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b3b94faa5f
This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
1621 lines
33 KiB
C
1621 lines
33 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2.
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/completion.h>
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#include <linux/buffer_head.h>
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#include <linux/xattr.h>
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#include <asm/semaphore.h>
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#include <asm/uaccess.h>
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#include "gfs2.h"
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#include "acl.h"
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#include "eaops.h"
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#include "eattr.h"
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#include "glock.h"
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#include "inode.h"
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#include "meta_io.h"
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#include "quota.h"
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#include "rgrp.h"
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#include "trans.h"
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/**
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* ea_calc_size - returns the acutal number of bytes the request will take up
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* (not counting any unstuffed data blocks)
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* @sdp:
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* @er:
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* @size:
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*
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* Returns: 1 if the EA should be stuffed
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*/
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static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
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unsigned int *size)
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{
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*size = GFS2_EAREQ_SIZE_STUFFED(er);
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if (*size <= sdp->sd_jbsize)
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return 1;
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*size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
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return 0;
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}
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static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
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{
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unsigned int size;
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if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
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return -ERANGE;
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ea_calc_size(sdp, er, &size);
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/* This can only happen with 512 byte blocks */
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if (size > sdp->sd_jbsize)
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return -ERANGE;
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return 0;
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}
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typedef int (*ea_call_t) (struct gfs2_inode *ip,
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struct buffer_head *bh,
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struct gfs2_ea_header *ea,
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struct gfs2_ea_header *prev,
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void *private);
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static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
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ea_call_t ea_call, void *data)
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{
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struct gfs2_ea_header *ea, *prev = NULL;
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int error = 0;
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if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA))
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return -EIO;
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for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
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if (!GFS2_EA_REC_LEN(ea))
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goto fail;
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if (!(bh->b_data <= (char *)ea &&
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(char *)GFS2_EA2NEXT(ea) <=
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bh->b_data + bh->b_size))
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goto fail;
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if (!GFS2_EATYPE_VALID(ea->ea_type))
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goto fail;
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error = ea_call(ip, bh, ea, prev, data);
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if (error)
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return error;
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if (GFS2_EA_IS_LAST(ea)) {
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if ((char *)GFS2_EA2NEXT(ea) !=
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bh->b_data + bh->b_size)
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goto fail;
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break;
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}
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}
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return error;
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fail:
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gfs2_consist_inode(ip);
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return -EIO;
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}
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static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
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{
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struct buffer_head *bh, *eabh;
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uint64_t *eablk, *end;
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int error;
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error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
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DIO_START | DIO_WAIT, &bh);
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if (error)
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return error;
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if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
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error = ea_foreach_i(ip, bh, ea_call, data);
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goto out;
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}
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if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
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error = -EIO;
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goto out;
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}
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eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
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end = eablk + ip->i_sbd->sd_inptrs;
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for (; eablk < end; eablk++) {
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uint64_t bn;
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if (!*eablk)
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break;
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bn = be64_to_cpu(*eablk);
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error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT,
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&eabh);
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if (error)
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break;
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error = ea_foreach_i(ip, eabh, ea_call, data);
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brelse(eabh);
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if (error)
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break;
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}
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out:
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brelse(bh);
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return error;
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}
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struct ea_find {
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struct gfs2_ea_request *ef_er;
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struct gfs2_ea_location *ef_el;
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};
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static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
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struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
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void *private)
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{
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struct ea_find *ef = private;
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struct gfs2_ea_request *er = ef->ef_er;
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if (ea->ea_type == GFS2_EATYPE_UNUSED)
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return 0;
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if (ea->ea_type == er->er_type) {
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if (ea->ea_name_len == er->er_name_len &&
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!memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
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struct gfs2_ea_location *el = ef->ef_el;
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get_bh(bh);
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el->el_bh = bh;
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el->el_ea = ea;
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el->el_prev = prev;
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return 1;
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}
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}
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#if 0
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else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) &&
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er->er_type == GFS2_EATYPE_SYS)
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return 1;
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#endif
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return 0;
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}
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int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
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struct gfs2_ea_location *el)
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{
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struct ea_find ef;
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int error;
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ef.ef_er = er;
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ef.ef_el = el;
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memset(el, 0, sizeof(struct gfs2_ea_location));
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error = ea_foreach(ip, ea_find_i, &ef);
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if (error > 0)
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return 0;
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return error;
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}
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/**
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* ea_dealloc_unstuffed -
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* @ip:
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* @bh:
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* @ea:
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* @prev:
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* @private:
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*
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* Take advantage of the fact that all unstuffed blocks are
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* allocated from the same RG. But watch, this may not always
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* be true.
