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652ecc20 KK |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
aa98d7cf | 3 | * |
652ecc20 | 4 | * Copyright (C) 2006 NEC Corporation |
aa98d7cf | 5 | * |
652ecc20 KK |
6 | * Created by KaiGai Kohei <kaigai@ak.jp.nec.com> |
7 | * | |
8 | * For licensing information, see the file 'LICENCE' in this directory. | |
9 | * | |
10 | */ | |
aa98d7cf KK |
11 | #include <linux/kernel.h> |
12 | #include <linux/slab.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/time.h> | |
15 | #include <linux/pagemap.h> | |
16 | #include <linux/highmem.h> | |
17 | #include <linux/crc32.h> | |
18 | #include <linux/jffs2.h> | |
19 | #include <linux/xattr.h> | |
20 | #include <linux/mtd/mtd.h> | |
21 | #include "nodelist.h" | |
22 | /* -------- xdatum related functions ---------------- | |
23 | * xattr_datum_hashkey(xprefix, xname, xvalue, xsize) | |
24 | * is used to calcurate xdatum hashkey. The reminder of hashkey into XATTRINDEX_HASHSIZE is | |
25 | * the index of the xattr name/value pair cache (c->xattrindex). | |
c9f700f8 KK |
26 | * is_xattr_datum_unchecked(c, xd) |
27 | * returns 1, if xdatum contains any unchecked raw nodes. if all raw nodes are not | |
28 | * unchecked, it returns 0. | |
aa98d7cf KK |
29 | * unload_xattr_datum(c, xd) |
30 | * is used to release xattr name/value pair and detach from c->xattrindex. | |
31 | * reclaim_xattr_datum(c) | |
32 | * is used to reclaim xattr name/value pairs on the xattr name/value pair cache when | |
33 | * memory usage by cache is over c->xdatum_mem_threshold. Currentry, this threshold | |
34 | * is hard coded as 32KiB. | |
aa98d7cf KK |
35 | * do_verify_xattr_datum(c, xd) |
36 | * is used to load the xdatum informations without name/value pair from the medium. | |
37 | * It's necessary once, because those informations are not collected during mounting | |
38 | * process when EBS is enabled. | |
39 | * 0 will be returned, if success. An negative return value means recoverable error, and | |
40 | * positive return value means unrecoverable error. Thus, caller must remove this xdatum | |
41 | * and xref when it returned positive value. | |
42 | * do_load_xattr_datum(c, xd) | |
43 | * is used to load name/value pair from the medium. | |
44 | * The meanings of return value is same as do_verify_xattr_datum(). | |
45 | * load_xattr_datum(c, xd) | |
46 | * is used to be as a wrapper of do_verify_xattr_datum() and do_load_xattr_datum(). | |
47 | * If xd need to call do_verify_xattr_datum() at first, it's called before calling | |
48 | * do_load_xattr_datum(). The meanings of return value is same as do_verify_xattr_datum(). | |
9fe4854c | 49 | * save_xattr_datum(c, xd) |
aa98d7cf | 50 | * is used to write xdatum to medium. xd->version will be incremented. |
9fe4854c | 51 | * create_xattr_datum(c, xprefix, xname, xvalue, xsize) |
aa98d7cf | 52 | * is used to create new xdatum and write to medium. |
c9f700f8 | 53 | * delete_xattr_datum(c, xd) |
8a13695c KK |
54 | * is used to delete a xdatum. It marks xd JFFS2_XFLAGS_DEAD, and allows |
55 | * GC to reclaim those physical nodes. | |
aa98d7cf | 56 | * -------------------------------------------------- */ |
aa98d7cf KK |
57 | static uint32_t xattr_datum_hashkey(int xprefix, const char *xname, const char *xvalue, int xsize) |
58 | { | |
59 | int name_len = strlen(xname); | |
60 | ||
61 | return crc32(xprefix, xname, name_len) ^ crc32(xprefix, xvalue, xsize); | |
62 | } | |
63 | ||
c9f700f8 KK |
64 | static int is_xattr_datum_unchecked(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) |
65 | { | |
66 | struct jffs2_raw_node_ref *raw; | |
67 | int rc = 0; | |
68 | ||
69 | spin_lock(&c->erase_completion_lock); | |
70 | for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { | |
71 | if (ref_flags(raw) == REF_UNCHECKED) { | |
72 | rc = 1; | |
73 | break; | |
74 | } | |
75 | } | |
76 | spin_unlock(&c->erase_completion_lock); | |
77 | return rc; | |
78 | } | |
79 | ||
aa98d7cf KK |
80 | static void unload_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) |
81 | { | |
82 | /* must be called under down_write(xattr_sem) */ | |
83 | D1(dbg_xattr("%s: xid=%u, version=%u\n", __FUNCTION__, xd->xid, xd->version)); | |
84 | if (xd->xname) { | |
85 | c->xdatum_mem_usage -= (xd->name_len + 1 + xd->value_len); | |
86 | kfree(xd->xname); | |
87 | } | |
88 | ||
89 | list_del_init(&xd->xindex); | |
90 | xd->hashkey = 0; | |
91 | xd->xname = NULL; | |
92 | xd->xvalue = NULL; | |
93 | } | |
94 | ||
95 | static void reclaim_xattr_datum(struct jffs2_sb_info *c) | |
96 | { | |
97 | /* must be called under down_write(xattr_sem) */ | |
98 | struct jffs2_xattr_datum *xd, *_xd; | |
99 | uint32_t target, before; | |
100 | static int index = 0; | |
101 | int count; | |
102 | ||
103 | if (c->xdatum_mem_threshold > c->xdatum_mem_usage) | |
104 | return; | |
105 | ||
106 | before = c->xdatum_mem_usage; | |
107 | target = c->xdatum_mem_usage * 4 / 5; /* 20% reduction */ | |
108 | for (count = 0; count < XATTRINDEX_HASHSIZE; count++) { | |
109 | list_for_each_entry_safe(xd, _xd, &c->xattrindex[index], xindex) { | |
110 | if (xd->flags & JFFS2_XFLAGS_HOT) { | |
111 | xd->flags &= ~JFFS2_XFLAGS_HOT; | |
112 | } else if (!(xd->flags & JFFS2_XFLAGS_BIND)) { | |
113 | unload_xattr_datum(c, xd); | |
114 | } | |
115 | if (c->xdatum_mem_usage <= target) | |
116 | goto out; | |
117 | } | |
118 | index = (index+1) % XATTRINDEX_HASHSIZE; | |
119 | } | |
120 | out: | |
121 | JFFS2_NOTICE("xdatum_mem_usage from %u byte to %u byte (%u byte reclaimed)\n", | |
122 | before, c->xdatum_mem_usage, before - c->xdatum_mem_usage); | |
123 | } | |
124 | ||
aa98d7cf KK |
125 | static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) |
126 | { | |
127 | /* must be called under down_write(xattr_sem) */ | |
128 | struct jffs2_eraseblock *jeb; | |
c9f700f8 | 129 | struct jffs2_raw_node_ref *raw; |
aa98d7cf KK |
130 | struct jffs2_raw_xattr rx; |
131 | size_t readlen; | |
c9f700f8 | 132 | uint32_t crc, offset, totlen; |
aa98d7cf KK |
133 | int rc; |
134 | ||
c9f700f8 KK |
135 | spin_lock(&c->erase_completion_lock); |
136 | offset = ref_offset(xd->node); | |
137 | if (ref_flags(xd->node) == REF_PRISTINE) | |
138 | goto complete; | |
139 | spin_unlock(&c->erase_completion_lock); | |
aa98d7cf | 140 | |
c9f700f8 | 141 | rc = jffs2_flash_read(c, offset, sizeof(rx), &readlen, (char *)&rx); |
aa98d7cf | 142 | if (rc || readlen != sizeof(rx)) { |
89291a9d | 143 | JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu at %#08x\n", |
c9f700f8 | 144 | rc, sizeof(rx), readlen, offset); |
aa98d7cf KK |
145 | return rc ? rc : -EIO; |
146 | } | |
