Annotation of src/sys/fs/msdosfs/msdosfs_denode.c, Revision 1.50.4.3
1.50.4.3! skrll 1: /* $NetBSD: msdosfs_denode.c,v 1.50.4.2 2016/10/05 20:56:01 skrll Exp $ */
1.1 jdolecek 2:
3: /*-
4: * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
5: * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
6: * All rights reserved.
7: * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
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: * 3. All advertising materials mentioning features or use of this software
18: * must display the following acknowledgement:
19: * This product includes software developed by TooLs GmbH.
20: * 4. The name of TooLs GmbH may not be used to endorse or promote products
21: * derived from this software without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26: * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33: */
34: /*
35: * Written by Paul Popelka (paulp@uts.amdahl.com)
36: *
37: * You can do anything you want with this software, just don't say you wrote
38: * it, and don't remove this notice.
39: *
40: * This software is provided "as is".
41: *
42: * The author supplies this software to be publicly redistributed on the
43: * understanding that the author is not responsible for the correct
44: * functioning of this software in any circumstances and is not liable for
45: * any damages caused by this software.
46: *
47: * October 1992
48: */
49:
50: #include <sys/cdefs.h>
1.50.4.3! skrll 51: __KERNEL_RCSID(0, "$NetBSD: msdosfs_denode.c,v 1.50.4.2 2016/10/05 20:56:01 skrll Exp $");
1.1 jdolecek 52:
53: #include <sys/param.h>
54: #include <sys/systm.h>
55: #include <sys/mount.h>
56: #include <sys/malloc.h>
57: #include <sys/pool.h>
58: #include <sys/proc.h>
59: #include <sys/buf.h>
60: #include <sys/vnode.h>
61: #include <sys/kernel.h> /* defines "time" */
62: #include <sys/dirent.h>
63: #include <sys/namei.h>
1.14 elad 64: #include <sys/kauth.h>
1.1 jdolecek 65:
66: #include <uvm/uvm_extern.h>
67:
68: #include <fs/msdosfs/bpb.h>
69: #include <fs/msdosfs/msdosfsmount.h>
70: #include <fs/msdosfs/direntry.h>
71: #include <fs/msdosfs/denode.h>
72: #include <fs/msdosfs/fat.h>
73:
1.21 pooka 74: struct pool msdosfs_denode_pool;
1.1 jdolecek 75:
1.43 hannken 76: struct fh_key {
77: struct msdosfsmount *fhk_mount;
78: uint32_t fhk_dircluster;
79: uint32_t fhk_diroffset;
80: };
81: struct fh_node {
82: struct rb_node fh_rbnode;
83: struct fh_key fh_key;
84: #define fh_mount fh_key.fhk_mount
85: #define fh_dircluster fh_key.fhk_dircluster
86: #define fh_diroffset fh_key.fhk_diroffset
87: uint32_t fh_gen;
88: };
89:
90: static int
91: fh_compare_node_fh(void *ctx, const void *b, const void *key)
92: {
93: const struct fh_node * const pnp = b;
94: const struct fh_key * const fhp = key;
95:
96: /* msdosfs_fh_destroy() below depends on first sorting on fh_mount. */
97: if (pnp->fh_mount != fhp->fhk_mount)
98: return (intptr_t)pnp->fh_mount - (intptr_t)fhp->fhk_mount;
99: if (pnp->fh_dircluster != fhp->fhk_dircluster)
100: return pnp->fh_dircluster - fhp->fhk_dircluster;
101: return pnp->fh_diroffset - fhp->fhk_diroffset;
102: }
103:
104: static int
105: fh_compare_nodes(void *ctx, const void *parent, const void *node)
106: {
107: const struct fh_node * const np = node;
108:
109: return fh_compare_node_fh(ctx, parent, &np->fh_key);
110: }
111:
112: static uint32_t fh_generation;
