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d1d7e2689d
The vast majority of these changes are in Linux specific code. They are the result of not having an automated style checker to validate the code when it was originally written. Others were caused when the common code was slightly adjusted for Linux. This patch contains no functional changes. It only refreshes the code to conform to style guide. Everyone submitting patches for inclusion upstream should now run 'make checkstyle' and resolve any warning prior to opening a pull request. The automated builders have been updated to fail a build if when 'make checkstyle' detects an issue. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #1821
328 lines
8.2 KiB
C
328 lines
8.2 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (C) 2011 Lawrence Livermore National Security, LLC.
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*/
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#ifndef _ZFS_VFS_H
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#define _ZFS_VFS_H
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/*
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* 2.6.28 API change,
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* Added insert_inode_locked() helper function, prior to this most callers
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* used insert_inode_hash(). The older method doesn't check for collisions
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* in the inode_hashtable but it still acceptible for use.
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*/
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#ifndef HAVE_INSERT_INODE_LOCKED
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static inline int
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insert_inode_locked(struct inode *ip)
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{
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insert_inode_hash(ip);
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return (0);
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}
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#endif /* HAVE_INSERT_INODE_LOCKED */
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/*
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* 2.6.35 API change,
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* Add truncate_setsize() if it is not exported by the Linux kernel.
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*
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* Truncate the inode and pages associated with the inode. The pages are
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* unmapped and removed from cache.
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*/
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#ifndef HAVE_TRUNCATE_SETSIZE
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static inline void
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truncate_setsize(struct inode *ip, loff_t new)
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{
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struct address_space *mapping = ip->i_mapping;
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i_size_write(ip, new);
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unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
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truncate_inode_pages(mapping, new);
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unmap_mapping_range(mapping, new + PAGE_SIZE - 1, 0, 1);
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}
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#endif /* HAVE_TRUNCATE_SETSIZE */
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#if defined(HAVE_BDI) && !defined(HAVE_BDI_SETUP_AND_REGISTER)
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/*
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* 2.6.34 API change,
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* Add bdi_setup_and_register() function if not yet provided by kernel.
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* It is used to quickly initialize and register a BDI for the filesystem.
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*/
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extern atomic_long_t zfs_bdi_seq;
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static inline int
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bdi_setup_and_register(
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struct backing_dev_info *bdi,
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char *name,
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unsigned int cap)
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{
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char tmp[32];
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int error;
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bdi->name = name;
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bdi->capabilities = cap;
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error = bdi_init(bdi);
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if (error)
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return (error);
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sprintf(tmp, "%.28s%s", name, "-%d");
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error = bdi_register(bdi, NULL, tmp,
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atomic_long_inc_return(&zfs_bdi_seq));
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if (error) {
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bdi_destroy(bdi);
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return (error);
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}
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return (error);
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}
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#endif /* HAVE_BDI && !HAVE_BDI_SETUP_AND_REGISTER */
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/*
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* 2.6.38 API change,
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* LOOKUP_RCU flag introduced to distinguish rcu-walk from ref-walk cases.
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*/
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#ifndef LOOKUP_RCU
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#define LOOKUP_RCU 0x0
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#endif /* LOOKUP_RCU */
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/*
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* 3.2-rc1 API change,
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* Add set_nlink() if it is not exported by the Linux kernel.
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*
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* i_nlink is read-only in Linux 3.2, but it can be set directly in
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* earlier kernels.
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*/
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#ifndef HAVE_SET_NLINK
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static inline void
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set_nlink(struct inode *inode, unsigned int nlink)
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{
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inode->i_nlink = nlink;
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}
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#endif /* HAVE_SET_NLINK */
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/*
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* 3.3 API change,
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* The VFS .create, .mkdir and .mknod callbacks were updated to take a
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* umode_t type rather than an int. To cleanly handle both definitions
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* the zpl_umode_t type is introduced and set accordingly.
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*/
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#ifdef HAVE_MKDIR_UMODE_T
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typedef umode_t zpl_umode_t;
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#else
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typedef int zpl_umode_t;
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#endif
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/*
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* 3.5 API change,
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* The clear_inode() function replaces end_writeback() and introduces an
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* ordering change regarding when the inode_sync_wait() occurs. See the
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* configure check in config/kernel-clear-inode.m4 for full details.
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*/
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#if defined(HAVE_EVICT_INODE) && !defined(HAVE_CLEAR_INODE)
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#define clear_inode(ip) end_writeback(ip)
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#endif /* HAVE_EVICT_INODE && !HAVE_CLEAR_INODE */
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/*
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* 3.6 API change,
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* The sget() helper function now takes the mount flags as an argument.
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*/
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#ifdef HAVE_5ARG_SGET
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#define zpl_sget(type, cmp, set, fl, mtd) sget(type, cmp, set, fl, mtd)
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#else
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#define zpl_sget(type, cmp, set, fl, mtd) sget(type, cmp, set, mtd)
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#endif /* HAVE_5ARG_SGET */
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#define ZFS_IOC_GETFLAGS FS_IOC_GETFLAGS
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#define ZFS_IOC_SETFLAGS FS_IOC_SETFLAGS
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#if defined(SEEK_HOLE) && defined(SEEK_DATA) && !defined(HAVE_LSEEK_EXECUTE)
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static inline loff_t
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lseek_execute(
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struct file *filp,
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struct inode *inode,
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loff_t offset,
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loff_t maxsize)
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{
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if (offset < 0 && !(filp->f_mode & FMODE_UNSIGNED_OFFSET))
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return (-EINVAL);
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if (offset > maxsize)
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return (-EINVAL);
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if (offset != filp->f_pos) {
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spin_lock(&filp->f_lock);
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filp->f_pos = offset;
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filp->f_version = 0;
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spin_unlock(&filp->f_lock);
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}
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return (offset);
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}
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#endif /* SEEK_HOLE && SEEK_DATA && !HAVE_LSEEK_EXECUTE */
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#if defined(CONFIG_FS_POSIX_ACL)
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/*
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* These functions safely approximates the behavior of posix_acl_release()
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* which cannot be used because it calls the GPL-only symbol kfree_rcu().
