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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-09-12 19:14:33 +0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-09-12 19:14:33 +0400
commit25a765b7f05cb8460fa01b54568894b20e184862 (patch)
tree0b56db57b4d9f912393ab303c269e0fe6cdf8635 /fs/sysfs/dir.c
parent9d2be9287107695708e6aae5105a8a518a6cb4d0 (diff)
parent64282278989d5b0398dcb3ba7904cb00c621dc35 (diff)
downloadlinux-25a765b7f05cb8460fa01b54568894b20e184862.tar.xz
Merge branch 'x86/platform' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into stable/for-linus-3.7
* 'x86/platform' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (9690 commits) x86: Document x86_init.paging.pagetable_init() x86: xen: Cleanup and remove x86_init.paging.pagetable_setup_done() x86: Move paging_init() call to x86_init.paging.pagetable_init() x86: Rename pagetable_setup_start() to pagetable_init() x86: Remove base argument from x86_init.paging.pagetable_setup_start Linux 3.6-rc5 HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured Remove user-triggerable BUG from mpol_to_str xen/pciback: Fix proper FLR steps. uml: fix compile error in deliver_alarm() dj: memory scribble in logi_dj Fix order of arguments to compat_put_time[spec|val] xen: Use correct masking in xen_swiotlb_alloc_coherent. xen: fix logical error in tlb flushing xen/p2m: Fix one-off error in checking the P2M tree directory. powerpc: Don't use __put_user() in patch_instruction powerpc: Make sure IPI handlers see data written by IPI senders powerpc: Restore correct DSCR in context switch powerpc: Fix DSCR inheritance in copy_thread() powerpc: Keep thread.dscr and thread.dscr_inherit in sync ...
Diffstat (limited to 'fs/sysfs/dir.c')
-rw-r--r--fs/sysfs/dir.c41
1 files changed, 20 insertions, 21 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index e6bb9b2a4cbe..6b0bb00d4d2b 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -300,15 +300,16 @@ void release_sysfs_dirent(struct sysfs_dirent * sd)
static int sysfs_dentry_delete(const struct dentry *dentry)
{
struct sysfs_dirent *sd = dentry->d_fsdata;
- return !!(sd->s_flags & SYSFS_FLAG_REMOVED);
+ return !(sd && !(sd->s_flags & SYSFS_FLAG_REMOVED));
}
-static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd)
+static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
{
struct sysfs_dirent *sd;
int is_dir;
+ int type;
- if (nd->flags & LOOKUP_RCU)
+ if (flags & LOOKUP_RCU)
return -ECHILD;
sd = dentry->d_fsdata;
@@ -326,6 +327,15 @@ static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd)
if (strcmp(dentry->d_name.name, sd->s_name) != 0)
goto out_bad;
+ /* The sysfs dirent has been moved to a different namespace */
+ type = KOBJ_NS_TYPE_NONE;
+ if (sd->s_parent) {
+ type = sysfs_ns_type(sd->s_parent);
+ if (type != KOBJ_NS_TYPE_NONE &&
+ sysfs_info(dentry->d_sb)->ns[type] != sd->s_ns)
+ goto out_bad;
+ }
+
mutex_unlock(&sysfs_mutex);
out_valid:
return 1;
@@ -355,18 +365,15 @@ out_bad:
return 0;
}
-static void sysfs_dentry_iput(struct dentry *dentry, struct inode *inode)
+static void sysfs_dentry_release(struct dentry *dentry)
{
- struct sysfs_dirent * sd = dentry->d_fsdata;
-
- sysfs_put(sd);
- iput(inode);
+ sysfs_put(dentry->d_fsdata);
}
-static const struct dentry_operations sysfs_dentry_ops = {
+const struct dentry_operations sysfs_dentry_ops = {
.d_revalidate = sysfs_dentry_revalidate,
.d_delete = sysfs_dentry_delete,
- .d_iput = sysfs_dentry_iput,
+ .d_release = sysfs_dentry_release,
};
struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
@@ -764,7 +771,7 @@ int sysfs_create_dir(struct kobject * kobj)
}
static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct dentry *ret = NULL;
struct dentry *parent = dentry->d_parent;
@@ -786,6 +793,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
ret = ERR_PTR(-ENOENT);
goto out_unlock;
}
+ dentry->d_fsdata = sysfs_get(sd);
/* attach dentry and inode */
inode = sysfs_get_inode(dir->i_sb, sd);
@@ -795,16 +803,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
}
/* instantiate and hash dentry */
- ret = d_find_alias(inode);
- if (!ret) {
- d_set_d_op(dentry, &sysfs_dentry_ops);
- dentry->d_fsdata = sysfs_get(sd);
- d_add(dentry, inode);
- } else {
- d_move(ret, dentry);
- iput(inode);
- }
-
+ ret = d_materialise_unique(dentry, inode);
out_unlock:
mutex_unlock(&sysfs_mutex);
return ret;