113: static kmutex_t fh_lock;
114: static struct pool fh_pool;
115: static rb_tree_t fh_rbtree;
116: static const rb_tree_ops_t fh_rbtree_ops = {
117: .rbto_compare_nodes = fh_compare_nodes,
118: .rbto_compare_key = fh_compare_node_fh,
119: .rbto_node_offset = offsetof(struct fh_node, fh_rbnode),
120: .rbto_context = NULL
121: };
122:
1.8 yamt 123: static const struct genfs_ops msdosfs_genfsops = {
124: .gop_size = genfs_size,
125: .gop_alloc = msdosfs_gop_alloc,
126: .gop_write = genfs_gop_write,
1.9 yamt 127: .gop_markupdate = msdosfs_gop_markupdate,
1.1 jdolecek 128: };
129:
1.5 atatat 130: MALLOC_DECLARE(M_MSDOSFSFAT);
131:
1.1 jdolecek 132: void
1.36 cegger 133: msdosfs_init(void)
1.1 jdolecek 134: {
1.21 pooka 135:
1.5 atatat 136: malloc_type_attach(M_MSDOSFSMNT);
137: malloc_type_attach(M_MSDOSFSFAT);
1.23 rumble 138: malloc_type_attach(M_MSDOSFSTMP);
1.7 atatat 139: pool_init(&msdosfs_denode_pool, sizeof(struct denode), 0, 0, 0,
1.20 ad 140: "msdosnopl", &pool_allocator_nointr, IPL_NONE);
1.43 hannken 141: pool_init(&fh_pool, sizeof(struct fh_node), 0, 0, 0,
142: "msdosfhpl", &pool_allocator_nointr, IPL_NONE);
143: rb_tree_init(&fh_rbtree, &fh_rbtree_ops);
144: mutex_init(&fh_lock, MUTEX_DEFAULT, IPL_NONE);
1.1 jdolecek 145: }
146:
147: /*
1.50 hannken 148: * Reinitialize.
1.1 jdolecek 149: */
150:
151: void
1.36 cegger 152: msdosfs_reinit(void)
1.1 jdolecek 153: {
1.50 hannken 154:
1.1 jdolecek 155: }
156:
157: void
1.36 cegger 158: msdosfs_done(void)
1.1 jdolecek 159: {
160: pool_destroy(&msdosfs_denode_pool);
1.43 hannken 161: pool_destroy(&fh_pool);
162: mutex_destroy(&fh_lock);
1.23 rumble 163: malloc_type_detach(M_MSDOSFSTMP);
1.5 atatat 164: malloc_type_detach(M_MSDOSFSFAT);
165: malloc_type_detach(M_MSDOSFSMNT);
1.1 jdolecek 166: }
167:
168: /*
1.50 hannken 169: * If deget() succeeds it returns with the gotten denode unlocked.
1.1 jdolecek 170: *
171: * pmp - address of msdosfsmount structure of the filesystem containing
172: * the denode of interest. The pm_dev field and the address of
173: * the msdosfsmount structure are used.
174: * dirclust - which cluster bp contains, if dirclust is 0 (root directory)
175: * diroffset is relative to the beginning of the root directory,
176: * otherwise it is cluster relative.
177: * diroffset - offset past begin of cluster of denode we want
1.50 hannken 178: * vpp - returns the address of the gotten vnode.
1.1 jdolecek 179: */
180: int
1.50 hannken 181: deget(struct msdosfsmount *pmp, u_long dirclust, u_long diroffset,
182: struct vnode **vpp)
1.35 dsl 183: /* pmp: so we know the maj/min number */
184: /* dirclust: cluster this dir entry came from */
185: /* diroffset: index of entry within the cluster */
1.50 hannken 186: /* vpp: returns the addr of the gotten vnode */
1.1 jdolecek 187: {
188: int error;
1.50 hannken 189: struct denode_key key;
1.1 jdolecek 190:
191: /*
192: * On FAT32 filesystems, root is a (more or less) normal
193: * directory
194: */
195: if (FAT32(pmp) && dirclust == MSDOSFSROOT)
196: dirclust = pmp->pm_rootdirblk;
197:
1.50 hannken 198: memset(&key, 0, sizeof(key));
199: key.dk_dirclust = dirclust;
200: key.dk_diroffset = diroffset;
201: /* key.dk_dirgen = NULL; */
202:
203: error = vcache_get(pmp->pm_mountp, &key, sizeof(key), vpp);
204: return error;
205: }
206:
207: int
208: msdosfs_loadvnode(struct mount *mp, struct vnode *vp,
