mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-20 14:16:02 +00:00
![Jeff Layton](/assets/img/avatar_default.png)
In later patches, we're going to change how the inode's ctime field is used. Switch to using accessor functions instead of raw accesses of inode->i_ctime. Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Jan Kara <jack@suse.cz> Message-Id: <20230705190309.579783-45-jlayton@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org>
1507 lines
33 KiB
C
1507 lines
33 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/xattr.h>
|
|
#include <linux/gfs2_ondisk.h>
|
|
#include <linux/posix_acl_xattr.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "incore.h"
|
|
#include "acl.h"
|
|
#include "xattr.h"
|
|
#include "glock.h"
|
|
#include "inode.h"
|
|
#include "meta_io.h"
|
|
#include "quota.h"
|
|
#include "rgrp.h"
|
|
#include "super.h"
|
|
#include "trans.h"
|
|
#include "util.h"
|
|
|
|
/*
|
|
* ea_calc_size - returns the actual number of bytes the request will take up
|
|
* (not counting any unstuffed data blocks)
|
|
*
|
|
* Returns: 1 if the EA should be stuffed
|
|
*/
|
|
|
|
static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,
|
|
unsigned int *size)
|
|
{
|
|
unsigned int jbsize = sdp->sd_jbsize;
|
|
|
|
/* Stuffed */
|
|
*size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
|
|
|
|
if (*size <= jbsize)
|
|
return 1;
|
|
|
|
/* Unstuffed */
|
|
*size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
|
|
(sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)
|
|
{
|
|
unsigned int size;
|
|
|
|
if (dsize > GFS2_EA_MAX_DATA_LEN)
|
|
return -ERANGE;
|
|
|
|
ea_calc_size(sdp, nsize, dsize, &size);
|
|
|
|
/* This can only happen with 512 byte blocks */
|
|
if (size > sdp->sd_jbsize)
|
|
return -ERANGE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool gfs2_eatype_valid(struct gfs2_sbd *sdp, u8 type)
|
|
{
|
|
switch(sdp->sd_sb.sb_fs_format) {
|
|
case GFS2_FS_FORMAT_MAX:
|
|
return true;
|
|
|
|
case GFS2_FS_FORMAT_MIN:
|
|
return type <= GFS2_EATYPE_SECURITY;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
|
|
struct gfs2_ea_header *ea,
|
|
struct gfs2_ea_header *prev, void *private);
|
|
|
|
static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
|
|
ea_call_t ea_call, void *data)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_ea_header *ea, *prev = NULL;
|
|
int error = 0;
|
|
|
|
if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
|
|
return -EIO;
|
|
|
|
for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
|
|
if (!GFS2_EA_REC_LEN(ea))
|
|
goto fail;
|
|
if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
|
|
bh->b_data + bh->b_size))
|
|
goto fail;
|
|
if (!gfs2_eatype_valid(sdp, ea->ea_type))
|
|
goto fail;
|
|
error = ea_call(ip, bh, ea, prev, data);
|
|
if (error)
|
|
return error;
|
|
|
|
if (GFS2_EA_IS_LAST(ea)) {
|
|
if ((char *)GFS2_EA2NEXT(ea) !=
|
|
bh->b_data + bh->b_size)
|
|
goto fail;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return error;
|
|
|
|
fail:
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
|
|
{
|
|
struct buffer_head *bh, *eabh;
|
|
__be64 *eablk, *end;
|
|
int error;
|
|
|
|
error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &bh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
|
|
error = ea_foreach_i(ip, bh, ea_call, data);
|
|
goto out;
|
|
}
|
|
|
|
if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
|
|
end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
|
|
|
|
for (; eablk < end; eablk++) {
|
|
u64 bn;
|
|
|
|
if (!*eablk)
|
|
break;
|
|
