Merge tag 'staging-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging and IIO driver updates from Greg KH:
 "Here is the big Staging and IIO driver update for 5.3-rc1.

  Lots of new IIO drivers are in here, along with loads of tiny staging
  driver cleanups and fixes. Overall we almost break even with the same
  lines added as removed.

  Full details are in the shortlog, they are too large to list here.

  All of these changes have been in linux-next for a while with no
  reported issues"

* tag 'staging-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (608 commits)
  staging: kpc2000: simplify comparison to NULL in fileops.c
  staging: kpc2000: simplify comparison to NULL in dma.c
  staging: kpc2000: simplify comparison to NULL in kpc2000_spi.c
  staging: rtl8723bs: hal: remove redundant assignment to packetType
  staging: rtl8723bs: Change return type of hal_btcoex_IsBtDisabled()
  staging: rtl8723bs: Remove rtw_btcoex_DisplayBtCoexInfo()
  staging: rtl8723bs: Remove function rtw_btcoex_GetDBG()
  staging: rtl8723bs: Remove function rtw_btcoex_SetDBG()
  staging: rtl8723bs: Remove rtw_btcoex_IsBTCoexCtrlAMPDUSize()
  staging: rtl8723bs: Remove rtw_btcoex_BtInfoNotify()
  staging: rtl8723bs: Remove rtw_btcoex_ScanNotify()
  staging: rtl8723bs: Remove rtw_btcoex_SetSingleAntPath()
  staging: rtl8723bs: Remove rtw_btcoex_SetPGAntNum()
  staging: rtl8192e: remove redundant initialization of rtstatus
  staging: rtl8723bs: Remove rtw_btcoex_GetRaMask()
  staging: rtl8723bs: Remove rtw_btcoex_SetChipType()
  staging: rtl8723bs: Remove rtw_btcoex_ConnectNotify()
  staging: rtl8723bs: Remove rtw_btcoex_SetBTCoexist()
  staging: rtl8723bs: Remove rtw_btcoex_IsBtDisabled()
  staging: rtl8723bs: Remove rtw_btcoex_IsBtControlLps()
  ...

1 files changed, 54 insertions, 14 deletions

diff --git a/drivers/staging/erofs/erofs_fs.h b/drivers/staging/erofs/erofs_fs.h
index 8ddb2b3e7d39..9f61abb7c1ca 100644
--- a/drivers/staging/erofs/erofs_fs.h
+++ b/drivers/staging/erofs/erofs_fs.h
@@ -21,7 +21,8 @@
  * Any bits that aren't in EROFS_ALL_REQUIREMENTS should be
  * incompatible with this kernel version.
  */
-#define EROFS_ALL_REQUIREMENTS  0
+#define EROFS_REQUIREMENT_LZ4_0PADDING	0x00000001
+#define EROFS_ALL_REQUIREMENTS		EROFS_REQUIREMENT_LZ4_0PADDING
 
 struct erofs_super_block {
 /*  0 */__le32 magic;           /* in the little endian */
@@ -49,19 +50,29 @@ struct erofs_super_block {
  * erofs inode data mapping:
  * 0 - inode plain without inline data A:
  * inode, [xattrs], ... | ... | no-holed data
- * 1 - inode VLE compression B:
+ * 1 - inode VLE compression B (legacy):
  * inode, [xattrs], extents ... | ...
  * 2 - inode plain with inline data C:
  * inode, [xattrs], last_inline_data, ... | ... | no-holed data
- * 3~7 - reserved
+ * 3 - inode compression D:
+ * inode, [xattrs], map_header, extents ... | ...
+ * 4~7 - reserved
  */
 enum {
-	EROFS_INODE_LAYOUT_PLAIN,
-	EROFS_INODE_LAYOUT_COMPRESSION,
-	EROFS_INODE_LAYOUT_INLINE,
+	EROFS_INODE_FLAT_PLAIN,
+	EROFS_INODE_FLAT_COMPRESSION_LEGACY,
+	EROFS_INODE_FLAT_INLINE,
+	EROFS_INODE_FLAT_COMPRESSION,
 	EROFS_INODE_LAYOUT_MAX
 };
 
