Annotation of src/sys/fs/puffs/puffs_subr.c, Revision 1.13.2.5
1.13.2.5! yamt 1: /* $NetBSD: puffs_subr.c,v 1.13.2.4 2007/10/27 11:35:11 yamt Exp $ */
1.13.2.2 yamt 2:
3: /*
1.13.2.5! yamt 4: * Copyright (c) 2006, 2007 Antti Kantee. All Rights Reserved.
1.13.2.2 yamt 5: *
6: * Development of this software was supported by the
1.13.2.5! yamt 7: * Ulla Tuominen Foundation and the Finnish Cultural Foundation.
1.13.2.2 yamt 8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
19: * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28: * SUCH DAMAGE.
29: */
30:
31: #include <sys/cdefs.h>
1.13.2.5! yamt 32: __KERNEL_RCSID(0, "$NetBSD: puffs_subr.c,v 1.13.2.4 2007/10/27 11:35:11 yamt Exp $");
1.13.2.2 yamt 33:
34: #include <sys/param.h>
35: #include <sys/malloc.h>
36: #include <sys/mount.h>
1.13.2.4 yamt 37: #include <sys/namei.h>
38: #include <sys/poll.h>
39: #include <sys/proc.h>
1.13.2.2 yamt 40:
41: #include <fs/puffs/puffs_msgif.h>
42: #include <fs/puffs/puffs_sys.h>
43:
1.13.2.3 yamt 44: #ifdef PUFFSDEBUG
1.13.2.2 yamt 45: int puffsdebug;
46: #endif
47:
48: void
1.13.2.4 yamt 49: puffs_makecn(struct puffs_kcn *pkcn, struct puffs_kcred *pkcr,
50: struct puffs_kcid *pkcid, const struct componentname *cn, int full)
1.13.2.2 yamt 51: {
52:
53: pkcn->pkcn_nameiop = cn->cn_nameiop;
54: pkcn->pkcn_flags = cn->cn_flags;
1.13.2.4 yamt 55: puffs_cidcvt(pkcid, cn->cn_lwp);
1.13.2.2 yamt 56:
1.13.2.4 yamt 57: if (full) {
58: (void)strcpy(pkcn->pkcn_name, cn->cn_nameptr);
59: } else {
60: (void)memcpy(pkcn->pkcn_name, cn->cn_nameptr, cn->cn_namelen);
61: pkcn->pkcn_name[cn->cn_namelen] = '\0';
62: }
1.13.2.2 yamt 63: pkcn->pkcn_namelen = cn->cn_namelen;
1.13.2.4 yamt 64: pkcn->pkcn_consume = 0;
65:
66: puffs_credcvt(pkcr, cn->cn_cred);
1.13.2.2 yamt 67: }
68:
69: /*
1.13.2.4 yamt 70: * Convert given credentials to struct puffs_kcred for userspace.
