Annotation of src/sys/fs/puffs/puffs_subr.c, Revision 1.44.2.3
1.44.2.3! joerg 1: /* $NetBSD: puffs_subr.c,v 1.44.2.2 2007/10/26 15:48:19 joerg Exp $ */
1.1 pooka 2:
3: /*
1.44.2.1 joerg 4: * Copyright (c) 2006, 2007 Antti Kantee. All Rights Reserved.
1.1 pooka 5: *
6: * Development of this software was supported by the
1.44.2.1 joerg 7: * Ulla Tuominen Foundation and the Finnish Cultural Foundation.
1.1 pooka 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>
1.44.2.3! joerg 32: __KERNEL_RCSID(0, "$NetBSD: puffs_subr.c,v 1.44.2.2 2007/10/26 15:48:19 joerg Exp $");
1.1 pooka 33:
34: #include <sys/param.h>
35: #include <sys/malloc.h>
36: #include <sys/mount.h>
1.31 pooka 37: #include <sys/namei.h>
38: #include <sys/poll.h>
1.44.2.2 joerg 39: #include <sys/proc.h>
1.1 pooka 40:
41: #include <fs/puffs/puffs_msgif.h>
42: #include <fs/puffs/puffs_sys.h>
43:
1.19 pooka 44: #ifdef PUFFSDEBUG
1.10 pooka 45: int puffsdebug;
46: #endif
47:
1.1 pooka 48: void
1.36 pooka 49: puffs_makecn(struct puffs_kcn *pkcn, struct puffs_kcred *pkcr,
1.38 pooka 50: struct puffs_kcid *pkcid, const struct componentname *cn, int full)
1.1 pooka 51: {
52:
1.12 pooka 53: pkcn->pkcn_nameiop = cn->cn_nameiop;
54: pkcn->pkcn_flags = cn->cn_flags;
1.37 pooka 55: puffs_cidcvt(pkcid, cn->cn_lwp);
1.1 pooka 56:
1.38 pooka 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: }
1.12 pooka 63: pkcn->pkcn_namelen = cn->cn_namelen;
1.38 pooka 64: pkcn->pkcn_consume = 0;
1.36 pooka 65:
66: puffs_credcvt(pkcr, cn->cn_cred);
1.1 pooka 67: }
68:
69: /*
1.36 pooka 70: * Convert given credentials to struct puffs_kcred for userspace.
1.1 pooka 71: */
72: void
1.36 pooka 73: puffs_credcvt(struct puffs_kcred *pkcr, const kauth_cred_t cred)
1.1 pooka 74: {
75:
1.36 pooka 76: memset(pkcr, 0, sizeof(struct puffs_kcred));
1.1 pooka 77:
78: if (cred == NOCRED || cred == FSCRED) {
1.36 pooka 79: pkcr->pkcr_type = PUFFCRED_TYPE_INTERNAL;
1.1 pooka 80: if (cred == NOCRED)
1.36 pooka 81: pkcr->pkcr_internal = PUFFCRED_CRED_NOCRED;
1.1 pooka 82: if (cred == FSCRED)
1.36 pooka 83: pkcr->pkcr_internal = PUFFCRED_CRED_FSCRED;
1.1 pooka 84: } else {
1.36 pooka 85: pkcr->pkcr_type = PUFFCRED_TYPE_UUC;
86: kauth_cred_to_uucred(&pkcr->pkcr_uuc, cred);
1.1 pooka 87: }
88: }
89:
1.37 pooka 90: void
91: puffs_cidcvt(struct puffs_kcid *pkcid, const struct lwp *l)
1.1 pooka 92: {
93:
1.37 pooka 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: }
1.1 pooka 103: }
1.7 pooka 104:
105: void
1.44.2.1 joerg 106: puffs_parkdone_asyncbioread(struct puffs_mount *pmp,
107: struct puffs_req *preq, void *arg)
1.27 pooka 108: {
1.44.2.2 joerg 109: struct puffs_vnmsg_read *read_msg = (void *)preq;
1.27 pooka 110: struct buf *bp = arg;
111: size_t moved;
112:
1.44.2.3! joerg 113: DPRINTF(("%s\n", __func__));
! 114:
1.44.2.1 joerg 115: bp->b_error = checkerr(pmp, preq->preq_rv, __func__);
1.27 pooka 116: if (bp->b_error == 0) {
1.44.2.3! joerg 117: if (read_msg->pvnr_resid > bp->b_bcount) {
! 118: puffs_senderr(pmp, PUFFS_ERR_READ, E2BIG,
! 119: "resid grew", preq->preq_cookie);
! 120: bp->b_error = E2BIG;
! 121: } else {
