MDEV-8901: InnoDB: Punch hole is incorrecty done also to log files causing assertion and database corruption

Analysis: Problem is that punch hole does not know the actual page size
of the page and does the page belong to an data file or to a log file.

Fix: Pass down the file type and page size to os layer to be used
when trim is called. Also fix unsafe null pointer access to
actual write_size.

10 files changed, 118 insertions, 86 deletions

diff --git a/config.h.cmake b/config.h.cmake
index 066ddacfbf3..ae0306513c6 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -219,6 +219,7 @@
 #cmakedefine HAVE_POSIX_FALLOCATE 1
 #cmakedefine HAVE_LINUX_FALLOC_H 1
 #cmakedefine HAVE_FALLOCATE 1
+#cmakedefine HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE 1
 #cmakedefine HAVE_PREAD 1
 #cmakedefine HAVE_PAUSE_INSTRUCTION 1
 #cmakedefine HAVE_FAKE_PAUSE_INSTRUCTION 1
diff --git a/configure.cmake b/configure.cmake
index 5efd0f5c14b..1dade02aa32 100644
--- a/configure.cmake
+++ b/configure.cmake
@@ -1058,3 +1058,22 @@ CHECK_STRUCT_HAS_MEMBER("struct dirent" d_ino "dirent.h"  STRUCT_DIRENT_HAS_D_IN
 CHECK_STRUCT_HAS_MEMBER("struct dirent" d_namlen "dirent.h"  STRUCT_DIRENT_HAS_D_NAMLEN)
 SET(SPRINTF_RETURNS_INT 1)
 CHECK_INCLUDE_FILE(ucontext.h HAVE_UCONTEXT_H)
+
+IF(NOT MSVC)
+  CHECK_C_SOURCE_RUNS(
+  "
+  #define _GNU_SOURCE
+  #include <fcntl.h>
+  #include <linux/falloc.h>
+  int main()
+  {
+    /* Ignore the return value for now. Check if the flags exist.
+    The return value is checked  at runtime. */
+    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);
+
+    return(0);
+  }"
+  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
+  )
+ENDIF()
+
diff --git a/storage/innobase/fil/fil0fil.cc b/storage/innobase/fil/fil0fil.cc
index 48367b790ce..db304203a18 100644
--- a/storage/innobase/fil/fil0fil.cc
+++ b/storage/innobase/fil/fil0fil.cc
@@ -5223,9 +5223,9 @@ retry:
 		success = os_file_write(node->name, node->handle, buf,
 					offset, page_size * n_pages);
 #else
-		success = os_aio(OS_FILE_WRITE, OS_AIO_SYNC,
+		success = os_aio(OS_FILE_WRITE, 0, OS_AIO_SYNC,
 				 node->name, node->handle, buf,
-				 offset, page_size * n_pages,
+			         offset, page_size * n_pages, page_size,
 			         node, NULL, 0);
 #endif /* UNIV_HOTBACKUP */
 
@@ -5872,12 +5872,14 @@ fil_io(
 	/* Queue the aio request */
 	ret = os_aio(
 		type,
+		is_log,
 		mode | wake_later,
 		node->name,
 		node->handle,
 		buf,
 		offset,
 		len,
+		zip_size ? zip_size : UNIV_PAGE_SIZE,
 		node,
 		message,
 		write_size);
diff --git a/storage/innobase/include/os0file.h b/storage/innobase/include/os0file.h
index 04593f5b754..c630e91e815 100644
--- a/storage/innobase/include/os0file.h
+++ b/storage/innobase/include/os0file.h
@@ -311,10 +311,10 @@ The wrapper functions have the prefix of "innodb_". */
 # define os_file_close(file)						\
 	pfs_os_file_close_func(file, __FILE__, __LINE__)
 
-# define os_aio(type, mode, name, file, buf, offset,			\
-	n, message1, message2, write_size)				\
-	pfs_os_aio_func(type, mode, name, file, buf, offset,		\
-			n, message1, message2, write_size,              \
+# define os_aio(type, is_log, mode, name, file, buf, offset,		\
+	n, page_size, message1, message2, write_size)			\
+	pfs_os_aio_func(type, is_log, mode, name, file, buf, offset,	\
+		        n, page_size, message1, message2, write_size,	\
 		        __FILE__, __LINE__)
 
