[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/udf/namei.c b/src/kernel/linux/v4.14/fs/udf/namei.c
new file mode 100644
index 0000000..041bf34
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/udf/namei.c
@@ -0,0 +1,1360 @@
+/*
+ * namei.c
+ *
+ * PURPOSE
+ * Inode name handling routines for the OSTA-UDF(tm) filesystem.
+ *
+ * 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/sched.h>
+#include <linux/crc-itu-t.h>
+#include <linux/exportfs.h>
+
+static inline int udf_match(int len1, const unsigned char *name1, int len2,
+ const unsigned 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(struct tag);
+ uint16_t crc;
+ 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(inode)->i_alloc_type == 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 = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
+ sizeof(struct fileIdentDesc) - sizeof(struct tag));
+
+ if (fibh->sbh == fibh->ebh) {
+ crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
+ crclen + sizeof(struct tag) -
+ sizeof(struct fileIdentDesc));
+ } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
+ crc = crc_itu_t(crc, fibh->ebh->b_data +
+ sizeof(struct fileIdentDesc) +
+ fibh->soffset,
+ crclen + sizeof(struct tag) -
+ sizeof(struct fileIdentDesc));
+ } else {
+ crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
+ -fibh->soffset - sizeof(struct fileIdentDesc));
+ crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
+ }
+
+ cfi->descTag.descCRC = cpu_to_le16(crc);
+ cfi->descTag.descCRCLength = cpu_to_le16(crclen);
+ cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
+
+ 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;
+}
+
+/**
+ * udf_find_entry - find entry in given directory.
+ *
+ * @dir: directory inode to search in
+ * @child: qstr of the name
+ * @fibh: buffer head / inode with file identifier descriptor we found
+ * @cfi: found file identifier descriptor with given name
+ *
+ * This function searches in the directory @dir for a file name @child. When
+ * found, @fibh points to the buffer head(s) (bh is NULL for in ICB
+ * directories) containing the file identifier descriptor (FID). In that case
+ * the function returns pointer to the FID in the buffer or inode - but note
+ * that FID may be split among two buffers (blocks) so accessing it via that
+ * pointer isn't easily possible. This pointer can be used only as an iterator
+ * for other directory manipulation functions. For inspection of the FID @cfi
+ * can be used - the found FID is copied there.
+ *
+ * Returns pointer to FID, NULL when nothing found, or error code.
+ */
+static struct fileIdentDesc *udf_find_entry(struct inode *dir,
+ const struct qstr *child,
+ struct udf_fileident_bh *fibh,
+ struct fileIdentDesc *cfi)
+{
+ struct fileIdentDesc *fi = NULL;
+ loff_t f_pos;
+ int block, flen;
+ unsigned char *fname = NULL, *copy_name = NULL;
+ unsigned char *nameptr;
+ uint8_t lfi;
+ uint16_t liu;
+ loff_t size;
+ struct kernel_lb_addr eloc;
+ uint32_t elen;
+ sector_t offset;
+ struct extent_position epos = {};
+ struct udf_inode_info *dinfo = UDF_I(dir);
+ int isdotdot = child->len == 2 &&
+ child->name[0] == '.' && child->name[1] == '.';
+ struct super_block *sb = dir->i_sb;
+
+ size = udf_ext0_offset(dir) + dir->i_size;
+ f_pos = udf_ext0_offset(dir);
+
+ fibh->sbh = fibh->ebh = NULL;
+ fibh->soffset = fibh->eoffset = f_pos & (sb->s_blocksize - 1);
+ if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos,
+ &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
+ fi = ERR_PTR(-EIO);
+ goto out_err;
+ }
+
+ block = udf_get_lb_pblock(sb, &eloc, offset);
+ if ((++offset << sb->s_blocksize_bits) < elen) {
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ epos.offset -= sizeof(struct short_ad);
+ else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ epos.offset -= sizeof(struct long_ad);
+ } else
+ offset = 0;
+
+ fibh->sbh = fibh->ebh = udf_tread(sb, block);
+ if (!fibh->sbh) {
+ fi = ERR_PTR(-EIO);