+static bool erofs_inode_is_data_compressed(unsigned int datamode)
+{
+	if (datamode == EROFS_INODE_FLAT_COMPRESSION)
+		return true;
+	return datamode == EROFS_INODE_FLAT_COMPRESSION_LEGACY;
+}
+
 /* bit definitions of inode i_advise */
 #define EROFS_I_VERSION_BITS            1
 #define EROFS_I_DATA_MAPPING_BITS       3
@@ -176,11 +187,39 @@ struct erofs_xattr_entry {
 	sizeof(struct erofs_xattr_entry) + \
 	(entry)->e_name_len + le16_to_cpu((entry)->e_value_size))
 
-/* have to be aligned with 8 bytes on disk */
-struct erofs_extent_header {
-	__le32 eh_checksum;
-	__le32 eh_reserved[3];
-} __packed;
+/* available compression algorithm types */
+enum {
+	Z_EROFS_COMPRESSION_LZ4,
+	Z_EROFS_COMPRESSION_MAX
+};
+
+/*
+ * bit 0 : COMPACTED_2B indexes (0 - off; 1 - on)
+ *  e.g. for 4k logical cluster size,      4B        if compacted 2B is off;
+ *                                  (4B) + 2B + (4B) if compacted 2B is on.
+ */
+#define Z_EROFS_ADVISE_COMPACTED_2B_BIT         0
+
+#define Z_EROFS_ADVISE_COMPACTED_2B     (1 << Z_EROFS_ADVISE_COMPACTED_2B_BIT)
+
+struct z_erofs_map_header {
+	__le32	h_reserved1;
+	__le16	h_advise;
+	/*
+	 * bit 0-3 : algorithm type of head 1 (logical cluster type 01);
+	 * bit 4-7 : algorithm type of head 2 (logical cluster type 11).
+	 */
+	__u8	h_algorithmtype;
+	/*
+	 * bit 0-2 : logical cluster bits - 12, e.g. 0 for 4096;
+	 * bit 3-4 : (physical - logical) cluster bits of head 1:
+	 *       For example, if logical clustersize = 4096, 1 for 8192.
+	 * bit 5-7 : (physical - logical) cluster bits of head 2.
+	 */
+	__u8	h_clusterbits;
+};
+
+#define Z_EROFS_VLE_LEGACY_HEADER_PADDING       8
 
 /*
  * Z_EROFS Variable-sized Logical Extent cluster type:
@@ -236,8 +275,9 @@ struct z_erofs_vle_decompressed_index {
 	} di_u __packed;		/* 8 bytes */
 } __packed;
 
-#define Z_EROFS_VLE_EXTENT_ALIGN(size) round_up(size, \
-	sizeof(struct z_erofs_vle_decompressed_index))
+#define Z_EROFS_VLE_LEGACY_INDEX_ALIGN(size) \
+	(round_up(size, sizeof(struct z_erofs_vle_decompressed_index)) + \
+	 sizeof(struct z_erofs_map_header) + Z_EROFS_VLE_LEGACY_HEADER_PADDING)
 
 /* dirent sorts in alphabet order, thus we can do binary search */
 struct erofs_dirent {
@@ -270,7 +310,7 @@ static inline void erofs_check_ondisk_layout_definitions(void)
 	BUILD_BUG_ON(sizeof(struct erofs_inode_v2) != 64);
 	BUILD_BUG_ON(sizeof(struct erofs_xattr_ibody_header) != 12);
 	BUILD_BUG_ON(sizeof(struct erofs_xattr_entry) != 4);
-	BUILD_BUG_ON(sizeof(struct erofs_extent_header) != 16);
+	BUILD_BUG_ON(sizeof(struct z_erofs_map_header) != 8);
 	BUILD_BUG_ON(sizeof(struct z_erofs_vle_decompressed_index) != 8);
 	BUILD_BUG_ON(sizeof(struct erofs_dirent) != 12);