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fs/jffs2/xattr.c
38.3 KB
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/* * JFFS2 -- Journalling Flash File System, Version 2. |
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* |
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* Copyright © 2006 NEC Corporation |
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* |
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* Created by KaiGai Kohei <kaigai@ak.jp.nec.com> * * For licensing information, see the file 'LICENCE' in this directory. * */ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#define JFFS2_XATTR_IS_CORRUPTED 1 |
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#include <linux/kernel.h> #include <linux/slab.h> #include <linux/fs.h> #include <linux/time.h> #include <linux/pagemap.h> #include <linux/highmem.h> #include <linux/crc32.h> #include <linux/jffs2.h> #include <linux/xattr.h> |
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#include <linux/posix_acl_xattr.h> |
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#include <linux/mtd/mtd.h> #include "nodelist.h" /* -------- xdatum related functions ---------------- * xattr_datum_hashkey(xprefix, xname, xvalue, xsize) * is used to calcurate xdatum hashkey. The reminder of hashkey into XATTRINDEX_HASHSIZE is * the index of the xattr name/value pair cache (c->xattrindex). |
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* is_xattr_datum_unchecked(c, xd) * returns 1, if xdatum contains any unchecked raw nodes. if all raw nodes are not * unchecked, it returns 0. |
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* unload_xattr_datum(c, xd) * is used to release xattr name/value pair and detach from c->xattrindex. * reclaim_xattr_datum(c) * is used to reclaim xattr name/value pairs on the xattr name/value pair cache when |
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* memory usage by cache is over c->xdatum_mem_threshold. Currently, this threshold |
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* is hard coded as 32KiB. |
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* do_verify_xattr_datum(c, xd) * is used to load the xdatum informations without name/value pair from the medium. * It's necessary once, because those informations are not collected during mounting * process when EBS is enabled. * 0 will be returned, if success. An negative return value means recoverable error, and * positive return value means unrecoverable error. Thus, caller must remove this xdatum * and xref when it returned positive value. * do_load_xattr_datum(c, xd) * is used to load name/value pair from the medium. * The meanings of return value is same as do_verify_xattr_datum(). * load_xattr_datum(c, xd) * is used to be as a wrapper of do_verify_xattr_datum() and do_load_xattr_datum(). * If xd need to call do_verify_xattr_datum() at first, it's called before calling * do_load_xattr_datum(). The meanings of return value is same as do_verify_xattr_datum(). |
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* save_xattr_datum(c, xd) |
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* is used to write xdatum to medium. xd->version will be incremented. |
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* create_xattr_datum(c, xprefix, xname, xvalue, xsize) |
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* is used to create new xdatum and write to medium. |
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* unrefer_xattr_datum(c, xd) * is used to delete a xdatum. When nobody refers this xdatum, JFFS2_XFLAGS_DEAD * is set on xd->flags and chained xattr_dead_list or release it immediately. * In the first case, the garbage collector release it later. |
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* -------------------------------------------------- */ |
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static uint32_t xattr_datum_hashkey(int xprefix, const char *xname, const char *xvalue, int xsize) { int name_len = strlen(xname); return crc32(xprefix, xname, name_len) ^ crc32(xprefix, xvalue, xsize); } |
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static int is_xattr_datum_unchecked(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) { struct jffs2_raw_node_ref *raw; int rc = 0; spin_lock(&c->erase_completion_lock); for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { if (ref_flags(raw) == REF_UNCHECKED) { rc = 1; break; } } spin_unlock(&c->erase_completion_lock); return rc; } |
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static void unload_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) { /* must be called under down_write(xattr_sem) */ |
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D1(dbg_xattr("%s: xid=%u, version=%u ", __func__, xd->xid, xd->version)); |
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if (xd->xname) { c->xdatum_mem_usage -= (xd->name_len + 1 + xd->value_len); kfree(xd->xname); } list_del_init(&xd->xindex); xd->hashkey = 0; xd->xname = NULL; xd->xvalue = NULL; } static void reclaim_xattr_datum(struct jffs2_sb_info *c) { /* must be called under down_write(xattr_sem) */ struct jffs2_xattr_datum *xd, *_xd; uint32_t target, before; static int index = 0; int count; if (c->xdatum_mem_threshold > c->xdatum_mem_usage) return; before = c->xdatum_mem_usage; target = c->xdatum_mem_usage * 4 / 5; /* 20% reduction */ for (count = 0; count < XATTRINDEX_HASHSIZE; count++) { list_for_each_entry_safe(xd, _xd, &c->xattrindex[index], xindex) { if (xd->flags & JFFS2_XFLAGS_HOT) { xd->flags &= ~JFFS2_XFLAGS_HOT; } else if (!(xd->flags & JFFS2_XFLAGS_BIND)) { unload_xattr_datum(c, xd); } if (c->xdatum_mem_usage <= target) goto out; } index = (index+1) % XATTRINDEX_HASHSIZE; } out: JFFS2_NOTICE("xdatum_mem_usage from %u byte to %u byte (%u byte reclaimed) ", before, c->xdatum_mem_usage, before - c->xdatum_mem_usage); } |
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static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) { /* must be called under down_write(xattr_sem) */ struct jffs2_eraseblock *jeb; |
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struct jffs2_raw_node_ref *raw; |
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struct jffs2_raw_xattr rx; size_t readlen; |
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uint32_t crc, offset, totlen; |
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int rc; |
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spin_lock(&c->erase_completion_lock); offset = ref_offset(xd->node); if (ref_flags(xd->node) == REF_PRISTINE) goto complete; spin_unlock(&c->erase_completion_lock); |
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rc = jffs2_flash_read(c, offset, sizeof(rx), &readlen, (char *)&rx); |
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if (rc || readlen != sizeof(rx)) { |
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JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu at %#08x ", |
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rc, sizeof(rx), readlen, offset); |
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return rc ? rc : -EIO; } crc = crc32(0, &rx, sizeof(rx) - 4); if (crc != je32_to_cpu(rx.node_crc)) { |
