48  *   | Overall EA | First FEA Element | Second FEA Element | .....
55  *	written directly. An EA list may be in-lined in the inode if there is
62 	dxd_t new_ea;		/* dxd to replace ea when modifying xattr */
63 	struct metapage *mp;	/* metapage containing ea list */
64 	struct jfs_ea_list *xattr;	/* buffer containing ea list */
95 static inline int name_size(struct jfs_ea *ea)  in name_size()  argument
97 	if (is_known_namespace(ea->name))  in name_size()
98 		return ea->namelen;  in name_size()
100 		return ea->namelen + XATTR_OS2_PREFIX_LEN;  in name_size()
103 static inline int copy_name(char *buffer, struct jfs_ea *ea)  in copy_name()  argument
105 	int len = ea->namelen;  in copy_name()
107 	if (!is_known_namespace(ea->name)) {  in copy_name()
112 	memcpy(buffer, ea->name, ea->namelen);  in copy_name()
113 	buffer[ea->namelen] = 0;  in copy_name()
124  * FUNCTION: Attempt to write an EA inline if area is available
127  *	Already verified that the specified EA is small enough to fit inline
131  *	ealist	- EA list pointer
133  *	ea	- dxd_t structure to be filled in with necessary EA information
134  *		  if we successfully copy the EA inline
137  *	Checks if the inode's inline area is available.  If so, copies EA inline
138  *	and sets <ea> fields appropriately.  Otherwise, returns failure, EA will
144 			   int size, dxd_t * ea)  in ea_write_inline()  argument
149 	 * Make sure we have an EA -- the NULL EA list is valid, but you  in ea_write_inline()
157 		 * used for an inline EA.  in ea_write_inline()
159 		if (!(ji->mode2 & INLINEEA) && !(ji->ea.flag & DXD_INLINE))  in ea_write_inline()
162 		DXDsize(ea, size);  in ea_write_inline()
163 		DXDlength(ea, 0);  in ea_write_inline()
164 		DXDaddress(ea, 0);  in ea_write_inline()
166 		ea->flag = DXD_INLINE;  in ea_write_inline()
169 		ea->flag = 0;  in ea_write_inline()
170 		DXDsize(ea, 0);  in ea_write_inline()
171 		DXDlength(ea, 0);  in ea_write_inline()
172 		DXDaddress(ea, 0);  in ea_write_inline()
175 		if (ji->ea.flag & DXD_INLINE)  in ea_write_inline()
185  * FUNCTION: Write an EA for an inode
187  * PRE CONDITIONS: EA has been verified
191  *	ealist	- EA list pointer
193  *	ea	- dxd_t structure to be filled in appropriately with where the
194  *		  EA was copied
196  * NOTES: Will write EA inline if able to, otherwise allocates blocks for an
202 		       dxd_t * ea)  in ea_write()  argument
216 	 * Quick check to see if this is an in-linable EA.  Short EAs  in ea_write()
220 		if (!ea_write_inline(ip, ealist, size, ea))  in ea_write()
287 	ea->flag = DXD_EXTENT;  in ea_write()
288 	DXDsize(ea, le32_to_cpu(ealist->size));  in ea_write()
289 	DXDlength(ea, nblocks);  in ea_write()
290 	DXDaddress(ea, blkno);  in ea_write()
293 	if (ji->ea.flag & DXD_INLINE)  in ea_write()
309  * FUNCTION: Read an inlined EA into user's buffer
313  *	ealist	- Pointer to buffer to fill in with EA
320 	int ea_size = sizeDXD(&ji->ea);  in ea_read_inline()
328 	if ((sizeDXD(&ji->ea) > sizeof (ji->i_inline_ea)))  in ea_read_inline()
341  * FUNCTION: copy EA data into user's buffer
345  *	ealist	- Pointer to buffer to fill in with EA
347  * NOTES:  If EA is inline calls ea_read_inline() to copy EA.
