in a "private" directory. |
| 12 | * Each EA is in it's own file, with the directory layout like so (/ is assumed |
| 13 | * to be relative to fs root). Inside the /.reiserfs_priv/xattrs directory, |
| 14 | * directories named using the capital-hex form of the objectid and |
| 15 | * generation number are used. Inside each directory are individual files |
| 16 | * named with the name of the extended attribute. |
| 17 | * |
| 18 | * So, for objectid 12648430, we could have: |
| 19 | * /.reiserfs_priv/xattrs/C0FFEE.0/system.posix_acl_access |
| 20 | * /.reiserfs_priv/xattrs/C0FFEE.0/system.posix_acl_default |
| 21 | * /.reiserfs_priv/xattrs/C0FFEE.0/user.Content-Type |
| 22 | * .. or similar. |
| 23 | * |
| 24 | * The file contents are the text of the EA. The size is known based on the |
| 25 | * stat data describing the file. |
| 26 | * |
| 27 | * In the case of system.posix_acl_access and system.posix_acl_default, since |
| 28 | * these are special cases for filesystem ACLs, they are interpreted by the |
| 29 | * kernel, in addition, they are negatively and positively cached and attached |
| 30 | * to the inode so that unnecessary lookups are avoided. |
Jeff Mahoney | d984561 | 2009-03-30 14:02:35 -0400 | [diff] [blame] | 31 | * |
| 32 | * Locking works like so: |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 33 | * Directory components (xattr root, xattr dir) are protectd by their i_mutex. |
| 34 | * The xattrs themselves are protected by the xattr_sem. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | */ |
| 36 | |
Al Viro | f466c6f | 2012-03-17 01:16:43 -0400 | [diff] [blame] | 37 | #include "reiserfs.h" |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 38 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/dcache.h> |
| 40 | #include <linux/namei.h> |
| 41 | #include <linux/errno.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 42 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/fs.h> |
| 44 | #include <linux/file.h> |
| 45 | #include <linux/pagemap.h> |
| 46 | #include <linux/xattr.h> |
Al Viro | c45ac88 | 2012-03-17 00:59:06 -0400 | [diff] [blame] | 47 | #include "xattr.h" |
Al Viro | a3063ab | 2012-03-17 01:03:10 -0400 | [diff] [blame] | 48 | #include "acl.h" |
Fabian Frederick | 17093991 | 2014-08-08 14:21:12 -0700 | [diff] [blame] | 49 | #include <linux/uaccess.h> |
Al Viro | 3277c39 | 2006-11-14 21:13:53 -0800 | [diff] [blame] | 50 | #include <net/checksum.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <linux/stat.h> |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 52 | #include <linux/quotaops.h> |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 53 | #include <linux/security.h> |
Christoph Hellwig | 47f70d0 | 2013-12-20 05:16:49 -0800 | [diff] [blame] | 54 | #include <linux/posix_acl_xattr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #define PRIVROOT_NAME ".reiserfs_priv" |
| 57 | #define XAROOT_NAME "xattrs" |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 60 | /* |
| 61 | * Helpers for inode ops. We do this so that we don't have all the VFS |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 62 | * overhead and also for proper i_mutex annotation. |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 63 | * dir->i_mutex must be held for all of them. |
| 64 | */ |
Jeff Mahoney | 3a355cc | 2009-03-30 16:49:58 -0400 | [diff] [blame] | 65 | #ifdef CONFIG_REISERFS_FS_XATTR |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 66 | static int xattr_create(struct inode *dir, struct dentry *dentry, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | { |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 68 | BUG_ON(!inode_is_locked(dir)); |
Al Viro | ebfc3b4 | 2012-06-10 18:05:36 -0400 | [diff] [blame] | 69 | return dir->i_op->create(dir, dentry, mode, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | } |
Jeff Mahoney | 3a355cc | 2009-03-30 16:49:58 -0400 | [diff] [blame] | 71 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 73 | static int xattr_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 74 | { |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 75 | BUG_ON(!inode_is_locked(dir)); |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 76 | return dir->i_op->mkdir(dir, dentry, mode); |
| 77 | } |
| 78 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 79 | /* |
| 80 | * We use I_MUTEX_CHILD here to silence lockdep. It's safe because xattr |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 81 | * mutation ops aren't called during rename or splace, which are the |
| 82 | * only other users of I_MUTEX_CHILD. It violates the ordering, but that's |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 83 | * better than allocating another subclass just for this code. |
| 84 | */ |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 85 | static int xattr_unlink(struct inode *dir, struct dentry *dentry) |
| 86 | { |
| 87 | int error; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 88 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 89 | BUG_ON(!inode_is_locked(dir)); |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 90 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 91 | inode_lock_nested(d_inode(dentry), I_MUTEX_CHILD); |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 92 | error = dir->i_op->unlink(dir, dentry); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 93 | inode_unlock(d_inode(dentry)); |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 94 | |
| 95 | if (!error) |
| 96 | d_delete(dentry); |
| 97 | return error; |
| 98 | } |
| 99 | |
| 100 | static int xattr_rmdir(struct inode *dir, struct dentry *dentry) |
| 101 | { |
| 102 | int error; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 103 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 104 | BUG_ON(!inode_is_locked(dir)); |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 105 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 106 | inode_lock_nested(d_inode(dentry), I_MUTEX_CHILD); |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 107 | error = dir->i_op->rmdir(dir, dentry); |
| 108 | if (!error) |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 109 | d_inode(dentry)->i_flags |= S_DEAD; |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 110 | inode_unlock(d_inode(dentry)); |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 111 | if (!error) |
| 112 | d_delete(dentry); |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 113 | |
| 114 | return error; |
| 115 | } |
| 116 | |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 117 | #define xattr_may_create(flags) (!flags || flags & XATTR_CREATE) |
| 118 | |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 119 | static struct dentry *open_xa_root(struct super_block *sb, int flags) |
| 120 | { |
| 121 | struct dentry *privroot = REISERFS_SB(sb)->priv_root; |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 122 | struct dentry *xaroot; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 123 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 124 | if (d_really_is_negative(privroot)) |
Jeff Mahoney | 7b3ea9b | 2019-10-24 10:31:27 -0400 | [diff] [blame] | 125 | return ERR_PTR(-EOPNOTSUPP); |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 126 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 127 | inode_lock_nested(d_inode(privroot), I_MUTEX_XATTR); |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 128 | |
| 129 | xaroot = dget(REISERFS_SB(sb)->xattr_root); |
