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Use vfs_hash instead of home-rolled.
This commit is contained in:
Poul-Henning Kamp
parent
e10c321f69
commit
2f00593534
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=143588
@ -892,7 +892,6 @@ fs/fdescfs/fdesc_vfsops.c optional fdescfs
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fs/fdescfs/fdesc_vnops.c optional fdescfs
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fs/fifofs/fifo_vnops.c standard
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fs/hpfs/hpfs_alsubr.c optional hpfs
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fs/hpfs/hpfs_hash.c optional hpfs
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fs/hpfs/hpfs_lookup.c optional hpfs
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fs/hpfs/hpfs_subr.c optional hpfs
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fs/hpfs/hpfs_vfsops.c optional hpfs
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@ -329,7 +329,6 @@ struct hpfsmount {
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u_int8_t * hpm_bitmap;
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};
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#define H_HASHED 0x0001 /* Present in hash */
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#define H_PARVALID 0x0002 /* parent info is valid */
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#define H_CHANGE 0x0004 /* node date was changed */
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#define H_PARCHANGE 0x0008 /* parent node date was changed */
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@ -337,8 +336,6 @@ struct hpfsmount {
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struct hpfsnode {
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struct mtx h_interlock;
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LIST_ENTRY(hpfsnode) h_hash;
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struct hpfsmount *h_hpmp;
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struct fnode h_fn;
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struct vnode * h_vp;
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@ -388,13 +385,3 @@ MALLOC_DECLARE(M_HPFSNO);
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#define FID(f) (*((lsn_t *)(f)->fid_data))
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extern struct vop_vector hpfs_vnodeops;
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/* Hash routines, too small to be separate header */
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void hpfs_hphashinit(void);
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void hpfs_hphashdestroy(void);
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struct hpfsnode *hpfs_hphashlookup(struct cdev *, lsn_t);
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struct hpfsnode *hpfs_hphashget(struct cdev *, lsn_t);
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int hpfs_hphashvget(struct cdev *, lsn_t, int, struct vnode **, struct thread *);
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void hpfs_hphashins(register struct hpfsnode *);
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void hpfs_hphashrem(register struct hpfsnode *);
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extern struct lock hpfs_hphash_lock;
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@ -49,7 +49,7 @@ static MALLOC_DEFINE(M_HPFSHASH, "HPFS hash", "HPFS node hash tables");
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*/
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static LIST_HEAD(hphashhead, hpfsnode) *hpfs_hphashtbl;
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static u_long hpfs_hphash; /* size of hash table - 1 */
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#define HPNOHASH(dev, lsn) (&hpfs_hphashtbl[(minor(dev) + (lsn)) & hpfs_hphash])
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#define HPNOHASH(lsn) (&hpfs_hphashtbl[(lsn) & hpfs_hphash])
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static struct mtx hpfs_hphash_mtx;
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struct lock hpfs_hphash_lock;
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@ -88,7 +88,7 @@ hpfs_hphashlookup(dev, ino)
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struct hpfsnode *hp;
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mtx_lock(&hpfs_hphash_mtx);
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LIST_FOREACH(hp, HPNOHASH(dev, ino), h_hash)
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LIST_FOREACH(hp, HPNOHASH(ino), h_hash)
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if (ino == hp->h_no && dev == hp->h_dev)
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break;
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mtx_unlock(&hpfs_hphash_mtx);
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@ -106,7 +106,7 @@ hpfs_hphashget(dev, ino)
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loop:
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mtx_lock(&hpfs_hphash_mtx);
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LIST_FOREACH(hp, HPNOHASH(dev, ino), h_hash) {
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LIST_FOREACH(hp, HPNOHASH(ino), h_hash) {
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if (ino == hp->h_no && dev == hp->h_dev) {
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lockmgr(&hp->h_intlock, LK_EXCLUSIVE | LK_INTERLOCK,
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&hpfs_hphash_slock, NULL);
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@ -133,7 +133,7 @@ hpfs_hphashvget(dev, ino, flags, vpp, td)
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*vpp = NULLVP;
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loop:
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mtx_lock(&hpfs_hphash_mtx);
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LIST_FOREACH(hp, HPNOHASH(dev, ino), h_hash) {
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LIST_FOREACH(hp, HPNOHASH(ino), h_hash) {
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if (ino == hp->h_no && dev == hp->h_dev) {
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vp = HPTOV(hp);
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mtx_lock(&vp->v_interlock);
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@ -161,7 +161,7 @@ hpfs_hphashins(hp)
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struct hphashhead *hpp;
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mtx_lock(&hpfs_hphash_mtx);
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hpp = HPNOHASH(hp->h_dev, hp->h_no);
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hpp = HPNOHASH(hp->h_no);
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hp->h_flag |= H_HASHED;
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LIST_INSERT_HEAD(hpp, hp, h_hash);
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mtx_unlock(&hpfs_hphash_mtx);
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@ -61,8 +61,6 @@ struct sockaddr;
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static int hpfs_mountfs(register struct vnode *, struct mount *,
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struct thread *);
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static vfs_init_t hpfs_init;
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static vfs_uninit_t hpfs_uninit;
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static vfs_fhtovp_t hpfs_fhtovp;
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static vfs_vget_t hpfs_vget;
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static vfs_cmount_t hpfs_cmount;
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@ -72,24 +70,6 @@ static vfs_statfs_t hpfs_statfs;
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static vfs_unmount_t hpfs_unmount;
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static vfs_vptofh_t hpfs_vptofh;
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static int
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hpfs_init (
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struct vfsconf *vcp )
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{
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dprintf(("hpfs_init():\n"));
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hpfs_hphashinit();
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return 0;
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}
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static int
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hpfs_uninit (vfsp)
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struct vfsconf *vfsp;
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{
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hpfs_hphashdestroy();
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return 0;;
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}
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static int
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hpfs_cmount (
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struct mntarg *ma,
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@ -484,17 +464,16 @@ hpfs_vget(
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dprintf(("hpfs_vget(0x%x): ",ino));
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error = vfs_hash_get(mp, ino, flags, curthread, vpp);
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if (error)
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return (error);
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if (*vpp != NULL)
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return (0);
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*vpp = NULL;
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hp = NULL;
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vp = NULL;
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if ((error = hpfs_hphashvget(hpmp->hpm_dev, ino, flags, vpp, td)) != 0)
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return (error);
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if (*vpp != NULL) {
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dprintf(("hashed\n"));
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return (0);
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}
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/*
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* We have to lock node creation for a while,
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* but then we have to call getnewvnode(),
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@ -536,30 +515,32 @@ hpfs_vget(
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hp->h_gid = hpmp->hpm_uid;
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hp->h_mode = hpmp->hpm_mode;
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hp->h_devvp = hpmp->hpm_devvp;
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VREF(hp->h_devvp);
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error = vn_lock(vp, LK_EXCLUSIVE, td);
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if (error) {
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/*
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* Exclusively lock the vnode before adding to hash. Note, that we
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* must not release nor downgrade the lock (despite flags argument
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* says) till it is fully initialized.
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*/
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lockmgr(vp->v_vnlock, LK_EXCLUSIVE, (struct mtx *)0, td);
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/*
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* Atomicaly (in terms of vfs_hash operations) check the hash for
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* duplicate of vnode being created and add it to the hash. If a
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* duplicate vnode was found, it will be vget()ed from hash for us.
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*/
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if ((error = vfs_hash_insert(vp, ino, flags, curthread, vpp)) != 0) {
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vput(vp);
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*vpp = NULL;
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return (error);
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}
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do {
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if ((error =
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hpfs_hphashvget(hpmp->hpm_dev, ino, flags, vpp, td))) {
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vput(vp);
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return (error);
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}
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if (*vpp != NULL) {
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dprintf(("hashed2\n"));
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vput(vp);
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return (0);
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}
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} while(lockmgr(&hpfs_hphash_lock,LK_EXCLUSIVE|LK_SLEEPFAIL,NULL,NULL));
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/* We lost the race, then throw away our vnode and return existing */
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if (*vpp != NULL) {
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vput(vp);
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return (0);
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}
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hpfs_hphashins(hp);
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lockmgr(&hpfs_hphash_lock, LK_RELEASE, NULL, NULL);
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VREF(hp->h_devvp);
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error = bread(hpmp->hpm_devvp, ino, FNODESIZE, NOCRED, &bp);
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if (error) {
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@ -586,12 +567,10 @@ hpfs_vget(
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static struct vfsops hpfs_vfsops = {
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.vfs_fhtovp = hpfs_fhtovp,
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.vfs_init = hpfs_init,
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.vfs_cmount = hpfs_cmount,
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.vfs_mount = hpfs_mount,
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.vfs_root = hpfs_root,
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.vfs_statfs = hpfs_statfs,
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.vfs_uninit = hpfs_uninit,
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.vfs_unmount = hpfs_unmount,
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.vfs_vget = hpfs_vget,
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.vfs_vptofh = hpfs_vptofh,
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@ -30,6 +30,7 @@
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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@ -599,7 +600,7 @@ hpfs_reclaim(ap)
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dprintf(("hpfs_reclaim(0x%x0): \n", hp->h_no));
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hpfs_hphashrem(hp);
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vfs_hash_remove(vp);
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/* Purge old data structures associated with the inode. */
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if (hp->h_devvp) {
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