f2fs: introduce DATA_GENERIC_ENHANCE
Previously, f2fs_is_valid_blkaddr(, blkaddr, DATA_GENERIC) will check whether @blkaddr locates in main area or not. That check is weak, since the block address in range of main area can point to the address which is not valid in segment info table, and we can not detect such condition, we may suffer worse corruption as system continues running. So this patch introduce DATA_GENERIC_ENHANCE to enhance the sanity check which trigger SIT bitmap check rather than only range check. This patch did below changes as wel: - set SBI_NEED_FSCK in f2fs_is_valid_blkaddr(). - get rid of is_valid_data_blkaddr() to avoid panic if blkaddr is invalid. - introduce verify_fio_blkaddr() to wrap fio {new,old}_blkaddr validation check. - spread blkaddr check in: * f2fs_get_node_info() * __read_out_blkaddrs() * f2fs_submit_page_read() * ra_data_block() * do_recover_data() This patch can fix bug reported from bugzilla below: https://bugzilla.kernel.org/show_bug.cgi?id=203215 https://bugzilla.kernel.org/show_bug.cgi?id=203223 https://bugzilla.kernel.org/show_bug.cgi?id=203231 https://bugzilla.kernel.org/show_bug.cgi?id=203235 https://bugzilla.kernel.org/show_bug.cgi?id=203241 = Update by Jaegeuk Kim = DATA_GENERIC_ENHANCE enhanced to validate block addresses on read/write paths. But, xfstest/generic/446 compalins some generated kernel messages saying invalid bitmap was detected when reading a block. The reaons is, when we get the block addresses from extent_cache, there is no lock to synchronize it from truncating the blocks in parallel. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
parent
896285ad02
commit
93770ab7a6
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@ -130,6 +130,30 @@ struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
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return __get_meta_page(sbi, index, false);
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}
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static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
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int type)
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{
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struct seg_entry *se;
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unsigned int segno, offset;
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bool exist;
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if (type != DATA_GENERIC_ENHANCE && type != DATA_GENERIC_ENHANCE_READ)
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return true;
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segno = GET_SEGNO(sbi, blkaddr);
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offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
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se = get_seg_entry(sbi, segno);
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exist = f2fs_test_bit(offset, se->cur_valid_map);
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if (!exist && type == DATA_GENERIC_ENHANCE) {
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f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
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"blkaddr:%u, sit bitmap:%d", blkaddr, exist);
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set_sbi_flag(sbi, SBI_NEED_FSCK);
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WARN_ON(1);
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}
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return exist;
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}
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bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
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block_t blkaddr, int type)
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{
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@ -151,15 +175,22 @@ bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
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return false;
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break;
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case META_POR:
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case DATA_GENERIC:
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if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
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blkaddr < MAIN_BLKADDR(sbi))) {
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if (type == DATA_GENERIC) {
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f2fs_msg(sbi->sb, KERN_WARNING,
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"access invalid blkaddr:%u", blkaddr);
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WARN_ON(1);
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}
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blkaddr < MAIN_BLKADDR(sbi)))
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return false;
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break;
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case DATA_GENERIC:
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case DATA_GENERIC_ENHANCE:
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case DATA_GENERIC_ENHANCE_READ:
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if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
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blkaddr < MAIN_BLKADDR(sbi))) {
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f2fs_msg(sbi->sb, KERN_WARNING,
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"access invalid blkaddr:%u", blkaddr);
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set_sbi_flag(sbi, SBI_NEED_FSCK);
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WARN_ON(1);
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return false;
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} else {
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return __is_bitmap_valid(sbi, blkaddr, type);
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}
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break;
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case META_GENERIC:
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@ -456,8 +456,8 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
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fio->encrypted_page : fio->page;
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if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
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fio->is_por ? META_POR :
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(__is_meta_io(fio) ? META_GENERIC : DATA_GENERIC)))
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fio->is_por ? META_POR : (__is_meta_io(fio) ?
