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fdbc1ba99d
Linux 4.7 changes i_mutex to i_rwsem, and we should used inode_lock and
inode_lock_shared to do exclusive and shared lock respectively.
We use spl_inode_lock{,_shared}() to hide the difference. Note that on older
kernel you'll always take an exclusive lock.
We also add all other inode_lock friends. And nested users now should
explicitly call spl_inode_lock_nested with correct subclass.
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue zfsonlinux/zfs#4665
Closes #549
101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
/*****************************************************************************\
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://zfsonlinux.org/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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\*****************************************************************************/
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#ifndef _SPL_FILE_COMPAT_H
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#define _SPL_FILE_COMPAT_H
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#include <linux/fs.h>
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#ifdef HAVE_FDTABLE_HEADER
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#include <linux/fdtable.h>
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#endif
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static inline struct file *
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spl_filp_open(const char *name, int flags, int mode, int *err)
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{
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struct file *filp = NULL;
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int rc;
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filp = filp_open(name, flags, mode);
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if (IS_ERR(filp)) {
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rc = PTR_ERR(filp);
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if (err)
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*err = rc;
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filp = NULL;
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}
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return filp;
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}
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#define spl_filp_close(f) filp_close(f, NULL)
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#define spl_filp_poff(f) (&(f)->f_pos)
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#define spl_filp_write(fp, b, s, p) (fp)->f_op->write((fp), (b), (s), p)
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static inline int
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spl_filp_fallocate(struct file *fp, int mode, loff_t offset, loff_t len)
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{
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int error = -EOPNOTSUPP;
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#ifdef HAVE_FILE_FALLOCATE
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if (fp->f_op->fallocate)
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error = fp->f_op->fallocate(fp, mode, offset, len);
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#else
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#ifdef HAVE_INODE_FALLOCATE
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if (fp->f_dentry && fp->f_dentry->d_inode &&
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fp->f_dentry->d_inode->i_op->fallocate)
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error = fp->f_dentry->d_inode->i_op->fallocate(
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fp->f_dentry->d_inode, mode, offset, len);
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#endif /* HAVE_INODE_FALLOCATE */
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#endif /*HAVE_FILE_FALLOCATE */
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return (error);
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}
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#ifdef HAVE_2ARGS_VFS_FSYNC
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#define spl_filp_fsync(fp, sync) vfs_fsync(fp, sync)
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#else
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#define spl_filp_fsync(fp, sync) vfs_fsync(fp, (fp)->f_dentry, sync)
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#endif /* HAVE_2ARGS_VFS_FSYNC */
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#ifdef HAVE_INODE_LOCK_SHARED
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#define spl_inode_lock(ip) inode_lock(ip)
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#define spl_inode_unlock(ip) inode_unlock(ip)
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#define spl_inode_lock_shared(ip) inode_lock_shared(ip)
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#define spl_inode_unlock_shared(ip) inode_unlock_shared(ip)
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#define spl_inode_trylock(ip) inode_trylock(ip)
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#define spl_inode_trylock_shared(ip) inode_trylock_shared(ip)
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#define spl_inode_is_locked(ip) inode_is_locked(ip)
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#define spl_inode_lock_nested(ip, s) inode_lock_nested(ip, s)
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#else
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#define spl_inode_lock(ip) mutex_lock(&(ip)->i_mutex)
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#define spl_inode_unlock(ip) mutex_unlock(&(ip)->i_mutex)
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#define spl_inode_lock_shared(ip) mutex_lock(&(ip)->i_mutex)
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#define spl_inode_unlock_shared(ip) mutex_unlock(&(ip)->i_mutex)
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#define spl_inode_trylock(ip) mutex_trylock(&(ip)->i_mutex)
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#define spl_inode_trylock_shared(ip) mutex_trylock(&(ip)->i_mutex)
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#define spl_inode_is_locked(ip) mutex_is_locked(&(ip)->i_mutex)
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#define spl_inode_lock_nested(ip, s) mutex_lock_nested(&(ip)->i_mutex, s)
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#endif
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#endif /* SPL_FILE_COMPAT_H */
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