bn = be64_to_cpu(*eablk);
|
|
|
|
error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, 0, &eabh);
|
|
if (error)
|
|
break;
|
|
error = ea_foreach_i(ip, eabh, ea_call, data);
|
|
brelse(eabh);
|
|
if (error)
|
|
break;
|
|
}
|
|
out:
|
|
brelse(bh);
|
|
return error;
|
|
}
|
|
|
|
struct ea_find {
|
|
int type;
|
|
const char *name;
|
|
size_t namel;
|
|
struct gfs2_ea_location *ef_el;
|
|
};
|
|
|
|
static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
|
|
struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
|
|
void *private)
|
|
{
|
|
struct ea_find *ef = private;
|
|
|
|
if (ea->ea_type == GFS2_EATYPE_UNUSED)
|
|
return 0;
|
|
|
|
if (ea->ea_type == ef->type) {
|
|
if (ea->ea_name_len == ef->namel &&
|
|
!memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {
|
|
struct gfs2_ea_location *el = ef->ef_el;
|
|
get_bh(bh);
|
|
el->el_bh = bh;
|
|
el->el_ea = ea;
|
|
el->el_prev = prev;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
|
|
struct gfs2_ea_location *el)
|
|
{
|
|
struct ea_find ef;
|
|
int error;
|
|
|
|
ef.type = type;
|
|
ef.name = name;
|
|
ef.namel = strlen(name);
|
|
ef.ef_el = el;
|
|
|
|
memset(el, 0, sizeof(struct gfs2_ea_location));
|
|
|
|
error = ea_foreach(ip, ea_find_i, &ef);
|
|
if (error > 0)
|
|
return 0;
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* ea_dealloc_unstuffed
|
|
*
|
|
* Take advantage of the fact that all unstuffed blocks are
|
|
* allocated from the same RG. But watch, this may not always
|
|
* be true.
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
|
|
struct gfs2_ea_header *ea,
|
|
struct gfs2_ea_header *prev, void *private)
|
|
{
|
|
int *leave = private;
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_rgrpd *rgd;
|
|
struct gfs2_holder rg_gh;
|
|
__be64 *dataptrs;
|
|
u64 bn = 0;
|
|
u64 bstart = 0;
|
|
unsigned int blen = 0;
|
|
unsigned int blks = 0;
|
|
unsigned int x;
|
|
int error;
|
|
|
|
error = gfs2_rindex_update(sdp);
|
|
if (error)
|
|
return error;
|
|
|
|
if (GFS2_EA_IS_STUFFED(ea))
|
|
return 0;
|
|
|
|
dataptrs = GFS2_EA2DATAPTRS(ea);
|
|
for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
|
|
if (*dataptrs) {
|
|
blks++;
|
|
bn = be64_to_cpu(*dataptrs);
|
|
}
|
|
}
|
|
if (!blks)
|
|
return 0;
|
|
|
|
rgd = gfs2_blk2rgrpd(sdp, bn, 1);
|
|
if (!rgd) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
|
|
LM_FLAG_NODE_SCOPE, &rg_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
|
|
RES_EATTR + RES_STATFS + RES_QUOTA, blks);
|
|
if (error)
|
|
goto out_gunlock;
|
|
|
|
gfs2_trans_add_meta(ip->i_gl, bh);
|
|
|
|
dataptrs = GFS2_EA2DATAPTRS(ea);
|
|
for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
|
|
if (!*dataptrs)
|
|
break;
|
|
bn = be64_to_cpu(*dataptrs);
|
|
|
|
if (bstart + blen == bn)
|
|
blen++;
|
|
else {
|
|
if (bstart)
|
|
gfs2_free_meta(ip, rgd, bstart, blen);
|
|
bstart = bn;
|
|
blen = 1;
|
|
}
|
|
|
|
*dataptrs = 0;
|
|
gfs2_add_inode_blocks(&ip->i_inode, -1);
|
|
}
|
|
if (bstart)
|
|
gfs2_free_meta(ip, rgd, bstart, blen);
|
|
|
|
if (prev && !leave) {
|
|
u32 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;
|
|
ea->ea_num_ptrs = 0;
|
|
}
|
|
|
|
inode_set_ctime_current(&ip->i_inode);
|
|
__mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC);
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
out_gunlock:
|
|
gfs2_glock_dq_uninit(&rg_gh);
|
|
return error;
|
|
}
|
|
|
|
static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
|
|
struct gfs2_ea_header *ea,
|
|
struct gfs2_ea_header *prev, int leave)
|
|
{
|
|
int error;
|
|
|
|