Jeff Mahoney | ceb5edc | 2009-05-17 01:02:02 -0400 | [diff] [blame] | 130 | if (!xaroot) |
Jeff Mahoney | 7b3ea9b | 2019-10-24 10:31:27 -0400 | [diff] [blame] | 131 | xaroot = ERR_PTR(-EOPNOTSUPP); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 132 | else if (d_really_is_negative(xaroot)) { |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 133 | int err = -ENODATA; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 134 | |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 135 | if (xattr_may_create(flags)) |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 136 | err = xattr_mkdir(d_inode(privroot), xaroot, 0700); |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 137 | if (err) { |
| 138 | dput(xaroot); |
| 139 | xaroot = ERR_PTR(err); |
| 140 | } |
| 141 | } |
| 142 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 143 | inode_unlock(d_inode(privroot)); |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 144 | return xaroot; |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 145 | } |
| 146 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 147 | static struct dentry *open_xa_dir(const struct inode *inode, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 149 | struct dentry *xaroot, *xadir; |
| 150 | char namebuf[17]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 152 | xaroot = open_xa_root(inode->i_sb, flags); |
Jeff Mahoney | 9b7f375 | 2007-04-23 14:41:17 -0700 | [diff] [blame] | 153 | if (IS_ERR(xaroot)) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 154 | return xaroot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 156 | snprintf(namebuf, sizeof(namebuf), "%X.%X", |
| 157 | le32_to_cpu(INODE_PKEY(inode)->k_objectid), |
| 158 | inode->i_generation); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 160 | inode_lock_nested(d_inode(xaroot), I_MUTEX_XATTR); |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 161 | |
| 162 | xadir = lookup_one_len(namebuf, xaroot, strlen(namebuf)); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 163 | if (!IS_ERR(xadir) && d_really_is_negative(xadir)) { |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 164 | int err = -ENODATA; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 165 | |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 166 | if (xattr_may_create(flags)) |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 167 | err = xattr_mkdir(d_inode(xaroot), xadir, 0700); |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 168 | if (err) { |
| 169 | dput(xadir); |
| 170 | xadir = ERR_PTR(err); |
| 171 | } |
| 172 | } |
| 173 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 174 | inode_unlock(d_inode(xaroot)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 175 | dput(xaroot); |
| 176 | return xadir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
| 178 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 179 | /* |
| 180 | * The following are side effects of other operations that aren't explicitly |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 181 | * modifying extended attributes. This includes operations such as permissions |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 182 | * or ownership changes, object deletions, etc. |
| 183 | */ |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 184 | struct reiserfs_dentry_buf { |
Al Viro | 4acf381 | 2013-05-17 22:42:17 -0400 | [diff] [blame] | 185 | struct dir_context ctx; |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 186 | struct dentry *xadir; |
| 187 | int count; |
Jann Horn | ee38053 | 2018-10-30 15:06:38 -0700 | [diff] [blame] | 188 | int err; |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 189 | struct dentry *dentries[8]; |
| 190 | }; |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 191 | |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 192 | static int |
Miklos Szeredi | ac7576f | 2014-10-30 17:37:34 +0100 | [diff] [blame] | 193 | fill_with_dentries(struct dir_context *ctx, const char *name, int namelen, |
| 194 | loff_t offset, u64 ino, unsigned int d_type) |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 195 | { |
Miklos Szeredi | ac7576f | 2014-10-30 17:37:34 +0100 | [diff] [blame] | 196 | struct reiserfs_dentry_buf *dbuf = |
| 197 | container_of(ctx, struct reiserfs_dentry_buf, ctx); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 198 | struct dentry *dentry; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 199 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 200 | WARN_ON_ONCE(!inode_is_locked(d_inode(dbuf->xadir))); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 201 | |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 202 | if (dbuf->count == ARRAY_SIZE(dbuf->dentries)) |
| 203 | return -ENOSPC; |
| 204 | |
Jan Kara | 35e5cbc | 2013-03-29 15:39:16 +0100 | [diff] [blame] | 205 | if (name[0] == '.' && (namelen < 2 || |
| 206 | (namelen == 2 && name[1] == '.'))) |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 207 | return 0; |
| 208 | |
| 209 | dentry = lookup_one_len(name, dbuf->xadir, namelen); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 210 | if (IS_ERR(dentry)) { |
Jann Horn | ee38053 | 2018-10-30 15:06:38 -0700 | [diff] [blame] | 211 | dbuf->err = PTR_ERR(dentry); |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 212 | return PTR_ERR(dentry); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 213 | } else if (d_really_is_negative(dentry)) { |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 214 | /* A directory entry exists, but no file? */ |
| 215 | reiserfs_error(dentry->d_sb, "xattr-20003", |
Al Viro | a455589 | 2014-10-21 20:11:25 -0400 | [diff] [blame] | 216 | "Corrupted directory: xattr %pd listed but " |
| 217 | "not found for file %pd.\n", |
| 218 | dentry, dbuf->xadir); |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 219 | dput(dentry); |
Jann Horn | ee38053 | 2018-10-30 15:06:38 -0700 | [diff] [blame] | 220 | dbuf->err = -EIO; |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 221 | return -EIO; |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 222 | } |
| 223 | |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 224 | dbuf->dentries[dbuf->count++] = dentry; |
| 225 | return 0; |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 226 | } |
| 227 | |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 228 | static void |
| 229 | cleanup_dentry_buf(struct reiserfs_dentry_buf *buf) |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 230 | { |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 231 | int i; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 232 | |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 233 | for (i = 0; i < buf->count; i++) |
| 234 | if (buf->dentries[i]) |
| 235 | dput(buf->dentries[i]); |
| 236 | } |
| 237 | |
| 238 | static int reiserfs_for_each_xattr(struct inode *inode, |
| 239 | int (*action)(struct dentry *, void *), |
| 240 | void *data) |
| 241 | { |
| 242 | struct dentry *dir; |
| 243 | int i, err = 0; |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 244 | struct reiserfs_dentry_buf buf = { |
Al Viro | 4acf381 | 2013-05-17 22:42:17 -0400 | [diff] [blame] | 245 | .ctx.actor = fill_with_dentries, |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 246 | }; |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 247 | |
| 248 | /* Skip out, an xattr has no xattrs associated with it */ |
| 249 | if (IS_PRIVATE(inode) || get_inode_sd_version(inode) == STAT_DATA_V1) |
| 250 | return 0; |