 
@@ -357,10 +357,10 @@ to original un-instrumented file I/O APIs */
 
 # define os_file_close(file)	os_file_close_func(file)
 
-# define os_aio(type, mode, name, file, buf, offset, n, message1,	\
+# define os_aio(type, is_log, mode, name, file, buf, offset, n, page_size, message1, \
 	message2, write_size)						\
-	os_aio_func(type, mode, name, file, buf, offset, n,		\
-		message1, message2, write_size)
+	os_aio_func(type, is_log, mode, name, file, buf, offset, n,	\
+		page_size, message1, message2, write_size)
 
 # define os_file_read(file, buf, offset, n)				\
 	os_file_read_func(file, buf, offset, n)
@@ -749,6 +749,7 @@ ibool
 pfs_os_aio_func(
 /*============*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	ulint		mode,	/*!< in: OS_AIO_NORMAL etc. I/O mode */
 	const char*	name,	/*!< in: name of the file or path as a
 				null-terminated string */
@@ -757,6 +758,7 @@ pfs_os_aio_func(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset where to read or write */
 	ulint		n,	/*!< in: number of bytes to read or write */
+	ulint           page_size, /*!< in: page size in bytes */
 	fil_node_t*	message1,/*!< in: message for the aio handler
 				(can be used to identify a completed
 				aio operation); ignored if mode is
@@ -1107,6 +1109,7 @@ ibool
 os_aio_func(
 /*========*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	ulint		mode,	/*!< in: OS_AIO_NORMAL, ..., possibly ORed
 				to OS_AIO_SIMULATED_WAKE_LATER: the
 				last flag advises this function not to wake
@@ -1127,6 +1130,7 @@ os_aio_func(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset where to read or write */
 	ulint		n,	/*!< in: number of bytes to read or write */
+	ulint           page_size, /*!< in: page size in bytes */
 	fil_node_t*	message1,/*!< in: message for the aio handler
 				(can be used to identify a completed
 				aio operation); ignored if mode is
diff --git a/storage/innobase/include/os0file.ic b/storage/innobase/include/os0file.ic
index db525bcea19..6ca8b371093 100644
--- a/storage/innobase/include/os0file.ic
+++ b/storage/innobase/include/os0file.ic
@@ -199,6 +199,7 @@ ibool
 pfs_os_aio_func(
 /*============*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	ulint		mode,	/*!< in: OS_AIO_NORMAL etc. I/O mode */
 	const char*	name,	/*!< in: name of the file or path as a
 				null-terminated string */
@@ -207,6 +208,7 @@ pfs_os_aio_func(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset where to read or write */
 	ulint		n,	/*!< in: number of bytes to read or write */
+	ulint           page_size, /*!< in: page size in bytes */
 	fil_node_t*	message1,/*!< in: message for the aio handler
 				(can be used to identify a completed
 				aio operation); ignored if mode is
@@ -234,8 +236,8 @@ pfs_os_aio_func(
 					: PSI_FILE_READ,
 				   src_file, src_line);
 
-	result = os_aio_func(type, mode, name, file, buf, offset,
-		n, message1, message2, write_size);
+	result = os_aio_func(type, is_log, mode, name, file, buf, offset,
+			     n, page_size, message1, message2, write_size);
 
 	register_pfs_file_io_end(locker, n);
 
diff --git a/storage/innobase/os/os0file.cc b/storage/innobase/os/os0file.cc
index 7aa321cfddb..03beeca6591 100644
--- a/storage/innobase/os/os0file.cc
+++ b/storage/innobase/os/os0file.cc
@@ -49,9 +49,8 @@ Created 10/21/1995 Heikki Tuuri
 #include "buf0buf.h"
 #include "srv0mon.h"
 #include "srv0srv.h"
-#ifdef HAVE_POSIX_FALLOCATE
+#ifdef HAVE_LINUX_UNISTD_H
 #include "unistd.h"
-#include "fcntl.h"
 #endif
 #ifndef UNIV_HOTBACKUP
 # include "os0sync.h"
@@ -84,14 +83,10 @@ Created 10/21/1995 Heikki Tuuri
 #include <linux/falloc.h>
 #endif
 
