From 59b3256e551eb278d99a281cb68d4638dcfefe4d Mon Sep 17 00:00:00 2001 From: Rob Norris Date: Sun, 1 Sep 2024 12:31:56 +1000 Subject: [PATCH] zfs_file: rename zfs_file_fallocate to zfs_file_deallocate We only use it on a specific way: to punch a hole in (make sparse) a region of a file, in order to implement TRIM-like behaviour. So, call the op "deallocate", and move the Linux-style mode flags down into the Linux implementation, since they're an implementation detail. FreeBSD gets a no-op stub (for the moment). Sponsored-by: https://despairlabs.com/sponsor/ Reviewed by: Brian Behlendorf Reviewed-by: Alexander Motin Reviewed-by: Tino Reichardt Signed-off-by: Rob Norris Closes #16496 --- include/sys/zfs_file.h | 2 +- lib/libzpool/kernel.c | 24 +++++++++++++----------- module/os/freebsd/zfs/vdev_file.c | 11 ++--------- module/os/freebsd/zfs/zfs_file_os.c | 14 ++++++++++++++ module/os/linux/zfs/vdev_file.c | 9 ++------- module/os/linux/zfs/zfs_file_os.c | 19 ++++++++++--------- 6 files changed, 42 insertions(+), 37 deletions(-) diff --git a/include/sys/zfs_file.h b/include/sys/zfs_file.h index e944165adc40..64f116c21ba7 100644 --- a/include/sys/zfs_file.h +++ b/include/sys/zfs_file.h @@ -53,7 +53,7 @@ int zfs_file_pread(zfs_file_t *fp, void *buf, size_t len, loff_t off, int zfs_file_seek(zfs_file_t *fp, loff_t *offp, int whence); int zfs_file_getattr(zfs_file_t *fp, zfs_file_attr_t *zfattr); int zfs_file_fsync(zfs_file_t *fp, int flags); -int zfs_file_fallocate(zfs_file_t *fp, int mode, loff_t offset, loff_t len); +int zfs_file_deallocate(zfs_file_t *fp, loff_t offset, loff_t len); loff_t zfs_file_off(zfs_file_t *fp); int zfs_file_unlink(const char *); diff --git a/lib/libzpool/kernel.c b/lib/libzpool/kernel.c index ffad7fc02bc9..a02bee72b8df 100644 --- a/lib/libzpool/kernel.c +++ b/lib/libzpool/kernel.c @@ -1364,24 +1364,26 @@ zfs_file_fsync(zfs_file_t *fp, int flags) } /* - * fallocate - allocate or free space on disk + * deallocate - zero and/or deallocate file storage * * fp - file pointer - * mode (non-standard options for hole punching etc) - * offset - offset to start allocating or freeing from - * len - length to free / allocate - * - * OPTIONAL + * offset - offset to start zeroing or deallocating + * len - length to zero or deallocate */ int -zfs_file_fallocate(zfs_file_t *fp, int mode, loff_t offset, loff_t len) +zfs_file_deallocate(zfs_file_t *fp, loff_t offset, loff_t len) { -#ifdef __linux__ - return (fallocate(fp->f_fd, mode, offset, len)); + int rc; +#if defined(__linux__) + rc = fallocate(fp->f_fd, + FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, offset, len); #else - (void) fp, (void) mode, (void) offset, (void) len; - return (EOPNOTSUPP); + (void) fp, (void) offset, (void) len; + rc = EOPNOTSUPP; #endif + if (rc) + return (SET_ERROR(rc)); + return (0); } /* diff --git a/module/os/freebsd/zfs/vdev_file.c b/module/os/freebsd/zfs/vdev_file.c index a65dfec86caf..73e1cce058ea 100644 --- a/module/os/freebsd/zfs/vdev_file.c +++ b/module/os/freebsd/zfs/vdev_file.c @@ -267,16 +267,9 @@ vdev_file_io_start(zio_t *zio) zio_execute(zio); return; } else if (zio->io_type == ZIO_TYPE_TRIM) { -#ifdef notyet - int mode = 0; - ASSERT3U(zio->io_size, !