![Fernando Carrijo](/assets/img/avatar_default.png)
Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Acked-by: Theodore Ts'o <tytso@mit.edu> Acked-by: Mark Fasheh <mfasheh@suse.com> Acked-by: David S. Miller <davem@davemloft.net> Cc: James Morris <jmorris@namei.org> Acked-by: Casey Schaufler <casey@schaufler-ca.com> Acked-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2164 lines
52 KiB
C
2164 lines
52 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* file.c
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*
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* File open, close, extend, truncate
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*
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* Copyright (C) 2002, 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (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 the GNU
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* 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
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <linux/capability.h>
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/highmem.h>
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#include <linux/pagemap.h>
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#include <linux/uio.h>
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#include <linux/sched.h>
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#include <linux/splice.h>
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#include <linux/mount.h>
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#include <linux/writeback.h>
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#include <linux/falloc.h>
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#include <linux/quotaops.h>
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#define MLOG_MASK_PREFIX ML_INODE
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#include <cluster/masklog.h>
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#include "ocfs2.h"
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#include "alloc.h"
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#include "aops.h"
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#include "dir.h"
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#include "dlmglue.h"
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#include "extent_map.h"
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#include "file.h"
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#include "sysfile.h"
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#include "inode.h"
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#include "ioctl.h"
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#include "journal.h"
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#include "locks.h"
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#include "mmap.h"
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#include "suballoc.h"
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#include "super.h"
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#include "xattr.h"
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#include "acl.h"
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#include "quota.h"
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#include "buffer_head_io.h"
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static int ocfs2_sync_inode(struct inode *inode)
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{
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filemap_fdatawrite(inode->i_mapping);
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return sync_mapping_buffers(inode->i_mapping);
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}
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static int ocfs2_init_file_private(struct inode *inode, struct file *file)
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{
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struct ocfs2_file_private *fp;
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fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
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if (!fp)
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return -ENOMEM;
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fp->fp_file = file;
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mutex_init(&fp->fp_mutex);
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ocfs2_file_lock_res_init(&fp->fp_flock, fp);
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file->private_data = fp;
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return 0;
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}
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static void ocfs2_free_file_private(struct inode *inode, struct file *file)
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{
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struct ocfs2_file_private *fp = file->private_data;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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if (fp) {
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ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
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ocfs2_lock_res_free(&fp->fp_flock);
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kfree(fp);
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file->private_data = NULL;
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}
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}
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static int ocfs2_file_open(struct inode *inode, struct file *file)
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{
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int status;
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int mode = file->f_flags;
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struct ocfs2_inode_info *oi = OCFS2_I(inode);
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mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
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file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name);
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spin_lock(&oi->ip_lock);
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/* Check that the inode hasn't been wiped from disk by another
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* node. If it hasn't then we're safe as long as we hold the
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* spin lock until our increment of open count. */
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if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
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spin_unlock(&oi->ip_lock);
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status = -ENOENT;
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goto leave;
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}
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if (mode & O_DIRECT)
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oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;
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oi->ip_open_count++;
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spin_unlock(&oi->ip_lock);
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status = ocfs2_init_file_private(inode, file);
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if (status) {
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/*
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* We want to set open count back if we're failing the
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* open.
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*/
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spin_lock(&oi->ip_lock);
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oi->ip_open_count--;
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spin_unlock(&oi->ip_lock);
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}
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leave:
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mlog_exit(status);
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return status;
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}
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static int ocfs2_file_release(struct inode *inode, struct file *file)
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{
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struct ocfs2_inode_info *oi = OCFS2_I(inode);
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mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file,
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file->f_path.dentry->d_name.len,
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file->f_path.dentry->d_name.name);
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spin_lock(&oi->ip_lock);
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if (!--oi->ip_open_count)
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oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
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spin_unlock(&oi->ip_lock);
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ocfs2_free_file_private(inode, file);
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mlog_exit(0);
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return 0;
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}
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static int ocfs2_dir_open(struct inode *inode, struct file *file)
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{
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return ocfs2_init_file_private(inode, file);
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}
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static int ocfs2_dir_release(struct inode *inode, struct file *file)
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{
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ocfs2_free_file_private(inode, file);
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return 0;
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}
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static int ocfs2_sync_file(struct file *file,
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struct dentry *dentry,
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int datasync)
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{
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int err = 0;
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journal_t *journal;
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struct inode *inode = dentry->d_inode;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync,
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dentry->d_name.len, dentry->d_name.name);
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err = ocfs2_sync_inode(dentry->d_inode);
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if (err)
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goto bail;
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journal = osb->journal->j_journal;
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err = jbd2_journal_force_commit(journal);
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bail:
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mlog_exit(err);
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return (err < 0) ? -EIO : 0;
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}
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int ocfs2_should_update_atime(struct inode *inode,
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struct vfsmount *vfsmnt)
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{
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struct timespec now;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
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return 0;
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if ((inode->i_flags & S_NOATIME) ||
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((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
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return 0;
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/*
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* We can be called with no vfsmnt structure - NFSD will
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* sometimes do this.
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*
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* Note that our action here is different than touch_atime() -
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* if we can't tell whether this is a noatime mount, then we
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* don't know whether to trust the value of s_atime_quantum.
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*/
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if (vfsmnt == NULL)
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return 0;
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if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
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((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
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return 0;
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if (vfsmnt->mnt_flags & MNT_RELATIME) {
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if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
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(timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
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return 1;
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return 0;
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}
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now = CURRENT_TIME;
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if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
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return 0;
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else
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return 1;
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}
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int ocfs2_update_inode_atime(struct inode *inode,
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struct buffer_head *bh)
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{
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int ret;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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handle_t *handle;
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struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
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mlog_entry_void();
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handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
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if (IS_ERR(handle)) {
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ret = PTR_ERR(handle);
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mlog_errno(ret);
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goto out;
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}
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ret = ocfs2_journal_access_di(handle, inode, bh,
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OCFS2_JOURNAL_ACCESS_WRITE);
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if (ret) {
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mlog_errno(ret);
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goto out_commit;
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}
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/*
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* Don't use ocfs2_mark_inode_dirty() here as we don't always
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* have i_mutex to guard against concurrent changes to other
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* inode fields.
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*/
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inode->i_atime = CURRENT_TIME;
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di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
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di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
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ret = ocfs2_journal_dirty(handle, bh);
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if (ret < 0)
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mlog_errno(ret);
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out_commit:
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ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
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out:
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mlog_exit(ret);
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return ret;
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}
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static int ocfs2_set_inode_size(handle_t *handle,
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struct inode *inode,
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struct buffer_head *fe_bh,
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u64 new_i_size)
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{
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int status;
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mlog_entry_void();
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i_size_write(inode, new_i_size);
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inode->i_blocks = ocfs2_inode_sector_count(inode);
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inode->i_ctime = inode->i_mtime = CURRENT_TIME;
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status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
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if (status < 0) {
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mlog_errno(status);
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goto bail;
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}
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bail:
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mlog_exit(status);
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return status;
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}
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int ocfs2_simple_size_update(struct inode *inode,
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struct buffer_head *di_bh,
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u64 new_i_size)
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{
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int ret;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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handle_t *handle = NULL;
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handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
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if (IS_ERR(handle)) {
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ret = PTR_ERR(handle);
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mlog_errno(ret);
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goto out;
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}
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ret = ocfs2_set_inode_size(handle, inode, di_bh,
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new_i_size);
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if (ret < 0)
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mlog_errno(ret);
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ocfs2_commit_trans(osb, handle);
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out:
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return ret;
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}
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|
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static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
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struct inode *inode,
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struct buffer_head *fe_bh,
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u64 new_i_size)
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{
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int status;
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handle_t *handle;
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struct ocfs2_dinode *di;
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u64 cluster_bytes;
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mlog_entry_void();
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/* TODO: This needs to actually orphan the inode in this
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* transaction. */
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handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
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if (IS_ERR(handle)) {
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status = PTR_ERR(handle);
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mlog_errno(status);
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goto out;
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}
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status = ocfs2_journal_access_di(handle, inode, fe_bh,
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OCFS2_JOURNAL_ACCESS_WRITE);
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if (status < 0) {
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mlog_errno(status);
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goto out_commit;
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}
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|
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/*
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* Do this before setting i_size.