-#if defined(HAVE_FALLOCATE)
-#ifndef FALLOC_FL_KEEP_SIZE
-#define FALLOC_FL_KEEP_SIZE 0x01
-#endif
-#ifndef FALLOC_FL_PUNCH_HOLE
-#define FALLOC_FL_PUNCH_HOLE 0x02
-#endif
-#endif
+#ifdef HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
+# include <fcntl.h>
+# include <linux/falloc.h>
+#endif /* HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE */
 
 #ifdef HAVE_LZO
 #include "lzo/lzo1x.h"
@@ -209,6 +204,9 @@ struct os_aio_slot_t{
 					write */
 	byte*		buf;		/*!< buffer used in i/o */
 	ulint		type;		/*!< OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log;		/*!< 1 if OS_FILE_LOG or 0 */
+	ulint		page_size;      /*!< UNIV_PAGE_SIZE or zip_size */
+
 	os_offset_t	offset;		/*!< file offset in bytes */
 	os_file_t	file;		/*!< file where to read or write */
 	const char*	name;		/*!< file name or path */
@@ -4474,6 +4472,7 @@ os_aio_slot_t*
 os_aio_array_reserve_slot(
 /*======================*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	os_aio_array_t*	array,	/*!< in: aio array */
 	fil_node_t*	message1,/*!< in: message to be passed along with
 				the aio operation */
@@ -4486,6 +4485,7 @@ os_aio_array_reserve_slot(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset */
 	ulint		len,	/*!< in: length of the block to read or write */
+	ulint           page_size, /*!< in: page size in bytes */
 	ulint*		write_size)/*!< in/out: Actual write size initialized
 			       after fist successfull trim
 			       operation for this page and if
@@ -4580,6 +4580,8 @@ found:
 	slot->offset   = offset;
 	slot->io_already_done = FALSE;
 	slot->write_size = write_size;
+	slot->is_log   = is_log;
+	slot->page_size = page_size;
 
 	if (message1) {
 		slot->file_block_size = fil_node_get_block_size(message1);
@@ -4836,6 +4838,7 @@ ibool
 os_aio_func(
 /*========*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	ulint		mode,	/*!< in: OS_AIO_NORMAL, ..., possibly ORed
 				to OS_AIO_SIMULATED_WAKE_LATER: the
 				last flag advises this function not to wake
@@ -4856,6 +4859,7 @@ os_aio_func(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset where to read or write */
 	ulint		n,	/*!< in: number of bytes to read or write */
+	ulint           page_size, /*!< in: page size in bytes */
 	fil_node_t*	message1,/*!< in: message for the aio handler
 				(can be used to identify a completed
 				aio operation); ignored if mode is
@@ -4982,8 +4986,8 @@ try_again:
 		array = NULL; /* Eliminate compiler warning */
 	}
 
-	slot = os_aio_array_reserve_slot(type, array, message1, message2, file,
-		name, buf, offset, n, write_size);
+	slot = os_aio_array_reserve_slot(type, is_log, array, message1, message2, file,
+					 name, buf, offset, n, page_size, write_size);
 
 	if (type == OS_FILE_READ) {
 		if (srv_use_native_aio) {
@@ -5251,7 +5255,10 @@ os_aio_windows_handle(
 		ret_val = ret && len == slot->len;
 	}
 
-	if (slot->type == OS_FILE_WRITE && srv_use_trim && os_fallocate_failed == FALSE) {
+	if (slot->type == OS_FILE_WRITE &&
+	    !slot->is_log &&
+	    srv_use_trim &&
+	    os_fallocate_failed == FALSE) {
 		// Deallocate unused blocks from file system
 		os_file_trim(slot);
 	}
@@ -5345,7 +5352,10 @@ retry:
 			/* We have not overstepped to next segment. */
 			ut_a(slot->pos < end_pos);
 