error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
|
|
if (error)
|
|
goto out_alloc;
|
|
|
|
error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
|
|
|
|
gfs2_quota_unhold(ip);
|
|
out_alloc:
|
|
return error;
|
|
}
|
|
|
|
struct ea_list {
|
|
struct gfs2_ea_request *ei_er;
|
|
unsigned int ei_size;
|
|
};
|
|
|
|
static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
|
|
struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
|
|
void *private)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct ea_list *ei = private;
|
|
struct gfs2_ea_request *er = ei->ei_er;
|
|
unsigned int ea_size;
|
|
char *prefix;
|
|
unsigned int l;
|
|
|
|
if (ea->ea_type == GFS2_EATYPE_UNUSED)
|
|
return 0;
|
|
|
|
BUG_ON(ea->ea_type > GFS2_EATYPE_SECURITY &&
|
|
sdp->sd_sb.sb_fs_format == GFS2_FS_FORMAT_MIN);
|
|
switch (ea->ea_type) {
|
|
case GFS2_EATYPE_USR:
|
|
prefix = "user.";
|
|
l = 5;
|
|
break;
|
|
case GFS2_EATYPE_SYS:
|
|
prefix = "system.";
|
|
l = 7;
|
|
break;
|
|
case GFS2_EATYPE_SECURITY:
|
|
prefix = "security.";
|
|
l = 9;
|
|
break;
|
|
case GFS2_EATYPE_TRUSTED:
|
|
prefix = "trusted.";
|
|
l = 8;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
ea_size = l + ea->ea_name_len + 1;
|
|
if (er->er_data_len) {
|
|
if (ei->ei_size + ea_size > er->er_data_len)
|
|
return -ERANGE;
|
|
|
|
memcpy(er->er_data + ei->ei_size, prefix, l);
|
|
memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
|
|
ea->ea_name_len);
|
|
er->er_data[ei->ei_size + ea_size - 1] = 0;
|
|
}
|
|
|
|
ei->ei_size += ea_size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_listxattr - List gfs2 extended attributes
|
|
* @dentry: The dentry whose inode we are interested in
|
|
* @buffer: The buffer to write the results
|
|
* @size: The size of the buffer
|
|
*
|
|
* Returns: actual size of data on success, -errno on error
|
|
*/
|
|
|
|
ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(d_inode(dentry));
|
|
struct gfs2_ea_request er;
|
|
struct gfs2_holder i_gh;
|
|
int error;
|
|
|
|
memset(&er, 0, sizeof(struct gfs2_ea_request));
|
|
if (size) {
|
|
er.er_data = buffer;
|
|
er.er_data_len = size;
|
|
}
|
|
|
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (ip->i_eattr) {
|
|
struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
|
|
|
|
error = ea_foreach(ip, ea_list_i, &ei);
|
|
if (!error)
|
|
error = ei.ei_size;
|
|
}
|
|
|
|
gfs2_glock_dq_uninit(&i_gh);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_iter_unstuffed - copies the unstuffed xattr data to/from the
|
|
* request buffer
|
|
* @ip: The GFS2 inode
|
|
* @ea: The extended attribute header structure
|
|
* @din: The data to be copied in
|
|
* @dout: The data to be copied out (one of din,dout will be NULL)
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
|
|
const char *din, char *dout)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct buffer_head **bh;
|
|
unsigned int amount = GFS2_EA_DATA_LEN(ea);
|
|
unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
|
|
__be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
|
|
unsigned int x;
|
|
int error = 0;
|
|
unsigned char *pos;
|
|
unsigned cp_size;
|
|
|
|
bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
|
|
if (!bh)
|
|
return -ENOMEM;
|
|
|
|
for (x = 0; x < nptrs; x++) {
|
|
error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, 0,
|
|
bh + x);
|
|
if (error) {
|
|
while (x--)
|
|
brelse(bh[x]);
|
|
goto out;
|
|
}
|
|
dataptrs++;
|
|
}
|
|
|
|
for (x = 0; x < nptrs; x++) {
|
|
error = gfs2_meta_wait(sdp, bh[x]);
|
|
if (error) {
|
|
