EXTRA_CFLAGS := -I$(src)
obj-$(CONFIG_GFS2_FS) += gfs2.o
-gfs2-y := acl.o bmap.o dir.o eattr.o glock.o \
+gfs2-y := acl.o bmap.o dir.o xattr.o glock.o \
glops.o inode.o log.o lops.o main.o meta_io.o \
aops.o dentry.o export.o file.o \
ops_fstype.o ops_inode.o quota.o \
#include "gfs2.h"
#include "incore.h"
#include "acl.h"
-#include "eattr.h"
+#include "xattr.h"
#include "glock.h"
#include "inode.h"
#include "meta_io.h"
+++ /dev/null
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#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 <asm/uaccess.h>
-
-#include "gfs2.h"
-#include "incore.h"
-#include "acl.h"
-#include "eattr.h"
-#include "glock.h"
-#include "inode.h"
-#include "meta_io.h"
-#include "quota.h"
-#include "rgrp.h"
-#include "trans.h"
-#include "util.h"
-
-/**
- * ea_calc_size - returns the acutal number of bytes the request will take up
- * (not counting any unstuffed data blocks)
- * @sdp:
- * @er:
- * @size:
- *
- * 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;
-}
-
-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_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(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, &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, &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;
-}
-
-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 -
- * @ip:
- * @bh:
- * @ea:
- * @prev:
- * @private:
- *
- * 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;
- struct buffer_head *dibh;
- __be64 *dataptrs;
- u64 bn = 0;
- u64 bstart = 0;
- unsigned int blen = 0;
- unsigned int blks = 0;
- unsigned int x;
- int 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);
- if (!rgd) {
- gfs2_consist_inode(ip);
- return -EIO;
- }
-
- error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &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_bh(ip->i_gl, bh, 1);
-
- 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, bstart, blen);
- bstart = bn;
- blen = 1;
- }
-
- *dataptrs = 0;
- gfs2_add_inode_blocks(&ip->i_inode, -1);
- }
- if (bstart)
- gfs2_free_meta(ip, 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;
- }
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (!error) {
- ip->i_inode.i_ctime = CURRENT_TIME;
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
- }
-
- 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)
-{
- struct gfs2_alloc *al;
- int error;
-
- al = gfs2_alloc_get(ip);
- if (!al)
- return -ENOMEM;
-
- error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
- if (error)
- goto out_alloc;
-
- error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
- if (error)
- goto out_quota;
-
- error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
-
- gfs2_glock_dq_uninit(&al->al_ri_gh);
-
-out_quota:
- gfs2_quota_unhold(ip);
-out_alloc:
- gfs2_alloc_put(ip);
- return error;
-}
-
-struct ea_list {
- struct gfs2_ea_request *ei_er;
- unsigned int ei_size;
-};
-
-static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
-{
- switch (ea->ea_type) {
- case GFS2_EATYPE_USR:
- return 5 + ea->ea_name_len + 1;
- case GFS2_EATYPE_SYS:
- return 7 + ea->ea_name_len + 1;
- case GFS2_EATYPE_SECURITY:
- return 9 + ea->ea_name_len + 1;
- default:
- return 0;
- }
-}
-
-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 ea_list *ei = private;
- struct gfs2_ea_request *er = ei->ei_er;
- unsigned int ea_size = gfs2_ea_strlen(ea);
-
- if (ea->ea_type == GFS2_EATYPE_UNUSED)
- return 0;
-
- if (er->er_data_len) {
- char *prefix = NULL;
- unsigned int l = 0;
- char c = 0;
-
- if (ei->ei_size + ea_size > er->er_data_len)
- return -ERANGE;
-
- 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;
- }
-
- BUG_ON(l == 0);
-
- memcpy(er->er_data + ei->ei_size, prefix, l);
- memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
- ea->ea_name_len);
- memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
- }
-
- 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(dentry->d_inode);
- 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;
-}
-
-/**
- * ea_get_unstuffed - actually copies the unstuffed data into the
- * request buffer
- * @ip: The GFS2 inode
- * @ea: The extended attribute header structure
- * @data: The data to be copied
- *
- * Returns: errno
- */
-