1.13.2.2 yamt 71: */
72: void
1.13.2.4 yamt 73: puffs_credcvt(struct puffs_kcred *pkcr, const kauth_cred_t cred)
1.13.2.2 yamt 74: {
75:
1.13.2.4 yamt 76: memset(pkcr, 0, sizeof(struct puffs_kcred));
1.13.2.2 yamt 77:
78: if (cred == NOCRED || cred == FSCRED) {
1.13.2.4 yamt 79: pkcr->pkcr_type = PUFFCRED_TYPE_INTERNAL;
1.13.2.2 yamt 80: if (cred == NOCRED)
1.13.2.4 yamt 81: pkcr->pkcr_internal = PUFFCRED_CRED_NOCRED;
1.13.2.2 yamt 82: if (cred == FSCRED)
1.13.2.4 yamt 83: pkcr->pkcr_internal = PUFFCRED_CRED_FSCRED;
1.13.2.2 yamt 84: } else {
1.13.2.4 yamt 85: pkcr->pkcr_type = PUFFCRED_TYPE_UUC;
86: kauth_cred_to_uucred(&pkcr->pkcr_uuc, cred);
1.13.2.2 yamt 87: }
88: }
89:
1.13.2.4 yamt 90: void
91: puffs_cidcvt(struct puffs_kcid *pkcid, const struct lwp *l)
1.13.2.2 yamt 92: {
93:
1.13.2.4 yamt 94: if (l) {
95: pkcid->pkcid_type = PUFFCID_TYPE_REAL;
96: pkcid->pkcid_pid = l->l_proc->p_pid;
97: pkcid->pkcid_lwpid = l->l_lid;
98: } else {
99: pkcid->pkcid_type = PUFFCID_TYPE_FAKE;
100: pkcid->pkcid_pid = 0;
101: pkcid->pkcid_lwpid = 0;
102: }
1.13.2.2 yamt 103: }
104:
105: void
1.13.2.5! yamt 106: puffs_parkdone_asyncbioread(struct puffs_mount *pmp,
! 107: struct puffs_req *preq, void *arg)
1.13.2.2 yamt 108: {
1.13.2.5! yamt 109: struct puffs_vnmsg_read *read_msg = (void *)preq;
1.13.2.4 yamt 110: struct buf *bp = arg;
111: size_t moved;
112:
1.13.2.5! yamt 113: bp->b_error = checkerr(pmp, preq->preq_rv, __func__);
1.13.2.4 yamt 114: if (bp->b_error == 0) {
1.13.2.5! yamt 115: moved = bp->b_bcount - read_msg->pvnr_resid;
! 116: bp->b_resid = read_msg->pvnr_resid;
1.13.2.2 yamt 117:
1.13.2.5! yamt 118: memcpy(bp->b_data, read_msg->pvnr_data, moved);
1.13.2.2 yamt 119: }
120:
1.13.2.4 yamt 121: biodone(bp);
122: }
123:
124: /* XXX: userspace can leak kernel resources */
125: void
1.13.2.5! yamt 126: puffs_parkdone_poll(struct puffs_mount *pmp, struct puffs_req *preq, void *arg)
1.13.2.4 yamt 127: {
1.13.2.5! yamt 128: struct puffs_vnmsg_poll *poll_msg = (void *)preq;
1.13.2.4 yamt 129: struct puffs_node *pn = arg;
1.13.2.5! yamt 130: int revents, error;
1.13.2.4 yamt 131:
1.13.2.5! yamt 132: error = checkerr(pmp, preq->preq_rv, __func__);
! 133: if (error)
! 134: revents = poll_msg->pvnr_events;
1.13.2.4 yamt 135: else
136: revents = POLLERR;
137:
138: mutex_enter(&pn->pn_mtx);
139: pn->pn_revents |= revents;
140: mutex_exit(&pn->pn_mtx);
141:
142: selnotify(&pn->pn_sel, 0);
143:
144: puffs_releasenode(pn);
145: }
146:
147: void
148: puffs_mp_reference(struct puffs_mount *pmp)
149: {
150:
151: KASSERT(mutex_owned(&pmp->pmp_lock));
152: pmp->pmp_refcount++;
153: }
154:
155: void
156: puffs_mp_release(struct puffs_mount *pmp)
157: {
158:
159: KASSERT(mutex_owned(&pmp->pmp_lock));
160: if (--pmp->pmp_refcount == 0)
161: cv_broadcast(&pmp->pmp_refcount_cv);
1.13.2.2 yamt 162: }
1.13.2.5! yamt 163:
! 164: void
! 165: puffs_gop_size(struct vnode *vp, off_t size, off_t *eobp,
! 166: int flags)
! 167: {
! 168:
! 169: *eobp = size;
! 170: }
! 171:
! 172: void
! 173: puffs_gop_markupdate(struct vnode *vp, int flags)
! 174: {
! 175: int uflags = 0;
! 176:
! 177: if (flags & GOP_UPDATE_ACCESSED)
! 178: uflags |= PUFFS_UPDATEATIME;
! 179: if (flags & GOP_UPDATE_MODIFIED)
! 180: uflags |= PUFFS_UPDATEMTIME;
! 181:
! 182: puffs_updatenode(vp, uflags);
! 183: }
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