147 | crc = crc32(0, &rx, sizeof(rx) - 4); | |
148 | if (crc != je32_to_cpu(rx.node_crc)) { | |
c9f700f8 KK |
149 | JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", |
150 | offset, je32_to_cpu(rx.hdr_crc), crc); | |
151 | xd->flags |= JFFS2_XFLAGS_INVALID; | |
aa98d7cf KK |
152 | return EIO; |
153 | } | |
8a13695c | 154 | totlen = PAD(sizeof(rx) + rx.name_len + 1 + je16_to_cpu(rx.value_len)); |
aa98d7cf KK |
155 | if (je16_to_cpu(rx.magic) != JFFS2_MAGIC_BITMASK |
156 | || je16_to_cpu(rx.nodetype) != JFFS2_NODETYPE_XATTR | |
157 | || je32_to_cpu(rx.totlen) != totlen | |
158 | || je32_to_cpu(rx.xid) != xd->xid | |
159 | || je32_to_cpu(rx.version) != xd->version) { | |
160 | JFFS2_ERROR("inconsistent xdatum at %#08x, magic=%#04x/%#04x, " | |
161 | "nodetype=%#04x/%#04x, totlen=%u/%u, xid=%u/%u, version=%u/%u\n", | |
c9f700f8 | 162 | offset, je16_to_cpu(rx.magic), JFFS2_MAGIC_BITMASK, |
aa98d7cf KK |
163 | je16_to_cpu(rx.nodetype), JFFS2_NODETYPE_XATTR, |
164 | je32_to_cpu(rx.totlen), totlen, | |
165 | je32_to_cpu(rx.xid), xd->xid, | |
166 | je32_to_cpu(rx.version), xd->version); | |
c9f700f8 | 167 | xd->flags |= JFFS2_XFLAGS_INVALID; |
aa98d7cf KK |
168 | return EIO; |
169 | } | |
170 | xd->xprefix = rx.xprefix; | |
171 | xd->name_len = rx.name_len; | |
172 | xd->value_len = je16_to_cpu(rx.value_len); | |
173 | xd->data_crc = je32_to_cpu(rx.data_crc); | |
174 | ||
aa98d7cf | 175 | spin_lock(&c->erase_completion_lock); |
c9f700f8 KK |
176 | complete: |
177 | for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { | |
178 | jeb = &c->blocks[ref_offset(raw) / c->sector_size]; | |
179 | totlen = PAD(ref_totlen(c, jeb, raw)); | |
180 | if (ref_flags(raw) == REF_UNCHECKED) { | |
181 | c->unchecked_size -= totlen; c->used_size += totlen; | |
182 | jeb->unchecked_size -= totlen; jeb->used_size += totlen; | |
183 | } | |
184 | raw->flash_offset = ref_offset(raw) | ((xd->node==raw) ? REF_PRISTINE : REF_NORMAL); | |
185 | } | |
aa98d7cf KK |
186 | spin_unlock(&c->erase_completion_lock); |
187 | ||
188 | /* unchecked xdatum is chained with c->xattr_unchecked */ | |
189 | list_del_init(&xd->xindex); | |
190 | ||
191 | dbg_xattr("success on verfying xdatum (xid=%u, version=%u)\n", | |
192 | xd->xid, xd->version); | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
197 | static int do_load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) | |
198 | { | |
199 | /* must be called under down_write(xattr_sem) */ | |
200 | char *data; | |
201 | size_t readlen; | |
202 | uint32_t crc, length; | |
203 | int i, ret, retry = 0; | |
204 | ||
aa98d7cf KK |
205 | BUG_ON(ref_flags(xd->node) != REF_PRISTINE); |
206 | BUG_ON(!list_empty(&xd->xindex)); | |
207 | retry: | |
208 | length = xd->name_len + 1 + xd->value_len; | |
209 | data = kmalloc(length, GFP_KERNEL); | |
210 | if (!data) | |
211 | return -ENOMEM; | |
212 | ||
213 | ret = jffs2_flash_read(c, ref_offset(xd->node)+sizeof(struct jffs2_raw_xattr), | |
214 | length, &readlen, data); | |
215 | ||
216 | if (ret || length!=readlen) { | |
89291a9d | 217 | JFFS2_WARNING("jffs2_flash_read() returned %d, request=%d, readlen=%zu, at %#08x\n", |
aa98d7cf KK |
218 | ret, length, readlen, ref_offset(xd->node)); |
219 | kfree(data); | |
220 | return ret ? ret : -EIO; | |
221 | } | |
222 | ||
223 | data[xd->name_len] = '\0'; | |
224 | crc = crc32(0, data, length); | |
225 | if (crc != xd->data_crc) { | |
226 | JFFS2_WARNING("node CRC failed (JFFS2_NODETYPE_XREF)" | |
227 | " at %#08x, read: 0x%08x calculated: 0x%08x\n", | |
228 | ref_offset(xd->node), xd->data_crc, crc); | |
229 | kfree(data); | |
c9f700f8 | 230 | xd->flags |= JFFS2_XFLAGS_INVALID; |
aa98d7cf KK |
231 | return EIO; |
232 | } | |
233 | ||
234 | xd->flags |= JFFS2_XFLAGS_HOT; | |
235 | xd->xname = data; | |
236 | xd->xvalue = data + xd->name_len+1; | |
237 | ||
238 | c->xdatum_mem_usage += length; | |
239 | ||
240 | xd->hashkey = xattr_datum_hashkey(xd->xprefix, xd->xname, xd->xvalue, xd->value_len); | |
241 | i = xd->hashkey % XATTRINDEX_HASHSIZE; | |
242 | list_add(&xd->xindex, &c->xattrindex[i]); | |
243 | if (!retry) { | |
244 | retry = 1; | |
245 | reclaim_xattr_datum(c); | |
246 | if (!xd->xname) | |
247 | goto retry; | |
248 | } | |
249 | ||
250 | dbg_xattr("success on loading xdatum (xid=%u, xprefix=%u, xname='%s')\n", | |
251 | xd->xid, xd->xprefix, xd->xname); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | static int load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) | |
257 | { | |
258 | /* must be called under down_write(xattr_sem); | |
259 | * rc < 0 : recoverable error, try again | |
260 | * rc = 0 : success | |
261 | * rc > 0 : Unrecoverable error, this node should be deleted. | |
262 | */ | |
263 | int rc = 0; | |
c9f700f8 | 264 | |
8a13695c | 265 | BUG_ON(xd->flags & JFFS2_XFLAGS_DEAD); |
c9f700f8 KK |
266 | if (xd->xname) |
267 | return 0; | |
268 | if (xd->flags & JFFS2_XFLAGS_INVALID) | |
aa98d7cf | 269 | return EIO; |
c9f700f8 | 270 | if (unlikely(is_xattr_datum_unchecked(c, xd))) |
aa98d7cf | 271 | rc = do_verify_xattr_datum(c, xd); |
aa98d7cf KK |
272 | if (!rc) |
273 | rc = do_load_xattr_datum(c, xd); | |
274 | return rc; | |
275 | } | |
276 | ||
9fe4854c | 277 | static int save_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) |
aa98d7cf KK |
278 | { |
279 | /* must be called under down_write(xattr_sem) */ | |
2f785402 | 280 | struct jffs2_raw_xattr rx; |
aa98d7cf | 281 | struct kvec vecs[2]; |
89291a9d | 282 | size_t length; |
8a13695c | 283 | int rc, totlen; |
9fe4854c | 284 | uint32_t phys_ofs = write_ofs(c); |
aa98d7cf | 285 | |
8a13695c KK |
286 | BUG_ON(!xd->xname); |
287 | BUG_ON(xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID)); | |
aa98d7cf KK |
288 | |
289 | vecs[0].iov_base = ℞ | |
8a13695c KK |
290 | vecs[0].iov_len = sizeof(rx); |
291 | vecs[1].iov_base = xd->xname; | |
292 | vecs[1].iov_len = xd->name_len + 1 + xd->value_len; | |
293 | totlen = vecs[0].iov_len + vecs[1].iov_len; | |
294 | ||
aa98d7cf | 295 | /* Setup raw-xattr */ |
c9f700f8 | 296 | memset(&rx, 0, sizeof(rx)); |
aa98d7cf KK |
297 | rx.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
298 | rx.nodetype = cpu_to_je16(JFFS2_NODETYPE_XATTR); | |
299 | rx.totlen = cpu_to_je32(PAD(totlen)); | |
300 | rx.hdr_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_unknown_node) - 4)); | |
301 | ||
302 | rx.xid = cpu_to_je32(xd->xid); | |
8a13695c KK |
303 | rx.version = cpu_to_je32(++xd->version); |
304 | rx.xprefix = xd->xprefix; | |
305 | rx.name_len = xd->name_len; | |
306 | rx.value_len = cpu_to_je16(xd->value_len); | |
307 | rx.data_crc = cpu_to_je32(crc32(0, vecs[1].iov_base, vecs[1].iov_len)); | |
