1652ecc20SKaiGai Kohei /* 2652ecc20SKaiGai Kohei * JFFS2 -- Journalling Flash File System, Version 2. 3aa98d7cfSKaiGai Kohei * 4c00c310eSDavid Woodhouse * Copyright © 2006 NEC Corporation 5aa98d7cfSKaiGai Kohei * 6652ecc20SKaiGai Kohei * Created by KaiGai Kohei <kaigai@ak.jp.nec.com> 7652ecc20SKaiGai Kohei * 8652ecc20SKaiGai Kohei * For licensing information, see the file 'LICENCE' in this directory. 9652ecc20SKaiGai Kohei * 10652ecc20SKaiGai Kohei */ 11c00c310eSDavid Woodhouse 129bbf29e4SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 139bbf29e4SJoe Perches 149824f75dSJean-Christophe DUBOIS #define JFFS2_XATTR_IS_CORRUPTED 1 159824f75dSJean-Christophe DUBOIS 16aa98d7cfSKaiGai Kohei #include <linux/kernel.h> 17aa98d7cfSKaiGai Kohei #include <linux/slab.h> 18aa98d7cfSKaiGai Kohei #include <linux/fs.h> 19aa98d7cfSKaiGai Kohei #include <linux/time.h> 20aa98d7cfSKaiGai Kohei #include <linux/pagemap.h> 21aa98d7cfSKaiGai Kohei #include <linux/highmem.h> 22aa98d7cfSKaiGai Kohei #include <linux/crc32.h> 23aa98d7cfSKaiGai Kohei #include <linux/jffs2.h> 24aa98d7cfSKaiGai Kohei #include <linux/xattr.h> 25f2963d45SChristoph Hellwig #include <linux/posix_acl_xattr.h> 26aa98d7cfSKaiGai Kohei #include <linux/mtd/mtd.h> 27aa98d7cfSKaiGai Kohei #include "nodelist.h" 28aa98d7cfSKaiGai Kohei /* -------- xdatum related functions ---------------- 29aa98d7cfSKaiGai Kohei * xattr_datum_hashkey(xprefix, xname, xvalue, xsize) 30aa98d7cfSKaiGai Kohei * is used to calcurate xdatum hashkey. The reminder of hashkey into XATTRINDEX_HASHSIZE is 31aa98d7cfSKaiGai Kohei * the index of the xattr name/value pair cache (c->xattrindex). 32c9f700f8SKaiGai Kohei * is_xattr_datum_unchecked(c, xd) 33c9f700f8SKaiGai Kohei * returns 1, if xdatum contains any unchecked raw nodes. if all raw nodes are not 34c9f700f8SKaiGai Kohei * unchecked, it returns 0. 35aa98d7cfSKaiGai Kohei * unload_xattr_datum(c, xd) 36aa98d7cfSKaiGai Kohei * is used to release xattr name/value pair and detach from c->xattrindex. 37aa98d7cfSKaiGai Kohei * reclaim_xattr_datum(c) 38aa98d7cfSKaiGai Kohei * is used to reclaim xattr name/value pairs on the xattr name/value pair cache when 39af901ca1SAndré Goddard Rosa * memory usage by cache is over c->xdatum_mem_threshold. Currently, this threshold 40aa98d7cfSKaiGai Kohei * is hard coded as 32KiB. 41aa98d7cfSKaiGai Kohei * do_verify_xattr_datum(c, xd) 42aa98d7cfSKaiGai Kohei * is used to load the xdatum informations without name/value pair from the medium. 43aa98d7cfSKaiGai Kohei * It's necessary once, because those informations are not collected during mounting 44aa98d7cfSKaiGai Kohei * process when EBS is enabled. 45aa98d7cfSKaiGai Kohei * 0 will be returned, if success. An negative return value means recoverable error, and 46aa98d7cfSKaiGai Kohei * positive return value means unrecoverable error. Thus, caller must remove this xdatum 47aa98d7cfSKaiGai Kohei * and xref when it returned positive value. 48aa98d7cfSKaiGai Kohei * do_load_xattr_datum(c, xd) 49aa98d7cfSKaiGai Kohei * is used to load name/value pair from the medium. 50aa98d7cfSKaiGai Kohei * The meanings of return value is same as do_verify_xattr_datum(). 51aa98d7cfSKaiGai Kohei * load_xattr_datum(c, xd) 52aa98d7cfSKaiGai Kohei * is used to be as a wrapper of do_verify_xattr_datum() and do_load_xattr_datum(). 53aa98d7cfSKaiGai Kohei * If xd need to call do_verify_xattr_datum() at first, it's called before calling 54aa98d7cfSKaiGai Kohei * do_load_xattr_datum(). The meanings of return value is same as do_verify_xattr_datum(). 559fe4854cSDavid Woodhouse * save_xattr_datum(c, xd) 56aa98d7cfSKaiGai Kohei * is used to write xdatum to medium. xd->version will be incremented. 579fe4854cSDavid Woodhouse * create_xattr_datum(c, xprefix, xname, xvalue, xsize) 58aa98d7cfSKaiGai Kohei * is used to create new xdatum and write to medium. 59c6e8c6ccSKaiGai Kohei * unrefer_xattr_datum(c, xd) 60c6e8c6ccSKaiGai Kohei * is used to delete a xdatum. When nobody refers this xdatum, JFFS2_XFLAGS_DEAD 61c6e8c6ccSKaiGai Kohei * is set on xd->flags and chained xattr_dead_list or release it immediately. 62c6e8c6ccSKaiGai Kohei * In the first case, the garbage collector release it later. 63aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 64aa98d7cfSKaiGai Kohei static uint32_t xattr_datum_hashkey(int xprefix, const char *xname, const char *xvalue, int xsize) 65aa98d7cfSKaiGai Kohei { 66aa98d7cfSKaiGai Kohei int name_len = strlen(xname); 67aa98d7cfSKaiGai Kohei 68aa98d7cfSKaiGai Kohei return crc32(xprefix, xname, name_len) ^ crc32(xprefix, xvalue, xsize); 69aa98d7cfSKaiGai Kohei } 70aa98d7cfSKaiGai Kohei 71c9f700f8SKaiGai Kohei static int is_xattr_datum_unchecked(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 72c9f700f8SKaiGai Kohei { 73c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 74c9f700f8SKaiGai Kohei int rc = 0; 75c9f700f8SKaiGai Kohei 76c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 77c9f700f8SKaiGai Kohei for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { 78c9f700f8SKaiGai Kohei if (ref_flags(raw) == REF_UNCHECKED) { 79c9f700f8SKaiGai Kohei rc = 1; 80c9f700f8SKaiGai Kohei break; 81c9f700f8SKaiGai Kohei } 82c9f700f8SKaiGai Kohei } 83c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 84c9f700f8SKaiGai Kohei return rc; 85c9f700f8SKaiGai Kohei } 86c9f700f8SKaiGai Kohei 87aa98d7cfSKaiGai Kohei static void unload_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 88aa98d7cfSKaiGai Kohei { 89aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 908e24eea7SHarvey Harrison D1(dbg_xattr("%s: xid=%u, version=%u\n", __func__, xd->xid, xd->version)); 91aa98d7cfSKaiGai Kohei if (xd->xname) { 92aa98d7cfSKaiGai Kohei c->xdatum_mem_usage -= (xd->name_len + 1 + xd->value_len); 93aa98d7cfSKaiGai Kohei kfree(xd->xname); 94aa98d7cfSKaiGai Kohei } 95aa98d7cfSKaiGai Kohei 96aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 97aa98d7cfSKaiGai Kohei xd->hashkey = 0; 98aa98d7cfSKaiGai Kohei xd->xname = NULL; 99aa98d7cfSKaiGai Kohei xd->xvalue = NULL; 100aa98d7cfSKaiGai Kohei } 101aa98d7cfSKaiGai Kohei 102aa98d7cfSKaiGai Kohei static void reclaim_xattr_datum(struct jffs2_sb_info *c) 103aa98d7cfSKaiGai Kohei { 104aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 105aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 106aa98d7cfSKaiGai Kohei uint32_t target, before; 107aa98d7cfSKaiGai Kohei static int index = 0; 108aa98d7cfSKaiGai Kohei int count; 109aa98d7cfSKaiGai Kohei 110aa98d7cfSKaiGai Kohei if (c->xdatum_mem_threshold > c->xdatum_mem_usage) 111aa98d7cfSKaiGai Kohei return; 112aa98d7cfSKaiGai Kohei 113aa98d7cfSKaiGai Kohei before = c->xdatum_mem_usage; 114aa98d7cfSKaiGai Kohei target = c->xdatum_mem_usage * 4 / 5; /* 20% reduction */ 115aa98d7cfSKaiGai Kohei for (count = 0; count < XATTRINDEX_HASHSIZE; count++) { 116aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[index], xindex) { 117aa98d7cfSKaiGai Kohei if (xd->flags & JFFS2_XFLAGS_HOT) { 118aa98d7cfSKaiGai Kohei xd->flags &= ~JFFS2_XFLAGS_HOT; 119aa98d7cfSKaiGai Kohei } else if (!(xd->flags & JFFS2_XFLAGS_BIND)) { 120aa98d7cfSKaiGai Kohei unload_xattr_datum(c, xd); 121aa98d7cfSKaiGai Kohei } 122aa98d7cfSKaiGai Kohei if (c->xdatum_mem_usage <= target) 123aa98d7cfSKaiGai Kohei goto out; 124aa98d7cfSKaiGai Kohei } 125aa98d7cfSKaiGai Kohei index = (index+1) % XATTRINDEX_HASHSIZE; 126aa98d7cfSKaiGai Kohei } 127aa98d7cfSKaiGai Kohei out: 128aa98d7cfSKaiGai Kohei JFFS2_NOTICE("xdatum_mem_usage from %u byte to %u byte (%u byte reclaimed)\n", 129aa98d7cfSKaiGai Kohei before, c->xdatum_mem_usage, before - c->xdatum_mem_usage); 130aa98d7cfSKaiGai Kohei } 131aa98d7cfSKaiGai Kohei 132aa98d7cfSKaiGai Kohei static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 133aa98d7cfSKaiGai Kohei { 134aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 135aa98d7cfSKaiGai Kohei struct jffs2_eraseblock *jeb; 136c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 137aa98d7cfSKaiGai Kohei struct jffs2_raw_xattr rx; 138aa98d7cfSKaiGai Kohei size_t readlen; 139c9f700f8SKaiGai Kohei uint32_t crc, offset, totlen; 140aa98d7cfSKaiGai Kohei int rc; 141aa98d7cfSKaiGai Kohei 142c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 143c9f700f8SKaiGai Kohei offset = ref_offset(xd->node); 144c9f700f8SKaiGai Kohei if (ref_flags(xd->node) == REF_PRISTINE) 145c9f700f8SKaiGai Kohei goto complete; 146c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 147aa98d7cfSKaiGai Kohei 148c9f700f8SKaiGai Kohei rc = jffs2_flash_read(c, offset, sizeof(rx), &readlen, (char *)&rx); 149aa98d7cfSKaiGai Kohei if (rc || readlen != sizeof(rx)) { 15089291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu at %#08x\n", 151c9f700f8SKaiGai Kohei rc, sizeof(rx), readlen, offset); 152aa98d7cfSKaiGai Kohei return rc ? rc : -EIO; 153aa98d7cfSKaiGai Kohei } 154aa98d7cfSKaiGai Kohei crc = crc32(0, &rx, sizeof(rx) - 4); 155aa98d7cfSKaiGai Kohei if (crc != je32_to_cpu(rx.node_crc)) { 156aa98d7cfSKaiGai Kohei JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", 157c9f700f8SKaiGai Kohei offset, je32_to_cpu(rx.hdr_crc), crc); 158c9f700f8SKaiGai Kohei xd->flags |= JFFS2_XFLAGS_INVALID; 1599824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 160aa98d7cfSKaiGai Kohei } 1618a13695cSKaiGai Kohei totlen = PAD(sizeof(rx) + rx.name_len + 1 + je16_to_cpu(rx.value_len)); 162aa98d7cfSKaiGai Kohei if (je16_to_cpu(rx.magic) != JFFS2_MAGIC_BITMASK 163aa98d7cfSKaiGai Kohei || je16_to_cpu(rx.nodetype) != JFFS2_NODETYPE_XATTR 164aa98d7cfSKaiGai Kohei || je32_to_cpu(rx.totlen) != totlen 165aa98d7cfSKaiGai Kohei || je32_to_cpu(rx.xid) != xd->xid 166aa98d7cfSKaiGai Kohei || je32_to_cpu(rx.version) != xd->version) { 167aa98d7cfSKaiGai Kohei JFFS2_ERROR("inconsistent xdatum at %#08x, magic=%#04x/%#04x, " 168aa98d7cfSKaiGai Kohei "nodetype=%#04x/%#04x, totlen=%u/%u, xid=%u/%u, version=%u/%u\n", 169c9f700f8SKaiGai Kohei offset, je16_to_cpu(rx.magic), JFFS2_MAGIC_BITMASK, 170aa98d7cfSKaiGai Kohei je16_to_cpu(rx.nodetype), JFFS2_NODETYPE_XATTR, 171aa98d7cfSKaiGai Kohei je32_to_cpu(rx.totlen), totlen, 172aa98d7cfSKaiGai Kohei je32_to_cpu(rx.xid), xd->xid, 173aa98d7cfSKaiGai Kohei je32_to_cpu(rx.version), xd->version); 174c9f700f8SKaiGai Kohei xd->flags |= JFFS2_XFLAGS_INVALID; 1759824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 176aa98d7cfSKaiGai Kohei } 177aa98d7cfSKaiGai Kohei xd->xprefix = rx.xprefix; 178aa98d7cfSKaiGai Kohei xd->name_len = rx.name_len; 179aa98d7cfSKaiGai Kohei xd->value_len = je16_to_cpu(rx.value_len); 180aa98d7cfSKaiGai Kohei xd->data_crc = je32_to_cpu(rx.data_crc); 181aa98d7cfSKaiGai Kohei 182aa98d7cfSKaiGai Kohei spin_lock(&c->erase_completion_lock); 183c9f700f8SKaiGai Kohei complete: 184c9f700f8SKaiGai Kohei for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { 185c9f700f8SKaiGai Kohei jeb = &c->blocks[ref_offset(raw) / c->sector_size]; 186c9f700f8SKaiGai Kohei totlen = PAD(ref_totlen(c, jeb, raw)); 187c9f700f8SKaiGai Kohei if (ref_flags(raw) == REF_UNCHECKED) { 188aa98d7cfSKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 189aa98d7cfSKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 190c9f700f8SKaiGai Kohei } 191c9f700f8SKaiGai Kohei raw->flash_offset = ref_offset(raw) | ((xd->node==raw) ? REF_PRISTINE : REF_NORMAL); 192c9f700f8SKaiGai Kohei } 193aa98d7cfSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 194aa98d7cfSKaiGai Kohei 195aa98d7cfSKaiGai Kohei /* unchecked xdatum is chained with c->xattr_unchecked */ 196aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 197aa98d7cfSKaiGai Kohei 198aa98d7cfSKaiGai Kohei dbg_xattr("success on verfying xdatum (xid=%u, version=%u)\n", 199aa98d7cfSKaiGai Kohei xd->xid, xd->version); 200aa98d7cfSKaiGai Kohei 201aa98d7cfSKaiGai Kohei return 0; 202aa98d7cfSKaiGai Kohei } 203aa98d7cfSKaiGai Kohei 204aa98d7cfSKaiGai Kohei static int do_load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 205aa98d7cfSKaiGai Kohei { 206aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 207aa98d7cfSKaiGai Kohei char *data; 208aa98d7cfSKaiGai Kohei size_t readlen; 209aa98d7cfSKaiGai Kohei uint32_t crc, length; 210aa98d7cfSKaiGai Kohei int i, ret, retry = 0; 211aa98d7cfSKaiGai Kohei 212aa98d7cfSKaiGai Kohei BUG_ON(ref_flags(xd->node) != REF_PRISTINE); 213aa98d7cfSKaiGai Kohei BUG_ON(!list_empty(&xd->xindex)); 214aa98d7cfSKaiGai Kohei retry: 215aa98d7cfSKaiGai Kohei length = xd->name_len + 1 + xd->value_len; 216aa98d7cfSKaiGai Kohei data = kmalloc(length, GFP_KERNEL); 217aa98d7cfSKaiGai Kohei if (!data) 218aa98d7cfSKaiGai Kohei return -ENOMEM; 219aa98d7cfSKaiGai Kohei 220aa98d7cfSKaiGai Kohei ret = jffs2_flash_read(c, ref_offset(xd->node)+sizeof(struct jffs2_raw_xattr), 221aa98d7cfSKaiGai Kohei length, &readlen, data); 222aa98d7cfSKaiGai Kohei 223aa98d7cfSKaiGai Kohei if (ret || length!=readlen) { 22489291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_read() returned %d, request=%d, readlen=%zu, at %#08x\n", 225aa98d7cfSKaiGai Kohei ret, length, readlen, ref_offset(xd->node)); 226aa98d7cfSKaiGai Kohei kfree(data); 227aa98d7cfSKaiGai Kohei return ret ? ret : -EIO; 228aa98d7cfSKaiGai Kohei } 229aa98d7cfSKaiGai Kohei 230aa98d7cfSKaiGai Kohei data[xd->name_len] = '\0'; 231aa98d7cfSKaiGai Kohei crc = crc32(0, data, length); 232aa98d7cfSKaiGai Kohei if (crc != xd->data_crc) { 2339824f75dSJean-Christophe DUBOIS JFFS2_WARNING("node CRC failed (JFFS2_NODETYPE_XATTR)" 234aa98d7cfSKaiGai Kohei " at %#08x, read: 0x%08x calculated: 0x%08x\n", 235aa98d7cfSKaiGai Kohei ref_offset(xd->node), xd->data_crc, crc); 236aa98d7cfSKaiGai Kohei kfree(data); 237c9f700f8SKaiGai Kohei xd->flags |= JFFS2_XFLAGS_INVALID; 2389824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 239aa98d7cfSKaiGai Kohei } 240aa98d7cfSKaiGai Kohei 241aa98d7cfSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_HOT; 242aa98d7cfSKaiGai Kohei xd->xname = data; 243aa98d7cfSKaiGai Kohei xd->xvalue = data + xd->name_len+1; 244aa98d7cfSKaiGai Kohei 245aa98d7cfSKaiGai Kohei c->xdatum_mem_usage += length; 246aa98d7cfSKaiGai Kohei 247aa98d7cfSKaiGai Kohei xd->hashkey = xattr_datum_hashkey(xd->xprefix, xd->xname, xd->xvalue, xd->value_len); 248aa98d7cfSKaiGai Kohei i = xd->hashkey % XATTRINDEX_HASHSIZE; 249aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattrindex[i]); 250aa98d7cfSKaiGai Kohei if (!retry) { 251aa98d7cfSKaiGai Kohei retry = 1; 252aa98d7cfSKaiGai Kohei reclaim_xattr_datum(c); 253aa98d7cfSKaiGai Kohei if (!xd->xname) 254aa98d7cfSKaiGai Kohei goto retry; 255aa98d7cfSKaiGai Kohei } 256aa98d7cfSKaiGai Kohei 257aa98d7cfSKaiGai Kohei dbg_xattr("success on loading xdatum (xid=%u, xprefix=%u, xname='%s')\n", 258aa98d7cfSKaiGai Kohei xd->xid, xd->xprefix, xd->xname); 259aa98d7cfSKaiGai Kohei 260aa98d7cfSKaiGai Kohei return 0; 261aa98d7cfSKaiGai Kohei } 262aa98d7cfSKaiGai Kohei 263aa98d7cfSKaiGai Kohei static int load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 264aa98d7cfSKaiGai Kohei { 265aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem); 266aa98d7cfSKaiGai Kohei * rc < 0 : recoverable error, try again 267aa98d7cfSKaiGai Kohei * rc = 0 : success 268aa98d7cfSKaiGai Kohei * rc > 0 : Unrecoverable error, this node should be deleted. 269aa98d7cfSKaiGai Kohei */ 270aa98d7cfSKaiGai Kohei int rc = 0; 271c9f700f8SKaiGai Kohei 2728a13695cSKaiGai Kohei BUG_ON(xd->flags & JFFS2_XFLAGS_DEAD); 273c9f700f8SKaiGai Kohei if (xd->xname) 274c9f700f8SKaiGai Kohei return 0; 275c9f700f8SKaiGai Kohei if (xd->flags & JFFS2_XFLAGS_INVALID) 2769824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 277c9f700f8SKaiGai Kohei if (unlikely(is_xattr_datum_unchecked(c, xd))) 278aa98d7cfSKaiGai Kohei rc = do_verify_xattr_datum(c, xd); 279aa98d7cfSKaiGai Kohei if (!rc) 280aa98d7cfSKaiGai Kohei rc = do_load_xattr_datum(c, xd); 281aa98d7cfSKaiGai Kohei return rc; 282aa98d7cfSKaiGai Kohei } 283aa98d7cfSKaiGai Kohei 2849fe4854cSDavid Woodhouse static int save_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 285aa98d7cfSKaiGai Kohei { 286aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 2872f785402SDavid Woodhouse struct jffs2_raw_xattr rx; 288aa98d7cfSKaiGai Kohei struct kvec vecs[2]; 28989291a9dSDavid Woodhouse size_t length; 2908a13695cSKaiGai Kohei int rc, totlen; 2919fe4854cSDavid Woodhouse uint32_t phys_ofs = write_ofs(c); 292aa98d7cfSKaiGai Kohei 2938a13695cSKaiGai Kohei BUG_ON(!xd->xname); 2948a13695cSKaiGai Kohei BUG_ON(xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID)); 295aa98d7cfSKaiGai Kohei 296aa98d7cfSKaiGai Kohei vecs[0].iov_base = ℞ 2978a13695cSKaiGai Kohei vecs[0].iov_len = sizeof(rx); 298aa98d7cfSKaiGai Kohei vecs[1].iov_base = xd->xname; 299aa98d7cfSKaiGai Kohei vecs[1].iov_len = xd->name_len + 1 + xd->value_len; 3008a13695cSKaiGai Kohei totlen = vecs[0].iov_len + vecs[1].iov_len; 3018a13695cSKaiGai 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); 310aa98d7cfSKaiGai Kohei rx.version = cpu_to_je32(++xd->version); 311aa98d7cfSKaiGai Kohei rx.xprefix = xd->xprefix; 312aa98d7cfSKaiGai Kohei rx.name_len = xd->name_len; 313aa98d7cfSKaiGai Kohei rx.value_len = cpu_to_je16(xd->value_len); 314aa98d7cfSKaiGai Kohei rx.data_crc = cpu_to_je32(crc32(0, vecs[1].iov_base, vecs[1].iov_len)); 315aa98d7cfSKaiGai Kohei rx.node_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_raw_xattr) - 4)); 316aa98d7cfSKaiGai Kohei 3178a13695cSKaiGai Kohei rc = jffs2_flash_writev(c, vecs, 2, phys_ofs, &length, 0); 318aa98d7cfSKaiGai Kohei if (rc || totlen != length) { 