Release 4.10 fs/ocfs2/file.c

Directory: fs/ocfs2
/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * file.c
 *
 * File open, close, extend, truncate
 *
 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#include <linux/capability.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/pagemap.h>
#include <linux/uio.h>
#include <linux/sched.h>
#include <linux/splice.h>
#include <linux/mount.h>
#include <linux/writeback.h>
#include <linux/falloc.h>
#include <linux/quotaops.h>
#include <linux/blkdev.h>
#include <linux/backing-dev.h>

#include <cluster/masklog.h>

#include "ocfs2.h"

#include "alloc.h"
#include "aops.h"
#include "dir.h"
#include "dlmglue.h"
#include "extent_map.h"
#include "file.h"
#include "sysfile.h"
#include "inode.h"
#include "ioctl.h"
#include "journal.h"
#include "locks.h"
#include "mmap.h"
#include "suballoc.h"
#include "super.h"
#include "xattr.h"
#include "acl.h"
#include "quota.h"
#include "refcounttree.h"
#include "ocfs2_trace.h"

#include "buffer_head_io.h"



static int ocfs2_init_file_private(struct inode *inode, struct file *file)
{
	struct ocfs2_file_private *fp;

	fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
	if (!fp)
		return -ENOMEM;

	fp->fp_file = file;
	mutex_init(&fp->fp_mutex);
	ocfs2_file_lock_res_init(&fp->fp_flock, fp);
	file->private_data = fp;

	return 0;
}

Contributors
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mark fasheh mark fasheh 76 100.00% 1 100.00%
Total 76 100.00% 1 100.00%



static void ocfs2_free_file_private(struct inode *inode, struct file *file)
{
	struct ocfs2_file_private *fp = file->private_data;
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);

	if (fp) {
		ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
		ocfs2_lock_res_free(&fp->fp_flock);
		kfree(fp);
		file->private_data = NULL;
	}
}

Contributors
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mark fasheh mark fasheh 72 100.00% 1 100.00%
Total 72 100.00% 1 100.00%



static int ocfs2_file_open(struct inode *inode, struct file *file)
{
	int status;
	int mode = file->f_flags;
	struct ocfs2_inode_info *oi = OCFS2_I(inode);

	trace_ocfs2_file_open(inode, file, file->f_path.dentry,
			      (unsigned long long)OCFS2_I(inode)->ip_blkno,
			      file->f_path.dentry->d_name.len,
			      file->f_path.dentry->d_name.name, mode);

	if (file->f_mode & FMODE_WRITE) {
		status = dquot_initialize(inode);
		if (status)
			goto leave;
	}

	spin_lock(&oi->ip_lock);

	/* Check that the inode hasn't been wiped from disk by another
         * node. If it hasn't then we're safe as long as we hold the
         * spin lock until our increment of open count. */
	if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
		spin_unlock(&oi->ip_lock);

		status = -ENOENT;
		goto leave;
	}

	if (mode & O_DIRECT)
		oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;

	oi->ip_open_count++;
	spin_unlock(&oi->ip_lock);

	status = ocfs2_init_file_private(inode, file);
	if (status) {
		/*
                 * We want to set open count back if we're failing the
                 * open.
                 */
		spin_lock(&oi->ip_lock);
		oi->ip_open_count--;
		spin_unlock(&oi->ip_lock);
	}

leave:
	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 161 75.94% 2 28.57%
tao ma tao ma 21 9.91% 1 14.29%
christoph hellwig christoph hellwig 13 6.13% 2 28.57%
jan kara jan kara 11 5.19% 1 14.29%
josef sipek josef sipek 6 2.83% 1 14.29%
Total 212 100.00% 7 100.00%



static int ocfs2_file_release(struct inode *inode, struct file *file)
{
	struct ocfs2_inode_info *oi = OCFS2_I(inode);

	spin_lock(&oi->ip_lock);
	if (!--oi->ip_open_count)
		oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;

	trace_ocfs2_file_release(inode, file, file->f_path.dentry,
				 oi->ip_blkno,
				 file->f_path.dentry->d_name.len,
				 file->f_path.dentry->d_name.name,
				 oi->ip_open_count);
	spin_unlock(&oi->ip_lock);

	ocfs2_free_file_private(inode, file);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 66 61.11% 2 50.00%
tao ma tao ma 36 33.33% 1 25.00%
josef sipek josef sipek 6 5.56% 1 25.00%
Total 108 100.00% 4 100.00%



static int ocfs2_dir_open(struct inode *inode, struct file *file)
{
	return ocfs2_init_file_private(inode, file);
}

Contributors
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mark fasheh mark fasheh 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static int ocfs2_dir_release(struct inode *inode, struct file *file)
{
	ocfs2_free_file_private(inode, file);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end,
			   int datasync)
{
	int err = 0;
	struct inode *inode = file->f_mapping->host;
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct ocfs2_inode_info *oi = OCFS2_I(inode);
	journal_t *journal = osb->journal->j_journal;
	int ret;
	tid_t commit_tid;
	bool needs_barrier = false;

	trace_ocfs2_sync_file(inode, file, file->f_path.dentry,
			      OCFS2_I(inode)->ip_blkno,
			      file->f_path.dentry->d_name.len,
			      file->f_path.dentry->d_name.name,
			      (unsigned long long)datasync);

	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
		return -EROFS;

	err = filemap_write_and_wait_range(inode->i_mapping, start, end);
	if (err)
		return err;

	commit_tid = datasync ? oi->i_datasync_tid : oi->i_sync_tid;
	if (journal->j_flags & JBD2_BARRIER &&
	    !jbd2_trans_will_send_data_barrier(journal, commit_tid))
		needs_barrier = true;
	err = jbd2_complete_transaction(journal, commit_tid);
	if (needs_barrier) {
		ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
		if (!err)
			err = ret;
	}

	if (err)
		mlog_errno(err);

	return (err < 0) ? -EIO : 0;
}

Contributors
Person Tokens Prop Commits CommitProp
darrick j. wong darrick j. wong 76 29.92% 1 10.00%
mark fasheh mark fasheh 74 29.13% 1 10.00%
josef bacik josef bacik 28 11.02% 1 10.00%
tao ma tao ma 21 8.27% 2 20.00%
younger liu younger liu 16 6.30% 1 10.00%
jan kara jan kara 16 6.30% 1 10.00%
joel becker joel becker 14 5.51% 1 10.00%
hisashi hifumi hisashi hifumi 5 1.97% 1 10.00%
christoph hellwig christoph hellwig 4 1.57% 1 10.00%
Total 254 100.00% 10 100.00%



int ocfs2_should_update_atime(struct inode *inode,
			      struct vfsmount *vfsmnt)
{
	struct timespec now;
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);

	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
		return 0;

	if ((inode->i_flags & S_NOATIME) ||
	    ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode)))
		return 0;

	/*
         * We can be called with no vfsmnt structure - NFSD will
         * sometimes do this.
         *
         * Note that our action here is different than touch_atime() -
         * if we can't tell whether this is a noatime mount, then we
         * don't know whether to trust the value of s_atime_quantum.
         */
	if (vfsmnt == NULL)
		return 0;

	if ((vfsmnt->mnt_flags & MNT_NOATIME) ||
	    ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
		return 0;

	if (vfsmnt->mnt_flags & MNT_RELATIME) {
		if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) ||
		    (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0))
			return 1;

		return 0;
	}

	now = current_time(inode);
	if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum))
		return 0;
	else
		return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
tiger yang tiger yang 136 67.33% 1 25.00%
mark fasheh mark fasheh 62 30.69% 2 50.00%
deepa dinamani deepa dinamani 4 1.98% 1 25.00%
Total 202 100.00% 4 100.00%



int ocfs2_update_inode_atime(struct inode *inode,
			     struct buffer_head *bh)
{
	int ret;
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	handle_t *handle;
	struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;