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*
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* Returns: errno
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*/
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static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
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struct gfs2_ea_header *ea,
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struct gfs2_ea_header *prev, void *private)
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{
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int *leave = private;
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struct gfs2_sbd *sdp = ip->i_sbd;
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struct gfs2_rgrpd *rgd;
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struct gfs2_holder rg_gh;
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struct buffer_head *dibh;
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uint64_t *dataptrs, bn = 0;
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uint64_t bstart = 0;
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unsigned int blen = 0;
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unsigned int blks = 0;
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unsigned int x;
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int error;
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if (GFS2_EA_IS_STUFFED(ea))
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return 0;
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dataptrs = GFS2_EA2DATAPTRS(ea);
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for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
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if (*dataptrs) {
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blks++;
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bn = be64_to_cpu(*dataptrs);
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}
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if (!blks)
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return 0;
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rgd = gfs2_blk2rgrpd(sdp, bn);
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if (!rgd) {
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gfs2_consist_inode(ip);
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return -EIO;
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}
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error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
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if (error)
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return error;
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error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length +
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RES_DINODE + RES_EATTR + RES_STATFS +
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RES_QUOTA, blks);
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if (error)
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goto out_gunlock;
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gfs2_trans_add_bh(ip->i_gl, bh);
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dataptrs = GFS2_EA2DATAPTRS(ea);
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for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
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if (!*dataptrs)
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break;
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bn = be64_to_cpu(*dataptrs);
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if (bstart + blen == bn)
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blen++;
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else {
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if (bstart)
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gfs2_free_meta(ip, bstart, blen);
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bstart = bn;
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blen = 1;
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}
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*dataptrs = 0;
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if (!ip->i_di.di_blocks)
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gfs2_consist_inode(ip);
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ip->i_di.di_blocks--;
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}
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if (bstart)
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gfs2_free_meta(ip, bstart, blen);
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if (prev && !leave) {
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uint32_t len;
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len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
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prev->ea_rec_len = cpu_to_be32(len);
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if (GFS2_EA_IS_LAST(ea))
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prev->ea_flags |= GFS2_EAFLAG_LAST;
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} else {
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ea->ea_type = GFS2_EATYPE_UNUSED;
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ea->ea_num_ptrs = 0;
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}
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error = gfs2_meta_inode_buffer(ip, &dibh);
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if (!error) {
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ip->i_di.di_ctime = get_seconds();
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gfs2_trans_add_bh(ip->i_gl, dibh);
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gfs2_dinode_out(&ip->i_di, dibh->b_data);
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brelse(dibh);
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}
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gfs2_trans_end(sdp);
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out_gunlock:
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gfs2_glock_dq_uninit(&rg_gh);
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return error;
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}
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static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
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struct gfs2_ea_header *ea,
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struct gfs2_ea_header *prev, int leave)
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{
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struct gfs2_alloc *al;
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int error;
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al = gfs2_alloc_get(ip);
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error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
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if (error)
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goto out_alloc;
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error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
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if (error)
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goto out_quota;
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error = ea_dealloc_unstuffed(ip,
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bh, ea, prev,
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(leave) ? &error : NULL);
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gfs2_glock_dq_uninit(&al->al_ri_gh);
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out_quota:
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gfs2_quota_unhold(ip);
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out_alloc:
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gfs2_alloc_put(ip);
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return error;
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}
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/******************************************************************************/
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static int gfs2_ea_repack_i(struct gfs2_inode *ip)
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{
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return -EOPNOTSUPP;
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}
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int gfs2_ea_repack(struct gfs2_inode *ip)
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{
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struct gfs2_holder gh;
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int error;
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error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
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if (error)
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return error;
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/* Some sort of permissions checking would be nice */
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error = gfs2_ea_repack_i(ip);
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gfs2_glock_dq_uninit(&gh);
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return error;
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}
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struct ea_list {
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struct gfs2_ea_request *ei_er;
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unsigned int ei_size;
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};
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static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
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struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
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void *private)
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{
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struct ea_list *ei = private;
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struct gfs2_ea_request *er = ei->ei_er;
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unsigned int ea_size = GFS2_EA_STRLEN(ea);
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if (ea->ea_type == GFS2_EATYPE_UNUSED)
