Beispiel #1
0
static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry)
{
	struct btstack btstack;
	ino_t inum;
	struct inode *ip;
	struct component_name key;
	const char *name = dentry->d_name.name;
	int len = dentry->d_name.len;
	int rc;

	jFYI(1, ("jfs_lookup: name = %s\n", name));


	if ((name[0] == '.') && (len == 1))
		inum = dip->i_ino;
	else if (strcmp(name, "..") == 0)
		inum = PARENT(dip);
	else {
		if ((rc =
		     get_UCSname(&key, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
			return ERR_PTR(-rc);
		rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
		free_UCSname(&key);
		if (rc == ENOENT) {
			d_add(dentry, NULL);
			return ERR_PTR(0);
		} else if (rc) {
			jERROR(1,
			       ("jfs_lookup: dtSearch returned %d\n", rc));
			return ERR_PTR(-rc);
		}
	}

	ip = iget(dip->i_sb, inum);
	if (ip == NULL) {
		jERROR(1,
		       ("jfs_lookup: iget failed on inum %d\n",
			(uint) inum));
		return ERR_PTR(-EACCES);
	}

	d_add(dentry, ip);

	return ERR_PTR(0);
}
tcstr Sys_Error::ReadCSV(IN size_t iRecord,IN EXCEL_CSV_STRING_VECTOR &out,IN OUT size_t& index,IN bool isCheck)
{
	tcstr szKEY=0;
	tfname_t szHelp;
	szHelp[0]=0;
	if(isCheck && (out.size() != Get_STRUCT_COUNT()) )
	{
		jERROR(_T("parse size error(%d!=Get_STRUCT_COUNT(%d) lineNum=%s"),out.size(),Get_STRUCT_COUNT(),index );
	}
	Set_id(FromString(out[index++],m_id) );
	Set_name(nExcelUtil_StringConverter(out[index++]).getT());
	szKEY = Get_name();
	Set_help(nExcelUtil_StringConverter(out[index++]).getT());
	return szKEY;
}
Beispiel #3
0
/*
 * NAME:        pathlookup_pc
 *
 * FUNCTION:    Lookup path, preserving case.
 *              Lookup path, copying each component into output string
 *		preserving its case.
 *
 * PARAMETERS:  vfsp    - pointer to VFS
 *              path    - full path name
 *              path_pc - output - full path name w/preserved case
 *
 * RETURN:      errors from subroutines.
 *
 * NOTES:	We assume path is in canonical form: "X:\<path>" where there
 *		are no extraneous backslashes and . and .. have been removed.
 *
 *		dtFind is not very efficient for finding a directory entry
 *		without wildcards, but infolevel 7 does not seem to actually
 *		be used anywhere, so it must not be too important.
 */
int32	pathlookup_pc(
	struct vfs	*vfsp,
	UniChar		*path,		/* input - Path */
	UniChar		*path_pc)	/* output - path w/preserved case */
{
	int32		comp_len;
	uint32		count;
	UniChar		*component;
	struct dirent	*dbuf;
	inode_t		*ip;
	int32		offset;
	UniChar		*outptr = path_pc;
	component_t	pattern;
	int		rc;
	UniChar		*slash;
	int32		tbytes;
	struct vnode	*vp;

	if (vfsp == NULL)
	{
		jERROR(2,("pathlookup_pc: invalid VPB!\n"));
		return ENOTDIR;
	}
	/* Copy "X:\" to output string */
	UniStrncpy(outptr, path, 3);
	outptr += 3;
	path += 3;

	if (*path == 0)	
	{
		/* Trivial case "X:\" */
		*outptr = 0;
		return NO_ERROR;
	}

	component = (UniChar *)allocpool(unipool, 0);
	if (component == 0)
		return ENOSPC;
	pattern.name = component;

	dbuf = (struct dirent *)allocpool(dirent_pool, 0);
	if (dbuf == 0)
	{
		freepool(unipool, (caddr_t *)component);
		return ENOSPC;
	}

	vp = vfsp->vfs_mntd;	/* vnode of root directory */
	jfs_hold(vp);

	while (path)
	{
		slash = UniStrchr(path, '\\');
		if (slash)
		{
			comp_len = slash - path;
			slash++;
		}
		else
			comp_len = UniStrlen(path);
		UniStrncpy(component, path, comp_len);
		component[comp_len] = 0;
		UniStrupr(component);		/* Convert to upper case */
		pattern.namlen = comp_len;
		path = slash;

		offset = 0;
		count = 1;
		tbytes = 0;
		rc = dtFind(VP2IP(vp), &pattern, 0, &offset, &count, PSIZE,
			    &tbytes, dbuf);
		jfs_rele(vp);
		if (rc || (count == 0))
		{
			freepool(dirent_pool, (caddr_t *)dbuf);
			freepool(unipool, (caddr_t *)component);
			return ENOENT;
		}
		UniStrncpy(outptr, dbuf->d_name, dbuf->d_namlen);
		outptr += dbuf->d_namlen;

		if (path)
		{
			ICACHE_LOCK();
			rc = iget(vfsp, dbuf->d_ino, &ip, 0);
			ICACHE_UNLOCK();
			if (rc)
			{
				freepool(dirent_pool, (caddr_t *)dbuf);
				freepool(unipool, (caddr_t *)component);
				return rc;
			}
			vp = IP2VP(ip);

			*(outptr++) = '\\';
		}
		else
			*outptr = 0;
	}
	freepool(dirent_pool, (caddr_t *)dbuf);
	freepool(unipool, (caddr_t *)component);
	return NO_ERROR;
}
Beispiel #4
0
/*
 * NAME:	ialloc()
 *
 * FUNCTION:	Allocate a new inode
 *
 */
struct inode *ialloc(struct inode *parent, umode_t mode)
{
	struct super_block *sb = parent->i_sb;
	struct inode *inode;
	struct jfs_inode_info *jfs_inode;
	int rc;

	inode = new_inode(sb);
	if (!inode) {
		jERROR(1, ("ialloc: new_inode returned NULL!\n"));
		return inode;
	}

	rc = alloc_jfs_inode(inode);
	if (rc) {
		make_bad_inode(inode);
		iput(inode);
		return NULL;
	}
	jfs_inode = JFS_IP(inode);

	rc = diAlloc(parent, S_ISDIR(mode), inode);
	if (rc) {
		jERROR(1, ("ialloc: diAlloc returned %d!\n", rc));
		free_jfs_inode(inode);
		make_bad_inode(inode);
		iput(inode);
		return NULL;
	}

	inode->i_uid = current->fsuid;
	if (parent->i_mode & S_ISGID) {
		inode->i_gid = parent->i_gid;
		if (S_ISDIR(mode))
			mode |= S_ISGID;
	} else
		inode->i_gid = current->fsgid;

	inode->i_mode = mode;
	if (S_ISDIR(mode))
		jfs_inode->mode2 = IDIRECTORY | mode;
	else
		jfs_inode->mode2 = INLINEEA | ISPARSE | mode;
	inode->i_blksize = sb->s_blocksize;
	inode->i_blocks = 0;
	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
	jfs_inode->otime = inode->i_ctime;
	inode->i_generation = JFS_SBI(sb)->gengen++;

	jfs_inode->cflag = 0;
	set_cflag(COMMIT_New, inode);

	/* Zero remaining fields */
	memset(&jfs_inode->acl, 0, sizeof(dxd_t));
	memset(&jfs_inode->ea, 0, sizeof(dxd_t));
	jfs_inode->next_index = 0;
	jfs_inode->acltype = 0;
	jfs_inode->btorder = 0;
	jfs_inode->btindex = 0;
	jfs_inode->bxflag = 0;
	jfs_inode->blid = 0;
	jfs_inode->atlhead = 0;
	jfs_inode->atltail = 0;
	jfs_inode->xtlid = 0;

	jFYI(1, ("ialloc returns inode = 0x%p\n", inode));

	return inode;
}
Beispiel #5
0
int jfs_symlink(struct inode *dip, struct dentry *dentry, const char *name)
{
	int rc;
	tid_t tid;
	ino_t ino = 0;
	struct component_name dname;
	int ssize;		/* source pathname size */
	struct btstack btstack;
	struct inode *ip = dentry->d_inode;
	unchar *i_fastsymlink;
	s64 xlen = 0;
	int bmask = 0, xsize;
	s64 xaddr;
	struct metapage *mp;
	struct super_block *sb;
	struct tblock *tblk;

	struct inode *iplist[2];

	jFYI(1, ("jfs_symlink: dip:0x%p name:%s\n", dip, name));

	ssize = strlen(name) + 1;

	/*
	 * search parent directory for entry/freespace
	 * (dtSearch() returns parent directory page pinned)
	 */

	if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
		goto out1;

	/*
	 * allocate on-disk/in-memory inode for symbolic link:
	 * (iAlloc() returns new, locked inode)
	 */
	ip = ialloc(dip, S_IFLNK | 0777);
	if (ip == NULL) {
		rc = ENOSPC;
		goto out2;
	}

	tid = txBegin(dip->i_sb, 0);

	down(&JFS_IP(dip)->commit_sem);
	down(&JFS_IP(ip)->commit_sem);

	if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE)))
		goto out3;

	tblk = tid_to_tblock(tid);
	tblk->xflag |= COMMIT_CREATE;
	tblk->ip = ip;

	/*
	 * create entry for symbolic link in parent directory
	 */

	ino = ip->i_ino;



	if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
		jERROR(1, ("jfs_symlink: dtInsert returned %d\n", rc));
		/* discard ne inode */
		goto out3;

	}

	/* fix symlink access permission
	 * (dir_create() ANDs in the u.u_cmask, 
	 * but symlinks really need to be 777 access)
	 */
	ip->i_mode |= 0777;

	/*
	   *       write symbolic link target path name
	 */
	xtInitRoot(tid, ip);

	/*
	 * write source path name inline in on-disk inode (fast symbolic link)
	 */

	if (ssize <= IDATASIZE) {
		ip->i_op = &jfs_symlink_inode_operations;

		i_fastsymlink = JFS_IP(ip)->i_inline;
		memcpy(i_fastsymlink, name, ssize);
		ip->i_size = ssize - 1;

		/*
		 * if symlink is > 128 bytes, we don't have the space to
		 * store inline extended attributes
		 */
		if (ssize > sizeof (JFS_IP(ip)->i_inline))
			JFS_IP(ip)->mode2 &= ~INLINEEA;

		jFYI(1,
		     ("jfs_symlink: fast symlink added  ssize:%d name:%s \n",
		      ssize, name));
	}
	/*
	 * write source path name in a single extent
	 */
	else {
		jFYI(1, ("jfs_symlink: allocate extent ip:0x%p\n", ip));

		ip->i_op = &page_symlink_inode_operations;
		ip->i_mapping->a_ops = &jfs_aops;

		/*
		 * even though the data of symlink object (source 
		 * path name) is treated as non-journaled user data,
		 * it is read/written thru buffer cache for performance.
		 */
		sb = ip->i_sb;
		bmask = JFS_SBI(sb)->bsize - 1;
		xsize = (ssize + bmask) & ~bmask;
		xaddr = 0;
		xlen = xsize >> JFS_SBI(sb)->l2bsize;
		if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0)) == 0) {
			ip->i_size = ssize - 1;
			while (ssize) {
				int copy_size = min(ssize, PSIZE);

				mp = get_metapage(ip, xaddr, PSIZE, 1);

				if (mp == NULL) {
					dtDelete(tid, dip, &dname, &ino,
						 JFS_REMOVE);
					rc = EIO;
					goto out3;
				}
				memcpy(mp->data, name, copy_size);
				flush_metapage(mp);
#if 0
				mark_buffer_uptodate(bp, 1);
				mark_buffer_dirty(bp, 1);
				if (IS_SYNC(dip)) {
					ll_rw_block(WRITE, 1, &bp);
					wait_on_buffer(bp);
				}
				brelse(bp);
#endif				/* 0 */
				ssize -= copy_size;
				xaddr += JFS_SBI(sb)->nbperpage;
			}
			ip->i_blocks = LBLK2PBLK(sb, xlen);
		} else {
			dtDelete(tid, dip, &dname, &ino, JFS_REMOVE);
			rc = ENOSPC;
			goto out3;
		}
	}

	insert_inode_hash(ip);
	mark_inode_dirty(ip);
	d_instantiate(dentry, ip);

	/*
	 * commit update of parent directory and link object
	 *
	 * if extent allocation failed (ENOSPC),
	 * the parent inode is committed regardless to avoid
	 * backing out parent directory update (by dtInsert())
	 * and subsequent dtDelete() which is harmless wrt 
	 * integrity concern.  
	 * the symlink inode will be freed by iput() at exit
	 * as it has a zero link count (by dtDelete()) and 
	 * no permanant resources. 
	 */

	iplist[0] = dip;
	if (rc == 0) {
		iplist[1] = ip;
		rc = txCommit(tid, 2, &iplist[0], 0);
	} else
		rc = txCommit(tid, 1, &iplist[0], 0);

      out3:
	txEnd(tid);
	up(&JFS_IP(dip)->commit_sem);
	up(&JFS_IP(ip)->commit_sem);
	if (rc) {
		ip->i_nlink = 0;
		iput(ip);
	}

      out2:
	free_UCSname(&dname);

      out1:
	jFYI(1, ("jfs_symlink: rc:%d\n", -rc));
	return -rc;
}
Beispiel #6
0
/*
 * NAME:	jfs_create(dip, dentry, mode)
 *
 * FUNCTION:	create a regular file in the parent directory <dip>
 *		with name = <from dentry> and mode = <mode>
 *
 * PARAMETER:	dip 	- parent directory vnode
 *		dentry	- dentry of new file
 *		mode	- create mode (rwxrwxrwx).
 *
 * RETURN:	Errors from subroutines
 *
 */
int jfs_create(struct inode *dip, struct dentry *dentry, int mode)
{
	int rc = 0;
	tid_t tid;		/* transaction id */
	struct inode *ip = NULL;	/* child directory inode */
	ino_t ino;
	struct component_name dname;	/* child directory name */
	struct btstack btstack;
	struct inode *iplist[2];
	struct tblock *tblk;

	jFYI(1, ("jfs_create: dip:0x%p name:%s\n", dip, dentry->d_name.name));

	/*
	 * search parent directory for entry/freespace
	 * (dtSearch() returns parent directory page pinned)
	 */
	if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
		goto out1;

	/*
	 * Either iAlloc() or txBegin() may block.  Deadlock can occur if we
	 * block there while holding dtree page, so we allocate the inode &
	 * begin the transaction before we search the directory.
	 */
	ip = ialloc(dip, mode);
	if (ip == NULL) {
		rc = ENOSPC;
		goto out2;
	}

	tid = txBegin(dip->i_sb, 0);

	down(&JFS_IP(dip)->commit_sem);
	down(&JFS_IP(ip)->commit_sem);

	if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) {
		jERROR(1, ("jfs_create: dtSearch returned %d\n", rc));
		goto out3;
	}

	tblk = tid_to_tblock(tid);
	tblk->xflag |= COMMIT_CREATE;
	tblk->ip = ip;

	iplist[0] = dip;
	iplist[1] = ip;

	/*
	 * initialize the child XAD tree root in-line in inode
	 */
	xtInitRoot(tid, ip);

	/*
	 * create entry in parent directory for child directory
	 * (dtInsert() releases parent directory page)
	 */
	ino = ip->i_ino;
	if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
		jERROR(1, ("jfs_create: dtInsert returned %d\n", rc));
		if (rc == EIO)
			txAbort(tid, 1);	/* Marks Filesystem dirty */
		else
			txAbort(tid, 0);	/* Filesystem full */
		goto out3;
	}

	ip->i_op = &jfs_file_inode_operations;
	ip->i_fop = &jfs_file_operations;
	ip->i_mapping->a_ops = &jfs_aops;

	insert_inode_hash(ip);
	mark_inode_dirty(ip);
	d_instantiate(dentry, ip);

	dip->i_ctime = dip->i_mtime = CURRENT_TIME;

	mark_inode_dirty(dip);

	rc = txCommit(tid, 2, &iplist[0], 0);

      out3:
	txEnd(tid);
	up(&JFS_IP(dip)->commit_sem);
	up(&JFS_IP(ip)->commit_sem);
	if (rc) {
		ip->i_nlink = 0;
		iput(ip);
	}

      out2:
	free_UCSname(&dname);

      out1:

	jFYI(1, ("jfs_create: rc:%d\n", -rc));
	return -rc;
}
Beispiel #7
0
/*
 * NAME:	jfs_unlink(dip, dentry)
 *
 * FUNCTION:	remove a link to object <vp> named by <name> 
 *		from parent directory <dvp>
 *
 * PARAMETER:	dip 	- inode of parent directory
 *		dentry 	- dentry of object to be removed
 *
 * RETURN:	errors from subroutines
 *
 * note:
 * temporary file: if one or more processes have the file open
 * when the last link is removed, the link will be removed before
 * unlink() returns, but the removal of the file contents will be
 * postponed until all references to the files are closed.
 *
 * JFS does NOT support unlink() on directories.
 *
 */
int jfs_unlink(struct inode *dip, struct dentry *dentry)
{
	int rc;
	tid_t tid;		/* transaction id */
	struct inode *ip = dentry->d_inode;
	ino_t ino;
	struct component_name dname;	/* object name */
	struct inode *iplist[2];
	struct tblock *tblk;
	s64 new_size = 0;
	int commit_flag;

	jFYI(1, ("jfs_unlink: dip:0x%p name:%s\n", dip, dentry->d_name.name));

	if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab)))
		goto out;

	IWRITE_LOCK(ip);

	tid = txBegin(dip->i_sb, 0);

	down(&JFS_IP(dip)->commit_sem);
	down(&JFS_IP(ip)->commit_sem);

	iplist[0] = dip;
	iplist[1] = ip;

	/*
	 * delete the entry of target file from parent directory
	 */
	ino = ip->i_ino;
	if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
		jERROR(1, ("jfs_unlink: dtDelete returned %d\n", rc));
		if (rc == EIO)
			txAbort(tid, 1);	/* Marks FS Dirty */
		txEnd(tid);
		up(&JFS_IP(dip)->commit_sem);
		up(&JFS_IP(ip)->commit_sem);
		IWRITE_UNLOCK(ip);
		goto out1;
	}

	ASSERT(ip->i_nlink);

	ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME;
	mark_inode_dirty(dip);

	/* update target's inode */
	ip->i_nlink--;
	mark_inode_dirty(ip);

	/*
	 *      commit zero link count object
	 */
	if (ip->i_nlink == 0) {
		assert(!test_cflag(COMMIT_Nolink, ip));
		/* free block resources */
		if ((new_size = commitZeroLink(tid, ip)) < 0) {
			txAbort(tid, 1);	/* Marks FS Dirty */
			txEnd(tid);
			up(&JFS_IP(dip)->commit_sem);
			up(&JFS_IP(ip)->commit_sem);
			IWRITE_UNLOCK(ip);
			rc = -new_size;		/* We return -rc */
			goto out1;
		}
		tblk = tid_to_tblock(tid);
		tblk->xflag |= COMMIT_DELETE;
		tblk->ip = ip;
	}

	/*
	 * Incomplete truncate of file data can
	 * result in timing problems unless we synchronously commit the
	 * transaction.
	 */
	if (new_size)
		commit_flag = COMMIT_SYNC;
	else
		commit_flag = 0;

	/*
	 * If xtTruncate was incomplete, commit synchronously to avoid
	 * timing complications
	 */
	rc = txCommit(tid, 2, &iplist[0], commit_flag);

	txEnd(tid);

	up(&JFS_IP(dip)->commit_sem);
	up(&JFS_IP(ip)->commit_sem);


	while (new_size && (rc == 0)) {
		tid = txBegin(dip->i_sb, 0);
		down(&JFS_IP(ip)->commit_sem);
		new_size = xtTruncate_pmap(tid, ip, new_size);
		if (new_size < 0) {
			txAbort(tid, 1);	/* Marks FS Dirty */
			rc = -new_size;		/* We return -rc */
		} else
			rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC);
		txEnd(tid);
		up(&JFS_IP(ip)->commit_sem);
	}

	if (ip->i_nlink == 0)
		set_cflag(COMMIT_Nolink, ip);

	if (!test_cflag(COMMIT_Holdlock, ip))
		IWRITE_UNLOCK(ip);

	/*
	 * Truncating the directory index table is not guaranteed.  It
	 * may need to be done iteratively
	 */
	if (test_cflag(COMMIT_Stale, dip)) {
		if (dip->i_size > 1)
			jfs_truncate_nolock(dip, 0);

		clear_cflag(COMMIT_Stale, dip);
	}

      out1:
	free_UCSname(&dname);
      out:
	jFYI(1, ("jfs_unlink: rc:%d\n", -rc));
	return -rc;
}
Beispiel #8
0
/*
 * NAME:	jfs_rmdir(dip, dentry)
 *
 * FUNCTION:	remove a link to child directory
 *
 * PARAMETER:	dip 	- parent inode
 *		dentry	- child directory dentry
 *
 * RETURN:	EINVAL	- if name is . or ..
 *		EINVAL  - if . or .. exist but are invalid.
 *		errors from subroutines
 *
 * note:
 * if other threads have the directory open when the last link 
 * is removed, the "." and ".." entries, if present, are removed before 
 * rmdir() returns and no new entries may be created in the directory, 
 * but the directory is not removed until the last reference to 
 * the directory is released (cf.unlink() of regular file).
 */
int jfs_rmdir(struct inode *dip, struct dentry *dentry)
{
	int rc;
	tid_t tid;		/* transaction id */
	struct inode *ip = dentry->d_inode;
	ino_t ino;
	struct component_name dname;
	struct inode *iplist[2];
	struct tblock *tblk;

	jFYI(1, ("jfs_rmdir: dip:0x%p name:%s\n", dip, dentry->d_name.name));

	/* directory must be empty to be removed */
	if (!dtEmpty(ip)) {
		rc = ENOTEMPTY;
		goto out;
	}

	if ((rc = get_UCSname(&dname, dentry, JFS_SBI(dip->i_sb)->nls_tab))) {
		goto out;
	}

	tid = txBegin(dip->i_sb, 0);

	down(&JFS_IP(dip)->commit_sem);
	down(&JFS_IP(ip)->commit_sem);

	iplist[0] = dip;
	iplist[1] = ip;

	tblk = tid_to_tblock(tid);
	tblk->xflag |= COMMIT_DELETE;
	tblk->ip = ip;

	/*
	 * delete the entry of target directory from parent directory
	 */
	ino = ip->i_ino;
	if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
		jERROR(1, ("jfs_rmdir: dtDelete returned %d\n", rc));
		if (rc == EIO)
			txAbort(tid, 1);
		txEnd(tid);
		up(&JFS_IP(dip)->commit_sem);
		up(&JFS_IP(ip)->commit_sem);

		goto out2;
	}

	/* update parent directory's link count corresponding
	 * to ".." entry of the target directory deleted
	 */
	dip->i_nlink--;
	dip->i_ctime = dip->i_mtime = CURRENT_TIME;
	mark_inode_dirty(dip);

	/*
	 * OS/2 could have created EA and/or ACL
	 */
	/* free EA from both persistent and working map */
	if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
		/* free EA pages */
		txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
	}
	JFS_IP(ip)->ea.flag = 0;

	/* free ACL from both persistent and working map */
	if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
		/* free ACL pages */
		txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
	}
	JFS_IP(ip)->acl.flag = 0;

	/* mark the target directory as deleted */
	ip->i_nlink = 0;
	mark_inode_dirty(ip);

	rc = txCommit(tid, 2, &iplist[0], 0);

	txEnd(tid);

	up(&JFS_IP(dip)->commit_sem);
	up(&JFS_IP(ip)->commit_sem);

	/*
	 * Truncating the directory index table is not guaranteed.  It
	 * may need to be done iteratively
	 */
	if (test_cflag(COMMIT_Stale, dip)) {
		if (dip->i_size > 1)
			jfs_truncate_nolock(dip, 0);

		clear_cflag(COMMIT_Stale, dip);
	}

      out2:
	free_UCSname(&dname);

      out:
	jFYI(1, ("jfs_rmdir: rc:%d\n", rc));
	return -rc;
}
Beispiel #9
0
/*
 * NAME:        jfs_rename
 *
 * FUNCTION:    rename a file or directory
 */
int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
	       struct inode *new_dir, struct dentry *new_dentry)
{
	struct btstack btstack;
	ino_t ino;
	struct component_name new_dname;
	struct inode *new_ip;
	struct component_name old_dname;
	struct inode *old_ip;
	int rc;
	tid_t tid;
	struct tlock *tlck;
	struct dt_lock *dtlck;
	struct lv *lv;
	int ipcount;
	struct inode *iplist[4];
	struct tblock *tblk;
	s64 new_size = 0;
	int commit_flag;


	jFYI(1,
	     ("jfs_rename: %s %s\n", old_dentry->d_name.name,
	      new_dentry->d_name.name));

	old_ip = old_dentry->d_inode;
	new_ip = new_dentry->d_inode;

	if ((rc = get_UCSname(&old_dname, old_dentry,
			      JFS_SBI(old_dir->i_sb)->nls_tab)))
		goto out1;

	if ((rc = get_UCSname(&new_dname, new_dentry,
			      JFS_SBI(old_dir->i_sb)->nls_tab)))
		goto out2;

	/*
	 * Make sure source inode number is what we think it is
	 */
	rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP);
	if (rc || (ino != old_ip->i_ino)) {
		rc = ENOENT;
		goto out3;
	}

	/*
	 * Make sure dest inode number (if any) is what we think it is
	 */
	rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP);
	if (rc == 0) {
		if ((new_ip == 0) || (ino != new_ip->i_ino)) {
			rc = ESTALE;
			goto out3;
		}
	} else if (rc != ENOENT)
		goto out3;
	else if (new_ip) {
		/* no entry exists, but one was expected */
		rc = ESTALE;
		goto out3;
	}

	if (S_ISDIR(old_ip->i_mode)) {
		if (new_ip) {
			if (!dtEmpty(new_ip)) {
				rc = ENOTEMPTY;
				goto out3;
			}
		} else if ((new_dir != old_dir) &&
			   (new_dir->i_nlink == JFS_LINK_MAX)) {
			rc = EMLINK;
			goto out3;
		}
	} else if (new_ip)
		IWRITE_LOCK(new_ip);

	/*
	 * The real work starts here
	 */
	tid = txBegin(new_dir->i_sb, 0);

	down(&JFS_IP(new_dir)->commit_sem);
	down(&JFS_IP(old_ip)->commit_sem);
	if (old_dir != new_dir)
		down(&JFS_IP(old_dir)->commit_sem);

	if (new_ip) {
		down(&JFS_IP(new_ip)->commit_sem);
		/*
		 * Change existing directory entry to new inode number
		 */
		ino = new_ip->i_ino;
		rc = dtModify(tid, new_dir, &new_dname, &ino,
			      old_ip->i_ino, JFS_RENAME);
		if (rc)
			goto out4;
		new_ip->i_nlink--;
		if (S_ISDIR(new_ip->i_mode)) {
			new_ip->i_nlink--;
			assert(new_ip->i_nlink == 0);
			tblk = tid_to_tblock(tid);
			tblk->xflag |= COMMIT_DELETE;
			tblk->ip = new_ip;
		} else if (new_ip->i_nlink == 0) {
			assert(!test_cflag(COMMIT_Nolink, new_ip));
			/* free block resources */
			if ((new_size = commitZeroLink(tid, new_ip)) < 0) {
				txAbort(tid, 1);	/* Marks FS Dirty */
				rc = -new_size;		/* We return -rc */
				goto out4;
			}
			tblk = tid_to_tblock(tid);
			tblk->xflag |= COMMIT_DELETE;
			tblk->ip = new_ip;
		} else {
			new_ip->i_ctime = CURRENT_TIME;
			mark_inode_dirty(new_ip);
		}
	} else {
		/*
		 * Add new directory entry
		 */
		rc = dtSearch(new_dir, &new_dname, &ino, &btstack,
			      JFS_CREATE);
		if (rc) {
			jERROR(1,
			       ("jfs_rename didn't expect dtSearch to fail w/rc = %d\n",
				rc));
			goto out4;
		}

		ino = old_ip->i_ino;
		rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack);
		if (rc) {
			jERROR(1,
			       ("jfs_rename: dtInsert failed w/rc = %d\n",
				rc));
			goto out4;
		}
		if (S_ISDIR(old_ip->i_mode))
			new_dir->i_nlink++;
	}
	/*
	 * Remove old directory entry
	 */

	ino = old_ip->i_ino;
	rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE);
	if (rc) {
		jERROR(1,
		       ("jfs_rename did not expect dtDelete to return rc = %d\n",
			rc));
		txAbort(tid, 1);	/* Marks Filesystem dirty */
		goto out4;
	}
	if (S_ISDIR(old_ip->i_mode)) {
		old_dir->i_nlink--;
		if (old_dir != new_dir) {
			/*
			 * Change inode number of parent for moved directory
			 */

			JFS_IP(old_ip)->i_dtroot.header.idotdot =
				cpu_to_le32(new_dir->i_ino);

			/* Linelock header of dtree */
			tlck = txLock(tid, old_ip,
				    (struct metapage *) &JFS_IP(old_ip)->bxflag,
				      tlckDTREE | tlckBTROOT);
			dtlck = (struct dt_lock *) & tlck->lock;
			ASSERT(dtlck->index == 0);
			lv = & dtlck->lv[0];
			lv->offset = 0;
			lv->length = 1;
			dtlck->index++;
		}
	}

	/*
	 * Update ctime on changed/moved inodes & mark dirty
	 */
	old_ip->i_ctime = CURRENT_TIME;
	mark_inode_dirty(old_ip);

	new_dir->i_ctime = CURRENT_TIME;
	mark_inode_dirty(new_dir);

	/* Build list of inodes modified by this transaction */
	ipcount = 0;
	iplist[ipcount++] = old_ip;
	if (new_ip)
		iplist[ipcount++] = new_ip;
	iplist[ipcount++] = old_dir;

	if (old_dir != new_dir) {
		iplist[ipcount++] = new_dir;
		old_dir->i_ctime = CURRENT_TIME;
		mark_inode_dirty(old_dir);
	}

	/*
	 * Incomplete truncate of file data can
	 * result in timing problems unless we synchronously commit the
	 * transaction.
	 */
	if (new_size)
		commit_flag = COMMIT_SYNC;
	else
		commit_flag = 0;

	rc = txCommit(tid, ipcount, iplist, commit_flag);

	/*
	 * Don't unlock new_ip if COMMIT_HOLDLOCK is set
	 */
	if (new_ip && test_cflag(COMMIT_Holdlock, new_ip)) {
		up(&JFS_IP(new_ip)->commit_sem);
		new_ip = 0;
	}

      out4:
	txEnd(tid);

	up(&JFS_IP(new_dir)->commit_sem);
	up(&JFS_IP(old_ip)->commit_sem);
	if (old_dir != new_dir)
		up(&JFS_IP(old_dir)->commit_sem);
	if (new_ip)
		up(&JFS_IP(new_ip)->commit_sem);

	while (new_size && (rc == 0)) {
		tid = txBegin(new_ip->i_sb, 0);
		down(&JFS_IP(new_ip)->commit_sem);
		new_size = xtTruncate_pmap(tid, new_ip, new_size);
		if (new_size < 0) {
			txAbort(tid, 1);
			rc = -new_size;		/* We return -rc */
		} else
			rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC);
		txEnd(tid);
		up(&JFS_IP(new_ip)->commit_sem);
	}
	if (new_ip && (new_ip->i_nlink == 0))
		set_cflag(COMMIT_Nolink, new_ip);
      out3:
	free_UCSname(&new_dname);
      out2:
	free_UCSname(&old_dname);
      out1:
	if (new_ip && !S_ISDIR(new_ip->i_mode))
		IWRITE_UNLOCK(new_ip);
	/*
	 * Truncating the directory index table is not guaranteed.  It
	 * may need to be done iteratively
	 */
	if (test_cflag(COMMIT_Stale, old_dir)) {
		if (old_dir->i_size > 1)
			jfs_truncate_nolock(old_dir, 0);

		clear_cflag(COMMIT_Stale, old_dir);
	}

	jFYI(1, ("jfs_rename: returning %d\n", rc));
	return -rc;
}