| 251 | |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 252 | dir = open_xa_dir(inode, XATTR_REPLACE); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 253 | if (IS_ERR(dir)) { |
| 254 | err = PTR_ERR(dir); |
| 255 | goto out; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 256 | } else if (d_really_is_negative(dir)) { |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 257 | err = 0; |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 258 | goto out_dir; |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 259 | } |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 260 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 261 | inode_lock_nested(d_inode(dir), I_MUTEX_XATTR); |
Frederic Weisbecker | 27026a0 | 2009-12-30 05:06:21 +0100 | [diff] [blame] | 262 | |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 263 | buf.xadir = dir; |
Al Viro | cd62cda | 2013-05-17 22:58:58 -0400 | [diff] [blame] | 264 | while (1) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 265 | err = reiserfs_readdir_inode(d_inode(dir), &buf.ctx); |
Al Viro | cd62cda | 2013-05-17 22:58:58 -0400 | [diff] [blame] | 266 | if (err) |
| 267 | break; |
Jann Horn | ee38053 | 2018-10-30 15:06:38 -0700 | [diff] [blame] | 268 | if (buf.err) { |
| 269 | err = buf.err; |
| 270 | break; |
| 271 | } |
Al Viro | cd62cda | 2013-05-17 22:58:58 -0400 | [diff] [blame] | 272 | if (!buf.count) |
| 273 | break; |
| 274 | for (i = 0; !err && i < buf.count && buf.dentries[i]; i++) { |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 275 | struct dentry *dentry = buf.dentries[i]; |
| 276 | |
David Howells | e36cb0b | 2015-01-29 12:02:35 +0000 | [diff] [blame] | 277 | if (!d_is_dir(dentry)) |
Al Viro | cd62cda | 2013-05-17 22:58:58 -0400 | [diff] [blame] | 278 | err = action(dentry, data); |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 279 | |
| 280 | dput(dentry); |
| 281 | buf.dentries[i] = NULL; |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 282 | } |
Al Viro | cd62cda | 2013-05-17 22:58:58 -0400 | [diff] [blame] | 283 | if (err) |
| 284 | break; |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 285 | buf.count = 0; |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 286 | } |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 287 | inode_unlock(d_inode(dir)); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 288 | |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 289 | cleanup_dentry_buf(&buf); |
| 290 | |
| 291 | if (!err) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 292 | /* |
| 293 | * We start a transaction here to avoid a ABBA situation |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 294 | * between the xattr root's i_mutex and the journal lock. |
| 295 | * This doesn't incur much additional overhead since the |
| 296 | * new transaction will just nest inside the |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 297 | * outer transaction. |
| 298 | */ |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 299 | int blocks = JOURNAL_PER_BALANCE_CNT * 2 + 2 + |
| 300 | 4 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb); |
| 301 | struct reiserfs_transaction_handle th; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 302 | |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 303 | reiserfs_write_lock(inode->i_sb); |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 304 | err = journal_begin(&th, inode->i_sb, blocks); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 305 | reiserfs_write_unlock(inode->i_sb); |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 306 | if (!err) { |
| 307 | int jerror; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 308 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 309 | inode_lock_nested(d_inode(dir->d_parent), |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 310 | I_MUTEX_XATTR); |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 311 | err = action(dir, data); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 312 | reiserfs_write_lock(inode->i_sb); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 313 | jerror = journal_end(&th); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 314 | reiserfs_write_unlock(inode->i_sb); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 315 | inode_unlock(d_inode(dir->d_parent)); |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 316 | err = jerror ?: err; |
| 317 | } |
| 318 | } |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 319 | out_dir: |
| 320 | dput(dir); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 321 | out: |
Jeff Mahoney | d28d607 | 2020-01-15 13:00:59 -0500 | [diff] [blame] | 322 | /* |
| 323 | * -ENODATA: this object doesn't have any xattrs |
| 324 | * -EOPNOTSUPP: this file system doesn't have xattrs enabled on disk. |
| 325 | * Neither are errors |
| 326 | */ |
| 327 | if (err == -ENODATA || err == -EOPNOTSUPP) |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 328 | err = 0; |
| 329 | return err; |
| 330 | } |
| 331 | |
| 332 | static int delete_one_xattr(struct dentry *dentry, void *data) |
| 333 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 334 | struct inode *dir = d_inode(dentry->d_parent); |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 335 | |
| 336 | /* This is the xattr dir, handle specially. */ |
David Howells | e36cb0b | 2015-01-29 12:02:35 +0000 | [diff] [blame] | 337 | if (d_is_dir(dentry)) |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 338 | return xattr_rmdir(dir, dentry); |
| 339 | |
| 340 | return xattr_unlink(dir, dentry); |
| 341 | } |
| 342 | |
| 343 | static int chown_one_xattr(struct dentry *dentry, void *data) |
| 344 | { |
| 345 | struct iattr *attrs = data; |
Jeff Mahoney | 4a85701 | 2013-05-31 15:54:17 -0400 | [diff] [blame] | 346 | int ia_valid = attrs->ia_valid; |
| 347 | int err; |
| 348 | |
| 349 | /* |
| 350 | * We only want the ownership bits. Otherwise, we'll do |
| 351 | * things like change a directory to a regular file if |
| 352 | * ATTR_MODE is set. |
| 353 | */ |
| 354 | attrs->ia_valid &= (ATTR_UID|ATTR_GID); |
| 355 | err = reiserfs_setattr(dentry, attrs); |
| 356 | attrs->ia_valid = ia_valid; |
| 357 | |
| 358 | return err; |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | /* No i_mutex, but the inode is unconnected. */ |
| 362 | int reiserfs_delete_xattrs(struct inode *inode) |
| 363 | { |
| 364 | int err = reiserfs_for_each_xattr(inode, delete_one_xattr, NULL); |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 365 | |
Jeff Mahoney | a41f1a4 | 2009-03-30 14:02:40 -0400 | [diff] [blame] | 366 | if (err) |
| 367 | reiserfs_warning(inode->i_sb, "jdm-20004", |
| 368 | "Couldn't delete all xattrs (%d)\n", err); |
| 369 | return err; |
| 370 | } |
| 371 | |
| 372 | /* inode->i_mutex: down */ |
| 373 | int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs) |
| 374 | { |
| 375 | int err = reiserfs_for_each_xattr(inode, chown_one_xattr, attrs); |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 376 | |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 377 | if (err) |
| 378 | reiserfs_warning(inode->i_sb, "jdm-20007", |
| 379 | "Couldn't chown all xattrs (%d)\n", err); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 380 | return err; |
| 381 | } |
| 382 | |
| 383 | #ifdef CONFIG_REISERFS_FS_XATTR |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 384 | /* |
| 385 | * Returns a dentry corresponding to a specific extended attribute file |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | * for the inode. If flags allow, the file is created. Otherwise, a |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 387 | * valid or negative dentry, or an error is returned. |