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JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x ", offset, je32_to_cpu(rx.hdr_crc), crc); xd->flags |= JFFS2_XFLAGS_INVALID; |
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return JFFS2_XATTR_IS_CORRUPTED; |
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} |
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totlen = PAD(sizeof(rx) + rx.name_len + 1 + je16_to_cpu(rx.value_len)); |
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if (je16_to_cpu(rx.magic) != JFFS2_MAGIC_BITMASK || je16_to_cpu(rx.nodetype) != JFFS2_NODETYPE_XATTR || je32_to_cpu(rx.totlen) != totlen || je32_to_cpu(rx.xid) != xd->xid || je32_to_cpu(rx.version) != xd->version) { JFFS2_ERROR("inconsistent xdatum at %#08x, magic=%#04x/%#04x, " "nodetype=%#04x/%#04x, totlen=%u/%u, xid=%u/%u, version=%u/%u ", |
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offset, je16_to_cpu(rx.magic), JFFS2_MAGIC_BITMASK, |
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je16_to_cpu(rx.nodetype), JFFS2_NODETYPE_XATTR, je32_to_cpu(rx.totlen), totlen, je32_to_cpu(rx.xid), xd->xid, je32_to_cpu(rx.version), xd->version); |
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xd->flags |= JFFS2_XFLAGS_INVALID; |
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return JFFS2_XATTR_IS_CORRUPTED; |
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} xd->xprefix = rx.xprefix; xd->name_len = rx.name_len; xd->value_len = je16_to_cpu(rx.value_len); xd->data_crc = je32_to_cpu(rx.data_crc); |
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spin_lock(&c->erase_completion_lock); |
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complete: for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { jeb = &c->blocks[ref_offset(raw) / c->sector_size]; totlen = PAD(ref_totlen(c, jeb, raw)); if (ref_flags(raw) == REF_UNCHECKED) { c->unchecked_size -= totlen; c->used_size += totlen; jeb->unchecked_size -= totlen; jeb->used_size += totlen; } raw->flash_offset = ref_offset(raw) | ((xd->node==raw) ? REF_PRISTINE : REF_NORMAL); } |
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spin_unlock(&c->erase_completion_lock); /* unchecked xdatum is chained with c->xattr_unchecked */ list_del_init(&xd->xindex); |
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dbg_xattr("success on verifying xdatum (xid=%u, version=%u) ", |
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xd->xid, xd->version); return 0; } static int do_load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) { /* must be called under down_write(xattr_sem) */ char *data; size_t readlen; uint32_t crc, length; int i, ret, retry = 0; |
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BUG_ON(ref_flags(xd->node) != REF_PRISTINE); BUG_ON(!list_empty(&xd->xindex)); retry: length = xd->name_len + 1 + xd->value_len; data = kmalloc(length, GFP_KERNEL); if (!data) return -ENOMEM; ret = jffs2_flash_read(c, ref_offset(xd->node)+sizeof(struct jffs2_raw_xattr), length, &readlen, data); if (ret || length!=readlen) { |
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JFFS2_WARNING("jffs2_flash_read() returned %d, request=%d, readlen=%zu, at %#08x ", |
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ret, length, readlen, ref_offset(xd->node)); kfree(data); return ret ? ret : -EIO; } data[xd->name_len] = '\0'; crc = crc32(0, data, length); if (crc != xd->data_crc) { |
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JFFS2_WARNING("node CRC failed (JFFS2_NODETYPE_XATTR)" |
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" at %#08x, read: 0x%08x calculated: 0x%08x ", ref_offset(xd->node), xd->data_crc, crc); kfree(data); |
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xd->flags |= JFFS2_XFLAGS_INVALID; |
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return JFFS2_XATTR_IS_CORRUPTED; |
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} xd->flags |= JFFS2_XFLAGS_HOT; xd->xname = data; xd->xvalue = data + xd->name_len+1; c->xdatum_mem_usage += length; xd->hashkey = xattr_datum_hashkey(xd->xprefix, xd->xname, xd->xvalue, xd->value_len); i = xd->hashkey % XATTRINDEX_HASHSIZE; list_add(&xd->xindex, &c->xattrindex[i]); if (!retry) { retry = 1; reclaim_xattr_datum(c); if (!xd->xname) goto retry; } dbg_xattr("success on loading xdatum (xid=%u, xprefix=%u, xname='%s') ", xd->xid, xd->xprefix, xd->xname); return 0; } static int load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) { /* must be called under down_write(xattr_sem); * rc < 0 : recoverable error, try again * rc = 0 : success * rc > 0 : Unrecoverable error, this node should be deleted. */ int rc = 0; |
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BUG_ON(xd->flags & JFFS2_XFLAGS_DEAD); |
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if (xd->xname) return 0; if (xd->flags & JFFS2_XFLAGS_INVALID) |
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return JFFS2_XATTR_IS_CORRUPTED; |
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if (unlikely(is_xattr_datum_unchecked(c, xd))) |
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rc = do_verify_xattr_datum(c, xd); |
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if (!rc) rc = do_load_xattr_datum(c, xd); return rc; } |
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static int save_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) |
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{ /* must be called under down_write(xattr_sem) */ |
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struct jffs2_raw_xattr rx; |
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struct kvec vecs[2]; |
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size_t length; |
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int rc, totlen; |
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uint32_t phys_ofs = write_ofs(c); |
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BUG_ON(!xd->xname); BUG_ON(xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID)); |
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vecs[0].iov_base = ℞ |
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vecs[0].iov_len = sizeof(rx); vecs[1].iov_base = xd->xname; vecs[1].iov_len = xd->name_len + 1 + xd->value_len; totlen = vecs[0].iov_len + vecs[1].iov_len; |
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/* Setup raw-xattr */ |
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memset(&rx, 0, sizeof(rx)); |
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rx.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); rx.nodetype = cpu_to_je16(JFFS2_NODETYPE_XATTR); rx.totlen = cpu_to_je32(PAD(totlen)); rx.hdr_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_unknown_node) - 4)); rx.xid = cpu_to_je32(xd->xid); |
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rx.version = cpu_to_je32(++xd->version); rx.xprefix = xd->xprefix; rx.name_len = xd->name_len; rx.value_len = cpu_to_je16(xd->value_len); rx.data_crc = cpu_to_je32(crc32(0, vecs[1].iov_base, vecs[1].iov_len)); |
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rx.node_crc = cpu_to_je32(crc32(0, &rx, sizeof(struct jffs2_raw_xattr) - 4)); |
