From e5f9a9afd27ce78ee9c08c24f63ad48dfc9ea8de Mon Sep 17 00:00:00 2001 From: Tim Chase Date: Fri, 24 Jul 2015 15:36:59 -0500 Subject: [PATCH] Additional dkio support for TRIM/Discard Replace DKIOCTRIM with DKIOCFREE and add additional support required for Nextenta's TRIM support. Signed-off-by: Tim Chase Signed-off-by: Brian Behlendorf Closes #469 --- include/sys/Makefile.am | 1 + include/sys/dkio.h | 18 ++++++------ include/sys/dkioc_free_util.h | 54 +++++++++++++++++++++++++++++++++++ 3 files changed, 65 insertions(+), 8 deletions(-) create mode 100644 include/sys/dkioc_free_util.h diff --git a/include/sys/Makefile.am b/include/sys/Makefile.am index 73c4a8421..a16bd6ce6 100644 --- a/include/sys/Makefile.am +++ b/include/sys/Makefile.am @@ -29,6 +29,7 @@ KERNEL_H = \ $(top_srcdir)/include/sys/dirent.h \ $(top_srcdir)/include/sys/disp.h \ $(top_srcdir)/include/sys/dkio.h \ + $(top_srcdir)/include/sys/dkioc_free_util.h \ $(top_srcdir)/include/sys/dklabel.h \ $(top_srcdir)/include/sys/dnlc.h \ $(top_srcdir)/include/sys/dumphdr.h \ diff --git a/include/sys/dkio.h b/include/sys/dkio.h index d8c700718..dd7a95f13 100644 --- a/include/sys/dkio.h +++ b/include/sys/dkio.h @@ -25,14 +25,16 @@ #ifndef _SPL_DKIO_H #define _SPL_DKIO_H -struct dk_callback { - void (*dkc_callback)(void *dkc_cookie, int error); - void *dkc_cookie; - int dkc_flag; -}; +#define DFL_SZ(num_exts) \ + (sizeof (dkioc_free_list_t) + (num_exts - 1) * 16) -#define DKIOC (0x04 << 8) -#define DKIOCFLUSHWRITECACHE (DKIOC | 34) -#define DKIOCTRIM (DKIOC | 35) +#define DKIOC (0x04 << 8) +#define DKIOCFLUSHWRITECACHE (DKIOC|34) /* flush cache to phys medium */ + +/* + * ioctl to free space (e.g. SCSI UNMAP) off a disk. + * Pass a dkioc_free_list_t containing a list of extents to be freed. + */ +#define DKIOCFREE (DKIOC|50) #endif /* _SPL_DKIO_H */ diff --git a/include/sys/dkioc_free_util.h b/include/sys/dkioc_free_util.h new file mode 100644 index 000000000..a424d4232 --- /dev/null +++ b/include/sys/dkioc_free_util.h @@ -0,0 +1,54 @@ +/*****************************************************************************\ + * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. + * Copyright (C) 2007 The Regents of the University of California. + * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). + * Written by Brian Behlendorf . + * UCRL-CODE-235197 + * + * This file is part of the SPL, Solaris Porting Layer. + * For details, see . + * + * The SPL is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * The SPL is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with the SPL. If not, see . +\*****************************************************************************/ + +#ifndef _SPL_DKIOC_UTIL_H +#define _SPL_DKIOC_UTIL_H + +#include + +typedef struct dkioc_free_list_ext_s { + uint64_t dfle_start; + uint64_t dfle_length; +} dkioc_free_list_ext_t; + +typedef struct dkioc_free_list_s { + uint64_t dfl_flags; + uint64_t dfl_num_exts; + int64_t dfl_offset; + + /* + * N.B. this is only an internal debugging API! This is only called + * from debug builds of sd for pre-release checking. Remove before GA! + */ + void (*dfl_ck_func)(uint64_t, uint64_t, void *); + void *dfl_ck_arg; + + dkioc_free_list_ext_t dfl_exts[1]; +} dkioc_free_list_t; + +static inline void dfl_free(dkioc_free_list_t *dfl) { + kmem_free(dfl, DFL_SZ(dfl->dfl_num_exts)); +} + +#endif /* _SPL_DKIOC_UTIL_H */