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return 0;
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if (er->er_data_len) {
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char *prefix;
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unsigned int l;
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char c = 0;
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if (ei->ei_size + ea_size > er->er_data_len)
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return -ERANGE;
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if (ea->ea_type == GFS2_EATYPE_USR) {
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prefix = "user.";
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l = 5;
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} else {
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prefix = "system.";
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l = 7;
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}
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memcpy(er->er_data + ei->ei_size,
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prefix, l);
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memcpy(er->er_data + ei->ei_size + l,
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GFS2_EA2NAME(ea),
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ea->ea_name_len);
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memcpy(er->er_data + ei->ei_size +
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ea_size - 1,
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&c, 1);
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}
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ei->ei_size += ea_size;
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return 0;
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}
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|
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/**
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* gfs2_ea_list -
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* @ip:
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* @er:
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*
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* Returns: actual size of data on success, -errno on error
|
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*/
|
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|
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int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
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{
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struct gfs2_holder i_gh;
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int error;
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|
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if (!er->er_data || !er->er_data_len) {
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er->er_data = NULL;
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er->er_data_len = 0;
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}
|
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|
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error = gfs2_glock_nq_init(ip->i_gl,
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LM_ST_SHARED, LM_FLAG_ANY,
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&i_gh);
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if (error)
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return error;
|
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|
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if (ip->i_di.di_eattr) {
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struct ea_list ei = { .ei_er = er, .ei_size = 0 };
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|
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error = ea_foreach(ip, ea_list_i, &ei);
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if (!error)
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error = ei.ei_size;
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}
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|
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gfs2_glock_dq_uninit(&i_gh);
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|
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return error;
|
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}
|
|
|
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/**
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* ea_get_unstuffed - actually copies the unstuffed data into the
|
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* request buffer
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* @ip:
|
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* @ea:
|
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* @data:
|
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*
|
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* Returns: errno
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*/
|
|
|
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static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
|
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char *data)
|
|
{
|
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struct gfs2_sbd *sdp = ip->i_sbd;
|
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struct buffer_head **bh;
|
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unsigned int amount = GFS2_EA_DATA_LEN(ea);
|
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unsigned int nptrs = DIV_RU(amount, sdp->sd_jbsize);
|
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uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
|
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unsigned int x;
|
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int error = 0;
|
|
|
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bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
|
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if (!bh)
|
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return -ENOMEM;
|
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|
|
for (x = 0; x < nptrs; x++) {
|
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error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
|
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DIO_START, bh + x);
|
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if (error) {
|
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while (x--)
|
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brelse(bh[x]);
|
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goto out;
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}
|
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dataptrs++;
|
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}
|
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|
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for (x = 0; x < nptrs; x++) {
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error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
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if (error) {
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for (; x < nptrs; x++)
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brelse(bh[x]);
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goto out;
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}
|
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if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
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for (; x < nptrs; x++)
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brelse(bh[x]);
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error = -EIO;
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goto out;
|
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}
|
|
|
|
memcpy(data,
|
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bh[x]->b_data + sizeof(struct gfs2_meta_header),
|
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(sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
|
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|
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amount -= sdp->sd_jbsize;
|
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data += sdp->sd_jbsize;
|
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|
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brelse(bh[x]);
|
|
}
|
|
|
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out:
|
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kfree(bh);
|
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|
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return error;
|
|
}
|
|
|
|
int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
|
|
char *data)
|
|
{
|
|
if (GFS2_EA_IS_STUFFED(el->el_ea)) {
|
|
memcpy(data,
|
|
GFS2_EA2DATA(el->el_ea),
|
|
GFS2_EA_DATA_LEN(el->el_ea));
|
|
return 0;
|
|
} else
|
|
return ea_get_unstuffed(ip, el->el_ea, data);
|
|
}
|
|
|
|
/**
|
|
* gfs2_ea_get_i -
|
|
* @ip:
|
|
* @er:
|
|
*
|
|
* Returns: actual size of data on success, -errno on error
|
|
*/
|
|
|
|
int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
|
|
{
|
|
struct gfs2_ea_location el;
|
|
int error;
|
|
|
|
if (!ip->i_di.di_eattr)
|
|
return -ENODATA;
|
|
|
|
error = gfs2_ea_find(ip, er, &el);
|
|
if (error)
|
|
return error;
|
|
if (!el.el_ea)
|
|
return -ENODATA;
|
|
|
|
if (er->er_data_len) {
|
|
if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
|
|
error = -ERANGE;
|
|
else
|
|
error = gfs2_ea_get_copy(ip, &el, er->er_data);
|
|
}
|
|
if (!error)
|
|
error = GFS2_EA_DATA_LEN(el.el_ea);
|
|
|
|
brelse(el.el_bh);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_ea_get -
|
|
* @ip:
|
|
* @er:
|
|
*
|
|
* Returns: actual size of data on success, -errno on error
|
|
*/
|
|
|
|
int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
|
|
{
|
|
struct gfs2_holder i_gh;
|
|
int error;
|
|
|
|
if (!er->er_name_len ||
|
|
er->er_name_len > GFS2_EA_MAX_NAME_LEN)
|
|
return -EINVAL;
|
|
if (!er->er_data || !er->er_data_len) {
|
|
er->er_data = NULL;
|
|
er->er_data_len = 0;
|
|
}
|
|
|
|
error = gfs2_glock_nq_init(ip->i_gl,
|
|
LM_ST_SHARED, LM_FLAG_ANY,
|
|
&i_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
|
|
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* ea_alloc_blk - allocates a new block for extended attributes.
|
|
* @ip: A pointer to the inode that's getting extended attributes
|
|
* @bhp:
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
|
|
{
|
|
struct gfs2_sbd *sdp = ip->i_sbd;
|
|
struct gfs2_ea_header *ea;
|
|
uint64_t block;
|
|
|
|
block = gfs2_alloc_meta(ip);
|
|
|
|
*bhp = gfs2_meta_new(ip->i_gl, block);
|
|
gfs2_trans_add_bh(ip->i_gl, *bhp);
|
|
gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
|
|
gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
|
|
|
|
ea = GFS2_EA_BH2FIRST(*bhp);
|
|
ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
|
|
ea->ea_type = GFS2_EATYPE_UNUSED;
|
|
ea->ea_flags = GFS2_EAFLAG_LAST;
|
|
ea->ea_num_ptrs = 0;
|
|
|
|
ip->i_di.di_blocks++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ea_write - writes the request info to an ea, creating new blocks if
|
|
* necessary
|
|
* @ip: inode that is being modified
|
|
* @ea: the location of the new ea in a block
|
|
* @er: the write request
|
|
*
|
|
* Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
|
|
*
|
|
* returns : errno
|
|
*/
|
|
|
|
static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
|
|
struct gfs2_ea_request *er)
|
|
{
|
|
struct gfs2_sbd *sdp = ip->i_sbd;
|
|
|
|
ea->ea_data_len = cpu_to_be32(er->er_data_len);
|
|
ea->ea_name_len = er->er_name_len;
|
|
ea->ea_type = er->er_type;
|
|
ea->__pad = 0;
|
|
|
|
memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
|
|
|
|
if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
|
|
ea->ea_num_ptrs = 0;
|
|
memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
|
|
} else {
|
|
uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
|
|
const char *data = er->er_data;
|
|
unsigned int data_len = er->er_data_len;
|
|
unsigned int copy;
|
|
unsigned int x;
|
|
|
|
ea->ea_num_ptrs = DIV_RU(er->er_data_len, sdp->sd_jbsize);
|
|
for (x = 0; x < ea->ea_num_ptrs; x++) {
|
|
struct buffer_head *bh;
|
|
uint64_t block;
|
|
int mh_size = sizeof(struct gfs2_meta_header);
|
|
|
|
block = gfs2_alloc_meta(ip);
|
|
|
|
bh = gfs2_meta_new(ip->i_gl, block);
|
|
gfs2_trans_add_bh(ip->i_gl, bh);
|
|
gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
|
|
|
|
ip->i_di.di_blocks++;
|
|
|
|
copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
|
|
data_len;
|
|
memcpy(bh->b_data + mh_size, data, copy);
|
|
if (copy < sdp->sd_jbsize)
|
|
memset(bh->b_data + mh_size + copy, 0,
|
|
sdp->sd_jbsize - copy);
|
|
|
|
*dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
|
|
data += copy;
|
|
data_len -= copy;
|
|
|
|
brelse(bh);
|
|
}
|
|
|
|
gfs2_assert_withdraw(sdp, !data_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
|
|
struct gfs2_ea_request *er,
|
|
void *private);
|
|
|
|
static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
|
|
unsigned int blks,
|
|
ea_skeleton_call_t skeleton_call,
|
|
void *private)
|
|
{
|
|
struct gfs2_alloc *al;
|
|
struct buffer_head *dibh;
|
|
int error;
|
|
|
|
al = gfs2_alloc_get(ip);
|
|
|
|
error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
|
|
if (error)
|
|
goto out;
|
|
|
|
error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
|
|
if (error)
|
|
goto out_gunlock_q;
|
|
|
|
al->al_requested = blks;
|
|
|
|
error = gfs2_inplace_reserve(ip);
|
|
if (error)
|
|
goto out_gunlock_q;
|
|
|
|
error = gfs2_trans_begin(ip->i_sbd,
|
|
blks + al->al_rgd->rd_ri.ri_length +
|
|
RES_DINODE + RES_STATFS + RES_QUOTA, 0);
|
|
if (error)
|
|
goto out_ipres;
|
|
|
|
error = skeleton_call(ip, er, private);
|
|
if (error)
|
|
goto out_end_trans;
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (!error) {
|
|
if (er->er_flags & GFS2_ERF_MODE) {
|
|
gfs2_assert_withdraw(ip->i_sbd,
|
|
(ip->i_di.di_mode & S_IFMT) ==
|
|
(er->er_mode & S_IFMT));
|
|
ip->i_di.di_mode = er->er_mode;
|
|
}
|
|
ip->i_di.di_ctime = get_seconds();
|
|
gfs2_trans_add_bh(ip->i_gl, dibh);
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
brelse(dibh);
|
|
}
|
|
|
|
out_end_trans:
|
|
gfs2_trans_end(ip->i_sbd);
|
|
|
|
out_ipres:
|
|
gfs2_inplace_release(ip);
|
|
|
|
out_gunlock_q:
|
|
gfs2_quota_unlock(ip);
|
|
|
|
out:
|
|
gfs2_alloc_put(ip);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
|
|
void *private)
|
|
{
|
|
struct buffer_head *bh;
|
|
int error;
|
|
|
|
error = ea_alloc_blk(ip, &bh);
|
|
if (error)
|
|
return error;
|
|
|
|
ip->i_di.di_eattr = bh->b_blocknr;
|
|
error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
|
|
|
|
brelse(bh);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* ea_init - initializes a new eattr block
|
|
* @ip:
|
|
* @er:
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
|
|
{
|
|
unsigned int jbsize = ip->i_sbd->sd_jbsize;
|
|
unsigned int blks = 1;
|
|
|
|
if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
|
|
blks += DIV_RU(er->er_data_len, jbsize);
|
|
|
|
return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
|
|
}
|
|
|
|
static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
|
|
{
|
|
uint32_t ea_size = GFS2_EA_SIZE(ea);
|
|
struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + ea_size);
|
|
uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
|
|
int last = ea->ea_flags & GFS2_EAFLAG_LAST;
|
|
|
|
ea->ea_rec_len = cpu_to_be32(ea_size);
|
|
ea->ea_flags ^= last;
|
|
|
|
new->ea_rec_len = cpu_to_be32(new_size);
|
|
new->ea_flags = last;
|
|
|
|
return new;
|
|
}
|
|
|
|
static void ea_set_remove_stuffed(struct gfs2_inode *ip,
|
|
struct gfs2_ea_location *el)
|
|
{
|
|
struct gfs2_ea_header *ea = el->el_ea;
|
|
struct gfs2_ea_header *prev = el->el_prev;
|
|
uint32_t len;
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, el->el_bh);
|
|
|
|
if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
|
|
ea->ea_type = GFS2_EATYPE_UNUSED;
|
|
return;
|
|
} else if (GFS2_EA2NEXT(prev) != ea) {
|
|
prev = GFS2_EA2NEXT(prev);
|
|
gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
|
|
}
|
|
|
|
len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
|
|
prev->ea_rec_len = cpu_to_be32(len);
|
|
|
|
if (GFS2_EA_IS_LAST(ea))
|
|
prev->ea_flags |= GFS2_EAFLAG_LAST;
|
|
}
|
|
|
|
struct ea_set {
|
|
int ea_split;
|
|
|
|
struct gfs2_ea_request *es_er;
|
|
struct gfs2_ea_location *es_el;
|
|
|
|
struct buffer_head *es_bh;
|
|
struct gfs2_ea_header *es_ea;
|
|
};
|
|
|
|
static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
|
|
struct gfs2_ea_header *ea, struct ea_set *es)
|
|
{
|
|
struct gfs2_ea_request *er = es->es_er;
|
|
struct buffer_head *dibh;
|
|
int error;
|
|
|
|
error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, bh);
|
|
|
|
if (es->ea_split)
|
|
ea = ea_split_ea(ea);
|
|
|
|
ea_write(ip, ea, er);
|
|
|
|
if (es->es_el)
|
|
ea_set_remove_stuffed(ip, es->es_el);
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (er->er_flags & GFS2_ERF_MODE) {
|
|
gfs2_assert_withdraw(ip->i_sbd,
|
|
(ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
|
|
ip->i_di.di_mode = er->er_mode;
|
|
}
|
|
ip->i_di.di_ctime = get_seconds();
|
|
gfs2_trans_add_bh(ip->i_gl, dibh);
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
brelse(dibh);
|
|
out:
|
|
gfs2_trans_end(ip->i_sbd);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int ea_set_simple_alloc(struct gfs2_inode *ip,
|
|
struct gfs2_ea_request *er, void *private)
|
|
{
|
|
struct ea_set *es = private;
|
|
struct gfs2_ea_header *ea = es->es_ea;
|
|
int error;
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, es->es_bh);
|
|
|
|
if (es->ea_split)
|
|
ea = ea_split_ea(ea);
|
|
|
|
error = ea_write(ip, ea, er);
|
|
if (error)
|
|
return error;
|
|
|
|
if (es->es_el)
|
|
ea_set_remove_stuffed(ip, es->es_el);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
|
|
struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
|
|
void *private)
|
|
{
|
|
struct ea_set *es = private;
|
|
unsigned int size;
|
|
int stuffed;
|
|
int error;
|
|
|
|
stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size);
|
|
|
|
if (ea->ea_type == GFS2_EATYPE_UNUSED) {
|
|
if (GFS2_EA_REC_LEN(ea) < size)
|
|
return 0;
|
|
if (!GFS2_EA_IS_STUFFED(ea)) {
|
|
error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
|
|
if (error)
|
|
return error;
|
|
}
|
|
es->ea_split = 0;
|
|
} else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
|
|
es->ea_split = 1;
|
|
else
|
|
return 0;
|
|
|
|
if (stuffed) {
|
|
error = ea_set_simple_noalloc(ip, bh, ea, es);
|
|
if (error)
|
|
return error;
|
|
} else {
|
|
unsigned int blks;
|
|
|
|
es->es_bh = bh;
|
|
es->es_ea = ea;
|
|
blks = 2 + DIV_RU(es->es_er->er_data_len, ip->i_sbd->sd_jbsize);
|
|
|
|
error = ea_alloc_skeleton(ip, es->es_er, blks,
|
|
ea_set_simple_alloc, es);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
|
|
void *private)
|
|
{
|
|
struct gfs2_sbd *sdp = ip->i_sbd;
|
|
struct buffer_head *indbh, *newbh;
|
|
uint64_t *eablk;
|
|
int error;
|
|
int mh_size = sizeof(struct gfs2_meta_header);
|
|
|
|
if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
|
|
uint64_t *end;