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rc = jffs2_flash_writev(c, vecs, 2, phys_ofs, &length, 0); |
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if (rc || totlen != length) { |
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JFFS2_WARNING("jffs2_flash_writev()=%d, req=%u, wrote=%zu, at %#08x ", |
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rc, totlen, length, phys_ofs); rc = rc ? rc : -EIO; |
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if (length) jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(totlen), NULL); |
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return rc; } |
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/* success */ |
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jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(totlen), (void *)xd); |
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dbg_xattr("success on saving xdatum (xid=%u, version=%u, xprefix=%u, xname='%s') ", xd->xid, xd->version, xd->xprefix, xd->xname); return 0; } static struct jffs2_xattr_datum *create_xattr_datum(struct jffs2_sb_info *c, int xprefix, const char *xname, |
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const char *xvalue, int xsize) |
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{ /* must be called under down_write(xattr_sem) */ struct jffs2_xattr_datum *xd; uint32_t hashkey, name_len; char *data; int i, rc; /* Search xattr_datum has same xname/xvalue by index */ hashkey = xattr_datum_hashkey(xprefix, xname, xvalue, xsize); i = hashkey % XATTRINDEX_HASHSIZE; list_for_each_entry(xd, &c->xattrindex[i], xindex) { if (xd->hashkey==hashkey && xd->xprefix==xprefix && xd->value_len==xsize && !strcmp(xd->xname, xname) && !memcmp(xd->xvalue, xvalue, xsize)) { |
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atomic_inc(&xd->refcnt); |
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return xd; } } /* Not found, Create NEW XATTR-Cache */ name_len = strlen(xname); xd = jffs2_alloc_xattr_datum(); if (!xd) return ERR_PTR(-ENOMEM); data = kmalloc(name_len + 1 + xsize, GFP_KERNEL); if (!data) { jffs2_free_xattr_datum(xd); return ERR_PTR(-ENOMEM); } strcpy(data, xname); memcpy(data + name_len + 1, xvalue, xsize); |
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atomic_set(&xd->refcnt, 1); |
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xd->xid = ++c->highest_xid; xd->flags |= JFFS2_XFLAGS_HOT; xd->xprefix = xprefix; xd->hashkey = hashkey; xd->xname = data; xd->xvalue = data + name_len + 1; xd->name_len = name_len; xd->value_len = xsize; xd->data_crc = crc32(0, data, xd->name_len + 1 + xd->value_len); |
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rc = save_xattr_datum(c, xd); |
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if (rc) { kfree(xd->xname); jffs2_free_xattr_datum(xd); return ERR_PTR(rc); } /* Insert Hash Index */ i = hashkey % XATTRINDEX_HASHSIZE; list_add(&xd->xindex, &c->xattrindex[i]); c->xdatum_mem_usage += (xd->name_len + 1 + xd->value_len); reclaim_xattr_datum(c); return xd; } |
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static void unrefer_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) |
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{ /* must be called under down_write(xattr_sem) */ |
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if (atomic_dec_and_lock(&xd->refcnt, &c->erase_completion_lock)) { |
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403 404 405 406 407 408 409 410 411 |
unload_xattr_datum(c, xd); xd->flags |= JFFS2_XFLAGS_DEAD; if (xd->node == (void *)xd) { BUG_ON(!(xd->flags & JFFS2_XFLAGS_INVALID)); jffs2_free_xattr_datum(xd); } else { list_add(&xd->xindex, &c->xattr_dead_list); } spin_unlock(&c->erase_completion_lock); |
a6b1d82d0 [JFFS2] kill warn... |
412 413 414 |
dbg_xattr("xdatum(xid=%u, version=%u) was removed. ", xd->xid, xd->version); |
c9f700f84 [JFFS2][XATTR] us... |
415 |
} |
c9f700f84 [JFFS2][XATTR] us... |
416 |
} |
21b9879bf [JFFS2][XATTR] Fi... |
417 |
/* -------- xref related functions ------------------ |
aa98d7cf5 [JFFS2][XATTR] XA... |
418 419 420 |
* verify_xattr_ref(c, ref) * is used to load xref information from medium. Because summary data does not * contain xid/ino, it's necessary to verify once while mounting process. |
9fe4854cd [JFFS2] Remove fl... |
421 |
* save_xattr_ref(c, ref) |
8a13695cb [JFFS2][XATTR] ri... |
422 423 |
* is used to write xref to medium. If delete marker is marked, it write * a delete marker of xref into medium. |
9fe4854cd [JFFS2] Remove fl... |
424 |
* create_xattr_ref(c, ic, xd) |
aa98d7cf5 [JFFS2][XATTR] XA... |
425 |
* is used to create a new xref and write to medium. |
8a13695cb [JFFS2][XATTR] ri... |
426 427 428 |
* delete_xattr_ref(c, ref) * is used to delete jffs2_xattr_ref. It marks xref XREF_DELETE_MARKER, * and allows GC to reclaim those physical nodes. |
aa98d7cf5 [JFFS2][XATTR] XA... |
429 430 431 432 |
* jffs2_xattr_delete_inode(c, ic) * is called to remove xrefs related to obsolete inode when inode is unlinked. * jffs2_xattr_free_inode(c, ic) * is called to release xattr related objects when unmounting. |
8f2b6f49c [JFFS2][XATTR] Re... |
433 |
* check_xattr_ref_inode(c, ic) |
aa98d7cf5 [JFFS2][XATTR] XA... |
434 |
* is used to confirm inode does not have duplicate xattr name/value pair. |
8c5a03664 jffs2: allow to c... |
435 436 |
* jffs2_xattr_do_crccheck_inode(c, ic) * is used to force xattr data integrity check during the initial gc scan. |
aa98d7cf5 [JFFS2][XATTR] XA... |
437 438 439 440 |
* -------------------------------------------------- */ static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) { struct jffs2_eraseblock *jeb; |
c9f700f84 [JFFS2][XATTR] us... |
441 |
struct jffs2_raw_node_ref *raw; |
aa98d7cf5 [JFFS2][XATTR] XA... |
442 443 |
struct jffs2_raw_xref rr; size_t readlen; |
c9f700f84 [JFFS2][XATTR] us... |
444 |
uint32_t crc, offset, totlen; |
aa98d7cf5 [JFFS2][XATTR] XA... |
445 |
int rc; |
c9f700f84 [JFFS2][XATTR] us... |
446 447 448 449 450 |
spin_lock(&c->erase_completion_lock); if (ref_flags(ref->node) != REF_UNCHECKED) goto complete; offset = ref_offset(ref->node); spin_unlock(&c->erase_completion_lock); |
aa98d7cf5 [JFFS2][XATTR] XA... |
451 |
|
c9f700f84 [JFFS2][XATTR] us... |
452 |
rc = jffs2_flash_read(c, offset, sizeof(rr), &readlen, (char *)&rr); |
aa98d7cf5 [JFFS2][XATTR] XA... |
453 |
if (rc || sizeof(rr) != readlen) { |
89291a9d5 [JFFS2] Fix 64-bi... |
454 455 |
JFFS2_WARNING("jffs2_flash_read()=%d, req=%zu, read=%zu, at %#08x ", |
c9f700f84 [JFFS2][XATTR] us... |
456 |
rc, sizeof(rr), readlen, offset); |
aa98d7cf5 [JFFS2][XATTR] XA... |
457 458 459 460 461 |
return rc ? rc : -EIO; } /* obsolete node */ crc = crc32(0, &rr, sizeof(rr) - 4); if (crc != je32_to_cpu(rr.node_crc)) { |
c9f700f84 [JFFS2][XATTR] us... |
462 463 464 |
JFFS2_ERROR("node CRC failed at %#08x, read=%#08x, calc=%#08x ", offset, je32_to_cpu(rr.node_crc), crc); |
9824f75d5 jffs2: allow to d... |
465 |
return JFFS2_XATTR_IS_CORRUPTED; |
aa98d7cf5 [JFFS2][XATTR] XA... |
466 467 468 469 470 |
} if (je16_to_cpu(rr.magic) != JFFS2_MAGIC_BITMASK || je16_to_cpu(rr.nodetype) != JFFS2_NODETYPE_XREF || je32_to_cpu(rr.totlen) != PAD(sizeof(rr))) { JFFS2_ERROR("inconsistent xref at %#08x, magic=%#04x/%#04x, " |