+ goto out_err;
+ }
+ }
+
+ fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ if (!fname) {
+ fi = ERR_PTR(-ENOMEM);
+ goto out_err;
+ }
+
+ while (f_pos < size) {
+ fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
+ &elen, &offset);
+ if (!fi) {
+ fi = ERR_PTR(-EIO);
+ goto out_err;
+ }
+
+ 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 {
+ if (!copy_name) {
+ copy_name = kmalloc(UDF_NAME_LEN,
+ GFP_NOFS);
+ if (!copy_name) {
+ fi = ERR_PTR(-ENOMEM);
+ goto out_err;
+ }
+ }
+ nameptr = copy_name;
+ 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(sb, UDF_FLAG_UNDELETE))
+ continue;
+ }
+
+ if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
+ continue;
+ }
+
+ if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
+ isdotdot)
+ goto out_ok;
+
+ if (!lfi)
+ continue;
+
+ flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
+ if (flen < 0) {
+ fi = ERR_PTR(flen);
+ goto out_err;
+ }
+
+ if (udf_match(flen, fname, child->len, child->name))
+ goto out_ok;
+ }
+
+ fi = NULL;
+out_err:
+ if (fibh->sbh != fibh->ebh)
+ brelse(fibh->ebh);
+ brelse(fibh->sbh);
+out_ok:
+ brelse(epos.bh);
+ kfree(fname);
+ kfree(copy_name);
+
+ return fi;
+}
+
+static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
+ unsigned int flags)
+{
+ struct inode *inode = NULL;
+ struct fileIdentDesc cfi;
+ struct udf_fileident_bh fibh;
+ struct fileIdentDesc *fi;
+
+ if (dentry->d_name.len > UDF_NAME_LEN)
+ return ERR_PTR(-ENAMETOOLONG);
+
+#ifdef UDF_RECOVERY
+ /* temporary shorthand for specifying files by inode number */
+ if (!strncmp(dentry->d_name.name, ".B=", 3)) {
+ struct kernel_lb_addr lb = {
+ .logicalBlockNum = 0,
+ .partitionReferenceNum =
+ simple_strtoul(dentry->d_name.name + 3,
+ NULL, 0),
+ };
+ inode = udf_iget(dir->i_sb, lb);
+ if (IS_ERR(inode))
+ return inode;
+ } else
+#endif /* UDF_RECOVERY */
+
+ fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
+ if (IS_ERR(fi))
+ return ERR_CAST(fi);
+
+ if (fi) {
+ struct kernel_lb_addr loc;
+
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+
+ loc = lelb_to_cpu(cfi.icb.extLocation);
+ inode = udf_iget(dir->i_sb, &loc);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
+ }
+
+ return d_splice_alias(inode, dentry);
+}
+
+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 = dir->i_sb;
+ struct fileIdentDesc *fi = NULL;
+ unsigned char *name = NULL;
+ int namelen;
+ loff_t f_pos;
+ loff_t size = udf_ext0_offset(dir) + dir->i_size;
+ int nfidlen;
+ uint8_t lfi;
+ uint16_t liu;
+ int block;
+ struct kernel_lb_addr eloc;
+ uint32_t elen = 0;
+ sector_t offset;
+ struct extent_position epos = {};
+ struct udf_inode_info *dinfo;
+
+ fibh->sbh = fibh->ebh = NULL;
+ name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS);
+ if (!name) {
+ *err = -ENOMEM;
+ goto out_err;
+ }
+
+ if (dentry) {
+ if (!dentry->d_name.len) {
+ *err = -EINVAL;
+ goto out_err;
+ }
+ namelen = udf_put_filename(sb, dentry->d_name.name,
+ dentry->d_name.len,
+ name, UDF_NAME_LEN_CS0);
+ if (!namelen) {
+ *err = -ENAMETOOLONG;
+ goto out_err;
+ }
+ } else {
+ namelen = 0;
+ }
+
+ nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
+
+ f_pos = udf_ext0_offset(dir);
+
+ fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
+ dinfo = UDF_I(dir);
+ if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
+ &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
+ block = udf_get_lb_pblock(dir->i_sb,
+ &dinfo->i_location, 0);
+ fibh->soffset = fibh->eoffset = sb->s_blocksize;
+ goto add;
+ }
+ block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
+ if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ epos.offset -= sizeof(struct short_ad);
+ else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ epos.offset -= sizeof(struct long_ad);
+ } else
+ offset = 0;
+
+ fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
+ if (!fibh->sbh) {
+ *err = -EIO;
+ goto out_err;
+ }
+
+ block = dinfo->i_location.logicalBlockNum;
+ }
+
+ while (f_pos < size) {
+ fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
+ &elen, &offset);
+
+ if (!fi) {
+ *err = -EIO;
+ goto out_err;
+ }
+
+ liu = le16_to_cpu(cfi->lengthOfImpUse);
+ lfi = cfi->lengthFileIdent;
+
+ if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
+ if (((sizeof(struct fileIdentDesc) +
+ liu + lfi + 3) & ~3) == nfidlen) {
+ 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))
+ goto out_ok;
+ else {
+ *err = -EIO;
+ goto out_err;
+ }
+ }
+ }
+ }
+
+add:
+ f_pos += nfidlen;
+
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
+ sb->s_blocksize - fibh->eoffset < nfidlen) {
+ brelse(epos.bh);
+ epos.bh = NULL;
+ fibh->soffset -= udf_ext0_offset(dir);
+ fibh->eoffset -= udf_ext0_offset(dir);
+ f_pos -= udf_ext0_offset(dir);
+ if (fibh->sbh != fibh->ebh)
+ brelse(fibh->ebh);
+ brelse(fibh->sbh);
+ fibh->sbh = fibh->ebh =
+ udf_expand_dir_adinicb(dir, &block, err);
+ if (!fibh->sbh)
+ goto out_err;
+ epos.block = dinfo->i_location;
+ epos.offset = udf_file_entry_alloc_offset(dir);
+ /* Load extent udf_expand_dir_adinicb() has created */
+ udf_current_aext(dir, &epos, &eloc, &elen, 1);
+ }
+
+ /* Entry fits into current block? */
+ if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
+ fibh->soffset = fibh->eoffset;
+ fibh->eoffset += nfidlen;
+ if (fibh->sbh != fibh->ebh) {
+ brelse(fibh->sbh);
+ fibh->sbh = fibh->ebh;
+ }
+
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ block = dinfo->i_location.logicalBlockNum;
+ fi = (struct fileIdentDesc *)
+ (dinfo->i_ext.i_data +
+ fibh->soffset -
+ udf_ext0_offset(dir) +
+ dinfo->i_lenEAttr);
+ } else {
+ block = eloc.logicalBlockNum +
+ ((elen - 1) >>
+ dir->i_sb->s_blocksize_bits);
+ fi = (struct fileIdentDesc *)
+ (fibh->sbh->b_data + fibh->soffset);
+ }
+ } else {
+ /* Round up last extent in the file */
+ elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ epos.offset -= sizeof(struct short_ad);
+ else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ epos.offset -= sizeof(struct long_ad);
+ udf_write_aext(dir, &epos, &eloc, elen, 1);
+ dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
+ - 1) & ~(sb->s_blocksize - 1);
+
+ fibh->soffset = fibh->eoffset - sb->s_blocksize;
+ fibh->eoffset += nfidlen - sb->s_blocksize;
+ if (fibh->sbh != fibh->ebh) {
+ brelse(fibh->sbh);
+ fibh->sbh = fibh->ebh;
+ }
+
+ block = eloc.logicalBlockNum + ((elen - 1) >>
+ dir->i_sb->s_blocksize_bits);
+ fibh->ebh = udf_bread(dir,
+ f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
+ if (!fibh->ebh)
+ goto out_err;
+ /* Extents could have been merged, invalidate our position */
+ brelse(epos.bh);
+ epos.bh = NULL;
+ epos.block = dinfo->i_location;
+ epos.offset = udf_file_entry_alloc_offset(dir);
+
+ if (!fibh->soffset) {
+ /* Find the freshly allocated block */
+ while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
+ (EXT_RECORDED_ALLOCATED >> 30))
+ ;
+ block = eloc.logicalBlockNum + ((elen - 1) >>
+ dir->i_sb->s_blocksize_bits);
+ brelse(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(sb)->s_udfrev >= 0x0200)
+ udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
+ sizeof(struct tag));
+ else
+ udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
+ sizeof(struct 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)) {
+ dir->i_size += nfidlen;
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ dinfo->i_lenAlloc += nfidlen;
+ else {
+ /* Find the last extent and truncate it to proper size */
+ while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
+ (EXT_RECORDED_ALLOCATED >> 30))
+ ;
+ elen -= dinfo->i_lenExtents - dir->i_size;
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ epos.offset -= sizeof(struct short_ad);
+ else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ epos.offset -= sizeof(struct long_ad);
+ udf_write_aext(dir, &epos, &eloc, elen, 1);
+ dinfo->i_lenExtents = dir->i_size;
+ }
+
+ mark_inode_dirty(dir);
+ goto out_ok;
+ } else {
+ *err = -EIO;
+ goto out_err;
+ }
+
+out_err:
+ fi = NULL;
+ if (fibh->sbh != fibh->ebh)
+ brelse(fibh->ebh);
+ brelse(fibh->sbh);
+out_ok:
+ brelse(epos.bh);
+ kfree(name);
+ return fi;
+}
+
+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(struct long_ad));
+
+ return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
+}
+
+static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
+{
+ struct udf_inode_info *iinfo = UDF_I(inode);
+ struct inode *dir = d_inode(dentry->d_parent);
+ struct udf_fileident_bh fibh;
+ struct fileIdentDesc cfi, *fi;
+ int err;
+
+ fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
+ if (unlikely(!fi)) {
+ inode_dec_link_count(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ return err;
+ }
+ cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
+ cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
+ *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
+ cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
+ udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
+ dir->i_ctime = dir->i_mtime = current_time(dir);
+ mark_inode_dirty(dir);
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+ d_instantiate_new(dentry, inode);
+
+ return 0;
+}
+
+static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool excl)
+{
+ struct inode *inode = udf_new_inode(dir, mode);
+
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ if (UDF_I(inode)->i_alloc_type == 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;
+ mark_inode_dirty(inode);
+
+ return udf_add_nondir(dentry, inode);
+}
+
+static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct inode *inode = udf_new_inode(dir, mode);
+
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ if (UDF_I(inode)->i_alloc_type == 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;
+ mark_inode_dirty(inode);
+ d_tmpfile(dentry, inode);
+ unlock_new_inode(inode);
+ return 0;
+}
+
+static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
+ dev_t rdev)
+{
+ struct inode *inode;
+
+ if (!old_valid_dev(rdev))
+ return -EINVAL;
+
+ inode = udf_new_inode(dir, mode);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ init_special_inode(inode, mode, rdev);
+ return udf_add_nondir(dentry, inode);
+}
+
+static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct inode *inode;
+ struct udf_fileident_bh fibh;
+ struct fileIdentDesc cfi, *fi;
+ int err;
+ struct udf_inode_info *dinfo = UDF_I(dir);
+ struct udf_inode_info *iinfo;
+
+ inode = udf_new_inode(dir, S_IFDIR | mode);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ iinfo = UDF_I(inode);
+ inode->i_op = &udf_dir_inode_operations;
+ inode->i_fop = &udf_dir_operations;
+ fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
+ if (!fi) {
+ inode_dec_link_count(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ goto out;
+ }
+ set_nlink(inode, 2);
+ cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
+ cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
+ *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
+ cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
+ cfi.fileCharacteristics =
+ FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
+ udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
+ brelse(fibh.sbh);
+ mark_inode_dirty(inode);
+
+ fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
+ if (!fi) {
+ clear_nlink(inode);
+ mark_inode_dirty(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ goto out;
+ }
+ cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
+ cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
+ *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
+ cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
+ cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
+ udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
+ inc_nlink(dir);
+ dir->i_ctime = dir->i_mtime = current_time(dir);
+ mark_inode_dirty(dir);
+ d_instantiate_new(dentry, inode);
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+ err = 0;
+
+out:
+ 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;
+ int block;
+ struct kernel_lb_addr eloc;
+ uint32_t elen;
+ sector_t offset;
+ struct extent_position epos = {};
+ struct udf_inode_info *dinfo = UDF_I(dir);
+
+ f_pos = udf_ext0_offset(dir);
+ fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
+
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ fibh.sbh = fibh.ebh = NULL;
+ else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
+ &epos, &eloc, &elen, &offset) ==
+ (EXT_RECORDED_ALLOCATED >> 30)) {
+ block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
+ if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ epos.offset -= sizeof(struct short_ad);
+ else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ epos.offset -= sizeof(struct long_ad);
+ } else
+ offset = 0;
+
+ fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
+ if (!fibh.sbh) {
+ brelse(epos.bh);
+ return 0;
+ }
+ } else {
+ brelse(epos.bh);
+ return 0;
+ }
+
+ while (f_pos < size) {
+ fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
+ &elen, &offset);
+ if (!fi) {
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+ brelse(epos.bh);
+ return 0;
+ }
+
+ if (cfi.lengthFileIdent &&
+ (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+ brelse(epos.bh);
+ return 0;
+ }
+ }
+
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+ brelse(epos.bh);
+
+ return 1;
+}
+
+static int udf_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ int retval;
+ struct inode *inode = d_inode(dentry);
+ struct udf_fileident_bh fibh;
+ struct fileIdentDesc *fi, cfi;
+ struct kernel_lb_addr tloc;
+
+ retval = -ENOENT;
+ fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
+ if (IS_ERR_OR_NULL(fi)) {
+ if (fi)
+ retval = PTR_ERR(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_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
+ inode->i_nlink);
+ clear_nlink(inode);
+ inode->i_size = 0;
+ inode_dec_link_count(dir);
+ inode->i_ctime = dir->i_ctime = dir->i_mtime =
+ current_time(inode);
+ mark_inode_dirty(dir);
+
+end_rmdir:
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+
+out:
+ return retval;
+}
+
+static int udf_unlink(struct inode *dir, struct dentry *dentry)
+{
+ int retval;
+ struct inode *inode = d_inode(dentry);
+ struct udf_fileident_bh fibh;
+ struct fileIdentDesc *fi;
+ struct fileIdentDesc cfi;
+ struct kernel_lb_addr tloc;
+
+ retval = -ENOENT;
+ fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
+
+ if (IS_ERR_OR_NULL(fi)) {
+ if (fi)
+ retval = PTR_ERR(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);
+ set_nlink(inode, 1);
+ }
+ retval = udf_delete_entry(dir, fi, &fibh, &cfi);
+ if (retval)
+ goto end_unlink;
+ dir->i_ctime = dir->i_mtime = current_time(dir);
+ mark_inode_dirty(dir);
+ inode_dec_link_count(inode);
+ inode->i_ctime = dir->i_ctime;
+ retval = 0;
+
+end_unlink:
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+
+out:
+ return retval;
+}
+
+static int udf_symlink(struct inode *dir, struct dentry *dentry,
+ const char *symname)
+{
+ struct inode *inode = udf_new_inode(dir, S_IFLNK | 0777);
+ struct pathComponent *pc;
+ const char *compstart;
+ struct extent_position epos = {};
+ int eoffset, elen = 0;
+ uint8_t *ea;
+ int err;
+ int block;
+ unsigned char *name = NULL;
+ int namelen;
+ struct udf_inode_info *iinfo;
+ struct super_block *sb = dir->i_sb;
+
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ iinfo = UDF_I(inode);
+ down_write(&iinfo->i_data_sem);
+ name = kmalloc(UDF_NAME_LEN_CS0, GFP_NOFS);
+ if (!name) {
+ err = -ENOMEM;
+ goto out_no_entry;
+ }
+
+ inode->i_data.a_ops = &udf_symlink_aops;
+ inode->i_op = &udf_symlink_inode_operations;
+ inode_nohighmem(inode);
+
+ if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ struct kernel_lb_addr eloc;
+ uint32_t bsize;
+
+ block = udf_new_block(sb, inode,
+ iinfo->i_location.partitionReferenceNum,
+ iinfo->i_location.logicalBlockNum, &err);
+ if (!block)
+ goto out_no_entry;
+ epos.block = iinfo->i_location;
+ epos.offset = udf_file_entry_alloc_offset(inode);
+ epos.bh = NULL;
+ eloc.logicalBlockNum = block;
+ eloc.partitionReferenceNum =
+ iinfo->i_location.partitionReferenceNum;
+ bsize = sb->s_blocksize;
+ iinfo->i_lenExtents = bsize;
+ udf_add_aext(inode, &epos, &eloc, bsize, 0);
+ brelse(epos.bh);
+
+ block = udf_get_pblock(sb, block,
+ iinfo->i_location.partitionReferenceNum,
+ 0);
+ epos.bh = udf_tgetblk(sb, block);
+ lock_buffer(epos.bh);
+ memset(epos.bh->b_data, 0x00, bsize);
+ set_buffer_uptodate(epos.bh);
+ unlock_buffer(epos.bh);
+ mark_buffer_dirty_inode(epos.bh, inode);
+ ea = epos.bh->b_data + udf_ext0_offset(inode);
+ } else
+ ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
+
+ eoffset = 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;
+ elen += sizeof(struct pathComponent);
+ }
+
+ err = -ENAMETOOLONG;
+
+ while (*symname) {
+ if (elen + sizeof(struct pathComponent) > eoffset)
+ goto out_no_entry;
+
+ pc = (struct pathComponent *)(ea + elen);
+
+ compstart = 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) {
+ namelen = udf_put_filename(sb, compstart,
+ symname - compstart,
+ name, UDF_NAME_LEN_CS0);
+ if (!namelen)
+ 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 == '/');
+ }
+ }
+
+ brelse(epos.bh);
+ inode->i_size = elen;
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ iinfo->i_lenAlloc = inode->i_size;
+ else
+ udf_truncate_tail_extent(inode);
+ mark_inode_dirty(inode);
+ up_write(&iinfo->i_data_sem);
+
+ err = udf_add_nondir(dentry, inode);
+out:
+ kfree(name);
+ return err;
+
+out_no_entry:
+ up_write(&iinfo->i_data_sem);
+ inode_dec_link_count(inode);
+ unlock_new_inode(inode);
+ iput(inode);
+ goto out;
+}
+
+static int udf_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
+{
+ struct inode *inode = d_inode(old_dentry);
+ struct udf_fileident_bh fibh;
+ struct fileIdentDesc cfi, *fi;
+ int err;
+
+ fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
+ if (!fi) {
+ return err;
+ }
+ cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
+ cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
+ if (UDF_SB(inode->i_sb)->s_lvid_bh) {
+ *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
+ cpu_to_le32(lvid_get_unique_id(inode->i_sb));
+ }
+ udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
+ if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ mark_inode_dirty(dir);
+
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+ inc_nlink(inode);
+ inode->i_ctime = current_time(inode);
+ mark_inode_dirty(inode);
+ dir->i_ctime = dir->i_mtime = current_time(dir);
+ mark_inode_dirty(dir);
+ ihold(inode);
+ d_instantiate(dentry, inode);
+
+ 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,
+ unsigned int flags)
+{
+ struct inode *old_inode = d_inode(old_dentry);
+ struct inode *new_inode = d_inode(new_dentry);
+ struct udf_fileident_bh ofibh, nfibh;
+ struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
+ struct fileIdentDesc ocfi, ncfi;
+ struct buffer_head *dir_bh = NULL;
+ int retval = -ENOENT;
+ struct kernel_lb_addr tloc;
+ struct udf_inode_info *old_iinfo = UDF_I(old_inode);
+
+ if (flags & ~RENAME_NOREPLACE)
+ return -EINVAL;
+
+ ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
+ if (IS_ERR(ofi)) {
+ retval = PTR_ERR(ofi);
+ goto end_rename;
+ }
+
+ if (ofibh.sbh != ofibh.ebh)
+ brelse(ofibh.ebh);
+
+ brelse(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->d_name, &nfibh, &ncfi);
+ if (IS_ERR(nfi)) {
+ retval = PTR_ERR(nfi);
+ goto end_rename;
+ }
+ if (nfi && !new_inode) {
+ if (nfibh.sbh != nfibh.ebh)
+ brelse(nfibh.ebh);
+ brelse(nfibh.sbh);
+ nfi = NULL;
+ }
+ if (S_ISDIR(old_inode->i_mode)) {
+ int offset = udf_ext0_offset(old_inode);
+
+ if (new_inode) {
+ retval = -ENOTEMPTY;
+ if (!empty_dir(new_inode))
+ goto end_rename;
+ }
+ retval = -EIO;
+ if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ dir_fi = udf_get_fileident(
+ old_iinfo->i_ext.i_data -
+ (old_iinfo->i_efe ?
+ 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;
+ }
+ 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_time(old_inode);
+ mark_inode_dirty(old_inode);
+
+ /*
+ * ok, that's it
+ */
+ ncfi.fileVersionNum = ocfi.fileVersionNum;
+ ncfi.fileCharacteristics = ocfi.fileCharacteristics;
+ memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(ocfi.icb));
+ 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->d_name, &ofibh, &ocfi);
+ udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
+
+ if (new_inode) {
+ new_inode->i_ctime = current_time(new_inode);
+ inode_dec_link_count(new_inode);
+ }
+ old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
+ new_dir->i_ctime = new_dir->i_mtime = current_time(new_dir);
+ mark_inode_dirty(old_dir);
+ mark_inode_dirty(new_dir);
+
+ if (dir_fi) {
+ dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
+ udf_update_tag((char *)dir_fi,
+ (sizeof(struct fileIdentDesc) +
+ le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
+ if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ mark_inode_dirty(old_inode);
+ else
+ mark_buffer_dirty_inode(dir_bh, old_inode);
+
+ inode_dec_link_count(old_dir);
+ if (new_inode)
+ inode_dec_link_count(new_inode);
+ else {
+ inc_nlink(new_dir);
+ mark_inode_dirty(new_dir);
+ }
+ }
+
+ if (ofi) {
+ if (ofibh.sbh != ofibh.ebh)
+ brelse(ofibh.ebh);
+ brelse(ofibh.sbh);
+ }
+
+ retval = 0;
+
+end_rename:
+ brelse(dir_bh);
+ if (nfi) {
+ if (nfibh.sbh != nfibh.ebh)
+ brelse(nfibh.ebh);
+ brelse(nfibh.sbh);
+ }
+
+ return retval;
+}
+
+static struct dentry *udf_get_parent(struct dentry *child)
+{
+ struct kernel_lb_addr tloc;
+ struct inode *inode = NULL;
+ struct qstr dotdot = QSTR_INIT("..", 2);
+ struct fileIdentDesc cfi;
+ struct udf_fileident_bh fibh;
+
+ if (!udf_find_entry(d_inode(child), &dotdot, &fibh, &cfi))
+ return ERR_PTR(-EACCES);
+
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+
+ tloc = lelb_to_cpu(cfi.icb.extLocation);
+ inode = udf_iget(child->d_sb, &tloc);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
+
+ return d_obtain_alias(inode);
+}
+
+
+static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
+ u16 partref, __u32 generation)
+{
+ struct inode *inode;
+ struct kernel_lb_addr loc;
+
+ if (block == 0)
+ return ERR_PTR(-ESTALE);
+
+ loc.logicalBlockNum = block;
+ loc.partitionReferenceNum = partref;
+ inode = udf_iget(sb, &loc);
+
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
+
+ if (generation && inode->i_generation != generation) {
+ iput(inode);
+ return ERR_PTR(-ESTALE);
+ }
+ return d_obtain_alias(inode);
+}
+
+static struct dentry *udf_fh_to_dentry(struct super_block *sb,
+ struct fid *fid, int fh_len, int fh_type)
+{
+ if (fh_len < 3 ||
+ (fh_type != FILEID_UDF_WITH_PARENT &&
+ fh_type != FILEID_UDF_WITHOUT_PARENT))
+ return NULL;
+
+ return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
+ fid->udf.generation);
+}
+
+static struct dentry *udf_fh_to_parent(struct super_block *sb,
+ struct fid *fid, int fh_len, int fh_type)
+{
+ if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT)
+ return NULL;
+
+ return udf_nfs_get_inode(sb, fid->udf.parent_block,
+ fid->udf.parent_partref,
+ fid->udf.parent_generation);
+}
+static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
+ struct inode *parent)
+{
+ int len = *lenp;
+ struct kernel_lb_addr location = UDF_I(inode)->i_location;
+ struct fid *fid = (struct fid *)fh;
+ int type = FILEID_UDF_WITHOUT_PARENT;
+
+ if (parent && (len < 5)) {
+ *lenp = 5;
+ return FILEID_INVALID;
+ } else if (len < 3) {
+ *lenp = 3;
+ return FILEID_INVALID;
+ }
+
+ *lenp = 3;
+ fid->udf.block = location.logicalBlockNum;
+ fid->udf.partref = location.partitionReferenceNum;
+ fid->udf.parent_partref = 0;
+ fid->udf.generation = inode->i_generation;
+
+ if (parent) {
+ location = UDF_I(parent)->i_location;
+ fid->udf.parent_block = location.logicalBlockNum;
+ fid->udf.parent_partref = location.partitionReferenceNum;
+ fid->udf.parent_generation = inode->i_generation;
+ *lenp = 5;
+ type = FILEID_UDF_WITH_PARENT;
+ }
+
+ return type;
+}
+
+const struct export_operations udf_export_ops = {
+ .encode_fh = udf_encode_fh,
+ .fh_to_dentry = udf_fh_to_dentry,
+ .fh_to_parent = udf_fh_to_parent,
+ .get_parent = udf_get_parent,
+};
+
+const 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,
+ .tmpfile = udf_tmpfile,
+};