diff --git a/config/kernel-blkdev.m4 b/config/kernel-blkdev.m4 index c5a353ca9..dae7bef9c 100644 --- a/config/kernel-blkdev.m4 +++ b/config/kernel-blkdev.m4 @@ -523,12 +523,29 @@ AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEVNAME], [ ]) dnl # -dnl # 5.19 API: blkdev_issue_secure_erase() -dnl # 4.7 API: __blkdev_issue_discard(..., BLKDEV_DISCARD_SECURE) -dnl # 3.10 API: blkdev_issue_discard(..., BLKDEV_DISCARD_SECURE) +dnl # TRIM support: discard and secure erase. We make use of asynchronous +dnl # functions when available. dnl # -AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_SECURE_ERASE], [ - ZFS_LINUX_TEST_SRC([blkdev_issue_secure_erase], [ +dnl # 3.10: +dnl # sync discard: blkdev_issue_discard(..., 0) +dnl # sync erase: blkdev_issue_discard(..., BLKDEV_DISCARD_SECURE) +dnl # async discard: [not available] +dnl # async erase: [not available] +dnl # +dnl # 4.7: +dnl # sync discard: blkdev_issue_discard(..., 0) +dnl # sync erase: blkdev_issue_discard(..., BLKDEV_DISCARD_SECURE) +dnl # async discard: __blkdev_issue_discard(..., 0) +dnl # async erase: __blkdev_issue_discard(..., BLKDEV_DISCARD_SECURE) +dnl # +dnl # 5.19: +dnl # sync discard: blkdev_issue_discard(...) +dnl # sync erase: blkdev_issue_secure_erase(...) +dnl # async discard: __blkdev_issue_discard(...) +dnl # async erase: [not available] +dnl # +AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_DISCARD], [ + ZFS_LINUX_TEST_SRC([blkdev_issue_discard_noflags], [ #include ],[ struct block_device *bdev = NULL; @@ -536,10 +553,33 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_SECURE_ERASE], [ sector_t nr_sects = 0; int error __attribute__ ((unused)); - error = blkdev_issue_secure_erase(bdev, + error = blkdev_issue_discard(bdev, sector, nr_sects, GFP_KERNEL); ]) + ZFS_LINUX_TEST_SRC([blkdev_issue_discard_flags], [ + #include + ],[ + struct block_device *bdev = NULL; + sector_t sector = 0; + sector_t nr_sects = 0; + unsigned long flags = 0; + int error __attribute__ ((unused)); + error = blkdev_issue_discard(bdev, + sector, nr_sects, GFP_KERNEL, flags); + ]) + ZFS_LINUX_TEST_SRC([blkdev_issue_discard_async_noflags], [ + #include + ],[ + struct block_device *bdev = NULL; + sector_t sector = 0; + sector_t nr_sects = 0; + struct bio *biop = NULL; + int error __attribute__ ((unused)); + + error = __blkdev_issue_discard(bdev, + sector, nr_sects, GFP_KERNEL, &biop); + ]) ZFS_LINUX_TEST_SRC([blkdev_issue_discard_async_flags], [ #include ],[ @@ -553,22 +593,52 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_SECURE_ERASE], [ error = __blkdev_issue_discard(bdev, sector, nr_sects, GFP_KERNEL, flags, &biop); ]) - - ZFS_LINUX_TEST_SRC([blkdev_issue_discard_flags], [ + ZFS_LINUX_TEST_SRC([blkdev_issue_secure_erase], [ #include ],[ struct block_device *bdev = NULL; sector_t sector = 0; sector_t nr_sects = 0; - unsigned long flags = 0; int error __attribute__ ((unused)); - error = blkdev_issue_discard(bdev, - sector, nr_sects, GFP_KERNEL, flags); + error = blkdev_issue_secure_erase(bdev, + sector, nr_sects, GFP_KERNEL); ]) ]) -AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_ISSUE_SECURE_ERASE], [ +AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_ISSUE_DISCARD], [ + AC_MSG_CHECKING([whether blkdev_issue_discard() is available]) + ZFS_LINUX_TEST_RESULT([blkdev_issue_discard_noflags], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BLKDEV_ISSUE_DISCARD_NOFLAGS, 1, + [blkdev_issue_discard() is available]) + ],[ + AC_MSG_RESULT(no) + ]) + AC_MSG_CHECKING([whether blkdev_issue_discard(flags) is available]) + ZFS_LINUX_TEST_RESULT([blkdev_issue_discard_flags], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BLKDEV_ISSUE_DISCARD_FLAGS, 