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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/udf/namei.c
downloadop-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip
op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/udf/namei.c')
-rw-r--r--fs/udf/namei.c1334
1 files changed, 1334 insertions, 0 deletions
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
new file mode 100644
index 0000000..3f6dc71
--- /dev/null
+++ b/fs/udf/namei.c
@@ -0,0 +1,1334 @@
+/*
+ * namei.c
+ *
+ * PURPOSE
+ * Inode name handling routines for the OSTA-UDF(tm) filesystem.
+ *
+ * CONTACTS
+ * E-mail regarding any portion of the Linux UDF file system should be
+ * directed to the development team mailing list (run by majordomo):
+ * linux_udf@hpesjro.fc.hp.com
+ *
+ * COPYRIGHT
+ * This file is distributed under the terms of the GNU General Public
+ * License (GPL). Copies of the GPL can be obtained from:
+ * ftp://prep.ai.mit.edu/pub/gnu/GPL
+ * Each contributing author retains all rights to their own work.
+ *
+ * (C) 1998-2004 Ben Fennema
+ * (C) 1999-2000 Stelias Computing Inc
+ *
+ * HISTORY
+ *
+ * 12/12/98 blf Created. Split out the lookup code from dir.c
+ * 04/19/99 blf link, mknod, symlink support
+ */
+
+#include "udfdecl.h"
+
+#include "udf_i.h"
+#include "udf_sb.h"
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/quotaops.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+
+static inline int udf_match(int len1, const char *name1, int len2, const char *name2)
+{
+ if (len1 != len2)
+ return 0;
+ return !memcmp(name1, name2, len1);
+}
+
+int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
+ struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
+ uint8_t *impuse, uint8_t *fileident)
+{
+ uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
+ uint16_t crc;
+ uint8_t checksum = 0;
+ int i;
+ int offset;
+ uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
+ uint8_t lfi = cfi->lengthFileIdent;
+ int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
+ sizeof(struct fileIdentDesc);
+ int adinicb = 0;
+
+ if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
+ adinicb = 1;
+
+ offset = fibh->soffset + sizeof(struct fileIdentDesc);
+
+ if (impuse)
+ {
+ if (adinicb || (offset + liu < 0))
+ memcpy((uint8_t *)sfi->impUse, impuse, liu);
+ else if (offset >= 0)
+ memcpy(fibh->ebh->b_data + offset, impuse, liu);
+ else
+ {
+ memcpy((uint8_t *)sfi->impUse, impuse, -offset);
+ memcpy(fibh->ebh->b_data, impuse - offset, liu + offset);
+ }
+ }
+
+ offset += liu;
+
+ if (fileident)
+ {
+ if (adinicb || (offset + lfi < 0))
+ memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
+ else if (offset >= 0)
+ memcpy(fibh->ebh->b_data + offset, fileident, lfi);
+ else
+ {
+ memcpy((uint8_t *)sfi->fileIdent + liu, fileident, -offset);
+ memcpy(fibh->ebh->b_data, fileident - offset, lfi + offset);
+ }
+ }
+
+ offset += lfi;
+
+ if (adinicb || (offset + padlen < 0))
+ memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
+ else if (offset >= 0)
+ memset(fibh->ebh->b_data + offset, 0x00, padlen);
+ else
+ {
+ memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
+ memset(fibh->ebh->b_data, 0x00, padlen + offset);
+ }
+
+ crc = udf_crc((uint8_t *)cfi + sizeof(tag), sizeof(struct fileIdentDesc) -
+ sizeof(tag), 0);
+
+ if (fibh->sbh == fibh->ebh)
+ crc = udf_crc((uint8_t *)sfi->impUse,
+ crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc);
+ else if (sizeof(struct fileIdentDesc) >= -fibh->soffset)
+ crc = udf_crc(fibh->ebh->b_data + sizeof(struct fileIdentDesc) + fibh->soffset,
+ crclen + sizeof(tag) - sizeof(struct fileIdentDesc), crc);
+ else
+ {
+ crc = udf_crc((uint8_t *)sfi->impUse,
+ -fibh->soffset - sizeof(struct fileIdentDesc), crc);
+ crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc);
+ }
+
+ cfi->descTag.descCRC = cpu_to_le16(crc);
+ cfi->descTag.descCRCLength = cpu_to_le16(crclen);
+
+ for (i=0; i<16; i++)
+ if (i != 4)
+ checksum += ((uint8_t *)&cfi->descTag)[i];
+
+ cfi->descTag.tagChecksum = checksum;
+ if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset))
+ memcpy((uint8_t *)sfi, (uint8_t *)cfi, sizeof(struct fileIdentDesc));
+ else
+ {
+ memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
+ memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
+ sizeof(struct fileIdentDesc) + fibh->soffset);
+ }
+
+ if (adinicb)
+ mark_inode_dirty(inode);
+ else
+ {
+ if (fibh->sbh != fibh->ebh)
+ mark_buffer_dirty_inode(fibh->ebh, inode);
+ mark_buffer_dirty_inode(fibh->sbh, inode);
+ }
+ return 0;
+}
+
+static struct fileIdentDesc *
+udf_find_entry(struct inode *dir, struct dentry *dentry,
+ struct udf_fileident_bh *fibh,
+ struct fileIdentDesc *cfi)
+{
+ struct fileIdentDesc *fi=NULL;
+ loff_t f_pos;
+ int block, flen;
+ char fname[UDF_NAME_LEN];
+ char *nameptr;
+ uint8_t lfi;
+ uint16_t liu;
+ loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
+ kernel_lb_addr bloc, eloc;
+ uint32_t extoffset, elen, offset;
+ struct buffer_head *bh = NULL;
+
+ if (!dir)
+ return 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 NULL;
+ }
+ }
+ else
+ {
+ udf_release_data(bh);
+ return NULL;
+ }
+
+ 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 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 = (uint8_t *)(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 ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE) )
+ continue;
+ }
+
+ if ( (cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0 )
+ {
+ if ( !UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE) )
+ continue;
+ }
+
+ if (!lfi)
+ continue;
+
+ if ((flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi)))
+ {
+ if (udf_match(flen, fname, dentry->d_name.len, dentry->d_name.name))
+ {
+ udf_release_data(bh);
+ return fi;
+ }
+ }
+ }
+ if (fibh->sbh != fibh->ebh)
+ udf_release_data(fibh->ebh);
+ udf_release_data(fibh->sbh);
+ udf_release_data(bh);
+ return NULL;
+}
+
+/*
+ * udf_lookup
+ *
+ * PURPOSE
+ * Look-up the inode for a given name.
+ *
+ * DESCRIPTION
+ * Required - lookup_dentry() will return -ENOTDIR if this routine is not
+ * available for a directory. The filesystem is useless if this routine is
+ * not available for at least the filesystem's root directory.
+ *
+ * This routine is passed an incomplete dentry - it must be completed by
+ * calling d_add(dentry, inode). If the name does not exist, then the
+ * specified inode must be set to null. An error should only be returned
+ * when the lookup fails for a reason other than the name not existing.
+ * Note that the directory inode semaphore is held during the call.
+ *
+ * Refer to lookup_dentry() in fs/namei.c
+ * lookup_dentry() -> lookup() -> real_lookup() -> .
+ *
+ * PRE-CONDITIONS
+ * dir Pointer to inode of parent directory.
+ * dentry Pointer to dentry to complete.
+ * nd Pointer to lookup nameidata
+ *
+ * POST-CONDITIONS
+ * <return> Zero on success.
+ *
+ * HISTORY
+ * July 1, 1997 - Andrew E. Mileski
+ * Written, tested, and released.
+ */
+
+static struct dentry *
+udf_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+{
+ struct inode *inode = NULL;
+ struct fileIdentDesc cfi, *fi;
+ struct udf_fileident_bh fibh;
+
+ if (dentry->d_name.len > UDF_NAME_LEN-2)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ lock_kernel();
+#ifdef UDF_RECOVERY
+ /* temporary shorthand for specifying files by inode number */
+ if (!strncmp(dentry->d_name.name, ".B=", 3) )
+ {
+ kernel_lb_addr lb = { 0, simple_strtoul(dentry->d_name.name+3, NULL, 0) };
+ inode = udf_iget(dir->i_sb, lb);
+ if (!inode)
+ {
+ unlock_kernel();
+ return ERR_PTR(-EACCES);
+ }
+ }
+ else
+#endif /* UDF_RECOVERY */
+
+ if ((fi = udf_find_entry(dir, dentry, &fibh, &cfi)))
+ {
+ if (fibh.sbh != fibh.ebh)
+ udf_release_data(fibh.ebh);
+ udf_release_data(fibh.sbh);
+
+ inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
+ if ( !inode )
+ {
+ unlock_kernel();
+ return ERR_PTR(-EACCES);
+ }
+ }
+ unlock_kernel();
+ d_add(dentry, inode);
+ return NULL;
+}
+
+static struct fileIdentDesc *
+udf_add_entry(struct inode *dir, struct dentry *dentry,
+ struct udf_fileident_bh *fibh,
+ struct fileIdentDesc *cfi, int *err)
+{
+ struct super_block *sb;
+ struct fileIdentDesc *fi=NULL;
+ char name[UDF_NAME_LEN], fname[UDF_NAME_LEN];
+ int namelen;
+ loff_t f_pos;
+ int flen;
+ char *nameptr;
+ loff_t size = (udf_ext0_offset(dir) + dir->i_size) >> 2;
+ int nfidlen;
+ uint8_t lfi;
+ uint16_t liu;
+ int block;
+ kernel_lb_addr bloc, eloc;
+ uint32_t extoffset, elen, offset;
+ struct buffer_head *bh = NULL;
+
+ sb = dir->i_sb;
+
+ if (dentry)
+ {
+ if (!dentry->d_name.len)
+ {
+ *err = -EINVAL;
+ return NULL;
+ }
+
+ if ( !(namelen = udf_put_filename(sb, dentry->d_name.name, name, dentry->d_name.len)))
+ {
+ *err = -ENAMETOOLONG;
+ return NULL;
+ }
+ }
+ else
+ namelen = 0;
+
+ nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
+
+ 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);
+ *err = -EIO;
+ 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,
+};
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