209: const void *key, size_t key_len, const void **new_key)
210: {
211: bool is_root;
212: int error;
213: extern int (**msdosfs_vnodeop_p)(void *);
214: struct msdosfsmount *pmp;
215: struct direntry *direntptr;
216: struct denode *ldep;
217: struct buf *bp;
218: struct denode_key dkey;
219:
220: KASSERT(key_len == sizeof(dkey));
221: memcpy(&dkey, key, key_len);
222: KASSERT(dkey.dk_dirgen == NULL);
223:
224: pmp = VFSTOMSDOSFS(mp);
225: is_root = ((dkey.dk_dirclust == MSDOSFSROOT ||
226: (FAT32(pmp) && dkey.dk_dirclust == pmp->pm_rootdirblk)) &&
227: dkey.dk_diroffset == MSDOSFSROOT_OFS);
228:
229: #ifdef MSDOSFS_DEBUG
230: printf("loadvnode(pmp %p, dirclust %lu, diroffset %lx, vp %p)\n",
231: pmp, dkey.dk_dirclust, dkey.dk_diroffset, vp);
232: #endif
1.1 jdolecek 233:
234: ldep = pool_get(&msdosfs_denode_pool, PR_WAITOK);
235: memset(ldep, 0, sizeof *ldep);
1.50 hannken 236: /* ldep->de_flag = 0; */
237: /* ldep->de_devvp = 0; */
238: /* ldep->de_lockf = 0; */
1.1 jdolecek 239: ldep->de_dev = pmp->pm_dev;
1.50 hannken 240: ldep->de_dirclust = dkey.dk_dirclust;
241: ldep->de_diroffset = dkey.dk_diroffset;
1.1 jdolecek 242: ldep->de_pmp = pmp;
243: ldep->de_devvp = pmp->pm_devvp;
244: ldep->de_refcnt = 1;
1.50 hannken 245: fc_purge(ldep, 0); /* init the FAT cache for this denode */
246:
1.1 jdolecek 247: /*
248: * Copy the directory entry into the denode area of the vnode.
249: */
1.50 hannken 250: if (is_root) {
1.1 jdolecek 251: /*
252: * Directory entry for the root directory. There isn't one,
253: * so we manufacture one. We should probably rummage
254: * through the root directory and find a label entry (if it
255: * exists), and then use the time and date from that entry
256: * as the time and date for the root denode.
257: */
258: ldep->de_Attributes = ATTR_DIRECTORY;
259: if (FAT32(pmp))
260: ldep->de_StartCluster = pmp->pm_rootdirblk;
261: /* de_FileSize will be filled in further down */
262: else {
263: ldep->de_StartCluster = MSDOSFSROOT;
1.50 hannken 264: ldep->de_FileSize = pmp->pm_rootdirsize *
265: pmp->pm_BytesPerSec;
1.1 jdolecek 266: }
267: /*
268: * fill in time and date so that dos2unixtime() doesn't
269: * spit up when called from msdosfs_getattr() with root
270: * denode
271: */
272: ldep->de_CHun = 0;
273: ldep->de_CTime = 0x0000; /* 00:00:00 */
274: ldep->de_CDate = (0 << DD_YEAR_SHIFT) | (1 << DD_MONTH_SHIFT)
275: | (1 << DD_DAY_SHIFT);
276: /* Jan 1, 1980 */
277: ldep->de_ADate = ldep->de_CDate;
278: ldep->de_MTime = ldep->de_CTime;
279: ldep->de_MDate = ldep->de_CDate;
280: /* leave the other fields as garbage */
281: } else {
1.50 hannken 282: error = readep(pmp, ldep->de_dirclust, ldep->de_diroffset,
283: &bp, &direntptr);
1.24 pooka 284: if (error) {
1.50 hannken 285: pool_put(&msdosfs_denode_pool, ldep);
286: return error;
1.24 pooka 287: }
1.1 jdolecek 288: DE_INTERNALIZE(ldep, direntptr);
1.25 ad 289: brelse(bp, 0);
1.1 jdolecek 290: }
291:
292: /*
293: * Fill in a few fields of the vnode and finish filling in the
1.50 hannken 294: * denode.
1.1 jdolecek 295: */
296: if (ldep->de_Attributes & ATTR_DIRECTORY) {
297: /*
298: * Since DOS directory entries that describe directories
299: * have 0 in the filesize field, we take this opportunity
300: * to find out the length of the directory and plug it into
301: * the denode structure.
302: */
303: u_long size;
304:
1.50 hannken 305: vp->v_type = VDIR;
1.1 jdolecek 306: if (ldep->de_StartCluster != MSDOSFSROOT) {
307: error = pcbmap(ldep, CLUST_END, 0, &size, 0);
308: if (error == E2BIG) {
309: ldep->de_FileSize = de_cn2off(pmp, size);
310: error = 0;
311: } else
1.50 hannken 312: printf("loadvnode(): pcbmap returned %d\n",
313: error);
1.1 jdolecek 314: }
315: } else
1.50 hannken 316: vp->v_type = VREG;
1.37 pooka 317: vref(ldep->de_devvp);
1.50 hannken 318: if (is_root)
319: vp->v_vflag |= VV_ROOT;
320: vp->v_tag = VT_MSDOSFS;
321: vp->v_op = msdosfs_vnodeop_p;
322: vp->v_data = ldep;
323: ldep->de_vnode = vp;
324: genfs_node_init(vp, &msdosfs_genfsops);
325: uvm_vnp_setsize(vp, ldep->de_FileSize);
326: *new_key = &ldep->de_key;
327:
328: return 0;
1.1 jdolecek 329: }
330:
331: int
1.34 dsl 332: deupdat(struct denode *dep, int waitfor)
1.1 jdolecek 333: {
334:
1.11 yamt 335: return (msdosfs_update(DETOV(dep), NULL, NULL,
336: waitfor ? UPDATE_WAIT : 0));
1.1 jdolecek 337: }
338:
339: /*
340: * Truncate the file described by dep to the length specified by length.
341: */
342: int
1.27 pooka 343: detrunc(struct denode *dep, u_long length, int flags, kauth_cred_t cred)
1.1 jdolecek 344: {
345: int error;
346: int allerror;
347: u_long eofentry;
1.13 christos 348: u_long chaintofree = 0;
1.1 jdolecek 349: daddr_t bn, lastblock;
350: int boff;
351: int isadir = dep->de_Attributes & ATTR_DIRECTORY;
352: struct buf *bp;
353: struct msdosfsmount *pmp = dep->de_pmp;
354:
355: #ifdef MSDOSFS_DEBUG
356: printf("detrunc(): file %s, length %lu, flags %x\n", dep->de_Name, length, flags);
357: #endif
358:
359: /*
360: * Disallow attempts to truncate the root directory since it is of
361: * fixed size. That's just the way dos filesystems are. We use
362: * the VROOT bit in the vnode because checking for the directory
363: * bit and a startcluster of 0 in the denode is not adequate to
364: * recognize the root directory at this point in a file or
365: * directory's life.
366: */
1.26 ad 367: if ((DETOV(dep)->v_vflag & VV_ROOT) && !FAT32(pmp)) {
1.1 jdolecek 368: printf("detrunc(): can't truncate root directory, clust %ld, offset %ld\n",
369: dep->de_dirclust, dep->de_diroffset);
370: return (EINVAL);
371: }
372:
373: uvm_vnp_setsize(DETOV(dep), length);
374:
375: if (dep->de_FileSize < length)
376: return (deextend(dep, length, cred));
377: lastblock = de_clcount(pmp, length) - 1;
378:
379: /*
380: * If the desired length is 0 then remember the starting cluster of
381: * the file and set the StartCluster field in the directory entry
382: * to 0. If the desired length is not zero, then get the number of
383: * the last cluster in the shortened file. Then get the number of
384: * the first cluster in the part of the file that is to be freed.
385: * Then set the next cluster pointer in the last cluster of the
386: * file to CLUST_EOFE.
387: */
388: if (length == 0) {
389: chaintofree = dep->de_StartCluster;
390: dep->de_StartCluster = 0;
391: eofentry = ~0;
392: } else {
393: error = pcbmap(dep, lastblock, 0, &eofentry, 0);
394: if (error) {
395: #ifdef MSDOSFS_DEBUG
396: printf("detrunc(): pcbmap fails %d\n", error);
397: #endif
398: return (error);
399: }
400: }
401:
402: /*
403: * If the new length is not a multiple of the cluster size then we
404: * must zero the tail end of the new last cluster in case it
405: * becomes part of the file again because of a seek.