	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_CACHE(inode), bh,
				      OCFS2_JOURNAL_ACCESS_WRITE);
	if (ret) {
		mlog_errno(ret);
		goto out_commit;
	}

	/*
         * Don't use ocfs2_mark_inode_dirty() here as we don't always
         * have i_mutex to guard against concurrent changes to other
         * inode fields.
         */
	inode->i_atime = current_time(inode);
	di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
	di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
	ocfs2_update_inode_fsync_trans(handle, inode, 0);
	ocfs2_journal_dirty(handle, bh);

out_commit:
	ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
tiger yang tiger yang 88 48.35% 1 14.29%
mark fasheh mark fasheh 70 38.46% 1 14.29%
darrick j. wong darrick j. wong 9 4.95% 1 14.29%
jan kara jan kara 7 3.85% 1 14.29%
joel becker joel becker 4 2.20% 2 28.57%
deepa dinamani deepa dinamani 4 2.20% 1 14.29%
Total 182 100.00% 7 100.00%



int ocfs2_set_inode_size(handle_t *handle,
				struct inode *inode,
				struct buffer_head *fe_bh,
				u64 new_i_size)
{
	int status;

	i_size_write(inode, new_i_size);
	inode->i_blocks = ocfs2_inode_sector_count(inode);
	inode->i_ctime = inode->i_mtime = current_time(inode);

	status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
	if (status < 0) {
		mlog_errno(status);
		goto bail;
	}

bail:
	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 82 95.35% 3 75.00%
deepa dinamani deepa dinamani 4 4.65% 1 25.00%
Total 86 100.00% 4 100.00%



int ocfs2_simple_size_update(struct inode *inode,
			     struct buffer_head *di_bh,
			     u64 new_i_size)
{
	int ret;
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	handle_t *handle = NULL;

	handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
	if (IS_ERR(handle)) {
		ret = PTR_ERR(handle);
		mlog_errno(ret);
		goto out;
	}

	ret = ocfs2_set_inode_size(handle, inode, di_bh,
				   new_i_size);
	if (ret < 0)
		mlog_errno(ret);

	ocfs2_update_inode_fsync_trans(handle, inode, 0);
	ocfs2_commit_trans(osb, handle);
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 101 86.32% 3 60.00%
darrick j. wong darrick j. wong 9 7.69% 1 20.00%
jan kara jan kara 7 5.98% 1 20.00%
Total 117 100.00% 5 100.00%



static int ocfs2_cow_file_pos(struct inode *inode,
			      struct buffer_head *fe_bh,
			      u64 offset)
{
	int status;
	u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
	unsigned int num_clusters = 0;
	unsigned int ext_flags = 0;

	/*
         * If the new offset is aligned to the range of the cluster, there is
         * no space for ocfs2_zero_range_for_truncate to fill, so no need to
         * CoW either.
         */
	if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0)
		return 0;

	status = ocfs2_get_clusters(inode, cpos, &phys,
				    &num_clusters, &ext_flags);
	if (status) {
		mlog_errno(status);
		goto out;
	}

	if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
		goto out;

	return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1);

out:
	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
tao ma tao ma 140 100.00% 1 100.00%
Total 140 100.00% 1 100.00%



static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb,
				     struct inode *inode,
				     struct buffer_head *fe_bh,
				     u64 new_i_size)
{
	int status;
	handle_t *handle;
	struct ocfs2_dinode *di;
	u64 cluster_bytes;

	/*
         * We need to CoW the cluster contains the offset if it is reflinked
         * since we will call ocfs2_zero_range_for_truncate later which will
         * write "0" from offset to the end of the cluster.
         */
	status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size);
	if (status) {
		mlog_errno(status);
		return status;
	}

	/* TODO: This needs to actually orphan the inode in this
         * transaction. */

	handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
	if (IS_ERR(handle)) {
		status = PTR_ERR(handle);
		mlog_errno(status);
		goto out;
	}

	status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
					 OCFS2_JOURNAL_ACCESS_WRITE);
	if (status < 0) {
		mlog_errno(status);
		goto out_commit;
	}

	/*
         * Do this before setting i_size.
         */
	cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
	status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
					       cluster_bytes);
	if (status) {
		mlog_errno(status);
		goto out_commit;
	}

	i_size_write(inode, new_i_size);
	inode->i_ctime = inode->i_mtime = current_time(inode);

	di = (struct ocfs2_dinode *) fe_bh->b_data;
	di->i_size = cpu_to_le64(new_i_size);
	di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec);
	di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
	ocfs2_update_inode_fsync_trans(handle, inode, 0);

	ocfs2_journal_dirty(handle, fe_bh);

out_commit:
	ocfs2_commit_trans(osb, handle);
out:
	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 231 84.31% 5 50.00%
tao ma tao ma 26 9.49% 1 10.00%
darrick j. wong darrick j. wong 9 3.28% 1 10.00%
joel becker joel becker 4 1.46% 2 20.00%
deepa dinamani deepa dinamani 4 1.46% 1 10.00%
Total 274 100.00% 10 100.00%



int ocfs2_truncate_file(struct inode *inode,
			       struct buffer_head *di_bh,
			       u64 new_i_size)
{
	int status = 0;
	struct ocfs2_dinode *fe = NULL;
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);

	/* We trust di_bh because it comes from ocfs2_inode_lock(), which
         * already validated it */
	fe = (struct ocfs2_dinode *) di_bh->b_data;

	trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno,
				  (unsigned long long)le64_to_cpu(fe->i_size),
				  (unsigned long long)new_i_size);

	mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
			"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)) {
		trace_ocfs2_truncate_file_error(
			(unsigned long long)le64_to_cpu(fe->i_size),
			(unsigned long long)new_i_size);
		status = -EINVAL;
		mlog_errno(status);
		goto bail;
	}

	down_write(&OCFS2_I(inode)->ip_alloc_sem);

	ocfs2_resv_discard(&osb->osb_la_resmap,
			   &OCFS2_I(inode)->ip_la_data_resv);

	/*
         * 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_commit_truncate(osb, inode, di_bh);
	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:
	if (!status && OCFS2_I(inode)->ip_clusters == 0)
		status = ocfs2_try_remove_refcount_tree(inode, di_bh);

	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 338 87.56% 8 80.00%
tao ma tao ma 48 12.44% 2 20.00%
Total 386 100.00% 10 100.00%

/*
 * 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_CACHE(inode), fe_bh);
	ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset,
					  clusters_to_add, mark_unwritten,
					  data_ac, meta_ac, reason_ret);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 60 63.83% 5 45.45%
joel becker joel becker 25 26.60% 4 36.36%
tao ma tao ma 9 9.57% 2 18.18%
Total 94 100.00% 11 100.00%



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 = RESTART_NONE;
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct ocfs2_extent_tree et;
	int did_quota = 0;

	/*
         * Unwritten extent only exists for file systems which
         * 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);

	ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(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);
	handle = ocfs2_start_trans(osb, credits);
	if (IS_ERR(handle)) {
		status = PTR_ERR(handle);
		handle = NULL;
		mlog_errno(status);
		goto leave;
	}

restarted_transaction:
	trace_ocfs2_extend_allocation(
		(unsigned long long)OCFS2_I(inode)->ip_blkno,
		(unsigned long long)i_size_read(inode),
		le32_to_cpu(fe->i_clusters), clusters_to_add,
		why, restart_func);

	status = dquot_alloc_space_nodirty(inode,
			ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
	if (status)
		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_CACHE(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;
	}
	ocfs2_update_inode_fsync_trans(handle, inode, 1);
	ocfs2_journal_dirty(handle, bh);