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*/
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cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
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status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
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cluster_bytes);
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if (status) {
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mlog_errno(status);
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goto out_commit;
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}
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i_size_write(inode, new_i_size);
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inode->i_ctime = inode->i_mtime = CURRENT_TIME;
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di = (struct ocfs2_dinode *) fe_bh->b_data;
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di->i_size = cpu_to_le64(new_i_size);
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di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
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di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
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|
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status = ocfs2_journal_dirty(handle, fe_bh);
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if (status < 0)
|
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mlog_errno(status);
|
|
|
|
out_commit:
|
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ocfs2_commit_trans(osb, handle);
|
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out:
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|
|
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mlog_exit(status);
|
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return status;
|
|
}
|
|
|
|
static int ocfs2_truncate_file(struct inode *inode,
|
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struct buffer_head *di_bh,
|
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u64 new_i_size)
|
|
{
|
|
int status = 0;
|
|
struct ocfs2_dinode *fe = NULL;
|
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
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struct ocfs2_truncate_context *tc = NULL;
|
|
|
|
mlog_entry("(inode = %llu, new_i_size = %llu\n",
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(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)new_i_size);
|
|
|
|
/* We trust di_bh because it comes from ocfs2_inode_lock(), which
|
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* already validated it */
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fe = (struct ocfs2_dinode *) di_bh->b_data;
|
|
|
|
mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
|
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"Inode %llu, inode i_size = %lld != di "
|
|
"i_size = %llu, i_flags = 0x%x\n",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
i_size_read(inode),
|
|
(unsigned long long)le64_to_cpu(fe->i_size),
|
|
le32_to_cpu(fe->i_flags));
|
|
|
|
if (new_i_size > le64_to_cpu(fe->i_size)) {
|
|
mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n",
|
|
(unsigned long long)le64_to_cpu(fe->i_size),
|
|
(unsigned long long)new_i_size);
|
|
status = -EINVAL;
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n",
|
|
(unsigned long long)le64_to_cpu(fe->i_blkno),
|
|
(unsigned long long)le64_to_cpu(fe->i_size),
|
|
(unsigned long long)new_i_size);
|
|
|
|
/* lets handle the simple truncate cases before doing any more
|
|
* cluster locking. */
|
|
if (new_i_size == le64_to_cpu(fe->i_size))
|
|
goto bail;
|
|
|
|
down_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
|
|
/*
|
|
* The inode lock forced other nodes to sync and drop their
|
|
* pages, which (correctly) happens even if we have a truncate
|
|
* without allocation change - ocfs2 cluster sizes can be much
|
|
* greater than page size, so we have to truncate them
|
|
* anyway.
|
|
*/
|
|
unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
|
|
truncate_inode_pages(inode->i_mapping, new_i_size);
|
|
|
|
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
|
|
i_size_read(inode), 1);
|
|
if (status)
|
|
mlog_errno(status);
|
|
|
|
goto bail_unlock_sem;
|
|
}
|
|
|
|
/* alright, we're going to need to do a full blown alloc size
|
|
* change. Orphan the inode so that recovery can complete the
|
|
* truncate if necessary. This does the task of marking
|
|
* i_size. */
|
|
status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail_unlock_sem;
|
|
}
|
|
|
|
status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail_unlock_sem;
|
|
}
|
|
|
|
status = ocfs2_commit_truncate(osb, inode, di_bh, tc);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail_unlock_sem;
|
|
}
|
|
|
|
/* TODO: orphan dir cleanup here. */
|
|
bail_unlock_sem:
|
|
up_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
|
|
bail:
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* extend file allocation only here.
|
|
* we'll update all the disk stuff, and oip->alloc_size
|
|
*
|
|
* expect stuff to be locked, a transaction started and enough data /
|
|
* metadata reservations in the contexts.
|
|
*
|
|
* Will return -EAGAIN, and a reason if a restart is needed.
|
|
* If passed in, *reason will always be set, even in error.
|
|
*/
|
|
int ocfs2_add_inode_data(struct ocfs2_super *osb,
|
|
struct inode *inode,
|
|
u32 *logical_offset,
|
|
u32 clusters_to_add,
|
|
int mark_unwritten,
|
|
struct buffer_head *fe_bh,
|
|
handle_t *handle,
|
|
struct ocfs2_alloc_context *data_ac,
|
|
struct ocfs2_alloc_context *meta_ac,
|
|
enum ocfs2_alloc_restarted *reason_ret)
|
|
{
|
|
int ret;
|
|
struct ocfs2_extent_tree et;
|
|
|
|
ocfs2_init_dinode_extent_tree(&et, inode, fe_bh);
|
|
ret = ocfs2_add_clusters_in_btree(osb, inode, logical_offset,
|
|
clusters_to_add, mark_unwritten,
|
|
&et, handle,
|
|
data_ac, meta_ac, reason_ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
|
|
u32 clusters_to_add, int mark_unwritten)
|
|
{
|
|
int status = 0;
|
|
int restart_func = 0;
|
|
int credits;
|
|
u32 prev_clusters;
|
|
struct buffer_head *bh = NULL;
|
|
struct ocfs2_dinode *fe = NULL;
|
|
handle_t *handle = NULL;
|
|
struct ocfs2_alloc_context *data_ac = NULL;
|
|
struct ocfs2_alloc_context *meta_ac = NULL;
|
|
enum ocfs2_alloc_restarted why;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_extent_tree et;
|
|
int did_quota = 0;
|
|
|
|
mlog_entry("(clusters_to_add = %u)\n", clusters_to_add);
|
|
|
|
/*
|
|
* This function only exists for file systems which don't
|
|
* support holes.
