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). 26c9f700f8SKaiGai Kohei * is_xattr_datum_unchecked(c, xd) 27c9f700f8SKaiGai Kohei * returns 1, if xdatum contains any unchecked raw nodes. if all raw nodes are not 28c9f700f8SKaiGai Kohei * unchecked, it returns 0. 29aa98d7cfSKaiGai Kohei * unload_xattr_datum(c, xd) 30aa98d7cfSKaiGai Kohei * is used to release xattr name/value pair and detach from c->xattrindex. 31aa98d7cfSKaiGai Kohei * reclaim_xattr_datum(c) 32aa98d7cfSKaiGai Kohei * is used to reclaim xattr name/value pairs on the xattr name/value pair cache when 33aa98d7cfSKaiGai Kohei * memory usage by cache is over c->xdatum_mem_threshold. Currentry, this threshold 34aa98d7cfSKaiGai Kohei * is hard coded as 32KiB. 35aa98d7cfSKaiGai Kohei * do_verify_xattr_datum(c, xd) 36aa98d7cfSKaiGai Kohei * is used to load the xdatum informations without name/value pair from the medium. 37aa98d7cfSKaiGai Kohei * It's necessary once, because those informations are not collected during mounting 38aa98d7cfSKaiGai Kohei * process when EBS is enabled. 39aa98d7cfSKaiGai Kohei * 0 will be returned, if success. An negative return value means recoverable error, and 40aa98d7cfSKaiGai Kohei * positive return value means unrecoverable error. Thus, caller must remove this xdatum 41aa98d7cfSKaiGai Kohei * and xref when it returned positive value. 42aa98d7cfSKaiGai Kohei * do_load_xattr_datum(c, xd) 43aa98d7cfSKaiGai Kohei * is used to load name/value pair from the medium. 44aa98d7cfSKaiGai Kohei * The meanings of return value is same as do_verify_xattr_datum(). 45aa98d7cfSKaiGai Kohei * load_xattr_datum(c, xd) 46aa98d7cfSKaiGai Kohei * is used to be as a wrapper of do_verify_xattr_datum() and do_load_xattr_datum(). 47aa98d7cfSKaiGai Kohei * If xd need to call do_verify_xattr_datum() at first, it's called before calling 48aa98d7cfSKaiGai Kohei * do_load_xattr_datum(). The meanings of return value is same as do_verify_xattr_datum(). 499fe4854cSDavid Woodhouse * save_xattr_datum(c, xd) 50aa98d7cfSKaiGai Kohei * is used to write xdatum to medium. xd->version will be incremented. 519fe4854cSDavid Woodhouse * create_xattr_datum(c, xprefix, xname, xvalue, xsize) 52aa98d7cfSKaiGai Kohei * is used to create new xdatum and write to medium. 53c9f700f8SKaiGai Kohei * delete_xattr_datum_delay(c, xd) 54c9f700f8SKaiGai Kohei * is used to delete a xdatum without 'delete marker'. It has a possibility to detect 55c9f700f8SKaiGai Kohei * orphan xdatum on next mounting. 56c9f700f8SKaiGai Kohei * delete_xattr_datum(c, xd) 57c9f700f8SKaiGai Kohei * is used to delete a xdatum with 'delete marker'. Calling jffs2_reserve_space() is 58c9f700f8SKaiGai Kohei * necessary before this function. 59aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 60aa98d7cfSKaiGai Kohei static uint32_t xattr_datum_hashkey(int xprefix, const char *xname, const char *xvalue, int xsize) 61aa98d7cfSKaiGai Kohei { 62aa98d7cfSKaiGai Kohei int name_len = strlen(xname); 63aa98d7cfSKaiGai Kohei 64aa98d7cfSKaiGai Kohei return crc32(xprefix, xname, name_len) ^ crc32(xprefix, xvalue, xsize); 65aa98d7cfSKaiGai Kohei } 66aa98d7cfSKaiGai Kohei 67c9f700f8SKaiGai Kohei static int is_xattr_datum_unchecked(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 68c9f700f8SKaiGai Kohei { 69c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 70c9f700f8SKaiGai Kohei int rc = 0; 71c9f700f8SKaiGai Kohei 72c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 73c9f700f8SKaiGai Kohei for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { 74c9f700f8SKaiGai Kohei if (ref_flags(raw) == REF_UNCHECKED) { 75c9f700f8SKaiGai Kohei rc = 1; 76c9f700f8SKaiGai Kohei break; 77c9f700f8SKaiGai Kohei } 78c9f700f8SKaiGai Kohei } 79c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 80c9f700f8SKaiGai Kohei return rc; 81c9f700f8SKaiGai Kohei } 82c9f700f8SKaiGai Kohei 83aa98d7cfSKaiGai Kohei static void unload_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 84aa98d7cfSKaiGai Kohei { 85aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 86aa98d7cfSKaiGai Kohei D1(dbg_xattr("%s: xid=%u, version=%u\n", __FUNCTION__, xd->xid, xd->version)); 87aa98d7cfSKaiGai Kohei if (xd->xname) { 88aa98d7cfSKaiGai Kohei c->xdatum_mem_usage -= (xd->name_len + 1 + xd->value_len); 89aa98d7cfSKaiGai Kohei kfree(xd->xname); 90aa98d7cfSKaiGai Kohei } 91aa98d7cfSKaiGai Kohei 92aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 93aa98d7cfSKaiGai Kohei xd->hashkey = 0; 94aa98d7cfSKaiGai Kohei xd->xname = NULL; 95aa98d7cfSKaiGai Kohei xd->xvalue = NULL; 96aa98d7cfSKaiGai Kohei } 97aa98d7cfSKaiGai Kohei 98aa98d7cfSKaiGai Kohei static void reclaim_xattr_datum(struct jffs2_sb_info *c) 99aa98d7cfSKaiGai Kohei { 100aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 101aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 102aa98d7cfSKaiGai Kohei uint32_t target, before; 103aa98d7cfSKaiGai Kohei static int index = 0; 104aa98d7cfSKaiGai Kohei int count; 105aa98d7cfSKaiGai Kohei 106aa98d7cfSKaiGai Kohei if (c->xdatum_mem_threshold > c->xdatum_mem_usage) 107aa98d7cfSKaiGai Kohei return; 108aa98d7cfSKaiGai Kohei 109aa98d7cfSKaiGai Kohei before = c->xdatum_mem_usage; 110aa98d7cfSKaiGai Kohei target = c->xdatum_mem_usage * 4 / 5; /* 20% reduction */ 111aa98d7cfSKaiGai Kohei for (count = 0; count < XATTRINDEX_HASHSIZE; count++) { 112aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[index], xindex) { 113aa98d7cfSKaiGai Kohei if (xd->flags & JFFS2_XFLAGS_HOT) { 114aa98d7cfSKaiGai Kohei xd->flags &= ~JFFS2_XFLAGS_HOT; 115aa98d7cfSKaiGai Kohei } else if (!(xd->flags & JFFS2_XFLAGS_BIND)) { 116aa98d7cfSKaiGai Kohei unload_xattr_datum(c, xd); 117aa98d7cfSKaiGai Kohei } 118aa98d7cfSKaiGai Kohei if (c->xdatum_mem_usage <= target) 119aa98d7cfSKaiGai Kohei goto out; 120aa98d7cfSKaiGai Kohei } 121aa98d7cfSKaiGai Kohei index = (index+1) % XATTRINDEX_HASHSIZE; 122aa98d7cfSKaiGai Kohei } 123aa98d7cfSKaiGai Kohei out: 124aa98d7cfSKaiGai Kohei JFFS2_NOTICE("xdatum_mem_usage from %u byte to %u byte (%u byte reclaimed)\n", 125aa98d7cfSKaiGai Kohei before, c->xdatum_mem_usage, before - c->xdatum_mem_usage); 126aa98d7cfSKaiGai Kohei } 127aa98d7cfSKaiGai Kohei 128aa98d7cfSKaiGai Kohei static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 129aa98d7cfSKaiGai Kohei { 130aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 131aa98d7cfSKaiGai Kohei struct jffs2_eraseblock *jeb; 132c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 133aa98d7cfSKaiGai Kohei struct jffs2_raw_xattr rx; 134aa98d7cfSKaiGai Kohei size_t readlen; 135c9f700f8SKaiGai Kohei uint32_t crc, offset, totlen; 136aa98d7cfSKaiGai Kohei int rc; 137aa98d7cfSKaiGai Kohei 138c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 139c9f700f8SKaiGai Kohei offset = ref_offset(xd->node); 140c9f700f8SKaiGai Kohei if (ref_flags(xd->node) == REF_PRISTINE) 141c9f700f8SKaiGai Kohei goto complete; 142c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 143aa98d7cfSKaiGai Kohei 144c9f700f8SKaiGai Kohei rc = jffs2_flash_read(c, offset, sizeof(rx), &readlen, (char *)&rx); 145aa98d7cfSKaiGai Kohei if (rc || readlen != sizeof(rx)) { 14689291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu at %#08x\n", 147c9f700f8SKaiGai Kohei rc, sizeof(rx), readlen, offset); 148aa98d7cfSKaiGai Kohei return rc ? rc : -EIO; 149aa98d7cfSKaiGai Kohei } 150aa98d7cfSKaiGai Kohei crc = crc32(0, &rx, sizeof(rx) - 4); 151aa98d7cfSKaiGai Kohei if (crc != je32_to_cpu(rx.node_crc)) { 152aa98d7cfSKaiGai Kohei JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", 153c9f700f8SKaiGai Kohei offset, je32_to_cpu(rx.hdr_crc), crc); 154c9f700f8SKaiGai Kohei xd->flags |= JFFS2_XFLAGS_INVALID; 155aa98d7cfSKaiGai Kohei return EIO; 156aa98d7cfSKaiGai Kohei } 157c9f700f8SKaiGai Kohei totlen = sizeof(rx); 158c9f700f8SKaiGai Kohei if (xd->version != XDATUM_DELETE_MARKER) 159c9f700f8SKaiGai Kohei totlen += rx.name_len + 1 + je16_to_cpu(rx.value_len); 160c9f700f8SKaiGai Kohei totlen = PAD(totlen); 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; 174aa98d7cfSKaiGai Kohei return EIO; 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) { 232aa98d7cfSKaiGai Kohei JFFS2_WARNING("node CRC failed (JFFS2_NODETYPE_XREF)" 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; 237aa98d7cfSKaiGai Kohei return EIO; 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 271c9f700f8SKaiGai Kohei if (xd->xname) 272c9f700f8SKaiGai Kohei return 0; 273c9f700f8SKaiGai Kohei if (xd->flags & JFFS2_XFLAGS_INVALID) 274aa98d7cfSKaiGai Kohei return EIO; 275c9f700f8SKaiGai Kohei if (unlikely(is_xattr_datum_unchecked(c, xd))) 276aa98d7cfSKaiGai Kohei rc = do_verify_xattr_datum(c, xd); 277aa98d7cfSKaiGai Kohei if (!rc) 278aa98d7cfSKaiGai Kohei rc = do_load_xattr_datum(c, xd); 279aa98d7cfSKaiGai Kohei return rc; 280aa98d7cfSKaiGai Kohei } 281aa98d7cfSKaiGai Kohei 2829fe4854cSDavid Woodhouse static int save_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 283aa98d7cfSKaiGai Kohei { 284aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 2852f785402SDavid Woodhouse struct jffs2_raw_xattr rx; 286aa98d7cfSKaiGai Kohei struct kvec vecs[2]; 28789291a9dSDavid Woodhouse size_t length; 288c9f700f8SKaiGai Kohei int rc, totlen, nvecs = 1; 2899fe4854cSDavid Woodhouse uint32_t phys_ofs = write_ofs(c); 290aa98d7cfSKaiGai Kohei 291c9f700f8SKaiGai Kohei BUG_ON(is_xattr_datum_dead(xd) || (xd->flags & JFFS2_XFLAGS_INVALID) 292c9f700f8SKaiGai Kohei ? !!xd->xname : !xd->xname); 293aa98d7cfSKaiGai Kohei 294aa98d7cfSKaiGai Kohei vecs[0].iov_base = ℞ 295c9f700f8SKaiGai Kohei vecs[0].iov_len = totlen = sizeof(rx); 296c9f700f8SKaiGai Kohei if (!is_xattr_datum_dead(xd) && !(xd->flags & JFFS2_XFLAGS_INVALID)) { 297c9f700f8SKaiGai Kohei nvecs++; 298aa98d7cfSKaiGai Kohei vecs[1].iov_base = xd->xname; 299aa98d7cfSKaiGai Kohei vecs[1].iov_len = xd->name_len + 1 + xd->value_len; 300c9f700f8SKaiGai Kohei totlen += vecs[1].iov_len; 301c9f700f8SKaiGai Kohei } 302aa98d7cfSKaiGai Kohei /* Setup raw-xattr */ 303c9f700f8SKaiGai Kohei memset(&rx, 0, sizeof(rx)); 304aa98d7cfSKaiGai Kohei rx.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 305aa98d7cfSKaiGai Kohei rx.nodetype = cpu_to_je16(JFFS2_NODETYPE_XATTR); 306aa98d7cfSKaiGai Kohei rx.totlen = cpu_to_je32(PAD(totlen)); 307aa98d7cfSKaiGai Kohei rx.hdr_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_unknown_node) - 4)); 308aa98d7cfSKaiGai Kohei 309aa98d7cfSKaiGai Kohei rx.xid = cpu_to_je32(xd->xid); 310c9f700f8SKaiGai Kohei if (!is_xattr_datum_dead(xd) && !(xd->flags & JFFS2_XFLAGS_INVALID)) { 311aa98d7cfSKaiGai Kohei rx.version = cpu_to_je32(++xd->version); 312aa98d7cfSKaiGai Kohei rx.xprefix = xd->xprefix; 313aa98d7cfSKaiGai Kohei rx.name_len = xd->name_len; 314aa98d7cfSKaiGai Kohei rx.value_len = cpu_to_je16(xd->value_len); 315aa98d7cfSKaiGai Kohei rx.data_crc = cpu_to_je32(crc32(0, vecs[1].iov_base, vecs[1].iov_len)); 316c9f700f8SKaiGai Kohei } else { 317c9f700f8SKaiGai Kohei rx.version = cpu_to_je32(XDATUM_DELETE_MARKER); 318c9f700f8SKaiGai Kohei } 319aa98d7cfSKaiGai Kohei rx.node_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_raw_xattr) - 4)); 320aa98d7cfSKaiGai Kohei 321c9f700f8SKaiGai Kohei rc = jffs2_flash_writev(c, vecs, nvecs, phys_ofs, &length, 0); 322aa98d7cfSKaiGai Kohei if (rc || totlen != length) { 32389291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_writev()=%d, req=%u, wrote=%zu, at %#08x\n", 324aa98d7cfSKaiGai Kohei rc, totlen, length, phys_ofs); 325aa98d7cfSKaiGai Kohei rc = rc ? rc : -EIO; 3262f785402SDavid Woodhouse if (length) 3272f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(totlen), NULL); 3282f785402SDavid Woodhouse 329aa98d7cfSKaiGai Kohei return rc; 330aa98d7cfSKaiGai Kohei } 331aa98d7cfSKaiGai Kohei /* success */ 332c9f700f8SKaiGai Kohei jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(totlen), (void *)xd); 333aa98d7cfSKaiGai Kohei 334aa98d7cfSKaiGai Kohei dbg_xattr("success on saving xdatum (xid=%u, version=%u, xprefix=%u, xname='%s')\n", 335aa98d7cfSKaiGai Kohei xd->xid, xd->version, xd->xprefix, xd->xname); 336aa98d7cfSKaiGai Kohei 337aa98d7cfSKaiGai Kohei return 0; 338aa98d7cfSKaiGai Kohei } 339aa98d7cfSKaiGai Kohei 340aa98d7cfSKaiGai Kohei static struct jffs2_xattr_datum *create_xattr_datum(struct jffs2_sb_info *c, 341aa98d7cfSKaiGai Kohei int xprefix, const char *xname, 3429fe4854cSDavid Woodhouse const char *xvalue, int xsize) 343aa98d7cfSKaiGai Kohei { 344aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 345aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 346aa98d7cfSKaiGai Kohei uint32_t hashkey, name_len; 347aa98d7cfSKaiGai Kohei char *data; 348aa98d7cfSKaiGai Kohei int i, rc; 349aa98d7cfSKaiGai Kohei 350aa98d7cfSKaiGai Kohei /* Search xattr_datum has same xname/xvalue by index */ 351aa98d7cfSKaiGai Kohei hashkey = xattr_datum_hashkey(xprefix, xname, xvalue, xsize); 352aa98d7cfSKaiGai Kohei i = hashkey % XATTRINDEX_HASHSIZE; 353aa98d7cfSKaiGai Kohei list_for_each_entry(xd, &c->xattrindex[i], xindex) { 354aa98d7cfSKaiGai Kohei if (xd->hashkey==hashkey 355aa98d7cfSKaiGai Kohei && xd->xprefix==xprefix 356aa98d7cfSKaiGai Kohei && xd->value_len==xsize 357aa98d7cfSKaiGai Kohei && !strcmp(xd->xname, xname) 358aa98d7cfSKaiGai Kohei && !memcmp(xd->xvalue, xvalue, xsize)) { 359aa98d7cfSKaiGai Kohei xd->refcnt++; 360aa98d7cfSKaiGai Kohei return xd; 361aa98d7cfSKaiGai Kohei } 362aa98d7cfSKaiGai Kohei } 363aa98d7cfSKaiGai Kohei 364aa98d7cfSKaiGai Kohei /* Not found, Create NEW XATTR-Cache */ 365aa98d7cfSKaiGai Kohei name_len = strlen(xname); 366aa98d7cfSKaiGai Kohei 367aa98d7cfSKaiGai Kohei xd = jffs2_alloc_xattr_datum(); 368aa98d7cfSKaiGai Kohei if (!xd) 369aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 370aa98d7cfSKaiGai Kohei 371aa98d7cfSKaiGai Kohei data = kmalloc(name_len + 1 + xsize, GFP_KERNEL); 372aa98d7cfSKaiGai Kohei if (!data) { 373aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 374aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 375aa98d7cfSKaiGai Kohei } 376aa98d7cfSKaiGai Kohei strcpy(data, xname); 377aa98d7cfSKaiGai Kohei memcpy(data + name_len + 1, xvalue, xsize); 378aa98d7cfSKaiGai Kohei 379aa98d7cfSKaiGai Kohei xd->refcnt = 1; 380aa98d7cfSKaiGai Kohei xd->xid = ++c->highest_xid; 381aa98d7cfSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_HOT; 382aa98d7cfSKaiGai Kohei xd->xprefix = xprefix; 383aa98d7cfSKaiGai Kohei 384aa98d7cfSKaiGai Kohei xd->hashkey = hashkey; 385aa98d7cfSKaiGai Kohei xd->xname = data; 386aa98d7cfSKaiGai Kohei xd->xvalue = data + name_len + 1; 387aa98d7cfSKaiGai Kohei xd->name_len = name_len; 388aa98d7cfSKaiGai Kohei xd->value_len = xsize; 389aa98d7cfSKaiGai Kohei xd->data_crc = crc32(0, data, xd->name_len + 1 + xd->value_len); 390aa98d7cfSKaiGai Kohei 3919fe4854cSDavid Woodhouse rc = save_xattr_datum(c, xd); 392aa98d7cfSKaiGai Kohei if (rc) { 393aa98d7cfSKaiGai Kohei kfree(xd->xname); 394aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 395aa98d7cfSKaiGai Kohei return ERR_PTR(rc); 396aa98d7cfSKaiGai Kohei } 397aa98d7cfSKaiGai Kohei 398aa98d7cfSKaiGai Kohei /* Insert Hash Index */ 399aa98d7cfSKaiGai Kohei i = hashkey % XATTRINDEX_HASHSIZE; 400aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattrindex[i]); 401aa98d7cfSKaiGai Kohei 402aa98d7cfSKaiGai Kohei c->xdatum_mem_usage += (xd->name_len + 1 + xd->value_len); 403aa98d7cfSKaiGai Kohei reclaim_xattr_datum(c); 404aa98d7cfSKaiGai Kohei 405aa98d7cfSKaiGai Kohei return xd; 406aa98d7cfSKaiGai Kohei } 407aa98d7cfSKaiGai Kohei 408c9f700f8SKaiGai Kohei static void delete_xattr_datum_delay(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 409c9f700f8SKaiGai Kohei { 410c9f700f8SKaiGai Kohei /* must be called under down_write(xattr_sem) */ 411c9f700f8SKaiGai Kohei BUG_ON(xd->refcnt); 412c9f700f8SKaiGai Kohei 413c9f700f8SKaiGai Kohei unload_xattr_datum(c, xd); 414c9f700f8SKaiGai Kohei set_xattr_datum_dead(xd); 415c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 416c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_dead_list); 417c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 418c9f700f8SKaiGai Kohei JFFS2_NOTICE("xdatum(xid=%u) was removed without delete marker. " 419c9f700f8SKaiGai Kohei "An orphan xdatum may be detected on next mounting.\n", xd->xid); 420c9f700f8SKaiGai Kohei } 421c9f700f8SKaiGai Kohei 422c9f700f8SKaiGai Kohei static void delete_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 423c9f700f8SKaiGai Kohei { 424c9f700f8SKaiGai Kohei /* must be called under jffs2_reserve_space() and down_write(xattr_sem) */ 425c9f700f8SKaiGai Kohei int rc; 426c9f700f8SKaiGai Kohei BUG_ON(xd->refcnt); 427c9f700f8SKaiGai Kohei 428c9f700f8SKaiGai Kohei unload_xattr_datum(c, xd); 429c9f700f8SKaiGai Kohei set_xattr_datum_dead(xd); 430c9f700f8SKaiGai Kohei rc = save_xattr_datum(c, xd); 431c9f700f8SKaiGai Kohei if (rc) { 432c9f700f8SKaiGai Kohei JFFS2_NOTICE("xdatum(xid=%u) was removed without delete marker. " 433c9f700f8SKaiGai Kohei "An orphan xdatum may be detected on next mounting.\n", 434c9f700f8SKaiGai Kohei xd->xid); 435c9f700f8SKaiGai Kohei } 436c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 437c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_dead_list); 438c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 439c9f700f8SKaiGai Kohei } 440c9f700f8SKaiGai Kohei 44121b9879bSKaiGai Kohei /* -------- xref related functions ------------------ 442aa98d7cfSKaiGai Kohei * verify_xattr_ref(c, ref) 443aa98d7cfSKaiGai Kohei * is used to load xref information from medium. Because summary data does not 444aa98d7cfSKaiGai Kohei * contain xid/ino, it's necessary to verify once while mounting process. 445aa98d7cfSKaiGai Kohei * delete_xattr_ref_node(c, ref) 446aa98d7cfSKaiGai Kohei * is used to delete a jffs2 node is dominated by xref. When EBS is enabled, 447aa98d7cfSKaiGai Kohei * it overwrites the obsolete node by myself. 448aa98d7cfSKaiGai Kohei * delete_xattr_ref(c, ref) 449aa98d7cfSKaiGai Kohei * is used to delete jffs2_xattr_ref object. If the reference counter of xdatum 450aa98d7cfSKaiGai Kohei * is refered by this xref become 0, delete_xattr_datum() is called later. 4519fe4854cSDavid Woodhouse * save_xattr_ref(c, ref) 452aa98d7cfSKaiGai Kohei * is used to write xref to medium. 4539fe4854cSDavid Woodhouse * create_xattr_ref(c, ic, xd) 454aa98d7cfSKaiGai Kohei * is used to create a new xref and write to medium. 455aa98d7cfSKaiGai Kohei * jffs2_xattr_delete_inode(c, ic) 456aa98d7cfSKaiGai Kohei * is called to remove xrefs related to obsolete inode when inode is unlinked. 457aa98d7cfSKaiGai Kohei * jffs2_xattr_free_inode(c, ic) 458aa98d7cfSKaiGai Kohei * is called to release xattr related objects when unmounting. 4598f2b6f49SKaiGai Kohei * check_xattr_ref_inode(c, ic) 460aa98d7cfSKaiGai Kohei * is used to confirm inode does not have duplicate xattr name/value pair. 461aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 462aa98d7cfSKaiGai Kohei static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 463aa98d7cfSKaiGai Kohei { 464aa98d7cfSKaiGai Kohei struct jffs2_eraseblock *jeb; 465c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 466aa98d7cfSKaiGai Kohei struct jffs2_raw_xref rr; 467aa98d7cfSKaiGai Kohei size_t readlen; 468c9f700f8SKaiGai Kohei uint32_t crc, offset, totlen; 469aa98d7cfSKaiGai Kohei int rc; 470aa98d7cfSKaiGai Kohei 471c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 472c9f700f8SKaiGai Kohei if (ref_flags(ref->node) != REF_UNCHECKED) 473c9f700f8SKaiGai Kohei goto complete; 474c9f700f8SKaiGai Kohei offset = ref_offset(ref->node); 475c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 476aa98d7cfSKaiGai Kohei 477c9f700f8SKaiGai Kohei rc = jffs2_flash_read(c, offset, sizeof(rr), &readlen, (char *)&rr); 478aa98d7cfSKaiGai Kohei if (rc || sizeof(rr) != readlen) { 47989291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu, at %#08x\n", 480c9f700f8SKaiGai Kohei rc, sizeof(rr), readlen, offset); 481aa98d7cfSKaiGai Kohei return rc ? rc : -EIO; 482aa98d7cfSKaiGai Kohei } 483aa98d7cfSKaiGai Kohei /* obsolete node */ 484aa98d7cfSKaiGai Kohei crc = crc32(0, &rr, sizeof(rr) - 4); 485aa98d7cfSKaiGai Kohei if (crc != je32_to_cpu(rr.node_crc)) { 486aa98d7cfSKaiGai Kohei JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", 487c9f700f8SKaiGai Kohei offset, je32_to_cpu(rr.node_crc), crc); 488aa98d7cfSKaiGai Kohei return EIO; 489aa98d7cfSKaiGai Kohei } 490aa98d7cfSKaiGai Kohei if (je16_to_cpu(rr.magic) != JFFS2_MAGIC_BITMASK 491aa98d7cfSKaiGai Kohei || je16_to_cpu(rr.nodetype) != JFFS2_NODETYPE_XREF 492aa98d7cfSKaiGai Kohei || je32_to_cpu(rr.totlen) != PAD(sizeof(rr))) { 493aa98d7cfSKaiGai Kohei JFFS2_ERROR("inconsistent xref at %#08x, magic=%#04x/%#04x, " 49489291a9dSDavid Woodhouse "nodetype=%#04x/%#04x, totlen=%u/%zu\n", 495c9f700f8SKaiGai Kohei offset, je16_to_cpu(rr.magic), JFFS2_MAGIC_BITMASK, 496aa98d7cfSKaiGai Kohei je16_to_cpu(rr.nodetype), JFFS2_NODETYPE_XREF, 497aa98d7cfSKaiGai Kohei je32_to_cpu(rr.totlen), PAD(sizeof(rr))); 498aa98d7cfSKaiGai Kohei return EIO; 499aa98d7cfSKaiGai Kohei } 500aa98d7cfSKaiGai Kohei ref->ino = je32_to_cpu(rr.ino); 501aa98d7cfSKaiGai Kohei ref->xid = je32_to_cpu(rr.xid); 502c9f700f8SKaiGai Kohei ref->xseqno = je32_to_cpu(rr.xseqno); 503c9f700f8SKaiGai Kohei if (ref->xseqno > c->highest_xseqno) 504c9f700f8SKaiGai Kohei c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER); 505aa98d7cfSKaiGai Kohei 506aa98d7cfSKaiGai Kohei spin_lock(&c->erase_completion_lock); 507c9f700f8SKaiGai Kohei complete: 508c9f700f8SKaiGai Kohei for (raw=ref->node; raw != (void *)ref; raw=raw->next_in_ino) { 509c9f700f8SKaiGai Kohei jeb = &c->blocks[ref_offset(raw) / c->sector_size]; 510c9f700f8SKaiGai Kohei totlen = PAD(ref_totlen(c, jeb, raw)); 511c9f700f8SKaiGai Kohei if (ref_flags(raw) == REF_UNCHECKED) { 512aa98d7cfSKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 513aa98d7cfSKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 514c9f700f8SKaiGai Kohei } 515c9f700f8SKaiGai Kohei raw->flash_offset = ref_offset(raw) | ((ref->node==raw) ? REF_PRISTINE : REF_NORMAL); 516c9f700f8SKaiGai Kohei } 517aa98d7cfSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 518aa98d7cfSKaiGai Kohei 519aa98d7cfSKaiGai Kohei dbg_xattr("success on verifying xref (ino=%u, xid=%u) at %#08x\n", 520aa98d7cfSKaiGai Kohei ref->ino, ref->xid, ref_offset(ref->node)); 521aa98d7cfSKaiGai Kohei return 0; 522aa98d7cfSKaiGai Kohei } 523aa98d7cfSKaiGai Kohei 5249fe4854cSDavid Woodhouse static int save_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 525aa98d7cfSKaiGai Kohei { 526aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 527aa98d7cfSKaiGai Kohei struct jffs2_raw_xref rr; 52889291a9dSDavid Woodhouse size_t length; 529c9f700f8SKaiGai Kohei uint32_t xseqno, phys_ofs = write_ofs(c); 530aa98d7cfSKaiGai Kohei int ret; 531aa98d7cfSKaiGai Kohei 532aa98d7cfSKaiGai Kohei rr.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 533aa98d7cfSKaiGai Kohei rr.nodetype = cpu_to_je16(JFFS2_NODETYPE_XREF); 534aa98d7cfSKaiGai Kohei rr.totlen = cpu_to_je32(PAD(sizeof(rr))); 535aa98d7cfSKaiGai Kohei rr.hdr_crc = cpu_to_je32(crc32(0, &rr, sizeof(struct jffs2_unknown_node) - 4)); 536aa98d7cfSKaiGai Kohei 537c9f700f8SKaiGai Kohei xseqno = (c->highest_xseqno += 2); 538c9f700f8SKaiGai Kohei if (is_xattr_ref_dead(ref)) { 539c9f700f8SKaiGai Kohei xseqno |= XREF_DELETE_MARKER; 540c9f700f8SKaiGai Kohei rr.ino = cpu_to_je32(ref->ino); 541c9f700f8SKaiGai Kohei rr.xid = cpu_to_je32(ref->xid); 542c9f700f8SKaiGai Kohei } else { 543aa98d7cfSKaiGai Kohei rr.ino = cpu_to_je32(ref->ic->ino); 544aa98d7cfSKaiGai Kohei rr.xid = cpu_to_je32(ref->xd->xid); 545c9f700f8SKaiGai Kohei } 546c9f700f8SKaiGai Kohei rr.xseqno = cpu_to_je32(xseqno); 547aa98d7cfSKaiGai Kohei rr.node_crc = cpu_to_je32(crc32(0, &rr, sizeof(rr) - 4)); 548aa98d7cfSKaiGai Kohei 549aa98d7cfSKaiGai Kohei ret = jffs2_flash_write(c, phys_ofs, sizeof(rr), &length, (char *)&rr); 550aa98d7cfSKaiGai Kohei if (ret || sizeof(rr) != length) { 55189291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_write() returned %d, request=%zu, retlen=%zu, at %#08x\n", 552aa98d7cfSKaiGai Kohei ret, sizeof(rr), length, phys_ofs); 553aa98d7cfSKaiGai Kohei ret = ret ? ret : -EIO; 5542f785402SDavid Woodhouse if (length) 5552f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(sizeof(rr)), NULL); 5562f785402SDavid Woodhouse 557aa98d7cfSKaiGai Kohei return ret; 558aa98d7cfSKaiGai Kohei } 559c9f700f8SKaiGai Kohei /* success */ 560c9f700f8SKaiGai Kohei ref->xseqno = xseqno; 561c9f700f8SKaiGai Kohei jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(sizeof(rr)), (void *)ref); 562aa98d7cfSKaiGai Kohei 563aa98d7cfSKaiGai Kohei dbg_xattr("success on saving xref (ino=%u, xid=%u)\n", ref->ic->ino, ref->xd->xid); 564aa98d7cfSKaiGai Kohei 565aa98d7cfSKaiGai Kohei return 0; 566aa98d7cfSKaiGai Kohei } 567aa98d7cfSKaiGai Kohei 568aa98d7cfSKaiGai Kohei static struct jffs2_xattr_ref *create_xattr_ref(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, 5699fe4854cSDavid Woodhouse struct jffs2_xattr_datum *xd) 570aa98d7cfSKaiGai Kohei { 571aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 572aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref; 573aa98d7cfSKaiGai Kohei int ret; 574aa98d7cfSKaiGai Kohei 575aa98d7cfSKaiGai Kohei ref = jffs2_alloc_xattr_ref(); 576aa98d7cfSKaiGai Kohei if (!ref) 577aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 578aa98d7cfSKaiGai Kohei ref->ic = ic; 579aa98d7cfSKaiGai Kohei ref->xd = xd; 580aa98d7cfSKaiGai Kohei 5819fe4854cSDavid Woodhouse ret = save_xattr_ref(c, ref); 582aa98d7cfSKaiGai Kohei if (ret) { 583aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 584aa98d7cfSKaiGai Kohei return ERR_PTR(ret); 585aa98d7cfSKaiGai Kohei } 586aa98d7cfSKaiGai Kohei 587aa98d7cfSKaiGai Kohei /* Chain to inode */ 5888f2b6f49SKaiGai Kohei ref->next = ic->xref; 5898f2b6f49SKaiGai Kohei ic->xref = ref; 590aa98d7cfSKaiGai Kohei 591aa98d7cfSKaiGai Kohei return ref; /* success */ 592aa98d7cfSKaiGai Kohei } 593aa98d7cfSKaiGai Kohei 594c9f700f8SKaiGai Kohei static void delete_xattr_ref_delay(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 595c9f700f8SKaiGai Kohei { 596c9f700f8SKaiGai Kohei /* must be called under down_write(xattr_sem) */ 597c9f700f8SKaiGai Kohei struct jffs2_xattr_datum *xd; 598c9f700f8SKaiGai Kohei 599c9f700f8SKaiGai Kohei set_xattr_ref_dead(ref); 600c9f700f8SKaiGai Kohei xd = ref->xd; 601c9f700f8SKaiGai Kohei ref->ino = ref->ic->ino; 602c9f700f8SKaiGai Kohei ref->xid = ref->xd->xid; 603c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 604c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 605c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 606c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 607c9f700f8SKaiGai Kohei 608c9f700f8SKaiGai Kohei JFFS2_NOTICE("xref(ino=%u, xid=%u) was removed without delete marker. " 609c9f700f8SKaiGai Kohei "An orphan xref may be detected on next mounting.\n", 610c9f700f8SKaiGai Kohei ref->ino, ref->xid); 611c9f700f8SKaiGai Kohei 612c9f700f8SKaiGai Kohei if (!--xd->refcnt) 613c9f700f8SKaiGai Kohei delete_xattr_datum_delay(c, xd); 614c9f700f8SKaiGai Kohei } 615c9f700f8SKaiGai Kohei 616c9f700f8SKaiGai Kohei static int delete_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, int enforce) 617c9f700f8SKaiGai Kohei { 618c9f700f8SKaiGai Kohei /* must be called under jffs2_reserve_space() and down_write(xattr_sem) */ 619c9f700f8SKaiGai Kohei struct jffs2_inode_cache *ic; 620c9f700f8SKaiGai Kohei struct jffs2_xattr_datum *xd; 621c9f700f8SKaiGai Kohei uint32_t length; 622c9f700f8SKaiGai Kohei int rc; 623c9f700f8SKaiGai Kohei 624c9f700f8SKaiGai Kohei set_xattr_ref_dead(ref); 625c9f700f8SKaiGai Kohei ic = ref->ic; 626c9f700f8SKaiGai Kohei xd = ref->xd; 627c9f700f8SKaiGai Kohei ref->ino = ic->ino; 628c9f700f8SKaiGai Kohei ref->xid = xd->xid; 629c9f700f8SKaiGai Kohei rc = save_xattr_ref(c, ref); 630c9f700f8SKaiGai Kohei if (rc) { 631c9f700f8SKaiGai Kohei if (!enforce) { 632c9f700f8SKaiGai Kohei clr_xattr_ref_dead(ref); 633c9f700f8SKaiGai Kohei ref->ic = ic; 634c9f700f8SKaiGai Kohei ref->xd = xd; 635c9f700f8SKaiGai Kohei return rc; 636c9f700f8SKaiGai Kohei } 637c9f700f8SKaiGai Kohei JFFS2_WARNING("could not write delete marker of xref(ino=%u, xid=%u). " 638c9f700f8SKaiGai Kohei "An orphan xref may be detected on next mounting.\n", 639c9f700f8SKaiGai Kohei ref->ic->ino, ref->xd->xid); 640c9f700f8SKaiGai Kohei } 641c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 642c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 643c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 644c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 645c9f700f8SKaiGai Kohei 646c9f700f8SKaiGai Kohei xd->refcnt--; 647c9f700f8SKaiGai Kohei if (xd->refcnt) 648c9f700f8SKaiGai Kohei return 0; 649c9f700f8SKaiGai Kohei 650c9f700f8SKaiGai Kohei /* delete xdatum */ 651c9f700f8SKaiGai Kohei unload_xattr_datum(c, xd); 652c9f700f8SKaiGai Kohei up_write(&c->xattr_sem); 653c9f700f8SKaiGai Kohei jffs2_complete_reservation(c); 654c9f700f8SKaiGai Kohei 655c9f700f8SKaiGai Kohei rc = jffs2_reserve_space(c, PAD(sizeof(struct jffs2_raw_xattr)), &length, 656c9f700f8SKaiGai Kohei ALLOC_DELETION, JFFS2_SUMMARY_XATTR_SIZE); 657c9f700f8SKaiGai Kohei if (rc) { 658c9f700f8SKaiGai Kohei down(&c->alloc_sem); 659c9f700f8SKaiGai Kohei down_write(&c->xattr_sem); 660c9f700f8SKaiGai Kohei delete_xattr_datum_delay(c, xd); 661c9f700f8SKaiGai Kohei } else { 662c9f700f8SKaiGai Kohei down_write(&c->xattr_sem); 663c9f700f8SKaiGai Kohei delete_xattr_datum(c, xd); 664c9f700f8SKaiGai Kohei } 665c9f700f8SKaiGai Kohei return 0; 666c9f700f8SKaiGai Kohei } 667c9f700f8SKaiGai Kohei 668aa98d7cfSKaiGai Kohei void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 669aa98d7cfSKaiGai Kohei { 670aa98d7cfSKaiGai Kohei /* It's called from jffs2_clear_inode() on inode removing. 671aa98d7cfSKaiGai Kohei When an inode with XATTR is removed, those XATTRs must be removed. */ 672c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *ref; 673c9f700f8SKaiGai Kohei uint32_t length; 674c9f700f8SKaiGai Kohei int rc, retry; 675aa98d7cfSKaiGai Kohei 676aa98d7cfSKaiGai Kohei if (!ic || ic->nlink > 0) 677aa98d7cfSKaiGai Kohei return; 678aa98d7cfSKaiGai Kohei 679c9f700f8SKaiGai Kohei down_read(&c->xattr_sem); 680c9f700f8SKaiGai Kohei if (!ic->xref) { 681c9f700f8SKaiGai Kohei up_read(&c->xattr_sem); 682c9f700f8SKaiGai Kohei return; 6838f2b6f49SKaiGai Kohei } 684c9f700f8SKaiGai Kohei up_read(&c->xattr_sem); 685c9f700f8SKaiGai Kohei retry: 686c9f700f8SKaiGai Kohei rc = jffs2_reserve_space(c, PAD(sizeof(struct jffs2_raw_xref)), &length, 687c9f700f8SKaiGai Kohei ALLOC_DELETION, JFFS2_SUMMARY_XREF_SIZE); 688c9f700f8SKaiGai Kohei down_write(&c->xattr_sem); 689c9f700f8SKaiGai Kohei if (ic->xref) { 690c9f700f8SKaiGai Kohei ref = ic->xref; 691c9f700f8SKaiGai Kohei ic->xref = ref->next; 692c9f700f8SKaiGai Kohei if (rc) { 693c9f700f8SKaiGai Kohei delete_xattr_ref_delay(c, ref); 694c9f700f8SKaiGai Kohei } else { 695c9f700f8SKaiGai Kohei delete_xattr_ref(c, ref, 1); 696c9f700f8SKaiGai Kohei } 697c9f700f8SKaiGai Kohei } 698c9f700f8SKaiGai Kohei retry = ic->xref ? 1 : 0; 699aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 700c9f700f8SKaiGai Kohei if (!rc) 701c9f700f8SKaiGai Kohei jffs2_complete_reservation(c); 702c9f700f8SKaiGai Kohei if (retry) 703c9f700f8SKaiGai Kohei goto retry; 704aa98d7cfSKaiGai Kohei } 705aa98d7cfSKaiGai Kohei 706aa98d7cfSKaiGai Kohei void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 707aa98d7cfSKaiGai Kohei { 708aa98d7cfSKaiGai Kohei /* It's called from jffs2_free_ino_caches() until unmounting FS. */ 709aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 710aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 711aa98d7cfSKaiGai Kohei 712aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 7138f2b6f49SKaiGai Kohei for (ref = ic->xref; ref; ref = _ref) { 7148f2b6f49SKaiGai Kohei _ref = ref->next; 715aa98d7cfSKaiGai Kohei xd = ref->xd; 716aa98d7cfSKaiGai Kohei xd->refcnt--; 717aa98d7cfSKaiGai Kohei if (!xd->refcnt) { 718aa98d7cfSKaiGai Kohei unload_xattr_datum(c, xd); 719aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 720aa98d7cfSKaiGai Kohei } 721aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 722aa98d7cfSKaiGai Kohei } 7238f2b6f49SKaiGai Kohei ic->xref = NULL; 724aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 725aa98d7cfSKaiGai Kohei } 726aa98d7cfSKaiGai Kohei 7278f2b6f49SKaiGai Kohei static int check_xattr_ref_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 728aa98d7cfSKaiGai Kohei { 7298f2b6f49SKaiGai Kohei /* success of check_xattr_ref_inode() means taht inode (ic) dose not have 730aa98d7cfSKaiGai Kohei * duplicate name/value pairs. If duplicate name/value pair would be found, 731aa98d7cfSKaiGai Kohei * one will be removed. 732aa98d7cfSKaiGai Kohei */ 733c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *ref, *cmp, **pref, **pcmp; 734aa98d7cfSKaiGai Kohei int rc = 0; 735aa98d7cfSKaiGai Kohei 736aa98d7cfSKaiGai Kohei if (likely(ic->flags & INO_FLAGS_XATTR_CHECKED)) 737aa98d7cfSKaiGai Kohei return 0; 738aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 739aa98d7cfSKaiGai Kohei retry: 740aa98d7cfSKaiGai Kohei rc = 0; 7418f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 742aa98d7cfSKaiGai Kohei if (!ref->xd->xname) { 743aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, ref->xd); 744aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 7458f2b6f49SKaiGai Kohei *pref = ref->next; 746c9f700f8SKaiGai Kohei delete_xattr_ref_delay(c, ref); 747aa98d7cfSKaiGai Kohei goto retry; 748aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 749aa98d7cfSKaiGai Kohei goto out; 750aa98d7cfSKaiGai Kohei } 751c9f700f8SKaiGai Kohei for (cmp=ref->next, pcmp=&ref->next; cmp; pcmp=&cmp->next, cmp=cmp->next) { 752aa98d7cfSKaiGai Kohei if (!cmp->xd->xname) { 753aa98d7cfSKaiGai Kohei ref->xd->flags |= JFFS2_XFLAGS_BIND; 754aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, cmp->xd); 755aa98d7cfSKaiGai Kohei ref->xd->flags &= ~JFFS2_XFLAGS_BIND; 756aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 757c9f700f8SKaiGai Kohei *pcmp = cmp->next; 758c9f700f8SKaiGai Kohei delete_xattr_ref_delay(c, cmp); 759aa98d7cfSKaiGai Kohei goto retry; 760aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 761aa98d7cfSKaiGai Kohei goto out; 762aa98d7cfSKaiGai Kohei } 763aa98d7cfSKaiGai Kohei if (ref->xd->xprefix == cmp->xd->xprefix 764aa98d7cfSKaiGai Kohei && !strcmp(ref->xd->xname, cmp->xd->xname)) { 765c9f700f8SKaiGai Kohei if (ref->xseqno > cmp->xseqno) { 766c9f700f8SKaiGai Kohei *pcmp = cmp->next; 767c9f700f8SKaiGai Kohei delete_xattr_ref_delay(c, cmp); 768c9f700f8SKaiGai Kohei } else { 769c9f700f8SKaiGai Kohei *pref = ref->next; 770c9f700f8SKaiGai Kohei delete_xattr_ref_delay(c, ref); 771c9f700f8SKaiGai Kohei } 772aa98d7cfSKaiGai Kohei goto retry; 773aa98d7cfSKaiGai Kohei } 774aa98d7cfSKaiGai Kohei } 775aa98d7cfSKaiGai Kohei } 776aa98d7cfSKaiGai Kohei ic->flags |= INO_FLAGS_XATTR_CHECKED; 777aa98d7cfSKaiGai Kohei out: 778aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 779aa98d7cfSKaiGai Kohei 780aa98d7cfSKaiGai Kohei return rc; 781aa98d7cfSKaiGai Kohei } 782aa98d7cfSKaiGai Kohei 783aa98d7cfSKaiGai Kohei /* -------- xattr subsystem functions --------------- 784aa98d7cfSKaiGai Kohei * jffs2_init_xattr_subsystem(c) 785aa98d7cfSKaiGai Kohei * is used to initialize semaphore and list_head, and some variables. 786aa98d7cfSKaiGai Kohei * jffs2_find_xattr_datum(c, xid) 787aa98d7cfSKaiGai Kohei * is used to lookup xdatum while scanning process. 788aa98d7cfSKaiGai Kohei * jffs2_clear_xattr_subsystem(c) 789aa98d7cfSKaiGai Kohei * is used to release any xattr related objects. 790aa98d7cfSKaiGai Kohei * jffs2_build_xattr_subsystem(c) 791aa98d7cfSKaiGai Kohei * is used to associate xdatum and xref while super block building process. 792aa98d7cfSKaiGai Kohei * jffs2_setup_xattr_datum(c, xid, version) 793aa98d7cfSKaiGai Kohei * is used to insert xdatum while scanning process. 794aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 795aa98d7cfSKaiGai Kohei void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c) 796aa98d7cfSKaiGai Kohei { 797aa98d7cfSKaiGai Kohei int i; 798aa98d7cfSKaiGai Kohei 799aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) 800aa98d7cfSKaiGai Kohei INIT_LIST_HEAD(&c->xattrindex[i]); 801aa98d7cfSKaiGai Kohei INIT_LIST_HEAD(&c->xattr_unchecked); 802c9f700f8SKaiGai Kohei INIT_LIST_HEAD(&c->xattr_dead_list); 803c9f700f8SKaiGai Kohei c->xref_dead_list = NULL; 8048f2b6f49SKaiGai Kohei c->xref_temp = NULL; 805aa98d7cfSKaiGai Kohei 806aa98d7cfSKaiGai Kohei init_rwsem(&c->xattr_sem); 807c9f700f8SKaiGai Kohei c->highest_xid = 0; 808c9f700f8SKaiGai Kohei c->highest_xseqno = 0; 809aa98d7cfSKaiGai Kohei c->xdatum_mem_usage = 0; 810aa98d7cfSKaiGai Kohei c->xdatum_mem_threshold = 32 * 1024; /* Default 32KB */ 811aa98d7cfSKaiGai Kohei } 812aa98d7cfSKaiGai Kohei 813aa98d7cfSKaiGai Kohei static struct jffs2_xattr_datum *jffs2_find_xattr_datum(struct jffs2_sb_info *c, uint32_t xid) 814aa98d7cfSKaiGai Kohei { 815aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 816aa98d7cfSKaiGai Kohei int i = xid % XATTRINDEX_HASHSIZE; 817aa98d7cfSKaiGai Kohei 818aa98d7cfSKaiGai Kohei /* It's only used in scanning/building process. */ 819aa98d7cfSKaiGai Kohei BUG_ON(!(c->flags & (JFFS2_SB_FLAG_SCANNING|JFFS2_SB_FLAG_BUILDING))); 820aa98d7cfSKaiGai Kohei 821aa98d7cfSKaiGai Kohei list_for_each_entry(xd, &c->xattrindex[i], xindex) { 822aa98d7cfSKaiGai Kohei if (xd->xid==xid) 823aa98d7cfSKaiGai Kohei return xd; 824aa98d7cfSKaiGai Kohei } 825aa98d7cfSKaiGai Kohei return NULL; 826aa98d7cfSKaiGai Kohei } 827aa98d7cfSKaiGai Kohei 828aa98d7cfSKaiGai Kohei void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c) 829aa98d7cfSKaiGai Kohei { 830aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 831aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 832aa98d7cfSKaiGai Kohei int i; 833aa98d7cfSKaiGai Kohei 8348f2b6f49SKaiGai Kohei for (ref=c->xref_temp; ref; ref = _ref) { 8358f2b6f49SKaiGai Kohei _ref = ref->next; 836aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 8378f2b6f49SKaiGai Kohei } 838c9f700f8SKaiGai Kohei 839c9f700f8SKaiGai Kohei for (ref=c->xref_dead_list; ref; ref = _ref) { 840c9f700f8SKaiGai Kohei _ref = ref->next; 841c9f700f8SKaiGai Kohei jffs2_free_xattr_ref(ref); 842c9f700f8SKaiGai Kohei } 843aa98d7cfSKaiGai Kohei 844aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) { 845aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { 846aa98d7cfSKaiGai Kohei list_del(&xd->xindex); 847aa98d7cfSKaiGai Kohei if (xd->xname) 848aa98d7cfSKaiGai Kohei kfree(xd->xname); 849aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 850aa98d7cfSKaiGai Kohei } 851aa98d7cfSKaiGai Kohei } 852c9f700f8SKaiGai Kohei 853c9f700f8SKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattr_dead_list, xindex) { 854c9f700f8SKaiGai Kohei list_del(&xd->xindex); 855c9f700f8SKaiGai Kohei jffs2_free_xattr_datum(xd); 856c9f700f8SKaiGai Kohei } 857aa98d7cfSKaiGai Kohei } 858aa98d7cfSKaiGai Kohei 859c9f700f8SKaiGai Kohei #define XREF_TMPHASH_SIZE (128) 860aa98d7cfSKaiGai Kohei void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c) 861aa98d7cfSKaiGai Kohei { 862aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 863c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *xref_tmphash[XREF_TMPHASH_SIZE]; 864aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 865aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic; 866c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 867aa98d7cfSKaiGai Kohei int i, xdatum_count = 0, xdatum_unchecked_count = 0, xref_count = 0; 868aa98d7cfSKaiGai Kohei 869aa98d7cfSKaiGai Kohei BUG_ON(!(c->flags & JFFS2_SB_FLAG_BUILDING)); 870c9f700f8SKaiGai Kohei /* Phase.1 : Drop dead xdatum */ 871c9f700f8SKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) { 872c9f700f8SKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { 873c9f700f8SKaiGai Kohei BUG_ON(xd->node == (void *)xd); 874c9f700f8SKaiGai Kohei if (is_xattr_datum_dead(xd)) { 875c9f700f8SKaiGai Kohei list_del_init(&xd->xindex); 876c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_unchecked); 877c9f700f8SKaiGai Kohei } 878c9f700f8SKaiGai Kohei } 879c9f700f8SKaiGai Kohei } 880aa98d7cfSKaiGai Kohei 881c9f700f8SKaiGai Kohei /* Phase.2 : Merge same xref */ 882c9f700f8SKaiGai Kohei for (i=0; i < XREF_TMPHASH_SIZE; i++) 883c9f700f8SKaiGai Kohei xref_tmphash[i] = NULL; 8848f2b6f49SKaiGai Kohei for (ref=c->xref_temp; ref; ref=_ref) { 885c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *tmp; 886c9f700f8SKaiGai Kohei 8878f2b6f49SKaiGai Kohei _ref = ref->next; 888aa98d7cfSKaiGai Kohei if (ref_flags(ref->node) != REF_PRISTINE) { 889aa98d7cfSKaiGai Kohei if (verify_xattr_ref(c, ref)) { 890c9f700f8SKaiGai Kohei BUG_ON(ref->node->next_in_ino != (void *)ref); 891c9f700f8SKaiGai Kohei ref->node->next_in_ino = NULL; 892c9f700f8SKaiGai Kohei jffs2_mark_node_obsolete(c, ref->node); 893aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 894aa98d7cfSKaiGai Kohei continue; 895aa98d7cfSKaiGai Kohei } 896aa98d7cfSKaiGai Kohei } 897c9f700f8SKaiGai Kohei 898c9f700f8SKaiGai Kohei i = (ref->ino ^ ref->xid) % XREF_TMPHASH_SIZE; 899c9f700f8SKaiGai Kohei for (tmp=xref_tmphash[i]; tmp; tmp=tmp->next) { 900c9f700f8SKaiGai Kohei if (tmp->ino == ref->ino && tmp->xid == ref->xid) 901c9f700f8SKaiGai Kohei break; 902c9f700f8SKaiGai Kohei } 903c9f700f8SKaiGai Kohei if (tmp) { 904c9f700f8SKaiGai Kohei raw = ref->node; 905c9f700f8SKaiGai Kohei if (ref->xseqno > tmp->xseqno) { 906c9f700f8SKaiGai Kohei tmp->xseqno = ref->xseqno; 907c9f700f8SKaiGai Kohei raw->next_in_ino = tmp->node; 908c9f700f8SKaiGai Kohei tmp->node = raw; 909c9f700f8SKaiGai Kohei } else { 910c9f700f8SKaiGai Kohei raw->next_in_ino = tmp->node->next_in_ino; 911c9f700f8SKaiGai Kohei tmp->node->next_in_ino = raw; 912c9f700f8SKaiGai Kohei } 913c9f700f8SKaiGai Kohei jffs2_free_xattr_ref(ref); 914c9f700f8SKaiGai Kohei continue; 915c9f700f8SKaiGai Kohei } else { 916c9f700f8SKaiGai Kohei ref->next = xref_tmphash[i]; 917c9f700f8SKaiGai Kohei xref_tmphash[i] = ref; 918c9f700f8SKaiGai Kohei } 919c9f700f8SKaiGai Kohei } 920c9f700f8SKaiGai Kohei c->xref_temp = NULL; 921c9f700f8SKaiGai Kohei 922c9f700f8SKaiGai Kohei /* Phase.3 : Bind xref with inode_cache and xattr_datum */ 923c9f700f8SKaiGai Kohei for (i=0; i < XREF_TMPHASH_SIZE; i++) { 924c9f700f8SKaiGai Kohei for (ref=xref_tmphash[i]; ref; ref=_ref) { 925c9f700f8SKaiGai Kohei _ref = ref->next; 926c9f700f8SKaiGai Kohei if (is_xattr_ref_dead(ref)) { 927c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 928c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 929c9f700f8SKaiGai Kohei continue; 930c9f700f8SKaiGai Kohei } 931aa98d7cfSKaiGai Kohei /* At this point, ref->xid and ref->ino contain XID and inode number. 932aa98d7cfSKaiGai Kohei ref->xd and ref->ic are not valid yet. */ 933aa98d7cfSKaiGai Kohei xd = jffs2_find_xattr_datum(c, ref->xid); 934aa98d7cfSKaiGai Kohei ic = jffs2_get_ino_cache(c, ref->ino); 935aa98d7cfSKaiGai Kohei if (!xd || !ic) { 936c9f700f8SKaiGai Kohei JFFS2_WARNING("xref(ino=%u, xid=%u, xseqno=%u) is orphan. \n", 937c9f700f8SKaiGai Kohei ref->ino, ref->xid, ref->xseqno); 938c9f700f8SKaiGai Kohei set_xattr_ref_dead(ref); 939c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 940c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 941aa98d7cfSKaiGai Kohei continue; 942aa98d7cfSKaiGai Kohei } 943aa98d7cfSKaiGai Kohei ref->xd = xd; 944aa98d7cfSKaiGai Kohei ref->ic = ic; 945aa98d7cfSKaiGai Kohei xd->refcnt++; 9468f2b6f49SKaiGai Kohei ref->next = ic->xref; 9478f2b6f49SKaiGai Kohei ic->xref = ref; 948aa98d7cfSKaiGai Kohei xref_count++; 949aa98d7cfSKaiGai Kohei } 950c9f700f8SKaiGai Kohei } 951aa98d7cfSKaiGai Kohei 952c9f700f8SKaiGai Kohei /* Phase.4 : Link unchecked xdatum to xattr_unchecked list */ 953aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) { 954aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { 955aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 956aa98d7cfSKaiGai Kohei if (!xd->refcnt) { 957c9f700f8SKaiGai Kohei JFFS2_WARNING("orphan xdatum(xid=%u, version=%u)\n", 958c9f700f8SKaiGai Kohei xd->xid, xd->version); 959c9f700f8SKaiGai Kohei set_xattr_datum_dead(xd); 960c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_unchecked); 961aa98d7cfSKaiGai Kohei continue; 962aa98d7cfSKaiGai Kohei } 963c9f700f8SKaiGai Kohei if (is_xattr_datum_unchecked(c, xd)) { 964c9f700f8SKaiGai Kohei dbg_xattr("unchecked xdatum(xid=%u, version=%u)\n", 965c9f700f8SKaiGai Kohei xd->xid, xd->version); 966aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattr_unchecked); 967aa98d7cfSKaiGai Kohei xdatum_unchecked_count++; 968aa98d7cfSKaiGai Kohei } 969aa98d7cfSKaiGai Kohei xdatum_count++; 970aa98d7cfSKaiGai Kohei } 971aa98d7cfSKaiGai Kohei } 972aa98d7cfSKaiGai Kohei /* build complete */ 973aa98d7cfSKaiGai Kohei JFFS2_NOTICE("complete building xattr subsystem, %u of xdatum (%u unchecked) and " 974aa98d7cfSKaiGai Kohei "%u of xref found.\n", xdatum_count, xdatum_unchecked_count, xref_count); 975aa98d7cfSKaiGai Kohei } 976aa98d7cfSKaiGai Kohei 977aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, 978aa98d7cfSKaiGai Kohei uint32_t xid, uint32_t version) 979aa98d7cfSKaiGai Kohei { 980c9f700f8SKaiGai Kohei struct jffs2_xattr_datum *xd; 981aa98d7cfSKaiGai Kohei 982c9f700f8SKaiGai Kohei xd = jffs2_find_xattr_datum(c, xid); 983c9f700f8SKaiGai Kohei if (!xd) { 984aa98d7cfSKaiGai Kohei xd = jffs2_alloc_xattr_datum(); 985aa98d7cfSKaiGai Kohei if (!xd) 986aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 987aa98d7cfSKaiGai Kohei xd->xid = xid; 988aa98d7cfSKaiGai Kohei xd->version = version; 989aa98d7cfSKaiGai Kohei if (xd->xid > c->highest_xid) 990aa98d7cfSKaiGai Kohei c->highest_xid = xd->xid; 991aa98d7cfSKaiGai Kohei list_add_tail(&xd->xindex, &c->xattrindex[xid % XATTRINDEX_HASHSIZE]); 992aa98d7cfSKaiGai Kohei } 993aa98d7cfSKaiGai Kohei return xd; 994aa98d7cfSKaiGai Kohei } 995aa98d7cfSKaiGai Kohei 996aa98d7cfSKaiGai Kohei /* -------- xattr subsystem functions --------------- 997aa98d7cfSKaiGai Kohei * xprefix_to_handler(xprefix) 998aa98d7cfSKaiGai Kohei * is used to translate xprefix into xattr_handler. 999aa98d7cfSKaiGai Kohei * jffs2_listxattr(dentry, buffer, size) 1000aa98d7cfSKaiGai Kohei * is an implementation of listxattr handler on jffs2. 1001aa98d7cfSKaiGai Kohei * do_jffs2_getxattr(inode, xprefix, xname, buffer, size) 1002aa98d7cfSKaiGai Kohei * is an implementation of getxattr handler on jffs2. 1003aa98d7cfSKaiGai Kohei * do_jffs2_setxattr(inode, xprefix, xname, buffer, size, flags) 1004aa98d7cfSKaiGai Kohei * is an implementation of setxattr handler on jffs2. 1005aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 1006aa98d7cfSKaiGai Kohei struct xattr_handler *jffs2_xattr_handlers[] = { 1007aa98d7cfSKaiGai Kohei &jffs2_user_xattr_handler, 1008aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 1009aa98d7cfSKaiGai Kohei &jffs2_security_xattr_handler, 1010aa98d7cfSKaiGai Kohei #endif 1011aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 1012aa98d7cfSKaiGai Kohei &jffs2_acl_access_xattr_handler, 1013aa98d7cfSKaiGai Kohei &jffs2_acl_default_xattr_handler, 1014aa98d7cfSKaiGai Kohei #endif 1015aa98d7cfSKaiGai Kohei &jffs2_trusted_xattr_handler, 1016aa98d7cfSKaiGai Kohei NULL 1017aa98d7cfSKaiGai Kohei }; 1018aa98d7cfSKaiGai Kohei 1019aa98d7cfSKaiGai Kohei static struct xattr_handler *xprefix_to_handler(int xprefix) { 1020aa98d7cfSKaiGai Kohei struct xattr_handler *ret; 1021aa98d7cfSKaiGai Kohei 1022aa98d7cfSKaiGai Kohei switch (xprefix) { 1023aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_USER: 1024aa98d7cfSKaiGai Kohei ret = &jffs2_user_xattr_handler; 1025aa98d7cfSKaiGai Kohei break; 1026aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 1027aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_SECURITY: 1028aa98d7cfSKaiGai Kohei ret = &jffs2_security_xattr_handler; 1029aa98d7cfSKaiGai Kohei break; 1030aa98d7cfSKaiGai Kohei #endif 1031aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 1032aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_ACL_ACCESS: 1033aa98d7cfSKaiGai Kohei ret = &jffs2_acl_access_xattr_handler; 1034aa98d7cfSKaiGai Kohei break; 1035aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_ACL_DEFAULT: 1036aa98d7cfSKaiGai Kohei ret = &jffs2_acl_default_xattr_handler; 1037aa98d7cfSKaiGai Kohei break; 1038aa98d7cfSKaiGai Kohei #endif 1039aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_TRUSTED: 1040aa98d7cfSKaiGai Kohei ret = &jffs2_trusted_xattr_handler; 1041aa98d7cfSKaiGai Kohei break; 1042aa98d7cfSKaiGai Kohei default: 1043aa98d7cfSKaiGai Kohei ret = NULL; 1044aa98d7cfSKaiGai Kohei break; 1045aa98d7cfSKaiGai Kohei } 1046aa98d7cfSKaiGai Kohei return ret; 1047aa98d7cfSKaiGai Kohei } 1048aa98d7cfSKaiGai Kohei 1049aa98d7cfSKaiGai Kohei ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size) 1050aa98d7cfSKaiGai Kohei { 1051aa98d7cfSKaiGai Kohei struct inode *inode = dentry->d_inode; 1052aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 1053aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 1054aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 10558f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, **pref; 1056aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 1057aa98d7cfSKaiGai Kohei struct xattr_handler *xhandle; 1058aa98d7cfSKaiGai Kohei ssize_t len, rc; 1059aa98d7cfSKaiGai Kohei int retry = 0; 1060aa98d7cfSKaiGai Kohei 10618f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 1062aa98d7cfSKaiGai Kohei if (unlikely(rc)) 1063aa98d7cfSKaiGai Kohei return rc; 1064aa98d7cfSKaiGai Kohei 1065aa98d7cfSKaiGai Kohei down_read(&c->xattr_sem); 1066aa98d7cfSKaiGai Kohei retry: 1067aa98d7cfSKaiGai Kohei len = 0; 10688f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 1069aa98d7cfSKaiGai Kohei BUG_ON(ref->ic != ic); 1070aa98d7cfSKaiGai Kohei xd = ref->xd; 1071aa98d7cfSKaiGai Kohei if (!xd->xname) { 1072aa98d7cfSKaiGai Kohei /* xdatum is unchached */ 1073aa98d7cfSKaiGai Kohei if (!retry) { 1074aa98d7cfSKaiGai Kohei retry = 1; 1075aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1076aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1077aa98d7cfSKaiGai Kohei goto retry; 1078aa98d7cfSKaiGai Kohei } else { 1079aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1080aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 10818f2b6f49SKaiGai Kohei *pref = ref->next; 1082c9f700f8SKaiGai Kohei delete_xattr_ref_delay(c, ref); 1083aa98d7cfSKaiGai Kohei goto retry; 1084aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 1085aa98d7cfSKaiGai Kohei goto out; 1086aa98d7cfSKaiGai Kohei } 1087aa98d7cfSKaiGai Kohei } 1088aa98d7cfSKaiGai Kohei xhandle = xprefix_to_handler(xd->xprefix); 1089aa98d7cfSKaiGai Kohei if (!xhandle) 1090aa98d7cfSKaiGai Kohei continue; 1091aa98d7cfSKaiGai Kohei if (buffer) { 1092aa98d7cfSKaiGai Kohei rc = xhandle->list(inode, buffer+len, size-len, xd->xname, xd->name_len); 1093aa98d7cfSKaiGai Kohei } else { 1094aa98d7cfSKaiGai Kohei rc = xhandle->list(inode, NULL, 0, xd->xname, xd->name_len); 1095aa98d7cfSKaiGai Kohei } 1096aa98d7cfSKaiGai Kohei if (rc < 0) 1097aa98d7cfSKaiGai Kohei goto out; 1098aa98d7cfSKaiGai Kohei len += rc; 1099aa98d7cfSKaiGai Kohei } 1100aa98d7cfSKaiGai Kohei rc = len; 1101aa98d7cfSKaiGai Kohei out: 1102aa98d7cfSKaiGai Kohei if (!retry) { 1103aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1104aa98d7cfSKaiGai Kohei } else { 1105aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1106aa98d7cfSKaiGai Kohei } 1107aa98d7cfSKaiGai Kohei return rc; 1108aa98d7cfSKaiGai Kohei } 1109aa98d7cfSKaiGai Kohei 1110aa98d7cfSKaiGai Kohei int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, 1111aa98d7cfSKaiGai Kohei char *buffer, size_t size) 1112aa98d7cfSKaiGai Kohei { 1113aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 1114aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 1115aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 1116aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 11178f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, **pref; 1118aa98d7cfSKaiGai Kohei int rc, retry = 0; 1119aa98d7cfSKaiGai Kohei 11208f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 1121aa98d7cfSKaiGai Kohei if (unlikely(rc)) 1122aa98d7cfSKaiGai Kohei return rc; 1123aa98d7cfSKaiGai Kohei 1124aa98d7cfSKaiGai Kohei down_read(&c->xattr_sem); 1125aa98d7cfSKaiGai Kohei retry: 11268f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 1127aa98d7cfSKaiGai Kohei BUG_ON(ref->ic!=ic); 1128aa98d7cfSKaiGai Kohei 1129aa98d7cfSKaiGai Kohei xd = ref->xd; 1130aa98d7cfSKaiGai Kohei if (xd->xprefix != xprefix) 1131aa98d7cfSKaiGai Kohei continue; 1132aa98d7cfSKaiGai Kohei if (!xd->xname) { 1133aa98d7cfSKaiGai Kohei /* xdatum is unchached */ 1134aa98d7cfSKaiGai Kohei if (!retry) { 1135aa98d7cfSKaiGai Kohei retry = 1; 1136aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1137aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1138aa98d7cfSKaiGai Kohei goto retry; 1139aa98d7cfSKaiGai Kohei } else { 1140aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1141aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 11428f2b6f49SKaiGai Kohei *pref = ref->next; 1143c9f700f8SKaiGai Kohei delete_xattr_ref_delay(c, ref); 1144aa98d7cfSKaiGai Kohei goto retry; 1145aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) { 1146aa98d7cfSKaiGai Kohei goto out; 1147aa98d7cfSKaiGai Kohei } 1148aa98d7cfSKaiGai Kohei } 1149aa98d7cfSKaiGai Kohei } 1150aa98d7cfSKaiGai Kohei if (!strcmp(xname, xd->xname)) { 1151aa98d7cfSKaiGai Kohei rc = xd->value_len; 1152aa98d7cfSKaiGai Kohei if (buffer) { 1153aa98d7cfSKaiGai Kohei if (size < rc) { 1154aa98d7cfSKaiGai Kohei rc = -ERANGE; 1155aa98d7cfSKaiGai Kohei } else { 1156aa98d7cfSKaiGai Kohei memcpy(buffer, xd->xvalue, rc); 1157aa98d7cfSKaiGai Kohei } 1158aa98d7cfSKaiGai Kohei } 1159aa98d7cfSKaiGai Kohei goto out; 1160aa98d7cfSKaiGai Kohei } 1161aa98d7cfSKaiGai Kohei } 1162aa98d7cfSKaiGai Kohei rc = -ENODATA; 1163aa98d7cfSKaiGai Kohei out: 1164aa98d7cfSKaiGai Kohei if (!retry) { 1165aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1166aa98d7cfSKaiGai Kohei } else { 1167aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1168aa98d7cfSKaiGai Kohei } 1169aa98d7cfSKaiGai Kohei return rc; 1170aa98d7cfSKaiGai Kohei } 1171aa98d7cfSKaiGai Kohei 1172aa98d7cfSKaiGai Kohei int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, 1173aa98d7cfSKaiGai Kohei const char *buffer, size_t size, int flags) 1174aa98d7cfSKaiGai Kohei { 1175aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 1176aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 1177aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 1178aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 11798f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, *newref, **pref; 11809fe4854cSDavid Woodhouse uint32_t length, request; 1181aa98d7cfSKaiGai Kohei int rc; 1182aa98d7cfSKaiGai Kohei 11838f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 1184aa98d7cfSKaiGai Kohei if (unlikely(rc)) 1185aa98d7cfSKaiGai Kohei return rc; 1186aa98d7cfSKaiGai Kohei 1187aa98d7cfSKaiGai Kohei request = PAD(sizeof(struct jffs2_raw_xattr) + strlen(xname) + 1 + size); 11889fe4854cSDavid Woodhouse rc = jffs2_reserve_space(c, request, &length, 1189aa98d7cfSKaiGai Kohei ALLOC_NORMAL, JFFS2_SUMMARY_XATTR_SIZE); 1190aa98d7cfSKaiGai Kohei if (rc) { 1191aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); 1192aa98d7cfSKaiGai Kohei return rc; 1193aa98d7cfSKaiGai Kohei } 1194aa98d7cfSKaiGai Kohei 1195aa98d7cfSKaiGai Kohei /* Find existing xattr */ 1196aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1197aa98d7cfSKaiGai Kohei retry: 11988f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 1199aa98d7cfSKaiGai Kohei xd = ref->xd; 1200aa98d7cfSKaiGai Kohei if (xd->xprefix != xprefix) 1201aa98d7cfSKaiGai Kohei continue; 1202aa98d7cfSKaiGai Kohei if (!xd->xname) { 1203aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1204aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 12058f2b6f49SKaiGai Kohei *pref = ref->next; 1206c9f700f8SKaiGai Kohei delete_xattr_ref_delay(c, ref); 1207aa98d7cfSKaiGai Kohei goto retry; 1208aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 1209aa98d7cfSKaiGai Kohei goto out; 1210aa98d7cfSKaiGai Kohei } 1211aa98d7cfSKaiGai Kohei if (!strcmp(xd->xname, xname)) { 1212aa98d7cfSKaiGai Kohei if (flags & XATTR_CREATE) { 1213aa98d7cfSKaiGai Kohei rc = -EEXIST; 1214aa98d7cfSKaiGai Kohei goto out; 1215aa98d7cfSKaiGai Kohei } 1216aa98d7cfSKaiGai Kohei if (!buffer) { 12178f2b6f49SKaiGai Kohei *pref = ref->next; 1218c9f700f8SKaiGai Kohei rc = delete_xattr_ref(c, ref, 0); 1219aa98d7cfSKaiGai Kohei goto out; 1220aa98d7cfSKaiGai Kohei } 1221aa98d7cfSKaiGai Kohei goto found; 1222aa98d7cfSKaiGai Kohei } 1223aa98d7cfSKaiGai Kohei } 1224aa98d7cfSKaiGai Kohei /* not found */ 1225aa98d7cfSKaiGai Kohei if (flags & XATTR_REPLACE) { 1226aa98d7cfSKaiGai Kohei rc = -ENODATA; 1227aa98d7cfSKaiGai Kohei goto out; 1228aa98d7cfSKaiGai Kohei } 1229aa98d7cfSKaiGai Kohei if (!buffer) { 1230c9f700f8SKaiGai Kohei rc = -ENODATA; 1231aa98d7cfSKaiGai Kohei goto out; 1232aa98d7cfSKaiGai Kohei } 1233aa98d7cfSKaiGai Kohei found: 12349fe4854cSDavid Woodhouse xd = create_xattr_datum(c, xprefix, xname, buffer, size); 1235aa98d7cfSKaiGai Kohei if (IS_ERR(xd)) { 1236aa98d7cfSKaiGai Kohei rc = PTR_ERR(xd); 1237aa98d7cfSKaiGai Kohei goto out; 1238aa98d7cfSKaiGai Kohei } 1239aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1240aa98d7cfSKaiGai Kohei jffs2_complete_reservation(c); 1241aa98d7cfSKaiGai Kohei 1242aa98d7cfSKaiGai Kohei /* create xattr_ref */ 1243aa98d7cfSKaiGai Kohei request = PAD(sizeof(struct jffs2_raw_xref)); 12449fe4854cSDavid Woodhouse rc = jffs2_reserve_space(c, request, &length, 1245aa98d7cfSKaiGai Kohei ALLOC_NORMAL, JFFS2_SUMMARY_XREF_SIZE); 1246c9f700f8SKaiGai Kohei down_write(&c->xattr_sem); 1247aa98d7cfSKaiGai Kohei if (rc) { 1248aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); 1249aa98d7cfSKaiGai Kohei xd->refcnt--; 1250aa98d7cfSKaiGai Kohei if (!xd->refcnt) 1251c9f700f8SKaiGai Kohei delete_xattr_datum_delay(c, xd); 1252aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1253aa98d7cfSKaiGai Kohei return rc; 1254aa98d7cfSKaiGai Kohei } 12558f2b6f49SKaiGai Kohei if (ref) 12568f2b6f49SKaiGai Kohei *pref = ref->next; 12579fe4854cSDavid Woodhouse newref = create_xattr_ref(c, ic, xd); 1258aa98d7cfSKaiGai Kohei if (IS_ERR(newref)) { 12598f2b6f49SKaiGai Kohei if (ref) { 12608f2b6f49SKaiGai Kohei ref->next = ic->xref; 12618f2b6f49SKaiGai Kohei ic->xref = ref; 12628f2b6f49SKaiGai Kohei } 1263aa98d7cfSKaiGai Kohei rc = PTR_ERR(newref); 1264aa98d7cfSKaiGai Kohei xd->refcnt--; 1265aa98d7cfSKaiGai Kohei if (!xd->refcnt) 1266c9f700f8SKaiGai Kohei delete_xattr_datum_delay(c, xd); 1267aa98d7cfSKaiGai Kohei } else if (ref) { 1268c9f700f8SKaiGai Kohei up_write(&c->xattr_sem); 1269c9f700f8SKaiGai Kohei jffs2_complete_reservation(c); 1270c9f700f8SKaiGai Kohei 1271c9f700f8SKaiGai Kohei rc = jffs2_reserve_space(c, request, &length, 1272c9f700f8SKaiGai Kohei ALLOC_DELETION, JFFS2_SUMMARY_XREF_SIZE); 1273c9f700f8SKaiGai Kohei down_write(&c->xattr_sem); 1274c9f700f8SKaiGai Kohei if (rc) { 1275c9f700f8SKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); 1276c9f700f8SKaiGai Kohei delete_xattr_ref_delay(c, ref); 1277c9f700f8SKaiGai Kohei up_write(&c->xattr_sem); 1278c9f700f8SKaiGai Kohei return 0; 1279c9f700f8SKaiGai Kohei } 1280c9f700f8SKaiGai Kohei delete_xattr_ref(c, ref, 1); 1281aa98d7cfSKaiGai Kohei } 1282aa98d7cfSKaiGai Kohei out: 1283aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1284aa98d7cfSKaiGai Kohei jffs2_complete_reservation(c); 1285aa98d7cfSKaiGai Kohei return rc; 1286aa98d7cfSKaiGai Kohei } 1287aa98d7cfSKaiGai Kohei 1288aa98d7cfSKaiGai Kohei /* -------- garbage collector functions ------------- 1289c9f700f8SKaiGai Kohei * jffs2_garbage_collect_xattr_datum(c, xd, raw) 1290aa98d7cfSKaiGai Kohei * is used to move xdatum into new node. 1291c9f700f8SKaiGai Kohei * jffs2_garbage_collect_xattr_ref(c, ref, raw) 1292aa98d7cfSKaiGai Kohei * is used to move xref into new node. 1293aa98d7cfSKaiGai Kohei * jffs2_verify_xattr(c) 1294aa98d7cfSKaiGai Kohei * is used to call do_verify_xattr_datum() before garbage collecting. 1295aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 1296c9f700f8SKaiGai Kohei int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, 1297c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw) 1298aa98d7cfSKaiGai Kohei { 12999fe4854cSDavid Woodhouse uint32_t totlen, length, old_ofs; 1300c9f700f8SKaiGai Kohei int rc = 0; 1301aa98d7cfSKaiGai Kohei 1302084702e0SKaiGai Kohei down_write(&c->xattr_sem); 1303c9f700f8SKaiGai Kohei if (xd->node != raw) 1304c9f700f8SKaiGai Kohei goto out; 1305c9f700f8SKaiGai Kohei if (is_xattr_datum_dead(xd) && (raw->next_in_ino == (void *)xd)) 1306c9f700f8SKaiGai Kohei goto out; 1307aa98d7cfSKaiGai Kohei 1308aa98d7cfSKaiGai Kohei old_ofs = ref_offset(xd->node); 1309aa98d7cfSKaiGai Kohei totlen = ref_totlen(c, c->gcblock, xd->node); 1310aa98d7cfSKaiGai Kohei 1311c9f700f8SKaiGai Kohei if (!is_xattr_datum_dead(xd)) { 1312aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1313c9f700f8SKaiGai Kohei if (unlikely(rc < 0)) 1314084702e0SKaiGai Kohei goto out; 1315aa98d7cfSKaiGai Kohei } 1316c9f700f8SKaiGai Kohei 13179fe4854cSDavid Woodhouse rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XATTR_SIZE); 1318c9f700f8SKaiGai Kohei if (rc) { 1319c9f700f8SKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space_gc()=%d, request=%u\n", rc, totlen); 1320084702e0SKaiGai Kohei rc = rc ? rc : -EBADFD; 1321084702e0SKaiGai Kohei goto out; 1322aa98d7cfSKaiGai Kohei } 13239fe4854cSDavid Woodhouse rc = save_xattr_datum(c, xd); 1324aa98d7cfSKaiGai Kohei if (!rc) 1325aa98d7cfSKaiGai Kohei dbg_xattr("xdatum (xid=%u, version=%u) GC'ed from %#08x to %08x\n", 1326aa98d7cfSKaiGai Kohei xd->xid, xd->version, old_ofs, ref_offset(xd->node)); 1327084702e0SKaiGai Kohei out: 1328c9f700f8SKaiGai Kohei if (!rc) 1329c9f700f8SKaiGai Kohei jffs2_mark_node_obsolete(c, raw); 1330084702e0SKaiGai Kohei up_write(&c->xattr_sem); 1331aa98d7cfSKaiGai Kohei return rc; 1332aa98d7cfSKaiGai Kohei } 1333aa98d7cfSKaiGai Kohei 1334aa98d7cfSKaiGai Kohei 1335c9f700f8SKaiGai Kohei int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, 1336c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw) 1337aa98d7cfSKaiGai Kohei { 13389fe4854cSDavid Woodhouse uint32_t totlen, length, old_ofs; 1339c9f700f8SKaiGai Kohei int rc = 0; 1340aa98d7cfSKaiGai Kohei 1341084702e0SKaiGai Kohei down_write(&c->xattr_sem); 1342aa98d7cfSKaiGai Kohei BUG_ON(!ref->node); 1343aa98d7cfSKaiGai Kohei 1344c9f700f8SKaiGai Kohei if (ref->node != raw) 1345c9f700f8SKaiGai Kohei goto out; 1346c9f700f8SKaiGai Kohei if (is_xattr_ref_dead(ref) && (raw->next_in_ino == (void *)ref)) 1347084702e0SKaiGai Kohei goto out; 1348084702e0SKaiGai Kohei 1349c9f700f8SKaiGai Kohei old_ofs = ref_offset(ref->node); 1350c9f700f8SKaiGai Kohei totlen = ref_totlen(c, c->gcblock, ref->node); 1351c9f700f8SKaiGai Kohei 13529fe4854cSDavid Woodhouse rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XREF_SIZE); 1353c9f700f8SKaiGai Kohei if (rc) { 1354c9f700f8SKaiGai Kohei JFFS2_WARNING("%s: jffs2_reserve_space_gc() = %d, request = %u\n", 1355aa98d7cfSKaiGai Kohei __FUNCTION__, rc, totlen); 1356084702e0SKaiGai Kohei rc = rc ? rc : -EBADFD; 1357084702e0SKaiGai Kohei goto out; 1358aa98d7cfSKaiGai Kohei } 13599fe4854cSDavid Woodhouse rc = save_xattr_ref(c, ref); 1360aa98d7cfSKaiGai Kohei if (!rc) 1361aa98d7cfSKaiGai Kohei dbg_xattr("xref (ino=%u, xid=%u) GC'ed from %#08x to %08x\n", 1362aa98d7cfSKaiGai Kohei ref->ic->ino, ref->xd->xid, old_ofs, ref_offset(ref->node)); 1363084702e0SKaiGai Kohei out: 1364c9f700f8SKaiGai Kohei if (!rc) 1365c9f700f8SKaiGai Kohei jffs2_mark_node_obsolete(c, raw); 1366084702e0SKaiGai Kohei up_write(&c->xattr_sem); 1367aa98d7cfSKaiGai Kohei return rc; 1368aa98d7cfSKaiGai Kohei } 1369aa98d7cfSKaiGai Kohei 1370aa98d7cfSKaiGai Kohei int jffs2_verify_xattr(struct jffs2_sb_info *c) 1371aa98d7cfSKaiGai Kohei { 1372aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 1373c9f700f8SKaiGai Kohei struct jffs2_eraseblock *jeb; 1374c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 1375c9f700f8SKaiGai Kohei uint32_t totlen; 1376aa98d7cfSKaiGai Kohei int rc; 1377aa98d7cfSKaiGai Kohei 1378aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1379aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) { 1380aa98d7cfSKaiGai Kohei rc = do_verify_xattr_datum(c, xd); 1381c9f700f8SKaiGai Kohei if (rc < 0) 1382c9f700f8SKaiGai Kohei continue; 1383aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 1384c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 1385c9f700f8SKaiGai Kohei for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { 1386c9f700f8SKaiGai Kohei if (ref_flags(raw) != REF_UNCHECKED) 1387c9f700f8SKaiGai Kohei continue; 1388c9f700f8SKaiGai Kohei jeb = &c->blocks[ref_offset(raw) / c->sector_size]; 1389c9f700f8SKaiGai Kohei totlen = PAD(ref_totlen(c, jeb, raw)); 1390c9f700f8SKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 1391c9f700f8SKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 1392c9f700f8SKaiGai Kohei raw->flash_offset = ref_offset(raw) 1393c9f700f8SKaiGai Kohei | ((xd->node == (void *)raw) ? REF_PRISTINE : REF_NORMAL); 1394aa98d7cfSKaiGai Kohei } 1395c9f700f8SKaiGai Kohei if (is_xattr_datum_dead(xd)) 1396c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_dead_list); 1397c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 1398aa98d7cfSKaiGai Kohei } 1399aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1400aa98d7cfSKaiGai Kohei return list_empty(&c->xattr_unchecked) ? 1 : 0; 1401aa98d7cfSKaiGai Kohei } 1402c9f700f8SKaiGai Kohei 1403c9f700f8SKaiGai Kohei void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 1404c9f700f8SKaiGai Kohei { 1405c9f700f8SKaiGai Kohei /* must be called under spin_lock(&c->erase_completion_lock) */ 1406c9f700f8SKaiGai Kohei if (xd->node != (void *)xd) 1407c9f700f8SKaiGai Kohei return; 1408c9f700f8SKaiGai Kohei 1409c9f700f8SKaiGai Kohei list_del(&xd->xindex); 1410c9f700f8SKaiGai Kohei jffs2_free_xattr_datum(xd); 1411c9f700f8SKaiGai Kohei } 1412c9f700f8SKaiGai Kohei 1413c9f700f8SKaiGai Kohei void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 1414c9f700f8SKaiGai Kohei { 1415c9f700f8SKaiGai Kohei /* must be called under spin_lock(&c->erase_completion_lock) */ 1416c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *tmp, **ptmp; 1417c9f700f8SKaiGai Kohei 1418c9f700f8SKaiGai Kohei if (ref->node != (void *)ref) 1419c9f700f8SKaiGai Kohei return; 1420c9f700f8SKaiGai Kohei 1421c9f700f8SKaiGai Kohei for (tmp=c->xref_dead_list, ptmp=&c->xref_dead_list; tmp; ptmp=&tmp->next, tmp=tmp->next) { 1422c9f700f8SKaiGai Kohei if (ref == tmp) { 1423c9f700f8SKaiGai Kohei *ptmp = tmp->next; 1424c9f700f8SKaiGai Kohei jffs2_free_xattr_ref(ref); 1425c9f700f8SKaiGai Kohei break; 1426c9f700f8SKaiGai Kohei } 1427c9f700f8SKaiGai Kohei } 1428c9f700f8SKaiGai Kohei } 1429