406: */
407: if ((boff = length & pmp->pm_crbomask) != 0) {
408: if (isadir) {
409: bn = cntobn(pmp, eofentry);
1.17 scw 410: error = bread(pmp->pm_devvp, de_bn2kb(pmp, bn),
1.50.4.1 skrll 411: pmp->pm_bpcluster, B_MODIFY, &bp);
1.1 jdolecek 412: if (error) {
413: #ifdef MSDOSFS_DEBUG
414: printf("detrunc(): bread fails %d\n", error);
415: #endif
416: return (error);
417: }
1.19 christos 418: memset((char *)bp->b_data + boff, 0,
419: pmp->pm_bpcluster - boff);
1.1 jdolecek 420: if (flags & IO_SYNC)
421: bwrite(bp);
422: else
423: bdwrite(bp);
424: } else {
1.46 hannken 425: ubc_zerorange(&DETOV(dep)->v_uobj, length,
426: pmp->pm_bpcluster - boff,
427: UBC_UNMAP_FLAG(DETOV(dep)));
1.1 jdolecek 428: }
429: }
430:
431: /*
432: * Write out the updated directory entry. Even if the update fails
433: * we free the trailing clusters.
434: */
435: dep->de_FileSize = length;
436: if (!isadir)
437: dep->de_flag |= DE_UPDATE|DE_MODIFIED;
438: vtruncbuf(DETOV(dep), lastblock + 1, 0, 0);
439: allerror = deupdat(dep, 1);
440: #ifdef MSDOSFS_DEBUG
441: printf("detrunc(): allerror %d, eofentry %lu\n",
442: allerror, eofentry);
443: #endif
444:
1.42 hannken 445: fc_purge(dep, lastblock + 1);
446:
1.1 jdolecek 447: /*
448: * If we need to break the cluster chain for the file then do it
449: * now.
450: */
451: if (eofentry != ~0) {
452: error = fatentry(FAT_GET_AND_SET, pmp, eofentry,
453: &chaintofree, CLUST_EOFE);
454: if (error) {
455: #ifdef MSDOSFS_DEBUG
456: printf("detrunc(): fatentry errors %d\n", error);
457: #endif
458: return (error);
459: }
460: fc_setcache(dep, FC_LASTFC, de_cluster(pmp, length - 1),
461: eofentry);
462: }
463:
464: /*
465: * Now free the clusters removed from the file because of the
466: * truncation.
467: */
468: if (chaintofree != 0 && !MSDOSFSEOF(chaintofree, pmp->pm_fatmask))
469: freeclusterchain(pmp, chaintofree);
470:
471: return (allerror);
472: }
473:
474: /*
475: * Extend the file described by dep to length specified by length.
476: */
477: int
1.34 dsl 478: deextend(struct denode *dep, u_long length, kauth_cred_t cred)
1.1 jdolecek 479: {
480: struct msdosfsmount *pmp = dep->de_pmp;
481: u_long count, osize;
482: int error;
483:
484: /*
485: * The root of a DOS filesystem cannot be extended.
486: */
1.26 ad 487: if ((DETOV(dep)->v_vflag & VV_ROOT) && !FAT32(pmp))
1.1 jdolecek 488: return (EINVAL);
489:
490: /*
491: * Directories cannot be extended.
492: */
493: if (dep->de_Attributes & ATTR_DIRECTORY)
494: return (EISDIR);
495:
496: if (length <= dep->de_FileSize)
497: panic("deextend: file too large");
498:
499: /*
500: * Compute the number of clusters to allocate.
501: */
502: count = de_clcount(pmp, length) - de_clcount(pmp, dep->de_FileSize);
503: if (count > 0) {
504: if (count > pmp->pm_freeclustercount)
505: return (ENOSPC);
506: error = extendfile(dep, count, NULL, NULL, DE_CLEAR);
507: if (error) {
508: /* truncate the added clusters away again */
1.27 pooka 509: (void) detrunc(dep, dep->de_FileSize, 0, cred);
1.1 jdolecek 510: return (error);
511: }
512: }
513:
1.29 reinoud 514: /*
1.46 hannken 515: * Zero extend file range; ubc_zerorange() uses ubc_alloc() and a
1.29 reinoud 516: * memset(); we set the write size so ubc won't read in file data that
517: * is zero'd later.