| 388 | */ |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 389 | static struct dentry *xattr_lookup(struct inode *inode, const char *name, |
| 390 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 392 | struct dentry *xadir, *xafile; |
| 393 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 395 | xadir = open_xa_dir(inode, flags); |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 396 | if (IS_ERR(xadir)) |
David Howells | e231c2e | 2008-02-07 00:15:26 -0800 | [diff] [blame] | 397 | return ERR_CAST(xadir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 399 | inode_lock_nested(d_inode(xadir), I_MUTEX_XATTR); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 400 | xafile = lookup_one_len(name, xadir, strlen(name)); |
| 401 | if (IS_ERR(xafile)) { |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 402 | err = PTR_ERR(xafile); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 403 | goto out; |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 404 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 406 | if (d_really_is_positive(xafile) && (flags & XATTR_CREATE)) |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 407 | err = -EEXIST; |
| 408 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 409 | if (d_really_is_negative(xafile)) { |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 410 | err = -ENODATA; |
Jeff Mahoney | 5a6059c | 2009-05-01 12:11:12 -0400 | [diff] [blame] | 411 | if (xattr_may_create(flags)) |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 412 | err = xattr_create(d_inode(xadir), xafile, |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 413 | 0700|S_IFREG); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 414 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 416 | if (err) |
| 417 | dput(xafile); |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 418 | out: |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 419 | inode_unlock(d_inode(xadir)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 420 | dput(xadir); |
| 421 | if (err) |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 422 | return ERR_PTR(err); |
Jeff Mahoney | 3227e14 | 2008-02-15 14:37:22 -0800 | [diff] [blame] | 423 | return xafile; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
| 425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | /* Internal operations on file data */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 427 | static inline void reiserfs_put_page(struct page *page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 429 | kunmap(page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 430 | put_page(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | |
Jeff Mahoney | ec6ea56 | 2009-03-30 14:02:30 -0400 | [diff] [blame] | 433 | static struct page *reiserfs_get_page(struct inode *dir, size_t n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 435 | struct address_space *mapping = dir->i_mapping; |
| 436 | struct page *page; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 437 | /* |
| 438 | * We can deadlock if we try to free dentries, |
| 439 | * and an unlink/rmdir has just occurred - GFP_NOFS avoids this |
| 440 | */ |
Al Viro | c4cdd03 | 2005-10-21 03:22:39 -0400 | [diff] [blame] | 441 | mapping_set_gfp_mask(mapping, GFP_NOFS); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 442 | page = read_mapping_page(mapping, n >> PAGE_SHIFT, NULL); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 443 | if (!IS_ERR(page)) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 444 | kmap(page); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 445 | if (PageError(page)) |
| 446 | goto fail; |
| 447 | } |
| 448 | return page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 450 | fail: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 451 | reiserfs_put_page(page); |
| 452 | return ERR_PTR(-EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | } |
| 454 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 455 | static inline __u32 xattr_hash(const char *msg, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 457 | return csum_partial(msg, len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | } |
| 459 | |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 460 | int reiserfs_commit_write(struct file *f, struct page *page, |
| 461 | unsigned from, unsigned to); |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 462 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 463 | static void update_ctime(struct inode *inode) |
| 464 | { |
Deepa Dinamani | 95582b0 | 2018-05-08 19:36:02 -0700 | [diff] [blame] | 465 | struct timespec64 now = current_time(inode); |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 466 | |
Al Viro | 1d3382cb | 2010-10-23 15:19:20 -0400 | [diff] [blame] | 467 | if (inode_unhashed(inode) || !inode->i_nlink || |
Deepa Dinamani | 95582b0 | 2018-05-08 19:36:02 -0700 | [diff] [blame] | 468 | timespec64_equal(&inode->i_ctime, &now)) |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 469 | return; |
| 470 | |
Deepa Dinamani | 02027d4 | 2016-09-14 07:48:05 -0700 | [diff] [blame] | 471 | inode->i_ctime = current_time(inode); |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 472 | mark_inode_dirty(inode); |
| 473 | } |
| 474 | |
| 475 | static int lookup_and_delete_xattr(struct inode *inode, const char *name) |
| 476 | { |
| 477 | int err = 0; |
| 478 | struct dentry *dentry, *xadir; |
| 479 | |
| 480 | xadir = open_xa_dir(inode, XATTR_REPLACE); |
| 481 | if (IS_ERR(xadir)) |
| 482 | return PTR_ERR(xadir); |
| 483 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 484 | inode_lock_nested(d_inode(xadir), I_MUTEX_XATTR); |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 485 | dentry = lookup_one_len(name, xadir, strlen(name)); |
| 486 | if (IS_ERR(dentry)) { |
| 487 | err = PTR_ERR(dentry); |
| 488 | goto out_dput; |
| 489 | } |
| 490 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 491 | if (d_really_is_positive(dentry)) { |
| 492 | err = xattr_unlink(d_inode(xadir), dentry); |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 493 | update_ctime(inode); |
| 494 | } |
| 495 | |
| 496 | dput(dentry); |
| 497 | out_dput: |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 498 | inode_unlock(d_inode(xadir)); |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 499 | dput(xadir); |
| 500 | return err; |
| 501 | } |
| 502 | |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 503 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | /* Generic extended attribute operations that can be used by xa plugins */ |
| 505 | |
| 506 | /* |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 507 | * inode->i_mutex: down |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | */ |
| 509 | int |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 510 | reiserfs_xattr_set_handle(struct reiserfs_transaction_handle *th, |
| 511 | struct inode *inode, const char *name, |
| 512 | const void *buffer, size_t buffer_size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 514 | int err = 0; |
Jeff Mahoney | 3227e14 | 2008-02-15 14:37:22 -0800 | [diff] [blame] | 515 | struct dentry *dentry; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 516 | struct page *page; |
| 517 | char *data; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 518 | size_t file_pos = 0; |