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META_GENERIC : DATA_GENERIC_ENHANCE)))
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return -EFAULT;
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trace_f2fs_submit_page_bio(page, fio);
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@ -507,9 +507,7 @@ next:
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spin_unlock(&io->io_lock);
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}
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if (__is_valid_data_blkaddr(fio->old_blkaddr))
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verify_block_addr(fio, fio->old_blkaddr);
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verify_block_addr(fio, fio->new_blkaddr);
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verify_fio_blkaddr(fio);
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bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page;
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@ -566,9 +564,6 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
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struct bio_post_read_ctx *ctx;
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unsigned int post_read_steps = 0;
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if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC))
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return ERR_PTR(-EFAULT);
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bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false);
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if (!bio)
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return ERR_PTR(-ENOMEM);
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@ -596,8 +591,10 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
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static int f2fs_submit_page_read(struct inode *inode, struct page *page,
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block_t blkaddr)
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{
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struct bio *bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0);
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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struct bio *bio;
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bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0);
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if (IS_ERR(bio))
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return PTR_ERR(bio);
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@ -609,8 +606,8 @@ static int f2fs_submit_page_read(struct inode *inode, struct page *page,
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return -EFAULT;
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}
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ClearPageError(page);
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inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
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__submit_bio(F2FS_I_SB(inode), bio, DATA);
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inc_page_count(sbi, F2FS_RD_DATA);
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__submit_bio(sbi, bio, DATA);
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return 0;
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}
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@ -738,6 +735,11 @@ struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
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if (f2fs_lookup_extent_cache(inode, index, &ei)) {
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dn.data_blkaddr = ei.blk + index - ei.fofs;
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if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
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DATA_GENERIC_ENHANCE_READ)) {
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err = -EFAULT;
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goto put_err;
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}
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goto got_it;
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}
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@ -751,6 +753,13 @@ struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
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err = -ENOENT;
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goto put_err;
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}
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if (dn.data_blkaddr != NEW_ADDR &&
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!f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
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dn.data_blkaddr,
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DATA_GENERIC_ENHANCE)) {
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err = -EFAULT;
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goto put_err;
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}
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got_it:
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if (PageUptodate(page)) {
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unlock_page(page);
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@ -1093,12 +1102,12 @@ next_block:
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blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
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if (__is_valid_data_blkaddr(blkaddr) &&
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!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
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!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
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err = -EFAULT;
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goto sync_out;
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}
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if (is_valid_data_blkaddr(sbi, blkaddr)) {
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if (__is_valid_data_blkaddr(blkaddr)) {
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/* use out-place-update for driect IO under LFS mode */
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if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
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map->m_may_create) {
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@ -1563,7 +1572,7 @@ got_it:
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}
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if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
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DATA_GENERIC)) {
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DATA_GENERIC_ENHANCE_READ)) {
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ret = -EFAULT;
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goto out;
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}
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@ -1844,7 +1853,7 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio)
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fio->old_blkaddr = ei.blk + page->index - ei.fofs;
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if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
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DATA_GENERIC))
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DATA_GENERIC_ENHANCE))
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return -EFAULT;
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ipu_force = true;
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@ -1871,7 +1880,7 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio)
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got_it:
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if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
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!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
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DATA_GENERIC)) {
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DATA_GENERIC_ENHANCE)) {
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err = -EFAULT;
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goto out_writepage;
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}