-static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
- char *data)
-{
- 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;
-
- 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,
- 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;
- }
-
- memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
- (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
-
- amount -= sdp->sd_jbsize;
- data += sdp->sd_jbsize;
-
- brelse(bh[x]);
- }
-
-out:
- kfree(bh);
- return error;
-}
-
-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 = ea_get_unstuffed(ip, el->el_ea, data);
- if (ret < 0)
- return ret;
- return len;
-}
-
-/**
- * gfs2_xattr_get - Get a GFS2 extended attribute
- * @inode: The inode
- * @type: The type of extended attribute
- * @name: The name of the extended attribute
- * @buffer: The buffer to write the result into
- * @size: The size of the buffer
- *
- * Returns: actual size of data on success, -errno on error
- */
-
-int gfs2_xattr_get(struct inode *inode, int type, const char *name,
- void *buffer, size_t size)
-{
- 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;
-}
-
-/**
- * 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_block(ip, &block, &n);
- if (error)
- return error;
- gfs2_trans_add_unrevoke(sdp, block, 1);
- *bhp = gfs2_meta_new(ip->i_gl, block);
- gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
- 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_block(ip, &block, &n);
- if (error)
- return error;
- gfs2_trans_add_unrevoke(sdp, block, 1);
- bh = gfs2_meta_new(ip->i_gl, block);
- gfs2_trans_add_bh(ip->i_gl, bh, 1);
- 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 *al;
- struct buffer_head *dibh;
- int error;
-
- al = gfs2_alloc_get(ip);
- if (!al)
- return -ENOMEM;
-
- error = gfs2_quota_lock_check(ip);
- if (error)
- goto out;
-
- al->al_requested = blks;
-
- error = gfs2_inplace_reserve(ip);
- if (error)
- goto out_gunlock_q;
-
- error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
- blks + al->al_rgd->rd_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) {
- ip->i_inode.i_ctime = CURRENT_TIME;
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
- }
-
-out_end_trans:
- gfs2_trans_end(GFS2_SB(&ip->i_inode));
-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_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, 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_bh(ip->i_gl, el->el_bh, 1);
-
- 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;
- struct buffer_head *dibh;
- int error;
-
- error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
- if (error)
- return error;
-
- gfs2_trans_add_bh(ip->i_gl, bh, 1);
-
- 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;
- ip->i_inode.i_ctime = CURRENT_TIME;
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
-out:
- 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_bh(ip->i_gl, es->es_bh, 1);
-
- 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,
- &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_bh(ip->i_gl, indbh, 1);
- } else {
- u64 blk;
- unsigned int n = 1;
- error = gfs2_alloc_block(ip, &blk, &n);
- if (error)
- return error;
- gfs2_trans_add_unrevoke(sdp, blk, 1);
- indbh = gfs2_meta_new(ip->i_gl, blk);
- gfs2_trans_add_bh(ip->i_gl, indbh, 1);
- 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;
- struct buffer_head *dibh;
- int error;
-
- error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
- if (error)
- return error;
-
- gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
-
- 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;
- }
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (!error) {
- ip->i_inode.i_ctime = CURRENT_TIME;
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
- }
-
- gfs2_trans_end(GFS2_SB(&ip->i_inode));
-
- return error;
-}
-
-/**
- * gfs2_xattr_remove - Remove a GFS2 extended attribute
- * @inode: 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 inode *inode, int type, const char *name)
-{
- struct gfs2_inode *ip = GFS2_I(inode);
- 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
- * @type: The type of the extended attribute
- * @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
- *
- * See gfs2_xattr_remove() for details of the removal of xattrs.