| 519 | size_t buffer_pos = 0; |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 520 | size_t new_size; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 521 | __u32 xahash = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 523 | if (get_inode_sd_version(inode) == STAT_DATA_V1) |
| 524 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
Frederic Weisbecker | 4f3be1b | 2010-01-05 02:14:30 +0100 | [diff] [blame] | 526 | if (!buffer) { |
| 527 | err = lookup_and_delete_xattr(inode, name); |
Frederic Weisbecker | 4f3be1b | 2010-01-05 02:14:30 +0100 | [diff] [blame] | 528 | return err; |
| 529 | } |
| 530 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 531 | dentry = xattr_lookup(inode, name, flags); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 532 | if (IS_ERR(dentry)) |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 533 | return PTR_ERR(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Frederic Weisbecker | f3e22f4 | 2010-01-03 03:44:53 +0100 | [diff] [blame] | 535 | down_write(&REISERFS_I(inode)->i_xattr_sem); |
Frederic Weisbecker | 3f14fea | 2009-12-30 07:03:53 +0100 | [diff] [blame] | 536 | |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 537 | xahash = xattr_hash(buffer, buffer_size); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 538 | while (buffer_pos < buffer_size || buffer_pos == 0) { |
| 539 | size_t chunk; |
| 540 | size_t skip = 0; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 541 | size_t page_offset = (file_pos & (PAGE_SIZE - 1)); |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 542 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 543 | if (buffer_size - buffer_pos > PAGE_SIZE) |
| 544 | chunk = PAGE_SIZE; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 545 | else |
| 546 | chunk = buffer_size - buffer_pos; |
| 547 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 548 | page = reiserfs_get_page(d_inode(dentry), file_pos); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 549 | if (IS_ERR(page)) { |
| 550 | err = PTR_ERR(page); |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 551 | goto out_unlock; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | lock_page(page); |
| 555 | data = page_address(page); |
| 556 | |
| 557 | if (file_pos == 0) { |
| 558 | struct reiserfs_xattr_header *rxh; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 559 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 560 | skip = file_pos = sizeof(struct reiserfs_xattr_header); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 561 | if (chunk + skip > PAGE_SIZE) |
| 562 | chunk = PAGE_SIZE - skip; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 563 | rxh = (struct reiserfs_xattr_header *)data; |
| 564 | rxh->h_magic = cpu_to_le32(REISERFS_XATTR_MAGIC); |
| 565 | rxh->h_hash = cpu_to_le32(xahash); |
| 566 | } |
| 567 | |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 568 | reiserfs_write_lock(inode->i_sb); |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 569 | err = __reiserfs_write_begin(page, page_offset, chunk + skip); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 570 | if (!err) { |
| 571 | if (buffer) |
| 572 | memcpy(data + skip, buffer + buffer_pos, chunk); |
Jeff Mahoney | 3227e14 | 2008-02-15 14:37:22 -0800 | [diff] [blame] | 573 | err = reiserfs_commit_write(NULL, page, page_offset, |
| 574 | page_offset + chunk + |
| 575 | skip); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 576 | } |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 577 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 578 | unlock_page(page); |
| 579 | reiserfs_put_page(page); |
| 580 | buffer_pos += chunk; |
| 581 | file_pos += chunk; |
| 582 | skip = 0; |
| 583 | if (err || buffer_size == 0 || !buffer) |
| 584 | break; |
| 585 | } |
| 586 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 587 | new_size = buffer_size + sizeof(struct reiserfs_xattr_header); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 588 | if (!err && new_size < i_size_read(d_inode(dentry))) { |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 589 | struct iattr newattrs = { |
Deepa Dinamani | 02027d4 | 2016-09-14 07:48:05 -0700 | [diff] [blame] | 590 | .ia_ctime = current_time(inode), |
Jeff Mahoney | fb2162d | 2010-04-23 13:17:41 -0400 | [diff] [blame] | 591 | .ia_size = new_size, |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 592 | .ia_valid = ATTR_SIZE | ATTR_CTIME, |
| 593 | }; |
Frederic Weisbecker | 31370f6 | 2010-01-07 15:55:31 +0100 | [diff] [blame] | 594 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 595 | inode_lock_nested(d_inode(dentry), I_MUTEX_XATTR); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 596 | inode_dio_wait(d_inode(dentry)); |
Frederic Weisbecker | 31370f6 | 2010-01-07 15:55:31 +0100 | [diff] [blame] | 597 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 598 | err = reiserfs_setattr(dentry, &newattrs); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 599 | inode_unlock(d_inode(dentry)); |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 600 | } else |
| 601 | update_ctime(inode); |
| 602 | out_unlock: |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 603 | up_write(&REISERFS_I(inode)->i_xattr_sem); |
Jeff Mahoney | 3227e14 | 2008-02-15 14:37:22 -0800 | [diff] [blame] | 604 | dput(dentry); |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 605 | return err; |
| 606 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 607 | |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 608 | /* We need to start a transaction to maintain lock ordering */ |
| 609 | int reiserfs_xattr_set(struct inode *inode, const char *name, |
| 610 | const void *buffer, size_t buffer_size, int flags) |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 611 | { |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 612 | |
| 613 | struct reiserfs_transaction_handle th; |
| 614 | int error, error2; |
| 615 | size_t jbegin_count = reiserfs_xattr_nblocks(inode, buffer_size); |
| 616 | |
Jeff Mahoney | 7b3ea9b | 2019-10-24 10:31:27 -0400 | [diff] [blame] | 617 | /* Check before we start a transaction and then do nothing. */ |
| 618 | if (!d_really_is_positive(REISERFS_SB(inode->i_sb)->priv_root)) |
| 619 | return -EOPNOTSUPP; |
| 620 | |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 621 | if (!(flags & XATTR_REPLACE)) |
| 622 | jbegin_count += reiserfs_xattr_jcreate_nblocks(inode); |
| 623 | |
| 624 | reiserfs_write_lock(inode->i_sb); |
| 625 | error = journal_begin(&th, inode->i_sb, jbegin_count); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 626 | reiserfs_write_unlock(inode->i_sb); |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 627 | if (error) { |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 628 | return error; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 629 | } |
| 630 | |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 631 | error = reiserfs_xattr_set_handle(&th, inode, name, |
| 632 | buffer, buffer_size, flags); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 633 | |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 634 | reiserfs_write_lock(inode->i_sb); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 635 | error2 = journal_end(&th); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 636 | reiserfs_write_unlock(inode->i_sb); |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 637 | if (error == 0) |
| 638 | error = error2; |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 639 | |
| 640 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | } |
| 642 | |
