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authorLinus Torvalds <torvalds@linux-foundation.org>2013-11-07 15:47:28 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-07 15:47:28 +0400
commita1212d278c05ca0a38f5cbd7ae90ac2e367228a8 (patch)
tree230f8bad53644f1bdd25e5c0fd892475742e7783 /fs/sysfs/mount.c
parent0b1e73ed225d8f7aeef96b74147215ca8b990dce (diff)
downloadlinux-a1212d278c05ca0a38f5cbd7ae90ac2e367228a8.tar.xz
Revert "sysfs: drop kobj_ns_type handling"
This reverts commit cb26a311578e67769e92a39a0a63476533cb7e12. It mysteriously causes NetworkManager to not find the wireless device for me. As far as I can tell, Tejun *meant* for this commit to not make any semantic changes, but there clearly are some. So revert it, taking into account some of the calling convention changes that happened in this area in subsequent commits. Cc: Tejun Heo <tj@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/sysfs/mount.c')
-rw-r--r--fs/sysfs/mount.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 8c24bce2f4ae..834ec2cdb7a3 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -36,7 +36,7 @@ static const struct super_operations sysfs_ops = {
struct sysfs_dirent sysfs_root = {
.s_name = "",
.s_count = ATOMIC_INIT(1),
- .s_flags = SYSFS_DIR,
+ .s_flags = SYSFS_DIR | (KOBJ_NS_TYPE_NONE << SYSFS_NS_TYPE_SHIFT),
.s_mode = S_IFDIR | S_IRUGO | S_IXUGO,
.s_ino = 1,
};
@@ -77,8 +77,14 @@ static int sysfs_test_super(struct super_block *sb, void *data)
{
struct sysfs_super_info *sb_info = sysfs_info(sb);
struct sysfs_super_info *info = data;
+ enum kobj_ns_type type;
+ int found = 1;
- return sb_info->ns == info->ns;
+ for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++) {
+ if (sb_info->ns[type] != info->ns[type])
+ found = 0;
+ }
+ return found;
}
static int sysfs_set_super(struct super_block *sb, void *data)
@@ -92,7 +98,9 @@ static int sysfs_set_super(struct super_block *sb, void *data)
static void free_sysfs_super_info(struct sysfs_super_info *info)
{
- kobj_ns_drop(KOBJ_NS_TYPE_NET, info->ns);
+ int type;
+ for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++)
+ kobj_ns_drop(type, info->ns[type]);
kfree(info);
}
@@ -100,6 +108,7 @@ static struct dentry *sysfs_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
struct sysfs_super_info *info;
+ enum kobj_ns_type type;
struct super_block *sb;
int error;
@@ -107,15 +116,18 @@ static struct dentry *sysfs_mount(struct file_system_type *fs_type,
if (!capable(CAP_SYS_ADMIN) && !fs_fully_visible(fs_type))
return ERR_PTR(-EPERM);
- if (!kobj_ns_current_may_mount(KOBJ_NS_TYPE_NET))
- return ERR_PTR(-EPERM);
+ for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++) {
+ if (!kobj_ns_current_may_mount(type))
+ return ERR_PTR(-EPERM);
+ }
}
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return ERR_PTR(-ENOMEM);
- info->ns = kobj_ns_grab_current(KOBJ_NS_TYPE_NET);
+ for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++)
+ info->ns[type] = kobj_ns_grab_current(type);
sb = sget(fs_type, sysfs_test_super, sysfs_set_super, flags, info);
if (IS_ERR(sb) || sb->s_fs_info != info)