! 122: moved = bp->b_bcount - read_msg->pvnr_resid;
! 123: bp->b_resid = read_msg->pvnr_resid;
1.27 pooka 124:
1.44.2.3! joerg 125: memcpy(bp->b_data, read_msg->pvnr_data, moved);
! 126: }
! 127: }
! 128:
! 129: biodone(bp);
! 130: }
! 131:
! 132: void
! 133: puffs_parkdone_asyncbiowrite(struct puffs_mount *pmp,
! 134: struct puffs_req *preq, void *arg)
! 135: {
! 136: struct puffs_vnmsg_write *write_msg = (void *)preq;
! 137: struct buf *bp = arg;
! 138:
! 139: DPRINTF(("%s\n", __func__));
! 140:
! 141: bp->b_error = checkerr(pmp, preq->preq_rv, __func__);
! 142: if (bp->b_error == 0) {
! 143: if (write_msg->pvnr_resid > bp->b_bcount) {
! 144: puffs_senderr(pmp, PUFFS_ERR_WRITE, E2BIG,
! 145: "resid grew", preq->preq_cookie);
! 146: bp->b_error = E2BIG;
! 147: } else {
! 148: bp->b_resid = write_msg->pvnr_resid;
! 149: }
1.27 pooka 150: }
151:
152: biodone(bp);
153: }
1.28 pooka 154:
1.44 pooka 155: /* XXX: userspace can leak kernel resources */
1.28 pooka 156: void
1.44.2.1 joerg 157: puffs_parkdone_poll(struct puffs_mount *pmp, struct puffs_req *preq, void *arg)
1.31 pooka 158: {
1.44.2.2 joerg 159: struct puffs_vnmsg_poll *poll_msg = (void *)preq;
1.31 pooka 160: struct puffs_node *pn = arg;
1.44.2.1 joerg 161: int revents, error;
1.31 pooka 162:
1.44.2.1 joerg 163: error = checkerr(pmp, preq->preq_rv, __func__);
164: if (error)
1.44.2.2 joerg 165: revents = poll_msg->pvnr_events;
1.31 pooka 166: else
167: revents = POLLERR;
168:
169: mutex_enter(&pn->pn_mtx);
170: pn->pn_revents |= revents;
171: mutex_exit(&pn->pn_mtx);
172:
173: selnotify(&pn->pn_sel, 0);
174:
175: puffs_releasenode(pn);
176: }
177:
178: void
1.28 pooka 179: puffs_mp_reference(struct puffs_mount *pmp)
180: {
181:
182: KASSERT(mutex_owned(&pmp->pmp_lock));
183: pmp->pmp_refcount++;
184: }
185:
186: void
187: puffs_mp_release(struct puffs_mount *pmp)
188: {
189:
190: KASSERT(mutex_owned(&pmp->pmp_lock));
191: if (--pmp->pmp_refcount == 0)
192: cv_broadcast(&pmp->pmp_refcount_cv);
193: }
1.44.2.1 joerg 194:
195: void
196: puffs_gop_size(struct vnode *vp, off_t size, off_t *eobp,
197: int flags)
198: {
199:
200: *eobp = size;
201: }
202:
203: void
204: puffs_gop_markupdate(struct vnode *vp, int flags)
205: {
206: int uflags = 0;
207:
208: if (flags & GOP_UPDATE_ACCESSED)
209: uflags |= PUFFS_UPDATEATIME;
210: if (flags & GOP_UPDATE_MODIFIED)
211: uflags |= PUFFS_UPDATEMTIME;
212:
1.44.2.3! joerg 213: puffs_updatenode(VPTOPP(vp), uflags, 0);
! 214: }
! 215:
! 216: void
! 217: puffs_senderr(struct puffs_mount *pmp, int type, int error,
! 218: const char *str, void *cookie)
! 219: {
! 220: struct puffs_msgpark *park;
! 221: struct puffs_error *perr;
! 222:
! 223: puffs_msgmem_alloc(sizeof(struct puffs_error), &park, (void**)&perr, 1);
! 224: puffs_msg_setfaf(park);
! 225: puffs_msg_setinfo(park, PUFFSOP_ERROR, type, cookie);
! 226:
! 227: perr->perr_error = error;
! 228: strlcpy(perr->perr_str, str, sizeof(perr->perr_str));
! 229:
! 230: puffs_msg_enqueue(pmp, park);
! 231: puffs_msgmem_release(park);
1.44.2.1 joerg 232: }
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