|
|
*/
|
|
BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
|
|
|
|
status = ocfs2_read_inode_block(inode, &bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
fe = (struct ocfs2_dinode *) bh->b_data;
|
|
|
|
restart_all:
|
|
BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
|
|
|
|
mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
|
|
"clusters_to_add = %u\n",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(long long)i_size_read(inode), le32_to_cpu(fe->i_clusters),
|
|
clusters_to_add);
|
|
ocfs2_init_dinode_extent_tree(&et, inode, bh);
|
|
status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
|
|
&data_ac, &meta_ac);
|
|
if (status) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list,
|
|
clusters_to_add);
|
|
handle = ocfs2_start_trans(osb, credits);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
handle = NULL;
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
restarted_transaction:
|
|
if (vfs_dq_alloc_space_nodirty(inode, ocfs2_clusters_to_bytes(osb->sb,
|
|
clusters_to_add))) {
|
|
status = -EDQUOT;
|
|
goto leave;
|
|
}
|
|
did_quota = 1;
|
|
|
|
/* reserve a write to the file entry early on - that we if we
|
|
* run out of credits in the allocation path, we can still
|
|
* update i_size. */
|
|
status = ocfs2_journal_access_di(handle, inode, bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
prev_clusters = OCFS2_I(inode)->ip_clusters;
|
|
|
|
status = ocfs2_add_inode_data(osb,
|
|
inode,
|
|
&logical_start,
|
|
clusters_to_add,
|
|
mark_unwritten,
|
|
bh,
|
|
handle,
|
|
data_ac,
|
|
meta_ac,
|
|
&why);
|
|
if ((status < 0) && (status != -EAGAIN)) {
|
|
if (status != -ENOSPC)
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
status = ocfs2_journal_dirty(handle, bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
|
|
spin_lock(&OCFS2_I(inode)->ip_lock);
|
|
clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
|
|
spin_unlock(&OCFS2_I(inode)->ip_lock);
|
|
/* Release unused quota reservation */
|
|
vfs_dq_free_space(inode,
|
|
ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
|
|
did_quota = 0;
|
|
|
|
if (why != RESTART_NONE && clusters_to_add) {
|
|
if (why == RESTART_META) {
|
|
mlog(0, "restarting function.\n");
|
|
restart_func = 1;
|
|
} else {
|
|
BUG_ON(why != RESTART_TRANS);
|
|
|
|
mlog(0, "restarting transaction.\n");
|
|
/* TODO: This can be more intelligent. */
|
|
credits = ocfs2_calc_extend_credits(osb->sb,
|
|
&fe->id2.i_list,
|
|
clusters_to_add);
|
|
status = ocfs2_extend_trans(handle, credits);
|
|
if (status < 0) {
|
|
/* handle still has to be committed at
|
|
* this point. */
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto leave;
|
|
}
|
|
goto restarted_transaction;
|
|
}
|
|
}
|
|
|
|
mlog(0, "fe: i_clusters = %u, i_size=%llu\n",
|
|
le32_to_cpu(fe->i_clusters),
|
|
(unsigned long long)le64_to_cpu(fe->i_size));
|
|
mlog(0, "inode: ip_clusters=%u, i_size=%lld\n",
|
|
OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode));
|
|
|
|
leave:
|
|
if (status < 0 && did_quota)
|
|
vfs_dq_free_space(inode,
|
|
ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
|
|
if (handle) {
|
|
ocfs2_commit_trans(osb, handle);
|
|
handle = NULL;
|
|
}
|
|
if (data_ac) {
|
|
ocfs2_free_alloc_context(data_ac);
|
|
data_ac = NULL;
|
|
}
|
|
if (meta_ac) {
|
|
ocfs2_free_alloc_context(meta_ac);
|
|
meta_ac = NULL;
|
|
}
|
|
if ((!status) && restart_func) {
|
|
restart_func = 0;
|
|
goto restart_all;
|
|
}
|
|
brelse(bh);
|
|
bh = NULL;
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
/* Some parts of this taken from generic_cont_expand, which turned out
|
|
* to be too fragile to do exactly what we need without us having to
|
|
* worry about recursive locking in ->write_begin() and ->write_end(). */
|
|
static int ocfs2_write_zero_page(struct inode *inode,
|
|
u64 size)
|
|
{
|
|
struct address_space *mapping = inode->i_mapping;
|
|
struct page *page;
|
|
unsigned long index;
|
|
unsigned int offset;
|
|
handle_t *handle = NULL;
|
|
int ret;
|
|
|
|
offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */
|
|
/* ugh. in prepare/commit_write, if from==to==start of block, we
|
|
** skip the prepare. make sure we never send an offset for the start
|
|
** of a block
|
|
*/
|
|
if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) {
|
|
offset++;
|
|
}
|
|
index = size >> PAGE_CACHE_SHIFT;
|
|
|
|
page = grab_cache_page(mapping, index);
|
|
if (!page) {
|
|
ret = -ENOMEM;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_prepare_write_nolock(inode, page, offset, offset);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (ocfs2_should_order_data(inode)) {
|
|
handle = ocfs2_start_walk_page_trans(inode, page, offset,
|
|
offset);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
handle = NULL;
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
|
|
/* must not update i_size! */
|
|
ret = block_commit_write(page, offset, offset);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
else
|
|
ret = 0;
|
|
|
|
if (handle)
|
|
ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
|
|
out_unlock:
|
|
unlock_page(page);
|
|
page_cache_release(page);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_zero_extend(struct inode *inode,
|
|
u64 zero_to_size)
|
|
{
|
|
int ret = 0;
|
|
u64 start_off;
|
|
struct super_block *sb = inode->i_sb;
|
|
|
|
start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
|
|
while (start_off < zero_to_size) {
|
|
ret = ocfs2_write_zero_page(inode, start_off);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
start_off += sb->s_blocksize;
|
|
|
|
/*
|
|
* Very large extends have the potential to lock up
|
|
* the cpu for extended periods of time.
|
|
*/
|
|
cond_resched();
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to)
|
|
{
|
|
int ret;
|
|
u32 clusters_to_add;
|
|
struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
|
clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
|
|
if (clusters_to_add < oi->ip_clusters)
|
|
clusters_to_add = 0;
|
|
else
|
|
clusters_to_add -= oi->ip_clusters;
|
|
|
|
if (clusters_to_add) {
|
|
ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
|
|
clusters_to_add, 0);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Call this even if we don't add any clusters to the tree. We
|
|
* still need to zero the area between the old i_size and the
|
|
* new i_size.
|
|
*/
|
|
ret = ocfs2_zero_extend(inode, zero_to);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_extend_file(struct inode *inode,
|
|
struct buffer_head *di_bh,
|
|
u64 new_i_size)
|
|
{
|
|
int ret = 0;
|
|
struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
|
|
BUG_ON(!di_bh);
|
|
|
|
/* setattr sometimes calls us like this. */
|
|
if (new_i_size == 0)
|
|
goto out;
|
|
|
|
if (i_size_read(inode) == new_i_size)
|
|
goto out;
|
|
BUG_ON(new_i_size < i_size_read(inode));
|
|
|
|
/*
|
|
* Fall through for converting inline data, even if the fs
|
|
* supports sparse files.
|
|
*
|
|
* The check for inline data here is legal - nobody can add
|
|
* the feature since we have i_mutex. We must check it again
|
|
* after acquiring ip_alloc_sem though, as paths like mmap
|
|
* might have raced us to converting the inode to extents.
|
|
*/
|
|
if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
|
|
&& ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
|
|
goto out_update_size;
|
|
|
|
/*
|
|
* The alloc sem blocks people in read/write from reading our
|
|
* allocation until we're done changing it. We depend on
|
|
* i_mutex to block other extend/truncate calls while we're
|
|
* here.
|
|
*/
|
|
down_write(&oi->ip_alloc_sem);
|
|
|
|
if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
/*
|
|
* We can optimize small extends by keeping the inodes
|
|
* inline data.