-			if (slot->type == OS_FILE_WRITE && srv_use_trim && os_fallocate_failed == FALSE) {
+			if (slot->type == OS_FILE_WRITE &&
+			    !slot->is_log &&
+			    srv_use_trim &&
+			    os_fallocate_failed == FALSE) {
 				// Deallocate unused blocks from file system
 				os_file_trim(slot);
 			}
@@ -6220,19 +6230,13 @@ os_file_trim(
 {
 
 	size_t len = slot->len;
-	size_t trim_len = UNIV_PAGE_SIZE - len;
+	size_t trim_len = slot->page_size - len;
 	os_offset_t off = slot->offset + len;
 	size_t bsize = slot->file_block_size;
 
-	// len here should be alligned to sector size
-	ut_ad((trim_len % bsize) == 0);
-	ut_ad((len % bsize) == 0);
-	ut_ad(bsize != 0);
-	ut_ad((off % bsize) == 0);
-
 #ifdef UNIV_TRIM_DEBUG
 	fprintf(stderr, "Note: TRIM: write_size %lu trim_len %lu len %lu off %lu bz %lu\n",
-		*slot->write_size, trim_len, len, off, bsize);
+		slot->write_size ? *slot->write_size : 0, trim_len, len, off, bsize);
 #endif
 
 	// Nothing to do if trim length is zero or if actual write
@@ -6247,22 +6251,19 @@ os_file_trim(
 		    *slot->write_size > 0 &&
 		    len >= *slot->write_size)) {
 
-#ifdef UNIV_PAGECOMPRESS_DEBUG
-		fprintf(stderr, "Note: TRIM: write_size %lu trim_len %lu len %lu\n",
-			*slot->write_size, trim_len, len);
-#endif
+		if (slot->write_size) {
+			if (*slot->write_size > 0 && len >= *slot->write_size) {
+				srv_stats.page_compressed_trim_op_saved.inc();
+			}
 
-		if (*slot->write_size > 0 && len >= *slot->write_size) {
-			srv_stats.page_compressed_trim_op_saved.inc();
+			*slot->write_size = len;
 		}
 
-		*slot->write_size = len;
-
 		return (TRUE);
 	}
 
 #ifdef __linux__
-#if defined(HAVE_FALLOCATE)
+#if defined(HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE)
 	int ret = fallocate(slot->file, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, off, trim_len);
 
 	if (ret) {
@@ -6300,7 +6301,7 @@ os_file_trim(
 		*slot->write_size = 0;
 	}
 
-#endif /* HAVE_FALLOCATE ... */
+#endif /* HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE ... */
 
 #elif defined(_WIN32)
 	FILE_LEVEL_TRIM flt;
diff --git a/storage/xtradb/fil/fil0fil.cc b/storage/xtradb/fil/fil0fil.cc
index 45bb32d9b9d..70f0ee14ab5 100644
--- a/storage/xtradb/fil/fil0fil.cc
+++ b/storage/xtradb/fil/fil0fil.cc
@@ -5253,9 +5253,9 @@ retry:
 		success = os_file_write(node->name, node->handle, buf,
 					offset, page_size * n_pages);
 #else
-		success = os_aio(OS_FILE_WRITE, OS_AIO_SYNC,
+		success = os_aio(OS_FILE_WRITE, 0, OS_AIO_SYNC,
 				 node->name, node->handle, buf,
-				 offset, page_size * n_pages,
+				 offset, page_size * n_pages, page_size,
 				 node, NULL, space_id, NULL, 0);
 #endif /* UNIV_HOTBACKUP */
 
