diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/linux/linux-obdo.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/obdclass/linux/linux-obdo.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-obdo.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-obdo.c new file mode 100644 index 000000000000..6ee347153a16 --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-obdo.c @@ -0,0 +1,222 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program 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 version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 2011, 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/obdclass/linux/linux-obdo.c + * + * Object Devices Class Driver + * These are the only exported functions, they provide some generic + * infrastructure for managing object devices + */ + +#define DEBUG_SUBSYSTEM S_CLASS + +#include <linux/module.h> +#include <obd_class.h> +#include <lustre/lustre_idl.h> + +#include <linux/fs.h> +#include <linux/pagemap.h> /* for PAGE_CACHE_SIZE */ + +/*FIXME: Just copy from obdo_from_inode*/ +void obdo_from_la(struct obdo *dst, struct lu_attr *la, __u64 valid) +{ + obd_flag newvalid = 0; + + if (valid & LA_ATIME) { + dst->o_atime = la->la_atime; + newvalid |= OBD_MD_FLATIME; + } + if (valid & LA_MTIME) { + dst->o_mtime = la->la_mtime; + newvalid |= OBD_MD_FLMTIME; + } + if (valid & LA_CTIME) { + dst->o_ctime = la->la_ctime; + newvalid |= OBD_MD_FLCTIME; + } + if (valid & LA_SIZE) { + dst->o_size = la->la_size; + newvalid |= OBD_MD_FLSIZE; + } + if (valid & LA_BLOCKS) { /* allocation of space (x512 bytes) */ + dst->o_blocks = la->la_blocks; + newvalid |= OBD_MD_FLBLOCKS; + } + if (valid & LA_TYPE) { + dst->o_mode = (dst->o_mode & S_IALLUGO) | + (la->la_mode & S_IFMT); + newvalid |= OBD_MD_FLTYPE; + } + if (valid & LA_MODE) { + dst->o_mode = (dst->o_mode & S_IFMT) | + (la->la_mode & S_IALLUGO); + newvalid |= OBD_MD_FLMODE; + } + if (valid & LA_UID) { + dst->o_uid = la->la_uid; + newvalid |= OBD_MD_FLUID; + } + if (valid & LA_GID) { + dst->o_gid = la->la_gid; + newvalid |= OBD_MD_FLGID; + } + dst->o_valid |= newvalid; +} +EXPORT_SYMBOL(obdo_from_la); + +/*FIXME: Just copy from obdo_from_inode*/ +void la_from_obdo(struct lu_attr *dst, struct obdo *obdo, obd_flag valid) +{ + __u64 newvalid = 0; + + valid &= obdo->o_valid; + + if (valid & OBD_MD_FLATIME) { + dst->la_atime = obdo->o_atime; + newvalid |= LA_ATIME; + } + if (valid & OBD_MD_FLMTIME) { + dst->la_mtime = obdo->o_mtime; + newvalid |= LA_MTIME; + } + if (valid & OBD_MD_FLCTIME) { + dst->la_ctime = obdo->o_ctime; + newvalid |= LA_CTIME; + } + if (valid & OBD_MD_FLSIZE) { + dst->la_size = obdo->o_size; + newvalid |= LA_SIZE; + } + if (valid & OBD_MD_FLBLOCKS) { + dst->la_blocks = obdo->o_blocks; + newvalid |= LA_BLOCKS; + } + if (valid & OBD_MD_FLTYPE) { + dst->la_mode = (dst->la_mode & S_IALLUGO) | + (obdo->o_mode & S_IFMT); + newvalid |= LA_TYPE; + } + if (valid & OBD_MD_FLMODE) { + dst->la_mode = (dst->la_mode & S_IFMT) | + (obdo->o_mode & S_IALLUGO); + newvalid |= LA_MODE; + } + if (valid & OBD_MD_FLUID) { + dst->la_uid = obdo->o_uid; + newvalid |= LA_UID; + } + if (valid & OBD_MD_FLGID) { + dst->la_gid = obdo->o_gid; + newvalid |= LA_GID; + } + dst->la_valid = newvalid; +} +EXPORT_SYMBOL(la_from_obdo); + +void obdo_refresh_inode(struct inode *dst, struct obdo *src, obd_flag valid) +{ + valid &= src->o_valid; + + if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME)) + CDEBUG(D_INODE, + "valid "LPX64", cur time %lu/%lu, new "LPU64"/"LPU64"\n", + src->o_valid, LTIME_S(dst->i_mtime), + LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime); + + if (valid & OBD_MD_FLATIME && src->o_atime > LTIME_S(dst->i_atime)) + LTIME_S(dst->i_atime) = src->o_atime; + if (valid & OBD_MD_FLMTIME && src->o_mtime > LTIME_S(dst->i_mtime)) + LTIME_S(dst->i_mtime) = src->o_mtime; + if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime)) + LTIME_S(dst->i_ctime) = src->o_ctime; + if (valid & OBD_MD_FLSIZE) + i_size_write(dst, src->o_size); + /* optimum IO size */ + if (valid & OBD_MD_FLBLKSZ && src->o_blksize > (1 << dst->i_blkbits)) + dst->i_blkbits = ffs(src->o_blksize) - 1; + + if (dst->i_blkbits < PAGE_CACHE_SHIFT) + dst->i_blkbits = PAGE_CACHE_SHIFT; + + /* allocation of space */ + if (valid & OBD_MD_FLBLOCKS && src->o_blocks > dst->i_blocks) + /* + * XXX shouldn't overflow be checked here like in + * obdo_to_inode(). + */ + dst->i_blocks = src->o_blocks; +} +EXPORT_SYMBOL(obdo_refresh_inode); + +void obdo_to_inode(struct inode *dst, struct obdo *src, obd_flag valid) +{ + valid &= src->o_valid; + + LASSERTF(!(valid & (OBD_MD_FLTYPE | OBD_MD_FLGENER | OBD_MD_FLFID | + OBD_MD_FLID | OBD_MD_FLGROUP)), + "object "DOSTID", valid %x\n", POSTID(&src->o_oi), valid); + + if (valid & (OBD_MD_FLCTIME | OBD_MD_FLMTIME)) + CDEBUG(D_INODE, + "valid "LPX64", cur time %lu/%lu, new "LPU64"/"LPU64"\n", + src->o_valid, LTIME_S(dst->i_mtime), + LTIME_S(dst->i_ctime), src->o_mtime, src->o_ctime); + + if (valid & OBD_MD_FLATIME) + LTIME_S(dst->i_atime) = src->o_atime; + if (valid & OBD_MD_FLMTIME) + LTIME_S(dst->i_mtime) = src->o_mtime; + if (valid & OBD_MD_FLCTIME && src->o_ctime > LTIME_S(dst->i_ctime)) + LTIME_S(dst->i_ctime) = src->o_ctime; + if (valid & OBD_MD_FLSIZE) + i_size_write(dst, src->o_size); + if (valid & OBD_MD_FLBLOCKS) { /* allocation of space */ + dst->i_blocks = src->o_blocks; + if (dst->i_blocks < src->o_blocks) /* overflow */ + dst->i_blocks = -1; + + } + if (valid & OBD_MD_FLBLKSZ) + dst->i_blkbits = ffs(src->o_blksize)-1; + if (valid & OBD_MD_FLMODE) + dst->i_mode = (dst->i_mode & S_IFMT) | (src->o_mode & ~S_IFMT); + if (valid & OBD_MD_FLUID) + dst->i_uid = src->o_uid; + if (valid & OBD_MD_FLGID) + dst->i_gid = src->o_gid; + if (valid & OBD_MD_FLFLAGS) + dst->i_flags = src->o_flags; +} +EXPORT_SYMBOL(obdo_to_inode); |