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@ -1879,7 +1888,8 @@ got_it:
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* If current allocation needs SSR,
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* it had better in-place writes for updated data.
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*/
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if (ipu_force || (is_valid_data_blkaddr(fio->sbi, fio->old_blkaddr) &&
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if (ipu_force ||
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(__is_valid_data_blkaddr(fio->old_blkaddr) &&
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need_inplace_update(fio))) {
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err = encrypt_one_page(fio);
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if (err)
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@ -2524,6 +2534,11 @@ repeat:
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zero_user_segment(page, 0, PAGE_SIZE);
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SetPageUptodate(page);
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} else {
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if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
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DATA_GENERIC_ENHANCE_READ)) {
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err = -EFAULT;
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goto fail;
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}
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err = f2fs_submit_page_read(inode, page, blkaddr);
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if (err)
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goto fail;
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@ -210,7 +210,14 @@ enum {
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META_SSA,
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META_MAX,
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META_POR,
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DATA_GENERIC,
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DATA_GENERIC, /* check range only */
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DATA_GENERIC_ENHANCE, /* strong check on range and segment bitmap */
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DATA_GENERIC_ENHANCE_READ, /*
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* strong check on range and segment
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* bitmap but no warning due to race
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* condition of read on truncated area
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* by extent_cache
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*/
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META_GENERIC,
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};
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@ -2864,15 +2871,6 @@ static inline bool __is_valid_data_blkaddr(block_t blkaddr)
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return true;
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}
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static inline bool is_valid_data_blkaddr(struct f2fs_sb_info *sbi,
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block_t blkaddr)
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{
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if (!__is_valid_data_blkaddr(blkaddr))
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return false;
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verify_blkaddr(sbi, blkaddr, DATA_GENERIC);
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return true;
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}
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static inline void f2fs_set_page_private(struct page *page,
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unsigned long data)
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{
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@ -356,7 +356,7 @@ static bool __found_offset(struct f2fs_sb_info *sbi, block_t blkaddr,
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switch (whence) {
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case SEEK_DATA:
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if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
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is_valid_data_blkaddr(sbi, blkaddr))
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__is_valid_data_blkaddr(blkaddr))
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return true;
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break;
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case SEEK_HOLE:
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@ -422,7 +422,7 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
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if (__is_valid_data_blkaddr(blkaddr) &&
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!f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
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blkaddr, DATA_GENERIC)) {
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blkaddr, DATA_GENERIC_ENHANCE)) {
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f2fs_put_dnode(&dn);
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goto fail;
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}
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@ -523,7 +523,8 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
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f2fs_set_data_blkaddr(dn);
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if (__is_valid_data_blkaddr(blkaddr) &&
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!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC))
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!f2fs_is_valid_blkaddr(sbi, blkaddr,
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DATA_GENERIC_ENHANCE))
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continue;
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f2fs_invalidate_blocks(sbi, blkaddr);
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@ -1018,6 +1019,14 @@ next_dnode:
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for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
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*blkaddr = datablock_addr(dn.inode,
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dn.node_page, dn.ofs_in_node);
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if (__is_valid_data_blkaddr(*blkaddr) &&
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!f2fs_is_valid_blkaddr(sbi, *blkaddr,
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DATA_GENERIC_ENHANCE)) {
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f2fs_put_dnode(&dn);
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return -EFAULT;
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}
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if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
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if (test_opt(sbi, LFS)) {
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11
fs/f2fs/gc.c
11
fs/f2fs/gc.c
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@ -656,6 +656,11 @@ static int ra_data_block(struct inode *inode, pgoff_t index)
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if (f2fs_lookup_extent_cache(inode, index, &ei)) {
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dn.data_blkaddr = ei.blk + index - ei.fofs;
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if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
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DATA_GENERIC_ENHANCE_READ))) {
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err = -EFAULT;
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goto put_page;
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}
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goto got_it;
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}
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@ -665,8 +670,12 @@ static int ra_data_block(struct inode *inode, pgoff_t index)
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goto put_page;
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f2fs_put_dnode(&dn);
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if (!__is_valid_data_blkaddr(dn.data_blkaddr)) {