@@ -5918,12 +5918,14 @@ _fil_io(
 	/* Queue the aio request */
 	ret = os_aio(
 		type,
+		is_log,
 		mode | wake_later,
 		node->name,
 		node->handle,
 		buf,
 		offset,
 		len,
+		zip_size ? zip_size : UNIV_PAGE_SIZE,
 		node,
 		message,
 		space_id,
diff --git a/storage/xtradb/include/os0file.h b/storage/xtradb/include/os0file.h
index e9faac0d945..b1058f07c8e 100644
--- a/storage/xtradb/include/os0file.h
+++ b/storage/xtradb/include/os0file.h
@@ -321,11 +321,11 @@ The wrapper functions have the prefix of "innodb_". */
 # define os_file_close(file)						\
 	pfs_os_file_close_func(file, __FILE__, __LINE__)
 
-# define os_aio(type, mode, name, file, buf, offset,			\
-	n, message1, message2, space_id, 				\
+# define os_aio(type, is_log, mode, name, file, buf, offset,		\
+	n, page_size, message1, message2, space_id,			\
 	trx, write_size) 					 	\
-	pfs_os_aio_func(type, mode, name, file, buf, offset,		\
-		n, message1, message2, space_id, trx, write_size,	\
+	pfs_os_aio_func(type, is_log, mode, name, file, buf, offset,	\
+		n, page_size, message1, message2, space_id, trx, write_size, \
 		__FILE__, __LINE__)
 
 # define os_file_read(file, buf, offset, n)				\
@@ -372,10 +372,10 @@ to original un-instrumented file I/O APIs */
 
 # define os_file_close(file)	os_file_close_func(file)
 
-# define os_aio(type, mode, name, file, buf, offset, n, message1,	\
+# define os_aio(type, is_log, mode, name, file, buf, offset, n, page_size, message1, \
 	message2, space_id, trx, write_size)				\
-	os_aio_func(type, mode, name, file, buf, offset, n,		\
-		message1, message2, space_id, trx, write_size)
+	os_aio_func(type, is_log, mode, name, file, buf, offset, n,	\
+		page_size, message1, message2, space_id, trx, write_size)
 
 # define os_file_read(file, buf, offset, n)				\
 	os_file_read_func(file, buf, offset, n, NULL)
@@ -772,6 +772,7 @@ ibool
 pfs_os_aio_func(
 /*============*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	ulint		mode,	/*!< in: OS_AIO_NORMAL etc. I/O mode */
 	const char*	name,	/*!< in: name of the file or path as a
 				null-terminated string */
@@ -780,6 +781,7 @@ pfs_os_aio_func(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset where to read or write */
 	ulint		n,	/*!< in: number of bytes to read or write */
+	ulint		page_size,/*!< in: page size in bytes */
 	fil_node_t*	message1,/*!< in: message for the aio handler
 				(can be used to identify a completed
 				aio operation); ignored if mode is
@@ -1139,6 +1141,7 @@ ibool
 os_aio_func(
 /*========*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	ulint		mode,	/*!< in: OS_AIO_NORMAL, ..., possibly ORed
 				to OS_AIO_SIMULATED_WAKE_LATER: the
 				last flag advises this function not to wake
@@ -1159,6 +1162,7 @@ os_aio_func(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset where to read or write */
 	ulint		n,	/*!< in: number of bytes to read or write */
+	ulint		page_size, /*!< in: page size in bytes */
 	fil_node_t*	message1,/*!< in: message for the aio handler
 				(can be used to identify a completed
 				aio operation); ignored if mode is
diff --git a/storage/xtradb/include/os0file.ic b/storage/xtradb/include/os0file.ic
index b25f1577362..b284d7ea9ac 100644
--- a/storage/xtradb/include/os0file.ic
+++ b/storage/xtradb/include/os0file.ic
@@ -202,6 +202,7 @@ ibool
 pfs_os_aio_func(
 /*============*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	ulint		mode,	/*!< in: OS_AIO_NORMAL etc. I/O mode */
 	const char*	name,	/*!< in: name of the file or path as a
 				null-terminated string */
@@ -210,6 +211,7 @@ pfs_os_aio_func(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset where to read or write */
 	ulint		n,	/*!< in: number of bytes to read or write */
+	ulint		page_size, /*!< in: page size in bytes */
 	fil_node_t*	message1,/*!< in: message for the aio handler
 				(can be used to identify a completed
 				aio operation); ignored if mode is
@@ -239,8 +241,8 @@ pfs_os_aio_func(
 					: PSI_FILE_READ,
 				   src_file, src_line);
 
-	result = os_aio_func(type, mode, name, file, buf, offset,
-			     n, message1, message2, space_id, trx,
+	result = os_aio_func(type, is_log, mode, name, file, buf, offset,
+			     n, page_size, message1, message2, space_id, trx,
 			     write_size);
 
 	register_pfs_file_io_end(locker, n);
diff --git a/storage/xtradb/os/os0file.cc b/storage/xtradb/os/os0file.cc
index 9ef9adf5b74..e87ce888e10 100644
--- a/storage/xtradb/os/os0file.cc
+++ b/storage/xtradb/os/os0file.cc
@@ -50,9 +50,8 @@ Created 10/21/1995 Heikki Tuuri
 #include "trx0trx.h"
 #include "srv0mon.h"
 #include "srv0srv.h"
-#ifdef HAVE_POSIX_FALLOCATE
+#ifdef HAVE_LINUX_UNISTD_H
 #include "unistd.h"
-#include "fcntl.h"
 #endif
 #ifndef UNIV_HOTBACKUP
 # include "os0sync.h"
@@ -89,14 +88,10 @@ Created 10/21/1995 Heikki Tuuri
 #include <linux/falloc.h>
 #endif
 
-#if defined(HAVE_FALLOCATE)
-#ifndef FALLOC_FL_KEEP_SIZE
-#define FALLOC_FL_KEEP_SIZE 0x01
-#endif
-#ifndef FALLOC_FL_PUNCH_HOLE
-#define FALLOC_FL_PUNCH_HOLE 0x02
-#endif
-#endif
+#ifdef HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
+# include <fcntl.h>
+# include <linux/falloc.h>
+#endif /* HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE */
 
 #ifdef HAVE_LZO
 #include "lzo/lzo1x.h"
@@ -221,6 +216,9 @@ struct os_aio_slot_t{
 					write */
 	byte*		buf;		/*!< buffer used in i/o */
 	ulint		type;		/*!< OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log;		/*!< 1 is OS_FILE_LOG or 0 */
+	ulint		page_size;	/*!< UNIV_PAGE_SIZE or zip_size */
+
 	os_offset_t	offset;		/*!< file offset in bytes */
 	os_file_t	file;		/*!< file where to read or write */
 	const char*	name;		/*!< file name or path */
@@ -4573,6 +4571,7 @@ os_aio_slot_t*
 os_aio_array_reserve_slot(
 /*======================*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	os_aio_array_t*	array,	/*!< in: aio array */
 	fil_node_t*	message1,/*!< in: message to be passed along with
 				the aio operation */
@@ -4585,6 +4584,7 @@ os_aio_array_reserve_slot(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset */
 	ulint		len,	/*!< in: length of the block to read or write */
+	ulint		page_size, /*!< in: page size in bytes */
 	ulint		space_id,
 	ulint*		write_size)/*!< in/out: Actual write size initialized
 			       after first successfull trim
@@ -4681,6 +4681,8 @@ found:
 	slot->offset   = offset;
 	slot->io_already_done = FALSE;
 	slot->space_id = space_id;
+	slot->is_log   = is_log;
+	slot->page_size = page_size;
 
 	if (message1) {
 		slot->file_block_size = fil_node_get_block_size(message1);
@@ -4934,6 +4936,7 @@ ibool
 os_aio_func(
 /*========*/
 	ulint		type,	/*!< in: OS_FILE_READ or OS_FILE_WRITE */
+	ulint		is_log,	/*!< in: 1 is OS_FILE_LOG or 0 */
 	ulint		mode,	/*!< in: OS_AIO_NORMAL, ..., possibly ORed
 				to OS_AIO_SIMULATED_WAKE_LATER: the
 				last flag advises this function not to wake
@@ -4954,6 +4957,7 @@ os_aio_func(
 				to write */
 	os_offset_t	offset,	/*!< in: file offset where to read or write */
 	ulint		n,	/*!< in: number of bytes to read or write */
+	ulint		page_size, /*!< in: page size in bytes */
 	fil_node_t*	message1,/*!< in: message for the aio handler
 				(can be used to identify a completed
 				aio operation); ignored if mode is
@@ -5072,8 +5076,8 @@ try_again:
 		trx->io_read += n;
 	}
 