| 643 | /* |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 644 | * inode->i_mutex: down |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | */ |
| 646 | int |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 647 | reiserfs_xattr_get(struct inode *inode, const char *name, void *buffer, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 648 | size_t buffer_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 650 | ssize_t err = 0; |
Jeff Mahoney | 3227e14 | 2008-02-15 14:37:22 -0800 | [diff] [blame] | 651 | struct dentry *dentry; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 652 | size_t isize; |
| 653 | size_t file_pos = 0; |
| 654 | size_t buffer_pos = 0; |
| 655 | struct page *page; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 656 | __u32 hash = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 658 | if (name == NULL) |
| 659 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 661 | /* |
| 662 | * We can't have xattrs attached to v1 items since they don't have |
| 663 | * generation numbers |
| 664 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 665 | if (get_inode_sd_version(inode) == STAT_DATA_V1) |
| 666 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Jan Kara | 9fd231b | 2020-09-30 17:08:20 +0200 | [diff] [blame^] | 668 | /* |
| 669 | * priv_root needn't be initialized during mount so allow initial |
| 670 | * lookups to succeed. |
| 671 | */ |
| 672 | if (!REISERFS_SB(inode->i_sb)->priv_root) |
| 673 | return 0; |
| 674 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 675 | dentry = xattr_lookup(inode, name, XATTR_REPLACE); |
Jeff Mahoney | 3227e14 | 2008-02-15 14:37:22 -0800 | [diff] [blame] | 676 | if (IS_ERR(dentry)) { |
| 677 | err = PTR_ERR(dentry); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 678 | goto out; |
| 679 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 681 | down_read(&REISERFS_I(inode)->i_xattr_sem); |
Jeff Mahoney | d984561 | 2009-03-30 14:02:35 -0400 | [diff] [blame] | 682 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 683 | isize = i_size_read(d_inode(dentry)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 685 | /* Just return the size needed */ |
| 686 | if (buffer == NULL) { |
| 687 | err = isize - sizeof(struct reiserfs_xattr_header); |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 688 | goto out_unlock; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 689 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 691 | if (buffer_size < isize - sizeof(struct reiserfs_xattr_header)) { |
| 692 | err = -ERANGE; |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 693 | goto out_unlock; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 694 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 696 | while (file_pos < isize) { |
| 697 | size_t chunk; |
| 698 | char *data; |
| 699 | size_t skip = 0; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 700 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 701 | if (isize - file_pos > PAGE_SIZE) |
| 702 | chunk = PAGE_SIZE; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 703 | else |
| 704 | chunk = isize - file_pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 706 | page = reiserfs_get_page(d_inode(dentry), file_pos); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 707 | if (IS_ERR(page)) { |
| 708 | err = PTR_ERR(page); |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 709 | goto out_unlock; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 710 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 712 | lock_page(page); |
| 713 | data = page_address(page); |
| 714 | if (file_pos == 0) { |
| 715 | struct reiserfs_xattr_header *rxh = |
| 716 | (struct reiserfs_xattr_header *)data; |
| 717 | skip = file_pos = sizeof(struct reiserfs_xattr_header); |
| 718 | chunk -= skip; |
| 719 | /* Magic doesn't match up.. */ |
| 720 | if (rxh->h_magic != cpu_to_le32(REISERFS_XATTR_MAGIC)) { |
| 721 | unlock_page(page); |
| 722 | reiserfs_put_page(page); |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 723 | reiserfs_warning(inode->i_sb, "jdm-20001", |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 724 | "Invalid magic for xattr (%s) " |
| 725 | "associated with %k", name, |
| 726 | INODE_PKEY(inode)); |
| 727 | err = -EIO; |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 728 | goto out_unlock; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 729 | } |
| 730 | hash = le32_to_cpu(rxh->h_hash); |
| 731 | } |
| 732 | memcpy(buffer + buffer_pos, data + skip, chunk); |
| 733 | unlock_page(page); |
| 734 | reiserfs_put_page(page); |
| 735 | file_pos += chunk; |
| 736 | buffer_pos += chunk; |
| 737 | skip = 0; |
| 738 | } |
| 739 | err = isize - sizeof(struct reiserfs_xattr_header); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 741 | if (xattr_hash(buffer, isize - sizeof(struct reiserfs_xattr_header)) != |
| 742 | hash) { |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 743 | reiserfs_warning(inode->i_sb, "jdm-20002", |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 744 | "Invalid hash for xattr (%s) associated " |
| 745 | "with %k", name, INODE_PKEY(inode)); |
| 746 | err = -EIO; |
| 747 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 749 | out_unlock: |
| 750 | up_read(&REISERFS_I(inode)->i_xattr_sem); |
Jeff Mahoney | 3227e14 | 2008-02-15 14:37:22 -0800 | [diff] [blame] | 751 | dput(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 753 | out: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 754 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | } |
| 756 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 757 | /* |
| 758 | * In order to implement different sets of xattr operations for each xattr |
| 759 | * prefix with the generic xattr API, a filesystem should create a |
| 760 | * null-terminated array of struct xattr_handler (one for each prefix) and |
| 761 | * hang a pointer to it off of the s_xattr field of the superblock. |
| 762 | * |
| 763 | * The generic_fooxattr() functions will use this list to dispatch xattr |
| 764 | * operations to the correct xattr_handler. |
| 765 | */ |
| 766 | #define for_each_xattr_handler(handlers, handler) \ |
| 767 | for ((handler) = *(handlers)++; \ |
| 768 | (handler) != NULL; \ |
| 769 | (handler) = *(handlers)++) |
| 770 | |
| 771 | /* This is the implementation for the xattr plugin infrastructure */ |
Stephen Hemminger | 94d09a9 | 2010-05-13 17:53:19 -0700 | [diff] [blame] | 772 | static inline const struct xattr_handler * |
| 773 | find_xattr_handler_prefix(const struct xattr_handler **handlers, |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 774 | const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | { |
Stephen Hemminger | 94d09a9 | 2010-05-13 17:53:19 -0700 | [diff] [blame] | 776 | const struct xattr_handler *xah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 778 | if (!handlers) |
| 779 | return NULL; |
| 780 | |
| 781 | for_each_xattr_handler(handlers, xah) { |
Andreas Gruenbacher | 98e9cb5 | 2015-12-02 14:44:36 +0100 | [diff] [blame] | 782 | const char *prefix = xattr_prefix(xah); |
| 783 | if (strncmp(prefix, name, strlen(prefix)) == 0) |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 784 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | } |
| 786 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 787 | return xah; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | } |
| 789 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 790 | struct listxattr_buf { |
