9e33d69f55
For each quota type each node has local quota file. In this file it stores changes users have made to disk usage via this node. Once in a while this information is synced to global file (and thus with other nodes) so that limits enforcement at least aproximately works. Global quota files contain all the information about usage and limits. It's mostly handled by the generic VFS code (which implements a trie of structures inside a quota file). We only have to provide functions to convert structures from on-disk format to in-memory one. We also have to provide wrappers for various quota functions starting transactions and acquiring necessary cluster locks before the actual IO is really started. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
73 lines
2.4 KiB
C
73 lines
2.4 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.h
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*
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* Function prototypes
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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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#ifndef OCFS2_FILE_H
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#define OCFS2_FILE_H
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extern const struct file_operations ocfs2_fops;
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extern const struct file_operations ocfs2_dops;
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extern const struct file_operations ocfs2_fops_no_plocks;
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extern const struct file_operations ocfs2_dops_no_plocks;
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extern const struct inode_operations ocfs2_file_iops;
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extern const struct inode_operations ocfs2_special_file_iops;
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struct ocfs2_alloc_context;
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enum ocfs2_alloc_restarted;
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struct ocfs2_file_private {
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struct file *fp_file;
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struct mutex fp_mutex;
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struct ocfs2_lock_res fp_flock;
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};
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int ocfs2_add_inode_data(struct ocfs2_super *osb,
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struct inode *inode,
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u32 *logical_offset,
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u32 clusters_to_add,
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int mark_unwritten,
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struct buffer_head *fe_bh,
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handle_t *handle,
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struct ocfs2_alloc_context *data_ac,
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struct ocfs2_alloc_context *meta_ac,
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enum ocfs2_alloc_restarted *reason_ret);
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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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int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size,
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u64 zero_to);
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int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
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int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
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struct kstat *stat);
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int ocfs2_permission(struct inode *inode, int mask);
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int ocfs2_should_update_atime(struct inode *inode,
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struct vfsmount *vfsmnt);
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int ocfs2_update_inode_atime(struct inode *inode,
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struct buffer_head *bh);
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int ocfs2_change_file_space(struct file *file, unsigned int cmd,
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struct ocfs2_space_resv *sr);
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#endif /* OCFS2_FILE_H */
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