|
|
*/
|
|
if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
|
|
up_write(&oi->ip_alloc_sem);
|
|
goto out_update_size;
|
|
}
|
|
|
|
ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
|
|
if (ret) {
|
|
up_write(&oi->ip_alloc_sem);
|
|
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
|
|
ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size);
|
|
|
|
up_write(&oi->ip_alloc_sem);
|
|
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
out_update_size:
|
|
ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
int status = 0, size_change;
|
|
struct inode *inode = dentry->d_inode;
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ocfs2_super *osb = OCFS2_SB(sb);
|
|
struct buffer_head *bh = NULL;
|
|
handle_t *handle = NULL;
|
|
int locked[MAXQUOTAS] = {0, 0};
|
|
int credits, qtype;
|
|
struct ocfs2_mem_dqinfo *oinfo;
|
|
|
|
mlog_entry("(0x%p, '%.*s')\n", dentry,
|
|
dentry->d_name.len, dentry->d_name.name);
|
|
|
|
/* ensuring we don't even attempt to truncate a symlink */
|
|
if (S_ISLNK(inode->i_mode))
|
|
attr->ia_valid &= ~ATTR_SIZE;
|
|
|
|
if (attr->ia_valid & ATTR_MODE)
|
|
mlog(0, "mode change: %d\n", attr->ia_mode);
|
|
if (attr->ia_valid & ATTR_UID)
|
|
mlog(0, "uid change: %d\n", attr->ia_uid);
|
|
if (attr->ia_valid & ATTR_GID)
|
|
mlog(0, "gid change: %d\n", attr->ia_gid);
|
|
if (attr->ia_valid & ATTR_SIZE)
|
|
mlog(0, "size change...\n");
|
|
if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME))
|
|
mlog(0, "time change...\n");
|
|
|
|
#define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \
|
|
| ATTR_GID | ATTR_UID | ATTR_MODE)
|
|
if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) {
|
|
mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid);
|
|
return 0;
|
|
}
|
|
|
|
status = inode_change_ok(inode, attr);
|
|
if (status)
|
|
return status;
|
|
|
|
size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE;
|
|
if (size_change) {
|
|
status = ocfs2_rw_lock(inode, 1);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
status = ocfs2_inode_lock(inode, &bh, 1);
|
|
if (status < 0) {
|
|
if (status != -ENOENT)
|
|
mlog_errno(status);
|
|
goto bail_unlock_rw;
|
|
}
|
|
|
|
if (size_change && attr->ia_size != i_size_read(inode)) {
|
|
if (attr->ia_size > sb->s_maxbytes) {
|
|
status = -EFBIG;
|
|
goto bail_unlock;
|
|
}
|
|
|
|
if (i_size_read(inode) > attr->ia_size) {
|
|
if (ocfs2_should_order_data(inode)) {
|
|
status = ocfs2_begin_ordered_truncate(inode,
|
|
attr->ia_size);
|
|
if (status)
|
|
goto bail_unlock;
|
|
}
|
|
status = ocfs2_truncate_file(inode, bh, attr->ia_size);
|
|
} else
|
|
status = ocfs2_extend_file(inode, bh, attr->ia_size);
|
|
if (status < 0) {
|
|
if (status != -ENOSPC)
|
|
mlog_errno(status);
|
|
status = -ENOSPC;
|
|
goto bail_unlock;
|
|
}
|
|
}
|
|
|
|
if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
|
|
(attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
|
|
credits = OCFS2_INODE_UPDATE_CREDITS;
|
|
if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid
|
|
&& OCFS2_HAS_RO_COMPAT_FEATURE(sb,
|
|
OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
|
|
oinfo = sb_dqinfo(sb, USRQUOTA)->dqi_priv;
|
|
status = ocfs2_lock_global_qf(oinfo, 1);
|
|
if (status < 0)
|
|
goto bail_unlock;
|
|
credits += ocfs2_calc_qinit_credits(sb, USRQUOTA) +
|
|
ocfs2_calc_qdel_credits(sb, USRQUOTA);
|
|
locked[USRQUOTA] = 1;
|
|
}
|
|
if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid
|
|
&& OCFS2_HAS_RO_COMPAT_FEATURE(sb,
|
|
OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
|
|
oinfo = sb_dqinfo(sb, GRPQUOTA)->dqi_priv;
|
|
status = ocfs2_lock_global_qf(oinfo, 1);
|
|
if (status < 0)
|
|
goto bail_unlock;
|
|
credits += ocfs2_calc_qinit_credits(sb, GRPQUOTA) +
|
|
ocfs2_calc_qdel_credits(sb, GRPQUOTA);
|
|
locked[GRPQUOTA] = 1;
|
|
}
|
|
handle = ocfs2_start_trans(osb, credits);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto bail_unlock;
|
|
}
|
|
status = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
|
|
if (status < 0)
|
|
goto bail_commit;
|
|
} else {
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto bail_unlock;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This will intentionally not wind up calling vmtruncate(),
|
|
* since all the work for a size change has been done above.
|
|
* Otherwise, we could get into problems with truncate as
|
|
* ip_alloc_sem is used there to protect against i_size
|
|
* changes.
|
|
*/
|
|
status = inode_setattr(inode, attr);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail_commit;
|
|
}
|
|
|
|
status = ocfs2_mark_inode_dirty(handle, inode, bh);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
bail_commit:
|
|
ocfs2_commit_trans(osb, handle);
|
|
bail_unlock:
|
|
for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
|
|
if (!locked[qtype])
|
|
continue;
|
|
oinfo = sb_dqinfo(sb, qtype)->dqi_priv;
|
|
ocfs2_unlock_global_qf(oinfo, 1);
|
|
}
|
|
ocfs2_inode_unlock(inode, 1);
|
|
bail_unlock_rw:
|
|
if (size_change)
|
|
ocfs2_rw_unlock(inode, 1);
|
|
bail:
|
|
brelse(bh);
|
|
|
|
if (!status && attr->ia_valid & ATTR_MODE) {
|
|
status = ocfs2_acl_chmod(inode);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
}
|
|
|
|
mlog_exit(status);
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_getattr(struct vfsmount *mnt,
|
|
struct dentry *dentry,
|
|
struct kstat *stat)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct super_block *sb = dentry->d_inode->i_sb;
|
|
struct ocfs2_super *osb = sb->s_fs_info;
|
|
int err;
|
|
|
|
mlog_entry_void();
|
|
|
|
err = ocfs2_inode_revalidate(dentry);
|
|
if (err) {
|
|
if (err != -ENOENT)
|
|
mlog_errno(err);
|
|
goto bail;
|
|
}
|
|
|
|
generic_fillattr(inode, stat);
|
|
|
|
/* We set the blksize from the cluster size for performance */
|
|
stat->blksize = osb->s_clustersize;
|
|
|
|
bail:
|
|
mlog_exit(err);
|
|
|
|
return err;
|
|
}
|
|
|
|
int ocfs2_permission(struct inode *inode, int mask)
|
|
{
|
|
int ret;
|
|
|
|
mlog_entry_void();
|
|
|
|
ret = ocfs2_inode_lock(inode, NULL, 0);
|
|
if (ret) {
|
|
if (ret != -ENOENT)
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = generic_permission(inode, mask, ocfs2_check_acl);
|
|
|
|
ocfs2_inode_unlock(inode, 0);
|
|
out:
|
|
mlog_exit(ret);
|
|
return ret;
|
|
}
|
|
|
|
static int __ocfs2_write_remove_suid(struct inode *inode,
|
|
struct buffer_head *bh)
|
|
{
|
|
int ret;
|
|
handle_t *handle;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_dinode *di;
|
|
|
|
mlog_entry("(Inode %llu, mode 0%o)\n",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_journal_access_di(handle, inode, bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_trans;
|
|
}
|
|
|
|
inode->i_mode &= ~S_ISUID;
|
|
if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
|
|
inode->i_mode &= ~S_ISGID;
|
|
|
|
di = (struct ocfs2_dinode *) bh->b_data;
|
|
di->i_mode = cpu_to_le16(inode->i_mode);
|
|
|
|
ret = ocfs2_journal_dirty(handle, bh);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
|
|
out_trans:
|
|
ocfs2_commit_trans(osb, handle);
|
|
out:
|
|
mlog_exit(ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Will look for holes and unwritten extents in the range starting at
|
|
* pos for count bytes (inclusive).
