cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

ialloc.c (3684B)

      1/*
      2 * ialloc.c
      3 *
      4 * PURPOSE
      5 *	Inode allocation handling routines for the OSTA-UDF(tm) filesystem.
      6 *
      7 * COPYRIGHT
      8 *	This file is distributed under the terms of the GNU General Public
      9 *	License (GPL). Copies of the GPL can be obtained from:
     10 *		ftp://prep.ai.mit.edu/pub/gnu/GPL
     11 *	Each contributing author retains all rights to their own work.
     12 *
     13 *  (C) 1998-2001 Ben Fennema
     14 *
     15 * HISTORY
     16 *
     17 *  02/24/99 blf  Created.
     18 *
     19 */
     20
     21#include "udfdecl.h"
     22#include <linux/fs.h>
     23#include <linux/sched.h>
     24#include <linux/slab.h>
     25
     26#include "udf_i.h"
     27#include "udf_sb.h"
     28
     29void udf_free_inode(struct inode *inode)
     30{
     31	struct super_block *sb = inode->i_sb;
     32	struct udf_sb_info *sbi = UDF_SB(sb);
     33	struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
     34
     35	if (lvidiu) {
     36		mutex_lock(&sbi->s_alloc_mutex);
     37		if (S_ISDIR(inode->i_mode))
     38			le32_add_cpu(&lvidiu->numDirs, -1);
     39		else
     40			le32_add_cpu(&lvidiu->numFiles, -1);
     41		udf_updated_lvid(sb);
     42		mutex_unlock(&sbi->s_alloc_mutex);
     43	}
     44
     45	udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
     46}
     47
     48struct inode *udf_new_inode(struct inode *dir, umode_t mode)
     49{
     50	struct super_block *sb = dir->i_sb;
     51	struct udf_sb_info *sbi = UDF_SB(sb);
     52	struct inode *inode;
     53	udf_pblk_t block;
     54	uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
     55	struct udf_inode_info *iinfo;
     56	struct udf_inode_info *dinfo = UDF_I(dir);
     57	struct logicalVolIntegrityDescImpUse *lvidiu;
     58	int err;
     59
     60	inode = new_inode(sb);
     61
     62	if (!inode)
     63		return ERR_PTR(-ENOMEM);
     64
     65	iinfo = UDF_I(inode);
     66	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
     67		iinfo->i_efe = 1;
     68		if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
     69			sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
     70		iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
     71					sizeof(struct extendedFileEntry),
     72					GFP_KERNEL);
     73	} else {
     74		iinfo->i_efe = 0;
     75		iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
     76					sizeof(struct fileEntry),
     77					GFP_KERNEL);
     78	}
     79	if (!iinfo->i_data) {
     80		make_bad_inode(inode);
     81		iput(inode);
     82		return ERR_PTR(-ENOMEM);
     83	}
     84
     85	err = -ENOSPC;
     86	block = udf_new_block(dir->i_sb, NULL,
     87			      dinfo->i_location.partitionReferenceNum,
     88			      start, &err);
     89	if (err) {
     90		make_bad_inode(inode);
     91		iput(inode);
     92		return ERR_PTR(err);
     93	}
     94
     95	lvidiu = udf_sb_lvidiu(sb);
     96	if (lvidiu) {
     97		iinfo->i_unique = lvid_get_unique_id(sb);
     98		inode->i_generation = iinfo->i_unique;
     99		mutex_lock(&sbi->s_alloc_mutex);
    100		if (S_ISDIR(mode))
    101			le32_add_cpu(&lvidiu->numDirs, 1);
    102		else
    103			le32_add_cpu(&lvidiu->numFiles, 1);
    104		udf_updated_lvid(sb);
    105		mutex_unlock(&sbi->s_alloc_mutex);
    106	}
    107
    108	inode_init_owner(&init_user_ns, inode, dir, mode);
    109	if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
    110		inode->i_uid = sbi->s_uid;
    111	if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
    112		inode->i_gid = sbi->s_gid;
    113
    114	iinfo->i_location.logicalBlockNum = block;
    115	iinfo->i_location.partitionReferenceNum =
    116				dinfo->i_location.partitionReferenceNum;
    117	inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
    118	inode->i_blocks = 0;
    119	iinfo->i_lenEAttr = 0;
    120	iinfo->i_lenAlloc = 0;
    121	iinfo->i_use = 0;
    122	iinfo->i_checkpoint = 1;
    123	iinfo->i_extraPerms = FE_PERM_U_CHATTR;
    124	udf_update_extra_perms(inode, mode);
    125
    126	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
    127		iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
    128	else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
    129		iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
    130	else
    131		iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
    132	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
    133	iinfo->i_crtime = inode->i_mtime;
    134	if (unlikely(insert_inode_locked(inode) < 0)) {
    135		make_bad_inode(inode);
    136		iput(inode);
    137		return ERR_PTR(-EIO);
    138	}
    139	mark_inode_dirty(inode);
    140
    141	return inode;
    142}