|
|
|
|
error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
|
|
DIO_START | DIO_WAIT, &indbh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
eablk = (uint64_t *)(indbh->b_data + mh_size);
|
|
end = eablk + sdp->sd_inptrs;
|
|
|
|
for (; eablk < end; eablk++)
|
|
if (!*eablk)
|
|
break;
|
|
|
|
if (eablk == end) {
|
|
error = -ENOSPC;
|
|
goto out;
|
|
}
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, indbh);
|
|
} else {
|
|
uint64_t blk;
|
|
|
|
blk = gfs2_alloc_meta(ip);
|
|
|
|
indbh = gfs2_meta_new(ip->i_gl, blk);
|
|
gfs2_trans_add_bh(ip->i_gl, indbh);
|
|
gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
|
|
gfs2_buffer_clear_tail(indbh, mh_size);
|
|
|
|
eablk = (uint64_t *)(indbh->b_data + mh_size);
|
|
*eablk = cpu_to_be64(ip->i_di.di_eattr);
|
|
ip->i_di.di_eattr = blk;
|
|
ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
|
|
ip->i_di.di_blocks++;
|
|
|
|
eablk++;
|
|
}
|
|
|
|
error = ea_alloc_blk(ip, &newbh);
|
|
if (error)
|
|
goto out;
|
|
|
|
*eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
|
|
error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
|
|
brelse(newbh);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (private)
|
|
ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
|
|
|
|
out:
|
|
brelse(indbh);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
|
|
struct gfs2_ea_location *el)
|
|
{
|
|
struct ea_set es;
|
|
unsigned int blks = 2;
|
|
int error;
|
|
|
|
memset(&es, 0, sizeof(struct ea_set));
|
|
es.es_er = er;
|
|
es.es_el = el;
|
|
|
|
error = ea_foreach(ip, ea_set_simple, &es);
|
|
if (error > 0)
|
|
return 0;
|
|
if (error)
|
|
return error;
|
|
|
|
if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
|
|
blks++;
|
|
if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
|
|
blks += DIV_RU(er->er_data_len, ip->i_sbd->sd_jbsize);
|
|
|
|
return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
|
|
}
|
|
|
|
static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
|
|
struct gfs2_ea_location *el)
|
|
{
|
|
if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
|
|
el->el_prev = GFS2_EA2NEXT(el->el_prev);
|
|
gfs2_assert_withdraw(ip->i_sbd,
|
|
GFS2_EA2NEXT(el->el_prev) == el->el_ea);
|
|
}
|
|
|
|
return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
|
|
}
|
|
|
|
int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
|
|
{
|
|
struct gfs2_ea_location el;
|
|
int error;
|
|
|
|
if (!ip->i_di.di_eattr) {
|
|
if (er->er_flags & XATTR_REPLACE)
|
|
return -ENODATA;
|
|
return ea_init(ip, er);
|
|
}
|
|
|
|
error = gfs2_ea_find(ip, er, &el);
|
|
if (error)
|
|
return error;
|
|
|
|
if (el.el_ea) {
|
|
if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
|
|
brelse(el.el_bh);
|
|
return -EPERM;
|
|
}
|
|
|
|
error = -EEXIST;
|
|
if (!(er->er_flags & XATTR_CREATE)) {
|
|
int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
|
|
error = ea_set_i(ip, er, &el);
|
|
if (!error && unstuffed)
|
|
ea_set_remove_unstuffed(ip, &el);
|
|
}
|
|
|
|
brelse(el.el_bh);
|
|
} else {
|
|
error = -ENODATA;
|
|
if (!(er->er_flags & XATTR_REPLACE))
|
|
error = ea_set_i(ip, er, NULL);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
|
|
{
|
|
struct gfs2_holder i_gh;
|
|
int error;
|
|
|
|
if (!er->er_name_len ||
|
|
er->er_name_len > GFS2_EA_MAX_NAME_LEN)
|
|
return -EINVAL;
|
|
if (!er->er_data || !er->er_data_len) {
|
|
er->er_data = NULL;
|
|
er->er_data_len = 0;
|
|
}
|
|
error = ea_check_size(ip->i_sbd, er);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (IS_IMMUTABLE(ip->i_vnode))
|
|
error = -EPERM;
|
|
else
|
|
error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
|
|
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
|
|
{
|
|
struct gfs2_ea_header *ea = el->el_ea;
|
|
struct gfs2_ea_header *prev = el->el_prev;
|
|
struct buffer_head *dibh;
|
|
int error;
|
|
|
|
error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, el->el_bh);
|
|
|
|
if (prev) {
|
|
uint32_t len;
|
|
|
|
len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
|
|
prev->ea_rec_len = cpu_to_be32(len);
|
|
|
|
if (GFS2_EA_IS_LAST(ea))
|
|
prev->ea_flags |= GFS2_EAFLAG_LAST;
|
|
} else
|
|
ea->ea_type = GFS2_EATYPE_UNUSED;
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (!error) {
|
|
ip->i_di.di_ctime = get_seconds();
|
|
gfs2_trans_add_bh(ip->i_gl, dibh);
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
brelse(dibh);
|
|
}
|
|
|
|
gfs2_trans_end(ip->i_sbd);
|
|
|
|