aa98d7cf KK |
308 | rx.node_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_raw_xattr) - 4)); |
309 | ||
8a13695c | 310 | rc = jffs2_flash_writev(c, vecs, 2, phys_ofs, &length, 0); |
aa98d7cf | 311 | if (rc || totlen != length) { |
89291a9d | 312 | JFFS2_WARNING("jffs2_flash_writev()=%d, req=%u, wrote=%zu, at %#08x\n", |
aa98d7cf KK |
313 | rc, totlen, length, phys_ofs); |
314 | rc = rc ? rc : -EIO; | |
2f785402 DW |
315 | if (length) |
316 | jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(totlen), NULL); | |
317 | ||
aa98d7cf KK |
318 | return rc; |
319 | } | |
aa98d7cf | 320 | /* success */ |
c9f700f8 | 321 | jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(totlen), (void *)xd); |
aa98d7cf KK |
322 | |
323 | dbg_xattr("success on saving xdatum (xid=%u, version=%u, xprefix=%u, xname='%s')\n", | |
324 | xd->xid, xd->version, xd->xprefix, xd->xname); | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | static struct jffs2_xattr_datum *create_xattr_datum(struct jffs2_sb_info *c, | |
330 | int xprefix, const char *xname, | |
9fe4854c | 331 | const char *xvalue, int xsize) |
aa98d7cf KK |
332 | { |
333 | /* must be called under down_write(xattr_sem) */ | |
334 | struct jffs2_xattr_datum *xd; | |
335 | uint32_t hashkey, name_len; | |
336 | char *data; | |
337 | int i, rc; | |
338 | ||
339 | /* Search xattr_datum has same xname/xvalue by index */ | |
340 | hashkey = xattr_datum_hashkey(xprefix, xname, xvalue, xsize); | |
341 | i = hashkey % XATTRINDEX_HASHSIZE; | |
342 | list_for_each_entry(xd, &c->xattrindex[i], xindex) { | |
343 | if (xd->hashkey==hashkey | |
344 | && xd->xprefix==xprefix | |
345 | && xd->value_len==xsize | |
346 | && !strcmp(xd->xname, xname) | |
347 | && !memcmp(xd->xvalue, xvalue, xsize)) { | |
2c887e23 | 348 | atomic_inc(&xd->refcnt); |
aa98d7cf KK |
349 | return xd; |
350 | } | |
351 | } | |
352 | ||
353 | /* Not found, Create NEW XATTR-Cache */ | |
354 | name_len = strlen(xname); | |
355 | ||
356 | xd = jffs2_alloc_xattr_datum(); | |
357 | if (!xd) | |
358 | return ERR_PTR(-ENOMEM); | |
359 | ||
360 | data = kmalloc(name_len + 1 + xsize, GFP_KERNEL); | |
361 | if (!data) { | |
362 | jffs2_free_xattr_datum(xd); | |
363 | return ERR_PTR(-ENOMEM); | |
364 | } | |
365 | strcpy(data, xname); | |
366 | memcpy(data + name_len + 1, xvalue, xsize); | |
367 | ||
2c887e23 | 368 | atomic_set(&xd->refcnt, 1); |
aa98d7cf KK |
369 | xd->xid = ++c->highest_xid; |
370 | xd->flags |= JFFS2_XFLAGS_HOT; | |
371 | xd->xprefix = xprefix; | |
372 | ||
373 | xd->hashkey = hashkey; | |
374 | xd->xname = data; | |
375 | xd->xvalue = data + name_len + 1; | |
376 | xd->name_len = name_len; | |
377 | xd->value_len = xsize; | |
378 | xd->data_crc = crc32(0, data, xd->name_len + 1 + xd->value_len); | |
379 | ||
9fe4854c | 380 | rc = save_xattr_datum(c, xd); |
aa98d7cf KK |
381 | if (rc) { |
382 | kfree(xd->xname); | |
383 | jffs2_free_xattr_datum(xd); | |
384 | return ERR_PTR(rc); | |
385 | } | |
386 | ||
387 | /* Insert Hash Index */ | |
388 | i = hashkey % XATTRINDEX_HASHSIZE; | |
389 | list_add(&xd->xindex, &c->xattrindex[i]); | |
390 | ||
391 | c->xdatum_mem_usage += (xd->name_len + 1 + xd->value_len); | |
392 | reclaim_xattr_datum(c); | |
393 | ||
394 | return xd; | |
395 | } | |
396 | ||
8a13695c | 397 | static void delete_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) |
c9f700f8 KK |
398 | { |
399 | /* must be called under down_write(xattr_sem) */ | |
2c887e23 | 400 | BUG_ON(atomic_read(&xd->refcnt)); |
c9f700f8 KK |
401 | |
402 | unload_xattr_datum(c, xd); | |
8a13695c | 403 | xd->flags |= JFFS2_XFLAGS_DEAD; |
c9f700f8 | 404 | spin_lock(&c->erase_completion_lock); |
8a13695c KK |
405 | if (xd->node == (void *)xd) { |
406 | BUG_ON(!(xd->flags & JFFS2_XFLAGS_INVALID)); | |
407 | jffs2_free_xattr_datum(xd); | |
408 | } else { | |
409 | list_add(&xd->xindex, &c->xattr_dead_list); | |
c9f700f8 | 410 | } |
c9f700f8 | 411 | spin_unlock(&c->erase_completion_lock); |
8a13695c | 412 | dbg_xattr("xdatum(xid=%u, version=%u) was removed.\n", xd->xid, xd->version); |
c9f700f8 KK |
413 | } |
414 | ||
21b9879b | 415 | /* -------- xref related functions ------------------ |
aa98d7cf KK |
416 | * verify_xattr_ref(c, ref) |
417 | * is used to load xref information from medium. Because summary data does not | |
418 | * contain xid/ino, it's necessary to verify once while mounting process. | |
9fe4854c | 419 | * save_xattr_ref(c, ref) |
8a13695c KK |
420 | * is used to write xref to medium. If delete marker is marked, it write |
421 | * a delete marker of xref into medium. | |
9fe4854c | 422 | * create_xattr_ref(c, ic, xd) |
aa98d7cf | 423 | * is used to create a new xref and write to medium. |
8a13695c KK |
424 | * delete_xattr_ref(c, ref) |
425 | * is used to delete jffs2_xattr_ref. It marks xref XREF_DELETE_MARKER, | |
426 | * and allows GC to reclaim those physical nodes. | |
aa98d7cf KK |
427 | * jffs2_xattr_delete_inode(c, ic) |
428 | * is called to remove xrefs related to obsolete inode when inode is unlinked. | |
429 | * jffs2_xattr_free_inode(c, ic) | |
430 | * is called to release xattr related objects when unmounting. | |
8f2b6f49 | 431 | * check_xattr_ref_inode(c, ic) |
aa98d7cf KK |
432 | * is used to confirm inode does not have duplicate xattr name/value pair. |
433 | * -------------------------------------------------- */ | |
434 | static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) | |
435 | { | |
436 | struct jffs2_eraseblock *jeb; | |
c9f700f8 | 437 | struct jffs2_raw_node_ref *raw; |
aa98d7cf KK |
438 | struct jffs2_raw_xref rr; |
439 | size_t readlen; | |
c9f700f8 | 440 | uint32_t crc, offset, totlen; |
aa98d7cf KK |
441 | int rc; |
442 | ||
c9f700f8 KK |
443 | spin_lock(&c->erase_completion_lock); |
444 | if (ref_flags(ref->node) != REF_UNCHECKED) | |
445 | goto complete; | |
446 | offset = ref_offset(ref->node); | |
447 | spin_unlock(&c->erase_completion_lock); | |
aa98d7cf | 448 | |
c9f700f8 | 449 | rc = jffs2_flash_read(c, offset, sizeof(rr), &readlen, (char *)&rr); |
aa98d7cf | 450 | if (rc || sizeof(rr) != readlen) { |
89291a9d | 451 | JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu, at %#08x\n", |
c9f700f8 | 452 | rc, sizeof(rr), readlen, offset); |
aa98d7cf KK |
453 | return rc ? rc : -EIO; |
454 | } | |
455 | /* obsolete node */ | |
456 | crc = crc32(0, &rr, sizeof(rr) - 4); | |
457 | if (crc != je32_to_cpu(rr.node_crc)) { | |
c9f700f8 KK |
458 | JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", |
459 | offset, je32_to_cpu(rr.node_crc), crc); | |
aa98d7cf KK |
460 | return EIO; |
461 | } | |
