02c24a8218
Btrfs needs to be able to control how filemap_write_and_wait_range() is called in fsync to make it less of a painful operation, so push down taking i_mutex and the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some file systems can drop taking the i_mutex altogether it seems, like ext3 and ocfs2. For correctness sake I just pushed everything down in all cases to make sure that we keep the current behavior the same for everybody, and then each individual fs maintainer can make up their mind about what to do from there. Thanks, Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
164 lines
4.4 KiB
C
164 lines
4.4 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2000-2002
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* Portions Copyright (C) Christoph Hellwig, 2001-2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/mm.h>
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#include <linux/fs.h>
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#include <linux/quotaops.h>
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#include "jfs_incore.h"
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#include "jfs_inode.h"
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#include "jfs_dmap.h"
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#include "jfs_txnmgr.h"
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#include "jfs_xattr.h"
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#include "jfs_acl.h"
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#include "jfs_debug.h"
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int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
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{
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struct inode *inode = file->f_mapping->host;
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int rc = 0;
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rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
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if (rc)
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return rc;
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mutex_lock(&inode->i_mutex);
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if (!(inode->i_state & I_DIRTY) ||
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(datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
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/* Make sure committed changes hit the disk */
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jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
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mutex_unlock(&inode->i_mutex);
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return rc;
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}
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rc |= jfs_commit_inode(inode, 1);
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mutex_unlock(&inode->i_mutex);
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return rc ? -EIO : 0;
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}
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static int jfs_open(struct inode *inode, struct file *file)
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{
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int rc;
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if ((rc = dquot_file_open(inode, file)))
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return rc;
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/*
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* We attempt to allow only one "active" file open per aggregate
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* group. Otherwise, appending to files in parallel can cause
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* fragmentation within the files.
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*
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* If the file is empty, it was probably just created and going
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* to be written to. If it has a size, we'll hold off until the
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* file is actually grown.
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*/
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if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
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(inode->i_size == 0)) {
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struct jfs_inode_info *ji = JFS_IP(inode);
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spin_lock_irq(&ji->ag_lock);
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if (ji->active_ag == -1) {
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struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
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ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
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atomic_inc( &jfs_sb->bmap->db_active[ji->active_ag]);
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}
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spin_unlock_irq(&ji->ag_lock);
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}
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return 0;
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}
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static int jfs_release(struct inode *inode, struct file *file)
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{
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struct jfs_inode_info *ji = JFS_IP(inode);
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spin_lock_irq(&ji->ag_lock);
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if (ji->active_ag != -1) {
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struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
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atomic_dec(&bmap->db_active[ji->active_ag]);
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ji->active_ag = -1;
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}
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spin_unlock_irq(&ji->ag_lock);
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return 0;
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}
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int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
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{
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struct inode *inode = dentry->d_inode;
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int rc;
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rc = inode_change_ok(inode, iattr);
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if (rc)
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return rc;
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if (is_quota_modification(inode, iattr))
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dquot_initialize(inode);
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if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
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(iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
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rc = dquot_transfer(inode, iattr);
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if (rc)
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return rc;
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}
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if ((iattr->ia_valid & ATTR_SIZE) &&
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iattr->ia_size != i_size_read(inode)) {
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inode_dio_wait(inode);
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rc = vmtruncate(inode, iattr->ia_size);
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if (rc)
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return rc;
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}
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setattr_copy(inode, iattr);
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mark_inode_dirty(inode);
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if (iattr->ia_valid & ATTR_MODE)
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rc = jfs_acl_chmod(inode);
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return rc;
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}
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const struct inode_operations jfs_file_inode_operations = {
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.truncate = jfs_truncate,
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.setxattr = jfs_setxattr,
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.getxattr = jfs_getxattr,
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.listxattr = jfs_listxattr,
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.removexattr = jfs_removexattr,
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.setattr = jfs_setattr,
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#ifdef CONFIG_JFS_POSIX_ACL
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.check_acl = jfs_check_acl,
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#endif
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};
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const struct file_operations jfs_file_operations = {
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.open = jfs_open,
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.llseek = generic_file_llseek,
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.write = do_sync_write,
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.read = do_sync_read,
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.aio_read = generic_file_aio_read,
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.aio_write = generic_file_aio_write,
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.mmap = generic_file_mmap,
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.splice_read = generic_file_splice_read,
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.splice_write = generic_file_splice_write,
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.fsync = jfs_fsync,
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.release = jfs_release,
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.unlocked_ioctl = jfs_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = jfs_compat_ioctl,
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#endif
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};
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