for (; x < nptrs; x++)
|
|
brelse(bh[x]);
|
|
goto out;
|
|
}
|
|
if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
|
|
for (; x < nptrs; x++)
|
|
brelse(bh[x]);
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
pos = bh[x]->b_data + sizeof(struct gfs2_meta_header);
|
|
cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize;
|
|
|
|
if (dout) {
|
|
memcpy(dout, pos, cp_size);
|
|
dout += sdp->sd_jbsize;
|
|
}
|
|
|
|
if (din) {
|
|
gfs2_trans_add_meta(ip->i_gl, bh[x]);
|
|
memcpy(pos, din, cp_size);
|
|
din += sdp->sd_jbsize;
|
|
}
|
|
|
|
amount -= sdp->sd_jbsize;
|
|
brelse(bh[x]);
|
|
}
|
|
|
|
out:
|
|
kfree(bh);
|
|
return error;
|
|
}
|
|
|
|
static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
|
|
char *data, size_t size)
|
|
{
|
|
int ret;
|
|
size_t len = GFS2_EA_DATA_LEN(el->el_ea);
|
|
if (len > size)
|
|
return -ERANGE;
|
|
|
|
if (GFS2_EA_IS_STUFFED(el->el_ea)) {
|
|
memcpy(data, GFS2_EA2DATA(el->el_ea), len);
|
|
return len;
|
|
}
|
|
ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data);
|
|
if (ret < 0)
|
|
return ret;
|
|
return len;
|
|
}
|
|
|
|
int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
|
|
{
|
|
struct gfs2_ea_location el;
|
|
int error;
|
|
int len;
|
|
char *data;
|
|
|
|
error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
|
|
if (error)
|
|
return error;
|
|
if (!el.el_ea)
|
|
goto out;
|
|
if (!GFS2_EA_DATA_LEN(el.el_ea))
|
|
goto out;
|
|
|
|
len = GFS2_EA_DATA_LEN(el.el_ea);
|
|
data = kmalloc(len, GFP_NOFS);
|
|
error = -ENOMEM;
|
|
if (data == NULL)
|
|
goto out;
|
|
|
|
error = gfs2_ea_get_copy(ip, &el, data, len);
|
|
if (error < 0)
|
|
kfree(data);
|
|
else
|
|
*ppdata = data;
|
|
out:
|
|
brelse(el.el_bh);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* __gfs2_xattr_get - Get a GFS2 extended attribute
|
|
* @inode: The inode
|
|
* @name: The name of the extended attribute
|
|
* @buffer: The buffer to write the result into
|
|
* @size: The size of the buffer
|
|
* @type: The type of extended attribute
|
|
*
|
|
* Returns: actual size of data on success, -errno on error
|
|
*/
|
|
static int __gfs2_xattr_get(struct inode *inode, const char *name,
|
|
void *buffer, size_t size, int type)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(inode);
|
|
struct gfs2_ea_location el;
|
|
int error;
|
|
|
|
if (!ip->i_eattr)
|
|
return -ENODATA;
|
|
if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
|
|
return -EINVAL;
|
|
|
|
error = gfs2_ea_find(ip, type, name, &el);
|
|
if (error)
|
|
return error;
|
|
if (!el.el_ea)
|
|
return -ENODATA;
|
|
if (size)
|
|
error = gfs2_ea_get_copy(ip, &el, buffer, size);
|
|
else
|
|
error = GFS2_EA_DATA_LEN(el.el_ea);
|
|
brelse(el.el_bh);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int gfs2_xattr_get(const struct xattr_handler *handler,
|
|
struct dentry *unused, struct inode *inode,
|
|
const char *name, void *buffer, size_t size)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(inode);
|
|
struct gfs2_holder gh;
|
|
int ret;
|
|
|
|
/* During lookup, SELinux calls this function with the glock locked. */
|
|
|
|
if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
|
|
ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
|
|
if (ret)
|
|
return ret;
|
|
} else {
|
|
gfs2_holder_mark_uninitialized(&gh);
|
|
}
|
|
ret = __gfs2_xattr_get(inode, name, buffer, size, handler->flags);
|
|
if (gfs2_holder_initialized(&gh))
|
|
gfs2_glock_dq_uninit(&gh);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ea_alloc_blk - allocates a new block for extended attributes.