- *
- * Returns: 0 or errno on failure
- */
-
-int gfs2_xattr_set(struct inode *inode, int type, const char *name,
- const void *value, size_t size, int flags)
-{
- struct gfs2_sbd *sdp = GFS2_SB(inode);
- struct gfs2_inode *ip = GFS2_I(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)
- return gfs2_xattr_remove(inode, type, name);
-
- 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 ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
- struct gfs2_ea_header *ea, char *data)
-{
- 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;
-
- bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
- 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), 0,
- bh + x);
- if (error) {
- while (x--)
- brelse(bh[x]);
- goto fail;
- }
- dataptrs++;
- }
-
- for (x = 0; x < nptrs; x++) {
- error = gfs2_meta_wait(sdp, bh[x]);
- 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], 1);
-
- 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(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
- if (error)
- return error;
-
- gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
- 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_inode, attr);
- gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, dibh->b_data);
- brelse(dibh);
- }
-
- gfs2_trans_end(GFS2_SB(&ip->i_inode));
-
- return error;
-}
-
-static int ea_dealloc_indirect(struct gfs2_inode *ip)
-{
- struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
- struct gfs2_rgrp_list rlist;
- 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;
-
- memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
-
- error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &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(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);
-
- for (x = 0; x < rlist.rl_rgrps; x++) {
- struct gfs2_rgrpd *rgd;
- rgd = rlist.rl_ghs[x].gh_gl->gl_object;
- 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_bh(ip->i_gl, indbh, 1);
-
- eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
- bstart = 0;
- 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, bstart, blen);
- bstart = bn;
- blen = 1;
- }
-
- *eablk = 0;
- gfs2_add_inode_blocks(&ip->i_inode, -1);
- }
- if (bstart)
- gfs2_free_meta(ip, bstart, blen);
-
- ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (!error) {
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- 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_alloc *al = ip->i_alloc;
- struct gfs2_rgrpd *rgd;
- struct buffer_head *dibh;
- int error;
-
- rgd = gfs2_blk2rgrpd(sdp, ip->i_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_eattr, 1);
-
- ip->i_eattr = 0;
- gfs2_add_inode_blocks(&ip->i_inode, -1);
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (!error) {
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(ip, 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);
- if (!al)
- return -ENOMEM;
-
- error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
- if (error)
- goto out_alloc;
-
- error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &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_diskflags & 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;
-}
-
-static int gfs2_xattr_user_get(struct inode *inode, const char *name,
- void *buffer, size_t size)
-{
- return gfs2_xattr_get(inode, GFS2_EATYPE_USR, name, buffer, size);
-}
-
-static int gfs2_xattr_user_set(struct inode *inode, const char *name,
- const void *value, size_t size, int flags)
-{
- return gfs2_xattr_set(inode, GFS2_EATYPE_USR, name, value, size, flags);
-}
-
-static int gfs2_xattr_system_get(struct inode *inode, const char *name,
- void *buffer, size_t size)
-{
- return gfs2_xattr_get(inode, GFS2_EATYPE_SYS, name, buffer, size);
-}
-
-static int gfs2_xattr_system_set(struct inode *inode, const char *name,
- const void *value, size_t size, int flags)
-{
- return gfs2_xattr_set(inode, GFS2_EATYPE_SYS, name, value, size, flags);
-}
-
-static int gfs2_xattr_security_get(struct inode *inode, const char *name,
- void *buffer, size_t size)
-{
- return gfs2_xattr_get(inode, GFS2_EATYPE_SECURITY, name, buffer, size);
-}
-
-static int gfs2_xattr_security_set(struct inode *inode, const char *name,
- const void *value, size_t size, int flags)
-{
- return gfs2_xattr_set(inode, GFS2_EATYPE_SECURITY, name, value, size, flags);
-}
-
-static struct xattr_handler gfs2_xattr_user_handler = {
- .prefix = XATTR_USER_PREFIX,
- .get = gfs2_xattr_user_get,
- .set = gfs2_xattr_user_set,
-};
-
-static struct xattr_handler gfs2_xattr_security_handler = {
- .prefix = XATTR_SECURITY_PREFIX,