|
|
*/
|
|
static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos,
|
|
size_t count)
|
|
{
|
|
int ret = 0;
|
|
unsigned int extent_flags;
|
|
u32 cpos, clusters, extent_len, phys_cpos;
|
|
struct super_block *sb = inode->i_sb;
|
|
|
|
cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits;
|
|
clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
|
|
|
|
while (clusters) {
|
|
ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
|
|
&extent_flags);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
|
|
if (extent_len > clusters)
|
|
extent_len = clusters;
|
|
|
|
clusters -= extent_len;
|
|
cpos += extent_len;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_write_remove_suid(struct inode *inode)
|
|
{
|
|
int ret;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
ret = ocfs2_read_inode_block(inode, &bh);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = __ocfs2_write_remove_suid(inode, bh);
|
|
out:
|
|
brelse(bh);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Allocate enough extents to cover the region starting at byte offset
|
|
* start for len bytes. Existing extents are skipped, any extents
|
|
* added are marked as "unwritten".
|
|
*/
|
|
static int ocfs2_allocate_unwritten_extents(struct inode *inode,
|
|
u64 start, u64 len)
|
|
{
|
|
int ret;
|
|
u32 cpos, phys_cpos, clusters, alloc_size;
|
|
u64 end = start + len;
|
|
struct buffer_head *di_bh = NULL;
|
|
|
|
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
ret = ocfs2_read_inode_block(inode, &di_bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Nothing to do if the requested reservation range
|
|
* fits within the inode.
|
|
*/
|
|
if (ocfs2_size_fits_inline_data(di_bh, end))
|
|
goto out;
|
|
|
|
ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We consider both start and len to be inclusive.
|
|
*/
|
|
cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
|
|
clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
|
|
clusters -= cpos;
|
|
|
|
while (clusters) {
|
|
ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
|
|
&alloc_size, NULL);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Hole or existing extent len can be arbitrary, so
|
|
* cap it to our own allocation request.
|
|
*/
|
|
if (alloc_size > clusters)
|
|
alloc_size = clusters;
|
|
|
|
if (phys_cpos) {
|
|
/*
|
|
* We already have an allocation at this
|
|
* region so we can safely skip it.
|
|
*/
|
|
goto next;
|
|
}
|
|
|
|
ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
|
|
if (ret) {
|
|
if (ret != -ENOSPC)
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
next:
|
|
cpos += alloc_size;
|
|
clusters -= alloc_size;
|
|
}
|
|
|
|
ret = 0;
|
|
out:
|
|
|
|
brelse(di_bh);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Truncate a byte range, avoiding pages within partial clusters. This
|
|
* preserves those pages for the zeroing code to write to.
|
|
*/
|
|
static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
|
|
u64 byte_len)
|
|
{
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
loff_t start, end;
|
|
struct address_space *mapping = inode->i_mapping;
|
|
|
|
start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
|
|
end = byte_start + byte_len;
|
|
end = end & ~(osb->s_clustersize - 1);
|
|
|
|
if (start < end) {
|
|
unmap_mapping_range(mapping, start, end - start, 0);
|
|
truncate_inode_pages_range(mapping, start, end - 1);
|
|
}
|
|
}
|
|
|
|
static int ocfs2_zero_partial_clusters(struct inode *inode,
|
|
u64 start, u64 len)
|
|
{
|
|
int ret = 0;
|
|
u64 tmpend, end = start + len;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
unsigned int csize = osb->s_clustersize;
|
|
handle_t *handle;
|
|
|
|
/*
|
|
* The "start" and "end" values are NOT necessarily part of
|
|
* the range whose allocation is being deleted. Rather, this
|
|
* is what the user passed in with the request. We must zero
|
|
* partial clusters here. There's no need to worry about
|
|
* physical allocation - the zeroing code knows to skip holes.
|
|
*/
|
|
mlog(0, "byte start: %llu, end: %llu\n",
|
|
(unsigned long long)start, (unsigned long long)end);
|
|
|
|
/*
|
|
* If both edges are on a cluster boundary then there's no
|
|
* zeroing required as the region is part of the allocation to
|
|
* be truncated.
|
|
*/
|
|
if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
|
|
goto out;
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* We want to get the byte offset of the end of the 1st cluster.
|
|
*/
|
|
tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
|
|
if (tmpend > end)
|
|
tmpend = end;
|
|
|
|
mlog(0, "1st range: start: %llu, tmpend: %llu\n",
|
|
(unsigned long long)start, (unsigned long long)tmpend);
|
|
|
|
ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
|
|
if (tmpend < end) {
|
|
/*
|
|
* This may make start and end equal, but the zeroing
|
|
* code will skip any work in that case so there's no
|
|
* need to catch it up here.
|
|
*/
|
|
start = end & ~(osb->s_clustersize - 1);
|
|
|
|
mlog(0, "2nd range: start: %llu, end: %llu\n",
|
|
(unsigned long long)start, (unsigned long long)end);
|
|
|
|
ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
|
|
if (ret)
|
|
mlog_errno(ret);
|
|
}
|
|
|
|
ocfs2_commit_trans(osb, handle);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_remove_inode_range(struct inode *inode,
|
|
struct buffer_head *di_bh, u64 byte_start,
|
|
u64 byte_len)
|
|
{
|
|
int ret = 0;
|
|
u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_cached_dealloc_ctxt dealloc;
|
|
struct address_space *mapping = inode->i_mapping;
|
|
struct ocfs2_extent_tree et;
|
|
|
|
ocfs2_init_dinode_extent_tree(&et, inode, di_bh);
|
|
ocfs2_init_dealloc_ctxt(&dealloc);
|
|
|
|
if (byte_len == 0)
|
|
return 0;
|
|
|
|
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
|
|
byte_start + byte_len, 0);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
/*
|
|
* There's no need to get fancy with the page cache
|
|
* truncate of an inline-data inode. We're talking
|
|
* about less than a page here, which will be cached
|
|
* in the dinode buffer anyway.
