bsd/hfs/hfs_xattr.c

90 static int  remove_attribute_records(struct hfsmount *hfsmp, BTreeIterator * iterator);
92 static int  getnodecount(struct hfsmount *hfsmp, size_t nodesize);
96 static int  read_attr_data(struct hfsmount *hfsmp, uio_t uio, size_t datasize, HFSPlusExtentDescriptor *extents);
98 static int  write_attr_data(struct hfsmount *hfsmp, uio_t uio, size_t datasize, HFSPlusExtentDescriptor *extents);
100 static int  alloc_attr_blks(struct hfsmount *hfsmp, size_t attrsize, size_t extentbufsize, HFSPlusExtentDescriptor *extents, int *blocks);
102 static void  free_attr_blks(struct hfsmount *hfsmp, int blkcnt, HFSPlusExtentDescriptor *extents);
278 	struct hfsmount *hfsmp;
347 			hfsmp = VTOHFS(vp);
352 			result = hfs_vgetrsrc(hfsmp, vp, &rvp, TRUE, FALSE);
400 	hfsmp = VTOHFS(vp);
404 	if (hfsmp->hfs_flags & HFS_STANDARD) {
431  * We pass the hfsmp argument directly here because we may not necessarily have a cnode to
441 		struct hfsmount *hfsmp, u_int32_t fileid) {
463 	if ((hfsmp->hfs_attribute_vp == NULL) ||
470 	btfile = VTOF(hfsmp->hfs_attribute_vp);
499 	lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE, HFS_SHARED_LOCK);
501 	hfs_systemfile_unlock(hfsmp, lockflags);
589 				lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE, HFS_SHARED_LOCK);
608 				hfs_systemfile_unlock(hfsmp, lockflags);
614 					result = read_attr_data(hfsmp, uio, attrlen, extentbuf);
620 				result = read_attr_data(hfsmp, uio, recp->forkData.theFork.logicalSize, recp->forkData.theFork.extents);
662 	struct hfsmount *hfsmp;
672 	hfsmp = VTOHFS(vp);
834 		result = hfs_vgetrsrc(hfsmp, vp, &rvp, TRUE, FALSE);
870 	if (hfsmp->hfs_flags & HFS_STANDARD) {
885 	    hfsmp->hfs_max_inline_attrsize != 0 &&
886 	    attrsize < hfsmp->hfs_max_inline_attrsize) {
929  * See comments from hfs_getxattr_internal on why we need to pass 'hfsmp' and fileid here.
937  *			hfsmp->hfs_max_inline_attrsize bytes long.
940 						   struct vnop_setxattr_args *ap, struct hfsmount *hfsmp,
975 	if (hfs_start_transaction(hfsmp) != 0) {
993 	if (hfsmp->hfs_attribute_vp == NULL) {
994 		result = hfs_create_attr_btree(hfsmp, ATTRIBUTE_FILE_NODE_SIZE,
995 		                               getnodecount(hfsmp, ATTRIBUTE_FILE_NODE_SIZE));
1000 	if (hfsmp->hfs_max_inline_attrsize == 0) {
1001 		hfsmp->hfs_max_inline_attrsize = getmaxinlineattrsize(hfsmp->hfs_attribute_vp);
1006 		lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE, HFS_EXCLUSIVE_LOCK);
1022 	btfile = VTOF(hfsmp->hfs_attribute_vp);
1040 	if (attrsize > hfsmp->hfs_max_inline_attrsize) {
1058 		blkcnt = howmany(attrsize, hfsmp->blockSize);
1067 		result = alloc_attr_blks(hfsmp, attrsize, extentbufsize, extentptr, &allocatedblks);
1073 		result = write_attr_data(hfsmp, uio, attrsize, extentptr);
1087 			result = remove_attribute_records(hfsmp, iterator);
1153 			result = remove_attribute_records(hfsmp, iterator);
1205 		hfs_systemfile_unlock(hfsmp, lockflags);
1223 			free_attr_blks(hfsmp, allocatedblks, extentptr);
1225 		hfs_end_transaction(hfsmp);
1261 	struct hfsmount *hfsmp;
1270 	hfsmp = VTOHFS(vp);
1297 		result = hfs_vgetrsrc(hfsmp, vp, &rvp, TRUE, FALSE);
1313 		if ((result = hfs_start_transaction(hfsmp))) {
1327 		hfs_end_transaction(hfsmp);
1417 	if (hfsmp->hfs_flags & HFS_STANDARD) {
1420 	if (hfsmp->hfs_attribute_vp == NULL) {
1439 	if (hfs_start_transaction(hfsmp) != 0) {
1443 	lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE | SFL_BITMAP, HFS_EXCLUSIVE_LOCK);
1445 	result = remove_attribute_records(hfsmp, iterator);
1447 	hfs_systemfile_unlock(hfsmp, lockflags);
1452 		lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE, HFS_SHARED_LOCK);
1455 		result = file_attribute_exist(hfsmp, cp->c_fileid);
1463 		hfs_systemfile_unlock(hfsmp, lockflags);
1472 	hfs_end_transaction(hfsmp);
1493 file_attribute_exist(struct hfsmount *hfsmp, uint32_t fileID)
1502 	if (hfsmp->hfs_attribute_vp == NULL) {
1519 	btfile = VTOF(hfsmp->hfs_attribute_vp);
1553 remove_attribute_records(struct hfsmount *hfsmp, BTreeIterator * iterator)
1561 	btfile = VTOF(hfsmp->hfs_attribute_vp);
1591 			free_attr_blks(hfsmp, extentblks, attrdata.forkData.theFork.extents);
1614 				free_attr_blks(hfsmp, extentblks, attrdata.overflowExtents.extents);
1644 	struct hfsmount *hfsmp;
1664 	hfsmp = VTOHFS(vp);
1729 	if (hfsmp->hfs_flags & HFS_STANDARD) {
1734 	if ((hfsmp->hfs_attribute_vp == NULL) ||
1739 	btfile = VTOF(hfsmp->hfs_attribute_vp);
1764 	lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE, HFS_SHARED_LOCK);
1768 		hfs_systemfile_unlock(hfsmp, lockflags);
1787 	hfs_systemfile_unlock(hfsmp, lockflags);
1873 hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid)
1880 	if (hfsmp->hfs_attribute_vp == NULL) {
1883 	btfile = VTOF(hfsmp->hfs_attribute_vp);
1894 		if (hfs_start_transaction(hfsmp) != 0) {
1900 		lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE | SFL_BITMAP, HFS_EXCLUSIVE_LOCK);
1908 			hfs_systemfile_unlock(hfsmp, lockflags);
1909 			hfs_end_transaction(hfsmp);
1912 		result = remove_attribute_records(hfsmp, iterator);
1919 		hfs_systemfile_unlock(hfsmp, lockflags);
1920 		hfs_end_transaction(hfsmp);
1931 hfs_xattr_init(struct hfsmount * hfsmp)
1936 	if (!(hfsmp->hfs_flags & HFS_STANDARD) &&
1937 	    (hfsmp->hfs_attribute_vp == NULL) &&
1938 	    !(hfsmp->hfs_flags & HFS_READ_ONLY)) {
1939 		(void) hfs_create_attr_btree(hfsmp, ATTRIBUTE_FILE_NODE_SIZE,
1940 		                             getnodecount(hfsmp, ATTRIBUTE_FILE_NODE_SIZE));
1942 	if (hfsmp->hfs_attribute_vp)
1943 		hfsmp->hfs_max_inline_attrsize = getmaxinlineattrsize(hfsmp->hfs_attribute_vp);
1952 hfs_set_volxattr(struct hfsmount *hfsmp, unsigned int xattrtype, int state)
1959 	if (hfsmp->hfs_flags & HFS_STANDARD) {
