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28 * Copyright 2016 Cray Inc, all rights reserved.
31 * all fid manipulation functions go here
33 * FIDS are globally unique within a Lustre filessytem, and are made up
34 * of three parts: sequence, Object ID, and version.
37 #ifndef _UAPI_LUSTRE_FID_H_
38 #define _UAPI_LUSTRE_FID_H_
40 #include <linux/types.h>
41 #include <linux/lustre/lustre_idl.h>
43 /** returns fid object sequence */
44 static inline __u64 fid_seq(const struct lu_fid *fid)
49 /** returns fid object id */
50 static inline __u32 fid_oid(const struct lu_fid *fid)
55 /** returns fid object version */
56 static inline __u32 fid_ver(const struct lu_fid *fid)
61 static inline void fid_zero(struct lu_fid *fid)
63 memset(fid, 0, sizeof(*fid));
66 static inline __u64 fid_ver_oid(const struct lu_fid *fid)
68 return (__u64)fid_ver(fid) << 32 | fid_oid(fid);
71 static inline bool fid_seq_is_mdt0(__u64 seq)
73 return seq == FID_SEQ_OST_MDT0;
76 static inline bool fid_seq_is_mdt(__u64 seq)
78 return seq == FID_SEQ_OST_MDT0 || seq >= FID_SEQ_NORMAL;
81 static inline bool fid_seq_is_echo(__u64 seq)
83 return seq == FID_SEQ_ECHO;
86 static inline bool fid_is_echo(const struct lu_fid *fid)
88 return fid_seq_is_echo(fid_seq(fid));
91 static inline bool fid_seq_is_llog(__u64 seq)
93 return seq == FID_SEQ_LLOG;
96 static inline bool fid_is_llog(const struct lu_fid *fid)
98 /* file with OID == 0 is not llog but contains last oid */
99 return fid_seq_is_llog(fid_seq(fid)) && fid_oid(fid) > 0;
102 static inline bool fid_seq_is_rsvd(__u64 seq)
104 return seq > FID_SEQ_OST_MDT0 && seq <= FID_SEQ_RSVD;
107 static inline bool fid_seq_is_special(__u64 seq)
109 return seq == FID_SEQ_SPECIAL;
112 static inline bool fid_seq_is_local_file(__u64 seq)
114 return seq == FID_SEQ_LOCAL_FILE ||
115 seq == FID_SEQ_LOCAL_NAME;
118 static inline bool fid_seq_is_root(__u64 seq)
120 return seq == FID_SEQ_ROOT;
123 static inline bool fid_seq_is_dot(__u64 seq)
125 return seq == FID_SEQ_DOT_LUSTRE;
128 static inline bool fid_seq_is_default(__u64 seq)
130 return seq == FID_SEQ_LOV_DEFAULT;
133 static inline bool fid_is_mdt0(const struct lu_fid *fid)
135 return fid_seq_is_mdt0(fid_seq(fid));
138 static inline void lu_root_fid(struct lu_fid *fid)
140 fid->f_seq = FID_SEQ_ROOT;
141 fid->f_oid = FID_OID_ROOT;
145 static inline void lu_echo_root_fid(struct lu_fid *fid)
147 fid->f_seq = FID_SEQ_ROOT;
148 fid->f_oid = FID_OID_ECHO_ROOT;
152 static inline void lu_update_log_fid(struct lu_fid *fid, __u32 index)
154 fid->f_seq = FID_SEQ_UPDATE_LOG;
159 static inline void lu_update_log_dir_fid(struct lu_fid *fid, __u32 index)
161 fid->f_seq = FID_SEQ_UPDATE_LOG_DIR;
167 * Check if a fid is igif or not.
168 * \param fid the fid to be tested.
169 * \return true if the fid is an igif; otherwise false.
171 static inline bool fid_seq_is_igif(__u64 seq)
173 return seq >= FID_SEQ_IGIF && seq <= FID_SEQ_IGIF_MAX;
176 static inline bool fid_is_igif(const struct lu_fid *fid)
178 return fid_seq_is_igif(fid_seq(fid));
182 * Check if a fid is idif or not.
183 * \param fid the fid to be tested.
184 * \return true if the fid is an idif; otherwise false.