|
|
*/
|
|
unmap_mapping_range(mapping, 0, 0, 0);
|
|
truncate_inode_pages(mapping, 0);
|
|
goto out;
|
|
}
|
|
|
|
trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
|
|
trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
|
|
if (trunc_len >= trunc_start)
|
|
trunc_len -= trunc_start;
|
|
else
|
|
trunc_len = 0;
|
|
|
|
mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n",
|
|
(unsigned long long)OCFS2_I(inode)->ip_blkno,
|
|
(unsigned long long)byte_start,
|
|
(unsigned long long)byte_len, trunc_start, trunc_len);
|
|
|
|
ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
cpos = trunc_start;
|
|
while (trunc_len) {
|
|
ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
|
|
&alloc_size, NULL);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (alloc_size > trunc_len)
|
|
alloc_size = trunc_len;
|
|
|
|
/* Only do work for non-holes */
|
|
if (phys_cpos != 0) {
|
|
ret = ocfs2_remove_btree_range(inode, &et, cpos,
|
|
phys_cpos, alloc_size,
|
|
&dealloc);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
cpos += alloc_size;
|
|
trunc_len -= alloc_size;
|
|
}
|
|
|
|
ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
|
|
|
|
out:
|
|
ocfs2_schedule_truncate_log_flush(osb, 1);
|
|
ocfs2_run_deallocs(osb, &dealloc);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Parts of this function taken from xfs_change_file_space()
|
|
*/
|
|
static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
|
|
loff_t f_pos, unsigned int cmd,
|
|
struct ocfs2_space_resv *sr,
|
|
int change_size)
|
|
{
|
|
int ret;
|
|
s64 llen;
|
|
loff_t size;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct buffer_head *di_bh = NULL;
|
|
handle_t *handle;
|
|
unsigned long long max_off = inode->i_sb->s_maxbytes;
|
|
|
|
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
|
|
return -EROFS;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
/*
|
|
* This prevents concurrent writes on other nodes
|
|
*/
|
|
ret = ocfs2_rw_lock(inode, 1);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_inode_lock(inode, &di_bh, 1);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out_rw_unlock;
|
|
}
|
|
|
|
if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
|
|
ret = -EPERM;
|
|
goto out_inode_unlock;
|
|
}
|
|
|
|
switch (sr->l_whence) {
|
|
case 0: /*SEEK_SET*/
|
|
break;
|
|
case 1: /*SEEK_CUR*/
|
|
sr->l_start += f_pos;
|
|
break;
|
|
case 2: /*SEEK_END*/
|
|
sr->l_start += i_size_read(inode);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto out_inode_unlock;
|
|
}
|
|
sr->l_whence = 0;
|
|
|
|
llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
|
|
|
|
if (sr->l_start < 0
|
|
|| sr->l_start > max_off
|
|
|| (sr->l_start + llen) < 0
|
|
|| (sr->l_start + llen) > max_off) {
|
|
ret = -EINVAL;
|
|
goto out_inode_unlock;
|
|
}
|
|
size = sr->l_start + sr->l_len;
|
|
|
|
if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
|
|
if (sr->l_len <= 0) {
|
|
ret = -EINVAL;
|
|
goto out_inode_unlock;
|
|
}
|
|
}
|
|
|
|
if (file && should_remove_suid(file->f_path.dentry)) {
|
|
ret = __ocfs2_write_remove_suid(inode, di_bh);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out_inode_unlock;
|
|
}
|
|
}
|
|
|
|
down_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
switch (cmd) {
|
|
case OCFS2_IOC_RESVSP:
|
|
case OCFS2_IOC_RESVSP64:
|
|
/*
|
|
* This takes unsigned offsets, but the signed ones we
|
|
* pass have been checked against overflow above.
|
|
*/
|
|
ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
|
|
sr->l_len);
|
|
break;
|
|
case OCFS2_IOC_UNRESVSP:
|
|
case OCFS2_IOC_UNRESVSP64:
|
|
ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
|
|
sr->l_len);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
up_write(&OCFS2_I(inode)->ip_alloc_sem);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out_inode_unlock;
|
|
}
|
|
|
|
/*
|
|
* We update c/mtime for these changes
|
|
*/
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
ret = PTR_ERR(handle);
|
|
mlog_errno(ret);
|
|
goto out_inode_unlock;
|
|
}
|
|
|
|
if (change_size && i_size_read(inode) < size)
|
|
i_size_write(inode, size);
|
|
|
|
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
|
|
ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
|
|
ocfs2_commit_trans(osb, handle);
|
|
|
|
out_inode_unlock:
|
|
brelse(di_bh);
|
|
ocfs2_inode_unlock(inode, 1);
|
|
out_rw_unlock:
|
|
ocfs2_rw_unlock(inode, 1);
|
|
|
|
out:
|
|
mutex_unlock(&inode->i_mutex);
|
|
return ret;
|
|
}
|
|
|
|
int ocfs2_change_file_space(struct file *file, unsigned int cmd,
|
|
struct ocfs2_space_resv *sr)
|
|
{
|
|
struct inode *inode = file->f_path.dentry->d_inode;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
|
|
!ocfs2_writes_unwritten_extents(osb))
|
|
return -ENOTTY;
|
|
else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
|
|
!ocfs2_sparse_alloc(osb))
|
|
return -ENOTTY;
|
|
|
|
if (!S_ISREG(inode->i_mode))
|
|
return -EINVAL;
|
|
|
|
if (!(file->f_mode & FMODE_WRITE))
|
|
return -EBADF;
|
|
|
|
return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
|
|
}
|
|
|
|
static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
|
|
loff_t len)
|
|
{
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_space_resv sr;
|
|
int change_size = 1;
|
|
|
|
if (!ocfs2_writes_unwritten_extents(osb))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (S_ISDIR(inode->i_mode))
|
|
return -ENODEV;
|
|
|
|
if (mode & FALLOC_FL_KEEP_SIZE)
|
|
change_size = 0;
|
|
|
|
sr.l_whence = 0;
|
|
sr.l_start = (s64)offset;
|
|
sr.l_len = (s64)len;
|
|
|
|
return __ocfs2_change_file_space(NULL, inode, offset,
|
|
OCFS2_IOC_RESVSP64, &sr, change_size);
|
|
}
|
|
|
|
static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
|
|
loff_t *ppos,
|
|
size_t count,
|
|
int appending,
|
|
int *direct_io)
|
|
{
|
|
int ret = 0, meta_level = 0;
|
|
struct inode *inode = dentry->d_inode;
|
|
loff_t saved_pos, end;
|
|
|
|
/*
|
|
* We start with a read level meta lock and only jump to an ex
|
|
* if we need to make modifications here.
|
|
*/
|
|
for(;;) {
|
|
ret = ocfs2_inode_lock(inode, NULL, meta_level);
|
|
if (ret < 0) {
|
|
meta_level = -1;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/* Clear suid / sgid if necessary. We do this here
|
|
* instead of later in the write path because
|
|
* remove_suid() calls ->setattr without any hint that
|
|
* we may have already done our cluster locking. Since
|
|
* ocfs2_setattr() *must* take cluster locks to
|
|
* proceeed, this will lead us to recursively lock the
|
|
* inode. There's also the dinode i_size state which
|
|
* can be lost via setattr during extending writes (we
|
|
* set inode->i_size at the end of a write. */
|
|
if (should_remove_suid(dentry)) {
|
|
if (meta_level == 0) {
|
|
ocfs2_inode_unlock(inode, meta_level);
|
|
meta_level = 1;
|
|
continue;
|
|
}
|
|
|
|
ret = ocfs2_write_remove_suid(inode);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_unlock;
|
|
}
|
|
}
|
|
|
|
/* work on a copy of ppos until we're sure that we won't have
|
|
* to recalculate it due to relocking. */
|
|
if (appending) {
|
|
saved_pos = i_size_read(inode);
|
|
mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos);
|
|
} else {
|
|
saved_pos = *ppos;
|
|
}
|
|
|
|
end = saved_pos + count;
|
|
|
|
/*
|
|
* Skip the O_DIRECT checks if we don't need
|
|
* them.