1969 	if (hfsmp->hfs_attribute_vp == NULL) {
1970 		result = hfs_create_attr_btree(hfsmp, ATTRIBUTE_FILE_NODE_SIZE,
1971 		                               getnodecount(hfsmp, ATTRIBUTE_FILE_NODE_SIZE));
1991 	if (hfs_start_transaction(hfsmp) != 0) {
1995 	btfile = VTOF(hfsmp->hfs_attribute_vp);
1997 	lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE, HFS_EXCLUSIVE_LOCK);
2027 	hfs_systemfile_unlock(hfsmp, lockflags);
2030 	hfs_end_transaction(hfsmp);
2033 	HFS_MOUNT_LOCK(hfsmp, TRUE);
2035 		hfsmp->hfs_flags &= ~HFS_XATTR_EXTENTS;
2037 		hfsmp->hfs_flags |= HFS_XATTR_EXTENTS;
2039 	HFS_MOUNT_UNLOCK(hfsmp, TRUE);
2154 getnodecount(struct hfsmount *hfsmp, size_t nodesize)
2165 	freebytes = (u_int64_t)hfs_freeblks(hfsmp, 0) * (u_int64_t)hfsmp->blockSize;
2167 	calcbytes = MIN(hfsmp->hfs_catalog_cp->c_datafork->ff_size / 5, 20 * 1024 * 1024);
2169 	calcbytes = MAX(calcbytes, hfsmp->hfs_catalog_cp->c_datafork->ff_clumpsize);
2211  * 	- the attrdata vnode is initialized as hfsmp->hfs_attrdata_vp
2221 int init_attrdata_vnode(struct hfsmount *hfsmp)
2242 	cat_attr.ca_blocks = hfsmp->totalBlocks;
2260 	cat_fork.cf_size = (u_int64_t)hfsmp->totalBlocks * (u_int64_t)hfsmp->blockSize;
2261 	cat_fork.cf_blocks = hfsmp->totalBlocks;
2265 	result = hfs_getnewvnode(hfsmp, NULL, NULL, &cat_desc, 0, &cat_attr,
2268 		hfsmp->hfs_attrdata_vp = vp;
2278 read_attr_data(struct hfsmount *hfsmp, uio_t uio, size_t datasize, HFSPlusExtentDescriptor *extents)
2280 	vnode_t evp = hfsmp->hfs_attrdata_vp;
2292 	blksize = (int)hfsmp->blockSize;
2327 write_attr_data(struct hfsmount *hfsmp, uio_t uio, size_t datasize, HFSPlusExtentDescriptor *extents)
2329 	vnode_t evp = hfsmp->hfs_attrdata_vp;
2342 	blksize = (int) hfsmp->blockSize;
2377 alloc_attr_blks(struct hfsmount *hfsmp, size_t attrsize, size_t extentbufsize, HFSPlusExtentDescriptor *extents, int *blocks)
2386 	startblk = hfsmp->hfs_metazone_end;
2387 	blkcnt = howmany(attrsize, hfsmp->blockSize);
2388 	if (blkcnt > (int)hfs_freeblks(hfsmp, 0)) {
2394 	lockflags = hfs_systemfile_lock(hfsmp, SFL_BITMAP, HFS_EXCLUSIVE_LOCK);
2397 		result = BlockAllocate(hfsmp, startblk, blkcnt, blkcnt, 0,
2422 				(void) BlockDeallocate(hfsmp, extents[i].startBlock, blkcnt, 0);
2429 	hfs_systemfile_unlock(hfsmp, lockflags);
2437 free_attr_blks(struct hfsmount *hfsmp, int blkcnt, HFSPlusExtentDescriptor *extents)
2439 	vnode_t evp = hfsmp->hfs_attrdata_vp;
2444 	lockflags = hfs_systemfile_lock(hfsmp, SFL_BITMAP, HFS_EXCLUSIVE_LOCK);
2458 		(void)BlockDeallocate(hfsmp, extents[i].startBlock, extents[i].blockCount, 0);
2471 			start = (u_int64_t)extents[i].startBlock * (u_int64_t)hfsmp->blockSize;
2472 			end = start + (u_int64_t)extents[i].blockCount * (u_int64_t)hfsmp->blockSize;
2473 			(void) ubc_msync(hfsmp->hfs_attrdata_vp, start, end, &start, UBC_INVALIDATE);
2477 	hfs_systemfile_unlock(hfsmp, lockflags);