return error;
|
|
}
|
|
|
|
int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
|
|
{
|
|
struct gfs2_ea_location el;
|
|
int error;
|
|
|
|
if (!ip->i_di.di_eattr)
|
|
return -ENODATA;
|
|
|
|
error = gfs2_ea_find(ip, er, &el);
|
|
if (error)
|
|
return error;
|
|
if (!el.el_ea)
|
|
return -ENODATA;
|
|
|
|
if (GFS2_EA_IS_STUFFED(el.el_ea))
|
|
error = ea_remove_stuffed(ip, &el);
|
|
else
|
|
error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
|
|
0);
|
|
|
|
brelse(el.el_bh);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_ea_remove - sets (or creates or replaces) an extended attribute
|
|
* @ip: pointer to the inode of the target file
|
|
* @er: request information
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
|
|
{
|
|
struct gfs2_holder i_gh;
|
|
int error;
|
|
|
|
if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
|
|
return -EINVAL;
|
|
|
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
|
|
error = -EPERM;
|
|
else
|
|
error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
|
|
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
|
|
struct gfs2_ea_header *ea, char *data)
|
|
{
|
|
struct gfs2_sbd *sdp = ip->i_sbd;
|
|
struct buffer_head **bh;
|
|
unsigned int amount = GFS2_EA_DATA_LEN(ea);
|
|
unsigned int nptrs = DIV_RU(amount, sdp->sd_jbsize);
|
|
uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
|
|
unsigned int x;
|
|
int error;
|
|
|
|
bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
|
|
if (!bh)
|
|
return -ENOMEM;
|
|
|
|
error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
|
|
if (error)
|
|
goto out;
|
|
|
|
for (x = 0; x < nptrs; x++) {
|
|
error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
|
|
DIO_START, bh + x);
|
|
if (error) {
|
|
while (x--)
|
|
brelse(bh[x]);
|
|
goto fail;
|
|
}
|
|
dataptrs++;
|
|
}
|
|
|
|
for (x = 0; x < nptrs; x++) {
|
|
error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
|
|
if (error) {
|
|
for (; x < nptrs; x++)
|
|
brelse(bh[x]);
|
|
goto fail;
|
|
}
|
|
if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
|
|
for (; x < nptrs; x++)
|
|
brelse(bh[x]);
|
|
error = -EIO;
|
|
goto fail;
|
|
}
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, bh[x]);
|
|
|
|
memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
|
|
data,
|
|
(sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
|
|
|
|
amount -= sdp->sd_jbsize;
|
|
data += sdp->sd_jbsize;
|
|
|
|
brelse(bh[x]);
|
|
}
|
|
|
|
out:
|
|
kfree(bh);
|
|
|
|
return error;
|
|
|
|
fail:
|
|
gfs2_trans_end(sdp);
|
|
kfree(bh);
|
|
|
|
return error;
|
|
}
|
|
|
|
int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
|
|
struct iattr *attr, char *data)
|
|
{
|
|
struct buffer_head *dibh;
|
|
int error;
|
|
|
|
if (GFS2_EA_IS_STUFFED(el->el_ea)) {
|
|
error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, el->el_bh);
|
|
memcpy(GFS2_EA2DATA(el->el_ea),
|
|
data,
|
|
GFS2_EA_DATA_LEN(el->el_ea));
|
|
} else
|
|
error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (!error) {
|
|
error = inode_setattr(ip->i_vnode, attr);
|
|
gfs2_assert_warn(ip->i_sbd, !error);
|
|
gfs2_inode_attr_out(ip);
|
|
gfs2_trans_add_bh(ip->i_gl, dibh);
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
brelse(dibh);
|
|
}
|
|
|
|
gfs2_trans_end(ip->i_sbd);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int ea_dealloc_indirect(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = ip->i_sbd;
|
|
struct gfs2_rgrp_list rlist;
|
|
struct buffer_head *indbh, *dibh;
|
|
uint64_t *eablk, *end;
|
|
unsigned int rg_blocks = 0;
|
|
uint64_t bstart = 0;
|
|
unsigned int blen = 0;
|
|
unsigned int blks = 0;
|
|
unsigned int x;
|
|
int error;
|
|
|
|
memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
|
|
|
|
error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
|
|
DIO_START | DIO_WAIT, &indbh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
|
|
end = eablk + sdp->sd_inptrs;
|
|
|
|
for (; eablk < end; eablk++) {
|
|
uint64_t bn;
|
|
|
|
if (!*eablk)
|
|
break;
|
|
bn = be64_to_cpu(*eablk);
|
|
|
|
if (bstart + blen == bn)
|
|
blen++;
|
|
else {
|
|
if (bstart)
|
|
gfs2_rlist_add(sdp, &rlist, bstart);
|
|
bstart = bn;
|
|
blen = 1;
|
|
}
|
|
blks++;
|
|
}
|
|
if (bstart)
|
|
gfs2_rlist_add(sdp, &rlist, bstart);
|
|
else
|
|
goto out;
|
|
|
|
gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
|
|
|
|
for (x = 0; x < rlist.rl_rgrps; x++) {
|
|
struct gfs2_rgrpd *rgd;
|
|
rgd = get_gl2rgd(rlist.rl_ghs[x].gh_gl);
