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1327 lines
33 KiB
1327 lines
33 KiB
/*
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* namei.c
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*
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* PURPOSE
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* Inode name handling routines for the OSTA-UDF(tm) filesystem.
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*
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* COPYRIGHT
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* This file is distributed under the terms of the GNU General Public
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* License (GPL). Copies of the GPL can be obtained from:
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* ftp://prep.ai.mit.edu/pub/gnu/GPL
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* Each contributing author retains all rights to their own work.
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*
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* (C) 1998-2004 Ben Fennema
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* (C) 1999-2000 Stelias Computing Inc
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*
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* HISTORY
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*
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* 12/12/98 blf Created. Split out the lookup code from dir.c
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* 04/19/99 blf link, mknod, symlink support
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*/
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#include "udfdecl.h"
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#include "udf_i.h"
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#include "udf_sb.h"
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/quotaops.h>
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#include <linux/smp_lock.h>
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#include <linux/buffer_head.h>
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static inline int udf_match(int len1, const char *name1, int len2, const char *name2)
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{
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if (len1 != len2)
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return 0;
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return !memcmp(name1, name2, len1);
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}
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int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
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struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
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uint8_t *impuse, uint8_t *fileident)
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{
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uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
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uint16_t crc;
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uint8_t checksum = 0;
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int i;
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int offset;
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uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
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uint8_t lfi = cfi->lengthFileIdent;
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int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
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sizeof(struct fileIdentDesc);
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int adinicb = 0;
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if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
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adinicb = 1;
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offset = fibh->soffset + sizeof(struct fileIdentDesc);
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if (impuse)
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{
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if (adinicb || (offset + liu < 0))
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memcpy((uint8_t *)sfi->impUse, impuse, liu);
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else if (offset >= 0)
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memcpy(fibh->ebh->b_data + offset, impuse, liu);
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else
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{
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memcpy((uint8_t *)sfi->impUse, impuse, -offset);
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memcpy(fibh->ebh->b_data, impuse - offset, liu + offset);
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}
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}
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offset += liu;
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if (fileident)
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{
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if (adinicb || (offset + lfi < 0))
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memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
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else if (offset >= 0)
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memcpy(fibh->ebh->b_data + offset, fileident, lfi);
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else
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{
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memcpy((uint8_t *)sfi->fileIdent + liu, fileident, -offset);
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memcpy(fibh->ebh->b_data, fileident - offset, lfi + offset);
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}
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}
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offset += lfi;
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if (adinicb || (offset + padlen < 0))
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memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
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else if (offset >= 0)
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memset(fibh->ebh->b_data + offset, 0x00, padlen);
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else
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{
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memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
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memset(fibh->ebh->b_data, 0x00, padlen + offset);
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}
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crc = udf_crc((uint8_t *)cfi + sizeof(tag), sizeof(struct fileIdentDesc) -
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sizeof(tag), 0);
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if (fibh->sbh == fibh->ebh)
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crc = udf_crc((uint8_t *)sfi->impUse,
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crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc);
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else if (sizeof(struct fileIdentDesc) >= -fibh->soffset)
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crc = udf_crc(fibh->ebh->b_data + sizeof(struct fileIdentDesc) + fibh->soffset,
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crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc);
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else
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{
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crc = udf_crc((uint8_t *)sfi->impUse,
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-fibh->soffset - sizeof(struct fileIdentDesc), crc);
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crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc);
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}
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cfi->descTag.descCRC = cpu_to_le16(crc);
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cfi->descTag.descCRCLength = cpu_to_le16(crclen);
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for (i=0; i<16; i++)
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if (i != 4)
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checksum += ((uint8_t *)&cfi->descTag)[i];
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cfi->descTag.tagChecksum = checksum;
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if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset))
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memcpy((uint8_t *)sfi, (uint8_t *)cfi, sizeof(struct fileIdentDesc));
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else
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{
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memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
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memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
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sizeof(struct fileIdentDesc) + fibh->soffset);
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}
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if (adinicb)
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mark_inode_dirty(inode);
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else
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{
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if (fibh->sbh != fibh->ebh)
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mark_buffer_dirty_inode(fibh->ebh, inode);
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mark_buffer_dirty_inode(fibh->sbh, inode);
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}
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return 0;
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}
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static struct fileIdentDesc *
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udf_find_entry(struct inode *dir, struct dentry *dentry,
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struct udf_fileident_bh *fibh,
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struct fileIdentDesc *cfi)
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{
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struct fileIdentDesc *fi=NULL;
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loff_t f_pos;
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int block, flen;
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char fname[UDF_NAME_LEN];
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char *nameptr;
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uint8_t lfi;
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uint16_t liu;
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loff_t size;
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kernel_lb_addr bloc, eloc;
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uint32_t extoffset, elen, offset;
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struct buffer_head *bh = NULL;
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size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
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f_pos = (udf_ext0_offset(dir) >> 2);
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fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
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if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
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fibh->sbh = fibh->ebh = NULL;
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else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
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&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
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{
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offset >>= dir->i_sb->s_blocksize_bits;
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block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
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if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
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{
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if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
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extoffset -= sizeof(short_ad);
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else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
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extoffset -= sizeof(long_ad);
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}
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else
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offset = 0;
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if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
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{
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udf_release_data(bh);
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return NULL;
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}
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}
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else
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{
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udf_release_data(bh);
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return NULL;
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}
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while ( (f_pos < size) )
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{
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fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
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if (!fi)
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{
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if (fibh->sbh != fibh->ebh)
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udf_release_data(fibh->ebh);
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udf_release_data(fibh->sbh);
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udf_release_data(bh);
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return NULL;
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}
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liu = le16_to_cpu(cfi->lengthOfImpUse);
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lfi = cfi->lengthFileIdent;
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if (fibh->sbh == fibh->ebh)
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{
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nameptr = fi->fileIdent + liu;
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}
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else
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{
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int poffset; /* Unpaded ending offset */
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poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi;
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if (poffset >= lfi)
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nameptr = (uint8_t *)(fibh->ebh->b_data + poffset - lfi);
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else
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{
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nameptr = fname;
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memcpy(nameptr, fi->fileIdent + liu, lfi - poffset);
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memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset);
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}
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}
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if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 )
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{
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if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE) )
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continue;
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}
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if ( (cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0 )
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{
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if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE) )
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continue;
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}
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if (!lfi)
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continue;
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if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)))
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{
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if (udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
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{
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udf_release_data(bh);
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return fi;
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}
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}
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}
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if (fibh->sbh != fibh->ebh)
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udf_release_data(fibh->ebh);
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udf_release_data(fibh->sbh);
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udf_release_data(bh);
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return NULL;
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}
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/*
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* udf_lookup
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*
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* PURPOSE
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* Look-up the inode for a given name.
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*
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* DESCRIPTION
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* Required - lookup_dentry() will return -ENOTDIR if this routine is not
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* available for a directory. The filesystem is useless if this routine is
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* not available for at least the filesystem's root directory.
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*
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* This routine is passed an incomplete dentry - it must be completed by
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* calling d_add(dentry, inode). If the name does not exist, then the
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* specified inode must be set to null. An error should only be returned
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* when the lookup fails for a reason other than the name not existing.
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* Note that the directory inode semaphore is held during the call.
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*
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* Refer to lookup_dentry() in fs/namei.c
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* lookup_dentry() -> lookup() -> real_lookup() -> .
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*
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* PRE-CONDITIONS
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* dir Pointer to inode of parent directory.
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* dentry Pointer to dentry to complete.
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* nd Pointer to lookup nameidata
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*
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* POST-CONDITIONS
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* <return> Zero on success.
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*
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* HISTORY
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* July 1, 1997 - Andrew E. Mileski
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* Written, tested, and released.
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*/
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static struct dentry *
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udf_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
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{
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struct inode *inode = NULL;
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struct fileIdentDesc cfi;
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struct udf_fileident_bh fibh;
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if (dentry->d_name.len > UDF_NAME_LEN-2)
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return ERR_PTR(-ENAMETOOLONG);
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|
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lock_kernel();
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#ifdef UDF_RECOVERY
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/* temporary shorthand for specifying files by inode number */
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if (!strncmp(dentry->d_name.name, ".B=", 3) )
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{
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kernel_lb_addr lb = { 0, simple_strtoul(dentry->d_name.name+3, NULL, 0) };
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inode = udf_iget(dir->i_sb, lb);
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if (!inode)
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{
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unlock_kernel();
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return ERR_PTR(-EACCES);
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}
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}
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else
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#endif /* UDF_RECOVERY */
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if (udf_find_entry(dir, dentry, &fibh, &cfi))
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{
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if (fibh.sbh != fibh.ebh)
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udf_release_data(fibh.ebh);
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udf_release_data(fibh.sbh);
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inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
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if ( !inode )
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{
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unlock_kernel();
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return ERR_PTR(-EACCES);
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}
|
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}
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unlock_kernel();
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d_add(dentry, inode);
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return NULL;
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}
|
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|
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static struct fileIdentDesc *
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udf_add_entry(struct inode *dir, struct dentry *dentry,
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struct udf_fileident_bh *fibh,
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struct fileIdentDesc *cfi, int *err)
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{
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struct super_block *sb;
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struct fileIdentDesc *fi=NULL;
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char name[UDF_NAME_LEN], fname[UDF_NAME_LEN];
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int namelen;
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loff_t f_pos;
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int flen;
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char *nameptr;
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loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
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int nfidlen;
|
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uint8_t lfi;
|
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uint16_t liu;
|
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int block;
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kernel_lb_addr bloc, eloc;
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uint32_t extoffset, elen, offset;
|
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struct buffer_head *bh = NULL;
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sb = dir->i_sb;
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|
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if (dentry)
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{
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if (!dentry->d_name.len)
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{
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*err = -EINVAL;
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return NULL;
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}
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|
|
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if ( !(namelen = udf_put_filename(sb, dentry->d_name.name, name, dentry->d_name.len)))
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{
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*err = -ENAMETOOLONG;
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return NULL;
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}
|
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}
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else
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namelen = 0;
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nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
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|
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f_pos = (udf_ext0_offset(dir) >> 2);
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|
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fibh->soffset = fibh->eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
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if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
|
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fibh->sbh = fibh->ebh = NULL;
|
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else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
|
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&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
|
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{
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offset >>= dir->i_sb->s_blocksize_bits;
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block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
|
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if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
|
|
{
|
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if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
|
|
extoffset -= sizeof(short_ad);
|
|
else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
|
|
extoffset -= sizeof(long_ad);
|
|
}
|
|
else
|
|
offset = 0;
|
|
|
|
if (!(fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block)))
|
|
{
|
|
udf_release_data(bh);
|
|
*err = -EIO;
|
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return NULL;
|
|
}
|
|
|
|
block = UDF_I_LOCATION(dir).logicalBlockNum;
|
|
|
|
}
|
|
else
|
|
{
|
|
block = udf_get_lb_pblock(dir->i_sb, UDF_I_LOCATION(dir), 0);
|
|
fibh->sbh = fibh->ebh = NULL;
|
|
fibh->soffset = fibh->eoffset = sb->s_blocksize;
|
|
goto add;
|
|
}
|
|
|
|
while ( (f_pos < size) )
|
|
{
|
|
fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
|
|
|
|
if (!fi)
|
|
{
|
|
if (fibh->sbh != fibh->ebh)
|
|
udf_release_data(fibh->ebh);
|
|
udf_release_data(fibh->sbh);
|
|
udf_release_data(bh);
|
|
*err = -EIO;
|
|
return NULL;
|
|
}
|
|
|
|
liu = le16_to_cpu(cfi->lengthOfImpUse);
|
|
lfi = cfi->lengthFileIdent;
|
|
|
|
if (fibh->sbh == fibh->ebh)
|
|
nameptr = fi->fileIdent + liu;
|
|
else
|
|
{
|
|
int poffset; /* Unpaded ending offset */
|
|
|
|
poffset = fibh->soffset + sizeof(struct fileIdentDesc) + liu + lfi;
|
|
|
|
if (poffset >= lfi)
|
|
nameptr = (char *)(fibh->ebh->b_data + poffset - lfi);
|
|
else
|
|
{
|
|
nameptr = fname;
|
|
memcpy(nameptr, fi->fileIdent + liu, lfi - poffset);
|
|
memcpy(nameptr + lfi - poffset, fibh->ebh->b_data, poffset);
|
|
}
|
|
}
|
|
|
|
if ( (cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0 )
|
|
{
|
|
if (((sizeof(struct fileIdentDesc) + liu + lfi + 3) & ~3) == nfidlen)
|
|
{
|
|
udf_release_data(bh);
|
|
cfi->descTag.tagSerialNum = cpu_to_le16(1);
|
|
cfi->fileVersionNum = cpu_to_le16(1);
|
|
cfi->fileCharacteristics = 0;
|
|
cfi->lengthFileIdent = namelen;
|
|
cfi->lengthOfImpUse = cpu_to_le16(0);
|
|
if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name))
|
|
return fi;
|
|
else
|
|
{
|
|
*err = -EIO;
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!lfi || !dentry)
|
|
continue;
|
|
|
|
if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)) &&
|
|
udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
|
|
{
|
|
if (fibh->sbh != fibh->ebh)
|
|
udf_release_data(fibh->ebh);
|
|
udf_release_data(fibh->sbh);
|
|
udf_release_data(bh);
|
|
*err = -EEXIST;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
add:
|
|
f_pos += nfidlen;
|
|
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB &&
|
|
sb->s_blocksize - fibh->eoffset < nfidlen)
|
|
{
|
|
udf_release_data(bh);
|
|
bh = NULL;
|
|
fibh->soffset -= udf_ext0_offset(dir);
|
|
fibh->eoffset -= udf_ext0_offset(dir);
|
|
f_pos -= (udf_ext0_offset(dir) >> 2);
|
|
if (fibh->sbh != fibh->ebh)
|
|
udf_release_data(fibh->ebh);
|
|
udf_release_data(fibh->sbh);
|
|
if (!(fibh->sbh = fibh->ebh = udf_expand_dir_adinicb(dir, &block, err)))
|
|
return NULL;
|
|
bloc = UDF_I_LOCATION(dir);
|
|
eloc.logicalBlockNum = block;
|
|
eloc.partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum;
|
|
elen = dir->i_sb->s_blocksize;
|
|
extoffset = udf_file_entry_alloc_offset(dir);
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
|
|
extoffset += sizeof(short_ad);
|
|
else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
|
|
extoffset += sizeof(long_ad);
|
|
}
|
|
|
|
if (sb->s_blocksize - fibh->eoffset >= nfidlen)
|
|
{
|
|
fibh->soffset = fibh->eoffset;
|
|
fibh->eoffset += nfidlen;
|
|
if (fibh->sbh != fibh->ebh)
|
|
{
|
|
udf_release_data(fibh->sbh);
|
|
fibh->sbh = fibh->ebh;
|
|
}
|
|
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
|
|
{
|
|
block = UDF_I_LOCATION(dir).logicalBlockNum;
|
|
fi = (struct fileIdentDesc *)(UDF_I_DATA(dir) + fibh->soffset - udf_ext0_offset(dir) + UDF_I_LENEATTR(dir));
|
|
}
|
|
else
|
|
{
|
|
block = eloc.logicalBlockNum + ((elen - 1) >>
|
|
dir->i_sb->s_blocksize_bits);
|
|
fi = (struct fileIdentDesc *)(fibh->sbh->b_data + fibh->soffset);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fibh->soffset = fibh->eoffset - sb->s_blocksize;
|
|
fibh->eoffset += nfidlen - sb->s_blocksize;
|
|
if (fibh->sbh != fibh->ebh)
|
|
{
|
|
udf_release_data(fibh->sbh);
|
|
fibh->sbh = fibh->ebh;
|
|
}
|
|
|
|
block = eloc.logicalBlockNum + ((elen - 1) >>
|
|
dir->i_sb->s_blocksize_bits);
|
|
|
|
if (!(fibh->ebh = udf_bread(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2), 1, err)))
|
|
{
|
|
udf_release_data(bh);
|
|
udf_release_data(fibh->sbh);
|
|
return NULL;
|
|
}
|
|
|
|
if (!(fibh->soffset))
|
|
{
|
|
if (udf_next_aext(dir, &bloc, &extoffset, &eloc, &elen, &bh, 1) ==
|
|
(EXT_RECORDED_ALLOCATED >> 30))
|
|
{
|
|
block = eloc.logicalBlockNum + ((elen - 1) >>
|
|
dir->i_sb->s_blocksize_bits);
|
|
}
|
|
else
|
|
block ++;
|
|
|
|
udf_release_data(fibh->sbh);
|
|
fibh->sbh = fibh->ebh;
|
|
fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
|
|
}
|
|
else
|
|
{
|
|
fi = (struct fileIdentDesc *)
|
|
(fibh->sbh->b_data + sb->s_blocksize + fibh->soffset);
|
|
}
|
|
}
|
|
|
|
memset(cfi, 0, sizeof(struct fileIdentDesc));
|
|
if (UDF_SB_UDFREV(sb) >= 0x0200)
|
|
udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block, sizeof(tag));
|
|
else
|
|
udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block, sizeof(tag));
|
|
cfi->fileVersionNum = cpu_to_le16(1);
|
|
cfi->lengthFileIdent = namelen;
|
|
cfi->lengthOfImpUse = cpu_to_le16(0);
|
|
if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name))
|
|
{
|
|
udf_release_data(bh);
|
|
dir->i_size += nfidlen;
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
|
|
UDF_I_LENALLOC(dir) += nfidlen;
|
|
mark_inode_dirty(dir);
|
|
return fi;
|
|
}
|
|
else
|
|
{
|
|
udf_release_data(bh);
|
|
if (fibh->sbh != fibh->ebh)
|
|
udf_release_data(fibh->ebh);
|
|
udf_release_data(fibh->sbh);
|
|
*err = -EIO;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
|
|
struct udf_fileident_bh *fibh, struct fileIdentDesc *cfi)
|
|
{
|
|
cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
|
|
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
|
|
memset(&(cfi->icb), 0x00, sizeof(long_ad));
|
|
return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
|
|
}
|
|
|
|
static int udf_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
|
|
{
|
|
struct udf_fileident_bh fibh;
|
|
struct inode *inode;
|
|
struct fileIdentDesc cfi, *fi;
|
|
int err;
|
|
|
|
lock_kernel();
|
|
inode = udf_new_inode(dir, mode, &err);
|
|
if (!inode)
|
|
{
|
|
unlock_kernel();
|
|
return err;
|
|
}
|
|
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
|
|
inode->i_data.a_ops = &udf_adinicb_aops;
|
|
else
|
|
inode->i_data.a_ops = &udf_aops;
|
|
inode->i_op = &udf_file_inode_operations;
|
|
inode->i_fop = &udf_file_operations;
|
|
inode->i_mode = mode;
|
|
mark_inode_dirty(inode);
|
|
|
|
if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
|
|
{
|
|
inode->i_nlink --;
|
|
mark_inode_dirty(inode);
|
|
iput(inode);
|
|
unlock_kernel();
|
|
return err;
|
|
}
|
|
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
|
|
cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
|
|
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
|
|
cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
|
|
udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
|
|
{
|
|
mark_inode_dirty(dir);
|
|
}
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
unlock_kernel();
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
}
|
|
|
|
static int udf_mknod(struct inode * dir, struct dentry * dentry, int mode, dev_t rdev)
|
|
{
|
|
struct inode * inode;
|
|
struct udf_fileident_bh fibh;
|
|
struct fileIdentDesc cfi, *fi;
|
|
int err;
|
|
|
|
if (!old_valid_dev(rdev))
|
|
return -EINVAL;
|
|
|
|
lock_kernel();
|
|
err = -EIO;
|
|
inode = udf_new_inode(dir, mode, &err);
|
|
if (!inode)
|
|
goto out;
|
|
|
|
inode->i_uid = current->fsuid;
|
|
init_special_inode(inode, mode, rdev);
|
|
if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
|
|
{
|
|
inode->i_nlink --;
|
|
mark_inode_dirty(inode);
|
|
iput(inode);
|
|
unlock_kernel();
|
|
return err;
|
|
}
|
|
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
|
|
cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
|
|
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
|
|
cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
|
|
udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
|
|
{
|
|
mark_inode_dirty(dir);
|
|
}
|
|
mark_inode_dirty(inode);
|
|
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
d_instantiate(dentry, inode);
|
|
err = 0;
|
|
out:
|
|
unlock_kernel();
|
|
return err;
|
|
}
|
|
|
|
static int udf_mkdir(struct inode * dir, struct dentry * dentry, int mode)
|
|
{
|
|
struct inode * inode;
|
|
struct udf_fileident_bh fibh;
|
|
struct fileIdentDesc cfi, *fi;
|
|
int err;
|
|
|
|
lock_kernel();
|
|
err = -EMLINK;
|
|
if (dir->i_nlink >= (256<<sizeof(dir->i_nlink))-1)
|
|
goto out;
|
|
|
|
err = -EIO;
|
|
inode = udf_new_inode(dir, S_IFDIR, &err);
|
|
if (!inode)
|
|
goto out;
|
|
|
|
inode->i_op = &udf_dir_inode_operations;
|
|
inode->i_fop = &udf_dir_operations;
|
|
if (!(fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err)))
|
|
{
|
|
inode->i_nlink--;
|
|
mark_inode_dirty(inode);
|
|
iput(inode);
|
|
goto out;
|
|
}
|
|
inode->i_nlink = 2;
|
|
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
|
|
cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(dir));
|
|
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
|
|
cpu_to_le32(UDF_I_UNIQUE(dir) & 0x00000000FFFFFFFFUL);
|
|
cfi.fileCharacteristics = FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
|
|
udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
|
|
udf_release_data(fibh.sbh);
|
|
inode->i_mode = S_IFDIR | mode;
|
|
if (dir->i_mode & S_ISGID)
|
|
inode->i_mode |= S_ISGID;
|
|
mark_inode_dirty(inode);
|
|
|
|
if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
|
|
{
|
|
inode->i_nlink = 0;
|
|
mark_inode_dirty(inode);
|
|
iput(inode);
|
|
goto out;
|
|
}
|
|
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
|
|
cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
|
|
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
|
|
cpu_to_le32(UDF_I_UNIQUE(inode) & 0x00000000FFFFFFFFUL);
|
|
cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
|
|
udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
|
|
dir->i_nlink++;
|
|
mark_inode_dirty(dir);
|
|
d_instantiate(dentry, inode);
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
err = 0;
|
|
out:
|
|
unlock_kernel();
|
|
return err;
|
|
}
|
|
|
|
static int empty_dir(struct inode *dir)
|
|
{
|
|
struct fileIdentDesc *fi, cfi;
|
|
struct udf_fileident_bh fibh;
|
|
loff_t f_pos;
|
|
loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
|
|
int block;
|
|
kernel_lb_addr bloc, eloc;
|
|
uint32_t extoffset, elen, offset;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
f_pos = (udf_ext0_offset(dir) >> 2);
|
|
|
|
fibh.soffset = fibh.eoffset = (f_pos & ((dir->i_sb->s_blocksize - 1) >> 2)) << 2;
|
|
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
|
|
fibh.sbh = fibh.ebh = NULL;
|
|
else if (inode_bmap(dir, f_pos >> (dir->i_sb->s_blocksize_bits - 2),
|
|
&bloc, &extoffset, &eloc, &elen, &offset, &bh) == (EXT_RECORDED_ALLOCATED >> 30))
|
|
{
|
|
offset >>= dir->i_sb->s_blocksize_bits;
|
|
block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
|
|
if ((++offset << dir->i_sb->s_blocksize_bits) < elen)
|
|
{
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_SHORT)
|
|
extoffset -= sizeof(short_ad);
|
|
else if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_LONG)
|
|
extoffset -= sizeof(long_ad);
|
|
}
|
|
else
|
|
offset = 0;
|
|
|
|
if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block)))
|
|
{
|
|
udf_release_data(bh);
|
|
return 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
udf_release_data(bh);
|
|
return 0;
|
|
}
|
|
|
|
|
|
while ( (f_pos < size) )
|
|
{
|
|
fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &bloc, &extoffset, &eloc, &elen, &offset, &bh);
|
|
|
|
if (!fi)
|
|
{
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
udf_release_data(bh);
|
|
return 0;
|
|
}
|
|
|
|
if (cfi.lengthFileIdent && (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0)
|
|
{
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
udf_release_data(bh);
|
|
return 0;
|
|
}
|
|
}
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
udf_release_data(bh);
|
|
return 1;
|
|
}
|
|
|
|
static int udf_rmdir(struct inode * dir, struct dentry * dentry)
|
|
{
|
|
int retval;
|
|
struct inode * inode = dentry->d_inode;
|
|
struct udf_fileident_bh fibh;
|
|
struct fileIdentDesc *fi, cfi;
|
|
kernel_lb_addr tloc;
|
|
|
|
retval = -ENOENT;
|
|
lock_kernel();
|
|
fi = udf_find_entry(dir, dentry, &fibh, &cfi);
|
|
if (!fi)
|
|
goto out;
|
|
|
|
retval = -EIO;
|
|
tloc = lelb_to_cpu(cfi.icb.extLocation);
|
|
if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
|
|
goto end_rmdir;
|
|
retval = -ENOTEMPTY;
|
|
if (!empty_dir(inode))
|
|
goto end_rmdir;
|
|
retval = udf_delete_entry(dir, fi, &fibh, &cfi);
|
|
if (retval)
|
|
goto end_rmdir;
|
|
if (inode->i_nlink != 2)
|
|
udf_warning(inode->i_sb, "udf_rmdir",
|
|
"empty directory has nlink != 2 (%d)",
|
|
inode->i_nlink);
|
|
inode->i_nlink = 0;
|
|
inode->i_size = 0;
|
|
mark_inode_dirty(inode);
|
|
dir->i_nlink --;
|
|
inode->i_ctime = dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
|
|
mark_inode_dirty(dir);
|
|
|
|
end_rmdir:
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
out:
|
|
unlock_kernel();
|
|
return retval;
|
|
}
|
|
|
|
static int udf_unlink(struct inode * dir, struct dentry * dentry)
|
|
{
|
|
int retval;
|
|
struct inode * inode = dentry->d_inode;
|
|
struct udf_fileident_bh fibh;
|
|
struct fileIdentDesc *fi;
|
|
struct fileIdentDesc cfi;
|
|
kernel_lb_addr tloc;
|
|
|
|
retval = -ENOENT;
|
|
lock_kernel();
|
|
fi = udf_find_entry(dir, dentry, &fibh, &cfi);
|
|
if (!fi)
|
|
goto out;
|
|
|
|
retval = -EIO;
|
|
tloc = lelb_to_cpu(cfi.icb.extLocation);
|
|
if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
|
|
goto end_unlink;
|
|
|
|
if (!inode->i_nlink)
|
|
{
|
|
udf_debug("Deleting nonexistent file (%lu), %d\n",
|
|
inode->i_ino, inode->i_nlink);
|
|
inode->i_nlink = 1;
|
|
}
|
|
retval = udf_delete_entry(dir, fi, &fibh, &cfi);
|
|
if (retval)
|
|
goto end_unlink;
|
|
dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
|
|
mark_inode_dirty(dir);
|
|
inode->i_nlink--;
|
|
mark_inode_dirty(inode);
|
|
inode->i_ctime = dir->i_ctime;
|
|
retval = 0;
|
|
|
|
end_unlink:
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
out:
|
|
unlock_kernel();
|
|
return retval;
|
|
}
|
|
|
|
static int udf_symlink(struct inode * dir, struct dentry * dentry, const char * symname)
|
|
{
|
|
struct inode * inode;
|
|
struct pathComponent *pc;
|
|
char *compstart;
|
|
struct udf_fileident_bh fibh;
|
|
struct buffer_head *bh = NULL;
|
|
int eoffset, elen = 0;
|
|
struct fileIdentDesc *fi;
|
|
struct fileIdentDesc cfi;
|
|
char *ea;
|
|
int err;
|
|
int block;
|
|
char name[UDF_NAME_LEN];
|
|
int namelen;
|
|
|
|
lock_kernel();
|
|
if (!(inode = udf_new_inode(dir, S_IFLNK, &err)))
|
|
goto out;
|
|
|
|
inode->i_mode = S_IFLNK | S_IRWXUGO;
|
|
inode->i_data.a_ops = &udf_symlink_aops;
|
|
inode->i_op = &page_symlink_inode_operations;
|
|
|
|
if (UDF_I_ALLOCTYPE(inode) != ICBTAG_FLAG_AD_IN_ICB)
|
|
{
|
|
struct buffer_head *bh = NULL;
|
|
kernel_lb_addr bloc, eloc;
|
|
uint32_t elen, extoffset;
|
|
|
|
block = udf_new_block(inode->i_sb, inode,
|
|
UDF_I_LOCATION(inode).partitionReferenceNum,
|
|
UDF_I_LOCATION(inode).logicalBlockNum, &err);
|
|
if (!block)
|
|
goto out_no_entry;
|
|
bloc = UDF_I_LOCATION(inode);
|
|
eloc.logicalBlockNum = block;
|
|
eloc.partitionReferenceNum = UDF_I_LOCATION(inode).partitionReferenceNum;
|
|
elen = inode->i_sb->s_blocksize;
|
|
UDF_I_LENEXTENTS(inode) = elen;
|
|
extoffset = udf_file_entry_alloc_offset(inode);
|
|
udf_add_aext(inode, &bloc, &extoffset, eloc, elen, &bh, 0);
|
|
udf_release_data(bh);
|
|
|
|
block = udf_get_pblock(inode->i_sb, block,
|
|
UDF_I_LOCATION(inode).partitionReferenceNum, 0);
|
|
bh = udf_tread(inode->i_sb, block);
|
|
lock_buffer(bh);
|
|
memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
|
|
set_buffer_uptodate(bh);
|
|
unlock_buffer(bh);
|
|
mark_buffer_dirty_inode(bh, inode);
|
|
ea = bh->b_data + udf_ext0_offset(inode);
|
|
}
|
|
else
|
|
ea = UDF_I_DATA(inode) + UDF_I_LENEATTR(inode);
|
|
|
|
eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
|
|
pc = (struct pathComponent *)ea;
|
|
|
|
if (*symname == '/')
|
|
{
|
|
do
|
|
{
|
|
symname++;
|
|
} while (*symname == '/');
|
|
|
|
pc->componentType = 1;
|
|
pc->lengthComponentIdent = 0;
|
|
pc->componentFileVersionNum = 0;
|
|
pc += sizeof(struct pathComponent);
|
|
elen += sizeof(struct pathComponent);
|
|
}
|
|
|
|
err = -ENAMETOOLONG;
|
|
|
|
while (*symname)
|
|
{
|
|
if (elen + sizeof(struct pathComponent) > eoffset)
|
|
goto out_no_entry;
|
|
|
|
pc = (struct pathComponent *)(ea + elen);
|
|
|
|
compstart = (char *)symname;
|
|
|
|
do
|
|
{
|
|
symname++;
|
|
} while (*symname && *symname != '/');
|
|
|
|
pc->componentType = 5;
|
|
pc->lengthComponentIdent = 0;
|
|
pc->componentFileVersionNum = 0;
|
|
if (compstart[0] == '.')
|
|
{
|
|
if ((symname-compstart) == 1)
|
|
pc->componentType = 4;
|
|
else if ((symname-compstart) == 2 && compstart[1] == '.')
|
|
pc->componentType = 3;
|
|
}
|
|
|
|
if (pc->componentType == 5)
|
|
{
|
|
if ( !(namelen = udf_put_filename(inode->i_sb, compstart, name, symname-compstart)))
|
|
goto out_no_entry;
|
|
|
|
if (elen + sizeof(struct pathComponent) + namelen > eoffset)
|
|
goto out_no_entry;
|
|
else
|
|
pc->lengthComponentIdent = namelen;
|
|
|
|
memcpy(pc->componentIdent, name, namelen);
|
|
}
|
|
|
|
elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
|
|
|
|
if (*symname)
|
|
{
|
|
do
|
|
{
|
|
symname++;
|
|
} while (*symname == '/');
|
|
}
|
|
}
|
|
|
|
udf_release_data(bh);
|
|
inode->i_size = elen;
|
|
if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
|
|
UDF_I_LENALLOC(inode) = inode->i_size;
|
|
mark_inode_dirty(inode);
|
|
|
|
if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
|
|
goto out_no_entry;
|
|
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
|
|
cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
|
|
if (UDF_SB_LVIDBH(inode->i_sb))
|
|
{
|
|
struct logicalVolHeaderDesc *lvhd;
|
|
uint64_t uniqueID;
|
|
lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse);
|
|
uniqueID = le64_to_cpu(lvhd->uniqueID);
|
|
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
|
|
cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
|
|
if (!(++uniqueID & 0x00000000FFFFFFFFUL))
|
|
uniqueID += 16;
|
|
lvhd->uniqueID = cpu_to_le64(uniqueID);
|
|
mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb));
|
|
}
|
|
udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
|
|
{
|
|
mark_inode_dirty(dir);
|
|
}
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
d_instantiate(dentry, inode);
|
|
err = 0;
|
|
|
|
out:
|
|
unlock_kernel();
|
|
return err;
|
|
|
|
out_no_entry:
|
|
inode->i_nlink--;
|
|
mark_inode_dirty(inode);
|
|
iput(inode);
|
|
goto out;
|
|
}
|
|
|
|
static int udf_link(struct dentry * old_dentry, struct inode * dir,
|
|
struct dentry *dentry)
|
|
{
|
|
struct inode *inode = old_dentry->d_inode;
|
|
struct udf_fileident_bh fibh;
|
|
struct fileIdentDesc cfi, *fi;
|
|
int err;
|
|
|
|
lock_kernel();
|
|
if (inode->i_nlink >= (256<<sizeof(inode->i_nlink))-1)
|
|
{
|
|
unlock_kernel();
|
|
return -EMLINK;
|
|
}
|
|
|
|
if (!(fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err)))
|
|
{
|
|
unlock_kernel();
|
|
return err;
|
|
}
|
|
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
|
|
cfi.icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(inode));
|
|
if (UDF_SB_LVIDBH(inode->i_sb))
|
|
{
|
|
struct logicalVolHeaderDesc *lvhd;
|
|
uint64_t uniqueID;
|
|
lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(inode->i_sb)->logicalVolContentsUse);
|
|
uniqueID = le64_to_cpu(lvhd->uniqueID);
|
|
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
|
|
cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
|
|
if (!(++uniqueID & 0x00000000FFFFFFFFUL))
|
|
uniqueID += 16;
|
|
lvhd->uniqueID = cpu_to_le64(uniqueID);
|
|
mark_buffer_dirty(UDF_SB_LVIDBH(inode->i_sb));
|
|
}
|
|
udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
|
|
if (UDF_I_ALLOCTYPE(dir) == ICBTAG_FLAG_AD_IN_ICB)
|
|
{
|
|
mark_inode_dirty(dir);
|
|
}
|
|
if (fibh.sbh != fibh.ebh)
|
|
udf_release_data(fibh.ebh);
|
|
udf_release_data(fibh.sbh);
|
|
inode->i_nlink ++;
|
|
inode->i_ctime = current_fs_time(inode->i_sb);
|
|
mark_inode_dirty(inode);
|
|
atomic_inc(&inode->i_count);
|
|
d_instantiate(dentry, inode);
|
|
unlock_kernel();
|
|
return 0;
|
|
}
|
|
|
|
/* Anybody can rename anything with this: the permission checks are left to the
|
|
* higher-level routines.
|
|
*/
|
|
static int udf_rename (struct inode * old_dir, struct dentry * old_dentry,
|
|
struct inode * new_dir, struct dentry * new_dentry)
|
|
{
|
|
struct inode * old_inode = old_dentry->d_inode;
|
|
struct inode * new_inode = new_dentry->d_inode;
|
|
struct udf_fileident_bh ofibh, nfibh;
|
|
struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL, ocfi, ncfi;
|
|
struct buffer_head *dir_bh = NULL;
|
|
int retval = -ENOENT;
|
|
kernel_lb_addr tloc;
|
|
|
|
lock_kernel();
|
|
if ((ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi)))
|
|
{
|
|
if (ofibh.sbh != ofibh.ebh)
|
|
udf_release_data(ofibh.ebh);
|
|
udf_release_data(ofibh.sbh);
|
|
}
|
|
tloc = lelb_to_cpu(ocfi.icb.extLocation);
|
|
if (!ofi || udf_get_lb_pblock(old_dir->i_sb, tloc, 0)
|
|
!= old_inode->i_ino)
|
|
goto end_rename;
|
|
|
|
nfi = udf_find_entry(new_dir, new_dentry, &nfibh, &ncfi);
|
|
if (nfi)
|
|
{
|
|
if (!new_inode)
|
|
{
|
|
if (nfibh.sbh != nfibh.ebh)
|
|
udf_release_data(nfibh.ebh);
|
|
udf_release_data(nfibh.sbh);
|
|
nfi = NULL;
|
|
}
|
|
}
|
|
if (S_ISDIR(old_inode->i_mode))
|
|
{
|
|
uint32_t offset = udf_ext0_offset(old_inode);
|
|
|
|
if (new_inode)
|
|
{
|
|
retval = -ENOTEMPTY;
|
|
if (!empty_dir(new_inode))
|
|
goto end_rename;
|
|
}
|
|
retval = -EIO;
|
|
if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB)
|
|
{
|
|
dir_fi = udf_get_fileident(UDF_I_DATA(old_inode) -
|
|
(UDF_I_EFE(old_inode) ?
|
|
sizeof(struct extendedFileEntry) :
|
|
sizeof(struct fileEntry)),
|
|
old_inode->i_sb->s_blocksize, &offset);
|
|
}
|
|
else
|
|
{
|
|
dir_bh = udf_bread(old_inode, 0, 0, &retval);
|
|
if (!dir_bh)
|
|
goto end_rename;
|
|
dir_fi = udf_get_fileident(dir_bh->b_data, old_inode->i_sb->s_blocksize, &offset);
|
|
}
|
|
if (!dir_fi)
|
|
goto end_rename;
|
|
tloc = lelb_to_cpu(dir_fi->icb.extLocation);
|
|
if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0)
|
|
!= old_dir->i_ino)
|
|
goto end_rename;
|
|
|
|
retval = -EMLINK;
|
|
if (!new_inode && new_dir->i_nlink >= (256<<sizeof(new_dir->i_nlink))-1)
|
|
goto end_rename;
|
|
}
|
|
if (!nfi)
|
|
{
|
|
nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi, &retval);
|
|
if (!nfi)
|
|
goto end_rename;
|
|
}
|
|
|
|
/*
|
|
* Like most other Unix systems, set the ctime for inodes on a
|
|
* rename.
|
|
*/
|
|
old_inode->i_ctime = current_fs_time(old_inode->i_sb);
|
|
mark_inode_dirty(old_inode);
|
|
|
|
/*
|
|
* ok, that's it
|
|
*/
|
|
ncfi.fileVersionNum = ocfi.fileVersionNum;
|
|
ncfi.fileCharacteristics = ocfi.fileCharacteristics;
|
|
memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
|
|
udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
|
|
|
|
/* The old fid may have moved - find it again */
|
|
ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
|
|
udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
|
|
|
|
if (new_inode)
|
|
{
|
|
new_inode->i_nlink--;
|
|
new_inode->i_ctime = current_fs_time(new_inode->i_sb);
|
|
mark_inode_dirty(new_inode);
|
|
}
|
|
old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
|
|
mark_inode_dirty(old_dir);
|
|
|
|
if (dir_fi)
|
|
{
|
|
dir_fi->icb.extLocation = cpu_to_lelb(UDF_I_LOCATION(new_dir));
|
|
udf_update_tag((char *)dir_fi, (sizeof(struct fileIdentDesc) +
|
|
le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
|
|
if (UDF_I_ALLOCTYPE(old_inode) == ICBTAG_FLAG_AD_IN_ICB)
|
|
{
|
|
mark_inode_dirty(old_inode);
|
|
}
|
|
else
|
|
mark_buffer_dirty_inode(dir_bh, old_inode);
|
|
old_dir->i_nlink --;
|
|
mark_inode_dirty(old_dir);
|
|
if (new_inode)
|
|
{
|
|
new_inode->i_nlink --;
|
|
mark_inode_dirty(new_inode);
|
|
}
|
|
else
|
|
{
|
|
new_dir->i_nlink ++;
|
|
mark_inode_dirty(new_dir);
|
|
}
|
|
}
|
|
|
|
if (ofi)
|
|
{
|
|
if (ofibh.sbh != ofibh.ebh)
|
|
udf_release_data(ofibh.ebh);
|
|
udf_release_data(ofibh.sbh);
|
|
}
|
|
|
|
retval = 0;
|
|
|
|
end_rename:
|
|
udf_release_data(dir_bh);
|
|
if (nfi)
|
|
{
|
|
if (nfibh.sbh != nfibh.ebh)
|
|
udf_release_data(nfibh.ebh);
|
|
udf_release_data(nfibh.sbh);
|
|
}
|
|
unlock_kernel();
|
|
return retval;
|
|
}
|
|
|
|
struct inode_operations udf_dir_inode_operations = {
|
|
.lookup = udf_lookup,
|
|
.create = udf_create,
|
|
.link = udf_link,
|
|
.unlink = udf_unlink,
|
|
.symlink = udf_symlink,
|
|
.mkdir = udf_mkdir,
|
|
.rmdir = udf_rmdir,
|
|
.mknod = udf_mknod,
|
|
.rename = udf_rename,
|
|
};
|
|
|