|
|
* @ip: A pointer to the inode that's getting extended attributes
|
|
* @bhp: Pointer to pointer to a struct buffer_head
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_ea_header *ea;
|
|
unsigned int n = 1;
|
|
u64 block;
|
|
int error;
|
|
|
|
error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
|
|
if (error)
|
|
return error;
|
|
gfs2_trans_remove_revoke(sdp, block, 1);
|
|
*bhp = gfs2_meta_new(ip->i_gl, block);
|
|
gfs2_trans_add_meta(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;
|
|
|
|
gfs2_add_inode_blocks(&ip->i_inode, 1);
|
|
|
|
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 = GFS2_SB(&ip->i_inode);
|
|
int error;
|
|
|
|
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 {
|
|
__be64 *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_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
|
|
for (x = 0; x < ea->ea_num_ptrs; x++) {
|
|
struct buffer_head *bh;
|
|
u64 block;
|
|
int mh_size = sizeof(struct gfs2_meta_header);
|
|
unsigned int n = 1;
|
|
|
|
error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
|
|
if (error)
|
|
return error;
|
|
gfs2_trans_remove_revoke(sdp, block, 1);
|
|
bh = gfs2_meta_new(ip->i_gl, block);
|
|
gfs2_trans_add_meta(ip->i_gl, bh);
|
|
gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
|
|
|
|
gfs2_add_inode_blocks(&ip->i_inode, 1);
|
|
|
|
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(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_parms ap = { .target = blks };
|
|
int error;
|
|
|
|
error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_quota_lock_check(ip, &ap);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_inplace_reserve(ip, &ap);
|
|
if (error)
|
|
goto out_gunlock_q;
|
|
|
|
error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
|
|
blks + gfs2_rg_blocks(ip, blks) +
|
|
RES_DINODE + RES_STATFS + RES_QUOTA, 0);
|
|
if (error)
|
|
goto out_ipres;
|
|
|
|
error = skeleton_call(ip, er, private);
|
|
if (error)
|
|
goto out_end_trans;
|
|
|
|
inode_set_ctime_current(&ip->i_inode);
|
|
__mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC);
|
|
|
|
out_end_trans:
|
|
gfs2_trans_end(GFS2_SB(&ip->i_inode));
|
|
out_ipres:
|
|
gfs2_inplace_release(ip);
|
|
out_gunlock_q:
|
|
gfs2_quota_unlock(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_eattr = bh->b_blocknr;
|
|
error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
|
|
|
|
brelse(bh);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* ea_init - initializes a new eattr block
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
static int ea_init(struct gfs2_inode *ip, int type, const char *name,
|
|
const void *data, size_t size)
|
|
{
|
|
struct gfs2_ea_request er;
|
|
unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
|
|
unsigned int blks = 1;
|
|
|
|
er.er_type = type;
|
|
er.er_name = name;
|
|
er.er_name_len = strlen(name);
|
|
er.er_data = (void *)data;
|
|
er.er_data_len = size;
|
|
|
|
if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
|
|
blks += DIV_ROUND_UP(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)
|
|
{
|
|
u32 ea_size = GFS2_EA_SIZE(ea);
|
|
struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
|
|
ea_size);
|
|
u32 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;
|
|
u32 len;
|
|
|
|
gfs2_trans_add_meta(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(GFS2_SB(&ip->i_inode), 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;
|
|
int error;
|
|
|
|
error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
gfs2_trans_add_meta(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);
|
|
|
|
inode_set_ctime_current(&ip->i_inode);
|
|
__mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC);
|
|
|
|
gfs2_trans_end(GFS2_SB(&ip->i_inode));
|
|
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_meta(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(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