- .get = gfs2_xattr_security_get,
- .set = gfs2_xattr_security_set,
-};
-
-static struct xattr_handler gfs2_xattr_system_handler = {
- .prefix = XATTR_SYSTEM_PREFIX,
- .get = gfs2_xattr_system_get,
- .set = gfs2_xattr_system_set,
-};
-
-struct xattr_handler *gfs2_xattr_handlers[] = {
- &gfs2_xattr_user_handler,
- &gfs2_xattr_security_handler,
- &gfs2_xattr_system_handler,
- NULL,
-};
-
+++ /dev/null
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#ifndef __EATTR_DOT_H__
-#define __EATTR_DOT_H__
-
-struct gfs2_inode;
-struct iattr;
-
-#define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
-#define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
-
-#define GFS2_EA_SIZE(ea) \
-ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
- ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
- (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
-
-#define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
-#define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
-
-#define GFS2_EAREQ_SIZE_STUFFED(er) \
-ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
-
-#define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
-#define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
-
-#define GFS2_EA2DATAPTRS(ea) \
-((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
-
-#define GFS2_EA2NEXT(ea) \
-((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
-
-#define GFS2_EA_BH2FIRST(bh) \
-((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
-
-struct gfs2_ea_request {
- const char *er_name;
- char *er_data;
- unsigned int er_name_len;
- unsigned int er_data_len;
- unsigned int er_type; /* GFS2_EATYPE_... */
-};
-
-struct gfs2_ea_location {
- struct buffer_head *el_bh;
- struct gfs2_ea_header *el_ea;
- struct gfs2_ea_header *el_prev;
-};
-
-extern int gfs2_xattr_get(struct inode *inode, int type, const char *name,
- void *buffer, size_t size);
-extern int gfs2_xattr_set(struct inode *inode, int type, const char *name,
- const void *value, size_t size, int flags);
-extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
-extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
-
-/* Exported to acl.c */
-
-extern int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
- struct gfs2_ea_location *el);
-extern int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
- char *data, size_t size);
-extern int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
- struct iattr *attr, char *data);
-
-#endif /* __EATTR_DOT_H__ */
#include "acl.h"
#include "bmap.h"
#include "dir.h"
-#include "eattr.h"
+#include "xattr.h"
#include "glock.h"
#include "glops.h"
#include "inode.h"
#include "acl.h"
#include "bmap.h"
#include "dir.h"
-#include "eattr.h"
+#include "xattr.h"
#include "glock.h"
#include "inode.h"
#include "meta_io.h"
#include "trans.h"
#include "util.h"
#include "sys.h"
-#include "eattr.h"
+#include "xattr.h"
#define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x)
--- /dev/null
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License version 2.
+ */
+
+#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 <asm/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 "trans.h"
+#include "util.h"
+
+/**
+ * ea_calc_size - returns the acutal number of bytes the request will take up
+ * (not counting any unstuffed data blocks)
+ * @sdp:
+ * @er:
+ * @size:
+ *
+ * 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;
+}
+
+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_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(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, &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, &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;
+}
+
+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 -
+ * @ip:
+ * @bh:
+ * @ea:
+ * @prev:
+ * @private:
+ *
+ * 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;
+ struct buffer_head *dibh;
+ __be64 *dataptrs;
+ u64 bn = 0;
+ u64 bstart = 0;
+ unsigned int blen = 0;
+ unsigned int blks = 0;
+ unsigned int x;
+ int 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);
+ if (!rgd) {
+ gfs2_consist_inode(ip);
+ return -EIO;
+ }
+
+ error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &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_bh(ip->i_gl, bh, 1);
+
+ 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, bstart, blen);
+ bstart = bn;
+ blen = 1;
+ }
+
+ *dataptrs = 0;
+ gfs2_add_inode_blocks(&ip->i_inode, -1);
+ }
+ if (bstart)
+ gfs2_free_meta(ip, 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;
+ }
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (!error) {