	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 */
	dquot_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) {
			restart_func = 1;
			status = 0;
		} else {
			BUG_ON(why != RESTART_TRANS);

			status = ocfs2_allocate_extend_trans(handle, 1);
			if (status < 0) {
				/* handle still has to be committed at
                                 * this point. */
				status = -ENOMEM;
				mlog_errno(status);
				goto leave;
			}
			goto restarted_transaction;
		}
	}

	trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno,
	     le32_to_cpu(fe->i_clusters),
	     (unsigned long long)le64_to_cpu(fe->i_size),
	     OCFS2_I(inode)->ip_clusters,
	     (unsigned long long)i_size_read(inode));

leave:
	if (status < 0 && did_quota)
		dquot_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;

	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 545 75.69% 9 32.14%
jan kara jan kara 68 9.44% 2 7.14%
tao ma tao ma 58 8.06% 5 17.86%
joel becker joel becker 26 3.61% 7 25.00%
darrick j. wong darrick j. wong 9 1.25% 1 3.57%
christoph hellwig christoph hellwig 9 1.25% 1 3.57%
junxiao bi junxiao bi 3 0.42% 2 7.14%
younger liu younger liu 2 0.28% 1 3.57%
Total 720 100.00% 28 100.00%



int ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
		u32 clusters_to_add, int mark_unwritten)
{
	return __ocfs2_extend_allocation(inode, logical_start,
			clusters_to_add, mark_unwritten);
}

Contributors
Person Tokens Prop Commits CommitProp
joseph qi joseph qi 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%

/*
 * While a write will already be ordering the data, a truncate will not.
 * Thus, we need to explicitly order the zeroed pages.
 */


static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode,
						struct buffer_head *di_bh)
{
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	handle_t *handle = NULL;
	int ret = 0;

	if (!ocfs2_should_order_data(inode))
		goto out;

	handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
	if (IS_ERR(handle)) {
		ret = -ENOMEM;
		mlog_errno(ret);
		goto out;
	}

	ret = ocfs2_jbd2_file_inode(handle, inode);
	if (ret < 0) {
		mlog_errno(ret);
		goto out;
	}

	ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
				      OCFS2_JOURNAL_ACCESS_WRITE);
	if (ret)
		mlog_errno(ret);
	ocfs2_update_inode_fsync_trans(handle, inode, 1);

out:
	if (ret) {
		if (!IS_ERR(handle))
			ocfs2_commit_trans(osb, handle);
		handle = ERR_PTR(ret);
	}
	return handle;
}

Contributors
Person Tokens Prop Commits CommitProp
joel becker joel becker 130 74.71% 1 33.33%
junxiao bi junxiao bi 35 20.11% 1 33.33%
darrick j. wong darrick j. wong 9 5.17% 1 33.33%
Total 174 100.00% 3 100.00%

/* 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 abs_from,
				 u64 abs_to, struct buffer_head *di_bh)
{
	struct address_space *mapping = inode->i_mapping;
	struct page *page;
	unsigned long index = abs_from >> PAGE_SHIFT;
	handle_t *handle;
	int ret = 0;
	unsigned zero_from, zero_to, block_start, block_end;
	struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;

	BUG_ON(abs_from >= abs_to);
	BUG_ON(abs_to > (((u64)index + 1) << PAGE_SHIFT));
	BUG_ON(abs_from & (inode->i_blkbits - 1));

	handle = ocfs2_zero_start_ordered_transaction(inode, di_bh);
	if (IS_ERR(handle)) {
		ret = PTR_ERR(handle);
		goto out;
	}

	page = find_or_create_page(mapping, index, GFP_NOFS);
	if (!page) {
		ret = -ENOMEM;
		mlog_errno(ret);
		goto out_commit_trans;
	}

	/* Get the offsets within the page that we want to zero */
	zero_from = abs_from & (PAGE_SIZE - 1);
	zero_to = abs_to & (PAGE_SIZE - 1);
	if (!zero_to)
		zero_to = PAGE_SIZE;

	trace_ocfs2_write_zero_page(
			(unsigned long long)OCFS2_I(inode)->ip_blkno,
			(unsigned long long)abs_from,
			(unsigned long long)abs_to,
			index, zero_from, zero_to);

	/* We know that zero_from is block aligned */
	for (block_start = zero_from; block_start < zero_to;
	     block_start = block_end) {
		block_end = block_start + (1 << inode->i_blkbits);

		/*
                 * block_start is block-aligned.  Bump it by one to force
                 * __block_write_begin and block_commit_write to zero the
                 * whole block.
                 */
		ret = __block_write_begin(page, block_start + 1, 0,
					  ocfs2_get_block);
		if (ret < 0) {
			mlog_errno(ret);
			goto out_unlock;
		}


		/* must not update i_size! */
		ret = block_commit_write(page, block_start + 1,
					 block_start + 1);
		if (ret < 0)
			mlog_errno(ret);
		else
			ret = 0;
	}

	/*
         * fs-writeback will release the dirty pages without page lock
         * whose offset are over inode size, the release happens at
         * block_write_full_page().
         */
	i_size_write(inode, abs_to);
	inode->i_blocks = ocfs2_inode_sector_count(inode);
	di->i_size = cpu_to_le64((u64)i_size_read(inode));
	inode->i_mtime = inode->i_ctime = current_time(inode);
	di->i_mtime = di->i_ctime = cpu_to_le64(inode->i_mtime.tv_sec);
	di->i_ctime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
	di->i_mtime_nsec = di->i_ctime_nsec;
	if (handle) {
		ocfs2_journal_dirty(handle, di_bh);
		ocfs2_update_inode_fsync_trans(handle, inode, 1);
	}

out_unlock:
	unlock_page(page);
	put_page(page);
out_commit_trans:
	if (handle)
		ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
joel becker joel becker 179 38.00% 3 23.08%
junxiao bi junxiao bi 158 33.55% 2 15.38%
mark fasheh mark fasheh 95 20.17% 2 15.38%
tao ma tao ma 12 2.55% 1 7.69%
darrick j. wong darrick j. wong 9 1.91% 1 7.69%
kirill a. shutemov kirill a. shutemov 6 1.27% 1 7.69%
christoph hellwig christoph hellwig 5 1.06% 1 7.69%
deepa dinamani deepa dinamani 4 0.85% 1 7.69%
jan kara jan kara 3 0.64% 1 7.69%
Total 471 100.00% 13 100.00%

/*
 * Find the next range to zero.  We do this in terms of bytes because
 * that's what ocfs2_zero_extend() wants, and it is dealing with the
 * pagecache.  We may return multiple extents.
 *
 * zero_start and zero_end are ocfs2_zero_extend()s current idea of what
 * needs to be zeroed.  range_start and range_end return the next zeroing
 * range.  A subsequent call should pass the previous range_end as its
 * zero_start.  If range_end is 0, there's nothing to do.
 *
 * Unwritten extents are skipped over.  Refcounted extents are CoWd.
 */


static int ocfs2_zero_extend_get_range(struct inode *inode,
				       struct buffer_head *di_bh,
				       u64 zero_start, u64 zero_end,
				       u64 *range_start, u64 *range_end)
{
	int rc = 0, needs_cow = 0;
	u32 p_cpos, zero_clusters = 0;
	u32 zero_cpos =
		zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
	u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end);
	unsigned int num_clusters = 0;
	unsigned int ext_flags = 0;

	while (zero_cpos < last_cpos) {
		rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos,
					&num_clusters, &ext_flags);
		if (rc) {
			mlog_errno(rc);
			goto out;
		}

		if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) {
			zero_clusters = num_clusters;
			if (ext_flags & OCFS2_EXT_REFCOUNTED)
				needs_cow = 1;
			break;
		}

		zero_cpos += num_clusters;
	}
	if (!zero_clusters) {
		*range_end = 0;
		goto out;
	}

	while ((zero_cpos + zero_clusters) < last_cpos) {
		rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters,
					&p_cpos, &num_clusters,
					&ext_flags);
		if (rc) {
			mlog_errno(rc);
			goto out;
		}

		if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN))
			break;
		if (ext_flags & OCFS2_EXT_REFCOUNTED)
			needs_cow = 1;
		zero_clusters += num_clusters;
	}
	if ((zero_cpos + zero_clusters) > last_cpos)
		zero_clusters = last_cpos - zero_cpos;

	if (needs_cow) {
		rc = ocfs2_refcount_cow(inode, di_bh, zero_cpos,
					zero_clusters, UINT_MAX);
		if (rc) {
			mlog_errno(rc);
			goto out;
		}
	}