518: */
1.1 jdolecek 519: osize = dep->de_FileSize;
520: dep->de_FileSize = length;
1.29 reinoud 521: uvm_vnp_setwritesize(DETOV(dep), (voff_t)dep->de_FileSize);
1.1 jdolecek 522: dep->de_flag |= DE_UPDATE|DE_MODIFIED;
1.46 hannken 523: ubc_zerorange(&DETOV(dep)->v_uobj, (off_t)osize,
524: (size_t)(round_page(dep->de_FileSize) - osize),
525: UBC_UNMAP_FLAG(DETOV(dep)));
1.29 reinoud 526: uvm_vnp_setsize(DETOV(dep), (voff_t)dep->de_FileSize);
1.1 jdolecek 527: return (deupdat(dep, 1));
528: }
529:
530: int
1.34 dsl 531: msdosfs_reclaim(void *v)
1.1 jdolecek 532: {
1.50.4.3! skrll 533: struct vop_reclaim_v2_args /* {
1.1 jdolecek 534: struct vnode *a_vp;
535: } */ *ap = v;
536: struct vnode *vp = ap->a_vp;
537: struct denode *dep = VTODE(vp);
538:
1.50.4.3! skrll 539: VOP_UNLOCK(vp);
! 540:
1.1 jdolecek 541: #ifdef MSDOSFS_DEBUG
542: printf("msdosfs_reclaim(): dep %p, file %s, refcnt %ld\n",
543: dep, dep->de_Name, dep->de_refcnt);
544: #endif
545:
546: /*
547: * Purge old data structures associated with the denode.
548: */
549: if (dep->de_devvp) {
550: vrele(dep->de_devvp);
551: dep->de_devvp = 0;
552: }
553: #if 0 /* XXX */
554: dep->de_flag = 0;
555: #endif
1.49 hannken 556: /*
557: * To interlock with msdosfs_sync().
558: */
1.18 ad 559: genfs_node_destroy(vp);
1.49 hannken 560: mutex_enter(vp->v_interlock);
561: vp->v_data = NULL;
562: mutex_exit(vp->v_interlock);
1.1 jdolecek 563: pool_put(&msdosfs_denode_pool, dep);
564: return (0);
565: }
566:
567: int
1.34 dsl 568: msdosfs_inactive(void *v)
1.1 jdolecek 569: {
1.50.4.3! skrll 570: struct vop_inactive_v2_args /* {
1.1 jdolecek 571: struct vnode *a_vp;
1.30 ad 572: bool *a_recycle;
1.1 jdolecek 573: } */ *ap = v;
574: struct vnode *vp = ap->a_vp;
575: struct denode *dep = VTODE(vp);
576: int error = 0;
577:
578: #ifdef MSDOSFS_DEBUG
579: printf("msdosfs_inactive(): dep %p, de_Name[0] %x\n", dep, dep->de_Name[0]);
580: #endif
581:
582: /*
583: * Get rid of denodes related to stale file handles.
584: */
585: if (dep->de_Name[0] == SLOT_DELETED)
586: goto out;
587:
588: /*
589: * If the file has been deleted and it is on a read/write
590: * filesystem, then truncate the file, and mark the directory slot
591: * as empty. (This may not be necessary for the dos filesystem.)
592: */
593: #ifdef MSDOSFS_DEBUG
594: printf("msdosfs_inactive(): dep %p, refcnt %ld, mntflag %x %s\n",
595: dep, dep->de_refcnt, vp->v_mount->mnt_flag,
596: (vp->v_mount->mnt_flag & MNT_RDONLY) ? "MNT_RDONLY" : "");
597: #endif
598: if (dep->de_refcnt <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
599: if (dep->de_FileSize != 0) {
1.27 pooka 600: error = detrunc(dep, (u_long)0, 0, NOCRED);
1.1 jdolecek 601: }
602: dep->de_Name[0] = SLOT_DELETED;
1.43 hannken 603: msdosfs_fh_remove(dep->de_pmp,
604: dep->de_dirclust, dep->de_diroffset);
1.1 jdolecek 605: }
606: deupdat(dep, 0);
607: out:
608: /*
609: * If we are done with the denode, reclaim it
610: * so that it can be reused immediately.
611: */
612: #ifdef MSDOSFS_DEBUG
613: printf("msdosfs_inactive(): v_usecount %d, de_Name[0] %x\n",
614: vp->v_usecount, dep->de_Name[0]);
615: #endif
1.30 ad 616: *ap->a_recycle = (dep->de_Name[0] == SLOT_DELETED);
1.50.4.3! skrll 617:
1.1 jdolecek 618: return (error);
619: }
620:
621: int
1.16 christos 622: msdosfs_gop_alloc(struct vnode *vp, off_t off,
623: off_t len, int flags, kauth_cred_t cred)
1.1 jdolecek 624: {
625: return 0;
626: }
1.9 yamt 627:
628: void
629: msdosfs_gop_markupdate(struct vnode *vp, int flags)
630: {
631: u_long mask = 0;
632:
633: if ((flags & GOP_UPDATE_ACCESSED) != 0) {
634: mask = DE_ACCESS;
635: }
636: if ((flags & GOP_UPDATE_MODIFIED) != 0) {
637: mask |= DE_UPDATE;
638: }
639: if (mask) {
640: struct denode *dep = VTODE(vp);
641:
642: dep->de_flag |= mask;
643: }
644: }
1.43 hannken 645:
646: int
647: msdosfs_fh_enter(struct msdosfsmount *pmp,
648: uint32_t dircluster, uint32_t diroffset, uint32_t *genp)
649: {
650: struct fh_key fhkey;
651: struct fh_node *fhp;
652:
653: fhkey.fhk_mount = pmp;
654: fhkey.fhk_dircluster = dircluster;
655: fhkey.fhk_diroffset = diroffset;
656:
657: mutex_enter(&fh_lock);
658: fhp = rb_tree_find_node(&fh_rbtree, &fhkey);
659: if (fhp == NULL) {
660: mutex_exit(&fh_lock);
661: fhp = pool_get(&fh_pool, PR_WAITOK);
662: mutex_enter(&fh_lock);
663: fhp->fh_key = fhkey;
664: fhp->fh_gen = fh_generation++;
665: rb_tree_insert_node(&fh_rbtree, fhp);
666: }
667: *genp = fhp->fh_gen;
668: mutex_exit(&fh_lock);
669: return 0;
670: }
671:
672: int
673: msdosfs_fh_remove(struct msdosfsmount *pmp,
674: uint32_t dircluster, uint32_t diroffset)
675: {
676: struct fh_key fhkey;
677: struct fh_node *fhp;
678:
679: fhkey.fhk_mount = pmp;
680: fhkey.fhk_dircluster = dircluster;
681: fhkey.fhk_diroffset = diroffset;
682:
683: mutex_enter(&fh_lock);
684: fhp = rb_tree_find_node(&fh_rbtree, &fhkey);
685: if (fhp == NULL) {
686: mutex_exit(&fh_lock);
687: return ENOENT;
688: }
689: rb_tree_remove_node(&fh_rbtree, fhp);
690: mutex_exit(&fh_lock);
691: pool_put(&fh_pool, fhp);
692: return 0;
693: }
694:
695: int
696: msdosfs_fh_lookup(struct msdosfsmount *pmp,
697: uint32_t dircluster, uint32_t diroffset, uint32_t *genp)
698: {
699: struct fh_key fhkey;
700: struct fh_node *fhp;
701:
702: fhkey.fhk_mount = pmp;
703: fhkey.fhk_dircluster = dircluster;
704: fhkey.fhk_diroffset = diroffset;
705:
706: mutex_enter(&fh_lock);
707: fhp = rb_tree_find_node(&fh_rbtree, &fhkey);
708: if (fhp == NULL) {
709: mutex_exit(&fh_lock);
710: return ESTALE;
711: }
712: *genp = fhp->fh_gen;
713: mutex_exit(&fh_lock);
714: return 0;
715: }
716:
717: void
718: msdosfs_fh_destroy(struct msdosfsmount *pmp)
719: {
720: struct fh_key fhkey;
721: struct fh_node *fhp, *nfhp;
722:
723: fhkey.fhk_mount = pmp;
724: fhkey.fhk_dircluster = 0;
725: fhkey.fhk_diroffset = 0;
726:
727: mutex_enter(&fh_lock);
728: for (fhp = rb_tree_find_node_geq(&fh_rbtree, &fhkey);
729: fhp != NULL && fhp->fh_mount == pmp; fhp = nfhp) {
730: nfhp = rb_tree_iterate(&fh_rbtree, fhp, RB_DIR_RIGHT);
731: rb_tree_remove_node(&fh_rbtree, fhp);
732: pool_put(&fh_pool, fhp);
733: }
734: #ifdef DIAGNOSTIC
735: RB_TREE_FOREACH(fhp, &fh_rbtree) {
736: KASSERT(fhp->fh_mount != pmp);
737: }
738: #endif
739: mutex_exit(&fh_lock);
740: }
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