+ ip->i_inode.i_ctime = CURRENT_TIME;
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+ gfs2_dinode_out(ip, dibh->b_data);
+ brelse(dibh);
+ }
+
+ 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)
+{
+ struct gfs2_alloc *al;
+ int error;
+
+ al = gfs2_alloc_get(ip);
+ if (!al)
+ return -ENOMEM;
+
+ error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
+ if (error)
+ goto out_alloc;
+
+ error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
+ if (error)
+ goto out_quota;
+
+ error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
+
+ gfs2_glock_dq_uninit(&al->al_ri_gh);
+
+out_quota:
+ gfs2_quota_unhold(ip);
+out_alloc:
+ gfs2_alloc_put(ip);
+ return error;
+}
+
+struct ea_list {
+ struct gfs2_ea_request *ei_er;
+ unsigned int ei_size;
+};
+
+static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
+{
+ switch (ea->ea_type) {
+ case GFS2_EATYPE_USR:
+ return 5 + ea->ea_name_len + 1;
+ case GFS2_EATYPE_SYS:
+ return 7 + ea->ea_name_len + 1;
+ case GFS2_EATYPE_SECURITY:
+ return 9 + ea->ea_name_len + 1;
+ default:
+ return 0;
+ }
+}
+
+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 ea_list *ei = private;
+ struct gfs2_ea_request *er = ei->ei_er;
+ unsigned int ea_size = gfs2_ea_strlen(ea);
+
+ if (ea->ea_type == GFS2_EATYPE_UNUSED)
+ return 0;
+
+ if (er->er_data_len) {
+ char *prefix = NULL;
+ unsigned int l = 0;
+ char c = 0;
+
+ if (ei->ei_size + ea_size > er->er_data_len)
+ return -ERANGE;
+
+ 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;
+ }
+
+ BUG_ON(l == 0);
+
+ memcpy(er->er_data + ei->ei_size, prefix, l);
+ memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
+ ea->ea_name_len);
+ memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
+ }
+
+ 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(dentry->d_inode);
+ 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;
+}
+
+/**
+ * ea_get_unstuffed - actually copies the unstuffed data into the
+ * request buffer
+ * @ip: The GFS2 inode
+ * @ea: The extended attribute header structure
+ * @data: The data to be copied
+ *
+ * Returns: errno
+ */
+
+static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
+ char *data)
+{
+ 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;
+
+ 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,
+ 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;
+ }
+
+ memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
+ (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
+
+ amount -= sdp->sd_jbsize;
+ data += sdp->sd_jbsize;
+
+ brelse(bh[x]);
+ }
+
+out:
+ kfree(bh);
+ return error;
+}
+
+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 = ea_get_unstuffed(ip, el->el_ea, data);
+ if (ret < 0)
+ return ret;
+ return len;
+}
+
+/**
+ * gfs2_xattr_get - Get a GFS2 extended attribute
+ * @inode: The inode
+ * @type: The type of extended attribute
+ * @name: The name of the extended attribute
+ * @buffer: The buffer to write the result into
+ * @size: The size of the buffer
+ *
+ * Returns: actual size of data on success, -errno on error
+ */
+
+int gfs2_xattr_get(struct inode *inode, int type, const char *name,
+ void *buffer, size_t size)
+{
+ 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;
+}
+
+/**
+ * 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_block(ip, &block, &n);
+ if (error)
+ return error;
+ gfs2_trans_add_unrevoke(sdp, block, 1);
+ *bhp = gfs2_meta_new(ip->i_gl, block);
+ gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
+ 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_block(ip, &block, &n);
+ if (error)
+ return error;
+ gfs2_trans_add_unrevoke(sdp, block, 1);
+ bh = gfs2_meta_new(ip->i_gl, block);
+ gfs2_trans_add_bh(ip->i_gl, bh, 1);
+ 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 *al;
+ struct buffer_head *dibh;
+ int error;
+
+ al = gfs2_alloc_get(ip);
+ if (!al)
+ return -ENOMEM;
+
+ error = gfs2_quota_lock_check(ip);
+ if (error)
+ goto out;
+
+ al->al_requested = blks;
+
+ error = gfs2_inplace_reserve(ip);
+ if (error)
+ goto out_gunlock_q;
+
+ error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
+ blks + al->al_rgd->rd_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) {
+ ip->i_inode.i_ctime = CURRENT_TIME;
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+ gfs2_dinode_out(ip, dibh->b_data);
+ brelse(dibh);
+ }
+
+out_end_trans:
+ gfs2_trans_end(GFS2_SB(&ip->i_inode));
+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_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, 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_bh(ip->i_gl, el->el_bh, 1);
