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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-17 14:56:45 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-17 14:56:45 -0800
commit50652963eae6afe13678dc84d789a174306a4df7 (patch)
tree44d6bc6c2cd938cf59db7ba2b7e514d9b3665f40 /include
parente2b74f232e84dfccd0047eb47545b1d028df8ff1 (diff)
parent87b95ce0964c016ede92763be9c164e49f1019e9 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc VFS updates from Al Viro: "This cycle a lot of stuff sits on topical branches, so I'll be sending more or less one pull request per branch. This is the first pile; more to follow in a few. In this one are several misc commits from early in the cycle (before I went for separate branches), plus the rework of mntput/dput ordering on umount, switching to use of fs_pin instead of convoluted games in namespace_unlock()" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: switch the IO-triggering parts of umount to fs_pin new fs_pin killing logics allow attaching fs_pin to a group not associated with some superblock get rid of the second argument of acct_kill() take count and rcu_head out of fs_pin dcache: let the dentry count go down to zero without taking d_lock pull bumping refcount into ->kill() kill pin_put() mode_t whack-a-mole: chelsio file->f_path.dentry is pinned down for as long as the file is open... get rid of lustre_dump_dentry() gut proc_register() a bit kill d_validate() ncpfs: get rid of d_validate() nonsense selinuxfs: don't open-code d_genocide()
Diffstat (limited to 'include')
-rw-r--r--include/linux/dcache.h3
-rw-r--r--include/linux/fs_pin.h25
-rw-r--r--include/linux/lockref.h3
-rw-r--r--include/linux/pid_namespace.h4
4 files changed, 19 insertions, 16 deletions
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 5a813988e6d4..92c08cf7670e 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -319,9 +319,6 @@ static inline unsigned d_count(const struct dentry *dentry)
return dentry->d_lockref.count;
}
-/* validate "insecure" dentry pointer */
-extern int d_validate(struct dentry *, struct dentry *);
-
/*
* helper function for dentry_operations.d_dname() members
*/
diff --git a/include/linux/fs_pin.h b/include/linux/fs_pin.h
index f66525e72ccf..9dc4e0384bfb 100644
--- a/include/linux/fs_pin.h
+++ b/include/linux/fs_pin.h
@@ -1,17 +1,22 @@
-#include <linux/fs.h>
+#include <linux/wait.h>
struct fs_pin {
- atomic_long_t count;
- union {
- struct {
- struct hlist_node s_list;
- struct hlist_node m_list;
- };
- struct rcu_head rcu;
- };
+ wait_queue_head_t wait;
+ int done;
+ struct hlist_node s_list;
+ struct hlist_node m_list;
void (*kill)(struct fs_pin *);
};
-void pin_put(struct fs_pin *);
+struct vfsmount;
+
+static inline void init_fs_pin(struct fs_pin *p, void (*kill)(struct fs_pin *))
+{
+ init_waitqueue_head(&p->wait);
+ p->kill = kill;
+}
+
void pin_remove(struct fs_pin *);
+void pin_insert_group(struct fs_pin *, struct vfsmount *, struct hlist_head *);
void pin_insert(struct fs_pin *, struct vfsmount *);
+void pin_kill(struct fs_pin *);
diff --git a/include/linux/lockref.h b/include/linux/lockref.h
index 4bfde0e99ed5..b10b122dd099 100644
--- a/include/linux/lockref.h
+++ b/include/linux/lockref.h
@@ -28,12 +28,13 @@ struct lockref {
#endif
struct {
spinlock_t lock;
- unsigned int count;
+ int count;
};
};
};
extern void lockref_get(struct lockref *);
+extern int lockref_put_return(struct lockref *);
extern int lockref_get_not_zero(struct lockref *);
extern int lockref_get_or_lock(struct lockref *);
extern int lockref_put_or_lock(struct lockref *);
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index b9cf6c51b181..918b117a7cd3 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -19,7 +19,7 @@ struct pidmap {
#define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
#define PIDMAP_ENTRIES ((PID_MAX_LIMIT+BITS_PER_PAGE-1)/BITS_PER_PAGE)
-struct bsd_acct_struct;
+struct fs_pin;
struct pid_namespace {
struct kref kref;
@@ -37,7 +37,7 @@ struct pid_namespace {
struct dentry *proc_thread_self;
#endif
#ifdef CONFIG_BSD_PROCESS_ACCT
- struct bsd_acct_struct *bacct;
+ struct fs_pin *bacct;
#endif
struct user_namespace *user_ns;
struct work_struct proc_work;