186 static inline bool fid_seq_is_idif(__u64 seq)
188 return seq >= FID_SEQ_IDIF && seq <= FID_SEQ_IDIF_MAX;
191 static inline bool fid_is_idif(const struct lu_fid *fid)
193 return fid_seq_is_idif(fid_seq(fid));
196 static inline bool fid_is_local_file(const struct lu_fid *fid)
198 return fid_seq_is_local_file(fid_seq(fid));
201 static inline bool fid_seq_is_norm(__u64 seq)
203 return (seq >= FID_SEQ_NORMAL);
206 static inline bool fid_is_norm(const struct lu_fid *fid)
208 return fid_seq_is_norm(fid_seq(fid));
211 static inline int fid_is_layout_rbtree(const struct lu_fid *fid)
213 return fid_seq(fid) == FID_SEQ_LAYOUT_RBTREE;
216 static inline bool fid_seq_is_update_log(__u64 seq)
218 return seq == FID_SEQ_UPDATE_LOG;
221 static inline bool fid_is_update_log(const struct lu_fid *fid)
223 return fid_seq_is_update_log(fid_seq(fid));
226 static inline bool fid_seq_is_update_log_dir(__u64 seq)
228 return seq == FID_SEQ_UPDATE_LOG_DIR;
231 static inline bool fid_is_update_log_dir(const struct lu_fid *fid)
233 return fid_seq_is_update_log_dir(fid_seq(fid));
236 /* convert an OST objid into an IDIF FID SEQ number */
237 static inline __u64 fid_idif_seq(__u64 id, __u32 ost_idx)
239 return FID_SEQ_IDIF | (ost_idx << 16) | ((id >> 32) & 0xffff);
242 /* convert a packed IDIF FID into an OST objid */
243 static inline __u64 fid_idif_id(__u64 seq, __u32 oid, __u32 ver)
245 return ((__u64)ver << 48) | ((seq & 0xffff) << 32) | oid;
248 static inline __u32 idif_ost_idx(__u64 seq)
250 return (seq >> 16) & 0xffff;
253 /* extract ost index from IDIF FID */
254 static inline __u32 fid_idif_ost_idx(const struct lu_fid *fid)
256 return idif_ost_idx(fid_seq(fid));
259 /* Check whether the fid is for LAST_ID */
260 static inline bool fid_is_last_id(const struct lu_fid *fid)
262 if (fid_oid(fid) != 0)
265 if (fid_is_idif(fid) && ((fid_seq(fid) & 0xFFFF) != 0))
268 if (fid_seq(fid) == FID_SEQ_UPDATE_LOG ||
269 fid_seq(fid) == FID_SEQ_UPDATE_LOG_DIR ||
270 fid_seq_is_igif(fid_seq(fid)))
277 * Get inode number from an igif.
278 * \param fid an igif to get inode number from.
279 * \return inode number for the igif.
281 static inline __kernel_ino_t lu_igif_ino(const struct lu_fid *fid)
287 * Get inode generation from an igif.
288 * \param fid an igif to get inode generation from.
289 * \return inode generation for the igif.
291 static inline __u32 lu_igif_gen(const struct lu_fid *fid)
297 * Build igif from the inode number/generation.
299 static inline void lu_igif_build(struct lu_fid *fid, __u32 ino, __u32 gen)
307 * Fids are transmitted across network (in the sender byte-ordering),
308 * and stored on disk in big-endian order.
310 static inline void fid_cpu_to_le(struct lu_fid *dst, const struct lu_fid *src)
312 dst->f_seq = __cpu_to_le64(fid_seq(src));
313 dst->f_oid = __cpu_to_le32(fid_oid(src));
314 dst->f_ver = __cpu_to_le32(fid_ver(src));
317 static inline void fid_le_to_cpu(struct lu_fid *dst, const struct lu_fid *src)
319 dst->f_seq = __le64_to_cpu(fid_seq(src));
320 dst->f_oid = __le32_to_cpu(fid_oid(src));
321 dst->f_ver = __le32_to_cpu(fid_ver(src));
324 static inline void fid_cpu_to_be(struct lu_fid *dst, const struct lu_fid *src)
326 dst->f_seq = __cpu_to_be64(fid_seq(src));
327 dst->f_oid = __cpu_to_be32(fid_oid(src));
328 dst->f_ver = __cpu_to_be32(fid_ver(src));
331 static inline void fid_be_to_cpu(struct lu_fid *dst, const struct lu_fid *src)
333 dst->f_seq = __be64_to_cpu(fid_seq(src));
334 dst->f_oid = __be32_to_cpu(fid_oid(src));
335 dst->f_ver = __be32_to_cpu(fid_ver(src));
338 static inline bool fid_is_sane(const struct lu_fid *fid)
340 return fid && ((fid_seq(fid) >= FID_SEQ_START && !fid_ver(fid)) ||
341 fid_is_igif(fid) || fid_is_idif(fid) ||
342 fid_seq_is_rsvd(fid_seq(fid)));
345 static inline bool lu_fid_eq(const struct lu_fid *f0, const struct lu_fid *f1)
347 return !memcmp(f0, f1, sizeof(*f0));
350 static inline int lu_fid_cmp(const struct lu_fid *f0,
351 const struct lu_fid *f1)
353 if (fid_seq(f0) != fid_seq(f1))
354 return fid_seq(f0) > fid_seq(f1) ? 1 : -1;
356 if (fid_oid(f0) != fid_oid(f1))
357 return fid_oid(f0) > fid_oid(f1) ? 1 : -1;
359 if (fid_ver(f0) != fid_ver(f1))
360 return fid_ver(f0) > fid_ver(f1) ? 1 : -1;