462 | if (je16_to_cpu(rr.magic) != JFFS2_MAGIC_BITMASK | |
463 | || je16_to_cpu(rr.nodetype) != JFFS2_NODETYPE_XREF | |
464 | || je32_to_cpu(rr.totlen) != PAD(sizeof(rr))) { | |
465 | JFFS2_ERROR("inconsistent xref at %#08x, magic=%#04x/%#04x, " | |
89291a9d | 466 | "nodetype=%#04x/%#04x, totlen=%u/%zu\n", |
c9f700f8 | 467 | offset, je16_to_cpu(rr.magic), JFFS2_MAGIC_BITMASK, |
aa98d7cf KK |
468 | je16_to_cpu(rr.nodetype), JFFS2_NODETYPE_XREF, |
469 | je32_to_cpu(rr.totlen), PAD(sizeof(rr))); | |
470 | return EIO; | |
471 | } | |
472 | ref->ino = je32_to_cpu(rr.ino); | |
473 | ref->xid = je32_to_cpu(rr.xid); | |
c9f700f8 KK |
474 | ref->xseqno = je32_to_cpu(rr.xseqno); |
475 | if (ref->xseqno > c->highest_xseqno) | |
476 | c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER); | |
aa98d7cf KK |
477 | |
478 | spin_lock(&c->erase_completion_lock); | |
c9f700f8 KK |
479 | complete: |
480 | for (raw=ref->node; raw != (void *)ref; raw=raw->next_in_ino) { | |
481 | jeb = &c->blocks[ref_offset(raw) / c->sector_size]; | |
482 | totlen = PAD(ref_totlen(c, jeb, raw)); | |
483 | if (ref_flags(raw) == REF_UNCHECKED) { | |
484 | c->unchecked_size -= totlen; c->used_size += totlen; | |
485 | jeb->unchecked_size -= totlen; jeb->used_size += totlen; | |
486 | } | |
487 | raw->flash_offset = ref_offset(raw) | ((ref->node==raw) ? REF_PRISTINE : REF_NORMAL); | |
488 | } | |
aa98d7cf KK |
489 | spin_unlock(&c->erase_completion_lock); |
490 | ||
491 | dbg_xattr("success on verifying xref (ino=%u, xid=%u) at %#08x\n", | |
492 | ref->ino, ref->xid, ref_offset(ref->node)); | |
493 | return 0; | |
494 | } | |
495 | ||
9fe4854c | 496 | static int save_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) |
aa98d7cf KK |
497 | { |
498 | /* must be called under down_write(xattr_sem) */ | |
aa98d7cf | 499 | struct jffs2_raw_xref rr; |
89291a9d | 500 | size_t length; |
c9f700f8 | 501 | uint32_t xseqno, phys_ofs = write_ofs(c); |
aa98d7cf KK |
502 | int ret; |
503 | ||
aa98d7cf KK |
504 | rr.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
505 | rr.nodetype = cpu_to_je16(JFFS2_NODETYPE_XREF); | |
506 | rr.totlen = cpu_to_je32(PAD(sizeof(rr))); | |
507 | rr.hdr_crc = cpu_to_je32(crc32(0, &rr, sizeof(struct jffs2_unknown_node) - 4)); | |
508 | ||
c9f700f8 KK |
509 | xseqno = (c->highest_xseqno += 2); |
510 | if (is_xattr_ref_dead(ref)) { | |
511 | xseqno |= XREF_DELETE_MARKER; | |
512 | rr.ino = cpu_to_je32(ref->ino); | |
513 | rr.xid = cpu_to_je32(ref->xid); | |
514 | } else { | |
515 | rr.ino = cpu_to_je32(ref->ic->ino); | |
516 | rr.xid = cpu_to_je32(ref->xd->xid); | |
517 | } | |
518 | rr.xseqno = cpu_to_je32(xseqno); | |
aa98d7cf KK |
519 | rr.node_crc = cpu_to_je32(crc32(0, &rr, sizeof(rr) - 4)); |
520 | ||
521 | ret = jffs2_flash_write(c, phys_ofs, sizeof(rr), &length, (char *)&rr); | |
522 | if (ret || sizeof(rr) != length) { | |
89291a9d | 523 | JFFS2_WARNING("jffs2_flash_write() returned %d, request=%zu, retlen=%zu, at %#08x\n", |
aa98d7cf KK |
524 | ret, sizeof(rr), length, phys_ofs); |
525 | ret = ret ? ret : -EIO; | |
2f785402 DW |
526 | if (length) |
527 | jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(sizeof(rr)), NULL); | |
528 | ||
aa98d7cf KK |
529 | return ret; |
530 | } | |
c9f700f8 KK |
531 | /* success */ |
532 | ref->xseqno = xseqno; | |
533 | jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(sizeof(rr)), (void *)ref); | |
aa98d7cf KK |
534 | |
535 | dbg_xattr("success on saving xref (ino=%u, xid=%u)\n", ref->ic->ino, ref->xd->xid); | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
540 | static struct jffs2_xattr_ref *create_xattr_ref(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, | |
9fe4854c | 541 | struct jffs2_xattr_datum *xd) |
aa98d7cf KK |
542 | { |
543 | /* must be called under down_write(xattr_sem) */ | |
544 | struct jffs2_xattr_ref *ref; | |
545 | int ret; | |
546 | ||
547 | ref = jffs2_alloc_xattr_ref(); | |
548 | if (!ref) | |
549 | return ERR_PTR(-ENOMEM); | |
550 | ref->ic = ic; | |
551 | ref->xd = xd; | |
552 | ||
9fe4854c | 553 | ret = save_xattr_ref(c, ref); |
aa98d7cf KK |
554 | if (ret) { |
555 | jffs2_free_xattr_ref(ref); | |
556 | return ERR_PTR(ret); | |
557 | } | |
558 | ||
559 | /* Chain to inode */ | |
8f2b6f49 KK |
560 | ref->next = ic->xref; |
561 | ic->xref = ref; | |
aa98d7cf KK |
562 | |
563 | return ref; /* success */ | |
564 | } | |
565 | ||
8a13695c | 566 | static void delete_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) |
c9f700f8 KK |
567 | { |
568 | /* must be called under down_write(xattr_sem) */ | |
569 | struct jffs2_xattr_datum *xd; | |
570 | ||
c9f700f8 | 571 | xd = ref->xd; |
8a13695c | 572 | ref->xseqno |= XREF_DELETE_MARKER; |
c9f700f8 KK |
573 | ref->ino = ref->ic->ino; |
574 | ref->xid = ref->xd->xid; | |
575 | spin_lock(&c->erase_completion_lock); | |
576 | ref->next = c->xref_dead_list; | |
577 | c->xref_dead_list = ref; | |
578 | spin_unlock(&c->erase_completion_lock); | |
579 | ||
8a13695c KK |
580 | dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) was removed.\n", |
581 | ref->ino, ref->xid, ref->xseqno); | |
c9f700f8 | 582 | |
2c887e23 | 583 | if (atomic_dec_and_test(&xd->refcnt)) |
c9f700f8 | 584 | delete_xattr_datum(c, xd); |
c9f700f8 KK |
585 | } |
586 | ||
aa98d7cf KK |
587 | void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) |
588 | { | |
589 | /* It's called from jffs2_clear_inode() on inode removing. | |
590 | When an inode with XATTR is removed, those XATTRs must be removed. */ | |
8a13695c | 591 | struct jffs2_xattr_ref *ref, *_ref; |
aa98d7cf KK |
592 | |
593 | if (!ic || ic->nlink > 0) | |
594 | return; | |
595 | ||
596 | down_write(&c->xattr_sem); | |
8a13695c KK |
597 | for (ref = ic->xref; ref; ref = _ref) { |
598 | _ref = ref->next; | |
599 | delete_xattr_ref(c, ref); | |
8f2b6f49 | 600 | } |
8a13695c | 601 | ic->xref = NULL; |
aa98d7cf KK |
602 | up_write(&c->xattr_sem); |
603 | } | |
604 | ||
605 | void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) | |
606 | { | |
607 | /* It's called from jffs2_free_ino_caches() until unmounting FS. */ | |
608 | struct jffs2_xattr_datum *xd; | |
609 | struct jffs2_xattr_ref *ref, *_ref; | |
610 | ||
611 | down_write(&c->xattr_sem); | |
8f2b6f49 KK |
612 | for (ref = ic->xref; ref; ref = _ref) { |
613 | _ref = ref->next; | |
aa98d7cf | 614 | xd = ref->xd; |
2c887e23 | 615 | if (atomic_dec_and_test(&xd->refcnt)) { |
aa98d7cf KK |
616 | unload_xattr_datum(c, xd); |
617 | jffs2_free_xattr_datum(xd); | |
618 | } | |
619 | jffs2_free_xattr_ref(ref); | |
620 | } | |
8f2b6f49 | 621 | ic->xref = NULL; |
aa98d7cf KK |
622 | up_write(&c->xattr_sem); |
623 | } | |
624 | ||
8f2b6f49 | 625 | static int check_xattr_ref_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) |
aa98d7cf | 626 | { |
8f2b6f49 | 627 | /* success of check_xattr_ref_inode() means taht inode (ic) dose not have |
aa98d7cf KK |
628 | * duplicate name/value pairs. If duplicate name/value pair would be found, |
629 | * one will be removed. | |
630 | */ | |
c9f700f8 | 631 | struct jffs2_xattr_ref *ref, *cmp, **pref, **pcmp; |
aa98d7cf KK |
632 | int rc = 0; |
633 | ||
634 | if (likely(ic->flags & INO_FLAGS_XATTR_CHECKED)) | |
635 | return 0; | |
636 | down_write(&c->xattr_sem); | |
637 | retry: | |
638 | rc = 0; | |
8f2b6f49 | 639 | for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { |
aa98d7cf KK |
640 | if (!ref->xd->xname) { |
641 | rc = load_xattr_datum(c, ref->xd); | |
642 | if (unlikely(rc > 0)) { | |
8f2b6f49 | 643 | *pref = ref->next; |
8a13695c | 644 | delete_xattr_ref(c, ref); |
aa98d7cf KK |
645 | goto retry; |
646 | } else if (unlikely(rc < 0)) | |
647 | goto out; | |
648 | } | |
c9f700f8 | 649 | for (cmp=ref->next, pcmp=&ref->next; cmp; pcmp=&cmp->next, cmp=cmp->next) { |
aa98d7cf KK |
650 | if (!cmp->xd->xname) { |
651 | ref->xd->flags |= JFFS2_XFLAGS_BIND; | |
652 | rc = load_xattr_datum(c, cmp->xd); | |
653 | ref->xd->flags &= ~JFFS2_XFLAGS_BIND; | |
654 | if (unlikely(rc > 0)) { | |
c9f700f8 | 655 | *pcmp = cmp->next; |
8a13695c | 656 | delete_xattr_ref(c, cmp); |
aa98d7cf KK |
657 | goto retry; |
658 | } else if (unlikely(rc < 0)) | |
659 | goto out; | |
660 | } | |
661 | if (ref->xd->xprefix == cmp->xd->xprefix | |
662 | && !strcmp(ref->xd->xname, cmp->xd->xname)) { | |
c9f700f8 KK |
663 | if (ref->xseqno > cmp->xseqno) { |
664 | *pcmp = cmp->next; | |
8a13695c | 665 | delete_xattr_ref(c, cmp); |
c9f700f8 KK |
666 | } else { |
667 | *pref = ref->next; | |
8a13695c | 668 | delete_xattr_ref(c, ref); |
c9f700f8 | 669 | } |
aa98d7cf KK |
670 | goto retry; |
671 | } | |
672 | } | |
673 | } | |
674 | ic->flags |= INO_FLAGS_XATTR_CHECKED; | |
675 | out: | |
676 | up_write(&c->xattr_sem); | |
677 | ||
678 | return rc; | |
679 | } | |
680 | ||
681 | /* -------- xattr subsystem functions --------------- | |
682 | * jffs2_init_xattr_subsystem(c) | |
683 | * is used to initialize semaphore and list_head, and some variables. | |
684 | * jffs2_find_xattr_datum(c, xid) | |
685 | * is used to lookup xdatum while scanning process. | |
686 | * jffs2_clear_xattr_subsystem(c) | |
687 | * is used to release any xattr related objects. | |
688 | * jffs2_build_xattr_subsystem(c) | |
689 | * is used to associate xdatum and xref while super block building process. | |
690 | * jffs2_setup_xattr_datum(c, xid, version) | |
691 | * is used to insert xdatum while scanning process. | |
692 | * -------------------------------------------------- */ | |
693 | void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c) | |
694 | { | |
695 | int i; | |
696 | ||
697 | for (i=0; i < XATTRINDEX_HASHSIZE; i++) | |
698 | INIT_LIST_HEAD(&c->xattrindex[i]); | |
aa98d7cf | 699 | INIT_LIST_HEAD(&c->xattr_unchecked); |
c9f700f8 KK |
700 | INIT_LIST_HEAD(&c->xattr_dead_list); |
701 | c->xref_dead_list = NULL; | |
8f2b6f49 | 702 | c->xref_temp = NULL; |
aa98d7cf KK |
703 | |
704 | init_rwsem(&c->xattr_sem); | |
c9f700f8 KK |
705 | c->highest_xid = 0; |
706 | c->highest_xseqno = 0; | |
aa98d7cf KK |
707 | c->xdatum_mem_usage = 0; |
708 | c->xdatum_mem_threshold = 32 * 1024; /* Default 32KB */ | |
709 | } | |
710 | ||
711 | static struct jffs2_xattr_datum *jffs2_find_xattr_datum(struct jffs2_sb_info *c, uint32_t xid) | |
712 | { | |
713 | struct jffs2_xattr_datum *xd; | |
714 | int i = xid % XATTRINDEX_HASHSIZE; | |
715 | ||
716 | /* It's only used in scanning/building process. */ | |
717 | BUG_ON(!(c->flags & (JFFS2_SB_FLAG_SCANNING|JFFS2_SB_FLAG_BUILDING))); | |
718 | ||
719 | list_for_each_entry(xd, &c->xattrindex[i], xindex) { | |
720 | if (xd->xid==xid) | |
721 | return xd; | |
722 | } | |
723 | return NULL; | |
724 | } | |
725 | ||
726 | void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c) | |
727 | { | |
728 | struct jffs2_xattr_datum *xd, *_xd; | |
729 | struct jffs2_xattr_ref *ref, *_ref; | |
730 | int i; | |
731 | ||
8f2b6f49 KK |
732 | for (ref=c->xref_temp; ref; ref = _ref) { |
733 | _ref = ref->next; | |
aa98d7cf | 734 | jffs2_free_xattr_ref(ref); |
8f2b6f49 | 735 | } |
c9f700f8 KK |
736 | |
737 | for (ref=c->xref_dead_list; ref; ref = _ref) { | |
738 | _ref = ref->next; | |
739 | jffs2_free_xattr_ref(ref); | |
740 | } | |
aa98d7cf KK |
741 | |
742 | for (i=0; i < XATTRINDEX_HASHSIZE; i++) { | |
743 | list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { | |
744 | list_del(&xd->xindex); | |
745 | if (xd->xname) | |
746 | kfree(xd->xname); | |
747 | jffs2_free_xattr_datum(xd); | |
748 | } | |
749 | } | |
c9f700f8 KK |
750 | |
751 | list_for_each_entry_safe(xd, _xd, &c->xattr_dead_list, xindex) { | |
752 | list_del(&xd->xindex); | |
753 | jffs2_free_xattr_datum(xd); | |
754 | } | |
aa98d7cf KK |
755 | } |
756 | ||
c9f700f8 | 757 | #define XREF_TMPHASH_SIZE (128) |
aa98d7cf KK |
758 | void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c) |
759 | { | |
760 | struct jffs2_xattr_ref *ref, *_ref; | |
c9f700f8 | 761 | struct jffs2_xattr_ref *xref_tmphash[XREF_TMPHASH_SIZE]; |
aa98d7cf KK |
762 | struct jffs2_xattr_datum *xd, *_xd; |
763 | struct jffs2_inode_cache *ic; | |
c9f700f8 KK |
764 | struct jffs2_raw_node_ref *raw; |
765 | int i, xdatum_count = 0, xdatum_unchecked_count = 0, xref_count = 0; | |
8a13695c | 766 | int xdatum_orphan_count = 0, xref_orphan_count = 0, xref_dead_count = 0; |
aa98d7cf KK |
767 | |
768 | BUG_ON(!(c->flags & JFFS2_SB_FLAG_BUILDING)); | |
769 | ||
8a13695c | 770 | /* Phase.1 : Merge same xref */ |
c9f700f8 KK |
771 | for (i=0; i < XREF_TMPHASH_SIZE; i++) |
772 | xref_tmphash[i] = NULL; | |
8f2b6f49 | 773 | for (ref=c->xref_temp; ref; ref=_ref) { |
c9f700f8 KK |
774 | struct jffs2_xattr_ref *tmp; |
775 | ||
8f2b6f49 | 776 | _ref = ref->next; |
aa98d7cf KK |
777 | if (ref_flags(ref->node) != REF_PRISTINE) { |
778 | if (verify_xattr_ref(c, ref)) { | |
c9f700f8 KK |
779 | BUG_ON(ref->node->next_in_ino != (void *)ref); |
780 | ref->node->next_in_ino = NULL; | |
781 | jffs2_mark_node_obsolete(c, ref->node); | |
aa98d7cf KK |
782 | jffs2_free_xattr_ref(ref); |
783 | continue; | |
784 | } | |
785 | } | |
c9f700f8 KK |
786 | |
787 | i = (ref->ino ^ ref->xid) % XREF_TMPHASH_SIZE; | |
788 | for (tmp=xref_tmphash[i]; tmp; tmp=tmp->next) { | |
789 | if (tmp->ino == ref->ino && tmp->xid == ref->xid) | |
790 | break; | |
791 | } | |
792 | if (tmp) { | |
793 | raw = ref->node; | |
794 | if (ref->xseqno > tmp->xseqno) { | |
795 | tmp->xseqno = ref->xseqno; | |
796 | raw->next_in_ino = tmp->node; | |
797 | tmp->node = raw; | |
798 | } else { | |
799 | raw->next_in_ino = tmp->node->next_in_ino; | |
800 | tmp->node->next_in_ino = raw; | |
801 | } | |
aa98d7cf KK |
802 | jffs2_free_xattr_ref(ref); |
803 | continue; | |
c9f700f8 KK |
804 | } else { |
805 | ref->next = xref_tmphash[i]; | |
806 | xref_tmphash[i] = ref; | |
aa98d7cf | 807 | } |
aa98d7cf | 808 | } |
8f2b6f49 | 809 | c->xref_temp = NULL; |
aa98d7cf | 810 | |
8a13695c | 811 | /* Phase.2 : Bind xref with inode_cache and xattr_datum */ |
c9f700f8 KK |
812 | for (i=0; i < XREF_TMPHASH_SIZE; i++) { |
813 | for (ref=xref_tmphash[i]; ref; ref=_ref) { | |
8a13695c | 814 | xref_count++; |
c9f700f8 KK |
815 | _ref = ref->next; |
816 | if (is_xattr_ref_dead(ref)) { | |
817 | ref->next = c->xref_dead_list; | |
818 | c->xref_dead_list = ref; | |
8a13695c | 819 | xref_dead_count++; |
c9f700f8 KK |
820 | continue; |
821 | } | |
822 | /* At this point, ref->xid and ref->ino contain XID and inode number. | |
823 | ref->xd and ref->ic are not valid yet. */ | |
824 | xd = jffs2_find_xattr_datum(c, ref->xid); | |
825 | ic = jffs2_get_ino_cache(c, ref->ino); | |
826 | if (!xd || !ic) { | |
8a13695c KK |
827 | dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) is orphan.\n", |
828 | ref->ino, ref->xid, ref->xseqno); | |
829 | ref->xseqno |= XREF_DELETE_MARKER; | |
c9f700f8 KK |
830 | ref->next = c->xref_dead_list; |
831 | c->xref_dead_list = ref; | |
8a13695c | 832 | xref_orphan_count++; |
c9f700f8 KK |
833 | continue; |
834 | } | |
835 | ref->xd = xd; | |
836 | ref->ic = ic; | |
2c887e23 | 837 | atomic_inc(&xd->refcnt); |
c9f700f8 KK |
838 | ref->next = ic->xref; |
839 | ic->xref = ref; | |
c9f700f8 KK |
840 | } |
841 | } | |
842 | ||
8a13695c | 843 | /* Phase.3 : Link unchecked xdatum to xattr_unchecked list */ |
aa98d7cf KK |
844 | for (i=0; i < XATTRINDEX_HASHSIZE; i++) { |
845 | list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { | |
8a13695c | 846 | xdatum_count++; |
aa98d7cf | 847 | list_del_init(&xd->xindex); |
2c887e23 | 848 | if (!atomic_read(&xd->refcnt)) { |
8a13695c KK |
849 | dbg_xattr("xdatum(xid=%u, version=%u) is orphan.\n", |
850 | xd->xid, xd->version); | |
851 | xd->flags |= JFFS2_XFLAGS_DEAD; | |
c9f700f8 | 852 | list_add(&xd->xindex, &c->xattr_unchecked); |
8a13695c | 853 | xdatum_orphan_count++; |
aa98d7cf KK |
854 | continue; |
855 | } | |
c9f700f8 KK |
856 | if (is_xattr_datum_unchecked(c, xd)) { |
857 | dbg_xattr("unchecked xdatum(xid=%u, version=%u)\n", | |
858 | xd->xid, xd->version); | |
aa98d7cf KK |
859 | list_add(&xd->xindex, &c->xattr_unchecked); |
860 | xdatum_unchecked_count++; | |
861 | } | |
aa98d7cf KK |
862 | } |
863 | } | |
864 | /* build complete */ | |
8a13695c KK |
865 | JFFS2_NOTICE("complete building xattr subsystem, %u of xdatum" |
866 | " (%u unchecked, %u orphan) and " | |
867 | "%u of xref (%u dead, %u orphan) found.\n", | |
868 | xdatum_count, xdatum_unchecked_count, xdatum_orphan_count, | |
869 | xref_count, xref_dead_count, xref_orphan_count); | |
aa98d7cf KK |
870 | } |
871 | ||
872 | struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, | |
873 | uint32_t xid, uint32_t version) | |
874 | { | |
c9f700f8 | 875 | struct jffs2_xattr_datum *xd; |
aa98d7cf | 876 | |
c9f700f8 KK |
877 | xd = jffs2_find_xattr_datum(c, xid); |
878 | if (!xd) { | |
879 | xd = jffs2_alloc_xattr_datum(); | |
880 | if (!xd) | |
881 | return ERR_PTR(-ENOMEM); | |
882 | xd->xid = xid; | |
883 | xd->version = version; | |
884 | if (xd->xid > c->highest_xid) | |
885 | c->highest_xid = xd->xid; | |
886 | list_add_tail(&xd->xindex, &c->xattrindex[xid % XATTRINDEX_HASHSIZE]); | |
aa98d7cf KK |
887 | } |
888 | return xd; | |
889 | } | |
890 | ||
891 | /* -------- xattr subsystem functions --------------- | |
892 | * xprefix_to_handler(xprefix) | |
893 | * is used to translate xprefix into xattr_handler. | |
894 | * jffs2_listxattr(dentry, buffer, size) | |
895 | * is an implementation of listxattr handler on jffs2. | |
896 | * do_jffs2_getxattr(inode, xprefix, xname, buffer, size) | |
897 | * is an implementation of getxattr handler on jffs2. | |
898 | * do_jffs2_setxattr(inode, xprefix, xname, buffer, size, flags) | |
899 | * is an implementation of setxattr handler on jffs2. | |
900 | * -------------------------------------------------- */ | |
901 | struct xattr_handler *jffs2_xattr_handlers[] = { | |
902 | &jffs2_user_xattr_handler, | |
903 | #ifdef CONFIG_JFFS2_FS_SECURITY | |
904 | &jffs2_security_xattr_handler, | |
905 | #endif | |
906 | #ifdef CONFIG_JFFS2_FS_POSIX_ACL | |
907 | &jffs2_acl_access_xattr_handler, | |
908 | &jffs2_acl_default_xattr_handler, | |
909 | #endif | |
910 | &jffs2_trusted_xattr_handler, | |
911 | NULL | |
912 | }; | |
913 | ||
914 | static struct xattr_handler *xprefix_to_handler(int xprefix) { | |
915 | struct xattr_handler *ret; | |
916 | ||
917 | switch (xprefix) { | |
918 | case JFFS2_XPREFIX_USER: | |
919 | ret = &jffs2_user_xattr_handler; | |
920 | break; | |
921 | #ifdef CONFIG_JFFS2_FS_SECURITY | |
922 | case JFFS2_XPREFIX_SECURITY: | |
923 | ret = &jffs2_security_xattr_handler; | |
924 | break; | |
925 | #endif | |
926 | #ifdef CONFIG_JFFS2_FS_POSIX_ACL | |
927 | case JFFS2_XPREFIX_ACL_ACCESS: | |
928 | ret = &jffs2_acl_access_xattr_handler; | |
929 | break; | |
930 | case JFFS2_XPREFIX_ACL_DEFAULT: | |
931 | ret = &jffs2_acl_default_xattr_handler; | |
932 | break; | |
933 | #endif | |
934 | case JFFS2_XPREFIX_TRUSTED: | |
935 | ret = &jffs2_trusted_xattr_handler; | |
936 | break; | |
937 | default: | |
938 | ret = NULL; | |
939 | break; | |
940 | } | |
941 | return ret; | |
942 | } | |
943 | ||
944 | ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size) | |
945 | { | |
946 | struct inode *inode = dentry->d_inode; | |
947 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); | |
948 | struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); | |
949 | struct jffs2_inode_cache *ic = f->inocache; | |
8f2b6f49 | 950 | struct jffs2_xattr_ref *ref, **pref; |
aa98d7cf KK |
951 | struct jffs2_xattr_datum *xd; |
952 | struct xattr_handler *xhandle; | |
953 | ssize_t len, rc; | |
954 | int retry = 0; | |
955 | ||
8f2b6f49 | 956 | rc = check_xattr_ref_inode(c, ic); |
aa98d7cf KK |
957 | if (unlikely(rc)) |
958 | return rc; | |
959 | ||
960 | down_read(&c->xattr_sem); | |
961 | retry: | |
962 | len = 0; | |
8f2b6f49 | 963 | for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { |
aa98d7cf KK |
964 | BUG_ON(ref->ic != ic); |
965 | xd = ref->xd; | |
966 | if (!xd->xname) { | |
967 | /* xdatum is unchached */ | |
968 | if (!retry) { | |
969 | retry = 1; | |
970 | up_read(&c->xattr_sem); | |
971 | down_write(&c->xattr_sem); | |
972 | goto retry; | |
973 | } else { | |
974 | rc = load_xattr_datum(c, xd); | |
975 | if (unlikely(rc > 0)) { | |
8f2b6f49 | 976 | *pref = ref->next; |
8a13695c | 977 | delete_xattr_ref(c, ref); |
aa98d7cf KK |
978 | goto retry; |
979 | } else if (unlikely(rc < 0)) | |
980 | goto out; | |
981 | } | |
982 | } | |
983 | xhandle = xprefix_to_handler(xd->xprefix); | |
984 | if (!xhandle) | |
985 | continue; | |
986 | if (buffer) { | |
987 | rc = xhandle->list(inode, buffer+len, size-len, xd->xname, xd->name_len); | |
988 | } else { | |
989 | rc = xhandle->list(inode, NULL, 0, xd->xname, xd->name_len); | |
990 | } | |
991 | if (rc < 0) | |
992 | goto out; | |
993 | len += rc; | |
994 | } | |
995 | rc = len; | |
996 | out: | |
997 | if (!retry) { | |
998 | up_read(&c->xattr_sem); | |
999 | } else { | |
1000 | up_write(&c->xattr_sem); | |
1001 | } | |
1002 | return rc; | |
1003 | } | |
1004 | ||
1005 | int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, | |
1006 | char *buffer, size_t size) | |
1007 | { | |
1008 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); | |
1009 | struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); | |
1010 | struct jffs2_inode_cache *ic = f->inocache; | |
1011 | struct jffs2_xattr_datum *xd; | |
8f2b6f49 | 1012 | struct jffs2_xattr_ref *ref, **pref; |
aa98d7cf KK |
1013 | int rc, retry = 0; |
1014 | ||
8f2b6f49 | 1015 | rc = check_xattr_ref_inode(c, ic); |
aa98d7cf KK |
1016 | if (unlikely(rc)) |
1017 | return rc; | |
1018 | ||
1019 | down_read(&c->xattr_sem); | |
1020 | retry: | |
8f2b6f49 | 1021 | for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { |
aa98d7cf KK |
1022 | BUG_ON(ref->ic!=ic); |
1023 | ||
1024 | xd = ref->xd; | |
1025 | if (xd->xprefix != xprefix) | |
1026 | continue; | |
1027 | if (!xd->xname) { | |
1028 | /* xdatum is unchached */ | |
1029 | if (!retry) { | |
1030 | retry = 1; | |
1031 | up_read(&c->xattr_sem); | |
1032 | down_write(&c->xattr_sem); | |
1033 | goto retry; | |
1034 | } else { | |
1035 | rc = load_xattr_datum(c, xd); | |
1036 | if (unlikely(rc > 0)) { | |
8f2b6f49 | 1037 | *pref = ref->next; |
8a13695c | 1038 | delete_xattr_ref(c, ref); |
aa98d7cf KK |
1039 | goto retry; |
1040 | } else if (unlikely(rc < 0)) { | |
1041 | goto out; | |
1042 | } | |
1043 | } | |
1044 | } | |
1045 | if (!strcmp(xname, xd->xname)) { | |
1046 | rc = xd->value_len; | |
1047 | if (buffer) { | |
1048 | if (size < rc) { | |
1049 | rc = -ERANGE; | |
1050 | } else { | |
1051 | memcpy(buffer, xd->xvalue, rc); | |
1052 | } | |
1053 | } | |
1054 | goto out; | |
1055 | } | |
1056 | } | |
1057 | rc = -ENODATA; | |
1058 | out: | |
1059 | if (!retry) { | |
1060 | up_read(&c->xattr_sem); | |
1061 | } else { | |
1062 | up_write(&c->xattr_sem); | |
1063 | } | |
1064 | return rc; | |
1065 | } | |
1066 | ||
1067 | int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, | |
1068 | const char *buffer, size_t size, int flags) | |
1069 | { | |
1070 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); | |
1071 | struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); | |
1072 | struct jffs2_inode_cache *ic = f->inocache; | |
1073 | struct jffs2_xattr_datum *xd; | |
8f2b6f49 | 1074 | struct jffs2_xattr_ref *ref, *newref, **pref; |
9fe4854c | 1075 | uint32_t length, request; |
aa98d7cf KK |
1076 | int rc; |
1077 | ||
8f2b6f49 | 1078 | rc = check_xattr_ref_inode(c, ic); |
aa98d7cf KK |
1079 | if (unlikely(rc)) |
1080 | return rc; | |
1081 | ||
1082 | request = PAD(sizeof(struct jffs2_raw_xattr) + strlen(xname) + 1 + size); | |
9fe4854c | 1083 | rc = jffs2_reserve_space(c, request, &length, |
aa98d7cf KK |
1084 | ALLOC_NORMAL, JFFS2_SUMMARY_XATTR_SIZE); |
1085 | if (rc) { | |
1086 | JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); | |
1087 | return rc; | |
1088 | } | |
1089 | ||
1090 | /* Find existing xattr */ | |
1091 | down_write(&c->xattr_sem); | |
1092 | retry: | |
8f2b6f49 | 1093 | for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { |
aa98d7cf KK |
1094 | xd = ref->xd; |
1095 | if (xd->xprefix != xprefix) | |
1096 | continue; | |
1097 | if (!xd->xname) { | |
1098 | rc = load_xattr_datum(c, xd); | |
1099 | if (unlikely(rc > 0)) { | |
8f2b6f49 | 1100 | *pref = ref->next; |
8a13695c | 1101 | delete_xattr_ref(c, ref); |
aa98d7cf KK |
1102 | goto retry; |
1103 | } else if (unlikely(rc < 0)) | |
1104 | goto out; | |
1105 | } | |
1106 | if (!strcmp(xd->xname, xname)) { | |
1107 | if (flags & XATTR_CREATE) { | |
1108 | rc = -EEXIST; | |
1109 | goto out; | |
1110 | } | |
1111 | if (!buffer) { | |
8a13695c KK |
1112 | ref->ino = ic->ino; |
1113 | ref->xid = xd->xid; | |
1114 | ref->xseqno |= XREF_DELETE_MARKER; | |
1115 | rc = save_xattr_ref(c, ref); | |
1116 | if (!rc) { | |
1117 | *pref = ref->next; | |
1118 | spin_lock(&c->erase_completion_lock); | |
1119 | ref->next = c->xref_dead_list; | |
1120 | c->xref_dead_list = ref; | |
1121 | spin_unlock(&c->erase_completion_lock); | |
2c887e23 | 1122 | if (atomic_dec_and_test(&xd->refcnt)) |
8a13695c KK |
1123 | delete_xattr_datum(c, xd); |
1124 | } else { | |
1125 | ref->ic = ic; | |
1126 | ref->xd = xd; | |
1127 | ref->xseqno &= ~XREF_DELETE_MARKER; | |
1128 | } | |
aa98d7cf KK |
1129 | goto out; |
1130 | } | |
1131 | goto found; | |
1132 | } | |
1133 | } | |
1134 | /* not found */ | |
aa98d7cf KK |
1135 | if (flags & XATTR_REPLACE) { |
1136 | rc = -ENODATA; | |
1137 | goto out; | |
1138 | } | |
1139 | if (!buffer) { | |
c9f700f8 | 1140 | rc = -ENODATA; |
aa98d7cf KK |
1141 | goto out; |
1142 | } | |
1143 | found: | |
9fe4854c | 1144 | xd = create_xattr_datum(c, xprefix, xname, buffer, size); |
aa98d7cf KK |
1145 | if (IS_ERR(xd)) { |
1146 | rc = PTR_ERR(xd); | |
1147 | goto out; | |
1148 | } | |
1149 | up_write(&c->xattr_sem); | |
1150 | jffs2_complete_reservation(c); | |
1151 | ||
1152 | /* create xattr_ref */ | |
1153 | request = PAD(sizeof(struct jffs2_raw_xref)); | |
9fe4854c | 1154 | rc = jffs2_reserve_space(c, request, &length, |
aa98d7cf | 1155 | ALLOC_NORMAL, JFFS2_SUMMARY_XREF_SIZE); |
c9f700f8 | 1156 | down_write(&c->xattr_sem); |
aa98d7cf KK |
1157 | if (rc) { |
1158 | JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); | |
2c887e23 | 1159 | if (atomic_dec_and_test(&xd->refcnt)) |
8a13695c | 1160 | delete_xattr_datum(c, xd); |
aa98d7cf KK |
1161 | up_write(&c->xattr_sem); |
1162 | return rc; | |
1163 | } | |
8f2b6f49 KK |
1164 | if (ref) |
1165 | *pref = ref->next; | |
9fe4854c | 1166 | newref = create_xattr_ref(c, ic, xd); |
aa98d7cf | 1167 | if (IS_ERR(newref)) { |
8f2b6f49 KK |
1168 | if (ref) { |
1169 | ref->next = ic->xref; | |
1170 | ic->xref = ref; | |
1171 | } | |
aa98d7cf | 1172 | rc = PTR_ERR(newref); |
2c887e23 | 1173 | if (atomic_dec_and_test(&xd->refcnt)) |
8a13695c | 1174 | delete_xattr_datum(c, xd); |
aa98d7cf | 1175 | } else if (ref) { |
8a13695c | 1176 | delete_xattr_ref(c, ref); |
aa98d7cf KK |
1177 | } |
1178 | out: | |
1179 | up_write(&c->xattr_sem); | |
1180 | jffs2_complete_reservation(c); | |
1181 | return rc; | |
1182 | } | |
1183 | ||
1184 | /* -------- garbage collector functions ------------- | |
c9f700f8 | 1185 | * jffs2_garbage_collect_xattr_datum(c, xd, raw) |
aa98d7cf | 1186 | * is used to move xdatum into new node. |
c9f700f8 | 1187 | * jffs2_garbage_collect_xattr_ref(c, ref, raw) |
aa98d7cf | 1188 | * is used to move xref into new node. |
aa98d7cf KK |
1189 | * jffs2_verify_xattr(c) |
1190 | * is used to call do_verify_xattr_datum() before garbage collecting. | |
8a13695c KK |
1191 | * jffs2_release_xattr_datum(c, xd) |
1192 | * is used to release an in-memory object of xdatum. | |
1193 | * jffs2_release_xattr_ref(c, ref) | |
1194 | * is used to release an in-memory object of xref. | |
aa98d7cf | 1195 | * -------------------------------------------------- */ |
c9f700f8 KK |
1196 | int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, |
1197 | struct jffs2_raw_node_ref *raw) | |
aa98d7cf | 1198 | { |
9fe4854c | 1199 | uint32_t totlen, length, old_ofs; |
c9f700f8 | 1200 | int rc = 0; |
aa98d7cf | 1201 | |
084702e0 | 1202 | down_write(&c->xattr_sem); |
c9f700f8 KK |
1203 | if (xd->node != raw) |
1204 | goto out; | |
8a13695c | 1205 | if (xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID)) |
c9f700f8 | 1206 | goto out; |
aa98d7cf | 1207 | |
8a13695c KK |
1208 | rc = load_xattr_datum(c, xd); |
1209 | if (unlikely(rc)) { | |
1210 | rc = (rc > 0) ? 0 : rc; | |
1211 | goto out; | |
aa98d7cf | 1212 | } |
8a13695c KK |
1213 | old_ofs = ref_offset(xd->node); |
1214 | totlen = PAD(sizeof(struct jffs2_raw_xattr) | |
1215 | + xd->name_len + 1 + xd->value_len); | |
9fe4854c | 1216 | rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XATTR_SIZE); |
c9f700f8 KK |
1217 | if (rc) { |
1218 | JFFS2_WARNING("jffs2_reserve_space_gc()=%d, request=%u\n", rc, totlen); | |
084702e0 KK |
1219 | rc = rc ? rc : -EBADFD; |
1220 | goto out; | |
aa98d7cf | 1221 | } |
9fe4854c | 1222 | rc = save_xattr_datum(c, xd); |
aa98d7cf KK |
1223 | if (!rc) |
1224 | dbg_xattr("xdatum (xid=%u, version=%u) GC'ed from %#08x to %08x\n", | |
1225 | xd->xid, xd->version, old_ofs, ref_offset(xd->node)); | |
084702e0 | 1226 | out: |
c9f700f8 KK |
1227 | if (!rc) |
1228 | jffs2_mark_node_obsolete(c, raw); | |
084702e0 | 1229 | up_write(&c->xattr_sem); |
aa98d7cf KK |
1230 | return rc; |
1231 | } | |
1232 | ||
c9f700f8 KK |
1233 | int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, |
1234 | struct jffs2_raw_node_ref *raw) | |
aa98d7cf | 1235 | { |
9fe4854c | 1236 | uint32_t totlen, length, old_ofs; |
c9f700f8 | 1237 | int rc = 0; |
aa98d7cf | 1238 | |
084702e0 | 1239 | down_write(&c->xattr_sem); |
aa98d7cf KK |
1240 | BUG_ON(!ref->node); |
1241 | ||
c9f700f8 KK |
1242 | if (ref->node != raw) |
1243 | goto out; | |
1244 | if (is_xattr_ref_dead(ref) && (raw->next_in_ino == (void *)ref)) | |
1245 | goto out; | |
1246 | ||
aa98d7cf KK |
1247 | old_ofs = ref_offset(ref->node); |
1248 | totlen = ref_totlen(c, c->gcblock, ref->node); | |
084702e0 | 1249 | |
9fe4854c | 1250 | rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XREF_SIZE); |
c9f700f8 KK |
1251 | if (rc) { |
1252 | JFFS2_WARNING("%s: jffs2_reserve_space_gc() = %d, request = %u\n", | |
aa98d7cf | 1253 | __FUNCTION__, rc, totlen); |
084702e0 KK |
1254 | rc = rc ? rc : -EBADFD; |
1255 | goto out; | |
aa98d7cf | 1256 | } |
9fe4854c | 1257 | rc = save_xattr_ref(c, ref); |
aa98d7cf KK |
1258 | if (!rc) |
1259 | dbg_xattr("xref (ino=%u, xid=%u) GC'ed from %#08x to %08x\n", | |
1260 | ref->ic->ino, ref->xd->xid, old_ofs, ref_offset(ref->node)); | |
084702e0 | 1261 | out: |
c9f700f8 KK |
1262 | if (!rc) |
1263 | jffs2_mark_node_obsolete(c, raw); | |
084702e0 | 1264 | up_write(&c->xattr_sem); |
aa98d7cf KK |
1265 | return rc; |
1266 | } | |
1267 | ||
aa98d7cf KK |
1268 | int jffs2_verify_xattr(struct jffs2_sb_info *c) |
1269 | { | |
1270 | struct jffs2_xattr_datum *xd, *_xd; | |
c9f700f8 KK |
1271 | struct jffs2_eraseblock *jeb; |
1272 | struct jffs2_raw_node_ref *raw; | |
1273 | uint32_t totlen; | |
aa98d7cf KK |
1274 | int rc; |
1275 | ||
1276 | down_write(&c->xattr_sem); | |
1277 | list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) { | |
1278 | rc = do_verify_xattr_datum(c, xd); | |
c9f700f8 KK |
1279 | if (rc < 0) |
1280 | continue; | |
1281 | list_del_init(&xd->xindex); | |
1282 | spin_lock(&c->erase_completion_lock); | |
1283 | for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { | |
1284 | if (ref_flags(raw) != REF_UNCHECKED) | |
1285 | continue; | |
1286 | jeb = &c->blocks[ref_offset(raw) / c->sector_size]; | |
1287 | totlen = PAD(ref_totlen(c, jeb, raw)); | |
1288 | c->unchecked_size -= totlen; c->used_size += totlen; | |
1289 | jeb->unchecked_size -= totlen; jeb->used_size += totlen; | |
1290 | raw->flash_offset = ref_offset(raw) | |
1291 | | ((xd->node == (void *)raw) ? REF_PRISTINE : REF_NORMAL); | |
aa98d7cf | 1292 | } |
8a13695c | 1293 | if (xd->flags & JFFS2_XFLAGS_DEAD) |
c9f700f8 KK |
1294 | list_add(&xd->xindex, &c->xattr_dead_list); |
1295 | spin_unlock(&c->erase_completion_lock); | |
aa98d7cf KK |
1296 | } |
1297 | up_write(&c->xattr_sem); | |
aa98d7cf KK |
1298 | return list_empty(&c->xattr_unchecked) ? 1 : 0; |
1299 | } | |
c9f700f8 KK |
1300 | |
1301 | void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) | |
1302 | { | |
1303 | /* must be called under spin_lock(&c->erase_completion_lock) */ | |
2c887e23 | 1304 | if (atomic_read(&xd->refcnt) || xd->node != (void *)xd) |
c9f700f8 KK |
1305 | return; |
1306 | ||
1307 | list_del(&xd->xindex); | |
1308 | jffs2_free_xattr_datum(xd); | |
1309 | } | |
1310 | ||
1311 | void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) | |
1312 | { | |
1313 | /* must be called under spin_lock(&c->erase_completion_lock) */ | |
1314 | struct jffs2_xattr_ref *tmp, **ptmp; | |
1315 | ||
1316 | if (ref->node != (void *)ref) | |
1317 | return; | |
1318 | ||
1319 | for (tmp=c->xref_dead_list, ptmp=&c->xref_dead_list; tmp; ptmp=&tmp->next, tmp=tmp->next) { | |
1320 | if (ref == tmp) { | |
1321 | *ptmp = tmp->next; | |
c9f700f8 KK |
1322 | break; |
1323 | } | |
1324 | } | |
8a13695c | 1325 | jffs2_free_xattr_ref(ref); |
c9f700f8 | 1326 | } |