|
|
*/
|
|
if (!direct_io || !(*direct_io))
|
|
break;
|
|
|
|
/*
|
|
* There's no sane way to do direct writes to an inode
|
|
* with inline data.
|
|
*/
|
|
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
|
|
*direct_io = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Allowing concurrent direct writes means
|
|
* i_size changes wouldn't be synchronized, so
|
|
* one node could wind up truncating another
|
|
* nodes writes.
|
|
*/
|
|
if (end > i_size_read(inode)) {
|
|
*direct_io = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* We don't fill holes during direct io, so
|
|
* check for them here. If any are found, the
|
|
* caller will have to retake some cluster
|
|
* locks and initiate the io as buffered.
|
|
*/
|
|
ret = ocfs2_check_range_for_holes(inode, saved_pos, count);
|
|
if (ret == 1) {
|
|
*direct_io = 0;
|
|
ret = 0;
|
|
} else if (ret < 0)
|
|
mlog_errno(ret);
|
|
break;
|
|
}
|
|
|
|
if (appending)
|
|
*ppos = saved_pos;
|
|
|
|
out_unlock:
|
|
ocfs2_inode_unlock(inode, meta_level);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t pos)
|
|
{
|
|
int ret, direct_io, appending, rw_level, have_alloc_sem = 0;
|
|
int can_do_direct;
|
|
ssize_t written = 0;
|
|
size_t ocount; /* original count */
|
|
size_t count; /* after file limit checks */
|
|
loff_t old_size, *ppos = &iocb->ki_pos;
|
|
u32 old_clusters;
|
|
struct file *file = iocb->ki_filp;
|
|
struct inode *inode = file->f_path.dentry->d_inode;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
mlog_entry("(0x%p, %u, '%.*s')\n", file,
|
|
(unsigned int)nr_segs,
|
|
file->f_path.dentry->d_name.len,
|
|
file->f_path.dentry->d_name.name);
|
|
|
|
if (iocb->ki_left == 0)
|
|
return 0;
|
|
|
|
vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
|
|
|
|
appending = file->f_flags & O_APPEND ? 1 : 0;
|
|
direct_io = file->f_flags & O_DIRECT ? 1 : 0;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
relock:
|
|
/* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
|
|
if (direct_io) {
|
|
down_read(&inode->i_alloc_sem);
|
|
have_alloc_sem = 1;
|
|
}
|
|
|
|
/* concurrent O_DIRECT writes are allowed */
|
|
rw_level = !direct_io;
|
|
ret = ocfs2_rw_lock(inode, rw_level);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_sems;
|
|
}
|
|
|
|
can_do_direct = direct_io;
|
|
ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos,
|
|
iocb->ki_left, appending,
|
|
&can_do_direct);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* We can't complete the direct I/O as requested, fall back to
|
|
* buffered I/O.
|
|
*/
|
|
if (direct_io && !can_do_direct) {
|
|
ocfs2_rw_unlock(inode, rw_level);
|
|
up_read(&inode->i_alloc_sem);
|
|
|
|
have_alloc_sem = 0;
|
|
rw_level = -1;
|
|
|
|
direct_io = 0;
|
|
goto relock;
|
|
}
|
|
|
|
/*
|
|
* To later detect whether a journal commit for sync writes is
|
|
* necessary, we sample i_size, and cluster count here.
|
|
*/
|
|
old_size = i_size_read(inode);
|
|
old_clusters = OCFS2_I(inode)->ip_clusters;
|
|
|
|
/* communicate with ocfs2_dio_end_io */
|
|
ocfs2_iocb_set_rw_locked(iocb, rw_level);
|
|
|
|
if (direct_io) {
|
|
ret = generic_segment_checks(iov, &nr_segs, &ocount,
|
|
VERIFY_READ);
|
|
if (ret)
|
|
goto out_dio;
|
|
|
|
ret = generic_write_checks(file, ppos, &count,
|
|
S_ISBLK(inode->i_mode));
|
|
if (ret)
|
|
goto out_dio;
|
|
|
|
written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
|
|
ppos, count, ocount);
|
|
if (written < 0) {
|
|
/*
|
|
* direct write may have instantiated a few
|
|
* blocks outside i_size. Trim these off again.
|
|
* Don't need i_size_read because we hold i_mutex.
|
|
*/
|
|
if (*ppos + count > inode->i_size)
|
|
vmtruncate(inode, inode->i_size);
|
|
ret = written;
|
|
goto out_dio;
|
|
}
|
|
} else {
|
|
written = generic_file_aio_write_nolock(iocb, iov, nr_segs,
|
|
*ppos);
|
|
}
|
|
|
|
out_dio:
|
|
/* buffered aio wouldn't have proper lock coverage today */
|
|
BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
|
|
|
|
if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) {
|
|
/*
|
|
* The generic write paths have handled getting data
|
|
* to disk, but since we don't make use of the dirty
|
|
* inode list, a manual journal commit is necessary
|
|
* here.
|
|
*/
|
|
if (old_size != i_size_read(inode) ||
|
|
old_clusters != OCFS2_I(inode)->ip_clusters) {
|
|
ret = jbd2_journal_force_commit(osb->journal->j_journal);
|
|
if (ret < 0)
|
|
written = ret;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
|
|
* function pointer which is called when o_direct io completes so that
|
|
* it can unlock our rw lock. (it's the clustered equivalent of
|
|
* i_alloc_sem; protects truncate from racing with pending ios).
|
|
* Unfortunately there are error cases which call end_io and others
|
|
* that don't. so we don't have to unlock the rw_lock if either an
|
|
* async dio is going to do it in the future or an end_io after an
|
|
* error has already done it.