31989291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_writev()=%d, req=%u, wrote=%zu, at %#08x\n", 320aa98d7cfSKaiGai Kohei rc, totlen, length, phys_ofs); 321aa98d7cfSKaiGai Kohei rc = rc ? rc : -EIO; 3222f785402SDavid Woodhouse if (length) 3232f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(totlen), NULL); 3242f785402SDavid Woodhouse 325aa98d7cfSKaiGai Kohei return rc; 326aa98d7cfSKaiGai Kohei } 327aa98d7cfSKaiGai Kohei /* success */ 328c9f700f8SKaiGai Kohei jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(totlen), (void *)xd); 329aa98d7cfSKaiGai Kohei 330aa98d7cfSKaiGai Kohei dbg_xattr("success on saving xdatum (xid=%u, version=%u, xprefix=%u, xname='%s')\n", 331aa98d7cfSKaiGai Kohei xd->xid, xd->version, xd->xprefix, xd->xname); 332aa98d7cfSKaiGai Kohei 333aa98d7cfSKaiGai Kohei return 0; 334aa98d7cfSKaiGai Kohei } 335aa98d7cfSKaiGai Kohei 336aa98d7cfSKaiGai Kohei static struct jffs2_xattr_datum *create_xattr_datum(struct jffs2_sb_info *c, 337aa98d7cfSKaiGai Kohei int xprefix, const char *xname, 3389fe4854cSDavid Woodhouse const char *xvalue, int xsize) 339aa98d7cfSKaiGai Kohei { 340aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 341aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 342aa98d7cfSKaiGai Kohei uint32_t hashkey, name_len; 343aa98d7cfSKaiGai Kohei char *data; 344aa98d7cfSKaiGai Kohei int i, rc; 345aa98d7cfSKaiGai Kohei 346aa98d7cfSKaiGai Kohei /* Search xattr_datum has same xname/xvalue by index */ 347aa98d7cfSKaiGai Kohei hashkey = xattr_datum_hashkey(xprefix, xname, xvalue, xsize); 348aa98d7cfSKaiGai Kohei i = hashkey % XATTRINDEX_HASHSIZE; 349aa98d7cfSKaiGai Kohei list_for_each_entry(xd, &c->xattrindex[i], xindex) { 350aa98d7cfSKaiGai Kohei if (xd->hashkey==hashkey 351aa98d7cfSKaiGai Kohei && xd->xprefix==xprefix 352aa98d7cfSKaiGai Kohei && xd->value_len==xsize 353aa98d7cfSKaiGai Kohei && !strcmp(xd->xname, xname) 354aa98d7cfSKaiGai Kohei && !memcmp(xd->xvalue, xvalue, xsize)) { 3552c887e23SKaiGai Kohei atomic_inc(&xd->refcnt); 356aa98d7cfSKaiGai Kohei return xd; 357aa98d7cfSKaiGai Kohei } 358aa98d7cfSKaiGai Kohei } 359aa98d7cfSKaiGai Kohei 360aa98d7cfSKaiGai Kohei /* Not found, Create NEW XATTR-Cache */ 361aa98d7cfSKaiGai Kohei name_len = strlen(xname); 362aa98d7cfSKaiGai Kohei 363aa98d7cfSKaiGai Kohei xd = jffs2_alloc_xattr_datum(); 364aa98d7cfSKaiGai Kohei if (!xd) 365aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 366aa98d7cfSKaiGai Kohei 367aa98d7cfSKaiGai Kohei data = kmalloc(name_len + 1 + xsize, GFP_KERNEL); 368aa98d7cfSKaiGai Kohei if (!data) { 369aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 370aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 371aa98d7cfSKaiGai Kohei } 372aa98d7cfSKaiGai Kohei strcpy(data, xname); 373aa98d7cfSKaiGai Kohei memcpy(data + name_len + 1, xvalue, xsize); 374aa98d7cfSKaiGai Kohei 3752c887e23SKaiGai Kohei atomic_set(&xd->refcnt, 1); 376aa98d7cfSKaiGai Kohei xd->xid = ++c->highest_xid; 377aa98d7cfSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_HOT; 378aa98d7cfSKaiGai Kohei xd->xprefix = xprefix; 379aa98d7cfSKaiGai Kohei 380aa98d7cfSKaiGai Kohei xd->hashkey = hashkey; 381aa98d7cfSKaiGai Kohei xd->xname = data; 382aa98d7cfSKaiGai Kohei xd->xvalue = data + name_len + 1; 383aa98d7cfSKaiGai Kohei xd->name_len = name_len; 384aa98d7cfSKaiGai Kohei xd->value_len = xsize; 385aa98d7cfSKaiGai Kohei xd->data_crc = crc32(0, data, xd->name_len + 1 + xd->value_len); 386aa98d7cfSKaiGai Kohei 3879fe4854cSDavid Woodhouse rc = save_xattr_datum(c, xd); 388aa98d7cfSKaiGai Kohei if (rc) { 389aa98d7cfSKaiGai Kohei kfree(xd->xname); 390aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 391aa98d7cfSKaiGai Kohei return ERR_PTR(rc); 392aa98d7cfSKaiGai Kohei } 393aa98d7cfSKaiGai Kohei 394aa98d7cfSKaiGai Kohei /* Insert Hash Index */ 395aa98d7cfSKaiGai Kohei i = hashkey % XATTRINDEX_HASHSIZE; 396aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattrindex[i]); 397aa98d7cfSKaiGai Kohei 398aa98d7cfSKaiGai Kohei c->xdatum_mem_usage += (xd->name_len + 1 + xd->value_len); 399aa98d7cfSKaiGai Kohei reclaim_xattr_datum(c); 400aa98d7cfSKaiGai Kohei 401aa98d7cfSKaiGai Kohei return xd; 402aa98d7cfSKaiGai Kohei } 403aa98d7cfSKaiGai Kohei 404c6e8c6ccSKaiGai Kohei static void unrefer_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 405c9f700f8SKaiGai Kohei { 406c9f700f8SKaiGai Kohei /* must be called under down_write(xattr_sem) */ 407c6e8c6ccSKaiGai Kohei if (atomic_dec_and_lock(&xd->refcnt, &c->erase_completion_lock)) { 408c9f700f8SKaiGai Kohei unload_xattr_datum(c, xd); 4098a13695cSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_DEAD; 4108a13695cSKaiGai Kohei if (xd->node == (void *)xd) { 4118a13695cSKaiGai Kohei BUG_ON(!(xd->flags & JFFS2_XFLAGS_INVALID)); 4128a13695cSKaiGai Kohei jffs2_free_xattr_datum(xd); 4138a13695cSKaiGai Kohei } else { 414c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_dead_list); 415c9f700f8SKaiGai Kohei } 416c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 417c6e8c6ccSKaiGai Kohei 418a6b1d82dSJeff Garzik dbg_xattr("xdatum(xid=%u, version=%u) was removed.\n", 419a6b1d82dSJeff Garzik xd->xid, xd->version); 420c6e8c6ccSKaiGai Kohei } 421c9f700f8SKaiGai Kohei } 422c9f700f8SKaiGai Kohei 42321b9879bSKaiGai Kohei /* -------- xref related functions ------------------ 424aa98d7cfSKaiGai Kohei * verify_xattr_ref(c, ref) 425aa98d7cfSKaiGai Kohei * is used to load xref information from medium. Because summary data does not 426aa98d7cfSKaiGai Kohei * contain xid/ino, it's necessary to verify once while mounting process. 4279fe4854cSDavid Woodhouse * save_xattr_ref(c, ref) 4288a13695cSKaiGai Kohei * is used to write xref to medium. If delete marker is marked, it write 4298a13695cSKaiGai Kohei * a delete marker of xref into medium. 4309fe4854cSDavid Woodhouse * create_xattr_ref(c, ic, xd) 431aa98d7cfSKaiGai Kohei * is used to create a new xref and write to medium. 4328a13695cSKaiGai Kohei * delete_xattr_ref(c, ref) 4338a13695cSKaiGai Kohei * is used to delete jffs2_xattr_ref. It marks xref XREF_DELETE_MARKER, 4348a13695cSKaiGai Kohei * and allows GC to reclaim those physical nodes. 435aa98d7cfSKaiGai Kohei * jffs2_xattr_delete_inode(c, ic) 436aa98d7cfSKaiGai Kohei * is called to remove xrefs related to obsolete inode when inode is unlinked. 437aa98d7cfSKaiGai Kohei * jffs2_xattr_free_inode(c, ic) 438aa98d7cfSKaiGai Kohei * is called to release xattr related objects when unmounting. 4398f2b6f49SKaiGai Kohei * check_xattr_ref_inode(c, ic) 440aa98d7cfSKaiGai Kohei * is used to confirm inode does not have duplicate xattr name/value pair. 4418c5a0366SJean-Christophe DUBOIS * jffs2_xattr_do_crccheck_inode(c, ic) 4428c5a0366SJean-Christophe DUBOIS * is used to force xattr data integrity check during the initial gc scan. 443aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 444aa98d7cfSKaiGai Kohei static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 445aa98d7cfSKaiGai Kohei { 446aa98d7cfSKaiGai Kohei struct jffs2_eraseblock *jeb; 447c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 448aa98d7cfSKaiGai Kohei struct jffs2_raw_xref rr; 449aa98d7cfSKaiGai Kohei size_t readlen; 450c9f700f8SKaiGai Kohei uint32_t crc, offset, totlen; 451aa98d7cfSKaiGai Kohei int rc; 452aa98d7cfSKaiGai Kohei 453c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 454c9f700f8SKaiGai Kohei if (ref_flags(ref->node) != REF_UNCHECKED) 455c9f700f8SKaiGai Kohei goto complete; 456c9f700f8SKaiGai Kohei offset = ref_offset(ref->node); 457c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 458aa98d7cfSKaiGai Kohei 459c9f700f8SKaiGai Kohei rc = jffs2_flash_read(c, offset, sizeof(rr), &readlen, (char *)&rr); 460aa98d7cfSKaiGai Kohei if (rc || sizeof(rr) != readlen) { 46189291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu, at %#08x\n", 462c9f700f8SKaiGai Kohei rc, sizeof(rr), readlen, offset); 463aa98d7cfSKaiGai Kohei return rc ? rc : -EIO; 464aa98d7cfSKaiGai Kohei } 465aa98d7cfSKaiGai Kohei /* obsolete node */ 466aa98d7cfSKaiGai Kohei crc = crc32(0, &rr, sizeof(rr) - 4); 467aa98d7cfSKaiGai Kohei if (crc != je32_to_cpu(rr.node_crc)) { 468aa98d7cfSKaiGai Kohei JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x\n", 469c9f700f8SKaiGai Kohei offset, je32_to_cpu(rr.node_crc), crc); 4709824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 471aa98d7cfSKaiGai Kohei } 472aa98d7cfSKaiGai Kohei if (je16_to_cpu(rr.magic) != JFFS2_MAGIC_BITMASK 473aa98d7cfSKaiGai Kohei || je16_to_cpu(rr.nodetype) != JFFS2_NODETYPE_XREF 474aa98d7cfSKaiGai Kohei || je32_to_cpu(rr.totlen) != PAD(sizeof(rr))) { 475aa98d7cfSKaiGai Kohei JFFS2_ERROR("inconsistent xref at %#08x, magic=%#04x/%#04x, " 47689291a9dSDavid Woodhouse "nodetype=%#04x/%#04x, totlen=%u/%zu\n", 477c9f700f8SKaiGai Kohei offset, je16_to_cpu(rr.magic), JFFS2_MAGIC_BITMASK, 478aa98d7cfSKaiGai Kohei je16_to_cpu(rr.nodetype), JFFS2_NODETYPE_XREF, 479aa98d7cfSKaiGai Kohei je32_to_cpu(rr.totlen), PAD(sizeof(rr))); 4809824f75dSJean-Christophe DUBOIS return JFFS2_XATTR_IS_CORRUPTED; 481aa98d7cfSKaiGai Kohei } 482aa98d7cfSKaiGai Kohei ref->ino = je32_to_cpu(rr.ino); 483aa98d7cfSKaiGai Kohei ref->xid = je32_to_cpu(rr.xid); 484c9f700f8SKaiGai Kohei ref->xseqno = je32_to_cpu(rr.xseqno); 485c9f700f8SKaiGai Kohei if (ref->xseqno > c->highest_xseqno) 486c9f700f8SKaiGai Kohei c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER); 487aa98d7cfSKaiGai Kohei 488aa98d7cfSKaiGai Kohei spin_lock(&c->erase_completion_lock); 489c9f700f8SKaiGai Kohei complete: 490c9f700f8SKaiGai Kohei for (raw=ref->node; raw != (void *)ref; raw=raw->next_in_ino) { 491c9f700f8SKaiGai Kohei jeb = &c->blocks[ref_offset(raw) / c->sector_size]; 492c9f700f8SKaiGai Kohei totlen = PAD(ref_totlen(c, jeb, raw)); 493c9f700f8SKaiGai Kohei if (ref_flags(raw) == REF_UNCHECKED) { 494aa98d7cfSKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 495aa98d7cfSKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 496c9f700f8SKaiGai Kohei } 497c9f700f8SKaiGai Kohei raw->flash_offset = ref_offset(raw) | ((ref->node==raw) ? REF_PRISTINE : REF_NORMAL); 498c9f700f8SKaiGai Kohei } 499aa98d7cfSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 500aa98d7cfSKaiGai Kohei 501aa98d7cfSKaiGai Kohei dbg_xattr("success on verifying xref (ino=%u, xid=%u) at %#08x\n", 502aa98d7cfSKaiGai Kohei ref->ino, ref->xid, ref_offset(ref->node)); 503aa98d7cfSKaiGai Kohei return 0; 504aa98d7cfSKaiGai Kohei } 505aa98d7cfSKaiGai Kohei 5069fe4854cSDavid Woodhouse static int save_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 507aa98d7cfSKaiGai Kohei { 508aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 509aa98d7cfSKaiGai Kohei struct jffs2_raw_xref rr; 51089291a9dSDavid Woodhouse size_t length; 511c9f700f8SKaiGai Kohei uint32_t xseqno, phys_ofs = write_ofs(c); 512aa98d7cfSKaiGai Kohei int ret; 513aa98d7cfSKaiGai Kohei 514aa98d7cfSKaiGai Kohei rr.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 515aa98d7cfSKaiGai Kohei rr.nodetype = cpu_to_je16(JFFS2_NODETYPE_XREF); 516aa98d7cfSKaiGai Kohei rr.totlen = cpu_to_je32(PAD(sizeof(rr))); 517aa98d7cfSKaiGai Kohei rr.hdr_crc = cpu_to_je32(crc32(0, &rr, sizeof(struct jffs2_unknown_node) - 4)); 518aa98d7cfSKaiGai Kohei 519c9f700f8SKaiGai Kohei xseqno = (c->highest_xseqno += 2); 520c9f700f8SKaiGai Kohei if (is_xattr_ref_dead(ref)) { 521c9f700f8SKaiGai Kohei xseqno |= XREF_DELETE_MARKER; 522c9f700f8SKaiGai Kohei rr.ino = cpu_to_je32(ref->ino); 523c9f700f8SKaiGai Kohei rr.xid = cpu_to_je32(ref->xid); 524c9f700f8SKaiGai Kohei } else { 525aa98d7cfSKaiGai Kohei rr.ino = cpu_to_je32(ref->ic->ino); 526aa98d7cfSKaiGai Kohei rr.xid = cpu_to_je32(ref->xd->xid); 527c9f700f8SKaiGai Kohei } 528c9f700f8SKaiGai Kohei rr.xseqno = cpu_to_je32(xseqno); 529aa98d7cfSKaiGai Kohei rr.node_crc = cpu_to_je32(crc32(0, &rr, sizeof(rr) - 4)); 530aa98d7cfSKaiGai Kohei 531aa98d7cfSKaiGai Kohei ret = jffs2_flash_write(c, phys_ofs, sizeof(rr), &length, (char *)&rr); 532aa98d7cfSKaiGai Kohei if (ret || sizeof(rr) != length) { 53389291a9dSDavid Woodhouse JFFS2_WARNING("jffs2_flash_write() returned %d, request=%zu, retlen=%zu, at %#08x\n", 534aa98d7cfSKaiGai Kohei ret, sizeof(rr), length, phys_ofs); 535aa98d7cfSKaiGai Kohei ret = ret ? ret : -EIO; 5362f785402SDavid Woodhouse if (length) 5372f785402SDavid Woodhouse jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(sizeof(rr)), NULL); 5382f785402SDavid Woodhouse 539aa98d7cfSKaiGai Kohei return ret; 540aa98d7cfSKaiGai Kohei } 541c9f700f8SKaiGai Kohei /* success */ 542c9f700f8SKaiGai Kohei ref->xseqno = xseqno; 543c9f700f8SKaiGai Kohei jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(sizeof(rr)), (void *)ref); 544aa98d7cfSKaiGai Kohei 545aa98d7cfSKaiGai Kohei dbg_xattr("success on saving xref (ino=%u, xid=%u)\n", ref->ic->ino, ref->xd->xid); 546aa98d7cfSKaiGai Kohei 547aa98d7cfSKaiGai Kohei return 0; 548aa98d7cfSKaiGai Kohei } 549aa98d7cfSKaiGai Kohei 550aa98d7cfSKaiGai Kohei static struct jffs2_xattr_ref *create_xattr_ref(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, 5519fe4854cSDavid Woodhouse struct jffs2_xattr_datum *xd) 552aa98d7cfSKaiGai Kohei { 553aa98d7cfSKaiGai Kohei /* must be called under down_write(xattr_sem) */ 554aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref; 555aa98d7cfSKaiGai Kohei int ret; 556aa98d7cfSKaiGai Kohei 557aa98d7cfSKaiGai Kohei ref = jffs2_alloc_xattr_ref(); 558aa98d7cfSKaiGai Kohei if (!ref) 559aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 560aa98d7cfSKaiGai Kohei ref->ic = ic; 561aa98d7cfSKaiGai Kohei ref->xd = xd; 562aa98d7cfSKaiGai Kohei 5639fe4854cSDavid Woodhouse ret = save_xattr_ref(c, ref); 564aa98d7cfSKaiGai Kohei if (ret) { 565aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 566aa98d7cfSKaiGai Kohei return ERR_PTR(ret); 567aa98d7cfSKaiGai Kohei } 568aa98d7cfSKaiGai Kohei 569aa98d7cfSKaiGai Kohei /* Chain to inode */ 5708f2b6f49SKaiGai Kohei ref->next = ic->xref; 5718f2b6f49SKaiGai Kohei ic->xref = ref; 572aa98d7cfSKaiGai Kohei 573aa98d7cfSKaiGai Kohei return ref; /* success */ 574aa98d7cfSKaiGai Kohei } 575aa98d7cfSKaiGai Kohei 5768a13695cSKaiGai Kohei static void delete_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 577c9f700f8SKaiGai Kohei { 578c9f700f8SKaiGai Kohei /* must be called under down_write(xattr_sem) */ 579c9f700f8SKaiGai Kohei struct jffs2_xattr_datum *xd; 580c9f700f8SKaiGai Kohei 581c9f700f8SKaiGai Kohei xd = ref->xd; 5828a13695cSKaiGai Kohei ref->xseqno |= XREF_DELETE_MARKER; 583c9f700f8SKaiGai Kohei ref->ino = ref->ic->ino; 584c9f700f8SKaiGai Kohei ref->xid = ref->xd->xid; 585c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 586c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 587c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 588c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 589c9f700f8SKaiGai Kohei 5908a13695cSKaiGai Kohei dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) was removed.\n", 5918a13695cSKaiGai Kohei ref->ino, ref->xid, ref->xseqno); 592c9f700f8SKaiGai Kohei 593c6e8c6ccSKaiGai Kohei unrefer_xattr_datum(c, xd); 594c9f700f8SKaiGai Kohei } 595c9f700f8SKaiGai Kohei 596aa98d7cfSKaiGai Kohei void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 597aa98d7cfSKaiGai Kohei { 598b57922d9SAl Viro /* It's called from jffs2_evict_inode() on inode removing. 599aa98d7cfSKaiGai Kohei When an inode with XATTR is removed, those XATTRs must be removed. */ 6008a13695cSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 601aa98d7cfSKaiGai Kohei 60227c72b04SDavid Woodhouse if (!ic || ic->pino_nlink > 0) 603aa98d7cfSKaiGai Kohei return; 604aa98d7cfSKaiGai Kohei 605c9f700f8SKaiGai Kohei down_write(&c->xattr_sem); 6068a13695cSKaiGai Kohei for (ref = ic->xref; ref; ref = _ref) { 6078a13695cSKaiGai Kohei _ref = ref->next; 6088a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 609c9f700f8SKaiGai Kohei } 6108a13695cSKaiGai Kohei ic->xref = NULL; 611aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 612aa98d7cfSKaiGai Kohei } 613aa98d7cfSKaiGai Kohei 614aa98d7cfSKaiGai Kohei void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 615aa98d7cfSKaiGai Kohei { 616aa98d7cfSKaiGai Kohei /* It's called from jffs2_free_ino_caches() until unmounting FS. */ 617aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 618aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 619aa98d7cfSKaiGai Kohei 620aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 6218f2b6f49SKaiGai Kohei for (ref = ic->xref; ref; ref = _ref) { 6228f2b6f49SKaiGai Kohei _ref = ref->next; 623aa98d7cfSKaiGai Kohei xd = ref->xd; 6242c887e23SKaiGai Kohei if (atomic_dec_and_test(&xd->refcnt)) { 625aa98d7cfSKaiGai Kohei unload_xattr_datum(c, xd); 626aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 627aa98d7cfSKaiGai Kohei } 628aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 629aa98d7cfSKaiGai Kohei } 6308f2b6f49SKaiGai Kohei ic->xref = NULL; 631aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 632aa98d7cfSKaiGai Kohei } 633aa98d7cfSKaiGai Kohei 6348f2b6f49SKaiGai Kohei static int check_xattr_ref_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 635aa98d7cfSKaiGai Kohei { 636a4ce96acSLinus Torvalds /* success of check_xattr_ref_inode() means that inode (ic) dose not have 637aa98d7cfSKaiGai Kohei * duplicate name/value pairs. If duplicate name/value pair would be found, 638aa98d7cfSKaiGai Kohei * one will be removed. 639aa98d7cfSKaiGai Kohei */ 640c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *ref, *cmp, **pref, **pcmp; 641aa98d7cfSKaiGai Kohei int rc = 0; 642aa98d7cfSKaiGai Kohei 643aa98d7cfSKaiGai Kohei if (likely(ic->flags & INO_FLAGS_XATTR_CHECKED)) 644aa98d7cfSKaiGai Kohei return 0; 645aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 646aa98d7cfSKaiGai Kohei retry: 647aa98d7cfSKaiGai Kohei rc = 0; 6488f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 649aa98d7cfSKaiGai Kohei if (!ref->xd->xname) { 650aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, ref->xd); 651aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 6528f2b6f49SKaiGai Kohei *pref = ref->next; 6538a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 654aa98d7cfSKaiGai Kohei goto retry; 655aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 656aa98d7cfSKaiGai Kohei goto out; 657aa98d7cfSKaiGai Kohei } 658c9f700f8SKaiGai Kohei for (cmp=ref->next, pcmp=&ref->next; cmp; pcmp=&cmp->next, cmp=cmp->next) { 659aa98d7cfSKaiGai Kohei if (!cmp->xd->xname) { 660aa98d7cfSKaiGai Kohei ref->xd->flags |= JFFS2_XFLAGS_BIND; 661aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, cmp->xd); 662aa98d7cfSKaiGai Kohei ref->xd->flags &= ~JFFS2_XFLAGS_BIND; 663aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 664c9f700f8SKaiGai Kohei *pcmp = cmp->next; 6658a13695cSKaiGai Kohei delete_xattr_ref(c, cmp); 666aa98d7cfSKaiGai Kohei goto retry; 667aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 668aa98d7cfSKaiGai Kohei goto out; 669aa98d7cfSKaiGai Kohei } 670aa98d7cfSKaiGai Kohei if (ref->xd->xprefix == cmp->xd->xprefix 671aa98d7cfSKaiGai Kohei && !strcmp(ref->xd->xname, cmp->xd->xname)) { 672c9f700f8SKaiGai Kohei if (ref->xseqno > cmp->xseqno) { 673c9f700f8SKaiGai Kohei *pcmp = cmp->next; 6748a13695cSKaiGai Kohei delete_xattr_ref(c, cmp); 675c9f700f8SKaiGai Kohei } else { 676c9f700f8SKaiGai Kohei *pref = ref->next; 6778a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 678c9f700f8SKaiGai Kohei } 679aa98d7cfSKaiGai Kohei goto retry; 680aa98d7cfSKaiGai Kohei } 681aa98d7cfSKaiGai Kohei } 682aa98d7cfSKaiGai Kohei } 683aa98d7cfSKaiGai Kohei ic->flags |= INO_FLAGS_XATTR_CHECKED; 684aa98d7cfSKaiGai Kohei out: 685aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 686aa98d7cfSKaiGai Kohei 687aa98d7cfSKaiGai Kohei return rc; 688aa98d7cfSKaiGai Kohei } 689aa98d7cfSKaiGai Kohei 6908c5a0366SJean-Christophe DUBOIS void jffs2_xattr_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) 6918c5a0366SJean-Christophe DUBOIS { 6928c5a0366SJean-Christophe DUBOIS check_xattr_ref_inode(c, ic); 6938c5a0366SJean-Christophe DUBOIS } 6948c5a0366SJean-Christophe DUBOIS 695aa98d7cfSKaiGai Kohei /* -------- xattr subsystem functions --------------- 696aa98d7cfSKaiGai Kohei * jffs2_init_xattr_subsystem(c) 697aa98d7cfSKaiGai Kohei * is used to initialize semaphore and list_head, and some variables. 698aa98d7cfSKaiGai Kohei * jffs2_find_xattr_datum(c, xid) 699aa98d7cfSKaiGai Kohei * is used to lookup xdatum while scanning process. 700aa98d7cfSKaiGai Kohei * jffs2_clear_xattr_subsystem(c) 701aa98d7cfSKaiGai Kohei * is used to release any xattr related objects. 702aa98d7cfSKaiGai Kohei * jffs2_build_xattr_subsystem(c) 703aa98d7cfSKaiGai Kohei * is used to associate xdatum and xref while super block building process. 704aa98d7cfSKaiGai Kohei * jffs2_setup_xattr_datum(c, xid, version) 705aa98d7cfSKaiGai Kohei * is used to insert xdatum while scanning process. 706aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 707aa98d7cfSKaiGai Kohei void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c) 708aa98d7cfSKaiGai Kohei { 709aa98d7cfSKaiGai Kohei int i; 710aa98d7cfSKaiGai Kohei 711aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) 712aa98d7cfSKaiGai Kohei INIT_LIST_HEAD(&c->xattrindex[i]); 713aa98d7cfSKaiGai Kohei INIT_LIST_HEAD(&c->xattr_unchecked); 714c9f700f8SKaiGai Kohei INIT_LIST_HEAD(&c->xattr_dead_list); 715c9f700f8SKaiGai Kohei c->xref_dead_list = NULL; 7168f2b6f49SKaiGai Kohei c->xref_temp = NULL; 717aa98d7cfSKaiGai Kohei 718aa98d7cfSKaiGai Kohei init_rwsem(&c->xattr_sem); 719c9f700f8SKaiGai Kohei c->highest_xid = 0; 720c9f700f8SKaiGai Kohei c->highest_xseqno = 0; 721aa98d7cfSKaiGai Kohei c->xdatum_mem_usage = 0; 722aa98d7cfSKaiGai Kohei c->xdatum_mem_threshold = 32 * 1024; /* Default 32KB */ 723aa98d7cfSKaiGai Kohei } 724aa98d7cfSKaiGai Kohei 725aa98d7cfSKaiGai Kohei static struct jffs2_xattr_datum *jffs2_find_xattr_datum(struct jffs2_sb_info *c, uint32_t xid) 726aa98d7cfSKaiGai Kohei { 727aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 728aa98d7cfSKaiGai Kohei int i = xid % XATTRINDEX_HASHSIZE; 729aa98d7cfSKaiGai Kohei 730aa98d7cfSKaiGai Kohei /* It's only used in scanning/building process. */ 731aa98d7cfSKaiGai Kohei BUG_ON(!(c->flags & (JFFS2_SB_FLAG_SCANNING|JFFS2_SB_FLAG_BUILDING))); 732aa98d7cfSKaiGai Kohei 733aa98d7cfSKaiGai Kohei list_for_each_entry(xd, &c->xattrindex[i], xindex) { 734aa98d7cfSKaiGai Kohei if (xd->xid==xid) 735aa98d7cfSKaiGai Kohei return xd; 736aa98d7cfSKaiGai Kohei } 737aa98d7cfSKaiGai Kohei return NULL; 738aa98d7cfSKaiGai Kohei } 739aa98d7cfSKaiGai Kohei 740aa98d7cfSKaiGai Kohei void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c) 741aa98d7cfSKaiGai Kohei { 742aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 743aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 744aa98d7cfSKaiGai Kohei int i; 745aa98d7cfSKaiGai Kohei 7468f2b6f49SKaiGai Kohei for (ref=c->xref_temp; ref; ref = _ref) { 7478f2b6f49SKaiGai Kohei _ref = ref->next; 748aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 7498f2b6f49SKaiGai Kohei } 750c9f700f8SKaiGai Kohei 751c9f700f8SKaiGai Kohei for (ref=c->xref_dead_list; ref; ref = _ref) { 752c9f700f8SKaiGai Kohei _ref = ref->next; 753c9f700f8SKaiGai Kohei jffs2_free_xattr_ref(ref); 754c9f700f8SKaiGai Kohei } 755aa98d7cfSKaiGai Kohei 756aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) { 757aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { 758aa98d7cfSKaiGai Kohei list_del(&xd->xindex); 759aa98d7cfSKaiGai Kohei if (xd->xname) 760aa98d7cfSKaiGai Kohei kfree(xd->xname); 761aa98d7cfSKaiGai Kohei jffs2_free_xattr_datum(xd); 762aa98d7cfSKaiGai Kohei } 763aa98d7cfSKaiGai Kohei } 764c9f700f8SKaiGai Kohei 765c9f700f8SKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattr_dead_list, xindex) { 766c9f700f8SKaiGai Kohei list_del(&xd->xindex); 767c9f700f8SKaiGai Kohei jffs2_free_xattr_datum(xd); 768c9f700f8SKaiGai Kohei } 7692ad8ee71SDavid Woodhouse list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) { 7702ad8ee71SDavid Woodhouse list_del(&xd->xindex); 7712ad8ee71SDavid Woodhouse jffs2_free_xattr_datum(xd); 7722ad8ee71SDavid Woodhouse } 773aa98d7cfSKaiGai Kohei } 774aa98d7cfSKaiGai Kohei 775c9f700f8SKaiGai Kohei #define XREF_TMPHASH_SIZE (128) 776aa98d7cfSKaiGai Kohei void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c) 777aa98d7cfSKaiGai Kohei { 778aa98d7cfSKaiGai Kohei struct jffs2_xattr_ref *ref, *_ref; 779c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *xref_tmphash[XREF_TMPHASH_SIZE]; 780aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 781aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic; 782c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 783aa98d7cfSKaiGai Kohei int i, xdatum_count = 0, xdatum_unchecked_count = 0, xref_count = 0; 7848a13695cSKaiGai Kohei int xdatum_orphan_count = 0, xref_orphan_count = 0, xref_dead_count = 0; 785aa98d7cfSKaiGai Kohei 786aa98d7cfSKaiGai Kohei BUG_ON(!(c->flags & JFFS2_SB_FLAG_BUILDING)); 787aa98d7cfSKaiGai Kohei 7888a13695cSKaiGai Kohei /* Phase.1 : Merge same xref */ 789c9f700f8SKaiGai Kohei for (i=0; i < XREF_TMPHASH_SIZE; i++) 790c9f700f8SKaiGai Kohei xref_tmphash[i] = NULL; 7918f2b6f49SKaiGai Kohei for (ref=c->xref_temp; ref; ref=_ref) { 792c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *tmp; 793c9f700f8SKaiGai Kohei 7948f2b6f49SKaiGai Kohei _ref = ref->next; 795aa98d7cfSKaiGai Kohei if (ref_flags(ref->node) != REF_PRISTINE) { 796aa98d7cfSKaiGai Kohei if (verify_xattr_ref(c, ref)) { 797c9f700f8SKaiGai Kohei BUG_ON(ref->node->next_in_ino != (void *)ref); 798c9f700f8SKaiGai Kohei ref->node->next_in_ino = NULL; 799c9f700f8SKaiGai Kohei jffs2_mark_node_obsolete(c, ref->node); 800aa98d7cfSKaiGai Kohei jffs2_free_xattr_ref(ref); 801aa98d7cfSKaiGai Kohei continue; 802aa98d7cfSKaiGai Kohei } 803aa98d7cfSKaiGai Kohei } 804c9f700f8SKaiGai Kohei 805c9f700f8SKaiGai Kohei i = (ref->ino ^ ref->xid) % XREF_TMPHASH_SIZE; 806c9f700f8SKaiGai Kohei for (tmp=xref_tmphash[i]; tmp; tmp=tmp->next) { 807c9f700f8SKaiGai Kohei if (tmp->ino == ref->ino && tmp->xid == ref->xid) 808c9f700f8SKaiGai Kohei break; 809c9f700f8SKaiGai Kohei } 810c9f700f8SKaiGai Kohei if (tmp) { 811c9f700f8SKaiGai Kohei raw = ref->node; 812c9f700f8SKaiGai Kohei if (ref->xseqno > tmp->xseqno) { 813c9f700f8SKaiGai Kohei tmp->xseqno = ref->xseqno; 814c9f700f8SKaiGai Kohei raw->next_in_ino = tmp->node; 815c9f700f8SKaiGai Kohei tmp->node = raw; 816c9f700f8SKaiGai Kohei } else { 817c9f700f8SKaiGai Kohei raw->next_in_ino = tmp->node->next_in_ino; 818c9f700f8SKaiGai Kohei tmp->node->next_in_ino = raw; 819c9f700f8SKaiGai Kohei } 820c9f700f8SKaiGai Kohei jffs2_free_xattr_ref(ref); 821c9f700f8SKaiGai Kohei continue; 822c9f700f8SKaiGai Kohei } else { 823c9f700f8SKaiGai Kohei ref->next = xref_tmphash[i]; 824c9f700f8SKaiGai Kohei xref_tmphash[i] = ref; 825c9f700f8SKaiGai Kohei } 826c9f700f8SKaiGai Kohei } 827c9f700f8SKaiGai Kohei c->xref_temp = NULL; 828c9f700f8SKaiGai Kohei 8298a13695cSKaiGai Kohei /* Phase.2 : Bind xref with inode_cache and xattr_datum */ 830c9f700f8SKaiGai Kohei for (i=0; i < XREF_TMPHASH_SIZE; i++) { 831c9f700f8SKaiGai Kohei for (ref=xref_tmphash[i]; ref; ref=_ref) { 8328a13695cSKaiGai Kohei xref_count++; 833c9f700f8SKaiGai Kohei _ref = ref->next; 834c9f700f8SKaiGai Kohei if (is_xattr_ref_dead(ref)) { 835c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 836c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 8378a13695cSKaiGai Kohei xref_dead_count++; 838c9f700f8SKaiGai Kohei continue; 839c9f700f8SKaiGai Kohei } 840aa98d7cfSKaiGai Kohei /* At this point, ref->xid and ref->ino contain XID and inode number. 841aa98d7cfSKaiGai Kohei ref->xd and ref->ic are not valid yet. */ 842aa98d7cfSKaiGai Kohei xd = jffs2_find_xattr_datum(c, ref->xid); 843aa98d7cfSKaiGai Kohei ic = jffs2_get_ino_cache(c, ref->ino); 84427c72b04SDavid Woodhouse if (!xd || !ic || !ic->pino_nlink) { 8458a13695cSKaiGai Kohei dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) is orphan.\n", 846c9f700f8SKaiGai Kohei ref->ino, ref->xid, ref->xseqno); 8478a13695cSKaiGai Kohei ref->xseqno |= XREF_DELETE_MARKER; 848c9f700f8SKaiGai Kohei ref->next = c->xref_dead_list; 849c9f700f8SKaiGai Kohei c->xref_dead_list = ref; 8508a13695cSKaiGai Kohei xref_orphan_count++; 851aa98d7cfSKaiGai Kohei continue; 852aa98d7cfSKaiGai Kohei } 853aa98d7cfSKaiGai Kohei ref->xd = xd; 854aa98d7cfSKaiGai Kohei ref->ic = ic; 8552c887e23SKaiGai Kohei atomic_inc(&xd->refcnt); 8568f2b6f49SKaiGai Kohei ref->next = ic->xref; 8578f2b6f49SKaiGai Kohei ic->xref = ref; 858aa98d7cfSKaiGai Kohei } 859c9f700f8SKaiGai Kohei } 860aa98d7cfSKaiGai Kohei 8618a13695cSKaiGai Kohei /* Phase.3 : Link unchecked xdatum to xattr_unchecked list */ 862aa98d7cfSKaiGai Kohei for (i=0; i < XATTRINDEX_HASHSIZE; i++) { 863aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { 8648a13695cSKaiGai Kohei xdatum_count++; 865aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 8662c887e23SKaiGai Kohei if (!atomic_read(&xd->refcnt)) { 8678a13695cSKaiGai Kohei dbg_xattr("xdatum(xid=%u, version=%u) is orphan.\n", 868c9f700f8SKaiGai Kohei xd->xid, xd->version); 8698a13695cSKaiGai Kohei xd->flags |= JFFS2_XFLAGS_DEAD; 870c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_unchecked); 8718a13695cSKaiGai Kohei xdatum_orphan_count++; 872aa98d7cfSKaiGai Kohei continue; 873aa98d7cfSKaiGai Kohei } 874c9f700f8SKaiGai Kohei if (is_xattr_datum_unchecked(c, xd)) { 875c9f700f8SKaiGai Kohei dbg_xattr("unchecked xdatum(xid=%u, version=%u)\n", 876c9f700f8SKaiGai Kohei xd->xid, xd->version); 877aa98d7cfSKaiGai Kohei list_add(&xd->xindex, &c->xattr_unchecked); 878aa98d7cfSKaiGai Kohei xdatum_unchecked_count++; 879aa98d7cfSKaiGai Kohei } 880aa98d7cfSKaiGai Kohei } 881aa98d7cfSKaiGai Kohei } 882aa98d7cfSKaiGai Kohei /* build complete */ 8838a13695cSKaiGai Kohei JFFS2_NOTICE("complete building xattr subsystem, %u of xdatum" 8848a13695cSKaiGai Kohei " (%u unchecked, %u orphan) and " 8858a13695cSKaiGai Kohei "%u of xref (%u dead, %u orphan) found.\n", 8868a13695cSKaiGai Kohei xdatum_count, xdatum_unchecked_count, xdatum_orphan_count, 8878a13695cSKaiGai Kohei xref_count, xref_dead_count, xref_orphan_count); 888aa98d7cfSKaiGai Kohei } 889aa98d7cfSKaiGai Kohei 890aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, 891aa98d7cfSKaiGai Kohei uint32_t xid, uint32_t version) 892aa98d7cfSKaiGai Kohei { 893c9f700f8SKaiGai Kohei struct jffs2_xattr_datum *xd; 894aa98d7cfSKaiGai Kohei 895c9f700f8SKaiGai Kohei xd = jffs2_find_xattr_datum(c, xid); 896c9f700f8SKaiGai Kohei if (!xd) { 897aa98d7cfSKaiGai Kohei xd = jffs2_alloc_xattr_datum(); 898aa98d7cfSKaiGai Kohei if (!xd) 899aa98d7cfSKaiGai Kohei return ERR_PTR(-ENOMEM); 900aa98d7cfSKaiGai Kohei xd->xid = xid; 901aa98d7cfSKaiGai Kohei xd->version = version; 902aa98d7cfSKaiGai Kohei if (xd->xid > c->highest_xid) 903aa98d7cfSKaiGai Kohei c->highest_xid = xd->xid; 904aa98d7cfSKaiGai Kohei list_add_tail(&xd->xindex, &c->xattrindex[xid % XATTRINDEX_HASHSIZE]); 905aa98d7cfSKaiGai Kohei } 906aa98d7cfSKaiGai Kohei return xd; 907aa98d7cfSKaiGai Kohei } 908aa98d7cfSKaiGai Kohei 909aa98d7cfSKaiGai Kohei /* -------- xattr subsystem functions --------------- 910aa98d7cfSKaiGai Kohei * xprefix_to_handler(xprefix) 911aa98d7cfSKaiGai Kohei * is used to translate xprefix into xattr_handler. 912aa98d7cfSKaiGai Kohei * jffs2_listxattr(dentry, buffer, size) 913aa98d7cfSKaiGai Kohei * is an implementation of listxattr handler on jffs2. 914aa98d7cfSKaiGai Kohei * do_jffs2_getxattr(inode, xprefix, xname, buffer, size) 915aa98d7cfSKaiGai Kohei * is an implementation of getxattr handler on jffs2. 916aa98d7cfSKaiGai Kohei * do_jffs2_setxattr(inode, xprefix, xname, buffer, size, flags) 917aa98d7cfSKaiGai Kohei * is an implementation of setxattr handler on jffs2. 918aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 919365f0cb9SStephen Hemminger const struct xattr_handler *jffs2_xattr_handlers[] = { 920aa98d7cfSKaiGai Kohei &jffs2_user_xattr_handler, 921aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 922aa98d7cfSKaiGai Kohei &jffs2_security_xattr_handler, 923aa98d7cfSKaiGai Kohei #endif 924aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 925f2963d45SChristoph Hellwig &posix_acl_access_xattr_handler, 926f2963d45SChristoph Hellwig &posix_acl_default_xattr_handler, 927aa98d7cfSKaiGai Kohei #endif 928aa98d7cfSKaiGai Kohei &jffs2_trusted_xattr_handler, 929aa98d7cfSKaiGai Kohei NULL 930aa98d7cfSKaiGai Kohei }; 931aa98d7cfSKaiGai Kohei 932365f0cb9SStephen Hemminger static const struct xattr_handler *xprefix_to_handler(int xprefix) { 933365f0cb9SStephen Hemminger const struct xattr_handler *ret; 934aa98d7cfSKaiGai Kohei 935aa98d7cfSKaiGai Kohei switch (xprefix) { 936aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_USER: 937aa98d7cfSKaiGai Kohei ret = &jffs2_user_xattr_handler; 938aa98d7cfSKaiGai Kohei break; 939aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_SECURITY 940aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_SECURITY: 941aa98d7cfSKaiGai Kohei ret = &jffs2_security_xattr_handler; 942aa98d7cfSKaiGai Kohei break; 943aa98d7cfSKaiGai Kohei #endif 944aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 945aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_ACL_ACCESS: 946f2963d45SChristoph Hellwig ret = &posix_acl_access_xattr_handler; 947aa98d7cfSKaiGai Kohei break; 948aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_ACL_DEFAULT: 949f2963d45SChristoph Hellwig ret = &posix_acl_default_xattr_handler; 950aa98d7cfSKaiGai Kohei break; 951aa98d7cfSKaiGai Kohei #endif 952aa98d7cfSKaiGai Kohei case JFFS2_XPREFIX_TRUSTED: 953aa98d7cfSKaiGai Kohei ret = &jffs2_trusted_xattr_handler; 954aa98d7cfSKaiGai Kohei break; 955aa98d7cfSKaiGai Kohei default: 956aa98d7cfSKaiGai Kohei ret = NULL; 957aa98d7cfSKaiGai Kohei break; 958aa98d7cfSKaiGai Kohei } 959aa98d7cfSKaiGai Kohei return ret; 960aa98d7cfSKaiGai Kohei } 961aa98d7cfSKaiGai Kohei 962aa98d7cfSKaiGai Kohei ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size) 963aa98d7cfSKaiGai Kohei { 964aa98d7cfSKaiGai Kohei struct inode *inode = dentry->d_inode; 965aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 966aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 967aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 9688f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, **pref; 969aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 970365f0cb9SStephen Hemminger const struct xattr_handler *xhandle; 971aa98d7cfSKaiGai Kohei ssize_t len, rc; 972aa98d7cfSKaiGai Kohei int retry = 0; 973aa98d7cfSKaiGai Kohei 9748f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 975aa98d7cfSKaiGai Kohei if (unlikely(rc)) 976aa98d7cfSKaiGai Kohei return rc; 977aa98d7cfSKaiGai Kohei 978aa98d7cfSKaiGai Kohei down_read(&c->xattr_sem); 979aa98d7cfSKaiGai Kohei retry: 980aa98d7cfSKaiGai Kohei len = 0; 9818f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 982aa98d7cfSKaiGai Kohei BUG_ON(ref->ic != ic); 983aa98d7cfSKaiGai Kohei xd = ref->xd; 984aa98d7cfSKaiGai Kohei if (!xd->xname) { 985aa98d7cfSKaiGai Kohei /* xdatum is unchached */ 986aa98d7cfSKaiGai Kohei if (!retry) { 987aa98d7cfSKaiGai Kohei retry = 1; 988aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 989aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 990aa98d7cfSKaiGai Kohei goto retry; 991aa98d7cfSKaiGai Kohei } else { 992aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 993aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 9948f2b6f49SKaiGai Kohei *pref = ref->next; 9958a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 996aa98d7cfSKaiGai Kohei goto retry; 997aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 998aa98d7cfSKaiGai Kohei goto out; 999aa98d7cfSKaiGai Kohei } 1000aa98d7cfSKaiGai Kohei } 1001aa98d7cfSKaiGai Kohei xhandle = xprefix_to_handler(xd->xprefix); 1002aa98d7cfSKaiGai Kohei if (!xhandle) 1003aa98d7cfSKaiGai Kohei continue; 1004aa98d7cfSKaiGai Kohei if (buffer) { 1005431547b3SChristoph Hellwig rc = xhandle->list(dentry, buffer+len, size-len, 1006431547b3SChristoph Hellwig xd->xname, xd->name_len, xd->flags); 1007aa98d7cfSKaiGai Kohei } else { 1008431547b3SChristoph Hellwig rc = xhandle->list(dentry, NULL, 0, xd->xname, 1009431547b3SChristoph Hellwig xd->name_len, xd->flags); 1010aa98d7cfSKaiGai Kohei } 1011aa98d7cfSKaiGai Kohei if (rc < 0) 1012aa98d7cfSKaiGai Kohei goto out; 1013aa98d7cfSKaiGai Kohei len += rc; 1014aa98d7cfSKaiGai Kohei } 1015aa98d7cfSKaiGai Kohei rc = len; 1016aa98d7cfSKaiGai Kohei out: 1017aa98d7cfSKaiGai Kohei if (!retry) { 1018aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1019aa98d7cfSKaiGai Kohei } else { 1020aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1021aa98d7cfSKaiGai Kohei } 1022aa98d7cfSKaiGai Kohei return rc; 1023aa98d7cfSKaiGai Kohei } 1024aa98d7cfSKaiGai Kohei 1025aa98d7cfSKaiGai Kohei int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, 1026aa98d7cfSKaiGai Kohei char *buffer, size_t size) 1027aa98d7cfSKaiGai Kohei { 1028aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 1029aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 1030aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 1031aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 10328f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, **pref; 1033aa98d7cfSKaiGai Kohei int rc, retry = 0; 1034aa98d7cfSKaiGai Kohei 10358f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 1036aa98d7cfSKaiGai Kohei if (unlikely(rc)) 1037aa98d7cfSKaiGai Kohei return rc; 1038aa98d7cfSKaiGai Kohei 1039aa98d7cfSKaiGai Kohei down_read(&c->xattr_sem); 1040aa98d7cfSKaiGai Kohei retry: 10418f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 1042aa98d7cfSKaiGai Kohei BUG_ON(ref->ic!=ic); 1043aa98d7cfSKaiGai Kohei 1044aa98d7cfSKaiGai Kohei xd = ref->xd; 1045aa98d7cfSKaiGai Kohei if (xd->xprefix != xprefix) 1046aa98d7cfSKaiGai Kohei continue; 1047aa98d7cfSKaiGai Kohei if (!xd->xname) { 1048aa98d7cfSKaiGai Kohei /* xdatum is unchached */ 1049aa98d7cfSKaiGai Kohei if (!retry) { 1050aa98d7cfSKaiGai Kohei retry = 1; 1051aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1052aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1053aa98d7cfSKaiGai Kohei goto retry; 1054aa98d7cfSKaiGai Kohei } else { 1055aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1056aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 10578f2b6f49SKaiGai Kohei *pref = ref->next; 10588a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 1059aa98d7cfSKaiGai Kohei goto retry; 1060aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) { 1061aa98d7cfSKaiGai Kohei goto out; 1062aa98d7cfSKaiGai Kohei } 1063aa98d7cfSKaiGai Kohei } 1064aa98d7cfSKaiGai Kohei } 1065aa98d7cfSKaiGai Kohei if (!strcmp(xname, xd->xname)) { 1066aa98d7cfSKaiGai Kohei rc = xd->value_len; 1067aa98d7cfSKaiGai Kohei if (buffer) { 1068aa98d7cfSKaiGai Kohei if (size < rc) { 1069aa98d7cfSKaiGai Kohei rc = -ERANGE; 1070aa98d7cfSKaiGai Kohei } else { 1071aa98d7cfSKaiGai Kohei memcpy(buffer, xd->xvalue, rc); 1072aa98d7cfSKaiGai Kohei } 1073aa98d7cfSKaiGai Kohei } 1074aa98d7cfSKaiGai Kohei goto out; 1075aa98d7cfSKaiGai Kohei } 1076aa98d7cfSKaiGai Kohei } 1077aa98d7cfSKaiGai Kohei rc = -ENODATA; 1078aa98d7cfSKaiGai Kohei out: 1079aa98d7cfSKaiGai Kohei if (!retry) { 1080aa98d7cfSKaiGai Kohei up_read(&c->xattr_sem); 1081aa98d7cfSKaiGai Kohei } else { 1082aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1083aa98d7cfSKaiGai Kohei } 1084aa98d7cfSKaiGai Kohei return rc; 1085aa98d7cfSKaiGai Kohei } 1086aa98d7cfSKaiGai Kohei 1087aa98d7cfSKaiGai Kohei int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, 1088aa98d7cfSKaiGai Kohei const char *buffer, size_t size, int flags) 1089aa98d7cfSKaiGai Kohei { 1090aa98d7cfSKaiGai Kohei struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); 1091aa98d7cfSKaiGai Kohei struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); 1092aa98d7cfSKaiGai Kohei struct jffs2_inode_cache *ic = f->inocache; 1093aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd; 10948f2b6f49SKaiGai Kohei struct jffs2_xattr_ref *ref, *newref, **pref; 10959fe4854cSDavid Woodhouse uint32_t length, request; 1096aa98d7cfSKaiGai Kohei int rc; 1097aa98d7cfSKaiGai Kohei 10988f2b6f49SKaiGai Kohei rc = check_xattr_ref_inode(c, ic); 1099aa98d7cfSKaiGai Kohei if (unlikely(rc)) 1100aa98d7cfSKaiGai Kohei return rc; 1101aa98d7cfSKaiGai Kohei 1102aa98d7cfSKaiGai Kohei request = PAD(sizeof(struct jffs2_raw_xattr) + strlen(xname) + 1 + size); 11039fe4854cSDavid Woodhouse rc = jffs2_reserve_space(c, request, &length, 1104aa98d7cfSKaiGai Kohei ALLOC_NORMAL, JFFS2_SUMMARY_XATTR_SIZE); 1105aa98d7cfSKaiGai Kohei if (rc) { 1106aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); 1107aa98d7cfSKaiGai Kohei return rc; 1108aa98d7cfSKaiGai Kohei } 1109aa98d7cfSKaiGai Kohei 1110aa98d7cfSKaiGai Kohei /* Find existing xattr */ 1111aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1112aa98d7cfSKaiGai Kohei retry: 11138f2b6f49SKaiGai Kohei for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { 1114aa98d7cfSKaiGai Kohei xd = ref->xd; 1115aa98d7cfSKaiGai Kohei if (xd->xprefix != xprefix) 1116aa98d7cfSKaiGai Kohei continue; 1117aa98d7cfSKaiGai Kohei if (!xd->xname) { 1118aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 1119aa98d7cfSKaiGai Kohei if (unlikely(rc > 0)) { 11208f2b6f49SKaiGai Kohei *pref = ref->next; 11218a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 1122aa98d7cfSKaiGai Kohei goto retry; 1123aa98d7cfSKaiGai Kohei } else if (unlikely(rc < 0)) 1124aa98d7cfSKaiGai Kohei goto out; 1125aa98d7cfSKaiGai Kohei } 1126aa98d7cfSKaiGai Kohei if (!strcmp(xd->xname, xname)) { 1127aa98d7cfSKaiGai Kohei if (flags & XATTR_CREATE) { 1128aa98d7cfSKaiGai Kohei rc = -EEXIST; 1129aa98d7cfSKaiGai Kohei goto out; 1130aa98d7cfSKaiGai Kohei } 1131aa98d7cfSKaiGai Kohei if (!buffer) { 11328a13695cSKaiGai Kohei ref->ino = ic->ino; 11338a13695cSKaiGai Kohei ref->xid = xd->xid; 11348a13695cSKaiGai Kohei ref->xseqno |= XREF_DELETE_MARKER; 11358a13695cSKaiGai Kohei rc = save_xattr_ref(c, ref); 11368a13695cSKaiGai Kohei if (!rc) { 11378f2b6f49SKaiGai Kohei *pref = ref->next; 11388a13695cSKaiGai Kohei spin_lock(&c->erase_completion_lock); 11398a13695cSKaiGai Kohei ref->next = c->xref_dead_list; 11408a13695cSKaiGai Kohei c->xref_dead_list = ref; 11418a13695cSKaiGai Kohei spin_unlock(&c->erase_completion_lock); 1142c6e8c6ccSKaiGai Kohei unrefer_xattr_datum(c, xd); 11438a13695cSKaiGai Kohei } else { 11448a13695cSKaiGai Kohei ref->ic = ic; 11458a13695cSKaiGai Kohei ref->xd = xd; 11468a13695cSKaiGai Kohei ref->xseqno &= ~XREF_DELETE_MARKER; 11478a13695cSKaiGai Kohei } 1148aa98d7cfSKaiGai Kohei goto out; 1149aa98d7cfSKaiGai Kohei } 1150aa98d7cfSKaiGai Kohei goto found; 1151aa98d7cfSKaiGai Kohei } 1152aa98d7cfSKaiGai Kohei } 1153aa98d7cfSKaiGai Kohei /* not found */ 1154aa98d7cfSKaiGai Kohei if (flags & XATTR_REPLACE) { 1155aa98d7cfSKaiGai Kohei rc = -ENODATA; 1156aa98d7cfSKaiGai Kohei goto out; 1157aa98d7cfSKaiGai Kohei } 1158aa98d7cfSKaiGai Kohei if (!buffer) { 1159c9f700f8SKaiGai Kohei rc = -ENODATA; 1160aa98d7cfSKaiGai Kohei goto out; 1161aa98d7cfSKaiGai Kohei } 1162aa98d7cfSKaiGai Kohei found: 11639fe4854cSDavid Woodhouse xd = create_xattr_datum(c, xprefix, xname, buffer, size); 1164aa98d7cfSKaiGai Kohei if (IS_ERR(xd)) { 1165aa98d7cfSKaiGai Kohei rc = PTR_ERR(xd); 1166aa98d7cfSKaiGai Kohei goto out; 1167aa98d7cfSKaiGai Kohei } 1168aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1169aa98d7cfSKaiGai Kohei jffs2_complete_reservation(c); 1170aa98d7cfSKaiGai Kohei 1171aa98d7cfSKaiGai Kohei /* create xattr_ref */ 1172aa98d7cfSKaiGai Kohei request = PAD(sizeof(struct jffs2_raw_xref)); 11739fe4854cSDavid Woodhouse rc = jffs2_reserve_space(c, request, &length, 1174aa98d7cfSKaiGai Kohei ALLOC_NORMAL, JFFS2_SUMMARY_XREF_SIZE); 1175c9f700f8SKaiGai Kohei down_write(&c->xattr_sem); 1176aa98d7cfSKaiGai Kohei if (rc) { 1177aa98d7cfSKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u\n", rc, request); 1178c6e8c6ccSKaiGai Kohei unrefer_xattr_datum(c, xd); 1179aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1180aa98d7cfSKaiGai Kohei return rc; 1181aa98d7cfSKaiGai Kohei } 11828f2b6f49SKaiGai Kohei if (ref) 11838f2b6f49SKaiGai Kohei *pref = ref->next; 11849fe4854cSDavid Woodhouse newref = create_xattr_ref(c, ic, xd); 1185aa98d7cfSKaiGai Kohei if (IS_ERR(newref)) { 11868f2b6f49SKaiGai Kohei if (ref) { 11878f2b6f49SKaiGai Kohei ref->next = ic->xref; 11888f2b6f49SKaiGai Kohei ic->xref = ref; 11898f2b6f49SKaiGai Kohei } 1190aa98d7cfSKaiGai Kohei rc = PTR_ERR(newref); 1191c6e8c6ccSKaiGai Kohei unrefer_xattr_datum(c, xd); 1192aa98d7cfSKaiGai Kohei } else if (ref) { 11938a13695cSKaiGai Kohei delete_xattr_ref(c, ref); 1194aa98d7cfSKaiGai Kohei } 1195aa98d7cfSKaiGai Kohei out: 1196aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1197aa98d7cfSKaiGai Kohei jffs2_complete_reservation(c); 1198aa98d7cfSKaiGai Kohei return rc; 1199aa98d7cfSKaiGai Kohei } 1200aa98d7cfSKaiGai Kohei 1201aa98d7cfSKaiGai Kohei /* -------- garbage collector functions ------------- 1202c9f700f8SKaiGai Kohei * jffs2_garbage_collect_xattr_datum(c, xd, raw) 1203aa98d7cfSKaiGai Kohei * is used to move xdatum into new node. 1204c9f700f8SKaiGai Kohei * jffs2_garbage_collect_xattr_ref(c, ref, raw) 1205aa98d7cfSKaiGai Kohei * is used to move xref into new node. 1206aa98d7cfSKaiGai Kohei * jffs2_verify_xattr(c) 1207aa98d7cfSKaiGai Kohei * is used to call do_verify_xattr_datum() before garbage collecting. 12088a13695cSKaiGai Kohei * jffs2_release_xattr_datum(c, xd) 12098a13695cSKaiGai Kohei * is used to release an in-memory object of xdatum. 12108a13695cSKaiGai Kohei * jffs2_release_xattr_ref(c, ref) 12118a13695cSKaiGai Kohei * is used to release an in-memory object of xref. 1212aa98d7cfSKaiGai Kohei * -------------------------------------------------- */ 1213c9f700f8SKaiGai Kohei int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, 1214c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw) 1215aa98d7cfSKaiGai Kohei { 12169fe4854cSDavid Woodhouse uint32_t totlen, length, old_ofs; 1217c9f700f8SKaiGai Kohei int rc = 0; 1218aa98d7cfSKaiGai Kohei 1219084702e0SKaiGai Kohei down_write(&c->xattr_sem); 1220c9f700f8SKaiGai Kohei if (xd->node != raw) 1221c9f700f8SKaiGai Kohei goto out; 12228a13695cSKaiGai Kohei if (xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID)) 1223c9f700f8SKaiGai Kohei goto out; 1224aa98d7cfSKaiGai Kohei 1225aa98d7cfSKaiGai Kohei rc = load_xattr_datum(c, xd); 12268a13695cSKaiGai Kohei if (unlikely(rc)) { 12278a13695cSKaiGai Kohei rc = (rc > 0) ? 0 : rc; 1228084702e0SKaiGai Kohei goto out; 1229aa98d7cfSKaiGai Kohei } 12308a13695cSKaiGai Kohei old_ofs = ref_offset(xd->node); 12318a13695cSKaiGai Kohei totlen = PAD(sizeof(struct jffs2_raw_xattr) 12328a13695cSKaiGai Kohei + xd->name_len + 1 + xd->value_len); 12339fe4854cSDavid Woodhouse rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XATTR_SIZE); 1234c9f700f8SKaiGai Kohei if (rc) { 1235c9f700f8SKaiGai Kohei JFFS2_WARNING("jffs2_reserve_space_gc()=%d, request=%u\n", rc, totlen); 1236084702e0SKaiGai Kohei goto out; 1237aa98d7cfSKaiGai Kohei } 12389fe4854cSDavid Woodhouse rc = save_xattr_datum(c, xd); 1239aa98d7cfSKaiGai Kohei if (!rc) 1240aa98d7cfSKaiGai Kohei dbg_xattr("xdatum (xid=%u, version=%u) GC'ed from %#08x to %08x\n", 1241aa98d7cfSKaiGai Kohei xd->xid, xd->version, old_ofs, ref_offset(xd->node)); 1242084702e0SKaiGai Kohei out: 1243c9f700f8SKaiGai Kohei if (!rc) 1244c9f700f8SKaiGai Kohei jffs2_mark_node_obsolete(c, raw); 1245084702e0SKaiGai Kohei up_write(&c->xattr_sem); 1246aa98d7cfSKaiGai Kohei return rc; 1247aa98d7cfSKaiGai Kohei } 1248aa98d7cfSKaiGai Kohei 1249c9f700f8SKaiGai Kohei int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, 1250c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw) 1251aa98d7cfSKaiGai Kohei { 12529fe4854cSDavid Woodhouse uint32_t totlen, length, old_ofs; 1253c9f700f8SKaiGai Kohei int rc = 0; 1254aa98d7cfSKaiGai Kohei 1255084702e0SKaiGai Kohei down_write(&c->xattr_sem); 1256aa98d7cfSKaiGai Kohei BUG_ON(!ref->node); 1257aa98d7cfSKaiGai Kohei 1258c9f700f8SKaiGai Kohei if (ref->node != raw) 1259c9f700f8SKaiGai Kohei goto out; 1260c9f700f8SKaiGai Kohei if (is_xattr_ref_dead(ref) && (raw->next_in_ino == (void *)ref)) 1261084702e0SKaiGai Kohei goto out; 1262084702e0SKaiGai Kohei 1263c9f700f8SKaiGai Kohei old_ofs = ref_offset(ref->node); 1264c9f700f8SKaiGai Kohei totlen = ref_totlen(c, c->gcblock, ref->node); 1265c9f700f8SKaiGai Kohei 12669fe4854cSDavid Woodhouse rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XREF_SIZE); 1267c9f700f8SKaiGai Kohei if (rc) { 1268c9f700f8SKaiGai Kohei JFFS2_WARNING("%s: jffs2_reserve_space_gc() = %d, request = %u\n", 12698e24eea7SHarvey Harrison __func__, rc, totlen); 1270084702e0SKaiGai Kohei rc = rc ? rc : -EBADFD; 1271084702e0SKaiGai Kohei goto out; 1272aa98d7cfSKaiGai Kohei } 12739fe4854cSDavid Woodhouse rc = save_xattr_ref(c, ref); 1274aa98d7cfSKaiGai Kohei if (!rc) 1275aa98d7cfSKaiGai Kohei dbg_xattr("xref (ino=%u, xid=%u) GC'ed from %#08x to %08x\n", 1276aa98d7cfSKaiGai Kohei ref->ic->ino, ref->xd->xid, old_ofs, ref_offset(ref->node)); 1277084702e0SKaiGai Kohei out: 1278c9f700f8SKaiGai Kohei if (!rc) 1279c9f700f8SKaiGai Kohei jffs2_mark_node_obsolete(c, raw); 1280084702e0SKaiGai Kohei up_write(&c->xattr_sem); 1281aa98d7cfSKaiGai Kohei return rc; 1282aa98d7cfSKaiGai Kohei } 1283aa98d7cfSKaiGai Kohei 1284aa98d7cfSKaiGai Kohei int jffs2_verify_xattr(struct jffs2_sb_info *c) 1285aa98d7cfSKaiGai Kohei { 1286aa98d7cfSKaiGai Kohei struct jffs2_xattr_datum *xd, *_xd; 1287c9f700f8SKaiGai Kohei struct jffs2_eraseblock *jeb; 1288c9f700f8SKaiGai Kohei struct jffs2_raw_node_ref *raw; 1289c9f700f8SKaiGai Kohei uint32_t totlen; 1290aa98d7cfSKaiGai Kohei int rc; 1291aa98d7cfSKaiGai Kohei 1292aa98d7cfSKaiGai Kohei down_write(&c->xattr_sem); 1293aa98d7cfSKaiGai Kohei list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) { 1294aa98d7cfSKaiGai Kohei rc = do_verify_xattr_datum(c, xd); 1295c9f700f8SKaiGai Kohei if (rc < 0) 1296c9f700f8SKaiGai Kohei continue; 1297aa98d7cfSKaiGai Kohei list_del_init(&xd->xindex); 1298c9f700f8SKaiGai Kohei spin_lock(&c->erase_completion_lock); 1299c9f700f8SKaiGai Kohei for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { 1300c9f700f8SKaiGai Kohei if (ref_flags(raw) != REF_UNCHECKED) 1301c9f700f8SKaiGai Kohei continue; 1302c9f700f8SKaiGai Kohei jeb = &c->blocks[ref_offset(raw) / c->sector_size]; 1303c9f700f8SKaiGai Kohei totlen = PAD(ref_totlen(c, jeb, raw)); 1304c9f700f8SKaiGai Kohei c->unchecked_size -= totlen; c->used_size += totlen; 1305c9f700f8SKaiGai Kohei jeb->unchecked_size -= totlen; jeb->used_size += totlen; 1306c9f700f8SKaiGai Kohei raw->flash_offset = ref_offset(raw) 1307c9f700f8SKaiGai Kohei | ((xd->node == (void *)raw) ? REF_PRISTINE : REF_NORMAL); 1308aa98d7cfSKaiGai Kohei } 13098a13695cSKaiGai Kohei if (xd->flags & JFFS2_XFLAGS_DEAD) 1310c9f700f8SKaiGai Kohei list_add(&xd->xindex, &c->xattr_dead_list); 1311c9f700f8SKaiGai Kohei spin_unlock(&c->erase_completion_lock); 1312aa98d7cfSKaiGai Kohei } 1313aa98d7cfSKaiGai Kohei up_write(&c->xattr_sem); 1314aa98d7cfSKaiGai Kohei return list_empty(&c->xattr_unchecked) ? 1 : 0; 1315aa98d7cfSKaiGai Kohei } 1316c9f700f8SKaiGai Kohei 1317c9f700f8SKaiGai Kohei void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) 1318c9f700f8SKaiGai Kohei { 1319c9f700f8SKaiGai Kohei /* must be called under spin_lock(&c->erase_completion_lock) */ 13202c887e23SKaiGai Kohei if (atomic_read(&xd->refcnt) || xd->node != (void *)xd) 1321c9f700f8SKaiGai Kohei return; 1322c9f700f8SKaiGai Kohei 1323c9f700f8SKaiGai Kohei list_del(&xd->xindex); 1324c9f700f8SKaiGai Kohei jffs2_free_xattr_datum(xd); 1325c9f700f8SKaiGai Kohei } 1326c9f700f8SKaiGai Kohei 1327c9f700f8SKaiGai Kohei void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) 1328c9f700f8SKaiGai Kohei { 1329c9f700f8SKaiGai Kohei /* must be called under spin_lock(&c->erase_completion_lock) */ 1330c9f700f8SKaiGai Kohei struct jffs2_xattr_ref *tmp, **ptmp; 1331c9f700f8SKaiGai Kohei 1332c9f700f8SKaiGai Kohei if (ref->node != (void *)ref) 1333c9f700f8SKaiGai Kohei return; 1334c9f700f8SKaiGai Kohei 1335c9f700f8SKaiGai Kohei for (tmp=c->xref_dead_list, ptmp=&c->xref_dead_list; tmp; ptmp=&tmp->next, tmp=tmp->next) { 1336c9f700f8SKaiGai Kohei if (ref == tmp) { 1337c9f700f8SKaiGai Kohei *ptmp = tmp->next; 1338c9f700f8SKaiGai Kohei break; 1339c9f700f8SKaiGai Kohei } 1340c9f700f8SKaiGai Kohei } 13418a13695cSKaiGai Kohei jffs2_free_xattr_ref(ref); 1342c9f700f8SKaiGai Kohei } 1343