|
|
es->es_er->er_data_len, &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_ROUND_UP(es->es_er->er_data_len,
|
|
GFS2_SB(&ip->i_inode)->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 = GFS2_SB(&ip->i_inode);
|
|
struct buffer_head *indbh, *newbh;
|
|
__be64 *eablk;
|
|
int error;
|
|
int mh_size = sizeof(struct gfs2_meta_header);
|
|
|
|
if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
|
|
__be64 *end;
|
|
|
|
error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0,
|
|
&indbh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
eablk = (__be64 *)(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_meta(ip->i_gl, indbh);
|
|
} else {
|
|
u64 blk;
|
|
unsigned int n = 1;
|
|
error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
|
|
if (error)
|
|
return error;
|
|
gfs2_trans_remove_revoke(sdp, blk, 1);
|
|
indbh = gfs2_meta_new(ip->i_gl, blk);
|
|
gfs2_trans_add_meta(ip->i_gl, indbh);
|
|
gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
|
|
gfs2_buffer_clear_tail(indbh, mh_size);
|
|
|
|
eablk = (__be64 *)(indbh->b_data + mh_size);
|
|
*eablk = cpu_to_be64(ip->i_eattr);
|
|
ip->i_eattr = blk;
|
|
ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
|
|
gfs2_add_inode_blocks(&ip->i_inode, 1);
|
|
|
|
eablk++;
|
|
}
|
|
|
|
error = ea_alloc_blk(ip, &newbh);
|
|
if (error)
|
|
goto out;
|
|
|
|
*eablk = cpu_to_be64((u64)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, private);
|
|
|
|
out:
|
|
brelse(indbh);
|
|
return error;
|
|
}
|
|
|
|
static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
|
|
const void *value, size_t size, struct gfs2_ea_location *el)
|
|
{
|
|
struct gfs2_ea_request er;
|
|
struct ea_set es;
|
|
unsigned int blks = 2;
|
|
int error;
|
|
|
|
er.er_type = type;
|
|
er.er_name = name;
|
|
er.er_data = (void *)value;
|
|
er.er_name_len = strlen(name);
|
|
er.er_data_len = size;
|
|
|
|
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_diskflags & GFS2_DIF_EA_INDIRECT))
|
|
blks++;
|
|
if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
|
|
blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->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(GFS2_SB(&ip->i_inode),
|
|
GFS2_EA2NEXT(el->el_prev) == el->el_ea);
|
|
}
|
|
|
|
return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
|
|
}
|
|
|
|
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;
|
|
int error;
|
|
|
|
error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
gfs2_trans_add_meta(ip->i_gl, el->el_bh);
|
|
|
|
if (prev) {
|
|
u32 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;
|
|
}
|
|
|
|
inode_set_ctime_current(&ip->i_inode);
|
|
__mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC);
|
|
|
|
gfs2_trans_end(GFS2_SB(&ip->i_inode));
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_xattr_remove - Remove a GFS2 extended attribute
|
|
* @ip: The inode
|
|
* @type: The type of the extended attribute
|
|
* @name: The name of the extended attribute
|
|
*
|
|
* This is not called directly by the VFS since we use the (common)
|
|
* scheme of making a "set with NULL data" mean a remove request. Note
|
|
* that this is different from a set with zero length data.
|
|
*
|
|
* Returns: 0, or errno on failure
|
|
*/
|
|
|
|
static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
|
|
{
|
|
struct gfs2_ea_location el;
|
|
int error;
|
|
|
|
if (!ip->i_eattr)
|
|
return -ENODATA;
|
|
|
|
error = gfs2_ea_find(ip, type, name, &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_xattr_set - Set (or remove) a GFS2 extended attribute
|
|
* @inode: The inode
|
|
* @name: The name of the extended attribute
|
|
* @value: The value of the extended attribute (NULL for remove)
|
|
* @size: The size of the @value argument
|
|
* @flags: Create or Replace
|
|
* @type: The type of the extended attribute
|
|
*
|
|
* See gfs2_xattr_remove() for details of the removal of xattrs.