+
+ 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;
+ struct buffer_head *dibh;
+ int error;
+
+ error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
+ if (error)
+ return error;
+
+ gfs2_trans_add_bh(ip->i_gl, bh, 1);
+
+ 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;
+ ip->i_inode.i_ctime = CURRENT_TIME;
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+ gfs2_dinode_out(ip, dibh->b_data);
+ brelse(dibh);
+out:
+ 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_bh(ip->i_gl, es->es_bh, 1);
+
+ 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,
+ &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_bh(ip->i_gl, indbh, 1);
+ } else {
+ u64 blk;
+ unsigned int n = 1;
+ error = gfs2_alloc_block(ip, &blk, &n);
+ if (error)
+ return error;
+ gfs2_trans_add_unrevoke(sdp, blk, 1);
+ indbh = gfs2_meta_new(ip->i_gl, blk);
+ gfs2_trans_add_bh(ip->i_gl, indbh, 1);
+ 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;
+ struct buffer_head *dibh;
+ int error;
+
+ error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
+ if (error)
+ return error;
+
+ gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
+
+ 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;
+ }
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (!error) {
+ ip->i_inode.i_ctime = CURRENT_TIME;
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+ gfs2_dinode_out(ip, dibh->b_data);
+ brelse(dibh);
+ }
+
+ gfs2_trans_end(GFS2_SB(&ip->i_inode));
+
+ return error;
+}
+
+/**
+ * gfs2_xattr_remove - Remove a GFS2 extended attribute
+ * @inode: 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 inode *inode, int type, const char *name)
+{
+ struct gfs2_inode *ip = GFS2_I(inode);
+ 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
+ * @type: The type of the extended attribute
+ * @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
+ *
+ * See gfs2_xattr_remove() for details of the removal of xattrs.
+ *
+ * Returns: 0 or errno on failure
+ */
+
+int gfs2_xattr_set(struct inode *inode, int type, const char *name,
+ const void *value, size_t size, int flags)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
+ struct gfs2_inode *ip = GFS2_I(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)
+ return gfs2_xattr_remove(inode, type, name);
+
+ 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 ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
+ struct gfs2_ea_header *ea, char *data)
+{
+ 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;
+
+ bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
+ 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), 0,
+ bh + x);
+ if (error) {
+ while (x--)
+ brelse(bh[x]);
+ goto fail;
+ }
+ dataptrs++;
+ }
+
+ for (x = 0; x < nptrs; x++) {
+ error = gfs2_meta_wait(sdp, bh[x]);
+ 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], 1);
+
+ 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(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
+ if (error)
+ return error;
+
+ gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
+ 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_inode, attr);
+ gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+ gfs2_dinode_out(ip, dibh->b_data);
+ brelse(dibh);
+ }
+
+ gfs2_trans_end(GFS2_SB(&ip->i_inode));
+
+ return error;
+}
+
+static int ea_dealloc_indirect(struct gfs2_inode *ip)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+ struct gfs2_rgrp_list rlist;
+ 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;
+
+ memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
+
+ error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &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(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);
+
+ for (x = 0; x < rlist.rl_rgrps; x++) {
+ struct gfs2_rgrpd *rgd;
+ rgd = rlist.rl_ghs[x].gh_gl->gl_object;
+ 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_bh(ip->i_gl, indbh, 1);
+
+ eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
+ bstart = 0;
+ 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, bstart, blen);
+ bstart = bn;
+ blen = 1;
+ }
+
+ *eablk = 0;
+ gfs2_add_inode_blocks(&ip->i_inode, -1);
+ }
+ if (bstart)
+ gfs2_free_meta(ip, bstart, blen);
+
+ ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (!error) {
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+ 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_alloc *al = ip->i_alloc;
+ struct gfs2_rgrpd *rgd;
+ struct buffer_head *dibh;
+ int error;
+
+ rgd = gfs2_blk2rgrpd(sdp, ip->i_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_eattr, 1);
+
+ ip->i_eattr = 0;
+ gfs2_add_inode_blocks(&ip->i_inode, -1);
+
+ error = gfs2_meta_inode_buffer(ip, &dibh);
+ if (!error) {
+ gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+ gfs2_dinode_out(ip, 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);
+ if (!al)
+ return -ENOMEM;
+
+ error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
+ if (error)
+ goto out_alloc;
+
+ error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &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_diskflags & 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;
+}
+
+static int gfs2_xattr_user_get(struct inode *inode, const char *name,
+ void *buffer, size_t size)
+{
+ return gfs2_xattr_get(inode, GFS2_EATYPE_USR, name, buffer, size);
+}
+
+static int gfs2_xattr_user_set(struct inode *inode, const char *name,
+ const void *value, size_t size, int flags)
+{
+ return gfs2_xattr_set(inode, GFS2_EATYPE_USR, name, value, size, flags);
+}
+
+static int gfs2_xattr_system_get(struct inode *inode, const char *name,
+ void *buffer, size_t size)
+{
+ return gfs2_xattr_get(inode, GFS2_EATYPE_SYS, name, buffer, size);
+}
+
+static int gfs2_xattr_system_set(struct inode *inode, const char *name,
+ const void *value, size_t size, int flags)
+{
+ return gfs2_xattr_set(inode, GFS2_EATYPE_SYS, name, value, size, flags);
+}
+
+static int gfs2_xattr_security_get(struct inode *inode, const char *name,
+ void *buffer, size_t size)
+{
+ return gfs2_xattr_get(inode, GFS2_EATYPE_SECURITY, name, buffer, size);
+}
+
+static int gfs2_xattr_security_set(struct inode *inode, const char *name,
+ const void *value, size_t size, int flags)
+{
+ return gfs2_xattr_set(inode, GFS2_EATYPE_SECURITY, name, value, size, flags);
+}
+
+static struct xattr_handler gfs2_xattr_user_handler = {
+ .prefix = XATTR_USER_PREFIX,
+ .get = gfs2_xattr_user_get,
+ .set = gfs2_xattr_user_set,
+};
+
+static struct xattr_handler gfs2_xattr_security_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .get = gfs2_xattr_security_get,
+ .set = gfs2_xattr_security_set,
+};
+
+static struct xattr_handler gfs2_xattr_system_handler = {
+ .prefix = XATTR_SYSTEM_PREFIX,
+ .get = gfs2_xattr_system_get,
+ .set = gfs2_xattr_system_set,
+};
+
+struct xattr_handler *gfs2_xattr_handlers[] = {
+ &gfs2_xattr_user_handler,
+ &gfs2_xattr_security_handler,
+ &gfs2_xattr_system_handler,
+ NULL,
+};
+
--- /dev/null
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License version 2.
+ */
+
+#ifndef __EATTR_DOT_H__
+#define __EATTR_DOT_H__
+
+struct gfs2_inode;
+struct iattr;
+
+#define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
+#define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
+
+#define GFS2_EA_SIZE(ea) \
+ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
+ ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \
+ (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)
+
+#define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
+#define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
+
+#define GFS2_EAREQ_SIZE_STUFFED(er) \
+ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
+
+#define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
+#define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
+
+#define GFS2_EA2DATAPTRS(ea) \
+((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))
+
+#define GFS2_EA2NEXT(ea) \
+((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
+
+#define GFS2_EA_BH2FIRST(bh) \
+((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
+
+struct gfs2_ea_request {
+ const char *er_name;
+ char *er_data;
+ unsigned int er_name_len;
+ unsigned int er_data_len;
+ unsigned int er_type; /* GFS2_EATYPE_... */
+};
+
+struct gfs2_ea_location {
+ struct buffer_head *el_bh;
+ struct gfs2_ea_header *el_ea;
+ struct gfs2_ea_header *el_prev;
+};
+
+extern int gfs2_xattr_get(struct inode *inode, int type, const char *name,
+ void *buffer, size_t size);
+extern int gfs2_xattr_set(struct inode *inode, int type, const char *name,
+ const void *value, size_t size, int flags);
+extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size);
+extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
+
+/* Exported to acl.c */
+
+extern int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
+ struct gfs2_ea_location *el);
+extern int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
+ char *data, size_t size);
+extern int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
+ struct iattr *attr, char *data);
+
+#endif /* __EATTR_DOT_H__ */
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff