1652ecc20SKaiGai Kohei /* 2652ecc20SKaiGai Kohei * JFFS2 -- Journalling Flash File System, Version 2. 3aa98d7cfSKaiGai Kohei * 4aa98d7cfSKaiGai Kohei * Copyright (C) 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 */ 11aa98d7cfSKaiGai Kohei #include <linux/kernel.h> 12aa98d7cfSKaiGai Kohei #include <linux/slab.h> 13aa98d7cfSKaiGai Kohei #include <linux/fs.h> 14aa98d7cfSKaiGai Kohei #include <linux/time.h> 15aa98d7cfSKaiGai Kohei #include <linux/pagemap.h> 16aa98d7cfSKaiGai Kohei #include <linux/highmem.h> 17aa98d7cfSKaiGai Kohei #include <linux/crc32.h> 18aa98d7cfSKaiGai Kohei #include <linux/jffs2.h> 19aa98d7cfSKaiGai Kohei #include <linux/xattr.h> 20aa98d7cfSKaiGai Kohei #include <linux/mtd/mtd.h> 21aa98d7cfSKaiGai Kohei #include "nodelist.h" 22aa98d7cfSKaiGai Kohei /* -------- xdatum related functions ---------------- 23aa98d7cfSKaiGai Kohei * xattr_datum_hashkey(xprefix, xname, xvalue, xsize) 24aa98d7cfSKaiGai Kohei * is used to calcurate xdatum hashkey. The reminder of hashkey into XATTRINDEX_HASHSIZE is 25aa98d7cfSKaiGai Kohei * the index of the xattr name/value pair cache (c->xattrindex). 26aa98d7cfSKaiGai Kohei * unload_xattr_datum(c, xd) 27aa98d7cfSKaiGai Kohei * is used to release xattr name/value pair and detach from c->xattrindex. 28aa98d7cfSKaiGai Kohei * reclaim_xattr_datum(c) 29aa98d7cfSKaiGai Kohei * is used to reclaim xattr name/value pairs on the xattr name/value pair cache when 30aa98d7cfSKaiGai Kohei * memory usage by cache is over c->xdatum_mem_threshold. Currentry, this threshold 31aa98d7cfSKaiGai Kohei * is hard coded as 32KiB. 32aa98d7cfSKaiGai Kohei * delete_xattr_datum_node(c, xd) 33aa98d7cfSKaiGai Kohei * is used to delete a jffs2 node is dominated by xdatum. When EBS(Erase Block Summary) is 34aa98d7cfSKaiGai Kohei * enabled, it overwrites the obsolete node by myself. 35aa98d7cfSKaiGai Kohei * delete_xattr_datum(c, xd) 36aa98d7cfSKaiGai Kohei * is used to delete jffs2_xattr_datum object. It must be called with 0-value of reference 37aa98d7cfSKaiGai Kohei * counter. (It means how many jffs2_xattr_ref object refers this xdatum.) 38aa98d7cfSKaiGai Kohei * do_verify_xattr_datum(c, xd) 39aa98d7cfSKaiGai Kohei * is used to load the xdatum informations without name/value pair from the medium. 40aa98d7cfSKaiGai Kohei * It's necessary once, because those informations are not collected during mounting 41aa98d7cfSKaiGai Kohei * process when EBS is enabled. 42aa98d7cfSKaiGai Kohei * 0 will be returned, if success. An negative return value means recoverable error, and 43aa98d7cfSKaiGai Kohei * positive return value means unrecoverable error. Thus, caller must remove this xdatum 44aa98d7cfSKaiGai Kohei * and xref when it returned positive value. 45aa98d7cfSKaiGai Kohei * do_load_xattr_datum(c, xd) 46aa98d7cfSKaiGai Kohei * is used to load name/value pair from the medium. 47aa98d7cfSKaiGai Kohei * The meanings of return value is same as do_verify_xattr_datum(). 48aa98d7cfSKaiGai Kohei * load_xattr_datum(c, xd) 49aa98d7cfSKaiGai Kohei * is used to be as a wrapper of do_verify_xattr_datum() and do_load_xattr_datum(). 50aa98d7cfSKaiGai Kohei * If xd need to call do_verify_xattr_datum() at first, it's called before calling 51aa98d7cfSKaiGai Kohei * do_load_xattr_datum(). The meanings of return value is same as do_verify_xattr_datum(). 52aa98d7cfSKaiGai Kohei * save_xattr_datum(c, xd, phys_ofs) 53aa98d7cfSKaiGai Kohei * is used to write xdatum to medium. xd->version will be incremented. 54aa98d7cfSKaiGai Kohei * create_xattr_datum(c, xprefix, xname, xvalue, xsize, phys_ofs) 55aa98d7cfSKaiGai Kohei * is used to create new xdatum and write to medium. 56aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 57aa98d7cfSKaiGai Kohei 58aa98d7cfSKaiGai Kohei static uint32_t xattr_datum_hashkey(int xprefix, const char *xname, const char *xvalue, int xsize) 59aa98d7cfSKaiGai Kohei { 60aa98d7cfSKaiGai Kohei int name_len = strlen(xname); 61aa98d7cfSKaiGai Kohei 62aa98d7cfSKaiGai Kohei return crc32(xprefix, xname, name_len) ^ crc32(xprefix, xvalue, xsize); 63aa98d7cfSKaiGai Kohei } 64aa98d7cfSKaiGai Kohei 65aa98d7cfSKaiGai Kohei static void unload_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 66aa98d7cfSKaiGai Kohei { 67aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 68aa98d7cfSKaiGai Kohei D1(dbg_xattr("%s: xid=%u, version=%u\n", __FUNCTION__, xd->xid, xd->version)); 69aa98d7cfSKaiGai Kohei if (xd->xname) { 70aa98d7cfSKaiGai Kohei c->xdatum_mem_usage -= (xd->name_len + 1 + xd->value_len); 71aa98d7cfSKaiGai Kohei kfree(xd->xname); 72aa98d7cfSKaiGai Kohei } 73aa98d7cfSKaiGai Kohei 74aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 75aa98d7cfSKaiGai Kohei xd->hashkey = 0; 76aa98d7cfSKaiGai Kohei xd->xname = NULL; 77aa98d7cfSKaiGai Kohei xd->xvalue = NULL; 78aa98d7cfSKaiGai Kohei } 79aa98d7cfSKaiGai Kohei 80aa98d7cfSKaiGai Kohei static void reclaim_xattr_datum(struct jffs2_sb_info *c) 81aa98d7cfSKaiGai Kohei { 82aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 83aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 84aa98d7cfSKaiGai Kohei uint32_t target, before; 85aa98d7cfSKaiGai Kohei static int index = 0; 86aa98d7cfSKaiGai Kohei int count; 87aa98d7cfSKaiGai Kohei 88aa98d7cfSKaiGai Kohei if (c->xdatum_mem_threshold > c->xdatum_mem_usage) 89aa98d7cfSKaiGai Kohei return; 90aa98d7cfSKaiGai Kohei 91aa98d7cfSKaiGai Kohei before = c->xdatum_mem_usage; 92aa98d7cfSKaiGai Kohei target = c->xdatum_mem_usage * 4 / 5; /* 20% reduction */ 93aa98d7cfSKaiGai Kohei for (count = 0; count < XATTRINDEX_HASHSIZE; count++) { 94aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[index], xindex) { 95aa98d7cfSKaiGai Kohei if (xd->flags & JFFS2_XFLAGS_HOT) { 96aa98d7cfSKaiGai Kohei xd->flags &= ~JFFS2_XFLAGS_HOT; 97aa98d7cfSKaiGai Kohei } else if (!(xd->flags & JFFS2_XFLAGS_BIND)) { 98aa98d7cfSKaiGai Kohei unload_xattr_datum(c, xd); 99aa98d7cfSKaiGai Kohei } 100aa98d7cfSKaiGai Kohei if (c->xdatum_mem_usage <= target) 101aa98d7cfSKaiGai Kohei goto out; 102aa98d7cfSKaiGai Kohei } 103aa98d7cfSKaiGai Kohei index = (index+1) % XATTRINDEX_HASHSIZE; 104aa98d7cfSKaiGai Kohei } 105aa98d7cfSKaiGai Kohei out: 106aa98d7cfSKaiGai Kohei JFFS2_NOTICE("xdatum_mem_usage from %u byte to %u byte (%u byte reclaimed)\n", 107aa98d7cfSKaiGai Kohei before, c->xdatum_mem_usage, before - c->xdatum_mem_usage); 108aa98d7cfSKaiGai Kohei } 109aa98d7cfSKaiGai Kohei 110aa98d7cfSKaiGai Kohei static void delete_xattr_datum_node(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 111aa98d7cfSKaiGai Kohei { 112aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 113aa98d7cfSKaiGai Kohei struct jffs2_raw_xattr rx; 114aa98d7cfSKaiGai Kohei uint32_t length; 115aa98d7cfSKaiGai Kohei int rc; 116aa98d7cfSKaiGai Kohei 117aa98d7cfSKaiGai Kohei if (!xd->node) { 118aa98d7cfSKaiGai Kohei JFFS2_WARNING("xdatum (xid=%u) is removed twice.\n", xd->xid); 119aa98d7cfSKaiGai Kohei return; 120aa98d7cfSKaiGai Kohei } 121aa98d7cfSKaiGai Kohei if (jffs2_sum_active()) { 122aa98d7cfSKaiGai Kohei memset(&rx, 0xff, sizeof(struct jffs2_raw_xattr)); 123aa98d7cfSKaiGai Kohei rc = jffs2_flash_read(c, ref_offset(xd->node), 124aa98d7cfSKaiGai Kohei sizeof(struct jffs2_unknown_node), 125aa98d7cfSKaiGai Kohei &length, (char *)&rx); 126aa98d7cfSKaiGai Kohei if (rc || length != sizeof(struct jffs2_unknown_node)) { 127aa98d7cfSKaiGai Kohei JFFS2_ERROR("jffs2_flash_read()=%d, req=%u, read=%u at %#08x\n", 128aa98d7cfSKaiGai Kohei rc, sizeof(struct jffs2_unknown_node), 129aa98d7cfSKaiGai Kohei length, ref_offset(xd->node)); 130aa98d7cfSKaiGai Kohei } 131aa98d7cfSKaiGai Kohei rc = jffs2_flash_write(c, ref_offset(xd->node), sizeof(rx), 132aa98d7cfSKaiGai Kohei &length, (char *)&rx); 133aa98d7cfSKaiGai Kohei if (rc || length != sizeof(struct jffs2_raw_xattr)) { 134aa98d7cfSKaiGai Kohei JFFS2_ERROR("jffs2_flash_write()=%d, req=%u, wrote=%u ar %#08x\n", 135aa98d7cfSKaiGai Kohei rc, sizeof(rx), length, ref_offset(xd->node)); 136aa98d7cfSKaiGai Kohei } 137aa98d7cfSKaiGai Kohei } 138aa98d7cfSKaiGai Kohei spin_lock(&c->erase_completion_lock); 139aa98d7cfSKaiGai Kohei xd->node->next_in_ino = NULL; 140aa98d7cfSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 141aa98d7cfSKaiGai Kohei jffs2_mark_node_obsolete(c, xd->node); 142aa98d7cfSKaiGai Kohei xd->node = NULL; 143aa98d7cfSKaiGai Kohei } 144aa98d7cfSKaiGai Kohei 145aa98d7cfSKaiGai Kohei static void delete_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 146aa98d7cfSKaiGai Kohei { 147aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 148aa98d7cfSKaiGai Kohei BUG_ON(xd->refcnt); 149aa98d7cfSKaiGai Kohei 150aa98d7cfSKaiGai Kohei unload_xattr_datum(c, xd); 151aa98d7cfSKaiGai Kohei if (xd->node) { 152aa98d7cfSKaiGai Kohei delete_xattr_datum_node(c, xd); 153aa98d7cfSKaiGai Kohei xd->node = NULL; 154aa98d7cfSKaiGai Kohei } 155aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 156aa98d7cfSKaiGai Kohei } 157aa98d7cfSKaiGai Kohei 158aa98d7cfSKaiGai Kohei static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 159aa98d7cfSKaiGai Kohei { 160aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 161aa98d7cfSKaiGai Kohei struct jffs2_eraseblock *jeb; 162aa98d7cfSKaiGai Kohei struct jffs2_raw_xattr rx; 163aa98d7cfSKaiGai Kohei size_t readlen; 164aa98d7cfSKaiGai Kohei uint32_t crc, totlen; 165aa98d7cfSKaiGai Kohei int rc; 166aa98d7cfSKaiGai Kohei 167aa98d7cfSKaiGai Kohei BUG_ON(!xd->node); 168aa98d7cfSKaiGai Kohei BUG_ON(ref_flags(xd->node) != REF_UNCHECKED); 169aa98d7cfSKaiGai Kohei 170aa98d7cfSKaiGai Kohei rc = jffs2_flash_read(c, ref_offset(xd->node), sizeof(rx), &readlen, (char *)&rx); 171aa98d7cfSKaiGai Kohei if (rc || readlen != sizeof(rx)) { 172aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_flash_read()=%d, req=%u, read=%u at %#08x\n", 173aa98d7cfSKaiGai Kohei rc, sizeof(rx), readlen, ref_offset(xd->node)); 174aa98d7cfSKaiGai Kohei return rc ? rc : -EIO; 175aa98d7cfSKaiGai Kohei } 176aa98d7cfSKaiGai Kohei crc = crc32(0, &rx, sizeof(rx) - 4); 177aa98d7cfSKaiGai Kohei if (crc != je32_to_cpu(rx.node_crc)) { 178aa98d7cfSKaiGai Kohei if (je32_to_cpu(rx.node_crc) != 0xffffffff) 179aa98d7cfSKaiGai Kohei JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", 180aa98d7cfSKaiGai Kohei ref_offset(xd->node), je32_to_cpu(rx.hdr_crc), crc); 181aa98d7cfSKaiGai Kohei return EIO; 182aa98d7cfSKaiGai Kohei } 183aa98d7cfSKaiGai Kohei totlen = PAD(sizeof(rx) + rx.name_len + 1 + je16_to_cpu(rx.value_len)); 184aa98d7cfSKaiGai Kohei if (je16_to_cpu(rx.magic) != JFFS2_MAGIC_BITMASK 185aa98d7cfSKaiGai Kohei || je16_to_cpu(rx.nodetype) != JFFS2_NODETYPE_XATTR 186aa98d7cfSKaiGai Kohei || je32_to_cpu(rx.totlen) != totlen 187aa98d7cfSKaiGai Kohei || je32_to_cpu(rx.xid) != xd->xid 188aa98d7cfSKaiGai Kohei || je32_to_cpu(rx.version) != xd->version) { 189aa98d7cfSKaiGai Kohei JFFS2_ERROR("inconsistent xdatum at %#08x, magic=%#04x/%#04x, " 190aa98d7cfSKaiGai Kohei "nodetype=%#04x/%#04x, totlen=%u/%u, xid=%u/%u, version=%u/%u\n", 191aa98d7cfSKaiGai Kohei ref_offset(xd->node), je16_to_cpu(rx.magic), JFFS2_MAGIC_BITMASK, 192aa98d7cfSKaiGai Kohei je16_to_cpu(rx.nodetype), JFFS2_NODETYPE_XATTR, 193aa98d7cfSKaiGai Kohei je32_to_cpu(rx.totlen), totlen, 194aa98d7cfSKaiGai Kohei je32_to_cpu(rx.xid), xd->xid, 195aa98d7cfSKaiGai Kohei je32_to_cpu(rx.version), xd->version); 196aa98d7cfSKaiGai Kohei return EIO; 197aa98d7cfSKaiGai Kohei } 198aa98d7cfSKaiGai Kohei xd->xprefix = rx.xprefix; 199aa98d7cfSKaiGai Kohei xd->name_len = rx.name_len; 200aa98d7cfSKaiGai Kohei xd->value_len = je16_to_cpu(rx.value_len); 201aa98d7cfSKaiGai Kohei xd->data_crc = je32_to_cpu(rx.data_crc); 202aa98d7cfSKaiGai Kohei 203aa98d7cfSKaiGai Kohei /* This JFFS2_NODETYPE_XATTR node is checked */ 204aa98d7cfSKaiGai Kohei jeb = &c->blocks[ref_offset(xd->node) / c->sector_size]; 205aa98d7cfSKaiGai Kohei totlen = PAD(je32_to_cpu(rx.totlen)); 206aa98d7cfSKaiGai Kohei 207aa98d7cfSKaiGai Kohei spin_lock(&c->erase_completion_lock); 208aa98d7cfSKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 209aa98d7cfSKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 210aa98d7cfSKaiGai Kohei xd->node->flash_offset = ref_offset(xd->node) | REF_PRISTINE; 211aa98d7cfSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 212aa98d7cfSKaiGai Kohei 213aa98d7cfSKaiGai Kohei /* unchecked xdatum is chained with c->xattr_unchecked */ 214aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 215aa98d7cfSKaiGai Kohei 216aa98d7cfSKaiGai Kohei dbg_xattr("success on verfying xdatum (xid=%u, version=%u)\n", 217aa98d7cfSKaiGai Kohei xd->xid, xd->version); 218aa98d7cfSKaiGai Kohei 219aa98d7cfSKaiGai Kohei return 0; 220aa98d7cfSKaiGai Kohei } 221aa98d7cfSKaiGai Kohei 222aa98d7cfSKaiGai Kohei static int do_load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 223aa98d7cfSKaiGai Kohei { 224aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 225aa98d7cfSKaiGai Kohei char *data; 226aa98d7cfSKaiGai Kohei size_t readlen; 227aa98d7cfSKaiGai Kohei uint32_t crc, length; 228aa98d7cfSKaiGai Kohei int i, ret, retry = 0; 229aa98d7cfSKaiGai Kohei 230aa98d7cfSKaiGai Kohei BUG_ON(!xd->node); 231aa98d7cfSKaiGai Kohei BUG_ON(ref_flags(xd->node) != REF_PRISTINE); 232aa98d7cfSKaiGai Kohei BUG_ON(!list_empty(&xd->xindex)); 233aa98d7cfSKaiGai Kohei retry: 234aa98d7cfSKaiGai Kohei length = xd->name_len + 1 + xd->value_len; 235aa98d7cfSKaiGai Kohei data = kmalloc(length, GFP_KERNEL); 236aa98d7cfSKaiGai Kohei if (!data) 237aa98d7cfSKaiGai Kohei return -ENOMEM; 238aa98d7cfSKaiGai Kohei 239aa98d7cfSKaiGai Kohei ret = jffs2_flash_read(c, ref_offset(xd->node)+sizeof(struct jffs2_raw_xattr), 240aa98d7cfSKaiGai Kohei length, &readlen, data); 241aa98d7cfSKaiGai Kohei 242aa98d7cfSKaiGai Kohei if (ret || length!=readlen) { 243aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_flash_read() returned %d, request=%d, readlen=%d, at %#08x\n", 244aa98d7cfSKaiGai Kohei ret, length, readlen, ref_offset(xd->node)); 245aa98d7cfSKaiGai Kohei kfree(data); 246aa98d7cfSKaiGai Kohei return ret ? ret : -EIO; 247aa98d7cfSKaiGai Kohei } 248aa98d7cfSKaiGai Kohei 249aa98d7cfSKaiGai Kohei data[xd->name_len] = '\0'; 250aa98d7cfSKaiGai Kohei crc = crc32(0, data, length); 251aa98d7cfSKaiGai Kohei if (crc != xd->data_crc) { 252aa98d7cfSKaiGai Kohei JFFS2_WARNING("node CRC failed (JFFS2_NODETYPE_XREF)" 253aa98d7cfSKaiGai Kohei " at %#08x, read: 0x%08x calculated: 0x%08x\n", 254aa98d7cfSKaiGai Kohei ref_offset(xd->node), xd->data_crc, crc); 255aa98d7cfSKaiGai Kohei kfree(data); 256aa98d7cfSKaiGai Kohei return EIO; 257aa98d7cfSKaiGai Kohei } 258aa98d7cfSKaiGai Kohei 259aa98d7cfSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_HOT; 260aa98d7cfSKaiGai Kohei xd->xname = data; 261aa98d7cfSKaiGai Kohei xd->xvalue = data + xd->name_len+1; 262aa98d7cfSKaiGai Kohei 263aa98d7cfSKaiGai Kohei c->xdatum_mem_usage += length; 264aa98d7cfSKaiGai Kohei 265aa98d7cfSKaiGai Kohei xd->hashkey = xattr_datum_hashkey(xd->xprefix, xd->xname, xd->xvalue, xd->value_len); 266aa98d7cfSKaiGai Kohei i = xd->hashkey % XATTRINDEX_HASHSIZE; 267aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattrindex[i]); 268aa98d7cfSKaiGai Kohei if (!retry) { 269aa98d7cfSKaiGai Kohei retry = 1; 270aa98d7cfSKaiGai Kohei reclaim_xattr_datum(c); 271aa98d7cfSKaiGai Kohei if (!xd->xname) 272aa98d7cfSKaiGai Kohei goto retry; 273aa98d7cfSKaiGai Kohei } 274aa98d7cfSKaiGai Kohei 275aa98d7cfSKaiGai Kohei dbg_xattr("success on loading xdatum (xid=%u, xprefix=%u, xname='%s')\n", 276aa98d7cfSKaiGai Kohei xd->xid, xd->xprefix, xd->xname); 277aa98d7cfSKaiGai Kohei 278aa98d7cfSKaiGai Kohei return 0; 279aa98d7cfSKaiGai Kohei } 280aa98d7cfSKaiGai Kohei 281aa98d7cfSKaiGai Kohei static int load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 282aa98d7cfSKaiGai Kohei { 283aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem); 284aa98d7cfSKaiGai Kohei * rc < 0 : recoverable error, try again 285aa98d7cfSKaiGai Kohei * rc = 0 : success 286aa98d7cfSKaiGai Kohei * rc > 0 : Unrecoverable error, this node should be deleted. 287aa98d7cfSKaiGai Kohei */ 288aa98d7cfSKaiGai Kohei int rc = 0; 289aa98d7cfSKaiGai Kohei BUG_ON(xd->xname); 290aa98d7cfSKaiGai Kohei if (!xd->node) 291aa98d7cfSKaiGai Kohei return EIO; 292aa98d7cfSKaiGai Kohei if (unlikely(ref_flags(xd->node) != REF_PRISTINE)) { 293aa98d7cfSKaiGai Kohei rc = do_verify_xattr_datum(c, xd); 294aa98d7cfSKaiGai Kohei if (rc > 0) { 295aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 296aa98d7cfSKaiGai Kohei delete_xattr_datum_node(c, xd); 297aa98d7cfSKaiGai Kohei } 298aa98d7cfSKaiGai Kohei } 299aa98d7cfSKaiGai Kohei if (!rc) 300aa98d7cfSKaiGai Kohei rc = do_load_xattr_datum(c, xd); 301aa98d7cfSKaiGai Kohei return rc; 302aa98d7cfSKaiGai Kohei } 303aa98d7cfSKaiGai Kohei 304aa98d7cfSKaiGai Kohei static int save_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, uint32_t phys_ofs) 305aa98d7cfSKaiGai Kohei { 306aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 307aa98d7cfSKaiGai Kohei struct jffs2_raw_xattr rx; 308aa98d7cfSKaiGai Kohei struct jffs2_raw_node_ref *raw; 309aa98d7cfSKaiGai Kohei struct kvec vecs[2]; 310aa98d7cfSKaiGai Kohei uint32_t length; 311aa98d7cfSKaiGai Kohei int rc, totlen; 312aa98d7cfSKaiGai Kohei 313aa98d7cfSKaiGai Kohei BUG_ON(!xd->xname); 314aa98d7cfSKaiGai Kohei 315aa98d7cfSKaiGai Kohei vecs[0].iov_base = ℞ 316aa98d7cfSKaiGai Kohei vecs[0].iov_len = PAD(sizeof(rx)); 317aa98d7cfSKaiGai Kohei vecs[1].iov_base = xd->xname; 318aa98d7cfSKaiGai Kohei vecs[1].iov_len = xd->name_len + 1 + xd->value_len; 319aa98d7cfSKaiGai Kohei totlen = vecs[0].iov_len + vecs[1].iov_len; 320aa98d7cfSKaiGai Kohei 321aa98d7cfSKaiGai Kohei raw = jffs2_alloc_raw_node_ref(); 322aa98d7cfSKaiGai Kohei if (!raw) 323aa98d7cfSKaiGai Kohei return -ENOMEM; 324aa98d7cfSKaiGai Kohei raw->flash_offset = phys_ofs; 325aa98d7cfSKaiGai Kohei raw->next_in_ino = (void *)xd; 326aa98d7cfSKaiGai Kohei 327aa98d7cfSKaiGai Kohei /* Setup raw-xattr */ 328aa98d7cfSKaiGai Kohei rx.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 329aa98d7cfSKaiGai Kohei rx.nodetype = cpu_to_je16(JFFS2_NODETYPE_XATTR); 330aa98d7cfSKaiGai Kohei rx.totlen = cpu_to_je32(PAD(totlen)); 331aa98d7cfSKaiGai Kohei rx.hdr_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_unknown_node) - 4)); 332aa98d7cfSKaiGai Kohei 333aa98d7cfSKaiGai Kohei rx.xid = cpu_to_je32(xd->xid); 334aa98d7cfSKaiGai Kohei rx.version = cpu_to_je32(++xd->version); 335aa98d7cfSKaiGai Kohei rx.xprefix = xd->xprefix; 336aa98d7cfSKaiGai Kohei rx.name_len = xd->name_len; 337aa98d7cfSKaiGai Kohei rx.value_len = cpu_to_je16(xd->value_len); 338aa98d7cfSKaiGai Kohei rx.data_crc = cpu_to_je32(crc32(0, vecs[1].iov_base, vecs[1].iov_len)); 339aa98d7cfSKaiGai Kohei rx.node_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_raw_xattr) - 4)); 340aa98d7cfSKaiGai Kohei 341aa98d7cfSKaiGai Kohei rc = jffs2_flash_writev(c, vecs, 2, phys_ofs, &length, 0); 342aa98d7cfSKaiGai Kohei if (rc || totlen != length) { 343aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_flash_writev()=%d, req=%u, wrote=%u, at %#08x\n", 344aa98d7cfSKaiGai Kohei rc, totlen, length, phys_ofs); 345aa98d7cfSKaiGai Kohei rc = rc ? rc : -EIO; 346aa98d7cfSKaiGai Kohei if (length) { 347aa98d7cfSKaiGai Kohei raw->flash_offset |= REF_OBSOLETE; 348aa98d7cfSKaiGai Kohei raw->next_in_ino = NULL; 349*b64335f2SDavid Woodhouse jffs2_add_physical_node_ref(c, raw, PAD(totlen)); 350aa98d7cfSKaiGai Kohei jffs2_mark_node_obsolete(c, raw); 351aa98d7cfSKaiGai Kohei } else { 352aa98d7cfSKaiGai Kohei jffs2_free_raw_node_ref(raw); 353aa98d7cfSKaiGai Kohei } 354aa98d7cfSKaiGai Kohei return rc; 355aa98d7cfSKaiGai Kohei } 356*b64335f2SDavid Woodhouse 357aa98d7cfSKaiGai Kohei /* success */ 358aa98d7cfSKaiGai Kohei raw->flash_offset |= REF_PRISTINE; 359*b64335f2SDavid Woodhouse jffs2_add_physical_node_ref(c, raw, PAD(totlen)); 360aa98d7cfSKaiGai Kohei if (xd->node) 361aa98d7cfSKaiGai Kohei delete_xattr_datum_node(c, xd); 362aa98d7cfSKaiGai Kohei xd->node = raw; 363aa98d7cfSKaiGai Kohei 364aa98d7cfSKaiGai Kohei dbg_xattr("success on saving xdatum (xid=%u, version=%u, xprefix=%u, xname='%s')\n", 365aa98d7cfSKaiGai Kohei xd->xid, xd->version, xd->xprefix, xd->xname); 366aa98d7cfSKaiGai Kohei 367aa98d7cfSKaiGai Kohei return 0; 368aa98d7cfSKaiGai Kohei } 369aa98d7cfSKaiGai Kohei 370aa98d7cfSKaiGai Kohei static struct jffs2_xattr_datum *create_xattr_datum(struct jffs2_sb_info *c, 371aa98d7cfSKaiGai Kohei int xprefix, const char *xname, 372aa98d7cfSKaiGai Kohei const char *xvalue, int xsize, 373aa98d7cfSKaiGai Kohei uint32_t phys_ofs) 374aa98d7cfSKaiGai Kohei { 375aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 376aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 377aa98d7cfSKaiGai Kohei uint32_t hashkey, name_len; 378aa98d7cfSKaiGai Kohei char *data; 379aa98d7cfSKaiGai Kohei int i, rc; 380aa98d7cfSKaiGai Kohei 381aa98d7cfSKaiGai Kohei /* Search xattr_datum has same xname/xvalue by index */ 382aa98d7cfSKaiGai Kohei hashkey = xattr_datum_hashkey(xprefix, xname, xvalue, xsize); 383aa98d7cfSKaiGai Kohei i = hashkey % XATTRINDEX_HASHSIZE; 384aa98d7cfSKaiGai Kohei list_for_each_entry(xd, &c->xattrindex[i], xindex) { 385aa98d7cfSKaiGai Kohei if (xd->hashkey==hashkey 386aa98d7cfSKaiGai Kohei && xd->xprefix==xprefix 387aa98d7cfSKaiGai Kohei && xd->value_len==xsize 388aa98d7cfSKaiGai Kohei && !strcmp(xd->xname, xname) 389aa98d7cfSKaiGai Kohei && !memcmp(xd->xvalue, xvalue, xsize)) { 390aa98d7cfSKaiGai Kohei xd->refcnt++; 391aa98d7cfSKaiGai Kohei return xd; 392aa98d7cfSKaiGai Kohei } 393aa98d7cfSKaiGai Kohei } 394aa98d7cfSKaiGai Kohei 395aa98d7cfSKaiGai Kohei /* Not found, Create NEW XATTR-Cache */ 396aa98d7cfSKaiGai Kohei name_len = strlen(xname); 397aa98d7cfSKaiGai Kohei 398aa98d7cfSKaiGai Kohei xd = jffs2_alloc_xattr_datum(); 399aa98d7cfSKaiGai Kohei if (!xd) 400aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 401aa98d7cfSKaiGai Kohei 402aa98d7cfSKaiGai Kohei data = kmalloc(name_len + 1 + xsize, GFP_KERNEL); 403aa98d7cfSKaiGai Kohei if (!data) { 404aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 405aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 406aa98d7cfSKaiGai Kohei } 407aa98d7cfSKaiGai Kohei strcpy(data, xname); 408aa98d7cfSKaiGai Kohei memcpy(data + name_len + 1, xvalue, xsize); 409aa98d7cfSKaiGai Kohei 410aa98d7cfSKaiGai Kohei xd->refcnt = 1; 411aa98d7cfSKaiGai Kohei xd->xid = ++c->highest_xid; 412aa98d7cfSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_HOT; 413aa98d7cfSKaiGai Kohei xd->xprefix = xprefix; 414aa98d7cfSKaiGai Kohei 415aa98d7cfSKaiGai Kohei xd->hashkey = hashkey; 416aa98d7cfSKaiGai Kohei xd->xname = data; 417aa98d7cfSKaiGai Kohei xd->xvalue = data + name_len + 1; 418aa98d7cfSKaiGai Kohei xd->name_len = name_len; 419aa98d7cfSKaiGai Kohei xd->value_len = xsize; 420aa98d7cfSKaiGai Kohei xd->data_crc = crc32(0, data, xd->name_len + 1 + xd->value_len); 421aa98d7cfSKaiGai Kohei 422aa98d7cfSKaiGai Kohei rc = save_xattr_datum(c, xd, phys_ofs); 423aa98d7cfSKaiGai Kohei if (rc) { 424aa98d7cfSKaiGai Kohei kfree(xd->xname); 425aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 426aa98d7cfSKaiGai Kohei return ERR_PTR(rc); 427aa98d7cfSKaiGai Kohei } 428aa98d7cfSKaiGai Kohei 429aa98d7cfSKaiGai Kohei /* Insert Hash Index */ 430aa98d7cfSKaiGai Kohei i = hashkey % XATTRINDEX_HASHSIZE; 431aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattrindex[i]); 432aa98d7cfSKaiGai Kohei 433aa98d7cfSKaiGai Kohei c->xdatum_mem_usage += (xd->name_len + 1 + xd->value_len); 434aa98d7cfSKaiGai Kohei reclaim_xattr_datum(c); 435aa98d7cfSKaiGai Kohei 436aa98d7cfSKaiGai Kohei return xd; 437aa98d7cfSKaiGai Kohei } 438aa98d7cfSKaiGai Kohei 43921b9879bSKaiGai Kohei /* -------- xref related functions ------------------ 440aa98d7cfSKaiGai Kohei * verify_xattr_ref(c, ref) 441aa98d7cfSKaiGai Kohei * is used to load xref information from medium. Because summary data does not 442aa98d7cfSKaiGai Kohei * contain xid/ino, it's necessary to verify once while mounting process. 443aa98d7cfSKaiGai Kohei * delete_xattr_ref_node(c, ref) 444aa98d7cfSKaiGai Kohei * is used to delete a jffs2 node is dominated by xref. When EBS is enabled, 445aa98d7cfSKaiGai Kohei * it overwrites the obsolete node by myself. 446aa98d7cfSKaiGai Kohei * delete_xattr_ref(c, ref) 447aa98d7cfSKaiGai Kohei * is used to delete jffs2_xattr_ref object. If the reference counter of xdatum 448aa98d7cfSKaiGai Kohei * is refered by this xref become 0, delete_xattr_datum() is called later. 449aa98d7cfSKaiGai Kohei * save_xattr_ref(c, ref, phys_ofs) 450aa98d7cfSKaiGai Kohei * is used to write xref to medium. 451aa98d7cfSKaiGai Kohei * create_xattr_ref(c, ic, xd, phys_ofs) 452aa98d7cfSKaiGai Kohei * is used to create a new xref and write to medium. 453aa98d7cfSKaiGai Kohei * jffs2_xattr_delete_inode(c, ic) 454aa98d7cfSKaiGai Kohei * is called to remove xrefs related to obsolete inode when inode is unlinked. 455aa98d7cfSKaiGai Kohei * jffs2_xattr_free_inode(c, ic) 456aa98d7cfSKaiGai Kohei * is called to release xattr related objects when unmounting. 4578f2b6f49SKaiGai Kohei * check_xattr_ref_inode(c, ic) 458aa98d7cfSKaiGai Kohei * is used to confirm inode does not have duplicate xattr name/value pair. 459aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 460aa98d7cfSKaiGai Kohei static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 461aa98d7cfSKaiGai Kohei { 462aa98d7cfSKaiGai Kohei struct jffs2_eraseblock *jeb; 463aa98d7cfSKaiGai Kohei struct jffs2_raw_xref rr; 464aa98d7cfSKaiGai Kohei size_t readlen; 465aa98d7cfSKaiGai Kohei uint32_t crc, totlen; 466aa98d7cfSKaiGai Kohei int rc; 467aa98d7cfSKaiGai Kohei 468aa98d7cfSKaiGai Kohei BUG_ON(ref_flags(ref->node) != REF_UNCHECKED); 469aa98d7cfSKaiGai Kohei 470aa98d7cfSKaiGai Kohei rc = jffs2_flash_read(c, ref_offset(ref->node), sizeof(rr), &readlen, (char *)&rr); 471aa98d7cfSKaiGai Kohei if (rc || sizeof(rr) != readlen) { 472aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_flash_read()=%d, req=%u, read=%u, at %#08x\n", 473aa98d7cfSKaiGai Kohei rc, sizeof(rr), readlen, ref_offset(ref->node)); 474aa98d7cfSKaiGai Kohei return rc ? rc : -EIO; 475aa98d7cfSKaiGai Kohei } 476aa98d7cfSKaiGai Kohei /* obsolete node */ 477aa98d7cfSKaiGai Kohei crc = crc32(0, &rr, sizeof(rr) - 4); 478aa98d7cfSKaiGai Kohei if (crc != je32_to_cpu(rr.node_crc)) { 479aa98d7cfSKaiGai Kohei if (je32_to_cpu(rr.node_crc) != 0xffffffff) 480aa98d7cfSKaiGai Kohei JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", 481aa98d7cfSKaiGai Kohei ref_offset(ref->node), je32_to_cpu(rr.node_crc), crc); 482aa98d7cfSKaiGai Kohei return EIO; 483aa98d7cfSKaiGai Kohei } 484aa98d7cfSKaiGai Kohei if (je16_to_cpu(rr.magic) != JFFS2_MAGIC_BITMASK 485aa98d7cfSKaiGai Kohei || je16_to_cpu(rr.nodetype) != JFFS2_NODETYPE_XREF 486aa98d7cfSKaiGai Kohei || je32_to_cpu(rr.totlen) != PAD(sizeof(rr))) { 487aa98d7cfSKaiGai Kohei JFFS2_ERROR("inconsistent xref at %#08x, magic=%#04x/%#04x, " 488aa98d7cfSKaiGai Kohei "nodetype=%#04x/%#04x, totlen=%u/%u\n", 489aa98d7cfSKaiGai Kohei ref_offset(ref->node), je16_to_cpu(rr.magic), JFFS2_MAGIC_BITMASK, 490aa98d7cfSKaiGai Kohei je16_to_cpu(rr.nodetype), JFFS2_NODETYPE_XREF, 491aa98d7cfSKaiGai Kohei je32_to_cpu(rr.totlen), PAD(sizeof(rr))); 492aa98d7cfSKaiGai Kohei return EIO; 493aa98d7cfSKaiGai Kohei } 494aa98d7cfSKaiGai Kohei ref->ino = je32_to_cpu(rr.ino); 495aa98d7cfSKaiGai Kohei ref->xid = je32_to_cpu(rr.xid); 496aa98d7cfSKaiGai Kohei 497aa98d7cfSKaiGai Kohei /* fixup superblock/eraseblock info */ 498aa98d7cfSKaiGai Kohei jeb = &c->blocks[ref_offset(ref->node) / c->sector_size]; 499aa98d7cfSKaiGai Kohei totlen = PAD(sizeof(rr)); 500aa98d7cfSKaiGai Kohei 501aa98d7cfSKaiGai Kohei spin_lock(&c->erase_completion_lock); 502aa98d7cfSKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 503aa98d7cfSKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 504aa98d7cfSKaiGai Kohei ref->node->flash_offset = ref_offset(ref->node) | REF_PRISTINE; 505aa98d7cfSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 506aa98d7cfSKaiGai Kohei 507aa98d7cfSKaiGai Kohei dbg_xattr("success on verifying xref (ino=%u, xid=%u) at %#08x\n", 508aa98d7cfSKaiGai Kohei ref->ino, ref->xid, ref_offset(ref->node)); 509aa98d7cfSKaiGai Kohei return 0; 510aa98d7cfSKaiGai Kohei } 511aa98d7cfSKaiGai Kohei 512aa98d7cfSKaiGai Kohei static void delete_xattr_ref_node(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 513aa98d7cfSKaiGai Kohei { 514aa98d7cfSKaiGai Kohei struct jffs2_raw_xref rr; 515aa98d7cfSKaiGai Kohei uint32_t length; 516aa98d7cfSKaiGai Kohei int rc; 517aa98d7cfSKaiGai Kohei 518aa98d7cfSKaiGai Kohei if (jffs2_sum_active()) { 519aa98d7cfSKaiGai Kohei memset(&rr, 0xff, sizeof(rr)); 520aa98d7cfSKaiGai Kohei rc = jffs2_flash_read(c, ref_offset(ref->node), 521aa98d7cfSKaiGai Kohei sizeof(struct jffs2_unknown_node), 522aa98d7cfSKaiGai Kohei &length, (char *)&rr); 523aa98d7cfSKaiGai Kohei if (rc || length != sizeof(struct jffs2_unknown_node)) { 524aa98d7cfSKaiGai Kohei JFFS2_ERROR("jffs2_flash_read()=%d, req=%u, read=%u at %#08x\n", 525aa98d7cfSKaiGai Kohei rc, sizeof(struct jffs2_unknown_node), 526aa98d7cfSKaiGai Kohei length, ref_offset(ref->node)); 527aa98d7cfSKaiGai Kohei } 528aa98d7cfSKaiGai Kohei rc = jffs2_flash_write(c, ref_offset(ref->node), sizeof(rr), 529aa98d7cfSKaiGai Kohei &length, (char *)&rr); 530aa98d7cfSKaiGai Kohei if (rc || length != sizeof(struct jffs2_raw_xref)) { 531aa98d7cfSKaiGai Kohei JFFS2_ERROR("jffs2_flash_write()=%d, req=%u, wrote=%u at %#08x\n", 532aa98d7cfSKaiGai Kohei rc, sizeof(rr), length, ref_offset(ref->node)); 533aa98d7cfSKaiGai Kohei } 534aa98d7cfSKaiGai Kohei } 535aa98d7cfSKaiGai Kohei spin_lock(&c->erase_completion_lock); 536aa98d7cfSKaiGai Kohei ref->node->next_in_ino = NULL; 537aa98d7cfSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 538aa98d7cfSKaiGai Kohei jffs2_mark_node_obsolete(c, ref->node); 539aa98d7cfSKaiGai Kohei ref->node = NULL; 540aa98d7cfSKaiGai Kohei } 541aa98d7cfSKaiGai Kohei 542aa98d7cfSKaiGai Kohei static void delete_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 543aa98d7cfSKaiGai Kohei { 544aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 545aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 546aa98d7cfSKaiGai Kohei 547aa98d7cfSKaiGai Kohei BUG_ON(!ref->node); 548aa98d7cfSKaiGai Kohei delete_xattr_ref_node(c, ref); 549aa98d7cfSKaiGai Kohei 550aa98d7cfSKaiGai Kohei xd = ref->xd; 551aa98d7cfSKaiGai Kohei xd->refcnt--; 552aa98d7cfSKaiGai Kohei if (!xd->refcnt) 553aa98d7cfSKaiGai Kohei delete_xattr_datum(c, xd); 554aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 555aa98d7cfSKaiGai Kohei } 556aa98d7cfSKaiGai Kohei 557aa98d7cfSKaiGai Kohei static int save_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, uint32_t phys_ofs) 558aa98d7cfSKaiGai Kohei { 559aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 560aa98d7cfSKaiGai Kohei struct jffs2_raw_node_ref *raw; 561aa98d7cfSKaiGai Kohei struct jffs2_raw_xref rr; 562aa98d7cfSKaiGai Kohei uint32_t length; 563aa98d7cfSKaiGai Kohei int ret; 564aa98d7cfSKaiGai Kohei 565aa98d7cfSKaiGai Kohei raw = jffs2_alloc_raw_node_ref(); 566aa98d7cfSKaiGai Kohei if (!raw) 567aa98d7cfSKaiGai Kohei return -ENOMEM; 568aa98d7cfSKaiGai Kohei raw->flash_offset = phys_ofs; 569aa98d7cfSKaiGai Kohei raw->next_in_ino = (void *)ref; 570aa98d7cfSKaiGai Kohei 571aa98d7cfSKaiGai Kohei rr.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 572aa98d7cfSKaiGai Kohei rr.nodetype = cpu_to_je16(JFFS2_NODETYPE_XREF); 573aa98d7cfSKaiGai Kohei rr.totlen = cpu_to_je32(PAD(sizeof(rr))); 574aa98d7cfSKaiGai Kohei rr.hdr_crc = cpu_to_je32(crc32(0, &rr, sizeof(struct jffs2_unknown_node) - 4)); 575aa98d7cfSKaiGai Kohei 576aa98d7cfSKaiGai Kohei rr.ino = cpu_to_je32(ref->ic->ino); 577aa98d7cfSKaiGai Kohei rr.xid = cpu_to_je32(ref->xd->xid); 578aa98d7cfSKaiGai Kohei rr.node_crc = cpu_to_je32(crc32(0, &rr, sizeof(rr) - 4)); 579aa98d7cfSKaiGai Kohei 580aa98d7cfSKaiGai Kohei ret = jffs2_flash_write(c, phys_ofs, sizeof(rr), &length, (char *)&rr); 581aa98d7cfSKaiGai Kohei if (ret || sizeof(rr) != length) { 582aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_flash_write() returned %d, request=%u, retlen=%u, at %#08x\n", 583aa98d7cfSKaiGai Kohei ret, sizeof(rr), length, phys_ofs); 584aa98d7cfSKaiGai Kohei ret = ret ? ret : -EIO; 585aa98d7cfSKaiGai Kohei if (length) { 586aa98d7cfSKaiGai Kohei raw->flash_offset |= REF_OBSOLETE; 587aa98d7cfSKaiGai Kohei raw->next_in_ino = NULL; 588*b64335f2SDavid Woodhouse jffs2_add_physical_node_ref(c, raw, PAD(sizeof(rr))); 589aa98d7cfSKaiGai Kohei jffs2_mark_node_obsolete(c, raw); 590aa98d7cfSKaiGai Kohei } else { 591aa98d7cfSKaiGai Kohei jffs2_free_raw_node_ref(raw); 592aa98d7cfSKaiGai Kohei } 593aa98d7cfSKaiGai Kohei return ret; 594aa98d7cfSKaiGai Kohei } 595aa98d7cfSKaiGai Kohei raw->flash_offset |= REF_PRISTINE; 596aa98d7cfSKaiGai Kohei 597*b64335f2SDavid Woodhouse jffs2_add_physical_node_ref(c, raw, PAD(sizeof(rr))); 598aa98d7cfSKaiGai Kohei if (ref->node) 599aa98d7cfSKaiGai Kohei delete_xattr_ref_node(c, ref); 600aa98d7cfSKaiGai Kohei ref->node = raw; 601aa98d7cfSKaiGai Kohei 602aa98d7cfSKaiGai Kohei dbg_xattr("success on saving xref (ino=%u, xid=%u)\n", ref->ic->ino, ref->xd->xid); 603aa98d7cfSKaiGai Kohei 604aa98d7cfSKaiGai Kohei return 0; 605aa98d7cfSKaiGai Kohei } 606aa98d7cfSKaiGai Kohei 607aa98d7cfSKaiGai Kohei static struct jffs2_xattr_ref *create_xattr_ref(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, 608aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, uint32_t phys_ofs) 609aa98d7cfSKaiGai Kohei { 610aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 611aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref; 612aa98d7cfSKaiGai Kohei int ret; 613aa98d7cfSKaiGai Kohei 614aa98d7cfSKaiGai Kohei ref = jffs2_alloc_xattr_ref(); 615aa98d7cfSKaiGai Kohei if (!ref) 616aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 617aa98d7cfSKaiGai Kohei ref->ic = ic; 618aa98d7cfSKaiGai Kohei ref->xd = xd; 619aa98d7cfSKaiGai Kohei 620aa98d7cfSKaiGai Kohei ret = save_xattr_ref(c, ref, phys_ofs); 621aa98d7cfSKaiGai Kohei if (ret) { 622aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 623aa98d7cfSKaiGai Kohei return ERR_PTR(ret); 624aa98d7cfSKaiGai Kohei } 625aa98d7cfSKaiGai Kohei 626aa98d7cfSKaiGai Kohei /* Chain to inode */ 6278f2b6f49SKaiGai Kohei ref->next = ic->xref; 6288f2b6f49SKaiGai Kohei ic->xref = ref; 629aa98d7cfSKaiGai Kohei 630aa98d7cfSKaiGai Kohei return ref; /* success */ 631aa98d7cfSKaiGai Kohei } 632aa98d7cfSKaiGai Kohei 633aa98d7cfSKaiGai Kohei void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 634aa98d7cfSKaiGai Kohei { 635aa98d7cfSKaiGai Kohei /* It's called from jffs2_clear_inode() on inode removing. 636aa98d7cfSKaiGai Kohei When an inode with XATTR is removed, those XATTRs must be removed. */ 637aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 638aa98d7cfSKaiGai Kohei 639aa98d7cfSKaiGai Kohei if (!ic || ic->nlink > 0) 640aa98d7cfSKaiGai Kohei return; 641aa98d7cfSKaiGai Kohei 642aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 6438f2b6f49SKaiGai Kohei for (ref = ic->xref; ref; ref = _ref) { 6448f2b6f49SKaiGai Kohei _ref = ref->next; 645aa98d7cfSKaiGai Kohei delete_xattr_ref(c, ref); 6468f2b6f49SKaiGai Kohei } 6478f2b6f49SKaiGai Kohei ic->xref = NULL; 648aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 649aa98d7cfSKaiGai Kohei } 650aa98d7cfSKaiGai Kohei 651aa98d7cfSKaiGai Kohei void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 652aa98d7cfSKaiGai Kohei { 653aa98d7cfSKaiGai Kohei /* It's called from jffs2_free_ino_caches() until unmounting FS. */ 654aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 655aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 656aa98d7cfSKaiGai Kohei 657aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 6588f2b6f49SKaiGai Kohei for (ref = ic->xref; ref; ref = _ref) { 6598f2b6f49SKaiGai Kohei _ref = ref->next; 660aa98d7cfSKaiGai Kohei xd = ref->xd; 661aa98d7cfSKaiGai Kohei xd->refcnt--; 662aa98d7cfSKaiGai Kohei if (!xd->refcnt) { 663aa98d7cfSKaiGai Kohei unload_xattr_datum(c, xd); 664aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 665aa98d7cfSKaiGai Kohei } 666aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 667aa98d7cfSKaiGai Kohei } 6688f2b6f49SKaiGai Kohei ic->xref = NULL; 669aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 670aa98d7cfSKaiGai Kohei } 671aa98d7cfSKaiGai Kohei 6728f2b6f49SKaiGai Kohei static int check_xattr_ref_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 673aa98d7cfSKaiGai Kohei { 6748f2b6f49SKaiGai Kohei /* success of check_xattr_ref_inode() means taht inode (ic) dose not have 675aa98d7cfSKaiGai Kohei * duplicate name/value pairs. If duplicate name/value pair would be found, 676aa98d7cfSKaiGai Kohei * one will be removed. 677aa98d7cfSKaiGai Kohei */ 6788f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, *cmp, **pref; 679aa98d7cfSKaiGai Kohei int rc = 0; 680aa98d7cfSKaiGai Kohei 681aa98d7cfSKaiGai Kohei if (likely(ic->flags & INO_FLAGS_XATTR_CHECKED)) 682aa98d7cfSKaiGai Kohei return 0; 683aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 684aa98d7cfSKaiGai Kohei retry: 685aa98d7cfSKaiGai Kohei rc = 0; 6868f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 687aa98d7cfSKaiGai Kohei if (!ref->xd->xname) { 688aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, ref->xd); 689aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 6908f2b6f49SKaiGai Kohei *pref = ref->next; 691aa98d7cfSKaiGai Kohei delete_xattr_ref(c, ref); 692aa98d7cfSKaiGai Kohei goto retry; 693aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 694aa98d7cfSKaiGai Kohei goto out; 695aa98d7cfSKaiGai Kohei } 6968f2b6f49SKaiGai Kohei for (cmp=ref->next, pref=&ref->next; cmp; pref=&cmp->next, cmp=cmp->next) { 697aa98d7cfSKaiGai Kohei if (!cmp->xd->xname) { 698aa98d7cfSKaiGai Kohei ref->xd->flags |= JFFS2_XFLAGS_BIND; 699aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, cmp->xd); 700aa98d7cfSKaiGai Kohei ref->xd->flags &= ~JFFS2_XFLAGS_BIND; 701aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 7028f2b6f49SKaiGai Kohei *pref = cmp->next; 703aa98d7cfSKaiGai Kohei delete_xattr_ref(c, cmp); 704aa98d7cfSKaiGai Kohei goto retry; 705aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 706aa98d7cfSKaiGai Kohei goto out; 707aa98d7cfSKaiGai Kohei } 708aa98d7cfSKaiGai Kohei if (ref->xd->xprefix == cmp->xd->xprefix 709aa98d7cfSKaiGai Kohei && !strcmp(ref->xd->xname, cmp->xd->xname)) { 7108f2b6f49SKaiGai Kohei *pref = cmp->next; 711aa98d7cfSKaiGai Kohei delete_xattr_ref(c, cmp); 712aa98d7cfSKaiGai Kohei goto retry; 713aa98d7cfSKaiGai Kohei } 714aa98d7cfSKaiGai Kohei } 715aa98d7cfSKaiGai Kohei } 716aa98d7cfSKaiGai Kohei ic->flags |= INO_FLAGS_XATTR_CHECKED; 717aa98d7cfSKaiGai Kohei out: 718aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 719aa98d7cfSKaiGai Kohei 720aa98d7cfSKaiGai Kohei return rc; 721aa98d7cfSKaiGai Kohei } 722aa98d7cfSKaiGai Kohei 723aa98d7cfSKaiGai Kohei /* -------- xattr subsystem functions --------------- 724aa98d7cfSKaiGai Kohei * jffs2_init_xattr_subsystem(c) 725aa98d7cfSKaiGai Kohei * is used to initialize semaphore and list_head, and some variables. 726aa98d7cfSKaiGai Kohei * jffs2_find_xattr_datum(c, xid) 727aa98d7cfSKaiGai Kohei * is used to lookup xdatum while scanning process. 728aa98d7cfSKaiGai Kohei * jffs2_clear_xattr_subsystem(c) 729aa98d7cfSKaiGai Kohei * is used to release any xattr related objects. 730aa98d7cfSKaiGai Kohei * jffs2_build_xattr_subsystem(c) 731aa98d7cfSKaiGai Kohei * is used to associate xdatum and xref while super block building process. 732aa98d7cfSKaiGai Kohei * jffs2_setup_xattr_datum(c, xid, version) 733aa98d7cfSKaiGai Kohei * is used to insert xdatum while scanning process. 734aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 735aa98d7cfSKaiGai Kohei void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c) 736aa98d7cfSKaiGai Kohei { 737aa98d7cfSKaiGai Kohei int i; 738aa98d7cfSKaiGai Kohei 739aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) 740aa98d7cfSKaiGai Kohei INIT_LIST_HEAD(&c->xattrindex[i]); 741aa98d7cfSKaiGai Kohei INIT_LIST_HEAD(&c->xattr_unchecked); 7428f2b6f49SKaiGai Kohei c->xref_temp = NULL; 743aa98d7cfSKaiGai Kohei 744aa98d7cfSKaiGai Kohei init_rwsem(&c->xattr_sem); 745aa98d7cfSKaiGai Kohei c->xdatum_mem_usage = 0; 746aa98d7cfSKaiGai Kohei c->xdatum_mem_threshold = 32 * 1024; /* Default 32KB */ 747aa98d7cfSKaiGai Kohei } 748aa98d7cfSKaiGai Kohei 749aa98d7cfSKaiGai Kohei static struct jffs2_xattr_datum *jffs2_find_xattr_datum(struct jffs2_sb_info *c, uint32_t xid) 750aa98d7cfSKaiGai Kohei { 751aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 752aa98d7cfSKaiGai Kohei int i = xid % XATTRINDEX_HASHSIZE; 753aa98d7cfSKaiGai Kohei 754aa98d7cfSKaiGai Kohei /* It's only used in scanning/building process. */ 755aa98d7cfSKaiGai Kohei BUG_ON(!(c->flags & (JFFS2_SB_FLAG_SCANNING|JFFS2_SB_FLAG_BUILDING))); 756aa98d7cfSKaiGai Kohei 757aa98d7cfSKaiGai Kohei list_for_each_entry(xd, &c->xattrindex[i], xindex) { 758aa98d7cfSKaiGai Kohei if (xd->xid==xid) 759aa98d7cfSKaiGai Kohei return xd; 760aa98d7cfSKaiGai Kohei } 761aa98d7cfSKaiGai Kohei return NULL; 762aa98d7cfSKaiGai Kohei } 763aa98d7cfSKaiGai Kohei 764aa98d7cfSKaiGai Kohei void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c) 765aa98d7cfSKaiGai Kohei { 766aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 767aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 768aa98d7cfSKaiGai Kohei int i; 769aa98d7cfSKaiGai Kohei 7708f2b6f49SKaiGai Kohei for (ref=c->xref_temp; ref; ref = _ref) { 7718f2b6f49SKaiGai Kohei _ref = ref->next; 772aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 7738f2b6f49SKaiGai Kohei } 7748f2b6f49SKaiGai Kohei c->xref_temp = NULL; 775aa98d7cfSKaiGai Kohei 776aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) { 777aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { 778aa98d7cfSKaiGai Kohei list_del(&xd->xindex); 779aa98d7cfSKaiGai Kohei if (xd->xname) 780aa98d7cfSKaiGai Kohei kfree(xd->xname); 781aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 782aa98d7cfSKaiGai Kohei } 783aa98d7cfSKaiGai Kohei } 784aa98d7cfSKaiGai Kohei } 785aa98d7cfSKaiGai Kohei 786aa98d7cfSKaiGai Kohei void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c) 787aa98d7cfSKaiGai Kohei { 788aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 789aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 790aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic; 791aa98d7cfSKaiGai Kohei int i, xdatum_count =0, xdatum_unchecked_count = 0, xref_count = 0; 792aa98d7cfSKaiGai Kohei 793aa98d7cfSKaiGai Kohei BUG_ON(!(c->flags & JFFS2_SB_FLAG_BUILDING)); 794aa98d7cfSKaiGai Kohei 795aa98d7cfSKaiGai Kohei /* Phase.1 */ 7968f2b6f49SKaiGai Kohei for (ref=c->xref_temp; ref; ref=_ref) { 7978f2b6f49SKaiGai Kohei _ref = ref->next; 798aa98d7cfSKaiGai Kohei /* checking REF_UNCHECKED nodes */ 799aa98d7cfSKaiGai Kohei if (ref_flags(ref->node) != REF_PRISTINE) { 800aa98d7cfSKaiGai Kohei if (verify_xattr_ref(c, ref)) { 801aa98d7cfSKaiGai Kohei delete_xattr_ref_node(c, ref); 802aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 803aa98d7cfSKaiGai Kohei continue; 804aa98d7cfSKaiGai Kohei } 805aa98d7cfSKaiGai Kohei } 806aa98d7cfSKaiGai Kohei /* At this point, ref->xid and ref->ino contain XID and inode number. 807aa98d7cfSKaiGai Kohei ref->xd and ref->ic are not valid yet. */ 808aa98d7cfSKaiGai Kohei xd = jffs2_find_xattr_datum(c, ref->xid); 809aa98d7cfSKaiGai Kohei ic = jffs2_get_ino_cache(c, ref->ino); 810aa98d7cfSKaiGai Kohei if (!xd || !ic) { 811aa98d7cfSKaiGai Kohei if (ref_flags(ref->node) != REF_UNCHECKED) 812aa98d7cfSKaiGai Kohei JFFS2_WARNING("xref(ino=%u, xid=%u) is orphan. \n", 813aa98d7cfSKaiGai Kohei ref->ino, ref->xid); 814aa98d7cfSKaiGai Kohei delete_xattr_ref_node(c, ref); 815aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 816aa98d7cfSKaiGai Kohei continue; 817aa98d7cfSKaiGai Kohei } 818aa98d7cfSKaiGai Kohei ref->xd = xd; 819aa98d7cfSKaiGai Kohei ref->ic = ic; 820aa98d7cfSKaiGai Kohei xd->refcnt++; 8218f2b6f49SKaiGai Kohei ref->next = ic->xref; 8228f2b6f49SKaiGai Kohei ic->xref = ref; 823aa98d7cfSKaiGai Kohei xref_count++; 824aa98d7cfSKaiGai Kohei } 8258f2b6f49SKaiGai Kohei c->xref_temp = NULL; 826aa98d7cfSKaiGai Kohei /* After this, ref->xid/ino are NEVER used. */ 827aa98d7cfSKaiGai Kohei 828aa98d7cfSKaiGai Kohei /* Phase.2 */ 829aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) { 830aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { 831aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 832aa98d7cfSKaiGai Kohei if (!xd->refcnt) { 833aa98d7cfSKaiGai Kohei if (ref_flags(xd->node) != REF_UNCHECKED) 834aa98d7cfSKaiGai Kohei JFFS2_WARNING("orphan xdatum(xid=%u, version=%u) at %#08x\n", 835aa98d7cfSKaiGai Kohei xd->xid, xd->version, ref_offset(xd->node)); 836aa98d7cfSKaiGai Kohei delete_xattr_datum(c, xd); 837aa98d7cfSKaiGai Kohei continue; 838aa98d7cfSKaiGai Kohei } 839aa98d7cfSKaiGai Kohei if (ref_flags(xd->node) != REF_PRISTINE) { 840aa98d7cfSKaiGai Kohei dbg_xattr("unchecked xdatum(xid=%u) at %#08x\n", 841aa98d7cfSKaiGai Kohei xd->xid, ref_offset(xd->node)); 842aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattr_unchecked); 843aa98d7cfSKaiGai Kohei xdatum_unchecked_count++; 844aa98d7cfSKaiGai Kohei } 845aa98d7cfSKaiGai Kohei xdatum_count++; 846aa98d7cfSKaiGai Kohei } 847aa98d7cfSKaiGai Kohei } 848aa98d7cfSKaiGai Kohei /* build complete */ 849aa98d7cfSKaiGai Kohei JFFS2_NOTICE("complete building xattr subsystem, %u of xdatum (%u unchecked) and " 850aa98d7cfSKaiGai Kohei "%u of xref found.\n", xdatum_count, xdatum_unchecked_count, xref_count); 851aa98d7cfSKaiGai Kohei } 852aa98d7cfSKaiGai Kohei 853aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, 854aa98d7cfSKaiGai Kohei uint32_t xid, uint32_t version) 855aa98d7cfSKaiGai Kohei { 856aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 857aa98d7cfSKaiGai Kohei 858aa98d7cfSKaiGai Kohei _xd = jffs2_find_xattr_datum(c, xid); 859aa98d7cfSKaiGai Kohei if (_xd) { 860aa98d7cfSKaiGai Kohei dbg_xattr("duplicate xdatum (xid=%u, version=%u/%u) at %#08x\n", 861aa98d7cfSKaiGai Kohei xid, version, _xd->version, ref_offset(_xd->node)); 862aa98d7cfSKaiGai Kohei if (version < _xd->version) 863aa98d7cfSKaiGai Kohei return ERR_PTR(-EEXIST); 864aa98d7cfSKaiGai Kohei } 865aa98d7cfSKaiGai Kohei xd = jffs2_alloc_xattr_datum(); 866aa98d7cfSKaiGai Kohei if (!xd) 867aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 868aa98d7cfSKaiGai Kohei xd->xid = xid; 869aa98d7cfSKaiGai Kohei xd->version = version; 870aa98d7cfSKaiGai Kohei if (xd->xid > c->highest_xid) 871aa98d7cfSKaiGai Kohei c->highest_xid = xd->xid; 872aa98d7cfSKaiGai Kohei list_add_tail(&xd->xindex, &c->xattrindex[xid % XATTRINDEX_HASHSIZE]); 873aa98d7cfSKaiGai Kohei 874aa98d7cfSKaiGai Kohei if (_xd) { 875aa98d7cfSKaiGai Kohei list_del_init(&_xd->xindex); 876aa98d7cfSKaiGai Kohei delete_xattr_datum_node(c, _xd); 877aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(_xd); 878aa98d7cfSKaiGai Kohei } 879aa98d7cfSKaiGai Kohei return xd; 880aa98d7cfSKaiGai Kohei } 881aa98d7cfSKaiGai Kohei 882aa98d7cfSKaiGai Kohei /* -------- xattr subsystem functions --------------- 883aa98d7cfSKaiGai Kohei * xprefix_to_handler(xprefix) 884aa98d7cfSKaiGai Kohei * is used to translate xprefix into xattr_handler. 885aa98d7cfSKaiGai Kohei * jffs2_listxattr(dentry, buffer, size) 886aa98d7cfSKaiGai Kohei * is an implementation of listxattr handler on jffs2. 887aa98d7cfSKaiGai Kohei * do_jffs2_getxattr(inode, xprefix, xname, buffer, size) 888aa98d7cfSKaiGai Kohei * is an implementation of getxattr handler on jffs2. 889aa98d7cfSKaiGai Kohei * do_jffs2_setxattr(inode, xprefix, xname, buffer, size, flags) 890aa98d7cfSKaiGai Kohei * is an implementation of setxattr handler on jffs2. 891aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 892aa98d7cfSKaiGai Kohei struct xattr_handler *jffs2_xattr_handlers[] = { 893aa98d7cfSKaiGai Kohei &jffs2_user_xattr_handler, 894aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 895aa98d7cfSKaiGai Kohei &jffs2_security_xattr_handler, 896aa98d7cfSKaiGai Kohei #endif 897aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 898aa98d7cfSKaiGai Kohei &jffs2_acl_access_xattr_handler, 899aa98d7cfSKaiGai Kohei &jffs2_acl_default_xattr_handler, 900aa98d7cfSKaiGai Kohei #endif 901aa98d7cfSKaiGai Kohei &jffs2_trusted_xattr_handler, 902aa98d7cfSKaiGai Kohei NULL 903aa98d7cfSKaiGai Kohei }; 904aa98d7cfSKaiGai Kohei 905aa98d7cfSKaiGai Kohei static struct xattr_handler *xprefix_to_handler(int xprefix) { 906aa98d7cfSKaiGai Kohei struct xattr_handler *ret; 907aa98d7cfSKaiGai Kohei 908aa98d7cfSKaiGai Kohei switch (xprefix) { 909aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_USER: 910aa98d7cfSKaiGai Kohei ret = &jffs2_user_xattr_handler; 911aa98d7cfSKaiGai Kohei break; 912aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 913aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_SECURITY: 914aa98d7cfSKaiGai Kohei ret = &jffs2_security_xattr_handler; 915aa98d7cfSKaiGai Kohei break; 916aa98d7cfSKaiGai Kohei #endif 917aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 918aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_ACL_ACCESS: 919aa98d7cfSKaiGai Kohei ret = &jffs2_acl_access_xattr_handler; 920aa98d7cfSKaiGai Kohei break; 921aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_ACL_DEFAULT: 922aa98d7cfSKaiGai Kohei ret = &jffs2_acl_default_xattr_handler; 923aa98d7cfSKaiGai Kohei break; 924aa98d7cfSKaiGai Kohei #endif 925aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_TRUSTED: 926aa98d7cfSKaiGai Kohei ret = &jffs2_trusted_xattr_handler; 927aa98d7cfSKaiGai Kohei break; 928aa98d7cfSKaiGai Kohei default: 929aa98d7cfSKaiGai Kohei ret = NULL; 930aa98d7cfSKaiGai Kohei break; 931aa98d7cfSKaiGai Kohei } 932aa98d7cfSKaiGai Kohei return ret; 933aa98d7cfSKaiGai Kohei } 934aa98d7cfSKaiGai Kohei 935aa98d7cfSKaiGai Kohei ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size) 936aa98d7cfSKaiGai Kohei { 937aa98d7cfSKaiGai Kohei struct inode *inode = dentry->d_inode; 938aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 939aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 940aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 9418f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, **pref; 942aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 943aa98d7cfSKaiGai Kohei struct xattr_handler *xhandle; 944aa98d7cfSKaiGai Kohei ssize_t len, rc; 945aa98d7cfSKaiGai Kohei int retry = 0; 946aa98d7cfSKaiGai Kohei 9478f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 948aa98d7cfSKaiGai Kohei if (unlikely(rc)) 949aa98d7cfSKaiGai Kohei return rc; 950aa98d7cfSKaiGai Kohei 951aa98d7cfSKaiGai Kohei down_read(&c->xattr_sem); 952aa98d7cfSKaiGai Kohei retry: 953aa98d7cfSKaiGai Kohei len = 0; 9548f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 955aa98d7cfSKaiGai Kohei BUG_ON(ref->ic != ic); 956aa98d7cfSKaiGai Kohei xd = ref->xd; 957aa98d7cfSKaiGai Kohei if (!xd->xname) { 958aa98d7cfSKaiGai Kohei /* xdatum is unchached */ 959aa98d7cfSKaiGai Kohei if (!retry) { 960aa98d7cfSKaiGai Kohei retry = 1; 961aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 962aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 963aa98d7cfSKaiGai Kohei goto retry; 964aa98d7cfSKaiGai Kohei } else { 965aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 966aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 9678f2b6f49SKaiGai Kohei *pref = ref->next; 968aa98d7cfSKaiGai Kohei delete_xattr_ref(c, ref); 969aa98d7cfSKaiGai Kohei goto retry; 970aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 971aa98d7cfSKaiGai Kohei goto out; 972aa98d7cfSKaiGai Kohei } 973aa98d7cfSKaiGai Kohei } 974aa98d7cfSKaiGai Kohei xhandle = xprefix_to_handler(xd->xprefix); 975aa98d7cfSKaiGai Kohei if (!xhandle) 976aa98d7cfSKaiGai Kohei continue; 977aa98d7cfSKaiGai Kohei if (buffer) { 978aa98d7cfSKaiGai Kohei rc = xhandle->list(inode, buffer+len, size-len, xd->xname, xd->name_len); 979aa98d7cfSKaiGai Kohei } else { 980aa98d7cfSKaiGai Kohei rc = xhandle->list(inode, NULL, 0, xd->xname, xd->name_len); 981aa98d7cfSKaiGai Kohei } 982aa98d7cfSKaiGai Kohei if (rc < 0) 983aa98d7cfSKaiGai Kohei goto out; 984aa98d7cfSKaiGai Kohei len += rc; 985aa98d7cfSKaiGai Kohei } 986aa98d7cfSKaiGai Kohei rc = len; 987aa98d7cfSKaiGai Kohei out: 988aa98d7cfSKaiGai Kohei if (!retry) { 989aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 990aa98d7cfSKaiGai Kohei } else { 991aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 992aa98d7cfSKaiGai Kohei } 993aa98d7cfSKaiGai Kohei return rc; 994aa98d7cfSKaiGai Kohei } 995aa98d7cfSKaiGai Kohei 996aa98d7cfSKaiGai Kohei int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, 997aa98d7cfSKaiGai Kohei char *buffer, size_t size) 998aa98d7cfSKaiGai Kohei { 999aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 1000aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 1001aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 1002aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 10038f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, **pref; 1004aa98d7cfSKaiGai Kohei int rc, retry = 0; 1005aa98d7cfSKaiGai Kohei 10068f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 1007aa98d7cfSKaiGai Kohei if (unlikely(rc)) 1008aa98d7cfSKaiGai Kohei return rc; 1009aa98d7cfSKaiGai Kohei 1010aa98d7cfSKaiGai Kohei down_read(&c->xattr_sem); 1011aa98d7cfSKaiGai Kohei retry: 10128f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 1013aa98d7cfSKaiGai Kohei BUG_ON(ref->ic!=ic); 1014aa98d7cfSKaiGai Kohei 1015aa98d7cfSKaiGai Kohei xd = ref->xd; 1016aa98d7cfSKaiGai Kohei if (xd->xprefix != xprefix) 1017aa98d7cfSKaiGai Kohei continue; 1018aa98d7cfSKaiGai Kohei if (!xd->xname) { 1019aa98d7cfSKaiGai Kohei /* xdatum is unchached */ 1020aa98d7cfSKaiGai Kohei if (!retry) { 1021aa98d7cfSKaiGai Kohei retry = 1; 1022aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1023aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1024aa98d7cfSKaiGai Kohei goto retry; 1025aa98d7cfSKaiGai Kohei } else { 1026aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1027aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 10288f2b6f49SKaiGai Kohei *pref = ref->next; 1029aa98d7cfSKaiGai Kohei delete_xattr_ref(c, ref); 1030aa98d7cfSKaiGai Kohei goto retry; 1031aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) { 1032aa98d7cfSKaiGai Kohei goto out; 1033aa98d7cfSKaiGai Kohei } 1034aa98d7cfSKaiGai Kohei } 1035aa98d7cfSKaiGai Kohei } 1036aa98d7cfSKaiGai Kohei if (!strcmp(xname, xd->xname)) { 1037aa98d7cfSKaiGai Kohei rc = xd->value_len; 1038aa98d7cfSKaiGai Kohei if (buffer) { 1039aa98d7cfSKaiGai Kohei if (size < rc) { 1040aa98d7cfSKaiGai Kohei rc = -ERANGE; 1041aa98d7cfSKaiGai Kohei } else { 1042aa98d7cfSKaiGai Kohei memcpy(buffer, xd->xvalue, rc); 1043aa98d7cfSKaiGai Kohei } 1044aa98d7cfSKaiGai Kohei } 1045aa98d7cfSKaiGai Kohei goto out; 1046aa98d7cfSKaiGai Kohei } 1047aa98d7cfSKaiGai Kohei } 1048aa98d7cfSKaiGai Kohei rc = -ENODATA; 1049aa98d7cfSKaiGai Kohei out: 1050aa98d7cfSKaiGai Kohei if (!retry) { 1051aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1052aa98d7cfSKaiGai Kohei } else { 1053aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1054aa98d7cfSKaiGai Kohei } 1055aa98d7cfSKaiGai Kohei return rc; 1056aa98d7cfSKaiGai Kohei } 1057aa98d7cfSKaiGai Kohei 1058aa98d7cfSKaiGai Kohei int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, 1059aa98d7cfSKaiGai Kohei const char *buffer, size_t size, int flags) 1060aa98d7cfSKaiGai Kohei { 1061aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 1062aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 1063aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 1064aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 10658f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, *newref, **pref; 1066aa98d7cfSKaiGai Kohei uint32_t phys_ofs, length, request; 1067aa98d7cfSKaiGai Kohei int rc; 1068aa98d7cfSKaiGai Kohei 10698f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 1070aa98d7cfSKaiGai Kohei if (unlikely(rc)) 1071aa98d7cfSKaiGai Kohei return rc; 1072aa98d7cfSKaiGai Kohei 1073aa98d7cfSKaiGai Kohei request = PAD(sizeof(struct jffs2_raw_xattr) + strlen(xname) + 1 + size); 1074aa98d7cfSKaiGai Kohei rc = jffs2_reserve_space(c, request, &phys_ofs, &length, 1075aa98d7cfSKaiGai Kohei ALLOC_NORMAL, JFFS2_SUMMARY_XATTR_SIZE); 1076aa98d7cfSKaiGai Kohei if (rc) { 1077aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); 1078aa98d7cfSKaiGai Kohei return rc; 1079aa98d7cfSKaiGai Kohei } 1080aa98d7cfSKaiGai Kohei 1081aa98d7cfSKaiGai Kohei /* Find existing xattr */ 1082aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1083aa98d7cfSKaiGai Kohei retry: 10848f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 1085aa98d7cfSKaiGai Kohei xd = ref->xd; 1086aa98d7cfSKaiGai Kohei if (xd->xprefix != xprefix) 1087aa98d7cfSKaiGai Kohei continue; 1088aa98d7cfSKaiGai Kohei if (!xd->xname) { 1089aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1090aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 10918f2b6f49SKaiGai Kohei *pref = ref->next; 1092aa98d7cfSKaiGai Kohei delete_xattr_ref(c, ref); 1093aa98d7cfSKaiGai Kohei goto retry; 1094aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 1095aa98d7cfSKaiGai Kohei goto out; 1096aa98d7cfSKaiGai Kohei } 1097aa98d7cfSKaiGai Kohei if (!strcmp(xd->xname, xname)) { 1098aa98d7cfSKaiGai Kohei if (flags & XATTR_CREATE) { 1099aa98d7cfSKaiGai Kohei rc = -EEXIST; 1100aa98d7cfSKaiGai Kohei goto out; 1101aa98d7cfSKaiGai Kohei } 1102aa98d7cfSKaiGai Kohei if (!buffer) { 11038f2b6f49SKaiGai Kohei *pref = ref->next; 1104aa98d7cfSKaiGai Kohei delete_xattr_ref(c, ref); 1105aa98d7cfSKaiGai Kohei rc = 0; 1106aa98d7cfSKaiGai Kohei goto out; 1107aa98d7cfSKaiGai Kohei } 1108aa98d7cfSKaiGai Kohei goto found; 1109aa98d7cfSKaiGai Kohei } 1110aa98d7cfSKaiGai Kohei } 1111aa98d7cfSKaiGai Kohei /* not found */ 1112aa98d7cfSKaiGai Kohei if (flags & XATTR_REPLACE) { 1113aa98d7cfSKaiGai Kohei rc = -ENODATA; 1114aa98d7cfSKaiGai Kohei goto out; 1115aa98d7cfSKaiGai Kohei } 1116aa98d7cfSKaiGai Kohei if (!buffer) { 1117aa98d7cfSKaiGai Kohei rc = -EINVAL; 1118aa98d7cfSKaiGai Kohei goto out; 1119aa98d7cfSKaiGai Kohei } 1120aa98d7cfSKaiGai Kohei found: 1121aa98d7cfSKaiGai Kohei xd = create_xattr_datum(c, xprefix, xname, buffer, size, phys_ofs); 1122aa98d7cfSKaiGai Kohei if (IS_ERR(xd)) { 1123aa98d7cfSKaiGai Kohei rc = PTR_ERR(xd); 1124aa98d7cfSKaiGai Kohei goto out; 1125aa98d7cfSKaiGai Kohei } 1126aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1127aa98d7cfSKaiGai Kohei jffs2_complete_reservation(c); 1128aa98d7cfSKaiGai Kohei 1129aa98d7cfSKaiGai Kohei /* create xattr_ref */ 1130aa98d7cfSKaiGai Kohei request = PAD(sizeof(struct jffs2_raw_xref)); 1131aa98d7cfSKaiGai Kohei rc = jffs2_reserve_space(c, request, &phys_ofs, &length, 1132aa98d7cfSKaiGai Kohei ALLOC_NORMAL, JFFS2_SUMMARY_XREF_SIZE); 1133aa98d7cfSKaiGai Kohei if (rc) { 1134aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); 1135aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1136aa98d7cfSKaiGai Kohei xd->refcnt--; 1137aa98d7cfSKaiGai Kohei if (!xd->refcnt) 1138aa98d7cfSKaiGai Kohei delete_xattr_datum(c, xd); 1139aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1140aa98d7cfSKaiGai Kohei return rc; 1141aa98d7cfSKaiGai Kohei } 1142aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 11438f2b6f49SKaiGai Kohei if (ref) 11448f2b6f49SKaiGai Kohei *pref = ref->next; 1145aa98d7cfSKaiGai Kohei newref = create_xattr_ref(c, ic, xd, phys_ofs); 1146aa98d7cfSKaiGai Kohei if (IS_ERR(newref)) { 11478f2b6f49SKaiGai Kohei if (ref) { 11488f2b6f49SKaiGai Kohei ref->next = ic->xref; 11498f2b6f49SKaiGai Kohei ic->xref = ref; 11508f2b6f49SKaiGai Kohei } 1151aa98d7cfSKaiGai Kohei rc = PTR_ERR(newref); 1152aa98d7cfSKaiGai Kohei xd->refcnt--; 1153aa98d7cfSKaiGai Kohei if (!xd->refcnt) 1154aa98d7cfSKaiGai Kohei delete_xattr_datum(c, xd); 1155aa98d7cfSKaiGai Kohei } else if (ref) { 1156aa98d7cfSKaiGai Kohei delete_xattr_ref(c, ref); 1157aa98d7cfSKaiGai Kohei } 1158aa98d7cfSKaiGai Kohei out: 1159aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1160aa98d7cfSKaiGai Kohei jffs2_complete_reservation(c); 1161aa98d7cfSKaiGai Kohei return rc; 1162aa98d7cfSKaiGai Kohei } 1163aa98d7cfSKaiGai Kohei 1164aa98d7cfSKaiGai Kohei /* -------- garbage collector functions ------------- 1165aa98d7cfSKaiGai Kohei * jffs2_garbage_collect_xattr_datum(c, xd) 1166aa98d7cfSKaiGai Kohei * is used to move xdatum into new node. 1167aa98d7cfSKaiGai Kohei * jffs2_garbage_collect_xattr_ref(c, ref) 1168aa98d7cfSKaiGai Kohei * is used to move xref into new node. 1169aa98d7cfSKaiGai Kohei * jffs2_verify_xattr(c) 1170aa98d7cfSKaiGai Kohei * is used to call do_verify_xattr_datum() before garbage collecting. 1171aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 1172084702e0SKaiGai Kohei int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 1173aa98d7cfSKaiGai Kohei { 1174aa98d7cfSKaiGai Kohei uint32_t phys_ofs, totlen, length, old_ofs; 1175084702e0SKaiGai Kohei int rc = -EINVAL; 1176aa98d7cfSKaiGai Kohei 1177084702e0SKaiGai Kohei down_write(&c->xattr_sem); 1178aa98d7cfSKaiGai Kohei BUG_ON(!xd->node); 1179aa98d7cfSKaiGai Kohei 1180aa98d7cfSKaiGai Kohei old_ofs = ref_offset(xd->node); 1181aa98d7cfSKaiGai Kohei totlen = ref_totlen(c, c->gcblock, xd->node); 1182aa98d7cfSKaiGai Kohei if (totlen < sizeof(struct jffs2_raw_xattr)) 1183084702e0SKaiGai Kohei goto out; 1184aa98d7cfSKaiGai Kohei 1185aa98d7cfSKaiGai Kohei if (!xd->xname) { 1186aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1187aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 1188aa98d7cfSKaiGai Kohei delete_xattr_datum_node(c, xd); 1189084702e0SKaiGai Kohei rc = 0; 1190084702e0SKaiGai Kohei goto out; 1191aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 1192084702e0SKaiGai Kohei goto out; 1193aa98d7cfSKaiGai Kohei } 1194aa98d7cfSKaiGai Kohei rc = jffs2_reserve_space_gc(c, totlen, &phys_ofs, &length, JFFS2_SUMMARY_XATTR_SIZE); 1195aa98d7cfSKaiGai Kohei if (rc || length < totlen) { 1196aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, totlen); 1197084702e0SKaiGai Kohei rc = rc ? rc : -EBADFD; 1198084702e0SKaiGai Kohei goto out; 1199aa98d7cfSKaiGai Kohei } 1200aa98d7cfSKaiGai Kohei rc = save_xattr_datum(c, xd, phys_ofs); 1201aa98d7cfSKaiGai Kohei if (!rc) 1202aa98d7cfSKaiGai Kohei dbg_xattr("xdatum (xid=%u, version=%u) GC'ed from %#08x to %08x\n", 1203aa98d7cfSKaiGai Kohei xd->xid, xd->version, old_ofs, ref_offset(xd->node)); 1204084702e0SKaiGai Kohei out: 1205084702e0SKaiGai Kohei up_write(&c->xattr_sem); 1206aa98d7cfSKaiGai Kohei return rc; 1207aa98d7cfSKaiGai Kohei } 1208aa98d7cfSKaiGai Kohei 1209aa98d7cfSKaiGai Kohei 1210084702e0SKaiGai Kohei int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 1211aa98d7cfSKaiGai Kohei { 1212aa98d7cfSKaiGai Kohei uint32_t phys_ofs, totlen, length, old_ofs; 1213084702e0SKaiGai Kohei int rc = -EINVAL; 1214aa98d7cfSKaiGai Kohei 1215084702e0SKaiGai Kohei down_write(&c->xattr_sem); 1216aa98d7cfSKaiGai Kohei BUG_ON(!ref->node); 1217aa98d7cfSKaiGai Kohei 1218aa98d7cfSKaiGai Kohei old_ofs = ref_offset(ref->node); 1219aa98d7cfSKaiGai Kohei totlen = ref_totlen(c, c->gcblock, ref->node); 1220aa98d7cfSKaiGai Kohei if (totlen != sizeof(struct jffs2_raw_xref)) 1221084702e0SKaiGai Kohei goto out; 1222084702e0SKaiGai Kohei 1223aa98d7cfSKaiGai Kohei rc = jffs2_reserve_space_gc(c, totlen, &phys_ofs, &length, JFFS2_SUMMARY_XREF_SIZE); 1224aa98d7cfSKaiGai Kohei if (rc || length < totlen) { 1225aa98d7cfSKaiGai Kohei JFFS2_WARNING("%s: jffs2_reserve_space() = %d, request = %u\n", 1226aa98d7cfSKaiGai Kohei __FUNCTION__, rc, totlen); 1227084702e0SKaiGai Kohei rc = rc ? rc : -EBADFD; 1228084702e0SKaiGai Kohei goto out; 1229aa98d7cfSKaiGai Kohei } 1230aa98d7cfSKaiGai Kohei rc = save_xattr_ref(c, ref, phys_ofs); 1231aa98d7cfSKaiGai Kohei if (!rc) 1232aa98d7cfSKaiGai Kohei dbg_xattr("xref (ino=%u, xid=%u) GC'ed from %#08x to %08x\n", 1233aa98d7cfSKaiGai Kohei ref->ic->ino, ref->xd->xid, old_ofs, ref_offset(ref->node)); 1234084702e0SKaiGai Kohei out: 1235084702e0SKaiGai Kohei up_write(&c->xattr_sem); 1236aa98d7cfSKaiGai Kohei return rc; 1237aa98d7cfSKaiGai Kohei } 1238aa98d7cfSKaiGai Kohei 1239aa98d7cfSKaiGai Kohei int jffs2_verify_xattr(struct jffs2_sb_info *c) 1240aa98d7cfSKaiGai Kohei { 1241aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 1242aa98d7cfSKaiGai Kohei int rc; 1243aa98d7cfSKaiGai Kohei 1244aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1245aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) { 1246aa98d7cfSKaiGai Kohei rc = do_verify_xattr_datum(c, xd); 1247aa98d7cfSKaiGai Kohei if (rc == 0) { 1248aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 1249aa98d7cfSKaiGai Kohei break; 1250aa98d7cfSKaiGai Kohei } else if (rc > 0) { 1251aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 1252aa98d7cfSKaiGai Kohei delete_xattr_datum_node(c, xd); 1253aa98d7cfSKaiGai Kohei } 1254aa98d7cfSKaiGai Kohei } 1255aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1256aa98d7cfSKaiGai Kohei 1257aa98d7cfSKaiGai Kohei return list_empty(&c->xattr_unchecked) ? 1 : 0; 1258aa98d7cfSKaiGai Kohei } 1259