=, 0); - - /* XXX FreeBSD has no fallocate routine in file ops */ - zio->io_error = zfs_file_fallocate(vf->vf_file, - mode, zio->io_offset, zio->io_size); -#endif - zio->io_error = SET_ERROR(ENOTSUP); + zio->io_error = zfs_file_deallocate(vf->vf_file, + zio->io_offset, zio->io_size); zio_execute(zio); return; } diff --git a/module/os/freebsd/zfs/zfs_file_os.c b/module/os/freebsd/zfs/zfs_file_os.c index f7f2be2cf95a..77fedf7c36b6 100644 --- a/module/os/freebsd/zfs/zfs_file_os.c +++ b/module/os/freebsd/zfs/zfs_file_os.c @@ -288,6 +288,20 @@ zfs_file_fsync(zfs_file_t *fp, int flags) return (zfs_vop_fsync(fp->f_vnode)); } +/* + * deallocate - zero and/or deallocate file storage + * + * fp - file pointer + * offset - offset to start zeroing or deallocating + * len - length to zero or deallocate + */ +int +zfs_file_deallocate(zfs_file_t *fp, loff_t offset, loff_t len) +{ + (void) fp, (void) offset, (void) len; + return (SET_ERROR(EOPNOTSUPP)); +} + zfs_file_t * zfs_file_get(int fd) { diff --git a/module/os/linux/zfs/vdev_file.c b/module/os/linux/zfs/vdev_file.c index 5abc0426d1a7..6d5841a2f0c9 100644 --- a/module/os/linux/zfs/vdev_file.c +++ b/module/os/linux/zfs/vdev_file.c @@ -280,14 +280,9 @@ vdev_file_io_start(zio_t *zio) zio_execute(zio); return; } else if (zio->io_type == ZIO_TYPE_TRIM) { - int mode = 0; - ASSERT3U(zio->io_size, !=, 0); -#ifdef __linux__ - mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; -#endif - zio->io_error = zfs_file_fallocate(vf->vf_file, - mode, zio->io_offset, zio->io_size); + zio->io_error = zfs_file_deallocate(vf->vf_file, + zio->io_offset, zio->io_size); zio_execute(zio); return; } diff --git a/module/os/linux/zfs/zfs_file_os.c b/module/os/linux/zfs/zfs_file_os.c index 1b52dbe4f365..4acdc6a4156a 100644 --- a/module/os/linux/zfs/zfs_file_os.c +++ b/module/os/linux/zfs/zfs_file_os.c @@ -281,17 +281,14 @@ zfs_file_fsync(zfs_file_t *filp, int flags) } /* - * fallocate - allocate or free space on disk + * deallocate - zero and/or deallocate file storage * * fp - file pointer - * mode (non-standard options for hole punching etc) - * offset - offset to start allocating or freeing from - * len - length to free / allocate - * - * OPTIONAL + * offset - offset to start zeroing or deallocating + * len - length to zero or deallocate */ int -zfs_file_fallocate(zfs_file_t *fp, int mode, loff_t offset, loff_t len) +zfs_file_deallocate(zfs_file_t *fp, loff_t offset, loff_t len) { /* * May enter XFS which generates a warning when PF_FSTRANS is set. @@ -307,12 +304,16 @@ zfs_file_fallocate(zfs_file_t *fp, int mode, loff_t offset, loff_t len) */ int error = EOPNOTSUPP; if (fp->f_op->fallocate) - error = fp->f_op->fallocate(fp, mode, offset, len); + error = -fp->f_op->fallocate(fp, + FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, offset, len); if (fstrans) current->flags |= __SPL_PF_FSTRANS; - return (error); + if (error) + return (SET_ERROR(error)); + + return (0); } /*