fs/nfsd/nfsfh.h

1 /* SPDX-License-Identifier: GPL-2.0 */
18  * The file handle starts with a sequence of four-byte words.
23  * All four-byte values are in host-byte-order.
30  *     0  - 4 byte device id (ms-2-bytes major, ls-2-bytes minor), 4byte inode number
33  *     1  - 4 byte user specified identifier
34  *     2  - 4 byte major, 4 byte minor, 4 byte inode number - DEPRECATED
35  *     3  - 4 byte device id, encoded for user-space, 4 byte inode number
36  *     4  - 4 byte inode number and 4 byte uuid
37  *     5  - 8 byte uuid
38  *     6  - 16 byte uuid
39  *     7  - 8 byte inode number and 16 byte uuid
59 			u32		fh_fsid[]; /* flexible-array member */
94 	bool			fh_post_saved;	/* post-op attrs saved */
95 	bool			fh_pre_saved;	/* pre-op attrs saved */
97 	/* Pre-op attributes saved when inode is locked */
102 	 * pre-op nfsv4 change attr: note must check IS_I_VERSION(inode)
107 	/* Post-op attributes saved in fh_fill_post_attrs() */
112 #define SET_FH_FLAG(c, f) ((c)->fh_flags |= (f))
113 #define HAS_FH_FLAG(c, f) ((c)->fh_flags & (f))
169 		/* 4 byte fsid and inode number */  in mk_fsid()
176 		/* 8 byte fsid  */  in mk_fsid()
183 		/* 16 byte fsid - NFSv3+ only */  in mk_fsid()
188 		/* 8 byte inode and 16 byte fsid */  in mk_fsid()
229 	WARN_ON(src->fh_dentry);  in fh_copy()
238 	dst->fh_size = src->fh_size;  in fh_copy_shallow()
239 	memcpy(&dst->fh_raw, &src->fh_raw, src->fh_size);  in fh_copy_shallow()
246 	fhp->fh_maxsize = maxsize;  in fh_init()
253 	if (fh1->fh_size != fh2->fh_size)  in fh_match()
255 	if (memcmp(fh1->fh_raw, fh2->fh_raw, fh1->fh_size) != 0)  in fh_match()
263 	if (fh1->fh_fsid_type != fh2->fh_fsid_type)  in fh_fsid_match()
265 	if (memcmp(fh1->fh_fsid, fh2->fh_fsid, key_len(fh1->fh_fsid_type)) != 0)  in fh_fsid_match()
272  * knfsd_fh_hash - calculate the crc32 hash for the filehandle
273  * @fh - pointer to filehandle
280 	return ~crc32_le(0xFFFFFFFF, fh->fh_raw, fh->fh_size);  in knfsd_fh_hash()
290  * fh_clear_pre_post_attrs - Reset pre/post attributes
296 	fhp->fh_post_saved = false;  in fh_clear_pre_post_attrs()
297 	fhp->fh_pre_saved = false;  in fh_clear_pre_post_attrs()