|
|
*
|
|
* Returns: 0 or errno on failure
|
|
*/
|
|
|
|
int __gfs2_xattr_set(struct inode *inode, const char *name,
|
|
const void *value, size_t size, int flags, int type)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(inode);
|
|
struct gfs2_ea_location el;
|
|
unsigned int namel = strlen(name);
|
|
int error;
|
|
|
|
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
|
|
return -EPERM;
|
|
if (namel > GFS2_EA_MAX_NAME_LEN)
|
|
return -ERANGE;
|
|
|
|
if (value == NULL) {
|
|
error = gfs2_xattr_remove(ip, type, name);
|
|
if (error == -ENODATA && !(flags & XATTR_REPLACE))
|
|
error = 0;
|
|
return error;
|
|
}
|
|
|
|
if (ea_check_size(sdp, namel, size))
|
|
return -ERANGE;
|
|
|
|
if (!ip->i_eattr) {
|
|
if (flags & XATTR_REPLACE)
|
|
return -ENODATA;
|
|
return ea_init(ip, type, name, value, size);
|
|
}
|
|
|
|
error = gfs2_ea_find(ip, type, name, &el);
|
|
if (error)
|
|
return error;
|
|
|
|
if (el.el_ea) {
|
|
if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
|
|
brelse(el.el_bh);
|
|
return -EPERM;
|
|
}
|
|
|
|
error = -EEXIST;
|
|
if (!(flags & XATTR_CREATE)) {
|
|
int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
|
|
error = ea_set_i(ip, type, name, value, size, &el);
|
|
if (!error && unstuffed)
|
|
ea_set_remove_unstuffed(ip, &el);
|
|
}
|
|
|
|
brelse(el.el_bh);
|
|
return error;
|
|
}
|
|
|
|
error = -ENODATA;
|
|
if (!(flags & XATTR_REPLACE))
|
|
error = ea_set_i(ip, type, name, value, size, NULL);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int gfs2_xattr_set(const struct xattr_handler *handler,
|
|
struct mnt_idmap *idmap,
|
|
struct dentry *unused, struct inode *inode,
|
|
const char *name, const void *value,
|
|
size_t size, int flags)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(inode);
|
|
struct gfs2_holder gh;
|
|
int ret;
|
|
|
|
ret = gfs2_qa_get(ip);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* May be called from gfs_setattr with the glock locked. */
|
|
|
|
if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
|
|
ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
|
|
if (ret)
|
|
goto out;
|
|
} else {
|
|
if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) {
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
gfs2_holder_mark_uninitialized(&gh);
|
|
}
|
|
ret = __gfs2_xattr_set(inode, name, value, size, flags, handler->flags);
|
|
if (gfs2_holder_initialized(&gh))
|
|
gfs2_glock_dq_uninit(&gh);
|
|
out:
|
|
gfs2_qa_put(ip);
|
|
return ret;
|
|
}
|
|
|
|
static int ea_dealloc_indirect(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_rgrp_list rlist;
|
|
struct gfs2_rgrpd *rgd;
|
|
struct buffer_head *indbh, *dibh;
|
|
__be64 *eablk, *end;
|
|
unsigned int rg_blocks = 0;
|
|
u64 bstart = 0;
|
|
unsigned int blen = 0;
|
|
unsigned int blks = 0;
|
|
unsigned int x;
|
|
int error;
|
|
|
|
error = gfs2_rindex_update(sdp);
|
|
if (error)
|
|
return error;
|
|
|
|
memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
|
|
|
|
error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh);
|
|
if (error)
|
|
return error;
|
|
|
|
if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
|
|
end = eablk + sdp->sd_inptrs;
|
|
|
|
for (; eablk < end; eablk++) {
|
|
u64 bn;
|
|
|
|
if (!*eablk)
|
|
break;
|
|
bn = be64_to_cpu(*eablk);
|
|
|
|
if (bstart + blen == bn)
|
|
blen++;
|
|
else {
|
|
if (bstart)
|
|
gfs2_rlist_add(ip, &rlist, bstart);
|
|
bstart = bn;
|
|
blen = 1;
|
|
}
|
|
blks++;
|
|
}
|
|
if (bstart)
|
|
gfs2_rlist_add(ip, &rlist, bstart);
|
|
else
|
|
goto out;
|
|
|
|
gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE);
|
|
|
|
for (x = 0; x < rlist.rl_rgrps; x++) {
|
|
rgd = gfs2_glock2rgrp(rlist.rl_ghs[x].gh_gl);