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err = -ENOENT;
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goto put_page;
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}
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if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
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DATA_GENERIC))) {
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DATA_GENERIC_ENHANCE))) {
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err = -EFAULT;
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goto put_page;
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}
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@ -73,7 +73,7 @@ static int __written_first_block(struct f2fs_sb_info *sbi,
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if (!__is_valid_data_blkaddr(addr))
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return 1;
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if (!f2fs_is_valid_blkaddr(sbi, addr, DATA_GENERIC))
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if (!f2fs_is_valid_blkaddr(sbi, addr, DATA_GENERIC_ENHANCE))
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return -EFAULT;
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return 0;
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}
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@ -267,9 +267,10 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page)
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struct extent_info *ei = &F2FS_I(inode)->extent_tree->largest;
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if (ei->len &&
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(!f2fs_is_valid_blkaddr(sbi, ei->blk, DATA_GENERIC) ||
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(!f2fs_is_valid_blkaddr(sbi, ei->blk,
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DATA_GENERIC_ENHANCE) ||
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!f2fs_is_valid_blkaddr(sbi, ei->blk + ei->len - 1,
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DATA_GENERIC))) {
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DATA_GENERIC_ENHANCE))) {
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set_sbi_flag(sbi, SBI_NEED_FSCK);
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f2fs_msg(sbi->sb, KERN_WARNING,
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"%s: inode (ino=%lx) extent info [%u, %u, %u] "
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@ -454,7 +454,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
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new_blkaddr == NULL_ADDR);
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f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR &&
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new_blkaddr == NEW_ADDR);
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f2fs_bug_on(sbi, is_valid_data_blkaddr(sbi, nat_get_blkaddr(e)) &&
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f2fs_bug_on(sbi, __is_valid_data_blkaddr(nat_get_blkaddr(e)) &&
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new_blkaddr == NEW_ADDR);
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/* increment version no as node is removed */
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@ -465,7 +465,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
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/* change address */
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nat_set_blkaddr(e, new_blkaddr);
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if (!is_valid_data_blkaddr(sbi, new_blkaddr))
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if (!__is_valid_data_blkaddr(new_blkaddr))
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set_nat_flag(e, IS_CHECKPOINTED, false);
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__set_nat_cache_dirty(nm_i, e);
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@ -526,6 +526,7 @@ int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid,
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struct f2fs_nat_entry ne;
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struct nat_entry *e;
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pgoff_t index;
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block_t blkaddr;
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int i;
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ni->nid = nid;
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@ -569,6 +570,11 @@ int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid,
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node_info_from_raw_nat(ni, &ne);
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f2fs_put_page(page, 1);
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cache:
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blkaddr = le32_to_cpu(ne.block_addr);
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if (__is_valid_data_blkaddr(blkaddr) &&
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!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE))
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return -EFAULT;
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/* cache nat entry */
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cache_nat_entry(sbi, nid, &ne);
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return 0;
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@ -1548,7 +1554,8 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
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}
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if (__is_valid_data_blkaddr(ni.blk_addr) &&
|
||||
!f2fs_is_valid_blkaddr(sbi, ni.blk_addr, DATA_GENERIC)) {
|
||||
!f2fs_is_valid_blkaddr(sbi, ni.blk_addr,
|
||||
DATA_GENERIC_ENHANCE)) {
|
||||
up_read(&sbi->node_write);
|
||||
goto redirty_out;
|
||||
}
|
||||
|
|
|
@ -567,6 +567,18 @@ retry_dn:
|
|||
src = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
|
||||
dest = datablock_addr(dn.inode, page, dn.ofs_in_node);
|
||||
|
||||
if (__is_valid_data_blkaddr(src) &&
|
||||
!f2fs_is_valid_blkaddr(sbi, src, META_POR)) {
|
||||
err = -EFAULT;
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (__is_valid_data_blkaddr(dest) &&
|
||||
!f2fs_is_valid_blkaddr(sbi, dest, META_POR)) {
|
||||
err = -EFAULT;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* skip recovering if dest is the same as src */
|
||||
if (src == dest)
|
||||
continue;
|
||||
|
|
|
@ -2217,7 +2217,7 @@ bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
|
|||
struct seg_entry *se;
|
||||
bool is_cp = false;
|
||||
|
||||
if (!is_valid_data_blkaddr(sbi, blkaddr))
|
||||
if (!__is_valid_data_blkaddr(blkaddr))
|
||||
return true;
|
||||
|
||||
down_read(&sit_i->sentry_lock);
|
||||
|
@ -3338,7 +3338,7 @@ void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr)
|
|||
if (!f2fs_post_read_required(inode))
|
||||
return;
|
||||
|
||||
if (!is_valid_data_blkaddr(sbi, blkaddr))
|
||||
if (!__is_valid_data_blkaddr(blkaddr))
|
||||
return;
|
||||
|
||||
cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
|
||||
|
|
|
@ -82,7 +82,7 @@
|
|||
(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & ((sbi)->blocks_per_seg - 1))
|
||||
|
||||
#define GET_SEGNO(sbi, blk_addr) \
|
||||
((!is_valid_data_blkaddr(sbi, blk_addr)) ? \
|
||||
((!__is_valid_data_blkaddr(blk_addr)) ? \
|
||||
NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \
|
||||
GET_SEGNO_FROM_SEG0(sbi, blk_addr)))
|
||||
#define BLKS_PER_SEC(sbi) \
|
||||
|
@ -656,14 +656,15 @@ static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
|
|||
f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1);
|
||||
}
|
||||
|
||||
static inline void verify_block_addr(struct f2fs_io_info *fio, block_t blk_addr)
|
||||
static inline void verify_fio_blkaddr(struct f2fs_io_info *fio)
|
||||
{
|
||||
struct f2fs_sb_info *sbi = fio->sbi;
|
||||
|
||||
if (__is_meta_io(fio))
|
||||
verify_blkaddr(sbi, blk_addr, META_GENERIC);
|
||||
else
|
||||
verify_blkaddr(sbi, blk_addr, DATA_GENERIC);
|
||||
if (__is_valid_data_blkaddr(fio->old_blkaddr))
|
||||
verify_blkaddr(sbi, fio->old_blkaddr, __is_meta_io(fio) ?
|
||||
META_GENERIC : DATA_GENERIC);
|
||||
verify_blkaddr(sbi, fio->new_blkaddr, __is_meta_io(fio) ?
|
||||
META_GENERIC : DATA_GENERIC_ENHANCE);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
Loading…
Reference in a new issue