89291a9d5 [JFFS2] Fix 64-bi... |
471 472 |
"nodetype=%#04x/%#04x, totlen=%u/%zu ", |
c9f700f84 [JFFS2][XATTR] us... |
473 |
offset, je16_to_cpu(rr.magic), JFFS2_MAGIC_BITMASK, |
aa98d7cf5 [JFFS2][XATTR] XA... |
474 475 |
je16_to_cpu(rr.nodetype), JFFS2_NODETYPE_XREF, je32_to_cpu(rr.totlen), PAD(sizeof(rr))); |
9824f75d5 jffs2: allow to d... |
476 |
return JFFS2_XATTR_IS_CORRUPTED; |
aa98d7cf5 [JFFS2][XATTR] XA... |
477 478 479 |
} ref->ino = je32_to_cpu(rr.ino); ref->xid = je32_to_cpu(rr.xid); |
c9f700f84 [JFFS2][XATTR] us... |
480 481 482 |
ref->xseqno = je32_to_cpu(rr.xseqno); if (ref->xseqno > c->highest_xseqno) c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER); |
aa98d7cf5 [JFFS2][XATTR] XA... |
483 484 |
spin_lock(&c->erase_completion_lock); |
c9f700f84 [JFFS2][XATTR] us... |
485 486 487 488 489 490 491 492 493 494 |
complete: for (raw=ref->node; raw != (void *)ref; raw=raw->next_in_ino) { jeb = &c->blocks[ref_offset(raw) / c->sector_size]; totlen = PAD(ref_totlen(c, jeb, raw)); if (ref_flags(raw) == REF_UNCHECKED) { c->unchecked_size -= totlen; c->used_size += totlen; jeb->unchecked_size -= totlen; jeb->used_size += totlen; } raw->flash_offset = ref_offset(raw) | ((ref->node==raw) ? REF_PRISTINE : REF_NORMAL); } |
aa98d7cf5 [JFFS2][XATTR] XA... |
495 496 497 498 499 500 501 |
spin_unlock(&c->erase_completion_lock); dbg_xattr("success on verifying xref (ino=%u, xid=%u) at %#08x ", ref->ino, ref->xid, ref_offset(ref->node)); return 0; } |
9fe4854cd [JFFS2] Remove fl... |
502 |
static int save_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) |
aa98d7cf5 [JFFS2][XATTR] XA... |
503 504 |
{ /* must be called under down_write(xattr_sem) */ |
aa98d7cf5 [JFFS2][XATTR] XA... |
505 |
struct jffs2_raw_xref rr; |
89291a9d5 [JFFS2] Fix 64-bi... |
506 |
size_t length; |
c9f700f84 [JFFS2][XATTR] us... |
507 |
uint32_t xseqno, phys_ofs = write_ofs(c); |
aa98d7cf5 [JFFS2][XATTR] XA... |
508 |
int ret; |
aa98d7cf5 [JFFS2][XATTR] XA... |
509 510 511 512 |
rr.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); rr.nodetype = cpu_to_je16(JFFS2_NODETYPE_XREF); rr.totlen = cpu_to_je32(PAD(sizeof(rr))); rr.hdr_crc = cpu_to_je32(crc32(0, &rr, sizeof(struct jffs2_unknown_node) - 4)); |
c9f700f84 [JFFS2][XATTR] us... |
513 514 515 516 517 518 519 520 521 522 |
xseqno = (c->highest_xseqno += 2); if (is_xattr_ref_dead(ref)) { xseqno |= XREF_DELETE_MARKER; rr.ino = cpu_to_je32(ref->ino); rr.xid = cpu_to_je32(ref->xid); } else { rr.ino = cpu_to_je32(ref->ic->ino); rr.xid = cpu_to_je32(ref->xd->xid); } rr.xseqno = cpu_to_je32(xseqno); |
aa98d7cf5 [JFFS2][XATTR] XA... |
523 524 525 526 |
rr.node_crc = cpu_to_je32(crc32(0, &rr, sizeof(rr) - 4)); ret = jffs2_flash_write(c, phys_ofs, sizeof(rr), &length, (char *)&rr); if (ret || sizeof(rr) != length) { |
89291a9d5 [JFFS2] Fix 64-bi... |
527 528 |
JFFS2_WARNING("jffs2_flash_write() returned %d, request=%zu, retlen=%zu, at %#08x ", |
aa98d7cf5 [JFFS2][XATTR] XA... |
529 530 |
ret, sizeof(rr), length, phys_ofs); ret = ret ? ret : -EIO; |
2f785402f [JFFS2] Reduce vi... |
531 532 |
if (length) jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(sizeof(rr)), NULL); |
aa98d7cf5 [JFFS2][XATTR] XA... |
533 534 |
return ret; } |
c9f700f84 [JFFS2][XATTR] us... |
535 536 537 |
/* success */ ref->xseqno = xseqno; jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(sizeof(rr)), (void *)ref); |
aa98d7cf5 [JFFS2][XATTR] XA... |
538 539 540 541 542 543 544 545 |
dbg_xattr("success on saving xref (ino=%u, xid=%u) ", ref->ic->ino, ref->xd->xid); return 0; } static struct jffs2_xattr_ref *create_xattr_ref(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, |
9fe4854cd [JFFS2] Remove fl... |
546 |
struct jffs2_xattr_datum *xd) |
aa98d7cf5 [JFFS2][XATTR] XA... |
547 548 549 550 551 552 553 554 555 556 |
{ /* must be called under down_write(xattr_sem) */ struct jffs2_xattr_ref *ref; int ret; ref = jffs2_alloc_xattr_ref(); if (!ref) return ERR_PTR(-ENOMEM); ref->ic = ic; ref->xd = xd; |
9fe4854cd [JFFS2] Remove fl... |
557 |
ret = save_xattr_ref(c, ref); |
aa98d7cf5 [JFFS2][XATTR] XA... |
558 559 560 561 562 563 |
if (ret) { jffs2_free_xattr_ref(ref); return ERR_PTR(ret); } /* Chain to inode */ |
8f2b6f49c [JFFS2][XATTR] Re... |
564 565 |
ref->next = ic->xref; ic->xref = ref; |
aa98d7cf5 [JFFS2][XATTR] XA... |
566 567 568 |
return ref; /* success */ } |
8a13695cb [JFFS2][XATTR] ri... |
569 |
static void delete_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) |
c9f700f84 [JFFS2][XATTR] us... |
570 571 572 |
{ /* must be called under down_write(xattr_sem) */ struct jffs2_xattr_datum *xd; |
c9f700f84 [JFFS2][XATTR] us... |
573 |
xd = ref->xd; |
8a13695cb [JFFS2][XATTR] ri... |
574 |
ref->xseqno |= XREF_DELETE_MARKER; |
c9f700f84 [JFFS2][XATTR] us... |
575 576 577 578 579 580 |
ref->ino = ref->ic->ino; ref->xid = ref->xd->xid; spin_lock(&c->erase_completion_lock); ref->next = c->xref_dead_list; c->xref_dead_list = ref; spin_unlock(&c->erase_completion_lock); |
8a13695cb [JFFS2][XATTR] ri... |
581 582 583 |
dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) was removed. ", ref->ino, ref->xid, ref->xseqno); |
c9f700f84 [JFFS2][XATTR] us... |
584 |
|
c6e8c6ccf [JFFS2][XATTR] Fi... |
585 |
unrefer_xattr_datum(c, xd); |
c9f700f84 [JFFS2][XATTR] us... |
586 |
} |
aa98d7cf5 [JFFS2][XATTR] XA... |
587 588 |
void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) { |
b57922d97 convert remaining... |
589 |
/* It's called from jffs2_evict_inode() on inode removing. |
aa98d7cf5 [JFFS2][XATTR] XA... |
590 |
When an inode with XATTR is removed, those XATTRs must be removed. */ |
8a13695cb [JFFS2][XATTR] ri... |
591 |
struct jffs2_xattr_ref *ref, *_ref; |
aa98d7cf5 [JFFS2][XATTR] XA... |
592 |
|
27c72b040 [JFFS2] Track par... |
593 |
if (!ic || ic->pino_nlink > 0) |
aa98d7cf5 [JFFS2][XATTR] XA... |
594 595 596 |
return; down_write(&c->xattr_sem); |
8a13695cb [JFFS2][XATTR] ri... |
597 598 599 |
for (ref = ic->xref; ref; ref = _ref) { _ref = ref->next; delete_xattr_ref(c, ref); |
8f2b6f49c [JFFS2][XATTR] Re... |
600 |
} |
8a13695cb [JFFS2][XATTR] ri... |
601 |
ic->xref = NULL; |
aa98d7cf5 [JFFS2][XATTR] XA... |
602 603 604 605 606 607 608 609 610 611 |
up_write(&c->xattr_sem); } void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) { /* It's called from jffs2_free_ino_caches() until unmounting FS. */ struct jffs2_xattr_datum *xd; struct jffs2_xattr_ref *ref, *_ref; down_write(&c->xattr_sem); |
8f2b6f49c [JFFS2][XATTR] Re... |
612 613 |
for (ref = ic->xref; ref; ref = _ref) { _ref = ref->next; |
aa98d7cf5 [JFFS2][XATTR] XA... |
614 |
xd = ref->xd; |
2c887e235 [JFFS2][XATTR] Re... |
615 |
if (atomic_dec_and_test(&xd->refcnt)) { |
aa98d7cf5 [JFFS2][XATTR] XA... |
616 617 618 619 620 |
unload_xattr_datum(c, xd); jffs2_free_xattr_datum(xd); } jffs2_free_xattr_ref(ref); } |
8f2b6f49c [JFFS2][XATTR] Re... |
621 |
ic->xref = NULL; |
aa98d7cf5 [JFFS2][XATTR] XA... |
622 623 |
up_write(&c->xattr_sem); } |
8f2b6f49c [JFFS2][XATTR] Re... |
624 |
static int check_xattr_ref_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) |
aa98d7cf5 [JFFS2][XATTR] XA... |
625 |
{ |
a4ce96ac3 Fix up trivial sp... |
626 |
/* success of check_xattr_ref_inode() means that inode (ic) dose not have |
aa98d7cf5 [JFFS2][XATTR] XA... |
627 628 629 |
* duplicate name/value pairs. If duplicate name/value pair would be found, * one will be removed. */ |
c9f700f84 [JFFS2][XATTR] us... |
630 |
struct jffs2_xattr_ref *ref, *cmp, **pref, **pcmp; |
aa98d7cf5 [JFFS2][XATTR] XA... |
631 632 633 634 635 636 637 |
int rc = 0; if (likely(ic->flags & INO_FLAGS_XATTR_CHECKED)) return 0; down_write(&c->xattr_sem); retry: rc = 0; |
8f2b6f49c [JFFS2][XATTR] Re... |
638 |
for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { |
aa98d7cf5 [JFFS2][XATTR] XA... |
639 640 641 |
if (!ref->xd->xname) { rc = load_xattr_datum(c, ref->xd); if (unlikely(rc > 0)) { |
8f2b6f49c [JFFS2][XATTR] Re... |
642 |
*pref = ref->next; |
8a13695cb [JFFS2][XATTR] ri... |
643 |
delete_xattr_ref(c, ref); |
aa98d7cf5 [JFFS2][XATTR] XA... |
644 645 646 647 |
goto retry; } else if (unlikely(rc < 0)) goto out; } |
c9f700f84 [JFFS2][XATTR] us... |
648 |
for (cmp=ref->next, pcmp=&ref->next; cmp; pcmp=&cmp->next, cmp=cmp->next) { |
aa98d7cf5 [JFFS2][XATTR] XA... |
649 650 651 652 653 |
if (!cmp->xd->xname) { ref->xd->flags |= JFFS2_XFLAGS_BIND; rc = load_xattr_datum(c, cmp->xd); ref->xd->flags &= ~JFFS2_XFLAGS_BIND; if (unlikely(rc > 0)) { |
c9f700f84 [JFFS2][XATTR] us... |
654 |
*pcmp = cmp->next; |
8a13695cb [JFFS2][XATTR] ri... |
655 |
delete_xattr_ref(c, cmp); |
aa98d7cf5 [JFFS2][XATTR] XA... |
656 657 658 659 660 661 |
goto retry; } else if (unlikely(rc < 0)) goto out; } if (ref->xd->xprefix == cmp->xd->xprefix && !strcmp(ref->xd->xname, cmp->xd->xname)) { |
c9f700f84 [JFFS2][XATTR] us... |
662 663 |
if (ref->xseqno > cmp->xseqno) { *pcmp = cmp->next; |
8a13695cb [JFFS2][XATTR] ri... |
664 |
delete_xattr_ref(c, cmp); |
c9f700f84 [JFFS2][XATTR] us... |
665 666 |
} else { *pref = ref->next; |
8a13695cb [JFFS2][XATTR] ri... |
667 |
delete_xattr_ref(c, ref); |
c9f700f84 [JFFS2][XATTR] us... |
668 |
} |
aa98d7cf5 [JFFS2][XATTR] XA... |
669 670 671 672 673 674 675 676 677 678 |
goto retry; } } } ic->flags |= INO_FLAGS_XATTR_CHECKED; out: up_write(&c->xattr_sem); return rc; } |
8c5a03664 jffs2: allow to c... |
679 680 681 682 |
void jffs2_xattr_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic) { check_xattr_ref_inode(c, ic); } |
aa98d7cf5 [JFFS2][XATTR] XA... |
683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 |
/* -------- xattr subsystem functions --------------- * jffs2_init_xattr_subsystem(c) * is used to initialize semaphore and list_head, and some variables. * jffs2_find_xattr_datum(c, xid) * is used to lookup xdatum while scanning process. * jffs2_clear_xattr_subsystem(c) * is used to release any xattr related objects. * jffs2_build_xattr_subsystem(c) * is used to associate xdatum and xref while super block building process. * jffs2_setup_xattr_datum(c, xid, version) * is used to insert xdatum while scanning process. * -------------------------------------------------- */ void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c) { int i; for (i=0; i < XATTRINDEX_HASHSIZE; i++) INIT_LIST_HEAD(&c->xattrindex[i]); |
aa98d7cf5 [JFFS2][XATTR] XA... |
701 |
INIT_LIST_HEAD(&c->xattr_unchecked); |
c9f700f84 [JFFS2][XATTR] us... |
702 703 |
INIT_LIST_HEAD(&c->xattr_dead_list); c->xref_dead_list = NULL; |
8f2b6f49c [JFFS2][XATTR] Re... |
704 |
c->xref_temp = NULL; |
aa98d7cf5 [JFFS2][XATTR] XA... |
705 706 |
init_rwsem(&c->xattr_sem); |
c9f700f84 [JFFS2][XATTR] us... |
707 708 |
c->highest_xid = 0; c->highest_xseqno = 0; |
aa98d7cf5 [JFFS2][XATTR] XA... |
709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 |
c->xdatum_mem_usage = 0; c->xdatum_mem_threshold = 32 * 1024; /* Default 32KB */ } static struct jffs2_xattr_datum *jffs2_find_xattr_datum(struct jffs2_sb_info *c, uint32_t xid) { struct jffs2_xattr_datum *xd; int i = xid % XATTRINDEX_HASHSIZE; /* It's only used in scanning/building process. */ BUG_ON(!(c->flags & (JFFS2_SB_FLAG_SCANNING|JFFS2_SB_FLAG_BUILDING))); list_for_each_entry(xd, &c->xattrindex[i], xindex) { if (xd->xid==xid) return xd; } return NULL; } void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c) { struct jffs2_xattr_datum *xd, *_xd; struct jffs2_xattr_ref *ref, *_ref; int i; |
8f2b6f49c [JFFS2][XATTR] Re... |
733 734 |
for (ref=c->xref_temp; ref; ref = _ref) { _ref = ref->next; |
aa98d7cf5 [JFFS2][XATTR] XA... |
735 |
jffs2_free_xattr_ref(ref); |
8f2b6f49c [JFFS2][XATTR] Re... |
736 |
} |
c9f700f84 [JFFS2][XATTR] us... |
737 738 739 740 741 |
for (ref=c->xref_dead_list; ref; ref = _ref) { _ref = ref->next; jffs2_free_xattr_ref(ref); } |
aa98d7cf5 [JFFS2][XATTR] XA... |
742 743 744 745 |
for (i=0; i < XATTRINDEX_HASHSIZE; i++) { list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { list_del(&xd->xindex); |
086f2f76f fs/jffs2/xattr.c:... |
746 |
kfree(xd->xname); |
aa98d7cf5 [JFFS2][XATTR] XA... |
747 748 749 |
jffs2_free_xattr_datum(xd); } } |
c9f700f84 [JFFS2][XATTR] us... |
750 751 752 753 754 |
list_for_each_entry_safe(xd, _xd, &c->xattr_dead_list, xindex) { list_del(&xd->xindex); jffs2_free_xattr_datum(xd); } |
2ad8ee713 [JFFS2] Fix poten... |
755 756 757 758 |
list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) { list_del(&xd->xindex); jffs2_free_xattr_datum(xd); } |
aa98d7cf5 [JFFS2][XATTR] XA... |
759 |
} |
c9f700f84 [JFFS2][XATTR] us... |
760 |
#define XREF_TMPHASH_SIZE (128) |
aa98d7cf5 [JFFS2][XATTR] XA... |
761 762 763 |
void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c) { struct jffs2_xattr_ref *ref, *_ref; |
c9f700f84 [JFFS2][XATTR] us... |
764 |
struct jffs2_xattr_ref *xref_tmphash[XREF_TMPHASH_SIZE]; |
aa98d7cf5 [JFFS2][XATTR] XA... |
765 766 |
struct jffs2_xattr_datum *xd, *_xd; struct jffs2_inode_cache *ic; |
c9f700f84 [JFFS2][XATTR] us... |
767 768 |
struct jffs2_raw_node_ref *raw; int i, xdatum_count = 0, xdatum_unchecked_count = 0, xref_count = 0; |
8a13695cb [JFFS2][XATTR] ri... |
769 |
int xdatum_orphan_count = 0, xref_orphan_count = 0, xref_dead_count = 0; |
aa98d7cf5 [JFFS2][XATTR] XA... |
770 771 |
BUG_ON(!(c->flags & JFFS2_SB_FLAG_BUILDING)); |
8a13695cb [JFFS2][XATTR] ri... |
772 |
/* Phase.1 : Merge same xref */ |
c9f700f84 [JFFS2][XATTR] us... |
773 774 |
for (i=0; i < XREF_TMPHASH_SIZE; i++) xref_tmphash[i] = NULL; |
8f2b6f49c [JFFS2][XATTR] Re... |
775 |
for (ref=c->xref_temp; ref; ref=_ref) { |
c9f700f84 [JFFS2][XATTR] us... |
776 |
struct jffs2_xattr_ref *tmp; |
8f2b6f49c [JFFS2][XATTR] Re... |
777 |
_ref = ref->next; |
aa98d7cf5 [JFFS2][XATTR] XA... |
778 779 |
if (ref_flags(ref->node) != REF_PRISTINE) { if (verify_xattr_ref(c, ref)) { |
c9f700f84 [JFFS2][XATTR] us... |
780 781 782 |
BUG_ON(ref->node->next_in_ino != (void *)ref); ref->node->next_in_ino = NULL; jffs2_mark_node_obsolete(c, ref->node); |
aa98d7cf5 [JFFS2][XATTR] XA... |
783 784 785 786 |
jffs2_free_xattr_ref(ref); continue; } } |
c9f700f84 [JFFS2][XATTR] us... |
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 |
i = (ref->ino ^ ref->xid) % XREF_TMPHASH_SIZE; for (tmp=xref_tmphash[i]; tmp; tmp=tmp->next) { if (tmp->ino == ref->ino && tmp->xid == ref->xid) break; } if (tmp) { raw = ref->node; if (ref->xseqno > tmp->xseqno) { tmp->xseqno = ref->xseqno; raw->next_in_ino = tmp->node; tmp->node = raw; } else { raw->next_in_ino = tmp->node->next_in_ino; tmp->node->next_in_ino = raw; } |
aa98d7cf5 [JFFS2][XATTR] XA... |
803 804 |
jffs2_free_xattr_ref(ref); continue; |
c9f700f84 [JFFS2][XATTR] us... |
805 806 807 |
} else { ref->next = xref_tmphash[i]; xref_tmphash[i] = ref; |
aa98d7cf5 [JFFS2][XATTR] XA... |
808 |
} |
aa98d7cf5 [JFFS2][XATTR] XA... |
809 |
} |
8f2b6f49c [JFFS2][XATTR] Re... |
810 |
c->xref_temp = NULL; |
aa98d7cf5 [JFFS2][XATTR] XA... |
811 |
|
8a13695cb [JFFS2][XATTR] ri... |
812 |
/* Phase.2 : Bind xref with inode_cache and xattr_datum */ |
c9f700f84 [JFFS2][XATTR] us... |
813 814 |
for (i=0; i < XREF_TMPHASH_SIZE; i++) { for (ref=xref_tmphash[i]; ref; ref=_ref) { |
8a13695cb [JFFS2][XATTR] ri... |
815 |
xref_count++; |
c9f700f84 [JFFS2][XATTR] us... |
816 817 818 819 |
_ref = ref->next; if (is_xattr_ref_dead(ref)) { ref->next = c->xref_dead_list; c->xref_dead_list = ref; |
8a13695cb [JFFS2][XATTR] ri... |
820 |
xref_dead_count++; |
c9f700f84 [JFFS2][XATTR] us... |
821 822 823 824 825 826 |
continue; } /* At this point, ref->xid and ref->ino contain XID and inode number. ref->xd and ref->ic are not valid yet. */ xd = jffs2_find_xattr_datum(c, ref->xid); ic = jffs2_get_ino_cache(c, ref->ino); |
27c72b040 [JFFS2] Track par... |
827 |
if (!xd || !ic || !ic->pino_nlink) { |
8a13695cb [JFFS2][XATTR] ri... |
828 829 830 831 |
dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) is orphan. ", ref->ino, ref->xid, ref->xseqno); ref->xseqno |= XREF_DELETE_MARKER; |
c9f700f84 [JFFS2][XATTR] us... |
832 833 |
ref->next = c->xref_dead_list; c->xref_dead_list = ref; |
8a13695cb [JFFS2][XATTR] ri... |
834 |
xref_orphan_count++; |
c9f700f84 [JFFS2][XATTR] us... |
835 836 837 838 |
continue; } ref->xd = xd; ref->ic = ic; |
2c887e235 [JFFS2][XATTR] Re... |
839 |
atomic_inc(&xd->refcnt); |
c9f700f84 [JFFS2][XATTR] us... |
840 841 |
ref->next = ic->xref; ic->xref = ref; |
c9f700f84 [JFFS2][XATTR] us... |
842 843 |
} } |
8a13695cb [JFFS2][XATTR] ri... |
844 |
/* Phase.3 : Link unchecked xdatum to xattr_unchecked list */ |
aa98d7cf5 [JFFS2][XATTR] XA... |
845 846 |
for (i=0; i < XATTRINDEX_HASHSIZE; i++) { list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) { |
8a13695cb [JFFS2][XATTR] ri... |
847 |
xdatum_count++; |
aa98d7cf5 [JFFS2][XATTR] XA... |
848 |
list_del_init(&xd->xindex); |
2c887e235 [JFFS2][XATTR] Re... |
849 |
if (!atomic_read(&xd->refcnt)) { |
8a13695cb [JFFS2][XATTR] ri... |
850 851 852 853 |
dbg_xattr("xdatum(xid=%u, version=%u) is orphan. ", xd->xid, xd->version); xd->flags |= JFFS2_XFLAGS_DEAD; |
c9f700f84 [JFFS2][XATTR] us... |
854 |
list_add(&xd->xindex, &c->xattr_unchecked); |
8a13695cb [JFFS2][XATTR] ri... |
855 |
xdatum_orphan_count++; |
aa98d7cf5 [JFFS2][XATTR] XA... |
856 857 |
continue; } |
c9f700f84 [JFFS2][XATTR] us... |
858 859 860 861 |
if (is_xattr_datum_unchecked(c, xd)) { dbg_xattr("unchecked xdatum(xid=%u, version=%u) ", xd->xid, xd->version); |
aa98d7cf5 [JFFS2][XATTR] XA... |
862 863 864 |
list_add(&xd->xindex, &c->xattr_unchecked); xdatum_unchecked_count++; } |
aa98d7cf5 [JFFS2][XATTR] XA... |
865 866 867 |
} } /* build complete */ |
8a13695cb [JFFS2][XATTR] ri... |
868 869 870 871 872 873 |
JFFS2_NOTICE("complete building xattr subsystem, %u of xdatum" " (%u unchecked, %u orphan) and " "%u of xref (%u dead, %u orphan) found. ", xdatum_count, xdatum_unchecked_count, xdatum_orphan_count, xref_count, xref_dead_count, xref_orphan_count); |
aa98d7cf5 [JFFS2][XATTR] XA... |
874 875 876 877 878 |
} struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c, uint32_t xid, uint32_t version) { |
c9f700f84 [JFFS2][XATTR] us... |
879 |
struct jffs2_xattr_datum *xd; |
aa98d7cf5 [JFFS2][XATTR] XA... |
880 |
|
c9f700f84 [JFFS2][XATTR] us... |
881 882 883 884 885 886 887 888 889 890 |
xd = jffs2_find_xattr_datum(c, xid); if (!xd) { xd = jffs2_alloc_xattr_datum(); if (!xd) return ERR_PTR(-ENOMEM); xd->xid = xid; xd->version = version; if (xd->xid > c->highest_xid) c->highest_xid = xd->xid; list_add_tail(&xd->xindex, &c->xattrindex[xid % XATTRINDEX_HASHSIZE]); |
aa98d7cf5 [JFFS2][XATTR] XA... |
891 892 893 894 895 896 897 898 899 900 901 902 903 904 |
} return xd; } /* -------- xattr subsystem functions --------------- * xprefix_to_handler(xprefix) * is used to translate xprefix into xattr_handler. * jffs2_listxattr(dentry, buffer, size) * is an implementation of listxattr handler on jffs2. * do_jffs2_getxattr(inode, xprefix, xname, buffer, size) * is an implementation of getxattr handler on jffs2. * do_jffs2_setxattr(inode, xprefix, xname, buffer, size, flags) * is an implementation of setxattr handler on jffs2. * -------------------------------------------------- */ |
365f0cb9d jffs2: constify x... |
905 |
const struct xattr_handler *jffs2_xattr_handlers[] = { |
aa98d7cf5 [JFFS2][XATTR] XA... |
906 907 908 909 910 |
&jffs2_user_xattr_handler, #ifdef CONFIG_JFFS2_FS_SECURITY &jffs2_security_xattr_handler, #endif #ifdef CONFIG_JFFS2_FS_POSIX_ACL |
f2963d455 jffs2: use generi... |
911 912 |
&posix_acl_access_xattr_handler, &posix_acl_default_xattr_handler, |
aa98d7cf5 [JFFS2][XATTR] XA... |
913 914 915 916 |
#endif &jffs2_trusted_xattr_handler, NULL }; |
365f0cb9d jffs2: constify x... |
917 918 |
static const struct xattr_handler *xprefix_to_handler(int xprefix) { const struct xattr_handler *ret; |
aa98d7cf5 [JFFS2][XATTR] XA... |
919 920 921 922 923 924 925 926 927 928 929 930 |
switch (xprefix) { case JFFS2_XPREFIX_USER: ret = &jffs2_user_xattr_handler; break; #ifdef CONFIG_JFFS2_FS_SECURITY case JFFS2_XPREFIX_SECURITY: ret = &jffs2_security_xattr_handler; break; #endif #ifdef CONFIG_JFFS2_FS_POSIX_ACL case JFFS2_XPREFIX_ACL_ACCESS: |
f2963d455 jffs2: use generi... |
931 |
ret = &posix_acl_access_xattr_handler; |
aa98d7cf5 [JFFS2][XATTR] XA... |
932 933 |
break; case JFFS2_XPREFIX_ACL_DEFAULT: |
f2963d455 jffs2: use generi... |
934 |
ret = &posix_acl_default_xattr_handler; |
aa98d7cf5 [JFFS2][XATTR] XA... |
935 936 937 938 939 940 941 942 943 944 945 946 947 948 |
break; #endif case JFFS2_XPREFIX_TRUSTED: ret = &jffs2_trusted_xattr_handler; break; default: ret = NULL; break; } return ret; } ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size) { |
2b0143b5c VFS: normal files... |
949 |
struct inode *inode = d_inode(dentry); |
aa98d7cf5 [JFFS2][XATTR] XA... |
950 951 952 |
struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); struct jffs2_inode_cache *ic = f->inocache; |
8f2b6f49c [JFFS2][XATTR] Re... |
953 |
struct jffs2_xattr_ref *ref, **pref; |
aa98d7cf5 [JFFS2][XATTR] XA... |
954 |
struct jffs2_xattr_datum *xd; |
365f0cb9d jffs2: constify x... |
955 |
const struct xattr_handler *xhandle; |
764a5c6b1 xattr handlers: S... |
956 957 |
const char *prefix; ssize_t prefix_len, len, rc; |
aa98d7cf5 [JFFS2][XATTR] XA... |
958 |
int retry = 0; |
8f2b6f49c [JFFS2][XATTR] Re... |
959 |
rc = check_xattr_ref_inode(c, ic); |
aa98d7cf5 [JFFS2][XATTR] XA... |
960 961 962 963 964 965 |
if (unlikely(rc)) return rc; down_read(&c->xattr_sem); retry: len = 0; |
8f2b6f49c [JFFS2][XATTR] Re... |
966 |
for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { |
aa98d7cf5 [JFFS2][XATTR] XA... |
967 968 969 970 971 972 973 974 975 976 977 978 |
BUG_ON(ref->ic != ic); xd = ref->xd; if (!xd->xname) { /* xdatum is unchached */ if (!retry) { retry = 1; up_read(&c->xattr_sem); down_write(&c->xattr_sem); goto retry; } else { rc = load_xattr_datum(c, xd); if (unlikely(rc > 0)) { |