|
|
rg_blocks += rgd->rd_ri.ri_length;
|
|
}
|
|
|
|
error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
|
|
if (error)
|
|
goto out_rlist_free;
|
|
|
|
error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
|
|
RES_INDIRECT + RES_STATFS +
|
|
RES_QUOTA, blks);
|
|
if (error)
|
|
goto out_gunlock;
|
|
|
|
gfs2_trans_add_bh(ip->i_gl, indbh);
|
|
|
|
eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
|
|
bstart = 0;
|
|
blen = 0;
|
|
|
|
for (; eablk < end; eablk++) {
|
|
uint64_t bn;
|
|
|
|
if (!*eablk)
|
|
break;
|
|
bn = be64_to_cpu(*eablk);
|
|
|
|
if (bstart + blen == bn)
|
|
blen++;
|
|
else {
|
|
if (bstart)
|
|
gfs2_free_meta(ip, bstart, blen);
|
|
bstart = bn;
|
|
blen = 1;
|
|
}
|
|
|
|
*eablk = 0;
|
|
if (!ip->i_di.di_blocks)
|
|
gfs2_consist_inode(ip);
|
|
ip->i_di.di_blocks--;
|
|
}
|
|
if (bstart)
|
|
gfs2_free_meta(ip, bstart, blen);
|
|
|
|
ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (!error) {
|
|
gfs2_trans_add_bh(ip->i_gl, dibh);
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
brelse(dibh);
|
|
}
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
out_gunlock:
|
|
gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
|
|
|
|
out_rlist_free:
|
|
gfs2_rlist_free(&rlist);
|
|
|
|
out:
|
|
brelse(indbh);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int ea_dealloc_block(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = ip->i_sbd;
|
|
struct gfs2_alloc *al = &ip->i_alloc;
|
|
struct gfs2_rgrpd *rgd;
|
|
struct buffer_head *dibh;
|
|
int error;
|
|
|
|
rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
|
|
if (!rgd) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
|
|
&al->al_rgd_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
|
|
RES_STATFS + RES_QUOTA, 1);
|
|
if (error)
|
|
goto out_gunlock;
|
|
|
|
gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
|
|
|
|
ip->i_di.di_eattr = 0;
|
|
if (!ip->i_di.di_blocks)
|
|
gfs2_consist_inode(ip);
|
|
ip->i_di.di_blocks--;
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (!error) {
|
|
gfs2_trans_add_bh(ip->i_gl, dibh);
|
|
gfs2_dinode_out(&ip->i_di, dibh->b_data);
|
|
brelse(dibh);
|
|
}
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
out_gunlock:
|
|
gfs2_glock_dq_uninit(&al->al_rgd_gh);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_ea_dealloc - deallocate the extended attribute fork
|
|
* @ip: the inode
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
int gfs2_ea_dealloc(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_alloc *al;
|
|
int error;
|
|
|
|
al = gfs2_alloc_get(ip);
|
|
|
|
error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
|
|
if (error)
|
|
goto out_alloc;
|
|
|
|
error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
|
|
if (error)
|
|
goto out_quota;
|
|
|
|
error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
|
|
if (error)
|
|
goto out_rindex;
|
|
|
|
if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
|
|
error = ea_dealloc_indirect(ip);
|
|
if (error)
|
|
goto out_rindex;
|
|
}
|
|
|
|
error = ea_dealloc_block(ip);
|
|
|
|
out_rindex:
|
|
gfs2_glock_dq_uninit(&al->al_ri_gh);
|
|
|
|
out_quota:
|
|
gfs2_quota_unhold(ip);
|
|
|
|
out_alloc:
|
|
gfs2_alloc_put(ip);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_get_eattr_meta - return all the eattr blocks of a file
|
|
* @dip: the directory
|
|
* @ub: the structure representing the user buffer to copy to
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
int gfs2_get_eattr_meta(struct gfs2_inode *ip, struct gfs2_user_buffer *ub)
|
|
{
|
|
struct buffer_head *bh;
|
|
int error;
|
|
|
|
error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
|
|
DIO_START | DIO_WAIT, &bh);
|
|
if (error)
|
|
return error;
|
|
|
|
gfs2_add_bh_to_ub(ub, bh);
|
|
|
|
if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
|
|
struct buffer_head *eabh;
|
|
uint64_t *eablk, *end;
|
|
|
|
if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
eablk = (uint64_t *)(bh->b_data +
|
|
sizeof(struct gfs2_meta_header));
|
|
end = eablk + ip->i_sbd->sd_inptrs;
|
|
|
|
for (; eablk < end; eablk++) {
|
|
uint64_t bn;
|
|
|
|
if (!*eablk)
|
|
break;
|
|
bn = be64_to_cpu(*eablk);
|
|
|
|
error = gfs2_meta_read(ip->i_gl, bn,
|
|
DIO_START | DIO_WAIT, &eabh);
|
|
if (error)
|
|
break;
|
|
gfs2_add_bh_to_ub(ub, eabh);
|
|
brelse(eabh);
|
|
if (error)
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
brelse(bh);
|
|
|
|
return error;
|
|
}
|
|
|