bsd/hfs/hfs_cnode.h

55  * Reading or writing any of these fields requires holding cnode lock.
58 	struct cnode   *ff_cp;               /* cnode associated with this fork */
128  * The cnode is used to represent each active (or recently active)
133 struct cnode {
134 	lck_rw_t                c_rwlock;       /* cnode's lock */
135 	void *                  c_lockowner;    /* cnode's lock owner (exclusive case only) */
138 	LIST_ENTRY(cnode)	c_hash;		/* cnode's hash chain */
139 	u_int32_t		c_flag;		/* cnode's runtime flags */
140 	u_int32_t		c_hflag;	/* cnode's flags for maintaining hash - protected by global hash lock */
143     struct dquot		*c_dquot[MAXQUOTAS]; /* cnode's quota info */
146 	struct cat_desc		c_desc;		/* cnode's descriptor */
147 	struct cat_attr		c_attr;		/* cnode's attributes */
156  	struct filefork		*c_datafork;	/* cnode's data fork */
157 	struct filefork		*c_rsrcfork;	/* cnode's rsrc fork */
169 typedef struct cnode cnode_t;
171 /* Aliases for common cnode fields */
205 /* Runtime cnode flags (kept in c_flag) */
217 #define C_HASXATTRS        0x00200  /* cnode has extended attributes */
222  * purely advisory at the HFS level, and is not maintained after the cnode goes out of core.
231 #define C_RENAMED			0x10000	/* cnode was deleted as part of rename; C_DELETED should also be set */
232 #define C_NEEDS_DATEADDED	0x20000 /* cnode needs date-added written to the finderinfo bit */
233 #define C_BACKINGSTORE		0x40000 /* cnode is a backing store for an existing or currently-mounting filesystem */
234 #define C_SWAPINPROGRESS   	0x80000	/* cnode's data is about to be swapped.  Issue synchronous cluster io */
247  * Convert between cnode pointers and vnode pointers
249 #define VTOC(vp)	((struct cnode *)vnode_fsnode((vp)))
275  * This is a helper function used for determining whether or not a cnode has become open
276  * unlinked in between the time we acquired its vnode and the time we acquire the cnode lock
278  * use this macro every time we acquire a cnode lock, as the content of the Cnode may have
283 int hfs_checkdeleted(struct cnode *cp);
299 int hfs_file_is_compressed(struct cnode *cp, int skiplock);
301 int hfs_hides_rsrc(vfs_context_t ctx, struct cnode *cp, int skiplock);
302 int hfs_hides_xattr(vfs_context_t ctx, struct cnode *cp, const char *name, int skiplock);
323 #define GNV_SKIPLOCK   0x02  /* Skip taking the cnode lock (when getting resource fork). */
328 #define GNV_CHASH_RENAMED	0x01	/* The cnode was renamed in-flight */
329 #define GNV_CAT_DELETED		0x02	/* The cnode was deleted from the catalog */
330 #define GNV_NEW_CNODE		0x04	/* We are vending out a newly initialized cnode */
333 /* Touch cnode times based on c_touch_xxx flags */
334 extern void hfs_touchtimes(struct hfsmount *, struct cnode *);
336 extern u_int32_t hfs_get_dateadded (struct cnode *cp);
342  * HFS cnode hash functions.
347 extern int   hfs_chashremove(struct hfsmount *hfsmp, struct cnode *cp);
348 extern void  hfs_chash_abort(struct hfsmount *hfsmp, struct cnode *cp);
349 extern void  hfs_chash_rehash(struct hfsmount *hfsmp, struct cnode *cp1, struct cnode *cp2);
350 extern void  hfs_chashwakeup(struct hfsmount *hfsmp, struct cnode *cp, int flags);
351 extern void  hfs_chash_mark_in_transit(struct hfsmount *hfsmp, struct cnode *cp);
355 extern struct cnode * hfs_chash_getcnode(struct hfsmount *hfsmp, ino_t inum, struct vnode **vpp,
365  * HFS cnode lock functions.
369  *  1. cnode truncate lock (if needed)
370  *  2. cnode lock (in parent-child order if related, otherwise by address order)
381  * I. HFS cnode hash lock (must not acquire any new locks while holding this lock, always taken last)
386 int hfs_lock(struct cnode *, enum hfslocktype);
387 int hfs_lockpair(struct cnode *, struct cnode *, enum hfslocktype);
388 int hfs_lockfour(struct cnode *, struct cnode *, struct cnode *, struct cnode *,
389                         enum hfslocktype, struct cnode **);
391 void hfs_unlock(struct cnode *);
392 void hfs_unlockpair(struct cnode *, struct cnode *);
393 void hfs_unlockfour(struct cnode *, struct cnode *, struct cnode *, struct cnode *);
395 void hfs_lock_truncate(struct cnode *, enum hfslocktype);
396 void hfs_unlock_truncate(struct cnode *, int been_recursed);
398 int hfs_try_trunclock(struct cnode *, enum hfslocktype);