	*range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos);
	*range_end = ocfs2_clusters_to_bytes(inode->i_sb,
					     zero_cpos + zero_clusters);

out:
	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
joel becker joel becker 325 100.00% 1 100.00%
Total 325 100.00% 1 100.00%

/*
 * Zero one range returned from ocfs2_zero_extend_get_range().  The caller
 * has made sure that the entire range needs zeroing.
 */


static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start,
				   u64 range_end, struct buffer_head *di_bh)
{
	int rc = 0;
	u64 next_pos;
	u64 zero_pos = range_start;

	trace_ocfs2_zero_extend_range(
			(unsigned long long)OCFS2_I(inode)->ip_blkno,
			(unsigned long long)range_start,
			(unsigned long long)range_end);
	BUG_ON(range_start >= range_end);

	while (zero_pos < range_end) {
		next_pos = (zero_pos & PAGE_MASK) + PAGE_SIZE;
		if (next_pos > range_end)
			next_pos = range_end;
		rc = ocfs2_write_zero_page(inode, zero_pos, next_pos, di_bh);
		if (rc < 0) {
			mlog_errno(rc);
			break;
		}
		zero_pos = next_pos;

		/*
                 * Very large extends have the potential to lock up
                 * the cpu for extended periods of time.
                 */
		cond_resched();
	}

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
joel becker joel becker 84 61.31% 2 33.33%
mark fasheh mark fasheh 32 23.36% 1 16.67%
tao ma tao ma 12 8.76% 1 16.67%
junxiao bi junxiao bi 7 5.11% 1 16.67%
kirill a. shutemov kirill a. shutemov 2 1.46% 1 16.67%
Total 137 100.00% 6 100.00%



int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh,
		      loff_t zero_to_size)
{
	int ret = 0;
	u64 zero_start, range_start = 0, range_end = 0;
	struct super_block *sb = inode->i_sb;

	zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode));
	trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno,
				(unsigned long long)zero_start,
				(unsigned long long)i_size_read(inode));
	while (zero_start < zero_to_size) {
		ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start,
						  zero_to_size,
						  &range_start,
						  &range_end);
		if (ret) {
			mlog_errno(ret);
			break;
		}
		if (!range_end)
			break;
		/* Trim the ends */
		if (range_start < zero_start)
			range_start = zero_start;
		if (range_end > zero_to_size)
			range_end = zero_to_size;

		ret = ocfs2_zero_extend_range(inode, range_start,
					      range_end, di_bh);
		if (ret) {
			mlog_errno(ret);
			break;
		}
		zero_start = range_end;
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
joel becker joel becker 103 55.68% 2 33.33%
mark fasheh mark fasheh 68 36.76% 2 33.33%
tao ma tao ma 12 6.49% 1 16.67%
junxiao bi junxiao bi 2 1.08% 1 16.67%
Total 185 100.00% 6 100.00%



int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh,
			  u64 new_i_size, u64 zero_to)
{
	int ret;
	u32 clusters_to_add;
	struct ocfs2_inode_info *oi = OCFS2_I(inode);

	/*
         * Only quota files call this without a bh, and they can't be
         * refcounted.
         */
	BUG_ON(!di_bh && ocfs2_is_refcount_inode(inode));
	BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE));

	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, di_bh, zero_to);
	if (ret < 0)
		mlog_errno(ret);

out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 123 78.34% 1 33.33%
joel becker joel becker 30 19.11% 1 33.33%
darrick j. wong darrick j. wong 4 2.55% 1 33.33%
Total 157 100.00% 3 100.00%



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));

	/*
         * 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.  We even have to hold it for sparse files because there
         * might be some tail zeroing.
         */
	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_zero_extend(inode, di_bh, new_i_size);
	else
		ret = ocfs2_extend_no_holes(inode, di_bh, 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;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 220 93.62% 7 87.50%
joel becker joel becker 15 6.38% 1 12.50%
Total 235 100.00% 8 100.00%



int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
{
	int status = 0, size_change;
	int inode_locked = 0;
	struct inode *inode = d_inode(dentry);
	struct super_block *sb = inode->i_sb;
	struct ocfs2_super *osb = OCFS2_SB(sb);
	struct buffer_head *bh = NULL;
	handle_t *handle = NULL;
	struct dquot *transfer_to[MAXQUOTAS] = { };
	int qtype;

	trace_ocfs2_setattr(inode, dentry,
			    (unsigned long long)OCFS2_I(inode)->ip_blkno,
			    dentry->d_name.len, dentry->d_name.name,
			    attr->ia_valid, attr->ia_mode,
			    from_kuid(&init_user_ns, attr->ia_uid),
			    from_kgid(&init_user_ns, attr->ia_gid));

	/* ensuring we don't even attempt to truncate a symlink */
	if (S_ISLNK(inode->i_mode))
		attr->ia_valid &= ~ATTR_SIZE;


#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))
		return 0;

	status = setattr_prepare(dentry, attr);
	if (status)
		return status;

	if (is_quota_modification(inode, attr)) {
		status = dquot_initialize(inode);
		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;
	}
	inode_locked = 1;

	if (size_change) {
		status = inode_newsize_ok(inode, attr->ia_size);
		if (status)
			goto bail_unlock;

		inode_dio_wait(inode);

		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 && !uid_eq(attr->ia_uid, inode->i_uid)) ||
	    (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
		/*
                 * Gather pointers to quota structures so that allocation /
                 * freeing of quota structures happens here and not inside
                 * dquot_transfer() where we have problems with lock ordering
                 */
		if (attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)
		    && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
		    OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
			transfer_to[USRQUOTA] = dqget(sb, make_kqid_uid(attr->ia_uid));
			if (IS_ERR(transfer_to[USRQUOTA])) {
				status = PTR_ERR(transfer_to[USRQUOTA]);
				goto bail_unlock;
			}
		}
		if (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid)
		    && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
		    OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
			transfer_to[GRPQUOTA] = dqget(sb, make_kqid_gid(attr->ia_gid));
			if (IS_ERR(transfer_to[GRPQUOTA])) {
				status = PTR_ERR(transfer_to[GRPQUOTA]);
				goto bail_unlock;
			}
		}
		handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS +
					   2 * ocfs2_quota_trans_credits(sb));
		if (IS_ERR(handle)) {
			status = PTR_ERR(handle);
			mlog_errno(status);
			goto bail_unlock;
		}
		status = __dquot_transfer(inode, transfer_to);
		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;
		}
	}

	setattr_copy(inode, attr);
	mark_inode_dirty(inode);

	status = ocfs2_mark_inode_dirty(handle, inode, bh);
	if (status < 0)
		mlog_errno(status);

bail_commit:
	ocfs2_commit_trans(osb, handle);
bail_unlock:
	if (status) {
		ocfs2_inode_unlock(inode, 1);
		inode_locked = 0;
	}
bail_unlock_rw:
	if (size_change)
		ocfs2_rw_unlock(inode, 1);
bail:

	/* Release quota pointers in case we acquired them */
	for (qtype = 0; qtype < OCFS2_MAXQUOTAS; qtype++)
		dqput(transfer_to[qtype]);

	if (!status && attr->ia_valid & ATTR_MODE) {
		status = ocfs2_acl_chmod(inode, bh);
		if (status < 0)
			mlog_errno(status);
	}
	if (inode_locked)
		ocfs2_inode_unlock(inode, 1);

	brelse(bh);
	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 380 44.29% 5 17.86%
jan kara jan kara 269 31.35% 7 25.00%
eric w. biederman eric w. biederman 38 4.43% 3 10.71%
tiger yang tiger yang 30 3.50% 1 3.57%
tariq saeed tariq saeed 30 3.50% 1 3.57%
joel becker joel becker 29 3.38% 1 3.57%
tao ma tao ma 27 3.15% 1 3.57%
christoph hellwig christoph hellwig 19 2.21% 4 14.29%
dmitriy monakhov dmitriy monakhov 14 1.63% 1 3.57%
wengang wang wengang wang 11 1.28% 1 3.57%
junxiao bi junxiao bi 7 0.82% 1 3.57%
david howells david howells 3 0.35% 1 3.57%
younger liu younger liu 1 0.12% 1 3.57%
Total 858 100.00% 28 100.00%



int ocfs2_getattr(struct vfsmount *mnt,
		  struct dentry *dentry,
		  struct kstat *stat)
{
	struct inode *inode = d_inode(dentry);
	struct super_block *sb = dentry->d_sb;
	struct ocfs2_super *osb = sb->s_fs_info;
	int err;

	err = ocfs2_inode_revalidate(dentry);
	if (err) {
		if (err != -ENOENT)
			mlog_errno(err);
		goto bail;
	}

	generic_fillattr(inode, stat);
	/*
         * If there is inline data in the inode, the inode will normally not
         * have data blocks allocated (it may have an external xattr block).
         * Report at least one sector for such files, so tools like tar, rsync,
         * others don't incorrectly think the file is completely sparse.
         */
	if (unlikely(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL))
		stat->blocks += (stat->size + 511)>>9;

	/* We set the blksize from the cluster size for performance */
	stat->blksize = osb->s_clustersize;

bail:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 95 73.64% 1 25.00%
john haxby john haxby 29 22.48% 1 25.00%
david howells david howells 4 3.10% 1 25.00%
al viro al viro 1 0.78% 1 25.00%
Total 129 100.00% 4 100.00%



int ocfs2_permission(struct inode *inode, int mask)
{
	int ret;

	if (mask & MAY_NOT_BLOCK)
		return -ECHILD;

	ret = ocfs2_inode_lock(inode, NULL, 0);
	if (ret) {
		if (ret != -ENOENT)
			mlog_errno(ret);
		goto out;
	}

	ret = generic_permission(inode, mask);

	ocfs2_inode_unlock(inode, 0);
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
tiger yang tiger yang 60 75.95% 1 20.00%
mark fasheh mark fasheh 9 11.39% 2 40.00%
nick piggin nick piggin 8 10.13% 1 20.00%
al viro al viro 2 2.53% 1 20.00%
Total 79 100.00% 5 100.00%



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;

	trace_ocfs2_write_remove_suid(
			(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_CACHE(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);
	ocfs2_update_inode_fsync_trans(handle, inode, 0);

	ocfs2_journal_dirty(handle, bh);

out_trans:
	ocfs2_commit_trans(osb, handle);
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 187 89.90% 5 50.00%
darrick j. wong darrick j. wong 9 4.33% 1 10.00%
jan kara jan kara 7 3.37% 1 10.00%
joel becker joel becker 4 1.92% 2 20.00%
tao ma tao ma 1 0.48% 1 10.00%
Total 208 100.00% 10 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 65 98.48% 1 50.00%
joel becker joel becker 1 1.52% 1 50.00%
Total 66 100.00% 2 100.00%

/*
 * 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;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 262 99.62% 2 66.67%
joel becker joel becker 1 0.38% 1 33.33%
Total 263 100.00% 3 100.00%

/*
 * 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);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 108 100.00% 1 100.00%
Total 108 100.00% 1 100.00%



static int ocfs2_zero_partial_clusters(struct inode *inode,
				       u64 start, u64 len)
{
	int ret = 0;
	u64 tmpend = 0;
	u64 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.
         */
	trace_ocfs2_zero_partial_clusters(
		(unsigned long long)OCFS2_I(inode)->ip_blkno,
		(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;
	}

	/*
         * If start is on a cluster boundary and end is somewhere in another
         * cluster, we have not COWed the cluster starting at start, unless
         * end is also within the same cluster. So, in this case, we skip this
         * first call to ocfs2_zero_range_for_truncate() truncate and move on
         * to the next one.
         */
	if ((start & (csize - 1)) != 0) {
		/*
                 * 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;

		trace_ocfs2_zero_partial_clusters_range1(
			(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);

		trace_ocfs2_zero_partial_clusters_range2(
			(unsigned long long)start, (unsigned long long)end);

		ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
		if (ret)
			mlog_errno(ret);
	}
	ocfs2_update_inode_fsync_trans(handle, inode, 1);

	ocfs2_commit_trans(osb, handle);
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 270 83.85% 1 20.00%
ashish samant ashish samant 22 6.83% 1 20.00%
tao ma tao ma 14 4.35% 1 20.00%
darrick j. wong darrick j. wong 9 2.80% 1 20.00%
jan kara jan kara 7 2.17% 1 20.00%
Total 322 100.00% 5 100.00%



static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos)
{
	int i;
	struct ocfs2_extent_rec *rec = NULL;

	for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {

		rec = &el->l_recs[i];

		if (le32_to_cpu(rec->e_cpos) < pos)
			break;
	}

	return i;
}

Contributors
Person Tokens Prop Commits CommitProp
tristan ye tristan ye 69 97.18% 1 50.00%
mark fasheh mark fasheh 2 2.82% 1 50.00%
Total 71 100.00% 2 100.00%

/*
 * Helper to calculate the punching pos and length in one run, we handle the
 * following three cases in order:
 *
 * - remove the entire record
 * - remove a partial record
 * - no record needs to be removed (hole-punching completed)
*/


static void ocfs2_calc_trunc_pos(struct inode *inode,
				 struct ocfs2_extent_list *el,
				 struct ocfs2_extent_rec *rec,
				 u32 trunc_start, u32 *trunc_cpos,
				 u32 *trunc_len, u32 *trunc_end,
				 u64 *blkno, int *done)
{
	int ret = 0;
	u32 coff, range;

	range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec);

	if (le32_to_cpu(rec->e_cpos) >= trunc_start) {
		/*
                 * remove an entire extent record.
                 */
		*trunc_cpos = le32_to_cpu(rec->e_cpos);
		/*
                 * Skip holes if any.
                 */
		if (range < *trunc_end)
			*trunc_end = range;
		*trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos);
		*blkno = le64_to_cpu(rec->e_blkno);
		*trunc_end = le32_to_cpu(rec->e_cpos);
	} else if (range > trunc_start) {
		/*
                 * remove a partial extent record, which means we're
                 * removing the last extent record.
                 */
		*trunc_cpos = trunc_start;
		/*
                 * skip hole if any.
                 */
		if (range < *trunc_end)
			*trunc_end = range;
		*trunc_len = *trunc_end - trunc_start;
		coff = trunc_start - le32_to_cpu(rec->e_cpos);
		*blkno = le64_to_cpu(rec->e_blkno) +
				ocfs2_clusters_to_blocks(inode->i_sb, coff);
		*trunc_end = trunc_start;
	} else {
		/*
                 * It may have two following possibilities:
                 *
                 * - last record has been removed
                 * - trunc_start was within a hole
                 *
                 * both two cases mean the completion of hole punching.
                 */
		ret = 1;
	}

	*done = ret;
}

Contributors
Person Tokens Prop Commits CommitProp
tristan ye tristan ye 190 84.82% 2 40.00%
mark fasheh mark fasheh 33 14.73% 2 40.00%
joel becker joel becker 1 0.45% 1 20.00%
Total 224 100.00% 5 100.00%



int ocfs2_remove_inode_range(struct inode *inode,
			     struct buffer_head *di_bh, u64 byte_start,
			     u64 byte_len)
{
	int ret = 0, flags = 0, done = 0, i;
	u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos;
	u32 cluster_in_el;
	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;
	struct ocfs2_path *path = NULL;
	struct ocfs2_extent_list *el = NULL;
	struct ocfs2_extent_rec *rec = NULL;
	struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
	u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc);

	ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh);
	ocfs2_init_dealloc_ctxt(&dealloc);

	trace_ocfs2_remove_inode_range(
			(unsigned long long)OCFS2_I(inode)->ip_blkno,
			(unsigned long long)byte_start,
			(unsigned long long)byte_len);

	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;
	}

	/*
         * For reflinks, we may need to CoW 2 clusters which might be
         * partially zero'd later, if hole's start and end offset were
         * within one cluster(means is not exactly aligned to clustersize).
         */

	if (ocfs2_is_refcount_inode(inode)) {
		ret = ocfs2_cow_file_pos(inode, di_bh, byte_start);
		if (ret) {
			mlog_errno(ret);
			goto out;
		}

		ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len);
		if (ret) {
			mlog_errno(ret);
			goto out;
		}
	}

	trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
	trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits;
	cluster_in_el = trunc_end;

	ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
	if (ret) {
		mlog_errno(ret);
		goto out;
	}

	path = ocfs2_new_path_from_et(&et);
	if (!path) {
		ret = -ENOMEM;
		mlog_errno(ret);
		goto out;
	}

	while (trunc_end > trunc_start) {

		ret = ocfs2_find_path(INODE_CACHE(inode), path,
				      cluster_in_el);
		if (ret) {
			mlog_errno(ret);
			goto out;
		}

		el = path_leaf_el(path);

		i = ocfs2_find_rec(el, trunc_end);
		/*
                 * Need to go to previous extent block.
                 */
		if (i < 0) {
			if (path->p_tree_depth == 0)
				break;

			ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb,
							    path,
							    &cluster_in_el);
			if (ret) {
				mlog_errno(ret);
				goto out;
			}

			/*
                         * We've reached the leftmost extent block,
                         * it's safe to leave.
                         */
			if (cluster_in_el == 0)
				break;

			/*
                         * The 'pos' searched for previous extent block is
                         * always one cluster less than actual trunc_end.
                         */
			trunc_end = cluster_in_el + 1;

			ocfs2_reinit_path(path, 1);

			continue;

		} else
			rec = &el->l_recs[i];

		ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos,
				     &trunc_len, &trunc_end, &blkno, &done);
		if (done)
			break;

		flags = rec->e_flags;
		phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno);

		ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos,
					       phys_cpos, trunc_len, flags,
					       &dealloc, refcount_loc, false);
		if (ret < 0) {
			mlog_errno(ret);
			goto out;
		}

		cluster_in_el = trunc_end;

		ocfs2_reinit_path(path, 1);
	}

	ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);

out:
	ocfs2_free_path(path);
	ocfs2_schedule_truncate_log_flush(osb, 1);
	ocfs2_run_deallocs(osb, &dealloc);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
tristan ye tristan ye 309 47.03% 3 25.00%
mark fasheh mark fasheh 308 46.88% 4 33.33%
tao ma tao ma 29 4.41% 1 8.33%
younger liu younger liu 5 0.76% 1 8.33%
joel becker joel becker 3 0.46% 1 8.33%
junxiao bi junxiao bi 2 0.30% 1 8.33%
darrick j. wong darrick j. wong 1 0.15% 1 8.33%
Total 657 100.00% 12 100.00%

/*
 * 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;

	inode_lock(inode);

	/*
         * 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 ||
	    cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) {
		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(inode);
	ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
	if (ret < 0)
		mlog_errno(ret);

	if (file && (file->f_flags & O_SYNC))
		handle->h_sync = 1;

	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:
	inode_unlock(inode);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 588 96.71% 5 50.00%
tariq saeed tariq saeed 8 1.32% 1 10.00%
luis henriques luis henriques 4 0.66% 1 10.00%
deepa dinamani deepa dinamani 4 0.66% 1 10.00%
al viro al viro 2 0.33% 1 10.00%
julia lawall julia lawall 2 0.33% 1 10.00%
Total 608 100.00% 10 100.00%



int ocfs2_change_file_space(struct file *file, unsigned int cmd,
			    struct ocfs2_space_resv *sr)
{
	struct inode *inode = file_inode(file);
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	int ret;

	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;

	ret = mnt_want_write_file(file);
	if (ret)
		return ret;
	ret = __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
	mnt_drop_write_file(file);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 130 81.76% 1 33.33%
jan kara jan kara 26 16.35% 1 33.33%
al viro al viro 3 1.89% 1 33.33%
Total 159 100.00% 3 100.00%



static long ocfs2_fallocate(struct file *file, int mode, loff_t offset,
			    loff_t len)
{
	struct inode *inode = file_inode(file);
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct ocfs2_space_resv sr;
	int change_size = 1;
	int cmd = OCFS2_IOC_RESVSP64;

	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
		return -EOPNOTSUPP;
	if (!ocfs2_writes_unwritten_extents(osb))
		return -EOPNOTSUPP;

	if (mode & FALLOC_FL_KEEP_SIZE)
		change_size = 0;

	if (mode & FALLOC_FL_PUNCH_HOLE)
		cmd = OCFS2_IOC_UNRESVSP64;

	sr.l_whence = 0;
	sr.l_start = (s64)offset;
	sr.l_len = (s64)len;

	return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr,
					 change_size);
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 101 70.14% 1 20.00%
christoph hellwig christoph hellwig 24 16.67% 2 40.00%
josef bacik josef bacik 16 11.11% 1 20.00%
al viro al viro 3 2.08% 1 20.00%
Total 144 100.00% 5 100.00%



int ocfs2_check_range_for_refcount(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;

	if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) ||
	    !ocfs2_is_refcount_inode(inode) ||
	    OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
		return 0;

	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 && (extent_flags & OCFS2_EXT_REFCOUNTED)) {
			ret = 1;
			break;
		}

		if (extent_len > clusters)
			extent_len = clusters;

		clusters -= extent_len;
		cpos += extent_len;
	}
out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
tao ma tao ma 155 87.08% 2 40.00%
mark fasheh mark fasheh 17 9.55% 1 20.00%
tiger yang tiger yang 5 2.81% 1 20.00%
darrick j. wong darrick j. wong 1 0.56% 1 20.00%
Total 178 100.00% 5 100.00%



static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos)
{
	int blockmask = inode->i_sb->s_blocksize - 1;
	loff_t final_size = pos + count;

	if ((pos & blockmask) || (final_size & blockmask))
		return 1;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 55 100.00% 1 100.00%
Total 55 100.00% 1 100.00%



static int ocfs2_prepare_inode_for_refcount(struct inode *inode,
					    struct file *file,
					    loff_t pos, size_t count,
					    int *meta_level)
{
	int ret;
	struct buffer_head *di_bh = NULL;
	u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
	u32 clusters =
		ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos;

	ret = ocfs2_inode_lock(inode, &di_bh, 1);
	if (ret) {
		mlog_errno(ret);
		goto out;
	}

	*meta_level = 1;

	ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX);
	if (ret)
		mlog_errno(ret);
out:
	brelse(di_bh);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
tao ma tao ma 131 100.00% 3 100.00%
Total 131 100.00% 3 100.00%



static int ocfs2_prepare_inode_for_write(struct file *file,
					 loff_t pos,
					 size_t count)
{
	int ret = 0, meta_level = 0;
	struct dentry *dentry = file->f_path.dentry;
	struct inode *inode = d_inode(dentry);
	loff_t 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
                 * proceed, 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;
			}
		}

		end = pos + count;

		ret = ocfs2_check_range_for_refcount(inode, pos, count);
		if (ret == 1) {
			ocfs2_inode_unlock(inode, meta_level);
			meta_level = -1;

			ret = ocfs2_prepare_inode_for_refcount(inode,
							       file,
							       pos,
							       count,
							       &meta_level);
		}

		if (ret < 0) {
			mlog_errno(ret);
			goto out_unlock;
		}

		break;
	}

out_unlock:
	trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno,
					    pos, count);

	if (meta_level >= 0)
		ocfs2_inode_unlock(inode, meta_level);

out:
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 129 52.23% 6 42.86%
tao ma tao ma 93 37.65% 3 21.43%
tiger yang tiger yang 15 6.07% 1 7.14%
al viro al viro 5 2.02% 1 7.14%
david howells david howells 3 1.21% 1 7.14%
justin mattock justin mattock 1 0.40% 1 7.14%
sunil mushran sunil mushran 1 0.40% 1 7.14%
Total 247 100.00% 14 100.00%



static ssize_t ocfs2_file_write_iter(struct kiocb *iocb,
				    struct iov_iter *from)
{
	int direct_io, rw_level;
	ssize_t written = 0;
	ssize_t ret;
	size_t count = iov_iter_count(from);
	struct file *file = iocb->ki_filp;
	struct inode *inode = file_inode(file);
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	int full_coherency = !(osb->s_mount_opt &
			       OCFS2_MOUNT_COHERENCY_BUFFERED);
	void *saved_ki_complete = NULL;
	int append_write = ((iocb->ki_pos + count) >=
			i_size_read(inode) ? 1 : 0);

	trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry,
		(unsigned long long)OCFS2_I(inode)->ip_blkno,
		file->f_path.dentry->d_name.len,
		file->f_path.dentry->d_name.name,
		(unsigned int)from->nr_segs);	/* GRRRRR */

	if (count == 0)
		return 0;

	direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0;

	inode_lock(inode);

	/*
         * Concurrent O_DIRECT writes are allowed with
         * mount_option "coherency=buffered".
         * For append write, we must take rw EX.
         */
	rw_level = (!direct_io || full_coherency || append_write);

	ret = ocfs2_rw_lock(inode, rw_level);
	if (ret < 0) {
		mlog_errno(ret);
		goto out_mutex;
	}

	/*
         * O_DIRECT writes with "coherency=full" need to take EX cluster
         * inode_lock to guarantee coherency.
         */
	if (direct_io && full_coherency) {
		/*
                 * We need to take and drop the inode lock to force
                 * other nodes to drop their caches.  Buffered I/O
                 * already does this in write_begin().
                 */
		ret = ocfs2_inode_lock(inode, NULL, 1);
		if (ret < 0) {
			mlog_errno(ret);
			goto out;
		}

		ocfs2_inode_unlock(inode, 1);
	}

	ret = generic_write_checks(iocb, from);
	if (ret <= 0) {
		if (ret)
			mlog_errno(ret);
		goto out;
	}
	count = ret;

	ret = ocfs2_prepare_inode_for_write(file, iocb->ki_pos, count);
	if (ret < 0) {
		mlog_errno(ret);
		goto out;
	}

	if (direct_io && !is_sync_kiocb(iocb) &&
	    ocfs2_is_io_unaligned(inode, count, iocb->ki_pos)) {
		/*
                 * Make it a sync io if it's an unaligned aio.
                 */
		saved_ki_complete = xchg(&iocb->ki_complete, NULL);
	}

	/* communicate with ocfs2_dio_end_io */
	ocfs2_iocb_set_rw_locked(iocb, rw_level);

	written = __generic_file_write_iter(iocb, from);
	/* buffered aio wouldn't have proper lock coverage today */
	BUG_ON(written == -EIOCBQUEUED && !(iocb->ki_flags & IOCB_DIRECT));

	/*
         * 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.
         * 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 ((written == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) {
		rw_level = -1;
	}

	if (unlikely(written <= 0))
		goto out;

	if (((file->f_flags & O_DSYNC) && !direct_io) ||
	    IS_SYNC(inode)) {
		ret = filemap_fdatawrite_range(file->f_mapping,
					       iocb->ki_pos - written,
					       iocb->ki_pos - 1);
		if (ret < 0)
			written = ret;

		if (!ret) {
			ret = jbd2_journal_force_commit(osb->journal->j_journal);
			if (ret < 0)
				written = ret;
		}

		if (!ret)
			ret = filemap_fdatawait_range(file->f_mapping,
						      iocb->ki_pos - written,
						      iocb->ki_pos - 1);
	}

out:
	if (saved_ki_complete)
		xchg(&iocb->ki_complete, saved_ki_complete);

	if (rw_level != -1)
		ocfs2_rw_unlock(inode, rw_level);

out_mutex:
	inode_unlock(inode);

	if (written)
		ret = written;
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 157 26.43% 5 15.15%
nick piggin nick piggin 107 18.01% 1 3.03%
al viro al viro 97 16.33% 10 30.30%
tristan ye tristan ye 59 9.93% 1 3.03%
ryan ding ryan ding 46 7.74% 2 6.06%
jan kara jan kara 43 7.24% 1 3.03%
joseph qi joseph qi 27 4.55% 3 9.09%
tao ma tao ma 24 4.04% 3 9.09%
tiger yang tiger yang 18 3.03% 1 3.03%
wengang wang wengang wang 8 1.35% 1 3.03%
christoph hellwig christoph hellwig 4 0.67% 2 6.06%
wang weiwei wang weiwei 2 0.34% 1 3.03%
joel becker joel becker 1 0.17% 1 3.03%
li dongyang li dongyang 1 0.17% 1 3.03%
Total 594 100.00% 33 100.00%



static ssize_t ocfs2_file_read_iter(struct kiocb *iocb,
				   struct iov_iter *to)
{
	int ret = 0, rw_level = -1, lock_level = 0;
	struct file *filp = iocb->ki_filp;
	struct inode *inode = file_inode(filp);

	trace_ocfs2_file_aio_read(inode, filp, filp->f_path.dentry,
			(unsigned long long)OCFS2_I(inode)->ip_blkno,
			filp->f_path.dentry->d_name.len,
			filp->f_path.dentry->d_name.name,
			to->nr_segs);	/* GRRRRR */


	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 (iocb->ki_flags & IOCB_DIRECT) {
		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_path.mnt, &lock_level);
	if (ret < 0) {
		mlog_errno(ret);
		goto bail;
	}
	ocfs2_inode_unlock(inode, lock_level);

	ret = generic_file_read_iter(iocb, to);
	trace_generic_file_aio_read_ret(ret);

	/* buffered aio wouldn't have proper lock coverage today */
	BUG_ON(ret == -EIOCBQUEUED && !(iocb->ki_flags & IOCB_DIRECT));

	/* see ocfs2_file_write_iter */
	if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) {
		rw_level = -1;
	}

bail:
	if (rw_level != -1)
		ocfs2_rw_unlock(inode, rw_level);

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 221 79.21% 4 26.67%
al viro al viro 21 7.53% 5 33.33%
tao ma tao ma 20 7.17% 2 13.33%
tiger yang tiger yang 8 2.87% 1 6.67%
josef sipek josef sipek 6 2.15% 1 6.67%
sunil mushran sunil mushran 2 0.72% 1 6.67%
badari pulavarty badari pulavarty 1 0.36% 1 6.67%
Total 279 100.00% 15 100.00%

/* Refer generic_file_llseek_unlocked() */


static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence)
{
	struct inode *inode = file->f_mapping->host;
	int ret = 0;

	inode_lock(inode);

	switch (whence) {
	case SEEK_SET:
		break;
	case SEEK_END:
		/* SEEK_END requires the OCFS2 inode lock for the file
                 * because it references the file's size.
                 */
		ret = ocfs2_inode_lock(inode, NULL, 0);
		if (ret < 0) {
			mlog_errno(ret);
			goto out;
		}
		offset += i_size_read(inode);
		ocfs2_inode_unlock(inode, 0);
		break;
	case SEEK_CUR:
		if (offset == 0) {
			offset = file->f_pos;
			goto out;
		}
		offset += file->f_pos;
		break;
	case SEEK_DATA:
	case SEEK_HOLE:
		ret = ocfs2_seek_data_hole_offset(file, &offset, whence);
		if (ret)
			goto out;
		break;
	default:
		ret = -EINVAL;
		goto out;
	}

	offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes);

out:
	inode_unlock(inode);
	if (ret)
		return ret;
	return offset;
}

Contributors
Person Tokens Prop Commits CommitProp
sunil mushran sunil mushran 139 73.94% 1 20.00%
jensen at huawei.com jensen at huawei.com 38 20.21% 1 20.00%
jeff liu jeff liu 6 3.19% 1 20.00%
andrew morton andrew morton 3 1.60% 1 20.00%
al viro al viro 2 1.06% 1 20.00%
Total 188 100.00% 5 100.00%



static int ocfs2_file_clone_range(struct file *file_in,
				  loff_t pos_in,
				  struct file *file_out,
				  loff_t pos_out,
				  u64 len)
{
	return ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
					 len, false);
}

Contributors
Person Tokens Prop Commits CommitProp
darrick j. wong darrick j. wong 41 100.00% 1 100.00%
Total 41 100.00% 1 100.00%



static ssize_t ocfs2_file_dedupe_range(struct file *src_file,
				       u64 loff,
				       u64 len,
				       struct file *dst_file,
				       u64 dst_loff)
{
	int error;

	error = ocfs2_reflink_remap_range(src_file, loff, dst_file, dst_loff,
					  len, true);
	if (error)
		return error;
	return len;
}

Contributors
Person Tokens Prop Commits CommitProp
darrick j. wong darrick j. wong 55 100.00% 1 100.00%
Total 55 100.00% 1 100.00%


const struct inode_operations ocfs2_file_iops = {
	.setattr	= ocfs2_setattr,
	.getattr	= ocfs2_getattr,
	.permission	= ocfs2_permission,
	.listxattr	= ocfs2_listxattr,
	.fiemap		= ocfs2_fiemap,
	.get_acl	= ocfs2_iop_get_acl,
	.set_acl	= ocfs2_iop_set_acl,
};


const struct inode_operations ocfs2_special_file_iops = {
	.setattr	= ocfs2_setattr,
	.getattr	= ocfs2_getattr,
	.permission	= ocfs2_permission,
	.get_acl	= ocfs2_iop_get_acl,
	.set_acl	= ocfs2_iop_set_acl,
};

/*
 * 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		= ocfs2_file_llseek,
	.mmap		= ocfs2_mmap,
	.fsync		= ocfs2_sync_file,
	.release	= ocfs2_file_release,
	.open		= ocfs2_file_open,
	.read_iter	= ocfs2_file_read_iter,
	.write_iter	= ocfs2_file_write_iter,
	.unlocked_ioctl	= ocfs2_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl   = ocfs2_compat_ioctl,
#endif
	.lock		= ocfs2_lock,
	.flock		= ocfs2_flock,
	.splice_read	= generic_file_splice_read,
	.splice_write	= iter_file_splice_write,
	.fallocate	= ocfs2_fallocate,
	.clone_file_range = ocfs2_file_clone_range,
	.dedupe_file_range = ocfs2_file_dedupe_range,
};


const struct file_operations ocfs2_dops = {
	.llseek		= generic_file_llseek,
	.read		= generic_read_dir,
	.iterate	= 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		= ocfs2_file_llseek,
	.mmap		= ocfs2_mmap,
	.fsync		= ocfs2_sync_file,
	.release	= ocfs2_file_release,
	.open		= ocfs2_file_open,
	.read_iter	= ocfs2_file_read_iter,
	.write_iter	= ocfs2_file_write_iter,
	.unlocked_ioctl	= ocfs2_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl   = ocfs2_compat_ioctl,
#endif
	.flock		= ocfs2_flock,
	.splice_read	= generic_file_splice_read,
	.splice_write	= iter_file_splice_write,
	.fallocate	= ocfs2_fallocate,
	.clone_file_range = ocfs2_file_clone_range,
	.dedupe_file_range = ocfs2_file_dedupe_range,
};


const struct file_operations ocfs2_dops_no_plocks = {
	.llseek		= generic_file_llseek,
	.read		= generic_read_dir,
	.iterate	= 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,
};
Overall Contributors
Person Tokens Prop Commits CommitProp
mark fasheh mark fasheh 5986 55.18% 46 24.34%
joel becker joel becker 982 9.05% 13 6.88%
tao ma tao ma 896 8.26% 13 6.88%
tristan ye tristan ye 633 5.84% 6 3.17%
jan kara jan kara 482 4.44% 14 7.41%
tiger yang tiger yang 394 3.63% 7 3.70%
darrick j. wong darrick j. wong 270 2.49% 4 2.12%
junxiao bi junxiao bi 214 1.97% 6 3.17%
al viro al viro 156 1.44% 18 9.52%
sunil mushran sunil mushran 145 1.34% 2 1.06%
nick piggin nick piggin 116 1.07% 3 1.59%
christoph hellwig christoph hellwig 97 0.89% 14 7.41%
joseph qi joseph qi 58 0.53% 4 2.12%
ryan ding ryan ding 46 0.42% 2 1.06%
josef bacik josef bacik 44 0.41% 2 1.06%
jensen at huawei.com jensen at huawei.com 38 0.35% 1 0.53%
tariq saeed tariq saeed 38 0.35% 2 1.06%
eric w. biederman eric w. biederman 38 0.35% 3 1.59%
john haxby john haxby 29 0.27% 1 0.53%
deepa dinamani deepa dinamani 24 0.22% 1 0.53%
younger liu younger liu 24 0.22% 4 2.12%
ashish samant ashish samant 22 0.20% 1 0.53%
wengang wang wengang wang 19 0.18% 2 1.06%
josef sipek josef sipek 18 0.17% 1 0.53%
dmitriy monakhov dmitriy monakhov 14 0.13% 1 0.53%
herbert poetzl herbert poetzl 11 0.10% 1 0.53%
david howells david howells 10 0.09% 1 0.53%
kirill a. shutemov kirill a. shutemov 8 0.07% 1 0.53%
jeff liu jeff liu 6 0.06% 1 0.53%
hisashi hifumi hisashi hifumi 5 0.05% 1 0.53%
arjan van de ven arjan van de ven 4 0.04% 2 1.06%
luis henriques luis henriques 4 0.04% 1 0.53%
randy dunlap randy dunlap 3 0.03% 1 0.53%
andrew morton andrew morton 3 0.03% 1 0.53%
julia lawall julia lawall 2 0.02% 1 0.53%
wang weiwei wang weiwei 2 0.02% 1 0.53%
andi kleen andi kleen 2 0.02% 1 0.53%
tejun heo tejun heo 1 0.01% 1 0.53%
jens axboe jens axboe 1 0.01% 1 0.53%
justin mattock justin mattock 1 0.01% 1 0.53%
li dongyang li dongyang 1 0.01% 1 0.53%
badari pulavarty badari pulavarty 1 0.01% 1 0.53%
Total 10848 100.00% 189 100.00%
Directory: fs/ocfs2

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
mark fasheh	mark fasheh	76	100.00%	1	100.00%
	Total	76	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.10 fs/ocfs2/file.c

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