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* The in-kernel version, which can access the RCU, frees the ACLs after
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* the grace period expires. Because we're unsure how long that grace
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* period may be this implementation conservatively delays for 60 seconds.
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* This is several orders of magnitude larger than expected grace period.
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* At 60 seconds the kernel will also begin issuing RCU stall warnings.
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*/
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#include <linux/posix_acl.h>
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#ifndef HAVE_POSIX_ACL_CACHING
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#define ACL_NOT_CACHED ((void *)(-1))
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#endif /* HAVE_POSIX_ACL_CACHING */
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#if defined(HAVE_POSIX_ACL_RELEASE) && !defined(HAVE_POSIX_ACL_RELEASE_GPL_ONLY)
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#define zpl_posix_acl_release(arg) posix_acl_release(arg)
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#define zpl_set_cached_acl(ip, ty, n) set_cached_acl(ip, ty, n)
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#define zpl_forget_cached_acl(ip, ty) forget_cached_acl(ip, ty)
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#else
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static inline void
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zpl_posix_acl_free(void *arg) {
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kfree(arg);
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}
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static inline void
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zpl_posix_acl_release(struct posix_acl *acl)
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{
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if ((acl == NULL) || (acl == ACL_NOT_CACHED))
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return;
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if (atomic_dec_and_test(&acl->a_refcount)) {
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taskq_dispatch_delay(system_taskq, zpl_posix_acl_free, acl,
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TQ_SLEEP, ddi_get_lbolt() + 60*HZ);
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}
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}
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static inline void
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zpl_set_cached_acl(struct inode *ip, int type, struct posix_acl *newer) {
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#ifdef HAVE_POSIX_ACL_CACHING
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struct posix_acl *older = NULL;
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spin_lock(&ip->i_lock);
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if ((newer != ACL_NOT_CACHED) && (newer != NULL))
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posix_acl_dup(newer);
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switch (type) {
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case ACL_TYPE_ACCESS:
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older = ip->i_acl;
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rcu_assign_pointer(ip->i_acl, newer);
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break;
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case ACL_TYPE_DEFAULT:
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older = ip->i_default_acl;
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rcu_assign_pointer(ip->i_default_acl, newer);
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break;
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}
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spin_unlock(&ip->i_lock);
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zpl_posix_acl_release(older);
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#endif /* HAVE_POSIX_ACL_CACHING */
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}
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static inline void
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zpl_forget_cached_acl(struct inode *ip, int type) {
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zpl_set_cached_acl(ip, type, (struct posix_acl *)ACL_NOT_CACHED);
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}
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#endif /* HAVE_POSIX_ACL_RELEASE */
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/*
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* 2.6.38 API change,
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* The is_owner_or_cap() function was renamed to inode_owner_or_capable().
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*/
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#ifdef HAVE_INODE_OWNER_OR_CAPABLE
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#define zpl_inode_owner_or_capable(ip) inode_owner_or_capable(ip)
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#else
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#define zpl_inode_owner_or_capable(ip) is_owner_or_cap(ip)
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#endif /* HAVE_INODE_OWNER_OR_CAPABLE */
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#ifndef HAVE_POSIX_ACL_CHMOD
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static inline int
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posix_acl_chmod(struct posix_acl **acl, int flags, umode_t umode) {
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struct posix_acl *oldacl = *acl;
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mode_t mode = umode;
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int error;
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*acl = posix_acl_clone(*acl, flags);
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zpl_posix_acl_release(oldacl);
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if (!(*acl))
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return (-ENOMEM);
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error = posix_acl_chmod_masq(*acl, mode);
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if (error) {
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zpl_posix_acl_release(*acl);
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*acl = NULL;
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}
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return (error);
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}
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static inline int
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posix_acl_create(struct posix_acl **acl, int flags, umode_t *umodep) {
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struct posix_acl *oldacl = *acl;
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mode_t mode = *umodep;
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int error;
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*acl = posix_acl_clone(*acl, flags);
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zpl_posix_acl_release(oldacl);
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if (!(*acl))
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return (-ENOMEM);
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error = posix_acl_create_masq(*acl, &mode);
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*umodep = mode;
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if (error < 0) {
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zpl_posix_acl_release(*acl);
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*acl = NULL;
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}
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return (error);
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}
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#endif /* HAVE_POSIX_ACL_CHMOD */
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#ifndef HAVE_CURRENT_UMASK
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static inline int
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current_umask(void)
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{
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return (current->fs->umask);
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}
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#endif /* HAVE_CURRENT_UMASK */
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#ifdef HAVE_POSIX_ACL_EQUIV_MODE_UMODE_T
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typedef umode_t zpl_equivmode_t;
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#else
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typedef mode_t zpl_equivmode_t;
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#endif /* HAVE_POSIX_ACL_EQUIV_MODE_UMODE_T */
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#endif /* CONFIG_FS_POSIX_ACL */
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#endif /* _ZFS_VFS_H */
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