X-Git-Url: http://git.cascardo.eti.br/?a=blobdiff_plain;f=fs%2Fbtrfs%2Fextent_io.c;h=66a755150056ed06af2c3bc636b4dc76f45adce5;hb=0e60439c22ec551e9b5780eba73ddfeb63ab63d9;hp=8c4a0a09c221c7d48a4b25663444be15de168c1b;hpb=62e855771dacf7c4d6daf9741642a965e7066d31;p=cascardo%2Flinux.git diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 8c4a0a09c221..66a755150056 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2120,8 +2120,9 @@ int clean_io_failure(struct inode *inode, u64 start, struct page *page, if (failrec->in_validation) { /* there was no real error, just free the record */ - pr_debug("clean_io_failure: freeing dummy error at %llu\n", - failrec->start); + btrfs_debug(fs_info, + "clean_io_failure: freeing dummy error at %llu", + failrec->start); goto out; } if (fs_info->sb->s_flags & MS_RDONLY) @@ -2187,6 +2188,7 @@ void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end) int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, struct io_failure_record **failrec_ret) { + struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); struct io_failure_record *failrec; struct extent_map *em; struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree; @@ -2234,8 +2236,9 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, em->compress_type); } - pr_debug("Get IO Failure Record: (new) logical=%llu, start=%llu, len=%llu\n", - logical, start, failrec->len); + btrfs_debug(fs_info, + "Get IO Failure Record: (new) logical=%llu, start=%llu, len=%llu", + logical, start, failrec->len); failrec->logical = logical; free_extent_map(em); @@ -2253,9 +2256,10 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, return ret; } } else { - pr_debug("Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d\n", - failrec->logical, failrec->start, failrec->len, - failrec->in_validation); + btrfs_debug(fs_info, + "Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d", + failrec->logical, failrec->start, failrec->len, + failrec->in_validation); /* * when data can be on disk more than twice, add to failrec here * (e.g. with a list for failed_mirror) to make @@ -2271,18 +2275,19 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio, struct io_failure_record *failrec, int failed_mirror) { + struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); int num_copies; - num_copies = btrfs_num_copies(BTRFS_I(inode)->root->fs_info, - failrec->logical, failrec->len); + num_copies = btrfs_num_copies(fs_info, failrec->logical, failrec->len); if (num_copies == 1) { /* * we only have a single copy of the data, so don't bother with * all the retry and error correction code that follows. no * matter what the error is, it is very likely to persist. */ - pr_debug("Check Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d\n", - num_copies, failrec->this_mirror, failed_mirror); + btrfs_debug(fs_info, + "Check Repairable: cannot repair, num_copies=%d, next_mirror %d, failed_mirror %d", + num_copies, failrec->this_mirror, failed_mirror); return 0; } @@ -2321,8 +2326,9 @@ int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio, } if (failrec->this_mirror > num_copies) { - pr_debug("Check Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d\n", - num_copies, failrec->this_mirror, failed_mirror); + btrfs_debug(fs_info, + "Check Repairable: (fail) num_copies=%d, next_mirror %d, failed_mirror %d", + num_copies, failrec->this_mirror, failed_mirror); return 0; } @@ -2413,8 +2419,9 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset, } bio_set_op_attrs(bio, REQ_OP_READ, read_mode); - pr_debug("Repair Read Error: submitting new read[%#x] to this_mirror=%d, in_validation=%d\n", - read_mode, failrec->this_mirror, failrec->in_validation); + btrfs_debug(btrfs_sb(inode->i_sb), + "Repair Read Error: submitting new read[%#x] to this_mirror=%d, in_validation=%d", + read_mode, failrec->this_mirror, failrec->in_validation); ret = tree->ops->submit_bio_hook(inode, bio, failrec->this_mirror, failrec->bio_flags, 0); @@ -2538,10 +2545,12 @@ static void end_bio_extent_readpage(struct bio *bio) bio_for_each_segment_all(bvec, bio, i) { struct page *page = bvec->bv_page; struct inode *inode = page->mapping->host; + struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); - pr_debug("end_bio_extent_readpage: bi_sector=%llu, err=%d, mirror=%u\n", - (u64)bio->bi_iter.bi_sector, - bio->bi_error, io_bio->mirror_num); + btrfs_debug(fs_info, + "end_bio_extent_readpage: bi_sector=%llu, err=%d, mirror=%u", + (u64)bio->bi_iter.bi_sector, bio->bi_error, + io_bio->mirror_num); tree = &BTRFS_I(inode)->io_tree; /* We always issue full-page reads, but if some block @@ -2551,12 +2560,12 @@ static void end_bio_extent_readpage(struct bio *bio) * if they don't add up to a full page. */ if (bvec->bv_offset || bvec->bv_len != PAGE_SIZE) { if (bvec->bv_offset + bvec->bv_len != PAGE_SIZE) - btrfs_err(BTRFS_I(page->mapping->host)->root->fs_info, - "partial page read in btrfs with offset %u and length %u", + btrfs_err(fs_info, + "partial page read in btrfs with offset %u and length %u", bvec->bv_offset, bvec->bv_len); else - btrfs_info(BTRFS_I(page->mapping->host)->root->fs_info, - "incomplete page read in btrfs with offset %u and length %u", + btrfs_info(fs_info, + "incomplete page read in btrfs with offset %u and length %u", bvec->bv_offset, bvec->bv_len); } @@ -3716,8 +3725,10 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb, struct block_device *bdev = fs_info->fs_devices->latest_bdev; struct extent_io_tree *tree = &BTRFS_I(fs_info->btree_inode)->io_tree; u64 offset = eb->start; + u32 nritems; unsigned long i, num_pages; unsigned long bio_flags = 0; + unsigned long start, end; int write_flags = (epd->sync_io ? WRITE_SYNC : 0) | REQ_META; int ret = 0; @@ -3727,15 +3738,21 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb, if (btrfs_header_owner(eb) == BTRFS_TREE_LOG_OBJECTID) bio_flags = EXTENT_BIO_TREE_LOG; - /* set btree node beyond nritems with 0 to avoid stale content */ + /* set btree blocks beyond nritems with 0 to avoid stale content. */ + nritems = btrfs_header_nritems(eb); if (btrfs_header_level(eb) > 0) { - u32 nritems; - unsigned long end; - - nritems = btrfs_header_nritems(eb); end = btrfs_node_key_ptr_offset(nritems); memset_extent_buffer(eb, 0, end, eb->len - end); + } else { + /* + * leaf: + * header 0 1 2 .. N ... data_N .. data_2 data_1 data_0 + */ + start = btrfs_item_nr_offset(nritems); + end = btrfs_leaf_data(eb) + + leaf_data_end(fs_info->tree_root, eb); + memset_extent_buffer(eb, 0, start, end - start); } for (i = 0; i < num_pages; i++) { @@ -5541,17 +5558,45 @@ void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, } } -/* - * The extent buffer bitmap operations are done with byte granularity because - * bitmap items are not guaranteed to be aligned to a word and therefore a - * single word in a bitmap may straddle two pages in the extent buffer. - */ -#define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE) -#define BYTE_MASK ((1 << BITS_PER_BYTE) - 1) -#define BITMAP_FIRST_BYTE_MASK(start) \ - ((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK) -#define BITMAP_LAST_BYTE_MASK(nbits) \ - (BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1))) +void le_bitmap_set(u8 *map, unsigned int start, int len) +{ + u8 *p = map + BIT_BYTE(start); + const unsigned int size = start + len; + int bits_to_set = BITS_PER_BYTE - (start % BITS_PER_BYTE); + u8 mask_to_set = BITMAP_FIRST_BYTE_MASK(start); + + while (len - bits_to_set >= 0) { + *p |= mask_to_set; + len -= bits_to_set; + bits_to_set = BITS_PER_BYTE; + mask_to_set = ~(u8)0; + p++; + } + if (len) { + mask_to_set &= BITMAP_LAST_BYTE_MASK(size); + *p |= mask_to_set; + } +} + +void le_bitmap_clear(u8 *map, unsigned int start, int len) +{ + u8 *p = map + BIT_BYTE(start); + const unsigned int size = start + len; + int bits_to_clear = BITS_PER_BYTE - (start % BITS_PER_BYTE); + u8 mask_to_clear = BITMAP_FIRST_BYTE_MASK(start); + + while (len - bits_to_clear >= 0) { + *p &= ~mask_to_clear; + len -= bits_to_clear; + bits_to_clear = BITS_PER_BYTE; + mask_to_clear = ~(u8)0; + p++; + } + if (len) { + mask_to_clear &= BITMAP_LAST_BYTE_MASK(size); + *p &= ~mask_to_clear; + } +} /* * eb_bitmap_offset() - calculate the page and offset of the byte containing the @@ -5595,7 +5640,7 @@ static inline void eb_bitmap_offset(struct extent_buffer *eb, int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start, unsigned long nr) { - char *kaddr; + u8 *kaddr; struct page *page; unsigned long i; size_t offset; @@ -5617,13 +5662,13 @@ int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start, void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start, unsigned long pos, unsigned long len) { - char *kaddr; + u8 *kaddr; struct page *page; unsigned long i; size_t offset; const unsigned int size = pos + len; int bits_to_set = BITS_PER_BYTE - (pos % BITS_PER_BYTE); - unsigned int mask_to_set = BITMAP_FIRST_BYTE_MASK(pos); + u8 mask_to_set = BITMAP_FIRST_BYTE_MASK(pos); eb_bitmap_offset(eb, start, pos, &i, &offset); page = eb->pages[i]; @@ -5634,7 +5679,7 @@ void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start, kaddr[offset] |= mask_to_set; len -= bits_to_set; bits_to_set = BITS_PER_BYTE; - mask_to_set = ~0U; + mask_to_set = ~(u8)0; if (++offset >= PAGE_SIZE && len > 0) { offset = 0; page = eb->pages[++i]; @@ -5659,13 +5704,13 @@ void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start, void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start, unsigned long pos, unsigned long len) { - char *kaddr; + u8 *kaddr; struct page *page; unsigned long i; size_t offset; const unsigned int size = pos + len; int bits_to_clear = BITS_PER_BYTE - (pos % BITS_PER_BYTE); - unsigned int mask_to_clear = BITMAP_FIRST_BYTE_MASK(pos); + u8 mask_to_clear = BITMAP_FIRST_BYTE_MASK(pos); eb_bitmap_offset(eb, start, pos, &i, &offset); page = eb->pages[i]; @@ -5676,7 +5721,7 @@ void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start, kaddr[offset] &= ~mask_to_clear; len -= bits_to_clear; bits_to_clear = BITS_PER_BYTE; - mask_to_clear = ~0U; + mask_to_clear = ~(u8)0; if (++offset >= PAGE_SIZE && len > 0) { offset = 0; page = eb->pages[++i];