Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

Pull btrfs updates from Chris Mason:
 "This is a pretty big pull, and most of these changes have been
  floating in btrfs-next for a long time.  Filipe's properties work is a
  cool building block for inheriting attributes like compression down on
  a per inode basis.

  Jeff Mahoney kicked in code to export filesystem info into sysfs.

  Otherwise, lots of performance improvements, cleanups and bug fixes.

  Looks like there are still a few other small pending incrementals, but
  I wanted to get the bulk of this in first"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (149 commits)
  Btrfs: fix spin_unlock in check_ref_cleanup
  Btrfs: setup inode location during btrfs_init_inode_locked
  Btrfs: don't use ram_bytes for uncompressed inline items
  Btrfs: fix btrfs_search_slot_for_read backwards iteration
  Btrfs: do not export ulist functions
  Btrfs: rework ulist with list+rb_tree
  Btrfs: fix memory leaks on walking backrefs failure
  Btrfs: fix send file hole detection leading to data corruption
  Btrfs: add a reschedule point in btrfs_find_all_roots()
  Btrfs: make send's file extent item search more efficient
  Btrfs: fix to catch all errors when resolving indirect ref
  Btrfs: fix protection between walking backrefs and root deletion
  btrfs: fix warning while merging two adjacent extents
  Btrfs: fix infinite path build loops in incremental send
  btrfs: undo sysfs when open_ctree() fails
  Btrfs: fix snprintf usage by send's gen_unique_name
  btrfs: fix defrag 32-bit integer overflow
  btrfs: sysfs: list the NO_HOLES feature
  btrfs: sysfs: don't show reserved incompat feature
  btrfs: call permission checks earlier in ioctls and return EPERM
  ...

4 files changed, 39 insertions, 11 deletions

diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 0616ffe4570..03f3b05e8ec 100644
--- a/include/linux/rwsem.h
+++ b/include/linux/rwsem.h
@@ -75,6 +75,17 @@ do {								\
 } while (0)
 
 /*
+ * This is the same regardless of which rwsem implementation that is being used.
+ * It is just a heuristic meant to be called by somebody alreadying holding the
+ * rwsem to see if somebody from an incompatible type is wanting access to the
+ * lock.
+ */
+static inline int rwsem_is_contended(struct rw_semaphore *sem)
+{
+	return !list_empty(&sem->wait_list);
+}
+
+/*
  * lock for reading
  */
 extern void down_read(struct rw_semaphore *sem);
diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index 4832d75dcba..3176cdc3293 100644
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -208,17 +208,18 @@ TRACE_EVENT_CONDITION(btrfs_get_extent,
 		  __entry->refs, __entry->compress_type)
 );
 
-#define show_ordered_flags(flags)					\
-	__print_symbolic(flags,						\
-		{ BTRFS_ORDERED_IO_DONE, 	"IO_DONE" 	},	\
-		{ BTRFS_ORDERED_COMPLETE, 	"COMPLETE" 	},	\
-		{ BTRFS_ORDERED_NOCOW, 		"NOCOW" 	},	\
-		{ BTRFS_ORDERED_COMPRESSED, 	"COMPRESSED" 	},	\
-		{ BTRFS_ORDERED_PREALLOC, 	"PREALLOC" 	},	\
-		{ BTRFS_ORDERED_DIRECT, 	"DIRECT" 	},	\
-		{ BTRFS_ORDERED_IOERR, 		"IOERR" 	},	\
-		{ BTRFS_ORDERED_UPDATED_ISIZE, 	"UPDATED_ISIZE"	},	\
-		{ BTRFS_ORDERED_LOGGED_CSUM, 	"LOGGED_CSUM"	})
+#define show_ordered_flags(flags)					   \
+	__print_flags(flags, "|",					   \
+		{ (1 << BTRFS_ORDERED_IO_DONE), 	"IO_DONE" 	}, \
+		{ (1 << BTRFS_ORDERED_COMPLETE), 	"COMPLETE" 	}, \
+		{ (1 << BTRFS_ORDERED_NOCOW), 		"NOCOW" 	}, \
+		{ (1 << BTRFS_ORDERED_COMPRESSED), 	"COMPRESSED" 	}, \
+		{ (1 << BTRFS_ORDERED_PREALLOC), 	"PREALLOC" 	}, \
+		{ (1 << BTRFS_ORDERED_DIRECT),	 	"DIRECT" 	}, \
+		{ (1 << BTRFS_ORDERED_IOERR), 		"IOERR" 	}, \
+		{ (1 << BTRFS_ORDERED_UPDATED_ISIZE), 	"UPDATED_ISIZE"	}, \
+		{ (1 << BTRFS_ORDERED_LOGGED_CSUM), 	"LOGGED_CSUM"	}, \
+		{ (1 << BTRFS_ORDERED_TRUNCATED), 	"TRUNCATED"	})
 
 
 DECLARE_EVENT_CLASS(btrfs__ordered_extent,
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index 45e618921c6..1b8a0f4c959 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -184,6 +184,12 @@ struct btrfs_ioctl_fs_info_args {
 	__u64 reserved[124];			/* pad to 1k */
 };
 
+struct btrfs_ioctl_feature_flags {
+	__u64 compat_flags;
+	__u64 compat_ro_flags;
+	__u64 incompat_flags;
+};
+
 /* balance control ioctl modes */
 #define BTRFS_BALANCE_CTL_PAUSE		1
 #define BTRFS_BALANCE_CTL_CANCEL	2
@@ -552,6 +558,7 @@ static inline char *btrfs_err_str(enum btrfs_err_code err_code)
 #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, __u64)
 #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
 				    struct btrfs_ioctl_space_args)
+#define BTRFS_IOC_GLOBAL_RSV _IOR(BTRFS_IOCTL_MAGIC, 20, __u64)
 #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
 #define BTRFS_IOC_WAIT_SYNC  _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
 #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
@@ -606,5 +613,11 @@ static inline char *btrfs_err_str(enum btrfs_err_code err_code)
 				    struct btrfs_ioctl_dev_replace_args)
 #define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
 					 struct btrfs_ioctl_same_args)
+#define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
+				   struct btrfs_ioctl_feature_flags)
+#define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
+				   struct btrfs_ioctl_feature_flags[2])
+#define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
+				   struct btrfs_ioctl_feature_flags[3])
 
 #endif /* _UAPI_LINUX_BTRFS_H */
diff --git a/include/uapi/linux/xattr.h b/include/uapi/linux/xattr.h
index e4629b93bdd..40bbc04b6f8 100644
--- a/include/uapi/linux/xattr.h
+++ b/include/uapi/linux/xattr.h
@@ -20,6 +20,9 @@
 #define XATTR_MAC_OSX_PREFIX "osx."
 #define XATTR_MAC_OSX_PREFIX_LEN (sizeof(XATTR_MAC_OSX_PREFIX) - 1)
 
+#define XATTR_BTRFS_PREFIX "btrfs."
+#define XATTR_BTRFS_PREFIX_LEN (sizeof(XATTR_BTRFS_PREFIX) - 1)
+
 #define XATTR_SECURITY_PREFIX	"security."
 #define XATTR_SECURITY_PREFIX_LEN (sizeof(XATTR_SECURITY_PREFIX) - 1)