|
|
*/
|
|
if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
|
|
rw_level = -1;
|
|
have_alloc_sem = 0;
|
|
}
|
|
|
|
out:
|
|
if (rw_level != -1)
|
|
ocfs2_rw_unlock(inode, rw_level);
|
|
|
|
out_sems:
|
|
if (have_alloc_sem)
|
|
up_read(&inode->i_alloc_sem);
|
|
|
|
mutex_unlock(&inode->i_mutex);
|
|
|
|
mlog_exit(ret);
|
|
return written ? written : ret;
|
|
}
|
|
|
|
static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
|
|
struct file *out,
|
|
loff_t *ppos,
|
|
size_t len,
|
|
unsigned int flags)
|
|
{
|
|
int ret;
|
|
struct inode *inode = out->f_path.dentry->d_inode;
|
|
|
|
mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe,
|
|
(unsigned int)len,
|
|
out->f_path.dentry->d_name.len,
|
|
out->f_path.dentry->d_name.name);
|
|
|
|
inode_double_lock(inode, pipe->inode);
|
|
|
|
ret = ocfs2_rw_lock(inode, 1);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, ppos, len, 0,
|
|
NULL);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_unlock;
|
|
}
|
|
|
|
ret = generic_file_splice_write_nolock(pipe, out, ppos, len, flags);
|
|
|
|
out_unlock:
|
|
ocfs2_rw_unlock(inode, 1);
|
|
out:
|
|
inode_double_unlock(inode, pipe->inode);
|
|
|
|
mlog_exit(ret);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ocfs2_file_splice_read(struct file *in,
|
|
loff_t *ppos,
|
|
struct pipe_inode_info *pipe,
|
|
size_t len,
|
|
unsigned int flags)
|
|
{
|
|
int ret = 0;
|
|
struct inode *inode = in->f_path.dentry->d_inode;
|
|
|
|
mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe,
|
|
(unsigned int)len,
|
|
in->f_path.dentry->d_name.len,
|
|
in->f_path.dentry->d_name.name);
|
|
|
|
/*
|
|
* See the comment in ocfs2_file_aio_read()
|
|
*/
|
|
ret = ocfs2_inode_lock(inode, NULL, 0);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
ocfs2_inode_unlock(inode, 0);
|
|
|
|
ret = generic_file_splice_read(in, ppos, pipe, len, flags);
|
|
|
|
bail:
|
|
mlog_exit(ret);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t ocfs2_file_aio_read(struct kiocb *iocb,
|
|
const struct iovec *iov,
|
|
unsigned long nr_segs,
|
|
loff_t pos)
|
|
{
|
|
int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0;
|
|
struct file *filp = iocb->ki_filp;
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
|
|
|
mlog_entry("(0x%p, %u, '%.*s')\n", filp,
|
|
(unsigned int)nr_segs,
|
|
filp->f_path.dentry->d_name.len,
|
|
filp->f_path.dentry->d_name.name);
|
|
|
|
if (!inode) {
|
|
ret = -EINVAL;
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* buffered reads protect themselves in ->readpage(). O_DIRECT reads
|
|
* need locks to protect pending reads from racing with truncate.
|
|
*/
|
|
if (filp->f_flags & O_DIRECT) {
|
|
down_read(&inode->i_alloc_sem);
|
|
have_alloc_sem = 1;
|
|
|
|
ret = ocfs2_rw_lock(inode, 0);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
rw_level = 0;
|
|
/* communicate with ocfs2_dio_end_io */
|
|
ocfs2_iocb_set_rw_locked(iocb, rw_level);
|
|
}
|
|
|
|
/*
|
|
* We're fine letting folks race truncates and extending
|
|
* writes with read across the cluster, just like they can
|
|
* locally. Hence no rw_lock during read.
|
|
*
|
|
* Take and drop the meta data lock to update inode fields
|
|
* like i_size. This allows the checks down below
|
|
* generic_file_aio_read() a chance of actually working.
|
|
*/
|
|
ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto bail;
|
|
}
|
|
ocfs2_inode_unlock(inode, lock_level);
|
|
|
|
ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
|
|
if (ret == -EINVAL)
|
|
mlog(0, "generic_file_aio_read returned -EINVAL\n");
|
|
|
|
/* buffered aio wouldn't have proper lock coverage today */
|
|
BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));
|
|
|
|
/* see ocfs2_file_aio_write */
|
|
if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
|
|
rw_level = -1;
|
|
have_alloc_sem = 0;
|
|
}
|
|
|
|
bail:
|
|
if (have_alloc_sem)
|
|
up_read(&inode->i_alloc_sem);
|
|
if (rw_level != -1)
|
|
ocfs2_rw_unlock(inode, rw_level);
|
|
mlog_exit(ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
const struct inode_operations ocfs2_file_iops = {
|
|
.setattr = ocfs2_setattr,
|
|
.getattr = ocfs2_getattr,
|
|
.permission = ocfs2_permission,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.listxattr = ocfs2_listxattr,
|
|
.removexattr = generic_removexattr,
|
|
.fallocate = ocfs2_fallocate,
|
|
.fiemap = ocfs2_fiemap,
|
|
};
|
|
|
|
const struct inode_operations ocfs2_special_file_iops = {
|
|
.setattr = ocfs2_setattr,
|
|
.getattr = ocfs2_getattr,
|
|
.permission = ocfs2_permission,
|
|
};
|
|
|
|
/*
|
|
* Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
|
|
* ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
|
|
*/
|
|
const struct file_operations ocfs2_fops = {
|
|
.llseek = generic_file_llseek,
|
|
.read = do_sync_read,
|
|
.write = do_sync_write,
|
|
.mmap = ocfs2_mmap,
|
|
.fsync = ocfs2_sync_file,
|
|
.release = ocfs2_file_release,
|
|
.open = ocfs2_file_open,
|
|
.aio_read = ocfs2_file_aio_read,
|
|
.aio_write = ocfs2_file_aio_write,
|
|
.unlocked_ioctl = ocfs2_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ocfs2_compat_ioctl,
|
|
#endif
|
|
.lock = ocfs2_lock,
|
|
.flock = ocfs2_flock,
|
|
.splice_read = ocfs2_file_splice_read,
|
|
.splice_write = ocfs2_file_splice_write,
|
|
};
|
|
|
|
const struct file_operations ocfs2_dops = {
|
|
.llseek = generic_file_llseek,
|
|
.read = generic_read_dir,
|
|
.readdir = ocfs2_readdir,
|
|
.fsync = ocfs2_sync_file,
|
|
.release = ocfs2_dir_release,
|
|
.open = ocfs2_dir_open,
|
|
.unlocked_ioctl = ocfs2_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ocfs2_compat_ioctl,
|
|
#endif
|
|
.lock = ocfs2_lock,
|
|
.flock = ocfs2_flock,
|
|
};
|
|
|
|
/*
|
|
* POSIX-lockless variants of our file_operations.
|
|
*
|
|
* These will be used if the underlying cluster stack does not support
|
|
* posix file locking, if the user passes the "localflocks" mount
|
|
* option, or if we have a local-only fs.
|
|
*
|
|
* ocfs2_flock is in here because all stacks handle UNIX file locks,
|
|
* so we still want it in the case of no stack support for
|
|
* plocks. Internally, it will do the right thing when asked to ignore
|
|
* the cluster.
|
|
*/
|
|
const struct file_operations ocfs2_fops_no_plocks = {
|
|
.llseek = generic_file_llseek,
|
|
.read = do_sync_read,
|
|
.write = do_sync_write,
|
|
.mmap = ocfs2_mmap,
|
|
.fsync = ocfs2_sync_file,
|
|
.release = ocfs2_file_release,
|
|
.open = ocfs2_file_open,
|
|
.aio_read = ocfs2_file_aio_read,
|
|
.aio_write = ocfs2_file_aio_write,
|
|
.unlocked_ioctl = ocfs2_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ocfs2_compat_ioctl,
|
|
#endif
|
|
.flock = ocfs2_flock,
|
|
.splice_read = ocfs2_file_splice_read,
|
|
.splice_write = ocfs2_file_splice_write,
|
|
};
|
|
|
|
const struct file_operations ocfs2_dops_no_plocks = {
|
|
.llseek = generic_file_llseek,
|
|
.read = generic_read_dir,
|
|
.readdir = ocfs2_readdir,
|
|
.fsync = ocfs2_sync_file,
|
|
.release = ocfs2_dir_release,
|
|
.open = ocfs2_dir_open,
|
|
.unlocked_ioctl = ocfs2_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ocfs2_compat_ioctl,
|
|
#endif
|
|
.flock = ocfs2_flock,
|
|
};
|