8f2b6f49c [JFFS2][XATTR] Re... |
979 |
*pref = ref->next; |
8a13695cb [JFFS2][XATTR] ri... |
980 |
delete_xattr_ref(c, ref); |
aa98d7cf5 [JFFS2][XATTR] XA... |
981 982 983 984 985 986 |
goto retry; } else if (unlikely(rc < 0)) goto out; } } xhandle = xprefix_to_handler(xd->xprefix); |
764a5c6b1 xattr handlers: S... |
987 |
if (!xhandle || (xhandle->list && !xhandle->list(dentry))) |
aa98d7cf5 [JFFS2][XATTR] XA... |
988 |
continue; |
764a5c6b1 xattr handlers: S... |
989 990 991 |
prefix = xhandle->prefix ?: xhandle->name; prefix_len = strlen(prefix); rc = prefix_len + xd->name_len + 1; |
aa98d7cf5 [JFFS2][XATTR] XA... |
992 |
if (buffer) { |
764a5c6b1 xattr handlers: S... |
993 994 995 996 997 998 999 1000 1001 |
if (rc > size - len) { rc = -ERANGE; goto out; } memcpy(buffer, prefix, prefix_len); buffer += prefix_len; memcpy(buffer, xd->xname, xd->name_len); buffer += xd->name_len; *buffer++ = 0; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1002 |
} |
aa98d7cf5 [JFFS2][XATTR] XA... |
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 |
len += rc; } rc = len; out: if (!retry) { up_read(&c->xattr_sem); } else { up_write(&c->xattr_sem); } return rc; } int do_jffs2_getxattr(struct inode *inode, int xprefix, const char *xname, char *buffer, size_t size) { struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); struct jffs2_inode_cache *ic = f->inocache; struct jffs2_xattr_datum *xd; |
8f2b6f49c [JFFS2][XATTR] Re... |
1022 |
struct jffs2_xattr_ref *ref, **pref; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1023 |
int rc, retry = 0; |
8f2b6f49c [JFFS2][XATTR] Re... |
1024 |
rc = check_xattr_ref_inode(c, ic); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1025 1026 1027 1028 1029 |
if (unlikely(rc)) return rc; down_read(&c->xattr_sem); retry: |
8f2b6f49c [JFFS2][XATTR] Re... |
1030 |
for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { |
aa98d7cf5 [JFFS2][XATTR] XA... |
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 |
BUG_ON(ref->ic!=ic); xd = ref->xd; if (xd->xprefix != xprefix) continue; if (!xd->xname) { /* xdatum is unchached */ if (!retry) { retry = 1; up_read(&c->xattr_sem); down_write(&c->xattr_sem); goto retry; } else { rc = load_xattr_datum(c, xd); if (unlikely(rc > 0)) { |
8f2b6f49c [JFFS2][XATTR] Re... |
1046 |
*pref = ref->next; |
8a13695cb [JFFS2][XATTR] ri... |
1047 |
delete_xattr_ref(c, ref); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 |
goto retry; } else if (unlikely(rc < 0)) { goto out; } } } if (!strcmp(xname, xd->xname)) { rc = xd->value_len; if (buffer) { if (size < rc) { rc = -ERANGE; } else { memcpy(buffer, xd->xvalue, rc); } } goto out; } } rc = -ENODATA; out: if (!retry) { up_read(&c->xattr_sem); } else { up_write(&c->xattr_sem); } return rc; } int do_jffs2_setxattr(struct inode *inode, int xprefix, const char *xname, const char *buffer, size_t size, int flags) { struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); struct jffs2_inode_cache *ic = f->inocache; struct jffs2_xattr_datum *xd; |
8f2b6f49c [JFFS2][XATTR] Re... |
1083 |
struct jffs2_xattr_ref *ref, *newref, **pref; |
9fe4854cd [JFFS2] Remove fl... |
1084 |
uint32_t length, request; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1085 |
int rc; |
8f2b6f49c [JFFS2][XATTR] Re... |
1086 |
rc = check_xattr_ref_inode(c, ic); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1087 1088 1089 1090 |
if (unlikely(rc)) return rc; request = PAD(sizeof(struct jffs2_raw_xattr) + strlen(xname) + 1 + size); |
9fe4854cd [JFFS2] Remove fl... |
1091 |
rc = jffs2_reserve_space(c, request, &length, |
aa98d7cf5 [JFFS2][XATTR] XA... |
1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 |
ALLOC_NORMAL, JFFS2_SUMMARY_XATTR_SIZE); if (rc) { JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u ", rc, request); return rc; } /* Find existing xattr */ down_write(&c->xattr_sem); retry: |
8f2b6f49c [JFFS2][XATTR] Re... |
1102 |
for (ref=ic->xref, pref=&ic->xref; ref; pref=&ref->next, ref=ref->next) { |
aa98d7cf5 [JFFS2][XATTR] XA... |
1103 1104 1105 1106 1107 1108 |
xd = ref->xd; if (xd->xprefix != xprefix) continue; if (!xd->xname) { rc = load_xattr_datum(c, xd); if (unlikely(rc > 0)) { |
8f2b6f49c [JFFS2][XATTR] Re... |
1109 |
*pref = ref->next; |
8a13695cb [JFFS2][XATTR] ri... |
1110 |
delete_xattr_ref(c, ref); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 |
goto retry; } else if (unlikely(rc < 0)) goto out; } if (!strcmp(xd->xname, xname)) { if (flags & XATTR_CREATE) { rc = -EEXIST; goto out; } if (!buffer) { |
8a13695cb [JFFS2][XATTR] ri... |
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 |
ref->ino = ic->ino; ref->xid = xd->xid; ref->xseqno |= XREF_DELETE_MARKER; rc = save_xattr_ref(c, ref); if (!rc) { *pref = ref->next; spin_lock(&c->erase_completion_lock); ref->next = c->xref_dead_list; c->xref_dead_list = ref; spin_unlock(&c->erase_completion_lock); |
c6e8c6ccf [JFFS2][XATTR] Fi... |
1131 |
unrefer_xattr_datum(c, xd); |
8a13695cb [JFFS2][XATTR] ri... |
1132 1133 1134 1135 1136 |
} else { ref->ic = ic; ref->xd = xd; ref->xseqno &= ~XREF_DELETE_MARKER; } |
aa98d7cf5 [JFFS2][XATTR] XA... |
1137 1138 1139 1140 1141 1142 |
goto out; } goto found; } } /* not found */ |
aa98d7cf5 [JFFS2][XATTR] XA... |
1143 1144 1145 1146 1147 |
if (flags & XATTR_REPLACE) { rc = -ENODATA; goto out; } if (!buffer) { |
c9f700f84 [JFFS2][XATTR] us... |
1148 |
rc = -ENODATA; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1149 1150 1151 |
goto out; } found: |
9fe4854cd [JFFS2] Remove fl... |
1152 |
xd = create_xattr_datum(c, xprefix, xname, buffer, size); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1153 1154 1155 1156 1157 1158 1159 1160 1161 |
if (IS_ERR(xd)) { rc = PTR_ERR(xd); goto out; } up_write(&c->xattr_sem); jffs2_complete_reservation(c); /* create xattr_ref */ request = PAD(sizeof(struct jffs2_raw_xref)); |
9fe4854cd [JFFS2] Remove fl... |
1162 |
rc = jffs2_reserve_space(c, request, &length, |
aa98d7cf5 [JFFS2][XATTR] XA... |
1163 |
ALLOC_NORMAL, JFFS2_SUMMARY_XREF_SIZE); |
c9f700f84 [JFFS2][XATTR] us... |
1164 |
down_write(&c->xattr_sem); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1165 1166 1167 |
if (rc) { JFFS2_WARNING("jffs2_reserve_space()=%d, request=%u ", rc, request); |
c6e8c6ccf [JFFS2][XATTR] Fi... |
1168 |
unrefer_xattr_datum(c, xd); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1169 1170 1171 |
up_write(&c->xattr_sem); return rc; } |
8f2b6f49c [JFFS2][XATTR] Re... |
1172 1173 |
if (ref) *pref = ref->next; |
9fe4854cd [JFFS2] Remove fl... |
1174 |
newref = create_xattr_ref(c, ic, xd); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1175 |
if (IS_ERR(newref)) { |
8f2b6f49c [JFFS2][XATTR] Re... |
1176 1177 1178 1179 |
if (ref) { ref->next = ic->xref; ic->xref = ref; } |
aa98d7cf5 [JFFS2][XATTR] XA... |
1180 |
rc = PTR_ERR(newref); |
c6e8c6ccf [JFFS2][XATTR] Fi... |
1181 |
unrefer_xattr_datum(c, xd); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1182 |
} else if (ref) { |
8a13695cb [JFFS2][XATTR] ri... |
1183 |
delete_xattr_ref(c, ref); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1184 1185 1186 1187 1188 1189 1190 1191 |
} out: up_write(&c->xattr_sem); jffs2_complete_reservation(c); return rc; } /* -------- garbage collector functions ------------- |
c9f700f84 [JFFS2][XATTR] us... |
1192 |
* jffs2_garbage_collect_xattr_datum(c, xd, raw) |
aa98d7cf5 [JFFS2][XATTR] XA... |
1193 |
* is used to move xdatum into new node. |
c9f700f84 [JFFS2][XATTR] us... |
1194 |
* jffs2_garbage_collect_xattr_ref(c, ref, raw) |
aa98d7cf5 [JFFS2][XATTR] XA... |
1195 |
* is used to move xref into new node. |
aa98d7cf5 [JFFS2][XATTR] XA... |
1196 1197 |
* jffs2_verify_xattr(c) * is used to call do_verify_xattr_datum() before garbage collecting. |
8a13695cb [JFFS2][XATTR] ri... |
1198 1199 1200 1201 |
* jffs2_release_xattr_datum(c, xd) * is used to release an in-memory object of xdatum. * jffs2_release_xattr_ref(c, ref) * is used to release an in-memory object of xref. |
aa98d7cf5 [JFFS2][XATTR] XA... |
1202 |
* -------------------------------------------------- */ |
c9f700f84 [JFFS2][XATTR] us... |
1203 1204 |
int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd, struct jffs2_raw_node_ref *raw) |
aa98d7cf5 [JFFS2][XATTR] XA... |
1205 |
{ |
9fe4854cd [JFFS2] Remove fl... |
1206 |
uint32_t totlen, length, old_ofs; |
c9f700f84 [JFFS2][XATTR] us... |
1207 |
int rc = 0; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1208 |
|
084702e00 [JFFS2][XATTR] Re... |
1209 |
down_write(&c->xattr_sem); |
c9f700f84 [JFFS2][XATTR] us... |
1210 1211 |
if (xd->node != raw) goto out; |
8a13695cb [JFFS2][XATTR] ri... |
1212 |
if (xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID)) |
c9f700f84 [JFFS2][XATTR] us... |
1213 |
goto out; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1214 |
|
8a13695cb [JFFS2][XATTR] ri... |
1215 1216 1217 1218 |
rc = load_xattr_datum(c, xd); if (unlikely(rc)) { rc = (rc > 0) ? 0 : rc; goto out; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1219 |
} |
8a13695cb [JFFS2][XATTR] ri... |
1220 1221 1222 |
old_ofs = ref_offset(xd->node); totlen = PAD(sizeof(struct jffs2_raw_xattr) + xd->name_len + 1 + xd->value_len); |
9fe4854cd [JFFS2] Remove fl... |
1223 |
rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XATTR_SIZE); |
c9f700f84 [JFFS2][XATTR] us... |
1224 1225 1226 |
if (rc) { JFFS2_WARNING("jffs2_reserve_space_gc()=%d, request=%u ", rc, totlen); |
084702e00 [JFFS2][XATTR] Re... |
1227 |
goto out; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1228 |
} |
9fe4854cd [JFFS2] Remove fl... |
1229 |
rc = save_xattr_datum(c, xd); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1230 1231 1232 1233 |
if (!rc) dbg_xattr("xdatum (xid=%u, version=%u) GC'ed from %#08x to %08x ", xd->xid, xd->version, old_ofs, ref_offset(xd->node)); |
084702e00 [JFFS2][XATTR] Re... |
1234 |
out: |
c9f700f84 [JFFS2][XATTR] us... |
1235 1236 |
if (!rc) jffs2_mark_node_obsolete(c, raw); |
084702e00 [JFFS2][XATTR] Re... |
1237 |
up_write(&c->xattr_sem); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1238 1239 |
return rc; } |
c9f700f84 [JFFS2][XATTR] us... |
1240 1241 |
int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref, struct jffs2_raw_node_ref *raw) |
aa98d7cf5 [JFFS2][XATTR] XA... |
1242 |
{ |
9fe4854cd [JFFS2] Remove fl... |
1243 |
uint32_t totlen, length, old_ofs; |
c9f700f84 [JFFS2][XATTR] us... |
1244 |
int rc = 0; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1245 |
|
084702e00 [JFFS2][XATTR] Re... |
1246 |
down_write(&c->xattr_sem); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1247 |
BUG_ON(!ref->node); |
c9f700f84 [JFFS2][XATTR] us... |
1248 1249 1250 1251 |
if (ref->node != raw) goto out; if (is_xattr_ref_dead(ref) && (raw->next_in_ino == (void *)ref)) goto out; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1252 1253 |
old_ofs = ref_offset(ref->node); totlen = ref_totlen(c, c->gcblock, ref->node); |
084702e00 [JFFS2][XATTR] Re... |
1254 |
|
9fe4854cd [JFFS2] Remove fl... |
1255 |
rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XREF_SIZE); |
c9f700f84 [JFFS2][XATTR] us... |
1256 1257 1258 |
if (rc) { JFFS2_WARNING("%s: jffs2_reserve_space_gc() = %d, request = %u ", |
8e24eea72 fs: replace remai... |
1259 |
__func__, rc, totlen); |
084702e00 [JFFS2][XATTR] Re... |
1260 |
goto out; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1261 |
} |
9fe4854cd [JFFS2] Remove fl... |
1262 |
rc = save_xattr_ref(c, ref); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1263 1264 1265 1266 |
if (!rc) dbg_xattr("xref (ino=%u, xid=%u) GC'ed from %#08x to %08x ", ref->ic->ino, ref->xd->xid, old_ofs, ref_offset(ref->node)); |
084702e00 [JFFS2][XATTR] Re... |
1267 |
out: |
c9f700f84 [JFFS2][XATTR] us... |
1268 1269 |
if (!rc) jffs2_mark_node_obsolete(c, raw); |
084702e00 [JFFS2][XATTR] Re... |
1270 |
up_write(&c->xattr_sem); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1271 1272 |
return rc; } |
aa98d7cf5 [JFFS2][XATTR] XA... |
1273 1274 1275 |
int jffs2_verify_xattr(struct jffs2_sb_info *c) { struct jffs2_xattr_datum *xd, *_xd; |
c9f700f84 [JFFS2][XATTR] us... |
1276 1277 1278 |
struct jffs2_eraseblock *jeb; struct jffs2_raw_node_ref *raw; uint32_t totlen; |
aa98d7cf5 [JFFS2][XATTR] XA... |
1279 1280 1281 1282 1283 |
int rc; down_write(&c->xattr_sem); list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) { rc = do_verify_xattr_datum(c, xd); |
c9f700f84 [JFFS2][XATTR] us... |
1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 |
if (rc < 0) continue; list_del_init(&xd->xindex); spin_lock(&c->erase_completion_lock); for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) { if (ref_flags(raw) != REF_UNCHECKED) continue; jeb = &c->blocks[ref_offset(raw) / c->sector_size]; totlen = PAD(ref_totlen(c, jeb, raw)); c->unchecked_size -= totlen; c->used_size += totlen; jeb->unchecked_size -= totlen; jeb->used_size += totlen; raw->flash_offset = ref_offset(raw) | ((xd->node == (void *)raw) ? REF_PRISTINE : REF_NORMAL); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1297 |
} |
8a13695cb [JFFS2][XATTR] ri... |
1298 |
if (xd->flags & JFFS2_XFLAGS_DEAD) |
c9f700f84 [JFFS2][XATTR] us... |
1299 1300 |
list_add(&xd->xindex, &c->xattr_dead_list); spin_unlock(&c->erase_completion_lock); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1301 1302 |
} up_write(&c->xattr_sem); |
aa98d7cf5 [JFFS2][XATTR] XA... |
1303 1304 |
return list_empty(&c->xattr_unchecked) ? 1 : 0; } |
c9f700f84 [JFFS2][XATTR] us... |
1305 1306 1307 1308 |
void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd) { /* must be called under spin_lock(&c->erase_completion_lock) */ |
2c887e235 [JFFS2][XATTR] Re... |
1309 |
if (atomic_read(&xd->refcnt) || xd->node != (void *)xd) |
c9f700f84 [JFFS2][XATTR] us... |
1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 |
return; list_del(&xd->xindex); jffs2_free_xattr_datum(xd); } void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref) { /* must be called under spin_lock(&c->erase_completion_lock) */ struct jffs2_xattr_ref *tmp, **ptmp; if (ref->node != (void *)ref) return; for (tmp=c->xref_dead_list, ptmp=&c->xref_dead_list; tmp; ptmp=&tmp->next, tmp=tmp->next) { if (ref == tmp) { *ptmp = tmp->next; |
c9f700f84 [JFFS2][XATTR] us... |
1327 1328 1329 |
break; } } |
8a13695cb [JFFS2][XATTR] ri... |
1330 |
jffs2_free_xattr_ref(ref); |
c9f700f84 [JFFS2][XATTR] us... |
1331 |
} |