Al Viro | 4acf381 | 2013-05-17 22:42:17 -0400 | [diff] [blame] | 791 | struct dir_context ctx; |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 792 | size_t size; |
| 793 | size_t pos; |
| 794 | char *buf; |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 795 | struct dentry *dentry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | }; |
| 797 | |
Miklos Szeredi | ac7576f | 2014-10-30 17:37:34 +0100 | [diff] [blame] | 798 | static int listxattr_filler(struct dir_context *ctx, const char *name, |
| 799 | int namelen, loff_t offset, u64 ino, |
| 800 | unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | { |
Miklos Szeredi | ac7576f | 2014-10-30 17:37:34 +0100 | [diff] [blame] | 802 | struct listxattr_buf *b = |
| 803 | container_of(ctx, struct listxattr_buf, ctx); |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 804 | size_t size; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 805 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 806 | if (name[0] != '.' || |
| 807 | (namelen != 1 && (name[1] != '.' || namelen != 2))) { |
Stephen Hemminger | 94d09a9 | 2010-05-13 17:53:19 -0700 | [diff] [blame] | 808 | const struct xattr_handler *handler; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 809 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 810 | handler = find_xattr_handler_prefix(b->dentry->d_sb->s_xattr, |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 811 | name); |
Andreas Gruenbacher | 764a5c6 | 2015-12-02 14:44:43 +0100 | [diff] [blame] | 812 | if (!handler /* Unsupported xattr name */ || |
| 813 | (handler->list && !handler->list(b->dentry))) |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 814 | return 0; |
Andreas Gruenbacher | 764a5c6 | 2015-12-02 14:44:43 +0100 | [diff] [blame] | 815 | size = namelen + 1; |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 816 | if (b->buf) { |
Jann Horn | a13f085 | 2018-08-21 21:59:37 -0700 | [diff] [blame] | 817 | if (b->pos + size > b->size) { |
| 818 | b->pos = -ERANGE; |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 819 | return -ERANGE; |
Jann Horn | a13f085 | 2018-08-21 21:59:37 -0700 | [diff] [blame] | 820 | } |
Andreas Gruenbacher | 764a5c6 | 2015-12-02 14:44:43 +0100 | [diff] [blame] | 821 | memcpy(b->buf + b->pos, name, namelen); |
| 822 | b->buf[b->pos + namelen] = 0; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 823 | } |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 824 | b->pos += size; |
| 825 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 826 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 828 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | /* |
| 830 | * Inode operation listxattr() |
| 831 | * |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 832 | * We totally ignore the generic listxattr here because it would be stupid |
| 833 | * not to. Since the xattrs are organized in a directory, we can just |
| 834 | * readdir to find them. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 836 | ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 838 | struct dentry *dir; |
| 839 | int err = 0; |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 840 | struct listxattr_buf buf = { |
Al Viro | 4acf381 | 2013-05-17 22:42:17 -0400 | [diff] [blame] | 841 | .ctx.actor = listxattr_filler, |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 842 | .dentry = dentry, |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 843 | .buf = buffer, |
| 844 | .size = buffer ? size : 0, |
| 845 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 847 | if (d_really_is_negative(dentry)) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 848 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
Jeff Mahoney | 7b3ea9b | 2019-10-24 10:31:27 -0400 | [diff] [blame] | 850 | if (get_inode_sd_version(d_inode(dentry)) == STAT_DATA_V1) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 851 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 853 | dir = open_xa_dir(d_inode(dentry), XATTR_REPLACE); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 854 | if (IS_ERR(dir)) { |
| 855 | err = PTR_ERR(dir); |
| 856 | if (err == -ENODATA) |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 857 | err = 0; /* Not an error if there aren't any xattrs */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 858 | goto out; |
| 859 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 861 | inode_lock_nested(d_inode(dir), I_MUTEX_XATTR); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 862 | err = reiserfs_readdir_inode(d_inode(dir), &buf.ctx); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 863 | inode_unlock(d_inode(dir)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 865 | if (!err) |
| 866 | err = buf.pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
Jeff Mahoney | 3227e14 | 2008-02-15 14:37:22 -0800 | [diff] [blame] | 868 | dput(dir); |
Jeff Mahoney | 8b6dd72 | 2009-03-30 14:02:36 -0400 | [diff] [blame] | 869 | out: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 870 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | } |
| 872 | |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 873 | static int create_privroot(struct dentry *dentry) |
| 874 | { |
| 875 | int err; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 876 | struct inode *inode = d_inode(dentry->d_parent); |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 877 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 878 | WARN_ON_ONCE(!inode_is_locked(inode)); |
Jeff Mahoney | 5a6059c | 2009-05-01 12:11:12 -0400 | [diff] [blame] | 879 | |
Jeff Mahoney | 6c17675 | 2009-03-30 14:02:34 -0400 | [diff] [blame] | 880 | err = xattr_mkdir(inode, dentry, 0700); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 881 | if (err || d_really_is_negative(dentry)) { |
Al Viro | edcc37a | 2009-05-03 06:00:05 -0400 | [diff] [blame] | 882 | reiserfs_warning(dentry->d_sb, "jdm-20006", |
| 883 | "xattrs/ACLs enabled and couldn't " |
| 884 | "find/create .reiserfs_priv. " |
| 885 | "Failing mount."); |
| 886 | return -EOPNOTSUPP; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 887 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 889 | d_inode(dentry)->i_flags |= S_PRIVATE; |
Jeff Mahoney | 7b3ea9b | 2019-10-24 10:31:27 -0400 | [diff] [blame] | 890 | d_inode(dentry)->i_opflags &= ~IOP_XATTR; |
Al Viro | edcc37a | 2009-05-03 06:00:05 -0400 | [diff] [blame] | 891 | reiserfs_info(dentry->d_sb, "Created %s - reserved for xattr " |
| 892 | "storage.\n", PRIVROOT_NAME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | |
Al Viro | edcc37a | 2009-05-03 06:00:05 -0400 | [diff] [blame] | 894 | return 0; |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 895 | } |
| 896 | |
Jeff Mahoney | 12abb35 | 2009-05-17 01:02:01 -0400 | [diff] [blame] | 897 | #else |
| 898 | int __init reiserfs_xattr_register_handlers(void) { return 0; } |
| 899 | void reiserfs_xattr_unregister_handlers(void) {} |
| 900 | static int create_privroot(struct dentry *dentry) { return 0; } |
| 901 | #endif |
| 902 | |
| 903 | /* Actual operations that are exported to VFS-land */ |
Jeff Mahoney | 7b3ea9b | 2019-10-24 10:31:27 -0400 | [diff] [blame] | 904 | const struct xattr_handler *reiserfs_xattr_handlers[] = { |
Jeff Mahoney | 12abb35 | 2009-05-17 01:02:01 -0400 | [diff] [blame] | 905 | #ifdef CONFIG_REISERFS_FS_XATTR |
| 906 | &reiserfs_xattr_user_handler, |
| 907 | &reiserfs_xattr_trusted_handler, |
| 908 | #endif |
| 909 | #ifdef CONFIG_REISERFS_FS_SECURITY |
| 910 | &reiserfs_xattr_security_handler, |
| 911 | #endif |
| 912 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL |
Christoph Hellwig | 47f70d0 | 2013-12-20 05:16:49 -0800 | [diff] [blame] | 913 | &posix_acl_access_xattr_handler, |
| 914 | &posix_acl_default_xattr_handler, |
Jeff Mahoney | 12abb35 | 2009-05-17 01:02:01 -0400 | [diff] [blame] | 915 | #endif |
| 916 | NULL |
| 917 | }; |
| 918 | |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 919 | static int xattr_mount_check(struct super_block *s) |
| 920 | { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 921 | /* |
| 922 | * We need generation numbers to ensure that the oid mapping is correct |
| 923 | * v3.5 filesystems don't have them. |
| 924 | */ |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 925 | if (old_format_only(s)) { |
| 926 | if (reiserfs_xattrs_optional(s)) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 927 | /* |
| 928 | * Old format filesystem, but optional xattrs have |
| 929 | * been enabled. Error out. |
| 930 | */ |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 931 | reiserfs_warning(s, "jdm-2005", |
| 932 | "xattrs/ACLs not supported " |
| 933 | "on pre-v3.6 format filesystems. " |
| 934 | "Failing mount."); |
| 935 | return -EOPNOTSUPP; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 936 | } |
| 937 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 939 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | } |
| 941 | |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 942 | int reiserfs_permission(struct inode *inode, int mask) |
Jeff Mahoney | b83674c | 2009-05-17 01:02:03 -0400 | [diff] [blame] | 943 | { |
| 944 | /* |
| 945 | * We don't do permission checks on the internal objects. |
| 946 | * Permissions are determined by the "owning" object. |
| 947 | */ |
| 948 | if (IS_PRIVATE(inode)) |
| 949 | return 0; |
| 950 | |
Al Viro | 2830ba7 | 2011-06-20 19:16:29 -0400 | [diff] [blame] | 951 | return generic_permission(inode, mask); |
Jeff Mahoney | b83674c | 2009-05-17 01:02:03 -0400 | [diff] [blame] | 952 | } |
| 953 | |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 954 | static int xattr_hide_revalidate(struct dentry *dentry, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | { |
Jeff Mahoney | cac36f7 | 2010-04-23 13:17:37 -0400 | [diff] [blame] | 956 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | } |
| 958 | |
Al Viro | e16404e | 2009-02-20 05:55:13 +0000 | [diff] [blame] | 959 | static const struct dentry_operations xattr_lookup_poison_ops = { |
Jeff Mahoney | cac36f7 | 2010-04-23 13:17:37 -0400 | [diff] [blame] | 960 | .d_revalidate = xattr_hide_revalidate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | }; |
| 962 | |
Al Viro | edcc37a | 2009-05-03 06:00:05 -0400 | [diff] [blame] | 963 | int reiserfs_lookup_privroot(struct super_block *s) |
| 964 | { |
| 965 | struct dentry *dentry; |
| 966 | int err = 0; |
| 967 | |
| 968 | /* If we don't have the privroot located yet - go find it */ |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 969 | inode_lock(d_inode(s->s_root)); |
Al Viro | edcc37a | 2009-05-03 06:00:05 -0400 | [diff] [blame] | 970 | dentry = lookup_one_len(PRIVROOT_NAME, s->s_root, |
| 971 | strlen(PRIVROOT_NAME)); |
| 972 | if (!IS_ERR(dentry)) { |
| 973 | REISERFS_SB(s)->priv_root = dentry; |
Nick Piggin | fb045ad | 2011-01-07 17:49:55 +1100 | [diff] [blame] | 974 | d_set_d_op(dentry, &xattr_lookup_poison_ops); |
Jeff Mahoney | 7b3ea9b | 2019-10-24 10:31:27 -0400 | [diff] [blame] | 975 | if (d_really_is_positive(dentry)) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 976 | d_inode(dentry)->i_flags |= S_PRIVATE; |
Jeff Mahoney | 7b3ea9b | 2019-10-24 10:31:27 -0400 | [diff] [blame] | 977 | d_inode(dentry)->i_opflags &= ~IOP_XATTR; |
| 978 | } |
Al Viro | edcc37a | 2009-05-03 06:00:05 -0400 | [diff] [blame] | 979 | } else |
| 980 | err = PTR_ERR(dentry); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 981 | inode_unlock(d_inode(s->s_root)); |
Al Viro | edcc37a | 2009-05-03 06:00:05 -0400 | [diff] [blame] | 982 | |
| 983 | return err; |
| 984 | } |
| 985 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 986 | /* |
| 987 | * We need to take a copy of the mount flags since things like |
Linus Torvalds | 1751e8a | 2017-11-27 13:05:09 -0800 | [diff] [blame] | 988 | * SB_RDONLY don't get set until *after* we're called. |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 989 | * mount_flags != mount_options |
| 990 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 991 | int reiserfs_xattr_init(struct super_block *s, int mount_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 993 | int err = 0; |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 994 | struct dentry *privroot = REISERFS_SB(s)->priv_root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 996 | err = xattr_mount_check(s); |
| 997 | if (err) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 998 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | |
Linus Torvalds | 1751e8a | 2017-11-27 13:05:09 -0800 | [diff] [blame] | 1000 | if (d_really_is_negative(privroot) && !(mount_flags & SB_RDONLY)) { |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 1001 | inode_lock(d_inode(s->s_root)); |
Al Viro | edcc37a | 2009-05-03 06:00:05 -0400 | [diff] [blame] | 1002 | err = create_privroot(REISERFS_SB(s)->priv_root); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 1003 | inode_unlock(d_inode(s->s_root)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1004 | } |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 1005 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 1006 | if (d_really_is_positive(privroot)) { |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 1007 | inode_lock(d_inode(privroot)); |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 1008 | if (!REISERFS_SB(s)->xattr_root) { |
| 1009 | struct dentry *dentry; |
Fabian Frederick | f3fb9e2 | 2014-08-08 14:21:14 -0700 | [diff] [blame] | 1010 | |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 1011 | dentry = lookup_one_len(XAROOT_NAME, privroot, |
| 1012 | strlen(XAROOT_NAME)); |
| 1013 | if (!IS_ERR(dentry)) |
| 1014 | REISERFS_SB(s)->xattr_root = dentry; |
| 1015 | else |
| 1016 | err = PTR_ERR(dentry); |
| 1017 | } |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 1018 | inode_unlock(d_inode(privroot)); |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 1019 | } |
Jeff Mahoney | 48b32a3 | 2009-03-30 14:02:38 -0400 | [diff] [blame] | 1020 | |
Jeff Mahoney | a72bdb1 | 2009-03-30 14:02:33 -0400 | [diff] [blame] | 1021 | error: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1022 | if (err) { |
Jeff Mahoney | a228bf8 | 2014-04-23 10:00:42 -0400 | [diff] [blame] | 1023 | clear_bit(REISERFS_XATTRS_USER, &REISERFS_SB(s)->s_mount_opt); |
| 1024 | clear_bit(REISERFS_POSIXACL, &REISERFS_SB(s)->s_mount_opt); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1025 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | |
Linus Torvalds | 1751e8a | 2017-11-27 13:05:09 -0800 | [diff] [blame] | 1027 | /* The super_block SB_POSIXACL must mirror the (no)acl mount option. */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1028 | if (reiserfs_posixacl(s)) |
Linus Torvalds | 1751e8a | 2017-11-27 13:05:09 -0800 | [diff] [blame] | 1029 | s->s_flags |= SB_POSIXACL; |
Jeff Mahoney | ab17c4f | 2009-05-05 15:30:15 -0400 | [diff] [blame] | 1030 | else |
Linus Torvalds | 1751e8a | 2017-11-27 13:05:09 -0800 | [diff] [blame] | 1031 | s->s_flags &= ~SB_POSIXACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1033 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | } |