1652ecc20SKaiGai Kohei /* 2652ecc20SKaiGai Kohei * JFFS2 -- Journalling Flash File System, Version 2. 3aa98d7cfSKaiGai Kohei * 4c00c310eSDavid Woodhouse * Copyright © 2006 NEC Corporation 5aa98d7cfSKaiGai Kohei * 6652ecc20SKaiGai Kohei * Created by KaiGai Kohei <kaigai@ak.jp.nec.com> 7652ecc20SKaiGai Kohei * 8652ecc20SKaiGai Kohei * For licensing information, see the file 'LICENCE' in this directory. 9652ecc20SKaiGai Kohei * 10652ecc20SKaiGai Kohei */ 11c00c310eSDavid Woodhouse 129bbf29e4SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 139bbf29e4SJoe Perches 149824f75dSJean-Christophe DUBOIS #define JFFS2_XATTR_IS_CORRUPTED 1 159824f75dSJean-Christophe DUBOIS 16aa98d7cfSKaiGai Kohei #include <linux/kernel.h> 17aa98d7cfSKaiGai Kohei #include <linux/slab.h> 18aa98d7cfSKaiGai Kohei #include <linux/fs.h> 19aa98d7cfSKaiGai Kohei #include <linux/time.h> 20aa98d7cfSKaiGai Kohei #include <linux/pagemap.h> 21aa98d7cfSKaiGai Kohei #include <linux/highmem.h> 22aa98d7cfSKaiGai Kohei #include <linux/crc32.h> 23aa98d7cfSKaiGai Kohei #include <linux/jffs2.h> 24aa98d7cfSKaiGai Kohei #include <linux/xattr.h> 25aa98d7cfSKaiGai Kohei #include <linux/mtd/mtd.h> 26aa98d7cfSKaiGai Kohei #include "nodelist.h" 27aa98d7cfSKaiGai Kohei /* -------- xdatum related functions ---------------- 28aa98d7cfSKaiGai Kohei * xattr_datum_hashkey(xprefix, xname, xvalue, xsize) 29aa98d7cfSKaiGai Kohei * is used to calcurate xdatum hashkey. The reminder of hashkey into XATTRINDEX_HASHSIZE is 30aa98d7cfSKaiGai Kohei * the index of the xattr name/value pair cache (c->xattrindex). 31c9f700f8SKaiGai Kohei * is_xattr_datum_unchecked(c, xd) 32c9f700f8SKaiGai Kohei * returns 1, if xdatum contains any unchecked raw nodes. if all raw nodes are not 33c9f700f8SKaiGai Kohei * unchecked, it returns 0. 34aa98d7cfSKaiGai Kohei * unload_xattr_datum(c, xd) 35aa98d7cfSKaiGai Kohei * is used to release xattr name/value pair and detach from c->xattrindex. 36aa98d7cfSKaiGai Kohei * reclaim_xattr_datum(c) 37aa98d7cfSKaiGai Kohei * is used to reclaim xattr name/value pairs on the xattr name/value pair cache when 38af901ca1SAndré Goddard Rosa * memory usage by cache is over c->xdatum_mem_threshold. Currently, this threshold 39aa98d7cfSKaiGai Kohei * is hard coded as 32KiB. 40aa98d7cfSKaiGai Kohei * do_verify_xattr_datum(c, xd) 41aa98d7cfSKaiGai Kohei * is used to load the xdatum informations without name/value pair from the medium. 42aa98d7cfSKaiGai Kohei * It's necessary once, because those informations are not collected during mounting 43aa98d7cfSKaiGai Kohei * process when EBS is enabled. 44aa98d7cfSKaiGai Kohei * 0 will be returned, if success. An negative return value means recoverable error, and 45aa98d7cfSKaiGai Kohei * positive return value means unrecoverable error. Thus, caller must remove this xdatum 46aa98d7cfSKaiGai Kohei * and xref when it returned positive value. 47aa98d7cfSKaiGai Kohei * do_load_xattr_datum(c, xd) 48aa98d7cfSKaiGai Kohei * is used to load name/value pair from the medium. 49aa98d7cfSKaiGai Kohei * The meanings of return value is same as do_verify_xattr_datum(). 50aa98d7cfSKaiGai Kohei * load_xattr_datum(c, xd) 51aa98d7cfSKaiGai Kohei * is used to be as a wrapper of do_verify_xattr_datum() and do_load_xattr_datum(). 52aa98d7cfSKaiGai Kohei * If xd need to call do_verify_xattr_datum() at first, it's called before calling 53aa98d7cfSKaiGai Kohei * do_load_xattr_datum(). The meanings of return value is same as do_verify_xattr_datum(). 549fe4854cSDavid Woodhouse * save_xattr_datum(c, xd) 55aa98d7cfSKaiGai Kohei * is used to write xdatum to medium. xd->version will be incremented. 569fe4854cSDavid Woodhouse * create_xattr_datum(c, xprefix, xname, xvalue, xsize) 57aa98d7cfSKaiGai Kohei * is used to create new xdatum and write to medium. 58c6e8c6ccSKaiGai Kohei * unrefer_xattr_datum(c, xd) 59c6e8c6ccSKaiGai Kohei * is used to delete a xdatum. When nobody refers this xdatum, JFFS2_XFLAGS_DEAD 60c6e8c6ccSKaiGai Kohei * is set on xd->flags and chained xattr_dead_list or release it immediately. 61c6e8c6ccSKaiGai Kohei * In the first case, the garbage collector release it later. 62aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 63aa98d7cfSKaiGai Kohei static uint32_t xattr_datum_hashkey(int xprefix, const char *xname, const char *xvalue, int xsize) 64aa98d7cfSKaiGai Kohei { 65aa98d7cfSKaiGai Kohei int name_len = strlen(xname); 66aa98d7cfSKaiGai Kohei 67aa98d7cfSKaiGai Kohei return crc32(xprefix, xname, name_len) ^ crc32(xprefix, xvalue, xsize); 68aa98d7cfSKaiGai Kohei } 69aa98d7cfSKaiGai Kohei 70c9f700f8SKaiGai Kohei static int is_xattr_datum_unchecked(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 71c9f700f8SKaiGai Kohei { 72c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 73c9f700f8SKaiGai Kohei int rc = 0; 74c9f700f8SKaiGai Kohei 75c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 76c9f700f8SKaiGai Kohei for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { 77c9f700f8SKaiGai Kohei if (ref_flags(raw) == REF_UNCHECKED) { 78c9f700f8SKaiGai Kohei rc = 1; 79c9f700f8SKaiGai Kohei break; 80c9f700f8SKaiGai Kohei } 81c9f700f8SKaiGai Kohei } 82c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 83c9f700f8SKaiGai Kohei return rc; 84c9f700f8SKaiGai Kohei } 85c9f700f8SKaiGai Kohei 86aa98d7cfSKaiGai Kohei static void unload_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 87aa98d7cfSKaiGai Kohei { 88aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 898e24eea7SHarvey Harrison D1(dbg_xattr("%s: xid=%u, version=%u\n", __func__, xd->xid, xd->version)); 90aa98d7cfSKaiGai Kohei if (xd->xname) { 91aa98d7cfSKaiGai Kohei c->xdatum_mem_usage -= (xd->name_len + 1 + xd->value_len); 92aa98d7cfSKaiGai Kohei kfree(xd->xname); 93aa98d7cfSKaiGai Kohei } 94aa98d7cfSKaiGai Kohei 95aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 96aa98d7cfSKaiGai Kohei xd->hashkey = 0; 97aa98d7cfSKaiGai Kohei xd->xname = NULL; 98aa98d7cfSKaiGai Kohei xd->xvalue = NULL; 99aa98d7cfSKaiGai Kohei } 100aa98d7cfSKaiGai Kohei 101aa98d7cfSKaiGai Kohei static void reclaim_xattr_datum(struct jffs2_sb_info *c) 102aa98d7cfSKaiGai Kohei { 103aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 104aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 105aa98d7cfSKaiGai Kohei uint32_t target, before; 106aa98d7cfSKaiGai Kohei static int index = 0; 107aa98d7cfSKaiGai Kohei int count; 108aa98d7cfSKaiGai Kohei 109aa98d7cfSKaiGai Kohei if (c->xdatum_mem_threshold > c->xdatum_mem_usage) 110aa98d7cfSKaiGai Kohei return; 111aa98d7cfSKaiGai Kohei 112aa98d7cfSKaiGai Kohei before = c->xdatum_mem_usage; 113aa98d7cfSKaiGai Kohei target = c->xdatum_mem_usage * 4 / 5; /* 20% reduction */ 114aa98d7cfSKaiGai Kohei for (count = 0; count < XATTRINDEX_HASHSIZE; count++) { 115aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[index], xindex) { 116aa98d7cfSKaiGai Kohei if (xd->flags & JFFS2_XFLAGS_HOT) { 117aa98d7cfSKaiGai Kohei xd->flags &= ~JFFS2_XFLAGS_HOT; 118aa98d7cfSKaiGai Kohei } else if (!(xd->flags & JFFS2_XFLAGS_BIND)) { 119aa98d7cfSKaiGai Kohei unload_xattr_datum(c, xd); 120aa98d7cfSKaiGai Kohei } 121aa98d7cfSKaiGai Kohei if (c->xdatum_mem_usage <= target) 122aa98d7cfSKaiGai Kohei goto out; 123aa98d7cfSKaiGai Kohei } 124aa98d7cfSKaiGai Kohei index = (index+1) % XATTRINDEX_HASHSIZE; 125aa98d7cfSKaiGai Kohei } 126aa98d7cfSKaiGai Kohei out: 127aa98d7cfSKaiGai Kohei JFFS2_NOTICE("xdatum_mem_usage from %u byte to %u byte (%u byte reclaimed)\n", 128aa98d7cfSKaiGai Kohei before, c->xdatum_mem_usage, before - c->xdatum_mem_usage); 129aa98d7cfSKaiGai Kohei } 130aa98d7cfSKaiGai Kohei 131aa98d7cfSKaiGai Kohei static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 132aa98d7cfSKaiGai Kohei { 133aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 134aa98d7cfSKaiGai Kohei struct jffs2_eraseblock *jeb; 135c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 136aa98d7cfSKaiGai Kohei struct jffs2_raw_xattr rx; 137aa98d7cfSKaiGai Kohei size_t readlen; 138c9f700f8SKaiGai Kohei uint32_t crc, offset, totlen; 139aa98d7cfSKaiGai Kohei int rc; 140aa98d7cfSKaiGai Kohei 141c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 142c9f700f8SKaiGai Kohei offset = ref_offset(xd->node); 143c9f700f8SKaiGai Kohei if (ref_flags(xd->node) == REF_PRISTINE) 144c9f700f8SKaiGai Kohei goto complete; 145c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 146aa98d7cfSKaiGai Kohei 147c9f700f8SKaiGai Kohei rc = jffs2_flash_read(c, offset, sizeof(rx), &readlen, (char *)&rx); 148aa98d7cfSKaiGai Kohei if (rc || readlen != sizeof(rx)) { 14989291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu at %#08x\n", 150c9f700f8SKaiGai Kohei rc, sizeof(rx), readlen, offset); 151aa98d7cfSKaiGai Kohei return rc ? rc : -EIO; 152aa98d7cfSKaiGai Kohei } 153aa98d7cfSKaiGai Kohei crc = crc32(0, &rx, sizeof(rx) - 4); 154aa98d7cfSKaiGai Kohei if (crc != je32_to_cpu(rx.node_crc)) { 155aa98d7cfSKaiGai Kohei JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", 156c9f700f8SKaiGai Kohei offset, je32_to_cpu(rx.hdr_crc), crc); 157c9f700f8SKaiGai Kohei xd->flags |= JFFS2_XFLAGS_INVALID; 1589824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 159aa98d7cfSKaiGai Kohei } 1608a13695cSKaiGai Kohei totlen = PAD(sizeof(rx) + rx.name_len + 1 + je16_to_cpu(rx.value_len)); 161aa98d7cfSKaiGai Kohei if (je16_to_cpu(rx.magic) != JFFS2_MAGIC_BITMASK 162aa98d7cfSKaiGai Kohei || je16_to_cpu(rx.nodetype) != JFFS2_NODETYPE_XATTR 163aa98d7cfSKaiGai Kohei || je32_to_cpu(rx.totlen) != totlen 164aa98d7cfSKaiGai Kohei || je32_to_cpu(rx.xid) != xd->xid 165aa98d7cfSKaiGai Kohei || je32_to_cpu(rx.version) != xd->version) { 166aa98d7cfSKaiGai Kohei JFFS2_ERROR("inconsistent xdatum at %#08x, magic=%#04x/%#04x, " 167aa98d7cfSKaiGai Kohei "nodetype=%#04x/%#04x, totlen=%u/%u, xid=%u/%u, version=%u/%u\n", 168c9f700f8SKaiGai Kohei offset, je16_to_cpu(rx.magic), JFFS2_MAGIC_BITMASK, 169aa98d7cfSKaiGai Kohei je16_to_cpu(rx.nodetype), JFFS2_NODETYPE_XATTR, 170aa98d7cfSKaiGai Kohei je32_to_cpu(rx.totlen), totlen, 171aa98d7cfSKaiGai Kohei je32_to_cpu(rx.xid), xd->xid, 172aa98d7cfSKaiGai Kohei je32_to_cpu(rx.version), xd->version); 173c9f700f8SKaiGai Kohei xd->flags |= JFFS2_XFLAGS_INVALID; 1749824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 175aa98d7cfSKaiGai Kohei } 176aa98d7cfSKaiGai Kohei xd->xprefix = rx.xprefix; 177aa98d7cfSKaiGai Kohei xd->name_len = rx.name_len; 178aa98d7cfSKaiGai Kohei xd->value_len = je16_to_cpu(rx.value_len); 179aa98d7cfSKaiGai Kohei xd->data_crc = je32_to_cpu(rx.data_crc); 180aa98d7cfSKaiGai Kohei 181aa98d7cfSKaiGai Kohei spin_lock(&c->erase_completion_lock); 182c9f700f8SKaiGai Kohei complete: 183c9f700f8SKaiGai Kohei for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { 184c9f700f8SKaiGai Kohei jeb = &c->blocks[ref_offset(raw) / c->sector_size]; 185c9f700f8SKaiGai Kohei totlen = PAD(ref_totlen(c, jeb, raw)); 186c9f700f8SKaiGai Kohei if (ref_flags(raw) == REF_UNCHECKED) { 187aa98d7cfSKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 188aa98d7cfSKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 189c9f700f8SKaiGai Kohei } 190c9f700f8SKaiGai Kohei raw->flash_offset = ref_offset(raw) | ((xd->node==raw) ? REF_PRISTINE : REF_NORMAL); 191c9f700f8SKaiGai Kohei } 192aa98d7cfSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 193aa98d7cfSKaiGai Kohei 194aa98d7cfSKaiGai Kohei /* unchecked xdatum is chained with c->xattr_unchecked */ 195aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 196aa98d7cfSKaiGai Kohei 197aa98d7cfSKaiGai Kohei dbg_xattr("success on verfying xdatum (xid=%u, version=%u)\n", 198aa98d7cfSKaiGai Kohei xd->xid, xd->version); 199aa98d7cfSKaiGai Kohei 200aa98d7cfSKaiGai Kohei return 0; 201aa98d7cfSKaiGai Kohei } 202aa98d7cfSKaiGai Kohei 203aa98d7cfSKaiGai Kohei static int do_load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 204aa98d7cfSKaiGai Kohei { 205aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 206aa98d7cfSKaiGai Kohei char *data; 207aa98d7cfSKaiGai Kohei size_t readlen; 208aa98d7cfSKaiGai Kohei uint32_t crc, length; 209aa98d7cfSKaiGai Kohei int i, ret, retry = 0; 210aa98d7cfSKaiGai Kohei 211aa98d7cfSKaiGai Kohei BUG_ON(ref_flags(xd->node) != REF_PRISTINE); 212aa98d7cfSKaiGai Kohei BUG_ON(!list_empty(&xd->xindex)); 213aa98d7cfSKaiGai Kohei retry: 214aa98d7cfSKaiGai Kohei length = xd->name_len + 1 + xd->value_len; 215aa98d7cfSKaiGai Kohei data = kmalloc(length, GFP_KERNEL); 216aa98d7cfSKaiGai Kohei if (!data) 217aa98d7cfSKaiGai Kohei return -ENOMEM; 218aa98d7cfSKaiGai Kohei 219aa98d7cfSKaiGai Kohei ret = jffs2_flash_read(c, ref_offset(xd->node)+sizeof(struct jffs2_raw_xattr), 220aa98d7cfSKaiGai Kohei length, &readlen, data); 221aa98d7cfSKaiGai Kohei 222aa98d7cfSKaiGai Kohei if (ret || length!=readlen) { 22389291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_read() returned %d, request=%d, readlen=%zu, at %#08x\n", 224aa98d7cfSKaiGai Kohei ret, length, readlen, ref_offset(xd->node)); 225aa98d7cfSKaiGai Kohei kfree(data); 226aa98d7cfSKaiGai Kohei return ret ? ret : -EIO; 227aa98d7cfSKaiGai Kohei } 228aa98d7cfSKaiGai Kohei 229aa98d7cfSKaiGai Kohei data[xd->name_len] = '\0'; 230aa98d7cfSKaiGai Kohei crc = crc32(0, data, length); 231aa98d7cfSKaiGai Kohei if (crc != xd->data_crc) { 2329824f75dSJean-Christophe DUBOIS JFFS2_WARNING("node CRC failed (JFFS2_NODETYPE_XATTR)" 233aa98d7cfSKaiGai Kohei " at %#08x, read: 0x%08x calculated: 0x%08x\n", 234aa98d7cfSKaiGai Kohei ref_offset(xd->node), xd->data_crc, crc); 235aa98d7cfSKaiGai Kohei kfree(data); 236c9f700f8SKaiGai Kohei xd->flags |= JFFS2_XFLAGS_INVALID; 2379824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 238aa98d7cfSKaiGai Kohei } 239aa98d7cfSKaiGai Kohei 240aa98d7cfSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_HOT; 241aa98d7cfSKaiGai Kohei xd->xname = data; 242aa98d7cfSKaiGai Kohei xd->xvalue = data + xd->name_len+1; 243aa98d7cfSKaiGai Kohei 244aa98d7cfSKaiGai Kohei c->xdatum_mem_usage += length; 245aa98d7cfSKaiGai Kohei 246aa98d7cfSKaiGai Kohei xd->hashkey = xattr_datum_hashkey(xd->xprefix, xd->xname, xd->xvalue, xd->value_len); 247aa98d7cfSKaiGai Kohei i = xd->hashkey % XATTRINDEX_HASHSIZE; 248aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattrindex[i]); 249aa98d7cfSKaiGai Kohei if (!retry) { 250aa98d7cfSKaiGai Kohei retry = 1; 251aa98d7cfSKaiGai Kohei reclaim_xattr_datum(c); 252aa98d7cfSKaiGai Kohei if (!xd->xname) 253aa98d7cfSKaiGai Kohei goto retry; 254aa98d7cfSKaiGai Kohei } 255aa98d7cfSKaiGai Kohei 256aa98d7cfSKaiGai Kohei dbg_xattr("success on loading xdatum (xid=%u, xprefix=%u, xname='%s')\n", 257aa98d7cfSKaiGai Kohei xd->xid, xd->xprefix, xd->xname); 258aa98d7cfSKaiGai Kohei 259aa98d7cfSKaiGai Kohei return 0; 260aa98d7cfSKaiGai Kohei } 261aa98d7cfSKaiGai Kohei 262aa98d7cfSKaiGai Kohei static int load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 263aa98d7cfSKaiGai Kohei { 264aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem); 265aa98d7cfSKaiGai Kohei * rc < 0 : recoverable error, try again 266aa98d7cfSKaiGai Kohei * rc = 0 : success 267aa98d7cfSKaiGai Kohei * rc > 0 : Unrecoverable error, this node should be deleted. 268aa98d7cfSKaiGai Kohei */ 269aa98d7cfSKaiGai Kohei int rc = 0; 270c9f700f8SKaiGai Kohei 2718a13695cSKaiGai Kohei BUG_ON(xd->flags & JFFS2_XFLAGS_DEAD); 272c9f700f8SKaiGai Kohei if (xd->xname) 273c9f700f8SKaiGai Kohei return 0; 274c9f700f8SKaiGai Kohei if (xd->flags & JFFS2_XFLAGS_INVALID) 2759824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 276c9f700f8SKaiGai Kohei if (unlikely(is_xattr_datum_unchecked(c, xd))) 277aa98d7cfSKaiGai Kohei rc = do_verify_xattr_datum(c, xd); 278aa98d7cfSKaiGai Kohei if (!rc) 279aa98d7cfSKaiGai Kohei rc = do_load_xattr_datum(c, xd); 280aa98d7cfSKaiGai Kohei return rc; 281aa98d7cfSKaiGai Kohei } 282aa98d7cfSKaiGai Kohei 2839fe4854cSDavid Woodhouse static int save_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 284aa98d7cfSKaiGai Kohei { 285aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 2862f785402SDavid Woodhouse struct jffs2_raw_xattr rx; 287aa98d7cfSKaiGai Kohei struct kvec vecs[2]; 28889291a9dSDavid Woodhouse size_t length; 2898a13695cSKaiGai Kohei int rc, totlen; 2909fe4854cSDavid Woodhouse uint32_t phys_ofs = write_ofs(c); 291aa98d7cfSKaiGai Kohei 2928a13695cSKaiGai Kohei BUG_ON(!xd->xname); 2938a13695cSKaiGai Kohei BUG_ON(xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID)); 294aa98d7cfSKaiGai Kohei 295aa98d7cfSKaiGai Kohei vecs[0].iov_base = ℞ 2968a13695cSKaiGai Kohei vecs[0].iov_len = sizeof(rx); 297aa98d7cfSKaiGai Kohei vecs[1].iov_base = xd->xname; 298aa98d7cfSKaiGai Kohei vecs[1].iov_len = xd->name_len + 1 + xd->value_len; 2998a13695cSKaiGai Kohei totlen = vecs[0].iov_len + vecs[1].iov_len; 3008a13695cSKaiGai Kohei 301aa98d7cfSKaiGai Kohei /* Setup raw-xattr */ 302c9f700f8SKaiGai Kohei memset(&rx, 0, sizeof(rx)); 303aa98d7cfSKaiGai Kohei rx.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 304aa98d7cfSKaiGai Kohei rx.nodetype = cpu_to_je16(JFFS2_NODETYPE_XATTR); 305aa98d7cfSKaiGai Kohei rx.totlen = cpu_to_je32(PAD(totlen)); 306aa98d7cfSKaiGai Kohei rx.hdr_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_unknown_node) - 4)); 307aa98d7cfSKaiGai Kohei 308aa98d7cfSKaiGai Kohei rx.xid = cpu_to_je32(xd->xid); 309aa98d7cfSKaiGai Kohei rx.version = cpu_to_je32(++xd->version); 310aa98d7cfSKaiGai Kohei rx.xprefix = xd->xprefix; 311aa98d7cfSKaiGai Kohei rx.name_len = xd->name_len; 312aa98d7cfSKaiGai Kohei rx.value_len = cpu_to_je16(xd->value_len); 313aa98d7cfSKaiGai Kohei rx.data_crc = cpu_to_je32(crc32(0, vecs[1].iov_base, vecs[1].iov_len)); 314aa98d7cfSKaiGai Kohei rx.node_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_raw_xattr) - 4)); 315aa98d7cfSKaiGai Kohei 3168a13695cSKaiGai Kohei rc = jffs2_flash_writev(c, vecs, 2, phys_ofs, &length, 0); 317aa98d7cfSKaiGai Kohei if (rc || totlen != length) { 31889291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_writev()=%d, req=%u, wrote=%zu, at %#08x\n", 319aa98d7cfSKaiGai Kohei rc, totlen, length, phys_ofs); 320aa98d7cfSKaiGai Kohei rc = rc ? rc : -EIO; 3212f785402SDavid Woodhouse if (length) 3222f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(totlen), NULL); 3232f785402SDavid Woodhouse 324aa98d7cfSKaiGai Kohei return rc; 325aa98d7cfSKaiGai Kohei } 326aa98d7cfSKaiGai Kohei /* success */ 327c9f700f8SKaiGai Kohei jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(totlen), (void *)xd); 328aa98d7cfSKaiGai Kohei 329aa98d7cfSKaiGai Kohei dbg_xattr("success on saving xdatum (xid=%u, version=%u, xprefix=%u, xname='%s')\n", 330aa98d7cfSKaiGai Kohei xd->xid, xd->version, xd->xprefix, xd->xname); 331aa98d7cfSKaiGai Kohei 332aa98d7cfSKaiGai Kohei return 0; 333aa98d7cfSKaiGai Kohei } 334aa98d7cfSKaiGai Kohei 335aa98d7cfSKaiGai Kohei static struct jffs2_xattr_datum *create_xattr_datum(struct jffs2_sb_info *c, 336aa98d7cfSKaiGai Kohei int xprefix, const char *xname, 3379fe4854cSDavid Woodhouse const char *xvalue, int xsize) 338aa98d7cfSKaiGai Kohei { 339aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 340aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 341aa98d7cfSKaiGai Kohei uint32_t hashkey, name_len; 342aa98d7cfSKaiGai Kohei char *data; 343aa98d7cfSKaiGai Kohei int i, rc; 344aa98d7cfSKaiGai Kohei 345aa98d7cfSKaiGai Kohei /* Search xattr_datum has same xname/xvalue by index */ 346aa98d7cfSKaiGai Kohei hashkey = xattr_datum_hashkey(xprefix, xname, xvalue, xsize); 347aa98d7cfSKaiGai Kohei i = hashkey % XATTRINDEX_HASHSIZE; 348aa98d7cfSKaiGai Kohei list_for_each_entry(xd, &c->xattrindex[i], xindex) { 349aa98d7cfSKaiGai Kohei if (xd->hashkey==hashkey 350aa98d7cfSKaiGai Kohei && xd->xprefix==xprefix 351aa98d7cfSKaiGai Kohei && xd->value_len==xsize 352aa98d7cfSKaiGai Kohei && !strcmp(xd->xname, xname) 353aa98d7cfSKaiGai Kohei && !memcmp(xd->xvalue, xvalue, xsize)) { 3542c887e23SKaiGai Kohei atomic_inc(&xd->refcnt); 355aa98d7cfSKaiGai Kohei return xd; 356aa98d7cfSKaiGai Kohei } 357aa98d7cfSKaiGai Kohei } 358aa98d7cfSKaiGai Kohei 359aa98d7cfSKaiGai Kohei /* Not found, Create NEW XATTR-Cache */ 360aa98d7cfSKaiGai Kohei name_len = strlen(xname); 361aa98d7cfSKaiGai Kohei 362aa98d7cfSKaiGai Kohei xd = jffs2_alloc_xattr_datum(); 363aa98d7cfSKaiGai Kohei if (!xd) 364aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 365aa98d7cfSKaiGai Kohei 366aa98d7cfSKaiGai Kohei data = kmalloc(name_len + 1 + xsize, GFP_KERNEL); 367aa98d7cfSKaiGai Kohei if (!data) { 368aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 369aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 370aa98d7cfSKaiGai Kohei } 371aa98d7cfSKaiGai Kohei strcpy(data, xname); 372aa98d7cfSKaiGai Kohei memcpy(data + name_len + 1, xvalue, xsize); 373aa98d7cfSKaiGai Kohei 3742c887e23SKaiGai Kohei atomic_set(&xd->refcnt, 1); 375aa98d7cfSKaiGai Kohei xd->xid = ++c->highest_xid; 376aa98d7cfSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_HOT; 377aa98d7cfSKaiGai Kohei xd->xprefix = xprefix; 378aa98d7cfSKaiGai Kohei 379aa98d7cfSKaiGai Kohei xd->hashkey = hashkey; 380aa98d7cfSKaiGai Kohei xd->xname = data; 381aa98d7cfSKaiGai Kohei xd->xvalue = data + name_len + 1; 382aa98d7cfSKaiGai Kohei xd->name_len = name_len; 383aa98d7cfSKaiGai Kohei xd->value_len = xsize; 384aa98d7cfSKaiGai Kohei xd->data_crc = crc32(0, data, xd->name_len + 1 + xd->value_len); 385aa98d7cfSKaiGai Kohei 3869fe4854cSDavid Woodhouse rc = save_xattr_datum(c, xd); 387aa98d7cfSKaiGai Kohei if (rc) { 388aa98d7cfSKaiGai Kohei kfree(xd->xname); 389aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 390aa98d7cfSKaiGai Kohei return ERR_PTR(rc); 391aa98d7cfSKaiGai Kohei } 392aa98d7cfSKaiGai Kohei 393aa98d7cfSKaiGai Kohei /* Insert Hash Index */ 394aa98d7cfSKaiGai Kohei i = hashkey % XATTRINDEX_HASHSIZE; 395aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattrindex[i]); 396aa98d7cfSKaiGai Kohei 397aa98d7cfSKaiGai Kohei c->xdatum_mem_usage += (xd->name_len + 1 + xd->value_len); 398aa98d7cfSKaiGai Kohei reclaim_xattr_datum(c); 399aa98d7cfSKaiGai Kohei 400aa98d7cfSKaiGai Kohei return xd; 401aa98d7cfSKaiGai Kohei } 402aa98d7cfSKaiGai Kohei 403c6e8c6ccSKaiGai Kohei static void unrefer_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 404c9f700f8SKaiGai Kohei { 405c9f700f8SKaiGai Kohei /* must be called under down_write(xattr_sem) */ 406c6e8c6ccSKaiGai Kohei if (atomic_dec_and_lock(&xd->refcnt, &c->erase_completion_lock)) { 407c9f700f8SKaiGai Kohei unload_xattr_datum(c, xd); 4088a13695cSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_DEAD; 4098a13695cSKaiGai Kohei if (xd->node == (void *)xd) { 4108a13695cSKaiGai Kohei BUG_ON(!(xd->flags & JFFS2_XFLAGS_INVALID)); 4118a13695cSKaiGai Kohei jffs2_free_xattr_datum(xd); 4128a13695cSKaiGai Kohei } else { 413c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_dead_list); 414c9f700f8SKaiGai Kohei } 415c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 416c6e8c6ccSKaiGai Kohei 417a6b1d82dSJeff Garzik dbg_xattr("xdatum(xid=%u, version=%u) was removed.\n", 418a6b1d82dSJeff Garzik xd->xid, xd->version); 419c6e8c6ccSKaiGai Kohei } 420c9f700f8SKaiGai Kohei } 421c9f700f8SKaiGai Kohei 42221b9879bSKaiGai Kohei /* -------- xref related functions ------------------ 423aa98d7cfSKaiGai Kohei * verify_xattr_ref(c, ref) 424aa98d7cfSKaiGai Kohei * is used to load xref information from medium. Because summary data does not 425aa98d7cfSKaiGai Kohei * contain xid/ino, it's necessary to verify once while mounting process. 4269fe4854cSDavid Woodhouse * save_xattr_ref(c, ref) 4278a13695cSKaiGai Kohei * is used to write xref to medium. If delete marker is marked, it write 4288a13695cSKaiGai Kohei * a delete marker of xref into medium. 4299fe4854cSDavid Woodhouse * create_xattr_ref(c, ic, xd) 430aa98d7cfSKaiGai Kohei * is used to create a new xref and write to medium. 4318a13695cSKaiGai Kohei * delete_xattr_ref(c, ref) 4328a13695cSKaiGai Kohei * is used to delete jffs2_xattr_ref. It marks xref XREF_DELETE_MARKER, 4338a13695cSKaiGai Kohei * and allows GC to reclaim those physical nodes. 434aa98d7cfSKaiGai Kohei * jffs2_xattr_delete_inode(c, ic) 435aa98d7cfSKaiGai Kohei * is called to remove xrefs related to obsolete inode when inode is unlinked. 436aa98d7cfSKaiGai Kohei * jffs2_xattr_free_inode(c, ic) 437aa98d7cfSKaiGai Kohei * is called to release xattr related objects when unmounting. 4388f2b6f49SKaiGai Kohei * check_xattr_ref_inode(c, ic) 439aa98d7cfSKaiGai Kohei * is used to confirm inode does not have duplicate xattr name/value pair. 440aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 441aa98d7cfSKaiGai Kohei static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 442aa98d7cfSKaiGai Kohei { 443aa98d7cfSKaiGai Kohei struct jffs2_eraseblock *jeb; 444c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 445aa98d7cfSKaiGai Kohei struct jffs2_raw_xref rr; 446aa98d7cfSKaiGai Kohei size_t readlen; 447c9f700f8SKaiGai Kohei uint32_t crc, offset, totlen; 448aa98d7cfSKaiGai Kohei int rc; 449aa98d7cfSKaiGai Kohei 450c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 451c9f700f8SKaiGai Kohei if (ref_flags(ref->node) != REF_UNCHECKED) 452c9f700f8SKaiGai Kohei goto complete; 453c9f700f8SKaiGai Kohei offset = ref_offset(ref->node); 454c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 455aa98d7cfSKaiGai Kohei 456c9f700f8SKaiGai Kohei rc = jffs2_flash_read(c, offset, sizeof(rr), &readlen, (char *)&rr); 457aa98d7cfSKaiGai Kohei if (rc || sizeof(rr) != readlen) { 45889291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu, at %#08x\n", 459c9f700f8SKaiGai Kohei rc, sizeof(rr), readlen, offset); 460aa98d7cfSKaiGai Kohei return rc ? rc : -EIO; 461aa98d7cfSKaiGai Kohei } 462aa98d7cfSKaiGai Kohei /* obsolete node */ 463aa98d7cfSKaiGai Kohei crc = crc32(0, &rr, sizeof(rr) - 4); 464aa98d7cfSKaiGai Kohei if (crc != je32_to_cpu(rr.node_crc)) { 465aa98d7cfSKaiGai Kohei JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", 466c9f700f8SKaiGai Kohei offset, je32_to_cpu(rr.node_crc), crc); 4679824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 468aa98d7cfSKaiGai Kohei } 469aa98d7cfSKaiGai Kohei if (je16_to_cpu(rr.magic) != JFFS2_MAGIC_BITMASK 470aa98d7cfSKaiGai Kohei || je16_to_cpu(rr.nodetype) != JFFS2_NODETYPE_XREF 471aa98d7cfSKaiGai Kohei || je32_to_cpu(rr.totlen) != PAD(sizeof(rr))) { 472aa98d7cfSKaiGai Kohei JFFS2_ERROR("inconsistent xref at %#08x, magic=%#04x/%#04x, " 47389291a9dSDavid Woodhouse "nodetype=%#04x/%#04x, totlen=%u/%zu\n", 474c9f700f8SKaiGai Kohei offset, je16_to_cpu(rr.magic), JFFS2_MAGIC_BITMASK, 475aa98d7cfSKaiGai Kohei je16_to_cpu(rr.nodetype), JFFS2_NODETYPE_XREF, 476aa98d7cfSKaiGai Kohei je32_to_cpu(rr.totlen), PAD(sizeof(rr))); 4779824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 478aa98d7cfSKaiGai Kohei } 479aa98d7cfSKaiGai Kohei ref->ino = je32_to_cpu(rr.ino); 480aa98d7cfSKaiGai Kohei ref->xid = je32_to_cpu(rr.xid); 481c9f700f8SKaiGai Kohei ref->xseqno = je32_to_cpu(rr.xseqno); 482c9f700f8SKaiGai Kohei if (ref->xseqno > c->highest_xseqno) 483c9f700f8SKaiGai Kohei c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER); 484aa98d7cfSKaiGai Kohei 485aa98d7cfSKaiGai Kohei spin_lock(&c->erase_completion_lock); 486c9f700f8SKaiGai Kohei complete: 487c9f700f8SKaiGai Kohei for (raw=ref->node; raw != (void *)ref; raw=raw->next_in_ino) { 488c9f700f8SKaiGai Kohei jeb = &c->blocks[ref_offset(raw) / c->sector_size]; 489c9f700f8SKaiGai Kohei totlen = PAD(ref_totlen(c, jeb, raw)); 490c9f700f8SKaiGai Kohei if (ref_flags(raw) == REF_UNCHECKED) { 491aa98d7cfSKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 492aa98d7cfSKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 493c9f700f8SKaiGai Kohei } 494c9f700f8SKaiGai Kohei raw->flash_offset = ref_offset(raw) | ((ref->node==raw) ? REF_PRISTINE : REF_NORMAL); 495c9f700f8SKaiGai Kohei } 496aa98d7cfSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 497aa98d7cfSKaiGai Kohei 498aa98d7cfSKaiGai Kohei dbg_xattr("success on verifying xref (ino=%u, xid=%u) at %#08x\n", 499aa98d7cfSKaiGai Kohei ref->ino, ref->xid, ref_offset(ref->node)); 500aa98d7cfSKaiGai Kohei return 0; 501aa98d7cfSKaiGai Kohei } 502aa98d7cfSKaiGai Kohei 5039fe4854cSDavid Woodhouse static int save_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 504aa98d7cfSKaiGai Kohei { 505aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 506aa98d7cfSKaiGai Kohei struct jffs2_raw_xref rr; 50789291a9dSDavid Woodhouse size_t length; 508c9f700f8SKaiGai Kohei uint32_t xseqno, phys_ofs = write_ofs(c); 509aa98d7cfSKaiGai Kohei int ret; 510aa98d7cfSKaiGai Kohei 511aa98d7cfSKaiGai Kohei rr.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 512aa98d7cfSKaiGai Kohei rr.nodetype = cpu_to_je16(JFFS2_NODETYPE_XREF); 513aa98d7cfSKaiGai Kohei rr.totlen = cpu_to_je32(PAD(sizeof(rr))); 514aa98d7cfSKaiGai Kohei rr.hdr_crc = cpu_to_je32(crc32(0, &rr, sizeof(struct jffs2_unknown_node) - 4)); 515aa98d7cfSKaiGai Kohei 516c9f700f8SKaiGai Kohei xseqno = (c->highest_xseqno += 2); 517c9f700f8SKaiGai Kohei if (is_xattr_ref_dead(ref)) { 518c9f700f8SKaiGai Kohei xseqno |= XREF_DELETE_MARKER; 519c9f700f8SKaiGai Kohei rr.ino = cpu_to_je32(ref->ino); 520c9f700f8SKaiGai Kohei rr.xid = cpu_to_je32(ref->xid); 521c9f700f8SKaiGai Kohei } else { 522aa98d7cfSKaiGai Kohei rr.ino = cpu_to_je32(ref->ic->ino); 523aa98d7cfSKaiGai Kohei rr.xid = cpu_to_je32(ref->xd->xid); 524c9f700f8SKaiGai Kohei } 525c9f700f8SKaiGai Kohei rr.xseqno = cpu_to_je32(xseqno); 526aa98d7cfSKaiGai Kohei rr.node_crc = cpu_to_je32(crc32(0, &rr, sizeof(rr) - 4)); 527aa98d7cfSKaiGai Kohei 528aa98d7cfSKaiGai Kohei ret = jffs2_flash_write(c, phys_ofs, sizeof(rr), &length, (char *)&rr); 529aa98d7cfSKaiGai Kohei if (ret || sizeof(rr) != length) { 53089291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_write() returned %d, request=%zu, retlen=%zu, at %#08x\n", 531aa98d7cfSKaiGai Kohei ret, sizeof(rr), length, phys_ofs); 532aa98d7cfSKaiGai Kohei ret = ret ? ret : -EIO; 5332f785402SDavid Woodhouse if (length) 5342f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(sizeof(rr)), NULL); 5352f785402SDavid Woodhouse 536aa98d7cfSKaiGai Kohei return ret; 537aa98d7cfSKaiGai Kohei } 538c9f700f8SKaiGai Kohei /* success */ 539c9f700f8SKaiGai Kohei ref->xseqno = xseqno; 540c9f700f8SKaiGai Kohei jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(sizeof(rr)), (void *)ref); 541aa98d7cfSKaiGai Kohei 542aa98d7cfSKaiGai Kohei dbg_xattr("success on saving xref (ino=%u, xid=%u)\n", ref->ic->ino, ref->xd->xid); 543aa98d7cfSKaiGai Kohei 544aa98d7cfSKaiGai Kohei return 0; 545aa98d7cfSKaiGai Kohei } 546aa98d7cfSKaiGai Kohei 547aa98d7cfSKaiGai Kohei static struct jffs2_xattr_ref *create_xattr_ref(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, 5489fe4854cSDavid Woodhouse struct jffs2_xattr_datum *xd) 549aa98d7cfSKaiGai Kohei { 550aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 551aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref; 552aa98d7cfSKaiGai Kohei int ret; 553aa98d7cfSKaiGai Kohei 554aa98d7cfSKaiGai Kohei ref = jffs2_alloc_xattr_ref(); 555aa98d7cfSKaiGai Kohei if (!ref) 556aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 557aa98d7cfSKaiGai Kohei ref->ic = ic; 558aa98d7cfSKaiGai Kohei ref->xd = xd; 559aa98d7cfSKaiGai Kohei 5609fe4854cSDavid Woodhouse ret = save_xattr_ref(c, ref); 561aa98d7cfSKaiGai Kohei if (ret) { 562aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 563aa98d7cfSKaiGai Kohei return ERR_PTR(ret); 564aa98d7cfSKaiGai Kohei } 565aa98d7cfSKaiGai Kohei 566aa98d7cfSKaiGai Kohei /* Chain to inode */ 5678f2b6f49SKaiGai Kohei ref->next = ic->xref; 5688f2b6f49SKaiGai Kohei ic->xref = ref; 569aa98d7cfSKaiGai Kohei 570aa98d7cfSKaiGai Kohei return ref; /* success */ 571aa98d7cfSKaiGai Kohei } 572aa98d7cfSKaiGai Kohei 5738a13695cSKaiGai Kohei static void delete_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 574c9f700f8SKaiGai Kohei { 575c9f700f8SKaiGai Kohei /* must be called under down_write(xattr_sem) */ 576c9f700f8SKaiGai Kohei struct jffs2_xattr_datum *xd; 577c9f700f8SKaiGai Kohei 578c9f700f8SKaiGai Kohei xd = ref->xd; 5798a13695cSKaiGai Kohei ref->xseqno |= XREF_DELETE_MARKER; 580c9f700f8SKaiGai Kohei ref->ino = ref->ic->ino; 581c9f700f8SKaiGai Kohei ref->xid = ref->xd->xid; 582c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 583c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 584c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 585c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 586c9f700f8SKaiGai Kohei 5878a13695cSKaiGai Kohei dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) was removed.\n", 5888a13695cSKaiGai Kohei ref->ino, ref->xid, ref->xseqno); 589c9f700f8SKaiGai Kohei 590c6e8c6ccSKaiGai Kohei unrefer_xattr_datum(c, xd); 591c9f700f8SKaiGai Kohei } 592c9f700f8SKaiGai Kohei 593aa98d7cfSKaiGai Kohei void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 594aa98d7cfSKaiGai Kohei { 595b57922d9SAl Viro /* It's called from jffs2_evict_inode() on inode removing. 596aa98d7cfSKaiGai Kohei When an inode with XATTR is removed, those XATTRs must be removed. */ 5978a13695cSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 598aa98d7cfSKaiGai Kohei 59927c72b04SDavid Woodhouse if (!ic || ic->pino_nlink > 0) 600aa98d7cfSKaiGai Kohei return; 601aa98d7cfSKaiGai Kohei 602c9f700f8SKaiGai Kohei down_write(&c->xattr_sem); 6038a13695cSKaiGai Kohei for (ref = ic->xref; ref; ref = _ref) { 6048a13695cSKaiGai Kohei _ref = ref->next; 6058a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 606c9f700f8SKaiGai Kohei } 6078a13695cSKaiGai Kohei ic->xref = NULL; 608aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 609aa98d7cfSKaiGai Kohei } 610aa98d7cfSKaiGai Kohei 611aa98d7cfSKaiGai Kohei void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 612aa98d7cfSKaiGai Kohei { 613aa98d7cfSKaiGai Kohei /* It's called from jffs2_free_ino_caches() until unmounting FS. */ 614aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 615aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 616aa98d7cfSKaiGai Kohei 617aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 6188f2b6f49SKaiGai Kohei for (ref = ic->xref; ref; ref = _ref) { 6198f2b6f49SKaiGai Kohei _ref = ref->next; 620aa98d7cfSKaiGai Kohei xd = ref->xd; 6212c887e23SKaiGai Kohei if (atomic_dec_and_test(&xd->refcnt)) { 622aa98d7cfSKaiGai Kohei unload_xattr_datum(c, xd); 623aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 624aa98d7cfSKaiGai Kohei } 625aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 626aa98d7cfSKaiGai Kohei } 6278f2b6f49SKaiGai Kohei ic->xref = NULL; 628aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 629aa98d7cfSKaiGai Kohei } 630aa98d7cfSKaiGai Kohei 6318f2b6f49SKaiGai Kohei static int check_xattr_ref_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 632aa98d7cfSKaiGai Kohei { 633a4ce96acSLinus Torvalds /* success of check_xattr_ref_inode() means that inode (ic) dose not have 634aa98d7cfSKaiGai Kohei * duplicate name/value pairs. If duplicate name/value pair would be found, 635aa98d7cfSKaiGai Kohei * one will be removed. 636aa98d7cfSKaiGai Kohei */ 637c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *ref, *cmp, **pref, **pcmp; 638aa98d7cfSKaiGai Kohei int rc = 0; 639aa98d7cfSKaiGai Kohei 640aa98d7cfSKaiGai Kohei if (likely(ic->flags & INO_FLAGS_XATTR_CHECKED)) 641aa98d7cfSKaiGai Kohei return 0; 642aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 643aa98d7cfSKaiGai Kohei retry: 644aa98d7cfSKaiGai Kohei rc = 0; 6458f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 646aa98d7cfSKaiGai Kohei if (!ref->xd->xname) { 647aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, ref->xd); 648aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 6498f2b6f49SKaiGai Kohei *pref = ref->next; 6508a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 651aa98d7cfSKaiGai Kohei goto retry; 652aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 653aa98d7cfSKaiGai Kohei goto out; 654aa98d7cfSKaiGai Kohei } 655c9f700f8SKaiGai Kohei for (cmp=ref->next, pcmp=&ref->next; cmp; pcmp=&cmp->next, cmp=cmp->next) { 656aa98d7cfSKaiGai Kohei if (!cmp->xd->xname) { 657aa98d7cfSKaiGai Kohei ref->xd->flags |= JFFS2_XFLAGS_BIND; 658aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, cmp->xd); 659aa98d7cfSKaiGai Kohei ref->xd->flags &= ~JFFS2_XFLAGS_BIND; 660aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 661c9f700f8SKaiGai Kohei *pcmp = cmp->next; 6628a13695cSKaiGai Kohei delete_xattr_ref(c, cmp); 663aa98d7cfSKaiGai Kohei goto retry; 664aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 665aa98d7cfSKaiGai Kohei goto out; 666aa98d7cfSKaiGai Kohei } 667aa98d7cfSKaiGai Kohei if (ref->xd->xprefix == cmp->xd->xprefix 668aa98d7cfSKaiGai Kohei && !strcmp(ref->xd->xname, cmp->xd->xname)) { 669c9f700f8SKaiGai Kohei if (ref->xseqno > cmp->xseqno) { 670c9f700f8SKaiGai Kohei *pcmp = cmp->next; 6718a13695cSKaiGai Kohei delete_xattr_ref(c, cmp); 672c9f700f8SKaiGai Kohei } else { 673c9f700f8SKaiGai Kohei *pref = ref->next; 6748a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 675c9f700f8SKaiGai Kohei } 676aa98d7cfSKaiGai Kohei goto retry; 677aa98d7cfSKaiGai Kohei } 678aa98d7cfSKaiGai Kohei } 679aa98d7cfSKaiGai Kohei } 680aa98d7cfSKaiGai Kohei ic->flags |= INO_FLAGS_XATTR_CHECKED; 681aa98d7cfSKaiGai Kohei out: 682aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 683aa98d7cfSKaiGai Kohei 684aa98d7cfSKaiGai Kohei return rc; 685aa98d7cfSKaiGai Kohei } 686aa98d7cfSKaiGai Kohei 687aa98d7cfSKaiGai Kohei /* -------- xattr subsystem functions --------------- 688aa98d7cfSKaiGai Kohei * jffs2_init_xattr_subsystem(c) 689aa98d7cfSKaiGai Kohei * is used to initialize semaphore and list_head, and some variables. 690aa98d7cfSKaiGai Kohei * jffs2_find_xattr_datum(c, xid) 691aa98d7cfSKaiGai Kohei * is used to lookup xdatum while scanning process. 692aa98d7cfSKaiGai Kohei * jffs2_clear_xattr_subsystem(c) 693aa98d7cfSKaiGai Kohei * is used to release any xattr related objects. 694aa98d7cfSKaiGai Kohei * jffs2_build_xattr_subsystem(c) 695aa98d7cfSKaiGai Kohei * is used to associate xdatum and xref while super block building process. 696aa98d7cfSKaiGai Kohei * jffs2_setup_xattr_datum(c, xid, version) 697aa98d7cfSKaiGai Kohei * is used to insert xdatum while scanning process. 698aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 699aa98d7cfSKaiGai Kohei void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c) 700aa98d7cfSKaiGai Kohei { 701aa98d7cfSKaiGai Kohei int i; 702aa98d7cfSKaiGai Kohei 703aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) 704aa98d7cfSKaiGai Kohei INIT_LIST_HEAD(&c->xattrindex[i]); 705aa98d7cfSKaiGai Kohei INIT_LIST_HEAD(&c->xattr_unchecked); 706c9f700f8SKaiGai Kohei INIT_LIST_HEAD(&c->xattr_dead_list); 707c9f700f8SKaiGai Kohei c->xref_dead_list = NULL; 7088f2b6f49SKaiGai Kohei c->xref_temp = NULL; 709aa98d7cfSKaiGai Kohei 710aa98d7cfSKaiGai Kohei init_rwsem(&c->xattr_sem); 711c9f700f8SKaiGai Kohei c->highest_xid = 0; 712c9f700f8SKaiGai Kohei c->highest_xseqno = 0; 713aa98d7cfSKaiGai Kohei c->xdatum_mem_usage = 0; 714aa98d7cfSKaiGai Kohei c->xdatum_mem_threshold = 32 * 1024; /* Default 32KB */ 715aa98d7cfSKaiGai Kohei } 716aa98d7cfSKaiGai Kohei 717aa98d7cfSKaiGai Kohei static struct jffs2_xattr_datum *jffs2_find_xattr_datum(struct jffs2_sb_info *c, uint32_t xid) 718aa98d7cfSKaiGai Kohei { 719aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 720aa98d7cfSKaiGai Kohei int i = xid % XATTRINDEX_HASHSIZE; 721aa98d7cfSKaiGai Kohei 722aa98d7cfSKaiGai Kohei /* It's only used in scanning/building process. */ 723aa98d7cfSKaiGai Kohei BUG_ON(!(c->flags & (JFFS2_SB_FLAG_SCANNING|JFFS2_SB_FLAG_BUILDING))); 724aa98d7cfSKaiGai Kohei 725aa98d7cfSKaiGai Kohei list_for_each_entry(xd, &c->xattrindex[i], xindex) { 726aa98d7cfSKaiGai Kohei if (xd->xid==xid) 727aa98d7cfSKaiGai Kohei return xd; 728aa98d7cfSKaiGai Kohei } 729aa98d7cfSKaiGai Kohei return NULL; 730aa98d7cfSKaiGai Kohei } 731aa98d7cfSKaiGai Kohei 732aa98d7cfSKaiGai Kohei void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c) 733aa98d7cfSKaiGai Kohei { 734aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 735aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 736aa98d7cfSKaiGai Kohei int i; 737aa98d7cfSKaiGai Kohei 7388f2b6f49SKaiGai Kohei for (ref=c->xref_temp; ref; ref = _ref) { 7398f2b6f49SKaiGai Kohei _ref = ref->next; 740aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 7418f2b6f49SKaiGai Kohei } 742c9f700f8SKaiGai Kohei 743c9f700f8SKaiGai Kohei for (ref=c->xref_dead_list; ref; ref = _ref) { 744c9f700f8SKaiGai Kohei _ref = ref->next; 745c9f700f8SKaiGai Kohei jffs2_free_xattr_ref(ref); 746c9f700f8SKaiGai Kohei } 747aa98d7cfSKaiGai Kohei 748aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) { 749aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { 750aa98d7cfSKaiGai Kohei list_del(&xd->xindex); 751aa98d7cfSKaiGai Kohei if (xd->xname) 752aa98d7cfSKaiGai Kohei kfree(xd->xname); 753aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 754aa98d7cfSKaiGai Kohei } 755aa98d7cfSKaiGai Kohei } 756c9f700f8SKaiGai Kohei 757c9f700f8SKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattr_dead_list, xindex) { 758c9f700f8SKaiGai Kohei list_del(&xd->xindex); 759c9f700f8SKaiGai Kohei jffs2_free_xattr_datum(xd); 760c9f700f8SKaiGai Kohei } 7612ad8ee71SDavid Woodhouse list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) { 7622ad8ee71SDavid Woodhouse list_del(&xd->xindex); 7632ad8ee71SDavid Woodhouse jffs2_free_xattr_datum(xd); 7642ad8ee71SDavid Woodhouse } 765aa98d7cfSKaiGai Kohei } 766aa98d7cfSKaiGai Kohei 767c9f700f8SKaiGai Kohei #define XREF_TMPHASH_SIZE (128) 768aa98d7cfSKaiGai Kohei void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c) 769aa98d7cfSKaiGai Kohei { 770aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 771c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *xref_tmphash[XREF_TMPHASH_SIZE]; 772aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 773aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic; 774c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 775aa98d7cfSKaiGai Kohei int i, xdatum_count = 0, xdatum_unchecked_count = 0, xref_count = 0; 7768a13695cSKaiGai Kohei int xdatum_orphan_count = 0, xref_orphan_count = 0, xref_dead_count = 0; 777aa98d7cfSKaiGai Kohei 778aa98d7cfSKaiGai Kohei BUG_ON(!(c->flags & JFFS2_SB_FLAG_BUILDING)); 779aa98d7cfSKaiGai Kohei 7808a13695cSKaiGai Kohei /* Phase.1 : Merge same xref */ 781c9f700f8SKaiGai Kohei for (i=0; i < XREF_TMPHASH_SIZE; i++) 782c9f700f8SKaiGai Kohei xref_tmphash[i] = NULL; 7838f2b6f49SKaiGai Kohei for (ref=c->xref_temp; ref; ref=_ref) { 784c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *tmp; 785c9f700f8SKaiGai Kohei 7868f2b6f49SKaiGai Kohei _ref = ref->next; 787aa98d7cfSKaiGai Kohei if (ref_flags(ref->node) != REF_PRISTINE) { 788aa98d7cfSKaiGai Kohei if (verify_xattr_ref(c, ref)) { 789c9f700f8SKaiGai Kohei BUG_ON(ref->node->next_in_ino != (void *)ref); 790c9f700f8SKaiGai Kohei ref->node->next_in_ino = NULL; 791c9f700f8SKaiGai Kohei jffs2_mark_node_obsolete(c, ref->node); 792aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 793aa98d7cfSKaiGai Kohei continue; 794aa98d7cfSKaiGai Kohei } 795aa98d7cfSKaiGai Kohei } 796c9f700f8SKaiGai Kohei 797c9f700f8SKaiGai Kohei i = (ref->ino ^ ref->xid) % XREF_TMPHASH_SIZE; 798c9f700f8SKaiGai Kohei for (tmp=xref_tmphash[i]; tmp; tmp=tmp->next) { 799c9f700f8SKaiGai Kohei if (tmp->ino == ref->ino && tmp->xid == ref->xid) 800c9f700f8SKaiGai Kohei break; 801c9f700f8SKaiGai Kohei } 802c9f700f8SKaiGai Kohei if (tmp) { 803c9f700f8SKaiGai Kohei raw = ref->node; 804c9f700f8SKaiGai Kohei if (ref->xseqno > tmp->xseqno) { 805c9f700f8SKaiGai Kohei tmp->xseqno = ref->xseqno; 806c9f700f8SKaiGai Kohei raw->next_in_ino = tmp->node; 807c9f700f8SKaiGai Kohei tmp->node = raw; 808c9f700f8SKaiGai Kohei } else { 809c9f700f8SKaiGai Kohei raw->next_in_ino = tmp->node->next_in_ino; 810c9f700f8SKaiGai Kohei tmp->node->next_in_ino = raw; 811c9f700f8SKaiGai Kohei } 812c9f700f8SKaiGai Kohei jffs2_free_xattr_ref(ref); 813c9f700f8SKaiGai Kohei continue; 814c9f700f8SKaiGai Kohei } else { 815c9f700f8SKaiGai Kohei ref->next = xref_tmphash[i]; 816c9f700f8SKaiGai Kohei xref_tmphash[i] = ref; 817c9f700f8SKaiGai Kohei } 818c9f700f8SKaiGai Kohei } 819c9f700f8SKaiGai Kohei c->xref_temp = NULL; 820c9f700f8SKaiGai Kohei 8218a13695cSKaiGai Kohei /* Phase.2 : Bind xref with inode_cache and xattr_datum */ 822c9f700f8SKaiGai Kohei for (i=0; i < XREF_TMPHASH_SIZE; i++) { 823c9f700f8SKaiGai Kohei for (ref=xref_tmphash[i]; ref; ref=_ref) { 8248a13695cSKaiGai Kohei xref_count++; 825c9f700f8SKaiGai Kohei _ref = ref->next; 826c9f700f8SKaiGai Kohei if (is_xattr_ref_dead(ref)) { 827c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 828c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 8298a13695cSKaiGai Kohei xref_dead_count++; 830c9f700f8SKaiGai Kohei continue; 831c9f700f8SKaiGai Kohei } 832aa98d7cfSKaiGai Kohei /* At this point, ref->xid and ref->ino contain XID and inode number. 833aa98d7cfSKaiGai Kohei ref->xd and ref->ic are not valid yet. */ 834aa98d7cfSKaiGai Kohei xd = jffs2_find_xattr_datum(c, ref->xid); 835aa98d7cfSKaiGai Kohei ic = jffs2_get_ino_cache(c, ref->ino); 83627c72b04SDavid Woodhouse if (!xd || !ic || !ic->pino_nlink) { 8378a13695cSKaiGai Kohei dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) is orphan.\n", 838c9f700f8SKaiGai Kohei ref->ino, ref->xid, ref->xseqno); 8398a13695cSKaiGai Kohei ref->xseqno |= XREF_DELETE_MARKER; 840c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 841c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 8428a13695cSKaiGai Kohei xref_orphan_count++; 843aa98d7cfSKaiGai Kohei continue; 844aa98d7cfSKaiGai Kohei } 845aa98d7cfSKaiGai Kohei ref->xd = xd; 846aa98d7cfSKaiGai Kohei ref->ic = ic; 8472c887e23SKaiGai Kohei atomic_inc(&xd->refcnt); 8488f2b6f49SKaiGai Kohei ref->next = ic->xref; 8498f2b6f49SKaiGai Kohei ic->xref = ref; 850aa98d7cfSKaiGai Kohei } 851c9f700f8SKaiGai Kohei } 852aa98d7cfSKaiGai Kohei 8538a13695cSKaiGai Kohei /* Phase.3 : Link unchecked xdatum to xattr_unchecked list */ 854aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) { 855aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { 8568a13695cSKaiGai Kohei xdatum_count++; 857aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 8582c887e23SKaiGai Kohei if (!atomic_read(&xd->refcnt)) { 8598a13695cSKaiGai Kohei dbg_xattr("xdatum(xid=%u, version=%u) is orphan.\n", 860c9f700f8SKaiGai Kohei xd->xid, xd->version); 8618a13695cSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_DEAD; 862c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_unchecked); 8638a13695cSKaiGai Kohei xdatum_orphan_count++; 864aa98d7cfSKaiGai Kohei continue; 865aa98d7cfSKaiGai Kohei } 866c9f700f8SKaiGai Kohei if (is_xattr_datum_unchecked(c, xd)) { 867c9f700f8SKaiGai Kohei dbg_xattr("unchecked xdatum(xid=%u, version=%u)\n", 868c9f700f8SKaiGai Kohei xd->xid, xd->version); 869aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattr_unchecked); 870aa98d7cfSKaiGai Kohei xdatum_unchecked_count++; 871aa98d7cfSKaiGai Kohei } 872aa98d7cfSKaiGai Kohei } 873aa98d7cfSKaiGai Kohei } 874aa98d7cfSKaiGai Kohei /* build complete */ 8758a13695cSKaiGai Kohei JFFS2_NOTICE("complete building xattr subsystem, %u of xdatum" 8768a13695cSKaiGai Kohei " (%u unchecked, %u orphan) and " 8778a13695cSKaiGai Kohei "%u of xref (%u dead, %u orphan) found.\n", 8788a13695cSKaiGai Kohei xdatum_count, xdatum_unchecked_count, xdatum_orphan_count, 8798a13695cSKaiGai Kohei xref_count, xref_dead_count, xref_orphan_count); 880aa98d7cfSKaiGai Kohei } 881aa98d7cfSKaiGai Kohei 882aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, 883aa98d7cfSKaiGai Kohei uint32_t xid, uint32_t version) 884aa98d7cfSKaiGai Kohei { 885c9f700f8SKaiGai Kohei struct jffs2_xattr_datum *xd; 886aa98d7cfSKaiGai Kohei 887c9f700f8SKaiGai Kohei xd = jffs2_find_xattr_datum(c, xid); 888c9f700f8SKaiGai Kohei if (!xd) { 889aa98d7cfSKaiGai Kohei xd = jffs2_alloc_xattr_datum(); 890aa98d7cfSKaiGai Kohei if (!xd) 891aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 892aa98d7cfSKaiGai Kohei xd->xid = xid; 893aa98d7cfSKaiGai Kohei xd->version = version; 894aa98d7cfSKaiGai Kohei if (xd->xid > c->highest_xid) 895aa98d7cfSKaiGai Kohei c->highest_xid = xd->xid; 896aa98d7cfSKaiGai Kohei list_add_tail(&xd->xindex, &c->xattrindex[xid % XATTRINDEX_HASHSIZE]); 897aa98d7cfSKaiGai Kohei } 898aa98d7cfSKaiGai Kohei return xd; 899aa98d7cfSKaiGai Kohei } 900aa98d7cfSKaiGai Kohei 901aa98d7cfSKaiGai Kohei /* -------- xattr subsystem functions --------------- 902aa98d7cfSKaiGai Kohei * xprefix_to_handler(xprefix) 903aa98d7cfSKaiGai Kohei * is used to translate xprefix into xattr_handler. 904aa98d7cfSKaiGai Kohei * jffs2_listxattr(dentry, buffer, size) 905aa98d7cfSKaiGai Kohei * is an implementation of listxattr handler on jffs2. 906aa98d7cfSKaiGai Kohei * do_jffs2_getxattr(inode, xprefix, xname, buffer, size) 907aa98d7cfSKaiGai Kohei * is an implementation of getxattr handler on jffs2. 908aa98d7cfSKaiGai Kohei * do_jffs2_setxattr(inode, xprefix, xname, buffer, size, flags) 909aa98d7cfSKaiGai Kohei * is an implementation of setxattr handler on jffs2. 910aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 911365f0cb9SStephen Hemminger const struct xattr_handler *jffs2_xattr_handlers[] = { 912aa98d7cfSKaiGai Kohei &jffs2_user_xattr_handler, 913aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 914aa98d7cfSKaiGai Kohei &jffs2_security_xattr_handler, 915aa98d7cfSKaiGai Kohei #endif 916aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 917aa98d7cfSKaiGai Kohei &jffs2_acl_access_xattr_handler, 918aa98d7cfSKaiGai Kohei &jffs2_acl_default_xattr_handler, 919aa98d7cfSKaiGai Kohei #endif 920aa98d7cfSKaiGai Kohei &jffs2_trusted_xattr_handler, 921aa98d7cfSKaiGai Kohei NULL 922aa98d7cfSKaiGai Kohei }; 923aa98d7cfSKaiGai Kohei 924365f0cb9SStephen Hemminger static const struct xattr_handler *xprefix_to_handler(int xprefix) { 925365f0cb9SStephen Hemminger const struct xattr_handler *ret; 926aa98d7cfSKaiGai Kohei 927aa98d7cfSKaiGai Kohei switch (xprefix) { 928aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_USER: 929aa98d7cfSKaiGai Kohei ret = &jffs2_user_xattr_handler; 930aa98d7cfSKaiGai Kohei break; 931aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 932aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_SECURITY: 933aa98d7cfSKaiGai Kohei ret = &jffs2_security_xattr_handler; 934aa98d7cfSKaiGai Kohei break; 935aa98d7cfSKaiGai Kohei #endif 936aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 937aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_ACL_ACCESS: 938aa98d7cfSKaiGai Kohei ret = &jffs2_acl_access_xattr_handler; 939aa98d7cfSKaiGai Kohei break; 940aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_ACL_DEFAULT: 941aa98d7cfSKaiGai Kohei ret = &jffs2_acl_default_xattr_handler; 942aa98d7cfSKaiGai Kohei break; 943aa98d7cfSKaiGai Kohei #endif 944aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_TRUSTED: 945aa98d7cfSKaiGai Kohei ret = &jffs2_trusted_xattr_handler; 946aa98d7cfSKaiGai Kohei break; 947aa98d7cfSKaiGai Kohei default: 948aa98d7cfSKaiGai Kohei ret = NULL; 949aa98d7cfSKaiGai Kohei break; 950aa98d7cfSKaiGai Kohei } 951aa98d7cfSKaiGai Kohei return ret; 952aa98d7cfSKaiGai Kohei } 953aa98d7cfSKaiGai Kohei 954aa98d7cfSKaiGai Kohei ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size) 955aa98d7cfSKaiGai Kohei { 956aa98d7cfSKaiGai Kohei struct inode *inode = dentry->d_inode; 957aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 958aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 959aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 9608f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, **pref; 961aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 962365f0cb9SStephen Hemminger const struct xattr_handler *xhandle; 963aa98d7cfSKaiGai Kohei ssize_t len, rc; 964aa98d7cfSKaiGai Kohei int retry = 0; 965aa98d7cfSKaiGai Kohei 9668f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 967aa98d7cfSKaiGai Kohei if (unlikely(rc)) 968aa98d7cfSKaiGai Kohei return rc; 969aa98d7cfSKaiGai Kohei 970aa98d7cfSKaiGai Kohei down_read(&c->xattr_sem); 971aa98d7cfSKaiGai Kohei retry: 972aa98d7cfSKaiGai Kohei len = 0; 9738f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 974aa98d7cfSKaiGai Kohei BUG_ON(ref->ic != ic); 975aa98d7cfSKaiGai Kohei xd = ref->xd; 976aa98d7cfSKaiGai Kohei if (!xd->xname) { 977aa98d7cfSKaiGai Kohei /* xdatum is unchached */ 978aa98d7cfSKaiGai Kohei if (!retry) { 979aa98d7cfSKaiGai Kohei retry = 1; 980aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 981aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 982aa98d7cfSKaiGai Kohei goto retry; 983aa98d7cfSKaiGai Kohei } else { 984aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 985aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 9868f2b6f49SKaiGai Kohei *pref = ref->next; 9878a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 988aa98d7cfSKaiGai Kohei goto retry; 989aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 990aa98d7cfSKaiGai Kohei goto out; 991aa98d7cfSKaiGai Kohei } 992aa98d7cfSKaiGai Kohei } 993aa98d7cfSKaiGai Kohei xhandle = xprefix_to_handler(xd->xprefix); 994aa98d7cfSKaiGai Kohei if (!xhandle) 995aa98d7cfSKaiGai Kohei continue; 996aa98d7cfSKaiGai Kohei if (buffer) { 997431547b3SChristoph Hellwig rc = xhandle->list(dentry, buffer+len, size-len, 998431547b3SChristoph Hellwig xd->xname, xd->name_len, xd->flags); 999aa98d7cfSKaiGai Kohei } else { 1000431547b3SChristoph Hellwig rc = xhandle->list(dentry, NULL, 0, xd->xname, 1001431547b3SChristoph Hellwig xd->name_len, xd->flags); 1002aa98d7cfSKaiGai Kohei } 1003aa98d7cfSKaiGai Kohei if (rc < 0) 1004aa98d7cfSKaiGai Kohei goto out; 1005aa98d7cfSKaiGai Kohei len += rc; 1006aa98d7cfSKaiGai Kohei } 1007aa98d7cfSKaiGai Kohei rc = len; 1008aa98d7cfSKaiGai Kohei out: 1009aa98d7cfSKaiGai Kohei if (!retry) { 1010aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1011aa98d7cfSKaiGai Kohei } else { 1012aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1013aa98d7cfSKaiGai Kohei } 1014aa98d7cfSKaiGai Kohei return rc; 1015aa98d7cfSKaiGai Kohei } 1016aa98d7cfSKaiGai Kohei 1017aa98d7cfSKaiGai Kohei int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, 1018aa98d7cfSKaiGai Kohei char *buffer, size_t size) 1019aa98d7cfSKaiGai Kohei { 1020aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 1021aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 1022aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 1023aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 10248f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, **pref; 1025aa98d7cfSKaiGai Kohei int rc, retry = 0; 1026aa98d7cfSKaiGai Kohei 10278f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 1028aa98d7cfSKaiGai Kohei if (unlikely(rc)) 1029aa98d7cfSKaiGai Kohei return rc; 1030aa98d7cfSKaiGai Kohei 1031aa98d7cfSKaiGai Kohei down_read(&c->xattr_sem); 1032aa98d7cfSKaiGai Kohei retry: 10338f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 1034aa98d7cfSKaiGai Kohei BUG_ON(ref->ic!=ic); 1035aa98d7cfSKaiGai Kohei 1036aa98d7cfSKaiGai Kohei xd = ref->xd; 1037aa98d7cfSKaiGai Kohei if (xd->xprefix != xprefix) 1038aa98d7cfSKaiGai Kohei continue; 1039aa98d7cfSKaiGai Kohei if (!xd->xname) { 1040aa98d7cfSKaiGai Kohei /* xdatum is unchached */ 1041aa98d7cfSKaiGai Kohei if (!retry) { 1042aa98d7cfSKaiGai Kohei retry = 1; 1043aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1044aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1045aa98d7cfSKaiGai Kohei goto retry; 1046aa98d7cfSKaiGai Kohei } else { 1047aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1048aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 10498f2b6f49SKaiGai Kohei *pref = ref->next; 10508a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 1051aa98d7cfSKaiGai Kohei goto retry; 1052aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) { 1053aa98d7cfSKaiGai Kohei goto out; 1054aa98d7cfSKaiGai Kohei } 1055aa98d7cfSKaiGai Kohei } 1056aa98d7cfSKaiGai Kohei } 1057aa98d7cfSKaiGai Kohei if (!strcmp(xname, xd->xname)) { 1058aa98d7cfSKaiGai Kohei rc = xd->value_len; 1059aa98d7cfSKaiGai Kohei if (buffer) { 1060aa98d7cfSKaiGai Kohei if (size < rc) { 1061aa98d7cfSKaiGai Kohei rc = -ERANGE; 1062aa98d7cfSKaiGai Kohei } else { 1063aa98d7cfSKaiGai Kohei memcpy(buffer, xd->xvalue, rc); 1064aa98d7cfSKaiGai Kohei } 1065aa98d7cfSKaiGai Kohei } 1066aa98d7cfSKaiGai Kohei goto out; 1067aa98d7cfSKaiGai Kohei } 1068aa98d7cfSKaiGai Kohei } 1069aa98d7cfSKaiGai Kohei rc = -ENODATA; 1070aa98d7cfSKaiGai Kohei out: 1071aa98d7cfSKaiGai Kohei if (!retry) { 1072aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1073aa98d7cfSKaiGai Kohei } else { 1074aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1075aa98d7cfSKaiGai Kohei } 1076aa98d7cfSKaiGai Kohei return rc; 1077aa98d7cfSKaiGai Kohei } 1078aa98d7cfSKaiGai Kohei 1079aa98d7cfSKaiGai Kohei int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, 1080aa98d7cfSKaiGai Kohei const char *buffer, size_t size, int flags) 1081aa98d7cfSKaiGai Kohei { 1082aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 1083aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 1084aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 1085aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 10868f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, *newref, **pref; 10879fe4854cSDavid Woodhouse uint32_t length, request; 1088aa98d7cfSKaiGai Kohei int rc; 1089aa98d7cfSKaiGai Kohei 10908f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 1091aa98d7cfSKaiGai Kohei if (unlikely(rc)) 1092aa98d7cfSKaiGai Kohei return rc; 1093aa98d7cfSKaiGai Kohei 1094aa98d7cfSKaiGai Kohei request = PAD(sizeof(struct jffs2_raw_xattr) + strlen(xname) + 1 + size); 10959fe4854cSDavid Woodhouse rc = jffs2_reserve_space(c, request, &length, 1096aa98d7cfSKaiGai Kohei ALLOC_NORMAL, JFFS2_SUMMARY_XATTR_SIZE); 1097aa98d7cfSKaiGai Kohei if (rc) { 1098aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); 1099aa98d7cfSKaiGai Kohei return rc; 1100aa98d7cfSKaiGai Kohei } 1101aa98d7cfSKaiGai Kohei 1102aa98d7cfSKaiGai Kohei /* Find existing xattr */ 1103aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1104aa98d7cfSKaiGai Kohei retry: 11058f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 1106aa98d7cfSKaiGai Kohei xd = ref->xd; 1107aa98d7cfSKaiGai Kohei if (xd->xprefix != xprefix) 1108aa98d7cfSKaiGai Kohei continue; 1109aa98d7cfSKaiGai Kohei if (!xd->xname) { 1110aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1111aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 11128f2b6f49SKaiGai Kohei *pref = ref->next; 11138a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 1114aa98d7cfSKaiGai Kohei goto retry; 1115aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 1116aa98d7cfSKaiGai Kohei goto out; 1117aa98d7cfSKaiGai Kohei } 1118aa98d7cfSKaiGai Kohei if (!strcmp(xd->xname, xname)) { 1119aa98d7cfSKaiGai Kohei if (flags & XATTR_CREATE) { 1120aa98d7cfSKaiGai Kohei rc = -EEXIST; 1121aa98d7cfSKaiGai Kohei goto out; 1122aa98d7cfSKaiGai Kohei } 1123aa98d7cfSKaiGai Kohei if (!buffer) { 11248a13695cSKaiGai Kohei ref->ino = ic->ino; 11258a13695cSKaiGai Kohei ref->xid = xd->xid; 11268a13695cSKaiGai Kohei ref->xseqno |= XREF_DELETE_MARKER; 11278a13695cSKaiGai Kohei rc = save_xattr_ref(c, ref); 11288a13695cSKaiGai Kohei if (!rc) { 11298f2b6f49SKaiGai Kohei *pref = ref->next; 11308a13695cSKaiGai Kohei spin_lock(&c->erase_completion_lock); 11318a13695cSKaiGai Kohei ref->next = c->xref_dead_list; 11328a13695cSKaiGai Kohei c->xref_dead_list = ref; 11338a13695cSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 1134c6e8c6ccSKaiGai Kohei unrefer_xattr_datum(c, xd); 11358a13695cSKaiGai Kohei } else { 11368a13695cSKaiGai Kohei ref->ic = ic; 11378a13695cSKaiGai Kohei ref->xd = xd; 11388a13695cSKaiGai Kohei ref->xseqno &= ~XREF_DELETE_MARKER; 11398a13695cSKaiGai Kohei } 1140aa98d7cfSKaiGai Kohei goto out; 1141aa98d7cfSKaiGai Kohei } 1142aa98d7cfSKaiGai Kohei goto found; 1143aa98d7cfSKaiGai Kohei } 1144aa98d7cfSKaiGai Kohei } 1145aa98d7cfSKaiGai Kohei /* not found */ 1146aa98d7cfSKaiGai Kohei if (flags & XATTR_REPLACE) { 1147aa98d7cfSKaiGai Kohei rc = -ENODATA; 1148aa98d7cfSKaiGai Kohei goto out; 1149aa98d7cfSKaiGai Kohei } 1150aa98d7cfSKaiGai Kohei if (!buffer) { 1151c9f700f8SKaiGai Kohei rc = -ENODATA; 1152aa98d7cfSKaiGai Kohei goto out; 1153aa98d7cfSKaiGai Kohei } 1154aa98d7cfSKaiGai Kohei found: 11559fe4854cSDavid Woodhouse xd = create_xattr_datum(c, xprefix, xname, buffer, size); 1156aa98d7cfSKaiGai Kohei if (IS_ERR(xd)) { 1157aa98d7cfSKaiGai Kohei rc = PTR_ERR(xd); 1158aa98d7cfSKaiGai Kohei goto out; 1159aa98d7cfSKaiGai Kohei } 1160aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1161aa98d7cfSKaiGai Kohei jffs2_complete_reservation(c); 1162aa98d7cfSKaiGai Kohei 1163aa98d7cfSKaiGai Kohei /* create xattr_ref */ 1164aa98d7cfSKaiGai Kohei request = PAD(sizeof(struct jffs2_raw_xref)); 11659fe4854cSDavid Woodhouse rc = jffs2_reserve_space(c, request, &length, 1166aa98d7cfSKaiGai Kohei ALLOC_NORMAL, JFFS2_SUMMARY_XREF_SIZE); 1167c9f700f8SKaiGai Kohei down_write(&c->xattr_sem); 1168aa98d7cfSKaiGai Kohei if (rc) { 1169aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); 1170c6e8c6ccSKaiGai Kohei unrefer_xattr_datum(c, xd); 1171aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1172aa98d7cfSKaiGai Kohei return rc; 1173aa98d7cfSKaiGai Kohei } 11748f2b6f49SKaiGai Kohei if (ref) 11758f2b6f49SKaiGai Kohei *pref = ref->next; 11769fe4854cSDavid Woodhouse newref = create_xattr_ref(c, ic, xd); 1177aa98d7cfSKaiGai Kohei if (IS_ERR(newref)) { 11788f2b6f49SKaiGai Kohei if (ref) { 11798f2b6f49SKaiGai Kohei ref->next = ic->xref; 11808f2b6f49SKaiGai Kohei ic->xref = ref; 11818f2b6f49SKaiGai Kohei } 1182aa98d7cfSKaiGai Kohei rc = PTR_ERR(newref); 1183c6e8c6ccSKaiGai Kohei unrefer_xattr_datum(c, xd); 1184aa98d7cfSKaiGai Kohei } else if (ref) { 11858a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 1186aa98d7cfSKaiGai Kohei } 1187aa98d7cfSKaiGai Kohei out: 1188aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1189aa98d7cfSKaiGai Kohei jffs2_complete_reservation(c); 1190aa98d7cfSKaiGai Kohei return rc; 1191aa98d7cfSKaiGai Kohei } 1192aa98d7cfSKaiGai Kohei 1193aa98d7cfSKaiGai Kohei /* -------- garbage collector functions ------------- 1194c9f700f8SKaiGai Kohei * jffs2_garbage_collect_xattr_datum(c, xd, raw) 1195aa98d7cfSKaiGai Kohei * is used to move xdatum into new node. 1196c9f700f8SKaiGai Kohei * jffs2_garbage_collect_xattr_ref(c, ref, raw) 1197aa98d7cfSKaiGai Kohei * is used to move xref into new node. 1198aa98d7cfSKaiGai Kohei * jffs2_verify_xattr(c) 1199aa98d7cfSKaiGai Kohei * is used to call do_verify_xattr_datum() before garbage collecting. 12008a13695cSKaiGai Kohei * jffs2_release_xattr_datum(c, xd) 12018a13695cSKaiGai Kohei * is used to release an in-memory object of xdatum. 12028a13695cSKaiGai Kohei * jffs2_release_xattr_ref(c, ref) 12038a13695cSKaiGai Kohei * is used to release an in-memory object of xref. 1204aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 1205c9f700f8SKaiGai Kohei int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, 1206c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw) 1207aa98d7cfSKaiGai Kohei { 12089fe4854cSDavid Woodhouse uint32_t totlen, length, old_ofs; 1209c9f700f8SKaiGai Kohei int rc = 0; 1210aa98d7cfSKaiGai Kohei 1211084702e0SKaiGai Kohei down_write(&c->xattr_sem); 1212c9f700f8SKaiGai Kohei if (xd->node != raw) 1213c9f700f8SKaiGai Kohei goto out; 12148a13695cSKaiGai Kohei if (xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID)) 1215c9f700f8SKaiGai Kohei goto out; 1216aa98d7cfSKaiGai Kohei 1217aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 12188a13695cSKaiGai Kohei if (unlikely(rc)) { 12198a13695cSKaiGai Kohei rc = (rc > 0) ? 0 : rc; 1220084702e0SKaiGai Kohei goto out; 1221aa98d7cfSKaiGai Kohei } 12228a13695cSKaiGai Kohei old_ofs = ref_offset(xd->node); 12238a13695cSKaiGai Kohei totlen = PAD(sizeof(struct jffs2_raw_xattr) 12248a13695cSKaiGai Kohei + xd->name_len + 1 + xd->value_len); 12259fe4854cSDavid Woodhouse rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XATTR_SIZE); 1226c9f700f8SKaiGai Kohei if (rc) { 1227c9f700f8SKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space_gc()=%d, request=%u\n", rc, totlen); 1228084702e0SKaiGai Kohei goto out; 1229aa98d7cfSKaiGai Kohei } 12309fe4854cSDavid Woodhouse rc = save_xattr_datum(c, xd); 1231aa98d7cfSKaiGai Kohei if (!rc) 1232aa98d7cfSKaiGai Kohei dbg_xattr("xdatum (xid=%u, version=%u) GC'ed from %#08x to %08x\n", 1233aa98d7cfSKaiGai Kohei xd->xid, xd->version, old_ofs, ref_offset(xd->node)); 1234084702e0SKaiGai Kohei out: 1235c9f700f8SKaiGai Kohei if (!rc) 1236c9f700f8SKaiGai Kohei jffs2_mark_node_obsolete(c, raw); 1237084702e0SKaiGai Kohei up_write(&c->xattr_sem); 1238aa98d7cfSKaiGai Kohei return rc; 1239aa98d7cfSKaiGai Kohei } 1240aa98d7cfSKaiGai Kohei 1241c9f700f8SKaiGai Kohei int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, 1242c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw) 1243aa98d7cfSKaiGai Kohei { 12449fe4854cSDavid Woodhouse uint32_t totlen, length, old_ofs; 1245c9f700f8SKaiGai Kohei int rc = 0; 1246aa98d7cfSKaiGai Kohei 1247084702e0SKaiGai Kohei down_write(&c->xattr_sem); 1248aa98d7cfSKaiGai Kohei BUG_ON(!ref->node); 1249aa98d7cfSKaiGai Kohei 1250c9f700f8SKaiGai Kohei if (ref->node != raw) 1251c9f700f8SKaiGai Kohei goto out; 1252c9f700f8SKaiGai Kohei if (is_xattr_ref_dead(ref) && (raw->next_in_ino == (void *)ref)) 1253084702e0SKaiGai Kohei goto out; 1254084702e0SKaiGai Kohei 1255c9f700f8SKaiGai Kohei old_ofs = ref_offset(ref->node); 1256c9f700f8SKaiGai Kohei totlen = ref_totlen(c, c->gcblock, ref->node); 1257c9f700f8SKaiGai Kohei 12589fe4854cSDavid Woodhouse rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XREF_SIZE); 1259c9f700f8SKaiGai Kohei if (rc) { 1260c9f700f8SKaiGai Kohei JFFS2_WARNING("%s: jffs2_reserve_space_gc() = %d, request = %u\n", 12618e24eea7SHarvey Harrison __func__, rc, totlen); 1262084702e0SKaiGai Kohei rc = rc ? rc : -EBADFD; 1263084702e0SKaiGai Kohei goto out; 1264aa98d7cfSKaiGai Kohei } 12659fe4854cSDavid Woodhouse rc = save_xattr_ref(c, ref); 1266aa98d7cfSKaiGai Kohei if (!rc) 1267aa98d7cfSKaiGai Kohei dbg_xattr("xref (ino=%u, xid=%u) GC'ed from %#08x to %08x\n", 1268aa98d7cfSKaiGai Kohei ref->ic->ino, ref->xd->xid, old_ofs, ref_offset(ref->node)); 1269084702e0SKaiGai Kohei out: 1270c9f700f8SKaiGai Kohei if (!rc) 1271c9f700f8SKaiGai Kohei jffs2_mark_node_obsolete(c, raw); 1272084702e0SKaiGai Kohei up_write(&c->xattr_sem); 1273aa98d7cfSKaiGai Kohei return rc; 1274aa98d7cfSKaiGai Kohei } 1275aa98d7cfSKaiGai Kohei 1276aa98d7cfSKaiGai Kohei int jffs2_verify_xattr(struct jffs2_sb_info *c) 1277aa98d7cfSKaiGai Kohei { 1278aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 1279c9f700f8SKaiGai Kohei struct jffs2_eraseblock *jeb; 1280c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 1281c9f700f8SKaiGai Kohei uint32_t totlen; 1282aa98d7cfSKaiGai Kohei int rc; 1283aa98d7cfSKaiGai Kohei 1284aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1285aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) { 1286aa98d7cfSKaiGai Kohei rc = do_verify_xattr_datum(c, xd); 1287c9f700f8SKaiGai Kohei if (rc < 0) 1288c9f700f8SKaiGai Kohei continue; 1289aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 1290c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 1291c9f700f8SKaiGai Kohei for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { 1292c9f700f8SKaiGai Kohei if (ref_flags(raw) != REF_UNCHECKED) 1293c9f700f8SKaiGai Kohei continue; 1294c9f700f8SKaiGai Kohei jeb = &c->blocks[ref_offset(raw) / c->sector_size]; 1295c9f700f8SKaiGai Kohei totlen = PAD(ref_totlen(c, jeb, raw)); 1296c9f700f8SKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 1297c9f700f8SKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 1298c9f700f8SKaiGai Kohei raw->flash_offset = ref_offset(raw) 1299c9f700f8SKaiGai Kohei | ((xd->node == (void *)raw) ? REF_PRISTINE : REF_NORMAL); 1300aa98d7cfSKaiGai Kohei } 13018a13695cSKaiGai Kohei if (xd->flags & JFFS2_XFLAGS_DEAD) 1302c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_dead_list); 1303c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 1304aa98d7cfSKaiGai Kohei } 1305aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1306aa98d7cfSKaiGai Kohei return list_empty(&c->xattr_unchecked) ? 1 : 0; 1307aa98d7cfSKaiGai Kohei } 1308c9f700f8SKaiGai Kohei 1309c9f700f8SKaiGai Kohei void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 1310c9f700f8SKaiGai Kohei { 1311c9f700f8SKaiGai Kohei /* must be called under spin_lock(&c->erase_completion_lock) */ 13122c887e23SKaiGai Kohei if (atomic_read(&xd->refcnt) || xd->node != (void *)xd) 1313c9f700f8SKaiGai Kohei return; 1314c9f700f8SKaiGai Kohei 1315c9f700f8SKaiGai Kohei list_del(&xd->xindex); 1316c9f700f8SKaiGai Kohei jffs2_free_xattr_datum(xd); 1317c9f700f8SKaiGai Kohei } 1318c9f700f8SKaiGai Kohei 1319c9f700f8SKaiGai Kohei void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 1320c9f700f8SKaiGai Kohei { 1321c9f700f8SKaiGai Kohei /* must be called under spin_lock(&c->erase_completion_lock) */ 1322c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *tmp, **ptmp; 1323c9f700f8SKaiGai Kohei 1324c9f700f8SKaiGai Kohei if (ref->node != (void *)ref) 1325c9f700f8SKaiGai Kohei return; 1326c9f700f8SKaiGai Kohei 1327c9f700f8SKaiGai Kohei for (tmp=c->xref_dead_list, ptmp=&c->xref_dead_list; tmp; ptmp=&tmp->next, tmp=tmp->next) { 1328c9f700f8SKaiGai Kohei if (ref == tmp) { 1329c9f700f8SKaiGai Kohei *ptmp = tmp->next; 1330c9f700f8SKaiGai Kohei break; 1331c9f700f8SKaiGai Kohei } 1332c9f700f8SKaiGai Kohei } 13338a13695cSKaiGai Kohei jffs2_free_xattr_ref(ref); 1334c9f700f8SKaiGai Kohei } 1335