-	slot = os_aio_array_reserve_slot(type, array, message1, message2, file,
-					 name, buf, offset, n, space_id,
+	slot = os_aio_array_reserve_slot(type, is_log, array, message1, message2, file,
+		                         name, buf, offset, n, page_size, space_id,
 		                         write_size);
 
 	if (type == OS_FILE_READ) {
@@ -5294,7 +5298,7 @@ os_aio_windows_handle(
 	}
 
 	if (slot->type == OS_FILE_WRITE) {
-		if (srv_use_trim && os_fallocate_failed == FALSE) {
+		if (!slot->is_log && srv_use_trim && os_fallocate_failed == FALSE) {
 			// Deallocate unused blocks from file system
 			os_file_trim(slot);
 		}
@@ -5390,7 +5394,7 @@ retry:
 			ut_a(slot->pos < end_pos);
 
 			if (slot->type == OS_FILE_WRITE) {
-				if (srv_use_trim && os_fallocate_failed == FALSE) {
+				if (!slot->is_log && srv_use_trim && os_fallocate_failed == FALSE) {
 					// Deallocate unused blocks from file system
 					os_file_trim(slot);
 				}
@@ -6305,19 +6309,13 @@ os_file_trim(
 	os_aio_slot_t*	slot) /*!< in: slot structure     */
 {
 	size_t len = slot->len;
-	size_t trim_len = UNIV_PAGE_SIZE - slot->len;
+	size_t trim_len = slot->page_size - slot->len;
 	os_offset_t off __attribute__((unused)) = slot->offset + len;
 	size_t bsize = slot->file_block_size;
 
-	// len here should be alligned to sector size
-	ut_ad((trim_len % bsize) == 0);
-	ut_ad((len % bsize) == 0);
-	ut_ad(bsize != 0);
-	ut_ad((off % bsize) == 0);
-
 #ifdef UNIV_TRIM_DEBUG
 	fprintf(stderr, "Note: TRIM: write_size %lu trim_len %lu len %lu off %lu bz %lu\n",
-		*slot->write_size, trim_len, len, off, bsize);
+		slot->write_size ? *slot->write_size : 0, trim_len, len, off, bsize);
 #endif
 
 	// Nothing to do if trim length is zero or if actual write
@@ -6332,22 +6330,19 @@ os_file_trim(
 		    *slot->write_size > 0 &&
 		    len >= *slot->write_size)) {
 
-#ifdef UNIV_PAGECOMPRESS_DEBUG
-		fprintf(stderr, "Note: TRIM: write_size %lu trim_len %lu len %lu\n",
-			*slot->write_size, trim_len, len);
-#endif
+		if (slot->write_size) {
+			if (*slot->write_size > 0 && len >= *slot->write_size) {
+				srv_stats.page_compressed_trim_op_saved.inc();
+			}
 
-		if (*slot->write_size > 0 && len >= *slot->write_size) {
-			srv_stats.page_compressed_trim_op_saved.inc();
+			*slot->write_size = len;
 		}
 
-		*slot->write_size = len;
-
 		return (TRUE);
 	}
 
 #ifdef __linux__
-#if defined(HAVE_FALLOCATE)
+#if defined(HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE)
 	int ret = fallocate(slot->file, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, off, trim_len);
 
 	if (ret) {
@@ -6385,7 +6380,7 @@ os_file_trim(
 		*slot->write_size = 0;
 	}
 
-#endif /* HAVE_FALLOCATE ... */
+#endif /* HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE ... */
 
 #elif defined(_WIN32)
 	FILE_LEVEL_TRIM flt;