364 	/* quick check for in-line EA */  in ea_read()
365 	if (ji->ea.flag & DXD_INLINE)  in ea_read()
368 	nbytes = sizeDXD(&ji->ea);  in ea_read()
375 	 * Figure out how many blocks were allocated when this EA list was  in ea_read()
378 	nblocks = lengthDXD(&ji->ea) << sbi->l2nbperpage;  in ea_read()
379 	blkno = addressDXD(&ji->ea) << sbi->l2nbperpage;  in ea_read()
431 	int ea_size = sizeDXD(&ji->ea);  in ea_get()
437 	/* When fsck.jfs clears a bad ea, it doesn't clear the size */  in ea_get()
438 	if (ji->ea.flag == 0)  in ea_get()
460 	} else if (ji->ea.flag & DXD_INLINE) {  in ea_get()
469 		if (!(ji->ea.flag & DXD_EXTENT)) {  in ea_get()
470 			jfs_error(sb, "invalid ea.flag\n");  in ea_get()
547 	ea_buf->mp = read_metapage(inode, addressDXD(&ji->ea),  in ea_get()
548 				   lengthDXD(&ji->ea) << sb->s_blocksize_bits,  in ea_get()
616 		/* ->xattr must point to original ea's metapage */  in ea_put()
625 	if (ji->ea.flag & DXD_EXTENT) {  in ea_put()
626 		invalidate_dxd_metapages(inode, ji->ea);  in ea_put()
627 		old_blocks = lengthDXD(&ji->ea);  in ea_put()
631 		txEA(tid, inode, &ji->ea, &ea_buf->new_ea);  in ea_put()
634 			if (ji->ea.flag & DXD_INLINE)  in ea_put()
637 		ji->ea = ea_buf->new_ea;  in ea_put()
639 		txEA(tid, inode, &ji->ea, NULL);  in ea_put()
640 		if (ji->ea.flag & DXD_INLINE)  in ea_put()
642 		ji->ea.flag = 0;  in ea_put()
643 		ji->ea.size = 0;  in ea_put()
659 	struct jfs_ea *ea, *old_ea = NULL, *next_ea = NULL;  in __jfs_setxattr()  local
682 		for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist);  in __jfs_setxattr()
683 		     ea = NEXT_EA(ea)) {  in __jfs_setxattr()
684 			if ((namelen == ea->namelen) &&  in __jfs_setxattr()
685 			    (memcmp(name, ea->name, namelen) == 0)) {  in __jfs_setxattr()
691 				old_ea = ea;  in __jfs_setxattr()
692 				old_ea_size = EA_SIZE(ea);  in __jfs_setxattr()
693 				next_ea = NEXT_EA(ea);  in __jfs_setxattr()
695 				new_size += EA_SIZE(ea);  in __jfs_setxattr()
714 		 * We need to allocate more space for merged ea list.  in __jfs_setxattr()
726 	/* Remove old ea of the same name */  in __jfs_setxattr()
728 		/* number of bytes following target EA */  in __jfs_setxattr()
738 			/* Completely new ea list */  in __jfs_setxattr()
742 		 * The size of EA value is limitted by on-disk format up to  in __jfs_setxattr()
754 		ea = (struct jfs_ea *) ((char *) ealist + xattr_size);  in __jfs_setxattr()
755 		ea->flag = 0;  in __jfs_setxattr()
756 		ea->namelen = namelen;  in __jfs_setxattr()
757 		ea->valuelen = (cpu_to_le16(value_len));  in __jfs_setxattr()
758 		memcpy(ea->name, name, namelen);  in __jfs_setxattr()
759 		ea->name[namelen] = 0;  in __jfs_setxattr()
761 			memcpy(&ea->name[namelen + 1], value, value_len);  in __jfs_setxattr()
762 		xattr_size += EA_SIZE(ea);  in __jfs_setxattr()
776 	 * If we're left with an empty list, there's no ea  in __jfs_setxattr()
798 	struct jfs_ea *ea;  in __jfs_getxattr()  local
820 	for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); ea = NEXT_EA(ea))  in __jfs_getxattr()
821 		if ((namelen == ea->namelen) &&  in __jfs_getxattr()
822 		    memcmp(name, ea->name, namelen) == 0) {  in __jfs_getxattr()
824 			size = le16_to_cpu(ea->valuelen);  in __jfs_getxattr()
831 			value = ((char *) &ea->name) + ea->namelen + 1;  in __jfs_getxattr()
848 static inline int can_list(struct jfs_ea *ea)  in can_list()  argument
850 	return (strncmp(ea->name, XATTR_TRUSTED_PREFIX,  in can_list()
862 	struct jfs_ea *ea;  in jfs_listxattr()  local
879 	for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); ea = NEXT_EA(ea)) {  in jfs_listxattr()
880 		if (can_list(ea))  in jfs_listxattr()
881 			size += name_size(ea) + 1;  in jfs_listxattr()
894 	for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); ea = NEXT_EA(ea)) {  in jfs_listxattr()
895 		if (can_list(ea)) {  in jfs_listxattr()
896 			int namelen = copy_name(buffer, ea);  in jfs_listxattr()