1, + [blkdev_issue_discard(flags) is available]) + ],[ + AC_MSG_RESULT(no) + ]) + AC_MSG_CHECKING([whether __blkdev_issue_discard() is available]) + ZFS_LINUX_TEST_RESULT([blkdev_issue_discard_async_noflags], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BLKDEV_ISSUE_DISCARD_ASYNC_NOFLAGS, 1, + [__blkdev_issue_discard() is available]) + ],[ + AC_MSG_RESULT(no) + ]) + AC_MSG_CHECKING([whether __blkdev_issue_discard(flags) is available]) + ZFS_LINUX_TEST_RESULT([blkdev_issue_discard_async_flags], [ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_BLKDEV_ISSUE_DISCARD_ASYNC_FLAGS, 1, + [__blkdev_issue_discard(flags) is available]) + ],[ + AC_MSG_RESULT(no) + ]) AC_MSG_CHECKING([whether blkdev_issue_secure_erase() is available]) ZFS_LINUX_TEST_RESULT([blkdev_issue_secure_erase], [ AC_MSG_RESULT(yes) @@ -576,24 +646,6 @@ AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_ISSUE_SECURE_ERASE], [ [blkdev_issue_secure_erase() is available]) ],[ AC_MSG_RESULT(no) - - AC_MSG_CHECKING([whether __blkdev_issue_discard() is available]) - ZFS_LINUX_TEST_RESULT([blkdev_issue_discard_async_flags], [ - AC_MSG_RESULT(yes) - AC_DEFINE(HAVE_BLKDEV_ISSUE_DISCARD_ASYNC, 1, - [__blkdev_issue_discard() is available]) - ],[ - AC_MSG_RESULT(no) - - AC_MSG_CHECKING([whether blkdev_issue_discard() is available]) - ZFS_LINUX_TEST_RESULT([blkdev_issue_discard_flags], [ - AC_MSG_RESULT(yes) - AC_DEFINE(HAVE_BLKDEV_ISSUE_DISCARD, 1, - [blkdev_issue_discard() is available]) - ],[ - ZFS_LINUX_TEST_ERROR([blkdev_issue_discard()]) - ]) - ]) ]) ]) @@ -657,7 +709,7 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV], [ ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_CHECK_MEDIA_CHANGE ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_WHOLE ZFS_AC_KERNEL_SRC_BLKDEV_BDEVNAME - ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_SECURE_ERASE + ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_DISCARD ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_KOBJ ZFS_AC_KERNEL_SRC_BLKDEV_PART_TO_DEV ZFS_AC_KERNEL_SRC_BLKDEV_DISK_CHECK_MEDIA_CHANGE @@ -678,7 +730,7 @@ AC_DEFUN([ZFS_AC_KERNEL_BLKDEV], [ ZFS_AC_KERNEL_BLKDEV_BDEV_WHOLE ZFS_AC_KERNEL_BLKDEV_BDEVNAME ZFS_AC_KERNEL_BLKDEV_GET_ERESTARTSYS - ZFS_AC_KERNEL_BLKDEV_ISSUE_SECURE_ERASE + ZFS_AC_KERNEL_BLKDEV_ISSUE_DISCARD ZFS_AC_KERNEL_BLKDEV_BDEV_KOBJ ZFS_AC_KERNEL_BLKDEV_PART_TO_DEV ZFS_AC_KERNEL_BLKDEV_DISK_CHECK_MEDIA_CHANGE diff --git a/module/os/linux/zfs/vdev_disk.c b/module/os/linux/zfs/vdev_disk.c index 62c7aa14f..12157d3b6 100644 --- a/module/os/linux/zfs/vdev_disk.c +++ b/module/os/linux/zfs/vdev_disk.c @@ -1243,8 +1243,6 @@ vdev_disk_io_flush(struct block_device *bdev, zio_t *zio) return (0); } -#if defined(HAVE_BLKDEV_ISSUE_SECURE_ERASE) || \ - defined(HAVE_BLKDEV_ISSUE_DISCARD_ASYNC) BIO_END_IO_PROTO(vdev_disk_discard_end_io, bio, error) { zio_t *zio = bio->bi_private; @@ -1259,54 +1257,99 @@ BIO_END_IO_PROTO(vdev_disk_discard_end_io, bio, error) zio_interrupt(zio); } +/* + * Wrappers for the different secure erase and discard APIs. We use async + * when available; in this case, *biop is set to the last bio in the chain. + */ static int -vdev_issue_discard_trim(zio_t *zio, unsigned long flags) +vdev_bdev_issue_secure_erase(zfs_bdev_handle_t *bdh, sector_t sector, + sector_t nsect, struct bio **biop) { - int ret; - struct bio *bio = NULL; + *biop = NULL; + int error; -#if defined(BLKDEV_DISCARD_SECURE) - ret = - __blkdev_issue_discard( - BDH_BDEV(((vdev_disk_t *)zio->io_vd->vdev_tsd)->vd_bdh), - zio->io_offset >> 9, zio->io_size >> 9, GFP_NOFS, flags, &bio); +#if defined(HAVE_BLKDEV_ISSUE_SECURE_ERASE) + error = blkdev_issue_secure_erase(BDH_BDEV(bdh), + sector, nsect, GFP_NOFS); +#elif defined(HAVE_BLKDEV_ISSUE_DISCARD_ASYNC_FLAGS) + error = __blkdev_issue_discard(BDH_BDEV(bdh), + sector, nsect, GFP_NOFS, BLKDEV_DISCARD_SECURE, biop); +#elif defined(HAVE_BLKDEV_ISSUE_DISCARD_FLAGS) + error = blkdev_issue_discard(BDH_BDEV(bdh), + sector, nsect, GFP_NOFS, BLKDEV_DISCARD_SECURE); #else - (void) flags; - ret = - __blkdev_issue_discard( - BDH_BDEV(((vdev_disk_t *)zio->io_vd->vdev_tsd)->vd_bdh), - zio->io_offset >> 9, zio->io_size >> 9, GFP_NOFS, &bio); +#error "unsupported kernel" #endif - if (!ret && bio) { + + return (error); +} + +static int +vdev_bdev_issue_discard(zfs_bdev_handle_t *bdh, sector_t sector, + sector_t nsect, struct bio **biop) +{ + *biop = NULL; + int error; + +#if defined(HAVE_BLKDEV_ISSUE_DISCARD_ASYNC_FLAGS) + error = __blkdev_issue_discard(BDH_BDEV(bdh), + sector, nsect, GFP_NOFS, 0, biop); +#elif defined(HAVE_BLKDEV_ISSUE_DISCARD_ASYNC_NOFLAGS) + error = __blkdev_issue_discard(BDH_BDEV(bdh), + sector, nsect, GFP_NOFS, biop); +#elif defined(HAVE_BLKDEV_ISSUE_DISCARD_FLAGS) + error = blkdev_issue_discard(BDH_BDEV(bdh), + sector, nsect, GFP_NOFS, 0); +#elif defined(HAVE_BLKDEV_ISSUE_DISCARD_NOFLAGS) + error = blkdev_issue_discard(BDH_BDEV(bdh), + sector, nsect, GFP_NOFS); +#else +#error "unsupported kernel" +#endif + + return (error); +} + +/* + * Entry point for TRIM ops. This calls the right wrapper for secure erase or + * discard, and then does the appropriate finishing work for error vs success + * and async vs sync. + */ +static int +vdev_disk_io_trim(zio_t *zio) +{ + int error; + struct bio *bio; + + zfs_bdev_handle_t *bdh = ((vdev_disk_t *)zio->io_vd->vdev_tsd)->vd_bdh; + sector_t sector = zio->io_offset >> 9; + sector_t nsects = zio->io_size >> 9; + + if (zio->io_trim_flags & ZIO_TRIM_SECURE) + error = vdev_bdev_issue_secure_erase(bdh, sector, nsects, &bio); + else + error = vdev_bdev_issue_discard(bdh, sector, nsects, &bio); + + if (error != 0) + return (SET_ERROR(-error)); + + if (bio == NULL) { + /* + * This was a synchronous op that completed successfully, so + * return it to ZFS immediately. + */ + zio_interrupt(zio); + } else { + /* + * This was an asynchronous op; set up completion callback and + * issue it. + */ bio->bi_private = zio; bio->bi_end_io = vdev_disk_discard_end_io; vdev_submit_bio(bio); } - return (ret); -} -#endif -static int -vdev_disk_io_trim(zio_t *zio) -{ - unsigned long trim_flags = 0; - if (zio->io_trim_flags & ZIO_TRIM_SECURE) { -#if defined(HAVE_BLKDEV_ISSUE_SECURE_ERASE) - return (-blkdev_issue_secure_erase( - BDH_BDEV(((vdev_disk_t *)zio->io_vd->vdev_tsd)->vd_bdh), - zio->io_offset >> 9, zio->io_size >> 9, GFP_NOFS)); -#elif defined(BLKDEV_DISCARD_SECURE) - trim_flags |= BLKDEV_DISCARD_SECURE; -#endif - } -#if defined(HAVE_BLKDEV_ISSUE_SECURE_ERASE) || \ - defined(HAVE_BLKDEV_ISSUE_DISCARD_ASYNC) - return (vdev_issue_discard_trim(zio, trim_flags)); -#elif defined(HAVE_BLKDEV_ISSUE_DISCARD) - return (-blkdev_issue_discard( - BDH_BDEV(((vdev_disk_t *)zio->io_vd->vdev_tsd)->vd_bdh), - zio->io_offset >> 9, zio->io_size >> 9, GFP_NOFS, trim_flags)); -#else -#error "Unsupported kernel" -#endif + return (0); } int (*vdev_disk_io_rw_fn)(zio_t *zio) = NULL; @@ -1381,14 +1424,12 @@ vdev_disk_io_start(zio_t *zio) return; case ZIO_TYPE_TRIM: - zio->io_error = vdev_disk_io_trim(zio); + error = vdev_disk_io_trim(zio); rw_exit(&vd->vd_lock); -#if defined(HAVE_BLKDEV_ISSUE_SECURE_ERASE) - if (zio->io_trim_flags & ZIO_TRIM_SECURE) - zio_interrupt(zio); -#elif defined(HAVE_BLKDEV_ISSUE_DISCARD) - zio_interrupt(zio); -#endif + if (error) { + zio->io_error = error; + zio_execute(zio); + } return; case ZIO_TYPE_READ: