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Deduplicate fsid comparisons

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Comparing fsid_t objects requires internal knowledge of the fsid structure
and yet this is duplicated across a number of places in the code.

Simplify by creating a fsidcmp function (macro).

Reviewed by:	mjg, rmacklem
Approved by:	mav (mentor)
MFC after:	1 week
Sponsored by:	iXsystems, Inc.
Differential Revision:	https://reviews.freebsd.org/D24749
This commit is contained in:
Ryan Moeller 2020-05-21 01:55:35 +00:00
parent 49caa483b3
commit 245bfd34da
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=361313
13 changed files with 34 additions and 65 deletions
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5
lib/libugidfw/ugidfw.c
View File

@ -334,9 +334,8 @@ bsde_rule_to_string(struct mac_bsdextended_rule *rule, char *buf, size_t buflen)
if (rule->mbr_object.mbo_flags & MBO_FSID_DEFINED) {
numfs = getmntinfo(&mntbuf, MNT_NOWAIT);
for (i = 0; i < numfs; i++)
if (memcmp(&(rule->mbr_object.mbo_fsid),
&(mntbuf[i].f_fsid),
sizeof(mntbuf[i].f_fsid)) == 0)
if (fsidcmp(&rule->mbr_object.mbo_fsid,
&mntbuf[i].f_fsid) == 0)
break;
len = snprintf(cur, left, "filesys %s ",
i == numfs ? "???" : mntbuf[i].f_mntonname);

3
sbin/mksnap_ffs/mksnap_ffs.c
View File

@ -81,8 +81,7 @@ issamefs(const char *path, struct statfs *stfsp)
return (-1);
if (statfs(path, &stfsbuf) < 0)
return (-1);
if ((stfsbuf.f_fsid.val[0] != stfsp->f_fsid.val[0]) ||
(stfsbuf.f_fsid.val[1] != stfsp->f_fsid.val[1]))
if (fsidcmp(&stfsbuf.f_fsid, &stfsp->f_fsid) != 0)
return (0);
return (1);
}

3
sbin/umount/umount.c
View File

@ -505,8 +505,7 @@ getmntentry(const char *fromname, const char *onname, fsid_t *fsid, dowhat what)
continue;
if (onname != NULL && strcmp(sfs->f_mntonname, onname) != 0)
continue;
if (fsid != NULL && bcmp(&sfs->f_fsid, fsid,
sizeof(*fsid)) != 0)
if (fsid != NULL && fsidcmp(&sfs->f_fsid, fsid) != 0)
continue;
switch (what) {

3
sys/fs/nfs/nfsdport.h
View File

@ -85,8 +85,7 @@ struct nfsexstuff {
#define NFSVNO_SETEXRDONLY(e) ((e)->nes_exflag = (MNT_EXPORTED|MNT_EXRDONLY))
#define NFSVNO_CMPFH(f1, f2) \
((f1)->fh_fsid.val[0] == (f2)->fh_fsid.val[0] && \
(f1)->fh_fsid.val[1] == (f2)->fh_fsid.val[1] && \
(fsidcmp(&(f1)->fh_fsid, &(f2)->fh_fsid) == 0 && \
bcmp(&(f1)->fh_fid, &(f2)->fh_fid, sizeof(struct fid)) == 0)
#define NFSLOCKHASH(f) \

22
sys/fs/nfsserver/nfs_nfsdport.c
View File

@ -4019,11 +4019,8 @@ nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred,
if (tds->nfsdev_nmp != NULL) {
if (tds->nfsdev_mdsisset == 0 && ds == NULL)
ds = tds;
else if (tds->nfsdev_mdsisset != 0 &&
mp->mnt_stat.f_fsid.val[0] ==
tds->nfsdev_mdsfsid.val[0] &&
mp->mnt_stat.f_fsid.val[1] ==
tds->nfsdev_mdsfsid.val[1]) {
else if (tds->nfsdev_mdsisset != 0 && fsidcmp(
&mp->mnt_stat.f_fsid, &tds->nfsdev_mdsfsid) == 0) {
ds = fds = tds;
break;
}
@ -4043,10 +4040,8 @@ nfsrv_pnfscreate(struct vnode *vp, struct vattr *vap, struct ucred *cred,
if (tds->nfsdev_nmp != NULL &&
((tds->nfsdev_mdsisset == 0 && fds == NULL) ||
(tds->nfsdev_mdsisset != 0 && fds != NULL &&
mp->mnt_stat.f_fsid.val[0] ==
tds->nfsdev_mdsfsid.val[0] &&
mp->mnt_stat.f_fsid.val[1] ==
tds->nfsdev_mdsfsid.val[1]))) {
fsidcmp(&mp->mnt_stat.f_fsid,
&tds->nfsdev_mdsfsid) == 0))) {
dsdir[mirrorcnt] = i;
dvp[mirrorcnt] = tds->nfsdev_dsdir[i];
mirrorcnt++;
@ -4778,10 +4773,8 @@ nfsrv_dsgetsockmnt(struct vnode *vp, int lktype, char *buf, int *buflenp,
fndds->nfsdev_mdsisset == 0) ||
(tds->nfsdev_mdsisset != 0 &&
fndds->nfsdev_mdsisset != 0 &&
tds->nfsdev_mdsfsid.val[0] ==
mp->mnt_stat.f_fsid.val[0] &&
tds->nfsdev_mdsfsid.val[1] ==
mp->mnt_stat.f_fsid.val[1]))) {
fsidcmp(&tds->nfsdev_mdsfsid,
&mp->mnt_stat.f_fsid) == 0))) {
*newnmpp = tds->nfsdev_nmp;
break;
}
@ -5968,8 +5961,7 @@ nfsrv_pnfsstatfs(struct statfs *sf, struct mount *mp)
/* First, search for matches for same file system. */
TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
if (ds->nfsdev_nmp != NULL && ds->nfsdev_mdsisset != 0 &&
ds->nfsdev_mdsfsid.val[0] == mp->mnt_stat.f_fsid.val[0] &&
ds->nfsdev_mdsfsid.val[1] == mp->mnt_stat.f_fsid.val[1]) {
fsidcmp(&ds->nfsdev_mdsfsid, &mp->mnt_stat.f_fsid) == 0) {
if (++i > nfsrv_devidcnt)
break;
*tdvpp++ = ds->nfsdev_dvp;

8
sys/fs/nfsserver/nfs_nfsdsocket.c
View File

@ -1059,10 +1059,7 @@ nfsrvd_compound(struct nfsrv_descript *nd, int isdgram, u_char *tag,
if (!error && !nd->nd_repstat) {
if (op == NFSV4OP_LOOKUP || op == NFSV4OP_LOOKUPP) {
new_mp = nvp->v_mount;
if (cur_fsid.val[0] !=
new_mp->mnt_stat.f_fsid.val[0] ||
cur_fsid.val[1] !=
new_mp->mnt_stat.f_fsid.val[1]) {
if (fsidcmp(&cur_fsid, &new_mp->mnt_stat.f_fsid) != 0) {
/* crossed a server mount point */
nd->nd_repstat = nfsvno_checkexp(new_mp,
nd->nd_nam, &nes, &credanon);
@ -1091,8 +1088,7 @@ nfsrvd_compound(struct nfsrv_descript *nd, int isdgram, u_char *tag,
if (vp == NULL || savevp == NULL) {
nd->nd_repstat = NFSERR_NOFILEHANDLE;
break;
} else if (cur_fsid.val[0] != save_fsid.val[0] ||
cur_fsid.val[1] != save_fsid.val[1]) {
} else if (fsidcmp(&cur_fsid, &save_fsid) != 0) {
nd->nd_repstat = NFSERR_XDEV;
break;
}

15
sys/fs/nfsserver/nfs_nfsdstate.c
View File

@ -7535,8 +7535,7 @@ nfsrv_freelayouts(nfsquad_t *clid, fsid_t *fs, int laytype, int iomode)
TAILQ_FOREACH_SAFE(lyp, &lhyp->list, lay_list, nlyp) {
if (clid->qval != lyp->lay_clientid.qval)
continue;
if (fs != NULL && (fs->val[0] != lyp->lay_fsid.val[0] ||
fs->val[1] != lyp->lay_fsid.val[1]))
if (fs != NULL && fsidcmp(fs, &lyp->lay_fsid) != 0)
continue;
if (laytype != lyp->lay_type)
continue;
@ -7830,10 +7829,8 @@ nfsrv_delds(char *devid, NFSPROC_T *p)
TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
if (ds != fndds && ds->nfsdev_nmp != NULL &&
ds->nfsdev_mdsisset != 0 &&
ds->nfsdev_mdsfsid.val[0] ==
fndds->nfsdev_mdsfsid.val[0] &&
ds->nfsdev_mdsfsid.val[1] ==
fndds->nfsdev_mdsfsid.val[1]) {
fsidcmp(&ds->nfsdev_mdsfsid,
&fndds->nfsdev_mdsfsid) == 0) {
fndmirror = 1;
break;
}
@ -8737,10 +8734,8 @@ nfsrv_findmirroredds(struct nfsmount *nmp)
TAILQ_FOREACH(ds, &nfsrv_devidhead, nfsdev_list) {
if (ds != fndds && ds->nfsdev_nmp != NULL &&
ds->nfsdev_mdsisset != 0 &&
ds->nfsdev_mdsfsid.val[0] ==
fndds->nfsdev_mdsfsid.val[0] &&
ds->nfsdev_mdsfsid.val[1] ==
fndds->nfsdev_mdsfsid.val[1]) {
fsidcmp(&ds->nfsdev_mdsfsid,
&fndds->nfsdev_mdsfsid) == 0) {
fndmirror = 1;
break;
}

13
sys/kern/vfs_subr.c
View File

@ -841,8 +841,7 @@ vfs_getvfs(fsid_t *fsid)
CTR2(KTR_VFS, "%s: fsid %p", __func__, fsid);
mtx_lock(&mountlist_mtx);
TAILQ_FOREACH(mp, &mountlist, mnt_list) {
if (mp->mnt_stat.f_fsid.val[0] == fsid->val[0] &&
mp->mnt_stat.f_fsid.val[1] == fsid->val[1]) {
if (fsidcmp(&mp->mnt_stat.f_fsid, fsid) == 0) {
vfs_ref(mp);
mtx_unlock(&mountlist_mtx);
return (mp);
@ -877,16 +876,13 @@ vfs_busyfs(fsid_t *fsid)
hash = fsid->val[0] ^ fsid->val[1];
hash = (hash >> 16 ^ hash) & (FSID_CACHE_SIZE - 1);
mp = cache[hash];
if (mp == NULL ||
mp->mnt_stat.f_fsid.val[0] != fsid->val[0] ||
mp->mnt_stat.f_fsid.val[1] != fsid->val[1])
if (mp == NULL || fsidcmp(&mp->mnt_stat.f_fsid, fsid) != 0)
goto slow;
if (vfs_busy(mp, 0) != 0) {
cache[hash] = NULL;
goto slow;
}
if (mp->mnt_stat.f_fsid.val[0] == fsid->val[0] &&
mp->mnt_stat.f_fsid.val[1] == fsid->val[1])
if (fsidcmp(&mp->mnt_stat.f_fsid, fsid) == 0)
return (mp);
else
vfs_unbusy(mp);
@ -894,8 +890,7 @@ vfs_busyfs(fsid_t *fsid)
slow:
mtx_lock(&mountlist_mtx);
TAILQ_FOREACH(mp, &mountlist, mnt_list) {
if (mp->mnt_stat.f_fsid.val[0] == fsid->val[0] &&
mp->mnt_stat.f_fsid.val[1] == fsid->val[1]) {
if (fsidcmp(&mp->mnt_stat.f_fsid, fsid) == 0) {
error = vfs_busy(mp, MBF_MNTLSTLOCK);
if (error) {
cache[hash] = NULL;

5
sys/security/mac_bsdextended/mac_bsdextended.c
View File

@ -302,9 +302,8 @@ ugidfw_rulecheck(struct mac_bsdextended_rule *rule,
}
if (rule->mbr_object.mbo_flags & MBO_FSID_DEFINED) {
match = (bcmp(&(vp->v_mount->mnt_stat.f_fsid),
&(rule->mbr_object.mbo_fsid),
sizeof(rule->mbr_object.mbo_fsid)) == 0);
match = (fsidcmp(&vp->v_mount->mnt_stat.f_fsid,
&rule->mbr_object.mbo_fsid) == 0);
if (rule->mbr_object.mbo_neg & MBO_FSID_DEFINED)
match = !match;
if (!match)

2
sys/security/mac_bsdextended/mac_bsdextended.h
View File

@ -101,7 +101,7 @@ struct mac_bsdextended_object {
uid_t mbo_uid_max;
gid_t mbo_gid_min;
gid_t mbo_gid_max;
struct fsid mbo_fsid;
fsid_t mbo_fsid;
int mbo_type;
};

2
sys/sys/mount.h
View File

@ -52,6 +52,8 @@
typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */
#define fsidcmp(a, b) memcmp((a), (b), sizeof(fsid_t))
/*
* File identifier.
* These are unique per filesystem on a single machine.

3
usr.sbin/autofs/autounmountd.c
View File

@ -67,8 +67,7 @@ automounted_find(fsid_t fsid)
struct automounted_fs *af;
TAILQ_FOREACH(af, &automounted, af_next) {
if (af->af_fsid.val[0] == fsid.val[0] &&
af->af_fsid.val[1] == fsid.val[1])
if (fsidcmp(&af->af_fsid, &fsid) == 0)
return (af);
}

15
usr.sbin/mountd/mountd.c
View File

@ -1568,10 +1568,8 @@ get_exportlist_one(int passno)
ep = get_exp();
} else {
if (ep) {
if (ep->ex_fs.val[0] !=
fsb.f_fsid.val[0] ||
ep->ex_fs.val[1] !=
fsb.f_fsid.val[1]) {
if (fsidcmp(&ep->ex_fs, &fsb.f_fsid)
!= 0) {
getexp_err(ep, tgrp,
"fsid mismatch");
goto nextline;
@ -2088,8 +2086,7 @@ compare_nmount_exportlist(struct iovec *iov, int iovlen, char *errmsg)
if ((oep->ex_flag & EX_DONE) == 0) {
LOGDEBUG("not done delete=%s", oep->ex_fsdir);
if (statfs(oep->ex_fsdir, &ofs) >= 0 &&
oep->ex_fs.val[0] == ofs.f_fsid.val[0] &&
oep->ex_fs.val[1] == ofs.f_fsid.val[1]) {
fsidcmp(&oep->ex_fs, &ofs.f_fsid) == 0) {
LOGDEBUG("do delete");
/*
* Clear has_publicfh if if was set
@ -2353,8 +2350,7 @@ ex_search(fsid_t *fsid, struct exportlisthead *exhp)
i = EXPHASH(fsid);
SLIST_FOREACH(ep, &exhp[i], entries) {
if (ep->ex_fs.val[0] == fsid->val[0] &&
ep->ex_fs.val[1] == fsid->val[1])
if (fsidcmp(&ep->ex_fs, fsid) == 0)
return (ep);
}
@ -3122,8 +3118,7 @@ do_mount(struct exportlist *ep, struct grouplist *grp, int exflags,
* filesystem.
*/
if (statfs(dirp, &fsb1) != 0 ||
bcmp(&fsb1.f_fsid, &fsb->f_fsid,
sizeof (fsb1.f_fsid)) != 0) {
fsidcmp(&fsb1.f_fsid, &fsb->f_fsid) != 0) {
*cp = savedc;
syslog(LOG_ERR,
"can't export %s %s", dirp,