|
|
rg_blocks += rgd->rd_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_meta(ip->i_gl, indbh);
|
|
|
|
eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
|
|
bstart = 0;
|
|
rgd = NULL;
|
|
blen = 0;
|
|
|
|
for (; eablk < end; eablk++) {
|
|
u64 bn;
|
|
|
|
if (!*eablk)
|
|
break;
|
|
bn = be64_to_cpu(*eablk);
|
|
|
|
if (bstart + blen == bn)
|
|
blen++;
|
|
else {
|
|
if (bstart)
|
|
gfs2_free_meta(ip, rgd, bstart, blen);
|
|
bstart = bn;
|
|
rgd = gfs2_blk2rgrpd(sdp, bstart, true);
|
|
blen = 1;
|
|
}
|
|
|
|
*eablk = 0;
|
|
gfs2_add_inode_blocks(&ip->i_inode, -1);
|
|
}
|
|
if (bstart)
|
|
gfs2_free_meta(ip, rgd, bstart, blen);
|
|
|
|
ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
|
|
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (!error) {
|
|
gfs2_trans_add_meta(ip->i_gl, dibh);
|
|
gfs2_dinode_out(ip, 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 = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_rgrpd *rgd;
|
|
struct buffer_head *dibh;
|
|
struct gfs2_holder gh;
|
|
int error;
|
|
|
|
error = gfs2_rindex_update(sdp);
|
|
if (error)
|
|
return error;
|
|
|
|
rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1);
|
|
if (!rgd) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
|
|
LM_FLAG_NODE_SCOPE, &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, rgd, ip->i_eattr, 1);
|
|
|
|
ip->i_eattr = 0;
|
|
gfs2_add_inode_blocks(&ip->i_inode, -1);
|
|
|
|
if (likely(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags))) {
|
|
error = gfs2_meta_inode_buffer(ip, &dibh);
|
|
if (!error) {
|
|
gfs2_trans_add_meta(ip->i_gl, dibh);
|
|
gfs2_dinode_out(ip, dibh->b_data);
|
|
brelse(dibh);
|
|
}
|
|
}
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
out_gunlock:
|
|
gfs2_glock_dq_uninit(&gh);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_ea_dealloc - deallocate the extended attribute fork
|
|
* @ip: the inode
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
int gfs2_ea_dealloc(struct gfs2_inode *ip)
|
|
{
|
|
int error;
|
|
|
|
error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
|
|
if (error)
|
|
return error;
|
|
|
|
if (likely(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags))) {
|
|
error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
|
|
if (error)
|
|
goto out_quota;
|
|
|
|
if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
|
|
error = ea_dealloc_indirect(ip);
|
|
if (error)
|
|
goto out_quota;
|
|
}
|
|
}
|
|
|
|
error = ea_dealloc_block(ip);
|
|
|
|
out_quota:
|
|
gfs2_quota_unhold(ip);
|
|
return error;
|
|
}
|
|
|
|
static const struct xattr_handler gfs2_xattr_user_handler = {
|
|
.prefix = XATTR_USER_PREFIX,
|
|
.flags = GFS2_EATYPE_USR,
|
|
.get = gfs2_xattr_get,
|
|
.set = gfs2_xattr_set,
|
|
};
|
|
|
|
static const struct xattr_handler gfs2_xattr_security_handler = {
|
|
.prefix = XATTR_SECURITY_PREFIX,
|
|
.flags = GFS2_EATYPE_SECURITY,
|
|
.get = gfs2_xattr_get,
|
|
.set = gfs2_xattr_set,
|
|
};
|
|
|
|
static bool
|
|
gfs2_xattr_trusted_list(struct dentry *dentry)
|
|
{
|
|
return capable(CAP_SYS_ADMIN);
|
|
}
|
|
|
|
static const struct xattr_handler gfs2_xattr_trusted_handler = {
|
|
.prefix = XATTR_TRUSTED_PREFIX,
|
|
.flags = GFS2_EATYPE_TRUSTED,
|
|
.list = gfs2_xattr_trusted_list,
|
|
.get = gfs2_xattr_get,
|
|
.set = gfs2_xattr_set,
|
|
};
|
|
|
|
const struct xattr_handler *gfs2_xattr_handlers_max[] = {
|
|
/* GFS2_FS_FORMAT_MAX */
|
|
&gfs2_xattr_trusted_handler,
|
|
|
|
/* GFS2_FS_FORMAT_MIN */
|
|
&gfs2_xattr_user_handler,
|
|
&gfs2_xattr_security_handler,
|
|
NULL,
|
|
};
|
|
|
|
const struct xattr_handler **gfs2_xattr_handlers_min = gfs2_xattr_handlers_max + 1;
|