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| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-09-10 20:44:54 -0700 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-09-18 01:01:36 -0700 |
| commit | af84df93ffe3603fc6fc40a4338f9e740aad3b4e (patch) | |
| tree | 872cd463edcf18c4caba8eb218e0581c2cd91c76 /fs/ext3 | |
| parent | 5f3a4a28ec140a90e6058d1d09f6b1f235d485e5 (diff) | |
| download | lwn-af84df93ffe3603fc6fc40a4338f9e740aad3b4e.tar.gz lwn-af84df93ffe3603fc6fc40a4338f9e740aad3b4e.zip | |
userns: Convert extN to support kuids and kgids in posix acls
Convert ext2, ext3, and ext4 to fully support the posix acl changes,
using e_uid e_gid instead e_id.
Enabled building with posix acls enabled, all filesystems supporting
user namespaces, now also support posix acls when user namespaces are enabled.
Cc: Theodore Tso <tytso@mit.edu>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Jan Kara <jack@suse.cz>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'fs/ext3')
| -rw-r--r-- | fs/ext3/acl.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c index 2cf6a8044c80..dbb5ad59a7fc 100644 --- a/fs/ext3/acl.c +++ b/fs/ext3/acl.c @@ -48,16 +48,23 @@ ext3_acl_from_disk(const void *value, size_t size) case ACL_OTHER: value = (char *)value + sizeof(ext3_acl_entry_short); - acl->a_entries[n].e_id = ACL_UNDEFINED_ID; break; case ACL_USER: + value = (char *)value + sizeof(ext3_acl_entry); + if ((char *)value > end) + goto fail; + acl->a_entries[n].e_uid = + make_kuid(&init_user_ns, + le32_to_cpu(entry->e_id)); + break; case ACL_GROUP: value = (char *)value + sizeof(ext3_acl_entry); if ((char *)value > end) goto fail; - acl->a_entries[n].e_id = - le32_to_cpu(entry->e_id); + acl->a_entries[n].e_gid = + make_kgid(&init_user_ns, + le32_to_cpu(entry->e_id)); break; default: @@ -91,14 +98,19 @@ ext3_acl_to_disk(const struct posix_acl *acl, size_t *size) ext_acl->a_version = cpu_to_le32(EXT3_ACL_VERSION); e = (char *)ext_acl + sizeof(ext3_acl_header); for (n=0; n < acl->a_count; n++) { + const struct posix_acl_entry *acl_e = &acl->a_entries[n]; ext3_acl_entry *entry = (ext3_acl_entry *)e; - entry->e_tag = cpu_to_le16(acl->a_entries[n].e_tag); - entry->e_perm = cpu_to_le16(acl->a_entries[n].e_perm); - switch(acl->a_entries[n].e_tag) { + entry->e_tag = cpu_to_le16(acl_e->e_tag); + entry->e_perm = cpu_to_le16(acl_e->e_perm); + switch(acl_e->e_tag) { case ACL_USER: + entry->e_id = cpu_to_le32( + from_kuid(&init_user_ns, acl_e->e_uid)); + e += sizeof(ext3_acl_entry); + break; case ACL_GROUP: - entry->e_id = - cpu_to_le32(acl->a_entries[n].e_id); + entry->e_id = cpu_to_le32( + from_kgid(&init_user_ns, acl_e->e_gid)); e += sizeof(ext3_acl_entry); break; |